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<a href="dynamic__library_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">// Copyright 2010-2021 Google LLC</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">// Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment">// you may not use this file except in compliance with the License.</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment">// You may obtain a copy of the License at</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment">// distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment">// See the License for the specific language governing permissions and</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="comment">// limitations under the License.</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;</div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="preprocessor">#ifndef OR_TOOLS_BASE_DYNAMIC_LIBRARY_H_</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="preprocessor">#define OR_TOOLS_BASE_DYNAMIC_LIBRARY_H_</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="preprocessor">#include &lt;functional&gt;</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="preprocessor">#include &lt;stdexcept&gt;</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="preprocessor">#include &lt;string&gt;</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="base_2logging_8h.html">ortools/base/logging.h</a>&quot;</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="preprocessor">#if defined(_MSC_VER)</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="preprocessor">#define WIN32_LEAN_AND_MEAN // disables several conflicting macros</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;<span class="preprocessor">#include &lt;windows.h&gt;</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;<span class="preprocessor">#elif defined(__GNUC__)</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="preprocessor">#include &lt;dlfcn.h&gt;</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;</div><div class="line"><a name="l00030"></a><span class="lineno"><a class="line" href="class_dynamic_library.html"> 30</a></span>&#160;<span class="keyword">class </span><a class="code" href="class_dynamic_library.html">DynamicLibrary</a> {</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; <span class="keyword">public</span>:</div><div class="line"><a name="l00032"></a><span class="lineno"><a class="line" href="class_dynamic_library.html#ab433dc8e6d2a3cf87f56e9f0658c12de"> 32</a></span>&#160; <a class="code" href="class_dynamic_library.html#ab433dc8e6d2a3cf87f56e9f0658c12de">DynamicLibrary</a>() : library_handle_(nullptr) {}</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;</div><div class="line"><a name="l00034"></a><span class="lineno"><a class="line" href="class_dynamic_library.html#a995bc0595e32ef0d1a0a408b8da08615"> 34</a></span>&#160; <a class="code" href="class_dynamic_library.html#a995bc0595e32ef0d1a0a408b8da08615">~DynamicLibrary</a>() {</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; <span class="keywordflow">if</span> (library_handle_ == <span class="keyword">nullptr</span>) {</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; <span class="keywordflow">return</span>;</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; }</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;<span class="preprocessor">#if defined(_MSC_VER)</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; FreeLibrary(static_cast&lt;HINSTANCE&gt;(library_handle_));</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160;<span class="preprocessor">#elif defined(__GNUC__)</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; dlclose(library_handle_);</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; }</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;</div><div class="line"><a name="l00046"></a><span class="lineno"><a class="line" href="class_dynamic_library.html#a7c961d016cc8694db859ca9260f3e553"> 46</a></span>&#160; <span class="keywordtype">bool</span> <a class="code" href="class_dynamic_library.html#a7c961d016cc8694db859ca9260f3e553">TryToLoad</a>(<span class="keyword">const</span> std::string&amp; library_name) {</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; library_name_ = std::string(library_name);</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;<span class="preprocessor">#if defined(_MSC_VER)</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; library_handle_ = static_cast&lt;void*&gt;(LoadLibrary(library_name.c_str()));</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160;<span class="preprocessor">#elif defined(__GNUC__)</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; library_handle_ = dlopen(library_name.c_str(), RTLD_NOW);</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="keywordflow">return</span> library_handle_ != <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; }</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;</div><div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="class_dynamic_library.html#afc2eff6666031583a0f6c183f2e3ed52"> 56</a></span>&#160; <span class="keywordtype">bool</span> <a class="code" href="class_dynamic_library.html#afc2eff6666031583a0f6c183f2e3ed52">LibraryIsLoaded</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> library_handle_ != <span class="keyword">nullptr</span>; }</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00059"></a><span class="lineno"><a class="line" href="class_dynamic_library.html#a20afab9ed7f3ab0ec028854573061c04"> 59</a></span>&#160; std::function&lt;T&gt; <a class="code" href="class_dynamic_library.html#a20afab9ed7f3ab0ec028854573061c04">GetFunction</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* function_name) {</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="keyword">const</span> <span class="keywordtype">void</span>* function_address =</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160;<span class="preprocessor">#if defined(_MSC_VER)</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; static_cast&lt;void*&gt;(GetProcAddress(</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; static_cast&lt;HINSTANCE&gt;(library_handle_), function_name));</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160;<span class="preprocessor">#else</span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; dlsym(library_handle_, function_name);</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(function_address != <span class="keyword">nullptr</span>)</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; &lt;&lt; <span class="stringliteral">&quot;Error: could not find function &quot;</span> &lt;&lt; std::string(function_name)</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; &lt;&lt; <span