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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 1.84 by root, Sat Oct 28 01:24:19 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"
…		…
39	# else	43	# else
40	# error sendfile support requested but not available	44	# error sendfile support requested but not available
41	# endif	45	# endif
42	#endif	46	#endif
43		47
		48	/* number of seconds after which idle threads exit */
		49	#define IDLE_TIMEOUT 10
		50
44	/* used for struct dirent, AIX doesn't provide it */	51	/* used for struct dirent, AIX doesn't provide it */
45	#ifndef NAME_MAX	52	#ifndef NAME_MAX
46	# define NAME_MAX 4096	53	# define NAME_MAX 4096
47	#endif	54	#endif
48		55
		56	#ifndef PTHREAD_STACK_MIN
		57	/* care for broken platforms, e.g. windows */
		58	# define PTHREAD_STACK_MIN 16384
		59	#endif
		60
49	#if __ia64	61	#if __ia64
50	# define STACKSIZE 65536	62	# define STACKSIZE 65536
		63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		64	# define STACKSIZE PTHREAD_STACK_MIN
51	#else	65	#else
52	# define STACKSIZE 8192	66	# define STACKSIZE 16384
		67	#endif
		68
		69	/* wether word reads are potentially non-atomic.
		70	* this is conservatice, likely most arches this runs
		71	* on have atomic word read/writes.
		72	*/
		73	#ifndef WORDREAD_UNSAFE
		74	# if __i386 || __x86_64
		75	# define WORDREAD_UNSAFE 0
		76	# else
		77	# define WORDREAD_UNSAFE 1
53	#endif	78	# endif
		79	#endif
		80
		81	/* buffer size for various temporary buffers */
		82	#define AIO_BUFSIZE 65536
		83
		84	#define dBUF \
		85	char *aio_buf; \
		86	LOCK (wrklock); \
		87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		88	UNLOCK (wrklock); \
		89	if (!aio_buf) \
		90	return -1;
54		91
55	enum {	92	enum {
56	REQ_QUIT,	93	REQ_QUIT,
57	REQ_OPEN, REQ_CLOSE,	94	REQ_OPEN, REQ_CLOSE,
58	REQ_READ, REQ_WRITE, REQ_READAHEAD,	95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
59	REQ_SENDFILE,	96	REQ_SENDFILE,
60	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
61	REQ_FSYNC, REQ_FDATASYNC,	98	REQ_FSYNC, REQ_FDATASYNC,
62	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
63	REQ_READDIR,	100	REQ_MKNOD, REQ_READDIR,
64	REQ_LINK, REQ_SYMLINK,	101	REQ_LINK, REQ_SYMLINK,
65	REQ_GROUP, REQ_NOP,	102	REQ_GROUP, REQ_NOP,
66	REQ_SLEEP,	103	REQ_BUSY,
67	};	104	};
68		105
69	#define AIO_REQ_KLASS "IO::AIO::REQ"	106	#define AIO_REQ_KLASS "IO::AIO::REQ"
70	#define AIO_GRP_KLASS "IO::AIO::GRP"	107	#define AIO_GRP_KLASS "IO::AIO::GRP"
71		108
…		…
105	PRI_MIN = -4,	142	PRI_MIN = -4,
106	PRI_MAX = 4,	143	PRI_MAX = 4,
107		144
108	DEFAULT_PRI = 0,	145	DEFAULT_PRI = 0,
109	PRI_BIAS = -PRI_MIN,	146	PRI_BIAS = -PRI_MIN,
		147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
110	};	148	};
111		149
112	static int next_pri = DEFAULT_PRI + PRI_BIAS;	150	static int next_pri = DEFAULT_PRI + PRI_BIAS;
113		151
114	static int started, wanted;	152	static unsigned int started, idle, wanted;
115	static volatile int nreqs;
116	static int max_outstanding = 1<<30;
117	static int respipe [2];
118		153
119	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	154	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
120	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP	155	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
121	#else	156	#else
122	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER	157	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
123	#endif	158	#endif
124		159
		160	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		161	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		162
		163	/* worker threads management */
		164	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		165
		166	typedef struct worker {
		167	/* locked by wrklock */
		168	struct worker *prev, *next;
		169
		170	pthread_t tid;
		171
		172	/* locked by reslock, reqlock or wrklock */
		173	aio_req req; /* currently processed request */
		174	void *dbuf;
		175	DIR *dirp;
		176	} worker;
		177
		178	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		179
		180	static void worker_clear (worker *wrk)
		181	{
		182	if (wrk->dirp)
		183	{
		184	closedir (wrk->dirp);
		185	wrk->dirp = 0;
		186	}
		187
		188	if (wrk->dbuf)
		189	{
		190	free (wrk->dbuf);
		191	wrk->dbuf = 0;
		192	}
		193	}
		194
		195	static void worker_free (worker *wrk)
		196	{
		197	wrk->next->prev = wrk->prev;
		198	wrk->prev->next = wrk->next;
		199
		200	free (wrk);
		201	}
		202
		203	static volatile unsigned int nreqs, nready, npending;
		204	static volatile unsigned int max_idle = 4;
		205	static volatile unsigned int max_outstanding = 0xffffffff;
		206	static int respipe [2];
		207
125	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	208	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
126	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;	209	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
127	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	210	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
128		211
129	static volatile aio_req reqs, reqe; /* queue start, queue end */	212	#if WORDREAD_UNSAFE
130	static volatile aio_req ress, rese; /* queue start, queue end */
131		213
		214	static unsigned int get_nready ()
		215	{
		216	unsigned int retval;
		217
		218	LOCK (reqlock);
		219	retval = nready;
		220	UNLOCK (reqlock);
		221
		222	return retval;
		223	}
		224
		225	static unsigned int get_npending ()
		226	{
		227	unsigned int retval;
		228
		229	LOCK (reslock);
		230	retval = npending;
		231	UNLOCK (reslock);
		232
		233	return retval;
		234	}
		235
		236	#else
		237
		238	# define get_nready() nready
		239	# define get_npending() npending
		240
		241	#endif
		242
		243	/*
		244	* a somewhat faster data structure might be nice, but
		245	* with 8 priorities this actually needs <20 insns
		246	* per shift, the most expensive operation.
