[Mean]

Why not.

pawn Код:

SetTimerEx( "Jail", time_you_entered * 1000, 0, "i", playerid );

Later just

pawn Код:

forward Jail( playerid );
public Jail( playerid )
{
    // Code to realase from jail
    return 1;
}

So, why to make a timer that's updating all the time?