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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.46 by root, Sun Oct 22 00:49:29 2006 UTC vs.
Revision 1.83 by root, Sat Oct 28 00:17:30 2006 UTC

		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
		5	# define _GNU_SOURCE
		6	#endif
		7
		8	/* just in case */
1	#define _REENTRANT 1	9	#define _REENTRANT 1
		10
2	#include <errno.h>	11	#include <errno.h>
3		12
4	#include "EXTERN.h"	13	#include "EXTERN.h"
5	#include "perl.h"	14	#include "perl.h"
6	#include "XSUB.h"	15	#include "XSUB.h"
…		…
39	/* used for struct dirent, AIX doesn't provide it */	48	/* used for struct dirent, AIX doesn't provide it */
40	#ifndef NAME_MAX	49	#ifndef NAME_MAX
41	# define NAME_MAX 4096	50	# define NAME_MAX 4096
42	#endif	51	#endif
43		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
		57
44	#if __ia64	58	#if __ia64
45	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
46	#else	62	#else
47	# define STACKSIZE 8192	63	# define STACKSIZE 16384
		64	#endif
		65
		66	/* wether word reads are potentially non-atomic.
		67	* this is conservatice, likely most arches this runs
		68	* on have atomic word read/writes.
		69	*/
		70	#ifndef WORDREAD_UNSAFE
		71	# if __i386 || __x86_64
		72	# define WORDREAD_UNSAFE 0
		73	# else
		74	# define WORDREAD_UNSAFE 1
48	#endif	75	# endif
		76	#endif
		77
		78	/* buffer size for various temporary buffers */
		79	#define AIO_BUFSIZE 65536
		80
		81	#define dBUF \
		82	char *aio_buf; \
		83	LOCK (wrklock); \
		84	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		85	UNLOCK (wrklock); \
		86	if (!aio_buf) \
		87	return -1;
49		88
50	enum {	89	enum {
51	REQ_QUIT,	90	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,	93	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,	97	REQ_MKNOD, REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,	98	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,	99	REQ_GROUP, REQ_NOP,
61	REQ_GROUP,	100	REQ_BUSY,
62	};	101	};
63		102
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	103	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	104	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		105
67	typedef struct aio_cb	106	typedef struct aio_cb
68	{	107	{
69	struct aio_cb *grp, *grp_prev, *grp_next;
70
71	struct aio_cb *volatile next;	108	struct aio_cb *volatile next;
72
73	SV *self; /* the perl counterpart of this request, if any */
74		109
75	SV *data, *callback;	110	SV *data, *callback;
76	SV *fh, *fh2;	111	SV *fh, *fh2;
77	void *dataptr, *data2ptr;	112	void *dataptr, *data2ptr;
78	Stat_t *statdata;	113	Stat_t *statdata;
79	off_t offset;	114	off_t offset;
80	size_t length;	115	size_t length;
81	ssize_t result;	116	ssize_t result;
82		117
		118	STRLEN dataoffset;
83	int type;	119	int type;
84	int fd, fd2;	120	int fd, fd2;
85	int errorno;	121	int errorno;
86	STRLEN dataoffset;
87	mode_t mode; /* open */	122	mode_t mode; /* open */
		123
88	unsigned char cancelled;	124	unsigned char flags;
		125	unsigned char pri;
		126
		127	SV *self; /* the perl counterpart of this request, if any */
		128	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
89	} aio_cb;	129	} aio_cb;
		130
		131	enum {
		132	FLAG_CANCELLED = 0x01,
		133	};
90		134
91	typedef aio_cb *aio_req;	135	typedef aio_cb *aio_req;
92	typedef aio_cb *aio_req_ornot;	136	typedef aio_cb *aio_req_ornot;
93		137
		138	enum {
		139	PRI_MIN = -4,
		140	PRI_MAX = 4,
		141
		142	DEFAULT_PRI = 0,
		143	PRI_BIAS = -PRI_MIN,
		144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		145	};
		146
		147	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		148
94	static int started, wanted;	149	static unsigned int started, wanted;
95	static volatile int nreqs;	150
96	static int max_outstanding = 1<<30;	151	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		152	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		153	#else
		154	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		155	#endif
		156
