EV/EV.xs

#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

#include <math.h>
#include <netinet/in.h>

#include <sys/time.h>
#include <time.h>
#include <event.h>
#include <evdns.h>
/*include <evhttp.h>*/ /* does not compile */

#define EV_NONE 0
#define EV_UNDEF -1

#define TIMEOUT_NONE HUGE_VAL

typedef struct event_base *Base;

static HV *stash_base, *stash_event;

static double tv_get (struct timeval *tv)
{
  return tv->tv_sec + tv->tv_usec * 1e-6;
}

static void tv_set (struct timeval *tv, double val)
{
  tv->tv_sec  = (long)val;
  tv->tv_usec = (long)((val - (double)tv->tv_sec) * 1e6);

}

/////////////////////////////////////////////////////////////////////////////
// Event

typedef struct ev {
  struct event ev;
  SV *cb, *fh;
  SV *self; /* contains this struct */
  double timeout;
  double interval;
  unsigned char active;
  unsigned char abstime;
} *Event;

static double
e_now ()
{
  struct timeval tv;
  gettimeofday (&tv, 0);

  return tv_get (&tv);
}

static void e_cb (int fd, short events, void *arg);

static int sv_fileno (SV *fh)
{
  SvGETMAGIC (fh);

  if (SvROK (fh))
    fh = SvRV (fh);

  if (SvTYPE (fh) == SVt_PVGV)
    return PerlIO_fileno (IoIFP (sv_2io (fh)));

  if (SvIOK (fh))
    return SvIV (fh);

  return -1;
}

static Event
e_new (SV *fh, short events, SV *cb)
{
  int fd = sv_fileno (fh);
  Event ev;
  SV *self = NEWSV (0, sizeof (struct ev));
  SvPOK_only (self);
  SvCUR_set (self, sizeof (struct ev));

  ev = (Event)SvPVX (self);

  ev->fh       = newSVsv (fh);
  ev->cb       = newSVsv (cb);
  ev->self     = self;
  ev->timeout  = TIMEOUT_NONE;
  ev->interval = 0.;
  ev->abstime  = 0;
  ev->active   = 0;

  event_set (&ev->ev, fd, events, e_cb, (void *)ev);

  return ev;
}

static struct timeval *
e_tv (Event ev)
{
  static struct timeval tv;
  double to = ev->timeout;

  if (to == TIMEOUT_NONE)
    return 0;

  if (ev->abstime)
    {
      double now = e_now ();

      if (now > to && ev->interval)
        ev->timeout = (to += ceil ((now - to) / ev->interval) * ev->interval);

      to -= now;
    }
  else if (to < 0.)
    to = 0.;

  tv_set (&tv, to);

  return &tv;
}

static SV *e_self (Event ev)
{
  SV *rv;

  if (SvOBJECT (ev->self))
    rv = newRV_inc (ev->self);
  else
    {
      rv = newRV_noinc (ev->self);
      sv_bless (rv, stash_event);
      SvREADONLY_on (ev->self);
    }

  return rv;
}

static int
e_start (Event ev)
{
  if (ev->active) event_del (&ev->ev);
  ev->active = 1;
  return event_add (&ev->ev, e_tv (ev));
}

static int e_stop (Event ev)
{
  return ev->active
    ? (ev->active = 0), event_del (&ev->ev)
    : 0;
}

static void
e_cb (int fd, short events, void *arg)
{
  struct ev *ev = (struct ev*)arg;
  dSP;

  ENTER;
  SAVETMPS;

  if (!(ev->ev.ev_events & EV_PERSIST))
    ev->active = 0;

  PUSHMARK (SP);
  EXTEND (SP, 2);
  PUSHs (sv_2mortal (e_self (ev)));
  PUSHs (sv_2mortal (newSViv (events)));
  PUTBACK;
  call_sv (ev->cb, G_DISCARD | G_VOID | G_EVAL);
  /*TODO: if err, call some logging function */

  if (ev->interval && !ev->active)
    e_start (ev);

  FREETMPS;
  LEAVE;
}

/////////////////////////////////////////////////////////////////////////////
// DNS

static void
dns_cb (int result, char type, int count, int ttl, void *addresses, void *arg)
{
  dSP;
  SV *cb = (SV *)arg;

  ENTER;
  SAVETMPS;
  PUSHMARK (SP);
  EXTEND (SP, count + 3);
  PUSHs (sv_2mortal (newSViv (result)));

  if (result == DNS_ERR_NONE && ttl >= 0)
    {
      int i;

      PUSHs (sv_2mortal (newSViv (type)));
      PUSHs (sv_2mortal (newSViv (ttl)));

      for (i = 0; i < count; ++i)
        switch (type)
          {
            case DNS_IPv6_AAAA:
              PUSHs (sv_2mortal (newSVpvn (i * 16 + (char *)addresses, 16)));
              break;
            case DNS_IPv4_A:
              PUSHs (sv_2mortal (newSVpvn (i *  4 + (char *)addresses,  4)));
              break;
            case DNS_PTR:
              PUSHs (sv_2mortal (newSVpv (*(char **)addresses, 0)));
              break;
          }
    }

  PUTBACK;
  call_sv (sv_2mortal (cb), G_DISCARD | G_VOID | G_EVAL);

  FREETMPS;
  LEAVE;
}

/////////////////////////////////////////////////////////////////////////////
// XS interface functions

MODULE = EV             PACKAGE = EV            PREFIX = event_

BOOT:
{
  HV *stash = gv_stashpv ("EV", 1);

  static const struct {
    const char *name;
    IV iv;
  } *civ, const_iv[] = {
#   define const_iv(pfx, name) { # name, (IV) pfx ## name },
    const_iv (EV_, NONE)
    const_iv (EV_, TIMEOUT)
    const_iv (EV_, READ)
    const_iv (EV_, WRITE)
    const_iv (EV_, SIGNAL)
    const_iv (EV_, PERSIST)
    const_iv (EV, LOOP_ONCE)
    const_iv (EV, LOOP_NONBLOCK)
    const_iv (EV, BUFFER_READ)
    const_iv (EV, BUFFER_WRITE)
    const_iv (EV, BUFFER_EOF)
    const_iv (EV, BUFFER_ERROR)
    const_iv (EV, BUFFER_TIMEOUT)
  };

  for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
    newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));

  stash_base  = gv_stashpv ("EV::Base" , 1);
  stash_event = gv_stashpv ("EV::Event", 1);
}

double now ()
        CODE:
        RETVAL = e_now ();
        OUTPUT:
        RETVAL

const char *version ()
        ALIAS:
        method = 1
        CODE:
        RETVAL = ix ? event_get_method () : event_get_version ();
        OUTPUT:
        RETVAL

Base event_init ()

int event_priority_init (int npri)

int event_dispatch ()

int event_loop (int flags = 0)

int event_loopexit (double after = 0)
        CODE:
{
        struct timeval tv;
        tv_set (&tv, after);
        event_loopexit (&tv);
}

Event event (SV *cb)
        CODE:
        RETVAL = e_new (NEWSV (0, 0), 0, cb);
        OUTPUT:
        RETVAL

Event io (SV *fh, short events, SV *cb)
        ALIAS:
        io_ns = 1
        CODE:
        RETVAL = e_new (fh, events, cb);
        if (!ix) e_start (RETVAL);
        OUTPUT:
        RETVAL

Event timer (double after, int repeat, SV *cb)
        ALIAS:
        timer_ns = 1
        CODE:
        RETVAL = e_new (NEWSV (0, 0), 0, cb);
        RETVAL->timeout  = after;
        RETVAL->interval = repeat;
        if (!ix) e_start (RETVAL);
        OUTPUT:
        RETVAL

Event timer_abs (double at, double interval, SV *cb)
        ALIAS:
        timer_abs_ns = 1
        CODE:
        RETVAL = e_new (NEWSV (0, 0), 0, cb);
        RETVAL->timeout  = at;
        RETVAL->interval = interval;
        RETVAL->abstime  = 1;
        if (!ix) e_start (RETVAL);
        OUTPUT:
        RETVAL

Event signal (SV *signal, SV *cb)
        ALIAS:
        signal_ns = 1
        CODE:
        RETVAL = e_new (signal, EV_SIGNAL | EV_PERSIST, cb);
        if (!ix) e_start (RETVAL);
        OUTPUT:
        RETVAL

PROTOTYPES: DISABLE


MODULE = EV             PACKAGE = EV::Base      PREFIX = event_base_

Base new ()
        CODE:
        RETVAL = event_init ();
        OUTPUT:
        RETVAL

int event_base_dispatch (Base base)

int event_base_loop (Base base, int flags = 0)

int event_base_loopexit (Base base, double after)
        CODE:
{
        struct timeval tv;
        tv.tv_sec  = (long)after;
        tv.tv_usec = (long)(after - tv.tv_sec) * 1e6;
        event_base_loopexit (base, &tv);
}

int event_base_priority_init (Base base, int npri)

void event_base_set (Base base, Event ev)
        C_ARGS: base, &ev->ev

void DESTROY (Base base)
        CODE:
        /*event_base_free (base);*/ /* causes too many problems */


MODULE = EV             PACKAGE = EV::Event     PREFIX = event_

int event_priority_set (Event ev, int pri)
        C_ARGS: &ev->ev, pri

int event_add (Event ev, double timeout = TIMEOUT_NONE)
        CODE:
        ev->timeout = timeout;
        ev->abstime = 0;
        RETVAL = e_start (ev);
        OUTPUT:
        RETVAL

int event_start (Event ev)
        CODE:
        RETVAL = e_start (ev);
        OUTPUT:
        RETVAL

int event_del (Event ev)
        ALIAS:
        stop = 0
        CODE:
        RETVAL = e_stop (ev);
        OUTPUT:
        RETVAL

void DESTROY (Event ev)
        CODE:
        e_stop (ev);
        SvREFCNT_dec (ev->cb);
        SvREFCNT_dec (ev->fh);

SV *cb (Event ev, SV *new_cb = 0)
        CODE:
        RETVAL = newSVsv (ev->cb);
        if (items > 1)
          sv_setsv (ev->cb, new_cb);
        OUTPUT:
        RETVAL

SV *fh (Event ev, SV *new_fh = 0)
        ALIAS:
        signal = 0
        CODE:
        RETVAL = newSVsv (ev->fh);
        if (items > 1)
          {
            if (ev->active) event_del (&ev->ev);
            sv_setsv (ev->fh, new_fh);
            ev->ev.ev_fd = sv_fileno (ev->fh);
            if (ev->active) event_add (&ev->ev, e_tv (ev));
          }
        OUTPUT:
        RETVAL

short events (Event ev, short new_events = EV_UNDEF)
        CODE:
        RETVAL = ev->ev.ev_events;
        if (items > 1)
          {
            if (ev->active) event_del (&ev->ev);
            ev->ev.ev_events = new_events;
            if (ev->active) event_add (&ev->ev, e_tv (ev));
          }
        OUTPUT:
        RETVAL

double timeout (Event ev, double new_timeout = 0., int repeat = 0)
        CODE:
        RETVAL = ev->timeout;
        if (items > 1)
          {
            if (ev->active) event_del (&ev->ev);
            ev->timeout  = new_timeout;
            ev->interval = repeat;
            ev->abstime  = 0;
            if (ev->active) event_add (&ev->ev, e_tv (ev));
          }
        OUTPUT:
        RETVAL

void timeout_abs (Event ev, double at, double interval = 0.)
        CODE:
        if (ev->active) event_del (&ev->ev);
        ev->timeout  = at;
        ev->interval = interval;
        ev->abstime  = 1;
        if (ev->active) event_add (&ev->ev, e_tv (ev));


