gtsocial-umbx

Unnamed repository; edit this file 'description' to name the repository.
Log | Files | Refs | README | LICENSE

grpcrand.go (1723B)

      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 // Int implements rand.Int on the grpcrand global source.
     35 func Int() int {
     36 	mu.Lock()
     37 	defer mu.Unlock()
     38 	return r.Int()
     39 }
     40 
     41 // Int63n implements rand.Int63n on the grpcrand global source.
     42 func Int63n(n int64) int64 {
     43 	mu.Lock()
     44 	defer mu.Unlock()
     45 	return r.Int63n(n)
     46 }
     47 
     48 // Intn implements rand.Intn on the grpcrand global source.
     49 func Intn(n int) int {
     50 	mu.Lock()
     51 	defer mu.Unlock()
     52 	return r.Intn(n)
     53 }
     54 
     55 // Int31n implements rand.Int31n on the grpcrand global source.
     56 func Int31n(n int32) int32 {
     57 	mu.Lock()
     58 	defer mu.Unlock()
     59 	return r.Int31n(n)
     60 }
     61 
     62 // Float64 implements rand.Float64 on the grpcrand global source.
     63 func Float64() float64 {
     64 	mu.Lock()
     65 	defer mu.Unlock()
     66 	return r.Float64()
     67 }
     68 
     69 // Uint64 implements rand.Uint64 on the grpcrand global source.
     70 func Uint64() uint64 {
     71 	mu.Lock()
     72 	defer mu.Unlock()
     73 	return r.Uint64()
     74 }