ad686b26ce
Change-Id: I6eb9f0431a9402479a2d90d5b6f68b611d52a9f9 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/175957 Tested-by: Jenkins Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
747 lines
21 KiB
C++
747 lines
21 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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#ifdef DISABLE_DYNLOADING
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#include <config_java.h>
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#endif
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#include "IdentityMapping.hxx"
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#include <cassert>
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#include <mutex>
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#include <set>
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#include <unordered_map>
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#include <utility>
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#include <rtl/ustring.hxx>
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#include <rtl/ustrbuf.hxx>
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#include <osl/module.hxx>
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#include <osl/diagnose.h>
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#include <osl/mutex.hxx>
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#include <osl/interlck.h>
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#include <sal/log.hxx>
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#include <uno/dispatcher.h>
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#include <uno/mapping.h>
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#include <uno/lbnames.h>
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#include <uno/environment.hxx>
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#include <typelib/typedescription.h>
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#include <cppu/EnvDcp.hxx>
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#include "cascade_mapping.hxx"
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#include "loadmodule.hxx"
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using namespace osl;
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using namespace com::sun::star::uno;
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namespace cppu
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{
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namespace {
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class Mapping
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{
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uno_Mapping * _pMapping;
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public:
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inline explicit Mapping( uno_Mapping * pMapping = nullptr );
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inline Mapping( const Mapping & rMapping );
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Mapping(Mapping && other) noexcept : _pMapping(other._pMapping)
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{ other._pMapping = nullptr; }
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inline ~Mapping();
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inline Mapping & operator = ( uno_Mapping * pMapping );
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// move variant is sufficient
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Mapping & operator = ( const Mapping & rMapping ) = delete;
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Mapping & operator =(Mapping && other) noexcept {
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if (_pMapping != nullptr) {
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(*_pMapping->release)(_pMapping);
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}
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_pMapping = other._pMapping;
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other._pMapping = nullptr;
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return *this;
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}
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uno_Mapping * get() const
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{ return _pMapping; }
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bool is() const
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{ return (_pMapping != nullptr); }
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};
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}
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inline Mapping::Mapping( uno_Mapping * pMapping )
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: _pMapping( pMapping )
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{
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if (_pMapping)
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(*_pMapping->acquire)( _pMapping );
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}
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inline Mapping::Mapping( const Mapping & rMapping )
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: _pMapping( rMapping._pMapping )
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{
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if (_pMapping)
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(*_pMapping->acquire)( _pMapping );
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}
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inline Mapping::~Mapping()
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{
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if (_pMapping)
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(*_pMapping->release)( _pMapping );
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}
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inline Mapping & Mapping::operator = ( uno_Mapping * pMapping )
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{
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if (pMapping)
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(*pMapping->acquire)( pMapping );
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if (_pMapping)
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(*_pMapping->release)( _pMapping );
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_pMapping = pMapping;
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return *this;
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}
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namespace {
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struct MappingEntry
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{
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sal_Int32 nRef;
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uno_Mapping * pMapping;
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uno_freeMappingFunc freeMapping;
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OUString aMappingName;
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MappingEntry(
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uno_Mapping * pMapping_, uno_freeMappingFunc freeMapping_,
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OUString aMappingName_ )
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: nRef( 1 )
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, pMapping( pMapping_ )
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, freeMapping( freeMapping_ )
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, aMappingName(std::move( aMappingName_ ))
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{}
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};
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struct FctPtrHash
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{
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size_t operator()( uno_Mapping * pKey ) const
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{ return reinterpret_cast<size_t>(pKey); }
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};
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}
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typedef std::unordered_map<
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OUString, MappingEntry * > t_OUString2Entry;
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typedef std::unordered_map<
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uno_Mapping *, MappingEntry *, FctPtrHash > t_Mapping2Entry;
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namespace {
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struct MappingsData
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{
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Mutex aMappingsMutex;
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t_OUString2Entry aName2Entry;
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t_Mapping2Entry aMapping2Entry;
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std::mutex aCallbacksMutex;
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std::set< uno_getMappingFunc >
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aCallbacks;
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std::mutex aNegativeLibsMutex;
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std::set<OUString> aNegativeLibs;
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};
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}
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static MappingsData & getMappingsData()
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{
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//TODO This memory is leaked; see #i63473# for when this should be
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// changed again:
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static MappingsData * s_p(new MappingsData);
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return *s_p;
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}
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namespace {
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/**
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* This class mediates two different mapping via uno, e.g. form any language to uno,
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* then from uno to any other language.
