backends/flint/flint_io.h

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00001 
00004 /* Copyright (C) 2006,2007 Olly Betts
00005  *
00006  * This program is free software; you can redistribute it and/or modify
00007  * it under the terms of the GNU General Public License as published by
00008  * the Free Software Foundation; either version 2 of the License, or
00009  * (at your option) any later version.
00010  *
00011  * This program is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  * GNU General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU General Public License
00017  * along with this program; if not, write to the Free Software
00018  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
00019  */
00020 
00021 #ifndef XAPIAN_INCLUDED_FLINT_IO_H
00022 #define XAPIAN_INCLUDED_FLINT_IO_H
00023 
00024 #include <sys/types.h>
00025 #include "safefcntl.h"
00026 #include "safeunistd.h"
00027 
00033 inline bool flint_io_sync(int fd)
00034 {
00035     // If we have it, prefer fdatasync() as it avoids updating the access time
00036     // so is probably a little more efficient.
00037 #if defined HAVE_FDATASYNC
00038     return fdatasync(fd) == 0;
00039 #elif defined HAVE_FSYNC
00040     return fsync(fd) == 0;
00041 #elif defined __WIN32__
00042     return _commit(fd) == 0;
00043 #else
00044 # error Cannot implement flint_io_sync() without fdatasync(), fsync(), or _commit()
00045 #endif
00046 }
00047 
00055 size_t flint_io_read(int fd, char * p, size_t n, size_t min);
00056 
00058 void flint_io_write(int fd, const char * p, size_t n);
00059 
00060 #endif

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