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    93. 

  93. <a href="census_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/*</span></div>
    94. 

  94. <div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> *</span></div>
    95. 

  95. <div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * Copyright 2015-2016, Google Inc.</span></div>
    96. 

  96. <div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> * All rights reserved.</span></div>
    97. 

  97. <div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> *</span></div>
    98. 

  98. <div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * Redistribution and use in source and binary forms, with or without</span></div>
    99. 

  99. <div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> * modification, are permitted provided that the following conditions are</span></div>
    100. 

  100. <div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"> * met:</span></div>
    101. 

  101. <div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment"> *</span></div>
    102. 

  102. <div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment"> *     * Redistributions of source code must retain the above copyright</span></div>
    103. 

  103. <div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment"> * notice, this list of conditions and the following disclaimer.</span></div>
    104. 

  104. <div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment"> *     * Redistributions in binary form must reproduce the above</span></div>
    105. 

  105. <div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment"> * copyright notice, this list of conditions and the following disclaimer</span></div>
    106. 

  106. <div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment"> * in the documentation and/or other materials provided with the</span></div>
    107. 

  107. <div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment"> * distribution.</span></div>
    108. 

  108. <div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment"> *     * Neither the name of Google Inc. nor the names of its</span></div>
    109. 

  109. <div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment"> * contributors may be used to endorse or promote products derived from</span></div>
    110. 

  110. <div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="comment"> * this software without specific prior written permission.</span></div>
    111. 

  111. <div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment"> *</span></div>
    112. 

  112. <div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS</span></div>
    113. 

  113. <div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="comment"> * &quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT</span></div>
    114. 

  114. <div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="comment"> * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR</span></div>
    115. 

  115. <div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="comment"> * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT</span></div>
    116. 

  116. <div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="comment"> * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span></div>
    117. 

  117. <div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="comment"> * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT</span></div>
    118. 

  118. <div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="comment"> * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,</span></div>
    119. 

  119. <div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="comment"> * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY</span></div>
    120. 

  120. <div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="comment"> * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</span></div>
    121. 

  121. <div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="comment"> * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE</span></div>
    122. 

  122. <div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="comment"> * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span></div>
    123. 

  123. <div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="comment"> *</span></div>
    124. 

  124. <div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="comment"> */</span></div>
    125. 

  125. <div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;</div>
    126. 

  126. <div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="comment">/* RPC-internal Census API&#39;s. These are designed to be generic enough that</span></div>
    127. 

  127. <div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="comment"> * they can (ultimately) be used in many different RPC systems (with differing</span></div>
    128. 

  128. <div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="comment"> * implementations). */</span></div>
    129. 

  129. <div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;</div>
    130. 

  130. <div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="preprocessor">#ifndef GRPC_CENSUS_H</span></div>
    131. 

  131. <div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define GRPC_CENSUS_H</span></div>
    132. 

  132. <div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="preprocessor"></span></div>
    133. 

  133. <div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="grpc_8h.html">grpc/grpc.h</a>&gt;</span></div>
    134. 

  134. <div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;</div>
    135. 

  135. <div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="preprocessor">#ifdef __cplusplus</span></div>
    136. 

  136. <div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="preprocessor"></span><span class="keyword">extern</span> <span class="stringliteral">&quot;C&quot;</span> {</div>
    137. 

  137. <div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="preprocessor">#endif</span></div>
    138. 

  138. <div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="preprocessor"></span></div>
    139. 

  139. <div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="comment">/* Identify census features that can be enabled via census_initialize(). */</span></div>
    140. 

  140. <div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8">   48</a></span>&#160;<span class="keyword">enum</span> <a class="code" href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8">census_features</a> {</div>
    141. 

  141. <div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8aac1986834f37851b8d899c4a08c8e3ab">   49</a></span>&#160;  <a class="code" href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8aac1986834f37851b8d899c4a08c8e3ab">CENSUS_FEATURE_NONE</a> = 0,    <span class="comment">/* Do not enable census. */</span></div>
    142. 

  142. <div class="line"><a name="l00050"></a><span class="lineno"><a class="line" href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8ab0722326e730113d5be97f643c3e6718">   50</a></span>&#160;  <a class="code" href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8ab0722326e730113d5be97f643c3e6718">CENSUS_FEATURE_TRACING</a> = 1, <span class="comment">/* Enable census tracing. */</span></div>
    143. 

  143. <div class="line"><a name="l00051"></a><span class="lineno"><a class="line" href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8a84c772b868e53ee3487c7bfc8e8b2f1a">   51</a></span>&#160;  <a class="code" href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8a84c772b868e53ee3487c7bfc8e8b2f1a">CENSUS_FEATURE_STATS</a> = 2,   <span class="comment">/* Enable Census stats collection. */</span></div>
    144. 

  144. <div class="line"><a name="l00052"></a><span class="lineno"><a class="line" href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8a4808bff624e2377596b86a6f58ab04b5">   52</a></span>&#160;  <a class="code" href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8a4808bff624e2377596b86a6f58ab04b5">CENSUS_FEATURE_CPU</a> = 4,     <span class="comment">/* Enable Census CPU usage collection. */</span></div>
    145. 

  145. <div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8aba96a94fb7af8cf1144ca14edc0b1f0c">   53</a></span>&#160;  <a class="code" href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8aba96a94fb7af8cf1144ca14edc0b1f0c">CENSUS_FEATURE_ALL</a> =</div>
    146. 

  146. <div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;      <a class="code" href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8ab0722326e730113d5be97f643c3e6718">CENSUS_FEATURE_TRACING</a> | <a class="code" href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8a84c772b868e53ee3487c7bfc8e8b2f1a">CENSUS_FEATURE_STATS</a> | <a class="code" href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8a4808bff624e2377596b86a6f58ab04b5">CENSUS_FEATURE_CPU</a></div>
    147. 

  147. <div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;};</div>
    148. 

  148. <div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;</div>
    149. 

  149. <div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">int</span> <a class="code" href="census_8h.html#a850c1ca105245a514e76519d5edaad2c">census_initialize</a>(<span class="keywordtype">int</span> features);</div>
    150. 

  150. <div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">void</span> <a class="code" href="census_8h.html#ad21073b22ae5c30cad63a29340f54048">census_shutdown</a>(<span class="keywordtype">void</span>);</div>
    151. 

  151. <div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;</div>
    152. 

  152. <div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">int</span> <a class="code" href="census_8h.html#ae22d3c8dfe3bfac5e831b0135ff7a536">census_supported</a>(<span class="keywordtype">void</span>);</div>
    153. 

  153. <div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;</div>
    154. 

  154. <div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">int</span> <a class="code" href="census_8h.html#a6964222b3c20833883d7d05ab6b6e67e">census_enabled</a>(<span class="keywordtype">void</span>);</div>
    155. 

  155. <div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;</div>
    156. 

  156. <div class="line"><a name="l00083"></a><span class="lineno"><a class="line" href="census_8h.html#a27fc8788690179599713226f1f054736">   83</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> <a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a>;</div>
    157. 

  157. <div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;</div>
    158. 

  158. <div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;<span class="comment">/* A tag is a key:value pair. Both keys and values are nil-terminated strings,</span></div>
    159. 

  159. <div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;<span class="comment">   containing printable ASCII characters (decimal 32-126). Keys must be at</span></div>
    160. 

  160. <div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;<span class="comment">   least one character in length. Both keys and values can have at most</span></div>
    161. 

  161. <div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;<span class="comment">   CENSUS_MAX_TAG_KB_LEN characters (including the terminating nil). The</span></div>
    162. 

  162. <div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;<span class="comment">   maximum number of tags that can be propagated is</span></div>
    163. 

  163. <div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;<span class="comment">   CENSUS_MAX_PROPAGATED_TAGS. Users should also remember that some systems</span></div>
    164. 

  164. <div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;<span class="comment">   may have limits on, e.g., the number of bytes that can be transmitted as</span></div>
    165. 

  165. <div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;<span class="comment">   metadata, and that larger tags means more memory consumed and time in</span></div>
    166. 

  166. <div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;<span class="comment">   processing. */</span></div>
    167. 

  167. <div class="line"><a name="l00094"></a><span class="lineno"><a class="line" href="structcensus__tag.html">   94</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span>{</div>
    168. 

  168. <div class="line"><a name="l00095"></a><span class="lineno"><a class="line" href="structcensus__tag.html#a13c8315749ec9752d8bb1354a131558b">   95</a></span>&#160;  <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="structcensus__tag.html#a13c8315749ec9752d8bb1354a131558b">key</a>;</div>
    169. 

  169. <div class="line"><a name="l00096"></a><span class="lineno"><a class="line" href="structcensus__tag.html#a8f4ef3177380ad53f7a8abe1441e8805">   96</a></span>&#160;  <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="structcensus__tag.html#a8f4ef3177380ad53f7a8abe1441e8805">value</a>;</div>
    170. 

  170. <div class="line"><a name="l00097"></a><span class="lineno"><a class="line" href="structcensus__tag.html#a5632d4c8316fb17bbb3af5cb9b0dd4f5">   97</a></span>&#160;  uint8_t <a class="code" href="structcensus__tag.html#a5632d4c8316fb17bbb3af5cb9b0dd4f5">flags</a>;</div>
    171. 

  171. <div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;} <a class="code" href="structcensus__tag.html">census_tag</a>;</div>
    172. 

  172. <div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;</div>
    173. 

  173. <div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;<span class="comment">/* Maximum length of a tag&#39;s key or value. */</span></div>
    174. 

  174. <div class="line"><a name="l00101"></a><span class="lineno"><a class="line" href="census_8h.html#ac3fa459cd0c1621953c46b07bac2faa7">  101</a></span>&#160;<span class="preprocessor">#define CENSUS_MAX_TAG_KV_LEN 255</span></div>
    175. 

