function os.pullEventRaw( sFilter )
    return coroutine.yield( sFilter )
end

function os.pullEvent( sFilter )
    local eventData = { os.pullEventRaw( sFilter ) }
    if eventData[1] == "terminate" then
        error( "Terminated", 0 )
    end
    return unpack( eventData )
end

-- Install globals
function sleep( nTime )
    local timer = os.startTimer( nTime or 0 )
    repeat
        local sEvent, param = os.pullEvent( "timer" )
    until param == timer
end