55 lines
879 B
C++
55 lines
879 B
C++
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// Copyright 2021 yuzu 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 "core/hle/kernel/k_spin_lock.h"
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#if _MSC_VER
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#include <intrin.h>
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#if _M_AMD64
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#define __x86_64__ 1
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#endif
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#if _M_ARM64
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#define __aarch64__ 1
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#endif
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#else
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#if __x86_64__
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#include <xmmintrin.h>
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#endif
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#endif
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namespace {
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void ThreadPause() {
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#if __x86_64__
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_mm_pause();
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#elif __aarch64__ && _MSC_VER
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__yield();
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#elif __aarch64__
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asm("yield");
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#endif
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}
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} // namespace
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namespace Kernel {
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void KSpinLock::Lock() {
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while (lck.test_and_set(std::memory_order_acquire)) {
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ThreadPause();
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}
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}
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void KSpinLock::Unlock() {
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lck.clear(std::memory_order_release);
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}
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bool KSpinLock::TryLock() {
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if (lck.test_and_set(std::memory_order_acquire)) {
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return false;
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}
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return true;
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}
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} // namespace Kernel
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