BOUNCE rtl@rtlinux.org: Approval required: Non-member submissionfrom [root <agn@city.dk>] (fwd)

[Der Herr Hofrat <der.herr@hofr.at>]

>From owner-rtl Wed May  9 08:57:25 2001
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Date: Wed, 09 May 2001 16:48:22 +0200
From: root <agn@city.dk>
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To: rtlinux <rtl@rtlinux.org>
Subject: bug repport
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hi all
I think I have found a bug.
I think the problem is that "some" kommunikation between linux kernel
and RT-linux goes wrong.

I have made a test program. It does NOT work, and crashes -> turn off.
The program is simple. It just start a thread running every 1/10000 sec.
The thread wake up sleeping prosses up in the queue "my_queue".

The program start out fine, but when i try to open another program (in
linux user space) it crashes.
ps. I am using RT-linux 3.0 based on kernel 2.4.1
/*
 * this file is have only one funktion -> to test the queue structurer
 * auther : Anders Gnistrup email : agn@city.dk
 *----------------------------------------------------------------------*/

#include <rtl.h>
#include <rtl_sched.h>
#include <rtl_conf.h>
#include <rtl_core.h>
#include <rtl_sync.h>


wait_queue_head_t my_queue;
pthread_t queue_ID;
void *queue(void *);

void *queue(void *t) {
  while(1) {
    pthread_wait_np();
    wake_up(&my_queue);
  }
  return 0;
}

int init_module(void) {
  pthread_attr_t attr;
  struct sched_param sched_param;
  hrtime_t period = 1000000000/11520;

  init_waitqueue_head(&my_queue);

  pthread_attr_init(&attr);
  sched_param.sched_priority = 4;
  pthread_attr_setschedparam(&attr,&sched_param);
  pthread_create(&queue_ID,&attr, queue, (void *) 0);
  pthread_make_periodic_np(queue_ID, gethrtime(), period);
  return 0;
}


void cleanup_module(void) {
  pthread_suspend_np(queue_ID);
  pthread_cancel(queue_ID);
  pthread_join(queue_ID, NULL);
}