EV-Loop-Async/Async.xs

#include "xthread.h"

#include <errno.h>

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

#include <stddef.h>

#include "EVAPI.h"

/* our userdata */
typedef struct {
  xmutex_t lock; /* global loop lock */
  void (*signal_func) (void *signal_arg, int value);
  void *signal_arg;
  ev_async async_w;
  xthread_t tid;
  unsigned int max_loops;
  unsigned int count;

  xcond_t invoke_cv;

  SV *interrupt;
#if defined(_WIN32) && defined(USE_ITHREADS)
  void *thx;
#endif
} udat;

static void loop_set_cb (EV_P);

static void
fg_invoke_pending (EV_P)
{
  udat *u = ev_userdata (EV_A);

  u->count = ev_pending_count (EV_A);

  if (u->count)
    ev_invoke_pending (EV_A);
}

static void
c_func (pTHX_ void *loop_, int value)
{
  struct ev_loop *loop = (struct ev_loop *)loop_;
  udat *u = ev_userdata (EV_A);
  int i;

  X_LOCK (u->lock);
  ev_invoke_pending (EV_A);

  /* do any additional foreground loop runs */
  for (i = u->max_loops; i--; )
    {
      /* this is a bit tricky, but we can manage... */
      u->count = 0;

      ev_set_invoke_pending_cb (EV_A, fg_invoke_pending);
      ev_set_loop_release_cb (EV_A, 0, 0);
      ev_run (EV_A, EVRUN_NOWAIT);
      loop_set_cb (EV_A);

      if (!u->count)
        break;
    }

  X_COND_SIGNAL (u->invoke_cv);
  X_UNLOCK (u->lock);
}

static void
async_cb (EV_P_ ev_async *w, int revents)
{
  /* just used for the side effects */
}

static void
l_release (EV_P)
{
  udat *u = ev_userdata (EV_A);
  X_UNLOCK (u->lock);
}

static void
l_acquire (EV_P)
{
  udat *u = ev_userdata (EV_A);
  X_LOCK (u->lock);
}

static void
l_invoke (EV_P)
{
  udat *u = ev_userdata (EV_A);

  while (ev_pending_count (EV_A))
    {
      u->signal_func (u->signal_arg, 1);
      X_COND_WAIT (u->invoke_cv, u->lock);
    }
}

static void
loop_set_cb (EV_P)
{
  ev_set_invoke_pending_cb (EV_A, l_invoke);
  ev_set_loop_release_cb (EV_A, l_release, l_acquire);
}

X_THREAD_PROC(l_run)
{
  struct ev_loop *loop = (struct ev_loop *)thr_arg;
#if defined(_WIN32) && defined(USE_ITHREADS)
  udat *u = ev_userdata (EV_A);

  /* just setting the same context pointer as the other thread is */
  /* probably fatal, yet, I have no clue what makes libev crash (malloc?) */
  /* as visual c also crashes when it tries to debug the crash */
  /* the loser platform is indeed a crashy OS */
  PERL_SET_CONTEXT (u->thx);
#endif

  l_acquire (EV_A);

  /* yeah */
  pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0);

  ev_ref (EV_A);
  ev_run (EV_A, 0);
  ev_unref (EV_A);

  l_release (EV_A);

  return 0;
}

static void
scope_lock_cb (pTHX_ void *loop_)
{
  struct ev_loop *loop = (struct ev_loop *)SvIVX ((SV *)loop_);
  udat *u = ev_userdata (EV_A);

  X_UNLOCK (u->lock);
  SvREFCNT_dec ((SV *)loop_);
}

MODULE = EV::Loop::Async                PACKAGE = EV::Loop::Async

PROTOTYPES: ENABLE

BOOT:
{
        I_EV_API ("EV::Loop::Async");
        CvNODEBUG_on (get_cv ("EV::Loop::Async::scope_lock", 0)); /* otherwise calling scope can be the debugger */
}

void
_c_func (SV *loop)
        PPCODE:
        EXTEND (SP, 2);
        PUSHs (sv_2mortal (newSViv (PTR2IV (c_func))));
        PUSHs (sv_2mortal (newSViv (SvIVX (SvRV (loop)))));

void
_attach (SV *loop_, SV *interrupt, IV sig_func, void *sig_arg)
        PROTOTYPE: @
        CODE:
{
        pthread_mutexattr_t ma;
        struct ev_loop *loop = (struct ev_loop *)SvIVX (SvRV (loop_));
        udat *u;

