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#ifndef BDL_GC_H
#define BDL_GC_H
#include "objects.h"
#include "environment.h"
// Stack of root nodes.
typedef struct RootNodes {
Object **buf;
size_t size;
size_t cap;
} RootNodes;
// Stack of active environments.
typedef struct ActiveEnvs {
Environment **buf;
size_t size;
size_t cap;
} ActiveEnvs;
typedef struct Environments {
Environment *buf;
size_t size;
size_t cap;
} Environments;
typedef struct FreeList {
size_t *buf;
size_t size;
size_t cap;
size_t position;
} FreeList;
typedef struct GC {
RootNodes roots;
Environments envs;
Object *objects;
size_t obj_cap;
FreeList free_objects;
FreeList free_envs;
ActiveEnvs active_envs;
} GC;
void init_gc(void);
// Allocation functions for objects and environments.
Object * alloc_object(ObjectType type);
Environment * alloc_env(void);
// Root and environment protector functions.
void push_root(Object *obj);
Object * pop_root(void);
void push_active_env(Environment *env);
Environment * pop_active_env(void);
// Mark and sweep algorithm functions.
void mark_environment(Environment *env);
void mark_obj(Object *obj);
void mark_and_sweep(void);
// Debugging function to print out the contentes of some GC fields.
void dump_gc(void);
#define GC_OBJS_CAP 1024 * 1024
#define GC_ROOTS_CAP 1024
#define GC_ACTIVE_ENVS_CAP 2
#define GC_ENVS_CAP 1024 * 4
#endif // BDL_GC_H
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