db plug in for ca client returns incomplete channel name from ca_name(chid)

[Jeff Hill]

From John Sinclair:

Is the following a bug or a feature?

The following code behaves differently depending where it is run.

As a stand-alone application, it runs correctly.

When it runs as a thread on a soft IOC, it does not. A comment below
listed as "HERE'S THE PROBLEM" indicates the incorrect behavior.

====================================
This block simply creates a thread
====================================

static char g_arg1[255+1], g_arg2[255+1], g_arg3[255+1];

long epicsShareAPI func(
  char *arg1,
  char *arg2,
  char *arg3
) {

epicsThreadId id;

  strncpy( g_arg1, arg1, 255 );
  g_arg1[255] = 0;

  strncpy( g_arg2, arg2, 255 );
  g_arg2[255] = 0;

  strncpy( g_arg3, arg3, 255 );
  g_arg3[255] = 0;

  id = epicsThreadCreate( "A Thread",
   epicsThreadPriorityLow,
   epicsThreadGetStackSize( epicsThreadStackMedium ),
   aThread, NULL );

  return 0;

}

====================================
Here's the thread
====================================

static void aThread (
  void *arg
) {

int stat;
chid id;

enum ca_preemptive_callback_select {
  ca_disable_preemptive_callback,
  ca_enable_preemptive_callback
};

    stat = ca_context_create ( ca_enable_preemptive_callback );

    stat = ca_search( "pv.LOLO", &id );
    if ( stat != ECA_NORMAL ) {
      printf( "ca_search failed\\n" );
      goto err_return;
    }
    stat = ca_pend_io( 5.0 );
    if ( stat != ECA_NORMAL ) {
      printf( "ca_pend_io failed\\n" );
      goto err_return;
    }

    ====================================
    HERE'S THE PROBLEM
    ====================================

    printf( "Name is [%s]\\n", ca_name(id) );

    ====================================
    ca_name returns "pv" instead of "pv.LOLO"
    ====================================

    ====================================
    However, id is correct. It does map to pv.LOLO.
    (This conclusion is based on other code)
    ====================================

    return;

err_return:

    printf( "Error\\n" );

}

========================================================================

Original Mantis Bug: mantis-148
    http://www.aps.anl.gov/epics/mantis/view_bug_page.php?f_id=148

[Jeff Hill (johill-lanl)]

fixed in R3.14.7

[Andrew Johnson (anj)]

R3.14.7 Released