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 [, requestedNumberOfJobs]); 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 66namespace WTF { 67 68template<typename Type> 69class ParallelJobs { 70 WTF_MAKE_FAST_ALLOCATED; 71public: 72 typedef void (*WorkerFunction)(Type*); 73 74 ParallelJobs(WorkerFunction func, int requestedJobNumber) : 75 m_parallelEnvironment(reinterpret_cast<ParallelEnvironment::ThreadFunction>(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_parameters.data())); 94 } 95 96private: 97 ParallelEnvironment m_parallelEnvironment; 98 Vector<Type> m_parameters; 99}; 100 101} // namespace WTF 102 103using WTF::ParallelJobs; 104 105#endif // ParallelJobs_h 106