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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.59 by root, Mon Oct 23 18:56:27 2006 UTC vs.
Revision 1.82 by root, Fri Oct 27 20:11:58 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
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
		124	unsigned char flags;
88	unsigned char pri;	125	unsigned char pri;
89	unsigned char flags;	126
		127	SV *self; /* the perl counterpart of this request, if any */
		128	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
90	} aio_cb;	129	} aio_cb;
91		130
92	enum {	131	enum {
93	FLAG_CANCELLED = 0x01,	132	FLAG_CANCELLED = 0x01,
94	};	133	};
95		134
96	typedef aio_cb *aio_req;	135	typedef aio_cb *aio_req;
97	typedef aio_cb *aio_req_ornot;	136	typedef aio_cb *aio_req_ornot;
98		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
99	static int started, wanted;	149	static unsigned int started, wanted;
100	static volatile int nreqs;	150
101	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;
102	static int respipe [2];	202	static int respipe [2];
103		203
104	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
105	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
106	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
107		207
108	static volatile aio_req reqs, reqe; /* queue start, queue end */	208	#if WORDREAD_UNSAFE
109	static volatile aio_req ress, rese; /* queue start, queue end */
110		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);
111	static void req_invoke (aio_req req);	294	static void req_invoke (aio_req req);
112	static void req_free (aio_req req);	295	static void req_free (aio_req req);
		296	static void req_cancel (aio_req req);
113		297
114	/* must be called at most once */	298	/* must be called at most once */
115	static SV *req_sv (aio_req req, const char *klass)	299	static SV *req_sv (aio_req req, const char *klass)
116	{	300	{
117	if (!req->self)	301	if (!req->self)
…		…
148	ENTER;	332	ENTER;
149	SAVETMPS;	333	SAVETMPS;
150	PUSHMARK (SP);	334	PUSHMARK (SP);
151	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	335	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
152	PUTBACK;	336	PUTBACK;
153	call_sv (grp->fh2, G_VOID | G_EVAL);	337	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
154	SPAGAIN;	338	SPAGAIN;
155	FREETMPS;	339	FREETMPS;
156	LEAVE;	340	LEAVE;
157	}	341	}
158		342
…		…
179	req_invoke (grp);	363	req_invoke (grp);
180	req_free (grp);	364	req_free (grp);
181	}	365	}
182	}	366	}
183		367
184	static void poll_wait ()
185	{
186	if (nreqs && !ress)
187	{
188	fd_set rfd;
189	FD_ZERO(&rfd);
190	FD_SET(respipe [0], &rfd);
191
192	select (respipe [0] + 1, &rfd, 0, 0, 0);
193	}
194	}
195
196	static void req_invoke (aio_req req)	368	static void req_invoke (aio_req req)
197	{	369	{
198	dSP;	370	dSP;
199	int errorno = errno;
200		371
201	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))	372	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
202	return;	373	{
203
204	errno = req->errorno;
205
206	ENTER;	374	ENTER;
207	SAVETMPS;	375	SAVETMPS;
208	PUSHMARK (SP);	376	PUSHMARK (SP);
209	EXTEND (SP, 1);	377	EXTEND (SP, 1);
210		378
211	switch (req->type)	379	switch (req->type)
212	{
213	case REQ_READDIR:
214	{	380	{
215	SV *rv = &PL_sv_undef;	381	case REQ_READDIR:
216
217	if (req->result >= 0)
218	{	382	{
219	char *buf = req->data2ptr;	383	SV *rv = &PL_sv_undef;
220	AV *av = newAV ();
221		384
222	while (req->result)	385	if (req->result >= 0)
223	{	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	{
224	SV *sv = newSVpv (buf, 0);	395	SV *sv = newSVpv (buf, 0);
225		396
226	av_push (av, sv);	397	av_store (av, i, sv);
227	buf += SvCUR (sv) + 1;	398	buf += SvCUR (sv) + 1;
228	req->result--;	399	}
		400
		401	rv = sv_2mortal (newRV_noinc ((SV *)av));
229	}	402	}
230		403
231	rv = sv_2mortal (newRV_noinc ((SV *)av));	404	PUSHs (rv);
232	}	405	}
		406	break;
233		407
234	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;
235	}	446	}
236	break;
237		447
238	case REQ_OPEN:	448	errno = req->errorno;
239	{
240	/* convert fd to fh */
241	SV *fh;
242		449
243	PUSHs (sv_2mortal (newSViv (req->result)));
244	PUTBACK;	450	PUTBACK;
245	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
246	SPAGAIN;
247
248	fh = SvREFCNT_inc (POPs);
249
250	PUSHMARK (SP);
251	XPUSHs (sv_2mortal (fh));
252	}
253	break;
254
255	case REQ_GROUP:
256	req->fd = 2; /* mark group as finished */
257
258	if (req->data)
259	{
260	int i;
261	AV *av = (AV *)req->data;
262
263	EXTEND (SP, AvFILL (av) + 1);
264	for (i = 0; i <= AvFILL (av); ++i)
265	PUSHs (*av_fetch (av, i, 0));
266	}
267	break;
268
269	case REQ_NOP:
270	case REQ_SLEEP:
271	break;
272
273	default:
274	PUSHs (sv_2mortal (newSViv (req->result)));
275	break;
276	}
277
278
279	PUTBACK;
280	call_sv (req->callback, G_VOID | G_EVAL);	451	call_sv (req->callback, G_VOID | G_EVAL);
281	SPAGAIN;	452	SPAGAIN;
282		453
283	FREETMPS;	454	FREETMPS;
284	LEAVE;	455	LEAVE;
285
286	errno = errorno;
287
288	if (SvTRUE (ERRSV))
289	{	456	}
290	req_free (req);
291	croak (0);
292	}
293	}
294		457
295	static void req_free (aio_req req)
296	{
297	if (req->grp)	458	if (req->grp)
298	{	459	{
299	aio_req grp = req->grp;	460	aio_req grp = req->grp;
300		461
301	/* unlink request */	462	/* unlink request */
…		…
306	grp->grp_first = req->grp_next;	467	grp->grp_first = req->grp_next;
307		468
308	aio_grp_dec (grp);	469	aio_grp_dec (grp);
309	}	470	}
310		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	{
311	if (req->self)	481	if (req->self)
312	{	482	{
313	sv_unmagic (req->self, PERL_MAGIC_ext);	483	sv_unmagic (req->self, PERL_MAGIC_ext);
314	SvREFCNT_dec (req->self);	484	SvREFCNT_dec (req->self);
315	}	485	}
…		…
318	SvREFCNT_dec (req->fh);	488	SvREFCNT_dec (req->fh);
319	SvREFCNT_dec (req->fh2);	489	SvREFCNT_dec (req->fh2);
320	SvREFCNT_dec (req->callback);	490	SvREFCNT_dec (req->callback);
321	Safefree (req->statdata);	491	Safefree (req->statdata);
322		492
323	if (req->type == REQ_READDIR && req->result >= 0)	493	if (req->type == REQ_READDIR)
324	free (req->data2ptr);	494	free (req->data2ptr);
325		495
326	Safefree (req);	496	Safefree (req);
327	}	497	}
328		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
329	static void req_cancel (aio_req req)	513	static void req_cancel (aio_req req)
330	{	514	{
331	req->flags |= FLAG_CANCELLED;	515	req->flags |= FLAG_CANCELLED;
332		516
333	if (req->type == REQ_GROUP)	517	req_cancel_subs (req);
334	{	518	}
335	aio_req sub;
336		519
337	for (sub = req->grp_first; sub; sub = sub->grp_next)	520	static void *aio_proc(void *arg);
338	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)
339	}	545	{
340	}	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);
341		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
342	static int poll_cb ()	660	static int poll_cb (int max)
343	{	661	{
344	dSP;	662	dSP;
345	int count = 0;	663	int count = 0;
346	int do_croak = 0;	664	int do_croak = 0;
347	aio_req req;	665	aio_req req;
348		666
349	for (;;)	667	for (;;)
350	{	668	{
351	pthread_mutex_lock (&reslock);	669	while (max <= 0 || count < max)
352	req = ress;
353
354	if (req)
355	{	670	{
356	ress = req->next;	671	maybe_start_thread ();
357		672
		673	LOCK (reslock);
		674	req = reqq_shift (&res_queue);
		675
358	if (!ress)	676	if (req)
359	{	677	{
		678	--npending;
		679
		680	if (!res_queue.size)
		681	{
360	/* read any signals sent by the worker threads */	682	/* read any signals sent by the worker threads */
361	char buf [32];	683	char buf [32];
362	while (read (respipe [0], buf, 32) == 32)	684	while (read (respipe [0], buf, 32) == 32)
		685	;
363	;	686	}
364
365	rese = 0;
366	}	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);
367	}	722	}
368		723
369	pthread_mutex_unlock (&reslock);	724	if (nreqs <= max_outstanding)
370
371	if (!req)
372	break;	725	break;
373		726
374	--nreqs;	727	poll_wait ();
375		728
