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    91. 

  91. <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>
    92. 

  92. <div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> *</span></div>
    93. 

  93. <div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * Copyright 2015, Google Inc.</span></div>
    94. 

  94. <div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> * All rights reserved.</span></div>
    95. 

  95. <div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> *</span></div>
    96. 

  96. <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>
    97. 

  97. <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>
    98. 

  98. <div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"> * met:</span></div>
    99. 

  99. <div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment"> *</span></div>
    100. 

  100. <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>
    101. 

  101. <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>
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  102. <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>
    103. 

  103. <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>
    104. 

  104. <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>
    105. 

  105. <div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment"> * distribution.</span></div>
    106. 

  106. <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>
    107. 

  107. <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>
    108. 

  108. <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>
    109. 

  109. <div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment"> *</span></div>
    110. 

  110. <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>
    111. 

  111. <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>
    112. 

  112. <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>
    113. 

  113. <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>
    114. 

  114. <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>
    115. 

  115. <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>
    116. 

  116. <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>
    117. 

  117. <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>
    118. 

  118. <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>
    119. 

  119. <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>
    120. 

  120. <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>
    121. 

  121. <div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="comment"> *</span></div>
    122. 

  122. <div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="comment"> */</span></div>
    123. 

  123. <div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;</div>
    124. 

  124. <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>
    125. 

  125. <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>
    126. 

  126. <div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="comment"> * implementations). */</span></div>
    127. 

  127. <div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;</div>
    128. 

  128. <div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="preprocessor">#ifndef CENSUS_CENSUS_H</span></div>
    129. 

  129. <div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define CENSUS_CENSUS_H</span></div>
    130. 

  130. <div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="preprocessor"></span></div>
    131. 

  131. <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>
    132. 

  132. <div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;</div>
    133. 

  133. <div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="preprocessor">#ifdef __cplusplus</span></div>
    134. 

  134. <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>
    135. 

  135. <div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="preprocessor">#endif</span></div>
    136. 

  136. <div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="preprocessor"></span></div>
    137. 

  137. <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>
    138. 

  138. <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>
    139. 

  139. <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>
    140. 

  140. <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>
    141. 

  141. <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>
    142. 

  142. <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>
    143. 

  143. <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>
    144. 

  144. <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>
    145. 

  145. <div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;};</div>
    146. 

  146. <div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;</div>
    147. 

  147. <div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;<span class="keywordtype">int</span> <a class="code" href="census_8h.html#a4cea92157f3de215724f6bf4aeaee1b6">census_initialize</a>(<span class="keywordtype">int</span> features);</div>
    148. 

  148. <div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;<span class="keywordtype">void</span> <a class="code" href="census_8h.html#aa792b067548ecdd987d560b492c83d85">census_shutdown</a>(<span class="keywordtype">void</span>);</div>
    149. 

  149. <div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;</div>
    150. 

  150. <div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;<span class="keywordtype">int</span> <a class="code" href="census_8h.html#ad5f627a64ac4febbc61d2b89801d40e9">census_supported</a>(<span class="keywordtype">void</span>);</div>
    151. 

  151. <div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;</div>
    152. 

  152. <div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;<span class="keywordtype">int</span> <a class="code" href="census_8h.html#a742616973e78aaf969389cea20feea9f">census_enabled</a>(<span class="keywordtype">void</span>);</div>
    153. 

  153. <div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;</div>
    154. 

  154. <div class="line"><a name="l00080"></a><span class="lineno"><a class="line" href="census_8h.html#a27fc8788690179599713226f1f054736">   80</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>
    155. 

  155. <div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;</div>
    156. 

  156. <div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;<span class="comment">/* This function is called by the RPC subsystem whenever it needs to get a</span></div>
    157. 

  157. <div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;<span class="comment"> * serialized form of the current census context (presumably to pass across</span></div>
    158. 

  158. <div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;<span class="comment"> * the wire). Arguments:</span></div>
    159. 

  159. <div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;<span class="comment"> * &#39;buffer&#39;: pointer to memory into which serialized context will be placed</span></div>
    160. 

  160. <div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;<span class="comment"> * &#39;buf_size&#39;: size of &#39;buffer&#39;</span></div>
    161. 

  161. <div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;<span class="comment"> *</span></div>
    162. 

  162. <div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;<span class="comment"> * Returns: the number of bytes used in buffer if successful, or 0 if the</span></div>
    163. 

  163. <div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;<span class="comment"> * buffer is of insufficient size.</span></div>
    164. 

  164. <div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;<span class="comment"> *</span></div>
    165. 

  165. <div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;<span class="comment"> * TODO(aveitch): determine how best to communicate required/max buffer size</span></div>
    166. 

  166. <div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;<span class="comment"> * so caller doesn&#39;t have to guess. */</span></div>
    167. 

  167. <div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;<span class="keywordtype">size_t</span> <a class="code" href="census_8h.html#ad9a7d3170ecf720e1b22a4f255605748">census_context_serialize</a>(<span class="keyword">const</span> <a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context, <span class="keywordtype">char</span> *buffer,</div>
    168. 

  168. <div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;                                <span class="keywordtype">size_t</span> buf_size);</div>
    169. 

  169. <div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;</div>
    170. 

  170. <div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;<span class="comment">/* Distributed traces can have a number of options. */</span></div>
    171. 

  171. <div class="line"><a name="l00097"></a><span class="lineno"><a class="line" href="census_8h.html#ad4ff7b1db813ee5318871121bb4281cc">   97</a></span>&#160;<span class="keyword">enum</span> <a class="code" href="census_8h.html#ad4ff7b1db813ee5318871121bb4281cc">census_trace_mask_values</a> {</div>
    172. 

  172. <div class="line"><a name="l00098"></a><span class="lineno"><a class="line" href="census_8h.html#ad4ff7b1db813ee5318871121bb4281cca21afa23a531e5d54e70d44ec3c18cfb3">   98</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>
    173. 

  173. <div class="line"><a name="l00099"></a><span class="lineno"><a class="line" href="census_8h.html#ad4ff7b1db813ee5318871121bb4281ccaadcf28b76de06181051506c96996255a">   99</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>
    174. 

  174. <div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;};</div>
    175. 

  175. <div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;</div>
    176. 

  176. <div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;<span class="keywordtype">int</span> <a class="code" href="census_8h.html#afeb62854542a09290181209ea72b9158">census_trace_mask</a>(<span class="keyword">const</span> <a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context);</div>
    177. 

  177. <div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;</div>
    178. 

  178. <div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;<span class="keywordtype">void</span> <a class="code" href="census_8h.html#a2762b05c4e9bb8a6994519725cb69a84">census_set_trace_mask</a>(<span class="keywordtype">int</span> trace_mask);</div>
    179. 

  179. <div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;</div>
    180. 

  180. <div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;<span class="comment">/* The concept of &quot;operation&quot; is a fundamental concept for Census. In an RPC</span></div>
    181. 

  181. <div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;<span class="comment">   system, and operation typcially represents a single RPC, or a significant</span></div>
    182. 

  182. <div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;<span class="comment">   sub-part thereof (e.g. a single logical &quot;read&quot; RPC to a distributed storage</span></div>
    183. 

  183. <div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;<span class="comment">   system might do several other actions in parallel, from looking up metadata</span></div>
    184. 

  184. <div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;<span class="comment">   indices to making requests of other services - each of these could be a</span></div>
    185. 

  185. <div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;<span class="comment">   sub-operation with the larger RPC operation). Census uses operations for the</span></div>
    186. 

  186. <div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;<span class="comment">   following:</span></div>
    187. 

  187. <div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;<span class="comment"></span></div>
    188. 

  188. <div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;<span class="comment">   CPU accounting: If enabled, census will measure the thread CPU time</span></div>
    189. 

  189. <div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;<span class="comment">   consumed between operation start and end times.</span></div>
    190. 

  190. <div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;<span class="comment"></span></div>
    191. 

  191. <div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;<span class="comment">   Active operations: Census will maintain information on all currently</span></div>
    192. 

  192. <div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;<span class="comment">   active operations.</span></div>
    193. 

  193. <div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;<span class="comment"></span></div>
    194. 

  194. <div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;<span class="comment">   Distributed tracing: Each operation serves as a logical trace span.</span></div>
    195. 

  195. <div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;<span class="comment"></span></div>
    196. 

  196. <div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;<span class="comment">   Stats collection: Stats are broken down by operation (e.g. latency</span></div>
    197. 

  197. <div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;<span class="comment">   breakdown for each unique RPC path).</span></div>
    198. 

  198. <div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;<span class="comment"></span></div>
    199. 

  199. <div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;<span class="comment">   The following functions serve to delineate the start and stop points for</span></div>
    200. 

  200. <div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;<span class="comment">   each logical operation. */</span></div>
    201. 

  201. <div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;</div>
    202. 

  202. <div class="line"><a name="l00135"></a><span class="lineno"><a class="line" href="structcensus__timestamp.html">  135</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span>{</div>
    203. 

  203. <div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;  <span class="comment">/* Use gpr_timespec for default implementation. High performance</span></div>
    204. 

