httpd/test/test_select.c

	test_select.c revision 3d81f57512275ca06a60a9bcbd23c1f8b429fdf2
/* Copyright 1999-2006 The Apache Software Foundation or its licensors, as
 * applicable.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* This is just a quick test program to see how long a wait is
 * produced by a select loop with an exponential backoff.
 *
 *   gcc -g -O2 -o test_select test_select.c
 *   test_select
 *
 * Roy Fielding, 1996
 */

#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>

int main (void)
{
    int srv;
    long waittime = 4096;
    struct timeval tv;

    printf("Start\n");
    while ((waittime > 0) && (waittime < 3000000)) {
        printf("%d\n", waittime);
        tv.tv_sec  = waittime/1000000;
        tv.tv_usec = waittime%1000000;
        waittime <<= 1;
        srv = select(0, NULL, NULL, NULL, &tv);
    }
    printf("End\n");
    exit(0);
}