		157	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		158	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		159
		160	/* worker threads management */
		161	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		162
		163	typedef struct worker {
		164	/* locked by wrklock */
		165	struct worker *prev, *next;
		166
		167	pthread_t tid;
		168
		169	/* locked by reslock, reqlock or wrklock */
		170	aio_req req; /* currently processed request */
		171	void *dbuf;
		172	DIR *dirp;
		173	} worker;
		174
		175	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		176
		177	static void worker_clear (worker *wrk)
		178	{
		179	if (wrk->dirp)
		180	{
		181	closedir (wrk->dirp);
		182	wrk->dirp = 0;
		183	}
		184
		185	if (wrk->dbuf)
		186	{
		187	free (wrk->dbuf);
		188	wrk->dbuf = 0;
		189	}
		190	}
		191
		192	static void worker_free (worker *wrk)
		193	{
		194	wrk->next->prev = wrk->prev;
		195	wrk->prev->next = wrk->next;
		196
		197	free (wrk);
		198	}
		199
		200	static volatile unsigned int nreqs, nready, npending;
		201	static volatile unsigned int max_outstanding = 0xffffffff;
97	static int respipe [2];	202	static int respipe [2];
98		203
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		207
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	208	#if WORDREAD_UNSAFE
104	static volatile aio_req ress, rese; /* queue start, queue end */
105		209
		210	static unsigned int get_nready ()
		211	{
		212	unsigned int retval;
		213
		214	LOCK (reqlock);
		215	retval = nready;
		216	UNLOCK (reqlock);
		217
		218	return retval;
		219	}
		220
		221	static unsigned int get_npending ()
		222	{
		223	unsigned int retval;
		224
		225	LOCK (reslock);
		226	retval = npending;
		227	UNLOCK (reslock);
		228
		229	return retval;
		230	}
		231
		232	#else
		233
		234	# define get_nready() nready
		235	# define get_npending() npending
		236
		237	#endif
		238
		239	/*
		240	* a somewhat faster data structure might be nice, but
		241	* with 8 priorities this actually needs <20 insns
		242	* per shift, the most expensive operation.
		243	*/
		244	typedef struct {
		245	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		246	int size;
		247	} reqq;
		248
		249	static reqq req_queue;
		250	static reqq res_queue;
		251
		252	int reqq_push (reqq *q, aio_req req)
		253	{
		254	int pri = req->pri;
		255	req->next = 0;
		256
		257	if (q->qe[pri])
		258	{
		259	q->qe[pri]->next = req;
		260	q->qe[pri] = req;
		261	}
		262	else
		263	q->qe[pri] = q->qs[pri] = req;
		264
		265	return q->size++;
		266	}
		267
		268	aio_req reqq_shift (reqq *q)
		269	{
		270	int pri;
		271
		272	if (!q->size)
		273	return 0;
		274
		275	--q->size;
		276
		277	for (pri = NUM_PRI; pri--; )
		278	{
		279	aio_req req = q->qs[pri];
		280
		281	if (req)
		282	{
		283	if (!(q->qs[pri] = req->next))
		284	q->qe[pri] = 0;
		285
		286	return req;
		287	}
		288	}
		289
		290	abort ();
		291	}
		292
		293	static int poll_cb (int max);
		294	static void req_invoke (aio_req req);
106	static void req_free (aio_req req);	295	static void req_free (aio_req req);
		296	static void req_cancel (aio_req req);
107		297
108	/* must be called at most once */	298	/* must be called at most once */
109	static SV *req_sv (aio_req req, const char *klass)	299	static SV *req_sv (aio_req req, const char *klass)
110	{	300	{
		301	if (!req->self)
		302	{
111	req->self = (SV *)newHV ();	303	req->self = (SV *)newHV ();
112	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	304	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		305	}
113		306
114	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	307	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
115	}	308	}
116		309
117	static aio_req SvAIO_REQ (SV *sv)	310	static aio_req SvAIO_REQ (SV *sv)
118	{	311	{
		312	MAGIC *mg;
		313
119	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	314	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
120	croak ("object of class " AIO_REQ_KLASS " expected");	315	croak ("object of class " AIO_REQ_KLASS " expected");
121		316
