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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.51 by root, Sun Oct 22 22:14:33 2006 UTC vs.
Revision 1.80 by root, Fri Oct 27 19:17:23 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,
…		…
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_READDIR,
59	REQ_LINK, REQ_SYMLINK,	98	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,	99	REQ_GROUP, REQ_NOP,
61	REQ_GROUP,	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
67	typedef struct aio_cb	106	typedef struct aio_cb
68	{	107	{
69	struct aio_cb *volatile next;	108	struct aio_cb *volatile next;
70
71	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72
73	SV *self; /* the perl counterpart of this request, if any */
74		109
75	SV *data, *callback;	110	SV *data, *callback;
76	SV *fh, *fh2;	111	SV *fh, *fh2;
77	void *dataptr, *data2ptr;	112	void *dataptr, *data2ptr;
78	Stat_t *statdata;	113	Stat_t *statdata;
79	off_t offset;	114	off_t offset;
80	size_t length;	115	size_t length;
81	ssize_t result;	116	ssize_t result;
82		117
		118	STRLEN dataoffset;
83	int type;	119	int type;
84	int fd, fd2;	120	int fd, fd2;
85	int errorno;	121	int errorno;
86	STRLEN dataoffset;
87	mode_t mode; /* open */	122	mode_t mode; /* open */
		123
88	unsigned char cancelled;	124	unsigned char flags;
		125	unsigned char pri;
		126
		127	SV *self; /* the perl counterpart of this request, if any */
		128	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
89	} aio_cb;	129	} aio_cb;
		130
		131	enum {
		132	FLAG_CANCELLED = 0x01,
		133	};
90		134
91	typedef aio_cb *aio_req;	135	typedef aio_cb *aio_req;
92	typedef aio_cb *aio_req_ornot;	136	typedef aio_cb *aio_req_ornot;
93		137
		138	enum {
		139	PRI_MIN = -4,
		140	PRI_MAX = 4,
		141
		142	DEFAULT_PRI = 0,
		143	PRI_BIAS = -PRI_MIN,
		144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		145	};
		146
		147	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		148
94	static int started, wanted;	149	static unsigned int started, wanted;
95	static volatile int nreqs;	150
96	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;
97	static int respipe [2];	202	static int respipe [2];
98		203
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		207
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	208	#if WORDREAD_UNSAFE
104	static volatile aio_req ress, rese; /* queue start, queue end */
105		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);
106	static void req_invoke (aio_req req);	294	static void req_invoke (aio_req req);
107	static void req_free (aio_req req);	295	static void req_free (aio_req req);
		296	static void req_cancel (aio_req req);
108		297
109	/* must be called at most once */	298	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	299	static SV *req_sv (aio_req req, const char *klass)
111	{	300	{
112	if (!req->self)	301	if (!req->self)
…		…
118	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	307	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
119	}	308	}
120		309
121	static aio_req SvAIO_REQ (SV *sv)	310	static aio_req SvAIO_REQ (SV *sv)
122	{	311	{
		312	MAGIC *mg;
		313
123	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	314	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
124	croak ("object of class " AIO_REQ_KLASS " expected");	315	croak ("object of class " AIO_REQ_KLASS " expected");
125		316
126	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	317	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
127		318
128	return mg ? (aio_req)mg->mg_ptr : 0;	319	return mg ? (aio_req)mg->mg_ptr : 0;
129	}	320	}
130		321
131	static void aio_grp_feed (aio_req grp)	322	static void aio_grp_feed (aio_req grp)
132	{	323	{
133	while (grp->length < grp->fd2)	324	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
134	{	325	{
135	int old_len = grp->length;	326	int old_len = grp->length;
136		327
137	if (grp->fh2 && SvOK (grp->fh2))	328	if (grp->fh2 && SvOK (grp->fh2))
138	{	329	{
…		…
141	ENTER;	332	ENTER;
142	SAVETMPS;	333	SAVETMPS;
143	PUSHMARK (SP);	334	PUSHMARK (SP);
