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- <div class="title">channel_v1.h</div> </div>
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- <div class="contents">
- <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#pragma once</span></div>
- <div class="line"><a name="l00002"></a><span class="lineno"> 2</span>  </div>
- <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="keyword">namespace </span>resumef</div>
- <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> {</div>
- <div class="line"><a name="l00005"></a><span class="lineno"> 5</span>  <span class="keyword">namespace </span>detail</div>
- <div class="line"><a name="l00006"></a><span class="lineno"> 6</span>  {</div>
- <div class="line"><a name="l00007"></a><span class="lineno"> 7</span>  <span class="keyword">template</span><<span class="keyword">class</span> _Ty></div>
- <div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  <span class="keyword">struct </span>channel_impl : <span class="keyword">public</span> std::enable_shared_from_this<channel_impl<_Ty>></div>
- <div class="line"><a name="l00009"></a><span class="lineno"> 9</span>  {</div>
- <div class="line"><a name="l00010"></a><span class="lineno"> 10</span>  <span class="keyword">typedef</span> _awaker<channel_impl<_Ty>, _Ty*, error_code> channel_read_awaker;</div>
- <div class="line"><a name="l00011"></a><span class="lineno"> 11</span>  <span class="keyword">typedef</span> std::shared_ptr<channel_read_awaker> channel_read_awaker_ptr;</div>
- <div class="line"><a name="l00012"></a><span class="lineno"> 12</span>  </div>
- <div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  <span class="keyword">typedef</span> _awaker<channel_impl<_Ty>> channel_write_awaker;</div>
- <div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  <span class="keyword">typedef</span> std::shared_ptr<channel_write_awaker> channel_write_awaker_ptr;</div>
- <div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  <span class="keyword">typedef</span> std::pair<channel_write_awaker_ptr, _Ty> write_tuple_type;</div>
- <div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  <span class="keyword">private</span>:</div>
- <div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  <span class="comment">//typedef spinlock lock_type;</span></div>
- <div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  <span class="keyword">typedef</span> std::recursive_mutex lock_type;</div>
- <div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  </div>
- <div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  lock_type _lock; <span class="comment">//保证访问本对象是线程安全的</span></div>
- <div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> _max_counter; <span class="comment">//数据队列的容量上限</span></div>
- <div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  std::deque<_Ty> _values; <span class="comment">//数据队列</span></div>
- <div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  std::list<channel_read_awaker_ptr> _read_awakes; <span class="comment">//读队列</span></div>
- <div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  std::list<write_tuple_type> _write_awakes; <span class="comment">//写队列</span></div>
- <div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  <span class="keyword">public</span>:</div>
- <div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  channel_impl(<span class="keywordtype">size_t</span> max_counter_)</div>
- <div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  :_max_counter(max_counter_)</div>
- <div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  {</div>
- <div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  }</div>
- <div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  </div>
- <div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#if _DEBUG</span></div>
- <div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keyword">const</span> std::deque<_Ty>& debug_queue()<span class="keyword"> const</span></div>
- <div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="keyword"> </span>{</div>
- <div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keywordflow">return</span> _values;</div>
- <div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  }</div>
- <div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#endif</span></div>
- <div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  </div>
- <div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keyword">template</span><<span class="keyword">class</span> callee_t, <span class="keyword">class</span> = std::enable_if<!std::is_same<std::remove_cv_t<callee_t>, channel_read_awaker_ptr>::value>></div>
- <div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  decltype(<span class="keyword">auto</span>) read(callee_t&& awaker)</div>
- <div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  {</div>
- <div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordflow">return</span> read_(std::make_shared<channel_read_awaker>(std::forward<callee_t>(awaker)));</div>
- <div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  }</div>
- <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keyword">template</span><<span class="keyword">class</span> callee_t, <span class="keyword">class</span> _Ty2, <span class="keyword">class</span> = std::enable_if<!std::is_same<std::remove_cv_t<callee_t>, channel_write_awaker_ptr>::value>></div>
- <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  decltype(<span class="keyword">auto</span>) write(callee_t&& awaker, _Ty2&& val)</div>
- <div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  {</div>
- <div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordflow">return</span> write_(std::make_shared<channel_write_awaker>(std::forward<callee_t>(awaker)), std::forward<_Ty2>(val));</div>
- <div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  }</div>
- <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  </div>
- <div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="comment">//如果已经触发了awaker,则返回true</span></div>
- <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="comment">//设计目标是线程安全的，实际情况待考察</span></div>
- <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordtype">bool</span> read_(channel_read_awaker_ptr&& r_awaker)</div>
