File: race_test.go

package info (click to toggle)
gcc-arm-none-eabi 15%3A14.2.rel1-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,099,328 kB
  • sloc: cpp: 3,627,108; ansic: 2,571,498; ada: 834,230; f90: 235,082; makefile: 79,231; asm: 74,984; xml: 51,692; exp: 39,736; sh: 33,298; objc: 15,629; python: 15,069; fortran: 14,429; pascal: 7,003; awk: 5,070; perl: 3,106; ml: 285; lisp: 253; lex: 204; haskell: 135
file content (49 lines) | stat: -rw-r--r-- 1,117 bytes parent folder | download | duplicates (22) 
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)
	}
}