循环日志文件

//将github上的spdlog库下载，include头文件包含到该项目中
#include "spdlog/spdlog.h"
#include "spdlog/sinks/stdout_color_sinks.h"
#include "spdlog/sinks/basic_file_sink.h"
#include "spdlog/sinks/rotating_file_sink.h"
#include "spdlog/async.h"

void rotating_example() {
	// Create a file rotating logger with 5mb size max and 3 rotated files
	auto max_size = 1048576 * 5;
	auto max_files = 5;

	auto rotating_file_sink = std::make_shared<spdlog::sinks::rotating_file_sink_mt>("logs/rotating1.txt", max_size, max_files);
    //多个日志器共享sink
	auto logger = std::make_shared<spdlog::logger>("some_logger_name", rotating_file_sink);
	auto logger1 = std::make_shared<spdlog::logger>("some_logger_name1", rotating_file_sink);
	auto logger2 = std::make_shared<spdlog::logger>("some_logger_name2", rotating_file_sink);
	//注册日志器
	spdlog::register_logger(logger2);
	
	std::string test1 = u8"test";
	while (1) {
		// 注册后，其它代码可以根据名称获得日志器
		auto loggertest = spdlog::get("some_logger_name2");
		if (!loggertest)
		{
			std::cout << 1 << std::endl;
		}
		logger->info(test1);
		logger1->info(test1);
		logger2->info(test1);
	}

}

int main()
{
	rotating_example();
    std::cout << "Hello World!\n";
}