c11_sleep_until.cpp

/*
 * =====================================================================================
 *
 *       Filename:  sleep_until.cpp
 *
 *    Description:
 *
 *        Version:  1.0
 *        Created:  2016年05月25日 11时48分32秒
 *  Last Modified:  2016年05月25日 11时48分32秒
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  zt (),
 *   Organization:
 *
 * =====================================================================================
 */

// this_thread::sleep_for example
#include <iostream>       // std::cout
#include <iomanip>        // std::put_time
#include <thread>         // std::this_thread::sleep_until
#include <chrono>         // std::chrono::system_clock
#include <ctime>          // std::time_t, std::tm, std::localtime, std::mktime

int main()
{
  using std::chrono::system_clock;
  std::time_t tt = system_clock::to_time_t ( system_clock::now() );

  struct std::tm* ptm = std::localtime ( &tt );
  std::cout << "Current time: " << std::put_time ( ptm, "%X" ) << '\n';

  std::cout << "Waiting for the next minute to begin...\n";
  ++ptm->tm_min;
  ptm->tm_sec = 0;
  std::this_thread::sleep_until ( system_clock::from_time_t ( mktime ( ptm ) ) );

  std::cout << std::put_time ( ptm, "%X" ) << " reached!\n";

  return 0;
}