101 lines
3.0 KiB
C++
101 lines
3.0 KiB
C++
/*
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* Copyright (C) 2011 University of Szeged
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* Copyright (C) 2011 Gabor Loki <loki@webkit.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY UNIVERSITY OF SZEGED ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL UNIVERSITY OF SZEGED OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <wtf/Assertions.h>
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#include <wtf/Vector.h>
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// Usage:
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//
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// // Initialize parallel jobs
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// ParallelJobs<TypeOfParameter> parallelJobs(&worker [, requestedNumberOfJobs]);
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//
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// // Fill the parameter array
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// for(i = 0; i < parallelJobs.numberOfJobs(); ++i) {
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// TypeOfParameter& params = parallelJobs.parameter(i);
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// params.attr1 = localVars ...
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// ...
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// }
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//
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// // Execute parallel jobs
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// parallelJobs.execute();
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//
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#if ENABLE(THREADING_GENERIC)
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#include <wtf/ParallelJobsGeneric.h>
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#elif ENABLE(THREADING_OPENMP)
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#include <wtf/ParallelJobsOpenMP.h>
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#elif ENABLE(THREADING_LIBDISPATCH)
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#include <wtf/ParallelJobsLibdispatch.h>
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#else
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#error "No parallel processing API for ParallelJobs"
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#endif
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namespace WTF {
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template<typename Type>
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class ParallelJobs {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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typedef void (*WorkerFunction)(Type*);
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ParallelJobs(WorkerFunction func, int requestedJobNumber) :
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m_parallelEnvironment(reinterpret_cast<ParallelEnvironment::ThreadFunction>(func), sizeof(Type), requestedJobNumber)
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{
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m_parameters.grow(m_parallelEnvironment.numberOfJobs());
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ASSERT(numberOfJobs() == m_parameters.size());
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}
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size_t numberOfJobs()
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{
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return m_parameters.size();
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}
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Type& parameter(size_t i)
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{
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return m_parameters[i];
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}
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void execute()
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{
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m_parallelEnvironment.execute(reinterpret_cast<unsigned char*>(m_parameters.data()));
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}
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private:
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ParallelEnvironment m_parallelEnvironment;
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Vector<Type> m_parameters;
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};
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} // namespace WTF
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using WTF::ParallelJobs;
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