46 lines
1.3 KiB
Go
46 lines
1.3 KiB
Go
// Copyright 2020-2021 Buf Technologies, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package interrupt
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import (
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"context"
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"os"
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"os/signal"
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)
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// WithCancel returns a context that is cancelled if interrupt signals are sent.
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func WithCancel(ctx context.Context) (context.Context, context.CancelFunc) {
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signalC, closer := NewSignalChannel()
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ctx, cancel := context.WithCancel(ctx)
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go func() {
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<-signalC
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closer()
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cancel()
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}()
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return ctx, cancel
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}
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// NewSignalChannel returns a new channel for interrupt signals.
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//
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// Call the returned function to cancel sending to this channel.
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func NewSignalChannel() (<-chan os.Signal, func()) {
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signalC := make(chan os.Signal, 1)
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signal.Notify(signalC, signals...)
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return signalC, func() {
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signal.Stop(signalC)
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close(signalC)
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}
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}
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