33 lines
500 B
Go
33 lines
500 B
Go
package xkcd
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import (
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"math/rand"
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"sync"
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)
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var random *rand.Rand
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type lockedRandSource struct {
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lock sync.Mutex
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src rand.Source
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}
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// to satisfy rand.Source interface
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func (r *lockedRandSource) Int63() int64 {
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r.lock.Lock()
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ret := r.src.Int63()
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r.lock.Unlock()
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return ret
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}
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// to satisfy rand.Source interface
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func (r *lockedRandSource) Seed(seed int64) {
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r.lock.Lock()
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r.src.Seed(seed)
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r.lock.Unlock()
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}
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func randomInt(begin, end int) int {
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return random.Intn(end-begin) + begin
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}
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