DeviceAllocator.h

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/*
 * Copyright 2019 OmniSci, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include "Shared/Logger.h"

#ifdef HAVE_CUDA
#include <cuda.h>
#else
#include <Shared/nocuda.h>
#endif

namespace Data_Namespace {
class AbstractBuffer;
class DataMgr;
}  // namespace Data_Namespace

class Allocator {
 public:
  Allocator() {}
  virtual ~Allocator() {}

  virtual int8_t* alloc(const size_t num_bytes) = 0;
};

class DeviceAllocator : public Allocator {
 public:
  virtual void free(Data_Namespace::AbstractBuffer* ab) const = 0;

  virtual void copyToDevice(int8_t* device_dst,
                            const int8_t* host_src,
                            const size_t num_bytes) const = 0;

  virtual void copyFromDevice(int8_t* host_dst,
                              const int8_t* device_src,
                              const size_t num_bytes) const = 0;

  virtual void zeroDeviceMem(int8_t* device_ptr, const size_t num_bytes) const = 0;

  virtual void setDeviceMem(int8_t* device_ptr,
                            unsigned char uc,
                            const size_t num_bytes) const = 0;
};