143 lines
3.9 KiB
C++
143 lines
3.9 KiB
C++
/*
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InterfaceProxy - definition of forwarding proxies for the facade interfaces
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Copyright (C) Lumiera.org
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2008, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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#include "include/interfaceproxy.hpp"
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#include "common/instancehandle.hpp"
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#include "lib/error.hpp"
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#include "lib/util.hpp"
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using util::cStr;
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namespace lumiera{
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namespace facade {
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LUMIERA_ERROR_DEFINE (FACADE_LIFECYCLE, "facade is closed; service currently not accessible");
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/**
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* Implementation Base
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* for building Facade Proxy implementations.
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* Typically the purpose of such a proxy is to route
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* any calls through the C-Bindings of the Lumiera Interface system.
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* The actual storage for the concrete proxy object is embedded,
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* inline within the #open() function. For access by the clients,
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* a frontend-object of type \c Accessor<FA> may be placed into
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* the facade interface; this accessor-frontend is basically
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* a concealed static pointer to the proxy, and will be set,
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* when the interface is opened. This opening and closing
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* of the interface itself is controlled by the
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* InstanceHandle, which in turn is typically
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* created and managed within the context
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* of the service implementation.
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*/
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template<class IHA>
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class Holder;
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template<class FA, class I>
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class Holder<InstanceHandle<I,FA>>
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: Accessor<FA>
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, protected FA
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{
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protected:
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typedef InstanceHandle<I,FA> IHandle;
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typedef Holder<IHandle> THolder;
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typedef Proxy<IHandle> TProxy;
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typedef Accessor<FA> Access;
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I& _i_;
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Holder (IHandle const& iha)
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: _i_(iha.get())
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{ }
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public:
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static TProxy& open(IHandle const& iha)
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{
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static char buff[sizeof(TProxy)];
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TProxy* p = new(buff) TProxy(iha);
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Access::implProxy_ = p;
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return *p;
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}
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static void close()
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{
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if (!Access::implProxy_) return;
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TProxy* p = static_cast<TProxy*> (Access::implProxy_);
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Access::implProxy_ = 0;
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p->~TProxy();
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}
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};
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template<class FA>
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FA* Accessor<FA>::implProxy_;
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template<class IHA>
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void
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openProxy (IHA const& iha)
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{
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Proxy<IHA>::open(iha);
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}
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template<class IHA>
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void
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closeProxy ()
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{
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Proxy<IHA>::close();
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}
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}} // namespace lumiera::facade
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/* ===================================================================== */
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/* including explicit Proxy-Definitions for all facade interfaces */
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/* ===================================================================== */
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/* ==================== SessionCommand ================================= */
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#include "proc/control/session-command-interface-proxy.hpp"
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/* ==================== GuiNotification ================================ */
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#include "gui/notification-interface-proxy.hpp"
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/* ==================== gui::Display =================================== */
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#include "gui/display-interface-proxy.hpp"
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/* ==================== DummyPlayer ==================================== */
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#include "proc/play/dummy-player-interface-proxy.hpp"
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