blob: 67b76f8311ca2dba9722dc4dc0d20fa040ca0460 [file] [log] [blame]
// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build aix dragonfly freebsd hurd js,wasm linux netbsd openbsd solaris
package poll
import "syscall"
// Use a helper function to call fcntl. This is defined in C in
// libgo/runtime.
//extern __go_fcntl_uintptr
func libc_fcntl(uintptr, uintptr, uintptr) (uintptr, uintptr)
// Fsync wraps syscall.Fsync.
func (fd *FD) Fsync() error {
if err := fd.incref(); err != nil {
return err
defer fd.decref()
return syscall.Fsync(fd.Sysfd)
func fcntl(fd int, cmd int, arg int) (int, error) {
r, e := libc_fcntl(uintptr(fd), uintptr(cmd), uintptr(arg))
if e != 0 {
return int(r), syscall.Errno(e)
return int(r), nil