3 * Copyright 2015 gRPC authors.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
19 #ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_STREAM_MAP_H
20 #define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_STREAM_MAP_H
22 #include <grpc/support/port_platform.h>
26 /* Data structure to map a uint32_t to a data object (represented by a void*)
28 Represented as a sorted array of keys, and a corresponding array of values.
29 Lookups are performed with binary search.
30 Adds are restricted to strictly higher keys than previously seen (this is
31 guaranteed by http2). */
38 } grpc_chttp2_stream_map;
40 void grpc_chttp2_stream_map_init(grpc_chttp2_stream_map* map,
41 size_t initial_capacity);
42 void grpc_chttp2_stream_map_destroy(grpc_chttp2_stream_map* map);
44 /* Add a new key: given http2 semantics, new keys must always be greater than
45 existing keys - this is asserted */
46 void grpc_chttp2_stream_map_add(grpc_chttp2_stream_map* map, uint32_t key,
49 /* Delete an existing key - returns the previous value of the key if it existed,
51 void* grpc_chttp2_stream_map_delete(grpc_chttp2_stream_map* map, uint32_t key);
53 /* Return an existing key, or NULL if it does not exist */
54 void* grpc_chttp2_stream_map_find(grpc_chttp2_stream_map* map, uint32_t key);
56 /* Return a random entry */
57 void* grpc_chttp2_stream_map_rand(grpc_chttp2_stream_map* map);
59 /* How many (populated) entries are in the stream map? */
60 size_t grpc_chttp2_stream_map_size(grpc_chttp2_stream_map* map);
62 /* Callback on each stream */
63 void grpc_chttp2_stream_map_for_each(grpc_chttp2_stream_map* map,
64 void (*f)(void* user_data, uint32_t key,
68 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_STREAM_MAP_H */