source: rtems/c/src/libchip/shmdr/getlq.c @ ee4f57d

4.104.114.84.95
Last change on this file since ee4f57d was ee4f57d, checked in by Ralf Corsepius <ralf.corsepius@…>, on Mar 23, 2004 at 9:59:52 AM

2004-03-23 Ralf Corsepius <ralf_corsepius@…>

  • libchip/ide/ata.c, libchip/ide/ata_internal.h, libchip/ide/ide_controller.c, libchip/ide/ide_ctrl_cfg.h, libchip/ide/ide_ctrl_io.h, libchip/network/cs8900.c, libchip/network/dec21140.c, libchip/network/elnk.c, libchip/network/if_fxp.c, libchip/network/open_eth.c, libchip/network/open_eth.h, libchip/network/sonic.c, libchip/network/sonic.h, libchip/rtc/icm7170.c, libchip/rtc/icm7170.h, libchip/rtc/icm7170_reg.c, libchip/rtc/icm7170_reg2.c, libchip/rtc/icm7170_reg4.c, libchip/rtc/icm7170_reg8.c, libchip/rtc/m48t08.c, libchip/rtc/m48t08.h, libchip/rtc/m48t08_reg.c, libchip/rtc/m48t08_reg2.c, libchip/rtc/m48t08_reg4.c, libchip/rtc/m48t08_reg8.c, libchip/rtc/rtc.h, libchip/serial/mc68681.c, libchip/serial/mc68681.h, libchip/serial/mc68681_reg.c, libchip/serial/mc68681_reg2.c, libchip/serial/mc68681_reg4.c, libchip/serial/mc68681_reg8.c, libchip/serial/ns16550.c, libchip/serial/ns16550_p.h, libchip/serial/serial.h, libchip/serial/z85c30.c, libchip/serial/z85c30.h, libchip/serial/z85c30_p.h, libchip/serial/z85c30_reg.c, libchip/shmdr/addlq.c, libchip/shmdr/cnvpkt.c, libchip/shmdr/dump.c, libchip/shmdr/fatal.c, libchip/shmdr/getlq.c, libchip/shmdr/init.c, libchip/shmdr/initlq.c, libchip/shmdr/intr.c, libchip/shmdr/poll.c, libchip/shmdr/send.c, libchip/shmdr/shm_driver.h: Convert to using c99 fixed-size types.
  • Property mode set to 100644
File size: 1.2 KB
Line 
1/*  Shm_Envelope_control *Shm_Locked_queue_Get( lq_cb )
2 *
3 *  This routine returns an envelope control block from a shared
4 *  memory queue.
5 *
6 *  Input parameters:
7 *    lq_cb - pointer to a locked queue control block
8 *
9 *  Output parameters:
10 *    returns - pointer to an envelope control block
11 *            - NULL if no envelopes on specified queue
12 *
13 *  COPYRIGHT (c) 1989-1999.
14 *  On-Line Applications Research Corporation (OAR).
15 *
16 *  The license and distribution terms for this file may be
17 *  found in the file LICENSE in this distribution or at
18 *  http://www.rtems.com/license/LICENSE.
19 *
20 *  $Id$
21 */
22
23#include <rtems.h>
24#include <shm_driver.h>
25
26Shm_Envelope_control *Shm_Locked_queue_Get(
27  Shm_Locked_queue_Control *lq_cb
28)
29{
30  Shm_Envelope_control *tmp_ecb;
31  uint32_t   tmpfront;
32
33  tmp_ecb = NULL;
34  Shm_Lock( lq_cb );
35
36    tmpfront = Shm_Convert(lq_cb->front);
37    if ( tmpfront != Shm_Locked_queue_End_of_list ) {
38      tmp_ecb = &Shm_Envelopes[ tmpfront ];
39      lq_cb->front = tmp_ecb->next;
40      if ( tmp_ecb->next == Shm_Locked_queue_End_of_list )
41        lq_cb->rear = Shm_Locked_queue_End_of_list;
42      tmp_ecb->next = Shm_Locked_queue_Not_on_list;
43    }
44
45  Shm_Unlock( lq_cb );
46  return( tmp_ecb );
47}
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