github.com/twelsh-aw/go/src@v0.0.0-20230516233729-a56fe86a7c81/runtime/os_linux_generic.go (about)

     1  // Copyright 2009 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  //go:build !mips && !mipsle && !mips64 && !mips64le && !s390x && !ppc64 && linux
     6  
     7  package runtime
     8  
     9  const (
    10  	_SS_DISABLE  = 2
    11  	_NSIG        = 65
    12  	_SIG_BLOCK   = 0
    13  	_SIG_UNBLOCK = 1
    14  	_SIG_SETMASK = 2
    15  )
    16  
    17  // It's hard to tease out exactly how big a Sigset is, but
    18  // rt_sigprocmask crashes if we get it wrong, so if binaries
    19  // are running, this is right.
    20  type sigset [2]uint32
    21  
    22  var sigset_all = sigset{^uint32(0), ^uint32(0)}
    23  
    24  //go:nosplit
    25  //go:nowritebarrierrec
    26  func sigaddset(mask *sigset, i int) {
    27  	(*mask)[(i-1)/32] |= 1 << ((uint32(i) - 1) & 31)
    28  }
    29  
    30  func sigdelset(mask *sigset, i int) {
    31  	(*mask)[(i-1)/32] &^= 1 << ((uint32(i) - 1) & 31)
    32  }
    33  
    34  //go:nosplit
    35  func sigfillset(mask *uint64) {
    36  	*mask = ^uint64(0)
    37  }