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#include "async_semaphore.h"
#include "async.h"
#include <library/cpp/testing/unittest/registar.h>
#include <library/cpp/threading/cancellation/operation_cancelled_exception.h>
#include <util/generic/scope.h>
#include <util/generic/vector.h>
#include <util/thread/pool.h>
using namespace NThreading;
Y_UNIT_TEST_SUITE(TSemaphoreAsync) {
Y_UNIT_TEST(SimplyAquired) {
const size_t MAX_IN_PROGRESS = 5;
TSimpleThreadPool pool(TThreadPool::TParams().SetCatching(false));
pool.Start(MAX_IN_PROGRESS * 2);
TVector<TFuture<size_t>> futures;
auto semaphore = TAsyncSemaphore::Make(MAX_IN_PROGRESS);
for (size_t i = 0; i < 100; ++i) {
auto f = semaphore->AcquireAsync()
.Apply([&pool, i](const auto& f) -> TFuture<size_t> {
return Async([i, semaphore = f.GetValue()] {
auto guard = semaphore->MakeAutoRelease();
Sleep(TDuration::MilliSeconds(100));
return i;
}, pool);
});
futures.push_back(f);
}
for (size_t i = 0; i < 100; ++i) {
UNIT_ASSERT_VALUES_EQUAL(futures[i].GetValueSync(), i);
}
}
Y_UNIT_TEST(AutoReleasedOnException) {
auto semaphore = TAsyncSemaphore::Make(1);
auto lock = semaphore->AcquireAsync();
UNIT_ASSERT(lock.HasValue());
auto waitingLock = semaphore->AcquireAsync();
UNIT_ASSERT(!waitingLock.HasValue() && !waitingLock.HasException());
auto future = lock.Apply([](const auto& f) {
auto guard = f.GetValue()->MakeAutoRelease();
ythrow yexception() << "oops";
});
UNIT_ASSERT(future.HasException());
UNIT_ASSERT(waitingLock.HasValue());
}
Y_UNIT_TEST(LimitsParallelism) {
const size_t MAX_IN_PROGRESS = 5;
TSimpleThreadPool pool(TThreadPool::TParams().SetCatching(false));
pool.Start(MAX_IN_PROGRESS * 2);
std::atomic_uint64_t inProgress = 0;
TVector<TFuture<size_t>> futures;
auto semaphore = TAsyncSemaphore::Make(MAX_IN_PROGRESS);
for (size_t i = 0; i < 100; ++i) {
auto f = semaphore->AcquireAsync()
.Apply([&, i](const auto&) -> TFuture<size_t> {
auto currentInProgress = inProgress.fetch_add(1) + 1;
UNIT_ASSERT_GT(currentInProgress, 0);
UNIT_ASSERT_LE(currentInProgress, MAX_IN_PROGRESS);
return Async([i] {
Sleep(TDuration::MilliSeconds(100));
return i;
}, pool);
});
f.IgnoreResult().Subscribe([&](const auto&) {
auto currentInProgress = inProgress.fetch_sub(1) - 1;
UNIT_ASSERT_GE(currentInProgress, 0);
UNIT_ASSERT_LE(currentInProgress, MAX_IN_PROGRESS);
semaphore->Release();
});
futures.push_back(f);
}
WaitAll(futures).Wait();
UNIT_ASSERT_EQUAL(inProgress.load(), 0);
}
Y_UNIT_TEST(AcquisitionOrder) {
const size_t MAX_IN_PROGRESS = 5;
TSimpleThreadPool pool(TThreadPool::TParams().SetCatching(false));
pool.Start(MAX_IN_PROGRESS * 2);
std::atomic_size_t latestId = 0;
TVector<TFuture<size_t>> futures;
auto semaphore = TAsyncSemaphore::Make(MAX_IN_PROGRESS);
for (size_t i = 0; i < 100; ++i) {
auto f = semaphore->AcquireAsync()
.Apply([&](const auto& f) -> size_t {
auto guard = f.GetValue()->MakeAutoRelease();
auto currentId = latestId.fetch_add(1);
return currentId;
});
futures.push_back(f);
}
for (size_t i = 0; i < 100; ++i) {
UNIT_ASSERT_VALUES_EQUAL(futures[i].GetValueSync(), i);
}
}
Y_UNIT_TEST(Cancel) {
auto semaphore = TAsyncSemaphore::Make(1);
auto firstLock = semaphore->AcquireAsync();
auto canceledLock = semaphore->AcquireAsync();
UNIT_ASSERT(firstLock.HasValue());
UNIT_ASSERT(!canceledLock.HasValue());
UNIT_ASSERT(!canceledLock.HasException());
semaphore->Cancel();
UNIT_ASSERT_EXCEPTION(canceledLock.TryRethrow(), TOperationCancelledException);
UNIT_ASSERT_NO_EXCEPTION(firstLock.GetValue()->Release());
}
Y_UNIT_TEST(AcquireAfterCancel) {
auto semaphore = TAsyncSemaphore::Make(1);
semaphore->Cancel();
auto lock = semaphore->AcquireAsync();
UNIT_ASSERT_EXCEPTION(lock.TryRethrow(), TOperationCancelledException);
}
Y_UNIT_TEST(AutoReleaseDeferReleaseReleasesOnException) {
auto semaphore = TAsyncSemaphore::Make(1);
auto lock = semaphore->AcquireAsync();
UNIT_ASSERT(lock.HasValue());
auto waitingLock = semaphore->AcquireAsync();
UNIT_ASSERT(!waitingLock.HasValue() && !waitingLock.HasException());
auto asyncWork = lock.Apply([](const auto& lock) {
lock.TryRethrow();
ythrow yexception() << "oops";
});
asyncWork.Subscribe(semaphore->MakeAutoRelease().DeferRelease());
UNIT_ASSERT(asyncWork.HasException());
UNIT_ASSERT(waitingLock.HasValue());
}
Y_UNIT_TEST(AutoReleaseNotCopyable) {
UNIT_ASSERT(!std::is_copy_constructible_v<TAsyncSemaphore::TAutoRelease>);
UNIT_ASSERT(!std::is_copy_assignable_v<TAsyncSemaphore::TAutoRelease>);
}
}
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