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DefaultTaskScheduler.h
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DefaultTaskScheduler.h
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/******************************************************************************
* SOFA, Simulation Open-Framework Architecture *
* (c) 2006 INRIA, USTL, UJF, CNRS, MGH *
* *
* This program is free software; you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as published by *
* the Free Software Foundation; either version 2.1 of the License, or (at *
* your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, but WITHOUT *
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or *
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License *
* for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
*******************************************************************************
* Authors: The SOFA Team and external contributors (see Authors.txt) *
* *
* Contact information: contact@sofa-framework.org *
******************************************************************************/
#pragma once
#include <sofa/config.h>
#include <sofa/simulation/TaskScheduler.h>
// default
#include <thread>
#include <condition_variable>
#include <memory>
#include <map>
#include <string>
#include <mutex>
#include <atomic>
namespace sofa::simulation
{
class WorkerThread;
class SOFA_SIMULATION_CORE_API DefaultTaskScheduler : public TaskScheduler
{
enum
{
MAX_THREADS = 16,
STACKSIZE = 64 * 1024 /* 64K */,
};
public:
// interface
/**
* Call stop() and start() if not already initialized
* @param nbThread
*/
virtual void init(const unsigned int nbThread = 0) final;
/**
* Wait and destroy worker threads
*/
void stop() final;
WorkerThread* getCurrent();
unsigned int getThreadCount(void) const final { return m_threadCount; }
const char* getCurrentThreadName() override final;
int getCurrentThreadType() override final;
// queue task if there is space, and run it otherwise
bool addTask(Task* task) override final;
void workUntilDone(Task::Status* status) override final;
Task::Allocator* getTaskAllocator() override final;
// factory methods: name, creator function
static const char* name() { return "_default"; }
static DefaultTaskScheduler* create();
private:
bool isInitialized() const { return m_isInitialized; }
bool isClosing() const { return m_isClosing; }
void WaitForWorkersToBeReady();
void wakeUpWorkers();
WorkerThread* getCurrentThread();
WorkerThread* getWorkerThread(const std::thread::id id);
static const std::string _name;
std::map< std::thread::id, WorkerThread*> _threads;
std::atomic<const Task::Status*> m_mainTaskStatus;
void setMainTaskStatus(const Task::Status* mainTaskStatus);
bool testMainTaskStatus(const Task::Status*);
std::mutex m_wakeUpMutex;
std::condition_variable m_wakeUpEvent;
DefaultTaskScheduler();
DefaultTaskScheduler(const DefaultTaskScheduler&) = delete;
~DefaultTaskScheduler() override;
/**
* Create worker threads
* If the number of required threads is 0, the number of threads will be equal to the
* result of GetHardwareThreadsCount()
*
* @param NbThread
*/
void start(unsigned int NbThread);
bool m_isInitialized;
unsigned m_workerThreadCount;
volatile bool m_workerThreadsIdle;
bool m_isClosing;
unsigned m_threadCount;
friend class WorkerThread;
};
} // namespace sofa::simulation