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Edit File : set_operations.h \| Size : 14.25 KB
// -- C++ -- // Copyright (C) 2007-2018 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the terms // of the GNU General Public License as published by the Free Software // Foundation; either version 3, or (at your option) any later // version. // This library 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 // General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. /** * @file parallel/set_operations.h * @brief Parallel implementations of set operations for random-access * iterators. * This file is a GNU parallel extension to the Standard C++ Library. / // Written by Marius Elvert and Felix Bondarenko. #ifndef _GLIBCXX_PARALLEL_SET_OPERATIONS_H #define _GLIBCXX_PARALLEL_SET_OPERATIONS_H 1 #include <omp.h> #include <parallel/settings.h> #include <parallel/multiseq_selection.h> namespace __gnu_parallel { template<typename _IIter, typename _OutputIterator> _OutputIterator __copy_tail(std::pair<_IIter, _IIter> __b, std::pair<_IIter, _IIter> __e, _OutputIterator __r) { if (__b.first != __e.first) { do { __r++ = __b.first++; } while (__b.first != __e.first); } else { while (__b.second != __e.second) __r++ = __b.second++; } return __r; } template<typename _IIter, typename _OutputIterator, typename _Compare> struct __symmetric_difference_func { typedef std::iterator_traits<_IIter> _TraitsType; typedef typename _TraitsType::difference_type _DifferenceType; typedef typename std::pair<_IIter, _IIter> _IteratorPair; __symmetric_difference_func(_Compare __comp) : _M_comp(__comp) {} _Compare _M_comp; _OutputIterator _M_invoke(_IIter __a, _IIter __b, _IIter __c, _IIter __d, _OutputIterator __r) const { while (__a != __b && __c != __d) { if (_M_comp(__a, __c)) { __r = __a; ++__a; ++__r; } else if (_M_comp(__c, __a)) { __r = __c; ++__c; ++__r; } else { ++__a; ++__c; } } return std::copy(__c, __d, std::copy(__a, __b, __r)); } _DifferenceType __count(_IIter __a, _IIter __b, _IIter __c, _IIter __d) const { _DifferenceType __counter = 0; while (__a != __b && __c != __d) { if (_M_comp(__a, __c)) { ++__a; ++__counter; } else if (_M_comp(__c, __a)) { ++__c; ++__counter; } else { ++__a; ++__c; } } return __counter + (__b - __a) + (__d - __c); } _OutputIterator __first_empty(_IIter __c, _IIter __d, _OutputIterator __out) const { return std::copy(__c, __d, __out); } _OutputIterator __second_empty(_IIter __a, _IIter __b, _OutputIterator __out) const { return std::copy(__a, __b, __out); } }; template<typename _IIter, typename _OutputIterator, typename _Compare> struct __difference_func { typedef std::iterator_traits<_IIter> _TraitsType; typedef typename _TraitsType::difference_type _DifferenceType; typedef typename std::pair<_IIter, _IIter> _IteratorPair; __difference_func(_Compare __comp) : _M_comp(__comp) {} _Compare _M_comp; _OutputIterator _M_invoke(_IIter __a, _IIter __b, _IIter __c, _IIter __d, _OutputIterator __r) const { while (__a != __b && __c != __d) { if (_M_comp(__a, __c)) { __r = __a; ++__a; ++__r; } else if (_M_comp(__c, __a)) { ++__c; } else { ++__a; ++__c; } } return std::copy(__a, __b, __r); } _DifferenceType __count(_IIter __a, _IIter __b, _IIter __c, _IIter __d) const { _DifferenceType __counter = 0; while (__a != __b && __c != __d) { if (_M_comp(__a, __c)) { ++__a; ++__counter; } else if (_M_comp(__c, __a)) { ++__c; } else { ++__a; ++__c; } } return __counter + (__b - __a); } _OutputIterator __first_empty(_IIter, _IIter, _OutputIterator __out) const { return __out; } _OutputIterator __second_empty(_IIter __a, _IIter __b, _OutputIterator __out) const { return std::copy(__a, __b, __out); } }; template<typename _IIter, typename _OutputIterator, typename _Compare> struct __intersection_func { typedef std::iterator_traits<_IIter> _TraitsType; typedef typename _TraitsType::difference_type _DifferenceType; typedef typename std::pair<_IIter, _IIter> _IteratorPair; __intersection_func(_Compare __comp) : _M_comp(__comp) {} _Compare _M_comp; _OutputIterator _M_invoke(_IIter __a, _IIter __b, _IIter __c, _IIter __d, _OutputIterator __r) const { while (__a != __b && __c != __d) { if (_M_comp(__a, __c)) { ++__a; } else if (_M_comp(__c, __a)) { ++__c; } else { __r = __a; ++__a; ++__c; ++__r; } } return __r; } _DifferenceType __count(_IIter __a, _IIter __b, _IIter __c, _IIter __d) const { _DifferenceType __counter = 0; while (__a != __b && __c != __d) { if (_M_comp(__a, __c)) { ++__a; } else if (_M_comp(__c, __a)) { ++__c; } else { ++__a; ++__c; ++__counter; } } return __counter; } _OutputIterator __first_empty(_IIter, _IIter, _OutputIterator __out) const { return __out; } _OutputIterator __second_empty(_IIter, _IIter, _OutputIterator __out) const { return __out; } }; template<class _IIter, class _OutputIterator, class _Compare> struct __union_func { typedef typename std::iterator_traits<_IIter>::difference_type _DifferenceType; __union_func(_Compare __comp) : _M_comp(__comp) {} _Compare _M_comp; _OutputIterator _M_invoke(_IIter __a, const _IIter __b, _IIter __c, const _IIter __d, _OutputIterator __r) const { while (__a != __b && __c != __d) { if (_M_comp(__a, __c)) { __r = __a; ++__a; } else if (_M_comp(__c, __a)) { __r = __c; ++__c; } else { __r = __a; ++__a; ++__c; } ++__r; } return std::copy(__c, __d, std::copy(__a, __b, __r)); } _DifferenceType __count(_IIter __a, _IIter __b, _IIter __c, _IIter __d) const { _DifferenceType __counter = 0; while (__a != __b && __c != __d) { if (_M_comp(__a, __c)) { ++__a; } else if (_M_comp(__c, __a)) { ++__c; } else { ++__a; ++__c; } ++__counter; } __counter += (__b - __a); __counter += (__d - __c); return __counter; } _OutputIterator __first_empty(_IIter __c, _IIter __d, _OutputIterator __out) const { return std::copy(__c, __d, __out); } _OutputIterator __second_empty(_IIter __a, _IIter __b, _OutputIterator __out) const { return std::copy(__a, __b, __out); } }; template<typename _IIter, typename _OutputIterator, typename _Operation> _OutputIterator __parallel_set_operation(_IIter __begin1, _IIter __end1, _IIter __begin2, _IIter __end2, _OutputIterator __result, _Operation __op) { _GLIBCXX_CALL((__end1 - __begin1) + (__end2 - __begin2)) typedef std::iterator_traits<_IIter> _TraitsType; typedef typename _TraitsType::difference_type _DifferenceType; typedef typename std::pair<_IIter, _IIter> _IteratorPair; if (__begin1 == __end1) return __op.__first_empty(__begin2, __end2, __result); if (__begin2 == __end2) return __op.__second_empty(__begin1, __end1, __result); const _DifferenceType __size = (__end1 - __begin1) + (__end2 - __begin2); const _IteratorPair __sequence[2] = { std::make_pair(__begin1, __end1), std::make_pair(__begin2, __end2) }; _OutputIterator __return_value = __result; _DifferenceType __borders; _IteratorPair __block_begins; _DifferenceType __lengths; _ThreadIndex __num_threads = std::min<_DifferenceType>(__get_max_threads(), std::min(__end1 - __begin1, __end2 - __begin2)); # pragma omp parallel num_threads(__num_threads) { # pragma omp single { __num_threads = omp_get_num_threads(); __borders = new _DifferenceType[__num_threads + 2]; __equally_split(__size, __num_threads + 1, __borders); __block_begins = new _IteratorPair[__num_threads + 1]; // Very __start. __block_begins[0] = std::make_pair(__begin1, __begin2); __lengths = new _DifferenceType[__num_threads]; } //single _ThreadIndex __iam = omp_get_thread_num(); // _Result from multiseq_partition. _IIter __offset[2]; const _DifferenceType __rank = __borders[__iam + 1]; multiseq_partition(__sequence, __sequence + 2, __rank, __offset, __op._M_comp); // allowed to read? // together // (__offset[ 0 ] - 1) == __offset[ 1 ] if (__offset[ 0 ] != __begin1 && __offset[1] != __end2 && !__op._M_comp((__offset[0] - 1), __offset[1]) && !__op._M_comp(__offset[1], (__offset[0] - 1))) { // Avoid split between globally equal elements: move one to // front in first sequence. --__offset[0]; } _IteratorPair __block_end = __block_begins[__iam + 1] = _IteratorPair(__offset[0], __offset[1]); // Make sure all threads have their block_begin result written out. # pragma omp barrier _IteratorPair __block_begin = __block_begins[__iam]; // Begin working for the first block, while the others except // the last start to count. if (__iam == 0) { // The first thread can copy already. __lengths[ __iam ] = __op._M_invoke(__block_begin.first, __block_end.first, __block_begin.second, __block_end.second, __result) - __result; } else { __lengths[ __iam ] = __op.__count(__block_begin.first, __block_end.first, __block_begin.second, __block_end.second); } // Make sure everyone wrote their lengths. # pragma omp barrier _OutputIterator __r = __result; if (__iam == 0) { // Do the last block. for (_ThreadIndex __i = 0; __i < __num_threads; ++__i) __r += __lengths[__i]; __block_begin = __block_begins[__num_threads]; // Return the result iterator of the last block. __return_value = __op._M_invoke(__block_begin.first, __end1, __block_begin.second, __end2, __r); } else { for (_ThreadIndex __i = 0; __i < __iam; ++__i) __r += __lengths[ __i ]; // Reset begins for copy pass. __op._M_invoke(__block_begin.first, __block_end.first, __block_begin.second, __block_end.second, __r); } } return __return_value; } template<typename _IIter, typename _OutputIterator, typename _Compare> inline _OutputIterator __parallel_set_union(_IIter __begin1, _IIter __end1, _IIter __begin2, _IIter __end2, _OutputIterator __result, _Compare __comp) { return __parallel_set_operation(__begin1, __end1, __begin2, __end2, __result, __union_func< _IIter, _OutputIterator, _Compare>(__comp)); } template<typename _IIter, typename _OutputIterator, typename _Compare> inline _OutputIterator __parallel_set_intersection(_IIter __begin1, _IIter __end1, _IIter __begin2, _IIter __end2, _OutputIterator __result, _Compare __comp) { return __parallel_set_operation(__begin1, __end1, __begin2, __end2, __result, __intersection_func<_IIter, _OutputIterator, _Compare>(__comp)); } template<typename _IIter, typename _OutputIterator, typename _Compare> inline _OutputIterator __parallel_set_difference(_IIter __begin1, _IIter __end1, _IIter __begin2, _IIter __end2, _OutputIterator __result, _Compare __comp) { return __parallel_set_operation(__begin1, __end1, __begin2, __end2, __result, __difference_func<_IIter, _OutputIterator, _Compare>(__comp)); } template<typename _IIter, typename _OutputIterator, typename _Compare> inline _OutputIterator __parallel_set_symmetric_difference(_IIter __begin1, _IIter __end1, _IIter __begin2, _IIter __end2, _OutputIterator __result, _Compare __comp) { return __parallel_set_operation(__begin1, __end1, __begin2, __end2, __result, __symmetric_difference_func<_IIter, _OutputIterator, _Compare>(__comp)); } } #endif /* _GLIBCXX_PARALLEL_SET_OPERATIONS_H */ Back

Edit File : set_operations.h | Size : 14.25 KB

// -*- C++ -*-

// Copyright (C) 2007-2018 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the terms
// of the GNU General Public License as published by the Free Software
// Foundation; either version 3, or (at your option) any later
// version.

// This library 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
// General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/**
 * @file parallel/set_operations.h
 * @brief Parallel implementations of set operations for random-access
 * iterators.
 *  This file is a GNU parallel extension to the Standard C++ Library.
 */

// Written by Marius Elvert and Felix Bondarenko.

#ifndef _GLIBCXX_PARALLEL_SET_OPERATIONS_H
#define _GLIBCXX_PARALLEL_SET_OPERATIONS_H 1

#include <omp.h>

#include <parallel/settings.h>
#include <parallel/multiseq_selection.h>

namespace __gnu_parallel
{
  template<typename _IIter, typename _OutputIterator>
    _OutputIterator
    __copy_tail(std::pair<_IIter, _IIter> __b,
		std::pair<_IIter, _IIter> __e, _OutputIterator __r)
    {
      if (__b.first != __e.first)
	{
          do
            {
              *__r++ = *__b.first++;
            }
          while (__b.first != __e.first);
	}
      else
	{
          while (__b.second != __e.second)
            *__r++ = *__b.second++;
	}
      return __r;
    }

template<typename _IIter,
           typename _OutputIterator,
           typename _Compare>
    struct __symmetric_difference_func
    {
      typedef std::iterator_traits<_IIter> _TraitsType;
      typedef typename _TraitsType::difference_type _DifferenceType;
      typedef typename std::pair<_IIter, _IIter> _IteratorPair;

__symmetric_difference_func(_Compare __comp) : _M_comp(__comp) {}

_Compare _M_comp;

_OutputIterator
      _M_invoke(_IIter __a, _IIter __b, _IIter __c, _IIter __d,
		_OutputIterator __r) const
      {
	while (__a != __b && __c != __d)
          {
            if (_M_comp(*__a, *__c))
              {
        	*__r = *__a;
        	++__a;
        	++__r;
              }
            else if (_M_comp(*__c, *__a))
              {
        	*__r = *__c;
        	++__c;
        	++__r;
              }
            else
              {
        	++__a;
        	++__c;
              }
          }
	return std::copy(__c, __d, std::copy(__a, __b, __r));
      }

_DifferenceType
      __count(_IIter __a, _IIter __b, _IIter __c, _IIter __d) const
      {
	_DifferenceType __counter = 0;

while (__a != __b && __c != __d)
          {
            if (_M_comp(*__a, *__c))
              {
        	++__a;
        	++__counter;
              }
            else if (_M_comp(*__c, *__a))
              {
        	++__c;
        	++__counter;
              }
            else
              {
        	++__a;
        	++__c;
              }
          }

return __counter + (__b - __a) + (__d - __c);
      }

_OutputIterator
      __first_empty(_IIter __c, _IIter __d, _OutputIterator __out) const
      { return std::copy(__c, __d, __out); }

_OutputIterator
      __second_empty(_IIter __a, _IIter __b, _OutputIterator __out) const
      { return std::copy(__a, __b, __out); }
    };

template<typename _IIter,
           typename _OutputIterator,
           typename _Compare>
    struct __difference_func
    {
      typedef std::iterator_traits<_IIter> _TraitsType;
      typedef typename _TraitsType::difference_type _DifferenceType;
      typedef typename std::pair<_IIter, _IIter> _IteratorPair;

__difference_func(_Compare __comp) : _M_comp(__comp) {}

_Compare _M_comp;

_OutputIterator
      _M_invoke(_IIter __a, _IIter __b, _IIter __c, _IIter __d,
		_OutputIterator __r) const
      {
	while (__a != __b && __c != __d)
          {
            if (_M_comp(*__a, *__c))
              {
        	*__r = *__a;
        	++__a;
        	++__r;
              }
            else if (_M_comp(*__c, *__a))
              { ++__c; }
            else
              {
        	++__a;
        	++__c;
              }
          }
	return std::copy(__a, __b, __r);
      }

_DifferenceType
      __count(_IIter __a, _IIter __b,
	      _IIter __c, _IIter __d) const
      {
	_DifferenceType __counter = 0;

while (__a != __b && __c != __d)
          {
            if (_M_comp(*__a, *__c))
              {
        	++__a;
        	++__counter;
              }
            else if (_M_comp(*__c, *__a))
              { ++__c; }
            else
              { ++__a; ++__c; }
          }

return __counter + (__b - __a);
      }

_OutputIterator
      __first_empty(_IIter, _IIter, _OutputIterator __out) const
      { return __out; }

_OutputIterator
      __second_empty(_IIter __a, _IIter __b, _OutputIterator __out) const
      { return std::copy(__a, __b, __out); }
    };

template<typename _IIter,
           typename _OutputIterator,
           typename _Compare>
    struct __intersection_func
    {
      typedef std::iterator_traits<_IIter> _TraitsType;
      typedef typename _TraitsType::difference_type _DifferenceType;
      typedef typename std::pair<_IIter, _IIter> _IteratorPair;

__intersection_func(_Compare __comp) : _M_comp(__comp) {}

_Compare _M_comp;

