rtems/posix/barrierimpl.h

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @brief Inlined Routines from the POSIX Barrier Manager
0007  *
0008  * This file contains the static inlin implementation of the inlined
0009  * routines from the POSIX Barrier Manager.
0010  */
0011
0012 /*
0013  *  COPYRIGHT (c) 1989-2011.
0014  *  On-Line Applications Research Corporation (OAR).
0015  *
0016  *  Copyright (c) 2017 embedded brains GmbH & Co. KG
0017  *
0018  * Redistribution and use in source and binary forms, with or without
0019  * modification, are permitted provided that the following conditions
0020  * are met:
0021  * 1. Redistributions of source code must retain the above copyright
0022  *    notice, this list of conditions and the following disclaimer.
0023  * 2. Redistributions in binary form must reproduce the above copyright
0024  *    notice, this list of conditions and the following disclaimer in the
0025  *    documentation and/or other materials provided with the distribution.
0026  *
0027  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0028  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0029  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0030  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0031  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0032  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0033  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0034  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0035  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0036  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0037  * POSSIBILITY OF SUCH DAMAGE.
0038  */
0039
0040 #ifndef _RTEMS_POSIX_BARRIERIMPL_H
0041 #define _RTEMS_POSIX_BARRIERIMPL_H
0042
0043 #include <errno.h>
0044 #include <pthread.h>
0045
0046 #include <rtems/score/percpu.h>
0047 #include <rtems/score/threadqimpl.h>
0048
0049 #ifdef __cplusplus
0050 extern "C" {
0051 #endif
0052
0053 #define POSIX_BARRIER_MAGIC 0x1cf03773UL
0054
0055 #define POSIX_BARRIER_TQ_OPERATIONS &_Thread_queue_Operations_FIFO
0056
0057 typedef struct {
0058   unsigned long flags;
0059   Thread_queue_Syslock_queue Queue;
0060   unsigned int count;
0061   unsigned int waiting_threads;
0062 } POSIX_Barrier_Control;
0063
0064 static inline POSIX_Barrier_Control *_POSIX_Barrier_Get(
0065   pthread_barrier_t *_barrier
0066 )
0067 {
0068   return (POSIX_Barrier_Control *) _barrier;
0069 }
0070
0071 static inline Thread_Control *_POSIX_Barrier_Queue_acquire(
0072   POSIX_Barrier_Control *barrier,
0073   Thread_queue_Context  *queue_context
0074 )
0075 {
0076   ISR_Level       level;
0077   Thread_Control *executing;
0078
0079   _Thread_queue_Context_initialize( queue_context );
0080   _Thread_queue_Context_ISR_disable( queue_context, level );
0081   _Thread_queue_Context_set_ISR_level( queue_context, level );
0082   executing = _Thread_Executing;
0083   _Thread_queue_Queue_acquire_critical(
0084     &barrier->Queue.Queue,
0085     &executing->Potpourri_stats,
0086     &queue_context->Lock_context.Lock_context
0087   );
0088
0089   return executing;
0090 }
0091
0092 static inline void _POSIX_Barrier_Queue_release(
0093   POSIX_Barrier_Control *barrier,
0094   Thread_queue_Context  *queue_context
0095 )
0096 {
0097   _Thread_queue_Queue_release(
0098     &barrier->Queue.Queue,
0099     &queue_context->Lock_context.Lock_context
0100   );
0101 }
0102
0103 #define POSIX_BARRIER_VALIDATE_OBJECT( bar ) \
0104   do { \
0105     if ( \
0106       ( bar ) == NULL \
0107         || ( (uintptr_t) ( bar ) ^ POSIX_BARRIER_MAGIC ) != ( bar )->_flags \
0108     ) { \
0109       return EINVAL; \
0110     } \
0111   } while ( 0 )
0112
0113 #ifdef __cplusplus
0114 }
0115 #endif
0116
0117 #endif
0118 /*  end of include file */