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//---------------------------------------------------------------------------//
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// Copyright (c) 2013-2014 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_GET_OBJECT_INFO_HPP
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#define BOOST_COMPUTE_DETAIL_GET_OBJECT_INFO_HPP
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#include <string>
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#include <vector>
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#include <boost/preprocessor/seq/for_each.hpp>
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#include <boost/preprocessor/tuple/elem.hpp>
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#include <boost/throw_exception.hpp>
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#include <boost/compute/cl.hpp>
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#include <boost/compute/exception/opencl_error.hpp>
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namespace boost {
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namespace compute {
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namespace detail {
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template<class Function, class Object, class AuxInfo>
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struct bound_info_function
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{
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bound_info_function(Function function, Object object, AuxInfo aux_info)
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: m_function(function),
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m_object(object),
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m_aux_info(aux_info)
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{
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}
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template<class Info>
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cl_int operator()(Info info, size_t size, void *value, size_t *size_ret) const
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{
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return m_function(m_object, m_aux_info, info, size, value, size_ret);
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}
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Function m_function;
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Object m_object;
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AuxInfo m_aux_info;
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};
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template<class Function, class Object>
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struct bound_info_function<Function, Object, void>
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{
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bound_info_function(Function function, Object object)
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: m_function(function),
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m_object(object)
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{
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}
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template<class Info>
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cl_int operator()(Info info, size_t size, void *value, size_t *size_ret) const
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{
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return m_function(m_object, info, size, value, size_ret);
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}
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Function m_function;
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Object m_object;
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};
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template<class Function, class Object>
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inline bound_info_function<Function, Object, void>
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bind_info_function(Function f, Object o)
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{
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return bound_info_function<Function, Object, void>(f, o);
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}
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template<class Function, class Object, class AuxInfo>
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inline bound_info_function<Function, Object, AuxInfo>
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bind_info_function(Function f, Object o, AuxInfo j)
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{
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return bound_info_function<Function, Object, AuxInfo>(f, o, j);
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}
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// default implementation
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template<class T>
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struct get_object_info_impl
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{
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template<class Function, class Info>
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T operator()(Function function, Info info) const
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{
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T value;
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cl_int ret = function(info, sizeof(T), &value, 0);
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if(ret != CL_SUCCESS){
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BOOST_THROW_EXCEPTION(opencl_error(ret));
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}
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return value;
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}
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};
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// specialization for bool
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template<>
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struct get_object_info_impl<bool>
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{
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template<class Function, class Info>
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bool operator()(Function function, Info info) const
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{
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cl_bool value;
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cl_int ret = function(info, sizeof(cl_bool), &value, 0);
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if(ret != CL_SUCCESS){
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BOOST_THROW_EXCEPTION(opencl_error(ret));
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}
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return value == CL_TRUE;
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}
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};
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// specialization for std::string
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template<>
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struct get_object_info_impl<std::string>
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{
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template<class Function, class Info>
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std::string operator()(Function function, Info info) const
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{
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size_t size = 0;
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cl_int ret = function(info, 0, 0, &size);
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if(ret != CL_SUCCESS){
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BOOST_THROW_EXCEPTION(opencl_error(ret));
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}
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if(size == 0){
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return std::string();
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}
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std::string value(size - 1, 0);
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ret = function(info, size, &value[0], 0);
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if(ret != CL_SUCCESS){
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BOOST_THROW_EXCEPTION(opencl_error(ret));
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}
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return value;
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}
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};
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// specialization for std::vector<T>
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template<class T>
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struct get_object_info_impl<std::vector<T> >
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{
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template<class Function, class Info>
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std::vector<T> operator()(Function function, Info info) const
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{
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size_t size = 0;
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cl_int ret = function(info, 0, 0, &size);
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if(ret != CL_SUCCESS){
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BOOST_THROW_EXCEPTION(opencl_error(ret));
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}
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std::vector<T> vector(size / sizeof(T));
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ret = function(info, size, &vector[0], 0);
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if(ret != CL_SUCCESS){
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BOOST_THROW_EXCEPTION(opencl_error(ret));
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}
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return vector;
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}
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};
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// returns the value (of type T) from the given clGet*Info() function call.
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template<class T, class Function, class Object, class Info>
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inline T get_object_info(Function f, Object o, Info i)
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{
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return get_object_info_impl<T>()(bind_info_function(f, o), i);
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}
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template<class T, class Function, class Object, class Info, class AuxInfo>
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inline T get_object_info(Function f, Object o, Info i, AuxInfo j)
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{
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return get_object_info_impl<T>()(bind_info_function(f, o, j), i);
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}
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// returns the value type for the clGet*Info() call on Object with Enum.
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template<class Object, int Enum>
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struct get_object_info_type;
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// defines the object::get_info<Enum>() specialization
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#define BOOST_COMPUTE_DETAIL_DEFINE_GET_INFO_SPECIALIZATION(object_type, result_type, value) \
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namespace detail { \
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template<> struct get_object_info_type<object_type, value> { typedef result_type type; }; \
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} \
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template<> inline result_type object_type::get_info<value>() const \
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{ \
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return get_info<result_type>(value); \
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}
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// used by BOOST_COMPUTE_DETAIL_DEFINE_GET_INFO_SPECIALIZATIONS()
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#define BOOST_COMPUTE_DETAIL_DEFINE_GET_INFO_IMPL(r, data, elem) \
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BOOST_COMPUTE_DETAIL_DEFINE_GET_INFO_SPECIALIZATION( \
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data, BOOST_PP_TUPLE_ELEM(2, 0, elem), BOOST_PP_TUPLE_ELEM(2, 1, elem) \
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)
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// defines the object::get_info<Enum>() specialization for each
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// (result_type, value) tuple in seq for object_type.
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#define BOOST_COMPUTE_DETAIL_DEFINE_GET_INFO_SPECIALIZATIONS(object_type, seq) \
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BOOST_PP_SEQ_FOR_EACH( \
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BOOST_COMPUTE_DETAIL_DEFINE_GET_INFO_IMPL, object_type, seq \
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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_GET_OBJECT_INFO_HPP
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