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pjsip-pjproject/pjlib/include/pj/log.h

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/*
* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __PJ_LOG_H__
#define __PJ_LOG_H__
/**
* @file log.h
* @brief Logging Utility.
*/
#include <pj/types.h>
#include <stdarg.h>
PJ_BEGIN_DECL
/**
* @defgroup PJ_MISC Miscelaneous
*/
/**
* @defgroup PJ_LOG Logging Facility
* @ingroup PJ_MISC
* @{
*
* The PJLIB logging facility is a configurable, flexible, and convenient
* way to write logging or trace information.
*
* To write to the log, one uses construct like below:
*
* <pre>
* ...
* PJ_LOG(3, ("main.c", "Starting hello..."));
* ...
* PJ_LOG(3, ("main.c", "Hello world from process %d", pj_getpid()));
* ...
* </pre>
*
* In the above example, the number @b 3 controls the verbosity level of
* the information (which means "information", by convention). The string
* "main.c" specifies the source or sender of the message.
*
*
* \section pj_log_quick_sample_sec Examples
*
* For examples, see:
* - Simple Log sample: \src{pjlib/src/pjlib-samples/log.c}
*
*/
/**
* Log decoration flag, to be specified with #pj_log_set_decor().
*/
enum pj_log_decoration
{
PJ_LOG_HAS_DAY_NAME = 1, /**< Include day name [default: no] */
PJ_LOG_HAS_YEAR = 2, /**< Include year digit [no] */
PJ_LOG_HAS_MONTH = 4, /**< Include month [no] */
PJ_LOG_HAS_DAY_OF_MON = 8, /**< Include day of month [no] */
PJ_LOG_HAS_TIME = 16, /**< Include time [yes] */
PJ_LOG_HAS_MICRO_SEC = 32, /**< Include microseconds [yes] */
PJ_LOG_HAS_SENDER = 64, /**< Include sender in the log [yes] */
PJ_LOG_HAS_NEWLINE = 128, /**< Terminate each call with newline [yes] */
PJ_LOG_HAS_CR = 256, /**< Include carriage return [no] */
PJ_LOG_HAS_SPACE = 512, /**< Include two spaces before log [yes] */
PJ_LOG_HAS_COLOR = 1024, /**< Colorize logs [yes on win32] */
PJ_LOG_HAS_LEVEL_TEXT = 2048, /**< Include level text string [no] */
PJ_LOG_HAS_THREAD_ID = 4096, /**< Include thread identification [no] */
PJ_LOG_HAS_THREAD_SWC = 8192, /**< Add mark when thread has switched [yes]*/
PJ_LOG_HAS_INDENT =16384 /**< Indentation. Say yes! [yes] */
};
/**
* Write log message.
* This is the main macro used to write text to the logging backend.
*
* @param level The logging verbosity level. Lower number indicates higher
* importance, with level zero indicates fatal error. Only
* numeral argument is permitted (e.g. not variable).
* @param arg Enclosed 'printf' like arguments, with the first
* argument is the sender, the second argument is format
* string and the following arguments are variable number of
* arguments suitable for the format string.
*
* Sample:
* \verbatim
PJ_LOG(2, (__FILE__, "current value is %d", value));
\endverbatim
* @hideinitializer
*/
#define PJ_LOG(level,arg) do { \
if (level <= pj_log_get_level()) { \
pj_log_wrapper_##level(arg); \
} \
} while (0)
/**
* Signature for function to be registered to the logging subsystem to
* write the actual log message to some output device.
*
* @param level Log level.
* @param data Log message, which will be NULL terminated.
* @param len Message length.
*/
typedef void pj_log_func(int level, const char *data, int len);
/**
* Default logging writer function used by front end logger function.
* This function will print the log message to stdout only.
* Application normally should NOT need to call this function, but
* rather use the PJ_LOG macro.
*
* @param level Log level.
* @param buffer Log message.
* @param len Message length.
*/
PJ_DECL(void) pj_log_write(int level, const char *buffer, int len);
#if PJ_LOG_MAX_LEVEL >= 1
/**
* Write to log.
*
* @param sender Source of the message.
* @param level Verbosity level.
* @param format Format.
* @param marker Marker.
*/
PJ_DECL(void) pj_log(const char *sender, int level,
const char *format, va_list marker);
/**
* Change log output function. The front-end logging functions will call
* this function to write the actual message to the desired device.
* By default, the front-end functions use pj_log_write() to write
* the messages, unless it's changed by calling this function.
*
* @param func The function that will be called to write the log
* messages to the desired device.
*/
PJ_DECL(void) pj_log_set_log_func( pj_log_func *func );
/**
* Get the current log output function that is used to write log messages.
