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| <div class="title">dynamiclibrary.hpp</div> </div> |
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| <a href="posix_2dynamiclibrary_8hpp.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">// Licensed under the Apache License, Version 2.0 (the "License");</span></div> |
| <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// you may not use this file except in compliance with the License.</span></div> |
| <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// You may obtain a copy of the License at</span></div> |
| <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div> |
| <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div> |
| <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">//</span></div> |
| <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div> |
| <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div> |
| <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div> |
| <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// See the License for the specific language governing permissions and</span></div> |
| <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// limitations under the License.</span></div> |
| <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> </div> |
| <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#ifndef __STOUT_POSIX_DYNAMICLIBRARY_HPP__</span></div> |
| <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor"></span><span class="preprocessor">#define __STOUT_POSIX_DYNAMICLIBRARY_HPP__</span></div> |
| <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor"></span></div> |
| <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <dlfcn.h></span></div> |
| <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div> |
| <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include <string></span></div> |
| <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div> |
| <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include <<a class="code" href="nothing_8hpp.html">stout/nothing.hpp</a>></span></div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <<a class="code" href="option_8hpp.html">stout/option.hpp</a>></span></div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <<a class="code" href="try_8hpp.html">stout/try.hpp</a>></span></div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div> |
| <div class="line"><a name="l00028"></a><span class="lineno"><a class="line" href="classDynamicLibrary.html"> 28</a></span> <span class="keyword">class </span><a class="code" href="classDynamicLibrary.html">DynamicLibrary</a></div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> {</div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="keyword">public</span>:</div> |
| <div class="line"><a name="l00031"></a><span class="lineno"><a class="line" href="classDynamicLibrary.html#a5068283b12c51f6f3589f18ba7075494"> 31</a></span>  <a class="code" href="classDynamicLibrary.html#a5068283b12c51f6f3589f18ba7075494">DynamicLibrary</a>() : handle_(nullptr) { }</div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="comment">// Since this class manages a naked handle it cannot be copy- or</span></div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="comment">// move-constructed.</span></div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="comment">// TODO(bbannier): Allow for move-construction.</span></div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <a class="code" href="classDynamicLibrary.html#a5068283b12c51f6f3589f18ba7075494">DynamicLibrary</a>(<span class="keyword">const</span> <a class="code" href="classDynamicLibrary.html">DynamicLibrary</a>&) = <span class="keyword">delete</span>;</div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <a class="code" href="classDynamicLibrary.html#a5068283b12c51f6f3589f18ba7075494">DynamicLibrary</a>(<a class="code" href="classDynamicLibrary.html">DynamicLibrary</a>&&) = <span class="keyword">delete</span>;</div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div> |
| <div class="line"><a name="l00039"></a><span class="lineno"><a class="line" href="classDynamicLibrary.html#a42c1fe0f7a71004c823df00a9526c616"> 39</a></span>  <span class="keyword">virtual</span> <a class="code" href="classDynamicLibrary.html#a42c1fe0f7a71004c823df00a9526c616">~DynamicLibrary</a>()</div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  {</div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordflow">if</span> (handle_ != <span class="keyword">nullptr</span>) {</div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <a class="code" href="classDynamicLibrary.html#a4c65d79591c7fb3173916dec0a1ddd8e">close</a>();</div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  }</div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  }</div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div> |