376	if (req->type == REQ_QUIT)	729	max = 0;
377	started--;
378	else if (req->type == REQ_GROUP && req->length)
379	{
380	req->fd = 1; /* mark request as delayed */
381	continue;
382	}
383	else
384	{
385	if (req->type == REQ_READ)
386	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
387
388	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
389	SvREADONLY_off (req->data);
390
391	if (req->statdata)
392	{
393	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
394	PL_laststatval = req->result;
395	PL_statcache = *(req->statdata);
396	}
397
398	req_invoke (req);
399
400	count++;
401	}
402
403	req_free (req);
404	}	730	}
405		731
406	return count;	732	return count;
407	}
408
409	static void *aio_proc(void *arg);
410
411	static void start_thread (void)
412	{
413	sigset_t fullsigset, oldsigset;
414	pthread_t tid;
415	pthread_attr_t attr;
416
417	pthread_attr_init (&attr);
418	pthread_attr_setstacksize (&attr, STACKSIZE);
419	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
420
421	sigfillset (&fullsigset);
422	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
423
424	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
425	started++;
426
427	sigprocmask (SIG_SETMASK, &oldsigset, 0);
428	}
429
430	static void req_send (aio_req req)
431	{
432	while (started < wanted && nreqs >= started)
433	start_thread ();
434
435	++nreqs;
436
437	pthread_mutex_lock (&reqlock);
438
439	req->next = 0;
440
441	if (reqe)
442	{
443	reqe->next = req;
444	reqe = req;
445	}
446	else
447	reqe = reqs = req;
448
449	pthread_cond_signal (&reqwait);
450	pthread_mutex_unlock (&reqlock);
451
452	if (nreqs > max_outstanding)
453	for (;;)
454	{
455	poll_cb ();
456
457	if (nreqs <= max_outstanding)
458	break;
459
460	poll_wait ();
461	}
462	}
463
464	static void end_thread (void)
465	{
466	aio_req req;
467	Newz (0, req, 1, aio_cb);
468	req->type = REQ_QUIT;
469
470	req_send (req);
471	}
472
473	static void min_parallel (int nthreads)
474	{
475	if (wanted < nthreads)
476	wanted = nthreads;
477	}
478
479	static void max_parallel (int nthreads)
480	{
481	int cur = started;
482
483	if (wanted > nthreads)
484	wanted = nthreads;
485
486	while (cur > wanted)
487	{
488	end_thread ();
489	cur--;
490	}
491
492	while (started > wanted)
493	{
494	poll_wait ();
495	poll_cb ();
496	}
497	}	733	}
498		734
499	static void create_pipe ()	735	static void create_pipe ()
500	{	736	{
501	if (pipe (respipe))	737	if (pipe (respipe))
…		…
525	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)
526	{	762	{
527	ssize_t res;	763	ssize_t res;
528	off_t ooffset;	764	off_t ooffset;
529		765
530	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
531	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
532	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
533	res = read (fd, buf, count);	769	res = read (fd, buf, count);
534	lseek (fd, ooffset, SEEK_SET);	770	lseek (fd, ooffset, SEEK_SET);
535	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
536		772
537	return res;	773	return res;
538	}	774	}
539		775
540	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)
541	{	777	{
542	ssize_t res;	778	ssize_t res;
543	off_t ooffset;	779	off_t ooffset;
544		780
545	pthread_mutex_lock (&preadwritelock);	781	LOCK (preadwritelock);
546	ooffset = lseek (fd, 0, SEEK_CUR);	782	ooffset = lseek (fd, 0, SEEK_CUR);
547	lseek (fd, offset, SEEK_SET);	783	lseek (fd, offset, SEEK_SET);
548	res = write (fd, buf, count);	784	res = write (fd, buf, count);
549	lseek (fd, offset, SEEK_SET);	785	lseek (fd, offset, SEEK_SET);
550	pthread_mutex_unlock (&preadwritelock);	786	UNLOCK (preadwritelock);
551		787
552	return res;	788	return res;
553	}	789	}
554	#endif	790	#endif
555		791
556	#if !HAVE_FDATASYNC	792	#if !HAVE_FDATASYNC
557	# define fdatasync fsync	793	# define fdatasync fsync
558	#endif	794	#endif
559		795
560	#if !HAVE_READAHEAD	796	#if !HAVE_READAHEAD
561	# define readahead aio_readahead	797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
562		798
563	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)
564	{	800	{
565	char readahead_buf[4096];	801	dBUF;
566		802
567	while (count > 0)	803	while (count > 0)
568	{	804	{
569	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
570		806
571	pread (fd, readahead_buf, len, offset);	807	pread (fd, aio_buf, len, offset);
572	offset += len;	808	offset += len;
573	count -= len;	809	count -= len;
574	}	810	}
575		811
576	errno = 0;	812	errno = 0;
577	}	813	}
		814
578	#endif	815	#endif
579		816
580	#if !HAVE_READDIR_R	817	#if !HAVE_READDIR_R
581	# define readdir_r aio_readdir_r	818	# define readdir_r aio_readdir_r
582		819
…		…
585	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)
586	{	823	{
587	struct dirent *e;	824	struct dirent *e;
588	int errorno;	825	int errorno;
589		826
590	pthread_mutex_lock (&readdirlock);	827	LOCK (readdirlock);
591		828
592	e = readdir (dirp);	829	e = readdir (dirp);
593	errorno = errno;	830	errorno = errno;
594		831
595	if (e)	832	if (e)
…		…
598	strcpy (ent->d_name, e->d_name);	835	strcpy (ent->d_name, e->d_name);
599	}	836	}
600	else	837	else
601	*res = 0;	838	*res = 0;
602		839
603	pthread_mutex_unlock (&readdirlock);	840	UNLOCK (readdirlock);
604		841
605	errno = errorno;	842	errno = errorno;
606	return e ? 0 : -1;	843	return e ? 0 : -1;
607	}	844	}
608	#endif	845	#endif
609		846
610	/* sendfile always needs emulation */	847	/* sendfile always needs emulation */
611	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)
612	{	849	{
613	ssize_t res;	850	ssize_t res;
614		851
615	if (!count)	852	if (!count)
616	return 0;	853	return 0;
…		…
627	{	864	{
628	off_t sbytes;	865	off_t sbytes;
629	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
630		867
631	if (res < 0 && sbytes)	868	if (res < 0 && sbytes)
632	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
633	res = sbytes;	870	res = sbytes;
634	}	871	}
635		872
636	# elif __hpux	873	# elif __hpux
637	res = sendfile (ofd, ifd, offset, count, 0, 0);	874	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
665	#endif	902	#endif
666	)	903	)
667	)	904	)
668	{	905	{
669	/* emulate sendfile. this is a major pain in the ass */	906	/* emulate sendfile. this is a major pain in the ass */
670	char buf[4096];	907	dBUF;
		908
671	res = 0;	909	res = 0;
672		910
673	while (count)	911	while (count)
674	{	912	{
675	ssize_t cnt;	913	ssize_t cnt;
676		914
677	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
678		916
679	if (cnt <= 0)	917	if (cnt <= 0)
680	{	918	{
681	if (cnt && !res) res = -1;	919	if (cnt && !res) res = -1;
682	break;	920	break;
683	}	921	}
684		922
685	cnt = write (ofd, buf, cnt);	923	cnt = write (ofd, aio_buf, cnt);
686		924
687	if (cnt <= 0)	925	if (cnt <= 0)
688	{	926	{
689	if (cnt && !res) res = -1;	927	if (cnt && !res) res = -1;
690	break;	928	break;
…		…
698		936
699	return res;	937	return res;
700	}	938	}
701		939
702	/* read a full directory */	940	/* read a full directory */
703	static int scandir_ (const char *path, void **namesp)	941	static void scandir_ (aio_req req, worker *self)
704	{	942	{
705	DIR *dirp = opendir (path);	943	DIR *dirp;
706	union	944	union
707	{	945	{
708	struct dirent d;	946	struct dirent d;
709	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	947	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
710	} u;	948	} *u;
711	struct dirent *entp;	949	struct dirent *entp;
712	char *name, *names;	950	char *name, *names;
713	int memlen = 4096;	951	int memlen = 4096;
714	int memofs = 0;	952	int memofs = 0;
715	int res = 0;	953	int res = 0;
716	int errorno;	954	int errorno;
717		955
718	if (!dirp)	956	LOCK (wrklock);
719	return -1;	957	self->dirp = dirp = opendir (req->dataptr);
720		958	self->dbuf = u = malloc (sizeof (*u));
721	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;
722		1007
723	for (;;)	1008	for (;;)
724	{	1009	{
725	errno = 0, readdir_r (dirp, &u.d, &entp);	1010	LOCK (reqlock);