		247	*/
		248	typedef struct {
		249	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		250	int size;
		251	} reqq;
		252
		253	static reqq req_queue;
		254	static reqq res_queue;
		255
		256	int reqq_push (reqq *q, aio_req req)
		257	{
		258	int pri = req->pri;
		259	req->next = 0;
		260
		261	if (q->qe[pri])
		262	{
		263	q->qe[pri]->next = req;
		264	q->qe[pri] = req;
		265	}
		266	else
		267	q->qe[pri] = q->qs[pri] = req;
		268
		269	return q->size++;
		270	}
		271
		272	aio_req reqq_shift (reqq *q)
		273	{
		274	int pri;
		275
		276	if (!q->size)
		277	return 0;
		278
		279	--q->size;
		280
		281	for (pri = NUM_PRI; pri--; )
		282	{
		283	aio_req req = q->qs[pri];
		284
		285	if (req)
		286	{
		287	if (!(q->qs[pri] = req->next))
		288	q->qe[pri] = 0;
		289
		290	return req;
		291	}
		292	}
		293
		294	abort ();
		295	}
		296
		297	static int poll_cb (int max);
132	static void req_invoke (aio_req req);	298	static void req_invoke (aio_req req);
133	static void req_free (aio_req req);	299	static void req_free (aio_req req);
		300	static void req_cancel (aio_req req);
134		301
135	/* must be called at most once */	302	/* must be called at most once */
136	static SV *req_sv (aio_req req, const char *klass)	303	static SV *req_sv (aio_req req, const char *klass)
137	{	304	{
138	if (!req->self)	305	if (!req->self)
…		…
169	ENTER;	336	ENTER;
170	SAVETMPS;	337	SAVETMPS;
171	PUSHMARK (SP);	338	PUSHMARK (SP);
172	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	339	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
173	PUTBACK;	340	PUTBACK;
174	call_sv (grp->fh2, G_VOID | G_EVAL);	341	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
175	SPAGAIN;	342	SPAGAIN;
176	FREETMPS;	343	FREETMPS;
177	LEAVE;	344	LEAVE;
178	}	345	}
179		346
…		…
200	req_invoke (grp);	367	req_invoke (grp);
201	req_free (grp);	368	req_free (grp);
202	}	369	}
203	}	370	}
204		371
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)	372	static void req_invoke (aio_req req)
231	{	373	{
232	dSP;	374	dSP;
233	int errorno = errno;
234		375
235	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))	376	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
236	return;	377	{
237
238	errno = req->errorno;
239
240	ENTER;	378	ENTER;
241	SAVETMPS;	379	SAVETMPS;
242	PUSHMARK (SP);	380	PUSHMARK (SP);
243	EXTEND (SP, 1);	381	EXTEND (SP, 1);
244		382
245	switch (req->type)	383	switch (req->type)
246	{
247	case REQ_READDIR:
248	{	384	{
249	SV *rv = &PL_sv_undef;	385	case REQ_READDIR:
250
251	if (req->result >= 0)
252	{	386	{
253	char *buf = req->data2ptr;	387	SV *rv = &PL_sv_undef;
254	AV *av = newAV ();
255		388
256	while (req->result)	389	if (req->result >= 0)
257	{	390	{
		391	int i;
		392	char *buf = req->data2ptr;
		393	AV *av = newAV ();
		394
		395	av_extend (av, req->result - 1);
		396
		397	for (i = 0; i < req->result; ++i)
		398	{
258	SV *sv = newSVpv (buf, 0);	399	SV *sv = newSVpv (buf, 0);
259		400
260	av_push (av, sv);	401	av_store (av, i, sv);
261	buf += SvCUR (sv) + 1;	402	buf += SvCUR (sv) + 1;
262	req->result--;	403	}
		404
		405	rv = sv_2mortal (newRV_noinc ((SV *)av));
263	}	406	}
264		407
265	rv = sv_2mortal (newRV_noinc ((SV *)av));	408	PUSHs (rv);
266	}	409	}
		410	break;
267		411
268	PUSHs (rv);	412	case REQ_OPEN:
		413	{
		414	/* convert fd to fh */
		415	SV *fh;
		416
		417	PUSHs (sv_2mortal (newSViv (req->result)));
		418	PUTBACK;
		419	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		420	SPAGAIN;
		421
		422	fh = SvREFCNT_inc (POPs);
		423
		424	PUSHMARK (SP);
		425	XPUSHs (sv_2mortal (fh));
		426	}
		427	break;
		428
		429	case REQ_GROUP:
		430	req->fd = 2; /* mark group as finished */
		431
		432	if (req->data)
		433	{
		434	int i;
		435	AV *av = (AV *)req->data;
		436
		437	EXTEND (SP, AvFILL (av) + 1);
		438	for (i = 0; i <= AvFILL (av); ++i)
		439	PUSHs (*av_fetch (av, i, 0));
		440	}
		441	break;
		442
		443	case REQ_NOP:
		444	case REQ_BUSY:
		445	break;
		446
		447	default:
		448	PUSHs (sv_2mortal (newSViv (req->result)));
		449	break;
269	}	450	}
270	break;
271		451
272	case REQ_OPEN:	452	errno = req->errorno;
273	{
274	/* convert fd to fh */
275	SV *fh;
276		453
277	PUSHs (sv_2mortal (newSViv (req->result)));
278	PUTBACK;	454	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);	455	call_sv (req->callback, G_VOID | G_EVAL);
315	SPAGAIN;	456	SPAGAIN;
316		457
317	FREETMPS;	458	FREETMPS;
318	LEAVE;	459	LEAVE;
319
320	errno = errorno;
321
322	if (SvTRUE (ERRSV))
323	{	460	}
324	req_free (req);
