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  70. <div class="title">channel_interface.h</div>  </div>
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  73. <a href="grpcpp_2impl_2codegen_2channel__interface_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>
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  74. <div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> *</span></div>
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  75. <div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * Copyright 2016 gRPC authors.</span></div>
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  77. <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>
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  81. <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>
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    90. 

  90. <div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160; </div>
    91. 

  91. <div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor">#ifndef GRPCPP_IMPL_CODEGEN_CHANNEL_INTERFACE_H</span></div>
    92. 

  92. <div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="preprocessor">#define GRPCPP_IMPL_CODEGEN_CHANNEL_INTERFACE_H</span></div>
    93. 

  93. <div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160; </div>
    94. 

  94. <div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="connectivity__state_8h.html">grpc/impl/codegen/connectivity_state.h</a>&gt;</span></div>
    95. 

  95. <div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="grpcpp_2impl_2codegen_2call_8h.html">grpcpp/impl/codegen/call.h</a>&gt;</span></div>
    96. 

  96. <div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="grpcpp_2impl_2codegen_2status_8h.html">grpcpp/impl/codegen/status.h</a>&gt;</span></div>
    97. 

  97. <div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="grpcpp_2impl_2codegen_2time_8h.html">grpcpp/impl/codegen/time.h</a>&gt;</span></div>
    98. 

  98. <div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160; </div>
    99. 

  99. <div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacegrpc.html">grpc</a> {</div>
    100. 

  100. <div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> R&gt;</div>
    101. 

  101. <div class="line"><a name="l00029"></a><span class="lineno"><a class="line" href="classgrpc_1_1_client_reader.html">   29</a></span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1_client_reader.html">ClientReader</a>;</div>
    102. 

  102. <div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> W&gt;</div>
    103. 

  103. <div class="line"><a name="l00031"></a><span class="lineno"><a class="line" href="classgrpc_1_1_client_writer.html">   31</a></span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1_client_writer.html">ClientWriter</a>;</div>
    104. 

  104. <div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> W, <span class="keyword">class</span> R&gt;</div>
    105. 

  105. <div class="line"><a name="l00033"></a><span class="lineno"><a class="line" href="classgrpc_1_1_client_reader_writer.html">   33</a></span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1_client_reader_writer.html">ClientReaderWriter</a>;</div>
    106. 

  106. <div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="keyword">namespace </span>internal {</div>
    107. 

  107. <div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> InputMessage, <span class="keyword">class</span> OutputMessage&gt;</div>
    108. 

  108. <div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="classgrpc_1_1internal_1_1_callback_unary_call_impl.html">   36</a></span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1internal_1_1_callback_unary_call_impl.html">CallbackUnaryCallImpl</a>;</div>
    109. 

  109. <div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> R&gt;</div>
    110. 

  110. <div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1internal_1_1_client_async_reader_factory.html">ClientAsyncReaderFactory</a>;</div>
    111. 

  111. <div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> W&gt;</div>
    112. 

  112. <div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1internal_1_1_client_async_writer_factory.html">ClientAsyncWriterFactory</a>;</div>
    113. 

  113. <div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> W, <span class="keyword">class</span> R&gt;</div>
    114. 

  114. <div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1internal_1_1_client_async_reader_writer_factory.html">ClientAsyncReaderWriterFactory</a>;</div>
    115. 

  115. <div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1internal_1_1_client_async_response_reader_helper.html">ClientAsyncResponseReaderHelper</a>;</div>
    116. 

  116. <div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> W, <span class="keyword">class</span> R&gt;</div>
    117. 

  117. <div class="line"><a name="l00045"></a><span class="lineno"><a class="line" href="classgrpc_1_1internal_1_1_client_callback_reader_writer_factory.html">   45</a></span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1internal_1_1_client_callback_reader_writer_factory.html">ClientCallbackReaderWriterFactory</a>;</div>
    118. 

  118. <div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> R&gt;</div>
    119. 

  119. <div class="line"><a name="l00047"></a><span class="lineno"><a class="line" href="classgrpc_1_1internal_1_1_client_callback_reader_factory.html">   47</a></span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1internal_1_1_client_callback_reader_factory.html">ClientCallbackReaderFactory</a>;</div>
    120. 

  120. <div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> W&gt;</div>
    121. 

  121. <div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="classgrpc_1_1internal_1_1_client_callback_writer_factory.html">   49</a></span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1internal_1_1_client_callback_writer_factory.html">ClientCallbackWriterFactory</a>;</div>
    122. 