726
727	if (!entp)
728	break;
729
730	name = entp->d_name;
731
732	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
733	{
734	int len = strlen (name) + 1;
735
736	res++;
737
738	while (memofs + len > memlen)
739	{
740	memlen *= 2;
741	names = realloc (names, memlen);
742	if (!names)
743	break;
744	}
745
746	memcpy (names + memofs, name, len);
747	memofs += len;
748	}
749	}
750
751	errorno = errno;
752	closedir (dirp);
753
754	if (errorno)
755	{
756	free (names);
757	errno = errorno;
758	res = -1;
759	}
760
761	*namesp = (void *)names;
762	return res;
763	}
764
765	/*****************************************************************************/
766
767	static void *aio_proc (void *thr_arg)
768	{
769	aio_req req;
770	int type;
771
772	do
773	{
774	pthread_mutex_lock (&reqlock);
775		1011
776	for (;;)	1012	for (;;)
777	{	1013	{
778	req = reqs;	1014	self->req = req = reqq_shift (&req_queue);
779
780	if (reqs)
781	{
782	reqs = reqs->next;
783	if (!reqs) reqe = 0;
784	}
785		1015
786	if (req)	1016	if (req)
787	break;	1017	break;
788		1018
789	pthread_cond_wait (&reqwait, &reqlock);	1019	pthread_cond_wait (&reqwait, &reqlock);
790	}	1020	}
791		1021
792	pthread_mutex_unlock (&reqlock);	1022	--nready;
		1023
		1024	UNLOCK (reqlock);
793		1025
794	errno = 0; /* strictly unnecessary */	1026	errno = 0; /* strictly unnecessary */
795		1027
796	if (!(req->flags & FLAG_CANCELLED))	1028	if (!(req->flags & FLAG_CANCELLED))
797	switch (type = req->type) /* remember type for QUIT check */	1029	switch (req->type)
798	{	1030	{
799	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;
800	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;
801		1033
802	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;
803	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;
804		1036
805	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
806	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
807	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
808		1040
…		…
811	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1043	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
812	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1044	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
813	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1045	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
814	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1046	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
815	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;
816		1049
817	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1050	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
818	case REQ_FSYNC: req->result = fsync (req->fd); break;	1051	case REQ_FSYNC: req->result = fsync (req->fd); break;
819	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1052	case REQ_READDIR: scandir_ (req, self); break;
820		1053
821	case REQ_SLEEP:	1054	case REQ_BUSY:
822	{	1055	{
823	struct timeval tv;	1056	struct timeval tv;
824		1057
825	tv.tv_sec = req->fd;	1058	tv.tv_sec = req->fd;
826	tv.tv_usec = req->fd2;	1059	tv.tv_usec = req->fd2;
…		…
828	req->result = select (0, 0, 0, 0, &tv);	1061	req->result = select (0, 0, 0, 0, &tv);
829	}	1062	}
830		1063
831	case REQ_GROUP:	1064	case REQ_GROUP:
832	case REQ_NOP:	1065	case REQ_NOP:
		1066	break;
		1067
833	case REQ_QUIT:	1068	case REQ_QUIT:
		1069	LOCK (wrklock);
		1070	worker_free (self);
		1071	--started;
		1072	UNLOCK (wrklock);
834	break;	1073	return 0;
835		1074
836	default:	1075	default:
837	req->result = ENOSYS;	1076	req->result = ENOSYS;
838	break;	1077	break;
839	}	1078	}
840		1079
841	req->errorno = errno;	1080	req->errorno = errno;
842		1081
843	pthread_mutex_lock (&reslock);	1082	LOCK (reslock);
844		1083
845	req->next = 0;	1084	++npending;
846		1085
847	if (rese)	1086	if (!reqq_push (&res_queue, req))
848	{
849	rese->next = req;
850	rese = req;
851	}
852	else
853	{
854	rese = ress = req;
855
856	/* write a dummy byte to the pipe so fh becomes ready */	1087	/* write a dummy byte to the pipe so fh becomes ready */
857	write (respipe [1], &respipe, 1);	1088	write (respipe [1], &respipe, 1);
858	}
859		1089
860	pthread_mutex_unlock (&reslock);	1090	self->req = 0;
861	}	1091	worker_clear (self);
862	while (type != REQ_QUIT);
863		1092
864	return 0;	1093	UNLOCK (reslock);
		1094	}
865	}	1095	}
866		1096
867	/*****************************************************************************/	1097	/*****************************************************************************/
868		1098
869	static void atfork_prepare (void)	1099	static void atfork_prepare (void)
870	{	1100	{
871	pthread_mutex_lock (&reqlock);	1101	LOCK (wrklock);
872	pthread_mutex_lock (&reslock);	1102	LOCK (reqlock);
		1103	LOCK (reslock);
873	#if !HAVE_PREADWRITE	1104	#if !HAVE_PREADWRITE
874	pthread_mutex_lock (&preadwritelock);	1105	LOCK (preadwritelock);
875	#endif	1106	#endif
876	#if !HAVE_READDIR_R	1107	#if !HAVE_READDIR_R
877	pthread_mutex_lock (&readdirlock);	1108	LOCK (readdirlock);
878	#endif	1109	#endif
879	}	1110	}
880		1111
881	static void atfork_parent (void)	1112	static void atfork_parent (void)
882	{	1113	{
883	#if !HAVE_READDIR_R	1114	#if !HAVE_READDIR_R
884	pthread_mutex_unlock (&readdirlock);	1115	UNLOCK (readdirlock);
885	#endif	1116	#endif
886	#if !HAVE_PREADWRITE	1117	#if !HAVE_PREADWRITE
887	pthread_mutex_unlock (&preadwritelock);	1118	UNLOCK (preadwritelock);
888	#endif	1119	#endif
889	pthread_mutex_unlock (&reslock);	1120	UNLOCK (reslock);
890	pthread_mutex_unlock (&reqlock);	1121	UNLOCK (reqlock);
		1122	UNLOCK (wrklock);
891	}	1123	}
892		1124
893	static void atfork_child (void)	1125	static void atfork_child (void)
894	{	1126	{
895	aio_req prv;	1127	aio_req prv;
896		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
897	started = 0;	1146	started = 0;
898		1147	nreqs = 0;
899	while (reqs)
900	{
901	prv = reqs;
902	reqs = prv->next;
903	req_free (prv);
904	}
905
906	reqs = reqe = 0;
907
908	while (ress)
909	{
910	prv = ress;
911	ress = prv->next;
912	req_free (prv);
913	}
914
915	ress = rese = 0;
916		1148
917	close (respipe [0]);	1149	close (respipe [0]);
918	close (respipe [1]);	1150	close (respipe [1]);
919	create_pipe ();	1151	create_pipe ();
920		1152
921	atfork_parent ();	1153	atfork_parent ();
922	}	1154	}
923		1155
924	#define dREQ \	1156	#define dREQ \
925	aio_req req; \	1157	aio_req req; \
		1158	int req_pri = next_pri; \
		1159	next_pri = DEFAULT_PRI + PRI_BIAS; \
926	\	1160	\
927	if (SvOK (callback) && !SvROK (callback)) \	1161	if (SvOK (callback) && !SvROK (callback)) \
928	croak ("callback must be undef or of reference type"); \	1162	croak ("callback must be undef or of reference type"); \
929	\	1163	\
930	Newz (0, req, 1, aio_cb); \	1164	Newz (0, req, 1, aio_cb); \
931	if (!req) \	1165	if (!req) \
932	croak ("out of memory during aio_req allocation"); \	1166	croak ("out of memory during aio_req allocation"); \
933	\	1167	\
934	req->callback = newSVsv (callback)	1168	req->callback = newSVsv (callback); \
		1169	req->pri = req_pri
935		1170
936	#define REQ_SEND \	1171	#define REQ_SEND \
937	req_send (req); \	1172	req_send (req); \
938	\	1173	\
939	if (GIMME_V != G_VOID) \	1174	if (GIMME_V != G_VOID) \
…		…
944	PROTOTYPES: ENABLE	1179	PROTOTYPES: ENABLE
945		1180
946	BOOT:	1181	BOOT:
947	{	1182	{
948	HV *stash = gv_stashpv ("IO::AIO", 1);	1183	HV *stash = gv_stashpv ("IO::AIO", 1);
		1184
949	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1185	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
950	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1186	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
951	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1187	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1188	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1189	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1190	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
