threadutils.h

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// SPDX-FileCopyrightText: Copyright (C) 2015 swift Project Community / Contributors
// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-swift-pilot-client-1
 
 
#ifndef SWIFT_MISC_THREADUTILS_H
#define SWIFT_MISC_THREADUTILS_H
 
#include <functional>
 
#include <QMetaObject>
#include <QObject>
#include <QSharedPointer>
#include <QThread>
#include <QTimer>
 
#include "misc/promise.h"
#include "misc/stacktrace.h"
#include "misc/swiftmiscexport.h"
 
namespace swift::misc
{
    template <typename F>
    auto singleShot(int msec, QObject *target, F &&task)
    {
        CPromise<decltype(task())> promise;
        QSharedPointer<QTimer> timer(new QTimer,
                                     [](QObject *o) { QMetaObject::invokeMethod(o, &QObject::deleteLater); });
        timer->setSingleShot(true);
        timer->moveToThread(target->thread());
        QObject::connect(timer.data(), &QTimer::timeout, target,
                         [trace = getStackTrace(), task = std::forward<F>(task), timer, promise]() mutable {
                             static_cast<void>(trace);
                             timer.clear();
                             promise.setResultFrom(task);
                         });
        QMetaObject::invokeMethod(timer.data(), [t = timer.data(), msec] { t->start(msec); });
        return promise.future();
    }
 
    class SWIFT_MISC_EXPORT CThreadUtils
    {
    public:
        CThreadUtils() = delete;
 
        static bool isInThisThread(const QObject *toBeTested);
 
        static bool thisIsMainThread();
 
        static QString currentThreadInfo();
    };
} // namespace swift::misc
 
#endif // SWIFT_MISC_THREADUTILS_H