_OutputIterator
      _M_invoke(_IIter __a, _IIter __b, _IIter __c, _IIter __d,
		_OutputIterator __r) const
      {
	while (__a != __b && __c != __d)
          {
            if (_M_comp(*__a, *__c))
              { ++__a; }
            else if (_M_comp(*__c, *__a))
              { ++__c; }
            else
              {
        	*__r = *__a;
        	++__a;
        	++__c;
        	++__r;
              }
          }

return __r;
      }

_DifferenceType
      __count(_IIter __a, _IIter __b, _IIter __c, _IIter __d) const
      {
	_DifferenceType __counter = 0;

while (__a != __b && __c != __d)
          {
            if (_M_comp(*__a, *__c))
              { ++__a; }
            else if (_M_comp(*__c, *__a))
              { ++__c; }
            else
              {
        	++__a;
        	++__c;
        	++__counter;
              }
          }

return __counter;
      }

_OutputIterator
      __first_empty(_IIter, _IIter, _OutputIterator __out) const
      { return __out; }

_OutputIterator
      __second_empty(_IIter, _IIter, _OutputIterator __out) const
      { return __out; }
    };

template<class _IIter, class _OutputIterator, class _Compare>
    struct __union_func
    {
      typedef typename std::iterator_traits<_IIter>::difference_type
      _DifferenceType;

__union_func(_Compare __comp) : _M_comp(__comp) {}

_Compare _M_comp;

_OutputIterator
      _M_invoke(_IIter __a, const _IIter __b, _IIter __c,
		const _IIter __d, _OutputIterator __r) const
      {
	while (__a != __b && __c != __d)
          {
            if (_M_comp(*__a, *__c))
              {
        	*__r = *__a;
        	++__a;
              }
            else if (_M_comp(*__c, *__a))
              {
        	*__r = *__c;
        	++__c;
              }
            else
              {
        	*__r = *__a;
        	++__a;
        	++__c;
              }
            ++__r;
          }
	return std::copy(__c, __d, std::copy(__a, __b, __r));
      }

_DifferenceType
      __count(_IIter __a, _IIter __b, _IIter __c, _IIter __d) const
      {
	_DifferenceType __counter = 0;

while (__a != __b && __c != __d)
          {
            if (_M_comp(*__a, *__c))
              { ++__a; }
            else if (_M_comp(*__c, *__a))
              { ++__c; }
            else
              {
        	++__a;
        	++__c;
              }
            ++__counter;
          }

__counter += (__b - __a);
	__counter += (__d - __c);
	return __counter;
      }

_OutputIterator
      __first_empty(_IIter __c, _IIter __d, _OutputIterator __out) const
      { return std::copy(__c, __d, __out); }

_OutputIterator
      __second_empty(_IIter __a, _IIter __b, _OutputIterator __out) const
      { return std::copy(__a, __b, __out); }
    };

template<typename _IIter,
           typename _OutputIterator,
           typename _Operation>
    _OutputIterator
    __parallel_set_operation(_IIter __begin1, _IIter __end1,
			     _IIter __begin2, _IIter __end2,
			     _OutputIterator __result, _Operation __op)
    {
      _GLIBCXX_CALL((__end1 - __begin1) + (__end2 - __begin2))

typedef std::iterator_traits<_IIter> _TraitsType;
      typedef typename _TraitsType::difference_type _DifferenceType;
      typedef typename std::pair<_IIter, _IIter> _IteratorPair;

if (__begin1 == __end1)
	return __op.__first_empty(__begin2, __end2, __result);

if (__begin2 == __end2)
	return __op.__second_empty(__begin1, __end1, __result);

const _DifferenceType __size = (__end1 - __begin1) + (__end2 - __begin2);

const _IteratorPair __sequence[2] = { std::make_pair(__begin1, __end1),
					    std::make_pair(__begin2, __end2) };
      _OutputIterator __return_value = __result;
      _DifferenceType *__borders;
      _IteratorPair *__block_begins;
      _DifferenceType* __lengths;

_ThreadIndex __num_threads =
          std::min<_DifferenceType>(__get_max_threads(),
              std::min(__end1 - __begin1, __end2 - __begin2));

#     pragma omp parallel num_threads(__num_threads)
      {
#       pragma omp single
	{
	  __num_threads = omp_get_num_threads();

__borders = new _DifferenceType[__num_threads + 2];
	  __equally_split(__size, __num_threads + 1, __borders);
	  __block_begins = new _IteratorPair[__num_threads + 1];
	  // Very __start.
	  __block_begins[0] = std::make_pair(__begin1, __begin2);
	  __lengths = new _DifferenceType[__num_threads];
	} //single

