libgo/syscalls/errstr_nor.go

   1 // errstr.go -- Error strings when there is no strerror_r.
   2
   3 // Copyright 2011 The Go Authors. All rights reserved.
   4 // Use of this source code is governed by a BSD-style
   5 // license that can be found in the LICENSE file.
   6
   7 package syscall
   8
   9 import (
  10         "sync"
  11         "unsafe"
  12 )
  13
  14 func libc_strerror(int) *byte __asm__ ("strerror")
  15
  16 var errstr_lock sync.Mutex
  17
  18 func Errstr(errno int) string {
  19         errstr_lock.Lock()
  20
  21         bp := libc_strerror(errno)
  22         b := (*[1000]byte)(unsafe.Pointer(bp))
  23         i := 0
  24         for b[i] != 0 {
  25                 i++
  26         }
  27         s := string(b[:i])
  28
  29         errstr_lock.Unlock()
  30
  31         return s
  32 }