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Diffstat (limited to 'include/com/sun/star/uno/Reference.h')
| -rw-r--r-- | include/com/sun/star/uno/Reference.h | 571 |
1 files changed, 571 insertions, 0 deletions
diff --git a/include/com/sun/star/uno/Reference.h b/include/com/sun/star/uno/Reference.h new file mode 100644 index 000000000..85c0d929e --- /dev/null +++ b/include/com/sun/star/uno/Reference.h @@ -0,0 +1,571 @@ +/* -*- 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 . + */ + +/* + * This file is part of LibreOffice published API. + */ +#ifndef INCLUDED_COM_SUN_STAR_UNO_REFERENCE_H +#define INCLUDED_COM_SUN_STAR_UNO_REFERENCE_H + +#include "sal/config.h" + +#include <cassert> +#include <cstddef> + +#if defined LIBO_INTERNAL_ONLY +#include <type_traits> +#endif + +#include "rtl/alloc.h" + +namespace com +{ +namespace sun +{ +namespace star +{ +namespace uno +{ + +class RuntimeException; +class XInterface; +class Type; +class Any; + +/** Enum defining UNO_REF_NO_ACQUIRE for setting reference without acquiring a given interface. + Deprecated, please use SAL_NO_ACQUIRE. + @deprecated +*/ +enum UnoReference_NoAcquire +{ + /** This enum value can be used for creating a reference granting a given interface, + i.e. transferring ownership to it. + */ + UNO_REF_NO_ACQUIRE +}; + +/** This base class serves as a base class for all template reference classes and + has been introduced due to compiler problems with templated operators ==, =!. +*/ +class BaseReference +{ +protected: + /** the interface pointer + */ + XInterface * _pInterface; + + /** Queries given interface for type rType. + + @param pInterface interface pointer + @param rType interface type + @return interface of demanded type (may be null) + */ + inline static XInterface * SAL_CALL iquery( XInterface * pInterface, const Type & rType ); + /** Queries given interface for type rType. + Throws a RuntimeException if the demanded interface cannot be queried. + + @param pInterface interface pointer + @param rType interface type + @return interface of demanded type + */ + inline static XInterface * SAL_CALL iquery_throw( XInterface * pInterface, const Type & rType ); + +public: + /** Gets interface pointer. This call does not acquire the interface. + + @return UNacquired interface pointer + */ + XInterface * SAL_CALL get() const + { return _pInterface; } + + /** Checks if reference is null. + + @return true if reference acquires an interface, i.e. true if it is not null + */ + bool SAL_CALL is() const + { return (NULL != _pInterface); } + +#if defined LIBO_INTERNAL_ONLY + /** Checks if reference is null. + + @return true if reference acquires an interface, i.e. true if it is not null + */ + explicit operator bool() const + { return is(); } +#endif + + /** Equality operator: compares two interfaces + Checks if both references are null or refer to the same object. + + @param pInterface another interface + @return true if both references are null or refer to the same object, false otherwise + */ + inline bool SAL_CALL operator == ( XInterface * pInterface ) const; + /** Inequality operator: compares two interfaces + Checks if both references are null or refer to the same object. + + @param pInterface another interface + @return false if both references are null or refer to the same object, true otherwise + */ + inline bool SAL_CALL operator != ( XInterface * pInterface ) const; + + /** Equality operator: compares two interfaces + Checks if both references are null or refer to the same object. + + @param rRef another reference + @return true if both references are null or refer to the same object, false otherwise + */ + inline bool SAL_CALL operator == ( const BaseReference & rRef ) const; + /** Inequality operator: compares two interfaces + Checks if both references are null or refer to the same object. + + @param rRef another reference + @return false if both references are null or refer to the same object, true otherwise + */ + inline bool SAL_CALL operator != ( const BaseReference & rRef ) const; + + /** Needed by some STL containers. + + @param rRef another reference + @return true, if this reference is less than rRef + */ + inline bool SAL_CALL operator < ( const BaseReference & rRef ) const; +}; + +/** Enum defining UNO_QUERY for implicit interface query. +*/ +enum UnoReference_Query +{ + /** This enum value can be used for implicit interface query. + */ + UNO_QUERY +}; +/** Enum defining UNO_QUERY_THROW for implicit interface query. + If the demanded interface is unavailable, then a RuntimeException is thrown. +*/ +enum UnoReference_QueryThrow +{ + /** This enum value can be used for implicit interface query. + */ + UNO_QUERY_THROW +}; +/** Enum defining UNO_SET_THROW for throwing if attempts are made to assign a null + interface + + @since UDK 3.2.8 +*/ +enum UnoReference_SetThrow +{ + UNO_SET_THROW +}; + +/** Template reference class for interface type derived from BaseReference. + A