66 lines
2 KiB
C++
66 lines
2 KiB
C++
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// Copyright 2018 Yuzu Emulator Team
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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/condition_variable.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/object_address_table.h"
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#include "core/hle/kernel/thread.h"
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namespace Kernel {
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ConditionVariable::ConditionVariable() {}
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ConditionVariable::~ConditionVariable() {}
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ResultVal<SharedPtr<ConditionVariable>> ConditionVariable::Create(VAddr guest_addr,
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VAddr mutex_addr,
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std::string name) {
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SharedPtr<ConditionVariable> condition_variable(new ConditionVariable);
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condition_variable->name = std::move(name);
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condition_variable->guest_addr = guest_addr;
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condition_variable->mutex_addr = mutex_addr;
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// Condition variables are referenced by guest address, so track this in the kernel
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g_object_address_table.Insert(guest_addr, condition_variable);
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return MakeResult<SharedPtr<ConditionVariable>>(std::move(condition_variable));
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}
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bool ConditionVariable::ShouldWait(Thread* thread) const {
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return GetAvailableCount() <= 0;
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}
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void ConditionVariable::Acquire(Thread* thread) {
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if (GetAvailableCount() <= 0)
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return;
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SetAvailableCount(GetAvailableCount() - 1);
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}
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ResultCode ConditionVariable::Release(s32 target) {
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if (target == -1) {
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// When -1, wake up all waiting threads
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SetAvailableCount(GetWaitingThreads().size());
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WakeupAllWaitingThreads();
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} else {
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// Otherwise, wake up just a single thread
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SetAvailableCount(target);
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WakeupWaitingThread(GetHighestPriorityReadyThread());
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}
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return RESULT_SUCCESS;
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}
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s32 ConditionVariable::GetAvailableCount() const {
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return Memory::Read32(guest_addr);
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}
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void ConditionVariable::SetAvailableCount(s32 value) const {
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Memory::Write32(guest_addr, value);
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}
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} // namespace Kernel
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