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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 1.81 by root, Fri Oct 27 20:10:06 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"
…		…
39	/* used for struct dirent, AIX doesn't provide it */	48	/* used for struct dirent, AIX doesn't provide it */
40	#ifndef NAME_MAX	49	#ifndef NAME_MAX
41	# define NAME_MAX 4096	50	# define NAME_MAX 4096
42	#endif	51	#endif
43		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
		57
44	#if __ia64	58	#if __ia64
45	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
46	#else	62	#else
47	# 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
48	#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;
49		88
50	enum {	89	enum {
51	REQ_QUIT,	90	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,	93	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,	97	REQ_MKNOD, REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,	98	REQ_LINK, REQ_SYMLINK,
60	REQ_GROUP, REQ_NOP,	99	REQ_GROUP, REQ_NOP,
61	REQ_SLEEP,	100	REQ_BUSY,
62	};	101	};
63		102
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	103	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	104	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		105
…		…
100	PRI_MIN = -4,	139	PRI_MIN = -4,
101	PRI_MAX = 4,	140	PRI_MAX = 4,
102		141
103	DEFAULT_PRI = 0,	142	DEFAULT_PRI = 0,
104	PRI_BIAS = -PRI_MIN,	143	PRI_BIAS = -PRI_MIN,
		144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
105	};	145	};
106		146
107	static int next_pri = DEFAULT_PRI + PRI_BIAS;	147	static int next_pri = DEFAULT_PRI + PRI_BIAS;
108		148
109	static int started, wanted;	149	static unsigned int started, wanted;
110	static volatile int nreqs;	150
111	static int max_outstanding = 1<<30;	151	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		152	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		153	#else
		154	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		155	#endif
		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;
112	static int respipe [2];	202	static int respipe [2];
113		203
114	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
115	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
116	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
117		207
118	static volatile aio_req reqs, reqe; /* queue start, queue end */	208	#if WORDREAD_UNSAFE
119	static volatile aio_req ress, rese; /* queue start, queue end */
120		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);
121	static void req_invoke (aio_req req);	294	static void req_invoke (aio_req req);
122	static void req_free (aio_req req);	295	static void req_free (aio_req req);
		296	static void req_cancel (aio_req req);
123		297
124	/* must be called at most once */	298	/* must be called at most once */
125	static SV *req_sv (aio_req req, const char *klass)	299	static SV *req_sv (aio_req req, const char *klass)
126	{	300	{
127	if (!req->self)	301	if (!req->self)
…		…
158	ENTER;	332	ENTER;
159	SAVETMPS;	333	SAVETMPS;
160	PUSHMARK (SP);	334	PUSHMARK (SP);
161	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	335	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
162	PUTBACK;	336	PUTBACK;
163	call_sv (grp->fh2, G_VOID | G_EVAL);	337	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
164	SPAGAIN;	338	SPAGAIN;
165	FREETMPS;	339	FREETMPS;
166	LEAVE;	340	LEAVE;
167	}	341	}
168		342
…		…
189	req_invoke (grp);	363	req_invoke (grp);
190	req_free (grp);	364	req_free (grp);
191	}	365	}
192	}	366	}
193		367
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)	368	static void req_invoke (aio_req req)
216	{	369	{
217	dSP;	370	dSP;
218	int errorno = errno;
219		371
220	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))	372	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
221	return;	373	{
