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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qplatformdefs.h"
#include "qmutex.h"
#include "qmutex_p.h"
#include "private/qcore_unix_p.h"
#include <mach/mach.h>
#include <mach/task.h>
#include <errno.h>
QT_BEGIN_NAMESPACE
QMutexPrivate::QMutexPrivate()
{
kern_return_t r = semaphore_create(mach_task_self(), &mach_semaphore, SYNC_POLICY_FIFO, 0);
if (r != KERN_SUCCESS)
qWarning("QMutex: failed to create semaphore, error %d", r);
}
QMutexPrivate::~QMutexPrivate()
{
kern_return_t r = semaphore_destroy(mach_task_self(), mach_semaphore);
if (r != KERN_SUCCESS)
qWarning("QMutex: failed to destroy semaphore, error %d", r);
}
bool QMutexPrivate::wait(QDeadlineTimer timeout)
{
kern_return_t r;
if (timeout.isForever()) {
do {
r = semaphore_wait(mach_semaphore);
} while (r == KERN_ABORTED);
Q_ASSERT(r == KERN_SUCCESS);
} else {
timespec tv = durationToTimespec(timeout.remainingTimeAsDuration());
mach_timespec_t ts;
ts.tv_nsec = tv.tv_nsec;
ts.tv_sec = tv.tv_sec;
r = semaphore_timedwait(mach_semaphore, ts);
}
return (r == KERN_SUCCESS);
}
void QMutexPrivate::wakeUp() noexcept
{
semaphore_signal(mach_semaphore);
}
QT_END_NAMESPACE
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