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/*
Crown Copyright (c) 1997
This TenDRA(r) Computer Program is subject to Copyright
owned by the United Kingdom Secretary of State for Defence
acting through the Defence Evaluation and Research Agency
(DERA). It is made available to Recipients with a
royalty-free licence for its use, reproduction, transfer
to other parties and amendment for any purpose not excluding
product development provided that any such use et cetera
shall be deemed to be acceptance of the following conditions:-
(1) Its Recipients shall ensure that this Notice is
reproduced upon any copies or amended versions of it;
(2) Any amended version of it shall be clearly marked to
show both the nature of and the organisation responsible
for the relevant amendment or amendments;
(3) Its onward transfer from a recipient to another
party shall be deemed to be that party's acceptance of
these conditions;
(4) DERA gives no warranty or assurance as to its
quality or suitability for any purpose and DERA accepts
no liability whatsoever in relation to any use to which
it may be put.
*/
/**** dalloc.c --- Memory allocation and deallocation.
*
** Author: Steve Folkes <smf@hermes.mod.uk>
*
**** Commentary:
*
* This file implements the dynamic memory management facility specified in
* the file "dalloc.h". See that file for more information.
*
**** Change Log:
* $Log: dalloc.c,v $
* Revision 1.1.1.1 1998/01/17 15:57:17 release
* First version to be checked into rolling release.
*
* Revision 1.2 1994/12/12 11:45:28 smf
* Performing changes for 'CR94_178.sid+tld-update' - bringing in line with
* OSSG C Coding Standards.
*
* Revision 1.1.1.1 1994/07/25 16:06:09 smf
* Initial import of os-interface shared files.
*
**/
/****************************************************************************/
#include "dalloc.h"
/*--------------------------------------------------------------------------*/
ExceptionP XX_dalloc_no_memory = EXCEPTION ("cannot allocate memory");
/*--------------------------------------------------------------------------*/
#ifdef PO_DALLOC_DEBUG_ALIGN
#define DALLOC_MAGIC 0x21436587
#define ALIGN(x) (((int) (((x) + (PO_DALLOC_DEBUG_ALIGN) - 1) / \
(PO_DALLOC_DEBUG_ALIGN))) * (PO_DALLOC_DEBUG_ALIGN))
/*--------------------------------------------------------------------------*/
typedef struct DallocDataT {
CStringP file;
unsigned line;
SizeT size;
int magic;
} DallocDataT, *DallocDataP;
/*--------------------------------------------------------------------------*/
static SizeT dalloc_data_size = ALIGN (sizeof (DallocDataT));
/*--------------------------------------------------------------------------*/
#ifdef __NeXT__
#undef TRUE
#undef FALSE
#include <mach/mach.h>
/*--------------------------------------------------------------------------*/
GenericP
X__dalloc_allocate PROTO_N ((size, length, file, line))
PROTO_T (SizeT size X
SizeT length X
CStringP file X
unsigned line)
{
GenericP tmp;
ASSERT (size != 0);
if (length == 0) {
tmp = NIL (GenericP);
} else {
SizeT real_size = (((size) * length) + dalloc_data_size);
vm_address_t address;
DallocDataP data;
ByteP base;
if (vm_allocate (task_self (), &address, (vm_size_t) real_size,
TRUE) != KERN_SUCCESS) {
THROW (XX_dalloc_no_memory);
UNREACHED;
}
data = (DallocDataP) address;
base = (ByteP) address;
tmp = (base + dalloc_data_size);
data->file = file;
data->line = line;
data->size = real_size;
data->magic = DALLOC_MAGIC;
}
return (tmp);
}
void
X__dalloc_deallocate PROTO_N ((ptr, file, line))
PROTO_T (GenericP ptr X
CStringP file X
unsigned line)
{
if (ptr) {
ByteP pointer = (ByteP) ptr;
DallocDataP data = (DallocDataP) (pointer - dalloc_data_size);
vm_address_t address = (vm_address_t) data;
vm_size_t size = data->size;
kern_return_t result;
if (data->magic == 0) {
E_dalloc_multi_deallocate (ptr, file, line, data->file,
data->line);
UNREACHED;
} else if (data->magic != DALLOC_MAGIC) {
E_dalloc_corrupt_block (ptr, file, line);
UNREACHED;
}
data->magic = 0;
result = vm_protect (task_self (), address, size, FALSE, VM_PROT_NONE);
ASSERT (result == KERN_SUCCESS);
}
}
#else
GenericP
X__dalloc_allocate PROTO_N ((size, length, file, line))
PROTO_T (SizeT size X
SizeT length X
CStringP file X
unsigned line)
{
GenericP tmp;
ASSERT (size != 0);
if (length == 0) {
tmp = NIL (GenericP);
} else {
SizeT real_size = ((size * length) + dalloc_data_size);
ByteP base;
DallocDataP data;
if ((tmp = malloc (real_size)) == NIL (GenericP)) {
THROW (XX_dalloc_no_memory);
UNREACHED;
}
(void) memset (tmp, 0, real_size);
data = tmp;
base = tmp;
tmp = (base + dalloc_data_size);
data->file = file;
data->line = line;
data->magic = DALLOC_MAGIC;
}
return (tmp);
}
void
X__dalloc_deallocate PROTO_N ((ptr, file, line))
PROTO_T (GenericP ptr X
CStringP file X
unsigned line)
{
if (ptr) {
ByteP pointer = (ByteP) ptr;
DallocDataP data = (DallocDataP) (pointer - dalloc_data_size);
if (data->magic == 0) {
E_dalloc_multi_deallocate (ptr, file, line, data->file,
data->line);
UNREACHED;
} else if (data->magic != DALLOC_MAGIC) {
E_dalloc_corrupt_block (ptr, file, line);
UNREACHED;
}
data->magic = 0;
free ((GenericP) data);
}
}
#endif /* defined (__NeXT__) */
#else
GenericP
X__dalloc_allocate PROTO_N ((size, length))
PROTO_T (SizeT size X
SizeT length)
{
GenericP tmp;
ASSERT (size != 0);
if (length == 0) {
tmp = NIL (GenericP);
} else if ((tmp = calloc (length, size)) == NIL (GenericP)) {
THROW (XX_dalloc_no_memory);
UNREACHED;
}
return (tmp);
}
#endif /* defined (PO_DALLOC_DEBUG_ALIGN) */