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Copy pathbasics.cpp
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2462 lines (2006 loc) · 59.7 KB
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#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
#include <doctest.h>
#include <taskflow/taskflow.hpp>
#include <vector>
#include <utility>
#include <chrono>
#include <limits.h>
// --------------------------------------------------------
// Testcase: Builder
// --------------------------------------------------------
TEST_CASE("Builder" * doctest::timeout(300)) {
const size_t num_tasks = 100;
tf::Taskflow taskflow;
tf::Executor executor;
std::atomic<int> counter {0};
std::vector<tf::Task> silent_tasks;
std::vector<tf::Task> tasks;
SUBCASE("EmptyFlow") {
for(unsigned W=1; W<32; ++W) {
tf::Executor executor(W);
tf::Taskflow taskflow;
REQUIRE(taskflow.num_tasks() == 0);
REQUIRE(taskflow.empty() == true);
executor.run(taskflow).wait();
}
}
SUBCASE("Placeholder") {
for(size_t i=0; i<num_tasks; ++i) {
silent_tasks.emplace_back(taskflow.placeholder().name(std::to_string(i)));
}
for(size_t i=0; i<num_tasks; ++i) {
REQUIRE(silent_tasks[i].name() == std::to_string(i));
REQUIRE(silent_tasks[i].num_dependents() == 0);
REQUIRE(silent_tasks[i].num_successors() == 0);
}
for(auto& task : silent_tasks) {
task.work([&counter](){ counter++; });
}
executor.run(taskflow).get();
REQUIRE(counter == num_tasks);
}
SUBCASE("EmbarrassinglyParallel"){
for(size_t i=0;i<num_tasks;i++) {
tasks.emplace_back(taskflow.emplace([&counter]() {counter += 1;}));
}
REQUIRE(taskflow.num_tasks() == num_tasks);
executor.run(taskflow).get();
REQUIRE(counter == num_tasks);
REQUIRE(taskflow.num_tasks() == 100);
counter = 0;
for(size_t i=0;i<num_tasks;i++){
silent_tasks.emplace_back(taskflow.emplace([&counter]() {counter += 1;}));
}
REQUIRE(taskflow.num_tasks() == num_tasks * 2);
executor.run(taskflow).get();
REQUIRE(counter == num_tasks * 2);
REQUIRE(taskflow.num_tasks() == 200);
}
SUBCASE("BinarySequence"){
for(size_t i=0;i<num_tasks;i++){
if(i%2 == 0){
tasks.emplace_back(
taskflow.emplace([&counter]() { REQUIRE(counter == 0); counter += 1;})
);
}
else{
tasks.emplace_back(
taskflow.emplace([&counter]() { REQUIRE(counter == 1); counter -= 1;})
);
}
if(i>0){
//tasks[i-1].first.precede(tasks[i].first);
tasks[i-1].precede(tasks[i]);
}
if(i==0) {
//REQUIRE(tasks[i].first.num_dependents() == 0);
REQUIRE(tasks[i].num_dependents() == 0);
}
else {
//REQUIRE(tasks[i].first.num_dependents() == 1);
REQUIRE(tasks[i].num_dependents() == 1);
}
}
executor.run(taskflow).get();
}
SUBCASE("LinearCounter"){
for(size_t i=0;i<num_tasks;i++){
tasks.emplace_back(
taskflow.emplace([&counter, i]() {
REQUIRE(counter == i); counter += 1;}
)
);
if(i>0){
taskflow.precede(tasks[i-1], tasks[i]);
}
}
executor.run(taskflow).get();
REQUIRE(counter == num_tasks);
REQUIRE(taskflow.num_tasks() == num_tasks);
}
SUBCASE("Broadcast"){
auto src = taskflow.emplace([&counter]() {counter -= 1;});
for(size_t i=1; i<num_tasks; i++){
silent_tasks.emplace_back(
taskflow.emplace([&counter]() {REQUIRE(counter == -1);})
);
}
taskflow.broadcast(src, silent_tasks);
executor.run(taskflow).get();
REQUIRE(counter == - 1);
REQUIRE(taskflow.num_tasks() == num_tasks);
}
SUBCASE("Succeed"){
auto dst = taskflow.emplace([&]() { REQUIRE(counter == num_tasks - 1);});
for(size_t i=1;i<num_tasks;i++){
silent_tasks.emplace_back(
taskflow.emplace([&counter]() {counter += 1;})
);
}
taskflow.gather(silent_tasks, dst);
executor.run(taskflow).get();
REQUIRE(counter == num_tasks - 1);
REQUIRE(taskflow.num_tasks() == num_tasks);
}
SUBCASE("MapReduce"){
auto src = taskflow.emplace([&counter]() {counter = 0;});
for(size_t i=0;i<num_tasks;i++){
silent_tasks.emplace_back(
taskflow.emplace([&counter]() {counter += 1;})
);
}
taskflow.broadcast(src, silent_tasks);
auto dst = taskflow.emplace(
[&counter, num_tasks]() { REQUIRE(counter == num_tasks);}
);
taskflow.gather(silent_tasks, dst);
executor.run(taskflow).get();
REQUIRE(taskflow.num_tasks() == num_tasks + 2);
}
SUBCASE("Linearize"){
for(size_t i=0;i<num_tasks;i++){
silent_tasks.emplace_back(
taskflow.emplace([&counter, i]() {
REQUIRE(counter == i); counter += 1;}
)
);
}
taskflow.linearize(silent_tasks);
executor.run(taskflow).get();
REQUIRE(counter == num_tasks);
REQUIRE(taskflow.num_tasks() == num_tasks);
}
SUBCASE("Kite"){
auto src = taskflow.emplace([&counter]() {counter = 0;});
for(size_t i=0;i<num_tasks;i++){
silent_tasks.emplace_back(
taskflow.emplace([&counter, i]() {
REQUIRE(counter == i); counter += 1; }
)
);
}
taskflow.broadcast(src, silent_tasks);
taskflow.linearize(silent_tasks);
auto dst = taskflow.emplace(
[&counter, num_tasks]() { REQUIRE(counter == num_tasks);}
);
taskflow.gather(silent_tasks, dst);
executor.run(taskflow).get();
REQUIRE(taskflow.num_tasks() == num_tasks + 2);
}
}
// --------------------------------------------------------
// Testcase: Creation
// --------------------------------------------------------
TEST_CASE("Creation" * doctest::timeout(300)) {
std::vector<int> dummy(1000, -1);
auto create_taskflow = [&] () {
for(int i=0; i<10; ++i) {
tf::Taskflow tf;
tf.parallel_for(dummy.begin(), dummy.end(), [] (int) {});
}
};
SUBCASE("One") {
create_taskflow();
REQUIRE(dummy.size() == 1000);
for(auto item : dummy) {
REQUIRE(item == -1);
}
}
SUBCASE("Two") {
std::thread t1(create_taskflow);
std::thread t2(create_taskflow);
t1.join();
t2.join();
REQUIRE(dummy.size() == 1000);
for(auto item : dummy) {
REQUIRE(item == -1);
}
}
SUBCASE("Four") {
std::thread t1(create_taskflow);
std::thread t2(create_taskflow);
std::thread t3(create_taskflow);
std::thread t4(create_taskflow);
t1.join();
t2.join();
t3.join();
t4.join();
REQUIRE(dummy.size() == 1000);
for(auto item : dummy) {
REQUIRE(item == -1);
}
}
}
// --------------------------------------------------------
// Testcase: STDFunction
// --------------------------------------------------------
TEST_CASE("STDFunction" * doctest::timeout(300)) {
tf::Taskflow taskflow;
tf::Executor executor;
int counter = 0;
std::function<void()> func1 = [&] () { ++counter; };
std::function<int()> func2 = [&] () { ++counter; return 0; };
std::function<void()> func3 = [&] () { };
std::function<void()> func4 = [&] () { ++counter;};
// scenario 1
auto A = taskflow.emplace(func1);
auto B = taskflow.emplace(func2);
