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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 1.84 by root, Sat Oct 28 01:24:19 2006 UTC

		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
		5	# define _GNU_SOURCE
		6	#endif
		7
		8	/* just in case */
1	#define _REENTRANT 1	9	#define _REENTRANT 1
		10
2	#include <errno.h>	11	#include <errno.h>
3		12
4	#include "EXTERN.h"	13	#include "EXTERN.h"
5	#include "perl.h"	14	#include "perl.h"
6	#include "XSUB.h"	15	#include "XSUB.h"
…		…
34	# else	43	# else
35	# error sendfile support requested but not available	44	# error sendfile support requested but not available
36	# endif	45	# endif
37	#endif	46	#endif
38		47
		48	/* number of seconds after which idle threads exit */
		49	#define IDLE_TIMEOUT 10
		50
39	/* used for struct dirent, AIX doesn't provide it */	51	/* used for struct dirent, AIX doesn't provide it */
40	#ifndef NAME_MAX	52	#ifndef NAME_MAX
41	# define NAME_MAX 4096	53	# define NAME_MAX 4096
42	#endif	54	#endif
43		55
		56	#ifndef PTHREAD_STACK_MIN
		57	/* care for broken platforms, e.g. windows */
		58	# define PTHREAD_STACK_MIN 16384
		59	#endif
		60
44	#if __ia64	61	#if __ia64
45	# define STACKSIZE 65536	62	# define STACKSIZE 65536
		63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		64	# define STACKSIZE PTHREAD_STACK_MIN
46	#else	65	#else
47	# define STACKSIZE 8192	66	# define STACKSIZE 16384
		67	#endif
		68
		69	/* wether word reads are potentially non-atomic.
		70	* this is conservatice, likely most arches this runs
		71	* on have atomic word read/writes.
		72	*/
		73	#ifndef WORDREAD_UNSAFE
		74	# if __i386 || __x86_64
		75	# define WORDREAD_UNSAFE 0
		76	# else
		77	# define WORDREAD_UNSAFE 1
48	#endif	78	# endif
		79	#endif
		80
		81	/* buffer size for various temporary buffers */
		82	#define AIO_BUFSIZE 65536
		83
		84	#define dBUF \
		85	char *aio_buf; \
		86	LOCK (wrklock); \
		87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		88	UNLOCK (wrklock); \
		89	if (!aio_buf) \
		90	return -1;
49		91
50	enum {	92	enum {
51	REQ_QUIT,	93	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,	94	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,	96	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,	98	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,	100	REQ_MKNOD, REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,	101	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,	102	REQ_GROUP, REQ_NOP,
61	REQ_GROUP,	103	REQ_BUSY,
62	};	104	};
63		105
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	106	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	107	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		108
67	typedef struct aio_cb	109	typedef struct aio_cb
68	{	110	{
69	struct aio_cb *volatile next;	111	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		112
75	SV *data, *callback;	113	SV *data, *callback;
76	SV *fh, *fh2;	114	SV *fh, *fh2;
77	void *dataptr, *data2ptr;	115	void *dataptr, *data2ptr;
78	Stat_t *statdata;	116	Stat_t *statdata;
79	off_t offset;	117	off_t offset;
80	size_t length;	118	size_t length;
81	ssize_t result;	119	ssize_t result;
82		120
		121	STRLEN dataoffset;
83	int type;	122	int type;
84	int fd, fd2;	123	int fd, fd2;
85	int errorno;	124	int errorno;
86	STRLEN dataoffset;
87	mode_t mode; /* open */	125	mode_t mode; /* open */
		126
88	unsigned char cancelled;	127	unsigned char flags;
		128	unsigned char pri;
		129
		130	SV *self; /* the perl counterpart of this request, if any */
		131	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
89	} aio_cb;	132	} aio_cb;
		133
		134	enum {
		135	FLAG_CANCELLED = 0x01,
		136	};
90		137
91	typedef aio_cb *aio_req;	138	typedef aio_cb *aio_req;
92	typedef aio_cb *aio_req_ornot;	139	typedef aio_cb *aio_req_ornot;
93		140
		141	enum {
		142	PRI_MIN = -4,
		143	PRI_MAX = 4,
		144
		145	DEFAULT_PRI = 0,
		146	PRI_BIAS = -PRI_MIN,
		147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		148	};
		149
		150	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		151
94	static int started, wanted;	152	static unsigned int started, idle, wanted;
95	static volatile int nreqs;	153
96	static int max_outstanding = 1<<30;	154	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		155	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		156	#else
		157	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		158	#endif
		159
		160	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		161	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		162
		163	/* worker threads management */
		164	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		165
		166	typedef struct worker {
		167	/* locked by wrklock */
		168	struct worker *prev, *next;
		169
		170	pthread_t tid;
		171
		172	/* locked by reslock, reqlock or wrklock */
		173	aio_req req; /* currently processed request */
		174	void *dbuf;
		175	DIR *dirp;
		176	} worker;
		177
		178	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		179
		180	static void worker_clear (worker *wrk)
		181	{
		182	if (wrk->dirp)
		183	{
		184	closedir (wrk->dirp);
		185	wrk->dirp = 0;
		186	}
		187
		188	if (wrk->dbuf)
		189	{
		190	free (wrk->dbuf);
		191	wrk->dbuf = 0;
		192	}
		193	}
		194
		195	static void worker_free (worker *wrk)
		196	{
		197	wrk->next->prev = wrk->prev;
		198	wrk->prev->next = wrk->next;
		199
		200	free (wrk);
		201	}
		202
		203	static volatile unsigned int nreqs, nready, npending;
		204	static volatile unsigned int max_idle = 4;
		205	static volatile unsigned int max_outstanding = 0xffffffff;
97	static int respipe [2];	206	static int respipe [2];
98		207
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	208	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	209	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	210	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		211
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	212	#if WORDREAD_UNSAFE
104	static volatile aio_req ress, rese; /* queue start, queue end */
105		213
		214	static unsigned int get_nready ()
		215	{
		216	unsigned int retval;
		217
		218	LOCK (reqlock);
		219	retval = nready;
		220	UNLOCK (reqlock);
		221
		222	return retval;
		223	}
		224
		225	static unsigned int get_npending ()
		226	{
		227	unsigned int retval;
		228
		229	LOCK (reslock);
		230	retval = npending;
		231	UNLOCK (reslock);
		232
		233	return retval;
		234	}
		235
		236	#else
		237
		238	# define get_nready() nready
		239	# define get_npending() npending
		240
		241	#endif
		242
		243	/*
		244	* a somewhat faster data structure might be nice, but
		245	* with 8 priorities this actually needs <20 insns
		246	* per shift, the most expensive operation.
		247	*/
		248	typedef struct {
		249	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		250	int size;
		251	} reqq;
		252
		253	static reqq req_queue;
		254	static reqq res_queue;
		255
		256	int reqq_push (reqq *q, aio_req req)
		257	{
		258	int pri = req->pri;
		259	req->next = 0;
		260
		261	if (q->qe[pri])
		262	{
		263	q->qe[pri]->next = req;
		264	q->qe[pri] = req;
		265	}
		266	else
		267	q->qe[pri] = q->qs[pri] = req;
		268
		269	return q->size++;
		270	}
		271
		272	aio_req reqq_shift (reqq *q)
		273	{
		274	int pri;
		275
		276	if (!q->size)
		277	return 0;
		278
		279	--q->size;
		280
		281	for (pri = NUM_PRI; pri--; )
		282	{
		283	aio_req req = q->qs[pri];
		284
		285	if (req)
		286	{
		287	if (!(q->qs[pri] = req->next))
		288	q->qe[pri] = 0;
		289
		290	return req;
		291	}
		292	}
		293
		294	abort ();
		295	}
		296
		297	static int poll_cb (int max);
106	static void req_invoke (aio_req req);	298	static void req_invoke (aio_req req);
107	static void req_free (aio_req req);	299	static void req_free (aio_req req);
		300	static void req_cancel (aio_req req);
108		301
109	/* must be called at most once */	302	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	303	static SV *req_sv (aio_req req, const char *klass)
111	{	304	{
112	if (!req->self)	305	if (!req->self)
…		…
118	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	311	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
119	}	312	}
120		313
121	static aio_req SvAIO_REQ (SV *sv)	314	static aio_req SvAIO_REQ (SV *sv)
122	{	315	{
		316	MAGIC *mg;
		317
123	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	318	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
124	croak ("object of class " AIO_REQ_KLASS " expected");	319	croak ("object of class " AIO_REQ_KLASS " expected");
125		320
126	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	321	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
127		322
128	return mg ? (aio_req)mg->mg_ptr : 0;	323	return mg ? (aio_req)mg->mg_ptr : 0;
129	}	324	}
130		325
131	static void aio_grp_feed (aio_req grp)	326	static void aio_grp_feed (aio_req grp)
132	{	327	{
133	while (grp->length < grp->fd2)	328	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
134	{	329	{
135	int old_len = grp->length;	330	int old_len = grp->length;
136		331
137	if (grp->fh2 && SvOK (grp->fh2))	332	if (grp->fh2 && SvOK (grp->fh2))
138	{	333	{
…		…
141	ENTER;	336	ENTER;
142	SAVETMPS;	337	SAVETMPS;
143	PUSHMARK (SP);	338	PUSHMARK (SP);
144	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	339	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
145	PUTBACK;	340	PUTBACK;
146	call_sv (grp->fh2, G_VOID | G_EVAL);	341	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
147	SPAGAIN;	342	SPAGAIN;
148	FREETMPS;	343	FREETMPS;
149	LEAVE;	344	LEAVE;
150	}	345	}
151		346
…		…
172	req_invoke (grp);	367	req_invoke (grp);
173	req_free (grp);	368	req_free (grp);
174	}	369	}
175	}	370	}
176		371
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)	372	static void req_invoke (aio_req req)
190	{	373	{
191	dSP;	374	dSP;
192	int errorno = errno;
193		375
194	if (req->cancelled || !SvOK (req->callback))	376	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
195	return;	377	{
196
197	errno = req->errorno;
198
199	ENTER;	378	ENTER;
200	SAVETMPS;	379	SAVETMPS;
201	PUSHMARK (SP);	380	PUSHMARK (SP);
202	EXTEND (SP, 1);	381	EXTEND (SP, 1);
203		382
204	switch (req->type)	383	switch (req->type)
205	{
206	case REQ_READDIR:
207	{	384	{
208	SV *rv = &PL_sv_undef;	385	case REQ_READDIR:
209
210	if (req->result >= 0)
211	{	386	{
212	char *buf = req->data2ptr;	387	SV *rv = &PL_sv_undef;
213	AV *av = newAV ();
214		388
215	while (req->result)	389	if (req->result >= 0)
216	{	390	{
		391	int i;
		392	char *buf = req->data2ptr;
		393	AV *av = newAV ();
		394
		395	av_extend (av, req->result - 1);
		396
		397	for (i = 0; i < req->result; ++i)
		398	{
217	SV *sv = newSVpv (buf, 0);	399	SV *sv = newSVpv (buf, 0);
218		400
219	av_push (av, sv);	401	av_store (av, i, sv);
220	buf += SvCUR (sv) + 1;	402	buf += SvCUR (sv) + 1;
221	req->result--;	403	}
		404
		405	rv = sv_2mortal (newRV_noinc ((SV *)av));
222	}	406	}
223		407
224	rv = sv_2mortal (newRV_noinc ((SV *)av));	408	PUSHs (rv);
225	}	409	}
		410	break;
226		411
227	PUSHs (rv);	412	case REQ_OPEN:
		413	{
		414	/* convert fd to fh */
		415	SV *fh;
		416
		417	PUSHs (sv_2mortal (newSViv (req->result)));
		418	PUTBACK;
		419	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		420	SPAGAIN;
		421
		422	fh = SvREFCNT_inc (POPs);
		423
		424	PUSHMARK (SP);
		425	XPUSHs (sv_2mortal (fh));
		426	}
		427	break;
		428
		429	case REQ_GROUP:
		430	req->fd = 2; /* mark group as finished */
		431
		432	if (req->data)
		433	{
		434	int i;
		435	AV *av = (AV *)req->data;
		436
		437	EXTEND (SP, AvFILL (av) + 1);
		438	for (i = 0; i <= AvFILL (av); ++i)
		439	PUSHs (*av_fetch (av, i, 0));
		440	}
		441	break;
		442
		443	case REQ_NOP:
		444	case REQ_BUSY:
		445	break;
		446
		447	default:
		448	PUSHs (sv_2mortal (newSViv (req->result)));
		449	break;
228	}	450	}
229	break;
230		451
231	case REQ_OPEN:	452	errno = req->errorno;
232	{
233	/* convert fd to fh */
234	SV *fh;
235		453
236	PUSHs (sv_2mortal (newSViv (req->result)));
237	PUTBACK;	454	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);	455	call_sv (req->callback, G_VOID | G_EVAL);
273	SPAGAIN;	456	SPAGAIN;
274		457
275	FREETMPS;	458	FREETMPS;
276	LEAVE;	459	LEAVE;
277
278	errno = errorno;
279
280	if (SvTRUE (ERRSV))
281	{	460	}
282	req_free (req);
283	croak (0);
284	}
285	}
286		461
287	static void req_free (aio_req req)
288	{
289	if (req->grp)	462	if (req->grp)
290	{	463	{
291	aio_req grp = req->grp;	464	aio_req grp = req->grp;
292		465
293	/* unlink request */	466	/* unlink request */
…		…
298	grp->grp_first = req->grp_next;	471	grp->grp_first = req->grp_next;
299		472
300	aio_grp_dec (grp);	473	aio_grp_dec (grp);
301	}	474	}
302		475
		476	if (SvTRUE (ERRSV))
		477	{
		478	req_free (req);
		479	croak (0);
		480	}
		481	}
		482
		483	static void req_free (aio_req req)
		484	{
303	if (req->self)	485	if (req->self)
304	{	486	{
305	sv_unmagic (req->self, PERL_MAGIC_ext);	487	sv_unmagic (req->self, PERL_MAGIC_ext);
306	SvREFCNT_dec (req->self);	488	SvREFCNT_dec (req->self);
307	}	489	}
…		…
310	SvREFCNT_dec (req->fh);	492	SvREFCNT_dec (req->fh);
311	SvREFCNT_dec (req->fh2);	493	SvREFCNT_dec (req->fh2);
312	SvREFCNT_dec (req->callback);	494	SvREFCNT_dec (req->callback);
313	Safefree (req->statdata);	495	Safefree (req->statdata);
314		496
315	if (req->type == REQ_READDIR && req->result >= 0)	497	if (req->type == REQ_READDIR)
316	free (req->data2ptr);	498	free (req->data2ptr);
317		499
318	Safefree (req);	500	Safefree (req);
319	}	501	}
320		502
		503	static void req_cancel_subs (aio_req grp)
		504	{
		505	aio_req sub;
		506
		507	if (grp->type != REQ_GROUP)
		508	return;
		509
		510	SvREFCNT_dec (grp->fh2);
		511	grp->fh2 = 0;
		512
		513	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		514	req_cancel (sub);
		515	}
		516
321	static void req_cancel (aio_req req)	517	static void req_cancel (aio_req req)
322	{	518	{
323	req->cancelled = 1;	519	req->flags |= FLAG_CANCELLED;
324		520
325	if (req->type == REQ_GROUP)	521	req_cancel_subs (req);
326	{	522	}
327	aio_req sub;
328		523
329	for (sub = req->grp_first; sub; sub = sub->grp_next)	524	static void *aio_proc(void *arg);
330	req_cancel (sub);	525
		526	static void start_thread (void)
		527	{
		528	sigset_t fullsigset, oldsigset;
		529	pthread_attr_t attr;
		530
		531	worker *wrk = calloc (1, sizeof (worker));
		532
		533	if (!wrk)
		534	croak ("unable to allocate worker thread data");
		535
		536	pthread_attr_init (&attr);
		537	pthread_attr_setstacksize (&attr, STACKSIZE);
		538	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		539	#ifdef PTHREAD_SCOPE_PROCESS
		540	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		541	#endif
		542
		543	sigfillset (&fullsigset);
		544
		545	LOCK (wrklock);
		546	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
		547
		548	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
331	}	549	{
332	}	550	wrk->prev = &wrk_first;
		551	wrk->next = wrk_first.next;
		552	wrk_first.next->prev = wrk;
		553	wrk_first.next = wrk;
		554	++started;
		555	}
		556	else
		557	free (wrk);
333		558
		559	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		560	UNLOCK (wrklock);
		561	}
		562
		563	static void maybe_start_thread ()
		564	{
		565	if (started >= wanted)
		566	return;
		567
		568	/* todo: maybe use idle here, but might be less exact */
		569	if ((int)nready <= (int)started - (int)(nreqs - get_nready () - get_npending ()))
		570	return;
		571
		572	start_thread ();
		573	}
		574
		575	static void req_send (aio_req req)
		576	{
		577	++nreqs;
		578
		579	LOCK (reqlock);
		580	++nready;
		581	reqq_push (&req_queue, req);
		582	pthread_cond_signal (&reqwait);
		583	UNLOCK (reqlock);
		584
		585	maybe_start_thread ();
		586	}
		587
		588	static void end_thread (void)
		589	{
		590	aio_req req;
		591
		592	Newz (0, req, 1, aio_cb);
		593
		594	req->type = REQ_QUIT;
		595	req->pri = PRI_MAX + PRI_BIAS;
		596
		597	LOCK (reqlock);
		598	reqq_push (&req_queue, req);
		599	pthread_cond_signal (&reqwait);
		600	UNLOCK (reqlock);
		601
		602	LOCK (wrklock);
		603	--started;
		604	UNLOCK (wrklock);
		605	}
		606
		607	static void min_parallel (int nthreads)
		608	{
		609	if (wanted < nthreads)
		610	wanted = nthreads;
		611	}
		612
		613	static void max_parallel (int nthreads)
		614	{
		615	if (wanted > nthreads)
		616	wanted = nthreads;
		617
		618	while (started > wanted)
		619	end_thread ();
		620	}
		621
		622	static void poll_wait ()
		623	{
		624	fd_set rfd;
		625
		626	while (nreqs)
		627	{
		628	int size;
		629	if (WORDREAD_UNSAFE) LOCK (reslock);
		630	size = res_queue.size;
		631	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		632
		633	if (size)
		634	return;
		635
		636	maybe_start_thread ();
		637
		638	FD_ZERO(&rfd);
		639	FD_SET(respipe [0], &rfd);
		640
		641	select (respipe [0] + 1, &rfd, 0, 0, 0);
		642	}
		643	}
		644
334	static int poll_cb ()	645	static int poll_cb (int max)
335	{	646	{
336	dSP;	647	dSP;
337	int count = 0;	648	int count = 0;
338	int do_croak = 0;	649	int do_croak = 0;
339	aio_req req;	650	aio_req req;
340		651
341	for (;;)	652	for (;;)
342	{	653	{
343	pthread_mutex_lock (&reslock);	654	while (max <= 0 || count < max)
344	req = ress;
345
346	if (req)
