gc.h
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gc.h
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	#ifndef ANT_GC_H
	#define ANT_GC_H

	#include "internal.h"
	#include <stdbool.h>
	#include <stdint.h>

	#define GC_MIN_TICK 1024
	#define GC_NURSERY_THRESHOLD 32768
	#define GC_FORCE_INTERVAL_MS 50
	#define GC_MAJOR_EVERY_N_MINOR 8

	#define GC_OBJ_TYPE_MASK (JS_TPFLG(T_OBJ) \
	\| JS_TPFLG(T_ARR) \
	\| JS_TPFLG(T_PROMISE) \
	\| JS_TPFLG(T_GENERATOR))

	typedef struct gc_func_mark_profile {
	bool enabled;
	uint64_t collections;
	uint64_t func_visits;
	uint64_t child_edges;
	uint64_t const_slots;
	uint64_t time_ns;
	} gc_func_mark_profile_t;

	void gc_run(ant_t *js);
	void gc_run_minor(ant_t *js);
	void gc_maybe(ant_t *js);
	void gc_remember_add(ant_t js, ant_object_t obj);

	size_t gc_live_major_threshold(ant_t *js);
	size_t gc_pool_major_threshold(ant_t *js);

	void gc_func_mark_profile_enable(bool enabled);
	void gc_func_mark_profile_reset(void);

	extern bool gc_disabled;
	gc_func_mark_profile_t gc_func_mark_profile_get(void);

	static inline void gc_write_barrier(ant_t js, ant_object_t writer_obj, ant_value_t new_val) {
	if (writer_obj->generation != 1 \|\| new_val <= NANBOX_PREFIX) return;
	uint8_t type = (new_val >> NANBOX_TYPE_SHIFT) & NANBOX_TYPE_MASK;
	if (type == T_FUNC) gc_remember_add(js, writer_obj);
	else if ((1u << type) & GC_OBJ_TYPE_MASK) {
	ant_object_t ref = (ant_object_t )(uintptr_t)(new_val & NANBOX_DATA_MASK);
	if (ref && ref->generation == 0) gc_remember_add(js, writer_obj);
	}
	}

	#endif