naiveproxy/base/win/core_winrt_util.cc
2018-01-29 00:30:36 +08:00

61 lines
1.8 KiB
C++

// 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 <roapi.h>
namespace {
void* LoadComBaseFunction(const char* function_name) {
static HMODULE const handle = ::LoadLibrary(L"combase.dll");
return handle ? ::GetProcAddress(handle, function_name) : nullptr;
}
decltype(&::RoActivateInstance) GetRoActivateInstanceFunction() {
static decltype(&::RoActivateInstance) const function =
reinterpret_cast<decltype(&::RoActivateInstance)>(
LoadComBaseFunction("RoActivateInstance"));
return function;
}
decltype(&::RoGetActivationFactory) GetRoGetActivationFactoryFunction() {
static decltype(&::RoGetActivationFactory) const function =
reinterpret_cast<decltype(&::RoGetActivationFactory)>(
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) {
decltype(&::RoGetActivationFactory) 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) {
decltype(&::RoActivateInstance) activate_instance_func =
GetRoActivateInstanceFunction();
if (!activate_instance_func)
return E_FAIL;
return activate_instance_func(class_id, instance);
}
} // namespace win
} // namespace base