Вызов функции с определенной частотой - C++ - Ответ 4841260

#include <iostream>
#include <chrono>
#include <thread>
 
using namespace std;
 
enum {
    FREQ_HZ = 100,
    INV_FREQ_HZ = 1000000 / FREQ_HZ
};
 
void func() {
    std::cout << "*";
}
 
int main()
{
    for ( ; ; ) {
        chrono::high_resolution_clock::time_point t = chrono::high_resolution_clock::now();
 
        func();
 
        int us = chrono::duration_cast< chrono::microseconds >( chrono::high_resolution_clock::now() - t ).count();
        if ( us < INV_FREQ_HZ ) {
            this_thread::sleep_for( chrono::microseconds( INV_FREQ_HZ - us ) );
        }
    }
 
    return 0;
}

#define BOOST_THREAD_USE_LIB
 
#include <boost/chrono.hpp>
#include <boost/thread.hpp>
#include <iostream>
#include <iomanip>
#include <cstdlib>
 
using namespace std;
 
enum {
    FREQ_HZ = 1000,
    INV_FREQ_HZ = 1000000 / FREQ_HZ
};
 
void dummy() {
    boost::this_thread::sleep( boost::posix_time::microseconds( rand() % 2000 + 1000 ) );
}
 
int main()
{
    for ( ; ; ) {
        boost::chrono::high_resolution_clock::time_point t = boost::chrono::high_resolution_clock::now();
 
        dummy();
 
        int us = boost::chrono::duration_cast< boost::chrono::microseconds >( boost::chrono::high_resolution_clock::now() - t ).count();
        cout << us;
 
        if ( us < INV_FREQ_HZ ) {
            boost::this_thread::sleep( boost::posix_time::microseconds( INV_FREQ_HZ - us ) );
            cout << ", " << INV_FREQ_HZ - us;
        }
        cout << endl;
    }
 
    return 0;
}