roots.h
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roots.h
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	#ifndef ROOTS_H
	#define ROOTS_H

	#include "types.h"

	jshdl_t js_root(struct js *js, jsval_t val);
	jsval_t js_deref(struct js *js, jshdl_t h);

	void js_unroot(struct js *js, jshdl_t h);
	void js_root_update(struct js *js, jshdl_t h, jsval_t val);

	typedef struct {
	struct js *js;
	jshdl_t h;
	} rooted_handle_t;

	static inline void _rooted_cleanup(rooted_handle_t *r) {
	if (r->h) js_unroot(r->js, r->h);
	}

	#define ROOTED(name, val) \
	jsval_t name = (val); \
	rooted_handle_t name##_r __attribute__((cleanup(_rooted_cleanup))) = {js, js_root(js, name)}

	#define ROOT_UPDATE(name, val) do { \
	name = (val); \
	js_root_update(js, name##_r.h, name); \
	} while(0)

	#define ROOT_SYNC(name) (name = js_deref(js, name##_r.h))

	#endif