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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">rf_task.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="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#ifndef DOXYGEN_SKIP_PROPERTY</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="l00017"></a><span class="lineno"> 17</span>  <span class="keyword">struct </span>task_t</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="l00019"></a><span class="lineno"> 19</span>  task_t();</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <span class="keyword">virtual</span> ~task_t();</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  </div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="keyword">protected</span>:</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  <span class="keyword">friend</span> scheduler_t;</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  counted_ptr<state_base_t> _state;</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  };</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#endif</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="comment">//----------------------------------------------------------------------------------------------</span></div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  </div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keyword">template</span><<span class="keyword">class</span> _Ty, <span class="keyword">class</span> = std::<span class="keywordtype">void</span>_t<>></div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keyword">struct </span>task_impl_t;</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> <span class="preprocessor">#ifndef DOXYGEN_SKIP_PROPERTY</span></div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keyword">template</span><<span class="keyword">class</span> _Ty></div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keyword">struct </span>task_impl_t<_Ty, std::void_t<traits::is_future<std::remove_reference_t<_Ty>>>> : <span class="keyword">public</span> task_t</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  {</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keyword">using</span> future_type = std::remove_reference_t<_Ty>;</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keyword">using</span> value_type = <span class="keyword">typename</span> future_type::value_type;</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keyword">using</span> state_type = state_t<value_type>;</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>  task_impl_t() = <span class="keywordflow">default</span>;</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  task_impl_t(future_type& f)</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>  initialize(f);</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>  <span class="keyword">protected</span>:</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordtype">void</span> initialize(future_type& f)</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>  _state = f._state.get();</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>  };</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>  <span class="keyword">template</span><<span class="keyword">class</span> _Ty></div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keyword">struct </span>task_impl_t<generator_t<_Ty>> : <span class="keyword">public</span> task_t</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  {</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keyword">using</span> value_type = _Ty;</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keyword">using</span> future_type = generator_t<value_type>;</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keyword">using</span> state_type = state_generator_t;</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>  task_impl_t() = <span class="keywordflow">default</span>;</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  task_impl_t(future_type& f)</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>  initialize(f);</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  }</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keyword">protected</span>:</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordtype">void</span> initialize(future_type& f)</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  {</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  _state = f.detach_state();</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>  };</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  </div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="comment">//----------------------------------------------------------------------------------------------</span></div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  </div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="comment">//ctx_task_t接受的是一个'函数对象'</span></div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="comment">//这个'函数对象'被调用后，返回generator<_Ty>/future_t<_Ty>类型</span></div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="comment">//然后'函数对象'作为异步执行的上下文状态保存起来</span></div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keyword">template</span><<span class="keyword">class</span> _Ctx></div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">struct </span>task_ctx_impl_t : <span class="keyword">public</span> task_impl_t<remove_cvref_t<decltype(std::declval<_Ctx>()())>></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>  <span class="keyword">using</span> context_type = _Ctx;</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>  context_type _context;</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="l00084"></a><span class="lineno"> 84</span>  task_ctx_impl_t(context_type ctx)</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  : _context(std::move(ctx))</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="l00087"></a><span class="lineno"> 87</span>  decltype(<span class="keyword">auto</span>) f = _context();</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  this->initialize(f);</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  }</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  };</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="preprocessor">#endif //DOXYGEN_SKIP_PROPERTY</span></div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> }</div>
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