  204. <div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;<span class="comment">   * implementations should use a cycle-counter based timestamp. */</span></div>
    205. 

  205. <div class="line"><a name="l00138"></a><span class="lineno"><a class="line" href="structcensus__timestamp.html#a36ed36ffcf81f720bbdade460f957004">  138</a></span>&#160;  <a class="code" href="structgpr__timespec.html">gpr_timespec</a> <a class="code" href="structcensus__timestamp.html#a36ed36ffcf81f720bbdade460f957004">ts</a>;</div>
    206. 

  206. <div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;} <a class="code" href="structcensus__timestamp.html">census_timestamp</a>;</div>
    207. 

  207. <div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;</div>
    208. 

  208. <div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;<a class="code" href="structcensus__timestamp.html">census_timestamp</a> <a class="code" href="census_8h.html#a71b2afd7a1663c2a716af7242895442b">census_start_rpc_op_timestamp</a>(<span class="keywordtype">void</span>);</div>
    209. 

  209. <div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;</div>
    210. 

  210. <div class="line"><a name="l00168"></a><span class="lineno"><a class="line" href="structcensus__rpc__name__info.html">  168</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span>{</div>
    211. 

  211. <div class="line"><a name="l00169"></a><span class="lineno"><a class="line" href="structcensus__rpc__name__info.html#a118286ec604a75b5427ba5084892f77d">  169</a></span>&#160;  <span class="keyword">const</span> <span class="keywordtype">char</span> *(*get_rpc_service_name)(<a class="code" href="port__platform_8h.html#a71edab4bc3421f129764e5cb342f7181">gpr_int64</a> id);</div>
    212. 

  212. <div class="line"><a name="l00170"></a><span class="lineno"><a class="line" href="structcensus__rpc__name__info.html#a28515ce96da75622b396a50d73b5194c">  170</a></span>&#160;  <span class="keyword">const</span> <span class="keywordtype">char</span> *(*get_rpc_method_name)(<a class="code" href="port__platform_8h.html#a71edab4bc3421f129764e5cb342f7181">gpr_int64</a> id);</div>
    213. 

  213. <div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;} <a class="code" href="structcensus__rpc__name__info.html">census_rpc_name_info</a>;</div>
    214. 

  214. <div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;</div>
    215. 

  215. <div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;<a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *<a class="code" href="census_8h.html#a0f2a69b151eac68f3c50806d2162d9f4">census_start_client_rpc_op</a>(</div>
    216. 

  216. <div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;    <span class="keyword">const</span> <a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context, <a class="code" href="port__platform_8h.html#a71edab4bc3421f129764e5cb342f7181">gpr_int64</a> rpc_name_id,</div>
    217. 

  217. <div class="line"><a name="l00209"></a><span class="lineno">  209</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>
    218. 

  218. <div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;    <span class="keyword">const</span> <a class="code" href="structcensus__timestamp.html">census_timestamp</a> *start_time);</div>
    219. 

  219. <div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;</div>
    220. 

  220. <div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;<span class="keywordtype">void</span> <a class="code" href="census_8h.html#a06407a753c261626b4e25c4f6fe0b840">census_set_rpc_client_peer</a>(<a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context, <span class="keyword">const</span> <span class="keywordtype">char</span> *peer);</div>
    221. 

  221. <div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;</div>
    222. 

  222. <div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;<a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *<a class="code" href="census_8h.html#ab7014fb10de411a91588f05658148177">census_start_server_rpc_op</a>(</div>
    223. 

  223. <div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">char</span> *buffer, <a class="code" href="port__platform_8h.html#a71edab4bc3421f129764e5cb342f7181">gpr_int64</a> rpc_name_id,</div>
    224. 

  224. <div class="line"><a name="l00237"></a><span class="lineno">  237</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>
    225. 

  225. <div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;    <a class="code" href="structcensus__timestamp.html">census_timestamp</a> *start_time);</div>
    226. 

  226. <div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;</div>
    227. 

  227. <div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;<a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *<a class="code" href="census_8h.html#a14287fdb8adc322c1801435eb121e642">census_start_op</a>(<a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context, <span class="keyword">const</span> <span class="keywordtype">char</span> *family,</div>
    228. 

  228. <div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;                                <span class="keyword">const</span> <span class="keywordtype">char</span> *name, <span class="keywordtype">int</span> trace_mask);</div>
    229. 

  229. <div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;</div>
    230. 

  230. <div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;<span class="keywordtype">void</span> <a class="code" href="census_8h.html#a97a3300020cdacd7149e0efae9f5541e">census_end_op</a>(<a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context, <span class="keywordtype">int</span> status);</div>
    231. 

  231. <div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;</div>
    232. 

  232. <div class="line"><a name="l00279"></a><span class="lineno"><a class="line" href="census_8h.html#acb35403ed23ba2615457fabaa0b430e7">  279</a></span>&#160;<span class="preprocessor">#define CENSUS_TRACE_RECORD_START_OP ((gpr_uint32)0)</span></div>
    233. 

  233. <div class="line"><a name="l00280"></a><span class="lineno"><a class="line" href="census_8h.html#a003fb5bda98c95408a21d3a47571a1e9">  280</a></span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define CENSUS_TRACE_RECORD_END_OP ((gpr_uint32)1)</span></div>
    234. 

  234. <div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;<span class="preprocessor"></span></div>
    235. 

  235. <div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;<span class="keywordtype">void</span> <a class="code" href="census_8h.html#af3822f36fcbca23a3af9d3e8b3fb3317">census_trace_print</a>(<a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context, <a class="code" href="port__platform_8h.html#aa6abd4df815a5498d1a04b5e691a74a9">gpr_uint32</a> type,</div>
    236. 

  236. <div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;                        <span class="keyword">const</span> <span class="keywordtype">char</span> *buffer, <span class="keywordtype">size_t</span> n);</div>
    237. 

  237. <div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;</div>
    238. 

  238. <div class="line"><a name="l00293"></a><span class="lineno"><a class="line" href="structcensus__trace__record.html">  293</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span>{</div>
    239. 

  239. <div class="line"><a name="l00294"></a><span class="lineno"><a class="line" href="structcensus__trace__record.html#ac7f74956d51898681b8e35a8031ac9fb">  294</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>
    240. 

  240. <div class="line"><a name="l00295"></a><span class="lineno"><a class="line" href="structcensus__trace__record.html#a7d12a98b15db3199dc221a1be036088b">  295</a></span>&#160;  <a class="code" href="port__platform_8h.html#a737bb95b7b58d90b4215602d36ed65b6">gpr_uint64</a> <a class="code" href="structcensus__trace__record.html#a7d12a98b15db3199dc221a1be036088b">trace_id</a>;        <span class="comment">/* Trace ID associated with record */</span></div>
    241. 

  241. <div class="line"><a name="l00296"></a><span class="lineno"><a class="line" href="structcensus__trace__record.html#a9bb150a1752a810cde915432976f1839">  296</a></span>&#160;  <a class="code" href="port__platform_8h.html#a737bb95b7b58d90b4215602d36ed65b6">gpr_uint64</a> <a class="code" href="structcensus__trace__record.html#a9bb150a1752a810cde915432976f1839">op_id</a>;           <span class="comment">/* Operation ID associated with record */</span></div>
    242. 

  242. <div class="line"><a name="l00297"></a><span class="lineno"><a class="line" href="structcensus__trace__record.html#a827fe499f3c0777ae1dcb3969943e7fc">  297</a></span>&#160;  <a class="code" href="port__platform_8h.html#aa6abd4df815a5498d1a04b5e691a74a9">gpr_uint32</a> <a class="code" href="structcensus__trace__record.html#a827fe499f3c0777ae1dcb3969943e7fc">type</a>;            <span class="comment">/* Type (as used in census_trace_print() */</span></div>
    243. 

  243. <div class="line"><a name="l00298"></a><span class="lineno"><a class="line" href="structcensus__trace__record.html#a4ba324fb39273bf3c0c0f15852d9d130">  298</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>
    244. 

  244. <div class="line"><a name="l00299"></a><span class="lineno"><a class="line" href="structcensus__trace__record.html#abc4f9330e28d906f90346d7fd5769d53">  299</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>
    245. 

  245. <div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;} <a class="code" href="structcensus__trace__record.html">census_trace_record</a>;</div>
    246. 

  246. <div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;</div>
    247. 

  247. <div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160;<span class="keywordtype">int</span> <a class="code" href="census_8h.html#ab93305c7e6b04cd51f95aa497227f53a">census_trace_scan_start</a>(<span class="keywordtype">int</span> consume);</div>
    248. 

  248. <div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;</div>
    249. 

  249. <div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;<span class="keywordtype">int</span> <a class="code" href="census_8h.html#a31151a1bca352d6046e6039fa864808c">census_get_trace_record</a>(<a class="code" href="structcensus__trace__record.html">census_trace_record</a> *trace_record);</div>
    250. 

  250. <div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;</div>
    251. 

  251. <div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;<span class="keywordtype">void</span> <a class="code" href="census_8h.html#adee01ffd0c56ca2c8c90919a73c3f8ba">census_trace_scan_end</a>();</div>
    252. 