  122. <div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1internal_1_1_client_callback_unary_factory.html">ClientCallbackUnaryFactory</a>;</div>
    123. 

  123. <div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;}  <span class="comment">// namespace internal</span></div>
    124. 

  124. <div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160; </div>
    125. 

  125. <div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1_channel_interface.html">ChannelInterface</a>;</div>
    126. 

  126. <div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1_client_context.html">ClientContext</a>;</div>
    127. 

  127. <div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1_completion_queue.html">CompletionQueue</a>;</div>
    128. 

  128. <div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160; </div>
    129. 

  129. <div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;<span class="keyword">namespace </span>experimental {</div>
    130. 

  130. <div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;<span class="keyword">class </span>DelegatingChannel;</div>
    131. 

  131. <div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;}</div>
    132. 

  132. <div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160; </div>
    133. 

  133. <div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;<span class="keyword">namespace </span>internal {</div>
    134. 

  134. <div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;<span class="keyword">class </span>Call;</div>
    135. 

  135. <div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;<span class="keyword">class </span>CallOpSetInterface;</div>
    136. 

  136. <div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;<span class="keyword">class </span>RpcMethod;</div>
    137. 

  137. <div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;<span class="keyword">class </span>InterceptedChannel;</div>
    138. 

  138. <div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> InputMessage, <span class="keyword">class</span> OutputMessage&gt;</div>
    139. 

  139. <div class="line"><a name="l00067"></a><span class="lineno"><a class="line" href="classgrpc_1_1internal_1_1_blocking_unary_call_impl.html">   67</a></span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1internal_1_1_blocking_unary_call_impl.html">BlockingUnaryCallImpl</a>;</div>
    140. 

  140. <div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;}  <span class="comment">// namespace internal</span></div>
    141. 

  141. <div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160; </div>
    142. 

  142. <div class="line"><a name="l00071"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html">   71</a></span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1_channel_interface.html">ChannelInterface</a> {</div>
    143. 

  143. <div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160; <span class="keyword">public</span>:</div>
    144. 

  144. <div class="line"><a name="l00073"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#a3f5145d4778aa952540dc9983cefe13f">   73</a></span>&#160;  <span class="keyword">virtual</span> <a class="code" href="classgrpc_1_1_channel_interface.html#a3f5145d4778aa952540dc9983cefe13f">~ChannelInterface</a>() {}</div>
    145. 

  145. <div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;  <span class="keyword">virtual</span> <a class="code" href="connectivity__state_8h.html#a065b65f5cdd062a67d82e2b6bcf68cf2">grpc_connectivity_state</a> <a class="code" href="classgrpc_1_1_channel_interface.html#a68e987e7b87ca5a2668419736f9ee9b1">GetState</a>(<span class="keywordtype">bool</span> try_to_connect) = 0;</div>
    146. 

  146. <div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160; </div>
    147. 

  147. <div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;  <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
    148. 

  148. <div class="line"><a name="l00081"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#ad2ffa0dffc84f1fe38084c0993c4ca50">   81</a></span>&#160;  <span class="keywordtype">void</span> <a class="code" href="classgrpc_1_1_channel_interface.html#ad2ffa0dffc84f1fe38084c0993c4ca50">NotifyOnStateChange</a>(<a class="code" href="connectivity__state_8h.html#a065b65f5cdd062a67d82e2b6bcf68cf2">grpc_connectivity_state</a> last_observed, T deadline,</div>
    149. 

  149. <div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;                           ::<a class="code" href="classgrpc_1_1_completion_queue.html">grpc::CompletionQueue</a>* cq, <span class="keywordtype">void</span>* tag) {</div>
    150. 

  150. <div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;    <a class="code" href="classgrpc_1_1_time_point.html">TimePoint&lt;T&gt;</a> deadline_tp(deadline);</div>
    151. 

  151. <div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;    NotifyOnStateChangeImpl(last_observed, deadline_tp.<a class="code" href="classgrpc_1_1_time_point.html#aefaca2a1ef33585bed428bc21810221a">raw_time</a>(), cq, tag);</div>
    152. 

  152. <div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;  }</div>
    153. 

  153. <div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160; </div>
    154. 

  154. <div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;  <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
    155. 

