src/CommRead.h

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