binaryurp/source/proxy.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include "sal/config.h"
  21
  22 #include <cassert>
  23 #include <exception>
  24 #include <vector>
  25
  26 #include "cppuhelper/exc_hlp.hxx"
  27 #include "rtl/ref.hxx"
  28 #include "rtl/ustring.hxx"
  29 #include "sal/types.h"
  30 #include "typelib/typedescription.h"
  31 #include "typelib/typedescription.hxx"
  32 #include "uno/any2.h"
  33 #include "uno/dispatcher.h"
  34 #include "uno/dispatcher.hxx"
  35
  36 #include "binaryany.hxx"
  37 #include "bridge.hxx"
  38 #include "proxy.hxx"
  39
  40 namespace binaryurp {
  41
  42 namespace {
  43
  44 extern "C" void SAL_CALL proxy_acquireInterface(uno_Interface * pInterface) {
  45     assert(pInterface != nullptr);
  46     static_cast< Proxy * >(pInterface)->do_acquire();
  47 }
  48
  49 extern "C" void SAL_CALL proxy_releaseInterface(uno_Interface * pInterface) {
  50     assert(pInterface != nullptr);
  51     static_cast< Proxy * >(pInterface)->do_release();
  52 }
  53
  54 extern "C" void SAL_CALL proxy_dispatchInterface(
  55     uno_Interface * pUnoI, typelib_TypeDescription const * pMemberType,
  56     void * pReturn, void ** pArgs, uno_Any ** ppException)
  57 {
  58     assert(pUnoI != nullptr);
  59     static_cast< Proxy * >(pUnoI)->do_dispatch(
  60         pMemberType, pReturn, pArgs, ppException);
  61 }
  62
  63 }
  64
  65 Proxy::Proxy(
  66     rtl::Reference< Bridge > const & bridge, OUString const & oid,
  67     css::uno::TypeDescription const & type):
  68     bridge_(bridge), oid_(oid), type_(type), references_(1)
  69 {
  70     assert(bridge.is());
  71     acquire = &proxy_acquireInterface;
  72     release = &proxy_releaseInterface;
  73     pDispatcher = &proxy_dispatchInterface;
  74 }
  75
  76
  77 void Proxy::do_acquire() {
  78     if (osl_atomic_increment(&references_) == 1) {
  79         bridge_->resurrectProxy(*this);
  80     }
  81 }
  82
  83 void Proxy::do_release() {
  84     if (osl_atomic_decrement(&references_) == 0) {
  85         bridge_->revokeProxy(*this);
  86     }
  87 }
  88
  89 void Proxy::do_free() {
  90     bridge_->freeProxy(*this);
  91     delete this;
  92 }
  93
  94 void Proxy::do_dispatch(
  95     typelib_TypeDescription const * member, void * returnValue,
  96     void ** arguments, uno_Any ** exception) const
  97 {
  98     try {
  99         try {
 100             do_dispatch_throw(member, returnValue, arguments, exception);
 101         } catch (const std::exception & e) {
 102             throw css::uno::RuntimeException(
 103                 "caught C++ exception: " +
 104                 OStringToOUString(
 105                     OString(e.what()), RTL_TEXTENCODING_ASCII_US));
 106                 // best-effort string conversion
 107         }
 108     } catch (const css::uno::RuntimeException &) {
 109         css::uno::Any exc(cppu::getCaughtException());
 110         uno_copyAndConvertData(
 111             *exception, &exc,
 112             (css::uno::TypeDescription(cppu::UnoType< css::uno::Any >::get()).
