Program Listing for File SyclMallocManagedAllocator.hpp¶
↰ Return to documentation for file (umpire/alloc/SyclMallocManagedAllocator.hpp
)
//////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2016-20, Lawrence Livermore National Security, LLC and Umpire
// project contributors. See the COPYRIGHT file for details.
//
// SPDX-License-Identifier: (MIT)
//////////////////////////////////////////////////////////////////////////////
#ifndef UMPIRE_SyclMallocManagedAllocator_HPP
#define UMPIRE_SyclMallocManagedAllocator_HPP
#include <CL/sycl.hpp>
#include "umpire/util/Macros.hpp"
namespace umpire {
namespace alloc {
/*!
* \brief Uses sycl_shared and sycl_free to allocate and deallocate
* unified shared memory (USM) on Intel GPUs.
*/
struct SyclMallocManagedAllocator {
/*!
* \brief Allocate bytes of memory using cl::sycl::malloc_shared.
*
* \param bytes Number of bytes to allocate.
*
* \return Pointer to start of the allocation.
*
* \throws umpire::util::Exception if memory cannot be allocated.
*/
void* allocate(std::size_t bytes, const cl::sycl::queue& queue_t)
{
void* usm_ptr = cl::sycl::malloc_shared(bytes, queue_t);
UMPIRE_LOG(Debug, "(bytes=" << bytes << ") returning " << usm_ptr);
if (usm_ptr == nullptr) {
UMPIRE_ERROR("cl::sycl::malloc_shared( bytes = "
<< bytes << " ) failed with error!");
} else {
return usm_ptr;
}
}
/*!
* \brief Deallocate memory using cl::sycl::free.
*
* \param usm_ptr Address to deallocate.
*
* \throws umpire::util::Exception if memory be free'd.
*/
void deallocate(void* usm_ptr, const cl::sycl::queue& queue_t)
{
UMPIRE_LOG(Debug, "(usm_ptr=" << usm_ptr << ")");
cl::sycl::free(usm_ptr, queue_t);
}
};
} // end of namespace alloc
} // end of namespace umpire
#endif // UMPIRE_SyclMallocManagedAllocator_HPP