connectivity/source/drivers/mysqlc/mysqlc_subcomponent.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 <cppuhelper/propshlp.hxx>
  23 #include <osl/diagnose.h>
  24 #include <osl/mutex.hxx>
  25
  26 namespace cppu
  27 {
  28 class IPropertyArrayHelper;
  29 }
  30 namespace com::sun::star::lang
  31 {
  32 class XComponent;
  33 }
  34
  35 namespace connectivity::mysqlc
  36 {
  37 /// @throws css::lang::DisposedException
  38 void checkDisposed(bool _bThrow);
  39
  40 template <class TYPE> class OPropertyArrayUsageHelper
  41 {
  42 protected:
  43     static sal_Int32 s_nRefCount;
  44     static ::cppu::IPropertyArrayHelper* s_pProps;
  45     static ::osl::Mutex s_aMutex;
  46
  47 public:
  48     OPropertyArrayUsageHelper();
  49     virtual ~OPropertyArrayUsageHelper();
  50
  51     /** call this in the getInfoHelper method of your derived class. The method returns the array helper of the
  52                 class, which is created if necessary.
  53             */
  54     ::cppu::IPropertyArrayHelper* getArrayHelper();
  55
  56 protected:
  57     /** used to implement the creation of the array helper which is shared amongst all instances of the class.
  58                 This method needs to be implemented in derived classes.
  59                 <BR>
  60                 The method gets called with s_aMutex acquired.
  61                 @return                         a pointer to the newly created array helper. Must not be NULL.
  62             */
  63     virtual ::cppu::IPropertyArrayHelper* createArrayHelper() const = 0;
  64 };
  65
  66 template <class TYPE> sal_Int32 OPropertyArrayUsageHelper<TYPE>::s_nRefCount = 0;
  67
  68 template <class TYPE>
  69 ::cppu::IPropertyArrayHelper* OPropertyArrayUsageHelper<TYPE>::s_pProps = nullptr;
  70
  71 template <class TYPE>::osl::Mutex OPropertyArrayUsageHelper<TYPE>::s_aMutex;
  72
  73 template <class TYPE> OPropertyArrayUsageHelper<TYPE>::OPropertyArrayUsageHelper()
  74 {
  75     ::osl::MutexGuard aGuard(s_aMutex);
  76     ++s_nRefCount;
  77 }
  78
  79 template <class TYPE> OPropertyArrayUsageHelper<TYPE>::~OPropertyArrayUsageHelper()
  80 {
  81     ::osl::MutexGuard aGuard(s_aMutex);
  82     OSL_ENSURE(s_nRefCount > 0, "OPropertyArrayUsageHelper::~OPropertyArrayUsageHelper : "
  83                                 "suspicious call : have a refcount of 0 !");
  84     if (!--s_nRefCount)
  85     {
  86         delete s_pProps;
  87         s_pProps = nullptr;
  88     }
  89 }
  90
  91 template <class TYPE>::cppu::IPropertyArrayHelper* OPropertyArrayUsageHelper<TYPE>::getArrayHelper()
  92 {
  93     OSL_ENSURE(
  94         s_nRefCount,
  95         "OPropertyArrayUsageHelper::getArrayHelper : suspicious call : have a refcount of 0 !");
  96     if (!s_pProps)
  97     {
  98         ::osl::MutexGuard aGuard(s_aMutex);
  99         if (!s_pProps)
 100         {
 101             s_pProps = createArrayHelper();
 102             OSL_ENSURE(s_pProps, "OPropertyArrayUsageHelper::getArrayHelper : createArrayHelper "
 103                                  "returned nonsense !");
 104         }
 105     }
 106     return s_pProps;
 107 }
 108
 109 class OBase_Mutex
 110 {
 111 public:
 112     ::osl::Mutex m_aMutex;
 113 };
 114
 115 namespace internal
 116 {
 117 template <class T> void implCopySequence(const T* _pSource, T*& _pDest, sal_Int32 _nSourceLen)
 118 {
 119     for (sal_Int32 i = 0; i < _nSourceLen; ++i, ++_pSource, ++_pDest)
 120         *_pDest = *_pSource;
 121 }
 122 }
 123
 124 /// concat two sequences
 125 template <class T>
 126 css::uno::Sequence<T> concatSequences(const css::uno::Sequence<T>& _rLeft,
 127                                       const css::uno::Sequence<T>& _rRight)
 128 {
 129     sal_Int32 nLeft(_rLeft.getLength()), nRight(_rRight.getLength());
 130     const T* pLeft = _rLeft.getConstArray();
 131     const T* pRight = _rRight.getConstArray();
 132
 133     sal_Int32 nReturnLen(nLeft + nRight);
 134     css::uno::Sequence<T> aReturn(nReturnLen);
 135     T* pReturn = aReturn.getArray();
 136
 137     internal::implCopySequence(pLeft, pReturn, nLeft);
 138     internal::implCopySequence(pRight, pReturn, nRight);
 139
 140     return aReturn;
 141 }
 142 }
 143
 144 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */