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#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
#include <doctest.h>
#include <taskflow/taskflow.hpp>
// EmptyFuture
TEST_CASE("EmptyFuture" * doctest::timeout(300)) {
tf::Future<void> fu;
REQUIRE(fu.valid() == false);
REQUIRE(fu.cancel() == false);
}
// Future
TEST_CASE("Future" * doctest::timeout(300)) {
tf::Taskflow taskflow;
tf::Executor executor(4);
std::atomic<int> counter{0};
for(int i=0; i<100; i++) {
taskflow.emplace([&](){
counter.fetch_add(1, std::memory_order_relaxed);
});
}
auto fu = executor.run(taskflow);
fu.get();
REQUIRE(counter == 100);
}
// Cancel
TEST_CASE("BasicCancellation" * doctest::timeout(300)) {
tf::Taskflow taskflow;
tf::Executor executor(4);
std::atomic<int> counter{0};
// artificially long (possible larger than 300 seconds)
for(int i=0; i<10000; i++) {
taskflow.emplace([&](){
std::this_thread::sleep_for(std::chrono::milliseconds(100));
counter.fetch_add(1, std::memory_order_relaxed);
});
}
// a new round
counter = 0;
auto fu = executor.run(taskflow);
REQUIRE(fu.cancel() == true);
fu.get();
REQUIRE(counter < 10000);
// a new round
counter = 0;
fu = executor.run_n(taskflow, 100);
REQUIRE(fu.cancel() == true);
fu.get();
REQUIRE(counter < 10000);
}
// multiple cnacels
TEST_CASE("MultipleCancellations" * doctest::timeout(300)) {
tf::Taskflow taskflow1, taskflow2, taskflow3, taskflow4;
tf::Executor executor(4);
std::atomic<int> counter{0};
// artificially long (possible larger than 300 seconds)
for(int i=0; i<10000; i++) {
taskflow1.emplace([&](){
std::this_thread::sleep_for(std::chrono::milliseconds(100));
counter.fetch_add(1, std::memory_order_relaxed);
});
taskflow2.emplace([&](){
std::this_thread::sleep_for(std::chrono::milliseconds(100));
counter.fetch_add(1, std::memory_order_relaxed);
});
taskflow3.emplace([&](){
std::this_thread::sleep_for(std::chrono::milliseconds(100));
counter.fetch_add(1, std::memory_order_relaxed);
});
taskflow4.emplace([&](){
std::this_thread::sleep_for(std::chrono::milliseconds(100));
counter.fetch_add(1, std::memory_order_relaxed);
});
}
// a new round
counter = 0;
auto fu1 = executor.run(taskflow1);
auto fu2 = executor.run(taskflow2);
auto fu3 = executor.run(taskflow3);
auto fu4 = executor.run(taskflow4);
REQUIRE(fu1.cancel() == true);
REQUIRE(fu2.cancel() == true);
REQUIRE(fu3.cancel() == true);
REQUIRE(fu4.cancel() == true);
executor.wait_for_all();
REQUIRE(counter < 10000);
REQUIRE(fu1.wait_for(std::chrono::milliseconds(0)) == std::future_status::ready);
REQUIRE(fu2.wait_for(std::chrono::milliseconds(0)) == std::future_status::ready);
REQUIRE(fu3.wait_for(std::chrono::milliseconds(0)) == std::future_status::ready);
REQUIRE(fu4.wait_for(std::chrono::milliseconds(0)) == std::future_status::ready);
}
// Cancel linear chain
//TEST_CASE("CancelLinearChain" * doctest::timeout(300)) {
//
// tf::Taskflow taskflow;
// tf::Executor executor(4);
// tf::Future<void>* future;
//
// std::atomic<int> counter{0};
// tf::Task prev, curr;
//
// for(int i=0; i<10000; i++) {
// curr = taskflow.emplace([&, i](){
// counter.fetch_add(1, std::memory_order_relaxed);
// if(i == 5000) {
// future->cancel();
// }
// });
// if(i) {
// prev.precede(curr);
// }
// prev = curr;
// }
//
// future = executor.run(taskflow);
// future->wait();
//}
// cancel subflow
TEST_CASE("CancelSubflow" * doctest::timeout(300)) {
tf::Taskflow taskflow;
tf::Executor executor(4);
