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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.62 by root, Mon Oct 23 22:45:18 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	fd_set rfd;
197
198	while (nreqs)
199	{
200	aio_req req;
201	pthread_mutex_lock (&reslock);
202	req = ress;
203	pthread_mutex_unlock (&reslock);
204
205	if (req)
206	return;
207
208	FD_ZERO(&rfd);
209	FD_SET(respipe [0], &rfd);
210
211	select (respipe [0] + 1, &rfd, 0, 0, 0);
212	}
213	}
214
215	static void req_invoke (aio_req req)	372	static void req_invoke (aio_req req)
216	{	373	{
217	dSP;	374	dSP;
218	int errorno = errno;
219		375
220	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))	376	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
221	return;	377	{
222
223	errno = req->errorno;
224
225	ENTER;	378	ENTER;
226	SAVETMPS;	379	SAVETMPS;
227	PUSHMARK (SP);	380	PUSHMARK (SP);
228	EXTEND (SP, 1);	381	EXTEND (SP, 1);
229		382
230	switch (req->type)	383	switch (req->type)
231	{
232	case REQ_READDIR:
233	{	384	{
234	SV *rv = &PL_sv_undef;	385	case REQ_READDIR:
235
236	if (req->result >= 0)
237	{	386	{
238	char *buf = req->data2ptr;	387	SV *rv = &PL_sv_undef;
239	AV *av = newAV ();
240		388
241	while (req->result)	389	if (req->result >= 0)
242	{	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	{
243	SV *sv = newSVpv (buf, 0);	399	SV *sv = newSVpv (buf, 0);
244		400
245	av_push (av, sv);	401	av_store (av, i, sv);
246	buf += SvCUR (sv) + 1;	402	buf += SvCUR (sv) + 1;
247	req->result--;	403	}
		404
		405	rv = sv_2mortal (newRV_noinc ((SV *)av));
248	}	406	}
249		407
250	rv = sv_2mortal (newRV_noinc ((SV *)av));	408	PUSHs (rv);
251	}	409	}
		410	break;
252		411
253	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;
254	}	450	}
255	break;
256		451
257	case REQ_OPEN:	452	errno = req->errorno;
258	{
259	/* convert fd to fh */
260	SV *fh;
261		453
262	PUSHs (sv_2mortal (newSViv (req->result)));
263	PUTBACK;	454	PUTBACK;
264	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
265	SPAGAIN;
266
267	fh = SvREFCNT_inc (POPs);
268
269	PUSHMARK (SP);
270	XPUSHs (sv_2mortal (fh));
271	}
272	break;
273
274	case REQ_GROUP:
275	req->fd = 2; /* mark group as finished */
276
277	if (req->data)
278	{
279	int i;
280	AV *av = (AV *)req->data;
281
282	EXTEND (SP, AvFILL (av) + 1);
283	for (i = 0; i <= AvFILL (av); ++i)
284	PUSHs (*av_fetch (av, i, 0));
285	}
286	break;
287
288	case REQ_NOP:
289	case REQ_SLEEP:
290	break;
291
292	default:
293	PUSHs (sv_2mortal (newSViv (req->result)));
294	break;
295	}
296
297
298	PUTBACK;
299	call_sv (req->callback, G_VOID | G_EVAL);	455	call_sv (req->callback, G_VOID | G_EVAL);
300	SPAGAIN;	456	SPAGAIN;
301		457
302	FREETMPS;	458	FREETMPS;
303	LEAVE;	459	LEAVE;
304
305	errno = errorno;
306
307	if (SvTRUE (ERRSV))
308	{	460	}
309	req_free (req);
310	croak (0);
311	}
312	}
313		461
314	static void req_free (aio_req req)
315	{
316	if (req->grp)	462	if (req->grp)
317	{	463	{
318	aio_req grp = req->grp;	464	aio_req grp = req->grp;
319		465
320	/* unlink request */	466	/* unlink request */
…		…
325	grp->grp_first = req->grp_next;	471	grp->grp_first = req->grp_next;
326		472
327	aio_grp_dec (grp);	473	aio_grp_dec (grp);
328	}	474	}
329		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	{
330	if (req->self)	485	if (req->self)
331	{	486	{
332	sv_unmagic (req->self, PERL_MAGIC_ext);	487	sv_unmagic (req->self, PERL_MAGIC_ext);
333	SvREFCNT_dec (req->self);	488	SvREFCNT_dec (req->self);
334	}	489	}
…		…
337	SvREFCNT_dec (req->fh);	492	SvREFCNT_dec (req->fh);
338	SvREFCNT_dec (req->fh2);	493	SvREFCNT_dec (req->fh2);
339	SvREFCNT_dec (req->callback);	494	SvREFCNT_dec (req->callback);
340	Safefree (req->statdata);	495	Safefree (req->statdata);
