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