mirror of
https://github.com/golang/go
synced 2024-11-05 21:36:12 -07:00
dc12d5b0f5
Makes sure the copyright notice is not interpreted as the package level godoc. Change-Id: I2afce7c9d620f19d51ec1438b1d0db1774b57146 Reviewed-on: https://go-review.googlesource.com/c/go/+/248760 Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Dave Cheney <dave@cheney.net>
66 lines
1.2 KiB
Go
66 lines
1.2 KiB
Go
// run
|
|
|
|
// Copyright 2016 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 main
|
|
|
|
import "runtime"
|
|
|
|
func main() {
|
|
{
|
|
x := inuse()
|
|
c := make(chan []byte, 10)
|
|
c <- make([]byte, 10<<20)
|
|
close(c)
|
|
f1(c, x)
|
|
}
|
|
{
|
|
x := inuse()
|
|
c := make(chan []byte, 10)
|
|
c <- make([]byte, 10<<20)
|
|
close(c)
|
|
f2(c, x)
|
|
}
|
|
}
|
|
|
|
func f1(c chan []byte, start int64) {
|
|
for x := range c {
|
|
if delta := inuse() - start; delta < 9<<20 {
|
|
println("BUG: f1: after alloc: expected delta at least 9MB, got: ", delta)
|
|
println(x)
|
|
}
|
|
x = nil
|
|
if delta := inuse() - start; delta > 1<<20 {
|
|
println("BUG: f1: after alloc: expected delta below 1MB, got: ", delta)
|
|
println(x)
|
|
}
|
|
}
|
|
}
|
|
|
|
func f2(c chan []byte, start int64) {
|
|
for {
|
|
x, ok := <-c
|
|
if !ok {
|
|
break
|
|
}
|
|
if delta := inuse() - start; delta < 9<<20 {
|
|
println("BUG: f2: after alloc: expected delta at least 9MB, got: ", delta)
|
|
println(x)
|
|
}
|
|
x = nil
|
|
if delta := inuse() - start; delta > 1<<20 {
|
|
println("BUG: f2: after alloc: expected delta below 1MB, got: ", delta)
|
|
println(x)
|
|
}
|
|
}
|
|
}
|
|
|
|
func inuse() int64 {
|
|
runtime.GC()
|
|
var st runtime.MemStats
|
|
runtime.ReadMemStats(&st)
|
|
return int64(st.Alloc)
|
|
}
|