vendor/github.com/aws/aws-sdk-go/internal/sdkrand/locked_source.go

   1 package sdkrand
   2
   3 import (
   4         "math/rand"
   5         "sync"
   6         "time"
   7 )
   8
   9 // lockedSource is a thread-safe implementation of rand.Source
  10 type lockedSource struct {
  11         lk  sync.Mutex
  12         src rand.Source
  13 }
  14
  15 func (r *lockedSource) Int63() (n int64) {
  16         r.lk.Lock()
  17         n = r.src.Int63()
  18         r.lk.Unlock()
  19         return
  20 }
  21
  22 func (r *lockedSource) Seed(seed int64) {
  23         r.lk.Lock()
  24         r.src.Seed(seed)
  25         r.lk.Unlock()
  26 }
  27
  28 // SeededRand is a new RNG using a thread safe implementation of rand.Source
  29 var SeededRand = rand.New(&lockedSource{src: rand.NewSource(time.Now().UnixNano())})