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;

  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 (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:	1.6
Committed:	Tue Jul 14 19:05:10 2009 UTC (14 years, 10 months ago) by root
Branch:	MAIN
Changes since 1.5:	+6 -6 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			#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	root	1.2	SV *interrupt;
21	root	1.1	} 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	root	1.5	X_COND_SIGNAL (u->invoke_cv);
31	root	1.1	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	root	1.5	X_COND_WAIT (u->invoke_cv, u->lock);
60	root	1.1	}
61
62			X_THREAD_PROC(l_run)
63			{
64			struct ev_loop loop = (struct ev_loop )thr_arg;
65
66	root	1.6	l_acquire (EV_A);
67
68	root	1.5	/* yeah */
69			pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0);
70
71	root	1.6	ev_ref (EV_A);
72			ev_loop (EV_A, 0);
73			ev_unref (EV_A);
74	root	1.5
75	root	1.6	l_release (EV_A);
76	root	1.5
77			return 0;
78	root	1.1	}
79
80	root	1.2	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	root	1.1	MODULE = EV::Loop::Async PACKAGE = EV::Loop::Async
91
92			PROTOTYPES: ENABLE
93
94			BOOT:
95			{
96			I_EV_API ("EV::Loop::Async");
97	root	1.3	CvNODEBUG_on (get_cv ("EV::Loop::Async::scope_lock", 0)); /* otherwise calling scope can be the debugger */
98	root	1.1	}
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	root	1.2	_attach (SV loop_, SV interrupt, IV sig_func, void *sig_arg)
109	root	1.1	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	root	1.2	u->interrupt = newSVsv (interrupt);
117	root	1.1	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	root	1.5	thread_create (&u->tid, l_run, loop);
135	root	1.1	}
136
137	root	1.2	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	root	1.1	void
150			lock (SV *loop_)
151			ALIAS:
152			lock = 0
153			unlock = 1
154	root	1.3	notify = 2
155	root	1.1	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	root	1.2	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	root	1.1	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	root	1.4	X_LOCK (u->lock);
192	root	1.1	ev_async_stop (loop, &u->async_w);
193	root	1.5	/* now thread is around blocking call, or in pthread_cond_wait */
194			pthread_cancel (u->tid);
195	root	1.1	pthread_mutex_destroy (&u->lock);
196			pthread_cond_destroy (&u->invoke_cv);
197	root	1.3	SvREFCNT_dec (u->interrupt);
198	root	1.1	Safefree (u);
199			}
200			}
201
202
203