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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.47 by root, Sun Oct 22 10:10:23 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 *grp, *grp_prev, *grp_next;
70
71	struct aio_cb *volatile next;	111	struct aio_cb *volatile next;
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);
		298	static void req_invoke (aio_req req);
106	static void req_free (aio_req req);	299	static void req_free (aio_req req);
		300	static void req_cancel (aio_req req);
107		301
108	/* must be called at most once */	302	/* must be called at most once */
109	static SV *req_sv (aio_req req, const char *klass)	303	static SV *req_sv (aio_req req, const char *klass)
110	{	304	{
		305	if (!req->self)
		306	{
111	req->self = (SV *)newHV ();	307	req->self = (SV *)newHV ();
112	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	308	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		309	}
113		310
114	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)));
115	}	312	}
116		313
117	static aio_req SvAIO_REQ (SV *sv)	314	static aio_req SvAIO_REQ (SV *sv)
118	{	315	{
		316	MAGIC *mg;
		317
119	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	318	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
120	croak ("object of class " AIO_REQ_KLASS " expected");	319	croak ("object of class " AIO_REQ_KLASS " expected");
121		320
122	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	321	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
123		322
124	return mg ? (aio_req)mg->mg_ptr : 0;	323	return mg ? (aio_req)mg->mg_ptr : 0;
125	}	324	}
126		325
		326	static void aio_grp_feed (aio_req grp)
		327	{
		328	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		329	{
		330	int old_len = grp->length;
		331
		332	if (grp->fh2 && SvOK (grp->fh2))
		333	{
		334	dSP;
		335
		336	ENTER;
		337	SAVETMPS;
		338	PUSHMARK (SP);
		339	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		340	PUTBACK;
		341	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		342	SPAGAIN;
		343	FREETMPS;
		344	LEAVE;
		345	}
		346
		347	/* stop if no progress has been made */
		348	if (old_len == grp->length)
		349	{
		350	SvREFCNT_dec (grp->fh2);
		351	grp->fh2 = 0;
		352	break;
		353	}
		354	}
		355	}
		356
		357	static void aio_grp_dec (aio_req grp)
		358	{
		359	--grp->length;
		360
		361	/* call feeder, if applicable */
		362	aio_grp_feed (grp);
		363
		364	/* finish, if done */
		365	if (!grp->length && grp->fd)
		366	{
		367	req_invoke (grp);
		368	req_free (grp);
		369	}
		370	}
		371
		372	static void req_invoke (aio_req req)
		373	{
		374	dSP;
		375
		376	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		377	{
		378	ENTER;
		379	SAVETMPS;
		380	PUSHMARK (SP);
		381	EXTEND (SP, 1);
		382
		383	switch (req->type)
		384	{
		385	case REQ_READDIR:
		386	{
		387	SV *rv = &PL_sv_undef;
		388
		389	if (req->result >= 0)
		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	{
		399	SV *sv = newSVpv (buf, 0);
		400
		401	av_store (av, i, sv);
		402	buf += SvCUR (sv) + 1;
		403	}
		404
		405	rv = sv_2mortal (newRV_noinc ((SV *)av));
		406	}
		407
		408	PUSHs (rv);
		409	}
		410	break;
		411
		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;
		450	}
		451
		452	errno = req->errorno;
		453
		454	PUTBACK;
		455	call_sv (req->callback, G_VOID | G_EVAL);
		456	SPAGAIN;
		457
		458	FREETMPS;
		459	LEAVE;
		460	}
		461
		462	if (req->grp)
		463	{
		464	aio_req grp = req->grp;
		465
		466	/* unlink request */
		467	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		468	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		469
		470	if (grp->grp_first == req)
		471	grp->grp_first = req->grp_next;
		472
		473	aio_grp_dec (grp);
		474	}
		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	{
		485	if (req->self)
		486	{
		487	sv_unmagic (req->self, PERL_MAGIC_ext);
		488	SvREFCNT_dec (req->self);
		489	}
		490
		491	SvREFCNT_dec (req->data);
		492	SvREFCNT_dec (req->fh);
		493	SvREFCNT_dec (req->fh2);
		494	SvREFCNT_dec (req->callback);
		495	Safefree (req->statdata);
		496
		497	if (req->type == REQ_READDIR)
		498	free (req->data2ptr);
		499
		500	Safefree (req);
		501	}
		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
		517	static void req_cancel (aio_req req)
		518	{
		519	req->flags |= FLAG_CANCELLED;
		520
		521	req_cancel_subs (req);
		522	}
		523
		524	static void *aio_proc(void *arg);
		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)
		549	{
		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);
		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
127	static void poll_wait ()	622	static void poll_wait ()
128	{	623	{
129	if (nreqs && !ress)
130	{
131	fd_set rfd;	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
132	FD_ZERO(&rfd);	638	FD_ZERO(&rfd);
133	FD_SET(respipe [0], &rfd);	639	FD_SET(respipe [0], &rfd);
134		640
135	select (respipe [0] + 1, &rfd, 0, 0, 0);	641	select (respipe [0] + 1, &rfd, 0, 0, 0);
136	}	642	}
137	}	643	}
138		644
139	static void req_invoke (aio_req req)
140	{
141	dSP;
142	int errorno = errno;
143
144	if (req->cancelled || !SvOK (req->callback))
145	return;
146
147	errno = req->errorno;
148
149	ENTER;
150	PUSHMARK (SP);
151
152	switch (req->type)
153	{
154	case REQ_READDIR:
155	{
156	SV *rv = &PL_sv_undef;
157
158	if (req->result >= 0)
159	{
160	char *buf = req->data2ptr;
161	AV *av = newAV ();
162
163	while (req->result)
164	{
165	SV *sv = newSVpv (buf, 0);
166
167	av_push (av, sv);
168	buf += SvCUR (sv) + 1;
169	req->result--;
170	}
171
172	rv = sv_2mortal (newRV_noinc ((SV *)av));
173	}
174
175	XPUSHs (rv);
176	}
177	break;
178
179	case REQ_OPEN:
180	{
181	/* convert fd to fh */
182	SV *fh;
183
184	XPUSHs (sv_2mortal (newSViv (req->result)));
185	PUTBACK;
186	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
187	SPAGAIN;
188
189	fh = SvREFCNT_inc (POPs);
190
191	PUSHMARK (SP);
192	XPUSHs (sv_2mortal (fh));
193	}
194	break;
195
196	case REQ_SLEEP:
197	case REQ_GROUP:
198	break;
199
200	default:
201	XPUSHs (sv_2mortal (newSViv (req->result)));
202	break;
203	}
204
205
206	PUTBACK;
207	call_sv (req->callback, G_VOID | G_EVAL);
208	SPAGAIN;
209
210	if (SvTRUE (ERRSV))
211	{
212	req_free (req);
213	croak (0);
214	}
215
216	LEAVE;
217
218	errno = errorno;
219	}
220
221	static void req_free (aio_req req)
222	{
223	if (req->grp)
224	{
225	aio_req grp = req->grp;
226
227	/* unlink request */
228	req->grp_next->grp_prev = req->grp_prev;
229	req->grp_prev->grp_next = req->grp_next;
230
231	if (grp->grp_next == grp && grp->fd)
232	{
233	req_invoke (grp);
234	req_free (grp);
235	}
236	}
237
238	if (req->self)
239	{
240	sv_unmagic (req->self, PERL_MAGIC_ext);
241	SvREFCNT_dec (req->self);
242	}
243
244	if (req->data)
245	SvREFCNT_dec (req->data);
246
247	if (req->fh)
248	SvREFCNT_dec (req->fh);
249
250	if (req->fh2)
251	SvREFCNT_dec (req->fh2);
252
253	if (req->statdata)
254	Safefree (req->statdata);
255
256	if (req->callback)
257	SvREFCNT_dec (req->callback);
258
259	if (req->type == REQ_READDIR && req->result >= 0)
260	free (req->data2ptr);
261
262	Safefree (req);
263	}
264
265	static void req_cancel (aio_req req)
266	{
267	req->cancelled = 1;
268
269	if (req->type == REQ_GROUP)
270	{
271	aio_req sub;
272
273	for (sub = req->grp_next; sub != req; sub = sub->grp_next)
274	req_cancel (sub);
275	}
276	}
277
278	static int poll_cb ()	645	static int poll_cb (int max)
279	{	646	{
280	dSP;	647	dSP;
281	int count = 0;	648	int count = 0;
282	int do_croak = 0;	649	int do_croak = 0;
283	aio_req req;	650	aio_req req;
284		651
285	for (;;)	652	for (;;)
286	{	653	{
287	pthread_mutex_lock (&reslock);	654	while (max <= 0 || count < max)
288	req = ress;
289
290	if (req)
291	{	655	{
292	ress = req->next;	656	maybe_start_thread ();
293		657
		658	LOCK (reslock);
		659	req = reqq_shift (&res_queue);
		660