  175. <div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;<span class="preprocessor"></span><span class="comment">/* Maximum number of propagatable tags. */</span></div>
    176. 

  176. <div class="line"><a name="l00103"></a><span class="lineno"><a class="line" href="census_8h.html#a487ca94a4b349f1a7d3d28a21b154f4e">  103</a></span>&#160;<span class="preprocessor">#define CENSUS_MAX_PROPAGATED_TAGS 255</span></div>
    177. 

  177. <div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;<span class="preprocessor"></span></div>
    178. 

  178. <div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;<span class="comment">/* Tag flags. */</span></div>
    179. 

  179. <div class="line"><a name="l00106"></a><span class="lineno"><a class="line" href="census_8h.html#ac116a5843bd29f43a949c56ef5ae619a">  106</a></span>&#160;<span class="preprocessor">#define CENSUS_TAG_PROPAGATE 1 </span><span class="comment">/* Tag should be propagated over RPC */</span><span class="preprocessor"></span></div>
    180. 

  180. <div class="line"><a name="l00107"></a><span class="lineno"><a class="line" href="census_8h.html#ab3c3a66a8c2f392d4a14e75dc44e8931">  107</a></span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define CENSUS_TAG_STATS 2     </span><span class="comment">/* Tag will be used for statistics aggregation */</span><span class="preprocessor"></span></div>
    181. 

  181. <div class="line"><a name="l00108"></a><span class="lineno"><a class="line" href="census_8h.html#a070dd8c57a1a31ced0c7ead5a5910df7">  108</a></span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define CENSUS_TAG_RESERVED 4  </span><span class="comment">/* Reserved for internal use. */</span><span class="preprocessor"></span></div>
    182. 

  182. <div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;<span class="preprocessor"></span><span class="comment">/* Flag values 4,8,16,32,64,128 are reserved for future/internal use. Clients</span></div>
    183. 

  183. <div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;<span class="comment">   should not use or rely on their values. */</span></div>
    184. 

  184. <div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;</div>
    185. 

  185. <div class="line"><a name="l00112"></a><span class="lineno"><a class="line" href="census_8h.html#afa3a818c132d55bb1f0afb7442d8f848">  112</a></span>&#160;<span class="preprocessor">#define CENSUS_TAG_IS_PROPAGATED(flags) (flags &amp; CENSUS_TAG_PROPAGATE)</span></div>
    186. 

  186. <div class="line"><a name="l00113"></a><span class="lineno"><a class="line" href="census_8h.html#aaca94b54b685c481236dfb913fef8b4c">  113</a></span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define CENSUS_TAG_IS_STATS(flags) (flags &amp; CENSUS_TAG_STATS)</span></div>
    187. 

  187. <div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;<span class="preprocessor"></span></div>
    188. 

  188. <div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;<span class="comment">/* An instance of this structure is kept by every context, and records the</span></div>
    189. 

  189. <div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;<span class="comment">   basic information associated with the creation of that context. */</span></div>
    190. 

  190. <div class="line"><a name="l00117"></a><span class="lineno"><a class="line" href="structcensus__context__status.html">  117</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span>{</div>
    191. 

  191. <div class="line"><a name="l00118"></a><span class="lineno"><a class="line" href="structcensus__context__status.html#a829f2aeabdea60d613e4fed1be3d6041">  118</a></span>&#160;  <span class="keywordtype">int</span> <a class="code" href="structcensus__context__status.html#a829f2aeabdea60d613e4fed1be3d6041">n_propagated_tags</a>; <span class="comment">/* number of propagated tags */</span></div>
    192. 

  192. <div class="line"><a name="l00119"></a><span class="lineno"><a class="line" href="structcensus__context__status.html#a94be33aaa92817f62516bb21fb106e00">  119</a></span>&#160;  <span class="keywordtype">int</span> <a class="code" href="structcensus__context__status.html#a94be33aaa92817f62516bb21fb106e00">n_local_tags</a>;      <span class="comment">/* number of non-propagated (local) tags */</span></div>
    193. 

  193. <div class="line"><a name="l00120"></a><span class="lineno"><a class="line" href="structcensus__context__status.html#a8e7c9b97dceabe04d9d7b54ca1259d39">  120</a></span>&#160;  <span class="keywordtype">int</span> <a class="code" href="structcensus__context__status.html#a8e7c9b97dceabe04d9d7b54ca1259d39">n_deleted_tags</a>;    <span class="comment">/* number of tags that were deleted */</span></div>
    194. 

  194. <div class="line"><a name="l00121"></a><span class="lineno"><a class="line" href="structcensus__context__status.html#ad44570570f170577c7fec0381adea3d5">  121</a></span>&#160;  <span class="keywordtype">int</span> <a class="code" href="structcensus__context__status.html#ad44570570f170577c7fec0381adea3d5">n_added_tags</a>;      <span class="comment">/* number of tags that were added */</span></div>
    195. 

  195. <div class="line"><a name="l00122"></a><span class="lineno"><a class="line" href="structcensus__context__status.html#a4f2fbaa6bfdadc681a74e6fd947f6e7e">  122</a></span>&#160;  <span class="keywordtype">int</span> <a class="code" href="structcensus__context__status.html#a4f2fbaa6bfdadc681a74e6fd947f6e7e">n_modified_tags</a>;   <span class="comment">/* number of tags that were modified */</span></div>
    196. 

  196. <div class="line"><a name="l00123"></a><span class="lineno"><a class="line" href="structcensus__context__status.html#a00dd3c6cfa7338d539b290f34b29523b">  123</a></span>&#160;  <span class="keywordtype">int</span> <a class="code" href="structcensus__context__status.html#a00dd3c6cfa7338d539b290f34b29523b">n_invalid_tags</a>;    <span class="comment">/* number of tags with bad keys or values (e.g.</span></div>
    197. 

  197. <div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;<span class="comment">                            longer than CENSUS_MAX_TAG_KV_LEN) */</span></div>
    198. 

  198. <div class="line"><a name="l00125"></a><span class="lineno"><a class="line" href="structcensus__context__status.html#ab567b892584772dcb4a13ae7c8b95316">  125</a></span>&#160;  <span class="keywordtype">int</span> <a class="code" href="structcensus__context__status.html#ab567b892584772dcb4a13ae7c8b95316">n_ignored_tags</a>;    <span class="comment">/* number of tags ignored because of</span></div>
    199. 

  199. <div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;<span class="comment">                            CENSUS_MAX_PROPAGATED_TAGS limit. */</span></div>
    200. 

  200. <div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;} <a class="code" href="structcensus__context__status.html">census_context_status</a>;</div>
    201. 

  201. <div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;</div>
    202. 

  202. <div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;<span class="comment">/* Create a new context, adding and removing tags from an existing context.</span></div>
    203. 

  203. <div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;<span class="comment">   This will copy all tags from the &#39;tags&#39; input, so it is recommended</span></div>
    204. 

  204. <div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;<span class="comment">   to add as many tags in a single operation as is practical for the client.</span></div>
    205. 

  205. <div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;<span class="comment">   @param base Base context to build upon. Can be NULL.</span></div>
    206. 

  206. <div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;<span class="comment">   @param tags A set of tags to be added/changed/deleted. Tags with keys that</span></div>
    207. 

  207. <div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;<span class="comment">   are in &#39;tags&#39;, but not &#39;base&#39;, are added to the context. Keys that are in</span></div>
    208. 

  208. <div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;<span class="comment">   both &#39;tags&#39; and &#39;base&#39; will have their value/flags modified. Tags with keys</span></div>
    209. 

  209. <div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;<span class="comment">   in both, but with NULL values, will be deleted from the context. Tags with</span></div>
    210. 

  210. <div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;<span class="comment">   invalid (too long or short) keys or values will be ignored.</span></div>
    211. 

  211. <div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;<span class="comment">   If adding a tag will result in more than CENSUS_MAX_PROPAGATED_TAGS in either</span></div>
    212. 

  212. <div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;<span class="comment">   binary or non-binary tags, they will be ignored, as will deletions of</span></div>
    213. 

  213. <div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;<span class="comment">   tags that don&#39;t exist.</span></div>
    214. 

  214. <div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;<span class="comment">   @param ntags number of tags in &#39;tags&#39;</span></div>
    215. 

  215. <div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;<span class="comment">   @param status If not NULL, will return a pointer to a census_context_status</span></div>
    216. 

  216. <div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;<span class="comment">   structure containing information about the new context and status of the</span></div>
    217. 

  217. <div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;<span class="comment">   tags used in its creation.</span></div>
    218. 

  218. <div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;<span class="comment">   @return A new, valid census_context.</span></div>
    219. 

  219. <div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;<span class="comment">*/</span></div>
    220. 

  220. <div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *<a class="code" href="census_8h.html#a63289de665c241f31e9c32666310ec3a">census_context_create</a>(</div>
    221. 

  221. <div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;    <span class="keyword">const</span> <a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *base, <span class="keyword">const</span> <a class="code" href="structcensus__tag.html">census_tag</a> *tags, <span class="keywordtype">int</span> ntags,</div>
    222. 

  222. <div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;    <a class="code" href="structcensus__context__status.html">census_context_status</a> <span class="keyword">const</span> **status);</div>
    223. 

  223. <div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;</div>
    224. 

  224. <div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;<span class="comment">/* Destroy a context. Once this function has been called, the context cannot</span></div>
    225. 

  225. <div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;<span class="comment">   be reused. */</span></div>
    226. 

  226. <div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">void</span> <a class="code" href="census_8h.html#a6e29f72138aac3eac75ef13a7bd25560">census_context_destroy</a>(<a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context);</div>
    227. 