325	croak (0);
326	}
327	}
328		461
329	static void req_free (aio_req req)
330	{
331	if (req->grp)	462	if (req->grp)
332	{	463	{
333	aio_req grp = req->grp;	464	aio_req grp = req->grp;
334		465
335	/* unlink request */	466	/* unlink request */
…		…
340	grp->grp_first = req->grp_next;	471	grp->grp_first = req->grp_next;
341		472
342	aio_grp_dec (grp);	473	aio_grp_dec (grp);
343	}	474	}
344		475
		476	if (SvTRUE (ERRSV))
		477	{
		478	req_free (req);
		479	croak (0);
		480	}
		481	}
		482
		483	static void req_free (aio_req req)
		484	{
345	if (req->self)	485	if (req->self)
346	{	486	{
347	sv_unmagic (req->self, PERL_MAGIC_ext);	487	sv_unmagic (req->self, PERL_MAGIC_ext);
348	SvREFCNT_dec (req->self);	488	SvREFCNT_dec (req->self);
349	}	489	}
…		…
352	SvREFCNT_dec (req->fh);	492	SvREFCNT_dec (req->fh);
353	SvREFCNT_dec (req->fh2);	493	SvREFCNT_dec (req->fh2);
354	SvREFCNT_dec (req->callback);	494	SvREFCNT_dec (req->callback);
355	Safefree (req->statdata);	495	Safefree (req->statdata);
356		496
357	if (req->type == REQ_READDIR && req->result >= 0)	497	if (req->type == REQ_READDIR)
358	free (req->data2ptr);	498	free (req->data2ptr);
359		499
360	Safefree (req);	500	Safefree (req);
361	}	501	}
362		502
		503	static void req_cancel_subs (aio_req grp)
		504	{
		505	aio_req sub;
		506
		507	if (grp->type != REQ_GROUP)
		508	return;
		509
		510	SvREFCNT_dec (grp->fh2);
		511	grp->fh2 = 0;
		512
		513	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		514	req_cancel (sub);
		515	}
		516
363	static void req_cancel (aio_req req)	517	static void req_cancel (aio_req req)
364	{	518	{
365	req->flags |= FLAG_CANCELLED;	519	req->flags |= FLAG_CANCELLED;
366		520
367	if (req->type == REQ_GROUP)	521	req_cancel_subs (req);
368	{	522	}
369	aio_req sub;
370		523
371	for (sub = req->grp_first; sub; sub = sub->grp_next)	524	static void *aio_proc(void *arg);
372	req_cancel (sub);	525
		526	static void start_thread (void)
		527	{
		528	sigset_t fullsigset, oldsigset;
		529	pthread_attr_t attr;
		530
		531	worker *wrk = calloc (1, sizeof (worker));
		532
		533	if (!wrk)
		534	croak ("unable to allocate worker thread data");
		535
		536	pthread_attr_init (&attr);
		537	pthread_attr_setstacksize (&attr, STACKSIZE);
		538	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		539	#ifdef PTHREAD_SCOPE_PROCESS
		540	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		541	#endif
		542
		543	sigfillset (&fullsigset);
		544
		545	LOCK (wrklock);
		546	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
		547
		548	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
373	}	549	{
374	}	550	wrk->prev = &wrk_first;
		551	wrk->next = wrk_first.next;
		552	wrk_first.next->prev = wrk;
		553	wrk_first.next = wrk;
		554	++started;
		555	}
		556	else
		557	free (wrk);
375		558
		559	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		560	UNLOCK (wrklock);
		561	}
		562
		563	static void maybe_start_thread ()
		564	{
		565	if (started >= wanted)
		566	return;
		567
		568	/* todo: maybe use idle here, but might be less exact */
		569	if ((int)nready <= (int)started - (int)(nreqs - get_nready () - get_npending ()))
		570	return;
		571
		572	start_thread ();
		573	}
		574
		575	static void req_send (aio_req req)
		576	{
		577	++nreqs;
		578
		579	LOCK (reqlock);
		580	++nready;
		581	reqq_push (&req_queue, req);
		582	pthread_cond_signal (&reqwait);
		583	UNLOCK (reqlock);
		584
		585	maybe_start_thread ();
		586	}
		587
		588	static void end_thread (void)
		589	{
		590	aio_req req;
		591
		592	Newz (0, req, 1, aio_cb);
		593
		594	req->type = REQ_QUIT;
		595	req->pri = PRI_MAX + PRI_BIAS;
		596
		597	LOCK (reqlock);
		598	reqq_push (&req_queue, req);
		599	pthread_cond_signal (&reqwait);
		600	UNLOCK (reqlock);
		601
		602	LOCK (wrklock);
		603	--started;
		604	UNLOCK (wrklock);
		605	}
		606
		607	static void min_parallel (int nthreads)
		608	{
		609	if (wanted < nthreads)
		610	wanted = nthreads;
		611	}
		612
		613	static void max_parallel (int nthreads)
		614	{
		615	if (wanted > nthreads)
		616	wanted = nthreads;
		617
		618	while (started > wanted)
		619	end_thread ();
		620	}
		621
		622	static void poll_wait ()
		623	{
		624	fd_set rfd;
		625
		626	while (nreqs)
		627	{
		628	int size;
		629	if (WORDREAD_UNSAFE) LOCK (reslock);
		630	size = res_queue.size;
		631	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		632
		633	if (size)
		634	return;
		635
		636	maybe_start_thread ();
		637
		638	FD_ZERO(&rfd);
