mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 20:12:31 +01:00
196e852983
* remove unused (and not implemented) WRITE_NET type * remove cast in my_b_write() macro. my_b_* macros are function-like, casts are responsibility of the caller * replace hackish _my_b_write(info,0,0) with the explicit my_b_flush_io_cache() in my_b_write_byte() * remove unused my_b_fill_cache() * replace pbool -> my_bool * make internal IO_CACHE functions static * reformat comments, correct typos, remove obsolete comments (ISAM) * assert valid cache type in init_functions() * use IO_ROUND_DN() macro where appropriate * remove unused DBUG_EXECUTE_IF in _my_b_cache_write() * remove unnecessary __attribute__((unused)) * fix goto error in parse_file.cc * remove redundant reinit_io_cache() in uniques.cc * don't do reinit_io_cache() if the cache was not initialized in ma_check.c * extract duplicate functionality from various _my_b_*_read functions into a common wrapper. Same for _my_b_*_write * create _my_b_cache_write_r instead of having if's in _my_b_cache_write (similar to existing _my_b_cache_read and _my_b_cache_read_r) * don't call mysql_file_write() from my_b_flush_io_cache(), call info->write_function() instead
125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
/* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
|
|
|
|
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
|
|
|
|
/* Open a temporary file and cache it with io_cache. Delete it on close */
|
|
|
|
#include "mysys_priv.h"
|
|
#include <m_string.h>
|
|
#include "my_static.h"
|
|
#include "mysys_err.h"
|
|
|
|
/**
|
|
Remove an open tempfile so that it doesn't survive if we crash
|
|
|
|
If the operating system doesn't support this, just remember
|
|
the file name for later removal
|
|
*/
|
|
|
|
static my_bool cache_remove_open_tmp(IO_CACHE *cache __attribute__((unused)),
|
|
const char *name)
|
|
{
|
|
#if O_TEMPORARY == 0
|
|
#if !defined(CANT_DELETE_OPEN_FILES)
|
|
/* The following should always succeed */
|
|
(void) my_delete(name,MYF(MY_WME | ME_NOINPUT));
|
|
#else
|
|
int length;
|
|
if (!(cache->file_name=
|
|
(char*) my_malloc((length=strlen(name)+1),MYF(MY_WME))))
|
|
{
|
|
my_close(cache->file,MYF(0));
|
|
cache->file = -1;
|
|
errno=my_errno=ENOMEM;
|
|
return 1;
|
|
}
|
|
memcpy(cache->file_name,name,length);
|
|
#endif
|
|
#endif /* O_TEMPORARY == 0 */
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
Open tempfile cached 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
|
|
If dir is not given, use TMPDIR.
|
|
*/
|
|
my_bool open_cached_file(IO_CACHE *cache, const char* dir, const char *prefix,
|
|
size_t cache_size, myf cache_myflags)
|
|
{
|
|
DBUG_ENTER("open_cached_file");
|
|
cache->dir= dir;
|
|
if (prefix)
|
|
{
|
|
DBUG_ASSERT(strlen(prefix) == 2);
|
|
memcpy(cache->prefix, prefix, 3);
|
|
}
|
|
else
|
|
cache->prefix[0]= 0;
|
|
cache->file_name=0;
|
|
cache->buffer=0; /* Mark that not open */
|
|
if (!init_io_cache(cache, -1, cache_size, WRITE_CACHE, 0L, 0,
|
|
MYF(cache_myflags | MY_NABP)))
|
|
{
|
|
DBUG_RETURN(0);
|
|
}
|
|
DBUG_RETURN(1);
|
|
}
|
|
|
|
/**
|
|
Create the temporary file
|
|
*/
|
|
my_bool real_open_cached_file(IO_CACHE *cache)
|
|
{
|
|
char name_buff[FN_REFLEN];
|
|
int error=1;
|
|
DBUG_ENTER("real_open_cached_file");
|
|
if ((cache->file=create_temp_file(name_buff, cache->dir,
|
|
cache->prefix[0] ? cache->prefix : 0,
|
|
(O_RDWR | O_BINARY | O_TRUNC |
|
|
O_TEMPORARY | O_SHORT_LIVED),
|
|
MYF(MY_WME))) >= 0)
|
|
{
|
|
error=0;
|
|
cache_remove_open_tmp(cache, name_buff);
|
|
}
|
|
DBUG_RETURN(error);
|
|
}
|
|
|
|
|
|
void close_cached_file(IO_CACHE *cache)
|
|
{
|
|
DBUG_ENTER("close_cached_file");
|
|
if (my_b_inited(cache))
|
|
{
|
|
File file=cache->file;
|
|
cache->file= -1; /* Don't flush data */
|
|
(void) end_io_cache(cache);
|
|
if (file >= 0)
|
|
{
|
|
(void) my_close(file,MYF(0));
|
|
#ifdef CANT_DELETE_OPEN_FILES
|
|
if (cache->file_name)
|
|
{
|
|
(void) my_delete(cache->file_name,MYF(MY_WME | ME_NOINPUT));
|
|
my_free(cache->file_name);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
DBUG_VOID_RETURN;
|
|
}
|