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/* Copyright (c) 2000, 2002, 2003, 2007 MySQL AB
Use is subject to license terms
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 Street, Fifth Floor, Boston, MA 02110-1335 USA */
#include "mysys_priv.h"
#include <stdarg.h>
#ifndef DBUG_OFF
/* Put a protected barrier after every element when using my_multi_malloc() */
#define ALLOC_BARRIER
#endif
/*
Malloc many pointers at the same time
Only ptr1 can be free'd, and doing this will free all
the memory allocated. ptr2, etc all point inside big allocated
memory area.
SYNOPSIS
my_multi_malloc()
myFlags Flags
ptr1, length1 Multiple arguments terminated by null ptr
ptr2, length2 ...
...
NULL
*/
void* my_multi_malloc(PSI_memory_key key, myf myFlags, ...)
{
va_list args;
char **ptr,*start,*res;
size_t tot_length,length;
DBUG_ENTER("my_multi_malloc");
va_start(args,myFlags);
tot_length=0;
while ((ptr=va_arg(args, char **)))
{
length=va_arg(args,uint);
tot_length+=ALIGN_SIZE(length);
#ifdef ALLOC_BARRIER
tot_length+= ALIGN_SIZE(1);
#endif
}
va_end(args);
if (!(start=(char *) my_malloc(key, tot_length,myFlags)))
DBUG_RETURN(0); /* purecov: inspected */
va_start(args,myFlags);
res=start;
while ((ptr=va_arg(args, char **)))
{
*ptr=res;
length=va_arg(args,uint);
res+=ALIGN_SIZE(length);
#ifdef ALLOC_BARRIER
TRASH_FREE(res, ALIGN_SIZE(1));
res+= ALIGN_SIZE(1);
#endif
}
va_end(args);
DBUG_RETURN((void*) start);
}
/*
Same as my_multi_malloc, but each entry can be over 4G
SYNOPSIS
my_multi_malloc()
myFlags Flags
ptr1, length1 Multiple arguments terminated by null ptr
ptr2, length2 ...
...
NULL
*/
void *my_multi_malloc_large(PSI_memory_key key, myf myFlags, ...)
{
va_list args;
char **ptr,*start,*res;
ulonglong tot_length,length;
DBUG_ENTER("my_multi_malloc");
va_start(args,myFlags);
tot_length=0;
while ((ptr=va_arg(args, char **)))
{
length=va_arg(args,ulonglong);
tot_length+=ALIGN_SIZE(length);
#ifdef ALLOC_BARRIER
tot_length+= ALIGN_SIZE(1);
#endif
}
va_end(args);
if (!(start=(char *) my_malloc(key, (size_t) tot_length, myFlags)))
DBUG_RETURN(0); /* purecov: inspected */
va_start(args,myFlags);
res=start;
while ((ptr=va_arg(args, char **)))
{
*ptr=res;
length=va_arg(args,ulonglong);
res+=ALIGN_SIZE(length);
#ifdef ALLOC_BARRIER
TRASH_FREE(res, ALIGN_SIZE(1));
res+= ALIGN_SIZE(1);
#endif
}
va_end(args);
DBUG_RETURN((void*) start);
}
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