Method Cancel

library/cpp/threading/future/async_semaphore.cpp:53–62

}

void TAsyncSemaphore::Cancel() {
    std::list<TPromise<TPtr>> promises;
    with_lock(Lock_) {
        Cancelled_ = true;
        std::swap(Promises_, promises);
    }
    for (auto& p: promises) {
        p.SetException(std::make_exception_ptr(TOperationCancelledException()));
    }
}

TAsyncSemaphore::TAutoRelease::~TAutoRelease() {
    if (Sem) {