support_2sync_8h_source.html 47 KB

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  68. <div class="title">sync.h</div> </div>
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  71. <a href="support_2sync_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>
  72. <div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment"> *</span></div>
  73. <div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment"> * Copyright 2015 gRPC authors.</span></div>
  74. <div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment"> *</span></div>
  75. <div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"> * Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);</span></div>
  76. <div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"> * you may not use this file except in compliance with the License.</span></div>
  77. <div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"> * You may obtain a copy of the License at</span></div>
  78. <div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment"> *</span></div>
  79. <div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div>
  80. <div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment"> *</span></div>
  81. <div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment"> * Unless required by applicable law or agreed to in writing, software</span></div>
  82. <div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="comment"> * distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span></div>
  83. <div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
  84. <div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment"> * See the License for the specific language governing permissions and</span></div>
  85. <div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="comment"> * limitations under the License.</span></div>
  86. <div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment"> *</span></div>
  87. <div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="comment"> */</span></div>
  88. <div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160; </div>
  89. <div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="preprocessor">#ifndef GRPC_SUPPORT_SYNC_H</span></div>
  90. <div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="preprocessor">#define GRPC_SUPPORT_SYNC_H</span></div>
  91. <div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160; </div>
  92. <div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="support_2port__platform_8h.html">grpc/support/port_platform.h</a>&gt;</span></div>
  93. <div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160; </div>
  94. <div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="gpr__types_8h.html">grpc/impl/codegen/gpr_types.h</a>&gt;</span> <span class="comment">/* for gpr_timespec */</span></div>
  95. <div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="impl_2codegen_2sync_8h.html">grpc/impl/codegen/sync.h</a>&gt;</span></div>
  96. <div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160; </div>
  97. <div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="preprocessor">#ifdef __cplusplus</span></div>
  98. <div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="keyword">extern</span> <span class="stringliteral">&quot;C&quot;</span> {</div>
  99. <div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="preprocessor">#endif</span></div>
  100. <div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; </div>
  101. <div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span> <a class="code" href="support_2sync_8h.html#a989fb0f141d90a05b20425ebdc77936d">gpr_mu_init</a>(<a class="code" href="impl_2codegen_2sync__posix_8h.html#aa66fb6a11304ef6759d76f84a34ee28f">gpr_mu</a>* mu);</div>
  102. <div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; </div>
  103. <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span> <a class="code" href="support_2sync_8h.html#a23567fcb3d8a7d5f29834ddbcbbe1d1d">gpr_mu_destroy</a>(<a class="code" href="impl_2codegen_2sync__posix_8h.html#aa66fb6a11304ef6759d76f84a34ee28f">gpr_mu</a>* mu);</div>
  104. <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; </div>
  105. <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span> <a class="code" href="support_2sync_8h.html#a7001a8164ce893911acf26d2fb8fd2ba">gpr_mu_lock</a>(<a class="code" href="impl_2codegen_2sync__posix_8h.html#aa66fb6a11304ef6759d76f84a34ee28f">gpr_mu</a>* mu);</div>
  106. <div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; </div>
  107. <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span> <a class="code" href="support_2sync_8h.html#af0e6cc39401a0ee35b728f5b88135376">gpr_mu_unlock</a>(<a class="code" href="impl_2codegen_2sync__posix_8h.html#aa66fb6a11304ef6759d76f84a34ee28f">gpr_mu</a>* mu);</div>
  108. <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; </div>