  252. <div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;</div>
    253. 

  253. <div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;<span class="comment">/* Max number of characters in tag key */</span></div>
    254. 

  254. <div class="line"><a name="l00328"></a><span class="lineno"><a class="line" href="census_8h.html#aa89c96f0f32d85a1b28b68f0ef326dd4">  328</a></span>&#160;<span class="preprocessor">#define CENSUS_MAX_TAG_KEY_LENGTH 20</span></div>
    255. 

  255. <div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160;<span class="preprocessor"></span><span class="comment">/* Max number of tag value characters */</span></div>
    256. 

  256. <div class="line"><a name="l00330"></a><span class="lineno"><a class="line" href="census_8h.html#a22d6971ca41fd944e13e5b4c2a42bf8c">  330</a></span>&#160;<span class="preprocessor">#define CENSUS_MAX_TAG_VALUE_LENGTH 50</span></div>
    257. 

  257. <div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;<span class="preprocessor"></span></div>
    258. 

  258. <div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;<span class="comment">/* A Census tag set is a collection of key:value string pairs; these form the</span></div>
    259. 

  259. <div class="line"><a name="l00333"></a><span class="lineno">  333</span>&#160;<span class="comment">   basis against which Census metrics will be recorded. Keys are unique within</span></div>
    260. 

  260. <div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;<span class="comment">   a tag set. All contexts have an associated tag set. */</span></div>
    261. 

  261. <div class="line"><a name="l00335"></a><span class="lineno"><a class="line" href="census_8h.html#afc68a73849e0d1565e74c28c822bb086">  335</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="census_8h.html#afc68a73849e0d1565e74c28c822bb086">census_tag_set</a> <a class="code" href="census_8h.html#afc68a73849e0d1565e74c28c822bb086">census_tag_set</a>;</div>
    262. 

  262. <div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;</div>
    263. 

  263. <div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160;<span class="comment">/* Returns a pointer to a newly created, empty tag set. If size_hint &gt; 0,</span></div>
    264. 

  264. <div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160;<span class="comment">   indicates that the tag set is intended to hold approximately that number</span></div>
    265. 

  265. <div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;<span class="comment">   of tags. */</span></div>
    266. 

  266. <div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;<a class="code" href="census_8h.html#afc68a73849e0d1565e74c28c822bb086">census_tag_set</a> *<a class="code" href="census_8h.html#a14f21902360aa221e6307cec05a110a5">census_tag_set_create</a>(<span class="keywordtype">size_t</span> size_hint);</div>
    267. 

  267. <div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;</div>
    268. 

  268. <div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;<span class="comment">/* Add a new tag key/value to an existing tag set; if the tag key already exists</span></div>
    269. 

  269. <div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;<span class="comment">   in the tag set, then its value is overwritten with the new one. Can also be</span></div>
    270. 

  270. <div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;<span class="comment">   used to delete a tag, by specifying a NULL value. If key is NULL, returns</span></div>
    271. 

  271. <div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;<span class="comment">   the number of tags in the tag set.</span></div>
    272. 

  272. <div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160;<span class="comment">   Return values:</span></div>
    273. 

  273. <div class="line"><a name="l00347"></a><span class="lineno">  347</span>&#160;<span class="comment">   -1: invalid length key or value</span></div>
    274. 

  274. <div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;<span class="comment">   non-negative value: the number of tags in the tag set. */</span></div>
    275. 

  275. <div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;<span class="keywordtype">int</span> <a class="code" href="census_8h.html#ac690af8a7c06c6fb152fc9b0b8efc142">census_tag_set_add</a>(<a class="code" href="census_8h.html#afc68a73849e0d1565e74c28c822bb086">census_tag_set</a> *tags, <span class="keyword">const</span> <span class="keywordtype">char</span> *key,</div>
    276. 

  276. <div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;                       <span class="keyword">const</span> <span class="keywordtype">char</span> *value);</div>
    277. 

  277. <div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;</div>
    278. 

  278. <div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;<span class="comment">/* Destroys a tag set. This function must be called to prevent memory leaks.</span></div>
    279. 

  279. <div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;<span class="comment">   Once called, the tag set cannot be used again. */</span></div>
    280. 

  280. <div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;<span class="keywordtype">void</span> <a class="code" href="census_8h.html#a07ccf6250c7e2d4ef7180c510fd68ab2">census_tag_set_destroy</a>(<a class="code" href="census_8h.html#afc68a73849e0d1565e74c28c822bb086">census_tag_set</a> *tags);</div>
    281. 

  281. <div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;</div>
    282. 

  282. <div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160;<span class="comment">/* Get a contexts tag set. */</span></div>
    283. 

  283. <div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;<a class="code" href="census_8h.html#afc68a73849e0d1565e74c28c822bb086">census_tag_set</a> *<a class="code" href="census_8h.html#a78ec7fa52ea54e631bb11d59a8adba33">census_context_tag_set</a>(<a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context);</div>
    284. 

  284. <div class="line"><a name="l00358"></a><span class="lineno">  358</span>&#160;</div>
    285. 

  285. <div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;<span class="comment">/* A read-only representation of a tag for use by census clients. */</span></div>
    286. 

  286. <div class="line"><a name="l00360"></a><span class="lineno"><a class="line" href="structcensus__tag__const.html">  360</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span>{</div>
    287. 

  287. <div class="line"><a name="l00361"></a><span class="lineno"><a class="line" href="structcensus__tag__const.html#a0da666348257edd491a26528e6bacc8f">  361</a></span>&#160;  <span class="keywordtype">size_t</span> <a class="code" href="structcensus__tag__const.html#a0da666348257edd491a26528e6bacc8f">key_len</a>;    <span class="comment">/* Number of bytes in tag key. */</span></div>
    288. 

  288. <div class="line"><a name="l00362"></a><span class="lineno"><a class="line" href="structcensus__tag__const.html#aaffe4ea2b11ae8cfde18e5b99c4536d2">  362</a></span>&#160;  <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="structcensus__tag__const.html#aaffe4ea2b11ae8cfde18e5b99c4536d2">key</a>;   <span class="comment">/* A pointer to the tag key. May not be null-terminated. */</span></div>
    289. 

  289. <div class="line"><a name="l00363"></a><span class="lineno"><a class="line" href="structcensus__tag__const.html#ac7dd97b14d839f337d34ef5c6d3f882a">  363</a></span>&#160;  <span class="keywordtype">size_t</span> <a class="code" href="structcensus__tag__const.html#ac7dd97b14d839f337d34ef5c6d3f882a">value_len</a>;  <span class="comment">/* Number of bytes in tag value. */</span></div>
    290. 

  290. <div class="line"><a name="l00364"></a><span class="lineno"><a class="line" href="structcensus__tag__const.html#a27fd204425bf861f10cd26df3dd6fb27">  364</a></span>&#160;  <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="structcensus__tag__const.html#a27fd204425bf861f10cd26df3dd6fb27">value</a>; <span class="comment">/* Pointer to the tag value. May not be null-terminated. */</span></div>
    291. 

  291. <div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160;} <a class="code" href="structcensus__tag__const.html">census_tag_const</a>;</div>
    292. 

  292. <div class="line"><a name="l00366"></a><span class="lineno">  366</span>&#160;</div>
    293. 

  293. <div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;<span class="comment">/* Used to iterate through a tag sets contents. */</span></div>
    294. 

  294. <div class="line"><a name="l00368"></a><span class="lineno"><a class="line" href="census_8h.html#a22a740b7e9e3798cb9208b3bd6ea31a7">  368</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="census_8h.html#a22a740b7e9e3798cb9208b3bd6ea31a7">census_tag_set_iterator</a> <a class="code" href="census_8h.html#a22a740b7e9e3798cb9208b3bd6ea31a7">census_tag_set_iterator</a>;</div>
    295. 

  295. <div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;</div>
    296. 

  296. <div class="line"><a name="l00370"></a><span class="lineno">  370</span>&#160;<span class="comment">/* Open a tag set for iteration. The tag set must not be modified while</span></div>
    297. 

  297. <div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;<span class="comment">   iteration is ongoing. Returns an iterator for use in following functions. */</span></div>
    298. 

  298. <div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;<a class="code" href="census_8h.html#a22a740b7e9e3798cb9208b3bd6ea31a7">census_tag_set_iterator</a> *<a class="code" href="census_8h.html#aae5c38cb581600a401d1f8dca741bf63">census_tag_set_open</a>(<a class="code" href="census_8h.html#afc68a73849e0d1565e74c28c822bb086">census_tag_set</a> *tags);</div>
    299. 

  299. <div class="line"><a name="l00373"></a><span class="lineno">  373</span>&#160;</div>
    300. 

  300. <div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;<span class="comment">/* Get the next tag in the tag set, by writing into the &#39;tag&#39; argument. Returns</span></div>
    301. 

  301. <div class="line"><a name="l00375"></a><span class="lineno">  375</span>&#160;<span class="comment">   1 if there is a &quot;next&quot; tag, 0 if there are no more tags. */</span></div>
    302. 

  302. <div class="line"><a name="l00376"></a><span class="lineno">  376</span>&#160;<span class="keywordtype">int</span> <a class="code" href="census_8h.html#a03847b518034c5c3b801fdd95569f400">census_tag_set_next</a>(<a class="code" href="census_8h.html#a22a740b7e9e3798cb9208b3bd6ea31a7">census_tag_set_iterator</a> *it, <a class="code" href="structcensus__tag__const.html">census_tag_const</a> *tag);</div>
    303. 

  303. <div class="line"><a name="l00377"></a><span class="lineno">  377</span>&#160;</div>
    304. 

  304. <div class="line"><a name="l00378"></a><span class="lineno">  378</span>&#160;<span class="comment">/* Close an iterator opened by census_tag_set_open(). The iterator will be</span></div>
    305. 

  305. <div class="line"><a name="l00379"></a><span class="lineno">  379</span>&#160;<span class="comment">   invalidated, and should not be used once close is called. */</span></div>
    306. 

  306. <div class="line"><a name="l00380"></a><span class="lineno">  380</span>&#160;<span class="keywordtype">void</span> <a class="code" href="census_8h.html#acbca4449a68fd3e2c17f1e0bcf1e663a">census_tag_set_close</a>(<a class="code" href="census_8h.html#a22a740b7e9e3798cb9208b3bd6ea31a7">census_tag_set_iterator</a> *it);</div>
    307. 

  307. <div class="line"><a name="l00381"></a><span class="lineno">  381</span>&#160;</div>
    308. 

  308. <div class="line"><a name="l00382"></a><span class="lineno">  382</span>&#160;<span class="comment">/* Core stats collection API&#39;s. The following concepts are used:</span></div>
    309. 

  309. <div class="line"><a name="l00383"></a><span class="lineno">  383</span>&#160;<span class="comment">   * Aggregation: A collection of values. Census supports the following</span></div>
    310. 

  310. <div class="line"><a name="l00384"></a><span class="lineno">  384</span>&#160;<span class="comment">       aggregation types:</span></div>
    311. 

  311. <div class="line"><a name="l00385"></a><span class="lineno">  385</span>&#160;<span class="comment">         Sum - a single summation type. Typically used for keeping (e.g.)</span></div>
    312. 

  312. <div class="line"><a name="l00386"></a><span class="lineno">  386</span>&#160;<span class="comment">           counts of events.</span></div>
    313. 

  313. <div class="line"><a name="l00387"></a><span class="lineno">  387</span>&#160;<span class="comment">         Distribution - statistical distribution information, used for</span></div>
    314. 

  314. <div class="line"><a name="l00388"></a><span class="lineno">  388</span>&#160;<span class="comment">           recording average, standard deviation etc.</span></div>
    315. 

  315. <div class="line"><a name="l00389"></a><span class="lineno">  389</span>&#160;<span class="comment">         Histogram - a histogram of measurements falling in defined bucket</span></div>
    316. 

  316. <div class="line"><a name="l00390"></a><span class="lineno">  390</span>&#160;<span class="comment">           boundaries.</span></div>
    317. 

  317. <div class="line"><a name="l00391"></a><span class="lineno">  391</span>&#160;<span class="comment">         Window - a count of events that happen in reolling time window.</span></div>
    318. 

  318. <div class="line"><a name="l00392"></a><span class="lineno">  392</span>&#160;<span class="comment">     New aggregation types can be added by the user, if desired (see</span></div>
    319. 

  319. <div class="line"><a name="l00393"></a><span class="lineno">  393</span>&#160;<span class="comment">     census_register_aggregation()).</span></div>
    320. 

  320. <div class="line"><a name="l00394"></a><span class="lineno">  394</span>&#160;<span class="comment">   * Metric: Each measurement is for a single metric. Examples include RPC</span></div>
    321. 

  321. <div class="line"><a name="l00395"></a><span class="lineno">  395</span>&#160;<span class="comment">     latency, CPU seconds consumed, and bytes transmitted.</span></div>
    322. 

  322. <div class="line"><a name="l00396"></a><span class="lineno">  396</span>&#160;<span class="comment">   * View: A view is a combination of a metric, a tag set (in which the tag</span></div>
    323. 

  323. <div class="line"><a name="l00397"></a><span class="lineno">  397</span>&#160;<span class="comment">     values are regular expressions) and a set of aggregations. When a</span></div>
    324. 

  324. <div class="line"><a name="l00398"></a><span class="lineno">  398</span>&#160;<span class="comment">     measurement for a metric matches the view tags, it is recorded (for each</span></div>
    325. 

  325. <div class="line"><a name="l00399"></a><span class="lineno">  399</span>&#160;<span class="comment">     unique set of tags) against each aggregation. Each metric can have an</span></div>
    326. 

  326. <div class="line"><a name="l00400"></a><span class="lineno">  400</span>&#160;<span class="comment">     arbitrary number of views by which it will be broken down.</span></div>
    327. 

  327. <div class="line"><a name="l00401"></a><span class="lineno">  401</span>&#160;<span class="comment">*/</span></div>
    328. 

  328. <div class="line"><a name="l00402"></a><span class="lineno">  402</span>&#160;</div>
    329. 

  329. <div class="line"><a name="l00403"></a><span class="lineno">  403</span>&#160;<span class="comment">/* A single value to be recorded comprises two parts: an ID for the particular</span></div>
    330. 

  330. <div class="line"><a name="l00404"></a><span class="lineno">  404</span>&#160;<span class="comment"> * metric and the value to be recorded against it. */</span></div>
    331. 

  331. <div class="line"><a name="l00405"></a><span class="lineno"><a class="line" href="structcensus__value.html">  405</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span>{</div>
    332. 

  332. <div class="line"><a name="l00406"></a><span class="lineno"><a class="line" href="structcensus__value.html#a1e644fb8e7b1d8e6b06e717f00658522">  406</a></span>&#160;  <a class="code" href="port__platform_8h.html#aa6abd4df815a5498d1a04b5e691a74a9">gpr_uint32</a> <a class="code" href="structcensus__value.html#a1e644fb8e7b1d8e6b06e717f00658522">metric_id</a>;</div>
    333. 

  333. <div class="line"><a name="l00407"></a><span class="lineno"><a class="line" href="structcensus__value.html#a5bff69239476e80fc5c54f3302fffa34">  407</a></span>&#160;  <span class="keywordtype">double</span> <a class="code" href="structcensus__value.html#a5bff69239476e80fc5c54f3302fffa34">value</a>;</div>
    334. 

  334. <div class="line"><a name="l00408"></a><span class="lineno">  408</span>&#160;} <a class="code" href="structcensus__value.html">census_value</a>;</div>
    335. 

  335. <div class="line"><a name="l00409"></a><span class="lineno">  409</span>&#160;</div>
    336. 

  336. <div class="line"><a name="l00410"></a><span class="lineno">  410</span>&#160;<span class="comment">/* Record new usage values against the given context. */</span></div>
    337. 

  337. <div class="line"><a name="l00411"></a><span class="lineno">  411</span>&#160;<span class="keywordtype">void</span> <a class="code" href="census_8h.html#a1225e8bbc14ff51173b6485940940572">census_record_values</a>(<a class="code" href="census_8h.html#a27fc8788690179599713226f1f054736">census_context</a> *context, <a class="code" href="structcensus__value.html">census_value</a> *values,</div>
    338. 

  338. <div class="line"><a name="l00412"></a><span class="lineno">  412</span>&#160;                          <span class="keywordtype">size_t</span> nvalues);</div>
    339. 

  339. <div class="line"><a name="l00413"></a><span class="lineno">  413</span>&#160;</div>
    340. 

  340. <div class="line"><a name="l00415"></a><span class="lineno"><a class="line" href="census_8h.html#a2b2990a51808c9177b14476195a9fb94">  415</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="census_8h.html#a2b2990a51808c9177b14476195a9fb94">census_aggregation_ops</a> <a class="code" href="census_8h.html#a2b2990a51808c9177b14476195a9fb94">census_aggregation_ops</a>;</div>
    341. 

  341. <div class="line"><a name="l00416"></a><span class="lineno">  416</span>&#160;</div>
    342. 

  342. <div class="line"><a name="l00417"></a><span class="lineno">  417</span>&#160;<span class="comment">/* Predefined aggregation types, for use with census_view_create(). */</span></div>
    343. 

  343. <div class="line"><a name="l00418"></a><span class="lineno">  418</span>&#160;<span class="keyword">extern</span> <a class="code" href="census_8h.html#a2b2990a51808c9177b14476195a9fb94">census_aggregation_ops</a> <a class="code" href="census_8h.html#a35d6ca1b9557bb6e12d79e137a5df944">census_agg_sum</a>;</div>
    344. 

  344. <div class="line"><a name="l00419"></a><span class="lineno">  419</span>&#160;<span class="keyword">extern</span> <a class="code" href="census_8h.html#a2b2990a51808c9177b14476195a9fb94">census_aggregation_ops</a> <a class="code" href="census_8h.html#a37ac21fb6ba91fc1f80523cf3d55dbfa">census_agg_distribution</a>;</div>
    345. 

