ceph/src/boost/boost/compute/algorithm/partition_point.hpp

   1 //---------------------------------------------------------------------------//
   2 // Copyright (c) 2014 Roshan <thisisroshansmail@gmail.com>
   3 //
   4 // Distributed under the Boost Software License, Version 1.0
   5 // See accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt
   7 //
   8 // See http://boostorg.github.com/compute for more information.
   9 //---------------------------------------------------------------------------//
  10
  11 #ifndef BOOST_COMPUTE_ALGORITHM_PARTITION_POINT_HPP
  12 #define BOOST_COMPUTE_ALGORITHM_PARTITION_POINT_HPP
  13
  14 #include <boost/static_assert.hpp>
  15
  16 #include <boost/compute/system.hpp>
  17 #include <boost/compute/command_queue.hpp>
  18 #include <boost/compute/algorithm/detail/binary_find.hpp>
  19 #include <boost/compute/type_traits/is_device_iterator.hpp>
  20
  21 namespace boost {
  22 namespace compute {
  23
  24 ///
  25 /// \brief Partition point algorithm
  26 ///
  27 /// Finds the end of true values in the partitioned range [first, last)
  28 /// \return Iterator pointing to end of true values
  29 ///
  30 /// \param first Iterator pointing to start of range
  31 /// \param last Iterator pointing to end of range
  32 /// \param predicate Unary predicate to be applied on each element
  33 /// \param queue Queue on which to execute
  34 ///
  35 /// Space complexity: \Omega(1)
  36 ///
  37 /// \see partition() and stable_partition()
  38 ///
  39 template<class InputIterator, class UnaryPredicate>
  40 inline InputIterator partition_point(InputIterator first,
  41                                      InputIterator last,
  42                                      UnaryPredicate predicate,
  43                                      command_queue &queue = system::default_queue())
  44 {
  45     BOOST_STATIC_ASSERT(is_device_iterator<InputIterator>::value);
  46     return detail::binary_find(first, last, not1(predicate), queue);
  47 }
  48
  49 } // end compute namespace
  50 } // end boost namespace
  51
  52 #endif // BOOST_COMPUTE_ALGORITHM_PARTITION_POINT_HPP