222
223	errno = req->errorno;
224
225	ENTER;	374	ENTER;
226	SAVETMPS;	375	SAVETMPS;
227	PUSHMARK (SP);	376	PUSHMARK (SP);
228	EXTEND (SP, 1);	377	EXTEND (SP, 1);
229		378
230	switch (req->type)	379	switch (req->type)
231	{
232	case REQ_READDIR:
233	{	380	{
234	SV *rv = &PL_sv_undef;	381	case REQ_READDIR:
235
236	if (req->result >= 0)
237	{	382	{
238	char *buf = req->data2ptr;	383	SV *rv = &PL_sv_undef;
239	AV *av = newAV ();
240		384
241	while (req->result)	385	if (req->result >= 0)
242	{	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	{
243	SV *sv = newSVpv (buf, 0);	395	SV *sv = newSVpv (buf, 0);
244		396
245	av_push (av, sv);	397	av_store (av, i, sv);
246	buf += SvCUR (sv) + 1;	398	buf += SvCUR (sv) + 1;
247	req->result--;	399	}
		400
		401	rv = sv_2mortal (newRV_noinc ((SV *)av));
248	}	402	}
249		403
250	rv = sv_2mortal (newRV_noinc ((SV *)av));	404	PUSHs (rv);
251	}	405	}
		406	break;
252		407
253	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;
254	}	446	}
255	break;
256		447
257	case REQ_OPEN:	448	errno = req->errorno;
258	{
259	/* convert fd to fh */
260	SV *fh;
261		449
262	PUSHs (sv_2mortal (newSViv (req->result)));
263	PUTBACK;	450	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);	451	call_sv (req->callback, G_VOID | G_EVAL);
300	SPAGAIN;	452	SPAGAIN;
301		453
302	FREETMPS;	454	FREETMPS;
303	LEAVE;	455	LEAVE;
304
305	errno = errorno;
306
307	if (SvTRUE (ERRSV))
308	{	456	}
309	req_free (req);
310	croak (0);
311	}
312	}
313		457
314	static void req_free (aio_req req)
315	{
316	if (req->grp)	458	if (req->grp)
317	{	459	{
318	aio_req grp = req->grp;	460	aio_req grp = req->grp;
319		461
320	/* unlink request */	462	/* unlink request */
…		…
325	grp->grp_first = req->grp_next;	467	grp->grp_first = req->grp_next;
326		468
327	aio_grp_dec (grp);	469	aio_grp_dec (grp);
328	}	470	}
329		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	{
330	if (req->self)	481	if (req->self)
331	{	482	{
332	sv_unmagic (req->self, PERL_MAGIC_ext);	483	sv_unmagic (req->self, PERL_MAGIC_ext);
333	SvREFCNT_dec (req->self);	484	SvREFCNT_dec (req->self);
334	}	485	}
…		…
337	SvREFCNT_dec (req->fh);	488	SvREFCNT_dec (req->fh);
338	SvREFCNT_dec (req->fh2);	489	SvREFCNT_dec (req->fh2);
339	SvREFCNT_dec (req->callback);	490	SvREFCNT_dec (req->callback);
340	Safefree (req->statdata);	491	Safefree (req->statdata);
341		492
342	if (req->type == REQ_READDIR && req->result >= 0)	493	if (req->type == REQ_READDIR)
343	free (req->data2ptr);	494	free (req->data2ptr);
344		495
345	Safefree (req);	496	Safefree (req);
346	}	497	}
347		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
348	static void req_cancel (aio_req req)	513	static void req_cancel (aio_req req)
349	{	514	{
350	req->flags |= FLAG_CANCELLED;	515	req->flags |= FLAG_CANCELLED;
351		516
352	if (req->type == REQ_GROUP)	517	req_cancel_subs (req);
353	{	518	}
354	aio_req sub;
355		519
356	for (sub = req->grp_first; sub; sub = sub->grp_next)	520	static void *aio_proc(void *arg);
357	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)
358	}	545	{
359	}	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);
360		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	req_send (req);
		616
		617	LOCK (wrklock);
		618	--started;
		619	UNLOCK (wrklock);
		620	}
		621
		622	static void min_parallel (int nthreads)
		623	{
		624	if (wanted < nthreads)
		625	wanted = nthreads;
		626	}
		627
		628	static void max_parallel (int nthreads)
		629	{
		630	if (wanted > nthreads)
		631	wanted = nthreads;
		632
		633	while (started > wanted)
		634	end_thread ();
		635	}
		636
		637	static void poll_wait ()
		638	{
		639	fd_set rfd;
		640
		641	while (nreqs)
		642	{
		643	int size;
		644	if (WORDREAD_UNSAFE) LOCK (reslock);
		645	size = res_queue.size;
