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Diffstat (limited to '')
-rw-r--r-- | src/core/hle/service/mutex.cpp | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/core/hle/service/mutex.cpp b/src/core/hle/service/mutex.cpp new file mode 100644 index 000000000..b0ff71d1b --- /dev/null +++ b/src/core/hle/service/mutex.cpp @@ -0,0 +1,46 @@ +// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#include "core/core.h" +#include "core/hle/kernel/k_event.h" +#include "core/hle/kernel/k_synchronization_object.h" +#include "core/hle/service/mutex.h" + +namespace Service { + +Mutex::Mutex(Core::System& system) : m_system(system) { + m_event = Kernel::KEvent::Create(system.Kernel()); + m_event->Initialize(nullptr); + + // Register the event. + Kernel::KEvent::Register(system.Kernel(), m_event); + + ASSERT(R_SUCCEEDED(m_event->Signal())); +} + +Mutex::~Mutex() { + m_event->GetReadableEvent().Close(); + m_event->Close(); +} + +void Mutex::lock() { + // Infinitely retry until we successfully clear the event. + while (R_FAILED(m_event->GetReadableEvent().Reset())) { + s32 index; + Kernel::KSynchronizationObject* obj = &m_event->GetReadableEvent(); + + // The event was already cleared! + // Wait for it to become signaled again. + ASSERT(R_SUCCEEDED( + Kernel::KSynchronizationObject::Wait(m_system.Kernel(), &index, &obj, 1, -1))); + } + + // We successfully cleared the event, and now have exclusive ownership. +} + +void Mutex::unlock() { + // Unlock. + ASSERT(R_SUCCEEDED(m_event->Signal())); +} + +} // namespace Service |