demo.svg

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<!-- Generated by graphviz version 2.41.20190308.1641 (20190308.1641)
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<!-- Title: bthread Pages: 1 -->
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<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 807.02)">
<title>bthread</title>
<polygon fill="#eeeeee" stroke="transparent" points="-4,4 -4,-807.02 2048,-807.02 2048,4 -4,4"/>
<g id="clust1" class="cluster">
<title>cluster_execution_queue</title>
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<g id="clust2" class="cluster">
<title>cluster_before_more_tasks</title>
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<text text-anchor="middle" x="1776" y="-778.42" font-family="Times,serif" font-size="14.00">queue status before checking for more tasks</text>
<text text-anchor="middle" x="1776" y="-762.42" font-family="Times,serif" font-size="14.00">this is the most complicated situation</text>
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<g id="clust4" class="cluster">
<title>cluster_after_more_tasks</title>
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<text text-anchor="middle" x="1242.5" y="-778.42" font-family="Times,serif" font-size="14.00">queue status after checking for more tasks</text>
<text text-anchor="middle" x="1242.5" y="-762.42" font-family="Times,serif" font-size="14.00">this is the most complicated situation</text>
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<!-- bthread_execution_queue_start -->
<g id="node1" class="node">
<title>bthread_execution_queue_start</title>
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<text text-anchor="middle" x="816" y="-726.32" font-family="Times,serif" font-size="8.00" fill="#ffffff">bthread::execution_queue_start</text>
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<!-- bthread_execution_queue_start_anno -->
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<title>bthread_execution_queue_start_anno</title>
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<text text-anchor="middle" x="889" y="-653.19" font-family="Times,serif" font-size="8.00" fill="#ffffff">create an exec queue</text>
<text text-anchor="middle" x="889" y="-644.19" font-family="Times,serif" font-size="8.00" fill="#ffffff">and return the queue id as output param</text>
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<!-- bthread_execution_queue_start&#45;&gt;bthread_execution_queue_start_anno -->
<g id="edge2" class="edge">
<title>bthread_execution_queue_start&#45;&gt;bthread_execution_queue_start_anno</title>
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<!-- ExecutionQueue_create -->
<g id="node3" class="node">
<title>ExecutionQueue_create</title>
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<text text-anchor="middle" x="745" y="-648.69" font-family="Times,serif" font-size="8.00" fill="#ffffff">ExecutionQueue::create</text>
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<!-- bthread_execution_queue_start&#45;&gt;ExecutionQueue_create -->
<g id="edge1" class="edge">
<title>bthread_execution_queue_start&#45;&gt;ExecutionQueue_create</title>
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<!-- ExecutionQueueBase_create -->
<g id="node4" class="node">
<title>ExecutionQueueBase_create</title>
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<text text-anchor="middle" x="775" y="-564.06" font-family="Times,serif" font-size="8.00" fill="#ffffff">ExecutionQueueBase::create</text>
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<!-- ExecutionQueue_create&#45;&gt;ExecutionQueueBase_create -->
<g id="edge3" class="edge">
<title>ExecutionQueue_create&#45;&gt;ExecutionQueueBase_create</title>
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<!-- ExecutionQueueBase_create_anno -->
<g id="node5" class="node">
<title>ExecutionQueueBase_create_anno</title>
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<text text-anchor="middle" x="793" y="-469.32" font-family="Times,serif" font-size="8.00" fill="#ffffff">initialize execution queue member vars</text>
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<!-- ExecutionQueueBase_create&#45;&gt;ExecutionQueueBase_create_anno -->
<g id="edge4" class="edge">
<title>ExecutionQueueBase_create&#45;&gt;ExecutionQueueBase_create_anno</title>
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<!-- bthread_execution_queue_execute -->
<g id="node6" class="node">
<title>bthread_execution_queue_execute</title>
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<text text-anchor="middle" x="267" y="-726.32" font-family="Times,serif" font-size="8.00" fill="#ffffff">bthread::execution_queue_execute</text>
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<!-- ExecutionQueue_execute -->
<g id="node7" class="node">
<title>ExecutionQueue_execute</title>
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<text text-anchor="middle" x="267" y="-648.69" font-family="Times,serif" font-size="8.00" fill="#ffffff">ExecutionQueue::execute</text>
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<!-- bthread_execution_queue_execute&#45;&gt;ExecutionQueue_execute -->
<g id="edge5" class="edge">
<title>bthread_execution_queue_execute&#45;&gt;ExecutionQueue_execute</title>
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<!-- ExecutionQueue_allocate_node -->
<g id="node8" class="node">
<title>ExecutionQueue_allocate_node</title>
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<text text-anchor="middle" x="132" y="-564.06" font-family="Times,serif" font-size="8.00" fill="#ffffff">ExecutionQueue::allocate_node</text>
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<g id="edge6" class="edge">
<title>ExecutionQueue_execute&#45;&gt;ExecutionQueue_allocate_node</title>
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<text text-anchor="middle" x="202" y="-604.46" font-family="Times,serif" font-size="7.00">1</text>
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<!-- TaskNode_TaskNode -->
<g id="node9" class="node">
<title>TaskNode_TaskNode</title>
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<text text-anchor="middle" x="267" y="-564.06" font-family="Times,serif" font-size="8.00" fill="#ffffff">TaskNode::TaskNode</text>
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<!-- ExecutionQueue_execute&#45;&gt;TaskNode_TaskNode -->
<g id="edge7" class="edge">
<title>ExecutionQueue_execute&#45;&gt;TaskNode_TaskNode</title>
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<text text-anchor="middle" x="295.5" y="-604.46" font-family="Times,serif" font-size="7.00">2. inplacement new</text>
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<g id="node10" class="node">
<title>ExecutionQueueBase_start_execute</title>
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<text text-anchor="middle" x="410" y="-564.06" font-family="Times,serif" font-size="8.00" fill="#ffffff">ExecutionQueueBase::start_execute</text>
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<!-- ExecutionQueue_execute&#45;&gt;ExecutionQueueBase_start_execute -->
<g id="edge8" class="edge">
<title>ExecutionQueue_execute&#45;&gt;ExecutionQueueBase_start_execute</title>
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<text text-anchor="middle" x="350" y="-604.46" font-family="Times,serif" font-size="7.00">3</text>
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<g id="node11" class="node">
<title>ExecutionQueueBase_exchange_head</title>
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<text text-anchor="middle" x="457" y="-478.32" font-family="Times,serif" font-size="8.00" fill="#ffffff">_head.exchange(node, mo_release)</text>
<text text-anchor="middle" x="457" y="-469.32" font-family="Times,serif" font-size="8.00" fill="#ffffff">//exchange is enough</text>
<text text-anchor="middle" x="457" y="-460.32" font-family="Times,serif" font-size="8.00" fill="#ffffff">becase &amp;_head is unchanged</text>
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<!-- ExecutionQueueBase_start_execute&#45;&gt;ExecutionQueueBase_exchange_head -->
<g id="edge9" class="edge">
<title>ExecutionQueueBase_start_execute&#45;&gt;ExecutionQueueBase_exchange_head</title>
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<text text-anchor="middle" x="473.5" y="-520.46" font-family="Times,serif" font-size="7.00">1. append to head of queue</text>
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<!-- ExecutionQueueBase__execute_tasks -->
<g id="node13" class="node">
<title>ExecutionQueueBase__execute_tasks</title>
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<text text-anchor="middle" x="338" y="-382.57" font-family="Times,serif" font-size="8.00" fill="#ffffff">ExecutionQueueBase::_execute_tasks</text>
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<!-- ExecutionQueueBase_start_execute&#45;&gt;ExecutionQueueBase__execute_tasks -->
<g id="edge19" class="edge">
<title>ExecutionQueueBase_start_execute&#45;&gt;ExecutionQueueBase__execute_tasks</title>
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<text text-anchor="middle" x="130" y="-469.72" font-family="Times,serif" font-size="7.00">6. if failed to run in bthread</text>
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<title>ExecuttonQueeuBase_Start_execute_inplace</title>
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<text text-anchor="middle" x="702" y="-302.57" font-family="Times,serif" font-size="8.00" fill="#ffffff">inpalce execution</text>
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<!-- ExecutionQueueBase_start_execute&#45;&gt;ExecuttonQueeuBase_Start_execute_inplace -->
<g id="edge11" class="edge">
<title>ExecutionQueueBase_start_execute&#45;&gt;ExecuttonQueeuBase_Start_execute_inplace</title>
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<text text-anchor="middle" x="731" y="-422.97" font-family="Times,serif" font-size="7.00">3. if inplace</text>
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<!-- bthread_start_urgent -->
<g id="node17" class="node">
<title>bthread_start_urgent</title>
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<text text-anchor="middle" x="226" y="-469.32" font-family="Times,serif" font-size="8.00" fill="#ffffff">bthread_start_urgent</text>
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<title>ExecutionQueueBase_start_execute&#45;&gt;bthread_start_urgent</title>
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<text text-anchor="middle" x="289.5" y="-520.46" font-family="Times,serif" font-size="7.00">4. if urgent, create bthread and run</text>
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<!-- bthread_start_background -->
<g id="node18" class="node">
<title>bthread_start_background</title>
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<text text-anchor="middle" x="625" y="-469.32" font-family="Times,serif" font-size="8.00" fill="#ffffff">bthread_start_background</text>
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<!-- ExecutionQueueBase_start_execute&#45;&gt;bthread_start_background -->
<g id="edge16" class="edge">
<title>ExecutionQueueBase_start_execute&#45;&gt;bthread_start_background</title>
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<text text-anchor="middle" x="588.5" y="-524.46" font-family="Times,serif" font-size="7.00">5. if !urgent, create bthread</text>
<text text-anchor="middle" x="588.5" y="-516.46" font-family="Times,serif" font-size="7.00">put to bthread queue</text>
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<!-- return; -->
<g id="node26" class="node">
<title>return;</title>
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<text text-anchor="middle" x="319" y="-469.32" font-family="Times,serif" font-size="8.00" fill="#ffffff">return;</text>
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<title>ExecutionQueueBase_start_execute&#45;&gt;return;</title>
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<text text-anchor="middle" x="390" y="-520.46" font-family="Times,serif" font-size="7.00">2. if queue is not empty</text>
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<!-- ExecutionQueueBase__execute -->
<g id="node12" class="node">
<title>ExecutionQueueBase__execute</title>
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<text text-anchor="middle" x="541" y="-207.82" font-family="Times,serif" font-size="8.00" fill="#ffffff">ExecutionQueueBase::_execute</text>
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<!-- ExecuttonQueeuBase__execute_func -->
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<title>ExecuttonQueeuBase__execute_func</title>
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<text text-anchor="middle" x="413" y="-117.18" font-family="Times,serif" font-size="8.00" fill="#ffffff">_execute_func(</text>
<text text-anchor="middle" x="413" y="-108.18" font-family="Times,serif" font-size="8.00" fill="#ffffff">_meta, _type_specific_function, iter)</text>
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<!-- ExecutionQueueBase__execute&#45;&gt;ExecuttonQueeuBase__execute_func -->
<g id="edge20" class="edge">
<title>ExecutionQueueBase__execute&#45;&gt;ExecuttonQueeuBase__execute_func</title>
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<text text-anchor="middle" x="448" y="-161.47" font-family="Times,serif" font-size="7.00">1. if head != NULL &amp;&amp; head&#45;&gt;stop_task</text>
<text text-anchor="middle" x="448" y="-153.47" font-family="Times,serif" font-size="7.00">execute head task and return ESTOP</text>
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<!-- ExecutionQueueBase__execute&#45;&gt;ExecuttonQueeuBase__execute_func -->
<g id="edge23" class="edge">
<title>ExecutionQueueBase__execute&#45;&gt;ExecuttonQueeuBase__execute_func</title>
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<text text-anchor="middle" x="539.5" y="-157.47" font-family="Times,serif" font-size="7.00">3. if iter valid</text>
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<!-- TaskIteratorBase_TaskIteratorBase -->
<g id="node22" class="node">
<title>TaskIteratorBase_TaskIteratorBase</title>
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<text text-anchor="middle" x="226" y="-112.68" font-family="Times,serif" font-size="8.00" fill="#ffffff">TaskIteratorBase::TaskIteratorBase</text>
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<!-- ExecutionQueueBase__execute&#45;&gt;TaskIteratorBase_TaskIteratorBase -->
<g id="edge22" class="edge">
<title>ExecutionQueueBase__execute&#45;&gt;TaskIteratorBase_TaskIteratorBase</title>
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<text text-anchor="middle" x="332.5" y="-157.47" font-family="Times,serif" font-size="7.00">2. create a task iterator for excution</text>
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<g id="node14" class="node">
<title>ExecutionQueueBase__execute_tasks_anno</title>
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<text text-anchor="middle" x="521" y="-302.57" font-family="Times,serif" font-size="8.00" fill="#ffffff">contains a loop that keeps the queue running</text>
