libgo/go/cmd/go/signal.go

   1 // Copyright 2012 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 package main
   6
   7 import (
   8         "os"
   9         "os/signal"
  10         "sync"
  11 )
  12
  13 // interrupted is closed, if go process is interrupted.
  14 var interrupted = make(chan struct{})
  15
  16 // processSignals setups signal handler.
  17 func processSignals() {
  18         sig := make(chan os.Signal)
  19         signal.Notify(sig, signalsToIgnore...)
  20         go func() {
  21                 <-sig
  22                 close(interrupted)
  23         }()
  24 }
  25
  26 var onceProcessSignals sync.Once
  27
  28 // startSigHandlers start signal handlers.
  29 func startSigHandlers() {
  30         onceProcessSignals.Do(processSignals)
  31 }