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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_LOAD_REPORTING_LOAD_REPORTING_H
#define GRPC_CORE_EXT_LOAD_REPORTING_LOAD_REPORTING_H
#include "src/core/lib/iomgr/closure.h"
#include "src/core/lib/surface/call.h"
typedef struct grpc_load_reporting_config grpc_load_reporting_config;
/** Call information to be passed to the provided load reporting function upon
* completion of the call */
typedef struct grpc_load_reporting_call_data {
const grpc_call_stats *stats; /**< Stats for the call */
const char *trailing_md_string; /**< LR trailing metadata info */
} grpc_load_reporting_call_data;
/** Custom function to be called by the load reporting filter. */
typedef void (*grpc_load_reporting_fn)(
const grpc_load_reporting_call_data *call_data, void *user_data);
/** Register \a fn as the function to be invoked by the load reporting filter.
* \a fn will be invoked at the beginning and at the end of the call.
*
* For the first invocation, \a fn's first argument
* (grpc_load_reporting_call_data*) will be NULL. \a user_data is always passed
* as-is. */
grpc_load_reporting_config *grpc_load_reporting_config_create(
grpc_load_reporting_fn fn, void *user_data);
grpc_load_reporting_config *grpc_load_reporting_config_copy(
grpc_load_reporting_config *src);
void grpc_load_reporting_config_destroy(grpc_load_reporting_config *lrc);
/** Invoke the function registered by \a grpc_load_reporting_init. */
void grpc_load_reporting_config_call(
grpc_load_reporting_config *lrc,
const grpc_load_reporting_call_data *call_data);
/** Return a \a grpc_arg enabling load reporting */
grpc_arg grpc_load_reporting_config_create_arg(grpc_load_reporting_config *lrc);
#endif /* GRPC_CORE_EXT_LOAD_REPORTING_LOAD_REPORTING_H */
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