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.
20 /** @file src/job_manager.cc
21 * @brief A simple scheduler for jobs.
25 #include <boost/thread.hpp>
26 #include "job_manager.h"
33 using boost::shared_ptr;
34 using boost::weak_ptr;
36 JobManager* JobManager::_instance = 0;
38 JobManager::JobManager ()
40 , _last_active_jobs (false)
41 , _scheduler (new boost::thread (boost::bind (&JobManager::scheduler, this)))
46 JobManager::~JobManager ()
49 boost::mutex::scoped_lock lm (_mutex);
53 if (_scheduler->joinable ()) {
59 JobManager::add (shared_ptr<Job> j)
62 boost::mutex::scoped_lock lm (_mutex);
66 emit (boost::bind (boost::ref (JobAdded), weak_ptr<Job> (j)));
71 list<shared_ptr<Job> >
72 JobManager::get () const
74 boost::mutex::scoped_lock lm (_mutex);
79 JobManager::work_to_do () const
81 boost::mutex::scoped_lock lm (_mutex);
82 list<shared_ptr<Job> >::const_iterator i = _jobs.begin();
83 while (i != _jobs.end() && (*i)->finished()) {
87 return i != _jobs.end ();
91 JobManager::errors () const
93 boost::mutex::scoped_lock lm (_mutex);
94 for (list<shared_ptr<Job> >::const_iterator i = _jobs.begin(); i != _jobs.end(); ++i) {
95 if ((*i)->finished_in_error ()) {
104 JobManager::scheduler ()
108 bool active_jobs = false;
111 boost::mutex::scoped_lock lm (_mutex);
116 for (list<shared_ptr<Job> >::iterator i = _jobs.begin(); i != _jobs.end(); ++i) {
118 if (!(*i)->finished ()) {
122 if ((*i)->running ()) {
123 /* Something is already happening */
127 if ((*i)->is_new()) {
130 /* Only start one job at once */
136 if (active_jobs != _last_active_jobs) {
137 _last_active_jobs = active_jobs;
138 emit (boost::bind (boost::ref (ActiveJobsChanged), active_jobs));
146 JobManager::instance ()
148 if (_instance == 0) {
149 _instance = new JobManager ();