class="stringliteral">&quot; in &quot;</span> &lt;&lt; library_name_;</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; <span class="keywordflow">return</span> TypeParser&lt;T&gt;::CreateFunction(function_address);</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; }</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160;</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="class_dynamic_library.html#ad3abe0b22c9f8894e4c2da55b0fb763d"> 76</a></span>&#160; std::function&lt;T&gt; <a class="code" href="class_dynamic_library.html#ad3abe0b22c9f8894e4c2da55b0fb763d">GetFunction</a>(<span class="keyword">const</span> std::string&amp; function_name) {</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; <span class="keywordflow">return</span> GetFunction&lt;T&gt;(function_name.c_str());</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">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00081"></a><span class="lineno"><a class="line" href="class_dynamic_library.html#acf74b26fd423267e20d348de4942d784"> 81</a></span>&#160; <span class="keywordtype">void</span> <a class="code" href="class_dynamic_library.html#acf74b26fd423267e20d348de4942d784">GetFunction</a>(std::function&lt;T&gt;* <span class="keyword">function</span>, <span class="keyword">const</span> <span class="keywordtype">char</span>* function_name) {</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; *<span class="keyword">function</span> = GetFunction&lt;T&gt;(function_name);</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; }</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160;</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00086"></a><span class="lineno"><a class="line" href="class_dynamic_library.html#aab057573b6283fd7b47e3162f00c1e49"> 86</a></span>&#160; <span class="keywordtype">void</span> <a class="code" href="class_dynamic_library.html#aab057573b6283fd7b47e3162f00c1e49">GetFunction</a>(std::function&lt;T&gt;* <span class="keyword">function</span>,</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <span class="keyword">const</span> std::string function_name) {</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; GetFunction&lt;T&gt;(<span class="keyword">function</span>, function_name.c_str());</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;</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <span class="keyword">private</span>:</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <span class="keywordtype">void</span>* library_handle_ = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; std::string library_name_;</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160;</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; <span class="keyword">struct </span>TypeParser {};</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160;</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Ret, <span class="keyword">typename</span>... Args&gt;</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; <span class="keyword">struct </span>TypeParser&lt;Ret(Args...)&gt; {</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; <span class="keyword">static</span> std::function&lt;Ret(Args...)&gt; CreateFunction(</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; <span class="keyword">const</span> <span class="keywordtype">void</span>* function_address) {</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; <span class="keywordflow">return</span> std::function&lt;Ret(Args...)&gt;(<span class="keyword">reinterpret_cast&lt;</span>Ret (*)(Args...)<span class="keyword">&gt;</span>(</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; const_cast&lt;void*&gt;(function_address)));</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; }</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; };</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160;};</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160;</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160;<span class="preprocessor">#endif // OR_TOOLS_BASE_DYNAMIC_LIBRARY_H_</span></div><div class="ttc" id="base_2logging_8h_html_a3e1cfef60e774a81f30eaddf26a3a274"><div class="ttname"><a href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a></div><div class="ttdeci">#define CHECK(condition)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00491">base/logging.h:491</a></div></div>
<div class="ttc" id="class_dynamic_library_html"><div class="ttname"><a href="class_dynamic_library.html">DynamicLibrary</a></div><div class="ttdef"><b>Definition:</b> <a href="dynamic__library_8h_source.html#l00030">dynamic_library.h:30</a></div></div>
<div class="ttc" id="class_dynamic_library_html_ab433dc8e6d2a3cf87f56e9f0658c12de"><div class="ttname"><a href="class_dynamic_library.html#ab433dc8e6d2a3cf87f56e9f0658c12de">DynamicLibrary::DynamicLibrary</a></div><div class="ttdeci">DynamicLibrary()</div><div class="ttdef"><b>Definition:</b> <a href="dynamic__library_8h_source.html#l00032">dynamic_library.h:32</a></div></div>
<div class="ttc" id="class_dynamic_library_html_afc2eff6666031583a0f6c183f2e3ed52"><div class="ttname"><a href="class_dynamic_library.html#afc2eff6666031583a0f6c183f2e3ed52">DynamicLibrary::LibraryIsLoaded</a></div><div class="ttdeci">bool LibraryIsLoaded() const</div><div class="ttdef"><b>Definition:</b> <a href="dynamic__library_8h_source.html#l00056">dynamic_library.h:56</a></div></div>
<div class="ttc" id="class_dynamic_library_html_a995bc0595e32ef0d1a0a408b8da08615"><div class="ttname"><a href="class_dynamic_library.html#a995bc0595e32ef0d1a0a408b8da08615">DynamicLibrary::~DynamicLibrary</a></div><div class="ttdeci">~DynamicLibrary()</div><div class="ttdef"><b>Definition:</b> <a href="dynamic__library_8h_source.html#l00034">dynamic_library.h:34</a></div></div>
<div class="ttc" id="class_dynamic_library_html_a20afab9ed7f3ab0ec028854573061c04"><div class="ttname"><a href="class_dynamic_library.html#a20afab9ed7f3ab0ec028854573061c04">DynamicLibrary::GetFunction</a></div><div class="ttdeci">std::function&lt; T &gt; GetFunction(const char *function_name)</div><div class="ttdef"><b>Definition:</b> <a href="dynamic__library_8h_source.html#l00059">dynamic_library.h:59</a></div></div>
<div class="ttc" id="class_dynamic_library_html_ad3abe0b22c9f8894e4c2da55b0fb763d"><div class="ttname"><a href="class_dynamic_library.html#ad3abe0b22c9f8894e4c2da55b0fb763d">DynamicLibrary::GetFunction</a></div><div class="ttdeci">std::function&lt; T &gt; GetFunction(const std::string &amp;function_name)</div><div class="ttdef"><b>Definition:</b> <a href="dynamic__library_8h_source.html#l00076">dynamic_library.h:76</a></div></div>
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