144	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	335	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
145	PUTBACK;	336	PUTBACK;
146	call_sv (grp->fh2, G_VOID | G_EVAL);	337	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
147	SPAGAIN;	338	SPAGAIN;
148	FREETMPS;	339	FREETMPS;
149	LEAVE;	340	LEAVE;
150	}	341	}
151		342
…		…
172	req_invoke (grp);	363	req_invoke (grp);
173	req_free (grp);	364	req_free (grp);
174	}	365	}
175	}	366	}
176		367
177	static void poll_wait ()
178	{
179	if (nreqs && !ress)
180	{
181	fd_set rfd;
182	FD_ZERO(&rfd);
183	FD_SET(respipe [0], &rfd);
184
185	select (respipe [0] + 1, &rfd, 0, 0, 0);
186	}
187	}
188
189	static void req_invoke (aio_req req)	368	static void req_invoke (aio_req req)
190	{	369	{
191	dSP;	370	dSP;
192	int errorno = errno;
193		371
194	if (req->cancelled || !SvOK (req->callback))	372	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
195	return;	373	{
196
197	errno = req->errorno;
198
199	ENTER;	374	ENTER;
200	SAVETMPS;	375	SAVETMPS;
201	PUSHMARK (SP);	376	PUSHMARK (SP);
202	EXTEND (SP, 1);	377	EXTEND (SP, 1);
203		378
204	switch (req->type)	379	switch (req->type)
205	{
206	case REQ_READDIR:
207	{	380	{
208	SV *rv = &PL_sv_undef;	381	case REQ_READDIR:
209
210	if (req->result >= 0)
211	{	382	{
212	char *buf = req->data2ptr;	383	SV *rv = &PL_sv_undef;
213	AV *av = newAV ();
214		384
215	while (req->result)	385	if (req->result >= 0)
216	{	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	{
217	SV *sv = newSVpv (buf, 0);	395	SV *sv = newSVpv (buf, 0);
218		396
219	av_push (av, sv);	397	av_store (av, i, sv);
220	buf += SvCUR (sv) + 1;	398	buf += SvCUR (sv) + 1;
221	req->result--;	399	}
		400
		401	rv = sv_2mortal (newRV_noinc ((SV *)av));
222	}	402	}
223		403
224	rv = sv_2mortal (newRV_noinc ((SV *)av));	404	PUSHs (rv);
225	}	405	}
		406	break;
226		407
227	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;
228	}	446	}
229	break;
230		447
231	case REQ_OPEN:	448	errno = req->errorno;
232	{
233	/* convert fd to fh */
234	SV *fh;
235		449
236	PUSHs (sv_2mortal (newSViv (req->result)));
237	PUTBACK;	450	PUTBACK;
238	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
239	SPAGAIN;
240
241	fh = SvREFCNT_inc (POPs);
242
243	PUSHMARK (SP);
244	XPUSHs (sv_2mortal (fh));
245	}
246	break;
247
248	case REQ_GROUP:
249	req->fd = 2; /* mark group as finished */
250
251	if (req->data)
252	{
253	int i;
254	AV *av = (AV *)req->data;
255
256	EXTEND (SP, AvFILL (av) + 1);
257	for (i = 0; i <= AvFILL (av); ++i)
258	PUSHs (*av_fetch (av, i, 0));
259	}
260	break;
261
262	case REQ_SLEEP:
263	break;
264
265	default:
266	PUSHs (sv_2mortal (newSViv (req->result)));
267	break;
268	}
269
270
271	PUTBACK;
272	call_sv (req->callback, G_VOID | G_EVAL);	451	call_sv (req->callback, G_VOID | G_EVAL);
273	SPAGAIN;	452	SPAGAIN;
274		453
275	FREETMPS;	454	FREETMPS;
276	LEAVE;	455	LEAVE;
277
278	errno = errorno;
279
280	if (SvTRUE (ERRSV))
281	{	456	}
282	req_free (req);
283	croak (0);
284	}
285	}
286		457
287	static void req_free (aio_req req)
288	{
289	if (req->grp)	458	if (req->grp)
290	{	459	{
291	aio_req grp = req->grp;	460	aio_req grp = req->grp;
292		461
293	/* unlink request */	462	/* unlink request */
…		…
298	grp->grp_first = req->grp_next;	467	grp->grp_first = req->grp_next;
299		468
300	aio_grp_dec (grp);	469	aio_grp_dec (grp);
301	}	470	}
302		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	{
303	if (req->self)	481	if (req->self)
304	{	482	{
305	sv_unmagic (req->self, PERL_MAGIC_ext);	483	sv_unmagic (req->self, PERL_MAGIC_ext);
306	SvREFCNT_dec (req->self);	484	SvREFCNT_dec (req->self);
307	}	485	}
…		…
310	SvREFCNT_dec (req->fh);	488	SvREFCNT_dec (req->fh);
311	SvREFCNT_dec (req->fh2);	489	SvREFCNT_dec (req->fh2);
312	SvREFCNT_dec (req->callback);	490	SvREFCNT_dec (req->callback);
313	Safefree (req->statdata);	491	Safefree (req->statdata);
314		492
315	if (req->type == REQ_READDIR && req->result >= 0)	493	if (req->type == REQ_READDIR)
316	free (req->data2ptr);	494	free (req->data2ptr);
317		495
318	Safefree (req);	496	Safefree (req);
319	}	497	}
320		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
