bridges/inc/bridge.hxx

   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 #pragma once
  21
  22 #include <sal/config.h>
  23
  24 #include <atomic>
  25 #include <cstddef>
  26
  27 #include <sal/types.h>
  28 #include <typelib/typedescription.h>
  29 #include <uno/environment.h>
  30 #include <uno/mapping.h>
  31
  32 namespace bridges::cpp_uno::shared {
  33
  34 // private:
  35 extern "C" void freeMapping(uno_Mapping *);
  36
  37 // private:
  38 extern "C" void acquireMapping(uno_Mapping *);
  39
  40 // private:
  41 extern "C" void releaseMapping(uno_Mapping *);
  42
  43 // private:
  44 extern "C" void cpp2unoMapping(
  45     uno_Mapping *, void **, void *, typelib_InterfaceTypeDescription *);
  46
  47 // private:
  48 extern "C" void uno2cppMapping(
  49     uno_Mapping *, void **, void *, typelib_InterfaceTypeDescription *);
  50
  51 /**
  52  * Holding environments and mappings.
  53  */
  54 class Bridge {
  55 public:
  56     // Interface for generic/component.cxx:
  57
  58     static uno_Mapping * createMapping(
  59         uno_ExtEnvironment * pCppEnv, uno_ExtEnvironment * pUnoEnv,
  60         bool bExportCpp2Uno);
  61
  62     // Interface for Cpp/UnoInterfaceProxy:
  63
  64     void acquire();
  65     void release();
  66
  67     // Interface for individual CPP--UNO bridges:
  68
  69     uno_ExtEnvironment * getCppEnv() { return pCppEnv; }
  70     uno_ExtEnvironment * getUnoEnv() { return pUnoEnv; }
  71
  72     uno_Mapping * getCpp2Uno() { return &aCpp2Uno; }
  73     uno_Mapping * getUno2Cpp() { return &aUno2Cpp; }
  74
  75 private:
  76     Bridge(Bridge const &) = delete;
  77     Bridge& operator =(const Bridge&) = delete;
  78
  79     Bridge(
  80         uno_ExtEnvironment * pCppEnv_, uno_ExtEnvironment * pUnoEnv_,
  81         bool bExportCpp2Uno_);
  82
  83     ~Bridge();
  84
  85     struct Mapping: public uno_Mapping {
  86         Bridge * pBridge;
  87     };
  88
  89     std::atomic<std::size_t> nRef;
  90
  91     uno_ExtEnvironment * pCppEnv;
  92     uno_ExtEnvironment * pUnoEnv;
  93
  94     Mapping aCpp2Uno;
  95     Mapping aUno2Cpp;
  96
  97     bool bExportCpp2Uno;
  98
  99     friend void freeMapping(uno_Mapping * pMapping);
 100
 101     friend void acquireMapping(uno_Mapping * pMapping);
 102
 103     friend void releaseMapping(uno_Mapping * pMapping);
 104
 105     friend void cpp2unoMapping(
 106         uno_Mapping * pMapping, void ** ppUnoI, void * pCppI,
 107         typelib_InterfaceTypeDescription * pTypeDescr);
 108
 109     friend void uno2cppMapping(
 110         uno_Mapping * pMapping, void ** ppCppI, void * pUnoI,
 111         typelib_InterfaceTypeDescription * pTypeDescr);
 112 };
 113
 114 }
 115
 116 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */