rtems/posix/semaphore.h

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @brief Private Support Information for POSIX Semaphores
0007  *
0008  * This include file contains all the private support information for
0009  * POSIX Semaphores.
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_SEMAPHORE_H
0039 #define _RTEMS_POSIX_SEMAPHORE_H
0040
0041 #include <rtems/score/objectdata.h>
0042
0043 #include <limits.h>
0044 #include <semaphore.h>
0045
0046 #ifdef __cplusplus
0047 extern "C" {
0048 #endif
0049
0050 /**
0051  * @defgroup POSIXSemaphorePrivate POSIX Semaphore Private Support
0052  *
0053  * @ingroup POSIXAPI
0054  *
0055  * This defines the internal implementation support for POSIX semaphores.
0056  */
0057 /**@{*/
0058
0059 /*
0060  *  Data Structure used to manage a POSIX semaphore
0061  */
0062
0063 typedef struct {
0064    Objects_Control Object;
0065    sem_t           Semaphore;
0066    bool            linked;
0067    uint32_t        open_count;
0068 }  POSIX_Semaphore_Control;
0069
0070 /**
0071  * @brief The POSIX Semaphore objects information.
0072  */
0073 extern Objects_Information _POSIX_Semaphore_Information;
0074
0075 /**
0076  * @brief Macro to define the objects information for the POSIX Semaphore
0077  * objects.
0078  *
0079  * This macro should only be used by <rtems/confdefs.h>.
0080  *
0081  * @param max The configured object maximum (the OBJECTS_UNLIMITED_OBJECTS flag
0082  * may be set).
0083  */
0084 #define POSIX_SEMAPHORE_INFORMATION_DEFINE( max ) \
0085   OBJECTS_INFORMATION_DEFINE( \
0086     _POSIX_Semaphore, \
0087     OBJECTS_POSIX_API, \
0088     OBJECTS_POSIX_SEMAPHORES, \
0089     POSIX_Semaphore_Control, \
0090     max, \
0091     _POSIX_PATH_MAX, \
0092     NULL \
0093   )
0094
0095 /** @} */
0096
0097 #ifdef __cplusplus
0098 }
0099 #endif
0100
0101 #endif
0102 /*  end of include file */