RTEMS: cpukit/include/rtems/posix/barrierimpl.h Source File

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barrierimpl.h
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1
10/*
11 * COPYRIGHT (c) 1989-2011.
12 * On-Line Applications Research Corporation (OAR).
13 *
14 * Copyright (c) 2017 embedded brains GmbH
15 *
16 * The license and distribution terms for this file may be
17 * found in the file LICENSE in this distribution or at
18 * http://www.rtems.org/license/LICENSE.
19 */
20
21#ifndef _RTEMS_POSIX_BARRIERIMPL_H
22#define _RTEMS_POSIX_BARRIERIMPL_H
23
24#include <errno.h>
25#include <pthread.h>
26
27#include <rtems/score/percpu.h>
28#include <rtems/score/threadqimpl.h>
29
30#ifdef __cplusplus
31extern "C" {
32#endif
33
34#define POSIX_BARRIER_MAGIC 0x1cf03773UL
35
36#define POSIX_BARRIER_TQ_OPERATIONS &_Thread_queue_Operations_FIFO
37
38 typedef struct {
39 unsigned long flags;
40 Thread_queue_Syslock_queue Queue;
41 unsigned int count;
42 unsigned int waiting_threads;
43} POSIX_Barrier_Control;
44
45static inline POSIX_Barrier_Control *_POSIX_Barrier_Get(
46 pthread_barrier_t *_barrier
47)
48{
49 return (POSIX_Barrier_Control *) _barrier;
50}
51
52static inline Thread_Control *_POSIX_Barrier_Queue_acquire(
53 POSIX_Barrier_Control *barrier,
54 Thread_queue_Context *queue_context
55)
56{
57 ISR_Level level;
58 Thread_Control *executing;
59
60 _Thread_queue_Context_initialize( queue_context );
61 _Thread_queue_Context_ISR_disable( queue_context, level );
62 _Thread_queue_Context_set_ISR_level( queue_context, level );
63 executing = _Thread_Executing;
64 _Thread_queue_Queue_acquire_critical(
65 &barrier->Queue.Queue,
66 &executing->Potpourri_stats,
67 &queue_context->Lock_context.Lock_context
68 );
69
70 return executing;
71}
72
73static inline void _POSIX_Barrier_Queue_release(
74 POSIX_Barrier_Control *barrier,
75 Thread_queue_Context *queue_context
76)
77{
78 _Thread_queue_Queue_release(
79 &barrier->Queue.Queue,
80 &queue_context->Lock_context.Lock_context
81 );
82}
83
84#define POSIX_BARRIER_VALIDATE_OBJECT( bar ) \
85 do { \
86 if ( \
87 ( bar ) == NULL \
88 || ( (uintptr_t) ( bar ) ^ POSIX_BARRIER_MAGIC ) != ( bar )->_flags \
89 ) { \
90 return EINVAL; \
91 } \
92 } while ( 0 )
93
94#ifdef __cplusplus
95}
96#endif
97
98#endif
99/* end of include file */
ISR_Level
uint32_t ISR_Level
Definition: isrlevel.h:41
_Thread_queue_Context_set_ISR_level
RTEMS_INLINE_ROUTINE void _Thread_queue_Context_set_ISR_level(Thread_queue_Context *queue_context, ISR_Level level)
Sets the thread queue context ISR level.
Definition: threadqimpl.h:411
_Thread_queue_Queue_release
RTEMS_INLINE_ROUTINE void _Thread_queue_Queue_release(Thread_queue_Queue *queue, ISR_lock_Context *lock_context)
Releases the thread queue queue and enables interrupts.
Definition: threadqimpl.h:625
_Thread_queue_Context_initialize
RTEMS_INLINE_ROUTINE void _Thread_queue_Context_initialize(Thread_queue_Context *queue_context)
Initializes a thread queue context.
Definition: threadqimpl.h:152
pthread.h
POSIX Threads Private Support.
percpu.h
POSIX_Barrier_Control
Definition: barrierimpl.h:38
Thread_queue_Context
Thread queue context for the thread queue methods.
Definition: threadq.h:198
Thread_queue_Context::Lock_context
Thread_queue_Lock_context Lock_context
The lock context for the thread queue acquire and release operations.
Definition: threadq.h:203
Thread_queue_Lock_context::Lock_context
ISR_lock_Context Lock_context
The lock context for the thread queue acquire and release operations.
Definition: threadq.h:130
Thread_queue_Syslock_queue
Thread queue with a layout compatible to struct _Thread_queue_Queue defined in Newlib <sys/lock....
Definition: threadqimpl.h:54
_Thread_Control
Definition: thread.h:732
threadqimpl.h
Constants and Structures Associated with the Manipulation of Objects.