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/* void Shm_Poll()
*
* This routine polls to see if a packet has arrived. If one
* has it informs the executive. It is typically called from
* the clock tick interrupt service routine.
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include <rtems.h>
#include <rtems/score/sysstate.h>
#include <rtems/libio.h>
#include "shm_driver.h"
void Shm_Poll()
{
rtems_unsigned32 tmpfront;
rtems_libio_ioctl_args_t args;
/* invoke clock isr */
args.iop = 0;
args.command = rtems_build_name('I', 'S', 'R', ' ');
(void) rtems_io_control(rtems_clock_major, rtems_clock_minor, &args);
/*
* Check for msgs only if we are "up"
* This avoids a race condition where we may get a clock
* interrupt before MPCI has completed its init
*/
if (_System_state_Is_up(_System_state_Get()))
{
tmpfront = Shm_Local_receive_queue->front;
if ( Shm_Convert(tmpfront) != Shm_Locked_queue_End_of_list )
{
rtems_multiprocessing_announce();
Shm_Interrupt_count++;
}
}
}
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