  109. <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">int</span> <a class="code" href="support_2sync_8h.html#a18765dc6c6292b12388a68eb541419a8">gpr_mu_trylock</a>(<a class="code" href="impl_2codegen_2sync__posix_8h.html#aa66fb6a11304ef6759d76f84a34ee28f">gpr_mu</a>* mu);</div>
  110. <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; </div>
  111. <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span> <a class="code" href="support_2sync_8h.html#a112715bd2e69d92010a6317c839eb36f">gpr_cv_init</a>(<a class="code" href="impl_2codegen_2sync__posix_8h.html#a1ad613e07180c0459cda9f3f6d881885">gpr_cv</a>* cv);</div>
  112. <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; </div>
  113. <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span> <a class="code" href="support_2sync_8h.html#a053788a2217043c527afc8b424568b22">gpr_cv_destroy</a>(<a class="code" href="impl_2codegen_2sync__posix_8h.html#a1ad613e07180c0459cda9f3f6d881885">gpr_cv</a>* cv);</div>
  114. <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; </div>
  115. <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">int</span> <a class="code" href="support_2sync_8h.html#adf647f6e8dede8b27ccda9e971ae4971">gpr_cv_wait</a>(<a class="code" href="impl_2codegen_2sync__posix_8h.html#a1ad613e07180c0459cda9f3f6d881885">gpr_cv</a>* cv, <a class="code" href="impl_2codegen_2sync__posix_8h.html#aa66fb6a11304ef6759d76f84a34ee28f">gpr_mu</a>* mu, <a class="code" href="structgpr__timespec.html">gpr_timespec</a> abs_deadline);</div>
  116. <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; </div>
  117. <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span> <a class="code" href="support_2sync_8h.html#abf066e257012246303a938350d1546a0">gpr_cv_signal</a>(<a class="code" href="impl_2codegen_2sync__posix_8h.html#a1ad613e07180c0459cda9f3f6d881885">gpr_cv</a>* cv);</div>
  118. <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; </div>
  119. <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span> <a class="code" href="support_2sync_8h.html#a684cb215f9f840791372180a810b405d">gpr_cv_broadcast</a>(<a class="code" href="impl_2codegen_2sync__posix_8h.html#a1ad613e07180c0459cda9f3f6d881885">gpr_cv</a>* cv);</div>
  120. <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; </div>
  121. <div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span> <a class="code" href="support_2sync_8h.html#ac6566f51f1304fec359b2b9cccc89f69">gpr_once_init</a>(<a class="code" href="impl_2codegen_2sync__posix_8h.html#a28731dc17a4158343f58f453a4d5e37f">gpr_once</a>* once, <span class="keywordtype">void</span> (*init_function)(<span class="keywordtype">void</span>));</div>
  122. <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; </div>
  123. <div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span> <a class="code" href="support_2sync_8h.html#a8c1e214b5ff9e8f25dfc785977d8a092">gpr_event_init</a>(<a class="code" href="structgpr__event.html">gpr_event</a>* ev);</div>
  124. <div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; </div>
  125. <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span> <a class="code" href="support_2sync_8h.html#a39a77b09ffc2c288b097c84c4e0e29a5">gpr_event_set</a>(<a class="code" href="structgpr__event.html">gpr_event</a>* ev, <span class="keywordtype">void</span>* value);</div>
  126. <div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; </div>
  127. <div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span>* <a class="code" href="support_2sync_8h.html#afb62d3857409962718465c407f97fec3">gpr_event_get</a>(<a class="code" href="structgpr__event.html">gpr_event</a>* ev);</div>
  128. <div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; </div>
  129. <div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span>* <a class="code" href="support_2sync_8h.html#acc62f586f166d0cbd2c3ba7a707ac5a3">gpr_event_wait</a>(<a class="code" href="structgpr__event.html">gpr_event</a>* ev, <a class="code" href="structgpr__timespec.html">gpr_timespec</a> abs_deadline);</div>
  130. <div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; </div>
  131. <div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span> <a class="code" href="support_2sync_8h.html#afb46be51462503426660193b7d49f599">gpr_ref_init</a>(<a class="code" href="structgpr__refcount.html">gpr_refcount</a>* r, <span class="keywordtype">int</span> n);</div>
  132. <div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160; </div>
  133. <div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span> <a class="code" href="support_2sync_8h.html#a2653bdd931dc3e35ef24f52b4ab074ee">gpr_ref</a>(<a class="code" href="structgpr__refcount.html">gpr_refcount</a>* r);</div>
  134. <div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; </div>
  135. <div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span> <a class="code" href="support_2sync_8h.html#ad152a5820acaa9ca6163bcbe45d078d6">gpr_ref_non_zero</a>(<a class="code" href="structgpr__refcount.html">gpr_refcount</a>* r);</div>
