ctime в c

Ответ от Николай Фильченко[гуру]
#incldue <time.h>
#include <boost/thread.hpp>
#include <boost/function.hpp>
#include <boost/bind.hpp>
#include <iostream>
void sleep_s(size_t time)
{
#ifdef BOOST_WINDOWS
Sleep(time * 1000);
#else
usleep(time * 1000000);
#endif
}
void task_exec(size_t time, boost::function<void()> task)
{
while(true)
{
task();
sleep_s(time);
}
}
void crone_start(size_t time, boost::function<void()> task)
{
static shared_ptr<boost::thread> thread = make_shared<boost::thread>(
boost::bind(&task_exec, time, task));
}
///////////
void my_function()
{
std::cout << "Hello!" << std::endl;
}
core_start(2, my_function);