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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.64 by root, Mon Oct 23 23:54:41 2006 UTC vs.
Revision 1.81 by root, Fri Oct 27 20:10:06 2006 UTC

1	#if __linux	1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
2	# define _GNU_SOURCE	5	# define _GNU_SOURCE
3	#endif	6	#endif
4		7
		8	/* just in case */
5	#define _REENTRANT 1	9	#define _REENTRANT 1
6		10
7	#include <errno.h>	11	#include <errno.h>
8		12
9	#include "EXTERN.h"	13	#include "EXTERN.h"
…		…
44	/* used for struct dirent, AIX doesn't provide it */	48	/* used for struct dirent, AIX doesn't provide it */
45	#ifndef NAME_MAX	49	#ifndef NAME_MAX
46	# define NAME_MAX 4096	50	# define NAME_MAX 4096
47	#endif	51	#endif
48		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
		57
49	#if __ia64	58	#if __ia64
50	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
51	#else	62	#else
52	# 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
53	#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;
54		88
55	enum {	89	enum {
56	REQ_QUIT,	90	REQ_QUIT,
57	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
58	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
59	REQ_SENDFILE,	93	REQ_SENDFILE,
60	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
61	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
62	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
63	REQ_READDIR,	97	REQ_MKNOD, REQ_READDIR,
64	REQ_LINK, REQ_SYMLINK,	98	REQ_LINK, REQ_SYMLINK,
65	REQ_GROUP, REQ_NOP,	99	REQ_GROUP, REQ_NOP,
66	REQ_SLEEP,	100	REQ_BUSY,
67	};	101	};
68		102
69	#define AIO_REQ_KLASS "IO::AIO::REQ"	103	#define AIO_REQ_KLASS "IO::AIO::REQ"
70	#define AIO_GRP_KLASS "IO::AIO::GRP"	104	#define AIO_GRP_KLASS "IO::AIO::GRP"
71		105
…		…
105	PRI_MIN = -4,	139	PRI_MIN = -4,
106	PRI_MAX = 4,	140	PRI_MAX = 4,
107		141
108	DEFAULT_PRI = 0,	142	DEFAULT_PRI = 0,
109	PRI_BIAS = -PRI_MIN,	143	PRI_BIAS = -PRI_MIN,
		144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
110	};	145	};
111		146
112	static int next_pri = DEFAULT_PRI + PRI_BIAS;	147	static int next_pri = DEFAULT_PRI + PRI_BIAS;
113		148
114	static int started, wanted;	149	static unsigned int started, wanted;
115	static volatile int nreqs;
116	static int max_outstanding = 1<<30;
117	static int respipe [2];
118		150
119	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	151	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
120	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP	152	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
121	#else	153	#else
122	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER	154	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
123	#endif	155	#endif
124		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;
		202	static int respipe [2];
		203
125	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
126	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;	205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
127	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
128		207
129	static volatile aio_req reqs, reqe; /* queue start, queue end */	208	#if WORDREAD_UNSAFE
130	static volatile aio_req ress, rese; /* queue start, queue end */
131		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);
132	static void req_invoke (aio_req req);	294	static void req_invoke (aio_req req);
133	static void req_free (aio_req req);	295	static void req_free (aio_req req);
		296	static void req_cancel (aio_req req);
134		297
135	/* must be called at most once */	298	/* must be called at most once */
136	static SV *req_sv (aio_req req, const char *klass)	299	static SV *req_sv (aio_req req, const char *klass)
137	{	300	{
138	if (!req->self)	301	if (!req->self)
…		…
169	ENTER;	332	ENTER;
170	SAVETMPS;	333	SAVETMPS;
171	PUSHMARK (SP);	334	PUSHMARK (SP);
172	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	335	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
173	PUTBACK;	336	PUTBACK;
174	call_sv (grp->fh2, G_VOID | G_EVAL);	337	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
175	SPAGAIN;	338	SPAGAIN;
176	FREETMPS;	339	FREETMPS;
177	LEAVE;	340	LEAVE;
178	}	341	}
179		342
…		…
200	req_invoke (grp);	363	req_invoke (grp);
201	req_free (grp);	364	req_free (grp);
202	}	365	}
203	}	366	}
204		367
205	static void poll_wait ()
206	{
207	fd_set rfd;
208
209	while (nreqs)
210	{
211	aio_req req;
212	#if !(__x86 || __x86_64) /* safe without sempahore on this archs */
213	pthread_mutex_lock (&reslock);
214	#endif
215	req = ress;
216	#if !(__x86 || __x86_64) /* safe without sempahore on this archs */
217	pthread_mutex_unlock (&reslock);
218	#endif
219
220	if (req)
221	return;
222
223	FD_ZERO(&rfd);
224	FD_SET(respipe [0], &rfd);
225
226	select (respipe [0] + 1, &rfd, 0, 0, 0);
227	}
228	}
229
230	static void req_invoke (aio_req req)	368	static void req_invoke (aio_req req)
231	{	369	{
232	dSP;	370	dSP;
233	int errorno = errno;
234		371
235	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))	372	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
236	return;	373	{
237
238	errno = req->errorno;
239
240	ENTER;	374	ENTER;
241	SAVETMPS;	375	SAVETMPS;
242	PUSHMARK (SP);	376	PUSHMARK (SP);
243	EXTEND (SP, 1);	377	EXTEND (SP, 1);
244		378
245	switch (req->type)	379	switch (req->type)
246	{
247	case REQ_READDIR:
248	{	380	{
249	SV *rv = &PL_sv_undef;	381	case REQ_READDIR:
250
251	if (req->result >= 0)
252	{	382	{
253	char *buf = req->data2ptr;	383	SV *rv = &PL_sv_undef;
254	AV *av = newAV ();
255		384
256	while (req->result)	385	if (req->result >= 0)
257	{	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	{
258	SV *sv = newSVpv (buf, 0);	395	SV *sv = newSVpv (buf, 0);
259		396
260	av_push (av, sv);	397	av_store (av, i, sv);
261	buf += SvCUR (sv) + 1;	398	buf += SvCUR (sv) + 1;
262	req->result--;	399	}
		400
		401	rv = sv_2mortal (newRV_noinc ((SV *)av));
263	}	402	}
264		403
265	rv = sv_2mortal (newRV_noinc ((SV *)av));	404	PUSHs (rv);
266	}	405	}
		406	break;
267		407
268	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;
269	}	446	}
270	break;
271		447
272	case REQ_OPEN:	448	errno = req->errorno;
273	{
274	/* convert fd to fh */
275	SV *fh;
276		449
277	PUSHs (sv_2mortal (newSViv (req->result)));
278	PUTBACK;	450	PUTBACK;
279	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
280	SPAGAIN;
281
282	fh = SvREFCNT_inc (POPs);
283
284	PUSHMARK (SP);
285	XPUSHs (sv_2mortal (fh));
286	}
287	break;
288
289	case REQ_GROUP:
290	req->fd = 2; /* mark group as finished */
291
292	if (req->data)
293	{
294	int i;
295	AV *av = (AV *)req->data;
296
297	EXTEND (SP, AvFILL (av) + 1);
298	for (i = 0; i <= AvFILL (av); ++i)
299	PUSHs (*av_fetch (av, i, 0));
300	}
301	break;
302
303	case REQ_NOP:
304	case REQ_SLEEP:
305	break;
306
307	default:
308	PUSHs (sv_2mortal (newSViv (req->result)));
309	break;
310	}
311
312
313	PUTBACK;
314	call_sv (req->callback, G_VOID | G_EVAL);	451	call_sv (req->callback, G_VOID | G_EVAL);
315	SPAGAIN;	452	SPAGAIN;
316		453
317	FREETMPS;	454	FREETMPS;
318	LEAVE;	455	LEAVE;
319
320	errno = errorno;
321
322	if (SvTRUE (ERRSV))
323	{	456	}
324	req_free (req);
325	croak (0);
326	}
327	}
328		457
329	static void req_free (aio_req req)
330	{
331	if (req->grp)	458	if (req->grp)
332	{	459	{
333	aio_req grp = req->grp;	460	aio_req grp = req->grp;
334		461
335	/* unlink request */	462	/* unlink request */
…		…
340	grp->grp_first = req->grp_next;	467	grp->grp_first = req->grp_next;
341		468
342	aio_grp_dec (grp);	469	aio_grp_dec (grp);
343	}	470	}
344		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	{
345	if (req->self)	481	if (req->self)
346	{	482	{
347	sv_unmagic (req->self, PERL_MAGIC_ext);	483	sv_unmagic (req->self, PERL_MAGIC_ext);
348	SvREFCNT_dec (req->self);	484	SvREFCNT_dec (req->self);
349	}	485	}
…		…
352	SvREFCNT_dec (req->fh);	488	SvREFCNT_dec (req->fh);
353	SvREFCNT_dec (req->fh2);	489	SvREFCNT_dec (req->fh2);
354	SvREFCNT_dec (req->callback);	490	SvREFCNT_dec (req->callback);
355	Safefree (req->statdata);	491	Safefree (req->statdata);
356		492
357	if (req->type == REQ_READDIR && req->result >= 0)	493	if (req->type == REQ_READDIR)
358	free (req->data2ptr);	494	free (req->data2ptr);
359		495
360	Safefree (req);	496	Safefree (req);
361	}	497	}
362		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
363	static void req_cancel (aio_req req)	513	static void req_cancel (aio_req req)
364	{	514	{
365	req->flags |= FLAG_CANCELLED;	515	req->flags |= FLAG_CANCELLED;
366		516
367	if (req->type == REQ_GROUP)	517	req_cancel_subs (req);
368	{	518	}
369	aio_req sub;
370		519
371	for (sub = req->grp_first; sub; sub = sub->grp_next)	520	static void *aio_proc(void *arg);
372	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)
373	}	545	{
374	}	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);
375		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
376	static int poll_cb ()	660	static int poll_cb (int max)
377	{	661	{
378	dSP;	662	dSP;
379	int count = 0;	663	int count = 0;
380	int do_croak = 0;	664	int do_croak = 0;
381	aio_req req;	665	aio_req req;
382		666
383	for (;;)	667	for (;;)
384	{	668	{
385	pthread_mutex_lock (&reslock);	669	while (max <= 0 || count < max)
386	req = ress;
387
388	if (req)
389	{	670	{
390	ress = req->next;	671	maybe_start_thread ();
391		672
		673	LOCK (reslock);
		674	req = reqq_shift (&res_queue);
		675
392	if (!ress)	676	if (req)
393	{	677	{
		678	--npending;
		679
		680	if (!res_queue.size)
		681	{
394	/* read any signals sent by the worker threads */	682	/* read any signals sent by the worker threads */
395	char buf [32];	683	char buf [32];
396	while (read (respipe [0], buf, 32) == 32)	684	while (read (respipe [0], buf, 32) == 32)
		685	;
397	;	686	}
398
399	rese = 0;
400	}	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);
401	}	722	}
402		723
403	pthread_mutex_unlock (&reslock);	724	if (nreqs <= max_outstanding)
404
405	if (!req)
406	break;	725	break;
407		726
408	--nreqs;	727	poll_wait ();
409		728
410	if (req->type == REQ_QUIT)	729	max = 0;
411	started--;
412	else if (req->type == REQ_GROUP && req->length)
413	{
414	req->fd = 1; /* mark request as delayed */
415	continue;
416	}
417	else
418	{
419	if (req->type == REQ_READ)
420	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
421
422	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
423	SvREADONLY_off (req->data);
424
425	if (req->statdata)
426	{
427	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
428	PL_laststatval = req->result;
429	PL_statcache = *(req->statdata);
430	}
431
432	req_invoke (req);
433
434	count++;
435	}
436
437	req_free (req);
438	}	730	}
439		731
440	return count;	732	return count;
441	}
442
443	static void *aio_proc(void *arg);
444
445	static void start_thread (void)
446	{
447	sigset_t fullsigset, oldsigset;
448	pthread_t tid;
449	pthread_attr_t attr;
450
451	pthread_attr_init (&attr);
452	pthread_attr_setstacksize (&attr, STACKSIZE);
453	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
454
455	sigfillset (&fullsigset);
456	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
457
458	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
459	started++;
460
461	sigprocmask (SIG_SETMASK, &oldsigset, 0);
462	}
463
464	static void req_send (aio_req req)
465	{
466	while (started < wanted && nreqs >= started)
467	start_thread ();
468
469	++nreqs;
470
471	pthread_mutex_lock (&reqlock);
472
473	req->next = 0;
474
475	if (reqe)
476	{
477	reqe->next = req;
478	reqe = req;
479	}
480	else
481	reqe = reqs = req;
482
483	pthread_cond_signal (&reqwait);
484	pthread_mutex_unlock (&reqlock);
485
486	if (nreqs > max_outstanding)
487	for (;;)
488	{
489	poll_cb ();
490
491	if (nreqs <= max_outstanding)
492	break;
493
494	poll_wait ();
495	}
496	}
497
498	static void end_thread (void)
499	{
500	aio_req req;
501	Newz (0, req, 1, aio_cb);
502	req->type = REQ_QUIT;
503
504	req_send (req);
505	}
506
507	static void min_parallel (int nthreads)
508	{
509	if (wanted < nthreads)
510	wanted = nthreads;
511	}
512
513	static void max_parallel (int nthreads)
514	{
515	int cur = started;
516
517	if (wanted > nthreads)
518	wanted = nthreads;
519
520	while (cur > wanted)
521	{
522	end_thread ();
523	cur--;
524	}
525
526	while (started > wanted)
527	{
528	poll_wait ();
529	poll_cb ();
530	}
531	}	733	}
532		734
533	static void create_pipe ()	735	static void create_pipe ()
534	{	736	{
535	if (pipe (respipe))	737	if (pipe (respipe))
…		…
559	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)
560	{	762	{
561	ssize_t res;	763	ssize_t res;
562	off_t ooffset;	764	off_t ooffset;
563		765
564	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
565	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
566	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
567	res = read (fd, buf, count);	769	res = read (fd, buf, count);
568	lseek (fd, ooffset, SEEK_SET);	770	lseek (fd, ooffset, SEEK_SET);
569	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
570		772
571	return res;	773	return res;
572	}	774	}
573		775
574	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)
575	{	777	{
576	ssize_t res;	778	ssize_t res;
577	off_t ooffset;	779	off_t ooffset;
578		780
579	pthread_mutex_lock (&preadwritelock);	781	LOCK (preadwritelock);
580	ooffset = lseek (fd, 0, SEEK_CUR);	782	ooffset = lseek (fd, 0, SEEK_CUR);
581	lseek (fd, offset, SEEK_SET);	783	lseek (fd, offset, SEEK_SET);
582	res = write (fd, buf, count);	784	res = write (fd, buf, count);
583	lseek (fd, offset, SEEK_SET);	785	lseek (fd, offset, SEEK_SET);
584	pthread_mutex_unlock (&preadwritelock);	786	UNLOCK (preadwritelock);
585		787
586	return res;	788	return res;
587	}	789	}
588	#endif	790	#endif
589		791
590	#if !HAVE_FDATASYNC	792	#if !HAVE_FDATASYNC
591	# define fdatasync fsync	793	# define fdatasync fsync
592	#endif	794	#endif
593		795
594	#if !HAVE_READAHEAD	796	#if !HAVE_READAHEAD
595	# define readahead aio_readahead	797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
596		798
597	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)
598	{	800	{
599	char readahead_buf[4096];	801	dBUF;
600		802
601	while (count > 0)	803	while (count > 0)
602	{	804	{
603	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
604		806
605	pread (fd, readahead_buf, len, offset);	807	pread (fd, aio_buf, len, offset);
606	offset += len;	808	offset += len;
607	count -= len;	809	count -= len;
608	}	810	}
609		811
610	errno = 0;	812	errno = 0;
611	}	813	}
		814
612	#endif	815	#endif
613		816
614	#if !HAVE_READDIR_R	817	#if !HAVE_READDIR_R
615	# define readdir_r aio_readdir_r	818	# define readdir_r aio_readdir_r
616		819
…		…
619	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)
620	{	823	{
621	struct dirent *e;	824	struct dirent *e;
622	int errorno;	825	int errorno;
623		826
624	pthread_mutex_lock (&readdirlock);	827	LOCK (readdirlock);
625		828
626	e = readdir (dirp);	829	e = readdir (dirp);
627	errorno = errno;	830	errorno = errno;
628		831
629	if (e)	832	if (e)
…		…
632	strcpy (ent->d_name, e->d_name);	835	strcpy (ent->d_name, e->d_name);
633	}	836	}
634	else	837	else
635	*res = 0;	838	*res = 0;
636		839
637	pthread_mutex_unlock (&readdirlock);	840	UNLOCK (readdirlock);
638		841
639	errno = errorno;	842	errno = errorno;
640	return e ? 0 : -1;	843	return e ? 0 : -1;
641	}	844	}
642	#endif	845	#endif
643		846
644	/* sendfile always needs emulation */	847	/* sendfile always needs emulation */
645	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)
646	{	849	{
647	ssize_t res;	850	ssize_t res;
648		851
649	if (!count)	852	if (!count)
650	return 0;	853	return 0;
…		…
661	{	864	{
662	off_t sbytes;	865	off_t sbytes;
663	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
664		867
665	if (res < 0 && sbytes)	868	if (res < 0 && sbytes)
666	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
667	res = sbytes;	870	res = sbytes;
668	}	871	}
669		872
670	# elif __hpux	873	# elif __hpux
671	res = sendfile (ofd, ifd, offset, count, 0, 0);	874	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
699	#endif	902	#endif
700	)	903	)
701	)	904	)
702	{	905	{
703	/* emulate sendfile. this is a major pain in the ass */	906	/* emulate sendfile. this is a major pain in the ass */
704	char buf[4096];	907	dBUF;
		908
705	res = 0;	909	res = 0;
706		910
707	while (count)	911	while (count)
708	{	912	{
709	ssize_t cnt;	913	ssize_t cnt;
710		914
711	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
712		916
713	if (cnt <= 0)	917	if (cnt <= 0)
714	{	918	{
715	if (cnt && !res) res = -1;	919	if (cnt && !res) res = -1;
716	break;	920	break;
717	}	921	}
718		922
719	cnt = write (ofd, buf, cnt);	923	cnt = write (ofd, aio_buf, cnt);
720		924
721	if (cnt <= 0)	925	if (cnt <= 0)
722	{	926	{
723	if (cnt && !res) res = -1;	927	if (cnt && !res) res = -1;
724	break;	928	break;
…		…
732		936
733	return res;	937	return res;
734	}	938	}
735		939
736	/* read a full directory */	940	/* read a full directory */
737	static int scandir_ (const char *path, void **namesp)	941	static void scandir_ (aio_req req, worker *self)
738	{	942	{
739	DIR *dirp = opendir (path);	943	DIR *dirp;
740	union	944	union
741	{	945	{
742	struct dirent d;	946	struct dirent d;
743	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	947	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
744	} u;	948	} *u;
745	struct dirent *entp;	949	struct dirent *entp;
746	char *name, *names;	950	char *name, *names;
747	int memlen = 4096;	951	int memlen = 4096;
748	int memofs = 0;	952	int memofs = 0;
749	int res = 0;	953	int res = 0;
750	int errorno;	954	int errorno;
751		955
752	if (!dirp)	956	LOCK (wrklock);
753	return -1;	957	self->dirp = dirp = opendir (req->dataptr);
754		958	self->dbuf = u = malloc (sizeof (*u));
755	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;
756		1007
757	for (;;)	1008	for (;;)
758	{	1009	{
759	errno = 0, readdir_r (dirp, &u.d, &entp);	1010	LOCK (reqlock);
760
761	if (!entp)
762	break;
763
764	name = entp->d_name;
765
766	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
767	{
768	int len = strlen (name) + 1;
769
770	res++;
771
772	while (memofs + len > memlen)
773	{
774	memlen *= 2;
775	names = realloc (names, memlen);
776	if (!names)
777	break;
778	}
779
780	memcpy (names + memofs, name, len);
781	memofs += len;
782	}
783	}
784
785	errorno = errno;
786	closedir (dirp);
787
788	if (errorno)
789	{
790	free (names);
791	errno = errorno;
792	res = -1;
793	}
794
795	*namesp = (void *)names;
796	return res;
797	}
798
799	/*****************************************************************************/
800
801	static void *aio_proc (void *thr_arg)
802	{
803	aio_req req;
804	int type;
805
806	do
807	{
808	pthread_mutex_lock (&reqlock);
809		1011
810	for (;;)	1012	for (;;)
811	{	1013	{
812	req = reqs;	1014	self->req = req = reqq_shift (&req_queue);
813
814	if (reqs)
815	{
816	reqs = reqs->next;
817	if (!reqs) reqe = 0;
818	}
819		1015
820	if (req)	1016	if (req)
821	break;	1017	break;
822		1018
823	pthread_cond_wait (&reqwait, &reqlock);	1019	pthread_cond_wait (&reqwait, &reqlock);
824	}	1020	}
825		1021
826	pthread_mutex_unlock (&reqlock);	1022	--nready;
		1023
		1024	UNLOCK (reqlock);
827		1025
828	errno = 0; /* strictly unnecessary */	1026	errno = 0; /* strictly unnecessary */
829	type = req->type; /* remember type for QUIT check */
830		1027
831	if (!(req->flags & FLAG_CANCELLED))	1028	if (!(req->flags & FLAG_CANCELLED))
832	switch (type)	1029	switch (req->type)
833	{	1030	{
834	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;
835	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;
836		1033
837	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;
838	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;
839		1036
840	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
841	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
842	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
843		1040
…		…
846	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1043	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
847	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1044	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
848	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1045	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
849	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1046	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
850	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1047	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1048	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
