diff options
| author | Fernando Sahmkow <fsahmkow27@gmail.com> | 2020-02-04 11:23:12 -0400 |
|---|---|---|
| committer | Fernando Sahmkow <fsahmkow27@gmail.com> | 2020-06-18 16:29:13 -0400 |
| commit | 13ed9438fb47d62663fb1ef367baac1a567b25b3 (patch) | |
| tree | 6b342b85f39bde149532d7af8a06186560221f31 /src/common/spin_lock.cpp | |
| parent | bfa6193eb9857d4e7e244382a3ffbaccca7b1031 (diff) | |
Common: Implement a basic SpinLock class
Diffstat (limited to 'src/common/spin_lock.cpp')
| -rw-r--r-- | src/common/spin_lock.cpp | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/common/spin_lock.cpp b/src/common/spin_lock.cpp new file mode 100644 index 0000000000..8077b78d28 --- /dev/null +++ b/src/common/spin_lock.cpp @@ -0,0 +1,46 @@ +// 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 thread_pause() { +#if __x86_64__ + _mm_pause(); +#elif __aarch64__ && _MSC_VER + __yield(); +#elif __aarch64__ + asm("yield"); +#endif +} + +} // namespace + +namespace Common { + +void SpinLock::lock() { + while (lck.test_and_set(std::memory_order_acquire)) + thread_pause(); +} + +void SpinLock::unlock() { + lck.clear(std::memory_order_release); +} + +} // namespace Common |