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/*
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 * Copyright (c) 2002-2006 The TenDRA Project <http://www.tendra.org/>.
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions are met:
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 *
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 * 1. Redistributions of source code must retain the above copyright notice,
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 *    this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice,
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 *    this list of conditions and the following disclaimer in the documentation
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 *    and/or other materials provided with the distribution.
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 * 3. Neither the name of The TenDRA Project nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific, prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
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 * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
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 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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 * EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 *
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 * $Id$
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 */
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/*
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    		 Crown Copyright (c) 1997
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    This TenDRA(r) Computer Program is subject to Copyright
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    owned by the United Kingdom Secretary of State for Defence
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    acting through the Defence Evaluation and Research Agency
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    (DERA).  It is made available to Recipients with a
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    royalty-free licence for its use, reproduction, transfer
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    to other parties and amendment for any purpose not excluding
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    product development provided that any such use et cetera
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    shall be deemed to be acceptance of the following conditions:-
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        (1) Its Recipients shall ensure that this Notice is
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        reproduced upon any copies or amended versions of it;
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        (2) Any amended version of it shall be clearly marked to
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        show both the nature of and the organisation responsible
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        for the relevant amendment or amendments;
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        (3) Its onward transfer from a recipient to another
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        party shall be deemed to be that party's acceptance of
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        these conditions;
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        (4) DERA gives no warranty or assurance as to its
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        quality or suitability for any purpose and DERA accepts
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        no liability whatsoever in relation to any use to which
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        it may be put.
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*/
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/**** dalloc.c --- Memory allocation and deallocation.
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 *
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 ** Author: Steve Folkes <smf@hermes.mod.uk>
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 *
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 **** Commentary:
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 *
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 * This file implements the dynamic memory management facility specified in
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 * the file "dalloc.h".  See that file for more information.
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 *
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 **** Change Log:
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 * $Log: dalloc.c,v $
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 * Revision 1.1.1.1  1998/01/17  15:57:17  release
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 * First version to be checked into rolling release.
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 *
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 * Revision 1.2  1994/12/12  11:45:28  smf
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 * Performing changes for 'CR94_178.sid+tld-update' - bringing in line with
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 * OSSG C Coding Standards.
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 *
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 * Revision 1.1.1.1  1994/07/25  16:06:09  smf
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 * Initial import of os-interface shared files.
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 *
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**/
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/****************************************************************************/
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#include "dalloc.h"
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/*--------------------------------------------------------------------------*/
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ExceptionP XX_dalloc_no_memory = EXCEPTION("cannot allocate memory");
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/*--------------------------------------------------------------------------*/
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#ifdef PO_DALLOC_DEBUG_ALIGN
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#define DALLOC_MAGIC	0x21436587
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#define ALIGN(x)	(((int)(((x) + (PO_DALLOC_DEBUG_ALIGN) - 1) / \
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			 (PO_DALLOC_DEBUG_ALIGN))) * (PO_DALLOC_DEBUG_ALIGN))
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/*--------------------------------------------------------------------------*/
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typedef struct DallocDataT {
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    CStringP			file;
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    unsigned			line;
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    SizeT			size;
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    int				magic;
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} DallocDataT, *DallocDataP;
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/*--------------------------------------------------------------------------*/
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static SizeT dalloc_data_size = ALIGN(sizeof(DallocDataT));
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/*--------------------------------------------------------------------------*/
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#ifdef __NeXT__
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#undef TRUE
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#undef FALSE
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#include <mach/mach.h>
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/*--------------------------------------------------------------------------*/
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GenericP
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X__dalloc_allocate(SizeT    size,			    SizeT    length,
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			    CStringP file,
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			    unsigned line)
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{
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    GenericP tmp;
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    ASSERT(size != 0);
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    if (length == 0) {
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	tmp = NIL(GenericP);
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    } else {
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	SizeT        real_size = (((size)* length) + dalloc_data_size);
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	vm_address_t address;
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	DallocDataP  data;
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	ByteP        base;
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	if (vm_allocate(task_self(), &address,(vm_size_t)real_size,
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			 TRUE) != KERN_SUCCESS) {
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	    THROW(XX_dalloc_no_memory);
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	    UNREACHED;
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	}
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	data        = (DallocDataP)address;
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	base        = (ByteP)address;
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	tmp         = (base + dalloc_data_size);
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	data->file  = file;
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	data->line  = line;
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	data->size  = real_size;
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	data->magic = DALLOC_MAGIC;
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    }
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    return(tmp);
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}
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void
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X__dalloc_deallocate(GenericP ptr,			      CStringP file,
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			      unsigned line)
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{
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    if (ptr) {
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	ByteP         pointer = (ByteP)ptr;
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	DallocDataP   data    = (DallocDataP)(pointer - dalloc_data_size);
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	vm_address_t  address = (vm_address_t)data;
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	vm_size_t     size    = data->size;
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	kern_return_t result;
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	if (data->magic == 0) {
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	    E_dalloc_multi_deallocate(ptr, file, line, data->file,
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				       data->line);
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	    UNREACHED;
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	} else if (data->magic != DALLOC_MAGIC) {
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	    E_dalloc_corrupt_block(ptr, file, line);
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	    UNREACHED;
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	}
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	data->magic = 0;
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	result = vm_protect(task_self(), address, size, FALSE, VM_PROT_NONE);
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	ASSERT(result == KERN_SUCCESS);
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    }
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}
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#else
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GenericP
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X__dalloc_allocate(SizeT    size,			    SizeT    length,
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			    CStringP file,
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			    unsigned line)
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{
187 
    GenericP tmp;
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    ASSERT(size != 0);
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    if (length == 0) {
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	tmp = NIL(GenericP);
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    } else {
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	SizeT       real_size = ((size * length) + dalloc_data_size);
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	ByteP       base;
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	DallocDataP data;
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	if ((tmp = malloc(real_size)) == NIL(GenericP)) {
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	    THROW(XX_dalloc_no_memory);
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	    UNREACHED;
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	}
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	(void)memset(tmp, 0, real_size);
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	data        = tmp;
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	base        = tmp;
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	tmp         = (base + dalloc_data_size);
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	data->file  = file;
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	data->line  = line;
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	data->magic = DALLOC_MAGIC;
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    }
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    return(tmp);
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}
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void
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X__dalloc_deallocate(GenericP ptr,			      CStringP file,
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			      unsigned line)
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{
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    if (ptr) {
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	ByteP       pointer = (ByteP)ptr;
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	DallocDataP data    = (DallocDataP)(pointer - dalloc_data_size);
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	if (data->magic == 0) {
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	    E_dalloc_multi_deallocate(ptr, file, line, data->file,
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				       data->line);
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	    UNREACHED;
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	} else if (data->magic != DALLOC_MAGIC) {
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	    E_dalloc_corrupt_block(ptr, file, line);
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	    UNREACHED;
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	}
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	data->magic = 0;
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	free((GenericP)data);
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    }
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}
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233 
#endif /* defined (__NeXT__) */
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#else
236 
 
237 
GenericP
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X__dalloc_allocate(SizeT size,			    SizeT length)
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{
240 
    GenericP tmp;
241 
 
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    ASSERT(size != 0);
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    if (length == 0) {
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	tmp = NIL(GenericP);
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    } else if ((tmp = calloc(length, size)) == NIL(GenericP)) {
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	THROW(XX_dalloc_no_memory);
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	UNREACHED;
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    }
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    return(tmp);
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}
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#endif /* defined (PO_DALLOC_DEBUG_ALIGN) */