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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 ParallelJobs_h | |
29 #define ParallelJobs_h | |
30 | |
31 #include <wtf/Assertions.h> | |
32 #include <wtf/Noncopyable.h> | |
33 #include <wtf/RefPtr.h> | |
34 #include <wtf/Vector.h> | |
35 | |
36 // Usage: | |
37 // | |
38 // // Initialize parallel jobs | |
39 // ParallelJobs<TypeOfParameter> parallelJobs(&worker [, requestedNumberOfJo
bs]); | |
40 // | |
41 // // Fill the parameter array | |
42 // for(i = 0; i < parallelJobs.numberOfJobs(); ++i) { | |
43 // TypeOfParameter& params = parallelJobs.parameter(i); | |
44 // params.attr1 = localVars ... | |
45 // ... | |
46 // } | |
47 // | |
48 // // Execute parallel jobs | |
49 // parallelJobs.execute(); | |
50 // | |
51 | |
52 #if ENABLE(THREADING_GENERIC) | |
53 #include <wtf/ParallelJobsGeneric.h> | |
54 | |
55 #elif ENABLE(THREADING_OPENMP) | |
56 #include <wtf/ParallelJobsOpenMP.h> | |
57 | |
58 #elif ENABLE(THREADING_LIBDISPATCH) | |
59 #include <wtf/ParallelJobsLibdispatch.h> | |
60 | |
61 #else | |
62 #error "No parallel processing API for ParallelJobs" | |
63 | |
64 #endif | |
65 | |
66 namespace WTF { | |
67 | |
68 template<typename Type> | |
69 class ParallelJobs { | |
70 WTF_MAKE_FAST_ALLOCATED; | |
71 public: | |
72 typedef void (*WorkerFunction)(Type*); | |
73 | |
74 ParallelJobs(WorkerFunction func, int requestedJobNumber) : | |
75 m_parallelEnvironment(reinterpret_cast<ParallelEnvironment::ThreadFuncti
on>(func), sizeof(Type), requestedJobNumber) | |
76 { | |
77 m_parameters.grow(m_parallelEnvironment.numberOfJobs()); | |
78 ASSERT(numberOfJobs() == m_parameters.size()); | |
79 } | |
80 | |
81 size_t numberOfJobs() | |
82 { | |
83 return m_parameters.size(); | |
84 } | |
85 | |
86 Type& parameter(size_t i) | |
87 { | |
88 return m_parameters[i]; | |
89 } | |
90 | |
91 void execute() | |
92 { | |
93 m_parallelEnvironment.execute(reinterpret_cast<unsigned char*>(m_paramet
ers.data())); | |
94 } | |
95 | |
96 private: | |
97 ParallelEnvironment m_parallelEnvironment; | |
98 Vector<Type> m_parameters; | |
99 }; | |
100 | |
101 } // namespace WTF | |
102 | |
103 using WTF::ParallelJobs; | |
104 | |
105 #endif // ParallelJobs_h | |
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