  227. <div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;</div>
    228. 

  228. <div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;<span class="comment">/* Get a pointer to the original status from the context creation. */</span></div>
    229. 

  229. <div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keyword">const</span> <a class="code" href="structcensus__context__status.html">census_context_status</a> *<a class="code" href="census_8h.html#a12077dda197a10bf2198203eac1a348a">census_context_get_status</a>(</div>
    230. 

  230. <div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;    <span class="keyword">const</span> <a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context);</div>
    231. 

  231. <div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;</div>
    232. 

  232. <div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;<span class="comment">/* Structure used for iterating over the tags in a context. API clients should</span></div>
    233. 

  233. <div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;<span class="comment">   not use or reference internal fields - neither their contents or</span></div>
    234. 

  234. <div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;<span class="comment">   presence/absence are guaranteed. */</span></div>
    235. 

  235. <div class="line"><a name="l00162"></a><span class="lineno"><a class="line" href="structcensus__context__iterator.html">  162</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span>{</div>
    236. 

  236. <div class="line"><a name="l00163"></a><span class="lineno"><a class="line" href="structcensus__context__iterator.html#a729daa66104d74f11aa6c5b25c27f563">  163</a></span>&#160;  <span class="keyword">const</span> <a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *<a class="code" href="structcensus__context__iterator.html#a729daa66104d74f11aa6c5b25c27f563">context</a>;</div>
    237. 

  237. <div class="line"><a name="l00164"></a><span class="lineno"><a class="line" href="structcensus__context__iterator.html#ab591e487d86084f6e73c79c82bc3b1bc">  164</a></span>&#160;  <span class="keywordtype">int</span> <a class="code" href="structcensus__context__iterator.html#ab591e487d86084f6e73c79c82bc3b1bc">base</a>;</div>
    238. 

  238. <div class="line"><a name="l00165"></a><span class="lineno"><a class="line" href="structcensus__context__iterator.html#a1d3bd63edb21b2c2692610f9440b0111">  165</a></span>&#160;  <span class="keywordtype">int</span> <a class="code" href="structcensus__context__iterator.html#a1d3bd63edb21b2c2692610f9440b0111">index</a>;</div>
    239. 

  239. <div class="line"><a name="l00166"></a><span class="lineno"><a class="line" href="structcensus__context__iterator.html#ad565429de91ad3f42c6e7091c2532804">  166</a></span>&#160;  <span class="keywordtype">char</span> *<a class="code" href="structcensus__context__iterator.html#ad565429de91ad3f42c6e7091c2532804">kvm</a>;</div>
    240. 

  240. <div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;} <a class="code" href="structcensus__context__iterator.html">census_context_iterator</a>;</div>
    241. 

  241. <div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;</div>
    242. 

  242. <div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;<span class="comment">/* Initialize a census_tag_iterator. Must be called before first use. */</span></div>
    243. 

  243. <div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">void</span> <a class="code" href="census_8h.html#ac19f91fc3442073217752ce4abf5dfc4">census_context_initialize_iterator</a>(</div>
    244. 

  244. <div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;    <span class="keyword">const</span> <a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context, <a class="code" href="structcensus__context__iterator.html">census_context_iterator</a> *iterator);</div>
    245. 

  245. <div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;</div>
    246. 

  246. <div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;<span class="comment">/* Get the contents of the &quot;next&quot; tag in the context. If there are no more</span></div>
    247. 

  247. <div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;<span class="comment">   tags, returns 0 (and &#39;tag&#39; contents will be unchanged), otherwise returns 1.</span></div>
    248. 

  248. <div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;<span class="comment">   */</span></div>
    249. 

  249. <div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">int</span> <a class="code" href="census_8h.html#a756d86b68b73a9ad9dacdfdaeb2a865c">census_context_next_tag</a>(<a class="code" href="structcensus__context__iterator.html">census_context_iterator</a> *iterator,</div>
    250. 

  250. <div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;                                      <a class="code" href="structcensus__tag.html">census_tag</a> *tag);</div>
    251. 

  251. <div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;</div>
    252. 

  252. <div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;<span class="comment">/* Get a context tag by key. Returns 0 if the key is not present. */</span></div>
    253. 

  253. <div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">int</span> <a class="code" href="census_8h.html#a610c654980b00da26ed7b2becca79f94">census_context_get_tag</a>(<span class="keyword">const</span> <a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context,</div>
    254. 

  254. <div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;                                     <span class="keyword">const</span> <span class="keywordtype">char</span> *key, <a class="code" href="structcensus__tag.html">census_tag</a> *tag);</div>
    255. 

  255. <div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;</div>
    256. 

  256. <div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;<span class="comment">/* Tag set encode/decode functionality. These functions are intended</span></div>
    257. 

  257. <div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;<span class="comment">   for use by RPC systems only, for purposes of transmitting/receiving contexts.</span></div>
    258. 

  258. <div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;<span class="comment">   */</span></div>
    259. 

  259. <div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;</div>
    260. 

  260. <div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;<span class="comment">/* Encode a context into a buffer.</span></div>
    261. 

  261. <div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;<span class="comment">   @param context context to be encoded</span></div>
    262. 

  262. <div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;<span class="comment">   @param buffer buffer into which the context will be encoded.</span></div>
    263. 

  263. <div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;<span class="comment">   @param buf_size number of available bytes in buffer.</span></div>
    264. 

  264. <div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;<span class="comment">   @return The number of buffer bytes consumed for the encoded context, or</span></div>
    265. 

  265. <div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;<span class="comment">           zero if the buffer was of insufficient size. */</span></div>
    266. 

  266. <div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">size_t</span> <a class="code" href="census_8h.html#a054424f7ca74d513c4dba55dd20d92f2">census_context_encode</a>(<span class="keyword">const</span> <a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context,</div>
    267. 

  267. <div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;                                       <span class="keywordtype">char</span> *buffer, <span class="keywordtype">size_t</span> buf_size);</div>
    268. 

  268. <div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;</div>
    269. 

  269. <div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;<span class="comment">/* Decode context buffer encoded with census_context_encode(). Returns NULL</span></div>
    270. 

  270. <div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;<span class="comment">   if there is an error in parsing either buffer. */</span></div>
    271. 

  271. <div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *<a class="code" href="census_8h.html#aaccea127635aaf9200e776eff7c7ba5d">census_context_decode</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *buffer,</div>
    272. 

  272. <div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;                                                <span class="keywordtype">size_t</span> size);</div>
    273. 

  273. <div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;</div>
    274. 

  274. <div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;<span class="comment">/* Distributed traces can have a number of options. */</span></div>
    275. 

  275. <div class="line"><a name="l00202"></a><span class="lineno"><a class="line" href="census_8h.html#ad4ff7b1db813ee5318871121bb4281cc">  202</a></span>&#160;<span class="keyword">enum</span> <a class="code" href="census_8h.html#ad4ff7b1db813ee5318871121bb4281cc">census_trace_mask_values</a> {</div>
    276. 

  276. <div class="line"><a name="l00203"></a><span class="lineno"><a class="line" href="census_8h.html#ad4ff7b1db813ee5318871121bb4281cca21afa23a531e5d54e70d44ec3c18cfb3">  203</a></span>&#160;  <a class="code" href="census_8h.html#ad4ff7b1db813ee5318871121bb4281cca21afa23a531e5d54e70d44ec3c18cfb3">CENSUS_TRACE_MASK_NONE</a> = 0,      <span class="comment">/* Default, empty flags */</span></div>
    277. 

  277. <div class="line"><a name="l00204"></a><span class="lineno"><a class="line" href="census_8h.html#ad4ff7b1db813ee5318871121bb4281ccaadcf28b76de06181051506c96996255a">  204</a></span>&#160;  <a class="code" href="census_8h.html#ad4ff7b1db813ee5318871121bb4281ccaadcf28b76de06181051506c96996255a">CENSUS_TRACE_MASK_IS_SAMPLED</a> = 1 <span class="comment">/* RPC tracing enabled for this context. */</span></div>
    278. 

  278. <div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;};</div>
    279. 

  279. <div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;</div>
    280. 

  280. <div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">int</span> <a class="code" href="census_8h.html#a2a2dfc973cd259d93b0901c8b32e8f34">census_trace_mask</a>(<span class="keyword">const</span> <a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context);</div>
    281. 

  281. <div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;</div>
    282. 

  282. <div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">void</span> <a class="code" href="census_8h.html#a2088bf00a48a7a9b0a6e659fa5161ef9">census_set_trace_mask</a>(<span class="keywordtype">int</span> trace_mask);</div>
    283. 

  283. <div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;</div>
    284. 

  284. <div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;<span class="comment">/* The concept of &quot;operation&quot; is a fundamental concept for Census. In an RPC</span></div>
    285. 

  285. <div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;<span class="comment">   system, an operation typically represents a single RPC, or a significant</span></div>
    286. 

  286. <div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;<span class="comment">   sub-part thereof (e.g. a single logical &quot;read&quot; RPC to a distributed storage</span></div>
    287. 

  287. <div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;<span class="comment">   system might do several other actions in parallel, from looking up metadata</span></div>
    288. 

  288. <div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;<span class="comment">   indices to making requests of other services - each of these could be a</span></div>
    289. 

  289. <div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;<span class="comment">   sub-operation with the larger RPC operation). Census uses operations for the</span></div>
    290. 

  290. <div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;<span class="comment">   following:</span></div>
    291. 

  291. <div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;<span class="comment"></span></div>
    292. 

  292. <div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;<span class="comment">   CPU accounting: If enabled, census will measure the thread CPU time</span></div>
    293. 

  293. <div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;<span class="comment">   consumed between operation start and end times.</span></div>
    294. 

