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- #include <algorithm>
- #include <cassert>
- #include <chrono>
- #include <cstddef>
- #include <cstdint>
- #include <cstdlib>
- #include <iostream>
- #include <memory>
- #include <numeric>
- #include <thread>
- #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
- void skynet( channel_type & c, std::size_t num, std::size_t size, std::size_t div) {
- if ( 1 == size) {
- c.push( num);
- } else {
- channel_type rc{ 16 };
- for ( std::size_t i = 0; i < div; ++i) {
- auto sub_num = num + i * size / div;
- std::thread{ skynet, std::ref( rc), sub_num, size / div, div }.detach();
- }
- std::uint64_t sum{ 0 };
- for ( std::size_t i = 0; i < div; ++i) {
- sum += rc.value_pop();
- }
- c.push( sum);
- }
- }
- int main() {
- try {
- std::size_t size{ 10000 };
- std::size_t div{ 10 };
- std::uint64_t result{ 0 };
- duration_type duration{ duration_type::zero() };
- channel_type rc{ 2 };
- time_point_type start{ clock_type::now() };
- skynet( rc, 0, size, div);
- result = rc.value_pop();
- 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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