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https://github.com/golang/go
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60 lines
1001 B
Go
60 lines
1001 B
Go
// run
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// Copyright 2013 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 main
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import (
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"runtime"
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"sync"
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"sync/atomic"
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"time"
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)
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const N = 10
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var count int64
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func run() error {
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f1 := func() {}
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f2 := func() {
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func() {
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f1()
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}()
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}
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runtime.SetFinalizer(&f1, func(f *func()) {
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atomic.AddInt64(&count, -1)
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})
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go f2()
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return nil
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}
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func main() {
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// Does not work on 32-bits, or with gccgo, due to partially
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// conservative GC.
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// Try to enable when we have fully precise GC.
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if runtime.GOARCH != "amd64" || runtime.Compiler == "gccgo" {
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return
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}
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count = N
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var wg sync.WaitGroup
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wg.Add(N)
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for i := 0; i < N; i++ {
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go func() {
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run()
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wg.Done()
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}()
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}
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wg.Wait()
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for i := 0; i < 2*N; i++ {
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time.Sleep(10 * time.Millisecond)
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runtime.GC()
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}
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if count != 0 {
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println(count, "out of", N, "finalizer are not called")
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panic("not all finalizers are called")
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}
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}
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