  155. <div class="line"><a name="l00090"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#a70567e7ea3d1a967ecf5ecdc220ac27e">   90</a></span>&#160;  <span class="keywordtype">bool</span> <a class="code" href="classgrpc_1_1_channel_interface.html#a70567e7ea3d1a967ecf5ecdc220ac27e">WaitForStateChange</a>(<a class="code" href="connectivity__state_8h.html#a065b65f5cdd062a67d82e2b6bcf68cf2">grpc_connectivity_state</a> last_observed, T deadline) {</div>
    156. 

  156. <div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;    <a class="code" href="classgrpc_1_1_time_point.html">TimePoint&lt;T&gt;</a> deadline_tp(deadline);</div>
    157. 

  157. <div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;    <span class="keywordflow">return</span> WaitForStateChangeImpl(last_observed, deadline_tp.<a class="code" href="classgrpc_1_1_time_point.html#aefaca2a1ef33585bed428bc21810221a">raw_time</a>());</div>
    158. 

  158. <div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;  }</div>
    159. 

  159. <div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160; </div>
    160. 

  160. <div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;  <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
    161. 

  161. <div class="line"><a name="l00097"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#a31d360cd218614814d68e01e07ce55cc">   97</a></span>&#160;  <span class="keywordtype">bool</span> <a class="code" href="classgrpc_1_1_channel_interface.html#a31d360cd218614814d68e01e07ce55cc">WaitForConnected</a>(T deadline) {</div>
    162. 

  162. <div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;    <a class="code" href="connectivity__state_8h.html#a065b65f5cdd062a67d82e2b6bcf68cf2">grpc_connectivity_state</a> state;</div>
    163. 

  163. <div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;    <span class="keywordflow">while</span> ((state = <a class="code" href="classgrpc_1_1_channel_interface.html#a68e987e7b87ca5a2668419736f9ee9b1">GetState</a>(<span class="keyword">true</span>)) != <a class="code" href="connectivity__state_8h.html#a065b65f5cdd062a67d82e2b6bcf68cf2aab01ef3f78d9236dfa3c751dc66aa7ea">GRPC_CHANNEL_READY</a>) {</div>
    164. 

  164. <div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;      <span class="keywordflow">if</span> (!<a class="code" href="classgrpc_1_1_channel_interface.html#a70567e7ea3d1a967ecf5ecdc220ac27e">WaitForStateChange</a>(state, deadline)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
    165. 

  165. <div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;    }</div>
    166. 

  166. <div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
    167. 

  167. <div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;  }</div>
    168. 

  168. <div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160; </div>
    169. 

  169. <div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160; <span class="keyword">private</span>:</div>
    170. 

  170. <div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;  <span class="keyword">template</span> &lt;<span class="keyword">class</span> R&gt;</div>
    171. 

  171. <div class="line"><a name="l00107"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#ade499098cc91745c1c87147d7a7fb7bf">  107</a></span>&#160;  <span class="keyword">friend</span> class ::grpc::ClientReader;</div>
    172. 

  172. <div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;  <span class="keyword">template</span> &lt;<span class="keyword">class</span> W&gt;</div>
    173. 

  173. <div class="line"><a name="l00109"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#a4498fada67d531d99a8642f47d746544">  109</a></span>&#160;  <span class="keyword">friend</span> class ::grpc::ClientWriter;</div>
    174. 

  174. <div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;  <span class="keyword">template</span> &lt;<span class="keyword">class</span> W, <span class="keyword">class</span> R&gt;</div>
    175. 

  175. <div class="line"><a name="l00111"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#a6d5659aa24edba057895be774e2752ec">  111</a></span>&#160;  <span class="keyword">friend</span> class ::grpc::ClientReaderWriter;</div>
    176. 

  176. <div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;  <span class="keyword">template</span> &lt;<span class="keyword">class</span> R&gt;</div>
    177. 

  177. <div class="line"><a name="l00113"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#a2175726e9cbee09a493f40e1c3b5b088">  113</a></span>&#160;  <span class="keyword">friend</span> class ::grpc::internal::ClientAsyncReaderFactory;</div>
    178. 

  178. <div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;  <span class="keyword">template</span> &lt;<span class="keyword">class</span> W&gt;</div>
    179. 

  179. <div class="line"><a name="l00115"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#aa160cb54356482ee5c40511fe76b4c9d">  115</a></span>&#160;  <span class="keyword">friend</span> class ::grpc::internal::ClientAsyncWriterFactory;</div>
    180. 

