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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.61 by root, Mon Oct 23 22:44:21 2006 UTC vs.
Revision 1.84 by root, Sat Oct 28 01:24:19 2006 UTC

		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
		5	# define _GNU_SOURCE
		6	#endif
		7
		8	/* just in case */
1	#define _REENTRANT 1	9	#define _REENTRANT 1
		10
2	#include <errno.h>	11	#include <errno.h>
3		12
4	#include "EXTERN.h"	13	#include "EXTERN.h"
5	#include "perl.h"	14	#include "perl.h"
6	#include "XSUB.h"	15	#include "XSUB.h"
…		…
34	# else	43	# else
35	# error sendfile support requested but not available	44	# error sendfile support requested but not available
36	# endif	45	# endif
37	#endif	46	#endif
38		47
		48	/* number of seconds after which idle threads exit */
		49	#define IDLE_TIMEOUT 10
		50
39	/* used for struct dirent, AIX doesn't provide it */	51	/* used for struct dirent, AIX doesn't provide it */
40	#ifndef NAME_MAX	52	#ifndef NAME_MAX
41	# define NAME_MAX 4096	53	# define NAME_MAX 4096
42	#endif	54	#endif
43		55
		56	#ifndef PTHREAD_STACK_MIN
		57	/* care for broken platforms, e.g. windows */
		58	# define PTHREAD_STACK_MIN 16384
		59	#endif
		60
44	#if __ia64	61	#if __ia64
45	# define STACKSIZE 65536	62	# define STACKSIZE 65536
		63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		64	# define STACKSIZE PTHREAD_STACK_MIN
46	#else	65	#else
47	# 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
48	#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;
49		91
50	enum {	92	enum {
51	REQ_QUIT,	93	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,	94	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,	96	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,	98	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,	100	REQ_MKNOD, REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,	101	REQ_LINK, REQ_SYMLINK,
60	REQ_GROUP, REQ_NOP,	102	REQ_GROUP, REQ_NOP,
61	REQ_SLEEP,	103	REQ_BUSY,
62	};	104	};
63		105
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	106	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	107	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		108
…		…
100	PRI_MIN = -4,	142	PRI_MIN = -4,
101	PRI_MAX = 4,	143	PRI_MAX = 4,
102		144
103	DEFAULT_PRI = 0,	145	DEFAULT_PRI = 0,
104	PRI_BIAS = -PRI_MIN,	146	PRI_BIAS = -PRI_MIN,
		147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
105	};	148	};
106		149
107	static int next_pri = DEFAULT_PRI + PRI_BIAS;	150	static int next_pri = DEFAULT_PRI + PRI_BIAS;
108		151
109	static int started, wanted;	152	static unsigned int started, idle, wanted;
110	static volatile int nreqs;	153
111	static int max_outstanding = 1<<30;	154	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		155	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		156	#else
		157	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		158	#endif
		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;
112	static int respipe [2];	206	static int respipe [2];
113		207
114	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	208	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
115	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	209	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
116	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	210	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
117		211
118	static volatile aio_req reqs, reqe; /* queue start, queue end */	212	#if WORDREAD_UNSAFE
119	static volatile aio_req ress, rese; /* queue start, queue end */
120		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);
121	static void req_invoke (aio_req req);	298	static void req_invoke (aio_req req);
122	static void req_free (aio_req req);	299	static void req_free (aio_req req);
		300	static void req_cancel (aio_req req);
