source: rtems/cpukit/score/src/coresem.c @ b3836ce

4.104.114.9
Last change on this file since b3836ce was b3836ce, checked in by Joel Sherrill <joel.sherrill@…>, on Sep 5, 2008 at 9:54:20 PM

2008-09-05 Joel Sherrill <joel.sherrill@…>

  • score/src/corebarrier.c, score/src/corebarrierrelease.c, score/src/corebarrierwait.c, score/src/coremsg.c, score/src/coremsgbroadcast.c, score/src/coremsgclose.c, score/src/coremsgflush.c, score/src/coremsgflushsupp.c, score/src/coremsgflushwait.c, score/src/coremsginsert.c, score/src/coremsgseize.c, score/src/coremsgsubmit.c, score/src/corerwlock.c, score/src/coresem.c, score/src/coresemflush.c, score/src/coresemseize.c, score/src/coresemsurrender.c, score/src/corespinlock.c, score/src/threadblockingoperationcancel.c, score/src/threadqenqueue.c: Remove unnecessary include of mpci.h.
  • Property mode set to 100644
File size: 1.7 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
31/*PAGE
32 *
33 *  CORE_semaphore_Initialize
34 *
35 *  This function initialize a semaphore and sets the initial value based
36 *  on the given count.
37 *
38 *  Input parameters:
39 *    the_semaphore            - the semaphore control block to initialize
40 *    the_semaphore_attributes - the attributes specified at create time
41 *    initial_value            - semaphore's initial value
42 *
43 *  Output parameters:  NONE
44 */
45
46void _CORE_semaphore_Initialize(
47  CORE_semaphore_Control       *the_semaphore,
48  CORE_semaphore_Attributes    *the_semaphore_attributes,
49  uint32_t                      initial_value
50)
51{
52
53  the_semaphore->Attributes = *the_semaphore_attributes;
54  the_semaphore->count      = initial_value;
55
56  _Thread_queue_Initialize(
57    &the_semaphore->Wait_queue,
58    _CORE_semaphore_Is_priority( the_semaphore_attributes ) ?
59              THREAD_QUEUE_DISCIPLINE_PRIORITY : THREAD_QUEUE_DISCIPLINE_FIFO,
60    STATES_WAITING_FOR_SEMAPHORE,
61    CORE_SEMAPHORE_TIMEOUT
62  );
63}
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