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基于C++ Coroutines提案 ‘Stackless Resumable Functions’编写的协程库
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  61. 

  62. <div id="nav-path" class="navpath">

  63.   <ul>

  64. <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>

  65. </div>

  66. </div><!-- top -->

  67. <div class="header">

  68.   <div class="headertitle">

  69. <div class="title">spinlock.h</div>  </div>

  70. </div><!--header-->

  71. <div class="contents">

  72. <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">//用于内部实现的循环锁</span></div>

  73. <div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160; </div>

  74. <div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="preprocessor">#pragma once</span></div>

  75. <div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160; </div>

  76. <div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="keyword">namespace </span>resumef</div>

  77. <div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;{</div>

  78. <div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="preprocessor">#if defined(RESUMEF_USE_CUSTOM_SPINLOCK)</span></div>

  79. <div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;    <span class="keyword">using</span> spinlock = RESUMEF_USE_CUSTOM_SPINLOCK;</div>

  80. <div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="preprocessor">#else</span></div>

  81. <div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160; </div>

  82. <div class="line"><a name="l00014"></a><span class="lineno"><a class="line" href="structresumef_1_1spinlock.html">   14</a></span>&#160;    <span class="keyword">struct </span><a class="code" href="structresumef_1_1spinlock.html">spinlock</a></div>

  83. <div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;    {</div>

  84. <div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;        <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">size_t</span> MAX_ACTIVE_SPIN = 4000;</div>

  85. <div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;        <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">size_t</span> MAX_YIELD_SPIN = 8000;</div>

  86. <div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;        <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> FREE_VALUE = 0;</div>

  87. <div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;        <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> LOCKED_VALUE = 1;</div>

  88. <div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160; </div>

  89. <div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;        std::atomic&lt;int&gt; lck;</div>

  90. <div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor">#if _DEBUG</span></div>

  91. <div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;        std::thread::id owner_thread_id;</div>

  92. <div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="preprocessor">#endif</span></div>

  93. <div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160; </div>

  94. <div class="line"><a name="l00029"></a><span class="lineno"><a class="line" href="structresumef_1_1spinlock.html#a32730a90789147297f9777fe866a224f">   29</a></span>&#160;        <a class="code" href="structresumef_1_1spinlock.html#a32730a90789147297f9777fe866a224f">spinlock</a>() noexcept</div>

  95. <div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;        {</div>

  96. <div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;            lck = FREE_VALUE;</div>

  97. <div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;        }</div>

  98. <div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160; </div>

  99. <div class="line"><a name="l00037"></a><span class="lineno"><a class="line" href="structresumef_1_1spinlock.html#ae313002e0db9c20b32d386e4eb91c372">   37</a></span>&#160;        <span class="keywordtype">void</span> <a class="code" href="structresumef_1_1spinlock.html#ae313002e0db9c20b32d386e4eb91c372">lock</a>() noexcept</div>

  100. <div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;        {</div>

  101. <div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;            <span class="keywordtype">int</span> val = FREE_VALUE;</div>

  102. <div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;            <span class="keywordflow">if</span> (!lck.compare_exchange_weak(val, LOCKED_VALUE, std::memory_order_acq_rel))</div>

  103. <div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;            {</div>

  104. <div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="preprocessor">#if _DEBUG</span></div>

  105. <div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;                <span class="comment">//诊断错误的用法：进行了递归锁调用</span></div>

  106. <div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;                assert(owner_thread_id != std::this_thread::get_id());</div>

  107. <div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="preprocessor">#endif</span></div>

  108. <div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160; </div>

  109. <div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;                <span class="keywordtype">size_t</span> spinCount = 0;</div>

  110. <div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;                <span class="keyword">auto</span> dt = std::chrono::milliseconds{ 1 };</div>

  111. <div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;                <span class="keywordflow">do</span></div>

  112. <div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;                {</div>

  113. <div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;                    <span class="keywordflow">while</span> (lck.load(std::memory_order_relaxed) != FREE_VALUE)</div>

  114. <div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;                    {</div>

  115. <div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;                        <span class="keywordflow">if</span> (spinCount &lt; MAX_ACTIVE_SPIN)</div>

  116. <div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;                        {</div>

  117. <div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;                            ++spinCount;</div>

  118. <div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;                        }</div>

  119. <div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;                        <span class="keywordflow">else</span> <span class="keywordflow">if</span> (spinCount &lt; MAX_YIELD_SPIN)</div>

