rtems/posix/rwlockimpl.h

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @brief Inlined Routines from the POSIX RWLock Manager
0007  *
0008  * This file contains the static inlin implementation of the inlined
0009  * routines from the POSIX RWLock Manager.
0010  */
0011
0012 /*
0013  *  COPYRIGHT (c) 1989-2011.
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 #ifndef _RTEMS_POSIX_RWLOCKIMPL_H
0039 #define _RTEMS_POSIX_RWLOCKIMPL_H
0040
0041 #include <rtems/score/corerwlockimpl.h>
0042
0043 #include <errno.h>
0044 #include <pthread.h>
0045
0046 #ifdef __cplusplus
0047 extern "C" {
0048 #endif
0049
0050 #define POSIX_RWLOCK_MAGIC 0x9621dabdUL
0051
0052 typedef struct {
0053   unsigned long flags;
0054   CORE_RWLock_Control RWLock;
0055 } POSIX_RWLock_Control;
0056
0057 static inline POSIX_RWLock_Control *_POSIX_RWLock_Get(
0058   pthread_rwlock_t *rwlock
0059 )
0060 {
0061   return (POSIX_RWLock_Control *) rwlock;
0062 }
0063
0064 bool _POSIX_RWLock_Auto_initialization( POSIX_RWLock_Control *the_rwlock );
0065
0066 #define POSIX_RWLOCK_VALIDATE_OBJECT( rw ) \
0067   do { \
0068     if ( ( rw ) == NULL ) { \
0069       return EINVAL; \
0070     } \
0071     if ( ( (uintptr_t) ( rw ) ^ POSIX_RWLOCK_MAGIC ) != ( rw )->flags ) { \
0072       if ( !_POSIX_RWLock_Auto_initialization( rw ) ) { \
0073         return EINVAL; \
0074       } \
0075     } \
0076   } while ( 0 )
0077
0078 #ifdef __cplusplus
0079 }
0080 #endif
0081
0082 #endif
0083 /*  end of include file */