122	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	317	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
123		318
124	return mg ? (aio_req)mg->mg_ptr : 0;	319	return mg ? (aio_req)mg->mg_ptr : 0;
125	}	320	}
126		321
		322	static void aio_grp_feed (aio_req grp)
		323	{
		324	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		325	{
		326	int old_len = grp->length;
		327
		328	if (grp->fh2 && SvOK (grp->fh2))
		329	{
		330	dSP;
		331
		332	ENTER;
		333	SAVETMPS;
		334	PUSHMARK (SP);
		335	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		336	PUTBACK;
		337	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		338	SPAGAIN;
		339	FREETMPS;
		340	LEAVE;
		341	}
		342
		343	/* stop if no progress has been made */
		344	if (old_len == grp->length)
		345	{
		346	SvREFCNT_dec (grp->fh2);
		347	grp->fh2 = 0;
		348	break;
		349	}
		350	}
		351	}
		352
		353	static void aio_grp_dec (aio_req grp)
		354	{
		355	--grp->length;
		356
		357	/* call feeder, if applicable */
		358	aio_grp_feed (grp);
		359
		360	/* finish, if done */
		361	if (!grp->length && grp->fd)
		362	{
		363	req_invoke (grp);
		364	req_free (grp);
		365	}
		366	}
		367
		368	static void req_invoke (aio_req req)
		369	{
		370	dSP;
		371
		372	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		373	{
		374	ENTER;
		375	SAVETMPS;
		376	PUSHMARK (SP);
		377	EXTEND (SP, 1);
		378
		379	switch (req->type)
		380	{
		381	case REQ_READDIR:
		382	{
		383	SV *rv = &PL_sv_undef;
		384
		385	if (req->result >= 0)
		386	{
		387	int i;
		388	char *buf = req->data2ptr;
		389	AV *av = newAV ();
		390
		391	av_extend (av, req->result - 1);
		392
		393	for (i = 0; i < req->result; ++i)
		394	{
		395	SV *sv = newSVpv (buf, 0);
		396
		397	av_store (av, i, sv);
		398	buf += SvCUR (sv) + 1;
		399	}
		400
		401	rv = sv_2mortal (newRV_noinc ((SV *)av));
		402	}
		403
		404	PUSHs (rv);
		405	}
		406	break;
		407
		408	case REQ_OPEN:
		409	{
		410	/* convert fd to fh */
		411	SV *fh;
		412
		413	PUSHs (sv_2mortal (newSViv (req->result)));
		414	PUTBACK;
		415	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		416	SPAGAIN;
		417
		418	fh = SvREFCNT_inc (POPs);
		419
		420	PUSHMARK (SP);
		421	XPUSHs (sv_2mortal (fh));
		422	}
		423	break;
		424
		425	case REQ_GROUP:
		426	req->fd = 2; /* mark group as finished */
		427
		428	if (req->data)
		429	{
		430	int i;
		431	AV *av = (AV *)req->data;
		432
		433	EXTEND (SP, AvFILL (av) + 1);
		434	for (i = 0; i <= AvFILL (av); ++i)
		435	PUSHs (*av_fetch (av, i, 0));
		436	}
		437	break;
		438
		439	case REQ_NOP:
		440	case REQ_BUSY:
		441	break;
		442
		443	default:
		444	PUSHs (sv_2mortal (newSViv (req->result)));
		445	break;
		446	}
		447
		448	errno = req->errorno;
		449
		450	PUTBACK;
		451	call_sv (req->callback, G_VOID | G_EVAL);
		452	SPAGAIN;
		453
		454	FREETMPS;
		455	LEAVE;
		456	}
		457
		458	if (req->grp)
		459	{
		460	aio_req grp = req->grp;
		461
		462	/* unlink request */
		463	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		464	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		465
		466	if (grp->grp_first == req)
		467	grp->grp_first = req->grp_next;
		468
		469	aio_grp_dec (grp);
		470	}
		471
		472	if (SvTRUE (ERRSV))
		473	{
		474	req_free (req);
		475	croak (0);
		476	}
		477	}
		478
		479	static void req_free (aio_req req)
		480	{
		481	if (req->self)
		482	{
		483	sv_unmagic (req->self, PERL_MAGIC_ext);
		484	SvREFCNT_dec (req->self);
		485	}
		486
		487	SvREFCNT_dec (req->data);
		488	SvREFCNT_dec (req->fh);
		489	SvREFCNT_dec (req->fh2);
		490	SvREFCNT_dec (req->callback);
		491	Safefree (req->statdata);
		492
		493	if (req->type == REQ_READDIR)
		494	free (req->data2ptr);
		495
		496	Safefree (req);
		497	}
		498
		499	static void req_cancel_subs (aio_req grp)
		500	{
		501	aio_req sub;
		502
		503	if (grp->type != REQ_GROUP)
		504	return;
		505
		506	SvREFCNT_dec (grp->fh2);
		507	grp->fh2 = 0;
		508
		509	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		510	req_cancel (sub);
		511	}
		512
		513	static void req_cancel (aio_req req)