  294. <div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;<span class="comment"></span></div>
    295. 

  295. <div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;<span class="comment">   Active operations: Census will maintain information on all currently</span></div>
    296. 

  296. <div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;<span class="comment">   active operations.</span></div>
    297. 

  297. <div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;<span class="comment"></span></div>
    298. 

  298. <div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;<span class="comment">   Distributed tracing: Each operation serves as a logical trace span.</span></div>
    299. 

  299. <div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;<span class="comment"></span></div>
    300. 

  300. <div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;<span class="comment">   Stats collection: Stats are broken down by operation (e.g. latency</span></div>
    301. 

  301. <div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;<span class="comment">   breakdown for each unique RPC path).</span></div>
    302. 

  302. <div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;<span class="comment"></span></div>
    303. 

  303. <div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;<span class="comment">   The following functions serve to delineate the start and stop points for</span></div>
    304. 

  304. <div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;<span class="comment">   each logical operation. */</span></div>
    305. 

  305. <div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;</div>
    306. 

  306. <div class="line"><a name="l00240"></a><span class="lineno"><a class="line" href="structcensus__timestamp.html">  240</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span>{</div>
    307. 

  307. <div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;  <span class="comment">/* Use gpr_timespec for default implementation. High performance</span></div>
    308. 

  308. <div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;<span class="comment">   * implementations should use a cycle-counter based timestamp. */</span></div>
    309. 

  309. <div class="line"><a name="l00243"></a><span class="lineno"><a class="line" href="structcensus__timestamp.html#a36ed36ffcf81f720bbdade460f957004">  243</a></span>&#160;  <a class="code" href="structgpr__timespec.html">gpr_timespec</a> <a class="code" href="structcensus__timestamp.html#a36ed36ffcf81f720bbdade460f957004">ts</a>;</div>
    310. 

  310. <div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;} <a class="code" href="structcensus__timestamp.html">census_timestamp</a>;</div>
    311. 

  311. <div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;</div>
    312. 

  312. <div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <a class="code" href="structcensus__timestamp.html">census_timestamp</a> <a class="code" href="census_8h.html#a57255eb87c6ade8ee6eb8856d3ecfc11">census_start_rpc_op_timestamp</a>(<span class="keywordtype">void</span>);</div>
    313. 

  313. <div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;</div>
    314. 

  314. <div class="line"><a name="l00273"></a><span class="lineno"><a class="line" href="structcensus__rpc__name__info.html">  273</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span>{</div>
    315. 

  315. <div class="line"><a name="l00274"></a><span class="lineno"><a class="line" href="structcensus__rpc__name__info.html#a97dbb444634b47e6eee7d4229c2c6e17">  274</a></span>&#160;  <span class="keyword">const</span> <span class="keywordtype">char</span> *(*get_rpc_service_name)(int64_t id);</div>
    316. 

  316. <div class="line"><a name="l00275"></a><span class="lineno"><a class="line" href="structcensus__rpc__name__info.html#a2c11e57832465057e8f803accfc6287a">  275</a></span>&#160;  <span class="keyword">const</span> <span class="keywordtype">char</span> *(*get_rpc_method_name)(int64_t id);</div>
    317. 

  317. <div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;} <a class="code" href="structcensus__rpc__name__info.html">census_rpc_name_info</a>;</div>
    318. 

  318. <div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;</div>
    319. 

  319. <div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *<a class="code" href="census_8h.html#abd6d5aa344819ec9d73c79b9fe6778dc">census_start_client_rpc_op</a>(</div>
    320. 

  320. <div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;    <span class="keyword">const</span> <a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context, int64_t rpc_name_id,</div>
    321. 

  321. <div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;    <span class="keyword">const</span> <a class="code" href="structcensus__rpc__name__info.html">census_rpc_name_info</a> *rpc_name_info, <span class="keyword">const</span> <span class="keywordtype">char</span> *peer, <span class="keywordtype">int</span> trace_mask,</div>
    322. 

  322. <div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;    <span class="keyword">const</span> <a class="code" href="structcensus__timestamp.html">census_timestamp</a> *start_time);</div>
    323. 

  323. <div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;</div>
    324. 

  324. <div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">void</span> <a class="code" href="census_8h.html#ab20a8e42995181004f5fbc9a87e339d3">census_set_rpc_client_peer</a>(<a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context,</div>
    325. 

  325. <div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;                                          <span class="keyword">const</span> <span class="keywordtype">char</span> *peer);</div>
    326. 

  326. <div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;</div>
    327. 

  327. <div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *<a class="code" href="census_8h.html#a18e3c1cddf38f66a5e8cbf79d7084369">census_start_server_rpc_op</a>(</div>
    328. 

  328. <div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">char</span> *buffer, int64_t rpc_name_id,</div>
    329. 

  329. <div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;    <span class="keyword">const</span> <a class="code" href="structcensus__rpc__name__info.html">census_rpc_name_info</a> *rpc_name_info, <span class="keyword">const</span> <span class="keywordtype">char</span> *peer, <span class="keywordtype">int</span> trace_mask,</div>
    330. 

  330. <div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;    <a class="code" href="structcensus__timestamp.html">census_timestamp</a> *start_time);</div>
    331. 

  331. <div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;</div>
    332. 

  332. <div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *<a class="code" href="census_8h.html#ae1536ef86b12a6904cb1de3a47f0ca1b">census_start_op</a>(<a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context,</div>
    333. 

  333. <div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;                                          <span class="keyword">const</span> <span class="keywordtype">char</span> *family, <span class="keyword">const</span> <span class="keywordtype">char</span> *name,</div>
    334. 

  334. <div class="line"><a name="l00373"></a><span class="lineno">  373</span>&#160;                                          <span class="keywordtype">int</span> trace_mask);</div>
    335. 

  335. <div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;</div>
    336. 

  336. <div class="line"><a name="l00384"></a><span class="lineno">  384</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">void</span> <a class="code" href="census_8h.html#aee31ac081d81e46746025b06071f1f0e">census_end_op</a>(<a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context, <span class="keywordtype">int</span> status);</div>
    337. 

  337. <div class="line"><a name="l00385"></a><span class="lineno">  385</span>&#160;</div>
    338. 

  338. <div class="line"><a name="l00386"></a><span class="lineno"><a class="line" href="census_8h.html#acb35403ed23ba2615457fabaa0b430e7">  386</a></span>&#160;<span class="preprocessor">#define CENSUS_TRACE_RECORD_START_OP ((uint32_t)0)</span></div>
    339. 

  339. <div class="line"><a name="l00387"></a><span class="lineno"><a class="line" href="census_8h.html#a003fb5bda98c95408a21d3a47571a1e9">  387</a></span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define CENSUS_TRACE_RECORD_END_OP ((uint32_t)1)</span></div>
    340. 

  340. <div class="line"><a name="l00388"></a><span class="lineno">  388</span>&#160;<span class="preprocessor"></span></div>
    341. 

  341. <div class="line"><a name="l00396"></a><span class="lineno">  396</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">void</span> <a class="code" href="census_8h.html#aacf722bf9259354d1ab7a81a6c2fd666">census_trace_print</a>(<a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context, uint32_t type,</div>
    342. 

  342. <div class="line"><a name="l00397"></a><span class="lineno">  397</span>&#160;                                  <span class="keyword">const</span> <span class="keywordtype">char</span> *buffer, <span class="keywordtype">size_t</span> n);</div>
    343. 

  343. <div class="line"><a name="l00398"></a><span class="lineno">  398</span>&#160;</div>
    344. 

  344. <div class="line"><a name="l00400"></a><span class="lineno"><a class="line" href="structcensus__trace__record.html">  400</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span>{</div>
    345. 

  345. <div class="line"><a name="l00401"></a><span class="lineno"><a class="line" href="structcensus__trace__record.html#ac7f74956d51898681b8e35a8031ac9fb">  401</a></span>&#160;  <a class="code" href="structcensus__timestamp.html">census_timestamp</a> <a class="code" href="structcensus__trace__record.html#ac7f74956d51898681b8e35a8031ac9fb">timestamp</a>; <span class="comment">/* Time of record creation */</span></div>
    346. 

  346. <div class="line"><a name="l00402"></a><span class="lineno"><a class="line" href="structcensus__trace__record.html#a69511d4d1ae8297580789786feb564d4">  402</a></span>&#160;  uint64_t <a class="code" href="structcensus__trace__record.html#a69511d4d1ae8297580789786feb564d4">trace_id</a>;          <span class="comment">/* Trace ID associated with record */</span></div>
    347. 

  347. <div class="line"><a name="l00403"></a><span class="lineno"><a class="line" href="structcensus__trace__record.html#a7a9ffdb2e91c34802e5102a1632b2e58">  403</a></span>&#160;  uint64_t <a class="code" href="structcensus__trace__record.html#a7a9ffdb2e91c34802e5102a1632b2e58">op_id</a>;             <span class="comment">/* Operation ID associated with record */</span></div>
    348. 

  348. <div class="line"><a name="l00404"></a><span class="lineno"><a class="line" href="structcensus__trace__record.html#a76b2b8a9206a720e02c32c13a534ba78">  404</a></span>&#160;  uint32_t <a class="code" href="structcensus__trace__record.html#a76b2b8a9206a720e02c32c13a534ba78">type</a>;              <span class="comment">/* Type (as used in census_trace_print() */</span></div>
    349. 

  349. <div class="line"><a name="l00405"></a><span class="lineno"><a class="line" href="structcensus__trace__record.html#a4ba324fb39273bf3c0c0f15852d9d130">  405</a></span>&#160;  <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="structcensus__trace__record.html#a4ba324fb39273bf3c0c0f15852d9d130">buffer</a>;         <span class="comment">/* Buffer (from census_trace_print() */</span></div>
    350. 

