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threadpool_cxx14.cpp
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99 lines (75 loc) · 2.53 KB
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// 2018/09/02 - contributed by Glen Fraser
// - added wait_for_all test
//
// 2018/08/28 - contributed by Glen Fraser
// - added basic test
#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
#include <doctest.h>
#include <taskflow/threadpool/threadpool_cxx14.hpp>
#include <vector>
#include <utility>
#include <chrono>
#include <limits.h>
// --------------------------------------------------------
// Testcase: Threadpool.Basic
// --------------------------------------------------------
TEST_CASE("Threadpool.Basic" * doctest::timeout(5)) {
using namespace std::chrono_literals;
size_t num_workers = 4;
size_t num_tasks = 1000;
tf::Threadpool tp(static_cast<unsigned>(num_workers));
REQUIRE(tp.num_workers() == num_workers);
std::atomic<int> counter {0};
std::vector<std::future<void>> void_tasks;
for(size_t i=0;i<num_tasks;i++){
void_tasks.emplace_back(tp.async([&counter, &tp]() {
REQUIRE(tp.is_worker());
counter += 1;
}));
}
REQUIRE(!tp.is_worker());
{
auto& fu = void_tasks.front();
REQUIRE(fu.wait_for(1s) == std::future_status::ready);
REQUIRE(tp.num_tasks() < num_tasks);
}
for (auto& fu : void_tasks) {
fu.get();
}
REQUIRE(tp.num_tasks() == 0);
REQUIRE(counter == num_tasks);
tp.spawn(1);
REQUIRE(tp.num_workers() == num_workers + 1);
tp.shutdown();
REQUIRE(tp.num_workers() == 0);
tp.spawn(static_cast<unsigned>(num_workers));
REQUIRE(tp.num_workers() == num_workers);
}
// --------------------------------------------------------
// Testcase: Threadpool.WaitForAll
// --------------------------------------------------------
TEST_CASE("Threadpool.WaitForAll" * doctest::timeout(5)) {
using namespace std::chrono_literals;
size_t num_workers = 4;
size_t num_tasks = 100;
tf::Threadpool tp(static_cast<unsigned>(num_workers));
std::atomic<int> counter{ 0 };
std::vector<std::future<void>> void_tasks;
for (size_t i = 0; i<num_tasks; i++) {
void_tasks.emplace_back(tp.async([=, &counter]() {
std::this_thread::sleep_for((num_tasks - i) * 1ms);
++counter;
}));
}
REQUIRE(void_tasks.front().wait_for(1s) == std::future_status::ready);
REQUIRE(void_tasks.back().wait_for(0s) != std::future_status::ready);
tp.wait_for_all();
// Last task should be done by now...
REQUIRE(void_tasks.back().wait_for(0s) == std::future_status::ready);
// In fact, all tasks should be done!
for (auto& fu : void_tasks) {
REQUIRE(fu.wait_for(0s) == std::future_status::ready);
}
REQUIRE(tp.num_tasks() == 0);
REQUIRE(counter == num_tasks);
}