gstreamer/subprojects/gst-plugins-bad/sys/wasapi2/AsyncOperations.h

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// MIT License
//
// Copyright (c) 2016 Microsoft Corporation
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
// Source taken from https://github.com/microsoft/MixedRealityCompanionKit
#pragma once
#include <wrl.h>
#include <wrl\async.h>
#include <Windows.System.Threading.h>
#include <functional>
template <typename TDelegate, typename TOperation, typename TLambda>
HRESULT StartAsyncThen(_In_ TOperation* pOperation, _In_ TLambda&& tFunc)
{
if (nullptr == pOperation)
{
return E_INVALIDARG;
}
auto spCallback = Microsoft::WRL::Callback<TDelegate>(
[tFunc](_In_ TOperation* pOperation, _In_ AsyncStatus status) -> HRESULT
{
HRESULT hr = S_OK;
// wrap the operation
if (status != AsyncStatus::Completed)
{
Microsoft::WRL::ComPtr<TOperation> spOperation(pOperation);
Microsoft::WRL::ComPtr<IAsyncInfo> spAsyncInfo;
hr = spOperation.As(&spAsyncInfo);
if (SUCCEEDED(hr))
{
spAsyncInfo->get_ErrorCode(&hr);
}
}
return tFunc(hr, pOperation, status);
});
// start
return (nullptr != spCallback) ? pOperation->put_Completed(spCallback.Get()) : E_OUTOFMEMORY;
}
template <typename TLambda>
HRESULT StartAsyncThen(_In_ ABI::Windows::Foundation::IAsyncAction* pOperation, _In_ TLambda&& tFunc)
{
return StartAsyncThen<ABI::Windows::Foundation::IAsyncActionCompletedHandler, ABI::Windows::Foundation::IAsyncAction>(pOperation, static_cast<TLambda&&>(tFunc));
}
template <typename TProgress, typename TLambda>
HRESULT StartAsyncThen(_In_ ABI::Windows::Foundation::IAsyncActionWithProgress<TProgress>* pOperation, _In_ TLambda&& tFunc)
{
return StartAsyncThen<ABI::Windows::Foundation::IAsyncActionWithProgressCompletedHandler<TProgress>, Windows::Foundation::IAsyncActionWithProgress<TProgress>>(pOperation, static_cast<TLambda&&>(tFunc));
}
template <typename TResult, typename TLambda>
HRESULT StartAsyncThen(_In_ ABI::Windows::Foundation::IAsyncOperation<TResult>* pOperation, _In_ TLambda&& tFunc)
{
return StartAsyncThen<ABI::Windows::Foundation::IAsyncOperationCompletedHandler<TResult>, ABI::Windows::Foundation::IAsyncOperation<TResult>>(pOperation, static_cast<TLambda&&>(tFunc));
}
template <typename TResult, typename TProgress, typename TLambda>
HRESULT StartAsyncThen(_In_ ABI::Windows::Foundation::IAsyncOperationWithProgress<TResult, TProgress>* pOperation, _In_ TLambda&& tFunc)
{
return StartAsyncThen<ABI::Windows::Foundation::IAsyncOperationWithProgressCompletedHandler<TResult, TProgress>, ABI::Windows::Foundation::IAsyncOperationWithProgress<TResult, TProgress>>(pOperation, static_cast<TLambda&&>(tFunc));
}
// eg. TOperation = IAsyncOperationWithProgress<UINT32, UINT32>
// eg. THandler = IAsyncOperationWithProgressCompletedHandler<UINT, UINT>
template<typename TOperation, typename THandler>
class AsyncEventDelegate
: public Microsoft::WRL::RuntimeClass
< Microsoft::WRL::RuntimeClassFlags<Microsoft::WRL::RuntimeClassType::Delegate>
, THandler
, Microsoft::WRL::FtmBase >
{
public:
AsyncEventDelegate()
: _completedEvent(CreateEventEx(nullptr, nullptr, 0, EVENT_ALL_ACCESS))
{
ComPtr<AsyncEventDelegate> spThis(this);
auto lambda = ([this, spThis](_In_ HRESULT hr, _In_ TOperation* pOperation)
{
SetEvent(_completedEvent.Get());
});
_func = std::move(lambda);
}
STDMETHOD(Invoke)(
_In_ TOperation* pOperation,
_In_ AsyncStatus status)
{
HRESULT hr = S_OK;
// if we completed successfully, then there is no need for getting hresult
if (status != AsyncStatus::Completed)
{
Microsoft::WRL::ComPtr<TOperation> spOperation(pOperation);
Microsoft::WRL::ComPtr<IAsyncInfo> spAsyncInfo;
if (SUCCEEDED(spOperation.As(&spAsyncInfo)))
{
spAsyncInfo->get_ErrorCode(&hr);
}
}
_func(hr, pOperation);
return S_OK;
}
STDMETHOD(SyncWait)(_In_ TOperation* pOperation, _In_ DWORD dwMilliseconds)
{
HRESULT hr = pOperation->put_Completed(this);
if (FAILED(hr))
{
return hr;
}
DWORD dwWait = WaitForSingleObjectEx(_completedEvent.Get(), dwMilliseconds, TRUE);
if (WAIT_IO_COMPLETION == dwWait || WAIT_OBJECT_0 == dwWait)
return S_OK;
return HRESULT_FROM_WIN32(GetLastError());
}
private:
std::function<void(HRESULT, TOperation*)> _func;
Microsoft::WRL::Wrappers::Event _completedEvent;
};
template <typename TOperation, typename THandler>
HRESULT SyncWait(_In_ TOperation* pOperation, _In_ DWORD dwMilliseconds)
{
auto spCallback = Microsoft::WRL::Make<AsyncEventDelegate<TOperation, THandler>>();
return spCallback->SyncWait(pOperation, dwMilliseconds);
}
template <typename TResult>
HRESULT SyncWait(_In_ ABI::Windows::Foundation::IAsyncAction* pOperation, _In_ DWORD dwMilliseconds = INFINITE)
{
return SyncWait<ABI::Windows::Foundation::IAsyncAction, ABI::Windows::Foundation::IAsyncActionCompletedHandler>(pOperation, dwMilliseconds);
}
template <typename TResult>
HRESULT SyncWait(_In_ ABI::Windows::Foundation::IAsyncOperation<TResult>* pOperation, _In_ DWORD dwMilliseconds = INFINITE)
{
return SyncWait<ABI::Windows::Foundation::IAsyncOperation<TResult>, ABI::Windows::Foundation::IAsyncOperationCompletedHandler<TResult>>(pOperation, dwMilliseconds);
}
template <typename TResult, typename TProgress>
HRESULT SyncWait(_In_ ABI::Windows::Foundation::IAsyncOperationWithProgress<TResult, TProgress>* pOperation, _In_ DWORD dwMilliseconds = INFINITE)
{
return SyncWait<ABI::Windows::Foundation::IAsyncOperationWithProgress<TResult, TProgress>, ABI::Windows::Foundation::IAsyncOperationWithProgressCompletedHandler<TResult, TProgress>>(pOperation, dwMilliseconds);
}