原子操作函数
分为下面系列函数,其中Xxx可以是Int32/Int64/Uint32/Uint64/Uintptr/Pointer其中一种。
1.SwapXxx系列:交换新旧值;
// SwapInt32 atomically stores new into *addr and returns the previous *addr value.
func SwapInt32(addr *int32, new int32) (old int32)
2.CompareAndSwapXxx系列:比较并交换;
// CompareAndSwapInt32 executes the compare-and-swap operation for an int32 value.
func CompareAndSwapInt32(addr *int32, old, new int32) (swapped bool)
3.AddXxx系列:加减;
// AddInt32 atomically adds delta to *addr and returns the new value.
func AddInt32(addr *int32, delta int32) (new int32)
4.LoadXxx系列:读取;
// LoadInt32 atomically loads *addr.
func LoadInt32(addr *int32) (val int32)
5.StoreXxx系列:保存;
// StoreInt32 atomically stores val into *addr.
func StoreInt32(addr *int32, val int32)
以上。
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