test/smoke_timelog.cpp

//#define TURN_OFF_LOGGER_
//#define LOGGER_USE_LOCAL_TIME_ false
#include <bux/Logger.h>     // DEF_LOGGER_FILES(), DEF_FALLBACK_LOGGER_FILES()
#include <bux/FileLog.h>    // bux::C_PathFmtLogSnap
#include <chrono>           // std::chrono::system_clock
#include <random>           // std::mt19937
#include <stdlib.h>         // strtoul()
#include <thread>           // std::this_thread::sleep_for()
 
#define SET_SIZE_LIMIT_
#ifndef SET_SIZE_LIMIT_
DEF_LOGGER_FILES("timelog/{:%y%m%d_%H%M}.log")
#else
constinit const std::array fallbacks{
    "timelog/{:%y%m%d-%H}.log",
    "timelog/{:%y%m%d-%H-%M}.log",
    "timelog/{:%y%m%d-%H-%M-%S}.log"
};
DEF_FALLBACK_LOGGER_FILES(65536, fallbacks)
#endif
 
thread_local std::mt19937 g_rng{std::random_device{"/dev/urandom"}()};
 
static const struct { bux::E_LogLevel ll; const char *msg; } LOG_SRC[] = {
    {LL_FATAL,   "Hello fatal"},
    {LL_ERROR,   "Hello error"},
    {LL_WARNING, "Hello warning"},
    {LL_INFO,    "Hello info"},
    {LL_VERBOSE, "Hello verbose"},
};
 
int main(int argc, const char *argv[])
{
#ifndef TURN_OFF_LOGGER_
    if (bux::C_UseLog u{bux::logger()})
        *u <<std::boolalpha <<"LOGGER_USE_LOCAL_TIME_: " <<LOGGER_USE_LOCAL_TIME_ <<"\n";
#endif
    if (argc <= 1)
    {
        for (auto i: LOG_SRC)
            LOG(i.ll, "{}", i.msg);
    }
    else
    {
        using C_MyClock = std::chrono::system_clock;
        const auto deadline = C_MyClock::now() + std::chrono::seconds(strtoul(argv[1],nullptr,0));
        while (C_MyClock::now() < deadline)
        {
            const auto &i = LOG_SRC[std::uniform_int_distribution<size_t>{0,std::size(LOG_SRC)-1}(g_rng)];
            LOG(i.ll, "{}", i.msg);
            std::this_thread::sleep_for(
#ifdef SET_SIZE_LIMIT_
                std::chrono::milliseconds(100)
#else
                std::chrono::seconds(1)
#endif
            );
        }
    }
}