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README
LGPL-2.1
iLOG3是一个轻便易用、概念简单,高性能、多层接口、原生跨平台、(规范使用时)线程安全的遵循LGPL开源协议的标准c快速日志函数库。

基本特性如下:
·原生跨平台,这意味着你的软件在日志层面上是可轻松移植的,目前支持WINDOWS & UNIX & Linux ,iLOG3会在不同的操作系统上做相应的实现和优化
·五类日志等级
·变参的日志函数和日志宏
·行日志风格方案选配
·输出介质有文件、标准输出、标准错误输出、syslogd或WINDOWS EVENT、自定义介质

高级特性如下:
·支持日志选项组合
·支持按日志文件大小、每天、每小时转档
·支持行日志风格自定义回调函数,很容易定制自己的行日志格式
·支持日志文件的打开、输出、关闭自定义回调函数,很容易扩展成日志输出到远程日志服务器落地
·线程安全、简易MDC、基于线程本地存储的缺省全局日志句柄

 分层实施“日志句柄层(LOG)->日志句柄集合层(LOGS)->配置文件接口层(LOGCONF、LOGSCONF)”。其实大部分用户的 日志需求很简单,一个进程写一个日志文件(使用日志句柄层函数即可),但也考虑到另外一些用户有多个输出对象需求(使用日志句柄集合层函数即可),还有用 户喜欢用外部配置文件来配置日志(使用配置文件接口层函数即可),不同用户在不同项目场景中使用iLOG3的不同层接口,不至于杀鸡用牛刀、小刀砍大树。

我还开发了一个姐妹函数库iLOG3CONF_SML来支持用SML标记语言配置文件来配置日志句柄,有兴趣的朋友也可以调用日志句柄层或日志句柄集合层函 数开发自己的iLOG3CONF_*,实现用XML或现在流行的json或自己项目统一配置文件格式,来实现用外部配置文件配置iLOG3日志句柄环境。

此外,源代码结构也比较简单,只有三对源文件,便于搬运、嵌入和修改。

函数调用方式使用代码示例: 
[code=c]
#include <stdio.h>

#include "LOG.h"

#define LOG_STYLES_HELLO        ( LOG_STYLE_DATETIMEMS | LOG_STYLE_LOGLEVEL | LOG_STYLE_PID | LOG_STYLE_TID | LOG_STYLE_SOURCE | LOG_STYLE_FORMAT | LOG_STYLE_NEWLINE )

int test_hello()
{
        char                buffer[ 64 + 1 ] = "" ;
        long                buflen = sizeof(buffer)-1 ;
        
        /* 创建日志句柄 */
        if(CreateLogHandleG() == NULL )
        {
                printf( "创建日志句柄失败errno[%d]\n" , errno );
                return -1;
        }
        else
        {
                printf( "创建日志句柄成功\n" );
        }
        
        /* 设置日志输出文件名 */
        SetLogOutputG( LOG_OUTPUT_FILE , "test_iLOG3.log" , LOG_NO_OUTPUTFUNC );
        /* 设置当前日志过滤等级 */
        SetLogLevelG( LOG_LEVEL_INFO );
        /* 设置当前行日志风格方案 */
        SetLogStylesG( LOG_STYLES_HELLO , LOG_NO_STYLEFUNC);
        
        /* 以不同日志等级写行日志 */
        DEBUGLOGG( "hello DEBUG" ); /* 这行日志因等级不够,被华丽的过滤了 */
        INFOLOGG( "hello INFO" );
        WARNLOGG( "hello WARN" );
        ERRORLOGG( "hello ERROR" );
        FATALLOGG( "hello FATAL" );
        
        /* 以不同日志等级写十六进制块日志 */
        DEBUGHEXLOGG( buffer , buflen , "hello DEBUG buffer[%ld]" , buflen ); /* 又一个被华丽的过滤 */
        INFOHEXLOGG( buffer , buflen , "hello INFO buffer[%ld]" , buflen );
        WARNHEXLOGG( buffer , buflen , "hello WARN buffer[%ld]" , buflen );
        ERRORHEXLOGG( buffer , buflen , "hello ERROR buffer[%ld]" , buflen );
        FATALHEXLOGG( buffer , buflen , "hello FATAL buffer[%ld]" , buflen );
        
