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/* alloc.c -- memory allocation
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This file is part of the UCL data compression library.
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Copyright (C) 1996-2002 Markus Franz Xaver Johannes Oberhumer
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All Rights Reserved.
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The UCL library is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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The UCL 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with the UCL library; see the file COPYING.
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If not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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Markus F.X.J. Oberhumer
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<markus@oberhumer.com>
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http://www.oberhumer.com/opensource/ucl/
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*/
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#include "ucl_conf.h"
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#if defined(HAVE_MALLOC_H)
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# include <malloc.h>
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#endif
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#if defined(__palmos__)
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# include <System/MemoryMgr.h>
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#endif
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#undef ucl_alloc_hook
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#undef ucl_free_hook
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#undef ucl_alloc
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#undef ucl_malloc
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#undef ucl_free
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/***********************************************************************
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// implementation
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************************************************************************/
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UCL_PRIVATE(ucl_voidp)
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ucl_alloc_internal(ucl_uint nelems, ucl_uint size)
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{
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ucl_voidp p = NULL;
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unsigned long s = (unsigned long) nelems * size;
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if (nelems <= 0 || size <= 0 || s < nelems || s < size)
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return NULL;
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#if defined(__palmos__)
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p = (ucl_voidp) MemPtrNew(s);
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#elif (UCL_UINT_MAX <= SIZE_T_MAX)
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if (s < SIZE_T_MAX)
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p = (ucl_voidp) malloc((size_t)s);
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#elif defined(HAVE_HALLOC) && defined(__DMC__)
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if (size < SIZE_T_MAX)
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p = (ucl_voidp) _halloc(nelems,(size_t)size);
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#elif defined(HAVE_HALLOC)
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if (size < SIZE_T_MAX)
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p = (ucl_voidp) halloc(nelems,(size_t)size);
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#else
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if (s < SIZE_T_MAX)
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p = (ucl_voidp) malloc((size_t)s);
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#endif
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return p;
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}
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UCL_PRIVATE(void)
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ucl_free_internal(ucl_voidp p)
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{
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if (!p)
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return;
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#if defined(__palmos__)
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MemPtrFree(p);
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#elif (UCL_UINT_MAX <= SIZE_T_MAX)
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free(p);
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#elif defined(HAVE_HALLOC) && defined(__DMC__)
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_hfree(p);
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#elif defined(HAVE_HALLOC)
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hfree(p);
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#else
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free(p);
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#endif
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}
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/***********************************************************************
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// public interface using the global hooks
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************************************************************************/
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/* global allocator hooks */
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ucl_alloc_hook_t ucl_alloc_hook = ucl_alloc_internal;
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ucl_free_hook_t ucl_free_hook = ucl_free_internal;
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UCL_PUBLIC(ucl_voidp)
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ucl_alloc(ucl_uint nelems, ucl_uint size)
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{
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if (!ucl_alloc_hook)
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return NULL;
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return ucl_alloc_hook(nelems,size);
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}
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UCL_PUBLIC(ucl_voidp)
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ucl_malloc(ucl_uint size)
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{
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if (!ucl_alloc_hook)
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return NULL;
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#if defined(__palmos__)
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return ucl_alloc_hook(size,1);
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#elif (UCL_UINT_MAX <= SIZE_T_MAX)
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return ucl_alloc_hook(size,1);
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#elif defined(HAVE_HALLOC)
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/* use segment granularity by default */
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if (size + 15 > size) /* avoid overflow */
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return ucl_alloc_hook((size+15)/16,16);
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return ucl_alloc_hook(size,1);
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#else
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return ucl_alloc_hook(size,1);
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#endif
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}
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UCL_PUBLIC(void)
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ucl_free(ucl_voidp p)
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{
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if (!ucl_free_hook)
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return;
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ucl_free_hook(p);
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}
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/*
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vi:ts=4:et
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*/
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