- <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  {</div>
- <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  assert(r_awaker);</div>
- <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  </div>
- <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  scoped_lock<lock_type> lock_(this->_lock);</div>
- <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  </div>
- <div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordtype">bool</span> ret_value;</div>
- <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordflow">if</span> (_values.size() > 0)</div>
- <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  {</div>
- <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="comment">//如果数据队列有数据，则可以直接读数据</span></div>
- <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keyword">auto</span> val = std::move(_values.front());</div>
- <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  _values.pop_front();</div>
- <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  </div>
- <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  r_awaker->awake(<span class="keyword">this</span>, 1, &val, error_code::none);</div>
- <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  ret_value = <span class="keyword">true</span>;</div>
- <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  }</div>
- <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">else</span></div>
- <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  {</div>
- <div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="comment">//否则，将“读等待”放入“读队列”</span></div>
- <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  _read_awakes.push_back(r_awaker);</div>
- <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  ret_value = <span class="keyword">false</span>;</div>
- <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  }</div>
- <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  </div>
- <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="comment">//如果已有写队列，则唤醒一个“写等待”</span></div>
- <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  awake_one_writer_();</div>
- <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  </div>
- <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">return</span> ret_value;</div>
- <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  }</div>
- <div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  </div>
- <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="comment">//设计目标是线程安全的，实际情况待考察</span></div>
- <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">template</span><<span class="keyword">class</span> _Ty2></div>
- <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordtype">void</span> write_(channel_write_awaker_ptr&& w_awaker, _Ty2&& val)</div>
- <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  {</div>
- <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  assert(w_awaker);</div>
- <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  scoped_lock<lock_type> lock_(this->_lock);</div>
- <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  </div>
- <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="comment">//如果满了，则不添加到数据队列，而是将“写等待”和值，放入“写队列”</span></div>
- <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordtype">bool</span> is_full = _values.size() >= _max_counter;</div>
- <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">if</span> (is_full)</div>
- <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  _write_awakes.push_back(std::make_pair(std::forward<channel_write_awaker_ptr>(w_awaker), std::forward<_Ty2>(val)));</div>
- <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordflow">else</span></div>
- <div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  _values.push_back(std::forward<_Ty2>(val));</div>
- <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  </div>
- <div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="comment">//如果已有读队列，则唤醒一个“读等待”</span></div>
- <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  awake_one_reader_();</div>
- <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  </div>
- <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="comment">//触发 没有放入“写队列”的“写等待”</span></div>
- <div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordflow">if</span> (!is_full) w_awaker->awake(<span class="keyword">this</span>, 1);</div>
- <div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  }</div>
- <div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  </div>
- <div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keyword">private</span>:</div>
- <div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="comment">//只能被write_函数调用，内部不再需要加锁</span></div>
- <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordtype">void</span> awake_one_reader_()</div>
- <div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  {</div>
- <div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="comment">//assert(!(_read_awakes.size() >= 0 && _values.size() == 0));</span></div>
- <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  </div>
- <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> iter = _read_awakes.begin(); iter != _read_awakes.end(); )</div>
- <div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  {</div>
- <div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keyword">auto</span> r_awaker = *iter;</div>
- <div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  iter = _read_awakes.erase(iter);</div>
- <div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  </div>
- <div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">if</span> (r_awaker->awake(<span class="keyword">this</span>, 1, _values.size() ? &_values.front() : <span class="keyword">nullptr</span>, error_code::read_before_write))</div>
- <div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  {</div>
- <div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordflow">if</span> (_values.size()) _values.pop_front();</div>
- <div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  </div>
- <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="comment">//唤醒一个“读等待”后，尝试唤醒一个“写等待”，以处理“数据队列”满后的“写等待”</span></div>
- <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  awake_one_writer_();</div>
