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70 lines
1.9 KiB
70 lines
1.9 KiB
// SPDX-License-Identifier: BSD-3-Clause
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// Copyright (c) 2014-2021, The Monero Project.
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#ifndef FUTURE_SCHEDULER_H
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#define FUTURE_SCHEDULER_H
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#include <functional>
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#include <QtConcurrent/QtConcurrent>
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#include <QFuture>
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//#include <QJSValue>
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#include <QMutex>
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#include <QMutexLocker>
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#include <QPair>
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#include <QWaitCondition>
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class FutureScheduler : public QObject
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{
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Q_OBJECT
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public:
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FutureScheduler(QObject *parent);
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~FutureScheduler();
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void shutdownWaitForFinished() noexcept;
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QPair<bool, QFuture<void>> run(std::function<void()> function) noexcept;
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// QPair<bool, QFuture<QJSValueList>> run(std::function<QJSValueList()> function, const QJSValue &callback);
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bool stopping() const noexcept;
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private:
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bool add() noexcept;
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void done() noexcept;
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template<typename T>
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QPair<bool, QFuture<T>> execute(std::function<QFuture<T>(QFutureWatcher<T> *)> makeFuture) noexcept
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{
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if (add())
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{
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try
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{
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auto *watcher = new QFutureWatcher<T>();
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connect(watcher, &QFutureWatcher<T>::finished, [watcher] {
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watcher->deleteLater();
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});
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watcher->setFuture(makeFuture(watcher));
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return qMakePair(true, watcher->future());
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}
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catch (const std::exception &exception)
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{
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qCritical() << "Failed to schedule async function: " << exception.what();
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done();
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}
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}
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return qMakePair(false, QFuture<T>());
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}
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QFutureWatcher<void> schedule(std::function<void()> function);
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//QFutureWatcher<QJSValueList> schedule(std::function<QJSValueList() noexcept> function, const QJSValue &callback);
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private:
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size_t Alive;
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QWaitCondition Condition;
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QMutex Mutex;
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std::atomic<bool> Stopping;
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};
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#endif // FUTURE_SCHEDULER_H
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