  345. <div class="line"><a name="l00420"></a><span class="lineno">  420</span>&#160;<span class="keyword">extern</span> <a class="code" href="census_8h.html#a2b2990a51808c9177b14476195a9fb94">census_aggregation_ops</a> <a class="code" href="census_8h.html#a22bfed34d03c9f9f061f7aaf5fc5378c">census_agg_histogram</a>;</div>
    346. 

  346. <div class="line"><a name="l00421"></a><span class="lineno">  421</span>&#160;<span class="keyword">extern</span> <a class="code" href="census_8h.html#a2b2990a51808c9177b14476195a9fb94">census_aggregation_ops</a> <a class="code" href="census_8h.html#a4b8a7f096dcd85c93f823cddb2bf960e">census_agg_window</a>;</div>
    347. 

  347. <div class="line"><a name="l00422"></a><span class="lineno">  422</span>&#160;</div>
    348. 

  348. <div class="line"><a name="l00425"></a><span class="lineno"><a class="line" href="structcensus__aggregation.html">  425</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span>{</div>
    349. 

  349. <div class="line"><a name="l00426"></a><span class="lineno"><a class="line" href="structcensus__aggregation.html#afce3bda99fdeb6c77dde6368e1c45ffa">  426</a></span>&#160;  <span class="keyword">const</span> <a class="code" href="census_8h.html#a2b2990a51808c9177b14476195a9fb94">census_aggregation_ops</a> *<a class="code" href="structcensus__aggregation.html#afce3bda99fdeb6c77dde6368e1c45ffa">ops</a>;</div>
    350. 

  350. <div class="line"><a name="l00427"></a><span class="lineno">  427</span>&#160;  <span class="keyword">const</span> <span class="keywordtype">void</span> *</div>
    351. 

  351. <div class="line"><a name="l00428"></a><span class="lineno"><a class="line" href="structcensus__aggregation.html#a5b2ce3ab21a88058ea67c944d6a37426">  428</a></span>&#160;      <a class="code" href="structcensus__aggregation.html#a5b2ce3ab21a88058ea67c944d6a37426">create_arg</a>; <span class="comment">/* Argument to be used for aggregation initialization. */</span></div>
    352. 

  352. <div class="line"><a name="l00429"></a><span class="lineno">  429</span>&#160;} <a class="code" href="structcensus__aggregation.html">census_aggregation</a>;</div>
    353. 

  353. <div class="line"><a name="l00430"></a><span class="lineno">  430</span>&#160;</div>
    354. 

  354. <div class="line"><a name="l00432"></a><span class="lineno"><a class="line" href="census_8h.html#ae43cfb236f1c79eeefb4d9bdf91e3aed">  432</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="census_8h.html#ae43cfb236f1c79eeefb4d9bdf91e3aed">census_view</a> <a class="code" href="census_8h.html#ae43cfb236f1c79eeefb4d9bdf91e3aed">census_view</a>;</div>
    355. 

  355. <div class="line"><a name="l00433"></a><span class="lineno">  433</span>&#160;</div>
    356. 

  356. <div class="line"><a name="l00442"></a><span class="lineno">  442</span>&#160;<a class="code" href="census_8h.html#ae43cfb236f1c79eeefb4d9bdf91e3aed">census_view</a> *<a class="code" href="census_8h.html#a3bf772ddda26227f485b375192af85f2">census_view_create</a>(<a class="code" href="port__platform_8h.html#aa6abd4df815a5498d1a04b5e691a74a9">gpr_uint32</a> metric_id,</div>
    357. 

  357. <div class="line"><a name="l00443"></a><span class="lineno">  443</span>&#160;                                <span class="keyword">const</span> <a class="code" href="census_8h.html#afc68a73849e0d1565e74c28c822bb086">census_tag_set</a> *tags,</div>
    358. 

  358. <div class="line"><a name="l00444"></a><span class="lineno">  444</span>&#160;                                <span class="keyword">const</span> <a class="code" href="structcensus__aggregation.html">census_aggregation</a> *aggregations,</div>
    359. 

  359. <div class="line"><a name="l00445"></a><span class="lineno">  445</span>&#160;                                <span class="keywordtype">size_t</span> naggregations);</div>
    360. 

  360. <div class="line"><a name="l00446"></a><span class="lineno">  446</span>&#160;</div>
    361. 

  361. <div class="line"><a name="l00448"></a><span class="lineno">  448</span>&#160;<span class="keywordtype">void</span> <a class="code" href="census_8h.html#a529bb89984b69da3b4cab9deb68175a9">census_view_delete</a>(<a class="code" href="census_8h.html#ae43cfb236f1c79eeefb4d9bdf91e3aed">census_view</a> *view);</div>
    362. 

  362. <div class="line"><a name="l00449"></a><span class="lineno">  449</span>&#160;</div>
    363. 

  363. <div class="line"><a name="l00451"></a><span class="lineno">  451</span>&#160;<span class="keywordtype">size_t</span> <a class="code" href="census_8h.html#aa5741f85edf5b3e72f89797ae85463b0">census_view_metric</a>(<span class="keyword">const</span> <a class="code" href="census_8h.html#ae43cfb236f1c79eeefb4d9bdf91e3aed">census_view</a> *view);</div>
    364. 

  364. <div class="line"><a name="l00452"></a><span class="lineno">  452</span>&#160;</div>
    365. 

  365. <div class="line"><a name="l00454"></a><span class="lineno">  454</span>&#160;<span class="keywordtype">size_t</span> <a class="code" href="census_8h.html#ac993f47fe73f67e5f8c8f4b00c358144">census_view_naggregations</a>(<span class="keyword">const</span> <a class="code" href="census_8h.html#ae43cfb236f1c79eeefb4d9bdf91e3aed">census_view</a> *view);</div>
    366. 

  366. <div class="line"><a name="l00455"></a><span class="lineno">  455</span>&#160;</div>
    367. 

  367. <div class="line"><a name="l00457"></a><span class="lineno">  457</span>&#160;<span class="keyword">const</span> <a class="code" href="census_8h.html#afc68a73849e0d1565e74c28c822bb086">census_tag_set</a> *<a class="code" href="census_8h.html#a054543816f063d003a36316fda4547b8">census_view_tags</a>(<span class="keyword">const</span> <a class="code" href="census_8h.html#ae43cfb236f1c79eeefb4d9bdf91e3aed">census_view</a> *view);</div>
    368. 

  368. <div class="line"><a name="l00458"></a><span class="lineno">  458</span>&#160;</div>
    369. 

  369. <div class="line"><a name="l00460"></a><span class="lineno">  460</span>&#160;<span class="keyword">const</span> <a class="code" href="structcensus__aggregation.html">census_aggregation</a> *<a class="code" href="census_8h.html#ab40a6a544d107b067eb5ca8326efeded">census_view_aggregrations</a>(<span class="keyword">const</span> <a class="code" href="census_8h.html#ae43cfb236f1c79eeefb4d9bdf91e3aed">census_view</a> *view);</div>
    370. 

  370. <div class="line"><a name="l00461"></a><span class="lineno">  461</span>&#160;</div>
    371. 

  371. <div class="line"><a name="l00464"></a><span class="lineno"><a class="line" href="structcensus__view__aggregation__data.html">  464</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span>{</div>
    372. 

  372. <div class="line"><a name="l00465"></a><span class="lineno"><a class="line" href="structcensus__view__aggregation__data.html#a6f41772e2252f9137b17b16ed337c370">  465</a></span>&#160;  <span class="keyword">const</span> <a class="code" href="census_8h.html#afc68a73849e0d1565e74c28c822bb086">census_tag_set</a> *<a class="code" href="structcensus__view__aggregation__data.html#a6f41772e2252f9137b17b16ed337c370">tags</a>; <span class="comment">/* Tags for this set of aggregations. */</span></div>
    373. 

  373. <div class="line"><a name="l00466"></a><span class="lineno"><a class="line" href="structcensus__view__aggregation__data.html#a9147e9464bd963144649d773fc62398d">  466</a></span>&#160;  <span class="keyword">const</span> <span class="keywordtype">void</span> **<a class="code" href="structcensus__view__aggregation__data.html#a9147e9464bd963144649d773fc62398d">data</a>; <span class="comment">/* One data set for every aggregation in the view. */</span></div>
    374. 

  374. <div class="line"><a name="l00467"></a><span class="lineno">  467</span>&#160;} <a class="code" href="structcensus__view__aggregation__data.html">census_view_aggregation_data</a>;</div>
    375. 

  375. <div class="line"><a name="l00468"></a><span class="lineno">  468</span>&#160;</div>
    376. 

  376. <div class="line"><a name="l00470"></a><span class="lineno"><a class="line" href="structcensus__view__data.html">  470</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span>{</div>
    377. 

  377. <div class="line"><a name="l00471"></a><span class="lineno"><a class="line" href="structcensus__view__data.html#a90105c30b6a4b32ced7663532de301f4">  471</a></span>&#160;  <span class="keywordtype">size_t</span> <a class="code" href="structcensus__view__data.html#a90105c30b6a4b32ced7663532de301f4">n_tag_sets</a>; <span class="comment">/* Number of unique tag sets that matched view. */</span></div>
    378. 

