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/*
Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
DCP-o-matic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file src/job_manager.h
* @brief A simple scheduler for jobs.
*/
#include "job.h"
#include "signaller.h"
#include <boost/thread/mutex.hpp>
#include <boost/thread.hpp>
#include <boost/signals2.hpp>
#include <boost/thread/condition.hpp>
#include <list>
class Film;
class Playlist;
class Content;
struct threed_test7;
extern bool wait_for_jobs();
/** @class JobManager
* @brief A simple scheduler for jobs.
*/
class JobManager : public Signaller
{
public:
JobManager(JobManager const&) = delete;
JobManager& operator=(JobManager const&) = delete;
std::shared_ptr<Job> add(std::shared_ptr<Job>);
std::shared_ptr<Job> add_after(std::shared_ptr<Job> after, std::shared_ptr<Job> j);
std::list<std::shared_ptr<Job>> get() const;
bool work_to_do() const;
bool errors() const;
void increase_priority(std::shared_ptr<Job>);
void decrease_priority(std::shared_ptr<Job>);
void pause();
void resume();
bool paused() const {
boost::mutex::scoped_lock lm(_mutex);
return _paused;
}
std::weak_ptr<Job> last_active_job() const {
return _last_active_job;
}
void analyse_audio(
std::shared_ptr<const Film> film,
std::shared_ptr<const Playlist> playlist,
bool from_zero,
boost::signals2::connection& connection,
std::function<void(Job::Result)> ready
);
void analyse_subtitles(
std::shared_ptr<const Film> film,
std::shared_ptr<Content> content,
boost::signals2::connection& connection,
std::function<void(Job::Result)> ready
);
void cancel_all_jobs();
boost::signals2::signal<void (std::weak_ptr<Job>)> JobAdded;
boost::signals2::signal<void ()> JobsReordered;
boost::signals2::signal<void (boost::optional<std::string>, boost::optional<std::string>)> ActiveJobsChanged;
static JobManager* instance();
static void drop();
private:
/* This function is part of the test suite */
friend bool ::wait_for_jobs();
friend struct threed_test7;
JobManager();
~JobManager();
void scheduler();
void start();
void job_finished();
mutable boost::mutex _mutex;
boost::condition _schedule_condition;
/** List of jobs in the order that they will be executed */
std::list<std::shared_ptr<Job>> _jobs;
std::list<boost::signals2::connection> _connections;
bool _terminate = false;
std::weak_ptr<Job> _last_active_job;
boost::thread _scheduler;
/** true if all jobs should be paused */
bool _paused = false;
static JobManager* _instance;
};
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