29 lines
404 B
Go
29 lines
404 B
Go
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package main
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import "sync"
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var (
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opMutexes = map[string]*sync.Mutex{}
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opsLock sync.Mutex
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)
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func opMutex[T any](key string, op func() (T, error)) (T, error) {
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lock := func() *sync.Mutex {
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opsLock.Lock()
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defer opsLock.Unlock()
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lock, ok := opMutexes[key]
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if !ok {
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lock = new(sync.Mutex)
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opMutexes[key] = lock
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}
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return lock
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}()
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lock.Lock()
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defer lock.Unlock()
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return op()
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}
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