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197 lines
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<div class="title">gurobi_callback.h</div> </div>
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<a href="gurobi__callback_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> <span class="comment">// Copyright 2010-2021 Google LLC</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// you may not use this file except in compliance with the License.</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// You may obtain a copy of the License at</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// See the License for the specific language governing permissions and</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// limitations under the License.</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  </div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#ifndef OR_TOOLS_MATH_OPT_SOLVERS_GUROBI_CALLBACK_H_</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#define OR_TOOLS_MATH_OPT_SOLVERS_GUROBI_CALLBACK_H_</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  </div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include <cstdint></span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include <vector></span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  </div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include "absl/container/flat_hash_set.h"</span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include "absl/status/status.h"</span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include "absl/time/time.h"</span></div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include "<a class="code" href="linked__hash__map_8h.html">ortools/base/linked_hash_map.h</a>"</span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include "ortools/math_opt/callback.pb.h"</span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include "<a class="code" href="solver__interface_8h.html">ortools/math_opt/solver_interface.h</a>"</span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include "<a class="code" href="message__callback__data_8h.html">ortools/math_opt/solvers/message_callback_data.h</a>"</span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include "ortools/math_opt/sparse_containers.pb.h"</span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  </div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include "<a class="code" href="environment_8h.html">ortools/gurobi/environment.h</a>"</span></div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  </div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">namespace </span><a class="code" href="namespaceoperations__research.html">operations_research</a> {</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="keyword">namespace </span>math_opt {</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  </div>
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<div class="line"><a name="l00034"></a><span class="lineno"><a class="line" href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html"> 34</a></span> <span class="keyword">struct </span><a class="code" href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html">GurobiCallbackInput</a> {</div>
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<div class="line"><a name="l00035"></a><span class="lineno"><a class="line" href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#af4d74fe70a864d1ead9a9af72c09df62"> 35</a></span>  <a class="code" href="classoperations__research_1_1math__opt_1_1_solver_interface.html#ab47a61ca53ae9cdf35dd4f2dfc9ecadb">SolverInterface::Callback</a> <a class="code" href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#af4d74fe70a864d1ead9a9af72c09df62">user_cb</a>;</div>
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<div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#af931e986791e9c873c5282d74a9e8b0a"> 36</a></span>  <span class="keyword">const</span> <a class="code" href="classgtl_1_1linked__hash__map.html">gtl::linked_hash_map<int64_t, int></a>& <a class="code" href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#af931e986791e9c873c5282d74a9e8b0a">variable_ids</a>;</div>
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<div class="line"><a name="l00037"></a><span class="lineno"><a class="line" href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#a5eb1d7182a0941609d4a2bfbf774d1e2"> 37</a></span>  <span class="keywordtype">int</span> <a class="code" href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#a5eb1d7182a0941609d4a2bfbf774d1e2">num_gurobi_vars</a> = 0;</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="comment">// events[i] indicates if we should run user_cb when Gurobi's callback is</span></div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="comment">// triggered with where=i. See:</span></div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="comment">// https://www.gurobi.com/documentation/9.1/refman/cb_codes.html</span></div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="comment">// For list of possible values for where. See also EventToGurobiWhere() below.</span></div>
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<div class="line"><a name="l00042"></a><span class="lineno"><a class="line" href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#a4d083d364e0b7deb4191e275069f66f9"> 42</a></span>  std::vector<bool> <a class="code" href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#a4d083d364e0b7deb4191e275069f66f9">events</a>;</div>
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<div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#add7aff28c9c69ed2a08ac6c4625ca333"> 43</a></span>  <span class="keyword">const</span> SparseVectorFilterProto& <a class="code" href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#add7aff28c9c69ed2a08ac6c4625ca333">mip_solution_filter</a>;</div>
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<div class="line"><a name="l00044"></a><span class="lineno"><a class="line" href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#a5ebab0d4f1eb4d86700272b7f348abab"> 44</a></span>  <span class="keyword">const</span> SparseVectorFilterProto& <a class="code" href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#a5ebab0d4f1eb4d86700272b7f348abab">mip_node_filter</a>;</div>
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<div class="line"><a name="l00045"></a><span class="lineno"><a class="line" href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#ab49a861ea5322afb0399f71e0f5aeb9e"> 45</a></span>  <span class="keyword">const</span> absl::Time <a class="code" href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#ab49a861ea5322afb0399f71e0f5aeb9e">start</a>;</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> };</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  </div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment">// Converts a set of CallbackEventProto enums to a bit vector indicating which</span></div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment">// Gurobi callback events need to run our callback.</span></div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment">// The returned vector will have an entry for each possible value of "where"</span></div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment">// that Gurobi's callbacks can stop at, see the table here:</span></div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment">// https://www.gurobi.com/documentation/9.1/refman/cb_codes.html</span></div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> std::vector<bool> <a class="code" href="namespaceoperations__research_1_1math__opt.html#a90644d44a9987c14edfb1cd0d2605bc5">EventToGurobiWhere</a>(</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keyword">const</span> absl::flat_hash_set<CallbackEventProto>& events);</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  </div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> absl::Status <a class="code" href="namespaceoperations__research_1_1math__opt.html#aa0726d807a2d5a0679c067794b04ada6">GurobiCallbackImpl</a>(<a class="code" href="environment_8h.html#a865e461c79c88bc5c0d5f56087ae4876">GRBmodel</a>* grb_model, <span class="keywordtype">void</span>* cbdata, <span class="keywordtype">int</span> <a class="code" href="gurobi__interface_8cc.html#a675dd47bbf0a66c9cb592047797a6d69">where</a>,</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keyword">const</span> <a class="code" href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html">GurobiCallbackInput</a>& callback_input,</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <a class="code" href="classoperations__research_1_1math__opt_1_1_message_callback_data.html">MessageCallbackData</a>& message_callback_data);</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  </div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment">// Makes the final calls to the user callback with any buffered event if</span></div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment">// necessary. It must be called once at the end of the solve, and only if all</span></div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment">// previous callbacks succeeded (and the solve succeeded).</span></div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> absl::Status <a class="code" href="namespaceoperations__research_1_1math__opt.html#ab4c5bf9cf19938d8fcabd15e6ef95349">GurobiCallbackImplFlush</a>(</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keyword">const</span> <a class="code" href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html">GurobiCallbackInput</a>& callback_input,</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <a class="code" href="classoperations__research_1_1math__opt_1_1_message_callback_data.html">MessageCallbackData</a>& message_callback_data);</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  </div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> } <span class="comment">// namespace math_opt</span></div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> } <span class="comment">// namespace operations_research</span></div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor">#endif </span><span class="comment">// OR_TOOLS_MATH_OPT_SOLVERS_GUROBI_CALLBACK_H_</span></div>
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<div class="ttc" id="aclassgtl_1_1linked__hash__map_html"><div class="ttname"><a href="classgtl_1_1linked__hash__map.html">gtl::linked_hash_map< int64_t, int ></a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1math__opt_1_1_message_callback_data_html"><div class="ttname"><a href="classoperations__research_1_1math__opt_1_1_message_callback_data.html">operations_research::math_opt::MessageCallbackData</a></div><div class="ttdef"><b>Definition:</b> <a href="message__callback__data_8h_source.html#l00041">message_callback_data.h:41</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1math__opt_1_1_solver_interface_html_ab47a61ca53ae9cdf35dd4f2dfc9ecadb"><div class="ttname"><a href="classoperations__research_1_1math__opt_1_1_solver_interface.html#ab47a61ca53ae9cdf35dd4f2dfc9ecadb">operations_research::math_opt::SolverInterface::Callback</a></div><div class="ttdeci">std::function< absl::StatusOr< CallbackResultProto >(const CallbackDataProto &)> Callback</div><div class="ttdef"><b>Definition:</b> <a href="solver__interface_8h_source.html#l00054">solver_interface.h:55</a></div></div>
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<div class="ttc" id="aenvironment_8h_html"><div class="ttname"><a href="environment_8h.html">environment.h</a></div></div>
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<div class="ttc" id="aenvironment_8h_html_a865e461c79c88bc5c0d5f56087ae4876"><div class="ttname"><a href="environment_8h.html#a865e461c79c88bc5c0d5f56087ae4876">GRBmodel</a></div><div class="ttdeci">struct _GRBmodel GRBmodel</div><div class="ttdef"><b>Definition:</b> <a href="environment_8h_source.html#l00001">environment.h:24</a></div></div>
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<div class="ttc" id="agurobi__interface_8cc_html_a675dd47bbf0a66c9cb592047797a6d69"><div class="ttname"><a href="gurobi__interface_8cc.html#a675dd47bbf0a66c9cb592047797a6d69">where</a></div><div class="ttdeci">int where</div><div class="ttdef"><b>Definition:</b> <a href="gurobi__interface_8cc_source.html#l00275">gurobi_interface.cc:275</a></div></div>
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<div class="ttc" id="alinked__hash__map_8h_html"><div class="ttname"><a href="linked__hash__map_8h.html">linked_hash_map.h</a></div></div>