851		1049
852	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1050	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
853	case REQ_FSYNC: req->result = fsync (req->fd); break;	1051	case REQ_FSYNC: req->result = fsync (req->fd); break;
854	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1052	case REQ_READDIR: scandir_ (req, self); break;
855		1053
856	case REQ_SLEEP:	1054	case REQ_BUSY:
857	{	1055	{
858	struct timeval tv;	1056	struct timeval tv;
859		1057
860	tv.tv_sec = req->fd;	1058	tv.tv_sec = req->fd;
861	tv.tv_usec = req->fd2;	1059	tv.tv_usec = req->fd2;
…		…
863	req->result = select (0, 0, 0, 0, &tv);	1061	req->result = select (0, 0, 0, 0, &tv);
864	}	1062	}
865		1063
866	case REQ_GROUP:	1064	case REQ_GROUP:
867	case REQ_NOP:	1065	case REQ_NOP:
		1066	break;
		1067
868	case REQ_QUIT:	1068	case REQ_QUIT:
		1069	LOCK (wrklock);
		1070	worker_free (self);
		1071	--started;
		1072	UNLOCK (wrklock);
869	break;	1073	return 0;
870		1074
871	default:	1075	default:
872	req->result = ENOSYS;	1076	req->result = ENOSYS;
873	break;	1077	break;
874	}	1078	}
875		1079
876	req->errorno = errno;	1080	req->errorno = errno;
877		1081
878	pthread_mutex_lock (&reslock);	1082	LOCK (reslock);
879		1083
880	req->next = 0;	1084	++npending;
881		1085
882	if (rese)	1086	if (!reqq_push (&res_queue, req))
883	{
884	rese->next = req;
885	rese = req;
886	}
887	else
888	{
889	rese = ress = req;
890
891	/* write a dummy byte to the pipe so fh becomes ready */	1087	/* write a dummy byte to the pipe so fh becomes ready */
892	write (respipe [1], &respipe, 1);	1088	write (respipe [1], &respipe, 1);
893	}
894		1089
895	pthread_mutex_unlock (&reslock);	1090	self->req = 0;
896	}	1091	worker_clear (self);
897	while (type != REQ_QUIT);
898		1092
899	return 0;	1093	UNLOCK (reslock);
		1094	}
900	}	1095	}
901		1096
902	/*****************************************************************************/	1097	/*****************************************************************************/
903		1098
904	static void atfork_prepare (void)	1099	static void atfork_prepare (void)
905	{	1100	{
906	pthread_mutex_lock (&reqlock);	1101	LOCK (wrklock);
907	pthread_mutex_lock (&reslock);	1102	LOCK (reqlock);
		1103	LOCK (reslock);
908	#if !HAVE_PREADWRITE	1104	#if !HAVE_PREADWRITE
909	pthread_mutex_lock (&preadwritelock);	1105	LOCK (preadwritelock);
910	#endif	1106	#endif
911	#if !HAVE_READDIR_R	1107	#if !HAVE_READDIR_R
912	pthread_mutex_lock (&readdirlock);	1108	LOCK (readdirlock);
913	#endif	1109	#endif
914	}	1110	}
915		1111
916	static void atfork_parent (void)	1112	static void atfork_parent (void)
917	{	1113	{
918	#if !HAVE_READDIR_R	1114	#if !HAVE_READDIR_R
919	pthread_mutex_unlock (&readdirlock);	1115	UNLOCK (readdirlock);
920	#endif	1116	#endif
921	#if !HAVE_PREADWRITE	1117	#if !HAVE_PREADWRITE
922	pthread_mutex_unlock (&preadwritelock);	1118	UNLOCK (preadwritelock);
923	#endif	1119	#endif
924	pthread_mutex_unlock (&reslock);	1120	UNLOCK (reslock);
925	pthread_mutex_unlock (&reqlock);	1121	UNLOCK (reqlock);
		1122	UNLOCK (wrklock);
926	}	1123	}
927		1124
928	static void atfork_child (void)	1125	static void atfork_child (void)
929	{	1126	{
930	aio_req prv;	1127	aio_req prv;
931		1128
		1129	while (prv = reqq_shift (&req_queue))
		1130	req_free (prv);
		1131
		1132	while (prv = reqq_shift (&res_queue))
		1133	req_free (prv);
		1134
		1135	while (wrk_first.next != &wrk_first)
		1136	{
		1137	worker *wrk = wrk_first.next;
		1138
		1139	if (wrk->req)
		1140	req_free (wrk->req);
		1141
		1142	worker_clear (wrk);
		1143	worker_free (wrk);
		1144	}
		1145
932	started = 0;	1146	started = 0;
933		1147	nreqs = 0;
934	while (reqs)
935	{
936	prv = reqs;
937	reqs = prv->next;
938	req_free (prv);
939	}
940
941	reqs = reqe = 0;
942
943	while (ress)
944	{
945	prv = ress;
946	ress = prv->next;
947	req_free (prv);
948	}
949
950	ress = rese = 0;
951		1148
952	close (respipe [0]);	1149	close (respipe [0]);
953	close (respipe [1]);	1150	close (respipe [1]);
954	create_pipe ();	1151	create_pipe ();
955		1152
…		…
985	{	1182	{
