source: rtems/cpukit/score/src/corebarrierwait.c @ b2b77956

4.104.11
Last change on this file since b2b77956 was b2b77956, checked in by Joel Sherrill <joel.sherrill@…>, on Jul 20, 2009 at 2:51:21 PM

2009-07-20 Joel Sherrill <joel.sherrill@…>

  • score/src/corebarrierwait.c: Reverse order of tests to increase test coverage.
  • Property mode set to 100644
File size: 2.1 KB
Line 
1/*
2 *  SuperCore Barrier Handler
3 *
4 *  DESCRIPTION:
5 *
6 *  This package is part of the implementation of the SuperCore Barrier Handler.
7 *
8 *  COPYRIGHT (c) 1989-2006.
9 *  On-Line Applications Research Corporation (OAR).
10 *
11 *  The license and distribution terms for this file may be
12 *  found in the file LICENSE in this distribution or at
13 *  http://www.rtems.com/license/LICENSE.
14 *
15 *  $Id$
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/corebarrier.h>
25#include <rtems/score/states.h>
26#include <rtems/score/thread.h>
27#include <rtems/score/threadq.h>
28
29/*PAGE
30 *
31 *  _CORE_barrier_Wait
32 *
33 *  Input parameters:
34 *    the_barrier - pointer to barrier control block
35 *    id          - id of object to wait on
36 *    wait        - true if wait is allowed, false otherwise
37 *    timeout     - number of ticks to wait (0 means forever)
38 *    api_barrier_mp_support - api dependent MP support actions
39 *
40 *  Output parameters:  NONE
41 *
42 *  INTERRUPT LATENCY:
43 *    available
44 *    wait
45 */
46
47void _CORE_barrier_Wait(
48  CORE_barrier_Control                *the_barrier,
49  Objects_Id                           id,
50  bool                                 wait,
51  Watchdog_Interval                    timeout,
52  CORE_barrier_API_mp_support_callout  api_barrier_mp_support
53)
54{
55  Thread_Control *executing;
56  ISR_Level       level;
57
58  executing = _Thread_Executing;
59  executing->Wait.return_code = CORE_BARRIER_STATUS_SUCCESSFUL;
60  _ISR_Disable( level );
61  the_barrier->number_of_waiting_threads++;
62  if ( _CORE_barrier_Is_automatic( &the_barrier->Attributes ) ) {
63    if ( the_barrier->number_of_waiting_threads == 
64         the_barrier->Attributes.maximum_count) {
65      executing->Wait.return_code = CORE_BARRIER_STATUS_AUTOMATICALLY_RELEASED;
66      _ISR_Enable( level );
67      _CORE_barrier_Release( the_barrier, id, api_barrier_mp_support );
68      return;
69    }
70  } 
71
72  _Thread_queue_Enter_critical_section( &the_barrier->Wait_queue );
73  executing->Wait.queue          = &the_barrier->Wait_queue;
74  executing->Wait.id             = id;
75  _ISR_Enable( level );
76
77  _Thread_queue_Enqueue( &the_barrier->Wait_queue, timeout );
78}
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