fabric/config.h

/* Copyright (c) 2005-2013, Stefan Eilemann <eile@equalizergraphics.com>
 *                    2010, Cedric Stalder <cedric Stalder@gmail.com>
 *                    2011, Daniel Nachbaur <danielnachbaur@gmail.com>
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License version 2.1 as published
 * by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef EQFABRIC_CONFIG_H
#define EQFABRIC_CONFIG_H

#include <eq/fabric/api.h>
#include <eq/fabric/types.h>         // typedefs
#include <eq/fabric/object.h>        // DIRTY_CUSTOM enum

namespace eq
{
namespace fabric
{
    template< class S, class C, class O, class L, class CV, class N, class V >
    class Config : public Object
    {
    public:
        typedef std::vector< O* >  Observers; 
        typedef std::vector< L* >  Layouts;   
        typedef std::vector< CV* > Canvases;  
        typedef std::vector< N* >  Nodes;     

        EQFABRIC_INL lunchbox::RefPtr< S > getServer();

        EQFABRIC_INL lunchbox::RefPtr< const S > getServer() const;

        const Observers& getObservers() const { return _observers; }

        const Layouts& getLayouts() const { return _layouts; }

        const Canvases& getCanvases() const { return _canvases; }

        EQFABRIC_INL uint32_t getTimeout() const;

        const Nodes& getNodes() const { return _nodes; }

        EQFABRIC_INL N* findAppNode(); 
        EQFABRIC_INL const N* findAppNode() const; 

        EQFABRIC_INL VisitorResult accept( V& visitor );

        EQFABRIC_INL VisitorResult accept( V& visitor ) const;

        template< typename T > EQFABRIC_INL T* find( const uint128_t& id );

        template< typename T >
        EQFABRIC_INL const T* find( const uint128_t& id ) const;

        template< typename T >
        EQFABRIC_INL T* find( const std::string& name );

        template< typename T >
        EQFABRIC_INL const T* find( const std::string& name ) const;

        O* getObserver( const ObserverPath& path );

        L* getLayout( const LayoutPath& path );

        CV* getCanvas( const CanvasPath& path );

        template< typename T > void find( const uint128_t& id, T** result );

        template< typename T > void find( const std::string& name,
                                          const T** result ) const;

        virtual void updateCanvas( CV* ) { /* NOP */ }

        virtual void exitCanvas( CV* ) { /* NOP */ }

        // Note: also update string array initialization in config.ipp

        enum FAttribute
        {
            FATTR_EYE_BASE, 
            FATTR_VERSION,  
            FATTR_LAST,
            FATTR_ALL = FATTR_LAST + 5
        };

        enum IAttribute
        {
            IATTR_ROBUSTNESS, 
            IATTR_LAST,
            IATTR_ALL = IATTR_LAST + 5
        };

        void setFAttribute( const FAttribute attr, const float value )
            { _fAttributes[attr] = value; }
        void setIAttribute( const IAttribute attr, const int32_t value )
            { _iAttributes[attr] = value; }

        float getFAttribute( const FAttribute attr ) const
            { return _fAttributes[attr]; }

        int32_t getIAttribute( const IAttribute attr ) const
            { return _iAttributes[attr]; }

        static const std::string& getFAttributeString( const FAttribute attr );
        static const std::string& getIAttributeString( const IAttribute attr );


        virtual void setLatency( const uint32_t latency );

        uint32_t getLatency() const { return _data.latency; }

        EQFABRIC_INL virtual void restore();

        virtual void output( std::ostream& ) const {} 
        void create( O** observer ); 
        void release( O* observer ); 
        void create( L** layout );   
        void release( L* layout );   
        void create( CV** canvas );  
        void release( CV* canvas );  
        void create( N** node );     
        void release( N* node );     

    protected:
        EQFABRIC_INL Config( lunchbox::RefPtr< S > parent );

        EQFABRIC_INL virtual ~Config();

        EQFABRIC_INL virtual void attach( const uint128_t& id,
                                          const uint32_t instanceID );

        EQFABRIC_INL virtual void serialize( co::DataOStream& os,
                                             const uint64_t dirtyBits );
        EQFABRIC_INL virtual void deserialize( co::DataIStream& is,
                                               const uint64_t dirtyBits );
        EQFABRIC_INL virtual void notifyDetach();

        virtual void _removeChild( const uint128_t& )
            { LBUNIMPLEMENTED; }

        template< class, class, class, class, class, class >
        friend class Server;

        void setAppNodeID( const co::NodeID& nodeID ); 

        const co::NodeID& getAppNodeID() const { return _appNodeID; }

        EQFABRIC_INL EventOCommand sendError( co::NodePtr node,
                                              const uint32_t event,
                                              const Error& error );

        virtual void changeLatency( const uint32_t ) { /* NOP */ }
        virtual bool mapViewObjects() const { return false; } 
        virtual bool mapNodeObjects() const { return false; } 

        virtual VisitorResult _acceptCompounds( V& )
            { return TRAVERSE_CONTINUE; }
        virtual VisitorResult _acceptCompounds( V& ) const
            { return TRAVERSE_CONTINUE; }
        template< class C2, class V2 >
        friend VisitorResult _acceptImpl( C2*, V2& );

        N* _findNode( const uint128_t& id ); 

        EQFABRIC_INL virtual uint128_t commit( const uint32_t incarnation =
                                               CO_COMMIT_NEXT );

    private:
        lunchbox::RefPtr< S > _server;

        float _fAttributes[FATTR_ALL];

        int32_t _iAttributes[IATTR_ALL];

        Observers _observers;

        Layouts _layouts;

        Canvases _canvases;

        Nodes _nodes;

        co::NodeID _appNodeID;

        struct BackupData
        {
            BackupData() : latency( 1 ) {}

            uint32_t latency;
        }
            _data, _backup;

        struct Private;
        Private* _private; // placeholder for binary-compatible changes

        enum DirtyBits
        {
            DIRTY_MEMBER     = Object::DIRTY_CUSTOM << 0,
            DIRTY_LATENCY    = Object::DIRTY_CUSTOM << 1,
            DIRTY_ATTRIBUTES = Object::DIRTY_CUSTOM << 2,
            DIRTY_NODES      = Object::DIRTY_CUSTOM << 3,
            DIRTY_OBSERVERS  = Object::DIRTY_CUSTOM << 4,
            DIRTY_LAYOUTS    = Object::DIRTY_CUSTOM << 5,
            DIRTY_CANVASES   = Object::DIRTY_CUSTOM << 6,
            DIRTY_CONFIG_BITS =
                DIRTY_MEMBER | DIRTY_ATTRIBUTES | DIRTY_OBSERVERS |
                DIRTY_LAYOUTS | DIRTY_CANVASES | DIRTY_NODES | DIRTY_LATENCY
        };

        virtual uint64_t getRedistributableBits() const
            { return DIRTY_CONFIG_BITS; }

        template< class, class > friend class Observer;
        void _addObserver( O* observer );
        bool _removeObserver( O* observer );

        template< class, class, class > friend class Layout;
        void _addLayout( L* layout );
        bool _removeLayout( L* layout );

        template< class, class, class, class > friend class Canvas;
        void _addCanvas( CV* canvas );
        bool _removeCanvas( CV* canvas );

        template< class, class, class, class > friend class Node;
        void _addNode( N* node );
        EQFABRIC_INL bool _removeNode( N* node );

        typedef co::CommandFunc< Config< S, C, O, L, CV, N, V > > CmdFunc;
        bool _cmdNewLayout( co::ICommand& command );
        bool _cmdNewCanvas( co::ICommand& command );
        bool _cmdNewObserver( co::ICommand& command );
        bool _cmdNewEntityReply( co::ICommand& command );
    };

    template< class S, class C, class O, class L, class CV, class N, class V >
    EQFABRIC_INL std::ostream& operator << ( std::ostream& os,
                                 const Config< S, C, O, L, CV, N, V >& config );
}
}
#endif // EQFABRIC_CONFIG_H