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https://github.com/Atmosphere-NX/Atmosphere-libs.git
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86 lines
2.6 KiB
C++
86 lines
2.6 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* 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, see <http://www.gnu.org/licenses/>.
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*/
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#include <stratosphere.hpp>
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#include "impl/os_thread_manager.hpp"
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#if defined(ATMOSPHERE_OS_HORIZON)
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#include "impl/os_internal_busy_mutex_impl.os.horizon.hpp"
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#else
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/* Generic implementation already included in <stratosphere.hpp> */
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#endif
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namespace ams::os {
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void InitializeBusyMutex(BusyMutexType *mutex) {
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/* Create object. */
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util::ConstructAt(mutex->_storage);
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/* Set member variables. */
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mutex->owner_thread = nullptr;
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/* Mark initialized. */
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mutex->state = BusyMutexType::State_Initialized;
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}
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void FinalizeBusyMutex(BusyMutexType *mutex) {
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/* Check pre-conditions. */
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AMS_ASSERT(mutex->state == BusyMutexType::State_Initialized);
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AMS_ASSERT(!util::GetReference(mutex->_storage).IsLocked());
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/* Mark not intialized. */
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mutex->state = MutexType::State_NotInitialized;
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/* Destroy object. */
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util::DestroyAt(mutex->_storage);
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}
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void LockBusyMutex(BusyMutexType *mutex) {
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/* Check pre-conditions. */
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AMS_ASSERT(mutex->state == BusyMutexType::State_Initialized);
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/* Lock mutex. */
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util::GetReference(mutex->_storage).Lock();
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/* Set owner thread. */
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mutex->owner_thread = impl::GetCurrentThread();
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}
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bool TryLockBusyMutex(BusyMutexType *mutex) {
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/* Check pre-conditions. */
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AMS_ASSERT(mutex->state == BusyMutexType::State_Initialized);
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/* Try to lock mutex. */
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const bool locked = util::GetReference(mutex->_storage).TryLock();
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/* Set owner thread. */
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if (locked) {
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mutex->owner_thread = impl::GetCurrentThread();
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}
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return locked;
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}
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void UnlockBusyMutex(BusyMutexType *mutex) {
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/* Check pre-conditions. */
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AMS_ASSERT(mutex->state == BusyMutexType::State_Initialized);
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AMS_ASSERT(util::GetReference(mutex->_storage).IsLocked() && mutex->owner_thread == impl::GetCurrentThread());
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/* Unlock. */
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util::GetReference(mutex->_storage).Unlock();
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}
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}
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