mirror of
https://github.com/Mudlet/Mudlet
synced 2026-08-13 18:26:27 -04:00
61 lines
2.9 KiB
C++
61 lines
2.9 KiB
C++
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/***************************************************************************
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* Copyright (C) 2026 by Vadim Peretokin - vadim.peretokin@mudlet.org *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#include "EventLoopPump.h"
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#include <QCoreApplication>
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#include <QDeadlineTimer>
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#include <QDebug>
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#include <QEventLoop>
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#include <QThread>
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// A nested QEventLoop::exec() cannot be used here. exec() sets
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// QEventLoop::EventLoopExec, which QCocoaEventDispatcher answers by re-entering
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// -[NSApplication run] and leaving Qt's timers to the platform run loop; nested
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// inside a Qt timer callback that run loop never wakes it again, so not even
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// the wait's own timeout fires (issue #9670). processEvents() instead takes the
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// branch that drives the dispatcher's processTimers() on every pass.
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bool EventLoopPump::pumpFor(const int timeoutMs, const std::function<bool()>& stopCondition)
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{
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// processEvents() returns silently without a dispatcher, which would make
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// this a plain sleep that then reports a timeout as though it had waited.
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if (!QThread::currentThread()->eventDispatcher()) {
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qWarning() << "EventLoopPump::pumpFor() called with no event dispatcher on this thread, no events can be delivered";
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return false;
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}
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QDeadlineTimer deadline(qMax(timeoutMs, 0));
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if (stopCondition && stopCondition()) {
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return true;
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}
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while (true) {
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QCoreApplication::processEvents(QEventLoop::AllEvents);
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if (stopCondition && stopCondition()) {
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return true;
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}
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if (deadline.hasExpired()) {
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return false;
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}
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// A pass returns as soon as nothing is pending, so without this the loop
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// spins a core flat for the whole timeout.
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QThread::msleep(1);
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}
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}
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