src/CommRead.h

   1
   2 /*
   3  * $Id$
   4  *
   5  * DEBUG: section 5     Comms
   6  * AUTHOR: Robert Collins <robertc@squid-cache.org>
   7  *
   8  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   9  * ----------------------------------------------------------
  10  *
  11  *  Squid is the result of efforts by numerous individuals from
  12  *  the Internet community; see the CONTRIBUTORS file for full
  13  *  details.   Many organizations have provided support for Squid's
  14  *  development; see the SPONSORS file for full details.  Squid is
  15  *  Copyrighted (C) 2001 by the Regents of the University of
  16  *  California; see the COPYRIGHT file for full details.  Squid
  17  *  incorporates software developed and/or copyrighted by other
  18  *  sources; see the CREDITS file for full details.
  19  *
  20  *  This program is free software; you can redistribute it and/or modify
  21  *  it under the terms of the GNU General Public License as published by
  22  *  the Free Software Foundation; either version 2 of the License, or
  23  *  (at your option) any later version.
  24  *
  25  *  This program is distributed in the hope that it will be useful,
  26  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  27  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  28  *  GNU General Public License for more details.
  29  *
  30  *  You should have received a copy of the GNU General Public License
  31  *  along with this program; if not, write to the Free Software
  32  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  33  *
  34  *
  35  * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org>
  36  */
  37
  38 #include "config.h"
  39
  40 #ifndef COMMREAD_H
  41 #define COMMREAD_H
  42
  43 #include "squid.h"
  44 #include "comm.h"
  45 #include "CommCalls.h"
  46 #include "CbDataList.h"
  47
  48 class CommRead
  49 {
  50
  51 public:
  52     CommRead ();
  53     CommRead (int fd, char *buf, int len, AsyncCall::Pointer &callback);
  54     int fd;
  55     char *buf;
  56     int len;
  57     AsyncCall::Pointer callback;
  58 };
  59
  60 class DeferredRead
  61 {
  62
  63 public:
  64     typedef void DeferrableRead(void *context, CommRead const &);
  65     DeferredRead ();
  66     DeferredRead (DeferrableRead *, void *, CommRead const &);
  67     void markCancelled();
  68     DeferrableRead *theReader;
  69     void *theContext;
  70     CommRead theRead;
  71     bool cancelled;
  72     AsyncCall::Pointer closer; ///< internal close handler used by Comm
  73
  74 private:
  75 };
  76
  77 class DeferredReadManager
  78 {
  79
  80 public:
  81     ~DeferredReadManager();
  82     void delayRead(DeferredRead const &);
  83     void kickReads(int const count);
  84
  85 private:
  86     static PF CloseHandler;
  87     static DeferredRead popHead(CbDataListContainer<DeferredRead> &deferredReads);
  88     void kickARead(DeferredRead const &);
  89     void flushReads();
  90     CbDataListContainer<DeferredRead> deferredReads;
  91 };
  92
  93
  94 #endif /* COMMREAD_H */