*
* @return Current log output function.
*/
PJ_DECL(pj_log_func*) pj_log_get_log_func(void);
/**
* Set maximum log level. Application can call this function to set
* the desired level of verbosity of the logging messages. The bigger the
* value, the more verbose the logging messages will be printed. However,
* the maximum level of verbosity can not exceed compile time value of
* PJ_LOG_MAX_LEVEL.
*
* @param level The maximum level of verbosity of the logging
* messages (6=very detailed..1=error only, 0=disabled)
*/
PJ_DECL(void) pj_log_set_level(int level);
/**
* Get current maximum log verbositylevel.
*
* @return Current log maximum level.
*/
#if 1
PJ_DECL(int) pj_log_get_level(void);
#else
PJ_DECL_DATA(int) pj_log_max_level;
#define pj_log_get_level() pj_log_max_level
#endif
/**
* Set log decoration. The log decoration flag controls what are printed
* to output device alongside the actual message. For example, application
* can specify that date/time information should be displayed with each
* log message.
*
* @param decor Bitmask combination of #pj_log_decoration to control
* the layout of the log message.
*/
PJ_DECL(void) pj_log_set_decor(unsigned decor);
/**
* Get current log decoration flag.
*
* @return Log decoration flag.
*/
PJ_DECL(unsigned) pj_log_get_decor(void);
/**
* Add indentation to log message. Indentation will add PJ_LOG_INDENT_CHAR
* before the message, and is useful to show the depth of function calls.
*
* @param indent The indentation to add or substract. Positive value
* adds current indent, negative value subtracts current
* indent.
*/
PJ_DECL(void) pj_log_add_indent(int indent);
/**
* Set indentation to specific value.
*
* @param indent The indentation value.
*/
PJ_DECL(void) pj_log_set_indent(int indent);
/**
* Get current indentation value.
*
* @return Current indentation value.
*/
PJ_DECL(int) pj_log_get_indent(void);
/**
* Push indentation to the right by default value (PJ_LOG_INDENT_SIZE).
*/
PJ_DECL(void) pj_log_push_indent(void);
/**
* Pop indentation (to the left) by default value (PJ_LOG_INDENT_SIZE).
*/
PJ_DECL(void) pj_log_pop_indent(void);
/**
* Set color of log messages.
*
* @param level Log level which color will be changed.
* @param color Desired color.
*/
PJ_DECL(void) pj_log_set_color(int level, pj_color_t color);
/**
* Get color of log messages.
*
* @param level Log level which color will be returned.
* @return Log color.
*/
PJ_DECL(pj_color_t) pj_log_get_color(int level);
/**
* Internal function to be called by pj_init()
*/
pj_status_t pj_log_init(void);
#else /* #if PJ_LOG_MAX_LEVEL >= 1 */
/**
* Change log output function. The front-end logging functions will call
* this function to write the actual message to the desired device.
* By default, the front-end functions use pj_log_write() to write
* the messages, unless it's changed by calling this function.
*
* @param func The function that will be called to write the log
* messages to the desired device.
*/
# define pj_log_set_log_func(func)
/**
* Write to log.
*
* @param sender Source of the message.
* @param level Verbosity level.
* @param format Format.
* @param marker Marker.
*/
# define pj_log(sender, level, format, marker)
/**
* Set maximum log level. Application can call this function to set
* the desired level of verbosity of the logging messages. The bigger the
* value, the more verbose the logging messages will be printed. However,
* the maximum level of verbosity can not exceed compile time value of
* PJ_LOG_MAX_LEVEL.
*
* @param level The maximum level of verbosity of the logging
* messages (6=very detailed..1=error only, 0=disabled)
*/
# define pj_log_set_level(level)
/**
* Set log decoration. The log decoration flag controls what are printed
* to output device alongside the actual message. For example, application
* can specify that date/time information should be displayed with each
* log message.
*
* @param decor Bitmask combination of #pj_log_decoration to control
* the layout of the log message.
*/
# define pj_log_set_decor(decor)
/**
* Add indentation to log message. Indentation will add PJ_LOG_INDENT_CHAR
* before the message, and is useful to show the depth of function calls.
*
* @param indent The indentation to add or substract. Positive value
* adds current indent, negative value subtracts current
* indent.
*/
# define pj_log_add_indent(indent)
/**
* Set indentation to specific value.
*
* @param indent The indentation value.
*/
# define pj_log_set_indent(indent)
/**
* Get current indentation value.
*
* @return Current indentation value.
*/
# define pj_log_get_indent() 0
/**
* Push indentation to the right by default value (PJ_LOG_INDENT_SIZE).
