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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 1.83 by root, Sat Oct 28 00:17:30 2006 UTC

1	#if __linux	1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
2	# define _GNU_SOURCE	5	# define _GNU_SOURCE
3	#endif	6	#endif
4		7
		8	/* just in case */
5	#define _REENTRANT 1	9	#define _REENTRANT 1
6		10
7	#include <errno.h>	11	#include <errno.h>
8		12
9	#include "EXTERN.h"	13	#include "EXTERN.h"
…		…
44	/* used for struct dirent, AIX doesn't provide it */	48	/* used for struct dirent, AIX doesn't provide it */
45	#ifndef NAME_MAX	49	#ifndef NAME_MAX
46	# define NAME_MAX 4096	50	# define NAME_MAX 4096
47	#endif	51	#endif
48		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
		57
49	#if __ia64	58	#if __ia64
50	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
51	#else	62	#else
52	# define STACKSIZE 8192	63	# define STACKSIZE 16384
		64	#endif
		65
		66	/* wether word reads are potentially non-atomic.
		67	* this is conservatice, likely most arches this runs
		68	* on have atomic word read/writes.
		69	*/
		70	#ifndef WORDREAD_UNSAFE
		71	# if __i386 || __x86_64
		72	# define WORDREAD_UNSAFE 0
		73	# else
		74	# define WORDREAD_UNSAFE 1
53	#endif	75	# endif
		76	#endif
		77
		78	/* buffer size for various temporary buffers */
		79	#define AIO_BUFSIZE 65536
		80
		81	#define dBUF \
		82	char *aio_buf; \
		83	LOCK (wrklock); \
		84	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		85	UNLOCK (wrklock); \
		86	if (!aio_buf) \
		87	return -1;
54		88
55	enum {	89	enum {
56	REQ_QUIT,	90	REQ_QUIT,
57	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
58	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
59	REQ_SENDFILE,	93	REQ_SENDFILE,
60	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
61	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
62	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
63	REQ_READDIR,	97	REQ_MKNOD, REQ_READDIR,
64	REQ_LINK, REQ_SYMLINK,	98	REQ_LINK, REQ_SYMLINK,
65	REQ_GROUP, REQ_NOP,	99	REQ_GROUP, REQ_NOP,
66	REQ_SLEEP,	100	REQ_BUSY,
67	};	101	};
68		102
69	#define AIO_REQ_KLASS "IO::AIO::REQ"	103	#define AIO_REQ_KLASS "IO::AIO::REQ"
70	#define AIO_GRP_KLASS "IO::AIO::GRP"	104	#define AIO_GRP_KLASS "IO::AIO::GRP"
71		105
…		…
105	PRI_MIN = -4,	139	PRI_MIN = -4,
106	PRI_MAX = 4,	140	PRI_MAX = 4,
107		141
108	DEFAULT_PRI = 0,	142	DEFAULT_PRI = 0,
109	PRI_BIAS = -PRI_MIN,	143	PRI_BIAS = -PRI_MIN,
		144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
110	};	145	};
111		146
112	static int next_pri = DEFAULT_PRI + PRI_BIAS;	147	static int next_pri = DEFAULT_PRI + PRI_BIAS;
113		148
114	static int started, wanted;	149	static unsigned int started, wanted;
115	static volatile int nreqs;
116	static int max_outstanding = 1<<30;
117	static int respipe [2];
118		150
119	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	151	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
120	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP	152	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
121	#else	153	#else
122	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER	154	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
123	#endif	155	#endif
124		156
		157	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		158	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		159
		160	/* worker threads management */
		161	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		162
		163	typedef struct worker {
		164	/* locked by wrklock */
		165	struct worker *prev, *next;
		166
		167	pthread_t tid;
		168
		169	/* locked by reslock, reqlock or wrklock */
		170	aio_req req; /* currently processed request */
		171	void *dbuf;
		172	DIR *dirp;
		173	} worker;
		174
		175	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		176
		177	static void worker_clear (worker *wrk)
		178	{
		179	if (wrk->dirp)
		180	{
		181	closedir (wrk->dirp);
		182	wrk->dirp = 0;
		183	}
		184
		185	if (wrk->dbuf)
		186	{
		187	free (wrk->dbuf);
		188	wrk->dbuf = 0;
		189	}
		190	}
		191
		192	static void worker_free (worker *wrk)
		193	{
		194	wrk->next->prev = wrk->prev;
		195	wrk->prev->next = wrk->next;
		196
		197	free (wrk);
		198	}
		199
		200	static volatile unsigned int nreqs, nready, npending;
		201	static volatile unsigned int max_outstanding = 0xffffffff;
		202	static int respipe [2];
		203
125	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
126	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;	205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
127	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
128		207
129	static volatile aio_req reqs, reqe; /* queue start, queue end */	208	#if WORDREAD_UNSAFE
130	static volatile aio_req ress, rese; /* queue start, queue end */
131		209
		210	static unsigned int get_nready ()
		211	{
		212	unsigned int retval;
		213
		214	LOCK (reqlock);
		215	retval = nready;
		216	UNLOCK (reqlock);
		217
		218	return retval;
		219	}
		220
		221	static unsigned int get_npending ()
		222	{
		223	unsigned int retval;
		224
		225	LOCK (reslock);
		226	retval = npending;
		227	UNLOCK (reslock);
		228
		229	return retval;
		230	}
		231
		232	#else
		233
		234	# define get_nready() nready
		235	# define get_npending() npending
		236
		237	#endif
		238
		239	/*
		240	* a somewhat faster data structure might be nice, but
		241	* with 8 priorities this actually needs <20 insns
		242	* per shift, the most expensive operation.
