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#include "event.h"
#include <library/cpp/testing/unittest/registar.h>
#include <util/thread/pool.h>
#include <atomic>
namespace {
struct TSharedData {
std::atomic<size_t> Counter = 0;
TManualEvent event;
bool failed = false;
};
struct TThreadTask: public IObjectInQueue {
public:
TThreadTask(TSharedData& data, size_t id)
: Data_(data)
, Id_(id)
{
}
void Process(void*) override {
THolder<TThreadTask> This(this);
if (Id_ == 0) {
usleep(100);
bool cond = Data_.Counter.load() == 0;
if (!cond) {
Data_.failed = true;
}
Data_.event.Signal();
} else {
while (!Data_.event.WaitT(TDuration::Seconds(100))) {
}
Data_.Counter += Id_;
}
}
private:
TSharedData& Data_;
size_t Id_;
};
class TSignalTask: public IObjectInQueue {
private:
TManualEvent& Ev_;
public:
TSignalTask(TManualEvent& ev)
: Ev_(ev)
{
}
void Process(void*) override {
Ev_.Signal();
}
};
class TOwnerTask: public IObjectInQueue {
public:
TManualEvent Barrier;
THolder<TManualEvent> Ev;
public:
TOwnerTask()
: Ev(new TManualEvent)
{
}
void Process(void*) override {
Ev->WaitI();
Ev.Destroy();
}
};
}
Y_UNIT_TEST_SUITE(EventTest) {
Y_UNIT_TEST(WaitAndSignalTest) {
TSharedData data;
TThreadPool queue;
queue.Start(5);
for (size_t i = 0; i < 5; ++i) {
UNIT_ASSERT(queue.Add(new TThreadTask(data, i)));
}
queue.Stop();
UNIT_ASSERT(data.Counter.load() == 10);
UNIT_ASSERT(!data.failed);
}
Y_UNIT_TEST(ConcurrentSignalAndWaitTest) {
// test for problem detected by thread-sanitizer (signal/wait race) SEARCH-2113
const size_t limit = 200;
TManualEvent event[limit];
TThreadPool queue;
queue.Start(limit);
TVector<THolder<IObjectInQueue>> tasks;
for (size_t i = 0; i < limit; ++i) {
tasks.emplace_back(MakeHolder<TSignalTask>(event[i]));
UNIT_ASSERT(queue.Add(tasks.back().Get()));
}
for (size_t i = limit; i != 0; --i) {
UNIT_ASSERT(event[i - 1].WaitT(TDuration::Seconds(90)));
}
queue.Stop();
}
/** Test for a problem: http://nga.at.yandex-team.ru/5772 */
Y_UNIT_TEST(DestructorBeforeSignalFinishTest) {
return;
TVector<THolder<IObjectInQueue>> tasks;
for (size_t i = 0; i < 1000; ++i) {
auto owner = MakeHolder<TOwnerTask>();
tasks.emplace_back(MakeHolder<TSignalTask>(*owner->Ev));
tasks.emplace_back(std::move(owner));
}
TThreadPool queue;
queue.Start(4);
for (auto& task : tasks) {
UNIT_ASSERT(queue.Add(task.Get()));
}
queue.Stop();
}
}
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