123		301
124	/* must be called at most once */	302	/* must be called at most once */
125	static SV *req_sv (aio_req req, const char *klass)	303	static SV *req_sv (aio_req req, const char *klass)
126	{	304	{
127	if (!req->self)	305	if (!req->self)
…		…
158	ENTER;	336	ENTER;
159	SAVETMPS;	337	SAVETMPS;
160	PUSHMARK (SP);	338	PUSHMARK (SP);
161	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	339	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
162	PUTBACK;	340	PUTBACK;
163	call_sv (grp->fh2, G_VOID | G_EVAL);	341	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
164	SPAGAIN;	342	SPAGAIN;
165	FREETMPS;	343	FREETMPS;
166	LEAVE;	344	LEAVE;
167	}	345	}
168		346
…		…
189	req_invoke (grp);	367	req_invoke (grp);
190	req_free (grp);	368	req_free (grp);
191	}	369	}
192	}	370	}
193		371
194	static void poll_wait ()
195	{
196	while (nreqs)
197	{
198	aio_req req;
199	pthread_mutex_lock (&reslock);
200	req = ress;
201	pthread_mutex_unlock (&reslock);
202
203	if (req)
204	return;
205
206	fd_set rfd;
207	FD_ZERO(&rfd);
208	FD_SET(respipe [0], &rfd);
209
210	select (respipe [0] + 1, &rfd, 0, 0, 0);
211	}
212	}
213
214	static void req_invoke (aio_req req)	372	static void req_invoke (aio_req req)
215	{	373	{
216	dSP;	374	dSP;
217	int errorno = errno;
218		375
219	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))	376	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
220	return;	377	{
221
222	errno = req->errorno;
223
224	ENTER;	378	ENTER;
225	SAVETMPS;	379	SAVETMPS;
226	PUSHMARK (SP);	380	PUSHMARK (SP);
227	EXTEND (SP, 1);	381	EXTEND (SP, 1);
228		382
229	switch (req->type)	383	switch (req->type)
230	{
231	case REQ_READDIR:
232	{	384	{
233	SV *rv = &PL_sv_undef;	385	case REQ_READDIR:
234
235	if (req->result >= 0)
236	{	386	{
237	char *buf = req->data2ptr;	387	SV *rv = &PL_sv_undef;
238	AV *av = newAV ();
239		388
240	while (req->result)	389	if (req->result >= 0)
241	{	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	{
242	SV *sv = newSVpv (buf, 0);	399	SV *sv = newSVpv (buf, 0);
243		400
244	av_push (av, sv);	401	av_store (av, i, sv);
245	buf += SvCUR (sv) + 1;	402	buf += SvCUR (sv) + 1;
246	req->result--;	403	}
		404
		405	rv = sv_2mortal (newRV_noinc ((SV *)av));
247	}	406	}
248		407
249	rv = sv_2mortal (newRV_noinc ((SV *)av));	408	PUSHs (rv);
250	}	409	}
		410	break;
251		411
252	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;
253	}	450	}
254	break;
255		451
256	case REQ_OPEN:	452	errno = req->errorno;
257	{
258	/* convert fd to fh */
259	SV *fh;
260		453
261	PUSHs (sv_2mortal (newSViv (req->result)));
262	PUTBACK;	454	PUTBACK;
263	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
264	SPAGAIN;
265
266	fh = SvREFCNT_inc (POPs);
267
268	PUSHMARK (SP);
269	XPUSHs (sv_2mortal (fh));
270	}
271	break;
272
273	case REQ_GROUP:
274	req->fd = 2; /* mark group as finished */
275
276	if (req->data)
277	{
278	int i;
279	AV *av = (AV *)req->data;
280
281	EXTEND (SP, AvFILL (av) + 1);
282	for (i = 0; i <= AvFILL (av); ++i)
283	PUSHs (*av_fetch (av, i, 0));
284	}
285	break;
286
287	case REQ_NOP:
288	case REQ_SLEEP:
289	break;
290
291	default:
292	PUSHs (sv_2mortal (newSViv (req->result)));
293	break;
294	}
295
296
297	PUTBACK;
298	call_sv (req->callback, G_VOID | G_EVAL);	455	call_sv (req->callback, G_VOID | G_EVAL);
299	SPAGAIN;	456	SPAGAIN;
300		457
301	FREETMPS;	458	FREETMPS;
302	LEAVE;	459	LEAVE;
303
304	errno = errorno;
305
306	if (SvTRUE (ERRSV))
307	{	460	}
308	req_free (req);
309	croak (0);
310	}
311	}
312		461
313	static void req_free (aio_req req)
314	{
315	if (req->grp)	462	if (req->grp)
316	{	463	{
317	aio_req grp = req->grp;	464	aio_req grp = req->grp;
318		465
319	/* unlink request */	466	/* unlink request */
…		…
324	grp->grp_first = req->grp_next;	471	grp->grp_first = req->grp_next;
325		472
