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- // Copyright (C) 2009-2012 Lorenzo Caminiti
- // Distributed under the Boost Software License, Version 1.0
- // (see accompanying file LICENSE_1_0.txt or a copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- // Home at http://www.boost.org/libs/local_function
- #include <boost/chrono.hpp>
- #include <vector>
- #include <algorithm>
- #include <iostream>
- #include "profile_helpers.hpp"
- struct global_add {
- global_add(double& _sum, const int& _factor): sum(_sum), factor(_factor) {}
- inline void operator()(const double& num) {
- sum += factor * num;
- }
- private:
- double& sum;
- const int& factor;
- };
- int main(int argc, char* argv[]) {
- unsigned long size = 0, trials =0;
- profile::args(argc, argv, size, trials);
- double sum = 0.0;
- int factor = 1;
- boost::chrono::system_clock::time_point start =
- boost::chrono::system_clock::now();
- global_add add(sum, factor);
- boost::chrono::duration<double> decl_sec =
- boost::chrono::system_clock::now() - start;
- std::vector<double> v(size);
- std::fill(v.begin(), v.end(), 1.0);
- boost::chrono::duration<double> trials_sec;
- for(unsigned long i = 0; i < trials; ++i) {
- boost::chrono::system_clock::time_point start =
- boost::chrono::system_clock::now();
- std::for_each(v.begin(), v.end(), add);
- trials_sec += boost::chrono::system_clock::now() - start;
- }
- profile::display(size, trials, sum, trials_sec.count(), decl_sec.count());
- return 0;
- }
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