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package atomic
import "sync/atomic"
type AtomicInt64 struct {
val * atomic . Int64
}
func NewAtomicInt64 ( ) * AtomicInt64 {
return & AtomicInt64 { val : & atomic . Int64 { } }
}
func ( a * AtomicInt64 ) Reset ( ) {
a . val . Store ( 0 )
}
// AddAndGet 以原子方式将当前值+delta, 并返回+delta之后的值
func ( a * AtomicInt64 ) AddAndGet ( delta int64 ) int64 {
return a . val . Add ( delta )
}
// GetAndAdd 以原子方式将当前值+delta, 并返回+delta之前的值
func ( a * AtomicInt64 ) GetAndAdd ( delta int64 ) int64 {
tmp := a . val . Load ( )
a . val . Add ( delta )
return tmp
}
// UpdateAndGet 以原子方式更新值,并返回更新后的值
func ( a * AtomicInt64 ) UpdateAndGet ( val int64 ) int64 {
a . val . Store ( val )
return val
}
// GetAndUpdate 以原子方式更新值,并返回更新前的值
func ( a * AtomicInt64 ) GetAndUpdate ( val int64 ) int64 {
tmp := a . val . Load ( )
a . val . Store ( val )
return tmp
}
// GetAndIncrement 以原子方式将当前值+1, 并返回+1前的值
func ( a * AtomicInt64 ) GetAndIncrement ( ) int64 {
return a . GetAndAdd ( 1 )
}
// GetAndDecrement 以原子方式将当前值-1, 并返回-1前的值
func ( a * AtomicInt64 ) GetAndDecrement ( ) int64 {
return a . GetAndAdd ( - 1 )
}
// IncrementAndGet 以原子方式将当前值+1, 并返回+1后的值
func ( a * AtomicInt64 ) IncrementAndGet ( ) int64 {
return a . AddAndGet ( 1 )
}
// DecrementAndGet 以原子方式将当前值-1, 并返回-1后的值
func ( a * AtomicInt64 ) DecrementAndGet ( ) int64 {
return a . AddAndGet ( - 1 )
}