341		496
342	if (req->type == REQ_READDIR && req->result >= 0)	497	if (req->type == REQ_READDIR)
343	free (req->data2ptr);	498	free (req->data2ptr);
344		499
345	Safefree (req);	500	Safefree (req);
346	}	501	}
347		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
348	static void req_cancel (aio_req req)	517	static void req_cancel (aio_req req)
349	{	518	{
350	req->flags |= FLAG_CANCELLED;	519	req->flags |= FLAG_CANCELLED;
351		520
352	if (req->type == REQ_GROUP)	521	req_cancel_subs (req);
353	{	522	}
354	aio_req sub;
355		523
356	for (sub = req->grp_first; sub; sub = sub->grp_next)	524	static void *aio_proc(void *arg);
357	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)
358	}	549	{
359	}	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);
360		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
361	static int poll_cb ()	645	static int poll_cb (int max)
362	{	646	{
363	dSP;	647	dSP;
364	int count = 0;	648	int count = 0;
365	int do_croak = 0;	649	int do_croak = 0;
366	aio_req req;	650	aio_req req;
367		651
368	for (;;)	652	for (;;)
369	{	653	{
370	pthread_mutex_lock (&reslock);	654	while (max <= 0 || count < max)
371	req = ress;
372
373	if (req)
374	{	655	{
375	ress = req->next;	656	maybe_start_thread ();
376		657
		658	LOCK (reslock);
		659	req = reqq_shift (&res_queue);
		660
377	if (!ress)	661	if (req)
378	{	662	{
		663	--npending;
		664
		665	if (!res_queue.size)
		666	{
379	/* read any signals sent by the worker threads */	667	/* read any signals sent by the worker threads */
380	char buf [32];	668	char buf [32];
381	while (read (respipe [0], buf, 32) == 32)	669	while (read (respipe [0], buf, 32) == 32)
		670	;
382	;	671	}
383
384	rese = 0;
385	}	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);
386	}	707	}
387		708
388	pthread_mutex_unlock (&reslock);	709	if (nreqs <= max_outstanding)
389
390	if (!req)
391	break;	710	break;
392		711
393	--nreqs;	712	poll_wait ();
394		713
395	if (req->type == REQ_QUIT)	714	max = 0;
396	started--;
397	else if (req->type == REQ_GROUP && req->length)
398	{
399	req->fd = 1; /* mark request as delayed */
400	continue;
401	}
402	else
403	{
404	if (req->type == REQ_READ)
405	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
406
407	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
408	SvREADONLY_off (req->data);
409
410	if (req->statdata)
411	{
412	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
413	PL_laststatval = req->result;
414	PL_statcache = *(req->statdata);
415	}
416
417	req_invoke (req);
418
419	count++;
420	}
421
422	req_free (req);
423	}	715	}
424		716
425	return count;	717	return count;
426	}
427
428	static void *aio_proc(void *arg);
429
430	static void start_thread (void)
431	{
432	sigset_t fullsigset, oldsigset;
433	pthread_t tid;
434	pthread_attr_t attr;
435
436	pthread_attr_init (&attr);
437	pthread_attr_setstacksize (&attr, STACKSIZE);
438	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
439
440	sigfillset (&fullsigset);
441	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
442
443	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
444	started++;
445
446	sigprocmask (SIG_SETMASK, &oldsigset, 0);
447	}
448
449	static void req_send (aio_req req)
450	{
451	while (started < wanted && nreqs >= started)
452	start_thread ();
453
454	++nreqs;
455
456	pthread_mutex_lock (&reqlock);
457
458	req->next = 0;
459
460	if (reqe)
461	{
462	reqe->next = req;
463	reqe = req;
464	}
465	else
466	reqe = reqs = req;
467
468	pthread_cond_signal (&reqwait);
469	pthread_mutex_unlock (&reqlock);
470
471	if (nreqs > max_outstanding)
472	for (;;)
473	{
474	poll_cb ();
475
476	if (nreqs <= max_outstanding)
477	break;
478
479	poll_wait ();
480	}
