OPPOSITE DIRECTION TKOF SAME RWY SMA X HAD NMAC WITH SMA Y IN TFC PATTERN. SEE AND AVOID CONCEPT.

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SMA X APCHING THE ARPT FOR LNDG TALKING TO TWR. I REQUESTED RWY 28; WINDS WERE LIGHT; TFC WAS HVY ON RWY 17; THE ACTIVE RWY. I WAS CLRED TO LAND XING PARKER ROAD. THE TWR HAD 1 ACFT I WAS AWARE OF HOLDING SHORT OF RWY 10. WHEN 1/2 - 1/4 MI FROM APCH END I SAW AN ACFT Y ROLLING ON RWY 10. HE HAD LNDG LIGHT ON AND SO DID I. I STOPPED DSCNT AND SLOWED TO SEE WHAT Y ON RWY WAS DOING. HE CONTINUED TO ROLL. THE WX WAS WARM SO HE DID NOT ROTATE UNTIL LAST 1/3 OF RWY. I CALLED TWR WHEN I COULD; MAINTAINED MY ALT; AND STARTED R TURN TO THE N. ASKED CTLR WHAT HE WANTED ME TO DO AS HE HAD Y DEPARTING. HIS RESPONSE WAS 'YOU'RE CLRED TO LAND.' HE THEN HASTILY INSTRUCTED THE DEPARTING Y TO TURN OUT TO THE N. I TURNED BACK TO THE RWY. Y PASSED UNDER ME. I WAS DIRECTLY OFF THE APCH END WHICH NECESSITATED FULL FLAPS; '0' PWR; AND A SLIP TO LNDG. I FEEL THE SIT WAS VERY DANGEROUS. IF I HAD CONTINUED TO FLY A NORMAL APCH I WOULD HAVE MET THE Y AT THE SAME ALT HEAD ON. THE CTLR DID NOT SEEM TO RECOGNIZE THE SIT.