		514	{
		515	req->flags |= FLAG_CANCELLED;
		516
		517	req_cancel_subs (req);
		518	}
		519
		520	static void *aio_proc(void *arg);
		521
		522	static void start_thread (void)
		523	{
		524	sigset_t fullsigset, oldsigset;
		525	pthread_attr_t attr;
		526
		527	worker *wrk = calloc (1, sizeof (worker));
		528
		529	if (!wrk)
		530	croak ("unable to allocate worker thread data");
		531
		532	pthread_attr_init (&attr);
		533	pthread_attr_setstacksize (&attr, STACKSIZE);
		534	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		535	#ifdef PTHREAD_SCOPE_PROCESS
		536	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		537	#endif
		538
		539	sigfillset (&fullsigset);
		540
		541	LOCK (wrklock);
		542	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
		543
		544	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		545	{
		546	wrk->prev = &wrk_first;
		547	wrk->next = wrk_first.next;
		548	wrk_first.next->prev = wrk;
		549	wrk_first.next = wrk;
		550	++started;
		551	}
		552	else
		553	free (wrk);
		554
		555	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		556	UNLOCK (wrklock);
		557	}
		558
		559	static void maybe_start_thread ()
		560	{
		561	#if 0
		562	static struct timeval last;
		563	struct timeval diff, now;
		564	#endif
		565
		566	if (started >= wanted)
		567	return;
		568
		569	if (nready <= nreqs - get_nready () - get_npending ())
		570	return;
		571
		572	#if 0
		573	gettimeofday (&now, 0);
		574
		575	diff.tv_sec = now.tv_sec - last.tv_sec;
		576	diff.tv_usec = now.tv_usec - last.tv_usec;
		577
		578	if (diff.tv_usec < 0)
		579	{
		580	--diff.tv_sec;
		581	diff.tv_usec += 1000000;
		582	}
		583
		584	if (!diff.tv_sec && diff.tv_usec < 10000)
		585	return;
		586
		587	last = now;
		588	#endif
		589
		590	start_thread ();
		591	}
		592
		593	static void req_send (aio_req req)
		594	{
		595	++nreqs;
		596
		597	LOCK (reqlock);
		598	++nready;
		599	reqq_push (&req_queue, req);
		600	pthread_cond_signal (&reqwait);
		601	UNLOCK (reqlock);
		602
		603	maybe_start_thread ();
		604	}
		605
		606	static void end_thread (void)
		607	{
		608	aio_req req;
		609
		610	Newz (0, req, 1, aio_cb);
		611
		612	req->type = REQ_QUIT;
		613	req->pri = PRI_MAX + PRI_BIAS;
		614
		615	LOCK (reqlock);
		616	reqq_push (&req_queue, req);
		617	pthread_cond_signal (&reqwait);
		618	UNLOCK (reqlock);
		619
		620	LOCK (wrklock);
		621	--started;
		622	UNLOCK (wrklock);
		623	}
		624
		625	static void min_parallel (int nthreads)
		626	{
		627	if (wanted < nthreads)
		628	wanted = nthreads;
		629	}
		630
		631	static void max_parallel (int nthreads)
		632	{
		633	if (wanted > nthreads)
		634	wanted = nthreads;
		635
		636	while (started > wanted)
		637	end_thread ();
		638	}
		639
127	static void poll_wait ()	640	static void poll_wait ()
128	{	641	{
129	if (nreqs && !ress)
130	{
131	fd_set rfd;	642	fd_set rfd;
		643
		644	while (nreqs)
		645	{
		646	int size;
		647	if (WORDREAD_UNSAFE) LOCK (reslock);
		648	size = res_queue.size;
		649	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		650
		651	if (size)
		652	return;
		653
		654	maybe_start_thread ();
		655
132	FD_ZERO(&rfd);	656	FD_ZERO(&rfd);
133	FD_SET(respipe [0], &rfd);	657	FD_SET(respipe [0], &rfd);
134		658
135	select (respipe [0] + 1, &rfd, 0, 0, 0);	659	select (respipe [0] + 1, &rfd, 0, 0, 0);
136	}	660	}
137	}	661	}
138		662
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 ()	663	static int poll_cb (int max)
279	{	664	{
280	dSP;	665	dSP;
281	int count = 0;	666	int count = 0;
282	int do_croak = 0;	667	int do_croak = 0;
283	aio_req req;	668	aio_req req;
284		669
285	for (;;)	670	for (;;)
286	{	671	{
287	pthread_mutex_lock (&reslock);	672	while (max <= 0 || count < max)
288	req = ress;
289
290	if (req)
291	{	673	{
292	ress = req->next;	674	maybe_start_thread ();
293		675
		676	LOCK (reslock);
		677	req = reqq_shift (&res_queue);
		678
294	if (!ress)	679	if (req)
295	{	680	{
		681	--npending;
		682
		683	if (!res_queue.size)
		684	{