481	}
482
483	static void end_thread (void)
484	{
485	aio_req req;
486	Newz (0, req, 1, aio_cb);
487	req->type = REQ_QUIT;
488
489	req_send (req);
490	}
491
492	static void min_parallel (int nthreads)
493	{
494	if (wanted < nthreads)
495	wanted = nthreads;
496	}
497
498	static void max_parallel (int nthreads)
499	{
500	int cur = started;
501
502	if (wanted > nthreads)
503	wanted = nthreads;
504
505	while (cur > wanted)
506	{
507	end_thread ();
508	cur--;
509	}
510
511	while (started > wanted)
512	{
513	poll_wait ();
514	poll_cb ();
515	}
516	}	718	}
517		719
518	static void create_pipe ()	720	static void create_pipe ()
519	{	721	{
520	if (pipe (respipe))	722	if (pipe (respipe))
…		…
544	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)
545	{	747	{
546	ssize_t res;	748	ssize_t res;
547	off_t ooffset;	749	off_t ooffset;
548		750
549	pthread_mutex_lock (&preadwritelock);	751	LOCK (preadwritelock);
550	ooffset = lseek (fd, 0, SEEK_CUR);	752	ooffset = lseek (fd, 0, SEEK_CUR);
551	lseek (fd, offset, SEEK_SET);	753	lseek (fd, offset, SEEK_SET);
552	res = read (fd, buf, count);	754	res = read (fd, buf, count);
553	lseek (fd, ooffset, SEEK_SET);	755	lseek (fd, ooffset, SEEK_SET);
554	pthread_mutex_unlock (&preadwritelock);	756	UNLOCK (preadwritelock);
555		757
556	return res;	758	return res;
557	}	759	}
558		760
559	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)
560	{	762	{
561	ssize_t res;	763	ssize_t res;
562	off_t ooffset;	764	off_t ooffset;
563		765
564	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
565	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
566	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
567	res = write (fd, buf, count);	769	res = write (fd, buf, count);
568	lseek (fd, offset, SEEK_SET);	770	lseek (fd, offset, SEEK_SET);
569	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
570		772
571	return res;	773	return res;
572	}	774	}
573	#endif	775	#endif
574		776
575	#if !HAVE_FDATASYNC	777	#if !HAVE_FDATASYNC
576	# define fdatasync fsync	778	# define fdatasync fsync
577	#endif	779	#endif
578		780
579	#if !HAVE_READAHEAD	781	#if !HAVE_READAHEAD
580	# define readahead aio_readahead	782	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
581		783
582	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)
583	{	785	{
584	char readahead_buf[4096];	786	dBUF;
585		787
586	while (count > 0)	788	while (count > 0)
587	{	789	{
588	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	790	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
589		791
590	pread (fd, readahead_buf, len, offset);	792	pread (fd, aio_buf, len, offset);
591	offset += len;	793	offset += len;
592	count -= len;	794	count -= len;
593	}	795	}
594		796
595	errno = 0;	797	errno = 0;
596	}	798	}
		799
597	#endif	800	#endif
598		801
599	#if !HAVE_READDIR_R	802	#if !HAVE_READDIR_R
600	# define readdir_r aio_readdir_r	803	# define readdir_r aio_readdir_r
601		804
…		…
604	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)
605	{	808	{
606	struct dirent *e;	809	struct dirent *e;
607	int errorno;	810	int errorno;
608		811
609	pthread_mutex_lock (&readdirlock);	812	LOCK (readdirlock);
610		813
611	e = readdir (dirp);	814	e = readdir (dirp);
612	errorno = errno;	815	errorno = errno;
613		816
614	if (e)	817	if (e)
…		…
617	strcpy (ent->d_name, e->d_name);	820	strcpy (ent->d_name, e->d_name);
618	}	821	}
619	else	822	else
620	*res = 0;	823	*res = 0;
621		824
622	pthread_mutex_unlock (&readdirlock);	825	UNLOCK (readdirlock);
623		826
624	errno = errorno;	827	errno = errorno;
625	return e ? 0 : -1;	828	return e ? 0 : -1;
626	}	829	}
627	#endif	830	#endif
628		831
629	/* sendfile always needs emulation */	832	/* sendfile always needs emulation */
630	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)
631	{	834	{
632	ssize_t res;	835	ssize_t res;
633		836
634	if (!count)	837	if (!count)
635	return 0;	838	return 0;
…		…
646	{	849	{
647	off_t sbytes;	850	off_t sbytes;
648	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	851	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
649		852
650	if (res < 0 && sbytes)	853	if (res < 0 && sbytes)
651	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	854	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
652	res = sbytes;	855	res = sbytes;
653	}	856	}
654		857
655	# elif __hpux	858	# elif __hpux
656	res = sendfile (ofd, ifd, offset, count, 0, 0);	859	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
684	#endif	887	#endif
685	)	888	)
686	)	889	)
687	{	890	{
688	/* emulate sendfile. this is a major pain in the ass */	891	/* emulate sendfile. this is a major pain in the ass */
689	char buf[4096];	892	dBUF;
		893
690	res = 0;	894	res = 0;
691		895
692	while (count)	896	while (count)
693	{	897	{
694	ssize_t cnt;	898	ssize_t cnt;
695		899
696	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	900	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
697		901
698	if (cnt <= 0)	902	if (cnt <= 0)
699	{	903	{
700	if (cnt && !res) res = -1;	904	if (cnt && !res) res = -1;
701	break;	905	break;
702	}	906	}
703		907
704	cnt = write (ofd, buf, cnt);	908	cnt = write (ofd, aio_buf, cnt);
705		909
706	if (cnt <= 0)	910	if (cnt <= 0)
707	{	911	{
708	if (cnt && !res) res = -1;	912	if (cnt && !res) res = -1;
709	break;	913	break;
…		…
717		921
718	return res;	922	return res;
719	}	923	}
720		924
721	/* read a full directory */	925	/* read a full directory */
722	static int scandir_ (const char *path, void **namesp)	926	static void scandir_ (aio_req req, worker *self)
723	{	927	{
724	DIR *dirp = opendir (path);	928	DIR *dirp;
725	union	929	union
726	{	930	{
727	struct dirent d;	931	struct dirent d;
728	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	932	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
729	} u;	933	} *u;
730	struct dirent *entp;	934	struct dirent *entp;
731	char *name, *names;	935	char *name, *names;
732	int memlen = 4096;	936	int memlen = 4096;
733	int memofs = 0;	937	int memofs = 0;
734	int res = 0;	938	int res = 0;
735	int errorno;	939	int errorno;
736		940
737	if (!dirp)	941	LOCK (wrklock);
738	return -1;	942	self->dirp = dirp = opendir (req->dataptr);
739		943	self->dbuf = u = malloc (sizeof (*u));
740	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);
741		997
742	for (;;)	998	for (;;)
743	{	999	{
744	errno = 0, readdir_r (dirp, &u.d, &entp);	1000	ts.tv_sec = time (0) + IDLE_TIMEOUT;
745		1001
746	if (!entp)	1002	LOCK (reqlock);
747	break;
748
749	name = entp->d_name;
750
751	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
752	{
753	int len = strlen (name) + 1;
754
755	res++;
756
757	while (memofs + len > memlen)
758	{
759	memlen *= 2;
760	names = realloc (names, memlen);
761	if (!names)
762	break;
763	}
764
765	memcpy (names + memofs, name, len);
766	memofs += len;
767	}
768	}
769
770	errorno = errno;
771	closedir (dirp);
772
773	if (errorno)
774	{
775	free (names);
776	errno = errorno;
777	res = -1;
778	}
779
780	*namesp = (void *)names;
781	return res;
782	}
783
784	/*****************************************************************************/
785
786	static void *aio_proc (void *thr_arg)
787	{
788	aio_req req;
789	int type;
790
791	do
792	{
793	pthread_mutex_lock (&reqlock);
794		1003
795	for (;;)	1004	for (;;)
796	{	1005	{
797	req = reqs;	1006	self->req = req = reqq_shift (&req_queue);
798
799	if (reqs)
800	{
801	reqs = reqs->next;
802	if (!reqs) reqe = 0;
803	}
804		1007
805	if (req)	1008	if (req)
806	break;	1009	break;
807		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 */
808	pthread_cond_wait (&reqwait, &reqlock);	1027	pthread_cond_wait (&reqwait, &reqlock);
		1028	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1029	}
		1030
		1031	--idle;
809	}	1032	}
810		1033
811	pthread_mutex_unlock (&reqlock);	1034	--nready;
		1035
		1036	UNLOCK (reqlock);
812		1037
813	errno = 0; /* strictly unnecessary */	1038	errno = 0; /* strictly unnecessary */
814	type = req->type; /* remember type for QUIT check */
815		1039
816	if (!(req->flags & FLAG_CANCELLED))	1040	if (!(req->flags & FLAG_CANCELLED))
817	switch (type)	1041	switch (req->type)
818	{	1042	{
819	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;
820	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;
821		1045
822	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;
823	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;
824		1048
825	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1049	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
826	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1050	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
827	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1051	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
828		1052
…		…
831	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1055	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
832	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1056	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
833	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1057	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
834	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1058	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
835	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;
836		1061
837	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1062	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
838	case REQ_FSYNC: req->result = fsync (req->fd); break;	1063	case REQ_FSYNC: req->result = fsync (req->fd); break;
839	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1064	case REQ_READDIR: scandir_ (req, self); break;
840		1065
841	case REQ_SLEEP:	1066	case REQ_BUSY:
842	{	1067	{
843	struct timeval tv;	1068	struct timeval tv;
844		1069
845	tv.tv_sec = req->fd;	1070	tv.tv_sec = req->fd;
846	tv.tv_usec = req->fd2;	1071	tv.tv_usec = req->fd2;
…		…
848	req->result = select (0, 0, 0, 0, &tv);	1073	req->result = select (0, 0, 0, 0, &tv);
849	}	1074	}
850		1075
851	case REQ_GROUP:	1076	case REQ_GROUP:
852	case REQ_NOP:	1077	case REQ_NOP:
		1078	break;
		1079
853	case REQ_QUIT:	1080	case REQ_QUIT:
854	break;	1081	goto quit;
855		1082
856	default:	1083	default:
857	req->result = ENOSYS;	1084	req->result = ENOSYS;
858	break;	1085	break;
859	}	1086	}
860		1087
861	req->errorno = errno;	1088	req->errorno = errno;
862		1089
863	pthread_mutex_lock (&reslock);	1090	LOCK (reslock);
864		1091
865	req->next = 0;	1092	++npending;
866		1093
867	if (rese)	1094	if (!reqq_push (&res_queue, req))
868	{
869	rese->next = req;
870	rese = req;
871	}
872	else
873	{
874	rese = ress = req;
875
876	/* write a dummy byte to the pipe so fh becomes ready */	1095	/* write a dummy byte to the pipe so fh becomes ready */
877	write (respipe [1], &respipe, 1);	1096	write (respipe [1], &respipe, 1);
878	}
879		1097
880	pthread_mutex_unlock (&reslock);	1098	self->req = 0;
		1099	worker_clear (self);
		1100
		1101	UNLOCK (reslock);
881	}	1102	}
882	while (type != REQ_QUIT);	1103
		1104	quit:
		1105	LOCK (wrklock);
		1106	worker_free (self);
		1107	UNLOCK (wrklock);
883		1108
884	return 0;	1109	return 0;
885	}	1110	}
886		1111
