Coro/EV/EV.xs

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

#include <stddef.h>
#include <assert.h>
#include <string.h>

#include "EVAPI.h"
#include "../Coro/CoroAPI.h"

static struct ev_prepare scheduler;
static struct ev_idle idler;
static int inhibit;

static void
idle_cb (EV_P_ ev_idle *w, int revents)
{
  ev_idle_stop (EV_A, w);
}

static void
prepare_cb (EV_P_ ev_prepare *w, int revents)
{
  static int incede;

  if (inhibit)
    return;

  ++incede;

  CORO_CEDE_NOTSELF;

  while (CORO_NREADY >= incede && CORO_CEDE)
    ;

  /* if still ready, then we have lower-priority coroutines.
   * poll anyways, but do not block.
   */
  if (CORO_NREADY >= incede)
    {
      if (!ev_is_active (&idler))
        ev_idle_start (EV_A, &idler);
    }
  else
    {
      if (ev_is_active (&idler))
        ev_idle_stop (EV_A, &idler);
    }

  --incede;
}

static void
readyhook (void)
{
  if (!ev_is_active (&idler))
    ev_idle_start (EV_DEFAULT_UC, &idler);
}

/*****************************************************************************/

static void
once_cb (int revents, void *arg)
{
  SV *data = (SV *)arg;

  CORO_READY (data);
  sv_setiv (data, revents);
  SvREFCNT_dec (data);
}

static int
slf_check_once (pTHX_ struct CoroSLF *frame)
{
  SV *data = (SV *)frame->data;

  /* return early when an exception is pending */
  if (CORO_THROW)
    return 0;

  if (SvROK (data))
    return 1; /* repeat until we have been signalled */
  else
    {
      dSP;

      XPUSHs (data);

      PUTBACK;
      return 0;
    }
}

static void
slf_init_timed_io (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
  SV *data;

  if (items < 2 || items > 3)
    croak ("Coro::EV::timed_io_once requires exactly two or three parameters, not %d.\n", items);

  SvGETMAGIC (arg [0]);
  SvGETMAGIC (arg [1]);

  if (items >= 3)
    SvGETMAGIC (arg [2]);

  data = sv_2mortal (newRV_inc (CORO_CURRENT));
  frame->data    = (void *)data;
  frame->prepare = GCoroAPI->prepare_schedule;
  frame->check   = slf_check_once;

  ev_once (
    EV_DEFAULT_UC,
    sv_fileno (arg [0]),
    SvIV (arg [1]),
    items >= 3 && SvOK (arg [2]) ? SvNV (arg [2]) : -1.,
    once_cb,
    SvREFCNT_inc (data)
  );
}

static void
slf_init_timer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
  SV *data;
  NV after;

  if (items > 1)
    croak ("Coro::EV::timer_once requires at most one parameter, not %d.\n", items);

  data = sv_2mortal (newRV_inc (CORO_CURRENT));
  frame->data    = (void *)data;
  frame->prepare = GCoroAPI->prepare_schedule;
  frame->check   = slf_check_once;

  after = items ? SvNV (arg [0]) : 0;

  ev_once (
    EV_DEFAULT_UC,
    -1,
    0,
    after >= 0. ? after : 0.,
    once_cb,
    SvREFCNT_inc (data)
  );
}

/*****************************************************************************/

typedef struct
{
  ev_io io;
  ev_timer tw;
  SV *data;
} coro_dir;

typedef struct
{
  coro_dir r, w;
} coro_handle;

static int
handle_free (pTHX_ SV *sv, MAGIC *mg)
{
  coro_handle *data = (coro_handle *)mg->mg_ptr;
  mg->mg_ptr = 0;

  ev_io_stop    (EV_DEFAULT_UC, &data->r.io); ev_io_stop    (EV_DEFAULT_UC, &data->w.io);
  ev_timer_stop (EV_DEFAULT_UC, &data->r.tw); ev_timer_stop (EV_DEFAULT_UC, &data->w.tw);

  return 0;
}

static MGVTBL handle_vtbl = { 0,  0,  0,  0, handle_free };

static void
handle_cb (coro_dir *dir, int success)
{
  ev_io_stop    (EV_DEFAULT_UC, &dir->io);
  ev_timer_stop (EV_DEFAULT_UC, &dir->tw);

