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<a href="hook_8c.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">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * hook.c</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Copyright 2011 John Lindgren</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"> * Redistribution and use in source and binary forms, with or without</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * modification, are permitted provided that the following conditions are met:</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> <span class="comment"> * 1. Redistributions of source code must retain the above copyright notice,</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * this list of conditions, and the following disclaimer.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright notice,</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * this list of conditions, and the following disclaimer in the documentation</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * provided with the distribution.</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * This software is provided "as is" and without any warranty, express or</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * implied. In no event shall the authors be liable for any damages arising from</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * the use of this software.</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> */</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 <glib.h></span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <pthread.h></span></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> <span class="preprocessor">#include "config.h"</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include "<a class="code" href="core_8h.html">core.h</a>"</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include "<a class="code" href="hook_8h.html">hook.h</a>"</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div>
<div class="line"><a name="l00027"></a><span class="lineno"><a class="code" href="structHookItem.html"> 27</a></span> <span class="keyword">typedef</span> <span class="keyword">struct </span>{</div>
<div class="line"><a name="l00028"></a><span class="lineno"><a class="code" href="structHookItem.html#aaec474eec436e34a701e036d8da2fba6"> 28</a></span>  <a class="code" href="hook_8h.html#a751c8ef35ff18234fce3577d7c2c5e8b">HookFunction</a> <a class="code" href="structHookItem.html#aaec474eec436e34a701e036d8da2fba6">func</a>;</div>
<div class="line"><a name="l00029"></a><span class="lineno"><a class="code" href="structHookItem.html#a25ebd4d80a4cf497c39562452a11eb35"> 29</a></span>  <span class="keywordtype">void</span> * <a class="code" href="structHookItem.html#a25ebd4d80a4cf497c39562452a11eb35">user</a>;</div>
<div class="line"><a name="l00030"></a><span class="lineno"><a class="code" href="structHookItem.html#a21aa84a689978a32ad34685ecf01843e"> 30</a></span>  <span class="keywordtype">int</span> <a class="code" href="structHookItem.html#a21aa84a689978a32ad34685ecf01843e">lock_count</a>;</div>
<div class="line"><a name="l00031"></a><span class="lineno"><a class="code" href="structHookItem.html#ab7e299b19f9c32b7197989dbb0062f23"> 31</a></span>  <a class="code" href="playlist-api_8h.html#a9c0371229a271517ff8b2eb9901063eb">bool_t</a> <a class="code" href="structHookItem.html#ab7e299b19f9c32b7197989dbb0062f23">remove_flag</a>;</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> } <a class="code" href="structHookItem.html">HookItem</a>;</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div>
<div class="line"><a name="l00034"></a><span class="lineno"><a class="code" href="hook_8c.html#a4acff8232e4aec9cd5c6dc200ac55ef3"> 34</a></span> <span class="keyword">static</span> pthread_mutex_t <a class="code" href="hook_8c.html#a4acff8232e4aec9cd5c6dc200ac55ef3">mutex</a> = PTHREAD_MUTEX_INITIALIZER;</div>
<div class="line"><a name="l00035"></a><span class="lineno"><a class="code" href="hook_8c.html#ae7b6a2926d213693229ac24a6dcc5871"> 35</a></span> <span class="keyword">static</span> GHashTable * <a class="code" href="hook_8c.html#ae7b6a2926d213693229ac24a6dcc5871">hooks</a>; <span class="comment">/* of (GQueue of (HookItem *) *) */</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment">/* str_unref() may be a macro */</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"><a class="code" href="hook_8c.html#a57f78ea61bd674bc0195f152d51ebc13"> 38</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="hook_8c.html#a57f78ea61bd674bc0195f152d51ebc13">str_unref_cb</a> (<span class="keywordtype">void</span> * str)</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> {</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <a class="code" href="core_8h.html#a11c8163bb888bbbc5919a1b83a5f56e4">str_unref</a> (str);</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> </div>
<div class="line"><a name="l00043"></a><span class="lineno"><a class="code" href="hook_8h.html#ab22a6e8a91087917b253e0b978164a4d"> 43</a></span> EXPORT <span class="keywordtype">void</span> <a class="code" href="hook_8c.html#aa22a1a3441cacb3cdc23a90585f6c0da">hook_associate</a> (<span class="keyword">const</span> <span class="keywordtype">char</span> * <a class="code" href="plugin-init_8c.html#a8f8f80d37794cde9472343e4487ba3eb">name</a>, <a class="code" href="hook_8h.html#a751c8ef35ff18234fce3577d7c2c5e8b">HookFunction</a> <a class="code" href="plugins-api_8h.html#a140f43dbe38431fed1594811b2ae7544">func</a>, <span class="keywordtype">void</span> * user)</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>  pthread_mutex_lock (& <a class="code" href="hook_8c.html#a4acff8232e4aec9cd5c6dc200ac55ef3">mutex</a>);</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordflow">if</span> (! <a class="code" href="hook_8c.html#ae7b6a2926d213693229ac24a6dcc5871">hooks</a>)</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <a class="code" href="hook_8c.html#ae7b6a2926d213693229ac24a6dcc5871">hooks</a> = g_hash_table_new_full (g_str_hash, g_str_equal, <a class="code" href="hook_8c.html#a57f78ea61bd674bc0195f152d51ebc13">str_unref_cb</a>,</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  (GDestroyNotify) g_queue_free);</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  GQueue * list = g_hash_table_lookup (<a class="code" href="hook_8c.html#ae7b6a2926d213693229ac24a6dcc5871">hooks</a>, name);</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>  <span class="keywordflow">if</span> (! list)</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  g_hash_table_insert (<a class="code" href="hook_8c.html#ae7b6a2926d213693229ac24a6dcc5871">hooks</a>, <a class="code" href="core_8h.html#a4c9271c59af4564d3991b838674528dc">str_get</a> (name), list = g_queue_new ());</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <a class="code" href="structHookItem.html">HookItem</a> * item = g_slice_new (<a class="code" href="structHookItem.html">HookItem</a>);</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  item-><a class="code" href="structHookItem.html#aaec474eec436e34a701e036d8da2fba6">func</a> = <a class="code" href="plugins-api_8h.html#a140f43dbe38431fed1594811b2ae7544">func</a>;</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  item-><a class="code" href="structHookItem.html#a25ebd4d80a4cf497c39562452a11eb35">user</a> = user;</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  item-><a class="code" href="structHookItem.html#a21aa84a689978a32ad34685ecf01843e">lock_count</a> = 0;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  item-><a class="code" href="structHookItem.html#ab7e299b19f9c32b7197989dbb0062f23">remove_flag</a> = <a class="code" href="core_8h.html#aa93f0eb578d23995850d61f7d61c55c1">FALSE</a>;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> </div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  g_queue_push_tail (list, item);</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>  pthread_mutex_unlock (& <a class="code" href="hook_8c.html#a4acff8232e4aec9cd5c6dc200ac55ef3">mutex</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> </div>
<div class="line"><a name="l00067"></a><span class="lineno"><a class="code" href="hook_8h.html#ab1a554ed6894d4823eddc9efb6c20648"> 67</a></span> EXPORT <span class="keywordtype">void</span> <a class="code" href="hook_8c.html#ac725944bfd2685ba82f8176b42d53219">hook_dissociate_full</a> (<span class="keyword">const</span> <span class="keywordtype">char</span> * <a class="code" href="plugin-init_8c.html#a8f8f80d37794cde9472343e4487ba3eb">name</a>, <a class="code" href="hook_8h.html#a751c8ef35ff18234fce3577d7c2c5e8b">HookFunction</a> <a class="code" href="plugins-api_8h.html#a140f43dbe38431fed1594811b2ae7544">func</a>, <span class="keywordtype">void</span> * user)</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>  pthread_mutex_lock (& <a class="code" href="hook_8c.html#a4acff8232e4aec9cd5c6dc200ac55ef3">mutex</a>);</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">if</span> (! <a class="code" href="hook_8c.html#ae7b6a2926d213693229ac24a6dcc5871">hooks</a>)</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">goto</span> DONE;</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>  GQueue * list = g_hash_table_lookup (<a class="code" href="hook_8c.html#ae7b6a2926d213693229ac24a6dcc5871">hooks</a>, name);</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>  <span class="keywordflow">if</span> (! list)</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">goto</span> DONE;</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">for</span> (GList * node = list->head; node;)</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>  <a class="code" href="structHookItem.html">HookItem</a> * item = node->data;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  GList * next = node->next;</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> (item-><a class="code" href="structHookItem.html#aaec474eec436e34a701e036d8da2fba6">func</a> == func && (! user || item-><a class="code" href="structHookItem.html#a25ebd4d80a4cf497c39562452a11eb35">user</a> == user))</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  {</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordflow">if</span> (item-><a class="code" href="structHookItem.html#a21aa84a689978a32ad34685ecf01843e">lock_count</a>)</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  item-><a class="code" href="structHookItem.html#ab7e299b19f9c32b7197989dbb0062f23">remove_flag</a> = <a class="code" href="core_8h.html#aa8cecfc5c5c054d2875c03e77b7be15d">TRUE</a>;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  {</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  g_queue_delete_link (list, node);</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  g_slice_free (<a class="code" href="structHookItem.html">HookItem</a>, item);</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> </div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  node = next;</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> </div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordflow">if</span> (! list->head)</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  g_hash_table_remove (<a class="code" href="hook_8c.html#ae7b6a2926d213693229ac24a6dcc5871">hooks</a>, name);</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> DONE:</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  pthread_mutex_unlock (& <a class="code" href="hook_8c.html#a4acff8232e4aec9cd5c6dc200ac55ef3">mutex</a>);</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"><a class="code" href="hook_8h.html#ab44604108a536f02eabbd18fd58cd4eb"> 105</a></span> EXPORT <span class="keywordtype">void</span> <a class="code" href="hook_8c.html#a921722578f3d6b91f84eb3002e64da74">hook_call</a> (<span class="keyword">const</span> <span class="keywordtype">char</span> * <a class="code" href="plugin-init_8c.html#a8f8f80d37794cde9472343e4487ba3eb">name</a>, <span class="keywordtype">void</span> * data)</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> {</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  pthread_mutex_lock (& <a class="code" href="hook_8c.html#a4acff8232e4aec9cd5c6dc200ac55ef3">mutex</a>);</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordflow">if</span> (! <a class="code" href="hook_8c.html#ae7b6a2926d213693229ac24a6dcc5871">hooks</a>)</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">goto</span> DONE;</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> </div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  GQueue * list = g_hash_table_lookup (<a class="code" href="hook_8c.html#ae7b6a2926d213693229ac24a6dcc5871">hooks</a>, name);</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordflow">if</span> (! list)</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordflow">goto</span> DONE;</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordflow">for</span> (GList * node = list->head; node;)</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  {</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <a class="code" href="structHookItem.html">HookItem</a> * item = node->data;</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> </div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordflow">if</span> (! item-><a class="code" href="structHookItem.html#ab7e299b19f9c32b7197989dbb0062f23">remove_flag</a>)</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  {</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  item-><a class="code" href="structHookItem.html#a21aa84a689978a32ad34685ecf01843e">lock_count</a> ++;</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  pthread_mutex_unlock (& <a class="code" href="hook_8c.html#a4acff8232e4aec9cd5c6dc200ac55ef3">mutex</a>);</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> </div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  item-><a class="code" href="structHookItem.html#aaec474eec436e34a701e036d8da2fba6">func</a> (data, item-><a class="code" href="structHookItem.html#a25ebd4d80a4cf497c39562452a11eb35">user</a>);</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  pthread_mutex_lock (& <a class="code" href="hook_8c.html#a4acff8232e4aec9cd5c6dc200ac55ef3">mutex</a>);</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  item-><a class="code" href="structHookItem.html#a21aa84a689978a32ad34685ecf01843e">lock_count</a> --;</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  }</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> </div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  GList * next = node->next;</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> </div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordflow">if</span> (item-><a class="code" href="structHookItem.html#ab7e299b19f9c32b7197989dbb0062f23">remove_flag</a> && ! item-><a class="code" href="structHookItem.html#a21aa84a689978a32ad34685ecf01843e">lock_count</a>)</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  {</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  g_queue_delete_link (list, node);</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  g_slice_free (<a class="code" href="structHookItem.html">HookItem</a>, item);</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  }</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> </div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  node = next;</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  }</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">if</span> (! list->head)</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  g_hash_table_remove (<a class="code" href="hook_8c.html#ae7b6a2926d213693229ac24a6dcc5871">hooks</a>, name);</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> DONE:</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  pthread_mutex_unlock (& <a class="code" href="hook_8c.html#a4acff8232e4aec9cd5c6dc200ac55ef3">mutex</a>);</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> }</div>
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