1 // Copyright 2016 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package race_test 6 7 import ( 8 "sync" 9 "testing" 10 "time" 11 ) 12 13 func TestRacePool(t *testing.T) { 14 // Pool randomly drops the argument on the floor during Put. 15 // Repeat so that at least one iteration gets reuse. 16 for i := 0; i < 10; i++ { 17 c := make(chan int) 18 p := &sync.Pool{New: func() interface{} { return make([]byte, 10) }} 19 x := p.Get().([]byte) 20 x[0] = 1 21 p.Put(x) 22 go func() { 23 y := p.Get().([]byte) 24 y[0] = 2 25 c <- 1 26 }() 27 x[0] = 3 28 <-c 29 } 30 } 31 32 func TestNoRacePool(t *testing.T) { 33 for i := 0; i < 10; i++ { 34 p := &sync.Pool{New: func() interface{} { return make([]byte, 10) }} 35 x := p.Get().([]byte) 36 x[0] = 1 37 p.Put(x) 38 go func() { 39 y := p.Get().([]byte) 40 y[0] = 2 41 p.Put(y) 42 }() 43 time.Sleep(100 * time.Millisecond) 44 x = p.Get().([]byte) 45 x[0] = 3 46 } 47 } 48