*/
# define pj_log_push_indent()
/**
* Pop indentation (to the left) by default value (PJ_LOG_INDENT_SIZE).
*/
# define pj_log_pop_indent()
/**
* Set color of log messages.
*
* @param level Log level which color will be changed.
* @param color Desired color.
*/
# define pj_log_set_color(level, color)
/**
* Get current maximum log verbositylevel.
*
* @return Current log maximum level.
*/
# define pj_log_get_level() 0
/**
* Get current log decoration flag.
*
* @return Log decoration flag.
*/
# define pj_log_get_decor() 0
/**
* Get color of log messages.
*
* @param level Log level which color will be returned.
* @return Log color.
*/
# define pj_log_get_color(level) 0
/**
* Internal.
*/
# define pj_log_init() PJ_SUCCESS
#endif /* #if PJ_LOG_MAX_LEVEL >= 1 */
/**
* @}
*/
/* **************************************************************************/
/*
* Log functions implementation prototypes.
* These functions are called by PJ_LOG macros according to verbosity
* level specified when calling the macro. Applications should not normally
* need to call these functions directly.
*/
/**
* @def pj_log_wrapper_1(arg)
* Internal function to write log with verbosity 1. Will evaluate to
* empty expression if PJ_LOG_MAX_LEVEL is below 1.
* @param arg Log expression.
*/
#if PJ_LOG_MAX_LEVEL >= 1
#define pj_log_wrapper_1(arg) pj_log_1 arg
/** Internal function. */
PJ_DECL(void) pj_log_1(const char *src, const char *format, ...)
PJ_PRINT_FUNC_DECOR(2);
#else
#define pj_log_wrapper_1(arg)
#endif
/**
* @def pj_log_wrapper_2(arg)
* Internal function to write log with verbosity 2. Will evaluate to
* empty expression if PJ_LOG_MAX_LEVEL is below 2.
* @param arg Log expression.
*/
#if PJ_LOG_MAX_LEVEL >= 2
#define pj_log_wrapper_2(arg) pj_log_2 arg
/** Internal function. */
PJ_DECL(void) pj_log_2(const char *src, const char *format, ...)
PJ_PRINT_FUNC_DECOR(2);
#else
#define pj_log_wrapper_2(arg)
#endif
/**
* @def pj_log_wrapper_3(arg)
* Internal function to write log with verbosity 3. Will evaluate to
* empty expression if PJ_LOG_MAX_LEVEL is below 3.
* @param arg Log expression.
*/
#if PJ_LOG_MAX_LEVEL >= 3
#define pj_log_wrapper_3(arg) pj_log_3 arg
/** Internal function. */
PJ_DECL(void) pj_log_3(const char *src, const char *format, ...)
PJ_PRINT_FUNC_DECOR(2);
#else
#define pj_log_wrapper_3(arg)
#endif
/**
* @def pj_log_wrapper_4(arg)
* Internal function to write log with verbosity 4. Will evaluate to
* empty expression if PJ_LOG_MAX_LEVEL is below 4.
* @param arg Log expression.
*/
#if PJ_LOG_MAX_LEVEL >= 4
#define pj_log_wrapper_4(arg) pj_log_4 arg
/** Internal function. */
PJ_DECL(void) pj_log_4(const char *src, const char *format, ...)
PJ_PRINT_FUNC_DECOR(2);
#else
#define pj_log_wrapper_4(arg)
#endif
/**
* @def pj_log_wrapper_5(arg)
* Internal function to write log with verbosity 5. Will evaluate to
* empty expression if PJ_LOG_MAX_LEVEL is below 5.
* @param arg Log expression.
*/
#if PJ_LOG_MAX_LEVEL >= 5
#define pj_log_wrapper_5(arg) pj_log_5 arg
/** Internal function. */
PJ_DECL(void) pj_log_5(const char *src, const char *format, ...)
PJ_PRINT_FUNC_DECOR(2);
#else
#define pj_log_wrapper_5(arg)
#endif
/**
* @def pj_log_wrapper_6(arg)
* Internal function to write log with verbosity 6. Will evaluate to
* empty expression if PJ_LOG_MAX_LEVEL is below 6.
* @param arg Log expression.
*/
#if PJ_LOG_MAX_LEVEL >= 6
#define pj_log_wrapper_6(arg) pj_log_6 arg
/** Internal function. */
PJ_DECL(void) pj_log_6(const char *src, const char *format, ...)
PJ_PRINT_FUNC_DECOR(2);
#else
#define pj_log_wrapper_6(arg)
#endif
PJ_END_DECL
#endif /* __PJ_LOG_H__ */
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