1/* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements.  See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License.  You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17/* This is just a quick test program to see how long a wait is
18 * produced by a select loop with an exponential backoff.
19 *
20 *   gcc -g -O2 -o test_select test_select.c
21 *   test_select
22 *
23 * Roy Fielding, 1996
24 */
25
26#include <stdio.h>
27#include <stdlib.h>
28#include <sys/time.h>
29
30int main (void)
31{
32    int srv;
33    long waittime = 4096;
34    struct timeval tv;
35
36    printf("Start\n");
37    while ((waittime > 0) && (waittime < 3000000)) {
38        printf("%d\n", waittime);
39        tv.tv_sec  = waittime/1000000;
40        tv.tv_usec = waittime%1000000;
41        waittime <<= 1;
42        srv = select(0, NULL, NULL, NULL, &tv);
43    }
44    printf("End\n");
45    exit(0);
46}
47