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/*
* Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef RTC_BASE_WIN_GET_ACTIVATION_FACTORY_H_
#define RTC_BASE_WIN_GET_ACTIVATION_FACTORY_H_
#include <winerror.h>
#include "rtc_base/win/hstring.h"
namespace webrtc {
// Provides access to Core WinRT functions which may not be available on
// Windows 7. Loads functions dynamically at runtime to prevent library
// dependencies.
// Callers must check the return value of ResolveCoreWinRTDelayLoad() before
// using these functions.
bool ResolveCoreWinRTDelayload();
HRESULT RoGetActivationFactoryProxy(HSTRING class_id,
const IID& iid,
void** out_factory);
// Retrieves an activation factory for the type specified.
template <typename InterfaceType, wchar_t const* runtime_class_id>
HRESULT GetActivationFactory(InterfaceType** factory) {
HSTRING class_id_hstring;
HRESULT hr = CreateHstring(runtime_class_id, wcslen(runtime_class_id),
&class_id_hstring);
if (FAILED(hr))
return hr;
hr = RoGetActivationFactoryProxy(class_id_hstring, IID_PPV_ARGS(factory));
if (FAILED(hr)) {
DeleteHstring(class_id_hstring);
return hr;
}
return DeleteHstring(class_id_hstring);
}
} // namespace webrtc
#endif // RTC_BASE_WIN_GET_ACTIVATION_FACTORY_H_