2 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * @brief A parent class to represent long-running tasks which are run in their own thread.
24 #ifndef DVDOMATIC_JOB_H
25 #define DVDOMATIC_JOB_H
28 #include <boost/thread/mutex.hpp>
29 #include <boost/enable_shared_from_this.hpp>
30 #include <boost/signals2.hpp>
36 * @brief A parent class to represent long-running tasks which are run in their own thread.
38 class Job : public boost::enable_shared_from_this<Job>
41 Job (boost::shared_ptr<Film> s, boost::shared_ptr<Job> req);
44 /** @return user-readable name of this job */
45 virtual std::string name () const = 0;
46 /** Run this job in the current thread. */
47 virtual void run () = 0;
52 bool running () const;
53 bool finished () const;
54 bool finished_ok () const;
55 bool finished_in_error () const;
57 std::string error () const;
59 int elapsed_time () const;
60 virtual std::string status () const;
62 void set_progress_unknown ();
63 void set_progress (float);
66 float overall_progress () const;
68 boost::shared_ptr<Job> required () const {
72 boost::signals2::signal<void()> Finished;
76 virtual int remaining_time () const;
78 /** Description of a job's state */
80 NEW, ///< the job hasn't been started yet
81 RUNNING, ///< the job is running
82 FINISHED_OK, ///< the job has finished successfully
83 FINISHED_ERROR ///< the job has finished in error
86 void set_state (State);
87 void set_error (std::string e);
89 /** Film for this job */
90 boost::shared_ptr<Film> _film;
96 boost::shared_ptr<Job> _required;
98 /** mutex for _state and _error */
99 mutable boost::mutex _state_mutex;
100 /** current state of the job */
102 /** message for an error that has occurred (when state == FINISHED_ERROR) */
105 /** time that this job was started */
108 /** mutex for _stack and _progress_unknown */
109 mutable boost::mutex _progress_mutex;
112 Level (float a) : allocation (a), normalised (0) {}
118 std::list<Level> _stack;
120 /** true if this job's progress will always be unknown */
121 bool _progress_unknown;