Mercurial > hg > orthanc

annotate Core/MultiThreading/Semaphore.h @ 2165:42764dcd3a41

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
migrate the doc of ModalityWorklists to Orthanc Book
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 22 Nov 2016 13:03:15 +0100
parents 68510b1c2433
children 29689b30f9ae
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
995
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
1 /**
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
2 * Orthanc - A Lightweight, RESTful DICOM Store
1900
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1288
diff changeset
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
1288
6e7e5ed91c2d upgrade to year 2015
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 995
diff changeset
4 * Department, University Hospital of Liege, Belgium
995
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
5 *
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
6 * This program is free software: you can redistribute it and/or
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
7 * modify it under the terms of the GNU General Public License as
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
8 * published by the Free Software Foundation, either version 3 of the
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
9 * License, or (at your option) any later version.
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
10 *
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
11 * In addition, as a special exception, the copyright holders of this
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
12 * program give permission to link the code of its release with the
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
14 * that use the same license as the "OpenSSL" library), and distribute
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
15 * the linked executables. You must obey the GNU General Public License
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
16 * in all respects for all of the code used other than "OpenSSL". If you
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
17 * modify file(s) with this exception, you may extend this exception to
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
18 * your version of the file(s), but you are not obligated to do so. If
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
19 * you do not wish to do so, delete this exception statement from your
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
20 * version. If you delete this exception statement from all source files
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
21 * in the program, then also delete it here.
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
22 *
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
23 * This program is distributed in the hope that it will be useful, but
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
24 * WITHOUT ANY WARRANTY; without even the implied warranty of
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
26 * General Public License for more details.
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
27 *
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
28 * You should have received a copy of the GNU General Public License
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
30 **/
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
31
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
32
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
33 #pragma once
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
34
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
35 #include <boost/noncopyable.hpp>
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
36 #include <boost/thread.hpp>
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
37
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
38 namespace Orthanc
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
39 {
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
40 class Semaphore : public boost::noncopyable
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
41 {
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
42 private:
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
43 unsigned int count_;
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
44 boost::mutex mutex_;
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
45 boost::condition_variable condition_;
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
46
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
47 public:
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
48 explicit Semaphore(unsigned int count);
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
49
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
50 void Release();
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
51
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
52 void Acquire();
2108
68510b1c2433 Semaphore::Locker
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1900
diff changeset
53
68510b1c2433 Semaphore::Locker
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1900
diff changeset
54 class Locker : public boost::noncopyable
68510b1c2433 Semaphore::Locker
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1900
diff changeset
55 {
68510b1c2433 Semaphore::Locker
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1900
diff changeset
56 private:
68510b1c2433 Semaphore::Locker
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1900
diff changeset
57 Semaphore& that_;
68510b1c2433 Semaphore::Locker
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1900
diff changeset
58
68510b1c2433 Semaphore::Locker
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1900
diff changeset
59 public:
68510b1c2433 Semaphore::Locker
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1900
diff changeset
60 Locker(Semaphore& that) :
68510b1c2433 Semaphore::Locker
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1900
diff changeset
61 that_(that)
68510b1c2433 Semaphore::Locker
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1900
diff changeset
62 {
68510b1c2433 Semaphore::Locker
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1900
diff changeset
63 that_.Acquire();
68510b1c2433 Semaphore::Locker
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1900
diff changeset
64 }
68510b1c2433 Semaphore::Locker
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1900
diff changeset
65
68510b1c2433 Semaphore::Locker
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1900
diff changeset
66 ~Locker()
68510b1c2433 Semaphore::Locker
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1900
diff changeset
67 {
68510b1c2433 Semaphore::Locker
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1900
diff changeset
68 that_.Release();
68510b1c2433 Semaphore::Locker
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1900
diff changeset
69 }
68510b1c2433 Semaphore::Locker
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1900
diff changeset
70 };
995
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
71 };
8c67382f44a7 limit number of jobs in the scheduler
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
72 }