  120. <div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;                        {</div>

  121. <div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;                            ++spinCount;</div>

  122. <div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;                            std::this_thread::yield();</div>

  123. <div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;                        }</div>

  124. <div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;                        <span class="keywordflow">else</span></div>

  125. <div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;                        {</div>

  126. <div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;                            std::this_thread::sleep_for(dt);</div>

  127. <div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;                            dt = (std::min)(std::chrono::milliseconds{ 128 }, dt * 2);</div>

  128. <div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;                        }</div>

  129. <div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;                    }</div>

  130. <div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160; </div>

  131. <div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;                    val = FREE_VALUE;</div>

  132. <div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;                } <span class="keywordflow">while</span> (!lck.compare_exchange_weak(val, LOCKED_VALUE, std::memory_order_acq_rel));</div>

  133. <div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;            }</div>

  134. <div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160; </div>

  135. <div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;<span class="preprocessor">#if _DEBUG</span></div>

  136. <div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;            owner_thread_id = std::this_thread::get_id();</div>

  137. <div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;<span class="preprocessor">#endif</span></div>

  138. <div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;        }</div>

  139. <div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160; </div>

  140. <div class="line"><a name="l00081"></a><span class="lineno"><a class="line" href="structresumef_1_1spinlock.html#a62a6841e933ee7845a9ba42765a1b5e3">   81</a></span>&#160;        <span class="keywordtype">bool</span> <a class="code" href="structresumef_1_1spinlock.html#a62a6841e933ee7845a9ba42765a1b5e3">try_lock</a>() noexcept</div>

  141. <div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;        {</div>

  142. <div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;            <span class="keywordtype">int</span> val = FREE_VALUE;</div>

  143. <div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;            <span class="keywordtype">bool</span> ret = lck.compare_exchange_strong(val, LOCKED_VALUE, std::memory_order_acq_rel);</div>

  144. <div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160; </div>

  145. <div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;<span class="preprocessor">#if _DEBUG</span></div>

  146. <div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;            <span class="keywordflow">if</span> (ret) owner_thread_id = std::this_thread::get_id();</div>

  147. <div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;<span class="preprocessor">#endif</span></div>

  148. <div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160; </div>

  149. <div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;            <span class="keywordflow">return</span> ret;</div>

  150. <div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;        }</div>

  151. <div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160; </div>

  152. <div class="line"><a name="l00096"></a><span class="lineno"><a class="line" href="structresumef_1_1spinlock.html#af6d49dc277c0719e282a9387ed3c35e9">   96</a></span>&#160;        <span class="keywordtype">void</span> <a class="code" href="structresumef_1_1spinlock.html#af6d49dc277c0719e282a9387ed3c35e9">unlock</a>() noexcept</div>

  153. <div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;        {</div>

  154. <div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;<span class="preprocessor">#if _DEBUG</span></div>

  155. <div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;            owner_thread_id = std::thread::id();</div>

  156. <div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;<span class="preprocessor">#endif</span></div>

  157. <div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;            lck.store(FREE_VALUE, std::memory_order_release);</div>

  158. <div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;        }</div>

  159. <div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;    };</div>

  160. <div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160; </div>

  161. <div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;<span class="preprocessor">#endif</span></div>

  162. <div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160; </div>

  163. <div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;<span class="preprocessor">#ifndef DOXYGEN_SKIP_PROPERTY</span></div>

  164. <div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;    <span class="keyword">namespace </span>detail</div>

  165. <div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;    {</div>

  166. <div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;        <span class="keyword">template</span>&lt;<span class="keyword">class</span> _Ty, <span class="keyword">class</span> _Cont = std::vector&lt;_Ty&gt;&gt;</div>

  167. <div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;        <span class="keyword">struct </span>_LockVectorAssembleT</div>

  168. <div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;        {</div>

  169. <div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;        <span class="keyword">private</span>:</div>

  170. <div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;            _Cont&amp; _Lks;</div>

  171. <div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;        <span class="keyword">public</span>:</div>

  172. <div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;            _LockVectorAssembleT(_Cont&amp; _LkN)</div>

  173. <div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;                : _Lks(_LkN)</div>

  174. <div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;            {}</div>

  175. <div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;            <span class="keywordtype">size_t</span> size()<span class="keyword"> const</span></div>

  176. <div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;<span class="keyword">            </span>{</div>

