Built motion from commit 6a09e18b.|2.6.11

[motion2.git] / legacy-libs / grpc / deps / grpc / src / core / ext / transport / chttp2 / transport / stream_map.h

diff --git a/legacy-libs/grpc/deps/grpc/src/core/ext/transport/chttp2/transport/stream_map.h b/legacy-libs/grpc/deps/grpc/src/core/ext/transport/chttp2/transport/stream_map.h
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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>
+
+/* 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 */