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- // Copyright Oliver Kowalke 2015.
- // Distributed under the Boost Software License, Version 1.0.
- // (See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- // based on https://github.com/atemerev/skynet from Alexander Temerev
- #include <algorithm>
- #include <cassert>
- #include <chrono>
- #include <condition_variable>
- #include <cstddef>
- #include <cstdint>
- #include <cstdlib>
- #include <queue>
- #include <future>
- #include <iostream>
- #include <memory>
- #include <mutex>
- #include <numeric>
- #include <random>
- #include <sstream>
- #include <vector>
- #include "buffered_channel.hpp"
- using channel_type = buffered_channel< std::uint64_t >;
- using clock_type = std::chrono::steady_clock;
- using duration_type = clock_type::duration;
- using time_point_type = clock_type::time_point;
- // microbenchmark
- std::uint64_t skynet( std::uint64_t num, std::uint64_t size, std::uint64_t div)
- {
- if ( size != 1){
- size /= div;
- std::vector<std::future<std::uint64_t> > results;
- results.reserve( div);
- for ( std::uint64_t i = 0; i != div; ++i) {
- std::uint64_t sub_num = num + i * size;
- results.emplace_back(
- std::async( skynet, sub_num, size, div) );
- }
- std::uint64_t sum = 0;
- for ( auto& f : results)
- sum += f.get();
-
- return sum;
- }
- return num;
- }
- int main() {
- try {
- std::size_t size{ 10000 };
- std::size_t div{ 10 };
- std::uint64_t result{ 0 };
- duration_type duration{ duration_type::zero() };
- time_point_type start{ clock_type::now() };
- result = skynet( 0, size, div);
- duration = clock_type::now() - start;
- std::cout << "Result: " << result << " in " << duration.count() / 1000000 << " ms" << std::endl;
- std::cout << "done." << std::endl;
- return EXIT_SUCCESS;
- } catch ( std::exception const& e) {
- std::cerr << "exception: " << e.what() << std::endl;
- } catch (...) {
- std::cerr << "unhandled exception" << std::endl;
- }
- return EXIT_FAILURE;
- }
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