namespace factor
{

static const cell special_object_count = 70;

enum special_object {
	OBJ_NAMESTACK,            /* used by library only */
	OBJ_CATCHSTACK,           /* used by library only, per-callback */

	OBJ_CURRENT_CALLBACK = 2, /* used by library only, per-callback */
	OBJ_WALKER_HOOK,          /* non-local exit hook, used by library only */
	OBJ_CALLCC_1,             /* used to pass the value in callcc1 */

	OBJ_BREAK            = 5, /* quotation called by throw primitive */
	OBJ_ERROR,                /* a marker consed onto kernel errors */

	OBJ_CELL_SIZE        = 7, /* sizeof(cell) */
	OBJ_CPU,                  /* CPU architecture */
	OBJ_OS,                   /* operating system name */

	OBJ_ARGS            = 10, /* command line arguments */
	OBJ_STDIN,                /* stdin FILE* handle */
	OBJ_STDOUT,               /* stdout FILE* handle */

	OBJ_IMAGE           = 13, /* image path name */
	OBJ_EXECUTABLE,		  /* runtime executable path name */

	OBJ_EMBEDDED 	    = 15, /* are we embedded in another app? */
	OBJ_EVAL_CALLBACK,        /* used when Factor is embedded in a C app */
	OBJ_YIELD_CALLBACK,       /* used when Factor is embedded in a C app */
	OBJ_SLEEP_CALLBACK,       /* used when Factor is embedded in a C app */

	OBJ_COCOA_EXCEPTION = 19, /* Cocoa exception handler quotation */

	OBJ_BOOT            = 20, /* boot quotation */
	OBJ_GLOBAL,               /* global namespace */

	/* Quotation compilation in quotations.c */
	JIT_PROLOG          = 23,
	JIT_PRIMITIVE_WORD,
	JIT_PRIMITIVE,
	JIT_WORD_JUMP,
	JIT_WORD_CALL,
	JIT_WORD_SPECIAL,
	JIT_IF_WORD,
	JIT_IF,
	JIT_EPILOG,
	JIT_RETURN,
	JIT_PROFILING,
	JIT_PUSH_IMMEDIATE,
	JIT_DIP_WORD,
	JIT_DIP,
	JIT_2DIP_WORD,
	JIT_2DIP,
	JIT_3DIP_WORD,
	JIT_3DIP,
	JIT_EXECUTE_WORD,
	JIT_EXECUTE_JUMP,
	JIT_EXECUTE_CALL,
	JIT_DECLARE_WORD,

	/* Callback stub generation in callbacks.c */
	CALLBACK_STUB       = 45,

	/* Polymorphic inline cache generation in inline_cache.c */
	PIC_LOAD            = 47,
	PIC_TAG,
	PIC_TUPLE,
	PIC_CHECK_TAG,
	PIC_CHECK_TUPLE,
	PIC_HIT,
	PIC_MISS_WORD,
	PIC_MISS_TAIL_WORD,

	/* Megamorphic cache generation in dispatch.c */
	MEGA_LOOKUP         = 57,
	MEGA_LOOKUP_WORD,
	MEGA_MISS_WORD,

	OBJ_UNDEFINED       = 60, /* default quotation for undefined words */

	OBJ_STDERR          = 61, /* stderr FILE* handle */

	OBJ_STAGE2          = 62, /* have we bootstrapped? */

	OBJ_CURRENT_THREAD  = 63,

	OBJ_THREADS         = 64,
	OBJ_RUN_QUEUE       = 65,
	OBJ_SLEEP_QUEUE     = 66,
};

#define OBJ_FIRST_SAVE OBJ_BOOT
#define OBJ_LAST_SAVE OBJ_STAGE2

inline static bool save_env_p(cell i)
{
	return (i >= OBJ_FIRST_SAVE && i <= OBJ_LAST_SAVE);
}

}