[ViewVC] Diff of: cvs/Async-Interrupt/Interrupt.xs

Comparing Async-Interrupt/Interrupt.xs (file contents):
Revision 1.10 by root, Fri Jul 17 03:32:29 2009 UTC vs.
Revision 1.19 by root, Tue Apr 24 22:01:59 2012 UTC

…		…
1	#include "EXTERN.h"	1	#include "EXTERN.h"
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
4		4
		5	#include "ecb.h"
5	#include "schmorp.h"	6	#include "schmorp.h"
6		7
7	typedef volatile sig_atomic_t atomic_t;	8	typedef volatile sig_atomic_t atomic_t;
8		9
9	static int sig_pending, psig_pend; /* make local copies because of missing THX */	10	static int sig_pending, psig_pend; /* make local copies because of missing THX */
31	void (c_cb)(pTHX_ void c_arg, int value);	32	void (c_cb)(pTHX_ void c_arg, int value);
32	void *c_arg;	33	void *c_arg;
33	SV fh_r, fh_w;	34	SV fh_r, fh_w;
34	SV *value;	35	SV *value;
35	int signum;	36	int signum;
		37	int autodrain;
		38	ANY *scope_savestack;
36	volatile int blocked;	39	volatile int blocked;
37		40
38	s_epipe ep;	41	s_epipe ep;
39	int fd_wlen;	42	int fd_wlen;
40	atomic_t fd_enable;	43	atomic_t fd_enable;
41	atomic_t pending;	44	atomic_t pending;
42	volatile IV *valuep;	45	volatile IV *valuep;
		46	atomic_t hysteresis;
43	} async_t;	47	} async_t;
44		48
45	static AV *asyncs;	49	static AV *asyncs;
46	static async_t *sig_async [SIG_SIZE];	50	static async_t *sig_async [SIG_SIZE];
47		51
48	#define SvASYNC_nrv(sv) INT2PTR (async_t *, SvIVX (sv))	52	#define SvASYNC_nrv(sv) INT2PTR (async_t *, SvIVX (sv))
49	#define SvASYNC(rv) SvASYNC_nrv (SvRV (rv))	53	#define SvASYNC(rv) SvASYNC_nrv (SvRV (rv))
50		54
		55	static void async_signal (void *signal_arg, int value);
		56
		57	static void
		58	setsig (int signum, void (*handler)(int))
		59	{
		60	#if _WIN32
		61	signal (signum, handler);
		62	#else
		63	struct sigaction sa;
		64	sa.sa_handler = handler;
		65	sigfillset (&sa.sa_mask);
		66	sa.sa_flags = 0; /* if we interrupt a syscall, we might drain the pipe before it became ready */
		67	sigaction (signum, &sa, 0);
		68	#endif
		69	}
		70
		71	static void
		72	async_sigsend (int signum)
		73	{
		74	async_signal (sig_async [signum], 0);
		75	}
		76
51	/* the main workhorse to signal */	77	/* the main workhorse to signal */
52	static void	78	static void
53	async_signal (void *signal_arg, int value)	79	async_signal (void *signal_arg, int value)
54	{	80	{
55	static char pipedata [8];	81	static char pipedata [8];
56		82
57	async_t async = (async_t )signal_arg;	83	async_t async = (async_t )signal_arg;
58	int pending = async->pending;	84	int pending = async->pending;
59		85
		86	if (async->hysteresis)
		87	setsig (async->signum, SIG_IGN);
		88
60	*async->valuep = value ? value : 1;	89	*async->valuep = value ? value : 1;
		90	ECB_MEMORY_FENCE_RELEASE;
61	async->pending = 1;	91	async->pending = 1;
		92	ECB_MEMORY_FENCE_RELEASE;
62	async_pending = 1;	93	async_pending = 1;
		94	ECB_MEMORY_FENCE_RELEASE;
		95
		96	if (!async->blocked)
		97	{
63	psig_pend [9] = 1;	98	psig_pend [9] = 1;
		99	ECB_MEMORY_FENCE_RELEASE;
64	*sig_pending = 1;	100	*sig_pending = 1;
		101	ECB_MEMORY_FENCE_RELEASE;
		102	}
65		103
66	if (!pending && async->fd_enable && async->ep.len)	104	if (!pending && async->fd_enable && async->ep.len)
67	s_epipe_signal (&async->ep);	105	s_epipe_signal (&async->ep);
68	}	106	}
69		107
…		…
74	int value = *async->valuep;	112	int value = *async->valuep;
75		113
76	*async->valuep = 0;	114	*async->valuep = 0;
77	async->pending = 0;	115	async->pending = 0;
78		116
		117	/* restore signal */
		118	if (async->hysteresis)
		119	setsig (async->signum, async_sigsend);
		120
79	/* drain pipe */	121	/* drain pipe */
80	if (async->fd_enable && async->ep.len)	122	if (async->fd_enable && async->ep.len && async->autodrain)
81	s_epipe_drain (&async->ep);	123	s_epipe_drain (&async->ep);
82		124
83	if (async->c_cb)	125	if (async->c_cb)
84	{	126	{
85	dTHX;	127	dTHX;
…		…
131	static void	173	static void
132	handle_asyncs (void)	174	handle_asyncs (void)
133	{	175	{
134	int i;	176	int i;
135		177
		178	ECB_MEMORY_FENCE_ACQUIRE;
		179
136	async_pending = 0;	180	async_pending = 0;
137		181
138	for (i = AvFILLp (asyncs); i >= 0; --i)	182	for (i = AvFILLp (asyncs); i >= 0; --i)
139	{	183	{
		184	SV *async_sv = AvARRAY (asyncs)[i];
140	async_t *async = SvASYNC_nrv (AvARRAY (asyncs)[i]);	185	async_t *async = SvASYNC_nrv (async_sv);
141		186
142	if (async->pending && !async->blocked)	187	if (async->pending && !async->blocked)
		188	{
		189	/* temporarily keep a refcount */
		190	SvREFCNT_inc (async_sv);
143	handle_async (async);	191	handle_async (async);
		192	SvREFCNT_dec (async_sv);
		193
		194	/* the handler could have deleted any number of asyncs */
		195	if (i > AvFILLp (asyncs))
		196	i = AvFILLp (asyncs);
		197	}
144	}	198	}
145	}	199	}
146		200
147	#if HAS_SA_SIGINFO	201	#if HAS_SA_SIGINFO
148	static Signal_t async_sighandler (int signum, siginfo_t si, void sarg)	202	static Signal_t async_sighandler (int signum, siginfo_t si, void sarg)
…		…
160	else	214	else
161	old_sighandler (signum);	215	old_sighandler (signum);
162	}	216	}
163	#endif	217	#endif
164		218
165	static void
166	async_sigsend (int signum)
167	{
168	async_signal (sig_async [signum], 0);
169	}
170
171	#define block(async) ++(async)->blocked	219	#define block(async) ++(async)->blocked
172		220
173	static void	221	static void
174	unblock (async_t *async)	222	unblock (async_t *async)
175	{	223	{
…		…
180		228
181	static void	229	static void
182	scope_block_cb (pTHX_ void *async_sv)	230	scope_block_cb (pTHX_ void *async_sv)
183	{	231	{
184	async_t async = SvASYNC_nrv ((SV )async_sv);	232	async_t async = SvASYNC_nrv ((SV )async_sv);
		233
		234	async->scope_savestack = 0;
185	unblock (async);	235	unblock (async);
186	SvREFCNT_dec (async_sv);	236	SvREFCNT_dec (async_sv);
		237	}
		238
		239	static void
		240	scope_block (SV *async_sv)
		241	{
		242	async_t *async = SvASYNC_nrv (async_sv);
		243
		244	/* as a heuristic, we skip the scope block if we already are blocked */
		245	/* and the existing scope block used the same savestack */
		246
		247	if (!async->scope_savestack \|\| async->scope_savestack != PL_savestack)