  136. <div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160; </div>
  137. <div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span> <a class="code" href="support_2sync_8h.html#a91472a0360a87654379b3b6eb0fe942e">gpr_refn</a>(<a class="code" href="structgpr__refcount.html">gpr_refcount</a>* r, <span class="keywordtype">int</span> n);</div>
  138. <div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; </div>
  139. <div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">int</span> <a class="code" href="support_2sync_8h.html#a244626eb1a00a846eb602820fc736f84">gpr_unref</a>(<a class="code" href="structgpr__refcount.html">gpr_refcount</a>* r);</div>
  140. <div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160; </div>
  141. <div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">int</span> <a class="code" href="support_2sync_8h.html#a532b23d0393bf91ebcc221f5855c17fa">gpr_ref_is_unique</a>(<a class="code" href="structgpr__refcount.html">gpr_refcount</a>* r);</div>
  142. <div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160; </div>
  143. <div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span> <a class="code" href="support_2sync_8h.html#a05c0002cb69dbce4d94819f65551fca2">gpr_stats_init</a>(<a class="code" href="structgpr__stats__counter.html">gpr_stats_counter</a>* c, intptr_t n);</div>
  144. <div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160; </div>
  145. <div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> <span class="keywordtype">void</span> <a class="code" href="support_2sync_8h.html#a8d1f3e75040086f0da4d7fc4e94a5b2b">gpr_stats_inc</a>(<a class="code" href="structgpr__stats__counter.html">gpr_stats_counter</a>* c, intptr_t inc);</div>
  146. <div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; </div>
  147. <div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160;<a class="code" href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a> intptr_t <a class="code" href="support_2sync_8h.html#ab451d39b50836fcad4ed48f080b7f648">gpr_stats_read</a>(<span class="keyword">const</span> <a class="code" href="structgpr__stats__counter.html">gpr_stats_counter</a>* c);</div>
  148. <div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160; </div>
  149. <div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160;<span class="preprocessor">#if 0</span></div>
  150. <div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160; </div>
  151. <div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160;<span class="preprocessor">#define N 4</span></div>
  152. <div class="line"><a name="l00181"></a><span class="lineno"> 181</span>&#160; </div>
  153. <div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160; <span class="keyword">typedef</span> <span class="keyword">struct </span>queue {</div>
  154. <div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160; <a class="code" href="impl_2codegen_2sync__posix_8h.html#a1ad613e07180c0459cda9f3f6d881885">gpr_cv</a> non_empty; <span class="comment">/* Signalled when length becomes non-zero. */</span></div>
  155. <div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160; <a class="code" href="impl_2codegen_2sync__posix_8h.html#a1ad613e07180c0459cda9f3f6d881885">gpr_cv</a> non_full; <span class="comment">/* Signalled when length becomes non-N. */</span></div>
  156. <div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160; <a class="code" href="impl_2codegen_2sync__posix_8h.html#aa66fb6a11304ef6759d76f84a34ee28f">gpr_mu</a> mu; <span class="comment">/* Protects all fields below.</span></div>
  157. <div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160;<span class="comment"> (That is, except during initialization or</span></div>
  158. <div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160;<span class="comment"> destruction, the fields below should be accessed</span></div>
  159. <div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160;<span class="comment"> only by a thread that holds mu.) */</span></div>
  160. <div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160; <span class="keywordtype">int</span> head; <span class="comment">/* Index of head of queue 0..N-1. */</span></div>
  161. <div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160; <span class="keywordtype">int</span> length; <span class="comment">/* Number of valid elements in queue 0..N. */</span></div>
  162. <div class="line"><a name="l00191"></a><span class="lineno"> 191</span>&#160; <span class="keywordtype">int</span> elem[N]; <span class="comment">/* elem[head .. head+length-1] are queue elements. */</span></div>
  163. <div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160; } queue;</div>
  164. <div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160; </div>
  165. <div class="line"><a name="l00194"></a><span class="lineno"> 194</span>&#160; <span class="comment">/* Initialize *q. */</span></div>
  166. <div class="line"><a name="l00195"></a><span class="lineno"> 195</span>&#160; <span class="keywordtype">void</span> queue_init(queue *q) {</div>
