1/*
2 * Copyright (C) 2011 University of Szeged
3 * Copyright (C) 2011 Gabor Loki <loki@webkit.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY UNIVERSITY OF SZEGED ``AS IS'' AND ANY
16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL UNIVERSITY OF SZEGED OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#ifndef ParallelJobsGeneric_h
29#define ParallelJobsGeneric_h
30
31#if ENABLE(THREADING_GENERIC)
32
33#include <wtf/Condition.h>
34#include <wtf/Lock.h>
35#include <wtf/RefCounted.h>
36#include <wtf/Threading.h>
37
38namespace WTF {
39
40class ParallelEnvironment {
41 WTF_MAKE_FAST_ALLOCATED;
42public:
43 typedef void (*ThreadFunction)(void*);
44
45 WTF_EXPORT_PRIVATE ParallelEnvironment(ThreadFunction, size_t sizeOfParameter, int requestedJobNumber);
46
47 int numberOfJobs()
48 {
49 return m_numberOfJobs;
50 }
51
52 WTF_EXPORT_PRIVATE void execute(void* parameters);
53
54 class ThreadPrivate : public RefCounted<ThreadPrivate> {
55 public:
56 bool tryLockFor(ParallelEnvironment*);
57
58 void execute(ThreadFunction, void*);
59
60 void waitForFinish();
61
62 static Ref<ThreadPrivate> create()
63 {
64 return adoptRef(*new ThreadPrivate());
65 }
66
67 private:
68 RefPtr<Thread> m_thread;
69 bool m_running { false };
70 ParallelEnvironment* m_parent { nullptr };
71
72 mutable Lock m_mutex;
73 Condition m_threadCondition;
74
75 ThreadFunction m_threadFunction { nullptr };
76 void* m_parameters { nullptr };
77 };
78
79private:
80 ThreadFunction m_threadFunction;
81 size_t m_sizeOfParameter;
82 int m_numberOfJobs;
83
84 Vector< RefPtr<ThreadPrivate> > m_threads;
85 static Vector< RefPtr<ThreadPrivate> >* s_threadPool;
86};
87
88} // namespace WTF
89
90#endif // ENABLE(THREADING_GENERIC)
91
92
93#endif // ParallelJobsGeneric_h
94