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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.65 by root, Tue Oct 24 00:26:32 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
		54	#endif
		55
		56	#ifndef PTHREAD_STACK_MIN
		57	/* care for broken platforms, e.g. windows */
		58	# define PTHREAD_STACK_MIN 16384
47	#endif	59	#endif
48		60
49	#if __ia64	61	#if __ia64
50	# define STACKSIZE 65536	62	# define STACKSIZE 65536
51	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */	63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
52	# define STACKSIZE PTHREAD_STACK_MIN	64	# define STACKSIZE PTHREAD_STACK_MIN
53	#else	65	#else
54	# define STACKSIZE 16384	66	# define STACKSIZE 16384
55	#endif	67	#endif
56		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
		78	# endif
		79	#endif
		80
57	/* buffer size for various temporary buffers */	81	/* buffer size for various temporary buffers */
58	#define AIO_BUFSIZE 65536	82	#define AIO_BUFSIZE 65536
59		83
60	#define dBUF \	84	#define dBUF \
		85	char *aio_buf; \
		86	LOCK (wrklock); \
61	char *aio_buf = malloc (AIO_BUFSIZE); \	87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		88	UNLOCK (wrklock); \
62	if (!aio_buf) \	89	if (!aio_buf) \
63	return -1;	90	return -1;
64
65	#define fBUF free (aio_buf)
66		91
67	enum {	92	enum {
68	REQ_QUIT,	93	REQ_QUIT,
69	REQ_OPEN, REQ_CLOSE,	94	REQ_OPEN, REQ_CLOSE,
70	REQ_READ, REQ_WRITE, REQ_READAHEAD,	95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
71	REQ_SENDFILE,	96	REQ_SENDFILE,
72	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
73	REQ_FSYNC, REQ_FDATASYNC,	98	REQ_FSYNC, REQ_FDATASYNC,
74	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
75	REQ_READDIR,	100	REQ_MKNOD, REQ_READDIR,
76	REQ_LINK, REQ_SYMLINK,	101	REQ_LINK, REQ_SYMLINK,
77	REQ_GROUP, REQ_NOP,	102	REQ_GROUP, REQ_NOP,
78	REQ_SLEEP,	103	REQ_BUSY,
79	};	104	};
80		105
81	#define AIO_REQ_KLASS "IO::AIO::REQ"	106	#define AIO_REQ_KLASS "IO::AIO::REQ"
82	#define AIO_GRP_KLASS "IO::AIO::GRP"	107	#define AIO_GRP_KLASS "IO::AIO::GRP"
83		108
…		…
117	PRI_MIN = -4,	142	PRI_MIN = -4,
118	PRI_MAX = 4,	143	PRI_MAX = 4,
119		144
120	DEFAULT_PRI = 0,	145	DEFAULT_PRI = 0,
121	PRI_BIAS = -PRI_MIN,	146	PRI_BIAS = -PRI_MIN,
		147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
122	};	148	};
123		149
124	static int next_pri = DEFAULT_PRI + PRI_BIAS;	150	static int next_pri = DEFAULT_PRI + PRI_BIAS;
125		151
126	static int started, wanted;	152	static unsigned int started, idle, wanted;
127	static volatile int nreqs;
128	static int max_outstanding = 1<<30;
129	static int respipe [2];
130		153
131	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	154	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
132	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP	155	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
133	#else	156	#else
134	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER	157	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
135	#endif	158	#endif
136		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
137	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	208	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
138	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;	209	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
139	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	210	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
140		211
141	static volatile aio_req reqs, reqe; /* queue start, queue end */	212	#if WORDREAD_UNSAFE
142	static volatile aio_req ress, rese; /* queue start, queue end */
143		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);
144	static void req_invoke (aio_req req);	298	static void req_invoke (aio_req req);
145	static void req_free (aio_req req);	299	static void req_free (aio_req req);
