cvsroot/EV-Loop-Async/Async.xs

#include "xthread.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:	1.8
Committed:	Fri Jul 17 02:52:22 2009 UTC (14 years, 11 months ago) by root
Branch:	MAIN
Changes since 1.7:	+67 -14 lines
Log Message:	* empty log message *
#	Content
1	#include "xthread.h"
2
3	#include "EXTERN.h"
4	#include "perl.h"
5	#include "XSUB.h"
6
7	#include <stddef.h>
8
9	#include "EVAPI.h"
10
11	/* our userdata */
12	typedef struct {
13	mutex_t lock; /* global loop lock */
14	void (signal_func) (void signal_arg, int value);
15	void *signal_arg;
16	ev_async async_w;
17	thread_t tid;
18	unsigned int max_loops;
19	unsigned int count;
20
21	cond_t invoke_cv;
22
23	SV *interrupt;
24	} udat;
25
26	static void loop_set_cb (EV_P);
27
28	static void
29	fg_invoke_pending (EV_P)
30	{
31	udat *u = ev_userdata (EV_A);
32
33	u->count = ev_pending_count (EV_A);
34
35	if (u->count)
36	ev_invoke_pending (EV_A);
37	}
38
39	static void
40	c_func (pTHX_ void *loop_, int value)
41	{
42	struct ev_loop loop = (struct ev_loop )loop_;
43	udat *u = ev_userdata (EV_A);
44	int i;
45
46	X_LOCK (u->lock);
47	ev_invoke_pending (EV_A);
48
49	/* do any additional foreground loop runs */
50	for (i = u->max_loops; i--; )
51	{
52	/* this is a bit tricky, but we can manage... */
53	u->count = 0;
54
55	ev_set_invoke_pending_cb (EV_A, fg_invoke_pending);
56	ev_set_loop_release_cb (EV_A, 0, 0);
57	ev_loop (EV_A, EVLOOP_NONBLOCK);
58	loop_set_cb (EV_A);
59
60	if (!u->count)
61	break;
62	}
63
64	X_COND_SIGNAL (u->invoke_cv);
65	X_UNLOCK (u->lock);
66	}
67
68	static void
69	async_cb (EV_P_ ev_async *w, int revents)
70	{
71	/* just used for the side effects */
72	}
73
74	static void
75	l_release (EV_P)
76	{
77	udat *u = ev_userdata (EV_A);
78	X_UNLOCK (u->lock);
79	}
80
81	static void
82	l_acquire (EV_P)
83	{
84	udat *u = ev_userdata (EV_A);
85	X_LOCK (u->lock);
86	}
87
88	static void
89	l_invoke (EV_P)
90	{
91	udat *u = ev_userdata (EV_A);
92
93	while (ev_pending_count (EV_A))
94	{
95	u->signal_func (u->signal_arg, 1);
96	X_COND_WAIT (u->invoke_cv, u->lock);
97	}
98	}
99
100	static void
101	loop_set_cb (EV_P)
102	{
103	ev_set_invoke_pending_cb (EV_A, l_invoke);
104	ev_set_loop_release_cb (EV_A, l_release, l_acquire);
105	}
106
107	X_THREAD_PROC(l_run)
108	{
109	struct ev_loop loop = (struct ev_loop )thr_arg;
110
111	l_acquire (EV_A);
112
113	/* yeah */
114	pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0);
115
116	ev_ref (EV_A);
117	ev_loop (EV_A, 0);
118	ev_unref (EV_A);
119
120	l_release (EV_A);
121
122	return 0;
123	}
124
125	static void
126	scope_lock_cb (pTHX_ void *loop_)
127	{
128	struct ev_loop loop = (struct ev_loop )SvIVX ((SV *)loop_);
129	udat *u = ev_userdata (EV_A);
130
131	X_UNLOCK (u->lock);
132	SvREFCNT_dec ((SV *)loop_);
133	}
134
135	MODULE = EV::Loop::Async PACKAGE = EV::Loop::Async
136
137	PROTOTYPES: ENABLE
138
139	BOOT:
140	{
141	I_EV_API ("EV::Loop::Async");
142	CvNODEBUG_on (get_cv ("EV::Loop::Async::scope_lock", 0)); /* otherwise calling scope can be the debugger */
143	}
144
145	void
146	_c_func (SV *loop)
147	PPCODE:
148	EXTEND (SP, 2);
149	PUSHs (sv_2mortal (newSViv (PTR2IV (c_func))));
150	PUSHs (sv_2mortal (newSViv (SvIVX (SvRV (loop)))));
151
152	void
153	_attach (SV loop_, SV interrupt, IV sig_func, void *sig_arg)
154	CODE:
155	{
156	pthread_mutexattr_t ma;
157	struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
158	udat *u;
159
160	Newz (0, u, 1, udat);
161	u->interrupt = newSVsv (interrupt);
162	u->signal_func = (void ()(void , int))sig_func;
163	u->signal_arg = sig_arg;
164
165	ev_async_init (&u->async_w, async_cb);
166	ev_async_start (EV_A, &u->async_w);
167
168	pthread_mutexattr_init (&ma);
169	pthread_mutexattr_settype (&ma, PTHREAD_MUTEX_RECURSIVE);
170	pthread_mutex_init (&u->lock, &ma);
171	pthread_mutexattr_destroy (&ma);
172
173	pthread_cond_init (&u->invoke_cv, 0);
174
175	ev_set_userdata (EV_A, u);
176	loop_set_cb (EV_A);
177
178	thread_create (&u->tid, l_run, loop);
179	}
180
181	SV *
182	interrupt (SV *loop_)
183	CODE:
184	{
185	struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
186	udat *u = ev_userdata (EV_A);
187
188	RETVAL = newSVsv (u->interrupt);
189	}
190	OUTPUT:
191	RETVAL
192
193	void
194	set_max_foreground_loops (SV *loop_, UV max_loops)
195	CODE:
196	{
197	struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
198	udat *u = ev_userdata (EV_A);
199
200	u->max_loops = max_loops;
201	}
202
203	void
204	lock (SV *loop_)
205	ALIAS:
206	lock = 0
207	unlock = 1
208	notify = 2
209	CODE:
210	{
211	struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
212	udat *u = ev_userdata (EV_A);
213
214	switch (ix)
215	{
216	case 0: X_LOCK (u->lock); break;
217	case 1: X_UNLOCK (u->lock); break;
218	case 2: ev_async_send (EV_A, &u->async_w); break;
219	}
220	}
221
222	void
223	scope_lock (SV *loop_)
224	CODE:
225	{
226	struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
227	udat *u = ev_userdata (EV_A);
228
229	X_LOCK (u->lock);
230
231	LEAVE; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
232	SAVEDESTRUCTOR_X (scope_lock_cb, (void *)SvREFCNT_inc (SvRV (loop_)));
233	ENTER; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
234	}
235
236	void
237	DESTROY (SV *loop_)
238	CODE:
239	{
240	struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
241	udat *u = ev_userdata (EV_A);
242
243	if (u)
244	{
245	X_LOCK (u->lock);
246	ev_async_stop (EV_A, &u->async_w);
247	/* now thread is around blocking call, or in pthread_cond_wait */
248	pthread_cancel (u->tid);
249	pthread_mutex_destroy (&u->lock);
250	pthread_cond_destroy (&u->invoke_cv);
251	SvREFCNT_dec (u->interrupt);
252	Safefree (u);
253	}
254	}
255
256
257