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/* #############################################################################
* code for memory allocation handling
* #############################################################################
* Copyright (C) 2005-2009 Harry Brueckner
*
* This program 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 any later version.
* This program 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
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Contact: Harry Brueckner <harry_b@mm.st>
* Muenchener Strasse 12a
* 85253 Kleinberghofen
* Germany
* #############################################################################
*/
/* #############################################################################
* includes
*/
#include "cpm.h"
#include "memory.h"
/* #############################################################################
* global variables
*/
long int memorycounter = 0;
/* #############################################################################
*
* Description allocate memory of the given size
* Author Harry Brueckner
* Date 2005-04-11
* Arguments see memRealAlloc
* Return see memRealAlloc
*/
void* memDebugAlloc(const char* file, int line, size_t size)
{
fprintf(stderr, "alloc %5zu (%s, line %d)\n", size, file, line);
return memRealAlloc(size);
}
/* #############################################################################
*
* Description free the given memory block
* Author Harry Brueckner
* Date 2005-04-11
* Arguments see memRealFree
* Return see memRealFree
*/
void memDebugFree(const char* file, int line, void* ptr, size_t size)
{
fprintf(stderr, "free %5zu (%s, line %d)\n", size, file, line);
memRealFree(ptr, size);
}
/* #############################################################################
*
* Description free the given memory block
* Author Harry Brueckner
* Date 2005-04-11
* Arguments see memRealFree
* Return see memRealFree
*/
void memDebugFreeString(const char* file, int line, void* ptr)
{
if (ptr)
{
fprintf(stderr, "free %5zu (%s, line %d)\n",
strlen(ptr) + 1, file, line);
}
memRealFreeString(ptr);
}
/* #############################################################################
*
* Description reallocate memory of the given size
* Author Harry Brueckner
* Date 2005-04-11
* Arguments see memRealRealloc
* Return see memRealRealloc
*/
void* memDebugRealloc(const char* file, int line, void* ptr, int size_old,
int size_new)
{
if (size_old)
{ fprintf(stderr, "rfree %5d (%s, line %d)\n", size_old, file, line); }
fprintf(stderr, "ralloc %5d (%s, line %d)\n", size_new, file, line);
return memRealRealloc(ptr, size_old, size_new);
}
/* #############################################################################
*
* Description allocate memory of the given size
* Author Harry Brueckner
* Date 2005-03-17
* Arguments size_t size - size of the area to allocate
* Return pointer to the allocated memory
*/
void* memRealAlloc(size_t size)
{
void* ptr;
ptr = malloc(size);
if (!ptr)
{
fprintf(stderr, _("out of memory error - tried to allocate %lu byte.\n"),
size);
exit(1);
}
/* update the memory counter */
memorycounter += size;
return ptr;
}
/* #############################################################################
*
* Description check if the memory is free like it was when we started
* Author Harry Brueckner
* Date 2005-03-17
* Arguments void
* Return 0 if ok, 1 if more or less memory is used
*/
long int memCheck(void)
{
return memorycounter;
}
/* #############################################################################
*
* Description free the given memory block
* Author Harry Brueckner
* Date 2005-03-17
* Arguments char* ptr - pointer to the given area
* size_t size - size of the area to free
* Return void
*/
void memRealFree(void* ptr, size_t size)
{
if (!ptr)
{ return; }
/* update the memory counter */
memorycounter -= size;
memSet(ptr, 0, size);
free(ptr);
}
/* #############################################################################
*
* Description free the given string * Author Harry Brueckner
* Date 2005-03-17
* Arguments void* ptr - pointer to the given area
* Return void
*/
void memRealFreeString(char* ptr)
{
if (!ptr)
return;
memRealFree(ptr, strlen(ptr) + 1);
}
/* #############################################################################
*
* Description reallocate memory of the given size
* Author Harry Brueckner
* Date 2005-03-18
* Arguments void* ptr
* size_t size_old - old size of the area
* size_t size_new - new size of the area
* Return pointer to the allocated memory
*/
void* memRealRealloc(void* ptr, size_t size_old, size_t size_new)
{
ptr = realloc(ptr, size_new);
if (!ptr)
{
fprintf(stderr,
_("out of memory error - tried to reallocate %lu byte.\n"),
size_new);
exit(1);
}
/* update the memory counter */
memorycounter -= size_old;
memorycounter += size_new;
return ptr;
}
/* #############################################################################
*
* Description memset which should not get optimized by any compiler; using
* this function, a 'dead store removal' problem should not
* occur;
* this code was taken from 'Secure Programming for Linux and
* Unix HOWTO' p. 129 ff.
* Author Harry Brueckner
* Date 2005-05-17
* Arguments void* ptr - pointer to the array
* int value - value to set
* size_t size - size of the array
* Return pointer to the allocated memory
*/
void* memSet(void* ptr, int value, size_t size)
{
volatile char* p = ptr;
while (size--)
{ *p++ = value; }
return ptr;
}
/* #############################################################################
*/
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