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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.61 by root, Mon Oct 23 22:44:21 2006 UTC vs.
Revision 1.80 by root, Fri Oct 27 19:17:23 2006 UTC

		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
		5	# define _GNU_SOURCE
		6	#endif
		7
		8	/* just in case */
1	#define _REENTRANT 1	9	#define _REENTRANT 1
		10
2	#include <errno.h>	11	#include <errno.h>
3		12
4	#include "EXTERN.h"	13	#include "EXTERN.h"
5	#include "perl.h"	14	#include "perl.h"
6	#include "XSUB.h"	15	#include "XSUB.h"
…		…
39	/* used for struct dirent, AIX doesn't provide it */	48	/* used for struct dirent, AIX doesn't provide it */
40	#ifndef NAME_MAX	49	#ifndef NAME_MAX
41	# define NAME_MAX 4096	50	# define NAME_MAX 4096
42	#endif	51	#endif
43		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
		57
44	#if __ia64	58	#if __ia64
45	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
46	#else	62	#else
47	# define STACKSIZE 8192	63	# define STACKSIZE 16384
		64	#endif
		65
		66	/* wether word reads are potentially non-atomic.
		67	* this is conservatice, likely most arches this runs
		68	* on have atomic word read/writes.
		69	*/
		70	#ifndef WORDREAD_UNSAFE
		71	# if __i386 || __x86_64
		72	# define WORDREAD_UNSAFE 0
		73	# else
		74	# define WORDREAD_UNSAFE 1
48	#endif	75	# endif
		76	#endif
		77
		78	/* buffer size for various temporary buffers */
		79	#define AIO_BUFSIZE 65536
		80
		81	#define dBUF \
		82	char *aio_buf; \
		83	LOCK (wrklock); \
		84	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		85	UNLOCK (wrklock); \
		86	if (!aio_buf) \
		87	return -1;
49		88
50	enum {	89	enum {
51	REQ_QUIT,	90	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
…		…
56	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,	97	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,	98	REQ_LINK, REQ_SYMLINK,
60	REQ_GROUP, REQ_NOP,	99	REQ_GROUP, REQ_NOP,
61	REQ_SLEEP,	100	REQ_BUSY,
62	};	101	};
63		102
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	103	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	104	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		105
…		…
100	PRI_MIN = -4,	139	PRI_MIN = -4,
101	PRI_MAX = 4,	140	PRI_MAX = 4,
102		141
103	DEFAULT_PRI = 0,	142	DEFAULT_PRI = 0,
104	PRI_BIAS = -PRI_MIN,	143	PRI_BIAS = -PRI_MIN,
		144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
105	};	145	};
106		146
107	static int next_pri = DEFAULT_PRI + PRI_BIAS;	147	static int next_pri = DEFAULT_PRI + PRI_BIAS;
108		148
109	static int started, wanted;	149	static unsigned int started, wanted;
110	static volatile int nreqs;	150
111	static int max_outstanding = 1<<30;	151	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		152	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		153	#else
		154	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		155	#endif
		156
		157	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		158	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		159
		160	/* worker threads management */
		161	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		162
		163	typedef struct worker {
		164	/* locked by wrklock */
		165	struct worker *prev, *next;
		166
		167	pthread_t tid;
		168
		169	/* locked by reslock, reqlock or wrklock */
		170	aio_req req; /* currently processed request */
		171	void *dbuf;
		172	DIR *dirp;
		173	} worker;
		174
		175	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		176
		177	static void worker_clear (worker *wrk)
		178	{
		179	if (wrk->dirp)
		180	{
		181	closedir (wrk->dirp);
		182	wrk->dirp = 0;
		183	}
		184
		185	if (wrk->dbuf)
		186	{
		187	free (wrk->dbuf);
		188	wrk->dbuf = 0;
		189	}
		190	}
		191
		192	static void worker_free (worker *wrk)
		193	{
		194	wrk->next->prev = wrk->prev;
		195	wrk->prev->next = wrk->next;
		196
		197	free (wrk);
		198	}
		199
		200	static volatile unsigned int nreqs, nready, npending;
		201	static volatile unsigned int max_outstanding = 0xffffffff;
112	static int respipe [2];	202	static int respipe [2];
113		203
114	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
115	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
116	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
117		207
118	static volatile aio_req reqs, reqe; /* queue start, queue end */	208	#if WORDREAD_UNSAFE
119	static volatile aio_req ress, rese; /* queue start, queue end */
120		209
		210	static unsigned int get_nready ()
		211	{
		212	unsigned int retval;
		213
		214	LOCK (reqlock);
		215	retval = nready;
		216	UNLOCK (reqlock);
		217
		218	return retval;
		219	}
		220
		221	static unsigned int get_npending ()
		222	{
		223	unsigned int retval;
		224
		225	LOCK (reslock);
		226	retval = npending;
		227	UNLOCK (reslock);
		228
		229	return retval;
		230	}
		231
		232	#else
		233
		234	# define get_nready() nready
		235	# define get_npending() npending
		236
		237	#endif
		238
		239	/*
		240	* a somewhat faster data structure might be nice, but
		241	* with 8 priorities this actually needs <20 insns
		242	* per shift, the most expensive operation.
