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https://github.com/golang/go
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77 lines
1.2 KiB
Go
77 lines
1.2 KiB
Go
// run
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// Copyright 2009 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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// Test basic operation of finalizers.
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package main
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import (
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"runtime"
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"time"
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)
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const N = 250
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type A struct {
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b *B
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n int
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}
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type B struct {
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n int
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}
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var i int
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var nfinal int
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var final [N]int
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// the unused return is to test finalizers with return values
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func finalA(a *A) (unused [N]int) {
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if final[a.n] != 0 {
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println("finalA", a.n, final[a.n])
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panic("fail")
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}
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final[a.n] = 1
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return
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}
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func finalB(b *B) {
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if final[b.n] != 1 {
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println("finalB", b.n, final[b.n])
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panic("fail")
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}
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final[b.n] = 2
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nfinal++
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}
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func nofinalB(b *B) {
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panic("nofinalB run")
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}
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func main() {
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runtime.GOMAXPROCS(4)
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for i = 0; i < N; i++ {
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b := &B{i}
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a := &A{b, i}
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c := new(B)
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runtime.SetFinalizer(c, nofinalB)
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runtime.SetFinalizer(b, finalB)
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runtime.SetFinalizer(a, finalA)
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runtime.SetFinalizer(c, nil)
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}
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for i := 0; i < N; i++ {
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runtime.GC()
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runtime.Gosched()
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time.Sleep(1e6)
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if nfinal >= N*8/10 {
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break
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}
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}
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if nfinal < N*8/10 {
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println("not enough finalizing:", nfinal, "/", N)
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panic("fail")
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}
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}
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