File

util.dbuffer: Add efficient shortcuts for discard() in certain cases If the buffer is already empty, nothing to do. If we're throwing away the whole buffer, we can just empty it and avoid read_chunk() (which in turn may collapse()). These shortcuts are much more efficient.

local record util_timer
	record task end
	type timer_callback = function (number) : number
	add_task : function ( number, timer_callback, any ) : task
	stop : function ( task )
	reschedule : function ( task, number ) : task
end
return util_timer