go signal 源码

golang signal 代码

文件路径：/src/cmd/go/internal/base/signal.go

// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package base

import (
	"os"
	"os/signal"
	"sync"
)

// Interrupted is closed when the go command receives an interrupt signal.
var Interrupted = make(chan struct{})

// processSignals setups signal handler.
func processSignals() {
	sig := make(chan os.Signal, 1)
	signal.Notify(sig, signalsToIgnore...)
	go func() {
		<-sig
		close(Interrupted)
	}()
}

var onceProcessSignals sync.Once

// StartSigHandlers starts the signal handlers.
func StartSigHandlers() {
	onceProcessSignals.Do(processSignals)
}

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