/***************************************************************************

  gb_alloc.h

  (c) 2000-2009 Benoît Minisini <gambas@users.sourceforge.net>

  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, or (at your option)
  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., 675 Mass Ave, Cambridge, MA 02139, USA.

***************************************************************************/

#ifndef __GB_ALLOC_H
#define __GB_ALLOC_H

#define DEBUG_MEMORY 0
#define OPTIMIZE_MEMORY 1
//#define DO_NOT_PRINT_MEMORY

#ifndef __GB_ALLOC_C
EXTERN int MEMORY_count;
#endif

#if DEBUG_MEMORY

#undef OPTIMIZE_MEMORY
#define OPTIMIZE_MEMORY 0

typedef
  struct ALLOC {
    int _void;
    struct ALLOC *next;
    struct ALLOC *prev;
    int id;
    size_t size;
    }
  PACKED
  ALLOC;

EXTERN int MEMORY_size;
EXTERN FILE *MEMORY_log;

#define ALLOC(_ptr, _size, _src)        MEMORY_alloc((void *)_ptr, _size, _src)
#define ALLOC_ZERO(_ptr, _size, _src)   MEMORY_alloc_zero((void *)_ptr, _size, _src)
#define REALLOC(_ptr, _size, _src)      MEMORY_realloc((void *)_ptr, _size, _src)
#define FREE(_ptr, _src)                MEMORY_free((void *)_ptr, _src)
#define IFREE(_ptr, _src)               FREE(&(_ptr), _src)

#define GET_ALLOC_ID(_ptr) (((ALLOC *)((char *)(_ptr) - sizeof(ALLOC)))->id)

void MEMORY_alloc(void *p_ptr, size_t size, const char *src);
void MEMORY_alloc_zero(void *p_ptr, size_t size, const char *src);
void MEMORY_realloc(void *p_ptr, size_t size, const char *src);
void MEMORY_free(void *p_ptr, const char *src);
void MEMORY_check(void);

void MEMORY_verify(void);
void MEMORY_check_ptr(void *ptr);

#elif OPTIMIZE_MEMORY

#define ALLOC(_ptr, _size, _src)        ((*(_ptr) = malloc(_size)) ? MEMORY_count++ : THROW_MEMORY())
#define ALLOC_ZERO(_ptr, _size, _src)   ((*(_ptr) = calloc(_size, 1)) ? MEMORY_count++ : THROW_MEMORY())
#define REALLOC(_ptr, _size, _src)      ((*(_ptr) = realloc(*(_ptr), _size)) ? 0 : THROW_MEMORY())
#define FREE(_ptr, _src)                (*(_ptr) ? free(*(_ptr)), *(_ptr) = NULL, MEMORY_count-- : 0)
#define IFREE(_ptr, _src)               (_ptr ? free(_ptr), MEMORY_count-- : 0)

int THROW_MEMORY();

#else

#define ALLOC(_ptr, _size, _src)        MEMORY_alloc((void *)_ptr, _size)
#define ALLOC_ZERO(_ptr, _size, _src)   MEMORY_alloc_zero((void *)_ptr, _size)
#define REALLOC(_ptr, _size, _src)      MEMORY_realloc((void *)_ptr, _size)
#define FREE(_ptr, _src)                MEMORY_free((void *)_ptr)
#define IFREE(_ptr, _src)               FREE(&(_ptr), _src)

void MEMORY_alloc(void *p_ptr, size_t size);
void MEMORY_alloc_zero(void *p_ptr, size_t size);
void MEMORY_realloc(void *p_ptr, size_t size);
void MEMORY_free(void *p_ptr);
void MEMORY_check(void);

#endif

void MEMORY_init(void);
void MEMORY_exit(void);

#endif