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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.63 by root, Mon Oct 23 23:48:31 2006 UTC vs.
Revision 1.85 by root, Sat Oct 28 23:32:29 2006 UTC

1	#if __linux	1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
2	# define _GNU_SOURCE	5	# define _GNU_SOURCE
3	#endif	6	#endif
4		7
		8	/* just in case */
5	#define _REENTRANT 1	9	#define _REENTRANT 1
6		10
7	#include <errno.h>	11	#include <errno.h>
8		12
9	#include "EXTERN.h"	13	#include "EXTERN.h"
…		…
39	# else	43	# else
40	# error sendfile support requested but not available	44	# error sendfile support requested but not available
41	# endif	45	# endif
42	#endif	46	#endif
43		47
		48	/* number of seconds after which idle threads exit */
		49	#define IDLE_TIMEOUT 10
		50
44	/* used for struct dirent, AIX doesn't provide it */	51	/* used for struct dirent, AIX doesn't provide it */
45	#ifndef NAME_MAX	52	#ifndef NAME_MAX
46	# define NAME_MAX 4096	53	# define NAME_MAX 4096
47	#endif	54	#endif
48		55
		56	#ifndef PTHREAD_STACK_MIN
		57	/* care for broken platforms, e.g. windows */
		58	# define PTHREAD_STACK_MIN 16384
		59	#endif
		60
49	#if __ia64	61	#if __ia64
50	# define STACKSIZE 65536	62	# define STACKSIZE 65536
		63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		64	# define STACKSIZE PTHREAD_STACK_MIN
51	#else	65	#else
52	# 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 WORDACCESS_UNSAFE
		74	# if __i386 || __x86_64
		75	# define WORDACCESS_UNSAFE 0
		76	# else
		77	# define WORDACCESS_UNSAFE 1
53	#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;
54		91
55	enum {	92	enum {
56	REQ_QUIT,	93	REQ_QUIT,
57	REQ_OPEN, REQ_CLOSE,	94	REQ_OPEN, REQ_CLOSE,
58	REQ_READ, REQ_WRITE, REQ_READAHEAD,	95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
59	REQ_SENDFILE,	96	REQ_SENDFILE,
60	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
61	REQ_FSYNC, REQ_FDATASYNC,	98	REQ_FSYNC, REQ_FDATASYNC,
62	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
63	REQ_READDIR,	100	REQ_MKNOD, REQ_READDIR,
64	REQ_LINK, REQ_SYMLINK,	101	REQ_LINK, REQ_SYMLINK,
65	REQ_GROUP, REQ_NOP,	102	REQ_GROUP, REQ_NOP,
66	REQ_SLEEP,	103	REQ_BUSY,
67	};	104	};
68		105
69	#define AIO_REQ_KLASS "IO::AIO::REQ"	106	#define AIO_REQ_KLASS "IO::AIO::REQ"
70	#define AIO_GRP_KLASS "IO::AIO::GRP"	107	#define AIO_GRP_KLASS "IO::AIO::GRP"
71		108
…		…
105	PRI_MIN = -4,	142	PRI_MIN = -4,
106	PRI_MAX = 4,	143	PRI_MAX = 4,
107		144
108	DEFAULT_PRI = 0,	145	DEFAULT_PRI = 0,
109	PRI_BIAS = -PRI_MIN,	146	PRI_BIAS = -PRI_MIN,
		147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
110	};	148	};
111		149
		150	#define AIO_TICKS ((1000000 + 1023) >> 10)
		151
		152	static unsigned int max_poll_time = 0;
		153	static unsigned int max_poll_reqs = 0;
		154
		155	/* calculcate time difference in ~1/AIO_TICKS of a second */
		156	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		157	{
		158	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		159	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		160	}
		161
112	static int next_pri = DEFAULT_PRI + PRI_BIAS;	162	static int next_pri = DEFAULT_PRI + PRI_BIAS;
113		163
114	static int started, wanted;	164	static unsigned int started, idle, wanted;
115	static volatile int nreqs;
116	static int max_outstanding = 1<<30;
117	static int respipe [2];
118		165
119	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	166	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
120	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP	167	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
121	#else	168	#else
122	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER	169	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
123	#endif	170	#endif
124		171
		172	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		173	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		174
		175	/* worker threads management */
		176	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		177
		178	typedef struct worker {
		179	/* locked by wrklock */
		180	struct worker *prev, *next;
		181
		182	pthread_t tid;
		183
		184	/* locked by reslock, reqlock or wrklock */
		185	aio_req req; /* currently processed request */
		186	void *dbuf;
		187	DIR *dirp;
		188	} worker;
		189
		190	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		191
		192	static void worker_clear (worker *wrk)
		193	{
		194	if (wrk->dirp)
		195	{
		196	closedir (wrk->dirp);
		197	wrk->dirp = 0;
		198	}
		199
		200	if (wrk->dbuf)
		201	{
		202	free (wrk->dbuf);
		203	wrk->dbuf = 0;
		204	}
		205	}
		206
		207	static void worker_free (worker *wrk)
		208	{
		209	wrk->next->prev = wrk->prev;
		210	wrk->prev->next = wrk->next;
		211
		212	free (wrk);
		213	}
		214
		215	static volatile unsigned int nreqs, nready, npending;
		216	static volatile unsigned int max_idle = 4;
		217	static volatile unsigned int max_outstanding = 0xffffffff;
		218	static int respipe [2];
		219
125	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	220	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
126	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;	221	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
127	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	222	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
128		223
129	static volatile aio_req reqs, reqe; /* queue start, queue end */	224	#if WORDACCESS_UNSAFE
130	static volatile aio_req ress, rese; /* queue start, queue end */
131		225
		226	static unsigned int get_nready ()
		227	{
		228	unsigned int retval;
		229
		230	LOCK (reqlock);
		231	retval = nready;
		232	UNLOCK (reqlock);
		233
		234	return retval;
		235	}
		236
		237	static unsigned int get_npending ()
		238	{
		239	unsigned int retval;
		240
		241	LOCK (reslock);
		242	retval = npending;
		243	UNLOCK (reslock);
		244
		245	return retval;
		246	}
		247
		248	static unsigned int get_nthreads ()
		249	{
		250	unsigned int retval;
		251
		252	LOCK (wrklock);
		253	retval = started;
		254	UNLOCK (wrklock);
		255
		256	return retval;
		257	}
		258
		259	#else
		260
		261	# define get_nready() nready
		262	# define get_npending() npending
		263	# define get_nthreads() started
		264
		265	#endif
		266
		267	/*
		268	* a somewhat faster data structure might be nice, but
		269	* with 8 priorities this actually needs <20 insns
		270	* per shift, the most expensive operation.
