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/*
* Copyright (c) 2016 Nicira, Inc.
*
* 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.
*/
#ifndef OBJECT_COLLECTION_H
#define OBJECT_COLLECTION_H 1
#include <limits.h>
#include <stdlib.h>
/* A set of object pointers. */
struct object_collection {
void **objs; /* Objects. */
size_t n; /* Number of objects collected. */
size_t capacity; /* Number of objects that fit in 'objs'. */
void *stub[5]; /* Preallocated array to avoid malloc(). */
};
void object_collection_init(struct object_collection *);
void object_collection_add(struct object_collection *, void *);
void object_collection_remove(struct object_collection *, void *);
void object_collection_move(struct object_collection *to,
struct object_collection *from);
void *object_collection_detach(struct object_collection *);
void object_collection_destroy(struct object_collection *);
/* Macro for declaring type-safe pointer collections. 'TYPE' is the pointer
* type which are collected, 'NAME' is the name for the type to be used in the
* function names. */
#define DECL_OBJECT_COLLECTION(TYPE, NAME) \
struct NAME##_collection { \
struct object_collection collection; \
}; \
\
static inline void NAME##_collection_init(struct NAME##_collection *coll) \
{ \
object_collection_init(&coll->collection); \
} \
\
static inline void NAME##_collection_add(struct NAME##_collection *coll, \
TYPE obj) \
{ \
object_collection_add(&coll->collection, obj); \
} \
\
static inline void NAME##_collection_remove(struct NAME##_collection *coll, \
TYPE obj) \
{ \
object_collection_remove(&coll->collection, obj); \
} \
\
static inline void NAME##_collection_move(struct NAME##_collection *to, \
struct NAME##_collection *from) \
{ \
object_collection_move(&to->collection, &from->collection); \
} \
\
static inline void NAME##_collection_destroy(struct NAME##_collection *coll) \
{ \
object_collection_destroy(&coll->collection); \
} \
\
static inline TYPE* NAME##_collection_##NAME##s(const struct NAME##_collection *coll) \
{ \
return (TYPE*)coll->collection.objs; \
} \
\
static inline size_t NAME##_collection_n(const struct NAME##_collection *coll) \
{ \
return coll->collection.n; \
} \
\
static inline TYPE* NAME##_collection_detach(struct NAME##_collection *coll) \
{ \
return (TYPE*)object_collection_detach(&coll->collection); \
}
#endif /* object-collection.h */
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