source: rtems/cpukit/score/src/coresem.c @ a8eed23

4.104.114.84.9
Last change on this file since a8eed23 was a8eed23, checked in by Ralf Corsepius <ralf.corsepius@…>, on Jan 27, 2005 at 5:57:05 AM

Include config.h.

  • Property mode set to 100644
File size: 1.8 KB
Line 
1/*
2 *  CORE Semaphore Handler
3 *
4 *  DESCRIPTION:
5 *
6 *  This package is the implementation of the CORE Semaphore Handler.
7 *  This core object utilizes standard Dijkstra counting semaphores to provide
8 *  synchronization and mutual exclusion capabilities.
9 *
10 *  COPYRIGHT (c) 1989-1999.
11 *  On-Line Applications Research Corporation (OAR).
12 *
13 *  The license and distribution terms for this file may be
14 *  found in the file LICENSE in this distribution or at
15 *  http://www.rtems.com/license/LICENSE.
16 *
17 *  $Id$
18 */
19
20#if HAVE_CONFIG_H
21#include "config.h"
22#endif
23
24#include <rtems/system.h>
25#include <rtems/score/isr.h>
26#include <rtems/score/coresem.h>
27#include <rtems/score/states.h>
28#include <rtems/score/thread.h>
29#include <rtems/score/threadq.h>
30#if defined(RTEMS_MULTIPROCESSING)
31#include <rtems/score/mpci.h>
32#endif
33
34/*PAGE
35 *
36 *  CORE_semaphore_Initialize
37 *
38 *  This function initialize a semaphore and sets the initial value based
39 *  on the given count.
40 *
41 *  Input parameters:
42 *    the_semaphore            - the semaphore control block to initialize
43 *    the_semaphore_attributes - the attributes specified at create time
44 *    initial_value            - semaphore's initial value
45 *
46 *  Output parameters:  NONE
47 */
48
49void _CORE_semaphore_Initialize(
50  CORE_semaphore_Control       *the_semaphore,
51  CORE_semaphore_Attributes    *the_semaphore_attributes,
52  uint32_t                      initial_value
53)
54{
55
56  the_semaphore->Attributes = *the_semaphore_attributes;
57  the_semaphore->count      = initial_value;
58
59  _Thread_queue_Initialize(
60    &the_semaphore->Wait_queue,
61    _CORE_semaphore_Is_priority( the_semaphore_attributes ) ?
62              THREAD_QUEUE_DISCIPLINE_PRIORITY : THREAD_QUEUE_DISCIPLINE_FIFO,
63    STATES_WAITING_FOR_SEMAPHORE,
64    CORE_SEMAPHORE_TIMEOUT
65  );
66}
Note: See TracBrowser for help on using the repository browser.