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Annotation of fam/fam/Activity.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 Activity_included
                     24: #define Activity_included
                     25:
                     26: //  The Activity class is used to keep track of when fam is doing
                     27: //  something worthwhile, and when it isn't.  Currently, the only
                     28: //  worthwhile activity is talking to (non-internal) clients.  So an
                     29: //  Activity is enclosed in each TCP_Client.  When the last Activity
                     30: //  is destroyed, a death timer is started.  When the death timer
                     31: //  expires, fam expires too.
                     32: //
                     33: //  The duration of the timer can be set (timeout()), but there is
                     34: //  no other public interface to Activity.
                     35:
                     36: class Activity {
                     37:
                     38: public:
                     39:
                     40:     enum { default_timeout = 5 };	// five seconds
                     41:
                     42:     Activity();
                     43:     Activity(const Activity&);
                     44:     ~Activity();
                     45:
                     46:     static void timeout(unsigned t)	{ idle_time = t; }
                     47:
                     48: private:
                     49:
                     50:     static void task(void *);
                     51:
                     52:     static unsigned count;
                     53:     static unsigned idle_time;
                     54:
                     55: };
                     56:
                     57: #endif /* !Activity_included */