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/* FriBidi
* fribidi-mem.c - memory manipulation routines
*
* $Id: fribidi-mem.c,v 1.8 2006/01/31 03:23:13 behdad Exp $
* $Author: behdad $
* $Date: 2006/01/31 03:23:13 $
* $Revision: 1.8 $
* $Source: /cvs/fribidi/fribidi2/lib/fribidi-mem.c,v $
*
* Authors:
* Behdad Esfahbod, 2001, 2002, 2004
*
* Copyright (C) 2004 Sharif FarsiWeb, Inc
* Copyright (C) 2001,2002 Behdad Esfahbod
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library, in a file named COPYING; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA
*
* For licensing issues, contact <license@farsiweb.info>.
*/
#include "common.h"
#include "mem.h"
#if FRIBIDI_USE_GLIB+0
#else
#if USE_SIMPLE_MALLOC+0
#else
struct _FriBidiMemChunk
{
int atom_size;
int area_size;
int empty_size;
void *chunk;
};
FriBidiMemChunk *
fribidi_mem_chunk_new (
/* input */
const char *name,
int atom_size,
unsigned long area_size,
int alloc_type
)
{
register FriBidiMemChunk *m;
fribidi_assert (area_size >= atom_size * 8);
m = (FriBidiMemChunk *) fribidi_malloc (sizeof (FriBidiMemChunk));
if LIKELY
(m)
{
m->atom_size = atom_size;
m->area_size = area_size;
m->empty_size = 0;
m->chunk = NULL;
}
return m;
}
void *
fribidi_mem_chunk_alloc (
/* input */
FriBidiMemChunk *mem_chunk
)
{
fribidi_assert (mem_chunk);
if UNLIKELY
(mem_chunk->empty_size < mem_chunk->atom_size)
{
register void *chunk = fribidi_malloc (mem_chunk->area_size);
if LIKELY
(chunk)
{
if (mem_chunk->chunk)
*(void **) chunk =
(char *) mem_chunk->chunk + mem_chunk->empty_size -
mem_chunk->area_size;
chunk = (char *) chunk + mem_chunk->atom_size;
mem_chunk->chunk = chunk;
mem_chunk->empty_size = mem_chunk->area_size - mem_chunk->atom_size;
}
else
return NULL;
}
{
register void *m = mem_chunk->chunk;
mem_chunk->chunk = (char *) mem_chunk->chunk + mem_chunk->atom_size;
mem_chunk->empty_size -= mem_chunk->atom_size;
return m;
}
}
void
fribidi_mem_chunk_destroy (
/* input */
FriBidiMemChunk *mem_chunk
)
{
register void *chunk;
fribidi_assert (mem_chunk);
chunk =
(char *) mem_chunk->chunk + mem_chunk->empty_size - mem_chunk->area_size;
while LIKELY
(chunk)
{
register void *tofree = chunk;
chunk = *(void **) chunk;
fribidi_free (tofree);
}
fribidi_free (mem_chunk);
}
#endif /* !USE_SIMPLE_MALLOC */
#endif /* !FRIBIDI_USE_GLIB */
/* Editor directions:
* vim:textwidth=78:tabstop=8:shiftwidth=2:autoindent:cindent
*/
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