        /* 销毁日志句柄 */
        DestroyLogHandleG();
        printf( "销毁日志句柄\n" );
        
        return 0;
}

int main()
{
        return -test_hello();
}
[/code]
说明一下,代码先创建了一个日志句柄,设置一些属性,然后刷刷刷的写日志,最后销毁日志句柄。
编译、链接、执行
[code]
$ gcc -g -fPIC -Wall -Werror -O2 -I. -std=c99 -I/home/calvin/exinc/iLOG3  -c test_LOG.c
$ gcc -g -fPIC -Wall -Werror -O2 -o test_LOG test_LOG.o -L. -std=c99 -L/home/calvin/exlib -liLOG3
$ ./test_LOG
创建日志句柄成功
释放日志句柄
$ cat test_iLOG3.log
2014-02-10 00:26:07.418678 | INFO  | 2045:3086292688:test_iLOG3.c:32 | hello INFO
2014-02-10 00:26:07.419236 | WARN  | 2045:3086292688:test_iLOG3.c:33 | hello WARN
2014-02-10 00:26:07.419506 | ERROR | 2045:3086292688:test_iLOG3.c:34 | hello ERROR
2014-02-10 00:26:07.419518 | FATAL | 2045:3086292688:test_iLOG3.c:35 | hello FATAL
2014-02-10 00:26:07.419529 | INFO  | 2045:3086292688:test_iLOG3.c:39 | hello INFO buffer[64]
            0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F    0123456789ABCDEF
0x00000000   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000010   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000020   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000030   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
2014-02-10 00:26:07.419586 | WARN  | 2045:3086292688:test_iLOG3.c:40 | hello WARN buffer[64]
            0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F    0123456789ABCDEF
0x00000000   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000010   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000020   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000030   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
2014-02-10 00:26:07.419627 | ERROR | 2045:3086292688:test_iLOG3.c:41 | hello ERROR buffer[64]
            0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F    0123456789ABCDEF
0x00000000   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000010   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000020   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000030   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
2014-02-10 00:26:07.419686 | FATAL | 2045:3086292688:test_iLOG3.c:42 | hello FATAL buffer[64]
            0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F    0123456789ABCDEF
0x00000000   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000010   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000020   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000030   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
[/code]

配置文件方式使用代码示例: 
[code=c]
#include "LOGSCONF.h"

int test_logsconf( char *program )
{
	LOGS	*gs = NULL ;
	char	buffer[ 64 + 1 ] = "" ;
	long	buflen = sizeof(buffer) - 1 ;
	
	/* 从配置文件中打开日志句柄集合 */
	gs = CreateLogsHandleFromConfigG( "test_logsconf.conf" , NULL ) ;
	printf( "从配置文件中打开日志句柄集合成功\n" );
	
        /* 以不同日志等级写行日志 */
        DEBUGLOGG( "hello DEBUG" ); /* 这行日志因等级不够,被华丽的过滤了 */
        INFOLOGG( "hello INFO" );
        WARNLOGG( "hello WARN" );
        ERRORLOGG( "hello ERROR" );
        FATALLOGG( "hello FATAL" );
        
        /* 以不同日志等级写十六进制块日志 */
        DEBUGHEXLOGG( buffer , buflen , "hello DEBUG buffer[%ld]" , buflen ); /* 又一个被华丽的过滤 */
        INFOHEXLOGG( buffer , buflen , "hello INFO buffer[%ld]" , buflen );
        WARNHEXLOGG( buffer , buflen , "hello WARN buffer[%ld]" , buflen );
        ERRORHEXLOGG( buffer , buflen , "hello ERROR buffer[%ld]" , buflen );
        FATALHEXLOGG( buffer , buflen , "hello FATAL buffer[%ld]" , buflen );
	
	/* 销毁日志句柄 */
	DestroyLogsHandle( gs );
	printf( "销毁日志句柄集合\n" );
	
	return 0;
}

int main( int argc , char *argv[] )
{
	return -test_logsconf( argv[0] );
}
[/code]

配置文件test_logsconf.conf
[code]
id		test_logsconf
output		FILE	test_logsconf.log
level		INFO
styles		DATETIME|LOGLEVEL|PID|TID|SOURCE|FORMAT|NEWLINE
options		CHANGE_TEST
rotate_mode	SIZE
rotate_size	10MB
log_bufsize	1MB	 5MB

id		stdout
output		STDOUT
level		INFO
styles		DATETIME|LOGLEVEL|PID|TID|SOURCE|FORMAT|NEWLINE
[/code]