  378. <div class="line"><a name="l00472"></a><span class="lineno"><a class="line" href="structcensus__view__data.html#ad3ad052b9c598a32650bb00690f478b8">  472</a></span>&#160;  <span class="keyword">const</span> <a class="code" href="structcensus__view__aggregation__data.html">census_view_aggregation_data</a> *<a class="code" href="structcensus__view__data.html#ad3ad052b9c598a32650bb00690f478b8">data</a>; <span class="comment">/* n_tag_sets entries */</span></div>
    379. 

  379. <div class="line"><a name="l00473"></a><span class="lineno">  473</span>&#160;} <a class="code" href="structcensus__view__data.html">census_view_data</a>;</div>
    380. 

  380. <div class="line"><a name="l00474"></a><span class="lineno">  474</span>&#160;</div>
    381. 

  381. <div class="line"><a name="l00479"></a><span class="lineno">  479</span>&#160;<span class="keyword">const</span> <a class="code" href="structcensus__view__data.html">census_view_data</a> *<a class="code" href="census_8h.html#ab7146edc8582fe2e6dc537f006e29cc5">census_view_get_data</a>(<span class="keyword">const</span> <a class="code" href="census_8h.html#ae43cfb236f1c79eeefb4d9bdf91e3aed">census_view</a> *view);</div>
    382. 

  382. <div class="line"><a name="l00480"></a><span class="lineno">  480</span>&#160;</div>
    383. 

  383. <div class="line"><a name="l00482"></a><span class="lineno">  482</span>&#160;<span class="keywordtype">void</span> <a class="code" href="census_8h.html#ad150387e14628665613f1d9a3d27a418">census_view_reset</a>(<a class="code" href="census_8h.html#ae43cfb236f1c79eeefb4d9bdf91e3aed">census_view</a> *view);</div>
    384. 

  384. <div class="line"><a name="l00483"></a><span class="lineno">  483</span>&#160;</div>
    385. 

  385. <div class="line"><a name="l00484"></a><span class="lineno">  484</span>&#160;<span class="preprocessor">#ifdef __cplusplus</span></div>
    386. 

  386. <div class="line"><a name="l00485"></a><span class="lineno">  485</span>&#160;<span class="preprocessor"></span>}</div>
    387. 

  387. <div class="line"><a name="l00486"></a><span class="lineno">  486</span>&#160;<span class="preprocessor">#endif</span></div>
    388. 

  388. <div class="line"><a name="l00487"></a><span class="lineno">  487</span>&#160;<span class="preprocessor"></span></div>
    389. 

  389. <div class="line"><a name="l00488"></a><span class="lineno">  488</span>&#160;<span class="preprocessor">#endif </span><span class="comment">/* CENSUS_CENSUS_H */</span><span class="preprocessor"></span></div>
    390. 

  390. <div class="ttc" id="structcensus__view__aggregation__data_html_a6f41772e2252f9137b17b16ed337c370"><div class="ttname"><a href="structcensus__view__aggregation__data.html#a6f41772e2252f9137b17b16ed337c370">census_view_aggregation_data::tags</a></div><div class="ttdeci">const census_tag_set * tags</div><div class="ttdef"><b>Definition:</b> census.h:465</div></div>
    391. 

  391. <div class="ttc" id="census_8h_html_a22bfed34d03c9f9f061f7aaf5fc5378c"><div class="ttname"><a href="census_8h.html#a22bfed34d03c9f9f061f7aaf5fc5378c">census_agg_histogram</a></div><div class="ttdeci">census_aggregation_ops census_agg_histogram</div></div>
    392. 

  392. <div class="ttc" id="census_8h_html_ab7146edc8582fe2e6dc537f006e29cc5"><div class="ttname"><a href="census_8h.html#ab7146edc8582fe2e6dc537f006e29cc5">census_view_get_data</a></div><div class="ttdeci">const census_view_data * census_view_get_data(const census_view *view)</div><div class="ttdoc">Get data from aggregations associated with a view. </div></div>
    393. 

  393. <div class="ttc" id="census_8h_html_a07ccf6250c7e2d4ef7180c510fd68ab2"><div class="ttname"><a href="census_8h.html#a07ccf6250c7e2d4ef7180c510fd68ab2">census_tag_set_destroy</a></div><div class="ttdeci">void census_tag_set_destroy(census_tag_set *tags)</div></div>
    394. 

  394. <div class="ttc" id="census_8h_html_a31151a1bca352d6046e6039fa864808c"><div class="ttname"><a href="census_8h.html#a31151a1bca352d6046e6039fa864808c">census_get_trace_record</a></div><div class="ttdeci">int census_get_trace_record(census_trace_record *trace_record)</div><div class="ttdoc">Get a trace record. </div></div>
    395. 

  395. <div class="ttc" id="census_8h_html_a14f21902360aa221e6307cec05a110a5"><div class="ttname"><a href="census_8h.html#a14f21902360aa221e6307cec05a110a5">census_tag_set_create</a></div><div class="ttdeci">census_tag_set * census_tag_set_create(size_t size_hint)</div></div>
    396. 

  396. <div class="ttc" id="census_8h_html_ac993f47fe73f67e5f8c8f4b00c358144"><div class="ttname"><a href="census_8h.html#ac993f47fe73f67e5f8c8f4b00c358144">census_view_naggregations</a></div><div class="ttdeci">size_t census_view_naggregations(const census_view *view)</div><div class="ttdoc">Number of aggregations associated with view. </div></div>
    397. 

  397. <div class="ttc" id="census_8h_html_aa5741f85edf5b3e72f89797ae85463b0"><div class="ttname"><a href="census_8h.html#aa5741f85edf5b3e72f89797ae85463b0">census_view_metric</a></div><div class="ttdeci">size_t census_view_metric(const census_view *view)</div><div class="ttdoc">Metric ID associated with a view. </div></div>
    398. 

  398. <div class="ttc" id="census_8h_html_a2b2990a51808c9177b14476195a9fb94"><div class="ttname"><a href="census_8h.html#a2b2990a51808c9177b14476195a9fb94">census_aggregation_ops</a></div><div class="ttdeci">struct census_aggregation_ops census_aggregation_ops</div><div class="ttdoc">Type representing a particular aggregation. </div><div class="ttdef"><b>Definition:</b> census.h:415</div></div>
    399. 

  399. <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:405</div></div>
    400. 

  400. <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:407</div></div>
    401. 

  401. <div class="ttc" id="census_8h_html_ae43cfb236f1c79eeefb4d9bdf91e3aed"><div class="ttname"><a href="census_8h.html#ae43cfb236f1c79eeefb4d9bdf91e3aed">census_view</a></div><div class="ttdeci">struct census_view census_view</div><div class="ttdoc">A census view type. </div><div class="ttdef"><b>Definition:</b> census.h:432</div></div>
    402. 

  402. <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>
    403. 

  403. <div class="ttc" id="structcensus__view__aggregation__data_html"><div class="ttname"><a href="structcensus__view__aggregation__data.html">census_view_aggregation_data</a></div><div class="ttdoc">Holds all the aggregation data for a particular view instantiation. </div><div class="ttdef"><b>Definition:</b> census.h:464</div></div>
    404. 

  404. <div class="ttc" id="structcensus__view__aggregation__data_html_a9147e9464bd963144649d773fc62398d"><div class="ttname"><a href="structcensus__view__aggregation__data.html#a9147e9464bd963144649d773fc62398d">census_view_aggregation_data::data</a></div><div class="ttdeci">const void ** data</div><div class="ttdef"><b>Definition:</b> census.h:466</div></div>
    405. 

  405. <div class="ttc" id="structcensus__view__data_html_ad3ad052b9c598a32650bb00690f478b8"><div class="ttname"><a href="structcensus__view__data.html#ad3ad052b9c598a32650bb00690f478b8">census_view_data::data</a></div><div class="ttdeci">const census_view_aggregation_data * data</div><div class="ttdef"><b>Definition:</b> census.h:472</div></div>
    406. 

  406. <div class="ttc" id="census_8h_html_a14287fdb8adc322c1801435eb121e642"><div class="ttname"><a href="census_8h.html#a14287fdb8adc322c1801435eb121e642">census_start_op</a></div><div class="ttdeci">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>
    407. 

  407. <div class="ttc" id="census_8h_html_aae5c38cb581600a401d1f8dca741bf63"><div class="ttname"><a href="census_8h.html#aae5c38cb581600a401d1f8dca741bf63">census_tag_set_open</a></div><div class="ttdeci">census_tag_set_iterator * census_tag_set_open(census_tag_set *tags)</div></div>
    408. 

  408. <div class="ttc" id="census_8h_html_adee01ffd0c56ca2c8c90919a73c3f8ba"><div class="ttname"><a href="census_8h.html#adee01ffd0c56ca2c8c90919a73c3f8ba">census_trace_scan_end</a></div><div class="ttdeci">void census_trace_scan_end()</div><div class="ttdoc">End a scan previously started by census_trace_scan_start() </div></div>
    409. 

