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<li class="navelem"><a class="el" href="dir_3c80010775d22af2067790ecc9cdcf9d.html">librf</a></li><li class="navelem"><a class="el" href="dir_54ae0e78d997f6903cdf0996223d047f.html">src</a></li> </ul>
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<div class="title">_awaker.h</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#pragma once</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>  </div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="preprocessor">#ifndef DOXYGEN_SKIP_PROPERTY</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>  </div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="keyword">namespace </span>resumef</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="keyword">namespace </span>detail</div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  {</div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>  <span class="keyword">template</span><<span class="keyword">class </span>_Ety, <span class="keyword">class</span>... _Types></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>  <span class="keyword">struct </span>_awaker</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="comment">//如果超时</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  <span class="comment">// e 始终为nullptr</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  <span class="comment">// 不关心返回值</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  <span class="comment">//如果不是超时，</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  <span class="comment">// e 指向当前触发的事件，用于实现wait_any</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  <span class="comment">// 返回true表示成功触发了事件，event内部减小一次事件计数，并删除此awaker</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  <span class="comment">// 返回false表示此事件已经无效，event内部只删除此awaker</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  <span class="keyword">typedef</span> std::function<bool(_Ety * e, _Types...)> callee_type;</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <span class="keyword">typedef</span> spinlock lock_type;</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="comment">//typedef std::recursive_mutex lock_type;</span></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="l00024"></a><span class="lineno"> 24</span>  lock_type _lock;</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  callee_type _callee;</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  std::atomic<intptr_t> _counter;</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  _awaker(callee_type && callee_, intptr_t init_count_ = 0)</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  : _callee(std::forward<callee_type>(callee_))</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  , _counter(init_count_)</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  {</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="l00033"></a><span class="lineno"> 33</span>  </div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="comment">//调用一次后，_callee就被置nullptr，下次再调用，必然返回false</span></div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="comment">//第一次调用，返回调用_callee的返回值</span></div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="comment">//超时通过传入nullptr来调用</span></div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordtype">bool</span> awake(_Ety * e, intptr_t count_, <span class="keyword">const</span> _Types&... args)</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  {</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  assert(count_ > 0);</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  scoped_lock<lock_type> lock_(this->_lock);</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="l00042"></a><span class="lineno"> 42</span>  <span class="keywordflow">if</span> ((this->_counter.fetch_sub(count_) - count_) <= 0)</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  {</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordflow">if</span> (this->_callee)</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  {</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  callee_type callee_ = std::move(this->_callee);</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordflow">return</span> callee_(e, args...);</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="l00049"></a><span class="lineno"> 49</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  }</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</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="l00053"></a><span class="lineno"> 53</span>  </div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  _awaker(<span class="keyword">const</span> _awaker &) = <span class="keyword">delete</span>;</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  _awaker(_awaker &&) = <span class="keyword">delete</span>;</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  _awaker & operator = (<span class="keyword">const</span> _awaker &) = <span class="keyword">delete</span>;</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  _awaker & operator = (_awaker &&) = <span class="keyword">delete</span>;</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  };</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  }</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="l00062"></a><span class="lineno"> 62</span>  </div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor">#endif //DOXYGEN_SKIP_PROPERTY</span></div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="preprocessor"> </span></div>
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