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/*** |
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*marshal_windows.h |
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* |
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* Copyright (c) Microsoft Corporation. All rights reserved. |
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* |
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*Purpose: Marshalling classes |
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* |
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* [Public] |
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* |
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****/ |
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#pragma once |
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#ifndef _INC_MSCLR_MARSHAL_WINDOWS |
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#define _INC_MSCLR_MARSHAL_WINDOWS |
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#include <msclr\marshal.h> |
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#include <windows.h> |
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#include <comutil.h> |
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#using <mscorlib.dll> |
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namespace msclr{ |
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namespace interop{ |
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//-------------------------------------------------------------------------------- |
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// Context-free conversions templates specialization for windows types |
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//-------------------------------------------------------------------------------- |
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// |
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// for BSTR -> System::String^, please see wchar_t* -> String^ in marshal.h |
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// |
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template <> |
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inline System::String^ marshal_as(const _bstr_t & _from_object) |
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{ |
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BSTR _bstr = _from_object.copy(false); |
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if (_bstr == NULL) |
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{ |
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return nullptr; |
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} |
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// Using PtrToStringBSTR here instead of marshal_as<String^, BSTR>() because we want to perserve the embedded NULLs |
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return System::Runtime::InteropServices::Marshal::PtrToStringBSTR(System::IntPtr(_bstr)); |
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} |
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template <> |
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inline _bstr_t marshal_as(System::String^ const & _from_object) |
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{ |
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if (_from_object == nullptr) |
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{ |
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return _bstr_t(static_cast<BSTR>(NULL)); |
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} |
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_bstr_t _ret_bstr_t; |
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cli::pin_ptr<const wchar_t> _pinned_ptr = PtrToStringChars(_from_object); |
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_ret_bstr_t.Attach(::SysAllocStringLen(_pinned_ptr, _from_object->Length)); |
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if (!_ret_bstr_t) |
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{ |
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throw gcnew System::OutOfMemoryException(); |
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template <class _To_Type> |
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inline _To_Type marshal_as(System::IntPtr _from_object); |
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template <> |
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inline HANDLE marshal_as(System::IntPtr _from_object) |
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{ |
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return static_cast<HANDLE>(_from_object.ToPointer()); |
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} |
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//-------------------------------------------------------------------------------- |
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// Context conversion templates specialization for windows types |
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//-------------------------------------------------------------------------------- |
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template<> |
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ref class context_node<BSTR, System::String^> : |
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public context_node_base |
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{ |
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private: |
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System::IntPtr _ip; |
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public: |
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context_node(BSTR& _to_object, System::String^ from) |
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{ |
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_ip = System::Runtime::InteropServices::Marshal::StringToBSTR (from); |
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_to_object = static_cast<BSTR>(_ip.ToPointer()); |
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} |
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~context_node() |
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{ |
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this->!context_node(); |
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} |
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protected: |
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!context_node() |
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{ |
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if(_ip != System::IntPtr::Zero) |
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System::Runtime::InteropServices::Marshal::FreeBSTR(_ip); |
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} |
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}; |
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} //namespace interop |
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} //namespace msclr |
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#endif // _INC_MSCLR_MARSHAL_WINDOWS |
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