PL/SQL :: SELECT - How To Wait Until Result Appears

SELECT * from TABLE_1 where a=b;

Is it possible to make the SELECT (PL/SQL is OK ) wait/block in case there are no rows found until another session inserts rows that match the condition?

Something like this

cursor c is select * from TABLE_1 where a=b order by column_a for update skip locked;
row c%rowtype;
begin
open c;

[Code].....

Or the INSERTing session should send some kind of notification (semaphore?) to the reading session?