		646	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		647
		648	if (size)
		649	return;
		650
		651	maybe_start_thread ();
		652
		653	FD_ZERO(&rfd);
		654	FD_SET(respipe [0], &rfd);
		655
		656	select (respipe [0] + 1, &rfd, 0, 0, 0);
		657	}
		658	}
		659
361	static int poll_cb ()	660	static int poll_cb (int max)
362	{	661	{
363	dSP;	662	dSP;
364	int count = 0;	663	int count = 0;
365	int do_croak = 0;	664	int do_croak = 0;
366	aio_req req;	665	aio_req req;
367		666
368	for (;;)	667	for (;;)
369	{	668	{
370	pthread_mutex_lock (&reslock);	669	while (max <= 0 || count < max)
371	req = ress;
372
373	if (req)
374	{	670	{
375	ress = req->next;	671	maybe_start_thread ();
376		672
		673	LOCK (reslock);
		674	req = reqq_shift (&res_queue);
		675
377	if (!ress)	676	if (req)
378	{	677	{
		678	--npending;
		679
		680	if (!res_queue.size)
		681	{
379	/* read any signals sent by the worker threads */	682	/* read any signals sent by the worker threads */
380	char buf [32];	683	char buf [32];
381	while (read (respipe [0], buf, 32) == 32)	684	while (read (respipe [0], buf, 32) == 32)
		685	;
382	;	686	}
383
384	rese = 0;
385	}	687	}
		688
		689	UNLOCK (reslock);
		690
		691	if (!req)
		692	break;
		693
		694	--nreqs;
		695
		696	if (req->type == REQ_GROUP && req->length)
		697	{
		698	req->fd = 1; /* mark request as delayed */
		699	continue;
		700	}
		701	else
		702	{
		703	if (req->type == REQ_READ)
		704	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		705
		706	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		707	SvREADONLY_off (req->data);
		708
		709	if (req->statdata)
		710	{
		711	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		712	PL_laststatval = req->result;
		713	PL_statcache = *(req->statdata);
		714	}
		715
		716	req_invoke (req);
		717
		718	count++;
		719	}
		720
		721	req_free (req);
386	}	722	}
387		723
388	pthread_mutex_unlock (&reslock);	724	if (nreqs <= max_outstanding)
389
390	if (!req)
391	break;	725	break;
392		726
393	--nreqs;	727	poll_wait ();
394		728
395	if (req->type == REQ_QUIT)	729	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	}	730	}
424		731
425	return count;	732	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	}	733	}
517		734
518	static void create_pipe ()	735	static void create_pipe ()
519	{	736	{
520	if (pipe (respipe))	737	if (pipe (respipe))
…		…
544	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	761	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
545	{	762	{
546	ssize_t res;	763	ssize_t res;
547	off_t ooffset;	764	off_t ooffset;
548		765
549	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
550	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
551	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
552	res = read (fd, buf, count);	769	res = read (fd, buf, count);
553	lseek (fd, ooffset, SEEK_SET);	770	lseek (fd, ooffset, SEEK_SET);
554	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
555		772
556	return res;	773	return res;
557	}	774	}
558		775
559	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	776	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
560	{	777	{
561	ssize_t res;	778	ssize_t res;
562	off_t ooffset;	779	off_t ooffset;
563		780
564	pthread_mutex_lock (&preadwritelock);	781	LOCK (preadwritelock);
565	ooffset = lseek (fd, 0, SEEK_CUR);	782	ooffset = lseek (fd, 0, SEEK_CUR);
566	lseek (fd, offset, SEEK_SET);	783	lseek (fd, offset, SEEK_SET);
567	res = write (fd, buf, count);	784	res = write (fd, buf, count);
568	lseek (fd, offset, SEEK_SET);	785	lseek (fd, offset, SEEK_SET);
569	pthread_mutex_unlock (&preadwritelock);	786	UNLOCK (preadwritelock);
570		787
571	return res;	788	return res;
572	}	789	}
573	#endif	790	#endif
574		791
575	#if !HAVE_FDATASYNC	792	#if !HAVE_FDATASYNC
576	# define fdatasync fsync	793	# define fdatasync fsync
