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