Beat Küng a5cdff06d5 param: implement rate-limited autosave
- add a saving delay of 300ms
- save at most once every 2 seconds
2017-04-06 11:49:03 +02:00

73 lines
2.8 KiB
C

/****************************************************************************
*
* Copyright (c) 2015 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.
*
****************************************************************************/
/**
* @file param.h
*
* Global flash based parameter store.
*
* This provides the mechanisms to interface to the PX4
* parameter system but replace the IO with non file based flash
* i/o routines. So that the code my be implemented on a SMALL memory
* foot print device.
*
*/
#ifndef _SYSTEMLIB_FLASHPARAMS_FLASHPARAMS_H
#define _SYSTEMLIB_FLASHPARAMS_FLASHPARAMS_H
#include <stdint.h>
#include <stdbool.h>
#include <sys/types.h>
#include "systemlib/uthash/utarray.h"
__BEGIN_DECLS
/*
* When using the flash based parameter store we have to force
* the param_values and 2 functions to be global
*/
#define FLASH_PARAMS_EXPOSE __EXPORT
__EXPORT extern UT_array *param_values;
__EXPORT int param_set_external(param_t param, const void *val, bool mark_saved, bool notify_changes);
__EXPORT const void *param_get_value_ptr_external(param_t param);
/* The interface hooks to the Flash based storage. The caller is responsible for locking */
__EXPORT int flash_param_save(void);
__EXPORT int flash_param_load(void);
__EXPORT int flash_param_import(void);
__END_DECLS
#endif /* _SYSTEMLIB_FLASHPARAMS_FLASHPARAMS_H */