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 DCPOMATIC_JOB_H
25 #define DCPOMATIC_JOB_H
27 #include <boost/thread/mutex.hpp>
28 #include <boost/enable_shared_from_this.hpp>
29 #include <boost/signals2.hpp>
30 #include <boost/thread.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>, public boost::noncopyable
41 Job (boost::shared_ptr<const Film>);
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;
55 bool running () const;
56 bool finished () const;
57 bool finished_ok () const;
58 bool finished_in_error () const;
59 bool finished_cancelled () const;
62 std::string error_summary () const;
63 std::string error_details () const;
65 int elapsed_time () const;
66 virtual std::string status () const;
67 std::string sub_name () const {
71 void set_progress_unknown ();
72 void set_progress (float, bool force = false);
73 void sub (std::string);
74 boost::optional<float> progress () const;
76 boost::shared_ptr<const Film> film () const {
80 boost::signals2::signal<void()> Progress;
81 /** Emitted from the UI thread when the job is finished */
82 boost::signals2::signal<void()> Finished;
86 virtual int remaining_time () const;
88 /** Description of a job's state */
90 NEW, ///< the job hasn't been started yet
91 RUNNING, ///< the job is running
92 PAUSED, ///< the job has been paused
93 FINISHED_OK, ///< the job has finished successfully
94 FINISHED_ERROR, ///< the job has finished in error
95 FINISHED_CANCELLED ///< the job was cancelled
98 void set_state (State);
99 void set_error (std::string s, std::string d);
101 boost::shared_ptr<const Film> _film;
107 boost::thread* _thread;
109 /** mutex for _state and _error */
110 mutable boost::mutex _state_mutex;
111 /** current state of the job */
113 /** summary of an error that has occurred (when state == FINISHED_ERROR) */
114 std::string _error_summary;
115 std::string _error_details;
117 /** time that this sub-job was started */
119 std::string _sub_name;
121 /** mutex for _progress */
122 mutable boost::mutex _progress_mutex;
123 boost::optional<float> _progress;
125 /** condition to signal changes to pause/resume so that we know when to wake;
126 this could be a general _state_change if it made more sense.
128 boost::condition_variable _pause_changed;