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/*
* Copyright (c) 2017-2019 Richard Braun.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*
* System logging.
*/
#ifndef KERN_LOG_H
#define KERN_LOG_H
#include <stdarg.h>
#include <kern/init.h>
enum {
LOG_EMERG,
LOG_ALERT,
LOG_CRIT,
LOG_ERR,
LOG_WARNING,
LOG_NOTICE,
LOG_INFO,
LOG_DEBUG,
LOG_NR_LEVELS,
};
/*
* Type for function pointers that may be used as either a log function
* or printf.
*
* One call to a log print function produces a single log line, with a
* newline character.
*/
typedef int (*log_print_fn_t)(const char *format, ...)
__attribute__((format(printf, 1, 2)));
/*
* Generate a message and send it to the log thread.
*
* The arguments and return value are similar to printf(), with
* these exceptions :
* - a level is associated to each log message
* - processing stops at the first terminating null byte or newline
* character, whichever occurs first
*
* This function may safely be called in interrupt context.
*/
int log_msg(unsigned int level, const char *format, ...)
__attribute__((format(printf, 2, 3)));
int log_vmsg(unsigned int level, const char *format, va_list ap)
__attribute__((format(printf, 2, 0)));
/*
* Convenience wrappers.
*/
int log_emerg(const char *format, ...) __attribute__((format(printf, 1, 2)));
int log_alert(const char *format, ...) __attribute__((format(printf, 1, 2)));
int log_crit(const char *format, ...) __attribute__((format(printf, 1, 2)));
int log_err(const char *format, ...) __attribute__((format(printf, 1, 2)));
int log_warning(const char *format, ...) __attribute__((format(printf, 1, 2)));
int log_notice(const char *format, ...) __attribute__((format(printf, 1, 2)));
int log_info(const char *format, ...) __attribute__((format(printf, 1, 2)));
int log_debug(const char *format, ...) __attribute__((format(printf, 1, 2)));
int log_vemerg(const char *format, va_list ap)
__attribute__((format(printf, 1, 0)));
int log_valert(const char *format, va_list ap)
__attribute__((format(printf, 1, 0)));
int log_vcrit(const char *format, va_list ap)
__attribute__((format(printf, 1, 0)));
int log_verr(const char *format, va_list ap)
__attribute__((format(printf, 1, 0)));
int log_vwarning(const char *format, va_list ap)
__attribute__((format(printf, 1, 0)));
int log_vnotice(const char *format, va_list ap)
__attribute__((format(printf, 1, 0)));
int log_vinfo(const char *format, va_list ap)
__attribute__((format(printf, 1, 0)));
int log_vdebug(const char *format, va_list ap)
__attribute__((format(printf, 1, 0)));
/*
* The bulletin returned by this function is used to notify the initial log
* dump so that console output is well ordered.
*/
struct bulletin * log_get_bulletin(void);
/*
* This init operation provides :
* - message logging
*
* The log thread isn't yet started and messages are merely stored in an
* internal buffer.
*/
INIT_OP_DECLARE(log_setup);
#endif /* KERN_LOG_H */
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