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 {
  mutex_t lock; /* global loop lock */
  void (*signal_func) (void *signal_arg, int value);
  void *signal_arg;
  ev_async async_w;
  thread_t tid;
  unsigned int max_loops;
  unsigned int count;

  cond_t invoke_cv;

  SV *interrupt;
} 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_loop (EV_A, EVLOOP_NONBLOCK);
      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;

  l_acquire (EV_A);

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

  ev_ref (EV_A);
  ev_loop (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)
        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;

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

        pthread_mutexattr_init (&ma);
        pthread_mutexattr_settype (&ma, PTHREAD_MUTEX_RECURSIVE);
        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);

        thread_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);
            pthread_mutex_destroy (&u->lock);
            pthread_cond_destroy (&u->invoke_cv);
            SvREFCNT_dec (u->interrupt);
            Safefree (u);
          }
}


Revision:	1.9
Committed:	Fri Jul 17 03:28:57 2009 UTC (17 years, 2 months ago) by root
Branch:	MAIN
CVS Tags:	rel-0_02
Changes since 1.8:	+2 -0 lines
Log Message:	* empty log message *
#	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			mutex_t lock; /* global loop lock */
16			void (signal_func) (void signal_arg, int value);
17			void *signal_arg;
18			ev_async async_w;
19			thread_t tid;
20	root	1.8	unsigned int max_loops;
21			unsigned int count;
22	root	1.1
23			cond_t invoke_cv;
24
25	root	1.2	SV *interrupt;
26	root	1.1	} udat;
27
28	root	1.8	static void loop_set_cb (EV_P);
29
30			static void
31			fg_invoke_pending (EV_P)
32			{
33			udat *u = ev_userdata (EV_A);
34
35			u->count = ev_pending_count (EV_A);
36
37			if (u->count)
38			ev_invoke_pending (EV_A);
39			}
40
41	root	1.1	static void
42			c_func (pTHX_ void *loop_, int value)
43			{
44			struct ev_loop loop = (struct ev_loop )loop_;
45			udat *u = ev_userdata (EV_A);
46	root	1.8	int i;
47
48	root	1.1	X_LOCK (u->lock);
49	root	1.8	ev_invoke_pending (EV_A);
50
51			/* do any additional foreground loop runs */
52			for (i = u->max_loops; i--; )
53			{
54			/* this is a bit tricky, but we can manage... */
55			u->count = 0;
56
57			ev_set_invoke_pending_cb (EV_A, fg_invoke_pending);
58			ev_set_loop_release_cb (EV_A, 0, 0);
59			ev_loop (EV_A, EVLOOP_NONBLOCK);
60			loop_set_cb (EV_A);
61
62			if (!u->count)
63			break;
64			}
65
66	root	1.5	X_COND_SIGNAL (u->invoke_cv);
67	root	1.1	X_UNLOCK (u->lock);
68			}
69
70			static void
71			async_cb (EV_P_ ev_async *w, int revents)
72			{
73			/* just used for the side effects */
74			}
75
76			static void
77			l_release (EV_P)
78			{
79			udat *u = ev_userdata (EV_A);
80			X_UNLOCK (u->lock);
81			}
82
83			static void
84			l_acquire (EV_P)
85			{
86			udat *u = ev_userdata (EV_A);
87			X_LOCK (u->lock);
88			}
89
90			static void
91			l_invoke (EV_P)
92			{
93			udat *u = ev_userdata (EV_A);
94	root	1.8
95			while (ev_pending_count (EV_A))
96			{
97			u->signal_func (u->signal_arg, 1);
98			X_COND_WAIT (u->invoke_cv, u->lock);
99			}
100			}
101
102			static void
103			loop_set_cb (EV_P)
104			{
105			ev_set_invoke_pending_cb (EV_A, l_invoke);
106			ev_set_loop_release_cb (EV_A, l_release, l_acquire);
107	root	1.1	}
108
109			X_THREAD_PROC(l_run)
110			{
111			struct ev_loop loop = (struct ev_loop )thr_arg;
112
113	root	1.6	l_acquire (EV_A);
114
115	root	1.5	/* yeah */
116			pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0);
117
118	root	1.6	ev_ref (EV_A);
119			ev_loop (EV_A, 0);
120			ev_unref (EV_A);
121	root	1.5
122	root	1.6	l_release (EV_A);
123	root	1.5
124			return 0;
125	root	1.1	}
126
127	root	1.2	static void
128			scope_lock_cb (pTHX_ void *loop_)
129			{
130			struct ev_loop loop = (struct ev_loop )SvIVX ((SV *)loop_);
131	root	1.8	udat *u = ev_userdata (EV_A);
132	root	1.2
133			X_UNLOCK (u->lock);
134			SvREFCNT_dec ((SV *)loop_);
135			}
136
137	root	1.1	MODULE = EV::Loop::Async PACKAGE = EV::Loop::Async
138
139			PROTOTYPES: ENABLE
140
141			BOOT:
142			{
143			I_EV_API ("EV::Loop::Async");
144	root	1.3	CvNODEBUG_on (get_cv ("EV::Loop::Async::scope_lock", 0)); /* otherwise calling scope can be the debugger */
145	root	1.1	}
146
147			void
148			_c_func (SV *loop)
149			PPCODE:
150			EXTEND (SP, 2);
151			PUSHs (sv_2mortal (newSViv (PTR2IV (c_func))));
152			PUSHs (sv_2mortal (newSViv (SvIVX (SvRV (loop)))));
153
154			void
155	root	1.2	_attach (SV loop_, SV interrupt, IV sig_func, void *sig_arg)
156	root	1.1	CODE:
157			{
158			pthread_mutexattr_t ma;
159			struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
160			udat *u;
161
162			Newz (0, u, 1, udat);
163	root	1.2	u->interrupt = newSVsv (interrupt);
164	root	1.1	u->signal_func = (void ()(void , int))sig_func;
165			u->signal_arg = sig_arg;
166
167			ev_async_init (&u->async_w, async_cb);
168	root	1.8	ev_async_start (EV_A, &u->async_w);
169	root	1.1
170			pthread_mutexattr_init (&ma);
171			pthread_mutexattr_settype (&ma, PTHREAD_MUTEX_RECURSIVE);
172			pthread_mutex_init (&u->lock, &ma);
173			pthread_mutexattr_destroy (&ma);
174
175			pthread_cond_init (&u->invoke_cv, 0);
176
177	root	1.8	ev_set_userdata (EV_A, u);
178			loop_set_cb (EV_A);
179	root	1.1
180	root	1.5	thread_create (&u->tid, l_run, loop);
181	root	1.1	}
182
183	root	1.2	SV *
184			interrupt (SV *loop_)
185			CODE:
186			{
187			struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
188	root	1.8	udat *u = ev_userdata (EV_A);
189	root	1.2
190			RETVAL = newSVsv (u->interrupt);
191			}
192			OUTPUT:
193			RETVAL
194
195	root	1.1	void
196	root	1.8	set_max_foreground_loops (SV *loop_, UV max_loops)
197			CODE:
198			{
199			struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
200			udat *u = ev_userdata (EV_A);
201
202			u->max_loops = max_loops;
203			}
204
205			void
206	root	1.1	lock (SV *loop_)
207			ALIAS:
208			lock = 0
209			unlock = 1
210	root	1.3	notify = 2
211	root	1.1	CODE:
212			{
213			struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
214	root	1.8	udat *u = ev_userdata (EV_A);
215	root	1.1
216			switch (ix)
217			{
218			case 0: X_LOCK (u->lock); break;
219			case 1: X_UNLOCK (u->lock); break;
220	root	1.8	case 2: ev_async_send (EV_A, &u->async_w); break;
221	root	1.1	}
222			}
223
224			void
225	root	1.2	scope_lock (SV *loop_)
226			CODE:
227			{
228			struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
229	root	1.8	udat *u = ev_userdata (EV_A);
230	root	1.2
231			X_LOCK (u->lock);
232
233			LEAVE; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
234			SAVEDESTRUCTOR_X (scope_lock_cb, (void *)SvREFCNT_inc (SvRV (loop_)));
235			ENTER; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
236			}
237
238			void
239	root	1.1	DESTROY (SV *loop_)
240			CODE:
241			{
242			struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
243	root	1.8	udat *u = ev_userdata (EV_A);
244	root	1.1
245			if (u)
246			{
247	root	1.4	X_LOCK (u->lock);
248	root	1.8	ev_async_stop (EV_A, &u->async_w);
249	root	1.5	/* now thread is around blocking call, or in pthread_cond_wait */
250			pthread_cancel (u->tid);
251	root	1.1	pthread_mutex_destroy (&u->lock);
252			pthread_cond_destroy (&u->invoke_cv);
253	root	1.3	SvREFCNT_dec (u->interrupt);
254	root	1.1	Safefree (u);
255			}
256			}
257
258
259