| <div class="line"><a name="l00046"></a><span class="lineno"><a class="line" href="classDynamicLibrary.html#a8c86c304bbcce3680ecea2b4115fb09a"> 46</a></span>  <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="classDynamicLibrary.html#a8c86c304bbcce3680ecea2b4115fb09a">open</a>(<span class="keyword">const</span> std::string& path)</div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  {</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="comment">// Check if we've already opened a library.</span></div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordflow">if</span> (handle_ != <span class="keyword">nullptr</span>) {</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"Library already opened"</span>);</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  }</div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  handle_ = dlopen(path.c_str(), RTLD_NOW);</div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">if</span> (handle_ == <span class="keyword">nullptr</span>) {</div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"Could not load library '"</span> + path + <span class="stringliteral">"': "</span> + dlerror());</div> |
| <div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  }</div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  path_ = path;</div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">return</span> <a class="code" href="structNothing.html">Nothing</a>();</div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  }</div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div> |
| <div class="line"><a name="l00064"></a><span class="lineno"><a class="line" href="classDynamicLibrary.html#a4c65d79591c7fb3173916dec0a1ddd8e"> 64</a></span>  <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="classDynamicLibrary.html#a4c65d79591c7fb3173916dec0a1ddd8e">close</a>()</div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  {</div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">if</span> (handle_ == <span class="keyword">nullptr</span>) {</div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"Could not close library; handle was already `nullptr`"</span>);</div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  }</div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">if</span> (dlclose(handle_) != 0) {</div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(</div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="stringliteral">"Could not close library '"</span> +</div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  (path_.<a class="code" href="classOption.html#a4e3bf8416d95246f43c91f1b5c309323">isSome</a>() ? path_.<a class="code" href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">get</a>() : <span class="stringliteral">""</span>) + <span class="stringliteral">"': "</span> + dlerror());</div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  }</div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  handle_ = <span class="keyword">nullptr</span>;</div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  path_ = <a class="code" href="structNone.html">None</a>();</div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">return</span> <a class="code" href="structNothing.html">Nothing</a>();</div> |
| <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  }</div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div> |
| <div class="line"><a name="l00082"></a><span class="lineno"><a class="line" href="classDynamicLibrary.html#a0ab4cac9af777fb64c70863534f1c64a"> 82</a></span>  <a class="code" href="classTry.html">Try<void*></a> <a class="code" href="classDynamicLibrary.html#a0ab4cac9af777fb64c70863534f1c64a">loadSymbol</a>(<span class="keyword">const</span> std::string& <a class="code" href="namespaceos_1_1Shell.html#acfe16ef2b1146ad49a8651c0a457ce46">name</a>)</div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  {</div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">if</span> (handle_ == <span class="keyword">nullptr</span>) {</div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(</div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="stringliteral">"Could not get symbol '"</span> + name + <span class="stringliteral">"'; library handle was `nullptr`"</span>);</div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  }</div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span> </div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordtype">void</span>* symbol = dlsym(handle_, name.c_str());</div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordflow">if</span> (symbol == <span class="keyword">nullptr</span>) {</div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(</div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="stringliteral">"Error looking up symbol '"</span> + name + <span class="stringliteral">"' in '"</span> +</div> |
| <div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  (path_.<a class="code" href="classOption.html#a4e3bf8416d95246f43c91f1b5c309323">isSome</a>() ? path_.<a class="code" href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">get</a>() : <span class="stringliteral">""</span>) + <span class="stringliteral">"' : "</span> + dlerror());</div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  }</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span> </div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">return</span> symbol;</div> |