294	if (!ress)	661	if (req)
295	{	662	{
		663	--npending;
		664
		665	if (!res_queue.size)
		666	{
296	/* read any signals sent by the worker threads */	667	/* read any signals sent by the worker threads */
297	char buf [32];	668	char buf [32];
298	while (read (respipe [0], buf, 32) == 32)	669	while (read (respipe [0], buf, 32) == 32)
		670	;
299	;	671	}
300
301	rese = 0;
302	}	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);
303	}	707	}
304		708
305	pthread_mutex_unlock (&reslock);	709	if (nreqs <= max_outstanding)
306
307	if (!req)
308	break;	710	break;
309		711
310	nreqs--;	712	poll_wait ();
311		713
312	if (req->type == REQ_QUIT)	714	max = 0;
313	started--;
314	else if (req->type == REQ_GROUP && req->grp_next != req)
315	{
316	req->fd = 1; /* mark request as delayed */
317	continue;
318	}
319	else
320	{
321	if (req->type == REQ_READ)
322	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
323
324	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
325	SvREADONLY_off (req->data);
326
327	if (req->statdata)
328	{
329	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
330	PL_laststatval = req->result;
331	PL_statcache = *(req->statdata);
332	}
333
334	req_invoke (req);
335
336	count++;
337	}
338
339	req_free (req);
340	}	715	}
341		716
342	return count;	717	return count;
343	}
344
345	static void *aio_proc(void *arg);
346
347	static void start_thread (void)
348	{
349	sigset_t fullsigset, oldsigset;
350	pthread_t tid;
351	pthread_attr_t attr;
352
353	pthread_attr_init (&attr);
354	pthread_attr_setstacksize (&attr, STACKSIZE);
355	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
356
357	sigfillset (&fullsigset);
358	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
359
360	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
361	started++;
362
363	sigprocmask (SIG_SETMASK, &oldsigset, 0);
364	}
365
366	static void req_send (aio_req req)
367	{
368	while (started < wanted && nreqs >= started)
369	start_thread ();
370
371	nreqs++;
372
373	pthread_mutex_lock (&reqlock);
374
375	req->next = 0;
376
377	if (reqe)
378	{
379	reqe->next = req;
380	reqe = req;
381	}
382	else
383	reqe = reqs = req;
384
385	pthread_cond_signal (&reqwait);
386	pthread_mutex_unlock (&reqlock);
387
388	if (nreqs > max_outstanding)
389	for (;;)
390	{
391	poll_cb ();
392
393	if (nreqs <= max_outstanding)
394	break;
395
396	poll_wait ();
397	}
398	}
399
400	static void end_thread (void)
401	{
402	aio_req req;
403	Newz (0, req, 1, aio_cb);
404	req->type = REQ_QUIT;
405
406	req_send (req);
407	}
408
409	static void min_parallel (int nthreads)
410	{
411	if (wanted < nthreads)
412	wanted = nthreads;
413	}
414
415	static void max_parallel (int nthreads)
416	{
417	int cur = started;
418
419	if (wanted > nthreads)
420	wanted = nthreads;
421
422	while (cur > wanted)
423	{
424	end_thread ();
425	cur--;
426	}
427
428	while (started > wanted)
429	{
430	poll_wait ();
431	poll_cb ();
432	}
433	}	718	}
434		719
435	static void create_pipe ()	720	static void create_pipe ()
436	{	721	{
437	if (pipe (respipe))	722	if (pipe (respipe))
…		…
461	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)
462	{	747	{
463	ssize_t res;	748	ssize_t res;
464	off_t ooffset;	749	off_t ooffset;
465		750
466	pthread_mutex_lock (&preadwritelock);	751	LOCK (preadwritelock);
467	ooffset = lseek (fd, 0, SEEK_CUR);	752	ooffset = lseek (fd, 0, SEEK_CUR);
468	lseek (fd, offset, SEEK_SET);	753	lseek (fd, offset, SEEK_SET);
469	res = read (fd, buf, count);	754	res = read (fd, buf, count);
470	lseek (fd, ooffset, SEEK_SET);	755	lseek (fd, ooffset, SEEK_SET);
471	pthread_mutex_unlock (&preadwritelock);	756	UNLOCK (preadwritelock);
472		757
473	return res;	758	return res;
474	}	759	}
475		760
476	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)
477	{	762	{
478	ssize_t res;	763	ssize_t res;
479	off_t ooffset;	764	off_t ooffset;
480		765
481	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
482	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
483	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
484	res = write (fd, buf, count);	769	res = write (fd, buf, count);
485	lseek (fd, offset, SEEK_SET);	770	lseek (fd, offset, SEEK_SET);
486	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
487		772
488	return res;	773	return res;
489	}	774	}
490	#endif	775	#endif
491		776
492	#if !HAVE_FDATASYNC	777	#if !HAVE_FDATASYNC
493	# define fdatasync fsync	778	# define fdatasync fsync
494	#endif	779	#endif
495		780
496	#if !HAVE_READAHEAD	781	#if !HAVE_READAHEAD
497	# define readahead aio_readahead	782	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
498		783
499	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)
500	{	785	{
501	char readahead_buf[4096];	786	dBUF;
502		787
503	while (count > 0)	788	while (count > 0)
504	{	789	{
505	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	790	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
506		791
507	pread (fd, readahead_buf, len, offset);	792	pread (fd, aio_buf, len, offset);
508	offset += len;	793	offset += len;
509	count -= len;	794	count -= len;
510	}	795	}
511		796
512	errno = 0;	797	errno = 0;
513	}	798	}
		799
514	#endif	800	#endif
515		801
516	#if !HAVE_READDIR_R	802	#if !HAVE_READDIR_R
517	# define readdir_r aio_readdir_r	803	# define readdir_r aio_readdir_r
518		804
…		…
521	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)
522	{	808	{
523	struct dirent *e;	809	struct dirent *e;
524	int errorno;	810	int errorno;
525		811
526	pthread_mutex_lock (&readdirlock);	812	LOCK (readdirlock);
527		813
528	e = readdir (dirp);	814	e = readdir (dirp);
529	errorno = errno;	815	errorno = errno;
530		816
531	if (e)	817	if (e)
…		…
534	strcpy (ent->d_name, e->d_name);	820	strcpy (ent->d_name, e->d_name);
535	}	821	}
536	else	822	else
537	*res = 0;	823	*res = 0;
538		824
539	pthread_mutex_unlock (&readdirlock);	825	UNLOCK (readdirlock);
540		826
541	errno = errorno;	827	errno = errorno;
542	return e ? 0 : -1;	828	return e ? 0 : -1;
543	}	829	}
544	#endif	830	#endif
545		831
546	/* sendfile always needs emulation */	832	/* sendfile always needs emulation */
547	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)
548	{	834	{
549	ssize_t res;	835	ssize_t res;
550		836
551	if (!count)	837	if (!count)
552	return 0;	838	return 0;
…		…
563	{	849	{
564	off_t sbytes;	850	off_t sbytes;
565	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	851	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
566		852
567	if (res < 0 && sbytes)	853	if (res < 0 && sbytes)
568	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	854	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
569	res = sbytes;	855	res = sbytes;
570	}	856	}
571		857
572	# elif __hpux	858	# elif __hpux
573	res = sendfile (ofd, ifd, offset, count, 0, 0);	859	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
601	#endif	887	#endif
602	)	888	)
603	)	889	)
604	{	890	{
605	/* emulate sendfile. this is a major pain in the ass */	891	/* emulate sendfile. this is a major pain in the ass */
606	char buf[4096];	892	dBUF;
		893
607	res = 0;	894	res = 0;
608		895
609	while (count)	896	while (count)
610	{	897	{
611	ssize_t cnt;	898	ssize_t cnt;
612		899
613	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	900	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
614		901
615	if (cnt <= 0)	902	if (cnt <= 0)
616	{	903	{
617	if (cnt && !res) res = -1;	904	if (cnt && !res) res = -1;
618	break;	905	break;
619	}	906	}
620		907
621	cnt = write (ofd, buf, cnt);	908	cnt = write (ofd, aio_buf, cnt);
622		909
623	if (cnt <= 0)	910	if (cnt <= 0)
624	{	911	{
625	if (cnt && !res) res = -1;	912	if (cnt && !res) res = -1;
626	break;	913	break;
…		…
634		921
635	return res;	922	return res;
636	}	923	}
637		924
638	/* read a full directory */	925	/* read a full directory */
639	static int scandir_ (const char *path, void **namesp)	926	static void scandir_ (aio_req req, worker *self)
