/*---------------------------------------------------------------
 * Copyright (c) 2019
 * Broadcom Corporation
 * All Rights Reserved.
 *---------------------------------------------------------------
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 * obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software
 * without restriction, including without limitation the
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 * persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 *
 * Redistributions of source code must retain the above
 * copyright notice, this list of conditions and
 * the following disclaimers.
 *
 *
 * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following
 * disclaimers in the documentation and/or other materials
 * provided with the distribution.
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 *
 * Neither the name of Broadcom Coporation,
 * nor the names of its contributors may be used to endorse
 * or promote products derived from this Software without
 * specific prior written permission.
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 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE CONTIBUTORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * ________________________________________________________________
 *
 * packet_ring.h
 * Suppport for packet rings between threads
 *
 * by Robert J. McMahon (rjmcmahon@rjmcmahon.com, bob.mcmahon@broadcom.com)
 * -------------------------------------------------------------------
 */
#ifndef PACKETRINGC_H
#define PACKETRINGC_H

#include "Condition.h"
#include "gettcpinfo.h"

#ifdef __cplusplus
extern "C" {
#endif

#define ACKRING_DEFAULTSIZE 100

struct ReportStruct {
    intmax_t packetID;
    intmax_t packetLen;
    struct timeval packetTime;
    struct timeval prevPacketTime;
    struct timeval sentTime;
    struct timeval prevSentTime;
    int errwrite;
    int emptyreport;
    int l2errors;
    int l2len;
    int expected_l2len;
    struct timeval isochStartTime;
    intmax_t prevframeID;
    intmax_t frameID;
    intmax_t burstsize;
    intmax_t burstperiod;
    intmax_t remaining;
    int transit_ready;
    int writecnt;
    long write_time;
    struct timeval sentTimeRX;
    struct timeval sentTimeTX;
    struct iperf_tcpstats tcpstats;
};

struct PacketRing {
    // producer and consumer
    // must be an atomic type, e.g. int
    // otherwise reads/write can be torn
    int producer;
    int consumer;
    int maxcount;
    int consumerdone;
    int awaitcounter;
    int mutex_enable;
    int bytes;

    // Use a condition variables
    // o) awake_producer - producer waits for the consumer thread to
    //    make space or end (signaled by the consumer)
    // o) awake_consumer - signal the consumer thread to to run
    //    (signaled by the producer)
    struct Condition *awake_producer;
    struct Condition *awake_consumer;
    struct ReportStruct *data;
};

extern struct PacketRing * packetring_init(int count, struct Condition *awake_consumer, struct Condition *awake_producer);
extern void packetring_enqueue(struct PacketRing *pr, struct ReportStruct *metapacket);
extern struct ReportStruct *packetring_dequeue(struct PacketRing * pr);
extern void enqueue_ackring(struct PacketRing *pr, struct ReportStruct *metapacket);
extern struct ReportStruct *dequeue_ackring(struct PacketRing * pr);
extern void packetring_free(struct PacketRing *pr);
extern void free_ackring(struct PacketRing *pr);
#ifdef HAVE_THREAD_DEBUG
extern int packetring_getcount(struct PacketRing *pr);
#endif

#ifdef __cplusplus
} /* end extern "C" */
#endif

#endif // PACKETRINGC_H
