connection.cpp

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/***************************************************************************
 *   Copyright (C) 2004-2006 by Ilya A. Volynets-Evenbakh                  *
 *   ilya@total-knowledge.com                                              *
 *                                                                         *
 *   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; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   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.,                                       *
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 ***************************************************************************/
#include "connection.h"
#include "requestlistener.h"
#include <sptk4/CGuard.h>

namespace container {

Connection::Connection(int sock)
    : sockbuf(sock)
    , m_limit(-1)
{
}


Connection::~Connection()
{
    try {
        overflow(eof);
    } catch (...) {
    }
    try {
        shutdown(shut_readwrite);
    } catch (...) {
    }
}

sockbuf::int_type Connection::underflow()
{
    static sptk::CWaiter lock;
    sptk::CGuard guard(lock);
    if(m_limit==0) {
        return eof;
    }
    sockbuf::int_type ret = sockbuf::underflow();
    checkLimit();
    return ret;
}

void Connection::setLimit(long lim)
{
    m_limit=lim;
    checkLimit();
}

void Connection::checkLimit()
{
    if(m_limit!=-1) {
        m_limit-=egptr()-gptr();
        if(m_limit<0) {
            setg(eback(), gptr(), egptr()+m_limit);
            m_limit=0; //Next underflow will fail. This may read a bit more data, but not too much
        }
    }
}

}