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#pragma once
#include <string>
#include <functional>
#include "c10/util/Registry.h"
#include "caffe2/core/common.h"
#include "caffe2/proto/caffe2_pb.h"
namespace caffe2 {
class Blob;
constexpr int kDefaultChunkSize = -1;
constexpr int kNoChunking = 0;
/**
* @brief BlobSerializerBase is an abstract class that serializes a blob to a
* string.
*
* This class exists purely for the purpose of registering type-specific
* serialization code. If you need to serialize a specific type, you should
* write your own Serializer class, and then register it using
* REGISTER_BLOB_SERIALIZER. For a detailed example, see TensorSerializer for
* details.
*/
class BlobSerializerBase {
public:
virtual ~BlobSerializerBase() {}
using SerializationAcceptor =
std::function<void(const std::string& blobName, const std::string& data)>;
/**
* @brief The virtual function that returns a serialized string for the input
* blob.
* @param blob
* the input blob to be serialized.
* @param name
* the blob name to be used in the serialization implementation. It is up
* to the implementation whether this name field is going to be used or
* not.
* @param acceptor
* a lambda which accepts key value pairs to save them to storage.
* serailizer can use it to save blob in several chunks
* acceptor should be thread-safe
*/
virtual void Serialize(
const void* pointer,
TypeMeta typeMeta,
const std::string& name,
SerializationAcceptor acceptor) = 0;
virtual void SerializeWithChunkSize(
const void* pointer,
TypeMeta typeMeta,
const std::string& name,
SerializationAcceptor acceptor,
int /*chunk_size*/) {
// Base implementation.
Serialize(pointer, typeMeta, name, acceptor);
}
};
// The Blob serialization registry and serializer creator functions.
C10_DECLARE_TYPED_REGISTRY(
BlobSerializerRegistry,
TypeIdentifier,
BlobSerializerBase,
std::unique_ptr);
#define REGISTER_BLOB_SERIALIZER(id, ...) \
C10_REGISTER_TYPED_CLASS(BlobSerializerRegistry, id, __VA_ARGS__)
// Creates an operator with the given operator definition.
inline unique_ptr<BlobSerializerBase> CreateSerializer(TypeIdentifier id) {
return BlobSerializerRegistry()->Create(id);
}
/**
* @brief BlobDeserializerBase is an abstract class that deserializes a blob
* from a BlobProto or a TensorProto.
*/
class CAFFE2_API BlobDeserializerBase {
public:
virtual ~BlobDeserializerBase() {}
// Deserializes from a BlobProto object.
virtual void Deserialize(const BlobProto& proto, Blob* blob) = 0;
};
C10_DECLARE_REGISTRY(BlobDeserializerRegistry, BlobDeserializerBase);
#define REGISTER_BLOB_DESERIALIZER(name, ...) \
C10_REGISTER_CLASS(BlobDeserializerRegistry, name, __VA_ARGS__)
// Creates an operator with the given operator definition.
inline unique_ptr<BlobDeserializerBase> CreateDeserializer(const string& type) {
return BlobDeserializerRegistry()->Create(type);
}
} // namespace caffe2
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