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/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_STREAM_MAP_H
#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_STREAM_MAP_H
#include <grpc/support/port_platform.h>
#include <stddef.h>
/* Data structure to map a gpr_uint32 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 {
gpr_uint32 *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, gpr_uint32 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,
gpr_uint32 key);
/* Move all elements of src into dst */
void grpc_chttp2_stream_map_move_into(grpc_chttp2_stream_map *src,
grpc_chttp2_stream_map *dst);
/* Return an existing key, or NULL if it does not exist */
void *grpc_chttp2_stream_map_find(grpc_chttp2_stream_map *map, gpr_uint32 key);
/* 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, gpr_uint32 key,
void *value),
void *user_data);
#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_STREAM_MAP_H */
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