		639	FD_SET(respipe [0], &rfd);
		640
		641	select (respipe [0] + 1, &rfd, 0, 0, 0);
		642	}
		643	}
		644
376	static int poll_cb ()	645	static int poll_cb (int max)
377	{	646	{
378	dSP;	647	dSP;
379	int count = 0;	648	int count = 0;
380	int do_croak = 0;	649	int do_croak = 0;
381	aio_req req;	650	aio_req req;
382		651
383	for (;;)	652	for (;;)
384	{	653	{
385	pthread_mutex_lock (&reslock);	654	while (max <= 0 || count < max)
386	req = ress;
387
388	if (req)
389	{	655	{
390	ress = req->next;	656	maybe_start_thread ();
391		657
		658	LOCK (reslock);
		659	req = reqq_shift (&res_queue);
		660
392	if (!ress)	661	if (req)
393	{	662	{
		663	--npending;
		664
		665	if (!res_queue.size)
		666	{
394	/* read any signals sent by the worker threads */	667	/* read any signals sent by the worker threads */
395	char buf [32];	668	char buf [32];
396	while (read (respipe [0], buf, 32) == 32)	669	while (read (respipe [0], buf, 32) == 32)
		670	;
397	;	671	}
398
399	rese = 0;
400	}	672	}
		673
		674	UNLOCK (reslock);
		675
		676	if (!req)
		677	break;
		678
		679	--nreqs;
		680
		681	if (req->type == REQ_GROUP && req->length)
		682	{
		683	req->fd = 1; /* mark request as delayed */
		684	continue;
		685	}
		686	else
		687	{
		688	if (req->type == REQ_READ)
		689	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		690
		691	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		692	SvREADONLY_off (req->data);
		693
		694	if (req->statdata)
		695	{
		696	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		697	PL_laststatval = req->result;
		698	PL_statcache = *(req->statdata);
		699	}
		700
		701	req_invoke (req);
		702
		703	count++;
		704	}
		705
		706	req_free (req);
401	}	707	}
402		708
403	pthread_mutex_unlock (&reslock);	709	if (nreqs <= max_outstanding)
404
405	if (!req)
406	break;	710	break;
407		711
408	--nreqs;	712	poll_wait ();
409		713
410	if (req->type == REQ_QUIT)	714	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	}	715	}
439		716
440	return count;	717	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	}	718	}
532		719
533	static void create_pipe ()	720	static void create_pipe ()
534	{	721	{
535	if (pipe (respipe))	722	if (pipe (respipe))
…		…
559	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	746	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
560	{	747	{
561	ssize_t res;	748	ssize_t res;
562	off_t ooffset;	749	off_t ooffset;
563		750
564	pthread_mutex_lock (&preadwritelock);	751	LOCK (preadwritelock);
565	ooffset = lseek (fd, 0, SEEK_CUR);	752	ooffset = lseek (fd, 0, SEEK_CUR);
566	lseek (fd, offset, SEEK_SET);	753	lseek (fd, offset, SEEK_SET);
567	res = read (fd, buf, count);	754	res = read (fd, buf, count);
568	lseek (fd, ooffset, SEEK_SET);	755	lseek (fd, ooffset, SEEK_SET);
569	pthread_mutex_unlock (&preadwritelock);	756	UNLOCK (preadwritelock);
570		757
571	return res;	758	return res;
572	}	759	}
573		760
574	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	761	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
575	{	762	{
576	ssize_t res;	763	ssize_t res;
577	off_t ooffset;	764	off_t ooffset;
578		765
579	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
580	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
581	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
582	res = write (fd, buf, count);	769	res = write (fd, buf, count);
583	lseek (fd, offset, SEEK_SET);	770	lseek (fd, offset, SEEK_SET);
584	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
585		772
586	return res;	773	return res;
587	}	774	}
588	#endif	775	#endif
589		776
590	#if !HAVE_FDATASYNC	777	#if !HAVE_FDATASYNC
591	# define fdatasync fsync	778	# define fdatasync fsync
592	#endif	779	#endif
593		780
594	#if !HAVE_READAHEAD	781	#if !HAVE_READAHEAD
595	# define readahead aio_readahead	782	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
596		783
597	static ssize_t readahead (int fd, off_t offset, size_t count)	784	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
598	{	785	{
599	char readahead_buf[4096];	786	dBUF;
600		787
601	while (count > 0)	788	while (count > 0)
602	{	789	{
603	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	790	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
604		791
605	pread (fd, readahead_buf, len, offset);	792	pread (fd, aio_buf, len, offset);
606	offset += len;	793	offset += len;
607	count -= len;	794	count -= len;
608	}	795	}
609		796
610	errno = 0;	797	errno = 0;
611	}	798	}
		799
612	#endif	800	#endif
613		801
614	#if !HAVE_READDIR_R	802	#if !HAVE_READDIR_R
615	# define readdir_r aio_readdir_r	803	# define readdir_r aio_readdir_r
616		804
…		…
619	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	807	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
620	{	808	{
621	struct dirent *e;	809	struct dirent *e;
622	int errorno;	810	int errorno;
623		811
624	pthread_mutex_lock (&readdirlock);	812	LOCK (readdirlock);
625		813
626	e = readdir (dirp);	814	e = readdir (dirp);
627	errorno = errno;	815	errorno = errno;
628		816
629	if (e)	817	if (e)
…		…
632	strcpy (ent->d_name, e->d_name);	820	strcpy (ent->d_name, e->d_name);
633	}	821	}
634	else	822	else
635	*res = 0;	823	*res = 0;
636		824
637	pthread_mutex_unlock (&readdirlock);	825	UNLOCK (readdirlock);
638		826
639	errno = errorno;	827	errno = errorno;
640	return e ? 0 : -1;	828	return e ? 0 : -1;
641	}	829	}
642	#endif	830	#endif
643		831
644	/* sendfile always needs emulation */	832	/* sendfile always needs emulation */
645	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	833	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
646	{	834	{
647	ssize_t res;	835	ssize_t res;
648		836
649	if (!count)	837	if (!count)
650	return 0;	838	return 0;
…		…
661	{	849	{
662	off_t sbytes;	850	off_t sbytes;
663	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	851	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
664		852
665	if (res < 0 && sbytes)	853	if (res < 0 && sbytes)
666	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	854	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
667	res = sbytes;	855	res = sbytes;
668	}	856	}
669		857
670	# elif __hpux	858	# elif __hpux
671	res = sendfile (ofd, ifd, offset, count, 0, 0);	859	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
699	#endif	887	#endif
700	)	888	)
701	)	889	)
702	{	890	{
703	/* emulate sendfile. this is a major pain in the ass */	891	/* emulate sendfile. this is a major pain in the ass */
704	char buf[4096];	892	dBUF;
		893
705	res = 0;	894	res = 0;
706		895
707	while (count)	896	while (count)
708	{	897	{
709	ssize_t cnt;	898	ssize_t cnt;
710		899
711	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	900	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
712		901
713	if (cnt <= 0)	902	if (cnt <= 0)
714	{	903	{
715	if (cnt && !res) res = -1;	904	if (cnt && !res) res = -1;
716	break;	905	break;
717	}	906	}
718		907
719	cnt = write (ofd, buf, cnt);	908	cnt = write (ofd, aio_buf, cnt);
720		909
721	if (cnt <= 0)	910	if (cnt <= 0)
722	{	911	{
723	if (cnt && !res) res = -1;	912	if (cnt && !res) res = -1;
724	break;	913	break;
…		…
732		921
733	return res;	922	return res;
734	}	923	}
735		924
736	/* read a full directory */	925	/* read a full directory */
737	static int scandir_ (const char *path, void **namesp)	926	static void scandir_ (aio_req req, worker *self)
738	{	927	{
739	DIR *dirp = opendir (path);	928	DIR *dirp;
740	union	929	union
741	{	930	{
742	struct dirent d;	931	struct dirent d;
743	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	932	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
744	} u;	933	} *u;
745	struct dirent *entp;	934	struct dirent *entp;
746	char *name, *names;	935	char *name, *names;
747	int memlen = 4096;	936	int memlen = 4096;
748	int memofs = 0;	937	int memofs = 0;
749	int res = 0;	938	int res = 0;
750	int errorno;	939	int errorno;
751		940
752	if (!dirp)	941	LOCK (wrklock);
753	return -1;	942	self->dirp = dirp = opendir (req->dataptr);
754		943	self->dbuf = u = malloc (sizeof (*u));
755	names = malloc (memlen);	944	req->data2ptr = names = malloc (memlen);
		945	UNLOCK (wrklock);
		946
		947	if (dirp && u && names)
		948	for (;;)
		949	{
		950	errno = 0;
		951	readdir_r (dirp, &u->d, &entp);
		952
		953	if (!entp)
		954	break;
		955
		956	name = entp->d_name;
		957
		958	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		959	{
		960	int len = strlen (name) + 1;
		961
		962	res++;
		963
		964	while (memofs + len > memlen)
		965	{
		966	memlen *= 2;
		967	LOCK (wrklock);
		968	req->data2ptr = names = realloc (names, memlen);
		969	UNLOCK (wrklock);
		970
		971	if (!names)
		972	break;
		973	}
		974
		975	memcpy (names + memofs, name, len);
		976	memofs += len;
		977	}
		978	}
		979
		980	if (errno)
		981	res = -1;
		982
		983	req->result = res;
		984	}
		985
		986	/*****************************************************************************/
		987
		988	static void *aio_proc (void *thr_arg)
		989	{
		990	aio_req req;
		991	struct timespec ts;