- <div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordflow">break</span>;</div>
- <div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  }</div>
- <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  }</div>
- <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  }</div>
- <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  </div>
- <div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="comment">//只能被read_函数调用，内部不再需要加锁</span></div>
- <div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordtype">void</span> awake_one_writer_()</div>
- <div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  {</div>
- <div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> iter = _write_awakes.begin(); iter != _write_awakes.end(); )</div>
- <div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  {</div>
- <div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keyword">auto</span> w_awaker = std::move(*iter);</div>
- <div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  iter = _write_awakes.erase(iter);</div>
- <div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  </div>
- <div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">if</span> (w_awaker.first->awake(<span class="keyword">this</span>, 1))</div>
- <div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  {</div>
- <div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="comment">//一个“写等待”唤醒后，将“写等待”绑定的值，放入“数据队列”</span></div>
- <div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  _values.push_back(std::move(w_awaker.second));</div>
- <div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordflow">break</span>;</div>
- <div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  }</div>
- <div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  }</div>
- <div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  }</div>
- <div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  </div>
- <div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keywordtype">size_t</span> capacity() const noexcept</div>
- <div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  {</div>
- <div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keywordflow">return</span> _max_counter;</div>
- <div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  }</div>
- <div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  </div>
- <div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  channel_impl(<span class="keyword">const</span> channel_impl&) = <span class="keyword">delete</span>;</div>
- <div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  channel_impl(channel_impl&&) = <span class="keyword">delete</span>;</div>
- <div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  channel_impl& operator = (<span class="keyword">const</span> channel_impl&) = <span class="keyword">delete</span>;</div>
- <div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  channel_impl& operator = (channel_impl&&) = <span class="keyword">delete</span>;</div>
- <div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  };</div>
- <div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  } <span class="comment">//namespace detail</span></div>
- <div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  </div>
- <div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="keyword">namespace </span>channel_v1</div>
- <div class="line"><a name="l00153"></a><span class="lineno"> 153</span> {</div>
- <div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  </div>
- <div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keyword">template</span><<span class="keyword">class</span> _Ty></div>
- <div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keyword">struct </span>channel_t</div>
- <div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  {</div>
- <div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keyword">typedef</span> detail::channel_impl<_Ty> channel_impl_type;</div>
- <div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> channel_impl_type::channel_read_awaker channel_read_awaker;</div>
- <div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> channel_impl_type::channel_write_awaker channel_write_awaker;</div>
- <div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  </div>
- <div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keyword">typedef</span> std::shared_ptr<channel_impl_type> channel_impl_ptr;</div>
- <div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keyword">typedef</span> std::weak_ptr<channel_impl_type> channel_impl_wptr;</div>
- <div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keyword">typedef</span> std::chrono::system_clock clock_type;</div>
- <div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keyword">private</span>:</div>
- <div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  channel_impl_ptr _chan;</div>
- <div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keyword">public</span>:</div>
- <div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  channel_t(<span class="keywordtype">size_t</span> max_counter = 0)</div>
- <div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  :_chan(std::make_shared<channel_impl_type>(max_counter))</div>
- <div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  {</div>
- <div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  </div>
- <div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  }</div>
- <div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  </div>
- <div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keyword">template</span><<span class="keyword">class</span> _Ty2></div>
- <div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  future_t<bool> write(_Ty2&& val)<span class="keyword"> const</span></div>
- <div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="keyword"> </span>{</div>
- <div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  awaitable_t<bool> awaitable;</div>
- <div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  </div>
- <div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keyword">auto</span> awaker = std::make_shared<channel_write_awaker>(</div>
- <div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  [st = awaitable._state](channel_impl_type* chan) -> <span class="keywordtype">bool</span></div>