326	aio_grp_dec (grp);	473	aio_grp_dec (grp);
327	}	474	}
328		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	{
329	if (req->self)	485	if (req->self)
330	{	486	{
331	sv_unmagic (req->self, PERL_MAGIC_ext);	487	sv_unmagic (req->self, PERL_MAGIC_ext);
332	SvREFCNT_dec (req->self);	488	SvREFCNT_dec (req->self);
333	}	489	}
…		…
336	SvREFCNT_dec (req->fh);	492	SvREFCNT_dec (req->fh);
337	SvREFCNT_dec (req->fh2);	493	SvREFCNT_dec (req->fh2);
338	SvREFCNT_dec (req->callback);	494	SvREFCNT_dec (req->callback);
339	Safefree (req->statdata);	495	Safefree (req->statdata);
340		496
341	if (req->type == REQ_READDIR && req->result >= 0)	497	if (req->type == REQ_READDIR)
342	free (req->data2ptr);	498	free (req->data2ptr);
343		499
344	Safefree (req);	500	Safefree (req);
345	}	501	}
346		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
347	static void req_cancel (aio_req req)	517	static void req_cancel (aio_req req)
348	{	518	{
349	req->flags |= FLAG_CANCELLED;	519	req->flags |= FLAG_CANCELLED;
350		520
351	if (req->type == REQ_GROUP)	521	req_cancel_subs (req);
352	{	522	}
353	aio_req sub;
354		523
355	for (sub = req->grp_first; sub; sub = sub->grp_next)	524	static void *aio_proc(void *arg);
356	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)
357	}	549	{
358	}	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);
359		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
360	static int poll_cb ()	645	static int poll_cb (int max)
361	{	646	{
362	dSP;	647	dSP;
363	int count = 0;	648	int count = 0;
364	int do_croak = 0;	649	int do_croak = 0;
365	aio_req req;	650	aio_req req;
366		651
367	for (;;)	652	for (;;)
368	{	653	{
369	pthread_mutex_lock (&reslock);	654	while (max <= 0 || count < max)
370	req = ress;
371
372	if (req)
373	{	655	{
374	ress = req->next;	656	maybe_start_thread ();
375		657
		658	LOCK (reslock);
		659	req = reqq_shift (&res_queue);
		660
376	if (!ress)	661	if (req)
377	{	662	{
		663	--npending;
		664
		665	if (!res_queue.size)
		666	{
378	/* read any signals sent by the worker threads */	667	/* read any signals sent by the worker threads */
379	char buf [32];	668	char buf [32];
380	while (read (respipe [0], buf, 32) == 32)	669	while (read (respipe [0], buf, 32) == 32)
		670	;
381	;	671	}
382
383	rese = 0;
384	}	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);
385	}	707	}
386		708
387	pthread_mutex_unlock (&reslock);	709	if (nreqs <= max_outstanding)
388
389	if (!req)
390	break;	710	break;
391		711
392	--nreqs;	712	poll_wait ();
393		713
394	if (req->type == REQ_QUIT)	714	max = 0;
395	started--;
396	else if (req->type == REQ_GROUP && req->length)
397	{
398	req->fd = 1; /* mark request as delayed */
399	continue;
400	}
401	else
402	{
403	if (req->type == REQ_READ)
404	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
405
406	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
407	SvREADONLY_off (req->data);
408
409	if (req->statdata)
410	{
411	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
412	PL_laststatval = req->result;
413	PL_statcache = *(req->statdata);
414	}
415
416	req_invoke (req);
417
418	count++;
419	}
420
421	req_free (req);
422	}	715	}
423		716
424	return count;	717	return count;
425	}
426
427	static void *aio_proc(void *arg);
428
429	static void start_thread (void)
430	{
431	sigset_t fullsigset, oldsigset;
432	pthread_t tid;
433	pthread_attr_t attr;
434
435	pthread_attr_init (&attr);
436	pthread_attr_setstacksize (&attr, STACKSIZE);
437	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
438
439	sigfillset (&fullsigset);
440	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
441
442	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
443	started++;
444
445	sigprocmask (SIG_SETMASK, &oldsigset, 0);
446	}
447
448	static void req_send (aio_req req)
449	{
