63e88f80
 Hu Chunming
提交三方库
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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_SVM_HPP
#define BOOST_COMPUTE_SVM_HPP
#include <boost/compute/config.hpp>
#include <boost/compute/context.hpp>
#include <boost/compute/memory/svm_ptr.hpp>
// svm functions require OpenCL 2.0
#if defined(BOOST_COMPUTE_CL_VERSION_2_0) || defined(BOOST_COMPUTE_DOXYGEN_INVOKED)
namespace boost {
namespace compute {
/// Allocates a shared virtual memory (SVM) buffer.
//
/// \opencl_version_warning{2,0}
///
/// \see_opencl2_ref{clSVMAlloc}
///
/// \see svm_free()
template<class T>
inline svm_ptr<T> svm_alloc(const context &context,
size_t size,
cl_svm_mem_flags flags = CL_MEM_READ_WRITE,
unsigned int alignment = 0)
{
svm_ptr<T> ptr(
clSVMAlloc(context.get(), flags, size * sizeof(T), alignment),
context
);
if(!ptr.get()){
BOOST_THROW_EXCEPTION(opencl_error(CL_MEM_OBJECT_ALLOCATION_FAILURE));
}
return ptr;
}
/// Deallocates a shared virtual memory (SVM) buffer.
///
/// \opencl_version_warning{2,0}
///
/// \see_opencl2_ref{clSVMFree}
///
/// \see svm_alloc(), command_queue::enqueue_svm_free()
template<class T>
inline void svm_free(svm_ptr<T> ptr)
{
clSVMFree(ptr.get_context(), ptr.get());
}
/// \overload
template<class T>
inline void svm_free(const context &context, svm_ptr<T> ptr)
{
clSVMFree(context.get(), ptr.get());
}
} // end compute namespace
} // end boost namespace
#endif // BOOST_COMPUTE_CL_VERSION_2_0
#endif // BOOST_COMPUTE_PIPE_HPP
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