1 #include <algorithm>
2 #include <cassert>
3 #include <chrono>
4 #include <cstddef>
5 #include <cstdint>
6 #include <cstdlib>
7 #include <iostream>
8 #include <memory>
9 #include <numeric>
10 #include <thread>
11 #include <vector>
12
13 #include "buffered_channel.hpp"
14
15 using channel_type = buffered_channel< std::uint64_t >;
16 using clock_type = std::chrono::steady_clock;
17 using duration_type = clock_type::duration;
18 using time_point_type = clock_type::time_point;
19
20 // microbenchmark
skynet(channel_type & c,std::size_t num,std::size_t size,std::size_t div)21 void skynet( channel_type & c, std::size_t num, std::size_t size, std::size_t div) {
22 if ( 1 == size) {
23 c.push( num);
24 } else {
25 channel_type rc{ 16 };
26 for ( std::size_t i = 0; i < div; ++i) {
27 auto sub_num = num + i * size / div;
28 std::thread{ skynet, std::ref( rc), sub_num, size / div, div }.detach();
29 }
30 std::uint64_t sum{ 0 };
31 for ( std::size_t i = 0; i < div; ++i) {
32 sum += rc.value_pop();
33 }
34 c.push( sum);
35 }
36 }
37
main()38 int main() {
39 try {
40 std::size_t size{ 10000 };
41 std::size_t div{ 10 };
42 std::uint64_t result{ 0 };
43 duration_type duration{ duration_type::zero() };
44 channel_type rc{ 2 };
45 time_point_type start{ clock_type::now() };
46 skynet( rc, 0, size, div);
47 result = rc.value_pop();
48 duration = clock_type::now() - start;
49 std::cout << "Result: " << result << " in " << duration.count() / 1000000 << " ms" << std::endl;
50 std::cout << "done." << std::endl;
51 return EXIT_SUCCESS;
52 } catch ( std::exception const& e) {
53 std::cerr << "exception: " << e.what() << std::endl;
54 } catch (...) {
55 std::cerr << "unhandled exception" << std::endl;
56 }
57 return EXIT_FAILURE;
58 }
59