// Copyright 2017 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "base/win/core_winrt_util.h" #include "base/threading/scoped_thread_priority.h" namespace { FARPROC LoadComBaseFunction(const char* function_name) { static HMODULE const handle = []() { // Mitigate the issues caused by loading DLLs on a background thread // (http://crbug/973868). SCOPED_MAY_LOAD_LIBRARY_AT_BACKGROUND_PRIORITY(); return ::LoadLibraryEx(L"combase.dll", nullptr, LOAD_LIBRARY_SEARCH_SYSTEM32); }(); return handle ? ::GetProcAddress(handle, function_name) : nullptr; } decltype(&::RoActivateInstance) GetRoActivateInstanceFunction() { static decltype(&::RoActivateInstance) const function = reinterpret_cast( LoadComBaseFunction("RoActivateInstance")); return function; } decltype(&::RoGetActivationFactory) GetRoGetActivationFactoryFunction() { static decltype(&::RoGetActivationFactory) const function = reinterpret_cast( LoadComBaseFunction("RoGetActivationFactory")); return function; } } // namespace namespace base { namespace win { bool ResolveCoreWinRTDelayload() { // TODO(finnur): Add AssertIOAllowed once crbug.com/770193 is fixed. return GetRoActivateInstanceFunction() && GetRoGetActivationFactoryFunction(); } HRESULT RoGetActivationFactory(HSTRING class_id, const IID& iid, void** out_factory) { auto get_factory_func = GetRoGetActivationFactoryFunction(); if (!get_factory_func) return E_FAIL; return get_factory_func(class_id, iid, out_factory); } HRESULT RoActivateInstance(HSTRING class_id, IInspectable** instance) { auto activate_instance_func = GetRoActivateInstanceFunction(); if (!activate_instance_func) return E_FAIL; return activate_instance_func(class_id, instance); } } // namespace win } // namespace base