mirror of https://github.com/grpc/grpc.git
Alistair Veitch
10 years ago
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/*
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* |
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* Copyright 2015, Google Inc. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following disclaimer |
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* in the documentation and/or other materials provided with the |
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* distribution. |
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* * Neither the name of Google Inc. nor the names of its |
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* contributors may be used to endorse or promote products derived from |
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* this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#include <stddef.h> |
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#ifndef GRPC_INTERNAL_CORE_CENSUS_AGGREGATION_H |
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#define GRPC_INTERNAL_CORE_CENSUS_AGGREGATION_H |
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/** Structure used to describe an aggregation type. */ |
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struct census_aggregation_ops { |
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/* Create a new aggregation. The pointer returned can be used in future calls
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to clone(), free(), record(), data() and reset(). */ |
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void *(*create)(const void *create_arg); |
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/* Make a copy of an aggregation created by create() */ |
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void *(*clone)(const void *aggregation); |
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/* Destroy an aggregation created by create() */ |
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void (*free)(void *aggregation); |
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/* Record a new value against aggregation. */ |
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void (*record)(void *aggregation, double value); |
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/* Return current aggregation data. The caller must cast this object into
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the correct type for the aggregation result. The object returned can be |
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freed by using free_data(). */ |
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void *(*data)(const void *aggregation); |
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/* free data returned by data() */ |
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void (*free_data)(void *data); |
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/* Reset an aggregation to default (zero) values. */ |
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void (*reset)(void *aggregation); |
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/* Merge 'from' aggregation into 'to'. Both aggregations must be compatible */ |
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void (*merge)(void *to, const void *from); |
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/* Fill buffer with printable string version of aggregation contents. For
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debugging only. Returns the number of bytes added to buffer (a value == n |
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implies the buffer was of insufficient size). */ |
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size_t (*print)(const void *aggregation, char *buffer, size_t n); |
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}; |
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#endif /* GRPC_INTERNAL_CORE_CENSUS_AGGREGATION_H */ |
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