include/rtems/ioimpl.h

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSImplClassicIO
0007  *
0008  * @brief This header file provides interfaces used by the I/O Manager
0009  *   implementation.
0010  */
0011
0012 /*
0013  *  COPYRIGHT (c) 1989-2008.
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_IOIMPL_H
0039 #define _RTEMS_IOIMPL_H
0040
0041 #include <rtems/io.h>
0042 #include <rtems/score/isrlock.h>
0043
0044 #ifdef __cplusplus
0045 extern "C" {
0046 #endif /* __cplusplus */
0047
0048 /**
0049  * @defgroup RTEMSImplClassicIO I/O Manager
0050  *
0051  * @ingroup RTEMSImplClassic
0052  *
0053  * @brief This group contains the I/O Manager implementation.
0054  *
0055  * @{
0056  */
0057
0058 extern const size_t _IO_Number_of_drivers;
0059
0060 extern rtems_driver_address_table _IO_Driver_address_table[];
0061
0062 extern bool _IO_All_drivers_initialized;
0063
0064 /**
0065  * @brief Initialization of all device drivers.
0066  *
0067  * Initializes all device drivers.
0068  */
0069 void _IO_Initialize_all_drivers( void );
0070
0071 #if ISR_LOCK_NEEDS_OBJECT
0072 extern ISR_lock_Control _IO_Driver_registration_lock;
0073 #endif
0074
0075 static inline void _IO_Driver_registration_acquire(
0076   ISR_lock_Context *lock_context
0077 )
0078 {
0079   _ISR_lock_ISR_disable_and_acquire(
0080     &_IO_Driver_registration_lock,
0081     lock_context
0082   );
0083 }
0084
0085 static inline void _IO_Driver_registration_release(
0086   ISR_lock_Context *lock_context
0087 )
0088 {
0089   _ISR_lock_Release_and_ISR_enable(
0090     &_IO_Driver_registration_lock,
0091     lock_context
0092   );
0093 }
0094
0095 /** @} */
0096
0097 #ifdef __cplusplus
0098 }
0099 #endif /* __cplusplus */
0100
0101 #endif /* _RTEMS_IOIMPL_H */