Program Listing for File CudaConstantMemoryResource.hpp

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//////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2018-2019, Lawrence Livermore National Security, LLC.
// Produced at the Lawrence Livermore National Laboratory
//
// Created by David Beckingsale, david@llnl.gov
// LLNL-CODE-747640
//
// All rights reserved.
//
// This file is part of Umpire.
//
// For details, see https://github.com/LLNL/Umpire
// Please also see the LICENSE file for MIT license.
//////////////////////////////////////////////////////////////////////////////
#ifndef UMPIRE_CudaConstantMemoryResource_HPP
#define UMPIRE_CudaConstantMemoryResource_HPP

#include "umpire/resource/MemoryResource.hpp"

#include "umpire/util/AllocationRecord.hpp"
#include "umpire/util/Platform.hpp"

#include <cuda_runtime_api.h>

__constant__ char umpire_internal_device_constant_memory[64*1024];

namespace umpire {
namespace resource {


class CudaConstantMemoryResource :
  public MemoryResource
{
  public:
    CudaConstantMemoryResource(const std::string& name, int id, MemoryResourceTraits traits);

    void* allocate(size_t bytes);
    void deallocate(void* ptr);

    long getCurrentSize() const noexcept;
    long getHighWatermark() const noexcept;

    Platform getPlatform() noexcept;

  private:
    long m_current_size;
    long m_highwatermark;

    Platform m_platform;

    size_t m_offset;
    void* m_ptr;
};

} // end of namespace resource
} // end of namespace umpire

#endif // UMPIRE_CudaConstantMemoryResource_HPP