| 1 | #ifndef __OUTDATED_NOTIFIER_HH__␊ |
| 2 | #define __OUTDATED_NOTIFIER_HH__␊ |
| 3 | ␊ |
| 4 | // 2007 Timothy Brownawell <tbrownaw@gmail.com>␊ |
| 5 | // GNU GPL V2 or later␊ |
| 6 | ␊ |
| 7 | // Allow clients to find out when something changes.␊ |
| 8 | // The 'something' has an outdated_indicator_factory,␊ |
| 9 | // and calls note_change() when changes are made.␊ |
| 10 | // The client is provided with an outdated_indicator made␊ |
| 11 | // from that factory, which will become outdated after␊ |
| 12 | // further changes are made to the something.␊ |
| 13 | ␊ |
| 14 | // The default indicator is always outdated.␊ |
| 15 | ␊ |
| 16 | // When a factory is destroyed, all indicators made from␊ |
| 17 | // that factory become outdated.␊ |
| 18 | ␊ |
| 19 | #include <boost/shared_ptr.hpp>␊ |
| 20 | ␊ |
| 21 | class outdated_indicator_factory_impl;␊ |
| 22 | ␊ |
| 23 | class outdated_indicator␊ |
| 24 | {␊ |
| 25 | boost::shared_ptr<outdated_indicator_factory_impl> parent;␊ |
| 26 | unsigned int when;␊ |
| 27 | public:␊ |
| 28 | outdated_indicator();␊ |
| 29 | explicit outdated_indicator(boost::shared_ptr<outdated_indicator_factory_impl> p);␊ |
| 30 | bool outdated();␊ |
| 31 | };␊ |
| 32 | ␊ |
| 33 | ␊ |
| 34 | class outdated_indicator_factory␊ |
| 35 | {␊ |
| 36 | boost::shared_ptr<outdated_indicator_factory_impl> impl;␊ |
| 37 | public:␊ |
| 38 | outdated_indicator_factory();␊ |
| 39 | ~outdated_indicator_factory();␊ |
| 40 | outdated_indicator get_indicator();␊ |
| 41 | void note_change();␊ |
| 42 | };␊ |
| 43 | ␊ |
| 44 | #endif␊ |
| 45 | ␊ |
| 46 | ␊ |
| 47 | // Local Variables:␊ |
| 48 | // mode: C++␊ |
| 49 | // fill-column: 76␊ |
| 50 | // c-file-style: "gnu"␊ |
| 51 | // indent-tabs-mode: nil␊ |
| 52 | // End:␊ |
| 53 | // vim: et:sw=2:sts=2:ts=2:cino=>2s,{s,\:s,+s,t0,g0,^-2,e-2,n-2,p2s,(0,=s:␊ |
| 54 | ␊ |