577	#endif	794	#endif
578		795
579	#if !HAVE_READAHEAD	796	#if !HAVE_READAHEAD
580	# define readahead aio_readahead	797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
581		798
582	static ssize_t readahead (int fd, off_t offset, size_t count)	799	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
583	{	800	{
584	char readahead_buf[4096];	801	dBUF;
585		802
586	while (count > 0)	803	while (count > 0)
587	{	804	{
588	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
589		806
590	pread (fd, readahead_buf, len, offset);	807	pread (fd, aio_buf, len, offset);
591	offset += len;	808	offset += len;
592	count -= len;	809	count -= len;
593	}	810	}
594		811
595	errno = 0;	812	errno = 0;
596	}	813	}
		814
597	#endif	815	#endif
598		816
599	#if !HAVE_READDIR_R	817	#if !HAVE_READDIR_R
600	# define readdir_r aio_readdir_r	818	# define readdir_r aio_readdir_r
601		819
…		…
604	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	822	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
605	{	823	{
606	struct dirent *e;	824	struct dirent *e;
607	int errorno;	825	int errorno;
608		826
609	pthread_mutex_lock (&readdirlock);	827	LOCK (readdirlock);
610		828
611	e = readdir (dirp);	829	e = readdir (dirp);
612	errorno = errno;	830	errorno = errno;
613		831
614	if (e)	832	if (e)
…		…
617	strcpy (ent->d_name, e->d_name);	835	strcpy (ent->d_name, e->d_name);
618	}	836	}
619	else	837	else
620	*res = 0;	838	*res = 0;
621		839
622	pthread_mutex_unlock (&readdirlock);	840	UNLOCK (readdirlock);
623		841
624	errno = errorno;	842	errno = errorno;
625	return e ? 0 : -1;	843	return e ? 0 : -1;
626	}	844	}
627	#endif	845	#endif
628		846
629	/* sendfile always needs emulation */	847	/* sendfile always needs emulation */
630	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	848	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
631	{	849	{
632	ssize_t res;	850	ssize_t res;
633		851
634	if (!count)	852	if (!count)
635	return 0;	853	return 0;
…		…
646	{	864	{
647	off_t sbytes;	865	off_t sbytes;
648	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
649		867
650	if (res < 0 && sbytes)	868	if (res < 0 && sbytes)
651	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
652	res = sbytes;	870	res = sbytes;
653	}	871	}
654		872
655	# elif __hpux	873	# elif __hpux
656	res = sendfile (ofd, ifd, offset, count, 0, 0);	874	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
684	#endif	902	#endif
685	)	903	)
686	)	904	)
687	{	905	{
688	/* emulate sendfile. this is a major pain in the ass */	906	/* emulate sendfile. this is a major pain in the ass */
689	char buf[4096];	907	dBUF;
		908
690	res = 0;	909	res = 0;
691		910
692	while (count)	911	while (count)
693	{	912	{
694	ssize_t cnt;	913	ssize_t cnt;
695		914
696	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
697		916
698	if (cnt <= 0)	917	if (cnt <= 0)
699	{	918	{
700	if (cnt && !res) res = -1;	919	if (cnt && !res) res = -1;
701	break;	920	break;
702	}	921	}
703		922
704	cnt = write (ofd, buf, cnt);	923	cnt = write (ofd, aio_buf, cnt);
705		924
706	if (cnt <= 0)	925	if (cnt <= 0)
707	{	926	{
708	if (cnt && !res) res = -1;	927	if (cnt && !res) res = -1;
709	break;	928	break;
…		…
717		936
718	return res;	937	return res;
719	}	938	}
720		939
721	/* read a full directory */	940	/* read a full directory */
722	static int scandir_ (const char *path, void **namesp)	941	static void scandir_ (aio_req req, worker *self)
723	{	942	{
724	DIR *dirp = opendir (path);	943	DIR *dirp;
725	union	944	union
726	{	945	{
727	struct dirent d;	946	struct dirent d;
728	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	947	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
729	} u;	948	} *u;
730	struct dirent *entp;	949	struct dirent *entp;
731	char *name, *names;	950	char *name, *names;
