source: rtems/cpukit/score/src/coresem.c @ 3127180

4.104.114.84.9
Last change on this file since 3127180 was 3127180, checked in by Ralf Corsepius <ralf.corsepius@…>, on Mar 29, 2004 at 12:51:43 PM

2004-04-29 Ralf Corsepius <ralf_corsepius@…>

  • score/src/Unlimited.txt, score/src/chain.c, score/src/coremsg.c, score/src/coremsgbroadcast.c, score/src/coremsgclose.c, score/src/coremsgflush.c, score/src/coremsgflushsupp.c, score/src/coremsgseize.c, score/src/coremsgsubmit.c, score/src/coremutex.c, score/src/coremutexflush.c, score/src/coresem.c, score/src/coresemflush.c, score/src/coretod.c, score/src/coretodtickle.c, score/src/coretodtoseconds.c, score/src/coretodvalidate.c, score/src/heap.c, score/src/heapallocate.c, score/src/heapextend.c, score/src/heapfree.c, score/src/heapsizeofuserarea.c, score/src/interr.c, score/src/iterateoverthreads.c, score/src/mpci.c, score/src/object.c, score/src/objectallocate.c, score/src/objectallocatebyindex.c, score/src/objectclearname.c, score/src/objectcomparenameraw.c, score/src/objectcomparenamestring.c, score/src/objectcopynameraw.c, score/src/objectcopynamestring.c, score/src/objectextendinformation.c, score/src/objectfree.c, score/src/objectget.c, score/src/objectgetbyindex.c, score/src/objectgetisr.c, score/src/objectgetnoprotection.c, score/src/objectidtoname.c, score/src/objectinitializeinformation.c, score/src/objectmp.c, score/src/objectnametoid.c, score/src/objectshrinkinformation.c, score/src/thread.c, score/src/threadcreateidle.c, score/src/threadget.c, score/src/threadidlebody.c, score/src/threadinitialize.c, score/src/threadmp.c, score/src/threadq.c, score/src/threadqdequeuepriority.c, score/src/threadqenqueuepriority.c, score/src/threadqfirstpriority.c, score/src/threadqflush.c, score/src/threadreset.c, score/src/threadrestart.c, score/src/threadsettransient.c, score/src/threadstackallocate.c, score/src/threadstart.c, score/src/userext.c, score/src/watchdoginsert.c, score/src/wkspace.c: Convert to using c99 fixed size types.
  • 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#include <rtems/system.h>
21#include <rtems/score/isr.h>
22#include <rtems/score/coresem.h>
23#include <rtems/score/states.h>
24#include <rtems/score/thread.h>
25#include <rtems/score/threadq.h>
26#if defined(RTEMS_MULTIPROCESSING)
27#include <rtems/score/mpci.h>
28#endif
29
30/*PAGE
31 *
32 *  CORE_semaphore_Initialize
33 *
34 *  This function initialize a semaphore and sets the initial value based
35 *  on the given count.
36 *
37 *  Input parameters:
38 *    the_semaphore            - the semaphore control block to initialize
39 *    the_semaphore_attributes - the attributes specified at create time
40 *    initial_value            - semaphore's initial value
41 *
42 *  Output parameters:  NONE
43 */
44
45void _CORE_semaphore_Initialize(
46  CORE_semaphore_Control       *the_semaphore,
47  CORE_semaphore_Attributes    *the_semaphore_attributes,
48  uint32_t                      initial_value
49)
50{
51
52  the_semaphore->Attributes = *the_semaphore_attributes;
53  the_semaphore->count      = initial_value;
54
55  _Thread_queue_Initialize(
56    &the_semaphore->Wait_queue,
57    _CORE_semaphore_Is_priority( the_semaphore_attributes ) ?
58              THREAD_QUEUE_DISCIPLINE_PRIORITY : THREAD_QUEUE_DISCIPLINE_FIFO,
59    STATES_WAITING_FOR_SEMAPHORE,
60    CORE_SEMAPHORE_TIMEOUT
61  );
62}
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