  180. <div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;  <span class="keyword">template</span> &lt;<span class="keyword">class</span> W, <span class="keyword">class</span> R&gt;</div>
    181. 

  181. <div class="line"><a name="l00117"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#a7c87e7adb535c485a4bc8e7215fab4a4">  117</a></span>&#160;  <span class="keyword">friend</span> class ::grpc::internal::ClientAsyncReaderWriterFactory;</div>
    182. 

  182. <div class="line"><a name="l00118"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#a1276dd3b0504721eced67f15c36ac888">  118</a></span>&#160;  <span class="keyword">friend</span> class ::grpc::internal::ClientAsyncResponseReaderHelper;</div>
    183. 

  183. <div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;  <span class="keyword">template</span> &lt;<span class="keyword">class</span> W, <span class="keyword">class</span> R&gt;</div>
    184. 

  184. <div class="line"><a name="l00120"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#a12a368febde8b86808b24295c04c7b34">  120</a></span>&#160;  <span class="keyword">friend</span> class ::grpc::internal::ClientCallbackReaderWriterFactory;</div>
    185. 

  185. <div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;  <span class="keyword">template</span> &lt;<span class="keyword">class</span> R&gt;</div>
    186. 

  186. <div class="line"><a name="l00122"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#aac76a68caa02d284d9352eb3b8ed04fe">  122</a></span>&#160;  <span class="keyword">friend</span> class ::grpc::internal::ClientCallbackReaderFactory;</div>
    187. 

  187. <div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;  <span class="keyword">template</span> &lt;<span class="keyword">class</span> W&gt;</div>
    188. 

  188. <div class="line"><a name="l00124"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#abe439612681a46aabf8cb5c1c8f0a170">  124</a></span>&#160;  <span class="keyword">friend</span> class ::grpc::internal::ClientCallbackWriterFactory;</div>
    189. 

  189. <div class="line"><a name="l00125"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#aee23b219653dea5f3fef55176aca3509">  125</a></span>&#160;  <span class="keyword">friend</span> class ::grpc::internal::ClientCallbackUnaryFactory;</div>
    190. 

  190. <div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;  <span class="keyword">template</span> &lt;<span class="keyword">class</span> InputMessage, <span class="keyword">class</span> OutputMessage&gt;</div>
    191. 

  191. <div class="line"><a name="l00127"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#ad26a823fee699f97244d581f400fe39a">  127</a></span>&#160;  <span class="keyword">friend</span> class ::grpc::internal::BlockingUnaryCallImpl;</div>
    192. 

  192. <div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;  <span class="keyword">template</span> &lt;<span class="keyword">class</span> InputMessage, <span class="keyword">class</span> OutputMessage&gt;</div>
    193. 

  193. <div class="line"><a name="l00129"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#a039f3a4023eccbecbb5c9925722e9ef7">  129</a></span>&#160;  <span class="keyword">friend</span> class ::grpc::internal::CallbackUnaryCallImpl;</div>
    194. 

  194. <div class="line"><a name="l00130"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#afdfab4a69fd00ee5bffe02b9fd2718a2">  130</a></span>&#160;  <span class="keyword">friend</span> class ::grpc::internal::RpcMethod;</div>
    195. 

  195. <div class="line"><a name="l00131"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#ac8c9786b36d074059b306ff1d1d90453">  131</a></span>&#160;  <span class="keyword">friend</span> class ::grpc::experimental::DelegatingChannel;</div>
    196. 

  196. <div class="line"><a name="l00132"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel_interface.html#a9a23a8cfcee9fd9658ecd8bb1a3193ac">  132</a></span>&#160;  <span class="keyword">friend</span> class ::grpc::internal::InterceptedChannel;</div>
    197. 

  197. <div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;  <span class="keyword">virtual</span> <a class="code" href="classgrpc_1_1internal_1_1_call.html">internal::Call</a> CreateCall(<span class="keyword">const</span> <a class="code" href="classgrpc_1_1internal_1_1_rpc_method.html">internal::RpcMethod</a>&amp; method,</div>
    198. 

  198. <div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;                                    ::<a class="code" href="classgrpc_1_1_client_context.html">grpc::ClientContext</a>* context,</div>
    199. 

  199. <div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;                                    ::<a class="code" href="classgrpc_1_1_completion_queue.html">grpc::CompletionQueue</a>* cq) = 0;</div>
    200. 

