source: rtems/c/src/lib/libbsp/shmdr/poll.c @ ac7d5ef0

4.104.114.84.95
Last change on this file since ac7d5ef0 was ac7d5ef0, checked in by Joel Sherrill <joel.sherrill@…>, on May 11, 1995 at 5:39:37 PM

Initial revision

  • Property mode set to 100644
File size: 1.1 KB
Line 
1/*  void Shm_Poll()
2 *
3 *  This routine polls to see if a packet has arrived.  If one
4 *  has it informs the executive.  It is typically called from
5 *  the clock tick interrupt service routine.
6 *
7 *  Input parameters:  NONE
8 *
9 *  Output parameters: NONE
10 *
11 *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
12 *  On-Line Applications Research Corporation (OAR).
13 *  All rights assigned to U.S. Government, 1994.
14 *
15 *  This material may be reproduced by or for the U.S. Government pursuant
16 *  to the copyright license under the clause at DFARS 252.227-7013.  This
17 *  notice must appear in all copies of this file and its derivatives.
18 *
19 *  $Id$
20 */
21
22#include <rtems.h>
23#include "shm.h"
24#include "clockdrv.h"
25
26void Shm_Poll()
27{
28  rtems_unsigned32 tmpfront;
29
30  Clock_isr( 0 );             /* invoke standard clock ISR */
31
32  /* enable_tracing(); */
33  /* ticks += 1; */
34  Shm_Lock( Shm_Local_receive_queue );
35    tmpfront = Shm_Local_receive_queue->front;
36  Shm_Unlock( Shm_Local_receive_queue );
37  if ( Shm_Convert(tmpfront) == Shm_Locked_queue_End_of_list ) return;
38  rtems_multiprocessing_announce();
39  Shm_Interrupt_count++;
40}
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