78 lines
2.5 KiB
Plaintext
78 lines
2.5 KiB
Plaintext
//---------------------------------------------------------------------------//
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// Copyright (c) 2013 Kyle Lutz <kyle.r.lutz@gmail.com>
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//
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// Distributed under the Boost Software License, Version 1.0
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt
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//
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// See http://boostorg.github.com/compute for more information.
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//---------------------------------------------------------------------------//
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#ifndef BOOST_COMPUTE_DETAIL_READ_WRITE_SINGLE_VALUE_HPP
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#define BOOST_COMPUTE_DETAIL_READ_WRITE_SINGLE_VALUE_HPP
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#include <boost/throw_exception.hpp>
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#include <boost/compute/buffer.hpp>
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#include <boost/compute/exception.hpp>
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#include <boost/compute/command_queue.hpp>
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namespace boost {
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namespace compute {
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namespace detail {
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// reads and returns a single value at index in the buffer
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template<class T>
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inline T read_single_value(const buffer &buffer,
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size_t index,
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command_queue &queue)
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{
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BOOST_ASSERT(index < buffer.size() / sizeof(T));
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BOOST_ASSERT(buffer.get_context() == queue.get_context());
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T value;
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queue.enqueue_read_buffer(buffer,
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sizeof(T) * index,
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sizeof(T),
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&value);
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return value;
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}
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// reads and returns a the first value in the buffer
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template<class T>
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inline T read_single_value(const buffer &buffer, command_queue &queue)
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{
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return read_single_value<T>(buffer, 0, queue);
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}
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// writes a single value at index to the buffer
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template<class T>
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inline void write_single_value(const T &value,
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const buffer &buffer,
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size_t index,
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command_queue &queue)
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{
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BOOST_ASSERT(index < buffer.size() / sizeof(T));
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BOOST_ASSERT(buffer.get_context() == queue.get_context());
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queue.enqueue_write_buffer(buffer,
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index * sizeof(T),
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sizeof(T),
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&value);
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}
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// writes value to the first location in buffer
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template<class T>
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inline void write_single_value(const T &value,
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const buffer &buffer,
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command_queue &queue)
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{
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write_single_value<T>(value, buffer, 0, queue);
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}
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} // end detail namespace
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} // end compute namespace
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} // end boost namespace
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#endif // BOOST_COMPUTE_DETAIL_READ_WRITE_SINGLE_VALUE_HPP
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