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Merge branch 'master' of https://github.com/gabime/spdlog

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@ -2,11 +2,9 @@
Very fast, header only, C++ logging library. Very fast, header only, C++ logging library.
## Install ## Install
Just copy the files to your build tree and use a C++11 compiler Just copy the files to your build tree and use a C++11 compiler
## Tested on: ## Tested on:
* gcc 4.8.1 and above * gcc 4.8.1 and above
* clang 3.5 * clang 3.5
@ -14,13 +12,14 @@ Just copy the files to your build tree and use a C++11 compiler
* mingw with g++ 4.9.x * mingw with g++ 4.9.x
##Features ##Features
* Very fast - performance is the primary goal (see becnhmarks below). * Very fast - performance is the primary goal (see [becnhmarks](#benchmarks) below).
* Headers only. * Headers only.
* No dependencies. * No dependencies.
* Cross platform - Linux / Windows on 32/64 bits. * Cross platform - Linux / Windows on 32/64 bits.
* **new**! Feature rich [cppfromat call style](http://cppformat.readthedocs.org/en/stable/syntax.html) using the excellent [cppformat](http://cppformat.github.io/) library:```logger.info("Hello {} !!", "world");``` * **new!** Feature rich cppfromat [call style](http://cppformat.readthedocs.org/en/stable/syntax.html) using the excellent [cppformat](http://cppformat.github.io/) library.
* ostream call style ```logger.info() << "Hello << "logger";``` * Example: ```logger.info("Hello {} {:08x}!!", "world", 42);```
* Mixed cppformat/ostream call style ```logger.info("{} + {} = ", 1, 2) << "?";``` * ostream call style: ```logger.info() << "Hello << "logger";```
* **new!** Optional, extremly fast asynchronous mode using lockfree queues, pre allocated memory and deffered formatting.
* [Custom](https://github.com/gabime/spdlog/wiki/Custom-formatting) formatting. * [Custom](https://github.com/gabime/spdlog/wiki/Custom-formatting) formatting.
* Multi/Single threaded loggers. * Multi/Single threaded loggers.
* Various log targets: * Various log targets:
@ -29,7 +28,6 @@ Just copy the files to your build tree and use a C++11 compiler
* Console logging. * Console logging.
* Linux syslog. * Linux syslog.
* Easily extendable with custom log targets (just implement a single function in the [sink](include/spdlog/sinks/sink.h) interface). * Easily extendable with custom log targets (just implement a single function in the [sink](include/spdlog/sinks/sink.h) interface).
* Optional, (extremly fast!), async logging.
* Log levels. * Log levels.
@ -38,7 +36,7 @@ Just copy the files to your build tree and use a C++11 compiler
Below are some [benchmarks](bench) comparing the time needed to log 1,000,000 lines to file under Ubuntu 64 bit, Intel i7-4770 CPU @ 3.40GHz (the best of 3 runs for each logger): Below are some [benchmarks](bench) comparing the time needed to log 1,000,000 lines to file under Ubuntu 64 bit, Intel i7-4770 CPU @ 3.40GHz (the best of 3 runs for each logger):
|threads|boost log|glog|g2log|spdlog|spdlog <sup>async mode</sup>| |threads|boost log|glog|g2log <sup>async mode</sup>|spdlog|spdlog <sup>async mode</sup>|
|-------|:-------:|:-----:|------:|------:|------:| |-------|:-------:|:-----:|------:|------:|------:|
|1|4.779s|1.109s|3.155s|0.319s|0.212s |1|4.779s|1.109s|3.155s|0.319s|0.212s
|10|15.151ss|3.546s|3.500s|0.641s|0.199s| |10|15.151ss|3.546s|3.500s|0.641s|0.199s|
@ -51,23 +49,19 @@ Below are some [benchmarks](bench) comparing the time needed to log 1,000,000 li
int main(int, char* []) int main(int, char* [])
{ {
namespace spd = spdlog; namespace spd = spdlog;
try try
{ {
std::string filename = "logs/spdlog_example"; std::string filename = "logs/spdlog_example";
// Set log level to all loggers to DEBUG and above // Set log level to all loggers to DEBUG and above
spd::set_level(spd::level::DEBUG); spd::set_level(spd::level::DEBUG);
//Create console, multithreaded logger //Create console, multithreaded logger
auto console = spd::stdout_logger_mt("console"); auto console = spd::stdout_logger_mt("console");
console->info("Welcome to spdlog!") ; console->info("Welcome to spdlog!") ;
console->info("An info message example {}..", 1); console->info("An info message example {}..", 1);
console->info() << "Streams are supported too " << 1; console->info() << "Streams are supported too " << 1;
console->info("Easy padding in numbers like {:08d}", 12); console->info("Easy padding in numbers like {:08d}", 12);
console->info("Support for int: {0:d}; hex: {0:x}; oct: {0:o}; bin: {0:b}", 42); console->info("Support for int: {0:d}; hex: {0:x}; oct: {0:o}; bin: {0:b}", 42);
console->info("Support for floats {:03.2f}", 1.23456); console->info("Support for floats {:03.2f}", 1.23456);
@ -77,11 +71,14 @@ int main(int, char* [])
console->info("{:>30}", "right aligned"); console->info("{:>30}", "right aligned");
console->info("{:^30}", "centered"); console->info("{:^30}", "centered");
//See cppformat syntax documation here:
//http://cppformat.readthedocs.org/en/stable/syntax.html
//Create a file rotating logger with 5mb size max and 3 rotated files //Create a file rotating logger with 5mb size max and 3 rotated files
auto file_logger = spd::rotating_logger_mt("file_logger", filename, 1024 * 1024 * 5, 3); auto file_logger = spd::rotating_logger_mt("file_logger", filename, 1024 * 1024 * 5, 3);
file_logger->info("Log file message number", 1); file_logger->info("Log file message number", 1);
spd::set_pattern("*** [%H:%M:%S %z] [thread %t] %v ***"); spd::set_pattern("*** [%H:%M:%S %z] [thread %t] %v ***");
file_logger->info("This is another message with custom format"); file_logger->info("This is another message with custom format");
@ -93,8 +90,8 @@ int main(int, char* [])
// Asynchronous logging is easy.. // Asynchronous logging is easy..
// Just call spdlog::set_async_mode(max_q_size) and all created loggers from now on will be asynchronous.. // Just call spdlog::set_async_mode(max_q_size) and all created loggers from now on will be asynchronous..
// //
size_t max_q_size = 1048576; size_t q_size = 1048576; //queue size must be power of 2
spdlog::set_async_mode(max_q_size); spdlog::set_async_mode(q_size);
auto async_file= spd::daily_logger_st("async_file_logger", "logs/async_log.txt"); auto async_file= spd::daily_logger_st("async_file_logger", "logs/async_log.txt");
async_file->info() << "This is async log.." << "Should be very fast!"; async_file->info() << "This is async log.." << "Should be very fast!";
@ -110,7 +107,6 @@ int main(int, char* [])
{ {
std::cout << "Log failed: " << ex.what() << std::endl; std::cout << "Log failed: " << ex.what() << std::endl;
} }
return 0;
} }
``` ```