/usr/include/grpc/support/histogram.h is in libgrpc-dev 0.11.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* Copyright 2015, Google Inc.
* All rights reserved.
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* 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
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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*/
#ifndef GRPC_SUPPORT_HISTOGRAM_H
#define GRPC_SUPPORT_HISTOGRAM_H
#include <grpc/support/port_platform.h>
#include <stddef.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct gpr_histogram gpr_histogram;
gpr_histogram *gpr_histogram_create(double resolution, double max_bucket_start);
void gpr_histogram_destroy(gpr_histogram *h);
void gpr_histogram_add(gpr_histogram *h, double x);
/* The following merges the second histogram into the first. It only works
if they have the same buckets and resolution. Returns 0 on failure, 1
on success */
int gpr_histogram_merge(gpr_histogram *dst, gpr_histogram *src);
double gpr_histogram_percentile(gpr_histogram *histogram, double percentile);
double gpr_histogram_mean(gpr_histogram *histogram);
double gpr_histogram_stddev(gpr_histogram *histogram);
double gpr_histogram_variance(gpr_histogram *histogram);
double gpr_histogram_maximum(gpr_histogram *histogram);
double gpr_histogram_minimum(gpr_histogram *histogram);
double gpr_histogram_count(gpr_histogram *histogram);
double gpr_histogram_sum(gpr_histogram *histogram);
double gpr_histogram_sum_of_squares(gpr_histogram *histogram);
const gpr_uint32 *gpr_histogram_get_contents(gpr_histogram *histogram,
size_t *count);
void gpr_histogram_merge_contents(gpr_histogram *histogram,
const gpr_uint32 *data, size_t data_count,
double min_seen, double max_seen, double sum,
double sum_of_squares, double count);
#ifdef __cplusplus
}
#endif
#endif /* GRPC_SUPPORT_HISTOGRAM_H */
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