diff options
Diffstat (limited to 'vendor/google.golang.org/grpc/internal/grpcrand/grpcrand.go')
-rw-r--r-- | vendor/google.golang.org/grpc/internal/grpcrand/grpcrand.go | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/vendor/google.golang.org/grpc/internal/grpcrand/grpcrand.go b/vendor/google.golang.org/grpc/internal/grpcrand/grpcrand.go new file mode 100644 index 0000000..200b115 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/grpcrand/grpcrand.go | |||
@@ -0,0 +1,56 @@ | |||
1 | /* | ||
2 | * | ||
3 | * Copyright 2018 gRPC authors. | ||
4 | * | ||
5 | * Licensed under the Apache License, Version 2.0 (the "License"); | ||
6 | * you may not use this file except in compliance with the License. | ||
7 | * You may obtain a copy of the License at | ||
8 | * | ||
9 | * http://www.apache.org/licenses/LICENSE-2.0 | ||
10 | * | ||
11 | * Unless required by applicable law or agreed to in writing, software | ||
12 | * distributed under the License is distributed on an "AS IS" BASIS, | ||
13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
14 | * See the License for the specific language governing permissions and | ||
15 | * limitations under the License. | ||
16 | * | ||
17 | */ | ||
18 | |||
19 | // Package grpcrand implements math/rand functions in a concurrent-safe way | ||
20 | // with a global random source, independent of math/rand's global source. | ||
21 | package grpcrand | ||
22 | |||
23 | import ( | ||
24 | "math/rand" | ||
25 | "sync" | ||
26 | "time" | ||
27 | ) | ||
28 | |||
29 | var ( | ||
30 | r = rand.New(rand.NewSource(time.Now().UnixNano())) | ||
31 | mu sync.Mutex | ||
32 | ) | ||
33 | |||
34 | // Int63n implements rand.Int63n on the grpcrand global source. | ||
35 | func Int63n(n int64) int64 { | ||
36 | mu.Lock() | ||
37 | res := r.Int63n(n) | ||
38 | mu.Unlock() | ||
39 | return res | ||
40 | } | ||
41 | |||
42 | // Intn implements rand.Intn on the grpcrand global source. | ||
43 | func Intn(n int) int { | ||
44 | mu.Lock() | ||
45 | res := r.Intn(n) | ||
46 | mu.Unlock() | ||
47 | return res | ||
48 | } | ||
49 | |||
50 | // Float64 implements rand.Float64 on the grpcrand global source. | ||
51 | func Float64() float64 { | ||
52 | mu.Lock() | ||
53 | res := r.Float64() | ||
54 | mu.Unlock() | ||
55 | return res | ||
56 | } | ||