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24 lines
572 B
Go
24 lines
572 B
Go
package datastore
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import (
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"strconv"
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"sync"
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)
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// HashLock holds a fixed length array of mutexes. This approach allows concurrent mailbox
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// access in most cases without requiring an infinite number of mutexes.
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type HashLock [4096]sync.RWMutex
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// Get returns a RWMutex based on the first 12 bits of the mailbox hash. Hash must be a hexidecimal
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// string of three or more characters.
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func (h *HashLock) Get(hash string) *sync.RWMutex {
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if len(hash) < 3 {
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return nil
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}
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i, err := strconv.ParseInt(hash[0:3], 16, 0)
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if err != nil {
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return nil
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}
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return &h[i]
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}
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