  177. <div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;                <span class="keywordflow">return</span> _Lks.size();</div>

  178. <div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;            }</div>

  179. <div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;            _Ty&amp; operator[](<span class="keywordtype">int</span> _Idx)</div>

  180. <div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;            {</div>

  181. <div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;                <span class="keywordflow">return</span> _Lks[_Idx];</div>

  182. <div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;            }</div>

  183. <div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;            <span class="keywordtype">void</span> _Lock_ref(_Ty&amp; _LkN)<span class="keyword"> const</span></div>

  184. <div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;<span class="keyword">            </span>{</div>

  185. <div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;                _LkN.lock();</div>

  186. <div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;            }</div>

  187. <div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;            <span class="keywordtype">bool</span> _Try_lock_ref(_Ty&amp; _LkN)<span class="keyword"> const</span></div>

  188. <div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;<span class="keyword">            </span>{</div>

  189. <div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;                <span class="keywordflow">return</span> _LkN.try_lock();</div>

  190. <div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;            }</div>

  191. <div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;            <span class="keywordtype">void</span> _Unlock_ref(_Ty&amp; _LkN)<span class="keyword"> const</span></div>

  192. <div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;<span class="keyword">            </span>{</div>

  193. <div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;                _LkN.unlock();</div>

  194. <div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;            }</div>

  195. <div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;            <span class="keywordtype">void</span> _Yield()<span class="keyword"> const</span></div>

  196. <div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;<span class="keyword">            </span>{</div>

  197. <div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;                std::this_thread::yield();</div>

  198. <div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;            }</div>

  199. <div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;            <span class="keywordtype">void</span> _ReturnValue() <span class="keyword">const</span>;</div>

  200. <div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;            <span class="keyword">template</span>&lt;<span class="keyword">class</span> U&gt;</div>

  201. <div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;            U _ReturnValue(U v) <span class="keyword">const</span>;</div>

  202. <div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;        };</div>

  203. <div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160; </div>

  204. <div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;        <span class="keyword">template</span>&lt;<span class="keyword">class</span> _Ty, <span class="keyword">class</span> _Cont&gt;</div>

  205. <div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;        <span class="keyword">struct </span>_LockVectorAssembleT&lt;std::reference_wrapper&lt;_Ty&gt;, _Cont&gt;</div>

  206. <div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;        {</div>

  207. <div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;        <span class="keyword">private</span>:</div>

  208. <div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;            _Cont&amp; _Lks;</div>

  209. <div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;        <span class="keyword">public</span>:</div>

  210. <div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;            _LockVectorAssembleT(_Cont&amp; _LkN)</div>

  211. <div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;                : _Lks(_LkN)</div>

  212. <div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;            {}</div>

  213. <div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;            <span class="keywordtype">size_t</span> size()<span class="keyword"> const</span></div>

  214. <div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;<span class="keyword">            </span>{</div>

  215. <div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;                <span class="keywordflow">return</span> _Lks.size();</div>

  216. <div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;            }</div>

  217. <div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;            std::reference_wrapper&lt;_Ty&gt; operator[](<span class="keywordtype">int</span> _Idx)</div>

  218. <div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;            {</div>

  219. <div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;                <span class="keywordflow">return</span> _Lks[_Idx];</div>

  220. <div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;            }</div>

  221. <div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;            <span class="keywordtype">void</span> _Lock_ref(std::reference_wrapper&lt;_Ty&gt; _LkN)<span class="keyword"> const</span></div>

  222. <div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;<span class="keyword">            </span>{</div>

  223. <div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;                _LkN.get().lock();</div>

  224. <div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;            }</div>

  225. <div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;            <span class="keywordtype">void</span> _Unlock_ref(std::reference_wrapper&lt;_Ty&gt; _LkN)<span class="keyword"> const</span></div>

  226. <div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;<span class="keyword">            </span>{</div>

  227. <div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;                _LkN.get().unlock();</div>

  228. <div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;            }</div>

  229. <div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;            <span class="keywordtype">bool</span> _Try_lock_ref(std::reference_wrapper&lt;_Ty&gt; _LkN)<span class="keyword"> const</span></div>

  230. <div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;<span class="keyword">            </span>{</div>

  231. <div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;                <span class="keywordflow">return</span> _LkN.get().try_lock();</div>

  232. <div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;            }</div>

  233. <div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;            <span class="keywordtype">void</span> _Yield()<span class="keyword"> const</span></div>

