source: rtems/cpukit/score/src/coresem.c @ d4d7899

4.11
Last change on this file since d4d7899 was 9b4422a2, checked in by Joel Sherrill <joel.sherrill@…>, on May 3, 2012 at 3:09:24 PM

Remove All CVS Id Strings Possible Using a Script

Script does what is expected and tries to do it as
smartly as possible.

+ remove occurrences of two blank comment lines

next to each other after Id string line removed.

+ remove entire comment blocks which only exited to

contain CVS Ids

+ If the processing left a blank line at the top of

a file, it was removed.

  • 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
18#if HAVE_CONFIG_H
19#include "config.h"
20#endif
21
22#include <rtems/system.h>
23#include <rtems/score/isr.h>
24#include <rtems/score/coresem.h>
25#include <rtems/score/states.h>
26#include <rtems/score/thread.h>
27#include <rtems/score/threadq.h>
28
29/*
30 *  CORE_semaphore_Initialize
31 *
32 *  This function initialize a semaphore and sets the initial value based
33 *  on the given count.
34 *
35 *  Input parameters:
36 *    the_semaphore            - the semaphore control block to initialize
37 *    the_semaphore_attributes - the attributes specified at create time
38 *    initial_value            - semaphore's initial value
39 *
40 *  Output parameters:  NONE
41 */
42
43void _CORE_semaphore_Initialize(
44  CORE_semaphore_Control       *the_semaphore,
45  CORE_semaphore_Attributes    *the_semaphore_attributes,
46  uint32_t                      initial_value
47)
48{
49
50  the_semaphore->Attributes = *the_semaphore_attributes;
51  the_semaphore->count      = initial_value;
52
53  _Thread_queue_Initialize(
54    &the_semaphore->Wait_queue,
55    _CORE_semaphore_Is_priority( the_semaphore_attributes ) ?
56              THREAD_QUEUE_DISCIPLINE_PRIORITY : THREAD_QUEUE_DISCIPLINE_FIFO,
57    STATES_WAITING_FOR_SEMAPHORE,
58    CORE_SEMAPHORE_TIMEOUT
59  );
60}
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