		248	{
		249	async->scope_savestack = PL_savestack;
		250	block (async);
		251
		252	LEAVE; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
		253	SAVEDESTRUCTOR_X (scope_block_cb, (void *)SvREFCNT_inc (async_sv));
		254	ENTER; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
		255	}
187	}	256	}
188		257
189	MODULE = Async::Interrupt PACKAGE = Async::Interrupt	258	MODULE = Async::Interrupt PACKAGE = Async::Interrupt
190		259
191	BOOT:	260	BOOT:
…		…
201	void	270	void
202	_alloc (SV cb, void c_cb, void c_arg, SV fh_r, SV fh_w, SV signl, SV *pvalue)	271	_alloc (SV cb, void c_cb, void c_arg, SV fh_r, SV fh_w, SV signl, SV *pvalue)
203	PPCODE:	272	PPCODE:
204	{	273	{
205	SV *cv = SvOK (cb) ? SvREFCNT_inc (s_get_cv_croak (cb)) : 0;	274	SV *cv = SvOK (cb) ? SvREFCNT_inc (s_get_cv_croak (cb)) : 0;
206	async_t *async;	275	async_t *async;
207		276
208	Newz (0, async, 1, async_t);	277	Newz (0, async, 1, async_t);
209		278
210	XPUSHs (sv_2mortal (newSViv (PTR2IV (async))));	279	XPUSHs (sv_2mortal (newSViv (PTR2IV (async))));
211	/* TODO: need to bless right now to ensure deallocation */	280	/* TODO: need to bless right now to ensure deallocation */
…		…
233	SvIOK_only (async->value); /* just to be sure */	302	SvIOK_only (async->value); /* just to be sure */
234	SvREADONLY_on (async->value);	303	SvREADONLY_on (async->value);
235		304
236	async->valuep = &(SvIVX (async->value));	305	async->valuep = &(SvIVX (async->value));
237		306
		307	async->autodrain = 1;
238	async->cb = cv;	308	async->cb = cv;
239	async->c_cb = c_cb;	309	async->c_cb = c_cb;
240	async->c_arg = c_arg;	310	async->c_arg = c_arg;
241	async->signum = SvOK (signl) ? s_signum_croak (signl) : 0;	311	async->signum = SvOK (signl) ? s_signum_croak (signl) : 0;
242		312
…		…
244	{	314	{
245	if (async->signum < 0)	315	if (async->signum < 0)
246	croak ("Async::Interrupt::new got passed illegal signal name or number: %s", SvPV_nolen (signl));	316	croak ("Async::Interrupt::new got passed illegal signal name or number: %s", SvPV_nolen (signl));
247		317
248	sig_async [async->signum] = async;	318	sig_async [async->signum] = async;
249	#if _WIN32
250	signal (async->signum, async_sigsend);	319	setsig (async->signum, async_sigsend);
251	#else
252	{
253	struct sigaction sa = { };
254	sa.sa_handler = async_sigsend;
255	sigfillset (&sa.sa_mask);
256	sigaction (async->signum, &sa, 0);
257	}
258	#endif
259	}	320	}
260	}	321	}
		322
		323	void
		324	signal_hysteresis (async_t *async, int enable)
		325	CODE:
		326	async->hysteresis = enable;
261		327
262	void	328	void
263	signal_func (async_t *async)	329	signal_func (async_t *async)
264	PPCODE:	330	PPCODE:
265	EXTEND (SP, 2);	331	EXTEND (SP, 2);
266	PUSHs (sv_2mortal (newSViv (PTR2IV (async_signal))));	332	PUSHs (sv_2mortal (newSViv (PTR2IV (async_signal))));
267	PUSHs (sv_2mortal (newSViv (PTR2IV (async))));	333	PUSHs (sv_2mortal (newSViv (PTR2IV (async))));
268		334
		335	void
		336	scope_block_func (SV *self)
		337	PPCODE:
		338	EXTEND (SP, 2);
		339	PUSHs (sv_2mortal (newSViv (PTR2IV (scope_block))));