  234. <div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;<span class="keyword">            </span>{</div>

  235. <div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;                std::this_thread::yield();</div>

  236. <div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;            }</div>

  237. <div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;            <span class="keywordtype">void</span> _ReturnValue() <span class="keyword">const</span>;</div>

  238. <div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;            <span class="keyword">template</span>&lt;<span class="keyword">class</span> U&gt;</div>

  239. <div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;            U _ReturnValue(U v) <span class="keyword">const</span>;</div>

  240. <div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;        };</div>

  241. <div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160; </div>

  242. <div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;<span class="preprocessor">#define LOCK_ASSEMBLE_NAME(fnName) scoped_lock_range_##fnName</span></div>

  243. <div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;<span class="preprocessor">#define LOCK_ASSEMBLE_AWAIT(a) (a)</span></div>

  244. <div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;<span class="preprocessor">#define LOCK_ASSEMBLE_RETURN(a) return (a)</span></div>

  245. <div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;<span class="preprocessor">#include &quot;without_deadlock_assemble.inl&quot;</span></div>

  246. <div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;<span class="preprocessor">#undef LOCK_ASSEMBLE_NAME</span></div>

  247. <div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;<span class="preprocessor">#undef LOCK_ASSEMBLE_AWAIT</span></div>

  248. <div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;<span class="preprocessor">#undef LOCK_ASSEMBLE_RETURN</span></div>

  249. <div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;    }</div>

  250. <div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;<span class="preprocessor">#endif  //DOXYGEN_SKIP_PROPERTY</span></div>

  251. <div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160; </div>

  252. <div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;    <span class="keyword">template</span>&lt;<span class="keyword">class</span> _Ty, <span class="keyword">class</span> _Cont = std::vector&lt;_Ty&gt;, <span class="keyword">class</span> _Assemble = detail::_LockVectorAssembleT&lt;_Ty, _Cont&gt;&gt;</div>

  253. <div class="line"><a name="l00203"></a><span class="lineno"><a class="line" href="classresumef_1_1batch__lock__t.html">  203</a></span>&#160;    <span class="keyword">class </span><a class="code" href="classresumef_1_1batch__lock__t.html">batch_lock_t</a></div>

  254. <div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;    {</div>

  255. <div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;    <span class="keyword">public</span>:</div>

  256. <div class="line"><a name="l00209"></a><span class="lineno"><a class="line" href="classresumef_1_1batch__lock__t.html#a3779f0030948ad54e4f97c8e73afa44d">  209</a></span>&#160;        <span class="keyword">explicit</span> <a class="code" href="classresumef_1_1batch__lock__t.html#a3779f0030948ad54e4f97c8e73afa44d">batch_lock_t</a>(_Cont&amp; locks_)</div>

  257. <div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;            : _LkN(&amp;locks_)</div>

  258. <div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;            , _LA(*_LkN)</div>

  259. <div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;        {</div>

  260. <div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;            detail::scoped_lock_range_lock_impl::_Lock_range(_LA);</div>

  261. <div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;        }</div>

  262. <div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;        </div>

  263. <div class="line"><a name="l00219"></a><span class="lineno"><a class="line" href="classresumef_1_1batch__lock__t.html#af46b0d1ba6494e2955660271b190a99a">  219</a></span>&#160;        <span class="keyword">explicit</span> <a class="code" href="classresumef_1_1batch__lock__t.html#af46b0d1ba6494e2955660271b190a99a">batch_lock_t</a>(_Cont&amp; locks_, _Assemble&amp; la_)</div>

  264. <div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;            : _LkN(&amp;locks_)</div>

  265. <div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;            , _LA(la_)</div>

  266. <div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;        {</div>

  267. <div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;            detail::scoped_lock_range_lock_impl::_Lock_range(_LA);</div>

  268. <div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;        }</div>

  269. <div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160; </div>

  270. <div class="line"><a name="l00229"></a><span class="lineno"><a class="line" href="classresumef_1_1batch__lock__t.html#a2293d0f5d68f335ed8dd0bb6e89321a6">  229</a></span>&#160;        <span class="keyword">explicit</span> <a class="code" href="classresumef_1_1batch__lock__t.html#a2293d0f5d68f335ed8dd0bb6e89321a6">batch_lock_t</a>(std::adopt_lock_t, _Cont&amp; locks_)</div>

  271. <div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;            : _LkN(&amp;locks_)</div>