  350. <div class="line"><a name="l00406"></a><span class="lineno"><a class="line" href="structcensus__trace__record.html#abc4f9330e28d906f90346d7fd5769d53">  406</a></span>&#160;  <span class="keywordtype">size_t</span> <a class="code" href="structcensus__trace__record.html#abc4f9330e28d906f90346d7fd5769d53">buf_size</a>;            <span class="comment">/* Number of bytes inside buffer */</span></div>
    351. 

  351. <div class="line"><a name="l00407"></a><span class="lineno">  407</span>&#160;} <a class="code" href="structcensus__trace__record.html">census_trace_record</a>;</div>
    352. 

  352. <div class="line"><a name="l00408"></a><span class="lineno">  408</span>&#160;</div>
    353. 

  353. <div class="line"><a name="l00418"></a><span class="lineno">  418</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">int</span> <a class="code" href="census_8h.html#ad78c02761da0d8a7a70bf4add263f91f">census_trace_scan_start</a>(<span class="keywordtype">int</span> consume);</div>
    354. 

  354. <div class="line"><a name="l00419"></a><span class="lineno">  419</span>&#160;</div>
    355. 

  355. <div class="line"><a name="l00429"></a><span class="lineno">  429</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">int</span> <a class="code" href="census_8h.html#aeb5d22e80a87eabe9880f08c56e95bf1">census_get_trace_record</a>(<a class="code" href="structcensus__trace__record.html">census_trace_record</a> *trace_record);</div>
    356. 

  356. <div class="line"><a name="l00430"></a><span class="lineno">  430</span>&#160;</div>
    357. 

  357. <div class="line"><a name="l00432"></a><span class="lineno">  432</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">void</span> <a class="code" href="census_8h.html#a22eb7df4c9b232d8962592d738007ecb">census_trace_scan_end</a>();</div>
    358. 

  358. <div class="line"><a name="l00433"></a><span class="lineno">  433</span>&#160;</div>
    359. 

  359. <div class="line"><a name="l00434"></a><span class="lineno">  434</span>&#160;<span class="comment">/* Core stats collection API&#39;s. The following concepts are used:</span></div>
    360. 

  360. <div class="line"><a name="l00435"></a><span class="lineno">  435</span>&#160;<span class="comment">   * Resource: Users record measurements for a single resource. Examples</span></div>
    361. 

  361. <div class="line"><a name="l00436"></a><span class="lineno">  436</span>&#160;<span class="comment">     include RPC latency, CPU seconds consumed, and bytes transmitted.</span></div>
    362. 

  362. <div class="line"><a name="l00437"></a><span class="lineno">  437</span>&#160;<span class="comment">   * Aggregation: An aggregation of a set of measurements. Census supports the</span></div>
    363. 

  363. <div class="line"><a name="l00438"></a><span class="lineno">  438</span>&#160;<span class="comment">       following aggregation types:</span></div>
    364. 

  364. <div class="line"><a name="l00439"></a><span class="lineno">  439</span>&#160;<span class="comment">       * Distribution - statistical distribution information, used for</span></div>
    365. 

  365. <div class="line"><a name="l00440"></a><span class="lineno">  440</span>&#160;<span class="comment">         recording average, standard deviation etc. Can include a histogram.</span></div>
    366. 

  366. <div class="line"><a name="l00441"></a><span class="lineno">  441</span>&#160;<span class="comment">       * Interval - a count of events that happen in a rolling time window.</span></div>
    367. 

  367. <div class="line"><a name="l00442"></a><span class="lineno">  442</span>&#160;<span class="comment">   * View: A view is a combination of a Resource, a set of tag keys and an</span></div>
    368. 

  368. <div class="line"><a name="l00443"></a><span class="lineno">  443</span>&#160;<span class="comment">     Aggregation. When a measurement for a Resource matches the View tags, it is</span></div>
    369. 

  369. <div class="line"><a name="l00444"></a><span class="lineno">  444</span>&#160;<span class="comment">     recorded (for each unique set of tag values) using the Aggregation type.</span></div>
    370. 

  370. <div class="line"><a name="l00445"></a><span class="lineno">  445</span>&#160;<span class="comment">     Each resource can have an arbitrary number of views by which it will be</span></div>
    371. 

  371. <div class="line"><a name="l00446"></a><span class="lineno">  446</span>&#160;<span class="comment">     broken down.</span></div>
    372. 

  372. <div class="line"><a name="l00447"></a><span class="lineno">  447</span>&#160;<span class="comment"></span></div>
    373. 

  373. <div class="line"><a name="l00448"></a><span class="lineno">  448</span>&#160;<span class="comment">  Census uses protos to define each of the above, and output results. This</span></div>
    374. 

  374. <div class="line"><a name="l00449"></a><span class="lineno">  449</span>&#160;<span class="comment">  ensures unification across the different language and runtime</span></div>
    375. 

  375. <div class="line"><a name="l00450"></a><span class="lineno">  450</span>&#160;<span class="comment">  implementations. The proto definitions can be found in src/proto/census.</span></div>
    376. 

  376. <div class="line"><a name="l00451"></a><span class="lineno">  451</span>&#160;<span class="comment">*/</span></div>
    377. 

  377. <div class="line"><a name="l00452"></a><span class="lineno">  452</span>&#160;</div>
    378. 

  378. <div class="line"><a name="l00453"></a><span class="lineno">  453</span>&#160;<span class="comment">/* Define a new resource. `resource_pb` should contain an encoded Resource</span></div>
    379. 

  379. <div class="line"><a name="l00454"></a><span class="lineno">  454</span>&#160;<span class="comment">   protobuf, `resource_pb_size` being the size of the buffer. Returns a -ve</span></div>
    380. 

  380. <div class="line"><a name="l00455"></a><span class="lineno">  455</span>&#160;<span class="comment">   value on error, or a positive (&gt;= 0) resource id (for use in</span></div>
    381. 

  381. <div class="line"><a name="l00456"></a><span class="lineno">  456</span>&#160;<span class="comment">   census_delete_resource() and census_record_values()). In order to be valid, a</span></div>
    382. 

  382. <div class="line"><a name="l00457"></a><span class="lineno">  457</span>&#160;<span class="comment">   resource must have a name, and at least one numerator in its unit type. The</span></div>
    383. 

  383. <div class="line"><a name="l00458"></a><span class="lineno">  458</span>&#160;<span class="comment">   resource name must be unique, and an error will be returned if it is not. */</span></div>
    384. 

  384. <div class="line"><a name="l00459"></a><span class="lineno">  459</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> int32_t <a class="code" href="census_8h.html#a689ea02b5b0907f69ecb0baee371aa55">census_define_resource</a>(<span class="keyword">const</span> uint8_t *resource_pb,</div>
    385. 

  385. <div class="line"><a name="l00460"></a><span class="lineno">  460</span>&#160;                                         <span class="keywordtype">size_t</span> resource_pb_size);</div>
    386. 

  386. <div class="line"><a name="l00461"></a><span class="lineno">  461</span>&#160;</div>
    387. 

  387. <div class="line"><a name="l00462"></a><span class="lineno">  462</span>&#160;<span class="comment">/* Delete a resource created by census_define_resource(). */</span></div>
    388. 

  388. <div class="line"><a name="l00463"></a><span class="lineno">  463</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">void</span> <a class="code" href="census_8h.html#ac68fd1dbb1767d8e080ec22f4767be89">census_delete_resource</a>(int32_t resource_id);</div>
    389. 

  389. <div class="line"><a name="l00464"></a><span class="lineno">  464</span>&#160;</div>
    390. 

  390. <div class="line"><a name="l00465"></a><span class="lineno">  465</span>&#160;<span class="comment">/* Determine the id of a resource, given its name. returns -1 if the resource</span></div>
    391. 

  391. <div class="line"><a name="l00466"></a><span class="lineno">  466</span>&#160;<span class="comment">   does not exist. */</span></div>
    392. 

  392. <div class="line"><a name="l00467"></a><span class="lineno">  467</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> int32_t <a class="code" href="census_8h.html#aeb7f7e4f427236d00446d2eb836c5252">census_resource_id</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *name);</div>
    393. 

  393. <div class="line"><a name="l00468"></a><span class="lineno">  468</span>&#160;</div>
    394. 

  394. <div class="line"><a name="l00469"></a><span class="lineno">  469</span>&#160;<span class="comment">/* A single value to be recorded comprises two parts: an ID for the particular</span></div>
    395. 

  395. <div class="line"><a name="l00470"></a><span class="lineno">  470</span>&#160;<span class="comment"> * resource and the value to be recorded against it. */</span></div>
    396. 

  396. <div class="line"><a name="l00471"></a><span class="lineno"><a class="line" href="structcensus__value.html">  471</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span>{</div>
    397. 

  397. <div class="line"><a name="l00472"></a><span class="lineno"><a class="line" href="structcensus__value.html#a620346f6dc4b26552fc149cfe5fd26aa">  472</a></span>&#160;  int32_t <a class="code" href="structcensus__value.html#a620346f6dc4b26552fc149cfe5fd26aa">resource_id</a>;</div>
    398. 

  398. <div class="line"><a name="l00473"></a><span class="lineno"><a class="line" href="structcensus__value.html#a5bff69239476e80fc5c54f3302fffa34">  473</a></span>&#160;  <span class="keywordtype">double</span> <a class="code" href="structcensus__value.html#a5bff69239476e80fc5c54f3302fffa34">value</a>;</div>
    399. 

  399. <div class="line"><a name="l00474"></a><span class="lineno">  474</span>&#160;} <a class="code" href="structcensus__value.html">census_value</a>;</div>
    400. 

