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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 <memory>
#include <string>
#include <boost/serialization/export.hpp>
#include "common/common_types.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/resource_limit.h"
#include "core/hle/kernel/wait_object.h"
#include "core/hle/result.h"
namespace Kernel {
class Thread;
class Mutex final : public WaitObject {
public:
explicit Mutex(KernelSystem& kernel);
~Mutex() override;
std::string GetTypeName() const override {
return "Mutex";
}
std::string GetName() const override {
return name;
}
static constexpr HandleType HANDLE_TYPE = HandleType::Mutex;
HandleType GetHandleType() const override {
return HANDLE_TYPE;
}
std::shared_ptr<ResourceLimit> resource_limit;
int lock_count; ///< Number of times the mutex has been acquired
u32 priority; ///< The priority of the mutex, used for priority inheritance.
std::string name; ///< Name of mutex (optional)
std::shared_ptr<Thread> holding_thread; ///< Thread that has acquired the mutex
/**
* Elevate the mutex priority to the best priority
* among the priorities of all its waiting threads.
*/
void UpdatePriority();
bool ShouldWait(const Thread* thread) const override;
void Acquire(Thread* thread) override;
void AddWaitingThread(std::shared_ptr<Thread> thread) override;
void RemoveWaitingThread(Thread* thread) override;
/**
* Attempts to release the mutex from the specified thread.
* @param thread Thread that wants to release the mutex.
* @returns The result code of the operation.
*/
Result Release(Thread* thread);
private:
KernelSystem& kernel;
friend class boost::serialization::access;
template <class Archive>
void serialize(Archive& ar, const unsigned int);
};
/**
* Releases all the mutexes held by the specified thread
* @param thread Thread that is holding the mutexes
*/
void ReleaseThreadMutexes(Thread* thread);
} // namespace Kernel
BOOST_CLASS_EXPORT_KEY(Kernel::Mutex)
CONSTRUCT_KERNEL_OBJECT(Kernel::Mutex)
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