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<g id="edge34" class="edge">
<title>ExecutionQueueBase__execute_tasks&#45;&gt;ExecutionQueueBase__execute_tasks_anno</title>
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<!-- ExecutionQueueBase__execute_tasks_loop -->
<g id="node25" class="node">
<title>ExecutionQueueBase__execute_tasks_loop</title>
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<text text-anchor="middle" x="292" y="-302.57" font-family="Times,serif" font-size="8.00" fill="#ffffff">execute tasks loop</text>
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<g id="edge27" class="edge">
<title>ExecutionQueueBase__execute_tasks&#45;&gt;ExecutionQueueBase__execute_tasks_loop</title>
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<text text-anchor="middle" x="319" y="-342.97" font-family="Times,serif" font-size="7.00">1</text>
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<!-- ExecutionQueueBase__execute_tasks_destroy -->
<g id="node31" class="node">
<title>ExecutionQueueBase__execute_tasks_destroy</title>
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<text text-anchor="middle" x="388" y="-302.57" font-family="Times,serif" font-size="8.00" fill="#ffffff">destroy queue</text>
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<title>ExecutionQueueBase__execute_tasks&#45;&gt;ExecutionQueueBase__execute_tasks_destroy</title>
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<text text-anchor="middle" x="425" y="-342.97" font-family="Times,serif" font-size="7.00">2. if it found queue stopped when looping</text>
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<!-- ExecutionQueueBase_return_task_node -->
<g id="node15" class="node">
<title>ExecutionQueueBase_return_task_node</title>
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<text text-anchor="middle" x="878" y="-207.82" font-family="Times,serif" font-size="8.00" fill="#ffffff">ExecutionQueueBase::return_task_node</text>
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<!-- ExecuttonQueeuBase_Start_execute_inplace&#45;&gt;ExecutionQueueBase__execute -->
<g id="edge12" class="edge">
<title>ExecuttonQueeuBase_Start_execute_inplace&#45;&gt;ExecutionQueueBase__execute</title>
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<text text-anchor="middle" x="666" y="-258.97" font-family="Times,serif" font-size="7.00">1. execute directly</text>
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<!-- ExecuttonQueeuBase_Start_execute_inplace&#45;&gt;ExecutionQueueBase_return_task_node -->
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<title>ExecuttonQueeuBase_Start_execute_inplace&#45;&gt;ExecutionQueueBase_return_task_node</title>
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<text text-anchor="middle" x="831.5" y="-262.97" font-family="Times,serif" font-size="7.00">3 if there is no more tasks</text>
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<!-- ExecutionQueueBase__more_tasks -->
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<title>ExecutionQueueBase__more_tasks</title>
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<text text-anchor="middle" x="702" y="-207.82" font-family="Times,serif" font-size="8.00" fill="#ffffff">ExecutionQueueBase::_more_tasks</text>
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<title>ExecuttonQueeuBase_Start_execute_inplace&#45;&gt;ExecutionQueueBase__more_tasks</title>
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<title>bthread_start_urgent&#45;&gt;ExecutionQueueBase__execute_tasks</title>
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<title>bthread_start_background&#45;&gt;ExecutionQueueBase__execute_tasks</title>
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<title>ExecutionQueueBase__more_tasks_new_head</title>
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<text text-anchor="middle" x="707" y="-112.68" font-family="Times,serif" font-size="8.00" fill="#ffffff">_head.compare_exchange_strong(new_head, desired)</text>
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<title>ExecutionQueueBase__more_tasks&#45;&gt;ExecutionQueueBase__more_tasks_new_head</title>
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<text text-anchor="middle" x="708" y="-157.47" font-family="Times,serif" font-size="7.00">1.</text>
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<g id="node24" class="node">
<title>ExecutionQueueBase__more_tasks_reverse_queue</title>
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<text text-anchor="middle" x="897" y="-112.68" font-family="Times,serif" font-size="8.00" fill="#ffffff">reverse the partial exec queue</text>
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<title>ExecutionQueueBase__more_tasks&#45;&gt;ExecutionQueueBase__more_tasks_reverse_queue</title>
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<text text-anchor="middle" x="825" y="-157.47" font-family="Times,serif" font-size="7.00">3.</text>