  CORO_READY (dir->data);
  sv_setiv (dir->data, success);
}

static void
handle_io_cb (EV_P_ ev_io *w, int revents)
{
  handle_cb ((coro_dir *)(((char *)w) - offsetof (coro_dir, io)), 1);
}

static void
handle_timer_cb (EV_P_ ev_timer *w, int revents)
{
  handle_cb ((coro_dir *)(((char *)w) - offsetof (coro_dir, tw)), 0);
}

static int
slf_check_rw (pTHX_ struct CoroSLF *frame)
{
  SV *data = (SV *)frame->data;

  /* return early when an exception is pending */
  if (CORO_THROW)
    return 0;

  if (SvROK (data))
    return 1;
  else
    {
      dSP;

      XPUSHs (data);

      PUTBACK;
      return 0;
    }
}

static void
slf_init_rw (pTHX_ struct CoroSLF *frame, SV *arg, int wr)
{
  AV *handle = (AV *)SvRV (arg);
  SV *data_sv = AvARRAY (handle)[5];
  coro_handle *data;
  coro_dir *dir;
  assert (AvFILLp (handle) >= 7);

  if (!SvOK (data_sv))
    {
      int fno = sv_fileno (AvARRAY (handle)[0]);
      data_sv = AvARRAY (handle)[5] = NEWSV (0, sizeof (coro_handle));
      SvPOK_only (data_sv);
      SvREADONLY_on (data_sv);
      data = (coro_handle *)SvPVX (data_sv);
      memset (data, 0, sizeof (coro_handle));

      ev_io_init (&data->r.io, handle_io_cb, fno, EV_READ);
      ev_io_init (&data->w.io, handle_io_cb, fno, EV_WRITE);
      ev_init    (&data->r.tw, handle_timer_cb);
      ev_init    (&data->w.tw, handle_timer_cb);

      sv_magicext (data_sv, 0, PERL_MAGIC_ext, &handle_vtbl, (char *)data, 0);
    }
  else
    data = (coro_handle *)SvPVX (data_sv);

  dir = wr ? &data->w : &data->r;

  if (ev_is_active (&dir->io) || ev_is_active (&dir->tw))
    croak ("recursive invocation of readable_ev or writable_ev (concurrent Coro::Handle calls on same handle?), detected");

  dir->data = sv_2mortal (newRV_inc (CORO_CURRENT));

  {
    SV *to = AvARRAY (handle)[2];

    if (SvOK (to))
      {
        ev_timer_set (&dir->tw, 0., SvNV (to));
        ev_timer_again (EV_DEFAULT_UC, &dir->tw);
      }
  }

  ev_io_start (EV_DEFAULT_UC, &dir->io);

  frame->data    = (void *)dir->data;
  frame->prepare = GCoroAPI->prepare_schedule;
  frame->check   = slf_check_rw;
}

static void
slf_init_readable (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
  slf_init_rw (aTHX_ frame, arg [0], 0);
}

static void
slf_init_writable (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
  slf_init_rw (aTHX_ frame, arg [0], 1);
}

/*****************************************************************************/

MODULE = Coro::EV                PACKAGE = Coro::EV

PROTOTYPES: ENABLE

BOOT:
{
        I_EV_API   ("Coro::EV");
        I_CORO_API ("Coro::EV");

        EV_DEFAULT; /* make sure it is initialised */

        ev_prepare_init (&scheduler, prepare_cb);
        ev_set_priority (&scheduler, EV_MINPRI);
        ev_prepare_start (EV_DEFAULT_UC, &scheduler);
        ev_unref (EV_DEFAULT_UC);

        ev_idle_init (&idler, idle_cb);
        ev_set_priority (&idler, EV_MINPRI);

        if (!CORO_READYHOOK) /* do not override if Coro::AnyEvent already did */
          {
            CORO_READYHOOK = readyhook;
            CORO_READYHOOK (); /* make sure we don't miss previous ready's */
          }
}

void
_set_readyhook ()
        CODE:
        CORO_READYHOOK = readyhook;
        CORO_READYHOOK ();

void
_loop_oneshot ()
        CODE:
{
        /* inhibit the prepare watcher, as we know we are the only
         * ready coroutine and we don't want it to start an idle watcher
         * just because of the fallback idle coro being of lower priority.
         */
        ++inhibit;

        /* same reasoning as above, make sure it is stopped */
        if (ev_is_active (&idler))
          ev_idle_stop (EV_DEFAULT_UC, &idler);
        ev_run (EV_DEFAULT_UC, EVRUN_ONCE);
        --inhibit;
}

void
timed_io_once (...)
        PROTOTYPE: $$;$
        CODE:
        CORO_EXECUTE_SLF_XS (slf_init_timed_io);

void
timer_once (...)
        PROTOTYPE: $
        CODE:
        CORO_EXECUTE_SLF_XS (slf_init_timer);

void
_poll (...)
        PROTOTYPE:
        CODE:
        CORO_EXECUTE_SLF_XS (slf_init_timer);