450	while (started < wanted && nreqs >= started)
451	start_thread ();
452
453	++nreqs;
454
455	pthread_mutex_lock (&reqlock);
456
457	req->next = 0;
458
459	if (reqe)
460	{
461	reqe->next = req;
462	reqe = req;
463	}
464	else
465	reqe = reqs = req;
466
467	pthread_cond_signal (&reqwait);
468	pthread_mutex_unlock (&reqlock);
469
470	if (nreqs > max_outstanding)
471	for (;;)
472	{
473	poll_cb ();
474
475	if (nreqs <= max_outstanding)
476	break;
477
478	poll_wait ();
479	}
480	}
481
482	static void end_thread (void)
483	{
484	aio_req req;
485	Newz (0, req, 1, aio_cb);
486	req->type = REQ_QUIT;
487
488	req_send (req);
489	}
490
491	static void min_parallel (int nthreads)
492	{
493	if (wanted < nthreads)
494	wanted = nthreads;
495	}
496
497	static void max_parallel (int nthreads)
498	{
499	int cur = started;
500
501	if (wanted > nthreads)
502	wanted = nthreads;
503
504	while (cur > wanted)
505	{
506	end_thread ();
507	cur--;
508	}
509
510	while (started > wanted)
511	{
512	poll_wait ();
513	poll_cb ();
514	}
515	}	718	}
516		719
517	static void create_pipe ()	720	static void create_pipe ()
518	{	721	{
519	if (pipe (respipe))	722	if (pipe (respipe))
…		…
543	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)
544	{	747	{
545	ssize_t res;	748	ssize_t res;
546	off_t ooffset;	749	off_t ooffset;
547		750
548	pthread_mutex_lock (&preadwritelock);	751	LOCK (preadwritelock);
549	ooffset = lseek (fd, 0, SEEK_CUR);	752	ooffset = lseek (fd, 0, SEEK_CUR);
550	lseek (fd, offset, SEEK_SET);	753	lseek (fd, offset, SEEK_SET);
551	res = read (fd, buf, count);	754	res = read (fd, buf, count);
552	lseek (fd, ooffset, SEEK_SET);	755	lseek (fd, ooffset, SEEK_SET);
553	pthread_mutex_unlock (&preadwritelock);	756	UNLOCK (preadwritelock);
554		757
555	return res;	758	return res;
556	}	759	}
557		760
558	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)
559	{	762	{
560	ssize_t res;	763	ssize_t res;
561	off_t ooffset;	764	off_t ooffset;
562		765
563	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
564	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
565	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
566	res = write (fd, buf, count);	769	res = write (fd, buf, count);
567	lseek (fd, offset, SEEK_SET);	770	lseek (fd, offset, SEEK_SET);
568	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
569		772
570	return res;	773	return res;
571	}	774	}
572	#endif	775	#endif
573		776
574	#if !HAVE_FDATASYNC	777	#if !HAVE_FDATASYNC
575	# define fdatasync fsync	778	# define fdatasync fsync
576	#endif	779	#endif
577		780
578	#if !HAVE_READAHEAD	781	#if !HAVE_READAHEAD
579	# define readahead aio_readahead	782	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
580		783
581	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)
582	{	785	{
583	char readahead_buf[4096];	786	dBUF;
584		787
585	while (count > 0)	788	while (count > 0)
586	{	789	{
587	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	790	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
588		791
589	pread (fd, readahead_buf, len, offset);	792	pread (fd, aio_buf, len, offset);
590	offset += len;	793	offset += len;
591	count -= len;	794	count -= len;
592	}	795	}
593		796
594	errno = 0;	797	errno = 0;
595	}	798	}
		799
596	#endif	800	#endif
597		801
598	#if !HAVE_READDIR_R	802	#if !HAVE_READDIR_R
599	# define readdir_r aio_readdir_r	803	# define readdir_r aio_readdir_r
600		804
…		…
603	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)
604	{	808	{
605	struct dirent *e;	809	struct dirent *e;
606	int errorno;	810	int errorno;
607		811
608	pthread_mutex_lock (&readdirlock);	812	LOCK (readdirlock);
609		813
610	e = readdir (dirp);	814	e = readdir (dirp);
611	errorno = errno;	815	errorno = errno;
612		816
613	if (e)	817	if (e)
…		…
616	strcpy (ent->d_name, e->d_name);	820	strcpy (ent->d_name, e->d_name);