296	/* read any signals sent by the worker threads */	685	/* read any signals sent by the worker threads */
297	char buf [32];	686	char buf [32];
298	while (read (respipe [0], buf, 32) == 32)	687	while (read (respipe [0], buf, 32) == 32)
		688	;
299	;	689	}
300
301	rese = 0;
302	}	690	}
		691
		692	UNLOCK (reslock);
		693
		694	if (!req)
		695	break;
		696
		697	--nreqs;
		698
		699	if (req->type == REQ_GROUP && req->length)
		700	{
		701	req->fd = 1; /* mark request as delayed */
		702	continue;
		703	}
		704	else
		705	{
		706	if (req->type == REQ_READ)
		707	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		708
		709	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		710	SvREADONLY_off (req->data);
		711
		712	if (req->statdata)
		713	{
		714	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		715	PL_laststatval = req->result;
		716	PL_statcache = *(req->statdata);
		717	}
		718
		719	req_invoke (req);
		720
		721	count++;
		722	}
		723
		724	req_free (req);
303	}	725	}
304		726
305	pthread_mutex_unlock (&reslock);	727	if (nreqs <= max_outstanding)
306
307	if (!req)
308	break;	728	break;
309		729
310	nreqs--;	730	poll_wait ();
311		731
312	if (req->type == REQ_QUIT)	732	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	}	733	}
341		734
342	return count;	735	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	}	736	}
434		737
435	static void create_pipe ()	738	static void create_pipe ()
436	{	739	{
437	if (pipe (respipe))	740	if (pipe (respipe))
…		…
461	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	764	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
462	{	765	{
463	ssize_t res;	766	ssize_t res;
464	off_t ooffset;	767	off_t ooffset;
465		768
466	pthread_mutex_lock (&preadwritelock);	769	LOCK (preadwritelock);
467	ooffset = lseek (fd, 0, SEEK_CUR);	770	ooffset = lseek (fd, 0, SEEK_CUR);
468	lseek (fd, offset, SEEK_SET);	771	lseek (fd, offset, SEEK_SET);
469	res = read (fd, buf, count);	772	res = read (fd, buf, count);
470	lseek (fd, ooffset, SEEK_SET);	773	lseek (fd, ooffset, SEEK_SET);
471	pthread_mutex_unlock (&preadwritelock);	774	UNLOCK (preadwritelock);
472		775
473	return res;	776	return res;
474	}	777	}
475		778
476	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	779	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
477	{	780	{
478	ssize_t res;	781	ssize_t res;
479	off_t ooffset;	782	off_t ooffset;
480		783
481	pthread_mutex_lock (&preadwritelock);	784	LOCK (preadwritelock);
482	ooffset = lseek (fd, 0, SEEK_CUR);	785	ooffset = lseek (fd, 0, SEEK_CUR);
483	lseek (fd, offset, SEEK_SET);	786	lseek (fd, offset, SEEK_SET);
484	res = write (fd, buf, count);	787	res = write (fd, buf, count);
485	lseek (fd, offset, SEEK_SET);	788	lseek (fd, offset, SEEK_SET);
486	pthread_mutex_unlock (&preadwritelock);	789	UNLOCK (preadwritelock);
487		790
488	return res;	791	return res;
489	}	792	}
490	#endif	793	#endif
491		794
492	#if !HAVE_FDATASYNC	795	#if !HAVE_FDATASYNC
493	# define fdatasync fsync	796	# define fdatasync fsync
494	#endif	797	#endif
495		798
496	#if !HAVE_READAHEAD	799	#if !HAVE_READAHEAD
497	# define readahead aio_readahead	800	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
498		801
499	static ssize_t readahead (int fd, off_t offset, size_t count)	802	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
500	{	803	{
501	char readahead_buf[4096];	804	dBUF;
502		805
503	while (count > 0)	806	while (count > 0)
504	{	807	{
505	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	808	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
506		809
507	pread (fd, readahead_buf, len, offset);	810	pread (fd, aio_buf, len, offset);
508	offset += len;	811	offset += len;
509	count -= len;	812	count -= len;
510	}	813	}
511		814
512	errno = 0;	815	errno = 0;
513	}	816	}
		817
514	#endif	818	#endif
515		819
516	#if !HAVE_READDIR_R	820	#if !HAVE_READDIR_R
517	# define readdir_r aio_readdir_r	821	# define readdir_r aio_readdir_r
518		822
…		…
521	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	825	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
522	{	826	{
523	struct dirent *e;	827	struct dirent *e;
524	int errorno;	828	int errorno;
525		829
526	pthread_mutex_lock (&readdirlock);	830	LOCK (readdirlock);
527		831
528	e = readdir (dirp);	832	e = readdir (dirp);
529	errorno = errno;	833	errorno = errno;
530		834
531	if (e)	835	if (e)
…		…
534	strcpy (ent->d_name, e->d_name);	838	strcpy (ent->d_name, e->d_name);
535	}	839	}
536	else	840	else
537	*res = 0;	841	*res = 0;
538		842
539	pthread_mutex_unlock (&readdirlock);	843	UNLOCK (readdirlock);
540		844
541	errno = errorno;	845	errno = errorno;
542	return e ? 0 : -1;	846	return e ? 0 : -1;
543	}	847	}
544	#endif	848	#endif
545		849
546	/* sendfile always needs emulation */	850	/* sendfile always needs emulation */
547	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	851	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
548	{	852	{
549	ssize_t res;	853	ssize_t res;
550		854
551	if (!count)	855	if (!count)
552	return 0;	856	return 0;
…		…
563	{	867	{
564	off_t sbytes;	868	off_t sbytes;
565	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	869	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
566		870
567	if (res < 0 && sbytes)	871	if (res < 0 && sbytes)
568	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	872	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
569	res = sbytes;	873	res = sbytes;
570	}	874	}
571		875
572	# elif __hpux	876	# elif __hpux
573	res = sendfile (ofd, ifd, offset, count, 0, 0);	877	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
601	#endif	905	#endif
602	)	906	)
603	)	907	)
604	{	908	{
605	/* emulate sendfile. this is a major pain in the ass */	909	/* emulate sendfile. this is a major pain in the ass */
606	char buf[4096];	910	dBUF;
		911
607	res = 0;	912	res = 0;
608		913
609	while (count)	914	while (count)
610	{	915	{
611	ssize_t cnt;	916	ssize_t cnt;
612		917
613	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	918	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
614		919
615	if (cnt <= 0)	920	if (cnt <= 0)
616	{	921	{
617	if (cnt && !res) res = -1;	922	if (cnt && !res) res = -1;
618	break;	923	break;
619	}	924	}
620		925
621	cnt = write (ofd, buf, cnt);	926	cnt = write (ofd, aio_buf, cnt);
622		927
623	if (cnt <= 0)	928	if (cnt <= 0)
624	{	929	{
625	if (cnt && !res) res = -1;	930	if (cnt && !res) res = -1;
626	break;	931	break;
…		…
634		939
635	return res;	940	return res;
636	}	941	}
637		942
638	/* read a full directory */	943	/* read a full directory */
639	static int scandir_ (const char *path, void **namesp)	944	static void scandir_ (aio_req req, worker *self)
640	{	945	{
641	DIR *dirp = opendir (path);	946	DIR *dirp;
642	union	947	union
643	{	948	{
644	struct dirent d;	949	struct dirent d;
645	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	950	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
646	} u;	951	} *u;
647	struct dirent *entp;	952	struct dirent *entp;
648	char *name, *names;	953	char *name, *names;
649	int memlen = 4096;	954	int memlen = 4096;
650	int memofs = 0;	955	int memofs = 0;
651	int res = 0;	956	int res = 0;
652	int errorno;	957	int errorno;
653		958
654	if (!dirp)	959	LOCK (wrklock);
655	return -1;	960	self->dirp = dirp = opendir (req->dataptr);
656		961	self->dbuf = u = malloc (sizeof (*u));
657	names = malloc (memlen);	962	req->data2ptr = names = malloc (memlen);
		963	UNLOCK (wrklock);
		964
		965	if (dirp && u && names)
		966	for (;;)
		967	{
		968	errno = 0;
		969	readdir_r (dirp, &u->d, &entp);
		970
		971	if (!entp)
		972	break;
		973
		974	name = entp->d_name;
		975
		976	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		977	{
		978	int len = strlen (name) + 1;
		979
		980	res++;
		981
		982	while (memofs + len > memlen)
		983	{
		984	memlen *= 2;
		985	LOCK (wrklock);
		986	req->data2ptr = names = realloc (names, memlen);
		987	UNLOCK (wrklock);
		988
		989	if (!names)
		990	break;
		991	}
		992
		993	memcpy (names + memofs, name, len);
		994	memofs += len;
		995	}
