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connection.cpp

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00001 /***************************************************************************
00002  *   Copyright (C) 2004-2006 by Ilya A. Volynets-Evenbakh                  *
00003  *   ilya@total-knowledge.com                                              *
00004  *                                                                         *
00005  *   This program is free software; you can redistribute it and/or modify  *
00006  *   it under the terms of the GNU General Public License as published by  *
00007  *   the Free Software Foundation; either version 2 of the License, or     *
00008  *   (at your option) any later version.                                   *
00009  *                                                                         *
00010  *   This program is distributed in the hope that it will be useful,       *
00011  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
00012  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
00013  *   GNU General Public License for more details.                          *
00014  *                                                                         *
00015  *   You should have received a copy of the GNU General Public License     *
00016  *   along with this program; if not, write to the                         *
00017  *   Free Software Foundation, Inc.,                                       *
00018  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
00019  ***************************************************************************/
00020 #include "connection.h"
00021 #include "requestlistener.h"
00022 #include <sptk4/CGuard.h>
00023 
00024 namespace container {
00025 
00026 Connection::Connection(int sock)
00027     : sockbuf(sock)
00028     , m_limit(-1)
00029 {
00030 }
00031 
00032 
00033 Connection::~Connection()
00034 {
00035     try {
00036         overflow(eof);
00037     } catch (...) {
00038     }
00039     try {
00040         shutdown(shut_readwrite);
00041     } catch (...) {
00042     }
00043 }
00044 
00045 sockbuf::int_type Connection::underflow()
00046 {
00047     static sptk::CWaiter lock;
00048     sptk::CGuard guard(lock);
00049     if(m_limit==0) {
00050         return eof;
00051     }
00052     sockbuf::int_type ret = sockbuf::underflow();
00053     checkLimit();
00054     return ret;
00055 }
00056 
00057 void Connection::setLimit(long lim)
00058 {
00059     m_limit=lim;
00060     checkLimit();
00061 }
00062 
00063 void Connection::checkLimit()
00064 {
00065     if(m_limit!=-1) {
00066         m_limit-=egptr()-gptr();
00067         if(m_limit<0) {
00068             setg(eback(), gptr(), egptr()+m_limit);
00069             m_limit=0; //Next underflow will fail. This may read a bit more data, but not too much
00070         }
00071     }
00072 }
00073 
00074 }

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