  200. <div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;  <span class="keyword">virtual</span> <span class="keywordtype">void</span> PerformOpsOnCall(<a class="code" href="classgrpc_1_1internal_1_1_call_op_set_interface.html">internal::CallOpSetInterface</a>* ops,</div>
    201. 

  201. <div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;                                <a class="code" href="classgrpc_1_1internal_1_1_call.html">internal::Call</a>* call) = 0;</div>
    202. 

  202. <div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;  <span class="keyword">virtual</span> <span class="keywordtype">void</span>* RegisterMethod(<span class="keyword">const</span> <span class="keywordtype">char</span>* method) = 0;</div>
    203. 

  203. <div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;  <span class="keyword">virtual</span> <span class="keywordtype">void</span> NotifyOnStateChangeImpl(<a class="code" href="connectivity__state_8h.html#a065b65f5cdd062a67d82e2b6bcf68cf2">grpc_connectivity_state</a> last_observed,</div>
    204. 

  204. <div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;                                       <a class="code" href="structgpr__timespec.html">gpr_timespec</a> deadline,</div>
    205. 

  205. <div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;                                       ::<a class="code" href="classgrpc_1_1_completion_queue.html">grpc::CompletionQueue</a>* cq,</div>
    206. 

  206. <div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;                                       <span class="keywordtype">void</span>* tag) = 0;</div>
    207. 

  207. <div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;  <span class="keyword">virtual</span> <span class="keywordtype">bool</span> WaitForStateChangeImpl(<a class="code" href="connectivity__state_8h.html#a065b65f5cdd062a67d82e2b6bcf68cf2">grpc_connectivity_state</a> last_observed,</div>
    208. 

  208. <div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;                                      <a class="code" href="structgpr__timespec.html">gpr_timespec</a> deadline) = 0;</div>
    209. 

  209. <div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160; </div>
    210. 

  210. <div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;  <span class="comment">// EXPERIMENTAL</span></div>
    211. 

  211. <div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;  <span class="comment">// This is needed to keep codegen_test_minimal happy. InterceptedChannel needs</span></div>
    212. 

  212. <div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;  <span class="comment">// to make use of this but can&#39;t directly call Channel&#39;s implementation</span></div>
    213. 

  213. <div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;  <span class="comment">// because of the test.</span></div>
    214. 

  214. <div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;  <span class="comment">// Returns an empty Call object (rather than being pure) since this is a new</span></div>
    215. 

  215. <div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;  <span class="comment">// method and adding a new pure method to an interface would be a breaking</span></div>
    216. 

  216. <div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;  <span class="comment">// change (even though this is private and non-API)</span></div>
    217. 

  217. <div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;  <span class="keyword">virtual</span> <a class="code" href="classgrpc_1_1internal_1_1_call.html">internal::Call</a> CreateCallInternal(</div>
    218. 

  218. <div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;      <span class="keyword">const</span> <a class="code" href="classgrpc_1_1internal_1_1_rpc_method.html">internal::RpcMethod</a>&amp; <span class="comment">/*method*/</span>, ::<a class="code" href="classgrpc_1_1_client_context.html">grpc::ClientContext</a>* <span class="comment">/*context*/</span>,</div>
    219. 

  219. <div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;      ::<a class="code" href="classgrpc_1_1_completion_queue.html">grpc::CompletionQueue</a>* <span class="comment">/*cq*/</span>, <span class="keywordtype">size_t</span> <span class="comment">/*interceptor_pos*/</span>) {</div>
    220. 

  220. <div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;    <span class="keywordflow">return</span> <a class="code" href="classgrpc_1_1internal_1_1_call.html">internal::Call</a>();</div>
    221. 

  221. <div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;  }</div>
    222. 

  222. <div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160; </div>
    223. 

  223. <div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;  <span class="comment">// EXPERIMENTAL</span></div>
    224. 

  224. <div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;  <span class="comment">// A method to get the callbackable completion queue associated with this</span></div>
    225. 

  225. <div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;  <span class="comment">// channel. If the return value is nullptr, this channel doesn&#39;t support</span></div>
    226. 

  226. <div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;  <span class="comment">// callback operations.</span></div>
    227. 

  227. <div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;  <span class="comment">// TODO(vjpai): Consider a better default like using a global CQ</span></div>
    228. 

  228. <div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;  <span class="comment">// Returns nullptr (rather than being pure) since this is a post-1.0 method</span></div>
    229. 

  229. <div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;  <span class="comment">// and adding a new pure method to an interface would be a breaking change</span></div>
    230. 

