4.104.114.84.95
Rev | Line | |
---|
[ac7d5ef0] | 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 | * |
---|
[60b791ad] | 11 | * COPYRIGHT (c) 1989-1998. |
---|
[ac7d5ef0] | 12 | * On-Line Applications Research Corporation (OAR). |
---|
[03f2154e] | 13 | * Copyright assigned to U.S. Government, 1994. |
---|
[ac7d5ef0] | 14 | * |
---|
[98e4ebf5] | 15 | * The license and distribution terms for this file may be |
---|
| 16 | * found in the file LICENSE in this distribution or at |
---|
[03f2154e] | 17 | * http://www.OARcorp.com/rtems/license.html. |
---|
[ac7d5ef0] | 18 | * |
---|
[b06e68ef] | 19 | * $Id$ |
---|
[ac7d5ef0] | 20 | */ |
---|
| 21 | |
---|
| 22 | #include <rtems.h> |
---|
[5e9b32b] | 23 | #include <rtems/score/sysstate.h> |
---|
[b06e68ef] | 24 | #include <rtems/libio.h> |
---|
| 25 | |
---|
[ac7d5ef0] | 26 | #include "shm.h" |
---|
| 27 | |
---|
| 28 | void Shm_Poll() |
---|
| 29 | { |
---|
| 30 | rtems_unsigned32 tmpfront; |
---|
[b06e68ef] | 31 | rtems_libio_ioctl_args_t args; |
---|
[ac7d5ef0] | 32 | |
---|
[b06e68ef] | 33 | /* invoke clock isr */ |
---|
| 34 | args.iop = 0; |
---|
| 35 | args.command = rtems_build_name('I', 'S', 'R', ' '); |
---|
| 36 | (void) rtems_io_control(rtems_clock_major, rtems_clock_minor, &args); |
---|
[88d594a] | 37 | |
---|
| 38 | /* |
---|
| 39 | * Check for msgs only if we are "up" |
---|
| 40 | * This avoids a race condition where we may get a clock |
---|
| 41 | * interrupt before MPCI has completed its init |
---|
| 42 | */ |
---|
| 43 | |
---|
| 44 | if (_System_state_Is_up(_System_state_Get())) |
---|
| 45 | { |
---|
| 46 | tmpfront = Shm_Local_receive_queue->front; |
---|
[b06e68ef] | 47 | if ( Shm_Convert(tmpfront) != Shm_Locked_queue_End_of_list ) |
---|
| 48 | { |
---|
| 49 | rtems_multiprocessing_announce(); |
---|
| 50 | Shm_Interrupt_count++; |
---|
[12f86efd] | 51 | } |
---|
[88d594a] | 52 | } |
---|
[ac7d5ef0] | 53 | } |
---|
Note: See
TracBrowser
for help on using the repository browser.