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