  230. <div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;  <span class="comment">// (even though this is private and non-API)</span></div>
    231. 

  231. <div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;  virtual ::grpc::CompletionQueue* CallbackCQ() { <span class="keywordflow">return</span> <span class="keyword">nullptr</span>; }</div>
    232. 

  232. <div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;};</div>
    233. 

  233. <div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;}  <span class="comment">// namespace grpc</span></div>
    234. 

  234. <div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160; </div>
    235. 

  235. <div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;<span class="preprocessor">#endif  // GRPCPP_IMPL_CODEGEN_CHANNEL_INTERFACE_H</span></div>
    236. 

  236. </div><!-- fragment --></div><!-- contents -->
    237. 

  237. <div class="ttc" id="aclassgrpc_1_1_client_writer_html"><div class="ttname"><a href="classgrpc_1_1_client_writer.html">grpc::ClientWriter</a></div><div class="ttdoc">Synchronous (blocking) client-side API for doing client-streaming RPCs, where the outgoing message st...</div><div class="ttdef"><b>Definition:</b> channel_interface.h:31</div></div>
    238. 

  238. <div class="ttc" id="agrpcpp_2impl_2codegen_2time_8h_html"><div class="ttname"><a href="grpcpp_2impl_2codegen_2time_8h.html">time.h</a></div></div>
    239. 

  239. <div class="ttc" id="anamespacegrpc_html"><div class="ttname"><a href="namespacegrpc.html">grpc</a></div><div class="ttdoc">An Alarm posts the user-provided tag to its associated completion queue or invokes the user-provided ...</div><div class="ttdef"><b>Definition:</b> alarm.h:33</div></div>
    240. 

  240. <div class="ttc" id="agrpcpp_2impl_2codegen_2status_8h_html"><div class="ttname"><a href="grpcpp_2impl_2codegen_2status_8h.html">status.h</a></div></div>
    241. 

  241. <div class="ttc" id="aclassgrpc_1_1internal_1_1_client_async_reader_writer_factory_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_client_async_reader_writer_factory.html">grpc::internal::ClientAsyncReaderWriterFactory</a></div><div class="ttdef"><b>Definition:</b> async_stream.h:484</div></div>
    242. 

  242. <div class="ttc" id="aclassgrpc_1_1internal_1_1_blocking_unary_call_impl_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_blocking_unary_call_impl.html">grpc::internal::BlockingUnaryCallImpl</a></div><div class="ttdef"><b>Definition:</b> channel_interface.h:67</div></div>
    243. 

  243. <div class="ttc" id="aclassgrpc_1_1internal_1_1_call_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_call.html">grpc::internal::Call</a></div><div class="ttdoc">Straightforward wrapping of the C call object.</div><div class="ttdef"><b>Definition:</b> call.h:35</div></div>
    244. 

  244. <div class="ttc" id="aclassgrpc_1_1_channel_interface_html_a70567e7ea3d1a967ecf5ecdc220ac27e"><div class="ttname"><a href="classgrpc_1_1_channel_interface.html#a70567e7ea3d1a967ecf5ecdc220ac27e">grpc::ChannelInterface::WaitForStateChange</a></div><div class="ttdeci">bool WaitForStateChange(grpc_connectivity_state last_observed, T deadline)</div><div class="ttdoc">Blocking wait for channel state change or deadline expiration.</div><div class="ttdef"><b>Definition:</b> channel_interface.h:90</div></div>
    245. 

  245. <div class="ttc" id="aclassgrpc_1_1internal_1_1_client_async_reader_factory_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_client_async_reader_factory.html">grpc::internal::ClientAsyncReaderFactory</a></div><div class="ttdef"><b>Definition:</b> async_stream.h:170</div></div>
    246. 

  246. <div class="ttc" id="aclassgrpc_1_1_client_reader_html"><div class="ttname"><a href="classgrpc_1_1_client_reader.html">grpc::ClientReader</a></div><div class="ttdoc">Synchronous (blocking) client-side API for doing server-streaming RPCs, where the stream of messages ...</div><div class="ttdef"><b>Definition:</b> channel_interface.h:29</div></div>
    247. 

  247. <div class="ttc" id="aclassgrpc_1_1internal_1_1_client_callback_writer_factory_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_client_callback_writer_factory.html">grpc::internal::ClientCallbackWriterFactory</a></div><div class="ttdef"><b>Definition:</b> channel_interface.h:49</div></div>
    248. 