  409. <div class="ttc" id="structcensus__aggregation_html"><div class="ttname"><a href="structcensus__aggregation.html">census_aggregation</a></div><div class="ttdoc">Information needed to instantiate a new aggregation. </div><div class="ttdef"><b>Definition:</b> census.h:425</div></div>
    410. 

  410. <div class="ttc" id="census_8h_html_ac690af8a7c06c6fb152fc9b0b8efc142"><div class="ttname"><a href="census_8h.html#ac690af8a7c06c6fb152fc9b0b8efc142">census_tag_set_add</a></div><div class="ttdeci">int census_tag_set_add(census_tag_set *tags, const char *key, const char *value)</div></div>
    411. 

  411. <div class="ttc" id="census_8h_html_a4cea92157f3de215724f6bf4aeaee1b6"><div class="ttname"><a href="census_8h.html#a4cea92157f3de215724f6bf4aeaee1b6">census_initialize</a></div><div class="ttdeci">int census_initialize(int features)</div><div class="ttdoc">Shutdown and startup census subsystem. </div></div>
    412. 

  412. <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>
    413. 

  413. <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:293</div></div>
    414. 

  414. <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:97</div></div>
    415. 

  415. <div class="ttc" id="census_8h_html_a71b2afd7a1663c2a716af7242895442b"><div class="ttname"><a href="census_8h.html#a71b2afd7a1663c2a716af7242895442b">census_start_rpc_op_timestamp</a></div><div class="ttdeci">census_timestamp census_start_rpc_op_timestamp(void)</div><div class="ttdoc">Mark the beginning of an RPC operation. </div></div>
    416. 

  416. <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:168</div></div>
    417. 

  417. <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>
    418. 

  418. <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>
    419. 

  419. <div class="ttc" id="port__platform_8h_html_aa6abd4df815a5498d1a04b5e691a74a9"><div class="ttname"><a href="port__platform_8h.html#aa6abd4df815a5498d1a04b5e691a74a9">gpr_uint32</a></div><div class="ttdeci">uint32_t gpr_uint32</div><div class="ttdef"><b>Definition:</b> port_platform.h:322</div></div>
    420. 

  420. <div class="ttc" id="census_8h_html_af3822f36fcbca23a3af9d3e8b3fb3317"><div class="ttname"><a href="census_8h.html#af3822f36fcbca23a3af9d3e8b3fb3317">census_trace_print</a></div><div class="ttdeci">void census_trace_print(census_context *context, gpr_uint32 type, const char *buffer, size_t n)</div><div class="ttdoc">Insert a trace record into the trace stream. </div></div>
    421. 

  421. <div class="ttc" id="census_8h_html_aa792b067548ecdd987d560b492c83d85"><div class="ttname"><a href="census_8h.html#aa792b067548ecdd987d560b492c83d85">census_shutdown</a></div><div class="ttdeci">void census_shutdown(void)</div></div>
    422. 

  422. <div class="ttc" id="structcensus__aggregation_html_afce3bda99fdeb6c77dde6368e1c45ffa"><div class="ttname"><a href="structcensus__aggregation.html#afce3bda99fdeb6c77dde6368e1c45ffa">census_aggregation::ops</a></div><div class="ttdeci">const census_aggregation_ops * ops</div><div class="ttdef"><b>Definition:</b> census.h:426</div></div>
    423. 

  423. <div class="ttc" id="census_8h_html_ab7014fb10de411a91588f05658148177"><div class="ttname"><a href="census_8h.html#ab7014fb10de411a91588f05658148177">census_start_server_rpc_op</a></div><div class="ttdeci">census_context * census_start_server_rpc_op(const char *buffer, gpr_int64 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>
    424. 

  424. <div class="ttc" id="census_8h_html_ab93305c7e6b04cd51f95aa497227f53a"><div class="ttname"><a href="census_8h.html#ab93305c7e6b04cd51f95aa497227f53a">census_trace_scan_start</a></div><div class="ttdeci">int census_trace_scan_start(int consume)</div><div class="ttdoc">Start a scan of existing trace records. </div></div>
    425. 

  425. <div class="ttc" id="census_8h_html_a2762b05c4e9bb8a6994519725cb69a84"><div class="ttname"><a href="census_8h.html#a2762b05c4e9bb8a6994519725cb69a84">census_set_trace_mask</a></div><div class="ttdeci">void census_set_trace_mask(int trace_mask)</div><div class="ttdoc">Set the trace mask associated with a context. </div></div>
    426. 

  426. <div class="ttc" id="census_8h_html_acbca4449a68fd3e2c17f1e0bcf1e663a"><div class="ttname"><a href="census_8h.html#acbca4449a68fd3e2c17f1e0bcf1e663a">census_tag_set_close</a></div><div class="ttdeci">void census_tag_set_close(census_tag_set_iterator *it)</div></div>
    427. 

  427. <div class="ttc" id="census_8h_html_a03847b518034c5c3b801fdd95569f400"><div class="ttname"><a href="census_8h.html#a03847b518034c5c3b801fdd95569f400">census_tag_set_next</a></div><div class="ttdeci">int census_tag_set_next(census_tag_set_iterator *it, census_tag_const *tag)</div></div>
    428. 

  428. <div class="ttc" id="census_8h_html_a529bb89984b69da3b4cab9deb68175a9"><div class="ttname"><a href="census_8h.html#a529bb89984b69da3b4cab9deb68175a9">census_view_delete</a></div><div class="ttdeci">void census_view_delete(census_view *view)</div><div class="ttdoc">Destroy a previously created view. </div></div>
    429. 

  429. <div class="ttc" id="census_8h_html_afeb62854542a09290181209ea72b9158"><div class="ttname"><a href="census_8h.html#afeb62854542a09290181209ea72b9158">census_trace_mask</a></div><div class="ttdeci">int census_trace_mask(const census_context *context)</div><div class="ttdoc">Get the current trace mask associated with this context. </div></div>
    430. 

  430. <div class="ttc" id="census_8h_html_a3bf772ddda26227f485b375192af85f2"><div class="ttname"><a href="census_8h.html#a3bf772ddda26227f485b375192af85f2">census_view_create</a></div><div class="ttdeci">census_view * census_view_create(gpr_uint32 metric_id, const census_tag_set *tags, const census_aggregation *aggregations, size_t naggregations)</div><div class="ttdoc">Create a new view. </div></div>
    431. 

  431. <div class="ttc" id="census_8h_html_ab40a6a544d107b067eb5ca8326efeded"><div class="ttname"><a href="census_8h.html#ab40a6a544d107b067eb5ca8326efeded">census_view_aggregrations</a></div><div class="ttdeci">const census_aggregation * census_view_aggregrations(const census_view *view)</div><div class="ttdoc">Get aggregation descriptors associated with a view. </div></div>
    432. 

  432. <div class="ttc" id="structcensus__view__data_html_a90105c30b6a4b32ced7663532de301f4"><div class="ttname"><a href="structcensus__view__data.html#a90105c30b6a4b32ced7663532de301f4">census_view_data::n_tag_sets</a></div><div class="ttdeci">size_t n_tag_sets</div><div class="ttdef"><b>Definition:</b> census.h:471</div></div>
    433. 

  433. <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:294</div></div>
    434. 

  434. <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:138</div></div>
    435. 

  435. <div class="ttc" id="census_8h_html_a37ac21fb6ba91fc1f80523cf3d55dbfa"><div class="ttname"><a href="census_8h.html#a37ac21fb6ba91fc1f80523cf3d55dbfa">census_agg_distribution</a></div><div class="ttdeci">census_aggregation_ops census_agg_distribution</div></div>
    436. 

  436. <div class="ttc" id="port__platform_8h_html_a71edab4bc3421f129764e5cb342f7181"><div class="ttname"><a href="port__platform_8h.html#a71edab4bc3421f129764e5cb342f7181">gpr_int64</a></div><div class="ttdeci">int64_t gpr_int64</div><div class="ttdef"><b>Definition:</b> port_platform.h:319</div></div>
    437. 

  437. <div class="ttc" id="census_8h_html_afc68a73849e0d1565e74c28c822bb086"><div class="ttname"><a href="census_8h.html#afc68a73849e0d1565e74c28c822bb086">census_tag_set</a></div><div class="ttdeci">struct census_tag_set census_tag_set</div><div class="ttdef"><b>Definition:</b> census.h:335</div></div>
    438. 

  438. <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:135</div></div>
    439. 

  439. <div class="ttc" id="structcensus__tag__const_html_aaffe4ea2b11ae8cfde18e5b99c4536d2"><div class="ttname"><a href="structcensus__tag__const.html#aaffe4ea2b11ae8cfde18e5b99c4536d2">census_tag_const::key</a></div><div class="ttdeci">const char * key</div><div class="ttdef"><b>Definition:</b> census.h:362</div></div>
    440. 

