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<== Date ==> <== Thread ==>

Subject: pend_io
From: Steve Hunt <hunt@alceli.ch>
To: core-talk@aps.anl.gov
Date: Tue, 26 Jun 2012 15:49:00 +0200
I have a problem running a trivial (too trivial it seems) ca client
program.

I fact I just generated the ca example using makeBaseApp.

I changed caget to caput :)

The value was not written to my ioc

I am running 3.14.12.2, on linux_x86_64 but the behavior seems the same
in older versions (at least 3.14.9(

I am sending this to core-talk rather than tech-talk as this seems to be
a real ca problem


#################################################################################3
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include <cadef.h>

int main (int argc, char *argv[])
{
        double  data=86;
        chid        mychid;

        SEVCHK(ca_create_channel(argv[1], NULL, NULL, 10,
&mychid),"failure");
        SEVCHK(ca_pend_io(10.0),"failure");

        SEVCHK(ca_array_put(DBR_DOUBLE, 1, mychid, &data),"failure");
        SEVCHK(ca_pend_io(10.0),"failure");
//      SEVCHK(ca_array_get(DBR_DOUBLE, 1, mychid, &data),"failure");
//      SEVCHK(ca_pend_io(10.0),"failure");
//      SEVCHK(ca_flush_io(),"failure");
//      SEVCHK(ca_poll(),"failure");

//      sleep(10);
//      ca_context_destroy();

//      return result;
}


When I un-comment ca_poll, ca_context_destroy, ca_get (plus its
pend_io), or sleep!!!  it works!!!

so  a ca_poll, a ca_context_destroy, or a ca_pend_io AFTER a ca_get,
seems to flush the send buffer - but just ca_pend_io, nor ca_flush_io
seem not to do so.

At least the client example generated from makebaseApp should have a
ca_put added, and made to work without the ca_get, but perhaps this
could be considered a bug.







Replies:
RE: pend_io Hill, Jeff

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