  272. <div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;            , _LA(*_LkN)</div>

  273. <div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;        { <span class="comment">// construct but don&#39;t lock</span></div>

  274. <div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;        }</div>

  275. <div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160; </div>

  276. <div class="line"><a name="l00238"></a><span class="lineno"><a class="line" href="classresumef_1_1batch__lock__t.html#abf8d154d25e3b66eb308750052fb660e">  238</a></span>&#160;        <span class="keyword">explicit</span> <a class="code" href="classresumef_1_1batch__lock__t.html#abf8d154d25e3b66eb308750052fb660e">batch_lock_t</a>(std::adopt_lock_t, _Cont&amp; locks_, _Assemble&amp; la_)</div>

  277. <div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;            : _LkN(&amp;locks_)</div>

  278. <div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;            , _LA(la_)</div>

  279. <div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;        { <span class="comment">// construct but don&#39;t lock</span></div>

  280. <div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;        }</div>

  281. <div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160; </div>

  282. <div class="line"><a name="l00247"></a><span class="lineno"><a class="line" href="classresumef_1_1batch__lock__t.html#a661dad263c32b25b6bcc92c0d7b73830">  247</a></span>&#160;        <a class="code" href="classresumef_1_1batch__lock__t.html#a661dad263c32b25b6bcc92c0d7b73830">~batch_lock_t</a>() noexcept</div>

  283. <div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;        {</div>

  284. <div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;            <span class="keywordflow">if</span> (_LkN != <span class="keyword">nullptr</span>)</div>

  285. <div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;                detail::scoped_lock_range_lock_impl::_Unlock_locks(0, (<span class="keywordtype">int</span>)_LA.size(), _LA);</div>

  286. <div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;        }</div>

  287. <div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160; </div>

  288. <div class="line"><a name="l00256"></a><span class="lineno"><a class="line" href="classresumef_1_1batch__lock__t.html#abc72b35a9eef1bd6c39955d63cc8ce9c">  256</a></span>&#160;        <span class="keywordtype">void</span> <a class="code" href="classresumef_1_1batch__lock__t.html#abc72b35a9eef1bd6c39955d63cc8ce9c">unlock</a>()</div>

  289. <div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;        {</div>

  290. <div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;            <span class="keywordflow">if</span> (_LkN != <span class="keyword">nullptr</span>)</div>

  291. <div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;            {</div>

  292. <div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;                _LkN = <span class="keyword">nullptr</span>;</div>

  293. <div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;                detail::scoped_lock_range_lock_impl::_Unlock_locks(0, (<span class="keywordtype">int</span>)_LA.size(), _LA);</div>

  294. <div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;            }</div>

  295. <div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;        }</div>

  296. <div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160; </div>

  297. <div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;        <a class="code" href="classresumef_1_1batch__lock__t.html#a3779f0030948ad54e4f97c8e73afa44d">batch_lock_t</a>(<span class="keyword">const</span> <a class="code" href="classresumef_1_1batch__lock__t.html">batch_lock_t</a>&amp;) = <span class="keyword">delete</span>;</div>

  298. <div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160; </div>

  299. <div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;        <a class="code" href="classresumef_1_1batch__lock__t.html">batch_lock_t</a>&amp; <a class="code" href="classresumef_1_1batch__lock__t.html#aabbfeb513ac907b9c8caf6fda9a356d4">operator=</a>(<span class="keyword">const</span> <a class="code" href="classresumef_1_1batch__lock__t.html">batch_lock_t</a>&amp;) = <span class="keyword">delete</span>;</div>

  300. <div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160; </div>

  301. <div class="line"><a name="l00278"></a><span class="lineno"><a class="line" href="classresumef_1_1batch__lock__t.html#a820544949fcf42d08759f5f29686cc9c">  278</a></span>&#160;        <a class="code" href="classresumef_1_1batch__lock__t.html#a820544949fcf42d08759f5f29686cc9c">batch_lock_t</a>(<a class="code" href="classresumef_1_1batch__lock__t.html">batch_lock_t</a>&amp;&amp; _Right)</div>

  302. <div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;            : _LkN(_Right._LkN)</div>

  303. <div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;            , _LA(std::move(_Right._LA))</div>

  304. <div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;        {</div>

  305. <div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;            _Right._LkN = <span class="keyword">nullptr</span>;</div>

