add boost on mac

macx64/include/boost/compute/detail/read_write_single_value.hpp

@@ -0,0 +1,78 @@
+//---------------------------------------------------------------------------//
+// 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_DETAIL_READ_WRITE_SINGLE_VALUE_HPP
+#define BOOST_COMPUTE_DETAIL_READ_WRITE_SINGLE_VALUE_HPP
+
+#include <boost/throw_exception.hpp>
+
+#include <boost/compute/buffer.hpp>
+#include <boost/compute/event.hpp>
+#include <boost/compute/exception.hpp>
+#include <boost/compute/command_queue.hpp>
+
+namespace boost {
+namespace compute {
+namespace detail {
+
+// reads and returns a single value at index in the buffer
+template<class T>
+inline T read_single_value(const buffer &buffer,
+                           size_t index,
+                           command_queue &queue)
+{
+    BOOST_ASSERT(index < buffer.size() / sizeof(T));
+    BOOST_ASSERT(buffer.get_context() == queue.get_context());
+
+    T value;
+    queue.enqueue_read_buffer(buffer,
+                              sizeof(T) * index,
+                              sizeof(T),
+                              &value);
+    return value;
+}
+
+// reads and returns a the first value in the buffer
+template<class T>
+inline T read_single_value(const buffer &buffer, command_queue &queue)
+{
+    return read_single_value<T>(buffer, 0, queue);
+}
+
+// writes a single value at index to the buffer
+template<class T>
+inline event write_single_value(const T &value,
+                                const buffer &buffer,
+                                size_t index,
+                                command_queue &queue)
+{
+    BOOST_ASSERT(index < buffer.size() / sizeof(T));
+    BOOST_ASSERT(buffer.get_context() == queue.get_context());
+
+    return queue.enqueue_write_buffer(buffer,
+                                      index * sizeof(T),
+                                      sizeof(T),
+                                      &value);
+}
+
+// writes value to the first location in buffer
+template<class T>
+inline void write_single_value(const T &value,
+                               const buffer &buffer,
+                               command_queue &queue)
+{
+    write_single_value<T>(value, buffer, 0, queue);
+}
+
+} // end detail namespace
+} // end compute namespace
+} // end boost namespace
+
+#endif // BOOST_COMPUTE_DETAIL_READ_WRITE_SINGLE_VALUE_HPP