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    Copyright 2005-2018 Intel Corporation.  All Rights Reserved.

    The source code contained or described herein and all documents related
    to the source code ("Material") are owned by Intel Corporation or its
    suppliers or licensors.  Title to the Material remains with Intel
    Corporation or its suppliers and licensors.  The Material is protected
    by worldwide copyright laws and treaty provisions.  No part of the
    Material may be used, copied, reproduced, modified, published, uploaded,
    posted, transmitted, distributed, or disclosed in any way without
    Intel's prior express written permission.

    No license under any patent, copyright, trade secret or other
    intellectual property right is granted to or conferred upon you by
    disclosure or delivery of the Materials, either expressly, by
    implication, inducement, estoppel or otherwise.  Any license under such
    intellectual property rights must be express and approved by Intel in
    writing.
*/

#ifndef __TBB_parallel_for_each_H
#define __TBB_parallel_for_each_H

#include "parallel_do.h"
#include "parallel_for.h"

namespace tbb {

//! @cond INTERNAL
namespace internal {
    // The class calls user function in operator()
    template <typename Function, typename Iterator>
    class parallel_for_each_body_do : internal::no_assign {
        const Function &my_func;
    public:
        parallel_for_each_body_do(const Function &_func) : my_func(_func) {}

        void operator()(typename std::iterator_traits<Iterator>::reference value) const {
            my_func(value);
        }
    };

    // The class calls user function in operator()
    template <typename Function, typename Iterator>
    class parallel_for_each_body_for : internal::no_assign {
        const Function &my_func;
    public:
        parallel_for_each_body_for(const Function &_func) : my_func(_func) {}

        void operator()(tbb::blocked_range<Iterator> range) const {
#if __INTEL_COMPILER
#pragma ivdep
#endif
            for(Iterator it = range.begin(), end = range.end(); it != end; ++it) {
                my_func(*it);
            }
        }
    };

    template<typename Iterator, typename Function, typename Generic>
    struct parallel_for_each_impl {
#if __TBB_TASK_GROUP_CONTEXT
        static void doit(Iterator first, Iterator last, const Function& f, task_group_context &context) {
            internal::parallel_for_each_body_do<Function, Iterator> body(f);
            tbb::parallel_do(first, last, body, context);
        }
#endif
        static void doit(Iterator first, Iterator last, const Function& f) {
            internal::parallel_for_each_body_do<Function, Iterator> body(f);
            tbb::parallel_do(first, last, body);
        }
    };
    template<typename Iterator, typename Function>
    struct parallel_for_each_impl<Iterator, Function, std::random_access_iterator_tag> {
#if __TBB_TASK_GROUP_CONTEXT
        static void doit(Iterator first, Iterator last, const Function& f, task_group_context &context) {
            internal::parallel_for_each_body_for<Function, Iterator> body(f);
            tbb::parallel_for(tbb::blocked_range<Iterator>(first, last), body, context);
        }
#endif
        static void doit(Iterator first, Iterator last, const Function& f) {
            internal::parallel_for_each_body_for<Function, Iterator> body(f);
            tbb::parallel_for(tbb::blocked_range<Iterator>(first, last), body);
        }
    };
} // namespace internal
//! @endcond

/** \name parallel_for_each
    **/
//@{
//! Calls function f for all items from [first, last) interval using user-supplied context
/** @ingroup algorithms */
#if __TBB_TASK_GROUP_CONTEXT
template<typename Iterator, typename Function>
void parallel_for_each(Iterator first, Iterator last, const Function& f, task_group_context &context) {
    internal::parallel_for_each_impl<Iterator, Function, typename std::iterator_traits<Iterator>::iterator_category>::doit(first, last, f, context);
}

//! Calls function f for all items from rng using user-supplied context
/** @ingroup algorithms */
template<typename Range, typename Function>
void parallel_for_each(Range& rng, const Function& f, task_group_context& context) {
    parallel_for_each(tbb::internal::first(rng), tbb::internal::last(rng), f, context);
}

//! Calls function f for all items from const rng user-supplied context
/** @ingroup algorithms */
template<typename Range, typename Function>
void parallel_for_each(const Range& rng, const Function& f, task_group_context& context) {
    parallel_for_each(tbb::internal::first(rng), tbb::internal::last(rng), f, context);
}
#endif /* __TBB_TASK_GROUP_CONTEXT */

//! Uses default context
template<typename Iterator, typename Function>
void parallel_for_each(Iterator first, Iterator last, const Function& f) {
    internal::parallel_for_each_impl<Iterator, Function, typename std::iterator_traits<Iterator>::iterator_category>::doit(first, last, f);
}

//! Uses default context
template<typename Range, typename Function>
void parallel_for_each(Range& rng, const Function& f) {
    parallel_for_each(tbb::internal::first(rng), tbb::internal::last(rng), f);
}

//! Uses default context
template<typename Range, typename Function>
void parallel_for_each(const Range& rng, const Function& f) {
    parallel_for_each(tbb::internal::first(rng), tbb::internal::last(rng), f);
}

//@}

} // namespace

#endif /* __TBB_parallel_for_each_H */
