Atmosphere/libraries/libmesosphere/include/mesosphere/kern_k_condition_variable.hpp
2021-04-11 03:42:16 -07:00

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1.9 KiB
C++

/*
* Copyright (c) 2018-2020 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/>.
*/
#pragma once
#include <mesosphere/kern_common.hpp>
#include <mesosphere/kern_k_thread.hpp>
#include <mesosphere/kern_k_scheduler.hpp>
namespace ams::kern {
class KConditionVariable {
public:
using ThreadTree = typename KThread::ConditionVariableThreadTreeType;
private:
ThreadTree m_tree;
public:
constexpr KConditionVariable() : m_tree() { /* ... */ }
/* Arbitration. */
Result SignalToAddress(KProcessAddress addr);
Result WaitForAddress(ams::svc::Handle handle, KProcessAddress addr, u32 value);
/* Condition variable. */
void Signal(uintptr_t cv_key, s32 count);
Result Wait(KProcessAddress addr, uintptr_t key, u32 value, s64 timeout);
private:
void SignalImpl(KThread *thread);
};
ALWAYS_INLINE void BeforeUpdatePriority(KConditionVariable::ThreadTree *tree, KThread *thread) {
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
tree->erase(tree->iterator_to(*thread));
}
ALWAYS_INLINE void AfterUpdatePriority(KConditionVariable::ThreadTree *tree, KThread *thread) {
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
tree->insert(*thread);
}
}