321	static void req_cancel (aio_req req)	513	static void req_cancel (aio_req req)
322	{	514	{
323	req->cancelled = 1;	515	req->flags |= FLAG_CANCELLED;
324		516
325	if (req->type == REQ_GROUP)	517	req_cancel_subs (req);
326	{	518	}
327	aio_req sub;
328		519
329	for (sub = req->grp_first; sub; sub = sub->grp_next)	520	static void *aio_proc(void *arg);
330	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)
331	}	545	{
332	}	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);
333		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
334	static int poll_cb ()	660	static int poll_cb (int max)
335	{	661	{
336	dSP;	662	dSP;
337	int count = 0;	663	int count = 0;
338	int do_croak = 0;	664	int do_croak = 0;
339	aio_req req;	665	aio_req req;
340		666
341	for (;;)	667	for (;;)
342	{	668	{
343	pthread_mutex_lock (&reslock);	669	while (max <= 0 || count < max)
344	req = ress;
345
346	if (req)
347	{	670	{
348	ress = req->next;	671	maybe_start_thread ();
349		672
		673	LOCK (reslock);
		674	req = reqq_shift (&res_queue);
		675
350	if (!ress)	676	if (req)
351	{	677	{
		678	--npending;
		679
		680	if (!res_queue.size)
		681	{
352	/* read any signals sent by the worker threads */	682	/* read any signals sent by the worker threads */
353	char buf [32];	683	char buf [32];
354	while (read (respipe [0], buf, 32) == 32)	684	while (read (respipe [0], buf, 32) == 32)
		685	;
355	;	686	}
356
357	rese = 0;
358	}	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);
359	}	722	}
360		723
361	pthread_mutex_unlock (&reslock);	724	if (nreqs <= max_outstanding)
362
363	if (!req)
364	break;	725	break;
365		726
366	--nreqs;	727	poll_wait ();
367		728
368	if (req->type == REQ_QUIT)	729	max = 0;
369	started--;
370	else if (req->type == REQ_GROUP && req->length)
371	{
372	req->fd = 1; /* mark request as delayed */
373	continue;
374	}
375	else
376	{
377	if (req->type == REQ_READ)
378	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
379
380	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
381	SvREADONLY_off (req->data);
382
383	if (req->statdata)
384	{
385	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
386	PL_laststatval = req->result;
387	PL_statcache = *(req->statdata);
388	}
389
390	req_invoke (req);
391
392	count++;
393	}
394
395	req_free (req);
396	}	730	}
397		731
398	return count;	732	return count;
399	}
400
401	static void *aio_proc(void *arg);
402
403	static void start_thread (void)
404	{
405	sigset_t fullsigset, oldsigset;
406	pthread_t tid;
407	pthread_attr_t attr;
408
409	pthread_attr_init (&attr);
410	pthread_attr_setstacksize (&attr, STACKSIZE);
411	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
412
413	sigfillset (&fullsigset);
414	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
415
416	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
417	started++;
418
419	sigprocmask (SIG_SETMASK, &oldsigset, 0);
420	}
421
422	static void req_send (aio_req req)
423	{
424	while (started < wanted && nreqs >= started)
425	start_thread ();
426
427	++nreqs;
428
429	pthread_mutex_lock (&reqlock);
430
431	req->next = 0;
432
433	if (reqe)
434	{
435	reqe->next = req;
436	reqe = req;
437	}
438	else
439	reqe = reqs = req;
440
441	pthread_cond_signal (&reqwait);
442	pthread_mutex_unlock (&reqlock);
443
444	if (nreqs > max_outstanding)
445	for (;;)
446	{
447	poll_cb ();
448
449	if (nreqs <= max_outstanding)
450	break;
451
452	poll_wait ();
453	}
454	}
455
456	static void end_thread (void)
457	{
458	aio_req req;
459	Newz (0, req, 1, aio_cb);
460	req->type = REQ_QUIT;
461
462	req_send (req);
463	}
464
465	static void min_parallel (int nthreads)
466	{
467	if (wanted < nthreads)
468	wanted = nthreads;
469	}
470
471	static void max_parallel (int nthreads)
472	{
473	int cur = started;
474
475	if (wanted > nthreads)
476	wanted = nthreads;
477
478	while (cur > wanted)
479	{
480	end_thread ();
481	cur--;
482	}
483
484	while (started > wanted)
485	{
486	poll_wait ();
487	poll_cb ();
488	}
489	}	733	}
490		734
491	static void create_pipe ()	735	static void create_pipe ()
492	{	736	{
493	if (pipe (respipe))	737	if (pipe (respipe))