		992	worker *self = (worker *)thr_arg;
		993
		994	/* try to distribute timeouts somewhat evenly */
		995	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		996	* (1000000000UL / 1024UL);
756		997
757	for (;;)	998	for (;;)
758	{	999	{
759	errno = 0, readdir_r (dirp, &u.d, &entp);	1000	ts.tv_sec = time (0) + IDLE_TIMEOUT;
760		1001
761	if (!entp)	1002	LOCK (reqlock);
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		1003
810	for (;;)	1004	for (;;)
811	{	1005	{
812	req = reqs;	1006	self->req = req = reqq_shift (&req_queue);
813
814	if (reqs)
815	{
816	reqs = reqs->next;
817	if (!reqs) reqe = 0;
818	}
819		1007
820	if (req)	1008	if (req)
821	break;	1009	break;
822		1010
		1011	++idle;
		1012
		1013	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
		1014	== ETIMEDOUT)
		1015	{
		1016	if (idle > max_idle)
		1017	{
		1018	--idle;
		1019	UNLOCK (reqlock);
		1020	LOCK (wrklock);
		1021	--started;
		1022	UNLOCK (wrklock);
		1023	goto quit;
		1024	}
		1025
		1026	/* we are allowed to idle, so do so without any timeout */
823	pthread_cond_wait (&reqwait, &reqlock);	1027	pthread_cond_wait (&reqwait, &reqlock);
		1028	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1029	}
		1030
		1031	--idle;
824	}	1032	}
825		1033
826	pthread_mutex_unlock (&reqlock);	1034	--nready;
		1035
		1036	UNLOCK (reqlock);
827		1037
828	errno = 0; /* strictly unnecessary */	1038	errno = 0; /* strictly unnecessary */
829	type = req->type; /* remember type for QUIT check */
830		1039
831	if (!(req->flags & FLAG_CANCELLED))	1040	if (!(req->flags & FLAG_CANCELLED))
832	switch (type)	1041	switch (req->type)
833	{	1042	{
834	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1043	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;	1044	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
836		1045
837	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1046	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;	1047	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
839		1048
840	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1049	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
841	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1050	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
842	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1051	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
843		1052
…		…
846	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1055	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
847	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1056	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
848	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1057	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
849	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1058	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
850	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1059	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1060	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
851		1061
852	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1062	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
853	case REQ_FSYNC: req->result = fsync (req->fd); break;	1063	case REQ_FSYNC: req->result = fsync (req->fd); break;
854	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1064	case REQ_READDIR: scandir_ (req, self); break;
855		1065
856	case REQ_SLEEP:	1066	case REQ_BUSY:
857	{	1067	{
858	struct timeval tv;	1068	struct timeval tv;
859		1069
860	tv.tv_sec = req->fd;	1070	tv.tv_sec = req->fd;
861	tv.tv_usec = req->fd2;	1071	tv.tv_usec = req->fd2;
…		…
863	req->result = select (0, 0, 0, 0, &tv);	1073	req->result = select (0, 0, 0, 0, &tv);
864	}	1074	}
865		1075
866	case REQ_GROUP:	1076	case REQ_GROUP:
867	case REQ_NOP:	1077	case REQ_NOP:
		1078	break;
		1079
868	case REQ_QUIT:	1080	case REQ_QUIT:
869	break;	1081	goto quit;
870		1082
871	default:	1083	default:
872	req->result = ENOSYS;	1084	req->result = ENOSYS;
873	break;	1085	break;
874	}	1086	}
875		1087
876	req->errorno = errno;	1088	req->errorno = errno;
877		1089
878	pthread_mutex_lock (&reslock);	1090	LOCK (reslock);
879		1091
880	req->next = 0;	1092	++npending;
881		1093
882	if (rese)	1094	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 */	1095	/* write a dummy byte to the pipe so fh becomes ready */
892	write (respipe [1], &respipe, 1);	1096	write (respipe [1], &respipe, 1);
893	}
894		1097
895	pthread_mutex_unlock (&reslock);	1098	self->req = 0;
		1099	worker_clear (self);
