nursery

collections.h
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			#ifndef COLLECTIONS_H
			#define COLLECTIONS_H

			#include <uthash.h>
			#include "types.h"
			#include "gc.h"

			typedef struct map_entry {
			char *key;
			jsval_t value;
			UT_hash_handle hh;
			} map_entry_t;

			typedef struct set_entry {
			jsval_t value;
			char *key;
			UT_hash_handle hh;
			} set_entry_t;

			typedef struct weakmap_entry {
			jsval_t key_obj;
			jsval_t value;
			UT_hash_handle hh;
			} weakmap_entry_t;

			typedef struct weakset_entry {
			jsval_t value_obj;
			UT_hash_handle hh;
			} weakset_entry_t;

			typedef enum {
			ITER_TYPE_MAP_VALUES,
			ITER_TYPE_MAP_KEYS,
			ITER_TYPE_MAP_ENTRIES,
			ITER_TYPE_SET_VALUES,
			ITER_TYPE_SET_ENTRIES
			} iter_type_t;

			typedef struct map_iterator_state {
			map_entry_t **head;
			map_entry_t *current;
			iter_type_t type;
			} map_iterator_state_t;

			typedef struct set_iterator_state {
			set_entry_t **head;
			set_entry_t *current;
			iter_type_t type;
			} set_iterator_state_t;

			typedef struct map_registry_entry {
			map_entry_t **head;
			jsoff_t obj_offset;
			} map_registry_entry_t;

			typedef struct set_registry_entry {
			set_entry_t **head;
			jsoff_t obj_offset;
			} set_registry_entry_t;

			void init_collections_module(void);
			void cleanup_collections_module(void);
			size_t collections_get_external_memory(void);

			void collections_gc_reserve_roots(GC_OP_VAL_ARGS);
			void collections_gc_update_roots(jsoff_t (fwd_off)(void ctx, jsoff_t old), GC_OP_VAL_ARGS);

			map_entry_t *get_map_from_obj(ant_t js, jsval_t obj);
			set_entry_t *get_set_from_obj(ant_t js, jsval_t obj);

			#endif