		340	PUSHs (sv_2mortal (newSViv (PTR2IV (SvRV (self)))));
		341
269	IV	342	IV
270	c_var (async_t *async)	343	c_var (async_t *async)
271	CODE:	344	CODE:
272	RETVAL = PTR2IV (async->valuep);	345	RETVAL = PTR2IV (async->valuep);
273	OUTPUT:	346	OUTPUT:
274	RETVAL	347	RETVAL
275		348
276	void	349	void
		350	handle (async_t *async)
		351	CODE:
		352	handle_async (async);
		353
		354	void
277	signal (async_t *async, int value = 1)	355	signal (async_t *async, int value = 1)
278	CODE:	356	CODE:
279	async_signal (async, value);	357	async_signal (async, value);
280		358
281	void	359	void
…		…
289	unblock (async);	367	unblock (async);
290		368
291	void	369	void
292	scope_block (SV *self)	370	scope_block (SV *self)
293	CODE:	371	CODE:
294	{	372	scope_block (SvRV (self));
295	SV *async_sv = SvRV (self);
296	async_t *async = SvASYNC_nrv (async_sv);
297	block (async);
298
299	LEAVE; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
300	SAVEDESTRUCTOR_X (scope_block_cb, (void *)SvREFCNT_inc (async_sv));
301	ENTER; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
302	}
303		373
304	void	374	void
305	pipe_enable (async_t *async)	375	pipe_enable (async_t *async)
306	ALIAS:	376	ALIAS:
307	pipe_enable = 1	377	pipe_enable = 1
308	pipe_disable = 0	378	pipe_disable = 0
309	CODE:	379	CODE:
310	async->fd_enable = ix;	380	async->fd_enable = ix;
311		381
312	int	382	int
…		…
327		397
328	RETVAL = async->ep.fd [0];	398	RETVAL = async->ep.fd [0];
329	OUTPUT:	399	OUTPUT:
330	RETVAL	400	RETVAL
331		401
		402	int
		403	pipe_autodrain (async_t *async, int enable = -1)
		404	CODE:
		405	RETVAL = async->autodrain;
		406	if (enable >= 0)
		407	async->autodrain = enable;
		408	OUTPUT:
		409	RETVAL
		410
		411	void
		412	pipe_drain (async_t *async)
		413	CODE:
		414	if (async->ep.len)
		415	s_epipe_drain (&async->ep);
332		416
333	void	417	void
334	post_fork (async_t *async)	418	post_fork (async_t *async)
335	CODE:	419	CODE:
336	if (async->ep.len)	420	if (async->ep.len)
337	{	421	{
338	int res;	422	int res;
339		423
340	/block (async);//TODO/	424	/block (async);//TODO/
341	res = s_epipe_renew (&async->ep);	425	res = s_epipe_renew (&async->ep);
342	/unblock (async);//TODO/	426	/unblock (async);//TODO/
343		427
…		…
347		431
348	void	432	void
349	DESTROY (SV *self)	433	DESTROY (SV *self)
350	CODE:	434	CODE:
351	{	435	{
352	int i;	436	int i;
353	SV *async_sv = SvRV (self);	437	SV *async_sv = SvRV (self);
354	async_t *async = SvASYNC_nrv (async_sv);	438	async_t *async = SvASYNC_nrv (async_sv);
355		439
356	for (i = AvFILLp (asyncs); i >= 0; --i)	440	for (i = AvFILLp (asyncs); i >= 0; --i)
357	if (AvARRAY (asyncs)[i] == async_sv)	441	if (AvARRAY (asyncs)[i] == async_sv)
358	{	442	{
359	if (i < AvFILLp (asyncs))
360	AvARRAY (asyncs)[i] = AvARRAY (asyncs)[AvFILLp (asyncs)];	443	AvARRAY (asyncs)[i] = AvARRAY (asyncs)[AvFILLp (asyncs)];
361		444	av_pop (asyncs);
362	assert (av_pop (asyncs) == async_sv);
363	goto found;	445	goto found;
364	}	446	}
365		447
366	if (!PL_dirty)	448	if (!PL_dirty)
