| // 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. |
| |
| package poll |
| |
| import ( |
| "syscall" |
| _ "unsafe" // for go:linkname |
| ) |
| |
| // Fsync invokes SYS_FCNTL with SYS_FULLFSYNC because |
| // on OS X, SYS_FSYNC doesn't fully flush contents to disk. |
| // See Issue #26650 as well as the man page for fsync on OS X. |
| func (fd *FD) Fsync() error { |
| if err := fd.incref(); err != nil { |
| return err |
| } |
| defer fd.decref() |
| |
| _, e1 := fcntl(fd.Sysfd, syscall.F_FULLFSYNC, 0) |
| return e1 |
| } |
| |
| // Implemented in syscall/syscall_darwin.go. |
| //go:linkname fcntl syscall.fcntl |
| func fcntl(fd int, cmd int, arg int) (int, error) |
