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<div class="title">producer_consumer_queue.h</div> </div>
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<div class="contents">
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright 2014 Google Inc. All rights reserved.</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Use of this source code is governed by a BSD-style</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// license that can be found in the LICENSE file or at</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// https://developers.google.com/open-source/licenses/bsd</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> </div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#ifndef MEDIA_BASE_PRODUCER_CONSUMER_QUEUE_H_</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor"></span><span class="preprocessor">#define MEDIA_BASE_PRODUCER_CONSUMER_QUEUE_H_</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor"></span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include <deque></span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "packager/base/strings/stringprintf.h"</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "packager/base/synchronization/condition_variable.h"</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "packager/base/synchronization/lock.h"</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "packager/base/timer/elapsed_timer.h"</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include "packager/media/base/status.h"</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">namespace </span>edash_packager {</div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">namespace </span>media {</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">size_t</span> kUnlimitedCapacity = 0u;</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">static</span> <span class="keyword">const</span> int64_t kInfiniteTimeout = -1;</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">template</span> <<span class="keyword">class</span> T></div>
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<div class="line"><a name="l00028"></a><span class="lineno"><a class="line" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html"> 28</a></span> <span class="keyword">class </span><a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html">ProducerConsumerQueue</a> {</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keyword">explicit</span> <a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a7e0fa49f53accb47b4fbf15c9495d0d1">ProducerConsumerQueue</a>(<span class="keywordtype">size_t</span> capacity);</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a7e0fa49f53accb47b4fbf15c9495d0d1">ProducerConsumerQueue</a>(<span class="keywordtype">size_t</span> capacity, <span class="keywordtype">size_t</span> starting_pos);</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  ~<a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html">ProducerConsumerQueue</a>();</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <a class="code" href="../../d2/d90/classedash__packager_1_1media_1_1Status.html">Status</a> <a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a6a9fc5405d52cfd4178ee76c22dd7fb6">Push</a>(<span class="keyword">const</span> T& element, int64_t timeout_ms);</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <a class="code" href="../../d2/d90/classedash__packager_1_1media_1_1Status.html">Status</a> <a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a5e0c4b4fa932d5ad1154f8b263f76796">Pop</a>(T* element, int64_t timeout_ms);</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> </div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <a class="code" href="../../d2/d90/classedash__packager_1_1media_1_1Status.html">Status</a> <a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#acf87e686e78d6cb962f39bb2acca7180">Peek</a>(<span class="keywordtype">size_t</span> pos, T* element, int64_t timeout_ms);</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div>
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<div class="line"><a name="l00079"></a><span class="lineno"><a class="line" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a04f78e0c31398c66f19a24e6a563436b"> 79</a></span>  <span class="keywordtype">void</span> <a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a04f78e0c31398c66f19a24e6a563436b">Stop</a>() {</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  base::AutoLock l(lock_);</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  stop_requested_ = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  not_empty_cv_.Broadcast();</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  not_full_cv_.Broadcast();</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  new_element_cv_.Broadcast();</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  }</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div>
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<div class="line"><a name="l00088"></a><span class="lineno"><a class="line" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a43aa98358d9f8e0f416a6170ae3cb925"> 88</a></span>  <span class="keywordtype">bool</span> <a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a43aa98358d9f8e0f416a6170ae3cb925">Empty</a>()<span class="keyword"> const </span>{</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  base::AutoLock l(lock_);</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordflow">return</span> q_.empty();</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  }</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> </div>
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<div class="line"><a name="l00094"></a><span class="lineno"><a class="line" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#aa502e5cfc6159ded7abb3672cdab8cd5"> 94</a></span>  <span class="keywordtype">size_t</span> <a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#aa502e5cfc6159ded7abb3672cdab8cd5">Size</a>()<span class="keyword"> const </span>{</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  base::AutoLock l(lock_);</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordflow">return</span> q_.size();</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  }</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> </div>
