| /* 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); |
| } |