95 lines
2.6 KiB
C++
95 lines
2.6 KiB
C++
/** \file
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* Global Interface Table wrapper.
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*/
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/*
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* Copyright © 2000, 2001 Sofus Mortensen
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*
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* This material is provided "as is", with absolutely no warranty
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* expressed or implied. Any use is at your own risk. Permission to
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* use or copy this software for any purpose is hereby granted without
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* fee, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is
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* granted, provided the above notices are retained, and a notice that
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* the code was modified is included with the above copyright notice.
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*
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* This header is part of Comet version 2.
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* https://github.com/alamaison/comet
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*/
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#ifndef COMET_GIT_H
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#define COMET_GIT_H
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#include <comet/config.h>
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#include <comet/ptr.h>
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namespace comet {
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/*! \addtogroup COMType
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*/
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//@{
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class GIT;
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/// Type-safe GIT Cookie.
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template<typename Itf> class GIT_cookie
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{
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friend class GIT;
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public:
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GIT_cookie(const GIT_cookie& c) : cookie_(c.cookie_) {}
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explicit GIT_cookie(DWORD c) : cookie_(c) {}
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GIT_cookie() : cookie_(0) {}
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DWORD get_cookie() const { return cookie_; }
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private:
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DWORD cookie_;
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};
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/// Global Interface Table wrapper.
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class GIT {
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public:
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GIT() : git_(CLSID_StdGlobalInterfaceTable)
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{}
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/** Register Interface in the GIT.
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* \param ptr Interface to register.
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* \return Type-safe cookie.
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*/
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template<typename Itf>
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GIT_cookie<Itf> register_interface(com_ptr<Itf> const & ptr)
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{
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DWORD cookie;
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git_->RegisterInterfaceInGlobal(ptr.get(), uuidof<Itf>(), &cookie) | raise_exception;
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return GIT_cookie<Itf>(cookie);
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}
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/** Retrieve Interface in the GIT.
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* \param c Cookie
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* \return Marshalled interface.
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*/
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template<typename Itf>
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com_ptr<Itf> get_interface(GIT_cookie<Itf> const& c)
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{
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Itf* itf;
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git_->GetInterfaceFromGlobal(c.get_cookie(), uuidof<Itf>(), reinterpret_cast<void**>(&itf)) | raise_exception;
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return auto_attach(itf);
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}
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/** Revoke the cookie from the GIT.
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* \param c Cookie.
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*/
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template<typename Itf>
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void revoke_interface(GIT_cookie<Itf> const& c)
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{
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HRESULT hr = git_->RevokeInterfaceFromGlobal(c.get_cookie());
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hr;
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assert(SUCCEEDED(hr));
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}
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private:
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com_ptr< ::IGlobalInterfaceTable> git_;
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};
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//@}
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} // namespace comet
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#endif
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