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adapter.h
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adapter.h
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// Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
//
// 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.
// =============================================================================
#ifndef HOROVOD_MXNET_ADAPTER_H
#define HOROVOD_MXNET_ADAPTER_H
#include <mxnet/base.h>
#include "../common/common.h"
namespace horovod {
namespace mxnet {
using namespace horovod::common;
class MXPersistentBuffer : public PersistentBuffer {
public:
MXPersistentBuffer(int device, int64_t size);
virtual const void*
AccessData(std::shared_ptr<OpContext> context) const override;
private:
int device_;
void* buffer_;
};
template <class T> class MXTensor : public Tensor {
public:
MXTensor(T* tensor);
virtual const DataType dtype() const override;
virtual const TensorShape shape() const override;
virtual const void* data() const override;
virtual int64_t size() const override;
virtual T* tensor() const;
protected:
T* tensor_;
};
template <class T> class MXTemporaryBuffer : public MXTensor<T> {
public:
MXTemporaryBuffer(int device, int dtype);
MXTemporaryBuffer(T* tensor);
~MXTemporaryBuffer();
};
template <class T> class MXOpContext : public OpContext {
public:
MXOpContext(int device, T* output);
virtual Status
AllocatePersistent(int64_t size,
std::shared_ptr<PersistentBuffer>* tensor) override;
virtual Status AllocateOutput(TensorShape shape,
std::shared_ptr<Tensor>* tensor) override;
virtual Framework framework() const override;
private:
int device_;
T* output_;
};
inline void ThrowIfError(const Status& status) {
if (!status.ok()) {
throw dmlc::Error(status.reason());
}
}
} // namespace mxnet
} // namespace horovod
#endif // HOROVOD_MXNET_ADAPTER_H