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