source: rtems/c/src/lib/libbsp/shmdr/send.c @ ac7d5ef0

4.104.114.84.95
Last change on this file since ac7d5ef0 was ac7d5ef0, checked in by Joel Sherrill <joel.sherrill@…>, on May 11, 1995 at 5:39:37 PM

Initial revision

  • Property mode set to 100644
File size: 1.9 KB
Line 
1/*  Shm_Send_packet
2 *
3 *  This routine is the shared memory driver locked queue write
4 *  MPCI driver routine.  This routine sends the specified packet
5 *  to the destination specified by "node".  A "node" value of
6 *  zero designates that this packet is to be broadcasted.
7 *
8 *  Input parameters:
9 *    node          - destination of this packet (0 = broadcast)
10 *    packet        - address of packet
11 *
12 *  Output parameters: NONE
13 *
14 *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
15 *  On-Line Applications Research Corporation (OAR).
16 *  All rights assigned to U.S. Government, 1994.
17 *
18 *  This material may be reproduced by or for the U.S. Government pursuant
19 *  to the copyright license under the clause at DFARS 252.227-7013.  This
20 *  notice must appear in all copies of this file and its derivatives.
21 *
22 *  $Id$
23 */
24
25#include <rtems.h>
26#include "shm.h"
27
28struct pkt_cpy {
29  rtems_unsigned32 packet[MAX_PACKET_SIZE/4];
30};
31
32rtems_mpci_entry Shm_Send_packet(
33  rtems_unsigned32 node,
34  rtems_packet_prefix *packet
35)
36{
37  Shm_Envelope_control *ecb, *tmp_ecb;
38  rtems_unsigned32 nnum;
39
40  ecb = Shm_Packet_prefix_to_envelope_control_pointer( packet );
41  if ( node ) {
42    Shm_Build_preamble( ecb, node );
43    Shm_Build_postamble( ecb );
44    Shm_Append_to_receive_queue( node, ecb );
45    (*Shm_Configuration->cause_intr)( node );
46  }
47  else {
48    for( nnum = SHM_FIRST_NODE ; nnum <= Shm_Maximum_nodes ; nnum++ )
49      if ( Shm_Local_node != nnum ) {
50        tmp_ecb = Shm_Allocate_envelope();
51        if ( !tmp_ecb )
52          rtems_fatal_error_occurred( SHM_NO_FREE_PKTS );
53        Shm_Build_preamble( tmp_ecb, nnum );
54        *((struct pkt_cpy *)tmp_ecb->packet) = *((struct pkt_cpy *)packet);
55        Shm_Build_postamble( tmp_ecb );
56        Shm_Append_to_receive_queue( nnum, tmp_ecb );
57        (*Shm_Configuration->cause_intr)( nnum );
58      }
59    Shm_Free_envelope( ecb );
60  }
61}
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