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// Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qaspectjobmanager_p.h"
#include <QtCore/QAtomicInt>
#include <QtCore/QCoreApplication>
#include <QtCore/QDebug>
#include <QtCore/QThread>
#include <QtCore/QFuture>
#include <Qt3DCore/private/qaspectmanager_p.h>
#include <Qt3DCore/private/qthreadpooler_p.h>
#include <Qt3DCore/private/task_p.h>
QT_BEGIN_NAMESPACE
namespace Qt3DCore {
QAspectJobManager::QAspectJobManager(QAspectManager *parent)
: QAbstractAspectJobManager(parent)
, m_threadPooler(new QThreadPooler(this))
, m_aspectManager(parent)
{
}
QAspectJobManager::~QAspectJobManager()
{
}
void QAspectJobManager::initialize()
{
}
// Adds all Aspect Jobs to be processed for a frame
void QAspectJobManager::enqueueJobs(const std::vector<QAspectJobPtr> &jobQueue)
{
auto systemService = m_aspectManager ? m_aspectManager->serviceLocator()->systemInformation() : nullptr;
if (systemService)
systemService->writePreviousFrameTraces();
// Convert QJobs to Tasks
QHash<QAspectJob *, AspectTaskRunnable *> tasksMap;
QList<RunnableInterface *> taskList;
taskList.reserve(jobQueue.size());
for (const QAspectJobPtr &job : jobQueue) {
AspectTaskRunnable *task = new AspectTaskRunnable(systemService);
task->m_job = job;
tasksMap.insert(job.data(), task);
taskList << task;
}
for (const QAspectJobPtr &job : jobQueue) {
const std::vector<QWeakPointer<QAspectJob> > &deps = job->dependencies();
AspectTaskRunnable *taskDepender = tasksMap.value(job.data());
int dependerCount = 0;
for (const QWeakPointer<QAspectJob> &dep : deps) {
AspectTaskRunnable *taskDependee = tasksMap.value(dep.toStrongRef().data());
// The dependencies here are not hard requirements, i.e., the dependencies
// not in the jobQueue should already have their data ready.
if (taskDependee) {
taskDependee->m_dependers.append(taskDepender);
++dependerCount;
}
}
taskDepender->m_dependerCount += dependerCount;
}
m_threadPooler->mapDependables(taskList);
}
// Wait for all aspects jobs to be completed
int QAspectJobManager::waitForAllJobs()
{
return m_threadPooler->waitForAllJobs();
}
void QAspectJobManager::waitForPerThreadFunction(JobFunction func, void *arg)
{
const int threadCount = QAspectJobManager::idealThreadCount();
QAtomicInt atomicCount(threadCount);
QList<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);
future.waitForFinished();
}
int QAspectJobManager::idealThreadCount()
{
static int jobCount = 0;
if (jobCount)
return jobCount;
const QByteArray maxThreadCount = qgetenv("QT3D_MAX_THREAD_COUNT");
if (!maxThreadCount.isEmpty()) {
bool conversionOK = false;
const int maxThreadCountValue = maxThreadCount.toInt(&conversionOK);
if (conversionOK) {
jobCount = maxThreadCountValue;
return jobCount;
}
}
jobCount = QThread::idealThreadCount();
return jobCount;
}
} // namespace Qt3DCore
QT_END_NAMESPACE
#include "moc_qaspectjobmanager_p.cpp"
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