55 lines
876 B
C++
55 lines
876 B
C++
|
// Copyright 2020 yuzu Emulator Project
|
||
|
|
// Licensed under GPLv2 or any later version
|
||
|
|
// Refer to the license.txt file included.
|
||
|
|
|
||
|
|
#include "common/spin_lock.h"
|
||
|
|
|
||
|
|
#if _MSC_VER
|
||
|
|
#include <intrin.h>
|
||
|
|
#if _M_AMD64
|
||
|
|
#define __x86_64__ 1
|
||
|
|
#endif
|
||
|
|
#if _M_ARM64
|
||
|
|
#define __aarch64__ 1
|
||
|
|
#endif
|
||
|
|
#else
|
||
|
|
#if __x86_64__
|
||
|
|
#include <xmmintrin.h>
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
namespace {
|
||
|
|
|
||
|
|
void ThreadPause() {
|
||
|
|
#if __x86_64__
|
||
|
|
_mm_pause();
|
||
|
|
#elif __aarch64__ && _MSC_VER
|
||
|
|
__yield();
|
||
|
|
#elif __aarch64__
|
||
|
|
asm("yield");
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
} // Anonymous namespace
|
||
|
|
|
||
|
|
namespace Common {
|
||
|
|
|
||
|
|
void SpinLock::lock() {
|
||
|
|
while (lck.test_and_set(std::memory_order_acquire)) {
|
||
|
|
ThreadPause();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void SpinLock::unlock() {
|
||
|
|
lck.clear(std::memory_order_release);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool SpinLock::try_lock() {
|
||
|
|
if (lck.test_and_set(std::memory_order_acquire)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace Common
|