…		…
517	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)
518	{	762	{
519	ssize_t res;	763	ssize_t res;
520	off_t ooffset;	764	off_t ooffset;
521		765
522	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
523	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
524	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
525	res = read (fd, buf, count);	769	res = read (fd, buf, count);
526	lseek (fd, ooffset, SEEK_SET);	770	lseek (fd, ooffset, SEEK_SET);
527	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
528		772
529	return res;	773	return res;
530	}	774	}
531		775
532	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)
533	{	777	{
534	ssize_t res;	778	ssize_t res;
535	off_t ooffset;	779	off_t ooffset;
536		780
537	pthread_mutex_lock (&preadwritelock);	781	LOCK (preadwritelock);
538	ooffset = lseek (fd, 0, SEEK_CUR);	782	ooffset = lseek (fd, 0, SEEK_CUR);
539	lseek (fd, offset, SEEK_SET);	783	lseek (fd, offset, SEEK_SET);
540	res = write (fd, buf, count);	784	res = write (fd, buf, count);
541	lseek (fd, offset, SEEK_SET);	785	lseek (fd, offset, SEEK_SET);
542	pthread_mutex_unlock (&preadwritelock);	786	UNLOCK (preadwritelock);
543		787
544	return res;	788	return res;
545	}	789	}
546	#endif	790	#endif
547		791
548	#if !HAVE_FDATASYNC	792	#if !HAVE_FDATASYNC
549	# define fdatasync fsync	793	# define fdatasync fsync
550	#endif	794	#endif
551		795
552	#if !HAVE_READAHEAD	796	#if !HAVE_READAHEAD
553	# define readahead aio_readahead	797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
554		798
555	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)
556	{	800	{
557	char readahead_buf[4096];	801	dBUF;
558		802
559	while (count > 0)	803	while (count > 0)
560	{	804	{
561	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
562		806
563	pread (fd, readahead_buf, len, offset);	807	pread (fd, aio_buf, len, offset);
564	offset += len;	808	offset += len;
565	count -= len;	809	count -= len;
566	}	810	}
567		811
568	errno = 0;	812	errno = 0;
569	}	813	}
		814
570	#endif	815	#endif
571		816
572	#if !HAVE_READDIR_R	817	#if !HAVE_READDIR_R
573	# define readdir_r aio_readdir_r	818	# define readdir_r aio_readdir_r
574		819
…		…
577	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)
578	{	823	{
579	struct dirent *e;	824	struct dirent *e;
580	int errorno;	825	int errorno;
581		826
582	pthread_mutex_lock (&readdirlock);	827	LOCK (readdirlock);
583		828
584	e = readdir (dirp);	829	e = readdir (dirp);
585	errorno = errno;	830	errorno = errno;
586		831
587	if (e)	832	if (e)
…		…
590	strcpy (ent->d_name, e->d_name);	835	strcpy (ent->d_name, e->d_name);
591	}	836	}
592	else	837	else
593	*res = 0;	838	*res = 0;
594		839
595	pthread_mutex_unlock (&readdirlock);	840	UNLOCK (readdirlock);
596		841
597	errno = errorno;	842	errno = errorno;
598	return e ? 0 : -1;	843	return e ? 0 : -1;
599	}	844	}
600	#endif	845	#endif
601		846
602	/* sendfile always needs emulation */	847	/* sendfile always needs emulation */
603	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)
604	{	849	{
605	ssize_t res;	850	ssize_t res;
606		851
607	if (!count)	852	if (!count)
608	return 0;	853	return 0;
…		…
619	{	864	{
620	off_t sbytes;	865	off_t sbytes;
621	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
622		867
623	if (res < 0 && sbytes)	868	if (res < 0 && sbytes)
624	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
625	res = sbytes;	870	res = sbytes;
626	}	871	}
627		872
628	# elif __hpux	873	# elif __hpux
629	res = sendfile (ofd, ifd, offset, count, 0, 0);	874	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
657	#endif	902	#endif
658	)	903	)
659	)	904	)
660	{	905	{
661	/* emulate sendfile. this is a major pain in the ass */	906	/* emulate sendfile. this is a major pain in the ass */
662	char buf[4096];	907	dBUF;
		908
663	res = 0;	909	res = 0;
664		910
665	while (count)	911	while (count)
666	{	912	{
667	ssize_t cnt;	913	ssize_t cnt;
668		914
669	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
670		916
671	if (cnt <= 0)	917	if (cnt <= 0)
672	{	918	{
673	if (cnt && !res) res = -1;	919	if (cnt && !res) res = -1;
