58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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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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*/
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#pragma once
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#if defined _WIN32
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#include <prewin.h>
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// for CoInitializeEx / CoUninitialize
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#include <combaseapi.h>
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#include <postwin.h>
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// for std::abort
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#include <cstdlib>
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namespace o3tl
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{
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// Helpers for safe calls to CoInitializeEx and CoUninitialize in MSVC
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// Indeed if a thread has been already initialized with a concurrency model
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// (in LO case COINIT_APARTMENTTHREADED or COINIT_MULTITHREADED)
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// CoInitializeEx can't succeed without calling first CoUninitialize
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// also, CoUninitialize must be called the number of times CoInitializeEx has been called
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inline HRESULT safeCoInitializeEx(DWORD dwCoInit, int& nbReinit)
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{
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HRESULT hr;
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while ((hr = CoInitializeEx(nullptr, dwCoInit)) == RPC_E_CHANGED_MODE)
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{
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// so we're in RPC_E_CHANGED_MODE case
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// the pb was it was already initialized with a different concurrency model
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// close this init
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CoUninitialize();
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// and increment counter for dtr part
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++nbReinit;
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// and keep on the loop if there were multi initializations
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}
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if (FAILED(hr))
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std::abort();
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return hr;
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}
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inline void safeCoUninitializeReinit(DWORD dwCoInit, int nbReinit)
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{
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CoUninitialize();
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// Put back all the inits, if there were, before the use of the caller to safeCoInitializeEx
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for (int i = 0; i < nbReinit; ++i)
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CoInitializeEx(nullptr, dwCoInit);
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}
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}
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
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