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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [shmdr/] [poll.c] - Blame information for rev 593

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Line No. Rev Author Line
1 30 unneback
/*  void Shm_Poll()
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 *
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 *  This routine polls to see if a packet has arrived.  If one
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 *  has it informs the executive.  It is typically called from
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 *  the clock tick interrupt service routine.
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 *
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 *  Input parameters:  NONE
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 *
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 *  Output parameters: NONE
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 *
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 *  COPYRIGHT (c) 1989-1999.
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 *  On-Line Applications Research Corporation (OAR).
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 *
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 *  The license and distribution terms for this file may be
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 *  found in the file LICENSE in this distribution or at
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 *  http://www.OARcorp.com/rtems/license.html.
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 *
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 *  $Id: poll.c,v 1.2 2001-09-27 12:01:12 chris Exp $
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 */
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#include <rtems.h>
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#include <rtems/score/sysstate.h>
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#include <rtems/libio.h>
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#include "shm_driver.h"
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void Shm_Poll()
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{
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  rtems_unsigned32 tmpfront;
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  rtems_libio_ioctl_args_t args;
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  /* invoke clock isr */
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  args.iop = 0;
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  args.command = rtems_build_name('I', 'S', 'R', ' ');
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  (void) rtems_io_control(rtems_clock_major, rtems_clock_minor, &args);
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  /*
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   * Check for msgs only if we are "up"
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   * This avoids a race condition where we may get a clock
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   * interrupt before MPCI has completed its init
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   */
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  if (_System_state_Is_up(_System_state_Get()))
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  {
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      tmpfront = Shm_Local_receive_queue->front;
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      if ( Shm_Convert(tmpfront) != Shm_Locked_queue_End_of_list )
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      {
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          rtems_multiprocessing_announce();
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          Shm_Interrupt_count++;
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      }
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  }
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}

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