/*****************************************************************************
Copyright © 2001 - 2007, The Board of Trustees of the University of Illinois.
All Rights Reserved.
UDP-based Data Transfer Library (UDT) special version UDT-m
National Center for Data Mining (NCDM)
University of Illinois at Chicago
http://www.ncdm.uic.edu/
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or (at
your option) any later version.
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.,
59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*****************************************************************************/
/*****************************************************************************
This header file contains the definition of List structures used in UDT.
*****************************************************************************/
/*****************************************************************************
written by
Yunhong Gu [gu@lac.uic.edu], last updated 03/16/2007
*****************************************************************************/
#ifndef __UDT_LIST_H__
#define __UDT_LIST_H__
#include "udt.h"
#include "common.h"
class CSndLossList
{
public:
CSndLossList(const int& size);
~CSndLossList();
// Functionality:
// Insert a seq. no. into the sender loss list.
// Parameters:
// 0) [in] seqno1: sequence number starts.
// 1) [in] seqno2: sequence number ends.
// Returned value:
// number of packets that are not in the list previously.
int insert(const int32_t& seqno1, const int32_t& seqno2);
// Functionality:
// Remove ALL the seq. no. that are not greater than the parameter.
// Parameters:
// 0) [in] seqno: sequence number.
// Returned value:
// None.
void remove(const int32_t& seqno);
// Functionality:
// Read the loss length.
// Parameters:
// None.
// Returned value:
// The length of the list.
int getLossLength();
// Functionality:
// Read the first (smallest) loss seq. no. in the list and remove it.
// Parameters:
// None.
// Returned value:
// The seq. no. or -1 if the list is empty.
int32_t getLostSeq();
private:
int32_t* m_piData1; // sequence number starts
int32_t* m_piData2; // seqnence number ends
int* m_piNext; // next node in the list
int m_iHead; // first node
int m_iLength; // loss length
int m_iSize; // size of the static array
int m_iLastInsertPos; // position of last insert node
pthread_mutex_t m_ListLock; // used to synchronize list operation
};
////////////////////////////////////////////////////////////////////////////////
class CRcvLossList
{
public:
CRcvLossList(const int& size);
~CRcvLossList();
// Functionality:
// Insert a series of loss seq. no. between "seqno1" and "seqno2" into the receiver's loss list.
// Parameters:
// 0) [in] seqno1: sequence number starts.
// 1) [in] seqno2: seqeunce number ends.
// Returned value:
// None.
void insert(const int32_t& seqno1, const int32_t& seqno2);
// Functionality:
// Remove a loss seq. no. from the receiver's loss list.
// Parameters:
// 0) [in] seqno: sequence number.
// Returned value:
// if the packet is removed (true) or no such lost packet is found (false).
bool remove(const int32_t& seqno);
// Functionality:
// Remove all packets between seqno1 and seqno2.
// Parameters:
// 0) [in] seqno1: start sequence number.
// 1) [in] seqno2: end sequence number.
// Returned value:
// if the packet is removed (true) or no such lost packet is found (false).
bool remove(const int32_t& seqno1, const int32_t& seqno2);
// Functionality:
// Find if there is any lost packets whose sequence number falling seqno1 and seqno2.
// Parameters:
// 0) [in] seqno1: start sequence number.
// 1) [in] seqno2: end sequence number.
// Returned value:
// True if found; otherwise false.
bool find(const int32_t& seqno1, const int32_t& seqno2) const;
// Functionality:
// Read the loss length.
// Parameters:
// None.
// Returned value:
// the length of the list.
int getLossLength() const;
// Functionality:
// Read the first (smallest) seq. no. in the list.
// Parameters:
// None.
// Returned value:
// the sequence number or -1 if the list is empty.
int getFirstLostSeq() const;
// Functionality:
// Get a encoded loss array for NAK report.
// Parameters:
// 0) [out] array: the result list of seq. no. to be included in NAK.
// 1) [out] physical length of the result array.
// 2) [in] limit: maximum length of the array.
// 3) [in] threshold: Time threshold from last NAK report.
// Returned value:
// None.
void getLossArray(int32_t* array, int& len, const int& limit, const int& threshold);
private:
int32_t* m_piData1; // sequence number starts
int32_t* m_piData2; // sequence number ends
int* m_piNext; // next node in the list
int* m_piPrior; // prior node in the list;
int m_iHead; // first node in the list
int m_iTail; // last node in the list;
int m_iLength; // loss length
int m_iSize; // size of the static array
uint64_t m_TimeStamp; // last list update time or NAK feedback time
};
#endif