kernel/locks/lock.cpp

502 	int32 oldCount = atomic_add(&lock->count, 1);
503 	if (oldCount < RW_LOCK_WRITER_COUNT_BASE) {
561 	int32 oldCount = atomic_add(&lock->count, 1);
562 	if (oldCount < RW_LOCK_WRITER_COUNT_BASE) {
674 	int32 oldCount = atomic_add(&lock->count, -1);
675 	if (oldCount < RW_LOCK_WRITER_COUNT_BASE)
715 	int32 oldCount = atomic_add(&lock->count, RW_LOCK_WRITER_COUNT_BASE);
717 	if (oldCount == 0) {
726 	if (oldCount < RW_LOCK_WRITER_COUNT_BASE)
727 		lock->active_readers = oldCount - lock->pending_readers;
766 	int32 oldCount = atomic_add(&lock->count, -RW_LOCK_WRITER_COUNT_BASE);
767 	oldCount -= RW_LOCK_WRITER_COUNT_BASE;
769 	if (oldCount != 0) {
771 		if (oldCount >= RW_LOCK_WRITER_COUNT_BASE) {
783 			lock->pending_readers = oldCount - readerCount