		243	*/
		244	typedef struct {
		245	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		246	int size;
		247	} reqq;
		248
		249	static reqq req_queue;
		250	static reqq res_queue;
		251
		252	int reqq_push (reqq *q, aio_req req)
		253	{
		254	int pri = req->pri;
		255	req->next = 0;
		256
		257	if (q->qe[pri])
		258	{
		259	q->qe[pri]->next = req;
		260	q->qe[pri] = req;
		261	}
		262	else
		263	q->qe[pri] = q->qs[pri] = req;
		264
		265	return q->size++;
		266	}
		267
		268	aio_req reqq_shift (reqq *q)
		269	{
		270	int pri;
		271
		272	if (!q->size)
		273	return 0;
		274
		275	--q->size;
		276
		277	for (pri = NUM_PRI; pri--; )
		278	{
		279	aio_req req = q->qs[pri];
		280
		281	if (req)
		282	{
		283	if (!(q->qs[pri] = req->next))
		284	q->qe[pri] = 0;
		285
		286	return req;
		287	}
		288	}
		289
		290	abort ();
		291	}
		292
		293	static int poll_cb (int max);
121	static void req_invoke (aio_req req);	294	static void req_invoke (aio_req req);
122	static void req_free (aio_req req);	295	static void req_free (aio_req req);
		296	static void req_cancel (aio_req req);
123		297
124	/* must be called at most once */	298	/* must be called at most once */
125	static SV *req_sv (aio_req req, const char *klass)	299	static SV *req_sv (aio_req req, const char *klass)
126	{	300	{
127	if (!req->self)	301	if (!req->self)
…		…
158	ENTER;	332	ENTER;
159	SAVETMPS;	333	SAVETMPS;
160	PUSHMARK (SP);	334	PUSHMARK (SP);
161	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	335	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
162	PUTBACK;	336	PUTBACK;
163	call_sv (grp->fh2, G_VOID | G_EVAL);	337	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
164	SPAGAIN;	338	SPAGAIN;
165	FREETMPS;	339	FREETMPS;
166	LEAVE;	340	LEAVE;
167	}	341	}
168		342
…		…
189	req_invoke (grp);	363	req_invoke (grp);
190	req_free (grp);	364	req_free (grp);
191	}	365	}
192	}	366	}
193		367
194	static void poll_wait ()
195	{
196	while (nreqs)
197	{
198	aio_req req;
199	pthread_mutex_lock (&reslock);
200	req = ress;
201	pthread_mutex_unlock (&reslock);
202
203	if (req)
204	return;
205
206	fd_set rfd;
207	FD_ZERO(&rfd);
208	FD_SET(respipe [0], &rfd);
209
210	select (respipe [0] + 1, &rfd, 0, 0, 0);
211	}
212	}
213
214	static void req_invoke (aio_req req)	368	static void req_invoke (aio_req req)
215	{	369	{
216	dSP;	370	dSP;
217	int errorno = errno;
218		371
219	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))	372	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
220	return;	373	{
221
222	errno = req->errorno;
223
224	ENTER;	374	ENTER;
225	SAVETMPS;	375	SAVETMPS;
226	PUSHMARK (SP);	376	PUSHMARK (SP);
227	EXTEND (SP, 1);	377	EXTEND (SP, 1);
228		378
229	switch (req->type)	379	switch (req->type)
230	{
231	case REQ_READDIR:
232	{	380	{
233	SV *rv = &PL_sv_undef;	381	case REQ_READDIR:
234
235	if (req->result >= 0)
236	{	382	{
237	char *buf = req->data2ptr;	383	SV *rv = &PL_sv_undef;
238	AV *av = newAV ();
239		384
240	while (req->result)	385	if (req->result >= 0)
241	{	386	{
		387	int i;
		388	char *buf = req->data2ptr;
		389	AV *av = newAV ();
		390
		391	av_extend (av, req->result - 1);
		392
		393	for (i = 0; i < req->result; ++i)
		394	{
242	SV *sv = newSVpv (buf, 0);	395	SV *sv = newSVpv (buf, 0);
243		396
244	av_push (av, sv);	397	av_store (av, i, sv);
245	buf += SvCUR (sv) + 1;	398	buf += SvCUR (sv) + 1;
246	req->result--;	399	}
		400
		401	rv = sv_2mortal (newRV_noinc ((SV *)av));
247	}	402	}
248		403
249	rv = sv_2mortal (newRV_noinc ((SV *)av));	404	PUSHs (rv);
250	}	405	}
		406	break;
251		407
252	PUSHs (rv);	408	case REQ_OPEN:
		409	{
		410	/* convert fd to fh */
		411	SV *fh;
		412
		413	PUSHs (sv_2mortal (newSViv (req->result)));
		414	PUTBACK;
		415	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		416	SPAGAIN;
		417
		418	fh = SvREFCNT_inc (POPs);
		419
		420	PUSHMARK (SP);
		421	XPUSHs (sv_2mortal (fh));
		422	}
		423	break;
		424
		425	case REQ_GROUP:
		426	req->fd = 2; /* mark group as finished */
		427
		428	if (req->data)
		429	{
		430	int i;
		431	AV *av = (AV *)req->data;
		432
		433	EXTEND (SP, AvFILL (av) + 1);
		434	for (i = 0; i <= AvFILL (av); ++i)
		435	PUSHs (*av_fetch (av, i, 0));
		436	}
		437	break;
		438
		439	case REQ_NOP:
		440	case REQ_BUSY:
		441	break;
		442
		443	default:
		444	PUSHs (sv_2mortal (newSViv (req->result)));
		445	break;
253	}	446	}
254	break;
255		447
256	case REQ_OPEN:	448	errno = req->errorno;
257	{
258	/* convert fd to fh */
259	SV *fh;
260		449
261	PUSHs (sv_2mortal (newSViv (req->result)));
262	PUTBACK;	450	PUTBACK;
263	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
264	SPAGAIN;
265
266	fh = SvREFCNT_inc (POPs);
267
268	PUSHMARK (SP);
269	XPUSHs (sv_2mortal (fh));
270	}
271	break;
272
273	case REQ_GROUP:
274	req->fd = 2; /* mark group as finished */
275
276	if (req->data)
277	{
278	int i;
279	AV *av = (AV *)req->data;
280
281	EXTEND (SP, AvFILL (av) + 1);
282	for (i = 0; i <= AvFILL (av); ++i)
283	PUSHs (*av_fetch (av, i, 0));
284	}
285	break;
286
287	case REQ_NOP:
288	case REQ_SLEEP:
289	break;
290
291	default:
292	PUSHs (sv_2mortal (newSViv (req->result)));
293	break;
294	}
295
296
297	PUTBACK;
298	call_sv (req->callback, G_VOID | G_EVAL);	451	call_sv (req->callback, G_VOID | G_EVAL);
299	SPAGAIN;	452	SPAGAIN;
300		453
301	FREETMPS;	454	FREETMPS;
302	LEAVE;	455	LEAVE;
303
304	errno = errorno;
305
306	if (SvTRUE (ERRSV))
307	{	456	}
308	req_free (req);
309	croak (0);
310	}
311	}
312		457
313	static void req_free (aio_req req)
314	{
315	if (req->grp)	458	if (req->grp)
316	{	459	{
317	aio_req grp = req->grp;	460	aio_req grp = req->grp;
318		461
319	/* unlink request */	462	/* unlink request */
…		…
324	grp->grp_first = req->grp_next;	467	grp->grp_first = req->grp_next;
325		468
326	aio_grp_dec (grp);	469	aio_grp_dec (grp);
327	}	470	}
328		471
		472	if (SvTRUE (ERRSV))
		473	{
		474	req_free (req);
		475	croak (0);
		476	}
		477	}
		478
		479	static void req_free (aio_req req)
		480	{
329	if (req->self)	481	if (req->self)
330	{	482	{
331	sv_unmagic (req->self, PERL_MAGIC_ext);	483	sv_unmagic (req->self, PERL_MAGIC_ext);
332	SvREFCNT_dec (req->self);	484	SvREFCNT_dec (req->self);
333	}	485	}
…		…
336	SvREFCNT_dec (req->fh);	488	SvREFCNT_dec (req->fh);
337	SvREFCNT_dec (req->fh2);	489	SvREFCNT_dec (req->fh2);
338	SvREFCNT_dec (req->callback);	490	SvREFCNT_dec (req->callback);
339	Safefree (req->statdata);	491	Safefree (req->statdata);
340		492
341	if (req->type == REQ_READDIR && req->result >= 0)	493	if (req->type == REQ_READDIR)
342	free (req->data2ptr);	494	free (req->data2ptr);
343		495
344	Safefree (req);	496	Safefree (req);
345	}	497	}
346		498
		499	static void req_cancel_subs (aio_req grp)
		500	{
		501	aio_req sub;
		502
		503	if (grp->type != REQ_GROUP)
		504	return;
		505
		506	SvREFCNT_dec (grp->fh2);
		507	grp->fh2 = 0;
		508
		509	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		510	req_cancel (sub);
		511	}
		512
347	static void req_cancel (aio_req req)	513	static void req_cancel (aio_req req)
348	{	514	{
349	req->flags |= FLAG_CANCELLED;	515	req->flags |= FLAG_CANCELLED;
350		516
351	if (req->type == REQ_GROUP)	517	req_cancel_subs (req);
352	{	518	}
353	aio_req sub;
354		519
355	for (sub = req->grp_first; sub; sub = sub->grp_next)	520	static void *aio_proc(void *arg);
356	req_cancel (sub);	521
		522	static void start_thread (void)
		523	{
		524	sigset_t fullsigset, oldsigset;
		525	pthread_attr_t attr;
		526
		527	worker *wrk = calloc (1, sizeof (worker));
		528
		529	if (!wrk)
		530	croak ("unable to allocate worker thread data");
		531
		532	pthread_attr_init (&attr);
		533	pthread_attr_setstacksize (&attr, STACKSIZE);
		534	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		535	#ifdef PTHREAD_SCOPE_PROCESS
		536	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		537	#endif
		538
		539	sigfillset (&fullsigset);
		540
		541	LOCK (wrklock);
		542	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
		543
		544	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
357	}	545	{
358	}	546	wrk->prev = &wrk_first;
		547	wrk->next = wrk_first.next;
		548	wrk_first.next->prev = wrk;
		549	wrk_first.next = wrk;
		550	++started;
		551	}
		552	else
		553	free (wrk);
359		554
		555	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		556	UNLOCK (wrklock);
		557	}
		558
		559	static void maybe_start_thread ()
		560	{
		561	#if 0
		562	static struct timeval last;
		563	struct timeval diff, now;
		564	#endif
		565
		566	if (started >= wanted)
		567	return;
		568
		569	if (nready <= nreqs - get_nready () - get_npending ())
		570	return;
		571
		572	#if 0
		573	gettimeofday (&now, 0);
		574
		575	diff.tv_sec = now.tv_sec - last.tv_sec;
		576	diff.tv_usec = now.tv_usec - last.tv_usec;
		577
		578	if (diff.tv_usec < 0)
		579	{
		580	--diff.tv_sec;
		581	diff.tv_usec += 1000000;
		582	}
		583
		584	if (!diff.tv_sec && diff.tv_usec < 10000)
		585	return;
		586
		587	last = now;
		588	#endif
		589
		590	start_thread ();
		591	}
		592
		593	static void req_send (aio_req req)
		594	{
		595	++nreqs;
		596
		597	LOCK (reqlock);
		598	++nready;
		599	reqq_push (&req_queue, req);
		600	pthread_cond_signal (&reqwait);
		601	UNLOCK (reqlock);
		602
		603	maybe_start_thread ();
		604	}
		605
		606	static void end_thread (void)
		607	{
		608	aio_req req;
		609
		610	Newz (0, req, 1, aio_cb);
		611
		612	req->type = REQ_QUIT;
		613	req->pri = PRI_MAX + PRI_BIAS;
		614
		615	req_send (req);
		616
		617	LOCK (wrklock);
		618	--started;
		619	UNLOCK (wrklock);
		620	}
		621
		622	static void min_parallel (int nthreads)