        Newz (0, u, 1, udat);
        u->interrupt   = newSVsv (interrupt);
        u->signal_func = (void (*)(void *, int))sig_func;
        u->signal_arg  = sig_arg;
#if defined(_WIN32) && defined(USE_ITHREADS)
        u->thx         = PERL_GET_CONTEXT;
#endif

        ev_async_init (&u->async_w, async_cb);
        ev_async_start (EV_A, &u->async_w);

        pthread_mutexattr_init (&ma);
#ifdef PTHREAD_MUTEX_RECURSIVE
        pthread_mutexattr_settype (&ma, PTHREAD_MUTEX_RECURSIVE);
#else
        pthread_mutexattr_settype (&ma, PTHREAD_MUTEX_RECURSIVE_NP);
#endif
        pthread_mutex_init (&u->lock, &ma);
        pthread_mutexattr_destroy (&ma);

        pthread_cond_init (&u->invoke_cv, 0);

        ev_set_userdata (EV_A, u);
        loop_set_cb (EV_A);

        xthread_create (&u->tid, l_run, loop);
}

SV *
interrupt (SV *loop_)
        CODE:
{
        struct ev_loop *loop = (struct ev_loop *)SvIVX (SvRV (loop_));
        udat *u = ev_userdata (EV_A);

        RETVAL = newSVsv (u->interrupt);
}
        OUTPUT:
        RETVAL

void
set_max_foreground_loops (SV *loop_, UV max_loops)
        CODE:
{
        struct ev_loop *loop = (struct ev_loop *)SvIVX (SvRV (loop_));
        udat *u = ev_userdata (EV_A);

        u->max_loops = max_loops;
}

void
lock (SV *loop_)
        ALIAS:
        lock   = 0
        unlock = 1
        notify = 2
        CODE:
{
        struct ev_loop *loop = (struct ev_loop *)SvIVX (SvRV (loop_));
        udat *u = ev_userdata (EV_A);

        switch (ix)
          {
            case 0: X_LOCK   (u->lock); break;
            case 1: X_UNLOCK (u->lock); break;
            case 2: ev_async_send (EV_A, &u->async_w); break;
          }
}

void
scope_lock (SV *loop_)
        CODE:
{
        struct ev_loop *loop = (struct ev_loop *)SvIVX (SvRV (loop_));
        udat *u = ev_userdata (EV_A);

        X_LOCK (u->lock);

        LEAVE; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
        SAVEDESTRUCTOR_X (scope_lock_cb, (void *)SvREFCNT_inc (SvRV (loop_)));
        ENTER; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
}

void
DESTROY (SV *loop_)
        CODE:
{
        struct ev_loop *loop = (struct ev_loop *)SvIVX (SvRV (loop_));
        udat *u = ev_userdata (EV_A);

        if (u)
          {
            X_LOCK (u->lock);
            ev_async_stop (EV_A, &u->async_w);
            /* now thread is around blocking call, or in pthread_cond_wait */
            pthread_cancel (u->tid);
            X_UNLOCK (u->lock);
            pthread_mutex_destroy (&u->lock);
            pthread_cond_destroy (&u->invoke_cv);
            SvREFCNT_dec (u->interrupt);
            Safefree (u);
          }
}


Revision:	1.13
Committed:	Thu Oct 11 05:02:54 2012 UTC (11 years, 7 months ago) by root
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.12:	+1 -1 lines
Log Message:	xthread_create
#	User	Rev	Content
1	root	1.7	#include "xthread.h"
2
3	root	1.9	#include <errno.h>
4
5	root	1.1	#include "EXTERN.h"
6			#include "perl.h"
7			#include "XSUB.h"
8
9			#include <stddef.h>
10
11			#include "EVAPI.h"
12
13			/* our userdata */
14			typedef struct {
15	root	1.11	xmutex_t lock; /* global loop lock */
16	root	1.1	void (signal_func) (void signal_arg, int value);
17			void *signal_arg;
18			ev_async async_w;
19	root	1.11	xthread_t tid;
20	root	1.8	unsigned int max_loops;
21			unsigned int count;
22	root	1.1
23	root	1.11	xcond_t invoke_cv;
24	root	1.1
25	root	1.2	SV *interrupt;
26	root	1.10	#if defined(_WIN32) && defined(USE_ITHREADS)
27			void *thx;
28			#endif
29	root	1.1	} udat;
30
31	root	1.8	static void loop_set_cb (EV_P);
32
33			static void
34			fg_invoke_pending (EV_P)
35			{
36			udat *u = ev_userdata (EV_A);
37
38			u->count = ev_pending_count (EV_A);
39
40			if (u->count)
41			ev_invoke_pending (EV_A);
42			}
43
44	root	1.1	static void
45			c_func (pTHX_ void *loop_, int value)
46			{
47			struct ev_loop loop = (struct ev_loop )loop_;
48			udat *u = ev_userdata (EV_A);
49	root	1.8	int i;
50
51	root	1.1	X_LOCK (u->lock);
52	root	1.8	ev_invoke_pending (EV_A);
53
54			/* do any additional foreground loop runs */
55			for (i = u->max_loops; i--; )
56			{
57			/* this is a bit tricky, but we can manage... */
58			u->count = 0;
59
60			ev_set_invoke_pending_cb (EV_A, fg_invoke_pending);
61			ev_set_loop_release_cb (EV_A, 0, 0);
62	root	1.12	ev_run (EV_A, EVRUN_NOWAIT);
63	root	1.8	loop_set_cb (EV_A);
64
65			if (!u->count)
66			break;
67			}
68
69	root	1.5	X_COND_SIGNAL (u->invoke_cv);
70	root	1.1	X_UNLOCK (u->lock);
71			}
72
73			static void
74			async_cb (EV_P_ ev_async *w, int revents)
75			{
76			/* just used for the side effects */
77			}
78
79			static void
80			l_release (EV_P)
81			{
82			udat *u = ev_userdata (EV_A);
83			X_UNLOCK (u->lock);
84			}
85
86			static void
87			l_acquire (EV_P)
88			{
89			udat *u = ev_userdata (EV_A);
90			X_LOCK (u->lock);
91			}
92
93			static void
94			l_invoke (EV_P)
95			{
96			udat *u = ev_userdata (EV_A);
97	root	1.8
98			while (ev_pending_count (EV_A))
99			{
100			u->signal_func (u->signal_arg, 1);
101			X_COND_WAIT (u->invoke_cv, u->lock);
102			}
103			}
104
105			static void
106			loop_set_cb (EV_P)
107			{
108			ev_set_invoke_pending_cb (EV_A, l_invoke);
109			ev_set_loop_release_cb (EV_A, l_release, l_acquire);
110	root	1.1	}
111
112			X_THREAD_PROC(l_run)
113			{
114			struct ev_loop loop = (struct ev_loop )thr_arg;
115	root	1.10	#if defined(_WIN32) && defined(USE_ITHREADS)
116			udat *u = ev_userdata (EV_A);
117
118			/* just setting the same context pointer as the other thread is */
119			/* probably fatal, yet, I have no clue what makes libev crash (malloc?) */
120			/* as visual c also crashes when it tries to debug the crash */
121			/* the loser platform is indeed a crashy OS */
122			PERL_SET_CONTEXT (u->thx);
123			#endif
124	root	1.1
125	root	1.6	l_acquire (EV_A);
126
127	root	1.5	/* yeah */
128			pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0);
129
130	root	1.6	ev_ref (EV_A);
131	root	1.12	ev_run (EV_A, 0);
132	root	1.6	ev_unref (EV_A);
133	root	1.5
134	root	1.6	l_release (EV_A);
135	root	1.5
136			return 0;
137	root	1.1	}
138
139	root	1.2	static void
140			scope_lock_cb (pTHX_ void *loop_)
141			{
142			struct ev_loop loop = (struct ev_loop )SvIVX ((SV *)loop_);
143	root	1.8	udat *u = ev_userdata (EV_A);
144	root	1.2
145			X_UNLOCK (u->lock);
146			SvREFCNT_dec ((SV *)loop_);
147			}
148
149	root	1.1	MODULE = EV::Loop::Async PACKAGE = EV::Loop::Async
150
151			PROTOTYPES: ENABLE
152
153			BOOT:
154			{
155			I_EV_API ("EV::Loop::Async");
156	root	1.3	CvNODEBUG_on (get_cv ("EV::Loop::Async::scope_lock", 0)); /* otherwise calling scope can be the debugger */
157	root	1.1	}
158
159			void
160			_c_func (SV *loop)
161			PPCODE:
162			EXTEND (SP, 2);
163			PUSHs (sv_2mortal (newSViv (PTR2IV (c_func))));
164			PUSHs (sv_2mortal (newSViv (SvIVX (SvRV (loop)))));
165
166			void
167	root	1.2	_attach (SV loop_, SV interrupt, IV sig_func, void *sig_arg)
168	root	1.11	PROTOTYPE: @
169	root	1.1	CODE:
170			{
171			pthread_mutexattr_t ma;
172			struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
173			udat *u;
174
175			Newz (0, u, 1, udat);
176	root	1.2	u->interrupt = newSVsv (interrupt);
177	root	1.1	u->signal_func = (void ()(void , int))sig_func;
178			u->signal_arg = sig_arg;
179	root	1.10	#if defined(_WIN32) && defined(USE_ITHREADS)
180			u->thx = PERL_GET_CONTEXT;
181			#endif
182	root	1.1
183			ev_async_init (&u->async_w, async_cb);
184	root	1.8	ev_async_start (EV_A, &u->async_w);
185	root	1.1
186			pthread_mutexattr_init (&ma);
187	root	1.11	#ifdef PTHREAD_MUTEX_RECURSIVE
188	root	1.1	pthread_mutexattr_settype (&ma, PTHREAD_MUTEX_RECURSIVE);
189	root	1.11	#else
190			pthread_mutexattr_settype (&ma, PTHREAD_MUTEX_RECURSIVE_NP);
191			#endif
192	root	1.1	pthread_mutex_init (&u->lock, &ma);
193			pthread_mutexattr_destroy (&ma);
194
195			pthread_cond_init (&u->invoke_cv, 0);
196
197	root	1.8	ev_set_userdata (EV_A, u);
198			loop_set_cb (EV_A);
199	root	1.1
200	root	1.13	xthread_create (&u->tid, l_run, loop);
201	root	1.1	}
202
203	root	1.2	SV *
204			interrupt (SV *loop_)
205			CODE:
206			{
207			struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
208	root	1.8	udat *u = ev_userdata (EV_A);
209	root	1.2
210			RETVAL = newSVsv (u->interrupt);
211			}
212			OUTPUT:
213			RETVAL
214
215	root	1.1	void
216	root	1.8	set_max_foreground_loops (SV *loop_, UV max_loops)
217			CODE:
218			{
219			struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
220			udat *u = ev_userdata (EV_A);
221
222			u->max_loops = max_loops;
223			}
224
225			void
226	root	1.1	lock (SV *loop_)
227			ALIAS:
228			lock = 0
229			unlock = 1
230	root	1.3	notify = 2
231	root	1.1	CODE:
232			{
233			struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
234	root	1.8	udat *u = ev_userdata (EV_A);
235	root	1.1
236			switch (ix)
237			{
238			case 0: X_LOCK (u->lock); break;
239			case 1: X_UNLOCK (u->lock); break;
240	root	1.8	case 2: ev_async_send (EV_A, &u->async_w); break;
241	root	1.1	}
242			}
243
244			void
245	root	1.2	scope_lock (SV *loop_)
246			CODE:
247			{
248			struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
249	root	1.8	udat *u = ev_userdata (EV_A);
250	root	1.2
251			X_LOCK (u->lock);
252
253			LEAVE; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
254			SAVEDESTRUCTOR_X (scope_lock_cb, (void *)SvREFCNT_inc (SvRV (loop_)));
255			ENTER; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
256			}
257
258			void
259	root	1.1	DESTROY (SV *loop_)
260			CODE:
261			{
262			struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
263	root	1.8	udat *u = ev_userdata (EV_A);
264	root	1.1
265			if (u)
266			{
267	root	1.4	X_LOCK (u->lock);
268	root	1.8	ev_async_stop (EV_A, &u->async_w);
269	root	1.5	/* now thread is around blocking call, or in pthread_cond_wait */
270			pthread_cancel (u->tid);
271	root	1.10	X_UNLOCK (u->lock);
272	root	1.1	pthread_mutex_destroy (&u->lock);
273			pthread_cond_destroy (&u->invoke_cv);
274	root	1.3	SvREFCNT_dec (u->interrupt);
275	root	1.1	Safefree (u);
276			}
277			}
278
279
280