84 lines
2.3 KiB
C++
84 lines
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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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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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_COMPHELPER_WEAKBAG_HXX
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#define INCLUDED_COMPHELPER_WEAKBAG_HXX
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#include <sal/config.h>
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#include <vector>
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#include <com/sun/star/uno/Reference.h>
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#include <cppuhelper/weakref.hxx>
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#include <osl/diagnose.h>
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namespace comphelper {
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/**
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A bag of UNO weak references.
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*/
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template< typename T > class WeakBag {
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public:
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/**
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Add a new weak reference.
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The implementation keeps the amount of memory consumed linear in the
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number of living references added, not linear in the number of total
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references added.
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@param e
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a non-null reference.
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*/
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void add(css::uno::Reference< T > const & e) {
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OSL_ASSERT(e.is());
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for (auto i = m_list.begin(); i != m_list.end();) {
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if (css::uno::Reference< T >(*i).is()) {
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++i;
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} else {
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i = m_list.erase(i);
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}
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}
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m_list.push_back(css::uno::WeakReference< T >(e));
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}
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/**
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Remove a living reference.
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@return
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a living reference, or null if there are none.
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*/
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css::uno::Reference< T > remove() {
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while (!m_list.empty()) {
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css::uno::Reference< T > r(m_list.back());
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m_list.pop_back();
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if (r.is()) {
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return r;
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}
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}
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return css::uno::Reference< T >();
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}
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private:
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std::vector< css::uno::WeakReference< T > > m_list;
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};
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}
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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