77 lines
2.6 KiB
C++
77 lines
2.6 KiB
C++
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// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include <map>
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#include <vector>
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#include "common/common.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/semaphore.h"
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#include "core/hle/kernel/thread.h"
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namespace Kernel {
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class Semaphore : public Object {
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public:
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std::string GetTypeName() const override { return "Semaphore"; }
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std::string GetName() const override { return name; }
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static Kernel::HandleType GetStaticHandleType() { return Kernel::HandleType::Semaphore; }
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Kernel::HandleType GetHandleType() const override { return Kernel::HandleType::Semaphore; }
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u32 initial_count; ///< Number of reserved entries
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u32 max_count; ///< Maximum number of simultaneous holders the semaphore can have
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u32 current_usage; ///< Number of currently used entries in the semaphore
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std::vector<Handle> waiting_threads; ///< Threads that are waiting for the semaphore
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std::string name; ///< Name of semaphore (optional)
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ResultVal<bool> SyncRequest() override {
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// TODO(Subv): ImplementMe
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return MakeResult<bool>(false);
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}
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ResultVal<bool> WaitSynchronization() override {
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bool wait = current_usage == max_count;
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if (wait) {
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Kernel::WaitCurrentThread(WAITTYPE_SEMA, GetHandle());
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waiting_threads.push_back(GetCurrentThreadHandle());
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} else {
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++current_usage;
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}
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return MakeResult<bool>(wait);
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}
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};
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////////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Creates a semaphore
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* @param handle Reference to handle for the newly created semaphore
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* @param initial_count initial amount of times the semaphore is held
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* @param max_count maximum number of holders the semaphore can have
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* @param name Optional name of semaphore
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* @return Pointer to new Semaphore object
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*/
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Semaphore* CreateSemaphore(Handle& handle, u32 initial_count, u32 max_count, const std::string& name) {
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Semaphore* semaphore = new Semaphore;
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handle = Kernel::g_object_pool.Create(semaphore);
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semaphore->initial_count = semaphore->current_usage = initial_count;
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semaphore->max_count = max_count;
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semaphore->name = name;
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return semaphore;
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}
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Handle CreateSemaphore(u32 initial_count, u32 max_count, const std::string& name) {
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Handle handle;
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Semaphore* semaphore = CreateSemaphore(handle, initial_count, max_count, name);
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return handle;
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}
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} // namespace
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