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  108.   <div class="headertitle"><div class="title">JobSystemWithBarrier.h</div></div>
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    110. 

  110. <div class="contents">
    111. 

  111. <a href="_job_system_with_barrier_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)</span></div>
    112. 

  112. <div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment">// SPDX-FileCopyrightText: 2023 Jorrit Rouwe</span></div>
    113. 

  113. <div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment">// SPDX-License-Identifier: MIT</span></div>
    114. 

  114. <div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span> </div>
    115. 

  115. <div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="preprocessor">#pragma once</span></div>
    116. 

  116. <div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span> </div>
    117. 

  117. <div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="preprocessor">#include &lt;<a class="code" href="_job_system_8h.html">Jolt/Core/JobSystem.h</a>&gt;</span></div>
    118. 

  118. <div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="preprocessor">#include &lt;<a class="code" href="_semaphore_8h.html">Jolt/Core/Semaphore.h</a>&gt;</span></div>
    119. 

  119. <div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span> </div>
    120. 

  120. <div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><a class="code hl_define" href="_core_8h.html#ad14098b68b8c44ea6112601031268405">JPH_NAMESPACE_BEGIN</a></div>
    121. 

  121. <div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span> </div>
    122. 

  122. <div class="foldopen" id="foldopen00023" data-start="{" data-end="};">
    123. 

  123. <div class="line"><a id="l00023" name="l00023"></a><span class="lineno"><a class="line" href="class_job_system_with_barrier.html">   23</a></span><span class="keyword">class </span><a class="code hl_define" href="_core_8h.html#a2712a9b0f778ab9d1aa5118b4e8e6bd8">JPH_EXPORT</a> <a class="code hl_class" href="class_job_system_with_barrier.html">JobSystemWithBarrier</a> : <span class="keyword">public</span> <a class="code hl_class" href="class_job_system.html">JobSystem</a></div>
    124. 

  124. <div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span>{</div>
    125. 

  125. <div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span><span class="keyword">public</span>:</div>
    126. 

  126. <div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span>    <a class="code hl_define" href="_memory_8h.html#a91074fb218fe28954a0938c099ddd9e0">JPH_OVERRIDE_NEW_DELETE</a></div>
    127. 

  127. <div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span> </div>
    128. 

  128. <div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span>    <span class="keyword">explicit</span>                <a class="code hl_class" href="class_job_system_with_barrier.html">JobSystemWithBarrier</a>(<a class="code hl_typedef" href="_core_8h.html#a69aa29b598b851b0640aa225a9e5d61d">uint</a> inMaxBarriers);</div>
    129. 

  129. <div class="line"><a id="l00031" name="l00031"></a><span class="lineno"><a class="line" href="class_job_system_with_barrier.html#aaf97f3f021e97a501e5383f55c3625e6">   31</a></span>                            <a class="code hl_function" href="class_job_system_with_barrier.html#aaf97f3f021e97a501e5383f55c3625e6">JobSystemWithBarrier</a>() = <span class="keywordflow">default</span>;</div>
    130. 

  130. <div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span>    <span class="keyword">virtual</span>                 <a class="code hl_class" href="class_job_system_with_barrier.html">~JobSystemWithBarrier</a>() <span class="keyword">override</span>;</div>
    131. 

  131. <div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span> </div>
    132. 

  132. <div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span>    <span class="keywordtype">void</span>                    Init(<a class="code hl_typedef" href="_core_8h.html#a69aa29b598b851b0640aa225a9e5d61d">uint</a> inMaxBarriers);</div>
    133. 

  133. <div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span> </div>
    134. 

  134. <div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span>    <span class="comment">// See JobSystem</span></div>
    135. 

  135. <div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span>    <span class="keyword">virtual</span> <a class="code hl_class" href="class_job_system_1_1_barrier.html">Barrier</a> *       <a class="code hl_function" href="class_job_system.html#a2bd7c3efdc8f934b728ee1787e0bd58e">CreateBarrier</a>() <span class="keyword">override</span>;</div>
    136. 

