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79 lines
2.3 KiB
C++
79 lines
2.3 KiB
C++
//
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//---------------------------------------------------------------------------
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//
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// Copyright(C) 2017 Alexey Lysiuk
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// All rights reserved.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with this program. If not, see http://www.gnu.org/licenses/
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//
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//--------------------------------------------------------------------------
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//
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#pragma once
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#ifndef PARALLEL_FOR_H_INCLUDED
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#define PARALLEL_FOR_H_INCLUDED
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#ifdef HAVE_PARALLEL_FOR
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#include <ppl.h>
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template <typename Index, typename Function>
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inline void parallel_for(const Index first, const Index last, const Index step, const Function& function)
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{
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concurrency::parallel_for(first, last, step, function);
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}
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#elif defined HAVE_DISPATCH_APPLY
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#include <dispatch/dispatch.h>
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template <typename Index, typename Function>
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inline void parallel_for(const Index first, const Index last, const Index step, const Function& function)
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{
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const dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
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dispatch_apply((last - first) / step + 1, queue, ^(size_t slice)
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{
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function(slice * step);
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});
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}
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#else // Generic loop with optional OpenMP parallelization
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template <typename Index, typename Function>
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inline void parallel_for(const Index first, const Index last, const Index step, const Function& function)
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{
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#pragma omp parallel for
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for (Index i = first; i < last; i += step)
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{
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function(i);
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}
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}
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#endif // HAVE_PARALLEL_FOR
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template <typename Index, typename Function>
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inline void parallel_for(const Index count, const Function& function)
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{
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parallel_for(0, count, 1, function);
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}
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template <typename Index, typename Function>
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inline void parallel_for(const Index count, const Index step, const Function& function)
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{
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parallel_for(0, count, step, function);
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}
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#endif // PARALLEL_FOR_H_INCLUDED
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