		1100
		1101	UNLOCK (reslock);
896	}	1102	}
897	while (type != REQ_QUIT);	1103
		1104	quit:
		1105	LOCK (wrklock);
		1106	worker_free (self);
		1107	UNLOCK (wrklock);
898		1108
899	return 0;	1109	return 0;
900	}	1110	}
901		1111
902	/*****************************************************************************/	1112	/*****************************************************************************/
903		1113
904	static void atfork_prepare (void)	1114	static void atfork_prepare (void)
905	{	1115	{
906	pthread_mutex_lock (&reqlock);	1116	LOCK (wrklock);
907	pthread_mutex_lock (&reslock);	1117	LOCK (reqlock);
		1118	LOCK (reslock);
908	#if !HAVE_PREADWRITE	1119	#if !HAVE_PREADWRITE
909	pthread_mutex_lock (&preadwritelock);	1120	LOCK (preadwritelock);
910	#endif	1121	#endif
911	#if !HAVE_READDIR_R	1122	#if !HAVE_READDIR_R
912	pthread_mutex_lock (&readdirlock);	1123	LOCK (readdirlock);
913	#endif	1124	#endif
914	}	1125	}
915		1126
916	static void atfork_parent (void)	1127	static void atfork_parent (void)
917	{	1128	{
918	#if !HAVE_READDIR_R	1129	#if !HAVE_READDIR_R
919	pthread_mutex_unlock (&readdirlock);	1130	UNLOCK (readdirlock);
920	#endif	1131	#endif
921	#if !HAVE_PREADWRITE	1132	#if !HAVE_PREADWRITE
922	pthread_mutex_unlock (&preadwritelock);	1133	UNLOCK (preadwritelock);
923	#endif	1134	#endif
924	pthread_mutex_unlock (&reslock);	1135	UNLOCK (reslock);
925	pthread_mutex_unlock (&reqlock);	1136	UNLOCK (reqlock);
		1137	UNLOCK (wrklock);
926	}	1138	}
927		1139
928	static void atfork_child (void)	1140	static void atfork_child (void)
929	{	1141	{
930	aio_req prv;	1142	aio_req prv;
931		1143
		1144	while (prv = reqq_shift (&req_queue))
		1145	req_free (prv);
		1146
		1147	while (prv = reqq_shift (&res_queue))
		1148	req_free (prv);
		1149
		1150	while (wrk_first.next != &wrk_first)
		1151	{
		1152	worker *wrk = wrk_first.next;
		1153
		1154	if (wrk->req)
		1155	req_free (wrk->req);
		1156
		1157	worker_clear (wrk);
		1158	worker_free (wrk);
		1159	}
		1160
932	started = 0;	1161	started = 0;
933		1162	idle = 0;
934	while (reqs)	1163	nreqs = 0;
935	{	1164	nready = 0;
936	prv = reqs;	1165	npending = 0;
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		1166
952	close (respipe [0]);	1167	close (respipe [0]);
953	close (respipe [1]);	1168	close (respipe [1]);
954	create_pipe ();	1169	create_pipe ();
955		1170
…		…
982	PROTOTYPES: ENABLE	1197	PROTOTYPES: ENABLE
983		1198
984	BOOT:	1199	BOOT:
985	{	1200	{
986	HV *stash = gv_stashpv ("IO::AIO", 1);	1201	HV *stash = gv_stashpv ("IO::AIO", 1);
		1202
987	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1203	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
988	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1204	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
989	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1205	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1206	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1207	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1208	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
990		1209
991	create_pipe ();	1210	create_pipe ();
992	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1211	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
993	}	1212	}
994		1213
995	void	1214	void
996	min_parallel (nthreads)	1215	min_parallel (int nthreads)
997	int nthreads
998	PROTOTYPE: $	1216	PROTOTYPE: $
999		1217
1000	void	1218	void
1001	max_parallel (nthreads)	1219	max_parallel (int nthreads)
1002	int nthreads
1003	PROTOTYPE: $	1220	PROTOTYPE: $
1004		1221
1005	int	1222	int
1006	max_outstanding (nreqs)	1223	max_outstanding (int maxreqs)
1007	int nreqs	1224	PROTOTYPE: $
1008	PROTOTYPE: $
1009	CODE:	1225	CODE:
1010	RETVAL = max_outstanding;	1226	RETVAL = max_outstanding;
1011	max_outstanding = nreqs;	1227	max_outstanding = maxreqs;
		1228	OUTPUT:
		1229	RETVAL
1012		1230
1013	void	1231	void
1014	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1232	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1015	SV * pathname	1233	SV * pathname
1016	int flags	1234	int flags
…		…
1231		1449
1232	REQ_SEND;	1450	REQ_SEND;
1233	}	1451	}
1234		1452
1235	void	1453	void
		1454	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1455	SV * pathname
		1456	SV * callback
		1457	UV mode
		1458	UV dev
		1459	PPCODE:
		1460	{
		1461	dREQ;
		1462
		1463	req->type = REQ_MKNOD;
		1464	req->data = newSVsv (pathname);
		1465	req->dataptr = SvPVbyte_nolen (req->data);
		1466	req->mode = (mode_t)mode;