347	{	655	{
348	ress = req->next;	656	maybe_start_thread ();
349		657
		658	LOCK (reslock);
		659	req = reqq_shift (&res_queue);
		660
350	if (!ress)	661	if (req)
351	{	662	{
		663	--npending;
		664
		665	if (!res_queue.size)
		666	{
352	/* read any signals sent by the worker threads */	667	/* read any signals sent by the worker threads */
353	char buf [32];	668	char buf [32];
354	while (read (respipe [0], buf, 32) == 32)	669	while (read (respipe [0], buf, 32) == 32)
		670	;
355	;	671	}
356
357	rese = 0;
358	}	672	}
		673
		674	UNLOCK (reslock);
		675
		676	if (!req)
		677	break;
		678
		679	--nreqs;
		680
		681	if (req->type == REQ_GROUP && req->length)
		682	{
		683	req->fd = 1; /* mark request as delayed */
		684	continue;
		685	}
		686	else
		687	{
		688	if (req->type == REQ_READ)
		689	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		690
		691	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		692	SvREADONLY_off (req->data);
		693
		694	if (req->statdata)
		695	{
		696	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		697	PL_laststatval = req->result;
		698	PL_statcache = *(req->statdata);
		699	}
		700
		701	req_invoke (req);
		702
		703	count++;
		704	}
		705
		706	req_free (req);
359	}	707	}
360		708
361	pthread_mutex_unlock (&reslock);	709	if (nreqs <= max_outstanding)
362
363	if (!req)
364	break;	710	break;
365		711
366	--nreqs;	712	poll_wait ();
367		713
368	if (req->type == REQ_QUIT)	714	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	}	715	}
397		716
398	return count;	717	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	}	718	}
490		719
491	static void create_pipe ()	720	static void create_pipe ()
492	{	721	{
493	if (pipe (respipe))	722	if (pipe (respipe))
…		…
517	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	746	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
518	{	747	{
519	ssize_t res;	748	ssize_t res;
520	off_t ooffset;	749	off_t ooffset;
521		750
522	pthread_mutex_lock (&preadwritelock);	751	LOCK (preadwritelock);
523	ooffset = lseek (fd, 0, SEEK_CUR);	752	ooffset = lseek (fd, 0, SEEK_CUR);
524	lseek (fd, offset, SEEK_SET);	753	lseek (fd, offset, SEEK_SET);
525	res = read (fd, buf, count);	754	res = read (fd, buf, count);
526	lseek (fd, ooffset, SEEK_SET);	755	lseek (fd, ooffset, SEEK_SET);
527	pthread_mutex_unlock (&preadwritelock);	756	UNLOCK (preadwritelock);
528		757
529	return res;	758	return res;
530	}	759	}
531		760
532	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	761	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
533	{	762	{
534	ssize_t res;	763	ssize_t res;
535	off_t ooffset;	764	off_t ooffset;
536		765
537	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
538	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
539	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
540	res = write (fd, buf, count);	769	res = write (fd, buf, count);
541	lseek (fd, offset, SEEK_SET);	770	lseek (fd, offset, SEEK_SET);
542	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
543		772
544	return res;	773	return res;
545	}	774	}
546	#endif	775	#endif
547		776
548	#if !HAVE_FDATASYNC	777	#if !HAVE_FDATASYNC
549	# define fdatasync fsync	778	# define fdatasync fsync
550	#endif	779	#endif
551		780
552	#if !HAVE_READAHEAD	781	#if !HAVE_READAHEAD
553	# define readahead aio_readahead	782	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
554		783
555	static ssize_t readahead (int fd, off_t offset, size_t count)	784	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
556	{	785	{
557	char readahead_buf[4096];	786	dBUF;
558		787
559	while (count > 0)	788	while (count > 0)
560	{	789	{
561	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	790	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
562		791
563	pread (fd, readahead_buf, len, offset);	792	pread (fd, aio_buf, len, offset);
564	offset += len;	793	offset += len;
565	count -= len;	794	count -= len;
566	}	795	}
567		796
568	errno = 0;	797	errno = 0;
569	}	798	}
		799
570	#endif	800	#endif
571		801
572	#if !HAVE_READDIR_R	802	#if !HAVE_READDIR_R
573	# define readdir_r aio_readdir_r	803	# define readdir_r aio_readdir_r
574		804
…		…
577	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	807	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
578	{	808	{
579	struct dirent *e;	809	struct dirent *e;
580	int errorno;	810	int errorno;
581		811
582	pthread_mutex_lock (&readdirlock);	812	LOCK (readdirlock);
583		813
584	e = readdir (dirp);	814	e = readdir (dirp);
585	errorno = errno;	815	errorno = errno;
586		816
587	if (e)	817	if (e)
…		…
590	strcpy (ent->d_name, e->d_name);	820	strcpy (ent->d_name, e->d_name);
591	}	821	}
592	else	822	else
593	*res = 0;	823	*res = 0;
594		824
595	pthread_mutex_unlock (&readdirlock);	825	UNLOCK (readdirlock);
596		826
597	errno = errorno;	827	errno = errorno;
598	return e ? 0 : -1;	828	return e ? 0 : -1;
599	}	829	}
600	#endif	830	#endif
601		831
602	/* sendfile always needs emulation */	832	/* sendfile always needs emulation */
603	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	833	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
604	{	834	{
605	ssize_t res;	835	ssize_t res;
606		836
607	if (!count)	837	if (!count)
608	return 0;	838	return 0;
…		…
619	{	849	{
620	off_t sbytes;	850	off_t sbytes;
621	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	851	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
622		852
623	if (res < 0 && sbytes)	853	if (res < 0 && sbytes)
624	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	854	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
625	res = sbytes;	855	res = sbytes;
626	}	856	}
627		857
628	# elif __hpux	858	# elif __hpux
629	res = sendfile (ofd, ifd, offset, count, 0, 0);	859	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
657	#endif	887	#endif
658	)	888	)
659	)	889	)
660	{	890	{
661	/* emulate sendfile. this is a major pain in the ass */	891	/* emulate sendfile. this is a major pain in the ass */
662	char buf[4096];	892	dBUF;
		893
663	res = 0;	894	res = 0;
664		895
665	while (count)	896	while (count)
666	{	897	{
667	ssize_t cnt;	898	ssize_t cnt;
668		899
669	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	900	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
670		901
671	if (cnt <= 0)	902	if (cnt <= 0)
672	{	903	{
673	if (cnt && !res) res = -1;	904	if (cnt && !res) res = -1;
674	break;	905	break;
675	}	906	}
676		907
677	cnt = write (ofd, buf, cnt);	908	cnt = write (ofd, aio_buf, cnt);
678		909
679	if (cnt <= 0)	910	if (cnt <= 0)
680	{	911	{
681	if (cnt && !res) res = -1;	912	if (cnt && !res) res = -1;
682	break;	913	break;
…		…
690		921
691	return res;	922	return res;
692	}	923	}
693		924
694	/* read a full directory */	925	/* read a full directory */
695	static int scandir_ (const char *path, void **namesp)	926	static void scandir_ (aio_req req, worker *self)
696	{	927	{
697	DIR *dirp = opendir (path);	928	DIR *dirp;
698	union	929	union
699	{	930	{
700	struct dirent d;	931	struct dirent d;
701	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	932	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
702	} u;	933	} *u;
703	struct dirent *entp;	934	struct dirent *entp;
704	char *name, *names;	935	char *name, *names;
705	int memlen = 4096;	936	int memlen = 4096;
706	int memofs = 0;	937	int memofs = 0;
707	int res = 0;	938	int res = 0;
708	int errorno;	939	int errorno;
709		940
710	if (!dirp)	941	LOCK (wrklock);
711	return -1;	942	self->dirp = dirp = opendir (req->dataptr);
712		943	self->dbuf = u = malloc (sizeof (*u));
713	names = malloc (memlen);	944	req->data2ptr = names = malloc (memlen);
		945	UNLOCK (wrklock);
		946
		947	if (dirp && u && names)
		948	for (;;)
		949	{
		950	errno = 0;
		951	readdir_r (dirp, &u->d, &entp);
		952
		953	if (!entp)
		954	break;
		955
		956	name = entp->d_name;
		957
		958	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		959	{
		960	int len = strlen (name) + 1;
		961
		962	res++;
		963
		964	while (memofs + len > memlen)
		965	{
		966	memlen *= 2;
		967	LOCK (wrklock);
		968	req->data2ptr = names = realloc (names, memlen);
		969	UNLOCK (wrklock);
		970
		971	if (!names)
		972	break;
		973	}
		974
		975	memcpy (names + memofs, name, len);
		976	memofs += len;
		977	}
		978	}
		979
		980	if (errno)
		981	res = -1;
		982
		983	req->result = res;
		984	}
		985
		986	/*****************************************************************************/
		987
		988	static void *aio_proc (void *thr_arg)
		989	{
		990	aio_req req;
		991	struct timespec ts;
		992	worker *self = (worker *)thr_arg;
		993
		994	/* try to distribute timeouts somewhat evenly */
		995	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		996	* (1000000000UL / 1024UL);
714		997
715	for (;;)	998	for (;;)
716	{	999	{
717	errno = 0, readdir_r (dirp, &u.d, &entp);	1000	ts.tv_sec = time (0) + IDLE_TIMEOUT;
718		1001
719	if (!entp)	1002	LOCK (reqlock);
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		1003
768	for (;;)	1004	for (;;)
769	{	1005	{
770	req = reqs;	1006	self->req = req = reqq_shift (&req_queue);
771
772	if (reqs)
773	{
774	reqs = reqs->next;
775	if (!reqs) reqe = 0;
776	}
777		1007
778	if (req)	1008	if (req)
779	break;	1009	break;
780		1010
		1011	++idle;
		1012
		1013	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
		1014	== ETIMEDOUT)
		1015	{
		1016	if (idle > max_idle)
		1017	{
		1018	--idle;
		1019	UNLOCK (reqlock);
		1020	LOCK (wrklock);
		1021	--started;
		1022	UNLOCK (wrklock);
		1023	goto quit;
		1024	}
		1025
		1026	/* we are allowed to idle, so do so without any timeout */
781	pthread_cond_wait (&reqwait, &reqlock);	1027	pthread_cond_wait (&reqwait, &reqlock);
		1028	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1029	}
		1030
		1031	--idle;
782	}	1032	}
783		1033
784	pthread_mutex_unlock (&reqlock);	1034	--nready;
		1035
		1036	UNLOCK (reqlock);
785		1037
786	errno = 0; /* strictly unnecessary */	1038	errno = 0; /* strictly unnecessary */
787		1039
788	if (!req->cancelled)	1040	if (!(req->flags & FLAG_CANCELLED))
789	switch (type = req->type) /* remember type for QUIT check */	1041	switch (req->type)
790	{	1042	{
791	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1043	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
792	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1044	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
793		1045
794	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1046	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
795	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1047	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
796		1048
797	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1049	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
798	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1050	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
799	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1051	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
800		1052
…		…
803	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1055	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
804	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1056	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
805	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1057	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
806	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1058	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
807	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1059	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1060	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
808		1061
809	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1062	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
810	case REQ_FSYNC: req->result = fsync (req->fd); break;	1063	case REQ_FSYNC: req->result = fsync (req->fd); break;
811	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1064	case REQ_READDIR: scandir_ (req, self); break;
812		1065
813	case REQ_SLEEP:	1066	case REQ_BUSY:
814	{	1067	{
815	struct timeval tv;	1068	struct timeval tv;
816		1069
817	tv.tv_sec = req->fd;	1070	tv.tv_sec = req->fd;
818	tv.tv_usec = req->fd2;	1071	tv.tv_usec = req->fd2;
819		1072
820	req->result = select (0, 0, 0, 0, &tv);	1073	req->result = select (0, 0, 0, 0, &tv);
821	}	1074	}
822		1075
		1076	case REQ_GROUP:
		1077	case REQ_NOP:
		1078	break;
		1079
823	case REQ_QUIT:	1080	case REQ_QUIT:
824	break;	1081	goto quit;
825		1082
826	default:	1083	default:
827	req->result = ENOSYS;	1084	req->result = ENOSYS;
828	break;	1085	break;
829	}	1086	}
830		1087
831	req->errorno = errno;	1088	req->errorno = errno;
832		1089
833	pthread_mutex_lock (&reslock);	1090	LOCK (reslock);
834		1091
835	req->next = 0;	1092	++npending;
836		1093
837	printf ("queue rese %p\n", rese);//D	1094	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 */	1095	/* write a dummy byte to the pipe so fh becomes ready */
848	write (respipe [1], &respipe, 1);	1096	write (respipe [1], &respipe, 1);
849	}
850		1097
851	pthread_mutex_unlock (&reslock);	1098	self->req = 0;
		1099	worker_clear (self);
		1100
		1101	UNLOCK (reslock);
852	}	1102	}
853	while (type != REQ_QUIT);	1103
		1104	quit:
		1105	LOCK (wrklock);
		1106	worker_free (self);
		1107	UNLOCK (wrklock);
854		1108
855	return 0;	1109	return 0;
856	}	1110	}
857		1111
858	/*****************************************************************************/	1112	/*****************************************************************************/
859		1113
860	static void atfork_prepare (void)	1114	static void atfork_prepare (void)
861	{	1115	{
862	pthread_mutex_lock (&reqlock);	1116	LOCK (wrklock);
863	pthread_mutex_lock (&reslock);	1117	LOCK (reqlock);
		1118	LOCK (reslock);
864	#if !HAVE_PREADWRITE	1119	#if !HAVE_PREADWRITE
865	pthread_mutex_lock (&preadwritelock);	1120	LOCK (preadwritelock);
866	#endif	1121	#endif
867	#if !HAVE_READDIR_R	1122	#if !HAVE_READDIR_R
868	pthread_mutex_lock (&readdirlock);	1123	LOCK (readdirlock);
869	#endif	1124	#endif
870	}	1125	}
871		1126
872	static void atfork_parent (void)	1127	static void atfork_parent (void)
873	{	1128	{
874	#if !HAVE_READDIR_R	1129	#if !HAVE_READDIR_R
875	pthread_mutex_unlock (&readdirlock);	1130	UNLOCK (readdirlock);
876	#endif	1131	#endif
877	#if !HAVE_PREADWRITE	1132	#if !HAVE_PREADWRITE
878	pthread_mutex_unlock (&preadwritelock);	1133	UNLOCK (preadwritelock);
879	#endif	1134	#endif
880	pthread_mutex_unlock (&reslock);	1135	UNLOCK (reslock);
881	pthread_mutex_unlock (&reqlock);	1136	UNLOCK (reqlock);
		1137	UNLOCK (wrklock);
882	}	1138	}
883		1139
884	static void atfork_child (void)	1140	static void atfork_child (void)
885	{	1141	{
886	aio_req prv;	1142	aio_req prv;
887		1143
		1144	while (prv = reqq_shift (&req_queue))
		1145	req_free (prv);
		1146
		1147	while (prv = reqq_shift (&res_queue))
		1148	req_free (prv);
		1149
		1150	while (wrk_first.next != &wrk_first)
		1151	{
		1152	worker *wrk = wrk_first.next;
		1153
		1154	if (wrk->req)
		1155	req_free (wrk->req);
		1156
		1157	worker_clear (wrk);
		1158	worker_free (wrk);
		1159	}
		1160
888	started = 0;	1161	started = 0;
889		1162	idle = 0;
890	while (reqs)	1163	nreqs = 0;
891	{	1164	nready = 0;
892	prv = reqs;	1165	npending = 0;
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		1166
908	close (respipe [0]);	1167	close (respipe [0]);
909	close (respipe [1]);	1168	close (respipe [1]);
910	create_pipe ();	1169	create_pipe ();
911		1170
912	atfork_parent ();	1171	atfork_parent ();
913	}	1172	}
914		1173
915	#define dREQ \	1174	#define dREQ \
916	aio_req req; \	1175	aio_req req; \
		1176	int req_pri = next_pri; \
		1177	next_pri = DEFAULT_PRI + PRI_BIAS; \
917	\	1178	\