732	int memlen = 4096;	951	int memlen = 4096;
733	int memofs = 0;	952	int memofs = 0;
734	int res = 0;	953	int res = 0;
735	int errorno;	954	int errorno;
736		955
737	if (!dirp)	956	LOCK (wrklock);
738	return -1;	957	self->dirp = dirp = opendir (req->dataptr);
739		958	self->dbuf = u = malloc (sizeof (*u));
740	names = malloc (memlen);	959	req->data2ptr = names = malloc (memlen);
		960	UNLOCK (wrklock);
		961
		962	if (dirp && u && names)
		963	for (;;)
		964	{
		965	errno = 0;
		966	readdir_r (dirp, &u->d, &entp);
		967
		968	if (!entp)
		969	break;
		970
		971	name = entp->d_name;
		972
		973	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		974	{
		975	int len = strlen (name) + 1;
		976
		977	res++;
		978
		979	while (memofs + len > memlen)
		980	{
		981	memlen *= 2;
		982	LOCK (wrklock);
		983	req->data2ptr = names = realloc (names, memlen);
		984	UNLOCK (wrklock);
		985
		986	if (!names)
		987	break;
		988	}
		989
		990	memcpy (names + memofs, name, len);
		991	memofs += len;
		992	}
		993	}
		994
		995	if (errno)
		996	res = -1;
		997
		998	req->result = res;
		999	}
		1000
		1001	/*****************************************************************************/
		1002
		1003	static void *aio_proc (void *thr_arg)
		1004	{
		1005	aio_req req;
		1006	worker *self = (worker *)thr_arg;
741		1007
742	for (;;)	1008	for (;;)
743	{	1009	{
744	errno = 0, readdir_r (dirp, &u.d, &entp);	1010	LOCK (reqlock);
745
746	if (!entp)
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		1011
795	for (;;)	1012	for (;;)
796	{	1013	{
797	req = reqs;	1014	self->req = req = reqq_shift (&req_queue);
798
799	if (reqs)
800	{
801	reqs = reqs->next;
802	if (!reqs) reqe = 0;
803	}
804		1015
805	if (req)	1016	if (req)
806	break;	1017	break;
807		1018
808	pthread_cond_wait (&reqwait, &reqlock);	1019	pthread_cond_wait (&reqwait, &reqlock);
809	}	1020	}
810		1021
811	pthread_mutex_unlock (&reqlock);	1022	--nready;
		1023
		1024	UNLOCK (reqlock);
812		1025
813	errno = 0; /* strictly unnecessary */	1026	errno = 0; /* strictly unnecessary */
814	type = req->type; /* remember type for QUIT check */
815		1027
816	if (!(req->flags & FLAG_CANCELLED))	1028	if (!(req->flags & FLAG_CANCELLED))
817	switch (type)	1029	switch (req->type)
818	{	1030	{
819	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1031	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;	1032	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
821		1033
822	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1034	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;	1035	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
824		1036
825	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
826	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
827	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
828		1040
…		…
831	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1043	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
832	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1044	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
833	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1045	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
834	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1046	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
835	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1047	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1048	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
836		1049
837	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1050	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
838	case REQ_FSYNC: req->result = fsync (req->fd); break;	1051	case REQ_FSYNC: req->result = fsync (req->fd); break;
839	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1052	case REQ_READDIR: scandir_ (req, self); break;
