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