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Annotation of fam/fam/ServerConnection.h, Revision 1.1.1.1

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 ServerConnection_included
                     24: #define ServerConnection_included
                     25:
                     26: #include <string.h>
                     27: #include <limits.h>
                     28: #include <sys/param.h>
                     29:
                     30: #include "ClientInterest.h"
                     31: #include "NetConnection.h"
                     32: #include "Request.h"
                     33:
                     34: class Cred;
                     35:
                     36: //  A ServerConnection implements the client side of the fam protocol,
                     37: //  and it also handles network I/O. The various requests, monitor,
                     38: //  cancel, etc., can be sent.  When FAM events arrive, the
                     39: //  EventHandler is called.
                     40: //
                     41: //  ServerConnection inherits from NetConnection.  This means that
                     42: //  users of ServerConnection can test for I/O ready
                     43: //  (ready_for_input(), ready_for_output()) and that they need to
                     44: //  specify a DisconnectHandler which will be called when the server
                     45: //  goes away.
                     46:
                     47: class ServerConnection : public NetConnection {
                     48:
                     49: public:
                     50:
                     51:     typedef void (*EventHandler)(const Event*, Request, const char *path,
                     52: 				 void *closure);
                     53:     typedef void (*DisconnectHandler)(void *closure);
                     54:
                     55:     ServerConnection(int fd, EventHandler, DisconnectHandler, void *closure);
                     56:
                     57:     void send_monitor(ClientInterest::Type, Request,
                     58: 		      const char *path, const Cred&);
                     59:     void send_cancel(Request r)		{ mprintf("C%d 0 0\n", r); }
                     60:     void send_suspend(Request r)	{ mprintf("S%d 0 0\n", r); }
                     61:     void send_resume(Request r)		{ mprintf("U%d 0 0\n", r); }
                     62:     void send_name(const char *n)	{ mprintf("N0 0 0 %s\n", n); }
                     63:
                     64: protected:
                     65:
                     66:     bool input_msg(const char *msg, unsigned nbytes);
                     67:
                     68: private:
                     69:
                     70:     EventHandler event_handler;
                     71:     DisconnectHandler disconnect_handler;
                     72:     void *closure;
                     73: };
                     74:
                     75: #endif /* !ServerConnection_included */