add factorial example'

[msc-thesis1617.git] / arch.communication.tex

diff --git a/arch.communication.tex b/arch.communication.tex
index 9082fd5..2472ab7 100644 (file)
--- a/arch.communication.tex
+++ b/arch.communication.tex
@@ -53,26 +53,38 @@ brevity.
 
 \subsection{Add a device}
 A device can be added by filling in the \CI{MTaskDevice} record as much as
-possible and running the \CI{connectDevice} function. This function grabs the
-channels, starts the synchronization \gls{Task} (\CI{synFun}), makes sure the
-errors are handled when needed and runs a processing function in parallel to
-react on the incoming messages. Moreover, it sends a specification request to
-the device in question to determine the details of the device and updates the
-record to contain the top-level \gls{Task}-id. All device functionality
-heavily depends on the specific \CI{deviceShare} function that generates an
-\gls{SDS} for a specific device. This allows giving an old device record to the
-function and still update the latest instance. Listing~\ref{lst:connectDevice}
-shows the connection function.
+possible and running the \CI{connectDevice} function. This function grabs and
+clears the channels, starts the synchronization \gls{Task} (\CI{synFun}), makes
+sure the errors are handled when needed and runs a processing function in
+parallel to react on the incoming messages. Moreover, it sends a specification
+request to the device in question to determine the details of the device and
+updates the record to contain the top-level \gls{Task}-id. All device
+functionality heavily depends on the specific \CI{deviceShare} function that
+generates an \gls{SDS} for a specific device. This allows giving an old device
+record to the function and still update the latest instance.
+Listing~\ref{lst:connectDevice} shows the connection function.
 
 \begin{lstlisting}[label={lst:connectDevice},%
        caption={Connect a device}]
-connectDevice :: (MTaskDevice (Shared Channels) -> Task ()) MTaskDevice -> Task Channels
-connectDevice procFun device = set ([], [], False) ch
-               >>| appendTopLevelTask 'DM'.newMap True
-               (       procFun device ch -||- catchAll (getSynFun device.deviceData ch) errHdl)
-               >>= \tid->upd (\d->{d&deviceTask=Just tid,deviceError=Nothing}) (deviceShare device)
-               >>| set (r,[MTSpec],ss) ch
-               >>| treturn device
+process :: MTaskDevice (Shared Channels) -> Task ()
+process device ch = forever $ wait "process" (not o isEmpty o fst3) ch
+       >>= \(r,s,ss)->upd (appFst3 (const [])) ch >>| proc r
+where
+       proc :: [MTaskMSGRecv] -> Task ()
+       proc [] = treturn ()
+       proc [m:ms] = (case m of
+               MTPub i val = updateShareFromPublish device i val @! ()
+               ...
+               MTDevSpec s = deviceAddSpec device s @! ()
+               ) >>| proc ms
+
+connectDevice :: MTaskDevice -> Task Channels
+connectDevice device = set ([], [], False) ch
+       >>| appendTopLevelTask 'DM'.newMap True
+       (       process device ch -||- catchAll (getSynFun device.deviceData ch) errHdl)
+       >>= \tid->upd (\d->{d&deviceTask=Just tid,deviceError=Nothing}) (deviceShare device)
+       >>| set (r,[MTSpec],ss) ch
+       >>| treturn device
 where
        errHdl e = upd (\d->{d & deviceTask=Nothing, deviceError=Just e}) (deviceShare device) @! ()
        ch = channels device
@@ -132,7 +144,7 @@ makeTask name ident = get currentDateTime @ \dt->{MTaskTask | name=name, ident=i
 makeShare :: String Int BCValue -> MTaskShare
 makeShare withTask identifier value = {MTaskShare | withTask=[withTask], identifier=identifier, value=value}
 
-sendTaskToDevice :: String (Main (ByteCode a Stmt)) (MTaskDevice, MTaskInterval) -> Task MTaskTask
+sendTaskToDevice :: String (Main (ByteCode a Stmt)) (MTaskDevice, MTaskInterval) -> Task (MTaskTask, [MTaskShare])
 sendTaskToDevice wta mTask (device, timeout)
 # (msgs, newState=:{sdss}) = toMessages timeout mTask device.deviceState
 # shares = [makeShare wta "" sdsi sdsval\\{sdsi,sdsval}<-sdss, (MTSds sdsi` _)<-msgs | sdsi == sdsi`]
@@ -141,7 +153,7 @@ sendTaskToDevice wta mTask (device, timeout)
        >>| makeTask wta -1
        >>= \t->upd (addTaskUpState newState t) (deviceShare device)
        >>| wait "Waiting for task to be acked" (taskAcked t) (deviceShare device)
-       >>| treturn t
+       >>| treturn (t, shares)
 where
        addTaskUpState :: BCState MTaskTask MTaskDevice -> MTaskDevice
        addTaskUpState st task device = {MTaskDevice | device & deviceState=st, deviceTasks=[task:device.deviceTasks]}