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);
}

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

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

      XPUSHs (data);

      PUTBACK;
      return 0;
    }
}

static void
slf_init_timed_io (aTHX_ struct CoroSLF *frame, 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,
    data
  );
}

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

  if (items != 1)
    croak ("Coro::EV::timer_once requires exactly one parameter, not %d.\n", items);

  data = sv_2mortal (newRV_inc (CORO_CURRENT));
  frame->data = (void *)data;

  after = SvNV (arg [0]);

  ev_once (
    EV_DEFAULT_UC,
    -1,
    0,
    after >= 0. ? after : 0.,
    once_cb,
    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 (aTHX_ 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 (aTHX_ struct CoroSLF *frame, SV **arg, int items)
{
  slf_init_rw (aTHX_ frame, arg [0], 0);
}

static void
slf_init_writable (aTHX_ struct CoroSLF *frame, 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::Event");

        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 (...)
        CODE:
        CORO_EXECUTE_SLF_XS (slf_init_timed_io);

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

void
readable_ev (...)
        CODE:
        CORO_EXECUTE_SLF_XS (slf_init_readable);

void
writable_ev (...)
        CODE:
        CORO_EXECUTE_SLF_XS (slf_init_writable);

Revision:	1.18
Committed:	Fri Nov 14 23:48:10 2008 UTC (15 years, 6 months ago) by root
Branch:	MAIN
Changes since 1.17:	+172 -101 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			}
71
72			static int
73			slf_check_once (pTHX_ struct CoroSLF *frame)
74			{
75			SV data = (SV )frame->data;
76
77			if (SvROK (data))
78			return 1; /* repeat until we have been signalled */
79			else
80			{
81			dSP;
82
83			XPUSHs (data);
84
85			PUTBACK;
86			return 0;
87			}
88			}
89
90			static void
91			slf_init_timed_io (aTHX_ struct CoroSLF frame, SV *arg, int items)
92			{
93			SV *data;
94
95			if (items < 2 \|\| items > 3)
96			croak ("Coro::EV::timed_io_once requires exactly two or three parameters, not %d.\n", items);
97
98			data = sv_2mortal (newRV_inc (CORO_CURRENT));
99			frame->data = (void *)data;
100			frame->prepare = GCoroAPI->prepare_schedule;
101			frame->check = slf_check_once;
102
103			ev_once (
104			EV_DEFAULT_UC,
105			sv_fileno (arg [0]),
106			SvIV (arg [1]),
107			items >= 3 && SvOK (arg [2]) ? SvNV (arg [2]) : -1.,
108			once_cb,
109			data
110			);
111			}
112
113			static void
114			slf_init_timer (aTHX_ struct CoroSLF frame, SV *arg, int items)
115			{
116			SV *data;
117			NV after;
118
119			if (items != 1)
120			croak ("Coro::EV::timer_once requires exactly one parameter, not %d.\n", items);
121
122			data = sv_2mortal (newRV_inc (CORO_CURRENT));
123			frame->data = (void *)data;
124
125			after = SvNV (arg [0]);
126
127			ev_once (
128			EV_DEFAULT_UC,
129			-1,
130			0,
131			after >= 0. ? after : 0.,
132			once_cb,
133			data
134			);
135			}
136
137			/*****************************************************************************/
138
139	root	1.10	typedef struct
140			{
141			ev_io io;
142			ev_timer tw;
143	root	1.18	SV *data;
144	root	1.10	} coro_dir;
145
146			typedef struct
147			{
148			coro_dir r, w;
149			} coro_handle;
150
151			static int
152			handle_free (pTHX_ SV sv, MAGIC mg)
153			{
154			coro_handle data = (coro_handle )mg->mg_ptr;
155			mg->mg_ptr = 0;
156
157	root	1.15	ev_io_stop (EV_DEFAULT_UC, &data->r.io); ev_io_stop (EV_DEFAULT_UC, &data->w.io);
158			ev_timer_stop (EV_DEFAULT_UC, &data->r.tw); ev_timer_stop (EV_DEFAULT_UC, &data->w.tw);
159	root	1.10
160			return 0;
161			}
162
163			static MGVTBL handle_vtbl = { 0, 0, 0, 0, handle_free };
164
165			static void
166	root	1.18	handle_cb (coro_dir *dir, int success)
167	root	1.10	{
168	root	1.15	ev_io_stop (EV_DEFAULT_UC, &dir->io);
169			ev_timer_stop (EV_DEFAULT_UC, &dir->tw);
170	root	1.10
171	root	1.18	CORO_READY (dir->data);
172			sv_setiv (dir->data, success);
173	root	1.10	}
174
175			static void
176			handle_io_cb (EV_P_ ev_io *w, int revents)
177			{
178			handle_cb ((coro_dir )(((char )w) - offsetof (coro_dir, io)), 1);
179			}
180
181			static void
182			handle_timer_cb (EV_P_ ev_timer *w, int revents)
183			{
184			handle_cb ((coro_dir )(((char )w) - offsetof (coro_dir, tw)), 0);
185			}
186
187	root	1.18	static int
188			slf_check_rw (pTHX_ struct CoroSLF *frame)
189			{
190			SV data = (SV )frame->data;
191
192			if (SvROK (data))
193			return 1;
194			else
195			{
196			dSP;
197
198			XPUSHs (data);
199
200			PUTBACK;
201			return 0;
202			}
203			}
204
205			static void
206			slf_init_rw (aTHX_ struct CoroSLF frame, SV arg, int wr)
207			{
208			AV handle = (AV )SvRV (arg);
209			SV *data_sv = AvARRAY (handle)[5];
210			coro_handle *data;
211			coro_dir *dir;
212			assert (AvFILLp (handle) >= 7);
213
214			if (!SvOK (data_sv))
215			{
216			int fno = sv_fileno (AvARRAY (handle)[0]);
217			data_sv = AvARRAY (handle)[5] = NEWSV (0, sizeof (coro_handle));
218			SvPOK_only (data_sv);
219			SvREADONLY_on (data_sv);
220			data = (coro_handle *)SvPVX (data_sv);
221			memset (data, 0, sizeof (coro_handle));
222
223			ev_io_init (&data->r.io, handle_io_cb, fno, EV_READ);
224			ev_io_init (&data->w.io, handle_io_cb, fno, EV_WRITE);
225			ev_init (&data->r.tw, handle_timer_cb);
226			ev_init (&data->w.tw, handle_timer_cb);
227
228			sv_magicext (data_sv, 0, PERL_MAGIC_ext, &handle_vtbl, (char *)data, 0);
229			}
230			else
231			data = (coro_handle *)SvPVX (data_sv);
232
233			dir = wr ? &data->w : &data->r;
234
235			if (ev_is_active (&dir->io) \|\| ev_is_active (&dir->tw))
236			croak ("recursive invocation of readable_ev or writable_ev");
237
238			dir->data = sv_2mortal (newRV_inc (CORO_CURRENT));
239
240			{
241			SV *to = AvARRAY (handle)[2];
242
243			if (SvOK (to))
244			{
245			ev_timer_set (&dir->tw, 0., SvNV (to));
246			ev_timer_again (EV_DEFAULT_UC, &dir->tw);
247			}
248			}
249
250			ev_io_start (EV_DEFAULT_UC, &dir->io);
251
252			frame->data = (void *)dir->data;
253			frame->prepare = GCoroAPI->prepare_schedule;
254			frame->check = slf_check_rw;
255			}
256
257			static void
258			slf_init_readable (aTHX_ struct CoroSLF frame, SV *arg, int items)
259			{
260			slf_init_rw (aTHX_ frame, arg [0], 0);
261			}
262
263			static void
264			slf_init_writable (aTHX_ struct CoroSLF frame, SV *arg, int items)
265			{
266			slf_init_rw (aTHX_ frame, arg [0], 1);
267			}
268
269	root	1.10	/*****************************************************************************/
270
271	root	1.1	MODULE = Coro::EV PACKAGE = Coro::EV
272
273			PROTOTYPES: ENABLE
274
275			BOOT:
276			{
277			I_EV_API ("Coro::EV");
278			I_CORO_API ("Coro::Event");
279	root	1.2
280	root	1.17	EV_DEFAULT; /* make sure it is initialised */
281
282	root	1.3	ev_prepare_init (&scheduler, prepare_cb);
283	root	1.10	ev_set_priority (&scheduler, EV_MINPRI);
284	root	1.17	ev_prepare_start (EV_DEFAULT_UC, &scheduler);
285			ev_unref (EV_DEFAULT_UC);
286	root	1.2
287	root	1.3	ev_idle_init (&idler, idle_cb);
288	root	1.10	ev_set_priority (&idler, EV_MINPRI);
289	root	1.15
290			CORO_READYHOOK = readyhook;
291	root	1.1	}
292
293			void
294	root	1.9	_loop_oneshot ()
295			CODE:
296	root	1.17	{
297			/* inhibit the prepare watcher, as we know we are the only
298			* ready coroutine and we don't want it to start an idle watcher
299			* just because of the fallback idle coro being of lower priority.
300			*/
301	root	1.9	++inhibit;
302	root	1.17
303			/* same reasoning as above, make sure it is stopped */
304			if (ev_is_active (&idler))
305			ev_idle_stop (EV_DEFAULT_UC, &idler);
306
307			ev_loop (EV_DEFAULT_UC, EVLOOP_ONESHOT);
308
309	root	1.9	--inhibit;
310	root	1.17	}
311	root	1.9
312			void
313	root	1.18	timed_io_once (...)
314	root	1.1	CODE:
315	root	1.18	CORO_EXECUTE_SLF_XS (slf_init_timed_io);
316	root	1.1
317			void
318	root	1.18	timer_once (...)
319	root	1.1	CODE:
320	root	1.18	CORO_EXECUTE_SLF_XS (slf_init_timer);
321	root	1.1
322	root	1.10	void
323	root	1.18	readable_ev (...)
324	root	1.10	CODE:
325	root	1.18	CORO_EXECUTE_SLF_XS (slf_init_readable);
326	root	1.1
327	root	1.18	void
328			writable_ev (...)
329			CODE:
330			CORO_EXECUTE_SLF_XS (slf_init_writable);
331	root	1.1