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<g id="node27" class="node">
<title>return</title>
<ellipse fill="#555555" stroke="#555555" cx="554" cy="-115.38" rx="27" ry="18"/>
<text text-anchor="middle" x="554" y="-112.68" font-family="Times,serif" font-size="8.00" fill="#ffffff">return</text>
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<g id="edge25" class="edge">
<title>ExecutionQueueBase__more_tasks&#45;&gt;return</title>
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<text text-anchor="middle" x="647" y="-161.47" font-family="Times,serif" font-size="7.00">2. if exchange failed</text>
<text text-anchor="middle" x="647" y="-153.47" font-family="Times,serif" font-size="7.00">no new nodes appended to the _head</text>
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<!-- after_old_head -->
<g id="node50" class="node">
<title>after_old_head</title>
<ellipse fill="darkgreen" stroke="darkgreen" cx="1454" cy="-651.39" rx="45.73" ry="18"/>
<text text-anchor="middle" x="1454" y="-646.79" font-family="Times,serif" font-size="14.00" fill="#ffffff">old_head</text>
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<title>ExecutionQueueBase__more_tasks&#45;&gt;after_old_head</title>
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<g id="node21" class="node">
<title>ExecuttonQueeuBase__execute_func_anno</title>
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<text text-anchor="middle" x="413" y="-48.8" font-family="Times,serif" font-size="8.00" fill="#ffffff">this is the user function</text>
<text text-anchor="middle" x="413" y="-39.8" font-family="Times,serif" font-size="8.00" fill="#ffffff">user function must iterate all the TaskNodes to execute</text>
<text text-anchor="middle" x="413" y="-30.8" font-family="Times,serif" font-size="8.00" fill="#ffffff">if not iterated there may be some tasks not excuted</text>
<text text-anchor="middle" x="413" y="-21.8" font-family="Times,serif" font-size="8.00" fill="#ffffff">this is bad because the user logic couples with the queue&#39;s</text>
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<g id="edge21" class="edge">
<title>ExecuttonQueeuBase__execute_func&#45;&gt;ExecuttonQueeuBase__execute_func_anno</title>
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<!-- ExecuttonQueeuBase__execute_func_anno&#45;&gt;after_old_head -->
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<title>ExecuttonQueeuBase__execute_func_anno&#45;&gt;after_old_head</title>
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<g id="edge29" class="edge">
<title>ExecutionQueueBase__execute_tasks_loop&#45;&gt;ExecutionQueueBase__execute</title>
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<text text-anchor="middle" x="472" y="-262.97" font-family="Times,serif" font-size="7.00" fill="red">2. run current node</text>
<text text-anchor="middle" x="472" y="-254.97" font-family="Times,serif" font-size="7.00" fill="red">with corresponding priority</text>
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<title>ExecutionQueueBase__execute_tasks_loop&#45;&gt;ExecutionQueueBase__more_tasks</title>
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<text text-anchor="middle" x="578" y="-262.97" font-family="Times,serif" font-size="7.00">5. find more tasks to run</text>
<text text-anchor="middle" x="578" y="-254.97" font-family="Times,serif" font-size="7.00">get </text>
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<!-- ExecutionQueueBase__execute_tasks_loop_release -->
<g id="node28" class="node">
<title>ExecutionQueueBase__execute_tasks_loop_release</title>
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<text text-anchor="middle" x="250" y="-207.82" font-family="Times,serif" font-size="8.00" fill="#ffffff">release memory of task node</text>
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<g id="edge28" class="edge">
<title>ExecutionQueueBase__execute_tasks_loop&#45;&gt;ExecutionQueueBase__execute_tasks_loop_release</title>
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<text text-anchor="middle" x="290" y="-258.97" font-family="Times,serif" font-size="7.00">1. if current node executed</text>
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<g id="node29" class="node">
<title>ExecutionQueueBase__execute_tasks_loop_find_tail</title>
<ellipse fill="red" stroke="red" cx="393" cy="-210.52" rx="62.29" ry="18"/>
<text text-anchor="middle" x="393" y="-207.82" font-family="Times,serif" font-size="8.00" fill="#ffffff">find current tail for reversing</text>
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<!-- ExecutionQueueBase__execute_tasks_loop&#45;&gt;ExecutionQueueBase__execute_tasks_loop_find_tail -->
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<title>ExecutionQueueBase__execute_tasks_loop&#45;&gt;ExecutionQueueBase__execute_tasks_loop_find_tail</title>
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<text text-anchor="middle" x="375" y="-258.97" font-family="Times,serif" font-size="7.00">4. if cur_tail == null</text>
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<!-- ExecutionQueueBase__execute_tasks_loop_refresh_cur_head -->
<g id="node30" class="node">
<title>ExecutionQueueBase__execute_tasks_loop_refresh_cur_head</title>
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<text text-anchor="middle" x="93" y="-216.82" font-family="Times,serif" font-size="8.00" fill="#ffffff">Release TaskNode until</text>
<text text-anchor="middle" x="93" y="-207.82" font-family="Times,serif" font-size="8.00" fill="#ffffff">uniterated task or last task</text>
<text text-anchor="middle" x="93" y="-198.82" font-family="Times,serif" font-size="8.00" fill="#ffffff">refresh cur head for next run</text>
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<g id="edge30" class="edge">
<title>ExecutionQueueBase__execute_tasks_loop&#45;&gt;ExecutionQueueBase__execute_tasks_loop_refresh_cur_head</title>
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<text text-anchor="middle" x="219" y="-258.97" font-family="Times,serif" font-size="7.00">3</text>
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<g id="node32" class="node">
<title>before9</title>
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<text text-anchor="middle" x="1551" y="-724.42" font-family="Times,serif" font-size="14.00" fill="#ffffff">9</text>
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<g id="node33" class="node">
<title>before8</title>
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<!-- before9&#45;&gt;before8 -->
<g id="edge36" class="edge">
<title>before9&#45;&gt;before8</title>
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<!-- before__head -->
<g id="node41" class="node">
<title>before__head</title>
<ellipse fill="darkgreen" stroke="darkgreen" cx="1558" cy="-651.39" rx="34.42" ry="18"/>
<text text-anchor="middle" x="1558" y="-646.79" font-family="Times,serif" font-size="14.00" fill="#ffffff">_head</text>
</g>
<!-- before9&#45;&gt;before__head -->
<g id="edge41" class="edge">
<title>before9&#45;&gt;before__head</title>
<path fill="none" stroke="black" d="M1553.54,-700.58C1554.5,-690.19 1555.57,-678.66 1556.42,-669.49"/>
<polygon fill="black" stroke="black" points="1550.03,-700.58 1552.59,-710.86 1557,-701.22 1550.03,-700.58"/>
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<!-- before7 -->
<g id="node34" class="node">
<title>before7</title>
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<text text-anchor="middle" x="1731" y="-724.42" font-family="Times,serif" font-size="14.00" fill="#ffffff">7</text>
</g>
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<g id="edge37" class="edge">
<title>before8&#45;&gt;before7</title>
<path fill="none" stroke="black" d="M1668.07,-729.02C1676.67,-729.02 1685.27,-729.02 1693.87,-729.02"/>
<polygon fill="black" stroke="black" points="1693.96,-732.52 1703.96,-729.02 1693.96,-725.52 1693.96,-732.52"/>
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<!-- before6 -->
<g id="node35" class="node">
<title>before6</title>
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<text text-anchor="middle" x="1821" y="-724.42" font-family="Times,serif" font-size="14.00" fill="#ffffff">6</text>
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<!-- before7&#45;&gt;before6 -->
<g id="edge38" class="edge">
<title>before7&#45;&gt;before6</title>
<path fill="none" stroke="black" d="M1758.07,-729.02C1766.67,-729.02 1775.27,-729.02 1783.87,-729.02"/>
<polygon fill="black" stroke="black" points="1783.96,-732.52 1793.96,-729.02 1783.96,-725.52 1783.96,-732.52"/>
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<!-- before_new_head -->
<g id="node39" class="node">
<title>before_new_head</title>
<ellipse fill="darkgreen" stroke="darkgreen" cx="1670" cy="-651.39" rx="49.78" ry="18"/>
<text text-anchor="middle" x="1670" y="-646.79" font-family="Times,serif" font-size="14.00" fill="#ffffff">new_head</text>
</g>
<!-- before7&#45;&gt;before_new_head -->
<g id="edge42" class="edge">
<title>before7&#45;&gt;before_new_head</title>
<path fill="none" stroke="black" d="M1710.88,-703.07C1701.84,-691.87 1691.42,-678.95 1683.37,-668.97"/>
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<!-- before5 -->
<g id="node36" class="node">
<title>before5</title>
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<text text-anchor="middle" x="1911" y="-724.42" font-family="Times,serif" font-size="14.00" fill="#ffffff">5</text>
</g>
<!-- before6&#45;&gt;before5 -->
<g id="edge39" class="edge">
<title>before6&#45;&gt;before5</title>
<path fill="none" stroke="black" d="M1848.07,-729.02C1856.67,-729.02 1865.27,-729.02 1873.87,-729.02"/>
<polygon fill="black" stroke="black" points="1873.96,-732.52 1883.96,-729.02 1873.96,-725.52 1873.96,-732.52"/>
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<!-- before_null -->
<g id="node37" class="node">
<title>before_null</title>
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<text text-anchor="middle" x="2001" y="-724.42" font-family="Times,serif" font-size="14.00" fill="#ffffff">null</text>
</g>
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<g id="edge40" class="edge">
<title>before5&#45;&gt;before_null</title>
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<g id="node40" class="node">
<title>before_old_head</title>
<ellipse fill="darkgreen" stroke="darkgreen" cx="1783" cy="-651.39" rx="45.73" ry="18"/>
<text text-anchor="middle" x="1783" y="-646.79" font-family="Times,serif" font-size="14.00" fill="#ffffff">old_head</text>
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<!-- before5&#45;&gt;before_old_head -->
<g id="edge43" class="edge">
<title>before5&#45;&gt;before_old_head</title>
<path fill="none" stroke="black" d="M1874.98,-706.74C1853.43,-694.01 1826.62,-678.16 1807.51,-666.87"/>
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<g id="node38" class="node">
<title>before_tail_anno</title>
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<text text-anchor="middle" x="1937" y="-657.69" font-family="Times,serif" font-size="8.00" fill="#ffffff">there must be NULL when it checks for more tasks</text>
<text text-anchor="middle" x="1937" y="-648.69" font-family="Times,serif" font-size="8.00" fill="#ffffff">because when it comes to old_head for execution</text>
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<!-- before_null&#45;&gt;before_tail_anno -->
<g id="edge35" class="edge">
<title>before_null&#45;&gt;before_tail_anno</title>
<path fill="none" stroke="black" stroke-dasharray="5,2" d="M1986.48,-710.86C1976,-698.48 1961.93,-681.85 1951.47,-669.49"/>
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<!-- after9 -->
<g id="node42" class="node">
<title>after9</title>
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<text text-anchor="middle" x="1037" y="-724.42" font-family="Times,serif" font-size="14.00" fill="#ffffff">9</text>
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<!-- after8 -->
<g id="node43" class="node">
<title>after8</title>
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<text text-anchor="middle" x="1133" y="-724.42" font-family="Times,serif" font-size="14.00" fill="#ffffff">8</text>
</g>
<!-- after9&#45;&gt;after8 -->
<g id="edge44" class="edge">
<title>after9&#45;&gt;after8</title>
<path fill="none" stroke="black" d="M1064.38,-729.02C1074.87,-729.02 1085.37,-729.02 1095.86,-729.02"/>
<polygon fill="black" stroke="black" points="1095.93,-732.52 1105.93,-729.02 1095.93,-725.52 1095.93,-732.52"/>
</g>
<!-- after__head -->
<g id="node51" class="node">
<title>after__head</title>
<ellipse fill="darkgreen" stroke="darkgreen" cx="1019" cy="-651.39" rx="34.42" ry="18"/>
<text text-anchor="middle" x="1019" y="-646.79" font-family="Times,serif" font-size="14.00" fill="#ffffff">_head</text>
</g>
<!-- after9&#45;&gt;after__head -->
<g id="edge49" class="edge">
<title>after9&#45;&gt;after__head</title>
<path fill="none" stroke="black" d="M1030.55,-700.91C1028.05,-690.43 1025.27,-678.76 1023.07,-669.49"/>
<polygon fill="black" stroke="black" points="1027.2,-701.94 1032.92,-710.86 1034,-700.32 1027.2,-701.94"/>
</g>
<!-- after7 -->
<g id="node44" class="node">
<title>after7</title>
<polygon fill="blue" stroke="blue" points="1273,-747.02 1219,-747.02 1219,-711.02 1273,-711.02 1273,-747.02"/>
<text text-anchor="middle" x="1246" y="-724.42" font-family="Times,serif" font-size="14.00" fill="#ffffff">7</text>
</g>
<!-- after8&#45;&gt;after7 -->
<g id="edge45" class="edge">
<title>after8&#45;&gt;after7</title>
<path fill="none" stroke="black" d="M1160.37,-729.02C1176.53,-729.02 1192.69,-729.02 1208.84,-729.02"/>
<polygon fill="black" stroke="black" points="1208.91,-732.52 1218.91,-729.02 1208.91,-725.52 1208.91,-732.52"/>
</g>
<!-- after6 -->
<g id="node45" class="node">
<title>after6</title>
<polygon fill="blue" stroke="blue" points="1377,-747.02 1323,-747.02 1323,-711.02 1377,-711.02 1377,-747.02"/>
<text text-anchor="middle" x="1350" y="-724.42" font-family="Times,serif" font-size="14.00" fill="#ffffff">6</text>
</g>
<!-- after7&#45;&gt;after6 -->
<g id="edge46" class="edge">
<title>after7&#45;&gt;after6</title>
<path fill="none" stroke="black" d="M1283.27,-729.02C1296.42,-729.02 1309.56,-729.02 1322.71,-729.02"/>
<polygon fill="black" stroke="black" points="1283.22,-725.52 1273.22,-729.02 1283.22,-732.52 1283.22,-725.52"/>
</g>
<!-- after_null -->
<g id="node47" class="node">
<title>after_null</title>
<polygon fill="blue" stroke="blue" points="1273,-669.39 1219,-669.39 1219,-633.39 1273,-633.39 1273,-669.39"/>
<text text-anchor="middle" x="1246" y="-646.79" font-family="Times,serif" font-size="14.00" fill="#ffffff">null</text>
</g>
<!-- after7&#45;&gt;after_null -->
<g id="edge48" class="edge">
<title>after7&#45;&gt;after_null</title>
<path fill="none" stroke="black" d="M1246,-710.86C1246,-701.67 1246,-690.14 1246,-679.75"/>
<polygon fill="black" stroke="black" points="1249.5,-679.49 1246,-669.49 1242.5,-679.49 1249.5,-679.49"/>
</g>
