4.104.114.84.95
Last change
on this file since a314d3b4 was
48bfd992,
checked in by Joel Sherrill <joel.sherrill@…>, on 11/30/99 at 19:58:02
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Renamed shm.h to shm_driver.h to avoid conflicts with POSIX shm.h.
Renamed file shmsupp/intr.c in some BSPs to shmsupp/cause_intr.c to
avoid conflict with rtems/src/intr.c (Classic API Interrupt Manager).
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-
Property mode set to
100644
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File size:
1.3 KB
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1 | /* void Shm_Poll() |
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2 | * |
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3 | * This routine polls to see if a packet has arrived. If one |
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4 | * has it informs the executive. It is typically called from |
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5 | * the clock tick interrupt service routine. |
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6 | * |
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7 | * Input parameters: NONE |
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8 | * |
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9 | * Output parameters: NONE |
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10 | * |
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11 | * COPYRIGHT (c) 1989-1999. |
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12 | * On-Line Applications Research Corporation (OAR). |
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13 | * |
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14 | * The license and distribution terms for this file may be |
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15 | * found in the file LICENSE in this distribution or at |
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16 | * http://www.OARcorp.com/rtems/license.html. |
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17 | * |
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18 | * $Id$ |
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19 | */ |
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20 | |
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21 | #include <rtems.h> |
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22 | #include <rtems/score/sysstate.h> |
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23 | #include <rtems/libio.h> |
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24 | |
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25 | #include "shm_driver.h" |
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26 | |
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27 | void Shm_Poll() |
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28 | { |
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29 | rtems_unsigned32 tmpfront; |
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30 | rtems_libio_ioctl_args_t args; |
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31 | |
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32 | /* invoke clock isr */ |
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33 | args.iop = 0; |
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34 | args.command = rtems_build_name('I', 'S', 'R', ' '); |
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35 | (void) rtems_io_control(rtems_clock_major, rtems_clock_minor, &args); |
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36 | |
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37 | /* |
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38 | * Check for msgs only if we are "up" |
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39 | * This avoids a race condition where we may get a clock |
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40 | * interrupt before MPCI has completed its init |
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41 | */ |
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42 | |
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43 | if (_System_state_Is_up(_System_state_Get())) |
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44 | { |
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45 | tmpfront = Shm_Local_receive_queue->front; |
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46 | if ( Shm_Convert(tmpfront) != Shm_Locked_queue_End_of_list ) |
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47 | { |
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48 | rtems_multiprocessing_announce(); |
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49 | Shm_Interrupt_count++; |
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50 | } |
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51 | } |
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52 | } |
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