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