640	{	927	{
641	DIR *dirp = opendir (path);	928	DIR *dirp;
642	union	929	union
643	{	930	{
644	struct dirent d;	931	struct dirent d;
645	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	932	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
646	} u;	933	} *u;
647	struct dirent *entp;	934	struct dirent *entp;
648	char *name, *names;	935	char *name, *names;
649	int memlen = 4096;	936	int memlen = 4096;
650	int memofs = 0;	937	int memofs = 0;
651	int res = 0;	938	int res = 0;
652	int errorno;	939	int errorno;
653		940
654	if (!dirp)	941	LOCK (wrklock);
655	return -1;	942	self->dirp = dirp = opendir (req->dataptr);
656		943	self->dbuf = u = malloc (sizeof (*u));
657	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);
658		997
659	for (;;)	998	for (;;)
660	{	999	{
661	errno = 0, readdir_r (dirp, &u.d, &entp);	1000	ts.tv_sec = time (0) + IDLE_TIMEOUT;
662		1001
663	if (!entp)	1002	LOCK (reqlock);
664	break;
665
666	name = entp->d_name;
667
668	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
669	{
670	int len = strlen (name) + 1;
671
672	res++;
673
674	while (memofs + len > memlen)
675	{
676	memlen *= 2;
677	names = realloc (names, memlen);
678	if (!names)
679	break;
680	}
681
682	memcpy (names + memofs, name, len);
683	memofs += len;
684	}
685	}
686
687	errorno = errno;
688	closedir (dirp);
689
690	if (errorno)
691	{
692	free (names);
693	errno = errorno;
694	res = -1;
695	}
696
697	*namesp = (void *)names;
698	return res;
699	}
700
701	/*****************************************************************************/
702
703	static void *aio_proc (void *thr_arg)
704	{
705	aio_req req;
706	int type;
707
708	do
709	{
710	pthread_mutex_lock (&reqlock);
711		1003
712	for (;;)	1004	for (;;)
713	{	1005	{
714	req = reqs;	1006	self->req = req = reqq_shift (&req_queue);
715
716	if (reqs)
717	{
718	reqs = reqs->next;
719	if (!reqs) reqe = 0;
720	}
721		1007
722	if (req)	1008	if (req)
723	break;	1009	break;
724		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 */
725	pthread_cond_wait (&reqwait, &reqlock);	1027	pthread_cond_wait (&reqwait, &reqlock);
		1028	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1029	}
		1030
		1031	--idle;
726	}	1032	}
727		1033
728	pthread_mutex_unlock (&reqlock);	1034	--nready;
		1035
		1036	UNLOCK (reqlock);
729		1037
730	errno = 0; /* strictly unnecessary */	1038	errno = 0; /* strictly unnecessary */
731		1039
732	if (!req->cancelled)	1040	if (!(req->flags & FLAG_CANCELLED))
733	switch (req->type)	1041	switch (req->type)
734	{	1042	{
735	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;
736	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;
737		1045
738	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;
739	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;
740		1048
741	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1049	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
742	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1050	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
743	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1051	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
744		1052
…		…
747	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1055	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
748	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1056	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
749	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1057	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
750	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1058	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
751	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;
752		1061
753	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1062	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
754	case REQ_FSYNC: req->result = fsync (req->fd); break;	1063	case REQ_FSYNC: req->result = fsync (req->fd); break;
755	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1064	case REQ_READDIR: scandir_ (req, self); break;
756		1065
757	case REQ_SLEEP:	1066	case REQ_BUSY:
758	{	1067	{
759	struct timeval tv;	1068	struct timeval tv;
760		1069
761	tv.tv_sec = req->fd;	1070	tv.tv_sec = req->fd;
762	tv.tv_usec = req->fd2;	1071	tv.tv_usec = req->fd2;
763		1072
764	req->result = select (0, 0, 0, 0, &tv);	1073	req->result = select (0, 0, 0, 0, &tv);
765	}	1074	}
766		1075
		1076	case REQ_GROUP:
		1077	case REQ_NOP:
		1078	break;
		1079
767	case REQ_QUIT:	1080	case REQ_QUIT:
768	break;	1081	goto quit;
769		1082
770	default:	1083	default:
771	req->result = ENOSYS;	1084	req->result = ENOSYS;
772	break;	1085	break;
773	}	1086	}
774		1087
775	req->errorno = errno;	1088	req->errorno = errno;
776		1089
777	pthread_mutex_lock (&reslock);	1090	LOCK (reslock);
778		1091
779	req->next = 0;	1092	++npending;
780		1093
781	if (rese)	1094	if (!reqq_push (&res_queue, req))
782	{
783	rese->next = req;
784	rese = req;
785	}
786	else
787	{
788	rese = ress = req;
789
790	/* write a dummy byte to the pipe so fh becomes ready */	1095	/* write a dummy byte to the pipe so fh becomes ready */
791	write (respipe [1], &respipe, 1);	1096	write (respipe [1], &respipe, 1);
792	}
793		1097
794	pthread_mutex_unlock (&reslock);	1098	self->req = 0;
		1099	worker_clear (self);
		1100
		1101	UNLOCK (reslock);
795	}	1102	}
796	while (type != REQ_QUIT);	1103
		1104	quit:
		1105	LOCK (wrklock);
		1106	worker_free (self);
		1107	UNLOCK (wrklock);
797		1108
798	return 0;	1109	return 0;
799	}	1110	}
800		1111
801	/*****************************************************************************/	1112	/*****************************************************************************/
802		1113
803	static void atfork_prepare (void)	1114	static void atfork_prepare (void)
804	{	1115	{
805	pthread_mutex_lock (&reqlock);	1116	LOCK (wrklock);
806	pthread_mutex_lock (&reslock);	1117	LOCK (reqlock);
		1118	LOCK (reslock);
807	#if !HAVE_PREADWRITE	1119	#if !HAVE_PREADWRITE
808	pthread_mutex_lock (&preadwritelock);	1120	LOCK (preadwritelock);
809	#endif	1121	#endif
810	#if !HAVE_READDIR_R	1122	#if !HAVE_READDIR_R
811	pthread_mutex_lock (&readdirlock);	1123	LOCK (readdirlock);
812	#endif	1124	#endif
813	}	1125	}
814		1126
815	static void atfork_parent (void)	1127	static void atfork_parent (void)
816	{	1128	{
817	#if !HAVE_READDIR_R	1129	#if !HAVE_READDIR_R
818	pthread_mutex_unlock (&readdirlock);	1130	UNLOCK (readdirlock);
819	#endif	1131	#endif
820	#if !HAVE_PREADWRITE	1132	#if !HAVE_PREADWRITE
821	pthread_mutex_unlock (&preadwritelock);	1133	UNLOCK (preadwritelock);
822	#endif	1134	#endif
823	pthread_mutex_unlock (&reslock);	1135	UNLOCK (reslock);
824	pthread_mutex_unlock (&reqlock);	1136	UNLOCK (reqlock);
		1137	UNLOCK (wrklock);
825	}	1138	}
826		1139
827	static void atfork_child (void)	1140	static void atfork_child (void)
828	{	1141	{
829	aio_req prv;	1142	aio_req prv;
830		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
831	started = 0;	1161	started = 0;
832		1162	idle = 0;
833	while (reqs)	1163	nreqs = 0;
834	{	1164	nready = 0;
835	prv = reqs;	1165	npending = 0;
836	reqs = prv->next;
837	req_free (prv);
838	}
839
840	reqs = reqe = 0;
841
842	while (ress)
843	{
844	prv = ress;
845	ress = prv->next;
846	req_free (prv);
847	}
848
849	ress = rese = 0;
850		1166
851	close (respipe [0]);	1167	close (respipe [0]);
852	close (respipe [1]);	1168	close (respipe [1]);
853	create_pipe ();	1169	create_pipe ();
854		1170
855	atfork_parent ();	1171	atfork_parent ();
856	}	1172	}
857		1173
858	#define dREQ \	1174	#define dREQ \
859	aio_req req; \	1175	aio_req req; \
		1176	int req_pri = next_pri; \
		1177	next_pri = DEFAULT_PRI + PRI_BIAS; \
860	\	1178	\
861	if (SvOK (callback) && !SvROK (callback)) \	1179	if (SvOK (callback) && !SvROK (callback)) \
862	croak ("callback must be undef or of reference type"); \	1180	croak ("callback must be undef or of reference type"); \
863	\	1181	\
864	Newz (0, req, 1, aio_cb); \	1182	Newz (0, req, 1, aio_cb); \
865	if (!req) \	1183	if (!req) \
866	croak ("out of memory during aio_req allocation"); \	1184	croak ("out of memory during aio_req allocation"); \
867	\	1185	\
868	req->callback = newSVsv (callback)	1186	req->callback = newSVsv (callback); \
		1187	req->pri = req_pri
869		1188
870	#define REQ_SEND \	1189	#define REQ_SEND \
871	req_send (req); \	1190	req_send (req); \
872	\	1191	\
873	if (GIMME_V != G_VOID) \	1192	if (GIMME_V != G_VOID) \
…		…
878	PROTOTYPES: ENABLE	1197	PROTOTYPES: ENABLE
879		1198
880	BOOT:	1199	BOOT:
881	{	1200	{
882	HV *stash = gv_stashpv ("IO::AIO", 1);	1201	HV *stash = gv_stashpv ("IO::AIO", 1);
		1202
883	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1203	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
884	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1204	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
885	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));
886		1209
887	create_pipe ();	1210	create_pipe ();
888	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1211	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
889	}	1212	}
890		1213
891	void	1214	void
892	min_parallel (nthreads)	1215	min_parallel (int nthreads)
893	int nthreads
894	PROTOTYPE: $	1216	PROTOTYPE: $
895		1217
896	void	1218	void
897	max_parallel (nthreads)	1219	max_parallel (int nthreads)
898	int nthreads
899	PROTOTYPE: $	1220	PROTOTYPE: $
900		1221
901	int	1222	int
902	max_outstanding (nreqs)	1223	max_outstanding (int maxreqs)
903	int nreqs	1224	PROTOTYPE: $
904	PROTOTYPE: $
905	CODE:	1225	CODE:
906	RETVAL = max_outstanding;	1226	RETVAL = max_outstanding;
907	max_outstanding = nreqs;	1227	max_outstanding = maxreqs;
		1228	OUTPUT:
		1229	RETVAL
908		1230
909	void	1231	void
910	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1232	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
911	SV * pathname	1233	SV * pathname
912	int flags	1234	int flags
…		…
1127		1449
1128	REQ_SEND;	1450	REQ_SEND;
1129	}	1451	}
1130		1452
1131	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
1132	aio_sleep (delay,callback=&PL_sv_undef)	1473	aio_busy (delay,callback=&PL_sv_undef)
1133	double delay	1474	double delay
1134	SV * callback	1475	SV * callback
1135	PPCODE:	1476	PPCODE:
1136	{	1477	{
1137	dREQ;	1478	dREQ;
1138		1479
1139	req->type = REQ_SLEEP;	1480	req->type = REQ_BUSY;
1140	req->fd = delay < 0. ? 0 : delay;	1481	req->fd = delay < 0. ? 0 : delay;
1141	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1482	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1142		1483
1143	REQ_SEND;	1484	REQ_SEND;
1144	}	1485	}
…		…
1148	SV * callback	1489	SV * callback
1149	PROTOTYPE: ;$	1490	PROTOTYPE: ;$
1150	PPCODE:	1491	PPCODE:
1151	{	1492	{
1152	dREQ;	1493	dREQ;
		1494
1153	req->type = REQ_GROUP;	1495	req->type = REQ_GROUP;
1154	req->grp_next = req;
1155	req->grp_prev = req;
1156
1157	req_send (req);	1496	req_send (req);
		1497
1158	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1498	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1159	}	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;
1160		1534
1161	void	1535	void
1162	flush ()	1536	flush ()
1163	PROTOTYPE:	1537	PROTOTYPE:
1164	CODE:	1538	CODE:
1165	while (nreqs)	1539	while (nreqs)
1166	{	1540	{
1167	poll_wait ();	1541	poll_wait ();
1168	poll_cb ();	1542	poll_cb (0);
1169	}	1543	}
1170		1544
1171	void	1545	void
1172	poll()	1546	poll()
1173	PROTOTYPE:	1547	PROTOTYPE:
1174	CODE:	1548	CODE:
1175	if (nreqs)	1549	if (nreqs)
1176	{	1550	{
1177	poll_wait ();	1551	poll_wait ();
1178	poll_cb ();	1552	poll_cb (0);
1179	}	1553	}
1180		1554
1181	int	1555	int
1182	poll_fileno()	1556	poll_fileno()
1183	PROTOTYPE:	1557	PROTOTYPE:
…		…
1188		1562
1189	int	1563	int
1190	poll_cb(...)	1564	poll_cb(...)
1191	PROTOTYPE:	1565	PROTOTYPE:
1192	CODE:	1566	CODE:
1193	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);
1194	OUTPUT:	1576	OUTPUT:
1195	RETVAL	1577	RETVAL
1196		1578
1197	void	1579	void
1198	poll_wait()	1580	poll_wait()
…		…
1207	CODE:	1589	CODE:
1208	RETVAL = nreqs;	1590	RETVAL = nreqs;
1209	OUTPUT:	1591	OUTPUT:
1210	RETVAL	1592	RETVAL
1211		1593
1212	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1594	int
1213		1595	nready()
1214	void
1215	cancel (aio_req_ornot req)
1216	PROTOTYPE:	1596	PROTOTYPE:
1217	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:
1218	req_cancel (req);	1617	req_cancel (req);
1219		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);
		1624
1220	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1625	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1221		1626
1222	void	1627	void
1223	add (aio_req grp, ...)	1628	add (aio_req grp, ...)
1224	PROTOTYPE: $;@
1225	PPCODE:	1629	PPCODE:
1226	{	1630	{
1227	int i;	1631	int i;
		1632	aio_req req;
		1633
		1634	if (grp->fd == 2)
		1635	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1228		1636
1229	for (i = 1; i < items; ++i )	1637	for (i = 1; i < items; ++i )
1230	{	1638	{
1231	if (GIMME_V != G_VOID)	1639	if (GIMME_V != G_VOID)
1232	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1640	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1233		1641
1234	aio_req req = SvAIO_REQ (ST (i));	1642	req = SvAIO_REQ (ST (i));
1235		1643
1236	if (req)	1644	if (req)
1237	{	1645	{
1238	req->grp_prev = grp;	1646	++grp->length;
1239	req->grp_next = grp->grp_next;
1240	grp->grp_next->grp_prev = req;
1241	grp->grp_next = req;
1242
1243	req->grp = grp;	1647	req->grp = grp;
		1648
		1649	req->grp_prev = 0;
		1650	req->grp_next = grp->grp_first;
		1651
		1652	if (grp->grp_first)
		1653	grp->grp_first->grp_prev = req;
		1654
		1655	grp->grp_first = req;
1244	}	1656	}
1245	}	1657	}
1246	}	1658	}
1247		1659
		1660	void
		1661	cancel_subs (aio_req_ornot req)
		1662	CODE:
		1663	req_cancel_subs (req);
		1664
		1665	void
		1666	result (aio_req grp, ...)
		1667	CODE:
		1668	{
		1669	int i;
		1670	AV *av;
		1671
		1672	grp->errorno = errno;
		1673
		1674	av = newAV ();
		1675
		1676	for (i = 1; i < items; ++i )
		1677	av_push (av, newSVsv (ST (i)));
		1678
		1679	SvREFCNT_dec (grp->data);
		1680	grp->data = (SV *)av;
		1681	}
		1682
		1683	void
		1684	errno (aio_req grp, int errorno = errno)
		1685	CODE:
		1686	grp->errorno = errorno;
		1687
		1688	void
		1689	limit (aio_req grp, int limit)
		1690	CODE:
		1691	grp->fd2 = limit;
		1692	aio_grp_feed (grp);
		1693
		1694	void
		1695	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1696	CODE:
		1697	{
		1698	SvREFCNT_dec (grp->fh2);
		1699	grp->fh2 = newSVsv (callback);
		1700
		1701	if (grp->fd2 <= 0)
		1702	grp->fd2 = 2;
		1703
		1704	aio_grp_feed (grp);
		1705	}
		1706

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