special constructor given the UNO_QUERY identifier queries interfaces + for reference type. +*/ +template< class interface_type > +class SAL_DLLPUBLIC_RTTI Reference : public BaseReference +{ + /** Queries given interface for type interface_type. + + @param pInterface interface pointer + @return interface of demanded type (may be null) + */ + inline static XInterface * SAL_CALL iquery( XInterface * pInterface ); + /** Queries given interface for type interface_type. + Throws a RuntimeException if the demanded interface cannot be queried. + + @param pInterface interface pointer + @return interface of demanded type + */ + inline static XInterface * SAL_CALL iquery_throw( XInterface * pInterface ); + /** Returns the given interface if it is not <NULL/>, throws a RuntimeException otherwise. + + @param pInterface interface pointer + @return pInterface + */ + inline static interface_type * SAL_CALL iset_throw( interface_type * pInterface ); + + /** Cast from an "interface pointer" (e.g., BaseReference::_pInterface) to a + pointer to this interface_type. + + To work around ambiguities in the case of multiple-inheritance interface + types (which inherit XInterface more than once), use reinterpret_cast + (resp. a sequence of two static_casts, to avoid warnings about + reinterpret_cast used between related classes) to switch from a pointer + to XInterface to a pointer to this derived interface_type. In + principle, this is not guaranteed to work. In practice, it seems to + work on all supported platforms. + */ + static interface_type * castFromXInterface(XInterface * p) { + return static_cast< interface_type * >(static_cast< void * >(p)); + } + + /** Cast from a pointer to this interface_type to an "interface pointer" + (e.g., BaseReference::_pInterface). + + To work around ambiguities in the case of multiple-inheritance interface + types (which inherit XInterface more than once), use reinterpret_cast + (resp. a sequence of two static_casts, to avoid warnings about + reinterpret_cast used between related classes) to switch from a pointer + to this derived interface_type to a pointer to XInterface. In + principle, this is not guaranteed to work. In practice, it seems to + work on all supported platforms. + */ + static XInterface * castToXInterface(interface_type * p) { + return static_cast< XInterface * >(static_cast< void * >(p)); + } + +public: + /// @cond INTERNAL + // these are here to force memory de/allocation to sal lib. + static void * SAL_CALL operator new ( ::size_t nSize ) + { return ::rtl_allocateMemory( nSize ); } + static void SAL_CALL operator delete ( void * pMem ) + { ::rtl_freeMemory( pMem ); } + static void * SAL_CALL operator new ( ::size_t, void * pMem ) + { return pMem; } + static void SAL_CALL operator delete ( void *, void * ) + {} + /// @endcond + + /** Destructor: Releases interface if set. + */ + inline ~Reference() COVERITY_NOEXCEPT_FALSE; + + /** Default Constructor: Sets null reference. + */ + inline Reference(); + + /** Copy constructor: Copies interface reference. + + @param rRef another reference + */ + inline Reference( const Reference< interface_type > & rRef ); + +#if defined LIBO_INTERNAL_ONLY + /** Move constructor + + @param rRef another reference + */ + inline Reference( Reference< interface_type > && rRef ) noexcept; + + /** Up-casting conversion constructor: Copies interface reference. + + Does not work for up-casts to ambiguous bases. For the special case of + up-casting to Reference< XInterface >, see the corresponding conversion + operator. + + @param rRef another reference + */ + template< class derived_type > + inline Reference( + const Reference< derived_type > & rRef, + std::enable_if_t< + std::is_base_of_v<interface_type, derived_type> + && !std::is_same_v<interface_type, XInterface>, void *> = nullptr); +#endif + + /** Constructor: Sets given interface pointer. + + @param pInterface an interface pointer + */ + inline Reference( interface_type * pInterface ); + + /** Constructor: Sets given interface pointer without acquiring it. + + @param pInterface another reference + @param dummy SAL_NO_ACQUIRE to force obvious distinction to other constructors + */ + inline Reference( interface_type * pInterface, __sal_NoAcquire dummy); + /** Constructor: Sets given interface pointer without acquiring it. + Deprecated, please use SAL_NO_ACQUIRE version. + + @deprecated + @param pInterface another reference + @param dummy UNO_REF_NO_ACQUIRE to force obvious distinction to other constructors + */ + inline SAL_DEPRECATED("use SAL_NO_ACQUIRE version") Reference( interface_type * pInterface, UnoReference_NoAcquire dummy ); + + /** Constructor: Queries given interface for reference interface type (interface_type). + + @param rRef another reference + @param dummy UNO_QUERY to force obvious distinction to other constructors + */ + inline Reference( const BaseReference & rRef, UnoReference_Query dummy ); + /** Constructor: Queries given