_ThreadIndex __iam = omp_get_thread_num();

// _Result from multiseq_partition.
	_IIter __offset[2];
	const _DifferenceType __rank = __borders[__iam + 1];

multiseq_partition(__sequence, __sequence + 2,
			   __rank, __offset, __op._M_comp);

// allowed to read?
	// together
	// *(__offset[ 0 ] - 1) == *__offset[ 1 ]
	if (__offset[ 0 ] != __begin1 && __offset[1] != __end2
	    && !__op._M_comp(*(__offset[0] - 1), *__offset[1])
	    && !__op._M_comp(*__offset[1], *(__offset[0] - 1)))
	  {
	    // Avoid split between globally equal elements: move one to
	    // front in first sequence.
              --__offset[0];
	  }

_IteratorPair __block_end = __block_begins[__iam + 1] =
	  _IteratorPair(__offset[0], __offset[1]);

// Make sure all threads have their block_begin result written out.
#       pragma omp barrier

_IteratorPair __block_begin = __block_begins[__iam];

// Begin working for the first block, while the others except
	// the last start to count.
	if (__iam == 0)
	  {
	    // The first thread can copy already.
	    __lengths[ __iam ] =
	      __op._M_invoke(__block_begin.first, __block_end.first,
			     __block_begin.second, __block_end.second,
			     __result) - __result;
	  }
	else
	  {
	    __lengths[ __iam ] =
	      __op.__count(__block_begin.first, __block_end.first,
			   __block_begin.second, __block_end.second);
	  }

// Make sure everyone wrote their lengths.
#       pragma omp barrier

_OutputIterator __r = __result;

if (__iam == 0)
	  {
	    // Do the last block.
	    for (_ThreadIndex __i = 0; __i < __num_threads; ++__i)
	      __r += __lengths[__i];

__block_begin = __block_begins[__num_threads];

// Return the result iterator of the last block.
	    __return_value =
	      __op._M_invoke(__block_begin.first, __end1,
			     __block_begin.second, __end2, __r);

}
          else
            {
              for (_ThreadIndex __i = 0; __i < __iam; ++__i)
        	__r += __lengths[ __i ];

// Reset begins for copy pass.
              __op._M_invoke(__block_begin.first, __block_end.first,
			     __block_begin.second, __block_end.second, __r);
            }
	}
      return __return_value;
    }

template<typename _IIter,
           typename _OutputIterator,
           typename _Compare>
    inline _OutputIterator
    __parallel_set_union(_IIter __begin1, _IIter __end1,
			 _IIter __begin2, _IIter __end2,
			 _OutputIterator __result, _Compare __comp)
    {
      return __parallel_set_operation(__begin1, __end1, __begin2, __end2,
				      __result,
				      __union_func< _IIter, _OutputIterator,
				      _Compare>(__comp));
    }

template<typename _IIter,
           typename _OutputIterator,
           typename _Compare>
    inline _OutputIterator
    __parallel_set_intersection(_IIter __begin1, _IIter __end1,
                        	_IIter __begin2, _IIter __end2,
                        	_OutputIterator __result, _Compare __comp)
    {
      return __parallel_set_operation(__begin1, __end1, __begin2, __end2,
				      __result,
				      __intersection_func<_IIter,
				      _OutputIterator, _Compare>(__comp));
    }

template<typename _IIter,
           typename _OutputIterator,
           typename _Compare>
    inline _OutputIterator
    __parallel_set_difference(_IIter __begin1, _IIter __end1,
                              _IIter __begin2, _IIter __end2,
                              _OutputIterator __result, _Compare __comp)
    {
      return __parallel_set_operation(__begin1, __end1, __begin2, __end2,
				      __result,
				      __difference_func<_IIter,
				      _OutputIterator, _Compare>(__comp));
    }

template<typename _IIter,
           typename _OutputIterator,
           typename _Compare>
    inline _OutputIterator
    __parallel_set_symmetric_difference(_IIter __begin1, _IIter __end1,
                                	_IIter __begin2, _IIter __end2,
                                	_OutputIterator __result,
                                	_Compare __comp)
    {
      return __parallel_set_operation(__begin1, __end1, __begin2, __end2,
				      __result,
				      __symmetric_difference_func<_IIter,
				      _OutputIterator, _Compare>(__comp));
    }
}

#endif /* _GLIBCXX_PARALLEL_SET_OPERATIONS_H */

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