MODULE = EV             PACKAGE = EV::DNS       PREFIX = evdns_

BOOT:
{
  HV *stash = gv_stashpv ("EV::DNS", 1);

  static const struct {
    const char *name;
    IV iv;
  } *civ, const_iv[] = {
#   define const_iv(pfx, name) { # name, (IV) pfx ## name },

    const_iv (DNS_, ERR_NONE)
    const_iv (DNS_, ERR_FORMAT)
    const_iv (DNS_, ERR_SERVERFAILED)
    const_iv (DNS_, ERR_NOTEXIST)
    const_iv (DNS_, ERR_NOTIMPL)
    const_iv (DNS_, ERR_REFUSED)
    const_iv (DNS_, ERR_TRUNCATED)
    const_iv (DNS_, ERR_UNKNOWN)
    const_iv (DNS_, ERR_TIMEOUT)
    const_iv (DNS_, ERR_SHUTDOWN)
    const_iv (DNS_, IPv4_A)
    const_iv (DNS_, PTR)
    const_iv (DNS_, IPv6_AAAA)
    const_iv (DNS_, QUERY_NO_SEARCH)
    const_iv (DNS_, OPTION_SEARCH)
    const_iv (DNS_, OPTION_NAMESERVERS)
    const_iv (DNS_, OPTION_MISC)
    const_iv (DNS_, OPTIONS_ALL)
    const_iv (DNS_, NO_SEARCH)
  };

  for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
    newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
}

int evdns_init ()

void evdns_shutdown (int fail_requests = 1)

const char *evdns_err_to_string (int err)

int evdns_nameserver_add (U32 address)

int evdns_count_nameservers ()

int evdns_clear_nameservers_and_suspend ()

int evdns_resume ()

int evdns_nameserver_ip_add (char *ip_as_string)

int evdns_resolve_ipv4 (const char *name, int flags, SV *cb)
        C_ARGS: name, flags, dns_cb, (void *)SvREFCNT_inc (cb)

int evdns_resolve_ipv6 (const char *name, int flags, SV *cb)
        C_ARGS: name, flags, dns_cb, (void *)SvREFCNT_inc (cb)

int evdns_resolve_reverse (SV *addr, int flags, SV *cb)
        ALIAS:
        evdns_resolve_reverse_ipv6 = 1
        CODE:
{
        STRLEN len;
        char *data = SvPVbyte (addr, len);
        if (len != (ix ? 16 : 4))
          croak ("ipv4/ipv6 address to resolve must be given as 4/16 byte octet string");

        RETVAL = ix
          ? evdns_resolve_reverse_ipv6 ((struct in6_addr *)data, flags, dns_cb, (void *)SvREFCNT_inc (cb))
          : evdns_resolve_reverse      ((struct in_addr  *)data, flags, dns_cb, (void *)SvREFCNT_inc (cb));
}
        OUTPUT:
        RETVAL

int evdns_set_option (char *option, char *val, int flags)

int evdns_resolv_conf_parse (int flags, const char *filename)

#ifdef MS_WINDOWS

int evdns_config_windows_nameservers ()

#endif

void evdns_search_clear ()

void evdns_search_add (char *domain)

void evdns_search_ndots_set (int ndots)

Revision:	1.3
Committed:	Fri Oct 26 17:24:18 2007 UTC (16 years, 6 months ago) by root
Branch:	MAIN
Changes since 1.2:	+17 -16 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#include "EXTERN.h"
2			#include "perl.h"
3			#include "XSUB.h"
4
5			#include <math.h>
6			#include <netinet/in.h>
7
8			#include <sys/time.h>
9			#include <time.h>
10			#include <event.h>
11			#include <evdns.h>
12			/include <evhttp.h>/ /* does not compile */
13
14			#define EV_NONE 0
15			#define EV_UNDEF -1
16
17			#define TIMEOUT_NONE HUGE_VAL
18
19			typedef struct event_base *Base;
20
21			static HV stash_base, stash_event;
22
23			static double tv_get (struct timeval *tv)
24			{
25			return tv->tv_sec + tv->tv_usec * 1e-6;
26			}
27
28			static void tv_set (struct timeval *tv, double val)
29			{
30			tv->tv_sec = (long)val;
31			tv->tv_usec = (long)((val - (double)tv->tv_sec) * 1e6);
32
33			}
34
35			/////////////////////////////////////////////////////////////////////////////
36			// Event
37
38			typedef struct ev {
39			struct event ev;
40			SV cb, fh;
41			SV self; / contains this struct */
42			double timeout;
43			double interval;
44			unsigned char active;
45			unsigned char abstime;
46			} *Event;
47
48			static double
49			e_now ()
50			{
51			struct timeval tv;
52			gettimeofday (&tv, 0);
53
54			return tv_get (&tv);
55			}
56
57			static void e_cb (int fd, short events, void *arg);
58
59			static int sv_fileno (SV *fh)
60			{
61	root	1.3	SvGETMAGIC (fh);
62	root	1.1
63	root	1.3	if (SvROK (fh))
64			fh = SvRV (fh);
65	root	1.1
66	root	1.3	if (SvTYPE (fh) == SVt_PVGV)
67			return PerlIO_fileno (IoIFP (sv_2io (fh)));
68	root	1.1
69	root	1.3	if (SvIOK (fh))
70			return SvIV (fh);
71	root	1.1
72			return -1;
73			}
74
75			static Event
76			e_new (SV fh, short events, SV cb)
77			{
78			int fd = sv_fileno (fh);
79			Event ev;
80			SV *self = NEWSV (0, sizeof (struct ev));
81			SvPOK_only (self);
82			SvCUR_set (self, sizeof (struct ev));
83
84			ev = (Event)SvPVX (self);
85
86			ev->fh = newSVsv (fh);
87			ev->cb = newSVsv (cb);
88			ev->self = self;
89			ev->timeout = TIMEOUT_NONE;
90			ev->interval = 0.;
91			ev->abstime = 0;
92			ev->active = 0;
93
94			event_set (&ev->ev, fd, events, e_cb, (void *)ev);
95
96			return ev;
97			}
98
99			static struct timeval *
100			e_tv (Event ev)
101			{
102			static struct timeval tv;
103			double to = ev->timeout;
104
105			if (to == TIMEOUT_NONE)
106			return 0;
107
108			if (ev->abstime)
109			{
110			double now = e_now ();
111
112			if (now > to && ev->interval)
113			ev->timeout = (to += ceil ((now - to) / ev->interval) * ev->interval);
114
115			to -= now;
116			}
117			else if (to < 0.)
118			to = 0.;
119
120			tv_set (&tv, to);
121
122			return &tv;
123			}
124
125			static SV *e_self (Event ev)
126			{
127			SV *rv;
128
129			if (SvOBJECT (ev->self))
130			rv = newRV_inc (ev->self);
131			else
132			{
133			rv = newRV_noinc (ev->self);
134			sv_bless (rv, stash_event);
135			SvREADONLY_on (ev->self);
136			}
137
138			return rv;
139			}
140
141			static int
142			e_start (Event ev)
143			{
144			if (ev->active) event_del (&ev->ev);
145			ev->active = 1;
146			return event_add (&ev->ev, e_tv (ev));
147			}
148
149			static int e_stop (Event ev)
150			{
151			return ev->active
152			? (ev->active = 0), event_del (&ev->ev)
153			: 0;
154			}
155
156			static void
157			e_cb (int fd, short events, void *arg)
158			{
159			struct ev ev = (struct ev)arg;
160			dSP;
161
162			ENTER;
163			SAVETMPS;
164
165			if (!(ev->ev.ev_events & EV_PERSIST))
166			ev->active = 0;
167
168			PUSHMARK (SP);
169			EXTEND (SP, 2);
170			PUSHs (sv_2mortal (e_self (ev)));
171			PUSHs (sv_2mortal (newSViv (events)));
172			PUTBACK;
173			call_sv (ev->cb, G_DISCARD \| G_VOID \| G_EVAL);
174			/TODO: if err, call some logging function /
175
176			if (ev->interval && !ev->active)
177			e_start (ev);
178
179			FREETMPS;
180			LEAVE;
181			}
182
183			/////////////////////////////////////////////////////////////////////////////
184			// DNS
185
186			static void
187			dns_cb (int result, char type, int count, int ttl, void addresses, void arg)
188			{
189			dSP;
190			SV cb = (SV )arg;
191
192			ENTER;
193			SAVETMPS;
194			PUSHMARK (SP);
195			EXTEND (SP, count + 3);
196			PUSHs (sv_2mortal (newSViv (result)));
197
198			if (result == DNS_ERR_NONE && ttl >= 0)
199			{
200			int i;
201
202			PUSHs (sv_2mortal (newSViv (type)));
203			PUSHs (sv_2mortal (newSViv (ttl)));
204
205			for (i = 0; i < count; ++i)
206			switch (type)
207			{
208			case DNS_IPv6_AAAA:
209			PUSHs (sv_2mortal (newSVpvn (i * 16 + (char *)addresses, 16)));
210			break;
211			case DNS_IPv4_A:
212			PUSHs (sv_2mortal (newSVpvn (i * 4 + (char *)addresses, 4)));
213			break;
214			case DNS_PTR:
215			PUSHs (sv_2mortal (newSVpv ((char *)addresses, 0)));
216			break;
217			}
218			}
219
220			PUTBACK;
221			call_sv (sv_2mortal (cb), G_DISCARD \| G_VOID \| G_EVAL);
222
223			FREETMPS;
224			LEAVE;
225			}
226
227			/////////////////////////////////////////////////////////////////////////////
228			// XS interface functions
229
230			MODULE = EV PACKAGE = EV PREFIX = event_
231
232			BOOT:
233			{
234			HV *stash = gv_stashpv ("EV", 1);
235
236			static const struct {
237			const char *name;
238			IV iv;
239			} *civ, const_iv[] = {
240			# define const_iv(pfx, name) { # name, (IV) pfx ## name },
241			const_iv (EV_, NONE)
242			const_iv (EV_, TIMEOUT)
243			const_iv (EV_, READ)
244			const_iv (EV_, WRITE)
245			const_iv (EV_, SIGNAL)
246			const_iv (EV_, PERSIST)
247			const_iv (EV, LOOP_ONCE)
248			const_iv (EV, LOOP_NONBLOCK)
249			const_iv (EV, BUFFER_READ)
250			const_iv (EV, BUFFER_WRITE)
251			const_iv (EV, BUFFER_EOF)
252			const_iv (EV, BUFFER_ERROR)
253			const_iv (EV, BUFFER_TIMEOUT)
254			};
255
256			for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
257			newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
258
259			stash_base = gv_stashpv ("EV::Base" , 1);
260			stash_event = gv_stashpv ("EV::Event", 1);
261			}
262
263			double now ()
264			CODE:
265			RETVAL = e_now ();
266			OUTPUT:
267			RETVAL
268
269			const char *version ()
270			ALIAS:
271			method = 1
272			CODE:
273			RETVAL = ix ? event_get_method () : event_get_version ();
274			OUTPUT:
275			RETVAL
276
277			Base event_init ()
278
279			int event_priority_init (int npri)
280
281			int event_dispatch ()
282
283			int event_loop (int flags = 0)
284
285	root	1.3	int event_loopexit (double after = 0)
286	root	1.1	CODE:
287			{
288			struct timeval tv;
289			tv_set (&tv, after);
290			event_loopexit (&tv);
291			}
292
293			Event event (SV *cb)
294			CODE:
295	root	1.3	RETVAL = e_new (NEWSV (0, 0), 0, cb);
296	root	1.1	OUTPUT:
297			RETVAL
298
299			Event io (SV fh, short events, SV cb)
300			ALIAS:
301			io_ns = 1
302			CODE:
303			RETVAL = e_new (fh, events, cb);
304			if (!ix) e_start (RETVAL);
305			OUTPUT:
306			RETVAL
307
308			Event timer (double after, int repeat, SV *cb)
309			ALIAS:
310			timer_ns = 1
311			CODE:
312	root	1.3	RETVAL = e_new (NEWSV (0, 0), 0, cb);
313	root	1.1	RETVAL->timeout = after;
314			RETVAL->interval = repeat;
315			if (!ix) e_start (RETVAL);
316			OUTPUT:
317			RETVAL
318
319			Event timer_abs (double at, double interval, SV *cb)
320			ALIAS:
321			timer_abs_ns = 1
322			CODE:
323	root	1.3	RETVAL = e_new (NEWSV (0, 0), 0, cb);
324	root	1.1	RETVAL->timeout = at;
325			RETVAL->interval = interval;
326			RETVAL->abstime = 1;
327			if (!ix) e_start (RETVAL);
328			OUTPUT:
329			RETVAL
330
331			Event signal (SV signal, SV cb)
332			ALIAS:
333			signal_ns = 1
334			CODE:
335			RETVAL = e_new (signal, EV_SIGNAL \| EV_PERSIST, cb);
336			if (!ix) e_start (RETVAL);
337			OUTPUT:
338			RETVAL
339
340			PROTOTYPES: DISABLE
341
342
343			MODULE = EV PACKAGE = EV::Base PREFIX = event_base_
344
345			Base new ()
346			CODE:
347			RETVAL = event_init ();
348			OUTPUT:
349			RETVAL
350
351			int event_base_dispatch (Base base)
352
353			int event_base_loop (Base base, int flags = 0)
354
355			int event_base_loopexit (Base base, double after)
356			CODE:
357			{
358			struct timeval tv;
359			tv.tv_sec = (long)after;
360			tv.tv_usec = (long)(after - tv.tv_sec) * 1e6;
361			event_base_loopexit (base, &tv);
362			}
363
364			int event_base_priority_init (Base base, int npri)
365
366			void event_base_set (Base base, Event ev)
367			C_ARGS: base, &ev->ev
368
369			void DESTROY (Base base)
370			CODE:
371			/event_base_free (base);/ /* causes too many problems */
372
373
374			MODULE = EV PACKAGE = EV::Event PREFIX = event_
375
376			int event_priority_set (Event ev, int pri)
377			C_ARGS: &ev->ev, pri
378
379			int event_add (Event ev, double timeout = TIMEOUT_NONE)
380			CODE:
381			ev->timeout = timeout;
382			ev->abstime = 0;
383			RETVAL = e_start (ev);
384			OUTPUT:
385			RETVAL
386
387			int event_start (Event ev)
388			CODE:
389			RETVAL = e_start (ev);
390			OUTPUT:
391			RETVAL
392
393			int event_del (Event ev)
394			ALIAS:
395			stop = 0
396			CODE:
397			RETVAL = e_stop (ev);
398			OUTPUT:
399			RETVAL
400
401			void DESTROY (Event ev)
402			CODE:
403			e_stop (ev);
404			SvREFCNT_dec (ev->cb);
405			SvREFCNT_dec (ev->fh);
406
407	root	1.3	SV cb (Event ev, SV new_cb = 0)
408	root	1.1	CODE:
409	root	1.3	RETVAL = newSVsv (ev->cb);
410			if (items > 1)
411			sv_setsv (ev->cb, new_cb);
412			OUTPUT:
413			RETVAL
414	root	1.1
415			SV fh (Event ev, SV new_fh = 0)
416			ALIAS:
417			signal = 0
418			CODE:
419			RETVAL = newSVsv (ev->fh);
420			if (items > 1)
421			{
422			if (ev->active) event_del (&ev->ev);
423			sv_setsv (ev->fh, new_fh);
424	root	1.2	ev->ev.ev_fd = sv_fileno (ev->fh);
425	root	1.1	if (ev->active) event_add (&ev->ev, e_tv (ev));
426			}
427			OUTPUT:
428			RETVAL
429
430			short events (Event ev, short new_events = EV_UNDEF)
431			CODE:
432			RETVAL = ev->ev.ev_events;
433			if (items > 1)
434			{
435			if (ev->active) event_del (&ev->ev);
436			ev->ev.ev_events = new_events;
437			if (ev->active) event_add (&ev->ev, e_tv (ev));
438			}
439			OUTPUT:
440			RETVAL
441
442			double timeout (Event ev, double new_timeout = 0., int repeat = 0)
443			CODE:
444			RETVAL = ev->timeout;
445			if (items > 1)
446			{
447			if (ev->active) event_del (&ev->ev);
448			ev->timeout = new_timeout;
449			ev->interval = repeat;
450			ev->abstime = 0;
451			if (ev->active) event_add (&ev->ev, e_tv (ev));
452			}
453			OUTPUT:
454			RETVAL
455
456			void timeout_abs (Event ev, double at, double interval = 0.)
457			CODE:
458			if (ev->active) event_del (&ev->ev);
459			ev->timeout = at;
460			ev->interval = interval;
461			ev->abstime = 1;
462			if (ev->active) event_add (&ev->ev, e_tv (ev));
463
464
465			MODULE = EV PACKAGE = EV::DNS PREFIX = evdns_
466
467			BOOT:
468			{
469			HV *stash = gv_stashpv ("EV::DNS", 1);
470
471			static const struct {
472			const char *name;
473			IV iv;
474			} *civ, const_iv[] = {
475			# define const_iv(pfx, name) { # name, (IV) pfx ## name },
476
477			const_iv (DNS_, ERR_NONE)
478			const_iv (DNS_, ERR_FORMAT)
479			const_iv (DNS_, ERR_SERVERFAILED)
480			const_iv (DNS_, ERR_NOTEXIST)
481			const_iv (DNS_, ERR_NOTIMPL)
482			const_iv (DNS_, ERR_REFUSED)
483			const_iv (DNS_, ERR_TRUNCATED)
484			const_iv (DNS_, ERR_UNKNOWN)
485			const_iv (DNS_, ERR_TIMEOUT)
486			const_iv (DNS_, ERR_SHUTDOWN)
487			const_iv (DNS_, IPv4_A)
488			const_iv (DNS_, PTR)
489			const_iv (DNS_, IPv6_AAAA)
490			const_iv (DNS_, QUERY_NO_SEARCH)
491			const_iv (DNS_, OPTION_SEARCH)
492			const_iv (DNS_, OPTION_NAMESERVERS)
493			const_iv (DNS_, OPTION_MISC)
494			const_iv (DNS_, OPTIONS_ALL)
495			const_iv (DNS_, NO_SEARCH)
496			};
497
498			for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
499			newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
500			}
501
502			int evdns_init ()
503
504			void evdns_shutdown (int fail_requests = 1)
505
506			const char *evdns_err_to_string (int err)
507
508			int evdns_nameserver_add (U32 address)
509
510			int evdns_count_nameservers ()
511
512			int evdns_clear_nameservers_and_suspend ()
513
514			int evdns_resume ()
515
516			int evdns_nameserver_ip_add (char *ip_as_string)
517
518			int evdns_resolve_ipv4 (const char name, int flags, SV cb)
519			C_ARGS: name, flags, dns_cb, (void *)SvREFCNT_inc (cb)
520
521			int evdns_resolve_ipv6 (const char name, int flags, SV cb)
522			C_ARGS: name, flags, dns_cb, (void *)SvREFCNT_inc (cb)
523
524			int evdns_resolve_reverse (SV addr, int flags, SV cb)
525			ALIAS:
526			evdns_resolve_reverse_ipv6 = 1
527			CODE:
528			{
529			STRLEN len;
530			char *data = SvPVbyte (addr, len);
531			if (len != (ix ? 16 : 4))
532			croak ("ipv4/ipv6 address to resolve must be given as 4/16 byte octet string");
533
534			RETVAL = ix
535			? evdns_resolve_reverse_ipv6 ((struct in6_addr )data, flags, dns_cb, (void )SvREFCNT_inc (cb))
536			: evdns_resolve_reverse ((struct in_addr )data, flags, dns_cb, (void )SvREFCNT_inc (cb));
537			}
538			OUTPUT:
539			RETVAL
540
541			int evdns_set_option (char option, char val, int flags)
542
543			int evdns_resolv_conf_parse (int flags, const char *filename)
544
545			#ifdef MS_WINDOWS
546
547			int evdns_config_windows_nameservers ()
548
549			#endif
550
551			void evdns_search_clear ()
552
553			void evdns_search_add (char *domain)
554
555			void evdns_search_ndots_set (int ndots)
556