Full Code of 0xmalloc/c-log for AI

Repository: 0xmalloc/c-log
Branch: master
Commit: 29349a67d5ad
Files: 14
Total size: 24.1 KB

Directory structure:
gitextract_2z6_6gxs/

├── LICENSE
├── README.md
├── src/
│   ├── log.c
│   ├── log.h
│   └── macro_define.h
├── test/
│   ├── bench_test
│   ├── bench_test.c
│   ├── build.sh
│   ├── test.c
│   ├── test_log
│   ├── test_pthread_log
│   ├── thread_test.c
│   └── ultimate_test.c
└── 开源c-log日志库

================================================
FILE CONTENTS
================================================

================================================
FILE: LICENSE
================================================
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================================================
FILE: README.md
================================================
## C-LOG
[![Release Version](https://img.shields.io/badge/release-1.0.0-red.svg)](https://github.com/0xmalloc/c-log/releases) 

## What is c-log
a fast ,stable and thread-safe log lib(logger) for C/C++ language

## How to Use 
you can use  "sh build.sh" to build the testing application and also i suggest you to `run "./bench_test" (single_thread)to see the performance`

you can use this log module by the follow  guiding:
```cpp
    log_init(LL_TRACE, "mysql", "./log/");
	LOG_NOTICE("%s [time:%d]", "test calling log", time(NULL));
	LOG_DEBUG("debug msg,only write to log when the loglevel bigger than or equal to debug [time:%d]", time(NULL));
	LOG_WARN("warnning msg will be writing to the error files [time:%d]", time(NULL));
	LOG_ERROR("you also can change  number of output files by rewrite the macro_define.h");
```
and also you don't need to call close befor your application exit
if you insist to calling close,please use WARN_W.log_close() INFO_W.log_close() and so so.

this module also provide some convenient macro, you can use it in the following scene
```cpp
    int function()
	{
		int ret;
		if()
		{
			ret = function_call();
			MACRO_RET(ret != 0, -1);
			MACRO_WARN(ret != 0, "function call failed  [ret:%d]", ret);
			MACRO_WARN_RET(ret != 0, -1, "function call failed  [ret:%d]", ret)
			
		}
	}
```
The performance of this log module is really depend on how fast your disk is.
here is test result:

    case 1
        Record Size: 280kb
    	Cost Time: 42 seconds
    	Data File Size: 20GB
    	yes. we write 20GB file in 102s,that's means we write 200MB per second.and
    	also this is the limitation of SATA.

    case 2 
        Record Size: 56byte
    	Record Write per Senconds:200,000
    	yes,in it's general useage,you can gain high qps from this log module

what will be the next?


## About Author

```javascript
  var 0xmalloc = {
    nickName  : "zealot yin",
    email : '0xmalloc@gmail.com',
    site : "http://www.cnblogs.com/Creator/"
    weibo : "http://www.weibo.com/zealotyin"
  }
```


================================================
FILE: src/log.c
================================================
#include "log.h"
#include <sys/file.h>
#include <stdarg.h>
#include <time.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/stat.h>

Log_Writer WARN_W;
Log_Writer INFO_W;
__thread char Log_Writer::m_buffer[_LOG_BUFFSIZE];

bool log_init(LogLevel l, const char* p_modulename, const char* p_logdir)
{
	//如果路径存在文件夹，则判断是否存在
	if (access (p_logdir, 0) == -1)
	{
		if (mkdir (p_logdir, S_IREAD | S_IWRITE ) < 0)
			fprintf(stderr, "create folder failed\n");
	}
	char _location_str[_LOG_PATH_LEN];
	snprintf(_location_str, _LOG_PATH_LEN, "%s/%s.access", p_logdir, p_modulename);	
	INFO_W.loginit(l, _location_str);
	snprintf(_location_str, _LOG_PATH_LEN, "%s/%s.error", p_logdir, p_modulename);
	//warning级别以上日志去WARN_W  去向由宏决定的 请见macro_define.h
	if(l > LL_WARNING)
		WARN_W.loginit(l, _location_str);
	else
		WARN_W.loginit(LL_WARNING, _location_str);
	return true;
}

const char* Log_Writer::logLevelToString(LogLevel l) {
        switch ( l ) {
			case LL_DEBUG:
				return "DEBUG";
			case LL_TRACE:
				return "TRACE";
			case LL_NOTICE:
				return "NOTICE";
			case LL_WARNING:
				return "WARN" ;
			case LL_ERROR:
				return "ERROR";
			default:
				return "UNKNOWN";
        }
}
	
bool Log_Writer::checklevel(LogLevel l)
{
	if(l >= m_system_level)
		return true;
	else
		return false;
}

bool Log_Writer::loginit(LogLevel l, const  char *filelocation, bool append, bool issync)
{
	MACRO_RET(NULL != fp, false);
    m_system_level = l;
    m_isappend = append; 
    m_issync = issync; 
	if(strlen(filelocation) >= (sizeof(m_filelocation) -1))
	{
		fprintf(stderr, "the path of log file is too long:%d limit:%d\n", strlen(filelocation), sizeof(m_filelocation) -1);
		exit(0);
	}
	//本地存储filelocation  以防止在栈上的非法调用调用
	strncpy(m_filelocation, filelocation, sizeof(m_filelocation));
	m_filelocation[sizeof(m_filelocation) -1] = '\0';
	
	if('\0' == m_filelocation[0])
	{
		fp = stdout;
		fprintf(stderr, "now all the running-information are going to put to stderr\n");
		return true;
	}
	
	fp = fopen(m_filelocation, append ? "a":"w");
	if(fp == NULL)
	{
		fprintf(stderr, "cannot open log file,file location is %s\n", m_filelocation);
		exit(0);
	}
	//setvbuf (fp, io_cached_buf, _IOLBF, sizeof(io_cached_buf)); //buf set _IONBF  _IOLBF  _IOFBF
	setvbuf (fp,  (char *)NULL, _IOLBF, 0);
	fprintf(stderr, "now all the running-information are going to the file %s\n", m_filelocation);
	return true;
}

int Log_Writer::premakestr(char* m_buffer, LogLevel l)
{
    time_t now;
	now = time(&now);;
	struct tm vtm; 
    localtime_r(&now, &vtm);
    return snprintf(m_buffer, _LOG_BUFFSIZE, "%s: %02d-%02d %02d:%02d:%02d ", logLevelToString(l),
            vtm.tm_mon + 1, vtm.tm_mday, vtm.tm_hour, vtm.tm_min, vtm.tm_sec);
}

bool Log_Writer::log(LogLevel l, char* logformat,...)
{
	MACRO_RET(!checklevel(l), false);
	int _size;
	int prestrlen = 0;
	
	char * star = m_buffer;
	prestrlen = premakestr(star, l);
	star += prestrlen;
	
	va_list args;
	va_start(args, logformat);
	_size = vsnprintf(star, _LOG_BUFFSIZE - prestrlen, logformat, args);
	va_end(args);
	
	if(NULL == fp)
		fprintf(stderr, "%s", m_buffer);
	else
		_write(m_buffer, prestrlen + _size);
	return true;
}

bool Log_Writer::_write(char *_pbuffer, int len)
{
	if(0 != access(m_filelocation, W_OK))
	{	
		pthread_mutex_lock(&m_mutex);
		//锁内校验 access 看是否在等待锁过程中被其他线程loginit了  避免多线程多次close 和init
		if(0 != access(m_filelocation, W_OK))
		{
			logclose();
			loginit(m_system_level, m_filelocation, m_isappend, m_issync);
		}
		pthread_mutex_unlock(&m_mutex);
	}

	if(1 == fwrite(_pbuffer, len, 1, fp)) //only write 1 item
	{
		if(m_issync)
          	fflush(fp);
		*_pbuffer='\0';
    }
    else 
	{
        int x = errno;
	    fprintf(stderr, "Failed to write to logfile. errno:%s    message:%s", strerror(x), _pbuffer);
	    return false;
	}
	return true;
}

LogLevel Log_Writer::get_level()
{
	return m_system_level; 
}

bool Log_Writer::logclose()
{
	if(fp == NULL)
		return false;
	fflush(fp);
	fclose(fp);
	fp = NULL;
	return true;
}





================================================
FILE: src/log.h
================================================
#ifndef   _MACRO_LogModule
#define   _MACRO_LogModule
#include <stdio.h>
#include <pthread.h>
#include "macro_define.h"

/* ÿ̵߳buffer size*/
#define   _LOG_BUFFSIZE  1024*1024*4
/* ǰ̵ Stream IO buffer size*/
#define   _SYS_BUFFSIZE  1024*1024*8
/* log ļַ·󳤶*/
#define	  _LOG_PATH_LEN  250
/* ־Ӧģ*/
#define   _LOG_MODULE_LEN 32

typedef  enum LogLevel {  
	LL_DEBUG = 1,
	LL_TRACE = 2,
	LL_NOTICE = 3, 
	LL_WARNING = 4, 
	LL_ERROR = 5,
}LogLevel;

/**
*	Log_Writer  ־
*/
class Log_Writer
{
	public:
		Log_Writer()
		{
			m_system_level = LL_NOTICE;
			//fp = stderr;
			fp = NULL;
			m_issync = false;
			m_isappend = true;
			m_filelocation[0] ='\0'; 
			pthread_mutex_init(&m_mutex, NULL);
		}
		~Log_Writer(){
			logclose();
		}
		bool loginit(LogLevel l, const  char *filelocation, bool append = true, bool issync = false);
		bool log(LogLevel l,char *logformat,...);
		LogLevel get_level();
		bool logclose();
	private:
		const char* logLevelToString(LogLevel l);
		bool checklevel(LogLevel l);
		int premakestr(char* m_buffer, LogLevel l);
		bool _write(char *_pbuffer, int len);
	private:
		enum LogLevel m_system_level;
		FILE* fp;
		bool m_issync;
		bool m_isappend;
		char m_filelocation[_LOG_PATH_LEN];
		pthread_mutex_t m_mutex;
		static __thread char m_buffer[_LOG_BUFFSIZE];
		//The __thread specifier may be applied to any global, file-scoped static, function-scoped static, 
		//or static data member of a class. It may not be applied to block-scoped automatic or non-static data member
		//in the log  scence,It's safe!!!!
		//һԱ֮˳õ__threadԴleak,ͬʱҲõĶLog_Writerţ
		//Ϊһ߳ͬһʱֻһLog_Writerڸɻ֮m_bufferreset
		//Լһ߳ûLog_Write(Ϊһ߳ڵֻ̬д) Ҳ̰߳ȫģ
};

extern Log_Writer WARN_W;
extern Log_Writer INFO_W;

/**
 * LogLevel ־
 * p_modulename ģ mysql
 * p_logdir  ־Ŀ¼
 * */
bool log_init(LogLevel l, const char* p_modulename, const char* p_logdir);
#endif


================================================
FILE: src/macro_define.h
================================================
#ifndef  _MACRO_DEFINE
#define  _MACRO_DEFINE
//============basic===================

#define LOG_ERROR(log_fmt, log_arg...) \
    do{ \
        WARN_W.log(LL_ERROR,   "[%s:%d][%s] " log_fmt "\n", \
                     __FILE__, __LINE__, __FUNCTION__, ##log_arg); \
    } while (0) 

#define LOG_WARN(log_fmt, log_arg...) \
    do{ \
        WARN_W.log(LL_WARNING,   "[%s:%d][%s] " log_fmt "\n", \
                     __FILE__, __LINE__, __FUNCTION__, ##log_arg); \
    } while (0) 

#define LOG_NOTICE(log_fmt, log_arg...) \
    do{ \
        INFO_W.log(LL_NOTICE,   "[%s:%d][%s] " log_fmt "\n", \
                     __FILE__, __LINE__, __FUNCTION__, ##log_arg); \
    } while (0) 

#define LOG_TRACE(log_fmt, log_arg...) \
    do{ \
        INFO_W.log(LL_TRACE,   "[%s:%d][%s] " log_fmt "\n", \
                     __FILE__, __LINE__, __FUNCTION__, ##log_arg); \
    } while (0) 

#define LOG_DEBUG(log_fmt, log_arg...) \
    do{ \
        INFO_W.log(LL_DEBUG,   "[%s:%d][%s] " log_fmt "\n", \
                     __FILE__, __LINE__, __FUNCTION__, ##log_arg); \
    } while (0) 

//============extend===================
#define MACRO_RET(condition, return_val) {\
    if (condition) {\
        return return_val;\
    }\
}

#define MACRO_WARN(condition, log_fmt, log_arg...) {\
    if (condition) {\
        LOG_WARN( log_fmt, ##log_arg);\
    }\
}

#define MACRO_WARN_RET(condition, return_val, log_fmt, log_arg...) {\
    if ((condition)) {\
        LOG_WARN( log_fmt, ##log_arg);\
		return return_val;\
    }\
}
#endif


================================================
FILE: test/bench_test.c
================================================
#include "log.h"
#include <string.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>

/*
 * 单线程压力测试
 * */
int common_test()
{
	LOG_DEBUG("testing write log befor log_init: %s", "haha");
}

void test01()
{
    //init  log
	//log_init(LL_TRACE, "mysql", "./log");
	log_init(LL_TRACE, "bench", "./");
    
	int i;
	char _strbuf[1024*1024*4];

	char *_log_str = "You got something wrong here";	
	for(i = 0; i < 10000; i++)
	{
		strncat(_strbuf, _log_str, strlen(_log_str));
	}
	printf("Log size of each log:%d", strlen(_strbuf));	
	for(i = 0; i < 1000000000; i++)
	{
		LOG_NOTICE("%s [value:%d]", _strbuf, i);
    }
}

