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Update time-test.c to use event2

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time-test.c wasn't crazy, but it used some old interfaces.

There are probably more cleanups and explanations to do beyond the
ones here.
This commit is contained in:
Nick Mathewson 2010-01-27 01:47:36 -05:00
parent d60a1bd50c
commit f4190bfb85
1 changed files with 41 additions and 18 deletions
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59
sample/time-test.c
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@ -1,4 +1,9 @@
/*
* XXX This sample code was once meant to show how to use the basic Libevent
* interfaces, but it never worked on non-Unix platforms, and some of the
* interfaces have changed since it was first written. It should probably
* be removed or replaced with something better.
*
* Compile with:
* cc -I/usr/local/include -o time-test time-test.c -L/usr/local/lib -levent
*/
@ -22,32 +27,40 @@
#include <string.h>
#include <errno.h>
#include <event.h>
#include <evutil.h>
#include <event2/event.h>
#include <event2/event_struct.h>
#include <event2/util.h>
#ifdef WIN32
#include <winsock2.h>
#endif
#ifdef _EVENT___func__
#define __func__ _EVENT___func__
#endif
int lasttime;
struct timeval lasttime;
int event_is_persistent;
static void
timeout_cb(int fd, short event, void *arg)
timeout_cb(evutil_socket_t fd, short event, void *arg)
{
struct timeval tv;
struct timeval newtime, difference;
struct event *timeout = arg;
int newtime = time(NULL);
double elapsed;
printf("%s: called at %d: %d\n", __func__, newtime,
newtime - lasttime);
evutil_gettimeofday(&newtime, NULL);
evutil_timersub(&newtime, &lasttime, &difference);
elapsed = difference.tv_sec +
(difference.tv_usec / 1.0e6);
printf("timeout_cb called at %d: %.3f seconds elapsed.\n",
(int)newtime.tv_sec, elapsed);
lasttime = newtime;
evutil_timerclear(&tv);
tv.tv_sec = 2;
event_add(timeout, &tv);
if (! event_is_persistent) {
struct timeval tv;
evutil_timerclear(&tv);
tv.tv_sec = 2;
event_add(timeout, &tv);
}
}
int
@ -55,6 +68,8 @@ main (int argc, char **argv)
{
struct event timeout;
struct timeval tv;
struct event_base *base;
int flags;
#ifdef WIN32
WORD wVersionRequested;
@ -66,19 +81,27 @@ main (int argc, char **argv)
err = WSAStartup(wVersionRequested, &wsaData);
#endif
if (argc == 2 && !strcmp(argv[1], "-p")) {
event_is_persistent = 1;
flags = EV_PERSIST;
} else {
event_is_persistent = 0;
flags = 0;
}
/* Initalize the event library */
event_init();
base = event_base_new();
/* Initalize one event */
evtimer_set(&timeout, timeout_cb, &timeout);
event_assign(&timeout, base, -1, flags, timeout_cb, (void*) &timeout);
evutil_timerclear(&tv);
tv.tv_sec = 2;
event_add(&timeout, &tv);
lasttime = time(NULL);
evutil_gettimeofday(&lasttime, NULL);
event_dispatch();
event_base_dispatch(base);
return (0);
}