clib/gc.h

   1 /* This file is part of NIT ( http://www.nitlanguage.org ).
   2  *
   3  * Copyright 2009 Julien Chevalier <chevjulien@gmail.com>
   4  *
   5  * This file is free software, which comes along with NIT.  This software is
   6  * distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
   7  * without  even  the implied warranty of  MERCHANTABILITY or  FITNESS FOR A
   8  * PARTICULAR PURPOSE.  You can modify it is you want,  provided this header
   9  * is kept unaltered, and a notification of the changes is added.
  10  * You  are  allowed  to  redistribute it and sell it, alone or is a part of
  11  * another product.
  12  */
  13
  14 #ifndef GC
  15 #define GC
  16
  17 #include <stdlib.h>
  18 #include <stdio.h>
  19 #include <errno.h>
  20 #include "nit_common.h"
  21 #include "gc_static_objects_list.h"
  22
  23 /* Markbit manipulations */
  24 #define GET_MARKBIT(x) (((val_t)((x)[0].vft)) & 1)
  25 #define SET_MARKBIT(x) ((x)->vft = (void*)(((bigint)((x)->vft)) | 1))
  26 #define REMOVE_MARKBIT(x) ((x) ^ 1)
  27
  28 #define HEAP_ACTIVE_SIZE_MIN 3000
  29
  30 typedef struct heap {
  31         char *heapPointer;
  32         unsigned long size;
  33 } heap;
  34
  35 typedef struct TBOX_struct {
  36         const classtable_elt_t *vft;
  37         char *val;
  38         bigint object_id;
  39 } *BOX_struct;
  40
  41 heap *heapActive;
  42 heap *heapInactive;
  43 char *allocationPointer;
  44 char *evacuationPointer;
  45 char *scavengingPointer;
  46
  47 unsigned long heapActiveUsedSize;
  48
  49 GC_List staticObjects;
  50
  51 void Nit_gc_init(void);
  52
  53 val_t GC_evacuation(obj_t object);
  54
  55 void GC_scavenging(void);
  56
  57 void* Nit_gc_malloc(size_t size);
  58
  59 void GC_add_static_object(val_t *pointer);
  60
  61 #endif