auto C = taskflow.emplace(func3);
auto D = taskflow.emplace(func4);
A.precede(B);
B.precede(C, D);
executor.run(taskflow).wait();
REQUIRE(counter == 2);
// scenario 2
counter = 0;
A.work(func1);
B.work(func2);
C.work(func4);
D.work(func3);
executor.run(taskflow).wait();
REQUIRE(counter == 3);
// scenario 3
taskflow.clear();
std::tie(A, B, C, D) = taskflow.emplace(
std::move(func1), std::move(func2), std::move(func3), std::move(func4)
);
A.precede(B);
B.precede(C, D);
counter = 0;
executor.run(taskflow).wait();
REQUIRE(counter == 2);
}
// --------------------------------------------------------
// Testcase: Iterators
// --------------------------------------------------------
TEST_CASE("Iterators" * doctest::timeout(300)) {
SUBCASE("Order") {
tf::Taskflow taskflow;
auto A = taskflow.emplace([](){}).name("A");
auto B = taskflow.emplace([](){}).name("B");
auto C = taskflow.emplace([](){}).name("C");
auto D = taskflow.emplace([](){}).name("D");
auto E = taskflow.emplace([](){}).name("E");
A.precede(B, C, D, E);
E.succeed(B, C, D);
A.for_each_successor([&, i=0] (tf::Task s) mutable {
switch(i++) {
case 0:
REQUIRE(s == B);
break;
case 1:
REQUIRE(s == C);
break;
case 2:
REQUIRE(s == D);
break;
case 3:
REQUIRE(s == E);
break;
default:
break;
}
});
E.for_each_dependent([&, i=0](tf::Task s) mutable {
switch(i++) {
case 0:
REQUIRE(s == A);
break;
case 1:
REQUIRE(s == B);
break;
case 2:
REQUIRE(s == C);
break;
case 3:
REQUIRE(s == D);
break;
}
});
}
SUBCASE("Generic") {
tf::Taskflow taskflow;
auto A = taskflow.emplace([](){}).name("A");
auto B = taskflow.emplace([](){}).name("B");
auto C = taskflow.emplace([](){}).name("C");
auto D = taskflow.emplace([](){}).name("D");
auto E = taskflow.emplace([](){}).name("E");
std::vector<tf::Task> tasks;
taskflow.for_each_task([&tasks](tf::Task s){
tasks.push_back(s);
});
REQUIRE(std::find(tasks.begin(), tasks.end(), A) != tasks.end());
A.precede(B);
A.for_each_successor([B](tf::Task s){ REQUIRE(s==B); });
B.for_each_dependent([A](tf::Task s){ REQUIRE(s==A); });
A.precede(C);
A.precede(D);
A.precede(E);
C.precede(B);
D.precede(B);
E.precede(B);
int counter{0}, a{0}, b{0}, c{0}, d{0}, e{0};
A.for_each_successor([&](tf::Task s) {
counter++;
if(s == A) ++a;
if(s == B) ++b;
if(s == C) ++c;
if(s == D) ++d;
if(s == E) ++e;
});
REQUIRE(counter == A.num_successors());
REQUIRE(a==0);
REQUIRE(b==1);
REQUIRE(c==1);
REQUIRE(d==1);
REQUIRE(e==1);
counter = a = b = c = d = e = 0;
B.for_each_dependent([&](tf::Task s) {
counter++;
if(s == A) ++a;
if(s == B) ++b;
if(s == C) ++c;
if(s == D) ++d;
if(s == E) ++e;
});
REQUIRE(counter == B.num_dependents());
REQUIRE(a == 1);
REQUIRE(b == 0);
REQUIRE(c == 1);
REQUIRE(d == 1);
REQUIRE(e == 1);
A.for_each_successor([](tf::Task s){
s.name("A");
});
REQUIRE(A.name() == "A");
REQUIRE(B.name() == "A");
REQUIRE(C.name() == "A");
REQUIRE(D.name() == "A");
REQUIRE(E.name() == "A");
B.for_each_dependent([](tf::Task s){
s.name("B");
});
REQUIRE(A.name() == "B");
REQUIRE(B.name() == "A");
REQUIRE(C.name() == "B");
REQUIRE(D.name() == "B");
REQUIRE(E.name() == "B");
}
}
// --------------------------------------------------------
// Testcase: Hash