		243	*/
		244	typedef struct {
		245	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		246	int size;
		247	} reqq;
		248
		249	static reqq req_queue;
		250	static reqq res_queue;
		251
		252	int reqq_push (reqq *q, aio_req req)
		253	{
		254	int pri = req->pri;
		255	req->next = 0;
		256
		257	if (q->qe[pri])
		258	{
		259	q->qe[pri]->next = req;
		260	q->qe[pri] = req;
		261	}
		262	else
		263	q->qe[pri] = q->qs[pri] = req;
		264
		265	return q->size++;
		266	}
		267
		268	aio_req reqq_shift (reqq *q)
		269	{
		270	int pri;
		271
		272	if (!q->size)
		273	return 0;
		274
		275	--q->size;
		276
		277	for (pri = NUM_PRI; pri--; )
		278	{
		279	aio_req req = q->qs[pri];
		280
		281	if (req)
		282	{
		283	if (!(q->qs[pri] = req->next))
		284	q->qe[pri] = 0;
		285
		286	return req;
		287	}
		288	}
		289
		290	abort ();
		291	}
		292
		293	static int poll_cb (int max);
132	static void req_invoke (aio_req req);	294	static void req_invoke (aio_req req);
133	static void req_free (aio_req req);	295	static void req_free (aio_req req);
		296	static void req_cancel (aio_req req);
134		297
135	/* must be called at most once */	298	/* must be called at most once */
136	static SV *req_sv (aio_req req, const char *klass)	299	static SV *req_sv (aio_req req, const char *klass)
137	{	300	{
138	if (!req->self)	301	if (!req->self)
…		…
169	ENTER;	332	ENTER;
170	SAVETMPS;	333	SAVETMPS;
171	PUSHMARK (SP);	334	PUSHMARK (SP);
172	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	335	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
173	PUTBACK;	336	PUTBACK;
174	call_sv (grp->fh2, G_VOID | G_EVAL);	337	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
175	SPAGAIN;	338	SPAGAIN;
176	FREETMPS;	339	FREETMPS;
177	LEAVE;	340	LEAVE;
178	}	341	}
179		342
…		…
200	req_invoke (grp);	363	req_invoke (grp);
201	req_free (grp);	364	req_free (grp);
202	}	365	}
203	}	366	}
204		367
205	static void poll_wait ()
206	{
207	fd_set rfd;
208
209	while (nreqs)
210	{
211	aio_req req;
212	#if !(__x86 || __x86_64) /* safe without sempahore on this archs */
213	pthread_mutex_lock (&reslock);
214	#endif
215	req = ress;
216	#if !(__x86 || __x86_64) /* safe without sempahore on this archs */
217	pthread_mutex_unlock (&reslock);
218	#endif
219
220	if (req)
221	return;
222
223	FD_ZERO(&rfd);
224	FD_SET(respipe [0], &rfd);
225
226	select (respipe [0] + 1, &rfd, 0, 0, 0);
227	}
228	}
229
230	static void req_invoke (aio_req req)	368	static void req_invoke (aio_req req)
231	{	369	{
232	dSP;	370	dSP;
233	int errorno = errno;
234		371
235	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))	372	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
236	return;	373	{
237
238	errno = req->errorno;
239
240	ENTER;	374	ENTER;
241	SAVETMPS;	375	SAVETMPS;
242	PUSHMARK (SP);	376	PUSHMARK (SP);
243	EXTEND (SP, 1);	377	EXTEND (SP, 1);
244		378
245	switch (req->type)	379	switch (req->type)
246	{
247	case REQ_READDIR:
248	{	380	{
249	SV *rv = &PL_sv_undef;	381	case REQ_READDIR:
250
251	if (req->result >= 0)
252	{	382	{
253	char *buf = req->data2ptr;	383	SV *rv = &PL_sv_undef;
254	AV *av = newAV ();
255		384
256	while (req->result)	385	if (req->result >= 0)
257	{	386	{
		387	int i;
		388	char *buf = req->data2ptr;
		389	AV *av = newAV ();
		390
		391	av_extend (av, req->result - 1);
		392
		393	for (i = 0; i < req->result; ++i)
		394	{
258	SV *sv = newSVpv (buf, 0);	395	SV *sv = newSVpv (buf, 0);
259		396
260	av_push (av, sv);	397	av_store (av, i, sv);
261	buf += SvCUR (sv) + 1;	398	buf += SvCUR (sv) + 1;
262	req->result--;	399	}
		400
		401	rv = sv_2mortal (newRV_noinc ((SV *)av));
263	}	402	}
264		403
265	rv = sv_2mortal (newRV_noinc ((SV *)av));	404	PUSHs (rv);
266	}	405	}
		406	break;
267		407
268	PUSHs (rv);	408	case REQ_OPEN:
		409	{
		410	/* convert fd to fh */
		411	SV *fh;
		412
		413	PUSHs (sv_2mortal (newSViv (req->result)));
		414	PUTBACK;
		415	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		416	SPAGAIN;
		417
		418	fh = SvREFCNT_inc (POPs);
		419
		420	PUSHMARK (SP);
		421	XPUSHs (sv_2mortal (fh));
		422	}
		423	break;
		424
		425	case REQ_GROUP:
		426	req->fd = 2; /* mark group as finished */
		427
		428	if (req->data)
		429	{
		430	int i;
		431	AV *av = (AV *)req->data;
		432
		433	EXTEND (SP, AvFILL (av) + 1);
		434	for (i = 0; i <= AvFILL (av); ++i)
		435	PUSHs (*av_fetch (av, i, 0));
		436	}
		437	break;
		438
		439	case REQ_NOP:
		440	case REQ_BUSY:
		441	break;
		442
		443	default:
		444	PUSHs (sv_2mortal (newSViv (req->result)));
		445	break;
269	}	446	}
270	break;
271		447
272	case REQ_OPEN:	448	errno = req->errorno;
273	{
274	/* convert fd to fh */
275	SV *fh;
276		449
277	PUSHs (sv_2mortal (newSViv (req->result)));
278	PUTBACK;	450	PUTBACK;