		623	{
		624	if (wanted < nthreads)
		625	wanted = nthreads;
		626	}
		627
		628	static void max_parallel (int nthreads)
		629	{
		630	if (wanted > nthreads)
		631	wanted = nthreads;
		632
		633	while (started > wanted)
		634	end_thread ();
		635	}
		636
		637	static void poll_wait ()
		638	{
		639	fd_set rfd;
		640
		641	while (nreqs)
		642	{
		643	int size;
		644	if (WORDREAD_UNSAFE) LOCK (reslock);
		645	size = res_queue.size;
		646	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		647
		648	if (size)
		649	return;
		650
		651	maybe_start_thread ();
		652
		653	FD_ZERO(&rfd);
		654	FD_SET(respipe [0], &rfd);
		655
		656	select (respipe [0] + 1, &rfd, 0, 0, 0);
		657	}
		658	}
		659
360	static int poll_cb ()	660	static int poll_cb (int max)
361	{	661	{
362	dSP;	662	dSP;
363	int count = 0;	663	int count = 0;
364	int do_croak = 0;	664	int do_croak = 0;
365	aio_req req;	665	aio_req req;
366		666
367	for (;;)	667	for (;;)
368	{	668	{
369	pthread_mutex_lock (&reslock);	669	while (max <= 0 || count < max)
370	req = ress;
371
372	if (req)
373	{	670	{
374	ress = req->next;	671	maybe_start_thread ();
375		672
		673	LOCK (reslock);
		674	req = reqq_shift (&res_queue);
		675
376	if (!ress)	676	if (req)
377	{	677	{
		678	--npending;
		679
		680	if (!res_queue.size)
		681	{
378	/* read any signals sent by the worker threads */	682	/* read any signals sent by the worker threads */
379	char buf [32];	683	char buf [32];
380	while (read (respipe [0], buf, 32) == 32)	684	while (read (respipe [0], buf, 32) == 32)
		685	;
381	;	686	}
382
383	rese = 0;
384	}	687	}
		688
		689	UNLOCK (reslock);
		690
		691	if (!req)
		692	break;
		693
		694	--nreqs;
		695
		696	if (req->type == REQ_GROUP && req->length)
		697	{
		698	req->fd = 1; /* mark request as delayed */
		699	continue;
		700	}
		701	else
		702	{
		703	if (req->type == REQ_READ)
		704	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		705
		706	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		707	SvREADONLY_off (req->data);
		708
		709	if (req->statdata)
		710	{
		711	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		712	PL_laststatval = req->result;
		713	PL_statcache = *(req->statdata);
		714	}
		715
		716	req_invoke (req);
		717
		718	count++;
		719	}
		720
		721	req_free (req);
385	}	722	}
386		723
387	pthread_mutex_unlock (&reslock);	724	if (nreqs <= max_outstanding)
388
389	if (!req)
390	break;	725	break;
391		726
392	--nreqs;	727	poll_wait ();
393		728
394	if (req->type == REQ_QUIT)	729	max = 0;
395	started--;
396	else if (req->type == REQ_GROUP && req->length)
397	{
398	req->fd = 1; /* mark request as delayed */
399	continue;
400	}
401	else
402	{
403	if (req->type == REQ_READ)
404	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
405
406	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
407	SvREADONLY_off (req->data);
408
409	if (req->statdata)
410	{
411	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
412	PL_laststatval = req->result;
413	PL_statcache = *(req->statdata);
414	}
415
416	req_invoke (req);
417
418	count++;
419	}
420
421	req_free (req);
422	}	730	}
423		731
424	return count;	732	return count;
425	}
426
427	static void *aio_proc(void *arg);
428
429	static void start_thread (void)
430	{
431	sigset_t fullsigset, oldsigset;
432	pthread_t tid;
433	pthread_attr_t attr;
434
435	pthread_attr_init (&attr);
436	pthread_attr_setstacksize (&attr, STACKSIZE);
437	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
438
439	sigfillset (&fullsigset);
440	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
441
442	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
443	started++;
444
445	sigprocmask (SIG_SETMASK, &oldsigset, 0);
446	}
447
448	static void req_send (aio_req req)
449	{
450	while (started < wanted && nreqs >= started)
451	start_thread ();
452
453	++nreqs;
454
455	pthread_mutex_lock (&reqlock);
456
457	req->next = 0;
458
459	if (reqe)
460	{
461	reqe->next = req;
462	reqe = req;
463	}
464	else
465	reqe = reqs = req;
466
467	pthread_cond_signal (&reqwait);
468	pthread_mutex_unlock (&reqlock);
469
470	if (nreqs > max_outstanding)
471	for (;;)
472	{
473	poll_cb ();
474
475	if (nreqs <= max_outstanding)
476	break;
477
478	poll_wait ();
479	}
480	}
481
482	static void end_thread (void)
483	{
484	aio_req req;
485	Newz (0, req, 1, aio_cb);
486	req->type = REQ_QUIT;
487
488	req_send (req);
489	}
490
491	static void min_parallel (int nthreads)
492	{
493	if (wanted < nthreads)
494	wanted = nthreads;
495	}
496
497	static void max_parallel (int nthreads)
498	{
499	int cur = started;
500
501	if (wanted > nthreads)
502	wanted = nthreads;
503
504	while (cur > wanted)
505	{
506	end_thread ();
507	cur--;
508	}
509
510	while (started > wanted)
511	{
512	poll_wait ();
513	poll_cb ();
514	}
515	}	733	}
516		734
517	static void create_pipe ()	735	static void create_pipe ()
518	{	736	{
519	if (pipe (respipe))	737	if (pipe (respipe))
…		…
543	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	761	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
544	{	762	{
545	ssize_t res;	763	ssize_t res;
546	off_t ooffset;	764	off_t ooffset;
547		765
548	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
549	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
550	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
551	res = read (fd, buf, count);	769	res = read (fd, buf, count);
552	lseek (fd, ooffset, SEEK_SET);	770	lseek (fd, ooffset, SEEK_SET);
553	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
554		772
555	return res;	773	return res;
556	}	774	}
557		775
558	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	776	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
559	{	777	{
560	ssize_t res;	778	ssize_t res;
561	off_t ooffset;	779	off_t ooffset;
562		780
563	pthread_mutex_lock (&preadwritelock);	781	LOCK (preadwritelock);
564	ooffset = lseek (fd, 0, SEEK_CUR);	782	ooffset = lseek (fd, 0, SEEK_CUR);
565	lseek (fd, offset, SEEK_SET);	783	lseek (fd, offset, SEEK_SET);
566	res = write (fd, buf, count);	784	res = write (fd, buf, count);
567	lseek (fd, offset, SEEK_SET);	785	lseek (fd, offset, SEEK_SET);
568	pthread_mutex_unlock (&preadwritelock);	786	UNLOCK (preadwritelock);
569		787
570	return res;	788	return res;
571	}	789	}
572	#endif	790	#endif
573		791
574	#if !HAVE_FDATASYNC	792	#if !HAVE_FDATASYNC
575	# define fdatasync fsync	793	# define fdatasync fsync
576	#endif	794	#endif
577		795
578	#if !HAVE_READAHEAD	796	#if !HAVE_READAHEAD
579	# define readahead aio_readahead	797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
580		798
581	static ssize_t readahead (int fd, off_t offset, size_t count)	799	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
582	{	800	{
583	char readahead_buf[4096];	801	dBUF;
584		802
585	while (count > 0)	803	while (count > 0)
586	{	804	{
587	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
588		806
589	pread (fd, readahead_buf, len, offset);	807	pread (fd, aio_buf, len, offset);
590	offset += len;	808	offset += len;
591	count -= len;	809	count -= len;
592	}	810	}
593		811
594	errno = 0;	812	errno = 0;
595	}	813	}
		814
596	#endif	815	#endif
597		816
598	#if !HAVE_READDIR_R	817	#if !HAVE_READDIR_R
599	# define readdir_r aio_readdir_r	818	# define readdir_r aio_readdir_r
600		819
…		…
603	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	822	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
604	{	823	{
605	struct dirent *e;	824	struct dirent *e;
606	int errorno;	825	int errorno;
607		826
608	pthread_mutex_lock (&readdirlock);	827	LOCK (readdirlock);
609		828
610	e = readdir (dirp);	829	e = readdir (dirp);
611	errorno = errno;	830	errorno = errno;
612		831
613	if (e)	832	if (e)
…		…
616	strcpy (ent->d_name, e->d_name);	835	strcpy (ent->d_name, e->d_name);
617	}	836	}
618	else	837	else
619	*res = 0;	838	*res = 0;
620		839
621	pthread_mutex_unlock (&readdirlock);	840	UNLOCK (readdirlock);
622		841
623	errno = errorno;	842	errno = errorno;
624	return e ? 0 : -1;	843	return e ? 0 : -1;
625	}	844	}
626	#endif	845	#endif
627		846
628	/* sendfile always needs emulation */	847	/* sendfile always needs emulation */
629	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	848	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
630	{	849	{
631	ssize_t res;	850	ssize_t res;
632		851
633	if (!count)	852	if (!count)
634	return 0;	853	return 0;
…		…
645	{	864	{
646	off_t sbytes;	865	off_t sbytes;
647	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
648		867
649	if (res < 0 && sbytes)	868	if (res < 0 && sbytes)
650	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
651	res = sbytes;	870	res = sbytes;
652	}	871	}
653		872
654	# elif __hpux	873	# elif __hpux
655	res = sendfile (ofd, ifd, offset, count, 0, 0);	874	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
683	#endif	902	#endif
684	)	903	)
685	)	904	)
686	{	905	{
687	/* emulate sendfile. this is a major pain in the ass */	906	/* emulate sendfile. this is a major pain in the ass */
688	char buf[4096];	907	dBUF;
		908
689	res = 0;	909	res = 0;
690		910
691	while (count)	911	while (count)
692	{	912	{
693	ssize_t cnt;	913	ssize_t cnt;
694		914
695	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
696		916
697	if (cnt <= 0)	917	if (cnt <= 0)
698	{	918	{
699	if (cnt && !res) res = -1;	919	if (cnt && !res) res = -1;
700	break;	920	break;
701	}	921	}
702		922
703	cnt = write (ofd, buf, cnt);	923	cnt = write (ofd, aio_buf, cnt);
704		924
705	if (cnt <= 0)	925	if (cnt <= 0)
706	{	926	{
707	if (cnt && !res) res = -1;	927	if (cnt && !res) res = -1;
