source: rtems/cpukit/score/src/coresem.c @ 82cb78d8

4.104.114.84.9
Last change on this file since 82cb78d8 was 82cb78d8, checked in by Joel Sherrill <joel.sherrill@…>, on Nov 2, 1999 at 9:45:15 PM

Split core message queue and watchdog handler objects into separate files.

  • Property mode set to 100644
File size: 2.0 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) 1989-1998.
11 *  On-Line Applications Research Corporation (OAR).
12 *  Copyright assigned to U.S. Government, 1994.
13 *
14 *  The license and distribution terms for this file may be
15 *  found in the file LICENSE in this distribution or at
16 *  http://www.OARcorp.com/rtems/license.html.
17 *
18 *  $Id$
19 */
20
21#include <rtems/system.h>
22#include <rtems/score/isr.h>
23#include <rtems/score/coresem.h>
24#include <rtems/score/states.h>
25#include <rtems/score/thread.h>
26#include <rtems/score/threadq.h>
27#if defined(RTEMS_MULTIPROCESSING)
28#include <rtems/score/mpci.h>
29#endif
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_class                - the API class of the object
41 *    the_semaphore_attributes - the attributes specified at create time
42 *    initial_value            - semaphore's initial value
43 *    proxy_extract_callout    - MP specific extract callout
44 *
45 *  Output parameters:  NONE
46 */
47
48void _CORE_semaphore_Initialize(
49  CORE_semaphore_Control       *the_semaphore,
50  Objects_Classes               the_class,
51  CORE_semaphore_Attributes    *the_semaphore_attributes,
52  unsigned32                    initial_value,
53  Thread_queue_Extract_callout  proxy_extract_callout
54)
55{
56
57  the_semaphore->Attributes = *the_semaphore_attributes;
58  the_semaphore->count      = initial_value;
59
60  _Thread_queue_Initialize(
61    &the_semaphore->Wait_queue,
62    the_class,
63    _CORE_semaphore_Is_priority( the_semaphore_attributes ) ?
64              THREAD_QUEUE_DISCIPLINE_PRIORITY : THREAD_QUEUE_DISCIPLINE_FIFO,
65    STATES_WAITING_FOR_SEMAPHORE,
66    proxy_extract_callout,
67    CORE_SEMAPHORE_TIMEOUT
68  );
69}
Note: See TracBrowser for help on using the repository browser.