		1467	req->offset = dev;
		1468
		1469	REQ_SEND;
		1470	}
		1471
		1472	void
1236	aio_sleep (delay,callback=&PL_sv_undef)	1473	aio_busy (delay,callback=&PL_sv_undef)
1237	double delay	1474	double delay
1238	SV * callback	1475	SV * callback
1239	PPCODE:	1476	PPCODE:
1240	{	1477	{
1241	dREQ;	1478	dREQ;
1242		1479
1243	req->type = REQ_SLEEP;	1480	req->type = REQ_BUSY;
1244	req->fd = delay < 0. ? 0 : delay;	1481	req->fd = delay < 0. ? 0 : delay;
1245	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1482	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1246		1483
1247	REQ_SEND;	1484	REQ_SEND;
1248	}	1485	}
…		…
1271	req->type = REQ_NOP;	1508	req->type = REQ_NOP;
1272		1509
1273	REQ_SEND;	1510	REQ_SEND;
1274	}	1511	}
1275		1512
1276	#if 0	1513	int
1277		1514	aioreq_pri (int pri = 0)
1278	void	1515	PROTOTYPE: ;$
1279	aio_pri (int pri = DEFAULT_PRI)
1280	CODE:	1516	CODE:
		1517	RETVAL = next_pri - PRI_BIAS;
		1518	if (items > 0)
		1519	{
1281	if (pri < PRI_MIN) pri = PRI_MIN;	1520	if (pri < PRI_MIN) pri = PRI_MIN;
1282	if (pri > PRI_MAX) pri = PRI_MAX;	1521	if (pri > PRI_MAX) pri = PRI_MAX;
1283	next_pri = pri + PRI_BIAS;	1522	next_pri = pri + PRI_BIAS;
		1523	}
		1524	OUTPUT:
		1525	RETVAL
1284		1526
1285	#endif	1527	void
		1528	aioreq_nice (int nice = 0)
		1529	CODE:
		1530	nice = next_pri - nice;
		1531	if (nice < PRI_MIN) nice = PRI_MIN;
		1532	if (nice > PRI_MAX) nice = PRI_MAX;
		1533	next_pri = nice + PRI_BIAS;
1286		1534
1287	void	1535	void
1288	flush ()	1536	flush ()
1289	PROTOTYPE:	1537	PROTOTYPE:
1290	CODE:	1538	CODE:
1291	while (nreqs)	1539	while (nreqs)
1292	{	1540	{
1293	poll_wait ();	1541	poll_wait ();
1294	poll_cb ();	1542	poll_cb (0);
1295	}	1543	}
1296		1544
1297	void	1545	void
1298	poll()	1546	poll()
1299	PROTOTYPE:	1547	PROTOTYPE:
1300	CODE:	1548	CODE:
1301	if (nreqs)	1549	if (nreqs)
1302	{	1550	{
1303	poll_wait ();	1551	poll_wait ();
1304	poll_cb ();	1552	poll_cb (0);
1305	}	1553	}
1306		1554
1307	int	1555	int
1308	poll_fileno()	1556	poll_fileno()
1309	PROTOTYPE:	1557	PROTOTYPE:
…		…
1314		1562
1315	int	1563	int
1316	poll_cb(...)	1564	poll_cb(...)
1317	PROTOTYPE:	1565	PROTOTYPE:
1318	CODE:	1566	CODE:
1319	RETVAL = poll_cb ();	1567	RETVAL = poll_cb (0);
		1568	OUTPUT:
		1569	RETVAL
		1570
		1571	int
		1572	poll_some(int max = 0)
		1573	PROTOTYPE: $
		1574	CODE:
		1575	RETVAL = poll_cb (max);
1320	OUTPUT:	1576	OUTPUT:
1321	RETVAL	1577	RETVAL
1322		1578
1323	void	1579	void
1324	poll_wait()	1580	poll_wait()
…		…
1333	CODE:	1589	CODE:
1334	RETVAL = nreqs;	1590	RETVAL = nreqs;
1335	OUTPUT:	1591	OUTPUT:
1336	RETVAL	1592	RETVAL
1337		1593
		1594	int
		1595	nready()
		1596	PROTOTYPE:
		1597	CODE:
		1598	RETVAL = get_nready ();
		1599	OUTPUT:
		1600	RETVAL
		1601
		1602	int
		1603	npending()
		1604	PROTOTYPE:
		1605	CODE:
		1606	RETVAL = get_npending ();
		1607	OUTPUT:
		1608	RETVAL
		1609
1338	PROTOTYPES: DISABLE	1610	PROTOTYPES: DISABLE
1339		1611
1340	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1612	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1341		1613
1342	void	1614	void
1343	cancel (aio_req_ornot req)	1615	cancel (aio_req_ornot req)
1344	PROTOTYPE:
1345	CODE:	1616	CODE:
1346	req_cancel (req);	1617	req_cancel (req);
1347		1618
1348	void	1619	void
1349	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1620	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
…		…
1385	}	1656	}
1386	}	1657	}
1387	}	1658	}
1388		1659
1389	void	1660	void
		1661	cancel_subs (aio_req_ornot req)
		1662	CODE:
		1663	req_cancel_subs (req);
		1664
		1665	void
1390	result (aio_req grp, ...)	1666	result (aio_req grp, ...)
1391	CODE:	1667	CODE:
1392	{	1668	{
1393	int i;	1669	int i;
		1670	AV *av;
		1671
		1672	grp->errorno = errno;
		1673
1394	AV *av = newAV ();	1674	av = newAV ();
1395		1675
1396	for (i = 1; i < items; ++i )	1676	for (i = 1; i < items; ++i )
1397	av_push (av, newSVsv (ST (i)));	1677	av_push (av, newSVsv (ST (i)));
1398		1678
1399	SvREFCNT_dec (grp->data);	1679	SvREFCNT_dec (grp->data);
1400	grp->data = (SV *)av;	1680	grp->data = (SV *)av;
1401	}	1681	}
1402		1682
1403	void	1683	void
		1684	errno (aio_req grp, int errorno = errno)
		1685	CODE:
		1686	grp->errorno = errorno;
		1687
		1688	void
1404	feed_limit (aio_req grp, int limit)	1689	limit (aio_req grp, int limit)
1405	CODE:	1690	CODE:
1406	grp->fd2 = limit;	1691	grp->fd2 = limit;
1407	aio_grp_feed (grp);	1692	aio_grp_feed (grp);
1408		1693
1409	void	1694	void

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