840		1053
841	case REQ_SLEEP:	1054	case REQ_BUSY:
842	{	1055	{
843	struct timeval tv;	1056	struct timeval tv;
844		1057
845	tv.tv_sec = req->fd;	1058	tv.tv_sec = req->fd;
846	tv.tv_usec = req->fd2;	1059	tv.tv_usec = req->fd2;
…		…
848	req->result = select (0, 0, 0, 0, &tv);	1061	req->result = select (0, 0, 0, 0, &tv);
849	}	1062	}
850		1063
851	case REQ_GROUP:	1064	case REQ_GROUP:
852	case REQ_NOP:	1065	case REQ_NOP:
		1066	break;
		1067
853	case REQ_QUIT:	1068	case REQ_QUIT:
		1069	LOCK (wrklock);
		1070	worker_free (self);
		1071	--started;
		1072	UNLOCK (wrklock);
854	break;	1073	return 0;
855		1074
856	default:	1075	default:
857	req->result = ENOSYS;	1076	req->result = ENOSYS;
858	break;	1077	break;
859	}	1078	}
860		1079
861	req->errorno = errno;	1080	req->errorno = errno;
862		1081
863	pthread_mutex_lock (&reslock);	1082	LOCK (reslock);
864		1083
865	req->next = 0;	1084	++npending;
866		1085
867	if (rese)	1086	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 */	1087	/* write a dummy byte to the pipe so fh becomes ready */
877	write (respipe [1], &respipe, 1);	1088	write (respipe [1], &respipe, 1);
878	}
879		1089
880	pthread_mutex_unlock (&reslock);	1090	self->req = 0;
881	}	1091	worker_clear (self);
882	while (type != REQ_QUIT);
883		1092
884	return 0;	1093	UNLOCK (reslock);
		1094	}
885	}	1095	}
886		1096
887	/*****************************************************************************/	1097	/*****************************************************************************/
888		1098
889	static void atfork_prepare (void)	1099	static void atfork_prepare (void)
890	{	1100	{
891	pthread_mutex_lock (&reqlock);	1101	LOCK (wrklock);
892	pthread_mutex_lock (&reslock);	1102	LOCK (reqlock);
		1103	LOCK (reslock);
893	#if !HAVE_PREADWRITE	1104	#if !HAVE_PREADWRITE
894	pthread_mutex_lock (&preadwritelock);	1105	LOCK (preadwritelock);
895	#endif	1106	#endif
896	#if !HAVE_READDIR_R	1107	#if !HAVE_READDIR_R
897	pthread_mutex_lock (&readdirlock);	1108	LOCK (readdirlock);
898	#endif	1109	#endif
899	}	1110	}
900		1111
901	static void atfork_parent (void)	1112	static void atfork_parent (void)
902	{	1113	{
903	#if !HAVE_READDIR_R	1114	#if !HAVE_READDIR_R
904	pthread_mutex_unlock (&readdirlock);	1115	UNLOCK (readdirlock);
905	#endif	1116	#endif
906	#if !HAVE_PREADWRITE	1117	#if !HAVE_PREADWRITE
907	pthread_mutex_unlock (&preadwritelock);	1118	UNLOCK (preadwritelock);
908	#endif	1119	#endif
909	pthread_mutex_unlock (&reslock);	1120	UNLOCK (reslock);
910	pthread_mutex_unlock (&reqlock);	1121	UNLOCK (reqlock);
		1122	UNLOCK (wrklock);
911	}	1123	}
912		1124
913	static void atfork_child (void)	1125	static void atfork_child (void)
914	{	1126	{
915	aio_req prv;	1127	aio_req prv;
916		1128
		1129	while (prv = reqq_shift (&req_queue))
		1130	req_free (prv);
		1131
		1132	while (prv = reqq_shift (&res_queue))
		1133	req_free (prv);
		1134
		1135	while (wrk_first.next != &wrk_first)
		1136	{
		1137	worker *wrk = wrk_first.next;
		1138
		1139	if (wrk->req)
		1140	req_free (wrk->req);
		1141
		1142	worker_clear (wrk);
		1143	worker_free (wrk);
		1144	}
		1145
917	started = 0;	1146	started = 0;
918		1147	nreqs = 0;
919	while (reqs)
920	{
921	prv = reqs;
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		1148
937	close (respipe [0]);	1149	close (respipe [0]);
938	close (respipe [1]);	1150	close (respipe [1]);
939	create_pipe ();	1151	create_pipe ();
940		1152
…		…
970	{	1182	{
971	HV *stash = gv_stashpv ("IO::AIO", 1);	1183	HV *stash = gv_stashpv ("IO::AIO", 1);
972	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1184	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
973	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1185	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
974	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1186	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1187	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1188	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
975		1189
976	create_pipe ();	1190	create_pipe ();
977	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1191	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
978	}
979		1192
		1193	start_thread ();
		1194	}
		1195
980	void	1196	void
981	min_parallel (nthreads)	1197	min_parallel (int nthreads)
982	int nthreads
983	PROTOTYPE: $	1198	PROTOTYPE: $
984		1199
985	void	1200	void
986	max_parallel (nthreads)	1201	max_parallel (int nthreads)
987	int nthreads
988	PROTOTYPE: $	1202	PROTOTYPE: $
989		1203
990	int	1204	int
991	max_outstanding (nreqs)	1205	max_outstanding (int maxreqs)
992	int nreqs	1206	PROTOTYPE: $
993	PROTOTYPE: $
994	CODE:	1207	CODE:
995	RETVAL = max_outstanding;	1208	RETVAL = max_outstanding;
996	max_outstanding = nreqs;	1209	max_outstanding = maxreqs;
		1210	OUTPUT:
		1211	RETVAL
997		1212
998	void	1213	void
999	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1214	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1000	SV * pathname	1215	SV * pathname
1001	int flags	1216	int flags
…		…
1216		1431
1217	REQ_SEND;	1432	REQ_SEND;
1218	}	1433	}
1219		1434
1220	void	1435	void
		1436	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1437	SV * pathname
		1438	SV * callback
		1439	UV mode
		1440	UV dev
		1441	PPCODE:
		1442	{
		1443	dREQ;
		1444
		1445	req->type = REQ_MKNOD;
		1446	req->data = newSVsv (pathname);
		1447	req->dataptr = SvPVbyte_nolen (req->data);
		1448	req->mode = (mode_t)mode;
		1449	req->offset = dev;
		1450
		1451	REQ_SEND;
		1452	}
		1453
		1454	void
1221	aio_sleep (delay,callback=&PL_sv_undef)	1455	aio_busy (delay,callback=&PL_sv_undef)
1222	double delay	1456	double delay
1223	SV * callback	1457	SV * callback
1224	PPCODE:	1458	PPCODE:
1225	{	1459	{
1226	dREQ;	1460	dREQ;
1227		1461
1228	req->type = REQ_SLEEP;	1462	req->type = REQ_BUSY;
1229	req->fd = delay < 0. ? 0 : delay;	1463	req->fd = delay < 0. ? 0 : delay;
1230	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1464	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1231		1465
1232	REQ_SEND;	1466	REQ_SEND;
1233	}	1467	}
…		…
1256	req->type = REQ_NOP;	1490	req->type = REQ_NOP;
1257		1491
1258	REQ_SEND;	1492	REQ_SEND;
1259	}	1493	}
1260		1494
1261	#if 0	1495	int
1262		1496	aioreq_pri (int pri = 0)
1263	void	1497	PROTOTYPE: ;$
1264	aio_pri (int pri = DEFAULT_PRI)
1265	CODE:	1498	CODE:
		1499	RETVAL = next_pri - PRI_BIAS;
		1500	if (items > 0)
		1501	{
1266	if (pri < PRI_MIN) pri = PRI_MIN;	1502	if (pri < PRI_MIN) pri = PRI_MIN;
1267	if (pri > PRI_MAX) pri = PRI_MAX;	1503	if (pri > PRI_MAX) pri = PRI_MAX;
1268	next_pri = pri + PRI_BIAS;	1504	next_pri = pri + PRI_BIAS;
		1505	}
		1506	OUTPUT:
		1507	RETVAL
1269		1508
1270	#endif	1509	void
		1510	aioreq_nice (int nice = 0)
		1511	CODE:
		1512	nice = next_pri - nice;
		1513	if (nice < PRI_MIN) nice = PRI_MIN;
		1514	if (nice > PRI_MAX) nice = PRI_MAX;
		1515	next_pri = nice + PRI_BIAS;
1271		1516
1272	void	1517	void
1273	flush ()	1518	flush ()
1274	PROTOTYPE:	1519	PROTOTYPE:
1275	CODE:	1520	CODE:
1276	while (nreqs)	1521	while (nreqs)
1277	{	1522	{
1278	poll_wait ();	1523	poll_wait ();
1279	poll_cb ();	1524	poll_cb (0);
1280	}	1525	}
1281		1526
1282	void	1527	void
1283	poll()	1528	poll()
1284	PROTOTYPE:	1529	PROTOTYPE:
1285	CODE:	1530	CODE:
1286	if (nreqs)	1531	if (nreqs)
1287	{	1532	{
1288	poll_wait ();	1533	poll_wait ();
1289	poll_cb ();	1534	poll_cb (0);
1290	}	1535	}
1291		1536
1292	int	1537	int
1293	poll_fileno()	1538	poll_fileno()
1294	PROTOTYPE:	1539	PROTOTYPE:
…		…
1299		1544
1300	int	1545	int
1301	poll_cb(...)	1546	poll_cb(...)
1302	PROTOTYPE:	1547	PROTOTYPE:
1303	CODE:	1548	CODE:
1304	RETVAL = poll_cb ();	1549	RETVAL = poll_cb (0);
		1550	OUTPUT:
		1551	RETVAL
		1552
		1553	int
		1554	poll_some(int max = 0)
		1555	PROTOTYPE: $
		1556	CODE:
		1557	RETVAL = poll_cb (max);
1305	OUTPUT:	1558	OUTPUT:
1306	RETVAL	1559	RETVAL
1307		1560
1308	void	1561	void
1309	poll_wait()	1562	poll_wait()
…		…
1318	CODE:	1571	CODE:
1319	RETVAL = nreqs;	1572	RETVAL = nreqs;
1320	OUTPUT:	1573	OUTPUT:
1321	RETVAL	1574	RETVAL
1322		1575
		1576	int
		1577	nready()
		1578	PROTOTYPE:
		1579	CODE:
		1580	RETVAL = get_nready ();
		1581	OUTPUT:
		1582	RETVAL
		1583
		1584	int
		1585	npending()
		1586	PROTOTYPE:
		1587	CODE:
		1588	RETVAL = get_npending ();
		1589	OUTPUT:
		1590	RETVAL
		1591
1323	PROTOTYPES: DISABLE	1592	PROTOTYPES: DISABLE
1324		1593
1325	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1594	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1326		1595
1327	void	1596	void
1328	cancel (aio_req_ornot req)	1597	cancel (aio_req_ornot req)
1329	PROTOTYPE:
1330	CODE:	1598	CODE:
1331	req_cancel (req);	1599	req_cancel (req);
1332		1600
1333	void	1601	void
1334	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1602	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
…		…
1370	}	1638	}
1371	}	1639	}
1372	}	1640	}
1373		1641
1374	void	1642	void
		1643	cancel_subs (aio_req_ornot req)
		1644	CODE:
		1645	req_cancel_subs (req);
		1646
		1647	void
1375	result (aio_req grp, ...)	1648	result (aio_req grp, ...)
1376	CODE:	1649	CODE:
1377	{	1650	{
1378	int i;	1651	int i;
		1652	AV *av;
		1653
		1654	grp->errorno = errno;
		1655
1379	AV *av = newAV ();	1656	av = newAV ();
1380		1657
1381	for (i = 1; i < items; ++i )	1658	for (i = 1; i < items; ++i )
1382	av_push (av, newSVsv (ST (i)));	1659	av_push (av, newSVsv (ST (i)));
1383		1660
1384	SvREFCNT_dec (grp->data);	1661	SvREFCNT_dec (grp->data);
1385	grp->data = (SV *)av;	1662	grp->data = (SV *)av;
1386	}	1663	}
1387		1664
1388	void	1665	void
		1666	errno (aio_req grp, int errorno = errno)
		1667	CODE:
		1668	grp->errorno = errorno;
		1669
		1670	void
1389	feed_limit (aio_req grp, int limit)	1671	limit (aio_req grp, int limit)
1390	CODE:	1672	CODE:
1391	grp->fd2 = limit;	1673	grp->fd2 = limit;
1392	aio_grp_feed (grp);	1674	aio_grp_feed (grp);
1393		1675
1394	void	1676	void

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