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author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1995-05-11 17:39:37 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1995-05-11 17:39:37 +0000 |
commit | ac7d5ef06a6d6e8d84abbd1f0b82162725f98326 (patch) | |
tree | 9304cf759a73f2a1c6fd3191948f00e870af3787 /c/src/lib/libbsp/shmdr/poll.c | |
download | rtems-ac7d5ef06a6d6e8d84abbd1f0b82162725f98326.tar.bz2 |
Initial revision
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++; +} |