cvsroot/EV-Loop-Async/Async.xs

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

#include <stddef.h>

#include "EVAPI.h"
#include "xthread.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;

  cond_t invoke_cv;

  SV *interrupt;
} udat;

static void
c_func (pTHX_ void *loop_, int value)
{
  struct ev_loop *loop = (struct ev_loop *)loop_;
  udat *u = ev_userdata (EV_A);
  X_LOCK (u->lock);
  ev_invoke_pending (loop);
  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);
  u->signal_func (u->signal_arg, 1);
  X_COND_WAIT (u->invoke_cv, u->lock);
}

X_THREAD_PROC(l_run)
{
  struct ev_loop *loop = (struct ev_loop *)thr_arg;
  udat *u = ev_userdata (loop);

  X_LOCK (u->lock);
  /* yeah */
  pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0);

  ev_ref (loop);
  ev_loop (loop, 0);
  ev_unref (loop);

  X_UNLOCK (u->lock);

  return 0;
}

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

  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 (loop, &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 (loop, u);
        ev_set_invoke_pending_cb (loop, l_invoke);
        ev_set_loop_release_cb (loop, l_release, l_acquire);

        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 (loop);

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

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 (loop);

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

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

        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 (loop);

        if (u)
          {
            X_LOCK (u->lock);
            ev_async_stop (loop, &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:	1.5
Committed:	Tue Jul 14 18:02:08 2009 UTC (15 years ago) by root
Branch:	MAIN
Changes since 1.4:	+14 -15 lines
Log Message:	* empty log message *
#	Content
1	#include "EXTERN.h"
2	#include "perl.h"
3	#include "XSUB.h"
4
5	#include <stddef.h>
6
7	#include "EVAPI.h"
8	#include "xthread.h"
9
10	/* our userdata */
11	typedef struct {
12	mutex_t lock; /* global loop lock */
13	void (signal_func) (void signal_arg, int value);
14	void *signal_arg;
15	ev_async async_w;
16	thread_t tid;
17
18	cond_t invoke_cv;
19
20	SV *interrupt;
21	} udat;
22
23	static void
24	c_func (pTHX_ void *loop_, int value)
25	{
26	struct ev_loop loop = (struct ev_loop )loop_;
27	udat *u = ev_userdata (EV_A);
28	X_LOCK (u->lock);
29	ev_invoke_pending (loop);
30	X_COND_SIGNAL (u->invoke_cv);
31	X_UNLOCK (u->lock);
32	}
33
34	static void
35	async_cb (EV_P_ ev_async *w, int revents)
36	{
37	/* just used for the side effects */
38	}
39
40	static void
41	l_release (EV_P)
42	{
43	udat *u = ev_userdata (EV_A);
44	X_UNLOCK (u->lock);
45	}
46
47	static void
48	l_acquire (EV_P)
49	{
50	udat *u = ev_userdata (EV_A);
51	X_LOCK (u->lock);
52	}
53
54	static void
55	l_invoke (EV_P)
56	{
57	udat *u = ev_userdata (EV_A);
58	u->signal_func (u->signal_arg, 1);
59	X_COND_WAIT (u->invoke_cv, u->lock);
60	}
61
62	X_THREAD_PROC(l_run)
63	{
64	struct ev_loop loop = (struct ev_loop )thr_arg;
65	udat *u = ev_userdata (loop);
66
67	X_LOCK (u->lock);
68	/* yeah */
69	pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0);
70
71	ev_ref (loop);
72	ev_loop (loop, 0);
73	ev_unref (loop);
74
75	X_UNLOCK (u->lock);
76
77	return 0;
78	}
79
80	static void
81	scope_lock_cb (pTHX_ void *loop_)
82	{
83	struct ev_loop loop = (struct ev_loop )SvIVX ((SV *)loop_);
84	udat *u = ev_userdata (loop);
85
86	X_UNLOCK (u->lock);
87	SvREFCNT_dec ((SV *)loop_);
88	}
89
90	MODULE = EV::Loop::Async PACKAGE = EV::Loop::Async
91
92	PROTOTYPES: ENABLE
93
94	BOOT:
95	{
96	I_EV_API ("EV::Loop::Async");
97	CvNODEBUG_on (get_cv ("EV::Loop::Async::scope_lock", 0)); /* otherwise calling scope can be the debugger */
98	}
99
100	void
101	_c_func (SV *loop)
102	PPCODE:
103	EXTEND (SP, 2);
104	PUSHs (sv_2mortal (newSViv (PTR2IV (c_func))));
105	PUSHs (sv_2mortal (newSViv (SvIVX (SvRV (loop)))));
106
107	void
108	_attach (SV loop_, SV interrupt, IV sig_func, void *sig_arg)
109	CODE:
110	{
111	pthread_mutexattr_t ma;
112	struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
113	udat *u;
114
115	Newz (0, u, 1, udat);
116	u->interrupt = newSVsv (interrupt);
117	u->signal_func = (void ()(void , int))sig_func;
118	u->signal_arg = sig_arg;
119
120	ev_async_init (&u->async_w, async_cb);
121	ev_async_start (loop, &u->async_w);
122
123	pthread_mutexattr_init (&ma);
124	pthread_mutexattr_settype (&ma, PTHREAD_MUTEX_RECURSIVE);
125	pthread_mutex_init (&u->lock, &ma);
126	pthread_mutexattr_destroy (&ma);
127
128	pthread_cond_init (&u->invoke_cv, 0);
129
130	ev_set_userdata (loop, u);
131	ev_set_invoke_pending_cb (loop, l_invoke);
132	ev_set_loop_release_cb (loop, l_release, l_acquire);
133
134	thread_create (&u->tid, l_run, loop);
135	}
136
137	SV *
138	interrupt (SV *loop_)
139	CODE:
140	{
141	struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
142	udat *u = ev_userdata (loop);
143
144	RETVAL = newSVsv (u->interrupt);
145	}
146	OUTPUT:
147	RETVAL
148
149	void
150	lock (SV *loop_)
151	ALIAS:
152	lock = 0
153	unlock = 1
154	notify = 2
155	CODE:
156	{
157	struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
158	udat *u = ev_userdata (loop);
159
160	switch (ix)
161	{
162	case 0: X_LOCK (u->lock); break;
163	case 1: X_UNLOCK (u->lock); break;
164	case 2: ev_async_send (loop, &u->async_w); break;
165	}
166	}
167
168	void
169	scope_lock (SV *loop_)
170	CODE:
171	{
172	struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
173	udat *u = ev_userdata (loop);
174
175	X_LOCK (u->lock);
176
177	LEAVE; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
178	SAVEDESTRUCTOR_X (scope_lock_cb, (void *)SvREFCNT_inc (SvRV (loop_)));
179	ENTER; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
180	}
181
182	void
183	DESTROY (SV *loop_)
184	CODE:
185	{
186	struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
187	udat *u = ev_userdata (loop);
188
189	if (u)
190	{
191	X_LOCK (u->lock);
192	ev_async_stop (loop, &u->async_w);
193	/* now thread is around blocking call, or in pthread_cond_wait */
194	pthread_cancel (u->tid);
195	pthread_mutex_destroy (&u->lock);
196	pthread_cond_destroy (&u->invoke_cv);
197	SvREFCNT_dec (u->interrupt);
198	Safefree (u);
199	}
200	}
201
202
203