  440. <div class="ttc" id="census_8h_html_ad5f627a64ac4febbc61d2b89801d40e9"><div class="ttname"><a href="census_8h.html#ad5f627a64ac4febbc61d2b89801d40e9">census_supported</a></div><div class="ttdeci">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>
    441. 

  441. <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:99</div></div>
    442. 

  442. <div class="ttc" id="census_8h_html_a35d6ca1b9557bb6e12d79e137a5df944"><div class="ttname"><a href="census_8h.html#a35d6ca1b9557bb6e12d79e137a5df944">census_agg_sum</a></div><div class="ttdeci">census_aggregation_ops census_agg_sum</div></div>
    443. 

  443. <div class="ttc" id="census_8h_html_a054543816f063d003a36316fda4547b8"><div class="ttname"><a href="census_8h.html#a054543816f063d003a36316fda4547b8">census_view_tags</a></div><div class="ttdeci">const census_tag_set * census_view_tags(const census_view *view)</div><div class="ttdoc">Get tags associated with view. </div></div>
    444. 

  444. <div class="ttc" id="structcensus__value_html_a1e644fb8e7b1d8e6b06e717f00658522"><div class="ttname"><a href="structcensus__value.html#a1e644fb8e7b1d8e6b06e717f00658522">census_value::metric_id</a></div><div class="ttdeci">gpr_uint32 metric_id</div><div class="ttdef"><b>Definition:</b> census.h:406</div></div>
    445. 

  445. <div class="ttc" id="census_8h_html_ad150387e14628665613f1d9a3d27a418"><div class="ttname"><a href="census_8h.html#ad150387e14628665613f1d9a3d27a418">census_view_reset</a></div><div class="ttdeci">void census_view_reset(census_view *view)</div><div class="ttdoc">Reset all view data to zero for the specified view. </div></div>
    446. 

  446. <div class="ttc" id="census_8h_html_a0f2a69b151eac68f3c50806d2162d9f4"><div class="ttname"><a href="census_8h.html#a0f2a69b151eac68f3c50806d2162d9f4">census_start_client_rpc_op</a></div><div class="ttdeci">census_context * census_start_client_rpc_op(const census_context *context, gpr_int64 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>
    447. 

  447. <div class="ttc" id="census_8h_html_a78ec7fa52ea54e631bb11d59a8adba33"><div class="ttname"><a href="census_8h.html#a78ec7fa52ea54e631bb11d59a8adba33">census_context_tag_set</a></div><div class="ttdeci">census_tag_set * census_context_tag_set(census_context *context)</div></div>
    448. 

  448. <div class="ttc" id="structcensus__tag__const_html_a27fd204425bf861f10cd26df3dd6fb27"><div class="ttname"><a href="structcensus__tag__const.html#a27fd204425bf861f10cd26df3dd6fb27">census_tag_const::value</a></div><div class="ttdeci">const char * value</div><div class="ttdef"><b>Definition:</b> census.h:364</div></div>
    449. 

  449. <div class="ttc" id="structcensus__trace__record_html_a9bb150a1752a810cde915432976f1839"><div class="ttname"><a href="structcensus__trace__record.html#a9bb150a1752a810cde915432976f1839">census_trace_record::op_id</a></div><div class="ttdeci">gpr_uint64 op_id</div><div class="ttdef"><b>Definition:</b> census.h:296</div></div>
    450. 

  450. <div class="ttc" id="structcensus__view__data_html"><div class="ttname"><a href="structcensus__view__data.html">census_view_data</a></div><div class="ttdoc">Census view data as returned by census_view_get_data(). </div><div class="ttdef"><b>Definition:</b> census.h:470</div></div>
    451. 

  451. <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>
    452. 

  452. <div class="ttc" id="census_8h_html_a1225e8bbc14ff51173b6485940940572"><div class="ttname"><a href="census_8h.html#a1225e8bbc14ff51173b6485940940572">census_record_values</a></div><div class="ttdeci">void census_record_values(census_context *context, census_value *values, size_t nvalues)</div></div>
    453. 

  453. <div class="ttc" id="census_8h_html_a97a3300020cdacd7149e0efae9f5541e"><div class="ttname"><a href="census_8h.html#a97a3300020cdacd7149e0efae9f5541e">census_end_op</a></div><div class="ttdeci">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>
    454. 

  454. <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> time.h:63</div></div>
    455. 

  455. <div class="ttc" id="port__platform_8h_html_a737bb95b7b58d90b4215602d36ed65b6"><div class="ttname"><a href="port__platform_8h.html#a737bb95b7b58d90b4215602d36ed65b6">gpr_uint64</a></div><div class="ttdeci">uint64_t gpr_uint64</div><div class="ttdef"><b>Definition:</b> port_platform.h:323</div></div>
    456. 

  456. <div class="ttc" id="census_8h_html_a22a740b7e9e3798cb9208b3bd6ea31a7"><div class="ttname"><a href="census_8h.html#a22a740b7e9e3798cb9208b3bd6ea31a7">census_tag_set_iterator</a></div><div class="ttdeci">struct census_tag_set_iterator census_tag_set_iterator</div><div class="ttdef"><b>Definition:</b> census.h:368</div></div>
    457. 

  457. <div class="ttc" id="structcensus__aggregation_html_a5b2ce3ab21a88058ea67c944d6a37426"><div class="ttname"><a href="structcensus__aggregation.html#a5b2ce3ab21a88058ea67c944d6a37426">census_aggregation::create_arg</a></div><div class="ttdeci">const void * create_arg</div><div class="ttdef"><b>Definition:</b> census.h:428</div></div>
    458. 

  458. <div class="ttc" id="census_8h_html_a06407a753c261626b4e25c4f6fe0b840"><div class="ttname"><a href="census_8h.html#a06407a753c261626b4e25c4f6fe0b840">census_set_rpc_client_peer</a></div><div class="ttdeci">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>
    459. 

  459. <div class="ttc" id="census_8h_html_a742616973e78aaf969389cea20feea9f"><div class="ttname"><a href="census_8h.html#a742616973e78aaf969389cea20feea9f">census_enabled</a></div><div class="ttdeci">int census_enabled(void)</div><div class="ttdoc">Return the census features currently enabled. </div></div>
    460. 

  460. <div class="ttc" id="structcensus__tag__const_html_ac7dd97b14d839f337d34ef5c6d3f882a"><div class="ttname"><a href="structcensus__tag__const.html#ac7dd97b14d839f337d34ef5c6d3f882a">census_tag_const::value_len</a></div><div class="ttdeci">size_t value_len</div><div class="ttdef"><b>Definition:</b> census.h:363</div></div>
    461. 

  461. <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:98</div></div>
    462. 

  462. <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:298</div></div>
    463. 

  463. <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:299</div></div>
    464. 

  464. <div class="ttc" id="grpc_8h_html"><div class="ttname"><a href="grpc_8h.html">grpc.h</a></div></div>
    465. 

  465. <div class="ttc" id="structcensus__tag__const_html_a0da666348257edd491a26528e6bacc8f"><div class="ttname"><a href="structcensus__tag__const.html#a0da666348257edd491a26528e6bacc8f">census_tag_const::key_len</a></div><div class="ttdeci">size_t key_len</div><div class="ttdef"><b>Definition:</b> census.h:361</div></div>
    466. 

  466. <div class="ttc" id="census_8h_html_a4b8a7f096dcd85c93f823cddb2bf960e"><div class="ttname"><a href="census_8h.html#a4b8a7f096dcd85c93f823cddb2bf960e">census_agg_window</a></div><div class="ttdeci">census_aggregation_ops census_agg_window</div></div>
    467. 

  467. <div class="ttc" id="census_8h_html_ad9a7d3170ecf720e1b22a4f255605748"><div class="ttname"><a href="census_8h.html#ad9a7d3170ecf720e1b22a4f255605748">census_context_serialize</a></div><div class="ttdeci">size_t census_context_serialize(const census_context *context, char *buffer, size_t buf_size)</div></div>
    468. 

  468. <div class="ttc" id="structcensus__tag__const_html"><div class="ttname"><a href="structcensus__tag__const.html">census_tag_const</a></div><div class="ttdef"><b>Definition:</b> census.h:360</div></div>
    469. 

  469. <div class="ttc" id="structcensus__trace__record_html_a7d12a98b15db3199dc221a1be036088b"><div class="ttname"><a href="structcensus__trace__record.html#a7d12a98b15db3199dc221a1be036088b">census_trace_record::trace_id</a></div><div class="ttdeci">gpr_uint64 trace_id</div><div class="ttdef"><b>Definition:</b> census.h:295</div></div>
    470. 

  470. <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">Context is a handle used by census to represent the current tracing and tagging information. </div><div class="ttdef"><b>Definition:</b> census.h:80</div></div>
    471. 

  471. <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>
    472. 

  472. <div class="ttc" id="structcensus__trace__record_html_a827fe499f3c0777ae1dcb3969943e7fc"><div class="ttname"><a href="structcensus__trace__record.html#a827fe499f3c0777ae1dcb3969943e7fc">census_trace_record::type</a></div><div class="ttdeci">gpr_uint32 type</div><div class="ttdef"><b>Definition:</b> census.h:297</div></div>
    473. 

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