  306. <div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;        }</div>

  307. <div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160; </div>

  308. <div class="line"><a name="l00288"></a><span class="lineno"><a class="line" href="classresumef_1_1batch__lock__t.html#a057618d5a806ffe6fd106f851082f12e">  288</a></span>&#160;        <a class="code" href="classresumef_1_1batch__lock__t.html">batch_lock_t</a>&amp; <a class="code" href="classresumef_1_1batch__lock__t.html#a057618d5a806ffe6fd106f851082f12e">operator=</a>(<a class="code" href="classresumef_1_1batch__lock__t.html">batch_lock_t</a>&amp;&amp; _Right)</div>

  309. <div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;        {</div>

  310. <div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;            <span class="keywordflow">if</span> (<span class="keyword">this</span> != &amp;_Right)</div>

  311. <div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;            {</div>

  312. <div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;                _LkN = _Right._LkN;</div>

  313. <div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;                _Right._LkN = <span class="keyword">nullptr</span>;</div>

  314. <div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160; </div>

  315. <div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;                _LA = std::move(_Right._LA);</div>

  316. <div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;            }</div>

  317. <div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;        }</div>

  318. <div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;    <span class="keyword">private</span>:</div>

  319. <div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;        _Cont* _LkN;</div>

  320. <div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;        _Assemble _LA;</div>

  321. <div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;    };</div>

  322. <div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;}</div>

  323. </div><!-- fragment --></div><!-- contents -->

  324. <div class="ttc" id="aclassresumef_1_1batch__lock__t_html_a2293d0f5d68f335ed8dd0bb6e89321a6"><div class="ttname"><a href="classresumef_1_1batch__lock__t.html#a2293d0f5d68f335ed8dd0bb6e89321a6">resumef::batch_lock_t::batch_lock_t</a></div><div class="ttdeci">batch_lock_t(std::adopt_lock_t, _Cont &amp;locks_)</div><div class="ttdoc">通过锁容器构造，容器里的锁已经全部获得。</div><div class="ttdef"><b>Definition:</b> spinlock.h:229</div></div>

  325. <div class="ttc" id="aclassresumef_1_1batch__lock__t_html_a820544949fcf42d08759f5f29686cc9c"><div class="ttname"><a href="classresumef_1_1batch__lock__t.html#a820544949fcf42d08759f5f29686cc9c">resumef::batch_lock_t::batch_lock_t</a></div><div class="ttdeci">batch_lock_t(batch_lock_t &amp;&amp;_Right)</div><div class="ttdoc">支持移动构造。</div><div class="ttdef"><b>Definition:</b> spinlock.h:278</div></div>

  326. <div class="ttc" id="aclassresumef_1_1batch__lock__t_html_a661dad263c32b25b6bcc92c0d7b73830"><div class="ttname"><a href="classresumef_1_1batch__lock__t.html#a661dad263c32b25b6bcc92c0d7b73830">resumef::batch_lock_t::~batch_lock_t</a></div><div class="ttdeci">~batch_lock_t() noexcept</div><div class="ttdoc">析构函数里，释放容器里的锁。</div><div class="ttdef"><b>Definition:</b> spinlock.h:247</div></div>

  327. <div class="ttc" id="astructresumef_1_1spinlock_html_a32730a90789147297f9777fe866a224f"><div class="ttname"><a href="structresumef_1_1spinlock.html#a32730a90789147297f9777fe866a224f">resumef::spinlock::spinlock</a></div><div class="ttdeci">spinlock() noexcept</div><div class="ttdoc">初始为未加锁。</div><div class="ttdef"><b>Definition:</b> spinlock.h:29</div></div>

  328. <div class="ttc" id="aclassresumef_1_1batch__lock__t_html_aabbfeb513ac907b9c8caf6fda9a356d4"><div class="ttname"><a href="classresumef_1_1batch__lock__t.html#aabbfeb513ac907b9c8caf6fda9a356d4">resumef::batch_lock_t::operator=</a></div><div class="ttdeci">batch_lock_t &amp; operator=(const batch_lock_t &amp;)=delete</div><div class="ttdoc">不支持拷贝赋值。</div></div>

  329. <div class="ttc" id="astructresumef_1_1spinlock_html_af6d49dc277c0719e282a9387ed3c35e9"><div class="ttname"><a href="structresumef_1_1spinlock.html#af6d49dc277c0719e282a9387ed3c35e9">resumef::spinlock::unlock</a></div><div class="ttdeci">void unlock() noexcept</div><div class="ttdoc">释放锁。</div><div class="ttdef"><b>Definition:</b> spinlock.h:96</div></div>

