1/*
2 * Copyright (C) 2011 University of Szeged
3 * Copyright (C) 2011 Gabor Loki <[email protected]>
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#pragma once
29
30#include <wtf/Assertions.h>
31#include <wtf/Vector.h>
32
33// Usage:
34//
35// // Initialize parallel jobs
36// ParallelJobs<TypeOfParameter> parallelJobs(&worker [, requestedNumberOfJobs]);
37//
38// // Fill the parameter array
39// for(i = 0; i < parallelJobs.numberOfJobs(); ++i) {
40// TypeOfParameter& params = parallelJobs.parameter(i);
41// params.attr1 = localVars ...
42// ...
43// }
44//
45// // Execute parallel jobs
46// parallelJobs.execute();
47//
48
49#if ENABLE(THREADING_GENERIC)
50#include <wtf/ParallelJobsGeneric.h>
51
52#elif ENABLE(THREADING_OPENMP)
53#include <wtf/ParallelJobsOpenMP.h>
54
55#elif ENABLE(THREADING_LIBDISPATCH)
56#include <wtf/ParallelJobsLibdispatch.h>
57
58#else
59#error "No parallel processing API for ParallelJobs"
60
61#endif
62
63namespace WTF {
64
65template<typename Type>
66class ParallelJobs {
67 WTF_MAKE_FAST_ALLOCATED;
68public:
69 typedef void (*WorkerFunction)(Type*);
70
71 ParallelJobs(WorkerFunction func, int requestedJobNumber) :
72 m_parallelEnvironment(reinterpret_cast<ParallelEnvironment::ThreadFunction>(func), sizeof(Type), requestedJobNumber)
73 {
74 m_parameters.grow(m_parallelEnvironment.numberOfJobs());
75 ASSERT(numberOfJobs() == m_parameters.size());
76 }
77
78 size_t numberOfJobs()
79 {
80 return m_parameters.size();
81 }
82
83 Type& parameter(size_t i)
84 {
85 return m_parameters[i];
86 }
87
88 void execute()
89 {
90 m_parallelEnvironment.execute(reinterpret_cast<unsigned char*>(m_parameters.data()));
91 }
92
93private:
94 ParallelEnvironment m_parallelEnvironment;
95 Vector<Type> m_parameters;
96};
97
98} // namespace WTF
99
100using WTF::ParallelJobs;
101