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69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
/****************************************************************************
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*
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* Copyright (c) 2013 PX4 Development Team. All rights reserved.
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* Author: Anton Babushkin <rk3dov@gmail.com>
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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 logbuffer.h
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*
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* Ring FIFO buffer for binary log data.
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*
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* @author Anton Babushkin <rk3dov@gmail.com>
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*/
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#ifndef SDLOG2_RINGBUFFER_H_
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#define SDLOG2_RINGBUFFER_H_
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#include <stdbool.h>
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struct logbuffer_s {
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// all pointers are in bytes
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int write_ptr;
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int read_ptr;
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int size;
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char *data;
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};
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void logbuffer_init(struct logbuffer_s *lb, int size);
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int logbuffer_count(struct logbuffer_s *lb);
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int logbuffer_is_empty(struct logbuffer_s *lb);
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bool logbuffer_write(struct logbuffer_s *lb, void *ptr, int size);
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int logbuffer_get_ptr(struct logbuffer_s *lb, void **ptr, bool *is_part);
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void logbuffer_mark_read(struct logbuffer_s *lb, int n);
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#endif
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