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<div class="line"><a name="l00101"></a><span class="lineno"><a class="line" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a7af8ad77c837db03402ac0947cc73ebf"> 101</a></span>  <span class="keywordtype">size_t</span> <a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a7af8ad77c837db03402ac0947cc73ebf">HeadPos</a>()<span class="keyword"> const </span>{</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  base::AutoLock l(lock_);</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordflow">return</span> head_pos_;</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  }</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div>
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<div class="line"><a name="l00108"></a><span class="lineno"><a class="line" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a860bb54f9c53a25c27b1510b0e21eac9"> 108</a></span>  <span class="keywordtype">size_t</span> <a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a860bb54f9c53a25c27b1510b0e21eac9">TailPos</a>()<span class="keyword"> const </span>{</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  base::AutoLock l(lock_);</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">return</span> head_pos_ + q_.size() - 1;</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  }</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> </div>
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<div class="line"><a name="l00115"></a><span class="lineno"><a class="line" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#ad36a861f53f0b58d398a14ce2d93d793"> 115</a></span>  <span class="keywordtype">bool</span> <a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#ad36a861f53f0b58d398a14ce2d93d793">Stopped</a>()<span class="keyword"> const </span>{</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  base::AutoLock l(lock_);</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordflow">return</span> stop_requested_;</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  }</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> </div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="comment">// Move head_pos_ to center on pos.</span></div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordtype">void</span> SlideHeadOnCenter(<span class="keywordtype">size_t</span> pos);</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> </div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> capacity_; <span class="comment">// Maximum number of elements; zero means unlimited.</span></div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keyword">mutable</span> base::Lock lock_; <span class="comment">// Lock protecting all other variables below.</span></div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keywordtype">size_t</span> head_pos_; <span class="comment">// Head position.</span></div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  std::deque<T> q_; <span class="comment">// Internal queue holding the elements.</span></div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  base::ConditionVariable not_empty_cv_;</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  base::ConditionVariable not_full_cv_;</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  base::ConditionVariable new_element_cv_;</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordtype">bool</span> stop_requested_; <span class="comment">// True after Stop has been called.</span></div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> </div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  DISALLOW_COPY_AND_ASSIGN(<a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html">ProducerConsumerQueue</a>);</div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> };</div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> </div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment">// Implementations of non-inline functions.</span></div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="keyword">template</span> <<span class="keyword">class</span> T></div>
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<div class="line"><a name="l00138"></a><span class="lineno"><a class="line" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a7e0fa49f53accb47b4fbf15c9495d0d1"> 138</a></span> <a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a7e0fa49f53accb47b4fbf15c9495d0d1">ProducerConsumerQueue<T>::ProducerConsumerQueue</a>(<span class="keywordtype">size_t</span> capacity)</div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  : capacity_(capacity),</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  head_pos_(0),</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  not_empty_cv_(&lock_),</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  not_full_cv_(&lock_),</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  new_element_cv_(&lock_),</div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  stop_requested_(false) {}</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> <span class="keyword">template</span> <<span class="keyword">class</span> T></div>
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|
<div class="line"><a name="l00147"></a><span class="lineno"><a class="line" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#aabee571894649365e0982a410703a364"> 147</a></span> <a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a7e0fa49f53accb47b4fbf15c9495d0d1">ProducerConsumerQueue<T>::ProducerConsumerQueue</a>(<span class="keywordtype">size_t</span> capacity,</div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordtype">size_t</span> starting_pos)</div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  : capacity_(capacity),</div>
|
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  head_pos_(starting_pos),</div>
|
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  not_empty_cv_(&lock_),</div>
|
|
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  not_full_cv_(&lock_),</div>
|
|
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  new_element_cv_(&lock_),</div>
|
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  stop_requested_(false) {</div>
|
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span> }</div>
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<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> </div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="keyword">template</span> <<span class="keyword">class</span> T></div>
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<div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html">ProducerConsumerQueue<T>::~ProducerConsumerQueue</a>() {}</div>
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<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> </div>
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<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="keyword">template</span> <<span class="keyword">class</span> T></div>
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<div class="line"><a name="l00161"></a><span class="lineno"><a class="line" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a6a9fc5405d52cfd4178ee76c22dd7fb6"> 161</a></span> <a class="code" href="../../d2/d90/classedash__packager_1_1media_1_1Status.html">Status</a> <a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a6a9fc5405d52cfd4178ee76c22dd7fb6">ProducerConsumerQueue<T>::Push</a>(<span class="keyword">const</span> T& element, int64_t timeout_ms) {</div>
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<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  base::AutoLock l(lock_);</div>
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<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keywordtype">bool</span> woken = <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> </div>
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<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="comment">// Check for queue shutdown.</span></div>
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordflow">if</span> (stop_requested_)</div>
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<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d90/classedash__packager_1_1media_1_1Status.html">Status</a>(error::STOPPED, <span class="stringliteral">""</span>);</div>
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<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> </div>
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  base::ElapsedTimer timer;</div>
|
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  base::TimeDelta timeout_delta = base::TimeDelta::FromMilliseconds(timeout_ms);</div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> </div>
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<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keywordflow">if</span> (capacity_) {</div>
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<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">while</span> (q_.size() == capacity_) {</div>
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<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordflow">if</span> (timeout_ms < 0) {</div>
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|
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="comment">// Wait forever, or until Stop.</span></div>
|
|
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  not_full_cv_.Wait();</div>
|
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<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  base::TimeDelta elapsed = timer.Elapsed();</div>
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<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keywordflow">if</span> (elapsed < timeout_delta) {</div>
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|
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="comment">// Wait with timeout, or until Stop.</span></div>
|
|
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  not_full_cv_.TimedWait(timeout_delta - elapsed);</div>
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<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="comment">// We're through waiting.</span></div>
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<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d90/classedash__packager_1_1media_1_1Status.html">Status</a>(error::TIME_OUT, <span class="stringliteral">"Time out on pushing."</span>);</div>
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<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  }</div>
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<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  }</div>
|
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<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="comment">// Re-check for queue shutdown after waking from Wait.</span></div>
|
|
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keywordflow">if</span> (stop_requested_)</div>
|
|
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d90/classedash__packager_1_1media_1_1Status.html">Status</a>(error::STOPPED, <span class="stringliteral">""</span>);</div>
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<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> </div>
|
|
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  woken = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  }</div>
|
|
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  DCHECK_LT(q_.size(), capacity_);</div>
|
|
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  }</div>
|
|
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> </div>
|
|
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="comment">// Signal consumer to proceed if we are going to create some elements.</span></div>
|
|
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordflow">if</span> (q_.empty())</div>
|
|
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  not_empty_cv_.Signal();</div>
|
|
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  new_element_cv_.Signal();</div>
|
|
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> </div>
|
|
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  q_.push_back(element);</div>
|
|
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> </div>
|
|
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="comment">// Signal other producers if we just acquired more capacity.</span></div>
|
|
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keywordflow">if</span> (woken && q_.size() != capacity_)</div>
|
|
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  not_full_cv_.Signal();</div>
|
|
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="keywordflow">return</span> Status::OK;</div>
|
|
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span> }</div>
|
|
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span> </div>
|
|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span> <span class="keyword">template</span> <<span class="keyword">class</span> T></div>
|
|
<div class="line"><a name="l00210"></a><span class="lineno"><a class="line" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a5e0c4b4fa932d5ad1154f8b263f76796"> 210</a></span> <a class="code" href="../../d2/d90/classedash__packager_1_1media_1_1Status.html">Status</a> <a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a5e0c4b4fa932d5ad1154f8b263f76796">ProducerConsumerQueue<T>::Pop</a>(T* element, int64_t timeout_ms) {</div>
|
|
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  base::AutoLock l(lock_);</div>
|
|
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keywordtype">bool</span> woken = <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> </div>
|
|
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  base::ElapsedTimer timer;</div>
|
|
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  base::TimeDelta timeout_delta = base::TimeDelta::FromMilliseconds(timeout_ms);</div>
|
|
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span> </div>
|
|
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordflow">while</span> (q_.empty()) {</div>
|
|
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keywordflow">if</span> (stop_requested_)</div>
|
|
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d90/classedash__packager_1_1media_1_1Status.html">Status</a>(error::STOPPED, <span class="stringliteral">""</span>);</div>
|
|
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span> </div>
|
|
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordflow">if</span> (timeout_ms < 0) {</div>
|
|
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="comment">// Wait forever, or until Stop.</span></div>
|
|
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  not_empty_cv_.Wait();</div>
|
|
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  base::TimeDelta elapsed = timer.Elapsed();</div>
|
|
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordflow">if</span> (elapsed < timeout_delta) {</div>
|
|
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="comment">// Wait with timeout, or until Stop.</span></div>
|
|
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  not_empty_cv_.TimedWait(timeout_delta - elapsed);</div>
|
|
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="comment">// We're through waiting.</span></div>
|
|
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d90/classedash__packager_1_1media_1_1Status.html">Status</a>(error::TIME_OUT, <span class="stringliteral">"Time out on popping."</span>);</div>
|
|
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  }</div>
|
|
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  }</div>
|
|
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  woken = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  }</div>
|
|
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> </div>
|
|
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="comment">// Signal producer to proceed if we are going to create some capacity.</span></div>
|
|
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordflow">if</span> (q_.size() == capacity_)</div>
|
|
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  not_full_cv_.Signal();</div>
|
|
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> </div>
|
|
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  *element = q_.front();</div>
|
|
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  q_.pop_front();</div>
|
|
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  ++head_pos_;</div>
|
|
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span> </div>
|
|
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="comment">// Signal other consumers if we have more elements.</span></div>
|
|
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keywordflow">if</span> (woken && !q_.empty())</div>
|
|
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  not_empty_cv_.Signal();</div>
|
|
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <span class="keywordflow">return</span> Status::OK;</div>
|
|
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> }</div>
|
|
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> </div>
|
|
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> <span class="keyword">template</span> <<span class="keyword">class</span> T></div>
|
|
<div class="line"><a name="l00252"></a><span class="lineno"><a class="line" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#acf87e686e78d6cb962f39bb2acca7180"> 252</a></span> <a class="code" href="../../d2/d90/classedash__packager_1_1media_1_1Status.html">Status</a> <a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#acf87e686e78d6cb962f39bb2acca7180">ProducerConsumerQueue<T>::Peek</a>(<span class="keywordtype">size_t</span> pos,</div>
|
|
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  T* element,</div>
|
|
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  int64_t timeout_ms) {</div>
|
|
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  base::AutoLock l(lock_);</div>
|
|
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="keywordflow">if</span> (pos < head_pos_) {</div>
|
|
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d90/classedash__packager_1_1media_1_1Status.html">Status</a>(</div>
|
|
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  error::INVALID_ARGUMENT,</div>
|
|
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  base::StringPrintf(</div>
|
|
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="stringliteral">"pos (%zu) is too small; head is at %zu."</span>, pos, head_pos_));</div>
|
|
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  }</div>
|
|
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> </div>
|
|
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keywordtype">bool</span> woken = <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> </div>
|
|
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  base::ElapsedTimer timer;</div>
|
|
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  base::TimeDelta timeout_delta = base::TimeDelta::FromMilliseconds(timeout_ms);</div>
|
|
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> </div>
|
|
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="comment">// Move head to create some space (move the sliding window centered @ pos).</span></div>
|
|
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  SlideHeadOnCenter(pos);</div>
|
|
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span> </div>
|
|
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <span class="keywordflow">while</span> (pos >= head_pos_ + q_.size()) {</div>
|
|
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keywordflow">if</span> (stop_requested_)</div>
|
|
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d90/classedash__packager_1_1media_1_1Status.html">Status</a>(error::STOPPED, <span class="stringliteral">""</span>);</div>
|
|
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> </div>
|
|
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="keywordflow">if</span> (timeout_ms < 0) {</div>
|
|
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="comment">// Wait forever, or until Stop.</span></div>
|
|
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  new_element_cv_.Wait();</div>
|
|
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  base::TimeDelta elapsed = timer.Elapsed();</div>
|
|
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keywordflow">if</span> (elapsed < timeout_delta) {</div>
|
|
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="comment">// Wait with timeout, or until Stop.</span></div>
|
|
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  new_element_cv_.TimedWait(timeout_delta - elapsed);</div>
|
|
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="comment">// We're through waiting.</span></div>
|
|
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d90/classedash__packager_1_1media_1_1Status.html">Status</a>(error::TIME_OUT, <span class="stringliteral">"Time out on peeking."</span>);</div>
|
|
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  }</div>
|
|
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  }</div>
|
|
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="comment">// Move head to create some space (move the sliding window centered @ pos).</span></div>
|
|
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  SlideHeadOnCenter(pos);</div>
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<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  woken = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  }</div>
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<div class="line"><a name="l00292"></a><span class="lineno"> 292</span> </div>
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<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  *element = q_[pos - head_pos_];</div>
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<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> </div>
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<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="comment">// Signal other consumers if we have more elements.</span></div>
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<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keywordflow">if</span> (woken && !q_.empty())</div>
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<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  new_element_cv_.Signal();</div>
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<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="keywordflow">return</span> Status::OK;</div>
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<div class="line"><a name="l00299"></a><span class="lineno"> 299</span> }</div>
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<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> </div>
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<div class="line"><a name="l00301"></a><span class="lineno"> 301</span> <span class="keyword">template</span> <<span class="keyword">class</span> T></div>
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<div class="line"><a name="l00302"></a><span class="lineno"> 302</span> <span class="keywordtype">void</span> <a class="code" href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html">ProducerConsumerQueue<T>::SlideHeadOnCenter</a>(<span class="keywordtype">size_t</span> pos) {</div>
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<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  lock_.AssertAcquired();</div>
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<div class="line"><a name="l00304"></a><span class="lineno"> 304</span> </div>
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<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keywordflow">if</span> (capacity_) {</div>
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<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="comment">// Signal producer to proceed if we are going to create some capacity.</span></div>
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<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="keywordflow">if</span> (q_.size() == capacity_ && pos > head_pos_ + capacity_ / 2)</div>
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<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  not_full_cv_.Signal();</div>
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<div class="line"><a name="l00309"></a><span class="lineno"> 309</span> </div>
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<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordflow">while</span> (!q_.empty() && pos > head_pos_ + capacity_ / 2) {</div>
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<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  ++head_pos_;</div>
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<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  q_.pop_front();</div>
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<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  }</div>
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<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  }</div>
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<div class="line"><a name="l00315"></a><span class="lineno"> 315</span> }</div>
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<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> </div>
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<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> } <span class="comment">// namespace media</span></div>
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<div class="line"><a name="l00318"></a><span class="lineno"> 318</span> } <span class="comment">// namespace edash_packager</span></div>
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<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> </div>
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<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> <span class="preprocessor">#endif // MEDIA_BASE_PRODUCER_CONSUMER_QUEUE_H_</span></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1ProducerConsumerQueue_html_a04f78e0c31398c66f19a24e6a563436b"><div class="ttname"><a href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a04f78e0c31398c66f19a24e6a563436b">edash_packager::media::ProducerConsumerQueue::Stop</a></div><div class="ttdeci">void Stop()</div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d15/producer__consumer__queue_8h_source.html#l00079">producer_consumer_queue.h:79</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1Status_html"><div class="ttname"><a href="../../d2/d90/classedash__packager_1_1media_1_1Status.html">edash_packager::media::Status</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d1/d13/status_8h_source.html#l00075">status.h:75</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1ProducerConsumerQueue_html_a860bb54f9c53a25c27b1510b0e21eac9"><div class="ttname"><a href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a860bb54f9c53a25c27b1510b0e21eac9">edash_packager::media::ProducerConsumerQueue::TailPos</a></div><div class="ttdeci">size_t TailPos() const </div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d15/producer__consumer__queue_8h_source.html#l00108">producer_consumer_queue.h:108</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1ProducerConsumerQueue_html_a7e0fa49f53accb47b4fbf15c9495d0d1"><div class="ttname"><a href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a7e0fa49f53accb47b4fbf15c9495d0d1">edash_packager::media::ProducerConsumerQueue::ProducerConsumerQueue</a></div><div class="ttdeci">ProducerConsumerQueue(size_t capacity)</div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d15/producer__consumer__queue_8h_source.html#l00138">producer_consumer_queue.h:138</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1ProducerConsumerQueue_html_a6a9fc5405d52cfd4178ee76c22dd7fb6"><div class="ttname"><a href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a6a9fc5405d52cfd4178ee76c22dd7fb6">edash_packager::media::ProducerConsumerQueue::Push</a></div><div class="ttdeci">Status Push(const T &element, int64_t timeout_ms)</div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d15/producer__consumer__queue_8h_source.html#l00161">producer_consumer_queue.h:161</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1ProducerConsumerQueue_html_a43aa98358d9f8e0f416a6170ae3cb925"><div class="ttname"><a href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a43aa98358d9f8e0f416a6170ae3cb925">edash_packager::media::ProducerConsumerQueue::Empty</a></div><div class="ttdeci">bool Empty() const </div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d15/producer__consumer__queue_8h_source.html#l00088">producer_consumer_queue.h:88</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1ProducerConsumerQueue_html_a5e0c4b4fa932d5ad1154f8b263f76796"><div class="ttname"><a href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a5e0c4b4fa932d5ad1154f8b263f76796">edash_packager::media::ProducerConsumerQueue::Pop</a></div><div class="ttdeci">Status Pop(T *element, int64_t timeout_ms)</div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d15/producer__consumer__queue_8h_source.html#l00210">producer_consumer_queue.h:210</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1ProducerConsumerQueue_html_acf87e686e78d6cb962f39bb2acca7180"><div class="ttname"><a href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#acf87e686e78d6cb962f39bb2acca7180">edash_packager::media::ProducerConsumerQueue::Peek</a></div><div class="ttdeci">Status Peek(size_t pos, T *element, int64_t timeout_ms)</div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d15/producer__consumer__queue_8h_source.html#l00252">producer_consumer_queue.h:252</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1ProducerConsumerQueue_html_aa502e5cfc6159ded7abb3672cdab8cd5"><div class="ttname"><a href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#aa502e5cfc6159ded7abb3672cdab8cd5">edash_packager::media::ProducerConsumerQueue::Size</a></div><div class="ttdeci">size_t Size() const </div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d15/producer__consumer__queue_8h_source.html#l00094">producer_consumer_queue.h:94</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1ProducerConsumerQueue_html"><div class="ttname"><a href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html">edash_packager::media::ProducerConsumerQueue</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d15/producer__consumer__queue_8h_source.html#l00028">producer_consumer_queue.h:28</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1ProducerConsumerQueue_html_a7af8ad77c837db03402ac0947cc73ebf"><div class="ttname"><a href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#a7af8ad77c837db03402ac0947cc73ebf">edash_packager::media::ProducerConsumerQueue::HeadPos</a></div><div class="ttdeci">size_t HeadPos() const </div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d15/producer__consumer__queue_8h_source.html#l00101">producer_consumer_queue.h:101</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1ProducerConsumerQueue_html_ad36a861f53f0b58d398a14ce2d93d793"><div class="ttname"><a href="../../d5/d02/classedash__packager_1_1media_1_1ProducerConsumerQueue.html#ad36a861f53f0b58d398a14ce2d93d793">edash_packager::media::ProducerConsumerQueue::Stopped</a></div><div class="ttdeci">bool Stopped() const </div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d15/producer__consumer__queue_8h_source.html#l00115">producer_consumer_queue.h:115</a></div></div>
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