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<a href="Thread_8cpp.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">// This may look like C code, but it is really -*- C++ -*-</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment">// Copyright Bob Friesenhahn, 1999, 2000, 2001, 2002</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment">// Copyright Dirk Lemstra 2014-2017</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">// Implementation of thread support</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;</div><div class="line"><a name="l00009"></a><span class="lineno"><a class="line" href="Thread_8cpp.html#a24d8db5449916b4dd0283f5f30a5edc7"> 9</a></span>&#160;<span class="preprocessor">#define MAGICKCORE_IMPLEMENTATION 1</span></div><div class="line"><a name="l00010"></a><span class="lineno"><a class="line" href="Thread_8cpp.html#a99e08660df365803d576005502caf7e5"> 10</a></span>&#160;<span class="preprocessor">#define MAGICK_PLUSPLUS_IMPLEMENTATION 1</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;</div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="Thread_8h.html">Magick++/Thread.h</a>&quot;</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="Exception_8h.html">Magick++/Exception.h</a>&quot;</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;</div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="preprocessor">#include &lt;string.h&gt;</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="comment">// Default constructor</span></div><div class="line"><a name="l00018"></a><span class="lineno"><a class="line" href="classMagick_1_1MutexLock.html#a001b8241394f5467794621c3e8e3924f"> 18</a></span>&#160;<a class="code" href="classMagick_1_1MutexLock.html#a001b8241394f5467794621c3e8e3924f">Magick::MutexLock::MutexLock</a>(<span class="keywordtype">void</span>)</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="preprocessor">#if defined(MAGICKCORE_HAVE_PTHREAD)</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160; <span class="comment">// POSIX threads</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160; : _mutex()</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; ::pthread_mutexattr_t</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160; attr;</div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160; <span class="keywordtype">int</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; sysError;</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160; <span class="keywordflow">if</span> ((sysError=::pthread_mutexattr_init(&amp;attr)) == 0)</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; <span class="keywordflow">if</span> ((sysError=::pthread_mutex_init(&amp;_mutex,&amp;attr)) == 0)</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; {</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; ::pthread_mutexattr_destroy(&amp;attr);</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; <span class="keywordflow">return</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; <a class="code" href="namespaceMagick.html#acf038b43e710ea498bb5b9914e54ee3a">throwExceptionExplicit</a>(MagickCore::OptionError,<span class="stringliteral">&quot;mutex initialization failed&quot;</span>,</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; strerror(sysError));</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;<span class="preprocessor">#else</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;<span class="preprocessor">#if defined(_VISUALC_) &amp;&amp; defined(_MT)</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160;<span class="comment">// Win32 threads</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160;{</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; SECURITY_ATTRIBUTES</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; security;</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; <span class="comment">/* Allow the semaphore to be inherited */</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; security.nLength=<span class="keyword">sizeof</span>(security);</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; security.lpSecurityDescriptor=(LPVOID) NULL;</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; security.bInheritHandle=TRUE;</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <span class="comment">/* Create the semaphore, with initial value signaled */</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; _mutex=::CreateSemaphore(&amp;security,1,1,(LPCSTR) NULL);</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; <span class="keywordflow">if</span> (_mutex != (HANDLE) NULL)</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="keywordflow">return</span>;</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; <a class="code" href="namespaceMagick.html#acf038b43e710ea498bb5b9914e54ee3a">throwExceptionExplicit</a>(MagickCore::OptionError,</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; <span class="stringliteral">&quot;mutex initialization failed&quot;</span>);</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160;}</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;<span class="preprocessor">#else</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;<span class="comment">// Threads not supported</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160;{</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160;}</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160;<span class="comment">// Destructor</span></div><div class="line"><a name="l00065"></a><span class="lineno"><a class="line" href="classMagick_1_1MutexLock.html#a79e32170ed187f2b18363fae291ab3f0"> 65</a></span>&#160;<a class="code" href="classMagick_1_1MutexLock.html#a79e32170ed187f2b18363fae291ab3f0">Magick::MutexLock::~MutexLock</a>(<span class="keywordtype">void</span>)</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;{</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;<span class="preprocessor">#if defined(MAGICKCORE_HAVE_PTHREAD)</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; (void) ::pthread_mutex_destroy(&amp;_mutex);</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160;<span class="preprocessor">#if defined(_MT) &amp;&amp; defined(_VISUALC_)</span></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; (void) ::CloseHandle(_mutex);</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160;<span