ref: bc5fa81066e329051e2d320be755fc145fe548f3
dir: /codec/common/src/WelsThreadPool.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 "typedefs.h"
#include "memory_align.h"
#include "WelsThreadPool.h"
namespace WelsCommon {
int32_t CWelsThreadPool::m_iRefCount = 0;
CWelsLock CWelsThreadPool::m_cInitLock;
int32_t CWelsThreadPool::m_iMaxThreadNum = DEFAULT_THREAD_NUM;
CWelsThreadPool::CWelsThreadPool() :
m_cWaitedTasks (NULL), m_cIdleThreads (NULL), m_cBusyThreads (NULL) {
}
CWelsThreadPool::~CWelsThreadPool() {
//fprintf(stdout, "CWelsThreadPool::~CWelsThreadPool: delete %x, %x, %x\n", m_cWaitedTasks, m_cIdleThreads, m_cBusyThreads);
if (0 != m_iRefCount) {
m_iRefCount = 0;
Uninit();
}
}
WELS_THREAD_ERROR_CODE CWelsThreadPool::SetThreadNum (int32_t iMaxThreadNum) {
CWelsAutoLock cLock (m_cInitLock);
if (m_iRefCount != 0) {
return WELS_THREAD_ERROR_GENERAL;
}
if (iMaxThreadNum <= 0) {
iMaxThreadNum = 1;
}
m_iMaxThreadNum = iMaxThreadNum;
return WELS_THREAD_ERROR_OK;
}
CWelsThreadPool& CWelsThreadPool::AddReference () {
CWelsAutoLock cLock (m_cInitLock);
static CWelsThreadPool m_cThreadPoolSelf;
if (m_iRefCount == 0) {
//TODO: will remove this afterwards
if (WELS_THREAD_ERROR_OK != m_cThreadPoolSelf.Init()) {
m_cThreadPoolSelf.Uninit();
}
}
//fprintf(stdout, "m_iRefCount=%d, pSink=%x, iMaxThreadNum=%d\n", m_iRefCount, pSink, iMaxThreadNum);
++ m_iRefCount;
//fprintf(stdout, "m_iRefCount2=%d\n", m_iRefCount);
return m_cThreadPoolSelf;
}
void CWelsThreadPool::RemoveInstance() {
CWelsAutoLock cLock (m_cInitLock);
//fprintf(stdout, "m_iRefCount=%d\n", m_iRefCount);
-- m_iRefCount;
if (0 == m_iRefCount) {
StopAllRunning();
Uninit();
//fprintf(stdout, "m_iRefCount=%d, IdleThreadNum=%d, BusyThreadNum=%d, WaitedTask=%d\n", m_iRefCount, GetIdleThreadNum(), GetBusyThreadNum(), GetWaitedTaskNum());
}
}
bool CWelsThreadPool::IsReferenced() {
CWelsAutoLock cLock (m_cInitLock);
return (m_iRefCount>0);
}
WELS_THREAD_ERROR_CODE CWelsThreadPool::OnTaskStart (CWelsTaskThread* pThread, IWelsTask* pTask) {
AddThreadToBusyList (pThread);
//fprintf(stdout, "CWelsThreadPool::AddThreadToBusyList: Task %x at Thread %x\n", pTask, pThread);
return WELS_THREAD_ERROR_OK;
}
WELS_THREAD_ERROR_CODE CWelsThreadPool::OnTaskStop (CWelsTaskThread* pThread, IWelsTask* pTask) {
//fprintf(stdout, "CWelsThreadPool::OnTaskStop 0: Task %x at Thread %x Finished\n", pTask, pThread);
RemoveThreadFromBusyList (pThread);
AddThreadToIdleQueue (pThread);
//fprintf(stdout, "CWelsThreadPool::OnTaskStop 1: Task %x at Thread %x Finished, m_pSink=%x\n", pTask, pThread, m_pSink);
if (pTask->GetSink()) {
pTask->GetSink()->OnTaskExecuted();
}
//if (m_pSink) {
// m_pSink->OnTaskExecuted (pTask);
//}
//fprintf(stdout, "CWelsThreadPool::OnTaskStop 2: Task %x at Thread %x Finished\n", pTask, pThread);
SignalThread();
//fprintf(stdout, "ThreadPool: Task %x at Thread %x Finished\n", pTask, pThread);
return WELS_THREAD_ERROR_OK;
}
WELS_THREAD_ERROR_CODE CWelsThreadPool::Init () {
//fprintf(stdout, "Enter WelsThreadPool Init\n");
CWelsAutoLock cLock (m_cLockPool);
m_cWaitedTasks = new CWelsCircleQueue<IWelsTask>();
m_cIdleThreads = new CWelsCircleQueue<CWelsTaskThread>();
m_cBusyThreads = new CWelsList<CWelsTaskThread>();
if (NULL == m_cWaitedTasks || NULL == m_cIdleThreads || NULL == m_cBusyThreads) {
return WELS_THREAD_ERROR_GENERAL;
}
for (int32_t i = 0; i < m_iMaxThreadNum; i++) {
if (WELS_THREAD_ERROR_OK != CreateIdleThread()) {
return WELS_THREAD_ERROR_GENERAL;
}
}
if (WELS_THREAD_ERROR_OK != Start()) {
return WELS_THREAD_ERROR_GENERAL;
}
return WELS_THREAD_ERROR_OK;
}
WELS_THREAD_ERROR_CODE CWelsThreadPool::StopAllRunning() {
WELS_THREAD_ERROR_CODE iReturn = WELS_THREAD_ERROR_OK;
ClearWaitedTasks();
while (GetBusyThreadNum() > 0) {
//WELS_INFO_TRACE ("CWelsThreadPool::Uninit - Waiting all thread to exit");
WelsSleep (10);
}
if (GetIdleThreadNum() != m_iMaxThreadNum) {
iReturn = WELS_THREAD_ERROR_GENERAL;
}
return iReturn;
}
WELS_THREAD_ERROR_CODE CWelsThreadPool::Uninit() {
WELS_THREAD_ERROR_CODE iReturn = WELS_THREAD_ERROR_OK;
CWelsAutoLock cLock (m_cLockPool);
iReturn = StopAllRunning();
if (WELS_THREAD_ERROR_OK != iReturn) {
return iReturn;
}
m_cLockIdleTasks.Lock();
while (m_cIdleThreads->size() > 0) {
DestroyThread (m_cIdleThreads->begin());
m_cIdleThreads->pop_front();
}
m_cLockIdleTasks.Unlock();
Kill();
WELS_DELETE_OP(m_cWaitedTasks);
WELS_DELETE_OP(m_cIdleThreads);
WELS_DELETE_OP(m_cBusyThreads);
return iReturn;
}
void CWelsThreadPool::ExecuteTask() {
//fprintf(stdout, "ThreadPool: scheduled tasks: ExecuteTask\n");
CWelsTaskThread* pThread = NULL;
IWelsTask* pTask = NULL;
while (GetWaitedTaskNum() > 0) {
pThread = GetIdleThread();
if (pThread == NULL) {
break;
}
pTask = GetWaitedTask();
//fprintf(stdout, "ThreadPool: ExecuteTask = %x at thread %x\n", pTask, pThread);
pThread->SetTask (pTask);
}
}
WELS_THREAD_ERROR_CODE CWelsThreadPool::QueueTask (IWelsTask* pTask) {
CWelsAutoLock cLock (m_cLockPool);
//fprintf(stdout, "CWelsThreadPool::QueueTask: %d, pTask=%x\n", m_iRefCount, pTask);
if (GetWaitedTaskNum() == 0) {
CWelsTaskThread* pThread = GetIdleThread();
if (pThread != NULL) {
//fprintf(stdout, "ThreadPool: ExecuteTask = %x at thread %x\n", pTask, pThread);
pThread->SetTask (pTask);
return WELS_THREAD_ERROR_OK;
}
}
//fprintf(stdout, "ThreadPool: AddTaskToWaitedList: %x\n", pTask);
AddTaskToWaitedList (pTask);
