fb8dd00d59
A bunch of objects use the optimization to assign one single, unique default object to default-ctored instances, and decide on whether any given object is in 'default' state by ptr-comparing against this one unique instance. Simulating that pattern here. Change-Id: I88f7d8488d81bcf1a01ab6b63121e003b8f0ade9
146 lines
4.5 KiB
C++
146 lines
4.5 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_COW_WRAPPER_CLIENTS_HXX
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#define INCLUDED_COW_WRAPPER_CLIENTS_HXX
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#include "o3tl/cow_wrapper.hxx"
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/* Definition of Cow_Wrapper_Clients classes */
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namespace o3tltests {
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/** This is a header and a separate compilation unit on purpose -
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cow_wrapper needs destructor, copy constructor and assignment
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operator to be outline, when pimpl idiom is used
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*/
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/// test non-opaque impl type
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class cow_wrapper_client1
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{
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public:
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cow_wrapper_client1() : maImpl() {}
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explicit cow_wrapper_client1( int nVal ) : maImpl(nVal) {}
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void modify( int nVal ) { *maImpl = nVal; }
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int queryUnmodified() const { return *maImpl; }
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void makeUnique() { maImpl.make_unique(); }
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bool is_unique() const { return maImpl.is_unique(); }
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oslInterlockedCount use_count() const { return maImpl.use_count(); }
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void swap( cow_wrapper_client1& r ) { o3tl::swap(maImpl, r.maImpl); }
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bool operator==( const cow_wrapper_client1& rRHS ) const { return maImpl == rRHS.maImpl; }
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bool operator!=( const cow_wrapper_client1& rRHS ) const { return maImpl != rRHS.maImpl; }
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bool operator<( const cow_wrapper_client1& rRHS ) const { return maImpl < rRHS.maImpl; }
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private:
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o3tl::cow_wrapper< int > maImpl;
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};
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class cow_wrapper_client2_impl;
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/** test opaque impl type - need to explicitly declare lifetime
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methods
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*/
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class cow_wrapper_client2
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{
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public:
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cow_wrapper_client2();
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explicit cow_wrapper_client2( int nVal );
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~cow_wrapper_client2();
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cow_wrapper_client2( const cow_wrapper_client2& );
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cow_wrapper_client2& operator=( const cow_wrapper_client2& );
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void modify( int nVal );
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int queryUnmodified() const;
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void makeUnique();
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bool is_unique() const;
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oslInterlockedCount use_count() const;
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void swap( cow_wrapper_client2& r );
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bool operator==( const cow_wrapper_client2& rRHS ) const;
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bool operator!=( const cow_wrapper_client2& rRHS ) const;
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bool operator<( const cow_wrapper_client2& rRHS ) const;
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private:
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o3tl::cow_wrapper< cow_wrapper_client2_impl > maImpl;
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};
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/** test MT-safe cow_wrapper - basically the same as
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cow_wrapper_client2, only with different refcounting policy
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*/
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class cow_wrapper_client3
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{
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public:
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cow_wrapper_client3();
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explicit cow_wrapper_client3( int nVal );
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~cow_wrapper_client3();
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cow_wrapper_client3( const cow_wrapper_client3& );
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cow_wrapper_client3& operator=( const cow_wrapper_client3& );
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void modify( int nVal );
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int queryUnmodified() const;
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void makeUnique();
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bool is_unique() const;
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oslInterlockedCount use_count() const;
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void swap( cow_wrapper_client3& r );
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bool operator==( const cow_wrapper_client3& rRHS ) const;
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bool operator!=( const cow_wrapper_client3& rRHS ) const;
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bool operator<( const cow_wrapper_client3& rRHS ) const;
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private:
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o3tl::cow_wrapper< cow_wrapper_client2_impl, o3tl::ThreadSafeRefCountingPolicy > maImpl;
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};
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/** test default-object comparison - have default-ctored-client4 share
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the same static impl instance, check if isDefault does the right
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thing
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*/
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class cow_wrapper_client4
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{
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public:
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cow_wrapper_client4();
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explicit cow_wrapper_client4(int);
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~cow_wrapper_client4();
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cow_wrapper_client4( const cow_wrapper_client4& );
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cow_wrapper_client4& operator=( const cow_wrapper_client4& );
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bool is_default() const;
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bool operator==( const cow_wrapper_client4& rRHS ) const;
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bool operator!=( const cow_wrapper_client4& rRHS ) const;
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bool operator<( const cow_wrapper_client4& rRHS ) const;
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private:
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o3tl::cow_wrapper< int > maImpl;
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};
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} // namespace o3tltests
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#endif /* INCLUDED_COW_WRAPPER_CLIENTS_HXX */
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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