279	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
280	SPAGAIN;
281
282	fh = SvREFCNT_inc (POPs);
283
284	PUSHMARK (SP);
285	XPUSHs (sv_2mortal (fh));
286	}
287	break;
288
289	case REQ_GROUP:
290	req->fd = 2; /* mark group as finished */
291
292	if (req->data)
293	{
294	int i;
295	AV *av = (AV *)req->data;
296
297	EXTEND (SP, AvFILL (av) + 1);
298	for (i = 0; i <= AvFILL (av); ++i)
299	PUSHs (*av_fetch (av, i, 0));
300	}
301	break;
302
303	case REQ_NOP:
304	case REQ_SLEEP:
305	break;
306
307	default:
308	PUSHs (sv_2mortal (newSViv (req->result)));
309	break;
310	}
311
312
313	PUTBACK;
314	call_sv (req->callback, G_VOID | G_EVAL);	451	call_sv (req->callback, G_VOID | G_EVAL);
315	SPAGAIN;	452	SPAGAIN;
316		453
317	FREETMPS;	454	FREETMPS;
318	LEAVE;	455	LEAVE;
319
320	errno = errorno;
321
322	if (SvTRUE (ERRSV))
323	{	456	}
324	req_free (req);
325	croak (0);
326	}
327	}
328		457
329	static void req_free (aio_req req)
330	{
331	if (req->grp)	458	if (req->grp)
332	{	459	{
333	aio_req grp = req->grp;	460	aio_req grp = req->grp;
334		461
335	/* unlink request */	462	/* unlink request */
…		…
340	grp->grp_first = req->grp_next;	467	grp->grp_first = req->grp_next;
341		468
342	aio_grp_dec (grp);	469	aio_grp_dec (grp);
343	}	470	}
344		471
		472	if (SvTRUE (ERRSV))
		473	{
		474	req_free (req);
		475	croak (0);
		476	}
		477	}
		478
		479	static void req_free (aio_req req)
		480	{
345	if (req->self)	481	if (req->self)
346	{	482	{
347	sv_unmagic (req->self, PERL_MAGIC_ext);	483	sv_unmagic (req->self, PERL_MAGIC_ext);
348	SvREFCNT_dec (req->self);	484	SvREFCNT_dec (req->self);
349	}	485	}
…		…
352	SvREFCNT_dec (req->fh);	488	SvREFCNT_dec (req->fh);
353	SvREFCNT_dec (req->fh2);	489	SvREFCNT_dec (req->fh2);
354	SvREFCNT_dec (req->callback);	490	SvREFCNT_dec (req->callback);
355	Safefree (req->statdata);	491	Safefree (req->statdata);
356		492
357	if (req->type == REQ_READDIR && req->result >= 0)	493	if (req->type == REQ_READDIR)
358	free (req->data2ptr);	494	free (req->data2ptr);
359		495
360	Safefree (req);	496	Safefree (req);
361	}	497	}
362		498
		499	static void req_cancel_subs (aio_req grp)
		500	{
		501	aio_req sub;
		502
		503	if (grp->type != REQ_GROUP)
		504	return;
		505
		506	SvREFCNT_dec (grp->fh2);
		507	grp->fh2 = 0;
		508
		509	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		510	req_cancel (sub);
		511	}
		512
363	static void req_cancel (aio_req req)	513	static void req_cancel (aio_req req)
364	{	514	{
365	req->flags |= FLAG_CANCELLED;	515	req->flags |= FLAG_CANCELLED;
366		516
367	if (req->type == REQ_GROUP)	517	req_cancel_subs (req);
368	{	518	}
369	aio_req sub;
370		519
371	for (sub = req->grp_first; sub; sub = sub->grp_next)	520	static void *aio_proc(void *arg);
372	req_cancel (sub);	521
		522	static void start_thread (void)
		523	{
		524	sigset_t fullsigset, oldsigset;
		525	pthread_attr_t attr;
		526
		527	worker *wrk = calloc (1, sizeof (worker));
		528
		529	if (!wrk)
		530	croak ("unable to allocate worker thread data");
		531
		532	pthread_attr_init (&attr);
		533	pthread_attr_setstacksize (&attr, STACKSIZE);
		534	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		535	#ifdef PTHREAD_SCOPE_PROCESS
		536	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		537	#endif
		538
		539	sigfillset (&fullsigset);
		540
		541	LOCK (wrklock);
		542	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
		543
		544	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
373	}	545	{
374	}	546	wrk->prev = &wrk_first;
		547	wrk->next = wrk_first.next;
		548	wrk_first.next->prev = wrk;
		549	wrk_first.next = wrk;
		550	++started;
		551	}
		552	else
		553	free (wrk);
375		554
		555	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		556	UNLOCK (wrklock);
		557	}
		558
		559	static void maybe_start_thread ()
		560	{
		561	#if 0
		562	static struct timeval last;
		563	struct timeval diff, now;
		564	#endif
		565
		566	if (started >= wanted)
		567	return;
		568
		569	if (nready <= nreqs - get_nready () - get_npending ())
		570	return;
		571
		572	#if 0
		573	gettimeofday (&now, 0);
		574
		575	diff.tv_sec = now.tv_sec - last.tv_sec;
		576	diff.tv_usec = now.tv_usec - last.tv_usec;
		577
		578	if (diff.tv_usec < 0)
		579	{
		580	--diff.tv_sec;
		581	diff.tv_usec += 1000000;
		582	}
		583
		584	if (!diff.tv_sec && diff.tv_usec < 10000)
		585	return;
		586
		587	last = now;
		588	#endif
		589
		590	start_thread ();
		591	}
		592
		593	static void req_send (aio_req req)
		594	{
		595	++nreqs;
		596
		597	LOCK (reqlock);
		598	++nready;
		599	reqq_push (&req_queue, req);
		600	pthread_cond_signal (&reqwait);
		601	UNLOCK (reqlock);
		602
		603	maybe_start_thread ();
		604	}
		605
		606	static void end_thread (void)
		607	{