  400. <div class="line"><a name="l00475"></a><span class="lineno">  475</span>&#160;</div>
    401. 

  401. <div class="line"><a name="l00476"></a><span class="lineno">  476</span>&#160;<span class="comment">/* Record new usage values against the given context. */</span></div>
    402. 

  402. <div class="line"><a name="l00477"></a><span class="lineno">  477</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a> <span class="keywordtype">void</span> <a class="code" href="census_8h.html#a26acfcba7f6b3f2b86d0a7fdc45e32ba">census_record_values</a>(<a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context,</div>
    403. 

  403. <div class="line"><a name="l00478"></a><span class="lineno">  478</span>&#160;                                    <a class="code" href="structcensus__value.html">census_value</a> *values, <span class="keywordtype">size_t</span> nvalues);</div>
    404. 

  404. <div class="line"><a name="l00479"></a><span class="lineno">  479</span>&#160;</div>
    405. 

  405. <div class="line"><a name="l00480"></a><span class="lineno">  480</span>&#160;<span class="preprocessor">#ifdef __cplusplus</span></div>
    406. 

  406. <div class="line"><a name="l00481"></a><span class="lineno">  481</span>&#160;<span class="preprocessor"></span>}</div>
    407. 

  407. <div class="line"><a name="l00482"></a><span class="lineno">  482</span>&#160;<span class="preprocessor">#endif</span></div>
    408. 

  408. <div class="line"><a name="l00483"></a><span class="lineno">  483</span>&#160;<span class="preprocessor"></span></div>
    409. 

  409. <div class="line"><a name="l00484"></a><span class="lineno">  484</span>&#160;<span class="preprocessor">#endif </span><span class="comment">/* GRPC_CENSUS_H */</span><span class="preprocessor"></span></div>
    410. 

  410. <div class="ttc" id="structcensus__context__status_html_a4f2fbaa6bfdadc681a74e6fd947f6e7e"><div class="ttname"><a href="structcensus__context__status.html#a4f2fbaa6bfdadc681a74e6fd947f6e7e">census_context_status::n_modified_tags</a></div><div class="ttdeci">int n_modified_tags</div><div class="ttdef"><b>Definition:</b> census.h:122</div></div>
    411. 

  411. <div class="ttc" id="census_8h_html_a6964222b3c20833883d7d05ab6b6e67e"><div class="ttname"><a href="census_8h.html#a6964222b3c20833883d7d05ab6b6e67e">census_enabled</a></div><div class="ttdeci">CENSUSAPI int census_enabled(void)</div><div class="ttdoc">Return the census features currently enabled. </div></div>
    412. 

  412. <div class="ttc" id="structcensus__context__status_html_a829f2aeabdea60d613e4fed1be3d6041"><div class="ttname"><a href="structcensus__context__status.html#a829f2aeabdea60d613e4fed1be3d6041">census_context_status::n_propagated_tags</a></div><div class="ttdeci">int n_propagated_tags</div><div class="ttdef"><b>Definition:</b> census.h:118</div></div>
    413. 

  413. <div class="ttc" id="census_8h_html_a18e3c1cddf38f66a5e8cbf79d7084369"><div class="ttname"><a href="census_8h.html#a18e3c1cddf38f66a5e8cbf79d7084369">census_start_server_rpc_op</a></div><div class="ttdeci">CENSUSAPI census_context * census_start_server_rpc_op(const char *buffer, int64_t rpc_name_id, const census_rpc_name_info *rpc_name_info, const char *peer, int trace_mask, census_timestamp *start_time)</div><div class="ttdoc">Start a server RPC operation. </div></div>
    414. 

  414. <div class="ttc" id="structcensus__value_html"><div class="ttname"><a href="structcensus__value.html">census_value</a></div><div class="ttdef"><b>Definition:</b> census.h:471</div></div>
    415. 

  415. <div class="ttc" id="structcensus__value_html_a5bff69239476e80fc5c54f3302fffa34"><div class="ttname"><a href="structcensus__value.html#a5bff69239476e80fc5c54f3302fffa34">census_value::value</a></div><div class="ttdeci">double value</div><div class="ttdef"><b>Definition:</b> census.h:473</div></div>
    416. 

  416. <div class="ttc" id="structcensus__value_html_a620346f6dc4b26552fc149cfe5fd26aa"><div class="ttname"><a href="structcensus__value.html#a620346f6dc4b26552fc149cfe5fd26aa">census_value::resource_id</a></div><div class="ttdeci">int32_t resource_id</div><div class="ttdef"><b>Definition:</b> census.h:472</div></div>
    417. 

  417. <div class="ttc" id="structcensus__context__status_html"><div class="ttname"><a href="structcensus__context__status.html">census_context_status</a></div><div class="ttdef"><b>Definition:</b> census.h:117</div></div>
    418. 

  418. <div class="ttc" id="census_8h_html_a12077dda197a10bf2198203eac1a348a"><div class="ttname"><a href="census_8h.html#a12077dda197a10bf2198203eac1a348a">census_context_get_status</a></div><div class="ttdeci">CENSUSAPI const census_context_status * census_context_get_status(const census_context *context)</div></div>
    419. 

  419. <div class="ttc" id="structcensus__context__status_html_ad44570570f170577c7fec0381adea3d5"><div class="ttname"><a href="structcensus__context__status.html#ad44570570f170577c7fec0381adea3d5">census_context_status::n_added_tags</a></div><div class="ttdeci">int n_added_tags</div><div class="ttdef"><b>Definition:</b> census.h:121</div></div>
    420. 

  420. <div class="ttc" id="census_8h_html_abe92e59c22481b0de3742673cbbb1bf8ab0722326e730113d5be97f643c3e6718"><div class="ttname"><a href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8ab0722326e730113d5be97f643c3e6718">CENSUS_FEATURE_TRACING</a></div><div class="ttdef"><b>Definition:</b> census.h:50</div></div>
    421. 

  421. <div class="ttc" id="census_8h_html_a610c654980b00da26ed7b2becca79f94"><div class="ttname"><a href="census_8h.html#a610c654980b00da26ed7b2becca79f94">census_context_get_tag</a></div><div class="ttdeci">CENSUSAPI int census_context_get_tag(const census_context *context, const char *key, census_tag *tag)</div></div>
    422. 

  422. <div class="ttc" id="census_8h_html_a2a2dfc973cd259d93b0901c8b32e8f34"><div class="ttname"><a href="census_8h.html#a2a2dfc973cd259d93b0901c8b32e8f34">census_trace_mask</a></div><div class="ttdeci">CENSUSAPI int census_trace_mask(const census_context *context)</div><div class="ttdoc">Get the current trace mask associated with this context. </div></div>
    423. 

  423. <div class="ttc" id="census_8h_html_a26acfcba7f6b3f2b86d0a7fdc45e32ba"><div class="ttname"><a href="census_8h.html#a26acfcba7f6b3f2b86d0a7fdc45e32ba">census_record_values</a></div><div class="ttdeci">CENSUSAPI void census_record_values(census_context *context, census_value *values, size_t nvalues)</div></div>
    424. 

  424. <div class="ttc" id="structcensus__context__status_html_a8e7c9b97dceabe04d9d7b54ca1259d39"><div class="ttname"><a href="structcensus__context__status.html#a8e7c9b97dceabe04d9d7b54ca1259d39">census_context_status::n_deleted_tags</a></div><div class="ttdeci">int n_deleted_tags</div><div class="ttdef"><b>Definition:</b> census.h:120</div></div>
    425. 

  425. <div class="ttc" id="structcensus__context__status_html_a00dd3c6cfa7338d539b290f34b29523b"><div class="ttname"><a href="structcensus__context__status.html#a00dd3c6cfa7338d539b290f34b29523b">census_context_status::n_invalid_tags</a></div><div class="ttdeci">int n_invalid_tags</div><div class="ttdef"><b>Definition:</b> census.h:123</div></div>
    426. 

  426. <div class="ttc" id="census_8h_html_abe92e59c22481b0de3742673cbbb1bf8a4808bff624e2377596b86a6f58ab04b5"><div class="ttname"><a href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8a4808bff624e2377596b86a6f58ab04b5">CENSUS_FEATURE_CPU</a></div><div class="ttdef"><b>Definition:</b> census.h:52</div></div>
    427. 

  427. <div class="ttc" id="structcensus__trace__record_html"><div class="ttname"><a href="structcensus__trace__record.html">census_trace_record</a></div><div class="ttdoc">Trace record. </div><div class="ttdef"><b>Definition:</b> census.h:400</div></div>
    428. 

  428. <div class="ttc" id="census_8h_html_aacf722bf9259354d1ab7a81a6c2fd666"><div class="ttname"><a href="census_8h.html#aacf722bf9259354d1ab7a81a6c2fd666">census_trace_print</a></div><div class="ttdeci">CENSUSAPI void census_trace_print(census_context *context, uint32_t type, const char *buffer, size_t n)</div><div class="ttdoc">Insert a trace record into the trace stream. </div></div>
    429. 

  429. <div class="ttc" id="census_8h_html_ad4ff7b1db813ee5318871121bb4281cc"><div class="ttname"><a href="census_8h.html#ad4ff7b1db813ee5318871121bb4281cc">census_trace_mask_values</a></div><div class="ttdeci">census_trace_mask_values</div><div class="ttdef"><b>Definition:</b> census.h:202</div></div>
    430. 

  430. <div class="ttc" id="structcensus__tag_html_a5632d4c8316fb17bbb3af5cb9b0dd4f5"><div class="ttname"><a href="structcensus__tag.html#a5632d4c8316fb17bbb3af5cb9b0dd4f5">census_tag::flags</a></div><div class="ttdeci">uint8_t flags</div><div class="ttdef"><b>Definition:</b> census.h:97</div></div>
    431. 

