timehist.h

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/*
 * util/timehist.h - make histogram of time values.
 *
 * Copyright (c) 2007, NLnet Labs. All rights reserved.
 *
 * This software is open source.
 * 
 * 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 the NLNET LABS 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
 * HOLDER 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 UTIL_TIMEHIST_H
#define UTIL_TIMEHIST_H

#define NUM_BUCKETS_HIST 40

struct th_buck {
    struct timeval lower;
    struct timeval upper;
    size_t count;
};

struct timehist {
    size_t num;
    struct th_buck* buckets;
};

struct timehist* timehist_setup(void);

void timehist_delete(struct timehist* hist);

void timehist_clear(struct timehist* hist);

void timehist_insert(struct timehist* hist, struct timeval* tv);

double timehist_quartile(struct timehist* hist, double q);

void timehist_print(struct timehist* hist);

void timehist_log(struct timehist* hist, const char* name);

void timehist_export(struct timehist* hist, long long* array, size_t sz);

void timehist_import(struct timehist* hist, long long* array, size_t sz);
 
#endif /* UTIL_TIMEHIST_H */