  167. <div class="line"><a name="l00196"></a><span class="lineno"> 196</span>&#160; <a class="code" href="support_2sync_8h.html#a989fb0f141d90a05b20425ebdc77936d">gpr_mu_init</a>(&amp;q-&gt;mu);</div>
  168. <div class="line"><a name="l00197"></a><span class="lineno"> 197</span>&#160; <a class="code" href="support_2sync_8h.html#a112715bd2e69d92010a6317c839eb36f">gpr_cv_init</a>(&amp;q-&gt;non_empty);</div>
  169. <div class="line"><a name="l00198"></a><span class="lineno"> 198</span>&#160; <a class="code" href="support_2sync_8h.html#a112715bd2e69d92010a6317c839eb36f">gpr_cv_init</a>(&amp;q-&gt;non_full);</div>
  170. <div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160; q-&gt;head = 0;</div>
  171. <div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160; q-&gt;length = 0;</div>
  172. <div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160; }</div>
  173. <div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160; </div>
  174. <div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160; <span class="comment">/* Free storage associated with *q. */</span></div>
  175. <div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; <span class="keywordtype">void</span> queue_destroy(queue *q) {</div>
  176. <div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160; <a class="code" href="support_2sync_8h.html#a23567fcb3d8a7d5f29834ddbcbbe1d1d">gpr_mu_destroy</a>(&amp;q-&gt;mu);</div>
  177. <div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160; <a class="code" href="support_2sync_8h.html#a053788a2217043c527afc8b424568b22">gpr_cv_destroy</a>(&amp;q-&gt;non_empty);</div>
  178. <div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; <a class="code" href="support_2sync_8h.html#a053788a2217043c527afc8b424568b22">gpr_cv_destroy</a>(&amp;q-&gt;non_full);</div>
  179. <div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160; }</div>
  180. <div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160; </div>
  181. <div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; <span class="comment">/* Wait until there is room in *q, then append x to *q. */</span></div>
  182. <div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160; <span class="keywordtype">void</span> queue_append(queue *q, <span class="keywordtype">int</span> x) {</div>
  183. <div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160; <a class="code" href="support_2sync_8h.html#a7001a8164ce893911acf26d2fb8fd2ba">gpr_mu_lock</a>(&amp;q-&gt;mu);</div>
  184. <div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; <span class="comment">/* To wait for a predicate without a deadline, loop on the negation of the</span></div>
  185. <div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160;<span class="comment"> predicate, and use gpr_cv_wait(..., gpr_inf_future) inside the loop</span></div>
  186. <div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160;<span class="comment"> to release the lock, wait, and reacquire on each iteration. Code that</span></div>
  187. <div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160;<span class="comment"> makes the condition true should use gpr_cv_broadcast() on the</span></div>
  188. <div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160;<span class="comment"> corresponding condition variable. The predicate must be on state</span></div>
  189. <div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160;<span class="comment"> protected by the lock. */</span></div>
  190. <div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160; <span class="keywordflow">while</span> (q-&gt;length == N) {</div>
  191. <div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160; <a class="code" href="support_2sync_8h.html#adf647f6e8dede8b27ccda9e971ae4971">gpr_cv_wait</a>(&amp;q-&gt;non_full, &amp;q-&gt;mu, <a class="code" href="time_8h.html#a57c9693ef253d0951363c5dafb6586df">gpr_inf_future</a>);</div>
  192. <div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160; }</div>
  193. <div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160; <span class="keywordflow">if</span> (q-&gt;length == 0) { <span class="comment">/* Wake threads blocked in queue_remove(). */</span></div>
  194. <div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160; <span class="comment">/* It&#39;s normal to use gpr_cv_broadcast() or gpr_signal() while</span></div>
  195. <div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160;<span class="comment"> holding the lock. */</span></div>
  196. <div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160; <a class="code" href="support_2sync_8h.html#a684cb215f9f840791372180a810b405d">gpr_cv_broadcast</a>(&amp;q-&gt;non_empty);</div>
  197. <div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160; }</div>
  198. <div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160; q-&gt;elem[(q-&gt;head + q-&gt;length) % N] = x;</div>
