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Annotation of fam/fam/MxClient.h, Revision 1.1

1.1     ! trev        1: //  Copyright (C) 1999 Silicon Graphics, Inc.  All Rights Reserved.
        !             2: //
        !             3: //  This program is free software; you can redistribute it and/or modify it
        !             4: //  under the terms of version 2 of the GNU General Public License as
        !             5: //  published by the Free Software Foundation.
        !             6: //
        !             7: //  This program is distributed in the hope that it would be useful, but
        !             8: //  WITHOUT ANY WARRANTY; without even the implied warranty of
        !             9: //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  Further, any
        !            10: //  license provided herein, whether implied or otherwise, is limited to
        !            11: //  this program in accordance with the express provisions of the GNU
        !            12: //  General Public License.  Patent licenses, if any, provided herein do not
        !            13: //  apply to combinations of this program with other product or programs, or
        !            14: //  any other product whatsoever.  This program is distributed without any
        !            15: //  warranty that the program is delivered free of the rightful claim of any
        !            16: //  third person by way of infringement or the like.  See the GNU General
        !            17: //  Public License for more details.
        !            18: //
        !            19: //  You should have received a copy of the GNU General Public License along
        !            20: //  with this program; if not, write the Free Software Foundation, Inc., 59
        !            21: //  Temple Place - Suite 330, Boston MA 02111-1307, USA.
        !            22:
        !            23: #ifndef MxClient_included
        !            24: #define MxClient_included
        !            25:
        !            26: #include "Client.h"
        !            27: #include "RequestMap.h"
        !            28:
        !            29: class ClientInterest;
        !            30:
        !            31: //  MxClient is a multiplexed client (one with more than one request
        !            32: //  outstanding).  It an an abstract base type whose most famous
        !            33: //  derived class is TCP_Client.
        !            34: //
        !            35: //  An MxClient maps Requests to ClientInterests.  It also implements
        !            36: //  (part of) the suspend/resume protocol.
        !            37: //
        !            38: //  In a glorious spasm of overengineering, I implemented the table of
        !            39: //  requests as an in-core B-Tree.  Why?  Because a B-Tree scales
        !            40: //  really well and because it has good locality of reference.
        !            41:
        !            42: class MxClient : public Client {
        !            43:
        !            44: protected:
        !            45:
        !            46:     MxClient(in_addr host);
        !            47:     ~MxClient();
        !            48:
        !            49:     void monitor_file(Request, const char *path, const Cred&);
        !            50:     void monitor_dir(Request, const char *path, const Cred&);
        !            51:     void cancel(Request);
        !            52:     void suspend(Request);
        !            53:     void resume(Request);
        !            54:
        !            55: private:
        !            56:
        !            57:     RequestMap requests;
        !            58:
        !            59:     ClientInterest *interest(Request);
        !            60:     bool check_new(Request, const char *path);
        !            61:
        !            62: };
        !            63:
        !            64: #endif /* !MxClient_included */