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