source: source/ariba/communication/modules/transport/protlib/messages.h@ 4987

/// ----------------------------------------*- mode: C++; -*--

/// @file messages.h

/// internal messages sent between modules and other components

/// ----------------------------------------------------------

/// $Id: messages.h 3013 2008-05-15 16:12:27Z roehricht $

/// $HeadURL: https://svn.ipv6.tm.uka.de/nsis/protlib/trunk/include/messages.h $

// ===========================================================

//                      

// Copyright (C) 2005-2007, all rights reserved by

// - Institute of Telematics, Universitaet Karlsruhe (TH)

//

// More information and contact:

// https://projekte.tm.uka.de/trac/NSIS

//                      

// This program is free software; you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation; version 2 of the License

//

// This program 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 General Public License for more details.

//

// You should have received a copy of the GNU General Public License along

// with this program; if not, write to the Free Software Foundation, Inc.,

// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

//

// ===========================================================



/** @ingroup messages

 * @file

 * These messages are sent between modules and other DRM components.

 */



#ifndef _PROTLIB__MESSAGE_H_

#define _PROTLIB__MESSAGE_H_



#include <pthread.h>

#include <ext/hash_set>



#include "protlib_types.h"

#include "fqueue.h"



namespace protlib {



/** @addtogroup messages Internal Messages

 * @{

 */



// class FastQueue is declared in fqueue.h

class FastQueue;



// class Context is declared in context.h

class Context;



/// internal messages

/** Base class of all internal drm messages passed between modules. */

class message {

public:

        /// message type

        /** Each subclass of class message has its own unique type. */

        enum type_t {

                type_transport,

                type_timer,

                type_signaling,

                type_context,

                type_info,

                type_routing,

                type_API

        }; // end type_t



        /// source ID

        /** Identifies the module which sent the message.

         *  If you add an id here, please add also the corresponding string in qaddr_string

         */

        enum qaddr_t {

                qaddr_unknown, // used as return value in NSLPtable.get_address() if there is no address found

                qaddr_transport,

                qaddr_timer,

                qaddr_coordination,

                qaddr_coordination_internal,

                qaddr_signaling,

                qaddr_policy,

                qaddr_resource,

                qaddr_routing,

                qaddr_accounting,

                qaddr_router_config,

                qaddr_tp_over_sctp,

                qaddr_tp_over_tcp,

                qaddr_tp_over_tls_tcp,

                qaddr_tp_over_udp,

                qaddr_tp_queryencap,

                qaddr_qos_nslp_timerprocessing,

                qaddr_qos_nslp_coordination,

                qaddr_qos_nslp_signaling,

                qaddr_appl_qos_signaling,

                qaddr_qos_appl_signaling,

                qaddr_gui,

                qaddr_api_0,

                qaddr_api_1,

                qaddr_api_2,

                qaddr_api_3,

                qaddr_api_4,

                qaddr_api_5,

                qaddr_api_6,

                qaddr_api_7,

                qaddr_api_wrapper_input,

                qaddr_tp_over_uds,

                qaddr_uds_appl_qos      // receives messages from an external client via UDS

        }; // end qaddr_t



        /// message ID

        /** Each message has an ID.

         * Message IDs are not unique, you can use the same ID e.g. for request

         * and response. You cannot use an unused message ID, you can just reuse

         * an already used ID. ID 0 sets an unused ID.

         * Since id_t is 64-bit long, you can send 10^10 messages per seconds

         * for over 30 years without reusing an ID.

         */

        typedef gp_id_t id_t;

        /// constructor

        message(type_t t, qaddr_t s = qaddr_unknown, id_t id = 0);

        /// destructor

        virtual ~message();

        /// get ID

        id_t get_id() const;

        /// set ID or generate a new one

        id_t set_id(id_t id);

        /// get new ID

        id_t new_id();

        /// get message type

        type_t get_type() const;

        /// get source module queue

        FastQueue *get_source_queue() const;

        /// get source ID

        qaddr_t get_source() const;

        /// set source ID

        qaddr_t set_source(qaddr_t s);

        /// get name of message source

        const char* get_qaddr_name() const;

        /// get source name

        static const char* get_qaddr_name(qaddr_t s);

        /// get name of message type

        const char* get_type_name() const { return type_string[type]; }

        /// get type name

        static const char* get_type_name(type_t t) { return type_string[t]; }

        /// send the message to a queue

        bool send(qaddr_t src, FastQueue* destqueue, bool exp = false);

        /// send the message

        bool send(qaddr_t src, qaddr_t dest, bool exp = false);

        // @{

        /// send the message to dest

        bool send_to(qaddr_t dest, bool exp = false);

        bool send_to(FastQueue* destqueue, bool exp = false);

        // @}

        /// send the message back

        bool send_back(qaddr_t from, bool exp = false);

        //@{

        /// send or delete the message

        void send_or_delete(qaddr_t src, qaddr_t dest, bool exp = false) {      if (!send(src,dest,exp)) delete this; }

        void send_to_or_delete(qaddr_t dest, bool exp = false) { if (!send_to(dest,exp)) delete this; }

        void send_back_or_delete(qaddr_t src, bool exp = false) { if (!send_back(src,exp)) delete this; }

        //@}

        /// clear all pointers

        virtual void clear_pointers();

private:

        const type_t type;

        qaddr_t source;

        id_t msg_id;

        /// printable message source names

        static const char* const qaddr_string[];

        /// printable message typee names

        static const char* const type_string[];

}; // end class message







//@}



} // end namespace protlib



namespace __gnu_cxx {



/// message pointer hasher

/** Hash value is the address of the object pointed to. */

template <> struct hash<protlib::message*> {

        inline size_t operator()(protlib::message* m) const { return (size_t)m; }

}; // end msgp_hash



} // end namespace __gnu_cxx



#endif // _PROTLIB__MESSAGE_H_