918	if (SvOK (callback) && !SvROK (callback)) \	1179	if (SvOK (callback) && !SvROK (callback)) \
919	croak ("callback must be undef or of reference type"); \	1180	croak ("callback must be undef or of reference type"); \
920	\	1181	\
921	Newz (0, req, 1, aio_cb); \	1182	Newz (0, req, 1, aio_cb); \
922	if (!req) \	1183	if (!req) \
923	croak ("out of memory during aio_req allocation"); \	1184	croak ("out of memory during aio_req allocation"); \
924	\	1185	\
925	req->callback = newSVsv (callback)	1186	req->callback = newSVsv (callback); \
		1187	req->pri = req_pri
926		1188
927	#define REQ_SEND \	1189	#define REQ_SEND \
928	req_send (req); \	1190	req_send (req); \
929	\	1191	\
930	if (GIMME_V != G_VOID) \	1192	if (GIMME_V != G_VOID) \
…		…
935	PROTOTYPES: ENABLE	1197	PROTOTYPES: ENABLE
936		1198
937	BOOT:	1199	BOOT:
938	{	1200	{
939	HV *stash = gv_stashpv ("IO::AIO", 1);	1201	HV *stash = gv_stashpv ("IO::AIO", 1);
		1202
940	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1203	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
941	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1204	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
942	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1205	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1206	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1207	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1208	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
943		1209
944	create_pipe ();	1210	create_pipe ();
945	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1211	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
946	}	1212	}
947		1213
948	void	1214	void
949	min_parallel (nthreads)	1215	min_parallel (int nthreads)
950	int nthreads
951	PROTOTYPE: $	1216	PROTOTYPE: $
952		1217
953	void	1218	void
954	max_parallel (nthreads)	1219	max_parallel (int nthreads)
955	int nthreads
956	PROTOTYPE: $	1220	PROTOTYPE: $
957		1221
958	int	1222	int
959	max_outstanding (nreqs)	1223	max_outstanding (int maxreqs)
960	int nreqs	1224	PROTOTYPE: $
961	PROTOTYPE: $
962	CODE:	1225	CODE:
963	RETVAL = max_outstanding;	1226	RETVAL = max_outstanding;
964	max_outstanding = nreqs;	1227	max_outstanding = maxreqs;
		1228	OUTPUT:
		1229	RETVAL
965		1230
966	void	1231	void
967	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1232	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
968	SV * pathname	1233	SV * pathname
969	int flags	1234	int flags
…		…
1184		1449
1185	REQ_SEND;	1450	REQ_SEND;
1186	}	1451	}
1187		1452
1188	void	1453	void
		1454	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1455	SV * pathname
		1456	SV * callback
		1457	UV mode
		1458	UV dev
		1459	PPCODE:
		1460	{
		1461	dREQ;
		1462
		1463	req->type = REQ_MKNOD;
		1464	req->data = newSVsv (pathname);
		1465	req->dataptr = SvPVbyte_nolen (req->data);
		1466	req->mode = (mode_t)mode;
		1467	req->offset = dev;
		1468
		1469	REQ_SEND;
		1470	}
		1471
		1472	void
1189	aio_sleep (delay,callback=&PL_sv_undef)	1473	aio_busy (delay,callback=&PL_sv_undef)
1190	double delay	1474	double delay
1191	SV * callback	1475	SV * callback
1192	PPCODE:	1476	PPCODE:
1193	{	1477	{
1194	dREQ;	1478	dREQ;
1195		1479
1196	req->type = REQ_SLEEP;	1480	req->type = REQ_BUSY;
1197	req->fd = delay < 0. ? 0 : delay;	1481	req->fd = delay < 0. ? 0 : delay;
1198	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1482	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1199		1483
1200	REQ_SEND;	1484	REQ_SEND;
1201	}	1485	}
…		…
1205	SV * callback	1489	SV * callback
1206	PROTOTYPE: ;$	1490	PROTOTYPE: ;$
1207	PPCODE:	1491	PPCODE:
1208	{	1492	{
1209	dREQ;	1493	dREQ;
		1494
1210	req->type = REQ_GROUP;	1495	req->type = REQ_GROUP;
1211	req_send (req);	1496	req_send (req);
		1497
1212	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1498	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1213	}	1499	}
		1500
		1501	void
		1502	aio_nop (callback=&PL_sv_undef)
		1503	SV * callback
		1504	PPCODE:
		1505	{
		1506	dREQ;
		1507
		1508	req->type = REQ_NOP;
		1509
		1510	REQ_SEND;
		1511	}
		1512
		1513	int
		1514	aioreq_pri (int pri = 0)
		1515	PROTOTYPE: ;$
		1516	CODE:
		1517	RETVAL = next_pri - PRI_BIAS;
		1518	if (items > 0)
		1519	{
		1520	if (pri < PRI_MIN) pri = PRI_MIN;
		1521	if (pri > PRI_MAX) pri = PRI_MAX;
		1522	next_pri = pri + PRI_BIAS;
		1523	}
		1524	OUTPUT:
		1525	RETVAL
		1526
		1527	void
		1528	aioreq_nice (int nice = 0)
		1529	CODE:
		1530	nice = next_pri - nice;
		1531	if (nice < PRI_MIN) nice = PRI_MIN;
		1532	if (nice > PRI_MAX) nice = PRI_MAX;
		1533	next_pri = nice + PRI_BIAS;
1214		1534
1215	void	1535	void
1216	flush ()	1536	flush ()
1217	PROTOTYPE:	1537	PROTOTYPE:
1218	CODE:	1538	CODE:
1219	while (nreqs)	1539	while (nreqs)
1220	{	1540	{
1221	poll_wait ();	1541	poll_wait ();
1222	poll_cb ();	1542	poll_cb (0);
1223	}	1543	}
1224		1544
1225	void	1545	void
1226	poll()	1546	poll()
1227	PROTOTYPE:	1547	PROTOTYPE:
1228	CODE:	1548	CODE:
1229	if (nreqs)	1549	if (nreqs)
1230	{	1550	{
1231	poll_wait ();	1551	poll_wait ();
1232	poll_cb ();	1552	poll_cb (0);
1233	}	1553	}
1234		1554
1235	int	1555	int
1236	poll_fileno()	1556	poll_fileno()
1237	PROTOTYPE:	1557	PROTOTYPE:
…		…
1242		1562
1243	int	1563	int
1244	poll_cb(...)	1564	poll_cb(...)
