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63c7b44ba8
General moving to keep kernel object types separate from the direct kernel code. Also essentially a preliminary cleanup before eliminating global kernel state in the kernel code.
78 lines
2.4 KiB
C++
78 lines
2.4 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 <vector>
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#include "common/common_types.h"
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#include "core/hle/kernel/object.h"
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#include "core/hle/result.h"
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// Address arbiters are an underlying kernel synchronization object that can be created/used via
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// supervisor calls (SVCs). They function as sort of a global lock. Typically, games/other CTR
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// applications use them as an underlying mechanism to implement thread-safe barriers, events, and
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// semaphores.
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// Kernel namespace
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namespace Kernel {
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class Thread;
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enum class ArbitrationType : u32 {
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Signal,
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WaitIfLessThan,
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DecrementAndWaitIfLessThan,
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WaitIfLessThanWithTimeout,
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DecrementAndWaitIfLessThanWithTimeout,
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};
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class AddressArbiter final : public Object {
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public:
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/**
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* Creates an address arbiter.
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*
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* @param name Optional name used for debugging.
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* @returns The created AddressArbiter.
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*/
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static SharedPtr<AddressArbiter> Create(std::string name = "Unknown");
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std::string GetTypeName() const override {
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return "Arbiter";
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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 const HandleType HANDLE_TYPE = HandleType::AddressArbiter;
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HandleType GetHandleType() const override {
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return HANDLE_TYPE;
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}
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std::string name; ///< Name of address arbiter object (optional)
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ResultCode ArbitrateAddress(SharedPtr<Thread> thread, ArbitrationType type, VAddr address,
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s32 value, u64 nanoseconds);
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private:
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AddressArbiter();
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~AddressArbiter() override;
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/// Puts the thread to wait on the specified arbitration address under this address arbiter.
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void WaitThread(SharedPtr<Thread> thread, VAddr wait_address);
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/// Resume all threads found to be waiting on the address under this address arbiter
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void ResumeAllThreads(VAddr address);
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/// Resume one thread found to be waiting on the address under this address arbiter and return
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/// the resumed thread.
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SharedPtr<Thread> ResumeHighestPriorityThread(VAddr address);
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/// Threads waiting for the address arbiter to be signaled.
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std::vector<SharedPtr<Thread>> waiting_threads;
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};
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} // namespace Kernel
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