| /* |
| * |
| * 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> |
| |
| /* 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); |
| |
| #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_STREAM_MAP_H */ |