68 lines
1.5 KiB
Go
68 lines
1.5 KiB
Go
/*
|
|
*
|
|
* Copyright 2018 gRPC authors.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
*/
|
|
|
|
// Package grpcrand implements math/rand functions in a concurrent-safe way
|
|
// with a global random source, independent of math/rand's global source.
|
|
package grpcrand
|
|
|
|
import (
|
|
"math/rand"
|
|
"sync"
|
|
"time"
|
|
)
|
|
|
|
var (
|
|
r = rand.New(rand.NewSource(time.Now().UnixNano()))
|
|
mu sync.Mutex
|
|
)
|
|
|
|
// Int implements rand.Int on the grpcrand global source.
|
|
func Int() int {
|
|
mu.Lock()
|
|
defer mu.Unlock()
|
|
return r.Int()
|
|
}
|
|
|
|
// Int63n implements rand.Int63n on the grpcrand global source.
|
|
func Int63n(n int64) int64 {
|
|
mu.Lock()
|
|
defer mu.Unlock()
|
|
return r.Int63n(n)
|
|
}
|
|
|
|
// Intn implements rand.Intn on the grpcrand global source.
|
|
func Intn(n int) int {
|
|
mu.Lock()
|
|
defer mu.Unlock()
|
|
return r.Intn(n)
|
|
}
|
|
|
|
// Float64 implements rand.Float64 on the grpcrand global source.
|
|
func Float64() float64 {
|
|
mu.Lock()
|
|
defer mu.Unlock()
|
|
return r.Float64()
|
|
}
|
|
|
|
// Uint64 implements rand.Uint64 on the grpcrand global source.
|
|
func Uint64() uint64 {
|
|
mu.Lock()
|
|
defer mu.Unlock()
|
|
return r.Uint64()
|
|
}
|