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Atmosphere/libraries/libstratosphere/include/stratosphere/os/os_semaphore.hpp

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/*
* 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 "os_mutex.hpp"
#include "os_condvar.hpp"
namespace ams::os {
namespace impl {
class WaitableObjectList;
class WaitableHolderOfSemaphore;
}
class Semaphore {
friend class impl::WaitableHolderOfSemaphore;
NON_COPYABLE(Semaphore);
NON_MOVEABLE(Semaphore);
private:
util::TypedStorage<impl::WaitableObjectList, sizeof(util::IntrusiveListNode), alignof(util::IntrusiveListNode)> waitlist;
os::Mutex mutex;
os::ConditionVariable condvar;
int count;
int max_count;
public:
explicit Semaphore(int c, int mc);
~Semaphore();
void Acquire();
bool TryAcquire();
bool TimedAcquire(u64 timeout);
void Release();
void Release(int count);
constexpr inline int GetCurrentCount() const {
return this->count;
}
};
}