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/*
*
* Copyright 2016, 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_CORE_EXT_CLIENT_CHANNEL_SUBCHANNEL_INDEX_H
#define GRPC_CORE_EXT_CLIENT_CHANNEL_SUBCHANNEL_INDEX_H
#include "src/core/ext/client_channel/connector.h"
#include "src/core/ext/client_channel/subchannel.h"
/** \file Provides an index of active subchannels so that they can be
shared amongst channels */
typedef struct grpc_subchannel_key grpc_subchannel_key;
/** Create a key that can be used to uniquely identify a subchannel */
grpc_subchannel_key *grpc_subchannel_key_create(
grpc_connector *con, const grpc_subchannel_args *args);
/** Destroy a subchannel key */
void grpc_subchannel_key_destroy(grpc_exec_ctx *exec_ctx,
grpc_subchannel_key *key);
/** Given a subchannel key, find the subchannel registered for it.
Returns NULL if no such channel exists.
Thread-safe. */
grpc_subchannel *grpc_subchannel_index_find(grpc_exec_ctx *exec_ctx,
grpc_subchannel_key *key);
/** Register a subchannel against a key.
Takes ownership of \a constructed.
Returns the registered subchannel. This may be different from
\a constructed in the case of a registration race. */
grpc_subchannel *grpc_subchannel_index_register(grpc_exec_ctx *exec_ctx,
grpc_subchannel_key *key,
grpc_subchannel *constructed);
/** Remove \a constructed as the registered subchannel for \a key. */
void grpc_subchannel_index_unregister(grpc_exec_ctx *exec_ctx,
grpc_subchannel_key *key,
grpc_subchannel *constructed);
/** Initialize the subchannel index (global) */
void grpc_subchannel_index_init(void);
/** Shutdown the subchannel index (global) */
void grpc_subchannel_index_shutdown(void);
#endif /* GRPC_CORE_EXT_CLIENT_CHANNEL_SUBCHANNEL_INDEX_H */
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