		271	*/
		272	typedef struct {
		273	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		274	int size;
		275	} reqq;
		276
		277	static reqq req_queue;
		278	static reqq res_queue;
		279
		280	int reqq_push (reqq *q, aio_req req)
		281	{
		282	int pri = req->pri;
		283	req->next = 0;
		284
		285	if (q->qe[pri])
		286	{
		287	q->qe[pri]->next = req;
		288	q->qe[pri] = req;
		289	}
		290	else
		291	q->qe[pri] = q->qs[pri] = req;
		292
		293	return q->size++;
		294	}
		295
		296	aio_req reqq_shift (reqq *q)
		297	{
		298	int pri;
		299
		300	if (!q->size)
		301	return 0;
		302
		303	--q->size;
		304
		305	for (pri = NUM_PRI; pri--; )
		306	{
		307	aio_req req = q->qs[pri];
		308
		309	if (req)
		310	{
		311	if (!(q->qs[pri] = req->next))
		312	q->qe[pri] = 0;
		313
		314	return req;
		315	}
		316	}
		317
		318	abort ();
		319	}
		320
		321	static int poll_cb ();
132	static void req_invoke (aio_req req);	322	static void req_invoke (aio_req req);
133	static void req_free (aio_req req);	323	static void req_free (aio_req req);
		324	static void req_cancel (aio_req req);
134		325
135	/* must be called at most once */	326	/* must be called at most once */
136	static SV *req_sv (aio_req req, const char *klass)	327	static SV *req_sv (aio_req req, const char *klass)
137	{	328	{
138	if (!req->self)	329	if (!req->self)
…		…
169	ENTER;	360	ENTER;
170	SAVETMPS;	361	SAVETMPS;
171	PUSHMARK (SP);	362	PUSHMARK (SP);
172	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	363	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
173	PUTBACK;	364	PUTBACK;
174	call_sv (grp->fh2, G_VOID | G_EVAL);	365	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
175	SPAGAIN;	366	SPAGAIN;
176	FREETMPS;	367	FREETMPS;
177	LEAVE;	368	LEAVE;
178	}	369	}
179		370
…		…
200	req_invoke (grp);	391	req_invoke (grp);
201	req_free (grp);	392	req_free (grp);
202	}	393	}
203	}	394	}
204		395
205	static void poll_wait ()
206	{
207	fd_set rfd;
208
209	while (nreqs)
210	{
211	aio_req req;
212	pthread_mutex_lock (&reslock);
213	req = ress;
214	pthread_mutex_unlock (&reslock);
215
216	if (req)
217	return;
218
219	FD_ZERO(&rfd);
220	FD_SET(respipe [0], &rfd);
221
222	select (respipe [0] + 1, &rfd, 0, 0, 0);
223	}
224	}
225
226	static void req_invoke (aio_req req)	396	static void req_invoke (aio_req req)
227	{	397	{
228	dSP;	398	dSP;
229	int errorno = errno;
230		399
231	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))	400	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
232	return;	401	{
233
234	errno = req->errorno;
235
236	ENTER;	402	ENTER;
237	SAVETMPS;	403	SAVETMPS;
238	PUSHMARK (SP);	404	PUSHMARK (SP);
239	EXTEND (SP, 1);	405	EXTEND (SP, 1);
240		406
241	switch (req->type)	407	switch (req->type)
242	{
243	case REQ_READDIR:
244	{	408	{
245	SV *rv = &PL_sv_undef;	409	case REQ_READDIR:
246
247	if (req->result >= 0)
248	{	410	{
249	char *buf = req->data2ptr;	411	SV *rv = &PL_sv_undef;
250	AV *av = newAV ();
251		412
252	while (req->result)	413	if (req->result >= 0)
253	{	414	{
		415	int i;
		416	char *buf = req->data2ptr;
		417	AV *av = newAV ();
		418
		419	av_extend (av, req->result - 1);
		420
		421	for (i = 0; i < req->result; ++i)
		422	{
254	SV *sv = newSVpv (buf, 0);	423	SV *sv = newSVpv (buf, 0);
255		424
256	av_push (av, sv);	425	av_store (av, i, sv);
257	buf += SvCUR (sv) + 1;	426	buf += SvCUR (sv) + 1;
258	req->result--;	427	}
		428
		429	rv = sv_2mortal (newRV_noinc ((SV *)av));
259	}	430	}
260		431
261	rv = sv_2mortal (newRV_noinc ((SV *)av));	432	PUSHs (rv);
262	}	433	}
		434	break;
263		435
264	PUSHs (rv);	436	case REQ_OPEN:
		437	{
		438	/* convert fd to fh */
		439	SV *fh;
		440
		441	PUSHs (sv_2mortal (newSViv (req->result)));
		442	PUTBACK;
		443	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		444	SPAGAIN;
		445
		446	fh = SvREFCNT_inc (POPs);
		447
		448	PUSHMARK (SP);
		449	XPUSHs (sv_2mortal (fh));
		450	}
		451	break;
		452
		453	case REQ_GROUP:
		454	req->fd = 2; /* mark group as finished */
		455
		456	if (req->data)
		457	{
		458	int i;
		459	AV *av = (AV *)req->data;
		460
		461	EXTEND (SP, AvFILL (av) + 1);
		462	for (i = 0; i <= AvFILL (av); ++i)
		463	PUSHs (*av_fetch (av, i, 0));
		464	}
		465	break;
		466
		467	case REQ_NOP:
		468	case REQ_BUSY:
		469	break;
		470
		471	default:
		472	PUSHs (sv_2mortal (newSViv (req->result)));
		473	break;
265	}	474	}
266	break;
267		475
268	case REQ_OPEN:	476	errno = req->errorno;
269	{
270	/* convert fd to fh */
271	SV *fh;
272		477
273	PUSHs (sv_2mortal (newSViv (req->result)));
274	PUTBACK;	478	PUTBACK;
275	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
276	SPAGAIN;
277
278	fh = SvREFCNT_inc (POPs);
279
280	PUSHMARK (SP);
281	XPUSHs (sv_2mortal (fh));
282	}
283	break;
284
285	case REQ_GROUP:
286	req->fd = 2; /* mark group as finished */
287
288	if (req->data)
289	{
290	int i;
291	AV *av = (AV *)req->data;
292
293	EXTEND (SP, AvFILL (av) + 1);
294	for (i = 0; i <= AvFILL (av); ++i)
295	PUSHs (*av_fetch (av, i, 0));
296	}
297	break;
298
299	case REQ_NOP:
300	case REQ_SLEEP:
301	break;
302
303	default:
304	PUSHs (sv_2mortal (newSViv (req->result)));
305	break;
306	}
307
308
309	PUTBACK;
310	call_sv (req->callback, G_VOID | G_EVAL);	479	call_sv (req->callback, G_VOID | G_EVAL);
311	SPAGAIN;	480	SPAGAIN;
312		481
313	FREETMPS;	482	FREETMPS;
314	LEAVE;	483	LEAVE;
315
316	errno = errorno;
317
318	if (SvTRUE (ERRSV))
319	{	484	}
320	req_free (req);
321	croak (0);
322	}
323	}
324		485
325	static void req_free (aio_req req)
326	{
327	if (req->grp)	486	if (req->grp)
328	{	487	{
329	aio_req grp = req->grp;	488	aio_req grp = req->grp;
330		489
331	/* unlink request */	490	/* unlink request */
…		…
336	grp->grp_first = req->grp_next;	495	grp->grp_first = req->grp_next;
337		496
338	aio_grp_dec (grp);	497	aio_grp_dec (grp);
339	}	498	}
340		499
		500	if (SvTRUE (ERRSV))
		501	{
		502	req_free (req);
		503	croak (0);
		504	}
		505	}
		506
		507	static void req_free (aio_req req)
		508	{
341	if (req->self)	509	if (req->self)
342	{	510	{
343	sv_unmagic (req->self, PERL_MAGIC_ext);	511	sv_unmagic (req->self, PERL_MAGIC_ext);
344	SvREFCNT_dec (req->self);	512	SvREFCNT_dec (req->self);
345	}	513	}
…		…
348	SvREFCNT_dec (req->fh);	516	SvREFCNT_dec (req->fh);
349	SvREFCNT_dec (req->fh2);	517	SvREFCNT_dec (req->fh2);
350	SvREFCNT_dec (req->callback);	518	SvREFCNT_dec (req->callback);
351	Safefree (req->statdata);	519	Safefree (req->statdata);
352		520
353	if (req->type == REQ_READDIR && req->result >= 0)	521	if (req->type == REQ_READDIR)
354	free (req->data2ptr);	522	free (req->data2ptr);
355		523
356	Safefree (req);	524	Safefree (req);
357	}	525	}
358		526
		527	static void req_cancel_subs (aio_req grp)
		528	{
		529	aio_req sub;
		530
		531	if (grp->type != REQ_GROUP)
		532	return;
		533
		534	SvREFCNT_dec (grp->fh2);
		535	grp->fh2 = 0;
		536
		537	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		538	req_cancel (sub);
		539	}
		540
359	static void req_cancel (aio_req req)	541	static void req_cancel (aio_req req)
360	{	542	{
361	req->flags |= FLAG_CANCELLED;	543	req->flags |= FLAG_CANCELLED;
362		544
363	if (req->type == REQ_GROUP)	545	req_cancel_subs (req);
364	{
365	aio_req sub;
366
367	for (sub = req->grp_first; sub; sub = sub->grp_next)
368	req_cancel (sub);
369	}
370	}
371
372	static int poll_cb ()
373	{
374	dSP;
375	int count = 0;
376	int do_croak = 0;
377	aio_req req;
378
379	for (;;)
380	{
381	pthread_mutex_lock (&reslock);
382	req = ress;
383
384	if (req)
385	{
386	ress = req->next;
387
388	if (!ress)
389	{
390	/* read any signals sent by the worker threads */
391	char buf [32];
392	while (read (respipe [0], buf, 32) == 32)
393	;
394
395	rese = 0;
396	}
397	}
398
399	pthread_mutex_unlock (&reslock);
400
401	if (!req)
402	break;
403
404	--nreqs;
405
406	if (req->type == REQ_QUIT)
407	started--;
408	else if (req->type == REQ_GROUP && req->length)
409	{
410	req->fd = 1; /* mark request as delayed */
411	continue;
412	}
413	else
414	{
415	if (req->type == REQ_READ)
416	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
417
418	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
419	SvREADONLY_off (req->data);
420
421	if (req->statdata)
422	{
423	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
424	PL_laststatval = req->result;
425	PL_statcache = *(req->statdata);
426	}
427
428	req_invoke (req);
429
430	count++;
431	}
432
433	req_free (req);
434	}
435
436	return count;
437	}	546	}
438		547
439	static void *aio_proc(void *arg);	548	static void *aio_proc(void *arg);
440		549
441	static void start_thread (void)	550	static void start_thread (void)
442	{	551	{
443	sigset_t fullsigset, oldsigset;	552	sigset_t fullsigset, oldsigset;
444	pthread_t tid;
445	pthread_attr_t attr;	553	pthread_attr_t attr;
		554
		555	worker *wrk = calloc (1, sizeof (worker));
		556
		557	if (!wrk)
		558	croak ("unable to allocate worker thread data");
446		559
447	pthread_attr_init (&attr);	560	pthread_attr_init (&attr);
448	pthread_attr_setstacksize (&attr, STACKSIZE);	561	pthread_attr_setstacksize (&attr, STACKSIZE);
449	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	562	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		563	#ifdef PTHREAD_SCOPE_PROCESS
		564	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		565	#endif
450		566
451	sigfillset (&fullsigset);	567	sigfillset (&fullsigset);
		568
		569	LOCK (wrklock);
452	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	570	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
453		571
454	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	572	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		573	{
		574	wrk->prev = &wrk_first;
		575	wrk->next = wrk_first.next;
		576	wrk_first.next->prev = wrk;
		577	wrk_first.next = wrk;
455	started++;	578	++started;
		579	}
		580	else
		581	free (wrk);
456		582
457	sigprocmask (SIG_SETMASK, &oldsigset, 0);	583	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		584	UNLOCK (wrklock);
		585	}
		586
		587	static void maybe_start_thread ()
		588	{
		589	if (get_nthreads () >= wanted)
		590	return;
		591
		592	/* todo: maybe use idle here, but might be less exact */
		593	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		594	return;
		595
		596	start_thread ();
458	}	597	}
459		598
460	static void req_send (aio_req req)	599	static void req_send (aio_req req)
461	{	600	{
462	while (started < wanted && nreqs >= started)
463	start_thread ();
464
465	++nreqs;	601	++nreqs;
466		602
467	pthread_mutex_lock (&reqlock);	603	LOCK (reqlock);
468		604	++nready;
469	req->next = 0;	605	reqq_push (&req_queue, req);
470
471	if (reqe)
472	{
473	reqe->next = req;
474	reqe = req;
475	}
476	else
477	reqe = reqs = req;
478
479	pthread_cond_signal (&reqwait);	606	pthread_cond_signal (&reqwait);
480	pthread_mutex_unlock (&reqlock);	607	UNLOCK (reqlock);
481		608
482	if (nreqs > max_outstanding)	609	maybe_start_thread ();
483	for (;;)
484	{
485	poll_cb ();
486
487	if (nreqs <= max_outstanding)
488	break;
489
490	poll_wait ();
491	}
492	}	610	}
493		611
494	static void end_thread (void)	612	static void end_thread (void)
495	{	613	{
496	aio_req req;	614	aio_req req;
		615
497	Newz (0, req, 1, aio_cb);	616	Newz (0, req, 1, aio_cb);
		617
498	req->type = REQ_QUIT;	618	req->type = REQ_QUIT;
		619	req->pri = PRI_MAX + PRI_BIAS;
499		620
500	req_send (req);	621	LOCK (reqlock);
		622	reqq_push (&req_queue, req);
		623	pthread_cond_signal (&reqwait);
		624	UNLOCK (reqlock);
		625
		626	LOCK (wrklock);
		627	--started;
		628	UNLOCK (wrklock);
		629	}
		630
		631	static void set_max_idle (int nthreads)
		632	{
		633	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		634	max_idle = nthreads <= 0 ? 1 : nthreads;
		635	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
501	}	636	}
502		637
503	static void min_parallel (int nthreads)	638	static void min_parallel (int nthreads)
504	{	639	{
505	if (wanted < nthreads)	640	if (wanted < nthreads)
506	wanted = nthreads;	641	wanted = nthreads;
507	}	642	}
508		643
509	static void max_parallel (int nthreads)	644	static void max_parallel (int nthreads)
510	{	645	{
511	int cur = started;
512
513	if (wanted > nthreads)	646	if (wanted > nthreads)
514	wanted = nthreads;	647	wanted = nthreads;
515		648
516	while (cur > wanted)
517	{
518	end_thread ();
519	cur--;
520	}
521
522	while (started > wanted)	649	while (started > wanted)
		650	end_thread ();
		651	}
		652
		653	static void poll_wait ()
		654	{
		655	fd_set rfd;
		656
		657	while (nreqs)
		658	{
		659	int size;
		660	if (WORDACCESS_UNSAFE) LOCK (reslock);
		661	size = res_queue.size;
		662	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		663
		664	if (size)
		665	return;
		666
		667	maybe_start_thread ();
		668
		669	FD_ZERO(&rfd);
		670	FD_SET(respipe [0], &rfd);
		671
		672	select (respipe [0] + 1, &rfd, 0, 0, 0);
523	{	673	}
		674	}
		675
		676	static int poll_cb ()
		677	{
		678	dSP;
		679	int count = 0;
		680	int maxreqs = max_poll_reqs;
		681	int do_croak = 0;
		682	struct timeval tv_start, tv_now;
		683	aio_req req;
		684
		685	if (max_poll_time)
		686	gettimeofday (&tv_start, 0);
		687
		688	for (;;)
		689	{
		690	for (;;)
		691	{
		692	maybe_start_thread ();
		693
		694	LOCK (reslock);
		695	req = reqq_shift (&res_queue);
		696
		697	if (req)
		698	{
		699	--npending;
		700
		701	if (!res_queue.size)
		702	{
		703	/* read any signals sent by the worker threads */
		704	char buf [32];
		705	while (read (respipe [0], buf, 32) == 32)
		706	;
		707	}
		708	}
		709
		710	UNLOCK (reslock);
		711
		712	if (!req)
		713	break;
		714
		715	--nreqs;
		716
		717	if (req->type == REQ_GROUP && req->length)
		718	{
		719	req->fd = 1; /* mark request as delayed */
		720	continue;
		721	}
		722	else
		723	{
		724	if (req->type == REQ_READ)
		725	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		726
		727	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		728	SvREADONLY_off (req->data);
		729
		730	if (req->statdata)
		731	{
		732	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		733	PL_laststatval = req->result;
		734	PL_statcache = *(req->statdata);
		735	}
		736
		737	req_invoke (req);
		738
		739	count++;
		740	}
		741
		742	req_free (req);
		743
		744	if (maxreqs && !--maxreqs)
		745	break;
		746
		747	if (max_poll_time)
		748	{
		749	gettimeofday (&tv_now, 0);
		750
		751	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		752	break;
		753	}
		754	}
		755
		756	if (nreqs <= max_outstanding)
		757	break;
		758
524	poll_wait ();	759	poll_wait ();
525	poll_cb ();	760
		761	++maxreqs;
526	}	762	}
		763
		764	return count;
527	}	765	}
528		766
529	static void create_pipe ()	767	static void create_pipe ()
530	{	768	{
531	if (pipe (respipe))	769	if (pipe (respipe))
…		…
555	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	793	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
556	{	794	{
557	ssize_t res;	795	ssize_t res;
558	off_t ooffset;	796	off_t ooffset;
559		797
560	pthread_mutex_lock (&preadwritelock);	798	LOCK (preadwritelock);
561	ooffset = lseek (fd, 0, SEEK_CUR);	799	ooffset = lseek (fd, 0, SEEK_CUR);
562	lseek (fd, offset, SEEK_SET);	800	lseek (fd, offset, SEEK_SET);
563	res = read (fd, buf, count);	801	res = read (fd, buf, count);
564	lseek (fd, ooffset, SEEK_SET);	802	lseek (fd, ooffset, SEEK_SET);
565	pthread_mutex_unlock (&preadwritelock);	803	UNLOCK (preadwritelock);
566		804
567	return res;	805	return res;
568	}	806	}
569		807
570	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	808	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
571	{	809	{
572	ssize_t res;	810	ssize_t res;
