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#pragma once
#include <functional>
#include <memory>
#include <unordered_map>
namespace c10 {
struct IValue;
}
namespace caffe2::serialize {
class PyTorchStreamWriter;
} // namespace caffe2::serialize
namespace torch::jit {
/*
BackportManager manages a list of backport from n to n-1 function, and provides
function to check if a specific function exists.
*/
class BackportManager final {
public:
bool hasBytecodeBackportFunction(const int64_t from_version) const;
std::unordered_map<
int64_t,
std::function<std::stringstream(std::stringstream&)>>&
bytecodeBackportFunctions() const;
bool backport(
std::istream& oss,
caffe2::serialize::PyTorchStreamWriter& final_writer,
int64_t from_version,
int64_t to_version) const;
BackportManager(BackportManager const&) = delete;
BackportManager& operator=(BackportManager const&) = delete;
BackportManager();
private:
// Registry of backport functions.
void registerBytecodeBackportFunction(
const int64_t from_version,
const std::function<std::stringstream(std::stringstream&)>&
backport_function);
};
} // namespace torch::jit
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