Log4z is an open source C++ lightweight & cross platform log library. It provides in a C++ application log and trace debug function for 7*24h service program. Support 64/32 of windows/linux/mac/android/iOS. Log4z是一款开源的轻量级高性能的跨平台日志库 主要针对7*24小时服务器程序的日志输出与跟踪调试, 支持64/32位的windows/linux/mac/android/iOS等操作系统. 

1. MIT open source license,very liberal. MIT开源授权 授权的限制非常小. 2. Cross Platform Linux & Windows & mac, Lightweight only one cpp sourse file one header file. 跨平台支持linux & windows & mac, 轻量级 只有一个头文件和一个cpp文件. 3. 不需要关心创建和销毁等问题 全部自动化. 4. Multi-Logger Output, Rolling File, Priority Filter, Thread Safe. 支持多日志分流,滚动日志记录, 优先级过滤, 多线程安全. 5. Screen Display Log with Different Color. 屏显日志彩色输出. 6. Support format-style and stream-style write log. 支持格式化形式和流形式输入日志. 7. Support configure from file and hot update, or can direct fast work without any config. 可通过配置文件配置并进行配置热更新,也可以不做任何配置直接快速使用. 8. High-performance, 800k lines/sec complex log input/output, 2M lines/sec single string input/output. 非常高的吞吐和序列化性能, 针对单线程和多线程下的指令级调优. 80万/sec的复杂类型的日志写入速度,和200万/sec的单一字符串写入速度. 

E:\GITHUB\LOG4Z\PROJECT\BIN │──advanced_test.exe │──config.cfg │──fast_test.exe │──stress_test.exe │ ├─log │──│──advanced_test_2013100921_003852_000.log │──│──advanced_test_2013101313_005920_000.log │──│──fast_test_2013100921_003855_000.log │──│ │──└─2013_10 │─────│────Dynamic_2013100921_003852_000.log │ └─Stress ───│────NetWork_2013101313_007196_000.log ───│────NetWork_2013101313_007196_001.log ───│────NetWork_2013101313_007196_002.log 

2015-12-15 14:36:43.453 LOG_ALARM ----------------- log4z thread started! ---------------------------- 2015-12-15 14:36:43.453 LOG_ALARM logger id=0 key=Main name=a.out path=./log/ level=1 display=1 2015-12-15 14:36:43.503 LOG_DEBUG stream input *** LOGD LOGD LOGD LOGD *** (main.cpp):10 2015-12-15 14:36:43.503 LOG_INFO stream input *** LOGI LOGI LOGI LOGI *** (main.cpp):11 2015-12-15 14:36:43.503 LOG_WARN stream input *** LOGW LOGW LOGW LOGW *** (main.cpp):12 2015-12-15 14:36:43.503 LOG_ERROR stream input *** LOGE LOGE LOGE LOGE *** (main.cpp):13 2015-12-15 14:36:43.503 LOG_ALARM stream input *** LOGA LOGA LOGA LOGA *** (main.cpp):14 2015-12-15 14:36:43.503 LOG_FATAL stream input *** LOGF LOGF LOGF LOGF *** (main.cpp):15 2015-12-15 14:36:43.503 LOG_DEBUG format input *** LOGFMTD *** 123456 *** (main.cpp):20 2015-12-15 14:36:43.503 LOG_INFO format input *** LOGFMTI *** 123456 *** (main.cpp):21 2015-12-15 14:36:43.503 LOG_WARN format input *** LOGFMTW *** 123456 *** (main.cpp):22 2015-12-15 14:36:43.503 LOG_ERROR format input *** LOGFMTE *** 123456 *** (main.cpp):23 2015-12-15 14:36:43.503 LOG_ALARM format input *** LOGFMTA *** 123456 *** (main.cpp):24 2015-12-15 14:36:43.503 LOG_FATAL format input *** LOGFMTF *** 123456 *** (main.cpp):25 2015-12-15 14:36:43.503 LOG_ALARM main quit ... (main.cpp):27 

 #include "log4z.h" using namespace zsummer::log4z; int main(int argc, char *argv[]) { //start log4z ILog4zManager::getRef().start(); //begin test stream log input.... LOGT("stream input *** " << "LOGT LOGT LOGT LOGT" << " *** "); LOGD("stream input *** " << "LOGD LOGD LOGD LOGD" << " *** "); LOGI("stream input *** " << "LOGI LOGI LOGI LOGI" << " *** "); LOGW("stream input *** " << "LOGW LOGW LOGW LOGW" << " *** "); LOGE("stream input *** " << "LOGE LOGE LOGE LOGE" << " *** "); LOGA("stream input *** " << "LOGA LOGA LOGA LOGA" << " *** "); LOGF("stream input *** " << "LOGF LOGF LOGF LOGF" << " *** "); // cannot support VC6 or VS2003 //begin test format log input.... LOGFMTT("format input *** %s *** %d ***", "LOGFMTT", 123456); LOGFMTD("format input *** %s *** %d ***", "LOGFMTD", 123456); LOGFMTI("format input *** %s *** %d ***", "LOGFMTI", 123456); LOGFMTW("format input *** %s *** %d ***", "LOGFMTW", 123456); LOGFMTE("format input *** %s *** %d ***", "LOGFMTE", 123456); LOGFMTA("format input *** %s *** %d ***", "LOGFMTA", 123456); LOGFMTF("format input *** %s *** %d ***", "LOGFMTF", 123456); LOGA("main quit ..."); return 0; } 

Open and compile log4z/vc2005/log4z.vcproj 

cd log4z/g++ cmake . make