src/CompletionDispatcher.h

   1
   2 /*
   3  * $Id$
   4  *
   5  *
   6  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   7  * ----------------------------------------------------------
   8  *
   9  *  Squid is the result of efforts by numerous individuals from
  10  *  the Internet community; see the CONTRIBUTORS file for full
  11  *  details.   Many organizations have provided support for Squid's
  12  *  development; see the SPONSORS file for full details.  Squid is
  13  *  Copyrighted (C) 2001 by the Regents of the University of
  14  *  California; see the COPYRIGHT file for full details.  Squid
  15  *  incorporates software developed and/or copyrighted by other
  16  *  sources; see the CREDITS file for full details.
  17  *
  18  *  This program is free software; you can redistribute it and/or modify
  19  *  it under the terms of the GNU General Public License as published by
  20  *  the Free Software Foundation; either version 2 of the License, or
  21  *  (at your option) any later version.
  22  *
  23  *  This program is distributed in the hope that it will be useful,
  24  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  *  GNU General Public License for more details.
  27  *
  28  *  You should have received a copy of the GNU General Public License
  29  *  along with this program; if not, write to the Free Software
  30  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  31  *
  32  */
  33
  34 #ifndef SQUID_COMPLETIONDISPATCHER_H
  35 #define SQUID_COMPLETIONDISPATCHER_H
  36
  37 #include "squid-old.h"
  38
  39
  40 /* Dispatch code to handle events that have completed. Completed events are queued
  41  * with a completion dispatcher by the OS Async engine - i.e. the poll or kqueue or
  42  * select loop, or a signal reciever, or the diskd/diskthreads/etc modules.
  43  */
  44
  45 class CompletionDispatcher
  46 {
  47
  48 public:
  49
  50     virtual ~CompletionDispatcher() {}
  51
  52     /* dispatch events. This should return true if there were events dispatched
  53      * between the last call to dispatch() returning and this call returning.
  54      */
  55     virtual bool dispatch() = 0;
  56 };
  57
  58 #endif /* SQUID_COMPLETIONDISPATCHER_H */