| <div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  }</div> |
| <div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div> |
| <div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="keyword">private</span>:</div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordtype">void</span>* handle_;</div> |
| <div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <a class="code" href="classOption.html">Option<std::string></a> path_;</div> |
| <div class="line"><a name="l00103"></a><span class="lineno"> 103</span> };</div> |
| <div class="line"><a name="l00104"></a><span class="lineno"> 104</span> </div> |
| <div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="preprocessor">#endif // __STOUT_POSIX_DYNAMICLIBRARY_HPP__</span></div> |
| <div class="ttc" id="classDynamicLibrary_html_a8c86c304bbcce3680ecea2b4115fb09a"><div class="ttname"><a href="classDynamicLibrary.html#a8c86c304bbcce3680ecea2b4115fb09a">DynamicLibrary::open</a></div><div class="ttdeci">Try< Nothing > open(const std::string &path)</div><div class="ttdef"><b>Definition:</b> dynamiclibrary.hpp:46</div></div> |
| <div class="ttc" id="structNothing_html"><div class="ttname"><a href="structNothing.html">Nothing</a></div><div class="ttdef"><b>Definition:</b> nothing.hpp:16</div></div> |
| <div class="ttc" id="classError_html"><div class="ttname"><a href="classError.html">Error</a></div><div class="ttdef"><b>Definition:</b> errorbase.hpp:35</div></div> |
| <div class="ttc" id="classOption_html"><div class="ttname"><a href="classOption.html">Option< std::string ></a></div></div> |
| <div class="ttc" id="classTry_html"><div class="ttname"><a href="classTry.html">Try</a></div><div class="ttdef"><b>Definition:</b> try.hpp:34</div></div> |
| <div class="ttc" id="classDynamicLibrary_html_a0ab4cac9af777fb64c70863534f1c64a"><div class="ttname"><a href="classDynamicLibrary.html#a0ab4cac9af777fb64c70863534f1c64a">DynamicLibrary::loadSymbol</a></div><div class="ttdeci">Try< void * > loadSymbol(const std::string &name)</div><div class="ttdef"><b>Definition:</b> dynamiclibrary.hpp:82</div></div> |
| <div class="ttc" id="classOption_html_a4e3bf8416d95246f43c91f1b5c309323"><div class="ttname"><a href="classOption.html#a4e3bf8416d95246f43c91f1b5c309323">Option::isSome</a></div><div class="ttdeci">bool isSome() const </div><div class="ttdef"><b>Definition:</b> option.hpp:108</div></div> |
| <div class="ttc" id="nothing_8hpp_html"><div class="ttname"><a href="nothing_8hpp.html">nothing.hpp</a></div></div> |
| <div class="ttc" id="classOption_html_a21358442c0fac1cc978a67a9a9089a79"><div class="ttname"><a href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">Option::get</a></div><div class="ttdeci">const T & get() const &</div><div class="ttdef"><b>Definition:</b> option.hpp:111</div></div> |
| <div class="ttc" id="option_8hpp_html"><div class="ttname"><a href="option_8hpp.html">option.hpp</a></div></div> |
| <div class="ttc" id="classDynamicLibrary_html"><div class="ttname"><a href="classDynamicLibrary.html">DynamicLibrary</a></div><div class="ttdoc">DynamicLibrary is a very simple wrapper around the programming interface to the dynamic linking loade...</div><div class="ttdef"><b>Definition:</b> dynamiclibrary.hpp:28</div></div> |
| <div class="ttc" id="structNone_html"><div class="ttname"><a href="structNone.html">None</a></div><div class="ttdef"><b>Definition:</b> none.hpp:27</div></div> |
| <div class="ttc" id="classDynamicLibrary_html_a5068283b12c51f6f3589f18ba7075494"><div class="ttname"><a href="classDynamicLibrary.html#a5068283b12c51f6f3589f18ba7075494">DynamicLibrary::DynamicLibrary</a></div><div class="ttdeci">DynamicLibrary()</div><div class="ttdef"><b>Definition:</b> dynamiclibrary.hpp:31</div></div> |
| <div class="ttc" id="classDynamicLibrary_html_a4c65d79591c7fb3173916dec0a1ddd8e"><div class="ttname"><a href="classDynamicLibrary.html#a4c65d79591c7fb3173916dec0a1ddd8e">DynamicLibrary::close</a></div><div class="ttdeci">Try< Nothing > close()</div><div class="ttdef"><b>Definition:</b> dynamiclibrary.hpp:64</div></div> |
| <div class="ttc" id="try_8hpp_html"><div class="ttname"><a href="try_8hpp.html">try.hpp</a></div></div> |
| <div class="ttc" id="classDynamicLibrary_html_a42c1fe0f7a71004c823df00a9526c616"><div class="ttname"><a href="classDynamicLibrary.html#a42c1fe0f7a71004c823df00a9526c616">DynamicLibrary::~DynamicLibrary</a></div><div class="ttdeci">virtual ~DynamicLibrary()</div><div class="ttdef"><b>Definition:</b> dynamiclibrary.hpp:39</div></div> |
| <div class="ttc" id="namespaceos_1_1Shell_html_acfe16ef2b1146ad49a8651c0a457ce46"><div class="ttname"><a href="namespaceos_1_1Shell.html#acfe16ef2b1146ad49a8651c0a457ce46">os::Shell::name</a></div><div class="ttdeci">constexpr const char * name</div><div class="ttdef"><b>Definition:</b> shell.hpp:41</div></div> |
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