forked from Imagelibrary/rtems
111 lines
2.9 KiB
C++
111 lines
2.9 KiB
C++
/* SPDX-License-Identifier: BSD-2-Clause */
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/*
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* Copyright (C) 2020 Chris Johns (http://contemporary.software)
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <atomic>
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#include <chrono>
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#include <iostream>
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#include <mutex>
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#include <rtems/thread.hpp>
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class ticker
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{
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public:
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ticker();
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void start(const size_t life_time);
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bool finished();
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size_t seconds();
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private:
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void timer(const size_t life_time);
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rtems::thread::thread tocker;
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std::mutex lock;
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std::atomic<bool> done;
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bool running;
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std::atomic<size_t> the_seconds;
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};
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ticker::ticker()
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: done(false),
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running(false),
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the_seconds(0)
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{
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}
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void ticker::start(const size_t life_time)
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{
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std::lock_guard<std::mutex> guard(lock);
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if (!running) {
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rtems::thread::attributes attr;
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attr.set_name("CLCK");
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attr.set_stack_size(8 * 1024);
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attr.set_priority(10);
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running = true;
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tocker = rtems::thread::thread(attr, &ticker::timer, this, life_time);
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}
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}
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bool ticker::finished()
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{
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return done.load();
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}
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size_t ticker::seconds()
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{
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return the_seconds.load();
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}
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void ticker::timer(const size_t life_time)
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{
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while (the_seconds.load() < life_time) {
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std::this_thread::sleep_for(std::chrono::seconds(1));
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the_seconds++;
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}
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done = true;
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std::lock_guard<std::mutex> guard(lock);
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running = false;
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}
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void example_3()
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{
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std::cout << "Start example 3" << std::endl;
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ticker my_ticker;
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my_ticker.start(5);
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while (!my_ticker.finished()) {
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std::this_thread::sleep_for(std::chrono::seconds(2));
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std::cout << "Ticker is " << my_ticker.seconds() << std::endl;
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}
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std::cout << "End example 3" << std::endl;
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}
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