84 lines
2.3 KiB
C++
84 lines
2.3 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <memory>
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#include <string>
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#include <boost/serialization/export.hpp>
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#include "common/common_types.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/wait_object.h"
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#include "core/hle/result.h"
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namespace Kernel {
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class Thread;
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class Mutex final : public WaitObject {
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public:
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explicit Mutex(KernelSystem& kernel);
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~Mutex() override;
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std::string GetTypeName() const override {
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return "Mutex";
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}
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std::string GetName() const override {
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return name;
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}
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static constexpr HandleType HANDLE_TYPE = HandleType::Mutex;
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HandleType GetHandleType() const override {
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return HANDLE_TYPE;
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}
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int lock_count; ///< Number of times the mutex has been acquired
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u32 priority; ///< The priority of the mutex, used for priority inheritance.
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std::string name; ///< Name of mutex (optional)
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std::shared_ptr<Thread> holding_thread; ///< Thread that has acquired the mutex
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/**
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* Elevate the mutex priority to the best priority
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* among the priorities of all its waiting threads.
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*/
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void UpdatePriority();
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bool ShouldWait(const Thread* thread) const override;
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void Acquire(Thread* thread) override;
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void AddWaitingThread(std::shared_ptr<Thread> thread) override;
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void RemoveWaitingThread(Thread* thread) override;
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/**
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* Attempts to release the mutex from the specified thread.
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* @param thread Thread that wants to release the mutex.
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* @returns The result code of the operation.
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*/
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ResultCode Release(Thread* thread);
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private:
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KernelSystem& kernel;
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friend class boost::serialization::access;
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template <class Archive>
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void serialize(Archive& ar, const unsigned int file_version)
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{
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ar & boost::serialization::base_object<WaitObject>(*this);
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ar & lock_count;
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ar & priority;
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ar & name;
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ar & holding_thread;
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}
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};
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/**
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* Releases all the mutexes held by the specified thread
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* @param thread Thread that is holding the mutexes
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*/
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void ReleaseThreadMutexes(Thread* thread);
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} // namespace Kernel
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BOOST_CLASS_EXPORT_KEY(Kernel::Mutex)
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CONSTRUCT_KERNEL_OBJECT(Kernel::Mutex)
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