压测硬件(2007年买的老爷机)
    CPU  : Intel Dual E2160 1.8GHz 1.81GHz
    内存 : 2GB
    硬盘 : 希捷 250GB 7200转
压测软件
    Windows XP SP3 ( VMware 6.0 ( RedHat Enterprise Linux 5.4 分了256MB内存 ) )
压测场景
    10个进程,每个进程开10个线程,每个线程写10000条日志
    每行日志格式大致是”日期 时间 | PID:TID:源代码文件名:源行号 | loglog”
开压!
$ time ./test_press_mpt 10 10 10000 ; wc *.log*
real    0m13.922s
user    0m1.676s
sys     0m12.211s
 124671   997368  9100983 test_press_mpt.log
 148650  1189200 10851450 test_press_mpt.log.1
 143668  1149344 10487764 test_press_mpt.log.2
 143657  1149256 10486961 test_press_mpt.log.3
 150482  1203856 10985186 test_press_mpt.log.4
 143699  1149592 10490027 test_press_mpt.log.5
 145173  1161384 10597629 test_press_mpt.log.6
1000000  8000000 73000000 total

另外,在公司的PC SERVER也跑过,速度提高到real 6s左右



源代码中包含了用户指南和参考手册,里面有更详尽使用说明

《iLOG3日志函数库用户指南.doc》
目录索引
1	前言	5
2	概述	5
3	编译安装	6
3.1	依赖库	6
3.2	用自带makefile或VC6工程文件编译安装	7
3.3	自己手动编译安装	9
4	基本使用	10
4.1	一点点概念	10
4.2	第一个示例	10
4.3	行日志风格方案选配	13
5	高级特性	14
5.1	设置日志选项	14
5.2	日志文件转档	14
5.3	自定义行日志风格	15
5.4	自定义日志输出类型	16
5.5	自定义日志的打开、输出、关闭	16
5.6	线程安全	18
5.6.1	MDC	18
5.6.2	基于线程本地存储的缺省全局日志句柄	19
5.7	一个常用示例	20
6	日志句柄集合层	21
7	配置文件接口层	24
7.1	自带的简单配置文件接口层	24
7.2	配置文件接口展望	26
8	源码分析	27
8.1	第一条线:日志句柄的创建销毁	28
8.2	第二条线:日志句柄的环境设置	29
8.3	第三条线:写日志	37
9	同类日志函数库比较	41
9.1	性能比较	41
9.2	功能比较	45
10	源代码包结构	47
11	如果你喜欢简单日志函数甚于日志函数库

《iLOG3日志函数库参考手册.doc》
目录索引
1	宏	6
1.1	错误码宏	6
1.2	日志输出类型宏	6
1.3	日志等级宏	6
1.4	行日志风格组合宏	7
1.5	日志选项组合宏	8
1.6	日志转档模式宏	8
2	日志句柄函数	9
2.1	管理日志句柄	9
2.1.1	创建日志句柄	9
2.1.2	销毁日志句柄	9
2.2	句柄环境设置	9
2.2.1	设置日志输出	9
2.2.2	设置当前日志过滤等级	10
2.2.3	设置行日志风格方案	10
2.3	高级句柄环境设置	11
2.3.1	设置日志句柄选项	11
2.3.2	设置自定义标签	11
2.3.3	设置日志转档模式	11
2.3.4	设置日志文件转档大小	12
2.3.5	设置日志文件转档大小的压迫系数	12
2.3.6	设置行日志缓冲区大小	12
2.3.7	设置十六进制块日志缓冲区大小	13
2.4	行日志输出	13
2.4.1	带日志等级的写行日志	13
2.4.2	写调试行日志	14
2.4.3	写普通信息行日志	14
2.4.4	写警告行日志	14
2.4.5	写错误行日志	15
2.4.6	写严重错误行日志	15
2.5	十六进制块日志输出	16
2.5.1	带日志等级的写十六进制块日志	16
2.5.2	写十六进制块调试日志	16
2.5.3	写十六进制普通信息块日志	17
2.5.4	写十六进制块警告日志	17
2.5.5	写十六进制块错误日志	18
2.5.6	写十六进制块严重错误日志	18
3	日志句柄集合函数	19
3.1	管理日志句柄集合	19
3.1.1	创建日志句柄集合	19
3.1.2	销毁日志句柄集合	19
3.2	管理日志句柄集合中的日志句柄	19
3.2.1	压入一个日志句柄到日志句柄集合中	19
3.2.2	从一个日志句柄集合中弹出一个指定标识的日志句柄	20
3.2.3	从一个日志句柄集合中查询一个指定标识的日志句柄	20
3.2.4	遍历一个日志句柄集合中所有日志句柄	20
4	配置文件接口层函数	21
4.1	日志句柄	21
4.1.1	从配置文件构建日志句柄	21
4.2	日志句柄集合	21
4.2.1	从配置文件构建日志句柄集合	21
5	配置辅助函数	22
5.1	属性转换函数	22
5.1.1	日志输出类型(字符串转换为整型)	22
5.1.2	日志等级类型(字符串转换为整型)	22
5.1.3	日志等级类型(整型转换为字符串)	22
5.1.4	行日志风格(字符串转换为整型)	23
5.1.5	日志选项(字符串转换为整型)	23
5.1.6	日志转档模式(字符串转换为整型)	23
5.1.7	日志缓冲区(字符串转换为整型)	24
6	简单配置文件属性列表	24