986	HV *stash = gv_stashpv ("IO::AIO", 1);	1183	HV *stash = gv_stashpv ("IO::AIO", 1);
987	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1184	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
988	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1185	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
989	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1186	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1187	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1188	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
990		1189
991	create_pipe ();	1190	create_pipe ();
992	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1191	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
993	}
994		1192
		1193	start_thread ();
		1194	}
		1195
995	void	1196	void
996	min_parallel (nthreads)	1197	min_parallel (int nthreads)
997	int nthreads
998	PROTOTYPE: $	1198	PROTOTYPE: $
999		1199
1000	void	1200	void
1001	max_parallel (nthreads)	1201	max_parallel (int nthreads)
1002	int nthreads
1003	PROTOTYPE: $	1202	PROTOTYPE: $
1004		1203
1005	int	1204	int
1006	max_outstanding (nreqs)	1205	max_outstanding (int maxreqs)
1007	int nreqs	1206	PROTOTYPE: $
1008	PROTOTYPE: $
1009	CODE:	1207	CODE:
1010	RETVAL = max_outstanding;	1208	RETVAL = max_outstanding;
1011	max_outstanding = nreqs;	1209	max_outstanding = maxreqs;
		1210	OUTPUT:
		1211	RETVAL
1012		1212
1013	void	1213	void
1014	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1214	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1015	SV * pathname	1215	SV * pathname
1016	int flags	1216	int flags
…		…
1231		1431
1232	REQ_SEND;	1432	REQ_SEND;
1233	}	1433	}
1234		1434
1235	void	1435	void
		1436	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1437	SV * pathname
		1438	SV * callback
		1439	UV mode
		1440	UV dev
		1441	PPCODE:
		1442	{
		1443	dREQ;
		1444
		1445	req->type = REQ_MKNOD;
		1446	req->data = newSVsv (pathname);
		1447	req->dataptr = SvPVbyte_nolen (req->data);
		1448	req->mode = (mode_t)mode;
		1449	req->offset = dev;
		1450
		1451	REQ_SEND;
		1452	}
		1453
		1454	void
1236	aio_sleep (delay,callback=&PL_sv_undef)	1455	aio_busy (delay,callback=&PL_sv_undef)
1237	double delay	1456	double delay
1238	SV * callback	1457	SV * callback
1239	PPCODE:	1458	PPCODE:
1240	{	1459	{
1241	dREQ;	1460	dREQ;
1242		1461
1243	req->type = REQ_SLEEP;	1462	req->type = REQ_BUSY;
1244	req->fd = delay < 0. ? 0 : delay;	1463	req->fd = delay < 0. ? 0 : delay;
1245	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1464	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1246		1465
1247	REQ_SEND;	1466	REQ_SEND;
1248	}	1467	}
…		…
1271	req->type = REQ_NOP;	1490	req->type = REQ_NOP;
1272		1491
1273	REQ_SEND;	1492	REQ_SEND;
1274	}	1493	}
1275		1494
1276	#if 0	1495	int
1277		1496	aioreq_pri (int pri = 0)
1278	void	1497	PROTOTYPE: ;$
1279	aio_pri (int pri = DEFAULT_PRI)
1280	CODE:	1498	CODE:
		1499	RETVAL = next_pri - PRI_BIAS;
		1500	if (items > 0)
		1501	{
1281	if (pri < PRI_MIN) pri = PRI_MIN;	1502	if (pri < PRI_MIN) pri = PRI_MIN;
1282	if (pri > PRI_MAX) pri = PRI_MAX;	1503	if (pri > PRI_MAX) pri = PRI_MAX;
1283	next_pri = pri + PRI_BIAS;	1504	next_pri = pri + PRI_BIAS;
		1505	}
		1506	OUTPUT:
		1507	RETVAL
1284		1508
1285	#endif	1509	void
		1510	aioreq_nice (int nice = 0)
		1511	CODE:
		1512	nice = next_pri - nice;
		1513	if (nice < PRI_MIN) nice = PRI_MIN;
		1514	if (nice > PRI_MAX) nice = PRI_MAX;
		1515	next_pri = nice + PRI_BIAS;
1286		1516
1287	void	1517	void
1288	flush ()	1518	flush ()
1289	PROTOTYPE:	1519	PROTOTYPE:
1290	CODE:	1520	CODE:
1291	while (nreqs)	1521	while (nreqs)
1292	{	1522	{
1293	poll_wait ();	1523	poll_wait ();
1294	poll_cb ();	1524	poll_cb (0);
1295	}	1525	}
1296		1526
1297	void	1527	void
1298	poll()	1528	poll()
1299	PROTOTYPE:	1529	PROTOTYPE:
1300	CODE:	1530	CODE:
1301	if (nreqs)	1531	if (nreqs)
1302	{	1532	{
1303	poll_wait ();	1533	poll_wait ();
1304	poll_cb ();	1534	poll_cb (0);
1305	}	1535	}
1306		1536
1307	int	1537	int
1308	poll_fileno()	1538	poll_fileno()
1309	PROTOTYPE:	1539	PROTOTYPE:
…		…
1314		1544
1315	int	1545	int
1316	poll_cb(...)	1546	poll_cb(...)
1317	PROTOTYPE:	1547	PROTOTYPE:
1318	CODE:	1548	CODE:
1319	RETVAL = poll_cb ();	1549	RETVAL = poll_cb (0);
		1550	OUTPUT:
		1551	RETVAL
		1552
		1553	int
		1554	poll_some(int max = 0)
		1555	PROTOTYPE: $
		1556	CODE:
		1557	RETVAL = poll_cb (max);
1320	OUTPUT:	1558	OUTPUT:
1321	RETVAL	1559	RETVAL
1322		1560
1323	void	1561	void
1324	poll_wait()	1562	poll_wait()
…		…
1333	CODE:	1571	CODE:
1334	RETVAL = nreqs;	1572	RETVAL = nreqs;
1335	OUTPUT:	1573	OUTPUT:
1336	RETVAL	1574	RETVAL
1337		1575
		1576	int
		1577	nready()
		1578	PROTOTYPE:
		1579	CODE:
		1580	RETVAL = get_nready ();
		1581	OUTPUT:
		1582	RETVAL
		1583
		1584	int
		1585	npending()
		1586	PROTOTYPE:
		1587	CODE:
		1588	RETVAL = get_npending ();
		1589	OUTPUT:
		1590	RETVAL
		1591
1338	PROTOTYPES: DISABLE	1592	PROTOTYPES: DISABLE
1339		1593
1340	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1594	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1341		1595
1342	void	1596	void
1343	cancel (aio_req_ornot req)	1597	cancel (aio_req_ornot req)
1344	PROTOTYPE:
1345	CODE:	1598	CODE:
1346	req_cancel (req);	1599	req_cancel (req);
1347		1600
1348	void	1601	void
1349	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1602	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
…		…
1385	}	1638	}
1386	}	1639	}
1387	}	1640	}
1388		1641
1389	void	1642	void
		1643	cancel_subs (aio_req_ornot req)
		1644	CODE:
		1645	req_cancel_subs (req);
		1646
		1647	void
1390	result (aio_req grp, ...)	1648	result (aio_req grp, ...)
1391	CODE:	1649	CODE:
1392	{	1650	{
1393	int i;	1651	int i;
		1652	AV *av;
		1653
		1654	grp->errorno = errno;
		1655
1394	AV *av = newAV ();	1656	av = newAV ();
1395		1657
1396	for (i = 1; i < items; ++i )	1658	for (i = 1; i < items; ++i )
1397	av_push (av, newSVsv (ST (i)));	1659	av_push (av, newSVsv (ST (i)));
1398		1660
1399	SvREFCNT_dec (grp->data);	1661	SvREFCNT_dec (grp->data);
1400	grp->data = (SV *)av;	1662	grp->data = (SV *)av;
1401	}	1663	}
1402		1664
1403	void	1665	void
		1666	errno (aio_req grp, int errorno = errno)
		1667	CODE:
		1668	grp->errorno = errorno;
		1669
		1670	void
1404	feed_limit (aio_req grp, int limit)	1671	limit (aio_req grp, int limit)
1405	CODE:	1672	CODE:
1406	grp->fd2 = limit;	1673	grp->fd2 = limit;
1407	aio_grp_feed (grp);	1674	aio_grp_feed (grp);
1408		1675
1409	void	1676	void

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