  199. <div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160; q-&gt;length++;</div>
  200. <div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160; <a class="code" href="support_2sync_8h.html#af0e6cc39401a0ee35b728f5b88135376">gpr_mu_unlock</a>(&amp;q-&gt;mu);</div>
  201. <div class="line"><a name="l00230"></a><span class="lineno"> 230</span>&#160; }</div>
  202. <div class="line"><a name="l00231"></a><span class="lineno"> 231</span>&#160; </div>
  203. <div class="line"><a name="l00232"></a><span class="lineno"> 232</span>&#160; <span class="comment">/* If it can be done without blocking, append x to *q and return non-zero.</span></div>
  204. <div class="line"><a name="l00233"></a><span class="lineno"> 233</span>&#160;<span class="comment"> Otherwise return 0. */</span></div>
  205. <div class="line"><a name="l00234"></a><span class="lineno"> 234</span>&#160; <span class="keywordtype">int</span> queue_try_append(queue *q, <span class="keywordtype">int</span> x) {</div>
  206. <div class="line"><a name="l00235"></a><span class="lineno"> 235</span>&#160; <span class="keywordtype">int</span> result = 0;</div>
  207. <div class="line"><a name="l00236"></a><span class="lineno"> 236</span>&#160; <span class="keywordflow">if</span> (<a class="code" href="support_2sync_8h.html#a18765dc6c6292b12388a68eb541419a8">gpr_mu_trylock</a>(&amp;q-&gt;mu)) {</div>
  208. <div class="line"><a name="l00237"></a><span class="lineno"> 237</span>&#160; <span class="keywordflow">if</span> (q-&gt;length != N) {</div>
  209. <div class="line"><a name="l00238"></a><span class="lineno"> 238</span>&#160; <span class="keywordflow">if</span> (q-&gt;length == 0) { <span class="comment">/* Wake threads blocked in queue_remove(). */</span></div>
  210. <div class="line"><a name="l00239"></a><span class="lineno"> 239</span>&#160; <a class="code" href="support_2sync_8h.html#a684cb215f9f840791372180a810b405d">gpr_cv_broadcast</a>(&amp;q-&gt;non_empty);</div>
  211. <div class="line"><a name="l00240"></a><span class="lineno"> 240</span>&#160; }</div>
  212. <div class="line"><a name="l00241"></a><span class="lineno"> 241</span>&#160; q-&gt;elem[(q-&gt;head + q-&gt;length) % N] = x;</div>
  213. <div class="line"><a name="l00242"></a><span class="lineno"> 242</span>&#160; q-&gt;length++;</div>
  214. <div class="line"><a name="l00243"></a><span class="lineno"> 243</span>&#160; result = 1;</div>
  215. <div class="line"><a name="l00244"></a><span class="lineno"> 244</span>&#160; }</div>
  216. <div class="line"><a name="l00245"></a><span class="lineno"> 245</span>&#160; <a class="code" href="support_2sync_8h.html#af0e6cc39401a0ee35b728f5b88135376">gpr_mu_unlock</a>(&amp;q-&gt;mu);</div>
  217. <div class="line"><a name="l00246"></a><span class="lineno"> 246</span>&#160; }</div>
  218. <div class="line"><a name="l00247"></a><span class="lineno"> 247</span>&#160; <span class="keywordflow">return</span> result;</div>
  219. <div class="line"><a name="l00248"></a><span class="lineno"> 248</span>&#160; }</div>
  220. <div class="line"><a name="l00249"></a><span class="lineno"> 249</span>&#160; </div>
  221. <div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160; <span class="comment">/* Wait until the *q is non-empty or deadline abs_deadline passes. If the</span></div>
  222. <div class="line"><a name="l00251"></a><span class="lineno"> 251</span>&#160;<span class="comment"> queue is non-empty, remove its head entry, place it in *head, and return</span></div>
  223. <div class="line"><a name="l00252"></a><span class="lineno"> 252</span>&#160;<span class="comment"> non-zero. Otherwise return 0. */</span></div>
  224. <div class="line"><a name="l00253"></a><span class="lineno"> 253</span>&#160; <span class="keywordtype">int</span> queue_remove(queue *q, <span class="keywordtype">int</span> *head, <a class="code" href="structgpr__timespec.html">gpr_timespec</a> abs_deadline) {</div>
  225. <div class="line"><a name="l00254"></a><span class="lineno"> 254</span>&#160; <span class="keywordtype">int</span> result = 0;</div>
  226. <div class="line"><a name="l00255"></a><span class="lineno"> 255</span>&#160; <a class="code" href="support_2sync_8h.html#a7001a8164ce893911acf26d2fb8fd2ba">gpr_mu_lock</a>(&amp;q-&gt;mu);</div>
  227. <div class="line"><a name="l00256"></a><span class="lineno"> 256</span>&#160; <span class="comment">/* To wait for a predicate with a deadline, loop on the negation of the</span></div>
  228. <div class="line"><a name="l00257"></a><span class="lineno"> 257</span>&#160;<span class="comment"> predicate or until gpr_cv_wait() returns true. Code that makes</span></div>
  229. <div class="line"><a name="l00258"></a><span class="lineno"> 258</span>&#160;<span class="comment"> the condition true should use gpr_cv_broadcast() on the corresponding</span></div>
  230. <div class="line"><a name="l00259"></a><span class="lineno"> 259</span>&#160;<span class="comment"> condition variable. The predicate must be on state protected by the</span></div>
  231. <div class="line"><a name="l00260"></a><span class="lineno"> 260</span>&#160;<span class="comment"> lock. */</span></div>
  232. <div class="line"><a name="l00261"></a><span class="lineno"> 261</span>&#160; <span class="keywordflow">while</span> (q-&gt;length == 0 &amp;&amp;</div>
  233. <div class="line"><a name="l00262"></a><span class="lineno"> 262</span>&#160; !<a class="code" href="support_2sync_8h.html#adf647f6e8dede8b27ccda9e971ae4971">gpr_cv_wait</a>(&amp;q-&gt;non_empty, &amp;q-&gt;mu, abs_deadline)) {</div>
  234. <div class="line"><a name="l00263"></a><span class="lineno"> 263</span>&#160; }</div>
  235. <div class="line"><a name="l00264"></a><span class="lineno"> 264</span>&#160; <span class="keywordflow">if</span> (q-&gt;length != 0) { <span class="comment">/* Queue is non-empty. */</span></div>
  236. <div class="line"><a name="l00265"></a><span class="lineno"> 265</span>&#160; result = 1;</div>
  237. <div class="line"><a name="l00266"></a><span class="lineno"> 266</span>&#160; <span class="keywordflow">if</span> (q-&gt;length == N) { <span class="comment">/* Wake threads blocked in queue_append(). */</span></div>
  238. <div class="line"><a name="l00267"></a><span class="lineno"> 267</span>&#160; <a class="code" href="support_2sync_8h.html#a684cb215f9f840791372180a810b405d">gpr_cv_broadcast</a>(&amp;q-&gt;non_full);</div>
  239. <div class="line"><a name="l00268"></a><span class="lineno"> 268</span>&#160; }</div>
  240. <div class="line"><a name="l00269"></a><span class="lineno"> 269</span>&#160; *head = q-&gt;elem[q-&gt;head];</div>
  241. <div class="line"><a name="l00270"></a><span class="lineno"> 270</span>&#160; q-&gt;head = (q-&gt;head + 1) % N;</div>
  242. <div class="line"><a name="l00271"></a><span class="lineno"> 271</span>&#160; q-&gt;length--;</div>
  243. <div class="line"><a name="l00272"></a><span class="lineno"> 272</span>&#160; } <span class="comment">/* else deadline exceeded */</span></div>
  244. <div class="line"><a name="l00273"></a><span class="lineno"> 273</span>&#160; <a class="code" href="support_2sync_8h.html#af0e6cc39401a0ee35b728f5b88135376">gpr_mu_unlock</a>(&amp;q-&gt;mu);</div>
  245. <div class="line"><a name="l00274"></a><span class="lineno"> 274</span>&#160; <span class="keywordflow">return</span> result;</div>
  246. <div class="line"><a name="l00275"></a><span class="lineno"> 275</span>&#160; }</div>
  247. <div class="line"><a name="l00276"></a><span class="lineno"> 276</span>&#160;<span class="preprocessor">#endif </span><span class="comment">/* 0 */</span><span class="preprocessor"></span></div>
  248. <div class="line"><a name="l00277"></a><span class="lineno"> 277</span>&#160; </div>
  249. <div class="line"><a name="l00278"></a><span class="lineno"> 278</span>&#160;<span class="preprocessor">#ifdef __cplusplus</span></div>
  250. <div class="line"><a name="l00279"></a><span class="lineno"> 279</span>&#160;} <span class="comment">// extern &quot;C&quot;</span></div>
  251. <div class="line"><a name="l00280"></a><span class="lineno"> 280</span>&#160;<span class="preprocessor">#endif</span></div>
  252. <div class="line"><a name="l00281"></a><span class="lineno"> 281</span>&#160; </div>
  253. <div class="line"><a name="l00282"></a><span class="lineno"> 282</span>&#160;<span class="preprocessor">#endif </span><span class="comment">/* GRPC_SUPPORT_SYNC_H */</span><span class="preprocessor"></span></div>
  254. </div><!-- fragment --></div><!-- contents -->
  255. <div class="ttc" id="asupport_2sync_8h_html_a2653bdd931dc3e35ef24f52b4ab074ee"><div class="ttname"><a href="support_2sync_8h.html#a2653bdd931dc3e35ef24f52b4ab074ee">gpr_ref</a></div><div class="ttdeci">GPRAPI void gpr_ref(gpr_refcount *r)</div><div class="ttdoc">Increment the reference count *r.</div></div>
  256. <div class="ttc" id="aimpl_2codegen_2sync__posix_8h_html_a28731dc17a4158343f58f453a4d5e37f"><div class="ttname"><a href="impl_2codegen_2sync__posix_8h.html#a28731dc17a4158343f58f453a4d5e37f">gpr_once</a></div><div class="ttdeci">pthread_once_t gpr_once</div><div class="ttdef"><b>Definition:</b> sync_posix.h:48</div></div>
  257. <div class="ttc" id="asupport_2sync_8h_html_a23567fcb3d8a7d5f29834ddbcbbe1d1d"><div class="ttname"><a href="support_2sync_8h.html#a23567fcb3d8a7d5f29834ddbcbbe1d1d">gpr_mu_destroy</a></div><div class="ttdeci">GPRAPI void gpr_mu_destroy(gpr_mu *mu)</div><div class="ttdoc">Cause *mu no longer to be initialized, freeing any memory in use.</div></div>
  258. <div class="ttc" id="asupport_2sync_8h_html_ac6566f51f1304fec359b2b9cccc89f69"><div class="ttname"><a href="support_2sync_8h.html#ac6566f51f1304fec359b2b9cccc89f69">gpr_once_init</a></div><div class="ttdeci">GPRAPI void gpr_once_init(gpr_once *once, void(*init_function)(void))</div><div class="ttdoc">— One-time initialization —</div></div>
