/*
 Itay Marom
 Cisco Systems, Inc.
*/

/*
Copyright (c) 2015-2015 Cisco Systems, Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#ifndef __TREX_STREAM_NODE_H__
#define __TREX_STREAM_NODE_H__

#include <bp_sim.h>
#include <stdio.h>

class TrexStatelessDpCore;
#include <trex_stream.h>

/* this is a event for stateless */
struct CGenNodeStateless : public CGenNodeBase  {
friend class TrexStatelessDpCore;

private:
    void *              m_cache_mbuf;

    double              m_next_time_offset; /* in sec */
    double              m_ibg_sec; /* inter burst time in sec */


    uint8_t             m_is_stream_active;
    uint8_t             m_port_id;
    uint8_t             m_stream_type; /* TrexStream::STREAM_TYPE */
    uint8_t             m_pad;

    uint32_t            m_single_burst; /* the number of bursts in case of burst */
    uint32_t            m_single_burst_refill; 

    uint32_t            m_multi_bursts; /* in case of multi_burst how many bursts */



    /* pad to match the size of CGenNode */
    uint8_t             m_pad_end[65];


public:

    inline uint8_t  get_stream_type(){
        return (m_stream_type);
    }

    inline uint32_t   get_single_burst_cnt(){
        return (m_single_burst);
    }

    inline double   get_multi_ibg_sec(){
        return (m_ibg_sec);
    }

    inline uint32_t   get_multi_burst_cnt(){
        return (m_multi_bursts);
    }


    inline bool is_active() {
        return m_is_stream_active;
    }


    inline void handle_continues(CFlowGenListPerThread *thread) {
        thread->m_node_gen.m_v_if->send_node( (CGenNode *)this);

        /* in case of continues */
        m_time += m_next_time_offset;

        /* insert a new event */
        thread->m_node_gen.m_p_queue.push( (CGenNode *)this);
    }

    inline void handle_multi_burst(CFlowGenListPerThread *thread) {
        thread->m_node_gen.m_v_if->send_node( (CGenNode *)this);

        m_single_burst--;
        if (m_single_burst > 0 ) {
            /* in case of continues */
            m_time += m_next_time_offset;

            thread->m_node_gen.m_p_queue.push( (CGenNode *)this);
        }else{
            m_multi_bursts--;
            if ( m_multi_bursts == 0 ) {
                /* stop */
                m_is_stream_active =0;
            }else{
                m_time += m_ibg_sec;
                m_single_burst = m_single_burst_refill;

            }
            thread->m_node_gen.m_p_queue.push( (CGenNode *)this);
        }
    }

        
    /**
     * main function to handle an event of a packet tx
     * 
     * 
     * 
     */

    inline void handle(CFlowGenListPerThread *thread) {

        if (m_stream_type == TrexStream::stCONTINUOUS ) {
            handle_continues(thread) ;
        }else{
            if (m_stream_type == TrexStream::stMULTI_BURST) {
                handle_multi_burst(thread);
            }else{
                assert(0);
            }
        }

    }

    void set_socket_id(socket_id_t socket){
        m_socket_id=socket;
    }

    socket_id_t get_socket_id(){
        return ( m_socket_id );
    }

    inline void set_mbuf_cache_dir(pkt_dir_t  dir){
        if (dir) {
            m_flags |=NODE_FLAGS_DIR;
        }else{
            m_flags &=~NODE_FLAGS_DIR;
        }
    }

    inline pkt_dir_t get_mbuf_cache_dir(){
        return ((pkt_dir_t)( m_flags &1));
    }

    inline void set_cache_mbuf(rte_mbuf_t * m){
        m_cache_mbuf=(void *)m;
        m_flags |= NODE_FLAGS_MBUF_CACHE;
    }

    inline rte_mbuf_t * get_cache_mbuf(){
        if ( m_flags &NODE_FLAGS_MBUF_CACHE ) {
            return ((rte_mbuf_t *)m_cache_mbuf);
        }else{
            return ((rte_mbuf_t *)0);
        }
    }

    void free_stl_node();


    void Dump(FILE *fd){
        fprintf(fd," %f, %lu, %lu \n",m_time,(ulong)m_port_id,(ulong)get_mbuf_cache_dir());
    }

} __rte_cache_aligned;

static_assert(sizeof(CGenNodeStateless) == sizeof(CGenNode), "sizeof(CGenNodeStateless) != sizeof(CGenNode)" );




#endif /* __TREX_STREAM_NODE_H__ */