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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** 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 General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** 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-3.0.html.
**
****************************************************************************/
#pragma once
#include "environment.h"
#include "pchgeneratorinterface.h"
#include "pchgeneratornotifierinterface.h"
#include <projectpartpch.h>
#include <QProcess>
#include <queue>
namespace ClangBackEnd {
template <typename Process>
class PchGenerator final : public PchGeneratorInterface
{
public:
PchGenerator(Environment &environment,
PchGeneratorNotifierInterface *notifier=nullptr)
: m_environment(environment),
m_notifier(notifier)
{
}
~PchGenerator()
{
cleanupAllProcesses();
}
void startTask(Utils::SmallStringVector &&compilerArguments, ProjectPartPch &&projectPartPch) override
{
addTask(std::move(compilerArguments), std::move(projectPartPch));
}
void setNotifier(PchGeneratorNotifierInterface *notifier)
{
m_notifier = notifier;
}
unittest_public:
Process *addTask(Utils::SmallStringVector &&compilerArguments, ProjectPartPch &&projectPartPch)
{
auto process = std::make_unique<Process>();
Process *processPointer = process.get();
process->setProcessChannelMode(QProcess::ForwardedChannels);
process->setArguments(QStringList(compilerArguments));
process->setProgram(QString(m_environment.clangCompilerPath()));
connectProcess(processPointer, std::move(projectPartPch));
if (!deferProcess())
startProcess(std::move(process));
else
m_deferredProcesses.push(std::move(process));
return processPointer;
}
void connectProcess(Process *process, ProjectPartPch &&projectPartPch)
{
auto finishedCallback = [=,projectPartPch=std::move(projectPartPch)] (int exitCode, QProcess::ExitStatus exitStatus) {
deleteProcess(process);
activateNextDeferredProcess();
m_notifier->taskFinished(generateTaskFinishStatus(exitCode, exitStatus), projectPartPch);
};
QObject::connect(process,
static_cast<void (Process::*)(int, QProcess::ExitStatus)>(&Process::finished),
std::move(finishedCallback));
}
void startProcess(std::unique_ptr<Process> &&process)
{
process->start();
m_runningProcesses.push_back(std::move(process));
}
const std::vector<std::unique_ptr<Process>> &runningProcesses() const
{
return m_runningProcesses;
}
const std::queue<std::unique_ptr<Process>> &deferredProcesses() const
{
return m_deferredProcesses;
}
void deleteProcess(Process *process)
{
auto found = std::find_if(m_runningProcesses.begin(),
m_runningProcesses.end(),
[=] (const std::unique_ptr<Process> &entry) {
return entry.get() == process;
});
if (found != m_runningProcesses.end()) {
std::unique_ptr<Process> avoidDoubleDeletedProcess = std::move(*found);
m_runningProcesses.erase(found);
}
}
void cleanupAllProcesses()
{
std::vector<std::unique_ptr<Process>> runningProcesses = std::move(m_runningProcesses);
std::queue<std::unique_ptr<Process>> deferredProcesses = std::move(m_deferredProcesses);
}
static TaskFinishStatus generateTaskFinishStatus(int exitCode, QProcess::ExitStatus exitStatus)
{
if (exitCode != 0 || exitStatus != QProcess::NormalExit)
return TaskFinishStatus::Unsuccessfully;
else
return TaskFinishStatus::Successfully;
}
bool deferProcess() const
{
return m_environment.hardwareConcurrency() <= m_runningProcesses.size();
}
void activateNextDeferredProcess()
{
if (!m_deferredProcesses.empty()) {
std::unique_ptr<Process> process = std::move(m_deferredProcesses.front());
m_deferredProcesses.pop();
startProcess(std::move(process));
}
}
private:
std::vector<std::unique_ptr<Process>> m_runningProcesses;
std::queue<std::unique_ptr<Process>> m_deferredProcesses;
Environment &m_environment;
PchGeneratorNotifierInterface *m_notifier=nullptr;
};
} // namespace ClangBackEnd
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