interface for reference interface type (interface_type). + + @param pInterface an interface pointer + @param dummy UNO_QUERY to force obvious distinction to other constructors + */ + inline Reference( XInterface * pInterface, UnoReference_Query dummy); + /** Constructor: Queries given any for reference interface type (interface_type). + + @param rAny an any + @param dummy UNO_QUERY to force obvious distinction to other constructors + */ + inline Reference( const Any & rAny, UnoReference_Query dummy); + /** Constructor: Queries given interface for reference interface type (interface_type). + Throws a RuntimeException if the demanded interface cannot be queried. + + @param rRef another reference + @param dummy UNO_QUERY_THROW to force obvious distinction + to other constructors + */ + inline Reference( const BaseReference & rRef, UnoReference_QueryThrow dummy ); +#ifdef LIBO_INTERNAL_ONLY + /** + Prevent code from calling the QUERY_THROW constructor, when they meant to use the SET_THROW constructor. + */ + Reference( const Reference< interface_type > & rRef, UnoReference_QueryThrow dummy ) = delete; +#endif + /** Constructor: Queries given interface for reference interface type (interface_type). + Throws a RuntimeException if the demanded interface cannot be queried. + + @param pInterface an interface pointer + @param dummy UNO_QUERY_THROW to force obvious distinction + to other constructors + */ + inline Reference( XInterface * pInterface, UnoReference_QueryThrow dummy ); + /** Constructor: Queries given any for reference interface type (interface_type). + Throws a RuntimeException if the demanded interface cannot be queried. + + @param rAny an any + @param dummy UNO_QUERY_THROW to force obvious distinction + to other constructors + */ + inline Reference( const Any & rAny, UnoReference_QueryThrow dummy ); + /** Constructor: assigns from the given interface of the same type. Throws a RuntimeException + if the source interface is NULL. + + @param rRef another interface reference of the same type + @param dummy UNO_SET_THROW to distinguish from default copy constructor + + @since UDK 3.2.8 + */ + inline Reference( const Reference< interface_type > & rRef, UnoReference_SetThrow dummy ); + /** Constructor: assigns from the given interface of the same type. Throws a RuntimeException + if the source interface is NULL. + + @param pInterface an interface pointer + @param dummy UNO_SET_THROW to distinguish from default assignment constructor + + @since UDK 3.2.8 + */ + inline Reference( interface_type * pInterface, UnoReference_SetThrow dummy ); + + /** Cast operator to Reference< XInterface >: Reference objects are binary compatible and + any interface must be derived from com.sun.star.uno.XInterface. + This a useful direct cast possibility. + */ + SAL_CALL operator const Reference< XInterface > & () const + { return * reinterpret_cast< const Reference< XInterface > * >( this ); } + + /** Dereference operator: Used to call interface methods. + + @return UNacquired interface pointer + */ + interface_type * SAL_CALL operator -> () const { + assert(_pInterface != NULL); + return castFromXInterface(_pInterface); + } + + /** Indirection operator. + + @since LibreOffice 6.3 + @return UNacquired interface reference + */ + interface_type & SAL_CALL operator * () const { + assert(_pInterface != NULL); + return *castFromXInterface(_pInterface); + } + + /** Gets interface pointer. This call does not acquire the interface. + + @return UNacquired interface pointer + */ + interface_type * SAL_CALL get() const + { return castFromXInterface(_pInterface); } + + /** Clears reference, i.e. releases interface. Reference is null after clear() call. + */ + inline void SAL_CALL clear(); + + /** Sets the given interface. An interface already set will be released. + + @param rRef another reference + @return true, if non-null interface was set + */ + inline bool SAL_CALL set( const Reference< interface_type > & rRef ); + /** Sets the given interface. An interface already set will be released. + + @param pInterface another interface + @return true, if non-null interface was set + */ + inline bool SAL_CALL set( interface_type * pInterface ); + + /** Sets interface pointer without acquiring it. An interface already set will be released. + + @param pInterface an interface pointer + @param dummy SAL_NO_ACQUIRE to force obvious distinction to set methods + @return true, if non-null interface was set + */ + inline bool SAL_CALL set( interface_type * pInterface, __sal_NoAcquire dummy); + /** Sets interface pointer without acquiring it. An interface already set will be released. + Deprecated, please use SAL_NO_ACQUIRE version. + + @deprecated + @param pInterface an interface pointer + @param dummy UNO_REF_NO_ACQUIRE to force obvious distinction to set methods + @return true, if non-null interface was set + */ + inline SAL_DEPRECATED("use SAL_NO_ACQUIRE version") bool SAL_CALL set( interface_type * pInterface, UnoReference_NoAcquire dummy); + + /** Queries given interface for reference interface type (interface_type) and sets it. + An interface already set will be released. + + @param pInterface an interface pointer + @param dummy UNO_QUERY to force obvious distinction to set methods + @return true, if non-null interface was set + */ + inline bool SAL_CALL set( XInterface * pInterface, UnoReference_Query dummy ); + /** Queries given interface for reference interface type (interface_type) and sets it. + An interface already set will be released. + + @param rRef another reference + @param dummy UNO_QUERY to force obvious distinction to set methods + @return true, if non-null interface was set + */ + inline bool SAL_CALL set( const BaseReference & rRef, UnoReference_Query dummy); + + /** Queries given any for reference interface type (interface_type) + and sets it. An interface already set will be released. + + @param rAny + an Any containing an interface + @param dummy + UNO_QUERY to force obvious distinction + to set methods + @return + true, if non-null interface was set + */ + inline bool set( Any const & rAny, UnoReference_Query dummy ); + + /** Queries given interface for reference interface type (interface_type) and sets it. + An interface already set will be released. + Throws a RuntimeException if the demanded interface cannot be set. + + @param pInterface an interface pointer + @param dummy UNO_QUERY_THROW to force obvious distinction + to set methods + */ + inline void SAL_CALL set( XInterface * pInterface, UnoReference_QueryThrow dummy ); + /** Queries given interface for reference interface type (interface_type) and sets it. + An interface already set will be released. + Throws a RuntimeException if the demanded interface cannot be set. + + @param rRef another reference + @param dummy UNO_QUERY_THROW to force obvious distinction + to set methods + */ + inline void SAL_CALL set( const BaseReference & rRef, UnoReference_QueryThrow dummy ); +#ifdef LIBO_INTERNAL_ONLY + /** + Prevent code from calling the QUERY_THROW version, when they meant to use the SET_THROW version. + */ + void set( const Reference< interface_type > & rRef, UnoReference_QueryThrow dummy ) = delete; +#endif + + /** Queries given any for reference interface type (interface_type) and + sets it. An interface already set will be released. + Throws a RuntimeException if the demanded interface cannot be set. + + @param rAny + an Any containing an interface + @param dummy + UNO_QUERY_THROW to force obvious distinction to set methods + */ + inline void set( Any const & rAny, UnoReference_QueryThrow dummy); + /** sets the given interface + An interface already set will be released. + Throws a RuntimeException if the source interface is @b NULL. + + @param pInterface an interface pointer + @param dummy UNO_SET_THROW to force obvious distinction to other set methods + + @since UDK 3.2.8 + */ + inline void SAL_CALL set( interface_type * pInterface, UnoReference_SetThrow dummy); + /** sets the given interface + An interface already set will be released. + Throws a RuntimeException if the source interface is @b NULL. + + @param rRef an interface reference + @param dummy UNO_SET_THROW to force obvious distinction to other set methods + + @since UDK 3.2.8 + */ + inline void SAL_CALL set( const Reference< interface_type > & rRef, UnoReference_SetThrow dummy); + + + /** Assignment operator: Acquires given interface pointer and sets reference. + An interface already set will be released. + + @param pInterface an interface pointer + @return this reference + */ + inline Reference< interface_type > & SAL_CALL operator = ( interface_type * pInterface ); + /** Assignment operator: Acquires given interface reference and sets reference. + An interface already set will be released. + + @param rRef an interface reference + @return this reference + */ + inline Reference< interface_type > & SAL_CALL operator = ( const Reference< interface_type > & rRef ); +#if defined LIBO_INTERNAL_ONLY + /** Assignment move operator: Acquires given interface reference and sets reference. + An interface already set will be released. + + @param rRef an interface reference + @return this reference + */ + inline Reference< interface_type > & operator = ( Reference< interface_type > && rRef ) noexcept; +#endif + /** Queries given interface reference for type interface_type. + + @param rRef interface reference + @return interface reference of demanded type (may be null) + */ + SAL_WARN_UNUSED_RESULT inline static Reference< interface_type > SAL_CALL query( const BaseReference & rRef ); + /** Queries given interface for type interface_type. + + @param pInterface interface pointer + @return interface reference of demanded type (may be null) + */ + SAL_WARN_UNUSED_RESULT inline static Reference< interface_type > SAL_CALL query( XInterface * pInterface ); +}; + +} +} +} +} + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |