50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
/**
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* Copyright 2024, XGBoost Contributors
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*/
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#include <gtest/gtest.h>
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#include <cstddef> // for size_t
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#include <cstdint> // for int32_t
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#include <future> // for future
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#include <thread> // for sleep_for, thread
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#include "../../../src/common/threadpool.h"
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namespace xgboost::common {
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TEST(ThreadPool, Basic) {
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std::int32_t n_threads = std::thread::hardware_concurrency();
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ThreadPool pool{n_threads};
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{
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auto fut = pool.Submit([] { return 3; });
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ASSERT_EQ(fut.get(), 3);
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}
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{
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auto fut = pool.Submit([] { return std::string{"ok"}; });
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ASSERT_EQ(fut.get(), "ok");
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}
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{
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std::vector<std::future<std::size_t>> futures;
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for (std::size_t i = 0; i < static_cast<std::size_t>(n_threads) * 16; ++i) {
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futures.emplace_back(pool.Submit([=] {
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std::this_thread::sleep_for(std::chrono::milliseconds{10});
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return i;
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}));
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}
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for (std::size_t i = 0; i < futures.size(); ++i) {
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ASSERT_EQ(futures[i].get(), i);
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}
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}
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{
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std::vector<std::future<std::size_t>> futures;
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for (std::size_t i = 0; i < static_cast<std::size_t>(n_threads) * 16; ++i) {
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futures.emplace_back(pool.Submit([=] {
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return i;
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}));
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}
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for (std::size_t i = 0; i < futures.size(); ++i) {
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ASSERT_EQ(futures[i].get(), i);
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}
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}
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}
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} // namespace xgboost::common
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