  431. <div class="ttc" id="structcensus__rpc__name__info_html"><div class="ttname"><a href="structcensus__rpc__name__info.html">census_rpc_name_info</a></div><div class="ttdoc">Represent functions to map RPC name ID to service/method names. </div><div class="ttdef"><b>Definition:</b> census.h:273</div></div>
    432. 

  432. <div class="ttc" id="census_8h_html_abe92e59c22481b0de3742673cbbb1bf8aba96a94fb7af8cf1144ca14edc0b1f0c"><div class="ttname"><a href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8aba96a94fb7af8cf1144ca14edc0b1f0c">CENSUS_FEATURE_ALL</a></div><div class="ttdef"><b>Definition:</b> census.h:53</div></div>
    433. 

  433. <div class="ttc" id="structcensus__trace__record_html_a7a9ffdb2e91c34802e5102a1632b2e58"><div class="ttname"><a href="structcensus__trace__record.html#a7a9ffdb2e91c34802e5102a1632b2e58">census_trace_record::op_id</a></div><div class="ttdeci">uint64_t op_id</div><div class="ttdef"><b>Definition:</b> census.h:403</div></div>
    434. 

  434. <div class="ttc" id="census_8h_html_abe92e59c22481b0de3742673cbbb1bf8a84c772b868e53ee3487c7bfc8e8b2f1a"><div class="ttname"><a href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8a84c772b868e53ee3487c7bfc8e8b2f1a">CENSUS_FEATURE_STATS</a></div><div class="ttdef"><b>Definition:</b> census.h:51</div></div>
    435. 

  435. <div class="ttc" id="census_8h_html_a63289de665c241f31e9c32666310ec3a"><div class="ttname"><a href="census_8h.html#a63289de665c241f31e9c32666310ec3a">census_context_create</a></div><div class="ttdeci">CENSUSAPI census_context * census_context_create(const census_context *base, const census_tag *tags, int ntags, census_context_status const **status)</div></div>
    436. 

  436. <div class="ttc" id="census_8h_html_ae1536ef86b12a6904cb1de3a47f0ca1b"><div class="ttname"><a href="census_8h.html#ae1536ef86b12a6904cb1de3a47f0ca1b">census_start_op</a></div><div class="ttdeci">CENSUSAPI census_context * census_start_op(census_context *context, const char *family, const char *name, int trace_mask)</div><div class="ttdoc">Start a new, non-RPC operation. </div></div>
    437. 

  437. <div class="ttc" id="census_8h_html_ad78c02761da0d8a7a70bf4add263f91f"><div class="ttname"><a href="census_8h.html#ad78c02761da0d8a7a70bf4add263f91f">census_trace_scan_start</a></div><div class="ttdeci">CENSUSAPI int census_trace_scan_start(int consume)</div><div class="ttdoc">Start a scan of existing trace records. </div></div>
    438. 

  438. <div class="ttc" id="structcensus__context__status_html_a94be33aaa92817f62516bb21fb106e00"><div class="ttname"><a href="structcensus__context__status.html#a94be33aaa92817f62516bb21fb106e00">census_context_status::n_local_tags</a></div><div class="ttdeci">int n_local_tags</div><div class="ttdef"><b>Definition:</b> census.h:119</div></div>
    439. 

  439. <div class="ttc" id="structcensus__context__status_html_ab567b892584772dcb4a13ae7c8b95316"><div class="ttname"><a href="structcensus__context__status.html#ab567b892584772dcb4a13ae7c8b95316">census_context_status::n_ignored_tags</a></div><div class="ttdeci">int n_ignored_tags</div><div class="ttdef"><b>Definition:</b> census.h:125</div></div>
    440. 

  440. <div class="ttc" id="census_8h_html_ad21073b22ae5c30cad63a29340f54048"><div class="ttname"><a href="census_8h.html#ad21073b22ae5c30cad63a29340f54048">census_shutdown</a></div><div class="ttdeci">CENSUSAPI void census_shutdown(void)</div></div>
    441. 

  441. <div class="ttc" id="census_8h_html_a22eb7df4c9b232d8962592d738007ecb"><div class="ttname"><a href="census_8h.html#a22eb7df4c9b232d8962592d738007ecb">census_trace_scan_end</a></div><div class="ttdeci">CENSUSAPI void census_trace_scan_end()</div><div class="ttdoc">End a scan previously started by census_trace_scan_start() </div></div>
    442. 

  442. <div class="ttc" id="structcensus__context__iterator_html_ad565429de91ad3f42c6e7091c2532804"><div class="ttname"><a href="structcensus__context__iterator.html#ad565429de91ad3f42c6e7091c2532804">census_context_iterator::kvm</a></div><div class="ttdeci">char * kvm</div><div class="ttdef"><b>Definition:</b> census.h:166</div></div>
    443. 

  443. <div class="ttc" id="census_8h_html_a6e29f72138aac3eac75ef13a7bd25560"><div class="ttname"><a href="census_8h.html#a6e29f72138aac3eac75ef13a7bd25560">census_context_destroy</a></div><div class="ttdeci">CENSUSAPI void census_context_destroy(census_context *context)</div></div>
    444. 

  444. <div class="ttc" id="census_8h_html_a054424f7ca74d513c4dba55dd20d92f2"><div class="ttname"><a href="census_8h.html#a054424f7ca74d513c4dba55dd20d92f2">census_context_encode</a></div><div class="ttdeci">CENSUSAPI size_t census_context_encode(const census_context *context, char *buffer, size_t buf_size)</div></div>
    445. 

  445. <div class="ttc" id="structcensus__trace__record_html_ac7f74956d51898681b8e35a8031ac9fb"><div class="ttname"><a href="structcensus__trace__record.html#ac7f74956d51898681b8e35a8031ac9fb">census_trace_record::timestamp</a></div><div class="ttdeci">census_timestamp timestamp</div><div class="ttdef"><b>Definition:</b> census.h:401</div></div>
    446. 

  446. <div class="ttc" id="structcensus__timestamp_html_a36ed36ffcf81f720bbdade460f957004"><div class="ttname"><a href="structcensus__timestamp.html#a36ed36ffcf81f720bbdade460f957004">census_timestamp::ts</a></div><div class="ttdeci">gpr_timespec ts</div><div class="ttdef"><b>Definition:</b> census.h:243</div></div>
    447. 

  447. <div class="ttc" id="structcensus__trace__record_html_a76b2b8a9206a720e02c32c13a534ba78"><div class="ttname"><a href="structcensus__trace__record.html#a76b2b8a9206a720e02c32c13a534ba78">census_trace_record::type</a></div><div class="ttdeci">uint32_t type</div><div class="ttdef"><b>Definition:</b> census.h:404</div></div>
    448. 

  448. <div class="ttc" id="structcensus__context__iterator_html_ab591e487d86084f6e73c79c82bc3b1bc"><div class="ttname"><a href="structcensus__context__iterator.html#ab591e487d86084f6e73c79c82bc3b1bc">census_context_iterator::base</a></div><div class="ttdeci">int base</div><div class="ttdef"><b>Definition:</b> census.h:164</div></div>
    449. 

  449. <div class="ttc" id="structcensus__timestamp_html"><div class="ttname"><a href="structcensus__timestamp.html">census_timestamp</a></div><div class="ttdoc">This structure represents a timestamp as used by census to record the time at which an operation begi...</div><div class="ttdef"><b>Definition:</b> census.h:240</div></div>
    450. 

  450. <div class="ttc" id="census_8h_html_ad4ff7b1db813ee5318871121bb4281ccaadcf28b76de06181051506c96996255a"><div class="ttname"><a href="census_8h.html#ad4ff7b1db813ee5318871121bb4281ccaadcf28b76de06181051506c96996255a">CENSUS_TRACE_MASK_IS_SAMPLED</a></div><div class="ttdef"><b>Definition:</b> census.h:204</div></div>
    451. 

  451. <div class="ttc" id="census_8h_html_aaccea127635aaf9200e776eff7c7ba5d"><div class="ttname"><a href="census_8h.html#aaccea127635aaf9200e776eff7c7ba5d">census_context_decode</a></div><div class="ttdeci">CENSUSAPI census_context * census_context_decode(const char *buffer, size_t size)</div></div>
    452. 

  452. <div class="ttc" id="census_8h_html_a756d86b68b73a9ad9dacdfdaeb2a865c"><div class="ttname"><a href="census_8h.html#a756d86b68b73a9ad9dacdfdaeb2a865c">census_context_next_tag</a></div><div class="ttdeci">CENSUSAPI int census_context_next_tag(census_context_iterator *iterator, census_tag *tag)</div></div>
    453. 

  453. <div class="ttc" id="census_8h_html_ac68fd1dbb1767d8e080ec22f4767be89"><div class="ttname"><a href="census_8h.html#ac68fd1dbb1767d8e080ec22f4767be89">census_delete_resource</a></div><div class="ttdeci">CENSUSAPI void census_delete_resource(int32_t resource_id)</div></div>
    454. 

  454. <div class="ttc" id="structcensus__context__iterator_html_a729daa66104d74f11aa6c5b25c27f563"><div class="ttname"><a href="structcensus__context__iterator.html#a729daa66104d74f11aa6c5b25c27f563">census_context_iterator::context</a></div><div class="ttdeci">const census_context * context</div><div class="ttdef"><b>Definition:</b> census.h:163</div></div>
    455. 

  455. <div class="ttc" id="census_8h_html_ae22d3c8dfe3bfac5e831b0135ff7a536"><div class="ttname"><a href="census_8h.html#ae22d3c8dfe3bfac5e831b0135ff7a536">census_supported</a></div><div class="ttdeci">CENSUSAPI int census_supported(void)</div><div class="ttdoc">Return the features supported by the current census implementation (not all features will be availabl...</div></div>
    456. 

