initial import

core/syncx/spinlock.go

@@ -0,0 +1,24 @@
+package syncx
+
+import (
+	"runtime"
+	"sync/atomic"
+)
+
+type SpinLock struct {
+	lock uint32
+}
+
+func (sl *SpinLock) Lock() {
+	for !sl.TryLock() {
+		runtime.Gosched()
+	}
+}
+
+func (sl *SpinLock) TryLock() bool {
+	return atomic.CompareAndSwapUint32(&sl.lock, 0, 1)
+}
+
+func (sl *SpinLock) Unlock() {
+	atomic.StoreUint32(&sl.lock, 0)
+}