blob: c2f39bf204d239ada2c1a5a90654e89b80af6b37 [file] [log] [blame]
khenaidoo59ce9dd2019-11-11 13:05:32 -05001// Copyright 2016 The etcd Authors
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15// +build darwin
16
17package fileutil
18
19import (
20 "os"
21 "syscall"
22)
23
24// Fsync on HFS/OSX flushes the data on to the physical drive but the drive
25// may not write it to the persistent media for quite sometime and it may be
26// written in out-of-order sequence. Using F_FULLFSYNC ensures that the
27// physical drive's buffer will also get flushed to the media.
28func Fsync(f *os.File) error {
29 _, _, errno := syscall.Syscall(syscall.SYS_FCNTL, f.Fd(), uintptr(syscall.F_FULLFSYNC), uintptr(0))
30 if errno == 0 {
31 return nil
32 }
33 return errno
34}
35
36// Fdatasync on darwin platform invokes fcntl(F_FULLFSYNC) for actual persistence
37// on physical drive media.
38func Fdatasync(f *os.File) error {
39 return Fsync(f)
40}