netsurf/utils/log.h
Vincent Sanders faf9b9d919 Improve logging interface to reduce overhead
This reduces logging overhead by only calling the log output function
once instead of three times.

Additionally the nslog_gettime interface no longer needs to be
exported and the static function is directly inlined further reducing
function call overhead.

Finally the appending of a newline uses fputc instead of a full printf
call which is considerably more simple and further reduces overhead
time.
2015-05-29 16:18:18 +01:00

73 lines
2.0 KiB
C

/*
* Copyright 2003 James Bursa <bursa@users.sourceforge.net>
* Copyright 2004 John Tytgat <joty@netsurf-browser.org>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf 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; version 2 of the License.
*
* NetSurf 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/>.
*/
#ifndef _NETSURF_LOG_H_
#define _NETSURF_LOG_H_
#include <stdio.h>
#include <stdbool.h>
#include "utils/errors.h"
extern bool verbose_log;
/**
* Ensures the FILE handle is available to write logging to.
*
* This is provided by the frontends if required
*/
typedef bool(nslog_ensure_t)(FILE *fptr);
/**
* Initialise the logging system.
*
* Sets up everything required for logging. Processes the argv passed
* to remove the -v switch for verbose logging. If necessary ensures
* the output file handle is available.
*/
extern nserror nslog_init(nslog_ensure_t *ensure, int *pargc, char **argv);
#ifdef NDEBUG
# define LOG(format, ...) ((void) 0)
#else
extern void nslog_log(const char *file, const char *func, int ln, const char *format, ...) __attribute__ ((format (printf, 4, 5)));
# ifdef __GNUC__
# define LOG_FN __PRETTY_FUNCTION__
# define LOG_LN __LINE__
# elif defined(__CC_NORCROFT)
# define LOG_FN __func__
# define LOG_LN __LINE__
# else
# define LOG_FN ""
# define LOG_LN __LINE__
# endif
#define LOG(format, args...) \
do { \
if (verbose_log) { \
nslog_log(__FILE__, LOG_FN, LOG_LN, format , ##args); \
} \
} while(0)
#endif
#endif