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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [shmdr/] [receive.c] - Rev 593
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/* 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.OARcorp.com/rtems/license.html. * * $Id: receive.c,v 1.2 2001-09-27 12:01:12 chris Exp $ */ #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++; } }
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