blob: e7d103664bba6fd7aca911c14eb3b8ac2a297596 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
// 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 rand_test
import (
. "math/rand"
"sync"
"testing"
)
// TestConcurrent exercises the rand API concurrently, triggering situations
// where the race detector is likely to detect issues.
func TestConcurrent(t *testing.T) {
const (
numRoutines = 10
numCycles = 10
)
var wg sync.WaitGroup
defer wg.Wait()
wg.Add(numRoutines)
for i := 0; i < numRoutines; i++ {
go func(i int) {
defer wg.Done()
buf := make([]byte, 997)
for j := 0; j < numCycles; j++ {
var seed int64
seed += int64(ExpFloat64())
seed += int64(Float32())
seed += int64(Float64())
seed += int64(Intn(Int()))
seed += int64(Int31n(Int31()))
seed += int64(Int63n(Int63()))
seed += int64(NormFloat64())
seed += int64(Uint32())
seed += int64(Uint64())
for _, p := range Perm(10) {
seed += int64(p)
}
Read(buf)
for _, b := range buf {
seed += int64(b)
}
Seed(int64(i*j) * seed)
}
}(i)
}
}
|