708	break;	928	break;
…		…
716		936
717	return res;	937	return res;
718	}	938	}
719		939
720	/* read a full directory */	940	/* read a full directory */
721	static int scandir_ (const char *path, void **namesp)	941	static void scandir_ (aio_req req, worker *self)
722	{	942	{
723	DIR *dirp = opendir (path);	943	DIR *dirp;
724	union	944	union
725	{	945	{
726	struct dirent d;	946	struct dirent d;
727	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	947	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
728	} u;	948	} *u;
729	struct dirent *entp;	949	struct dirent *entp;
730	char *name, *names;	950	char *name, *names;
731	int memlen = 4096;	951	int memlen = 4096;
732	int memofs = 0;	952	int memofs = 0;
733	int res = 0;	953	int res = 0;
734	int errorno;	954	int errorno;
735		955
736	if (!dirp)	956	LOCK (wrklock);
737	return -1;	957	self->dirp = dirp = opendir (req->dataptr);
738		958	self->dbuf = u = malloc (sizeof (*u));
739	names = malloc (memlen);	959	req->data2ptr = names = malloc (memlen);
		960	UNLOCK (wrklock);
		961
		962	if (dirp && u && names)
		963	for (;;)
		964	{
		965	errno = 0;
		966	readdir_r (dirp, &u->d, &entp);
		967
		968	if (!entp)
		969	break;
		970
		971	name = entp->d_name;
		972
		973	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		974	{
		975	int len = strlen (name) + 1;
		976
		977	res++;
		978
		979	while (memofs + len > memlen)
		980	{
		981	memlen *= 2;
		982	LOCK (wrklock);
		983	req->data2ptr = names = realloc (names, memlen);
		984	UNLOCK (wrklock);
		985
		986	if (!names)
		987	break;
		988	}
		989
		990	memcpy (names + memofs, name, len);
		991	memofs += len;
		992	}
		993	}
		994
		995	if (errno)
		996	res = -1;
		997
		998	req->result = res;
		999	}
		1000
		1001	/*****************************************************************************/
		1002
		1003	static void *aio_proc (void *thr_arg)
		1004	{
		1005	aio_req req;
		1006	worker *self = (worker *)thr_arg;
740		1007
741	for (;;)	1008	for (;;)
742	{	1009	{
743	errno = 0, readdir_r (dirp, &u.d, &entp);	1010	LOCK (reqlock);
744
745	if (!entp)
746	break;
747
748	name = entp->d_name;
749
750	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
751	{
752	int len = strlen (name) + 1;
753
754	res++;
755
756	while (memofs + len > memlen)
757	{
758	memlen *= 2;
759	names = realloc (names, memlen);
760	if (!names)
761	break;
762	}
763
764	memcpy (names + memofs, name, len);
765	memofs += len;
766	}
767	}
768
769	errorno = errno;
770	closedir (dirp);
771
772	if (errorno)
773	{
774	free (names);
775	errno = errorno;
776	res = -1;
777	}
778
779	*namesp = (void *)names;
780	return res;
781	}
782
783	/*****************************************************************************/
784
785	static void *aio_proc (void *thr_arg)
786	{
787	aio_req req;
788	int type;
789
790	do
791	{
792	pthread_mutex_lock (&reqlock);
793		1011
794	for (;;)	1012	for (;;)
795	{	1013	{
796	req = reqs;	1014	self->req = req = reqq_shift (&req_queue);
797
798	if (reqs)
799	{
800	reqs = reqs->next;
801	if (!reqs) reqe = 0;
802	}
803		1015
804	if (req)	1016	if (req)
805	break;	1017	break;
806		1018
807	pthread_cond_wait (&reqwait, &reqlock);	1019	pthread_cond_wait (&reqwait, &reqlock);
808	}	1020	}
809		1021
810	pthread_mutex_unlock (&reqlock);	1022	--nready;
		1023
		1024	UNLOCK (reqlock);
811		1025
812	errno = 0; /* strictly unnecessary */	1026	errno = 0; /* strictly unnecessary */
813	type = req->type; /* remember type for QUIT check */
814		1027
815	if (!(req->flags & FLAG_CANCELLED))	1028	if (!(req->flags & FLAG_CANCELLED))
816	switch (type)	1029	switch (req->type)
817	{	1030	{
818	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1031	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
819	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1032	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
820		1033
821	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1034	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
822	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1035	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
823		1036
824	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
825	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
826	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
827		1040
…		…
833	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1046	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
834	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1047	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
835		1048
836	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1049	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
837	case REQ_FSYNC: req->result = fsync (req->fd); break;	1050	case REQ_FSYNC: req->result = fsync (req->fd); break;
