tor/src/common/compat_libevent.h
Nick Mathewson ad2d8ac073 Use Libevent 2.0's periodic timers where available.
These timers behave better with non-monotonic clocks than our old
ones, and also try harder to make once-per-second events get called
one second apart, rather than one-plus-epsilon seconds apart.

This fixes bug 943 for everybody using Libevent 2.0 or later.
2010-06-25 15:31:46 -04:00

66 lines
2.0 KiB
C

/* Copyright (c) 2009, The Tor Project, Inc. */
/* See LICENSE for licensing information */
#ifndef _TOR_COMPAT_LIBEVENT_H
#define _TOR_COMPAT_LIBEVENT_H
#include "orconfig.h"
struct event;
struct event_base;
#ifdef HAVE_EVENT2_EVENT_H
#include <event2/util.h>
#else
#define evutil_socket_t int
#endif
void configure_libevent_logging(void);
void suppress_libevent_log_msg(const char *msg);
#ifdef HAVE_EVENT2_EVENT_H
#define tor_event_new event_new
#define tor_evtimer_new evtimer_new
#define tor_evsignal_new evsignal_new
#define tor_event_free event_free
#define tor_evdns_add_server_port(sock, tcp, cb, data) \
evdns_add_server_port_with_base(tor_libevent_get_base(), \
(sock),(tcp),(cb),(data));
#else
struct event *tor_event_new(struct event_base * base, evutil_socket_t sock,
short what, void (*cb)(evutil_socket_t, short, void *), void *arg);
struct event *tor_evtimer_new(struct event_base * base,
void (*cb)(evutil_socket_t, short, void *), void *arg);
struct event *tor_evsignal_new(struct event_base * base, int sig,
void (*cb)(evutil_socket_t, short, void *), void *arg);
void tor_event_free(struct event *ev);
#define tor_evdns_add_server_port evdns_add_server_port
#endif
typedef struct periodic_timer_t periodic_timer_t;
periodic_timer_t *periodic_timer_new(struct event_base *base,
const struct timeval *tv,
void (*cb)(periodic_timer_t *timer, void *data),
void *data);
void periodic_timer_free(periodic_timer_t *);
#ifdef HAVE_EVENT_BASE_LOOPEXIT
#define tor_event_base_loopexit event_base_loopexit
#else
struct timeval;
int tor_event_base_loopexit(struct event_base *base, struct timeval *tv);
#endif
void tor_libevent_initialize(void);
struct event_base *tor_libevent_get_base(void);
const char *tor_libevent_get_method(void);
void tor_check_libevent_version(const char *m, int server,
const char **badness_out);
void tor_check_libevent_header_compatibility(void);
const char *tor_libevent_get_version_str(void);
#endif