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*/
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struct uno_Mediate_Mapping : public uno_Mapping
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{
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sal_Int32 nRef;
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Environment aFrom;
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Environment aTo;
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Mapping aFrom2Uno;
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Mapping aUno2To;
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OUString aAddPurpose;
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uno_Mediate_Mapping(
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Environment aFrom_, Environment aTo_,
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Mapping aFrom2Uno_, Mapping aUno2To_,
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OUString aAddPurpose );
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};
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}
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extern "C"
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{
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static void mediate_free( uno_Mapping * pMapping )
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{
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delete static_cast< uno_Mediate_Mapping * >( pMapping );
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}
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static void mediate_acquire( uno_Mapping * pMapping )
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{
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if (1 == osl_atomic_increment(
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& static_cast< uno_Mediate_Mapping * >( pMapping )->nRef ))
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{
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uno_registerMapping(
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&pMapping, mediate_free,
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static_cast< uno_Mediate_Mapping * >( pMapping )->aFrom.get(),
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static_cast< uno_Mediate_Mapping * >( pMapping )->aTo.get(),
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static_cast< uno_Mediate_Mapping * >( pMapping )->aAddPurpose.pData );
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}
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}
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static void mediate_release( uno_Mapping * pMapping )
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{
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if (! osl_atomic_decrement(
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& static_cast< uno_Mediate_Mapping * >( pMapping )->nRef ))
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{
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uno_revokeMapping( pMapping );
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}
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}
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static void mediate_mapInterface(
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uno_Mapping * pMapping,
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void ** ppOut, void * pInterface,
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typelib_InterfaceTypeDescription * pInterfaceTypeDescr )
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{
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OSL_ENSURE( pMapping && ppOut, "### null ptr!" );
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if (!(pMapping && ppOut))
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return;
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uno_Mediate_Mapping * that = static_cast< uno_Mediate_Mapping * >( pMapping );
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uno_Mapping * pFrom2Uno = that->aFrom2Uno.get();
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uno_Interface * pUnoI = nullptr;
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(*pFrom2Uno->mapInterface)( pFrom2Uno, reinterpret_cast<void **>(&pUnoI), pInterface, pInterfaceTypeDescr );
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if (nullptr == pUnoI)
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{
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void * pOut = *ppOut;
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if (nullptr != pOut)
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{
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uno_ExtEnvironment * pTo = that->aTo.get()->pExtEnv;
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OSL_ENSURE( nullptr != pTo, "### cannot release out interface: leaking!" );
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if (nullptr != pTo)
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(*pTo->releaseInterface)( pTo, pOut );
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*ppOut = nullptr; // set to 0 anyway, because mapping was not successful!
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}
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}
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else
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{
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uno_Mapping * pUno2To = that->aUno2To.get();
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(*pUno2To->mapInterface)( pUno2To, ppOut, pUnoI, pInterfaceTypeDescr );
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(*pUnoI->release)( pUnoI );
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}
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}
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}
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uno_Mediate_Mapping::uno_Mediate_Mapping(
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Environment aFrom_, Environment aTo_,
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Mapping aFrom2Uno_, Mapping aUno2To_,
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OUString aAddPurpose_ )
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: nRef( 1 )
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, aFrom(std::move( aFrom_ ))
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, aTo(std::move( aTo_ ))
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, aFrom2Uno(std::move( aFrom2Uno_ ))
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, aUno2To(std::move( aUno2To_ ))
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, aAddPurpose(std::move( aAddPurpose_ ))
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{
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uno_Mapping::acquire = mediate_acquire;
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uno_Mapping::release = mediate_release;
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uno_Mapping::mapInterface = mediate_mapInterface;
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}
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static OUString getMappingName(
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const Environment & rFrom, const Environment & rTo, std::u16string_view rAddPurpose )
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{
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return
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OUString::Concat(rAddPurpose)
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+ ";"
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+ rFrom.getTypeName()
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+ "["
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+ OUString::number( reinterpret_cast< sal_IntPtr >(rFrom.get()), 16 )
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+ "];"
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+ rTo.getTypeName()
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+ "["
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+ OUString::number( reinterpret_cast< sal_IntPtr >(rTo.get()), 16 )
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+ "]";
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}
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static OUString getBridgeName(
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const Environment & rFrom, const Environment & rTo, std::u16string_view rAddPurpose )
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{
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OUStringBuffer aBridgeName( 16 );
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if (!rAddPurpose.empty())
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{
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aBridgeName.append( OUString::Concat(rAddPurpose) + "_" );
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}
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aBridgeName.append(
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EnvDcp::getTypeName(rFrom.getTypeName())
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+ "_"
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+ EnvDcp::getTypeName(rTo.getTypeName()) );
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return aBridgeName.makeStringAndClear();
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}
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#ifndef DISABLE_DYNLOADING
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static void setNegativeBridge( const OUString & rBridgeName )
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{
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MappingsData & rData = getMappingsData();
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std::scoped_lock aGuard( rData.aNegativeLibsMutex );
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rData.aNegativeLibs.insert( rBridgeName );
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}
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#endif
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#ifdef DISABLE_DYNLOADING
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static uno_ext_getMappingFunc selectMapFunc( const OUString & rBridgeName )
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{
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if (rBridgeName.equalsAscii( CPPU_CURRENT_LANGUAGE_BINDING_NAME "_uno" ))
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return CPPU_ENV_uno_ext_getMapping;
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#if HAVE_FEATURE_JAVA
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if (rBridgeName.equalsAscii( "java" "_uno" ))
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return java_uno_ext_getMapping;
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#endif
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#if 0
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// I don't think the affine or log bridges will be needed on any
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// DISABLE_DYNLOADING platform (iOS at least, possibly Android), but if
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// somebody wants to experiment, need to find out then whether these are
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// needed.
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if (rBridgeName.equalsAscii( "affine_uno_uno" ))
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return affine_uno_uno_ext_getMapping;
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if (rBridgeName.equalsAscii( "log_uno_uno" ))
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return log_uno_uno_ext_getMapping;
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#endif
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return 0;
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}
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#else
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static bool loadModule(osl::Module & rModule, const OUString & rBridgeName)
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{
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bool bNeg;
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{
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MappingsData & rData = getMappingsData();
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std::scoped_lock aGuard( rData.aNegativeLibsMutex );
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const auto iFind( rData.aNegativeLibs.find( rBridgeName ) );
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bNeg = (iFind != rData.aNegativeLibs.end());
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}
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if (!bNeg)
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{
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bool bModule;
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try {
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bModule = cppu::detail::loadModule(rModule, rBridgeName);
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}
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catch(...) {
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// convert throw to return false
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bModule = false;
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}
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if (bModule)
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return true;
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setNegativeBridge( rBridgeName ); // no load again
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}
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return false;
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}
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#endif
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static Mapping loadExternalMapping(
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const Environment & rFrom, const Environment & rTo, const OUString & rAddPurpose )
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{
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OSL_ASSERT( rFrom.is() && rTo.is() );
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if (rFrom.is() && rTo.is())
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{
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#ifdef DISABLE_DYNLOADING
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OUString aName;
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uno_ext_getMappingFunc fpGetMapFunc = 0;
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if (EnvDcp::getTypeName(rFrom.getTypeName()) == UNO_LB_UNO)
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{
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aName = getBridgeName( rTo, rFrom, rAddPurpose );
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fpGetMapFunc = selectMapFunc( aName );
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}
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if (! fpGetMapFunc)
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{
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aName = getBridgeName( rFrom, rTo, rAddPurpose );
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fpGetMapFunc = selectMapFunc( aName );
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}
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if (! fpGetMapFunc)
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{
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aName = getBridgeName( rTo, rFrom, rAddPurpose );
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fpGetMapFunc = selectMapFunc( aName );
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}
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if (! fpGetMapFunc)
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{
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SAL_INFO("cppu", "Could not find mapfunc for " << aName);
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return Mapping();
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}
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if (fpGetMapFunc)
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{
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Mapping aExt;
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(*fpGetMapFunc)( (uno_Mapping **)&aExt, rFrom.get(), rTo.get() );
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OSL_ASSERT( aExt.is() );
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if (aExt.is())
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return aExt;
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SAL_INFO("cppu", "Could not load external mapping for " << aName);
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}
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#else
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// find proper lib
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osl::Module aModule;
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bool bModule(false);
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OUString aName;
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if ( EnvDcp::getTypeName(rFrom.getTypeName()) == UNO_LB_UNO )
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{
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aName = getBridgeName( rTo, rFrom, rAddPurpose );
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bModule = loadModule( aModule, aName );
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}
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if (!bModule)
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{
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aName = getBridgeName( rFrom, rTo, rAddPurpose );
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bModule = loadModule( aModule, aName );
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}
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if (!bModule)
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{
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aName = getBridgeName( rTo, rFrom, rAddPurpose );
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bModule = loadModule( aModule, aName );
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}
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if (bModule)
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{
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uno_ext_getMappingFunc fpGetMapFunc =
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reinterpret_cast<uno_ext_getMappingFunc>(aModule.getSymbol( u"" UNO_EXT_GETMAPPING ""_ustr ));
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if (fpGetMapFunc)
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{
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Mapping aExt;
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(*fpGetMapFunc)( reinterpret_cast<uno_Mapping **>(&aExt), rFrom.get(), rTo.get() );
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OSL_ASSERT( aExt.is() );
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if (aExt.is())
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{
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aModule.release();
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return aExt;
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}
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}
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aModule.unload();
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setNegativeBridge( aName );
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}
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#endif
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}
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return Mapping();
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}
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static Mapping getDirectMapping(
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const Environment & rFrom, const Environment & rTo, const OUString & rAddPurpose = OUString() )
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{
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OSL_ASSERT( rFrom.is() && rTo.is() );
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if (rFrom.is() && rTo.is())
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{
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MappingsData & rData = getMappingsData();
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ClearableMutexGuard aGuard( rData.aMappingsMutex );
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// try to find registered mapping
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const t_OUString2Entry::const_iterator iFind( rData.aName2Entry.find(
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getMappingName( rFrom, rTo, rAddPurpose ) ) );
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if (iFind == rData.aName2Entry.end())
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{
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aGuard.clear();
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return loadExternalMapping( rFrom, rTo, rAddPurpose );
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}
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return Mapping( (*iFind).second->pMapping );
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}
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return Mapping();
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}
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static Mapping createMediateMapping(
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const Environment & rFrom, const Environment & rTo,
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const Mapping & rFrom2Uno, const Mapping & rUno2To,
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const OUString & rAddPurpose )
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{
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uno_Mapping * pRet = new uno_Mediate_Mapping(
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rFrom, rTo, rFrom2Uno, rUno2To, rAddPurpose ); // ref count initially 1
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uno_registerMapping(
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&pRet, mediate_free, rFrom.get(), rTo.get(), rAddPurpose.pData );
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Mapping aRet( pRet );
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(*pRet->release)( pRet );
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return aRet;
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}
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static Mapping getMediateMapping(
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const Environment & rFrom, const Environment & rTo, const OUString & rAddPurpose )
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{
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Environment aUno;
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Mapping aUno2To;
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// backwards: from dest to source of mapping chain
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// connect to uno
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OUString aUnoEnvTypeName( u"" UNO_LB_UNO ""_ustr );
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if (rTo.getTypeName() == aUnoEnvTypeName) // to is uno
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{
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aUno = rTo;
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// no Uno2To mapping necessary
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}
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else
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{
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// get registered uno env
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::uno_getEnvironment( reinterpret_cast<uno_Environment **>(&aUno), aUnoEnvTypeName.pData, nullptr );
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aUno2To = getDirectMapping( aUno, rTo );
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// : uno <-> to
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if (! aUno2To.is())
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return Mapping();
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}
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// connect to uno
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if (!rAddPurpose.isEmpty()) // insert purpose mapping between new ano_uno <-> uno
|
|
{
|
|
// create anonymous uno env
|
|
Environment aAnUno;
|
|
::uno_createEnvironment( reinterpret_cast<uno_Environment **>(&aAnUno), aUnoEnvTypeName.pData, nullptr );
|
|
|
|
Mapping aAnUno2Uno( getDirectMapping( aAnUno, aUno, rAddPurpose ) );
|
|
if (! aAnUno2Uno.is())
|
|
return Mapping();
|
|
|
|
if (aUno2To.is()) // to is not uno
|
|
{
|
|
// create another purposed mediate mapping
|
|
aUno2To = createMediateMapping( aAnUno, rTo, aAnUno2Uno, aUno2To, rAddPurpose );
|
|
// : ano_uno <-> uno <-> to
|
|
}
|
|
else
|
|
{
|
|
aUno2To = std::move(aAnUno2Uno);
|
|
// : ano_uno <-> to (i.e., uno)
|
|
}
|
|
aUno = std::move(aAnUno);
|
|
}
|
|
|
|
Mapping aFrom2Uno( getDirectMapping( rFrom, aUno ) );
|
|
if (aFrom2Uno.is() && aUno2To.is())
|
|
{
|
|
return createMediateMapping( rFrom, rTo, aFrom2Uno, aUno2To, rAddPurpose );
|
|
// : from <-> some uno ...
