Teuchos - Trilinos Tools Package Version of the Day
Teuchos_OpaqueWrapper.hpp
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00041 
00042 #ifndef TEUCHOS_OPAQUE_WRAPPER_HPP
00043 #define TEUCHOS_OPAQUE_WRAPPER_HPP
00044 
00045 
00046 #include "Teuchos_RCP.hpp"
00047 
00048 
00049 //#define TEUCHOS_OPAQUE_WRAPPER_ANNOUNCE_FREE
00050 
00051 #ifdef TEUCHOS_OPAQUE_WRAPPER_ANNOUNCE_FREE
00052 #  include "Teuchos_VerboseObject.hpp"
00053 #endif // TEUCHOS_OPAQUE_WRAPPER_ANNOUNCE_FREE
00054 
00055 
00056 namespace Teuchos {
00057 
00058 
00121 template <class Opaque>
00122 class OpaqueWrapper {
00123 public:
00125   OpaqueWrapper( Opaque opaque )
00126     : opaque_(opaque)
00127     {}
00129   operator Opaque () const
00130     { return opaque_; }
00132   Opaque operator()() const
00133     { return opaque_; }
00134 protected:
00135   Opaque  opaque_; // Bad in general but ...
00136 private:
00137   OpaqueWrapper(); // Not defined
00138   OpaqueWrapper(const OpaqueWrapper&); // Not defined
00139   OpaqueWrapper& operator=(const OpaqueWrapper&); // Not defined
00140 }; 
00141 
00158 template <class Opaque, class OpaqueFree>
00159 class OpaqueWrapperWithFree : public OpaqueWrapper<Opaque> {
00160 public:
00161   OpaqueWrapperWithFree( Opaque opaque, OpaqueFree opaqueFree )
00162     : OpaqueWrapper<Opaque>(opaque), opaqueFree_(opaqueFree)
00163     {}
00164   ~OpaqueWrapperWithFree()
00165     {
00166       if(opaqueFree_) {
00167 #ifdef TEUCHOS_OPAQUE_WRAPPER_ANNOUNCE_FREE
00168         Teuchos::RCP<Teuchos::FancyOStream>
00169           out = Teuchos::VerboseObjectBase::getDefaultOStream();
00170         Teuchos::OSTab tab(out);
00171         *out << "\nOpaqueWrapperWithFree::~OpaqueWrapperWithFree(): Freeing opaque object"
00172              << " of type " << TypeNameTraits<Opaque>::name() << "!\n";
00173 #endif // TEUCHOS_OPAQUE_WRAPPER_ANNOUNCE_FREE
00174         opaqueFree_(&this->opaque_);
00175       }
00176     }
00177 private:
00178   OpaqueFree opaqueFree_;
00179   OpaqueWrapperWithFree(); // Not defined
00180   OpaqueWrapperWithFree(const OpaqueWrapperWithFree&); // Not defined
00181   OpaqueWrapperWithFree& operator=(const OpaqueWrapperWithFree&); // Not defined
00182 }; 
00183 
00184 
00190 template <class Opaque>
00191 inline
00192 RCP<OpaqueWrapper<Opaque> >
00193 opaqueWrapper( Opaque opaque)
00194 {
00195   return rcp(new OpaqueWrapper<Opaque>(opaque));
00196 }
00197 
00198 
00204 template <class Opaque, class OpaqueFree>
00205 inline
00206 RCP<OpaqueWrapper<Opaque> >
00207 opaqueWrapper( Opaque opaque, OpaqueFree opaqueFree)
00208 {
00209   return rcp(new OpaqueWrapperWithFree<Opaque,OpaqueFree>(opaque,opaqueFree));
00210 }
00211 
00212 
00213 } // namespace Teuchos
00214 
00215 
00216 #endif  // TEUCHOS_OPAQUE_WRAPPER_HPP
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