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/*
*
* Copyright 2015 gRPC authors.
*
* 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 GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_STREAM_MAP_H
#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_STREAM_MAP_H
#include <grpc/support/port_platform.h>
#include <stddef.h>
#ifdef __cplusplus
extern "C" {
#endif
/* Data structure to map a uint32_t to a data object (represented by a void*)
Represented as a sorted array of keys, and a corresponding array of values.
Lookups are performed with binary search.
Adds are restricted to strictly higher keys than previously seen (this is
guaranteed by http2). */
typedef struct {
uint32_t *keys;
void **values;
size_t count;
size_t free;
size_t capacity;
} grpc_chttp2_stream_map;
void grpc_chttp2_stream_map_init(grpc_chttp2_stream_map *map,
size_t initial_capacity);
void grpc_chttp2_stream_map_destroy(grpc_chttp2_stream_map *map);
/* Add a new key: given http2 semantics, new keys must always be greater than
existing keys - this is asserted */
void grpc_chttp2_stream_map_add(grpc_chttp2_stream_map *map, uint32_t key,
void *value);
/* Delete an existing key - returns the previous value of the key if it existed,
or NULL otherwise */
void *grpc_chttp2_stream_map_delete(grpc_chttp2_stream_map *map, uint32_t key);
/* Return an existing key, or NULL if it does not exist */
void *grpc_chttp2_stream_map_find(grpc_chttp2_stream_map *map, uint32_t key);
/* Return a random entry */
void *grpc_chttp2_stream_map_rand(grpc_chttp2_stream_map *map);
/* How many (populated) entries are in the stream map? */
size_t grpc_chttp2_stream_map_size(grpc_chttp2_stream_map *map);
/* Callback on each stream */
void grpc_chttp2_stream_map_for_each(grpc_chttp2_stream_map *map,
void (*f)(void *user_data, uint32_t key,
void *value),
void *user_data);
#ifdef __cplusplus
}
#endif
#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_STREAM_MAP_H */
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