diff options
Diffstat (limited to 'bsps/shared/shmdr/shmdr-receive.c')
-rw-r--r-- | bsps/shared/shmdr/shmdr-receive.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/bsps/shared/shmdr/shmdr-receive.c b/bsps/shared/shmdr/shmdr-receive.c new file mode 100644 index 0000000000..5cf7692f01 --- /dev/null +++ b/bsps/shared/shmdr/shmdr-receive.c @@ -0,0 +1,41 @@ +/* Shm_Receive_packet + * + * This routine is the shared memory locked queue MPCI driver routine + * used to obtain a packet containing a message from this node's + * receive queue. + * + * Input parameters: + * packet - address of a pointer to a packet + * + * Output parameters: + * *(rpb->packet) - pointer to packet + * NULL if no packet currently available + * + * COPYRIGHT (c) 1989-1999. + * On-Line Applications Research Corporation (OAR). + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + */ + +#include <rtems.h> +#include "shm_driver.h" + +rtems_mpci_entry Shm_Receive_packet( + rtems_packet_prefix **packet +) +{ + Shm_Envelope_control *ecb; + + ecb = Shm_Locked_queue_Get( Shm_Local_receive_queue ); + if ( ecb ) { + *(packet) = Shm_Envelope_control_to_packet_prefix_pointer( ecb ); + if ( ecb->Preamble.endian != Shm_Configuration->format ) + Shm_Convert_packet( *packet ); + Shm_Receive_message_count++; + } else { + *(packet) = NULL; + Shm_Null_message_count++; + } +} |