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The C and C++ Include Header Files

/usr/include/c++/11/parallel/for_each.h

$ cat -n /usr/include/c++/11/parallel/for_each.h

     1	// -*- C++ -*-
     2	
     3	// Copyright (C) 2007-2021 Free Software Foundation, Inc.
     4	//
     5	// This file is part of the GNU ISO C++ Library.  This library is free
     6	// software; you can redistribute it and/or modify it under the terms
     7	// of the GNU General Public License as published by the Free Software
     8	// Foundation; either version 3, or (at your option) any later
     9	// version.
    10	
    11	// This library is distributed in the hope that it will be useful, but
    12	// WITHOUT ANY WARRANTY; without even the implied warranty of
    13	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    14	// General Public License for more details.
    15	
    16	// Under Section 7 of GPL version 3, you are granted additional
    17	// permissions described in the GCC Runtime Library Exception, version
    18	// 3.1, as published by the Free Software Foundation.
    19	
    20	// You should have received a copy of the GNU General Public License and
    21	// a copy of the GCC Runtime Library Exception along with this program;
    22	// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
    23	// <http://www.gnu.org/licenses/>.
    24	
    25	/** @file parallel/for_each.h
    26	 *  @brief Main interface for embarrassingly parallel functions.
    27	 *
    28	 *  The explicit implementation are in other header files, like
    29	 *  workstealing.h, par_loop.h, omp_loop.h, and omp_loop_static.h.
    30	 *  This file is a GNU parallel extension to the Standard C++ Library.
    31	 */
    32	
    33	// Written by Felix Putze.
    34	
    35	#ifndef _GLIBCXX_PARALLEL_FOR_EACH_H
    36	#define _GLIBCXX_PARALLEL_FOR_EACH_H 1
    37	
    38	#include <parallel/settings.h>
    39	#include <parallel/par_loop.h>
    40	#include <parallel/omp_loop.h>
    41	#include <parallel/workstealing.h>
    42	
    43	namespace __gnu_parallel
    44	{
    45	  /** @brief Chose the desired algorithm by evaluating @c __parallelism_tag.
    46	   *  @param __begin Begin iterator of input sequence.
    47	   *  @param __end End iterator of input sequence.
    48	   *  @param __user_op A user-specified functor (comparator, predicate,
    49	   *  associative operator,...)
    50	   *  @param __functionality functor to @a process an element with
    51	   *  __user_op (depends on desired functionality, e. g. accumulate,
    52	   *  for_each,...
    53	   *  @param __reduction Reduction functor.
    54	   *  @param __reduction_start Initial value for reduction.
    55	   *  @param __output Output iterator.
    56	   *  @param __bound Maximum number of elements processed.
    57	   *  @param __parallelism_tag Parallelization method */
    58	  template<typename _IIter, typename _UserOp,
    59	           typename _Functionality, typename _Red, typename _Result>
    60	    _UserOp
    61	    __for_each_template_random_access(_IIter __begin, _IIter __end,
    62	                                      _UserOp __user_op,
    63	                                      _Functionality& __functionality,
    64	                                      _Red __reduction,
    65	                                      _Result __reduction_start,
    66	                                      _Result& __output, typename
    67	                                      std::iterator_traits<_IIter>::
    68	                                      difference_type __bound,
    69	                                      _Parallelism __parallelism_tag)
    70	    {
    71	      if (__parallelism_tag == parallel_unbalanced)
    72	        return __for_each_template_random_access_ed
    73		  (__begin, __end, __user_op, __functionality, __reduction,
    74		   __reduction_start, __output, __bound);
    75	      else if (__parallelism_tag == parallel_omp_loop)
    76	        return __for_each_template_random_access_omp_loop
    77		  (__begin, __end, __user_op, __functionality, __reduction,
    78		   __reduction_start, __output, __bound);
    79	      else if (__parallelism_tag == parallel_omp_loop_static)
    80	        return __for_each_template_random_access_omp_loop
    81		  (__begin, __end, __user_op, __functionality, __reduction,
    82		   __reduction_start, __output, __bound);
    83	      else      //e. g. parallel_balanced
    84	        return __for_each_template_random_access_workstealing
    85		  (__begin, __end, __user_op, __functionality, __reduction,
    86		   __reduction_start, __output, __bound);
    87	  }
    88	}
    89	
    90	#endif /* _GLIBCXX_PARALLEL_FOR_EACH_H */
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