Revision control
++ // Copyright (C) 2023 Intel Corporation.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++ // Qt-Security score:significant reason:default
++
++ #ifndef QFUTEX_MAC_P_H
++ #define QFUTEX_MAC_P_H
++
++ //
++ // W A R N I N G
++ // -------------
++ //
++ // This file is not part of the Qt API. It exists purely as an
++ // implementation detail. This header file may change from version to
++ // version without notice, or even be removed.
++ //
++ // We mean it.
++ //
++
++ #include <qdeadlinetimer.h>
++ #include <qtsan_impl.h>
++ #include <private/qglobal_p.h>
++
++ #include <os/os_sync_wait_on_address.h>
++
++ #define QT_ALWAYS_USE_FUTEX
++
++ QT_BEGIN_NAMESPACE
++
++ namespace QtDarwinFutex {
++
++ constexpr bool futexAvailable() { return true; }
++
++ template <typename Atomic>
++ inline void futexWait(Atomic &futex, typename Atomic::Type expectedValue)
++ {
++ QtTsan::futexRelease(&futex);
++ static_assert(sizeof(typename Atomic::Type) == 4 || sizeof(typename Atomic::Type) == 8);
++ os_sync_wait_on_address(&futex, quint64(expectedValue), sizeof(typename Atomic::Type),
++ OS_SYNC_WAIT_ON_ADDRESS_NONE);
++ QtTsan::futexAcquire(&futex);
++ }
++
++ template <typename Atomic>
++ inline bool futexWait(Atomic &futex, typename Atomic::Type expectedValue, QDeadlineTimer timer)
++ {
++ QtTsan::futexRelease(&futex);
++ static_assert(sizeof(typename Atomic::Type) == 4 || sizeof(typename Atomic::Type) == 8);
++ int r = os_sync_wait_on_address_with_timeout(
++ &futex, quint64(expectedValue), sizeof(typename Atomic::Type),
++ OS_SYNC_WAIT_ON_ADDRESS_NONE, OS_CLOCK_MACH_ABSOLUTE_TIME, timer.remainingTimeNSecs());
++ QtTsan::futexAcquire(&futex);
++ return r >= 0 || errno != ETIMEDOUT;
++ }
++
++ template <typename Atomic>
++ inline void futexWakeAll(Atomic &futex)
++ {
++ static_assert(sizeof(typename Atomic::Type) == 4 || sizeof(typename Atomic::Type) == 8);
++ os_sync_wake_by_address_all(&futex, sizeof(typename Atomic::Type),
++ OS_SYNC_WAKE_BY_ADDRESS_NONE);
++ }
++
++ template <typename Atomic>
++ inline void futexWakeOne(Atomic &futex)
++ {
++ static_assert(sizeof(typename Atomic::Type) == 4 || sizeof(typename Atomic::Type) == 8);
++ os_sync_wake_by_address_any(&futex, sizeof(typename Atomic::Type),
++ OS_SYNC_WAKE_BY_ADDRESS_NONE);
++ }
++ } //namespace QtDarwinFutex
++
++ namespace QtFutex = QtDarwinFutex;
++
++ QT_END_NAMESPACE
++
++ #endif // QFUTEX_MAC_P_H