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  69. <div class="title">LibraryUtils.hpp</div>  </div>

  70. </div><!--header-->

  71. <div class="contents">

  72. <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/*</span></div>

  73. <div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * DISTRHO Plugin Framework (DPF)</span></div>

  74. <div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * Copyright (C) 2012-2021 Filipe Coelho &lt;falktx@falktx.com&gt;</span></div>

  75. <div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> *</span></div>

  76. <div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * Permission to use, copy, modify, and/or distribute this software for any purpose with</span></div>

  77. <div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * or without fee is hereby granted, provided that the above copyright notice and this</span></div>

  78. <div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> * permission notice appear in all copies.</span></div>

  79. <div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"> *</span></div>

  80. <div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment"> * THE SOFTWARE IS PROVIDED &quot;AS IS&quot; AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD</span></div>

  81. <div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment"> * TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN</span></div>

  82. <div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment"> * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL</span></div>

  83. <div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment"> * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER</span></div>

  84. <div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment"> * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN</span></div>

  85. <div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment"> * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</span></div>

  86. <div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment"> */</span></div>

  87. <div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160; </div>

  88. <div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="preprocessor">#ifndef DISTRHO_LIBRARY_UTILS_HPP_INCLUDED</span></div>

  89. <div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="preprocessor">#define DISTRHO_LIBRARY_UTILS_HPP_INCLUDED</span></div>

  90. <div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160; </div>

  91. <div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="preprocessor">#include &quot;../DistrhoUtils.hpp&quot;</span></div>

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

  93. <div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor">#ifdef DISTRHO_OS_WINDOWS</span></div>

  94. <div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="preprocessor"># include &lt;winsock2.h&gt;</span></div>

  95. <div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="preprocessor"># include &lt;windows.h&gt;</span></div>

  96. <div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="keyword">typedef</span> HMODULE lib_t;</div>

  97. <div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="preprocessor">#else</span></div>

  98. <div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="preprocessor"># include &lt;dlfcn.h&gt;</span></div>

  99. <div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="keyword">typedef</span> <span class="keywordtype">void</span>* lib_t;</div>

  100. <div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="preprocessor">#endif</span></div>

  101. <div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160; </div>

  102. <div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="comment">// -----------------------------------------------------------------------</span></div>

  103. <div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="comment">// library related calls</span></div>

  104. <div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160; </div>

  105. <div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="comment">/*</span></div>

  106. <div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="comment"> * Open &#39;filename&#39; library (must not be null).</span></div>

  107. <div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="comment"> * May return null, in which case &quot;lib_error&quot; has the error.</span></div>

  108. <div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="comment"> */</span></div>

  109. <div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="keyword">static</span> <span class="keyword">inline</span></div>

  110. <div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;lib_t lib_open(<span class="keyword">const</span> <span class="keywordtype">char</span>* <span class="keyword">const</span> filename) noexcept</div>

  111. <div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;{</div>

  112. <div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;    DISTRHO_SAFE_ASSERT_RETURN(filename != <span class="keyword">nullptr</span> &amp;&amp; filename[0] != <span class="charliteral">&#39;\0&#39;</span>, <span class="keyword">nullptr</span>);</div>

  113. <div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160; </div>

  114. <div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;    <span class="keywordflow">try</span> {</div>

  115. <div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="preprocessor">#ifdef DISTRHO_OS_WINDOWS</span></div>

  116. <div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;        return ::LoadLibraryA(filename);</div>

  117. <div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="preprocessor">#else</span></div>

  118. <div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;        return ::dlopen(filename, RTLD_NOW|RTLD_LOCAL);</div>

  119. <div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="preprocessor">#endif</span></div>

  120. <div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;    } DISTRHO_SAFE_EXCEPTION_RETURN(<span class="stringliteral">&quot;lib_open&quot;</span>, <span class="keyword">nullptr</span>);</div>