367	warn ("Async::Interrupt::DESTROY could not find async object in list of asyncs, please report");	449	warn ("Async::Interrupt::DESTROY could not find async object in list of asyncs, please report");
368		450
369	found:	451	found:
370		452
371	if (async->signum)	453	if (async->signum)
372	{
373	#if _WIN32
374	signal (async->signum, SIG_DFL);	454	setsig (async->signum, SIG_DFL);
375	#else
376	{
377	struct sigaction sa = { };
378	sa.sa_handler = SIG_DFL;
379	sigaction (async->signum, &sa, 0);
380	}
381	#endif
382	}
383		455
384	if (!async->fh_r && async->ep.len)	456	if (!async->fh_r && async->ep.len)
385	s_epipe_destroy (&async->ep);	457	s_epipe_destroy (&async->ep);
386		458
387	SvREFCNT_dec (async->fh_r);	459	SvREFCNT_dec (async->fh_r);
…		…
390	SvREFCNT_dec (async->value);	462	SvREFCNT_dec (async->value);
391		463
392	Safefree (async);	464	Safefree (async);
393	}	465	}
394		466
		467	SV *
		468	sig2num (SV *signame_or_number)
		469	ALIAS:
		470	sig2num = 0
		471	sig2name = 1
		472	PROTOTYPE: $
		473	CODE:
		474	{
		475	int signum = s_signum (signame_or_number);
		476
		477	if (signum < 0)
		478	RETVAL = &PL_sv_undef;
		479	else if (ix)
		480	RETVAL = newSVpv (PL_sig_name [signum], 0);
		481	else
		482	RETVAL = newSViv (signum);
		483	}
		484	OUTPUT:
		485	RETVAL
		486
		487	MODULE = Async::Interrupt PACKAGE = Async::Interrupt::EventPipe PREFIX = s_epipe_
		488
		489	void
		490	new (const char *klass)
		491	PPCODE:
		492	{
		493	s_epipe *epp;
		494
		495	Newz (0, epp, 1, s_epipe);
		496	XPUSHs (sv_setref_iv (sv_newmortal (), klass, PTR2IV (epp)));
		497
		498	if (s_epipe_new (epp) < 0)
		499	croak ("Async::Interrupt::EventPipe: unable to create new event pipe");
		500	}
		501
		502	void
		503	filenos (s_epipe *epp)
		504	PPCODE:
		505	EXTEND (SP, 2);
		506	PUSHs (sv_2mortal (newSViv (epp->fd [0])));
		507	PUSHs (sv_2mortal (newSViv (epp->fd [1])));
		508
		509	int
		510	fileno (s_epipe *epp)
		511	ALIAS:
		512	fileno = 0
		513	fileno_r = 0
		514	fileno_w = 1
		515	CODE:
		516	RETVAL = epp->fd [ix];
		517	OUTPUT:
		518	RETVAL
		519
		520	int
		521	type (s_epipe *epp)
		522	CODE:
		523	RETVAL = epp->len;
		524	OUTPUT:
		525	RETVAL
		526
		527	void
		528	s_epipe_signal (s_epipe *epp)
		529
		530	void
		531	s_epipe_drain (s_epipe *epp)
		532
		533	void
		534	signal_func (s_epipe *epp)
		535	ALIAS:
		536	drain_func = 1
		537	PPCODE:
		538	EXTEND (SP, 2);
		539	PUSHs (sv_2mortal (newSViv (PTR2IV (ix ? s_epipe_drain : s_epipe_signal))));
		540	PUSHs (sv_2mortal (newSViv (PTR2IV (epp))));
		541
		542	void
		543	s_epipe_wait (s_epipe *epp)
		544
		545	void
		546	DESTROY (s_epipe *epp)
		547	CODE:
		548	s_epipe_destroy (epp);
		549

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Comparing Async-Interrupt/Interrupt.xs (file contents): Revision 1.10 by root, Fri Jul 17 03:32:29 2009 UTC vs. Revision 1.19 by root, Tue Apr 24 22:01:59 2012 UTC

Diff Legend

Comparing Async-Interrupt/Interrupt.xs (file contents):
Revision 1.10 by root, Fri Jul 17 03:32:29 2009 UTC vs.
Revision 1.19 by root, Tue Apr 24 22:01:59 2012 UTC