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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 ParallelJobsOpenMP_h | |
| 29 #define ParallelJobsOpenMP_h | |
| 30 | |
| 31 #if ENABLE(THREADING_OPENMP) | |
| 32 | |
| 33 #include <omp.h> | |
| 34 | |
| 35 namespace WTF { | |
| 36 | |
| 37 class ParallelEnvironment { | |
| 38 WTF_MAKE_NONCOPYABLE(ParallelEnvironment); | |
| 39 public: | |
| 40 typedef void (*ThreadFunction)(void*); | |
| 41 | |
| 42 ParallelEnvironment(ThreadFunction threadFunction, size_t sizeOfParameter, i
nt requestedJobNumber) : | |
| 43 m_threadFunction(threadFunction), | |
| 44 m_sizeOfParameter(sizeOfParameter) | |
| 45 { | |
| 46 int maxNumberOfThreads = omp_get_max_threads(); | |
| 47 | |
| 48 if (!requestedJobNumber || requestedJobNumber > maxNumberOfThreads) | |
| 49 requestedJobNumber = maxNumberOfThreads; | |
| 50 | |
| 51 ASSERT(requestedJobNumber > 0); | |
| 52 | |
| 53 m_numberOfJobs = requestedJobNumber; | |
| 54 | |
| 55 } | |
| 56 | |
| 57 int numberOfJobs() | |
| 58 { | |
| 59 return m_numberOfJobs; | |
| 60 } | |
| 61 | |
| 62 void execute(unsigned char* parameters) | |
| 63 { | |
| 64 omp_set_num_threads(m_numberOfJobs); | |
| 65 | |
| 66 #pragma omp parallel for | |
| 67 for (int i = 0; i < m_numberOfJobs; ++i) | |
| 68 (*m_threadFunction)(parameters + i * m_sizeOfParameter); | |
| 69 } | |
| 70 | |
| 71 private: | |
| 72 ThreadFunction m_threadFunction; | |
| 73 size_t m_sizeOfParameter; | |
| 74 int m_numberOfJobs; | |
| 75 }; | |
| 76 | |
| 77 } // namespace WTF | |
| 78 | |
| 79 #endif // ENABLE(THREADING_OPENMP) | |
| 80 | |
| 81 #endif // ParallelJobsOpenMP_h | |
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Chromium Code Reviews
Issue 14390002:
Decrease the visibility of the ENABLE_THREADING_XX guards. (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master