  121. <div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;}</div>

  122. <div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160; </div>

  123. <div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;<span class="comment">/*</span></div>

  124. <div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;<span class="comment"> * Close a previously opened library (must not be null).</span></div>

  125. <div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="comment"> * If false is returned, &quot;lib_error&quot; has the error.</span></div>

  126. <div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;<span class="comment"> */</span></div>

  127. <div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;<span class="keyword">static</span> <span class="keyword">inline</span></div>

  128. <div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;<span class="keywordtype">bool</span> lib_close(<span class="keyword">const</span> lib_t lib) noexcept</div>

  129. <div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;{</div>

  130. <div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;    DISTRHO_SAFE_ASSERT_RETURN(lib != <span class="keyword">nullptr</span>, <span class="keyword">false</span>);</div>

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

  132. <div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;    <span class="keywordflow">try</span> {</div>

  133. <div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;<span class="preprocessor">#ifdef DISTRHO_OS_WINDOWS</span></div>

  134. <div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;        return ::FreeLibrary(lib);</div>

  135. <div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;<span class="preprocessor">#else</span></div>

  136. <div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;        <span class="keywordflow">return</span> (::dlclose(lib) == 0);</div>

  137. <div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;<span class="preprocessor">#endif</span></div>

  138. <div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;    } DISTRHO_SAFE_EXCEPTION_RETURN(<span class="stringliteral">&quot;lib_close&quot;</span>, <span class="keyword">false</span>);</div>

  139. <div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;}</div>

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

  141. <div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;<span class="comment">/*</span></div>

  142. <div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;<span class="comment"> * Get a library symbol (must not be null).</span></div>

  143. <div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;<span class="comment"> * Returns null if the symbol is not found.</span></div>

  144. <div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;<span class="comment"> */</span></div>

  145. <div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> Func&gt;</div>

  146. <div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;<span class="keyword">static</span> <span class="keyword">inline</span></div>

  147. <div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;Func lib_symbol(<span class="keyword">const</span> lib_t lib, <span class="keyword">const</span> <span class="keywordtype">char</span>* <span class="keyword">const</span> symbol) noexcept</div>

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

  149. <div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;    DISTRHO_SAFE_ASSERT_RETURN(lib != <span class="keyword">nullptr</span>, <span class="keyword">nullptr</span>);</div>

  150. <div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;    DISTRHO_SAFE_ASSERT_RETURN(symbol != <span class="keyword">nullptr</span> &amp;&amp; symbol[0] != <span class="charliteral">&#39;\0&#39;</span>, <span class="keyword">nullptr</span>);</div>

  151. <div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160; </div>

  152. <div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;    <span class="keywordflow">try</span> {</div>

  153. <div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;<span class="preprocessor">#ifdef DISTRHO_OS_WINDOWS</span></div>

  154. <div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;<span class="preprocessor"># if defined(__GNUC__) &amp;&amp; (__GNUC__ &gt;= 9)</span></div>

  155. <div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;<span class="preprocessor">#  pragma GCC diagnostic push</span></div>

  156. <div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;<span class="preprocessor">#  pragma GCC diagnostic ignored &quot;-Wcast-function-type&quot;</span></div>

  157. <div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;<span class="preprocessor"># endif</span></div>

  158. <div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;        <span class="keywordflow">return</span> (Func)::GetProcAddress(lib, symbol);</div>

  159. <div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;<span class="preprocessor"># if defined(__GNUC__) &amp;&amp; (__GNUC__ &gt;= 9)</span></div>

  160. <div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;<span class="preprocessor">#  pragma GCC diagnostic pop</span></div>

  161. <div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;<span class="preprocessor"># endif</span></div>

  162. <div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;<span class="preprocessor">#else</span></div>

  163. <div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;        <span class="keywordflow">return</span> (Func)(uintptr_t)::dlsym(lib, symbol);</div>

  164. <div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;<span class="preprocessor">#endif</span></div>

