github.com/fisco-bcos/crypto@v0.0.0-20200202032121-bd8ab0b5d4f1/internal/poll/fd_fsync_posix.go (about)

     1  // Copyright 2018 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 aix dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris
     6  
     7  package poll
     8  
     9  import "syscall"
    10  
    11  // Fsync wraps syscall.Fsync.
    12  func (fd *FD) Fsync() error {
    13  	if err := fd.incref(); err != nil {
    14  		return err
    15  	}
    16  	defer fd.decref()
    17  	return syscall.Fsync(fd.Sysfd)
    18  }
    19  
    20  func fcntl(fd int, cmd int, arg int) (int, error) {
    21  	r, _, e := syscall.Syscall(syscall.SYS_FCNTL, uintptr(fd), uintptr(cmd), uintptr(arg))
    22  	if e != 0 {
    23  		return int(r), syscall.Errno(e)
    24  	}
    25  	return int(r), nil
    26  }