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// 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 race_test
import (
"sync"
"testing"
"time"
)
func TestRacePool(t *testing.T) {
// Pool randomly drops the argument on the floor during Put.
// Repeat so that at least one iteration gets reuse.
for i := 0; i < 10; i++ {
c := make(chan int)
p := &sync.Pool{New: func() interface{} { return make([]byte, 10) }}
x := p.Get().([]byte)
x[0] = 1
p.Put(x)
go func() {
y := p.Get().([]byte)
y[0] = 2
c <- 1
}()
x[0] = 3
<-c
}
}
func TestNoRacePool(t *testing.T) {
for i := 0; i < 10; i++ {
p := &sync.Pool{New: func() interface{} { return make([]byte, 10) }}
x := p.Get().([]byte)
x[0] = 1
p.Put(x)
go func() {
y := p.Get().([]byte)
y[0] = 2
p.Put(y)
}()
time.Sleep(100 * time.Millisecond)
x = p.Get().([]byte)
x[0] = 3
}
}
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