//fprintf(stdout, "ThreadPool: SignalThread: %x\n", pTask);
SignalThread();
return WELS_THREAD_ERROR_OK;
}
WELS_THREAD_ERROR_CODE CWelsThreadPool::CreateIdleThread() {
CWelsTaskThread* pThread = new CWelsTaskThread (this);
if (NULL == pThread) {
return WELS_THREAD_ERROR_GENERAL;
}
if (WELS_THREAD_ERROR_OK != pThread->Start()) {
return WELS_THREAD_ERROR_GENERAL;
}
//fprintf(stdout, "ThreadPool: AddThreadToIdleQueue: %x\n", pThread);
AddThreadToIdleQueue (pThread);
return WELS_THREAD_ERROR_OK;
}
void CWelsThreadPool::DestroyThread (CWelsTaskThread* pThread) {
pThread->Kill();
WELS_DELETE_OP(pThread);
return;
}
WELS_THREAD_ERROR_CODE CWelsThreadPool::AddThreadToIdleQueue (CWelsTaskThread* pThread) {
CWelsAutoLock cLock (m_cLockIdleTasks);
m_cIdleThreads->push_back (pThread);
return WELS_THREAD_ERROR_OK;
}
WELS_THREAD_ERROR_CODE CWelsThreadPool::AddThreadToBusyList (CWelsTaskThread* pThread) {
CWelsAutoLock cLock (m_cLockBusyTasks);
m_cBusyThreads->push_back (pThread);
return WELS_THREAD_ERROR_OK;
}
WELS_THREAD_ERROR_CODE CWelsThreadPool::RemoveThreadFromBusyList (CWelsTaskThread* pThread) {
CWelsAutoLock cLock (m_cLockBusyTasks);
if (m_cBusyThreads->erase (pThread)) {
return WELS_THREAD_ERROR_OK;
} else {
return WELS_THREAD_ERROR_GENERAL;
}
}
void CWelsThreadPool::AddTaskToWaitedList (IWelsTask* pTask) {
CWelsAutoLock cLock (m_cLockWaitedTasks);
m_cWaitedTasks->push_back (pTask);
//fprintf(stdout, "CWelsThreadPool::AddTaskToWaitedList=%d, pTask=%x\n", m_cWaitedTasks->size(), pTask);
return;
}
CWelsTaskThread* CWelsThreadPool::GetIdleThread() {
CWelsAutoLock cLock (m_cLockIdleTasks);
//fprintf(stdout, "CWelsThreadPool::GetIdleThread=%d\n", m_cIdleThreads->size());
if (m_cIdleThreads->size() == 0) {
return NULL;
}
CWelsTaskThread* pThread = m_cIdleThreads->begin();
m_cIdleThreads->pop_front();
return pThread;
}
int32_t CWelsThreadPool::GetBusyThreadNum() {
return m_cBusyThreads->size();
}
int32_t CWelsThreadPool::GetIdleThreadNum() {
return m_cIdleThreads->size();
}
int32_t CWelsThreadPool::GetWaitedTaskNum() {
//fprintf(stdout, "CWelsThreadPool::m_cWaitedTasks=%d\n", m_cWaitedTasks->size());
return m_cWaitedTasks->size();
}
IWelsTask* CWelsThreadPool::GetWaitedTask() {
CWelsAutoLock lock (m_cLockWaitedTasks);
if (m_cWaitedTasks->size() == 0) {
return NULL;
}
IWelsTask* pTask = m_cWaitedTasks->begin();
m_cWaitedTasks->pop_front();
return pTask;
}
void CWelsThreadPool::ClearWaitedTasks() {
CWelsAutoLock cLock (m_cLockWaitedTasks);
IWelsTask* pTask = NULL;
while (0 != m_cWaitedTasks->size()) {
pTask = m_cWaitedTasks->begin();
if (pTask->GetSink()) {
pTask->GetSink()->OnTaskCancelled();
}
m_cWaitedTasks->pop_front();
}
}
}