29 lines
584 B
Go
29 lines
584 B
Go
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package passcall
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import (
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"sync"
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"time"
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)
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// Every is a helper function that will call the provided callback
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// function at most once every `passEvery` duration. If the function is called
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// more frequently than that, it will return nil and not call the callback.
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func Every[P, R any](passInterval time.Duration, cb func(P) R) func(P) R {
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var lastCall time.Time
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var lk sync.Mutex
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return func(param P) R {
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lk.Lock()
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defer lk.Unlock()
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if time.Since(lastCall) < passInterval {
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return *new(R)
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}
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defer func() {
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lastCall = time.Now()
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}()
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return cb(param)
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}
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}
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