+++ /dev/null
-/**
- * collectd - src/utils_random.c
- * Copyright (C) 2013 Florian Forster
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * Authors:
- * Florian Forster <octo at collectd.org>
- **/
-
-#include <pthread.h>
-
-#include "collectd.h"
-#include "utils_time.h"
-#include "utils_random.h"
-
-
-static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
-static _Bool have_seed = 0;
-static unsigned short seed[3];
-
-static void cdrand_seed (void)
-{
- cdtime_t t;
-
- if (have_seed)
- return;
-
- t = cdtime();
-
- seed[0] = (unsigned short) t;
- seed[1] = (unsigned short) (t >> 16);
- seed[2] = (unsigned short) (t >> 32);
-
- have_seed = 1;
-}
-
-double cdrand_d (void)
-{
- double r;
-
- pthread_mutex_lock (&lock);
- cdrand_seed ();
- r = erand48 (seed);
- pthread_mutex_unlock (&lock);
-
- return (r);
-}
-
-long cdrand_range (long min, long max)
-{
- long range;
- long r;
-
- range = 1 + max - min;
-
- r = (long) (0.5 + (cdrand_d () * range));
- r += min;
-
- return (r);
-}