674	break;	920	break;
675	}	921	}
676		922
677	cnt = write (ofd, buf, cnt);	923	cnt = write (ofd, aio_buf, cnt);
678		924
679	if (cnt <= 0)	925	if (cnt <= 0)
680	{	926	{
681	if (cnt && !res) res = -1;	927	if (cnt && !res) res = -1;
682	break;	928	break;
…		…
690		936
691	return res;	937	return res;
692	}	938	}
693		939
694	/* read a full directory */	940	/* read a full directory */
695	static int scandir_ (const char *path, void **namesp)	941	static void scandir_ (aio_req req, worker *self)
696	{	942	{
697	DIR *dirp = opendir (path);	943	DIR *dirp;
698	union	944	union
699	{	945	{
700	struct dirent d;	946	struct dirent d;
701	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	947	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
702	} u;	948	} *u;
703	struct dirent *entp;	949	struct dirent *entp;
704	char *name, *names;	950	char *name, *names;
705	int memlen = 4096;	951	int memlen = 4096;
706	int memofs = 0;	952	int memofs = 0;
707	int res = 0;	953	int res = 0;
708	int errorno;	954	int errorno;
709		955
710	if (!dirp)	956	LOCK (wrklock);
711	return -1;	957	self->dirp = dirp = opendir (req->dataptr);
712		958	self->dbuf = u = malloc (sizeof (*u));
713	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;
714		1007
715	for (;;)	1008	for (;;)
716	{	1009	{
717	errno = 0, readdir_r (dirp, &u.d, &entp);	1010	LOCK (reqlock);
718
719	if (!entp)
720	break;
721
722	name = entp->d_name;
723
724	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
725	{
726	int len = strlen (name) + 1;
727
728	res++;
729
730	while (memofs + len > memlen)
731	{
732	memlen *= 2;
733	names = realloc (names, memlen);
734	if (!names)
735	break;
736	}
737
738	memcpy (names + memofs, name, len);
739	memofs += len;
740	}
741	}
742
743	errorno = errno;
744	closedir (dirp);
745
746	if (errorno)
747	{
748	free (names);
749	errno = errorno;
750	res = -1;
751	}
752
753	*namesp = (void *)names;
754	return res;
755	}
756
757	/*****************************************************************************/
758
759	static void *aio_proc (void *thr_arg)
760	{
761	aio_req req;
762	int type;
763
764	do
765	{
766	pthread_mutex_lock (&reqlock);
767		1011
768	for (;;)	1012	for (;;)
769	{	1013	{
770	req = reqs;	1014	self->req = req = reqq_shift (&req_queue);
771
772	if (reqs)
773	{
774	reqs = reqs->next;
775	if (!reqs) reqe = 0;
776	}
777		1015
778	if (req)	1016	if (req)
779	break;	1017	break;
780		1018
781	pthread_cond_wait (&reqwait, &reqlock);	1019	pthread_cond_wait (&reqwait, &reqlock);
782	}	1020	}
783		1021
784	pthread_mutex_unlock (&reqlock);	1022	--nready;
		1023
		1024	UNLOCK (reqlock);
785		1025
786	errno = 0; /* strictly unnecessary */	1026	errno = 0; /* strictly unnecessary */
787		1027
788	if (!req->cancelled)	1028	if (!(req->flags & FLAG_CANCELLED))
789	switch (type = req->type) /* remember type for QUIT check */	1029	switch (req->type)
790	{	1030	{
791	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;
792	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;
793		1033
794	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;
795	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;
796		1036
797	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
798	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
799	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
800		1040
…		…
806	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1046	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
807	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1047	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
808		1048
809	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1049	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
810	case REQ_FSYNC: req->result = fsync (req->fd); break;	1050	case REQ_FSYNC: req->result = fsync (req->fd); break;
811	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1051	case REQ_READDIR: scandir_ (req, self); break;
812		1052
813	case REQ_SLEEP:	1053	case REQ_BUSY:
814	{	1054	{
815	struct timeval tv;	1055	struct timeval tv;
816		1056
817	tv.tv_sec = req->fd;	1057	tv.tv_sec = req->fd;