		300	static void req_cancel (aio_req req);
146		301
147	/* must be called at most once */	302	/* must be called at most once */
148	static SV *req_sv (aio_req req, const char *klass)	303	static SV *req_sv (aio_req req, const char *klass)
149	{	304	{
150	if (!req->self)	305	if (!req->self)
…		…
181	ENTER;	336	ENTER;
182	SAVETMPS;	337	SAVETMPS;
183	PUSHMARK (SP);	338	PUSHMARK (SP);
184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	339	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
185	PUTBACK;	340	PUTBACK;
186	call_sv (grp->fh2, G_VOID | G_EVAL);	341	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
187	SPAGAIN;	342	SPAGAIN;
188	FREETMPS;	343	FREETMPS;
189	LEAVE;	344	LEAVE;
190	}	345	}
191		346
…		…
212	req_invoke (grp);	367	req_invoke (grp);
213	req_free (grp);	368	req_free (grp);
214	}	369	}
215	}	370	}
216		371
217	static void poll_wait ()
218	{
219	fd_set rfd;
220
221	while (nreqs)
222	{
223	aio_req req;
224	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
225	pthread_mutex_lock (&reslock);
226	#endif
227	req = ress;
228	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
229	pthread_mutex_unlock (&reslock);
230	#endif
231
232	if (req)
233	return;
234
235	FD_ZERO(&rfd);
236	FD_SET(respipe [0], &rfd);
237
238	select (respipe [0] + 1, &rfd, 0, 0, 0);
239	}
240	}
241
242	static void req_invoke (aio_req req)	372	static void req_invoke (aio_req req)
243	{	373	{
244	dSP;	374	dSP;
245	int errorno = errno;
246		375
247	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))	376	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
248	return;	377	{
249
250	errno = req->errorno;
251
252	ENTER;	378	ENTER;
253	SAVETMPS;	379	SAVETMPS;
254	PUSHMARK (SP);	380	PUSHMARK (SP);
255	EXTEND (SP, 1);	381	EXTEND (SP, 1);
256		382
257	switch (req->type)	383	switch (req->type)
258	{
259	case REQ_READDIR:
260	{	384	{
261	SV *rv = &PL_sv_undef;	385	case REQ_READDIR:
262
263	if (req->result >= 0)
264	{	386	{
265	char *buf = req->data2ptr;	387	SV *rv = &PL_sv_undef;
266	AV *av = newAV ();
267		388
268	while (req->result)	389	if (req->result >= 0)
269	{	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	{
270	SV *sv = newSVpv (buf, 0);	399	SV *sv = newSVpv (buf, 0);
271		400
272	av_push (av, sv);	401	av_store (av, i, sv);
273	buf += SvCUR (sv) + 1;	402	buf += SvCUR (sv) + 1;
274	req->result--;	403	}
		404
		405	rv = sv_2mortal (newRV_noinc ((SV *)av));
275	}	406	}
276		407
277	rv = sv_2mortal (newRV_noinc ((SV *)av));	408	PUSHs (rv);
278	}	409	}
		410	break;
279		411
280	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;
281	}	450	}
282	break;
283		451
284	case REQ_OPEN:	452	errno = req->errorno;
285	{
286	/* convert fd to fh */
287	SV *fh;
288		453
289	PUSHs (sv_2mortal (newSViv (req->result)));
290	PUTBACK;	454	PUTBACK;
291	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
292	SPAGAIN;
293
294	fh = SvREFCNT_inc (POPs);
295
296	PUSHMARK (SP);
297	XPUSHs (sv_2mortal (fh));
298	}
299	break;
300
301	case REQ_GROUP:
302	req->fd = 2; /* mark group as finished */
303
304	if (req->data)
305	{
306	int i;
307	AV *av = (AV *)req->data;
308
309	EXTEND (SP, AvFILL (av) + 1);
310	for (i = 0; i <= AvFILL (av); ++i)
311	PUSHs (*av_fetch (av, i, 0));
312	}
313	break;
314
315	case REQ_NOP:
316	case REQ_SLEEP:
317	break;
318
319	default:
320	PUSHs (sv_2mortal (newSViv (req->result)));
321	break;
322	}
323
324
325	PUTBACK;
326	call_sv (req->callback, G_VOID | G_EVAL);	455	call_sv (req->callback, G_VOID | G_EVAL);
327	SPAGAIN;	456	SPAGAIN;
328		457
329	FREETMPS;	458	FREETMPS;
330	LEAVE;	459	LEAVE;
331
332	errno = errorno;
333
334	if (SvTRUE (ERRSV))
335	{	460	}
336	req_free (req);
337	croak (0);
338	}
339	}
340		461
341	static void req_free (aio_req req)
342	{
343	if (req->grp)	462	if (req->grp)
344	{	463	{
345	aio_req grp = req->grp;	464	aio_req grp = req->grp;
346		465
347	/* unlink request */	466	/* unlink request */
…		…
352	grp->grp_first = req->grp_next;	471	grp->grp_first = req->grp_next;
353		472
354	aio_grp_dec (grp);	473	aio_grp_dec (grp);
355	}	474	}
356		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	{
357	if (req->self)	485	if (req->self)
358	{	486	{
359	sv_unmagic (req->self, PERL_MAGIC_ext);	487	sv_unmagic (req->self, PERL_MAGIC_ext);
360	SvREFCNT_dec (req->self);	488	SvREFCNT_dec (req->self);
361	}	489	}
…		…
364	SvREFCNT_dec (req->fh);	492	SvREFCNT_dec (req->fh);
365	SvREFCNT_dec (req->fh2);	493	SvREFCNT_dec (req->fh2);
366	SvREFCNT_dec (req->callback);	494	SvREFCNT_dec (req->callback);
367	Safefree (req->statdata);	495	Safefree (req->statdata);
368		496
369	if (req->type == REQ_READDIR && req->result >= 0)	497	if (req->type == REQ_READDIR)
370	free (req->data2ptr);	498	free (req->data2ptr);
371		499
372	Safefree (req);	500	Safefree (req);
373	}	501	}
374		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
375	static void req_cancel (aio_req req)	517	static void req_cancel (aio_req req)
376	{	518	{
377	req->flags |= FLAG_CANCELLED;	519	req->flags |= FLAG_CANCELLED;
378		520
379	if (req->type == REQ_GROUP)	521	req_cancel_subs (req);
380	{	522	}
381	aio_req sub;
382		523
383	for (sub = req->grp_first; sub; sub = sub->grp_next)	524	static void *aio_proc(void *arg);
384	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)
385	}	549	{
386	}	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);
387		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
388	static int poll_cb ()	645	static int poll_cb (int max)
389	{	646	{
390	dSP;	647	dSP;
391	int count = 0;	648	int count = 0;
392	int do_croak = 0;	649	int do_croak = 0;
393	aio_req req;	650	aio_req req;
394		651
395	for (;;)	652	for (;;)
396	{	653	{
397	pthread_mutex_lock (&reslock);	654	while (max <= 0 || count < max)
398	req = ress;
399
400	if (req)
401	{	655	{
402	ress = req->next;	656	maybe_start_thread ();
403		657
		658	LOCK (reslock);
		659	req = reqq_shift (&res_queue);
		660
404	if (!ress)	661	if (req)
405	{	662	{
		663	--npending;
		664
		665	if (!res_queue.size)
		666	{
406	/* read any signals sent by the worker threads */	667	/* read any signals sent by the worker threads */
407	char buf [32];	668	char buf [32];
408	while (read (respipe [0], buf, 32) == 32)	669	while (read (respipe [0], buf, 32) == 32)
		670	;
409	;	671	}
410
411	rese = 0;
412	}	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);
413	}	707	}
414		708
415	pthread_mutex_unlock (&reslock);	709	if (nreqs <= max_outstanding)
416
417	if (!req)
418	break;	710	break;
419		711
420	--nreqs;	712	poll_wait ();
421		713
422	if (req->type == REQ_QUIT)	714	max = 0;
423	started--;
424	else if (req->type == REQ_GROUP && req->length)
425	{
426	req->fd = 1; /* mark request as delayed */
427	continue;
428	}
429	else
430	{
431	if (req->type == REQ_READ)
432	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
433
434	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
435	SvREADONLY_off (req->data);
436
437	if (req->statdata)
438	{
439	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
440	PL_laststatval = req->result;
441	PL_statcache = *(req->statdata);
442	}
443
444	req_invoke (req);
445
446	count++;
447	}
448
449	req_free (req);
450	}	715	}
451		716
452	return count;	717	return count;
453	}
454
455	static void *aio_proc(void *arg);
456
457	static void start_thread (void)
458	{
459	sigset_t fullsigset, oldsigset;
460	pthread_t tid;
461	pthread_attr_t attr;
462
463	pthread_attr_init (&attr);
464	pthread_attr_setstacksize (&attr, STACKSIZE);
465	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
466
467	sigfillset (&fullsigset);
468	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
469
470	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
471	started++;
472
473	sigprocmask (SIG_SETMASK, &oldsigset, 0);
474	}
475
476	static void req_send (aio_req req)
477	{
478	while (started < wanted && nreqs >= started)
479	start_thread ();
480
481	++nreqs;
482
483	pthread_mutex_lock (&reqlock);
484
485	req->next = 0;
486
487	if (reqe)
488	{
489	reqe->next = req;
490	reqe = req;
491	}
492	else
493	reqe = reqs = req;
494
495	pthread_cond_signal (&reqwait);
496	pthread_mutex_unlock (&reqlock);
497
498	if (nreqs > max_outstanding)
499	for (;;)
500	{
501	poll_cb ();
502
503	if (nreqs <= max_outstanding)
504	break;
505
506	poll_wait ();
507	}
508	}
509
510	static void end_thread (void)
511	{
512	aio_req req;
513	Newz (0, req, 1, aio_cb);
514	req->type = REQ_QUIT;
515
516	req_send (req);
517	}
518
519	static void min_parallel (int nthreads)
520	{
521	if (wanted < nthreads)
522	wanted = nthreads;
523	}
524
525	static void max_parallel (int nthreads)
526	{
527	int cur = started;
528
529	if (wanted > nthreads)
530	wanted = nthreads;
531
532	while (cur > wanted)
533	{
534	end_thread ();
535	cur--;
536	}
537
538	while (started > wanted)
539	{
540	poll_wait ();
541	poll_cb ();
542	}
543	}	718	}
544		719
545	static void create_pipe ()	720	static void create_pipe ()
546	{	721	{
547	if (pipe (respipe))	722	if (pipe (respipe))
…		…
571	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)
572	{	747	{
573	ssize_t res;	748	ssize_t res;
574	off_t ooffset;	749	off_t ooffset;
575		750
576	pthread_mutex_lock (&preadwritelock);	751	LOCK (preadwritelock);
577	ooffset = lseek (fd, 0, SEEK_CUR);	752	ooffset = lseek (fd, 0, SEEK_CUR);
578	lseek (fd, offset, SEEK_SET);	753	lseek (fd, offset, SEEK_SET);
579	res = read (fd, buf, count);	754	res = read (fd, buf, count);
580	lseek (fd, ooffset, SEEK_SET);	755	lseek (fd, ooffset, SEEK_SET);
581	pthread_mutex_unlock (&preadwritelock);	756	UNLOCK (preadwritelock);
582		757
583	return res;	758	return res;
584	}	759	}
585		760
586	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)
587	{	762	{
588	ssize_t res;	763	ssize_t res;
589	off_t ooffset;	764	off_t ooffset;
590		765
591	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
592	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
593	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
594	res = write (fd, buf, count);	769	res = write (fd, buf, count);
595	lseek (fd, offset, SEEK_SET);	770	lseek (fd, offset, SEEK_SET);
596	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
597		772
598	return res;	773	return res;
599	}	774	}
600	#endif	775	#endif
601		776
602	#if !HAVE_FDATASYNC	777	#if !HAVE_FDATASYNC
603	# define fdatasync fsync	778	# define fdatasync fsync
604	#endif	779	#endif
605		780
606	#if !HAVE_READAHEAD	781	#if !HAVE_READAHEAD
607	# define readahead aio_readahead	782	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
608		783
609	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)
610	{	785	{
611	dBUF;	786	dBUF;
612		787
613	while (count > 0)	788	while (count > 0)
614	{	789	{
…		…
617	pread (fd, aio_buf, len, offset);	792	pread (fd, aio_buf, len, offset);
618	offset += len;	793	offset += len;
619	count -= len;	794	count -= len;
620	}	795	}
621		796
622	fBUF;
623
624	errno = 0;	797	errno = 0;
625	}	798	}
		799
626	#endif	800	#endif
627		801
628	#if !HAVE_READDIR_R	802	#if !HAVE_READDIR_R
629	# define readdir_r aio_readdir_r	803	# define readdir_r aio_readdir_r
630		804
…		…
633	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)
634	{	808	{
635	struct dirent *e;	809	struct dirent *e;
636	int errorno;	810	int errorno;
637		811
638	pthread_mutex_lock (&readdirlock);	812	LOCK (readdirlock);
639		813
640	e = readdir (dirp);	814	e = readdir (dirp);
641	errorno = errno;	815	errorno = errno;
642		816
643	if (e)	817	if (e)
…		…
646	strcpy (ent->d_name, e->d_name);	820	strcpy (ent->d_name, e->d_name);
647	}	821	}
648	else	822	else
649	*res = 0;	823	*res = 0;
650		824
651	pthread_mutex_unlock (&readdirlock);	825	UNLOCK (readdirlock);
652		826
653	errno = errorno;	827	errno = errorno;
654	return e ? 0 : -1;	828	return e ? 0 : -1;
655	}	829	}
656	#endif	830	#endif
657		831
658	/* sendfile always needs emulation */	832	/* sendfile always needs emulation */
659	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)
660	{	834	{
661	ssize_t res;	835	ssize_t res;
662		836
663	if (!count)	837	if (!count)
664	return 0;	838	return 0;
…		…
675	{	849	{
676	off_t sbytes;	850	off_t sbytes;
677	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	851	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
678		852
679	if (res < 0 && sbytes)	853	if (res < 0 && sbytes)
680	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	854	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
681	res = sbytes;	855	res = sbytes;
682	}	856	}
683		857
684	# elif __hpux	858	# elif __hpux
685	res = sendfile (ofd, ifd, offset, count, 0, 0);	859	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
741		915
742	offset += cnt;	916	offset += cnt;
743	res += cnt;	917	res += cnt;
744	count -= cnt;	918	count -= cnt;
745	}	919	}
746
747	fBUF;
748	}	920	}
749		921
750	return res;	922	return res;
751	}	923	}
752		924
753	/* read a full directory */	925	/* read a full directory */
754	static int scandir_ (const char *path, void **namesp)	926	static void scandir_ (aio_req req, worker *self)
755	{	927	{
756	DIR *dirp;	928	DIR *dirp;
757	union	929	union
758	{	930	{
759	struct dirent d;	931	struct dirent d;
…		…
764	int memlen = 4096;	936	int memlen = 4096;
765	int memofs = 0;	937	int memofs = 0;
766	int res = 0;	938	int res = 0;
767	int errorno;	939	int errorno;
768		940
769	dirp = opendir (path);	941	LOCK (wrklock);
770	if (!dirp)	942	self->dirp = dirp = opendir (req->dataptr);
771	return -1;
772
773	u = malloc (sizeof (*u));	943	self->dbuf = u = malloc (sizeof (*u));
774	names = malloc (memlen);	944	req->data2ptr = names = malloc (memlen);
		945	UNLOCK (wrklock);
775		946
776	if (u && names)	947	if (dirp && u && names)
777	for (;;)	948	for (;;)
778	{	949	{
779	errno = 0;	950	errno = 0;
780	readdir_r (dirp, &u->d, &entp);	951	readdir_r (dirp, &u->d, &entp);
781		952
…		…
791	res++;	962	res++;
792		963
793	while (memofs + len > memlen)	964	while (memofs + len > memlen)
794	{	965	{
795	memlen *= 2;	966	memlen *= 2;
		967	LOCK (wrklock);
796	names = realloc (names, memlen);	968	req->data2ptr = names = realloc (names, memlen);
		969	UNLOCK (wrklock);
		970
797	if (!names)	971	if (!names)
798	break;	972	break;
799	}	973	}
800		974
801	memcpy (names + memofs, name, len);	975	memcpy (names + memofs, name, len);
802	memofs += len;	976	memofs += len;
803	}	977	}
804	}	978	}
805		979
806	errorno = errno;
807	free (u);
808	closedir (dirp);
809
810	if (errorno)	980	if (errno)
811	{
812	free (names);
813	errno = errorno;
814	res = -1;	981	res = -1;
815	}	982
816		983	req->result = res;
817	*namesp = (void *)names;
818	return res;
819	}	984	}
820		985
821	/*****************************************************************************/	986	/*****************************************************************************/
822		987
823	static void *aio_proc (void *thr_arg)	988	static void *aio_proc (void *thr_arg)
824	{	989	{
825	aio_req req;	990	aio_req req;
826	int type;	991	struct timespec ts;
		992	worker *self = (worker *)thr_arg;
827		993
828	do	994	/* try to distribute timeouts somewhat evenly */
		995	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		996	* (1000000000UL / 1024UL);
		997
		998	for (;;)
829	{	999	{
830	pthread_mutex_lock (&reqlock);	1000	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1001
		1002	LOCK (reqlock);
831		1003
832	for (;;)	1004	for (;;)
833	{	1005	{
834	req = reqs;	1006	self->req = req = reqq_shift (&req_queue);
835
836	if (reqs)
837	{
838	reqs = reqs->next;
839	if (!reqs) reqe = 0;
840	}
841		1007
842	if (req)	1008	if (req)
843	break;	1009	break;
844		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 */
845	pthread_cond_wait (&reqwait, &reqlock);	1027	pthread_cond_wait (&reqwait, &reqlock);
		1028	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1029	}
		1030
		1031	--idle;
846	}	1032	}
847		1033
848	pthread_mutex_unlock (&reqlock);	1034	--nready;
		1035
		1036	UNLOCK (reqlock);
849		1037
850	errno = 0; /* strictly unnecessary */	1038	errno = 0; /* strictly unnecessary */
851	type = req->type; /* remember type for QUIT check */
852		1039
853	if (!(req->flags & FLAG_CANCELLED))	1040	if (!(req->flags & FLAG_CANCELLED))
854	switch (type)	1041	switch (req->type)
855	{	1042	{
856	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;
857	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;
858		1045
859	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;
860	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;
861		1048
862	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1049	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
863	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1050	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
864	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1051	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
865		1052
…		…
868	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1055	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
869	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1056	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
870	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1057	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
871	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1058	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
872	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;
873		1061
874	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1062	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
875	case REQ_FSYNC: req->result = fsync (req->fd); break;	1063	case REQ_FSYNC: req->result = fsync (req->fd); break;
876	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1064	case REQ_READDIR: scandir_ (req, self); break;
877		1065
878	case REQ_SLEEP:	1066	case REQ_BUSY:
879	{	1067	{
880	struct timeval tv;	1068	struct timeval tv;
881		1069
882	tv.tv_sec = req->fd;	1070	tv.tv_sec = req->fd;
883	tv.tv_usec = req->fd2;	1071	tv.tv_usec = req->fd2;
…		…
885	req->result = select (0, 0, 0, 0, &tv);	1073	req->result = select (0, 0, 0, 0, &tv);
886	}	1074	}
887		1075
888	case REQ_GROUP:	1076	case REQ_GROUP:
889	case REQ_NOP:	1077	case REQ_NOP:
		1078	break;
		1079
890	case REQ_QUIT:	1080	case REQ_QUIT:
891	break;	1081	goto quit;
892		1082
893	default:	1083	default:
894	req->result = ENOSYS;	1084	req->result = ENOSYS;
895	break;	1085	break;
896	}	1086	}
897		1087
898	req->errorno = errno;	1088	req->errorno = errno;
899		1089
900	pthread_mutex_lock (&reslock);	1090	LOCK (reslock);
901		1091
902	req->next = 0;	1092	++npending;
903		1093
904	if (rese)	1094	if (!reqq_push (&res_queue, req))
905	{
906	rese->next = req;
907	rese = req;
908	}
909	else
910	{
911	rese = ress = req;
912
913	/* write a dummy byte to the pipe so fh becomes ready */	1095	/* write a dummy byte to the pipe so fh becomes ready */
914	write (respipe [1], &respipe, 1);	1096	write (respipe [1], &respipe, 1);
915	}
916		1097
917	pthread_mutex_unlock (&reslock);	1098	self->req = 0;
		1099	worker_clear (self);
		1100
		1101	UNLOCK (reslock);
918	}	1102	}
919	while (type != REQ_QUIT);	1103
		1104	quit:
		1105	LOCK (wrklock);
		1106	worker_free (self);
		1107	UNLOCK (wrklock);
920		1108
921	return 0;	1109	return 0;
922	}	1110	}
923		1111
924	/*****************************************************************************/	1112	/*****************************************************************************/
925		1113
926	static void atfork_prepare (void)	1114	static void atfork_prepare (void)
927	{	1115	{
928	pthread_mutex_lock (&reqlock);	1116	LOCK (wrklock);
929	pthread_mutex_lock (&reslock);	1117	LOCK (reqlock);
		1118	LOCK (reslock);
930	#if !HAVE_PREADWRITE	1119	#if !HAVE_PREADWRITE
931	pthread_mutex_lock (&preadwritelock);	1120	LOCK (preadwritelock);
932	#endif	1121	#endif
933	#if !HAVE_READDIR_R	1122	#if !HAVE_READDIR_R
934	pthread_mutex_lock (&readdirlock);	1123	LOCK (readdirlock);
935	#endif	1124	#endif
936	}	1125	}
937		1126
938	static void atfork_parent (void)	1127	static void atfork_parent (void)
939	{	1128	{
940	#if !HAVE_READDIR_R	1129	#if !HAVE_READDIR_R
941	pthread_mutex_unlock (&readdirlock);	1130	UNLOCK (readdirlock);
942	#endif	1131	#endif
943	#if !HAVE_PREADWRITE	1132	#if !HAVE_PREADWRITE
944	pthread_mutex_unlock (&preadwritelock);	1133	UNLOCK (preadwritelock);
945	#endif	1134	#endif
946	pthread_mutex_unlock (&reslock);	1135	UNLOCK (reslock);
947	pthread_mutex_unlock (&reqlock);	1136	UNLOCK (reqlock);
		1137	UNLOCK (wrklock);
948	}	1138	}
949		1139
950	static void atfork_child (void)	1140	static void atfork_child (void)
951	{	1141	{
952	aio_req prv;	1142	aio_req prv;
953		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
954	started = 0;	1161	started = 0;
955		1162	idle = 0;
956	while (reqs)	1163	nreqs = 0;
957	{	1164	nready = 0;
958	prv = reqs;	1165	npending = 0;
959	reqs = prv->next;
960	req_free (prv);
961	}
962
963	reqs = reqe = 0;
964
965	while (ress)
966	{
967	prv = ress;
968	ress = prv->next;
969	req_free (prv);
970	}
971
972	ress = rese = 0;
973		1166
974	close (respipe [0]);	1167	close (respipe [0]);
975	close (respipe [1]);	1168	close (respipe [1]);
976	create_pipe ();	1169	create_pipe ();
977		1170
…		…
1004	PROTOTYPES: ENABLE	1197	PROTOTYPES: ENABLE
1005		1198
1006	BOOT:	1199	BOOT:
1007	{	1200	{
1008	HV *stash = gv_stashpv ("IO::AIO", 1);	1201	HV *stash = gv_stashpv ("IO::AIO", 1);
		1202
1009	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1203	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1010	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1204	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1011	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));
1012		1209
1013	create_pipe ();	1210	create_pipe ();
1014	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1211	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1015	}	1212	}
1016		1213
1017	void	1214	void
1018	min_parallel (nthreads)	1215	min_parallel (int nthreads)
1019	int nthreads
1020	PROTOTYPE: $	1216	PROTOTYPE: $
1021		1217
1022	void	1218	void
1023	max_parallel (nthreads)	1219	max_parallel (int nthreads)
1024	int nthreads
1025	PROTOTYPE: $	1220	PROTOTYPE: $
1026		1221
1027	int	1222	int
1028	max_outstanding (nreqs)	1223	max_outstanding (int maxreqs)
1029	int nreqs	1224	PROTOTYPE: $
1030	PROTOTYPE: $
1031	CODE:	1225	CODE:
1032	RETVAL = max_outstanding;	1226	RETVAL = max_outstanding;
1033	max_outstanding = nreqs;	1227	max_outstanding = maxreqs;
		1228	OUTPUT:
		1229	RETVAL
1034		1230
1035	void	1231	void
1036	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1232	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1037	SV * pathname	1233	SV * pathname
1038	int flags	1234	int flags
…		…
1253		1449
1254	REQ_SEND;	1450	REQ_SEND;
1255	}	1451	}
1256		1452
1257	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
1258	aio_sleep (delay,callback=&PL_sv_undef)	1473	aio_busy (delay,callback=&PL_sv_undef)
1259	double delay	1474	double delay
1260	SV * callback	1475	SV * callback
1261	PPCODE:	1476	PPCODE:
1262	{	1477	{
1263	dREQ;	1478	dREQ;
1264		1479
1265	req->type = REQ_SLEEP;	1480	req->type = REQ_BUSY;
1266	req->fd = delay < 0. ? 0 : delay;	1481	req->fd = delay < 0. ? 0 : delay;
1267	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1482	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1268		1483
1269	REQ_SEND;	1484	REQ_SEND;
1270	}	1485	}
…		…
1293	req->type = REQ_NOP;	1508	req->type = REQ_NOP;
1294		1509
1295	REQ_SEND;	1510	REQ_SEND;
1296	}	1511	}
1297		1512
1298	#if 0	1513	int
1299		1514	aioreq_pri (int pri = 0)
1300	void	1515	PROTOTYPE: ;$
1301	aio_pri (int pri = DEFAULT_PRI)
1302	CODE:	1516	CODE:
		1517	RETVAL = next_pri - PRI_BIAS;
		1518	if (items > 0)
		1519	{
1303	if (pri < PRI_MIN) pri = PRI_MIN;	1520	if (pri < PRI_MIN) pri = PRI_MIN;
1304	if (pri > PRI_MAX) pri = PRI_MAX;	1521	if (pri > PRI_MAX) pri = PRI_MAX;
1305	next_pri = pri + PRI_BIAS;	1522	next_pri = pri + PRI_BIAS;
		1523	}
		1524	OUTPUT:
		1525	RETVAL
1306		1526
1307	#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;
1308		1534
1309	void	1535	void
1310	flush ()	1536	flush ()
1311	PROTOTYPE:	1537	PROTOTYPE:
1312	CODE:	1538	CODE:
1313	while (nreqs)	1539	while (nreqs)
1314	{	1540	{
1315	poll_wait ();	1541	poll_wait ();
1316	poll_cb ();	1542	poll_cb (0);
1317	}	1543	}
1318		1544
1319	void	1545	void
1320	poll()	1546	poll()
1321	PROTOTYPE:	1547	PROTOTYPE:
1322	CODE:	1548	CODE:
1323	if (nreqs)	1549	if (nreqs)
1324	{	1550	{
1325	poll_wait ();	1551	poll_wait ();
1326	poll_cb ();	1552	poll_cb (0);
1327	}	1553	}
1328		1554
1329	int	1555	int
1330	poll_fileno()	1556	poll_fileno()
1331	PROTOTYPE:	1557	PROTOTYPE:
…		…
1336		1562
1337	int	1563	int
1338	poll_cb(...)	1564	poll_cb(...)
1339	PROTOTYPE:	1565	PROTOTYPE:
1340	CODE:	1566	CODE:
1341	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);
1342	OUTPUT:	1576	OUTPUT:
1343	RETVAL	1577	RETVAL
1344		1578
1345	void	1579	void
1346	poll_wait()	1580	poll_wait()
…		…
1355	CODE:	1589	CODE:
1356	RETVAL = nreqs;	1590	RETVAL = nreqs;
1357	OUTPUT:	1591	OUTPUT:
1358	RETVAL	1592	RETVAL
1359		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
1360	PROTOTYPES: DISABLE	1610	PROTOTYPES: DISABLE
1361		1611
1362	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1612	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1363		1613
1364	void	1614	void
1365	cancel (aio_req_ornot req)	1615	cancel (aio_req_ornot req)
1366	PROTOTYPE:
1367	CODE:	1616	CODE:
1368	req_cancel (req);	1617	req_cancel (req);
1369		1618
1370	void	1619	void
1371	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1620	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
…		…
1407	}	1656	}
1408	}	1657	}
1409	}	1658	}
1410		1659
1411	void	1660	void
		1661	cancel_subs (aio_req_ornot req)
		1662	CODE:
		1663	req_cancel_subs (req);
		1664
		1665	void
1412	result (aio_req grp, ...)	1666	result (aio_req grp, ...)
1413	CODE:	1667	CODE:
1414	{	1668	{
1415	int i;	1669	int i;
		1670	AV *av;
		1671
		1672	grp->errorno = errno;
		1673
1416	AV *av = newAV ();	1674	av = newAV ();
1417		1675
1418	for (i = 1; i < items; ++i )	1676	for (i = 1; i < items; ++i )
1419	av_push (av, newSVsv (ST (i)));	1677	av_push (av, newSVsv (ST (i)));
1420		1678
1421	SvREFCNT_dec (grp->data);	1679	SvREFCNT_dec (grp->data);
1422	grp->data = (SV *)av;	1680	grp->data = (SV *)av;
1423	}	1681	}
1424		1682
1425	void	1683	void
		1684	errno (aio_req grp, int errorno = errno)
		1685	CODE:
		1686	grp->errorno = errorno;
		1687
		1688	void
1426	feed_limit (aio_req grp, int limit)	1689	limit (aio_req grp, int limit)
1427	CODE:	1690	CODE:
1428	grp->fd2 = limit;	1691	grp->fd2 = limit;
1429	aio_grp_feed (grp);	1692	aio_grp_feed (grp);
1430		1693
1431	void	1694	void

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