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<div class="title">switch_scheduler.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="keyword">namespace </span>resumef</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="l00008"></a><span class="lineno"><a class="line" href="structresumef_1_1switch__scheduler__awaitor.html"> 8</a></span>  <span class="keyword">struct </span><a class="code" href="structresumef_1_1switch__scheduler__awaitor.html">switch_scheduler_awaitor</a></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>  {</div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>  <span class="keyword">using</span> value_type = void;</div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>  <span class="keyword">using</span> <a class="code" href="structresumef_1_1state__t.html">state_type</a> = <a class="code" href="structresumef_1_1state__t.html">state_t<value_type></a>;</div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>  <span class="keyword">using</span> promise_type = promise_t<value_type>;</div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  <span class="keyword">using</span> lock_type = <span class="keyword">typename</span> <a class="code" href="structresumef_1_1spinlock.html">state_type::lock_type</a>;</div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  </div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  <a class="code" href="structresumef_1_1switch__scheduler__awaitor.html">switch_scheduler_awaitor</a>(<a class="code" href="structresumef_1_1scheduler__t.html">scheduler_t</a>* sch)</div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  :_scheduler(sch) {}</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  <a class="code" href="structresumef_1_1switch__scheduler__awaitor.html">switch_scheduler_awaitor</a>(<span class="keyword">const</span> <a class="code" href="structresumef_1_1switch__scheduler__awaitor.html">switch_scheduler_awaitor</a>&) = <span class="keywordflow">default</span>;</div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  <a class="code" href="structresumef_1_1switch__scheduler__awaitor.html">switch_scheduler_awaitor</a>(<a class="code" href="structresumef_1_1switch__scheduler__awaitor.html">switch_scheduler_awaitor</a>&&) = <span class="keywordflow">default</span>;</div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  </div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <a class="code" href="structresumef_1_1switch__scheduler__awaitor.html">switch_scheduler_awaitor</a>& operator = (<span class="keyword">const</span> <a class="code" href="structresumef_1_1switch__scheduler__awaitor.html">switch_scheduler_awaitor</a>&) = <span class="keywordflow">default</span>;</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <a class="code" href="structresumef_1_1switch__scheduler__awaitor.html">switch_scheduler_awaitor</a>& operator = (<a class="code" href="structresumef_1_1switch__scheduler__awaitor.html">switch_scheduler_awaitor</a>&&) = <span class="keywordflow">default</span>;</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  </div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  <span class="keywordtype">bool</span> await_ready() noexcept</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="l00025"></a><span class="lineno"> 25</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  }</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  </div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="keyword">template</span><<span class="keyword">class</span> _PromiseT, <span class="keyword">typename</span> = std::enable_if_t<traits::is_promise_v<_PromiseT>>></div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keywordtype">bool</span> await_suspend(coroutine_handle<_PromiseT> handler)</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  {</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  _PromiseT& promise = handler.promise();</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keyword">auto</span>* sptr = promise.get_state();</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keywordflow">if</span> (sptr->switch_scheduler_await_suspend(_scheduler))</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="l00035"></a><span class="lineno"> 35</span>  <a class="code" href="structresumef_1_1counted__ptr.html">counted_ptr<state_t<void></a>> _state = state_future_t::_Alloc_state<state_type>(<span class="keyword">true</span>);</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  _state->set_value();</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  _state->future_await_suspend(handler);</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>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</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>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</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="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="keywordtype">void</span> await_resume() noexcept</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>  }</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  </div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <a class="code" href="structresumef_1_1scheduler__t.html">scheduler_t</a>* _scheduler;</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#ifdef DOXYGEN_SKIP_PROPERTY</span></div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keyword">static</span> <a class="code" href="structresumef_1_1switch__scheduler__awaitor.html">switch_scheduler_awaitor</a> <a class="code" href="structresumef_1_1switch__scheduler__awaitor.html#ad895f4414bfb91fde51ac735420246a9">via</a>(<a class="code" href="structresumef_1_1scheduler__t.html">scheduler_t</a>& sch) noexcept;</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="l00072"></a><span class="lineno"> 72</span>  <span class="keyword">static</span> <a class="code" href="structresumef_1_1switch__scheduler__awaitor.html">switch_scheduler_awaitor</a> <a class="code" href="structresumef_1_1switch__scheduler__awaitor.html#ad895f4414bfb91fde51ac735420246a9">via</a>(<a class="code" href="structresumef_1_1scheduler__t.html">scheduler_t</a>* sch) noexcept;</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="preprocessor">#endif //DOXYGEN_SKIP_PROPERTY</span></div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  };</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="l00076"></a><span class="lineno"> 76</span>  <span class="comment">//由于跟when_all/when_any混用的时候，在clang上编译失败：</span></div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="comment">//clang把scheduler_t判断成一个is_awaitable，且放弃选择when_all/any(scheduler_t& sch, ...)版本</span></div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="comment">//故放弃这种用法</span></div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="comment">//inline switch_scheduler_awaitor operator co_await(scheduler_t& sch) noexcept</span></div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="comment">//{</span></div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="comment">// return { &sch };</span></div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="comment">//}</span></div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  </div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keyword">inline</span> <a class="code" href="structresumef_1_1switch__scheduler__awaitor.html">switch_scheduler_awaitor</a> via(<a class="code" href="structresumef_1_1scheduler__t.html">scheduler_t</a>& sch) noexcept</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="l00093"></a><span class="lineno"> 93</span>  <span class="keywordflow">return</span> { &sch };</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  }</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  </div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keyword">inline</span> switch_scheduler_awaitor via(scheduler_t* sch) noexcept</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  {</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">return</span> { sch };</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  }</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><!-- fragment --></div><!-- contents -->
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<div class="ttc" id="astructresumef_1_1scheduler__t_html"><div class="ttname"><a href="structresumef_1_1scheduler__t.html">resumef::scheduler_t</a></div><div class="ttdoc">协程调度器。</div><div class="ttdef"><b>Definition:</b> scheduler.h:10</div></div>
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<div class="ttc" id="astructresumef_1_1counted__ptr_html"><div class="ttname"><a href="structresumef_1_1counted__ptr.html">resumef::counted_ptr</a></div><div class="ttdoc">专用与state的智能计数指针，通过管理state内嵌的引用计数来管理state的生存期。</div><div class="ttdef"><b>Definition:</b> counted_ptr.h:9</div></div>
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<div class="ttc" id="astructresumef_1_1spinlock_html"><div class="ttname"><a href="structresumef_1_1spinlock.html">resumef::spinlock</a></div><div class="ttdoc">一个自旋锁实现。</div><div class="ttdef"><b>Definition:</b> spinlock.h:14</div></div>
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<div class="ttc" id="astructresumef_1_1switch__scheduler__awaitor_html_ad895f4414bfb91fde51ac735420246a9"><div class="ttname"><a href="structresumef_1_1switch__scheduler__awaitor.html#ad895f4414bfb91fde51ac735420246a9">resumef::switch_scheduler_awaitor::via</a></div><div class="ttdeci">static switch_scheduler_awaitor via(scheduler_t &sch) noexcept</div><div class="ttdoc">将本协程切换到指定调度器上运行。</div></div>
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<div class="ttc" id="astructresumef_1_1state__t_html"><div class="ttname"><a href="structresumef_1_1state__t.html">resumef::state_t</a></div><div class="ttdoc">专用于future_t<>的state类。</div><div class="ttdef"><b>Definition:</b> state.h:217</div></div>
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<div class="ttc" id="astructresumef_1_1switch__scheduler__awaitor_html"><div class="ttname"><a href="structresumef_1_1switch__scheduler__awaitor.html">resumef::switch_scheduler_awaitor</a></div><div class="ttdoc">切换协程的可等待对象。</div><div class="ttdef"><b>Definition:</b> switch_scheduler.h:8</div></div>
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