connectivity/source/drivers/mysqlc/mysqlc_subcomponent.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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   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
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  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 #ifndef INCLUDED_MYSQLC_SOURCE_MYSQLC_SUBCOMPONENT_HXX
  21 #define INCLUDED_MYSQLC_SOURCE_MYSQLC_SUBCOMPONENT_HXX
  22
  23 #include <cppuhelper/propshlp.hxx>
  24 #include <osl/diagnose.h>
  25 #include <osl/mutex.hxx>
  26
  27 namespace cppu
  28 {
  29 class IPropertyArrayHelper;
  30 }
  31 namespace com::sun::star::lang
  32 {
  33 class XComponent;
  34 }
  35
  36 namespace connectivity::mysqlc
  37 {
  38 /// @throws css::lang::DisposedException
  39 void checkDisposed(bool _bThrow);
  40
  41 template <class TYPE> class OPropertyArrayUsageHelper
  42 {
  43 protected:
  44     static sal_Int32 s_nRefCount;
  45     static ::cppu::IPropertyArrayHelper* s_pProps;
  46     static ::osl::Mutex s_aMutex;
  47
  48 public:
  49     OPropertyArrayUsageHelper();
  50     virtual ~OPropertyArrayUsageHelper();
  51
  52     /** call this in the getInfoHelper method of your derived class. The method returns the array helper of the
  53                 class, which is created if necessary.
  54             */
  55     ::cppu::IPropertyArrayHelper* getArrayHelper();
  56
  57 protected:
  58     /** used to implement the creation of the array helper which is shared amongst all instances of the class.
  59                 This method needs to be implemented in derived classes.
  60                 <BR>
  61                 The method gets called with s_aMutex acquired.
  62                 @return                         a pointer to the newly created array helper. Must not be NULL.
  63             */
  64     virtual ::cppu::IPropertyArrayHelper* createArrayHelper() const = 0;
  65 };
  66
  67 template <class TYPE> sal_Int32 OPropertyArrayUsageHelper<TYPE>::s_nRefCount = 0;
  68
  69 template <class TYPE>
  70 ::cppu::IPropertyArrayHelper* OPropertyArrayUsageHelper<TYPE>::s_pProps = nullptr;
  71
  72 template <class TYPE>::osl::Mutex OPropertyArrayUsageHelper<TYPE>::s_aMutex;
  73
  74 template <class TYPE> OPropertyArrayUsageHelper<TYPE>::OPropertyArrayUsageHelper()
  75 {
  76     ::osl::MutexGuard aGuard(s_aMutex);
  77     ++s_nRefCount;
  78 }
  79
  80 template <class TYPE> OPropertyArrayUsageHelper<TYPE>::~OPropertyArrayUsageHelper()
  81 {
  82     ::osl::MutexGuard aGuard(s_aMutex);
  83     OSL_ENSURE(s_nRefCount > 0, "OPropertyArrayUsageHelper::~OPropertyArrayUsageHelper : "
  84                                 "suspicious call : have a refcount of 0 !");
  85     if (!--s_nRefCount)
  86     {
  87         delete s_pProps;
  88         s_pProps = nullptr;
  89     }
  90 }
  91
  92 template <class TYPE>::cppu::IPropertyArrayHelper* OPropertyArrayUsageHelper<TYPE>::getArrayHelper()
  93 {
  94     OSL_ENSURE(
  95         s_nRefCount,
  96         "OPropertyArrayUsageHelper::getArrayHelper : suspicious call : have a refcount of 0 !");
  97     if (!s_pProps)
  98     {
  99         ::osl::MutexGuard aGuard(s_aMutex);
 100         if (!s_pProps)
 101         {
 102             s_pProps = createArrayHelper();
 103             OSL_ENSURE(s_pProps, "OPropertyArrayUsageHelper::getArrayHelper : createArrayHelper "
 104                                  "returned nonsense !");
 105         }
 106     }
 107     return s_pProps;
 108 }
 109
 110 class OBase_Mutex
 111 {
 112 public:
 113     ::osl::Mutex m_aMutex;
 114 };
 115
 116 namespace internal
 117 {
 118 template <class T> void implCopySequence(const T* _pSource, T*& _pDest, sal_Int32 _nSourceLen)
 119 {
 120     for (sal_Int32 i = 0; i < _nSourceLen; ++i, ++_pSource, ++_pDest)
 121         *_pDest = *_pSource;
 122 }
 123 }
 124
 125 /// concat two sequences
 126 template <class T>
 127 css::uno::Sequence<T> concatSequences(const css::uno::Sequence<T>& _rLeft,
 128                                       const css::uno::Sequence<T>& _rRight)
 129 {
 130     sal_Int32 nLeft(_rLeft.getLength()), nRight(_rRight.getLength());
 131     const T* pLeft = _rLeft.getConstArray();
 132     const T* pRight = _rRight.getConstArray();
 133
 134     sal_Int32 nReturnLen(nLeft + nRight);
 135     css::uno::Sequence<T> aReturn(nReturnLen);
 136     T* pReturn = aReturn.getArray();
 137
 138     internal::implCopySequence(pLeft, pReturn, nLeft);
 139     internal::implCopySequence(pRight, pReturn, nRight);
 140
 141     return aReturn;
 142 }
 143 }
 144
 145 #endif // INCLUDED_MYSQLC_SOURCE_MYSQLC_SUBCOMPONENT_HXX
 146
 147 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */