text: /*
   * Copyright (c) 2003-2007 Niels Provos <provos@citi.umich.edu>
   * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
   *
   * 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.
   * 3. 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.
   */
  #include "util-internal.h"
  
  #ifdef _WIN32
  #include <winsock2.h>
  #include <windows.h>
  #endif
  
  #include "event2/event-config.h"
  
  #include <sys/types.h>
  #include <sys/stat.h>
  #ifdef EVENT__HAVE_SYS_TIME_H
  #include <sys/time.h>
  #endif
  #include <sys/queue.h>
  #ifndef _WIN32
  #include <sys/socket.h>
  #include <sys/wait.h>
  #include <signal.h>
  #include <unistd.h>
  #include <netdb.h>
  #endif
  #include <fcntl.h>
  #include <signal.h>
  #include <stdlib.h>
  #include <stdio.h>
  #include <string.h>
  #include <errno.h>
  #include <assert.h>
  #include <ctype.h>
  
  #include "event2/event.h"
  #include "event2/event_struct.h"
  #include "event2/event_compat.h"
  #include "event2/tag.h"
  #include "event2/buffer.h"
  #include "event2/buffer_compat.h"
  #include "event2/util.h"
  #include "event-internal.h"
  #include "evthread-internal.h"
  #include "log-internal.h"
  #include "time-internal.h"
  
  #include "regress.h"
  
  #ifndef _WIN32
  #include "regress.gen.h"
  #endif
  
  evutil_socket_t pair[2];
  int test_ok;
  int called;
  struct event_base *global_base;
  
  static char wbuf[4096];
  static char rbuf[4096];
  static int woff;
  static int roff;
  static int usepersist;
  static struct timeval tset;
  static struct timeval tcalled;
  
  
  #define TEST1	"this is a test"
  
  #ifndef SHUT_WR
  #define SHUT_WR 1
  #endif
  
  #ifdef _WIN32
  #define write(fd,buf,len) send((fd),(buf),(int)(len),0)
  #define read(fd,buf,len) recv((fd),(buf),(int)(len),0)
  #endif
  
  struct basic_cb_args
  {
  	struct event_base *eb;
  	struct event *ev;
  	unsigned int callcount;
  };
  
  static void
  simple_read_cb(evutil_socket_t fd, short event, void *arg)
  {
  	char buf[256];
  	int len;
  
  	len = read(fd, buf, sizeof(buf));
  
  	if (len) {
  		if (!called) {
  			if (event_add(arg, NULL) == -1)
  				exit(1);
  		}
  	} else if (called == 1)
  		test_ok = 1;
  
  	called++;
  }
  
  static void
  basic_read_cb(evutil_socket_t fd, short event, void *data)
  {
  	char buf[256];
  	int len;
  	struct basic_cb_args *arg = data;
  
  	len = read(fd, buf, sizeof(buf));
  
  	if (len < 0) {
  		tt_fail_perror("read (callback)");
  	} else {
  		switch (arg->callcount++) {
  		case 0:	 /* first call: expect to read data; cycle */
  			if (len > 0)
  				return;
  
  			tt_fail_msg("EOF before data read");
  			break;
  
  		case 1:	 /* second call: expect EOF; stop */
  			if (len > 0)
  				tt_fail_msg("not all data read on first cycle");
  			break;
  
  		default:  /* third call: should not happen */
  			tt_fail_msg("too many cycles");
  		}
  	}
  
  	event_del(arg->ev);
  	event_base_loopexit(arg->eb, NULL);
  }
  
  static void
  dummy_read_cb(evutil_socket_t fd, short event, void *arg)
  {
  }
  
  static void
  simple_write_cb(evutil_socket_t fd, short event, void *arg)
  {
  	int len;
  
  	len = write(fd, TEST1, strlen(TEST1) + 1);
  	if (len == -1)
  		test_ok = 0;
  	else
  		test_ok = 1;
  }
  
  static void
  multiple_write_cb(evutil_socket_t fd, short event, void *arg)
  {
  	struct event *ev = arg;
  	int len;
  
  	len = 128;
  	if (woff + len >= (int)sizeof(wbuf))
  		len = sizeof(wbuf) - woff;
  
  	len = write(fd, wbuf + woff, len);
  	if (len == -1) {
  		fprintf(stderr, "%s: write\n", __func__);
  		if (usepersist)
  			event_del(ev);
  		return;
  	}
  
  	woff += len;
  
  	if (woff >= (int)sizeof(wbuf)) {
  		shutdown(fd, SHUT_WR);
  		if (usepersist)
  			event_del(ev);
  		return;
  	}
  
  	if (!usepersist) {
  		if (event_add(ev, NULL) == -1)
  			exit(1);
  	}
  }
  
  static void
  multiple_read_cb(evutil_socket_t fd, short event, void *arg)
  {
  	struct event *ev = arg;
  	int len;
  
  	len = read(fd, rbuf + roff, sizeof(rbuf) - roff);
  	if (len == -1)
  		fprintf(stderr, "%s: read\n", __func__);
  	if (len <= 0) {
  		if (usepersist)
  			event_del(ev);
  		return;
  	}
  
  	roff += len;
  	if (!usepersist) {
  		if (event_add(ev, NULL) == -1)
  			exit(1);
  	}
  }
  
  static void
  timeout_cb(evutil_socket_t fd, short event, void *arg)
  {
  	evutil_gettimeofday(&tcalled, NULL);
  }
  
  struct both {
  	struct event ev;
  	int nread;
  };
  
  static void
  combined_read_cb(evutil_socket_t fd, short event, void *arg)
  {
  	struct both *both = arg;
  	char buf[128];
  	int len;
  
  	len = read(fd, buf, sizeof(buf));
  	if (len == -1)
  		fprintf(stderr, "%s: read\n", __func__);
  	if (len <= 0)
  		return;
  
  	both->nread += len;
  	if (event_add(&both->ev, NULL) == -1)
  		exit(1);
  }
  
  static void
  combined_write_cb(evutil_socket_t fd, short event, void *arg)
  {
  	struct both *both = arg;
  	char buf[128];
  	int len;
  
  	len = sizeof(buf);
  	if (len > both->nread)
  		len = both->nread;
  
  	memset(buf, 'q', len);
  
  	len = write(fd, buf, len);
  	if (len == -1)
  		fprintf(stderr, "%s: write\n", __func__);
  	if (len <= 0) {
  		shutdown(fd, SHUT_WR);
  		return;
  	}
  
  	both->nread -= len;
  	if (event_add(&both->ev, NULL) == -1)
  		exit(1);
  }
  
  /* These macros used to replicate the work of the legacy test wrapper code */
  #define setup_test(x) do {						\
  	if (!in_legacy_test_wrapper) {					\
  		TT_FAIL(("Legacy test %s not wrapped properly", x));	\
  		return;							\
  	}								\
  	} while (0)
  #define cleanup_test() setup_test("cleanup")
  
  static void
  test_simpleread(void)
  {
  	struct event ev;
  
  	/* Very simple read test */
  	setup_test("Simple read: ");
  
  	if (write(pair[0], TEST1, strlen(TEST1)+1) < 0) {
  		tt_fail_perror("write");
  	}
  
  	shutdown(pair[0], SHUT_WR);
  
  	event_set(&ev, pair[1], EV_READ, simple_read_cb, &ev);
  	if (event_add(&ev, NULL) == -1)
  		exit(1);
  	event_dispatch();
  
  	cleanup_test();
  }
  
  static void
  test_simplewrite(void)
  {
  	struct event ev;
  
  	/* Very simple write test */
  	setup_test("Simple write: ");
  
  	event_set(&ev, pair[0], EV_WRITE, simple_write_cb, &ev);
  	if (event_add(&ev, NULL) == -1)
  		exit(1);
  	event_dispatch();
  
  	cleanup_test();
  }
  
  static void
  simpleread_multiple_cb(evutil_socket_t fd, short event, void *arg)
  {
  	if (++called == 2)
  		test_ok = 1;
  }
  
  static void
  test_simpleread_multiple(void)
  {
  	struct event one, two;
  
  	/* Very simple read test */
  	setup_test("Simple read to multiple evens: ");
  
  	if (write(pair[0], TEST1, strlen(TEST1)+1) < 0) {
  		tt_fail_perror("write");
  	}
  
  	shutdown(pair[0], SHUT_WR);
  
  	event_set(&one, pair[1], EV_READ, simpleread_multiple_cb, NULL);
  	if (event_add(&one, NULL) == -1)
  		exit(1);
  	event_set(&two, pair[1], EV_READ, simpleread_multiple_cb, NULL);
  	if (event_add(&two, NULL) == -1)
  		exit(1);
  	event_dispatch();
  
  	cleanup_test();
  }
  
  static int have_closed = 0;
  static int premature_event = 0;
  static void
  simpleclose_close_fd_cb(evutil_socket_t s, short what, void *ptr)
  {
  	evutil_socket_t **fds = ptr;
  	TT_BLATHER(("Closing"));
  	evutil_closesocket(*fds[0]);
  	evutil_closesocket(*fds[1]);
  	*fds[0] = -1;
  	*fds[1] = -1;
  	have_closed = 1;
  }
  
  static void
  record_event_cb(evutil_socket_t s, short what, void *ptr)
  {
  	short *whatp = ptr;
  	if (!have_closed)
  		premature_event = 1;
  	*whatp = what;
  	TT_BLATHER(("Recorded %d on socket %d", (int)what, (int)s));
  }
  
  static void
  test_simpleclose(void *ptr)
  {
  	/* Test that a close of FD is detected as a read and as a write. */
  	struct event_base *base = event_base_new();
  	evutil_socket_t pair1[2]={-1,-1}, pair2[2] = {-1, -1};
  	evutil_socket_t *to_close[2];
  	struct event *rev=NULL, *wev=NULL, *closeev=NULL;
  	struct timeval tv;
  	short got_read_on_close = 0, got_write_on_close = 0;
  	char buf[1024];
  	memset(buf, 99, sizeof(buf));
  #ifdef _WIN32
  #define LOCAL_SOCKETPAIR_AF AF_INET
  #else
  #define LOCAL_SOCKETPAIR_AF AF_UNIX
  #endif
  	if (evutil_socketpair(LOCAL_SOCKETPAIR_AF, SOCK_STREAM, 0, pair1)<0)
  		TT_DIE(("socketpair: %s", strerror(errno)));
  	if (evutil_socketpair(LOCAL_SOCKETPAIR_AF, SOCK_STREAM, 0, pair2)<0)
  		TT_DIE(("socketpair: %s", strerror(errno)));
  	if (evutil_make_socket_nonblocking(pair1[1]) < 0)
  		TT_DIE(("make_socket_nonblocking"));
  	if (evutil_make_socket_nonblocking(pair2[1]) < 0)
  		TT_DIE(("make_socket_nonblocking"));
  
  	/** Stuff pair2[1] full of data, until write fails */
  	while (1) {
  		int r = write(pair2[1], buf, sizeof(buf));
  		if (r<0) {
  			int err = evutil_socket_geterror(pair2[1]);
  			if (! EVUTIL_ERR_RW_RETRIABLE(err))
  				TT_DIE(("write failed strangely: %s",
  					evutil_socket_error_to_string(err)));
  			break;
  		}
  	}
  	to_close[0] = &pair1[0];
  	to_close[1] = &pair2[0];
  
  	closeev = event_new(base, -1, EV_TIMEOUT, simpleclose_close_fd_cb,
  	    to_close);
  	rev = event_new(base, pair1[1], EV_READ, record_event_cb,
  	    &got_read_on_close);
  	TT_BLATHER(("Waiting for read on %d", (int)pair1[1]));
  	wev = event_new(base, pair2[1], EV_WRITE, record_event_cb,
  	    &got_write_on_close);
  	TT_BLATHER(("Waiting for write on %d", (int)pair2[1]));
  	tv.tv_sec = 0;
  	tv.tv_usec = 100*1000; /* Close pair1[0] after a little while, and make
  			       * sure we get a read event. */
  	event_add(closeev, &tv);
  	event_add(rev, NULL);
  	event_add(wev, NULL);
  	/* Don't let the test go on too long. */
  	tv.tv_sec = 0;
  	tv.tv_usec = 200*1000;
  	event_base_loopexit(base, &tv);
  	event_base_loop(base, 0);
  
  	tt_int_op(got_read_on_close, ==, EV_READ);
  	tt_int_op(got_write_on_close, ==, EV_WRITE);
  	tt_int_op(premature_event, ==, 0);
  
  end:
  	if (pair1[0] >= 0)
  		evutil_closesocket(pair1[0]);
  	if (pair1[1] >= 0)
  		evutil_closesocket(pair1[1]);
  	if (pair2[0] >= 0)
  		evutil_closesocket(pair2[0]);
  	if (pair2[1] >= 0)
  		evutil_closesocket(pair2[1]);
  	if (rev)
  		event_free(rev);
  	if (wev)
  		event_free(wev);
  	if (closeev)
  		event_free(closeev);
  	if (base)
  		event_base_free(base);
  }
  
  
  static void
  test_multiple(void)
  {
  	struct event ev, ev2;
  	int i;
  
  	/* Multiple read and write test */
  	setup_test("Multiple read/write: ");
  	memset(rbuf, 0, sizeof(rbuf));
  	for (i = 0; i < (int)sizeof(wbuf); i++)
  		wbuf[i] = i;
  
  	roff = woff = 0;
  	usepersist = 0;
  
  	event_set(&ev, pair[0], EV_WRITE, multiple_write_cb, &ev);
  	if (event_add(&ev, NULL) == -1)
  		exit(1);
  	event_set(&ev2, pair[1], EV_READ, multiple_read_cb, &ev2);
  	if (event_add(&ev2, NULL) == -1)
  		exit(1);
  	event_dispatch();
  
  	if (roff == woff)
  		test_ok = memcmp(rbuf, wbuf, sizeof(wbuf)) == 0;
  
  	cleanup_test();
  }
  
  static void
  test_persistent(void)
  {
  	struct event ev, ev2;
  	int i;
  
  	/* Multiple read and write test with persist */
  	setup_test("Persist read/write: ");
  	memset(rbuf, 0, sizeof(rbuf));
  	for (i = 0; i < (int)sizeof(wbuf); i++)
  		wbuf[i] = i;
  
  	roff = woff = 0;
  	usepersist = 1;
  
  	event_set(&ev, pair[0], EV_WRITE|EV_PERSIST, multiple_write_cb, &ev);
  	if (event_add(&ev, NULL) == -1)
  		exit(1);
  	event_set(&ev2, pair[1], EV_READ|EV_PERSIST, multiple_read_cb, &ev2);
  	if (event_add(&ev2, NULL) == -1)
  		exit(1);
  	event_dispatch();
  
  	if (roff == woff)
  		test_ok = memcmp(rbuf, wbuf, sizeof(wbuf)) == 0;
  
  	cleanup_test();
  }
  
  static void
  test_combined(void)
  {
  	struct both r1, r2, w1, w2;
  
  	setup_test("Combined read/write: ");
  	memset(&r1, 0, sizeof(r1));
  	memset(&r2, 0, sizeof(r2));
  	memset(&w1, 0, sizeof(w1));
  	memset(&w2, 0, sizeof(w2));
  
  	w1.nread = 4096;
  	w2.nread = 8192;
  
  	event_set(&r1.ev, pair[0], EV_READ, combined_read_cb, &r1);
  	event_set(&w1.ev, pair[0], EV_WRITE, combined_write_cb, &w1);
  	event_set(&r2.ev, pair[1], EV_READ, combined_read_cb, &r2);
  	event_set(&w2.ev, pair[1], EV_WRITE, combined_write_cb, &w2);
  	tt_assert(event_add(&r1.ev, NULL) != -1);
  	tt_assert(!event_add(&w1.ev, NULL));
  	tt_assert(!event_add(&r2.ev, NULL));
  	tt_assert(!event_add(&w2.ev, NULL));
  	event_dispatch();
  
  	if (r1.nread == 8192 && r2.nread == 4096)
  		test_ok = 1;
  
  end:
  	cleanup_test();
  }
  
  static void
  test_simpletimeout(void)
  {
  	struct timeval tv;
  	struct event ev;
  
  	setup_test("Simple timeout: ");
  
  	tv.tv_usec = 200*1000;
  	tv.tv_sec = 0;
  	evutil_timerclear(&tcalled);
  	evtimer_set(&ev, timeout_cb, NULL);
  	evtimer_add(&ev, &tv);
  
  	evutil_gettimeofday(&tset, NULL);
  	event_dispatch();
  	test_timeval_diff_eq(&tset, &tcalled, 200);
  
  	test_ok = 1;
  end:
  	cleanup_test();
  }
  
  static void
  periodic_timeout_cb(evutil_socket_t fd, short event, void *arg)
  {
  	int *count = arg;
  
  	(*count)++;
  	if (*count == 6) {
  		/* call loopexit only once - on slow machines(?), it is
  		 * apparently possible for this to get called twice. */
  		test_ok = 1;
  		event_base_loopexit(global_base, NULL);
  	}
  }
  
  static void
  test_persistent_timeout(void)
  {
  	struct timeval tv;
  	struct event ev;
  	int count = 0;
  
  	evutil_timerclear(&tv);
  	tv.tv_usec = 10000;
  
  	event_assign(&ev, global_base, -1, EV_TIMEOUT|EV_PERSIST,
  	    periodic_timeout_cb, &count);
  	event_add(&ev, &tv);
  
  	event_dispatch();
  
  	event_del(&ev);
  }
  
  static void
  test_persistent_timeout_jump(void *ptr)
  {
  	struct basic_test_data *data = ptr;
  	struct event ev;
  	int count = 0;
  	struct timeval msec100 = { 0, 100 * 1000 };
  	struct timeval msec50 = { 0, 50 * 1000 };
  	struct timeval msec300 = { 0, 300 * 1000 };
  
  	event_assign(&ev, data->base, -1, EV_PERSIST, periodic_timeout_cb, &count);
  	event_add(&ev, &msec100);
  	/* Wait for a bit */
  	evutil_usleep_(&msec300);
  	event_base_loopexit(data->base, &msec50);
  	event_base_dispatch(data->base);
  	tt_int_op(count, ==, 1);
  
  end:
  	event_del(&ev);
  }
  
  struct persist_active_timeout_called {
  	int n;
  	short events[16];
  	struct timeval tvs[16];
  };
  
  static void
  activate_cb(evutil_socket_t fd, short event, void *arg)
  {
  	struct event *ev = arg;
  	event_active(ev, EV_READ, 1);
  }
  
  static void
  persist_active_timeout_cb(evutil_socket_t fd, short event, void *arg)
  {
  	struct persist_active_timeout_called *c = arg;
  	if (c->n < 15) {
  		c->events[c->n] = event;
  		evutil_gettimeofday(&c->tvs[c->n], NULL);
  		++c->n;
  	}
  }
  
  static void
  test_persistent_active_timeout(void *ptr)
  {
  	struct timeval tv, tv2, tv_exit, start;
  	struct event ev;
  	struct persist_active_timeout_called res;
  
  	struct basic_test_data *data = ptr;
  	struct event_base *base = data->base;
  
  	memset(&res, 0, sizeof(res));
  
  	tv.tv_sec = 0;
  	tv.tv_usec = 200 * 1000;
  	event_assign(&ev, base, -1, EV_TIMEOUT|EV_PERSIST,
  	    persist_active_timeout_cb, &res);
  	event_add(&ev, &tv);
  
  	tv2.tv_sec = 0;
  	tv2.tv_usec = 100 * 1000;
  	event_base_once(base, -1, EV_TIMEOUT, activate_cb, &ev, &tv2);
  
  	tv_exit.tv_sec = 0;
  	tv_exit.tv_usec = 600 * 1000;
  	event_base_loopexit(base, &tv_exit);
  
  	event_base_assert_ok_(base);
  	evutil_gettimeofday(&start, NULL);
  
  	event_base_dispatch(base);
  	event_base_assert_ok_(base);
  
  	tt_int_op(res.n, ==, 3);
  	tt_int_op(res.events[0], ==, EV_READ);
  	tt_int_op(res.events[1], ==, EV_TIMEOUT);
  	tt_int_op(res.events[2], ==, EV_TIMEOUT);
  	test_timeval_diff_eq(&start, &res.tvs[0], 100);
  	test_timeval_diff_eq(&start, &res.tvs[1], 300);
  	test_timeval_diff_eq(&start, &res.tvs[2], 500);
  end:
  	event_del(&ev);
  }
  
  struct common_timeout_info {
  	struct event ev;
  	struct timeval called_at;
  	int which;
  	int count;
  };
  
  static void
  common_timeout_cb(evutil_socket_t fd, short event, void *arg)
  {
  	struct common_timeout_info *ti = arg;
  	++ti->count;
  	evutil_gettimeofday(&ti->called_at, NULL);
  	if (ti->count >= 4)
  		event_del(&ti->ev);
  }
  
  static void
  test_common_timeout(void *ptr)
  {
  	struct basic_test_data *data = ptr;
  
  	struct event_base *base = data->base;
  	int i;
  	struct common_timeout_info info[100];
  
  	struct timeval start;
  	struct timeval tmp_100_ms = { 0, 100*1000 };
  	struct timeval tmp_200_ms = { 0, 200*1000 };
  
  	const struct timeval *ms_100, *ms_200;
  
  	ms_100 = event_base_init_common_timeout(base, &tmp_100_ms);
  	ms_200 = event_base_init_common_timeout(base, &tmp_200_ms);
  	tt_assert(ms_100);
  	tt_assert(ms_200);
  	tt_ptr_op(event_base_init_common_timeout(base, &tmp_200_ms),
  	    ==, ms_200);
  	tt_int_op(ms_100->tv_sec, ==, 0);
  	tt_int_op(ms_200->tv_sec, ==, 0);
  	tt_int_op(ms_100->tv_usec, ==, 100000|0x50000000);
  	tt_int_op(ms_200->tv_usec, ==, 200000|0x50100000);
  
  	memset(info, 0, sizeof(info));
  
  	for (i=0; i<100; ++i) {
  		info[i].which = i;
  		event_assign(&info[i].ev, base, -1, EV_TIMEOUT|EV_PERSIST,
  		    common_timeout_cb, &info[i]);
  		if (i % 2) {
  			if ((i%20)==1) {
  				/* Glass-box test: Make sure we survive the
  				 * transition to non-common timeouts. It's
  				 * a little tricky. */
  				event_add(&info[i].ev, ms_200);
  				event_add(&info[i].ev, &tmp_100_ms);
  			} else if ((i%20)==3) {
  				/* Check heap-to-common too. */
  				event_add(&info[i].ev, &tmp_200_ms);
  				event_add(&info[i].ev, ms_100);
  			} else if ((i%20)==5) {
  				/* Also check common-to-common. */
  				event_add(&info[i].ev, ms_200);
  				event_add(&info[i].ev, ms_100);
  			} else {
  				event_add(&info[i].ev, ms_100);
  			}
  		} else {
  			event_add(&info[i].ev, ms_200);
  		}
  	}
  
  	event_base_assert_ok_(base);
  	evutil_gettimeofday(&start, NULL);
  	event_base_dispatch(base);
  
  	event_base_assert_ok_(base);
  
  	for (i=0; i<10; ++i) {
  		tt_int_op(info[i].count, ==, 4);
  		if (i % 2) {
  			test_timeval_diff_eq(&start, &info[i].called_at, 400);
  		} else {
  			test_timeval_diff_eq(&start, &info[i].called_at, 800);
  		}
  	}
  
  	/* Make sure we can free the base with some events in. */
  	for (i=0; i<100; ++i) {
  		if (i % 2) {
  			event_add(&info[i].ev, ms_100);
  		} else {
  			event_add(&info[i].ev, ms_200);
  		}
  	}
  
  end:
  	event_base_free(data->base); /* need to do this here before info is
  				      * out-of-scope */
  	data->base = NULL;
  }
  
  #ifndef _WIN32
  static void signal_cb(evutil_socket_t fd, short event, void *arg);
  
  #define current_base event_global_current_base_
  extern struct event_base *current_base;
  
  static void
  child_signal_cb(evutil_socket_t fd, short event, void *arg)
  {
  	struct timeval tv;
  	int *pint = arg;
  
  	*pint = 1;
  
  	tv.tv_usec = 500000;
  	tv.tv_sec = 0;
  	event_loopexit(&tv);
  }
  
  static void
  test_fork(void)
  {
  	int status, got_sigchld = 0;
  	struct event ev, sig_ev;
  	pid_t pid;
  
  	setup_test("After fork: ");
  
  	tt_assert(current_base);
  	evthread_make_base_notifiable(current_base);
  
  	if (write(pair[0], TEST1, strlen(TEST1)+1) < 0) {
  		tt_fail_perror("write");
  	}
  
  	event_set(&ev, pair[1], EV_READ, simple_read_cb, &ev);
  	if (event_add(&ev, NULL) == -1)
  		exit(1);
  
  	evsignal_set(&sig_ev, SIGCHLD, child_signal_cb, &got_sigchld);
  	evsignal_add(&sig_ev, NULL);
  
  	event_base_assert_ok_(current_base);
  	TT_BLATHER(("Before fork"));
  	if ((pid = regress_fork()) == 0) {
  		/* in the child */
  		TT_BLATHER(("In child, before reinit"));
  		event_base_assert_ok_(current_base);
  		if (event_reinit(current_base) == -1) {
  			fprintf(stdout, "FAILED (reinit)\n");
  			exit(1);
  		}
  		TT_BLATHER(("After reinit"));
  		event_base_assert_ok_(current_base);
  		TT_BLATHER(("After assert-ok"));
  
  		evsignal_del(&sig_ev);
  
  		called = 0;
  
  		event_dispatch();
  
  		event_base_free(current_base);
  
  		/* we do not send an EOF; simple_read_cb requires an EOF
  		 * to set test_ok.  we just verify that the callback was
  		 * called. */
  		exit(test_ok != 0 || called != 2 ? -2 : 76);
  	}
  
  	/* wait for the child to read the data */
  	{
  		const struct timeval tv = { 0, 100000 };
  		evutil_usleep_(&tv);
  	}
  
  	if (write(pair[0], TEST1, strlen(TEST1)+1) < 0) {
  		tt_fail_perror("write");
  	}
  
  	TT_BLATHER(("Before waitpid"));
  	if (waitpid(pid, &status, 0) == -1) {
  		fprintf(stdout, "FAILED (fork)\n");
  		exit(1);
  	}
  	TT_BLATHER(("After waitpid"));
  
  	if (WEXITSTATUS(status) != 76) {
  		fprintf(stdout, "FAILED (exit): %d\n", WEXITSTATUS(status));
  		exit(1);
  	}
  
  	/* test that the current event loop still works */
  	if (write(pair[0], TEST1, strlen(TEST1)+1) < 0) {
  		fprintf(stderr, "%s: write\n", __func__);
  	}
  
  	shutdown(pair[0], SHUT_WR);
  
  	event_dispatch();
  
  	if (!got_sigchld) {
  		fprintf(stdout, "FAILED (sigchld)\n");
  		exit(1);
  	}
  
  	evsignal_del(&sig_ev);
  
  	end:
  	cleanup_test();
  }
  
  static void
  signal_cb_sa(int sig)
  {
  	test_ok = 2;
  }
  
  static void
  signal_cb(evutil_socket_t fd, short event, void *arg)
  {
  	struct event *ev = arg;
  
  	evsignal_del(ev);
  	test_ok = 1;
  }
  
  static void
  test_simplesignal(void)
  {
  	struct event ev;
  	struct itimerval itv;
  
  	setup_test("Simple signal: ");
  	evsignal_set(&ev, SIGALRM, signal_cb, &ev);
  	evsignal_add(&ev, NULL);
  	/* find bugs in which operations are re-ordered */
  	evsignal_del(&ev);
  	evsignal_add(&ev, NULL);
  
  	memset(&itv, 0, sizeof(itv));
  	itv.it_value.tv_sec = 0;
  	itv.it_value.tv_usec = 100000;
  	if (setitimer(ITIMER_REAL, &itv, NULL) == -1)
  		goto skip_simplesignal;
  
  	event_dispatch();
   skip_simplesignal:
  	if (evsignal_del(&ev) == -1)
  		test_ok = 0;
  
  	cleanup_test();
  }
  
  static void
  test_multiplesignal(void)
  {
  	struct event ev_one, ev_two;
  	struct itimerval itv;
  
  	setup_test("Multiple signal: ");
  
  	evsignal_set(&ev_one, SIGALRM, signal_cb, &ev_one);
  	evsignal_add(&ev_one, NULL);
  
  	evsignal_set(&ev_two, SIGALRM, signal_cb, &ev_two);
  	evsignal_add(&ev_two, NULL);
  
  	memset(&itv, 0, sizeof(itv));
  	itv.it_value.tv_sec = 0;
  	itv.it_value.tv_usec = 100000;
  	if (setitimer(ITIMER_REAL, &itv, NULL) == -1)
  		goto skip_simplesignal;
  
  	event_dispatch();
  
   skip_simplesignal:
  	if (evsignal_del(&ev_one) == -1)
  		test_ok = 0;
  	if (evsignal_del(&ev_two) == -1)
  		test_ok = 0;
  
  	cleanup_test();
  }
  
  static void
  test_immediatesignal(void)
  {
  	struct event ev;
  
  	test_ok = 0;
  	evsignal_set(&ev, SIGUSR1, signal_cb, &ev);
  	evsignal_add(&ev, NULL);
  	raise(SIGUSR1);
  	event_loop(EVLOOP_NONBLOCK);
  	evsignal_del(&ev);
  	cleanup_test();
  }
  
  static void
  test_signal_dealloc(void)
  {
  	/* make sure that evsignal_event is event_del'ed and pipe closed */
  	struct event ev;
  	struct event_base *base = event_init();
  	evsignal_set(&ev, SIGUSR1, signal_cb, &ev);
  	evsignal_add(&ev, NULL);
  	evsignal_del(&ev);
  	event_base_free(base);
  	/* If we got here without asserting, we're fine. */
  	test_ok = 1;
  	cleanup_test();
  }
  
  static void
  test_signal_pipeloss(void)
  {
  	/* make sure that the base1 pipe is closed correctly. */
  	struct event_base *base1, *base2;
  	int pipe1;
  	test_ok = 0;
  	base1 = event_init();
  	pipe1 = base1->sig.ev_signal_pair[0];
  	base2 = event_init();
  	event_base_free(base2);
  	event_base_free(base1);
  	if (close(pipe1) != -1 || errno!=EBADF) {
  		/* fd must be closed, so second close gives -1, EBADF */
  		printf("signal pipe not closed. ");
  		test_ok = 0;
  	} else {
  		test_ok = 1;
  	}
  	cleanup_test();
  }
  
  /*
   * make two bases to catch signals, use both of them.  this only works
   * for event mechanisms that use our signal pipe trick.	 kqueue handles
   * signals internally, and all interested kqueues get all the signals.
   */
  static void
  test_signal_switchbase(void)
  {
  	struct event ev1, ev2;
  	struct event_base *base1, *base2;
  	int is_kqueue;
  	test_ok = 0;
  	base1 = event_init();
  	base2 = event_init();
  	is_kqueue = !strcmp(event_get_method(),"kqueue");
  	evsignal_set(&ev1, SIGUSR1, signal_cb, &ev1);
  	evsignal_set(&ev2, SIGUSR1, signal_cb, &ev2);
  	if (event_base_set(base1, &ev1) ||
  	    event_base_set(base2, &ev2) ||
  	    event_add(&ev1, NULL) ||
  	    event_add(&ev2, NULL)) {
  		fprintf(stderr, "%s: cannot set base, add\n", __func__);
  		exit(1);
  	}
  
  	tt_ptr_op(event_get_base(&ev1), ==, base1);
  	tt_ptr_op(event_get_base(&ev2), ==, base2);
  
  	test_ok = 0;
  	/* can handle signal before loop is called */
  	raise(SIGUSR1);
  	event_base_loop(base2, EVLOOP_NONBLOCK);
  	if (is_kqueue) {
  		if (!test_ok)
  			goto end;
  		test_ok = 0;
  	}
  	event_base_loop(base1, EVLOOP_NONBLOCK);
  	if (test_ok && !is_kqueue) {
  		test_ok = 0;
  
  		/* set base1 to handle signals */
  		event_base_loop(base1, EVLOOP_NONBLOCK);
  		raise(SIGUSR1);
  		event_base_loop(base1, EVLOOP_NONBLOCK);
  		event_base_loop(base2, EVLOOP_NONBLOCK);
  	}
  end:
  	event_base_free(base1);
  	event_base_free(base2);
  	cleanup_test();
  }
  
  /*
   * assert that a signal event removed from the event queue really is
   * removed - with no possibility of it's parent handler being fired.
   */
  static void
  test_signal_assert(void)
  {
  	struct event ev;
  	struct event_base *base = event_init();
  	test_ok = 0;
  	/* use SIGCONT so we don't kill ourselves when we signal to nowhere */
  	evsignal_set(&ev, SIGCONT, signal_cb, &ev);
  	evsignal_add(&ev, NULL);
  	/*
  	 * if evsignal_del() fails to reset the handler, it's current handler
  	 * will still point to evsig_handler().
  	 */
  	evsignal_del(&ev);
  
  	raise(SIGCONT);
  #if 0
  	/* only way to verify we were in evsig_handler() */
  	/* XXXX Now there's no longer a good way. */
  	if (base->sig.evsig_caught)
  		test_ok = 0;
  	else
  		test_ok = 1;
  #else
  	test_ok = 1;
  #endif
  
  	event_base_free(base);
  	cleanup_test();
  	return;
  }
  
  /*
   * assert that we restore our previous signal handler properly.
   */
  static void
  test_signal_restore(void)
  {
  	struct event ev;
  	struct event_base *base = event_init();
  #ifdef EVENT__HAVE_SIGACTION
  	struct sigaction sa;
  #endif
  
  	test_ok = 0;
  #ifdef EVENT__HAVE_SIGACTION
  	sa.sa_handler = signal_cb_sa;
  	sa.sa_flags = 0x0;
  	sigemptyset(&sa.sa_mask);
  	if (sigaction(SIGUSR1, &sa, NULL) == -1)
  		goto out;
  #else
  	if (signal(SIGUSR1, signal_cb_sa) == SIG_ERR)
  		goto out;
  #endif
  	evsignal_set(&ev, SIGUSR1, signal_cb, &ev);
  	evsignal_add(&ev, NULL);
  	evsignal_del(&ev);
  
  	raise(SIGUSR1);
  	/* 1 == signal_cb, 2 == signal_cb_sa, we want our previous handler */
  	if (test_ok != 2)
  		test_ok = 0;
  out:
  	event_base_free(base);
  	cleanup_test();
  	return;
  }
  
  static void
  signal_cb_swp(int sig, short event, void *arg)
  {
  	called++;
  	if (called < 5)
  		raise(sig);
  	else
  		event_loopexit(NULL);
  }
  static void
  timeout_cb_swp(evutil_socket_t fd, short event, void *arg)
  {
  	if (called == -1) {
  		struct timeval tv = {5, 0};
  
  		called = 0;
  		evtimer_add((struct event *)arg, &tv);
  		raise(SIGUSR1);
  		return;
  	}
  	test_ok = 0;
  	event_loopexit(NULL);
  }
  
  static void
  test_signal_while_processing(void)
  {
  	struct event_base *base = event_init();
  	struct event ev, ev_timer;
  	struct timeval tv = {0, 0};
  
  	setup_test("Receiving a signal while processing other signal: ");
  
  	called = -1;
  	test_ok = 1;
  	signal_set(&ev, SIGUSR1, signal_cb_swp, NULL);
  	signal_add(&ev, NULL);
  	evtimer_set(&ev_timer, timeout_cb_swp, &ev_timer);
  	evtimer_add(&ev_timer, &tv);
  	event_dispatch();
  
  	event_base_free(base);
  	cleanup_test();
  	return;
  }
  #endif
  
  static void
  test_free_active_base(void *ptr)
  {
  	struct basic_test_data *data = ptr;
  	struct event_base *base1;
  	struct event ev1;
  
  	base1 = event_init();
  	if (base1) {
  		event_assign(&ev1, base1, data->pair[1], EV_READ,
  			     dummy_read_cb, NULL);
  		event_add(&ev1, NULL);
  		event_base_free(base1);	 /* should not crash */
  	} else {
  		tt_fail_msg("failed to create event_base for test");
  	}
  
  	base1 = event_init();
  	tt_assert(base1);
  	event_assign(&ev1, base1, 0, 0, dummy_read_cb, NULL);
  	event_active(&ev1, EV_READ, 1);
  	event_base_free(base1);
  end:
  	;
  }
  
  static void
  test_manipulate_active_events(void *ptr)
  {
  	struct basic_test_data *data = ptr;
  	struct event_base *base = data->base;
  	struct event ev1;
  
  	event_assign(&ev1, base, -1, EV_TIMEOUT, dummy_read_cb, NULL);
  
  	/* Make sure an active event is pending. */
  	event_active(&ev1, EV_READ, 1);
  	tt_int_op(event_pending(&ev1, EV_READ|EV_TIMEOUT|EV_WRITE, NULL),
  	    ==, EV_READ);
  
  	/* Make sure that activating an event twice works. */
  	event_active(&ev1, EV_WRITE, 1);
  	tt_int_op(event_pending(&ev1, EV_READ|EV_TIMEOUT|EV_WRITE, NULL),
  	    ==, EV_READ|EV_WRITE);
  
  end:
  	event_del(&ev1);
  }
  
  static void
  event_selfarg_cb(evutil_socket_t fd, short event, void *arg)
  {
  	struct event *ev = arg;
  	struct event_base *base = event_get_base(ev);
  	event_base_assert_ok_(base);
  	event_base_loopexit(base, NULL);
  	tt_want(ev == event_base_get_running_event(base));
  }
  
  static void
  test_event_new_selfarg(void *ptr)
  {
  	struct basic_test_data *data = ptr;
  	struct event_base *base = data->base;
  	struct event *ev = event_new(base, -1, EV_READ, event_selfarg_cb,
                                       event_self_cbarg());
  
  	event_active(ev, EV_READ, 1);
  	event_base_dispatch(base);
  
  	event_free(ev);
  }
  
  static void
  test_event_assign_selfarg(void *ptr)
  {
  	struct basic_test_data *data = ptr;
  	struct event_base *base = data->base;
  	struct event ev;
  
  	event_assign(&ev, base, -1, EV_READ, event_selfarg_cb,
                       event_self_cbarg());
  	event_active(&ev, EV_READ, 1);
  	event_base_dispatch(base);
  }
  
  static void
  test_bad_assign(void *ptr)
  {
  	struct event ev;
  	int r;
  	/* READ|SIGNAL is not allowed */
  	r = event_assign(&ev, NULL, -1, EV_SIGNAL|EV_READ, dummy_read_cb, NULL);
  	tt_int_op(r,==,-1);
  
  end:
  	;
  }
  
  static int reentrant_cb_run = 0;
  
  static void
  bad_reentrant_run_loop_cb(evutil_socket_t fd, short what, void *ptr)
  {
  	struct event_base *base = ptr;
  	int r;
  	reentrant_cb_run = 1;
  	/* This reentrant call to event_base_loop should be detected and
  	 * should fail */
  	r = event_base_loop(base, 0);
  	tt_int_op(r, ==, -1);
  end:
  	;
  }
  
  static void
  test_bad_reentrant(void *ptr)
  {
  	struct basic_test_data *data = ptr;
  	struct event_base *base = data->base;
  	struct event ev;
  	int r;
  	event_assign(&ev, base, -1,
  	    0, bad_reentrant_run_loop_cb, base);
  
  	event_active(&ev, EV_WRITE, 1);
  	r = event_base_loop(base, 0);
  	tt_int_op(r, ==, 1);
  	tt_int_op(reentrant_cb_run, ==, 1);
  end:
  	;
  }
  
  static int n_write_a_byte_cb=0;
  static int n_read_and_drain_cb=0;
  static int n_activate_other_event_cb=0;
  static void
  write_a_byte_cb(evutil_socket_t fd, short what, void *arg)
  {
  	char buf[] = "x";
  	if (write(fd, buf, 1) == 1)
  		++n_write_a_byte_cb;
  }
  static void
  read_and_drain_cb(evutil_socket_t fd, short what, void *arg)
  {
  	char buf[128];
  	int n;
  	++n_read_and_drain_cb;
  	while ((n = read(fd, buf, sizeof(buf))) > 0)
  		;
  }
  
  static void
  activate_other_event_cb(evutil_socket_t fd, short what, void *other_)
  {
  	struct event *ev_activate = other_;
  	++n_activate_other_event_cb;
  	event_active_later_(ev_activate, EV_READ);
  }
  
  static void
  test_active_later(void *ptr)
  {
  	struct basic_test_data *data = ptr;
  	struct event *ev1, *ev2;
  	struct event ev3, ev4;
  	struct timeval qsec = {0, 100000};
  	ev1 = event_new(data->base, data->pair[0], EV_READ|EV_PERSIST, read_and_drain_cb, NULL);
  	ev2 = event_new(data->base, data->pair[1], EV_WRITE|EV_PERSIST, write_a_byte_cb, NULL);
  	event_assign(&ev3, data->base, -1, 0, activate_other_event_cb, &ev4);
  	event_assign(&ev4, data->base, -1, 0, activate_other_event_cb, &ev3);
  	event_add(ev1, NULL);
  	event_add(ev2, NULL);
  	event_active_later_(&ev3, EV_READ);
  
  	event_base_loopexit(data->base, &qsec);
  
  	event_base_loop(data->base, 0);
  
  	TT_BLATHER(("%d write calls, %d read calls, %d activate-other calls.",
  		n_write_a_byte_cb, n_read_and_drain_cb, n_activate_other_event_cb));
  	event_del(&ev3);
  	event_del(&ev4);
  
  	tt_int_op(n_write_a_byte_cb, ==, n_activate_other_event_cb);
  	tt_int_op(n_write_a_byte_cb, >, 100);
  	tt_int_op(n_read_and_drain_cb, >, 100);
  	tt_int_op(n_activate_other_event_cb, >, 100);
  end:
  	;
  }
  
  static void
  test_event_base_new(void *ptr)
  {
  	struct basic_test_data *data = ptr;
  	struct event_base *base = 0;
  	struct event ev1;
  	struct basic_cb_args args;
  
  	int towrite = (int)strlen(TEST1)+1;
  	int len = write(data->pair[0], TEST1, towrite);
  
  	if (len < 0)
  		tt_abort_perror("initial write");
  	else if (len != towrite)
  		tt_abort_printf(("initial write fell short (%d of %d bytes)",
  				 len, towrite));
  
  	if (shutdown(data->pair[0], SHUT_WR))
  		tt_abort_perror("initial write shutdown");
  
  	base = event_base_new();
  	if (!base)
  		tt_abort_msg("failed to create event base");
  
  	args.eb = base;
  	args.ev = &ev1;
  	args.callcount = 0;
  	event_assign(&ev1, base, data->pair[1],
  		     EV_READ|EV_PERSIST, basic_read_cb, &args);
  
  	if (event_add(&ev1, NULL))
  		tt_abort_perror("initial event_add");
  
  	if (event_base_loop(base, 0))
  		tt_abort_msg("unsuccessful exit from event loop");
  
  end:
  	if (base)
  		event_base_free(base);
  }
  
  static void
  test_loopexit(void)
  {
  	struct timeval tv, tv_start, tv_end;
  	struct event ev;
  
  	setup_test("Loop exit: ");
  
  	tv.tv_usec = 0;
  	tv.tv_sec = 60*60*24;
  	evtimer_set(&ev, timeout_cb, NULL);
  	evtimer_add(&ev, &tv);
  
  	tv.tv_usec = 300*1000;
  	tv.tv_sec = 0;
  	event_loopexit(&tv);
  
  	evutil_gettimeofday(&tv_start, NULL);
  	event_dispatch();
  	evutil_gettimeofday(&tv_end, NULL);
  
  	evtimer_del(&ev);
  
  	tt_assert(event_base_got_exit(global_base));
  	tt_assert(!event_base_got_break(global_base));
  
  	test_timeval_diff_eq(&tv_start, &tv_end, 300);
  
  	test_ok = 1;
  end:
  	cleanup_test();
  }
  
  static void
  test_loopexit_multiple(void)
  {
  	struct timeval tv, tv_start, tv_end;
  	struct event_base *base;
  
  	setup_test("Loop Multiple exit: ");
  
  	base = event_base_new();
  
  	tv.tv_usec = 200*1000;
  	tv.tv_sec = 0;
  	event_base_loopexit(base, &tv);
  
  	tv.tv_usec = 0;
  	tv.tv_sec = 3;
  	event_base_loopexit(base, &tv);
  
  	evutil_gettimeofday(&tv_start, NULL);
  	event_base_dispatch(base);
  	evutil_gettimeofday(&tv_end, NULL);
  
  	tt_assert(event_base_got_exit(base));
  	tt_assert(!event_base_got_break(base));
  
  	event_base_free(base);
  
  	test_timeval_diff_eq(&tv_start, &tv_end, 200);
  
  	test_ok = 1;
  
  end:
  	cleanup_test();
  }
  
  static void
  break_cb(evutil_socket_t fd, short events, void *arg)
  {
  	test_ok = 1;
  	event_loopbreak();
  }
  
  static void
  fail_cb(evutil_socket_t fd, short events, void *arg)
  {
  	test_ok = 0;
  }
  
  static void
  test_loopbreak(void)
  {
  	struct event ev1, ev2;
  	struct timeval tv;
  
  	setup_test("Loop break: ");
  
  	tv.tv_sec = 0;
  	tv.tv_usec = 0;
  	evtimer_set(&ev1, break_cb, NULL);
  	evtimer_add(&ev1, &tv);
  	evtimer_set(&ev2, fail_cb, NULL);
  	evtimer_add(&ev2, &tv);
  
  	event_dispatch();
  
  	tt_assert(!event_base_got_exit(global_base));
  	tt_assert(event_base_got_break(global_base));
  
  	evtimer_del(&ev1);
  	evtimer_del(&ev2);
  
  end:
  	cleanup_test();
  }
  
  static struct event *readd_test_event_last_added = NULL;
  static void
  re_add_read_cb(evutil_socket_t fd, short event, void *arg)
  {
  	char buf[256];
  	struct event *ev_other = arg;
  	readd_test_event_last_added = ev_other;
  
  	if (read(fd, buf, sizeof(buf)) < 0) {
  		tt_fail_perror("read");
  	}
  
  	event_add(ev_other, NULL);
  	++test_ok;
  }
  
  static void
  test_nonpersist_readd(void)
  {
  	struct event ev1, ev2;
  
  	setup_test("Re-add nonpersistent events: ");
  	event_set(&ev1, pair[0], EV_READ, re_add_read_cb, &ev2);
  	event_set(&ev2, pair[1], EV_READ, re_add_read_cb, &ev1);
  
  	if (write(pair[0], "Hello", 5) < 0) {
  		tt_fail_perror("write(pair[0])");
  	}
  
  	if (write(pair[1], "Hello", 5) < 0) {
  		tt_fail_perror("write(pair[1])\n");
  	}
  
  	if (event_add(&ev1, NULL) == -1 ||
  	    event_add(&ev2, NULL) == -1) {
  		test_ok = 0;
  	}
  	if (test_ok != 0)
  		exit(1);
  	event_loop(EVLOOP_ONCE);
  	if (test_ok != 2)
  		exit(1);
  	/* At this point, we executed both callbacks.  Whichever one got
  	 * called first added the second, but the second then immediately got
  	 * deleted before its callback was called.  At this point, though, it
  	 * re-added the first.
  	 */
  	if (!readd_test_event_last_added) {
  		test_ok = 0;
  	} else if (readd_test_event_last_added == &ev1) {
  		if (!event_pending(&ev1, EV_READ, NULL) ||
  		    event_pending(&ev2, EV_READ, NULL))
  			test_ok = 0;
  	} else {
  		if (event_pending(&ev1, EV_READ, NULL) ||
  		    !event_pending(&ev2, EV_READ, NULL))
  			test_ok = 0;
  	}
  
  	event_del(&ev1);
  	event_del(&ev2);
  
  	cleanup_test();
  }
  
  struct test_pri_event {
  	struct event ev;
  	int count;
  };
  
  static void
  test_priorities_cb(evutil_socket_t fd, short what, void *arg)
  {
  	struct test_pri_event *pri = arg;
  	struct timeval tv;
  
  	if (pri->count == 3) {
  		event_loopexit(NULL);
  		return;
  	}
  
  	pri->count++;
  
  	evutil_timerclear(&tv);
  	event_add(&pri->ev, &tv);
  }
  
  static void
  test_priorities_impl(int npriorities)
  {
  	struct test_pri_event one, two;
  	struct timeval tv;
  
  	TT_BLATHER(("Testing Priorities %d: ", npriorities));
  
  	event_base_priority_init(global_base, npriorities);
  
  	memset(&one, 0, sizeof(one));
  	memset(&two, 0, sizeof(two));
  
  	timeout_set(&one.ev, test_priorities_cb, &one);
  	if (event_priority_set(&one.ev, 0) == -1) {
  		fprintf(stderr, "%s: failed to set priority", __func__);
  		exit(1);
  	}
  
  	timeout_set(&two.ev, test_priorities_cb, &two);
  	if (event_priority_set(&two.ev, npriorities - 1) == -1) {
  		fprintf(stderr, "%s: failed to set priority", __func__);
  		exit(1);
  	}
  
  	evutil_timerclear(&tv);
  
  	if (event_add(&one.ev, &tv) == -1)
  		exit(1);
  	if (event_add(&two.ev, &tv) == -1)
  		exit(1);
  
  	event_dispatch();
  
  	event_del(&one.ev);
  	event_del(&two.ev);
  
  	if (npriorities == 1) {
  		if (one.count == 3 && two.count == 3)
  			test_ok = 1;
  	} else if (npriorities == 2) {
  		/* Two is called once because event_loopexit is priority 1 */
  		if (one.count == 3 && two.count == 1)
  			test_ok = 1;
  	} else {
  		if (one.count == 3 && two.count == 0)
  			test_ok = 1;
  	}
  }
  
  static void
  test_priorities(void)
  {
  	test_priorities_impl(1);
  	if (test_ok)
  		test_priorities_impl(2);
  	if (test_ok)
  		test_priorities_impl(3);
  }
  
  /* priority-active-inversion: activate a higher-priority event, and make sure
   * it keeps us from running a lower-priority event first. */
  static int n_pai_calls = 0;
  static struct event pai_events[3];
  
  static void
  prio_active_inversion_cb(evutil_socket_t fd, short what, void *arg)
  {
  	int *call_order = arg;
  	*call_order = n_pai_calls++;
  	if (n_pai_calls == 1) {
  		/* This should activate later, even though it shares a
  		   priority with us. */
  		event_active(&pai_events[1], EV_READ, 1);
  		/* This should activate next, since its priority is higher,
  		   even though we activated it second. */
  		event_active(&pai_events[2], EV_TIMEOUT, 1);
  	}
  }
  
  static void
  test_priority_active_inversion(void *data_)
  {
  	struct basic_test_data *data = data_;
  	struct event_base *base = data->base;
  	int call_order[3];
  	int i;
  	tt_int_op(event_base_priority_init(base, 8), ==, 0);
  
  	n_pai_calls = 0;
  	memset(call_order, 0, sizeof(call_order));
  
  	for (i=0;i<3;++i) {
  		event_assign(&pai_events[i], data->base, -1, 0,
  		    prio_active_inversion_cb, &call_order[i]);
  	}
  
  	event_priority_set(&pai_events[0], 4);
  	event_priority_set(&pai_events[1], 4);
  	event_priority_set(&pai_events[2], 0);
  
  	event_active(&pai_events[0], EV_WRITE, 1);
  
  	event_base_dispatch(base);
  	tt_int_op(n_pai_calls, ==, 3);
  	tt_int_op(call_order[0], ==, 0);
  	tt_int_op(call_order[1], ==, 2);
  	tt_int_op(call_order[2], ==, 1);
  end:
  	;
  }
  
  
  static void
  test_multiple_cb(evutil_socket_t fd, short event, void *arg)
  {
  	if (event & EV_READ)
  		test_ok |= 1;
  	else if (event & EV_WRITE)
  		test_ok |= 2;
  }
  
  static void
  test_multiple_events_for_same_fd(void)
  {
     struct event e1, e2;
  
     setup_test("Multiple events for same fd: ");
  
     event_set(&e1, pair[0], EV_READ, test_multiple_cb, NULL);
     event_add(&e1, NULL);
     event_set(&e2, pair[0], EV_WRITE, test_multiple_cb, NULL);
     event_add(&e2, NULL);
     event_loop(EVLOOP_ONCE);
     event_del(&e2);
  
     if (write(pair[1], TEST1, strlen(TEST1)+1) < 0) {
  	   tt_fail_perror("write");
     }
  
     event_loop(EVLOOP_ONCE);
     event_del(&e1);
  
     if (test_ok != 3)
  	   test_ok = 0;
  
     cleanup_test();
  }
  
  int evtag_decode_int(ev_uint32_t *pnumber, struct evbuffer *evbuf);
  int evtag_decode_int64(ev_uint64_t *pnumber, struct evbuffer *evbuf);
  int evtag_encode_tag(struct evbuffer *evbuf, ev_uint32_t number);
  int evtag_decode_tag(ev_uint32_t *pnumber, struct evbuffer *evbuf);
  
  static void
  read_once_cb(evutil_socket_t fd, short event, void *arg)
  {
  	char buf[256];
  	int len;
  
  	len = read(fd, buf, sizeof(buf));
  
  	if (called) {
  		test_ok = 0;
  	} else if (len) {
  		/* Assumes global pair[0] can be used for writing */
  		if (write(pair[0], TEST1, strlen(TEST1)+1) < 0) {
  			tt_fail_perror("write");
  			test_ok = 0;
  		} else {
  			test_ok = 1;
  		}
  	}
  
  	called++;
  }
  
  static void
  test_want_only_once(void)
  {
  	struct event ev;
  	struct timeval tv;
  
  	/* Very simple read test */
  	setup_test("Want read only once: ");
  
  	if (write(pair[0], TEST1, strlen(TEST1)+1) < 0) {
  		tt_fail_perror("write");
  	}
  
  	/* Setup the loop termination */
  	evutil_timerclear(&tv);
  	tv.tv_usec = 300*1000;
  	event_loopexit(&tv);
  
  	event_set(&ev, pair[1], EV_READ, read_once_cb, &ev);
  	if (event_add(&ev, NULL) == -1)
  		exit(1);
  	event_dispatch();
  
  	cleanup_test();
  }
  
  #define TEST_MAX_INT	6
  
  static void
  evtag_int_test(void *ptr)
  {
  	struct evbuffer *tmp = evbuffer_new();
  	ev_uint32_t integers[TEST_MAX_INT] = {
  		0xaf0, 0x1000, 0x1, 0xdeadbeef, 0x00, 0xbef000
  	};
  	ev_uint32_t integer;
  	ev_uint64_t big_int;
  	int i;
  
  	evtag_init();
  
  	for (i = 0; i < TEST_MAX_INT; i++) {
  		int oldlen, newlen;
  		oldlen = (int)EVBUFFER_LENGTH(tmp);
  		evtag_encode_int(tmp, integers[i]);
  		newlen = (int)EVBUFFER_LENGTH(tmp);
  		TT_BLATHER(("encoded 0x%08x with %d bytes",
  			(unsigned)integers[i], newlen - oldlen));
  		big_int = integers[i];
  		big_int *= 1000000000; /* 1 billion */
  		evtag_encode_int64(tmp, big_int);
  	}
  
  	for (i = 0; i < TEST_MAX_INT; i++) {
  		tt_int_op(evtag_decode_int(&integer, tmp), !=, -1);
  		tt_uint_op(integer, ==, integers[i]);
  		tt_int_op(evtag_decode_int64(&big_int, tmp), !=, -1);
  		tt_assert((big_int / 1000000000) == integers[i]);
  	}
  
  	tt_uint_op(EVBUFFER_LENGTH(tmp), ==, 0);
  end:
  	evbuffer_free(tmp);
  }
  
  static void
  evtag_fuzz(void *ptr)
  {
  	u_char buffer[4096];
  	struct evbuffer *tmp = evbuffer_new();
  	struct timeval tv;
  	int i, j;
  
  	int not_failed = 0;
  
  	evtag_init();
  
  	for (j = 0; j < 100; j++) {
  		for (i = 0; i < (int)sizeof(buffer); i++)
  			buffer[i] = rand();
  		evbuffer_drain(tmp, -1);
  		evbuffer_add(tmp, buffer, sizeof(buffer));
  
  		if (evtag_unmarshal_timeval(tmp, 0, &tv) != -1)
  			not_failed++;
  	}
  
  	/* The majority of decodes should fail */
  	tt_int_op(not_failed, <, 10);
  
  	/* Now insert some corruption into the tag length field */
  	evbuffer_drain(tmp, -1);
  	evutil_timerclear(&tv);
  	tv.tv_sec = 1;
  	evtag_marshal_timeval(tmp, 0, &tv);
  	evbuffer_add(tmp, buffer, sizeof(buffer));
  
  	((char *)EVBUFFER_DATA(tmp))[1] = '\xff';
  	if (evtag_unmarshal_timeval(tmp, 0, &tv) != -1) {
  		tt_abort_msg("evtag_unmarshal_timeval should have failed");
  	}
  
  end:
  	evbuffer_free(tmp);
  }
  
  static void
  evtag_tag_encoding(void *ptr)
  {
  	struct evbuffer *tmp = evbuffer_new();
  	ev_uint32_t integers[TEST_MAX_INT] = {
  		0xaf0, 0x1000, 0x1, 0xdeadbeef, 0x00, 0xbef000
  	};
  	ev_uint32_t integer;
  	int i;
  
  	evtag_init();
  
  	for (i = 0; i < TEST_MAX_INT; i++) {
  		int oldlen, newlen;
  		oldlen = (int)EVBUFFER_LENGTH(tmp);
  		evtag_encode_tag(tmp, integers[i]);
  		newlen = (int)EVBUFFER_LENGTH(tmp);
  		TT_BLATHER(("encoded 0x%08x with %d bytes",
  			(unsigned)integers[i], newlen - oldlen));
  	}
  
  	for (i = 0; i < TEST_MAX_INT; i++) {
  		tt_int_op(evtag_decode_tag(&integer, tmp), !=, -1);
  		tt_uint_op(integer, ==, integers[i]);
  	}
  
  	tt_uint_op(EVBUFFER_LENGTH(tmp), ==, 0);
  
  end:
  	evbuffer_free(tmp);
  }
  
  static void
  evtag_test_peek(void *ptr)
  {
  	struct evbuffer *tmp = evbuffer_new();
  	ev_uint32_t u32;
  
  	evtag_marshal_int(tmp, 30, 0);
  	evtag_marshal_string(tmp, 40, "Hello world");
  
  	tt_int_op(evtag_peek(tmp, &u32), ==, 1);
  	tt_int_op(u32, ==, 30);
  	tt_int_op(evtag_peek_length(tmp, &u32), ==, 0);
  	tt_int_op(u32, ==, 1+1+1);
  	tt_int_op(evtag_consume(tmp), ==, 0);
  
  	tt_int_op(evtag_peek(tmp, &u32), ==, 1);
  	tt_int_op(u32, ==, 40);
  	tt_int_op(evtag_peek_length(tmp, &u32), ==, 0);
  	tt_int_op(u32, ==, 1+1+11);
  	tt_int_op(evtag_payload_length(tmp, &u32), ==, 0);
  	tt_int_op(u32, ==, 11);
  
  end:
  	evbuffer_free(tmp);
  }
  
  
  static void
  test_methods(void *ptr)
  {
  	const char **methods = event_get_supported_methods();
  	struct event_config *cfg = NULL;
  	struct event_base *base = NULL;
  	const char *backend;
  	int n_methods = 0;
  
  	tt_assert(methods);
  
  	backend = methods[0];
  	while (*methods != NULL) {
  		TT_BLATHER(("Support method: %s", *methods));
  		++methods;
  		++n_methods;
  	}
  
  	cfg = event_config_new();
  	assert(cfg != NULL);
  
  	tt_int_op(event_config_avoid_method(cfg, backend), ==, 0);
  	event_config_set_flag(cfg, EVENT_BASE_FLAG_IGNORE_ENV);
  
  	base = event_base_new_with_config(cfg);
  	if (n_methods > 1) {
  		tt_assert(base);
  		tt_str_op(backend, !=, event_base_get_method(base));
  	} else {
  		tt_assert(base == NULL);
  	}
  
  end:
  	if (base)
  		event_base_free(base);
  	if (cfg)
  		event_config_free(cfg);
  }
  
  static void
  test_version(void *arg)
  {
  	const char *vstr;
  	ev_uint32_t vint;
  	int major, minor, patch, n;
  
  	vstr = event_get_version();
  	vint = event_get_version_number();
  
  	tt_assert(vstr);
  	tt_assert(vint);
  
  	tt_str_op(vstr, ==, LIBEVENT_VERSION);
  	tt_int_op(vint, ==, LIBEVENT_VERSION_NUMBER);
  
  	n = sscanf(vstr, "%d.%d.%d", &major, &minor, &patch);
  	tt_assert(3 == n);
  	tt_int_op((vint&0xffffff00), ==, ((major<<24)|(minor<<16)|(patch<<8)));
  end:
  	;
  }
  
  static void
  test_base_features(void *arg)
  {
  	struct event_base *base = NULL;
  	struct event_config *cfg = NULL;
  
  	cfg = event_config_new();
  
  	tt_assert(0 == event_config_require_features(cfg, EV_FEATURE_ET));
  
  	base = event_base_new_with_config(cfg);
  	if (base) {
  		tt_int_op(EV_FEATURE_ET, ==,
  		    event_base_get_features(base) & EV_FEATURE_ET);
  	} else {
  		base = event_base_new();
  		tt_int_op(0, ==, event_base_get_features(base) & EV_FEATURE_ET);
  	}
  
  end:
  	if (base)
  		event_base_free(base);
  	if (cfg)
  		event_config_free(cfg);
  }
  
  #ifdef EVENT__HAVE_SETENV
  #define SETENV_OK
  #elif !defined(EVENT__HAVE_SETENV) && defined(EVENT__HAVE_PUTENV)
  static void setenv(const char *k, const char *v, int o_)
  {
  	char b[256];
  	evutil_snprintf(b, sizeof(b), "%s=%s",k,v);
  	putenv(b);
  }
  #define SETENV_OK
  #endif
  
  #ifdef EVENT__HAVE_UNSETENV
  #define UNSETENV_OK
  #elif !defined(EVENT__HAVE_UNSETENV) && defined(EVENT__HAVE_PUTENV)
  static void unsetenv(const char *k)
  {
  	char b[256];
  	evutil_snprintf(b, sizeof(b), "%s=",k);
  	putenv(b);
  }
  #define UNSETENV_OK
  #endif
  
  #if defined(SETENV_OK) && defined(UNSETENV_OK)
  static void
  methodname_to_envvar(const char *mname, char *buf, size_t buflen)
  {
  	char *cp;
  	evutil_snprintf(buf, buflen, "EVENT_NO%s", mname);
  	for (cp = buf; *cp; ++cp) {
  		*cp = EVUTIL_TOUPPER_(*cp);
  	}
  }
  #endif
  
  static void
  test_base_environ(void *arg)
  {
  	struct event_base *base = NULL;
  	struct event_config *cfg = NULL;
  
  #if defined(SETENV_OK) && defined(UNSETENV_OK)
  	const char **basenames;
  	int i, n_methods=0;
  	char varbuf[128];
  	const char *defaultname, *ignoreenvname;
  
  	/* See if unsetenv works before we rely on it. */
  	setenv("EVENT_NOWAFFLES", "1", 1);
  	unsetenv("EVENT_NOWAFFLES");
  	if (getenv("EVENT_NOWAFFLES") != NULL) {
  #ifndef EVENT__HAVE_UNSETENV
  		TT_DECLARE("NOTE", ("Can't fake unsetenv; skipping test"));
  #else
  		TT_DECLARE("NOTE", ("unsetenv doesn't work; skipping test"));
  #endif
  		tt_skip();
  	}
  
  	basenames = event_get_supported_methods();
  	for (i = 0; basenames[i]; ++i) {
  		methodname_to_envvar(basenames[i], varbuf, sizeof(varbuf));
  		unsetenv(varbuf);
  		++n_methods;
  	}
  
  	base = event_base_new();
  	tt_assert(base);
  
  	defaultname = event_base_get_method(base);
  	TT_BLATHER(("default is <%s>", defaultname));
  	event_base_free(base);
  	base = NULL;
  
  	/* Can we disable the method with EVENT_NOfoo ? */
  	if (!strcmp(defaultname, "epoll (with changelist)")) {
   		setenv("EVENT_NOEPOLL", "1", 1);
  		ignoreenvname = "epoll";
  	} else {
  		methodname_to_envvar(defaultname, varbuf, sizeof(varbuf));
  		setenv(varbuf, "1", 1);
  		ignoreenvname = defaultname;
  	}
  
  	/* Use an empty cfg rather than NULL so a failure doesn't exit() */
  	cfg = event_config_new();
  	base = event_base_new_with_config(cfg);
  	event_config_free(cfg);
  	cfg = NULL;
  	if (n_methods == 1) {
  		tt_assert(!base);
  	} else {
  		tt_assert(base);
  		tt_str_op(defaultname, !=, event_base_get_method(base));
  		event_base_free(base);
  		base = NULL;
  	}
  
  	/* Can we disable looking at the environment with IGNORE_ENV ? */
  	cfg = event_config_new();
  	event_config_set_flag(cfg, EVENT_BASE_FLAG_IGNORE_ENV);
  	base = event_base_new_with_config(cfg);
  	tt_assert(base);
  	tt_str_op(ignoreenvname, ==, event_base_get_method(base));
  #else
  	tt_skip();
  #endif
  
  end:
  	if (base)
  		event_base_free(base);
  	if (cfg)
  		event_config_free(cfg);
  }
  
  static void
  read_called_once_cb(evutil_socket_t fd, short event, void *arg)
  {
  	tt_int_op(event, ==, EV_READ);
  	called += 1;
  end:
  	;
  }
  
  static void
  timeout_called_once_cb(evutil_socket_t fd, short event, void *arg)
  {
  	tt_int_op(event, ==, EV_TIMEOUT);
  	called += 100;
  end:
  	;
  }
  
  static void
  immediate_called_twice_cb(evutil_socket_t fd, short event, void *arg)
  {
  	tt_int_op(event, ==, EV_TIMEOUT);
  	called += 1000;
  end:
  	;
  }
  
  static void
  test_event_once(void *ptr)
  {
  	struct basic_test_data *data = ptr;
  	struct timeval tv;
  	int r;
  
  	tv.tv_sec = 0;
  	tv.tv_usec = 50*1000;
  	called = 0;
  	r = event_base_once(data->base, data->pair[0], EV_READ,
  	    read_called_once_cb, NULL, NULL);
  	tt_int_op(r, ==, 0);
  	r = event_base_once(data->base, -1, EV_TIMEOUT,
  	    timeout_called_once_cb, NULL, &tv);
  	tt_int_op(r, ==, 0);
  	r = event_base_once(data->base, -1, 0, NULL, NULL, NULL);
  	tt_int_op(r, <, 0);
  	r = event_base_once(data->base, -1, EV_TIMEOUT,
  	    immediate_called_twice_cb, NULL, NULL);
  	tt_int_op(r, ==, 0);
  	tv.tv_sec = 0;
  	tv.tv_usec = 0;
  	r = event_base_once(data->base, -1, EV_TIMEOUT,
  	    immediate_called_twice_cb, NULL, &tv);
  	tt_int_op(r, ==, 0);
  
  	if (write(data->pair[1], TEST1, strlen(TEST1)+1) < 0) {
  		tt_fail_perror("write");
  	}
  
  	shutdown(data->pair[1], SHUT_WR);
  
  	event_base_dispatch(data->base);
  
  	tt_int_op(called, ==, 2101);
  end:
  	;
  }
  
  static void
  test_event_pending(void *ptr)
  {
  	struct basic_test_data *data = ptr;
  	struct event *r=NULL, *w=NULL, *t=NULL;
  	struct timeval tv, now, tv2;
  
  	tv.tv_sec = 0;
  	tv.tv_usec = 500 * 1000;
  	r = event_new(data->base, data->pair[0], EV_READ, simple_read_cb,
  	    NULL);
  	w = event_new(data->base, data->pair[1], EV_WRITE, simple_write_cb,
  	    NULL);
  	t = evtimer_new(data->base, timeout_cb, NULL);
  
  	tt_assert(r);
  	tt_assert(w);
  	tt_assert(t);
  
  	evutil_gettimeofday(&now, NULL);
  	event_add(r, NULL);
  	event_add(t, &tv);
  
  	tt_assert( event_pending(r, EV_READ, NULL));
  	tt_assert(!event_pending(w, EV_WRITE, NULL));
  	tt_assert(!event_pending(r, EV_WRITE, NULL));
  	tt_assert( event_pending(r, EV_READ|EV_WRITE, NULL));
  	tt_assert(!event_pending(r, EV_TIMEOUT, NULL));
  	tt_assert( event_pending(t, EV_TIMEOUT, NULL));
  	tt_assert( event_pending(t, EV_TIMEOUT, &tv2));
  
  	tt_assert(evutil_timercmp(&tv2, &now, >));
  
  	test_timeval_diff_eq(&now, &tv2, 500);
  
  end:
  	if (r) {
  		event_del(r);
  		event_free(r);
  	}
  	if (w) {
  		event_del(w);
  		event_free(w);
  	}
  	if (t) {
  		event_del(t);
  		event_free(t);
  	}
  }
  
  #ifndef _WIN32
  /* You can't do this test on windows, since dup2 doesn't work on sockets */
  
  static void
  dfd_cb(evutil_socket_t fd, short e, void *data)
  {
  	*(int*)data = (int)e;
  }
  
  /* Regression test for our workaround for a fun epoll/linux related bug
   * where fd2 = dup(fd1); add(fd2); close(fd2); dup2(fd1,fd2); add(fd2)
   * will get you an EEXIST */
  static void
  test_dup_fd(void *arg)
  {
  	struct basic_test_data *data = arg;
  	struct event_base *base = data->base;
  	struct event *ev1=NULL, *ev2=NULL;
  	int fd, dfd=-1;
  	int ev1_got, ev2_got;
  
  	tt_int_op(write(data->pair[0], "Hello world",
  		strlen("Hello world")), >, 0);
  	fd = data->pair[1];
  
  	dfd = dup(fd);
  	tt_int_op(dfd, >=, 0);
  
  	ev1 = event_new(base, fd, EV_READ|EV_PERSIST, dfd_cb, &ev1_got);
  	ev2 = event_new(base, dfd, EV_READ|EV_PERSIST, dfd_cb, &ev2_got);
  	ev1_got = ev2_got = 0;
  	event_add(ev1, NULL);
  	event_add(ev2, NULL);
  	event_base_loop(base, EVLOOP_ONCE);
  	tt_int_op(ev1_got, ==, EV_READ);
  	tt_int_op(ev2_got, ==, EV_READ);
  
  	/* Now close and delete dfd then dispatch.  We need to do the
  	 * dispatch here so that when we add it later, we think there
  	 * was an intermediate delete. */
  	close(dfd);
  	event_del(ev2);
  	ev1_got = ev2_got = 0;
  	event_base_loop(base, EVLOOP_ONCE);
  	tt_want_int_op(ev1_got, ==, EV_READ);
  	tt_int_op(ev2_got, ==, 0);
  
  	/* Re-duplicate the fd.  We need to get the same duplicated
  	 * value that we closed to provoke the epoll quirk.  Also, we
  	 * need to change the events to write, or else the old lingering
  	 * read event will make the test pass whether the change was
  	 * successful or not. */
  	tt_int_op(dup2(fd, dfd), ==, dfd);
  	event_free(ev2);
  	ev2 = event_new(base, dfd, EV_WRITE|EV_PERSIST, dfd_cb, &ev2_got);
  	event_add(ev2, NULL);
  	ev1_got = ev2_got = 0;
  	event_base_loop(base, EVLOOP_ONCE);
  	tt_want_int_op(ev1_got, ==, EV_READ);
  	tt_int_op(ev2_got, ==, EV_WRITE);
  
  end:
  	if (ev1)
  		event_free(ev1);
  	if (ev2)
  		event_free(ev2);
  	if (dfd >= 0)
  		close(dfd);
  }
  #endif
  
  #ifdef EVENT__DISABLE_MM_REPLACEMENT
  static void
  test_mm_functions(void *arg)
  {
  	tinytest_set_test_skipped_();
  }
  #else
  static int
  check_dummy_mem_ok(void *mem_)
  {
  	char *mem = mem_;
  	mem -= 16;
  	return !memcmp(mem, "{[<guardedram>]}", 16);
  }
  
  static void *
  dummy_malloc(size_t len)
  {
  	char *mem = malloc(len+16);
  	memcpy(mem, "{[<guardedram>]}", 16);
  	return mem+16;
  }
  
  static void *
  dummy_realloc(void *mem_, size_t len)
  {
  	char *mem = mem_;
  	if (!mem)
  		return dummy_malloc(len);
  	tt_want(check_dummy_mem_ok(mem_));
  	mem -= 16;
  	mem = realloc(mem, len+16);
  	return mem+16;
  }
  
  static void
  dummy_free(void *mem_)
  {
  	char *mem = mem_;
  	tt_want(check_dummy_mem_ok(mem_));
  	mem -= 16;
  	free(mem);
  }
  
  static void
  test_mm_functions(void *arg)
  {
  	struct event_base *b = NULL;
  	struct event_config *cfg = NULL;
  	event_set_mem_functions(dummy_malloc, dummy_realloc, dummy_free);
  	cfg = event_config_new();
  	event_config_avoid_method(cfg, "Nonesuch");
  	b = event_base_new_with_config(cfg);
  	tt_assert(b);
  	tt_assert(check_dummy_mem_ok(b));
  end:
  	if (cfg)
  		event_config_free(cfg);
  	if (b)
  		event_base_free(b);
  }
  #endif
  
  static void
  many_event_cb(evutil_socket_t fd, short event, void *arg)
  {
  	int *calledp = arg;
  	*calledp += 1;
  }
  
  static void
  test_many_events(void *arg)
  {
  	/* Try 70 events that should all be ready at once.  This will
  	 * exercise the "resize" code on most of the backends, and will make
  	 * sure that we can get past the 64-handle limit of some windows
  	 * functions. */
  #define MANY 70
  
  	struct basic_test_data *data = arg;
  	struct event_base *base = data->base;
  	int one_at_a_time = data->setup_data != NULL;
  	evutil_socket_t sock[MANY];
  	struct event *ev[MANY];
  	int called[MANY];
  	int i;
  	int loopflags = EVLOOP_NONBLOCK, evflags=0;
  	if (one_at_a_time) {
  		loopflags |= EVLOOP_ONCE;
  		evflags = EV_PERSIST;
  	}
  
  	memset(sock, 0xff, sizeof(sock));
  	memset(ev, 0, sizeof(ev));
  	memset(called, 0, sizeof(called));
  
  	for (i = 0; i < MANY; ++i) {
  		/* We need an event that will hit the backend, and that will
  		 * be ready immediately.  "Send a datagram" is an easy
  		 * instance of that. */
  		sock[i] = socket(AF_INET, SOCK_DGRAM, 0);
  		tt_assert(sock[i] >= 0);
  		called[i] = 0;
  		ev[i] = event_new(base, sock[i], EV_WRITE|evflags,
  		    many_event_cb, &called[i]);
  		event_add(ev[i], NULL);
  		if (one_at_a_time)
  			event_base_loop(base, EVLOOP_NONBLOCK|EVLOOP_ONCE);
  	}
  
  	event_base_loop(base, loopflags);
  
  	for (i = 0; i < MANY; ++i) {
  		if (one_at_a_time)
  			tt_int_op(called[i], ==, MANY - i + 1);
  		else
  			tt_int_op(called[i], ==, 1);
  	}
  
  end:
  	for (i = 0; i < MANY; ++i) {
  		if (ev[i])
  			event_free(ev[i]);
  		if (sock[i] >= 0)
  			evutil_closesocket(sock[i]);
  	}
  #undef MANY
  }
  
  static void
  test_struct_event_size(void *arg)
  {
  	tt_int_op(event_get_struct_event_size(), <=, sizeof(struct event));
  end:
  	;
  }
  
  struct testcase_t main_testcases[] = {
  	/* Some converted-over tests */
  	{ "methods", test_methods, TT_FORK, NULL, NULL },
  	{ "version", test_version, 0, NULL, NULL },
  	BASIC(base_features, TT_FORK|TT_NO_LOGS),
  	{ "base_environ", test_base_environ, TT_FORK, NULL, NULL },
  
  	BASIC(event_base_new, TT_FORK|TT_NEED_SOCKETPAIR),
  	BASIC(free_active_base, TT_FORK|TT_NEED_SOCKETPAIR),
  
  	BASIC(manipulate_active_events, TT_FORK|TT_NEED_BASE),
  	BASIC(event_new_selfarg, TT_FORK|TT_NEED_BASE),
  	BASIC(event_assign_selfarg, TT_FORK|TT_NEED_BASE),
  
  	BASIC(bad_assign, TT_FORK|TT_NEED_BASE|TT_NO_LOGS),
  	BASIC(bad_reentrant, TT_FORK|TT_NEED_BASE|TT_NO_LOGS),
  	BASIC(active_later, TT_FORK|TT_NEED_BASE|TT_NEED_SOCKETPAIR),
  
  	/* These are still using the old API */
  	LEGACY(persistent_timeout, TT_FORK|TT_NEED_BASE),
  	{ "persistent_timeout_jump", test_persistent_timeout_jump, TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
  	{ "persistent_active_timeout", test_persistent_active_timeout,
  	  TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
  	LEGACY(priorities, TT_FORK|TT_NEED_BASE),
  	BASIC(priority_active_inversion, TT_FORK|TT_NEED_BASE),
  	{ "common_timeout", test_common_timeout, TT_FORK|TT_NEED_BASE,
  	  &basic_setup, NULL },
  
  	/* These legacy tests may not all need all of these flags. */
  	LEGACY(simpleread, TT_ISOLATED),
  	LEGACY(simpleread_multiple, TT_ISOLATED),
  	LEGACY(simplewrite, TT_ISOLATED),
  	{ "simpleclose", test_simpleclose, TT_FORK, &basic_setup,
  	  NULL },
  	LEGACY(multiple, TT_ISOLATED),
  	LEGACY(persistent, TT_ISOLATED),
  	LEGACY(combined, TT_ISOLATED),
  	LEGACY(simpletimeout, TT_ISOLATED),
  	LEGACY(loopbreak, TT_ISOLATED),
  	LEGACY(loopexit, TT_ISOLATED),
  	LEGACY(loopexit_multiple, TT_ISOLATED),
  	LEGACY(nonpersist_readd, TT_ISOLATED),
  	LEGACY(multiple_events_for_same_fd, TT_ISOLATED),
  	LEGACY(want_only_once, TT_ISOLATED),
  	{ "event_once", test_event_once, TT_ISOLATED, &basic_setup, NULL },
  	{ "event_pending", test_event_pending, TT_ISOLATED, &basic_setup,
  	  NULL },
  #ifndef _WIN32
  	{ "dup_fd", test_dup_fd, TT_ISOLATED, &basic_setup, NULL },
  #endif
  	{ "mm_functions", test_mm_functions, TT_FORK, NULL, NULL },
  	{ "many_events", test_many_events, TT_ISOLATED, &basic_setup, NULL },
  	{ "many_events_slow_add", test_many_events, TT_ISOLATED, &basic_setup, (void*)1 },
  
  	{ "struct_event_size", test_struct_event_size, 0, NULL, NULL },
  
  #ifndef _WIN32
  	LEGACY(fork, TT_ISOLATED),
  #endif
  	END_OF_TESTCASES
  };
  
  struct testcase_t evtag_testcases[] = {
  	{ "int", evtag_int_test, TT_FORK, NULL, NULL },
  	{ "fuzz", evtag_fuzz, TT_FORK, NULL, NULL },
  	{ "encoding", evtag_tag_encoding, TT_FORK, NULL, NULL },
  	{ "peek", evtag_test_peek, 0, NULL, NULL },
  
  	END_OF_TESTCASES
  };
  
  struct testcase_t signal_testcases[] = {
  #ifndef _WIN32
  	LEGACY(simplesignal, TT_ISOLATED),
  	LEGACY(multiplesignal, TT_ISOLATED),
  	LEGACY(immediatesignal, TT_ISOLATED),
  	LEGACY(signal_dealloc, TT_ISOLATED),
  	LEGACY(signal_pipeloss, TT_ISOLATED),
  	LEGACY(signal_switchbase, TT_ISOLATED|TT_NO_LOGS),
  	LEGACY(signal_restore, TT_ISOLATED),
  	LEGACY(signal_assert, TT_ISOLATED),
  	LEGACY(signal_while_processing, TT_ISOLATED),
  #endif
  	END_OF_TESTCASES
  };
  
  