Running the endline after a made hoop

[mutantducky]

If after a made basket a player picks up the ball, and is set to throw in but tosses the ball to the ref. Does the ref stop the count, throw the ball back? I saw that once and the coach wanted a violation but none was called and I didn't think any should have been.
A delay of game warning for a player that tosses to a ref and the ball bounces off so the player has to chase it. keep counting five seconds or pause? Or blow the whistle to stop the clock and no delay?