int main()
{
    test01();
}


================================================
FILE: test/build.sh
================================================
#!/bin/bash
SRCPATH="../src/"
rm -f test_log test_pthread_log ultimate_test
g++ -o test_log  "$SRCPATH"log.c    test.c  -lpthread  -I "$SRCPATH"
g++ -o bench_test  "$SRCPATH"log.c    bench_test.c  -lpthread  -I "$SRCPATH"
g++ -o test_pthread_log  "$SRCPATH"log.c    thread_test.c -lpthread -I "$SRCPATH"
g++ -o ultimate_test  "$SRCPATH"log.c    ultimate_test.c  -I "$SRCPATH"

if ls *.access >/dev/null 2>/dev/null  
then
	rm *.access
fi
if ls *.error >/dev/null 2>/dev/null  
then 
	rm *.error
fi


================================================
FILE: test/test.c
================================================
#include "log.h"
#include <string.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
/*
 * 基本功能测试
 */
int common_test()
{
	LOG_DEBUG("testing write log befor log_init: %s", "haha");
}

void test01()
{
	//测试init 之前调用log_wwarn的结果
	common_test();
    //init  log
	//log_init(LL_TRACE, "mysql", "./log");
	log_init(LL_DEBUG, "mysql", "./");
    
	int i;
	char _strbuf[200*1024];

	char *_log_str = "You got something wrong here";	
	for(i = 0; i < 1; i++)
	{
		strncat(_strbuf, _log_str, strlen(_log_str));
	}
	common_test(); 
	
	for(i = 0; i < 10; i++)
	{
		//sleep(1);
		if(0 == (i% 5))
			LOG_NOTICE("%s [value:%d] [xx:%d]", _strbuf, i, 10);
		else if(1 == i % 5)
			LOG_DEBUG("%s [value:%d]", _strbuf, i); 
		else if (2 == i % 5)
			LOG_TRACE("%s [value:%d]", _strbuf, i);
		else if (3 == i % 5)
			LOG_WARN("%s [value:%d]", _strbuf, i);
		else 
			LOG_ERROR("%s [value:%d]", _strbuf, i);
    }
}

int main()
{
    test01();
		
}


================================================
FILE: test/thread_test.c
================================================
#include "log.h"
#include <string.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <pthread.h>
/*
 * 测试是否多线程安全
 * */
bool quit = false;
void signal_handler(int sig){
	switch(sig){
		case SIGTERM:
		case SIGINT:
			quit = true;
			break;
	}
	printf("bingo sig\n");
}

void* test01(void *)
{
    int i;
	char _strbuf[200*1024];

	char *_log_str = "You got something wrong here";	
	for(i = 0; i < 1; i++)
	{
		strncat(_strbuf, _log_str, strlen(_log_str));
	}

    for(i=0;i<1000000000;i++)
	{
		//测试日志是否立即写入到文件
		sleep(1);
		if(0 == (i% 5)) 
            LOG_NOTICE("%s [value:%d]", _strbuf, i);
        else if(1 == i % 5)
            LOG_DEBUG("%s [value:%d]", _strbuf, i); 
        else if (2 == i % 5)
            LOG_TRACE("%s [value:%d]", _strbuf, i);
        else if (3 == i % 5)
            LOG_WARN("%s [value:%d]", _strbuf, i);
        else    
            LOG_ERROR("%s [value:%d]", _strbuf, i);	
		if(quit)
			break;
    }
}

int main()
{
    signal(SIGPIPE, SIG_IGN);
    signal(SIGINT, signal_handler);
    signal(SIGTERM, signal_handler);
	log_init(LL_TRACE, "session", "./");
	
	pthread_t pid[20];
	int i = 0;
	int ret = 0;
	for(; i < 20; i++)
	{
		ret = pthread_create(&pid[i], NULL, test01, NULL);
		MACRO_WARN_RET(0 != ret, -1, "pthread_create error[ret:%d]", ret)
	}
	for(i = 0; i < 20; i++)
	{
		pthread_join(pid[i], NULL);
	}
		
}


================================================
FILE: test/ultimate_test.c
================================================
#include "log.h"
#include <unistd.h>
#include <stdlib.h>
#include <signal.h>

void sig_alarm (int signo)
{
	exit (0);
}
int main()
{
	alarm (10);
	if (signal (SIGALRM, sig_alarm) == SIG_ERR)
	{
		printf("%s\n", "signal error");
	}
	log_init (LL_DEBUG, "ultimate_test", "./");
	while (1)
	{
		LOG_TRACE("This is a test message!!!");
	}
	return 0;
}


================================================
FILE: 开源c-log日志库
================================================
开源的c-log日志库，支持c/c++