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<div class="ttc" id="amessage__callback__data_8h_html"><div class="ttname"><a href="message__callback__data_8h.html">message_callback_data.h</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1math__opt_html_a90644d44a9987c14edfb1cd0d2605bc5"><div class="ttname"><a href="namespaceoperations__research_1_1math__opt.html#a90644d44a9987c14edfb1cd0d2605bc5">operations_research::math_opt::EventToGurobiWhere</a></div><div class="ttdeci">std::vector< bool > EventToGurobiWhere(const absl::flat_hash_set< CallbackEventProto > &events)</div><div class="ttdef"><b>Definition:</b> <a href="gurobi__callback_8cc_source.html#l00395">gurobi_callback.cc:395</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1math__opt_html_aa0726d807a2d5a0679c067794b04ada6"><div class="ttname"><a href="namespaceoperations__research_1_1math__opt.html#aa0726d807a2d5a0679c067794b04ada6">operations_research::math_opt::GurobiCallbackImpl</a></div><div class="ttdeci">absl::Status GurobiCallbackImpl(GRBmodel *grb_model, void *cbdata, int where, const GurobiCallbackInput &callback_input, MessageCallbackData &message_callback_data)</div><div class="ttdef"><b>Definition:</b> <a href="gurobi__callback_8cc_source.html#l00404">gurobi_callback.cc:404</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1math__opt_html_ab4c5bf9cf19938d8fcabd15e6ef95349"><div class="ttname"><a href="namespaceoperations__research_1_1math__opt.html#ab4c5bf9cf19938d8fcabd15e6ef95349">operations_research::math_opt::GurobiCallbackImplFlush</a></div><div class="ttdeci">absl::Status GurobiCallbackImplFlush(const GurobiCallbackInput &callback_input, MessageCallbackData &message_callback_data)</div><div class="ttdef"><b>Definition:</b> <a href="gurobi__callback_8cc_source.html#l00427">gurobi_callback.cc:427</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_html"><div class="ttname"><a href="namespaceoperations__research.html">operations_research</a></div><div class="ttdoc">Collection of objects used to extend the Constraint Solver library.</div><div class="ttdef"><b>Definition:</b> <a href="dense__doubly__linked__list_8h_source.html#l00021">dense_doubly_linked_list.h:21</a></div></div>
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<div class="ttc" id="asolver__interface_8h_html"><div class="ttname"><a href="solver__interface_8h.html">solver_interface.h</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1math__opt_1_1_gurobi_callback_input_html"><div class="ttname"><a href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html">operations_research::math_opt::GurobiCallbackInput</a></div><div class="ttdef"><b>Definition:</b> <a href="gurobi__callback_8h_source.html#l00034">gurobi_callback.h:34</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1math__opt_1_1_gurobi_callback_input_html_a4d083d364e0b7deb4191e275069f66f9"><div class="ttname"><a href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#a4d083d364e0b7deb4191e275069f66f9">operations_research::math_opt::GurobiCallbackInput::events</a></div><div class="ttdeci">std::vector< bool > events</div><div class="ttdef"><b>Definition:</b> <a href="gurobi__callback_8h_source.html#l00042">gurobi_callback.h:42</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1math__opt_1_1_gurobi_callback_input_html_a5eb1d7182a0941609d4a2bfbf774d1e2"><div class="ttname"><a href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#a5eb1d7182a0941609d4a2bfbf774d1e2">operations_research::math_opt::GurobiCallbackInput::num_gurobi_vars</a></div><div class="ttdeci">int num_gurobi_vars</div><div class="ttdef"><b>Definition:</b> <a href="gurobi__callback_8h_source.html#l00037">gurobi_callback.h:37</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1math__opt_1_1_gurobi_callback_input_html_a5ebab0d4f1eb4d86700272b7f348abab"><div class="ttname"><a href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#a5ebab0d4f1eb4d86700272b7f348abab">operations_research::math_opt::GurobiCallbackInput::mip_node_filter</a></div><div class="ttdeci">const SparseVectorFilterProto & mip_node_filter</div><div class="ttdef"><b>Definition:</b> <a href="gurobi__callback_8h_source.html#l00044">gurobi_callback.h:44</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1math__opt_1_1_gurobi_callback_input_html_ab49a861ea5322afb0399f71e0f5aeb9e"><div class="ttname"><a href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#ab49a861ea5322afb0399f71e0f5aeb9e">operations_research::math_opt::GurobiCallbackInput::start</a></div><div class="ttdeci">const absl::Time start</div><div class="ttdef"><b>Definition:</b> <a href="gurobi__callback_8h_source.html#l00045">gurobi_callback.h:45</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1math__opt_1_1_gurobi_callback_input_html_add7aff28c9c69ed2a08ac6c4625ca333"><div class="ttname"><a href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#add7aff28c9c69ed2a08ac6c4625ca333">operations_research::math_opt::GurobiCallbackInput::mip_solution_filter</a></div><div class="ttdeci">const SparseVectorFilterProto & mip_solution_filter</div><div class="ttdef"><b>Definition:</b> <a href="gurobi__callback_8h_source.html#l00043">gurobi_callback.h:43</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1math__opt_1_1_gurobi_callback_input_html_af4d74fe70a864d1ead9a9af72c09df62"><div class="ttname"><a href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#af4d74fe70a864d1ead9a9af72c09df62">operations_research::math_opt::GurobiCallbackInput::user_cb</a></div><div class="ttdeci">SolverInterface::Callback user_cb</div><div class="ttdef"><b>Definition:</b> <a href="gurobi__callback_8h_source.html#l00035">gurobi_callback.h:35</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1math__opt_1_1_gurobi_callback_input_html_af931e986791e9c873c5282d74a9e8b0a"><div class="ttname"><a href="structoperations__research_1_1math__opt_1_1_gurobi_callback_input.html#af931e986791e9c873c5282d74a9e8b0a">operations_research::math_opt::GurobiCallbackInput::variable_ids</a></div><div class="ttdeci">const gtl::linked_hash_map< int64_t, int > & variable_ids</div><div class="ttdef"><b>Definition:</b> <a href="gurobi__callback_8h_source.html#l00036">gurobi_callback.h:36</a></div></div>
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