SubComponent.hxx

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 *   Licensed to the Apache Software Foundation (ASF) under one or more
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#pragma once
 
#include <cppuhelper/propshlp.hxx>
#include <osl/diagnose.h>
#include <osl/mutex.hxx>
 
namespace cppu { class IPropertyArrayHelper; }
namespace com::sun::star::lang { class XComponent; }
 
namespace connectivity::firebird
    {
        void checkDisposed(bool _bThrow);
 
 
        template <class TYPE>
        class OPropertyArrayUsageHelper
        {
        protected:
            static sal_Int32                        s_nRefCount;
            static ::cppu::IPropertyArrayHelper*    s_pProps;
            static ::osl::Mutex                     s_aMutex;
 
        public:
            OPropertyArrayUsageHelper();
            virtual ~OPropertyArrayUsageHelper();
 
            ::cppu::IPropertyArrayHelper*   getArrayHelper();
 
        protected:
            virtual ::cppu::IPropertyArrayHelper* createArrayHelper( ) const = 0;
        };
 
        template<class TYPE>
        sal_Int32                       OPropertyArrayUsageHelper< TYPE >::s_nRefCount  = 0;
 
        template<class TYPE>
        ::cppu::IPropertyArrayHelper*   OPropertyArrayUsageHelper< TYPE >::s_pProps = nullptr;
 
        template<class TYPE>
        ::osl::Mutex                    OPropertyArrayUsageHelper< TYPE >::s_aMutex;
 
 
        template <class TYPE>
        OPropertyArrayUsageHelper<TYPE>::OPropertyArrayUsageHelper()
        {
            ::osl::MutexGuard aGuard(s_aMutex);
            ++s_nRefCount;
        }
 
 
        template <class TYPE>
        OPropertyArrayUsageHelper<TYPE>::~OPropertyArrayUsageHelper()
        {
            ::osl::MutexGuard aGuard(s_aMutex);
            OSL_ENSURE(s_nRefCount > 0, "OPropertyArrayUsageHelper::~OPropertyArrayUsageHelper : suspicious call : have a refcount of 0 !");
            if (!--s_nRefCount)
            {
                delete s_pProps;
                s_pProps = nullptr;
            }
        }
 
 
        template <class TYPE>
        ::cppu::IPropertyArrayHelper* OPropertyArrayUsageHelper<TYPE>::getArrayHelper()
        {
            OSL_ENSURE(s_nRefCount, "OPropertyArrayUsageHelper::getArrayHelper : suspicious call : have a refcount of 0 !");
            if (!s_pProps)
            {
                ::osl::MutexGuard aGuard(s_aMutex);
                if (!s_pProps)
                {
                    s_pProps = createArrayHelper();
                    OSL_ENSURE(s_pProps, "OPropertyArrayUsageHelper::getArrayHelper : createArrayHelper returned nonsense !");
                }
            }
            return s_pProps;
        }
 
}
 
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