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/*************************************************************************** |
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* * |
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* Copyright (C) 2007 - 2020 Christian Schoenebeck * |
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* Copyright (C) 2007 - 2013 Grigor Iliev * |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This program is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the Free Software * |
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, * |
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* MA 02110-1301 USA * |
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***************************************************************************/ |
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|
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#include "WorkerThread.h" |
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|
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#include "Exception.h" |
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|
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namespace LinuxSampler { |
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|
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WorkerThread::WorkerThread() : Thread(true, false, 0, -4) { } |
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|
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void WorkerThread::Execute(Runnable* pJob) { |
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{ |
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LockGuard lock(mutex); |
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queue.push_back(pJob); |
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} |
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StartThread(); // ensure thread is running |
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conditionJobsLeft.Set(true); // wake up thread |
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} |
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|
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// Entry point for the worker thread. |
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int WorkerThread::Main() { |
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|
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#if DEBUG |
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Thread::setNameOfCaller("LSWorker"); |
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#endif |
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|
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while (true) { |
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|
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TestCancel(); |
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|
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// prevent worker thread from being cancelled |
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// (e.g. to prevent deadlocks while holding mutex lock(s)) |
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pushCancelable(false); |
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|
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while (true) { |
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Runnable* pJob; |
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|
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// grab a new job from the queue |
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{ |
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LockGuard lock(mutex); |
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if (queue.empty()) break; |
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|
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pJob = queue.front(); |
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queue.pop_front(); |
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} |
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|
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try { |
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pJob->Run(); |
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} catch (Exception e) { |
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e.PrintMessage(); |
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} catch (...) { |
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std::cerr << "WorkerThread: an exception occured, could not finish the job"; |
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std::cerr << std::endl << std::flush; |
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} |
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|
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delete pJob; |
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} |
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|
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// now allow worker thread being cancelled again |
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// (since all mutexes are now unlocked) |
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popCancelable(); |
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|
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// nothing left to do, sleep until new jobs arrive |
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conditionJobsLeft.WaitIf(false); |
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// reset flag |
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conditionJobsLeft.Set(false); |
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// unlock condition object so it can be turned again by other thread |
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conditionJobsLeft.Unlock(); |
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} |
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return 0; |
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} |
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|
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} // namespace LinuxSampler |