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12374490cb
This tries to make the visibility.h header clearer and better structured. We don't actually need the ifdef for lockstep enabled or disabled because that's now handled elsewhere.
126 lines
4.3 KiB
C
126 lines
4.3 KiB
C
/****************************************************************************
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*
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* Copyright (C) 2012-2019 PX4 Development Team. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name PX4 nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/**
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* @file visibility.h
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*
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* Definitions controlling symbol naming and visibility.
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*
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* This file is normally included automatically by the build system.
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*/
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#pragma once
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#ifdef __EXPORT
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# undef __EXPORT
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#endif
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#define __EXPORT __attribute__ ((visibility ("default")))
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#ifdef __PRIVATE
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# undef __PRIVATE
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#endif
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#define __PRIVATE __attribute__ ((visibility ("hidden")))
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#ifdef __cplusplus
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# define __BEGIN_DECLS extern "C" {
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# define __END_DECLS }
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#else
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# define __BEGIN_DECLS
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# define __END_DECLS
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#endif
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/* exit() is used on NuttX to exit a task. However on Posix, it will exit the
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* whole application, so we prevent its use there. There are cases where it
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* still needs to be used, thus we remap system_exit to exit.
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*/
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#define system_exit exit
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#if !defined(__PX4_NUTTX)
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#include <stdlib.h>
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#ifdef __cplusplus
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#include <cstdlib>
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#endif
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/* We should include cstdlib or stdlib.h but this doesn't
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* compile because many C++ files include stdlib.h and would
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* need to get changed. */
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#pragma GCC poison exit
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#endif // !defined(__PX4_NUTTX)
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/* For SITL lockstep we fake the clock, sleeping, and timedwaits
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* Therefore, we prefix these syscalls with system_. */
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#include <time.h>
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#define system_clock_gettime clock_gettime
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#define system_clock_settime clock_settime
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/* We can't poison clock_settime/clock_gettime because they are
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* used in DriverFramework. */
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#if !defined(__PX4_NUTTX)
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#include <pthread.h>
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// We can't include this for NuttX otherwise we get conflicts for read/write
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// symbols in cannode.
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#endif // !defined(__PX4_NUTTX)
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#define system_pthread_cond_timedwait pthread_cond_timedwait
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/* We can't poison pthread_cond_timedwait because it seems to be used in the
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* <string> include. */
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/* We don't poison usleep and sleep because it is used in dependencies
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* like uavcan and DriverFramework. */
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#if !defined(__PX4_NUTTX)
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#include <unistd.h>
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// We can't include this for NuttX otherwise we get conflicts for read/write
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// symbols in cannode.
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#endif // !defined(__PX4_NUTTX)
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#define system_usleep usleep
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#define system_sleep sleep
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/* On NuttX we call clearenv() so we cannot use getenv() and others (see
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* px4_task_spawn_cmd() in px4_nuttx_tasks.c).
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* We need to include the headers declaring getenv() before the pragma,
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* otherwise it will trigger a poison error. */
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#if defined(__PX4_NUTTX)
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#include <stdlib.h>
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#ifdef __cplusplus
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#include <cstdlib>
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#endif
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/* We should include cstdlib or stdlib.h but this doesn't
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* compile because many C++ files include stdlib.h and would
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* need to get changed. */
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#pragma GCC poison getenv setenv putenv
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#endif // defined(__PX4_NUTTX)
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