mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-05 04:28:04 +01:00
98 lines
3.7 KiB
C++
98 lines
3.7 KiB
C++
/*
|
|
* Copyright (c) Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include <stratosphere.hpp>
|
|
#if !defined(AMS_OS_INTERNAL_CRITICAL_SECTION_IMPL_CAN_CHECK_LOCKED_BY_CURRENT_THREAD)
|
|
#include "impl/os_thread_manager.hpp"
|
|
#endif
|
|
|
|
namespace ams::os {
|
|
|
|
void InitializeSdkRecursiveMutex(SdkRecursiveMutexType *rmutex) {
|
|
/* Initialize the critical section. */
|
|
GetReference(rmutex->_storage).Initialize();
|
|
|
|
/* Set recursive count. */
|
|
rmutex->recursive_count = 0;
|
|
|
|
/* If the underlying critical section can't readily be checked, set owner thread. */
|
|
#if !defined(AMS_OS_INTERNAL_CRITICAL_SECTION_IMPL_CAN_CHECK_LOCKED_BY_CURRENT_THREAD)
|
|
rmutex->owner_thread = nullptr;
|
|
#endif
|
|
}
|
|
|
|
bool IsSdkRecursiveMutexLockedByCurrentThread(const SdkRecursiveMutexType *rmutex) {
|
|
#if defined(AMS_OS_INTERNAL_CRITICAL_SECTION_IMPL_CAN_CHECK_LOCKED_BY_CURRENT_THREAD)
|
|
/* Check whether the critical section is held. */
|
|
return GetReference(rmutex->_storage).IsLockedByCurrentThread();
|
|
#else
|
|
/* Check if the current thread is owner. */
|
|
return rmutex->owner_thread == os::impl::GetCurrentThread();
|
|
#endif
|
|
}
|
|
|
|
void LockSdkRecursiveMutex(SdkRecursiveMutexType *rmutex) {
|
|
/* If we don't hold the mutex, enter the critical section. */
|
|
if (!IsSdkRecursiveMutexLockedByCurrentThread(rmutex)) {
|
|
GetReference(rmutex->_storage).Enter();
|
|
|
|
/* If necessary, set owner thread. */
|
|
#if !defined(AMS_OS_INTERNAL_CRITICAL_SECTION_IMPL_CAN_CHECK_LOCKED_BY_CURRENT_THREAD)
|
|
rmutex->owner_thread = os::impl::GetCurrentThread();
|
|
#endif
|
|
}
|
|
|
|
/* Increment (and check) recursive count. */
|
|
++rmutex->recursive_count;
|
|
AMS_ABORT_UNLESS(rmutex->recursive_count != 0);
|
|
}
|
|
|
|
bool TryLockSdkRecursiveMutex(SdkRecursiveMutexType *rmutex) {
|
|
/* If we don't hold the mutex, try to enter the critical section. */
|
|
if (!IsSdkRecursiveMutexLockedByCurrentThread(rmutex)) {
|
|
if (!GetReference(rmutex->_storage).TryEnter()) {
|
|
return false;
|
|
}
|
|
|
|
/* If necessary, set owner thread. */
|
|
#if !defined(AMS_OS_INTERNAL_CRITICAL_SECTION_IMPL_CAN_CHECK_LOCKED_BY_CURRENT_THREAD)
|
|
rmutex->owner_thread = os::impl::GetCurrentThread();
|
|
#endif
|
|
}
|
|
|
|
/* Increment (and check) recursive count. */
|
|
++rmutex->recursive_count;
|
|
AMS_ABORT_UNLESS(rmutex->recursive_count != 0);
|
|
|
|
return true;
|
|
}
|
|
|
|
void UnlockSdkRecursiveMutex(SdkRecursiveMutexType *rmutex) {
|
|
/* Check pre-conditions. */
|
|
AMS_ABORT_UNLESS(IsSdkRecursiveMutexLockedByCurrentThread(rmutex));
|
|
|
|
/* Decrement recursive count, and leave critical section if we no longer hold the mutex. */
|
|
if ((--rmutex->recursive_count) == 0) {
|
|
/* If necessary, clear owner thread. */
|
|
#if !defined(AMS_OS_INTERNAL_CRITICAL_SECTION_IMPL_CAN_CHECK_LOCKED_BY_CURRENT_THREAD)
|
|
rmutex->owner_thread = nullptr;
|
|
#endif
|
|
|
|
GetReference(rmutex->_storage).Leave();
|
|
}
|
|
}
|
|
|
|
}
|