mirror of
https://github.com/Atmosphere-NX/Atmosphere-libs.git
synced 2025-10-31 11:36:02 +01:00
103 lines
4.2 KiB
C++
103 lines
4.2 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>
|
|
#include "impl/os_thread_manager.hpp"
|
|
#include "impl/os_rw_lock_impl.hpp"
|
|
|
|
namespace ams::os {
|
|
|
|
void InitalizeReaderWriterLock(ReaderWriterLockType *rw_lock) {
|
|
/* Create objects. */
|
|
util::ConstructAt(impl::GetLockCount(rw_lock).cs_storage);
|
|
util::ConstructAt(rw_lock->cv_read_lock._storage);
|
|
util::ConstructAt(rw_lock->cv_write_lock._storage);
|
|
|
|
/* Set member variables. */
|
|
impl::ClearReadLockCount(impl::GetLockCount(rw_lock));
|
|
impl::ClearWriteLocked(impl::GetLockCount(rw_lock));
|
|
impl::ClearReadLockWaiterCount(impl::GetLockCount(rw_lock));
|
|
impl::ClearWriteLockWaiterCount(impl::GetLockCount(rw_lock));
|
|
impl::ClearWriteLockCount(rw_lock);
|
|
rw_lock->owner_thread = nullptr;
|
|
|
|
/* Mark initialized. */
|
|
rw_lock->state = ReaderWriterLockType::State_Initialized;
|
|
}
|
|
|
|
void FinalizeReaderWriterLock(ReaderWriterLockType *rw_lock) {
|
|
AMS_ASSERT(rw_lock->state == ReaderWriterLockType::State_Initialized);
|
|
|
|
/* Don't allow finalizing a locked lock. */
|
|
AMS_ASSERT(impl::GetReadLockCount(impl::GetLockCount(rw_lock)) == 0);
|
|
AMS_ASSERT(impl::GetWriteLocked(impl::GetLockCount(rw_lock)) == 0);
|
|
|
|
/* Mark not initialized. */
|
|
rw_lock->state = ReaderWriterLockType::State_NotInitialized;
|
|
|
|
/* Destroy objects. */
|
|
util::DestroyAt(rw_lock->cv_write_lock._storage);
|
|
util::DestroyAt(rw_lock->cv_read_lock._storage);
|
|
util::DestroyAt(impl::GetLockCount(rw_lock).cs_storage);
|
|
}
|
|
|
|
void AcquireReadLock(ReaderWriterLockType *rw_lock) {
|
|
AMS_ASSERT(rw_lock->state == ReaderWriterLockType::State_Initialized);
|
|
return impl::ReaderWriterLockImpl::AcquireReadLock(rw_lock);
|
|
}
|
|
|
|
bool TryAcquireReadLock(ReaderWriterLockType *rw_lock) {
|
|
AMS_ASSERT(rw_lock->state == ReaderWriterLockType::State_Initialized);
|
|
return impl::ReaderWriterLockImpl::TryAcquireReadLock(rw_lock);
|
|
}
|
|
|
|
void ReleaseReadLock(ReaderWriterLockType *rw_lock) {
|
|
AMS_ASSERT(rw_lock->state == ReaderWriterLockType::State_Initialized);
|
|
return impl::ReaderWriterLockImpl::ReleaseReadLock(rw_lock);
|
|
}
|
|
|
|
void AcquireWriteLock(ReaderWriterLockType *rw_lock) {
|
|
AMS_ASSERT(rw_lock->state == ReaderWriterLockType::State_Initialized);
|
|
return impl::ReaderWriterLockImpl::AcquireWriteLock(rw_lock);
|
|
}
|
|
|
|
bool TryAcquireWriteLock(ReaderWriterLockType *rw_lock) {
|
|
AMS_ASSERT(rw_lock->state == ReaderWriterLockType::State_Initialized);
|
|
return impl::ReaderWriterLockImpl::TryAcquireWriteLock(rw_lock);
|
|
}
|
|
|
|
void ReleaseWriteLock(ReaderWriterLockType *rw_lock) {
|
|
AMS_ASSERT(rw_lock->state == ReaderWriterLockType::State_Initialized);
|
|
AMS_ABORT_UNLESS(rw_lock->owner_thread == impl::GetCurrentThread());
|
|
return impl::ReaderWriterLockImpl::ReleaseWriteLock(rw_lock);
|
|
}
|
|
|
|
bool IsReadLockHeld(const ReaderWriterLockType *rw_lock) {
|
|
AMS_ASSERT(rw_lock->state == ReaderWriterLockType::State_Initialized);
|
|
return impl::GetReadLockCount(impl::GetLockCount(rw_lock)) != 0;
|
|
}
|
|
|
|
bool IsWriteLockHeldByCurrentThread(const ReaderWriterLockType *rw_lock) {
|
|
AMS_ASSERT(rw_lock->state == ReaderWriterLockType::State_Initialized);
|
|
return rw_lock->owner_thread == impl::GetCurrentThread() && impl::GetWriteLockCount(*rw_lock) != 0;
|
|
}
|
|
|
|
bool IsReaderWriterLockOwnerThread(const ReaderWriterLockType *rw_lock) {
|
|
AMS_ASSERT(rw_lock->state == ReaderWriterLockType::State_Initialized);
|
|
return rw_lock->owner_thread == impl::GetCurrentThread();
|
|
}
|
|
|
|
}
|