  259. <div class="ttc" id="aimpl_2codegen_2sync__posix_8h_html_a1ad613e07180c0459cda9f3f6d881885"><div class="ttname"><a href="impl_2codegen_2sync__posix_8h.html#a1ad613e07180c0459cda9f3f6d881885">gpr_cv</a></div><div class="ttdeci">pthread_cond_t gpr_cv</div><div class="ttdef"><b>Definition:</b> sync_posix.h:46</div></div>
  260. <div class="ttc" id="asupport_2sync_8h_html_ab451d39b50836fcad4ed48f080b7f648"><div class="ttname"><a href="support_2sync_8h.html#ab451d39b50836fcad4ed48f080b7f648">gpr_stats_read</a></div><div class="ttdeci">GPRAPI intptr_t gpr_stats_read(const gpr_stats_counter *c)</div><div class="ttdoc">Return *c.</div></div>
  261. <div class="ttc" id="aimpl_2codegen_2port__platform_8h_html_af89d3610372fc35178e83e06916aa808"><div class="ttname"><a href="impl_2codegen_2port__platform_8h.html#af89d3610372fc35178e83e06916aa808">GPRAPI</a></div><div class="ttdeci">#define GPRAPI</div><div class="ttdef"><b>Definition:</b> port_platform.h:551</div></div>
  262. <div class="ttc" id="asupport_2sync_8h_html_adf647f6e8dede8b27ccda9e971ae4971"><div class="ttname"><a href="support_2sync_8h.html#adf647f6e8dede8b27ccda9e971ae4971">gpr_cv_wait</a></div><div class="ttdeci">GPRAPI int gpr_cv_wait(gpr_cv *cv, gpr_mu *mu, gpr_timespec abs_deadline)</div><div class="ttdoc">Atomically release *mu and wait on *cv.</div></div>
  263. <div class="ttc" id="asupport_2sync_8h_html_a8c1e214b5ff9e8f25dfc785977d8a092"><div class="ttname"><a href="support_2sync_8h.html#a8c1e214b5ff9e8f25dfc785977d8a092">gpr_event_init</a></div><div class="ttdeci">GPRAPI void gpr_event_init(gpr_event *ev)</div><div class="ttdoc">— One-time event notification —</div></div>
  264. <div class="ttc" id="astructgpr__refcount_html"><div class="ttname"><a href="structgpr__refcount.html">gpr_refcount</a></div><div class="ttdef"><b>Definition:</b> sync_generic.h:36</div></div>
  265. <div class="ttc" id="astructgpr__stats__counter_html"><div class="ttname"><a href="structgpr__stats__counter.html">gpr_stats_counter</a></div><div class="ttdef"><b>Definition:</b> sync_generic.h:41</div></div>
  266. <div class="ttc" id="atime_8h_html_a57c9693ef253d0951363c5dafb6586df"><div class="ttname"><a href="time_8h.html#a57c9693ef253d0951363c5dafb6586df">gpr_inf_future</a></div><div class="ttdeci">GPRAPI gpr_timespec gpr_inf_future(gpr_clock_type type)</div><div class="ttdoc">The zero time interval.</div></div>
  267. <div class="ttc" id="asupport_2sync_8h_html_afb46be51462503426660193b7d49f599"><div class="ttname"><a href="support_2sync_8h.html#afb46be51462503426660193b7d49f599">gpr_ref_init</a></div><div class="ttdeci">GPRAPI void gpr_ref_init(gpr_refcount *r, int n)</div><div class="ttdoc">— Reference counting —</div></div>
  268. <div class="ttc" id="asupport_2sync_8h_html_a112715bd2e69d92010a6317c839eb36f"><div class="ttname"><a href="support_2sync_8h.html#a112715bd2e69d92010a6317c839eb36f">gpr_cv_init</a></div><div class="ttdeci">GPRAPI void gpr_cv_init(gpr_cv *cv)</div><div class="ttdoc">— Condition variable interface —</div></div>
  269. <div class="ttc" id="asupport_2sync_8h_html_a053788a2217043c527afc8b424568b22"><div class="ttname"><a href="support_2sync_8h.html#a053788a2217043c527afc8b424568b22">gpr_cv_destroy</a></div><div class="ttdeci">GPRAPI void gpr_cv_destroy(gpr_cv *cv)</div><div class="ttdoc">Cause *cv no longer to be initialized, freeing any memory in use.</div></div>
  270. <div class="ttc" id="asupport_2sync_8h_html_a39a77b09ffc2c288b097c84c4e0e29a5"><div class="ttname"><a href="support_2sync_8h.html#a39a77b09ffc2c288b097c84c4e0e29a5">gpr_event_set</a></div><div class="ttdeci">GPRAPI void gpr_event_set(gpr_event *ev, void *value)</div><div class="ttdoc">Set *ev so that gpr_event_get() and gpr_event_wait() will return value.</div></div>
  271. <div class="ttc" id="asupport_2sync_8h_html_a8d1f3e75040086f0da4d7fc4e94a5b2b"><div class="ttname"><a href="support_2sync_8h.html#a8d1f3e75040086f0da4d7fc4e94a5b2b">gpr_stats_inc</a></div><div class="ttdeci">GPRAPI void gpr_stats_inc(gpr_stats_counter *c, intptr_t inc)</div><div class="ttdoc">*c += inc.</div></div>
  272. <div class="ttc" id="asupport_2sync_8h_html_abf066e257012246303a938350d1546a0"><div class="ttname"><a href="support_2sync_8h.html#abf066e257012246303a938350d1546a0">gpr_cv_signal</a></div><div class="ttdeci">GPRAPI void gpr_cv_signal(gpr_cv *cv)</div><div class="ttdoc">If any threads are waiting on *cv, wake at least one.</div></div>
  273. <div class="ttc" id="aimpl_2codegen_2sync_8h_html"><div class="ttname"><a href="impl_2codegen_2sync_8h.html">sync.h</a></div></div>
  274. <div class="ttc" id="asupport_2sync_8h_html_a7001a8164ce893911acf26d2fb8fd2ba"><div class="ttname"><a href="support_2sync_8h.html#a7001a8164ce893911acf26d2fb8fd2ba">gpr_mu_lock</a></div><div class="ttdeci">GPRAPI void gpr_mu_lock(gpr_mu *mu)</div><div class="ttdoc">Wait until no thread has a lock on *mu, cause the calling thread to own an exclusive lock on *mu,...</div></div>
