forked from Imagelibrary/rtems
58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
/**
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* @file
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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 uses a Classic API Timer
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*/
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/*
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* COPYRIGHT (c) 1989-2008, 2016.
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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.rtems.org/license/LICENSE.
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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 <assert.h>
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#include "shm_driver.h"
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static rtems_timer_service_routine Shm_Poll_TSR(
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rtems_id id,
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void *ignored_address
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)
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{
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uint32_t tmpfront;
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/*
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* This should NEVER happen but just in case.
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*/
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if (!_System_state_Is_up(_System_state_Get()))
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return;
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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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rtems_multiprocessing_announce();
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Shm_Interrupt_count++;
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}
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(void) rtems_timer_reset( id );
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}
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void Shm_install_timer(void)
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{
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rtems_id id;
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rtems_status_code status;
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status = rtems_timer_create( rtems_build_name( 'S', 'H', 'P', 'L' ), &id );
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assert( !status );
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status = rtems_timer_fire_after( id, 1, Shm_Poll_TSR, NULL );
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assert( !status );
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}
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