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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qthreadpooler_p.h"
#include "dependencyhandler_p.h"
#include <QDebug>
#ifdef QT3D_JOBS_RUN_STATS
#include <QFile>
#include <QThreadStorage>
#endif
QT_BEGIN_NAMESPACE
namespace Qt3DCore {
#ifdef QT3D_JOBS_RUN_STATS
QElapsedTimer QThreadPooler::m_jobsStatTimer;
#endif
QThreadPooler::QThreadPooler(QObject *parent)
: QObject(parent),
m_futureInterface(nullptr),
m_mutex(),
m_taskCount(0)
{
// Ensures that threads will never be recycled
m_threadPool.setExpiryTimeout(-1);
#ifdef QT3D_JOBS_RUN_STATS
QThreadPooler::m_jobsStatTimer.start();
#endif
}
QThreadPooler::~QThreadPooler()
{
// Wait till all tasks are finished before deleting mutex
QMutexLocker locker(&m_mutex);
locker.unlock();
}
void QThreadPooler::setDependencyHandler(DependencyHandler *handler)
{
m_dependencyHandler = handler;
m_dependencyHandler->setMutex(&m_mutex);
}
void QThreadPooler::enqueueTasks(const QVector<RunnableInterface *> &tasks)
{
// The caller have to set the mutex
const QVector<RunnableInterface *>::const_iterator end = tasks.cend();
for (QVector<RunnableInterface *>::const_iterator it = tasks.cbegin();
it != end; ++it) {
if (!m_dependencyHandler->hasDependency((*it)) && !(*it)->reserved()) {
(*it)->setReserved(true);
(*it)->setPooler(this);
m_threadPool.start((*it));
}
}
}
void QThreadPooler::taskFinished(RunnableInterface *task)
{
const QMutexLocker locker(&m_mutex);
release();
if (task->dependencyHandler()) {
const QVector<RunnableInterface *> freedTasks = m_dependencyHandler->freeDependencies(task);
if (!freedTasks.empty())
enqueueTasks(freedTasks);
}
if (currentCount() == 0) {
if (m_futureInterface) {
m_futureInterface->reportFinished();
delete m_futureInterface;
}
m_futureInterface = nullptr;
}
}
QFuture<void> QThreadPooler::mapDependables(QVector<RunnableInterface *> &taskQueue)
{
const QMutexLocker locker(&m_mutex);
if (!m_futureInterface)
m_futureInterface = new QFutureInterface<void>();
if (!taskQueue.empty())
m_futureInterface->reportStarted();
acquire(taskQueue.size());
enqueueTasks(taskQueue);
return QFuture<void>(m_futureInterface);
}
QFuture<void> QThreadPooler::future()
{
const QMutexLocker locker(&m_mutex);
if (!m_futureInterface)
return QFuture<void>();
else
return QFuture<void>(m_futureInterface);
}
void QThreadPooler::acquire(int add)
{
// The caller have to set the mutex
m_taskCount.fetchAndAddOrdered(add);
}
void QThreadPooler::release()
{
// The caller have to set the mutex
m_taskCount.fetchAndAddOrdered(-1);
}
int QThreadPooler::currentCount() const
{
// The caller have to set the mutex
return m_taskCount.load();
}
int QThreadPooler::maxThreadCount() const
{
return m_threadPool.maxThreadCount();
}
#ifdef QT3D_JOBS_RUN_STATS
typedef QVector<JobRunStats> JobRunStatsList;
typedef JobRunStatsList* JobRunStatsListPtr;
typedef QThreadStorage<JobRunStatsListPtr> JobRunStatStorage;
JobRunStatStorage jobStatsCached;
QVector<JobRunStatsListPtr> localStorages;
QMutex localStoragesMutex;
// Called by the jobs
void QThreadPooler::addJobLogStatsEntry(JobRunStats &stats)
{
if (!jobStatsCached.hasLocalData()) {
auto jobVector = new JobRunStatsList;
jobStatsCached.setLocalData(jobVector);
QMutexLocker lock(&localStoragesMutex);
localStorages.push_back(jobVector);
}
jobStatsCached.localData()->push_back(stats);
}
// Called before jobs are executed (AspectThread)
void QThreadPooler::starNewFrameJobLogsStats()
{
Q_FOREACH (JobRunStatsListPtr storage, localStorages) {
storage->clear();
}
}
// Called after jobs have been executed
void QThreadPooler::writeFrameJobLogStats()
{
static QScopedPointer<QFile> traceFile;
static quint32 frameId = 0;
if (!traceFile) {
traceFile.reset(new QFile(QStringLiteral("trace.qt3d")));
if (!traceFile->open(QFile::WriteOnly|QFile::Truncate))
qCritical("Failed to open trace file");
}
FrameHeader header;
header.frameId = frameId;
header.jobCount = 0;
Q_FOREACH (const JobRunStatsListPtr storage, localStorages)
header.jobCount += storage->size();
traceFile->write(reinterpret_cast<char *>(&header), sizeof(FrameHeader));
Q_FOREACH (const JobRunStatsListPtr storage, localStorages) {
qDebug() << Q_FUNC_INFO << localStorages.size() << storage << storage->size();
Q_FOREACH (const JobRunStats &stat, *storage) {
traceFile->write(reinterpret_cast<const char *>(&stat), sizeof(JobRunStats));
}
}
traceFile->flush();
++frameId;
}
#endif
} // namespace Qt3DCore
QT_END_NAMESPACE
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