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/****************************************************************************
**
** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** 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 http://www.qt.io/terms-conditions. For further
** information use the contact form at http://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.LGPLv3 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.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 later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifdef THREAD_WEAVER
#include <threadweaver.h>
#include <dependencypolicy.h>
#include <thread.h>
#include "job.h"
#include "weaverjob_p.h"
#endif
#include "qaspectjobmanager_p.h"
#include "task_p.h"
#include "qthreadpooler_p.h"
#include "dependencyhandler_p.h"
#include <QAtomicInt>
#include <QDebug>
#include <QThread>
#include <QCoreApplication>
#include <QtCore/QFuture>
#include <QtCore/QFutureWatcher>
QT_BEGIN_NAMESPACE
namespace Qt3D {
#ifdef THREAD_WEAVER
namespace {
class SynchronizedJob : public ThreadWeaver::Job
{
public:
SynchronizedJob(QAbstractAspectJobManager::JobFunction func, void *arg, QAtomicInt *atomicCount)
: m_func(func)
, m_arg(arg)
, m_atomicCount(atomicCount)
{}
protected:
void run(ThreadWeaver::JobPointer self, ThreadWeaver::Thread *thread) Q_DECL_OVERRIDE;
private:
QAbstractAspectJobManager::JobFunction m_func;
void *m_arg;
QAtomicInt *m_atomicCount;
};
typedef QSharedPointer<SynchronizedJob> SynchronizedJobPtr;
void SynchronizedJob::run(ThreadWeaver::JobPointer self, ThreadWeaver::Thread *thread)
{
Q_UNUSED(self);
Q_CHECK_PTR(m_func);
Q_CHECK_PTR(thread);
// Call the function
m_func(m_arg);
// Decrement the atomic counter to let others know we've done our bit
m_atomicCount->deref();
// Wait for the other worker threads to be done
while (m_atomicCount->load() > 0)
thread->yieldCurrentThread();
}
} // anonymous
#endif
/*!
\class Qt3D::QAspectJobManager
\internal
*/
QAspectJobManager::QAspectJobManager(QObject *parent)
: QAbstractAspectJobManager(parent)
#ifdef THREAD_WEAVER
, m_weaver(Q_NULLPTR)
#endif
, m_threadPooler(new QThreadPooler(this))
, m_dependencyHandler(new DependencyHandler)
{
#ifdef THREAD_WEAVER
m_weaver = new ThreadWeaver::Queue(this);
m_weaver->setMaximumNumberOfThreads(QThread::idealThreadCount());
#else
m_threadPooler->setDependencyHandler(m_dependencyHandler.data());
#endif
}
QAspectJobManager::~QAspectJobManager()
{
}
void QAspectJobManager::initialize()
{
}
void QAspectJobManager::enqueueJobs(const QVector<QAspectJobPtr> &jobQueue)
{
#ifdef THREAD_WEAVER
// Convert QJobs to ThreadWeaver::Jobs
QHash<QAspectJob *, QSharedPointer<WeaverJob> > jobsMap;
Q_FOREACH (const QAspectJobPtr &job, jobQueue) {
QSharedPointer<WeaverJob> weaverJob(new WeaverJob);
weaverJob->m_job = job;
jobsMap.insert(job.data(), weaverJob);
}
// Resolve dependencies
Q_FOREACH (const QAspectJobPtr &job, jobQueue) {
const QVector<QWeakPointer<QAspectJob> > &deps = job->dependencies();
Q_FOREACH (const QWeakPointer<QAspectJob> &dep, deps) {
QSharedPointer<WeaverJob> weaverDep = jobsMap.value(dep.data());
if (weaverDep) {
ThreadWeaver::DependencyPolicy &dependencyPolicy = ThreadWeaver::DependencyPolicy::instance();
QSharedPointer<WeaverJob> weaverJob = jobsMap.value(job.data());
dependencyPolicy.addDependency(weaverJob, weaverDep);
}
}
}
Q_FOREACH (const QAspectJobPtr &job, jobQueue) {
QSharedPointer<WeaverJob> weaverJob = jobsMap.value(job.data());
m_weaver->enqueue(weaverJob);
}
#else
// Convert QJobs to Tasks
QHash<QAspectJob *, AspectTaskRunnable *> tasksMap;
QVector<RunnableInterface *> taskList;
Q_FOREACH (const QAspectJobPtr &job, jobQueue) {
AspectTaskRunnable *task = new AspectTaskRunnable();
task->m_job = job;
tasksMap.insert(job.data(), task);
taskList << task;
}
// Resolve dependencies
QVector<Dependency> dependencyList;
Q_FOREACH (const QSharedPointer<QAspectJob> &job, jobQueue) {
const QVector<QWeakPointer<QAspectJob> > &deps = job->dependencies();
Q_FOREACH (const QWeakPointer<QAspectJob> &dep, deps) {
AspectTaskRunnable *taskDependee = tasksMap.value(dep.data());
if (taskDependee) {
AspectTaskRunnable *taskDepender = tasksMap.value(job.data());
dependencyList.append(Dependency(taskDepender, taskDependee));
taskDepender->setDependencyHandler(m_dependencyHandler.data());
taskDependee->setDependencyHandler(m_dependencyHandler.data());
}
}
}
m_dependencyHandler->addDependencies(qMove(dependencyList));
m_threadPooler->mapDependables(taskList);
#endif
}
void QAspectJobManager::waitForAllJobs()
{
#ifdef THREAD_WEAVER
m_weaver->finish();
#else
QFutureWatcher<void> futureWatcher;
futureWatcher.setFuture(m_threadPooler->future());
futureWatcher.waitForFinished();
#endif
}
void QAspectJobManager::waitForPerThreadFunction(JobFunction func, void *arg)
{
#ifdef THREAD_WEAVER
const int threadCount = m_weaver->maximumNumberOfThreads();
QAtomicInt atomicCount(threadCount);
for (int i = 0; i < threadCount; ++i) {
SynchronizedJobPtr syncJob(new SynchronizedJob(func, arg, &atomicCount));
m_weaver->enqueue(syncJob);
}
m_weaver->finish();
#else
const int threadCount = m_threadPooler->maxThreadCount();
QAtomicInt atomicCount(threadCount);
QVector<RunnableInterface *> taskList;
for (int i = 0; i < threadCount; ++i) {
SyncTaskRunnable *syncTask = new SyncTaskRunnable(func, arg, &atomicCount);
taskList << syncTask;
}
QFuture<void> future = m_threadPooler->mapDependables(taskList);
QFutureWatcher<void> futureWatcher;
futureWatcher.setFuture(future);
futureWatcher.waitForFinished();
#endif
}
} // namespace Qt3D
QT_END_NAMESPACE
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