| // Copyright 2016 The etcd Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| // +build darwin |
| |
| package fileutil |
| |
| import ( |
| "os" |
| "syscall" |
| ) |
| |
| // Fsync on HFS/OSX flushes the data on to the physical drive but the drive |
| // may not write it to the persistent media for quite sometime and it may be |
| // written in out-of-order sequence. Using F_FULLFSYNC ensures that the |
| // physical drive's buffer will also get flushed to the media. |
| func Fsync(f *os.File) error { |
| _, _, errno := syscall.Syscall(syscall.SYS_FCNTL, f.Fd(), uintptr(syscall.F_FULLFSYNC), uintptr(0)) |
| if errno == 0 { |
| return nil |
| } |
| return errno |
| } |
| |
| // Fdatasync on darwin platform invokes fcntl(F_FULLFSYNC) for actual persistence |
| // on physical drive media. |
| func Fdatasync(f *os.File) error { |
| return Fsync(f) |
| } |