<!-- after_new_head -->
<g id="node48" class="node">
<title>after_new_head</title>
<ellipse fill="darkgreen" stroke="darkgreen" cx="1341" cy="-651.39" rx="49.78" ry="18"/>
<text text-anchor="middle" x="1341" y="-646.79" font-family="Times,serif" font-size="14.00" fill="#ffffff">new_head</text>
</g>
<!-- after7&#45;&gt;after_new_head -->
<g id="edge50" class="edge">
<title>after7&#45;&gt;after_new_head</title>
<path fill="none" stroke="black" d="M1275.53,-704.51C1290.49,-692.6 1308.23,-678.48 1321.47,-667.94"/>
<polygon fill="black" stroke="black" points="1273.2,-701.89 1267.56,-710.86 1277.56,-707.37 1273.2,-701.89"/>
</g>
<!-- after_new_tail -->
<g id="node49" class="node">
<title>after_new_tail</title>
<ellipse fill="darkgreen" stroke="darkgreen" cx="1136" cy="-651.39" rx="65.11" ry="22.76"/>
<text text-anchor="middle" x="1136" y="-654.39" font-family="Times,serif" font-size="10.00" fill="#ffffff">new_tail</text>
<text text-anchor="middle" x="1136" y="-642.39" font-family="Times,serif" font-size="10.00" fill="#ffffff">(as next old_head)</text>
</g>
<!-- after7&#45;&gt;after_new_tail -->
<g id="edge51" class="edge">
<title>after7&#45;&gt;after_new_tail</title>
<path fill="none" stroke="black" d="M1212.78,-705.18C1197.33,-694.56 1179.14,-682.05 1164.35,-671.88"/>
<polygon fill="black" stroke="black" points="1210.82,-708.08 1221.04,-710.86 1214.78,-702.31 1210.82,-708.08"/>
</g>
<!-- after5 -->
<g id="node46" class="node">
<title>after5</title>
<polygon fill="blue" stroke="blue" points="1474,-747.02 1420,-747.02 1420,-711.02 1474,-711.02 1474,-747.02"/>
<text text-anchor="middle" x="1447" y="-724.42" font-family="Times,serif" font-size="14.00" fill="#ffffff">5</text>
</g>
<!-- after6&#45;&gt;after5 -->
<g id="edge47" class="edge">
<title>after6&#45;&gt;after5</title>
<path fill="none" stroke="black" d="M1387.57,-729.02C1398.3,-729.02 1409.03,-729.02 1419.77,-729.02"/>
<polygon fill="black" stroke="black" points="1387.28,-725.52 1377.28,-729.02 1387.28,-732.52 1387.28,-725.52"/>
</g>
<!-- after5&#45;&gt;after_old_head -->
<g id="edge52" class="edge">
<title>after5&#45;&gt;after_old_head</title>
<path fill="none" stroke="black" d="M1449.54,-700.58C1450.5,-690.19 1451.57,-678.66 1452.42,-669.49"/>
<polygon fill="black" stroke="black" points="1446.03,-700.58 1448.59,-710.86 1453,-701.22 1446.03,-700.58"/>
</g>
</g>

<!--
Copyright 2019, Gavin Chou, gavineaglechou@gmail.com

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-->

<style>
.node {
  fill: blue;
}
.node:hover {
  fill: lightblue;
}
.fade {
  opacity: 0.2;
}
.fade:hover {
  opacity: 1.0;
}
.arrow-path {
  stroke: blue;
}
.arrow-head-tail {
  fill: blue;
  stroke: blue;
}
</style>

<script xlink:href="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.4.0.min.js"></script>
<script>

// configure to switch hilight effect
const HILIGHT = 1;
const FADE = 2;
var style = HILIGHT;

$(document).ready(function() {
var allNodes = $('.node');
var allEdges = $('.edge');
var allNodeTitles = allNodes.find('title');
var allEdgeTitles = allEdges.find('title');
var nodeAreas = allNodes.find('[fill]'); // including text

nodeAreas.click(function() {
  var nonHiClass = style == FADE ? 'fade' : 'none';
  var hiClass = style == FADE ? 'none' : 'node';
  var arrowPathClass = style == FADE ? 'none' : 'arrow-path';
  var arrowHeadTailClass = style == FADE ? 'none'  : 'arrow-head-tail';
  var arrowTextClass = 'none'; // always remains none;

  // TODO: only nodes and edges, which can be recorded, modified should be
  //       considered
  allNodes.each(function(index) {
    $(this).find('[fill]:not(text)').attr('class', nonHiClass);
  });
  allEdges.each(function(index) {
    $(this).find('*').attr('class', nonHiClass);
  });
  // highlight current node first
  $(this).parent().find('[fill]:not(text)').attr('class', hiClass);
  // console.log($(this).parent());
  // console.log(title);
  var highlight = function(title) {
    // for all adj, Node
    allEdgeTitles.each(function(index) {
      // console.log($(this).text());
      var arrow = $(this).text().split('->'); // &#45;&gt;
      if (!(arrow[0] === title || arrow[1] === title)) {
        return;
      }
      // TODO: compare nodes that arrow heads attatched to
      $(this).parent().find('path').attr('class', arrowPathClass);
      $(this).parent().find('polygon').attr('class', arrowHeadTailClass);
      $(this).parent().find('text').attr('class', 'arrowTextClass');
      // console.log(arrow);
      allNodeTitles.each(function(index) {
        // process parent node only
        if (!($(this).text() === arrow[0])) {
          return;
        }
        if ($(this).parent().find('[fill]').attr('class') === hiClass) {
          return;
        }
        $(this).parent().find('[fill]:not(text)').attr('class', hiClass);
        highlight(arrow[0]);
      });
    });
  };
  var clickedTitle = $(this).parent().find('title').text();
  highlight(clickedTitle);
});

});
</script>
<!--
vim: et ts=2 sw=2 ft=javascript:
-->
</svg>