class="preprocessor">#endif</span></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="comment">// Lock mutex</span></div><div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="classMagick_1_1MutexLock.html#acc08e12d1710be392012a1d82e1ca3a2"> 76</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classMagick_1_1MutexLock.html#acc08e12d1710be392012a1d82e1ca3a2">Magick::MutexLock::lock</a>(<span class="keywordtype">void</span>)</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160;{</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160;<span class="preprocessor">#if defined(MAGICKCORE_HAVE_PTHREAD)</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <span class="keywordtype">int</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; sysError;</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; <span class="keywordflow">if</span> ((sysError=::pthread_mutex_lock(&amp;_mutex)) == 0)</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <span class="keywordflow">return</span>;</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <a class="code" href="namespaceMagick.html#acf038b43e710ea498bb5b9914e54ee3a">throwExceptionExplicit</a>(MagickCore::OptionError,<span class="stringliteral">&quot;mutex lock failed&quot;</span>,</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; strerror(sysError));</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160;<span class="preprocessor">#if defined(_MT) &amp;&amp; defined(_VISUALC_)</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; <span class="keywordflow">if</span> (WaitForSingleObject(_mutex,INFINITE) != WAIT_FAILED)</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; <span class="keywordflow">return</span>;</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; <a class="code" href="namespaceMagick.html#acf038b43e710ea498bb5b9914e54ee3a">throwExceptionExplicit</a>(MagickCore::OptionError,<span class="stringliteral">&quot;mutex lock failed&quot;</span>);</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160;}</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"> 94</span>&#160;<span class="comment">// Unlock mutex</span></div><div class="line"><a name="l00095"></a><span class="lineno"><a class="line" href="classMagick_1_1MutexLock.html#a456b4a2e852d7fdaf30a3a0fb088beca"> 95</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classMagick_1_1MutexLock.html#a456b4a2e852d7fdaf30a3a0fb088beca">Magick::MutexLock::unlock</a>(<span class="keywordtype">void</span>)</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160;{</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160;<span class="preprocessor">#if defined(MAGICKCORE_HAVE_PTHREAD)</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; <span class="keywordtype">int</span></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; sysError;</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160;</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; <span class="keywordflow">if</span> ((sysError=::pthread_mutex_unlock(&amp;_mutex)) == 0)</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; <span class="keywordflow">return</span>;</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; <a class="code" href="namespaceMagick.html#acf038b43e710ea498bb5b9914e54ee3a">throwExceptionExplicit</a>(MagickCore::OptionError,<span class="stringliteral">&quot;mutex unlock failed&quot;</span>,</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; strerror(sysError));</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160;<span class="preprocessor">#if defined(_MT) &amp;&amp; defined(_VISUALC_)</span></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; <span class="keywordflow">if</span> (ReleaseSemaphore(_mutex,1,(LPLONG) NULL) == TRUE)</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; <span class="keywordflow">return</span>;</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; <a class="code" href="namespaceMagick.html#acf038b43e710ea498bb5b9914e54ee3a">throwExceptionExplicit</a>(MagickCore::OptionError,<span class="stringliteral">&quot;mutex unlock failed&quot;</span>);</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160;}</div><div class="ttc" id="classMagick_1_1MutexLock_html_a79e32170ed187f2b18363fae291ab3f0"><div class="ttname"><a href="classMagick_1_1MutexLock.html#a79e32170ed187f2b18363fae291ab3f0">Magick::MutexLock::~MutexLock</a></div><div class="ttdeci">~MutexLock(void)</div><div class="ttdef"><b>Definition:</b> <a href="Thread_8cpp_source.html#l00065">Thread.cpp:65</a></div></div>
<div class="ttc" id="classMagick_1_1MutexLock_html_a456b4a2e852d7fdaf30a3a0fb088beca"><div class="ttname"><a href="classMagick_1_1MutexLock.html#a456b4a2e852d7fdaf30a3a0fb088beca">Magick::MutexLock::unlock</a></div><div class="ttdeci">void unlock(void)</div><div class="ttdef"><b>Definition:</b> <a href="Thread_8cpp_source.html#l00095">Thread.cpp:95</a></div></div>
<div class="ttc" id="classMagick_1_1MutexLock_html_acc08e12d1710be392012a1d82e1ca3a2"><div class="ttname"><a href="classMagick_1_1MutexLock.html#acc08e12d1710be392012a1d82e1ca3a2">Magick::MutexLock::lock</a></div><div class="ttdeci">void lock(void)</div><div class="ttdef"><b>Definition:</b> <a href="Thread_8cpp_source.html#l00076">Thread.cpp:76</a></div></div>
<div class="ttc" id="Thread_8h_html"><div class="ttname"><a href="Thread_8h.html">Thread.h</a></div></div>
<div class="ttc" id="namespaceMagick_html_acf038b43e710ea498bb5b9914e54ee3a"><div class="ttname"><a href="namespaceMagick.html#acf038b43e710ea498bb5b9914e54ee3a">Magick::throwExceptionExplicit</a></div><div class="ttdeci">MagickPPExport void throwExceptionExplicit(const MagickCore::ExceptionType severity_, const char *reason_, const char *description_=(char *) NULL)</div><div class="ttdef"><b>Definition:</b> <a href="Exception_8cpp_source.html#l00806">Exception.cpp:806</a></div></div>
<div class="ttc" id="classMagick_1_1MutexLock_html_a001b8241394f5467794621c3e8e3924f"><div class="ttname"><a href="classMagick_1_1MutexLock.html#a001b8241394f5467794621c3e8e3924f">Magick::MutexLock::MutexLock</a></div><div class="ttdeci">MutexLock(void)</div><div class="ttdef"><b>Definition:</b> <a href="Thread_8cpp_source.html#l00018">Thread.cpp:18</a></div></div>
<div class="ttc" id="Exception_8h_html"><div class="ttname"><a href="Exception_8h.html">Exception.h</a></div></div>
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