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// 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)
}
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