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/*---------------------------------------------------------------
* Copyright (c) 2019
* Broadcom Corporation
* All Rights Reserved.
*---------------------------------------------------------------
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated
* documentation files (the "Software"), to deal in the Software
* without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute,
* sublicense, and/or sell copies of the Software, and to permit
* 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.
*
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* 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,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* 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;
// isochStartTime is overloaded: first write timestamp of the frame or burst w/trip-times or very first read w/o trip-times
// reporter calculation will compute latency accordingly
struct timeval isochStartTime;
uint32_t prevframeID;
uint32_t frameID;
uint32_t burstsize;
uint32_t burstperiod;
uint32_t remaining;
int transit_ready;
int writecnt;
long write_time;
bool scheduled;
long sched_err;
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
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