lib/isc/rwlock.c

51 print_lock(const char *operation, isc_rwlock_t *rwl, isc_rwlocktype_t type) {
58 		(type == isc_rwlocktype_read ?
63 		(rwl->type == isc_rwlocktype_read ?
101 	rwl->type = isc_rwlocktype_read;
241 isc_rwlock_lock(isc_rwlock_t *rwl, isc_rwlocktype_t type) {
248 				  ISC_MSG_PRELOCK, "prelock"), rwl, type);
251 	if (type == isc_rwlocktype_read) {
344 				  ISC_MSG_POSTLOCK, "postlock"), rwl, type);
351 isc_rwlock_trylock(isc_rwlock_t *rwl, isc_rwlocktype_t type) {
358 				  ISC_MSG_PRELOCK, "prelock"), rwl, type);
361 	if (type == isc_rwlocktype_read) {
406 				  ISC_MSG_POSTLOCK, "postlock"), rwl, type);
464 isc_rwlock_unlock(isc_rwlock_t *rwl, isc_rwlocktype_t type) {
471 				  ISC_MSG_PREUNLOCK, "preunlock"), rwl, type);
474 	if (type == isc_rwlocktype_read) {
528 		   rwl, type);
537 doit(isc_rwlock_t *rwl, isc_rwlocktype_t type, isc_boolean_t nonblock) {
548 				  ISC_MSG_PRELOCK, "prelock"), rwl, type);
551 	if (type == isc_rwlocktype_read) {
557 			      (rwl->type == isc_rwlocktype_read &&
561 				rwl->type = isc_rwlocktype_read;
580 				rwl->type = isc_rwlocktype_write;
598 				  ISC_MSG_POSTLOCK, "postlock"), rwl, type);
607 isc_rwlock_lock(isc_rwlock_t *rwl, isc_rwlocktype_t type) {
608 	return (doit(rwl, type, ISC_FALSE));
612 isc_rwlock_trylock(isc_rwlock_t *rwl, isc_rwlocktype_t type) {
613 	return (doit(rwl, type, ISC_TRUE));
622 	REQUIRE(rwl->type == isc_rwlocktype_read);
629 		rwl->type = isc_rwlocktype_write;
642 	REQUIRE(rwl->type == isc_rwlocktype_write);
645 	rwl->type = isc_rwlocktype_read;
661 isc_rwlock_unlock(isc_rwlock_t *rwl, isc_rwlocktype_t type) {
665 	REQUIRE(rwl->type == type);
667 	UNUSED(type);
671 				  ISC_MSG_PREUNLOCK, "preunlock"), rwl, type);
678 			rwl->type = rwl->original;
681 		if (rwl->type == isc_rwlocktype_read) {
684 				rwl->type = isc_rwlocktype_write;
697 					rwl->type = isc_rwlocktype_read;
713 		   rwl, type);
733 	rwl->type = isc_rwlocktype_read;
741 isc_rwlock_lock(isc_rwlock_t *rwl, isc_rwlocktype_t type) {
744 	if (type == isc_rwlocktype_read) {
745 		if (rwl->type != isc_rwlocktype_read && rwl->active != 0)
747 		rwl->type = isc_rwlocktype_read;
752 		rwl->type = isc_rwlocktype_write;
759 isc_rwlock_trylock(isc_rwlock_t *rwl, isc_rwlocktype_t type) {
760 	return (isc_rwlock_lock(rwl, type));
768 	REQUIRE(rwl->type == isc_rwlocktype_read);
773 		rwl->type = isc_rwlocktype_write;
783 	REQUIRE(rwl->type == isc_rwlocktype_write);
786 	rwl->type = isc_rwlocktype_read;
790 isc_rwlock_unlock(isc_rwlock_t *rwl, isc_rwlocktype_t type) {
792 	REQUIRE(rwl->type == type);
794 	UNUSED(type);