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<p><code>#include &lt;<a class="el" href="thread_8h_source.html">thread.h</a>&gt;</code></p>
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Collaboration diagram for impala::ThreadGroup:</div>
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Public Member Functions</h2></td></tr>
<tr class="memitem:a50ababced6d368e653ac51ad4d6f4bf3"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1ThreadGroup.html#a50ababced6d368e653ac51ad4d6f4bf3">ThreadGroup</a> ()</td></tr>
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<tr class="memitem:af61dffdd8c6c30ca0de61ba0fc9d0a5f"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1ThreadGroup.html#af61dffdd8c6c30ca0de61ba0fc9d0a5f">ThreadGroup</a> (<a class="el" href="classimpala_1_1CgroupsMgr.html">CgroupsMgr</a> *cgroups_mgr, const std::string &amp;cgroup)</td></tr>
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<tr class="memitem:a904906f6e646b111636c937a0d58b4f3"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classimpala_1_1Status.html">Status</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1ThreadGroup.html#a904906f6e646b111636c937a0d58b4f3">AddThread</a> (<a class="el" href="classimpala_1_1Thread.html">Thread</a> *thread)</td></tr>
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<tr class="memitem:a3a126bacbbb2ae42bcb86494287a6a2f"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1ThreadGroup.html#a3a126bacbbb2ae42bcb86494287a6a2f">JoinAll</a> ()</td></tr>
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<tr class="memitem:ad0145811920efe164c7caa768cacb05f"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1ThreadGroup.html#ad0145811920efe164c7caa768cacb05f">SetCgroupsMgr</a> (<a class="el" href="classimpala_1_1CgroupsMgr.html">CgroupsMgr</a> *cgroups_mgr)</td></tr>
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Private Attributes</h2></td></tr>
<tr class="memitem:a0ea17bca3d72c7fd8a2e436d9624d8a8"><td class="memItemLeft" align="right" valign="top">boost::ptr_vector&lt; <a class="el" href="classimpala_1_1Thread.html">Thread</a> &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1ThreadGroup.html#a0ea17bca3d72c7fd8a2e436d9624d8a8">threads_</a></td></tr>
<tr class="memdesc:a0ea17bca3d72c7fd8a2e436d9624d8a8"><td class="mdescLeft">&#160;</td><td class="mdescRight">All the threads grouped by this set. <a href="#a0ea17bca3d72c7fd8a2e436d9624d8a8">More...</a><br/></td></tr>
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<tr class="memitem:a00a391cefdcb4c16771137616e4108c6"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classimpala_1_1CgroupsMgr.html">CgroupsMgr</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1ThreadGroup.html#a00a391cefdcb4c16771137616e4108c6">cgroups_mgr_</a></td></tr>
<tr class="memdesc:a00a391cefdcb4c16771137616e4108c6"><td class="mdescLeft">&#160;</td><td class="mdescRight">Cgroups manager for assigning threads in this group to cgroups. Not owned. <a href="#a00a391cefdcb4c16771137616e4108c6">More...</a><br/></td></tr>
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<tr class="memitem:acfce57487ebcf3dfc26df338c4579ab2"><td class="memItemLeft" align="right" valign="top">std::string&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1ThreadGroup.html#acfce57487ebcf3dfc26df338c4579ab2">cgroup_path_</a></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Utility class to group together a set of threads. A replacement for boost::thread_group. </p>
<p>Definition at line <a class="el" href="thread_8h_source.html#l00161">161</a> of file <a class="el" href="thread_8h_source.html">thread.h</a>.</p>
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<td class="memname">impala::ThreadGroup::ThreadGroup </td>
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<p>Definition at line <a class="el" href="thread_8h_source.html#l00163">163</a> of file <a class="el" href="thread_8h_source.html">thread.h</a>.</p>
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<td class="memname">impala::ThreadGroup::ThreadGroup </td>
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<p>Definition at line <a class="el" href="thread_8h_source.html#l00165">165</a> of file <a class="el" href="thread_8h_source.html">thread.h</a>.</p>
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<h2 class="groupheader">Member Function Documentation</h2>
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<p>Adds a new <a class="el" href="classimpala_1_1Thread.html" title="TODO: Consider allowing fragment IDs as category parameters. ">Thread</a> to this group. The <a class="el" href="classimpala_1_1ThreadGroup.html">ThreadGroup</a> takes ownership of the <a class="el" href="classimpala_1_1Thread.html" title="TODO: Consider allowing fragment IDs as category parameters. ">Thread</a>, and will destroy it when the <a class="el" href="classimpala_1_1ThreadGroup.html">ThreadGroup</a> is destroyed. Threads will linger until that point (even if terminated), however, so callers should be mindful of the cost of placing very many threads in this set. If cgroup_path_ / cgroup_prefix_ are set, the thread will be added to the specified cgroup and an error will be returned if that operation fails. </p>
<p>Definition at line <a class="el" href="thread_8cc_source.html#l00318">318</a> of file <a class="el" href="thread_8cc_source.html">thread.cc</a>.</p>
<p>References <a class="el" href="webserver_8cc_source.html#l00115">impala::OK</a>, and <a class="el" href="status_8h_source.html#l00242">RETURN_IF_ERROR</a>.</p>
<p>Referenced by <a class="el" href="parallel-executor_8cc_source.html#l00026">impala::ParallelExecutor::Exec()</a>, <a class="el" href="disk-io-mgr_8cc_source.html#l00296">impala::DiskIoMgr::Init()</a>, <a class="el" href="thread-pool_8h_source.html#l00043">impala::ThreadPool&lt; TRowBatch * &gt;::ThreadPool()</a>, and <a class="el" href="hdfs-scan-node_8cc_source.html#l00729">impala::HdfsScanNode::ThreadTokenAvailableCb()</a>.</p>
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<p>Waits for all threads to finish. DO NOT call this from a thread inside this set; deadlock will predictably ensue. </p>
<p>Definition at line <a class="el" href="thread_8cc_source.html#l00327">327</a> of file <a class="el" href="thread_8cc_source.html">thread.cc</a>.</p>
<p>References <a class="el" href="thread_8h_source.html#l00102">impala::Thread::Join()</a>.</p>
<p>Referenced by <a class="el" href="hdfs-scan-node_8cc_source.html#l00622">impala::HdfsScanNode::Close()</a>, <a class="el" href="parallel-executor_8cc_source.html#l00026">impala::ParallelExecutor::Exec()</a>, <a class="el" href="thread-pool_8h_source.html#l00092">impala::ThreadPool&lt; TRowBatch * &gt;::Join()</a>, and <a class="el" href="disk-io-mgr_8cc_source.html#l00250">impala::DiskIoMgr::~DiskIoMgr()</a>.</p>
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<p>Assigns all current and future threads to the given cgroup managed by cgroups_mgr_. Must be called after <a class="el" href="classimpala_1_1ThreadGroup.html#ad0145811920efe164c7caa768cacb05f">SetCgroupsMgr()</a> if groups_mgr_ has not been set already. Returns an error if any assignment was not possible, but does not undo previously successful assignments. </p>
<p>Definition at line <a class="el" href="thread_8cc_source.html#l00333">333</a> of file <a class="el" href="thread_8cc_source.html">thread.cc</a>.</p>
<p>References <a class="el" href="webserver_8cc_source.html#l00115">impala::OK</a>, and <a class="el" href="status_8h_source.html#l00242">RETURN_IF_ERROR</a>.</p>
<p>Referenced by <a class="el" href="thread-pool_8h_source.html#l00114">impala::ThreadPool&lt; TRowBatch * &gt;::AssignToCgroup()</a>, and <a class="el" href="hdfs-scan-node_8cc_source.html#l00304">impala::HdfsScanNode::Prepare()</a>.</p>
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<td class="memname">void impala::ThreadGroup::SetCgroupsMgr </td>
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<p>Definition at line <a class="el" href="thread_8h_source.html#l00186">186</a> of file <a class="el" href="thread_8h_source.html">thread.h</a>.</p>
<p>References <a class="el" href="thread_8h_source.html#l00193">cgroups_mgr_</a>.</p>
<p>Referenced by <a class="el" href="hdfs-scan-node_8cc_source.html#l00304">impala::HdfsScanNode::Prepare()</a>.</p>
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<h2 class="groupheader">Member Data Documentation</h2>
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<p>If not empty, every thread added to this group will also be placed in the cgroup_path_ managed by the cgroups_mgr_. </p>
<p>Definition at line <a class="el" href="thread_8h_source.html#l00197">197</a> of file <a class="el" href="thread_8h_source.html">thread.h</a>.</p>
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<td class="memname"><a class="el" href="classimpala_1_1CgroupsMgr.html">CgroupsMgr</a>* impala::ThreadGroup::cgroups_mgr_</td>
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<p>Cgroups manager for assigning threads in this group to cgroups. Not owned. </p>
<p>Definition at line <a class="el" href="thread_8h_source.html#l00193">193</a> of file <a class="el" href="thread_8h_source.html">thread.h</a>.</p>
<p>Referenced by <a class="el" href="thread_8h_source.html#l00186">SetCgroupsMgr()</a>.</p>
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<td class="memname">boost::ptr_vector&lt;<a class="el" href="classimpala_1_1Thread.html">Thread</a>&gt; impala::ThreadGroup::threads_</td>
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<p>All the threads grouped by this set. </p>
<p>Definition at line <a class="el" href="thread_8h_source.html#l00190">190</a> of file <a class="el" href="thread_8h_source.html">thread.h</a>.</p>
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<hr/>The documentation for this class was generated from the following files:<ul>
<li>be/src/util/<a class="el" href="thread_8h_source.html">thread.h</a></li>
<li>be/src/util/<a class="el" href="thread_8cc_source.html">thread.cc</a></li>
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<li class="navelem"><a class="el" href="namespaceimpala.html">impala</a></li><li class="navelem"><a class="el" href="classimpala_1_1ThreadGroup.html">ThreadGroup</a></li>
<li class="footer">Generated on Thu May 7 2015 16:10:51 for Impala by
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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.6 </li>
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