  330. <div class="ttc" id="aclassresumef_1_1batch__lock__t_html_a3779f0030948ad54e4f97c8e73afa44d"><div class="ttname"><a href="classresumef_1_1batch__lock__t.html#a3779f0030948ad54e4f97c8e73afa44d">resumef::batch_lock_t::batch_lock_t</a></div><div class="ttdeci">batch_lock_t(_Cont &amp;locks_)</div><div class="ttdoc">通过锁容器构造，并立刻应用加锁算法。</div><div class="ttdef"><b>Definition:</b> spinlock.h:209</div></div>

  331. <div class="ttc" id="astructresumef_1_1spinlock_html_ae313002e0db9c20b32d386e4eb91c372"><div class="ttname"><a href="structresumef_1_1spinlock.html#ae313002e0db9c20b32d386e4eb91c372">resumef::spinlock::lock</a></div><div class="ttdeci">void lock() noexcept</div><div class="ttdoc">获得锁。会一直阻塞线程直到获得锁。</div><div class="ttdef"><b>Definition:</b> spinlock.h:37</div></div>

  332. <div class="ttc" id="aclassresumef_1_1batch__lock__t_html"><div class="ttname"><a href="classresumef_1_1batch__lock__t.html">resumef::batch_lock_t</a></div><div class="ttdoc">无死锁的批量枷锁。</div><div class="ttdef"><b>Definition:</b> spinlock.h:203</div></div>

  333. <div class="ttc" id="astructresumef_1_1spinlock_html_a62a6841e933ee7845a9ba42765a1b5e3"><div class="ttname"><a href="structresumef_1_1spinlock.html#a62a6841e933ee7845a9ba42765a1b5e3">resumef::spinlock::try_lock</a></div><div class="ttdeci">bool try_lock() noexcept</div><div class="ttdoc">尝试获得锁一次。</div><div class="ttdef"><b>Definition:</b> spinlock.h:81</div></div>

  334. <div class="ttc" id="aclassresumef_1_1batch__lock__t_html_af46b0d1ba6494e2955660271b190a99a"><div class="ttname"><a href="classresumef_1_1batch__lock__t.html#af46b0d1ba6494e2955660271b190a99a">resumef::batch_lock_t::batch_lock_t</a></div><div class="ttdeci">batch_lock_t(_Cont &amp;locks_, _Assemble &amp;la_)</div><div class="ttdoc">通过锁容器和锁集合构造，并立刻应用加锁算法。</div><div class="ttdef"><b>Definition:</b> spinlock.h:219</div></div>

  335. <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>

  336. <div class="ttc" id="aclassresumef_1_1batch__lock__t_html_a057618d5a806ffe6fd106f851082f12e"><div class="ttname"><a href="classresumef_1_1batch__lock__t.html#a057618d5a806ffe6fd106f851082f12e">resumef::batch_lock_t::operator=</a></div><div class="ttdeci">batch_lock_t &amp; operator=(batch_lock_t &amp;&amp;_Right)</div><div class="ttdoc">支持移动赋值。</div><div class="ttdef"><b>Definition:</b> spinlock.h:288</div></div>

  337. <div class="ttc" id="aclassresumef_1_1batch__lock__t_html_abf8d154d25e3b66eb308750052fb660e"><div class="ttname"><a href="classresumef_1_1batch__lock__t.html#abf8d154d25e3b66eb308750052fb660e">resumef::batch_lock_t::batch_lock_t</a></div><div class="ttdeci">batch_lock_t(std::adopt_lock_t, _Cont &amp;locks_, _Assemble &amp;la_)</div><div class="ttdoc">通过锁容器和锁集合构造，容器里的锁已经全部获得。</div><div class="ttdef"><b>Definition:</b> spinlock.h:238</div></div>

  338. <div class="ttc" id="aclassresumef_1_1batch__lock__t_html_abc72b35a9eef1bd6c39955d63cc8ce9c"><div class="ttname"><a href="classresumef_1_1batch__lock__t.html#abc72b35a9eef1bd6c39955d63cc8ce9c">resumef::batch_lock_t::unlock</a></div><div class="ttdeci">void unlock()</div><div class="ttdoc">手工释放容器里的锁，析构函数里将不再有释放操作。</div><div class="ttdef"><b>Definition:</b> spinlock.h:256</div></div>

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