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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <string>
#include <boost/serialization/export.hpp>
#include "common/common_types.h"
#include "core/hle/kernel/object.h"
#include "core/hle/kernel/wait_object.h"
#include "core/hle/result.h"
namespace Kernel {
class ResourceLimit;
class Semaphore final : public WaitObject {
public:
explicit Semaphore(KernelSystem& kernel);
~Semaphore() override;
std::string GetTypeName() const override {
return "Semaphore";
}
std::string GetName() const override {
return name;
}
static constexpr HandleType HANDLE_TYPE = HandleType::Semaphore;
HandleType GetHandleType() const override {
return HANDLE_TYPE;
}
std::shared_ptr<ResourceLimit> resource_limit;
s32 max_count; ///< Maximum number of simultaneous holders the semaphore can have
s32 available_count; ///< Number of free slots left in the semaphore
std::string name; ///< Name of semaphore (optional)
bool ShouldWait(const Thread* thread) const override;
void Acquire(Thread* thread) override;
/**
* Releases a certain number of slots from a semaphore.
* @param release_count The number of slots to release
* @return The number of free slots the semaphore had before this call
*/
Result Release(s32* out_count, s32 release_count);
private:
friend class boost::serialization::access;
template <class Archive>
void serialize(Archive& ar, const unsigned int);
};
} // namespace Kernel
BOOST_CLASS_EXPORT_KEY(Kernel::Semaphore)
CONSTRUCT_KERNEL_OBJECT(Kernel::Semaphore)
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