|
|
}
|
|
|
|
return Mapping();
|
|
}
|
|
}
|
|
|
|
using namespace ::cppu;
|
|
|
|
extern "C"
|
|
{
|
|
|
|
void SAL_CALL uno_getMapping(
|
|
uno_Mapping ** ppMapping, uno_Environment * pFrom, uno_Environment * pTo,
|
|
rtl_uString * pAddPurpose ) noexcept
|
|
{
|
|
assert(ppMapping != nullptr);
|
|
assert(pFrom != nullptr);
|
|
assert(pTo != nullptr);
|
|
if (*ppMapping)
|
|
{
|
|
(*(*ppMapping)->release)( *ppMapping );
|
|
*ppMapping = nullptr;
|
|
}
|
|
|
|
Mapping aRet;
|
|
Environment aFrom( pFrom ), aTo( pTo );
|
|
|
|
OUString aAddPurpose;
|
|
if (pAddPurpose)
|
|
aAddPurpose = pAddPurpose;
|
|
|
|
MappingsData & rData = getMappingsData();
|
|
|
|
// try registered mapping
|
|
{
|
|
MutexGuard aGuard( rData.aMappingsMutex );
|
|
const t_OUString2Entry::const_iterator iFind( rData.aName2Entry.find(
|
|
getMappingName( aFrom, aTo, aAddPurpose ) ) );
|
|
if (iFind != rData.aName2Entry.end())
|
|
aRet = (*iFind).second->pMapping;
|
|
}
|
|
|
|
// See if an identity mapping does fit.
|
|
if (!aRet.is() && pFrom == pTo && aAddPurpose.isEmpty())
|
|
aRet = createIdentityMapping(pFrom);
|
|
|
|
if (!aRet.is())
|
|
{
|
|
getCascadeMapping(ppMapping, pFrom, pTo, pAddPurpose);
|
|
|
|
if (*ppMapping)
|
|
return;
|
|
|
|
// try callback chain
|
|
{
|
|
std::unique_lock aGuard(rData.aCallbacksMutex);
|
|
for (const auto& rCallback : rData.aCallbacks)
|
|
{
|
|
(*rCallback)(ppMapping, pFrom, pTo, aAddPurpose.pData);
|
|
if (*ppMapping)
|
|
return;
|
|
}
|
|
}
|
|
|
|
aRet = loadExternalMapping( aFrom, aTo, aAddPurpose ); // direct try
|
|
if (! aRet.is())
|
|
aRet = getMediateMapping( aFrom, aTo, aAddPurpose ); // try via uno
|
|
}
|
|
|
|
if (aRet.is())
|
|
{
|
|
(*aRet.get()->acquire)( aRet.get() );
|
|
*ppMapping = aRet.get();
|
|
}
|
|
}
|
|
|
|
void SAL_CALL uno_getMappingByName(
|
|
uno_Mapping ** ppMapping, rtl_uString * pFrom, rtl_uString * pTo,
|
|
rtl_uString * pAddPurpose ) noexcept
|
|
{
|
|
assert(ppMapping && pFrom && pTo && "### null ptr!");
|
|
if (*ppMapping)
|
|
{
|
|
(*(*ppMapping)->release)( *ppMapping );
|
|
*ppMapping = nullptr;
|
|
}
|
|
|
|
uno_Environment * pEFrom = nullptr;
|
|
uno_getEnvironment( &pEFrom, pFrom, nullptr );
|
|
OSL_ENSURE( pEFrom, "### cannot get source environment!" );
|
|
if (pEFrom)
|
|
{
|
|
uno_Environment * pETo = nullptr;
|
|
uno_getEnvironment( &pETo, pTo, nullptr );
|
|
OSL_ENSURE( pETo, "### cannot get target environment!" );
|
|
if (pETo)
|
|
{
|
|
::uno_getMapping( ppMapping, pEFrom, pETo, pAddPurpose );
|
|
(*pETo->release)( pETo );
|
|
}
|
|
(*pEFrom->release)( pEFrom );
|
|
}
|
|
}
|
|
|
|
|
|