573	off_t ooffset;	811	off_t ooffset;
574		812
575	pthread_mutex_lock (&preadwritelock);	813	LOCK (preadwritelock);
576	ooffset = lseek (fd, 0, SEEK_CUR);	814	ooffset = lseek (fd, 0, SEEK_CUR);
577	lseek (fd, offset, SEEK_SET);	815	lseek (fd, offset, SEEK_SET);
578	res = write (fd, buf, count);	816	res = write (fd, buf, count);
579	lseek (fd, offset, SEEK_SET);	817	lseek (fd, offset, SEEK_SET);
580	pthread_mutex_unlock (&preadwritelock);	818	UNLOCK (preadwritelock);
581		819
582	return res;	820	return res;
583	}	821	}
584	#endif	822	#endif
585		823
586	#if !HAVE_FDATASYNC	824	#if !HAVE_FDATASYNC
587	# define fdatasync fsync	825	# define fdatasync fsync
588	#endif	826	#endif
589		827
590	#if !HAVE_READAHEAD	828	#if !HAVE_READAHEAD
591	# define readahead aio_readahead	829	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
592		830
593	static ssize_t readahead (int fd, off_t offset, size_t count)	831	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
594	{	832	{
595	char readahead_buf[4096];	833	dBUF;
596		834
597	while (count > 0)	835	while (count > 0)
598	{	836	{
599	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	837	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
600		838
601	pread (fd, readahead_buf, len, offset);	839	pread (fd, aio_buf, len, offset);
602	offset += len;	840	offset += len;
603	count -= len;	841	count -= len;
604	}	842	}
605		843
606	errno = 0;	844	errno = 0;
607	}	845	}
		846
608	#endif	847	#endif
609		848
610	#if !HAVE_READDIR_R	849	#if !HAVE_READDIR_R
611	# define readdir_r aio_readdir_r	850	# define readdir_r aio_readdir_r
612		851
…		…
615	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	854	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
616	{	855	{
617	struct dirent *e;	856	struct dirent *e;
618	int errorno;	857	int errorno;
619		858
620	pthread_mutex_lock (&readdirlock);	859	LOCK (readdirlock);
621		860
622	e = readdir (dirp);	861	e = readdir (dirp);
623	errorno = errno;	862	errorno = errno;
624		863
625	if (e)	864	if (e)
…		…
628	strcpy (ent->d_name, e->d_name);	867	strcpy (ent->d_name, e->d_name);
629	}	868	}
630	else	869	else
631	*res = 0;	870	*res = 0;
632		871
633	pthread_mutex_unlock (&readdirlock);	872	UNLOCK (readdirlock);
634		873
635	errno = errorno;	874	errno = errorno;
636	return e ? 0 : -1;	875	return e ? 0 : -1;
637	}	876	}
638	#endif	877	#endif
639		878
640	/* sendfile always needs emulation */	879	/* sendfile always needs emulation */
641	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	880	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
642	{	881	{
643	ssize_t res;	882	ssize_t res;
644		883
645	if (!count)	884	if (!count)
646	return 0;	885	return 0;
…		…
657	{	896	{
658	off_t sbytes;	897	off_t sbytes;
659	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	898	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
660		899
661	if (res < 0 && sbytes)	900	if (res < 0 && sbytes)
662	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	901	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
663	res = sbytes;	902	res = sbytes;
664	}	903	}
665		904
666	# elif __hpux	905	# elif __hpux
667	res = sendfile (ofd, ifd, offset, count, 0, 0);	906	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
695	#endif	934	#endif
696	)	935	)
697	)	936	)
698	{	937	{
699	/* emulate sendfile. this is a major pain in the ass */	938	/* emulate sendfile. this is a major pain in the ass */
700	char buf[4096];	939	dBUF;
		940
701	res = 0;	941	res = 0;
702		942
703	while (count)	943	while (count)
704	{	944	{
705	ssize_t cnt;	945	ssize_t cnt;
706		946
707	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	947	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
708		948
709	if (cnt <= 0)	949	if (cnt <= 0)
710	{	950	{
711	if (cnt && !res) res = -1;	951	if (cnt && !res) res = -1;
712	break;	952	break;
713	}	953	}
714		954
715	cnt = write (ofd, buf, cnt);	955	cnt = write (ofd, aio_buf, cnt);
716		956
717	if (cnt <= 0)	957	if (cnt <= 0)
718	{	958	{
719	if (cnt && !res) res = -1;	959	if (cnt && !res) res = -1;
720	break;	960	break;
…		…
728		968
729	return res;	969	return res;
730	}	970	}
731		971
732	/* read a full directory */	972	/* read a full directory */
733	static int scandir_ (const char *path, void **namesp)	973	static void scandir_ (aio_req req, worker *self)
734	{	974	{
735	DIR *dirp = opendir (path);	975	DIR *dirp;
736	union	976	union
737	{	977	{
738	struct dirent d;	978	struct dirent d;
739	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	979	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
740	} u;	980	} *u;
741	struct dirent *entp;	981	struct dirent *entp;
742	char *name, *names;	982	char *name, *names;
743	int memlen = 4096;	983	int memlen = 4096;
744	int memofs = 0;	984	int memofs = 0;
745	int res = 0;	985	int res = 0;
746	int errorno;	986	int errorno;
747		987
748	if (!dirp)	988	LOCK (wrklock);
749	return -1;	989	self->dirp = dirp = opendir (req->dataptr);
750		990	self->dbuf = u = malloc (sizeof (*u));
751	names = malloc (memlen);	991	req->data2ptr = names = malloc (memlen);
		992	UNLOCK (wrklock);
		993
		994	if (dirp && u && names)
		995	for (;;)
		996	{
		997	errno = 0;
		998	readdir_r (dirp, &u->d, &entp);
		999
		1000	if (!entp)
		1001	break;
		1002
		1003	name = entp->d_name;
		1004
		1005	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1006	{
		1007	int len = strlen (name) + 1;
		1008
		1009	res++;
		1010
		1011	while (memofs + len > memlen)
		1012	{
		1013	memlen *= 2;
		1014	LOCK (wrklock);
		1015	req->data2ptr = names = realloc (names, memlen);
		1016	UNLOCK (wrklock);
		1017
		1018	if (!names)
		1019	break;
		1020	}
		1021
		1022	memcpy (names + memofs, name, len);
		1023	memofs += len;
		1024	}
		1025	}
		1026
		1027	if (errno)
		1028	res = -1;
		1029
		1030	req->result = res;
		1031	}
		1032
		1033	/*****************************************************************************/
		1034
		1035	static void *aio_proc (void *thr_arg)
		1036	{
		1037	aio_req req;
		1038	struct timespec ts;
		1039	worker *self = (worker *)thr_arg;
		1040
		1041	/* try to distribute timeouts somewhat evenly */
		1042	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1043	* (1000000000UL / 1024UL);
752		1044
753	for (;;)	1045	for (;;)
754	{	1046	{
755	errno = 0, readdir_r (dirp, &u.d, &entp);	1047	ts.tv_sec = time (0) + IDLE_TIMEOUT;
756		1048
757	if (!entp)	1049	LOCK (reqlock);
758	break;
759
760	name = entp->d_name;
761
762	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
763	{
764	int len = strlen (name) + 1;
765
766	res++;
767
768	while (memofs + len > memlen)
769	{
770	memlen *= 2;
771	names = realloc (names, memlen);
772	if (!names)
773	break;
774	}
775
776	memcpy (names + memofs, name, len);
777	memofs += len;
778	}
779	}
780
781	errorno = errno;
782	closedir (dirp);
783
784	if (errorno)
785	{
786	free (names);
787	errno = errorno;
788	res = -1;
789	}
790
791	*namesp = (void *)names;
792	return res;
793	}
794
795	/*****************************************************************************/
796
797	static void *aio_proc (void *thr_arg)
798	{
799	aio_req req;
800	int type;
801
802	do
803	{
804	pthread_mutex_lock (&reqlock);
805		1050
806	for (;;)	1051	for (;;)
807	{	1052	{
808	req = reqs;	1053	self->req = req = reqq_shift (&req_queue);
809
810	if (reqs)
811	{
812	reqs = reqs->next;
813	if (!reqs) reqe = 0;
814	}
815		1054
816	if (req)	1055	if (req)
817	break;	1056	break;
818		1057
		1058	++idle;
		1059
		1060	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
		1061	== ETIMEDOUT)
		1062	{
		1063	if (idle > max_idle)
		1064	{
		1065	--idle;
		1066	UNLOCK (reqlock);
		1067	LOCK (wrklock);
		1068	--started;
		1069	UNLOCK (wrklock);
		1070	goto quit;
		1071	}
		1072
		1073	/* we are allowed to idle, so do so without any timeout */
819	pthread_cond_wait (&reqwait, &reqlock);	1074	pthread_cond_wait (&reqwait, &reqlock);
		1075	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1076	}
		1077
		1078	--idle;
820	}	1079	}
821		1080
822	pthread_mutex_unlock (&reqlock);	1081	--nready;
		1082
		1083	UNLOCK (reqlock);
823		1084
824	errno = 0; /* strictly unnecessary */	1085	errno = 0; /* strictly unnecessary */
825	type = req->type; /* remember type for QUIT check */
826		1086
827	if (!(req->flags & FLAG_CANCELLED))	1087	if (!(req->flags & FLAG_CANCELLED))
828	switch (type)	1088	switch (req->type)
829	{	1089	{
830	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1090	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
831	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1091	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
832		1092
833	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1093	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
834	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1094	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
835		1095
836	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1096	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
837	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1097	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
838	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1098	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
839		1099
…		…
842	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1102	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
843	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1103	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
844	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1104	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
845	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1105	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
846	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1106	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1107	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
847		1108
848	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1109	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
849	case REQ_FSYNC: req->result = fsync (req->fd); break;	1110	case REQ_FSYNC: req->result = fsync (req->fd); break;
850	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1111	case REQ_READDIR: scandir_ (req, self); break;
851		1112
852	case REQ_SLEEP:	1113	case REQ_BUSY:
853	{	1114	{
854	struct timeval tv;	1115	struct timeval tv;
855		1116
856	tv.tv_sec = req->fd;	1117	tv.tv_sec = req->fd;
857	tv.tv_usec = req->fd2;	1118	tv.tv_usec = req->fd2;
…		…
859	req->result = select (0, 0, 0, 0, &tv);	1120	req->result = select (0, 0, 0, 0, &tv);
860	}	1121	}
861		1122
862	case REQ_GROUP:	1123	case REQ_GROUP:
863	case REQ_NOP:	1124	case REQ_NOP:
		1125	break;
		1126
864	case REQ_QUIT:	1127	case REQ_QUIT:
865	break;	1128	goto quit;
866		1129
867	default:	1130	default:
868	req->result = ENOSYS;	1131	req->result = ENOSYS;
869	break;	1132	break;
870	}	1133	}
871		1134
872	req->errorno = errno;	1135	req->errorno = errno;
873		1136
874	pthread_mutex_lock (&reslock);	1137	LOCK (reslock);
875		1138
876	req->next = 0;	1139	++npending;
877		1140
878	if (rese)	1141	if (!reqq_push (&res_queue, req))
879	{
880	rese->next = req;
881	rese = req;
882	}
883	else
884	{
885	rese = ress = req;
886
887	/* write a dummy byte to the pipe so fh becomes ready */	1142	/* write a dummy byte to the pipe so fh becomes ready */
888	write (respipe [1], &respipe, 1);	1143	write (respipe [1], &respipe, 1);
889	}
890		1144
891	pthread_mutex_unlock (&reslock);	1145	self->req = 0;
		1146	worker_clear (self);
		1147
		1148	UNLOCK (reslock);
892	}	1149	}
893	while (type != REQ_QUIT);	1150
		1151	quit:
		1152	LOCK (wrklock);
		1153	worker_free (self);
		1154	UNLOCK (wrklock);
894		1155
895	return 0;	1156	return 0;
896	}	1157	}
897		1158
898	/*****************************************************************************/	1159	/*****************************************************************************/
899		1160
900	static void atfork_prepare (void)	1161	static void atfork_prepare (void)
901	{	1162	{
902	pthread_mutex_lock (&reqlock);	1163	LOCK (wrklock);
903	pthread_mutex_lock (&reslock);	1164	LOCK (reqlock);
		1165	LOCK (reslock);
904	#if !HAVE_PREADWRITE	1166	#if !HAVE_PREADWRITE
905	pthread_mutex_lock (&preadwritelock);	1167	LOCK (preadwritelock);
906	#endif	1168	#endif
907	#if !HAVE_READDIR_R	1169	#if !HAVE_READDIR_R
908	pthread_mutex_lock (&readdirlock);	1170	LOCK (readdirlock);
909	#endif	1171	#endif
910	}	1172	}
911		1173
912	static void atfork_parent (void)	1174	static void atfork_parent (void)
913	{	1175	{
914	#if !HAVE_READDIR_R	1176	#if !HAVE_READDIR_R
915	pthread_mutex_unlock (&readdirlock);	1177	UNLOCK (readdirlock);
916	#endif	1178	#endif
917	#if !HAVE_PREADWRITE	1179	#if !HAVE_PREADWRITE
918	pthread_mutex_unlock (&preadwritelock);	1180	UNLOCK (preadwritelock);
919	#endif	1181	#endif
920	pthread_mutex_unlock (&reslock);	1182	UNLOCK (reslock);
921	pthread_mutex_unlock (&reqlock);	1183	UNLOCK (reqlock);
		1184	UNLOCK (wrklock);
922	}	1185	}
923		1186
924	static void atfork_child (void)	1187	static void atfork_child (void)
925	{	1188	{
926	aio_req prv;	1189	aio_req prv;
927		1190
		1191	while (prv = reqq_shift (&req_queue))
		1192	req_free (prv);
		1193
		1194	while (prv = reqq_shift (&res_queue))
		1195	req_free (prv);
		1196
		1197	while (wrk_first.next != &wrk_first)
		1198	{
		1199	worker *wrk = wrk_first.next;
		1200
		1201	if (wrk->req)
		1202	req_free (wrk->req);
		1203
		1204	worker_clear (wrk);
		1205	worker_free (wrk);
		1206	}
		1207
928	started = 0;	1208	started = 0;
929		1209	idle = 0;
930	while (reqs)	1210	nreqs = 0;
931	{	1211	nready = 0;
932	prv = reqs;	1212	npending = 0;
933	reqs = prv->next;
934	req_free (prv);
935	}
936
937	reqs = reqe = 0;
938
939	while (ress)
940	{
941	prv = ress;
942	ress = prv->next;
943	req_free (prv);
944	}
945
946	ress = rese = 0;
947		1213
948	close (respipe [0]);	1214	close (respipe [0]);
949	close (respipe [1]);	1215	close (respipe [1]);
950	create_pipe ();	1216	create_pipe ();
951		1217
…		…
978	PROTOTYPES: ENABLE	1244	PROTOTYPES: ENABLE
979		1245
980	BOOT:	1246	BOOT:
981	{	1247	{
982	HV *stash = gv_stashpv ("IO::AIO", 1);	1248	HV *stash = gv_stashpv ("IO::AIO", 1);
		1249
983	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1250	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
984	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1251	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
985	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1252	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1253	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1254	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1255	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
986		1256
987	create_pipe ();	1257	create_pipe ();
988	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1258	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
989	}	1259	}
990		1260
991	void	1261	void
992	min_parallel (nthreads)	1262	max_poll_reqs (int nreqs)
993	int nthreads
994	PROTOTYPE: $	1263	PROTOTYPE: $
		1264	CODE:
		1265	max_poll_reqs = nreqs;
995		1266
996	void	1267	void
997	max_parallel (nthreads)	1268	max_poll_time (double nseconds)
998	int nthreads
999	PROTOTYPE: $	1269	PROTOTYPE: $
		1270	CODE:
		1271	max_poll_time = nseconds * AIO_TICKS;
		1272
		1273	void
		1274	min_parallel (int nthreads)
		1275	PROTOTYPE: $
		1276
		1277	void
		1278	max_parallel (int nthreads)
		1279	PROTOTYPE: $
		1280
		1281	void
		1282	max_idle (int nthreads)
		1283	PROTOTYPE: $
		1284	CODE:
		1285	set_max_idle (nthreads);
1000		1286
1001	int	1287	int