617	}	821	}
618	else	822	else
619	*res = 0;	823	*res = 0;
620		824
621	pthread_mutex_unlock (&readdirlock);	825	UNLOCK (readdirlock);
622		826
623	errno = errorno;	827	errno = errorno;
624	return e ? 0 : -1;	828	return e ? 0 : -1;
625	}	829	}
626	#endif	830	#endif
627		831
628	/* sendfile always needs emulation */	832	/* sendfile always needs emulation */
629	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)
630	{	834	{
631	ssize_t res;	835	ssize_t res;
632		836
633	if (!count)	837	if (!count)
634	return 0;	838	return 0;
…		…
645	{	849	{
646	off_t sbytes;	850	off_t sbytes;
647	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	851	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
648		852
649	if (res < 0 && sbytes)	853	if (res < 0 && sbytes)
650	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	854	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
651	res = sbytes;	855	res = sbytes;
652	}	856	}
653		857
654	# elif __hpux	858	# elif __hpux
655	res = sendfile (ofd, ifd, offset, count, 0, 0);	859	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
683	#endif	887	#endif
684	)	888	)
685	)	889	)
686	{	890	{
687	/* emulate sendfile. this is a major pain in the ass */	891	/* emulate sendfile. this is a major pain in the ass */
688	char buf[4096];	892	dBUF;
		893
689	res = 0;	894	res = 0;
690		895
691	while (count)	896	while (count)
692	{	897	{
693	ssize_t cnt;	898	ssize_t cnt;
694		899
695	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	900	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
696		901
697	if (cnt <= 0)	902	if (cnt <= 0)
698	{	903	{
699	if (cnt && !res) res = -1;	904	if (cnt && !res) res = -1;
700	break;	905	break;
701	}	906	}
702		907
703	cnt = write (ofd, buf, cnt);	908	cnt = write (ofd, aio_buf, cnt);
704		909
705	if (cnt <= 0)	910	if (cnt <= 0)
706	{	911	{
707	if (cnt && !res) res = -1;	912	if (cnt && !res) res = -1;
708	break;	913	break;
…		…
716		921
717	return res;	922	return res;
718	}	923	}
719		924
720	/* read a full directory */	925	/* read a full directory */
721	static int scandir_ (const char *path, void **namesp)	926	static void scandir_ (aio_req req, worker *self)
722	{	927	{
723	DIR *dirp = opendir (path);	928	DIR *dirp;
724	union	929	union
725	{	930	{
726	struct dirent d;	931	struct dirent d;
727	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	932	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
728	} u;	933	} *u;
729	struct dirent *entp;	934	struct dirent *entp;
730	char *name, *names;	935	char *name, *names;
731	int memlen = 4096;	936	int memlen = 4096;
732	int memofs = 0;	937	int memofs = 0;
733	int res = 0;	938	int res = 0;
734	int errorno;	939	int errorno;
735		940
736	if (!dirp)	941	LOCK (wrklock);
737	return -1;	942	self->dirp = dirp = opendir (req->dataptr);
738		943	self->dbuf = u = malloc (sizeof (*u));
739	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);
740		997
741	for (;;)	998	for (;;)
742	{	999	{
743	errno = 0, readdir_r (dirp, &u.d, &entp);	1000	ts.tv_sec = time (0) + IDLE_TIMEOUT;
744		1001
745	if (!entp)	1002	LOCK (reqlock);
746	break;
747
748	name = entp->d_name;
749
750	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
751	{
752	int len = strlen (name) + 1;
753
754	res++;
755
756	while (memofs + len > memlen)
757	{
758	memlen *= 2;
759	names = realloc (names, memlen);
760	if (!names)
761	break;
762	}
763
764	memcpy (names + memofs, name, len);
765	memofs += len;
766	}
767	}
768
769	errorno = errno;
770	closedir (dirp);
771
772	if (errorno)
773	{
774	free (names);
775	errno = errorno;
776	res = -1;
777	}
778
779	*namesp = (void *)names;
780	return res;
781	}
782
783	/*****************************************************************************/
784
785	static void *aio_proc (void *thr_arg)
786	{
787	aio_req req;
788	int type;
789
790	do
791	{
792	pthread_mutex_lock (&reqlock);
793		1003
794	for (;;)	1004	for (;;)
795	{	1005	{
796	req = reqs;	1006	self->req = req = reqq_shift (&req_queue);
797
798	if (reqs)
799	{
800	reqs = reqs->next;
801	if (!reqs) reqe = 0;
802	}
803		1007
804	if (req)	1008	if (req)
805	break;	1009	break;
806		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 */
807	pthread_cond_wait (&reqwait, &reqlock);	1027	pthread_cond_wait (&reqwait, &reqlock);
		1028	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1029	}
		1030
		1031	--idle;
808	}	1032	}
809		1033
810	pthread_mutex_unlock (&reqlock);	1034	--nready;
		1035
		1036	UNLOCK (reqlock);
811		1037
812	errno = 0; /* strictly unnecessary */	1038	errno = 0; /* strictly unnecessary */
813	type = req->type; /* remember type for QUIT check */
814		1039
815	if (!(req->flags & FLAG_CANCELLED))	1040	if (!(req->flags & FLAG_CANCELLED))
816	switch (type)	1041	switch (req->type)
817	{	1042	{
818	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;
819	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;
820		1045
821	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;
822	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;
823		1048
824	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1049	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
825	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1050	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
826	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1051	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
827		1052
…		…
830	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1055	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
831	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1056	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
832	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1057	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
833	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1058	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
834	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;
835		1061
836	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1062	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
837	case REQ_FSYNC: req->result = fsync (req->fd); break;	1063	case REQ_FSYNC: req->result = fsync (req->fd); break;
838	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1064	case REQ_READDIR: scandir_ (req, self); break;
839		1065
840	case REQ_SLEEP:	1066	case REQ_BUSY:
841	{	1067	{
842	struct timeval tv;	1068	struct timeval tv;
843		1069
844	tv.tv_sec = req->fd;	1070	tv.tv_sec = req->fd;
845	tv.tv_usec = req->fd2;	1071	tv.tv_usec = req->fd2;
…		…
847	req->result = select (0, 0, 0, 0, &tv);	1073	req->result = select (0, 0, 0, 0, &tv);
848	}	1074	}
849		1075
850	case REQ_GROUP:	1076	case REQ_GROUP:
851	case REQ_NOP:	1077	case REQ_NOP:
		1078	break;
		1079
852	case REQ_QUIT:	1080	case REQ_QUIT:
853	break;	1081	goto quit;
854		1082
855	default:	1083	default:
856	req->result = ENOSYS;	1084	req->result = ENOSYS;
857	break;	1085	break;
858	}	1086	}
859		1087
860	req->errorno = errno;	1088	req->errorno = errno;
861		1089
862	pthread_mutex_lock (&reslock);	1090	LOCK (reslock);
863		1091
864	req->next = 0;	1092	++npending;
865		1093
866	if (rese)	1094	if (!reqq_push (&res_queue, req))
867	{
868	rese->next = req;
869	rese = req;
870	}
871	else
872	{
873	rese = ress = req;
874
875	/* write a dummy byte to the pipe so fh becomes ready */	1095	/* write a dummy byte to the pipe so fh becomes ready */
876	write (respipe [1], &respipe, 1);	1096	write (respipe [1], &respipe, 1);
877	}
878		1097
879	pthread_mutex_unlock (&reslock);	1098	self->req = 0;
		1099	worker_clear (self);
		1100
		1101	UNLOCK (reslock);
880	}	1102	}
881	while (type != REQ_QUIT);	1103
		1104	quit:
		1105	LOCK (wrklock);
		1106	worker_free (self);
		1107	UNLOCK (wrklock);
882		1108
883	return 0;	1109	return 0;
884	}	1110	}
885		1111
886	/*****************************************************************************/	1112	/*****************************************************************************/
887		1113
888	static void atfork_prepare (void)	1114	static void atfork_prepare (void)
889	{	1115	{
890	pthread_mutex_lock (&reqlock);	1116	LOCK (wrklock);
891	pthread_mutex_lock (&reslock);	1117	LOCK (reqlock);
		1118	LOCK (reslock);
892	#if !HAVE_PREADWRITE	1119	#if !HAVE_PREADWRITE
893	pthread_mutex_lock (&preadwritelock);	1120	LOCK (preadwritelock);
894	#endif	1121	#endif
895	#if !HAVE_READDIR_R	1122	#if !HAVE_READDIR_R
896	pthread_mutex_lock (&readdirlock);	1123	LOCK (readdirlock);
897	#endif	1124	#endif
898	}	1125	}
899		1126
900	static void atfork_parent (void)	1127	static void atfork_parent (void)
901	{	1128	{
902	#if !HAVE_READDIR_R	1129	#if !HAVE_READDIR_R
903	pthread_mutex_unlock (&readdirlock);	1130	UNLOCK (readdirlock);
904	#endif	1131	#endif
905	#if !HAVE_PREADWRITE	1132	#if !HAVE_PREADWRITE
906	pthread_mutex_unlock (&preadwritelock);	1133	UNLOCK (preadwritelock);
907	#endif	1134	#endif
908	pthread_mutex_unlock (&reslock);	1135	UNLOCK (reslock);
909	pthread_mutex_unlock (&reqlock);	1136	UNLOCK (reqlock);
		1137	UNLOCK (wrklock);
910	}	1138	}
911		1139
912	static void atfork_child (void)	1140	static void atfork_child (void)
913	{	1141	{
914	aio_req prv;	1142	aio_req prv;
915		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
916	started = 0;	1161	started = 0;
917		1162	idle = 0;
918	while (reqs)	1163	nreqs = 0;
919	{	1164	nready = 0;
920	prv = reqs;	1165	npending = 0;
921	reqs = prv->next;
922	req_free (prv);
923	}
924
925	reqs = reqe = 0;
926
927	while (ress)
928	{
929	prv = ress;
930	ress = prv->next;
931	req_free (prv);
932	}
933
934	ress = rese = 0;
935		1166
936	close (respipe [0]);	1167	close (respipe [0]);
937	close (respipe [1]);	1168	close (respipe [1]);
938	create_pipe ();	1169	create_pipe ();
939		1170
…		…
966	PROTOTYPES: ENABLE	1197	PROTOTYPES: ENABLE
967		1198
968	BOOT:	1199	BOOT:
969	{	1200	{
970	HV *stash = gv_stashpv ("IO::AIO", 1);	1201	HV *stash = gv_stashpv ("IO::AIO", 1);
		1202
971	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1203	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
972	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1204	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
973	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));
974		1209
975	create_pipe ();	1210	create_pipe ();
976	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1211	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
977	}	1212	}
978		1213
979	void	1214	void
980	min_parallel (nthreads)	1215	min_parallel (int nthreads)
981	int nthreads
982	PROTOTYPE: $	1216	PROTOTYPE: $
983		1217
984	void	1218	void
985	max_parallel (nthreads)	1219	max_parallel (int nthreads)
986	int nthreads
987	PROTOTYPE: $	1220	PROTOTYPE: $
988		1221
989	int	1222	int
990	max_outstanding (nreqs)	1223	max_outstanding (int maxreqs)
991	int nreqs	1224	PROTOTYPE: $
992	PROTOTYPE: $
993	CODE:	1225	CODE:
994	RETVAL = max_outstanding;	1226	RETVAL = max_outstanding;
995	max_outstanding = nreqs;	1227	max_outstanding = maxreqs;
		1228	OUTPUT:
		1229	RETVAL
996		1230
997	void	1231	void
998	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1232	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
999	SV * pathname	1233	SV * pathname
1000	int flags	1234	int flags
…		…
1215		1449
1216	REQ_SEND;	1450	REQ_SEND;
1217	}	1451	}
1218		1452
1219	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
1220	aio_sleep (delay,callback=&PL_sv_undef)	1473	aio_busy (delay,callback=&PL_sv_undef)
1221	double delay	1474	double delay
