libgo/go/syscall/libcall_bsd.go

   1 // Copyright 2015 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 // +build darwin dragonfly freebsd netbsd openbsd solaris
   6
   7 // BSD library calls.
   8
   9 package syscall
  10
  11 import (
  12         "internal/race"
  13         "unsafe"
  14 )
  15
  16 //sys   sendfile(outfd int, infd int, offset *Offset_t, count int) (written int, err error)
  17 //sendfile(outfd _C_int, infd _C_int, offset *Offset_t, count Size_t) Ssize_t
  18 func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
  19         if race.Enabled {
  20                 race.ReleaseMerge(unsafe.Pointer(&ioSync))
  21         }
  22         var soff Offset_t
  23         var psoff *Offset_t
  24         if offset != nil {
  25                 soff = Offset_t(*offset)
  26                 psoff = &soff
  27         }
  28         written, err = sendfile(outfd, infd, psoff, count)
  29         if offset != nil {
  30                 *offset = int64(soff)
  31         }
  32         return
  33 }