  165. <div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;    } DISTRHO_SAFE_EXCEPTION_RETURN(<span class="stringliteral">&quot;lib_symbol&quot;</span>, <span class="keyword">nullptr</span>);</div>

  166. <div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;}</div>

  167. <div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160; </div>

  168. <div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;<span class="comment">/*</span></div>

  169. <div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;<span class="comment"> * Return the last operation error (&#39;filename&#39; must not be null).</span></div>

  170. <div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;<span class="comment"> * May return null.</span></div>

  171. <div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;<span class="comment"> */</span></div>

  172. <div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;<span class="keyword">static</span> <span class="keyword">inline</span></div>

  173. <div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;<span class="keyword">const</span> <span class="keywordtype">char</span>* lib_error(<span class="keyword">const</span> <span class="keywordtype">char</span>* <span class="keyword">const</span> filename) noexcept</div>

  174. <div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;{</div>

  175. <div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;    DISTRHO_SAFE_ASSERT_RETURN(filename != <span class="keyword">nullptr</span> &amp;&amp; filename[0] != <span class="charliteral">&#39;\0&#39;</span>, <span class="keyword">nullptr</span>);</div>

  176. <div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160; </div>

  177. <div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;<span class="preprocessor">#ifdef DISTRHO_OS_WINDOWS</span></div>

  178. <div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;    <span class="keyword">static</span> <span class="keywordtype">char</span> libError[2048+1];</div>

  179. <div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;    std::memset(libError, 0, <span class="keyword">sizeof</span>(libError));</div>

  180. <div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160; </div>

  181. <div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;    <span class="keywordflow">try</span> {</div>

  182. <div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;        <span class="keyword">const</span> DWORD winErrorCode  = ::GetLastError();</div>

  183. <div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;        <span class="keyword">const</span> <span class="keywordtype">int</span>   winErrorFlags = FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS;</div>

  184. <div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;        LPVOID      winErrorString;</div>

  185. <div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160; </div>

  186. <div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;        ::FormatMessage(winErrorFlags, <span class="keyword">nullptr</span>, winErrorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&amp;winErrorString, 0, <span class="keyword">nullptr</span>);</div>

  187. <div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160; </div>

  188. <div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;        std::snprintf(libError, 2048, <span class="stringliteral">&quot;%s: error code %li: %s&quot;</span>, filename, winErrorCode, (<span class="keyword">const</span> <span class="keywordtype">char</span>*)winErrorString);</div>

  189. <div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;        ::LocalFree(winErrorString);</div>

  190. <div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;    } DISTRHO_SAFE_EXCEPTION(<span class="stringliteral">&quot;lib_error&quot;</span>);</div>

  191. <div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160; </div>

  192. <div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;    <span class="keywordflow">return</span> (libError[0] != <span class="charliteral">&#39;\0&#39;</span>) ? libError : <span class="keyword">nullptr</span>;</div>

  193. <div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;<span class="preprocessor">#else</span></div>

  194. <div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;    return ::dlerror();</div>

  195. <div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;<span class="preprocessor">#endif</span></div>

  196. <div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;}</div>

  197. <div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160; </div>

  198. <div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;<span class="comment">// -----------------------------------------------------------------------</span></div>

  199. <div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160; </div>

  200. <div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;<span class="preprocessor">#endif // DISTRHO_LIBRARY_UTILS_HPP_INCLUDED</span></div>

  201. </div><!-- fragment --></div><!-- contents -->

  202. <!-- start footer part -->

  203. <hr class="footer"/><address class="footer"><small>

  204. Generated on Mon Jun 14 2021 12:26:11 for DISTRHO Plugin Framework by &#160;<a href="http://www.doxygen.org/index.html">

  205. <img class="footer" src="doxygen.png" alt="doxygen"/>

  206. </a> 1.8.17

  207. </small></address>

  208. </body>

  209. </html>