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