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