838	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1051	case REQ_READDIR: scandir_ (req, self); break;
839		1052
840	case REQ_SLEEP:	1053	case REQ_BUSY:
841	{	1054	{
842	struct timeval tv;	1055	struct timeval tv;
843		1056
844	tv.tv_sec = req->fd;	1057	tv.tv_sec = req->fd;
845	tv.tv_usec = req->fd2;	1058	tv.tv_usec = req->fd2;
…		…
847	req->result = select (0, 0, 0, 0, &tv);	1060	req->result = select (0, 0, 0, 0, &tv);
848	}	1061	}
849		1062
850	case REQ_GROUP:	1063	case REQ_GROUP:
851	case REQ_NOP:	1064	case REQ_NOP:
		1065	break;
		1066
852	case REQ_QUIT:	1067	case REQ_QUIT:
		1068	LOCK (wrklock);
		1069	worker_free (self);
		1070	--started;
		1071	UNLOCK (wrklock);
853	break;	1072	return 0;
854		1073
855	default:	1074	default:
856	req->result = ENOSYS;	1075	req->result = ENOSYS;
857	break;	1076	break;
858	}	1077	}
859		1078
860	req->errorno = errno;	1079	req->errorno = errno;
861		1080
862	pthread_mutex_lock (&reslock);	1081	LOCK (reslock);
863		1082
864	req->next = 0;	1083	++npending;
865		1084
866	if (rese)	1085	if (!reqq_push (&res_queue, req))
867	{
868	rese->next = req;
869	rese = req;
870	}
871	else
872	{
873	rese = ress = req;
874
875	/* write a dummy byte to the pipe so fh becomes ready */	1086	/* write a dummy byte to the pipe so fh becomes ready */
876	write (respipe [1], &respipe, 1);	1087	write (respipe [1], &respipe, 1);
877	}
878		1088
879	pthread_mutex_unlock (&reslock);	1089	self->req = 0;
880	}	1090	worker_clear (self);
881	while (type != REQ_QUIT);
882		1091
883	return 0;	1092	UNLOCK (reslock);
		1093	}
884	}	1094	}
885		1095
886	/*****************************************************************************/	1096	/*****************************************************************************/
887		1097
888	static void atfork_prepare (void)	1098	static void atfork_prepare (void)
889	{	1099	{
890	pthread_mutex_lock (&reqlock);	1100	LOCK (wrklock);
891	pthread_mutex_lock (&reslock);	1101	LOCK (reqlock);
		1102	LOCK (reslock);
892	#if !HAVE_PREADWRITE	1103	#if !HAVE_PREADWRITE
893	pthread_mutex_lock (&preadwritelock);	1104	LOCK (preadwritelock);
894	#endif	1105	#endif
895	#if !HAVE_READDIR_R	1106	#if !HAVE_READDIR_R
896	pthread_mutex_lock (&readdirlock);	1107	LOCK (readdirlock);
897	#endif	1108	#endif
898	}	1109	}
899		1110
900	static void atfork_parent (void)	1111	static void atfork_parent (void)
901	{	1112	{
902	#if !HAVE_READDIR_R	1113	#if !HAVE_READDIR_R
903	pthread_mutex_unlock (&readdirlock);	1114	UNLOCK (readdirlock);
904	#endif	1115	#endif
905	#if !HAVE_PREADWRITE	1116	#if !HAVE_PREADWRITE
906	pthread_mutex_unlock (&preadwritelock);	1117	UNLOCK (preadwritelock);
907	#endif	1118	#endif
908	pthread_mutex_unlock (&reslock);	1119	UNLOCK (reslock);
909	pthread_mutex_unlock (&reqlock);	1120	UNLOCK (reqlock);
		1121	UNLOCK (wrklock);
910	}	1122	}
911		1123
912	static void atfork_child (void)	1124	static void atfork_child (void)
913	{	1125	{
914	aio_req prv;	1126	aio_req prv;
915		1127
		1128	while (prv = reqq_shift (&req_queue))
		1129	req_free (prv);
		1130
		1131	while (prv = reqq_shift (&res_queue))
		1132	req_free (prv);
		1133
		1134	while (wrk_first.next != &wrk_first)
		1135	{
		1136	worker *wrk = wrk_first.next;
		1137
		1138	if (wrk->req)
		1139	req_free (wrk->req);
		1140
		1141	worker_clear (wrk);
		1142	worker_free (wrk);
		1143	}
		1144
916	started = 0;	1145	started = 0;
917		1146	nreqs = 0;
918	while (reqs)
919	{
920	prv = reqs;
921	reqs = prv->next;
922	req_free (prv);
923	}
924
925	reqs = reqe = 0;
926
927	while (ress)
928	{
929	prv = ress;
930	ress = prv->next;
931	req_free (prv);
932	}
933
934	ress = rese = 0;
935		1147
936	close (respipe [0]);	1148	close (respipe [0]);
937	close (respipe [1]);	1149	close (respipe [1]);
938	create_pipe ();	1150	create_pipe ();
939		1151
…		…
972	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1184	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
973	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1185	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
974		1186
975	create_pipe ();	1187	create_pipe ();
976	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1188	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
977	}
978		1189
		1190	start_thread ();
		1191	}
		1192
979	void	1193	void
980	min_parallel (nthreads)	1194	min_parallel (int nthreads)
981	int nthreads
982	PROTOTYPE: $	1195	PROTOTYPE: $
983		1196
984	void	1197	void
985	max_parallel (nthreads)	1198	max_parallel (int nthreads)
986	int nthreads
987	PROTOTYPE: $	1199	PROTOTYPE: $
988		1200
989	int	1201	int
990	max_outstanding (nreqs)	1202	max_outstanding (int maxreqs)
991	int nreqs	1203	PROTOTYPE: $
992	PROTOTYPE: $
993	CODE:	1204	CODE:
994	RETVAL = max_outstanding;	1205	RETVAL = max_outstanding;
995	max_outstanding = nreqs;	1206	max_outstanding = maxreqs;