// --------------------------------------------------------
TEST_CASE("Hash" * doctest::timeout(300)) {
std::hash<tf::Task> hash;
// empty hash
tf::Task t1, t2;
REQUIRE(hash(t1) == hash(t2));
tf::Taskflow taskflow;
t1 = taskflow.emplace([](){});
REQUIRE(((hash(t1) != hash(t2)) || (hash(t1) == hash(t2) && t1 != t2)));
t2 = taskflow.emplace([](){});
REQUIRE(((hash(t1) != hash(t2)) || (hash(t1) == hash(t2) && t1 != t2)));
t2 = t1;
REQUIRE(hash(t1) == hash(t2));
}
// --------------------------------------------------------
// Testcase: SequentialRuns
// --------------------------------------------------------
void sequential_runs(unsigned W) {
using namespace std::chrono_literals;
size_t num_tasks = 100;
tf::Executor executor(W);
tf::Taskflow taskflow;
std::atomic<int> counter {0};
std::vector<tf::Task> silent_tasks;
for(size_t i=0;i<num_tasks;i++){
silent_tasks.emplace_back(
taskflow.emplace([&counter]() {counter += 1;})
);
}
SUBCASE("RunOnce"){
auto fu = executor.run(taskflow);
REQUIRE(taskflow.num_tasks() == num_tasks);
fu.get();
REQUIRE(counter == num_tasks);
}
SUBCASE("WaitForAll") {
executor.run(taskflow);
executor.wait_for_all();
REQUIRE(counter == num_tasks);
}
SUBCASE("RunWithFuture") {
std::atomic<size_t> count {0};
tf::Taskflow f;
auto A = f.emplace([&](){ count ++; });
auto B = f.emplace([&](tf::Subflow& subflow){
count ++;
auto B1 = subflow.emplace([&](){ count++; });
auto B2 = subflow.emplace([&](){ count++; });
auto B3 = subflow.emplace([&](){ count++; });
B1.precede(B3); B2.precede(B3);
});
auto C = f.emplace([&](){ count ++; });
auto D = f.emplace([&](){ count ++; });
A.precede(B, C);
B.precede(D);
C.precede(D);
std::list<std::future<void>> fu_list;
for(size_t i=0; i<500; i++) {
if(i == 499) {
executor.run(f).get(); // Synchronize the first 500 runs
executor.run_n(f, 500); // Run 500 times more
}
else if(i % 2) {
fu_list.push_back(executor.run(f));
}
else {
fu_list.push_back(executor.run(f, [&, i=i](){
REQUIRE(count == (i+1)*7); })
);
}
}
executor.wait_for_all();
for(auto& fu: fu_list) {
REQUIRE(fu.valid());
REQUIRE(fu.wait_for(std::chrono::seconds(1)) == std::future_status::ready);
}
REQUIRE(count == 7000);
}
SUBCASE("RunWithChange") {
std::atomic<size_t> count {0};
tf::Taskflow f;
auto A = f.emplace([&](){ count ++; });
auto B = f.emplace([&](tf::Subflow& subflow){
count ++;
auto B1 = subflow.emplace([&](){ count++; });
auto B2 = subflow.emplace([&](){ count++; });
auto B3 = subflow.emplace([&](){ count++; });
B1.precede(B3); B2.precede(B3);
});
auto C = f.emplace([&](){ count ++; });
auto D = f.emplace([&](){ count ++; });
A.precede(B, C);
B.precede(D);
C.precede(D);
executor.run_n(f, 10).get();
REQUIRE(count == 70);
auto E = f.emplace([](){});
D.precede(E);
executor.run_n(f, 10).get();
REQUIRE(count == 140);
auto F = f.emplace([](){});
E.precede(F);
executor.run_n(f, 10);
executor.wait_for_all();
REQUIRE(count == 210);
}
SUBCASE("RunWithPred") {
std::atomic<size_t> count {0};
tf::Taskflow f;
auto A = f.emplace([&](){ count ++; });
auto B = f.emplace([&](tf::Subflow& subflow){
count ++;
auto B1 = subflow.emplace([&](){ count++; });
auto B2 = subflow.emplace([&](){ count++; });