std::atomic<int> counter{0};
// artificially long (possible larger than 300 seconds)
for(int i=0; i<100; i++) {
taskflow.emplace([&, i](tf::Subflow& sf){
for(int j=0; j<100; j++) {
sf.emplace([&](){
std::this_thread::sleep_for(std::chrono::milliseconds(100));
counter.fetch_add(1, std::memory_order_relaxed);
});
}
if(i % 2) {
sf.join();
}
else {
sf.detach();
}
});
}
// a new round
counter = 0;
auto fu = executor.run(taskflow);
REQUIRE(fu.cancel() == true);
fu.get();
REQUIRE(counter < 10000);
// a new round
counter = 0;
auto fu1 = executor.run(taskflow);
auto fu2 = executor.run(taskflow);
auto fu3 = executor.run(taskflow);
REQUIRE(fu1.cancel() == true);
REQUIRE(fu2.cancel() == true);
REQUIRE(fu3.cancel() == true);
fu1.get();
fu2.get();
fu3.get();
REQUIRE(counter < 10000);
}
// cancel infinite loop
TEST_CASE("CancelInfiniteLoop" * doctest::timeout(300)) {
tf::Taskflow taskflow;
tf::Executor executor(4);
for(int i=0; i<100; i++) {
auto a = taskflow.emplace([](){});
auto b = taskflow.emplace([](){ return 0; });
a.precede(b);
b.precede(b);
}
auto fu = executor.run(taskflow);
REQUIRE(fu.cancel() == true);
fu.get();
}
// cancel from another
TEST_CASE("CancelFromAnother" * doctest::timeout(300)) {
tf::Taskflow taskflow, another;
tf::Executor executor(4);
// create a single inifnite loop
auto a = taskflow.emplace([](){});
auto b = taskflow.emplace([](){ return 0; });
a.precede(b);
b.precede(b);
auto fu = executor.run(taskflow);
REQUIRE(fu.wait_for(
std::chrono::milliseconds(100)) == std::future_status::timeout
);
// create a task to cancel another flow
another.emplace([&]() { REQUIRE(fu.cancel() == true); });
executor.run(another).wait();
}
// cancel from async task
TEST_CASE("CancelFromAsync" * doctest::timeout(300)) {
tf::Taskflow taskflow;
tf::Executor executor(4);
// create a single inifnite loop
auto a = taskflow.emplace([](){});
auto b = taskflow.emplace([&](){ return 0; });
a.precede(b);
b.precede(b);
executor.async([&](){
auto fu = executor.run_n(taskflow, 100);
std::this_thread::sleep_for(std::chrono::milliseconds(100));
REQUIRE(fu.cancel() == true);
});
executor.wait_for_all();
}
// cancel composition tasks
TEST_CASE("CancelComposition") {
tf::Executor executor(4);
// f1 has two independent tasks
tf::Taskflow f1("F1");
auto f1A = f1.emplace([&](){ });
auto f1B = f1.emplace([&](){ });
f1A.name("f1A");
f1B.name("f1B");
// f2A ---
// |----> f2C
// f2B ---
//
// f1_module_task
tf::Taskflow f2("F2");
auto f2A = f2.emplace([&](){ });
auto f2B = f2.emplace([&](){ });
auto f2C = f2.emplace([&](){ });
f2A.name("f2A");
f2B.name("f2B");
f2C.name("f2C");
f2A.precede(f2C);
f2B.precede(f2C);
f2.composed_of(f1).name("module_of_f1");
// f3 has a module task (f2) and a regular task
tf::Taskflow f3("F3");
f3.composed_of(f2).name("module_of_f2");
f3.emplace([](){ }).name("f3A");
// f4: f3_module_task -> f2_module_task
tf::Taskflow f4;
f4.name("F4");
auto f3_module_task = f4.composed_of(f3).name("module_of_f3");
auto f2_module_task = f4.composed_of(f2).name("module_of_f2");
f3_module_task.precede(f2_module_task);
std::vector<tf::Future<void>> futures;
for(int r=0; r<100; r++) {
size_t N = 100;
size_t success = 0;
futures.clear();
for(int i=0; i<100; i++) {
futures.emplace_back(executor.run(f4));
}
for(auto& fu: futures) {
success += (fu.cancel() ? 1 : 0);
}
executor.wait_for_all();
REQUIRE(success <= N);
}
}
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