source: rtems/c/src/libchip/shmdr/getpkt.c @ ac7d5ef0

4.104.114.84.9
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: 1003 bytes
Line 
1/*  Shm_Get_packet
2 *
3 *  This routine is the shared memory locked queue MPCI driver
4 *  routine used to obtain an empty message packet.
5 *
6 *  Input parameters:
7 *    packet             - address of pointer to packet
8 *
9 *  Output parameters:
10 *    *(cpb->get_packet) - address of allocated packet
11 *
12 *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
13 *  On-Line Applications Research Corporation (OAR).
14 *  All rights assigned to U.S. Government, 1994.
15 *
16 *  This material may be reproduced by or for the U.S. Government pursuant
17 *  to the copyright license under the clause at DFARS 252.227-7013.  This
18 *  notice must appear in all copies of this file and its derivatives.
19 *
20 *  $Id$
21 */
22
23#include <rtems.h>
24#include "shm.h"
25
26rtems_mpci_entry Shm_Get_packet(
27  rtems_packet_prefix **packet
28)
29{
30  Shm_Envelope_control *ecb;
31
32  ecb = Shm_Allocate_envelope();
33  if ( !ecb )
34    rtems_fatal_error_occurred ( SHM_NO_FREE_PKTS );
35  *packet = Shm_Envelope_control_to_packet_prefix_pointer( ecb );
36}
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