  248. <div class="ttc" id="aclassgrpc_1_1_client_context_html"><div class="ttname"><a href="classgrpc_1_1_client_context.html">grpc::ClientContext</a></div><div class="ttdoc">A ClientContext allows the person implementing a service client to:</div><div class="ttdef"><b>Definition:</b> client_context.h:192</div></div>
    249. 

  249. <div class="ttc" id="aconnectivity__state_8h_html_a065b65f5cdd062a67d82e2b6bcf68cf2"><div class="ttname"><a href="connectivity__state_8h.html#a065b65f5cdd062a67d82e2b6bcf68cf2">grpc_connectivity_state</a></div><div class="ttdeci">grpc_connectivity_state</div><div class="ttdoc">Connectivity state of a channel.</div><div class="ttdef"><b>Definition:</b> connectivity_state.h:27</div></div>
    250. 

  250. <div class="ttc" id="aclassgrpc_1_1internal_1_1_client_callback_reader_writer_factory_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_client_callback_reader_writer_factory.html">grpc::internal::ClientCallbackReaderWriterFactory</a></div><div class="ttdef"><b>Definition:</b> channel_interface.h:45</div></div>
    251. 

  251. <div class="ttc" id="aclassgrpc_1_1internal_1_1_call_op_set_interface_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_call_op_set_interface.html">grpc::internal::CallOpSetInterface</a></div><div class="ttdoc">An abstract collection of call ops, used to generate the grpc_call_op structure to pass down to the l...</div><div class="ttdef"><b>Definition:</b> call_op_set_interface.h:34</div></div>
    252. 

  252. <div class="ttc" id="aclassgrpc_1_1internal_1_1_callback_unary_call_impl_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_callback_unary_call_impl.html">grpc::internal::CallbackUnaryCallImpl</a></div><div class="ttdef"><b>Definition:</b> channel_interface.h:36</div></div>
    253. 

  253. <div class="ttc" id="aconnectivity__state_8h_html"><div class="ttname"><a href="connectivity__state_8h.html">connectivity_state.h</a></div></div>
    254. 

  254. <div class="ttc" id="aclassgrpc_1_1_channel_interface_html_a31d360cd218614814d68e01e07ce55cc"><div class="ttname"><a href="classgrpc_1_1_channel_interface.html#a31d360cd218614814d68e01e07ce55cc">grpc::ChannelInterface::WaitForConnected</a></div><div class="ttdeci">bool WaitForConnected(T deadline)</div><div class="ttdoc">Wait for this channel to be connected.</div><div class="ttdef"><b>Definition:</b> channel_interface.h:97</div></div>
    255. 

  255. <div class="ttc" id="aclassgrpc_1_1_time_point_html_aefaca2a1ef33585bed428bc21810221a"><div class="ttname"><a href="classgrpc_1_1_time_point.html#aefaca2a1ef33585bed428bc21810221a">grpc::TimePoint::raw_time</a></div><div class="ttdeci">gpr_timespec raw_time()=delete</div></div>
    256. 

  256. <div class="ttc" id="aclassgrpc_1_1_channel_interface_html"><div class="ttname"><a href="classgrpc_1_1_channel_interface.html">grpc::ChannelInterface</a></div><div class="ttdoc">Codegen interface for grpc::Channel.</div><div class="ttdef"><b>Definition:</b> channel_interface.h:71</div></div>
    257. 

  257. <div class="ttc" id="aclassgrpc_1_1internal_1_1_client_async_response_reader_helper_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_client_async_response_reader_helper.html">grpc::internal::ClientAsyncResponseReaderHelper</a></div><div class="ttdef"><b>Definition:</b> async_unary_call.h:76</div></div>
    258. 

  258. <div class="ttc" id="aclassgrpc_1_1internal_1_1_client_callback_unary_factory_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_client_callback_unary_factory.html">grpc::internal::ClientCallbackUnaryFactory</a></div><div class="ttdef"><b>Definition:</b> client_callback.h:1192</div></div>
    259. 

  259. <div class="ttc" id="aclassgrpc_1_1_channel_interface_html_a3f5145d4778aa952540dc9983cefe13f"><div class="ttname"><a href="classgrpc_1_1_channel_interface.html#a3f5145d4778aa952540dc9983cefe13f">grpc::ChannelInterface::~ChannelInterface</a></div><div class="ttdeci">virtual ~ChannelInterface()</div><div class="ttdef"><b>Definition:</b> channel_interface.h:73</div></div>
    260. 