void SAL_CALL uno_registerMapping(
|
|
uno_Mapping ** ppMapping, uno_freeMappingFunc freeMapping,
|
|
uno_Environment * pFrom, uno_Environment * pTo, rtl_uString * pAddPurpose ) noexcept
|
|
{
|
|
MappingsData & rData = getMappingsData();
|
|
ClearableMutexGuard aGuard( rData.aMappingsMutex );
|
|
|
|
const t_Mapping2Entry::const_iterator iFind( rData.aMapping2Entry.find( *ppMapping ) );
|
|
if (iFind == rData.aMapping2Entry.end())
|
|
{
|
|
OUString aMappingName(
|
|
getMappingName( pFrom, pTo, pAddPurpose ? OUString(pAddPurpose) : OUString() ) );
|
|
SAL_INFO("cppu", "> inserting new mapping: " << aMappingName);
|
|
// count initially 1
|
|
MappingEntry * pEntry = new MappingEntry( *ppMapping, freeMapping, aMappingName );
|
|
rData.aName2Entry[ aMappingName ] = pEntry;
|
|
rData.aMapping2Entry[ *ppMapping ] = pEntry;
|
|
}
|
|
else
|
|
{
|
|
MappingEntry * pEntry = (*iFind).second;
|
|
++pEntry->nRef;
|
|
|
|
if (pEntry->pMapping != *ppMapping) // exchange mapping to be registered
|
|
{
|
|
(*pEntry->pMapping->acquire)( pEntry->pMapping );
|
|
--pEntry->nRef; // correct count; kill mapping to be registered
|
|
aGuard.clear();
|
|
(*freeMapping)( *ppMapping );
|
|
*ppMapping = pEntry->pMapping;
|
|
}
|
|
}
|
|
}
|
|
|
|
void SAL_CALL uno_revokeMapping(
|
|
uno_Mapping * pMapping ) noexcept
|
|
{
|
|
MappingsData & rData = getMappingsData();
|
|
ClearableMutexGuard aGuard( rData.aMappingsMutex );
|
|
|
|
const t_Mapping2Entry::const_iterator iFind( rData.aMapping2Entry.find( pMapping ) );
|
|
assert(iFind != rData.aMapping2Entry.end() && "pMapping must be registered to be removed");
|
|
MappingEntry * pEntry = (*iFind).second;
|
|
if (! --pEntry->nRef)
|
|
{
|
|
rData.aMapping2Entry.erase( pEntry->pMapping );
|
|
rData.aName2Entry.erase( pEntry->aMappingName );
|
|
aGuard.clear();
|
|
SAL_INFO("cppu", "> revoking mapping " << pEntry->aMappingName);
|
|
(*pEntry->freeMapping)( pEntry->pMapping );
|
|
delete pEntry;
|
|
}
|
|
}
|
|
|
|
|
|
void SAL_CALL uno_registerMappingCallback(
|
|
uno_getMappingFunc pCallback ) noexcept
|
|
{
|
|
OSL_ENSURE( pCallback, "### null ptr!" );
|
|
MappingsData & rData = getMappingsData();
|
|
std::unique_lock aGuard( rData.aCallbacksMutex );
|
|
rData.aCallbacks.insert( pCallback );
|
|
}
|
|
|
|
void SAL_CALL uno_revokeMappingCallback(
|
|
uno_getMappingFunc pCallback ) noexcept
|
|
{
|
|
OSL_ENSURE( pCallback, "### null ptr!" );
|
|
MappingsData & rData = getMappingsData();
|
|
std::unique_lock aGuard( rData.aCallbacksMutex );
|
|
rData.aCallbacks.erase( pCallback );
|
|
}
|
|
} // extern "C"
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|