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<li class="navelem"><a class="el" href="../../dir_39dc0668bd5a501998f94e8b4e546c71.html">media</a></li><li class="navelem"><a class="el" href="../../dir_279fd47bebb21302c25cfb685e84c359.html">file</a></li> </ul>
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<div class="title">io_cache.h</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright 2015 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 PACKAGER_FILE_IO_CACHE_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 PACKAGER_FILE_IO_CACHE_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 <stdint.h></span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include <vector></span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "packager/base/macros.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/lock.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/waitable_event.h"</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="keyword">namespace </span>edash_packager {</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="keyword">namespace </span>media {</div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div>
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<div class="line"><a name="l00020"></a><span class="lineno"><a class="line" href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html"> 20</a></span> <span class="keyword">class </span><a class="code" href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html">IoCache</a> {</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="keyword">explicit</span> <a class="code" href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html">IoCache</a>(uint64_t cache_size);</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  ~<a class="code" href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html">IoCache</a>();</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  uint64_t <a class="code" href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#a462bd5ddce8041eaa109271fd0d155a9">Read</a>(<span class="keywordtype">void</span>* buffer, uint64_t size);</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  uint64_t <a class="code" href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#a4b7ee97ec07a6b2702ae4b58c9df4413">Write</a>(<span class="keyword">const</span> <span class="keywordtype">void</span>* buffer, uint64_t size);</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordtype">void</span> <a class="code" href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#ae8ed4943296a88e5d5356347e63c6a42">Clear</a>();</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordtype">void</span> <a class="code" href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#a4588dbf505a08da8423b525ce24fee92">Close</a>();</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div>
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<div class="line"><a name="l00050"></a><span class="lineno"><a class="line" href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#a742807639a2983fc05cf058a88bfbe79"> 50</a></span>  <span class="keywordtype">bool</span> <a class="code" href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#a742807639a2983fc05cf058a88bfbe79">closed</a>() { <span class="keywordflow">return</span> closed_; }</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordtype">void</span> <a class="code" href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#a60aed7e0d5b1bf784cbc32bb75e1fb5b">Reopen</a>();</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  uint64_t <a class="code" href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#a0fe59125434e46c2ea5474cfc9f0e95c">BytesCached</a>();</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  uint64_t <a class="code" href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#ab5f7b9c5bc61e33f91cef7726f222586">BytesFree</a>();</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordtype">void</span> <a class="code" href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#ace4946f4ecb34f84c4750d276404a3e5">WaitUntilEmptyOrClosed</a>();</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  uint64_t BytesCachedInternal();</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  uint64_t BytesFreeInternal();</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keyword">const</span> uint64_t cache_size_;</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  base::Lock lock_;</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  base::WaitableEvent read_event_;</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  base::WaitableEvent write_event_;</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  std::vector<uint8_t> circular_buffer_;</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keyword">const</span> uint8_t* end_ptr_;</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  uint8_t* r_ptr_;</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  uint8_t* w_ptr_;</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keywordtype">bool</span> closed_;</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  DISALLOW_COPY_AND_ASSIGN(<a class="code" href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html">IoCache</a>);</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> };</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> } <span class="comment">// namespace media</span></div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> } <span class="comment">// namespace edash_packager</span></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> <span class="preprocessor">#endif // PACKAGER_FILE_IO_CACHE_H</span></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1IoCache_html_a0fe59125434e46c2ea5474cfc9f0e95c"><div class="ttname"><a href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#a0fe59125434e46c2ea5474cfc9f0e95c">edash_packager::media::IoCache::BytesCached</a></div><div class="ttdeci">uint64_t BytesCached()</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d37/io__cache_8cc_source.html#l00125">io_cache.cc:125</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1IoCache_html_a60aed7e0d5b1bf784cbc32bb75e1fb5b"><div class="ttname"><a href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#a60aed7e0d5b1bf784cbc32bb75e1fb5b">edash_packager::media::IoCache::Reopen</a></div><div class="ttdeci">void Reopen()</div><div class="ttdoc">Reopens the cache. Any data still in the cache will be lost. </div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d37/io__cache_8cc_source.html#l00116">io_cache.cc:116</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1IoCache_html_a742807639a2983fc05cf058a88bfbe79"><div class="ttname"><a href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#a742807639a2983fc05cf058a88bfbe79">edash_packager::media::IoCache::closed</a></div><div class="ttdeci">bool closed()</div><div class="ttdef"><b>Definition:</b> <a href="../../d3/d19/io__cache_8h_source.html#l00050">io_cache.h:50</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1IoCache_html"><div class="ttname"><a href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html">edash_packager::media::IoCache</a></div><div class="ttdoc">Declaration of class which implements a thread-safe circular buffer. </div><div class="ttdef"><b>Definition:</b> <a href="../../d3/d19/io__cache_8h_source.html#l00020">io_cache.h:20</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1IoCache_html_a4588dbf505a08da8423b525ce24fee92"><div class="ttname"><a href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#a4588dbf505a08da8423b525ce24fee92">edash_packager::media::IoCache::Close</a></div><div class="ttdeci">void Close()</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d37/io__cache_8cc_source.html#l00109">io_cache.cc:109</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1IoCache_html_ace4946f4ecb34f84c4750d276404a3e5"><div class="ttname"><a href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#ace4946f4ecb34f84c4750d276404a3e5">edash_packager::media::IoCache::WaitUntilEmptyOrClosed</a></div><div class="ttdeci">void WaitUntilEmptyOrClosed()</div><div class="ttdoc">Waits until the cache is empty or has been closed. </div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d37/io__cache_8cc_source.html#l00145">io_cache.cc:145</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1IoCache_html_a4b7ee97ec07a6b2702ae4b58c9df4413"><div class="ttname"><a href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#a4b7ee97ec07a6b2702ae4b58c9df4413">edash_packager::media::IoCache::Write</a></div><div class="ttdeci">uint64_t Write(const void *buffer, uint64_t size)</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d37/io__cache_8cc_source.html#l00066">io_cache.cc:66</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1IoCache_html_ab5f7b9c5bc61e33f91cef7726f222586"><div class="ttname"><a href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#ab5f7b9c5bc61e33f91cef7726f222586">edash_packager::media::IoCache::BytesFree</a></div><div class="ttdeci">uint64_t BytesFree()</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d37/io__cache_8cc_source.html#l00130">io_cache.cc:130</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1IoCache_html_ae8ed4943296a88e5d5356347e63c6a42"><div class="ttname"><a href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#ae8ed4943296a88e5d5356347e63c6a42">edash_packager::media::IoCache::Clear</a></div><div class="ttdeci">void Clear()</div><div class="ttdoc">Empties the cache. </div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d37/io__cache_8cc_source.html#l00102">io_cache.cc:102</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1IoCache_html_a462bd5ddce8041eaa109271fd0d155a9"><div class="ttname"><a href="../../d3/d6b/classedash__packager_1_1media_1_1IoCache.html#a462bd5ddce8041eaa109271fd0d155a9">edash_packager::media::IoCache::Read</a></div><div class="ttdeci">uint64_t Read(void *buffer, uint64_t size)</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d37/io__cache_8cc_source.html#l00038">io_cache.cc:38</a></div></div>
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