rtems/src/barriercreate.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSImplClassicBarrier
0007  *
0008  * @brief This source file contains the implementation of
0009  *   rtems_barrier_create() and the Barrier Manager system initialization.
0010  */
0011
0012 /*
0013  *  COPYRIGHT (c) 1989-2006.
0014  *  On-Line Applications Research Corporation (OAR).
0015  *
0016  * Redistribution and use in source and binary forms, with or without
0017  * modification, are permitted provided that the following conditions
0018  * are met:
0019  * 1. Redistributions of source code must retain the above copyright
0020  *    notice, this list of conditions and the following disclaimer.
0021  * 2. Redistributions in binary form must reproduce the above copyright
0022  *    notice, this list of conditions and the following disclaimer in the
0023  *    documentation and/or other materials provided with the distribution.
0024  *
0025  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0026  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0027  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0028  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0029  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0030  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0031  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0032  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0033  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0034  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0035  * POSSIBILITY OF SUCH DAMAGE.
0036  */
0037
0038 #ifdef HAVE_CONFIG_H
0039 #include "config.h"
0040 #endif
0041
0042 #include <rtems/rtems/barrierimpl.h>
0043 #include <rtems/rtems/status.h>
0044 #include <rtems/rtems/support.h>
0045 #include <rtems/rtems/attrimpl.h>
0046 #include <rtems/score/isr.h>
0047 #include <rtems/sysinit.h>
0048
0049 rtems_status_code rtems_barrier_create(
0050   rtems_name           name,
0051   rtems_attribute      attribute_set,
0052   uint32_t             maximum_waiters,
0053   rtems_id            *id
0054 )
0055 {
0056   Barrier_Control *the_barrier;
0057   uint32_t         maximum_count;
0058
0059   if ( !rtems_is_name_valid( name ) ) {
0060     return RTEMS_INVALID_NAME;
0061   }
0062
0063   if ( id == NULL ) {
0064     return RTEMS_INVALID_ADDRESS;
0065   }
0066
0067   if ( _Attributes_Is_barrier_automatic( attribute_set ) ) {
0068     if ( maximum_waiters == 0 ) {
0069       return RTEMS_INVALID_NUMBER;
0070     }
0071
0072     maximum_count = maximum_waiters;
0073   } else {
0074     maximum_count = CORE_BARRIER_MANUAL_RELEASE_MAXIMUM_COUNT;
0075   }
0076
0077   the_barrier = _Barrier_Allocate();
0078
0079   if ( the_barrier == NULL ) {
0080     _Objects_Allocator_unlock();
0081     return RTEMS_TOO_MANY;
0082   }
0083
0084   _CORE_barrier_Initialize( &the_barrier->Barrier, maximum_count );
0085
0086   *id = _Objects_Open_u32( &_Barrier_Information, &the_barrier->Object, name );
0087   _Objects_Allocator_unlock();
0088   return RTEMS_SUCCESSFUL;
0089 }
0090
0091 static void _Barrier_Manager_initialization( void )
0092 {
0093   _Objects_Initialize_information( &_Barrier_Information );
0094 }
0095
0096 RTEMS_SYSINIT_ITEM(
0097   _Barrier_Manager_initialization,
0098   RTEMS_SYSINIT_CLASSIC_BARRIER,
0099   RTEMS_SYSINIT_ORDER_MIDDLE
0100 );