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dmlc--dgl/include/dgl/runtime/smart_ptr_serializer.h
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2026-07-13 13:35:51 +08:00

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/**
* Copyright (c) 2017 by Contributors
* @file dgl/runtime/serializer.h
* @brief Serializer extension to support DGL data types
* Include this file to enable serialization of DGLDataType, DGLContext
*/
#ifndef DGL_RUNTIME_SMART_PTR_SERIALIZER_H_
#define DGL_RUNTIME_SMART_PTR_SERIALIZER_H_
#include <dgl/graph_serializer.h>
#include <dmlc/io.h>
#include <dmlc/serializer.h>
#include <memory>
namespace dmlc {
namespace serializer {
//! \cond Doxygen_Suppress
template <typename T>
struct Handler<std::shared_ptr<T>> {
inline static void Write(Stream *strm, const std::shared_ptr<T> &data) {
Handler<T>::Write(strm, *data.get());
}
inline static bool Read(Stream *strm, std::shared_ptr<T> *data) {
// When read, the default initialization behavior of shared_ptr is
// shared_ptr<T>(), which is holding a nullptr. Here we need to manually
// reset to a real object for further loading
if (!(*data)) {
data->reset(dgl::Serializer::new_object<T>());
}
return Handler<T>::Read(strm, data->get());
}
};
template <typename T>
struct Handler<std::unique_ptr<T>> {
inline static void Write(Stream *strm, const std::unique_ptr<T> &data) {
Handler<T>::Write(strm, *data.get());
}
inline static bool Read(Stream *strm, std::unique_ptr<T> *data) {
// When read, the default initialization behavior of unique_ptr is
// unique_ptr<T>(), which is holding a nullptr. Here we need to manually
// reset to a real object for further loading
if (!(*data)) {
data->reset(dgl::Serializer::new_object<T>());
}
return Handler<T>::Read(strm, data->get());
}
};
} // namespace serializer
} // namespace dmlc
#endif // DGL_RUNTIME_SMART_PTR_SERIALIZER_H_