golang如何实现__sync_fetch_and_add，如c（gcc buildin）？

Question

在go的同步/原子库中，似乎c（gcc buildin）中没有像__sync_fetch_and_add这样的函数，它有

nutch parse

等

我们似乎只能通过func AddInt32(addr *int32, delta int32) (new int32) func AddInt64(addr *int64, delta int64) (new int64) func AddUint32(addr *uint32, delta uint32) (new uint32) func AddUint64(addr *uint64, delta uint64) (new uint64) func AddUintptr(addr *uintptr, delta uintptr) (new uintptr) func CompareAndSwapInt32(addr *int32, old, new int32) (swapped bool) func CompareAndSwapInt64(addr *int64, old, new int64) (swapped bool) ... 来实现它，是吗？

Answer 1

从AddXXX返回值中减去delta以获取原始值。