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<div class="title">AsyncQueue.h</div> </div>
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<a href="AsyncQueue_8h.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"> * GStreamer</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Copyright (C) 2009 Andrey Nechypurenko <andreynech@gmail.com></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"> * This library is free software; you can redistribute it and/or</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * modify it under the terms of the GNU Library General Public</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * License as published by the Free Software Foundation; either</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * version 2 of the License, or (at your option) any later version.</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * This library is distributed in the hope that it will be useful,</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * Library General Public License for more details.</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"> * You should have received a copy of the GNU Library General Public</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * License along with this library; if not, write to the</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330,</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * Boston, MA 02111-1307, USA.</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#ifndef __ASYNCQUEUE_H</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#define __ASYNCQUEUE_H</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <QMutex></span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <QWaitCondition></span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <QList></span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">template</span><<span class="keyword">class</span> T></div>
<div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="classAsyncQueue.html"> 38</a></span> <span class="keyword">class </span><a class="code" href="classAsyncQueue.html">AsyncQueue</a></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> <span class="keyword">public</span>:</div>
<div class="line"><a name="l00041"></a><span class="lineno"><a class="line" href="classAsyncQueue.html#a506bb977a36f08ef87408e642c0e2cbe"> 41</a></span>  <a class="code" href="classAsyncQueue.html#a506bb977a36f08ef87408e642c0e2cbe">AsyncQueue</a>() : <a class="code" href="classAsyncQueue.html#a780fb6a0344976afd5049f48d8a9ce85">waitingReaders</a>(0) {}</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="line" href="classAsyncQueue.html#ab0dbba10de7e9dbfd5ede7d2ce7d2ea1"> 43</a></span>  <span class="keywordtype">int</span> <a class="code" href="classAsyncQueue.html#ab0dbba10de7e9dbfd5ede7d2ce7d2ea1">size</a>()</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>  QMutexLocker locker(&<a class="code" href="classAsyncQueue.html#a02fbd712aaf263029ba4f713f1efacdd">mutex</a>);</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordflow">return</span> this-><a class="code" href="classAsyncQueue.html#a6ec97f69b3efe52d7e653a495ecbd033">buffer</a>.size();</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> </div>
<div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="classAsyncQueue.html#a827bee07c12df4ad095e311d355974c6"> 53</a></span>  <span class="keywordtype">void</span> <a class="code" href="classAsyncQueue.html#a827bee07c12df4ad095e311d355974c6">put</a>(<span class="keyword">const</span> T& item)</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>  QMutexLocker locker(&<a class="code" href="classAsyncQueue.html#a02fbd712aaf263029ba4f713f1efacdd">mutex</a>);</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  this-><a class="code" href="classAsyncQueue.html#a6ec97f69b3efe52d7e653a495ecbd033">buffer</a>.push_back(item);</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordflow">if</span>(this-><a class="code" href="classAsyncQueue.html#a780fb6a0344976afd5049f48d8a9ce85">waitingReaders</a>)</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  this-><a class="code" href="classAsyncQueue.html#a564daa7b18fb15c0d7e5f05a20a63f10">bufferIsNotEmpty</a>.wakeOne();</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"><a class="line" href="classAsyncQueue.html#aa937f605cb142f165dd43317625e7ac7"> 61</a></span>  T <span class="keyword">get</span>()</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>  QMutexLocker locker(&<a class="code" href="classAsyncQueue.html#a02fbd712aaf263029ba4f713f1efacdd">mutex</a>);</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">while</span>(this-><a class="code" href="classAsyncQueue.html#a6ec97f69b3efe52d7e653a495ecbd033">buffer</a>.size() == 0)</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>  ++(this-><a class="code" href="classAsyncQueue.html#a780fb6a0344976afd5049f48d8a9ce85">waitingReaders</a>);</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  this-><a class="code" href="classAsyncQueue.html#a564daa7b18fb15c0d7e5f05a20a63f10">bufferIsNotEmpty</a>.wait(&<a class="code" href="classAsyncQueue.html#a02fbd712aaf263029ba4f713f1efacdd">mutex</a>);</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  --(this-><a class="code" href="classAsyncQueue.html#a780fb6a0344976afd5049f48d8a9ce85">waitingReaders</a>);</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>  T item = this-><a class="code" href="classAsyncQueue.html#a6ec97f69b3efe52d7e653a495ecbd033">buffer</a>.front();</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  this-><a class="code" href="classAsyncQueue.html#a6ec97f69b3efe52d7e653a495ecbd033">buffer</a>.pop_front();</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">return</span> item;</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="keyword">private</span>:</div>
<div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="classAsyncQueue.html#a48e07f44c694b078ea8e64795720590d"> 76</a></span>  <span class="keyword">typedef</span> QList<T> <a class="code" href="classAsyncQueue.html#a48e07f44c694b078ea8e64795720590d">Container</a>;</div>
<div class="line"><a name="l00077"></a><span class="lineno"><a class="line" href="classAsyncQueue.html#a02fbd712aaf263029ba4f713f1efacdd"> 77</a></span>  QMutex <a class="code" href="classAsyncQueue.html#a02fbd712aaf263029ba4f713f1efacdd">mutex</a>;</div>
<div class="line"><a name="l00078"></a><span class="lineno"><a class="line" href="classAsyncQueue.html#a564daa7b18fb15c0d7e5f05a20a63f10"> 78</a></span>  QWaitCondition <a class="code" href="classAsyncQueue.html#a564daa7b18fb15c0d7e5f05a20a63f10">bufferIsNotEmpty</a>;</div>
<div class="line"><a name="l00079"></a><span class="lineno"><a class="line" href="classAsyncQueue.html#a6ec97f69b3efe52d7e653a495ecbd033"> 79</a></span>  Container <a class="code" href="classAsyncQueue.html#a6ec97f69b3efe52d7e653a495ecbd033">buffer</a>;</div>
<div class="line"><a name="l00080"></a><span class="lineno"><a class="line" href="classAsyncQueue.html#a780fb6a0344976afd5049f48d8a9ce85"> 80</a></span>  <span class="keywordtype">short</span> <a class="code" href="classAsyncQueue.html#a780fb6a0344976afd5049f48d8a9ce85">waitingReaders</a>;</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> </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="preprocessor">#endif // __ASYNCQUEUE_H</span></div>
<div class="ttc" id="classAsyncQueue_html_ab0dbba10de7e9dbfd5ede7d2ce7d2ea1"><div class="ttname"><a href="classAsyncQueue.html#ab0dbba10de7e9dbfd5ede7d2ce7d2ea1">AsyncQueue::size</a></div><div class="ttdeci">int size()</div><div class="ttdef"><b>Definition:</b> <a href="AsyncQueue_8h_source.html#l00043">AsyncQueue.h:43</a></div></div>
<div class="ttc" id="classAsyncQueue_html_a6ec97f69b3efe52d7e653a495ecbd033"><div class="ttname"><a href="classAsyncQueue.html#a6ec97f69b3efe52d7e653a495ecbd033">AsyncQueue::buffer</a></div><div class="ttdeci">Container buffer</div><div class="ttdef"><b>Definition:</b> <a href="AsyncQueue_8h_source.html#l00079">AsyncQueue.h:79</a></div></div>
<div class="ttc" id="classAsyncQueue_html_a564daa7b18fb15c0d7e5f05a20a63f10"><div class="ttname"><a href="classAsyncQueue.html#a564daa7b18fb15c0d7e5f05a20a63f10">AsyncQueue::bufferIsNotEmpty</a></div><div class="ttdeci">QWaitCondition bufferIsNotEmpty</div><div class="ttdef"><b>Definition:</b> <a href="AsyncQueue_8h_source.html#l00078">AsyncQueue.h:78</a></div></div>
<div class="ttc" id="classAsyncQueue_html_a780fb6a0344976afd5049f48d8a9ce85"><div class="ttname"><a href="classAsyncQueue.html#a780fb6a0344976afd5049f48d8a9ce85">AsyncQueue::waitingReaders</a></div><div class="ttdeci">short waitingReaders</div><div class="ttdef"><b>Definition:</b> <a href="AsyncQueue_8h_source.html#l00080">AsyncQueue.h:80</a></div></div>
<div class="ttc" id="classAsyncQueue_html_a02fbd712aaf263029ba4f713f1efacdd"><div class="ttname"><a href="classAsyncQueue.html#a02fbd712aaf263029ba4f713f1efacdd">AsyncQueue::mutex</a></div><div class="ttdeci">QMutex mutex</div><div class="ttdef"><b>Definition:</b> <a href="AsyncQueue_8h_source.html#l00077">AsyncQueue.h:77</a></div></div>
<div class="ttc" id="classAsyncQueue_html_a506bb977a36f08ef87408e642c0e2cbe"><div class="ttname"><a href="classAsyncQueue.html#a506bb977a36f08ef87408e642c0e2cbe">AsyncQueue::AsyncQueue</a></div><div class="ttdeci">AsyncQueue()</div><div class="ttdef"><b>Definition:</b> <a href="AsyncQueue_8h_source.html#l00041">AsyncQueue.h:41</a></div></div>
<div class="ttc" id="classAsyncQueue_html_a48e07f44c694b078ea8e64795720590d"><div class="ttname"><a href="classAsyncQueue.html#a48e07f44c694b078ea8e64795720590d">AsyncQueue::Container</a></div><div class="ttdeci">QList< T > Container</div><div class="ttdef"><b>Definition:</b> <a href="AsyncQueue_8h_source.html#l00076">AsyncQueue.h:76</a></div></div>
<div class="ttc" id="classAsyncQueue_html"><div class="ttname"><a href="classAsyncQueue.html">AsyncQueue</a></div><div class="ttdoc">This is the thread safe implementation of the Queue. </div><div class="ttdef"><b>Definition:</b> <a href="AsyncQueue_8h_source.html#l00038">AsyncQueue.h:38</a></div></div>
<div class="ttc" id="classAsyncQueue_html_a827bee07c12df4ad095e311d355974c6"><div class="ttname"><a href="classAsyncQueue.html#a827bee07c12df4ad095e311d355974c6">AsyncQueue::put</a></div><div class="ttdeci">void put(const T &item)</div><div class="ttdoc">Appends an element to the queue. </div><div class="ttdef"><b>Definition:</b> <a href="AsyncQueue_8h_source.html#l00053">AsyncQueue.h:53</a></div></div>
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