818	tv.tv_usec = req->fd2;	1058	tv.tv_usec = req->fd2;
819		1059
820	req->result = select (0, 0, 0, 0, &tv);	1060	req->result = select (0, 0, 0, 0, &tv);
821	}	1061	}
822		1062
		1063	case REQ_GROUP:
		1064	case REQ_NOP:
		1065	break;
		1066
823	case REQ_QUIT:	1067	case REQ_QUIT:
		1068	LOCK (wrklock);
		1069	worker_free (self);
		1070	--started;
		1071	UNLOCK (wrklock);
824	break;	1072	return 0;
825		1073
826	default:	1074	default:
827	req->result = ENOSYS;	1075	req->result = ENOSYS;
828	break;	1076	break;
829	}	1077	}
830		1078
831	req->errorno = errno;	1079	req->errorno = errno;
832		1080
833	pthread_mutex_lock (&reslock);	1081	LOCK (reslock);
834		1082
835	req->next = 0;	1083	++npending;
836		1084
837	printf ("queue rese %p\n", rese);//D	1085	if (!reqq_push (&res_queue, req))
838	if (rese)
839	{
840	rese->next = req;
841	rese = req;
842	}
843	else
844	{
845	rese = ress = req;
846
847	/* write a dummy byte to the pipe so fh becomes ready */	1086	/* write a dummy byte to the pipe so fh becomes ready */
848	write (respipe [1], &respipe, 1);	1087	write (respipe [1], &respipe, 1);
849	}
850		1088
851	pthread_mutex_unlock (&reslock);	1089	self->req = 0;
852	}	1090	worker_clear (self);
853	while (type != REQ_QUIT);
854		1091
855	return 0;	1092	UNLOCK (reslock);
		1093	}
856	}	1094	}
857		1095
858	/*****************************************************************************/	1096	/*****************************************************************************/
859		1097
860	static void atfork_prepare (void)	1098	static void atfork_prepare (void)
861	{	1099	{
862	pthread_mutex_lock (&reqlock);	1100	LOCK (wrklock);
863	pthread_mutex_lock (&reslock);	1101	LOCK (reqlock);
		1102	LOCK (reslock);
864	#if !HAVE_PREADWRITE	1103	#if !HAVE_PREADWRITE
865	pthread_mutex_lock (&preadwritelock);	1104	LOCK (preadwritelock);
866	#endif	1105	#endif
867	#if !HAVE_READDIR_R	1106	#if !HAVE_READDIR_R
868	pthread_mutex_lock (&readdirlock);	1107	LOCK (readdirlock);
869	#endif	1108	#endif
870	}	1109	}
871		1110
872	static void atfork_parent (void)	1111	static void atfork_parent (void)
873	{	1112	{
874	#if !HAVE_READDIR_R	1113	#if !HAVE_READDIR_R
875	pthread_mutex_unlock (&readdirlock);	1114	UNLOCK (readdirlock);
876	#endif	1115	#endif
877	#if !HAVE_PREADWRITE	1116	#if !HAVE_PREADWRITE
878	pthread_mutex_unlock (&preadwritelock);	1117	UNLOCK (preadwritelock);
879	#endif	1118	#endif
880	pthread_mutex_unlock (&reslock);	1119	UNLOCK (reslock);
881	pthread_mutex_unlock (&reqlock);	1120	UNLOCK (reqlock);
		1121	UNLOCK (wrklock);
882	}	1122	}
883		1123
884	static void atfork_child (void)	1124	static void atfork_child (void)
885	{	1125	{
886	aio_req prv;	1126	aio_req prv;
887		1127
		1128	while (prv = reqq_shift (&req_queue))
		1129	req_free (prv);
		1130
		1131	while (prv = reqq_shift (&res_queue))
		1132	req_free (prv);
		1133
		1134	while (wrk_first.next != &wrk_first)
		1135	{
		1136	worker *wrk = wrk_first.next;
		1137
		1138	if (wrk->req)
		1139	req_free (wrk->req);
		1140
		1141	worker_clear (wrk);
		1142	worker_free (wrk);
		1143	}
		1144
888	started = 0;	1145	started = 0;
889		1146	nreqs = 0;
890	while (reqs)
891	{
892	prv = reqs;
893	reqs = prv->next;
894	req_free (prv);
895	}
896
897	reqs = reqe = 0;
898
899	while (ress)
900	{
901	prv = ress;
902	ress = prv->next;
903	req_free (prv);
904	}
905
906	ress = rese = 0;
907		1147
908	close (respipe [0]);	1148	close (respipe [0]);
909	close (respipe [1]);	1149	close (respipe [1]);
910	create_pipe ();	1150	create_pipe ();
911		1151
912	atfork_parent ();	1152	atfork_parent ();
913	}	1153	}
914		1154
915	#define dREQ \	1155	#define dREQ \
916	aio_req req; \	1156	aio_req req; \
		1157	int req_pri = next_pri; \
		1158	next_pri = DEFAULT_PRI + PRI_BIAS; \
917	\	1159	\
918	if (SvOK (callback) && !SvROK (callback)) \	1160	if (SvOK (callback) && !SvROK (callback)) \
919	croak ("callback must be undef or of reference type"); \	1161	croak ("callback must be undef or of reference type"); \
920	\	1162	\
921	Newz (0, req, 1, aio_cb); \	1163	Newz (0, req, 1, aio_cb); \
922	if (!req) \	1164	if (!req) \
923	croak ("out of memory during aio_req allocation"); \	1165	croak ("out of memory during aio_req allocation"); \
924	\	1166	\
925	req->callback = newSVsv (callback)	1167	req->callback = newSVsv (callback); \
		1168	req->pri = req_pri
926		1169
927	#define REQ_SEND \	1170	#define REQ_SEND \
928	req_send (req); \	1171	req_send (req); \
929	\	1172	\
930	if (GIMME_V != G_VOID) \	1173	if (GIMME_V != G_VOID) \
…		…
941	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1184	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
942	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1185	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
943		1186
944	create_pipe ();	1187	create_pipe ();
945	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1188	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
946	}
947		1189
		1190	start_thread ();
		1191	}
		1192
948	void	1193	void
949	min_parallel (nthreads)	1194	min_parallel (int nthreads)
950	int nthreads
951	PROTOTYPE: $	1195	PROTOTYPE: $
952		1196
953	void	1197	void
954	max_parallel (nthreads)	1198	max_parallel (int nthreads)
955	int nthreads
956	PROTOTYPE: $	1199	PROTOTYPE: $
957		1200
958	int	1201	int
959	max_outstanding (nreqs)	1202	max_outstanding (int maxreqs)
960	int nreqs	1203	PROTOTYPE: $
961	PROTOTYPE: $
962	CODE:	1204	CODE:
963	RETVAL = max_outstanding;	1205	RETVAL = max_outstanding;
964	max_outstanding = nreqs;	1206	max_outstanding = maxreqs;
		1207	OUTPUT:
		1208	RETVAL
965		1209
966	void	1210	void
967	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1211	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
968	SV * pathname	1212	SV * pathname
969	int flags	1213	int flags
…		…
1184		1428
1185	REQ_SEND;	1429	REQ_SEND;
1186	}	1430	}
1187		1431
1188	void	1432	void
1189	aio_sleep (delay,callback=&PL_sv_undef)	1433	aio_busy (delay,callback=&PL_sv_undef)
1190	double delay	1434	double delay
1191	SV * callback	1435	SV * callback
1192	PPCODE:	1436	PPCODE:
1193	{	1437	{
1194	dREQ;	1438	dREQ;
1195		1439
1196	req->type = REQ_SLEEP;	1440	req->type = REQ_BUSY;
1197	req->fd = delay < 0. ? 0 : delay;	1441	req->fd = delay < 0. ? 0 : delay;
1198	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1442	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1199		1443
1200	REQ_SEND;	1444	REQ_SEND;
1201	}	1445	}
…		…
1205	SV * callback	1449	SV * callback
1206	PROTOTYPE: ;$	1450	PROTOTYPE: ;$
1207	PPCODE:	1451	PPCODE:
1208	{	1452	{
1209	dREQ;	1453	dREQ;
		1454
1210	req->type = REQ_GROUP;	1455	req->type = REQ_GROUP;
1211	req_send (req);	1456	req_send (req);
		1457
1212	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1458	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1213	}	1459	}
		1460
		1461	void
		1462	aio_nop (callback=&PL_sv_undef)
		1463	SV * callback
		1464	PPCODE:
		1465	{
		1466	dREQ;
		1467
		1468	req->type = REQ_NOP;
		1469
		1470	REQ_SEND;
		1471	}
		1472
		1473	int
		1474	aioreq_pri (int pri = 0)
		1475	PROTOTYPE: ;$
		1476	CODE:
		1477	RETVAL = next_pri - PRI_BIAS;
		1478	if (items > 0)
		1479	{
		1480	if (pri < PRI_MIN) pri = PRI_MIN;
		1481	if (pri > PRI_MAX) pri = PRI_MAX;
		1482	next_pri = pri + PRI_BIAS;
		1483	}
		1484	OUTPUT:
		1485	RETVAL
		1486
		1487	void
		1488	aioreq_nice (int nice = 0)
		1489	CODE:
		1490	nice = next_pri - nice;
		1491	if (nice < PRI_MIN) nice = PRI_MIN;
		1492	if (nice > PRI_MAX) nice = PRI_MAX;
		1493	next_pri = nice + PRI_BIAS;
1214		1494
1215	void	1495	void
1216	flush ()	1496	flush ()
1217	PROTOTYPE:	1497	PROTOTYPE:
1218	CODE:	1498	CODE:
1219	while (nreqs)	1499	while (nreqs)
1220	{	1500	{
1221	poll_wait ();	1501	poll_wait ();
1222	poll_cb ();	1502	poll_cb (0);
1223	}	1503	}
1224		1504
1225	void	1505	void
1226	poll()	1506	poll()
1227	PROTOTYPE:	1507	PROTOTYPE:
1228	CODE:	1508	CODE:
1229	if (nreqs)	1509	if (nreqs)
1230	{	1510	{
1231	poll_wait ();	1511	poll_wait ();
1232	poll_cb ();	1512	poll_cb (0);
1233	}	1513	}
1234		1514
1235	int	1515	int
1236	poll_fileno()	1516	poll_fileno()
1237	PROTOTYPE:	1517	PROTOTYPE:
…		…
1242		1522
1243	int	1523	int
1244	poll_cb(...)	1524	poll_cb(...)