887	/*****************************************************************************/	1112	/*****************************************************************************/
888		1113
889	static void atfork_prepare (void)	1114	static void atfork_prepare (void)
890	{	1115	{
891	pthread_mutex_lock (&reqlock);	1116	LOCK (wrklock);
892	pthread_mutex_lock (&reslock);	1117	LOCK (reqlock);
		1118	LOCK (reslock);
893	#if !HAVE_PREADWRITE	1119	#if !HAVE_PREADWRITE
894	pthread_mutex_lock (&preadwritelock);	1120	LOCK (preadwritelock);
895	#endif	1121	#endif
896	#if !HAVE_READDIR_R	1122	#if !HAVE_READDIR_R
897	pthread_mutex_lock (&readdirlock);	1123	LOCK (readdirlock);
898	#endif	1124	#endif
899	}	1125	}
900		1126
901	static void atfork_parent (void)	1127	static void atfork_parent (void)
902	{	1128	{
903	#if !HAVE_READDIR_R	1129	#if !HAVE_READDIR_R
904	pthread_mutex_unlock (&readdirlock);	1130	UNLOCK (readdirlock);
905	#endif	1131	#endif
906	#if !HAVE_PREADWRITE	1132	#if !HAVE_PREADWRITE
907	pthread_mutex_unlock (&preadwritelock);	1133	UNLOCK (preadwritelock);
908	#endif	1134	#endif
909	pthread_mutex_unlock (&reslock);	1135	UNLOCK (reslock);
910	pthread_mutex_unlock (&reqlock);	1136	UNLOCK (reqlock);
		1137	UNLOCK (wrklock);
911	}	1138	}
912		1139
913	static void atfork_child (void)	1140	static void atfork_child (void)
914	{	1141	{
915	aio_req prv;	1142	aio_req prv;
916		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
917	started = 0;	1161	started = 0;
918		1162	idle = 0;
919	while (reqs)	1163	nreqs = 0;
920	{	1164	nready = 0;
921	prv = reqs;	1165	npending = 0;
922	reqs = prv->next;
923	req_free (prv);
924	}
925
926	reqs = reqe = 0;
927
928	while (ress)
929	{
930	prv = ress;
931	ress = prv->next;
932	req_free (prv);
933	}
934
935	ress = rese = 0;
936		1166
937	close (respipe [0]);	1167	close (respipe [0]);
938	close (respipe [1]);	1168	close (respipe [1]);
939	create_pipe ();	1169	create_pipe ();
940		1170
…		…
967	PROTOTYPES: ENABLE	1197	PROTOTYPES: ENABLE
968		1198
969	BOOT:	1199	BOOT:
970	{	1200	{
971	HV *stash = gv_stashpv ("IO::AIO", 1);	1201	HV *stash = gv_stashpv ("IO::AIO", 1);
		1202
972	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1203	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
973	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1204	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
974	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));
975		1209
976	create_pipe ();	1210	create_pipe ();
977	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1211	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
978	}	1212	}
979		1213
980	void	1214	void
981	min_parallel (nthreads)	1215	min_parallel (int nthreads)
982	int nthreads
983	PROTOTYPE: $	1216	PROTOTYPE: $
984		1217
985	void	1218	void
986	max_parallel (nthreads)	1219	max_parallel (int nthreads)
987	int nthreads
988	PROTOTYPE: $	1220	PROTOTYPE: $
989		1221
990	int	1222	int
991	max_outstanding (nreqs)	1223	max_outstanding (int maxreqs)
992	int nreqs	1224	PROTOTYPE: $
993	PROTOTYPE: $
994	CODE:	1225	CODE:
995	RETVAL = max_outstanding;	1226	RETVAL = max_outstanding;
996	max_outstanding = nreqs;	1227	max_outstanding = maxreqs;
		1228	OUTPUT:
		1229	RETVAL
997		1230
998	void	1231	void
999	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1232	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1000	SV * pathname	1233	SV * pathname
1001	int flags	1234	int flags
…		…
1216		1449
1217	REQ_SEND;	1450	REQ_SEND;
1218	}	1451	}
1219		1452
1220	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
1221	aio_sleep (delay,callback=&PL_sv_undef)	1473	aio_busy (delay,callback=&PL_sv_undef)
1222	double delay	1474	double delay
1223	SV * callback	1475	SV * callback
1224	PPCODE:	1476	PPCODE:
1225	{	1477	{
1226	dREQ;	1478	dREQ;
1227		1479
1228	req->type = REQ_SLEEP;	1480	req->type = REQ_BUSY;
1229	req->fd = delay < 0. ? 0 : delay;	1481	req->fd = delay < 0. ? 0 : delay;
1230	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1482	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1231		1483
1232	REQ_SEND;	1484	REQ_SEND;
1233	}	1485	}
…		…
1256	req->type = REQ_NOP;	1508	req->type = REQ_NOP;
1257		1509
1258	REQ_SEND;	1510	REQ_SEND;
1259	}	1511	}
1260		1512
1261	#if 0	1513	int
1262		1514	aioreq_pri (int pri = 0)
1263	void	1515	PROTOTYPE: ;$
1264	aio_pri (int pri = DEFAULT_PRI)
1265	CODE:	1516	CODE:
		1517	RETVAL = next_pri - PRI_BIAS;
		1518	if (items > 0)
		1519	{
1266	if (pri < PRI_MIN) pri = PRI_MIN;	1520	if (pri < PRI_MIN) pri = PRI_MIN;
1267	if (pri > PRI_MAX) pri = PRI_MAX;	1521	if (pri > PRI_MAX) pri = PRI_MAX;
1268	next_pri = pri + PRI_BIAS;	1522	next_pri = pri + PRI_BIAS;
		1523	}
		1524	OUTPUT:
		1525	RETVAL
1269		1526
1270	#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;
1271		1534
1272	void	1535	void
1273	flush ()	1536	flush ()
1274	PROTOTYPE:	1537	PROTOTYPE:
1275	CODE:	1538	CODE:
1276	while (nreqs)	1539	while (nreqs)
1277	{	1540	{
1278	poll_wait ();	1541	poll_wait ();
1279	poll_cb ();	1542	poll_cb (0);
1280	}	1543	}
1281		1544
1282	void	1545	void
1283	poll()	1546	poll()
1284	PROTOTYPE:	1547	PROTOTYPE:
1285	CODE:	1548	CODE:
1286	if (nreqs)	1549	if (nreqs)
1287	{	1550	{
1288	poll_wait ();	1551	poll_wait ();
1289	poll_cb ();	1552	poll_cb (0);
1290	}	1553	}
1291		1554
1292	int	1555	int
1293	poll_fileno()	1556	poll_fileno()
1294	PROTOTYPE:	1557	PROTOTYPE:
…		…
1299		1562
1300	int	1563	int
1301	poll_cb(...)	1564	poll_cb(...)
1302	PROTOTYPE:	1565	PROTOTYPE:
1303	CODE:	1566	CODE:
1304	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);
1305	OUTPUT:	1576	OUTPUT:
1306	RETVAL	1577	RETVAL
1307		1578
1308	void	1579	void
1309	poll_wait()	1580	poll_wait()
…		…
1318	CODE:	1589	CODE:
1319	RETVAL = nreqs;	1590	RETVAL = nreqs;
1320	OUTPUT:	1591	OUTPUT:
1321	RETVAL	1592	RETVAL
1322		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
1323	PROTOTYPES: DISABLE	1610	PROTOTYPES: DISABLE
1324		1611
1325	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1612	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1326		1613
1327	void	1614	void
1328	cancel (aio_req_ornot req)	1615	cancel (aio_req_ornot req)
1329	PROTOTYPE:
1330	CODE:	1616	CODE:
1331	req_cancel (req);	1617	req_cancel (req);
1332		1618
1333	void	1619	void
1334	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1620	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
…		…
1370	}	1656	}
1371	}	1657	}
1372	}	1658	}
1373		1659
1374	void	1660	void
		1661	cancel_subs (aio_req_ornot req)
		1662	CODE:
		1663	req_cancel_subs (req);
		1664
		1665	void
1375	result (aio_req grp, ...)	1666	result (aio_req grp, ...)
1376	CODE:	1667	CODE:
1377	{	1668	{
1378	int i;	1669	int i;
		1670	AV *av;
		1671
		1672	grp->errorno = errno;
		1673
1379	AV *av = newAV ();	1674	av = newAV ();
1380		1675
1381	for (i = 1; i < items; ++i )	1676	for (i = 1; i < items; ++i )
1382	av_push (av, newSVsv (ST (i)));	1677	av_push (av, newSVsv (ST (i)));
1383		1678
1384	SvREFCNT_dec (grp->data);	1679	SvREFCNT_dec (grp->data);
1385	grp->data = (SV *)av;	1680	grp->data = (SV *)av;
1386	}	1681	}
1387		1682
1388	void	1683	void
		1684	errno (aio_req grp, int errorno = errno)
		1685	CODE:
		1686	grp->errorno = errorno;
		1687
		1688	void
1389	feed_limit (aio_req grp, int limit)	1689	limit (aio_req grp, int limit)
1390	CODE:	1690	CODE:
1391	grp->fd2 = limit;	1691	grp->fd2 = limit;
1392	aio_grp_feed (grp);	1692	aio_grp_feed (grp);
1393		1693
1394	void	1694	void

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