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signal.go
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signal.go
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package signal
import (
"fmt"
"github.com/DSiSc/craft/log"
"os"
"os/signal"
)
type signalHandler func(s os.Signal, arg interface{})
type SignalSet struct {
m map[os.Signal]signalHandler
}
func NewSignalSet() *SignalSet {
ss := new(SignalSet)
ss.m = make(map[os.Signal]signalHandler)
return ss
}
func (set *SignalSet) RegisterSysSignal(s os.Signal, handler signalHandler) {
if _, found := set.m[s]; !found {
set.m[s] = handler
return
}
log.Error("signal %v has register, please confirm.", s)
}
func (set *SignalSet) handle(sig os.Signal, arg interface{}) (err error) {
if _, found := set.m[sig]; found {
set.m[sig](sig, arg)
return nil
}
return fmt.Errorf("no handler available for signal %v", sig)
}
func (set *SignalSet) CatchSysSignal() {
for {
c := make(chan os.Signal)
var sigs []os.Signal
for sig := range set.m {
sigs = append(sigs, sig)
}
signal.Notify(c)
sig := <-c
err := set.handle(sig, nil)
if err != nil {
log.Warn("unknown signal received: %v.", sig)
}
}
}