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