add boost on mac

macx64/include/boost/compute/algorithm/random_shuffle.hpp

@@ -0,0 +1,90 @@
+//---------------------------------------------------------------------------//
+// Copyright (c) 2013 Kyle Lutz <kyle.r.lutz@gmail.com>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+// See http://boostorg.github.com/compute for more information.
+//---------------------------------------------------------------------------//
+
+#ifndef BOOST_COMPUTE_ALGORITHM_RANDOM_SHUFFLE_HPP
+#define BOOST_COMPUTE_ALGORITHM_RANDOM_SHUFFLE_HPP
+
+#include <vector>
+#include <algorithm>
+
+#ifdef BOOST_COMPUTE_USE_CPP11
+#include <random>
+#endif
+
+#include <boost/static_assert.hpp>
+#include <boost/range/algorithm_ext/iota.hpp>
+
+#include <boost/compute/system.hpp>
+#include <boost/compute/functional.hpp>
+#include <boost/compute/command_queue.hpp>
+#include <boost/compute/container/vector.hpp>
+#include <boost/compute/algorithm/scatter.hpp>
+#include <boost/compute/detail/iterator_range_size.hpp>
+#include <boost/compute/type_traits/is_device_iterator.hpp>
+
+namespace boost {
+namespace compute {
+
+/// Randomly shuffles the elements in the range [\p first, \p last).
+///
+/// Space complexity: \Omega(2n)
+///
+/// \see scatter()
+template<class Iterator>
+inline void random_shuffle(Iterator first,
+                           Iterator last,
+                           command_queue &queue = system::default_queue())
+{
+    BOOST_STATIC_ASSERT(is_device_iterator<Iterator>::value);
+    typedef typename std::iterator_traits<Iterator>::value_type value_type;
+
+    size_t count = detail::iterator_range_size(first, last);
+    if(count == 0){
+        return;
+    }
+
+    // generate shuffled indices on the host
+    std::vector<cl_uint> random_indices(count);
+    boost::iota(random_indices, 0);
+#ifdef BOOST_COMPUTE_USE_CPP11
+    std::random_device nondeterministic_randomness;
+    std::default_random_engine random_engine(nondeterministic_randomness());
+    std::shuffle(random_indices.begin(), random_indices.end(), random_engine);
+#else
+    std::random_shuffle(random_indices.begin(), random_indices.end());
+#endif
+
+    // copy random indices to the device
+    const context &context = queue.get_context();
+    vector<cl_uint> indices(count, context);
+    ::boost::compute::copy(random_indices.begin(),
+                           random_indices.end(),
+                           indices.begin(),
+                           queue);
+
+    // make a copy of the values on the device
+    vector<value_type> tmp(count, context);
+    ::boost::compute::copy(first,
+                           last,
+                           tmp.begin(),
+                           queue);
+
+    // write values to their new locations
+    ::boost::compute::scatter(tmp.begin(),
+                              tmp.end(),
+                              indices.begin(),
+                              first,
+                              queue);
+}
+
+} // end compute namespace
+} // end boost namespace
+
+#endif // BOOST_COMPUTE_ALGORITHM_RANDOM_SHUFFLE_HPP