move libevent into base

third_party/libevent/test/bench.c

-/*
- * Copyright 2003 Niels Provos <provos@citi.umich.edu>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 4. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *
- * Mon 03/10/2003 - Modified by Davide Libenzi <davidel@xmailserver.org>
- *
- *     Added chain event propagation to improve the sensitivity of
- *     the measure respect to the event loop efficency.
- *
- *
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-#ifdef WIN32
-#include <windows.h>
-#else
-#include <sys/socket.h>
-#include <signal.h>
-#include <sys/resource.h>
-#endif
-#include <fcntl.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-#include <errno.h>
-
-#include <event.h>
-#include <evutil.h>
-
-
-static int count, writes, fired;
-static int *pipes;
-static int num_pipes, num_active, num_writes;
-static struct event *events;
-
-static void
-read_cb(int fd, short which, void *arg)
-{
-        long idx = (long) arg, widx = idx + 1;
-        u_char ch;
-
-        count += read(fd, &ch, sizeof(ch));
-        if (writes) {
-                if (widx >= num_pipes)
-                        widx -= num_pipes;
-                write(pipes[2 * widx + 1], "e", 1);
-                writes--;
-                fired++;
-        }
-}
-
-static struct timeval *
-run_once(void)
-{
-        int *cp, space;
-        long i;
-        static struct timeval ts, te;
-
-        for (cp = pipes, i = 0; i < num_pipes; i++, cp += 2) {
-                event_del(&events[i]);
-                event_set(&events[i], cp[0], EV_READ | EV_PERSIST, read_cb, (void *) i);
-                event_add(&events[i], NULL);
-        }
-
-        event_loop(EVLOOP_ONCE | EVLOOP_NONBLOCK);
-
-        fired = 0;
-        space = num_pipes / num_active;
-        space = space * 2;
-        for (i = 0; i < num_active; i++, fired++)
-                write(pipes[i * space + 1], "e", 1);
-
-        count = 0;
-        writes = num_writes;
-        { int xcount = 0;
-        gettimeofday(&ts, NULL);
-        do {
-                event_loop(EVLOOP_ONCE | EVLOOP_NONBLOCK);
-                xcount++;
-        } while (count != fired);
-        gettimeofday(&te, NULL);
-
-        if (xcount != count) fprintf(stderr, "Xcount: %d, Rcount: %d\n", xcount, count);
-        }
-
-        evutil_timersub(&te, &ts, &te);
-
-        return (&te);
-}
-
-int
-main (int argc, char **argv)
-{
-#ifndef WIN32
-        struct rlimit rl;
-#endif
-        int i, c;
-        struct timeval *tv;
-        int *cp;
-
-        num_pipes = 100;
-        num_active = 1;
-        num_writes = num_pipes;
-        while ((c = getopt(argc, argv, "n:a:w:")) != -1) {
-                switch (c) {
-                case 'n':
-                        num_pipes = atoi(optarg);
-                        break;
-                case 'a':
-                        num_active = atoi(optarg);
-                        break;
-                case 'w':
-                        num_writes = atoi(optarg);
-                        break;
-                default:
-                        fprintf(stderr, "Illegal argument \"%c\"\n", c);
-                        exit(1);
-                }
-        }
-
-#ifndef WIN32
-        rl.rlim_cur = rl.rlim_max = num_pipes * 2 + 50;
-        if (setrlimit(RLIMIT_NOFILE, &rl) == -1) {
-                perror("setrlimit");
-                exit(1);
-        }
-#endif
-
-        events = calloc(num_pipes, sizeof(struct event));
-        pipes = calloc(num_pipes * 2, sizeof(int));
-        if (events == NULL || pipes == NULL) {
-                perror("malloc");
-                exit(1);
-        }
-
-        event_init();
-
-        for (cp = pipes, i = 0; i < num_pipes; i++, cp += 2) {
-#ifdef USE_PIPES
-                if (pipe(cp) == -1) {
-#else
-                if (evutil_socketpair(AF_UNIX, SOCK_STREAM, 0, cp) == -1) {
-#endif
-                        perror("pipe");
-                        exit(1);
-                }
-        }
-
-        for (i = 0; i < 25; i++) {
-                tv = run_once();
-                if (tv == NULL)
-                        exit(1);
-                fprintf(stdout, "%ld\n",
-                        tv->tv_sec * 1000000L + tv->tv_usec);
-        }
-
-        exit(0);
-}