ceph/src/boost/libs/compute/include/boost/compute/iterator/detail/get_base_iterator_buffer.hpp

   1 //---------------------------------------------------------------------------//
   2 // Copyright (c) 2013 Kyle Lutz <kyle.r.lutz@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_ITERATOR_DETAIL_GET_BASE_ITERATOR_BUFFER_HPP
  12 #define BOOST_COMPUTE_ITERATOR_DETAIL_GET_BASE_ITERATOR_BUFFER_HPP
  13
  14 namespace boost {
  15 namespace compute {
  16 namespace detail {
  17
  18 // returns the buffer for an iterator adaptor's base iterator if
  19 // it exists, otherwise returns a null buffer object.
  20 template<class Iterator>
  21 inline const buffer&
  22 get_base_iterator_buffer(const Iterator &iter,
  23                          typename boost::enable_if<
  24                              is_buffer_iterator<
  25                                  typename Iterator::base_type
  26                              >
  27                          >::type* = 0)
  28 {
  29     return iter.base().get_buffer();
  30 }
  31
  32 template<class Iterator>
  33 inline const buffer&
  34 get_base_iterator_buffer(const Iterator &iter,
  35                          typename boost::disable_if<
  36                              is_buffer_iterator<
  37                                  typename Iterator::base_type
  38                              >
  39                          >::type* = 0)
  40 {
  41     (void) iter;
  42
  43     static buffer null_buffer;
  44
  45     return null_buffer;
  46 }
  47
  48 } // end detail namespace
  49 } // end compute namespace
  50 } // end boost namespace
  51
  52 #endif // BOOST_COMPUTE_ITERATOR_DETAIL_GET_BASE_ITERATOR_BUFFER_HPP