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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/RefCounted.h> | |
34 #include <wtf/Threading.h> | |
35 | |
36 namespace WTF { | |
37 | |
38 class ParallelEnvironment { | |
39 WTF_MAKE_FAST_ALLOCATED; | |
40 public: | |
41 typedef void (*ThreadFunction)(void*); | |
42 | |
43 WTF_EXPORT_PRIVATE ParallelEnvironment(ThreadFunction, size_t sizeOfParamete
r, int requestedJobNumber); | |
44 | |
45 int numberOfJobs() | |
46 { | |
47 return m_numberOfJobs; | |
48 } | |
49 | |
50 WTF_EXPORT_PRIVATE void execute(void* parameters); | |
51 | |
52 class ThreadPrivate : public RefCounted<ThreadPrivate> { | |
53 public: | |
54 ThreadPrivate() | |
55 : m_threadID(0) | |
56 , m_running(false) | |
57 , m_parent(0) | |
58 { | |
59 } | |
60 | |
61 bool tryLockFor(ParallelEnvironment*); | |
62 | |
63 void execute(ThreadFunction, void*); | |
64 | |
65 void waitForFinish(); | |
66 | |
67 static PassRefPtr<ThreadPrivate> create() | |
68 { | |
69 return adoptRef(new ThreadPrivate()); | |
70 } | |
71 | |
72 static void workerThread(void*); | |
73 | |
74 private: | |
75 ThreadIdentifier m_threadID; | |
76 bool m_running; | |
77 ParallelEnvironment* m_parent; | |
78 | |
79 mutable Mutex m_mutex; | |
80 ThreadCondition m_threadCondition; | |
81 | |
82 ThreadFunction m_threadFunction; | |
83 void* m_parameters; | |
84 }; | |
85 | |
86 private: | |
87 ThreadFunction m_threadFunction; | |
88 size_t m_sizeOfParameter; | |
89 int m_numberOfJobs; | |
90 | |
91 Vector< RefPtr<ThreadPrivate> > m_threads; | |
92 static Vector< RefPtr<ThreadPrivate> >* s_threadPool; | |
93 }; | |
94 | |
95 } // namespace WTF | |
96 | |
97 #endif // ENABLE(THREADING_GENERIC) | |
98 | |
99 | |
100 #endif // ParallelJobsGeneric_h | |
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