ceph/src/boost/libs/compute/example/copy_data.cpp

   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 //[copy_data_example
  12
  13 #include <vector>
  14
  15 #include <boost/compute/algorithm/copy.hpp>
  16 #include <boost/compute/container/vector.hpp>
  17
  18 namespace compute = boost::compute;
  19
  20 int main()
  21 {
  22     // get default device and setup context
  23     compute::device device = compute::system::default_device();
  24     compute::context context(device);
  25     compute::command_queue queue(context, device);
  26
  27     // create data array on host
  28     int host_data[] = { 1, 3, 5, 7, 9 };
  29
  30     // create vector on device
  31     compute::vector<int> device_vector(5, context);
  32
  33     // copy from host to device
  34     compute::copy(
  35         host_data, host_data + 5, device_vector.begin(), queue
  36     );
  37
  38     // create vector on host
  39     std::vector<int> host_vector(5);
  40
  41     // copy data back to host
  42     compute::copy(
  43         device_vector.begin(), device_vector.end(), host_vector.begin(), queue
  44     );
  45
  46     return 0;
  47 }
  48
  49 //]