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/* -*- 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 .
*/
#pragma once
#include <sal/config.h>
#include <mutex>
#include <cppuhelper/propshlp.hxx>
#include <cassert>
#include <unordered_map>
namespace comphelper
{
typedef std::unordered_map< sal_Int32, ::cppu::IPropertyArrayHelper* > OIdPropertyArrayMap;
template <class TYPE>
class OIdPropertyArrayUsageHelper
{
public:
OIdPropertyArrayUsageHelper();
virtual ~OIdPropertyArrayUsageHelper()
{
std::unique_lock aGuard(theMutex());
assert(s_nRefCount > 0 && "OIdPropertyArrayUsageHelper::~OIdPropertyArrayUsageHelper : suspicious call : have a refcount of 0 !");
if (!--s_nRefCount)
{
// delete the element
for (auto const& elem : *s_pMap)
delete elem.second;
delete s_pMap;
s_pMap = nullptr;
}
}
/** call this in the getInfoHelper method of your derived class. The method returns the array helper of the
class, which is created if necessary.
*/
::cppu::IPropertyArrayHelper* getArrayHelper(sal_Int32 nId);
protected:
/** used to implement the creation of the array helper which is shared amongst all instances of the class.
This method needs to be implemented in derived classes.
<BR>
The method gets called with Mutex acquired.
@return a pointer to the newly created array helper. Must not be NULL.
*/
virtual ::cppu::IPropertyArrayHelper* createArrayHelper(sal_Int32 nId) const = 0;
private:
static sal_Int32 s_nRefCount;
static OIdPropertyArrayMap* s_pMap;
static std::mutex& theMutex()
{
static std::mutex SINGLETON;
return SINGLETON;
}
};
template<class TYPE>
sal_Int32 OIdPropertyArrayUsageHelper< TYPE >::s_nRefCount = 0;
template<class TYPE>
OIdPropertyArrayMap* OIdPropertyArrayUsageHelper< TYPE >::s_pMap = nullptr;
template <class TYPE>
OIdPropertyArrayUsageHelper<TYPE>::OIdPropertyArrayUsageHelper()
{
std::unique_lock aGuard(theMutex());
// create the map if necessary
if (!s_pMap)
s_pMap = new OIdPropertyArrayMap;
++s_nRefCount;
}
template <class TYPE>
::cppu::IPropertyArrayHelper* OIdPropertyArrayUsageHelper<TYPE>::getArrayHelper(sal_Int32 nId)
{
assert(s_nRefCount && "OIdPropertyArrayUsageHelper::getArrayHelper : suspicious call : have a refcount of 0 !");
std::unique_lock aGuard(theMutex());
// do we have the array already?
auto& rEntry = (*s_pMap)[nId];
if (!rEntry)
{
rEntry = createArrayHelper(nId);
assert(rEntry && "OIdPropertyArrayUsageHelper::getArrayHelper : createArrayHelper returned nonsense !");
}
return (*s_pMap)[nId];
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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