src/CommRead.h

   1 /*
   2  * $Id$
   3  *
   4  * DEBUG: section 05    Comm
   5  * AUTHOR: Robert Collins <robertc@squid-cache.org>
   6  *
   7  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   8  * ----------------------------------------------------------
   9  *
  10  *  Squid is the result of efforts by numerous individuals from
  11  *  the Internet community; see the CONTRIBUTORS file for full
  12  *  details.   Many organizations have provided support for Squid's
  13  *  development; see the SPONSORS file for full details.  Squid is
  14  *  Copyrighted (C) 2001 by the Regents of the University of
  15  *  California; see the COPYRIGHT file for full details.  Squid
  16  *  incorporates software developed and/or copyrighted by other
  17  *  sources; see the CREDITS file for full details.
  18  *
  19  *  This program is free software; you can redistribute it and/or modify
  20  *  it under the terms of the GNU General Public License as published by
  21  *  the Free Software Foundation; either version 2 of the License, or
  22  *  (at your option) any later version.
  23  *
  24  *  This program is distributed in the hope that it will be useful,
  25  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27  *  GNU General Public License for more details.
  28  *
  29  *  You should have received a copy of the GNU General Public License
  30  *  along with this program; if not, write to the Free Software
  31  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  32  *
  33  *
  34  * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org>
  35  */
  36 #ifndef COMMREAD_H
  37 #define COMMREAD_H
  38
  39 #include "squid.h"
  40 #include "comm.h"
  41 #include "CommCalls.h"
  42 #include "CbDataList.h"
  43
  44 class CommRead
  45 {
  46
  47 public:
  48     CommRead ();
  49     CommRead (int fd, char *buf, int len, AsyncCall::Pointer &callback);
  50     int fd;
  51     char *buf;
  52     int len;
  53     AsyncCall::Pointer callback;
  54 };
  55
  56 class DeferredRead
  57 {
  58
  59 public:
  60     typedef void DeferrableRead(void *context, CommRead const &);
  61     DeferredRead ();
  62     DeferredRead (DeferrableRead *, void *, CommRead const &);
  63     void markCancelled();
  64     DeferrableRead *theReader;
  65     void *theContext;
  66     CommRead theRead;
  67     bool cancelled;
  68     AsyncCall::Pointer closer; ///< internal close handler used by Comm
  69
  70 private:
  71 };
  72
  73 class DeferredReadManager
  74 {
  75
  76 public:
  77     ~DeferredReadManager();
  78     void delayRead(DeferredRead const &);
  79     void kickReads(int const count);
  80
  81 private:
  82     static PF CloseHandler;
  83     static DeferredRead popHead(CbDataListContainer<DeferredRead> &deferredReads);
  84     void kickARead(DeferredRead const &);
  85     void flushReads();
  86     CbDataListContainer<DeferredRead> deferredReads;
  87 };
  88
  89
  90 #endif /* COMMREAD_H */