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// 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 signal
import (
"os"
"syscall"
)
var sigtab = make(map[os.Signal]int)
// In sig.s; jumps to runtime.
func signal_disable(uint32)
func signal_enable(uint32)
func signal_ignore(uint32)
func signal_recv() string
func init() {
signal_enable(0) // first call - initialize
go loop()
}
func loop() {
for {
process(syscall.Note(signal_recv()))
}
}
const numSig = 256
func signum(sig os.Signal) int {
switch sig := sig.(type) {
case syscall.Note:
n, ok := sigtab[sig]
if !ok {
n = len(sigtab) + 1
if n > numSig {
return -1
}
sigtab[sig] = n
}
return n
default:
return -1
}
}
func enableSignal(sig int) {
signal_enable(uint32(sig))
}
func disableSignal(sig int) {
signal_disable(uint32(sig))
}
func ignoreSignal(sig int) {
signal_ignore(uint32(sig))
}
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