[Xenomai-help] Cleanup after using the vxWorks skin?

[Xenomai-help] Cleanup after using the vxWorks skin?

[Niklaus Giger]

Hi

I run a program using the vxworks skin from user space. As did hang, I 
typed  "Ctrl-C" to end the program.

Looking at /proc/xenomai/registry/vxworks/semaphores/ I remarked however, that 
there were still vxworks semaphores open, which had not been deleted.

Is it up to the programmer to clean up at exit? Or is this a bug in the 
current Xenomai implementation?

My test program looks like this:
#include <sys/mman.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include "vxworks/vxworks.h"
extern "C" int root_thread_init();
extern "C" void root_thread_exit(void);

int main (int argc, char *argv[])
{
  int tid;
  mlockall(MCL_CURRENT|MCL_FUTURE);
  atexit(&root_thread_exit);
  tid = taskSpawn("root", 10, 0, 32*1024, (FUNCPTR) root_thread_init, 
1,2,3,4,5,6,7,8,9,10);
  if (tid > 0)  pause();
  return 1;
}
  extern "C" void root_thread_exit(void)
  {
    printf("%s: task %d\n", __FUNCTION__, taskIdSelf());
  }
  extern "C" int root_thread_init()
  { const char* arg="";
    const char* argv[2];
    argv[0]  = "undefined";
    argv[1]  = arg;
    int argc = sizeof(argv) / sizeof(char*);
    int semId1 = semCCreate(SEM_Q_PRIORITY, 3);
    int semId3 = semMCreate(SEM_Q_PRIORITY | SEM_INVERSION_SAFE );
    printf("proc %s: task %d %s \n", __FUNCTION__, taskIdSelf(), 
taskName(taskIdSelf()));
    taskDelay(sysClkRateGet());
    printf("proc %s: task %d shutting down\n", __FUNCTION__, taskIdSelf());
//     return 0;
   exit(0);
}

Best regards

-- 
Niklaus Giger

Re: [Xenomai-help] Cleanup after using the vxWorks skin?

[Philippe Gerum]

On Sat, 2006-10-21 at 16:28 +0200, Niklaus Giger wrote:
> Hi
> 
> I run a program using the vxworks skin from user space. As did hang, I 
> typed  "Ctrl-C" to end the program.
> 
> Looking at /proc/xenomai/registry/vxworks/semaphores/ I remarked however, that 
> there were still vxworks semaphores open, which had not been deleted.
> 
> Is it up to the programmer to clean up at exit? Or is this a bug in the 
> current Xenomai implementation?
> 

It's not a bug, but rather a limitation. We don't currently support
auto-cleanup of objects in the VxWorks skin.

-- 
Philippe.

Re: [Xenomai-help] Cleanup after using the vxWorks skin?

[Niklaus Giger]

Am Samstag, 21. Oktober 2006 16:52 schrieb Philippe Gerum:
> On Sat, 2006-10-21 at 16:28 +0200, Niklaus Giger wrote:
> > Hi
> >
> > I run a program using the vxworks skin from user space. As did hang, I
> > typed  "Ctrl-C" to end the program.
> >
> > Looking at /proc/xenomai/registry/vxworks/semaphores/ I remarked however,
> > that there were still vxworks semaphores open, which had not been
> > deleted.
> >
> > Is it up to the programmer to clean up at exit? Or is this a bug in the
> > current Xenomai implementation?
>
> It's not a bug, but rather a limitation. We don't currently support
> auto-cleanup of objects in the VxWorks skin.
Though what about applying a small patch like this?

Index: doc/txt/vxworks-skin.txt
===================================================================
--- doc/txt/vxworks-skin.txt    (Revision 1738)
+++ doc/txt/vxworks-skin.txt    (Arbeitskopie)
@@ -104,6 +104,9 @@
   taskDelete() which might need to wait for the deleted task to exit a
   safe section (taskSafe/taskUnsafe) before proceeding.

+- There is currently no support for auto-cleanup of objects in the VxWorks
+  skin.
+
 Module parameters
 =================


Best regards
-- 
Niklaus Giger