mirror of
https://github.com/golang/go
synced 2024-11-06 22:46:14 -07:00
22 lines
421 B
Go
22 lines
421 B
Go
|
// Copyright 2017 The Go Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
package mysync
|
||
|
|
|
||
|
|
import "runtime"
|
||
|
|
|
||
|
|
type WaitGroup struct {
|
||
|
|
Callers []uintptr
|
||
|
|
}
|
||
|
|
|
||
|
|
func (wg *WaitGroup) Add(x int) {
|
||
|
|
wg.Callers = make([]uintptr, 32)
|
||
|
|
n := runtime.Callers(1, wg.Callers)
|
||
|
|
wg.Callers = wg.Callers[:n]
|
||
|
|
}
|
||
|
|
|
||
|
|
func (wg *WaitGroup) Done() {
|
||
|
|
wg.Add(-1)
|
||
|
|
}
|