cppu/source/threadpool/current.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 <rtl/byteseq.h>
  23 #include <osl/mutex.hxx>
  24
  25 #include <uno/current_context.h>
  26 #include <uno/environment.hxx>
  27 #include <uno/mapping.hxx>
  28 #include <typelib/typedescription.h>
  29
  30 #include "current.hxx"
  31
  32
  33 using namespace ::osl;
  34 using namespace ::rtl;
  35 using namespace ::cppu;
  36 using namespace ::com::sun::star::uno;
  37
  38 namespace cppu
  39 {
  40
  41 static typelib_InterfaceTypeDescription * get_type_XCurrentContext()
  42 {
  43     static typelib_InterfaceTypeDescription* s_type_XCurrentContext = []() {
  44         OUString sTypeName("com.sun.star.uno.XCurrentContext");
  45         typelib_InterfaceTypeDescription* pTD = nullptr;
  46         typelib_TypeDescriptionReference* pMembers[1] = { nullptr };
  47         OUString sMethodName0("com.sun.star.uno.XCurrentContext::getValueByName");
  48         typelib_typedescriptionreference_new(&pMembers[0], typelib_TypeClass_INTERFACE_METHOD,
  49                                              sMethodName0.pData);
  50         typelib_typedescription_newInterface(
  51             &pTD, sTypeName.pData, 0, 0, 0, 0, 0,
  52             *typelib_static_type_getByTypeClass(typelib_TypeClass_INTERFACE), 1, pMembers);
  53
  54         typelib_typedescription_register(reinterpret_cast<typelib_TypeDescription**>(&pTD));
  55         typelib_typedescriptionreference_release(pMembers[0]);
  56
  57         typelib_InterfaceMethodTypeDescription* pMethod = nullptr;
  58         typelib_Parameter_Init aParameters[1];
  59         OUString sParamName0("Name");
  60         OUString sParamType0("string");
  61         aParameters[0].pParamName = sParamName0.pData;
  62         aParameters[0].eTypeClass = typelib_TypeClass_STRING;
  63         aParameters[0].pTypeName = sParamType0.pData;
  64         aParameters[0].bIn = true;
  65         aParameters[0].bOut = false;
  66         rtl_uString* pExceptions[1];
  67         OUString sExceptionName0("com.sun.star.uno.RuntimeException");
  68         pExceptions[0] = sExceptionName0.pData;
  69         OUString sReturnType0("any");
  70         typelib_typedescription_newInterfaceMethod(&pMethod, 3, false, sMethodName0.pData,
  71                                                    typelib_TypeClass_ANY, sReturnType0.pData, 1,
  72                                                    aParameters, 1, pExceptions);
  73         typelib_typedescription_register(reinterpret_cast<typelib_TypeDescription**>(&pMethod));
  74         typelib_typedescription_release(&pMethod->aBase.aBase);
  75         // another static ref:
  76         ++reinterpret_cast<typelib_TypeDescription*>(pTD)->nStaticRefCount;
  77         return pTD;
  78     }();
  79
  80     return s_type_XCurrentContext;
  81 }
  82
  83 IdContainer::IdContainer()
  84     : pCurrentContext(nullptr)
  85     , pCurrentContextEnv(nullptr)
  86     , pLocalThreadId(nullptr)
  87     , pCurrentId(nullptr)
  88     , nRefCountOfCurrentId(0)
  89     , bInit(false)
  90 {
  91 }
  92
  93 IdContainer::~IdContainer()
  94 {
  95     if (pCurrentContext)
  96     {
  97         (*pCurrentContextEnv->releaseInterface)(
  98             pCurrentContextEnv, pCurrentContext );
  99         (*pCurrentContextEnv->aBase.release)(
 100             &pCurrentContextEnv->aBase );
 101     }
 102     if (bInit)
 103     {
 104         ::rtl_byte_sequence_release( pLocalThreadId );
 105         ::rtl_byte_sequence_release( pCurrentId );
 106     }
 107 }
 108
 109 IdContainer& getIdContainer()
 110 {
 111     static thread_local IdContainer aId;
 112     return aId;
 113 }
 114
 115 }
 116
 117 extern "C" sal_Bool SAL_CALL uno_setCurrentContext(
 118     void * pCurrentContext,
 119     rtl_uString * pEnvTypeName, void * pEnvContext )
 120     SAL_THROW_EXTERN_C()
 121 {
 122     IdContainer& id = getIdContainer();
 123
 124     // free old one
 125     if (id.pCurrentContext)
 126     {
 127         (*id.pCurrentContextEnv->releaseInterface)(
 128             id.pCurrentContextEnv, id.pCurrentContext );
 129         (*id.pCurrentContextEnv->aBase.release)(
 130             &id.pCurrentContextEnv->aBase );
 131         id.pCurrentContextEnv = nullptr;
 132
 133         id.pCurrentContext = nullptr;
 134     }
 135
 136     if (pCurrentContext)
 137     {
 138         uno_Environment * pEnv = nullptr;
 139         ::uno_getEnvironment( &pEnv, pEnvTypeName, pEnvContext );
 140         OSL_ASSERT( pEnv && pEnv->pExtEnv );
 141         if (pEnv)
 142         {
 143             if (pEnv->pExtEnv)
 144             {
 145                 id.pCurrentContextEnv = pEnv->pExtEnv;
 146                 (*id.pCurrentContextEnv->acquireInterface)(
 147                     id.pCurrentContextEnv, pCurrentContext );
 148                 id.pCurrentContext = pCurrentContext;
 149             }
 150             else
 151             {
 152                 (*pEnv->release)( pEnv );
 153                 return false;
 154             }
 155         }
 156         else
 157         {
 158             return false;
 159         }
 160     }
 161     return true;
 162 }
 163
 164 extern "C" sal_Bool SAL_CALL uno_getCurrentContext(
 165     void ** ppCurrentContext, rtl_uString * pEnvTypeName, void * pEnvContext )
 166     SAL_THROW_EXTERN_C()
 167 {
 168     IdContainer& id = getIdContainer();
 169
 170     Environment target_env;
 171
 172     // release inout parameter
 173     if (*ppCurrentContext)
 174     {
 175         target_env = Environment(OUString(pEnvTypeName), pEnvContext);
 176         OSL_ASSERT( target_env.is() );
 177         if (! target_env.is())
 178             return false;
 179         uno_ExtEnvironment * pEnv = target_env.get()->pExtEnv;
 180         OSL_ASSERT( nullptr != pEnv );
 181         if (nullptr == pEnv)
 182             return false;
 183         (*pEnv->releaseInterface)( pEnv, *ppCurrentContext );
 184
 185         *ppCurrentContext = nullptr;
 186     }
 187
 188     // case: null-ref
 189     if (nullptr == id.pCurrentContext)
 190         return true;
 191
 192     if (! target_env.is())
 193     {
 194         target_env = Environment(OUString(pEnvTypeName), pEnvContext);
 195         OSL_ASSERT( target_env.is() );
 196         if (! target_env.is())
 197             return false;
 198     }
 199
 200     Mapping mapping(&id.pCurrentContextEnv->aBase, target_env.get());
 201     OSL_ASSERT( mapping.is() );
 202     if (! mapping.is())
 203         return false;
 204
 205     mapping.mapInterface(ppCurrentContext, id.pCurrentContext, ::cppu::get_type_XCurrentContext());
 206
 207     return true;
 208 }
 209
 210 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */