ref: 2e5f1b213478bfe830ad846088d6ad14c1400dd5
dir: /codec/common/src/WelsThread.cpp/
/*! * \copy * Copyright (c) 2009-2015, Cisco Systems * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * * \file WelsThreadPool.cpp * * \brief functions for Thread Pool * * \date 5/09/2012 Created * ************************************************************************************* */ #include "WelsThread.h" namespace WelsCommon { CWelsThread::CWelsThread() : m_hThread (0), m_bRunning (false), m_bEndFlag (false) { WelsEventOpen (&m_hEvent); WelsMutexInit(&m_hMutex); m_iConVar = 1; } CWelsThread::~CWelsThread() { Kill(); WelsEventClose (&m_hEvent); WelsMutexDestroy(&m_hMutex); } void CWelsThread::Thread() { while (true) { WelsEventWait (&m_hEvent,&m_hMutex,m_iConVar); if (GetEndFlag()) { break; } m_iConVar = 1; ExecuteTask();//in ExecuteTask there will be OnTaskStop which opens the potential new Signaling of next run, so the setting of m_iConVar = 1 should be before ExecuteTask() } SetRunning (false); } WELS_THREAD_ERROR_CODE CWelsThread::Start() { #ifndef __APPLE__ if (NULL == m_hEvent) { return WELS_THREAD_ERROR_GENERAL; } #endif if (GetRunning()) { return WELS_THREAD_ERROR_OK; } SetEndFlag (false); WELS_THREAD_ERROR_CODE rc = WelsThreadCreate (&m_hThread, (LPWELS_THREAD_ROUTINE)TheThread, this, 0); if (WELS_THREAD_ERROR_OK != rc) { return rc; } while (!GetRunning()) { WelsSleep (1); } return WELS_THREAD_ERROR_OK; } void CWelsThread::Kill() { if (!GetRunning()) { return; } SetEndFlag (true); WelsEventSignal (&m_hEvent,&m_hMutex,&m_iConVar); WelsThreadJoin (m_hThread); return; } WELS_THREAD_ROUTINE_TYPE CWelsThread::TheThread (void* pParam) { CWelsThread* pThis = static_cast<CWelsThread*> (pParam); pThis->SetRunning (true); pThis->Thread(); WELS_THREAD_ROUTINE_RETURN (NULL); } }