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);

  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;

  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");

  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);

        CORO_READYHOOK = 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_loop (EV_DEFAULT_UC, EVLOOP_ONESHOT);

        --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
_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:	1.24
Committed:	Mon Jun 22 11:25:53 2009 UTC (14 years, 11 months ago) by root
Branch:	MAIN
CVS Tags:	rel-5_14
Changes since 1.23:	+7 -5 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			data = sv_2mortal (newRV_inc (CORO_CURRENT));
104			frame->data = (void *)data;
105			frame->prepare = GCoroAPI->prepare_schedule;
106			frame->check = slf_check_once;
107
108			ev_once (
109			EV_DEFAULT_UC,
110			sv_fileno (arg [0]),
111			SvIV (arg [1]),
112			items >= 3 && SvOK (arg [2]) ? SvNV (arg [2]) : -1.,
113			once_cb,
114	root	1.22	SvREFCNT_inc (data)
115	root	1.18	);
116			}
117
118			static void
119	root	1.21	slf_init_timer (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
120	root	1.18	{
121			SV *data;
122			NV after;
123
124	root	1.24	if (items > 1)
125			croak ("Coro::EV::timer_once requires at most one parameter, not %d.\n", items);
126	root	1.18
127			data = sv_2mortal (newRV_inc (CORO_CURRENT));
128	root	1.19	frame->data = (void *)data;
129			frame->prepare = GCoroAPI->prepare_schedule;
130			frame->check = slf_check_once;
131	root	1.18
132	root	1.24	after = items ? SvNV (arg [0]) : 0;
133	root	1.18
134			ev_once (
135			EV_DEFAULT_UC,
136			-1,
137			0,
138			after >= 0. ? after : 0.,
139			once_cb,
140	root	1.22	SvREFCNT_inc (data)
141	root	1.18	);
142			}
143
144			/*****************************************************************************/
145
146	root	1.10	typedef struct
147			{
148			ev_io io;
149			ev_timer tw;
150	root	1.18	SV *data;
151	root	1.10	} coro_dir;
152
153			typedef struct
154			{
155			coro_dir r, w;
156			} coro_handle;
157
158			static int
159			handle_free (pTHX_ SV sv, MAGIC mg)
160			{
161			coro_handle data = (coro_handle )mg->mg_ptr;
162			mg->mg_ptr = 0;
163
164	root	1.15	ev_io_stop (EV_DEFAULT_UC, &data->r.io); ev_io_stop (EV_DEFAULT_UC, &data->w.io);
165			ev_timer_stop (EV_DEFAULT_UC, &data->r.tw); ev_timer_stop (EV_DEFAULT_UC, &data->w.tw);
166	root	1.10
167			return 0;
168			}
169
170			static MGVTBL handle_vtbl = { 0, 0, 0, 0, handle_free };
171
172			static void
173	root	1.18	handle_cb (coro_dir *dir, int success)
174	root	1.10	{
175	root	1.15	ev_io_stop (EV_DEFAULT_UC, &dir->io);
176			ev_timer_stop (EV_DEFAULT_UC, &dir->tw);
177	root	1.10
178	root	1.18	CORO_READY (dir->data);
179			sv_setiv (dir->data, success);
180	root	1.10	}
181
182			static void
183			handle_io_cb (EV_P_ ev_io *w, int revents)
184			{
185			handle_cb ((coro_dir )(((char )w) - offsetof (coro_dir, io)), 1);
186			}
187
188			static void
189			handle_timer_cb (EV_P_ ev_timer *w, int revents)
190			{
191			handle_cb ((coro_dir )(((char )w) - offsetof (coro_dir, tw)), 0);
192			}
193
194	root	1.18	static int
195			slf_check_rw (pTHX_ struct CoroSLF *frame)
196			{
197			SV data = (SV )frame->data;
198
199			if (SvROK (data))
200			return 1;
201			else
202			{
203			dSP;
204
205			XPUSHs (data);
206
207			PUTBACK;
208			return 0;
209			}
210			}
211
212			static void
213	root	1.20	slf_init_rw (pTHX_ struct CoroSLF frame, SV arg, int wr)
214	root	1.18	{
215			AV handle = (AV )SvRV (arg);
216			SV *data_sv = AvARRAY (handle)[5];
217			coro_handle *data;
218			coro_dir *dir;
219			assert (AvFILLp (handle) >= 7);
220
221			if (!SvOK (data_sv))
222			{
223			int fno = sv_fileno (AvARRAY (handle)[0]);
224			data_sv = AvARRAY (handle)[5] = NEWSV (0, sizeof (coro_handle));
225			SvPOK_only (data_sv);
226			SvREADONLY_on (data_sv);
227			data = (coro_handle *)SvPVX (data_sv);
228			memset (data, 0, sizeof (coro_handle));
229
230			ev_io_init (&data->r.io, handle_io_cb, fno, EV_READ);
231			ev_io_init (&data->w.io, handle_io_cb, fno, EV_WRITE);
232			ev_init (&data->r.tw, handle_timer_cb);
233			ev_init (&data->w.tw, handle_timer_cb);
234
235			sv_magicext (data_sv, 0, PERL_MAGIC_ext, &handle_vtbl, (char *)data, 0);
236			}
237			else
238			data = (coro_handle *)SvPVX (data_sv);
239
240			dir = wr ? &data->w : &data->r;
241
242			if (ev_is_active (&dir->io) \|\| ev_is_active (&dir->tw))
243			croak ("recursive invocation of readable_ev or writable_ev");
244
245			dir->data = sv_2mortal (newRV_inc (CORO_CURRENT));
246
247			{
248			SV *to = AvARRAY (handle)[2];
249
250			if (SvOK (to))
251			{
252			ev_timer_set (&dir->tw, 0., SvNV (to));
253			ev_timer_again (EV_DEFAULT_UC, &dir->tw);
254			}
255			}
256
257			ev_io_start (EV_DEFAULT_UC, &dir->io);
258
259			frame->data = (void *)dir->data;
260			frame->prepare = GCoroAPI->prepare_schedule;
261			frame->check = slf_check_rw;
262			}
263
264			static void
265	root	1.21	slf_init_readable (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
266	root	1.18	{
267			slf_init_rw (aTHX_ frame, arg [0], 0);
268			}
269
270			static void
271	root	1.21	slf_init_writable (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
272	root	1.18	{
273			slf_init_rw (aTHX_ frame, arg [0], 1);
274			}
275
276	root	1.10	/*****************************************************************************/
277
278	root	1.1	MODULE = Coro::EV PACKAGE = Coro::EV
279
280			PROTOTYPES: ENABLE
281
282			BOOT:
283			{
284	root	1.23	I_EV_API ("Coro::EV");
285			I_CORO_API ("Coro::EV");
286	root	1.2
287	root	1.17	EV_DEFAULT; /* make sure it is initialised */
288
289	root	1.3	ev_prepare_init (&scheduler, prepare_cb);
290	root	1.10	ev_set_priority (&scheduler, EV_MINPRI);
291	root	1.17	ev_prepare_start (EV_DEFAULT_UC, &scheduler);
292			ev_unref (EV_DEFAULT_UC);
293	root	1.2
294	root	1.3	ev_idle_init (&idler, idle_cb);
295	root	1.10	ev_set_priority (&idler, EV_MINPRI);
296	root	1.15
297			CORO_READYHOOK = readyhook;
298	root	1.1	}
299
300			void
301	root	1.9	_loop_oneshot ()
302			CODE:
303	root	1.17	{
304			/* inhibit the prepare watcher, as we know we are the only
305			* ready coroutine and we don't want it to start an idle watcher
306			* just because of the fallback idle coro being of lower priority.
307			*/
308	root	1.9	++inhibit;
309	root	1.17
310			/* same reasoning as above, make sure it is stopped */
311			if (ev_is_active (&idler))
312			ev_idle_stop (EV_DEFAULT_UC, &idler);
313
314			ev_loop (EV_DEFAULT_UC, EVLOOP_ONESHOT);
315
316	root	1.9	--inhibit;
317	root	1.17	}
318	root	1.9
319			void
320	root	1.18	timed_io_once (...)
321	root	1.24	PROTOTYPE: $$;$
322	root	1.1	CODE:
323	root	1.18	CORO_EXECUTE_SLF_XS (slf_init_timed_io);
324	root	1.1
325			void
326	root	1.18	timer_once (...)
327	root	1.24	PROTOTYPE: $
328	root	1.1	CODE:
329	root	1.18	CORO_EXECUTE_SLF_XS (slf_init_timer);
330	root	1.1
331	root	1.10	void
332	root	1.24	_readable_ev (...)
333	root	1.10	CODE:
334	root	1.23	items = 1; /* ignore the remaining args for speed inside Coro::Handle */
335	root	1.18	CORO_EXECUTE_SLF_XS (slf_init_readable);
336	root	1.1
337	root	1.18	void
338	root	1.24	_writable_ev (...)
339	root	1.18	CODE:
340	root	1.23	items = 1; /* ignore the remaining args for speed inside Coro::Handle */
341	root	1.18	CORO_EXECUTE_SLF_XS (slf_init_writable);
342	root	1.1