mirror of
https://github.com/MariaDB/server.git
synced 2025-10-30 04:26:45 +03:00
77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
/* Copyright (C) 2003 MySQL AB
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
|
|
|
|
#include "mysys_priv.h"
|
|
#include "mysys_err.h"
|
|
#include <errno.h>
|
|
|
|
/*
|
|
Sync data in file to disk
|
|
|
|
SYNOPSIS
|
|
my_sync()
|
|
fd File descritor to sync
|
|
my_flags Flags (now only MY_WME is supported)
|
|
|
|
NOTE
|
|
If file system supports its, only file data is synced, not inode data.
|
|
|
|
MY_IGNORE_BADFD is useful when fd is "volatile" - not protected by a
|
|
mutex. In this case by the time of fsync(), fd may be already closed by
|
|
another thread, or even reassigned to a different file. With this flag -
|
|
MY_IGNORE_BADFD - such a situation will not be considered an error.
|
|
(which is correct behaviour, if we know that the other thread synced the
|
|
file before closing)
|
|
|
|
RETURN
|
|
0 ok
|
|
-1 error
|
|
*/
|
|
|
|
int my_sync(File fd, myf my_flags)
|
|
{
|
|
int res;
|
|
DBUG_ENTER("my_sync");
|
|
DBUG_PRINT("my",("Fd: %d my_flags: %d", fd, my_flags));
|
|
|
|
do
|
|
{
|
|
#if defined(HAVE_FDATASYNC)
|
|
res= fdatasync(fd);
|
|
#elif defined(HAVE_FSYNC)
|
|
res= fsync(fd);
|
|
#elif defined(__WIN__)
|
|
res= _commit(fd);
|
|
#else
|
|
res= 0; /* No sync (strange OS) */
|
|
#endif
|
|
} while (res == -1 && errno == EINTR);
|
|
|
|
if (res)
|
|
{
|
|
int er= errno;
|
|
if (!(my_errno= er))
|
|
my_errno= -1; /* Unknown error */
|
|
if ((my_flags & MY_IGNORE_BADFD) &&
|
|
(er == EBADF || er == EINVAL || er == EROFS))
|
|
res= 0;
|
|
else if (my_flags & MY_WME)
|
|
my_error(EE_SYNC, MYF(ME_BELL+ME_WAITTANG), my_filename(fd), my_errno);
|
|
}
|
|
DBUG_RETURN(res);
|
|
} /* my_sync */
|
|
|