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/*
* Copyright (c) 2021 Cisco and/or its affiliates.
* 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.
*/
/**
* \file state.h
* \brief Face cache
*
* The face cache is an index array of faces that mirror the current state of
* the forwarder in order to filter out redundant events, and perform set
* reconciliation.
*/
#ifndef FACEMGR_CACHE_H
#define FACEMGR_CACHE_H
#include <stdlib.h>
#include "face.h"
/**
* \brief Face cache
*/
typedef struct {
face_t** faces; /**< array of _pointers_ to faces */
size_t max_size_log; /**< log2 of allocated size */
size_t size; /**< effective array size */
} face_cache_t;
face_cache_t* face_cache_create();
void face_cache_free(face_cache_t* face_cache);
/* a la VPP vector, we never create a face outside of the vector */
/* problem is that face ptr can get invalid if we manipulate the vector */
face_t* face_cache_get(face_cache_t* cache_cache);
face_t* face_cache_add(face_cache_t* face_cache, face_t* face);
face_t* face_cache_remove(face_cache_t* face_cache, face_t* face);
face_t* face_cache_get_by_id(face_cache_t* face_cache, int id);
void face_cache_dump(face_cache_t* face_cache);
#endif /* FACEMGR_CACHE_H */
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