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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:06:44 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:06:44 +0000 |
commit | ed5640d8b587fbcfed7dd7967f3de04b37a76f26 (patch) | |
tree | 7a5f7c6c9d02226d7471cb3cc8fbbf631b415303 /dbaccess/source/ui/browser/AsynchronousLink.cxx | |
parent | Initial commit. (diff) | |
download | libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.tar.xz libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.zip |
Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | dbaccess/source/ui/browser/AsynchronousLink.cxx | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/dbaccess/source/ui/browser/AsynchronousLink.cxx b/dbaccess/source/ui/browser/AsynchronousLink.cxx new file mode 100644 index 000000000..e4dcdb2f9 --- /dev/null +++ b/dbaccess/source/ui/browser/AsynchronousLink.cxx @@ -0,0 +1,81 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * 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/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include <dbaccess/AsynchronousLink.hxx> +#include <vcl/svapp.hxx> + +// OAsynchronousLink +using namespace dbaui; +OAsynchronousLink::OAsynchronousLink(const Link<void*, void>& _rHandler) + : m_aHandler(_rHandler) + , m_nEventId(nullptr) +{ +} + +OAsynchronousLink::~OAsynchronousLink() +{ + { + ::osl::MutexGuard aEventGuard(m_aEventSafety); + if (m_nEventId) + Application::RemoveUserEvent(m_nEventId); + m_nEventId = nullptr; + } + + { + ::osl::MutexGuard aDestructionGuard(m_aDestructionSafety); + // this is just for the case we're deleted while another thread just handled the event : + // if this other thread called our link while we were deleting the event here, the + // link handler blocked. With leaving the above block it continued, but now we are prevented + // to leave this destructor 'til the link handler recognizes that nEvent == 0 and leaves. + } +} + +void OAsynchronousLink::Call(void* _pArgument) +{ + ::osl::MutexGuard aEventGuard(m_aEventSafety); + if (m_nEventId) + Application::RemoveUserEvent(m_nEventId); + m_nEventId = Application::PostUserEvent(LINK(this, OAsynchronousLink, OnAsyncCall), _pArgument); +} + +void OAsynchronousLink::CancelCall() +{ + ::osl::MutexGuard aEventGuard(m_aEventSafety); + if (m_nEventId) + Application::RemoveUserEvent(m_nEventId); + m_nEventId = nullptr; +} + +IMPL_LINK(OAsynchronousLink, OnAsyncCall, void*, _pArg, void) +{ + { + ::osl::MutexGuard aDestructionGuard(m_aDestructionSafety); + { + ::osl::MutexGuard aEventGuard(m_aEventSafety); + if (!m_nEventId) + // our destructor deleted the event just while we are waiting for m_aEventSafety + // -> get outta here + return; + m_nEventId = nullptr; + } + } + m_aHandler.Call(_pArg); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |