diff options
Diffstat (limited to 'c/src/lib/libbsp/shmdr/poll.c')
-rw-r--r-- | c/src/lib/libbsp/shmdr/poll.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/shmdr/poll.c b/c/src/lib/libbsp/shmdr/poll.c new file mode 100644 index 0000000000..43f6711ff9 --- /dev/null +++ b/c/src/lib/libbsp/shmdr/poll.c @@ -0,0 +1,40 @@ +/* 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, 1990, 1991, 1992, 1993, 1994. + * On-Line Applications Research Corporation (OAR). + * All rights assigned to U.S. Government, 1994. + * + * This material may be reproduced by or for the U.S. Government pursuant + * to the copyright license under the clause at DFARS 252.227-7013. This + * notice must appear in all copies of this file and its derivatives. + * + * $Id$ + */ + +#include <rtems.h> +#include "shm.h" +#include "clockdrv.h" + +void Shm_Poll() +{ + rtems_unsigned32 tmpfront; + + Clock_isr( 0 ); /* invoke standard clock ISR */ + + /* enable_tracing(); */ + /* ticks += 1; */ + Shm_Lock( Shm_Local_receive_queue ); + tmpfront = Shm_Local_receive_queue->front; + Shm_Unlock( Shm_Local_receive_queue ); + if ( Shm_Convert(tmpfront) == Shm_Locked_queue_End_of_list ) return; + rtems_multiprocessing_announce(); + Shm_Interrupt_count++; +} |