1002	max_outstanding (nreqs)	1288	max_outstanding (int maxreqs)
1003	int nreqs	1289	PROTOTYPE: $
1004	PROTOTYPE: $
1005	CODE:	1290	CODE:
1006	RETVAL = max_outstanding;	1291	RETVAL = max_outstanding;
1007	max_outstanding = nreqs;	1292	max_outstanding = maxreqs;
		1293	OUTPUT:
		1294	RETVAL
1008		1295
1009	void	1296	void
1010	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1297	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1011	SV * pathname	1298	SV * pathname
1012	int flags	1299	int flags
…		…
1227		1514
1228	REQ_SEND;	1515	REQ_SEND;
1229	}	1516	}
1230		1517
1231	void	1518	void
		1519	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1520	SV * pathname
		1521	SV * callback
		1522	UV mode
		1523	UV dev
		1524	PPCODE:
		1525	{
		1526	dREQ;
		1527
		1528	req->type = REQ_MKNOD;
		1529	req->data = newSVsv (pathname);
		1530	req->dataptr = SvPVbyte_nolen (req->data);
		1531	req->mode = (mode_t)mode;
		1532	req->offset = dev;
		1533
		1534	REQ_SEND;
		1535	}
		1536
		1537	void
1232	aio_sleep (delay,callback=&PL_sv_undef)	1538	aio_busy (delay,callback=&PL_sv_undef)
1233	double delay	1539	double delay
1234	SV * callback	1540	SV * callback
1235	PPCODE:	1541	PPCODE:
1236	{	1542	{
1237	dREQ;	1543	dREQ;
1238		1544
1239	req->type = REQ_SLEEP;	1545	req->type = REQ_BUSY;
1240	req->fd = delay < 0. ? 0 : delay;	1546	req->fd = delay < 0. ? 0 : delay;
1241	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1547	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1242		1548
1243	REQ_SEND;	1549	REQ_SEND;
1244	}	1550	}
…		…
1267	req->type = REQ_NOP;	1573	req->type = REQ_NOP;
1268		1574
1269	REQ_SEND;	1575	REQ_SEND;
1270	}	1576	}
1271		1577
1272	#if 0	1578	int
1273		1579	aioreq_pri (int pri = 0)
1274	void	1580	PROTOTYPE: ;$
1275	aio_pri (int pri = DEFAULT_PRI)
1276	CODE:	1581	CODE:
		1582	RETVAL = next_pri - PRI_BIAS;
		1583	if (items > 0)
		1584	{
1277	if (pri < PRI_MIN) pri = PRI_MIN;	1585	if (pri < PRI_MIN) pri = PRI_MIN;
1278	if (pri > PRI_MAX) pri = PRI_MAX;	1586	if (pri > PRI_MAX) pri = PRI_MAX;
1279	next_pri = pri + PRI_BIAS;	1587	next_pri = pri + PRI_BIAS;
		1588	}
		1589	OUTPUT:
		1590	RETVAL
1280		1591
1281	#endif	1592	void
		1593	aioreq_nice (int nice = 0)
		1594	CODE:
		1595	nice = next_pri - nice;
		1596	if (nice < PRI_MIN) nice = PRI_MIN;
		1597	if (nice > PRI_MAX) nice = PRI_MAX;
		1598	next_pri = nice + PRI_BIAS;
1282		1599
1283	void	1600	void
1284	flush ()	1601	flush ()
1285	PROTOTYPE:	1602	PROTOTYPE:
1286	CODE:	1603	CODE:
1287	while (nreqs)	1604	while (nreqs)
1288	{	1605	{
1289	poll_wait ();	1606	poll_wait ();
1290	poll_cb ();	1607	poll_cb (0);
1291	}	1608	}
1292		1609
1293	void	1610	void
1294	poll()	1611	poll()
1295	PROTOTYPE:	1612	PROTOTYPE:
1296	CODE:	1613	CODE:
1297	if (nreqs)	1614	if (nreqs)
1298	{	1615	{
1299	poll_wait ();	1616	poll_wait ();
1300	poll_cb ();	1617	poll_cb (0);
1301	}	1618	}
1302		1619
1303	int	1620	int
1304	poll_fileno()	1621	poll_fileno()
1305	PROTOTYPE:	1622	PROTOTYPE:
…		…
1329	CODE:	1646	CODE:
1330	RETVAL = nreqs;	1647	RETVAL = nreqs;
1331	OUTPUT:	1648	OUTPUT:
1332	RETVAL	1649	RETVAL
1333		1650
		1651	int
		1652	nready()
		1653	PROTOTYPE:
		1654	CODE:
		1655	RETVAL = get_nready ();
		1656	OUTPUT:
		1657	RETVAL
		1658
		1659	int
		1660	npending()
		1661	PROTOTYPE:
		1662	CODE:
		1663	RETVAL = get_npending ();
		1664	OUTPUT:
		1665	RETVAL
		1666
		1667	int
		1668	nthreads()
		1669	PROTOTYPE:
		1670	CODE:
		1671	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1672	RETVAL = started;
		1673	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1674	OUTPUT:
		1675	RETVAL
		1676
1334	PROTOTYPES: DISABLE	1677	PROTOTYPES: DISABLE
1335		1678
1336	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1679	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1337		1680
1338	void	1681	void
1339	cancel (aio_req_ornot req)	1682	cancel (aio_req_ornot req)
1340	PROTOTYPE:
1341	CODE:	1683	CODE:
1342	req_cancel (req);	1684	req_cancel (req);
1343		1685
1344	void	1686	void
1345	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1687	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
…		…
1381	}	1723	}
1382	}	1724	}
1383	}	1725	}
1384		1726
1385	void	1727	void
		1728	cancel_subs (aio_req_ornot req)
		1729	CODE:
		1730	req_cancel_subs (req);
		1731
		1732	void
1386	result (aio_req grp, ...)	1733	result (aio_req grp, ...)
1387	CODE:	1734	CODE:
1388	{	1735	{
1389	int i;	1736	int i;
		1737	AV *av;
		1738
		1739	grp->errorno = errno;
		1740
1390	AV *av = newAV ();	1741	av = newAV ();
1391		1742
1392	for (i = 1; i < items; ++i )	1743	for (i = 1; i < items; ++i )
1393	av_push (av, newSVsv (ST (i)));	1744	av_push (av, newSVsv (ST (i)));
1394		1745
1395	SvREFCNT_dec (grp->data);	1746	SvREFCNT_dec (grp->data);
1396	grp->data = (SV *)av;	1747	grp->data = (SV *)av;
1397	}	1748	}
1398		1749
1399	void	1750	void
		1751	errno (aio_req grp, int errorno = errno)
		1752	CODE:
		1753	grp->errorno = errorno;
		1754
		1755	void
1400	feed_limit (aio_req grp, int limit)	1756	limit (aio_req grp, int limit)
1401	CODE:	1757	CODE:
1402	grp->fd2 = limit;	1758	grp->fd2 = limit;
1403	aio_grp_feed (grp);	1759	aio_grp_feed (grp);
1404		1760
1405	void	1761	void

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