mirror of
https://github.com/MetaCubeX/mihomo.git
synced 2024-07-16 01:18:11 +00:00
27 lines
396 B
Go
27 lines
396 B
Go
|
//go:build !go1.22
|
||
|
|
|
||
|
|
package once
|
||
|
|
|
||
|
|
import (
|
||
|
|
"sync"
|
||
|
|
"sync/atomic"
|
||
|
|
"unsafe"
|
||
|
|
)
|
||
|
|
|
||
|
|
type Once struct {
|
||
|
|
done uint32
|
||
|
|
m sync.Mutex
|
||
|
|
}
|
||
|
|
|
||
|
|
func Done(once *sync.Once) bool {
|
||
|
|
// atomic visit sync.Once.done
|
||
|
|
return atomic.LoadUint32((*uint32)(unsafe.Pointer(once))) == 1
|
||
|
|
}
|
||
|
|
|
||
|
|
func Reset(once *sync.Once) {
|
||
|
|
o := (*Once)(unsafe.Pointer(once))
|
||
|
|
o.m.Lock()
|
||
|
|
defer o.m.Unlock()
|
||
|
|
atomic.StoreUint32(&o.done, 0)
|
||
|
|
}
|