  260. <div class="ttc" id="aclassgrpc_1_1_client_reader_writer_html"><div class="ttname"><a href="classgrpc_1_1_client_reader_writer.html">grpc::ClientReaderWriter</a></div><div class="ttdoc">Synchronous (blocking) client-side API for bi-directional streaming RPCs, where the outgoing message ...</div><div class="ttdef"><b>Definition:</b> channel_interface.h:33</div></div>
    261. 

  261. <div class="ttc" id="aclassgrpc_1_1_channel_interface_html_a68e987e7b87ca5a2668419736f9ee9b1"><div class="ttname"><a href="classgrpc_1_1_channel_interface.html#a68e987e7b87ca5a2668419736f9ee9b1">grpc::ChannelInterface::GetState</a></div><div class="ttdeci">virtual grpc_connectivity_state GetState(bool try_to_connect)=0</div><div class="ttdoc">Get the current channel state.</div></div>
    262. 

  262. <div class="ttc" id="agrpcpp_2impl_2codegen_2call_8h_html"><div class="ttname"><a href="grpcpp_2impl_2codegen_2call_8h.html">call.h</a></div></div>
    263. 

  263. <div class="ttc" id="aclassgrpc_1_1_completion_queue_html"><div class="ttname"><a href="classgrpc_1_1_completion_queue.html">grpc::CompletionQueue</a></div><div class="ttdoc">A thin wrapper around grpc_completion_queue (see src/core/lib/surface/completion_queue....</div><div class="ttdef"><b>Definition:</b> completion_queue.h:102</div></div>
    264. 

  264. <div class="ttc" id="aclassgrpc_1_1internal_1_1_client_callback_reader_factory_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_client_callback_reader_factory.html">grpc::internal::ClientCallbackReaderFactory</a></div><div class="ttdef"><b>Definition:</b> channel_interface.h:47</div></div>
    265. 

  265. <div class="ttc" id="aclassgrpc_1_1internal_1_1_client_async_writer_factory_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_client_async_writer_factory.html">grpc::internal::ClientAsyncWriterFactory</a></div><div class="ttdef"><b>Definition:</b> async_stream.h:314</div></div>
    266. 

  266. <div class="ttc" id="aclassgrpc_1_1internal_1_1_rpc_method_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_rpc_method.html">grpc::internal::RpcMethod</a></div><div class="ttdoc">Descriptor of an RPC method.</div><div class="ttdef"><b>Definition:</b> rpc_method.h:29</div></div>
    267. 

  267. <div class="ttc" id="aclassgrpc_1_1_channel_interface_html_ad2ffa0dffc84f1fe38084c0993c4ca50"><div class="ttname"><a href="classgrpc_1_1_channel_interface.html#ad2ffa0dffc84f1fe38084c0993c4ca50">grpc::ChannelInterface::NotifyOnStateChange</a></div><div class="ttdeci">void NotifyOnStateChange(grpc_connectivity_state last_observed, T deadline, ::grpc::CompletionQueue *cq, void *tag)</div><div class="ttdoc">Return the tag on cq when the channel state is changed or deadline expires.</div><div class="ttdef"><b>Definition:</b> channel_interface.h:81</div></div>
    268. 

  268. <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>
    269. 

  269. <div class="ttc" id="aconnectivity__state_8h_html_a065b65f5cdd062a67d82e2b6bcf68cf2aab01ef3f78d9236dfa3c751dc66aa7ea"><div class="ttname"><a href="connectivity__state_8h.html#a065b65f5cdd062a67d82e2b6bcf68cf2aab01ef3f78d9236dfa3c751dc66aa7ea">GRPC_CHANNEL_READY</a></div><div class="ttdeci">@ GRPC_CHANNEL_READY</div><div class="ttdoc">channel is ready for work</div><div class="ttdef"><b>Definition:</b> connectivity_state.h:33</div></div>
    270. 

  270. <div class="ttc" id="aclassgrpc_1_1_time_point_html"><div class="ttname"><a href="classgrpc_1_1_time_point.html">grpc::TimePoint</a></div><div class="ttdoc">If you are trying to use CompletionQueue::AsyncNext with a time class that isn't either gpr_timespec ...</div><div class="ttdef"><b>Definition:</b> time.h:40</div></div>
    271. 

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