mirror of
https://github.com/Atmosphere-NX/Atmosphere
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108 lines
3.4 KiB
C++
108 lines
3.4 KiB
C++
/*
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* Copyright (c) 2018-2020 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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#include "impl/os_timeout_helper.hpp"
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#include "impl/os_mutex_impl.hpp"
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namespace ams::os {
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void InitializeConditionVariable(ConditionVariableType *cv) {
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/* Construct object. */
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util::ConstructAt(cv->_storage);
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/* Mark initialized. */
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cv->state = ConditionVariableType::State_Initialized;
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}
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void FinalizeConditionVariable(ConditionVariableType *cv) {
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AMS_ASSERT(cv->state == ConditionVariableType::State_Initialized);
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/* Mark not initialized. */
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cv->state = ConditionVariableType::State_NotInitialized;
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/* Destroy objects. */
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util::DestroyAt(cv->_storage);
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}
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void SignalConditionVariable(ConditionVariableType *cv) {
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AMS_ASSERT(cv->state == ConditionVariableType::State_Initialized);
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GetReference(cv->_storage).Signal();
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}
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void BroadcastConditionVariable(ConditionVariableType *cv) {
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AMS_ASSERT(cv->state == ConditionVariableType::State_Initialized);
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GetReference(cv->_storage).Broadcast();
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}
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void WaitConditionVariable(ConditionVariableType *cv, MutexType *m) {
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AMS_ASSERT(cv->state == ConditionVariableType::State_Initialized);
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AMS_ASSERT(m->state == MutexType::State_Initialized);
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AMS_ASSERT(m->owner_thread == impl::GetCurrentThread());
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AMS_ASSERT(m->nest_count == 1);
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impl::PopAndCheckLockLevel(m);
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if ((--m->nest_count) == 0) {
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m->owner_thread = nullptr;
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}
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GetReference(cv->_storage).Wait(GetPointer(m->_storage));
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impl::PushAndCheckLockLevel(m);
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++m->nest_count;
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m->owner_thread = impl::GetCurrentThread();
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}
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ConditionVariableStatus TimedWaitConditionVariable(ConditionVariableType *cv, MutexType *m, TimeSpan timeout) {
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AMS_ASSERT(cv->state == ConditionVariableType::State_Initialized);
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AMS_ASSERT(m->state == MutexType::State_Initialized);
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AMS_ASSERT(m->owner_thread == impl::GetCurrentThread());
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AMS_ASSERT(m->nest_count == 1);
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AMS_ASSERT(timeout.GetNanoSeconds() >= 0);
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impl::PopAndCheckLockLevel(m);
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if ((--m->nest_count) == 0) {
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m->owner_thread = nullptr;
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}
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ConditionVariableStatus status;
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if (timeout == TimeSpan(0)) {
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GetReference(m->_storage).Leave();
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GetReference(m->_storage).Enter();
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status = ConditionVariableStatus::TimedOut;
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} else {
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impl::TimeoutHelper timeout_helper(timeout);
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status = GetReference(cv->_storage).TimedWait(GetPointer(m->_storage), timeout_helper);
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}
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impl::PushAndCheckLockLevel(m);
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++m->nest_count;
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m->owner_thread = impl::GetCurrentThread();
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return status;
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}
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}
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