osfmk/ipc/ipc_right.c

264  *			generating immediate notif. would overflow urefs.
395 			mach_port_urefs_t urefs = IE_BITS_UREFS(entry->ie_bits);
397 			assert(urefs > 0);
399 			if (MACH_PORT_UREFS_OVERFLOW(urefs, 1)) {
406 			(entry->ie_bits)++; /* increment urefs */
902 			entry->ie_bits = bits-1; /* decrement urefs */
988 			entry->ie_bits = bits-1; /* decrement urefs */
1029 			entry->ie_bits = bits-1; /* decrement urefs */
1274 		mach_port_urefs_t urefs;
1298 		urefs = IE_BITS_UREFS(bits);
1299 		if (MACH_PORT_UREFS_UNDERFLOW(urefs, delta))
1301 		if (MACH_PORT_UREFS_OVERFLOW(urefs, delta))
1304 		if ((urefs + delta) == 0) {
1319 		mach_port_urefs_t urefs;
1327 		/* maximum urefs for send is MACH_PORT_UREFS_MAX-1 */
1340 		urefs = IE_BITS_UREFS(bits);
1341 		if (MACH_PORT_UREFS_UNDERFLOW(urefs, delta)) {
1345 		if (MACH_PORT_UREFS_OVERFLOW(urefs+1, delta)) {
1350 		if ((urefs + delta) == 0) {
1457 	mach_port_urefs_t urefs;
1503 		urefs = IE_BITS_UREFS(bits);
1506 		 * the check for urefs overflow is not required.
1508 		if (MACH_PORT_UREFS_UNDERFLOW(urefs, srdelta)) {
1512 		if ((urefs + srdelta) == 0) {
2126 			entry->ie_bits = bits-1; /* decrement urefs */
2225 	entry->ie_bits = bits-1; /* decrement urefs */
2283 			entry->ie_bits = bits+1; /* increment urefs */
2295 			entry->ie_bits = bits+1; /* increment urefs */
2338 	mach_port_urefs_t urefs;
2355 	urefs = IE_BITS_UREFS(bits);
2356 	if (urefs < 2)
2380 	if (urefs == 2) {
2407 		entry->ie_bits = bits-2; /* decrement urefs */
2513 			mach_port_urefs_t urefs = IE_BITS_UREFS(bits);
2516 			assert(urefs > 0);
2517 			assert(urefs < MACH_PORT_UREFS_MAX);
2519 			if (urefs+1 == MACH_PORT_UREFS_MAX) {
2521 					/* leave urefs pegged to maximum */