зеркало из https://github.com/mozilla/gecko-dev.git
95 строки
2.3 KiB
C++
95 строки
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// We need Windows 7 headers
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#ifdef NTDDI_VERSION
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#undef NTDDI_VERSION
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#endif
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#define NTDDI_VERSION 0x06010000
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#ifdef _WIN32_WINNT
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#undef _WIN32_WINNT
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#endif
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#define _WIN32_WINNT 0x0601
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#include "DynamicallyLinkedFunctionPtr.h"
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#include "mozilla/mscom/Utils.h"
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#include "mozilla/RefPtr.h"
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#include <objidl.h>
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static bool
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IsCurrentThreadMTALegacy()
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{
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// We don't use RefPtr for token because CoGetContextToken does *not*
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// increment its refcount!
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IUnknown* token = nullptr;
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HRESULT hr =
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CoGetContextToken(reinterpret_cast<ULONG_PTR*>(&token));
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if (FAILED(hr)) {
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return false;
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}
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RefPtr<IComThreadingInfo> threadingInfo;
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hr = token->QueryInterface(IID_IComThreadingInfo,
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getter_AddRefs(threadingInfo));
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if (FAILED(hr)) {
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return false;
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}
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APTTYPE aptType;
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hr = threadingInfo->GetCurrentApartmentType(&aptType);
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if (FAILED(hr)) {
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return false;
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}
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return aptType == APTTYPE_MTA;
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}
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namespace mozilla {
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namespace mscom {
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bool
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IsCurrentThreadMTA()
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{
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static DynamicallyLinkedFunctionPtr<decltype(&::CoGetApartmentType)>
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pCoGetApartmentType(L"ole32.dll", "CoGetApartmentType");
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if (!pCoGetApartmentType) {
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// XP and Vista do not expose the newer API.
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return IsCurrentThreadMTALegacy();
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}
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APTTYPE aptType;
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APTTYPEQUALIFIER aptTypeQualifier;
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HRESULT hr = pCoGetApartmentType(&aptType, &aptTypeQualifier);
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if (FAILED(hr)) {
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return false;
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}
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return aptType == APTTYPE_MTA;
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}
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bool
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IsProxy(IUnknown* aUnknown)
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{
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if (!aUnknown) {
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return false;
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}
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// Only proxies implement this interface, so if it is present then we must
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// be dealing with a proxied object.
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RefPtr<IClientSecurity> clientSecurity;
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HRESULT hr = aUnknown->QueryInterface(IID_IClientSecurity,
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(void**)getter_AddRefs(clientSecurity));
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if (SUCCEEDED(hr) || hr == RPC_E_WRONG_THREAD) {
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return true;
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}
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return false;
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}
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} // namespace mscom
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} // namespace mozilla
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