Re: [Tsp-devel] EIF TSP: tsp_consumer_request_sample_destroy

[Eric Noulard]

2007/2/28, ZXOPESOGE001, Ext <address@hidden>:
> Hello,

Hi Sarah,

[..]

Finally, i would like to launch a new acquisition cycle (without
disconnection to provider).
> To do this, I programm the following steps:
> 1. connection to provider
> TSP_consumer_connect_url()
> TSP_consumer_request_open(_provider, 0, NULL)
> TSP_consumer_request_information(_provider)
> information = TSP_consumer_get_information(_provider) (to have tle list of 
> available symbols)
> 2.user builds the list of parameters he wants to acquired
> --> the list of symbols : _symbols
> TSP_consumer_request_sample(_provider,&_symbols);
> 3.start sampling sequence
> TSP_consumer_request_sample_init(_provider, 0, 0)
> 4.read sample (loop)
> tsp_consumer_read_sample()
> 5.reset the list of parameters he wants to acquired
> tsp_consumer_request_sample_destroy(_provider)
> 6.user builds a new list of parameters and start sampling sequence
> TSP_consumer_request_sample(_provider,&_symbols);
> TSP_consumer_request_sample_init(_provider, 0, 0);
> tsp_consumer_read_sample();

This is the correct TSP request sequence, for what you want to do
and it should work as you expected.

> My TSP problem:
> When i tell the provider to stop sending sample on calling 
> tsp_consumer_request_sample_destroy, i have the following stracedebug():
>
> /tsp_stream_sender.c##TSP_streamer_sender_thread_sender##200: End of fifo 
> thread stream sender
> /tsp_session.c##TSP_get_session##117: Channel_id = <0> is session Idx <0>
>  /tsp_session.c##TSP_get_session##117: Channel_id = <0> is session Idx <0>
> /tsp_session.c##TSP_get_session##117: Channel_id = <0> is session Idx <0>
> /tsp_session.c##TSP_session_close_session##164: Request Closing session 
> channel_id = 0
> /tsp_session.c##TSP_get_session##117: Channel_id = <0> is session Idx <0>
>  /tsp_session.c##TSP_session_close_session##173: X_session_nb now = 0.
> In this way, it's impossible to ask a new cycle of sampling  because the 
> session is closed.
> What kind of tsp requests can I use to stop a sampling acquisition cyle without 
> close the connection and then restart a new acquisition?

You should use tsp_consumer_request_sample_destroy :))
This looks like a bug in the session state handling on the provider side :((

You should open a bug on the tracker:
https://savannah.nongnu.org/bugs/?group=tsp

Nevertheless could tell us what version of TSP you use?

Moreover could you put STRACE_DEBUG to 3 or 7 on the provider side
and send us the full trace.

This kind of trace should show explicit Session state change like:
"Session was in state <2> goes to <1>"

Numeric value are:
TSP_SESSION_STATE_UNKNOWN = 0,
        TSP_SESSION_STATE_OPENED = 1,
        TSP_SESSION_STATE_CLOSED = 2,
        TSP_SESSION_STATE_REQUEST_SAMPLE_OK = 3,
        TSP_SESSION_STATE_REQUEST_SAMPLE_INIT_OK = 4,
        TSP_SESSION_STATE_SAMPLING = 5,
        TSP_SESSION_STATE_REQUEST_SAMPLE_DESTROY_OK = 6,
        TSP_SESSION_STATE_BROKEN_LINK = 7,
        TSP_SESSION_STATE_CLOSE_ON_EOF = 8,

> Thanks
> Sarah Montigaud

--
Erk