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License: MIT License
The RStein.AsyncCpp library is a set of types that should be familiar for anyone who knows the Task Parallel Library (TPL) for .NET (C#).
License: MIT License
CP.51: Do not use capturing lambdas that are coroutines
https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#cp51-do-not-use-capturing-lambdas-that-are-coroutines
I'm getting a weird exception / crash at end of runtime.
This console program produces it:
#include <RStein.AsyncCpp/Tasks/TaskCompletionSource.h>
int main()
{
RStein::AsyncCpp::Tasks::TaskCompletionSource<__int64> _tCS;
}
I had never heard of atexit() before this, and it was quite confusing. Should I ignore this crashing? Is there a work-around?
Here is the call stack for the above:
> [Inline Frame] FolderOpenerTestConsole.exe!std::thread::{dtor}() Line 95 C++
[Inline Frame] FolderOpenerTestConsole.exe!std::destroy_at(std::thread * const) Line 325 C++
[Inline Frame] FolderOpenerTestConsole.exe!std::_Default_allocator_traits<std::allocator<std::thread>>::destroy(std::allocator<std::thread> &) Line 721 C++
[Inline Frame] FolderOpenerTestConsole.exe!std::_Destroy_range(std::thread * _First, std::thread * const) Line 950 C++
[Inline Frame] FolderOpenerTestConsole.exe!std::vector<std::thread,std::allocator<std::thread>>::_Destroy(std::thread * _First, std::thread * _Last) Line 1680 C++
[Inline Frame] FolderOpenerTestConsole.exe!std::vector<std::thread,std::allocator<std::thread>>::_Tidy() Line 1764 C++
FolderOpenerTestConsole.exe!std::vector<std::thread,std::allocator<std::thread>>::~vector<std::thread,std::allocator<std::thread>>() Line 712 C++
[Inline Frame] FolderOpenerTestConsole.exe!RStein::AsyncCpp::Schedulers::SimpleThreadPool::{dtor}() Line 35 C++
FolderOpenerTestConsole.exe!`RStein::AsyncCpp::Schedulers::Scheduler::initDefaultScheduler'::`2'::`dynamic atexit destructor for 'threadPool''() C++
ucrtbase.dll!00007ffb4f4cbea0() Unknown
ucrtbase.dll!00007ffb4f4cbdb7() Unknown
ucrtbase.dll!00007ffb4f4cbd6d() Unknown
ucrtbase.dll!00007ffb4f4ca17a() Unknown
ucrtbase.dll!00007ffb4f4ca10f() Unknown
ucrtbase.dll!00007ffb4f4ca0af() Unknown
FolderOpenerTestConsole.exe!__scrt_common_main_seh() Line 295 C++
kernel32.dll!00007ffb4f5e54e0() Unknown
ntdll.dll!00007ffb5174485b() Unknown
I am struggling. Where is gtest.h?
Update: ok it looks like I had to include Google's testing.
BTW it's great that someone is doing a C++ equivalent of this stuff from c#, thanks.
Will you implement BufferBlock counterpart in DataFlow here? I think it's a useful feature to work together with coroutine.
Do you have any idea why this is? I have set the c++ version to latest and added /await compiler flag.
I am able to co_await a std::future, so I am probably able to use a lot of Rstein.AsyncCpp already.
This doesn't compile:
Windows::Foundation::IAsyncAction MainPage::ClickHandler(IInspectable const&, RoutedEventArgs const&)
{
std::promise<void> promise;
promise.set_value();
std::shared_future<void> _completedFuture = promise.get_future().share();
co_await _completedFuture;
}
I get:
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\include\future(1034,1): error C3312: no callable 'await_resume' function found for type 'std::shared_future'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\include\future(1034,1): error C3312: no callable 'await_ready' function found for type 'std::shared_future'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\include\future(1034,1): error C3312: no callable 'await_suspend' function found for type 'std::shared_future'
So this isn't compiling:
auto transform1 = DataFlowAsyncFactory::CreateTransformBlock<int, string>([](const int& item)-> Tasks::Task<string>
{
auto message = "int: " + to_string(item) + "\n";
cout << message;
//await async operation returning standard shared_future.
co_await GetCompletedSharedFuture();
co_return to_string(item);
});
I am trying to deal with winrt::Windows::Storage::StorageFile objects from c++/winrt . I can just wrap this type, but is there anything else I can do? Is there any hope that default constructors won't be a requirement in the future?
Doesn't compile; "no appropriate default constructor available":
auto m_folderActionBlock =
DataFlowAsyncFactory::CreateActionBlock<winrt::Windows::Storage::StorageFolder>([](const Windows::Storage::StorageFolder& item)-> Tasks::Task<void>
{
// auto message = "Final action: " + item + "\n";
// cout << message;
// await async operation returning Task.
co_await Tasks::GetCompletedTask();
//_processedItems.push_back(item);
});
PR in vcpkg project (merged).
microsoft/vcpkg#16380
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