基于C++ Coroutines提案 ‘Stackless Resumable Functions’编写的协程库
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  67. <div class="title">def.h</div> </div>
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  69. <div class="contents">
  70. <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="preprocessor">#pragma once</span></div>
  71. <div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160; </div>
  72. <div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="preprocessor">#define LIB_RESUMEF_VERSION 20907 // 2.9.7</span></div>
  73. <div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160; </div>
  74. <div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="keyword">namespace </span>resumef</div>
  75. <div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;{</div>
  76. <div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="preprocessor">#ifndef DOXYGEN_SKIP_PROPERTY</span></div>
  77. <div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160; <span class="keyword">struct </span>scheduler_t;</div>
  78. <div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160; </div>
  79. <div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">class</span> _Ty = <span class="keywordtype">void</span>&gt;</div>
  80. <div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160; <span class="keyword">struct </span>[[nodiscard]] future_t;</div>
  81. <div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160; </div>
  82. <div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160; <span class="keyword">using</span> future_vt [[deprecated]] = future_t&lt;&gt;;</div>
  83. <div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160; </div>
  84. <div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> _Ty = std::<span class="keywordtype">nullptr</span>_t, <span class="keyword">typename</span> _Alloc = std::allocator&lt;<span class="keywordtype">char</span>&gt;&gt;</div>
  85. <div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160; <span class="keyword">struct </span>generator_t;</div>
  86. <div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160; </div>
  87. <div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">class</span> _Ty = <span class="keywordtype">void</span>&gt;</div>
  88. <div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160; <span class="keyword">struct </span>promise_t;</div>
  89. <div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160; </div>
  90. <div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">class</span> _Ty = <span class="keywordtype">void</span>&gt;</div>
  91. <div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160; <span class="keyword">struct </span>awaitable_t;</div>
  92. <div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160; </div>
  93. <div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160; <span class="keyword">struct </span>state_base_t;</div>
  94. <div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160; </div>
  95. <div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160; <span class="keyword">struct </span>switch_scheduler_t;</div>
  96. <div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="preprocessor">#endif //DOXYGEN_SKIP_PROPERTY</span></div>
  97. <div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; </div>
  98. <div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">typename</span> _PromiseT = <span class="keywordtype">void</span>&gt;</div>
  99. <div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; <span class="keyword">using</span> coroutine_handle = std::experimental::coroutine_handle&lt;_PromiseT&gt;;</div>
  100. <div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; <span class="keyword">using</span> suspend_always = std::experimental::suspend_always;</div>
  101. <div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; <span class="keyword">using</span> suspend_never = std::experimental::suspend_never;</div>
  102. <div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; </div>
  103. <div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">class</span>... _Mutexes&gt;</div>
  104. <div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; <span class="keyword">using</span> scoped_lock = std::scoped_lock&lt;_Mutexes...&gt;;</div>
  105. <div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; </div>
  106. <div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; constexpr <span class="keywordtype">size_t</span> _Version = LIB_RESUMEF_VERSION;</div>
  107. <div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; </div>
  108. <div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; scheduler_t* this_scheduler();</div>
  109. <div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; </div>
  110. <div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160;}</div>
  111. <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; </div>
  112. <div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;<span class="preprocessor">#ifndef DOXYGEN_SKIP_PROPERTY</span></div>
  113. <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; </div>
  114. <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160;<span class="preprocessor">#if RESUMEF_DEBUG_COUNTER</span></div>
  115. <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160;<span class="keyword">extern</span> std::mutex g_resumef_cout_mutex;</div>
  116. <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160;<span class="keyword">extern</span> std::atomic&lt;intptr_t&gt; g_resumef_state_count;</div>
  117. <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160;<span class="keyword">extern</span> std::atomic&lt;intptr_t&gt; g_resumef_task_count;</div>
  118. <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;<span class="keyword">extern</span> std::atomic&lt;intptr_t&gt; g_resumef_evtctx_count;</div>
  119. <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160;<span class="keyword">extern</span> std::atomic&lt;intptr_t&gt; g_resumef_state_id;</div>
  120. <div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;<span class="preprocessor">#endif</span></div>
  121. <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; </div>
  122. <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160;<span class="keyword">namespace </span>resumef</div>
  123. <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160;{</div>
  124. <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">class</span> T&gt;</div>
  125. <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="keyword">struct </span>remove_cvref</div>
  126. <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; {</div>
  127. <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="keyword">typedef</span> std::remove_cv_t&lt;std::remove_reference_t&lt;T&gt;&gt; type;</div>
  128. <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; };</div>
  129. <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">class</span> T&gt;</div>
  130. <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; <span class="keyword">using</span> remove_cvref_t = <span class="keyword">typename</span> remove_cvref&lt;T&gt;::type;</div>
  131. <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; </div>
  132. <div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; </div>
  133. <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">class</span> _Ty&gt;</div>
  134. <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; constexpr <span class="keywordtype">size_t</span> _Align_size()</div>
  135. <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; {</div>
  136. <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; <span class="keyword">const</span> <span class="keywordtype">size_t</span> _ALIGN_REQ = <span class="keyword">sizeof</span>(<span class="keywordtype">void</span>*) * 2;</div>
  137. <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; <span class="keywordflow">return</span> std::is_empty_v&lt;_Ty&gt; ? 0 :</div>
  138. <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; (<span class="keyword">sizeof</span>(_Ty) + _ALIGN_REQ - 1) &amp; ~(_ALIGN_REQ - 1);</div>
  139. <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; }</div>
  140. <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160;}</div>
  141. <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; </div>
  142. <div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160;<span class="preprocessor">#include &quot;exception.inl&quot;</span></div>
  143. <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; </div>
  144. <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;<span class="preprocessor">#endif //DOXYGEN_SKIP_PROPERTY</span></div>
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