github.com/searKing/golang/go@v1.2.117/os/signal/signal_plan9.go (about)

     1  // Copyright 2020 The searKing Author. 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 signal
     6  
     7  import (
     8  	"os"
     9  	"syscall"
    10  )
    11  
    12  const numSig = 256
    13  
    14  func Signum(sig os.Signal) int {
    15  	switch sig := sig.(type) {
    16  	case syscall.Note:
    17  		n, ok := sigtab[sig]
    18  		if !ok {
    19  			n = len(sigtab) + 1
    20  			if n > numSig {
    21  				return -1
    22  			}
    23  			sigtab[sig] = n
    24  		}
    25  		return n
    26  	default:
    27  		return -1
    28  	}
    29  }