initial import

core/syncx/atomicfloat64.go

@@ -0,0 +1,40 @@
+package syncx
+
+import (
+	"math"
+	"sync/atomic"
+)
+
+type AtomicFloat64 uint64
+
+func NewAtomicFloat64() *AtomicFloat64 {
+	return new(AtomicFloat64)
+}
+
+func ForAtomicFloat64(val float64) *AtomicFloat64 {
+	f := NewAtomicFloat64()
+	f.Set(val)
+	return f
+}
+
+func (f *AtomicFloat64) Add(val float64) float64 {
+	for {
+		old := f.Load()
+		nv := old + val
+		if f.CompareAndSwap(old, nv) {
+			return nv
+		}
+	}
+}
+
+func (f *AtomicFloat64) CompareAndSwap(old, val float64) bool {
+	return atomic.CompareAndSwapUint64((*uint64)(f), math.Float64bits(old), math.Float64bits(val))
+}
+
+func (f *AtomicFloat64) Load() float64 {
+	return math.Float64frombits(atomic.LoadUint64((*uint64)(f)))
+}
+
+func (f *AtomicFloat64) Set(val float64) {
+	atomic.StoreUint64((*uint64)(f), math.Float64bits(val))
+}