mirror of https://github.com/poanetwork/gecko.git
47 lines
988 B
Go
47 lines
988 B
Go
// (c) 2019-2020, Ava Labs, Inc. All rights reserved.
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// See the file LICENSE for licensing terms.
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package utils
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import (
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"os"
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"os/signal"
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)
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// HandleSignals calls f if the go runtime receives the any of the provided
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// signals with the received signal.
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//
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// If f is nil or there are no provided signals, then nil will be returned.
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// Otherwise, a signal channel will be returned that can be used to clear the
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// signals registed by this function by valling ClearSignals.
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func HandleSignals(f func(os.Signal), sigs ...os.Signal) chan<- os.Signal {
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if f == nil || len(sigs) == 0 {
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return nil
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}
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// register signals
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c := make(chan os.Signal, 1)
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for _, sig := range sigs {
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signal.Notify(c, sig)
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}
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go func() {
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for sig := range c {
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f(sig)
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}
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}()
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return c
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}
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// ClearSignals clears any signals that have been registered on the provided
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// channel and closes the channel.
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func ClearSignals(c chan<- os.Signal) {
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if c == nil {
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return
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}
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signal.Stop(c)
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close(c)
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}
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