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;
  mutex_t invoke_mutex;

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

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);
  X_UNLOCK (u->lock);
  u->signal_func (u->signal_arg, 1);
  X_COND_WAIT (u->invoke_cv, u->invoke_mutex);
  X_LOCK (u->lock);
}

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

  X_LOCK (u->invoke_mutex);
  X_LOCK (u->lock);
  ev_ref (loop); /* really? */
  for (;;) /* really? */
    ev_loop (loop, 0);
  X_UNLOCK (u->lock);
}

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_mutex_init (&u->invoke_mutex, &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);

        pthread_create (&u->tid, 0, 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);
            /* now thread is either in l_invoke, or around the blocking syscall */
            pthread_cancel (u->tid);
            pthread_join (u->tid, 0);
            ev_async_send (loop, &u->async_w);
            ev_async_stop (loop, &u->async_w);
            pthread_mutex_destroy (&u->lock);
            pthread_cond_destroy (&u->invoke_cv);
            pthread_mutex_destroy (&u->invoke_mutex); /* TODO: locked by another thread... */
            SvREFCNT_dec (u->interrupt);
            Safefree (u);
          }
}


Revision:	1.3
Committed:	Tue Jul 14 15:09:44 2009 UTC (15 years ago) by root
Branch:	MAIN
Changes since 1.2:	+8 -5 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			mutex_t invoke_mutex;
20
21	root	1.2	SV *interrupt;
22	root	1.1	} udat;
23
24			static void
25			c_func (pTHX_ void *loop_, int value)
26			{
27			struct ev_loop loop = (struct ev_loop )loop_;
28			udat *u = ev_userdata (EV_A);
29			X_LOCK (u->lock);
30			ev_invoke_pending (loop);
31			X_UNLOCK (u->lock);
32			X_COND_SIGNAL (u->invoke_cv);
33			}
34
35			static void
36			async_cb (EV_P_ ev_async *w, int revents)
37			{
38			/* just used for the side effects */
39			}
40
41			static void
42			l_release (EV_P)
43			{
44			udat *u = ev_userdata (EV_A);
45			X_UNLOCK (u->lock);
46			}
47
48			static void
49			l_acquire (EV_P)
50			{
51			udat *u = ev_userdata (EV_A);
52			X_LOCK (u->lock);
53			}
54
55			static void
56			l_invoke (EV_P)
57			{
58			udat *u = ev_userdata (EV_A);
59			X_UNLOCK (u->lock);
60			u->signal_func (u->signal_arg, 1);
61			X_COND_WAIT (u->invoke_cv, u->invoke_mutex);
62			X_LOCK (u->lock);
63			}
64
65			X_THREAD_PROC(l_run)
66			{
67			struct ev_loop loop = (struct ev_loop )thr_arg;
68			udat *u = ev_userdata (loop);
69
70			X_LOCK (u->invoke_mutex);
71			X_LOCK (u->lock);
72			ev_ref (loop); /* really? */
73			for (;;) /* really? */
74			ev_loop (loop, 0);
75			X_UNLOCK (u->lock);
76			}
77
78	root	1.2	static void
79			scope_lock_cb (pTHX_ void *loop_)
80			{
81			struct ev_loop loop = (struct ev_loop )SvIVX ((SV *)loop_);
82			udat *u = ev_userdata (loop);
83
84			X_UNLOCK (u->lock);
85			SvREFCNT_dec ((SV *)loop_);
86			}
87
88	root	1.1	MODULE = EV::Loop::Async PACKAGE = EV::Loop::Async
89
90			PROTOTYPES: ENABLE
91
92			BOOT:
93			{
94			I_EV_API ("EV::Loop::Async");
95	root	1.3	CvNODEBUG_on (get_cv ("EV::Loop::Async::scope_lock", 0)); /* otherwise calling scope can be the debugger */
96	root	1.1	}
97
98			void
99			_c_func (SV *loop)
100			PPCODE:
101			EXTEND (SP, 2);
102			PUSHs (sv_2mortal (newSViv (PTR2IV (c_func))));
103			PUSHs (sv_2mortal (newSViv (SvIVX (SvRV (loop)))));
104
105			void
106	root	1.2	_attach (SV loop_, SV interrupt, IV sig_func, void *sig_arg)
107	root	1.1	CODE:
108			{
109			pthread_mutexattr_t ma;
110			struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
111			udat *u;
112
113			Newz (0, u, 1, udat);
114	root	1.2	u->interrupt = newSVsv (interrupt);
115	root	1.1	u->signal_func = (void ()(void , int))sig_func;
116			u->signal_arg = sig_arg;
117
118			ev_async_init (&u->async_w, async_cb);
119			ev_async_start (loop, &u->async_w);
120
121			pthread_mutexattr_init (&ma);
122			pthread_mutexattr_settype (&ma, PTHREAD_MUTEX_RECURSIVE);
123			pthread_mutex_init (&u->lock, &ma);
124			pthread_mutex_init (&u->invoke_mutex, &ma);
125			pthread_mutexattr_destroy (&ma);
126
127			pthread_cond_init (&u->invoke_cv, 0);
128
129			ev_set_userdata (loop, u);
130			ev_set_invoke_pending_cb (loop, l_invoke);
131			ev_set_loop_release_cb (loop, l_release, l_acquire);
132
133	root	1.3	pthread_create (&u->tid, 0, l_run, loop);
134	root	1.1	}
135
136	root	1.2	SV *
137			interrupt (SV *loop_)
138			CODE:
139			{
140			struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
141			udat *u = ev_userdata (loop);
142
143			RETVAL = newSVsv (u->interrupt);
144			}
145			OUTPUT:
146			RETVAL
147
148	root	1.1	void
149			lock (SV *loop_)
150			ALIAS:
151			lock = 0
152			unlock = 1
153	root	1.3	notify = 2
154	root	1.1	CODE:
155			{
156			struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
157			udat *u = ev_userdata (loop);
158
159			switch (ix)
160			{
161			case 0: X_LOCK (u->lock); break;
162			case 1: X_UNLOCK (u->lock); break;
163			case 2: ev_async_send (loop, &u->async_w); break;
164			}
165			}
166
167			void
168	root	1.2	scope_lock (SV *loop_)
169			CODE:
170			{
171			struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
172			udat *u = ev_userdata (loop);
173
174			X_LOCK (u->lock);
175
176			LEAVE; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
177			SAVEDESTRUCTOR_X (scope_lock_cb, (void *)SvREFCNT_inc (SvRV (loop_)));
178			ENTER; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
179			}
180
181			void
182	root	1.1	DESTROY (SV *loop_)
183			CODE:
184			{
185			struct ev_loop loop = (struct ev_loop )SvIVX (SvRV (loop_));
186			udat *u = ev_userdata (loop);
187
188			if (u)
189			{
190			X_LOCK (u->lock);
191	root	1.3	/* now thread is either in l_invoke, or around the blocking syscall */
192			pthread_cancel (u->tid);
193			pthread_join (u->tid, 0);
194	root	1.1	ev_async_send (loop, &u->async_w);
195			ev_async_stop (loop, &u->async_w);
196			pthread_mutex_destroy (&u->lock);
197			pthread_cond_destroy (&u->invoke_cv);
198	root	1.3	pthread_mutex_destroy (&u->invoke_mutex); /* TODO: locked by another thread... */
199			SvREFCNT_dec (u->interrupt);
200	root	1.1	Safefree (u);
201			}
202			}
203
204
205