22 lines
365 B
Go
22 lines
365 B
Go
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package utils
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import (
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"hash/fnv"
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"sync"
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)
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var hashMutex []*sync.Mutex
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func init() {
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for i := 0; i < 32; i++ {
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hashMutex = append(hashMutex, &sync.Mutex{})
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}
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}
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// HashLock Hash一样的图片不同时处理
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func HashLock(key string) *sync.Mutex {
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hash := fnv.New32()
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hash.Write([]byte(key))
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return hashMutex[int(hash.Sum32()%uint32(len(hashMutex)))]
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}
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