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ParallelTask.hpp
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ParallelTask.hpp
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/*******************************************************************************
* Copyright (c) 1991, 2020 IBM Corp. and others
*
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which accompanies this
* distribution and is available at https://www.eclipse.org/legal/epl-2.0/
* or the Apache License, Version 2.0 which accompanies this distribution and
* is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* This Source Code may also be made available under the following
* Secondary Licenses when the conditions for such availability set
* forth in the Eclipse Public License, v. 2.0 are satisfied: GNU
* General Public License, version 2 with the GNU Classpath
* Exception [1] and GNU General Public License, version 2 with the
* OpenJDK Assembly Exception [2].
*
* [1] https://www.gnu.org/software/classpath/license.html
* [2] http://openjdk.java.net/legal/assembly-exception.html
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR LicenseRef-GPL-2.0 WITH Assembly-exception
*******************************************************************************/
/**
* @file
* @ingroup GC_Base
*/
#if !defined(PARALLEL_TASK_HPP_)
#define PARALLEL_TASK_HPP_
#include "omr.h"
#include "omrthread.h"
#include "AtomicOperations.hpp"
#include "Task.hpp"
class MM_EnvironmentBase;
/**
* @todo Provide class documentation
* @ingroup GC_Base
*/
class MM_ParallelTask : public MM_Task
{
/*
* Data members
*/
private:
protected:
uint64_t _syncCriticalSectionStartTime; /**< Timestamp taken when a critical section of the task starts execution. */
uint64_t _syncCriticalSectionDuration; /**< The time, in hi-res ticks, it took to execute the lastest critical section. */
bool _synchronized;
const char *_syncPointUniqueId;
uintptr_t _syncPointWorkUnitIndex; /**< The _workUnitIndex of the first thread to sync. All threads should have the same index once sync'ed. */
uintptr_t _totalThreadCount;
volatile uintptr_t _threadCount;
volatile uintptr_t _workUnitIndex;
volatile uintptr_t _synchronizeIndex;
volatile uintptr_t _synchronizeCount;
omrthread_monitor_t _synchronizeMutex;
public:
/*
* Function members
*/
public:
virtual bool handleNextWorkUnit(MM_EnvironmentBase *env);
virtual void synchronizeGCThreads(MM_EnvironmentBase *env, const char *id);
virtual bool synchronizeGCThreadsAndReleaseMain(MM_EnvironmentBase *env, const char *id);
virtual bool synchronizeGCThreadsAndReleaseSingleThread(MM_EnvironmentBase *env, const char *id);
virtual void releaseSynchronizedGCThreads(MM_EnvironmentBase *env);
virtual void synchronizeGCThreads(MM_EnvironmentBase *env, const char *id, uint64_t *stallTime);
virtual bool synchronizeGCThreadsAndReleaseMain(MM_EnvironmentBase *env, const char *id, uint64_t *stallTime);
MMINLINE virtual void setSynchronizeMutex(omrthread_monitor_t synchronizeMutex) { _synchronizeMutex = synchronizeMutex; }
virtual void complete(MM_EnvironmentBase *env);
/**
* @note This should not be called by anyone but Dispatcher or ParallelDispatcher
**/
MMINLINE virtual void setThreadCount(uintptr_t threadCount) {
_threadCount = threadCount;
_totalThreadCount = threadCount;
}
MMINLINE virtual uintptr_t getThreadCount() { return _totalThreadCount; }
MMINLINE virtual void addToNotifyStallTime(MM_EnvironmentBase *env, uint64_t startTime, uint64_t endTime) {}
virtual bool isSynchronized();
/**
* Create a ParallelTask object.
*/
MM_ParallelTask(MM_EnvironmentBase *env, MM_ParallelDispatcher *dispatcher) :
MM_Task(env, dispatcher)
,_syncCriticalSectionStartTime(0)
,_syncCriticalSectionDuration(0)
,_synchronized(false)
,_syncPointUniqueId(NULL)
,_syncPointWorkUnitIndex(0)
,_totalThreadCount(0)
,_threadCount(0)
,_workUnitIndex(0)
,_synchronizeIndex(0)
,_synchronizeCount(0)
,_synchronizeMutex(NULL)
{
_typeId = __FUNCTION__;
}
};
#endif /* PARALLEL_TASK_HPP_ */