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1 /* | 1 /* |
2 * Copyright (C) 2011 University of Szeged | 2 * Copyright (C) 2011 University of Szeged |
3 * Copyright (C) 2011 Gabor Loki <loki@webkit.org> | 3 * Copyright (C) 2011 Gabor Loki <loki@webkit.org> |
4 * All rights reserved. | 4 * All rights reserved. |
5 * | 5 * |
6 * Redistribution and use in source and binary forms, with or without | 6 * Redistribution and use in source and binary forms, with or without |
7 * modification, are permitted provided that the following conditions | 7 * modification, are permitted provided that the following conditions |
8 * are met: | 8 * are met: |
9 * 1. Redistributions of source code must retain the above copyright | 9 * 1. Redistributions of source code must retain the above copyright |
10 * notice, this list of conditions and the following disclaimer. | 10 * notice, this list of conditions and the following disclaimer. |
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57 template<typename Type> | 57 template<typename Type> |
58 class ParallelJobs { | 58 class ParallelJobs { |
59 WTF_MAKE_NONCOPYABLE(ParallelJobs); | 59 WTF_MAKE_NONCOPYABLE(ParallelJobs); |
60 WTF_MAKE_FAST_ALLOCATED; | 60 WTF_MAKE_FAST_ALLOCATED; |
61 public: | 61 public: |
62 typedef void (*WorkerFunction)(Type*); | 62 typedef void (*WorkerFunction)(Type*); |
63 | 63 |
64 ParallelJobs(WorkerFunction func, size_t requestedJobNumber) | 64 ParallelJobs(WorkerFunction func, size_t requestedJobNumber) |
65 : m_func(func) | 65 : m_func(func) |
66 { | 66 { |
67 size_t numberOfJobs = std::max(static_cast<size_t>(2), std::min(requeste
dJobNumber, blink::Platform::current()->numberOfProcessors())); | 67 size_t numberOfJobs = std::max(static_cast<size_t>(2), std::min(requeste
dJobNumber, Platform::current()->numberOfProcessors())); |
68 m_parameters.grow(numberOfJobs); | 68 m_parameters.grow(numberOfJobs); |
69 // The main thread can execute one job, so only create requestJobNumber
- 1 threads. | 69 // The main thread can execute one job, so only create requestJobNumber
- 1 threads. |
70 for (size_t i = 0; i < numberOfJobs - 1; ++i) { | 70 for (size_t i = 0; i < numberOfJobs - 1; ++i) { |
71 OwnPtr<blink::WebThread> thread = adoptPtr(blink::Platform::current(
)->createThread("Unfortunate parallel worker")); | 71 OwnPtr<WebThread> thread = adoptPtr(Platform::current()->createThrea
d("Unfortunate parallel worker")); |
72 m_threads.append(thread.release()); | 72 m_threads.append(thread.release()); |
73 } | 73 } |
74 } | 74 } |
75 | 75 |
76 size_t numberOfJobs() | 76 size_t numberOfJobs() |
77 { | 77 { |
78 return m_parameters.size(); | 78 return m_parameters.size(); |
79 } | 79 } |
80 | 80 |
81 Type& parameter(size_t i) | 81 Type& parameter(size_t i) |
82 { | 82 { |
83 return m_parameters[i]; | 83 return m_parameters[i]; |
84 } | 84 } |
85 | 85 |
86 void execute() | 86 void execute() |
87 { | 87 { |
88 for (size_t i = 0; i < numberOfJobs() - 1; ++i) | 88 for (size_t i = 0; i < numberOfJobs() - 1; ++i) |
89 m_threads[i]->postTask(new Task(WTF::bind(m_func, ¶meter(i)))); | 89 m_threads[i]->postTask(new Task(WTF::bind(m_func, ¶meter(i)))); |
90 m_func(¶meter(numberOfJobs() - 1)); | 90 m_func(¶meter(numberOfJobs() - 1)); |
91 m_threads.clear(); | 91 m_threads.clear(); |
92 } | 92 } |
93 | 93 |
94 private: | 94 private: |
95 WorkerFunction m_func; | 95 WorkerFunction m_func; |
96 Vector<OwnPtr<blink::WebThread> > m_threads; | 96 Vector<OwnPtr<WebThread> > m_threads; |
97 Vector<Type> m_parameters; | 97 Vector<Type> m_parameters; |
98 }; | 98 }; |
99 | 99 |
100 } // namespace blink | 100 } // namespace blink |
101 | 101 |
102 #endif // ParallelJobs_h | 102 #endif // ParallelJobs_h |
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