 113              get()),
 114             bridge_->getCppToBinaryMapping().get());
 115     }
 116 }
 117
 118 bool Proxy::isProxy(
 119     rtl::Reference< Bridge > const & bridge,
 120     css::uno::UnoInterfaceReference const & object, OUString * oid)
 121 {
 122     assert(object.is());
 123     return object.m_pUnoI->acquire == &proxy_acquireInterface &&
 124         static_cast< Proxy * >(object.m_pUnoI)->isProxy(bridge, oid);
 125 }
 126
 127 Proxy::~Proxy() {}
 128
 129 void Proxy::do_dispatch_throw(
 130     typelib_TypeDescription const * member, void * returnValue,
 131     void ** arguments, uno_Any ** exception) const
 132 {
 133     //TODO: Optimize queryInterface:
 134     assert(member != nullptr);
 135     bool bSetter = false;
 136     std::vector< BinaryAny > inArgs;
 137     switch (member->eTypeClass) {
 138     case typelib_TypeClass_INTERFACE_ATTRIBUTE:
 139         bSetter = returnValue == nullptr;
 140         if (bSetter) {
 141             inArgs.push_back(
 142                 BinaryAny(
 143                     css::uno::TypeDescription(
 144                         reinterpret_cast<
 145                             typelib_InterfaceAttributeTypeDescription const * >(
 146                                 member)->
 147                         pAttributeTypeRef),
 148                     arguments[0]));
 149         }
 150         break;
 151     case typelib_TypeClass_INTERFACE_METHOD:
 152         {
 153             typelib_InterfaceMethodTypeDescription const * mtd =
 154                 reinterpret_cast<
 155                     typelib_InterfaceMethodTypeDescription const * >(member);
 156             for (sal_Int32 i = 0; i != mtd->nParams; ++i) {
 157                 if (mtd->pParams[i].bIn) {
 158                     inArgs.push_back(
 159                         BinaryAny(
 160                             css::uno::TypeDescription(mtd->pParams[i].pTypeRef),
 161                             arguments[i]));
 162                 }
 163             }
 164             break;
 165         }
 166     default:
 167         assert(false); // this cannot happen
 168         break;
 169     }
 170     BinaryAny ret;
 171     std::vector< BinaryAny > outArgs;
 172     if (bridge_->makeCall(
 173             oid_,
 174             css::uno::TypeDescription(
 175                 const_cast< typelib_TypeDescription * >(member)),
 176             bSetter, inArgs, &ret, &outArgs))
 177     {
 178         assert(ret.getType().get()->eTypeClass == typelib_TypeClass_EXCEPTION);
 179         uno_any_construct(
 180             *exception, ret.getValue(ret.getType()), ret.getType().get(), nullptr);
 181     } else {
 182         switch (member->eTypeClass) {
 183         case typelib_TypeClass_INTERFACE_ATTRIBUTE:
 184             if (!bSetter) {
 185                 css::uno::TypeDescription t(
 186                     reinterpret_cast<
 187                         typelib_InterfaceAttributeTypeDescription const * >(
 188                             member)->
 189                     pAttributeTypeRef);
 190                 uno_copyData(returnValue, ret.getValue(t), t.get(), nullptr);
 191             }
 192             break;
 193         case typelib_TypeClass_INTERFACE_METHOD:
 194             {
 195                 typelib_InterfaceMethodTypeDescription const * mtd =
 196                     reinterpret_cast<
 197                         typelib_InterfaceMethodTypeDescription const * >(
 198                             member);
 199                 css::uno::TypeDescription t(mtd->pReturnTypeRef);
 200                 if (t.get()->eTypeClass != typelib_TypeClass_VOID) {
 201                     uno_copyData(returnValue, ret.getValue(t), t.get(), nullptr);
 202                 }
 203                 std::vector< BinaryAny >::iterator i(outArgs.begin());
 204                 for (sal_Int32 j = 0; j != mtd->nParams; ++j) {
 205                     if (mtd->pParams[j].bOut) {
 206                         css::uno::TypeDescription pt(mtd->pParams[j].pTypeRef);
 207                         if (mtd->pParams[j].bIn) {
 208                             (void) uno_assignData(
 209                                 arguments[j], pt.get(), i++->getValue(pt),
 210                                 pt.get(), nullptr, nullptr, nullptr);
 211                         } else {
 212                             uno_copyData(
 213                                 arguments[j], i++->getValue(pt), pt.get(), nullptr);
 214                         }
 215                     }
 216                 }
 217                 assert(i == outArgs.end());
 218                 break;
 219             }
 220         default:
 221             assert(false); // this cannot happen
 222             break;
 223         }
 224         *exception = nullptr;
 225     }
 226 }
 227
 228 bool Proxy::isProxy(
 229     rtl::Reference< Bridge > const & bridge, OUString * oid) const
 230 {
 231     assert(oid != nullptr);
 232     if (bridge == bridge_) {
 233         *oid = oid_;
 234         return true;
 235     } else {
 236         return false;
 237     }
 238 }
 239
 240 }
 241
 242 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */