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<li class="navelem"><a class="el" href="dir_d44c64559bbebec7f509842c48db8b23.html">include</a></li><li class="navelem"><a class="el" href="dir_1143c7affb9ebd026cb6818dd282def7.html">mxnet</a></li> </ul>
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<a href="engine_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><div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment"> * Licensed to the Apache Software Foundation (ASF) under one</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment"> * or more contributor license agreements. See the NOTICE file</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment"> * distributed with this work for additional information</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"> * regarding copyright ownership. The ASF licenses this file</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"> * to you under the Apache License, Version 2.0 (the</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"> * &quot;License&quot;); you may not use this file except in compliance</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment"> * with the License. You may obtain a copy of the License at</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="comment"> * Unless required by applicable law or agreed to in writing,</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="comment"> * software distributed under the License is distributed on an</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment"> * &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="comment"> * KIND, either express or implied. See the License for the</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment"> * specific language governing permissions and limitations</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="comment"> * under the License.</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="preprocessor">#ifndef MXNET_ENGINE_H_</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;<span class="preprocessor">#define MXNET_ENGINE_H_</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="preprocessor">#if DMLC_USE_CXX11</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="preprocessor">#include &lt;algorithm&gt;</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="preprocessor">#include &lt;memory&gt;</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="preprocessor">#include &lt;functional&gt;</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="include_2mxnet_2base_8h.html">./base.h</a>&quot;</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacemxnet.html">mxnet</a> {</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;<span class="comment">// forward declare engine</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;<span class="keyword">class </span>Engine;</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;</div><div class="line"><a name="l00041"></a><span class="lineno"><a class="line" href="namespacemxnet_1_1engine.html"> 41</a></span>&#160;<span class="keyword">namespace </span>engine {</div><div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="structmxnet_1_1engine_1_1Var.html"> 43</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structmxnet_1_1engine_1_1Var.html">Var</a> {</div><div class="line"><a name="l00044"></a><span class="lineno"><a class="line" href="structmxnet_1_1engine_1_1Var.html#a5ae9f575784f18598df8824ccd421c18"> 44</a></span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">size_t</span> <a class="code" href="structmxnet_1_1engine_1_1Var.html#a5ae9f575784f18598df8824ccd421c18">version</a>() {</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; <span class="keywordflow">return</span> <a class="code" href="structmxnet_1_1engine_1_1Var.html#a43edd2b4bd955d283b3dff5e3f66279d">version_</a>;</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; }</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <span class="keyword">virtual</span> <a class="code" href="structmxnet_1_1engine_1_1Var.html#af9884f59707511d65ecdb04a6dab0423">~Var</a>() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; <span class="keyword">inline</span> T* <a class="code" href="structmxnet_1_1engine_1_1Var.html#af71c04da3c374220356efa98cc215590">Cast</a>();</div><div class="line"><a name="l00059"></a><span class="lineno"><a class="line" href="structmxnet_1_1engine_1_1Var.html#a43edd2b4bd955d283b3dff5e3f66279d"> 59</a></span>&#160; <span class="keywordtype">size_t</span> <a class="code" href="structmxnet_1_1engine_1_1Var.html#a43edd2b4bd955d283b3dff5e3f66279d">version_</a>{0};</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160;}; <span class="comment">// struct Var</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160;</div><div class="line"><a name="l00063"></a><span class="lineno"><a class="line" href="namespacemxnet_1_1engine.html#a9d36c4f33eae8531586dc2edf83ae7cf"> 63</a></span>&#160;<span class="keyword">struct </span>Opr;</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160;<span class="keyword">typedef</span> <a class="code" href="structmxnet_1_1engine_1_1Var.html">Var</a>* <a class="code" href="namespacemxnet_1_1engine.html#a9d36c4f33eae8531586dc2edf83ae7cf">VarHandle</a>;</div><div class="line"><a name="l00067"></a><span class="lineno"><a class="line" href="namespacemxnet_1_1engine.html#a2d9b14b658e3f3c4e03ca49cd38ace94"> 67</a></span>&#160;<span class="keyword">typedef</span> Opr* <a class="code" href="namespacemxnet_1_1engine.html#a2d9b14b658e3f3c4e03ca49cd38ace94">OprHandle</a>;</div><div class="line"><a name="l00072"></a><span class="lineno"><a class="line" href="classmxnet_1_1engine_1_1CallbackOnComplete.html"> 72</a></span>&#160;<span class="keyword">class </span><a class="code" href="classmxnet_1_1engine_1_1CallbackOnComplete.html">CallbackOnComplete</a> {</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; <span class="keyword">public</span>:</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; <span class="comment">// use implicit copy and assign</span></div><div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="classmxnet_1_1engine_1_1CallbackOnComplete.html#aadfc4d64cee7555f9ef105172d855fc5"> 76</a></span>&#160;<span class="comment"></span> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1engine_1_1CallbackOnComplete.html#aadfc4d64cee7555f9ef105172d855fc5">operator()</a>(<span class="keyword">const</span> dmlc::Error* error = <span class="keyword">nullptr</span>)<span class="keyword"> const </span>{</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; (*callback_)(engine_, param_, error);</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; }</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160;</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; <span class="keyword">private</span>:</div><div class="line"><a name="l00082"></a><span class="lineno"><a class="line" href="classmxnet_1_1engine_1_1CallbackOnComplete.html#aa365d0be0a3a369cdc5da59787f93297"> 82</a></span>&#160; <span class="keyword">friend</span> class ::mxnet::Engine;</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; void (*callback_)(<a class="code" href="classmxnet_1_1Engine.html">Engine</a> *, <span class="keywordtype">void</span> *, <span class="keyword">const</span> dmlc::Error *);</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; <a class="code" href="classmxnet_1_1Engine.html">Engine</a>* engine_;</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; <span class="keywordtype">void</span>* param_;</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160;};</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160;} <span class="comment">// namespace engine</span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160;</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160;<span class="preprocessor">#if DMLC_USE_CXX11</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160;</div><div class="line"><a name="l00094"></a><span class="lineno"><a class="line" href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3b"> 94</a></span>&#160;<span class="keyword">enum class</span> <a class="code" href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3b">FnProperty</a> {</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; <a class="code" href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3ba07fa7a19aa722c635a15e94cb7f50416">kNormal</a>,</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; <a class="code" href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3ba739f2f416f05f4728c217f09e93958d1">kCopyFromGPU</a>,</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; <a class="code" href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3ba6cd75f41e0ec8d61b0a2f0e20ef6d1e8">kCopyToGPU</a>,</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; <a class="code" href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3bac41ceb98eeb9b2e208e3e242a7357142">kCPUPrioritized</a>,</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; <a class="code" href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3ba9f2b960005d2a3a5f35ac32809d84db7">kAsync</a>,</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; <a class="code" href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3bac41fda8552e9d327ad3b06b1bafa663a">kDeleteVar</a>,</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; <a class="code" href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3ba4879e1f172ddec6223d17ea90e691ddd">kGPUPrioritized</a>,</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; <a class="code" href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3bac76ad5584b42e2ba06f1b5e9ebac8b2a">kNoSkip</a></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160;}; <span class="comment">// enum class FnProperty</span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160;</div><div class="line"><a name="l00116"></a><span class="lineno"><a class="line" href="classmxnet_1_1Engine.html"> 116</a></span>&#160;<span class="keyword">class </span><a class="code" href="include_2mxnet_2base_8h.html#a91a09948aaaffa1eb64508db79009a05">MXNET_API</a> <a class="code" href="classmxnet_1_1Engine.html">Engine</a> {</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; <span class="keyword">public</span>:</div><div class="line"><a name="l00119"></a><span class="lineno"><a class="line" href="classmxnet_1_1Engine.html#a16b757432556f835d27f1b5e1dbe1b06"> 119</a></span>&#160; <span class="keyword">typedef</span> <a class="code" href="classmxnet_1_1engine_1_1CallbackOnComplete.html">engine::CallbackOnComplete</a> <a class="code" href="classmxnet_1_1Engine.html#a16b757432556f835d27f1b5e1dbe1b06">CallbackOnComplete</a>;</div><div class="line"><a name="l00121"></a><span class="lineno"><a class="line" href="classmxnet_1_1Engine.html#a07f30ab85fca436e1bbcc72cd4d8bb35"> 121</a></span>&#160; <span class="keyword">typedef</span> std::function&lt;void(RunContext)&gt; <a class="code" href="classmxnet_1_1Engine.html#a07f30ab85fca436e1bbcc72cd4d8bb35">SyncFn</a>;</div><div class="line"><a name="l00123"></a><span class="lineno"><a class="line" href="classmxnet_1_1Engine.html#ad41feff70bba0f29fc24f60b5381984c"> 123</a></span>&#160; <span class="keyword">typedef</span> std::function&lt;void(RunContext, CallbackOnComplete)&gt; <a class="code" href="classmxnet_1_1Engine.html#ad41feff70bba0f29fc24f60b5381984c">AsyncFn</a>;</div><div class="line"><a name="l00125"></a><span class="lineno"><a class="line" href="classmxnet_1_1Engine.html#aac31510c793a12944c33f9cac6150491"> 125</a></span>&#160; <span class="keyword">typedef</span> <a class="code" href="structmxnet_1_1engine_1_1Var.html">engine::VarHandle</a> <a class="code" href="classmxnet_1_1Engine.html#aac31510c793a12944c33f9cac6150491">VarHandle</a>;</div><div class="line"><a name="l00127"></a><span class="lineno"><a class="line" href="classmxnet_1_1Engine.html#a832436e413a075291aa1a631942c3f01"> 127</a></span>&#160; <span class="keyword">typedef</span> <a class="code" href="namespacemxnet_1_1engine.html#a2d9b14b658e3f3c4e03ca49cd38ace94">engine::OprHandle</a> <a class="code" href="classmxnet_1_1Engine.html#a832436e413a075291aa1a631942c3f01">OprHandle</a>;</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> NotifyShutdown() = 0;</div><div class="line"><a name="l00139"></a><span class="lineno"><a class="line" href="classmxnet_1_1Engine.html#a30f8947a7a1ad86b4c2cdb5b15b6d1e1"> 139</a></span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1Engine.html#a30f8947a7a1ad86b4c2cdb5b15b6d1e1">Stop</a>() {</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160; LOG(FATAL) &lt;&lt; <span class="stringliteral">&quot;Engine cannot be stopped&quot;</span>;</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160; }</div><div class="line"><a name="l00145"></a><span class="lineno"><a class="line" href="classmxnet_1_1Engine.html#a136a1d60db77a0846faa8462d0fb6237"> 145</a></span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1Engine.html#a136a1d60db77a0846faa8462d0fb6237">Start</a>() {</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160; LOG(FATAL) &lt;&lt; <span class="stringliteral">&quot;Engine cannot be restarted&quot;</span>;</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; }</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160; <span class="keyword">virtual</span> VarHandle NewVariable() = 0;</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160; <span class="keyword">virtual</span> OprHandle NewOperator(AsyncFn fn,</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160; std::vector&lt;VarHandle&gt; <span class="keyword">const</span>&amp; const_vars,</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160; std::vector&lt;VarHandle&gt; <span class="keyword">const</span>&amp; mutable_vars,</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160; <a class="code" href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3b">FnProperty</a> prop = <a class="code" href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3ba07fa7a19aa722c635a15e94cb7f50416">FnProperty::kNormal</a>,</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; <span class="keyword">const</span> <span class="keywordtype">char</span>* opr_name = <span class="keyword">nullptr</span>,</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; <span class="keywordtype">bool</span> wait = <span class="keyword">false</span>) = 0;</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> DeleteOperator(OprHandle op) = 0;</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> Push(OprHandle op, <a class="code" href="structmxnet_1_1Context.html">Context</a> exec_ctx, <span class="keywordtype">int</span> priority = 0, <span class="keywordtype">bool</span> profiling = <span class="keyword">false</span>) = 0;</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> PushAsync(AsyncFn exec_fun, <a class="code" href="structmxnet_1_1Context.html">Context</a> exec_ctx,</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; std::vector&lt;VarHandle&gt; <span class="keyword">const</span>&amp; const_vars,</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160; std::vector&lt;VarHandle&gt; <span class="keyword">const</span>&amp; mutable_vars,</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160; <a class="code" href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3b">FnProperty</a> prop = <a class="code" href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3ba07fa7a19aa722c635a15e94cb7f50416">FnProperty::kNormal</a>,</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; <span class="keywordtype">int</span> priority = 0,</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160; <span class="keyword">const</span> <span class="keywordtype">char</span>* opr_name = <span class="keyword">nullptr</span>,</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160; <span class="keywordtype">bool</span> wait = <span class="keyword">false</span>) = 0;</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> DeleteVariable(SyncFn delete_fn,</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160; <a class="code" href="structmxnet_1_1Context.html">Context</a> exec_ctx,</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160; VarHandle var) = 0;</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> WaitForVar(VarHandle var) = 0;</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> WaitForAll() = 0;</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> Throw(VarHandle var) = 0;</div><div class="line"><a name="l00237"></a><span class="lineno"><a class="line" href="classmxnet_1_1Engine.html#aff025321827e15096c02342225f2395b"> 237</a></span>&#160; <span class="keyword">virtual</span> <a class="code" href="classmxnet_1_1Engine.html#aff025321827e15096c02342225f2395b">~Engine</a>() noexcept(false) {}</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>&#160; <span class="keyword">static</span> <a class="code" href="classmxnet_1_1Engine.html">Engine</a>* Get();</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160; <span class="keyword">static</span> std::shared_ptr&lt;Engine&gt; _GetSharedRef();</div><div class="line"><a name="l00263"></a><span class="lineno"><a class="line" href="classmxnet_1_1Engine.html#ac4c1d74e906699cf074a34dfdc968d8c"> 263</a></span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1Engine.html#ac4c1d74e906699cf074a34dfdc968d8c">PushSync</a>(SyncFn exec_fn, <a class="code" href="structmxnet_1_1Context.html">Context</a> exec_ctx,</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>&#160; std::vector&lt;VarHandle&gt; <span class="keyword">const</span>&amp; const_vars,</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>&#160; std::vector&lt;VarHandle&gt; <span class="keyword">const</span>&amp; mutable_vars,</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>&#160; <a class="code" href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3b">FnProperty</a> prop = <a class="code" href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3ba07fa7a19aa722c635a15e94cb7f50416">FnProperty::kNormal</a>,</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>&#160; <span class="keywordtype">int</span> priority = 0,</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>&#160; <span class="keyword">const</span> <span class="keywordtype">char</span>* opr_name = <span class="keyword">nullptr</span>) {</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>&#160; this-&gt;PushAsync([exec_fn](<a class="code" href="structmxnet_1_1RunContext.html">RunContext</a> ctx, CallbackOnComplete on_complete) {</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>&#160; exec_fn(ctx);</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span>&#160; on_complete();</div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>&#160; }, exec_ctx, const_vars, mutable_vars, prop, priority, opr_name);</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>&#160; }</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>&#160;</div><div class="line"><a name="l00280"></a><span class="lineno"><a class="line" href="classmxnet_1_1Engine.html#a53659c833b8cac3cbcd15a152275a809"> 280</a></span>&#160; <span class="keyword">inline</span> CallbackOnComplete <a class="code" href="classmxnet_1_1Engine.html#a53659c833b8cac3cbcd15a152275a809">CreateCallback</a>(</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>&#160; <span class="keywordtype">void</span> (*callback)(<a class="code" href="classmxnet_1_1Engine.html">Engine</a> *, <span class="keywordtype">void</span> *, <span class="keyword">const</span> dmlc::Error *), <span class="keywordtype">void</span> *param) {</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>&#160; CallbackOnComplete ret;</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>&#160; ret.callback_ = callback;</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>&#160; ret.engine_ = <span class="keyword">this</span>;</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>&#160; ret.param_ = param;</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>&#160; <span class="keywordflow">return</span> ret;</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>&#160; }</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>&#160; <span class="comment">// For each var vector, sort it and remove the duplicated vars.</span></div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>&#160; <span class="comment">// Also remove vars from read_vars if it also appears in write_vars</span></div><div class="line"><a name="l00290"></a><span class="lineno"><a class="line" href="classmxnet_1_1Engine.html#a9d8ac1987a6844dba9b0463030fb3430"> 290</a></span>&#160; <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1Engine.html#a9d8ac1987a6844dba9b0463030fb3430">DeduplicateVarHandle</a>(std::vector&lt;engine::VarHandle&gt; *read_vars,</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>&#160; std::vector&lt;engine::VarHandle&gt; *write_vars) {</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>&#160; std::sort(write_vars-&gt;begin(), write_vars-&gt;end());</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>&#160; write_vars-&gt;resize(std::unique(write_vars-&gt;begin(), write_vars-&gt;end()) -</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>&#160; write_vars-&gt;begin());</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>&#160; std::sort(read_vars-&gt;begin(), read_vars-&gt;end());</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>&#160; read_vars-&gt;resize(std::unique(read_vars-&gt;begin(), read_vars-&gt;end()) -</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>&#160; read_vars-&gt;begin());</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>&#160; <span class="keyword">auto</span> wit = write_vars-&gt;begin();</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>&#160; <span class="keyword">auto</span> rtop = read_vars-&gt;begin();</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>&#160; <span class="keywordflow">for</span> (<span class="keyword">auto</span> rit = read_vars-&gt;begin(); rit != read_vars-&gt;end(); ++rit) {</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>&#160; <span class="keywordflow">while</span> (wit != write_vars-&gt;end() &amp;&amp; *wit &lt; *rit) ++wit;</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>&#160; <span class="keywordflow">if</span> (wit == write_vars-&gt;end() || *wit != *rit) {</div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>&#160; *rtop = *rit;</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>&#160; ++rtop;</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>&#160; }</div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>&#160; }</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>&#160; read_vars-&gt;resize(rtop - read_vars-&gt;begin());</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>&#160; }</div><div class="line"><a name="l00310"></a><span class="lineno"><a class="line" href="classmxnet_1_1Engine.html#aa3cc0ead60033689efdc28dba2d3a372"> 310</a></span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">int</span> <a class="code" href="classmxnet_1_1Engine.html#aa3cc0ead60033689efdc28dba2d3a372">bulk_size</a>()<span class="keyword"> const </span>{</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>&#160; <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>&#160; }</div><div class="line"><a name="l00314"></a><span class="lineno"><a class="line" href="classmxnet_1_1Engine.html#ac33a02d6827b43c27c04371d8ef04ef4"> 314</a></span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">int</span> <a class="code" href="classmxnet_1_1Engine.html#ac33a02d6827b43c27c04371d8ef04ef4">set_bulk_size</a>(<span class="keywordtype">int</span>) {</div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span>&#160; <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>&#160; }</div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>&#160;}; <span class="comment">// class Engine</span></div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>&#160;<span class="preprocessor">#endif // DMLC_USE_CXX11</span></div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>&#160;} <span class="comment">// namespace mxnet</span></div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>&#160;<span class="preprocessor">#endif // MXNET_ENGINE_H_</span></div><div class="ttc" id="classmxnet_1_1Engine_html_a9d8ac1987a6844dba9b0463030fb3430"><div class="ttname"><a href="classmxnet_1_1Engine.html#a9d8ac1987a6844dba9b0463030fb3430">mxnet::Engine::DeduplicateVarHandle</a></div><div class="ttdeci">void DeduplicateVarHandle(std::vector&lt; engine::VarHandle &gt; *read_vars, std::vector&lt; engine::VarHandle &gt; *write_vars)</div><div class="ttdef"><b>Definition:</b> engine.h:290</div></div>
<div class="ttc" id="namespacemxnet_html_a998b74220fab2b012cf8a179650e1b3b"><div class="ttname"><a href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3b">mxnet::FnProperty</a></div><div class="ttdeci">FnProperty</div><div class="ttdoc">Function property, used to hint what action is pushed to engine. </div><div class="ttdef"><b>Definition:</b> engine.h:94</div></div>
<div class="ttc" id="classmxnet_1_1Engine_html_a30f8947a7a1ad86b4c2cdb5b15b6d1e1"><div class="ttname"><a href="classmxnet_1_1Engine.html#a30f8947a7a1ad86b4c2cdb5b15b6d1e1">mxnet::Engine::Stop</a></div><div class="ttdeci">virtual void Stop()</div><div class="ttdoc">Stop all workers in the engine. </div><div class="ttdef"><b>Definition:</b> engine.h:139</div></div>
<div class="ttc" id="classmxnet_1_1Engine_html_a07f30ab85fca436e1bbcc72cd4d8bb35"><div class="ttname"><a href="classmxnet_1_1Engine.html#a07f30ab85fca436e1bbcc72cd4d8bb35">mxnet::Engine::SyncFn</a></div><div class="ttdeci">std::function&lt; void(RunContext)&gt; SyncFn</div><div class="ttdoc">Synchronous operation to pass to engine. </div><div class="ttdef"><b>Definition:</b> engine.h:121</div></div>
<div class="ttc" id="classmxnet_1_1Engine_html_aa3cc0ead60033689efdc28dba2d3a372"><div class="ttname"><a href="classmxnet_1_1Engine.html#aa3cc0ead60033689efdc28dba2d3a372">mxnet::Engine::bulk_size</a></div><div class="ttdeci">virtual int bulk_size() const</div><div class="ttdoc">query current limit for bulk size </div><div class="ttdef"><b>Definition:</b> engine.h:310</div></div>
<div class="ttc" id="classmxnet_1_1Engine_html_ad41feff70bba0f29fc24f60b5381984c"><div class="ttname"><a href="classmxnet_1_1Engine.html#ad41feff70bba0f29fc24f60b5381984c">mxnet::Engine::AsyncFn</a></div><div class="ttdeci">std::function&lt; void(RunContext, CallbackOnComplete)&gt; AsyncFn</div><div class="ttdoc">Asynchronous operation to pass to engine. </div><div class="ttdef"><b>Definition:</b> engine.h:123</div></div>
<div class="ttc" id="namespacemxnet_html_a998b74220fab2b012cf8a179650e1b3bac76ad5584b42e2ba06f1b5e9ebac8b2a"><div class="ttname"><a href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3bac76ad5584b42e2ba06f1b5e9ebac8b2a">mxnet::FnProperty::kNoSkip</a></div><div class="ttdoc">Operation not to be skipped even with associated exception. </div></div>
<div class="ttc" id="structmxnet_1_1engine_1_1Var_html_a43edd2b4bd955d283b3dff5e3f66279d"><div class="ttname"><a href="structmxnet_1_1engine_1_1Var.html#a43edd2b4bd955d283b3dff5e3f66279d">mxnet::engine::Var::version_</a></div><div class="ttdeci">size_t version_</div><div class="ttdoc">version number of the var. Every time the object it is associated with is modified, the version number is incremented by 1. </div><div class="ttdef"><b>Definition:</b> engine.h:59</div></div>
<div class="ttc" id="namespacemxnet_html"><div class="ttname"><a href="namespacemxnet.html">mxnet</a></div><div class="ttdoc">namespace of mxnet </div><div class="ttdef"><b>Definition:</b> api_registry.h:33</div></div>
<div class="ttc" id="namespacemxnet_html_a998b74220fab2b012cf8a179650e1b3ba9f2b960005d2a3a5f35ac32809d84db7"><div class="ttname"><a href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3ba9f2b960005d2a3a5f35ac32809d84db7">mxnet::FnProperty::kAsync</a></div><div class="ttdoc">Asynchronous function call. </div></div>
<div class="ttc" id="structmxnet_1_1RunContext_html"><div class="ttname"><a href="structmxnet_1_1RunContext.html">mxnet::RunContext</a></div><div class="ttdoc">execution time context. The information needed in runtime for actual execution. </div><div class="ttdef"><b>Definition:</b> base.h:349</div></div>
<div class="ttc" id="structmxnet_1_1engine_1_1Var_html"><div class="ttname"><a href="structmxnet_1_1engine_1_1Var.html">mxnet::engine::Var</a></div><div class="ttdoc">base class of engine variables. </div><div class="ttdef"><b>Definition:</b> engine.h:43</div></div>
<div class="ttc" id="namespacemxnet_html_a998b74220fab2b012cf8a179650e1b3bac41fda8552e9d327ad3b06b1bafa663a"><div class="ttname"><a href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3bac41fda8552e9d327ad3b06b1bafa663a">mxnet::FnProperty::kDeleteVar</a></div><div class="ttdoc">Delete variable call. </div></div>
<div class="ttc" id="namespacemxnet_html_a998b74220fab2b012cf8a179650e1b3ba07fa7a19aa722c635a15e94cb7f50416"><div class="ttname"><a href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3ba07fa7a19aa722c635a15e94cb7f50416">mxnet::FnProperty::kNormal</a></div><div class="ttdoc">Normal operation. </div></div>
<div class="ttc" id="structmxnet_1_1engine_1_1Var_html_af9884f59707511d65ecdb04a6dab0423"><div class="ttname"><a href="structmxnet_1_1engine_1_1Var.html#af9884f59707511d65ecdb04a6dab0423">mxnet::engine::Var::~Var</a></div><div class="ttdeci">virtual ~Var()=default</div></div>
<div class="ttc" id="classmxnet_1_1Engine_html_aff025321827e15096c02342225f2395b"><div class="ttname"><a href="classmxnet_1_1Engine.html#aff025321827e15096c02342225f2395b">mxnet::Engine::~Engine</a></div><div class="ttdeci">virtual ~Engine() noexcept(false)</div><div class="ttdoc">virtual destructor </div><div class="ttdef"><b>Definition:</b> engine.h:237</div></div>
<div class="ttc" id="classmxnet_1_1Engine_html_a53659c833b8cac3cbcd15a152275a809"><div class="ttname"><a href="classmxnet_1_1Engine.html#a53659c833b8cac3cbcd15a152275a809">mxnet::Engine::CreateCallback</a></div><div class="ttdeci">CallbackOnComplete CreateCallback(void(*callback)(Engine *, void *, const dmlc::Error *), void *param)</div><div class="ttdoc">factory function to create OnComplete callback. </div><div class="ttdef"><b>Definition:</b> engine.h:280</div></div>
<div class="ttc" id="namespacemxnet_html_a998b74220fab2b012cf8a179650e1b3ba4879e1f172ddec6223d17ea90e691ddd"><div class="ttname"><a href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3ba4879e1f172ddec6223d17ea90e691ddd">mxnet::FnProperty::kGPUPrioritized</a></div><div class="ttdoc">Prioritized sync operation on GPU. </div></div>
<div class="ttc" id="classmxnet_1_1Engine_html_a136a1d60db77a0846faa8462d0fb6237"><div class="ttname"><a href="classmxnet_1_1Engine.html#a136a1d60db77a0846faa8462d0fb6237">mxnet::Engine::Start</a></div><div class="ttdeci">virtual void Start()</div><div class="ttdoc">Restart all workers in the engine. </div><div class="ttdef"><b>Definition:</b> engine.h:145</div></div>
<div class="ttc" id="namespacemxnet_html_a998b74220fab2b012cf8a179650e1b3ba739f2f416f05f4728c217f09e93958d1"><div class="ttname"><a href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3ba739f2f416f05f4728c217f09e93958d1">mxnet::FnProperty::kCopyFromGPU</a></div><div class="ttdoc">Copy operation from GPU to other devices. </div></div>
<div class="ttc" id="classmxnet_1_1Engine_html_ac33a02d6827b43c27c04371d8ef04ef4"><div class="ttname"><a href="classmxnet_1_1Engine.html#ac33a02d6827b43c27c04371d8ef04ef4">mxnet::Engine::set_bulk_size</a></div><div class="ttdeci">virtual int set_bulk_size(int)</div><div class="ttdoc">set maximum limit for bulk size </div><div class="ttdef"><b>Definition:</b> engine.h:314</div></div>
<div class="ttc" id="classmxnet_1_1Engine_html_a832436e413a075291aa1a631942c3f01"><div class="ttname"><a href="classmxnet_1_1Engine.html#a832436e413a075291aa1a631942c3f01">mxnet::Engine::OprHandle</a></div><div class="ttdeci">engine::OprHandle OprHandle</div><div class="ttdoc">Operator pointer. </div><div class="ttdef"><b>Definition:</b> engine.h:127</div></div>
<div class="ttc" id="classmxnet_1_1Engine_html_aac31510c793a12944c33f9cac6150491"><div class="ttname"><a href="classmxnet_1_1Engine.html#aac31510c793a12944c33f9cac6150491">mxnet::Engine::VarHandle</a></div><div class="ttdeci">engine::VarHandle VarHandle</div><div class="ttdoc">Variable pointer. </div><div class="ttdef"><b>Definition:</b> engine.h:125</div></div>
<div class="ttc" id="namespacemxnet_1_1engine_html_a9d36c4f33eae8531586dc2edf83ae7cf"><div class="ttname"><a href="namespacemxnet_1_1engine.html#a9d36c4f33eae8531586dc2edf83ae7cf">mxnet::engine::VarHandle</a></div><div class="ttdeci">Var * VarHandle</div><div class="ttdoc">Variable pointer type, usually hold by user used to specify dependencies. </div><div class="ttdef"><b>Definition:</b> engine.h:63</div></div>
<div class="ttc" id="namespacemxnet_html_a998b74220fab2b012cf8a179650e1b3bac41ceb98eeb9b2e208e3e242a7357142"><div class="ttname"><a href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3bac41ceb98eeb9b2e208e3e242a7357142">mxnet::FnProperty::kCPUPrioritized</a></div><div class="ttdoc">Prioritized sync operation on CPU. </div></div>
<div class="ttc" id="classmxnet_1_1Engine_html_a16b757432556f835d27f1b5e1dbe1b06"><div class="ttname"><a href="classmxnet_1_1Engine.html#a16b757432556f835d27f1b5e1dbe1b06">mxnet::Engine::CallbackOnComplete</a></div><div class="ttdeci">engine::CallbackOnComplete CallbackOnComplete</div><div class="ttdoc">callback on complete </div><div class="ttdef"><b>Definition:</b> engine.h:119</div></div>
<div class="ttc" id="include_2mxnet_2base_8h_html"><div class="ttname"><a href="include_2mxnet_2base_8h.html">base.h</a></div></div>
<div class="ttc" id="classmxnet_1_1Engine_html_ac4c1d74e906699cf074a34dfdc968d8c"><div class="ttname"><a href="classmxnet_1_1Engine.html#ac4c1d74e906699cf074a34dfdc968d8c">mxnet::Engine::PushSync</a></div><div class="ttdeci">virtual void PushSync(SyncFn exec_fn, Context exec_ctx, std::vector&lt; VarHandle &gt; const &amp;const_vars, std::vector&lt; VarHandle &gt; const &amp;mutable_vars, FnProperty prop=FnProperty::kNormal, int priority=0, const char *opr_name=nullptr)</div><div class="ttdoc">Push an synchronous operation to the engine. </div><div class="ttdef"><b>Definition:</b> engine.h:263</div></div>
<div class="ttc" id="classmxnet_1_1Engine_html"><div class="ttname"><a href="classmxnet_1_1Engine.html">mxnet::Engine</a></div><div class="ttdoc">Dependency engine that schedules operations. </div><div class="ttdef"><b>Definition:</b> engine.h:116</div></div>
<div class="ttc" id="classmxnet_1_1engine_1_1CallbackOnComplete_html_aadfc4d64cee7555f9ef105172d855fc5"><div class="ttname"><a href="classmxnet_1_1engine_1_1CallbackOnComplete.html#aadfc4d64cee7555f9ef105172d855fc5">mxnet::engine::CallbackOnComplete::operator()</a></div><div class="ttdeci">void operator()(const dmlc::Error *error=nullptr) const</div><div class="ttdoc">involve the callback </div><div class="ttdef"><b>Definition:</b> engine.h:76</div></div>
<div class="ttc" id="classmxnet_1_1engine_1_1CallbackOnComplete_html"><div class="ttname"><a href="classmxnet_1_1engine_1_1CallbackOnComplete.html">mxnet::engine::CallbackOnComplete</a></div><div class="ttdoc">OnComplete Callback to the engine, called by AsyncFn when action completes. </div><div class="ttdef"><b>Definition:</b> engine.h:72</div></div>
<div class="ttc" id="structmxnet_1_1engine_1_1Var_html_af71c04da3c374220356efa98cc215590"><div class="ttname"><a href="structmxnet_1_1engine_1_1Var.html#af71c04da3c374220356efa98cc215590">mxnet::engine::Var::Cast</a></div><div class="ttdeci">T * Cast()</div><div class="ttdoc">cast variable to derived type T </div></div>
<div class="ttc" id="structmxnet_1_1Context_html"><div class="ttname"><a href="structmxnet_1_1Context.html">mxnet::Context</a></div><div class="ttdoc">Context information about the execution environment. </div><div class="ttdef"><b>Definition:</b> base.h:101</div></div>
<div class="ttc" id="include_2mxnet_2base_8h_html_a91a09948aaaffa1eb64508db79009a05"><div class="ttname"><a href="include_2mxnet_2base_8h.html#a91a09948aaaffa1eb64508db79009a05">MXNET_API</a></div><div class="ttdeci">#define MXNET_API</div><div class="ttdoc">define compatible keywords in g++ Used to support g++-4.6 and g++4.7 </div><div class="ttdef"><b>Definition:</b> base.h:62</div></div>
<div class="ttc" id="namespacemxnet_html_a998b74220fab2b012cf8a179650e1b3ba6cd75f41e0ec8d61b0a2f0e20ef6d1e8"><div class="ttname"><a href="namespacemxnet.html#a998b74220fab2b012cf8a179650e1b3ba6cd75f41e0ec8d61b0a2f0e20ef6d1e8">mxnet::FnProperty::kCopyToGPU</a></div><div class="ttdoc">Copy operation from CPU to other devices. </div></div>
<div class="ttc" id="namespacemxnet_1_1engine_html_a2d9b14b658e3f3c4e03ca49cd38ace94"><div class="ttname"><a href="namespacemxnet_1_1engine.html#a2d9b14b658e3f3c4e03ca49cd38ace94">mxnet::engine::OprHandle</a></div><div class="ttdeci">Opr * OprHandle</div><div class="ttdoc">Operator pointer type, usually hold by user. </div><div class="ttdef"><b>Definition:</b> engine.h:67</div></div>
<div class="ttc" id="structmxnet_1_1engine_1_1Var_html_a5ae9f575784f18598df8824ccd421c18"><div class="ttname"><a href="structmxnet_1_1engine_1_1Var.html#a5ae9f575784f18598df8824ccd421c18">mxnet::engine::Var::version</a></div><div class="ttdeci">virtual size_t version()</div><div class="ttdef"><b>Definition:</b> engine.h:44</div></div>
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