1245	PROTOTYPE:	1565	PROTOTYPE:
1246	CODE:	1566	CODE:
1247	RETVAL = poll_cb ();	1567	RETVAL = poll_cb (0);
		1568	OUTPUT:
		1569	RETVAL
		1570
		1571	int
		1572	poll_some(int max = 0)
		1573	PROTOTYPE: $
		1574	CODE:
		1575	RETVAL = poll_cb (max);
1248	OUTPUT:	1576	OUTPUT:
1249	RETVAL	1577	RETVAL
1250		1578
1251	void	1579	void
1252	poll_wait()	1580	poll_wait()
…		…
1261	CODE:	1589	CODE:
1262	RETVAL = nreqs;	1590	RETVAL = nreqs;
1263	OUTPUT:	1591	OUTPUT:
1264	RETVAL	1592	RETVAL
1265		1593
1266	PROTOTYPES: DISABLE	1594	int
1267		1595	nready()
1268	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1269
1270	void
1271	cancel (aio_req_ornot req)
1272	PROTOTYPE:	1596	PROTOTYPE:
1273	CODE:	1597	CODE:
		1598	RETVAL = get_nready ();
		1599	OUTPUT:
		1600	RETVAL
		1601
		1602	int
		1603	npending()
		1604	PROTOTYPE:
		1605	CODE:
		1606	RETVAL = get_npending ();
		1607	OUTPUT:
		1608	RETVAL
		1609
		1610	PROTOTYPES: DISABLE
		1611
		1612	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1613
		1614	void
		1615	cancel (aio_req_ornot req)
		1616	CODE:
1274	req_cancel (req);	1617	req_cancel (req);
		1618
		1619	void
		1620	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1621	CODE:
		1622	SvREFCNT_dec (req->callback);
		1623	req->callback = newSVsv (callback);
1275		1624
1276	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1625	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1277		1626
1278	void	1627	void
1279	add (aio_req grp, ...)	1628	add (aio_req grp, ...)
1280	PPCODE:	1629	PPCODE:
1281	{	1630	{
1282	int i;	1631	int i;
		1632	aio_req req;
1283		1633
1284	if (grp->fd == 2)	1634	if (grp->fd == 2)
1285	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1635	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1286		1636
1287	for (i = 1; i < items; ++i )	1637	for (i = 1; i < items; ++i )
1288	{	1638	{
1289	if (GIMME_V != G_VOID)	1639	if (GIMME_V != G_VOID)
1290	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1640	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1291		1641
1292	aio_req req = SvAIO_REQ (ST (i));	1642	req = SvAIO_REQ (ST (i));
1293		1643
1294	if (req)	1644	if (req)
1295	{	1645	{
1296	++grp->length;	1646	++grp->length;
1297	req->grp = grp;	1647	req->grp = grp;
…		…
1306	}	1656	}
1307	}	1657	}
1308	}	1658	}
1309		1659
1310	void	1660	void
		1661	cancel_subs (aio_req_ornot req)
		1662	CODE:
		1663	req_cancel_subs (req);
		1664
		1665	void
1311	result (aio_req grp, ...)	1666	result (aio_req grp, ...)
1312	CODE:	1667	CODE:
1313	{	1668	{
1314	int i;	1669	int i;
		1670	AV *av;
		1671
		1672	grp->errorno = errno;
		1673
1315	AV *av = newAV ();	1674	av = newAV ();
1316		1675
1317	for (i = 1; i < items; ++i )	1676	for (i = 1; i < items; ++i )
1318	av_push (av, newSVsv (ST (i)));	1677	av_push (av, newSVsv (ST (i)));
1319		1678
1320	SvREFCNT_dec (grp->data);	1679	SvREFCNT_dec (grp->data);
1321	grp->data = (SV *)av;	1680	grp->data = (SV *)av;
1322	}	1681	}
1323		1682
1324	void	1683	void
1325	lock (aio_req grp)	1684	errno (aio_req grp, int errorno = errno)
1326	CODE:	1685	CODE:
1327	++grp->length;	1686	grp->errorno = errorno;
1328		1687
1329	void	1688	void
1330	unlock (aio_req grp)
1331	CODE:
1332	aio_grp_dec (grp);
1333
1334	void
1335	feeder_limit (aio_req grp, int limit)	1689	limit (aio_req grp, int limit)
1336	CODE:	1690	CODE:
1337	grp->fd2 = limit;	1691	grp->fd2 = limit;
1338	aio_grp_feed (grp);	1692	aio_grp_feed (grp);
1339		1693
1340	void	1694	void
1341	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)	1695	feed (aio_req grp, SV *callback=&PL_sv_undef)
1342	CODE:	1696	CODE:
1343	{	1697	{
1344	SvREFCNT_dec (grp->fh2);	1698	SvREFCNT_dec (grp->fh2);
1345	grp->fh2 = newSVsv (callback);	1699	grp->fh2 = newSVsv (callback);
1346		1700

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