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/****************************************************************************
*
* Copyright (c) 2012, 2013 PX4 Development Team. All rights reserved.
* Author: Lorenz Meier <lm@inf.ethz.ch>
*
* 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 mavlink_log.h
* MAVLink text logging.
*
* @author Lorenz Meier <lm@inf.ethz.ch>
*/
#ifndef MAVLINK_LOG
#define MAVLINK_LOG
/*
* IOCTL interface for sending log messages.
*/
#include <sys/ioctl.h>
/**
* The mavlink log device node; must be opened before messages
* can be logged.
*/
#define MAVLINK_LOG_DEVICE "/dev/mavlink"
/**
* The maximum string length supported.
*/
#define MAVLINK_LOG_MAXLEN 50
#define MAVLINK_IOC_SEND_TEXT_INFO _IOC(0x1100, 1)
#define MAVLINK_IOC_SEND_TEXT_CRITICAL _IOC(0x1100, 2)
#define MAVLINK_IOC_SEND_TEXT_EMERGENCY _IOC(0x1100, 3)
#ifdef __cplusplus
extern "C" {
#endif
__EXPORT void mavlink_vasprintf(int _fd, int severity, const char *fmt, ...);
#ifdef __cplusplus
}
#endif
/*
* The va_args implementation here is not beautiful, but obviously we run into the same issues
* the GCC devs saw, and are using their solution:
*
* http://gcc.gnu.org/onlinedocs/cpp/Variadic-Macros.html
*/
/**
* Send a mavlink emergency message.
*
* @param _fd A file descriptor returned from open(MAVLINK_LOG_DEVICE, 0);
* @param _text The text to log;
*/
#define mavlink_log_emergency(_fd, _text, ...) mavlink_vasprintf(_fd, MAVLINK_IOC_SEND_TEXT_EMERGENCY, _text, ##__VA_ARGS__);
/**
* Send a mavlink critical message.
*
* @param _fd A file descriptor returned from open(MAVLINK_LOG_DEVICE, 0);
* @param _text The text to log;
*/
#define mavlink_log_critical(_fd, _text, ...) mavlink_vasprintf(_fd, MAVLINK_IOC_SEND_TEXT_CRITICAL, _text, ##__VA_ARGS__);
/**
* Send a mavlink info message.
*
* @param _fd A file descriptor returned from open(MAVLINK_LOG_DEVICE, 0);
* @param _text The text to log;
*/
#define mavlink_log_info(_fd, _text, ...) mavlink_vasprintf(_fd, MAVLINK_IOC_SEND_TEXT_INFO, _text, ##__VA_ARGS__);
struct mavlink_logmessage {
char text[MAVLINK_LOG_MAXLEN + 1];
unsigned char severity;
};
struct mavlink_logbuffer {
unsigned int start;
unsigned int size;
int count;
struct mavlink_logmessage *elems;
};
void mavlink_logbuffer_init(struct mavlink_logbuffer *lb, int size);
void mavlink_logbuffer_destroy(struct mavlink_logbuffer *lb);
int mavlink_logbuffer_is_full(struct mavlink_logbuffer *lb);
int mavlink_logbuffer_is_empty(struct mavlink_logbuffer *lb);
void mavlink_logbuffer_write(struct mavlink_logbuffer *lb, const struct mavlink_logmessage *elem);
int mavlink_logbuffer_read(struct mavlink_logbuffer *lb, struct mavlink_logmessage *elem);
void mavlink_logbuffer_vasprintf(struct mavlink_logbuffer *lb, int severity, const char *fmt, ...);
#endif
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