  456. <div class="ttc" id="census_8h_html_aeb7f7e4f427236d00446d2eb836c5252"><div class="ttname"><a href="census_8h.html#aeb7f7e4f427236d00446d2eb836c5252">census_resource_id</a></div><div class="ttdeci">CENSUSAPI int32_t census_resource_id(const char *name)</div></div>
    457. 

  457. <div class="ttc" id="census_8h_html_aeb5d22e80a87eabe9880f08c56e95bf1"><div class="ttname"><a href="census_8h.html#aeb5d22e80a87eabe9880f08c56e95bf1">census_get_trace_record</a></div><div class="ttdeci">CENSUSAPI int census_get_trace_record(census_trace_record *trace_record)</div><div class="ttdoc">Get a trace record. </div></div>
    458. 

  458. <div class="ttc" id="structcensus__tag_html_a13c8315749ec9752d8bb1354a131558b"><div class="ttname"><a href="structcensus__tag.html#a13c8315749ec9752d8bb1354a131558b">census_tag::key</a></div><div class="ttdeci">const char * key</div><div class="ttdef"><b>Definition:</b> census.h:95</div></div>
    459. 

  459. <div class="ttc" id="census_8h_html_aee31ac081d81e46746025b06071f1f0e"><div class="ttname"><a href="census_8h.html#aee31ac081d81e46746025b06071f1f0e">census_end_op</a></div><div class="ttdeci">CENSUSAPI void census_end_op(census_context *context, int status)</div><div class="ttdoc">End an operation started by any of the census_start_*_op*() calls. </div></div>
    460. 

  460. <div class="ttc" id="census_8h_html_a850c1ca105245a514e76519d5edaad2c"><div class="ttname"><a href="census_8h.html#a850c1ca105245a514e76519d5edaad2c">census_initialize</a></div><div class="ttdeci">CENSUSAPI int census_initialize(int features)</div><div class="ttdoc">Shutdown and startup census subsystem. </div></div>
    461. 

  461. <div class="ttc" id="census_8h_html_a2088bf00a48a7a9b0a6e659fa5161ef9"><div class="ttname"><a href="census_8h.html#a2088bf00a48a7a9b0a6e659fa5161ef9">census_set_trace_mask</a></div><div class="ttdeci">CENSUSAPI void census_set_trace_mask(int trace_mask)</div><div class="ttdoc">Set the trace mask associated with a context. </div></div>
    462. 

  462. <div class="ttc" id="structcensus__trace__record_html_a69511d4d1ae8297580789786feb564d4"><div class="ttname"><a href="structcensus__trace__record.html#a69511d4d1ae8297580789786feb564d4">census_trace_record::trace_id</a></div><div class="ttdeci">uint64_t trace_id</div><div class="ttdef"><b>Definition:</b> census.h:402</div></div>
    463. 

  463. <div class="ttc" id="census_8h_html_abe92e59c22481b0de3742673cbbb1bf8"><div class="ttname"><a href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8">census_features</a></div><div class="ttdeci">census_features</div><div class="ttdef"><b>Definition:</b> census.h:48</div></div>
    464. 

  464. <div class="ttc" id="census_8h_html_ab20a8e42995181004f5fbc9a87e339d3"><div class="ttname"><a href="census_8h.html#ab20a8e42995181004f5fbc9a87e339d3">census_set_rpc_client_peer</a></div><div class="ttdeci">CENSUSAPI void census_set_rpc_client_peer(census_context *context, const char *peer)</div><div class="ttdoc">Add peer information to a context representing a client RPC operation. </div></div>
    465. 

  465. <div class="ttc" id="structcensus__tag_html"><div class="ttname"><a href="structcensus__tag.html">census_tag</a></div><div class="ttdef"><b>Definition:</b> census.h:94</div></div>
    466. 

  466. <div class="ttc" id="census_8h_html_a689ea02b5b0907f69ecb0baee371aa55"><div class="ttname"><a href="census_8h.html#a689ea02b5b0907f69ecb0baee371aa55">census_define_resource</a></div><div class="ttdeci">CENSUSAPI int32_t census_define_resource(const uint8_t *resource_pb, size_t resource_pb_size)</div></div>
    467. 

  467. <div class="ttc" id="impl_2codegen_2port__platform_8h_html_a3f6006f19ae6445e4a42f9d16b720ad7"><div class="ttname"><a href="impl_2codegen_2port__platform_8h.html#a3f6006f19ae6445e4a42f9d16b720ad7">CENSUSAPI</a></div><div class="ttdeci">#define CENSUSAPI</div><div class="ttdef"><b>Definition:</b> port_platform.h:418</div></div>
    468. 

  468. <div class="ttc" id="structgpr__timespec_html"><div class="ttname"><a href="structgpr__timespec.html">gpr_timespec</a></div><div class="ttdef"><b>Definition:</b> gpr_types.h:63</div></div>
    469. 

  469. <div class="ttc" id="structcensus__tag_html_a8f4ef3177380ad53f7a8abe1441e8805"><div class="ttname"><a href="structcensus__tag.html#a8f4ef3177380ad53f7a8abe1441e8805">census_tag::value</a></div><div class="ttdeci">const char * value</div><div class="ttdef"><b>Definition:</b> census.h:96</div></div>
    470. 

  470. <div class="ttc" id="census_8h_html_ac19f91fc3442073217752ce4abf5dfc4"><div class="ttname"><a href="census_8h.html#ac19f91fc3442073217752ce4abf5dfc4">census_context_initialize_iterator</a></div><div class="ttdeci">CENSUSAPI void census_context_initialize_iterator(const census_context *context, census_context_iterator *iterator)</div></div>
    471. 

  471. <div class="ttc" id="census_8h_html_ad4ff7b1db813ee5318871121bb4281cca21afa23a531e5d54e70d44ec3c18cfb3"><div class="ttname"><a href="census_8h.html#ad4ff7b1db813ee5318871121bb4281cca21afa23a531e5d54e70d44ec3c18cfb3">CENSUS_TRACE_MASK_NONE</a></div><div class="ttdef"><b>Definition:</b> census.h:203</div></div>
    472. 

  472. <div class="ttc" id="structcensus__trace__record_html_a4ba324fb39273bf3c0c0f15852d9d130"><div class="ttname"><a href="structcensus__trace__record.html#a4ba324fb39273bf3c0c0f15852d9d130">census_trace_record::buffer</a></div><div class="ttdeci">const char * buffer</div><div class="ttdef"><b>Definition:</b> census.h:405</div></div>
    473. 

  473. <div class="ttc" id="structcensus__trace__record_html_abc4f9330e28d906f90346d7fd5769d53"><div class="ttname"><a href="structcensus__trace__record.html#abc4f9330e28d906f90346d7fd5769d53">census_trace_record::buf_size</a></div><div class="ttdeci">size_t buf_size</div><div class="ttdef"><b>Definition:</b> census.h:406</div></div>
    474. 

  474. <div class="ttc" id="grpc_8h_html"><div class="ttname"><a href="grpc_8h.html">grpc.h</a></div></div>
    475. 

  475. <div class="ttc" id="census_8h_html_abd6d5aa344819ec9d73c79b9fe6778dc"><div class="ttname"><a href="census_8h.html#abd6d5aa344819ec9d73c79b9fe6778dc">census_start_client_rpc_op</a></div><div class="ttdeci">CENSUSAPI census_context * census_start_client_rpc_op(const census_context *context, int64_t rpc_name_id, const census_rpc_name_info *rpc_name_info, const char *peer, int trace_mask, const census_timestamp *start_time)</div><div class="ttdoc">Start a client rpc operation. </div></div>
    476. 

  476. <div class="ttc" id="structcensus__context__iterator_html_a1d3bd63edb21b2c2692610f9440b0111"><div class="ttname"><a href="structcensus__context__iterator.html#a1d3bd63edb21b2c2692610f9440b0111">census_context_iterator::index</a></div><div class="ttdeci">int index</div><div class="ttdef"><b>Definition:</b> census.h:165</div></div>
    477. 

  477. <div class="ttc" id="census_8h_html_a57255eb87c6ade8ee6eb8856d3ecfc11"><div class="ttname"><a href="census_8h.html#a57255eb87c6ade8ee6eb8856d3ecfc11">census_start_rpc_op_timestamp</a></div><div class="ttdeci">CENSUSAPI census_timestamp census_start_rpc_op_timestamp(void)</div><div class="ttdoc">Mark the beginning of an RPC operation. </div></div>
    478. 

  478. <div class="ttc" id="structcensus__context__iterator_html"><div class="ttname"><a href="structcensus__context__iterator.html">census_context_iterator</a></div><div class="ttdef"><b>Definition:</b> census.h:162</div></div>
    479. 

  479. <div class="ttc" id="census_8h_html_a27fc8788690179599713226f1f054736"><div class="ttname"><a href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a></div><div class="ttdeci">struct census_context census_context</div><div class="ttdoc">A Census Context is a handle used by Census to represent the current tracing and stats collection inf...</div><div class="ttdef"><b>Definition:</b> census.h:83</div></div>
    480. 

  480. <div class="ttc" id="census_8h_html_abe92e59c22481b0de3742673cbbb1bf8aac1986834f37851b8d899c4a08c8e3ab"><div class="ttname"><a href="census_8h.html#abe92e59c22481b0de3742673cbbb1bf8aac1986834f37851b8d899c4a08c8e3ab">CENSUS_FEATURE_NONE</a></div><div class="ttdef"><b>Definition:</b> census.h:49</div></div>
    481. 

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