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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA */
/* Open a temporary file and cache it with io_cache. Delete it on close */
#include "mysys_priv.h"
/*
** Open a cached tempfile by IO_CACHE
** Should be used when no seeks are done (only reinit_io_buff)
** Return 0 if cache is inited ok
** The actual file is created when the IO_CACHE buffer gets filled
*/
my_bool open_cached_file(IO_CACHE *cache, const char* dir, const char *prefix,
uint cache_size, myf cache_myflags)
{
DBUG_ENTER("open_cached_file");
cache->buffer=0; /* Mark that not open */
if (!(cache->file_name=my_tempnam(dir,prefix,MYF(MY_WME))))
DBUG_RETURN(1);
if (!init_io_cache(cache,-1,cache_size,WRITE_CACHE,0L,0,
MYF(cache_myflags | MY_NABP)))
{
DBUG_RETURN(0);
}
(*free)(cache->file_name); /* my_tempnam uses malloc() */
cache->file_name=0;
DBUG_RETURN(0);
}
my_bool real_open_cached_file(IO_CACHE *cache)
{
DBUG_ENTER("real_open_cached_file");
if ((cache->file=my_create(cache->file_name,0,
(int) (O_RDWR | O_BINARY | O_TRUNC | O_TEMPORARY |
O_SHORT_LIVED),
MYF(MY_WME))) >= 0)
{
#if O_TEMPORARY == 0 && !defined(CANT_DELETE_OPEN_FILES)
VOID(my_delete(cache->file_name,MYF(MY_WME | ME_NOINPUT)));
#endif
DBUG_RETURN(0);
}
DBUG_RETURN(1);
}
void close_cached_file(IO_CACHE *cache)
{
DBUG_ENTER("close_cached_file");
if (my_b_inited(cache))
{
VOID(end_io_cache(cache));
if (cache->file >= 0)
{
VOID(my_close(cache->file,MYF(MY_WME)));
#ifdef CANT_DELETE_OPEN_FILES
VOID(my_delete(cache->file_name,MYF(MY_WME | ME_NOINPUT)));
#endif
}
if (cache->file_name)
(*free)(cache->file_name); /* my_tempnam uses malloc() */
}
DBUG_VOID_RETURN;
}
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