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/*
*
* 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
)
// Int63n implements rand.Int63n on the grpcrand global source.
func Int63n(n int64) int64 {
mu.Lock()
res := r.Int63n(n)
mu.Unlock()
return res
}
// Intn implements rand.Intn on the grpcrand global source.
func Intn(n int) int {
mu.Lock()
res := r.Intn(n)
mu.Unlock()
return res
}
// Float64 implements rand.Float64 on the grpcrand global source.
func Float64() float64 {
mu.Lock()
res := r.Float64()
mu.Unlock()
return res
}
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