move libevent into base

third_party/libevent/sample/signal-test.c

-/*
- * Compile with:
- * cc -I/usr/local/include -o signal-test \
- *   signal-test.c -L/usr/local/lib -levent
- */
-
-#include <sys/types.h>
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <sys/stat.h>
-#ifndef WIN32
-#include <sys/queue.h>
-#include <unistd.h>
-#include <sys/time.h>
-#else
-#include <windows.h>
-#endif
-#include <signal.h>
-#include <fcntl.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-
-#include <event.h>
-
-int called = 0;
-
-static void
-signal_cb(int fd, short event, void *arg)
-{
-        struct event *signal = arg;
-
-        printf("%s: got signal %d\n", __func__, EVENT_SIGNAL(signal));
-
-        if (called >= 2)
-                event_del(signal);
-
-        called++;
-}
-
-int
-main (int argc, char **argv)
-{
-        struct event signal_int;
-
-        /* Initalize the event library */
-        struct event_base* base = event_base_new();
-
-        /* Initalize one event */
-        event_set(&signal_int, SIGINT, EV_SIGNAL|EV_PERSIST, signal_cb,
-            &signal_int);
-        event_base_set(base, &signal_int);
-
-        event_add(&signal_int, NULL);
-
-        event_base_dispatch(base);
-        event_base_free(base);
-
-        return (0);
-}
-