952		1191
953	create_pipe ();	1192	create_pipe ();
954	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1193	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
955	}
956		1194
		1195	start_thread ();
		1196	}
		1197
957	void	1198	void
958	min_parallel (nthreads)	1199	min_parallel (int nthreads)
959	int nthreads
960	PROTOTYPE: $	1200	PROTOTYPE: $
961		1201
962	void	1202	void
963	max_parallel (nthreads)	1203	max_parallel (int nthreads)
964	int nthreads
965	PROTOTYPE: $	1204	PROTOTYPE: $
966		1205
967	int	1206	int
968	max_outstanding (nreqs)	1207	max_outstanding (int maxreqs)
969	int nreqs	1208	PROTOTYPE: $
970	PROTOTYPE: $
971	CODE:	1209	CODE:
972	RETVAL = max_outstanding;	1210	RETVAL = max_outstanding;
973	max_outstanding = nreqs;	1211	max_outstanding = maxreqs;
		1212	OUTPUT:
		1213	RETVAL
974		1214
975	void	1215	void
976	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1216	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
977	SV * pathname	1217	SV * pathname
978	int flags	1218	int flags
…		…
1193		1433
1194	REQ_SEND;	1434	REQ_SEND;
1195	}	1435	}
1196		1436
1197	void	1437	void
		1438	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1439	SV * pathname
		1440	SV * callback
		1441	UV mode
		1442	UV dev
		1443	PPCODE:
		1444	{
		1445	dREQ;
		1446
		1447	req->type = REQ_MKNOD;
		1448	req->data = newSVsv (pathname);
		1449	req->dataptr = SvPVbyte_nolen (req->data);
		1450	req->mode = (mode_t)mode;
		1451	req->offset = dev;
		1452
		1453	REQ_SEND;
		1454	}
		1455
		1456	void
1198	aio_sleep (delay,callback=&PL_sv_undef)	1457	aio_busy (delay,callback=&PL_sv_undef)
1199	double delay	1458	double delay
1200	SV * callback	1459	SV * callback
1201	PPCODE:	1460	PPCODE:
1202	{	1461	{
1203	dREQ;	1462	dREQ;
1204		1463
1205	req->type = REQ_SLEEP;	1464	req->type = REQ_BUSY;
1206	req->fd = delay < 0. ? 0 : delay;	1465	req->fd = delay < 0. ? 0 : delay;
1207	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1466	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1208		1467
1209	REQ_SEND;	1468	REQ_SEND;
1210	}	1469	}
…		…
1214	SV * callback	1473	SV * callback
1215	PROTOTYPE: ;$	1474	PROTOTYPE: ;$
1216	PPCODE:	1475	PPCODE:
1217	{	1476	{
1218	dREQ;	1477	dREQ;
		1478
1219	req->type = REQ_GROUP;	1479	req->type = REQ_GROUP;
1220	req_send (req);	1480	req_send (req);
		1481
1221	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1482	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1222	}	1483	}
1223		1484
1224	void	1485	void
1225	aio_nop (callback=&PL_sv_undef)	1486	aio_nop (callback=&PL_sv_undef)
…		…
1230		1491
1231	req->type = REQ_NOP;	1492	req->type = REQ_NOP;
1232		1493
1233	REQ_SEND;	1494	REQ_SEND;
1234	}	1495	}
		1496
		1497	int
		1498	aioreq_pri (int pri = 0)
		1499	PROTOTYPE: ;$
		1500	CODE:
		1501	RETVAL = next_pri - PRI_BIAS;
		1502	if (items > 0)
		1503	{
		1504	if (pri < PRI_MIN) pri = PRI_MIN;
		1505	if (pri > PRI_MAX) pri = PRI_MAX;
		1506	next_pri = pri + PRI_BIAS;
		1507	}
		1508	OUTPUT:
		1509	RETVAL
		1510
		1511	void
		1512	aioreq_nice (int nice = 0)
		1513	CODE:
		1514	nice = next_pri - nice;
		1515	if (nice < PRI_MIN) nice = PRI_MIN;
		1516	if (nice > PRI_MAX) nice = PRI_MAX;
		1517	next_pri = nice + PRI_BIAS;
1235		1518
1236	void	1519	void
1237	flush ()	1520	flush ()
1238	PROTOTYPE:	1521	PROTOTYPE:
1239	CODE:	1522	CODE:
1240	while (nreqs)	1523	while (nreqs)
1241	{	1524	{
1242	poll_wait ();	1525	poll_wait ();
1243	poll_cb ();	1526	poll_cb (0);
1244	}	1527	}
1245		1528
1246	void	1529	void
1247	poll()	1530	poll()
1248	PROTOTYPE:	1531	PROTOTYPE:
1249	CODE:	1532	CODE:
1250	if (nreqs)	1533	if (nreqs)
1251	{	1534	{
1252	poll_wait ();	1535	poll_wait ();
1253	poll_cb ();	1536	poll_cb (0);
1254	}	1537	}
1255		1538
1256	int	1539	int
1257	poll_fileno()	1540	poll_fileno()
1258	PROTOTYPE:	1541	PROTOTYPE:
…		…
1263		1546
1264	int	1547	int
1265	poll_cb(...)	1548	poll_cb(...)