auto B3 = subflow.emplace([&](){ count++; });
B1.precede(B3); B2.precede(B3);
});
auto C = f.emplace([&](){ count ++; });
auto D = f.emplace([&](){ count ++; });
A.precede(B, C);
B.precede(D);
C.precede(D);
executor.run_until(f, [run=10]() mutable { return run-- == 0; },
[&](){
REQUIRE(count == 70);
count = 0;
}
).get();
executor.run_until(f, [run=10]() mutable { return run-- == 0; },
[&](){
REQUIRE(count == 70);
count = 0;
auto E = f.emplace([&](){ count ++; });
auto F = f.emplace([&](){ count ++; });
A.precede(E).precede(F);
});
executor.run_until(f, [run=10]() mutable { return run-- == 0; },
[&](){
REQUIRE(count == 90);
count = 0;
}
).get();
}
SUBCASE("MultipleRuns") {
std::atomic<size_t> counter(0);
tf::Taskflow tf1, tf2, tf3, tf4;
for(size_t n=0; n<16; ++n) {
tf1.emplace([&](){counter.fetch_add(1, std::memory_order_relaxed);});
}
for(size_t n=0; n<1024; ++n) {
tf2.emplace([&](){counter.fetch_add(1, std::memory_order_relaxed);});
}
for(size_t n=0; n<32; ++n) {
tf3.emplace([&](){counter.fetch_add(1, std::memory_order_relaxed);});
}
for(size_t n=0; n<128; ++n) {
tf4.emplace([&](){counter.fetch_add(1, std::memory_order_relaxed);});
}
for(int i=0; i<200; ++i) {
executor.run(tf1);
executor.run(tf2);
executor.run(tf3);
executor.run(tf4);
}
executor.wait_for_all();
REQUIRE(counter == 240000);
}
}
TEST_CASE("SerialRuns.1thread" * doctest::timeout(300)) {
sequential_runs(1);
}
TEST_CASE("SerialRuns.2threads" * doctest::timeout(300)) {
sequential_runs(2);
}
TEST_CASE("SerialRuns.3threads" * doctest::timeout(300)) {
sequential_runs(3);
}
TEST_CASE("SerialRuns.4threads" * doctest::timeout(300)) {
sequential_runs(4);
}
TEST_CASE("SerialRuns.5threads" * doctest::timeout(300)) {
sequential_runs(5);
}
TEST_CASE("SerialRuns.6threads" * doctest::timeout(300)) {
sequential_runs(6);
}
TEST_CASE("SerialRuns.7threads" * doctest::timeout(300)) {
sequential_runs(7);
}
TEST_CASE("SerialRuns.8threads" * doctest::timeout(300)) {
sequential_runs(8);
}
// --------------------------------------------------------
// Testcase: ParallelRuns
// --------------------------------------------------------
void parallel_runs(unsigned w) {
std::atomic<int> counter;
std::vector<std::thread> threads;
auto make_taskflow = [&] (tf::Taskflow& tf) {
for(int i=0; i<1024; i++) {
auto A = tf.emplace([&] () {
counter.fetch_add(1, std::memory_order_relaxed);
});
auto B = tf.emplace([&] () {
counter.fetch_add(1, std::memory_order_relaxed);
});
A.precede(B);
}
};
SUBCASE("RunAndWait") {
tf::Executor executor(w);
counter = 0;
for(int t=0; t<32; t++) {
threads.emplace_back([&] () {
tf::Taskflow taskflow;
make_taskflow(taskflow);
executor.run(taskflow).wait();
});
}
for(auto& t : threads) {
t.join();
}
threads.clear();
REQUIRE(counter.load() == 32*1024*2);
}
SUBCASE("RunAndWaitForAll") {
tf::Executor executor(w);
counter = 0;
std::vector<std::unique_ptr<tf::Taskflow>> taskflows(32);
std::atomic<size_t> barrier(0);
for(int t=0; t<32; t++) {
threads.emplace_back([&, t=t] () {
taskflows[t] = std::make_unique<tf::Taskflow>();
make_taskflow(*taskflows[t]);
executor.run(*taskflows[t]);
++barrier; // make sure all runs are issued
});
}
while(barrier != 32);
executor.wait_for_all();
