hedzr/ticker-cxx

c++17 timing and trigger abilities

ticker-cxx

ticker-cxx is a C++17 library to provide a set of timing ticker functions, it schedules to trigger your customized tasks.

WIP.

Features

These template classes are provided for scheduling your works mainly:

• timer
• ticker
• alarm

The typical time and period representations, such as 1us, from std::literals::chrono_literals, are valid for the timer setting.

The recommended shortest gap is 1us.

To support ns/nanoseconds level as interval gap, you should tune and optimize the whole userland codes and this library. Or, use hardware clock device and driver.

This library is originally designed for the most of scenes of GTD, and long-period backends.

History

• v0.2.7: rename the cor classes to avoid c++ warnings: timer -> timer_t, ticker -> ticker_t, alarm -> alarm_t
• v0.2.5: upgrade cmake scripts for better styles, compatibilities, and structures
• v0.2.3: little improvements for building compatibilities
• v0.2.1: first public release
• ? : the plan started

Guide

Uses timer

the one-time timer after a duration (for instance 1us):

void test_timer() {
    using namespace std::literals::chrono_literals;

    ticker::pool::conditional_wait_for_int count{1};
    auto t = ticker::timer_t<>::get();
    t->after(1us)
            .on([&count] {
                auto now = ticker::chrono::now();
                ticker::pool::cw_setter cws(count);
                printf("  - after [%02d]: %s\n", count.val(), ticker::chrono::format_time_point(now).c_str());
            })
            .build();

    printf("count.wait()\n");
    count.wait_for(); // wait_for(2s) or wait()
    // t.clear();
    printf("end of %s\n", __FUNCTION_NAME__);
}

at(), in() are the synonyms of after(...).

Uses ticker

runs a ticker after 1us, and stop it once 16 times tick repeated:

void test_timer() {
    using namespace std::literals::chrono_literals;

    ticker::pool::conditional_wait_for_int count{16};
    auto t = ticker::ticker_t<>::get();
    t->every(1us)
            .on([&count]() {
                // auto now = ticker::chrono::now();
                ticker::pool::cw_setter cws(count);
                printf("  - every [%02d]: %s\n", count.val(), ticker::chrono::format_time_point().c_str());
            })
            .build();

    count.wait(); // wait_for(2s) or wait()
}

interval() could be used instead of every().

alarm

class ticker::alarm provides the periodical job running mechanism. It could be used in a GTD app perfectly.

A simple demo is:

void test_alarm() {
    using namespace std::literals::chrono_literals;
    
    ticker::pool::conditional_wait_for_int count2{4};
    ticker::alarm_t<>::super::get()
            ->every_month(3)
            .on([&count2] {
                auto now = ticker::chrono::now();
                ticker::pool::cw_setter cws(count2);
                printf("  - alarm [%02d]: %s\n", count2.val(), ticker::chrono::format_time_point(now).c_str());
            })
            .build();
    printf("end of %s\n", __FUNCTION_NAME__);
}

ticker::alarm::loop_for(anchors, day_offset, how_many_times, repeat_count) enables the full functions with Anchors enumerated variables:

    enum class anchors {
        Nothing,

        Month,       // 'offset' (1..31, -1..-31) day every month; with 'ordinal' times
        TwoMonth,    // 'offset' day every two month
        Quarter,     // 'offset' quarter day every quarter
        FourMonth,   //
        FiveMonth,   //
        SixMonth,    // 'offset' day every half a year
        SevenMonth,  //
        EightMonth,  // eight
        NineMonth,   //
        TenMonth,    // ten
        ElevenMonth, //
        Year,        // 'offset' day every year, this month; with 'ordinal' times

        FirstThirdOfMonth,  // 'offset' (0..9, -1..-10) day 在每一个上旬; // with 'ordinal' times
        MiddleThirdOfMonth, // 'offset' (0..9, -1..-10) day 在每一个中旬; // with 'ordinal' times
        LastThirdOfMonth,   // 'offset' (0..9, -1..-10) day 在每一个下旬; // with 'ordinal' times

        DayInYear,   // 'offset' (0-365) day every one year
        WeekInMonth, // 'offset' (0..5)  week every one month
        WeekInYear,  // 'offset' (0..51) week every one year
        Week,        // 'offset' (0..6)  day every one week

        // ...
    };

Build Options

Build with CMake

1. gcc 10+: passed
2. clang 12+: passed
3. msvc build tool 16.7.2, 16.8.5 (VS2019 or Build Tool) passed

ninja is optional for faster building.

# generate the building config
cmake -B build/
# build the whole project (with unittest too)
cmake --build build/

# configure with ninja
cmake -S . -B build/ -G Ninja

# CTest
cmake -E chdir build ctest

# install
cmake --install build/
# Or:cmake --build build/ --target install
#
# Sometimes sudo it:
#   sudo cmake --build build/ --target install
# Or:
#   cmake --install build/ --prefix ./install --strip
#   sudo cp -R ./install/include/* /usr/local/include/
#   sudo cp -R ./install/lib/cmake/fsm_cxx /usr/local/lib/cmake/

Other CMake Options

1. TICKER_CXX_BUILD_TESTS_EXAMPLES=OFF
2. TICKER_CXX_BUILD_DOCS=OFF
3. ...

CMake Options with C++ Macros

1. TICKER_CXX_ENABLE_ASSERTIONS
2. TICKER_CXX_ENABLE_PRECONDITION_CHECKS=ON
3. TICKER_CXX_ENABLE_THREAD_POOL_READY_SIGNAL (always be 1)
4. TICKER_CXX_TEST_THREAD_POOL_DBGOUT
5. TICKER_CXX_UNIT_TEST
6. USE_DEBUG, USE_DEBUG_MALLOC
7. ...

Macros after include ticker-def.hh

1. _DEBUG, DEBUG
2. ...

Thanks to JODL

Thanks to JetBrains for donating product licenses to help develop ticker-cxx

LICENSE

Apache 2.0