1245	PROTOTYPE:	1525	PROTOTYPE:
1246	CODE:	1526	CODE:
1247	RETVAL = poll_cb ();	1527	RETVAL = poll_cb (0);
		1528	OUTPUT:
		1529	RETVAL
		1530
		1531	int
		1532	poll_some(int max = 0)
		1533	PROTOTYPE: $
		1534	CODE:
		1535	RETVAL = poll_cb (max);
1248	OUTPUT:	1536	OUTPUT:
1249	RETVAL	1537	RETVAL
1250		1538
1251	void	1539	void
1252	poll_wait()	1540	poll_wait()
…		…
1261	CODE:	1549	CODE:
1262	RETVAL = nreqs;	1550	RETVAL = nreqs;
1263	OUTPUT:	1551	OUTPUT:
1264	RETVAL	1552	RETVAL
1265		1553
1266	PROTOTYPES: DISABLE	1554	int
1267		1555	nready()
1268	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1269
1270	void
1271	cancel (aio_req_ornot req)
1272	PROTOTYPE:	1556	PROTOTYPE:
1273	CODE:	1557	CODE:
		1558	RETVAL = get_nready ();
		1559	OUTPUT:
		1560	RETVAL
		1561
		1562	int
		1563	npending()
		1564	PROTOTYPE:
		1565	CODE:
		1566	RETVAL = get_npending ();
		1567	OUTPUT:
		1568	RETVAL
		1569
		1570	PROTOTYPES: DISABLE
		1571
		1572	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1573
		1574	void
		1575	cancel (aio_req_ornot req)
		1576	CODE:
1274	req_cancel (req);	1577	req_cancel (req);
		1578
		1579	void
		1580	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1581	CODE:
		1582	SvREFCNT_dec (req->callback);
		1583	req->callback = newSVsv (callback);
1275		1584
1276	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1585	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1277		1586
1278	void	1587	void
1279	add (aio_req grp, ...)	1588	add (aio_req grp, ...)
1280	PPCODE:	1589	PPCODE:
1281	{	1590	{
1282	int i;	1591	int i;
		1592	aio_req req;
1283		1593
1284	if (grp->fd == 2)	1594	if (grp->fd == 2)
1285	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1595	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1286		1596
1287	for (i = 1; i < items; ++i )	1597	for (i = 1; i < items; ++i )
1288	{	1598	{
1289	if (GIMME_V != G_VOID)	1599	if (GIMME_V != G_VOID)
1290	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1600	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1291		1601
1292	aio_req req = SvAIO_REQ (ST (i));	1602	req = SvAIO_REQ (ST (i));
1293		1603
1294	if (req)	1604	if (req)
1295	{	1605	{
1296	++grp->length;	1606	++grp->length;
1297	req->grp = grp;	1607	req->grp = grp;
…		…
1306	}	1616	}
1307	}	1617	}
1308	}	1618	}
1309		1619
1310	void	1620	void
		1621	cancel_subs (aio_req_ornot req)
		1622	CODE:
		1623	req_cancel_subs (req);
		1624
		1625	void
1311	result (aio_req grp, ...)	1626	result (aio_req grp, ...)
1312	CODE:	1627	CODE:
1313	{	1628	{
1314	int i;	1629	int i;
		1630	AV *av;
		1631
		1632	grp->errorno = errno;
		1633
1315	AV *av = newAV ();	1634	av = newAV ();
1316		1635
1317	for (i = 1; i < items; ++i )	1636	for (i = 1; i < items; ++i )
1318	av_push (av, newSVsv (ST (i)));	1637	av_push (av, newSVsv (ST (i)));
1319		1638
1320	SvREFCNT_dec (grp->data);	1639	SvREFCNT_dec (grp->data);
1321	grp->data = (SV *)av;	1640	grp->data = (SV *)av;
1322	}	1641	}
1323		1642
1324	void	1643	void
1325	lock (aio_req grp)	1644	errno (aio_req grp, int errorno = errno)
1326	CODE:	1645	CODE:
1327	++grp->length;	1646	grp->errorno = errorno;
1328		1647
1329	void	1648	void
1330	unlock (aio_req grp)
1331	CODE:
1332	aio_grp_dec (grp);
1333
1334	void
1335	feeder_limit (aio_req grp, int limit)	1649	limit (aio_req grp, int limit)
1336	CODE:	1650	CODE:
1337	grp->fd2 = limit;	1651	grp->fd2 = limit;
1338	aio_grp_feed (grp);	1652	aio_grp_feed (grp);
1339		1653
1340	void	1654	void
1341	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)	1655	feed (aio_req grp, SV *callback=&PL_sv_undef)
1342	CODE:	1656	CODE:
1343	{	1657	{
1344	SvREFCNT_dec (grp->fh2);	1658	SvREFCNT_dec (grp->fh2);
1345	grp->fh2 = newSVsv (callback);	1659	grp->fh2 = newSVsv (callback);
1346		1660

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