summaryrefslogtreecommitdiffstats
path: root/src/common/spin_lock.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/common/spin_lock.cpp')
-rw-r--r--src/common/spin_lock.cpp54
1 files changed, 54 insertions, 0 deletions
diff --git a/src/common/spin_lock.cpp b/src/common/spin_lock.cpp
new file mode 100644
index 000000000..c1524220f
--- /dev/null
+++ b/src/common/spin_lock.cpp
@@ -0,0 +1,54 @@
+// 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