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/*
** mruby/gc.h - garbage collector for mruby
**
** See Copyright Notice in mruby.h
*/
#ifndef MRUBY_GC_H
#define MRUBY_GC_H
#include "common.h"
/**
* Uncommon memory management stuffs.
*/
MRB_BEGIN_DECL
struct mrb_state;
#define MRB_EACH_OBJ_OK 0
#define MRB_EACH_OBJ_BREAK 1
typedef int (mrb_each_object_callback)(struct mrb_state *mrb, struct RBasic *obj, void *data);
void mrb_objspace_each_objects(struct mrb_state *mrb, mrb_each_object_callback *callback, void *data);
MRB_API void mrb_free_context(struct mrb_state *mrb, struct mrb_context *c);
#ifndef MRB_GC_ARENA_SIZE
#define MRB_GC_ARENA_SIZE 100
#endif
typedef enum {
MRB_GC_STATE_ROOT = 0,
MRB_GC_STATE_MARK,
MRB_GC_STATE_SWEEP
} mrb_gc_state;
typedef struct mrb_heap_page {
struct RBasic *freelist;
struct mrb_heap_page *prev;
struct mrb_heap_page *next;
struct mrb_heap_page *free_next;
struct mrb_heap_page *free_prev;
mrb_bool old:1;
void *objects[];
} mrb_heap_page;
typedef struct mrb_gc {
mrb_heap_page *heaps; /* heaps for GC */
mrb_heap_page *sweeps;
mrb_heap_page *free_heaps;
size_t live; /* count of live objects */
#ifdef MRB_GC_FIXED_ARENA
struct RBasic *arena[MRB_GC_ARENA_SIZE]; /* GC protection array */
#else
struct RBasic **arena; /* GC protection array */
int arena_capa;
#endif
int arena_idx;
mrb_gc_state state; /* state of gc */
int current_white_part; /* make white object by white_part */
struct RBasic *gray_list; /* list of gray objects to be traversed incrementally */
struct RBasic *atomic_gray_list; /* list of objects to be traversed atomically */
size_t live_after_mark;
size_t threshold;
int interval_ratio;
int step_ratio;
mrb_bool iterating :1;
mrb_bool disabled :1;
mrb_bool full :1;
mrb_bool generational :1;
mrb_bool out_of_memory :1;
size_t majorgc_old_threshold;
} mrb_gc;
MRB_API mrb_bool
mrb_object_dead_p(struct mrb_state *mrb, struct RBasic *object);
MRB_END_DECL
#endif /* MRUBY_GC_H */
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