1266	PROTOTYPE:	1549	PROTOTYPE:
1267	CODE:	1550	CODE:
1268	RETVAL = poll_cb ();	1551	RETVAL = poll_cb (0);
		1552	OUTPUT:
		1553	RETVAL
		1554
		1555	int
		1556	poll_some(int max = 0)
		1557	PROTOTYPE: $
		1558	CODE:
		1559	RETVAL = poll_cb (max);
1269	OUTPUT:	1560	OUTPUT:
1270	RETVAL	1561	RETVAL
1271		1562
1272	void	1563	void
1273	poll_wait()	1564	poll_wait()
…		…
1282	CODE:	1573	CODE:
1283	RETVAL = nreqs;	1574	RETVAL = nreqs;
1284	OUTPUT:	1575	OUTPUT:
1285	RETVAL	1576	RETVAL
1286		1577
		1578	int
		1579	nready()
		1580	PROTOTYPE:
		1581	CODE:
		1582	RETVAL = get_nready ();
		1583	OUTPUT:
		1584	RETVAL
		1585
		1586	int
		1587	npending()
		1588	PROTOTYPE:
		1589	CODE:
		1590	RETVAL = get_npending ();
		1591	OUTPUT:
		1592	RETVAL
		1593
1287	PROTOTYPES: DISABLE	1594	PROTOTYPES: DISABLE
1288		1595
1289	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1596	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1290		1597
1291	void	1598	void
1292	cancel (aio_req_ornot req)	1599	cancel (aio_req_ornot req)
1293	PROTOTYPE:
1294	CODE:	1600	CODE:
1295	req_cancel (req);	1601	req_cancel (req);
1296		1602
1297	void	1603	void
1298	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1604	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
…		…
1334	}	1640	}
1335	}	1641	}
1336	}	1642	}
1337		1643
1338	void	1644	void
		1645	cancel_subs (aio_req_ornot req)
		1646	CODE:
		1647	req_cancel_subs (req);
		1648
		1649	void
1339	result (aio_req grp, ...)	1650	result (aio_req grp, ...)
1340	CODE:	1651	CODE:
1341	{	1652	{
1342	int i;	1653	int i;
		1654	AV *av;
		1655
		1656	grp->errorno = errno;
		1657
1343	AV *av = newAV ();	1658	av = newAV ();
1344		1659
1345	for (i = 1; i < items; ++i )	1660	for (i = 1; i < items; ++i )
1346	av_push (av, newSVsv (ST (i)));	1661	av_push (av, newSVsv (ST (i)));
1347		1662
1348	SvREFCNT_dec (grp->data);	1663	SvREFCNT_dec (grp->data);
1349	grp->data = (SV *)av;	1664	grp->data = (SV *)av;
1350	}	1665	}
1351		1666
1352	void	1667	void
		1668	errno (aio_req grp, int errorno = errno)
		1669	CODE:
		1670	grp->errorno = errorno;
		1671
		1672	void
1353	feed_limit (aio_req grp, int limit)	1673	limit (aio_req grp, int limit)
1354	CODE:	1674	CODE:
1355	grp->fd2 = limit;	1675	grp->fd2 = limit;
1356	aio_grp_feed (grp);	1676	aio_grp_feed (grp);
1357		1677
1358	void	1678	void

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