- <div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  {</div>
- <div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  st->set_value(chan ? true : false);</div>
- <div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  return true;</div>
- <div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  });</div>
- <div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  _chan->write_(std::move(awaker), std::forward<_Ty2>(val));</div>
- <div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  </div>
- <div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordflow">return</span> awaitable.get_future();</div>
- <div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  }</div>
- <div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  </div>
- <div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  future_t<_Ty> read()<span class="keyword"> const</span></div>
- <div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="keyword"> </span>{</div>
- <div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  awaitable_t<_Ty> awaitable;</div>
- <div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  </div>
- <div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keyword">auto</span> awaker = std::make_shared<channel_read_awaker>(</div>
- <div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  [st = awaitable._state](channel_impl_type*, _Ty* val, error_code fe) -> <span class="keywordtype">bool</span></div>
- <div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  {</div>
- <div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  if (val)</div>
- <div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  st->set_value(std::move(*val));</div>
- <div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  else</div>
- <div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  st->throw_exception(channel_exception{ fe });</div>
- <div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  </div>
- <div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
- <div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  });</div>
- <div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  _chan->read_(std::move(awaker));</div>
- <div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  </div>
- <div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="keywordflow">return</span> awaitable.get_future();</div>
- <div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  }</div>
- <div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  </div>
- <div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keyword">template</span><<span class="keyword">class</span> _Ty2></div>
- <div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  future_t<bool> operator << (_Ty2&& val)<span class="keyword"> const</span></div>
- <div class="line"><a name="l00211"></a><span class="lineno"> 211</span> <span class="keyword"> </span>{</div>
- <div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keywordflow">return</span> std::move(write(std::forward<_Ty2>(val)));</div>
- <div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  }</div>
- <div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  </div>
- <div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  future_t<_Ty> <span class="keyword">operator</span> co_await ()<span class="keyword"> const</span></div>
- <div class="line"><a name="l00216"></a><span class="lineno"> 216</span> <span class="keyword"> </span>{</div>
- <div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordflow">return</span> read();</div>
- <div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  }</div>
- <div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  </div>
- <div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="preprocessor">#if _DEBUG</span></div>
- <div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="comment">//非线程安全，返回的队列也不是线程安全的</span></div>
- <div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keyword">const</span> <span class="keyword">auto</span>& debug_queue()<span class="keyword"> const</span></div>
- <div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="keyword"> </span>{</div>
- <div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keywordflow">return</span> _chan->debug_queue();</div>
- <div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  }</div>
- <div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="preprocessor">#endif</span></div>
- <div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  </div>
- <div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keywordtype">size_t</span> capacity() const noexcept</div>
- <div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  {</div>
- <div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keywordflow">return</span> _chan->capacity();</div>
- <div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  }</div>
- <div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  </div>
- <div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  channel_t(<span class="keyword">const</span> channel_t&) = <span class="keywordflow">default</span>;</div>
- <div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  channel_t(channel_t&&) = <span class="keywordflow">default</span>;</div>
- <div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  channel_t& operator = (<span class="keyword">const</span> channel_t&) = <span class="keywordflow">default</span>;</div>
- <div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  channel_t& operator = (channel_t&&) = <span class="keywordflow">default</span>;</div>
- <div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  };</div>
- <div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  </div>
- <div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  </div>
- <div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keyword">using</span> semaphore_t = channel_t<bool>;</div>
- <div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  </div>
- <div class="line"><a name="l00242"></a><span class="lineno"> 242</span> } <span class="comment">//namespace v1</span></div>
- <div class="line"><a name="l00243"></a><span class="lineno"> 243</span> } <span class="comment">//namespace resumef</span></div>
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