欢迎使用,如果你碰到了使用问题或者有更酷的想法请告诉我,谢谢 ^_^



首页传送门
[url]http://git.oschina.net/calvinwilliams/iLOG3[/url]

技术博客
《开源纯C日志函数库iLOG3快速入门(一、基本使用速览)》
[url]http://my.oschina.net/u/988092/blog/198377[/url]
《开源纯C日志函数库iLOG3快速入门(二、定制远程日志服务)》
[url]http://my.oschina.net/u/988092/blog/199698[/url]
《开源纯C日志函数库iLOG3快速入门(三、日志过滤和转档后压缩)》
[url]http://my.oschina.net/u/988092/blog/200005[/url]
《开源纯C日志函数库iLOG3快速入门(四、使用合适的日志输出函数或宏)》
[url]http://my.oschina.net/u/988092/blog/200013[/url]
《开源纯C日志函数库iLOG3快速入门(五、与随手写的简单写日志函数的比较)》
[url]http://my.oschina.net/u/988092/blog/202240[/url]
《开源纯C日志函数库iLOG3快速入门(六、日志配置文件)》
[url]http://my.oschina.net/u/988092/blog/203743[/url]
《开源纯C日志函数库iLOG3快速入门(七、一份配置应用于多个日志文件)》
[url]http://my.oschina.net/u/988092/blog/265787[/url]
《开源纯C日志函数库iLOG3快速入门(八、如果你喜欢简单日志函数甚于日志函数库)》
[url]http://my.oschina.net/u/988092/blog/293142[/url]
GNU LESSER GENERAL PUBLIC LICENSE Version 2.1, February 1999 Copyright (C) 1991, 1999 Free Software Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. (This is the first released version of the Lesser GPL. It also counts as the successor of the GNU Library Public License, version 2, hence the version number 2.1.) Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public Licenses are intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This license, the Lesser General Public License, applies to some specially designated software packages--typically libraries--of the Free Software Foundation and other authors who decide to use it. You can use it too, but we suggest you first think carefully about whether this license or the ordinary General Public License is the better strategy to use in any particular case, based on the explanations below. When we speak of free software, we are referring to freedom of use, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish); that you receive source code or can get it if you want it; that you can change the software and use pieces of it in new free programs; and that you are informed that you can do these things. To protect your rights, we need to make restrictions that forbid distributors to deny you these rights or to ask you to surrender these rights. These restrictions translate to certain responsibilities for you if you distribute copies of the library or if you modify it. For example, if you distribute copies of the library, whether gratis or for a fee, you must give the recipients all the rights that we gave you. You must make sure that they, too, receive or can get the source code. If you link other code with the library, you must provide complete object files to the recipients, so that they can relink them with the library after making changes to the library and recompiling it. And you must show them these terms so they know their rights. We protect your rights with a two-step method: (1) we copyright the library, and (2) we offer you this license, which gives you legal permission to copy, distribute and/or modify the library. To protect each distributor, we want to make it very clear that there is no warranty for the free library. Also, if the library is modified by someone else and passed on, the recipients should know that what they have is not the original version, so that the original author's reputation will not be affected by problems that might be introduced by others. Finally, software patents pose a constant threat to the existence of any free program. We wish to make sure that a company cannot effectively restrict the users of a free program by obtaining a restrictive license from a patent holder. Therefore, we insist that any patent license obtained for a version of the library must be consistent with the full freedom of use specified in this license. Most GNU software, including some libraries, is covered by the ordinary GNU General Public License. This license, the GNU Lesser General Public License, applies to certain designated libraries, and is quite different from the ordinary General Public License. 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iLOG3是一个轻便易用、概念简单,高性能、多层接口、原生跨平台、(规范使用时)线程安全的遵循LGPLv2.1开源协议的标准c日志函数库。 展开 收起
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