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/* Copyright (C) 2000 MySQL AB
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include "config.h"
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include "drizzled/memory/multi_malloc.h"
#include "drizzled/definitions.h"
namespace drizzled
{
namespace memory
{
/*
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
multi_malloc()
zerofill Whether or not to fill with 0
ptr1, length1 Multiple arguments terminated by null ptr
ptr2, length2 ...
...
NULL
*/
void* multi_malloc(bool zerofill, ...)
{
va_list args;
void **ptr, *start;
char *res;
size_t tot_length,length;
va_start(args, zerofill);
tot_length=0;
while ((ptr=va_arg(args, void **)))
{
/*
* This must be unsigned int, not size_t.
* Otherwise, everything breaks.
*/
length=va_arg(args, unsigned int);
tot_length+=ALIGN_SIZE(length);
}
va_end(args);
if (!(start= malloc(tot_length)))
return(0);
if (zerofill)
memset(start, 0, tot_length);
va_start(args, zerofill);
res= static_cast<char *>(start);
while ((ptr=va_arg(args, void **)))
{
*ptr=res;
length=va_arg(args,unsigned int);
res+= ALIGN_SIZE(length);
}
va_end(args);
return start;
}
} /* namespace memory */
} /* namespace drizzled */
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