		608	aio_req req;
		609
		610	Newz (0, req, 1, aio_cb);
		611
		612	req->type = REQ_QUIT;
		613	req->pri = PRI_MAX + PRI_BIAS;
		614
		615	LOCK (reqlock);
		616	reqq_push (&req_queue, req);
		617	pthread_cond_signal (&reqwait);
		618	UNLOCK (reqlock);
		619
		620	LOCK (wrklock);
		621	--started;
		622	UNLOCK (wrklock);
		623	}
		624
		625	static void min_parallel (int nthreads)
		626	{
		627	if (wanted < nthreads)
		628	wanted = nthreads;
		629	}
		630
		631	static void max_parallel (int nthreads)
		632	{
		633	if (wanted > nthreads)
		634	wanted = nthreads;
		635
		636	while (started > wanted)
		637	end_thread ();
		638	}
		639
		640	static void poll_wait ()
		641	{
		642	fd_set rfd;
		643
		644	while (nreqs)
		645	{
		646	int size;
		647	if (WORDREAD_UNSAFE) LOCK (reslock);
		648	size = res_queue.size;
		649	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		650
		651	if (size)
		652	return;
		653
		654	maybe_start_thread ();
		655
		656	FD_ZERO(&rfd);
		657	FD_SET(respipe [0], &rfd);
		658
		659	select (respipe [0] + 1, &rfd, 0, 0, 0);
		660	}
		661	}
		662
376	static int poll_cb ()	663	static int poll_cb (int max)
377	{	664	{
378	dSP;	665	dSP;
379	int count = 0;	666	int count = 0;
380	int do_croak = 0;	667	int do_croak = 0;
381	aio_req req;	668	aio_req req;
382		669
383	for (;;)	670	for (;;)
384	{	671	{
385	pthread_mutex_lock (&reslock);	672	while (max <= 0 || count < max)
386	req = ress;
387
388	if (req)
389	{	673	{
390	ress = req->next;	674	maybe_start_thread ();
391		675
		676	LOCK (reslock);
		677	req = reqq_shift (&res_queue);
		678
392	if (!ress)	679	if (req)
393	{	680	{
		681	--npending;
		682
		683	if (!res_queue.size)
		684	{
394	/* read any signals sent by the worker threads */	685	/* read any signals sent by the worker threads */
395	char buf [32];	686	char buf [32];
396	while (read (respipe [0], buf, 32) == 32)	687	while (read (respipe [0], buf, 32) == 32)
		688	;
397	;	689	}
398
399	rese = 0;
400	}	690	}
		691
		692	UNLOCK (reslock);
		693
		694	if (!req)
		695	break;
		696
		697	--nreqs;
		698
		699	if (req->type == REQ_GROUP && req->length)
		700	{
		701	req->fd = 1; /* mark request as delayed */
		702	continue;
		703	}
		704	else
		705	{
		706	if (req->type == REQ_READ)
		707	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		708
		709	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		710	SvREADONLY_off (req->data);
		711
		712	if (req->statdata)
		713	{
		714	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		715	PL_laststatval = req->result;
		716	PL_statcache = *(req->statdata);
		717	}
		718
		719	req_invoke (req);
		720
		721	count++;
		722	}
		723
		724	req_free (req);
401	}	725	}
402		726
403	pthread_mutex_unlock (&reslock);	727	if (nreqs <= max_outstanding)
404
405	if (!req)
406	break;	728	break;
407		729
408	--nreqs;	730	poll_wait ();
409		731
410	if (req->type == REQ_QUIT)	732	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	}	733	}
439		734
440	return count;	735	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	}	736	}
532		737
533	static void create_pipe ()	738	static void create_pipe ()
534	{	739	{
535	if (pipe (respipe))	740	if (pipe (respipe))
…		…
559	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	764	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
560	{	765	{
561	ssize_t res;	766	ssize_t res;
562	off_t ooffset;	767	off_t ooffset;
563		768
564	pthread_mutex_lock (&preadwritelock);	769	LOCK (preadwritelock);
565	ooffset = lseek (fd, 0, SEEK_CUR);	770	ooffset = lseek (fd, 0, SEEK_CUR);
566	lseek (fd, offset, SEEK_SET);	771	lseek (fd, offset, SEEK_SET);
567	res = read (fd, buf, count);	772	res = read (fd, buf, count);
568	lseek (fd, ooffset, SEEK_SET);	773	lseek (fd, ooffset, SEEK_SET);
569	pthread_mutex_unlock (&preadwritelock);	774	UNLOCK (preadwritelock);
570		775
571	return res;	776	return res;
572	}	777	}
573		778
574	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	779	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
575	{	780	{
576	ssize_t res;	781	ssize_t res;
577	off_t ooffset;	782	off_t ooffset;
578		783
579	pthread_mutex_lock (&preadwritelock);	784	LOCK (preadwritelock);
580	ooffset = lseek (fd, 0, SEEK_CUR);	785	ooffset = lseek (fd, 0, SEEK_CUR);
581	lseek (fd, offset, SEEK_SET);	786	lseek (fd, offset, SEEK_SET);
582	res = write (fd, buf, count);	787	res = write (fd, buf, count);
583	lseek (fd, offset, SEEK_SET);	788	lseek (fd, offset, SEEK_SET);
584	pthread_mutex_unlock (&preadwritelock);	789	UNLOCK (preadwritelock);
585		790
586	return res;	791	return res;
587	}	792	}
588	#endif	793	#endif
589		794
590	#if !HAVE_FDATASYNC	795	#if !HAVE_FDATASYNC
591	# define fdatasync fsync	796	# define fdatasync fsync
592	#endif	797	#endif
593		798
594	#if !HAVE_READAHEAD	799	#if !HAVE_READAHEAD
595	# define readahead aio_readahead	800	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
596		801
597	static ssize_t readahead (int fd, off_t offset, size_t count)	802	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
598	{	803	{
599	char readahead_buf[4096];	804	dBUF;
600		805
601	while (count > 0)	806	while (count > 0)
602	{	807	{
603	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	808	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
604		809
605	pread (fd, readahead_buf, len, offset);	810	pread (fd, aio_buf, len, offset);
606	offset += len;	811	offset += len;
607	count -= len;	812	count -= len;
608	}	813	}
609		814
610	errno = 0;	815	errno = 0;
611	}	816	}
		817
612	#endif	818	#endif
613		819
614	#if !HAVE_READDIR_R	820	#if !HAVE_READDIR_R
615	# define readdir_r aio_readdir_r	821	# define readdir_r aio_readdir_r
616		822
…		…
619	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	825	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
620	{	826	{
621	struct dirent *e;	827	struct dirent *e;
622	int errorno;	828	int errorno;
623		829
624	pthread_mutex_lock (&readdirlock);	830	LOCK (readdirlock);
625		831
626	e = readdir (dirp);	832	e = readdir (dirp);
627	errorno = errno;	833	errorno = errno;
628		834
629	if (e)	835	if (e)
…		…
632	strcpy (ent->d_name, e->d_name);	838	strcpy (ent->d_name, e->d_name);
633	}	839	}
634	else	840	else
635	*res = 0;	841	*res = 0;
636		842
637	pthread_mutex_unlock (&readdirlock);	843	UNLOCK (readdirlock);
638		844
639	errno = errorno;	845	errno = errorno;
640	return e ? 0 : -1;	846	return e ? 0 : -1;
641	}	847	}
642	#endif	848	#endif
643		849
644	/* sendfile always needs emulation */	850	/* sendfile always needs emulation */
645	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	851	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
646	{	852	{
647	ssize_t res;	853	ssize_t res;
648		854
649	if (!count)	855	if (!count)
650	return 0;	856	return 0;
…		…
661	{	867	{
662	off_t sbytes;	868	off_t sbytes;
663	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	869	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
664		870
665	if (res < 0 && sbytes)	871	if (res < 0 && sbytes)
666	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	872	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
667	res = sbytes;	873	res = sbytes;
668	}	874	}
669		875
670	# elif __hpux	876	# elif __hpux
671	res = sendfile (ofd, ifd, offset, count, 0, 0);	877	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
699	#endif	905	#endif
700	)	906	)
701	)	907	)
702	{	908	{
703	/* emulate sendfile. this is a major pain in the ass */	909	/* emulate sendfile. this is a major pain in the ass */
704	char buf[4096];	910	dBUF;
		911
705	res = 0;	912	res = 0;
706		913
707	while (count)	914	while (count)
708	{	915	{
709	ssize_t cnt;	916	ssize_t cnt;
710		917
711	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	918	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
712		919
713	if (cnt <= 0)	920	if (cnt <= 0)
714	{	921	{
715	if (cnt && !res) res = -1;	922	if (cnt && !res) res = -1;
716	break;	923	break;
717	}	924	}
718		925
719	cnt = write (ofd, buf, cnt);	926	cnt = write (ofd, aio_buf, cnt);
720		927
721	if (cnt <= 0)	928	if (cnt <= 0)
722	{	929	{
723	if (cnt && !res) res = -1;	930	if (cnt && !res) res = -1;
724	break;	931	break;
…		…
732		939
733	return res;	940	return res;
734	}	941	}
735		942
736	/* read a full directory */	943	/* read a full directory */
737	static int scandir_ (const char *path, void **namesp)	944	static void scandir_ (aio_req req, worker *self)
738	{	945	{
739	DIR *dirp = opendir (path);	946	DIR *dirp;
740	union	947	union
741	{	948	{
742	struct dirent d;	949	struct dirent d;
743	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	950	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
744	} u;	951	} *u;
745	struct dirent *entp;	952	struct dirent *entp;
746	char *name, *names;	953	char *name, *names;
747	int memlen = 4096;	954	int memlen = 4096;
748	int memofs = 0;	955	int memofs = 0;
749	int res = 0;	956	int res = 0;
750	int errorno;	957	int errorno;
751		958
752	if (!dirp)	959	LOCK (wrklock);
753	return -1;	960	self->dirp = dirp = opendir (req->dataptr);
754		961	self->dbuf = u = malloc (sizeof (*u));
755	names = malloc (memlen);	962	req->data2ptr = names = malloc (memlen);
		963	UNLOCK (wrklock);
		964
		965	if (dirp && u && names)
		966	for (;;)
		967	{
		968	errno = 0;
		969	readdir_r (dirp, &u->d, &entp);
		970
		971	if (!entp)
		972	break;
		973
		974	name = entp->d_name;
		975
		976	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		977	{
		978	int len = strlen (name) + 1;
		979
		980	res++;
		981
		982	while (memofs + len > memlen)
		983	{
		984	memlen *= 2;
		985	LOCK (wrklock);
		986	req->data2ptr = names = realloc (names, memlen);
		987	UNLOCK (wrklock);
		988
		989	if (!names)
		990	break;
		991	}
		992
		993	memcpy (names + memofs, name, len);
		994	memofs += len;
		995	}
		996	}
		997
		998	if (errno)
		999	res = -1;
		1000
		1001	req->result = res;
		1002	}
		1003
		1004	/*****************************************************************************/
		1005
		1006	static void *aio_proc (void *thr_arg)
		1007	{
		1008	aio_req req;
		1009	worker *self = (worker *)thr_arg;
756		1010
757	for (;;)	1011	for (;;)
758	{	1012	{
759	errno = 0, readdir_r (dirp, &u.d, &entp);	1013	LOCK (reqlock);
760
761	if (!entp)
762	break;
763
764	name = entp->d_name;
765
766	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
767	{
768	int len = strlen (name) + 1;
769
770	res++;
771
772	while (memofs + len > memlen)
773	{
774	memlen *= 2;
775	names = realloc (names, memlen);
776	if (!names)
777	break;
778	}
779
780	memcpy (names + memofs, name, len);
781	memofs += len;
782	}
783	}
784
785	errorno = errno;
786	closedir (dirp);
787
788	if (errorno)
789	{
790	free (names);
791	errno = errorno;
792	res = -1;
793	}
794
795	*namesp = (void *)names;
796	return res;
797	}
798
799	/*****************************************************************************/
800
801	static void *aio_proc (void *thr_arg)
802	{
803	aio_req req;
804	int type;
805
806	do
807	{
808	pthread_mutex_lock (&reqlock);
809		1014
810	for (;;)	1015	for (;;)
811	{	1016	{
812	req = reqs;	1017	self->req = req = reqq_shift (&req_queue);
813
814	if (reqs)
815	{
816	reqs = reqs->next;
817	if (!reqs) reqe = 0;
818	}
819		1018
820	if (req)	1019	if (req)
821	break;	1020	break;
822		1021
823	pthread_cond_wait (&reqwait, &reqlock);	1022	pthread_cond_wait (&reqwait, &reqlock);
824	}	1023	}
825		1024
826	pthread_mutex_unlock (&reqlock);	1025	--nready;
		1026
		1027	UNLOCK (reqlock);
827		1028
828	errno = 0; /* strictly unnecessary */	1029	errno = 0; /* strictly unnecessary */
829	type = req->type; /* remember type for QUIT check */
830		1030
831	if (!(req->flags & FLAG_CANCELLED))	1031	if (!(req->flags & FLAG_CANCELLED))
832	switch (type)	1032	switch (req->type)
833	{	1033	{
834	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1034	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;	1035	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
836		1036
837	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1037	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;	1038	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
839		1039
840	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1040	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
841	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1041	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
842	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1042	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
843		1043
…		…
846	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1046	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
847	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1047	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
848	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1048	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
849	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1049	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
850	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1050	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1051	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
851		1052
852	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1053	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
853	case REQ_FSYNC: req->result = fsync (req->fd); break;	1054	case REQ_FSYNC: req->result = fsync (req->fd); break;
854	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1055	case REQ_READDIR: scandir_ (req, self); break;
855		1056
856	case REQ_SLEEP:	1057	case REQ_BUSY:
857	{	1058	{
858	struct timeval tv;	1059	struct timeval tv;
859		1060
860	tv.tv_sec = req->fd;	1061	tv.tv_sec = req->fd;
861	tv.tv_usec = req->fd2;	1062	tv.tv_usec = req->fd2;
…		…
863	req->result = select (0, 0, 0, 0, &tv);	1064	req->result = select (0, 0, 0, 0, &tv);
864	}	1065	}
865		1066
866	case REQ_GROUP:	1067	case REQ_GROUP:
867	case REQ_NOP:	1068	case REQ_NOP:
		1069	break;
		1070
868	case REQ_QUIT:	1071	case REQ_QUIT:
		1072	LOCK (wrklock);
		1073	worker_free (self);
		1074	--started;
		1075	UNLOCK (wrklock);
869	break;	1076	return 0;
870		1077
871	default:	1078	default:
872	req->result = ENOSYS;	1079	req->result = ENOSYS;
873	break;	1080	break;
874	}	1081	}
875		1082
876	req->errorno = errno;	1083	req->errorno = errno;
877		1084
878	pthread_mutex_lock (&reslock);	1085	LOCK (reslock);
879		1086
880	req->next = 0;	1087	++npending;
881		1088
882	if (rese)	1089	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 */	1090	/* write a dummy byte to the pipe so fh becomes ready */
892	write (respipe [1], &respipe, 1);	1091	write (respipe [1], &respipe, 1);
893	}
894		1092
895	pthread_mutex_unlock (&reslock);	1093	self->req = 0;
896	}	1094	worker_clear (self);
897	while (type != REQ_QUIT);
898		1095
899	return 0;	1096	UNLOCK (reslock);
		1097	}
900	}	1098	}
901		1099
902	/*****************************************************************************/	1100	/*****************************************************************************/
903		1101
904	static void atfork_prepare (void)	1102	static void atfork_prepare (void)
905	{	1103	{
906	pthread_mutex_lock (&reqlock);	1104	LOCK (wrklock);
907	pthread_mutex_lock (&reslock);	1105	LOCK (reqlock);
		1106	LOCK (reslock);
908	#if !HAVE_PREADWRITE	1107	#if !HAVE_PREADWRITE
909	pthread_mutex_lock (&preadwritelock);	1108	LOCK (preadwritelock);
910	#endif	1109	#endif
911	#if !HAVE_READDIR_R	1110	#if !HAVE_READDIR_R
912	pthread_mutex_lock (&readdirlock);	1111	LOCK (readdirlock);
913	#endif	1112	#endif
914	}	1113	}
915		1114
916	static void atfork_parent (void)	1115	static void atfork_parent (void)
917	{	1116	{
918	#if !HAVE_READDIR_R	1117	#if !HAVE_READDIR_R
919	pthread_mutex_unlock (&readdirlock);	1118	UNLOCK (readdirlock);
920	#endif	1119	#endif
921	#if !HAVE_PREADWRITE	1120	#if !HAVE_PREADWRITE
922	pthread_mutex_unlock (&preadwritelock);	1121	UNLOCK (preadwritelock);
923	#endif	1122	#endif
924	pthread_mutex_unlock (&reslock);	1123	UNLOCK (reslock);
925	pthread_mutex_unlock (&reqlock);	1124	UNLOCK (reqlock);
		1125	UNLOCK (wrklock);
926	}	1126	}
927		1127
928	static void atfork_child (void)	1128	static void atfork_child (void)
929	{	1129	{
930	aio_req prv;	1130	aio_req prv;
931		1131
		1132	while (prv = reqq_shift (&req_queue))
		1133	req_free (prv);
		1134
		1135	while (prv = reqq_shift (&res_queue))
		1136	req_free (prv);
		1137
		1138	while (wrk_first.next != &wrk_first)
		1139	{
		1140	worker *wrk = wrk_first.next;
		1141
		1142	if (wrk->req)
		1143	req_free (wrk->req);
		1144
		1145	worker_clear (wrk);
		1146	worker_free (wrk);
		1147	}
		1148
932	started = 0;	1149	started = 0;
933		1150	nreqs = 0;
934	while (reqs)
935	{
936	prv = reqs;
937	reqs = prv->next;
938	req_free (prv);
939	}
940
941	reqs = reqe = 0;
942
943	while (ress)
944	{
945	prv = ress;
946	ress = prv->next;
947	req_free (prv);
948	}
949
950	ress = rese = 0;
951		1151
952	close (respipe [0]);	1152	close (respipe [0]);
953	close (respipe [1]);	1153	close (respipe [1]);
954	create_pipe ();	1154	create_pipe ();
955		1155
…		…
982	PROTOTYPES: ENABLE	1182	PROTOTYPES: ENABLE
983		1183
984	BOOT:	1184	BOOT:
985	{	1185	{
986	HV *stash = gv_stashpv ("IO::AIO", 1);	1186	HV *stash = gv_stashpv ("IO::AIO", 1);
		1187
987	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1188	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
988	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1189	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
989	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1190	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1191	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1192	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1193	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
990		1194
991	create_pipe ();	1195	create_pipe ();
992	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1196	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
993	}
994		1197
		1198	start_thread ();
		1199	}
		1200
995	void	1201	void
996	min_parallel (nthreads)	1202	min_parallel (int nthreads)
997	int nthreads
998	PROTOTYPE: $	1203	PROTOTYPE: $
999		1204
1000	void	1205	void
1001	max_parallel (nthreads)	1206	max_parallel (int nthreads)
1002	int nthreads
1003	PROTOTYPE: $	1207	PROTOTYPE: $
1004		1208
1005	int	1209	int
1006	max_outstanding (nreqs)	1210	max_outstanding (int maxreqs)
1007	int nreqs	1211	PROTOTYPE: $
1008	PROTOTYPE: $
1009	CODE:	1212	CODE:
1010	RETVAL = max_outstanding;	1213	RETVAL = max_outstanding;
1011	max_outstanding = nreqs;	1214	max_outstanding = maxreqs;
		1215	OUTPUT:
		1216	RETVAL
1012		1217
1013	void	1218	void
1014	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1219	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1015	SV * pathname	1220	SV * pathname
1016	int flags	1221	int flags
…		…
1231		1436
1232	REQ_SEND;	1437	REQ_SEND;
1233	}	1438	}
1234		1439
1235	void	1440	void
		1441	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1442	SV * pathname
		1443	SV * callback
		1444	UV mode
		1445	UV dev
		1446	PPCODE:
		1447	{
		1448	dREQ;
		1449
		1450	req->type = REQ_MKNOD;
		1451	req->data = newSVsv (pathname);
		1452	req->dataptr = SvPVbyte_nolen (req->data);
		1453	req->mode = (mode_t)mode;
		1454	req->offset = dev;
		1455
		1456	REQ_SEND;
		1457	}
		1458
		1459	void
1236	aio_sleep (delay,callback=&PL_sv_undef)	1460	aio_busy (delay,callback=&PL_sv_undef)
1237	double delay	1461	double delay
1238	SV * callback	1462	SV * callback
1239	PPCODE:	1463	PPCODE:
1240	{	1464	{
1241	dREQ;	1465	dREQ;
1242		1466
1243	req->type = REQ_SLEEP;	1467	req->type = REQ_BUSY;
1244	req->fd = delay < 0. ? 0 : delay;	1468	req->fd = delay < 0. ? 0 : delay;
1245	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1469	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1246		1470
1247	REQ_SEND;	1471	REQ_SEND;
1248	}	1472	}
…		…
1271	req->type = REQ_NOP;	1495	req->type = REQ_NOP;
1272		1496
1273	REQ_SEND;	1497	REQ_SEND;
1274	}	1498	}
1275		1499
1276	#if 0	1500	int
1277		1501	aioreq_pri (int pri = 0)
1278	void	1502	PROTOTYPE: ;$
1279	aio_pri (int pri = DEFAULT_PRI)
1280	CODE:	1503	CODE:
		1504	RETVAL = next_pri - PRI_BIAS;
		1505	if (items > 0)
		1506	{
1281	if (pri < PRI_MIN) pri = PRI_MIN;	1507	if (pri < PRI_MIN) pri = PRI_MIN;
1282	if (pri > PRI_MAX) pri = PRI_MAX;	1508	if (pri > PRI_MAX) pri = PRI_MAX;
1283	next_pri = pri + PRI_BIAS;	1509	next_pri = pri + PRI_BIAS;
		1510	}
		1511	OUTPUT:
		1512	RETVAL
1284		1513
1285	#endif	1514	void
		1515	aioreq_nice (int nice = 0)
		1516	CODE:
		1517	nice = next_pri - nice;
		1518	if (nice < PRI_MIN) nice = PRI_MIN;
		1519	if (nice > PRI_MAX) nice = PRI_MAX;
		1520	next_pri = nice + PRI_BIAS;
1286		1521
1287	void	1522	void
1288	flush ()	1523	flush ()
1289	PROTOTYPE:	1524	PROTOTYPE:
1290	CODE:	1525	CODE:
1291	while (nreqs)	1526	while (nreqs)
1292	{	1527	{
1293	poll_wait ();	1528	poll_wait ();
1294	poll_cb ();	1529	poll_cb (0);
1295	}	1530	}
1296		1531
1297	void	1532	void
1298	poll()	1533	poll()
1299	PROTOTYPE:	1534	PROTOTYPE:
1300	CODE:	1535	CODE:
1301	if (nreqs)	1536	if (nreqs)
1302	{	1537	{
1303	poll_wait ();	1538	poll_wait ();
1304	poll_cb ();	1539	poll_cb (0);
1305	}	1540	}
1306		1541
1307	int	1542	int
1308	poll_fileno()	1543	poll_fileno()
1309	PROTOTYPE:	1544	PROTOTYPE:
…		…
1314		1549
1315	int	1550	int
1316	poll_cb(...)	1551	poll_cb(...)
1317	PROTOTYPE:	1552	PROTOTYPE:
1318	CODE:	1553	CODE:
1319	RETVAL = poll_cb ();	1554	RETVAL = poll_cb (0);
		1555	OUTPUT:
		1556	RETVAL
		1557
		1558	int
		1559	poll_some(int max = 0)
		1560	PROTOTYPE: $
		1561	CODE:
		1562	RETVAL = poll_cb (max);
1320	OUTPUT:	1563	OUTPUT:
1321	RETVAL	1564	RETVAL
1322		1565
1323	void	1566	void
1324	poll_wait()	1567	poll_wait()
…		…
1333	CODE:	1576	CODE:
1334	RETVAL = nreqs;	1577	RETVAL = nreqs;
1335	OUTPUT:	1578	OUTPUT:
1336	RETVAL	1579	RETVAL
1337		1580
		1581	int
		1582	nready()
		1583	PROTOTYPE:
		1584	CODE:
		1585	RETVAL = get_nready ();
		1586	OUTPUT:
		1587	RETVAL
		1588
		1589	int
		1590	npending()
		1591	PROTOTYPE:
		1592	CODE:
		1593	RETVAL = get_npending ();
		1594	OUTPUT:
		1595	RETVAL
		1596
1338	PROTOTYPES: DISABLE	1597	PROTOTYPES: DISABLE
1339		1598
1340	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1599	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1341		1600
1342	void	1601	void
1343	cancel (aio_req_ornot req)	1602	cancel (aio_req_ornot req)
1344	PROTOTYPE:
1345	CODE:	1603	CODE:
1346	req_cancel (req);	1604	req_cancel (req);
1347		1605
1348	void	1606	void
1349	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1607	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
…		…
1385	}	1643	}
1386	}	1644	}
1387	}	1645	}
1388		1646
1389	void	1647	void
		1648	cancel_subs (aio_req_ornot req)
		1649	CODE:
		1650	req_cancel_subs (req);
		1651
		1652	void
1390	result (aio_req grp, ...)	1653	result (aio_req grp, ...)
1391	CODE:	1654	CODE:
1392	{	1655	{
1393	int i;	1656	int i;
		1657	AV *av;
		1658
		1659	grp->errorno = errno;
		1660
1394	AV *av = newAV ();	1661	av = newAV ();
1395		1662
1396	for (i = 1; i < items; ++i )	1663	for (i = 1; i < items; ++i )
1397	av_push (av, newSVsv (ST (i)));	1664	av_push (av, newSVsv (ST (i)));
1398		1665
1399	SvREFCNT_dec (grp->data);	1666	SvREFCNT_dec (grp->data);
1400	grp->data = (SV *)av;	1667	grp->data = (SV *)av;
1401	}	1668	}
1402		1669
1403	void	1670	void
		1671	errno (aio_req grp, int errorno = errno)
		1672	CODE:
		1673	grp->errorno = errorno;
		1674
		1675	void
1404	feed_limit (aio_req grp, int limit)	1676	limit (aio_req grp, int limit)
1405	CODE:	1677	CODE:
1406	grp->fd2 = limit;	1678	grp->fd2 = limit;
1407	aio_grp_feed (grp);	1679	aio_grp_feed (grp);
1408		1680
1409	void	1681	void

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