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| author | Julien Nabet <serval2412@yahoo.fr> | 2020-06-04 12:27:39 +0200 |
|---|---|---|
| committer | Julien Nabet <serval2412@yahoo.fr> | 2020-06-05 15:31:48 +0200 |
| commit | 08e02ae9606f6cb7ef49745ebe177089ed6d39fa (patch) | |
| tree | 5ea634d7cc258a62ccaf1558f3f5ded0b9efa7f3 /include/o3tl | |
| parent | Upcoming loplugin:elidestringvar: test (diff) | |
| download | core-08e02ae9606f6cb7ef49745ebe177089ed6d39fa.tar.gz core-08e02ae9606f6cb7ef49745ebe177089ed6d39fa.zip | |
Improve COM library management in fpicker
Inspired from:
author Julien Nabet <serval2412@yahoo.fr> 2020-05-29 23:58:59 +0200
committer Mike Kaganski <mike.kaganski@collabora.com> 2020-06-03 23:04:27 +0200
commit 95e5d37b6e62eb39f2d5337e124e86b3d0c3f399 (patch)
tree 5488826b390c04a2b32d2f9aa43f49a64f52db3d
parent 3d3cb4328ece843b3e31b8411f9d16bbedb57a7b (diff)
Improve COM library management in ADO
Change-Id: If0b136cdcc89baa6bc90912d42b3ba07fa6c0efb
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/95498
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
Tested-by: Jenkins
Diffstat (limited to 'include/o3tl')
| -rw-r--r-- | include/o3tl/safeCoInitUninit.hxx | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/include/o3tl/safeCoInitUninit.hxx b/include/o3tl/safeCoInitUninit.hxx new file mode 100644 index 000000000000..0ceb4a9746a2 --- /dev/null +++ b/include/o3tl/safeCoInitUninit.hxx @@ -0,0 +1,58 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + */ + +#pragma once + +#if defined _WIN32 +#include <prewin.h> + +// for CoInitializeEx / CoUninitialize +#include <combaseapi.h> + +#include <postwin.h> + +// for std::abort +#include <cstdlib> + +namespace o3tl +{ +// Helpers for safe calls to CoInitializeEx and CoUninitialize in MSVC +// Indeed if a thread has been already initialized with a concurrency model +// (in LO case COINIT_APARTMENTTHREADED or COINIT_MULTITHREADED) +// CoInitializeEx can't succeed without calling first CoUninitialize +// also, CoUninitialize must be called the number of times CoInitializeEx has been called +inline HRESULT safeCoInitializeEx(DWORD dwCoInit, int& nbReinit) +{ + HRESULT hr; + while ((hr = CoInitializeEx(nullptr, dwCoInit)) == RPC_E_CHANGED_MODE) + { + // so we're in RPC_E_CHANGED_MODE case + // the pb was it was already initialized with a different concurrency model + // close this init + CoUninitialize(); + // and increment counter for dtr part + ++nbReinit; + + // and keep on the loop if there were multi initializations + } + if (FAILED(hr)) + std::abort(); + return hr; +} + +inline void safeCoUninitializeReinit(DWORD dwCoInit, int nbReinit) +{ + CoUninitialize(); + // Put back all the inits, if there were, before the use of the caller to safeCoInitializeEx + for (int i = 0; i < nbReinit; ++i) + CoInitializeEx(nullptr, dwCoInit); +} +} +#endif +/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */ |