external_reset_lockout.cpp
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/****************************************************************************
*
* Copyright (C) 2020 PX4 Development Team. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#include <px4_platform_common/external_reset_lockout.h>
#if defined(BOARD_INDICATE_EXTERNAL_LOCKOUT_STATE)
#include <px4_platform_common/atomic.h>
static px4::atomic<uint8_t> lockout_states {0};
void px4_indicate_external_reset_lockout(LockoutComponent component, bool enabled)
{
const uint8_t component_mask = 1 << (uint8_t)component;
uint8_t current_state;
if (enabled) {
current_state = lockout_states.fetch_or(component_mask) | component_mask;
} else {
current_state = lockout_states.fetch_and(~component_mask) & ~component_mask;
}
BOARD_INDICATE_EXTERNAL_LOCKOUT_STATE(current_state != 0);
}
#else
void px4_indicate_external_reset_lockout(LockoutComponent component, bool enabled) {}
#endif /* BOARD_INDICATE_EXTERNAL_LOCKOUT_STATE */