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# Conflicts: # src/core/CMakeLists.txt # src/core/arm/dynarmic/arm_dynarmic.cpp # src/core/arm/dyncom/arm_dyncom.cpp # src/core/hle/kernel/process.cpp # src/core/hle/kernel/thread.cpp # src/core/hle/kernel/thread.h # src/core/hle/kernel/vm_manager.cpp # src/core/loader/3dsx.cpp # src/core/loader/elf.cpp # src/core/loader/ncch.cpp # src/core/memory.cpp # src/core/memory.h # src/core/memory_setup.h
56 lines
1.5 KiB
C++
56 lines
1.5 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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#include "common/assert.h"
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#include "core/hle/kernel/errors.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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Semaphore::Semaphore() {}
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Semaphore::~Semaphore() {}
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ResultVal<SharedPtr<Semaphore>> Semaphore::Create(s32 initial_count, s32 max_count, VAddr address,
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std::string name) {
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if (initial_count > max_count)
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return ERR_INVALID_COMBINATION_KERNEL;
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SharedPtr<Semaphore> semaphore(new Semaphore);
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// When the semaphore is created, some slots are reserved for other threads,
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// and the rest is reserved for the caller thread
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semaphore->max_count = max_count;
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semaphore->available_count = initial_count;
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semaphore->address = address;
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semaphore->name = std::move(name);
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return MakeResult<SharedPtr<Semaphore>>(std::move(semaphore));
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}
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bool Semaphore::ShouldWait(Thread* thread) const {
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return available_count <= 0;
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}
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void Semaphore::Acquire(Thread* thread) {
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if (available_count <= 0)
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return;
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--available_count;
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}
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ResultVal<s32> Semaphore::Release(s32 release_count) {
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if (max_count - available_count < release_count)
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return ERR_OUT_OF_RANGE_KERNEL;
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s32 previous_count = available_count;
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available_count += release_count;
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WakeupAllWaitingThreads();
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return MakeResult<s32>(previous_count);
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}
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} // namespace
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