PROTOTYPES: DISABLE

void
_readable_ev (...)
        CODE:
        items = 1; /* ignore the remaining args for speed inside Coro::Handle */
        CORO_EXECUTE_SLF_XS (slf_init_readable);

void
_writable_ev (...)
        CODE:
        items = 1; /* ignore the remaining args for speed inside Coro::Handle */
        CORO_EXECUTE_SLF_XS (slf_init_writable);

Revision:	1.36
Committed:	Wed Oct 31 16:35:30 2012 UTC (11 years, 7 months ago) by root
Branch:	MAIN
Changes since 1.35:	+6 -3 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	root	1.10	#include <stddef.h>
6	root	1.1	#include <assert.h>
7			#include <string.h>
8
9			#include "EVAPI.h"
10			#include "../Coro/CoroAPI.h"
11
12	root	1.2	static struct ev_prepare scheduler;
13			static struct ev_idle idler;
14	root	1.9	static int inhibit;
15	root	1.2
16			static void
17	root	1.10	idle_cb (EV_P_ ev_idle *w, int revents)
18	root	1.2	{
19	root	1.12	ev_idle_stop (EV_A, w);
20	root	1.2	}
21
22			static void
23	root	1.10	prepare_cb (EV_P_ ev_prepare *w, int revents)
24	root	1.2	{
25	root	1.5	static int incede;
26
27	root	1.9	if (inhibit)
28			return;
29
30	root	1.5	++incede;
31
32			CORO_CEDE_NOTSELF;
33
34	root	1.6	while (CORO_NREADY >= incede && CORO_CEDE)
35	root	1.2	;
36
37			/* if still ready, then we have lower-priority coroutines.
38	root	1.5	* poll anyways, but do not block.
39	root	1.2	*/
40	root	1.16	if (CORO_NREADY >= incede)
41			{
42			if (!ev_is_active (&idler))
43			ev_idle_start (EV_A, &idler);
44			}
45			else
46			{
47			if (ev_is_active (&idler))
48			ev_idle_stop (EV_A, &idler);
49			}
50	root	1.5
51			--incede;
52	root	1.2	}
53
54	root	1.15	static void
55			readyhook (void)
56			{
57	root	1.17	if (!ev_is_active (&idler))
58			ev_idle_start (EV_DEFAULT_UC, &idler);
59	root	1.15	}
60
61	root	1.10	/*****************************************************************************/
62
63	root	1.18	static void
64			once_cb (int revents, void *arg)
65			{
66			SV data = (SV )arg;
67
68			CORO_READY (data);
69			sv_setiv (data, revents);
70	root	1.22	SvREFCNT_dec (data);
71	root	1.18	}
72
73			static int
74			slf_check_once (pTHX_ struct CoroSLF *frame)
75			{
76			SV data = (SV )frame->data;
77
78	root	1.22	/* return early when an exception is pending */
79			if (CORO_THROW)
80			return 0;
81
82	root	1.18	if (SvROK (data))
83			return 1; /* repeat until we have been signalled */
84			else
85			{
86			dSP;
87
88			XPUSHs (data);
89
90			PUTBACK;
91			return 0;
92			}
93			}
94
95			static void
96	root	1.21	slf_init_timed_io (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
97	root	1.18	{
98			SV *data;
99
100			if (items < 2 \|\| items > 3)
101			croak ("Coro::EV::timed_io_once requires exactly two or three parameters, not %d.\n", items);
102
103	root	1.36	SvGETMAGIC (arg [0]);
104			SvGETMAGIC (arg [1]);
105
106			if (items >= 3)
107			SvGETMAGIC (arg [2]);
108
109	root	1.18	data = sv_2mortal (newRV_inc (CORO_CURRENT));
110			frame->data = (void *)data;
111			frame->prepare = GCoroAPI->prepare_schedule;
112			frame->check = slf_check_once;
113
114			ev_once (
115			EV_DEFAULT_UC,
116			sv_fileno (arg [0]),
117			SvIV (arg [1]),
118			items >= 3 && SvOK (arg [2]) ? SvNV (arg [2]) : -1.,
119			once_cb,
120	root	1.22	SvREFCNT_inc (data)
121	root	1.18	);
122			}
123
124			static void
125	root	1.21	slf_init_timer (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
126	root	1.18	{
127			SV *data;
128			NV after;
129
130	root	1.24	if (items > 1)
131			croak ("Coro::EV::timer_once requires at most one parameter, not %d.\n", items);
132	root	1.18
133			data = sv_2mortal (newRV_inc (CORO_CURRENT));
134	root	1.19	frame->data = (void *)data;
135			frame->prepare = GCoroAPI->prepare_schedule;
136			frame->check = slf_check_once;
137	root	1.18
138	root	1.24	after = items ? SvNV (arg [0]) : 0;
139	root	1.18
140			ev_once (
141			EV_DEFAULT_UC,
142			-1,
143			0,
144			after >= 0. ? after : 0.,
145			once_cb,
146	root	1.22	SvREFCNT_inc (data)
147	root	1.18	);
148			}
149
150			/*****************************************************************************/
151
152	root	1.10	typedef struct
153			{
154			ev_io io;
155			ev_timer tw;
156	root	1.18	SV *data;
157	root	1.10	} coro_dir;
158
159			typedef struct
160			{
161			coro_dir r, w;
162			} coro_handle;
163
164			static int
165			handle_free (pTHX_ SV sv, MAGIC mg)
166			{
167			coro_handle data = (coro_handle )mg->mg_ptr;
168			mg->mg_ptr = 0;
169
170	root	1.15	ev_io_stop (EV_DEFAULT_UC, &data->r.io); ev_io_stop (EV_DEFAULT_UC, &data->w.io);
171			ev_timer_stop (EV_DEFAULT_UC, &data->r.tw); ev_timer_stop (EV_DEFAULT_UC, &data->w.tw);
172	root	1.10
173			return 0;
174			}
175
176			static MGVTBL handle_vtbl = { 0, 0, 0, 0, handle_free };
177
178			static void
179	root	1.18	handle_cb (coro_dir *dir, int success)
180	root	1.10	{
181	root	1.15	ev_io_stop (EV_DEFAULT_UC, &dir->io);
182			ev_timer_stop (EV_DEFAULT_UC, &dir->tw);
183	root	1.10
184	root	1.18	CORO_READY (dir->data);
185			sv_setiv (dir->data, success);
186	root	1.10	}
187
188			static void
189			handle_io_cb (EV_P_ ev_io *w, int revents)
190			{
191			handle_cb ((coro_dir )(((char )w) - offsetof (coro_dir, io)), 1);
192			}
193
194			static void
195			handle_timer_cb (EV_P_ ev_timer *w, int revents)
196			{
197			handle_cb ((coro_dir )(((char )w) - offsetof (coro_dir, tw)), 0);
198			}
199
200	root	1.18	static int
201			slf_check_rw (pTHX_ struct CoroSLF *frame)
202			{
203			SV data = (SV )frame->data;
204
205	root	1.34	/* return early when an exception is pending */
206			if (CORO_THROW)
207			return 0;
208
209	root	1.18	if (SvROK (data))
210			return 1;
211			else
212			{
213			dSP;
214
215			XPUSHs (data);
216
217			PUTBACK;
218			return 0;
219			}
220			}
221
222			static void
223	root	1.20	slf_init_rw (pTHX_ struct CoroSLF frame, SV arg, int wr)
224	root	1.18	{
225			AV handle = (AV )SvRV (arg);
226			SV *data_sv = AvARRAY (handle)[5];
227			coro_handle *data;
228			coro_dir *dir;
229			assert (AvFILLp (handle) >= 7);
230
231			if (!SvOK (data_sv))
232			{
233			int fno = sv_fileno (AvARRAY (handle)[0]);
234			data_sv = AvARRAY (handle)[5] = NEWSV (0, sizeof (coro_handle));
235			SvPOK_only (data_sv);
236			SvREADONLY_on (data_sv);
237			data = (coro_handle *)SvPVX (data_sv);
238			memset (data, 0, sizeof (coro_handle));
239
240			ev_io_init (&data->r.io, handle_io_cb, fno, EV_READ);
241			ev_io_init (&data->w.io, handle_io_cb, fno, EV_WRITE);
242			ev_init (&data->r.tw, handle_timer_cb);
243			ev_init (&data->w.tw, handle_timer_cb);
244
245			sv_magicext (data_sv, 0, PERL_MAGIC_ext, &handle_vtbl, (char *)data, 0);
246			}
247			else
248			data = (coro_handle *)SvPVX (data_sv);
249
250			dir = wr ? &data->w : &data->r;
251
252			if (ev_is_active (&dir->io) \|\| ev_is_active (&dir->tw))
253	root	1.33	croak ("recursive invocation of readable_ev or writable_ev (concurrent Coro::Handle calls on same handle?), detected");
254	root	1.18
255			dir->data = sv_2mortal (newRV_inc (CORO_CURRENT));
256
257			{
258			SV *to = AvARRAY (handle)[2];
259
260			if (SvOK (to))
261			{
262			ev_timer_set (&dir->tw, 0., SvNV (to));
263			ev_timer_again (EV_DEFAULT_UC, &dir->tw);
264			}
265			}
266
267			ev_io_start (EV_DEFAULT_UC, &dir->io);
268
269			frame->data = (void *)dir->data;
270			frame->prepare = GCoroAPI->prepare_schedule;
271			frame->check = slf_check_rw;
272			}
273
274			static void
275	root	1.21	slf_init_readable (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
276	root	1.18	{
277			slf_init_rw (aTHX_ frame, arg [0], 0);
278			}
279
280			static void
281	root	1.21	slf_init_writable (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
282	root	1.18	{
283			slf_init_rw (aTHX_ frame, arg [0], 1);
284			}
285
286	root	1.10	/*****************************************************************************/
287
288	root	1.1	MODULE = Coro::EV PACKAGE = Coro::EV
289
290			PROTOTYPES: ENABLE
291
292			BOOT:
293			{
294	root	1.23	I_EV_API ("Coro::EV");
295			I_CORO_API ("Coro::EV");
296	root	1.2
297	root	1.17	EV_DEFAULT; /* make sure it is initialised */
298
299	root	1.3	ev_prepare_init (&scheduler, prepare_cb);
300	root	1.10	ev_set_priority (&scheduler, EV_MINPRI);
301	root	1.17	ev_prepare_start (EV_DEFAULT_UC, &scheduler);
302			ev_unref (EV_DEFAULT_UC);
303	root	1.2
304	root	1.3	ev_idle_init (&idler, idle_cb);
305	root	1.10	ev_set_priority (&idler, EV_MINPRI);
306	root	1.15
307	root	1.29	if (!CORO_READYHOOK) /* do not override if Coro::AnyEvent already did */
308			{
309			CORO_READYHOOK = readyhook;
310			CORO_READYHOOK (); /* make sure we don't miss previous ready's */
311			}
312			}
313
314			void
315			_set_readyhook ()
316			CODE:
317	root	1.15	CORO_READYHOOK = readyhook;
318	root	1.29	CORO_READYHOOK ();
319	root	1.1
320			void
321	root	1.9	_loop_oneshot ()
322			CODE:
323	root	1.17	{
324			/* inhibit the prepare watcher, as we know we are the only
325			* ready coroutine and we don't want it to start an idle watcher
326			* just because of the fallback idle coro being of lower priority.
327			*/
328	root	1.9	++inhibit;
329	root	1.17
330			/* same reasoning as above, make sure it is stopped */
331			if (ev_is_active (&idler))
332			ev_idle_stop (EV_DEFAULT_UC, &idler);
333	root	1.30	ev_run (EV_DEFAULT_UC, EVRUN_ONCE);
334	root	1.9	--inhibit;
335	root	1.17	}
336	root	1.9
337			void
338	root	1.18	timed_io_once (...)
339	root	1.24	PROTOTYPE: $$;$
340	root	1.1	CODE:
341	root	1.18	CORO_EXECUTE_SLF_XS (slf_init_timed_io);
342	root	1.1
343			void
344	root	1.18	timer_once (...)
345	root	1.24	PROTOTYPE: $
346	root	1.1	CODE:
347	root	1.18	CORO_EXECUTE_SLF_XS (slf_init_timer);
348	root	1.1
349	root	1.10	void
350	root	1.27	_poll (...)
351			PROTOTYPE:
352			CODE:
353			CORO_EXECUTE_SLF_XS (slf_init_timer);
354
355	root	1.28	PROTOTYPES: DISABLE
356
357	root	1.27	void
358	root	1.24	_readable_ev (...)
359	root	1.10	CODE:
360	root	1.23	items = 1; /* ignore the remaining args for speed inside Coro::Handle */
361	root	1.18	CORO_EXECUTE_SLF_XS (slf_init_readable);
362	root	1.1
363	root	1.18	void
364	root	1.24	_writable_ev (...)
365	root	1.18	CODE:
366	root	1.23	items = 1; /* ignore the remaining args for speed inside Coro::Handle */
367	root	1.18	CORO_EXECUTE_SLF_XS (slf_init_writable);
368	root	1.1