1<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2<html xmlns="http://www.w3.org/1999/xhtml"> 3<head> 4<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> 5<meta http-equiv="X-UA-Compatible" content="IE=9"/> 6<meta name="generator" content="Doxygen 1.8.14"/> 7<meta name="viewport" content="width=device-width, initial-scale=1"/> 8<title>Magick++: Thread.cpp Source File</title> 9<link href="tabs.css" rel="stylesheet" type="text/css"/> 10<script type="text/javascript" src="jquery.js"></script> 11<script type="text/javascript" src="dynsections.js"></script> 12<link href="navtree.css" rel="stylesheet" type="text/css"/> 13<script type="text/javascript" src="resize.js"></script> 14<script type="text/javascript" src="navtreedata.js"></script> 15<script type="text/javascript" src="navtree.js"></script> 16<script type="text/javascript"> 17/* @license 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type="text/javascript"> 51/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ 52$(document).ready(function(){initNavTree('Thread_8cpp_source.html','');}); 53/* @license-end */ 54</script> 55<div id="doc-content"> 56<div class="header"> 57 <div class="headertitle"> 58<div class="title">Thread.cpp</div> </div> 59</div><!--header--> 60<div class="contents"> 61<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> <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> <span class="comment">//</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Copyright Bob Friesenhahn, 1999, 2000, 2001, 2002</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// Copyright Dirk Lemstra 2014-2017</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">//</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// Implementation of thread support</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">//</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> </div><div class="line"><a name="l00009"></a><span class="lineno"><a class="line" href="Thread_8cpp.html#a24d8db5449916b4dd0283f5f30a5edc7"> 9</a></span> <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> <span class="preprocessor">#define MAGICK_PLUSPLUS_IMPLEMENTATION 1</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "<a class="code" href="Thread_8h.html">Magick++/Thread.h</a>"</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "<a class="code" href="Exception_8h.html">Magick++/Exception.h</a>"</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include <string.h></span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <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> <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> <span class="preprocessor">#if defined(MAGICKCORE_HAVE_PTHREAD)</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <span class="comment">// POSIX threads</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  : _mutex()</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> {</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  ::pthread_mutexattr_t</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  attr;</div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keywordtype">int</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  sysError;</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keywordflow">if</span> ((sysError=::pthread_mutexattr_init(&attr)) == 0)</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keywordflow">if</span> ((sysError=::pthread_mutex_init(&_mutex,&attr)) == 0)</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  {</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  ::pthread_mutexattr_destroy(&attr);</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  }</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <a class="code" href="namespaceMagick.html#acf038b43e710ea498bb5b9914e54ee3a">throwExceptionExplicit</a>(MagickCore::OptionError,<span class="stringliteral">"mutex initialization failed"</span>,</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  strerror(sysError));</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> }</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#if defined(_VISUALC_) && defined(_MT)</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment">// Win32 threads</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> {</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  SECURITY_ATTRIBUTES</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  security;</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>  <span class="comment">/* Allow the semaphore to be inherited */</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  security.nLength=<span class="keyword">sizeof</span>(security);</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  security.lpSecurityDescriptor=(LPVOID) NULL;</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  security.bInheritHandle=TRUE;</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="comment">/* Create the semaphore, with initial value signaled */</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  _mutex=::CreateSemaphore(&security,1,1,(LPCSTR) NULL);</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordflow">if</span> (_mutex != (HANDLE) NULL)</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <a class="code" href="namespaceMagick.html#acf038b43e710ea498bb5b9914e54ee3a">throwExceptionExplicit</a>(MagickCore::OptionError,</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="stringliteral">"mutex initialization failed"</span>);</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> }</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment">// Threads not supported</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> {</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="preprocessor">#endif</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="preprocessor">#endif</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"> 64</span> <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> <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> {</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="preprocessor">#if defined(MAGICKCORE_HAVE_PTHREAD)</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  (void) ::pthread_mutex_destroy(&_mutex);</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor">#if defined(_MT) && defined(_VISUALC_)</span></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  (void) ::CloseHandle(_mutex);</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> }</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> <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> <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> {</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor">#if defined(MAGICKCORE_HAVE_PTHREAD)</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordtype">int</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  sysError;</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">if</span> ((sysError=::pthread_mutex_lock(&_mutex)) == 0)</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <a class="code" href="namespaceMagick.html#acf038b43e710ea498bb5b9914e54ee3a">throwExceptionExplicit</a>(MagickCore::OptionError,<span class="stringliteral">"mutex lock failed"</span>,</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  strerror(sysError));</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="preprocessor">#if defined(_MT) && defined(_VISUALC_)</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">if</span> (WaitForSingleObject(_mutex,INFINITE) != WAIT_FAILED)</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <a class="code" href="namespaceMagick.html#acf038b43e710ea498bb5b9914e54ee3a">throwExceptionExplicit</a>(MagickCore::OptionError,<span class="stringliteral">"mutex lock failed"</span>);</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> }</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> </div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <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> <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> {</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="preprocessor">#if defined(MAGICKCORE_HAVE_PTHREAD)</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordtype">int</span></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  sysError;</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> </div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">if</span> ((sysError=::pthread_mutex_unlock(&_mutex)) == 0)</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <a class="code" href="namespaceMagick.html#acf038b43e710ea498bb5b9914e54ee3a">throwExceptionExplicit</a>(MagickCore::OptionError,<span class="stringliteral">"mutex unlock failed"</span>,</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  strerror(sysError));</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="preprocessor">#if defined(_MT) && defined(_VISUALC_)</span></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">if</span> (ReleaseSemaphore(_mutex,1,(LPLONG) NULL) == TRUE)</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <a class="code" href="namespaceMagick.html#acf038b43e710ea498bb5b9914e54ee3a">throwExceptionExplicit</a>(MagickCore::OptionError,<span class="stringliteral">"mutex unlock failed"</span>);</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> }</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> 62<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> 63<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> 64<div class="ttc" id="Thread_8h_html"><div class="ttname"><a href="Thread_8h.html">Thread.h</a></div></div> 65<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> 66<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> 67<div class="ttc" id="Exception_8h_html"><div class="ttname"><a href="Exception_8h.html">Exception.h</a></div></div> 68</div><!-- fragment --></div><!-- contents --> 69</div><!-- doc-content --> 70<!-- start footer part --> 71<div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> 72 <ul> 73 <li class="navelem"><a class="el" href="https://imagemagick.org/api/Magick++/dir_43e0a1f539e00dcfa1a6bc4d4fee4fc2.html">home</a></li><li class="navelem"><a class="el" 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