REQUIRE(counter.load() == 32*1024*2);
for(auto& t : threads) {
t.join();
}
threads.clear();
}
}
TEST_CASE("ParallelRuns.1thread" * doctest::timeout(300)) {
parallel_runs(1);
}
TEST_CASE("ParallelRuns.2threads" * doctest::timeout(300)) {
parallel_runs(2);
}
TEST_CASE("ParallelRuns.3threads" * doctest::timeout(300)) {
parallel_runs(3);
}
TEST_CASE("ParallelRuns.4threads" * doctest::timeout(300)) {
parallel_runs(4);
}
TEST_CASE("ParallelRuns.5threads" * doctest::timeout(300)) {
parallel_runs(5);
}
TEST_CASE("ParallelRuns.6threads" * doctest::timeout(300)) {
parallel_runs(6);
}
TEST_CASE("ParallelRuns.7threads" * doctest::timeout(300)) {
parallel_runs(7);
}
TEST_CASE("ParallelRuns.8threads" * doctest::timeout(300)) {
parallel_runs(8);
}
// --------------------------------------------------------
// Testcase: ParallelFor
// --------------------------------------------------------
void parallel_for(unsigned W) {
using namespace std::chrono_literals;
const auto mapper = [](unsigned w, size_t num_data, bool group){
tf::Executor executor(w);
tf::Taskflow tf;
std::vector<int> vec(num_data, 0);
tf.parallel_for(
vec.begin(), vec.end(), [] (int& v) { v = 64; }, group ? ::rand() : 0
);
for(const auto v : vec) {
REQUIRE(v == 0);
}
executor.run(tf);
executor.wait_for_all();
for(const auto v : vec) {
REQUIRE(v == 64);
}
};
const auto reducer = [](unsigned w, size_t num_data, bool group){
tf::Executor executor(w);
tf::Taskflow tf;
std::vector<int> vec(num_data, 0);
std::atomic<int> sum(0);
tf.parallel_for(vec.begin(), vec.end(), [&](auto) { ++sum; }, group ? ::rand() : 0);
REQUIRE(sum == 0);
executor.run(tf);
executor.wait_for_all();
REQUIRE(sum == vec.size());
};
// map
SUBCASE("Map") {
for(size_t num_data=1; num_data<=59049; num_data *= 3){
mapper(W, num_data, true);
mapper(W, num_data, false);
}
}
// reduce
SUBCASE("Reduce") {
for(size_t num_data=1; num_data<=59049; num_data *= 3){
reducer(W, num_data, true);
reducer(W, num_data, false);
}
}
}
TEST_CASE("ParallelFor.1thread" * doctest::timeout(300)) {
parallel_for(1);
}
TEST_CASE("ParallelFor.2threads" * doctest::timeout(300)) {
parallel_for(2);
}
TEST_CASE("ParallelFor.3threads" * doctest::timeout(300)) {
parallel_for(3);
}
TEST_CASE("ParallelFor.4threads" * doctest::timeout(300)) {
parallel_for(4);
}
TEST_CASE("ParallelFor.5threads" * doctest::timeout(300)) {
parallel_for(5);
}
TEST_CASE("ParallelFor.6threads" * doctest::timeout(300)) {
parallel_for(6);
}
TEST_CASE("ParallelFor.7threads" * doctest::timeout(300)) {
parallel_for(7);
}
TEST_CASE("ParallelFor.8threads" * doctest::timeout(300)) {
parallel_for(8);
}
// --------------------------------------------------------
// Testcase: ParallelForOnIndex
// --------------------------------------------------------
void parallel_for_index(unsigned w) {
using namespace std::chrono_literals;
auto exception_test = [] () {
tf::Taskflow tf;
// invalid index
REQUIRE_THROWS(tf.parallel_for(0, 10, 0, [] (auto) {}));
REQUIRE_THROWS(tf.parallel_for(0, 10, -1, [] (auto) {}));
REQUIRE_THROWS(tf.parallel_for(10, 0, 0, [] (auto) {}));
REQUIRE_THROWS(tf.parallel_for(10, 0, 1, [] (auto) {}));
REQUIRE_THROWS(tf.parallel_for(0u, 10u, 0u, [] (auto) {}));
REQUIRE_THROWS(tf.parallel_for(10u, 0u, 0u, [] (auto) {}));
REQUIRE_THROWS(tf.parallel_for(10u, 0u, 1u, [] (auto) {}));
REQUIRE_THROWS(tf.parallel_for(0.0f, 10.0f, 0.0f, [] (auto) {}));
REQUIRE_THROWS(tf.parallel_for(0.0f, 10.0f, -1.0f, [] (auto) {}));
REQUIRE_THROWS(tf.parallel_for(10.0f, 0.0f, 0.0f, [] (auto) {}));
REQUIRE_THROWS(tf.parallel_for(10.0f, 0.0f, 1.0f, [] (auto) {}));
REQUIRE_THROWS(tf.parallel_for(0.0, 10.0, 0.0, [] (auto) {}));
REQUIRE_THROWS(tf.parallel_for(0.0, 10.0, -1.0, [] (auto) {}));
REQUIRE_THROWS(tf.parallel_for(10.0, 0.0, 0.0, [] (auto) {}));
REQUIRE_THROWS(tf.parallel_for(10.0, 0.0, 1.0, [] (auto) {}));
REQUIRE_THROWS(tf.parallel_for(0, 0, 0, [] (auto) {}));
REQUIRE_THROWS(tf.parallel_for(0u, 0u, 0u, [] (auto) {}));
REQUIRE_THROWS(tf.parallel_for(0.0, 0.0, 0.0, [] (auto) {}));
// graceful case
REQUIRE_NOTHROW(tf.parallel_for(0, 0, -1, [] (auto) {}));
REQUIRE_NOTHROW(tf.parallel_for(0, 0, 1, [] (auto) {}));
REQUIRE_NOTHROW(tf.parallel_for(0u, 0u, 1u, [] (auto) {}));
REQUIRE_NOTHROW(tf.parallel_for(0.0f, 0.0f, -1.0f, [] (auto) {}));
REQUIRE_NOTHROW(tf.parallel_for(0.0f, 0.0f, 1.0f, [] (auto) {}));
REQUIRE_NOTHROW(tf.parallel_for(0.0, 0.0, -1.0, [] (auto) {}));
REQUIRE_NOTHROW(tf.parallel_for(0.0, 0.0, 1.0, [] (auto) {}));
};
auto positive_integer_step = [] (unsigned w) {
tf::Executor executor(w);
for(int beg=-10; beg<=10; ++beg) {
for(int end=beg; end<=10; ++end) {
for(int s=1; s<=end-beg; ++s) {
int n = 0;
for(int b = beg; b<end; b+=s) {
++n;
}
tf::Taskflow tf;
std::atomic<int> counter {0};
tf.parallel_for(beg, end, s, [&] (auto) {
counter.fetch_add(1, std::memory_order_relaxed);
});
executor.run(tf);
executor.wait_for_all();
REQUIRE(n == counter);
}
}
}
};
auto negative_integer_step = [] (unsigned w) {
tf::Executor executor(w);
for(int beg=10; beg>=-10; --beg) {
for(int end=beg; end>=-10; --end) {
for(int s=1; s<=beg-end; ++s) {
int n = 0;
for(int b = beg; b>end; b-=s) {
++n;
}
tf::Taskflow tf;
std::atomic<int> counter {0};
tf.parallel_for(beg, end, -s, [&] (auto) {
counter.fetch_add(1, std::memory_order_relaxed);
});
executor.run(tf);
executor.wait_for_all();
REQUIRE(n == counter);
}
}
}
};
auto positive_floating_step = [] (unsigned w) {
tf::Executor executor(w);
for(float beg=-10.0f; beg<=10.0f; ++beg) {
for(float end=beg; end<=10.0f; ++end) {
for(float s=1.0f; s<=end-beg; s+=0.1f) {
int n = 0;
if(beg < end) {
for(float b = beg; b < end; b += s) {
++n;
}
}
else if(beg > end) {
for(float b = beg; b > end; b += s) {
++n;
}
}
tf::Taskflow tf;
std::atomic<int> counter {0};
tf.parallel_for(beg, end, s, [&] (auto) {
counter.fetch_add(1, std::memory_order_relaxed);
});
executor.run(tf);
executor.wait_for_all();
REQUIRE(n == counter);
}
}
}
};
auto negative_floating_step = [] (unsigned w) {
tf::Executor executor(w);
for(float beg=10.0f; beg>=-10.0f; --beg) {
for(float end=beg; end>=-10.0f; --end) {
for(float s=1.0f; s<=beg-end; s+=0.1f) {
int n = 0;
if(beg < end) {
for(float b = beg; b < end; b += (-s)) {
++n;
}
}
else if(beg > end) {
for(float b = beg; b > end; b += (-s)) {
++n;
}
}
tf::Taskflow tf;
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