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/* 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; version 2 of the License.
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 */
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