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#include <chrono>
#include <numeric>
#include <seastar/core/app-template.hh>
#include "crimson/thread/ThreadPool.h"
using namespace std::chrono_literals;
using ThreadPool = ceph::thread::ThreadPool;
seastar::future<> test_accumulate(ThreadPool& tp) {
static constexpr auto N = 5;
static constexpr auto M = 1;
auto slow_plus = [&tp](int i) {
return tp.submit([=] {
std::this_thread::sleep_for(10ns);
return i + M;
});
};
return seastar::map_reduce(
boost::irange(0, N), slow_plus, 0, std::plus{}).then([] (int sum) {
auto r = boost::irange(0 + M, N + M);
if (sum != std::accumulate(r.begin(), r.end(), 0)) {
throw std::runtime_error("test_accumulate failed");
}
});
}
int main(int argc, char** argv)
{
ThreadPool tp{2, 128, 0};
seastar::app_template app;
return app.run(argc, argv, [&tp] {
return tp.start().then([&tp] {
return test_accumulate(tp);
}).handle_exception([](auto e) {
std::cerr << "Error: " << e << std::endl;
seastar::engine().exit(1);
}).finally([&tp] {
return tp.stop();
});
});
}
/*
* Local Variables:
* compile-command: "make -j4 \
* -C ../../../build \
* unittest_seastar_thread_pool"
* End:
*/
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