  275. <div class="ttc" id="asupport_2sync_8h_html_a684cb215f9f840791372180a810b405d"><div class="ttname"><a href="support_2sync_8h.html#a684cb215f9f840791372180a810b405d">gpr_cv_broadcast</a></div><div class="ttdeci">GPRAPI void gpr_cv_broadcast(gpr_cv *cv)</div><div class="ttdoc">Wake all threads waiting on *cv.</div></div>
  276. <div class="ttc" id="asupport_2sync_8h_html_a18765dc6c6292b12388a68eb541419a8"><div class="ttname"><a href="support_2sync_8h.html#a18765dc6c6292b12388a68eb541419a8">gpr_mu_trylock</a></div><div class="ttdeci">GPRAPI int gpr_mu_trylock(gpr_mu *mu)</div><div class="ttdoc">Without blocking, attempt to acquire an exclusive lock on *mu for the calling thread,...</div></div>
  277. <div class="ttc" id="agpr__types_8h_html"><div class="ttname"><a href="gpr__types_8h.html">gpr_types.h</a></div></div>
  278. <div class="ttc" id="astructgpr__event_html"><div class="ttname"><a href="structgpr__event.html">gpr_event</a></div><div class="ttdef"><b>Definition:</b> sync_generic.h:28</div></div>
  279. <div class="ttc" id="aimpl_2codegen_2sync__posix_8h_html_aa66fb6a11304ef6759d76f84a34ee28f"><div class="ttname"><a href="impl_2codegen_2sync__posix_8h.html#aa66fb6a11304ef6759d76f84a34ee28f">gpr_mu</a></div><div class="ttdeci">pthread_mutex_t gpr_mu</div><div class="ttdef"><b>Definition:</b> sync_posix.h:45</div></div>
  280. <div class="ttc" id="asupport_2sync_8h_html_af0e6cc39401a0ee35b728f5b88135376"><div class="ttname"><a href="support_2sync_8h.html#af0e6cc39401a0ee35b728f5b88135376">gpr_mu_unlock</a></div><div class="ttdeci">GPRAPI void gpr_mu_unlock(gpr_mu *mu)</div><div class="ttdoc">Release an exclusive lock on *mu held by the calling thread.</div></div>
  281. <div class="ttc" id="asupport_2sync_8h_html_acc62f586f166d0cbd2c3ba7a707ac5a3"><div class="ttname"><a href="support_2sync_8h.html#acc62f586f166d0cbd2c3ba7a707ac5a3">gpr_event_wait</a></div><div class="ttdeci">GPRAPI void * gpr_event_wait(gpr_event *ev, gpr_timespec abs_deadline)</div><div class="ttdoc">Wait until *ev is set by gpr_event_set(ev, ...), or abs_deadline is exceeded, then return gpr_event_g...</div></div>
  282. <div class="ttc" id="asupport_2sync_8h_html_a532b23d0393bf91ebcc221f5855c17fa"><div class="ttname"><a href="support_2sync_8h.html#a532b23d0393bf91ebcc221f5855c17fa">gpr_ref_is_unique</a></div><div class="ttdeci">GPRAPI int gpr_ref_is_unique(gpr_refcount *r)</div><div class="ttdoc">Return non-zero iff the reference count of *r is one, and thus is owned by exactly one object.</div></div>
  283. <div class="ttc" id="asupport_2sync_8h_html_a05c0002cb69dbce4d94819f65551fca2"><div class="ttname"><a href="support_2sync_8h.html#a05c0002cb69dbce4d94819f65551fca2">gpr_stats_init</a></div><div class="ttdeci">GPRAPI void gpr_stats_init(gpr_stats_counter *c, intptr_t n)</div><div class="ttdoc">— Stats counters —</div></div>
  284. <div class="ttc" id="asupport_2sync_8h_html_a244626eb1a00a846eb602820fc736f84"><div class="ttname"><a href="support_2sync_8h.html#a244626eb1a00a846eb602820fc736f84">gpr_unref</a></div><div class="ttdeci">GPRAPI int gpr_unref(gpr_refcount *r)</div><div class="ttdoc">Decrement the reference count *r and return non-zero iff it has reached zero.</div></div>
  285. <div class="ttc" id="asupport_2sync_8h_html_a91472a0360a87654379b3b6eb0fe942e"><div class="ttname"><a href="support_2sync_8h.html#a91472a0360a87654379b3b6eb0fe942e">gpr_refn</a></div><div class="ttdeci">GPRAPI void gpr_refn(gpr_refcount *r, int n)</div><div class="ttdoc">Increment the reference count *r by n.</div></div>
  286. <div class="ttc" id="asupport_2sync_8h_html_a989fb0f141d90a05b20425ebdc77936d"><div class="ttname"><a href="support_2sync_8h.html#a989fb0f141d90a05b20425ebdc77936d">gpr_mu_init</a></div><div class="ttdeci">GPRAPI void gpr_mu_init(gpr_mu *mu)</div><div class="ttdoc">— Mutex interface —</div></div>
  287. <div class="ttc" id="astructgpr__timespec_html"><div class="ttname"><a href="structgpr__timespec.html">gpr_timespec</a></div><div class="ttdoc">Analogous to struct timespec.</div><div class="ttdef"><b>Definition:</b> gpr_types.h:47</div></div>
  288. <div class="ttc" id="asupport_2sync_8h_html_afb62d3857409962718465c407f97fec3"><div class="ttname"><a href="support_2sync_8h.html#afb62d3857409962718465c407f97fec3">gpr_event_get</a></div><div class="ttdeci">GPRAPI void * gpr_event_get(gpr_event *ev)</div><div class="ttdoc">Return the value set by gpr_event_set(ev, ...), or NULL if no such call has completed.</div></div>
  289. <div class="ttc" id="asupport_2sync_8h_html_ad152a5820acaa9ca6163bcbe45d078d6"><div class="ttname"><a href="support_2sync_8h.html#ad152a5820acaa9ca6163bcbe45d078d6">gpr_ref_non_zero</a></div><div class="ttdeci">GPRAPI void gpr_ref_non_zero(gpr_refcount *r)</div><div class="ttdoc">Increment the reference count *r.</div></div>
  290. <div class="ttc" id="asupport_2port__platform_8h_html"><div class="ttname"><a href="support_2port__platform_8h.html">port_platform.h</a></div></div>
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