1222	SV * callback	1475	SV * callback
1223	PPCODE:	1476	PPCODE:
1224	{	1477	{
1225	dREQ;	1478	dREQ;
1226		1479
1227	req->type = REQ_SLEEP;	1480	req->type = REQ_BUSY;
1228	req->fd = delay < 0. ? 0 : delay;	1481	req->fd = delay < 0. ? 0 : delay;
1229	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1482	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1230		1483
1231	REQ_SEND;	1484	REQ_SEND;
1232	}	1485	}
…		…
1255	req->type = REQ_NOP;	1508	req->type = REQ_NOP;
1256		1509
1257	REQ_SEND;	1510	REQ_SEND;
1258	}	1511	}
1259		1512
1260	#if 0	1513	int
1261		1514	aioreq_pri (int pri = 0)
1262	void	1515	PROTOTYPE: ;$
1263	aio_pri (int pri = DEFAULT_PRI)
1264	CODE:	1516	CODE:
		1517	RETVAL = next_pri - PRI_BIAS;
		1518	if (items > 0)
		1519	{
1265	if (pri < PRI_MIN) pri = PRI_MIN;	1520	if (pri < PRI_MIN) pri = PRI_MIN;
1266	if (pri > PRI_MAX) pri = PRI_MAX;	1521	if (pri > PRI_MAX) pri = PRI_MAX;
1267	next_pri = pri + PRI_BIAS;	1522	next_pri = pri + PRI_BIAS;
		1523	}
		1524	OUTPUT:
		1525	RETVAL
1268		1526
1269	#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;
1270		1534
1271	void	1535	void
1272	flush ()	1536	flush ()
1273	PROTOTYPE:	1537	PROTOTYPE:
1274	CODE:	1538	CODE:
1275	while (nreqs)	1539	while (nreqs)
1276	{	1540	{
1277	poll_wait ();	1541	poll_wait ();
1278	poll_cb ();	1542	poll_cb (0);
1279	}	1543	}
1280		1544
1281	void	1545	void
1282	poll()	1546	poll()
1283	PROTOTYPE:	1547	PROTOTYPE:
1284	CODE:	1548	CODE:
1285	if (nreqs)	1549	if (nreqs)
1286	{	1550	{
1287	poll_wait ();	1551	poll_wait ();
1288	poll_cb ();	1552	poll_cb (0);
1289	}	1553	}
1290		1554
1291	int	1555	int
1292	poll_fileno()	1556	poll_fileno()
1293	PROTOTYPE:	1557	PROTOTYPE:
…		…
1298		1562
1299	int	1563	int
1300	poll_cb(...)	1564	poll_cb(...)
1301	PROTOTYPE:	1565	PROTOTYPE:
1302	CODE:	1566	CODE:
1303	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);
1304	OUTPUT:	1576	OUTPUT:
1305	RETVAL	1577	RETVAL
1306		1578
1307	void	1579	void
1308	poll_wait()	1580	poll_wait()
…		…
1317	CODE:	1589	CODE:
1318	RETVAL = nreqs;	1590	RETVAL = nreqs;
1319	OUTPUT:	1591	OUTPUT:
1320	RETVAL	1592	RETVAL
1321		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
1322	PROTOTYPES: DISABLE	1610	PROTOTYPES: DISABLE
1323		1611
1324	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1612	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1325		1613
1326	void	1614	void
1327	cancel (aio_req_ornot req)	1615	cancel (aio_req_ornot req)
1328	PROTOTYPE:
1329	CODE:	1616	CODE:
1330	req_cancel (req);	1617	req_cancel (req);
1331		1618
1332	void	1619	void
1333	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1620	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
…		…
1369	}	1656	}
1370	}	1657	}
1371	}	1658	}
1372		1659
1373	void	1660	void
		1661	cancel_subs (aio_req_ornot req)
		1662	CODE:
		1663	req_cancel_subs (req);
		1664
		1665	void
1374	result (aio_req grp, ...)	1666	result (aio_req grp, ...)
1375	CODE:	1667	CODE:
1376	{	1668	{
1377	int i;	1669	int i;
		1670	AV *av;
		1671
		1672	grp->errorno = errno;
		1673
1378	AV *av = newAV ();	1674	av = newAV ();
1379		1675
1380	for (i = 1; i < items; ++i )	1676	for (i = 1; i < items; ++i )
1381	av_push (av, newSVsv (ST (i)));	1677	av_push (av, newSVsv (ST (i)));
1382		1678
1383	SvREFCNT_dec (grp->data);	1679	SvREFCNT_dec (grp->data);
1384	grp->data = (SV *)av;	1680	grp->data = (SV *)av;
1385	}	1681	}
1386		1682
1387	void	1683	void
		1684	errno (aio_req grp, int errorno = errno)
		1685	CODE:
		1686	grp->errorno = errorno;
		1687
		1688	void
1388	feed_limit (aio_req grp, int limit)	1689	limit (aio_req grp, int limit)
1389	CODE:	1690	CODE:
1390	grp->fd2 = limit;	1691	grp->fd2 = limit;
1391	aio_grp_feed (grp);	1692	aio_grp_feed (grp);
1392		1693
1393	void	1694	void

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