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/*
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#pragma once
#include <faiss/IVFlib.h>
#include <faiss/impl/IDSelector.h>
#include <faiss/impl/io.h>
#include <faiss/invlists/InvertedLists.h>
#include "Python.h"
// all callbacks have to acquire the GIL on input
/***********************************************************
* Callbacks for IO reader and writer
***********************************************************/
struct PyCallbackIOWriter : faiss::IOWriter {
PyObject* callback;
size_t bs; // maximum write size
/** Callback: Python function that takes a bytes object and
* returns the number of bytes successfully written.
*/
explicit PyCallbackIOWriter(PyObject* callback, size_t bs = 1024 * 1024);
size_t operator()(const void* ptrv, size_t size, size_t nitems) override;
~PyCallbackIOWriter() override;
};
struct PyCallbackIOReader : faiss::IOReader {
PyObject* callback;
size_t bs; // maximum buffer size
/** Callback: Python function that takes a size and returns a
* bytes object with the resulting read */
explicit PyCallbackIOReader(PyObject* callback, size_t bs = 1024 * 1024);
size_t operator()(void* ptrv, size_t size, size_t nitems) override;
~PyCallbackIOReader() override;
};
/***********************************************************
* Callbacks for IDSelector
***********************************************************/
struct PyCallbackIDSelector : faiss::IDSelector {
PyObject* callback;
explicit PyCallbackIDSelector(PyObject* callback);
bool is_member(faiss::idx_t id) const override;
~PyCallbackIDSelector() override;
};
/***********************************************************
* Callbacks for IVF index sharding
***********************************************************/
struct PyCallbackShardingFunction : faiss::ivflib::ShardingFunction {
PyObject* callback;
explicit PyCallbackShardingFunction(PyObject* callback);
int64_t operator()(int64_t i, int64_t shard_count) override;
~PyCallbackShardingFunction() override;
PyCallbackShardingFunction(const PyCallbackShardingFunction&) = delete;
PyCallbackShardingFunction(PyCallbackShardingFunction&&) noexcept = default;
PyCallbackShardingFunction& operator=(const PyCallbackShardingFunction&) =
default;
PyCallbackShardingFunction& operator=(PyCallbackShardingFunction&&) =
default;
};
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