  136. <div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span>    <span class="keyword">virtual</span> <span class="keywordtype">void</span>            <a class="code hl_function" href="class_job_system.html#a51c615924cf4f8eefb8e3fbe72041373">DestroyBarrier</a>(<a class="code hl_class" href="class_job_system_1_1_barrier.html">Barrier</a> *inBarrier) <span class="keyword">override</span>;</div>
    137. 

  137. <div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span>    <span class="keyword">virtual</span> <span class="keywordtype">void</span>            <a class="code hl_function" href="class_job_system.html#a32e93cf0a95e8893978cf1ee92eb41d7">WaitForJobs</a>(<a class="code hl_class" href="class_job_system_1_1_barrier.html">Barrier</a> *inBarrier) <span class="keyword">override</span>;</div>
    138. 

  138. <div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span> </div>
    139. 

  139. <div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span><span class="keyword">private</span>:</div>
    140. 

  140. <div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span>    <span class="keyword">class </span>BarrierImpl : <span class="keyword">public</span> <a class="code hl_class" href="class_job_system_1_1_barrier.html">Barrier</a></div>
    141. 

  141. <div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span>    {</div>
    142. 

  142. <div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span>    <span class="keyword">public</span>:</div>
    143. 

  143. <div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span>        <a class="code hl_define" href="_memory_8h.html#a91074fb218fe28954a0938c099ddd9e0">JPH_OVERRIDE_NEW_DELETE</a></div>
    144. 

  144. <div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span> </div>
    145. 

  145. <div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span>                            BarrierImpl();</div>
    146. 

  146. <div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span>        <span class="keyword">virtual</span>             ~BarrierImpl() <span class="keyword">override</span>;</div>
    147. 

  147. <div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span> </div>
    148. 

  148. <div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span>        <span class="comment">// See Barrier</span></div>
    149. 

  149. <div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span>        <span class="keyword">virtual</span> <span class="keywordtype">void</span>        AddJob(<span class="keyword">const</span> <a class="code hl_class" href="class_job_system_1_1_job_handle.html">JobHandle</a> &amp;inJob) <span class="keyword">override</span>;</div>
    150. 

  150. <div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span>        <span class="keyword">virtual</span> <span class="keywordtype">void</span>        AddJobs(<span class="keyword">const</span> <a class="code hl_class" href="class_job_system_1_1_job_handle.html">JobHandle</a> *inHandles, <a class="code hl_typedef" href="_core_8h.html#a69aa29b598b851b0640aa225a9e5d61d">uint</a> inNumHandles) <span class="keyword">override</span>;</div>
    151. 

  151. <div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span> </div>
    152. 

  152. <div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span>        <span class="keyword">inline</span> <span class="keywordtype">bool</span>         IsEmpty()<span class="keyword"> const                                 </span>{ <span class="keywordflow">return</span> mJobReadIndex == mJobWriteIndex; }</div>
    153. 

  153. <div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span> </div>
    154. 

  154. <div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span>        <span class="keywordtype">void</span>                Wait();</div>
    155. 

  155. <div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span> </div>
    156. 

  156. <div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span>        atomic&lt;bool&gt;        mInUse { <span class="keyword">false</span> };</div>
    157. 

  157. <div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span> </div>
    158. 

  158. <div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span>    <span class="keyword">protected</span>:</div>
    159. 

  159. <div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span>        <span class="keyword">virtual</span> <span class="keywordtype">void</span>        OnJobFinished(Job *inJob) <span class="keyword">override</span>;</div>
    160. 

  160. <div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span> </div>
    161. 

  161. <div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span>        <span class="keyword">static</span> <span class="keyword">constexpr</span> <a class="code hl_typedef" href="_core_8h.html#a69aa29b598b851b0640aa225a9e5d61d">uint</a> cMaxJobs = 2048;</div>
    162. 

  162. <div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span>        <span class="keyword">static_assert</span>(<a class="code hl_function" href="_math_8h.html#a531058b1613a4e5123a68a704673e1a2">IsPowerOf2</a>(cMaxJobs));                                <span class="comment">// We do bit operations and require max jobs to be a power of 2</span></div>
    163. 

  163. <div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>        atomic&lt;Job *&gt;       mJobs[cMaxJobs];                                </div>
    164. 

  164. <div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span>        <span class="keyword">alignas</span>(<a class="code hl_define" href="_core_8h.html#a2eca4e00d11d8fdbbd04c4a23a244278">JPH_CACHE_LINE_SIZE</a>) atomic&lt;uint&gt; mJobReadIndex { 0 };      </div>
    165. 

  165. <div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span>        <span class="keyword">alignas</span>(<a class="code hl_define" href="_core_8h.html#a2eca4e00d11d8fdbbd04c4a23a244278">JPH_CACHE_LINE_SIZE</a>) atomic&lt;uint&gt; mJobWriteIndex { 0 };     </div>
    166. 

  166. <div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span>        atomic&lt;int&gt;         mNumToAcquire { 0 };                            </div>
    167. 

  167. <div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span>        <a class="code hl_class" href="class_semaphore.html">Semaphore</a>           mSemaphore;                                     </div>
    168. 

  168. <div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span>    };</div>
    169. 

  169. <div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span> </div>
    170. 

  170. <div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span>    <a class="code hl_typedef" href="_core_8h.html#a69aa29b598b851b0640aa225a9e5d61d">uint</a>                    mMaxBarriers = 0;                               </div>
    171. 

  171. <div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span>    BarrierImpl *           mBarriers = <span class="keyword">nullptr</span>;                            </div>
    172. 

  172. <div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span>};</div>
    173. 

  173. </div>
    174. 

  174. <div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span> </div>
    175. 

  175. <div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span><a class="code hl_define" href="_core_8h.html#a73da8725998b00321a9db341202d650d">JPH_NAMESPACE_END</a></div>
    176. 

  176. <div class="ttc" id="a_core_8h_html_a2712a9b0f778ab9d1aa5118b4e8e6bd8"><div class="ttname"><a href="_core_8h.html#a2712a9b0f778ab9d1aa5118b4e8e6bd8">JPH_EXPORT</a></div><div class="ttdeci">#define JPH_EXPORT</div><div class="ttdef"><b>Definition</b> Core.h:275</div></div>
    177. 

  177. <div class="ttc" id="a_core_8h_html_a2eca4e00d11d8fdbbd04c4a23a244278"><div class="ttname"><a href="_core_8h.html#a2eca4e00d11d8fdbbd04c4a23a244278">JPH_CACHE_LINE_SIZE</a></div><div class="ttdeci">#define JPH_CACHE_LINE_SIZE</div><div class="ttdef"><b>Definition</b> Core.h:545</div></div>
    178. 

  178. <div class="ttc" id="a_core_8h_html_a69aa29b598b851b0640aa225a9e5d61d"><div class="ttname"><a href="_core_8h.html#a69aa29b598b851b0640aa225a9e5d61d">uint</a></div><div class="ttdeci">unsigned int uint</div><div class="ttdef"><b>Definition</b> Core.h:500</div></div>
    179. 

  179. <div class="ttc" id="a_core_8h_html_a73da8725998b00321a9db341202d650d"><div class="ttname"><a href="_core_8h.html#a73da8725998b00321a9db341202d650d">JPH_NAMESPACE_END</a></div><div class="ttdeci">#define JPH_NAMESPACE_END</div><div class="ttdef"><b>Definition</b> Core.h:425</div></div>
    180. 

  180. <div class="ttc" id="a_core_8h_html_ad14098b68b8c44ea6112601031268405"><div class="ttname"><a href="_core_8h.html#ad14098b68b8c44ea6112601031268405">JPH_NAMESPACE_BEGIN</a></div><div class="ttdeci">#define JPH_NAMESPACE_BEGIN</div><div class="ttdef"><b>Definition</b> Core.h:419</div></div>
    181. 

  181. <div class="ttc" id="a_job_system_8h_html"><div class="ttname"><a href="_job_system_8h.html">JobSystem.h</a></div></div>
    182. 

  182. <div class="ttc" id="a_math_8h_html_a531058b1613a4e5123a68a704673e1a2"><div class="ttname"><a href="_math_8h.html#a531058b1613a4e5123a68a704673e1a2">IsPowerOf2</a></div><div class="ttdeci">constexpr bool IsPowerOf2(T inV)</div><div class="ttdoc">Check if inV is a power of 2.</div><div class="ttdef"><b>Definition</b> Math.h:76</div></div>
    183. 

  183. <div class="ttc" id="a_memory_8h_html_a91074fb218fe28954a0938c099ddd9e0"><div class="ttname"><a href="_memory_8h.html#a91074fb218fe28954a0938c099ddd9e0">JPH_OVERRIDE_NEW_DELETE</a></div><div class="ttdeci">#define JPH_OVERRIDE_NEW_DELETE</div><div class="ttdoc">Macro to override the new and delete functions.</div><div class="ttdef"><b>Definition</b> Memory.h:50</div></div>
    184. 

  184. <div class="ttc" id="a_semaphore_8h_html"><div class="ttname"><a href="_semaphore_8h.html">Semaphore.h</a></div></div>
    185. 

  185. <div class="ttc" id="aclass_job_system_1_1_barrier_html"><div class="ttname"><a href="class_job_system_1_1_barrier.html">JobSystem::Barrier</a></div><div class="ttdoc">A job barrier keeps track of a number of jobs and allows waiting until they are all completed.</div><div class="ttdef"><b>Definition</b> JobSystem.h:123</div></div>
    186. 

  186. <div class="ttc" id="aclass_job_system_1_1_job_handle_html"><div class="ttname"><a href="class_job_system_1_1_job_handle.html">JobSystem::JobHandle</a></div><div class="ttdef"><b>Definition</b> JobSystem.h:80</div></div>
    187. 

  187. <div class="ttc" id="aclass_job_system_html"><div class="ttname"><a href="class_job_system.html">JobSystem</a></div><div class="ttdef"><b>Definition</b> JobSystem.h:70</div></div>
    188. 

  188. <div class="ttc" id="aclass_job_system_html_a2bd7c3efdc8f934b728ee1787e0bd58e"><div class="ttname"><a href="class_job_system.html#a2bd7c3efdc8f934b728ee1787e0bd58e">JobSystem::CreateBarrier</a></div><div class="ttdeci">virtual Barrier * CreateBarrier()=0</div><div class="ttdoc">Create a new barrier, used to wait on jobs.</div></div>
    189. 

  189. <div class="ttc" id="aclass_job_system_html_a32e93cf0a95e8893978cf1ee92eb41d7"><div class="ttname"><a href="class_job_system.html#a32e93cf0a95e8893978cf1ee92eb41d7">JobSystem::WaitForJobs</a></div><div class="ttdeci">virtual void WaitForJobs(Barrier *inBarrier)=0</div><div class="ttdoc">Wait for a set of jobs to be finished, note that only 1 thread can be waiting on a barrier at a time.</div></div>
    190. 

  190. <div class="ttc" id="aclass_job_system_html_a51c615924cf4f8eefb8e3fbe72041373"><div class="ttname"><a href="class_job_system.html#a51c615924cf4f8eefb8e3fbe72041373">JobSystem::DestroyBarrier</a></div><div class="ttdeci">virtual void DestroyBarrier(Barrier *inBarrier)=0</div><div class="ttdoc">Destroy a barrier when it is no longer used. The barrier should be empty at this point.</div></div>
    191. 

  191. <div class="ttc" id="aclass_job_system_with_barrier_html"><div class="ttname"><a href="class_job_system_with_barrier.html">JobSystemWithBarrier</a></div><div class="ttdef"><b>Definition</b> JobSystemWithBarrier.h:24</div></div>
    192. 

  192. <div class="ttc" id="aclass_job_system_with_barrier_html_aaf97f3f021e97a501e5383f55c3625e6"><div class="ttname"><a href="class_job_system_with_barrier.html#aaf97f3f021e97a501e5383f55c3625e6">JobSystemWithBarrier::JobSystemWithBarrier</a></div><div class="ttdeci">JobSystemWithBarrier()=default</div></div>
    193. 

  193. <div class="ttc" id="aclass_semaphore_html"><div class="ttname"><a href="class_semaphore.html">Semaphore</a></div><div class="ttdef"><b>Definition</b> Semaphore.h:32</div></div>
    194. 

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