		1207	OUTPUT:
		1208	RETVAL
996		1209
997	void	1210	void
998	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1211	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
999	SV * pathname	1212	SV * pathname
1000	int flags	1213	int flags
…		…
1215		1428
1216	REQ_SEND;	1429	REQ_SEND;
1217	}	1430	}
1218		1431
1219	void	1432	void
1220	aio_sleep (delay,callback=&PL_sv_undef)	1433	aio_busy (delay,callback=&PL_sv_undef)
1221	double delay	1434	double delay
1222	SV * callback	1435	SV * callback
1223	PPCODE:	1436	PPCODE:
1224	{	1437	{
1225	dREQ;	1438	dREQ;
1226		1439
1227	req->type = REQ_SLEEP;	1440	req->type = REQ_BUSY;
1228	req->fd = delay < 0. ? 0 : delay;	1441	req->fd = delay < 0. ? 0 : delay;
1229	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1442	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1230		1443
1231	REQ_SEND;	1444	REQ_SEND;
1232	}	1445	}
…		…
1255	req->type = REQ_NOP;	1468	req->type = REQ_NOP;
1256		1469
1257	REQ_SEND;	1470	REQ_SEND;
1258	}	1471	}
1259		1472
1260	#if 0	1473	int
1261		1474	aioreq_pri (int pri = 0)
1262	void	1475	PROTOTYPE: ;$
1263	aio_pri (int pri = DEFAULT_PRI)
1264	CODE:	1476	CODE:
		1477	RETVAL = next_pri - PRI_BIAS;
		1478	if (items > 0)
		1479	{
1265	if (pri < PRI_MIN) pri = PRI_MIN;	1480	if (pri < PRI_MIN) pri = PRI_MIN;
1266	if (pri > PRI_MAX) pri = PRI_MAX;	1481	if (pri > PRI_MAX) pri = PRI_MAX;
1267	next_pri = pri + PRI_BIAS;	1482	next_pri = pri + PRI_BIAS;
		1483	}
		1484	OUTPUT:
		1485	RETVAL
1268		1486
1269	#endif	1487	void
		1488	aioreq_nice (int nice = 0)
		1489	CODE:
		1490	nice = next_pri - nice;
		1491	if (nice < PRI_MIN) nice = PRI_MIN;
		1492	if (nice > PRI_MAX) nice = PRI_MAX;
		1493	next_pri = nice + PRI_BIAS;
1270		1494
1271	void	1495	void
1272	flush ()	1496	flush ()
1273	PROTOTYPE:	1497	PROTOTYPE:
1274	CODE:	1498	CODE:
1275	while (nreqs)	1499	while (nreqs)
1276	{	1500	{
1277	poll_wait ();	1501	poll_wait ();
1278	poll_cb ();	1502	poll_cb (0);
1279	}	1503	}
1280		1504
1281	void	1505	void
1282	poll()	1506	poll()
1283	PROTOTYPE:	1507	PROTOTYPE:
1284	CODE:	1508	CODE:
1285	if (nreqs)	1509	if (nreqs)
1286	{	1510	{
1287	poll_wait ();	1511	poll_wait ();
1288	poll_cb ();	1512	poll_cb (0);
1289	}	1513	}
1290		1514
1291	int	1515	int
1292	poll_fileno()	1516	poll_fileno()
1293	PROTOTYPE:	1517	PROTOTYPE:
…		…
1298		1522
1299	int	1523	int
1300	poll_cb(...)	1524	poll_cb(...)
1301	PROTOTYPE:	1525	PROTOTYPE:
1302	CODE:	1526	CODE:
1303	RETVAL = poll_cb ();	1527	RETVAL = poll_cb (0);
		1528	OUTPUT:
		1529	RETVAL
		1530
		1531	int
		1532	poll_some(int max = 0)
		1533	PROTOTYPE: $
		1534	CODE:
		1535	RETVAL = poll_cb (max);
1304	OUTPUT:	1536	OUTPUT:
1305	RETVAL	1537	RETVAL
1306		1538
1307	void	1539	void
1308	poll_wait()	1540	poll_wait()
…		…
1317	CODE:	1549	CODE:
1318	RETVAL = nreqs;	1550	RETVAL = nreqs;
1319	OUTPUT:	1551	OUTPUT:
1320	RETVAL	1552	RETVAL
1321		1553
		1554	int
		1555	nready()
		1556	PROTOTYPE:
		1557	CODE:
		1558	RETVAL = get_nready ();
		1559	OUTPUT:
		1560	RETVAL
		1561
		1562	int
		1563	npending()
		1564	PROTOTYPE:
		1565	CODE:
		1566	RETVAL = get_npending ();
		1567	OUTPUT:
		1568	RETVAL
		1569
1322	PROTOTYPES: DISABLE	1570	PROTOTYPES: DISABLE
1323		1571
1324	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1572	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1325		1573
1326	void	1574	void
1327	cancel (aio_req_ornot req)	1575	cancel (aio_req_ornot req)
1328	PROTOTYPE:
1329	CODE:	1576	CODE:
1330	req_cancel (req);	1577	req_cancel (req);
1331		1578
1332	void	1579	void
1333	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1580	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
…		…
1369	}	1616	}
1370	}	1617	}
1371	}	1618	}
1372		1619
1373	void	1620	void
		1621	cancel_subs (aio_req_ornot req)
		1622	CODE:
		1623	req_cancel_subs (req);
		1624
		1625	void
1374	result (aio_req grp, ...)	1626	result (aio_req grp, ...)
1375	CODE:	1627	CODE:
1376	{	1628	{
1377	int i;	1629	int i;
		1630	AV *av;
		1631
		1632	grp->errorno = errno;
		1633
1378	AV *av = newAV ();	1634	av = newAV ();
1379		1635
1380	for (i = 1; i < items; ++i )	1636	for (i = 1; i < items; ++i )
1381	av_push (av, newSVsv (ST (i)));	1637	av_push (av, newSVsv (ST (i)));
1382		1638
1383	SvREFCNT_dec (grp->data);	1639	SvREFCNT_dec (grp->data);
1384	grp->data = (SV *)av;	1640	grp->data = (SV *)av;
1385	}	1641	}
1386		1642
1387	void	1643	void
		1644	errno (aio_req grp, int errorno = errno)
		1645	CODE:
		1646	grp->errorno = errorno;
		1647
		1648	void
1388	feed_limit (aio_req grp, int limit)	1649	limit (aio_req grp, int limit)
1389	CODE:	1650	CODE:
1390	grp->fd2 = limit;	1651	grp->fd2 = limit;
1391	aio_grp_feed (grp);	1652	aio_grp_feed (grp);
1392		1653
1393	void	1654	void

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