		996	}
		997
		998	if (errno)
		999	res = -1;
		1000
		1001	req->result = res;
		1002	}
		1003
		1004	/*****************************************************************************/
		1005
		1006	static void *aio_proc (void *thr_arg)
		1007	{
		1008	aio_req req;
		1009	worker *self = (worker *)thr_arg;
658		1010
659	for (;;)	1011	for (;;)
660	{	1012	{
661	errno = 0, readdir_r (dirp, &u.d, &entp);	1013	LOCK (reqlock);
662
663	if (!entp)
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		1014
712	for (;;)	1015	for (;;)
713	{	1016	{
714	req = reqs;	1017	self->req = req = reqq_shift (&req_queue);
715
716	if (reqs)
717	{
718	reqs = reqs->next;
719	if (!reqs) reqe = 0;
720	}
721		1018
722	if (req)	1019	if (req)
723	break;	1020	break;
724		1021
725	pthread_cond_wait (&reqwait, &reqlock);	1022	pthread_cond_wait (&reqwait, &reqlock);
726	}	1023	}
727		1024
728	pthread_mutex_unlock (&reqlock);	1025	--nready;
		1026
		1027	UNLOCK (reqlock);
729		1028
730	errno = 0; /* strictly unnecessary */	1029	errno = 0; /* strictly unnecessary */
731		1030
732	if (!req->cancelled)	1031	if (!(req->flags & FLAG_CANCELLED))
733	switch (req->type)	1032	switch (req->type)
734	{	1033	{
735	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1034	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;	1035	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
737		1036
738	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1037	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;	1038	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
740		1039
741	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1040	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
742	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1041	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
743	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1042	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
744		1043
…		…
747	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1046	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
748	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1047	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
749	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1048	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
750	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1049	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
751	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1050	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1051	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
752		1052
753	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1053	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
754	case REQ_FSYNC: req->result = fsync (req->fd); break;	1054	case REQ_FSYNC: req->result = fsync (req->fd); break;
755	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1055	case REQ_READDIR: scandir_ (req, self); break;
756		1056
757	case REQ_SLEEP:	1057	case REQ_BUSY:
758	{	1058	{
759	struct timeval tv;	1059	struct timeval tv;
760		1060
761	tv.tv_sec = req->fd;	1061	tv.tv_sec = req->fd;
762	tv.tv_usec = req->fd2;	1062	tv.tv_usec = req->fd2;
763		1063
764	req->result = select (0, 0, 0, 0, &tv);	1064	req->result = select (0, 0, 0, 0, &tv);
765	}	1065	}
766		1066
		1067	case REQ_GROUP:
		1068	case REQ_NOP:
		1069	break;
		1070
767	case REQ_QUIT:	1071	case REQ_QUIT:
		1072	LOCK (wrklock);
		1073	worker_free (self);
		1074	--started;
		1075	UNLOCK (wrklock);
768	break;	1076	return 0;
769		1077
770	default:	1078	default:
771	req->result = ENOSYS;	1079	req->result = ENOSYS;
772	break;	1080	break;
773	}	1081	}
774		1082
775	req->errorno = errno;	1083	req->errorno = errno;
776		1084
777	pthread_mutex_lock (&reslock);	1085	LOCK (reslock);
778		1086
779	req->next = 0;	1087	++npending;
780		1088
781	if (rese)	1089	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 */	1090	/* write a dummy byte to the pipe so fh becomes ready */
791	write (respipe [1], &respipe, 1);	1091	write (respipe [1], &respipe, 1);
792	}
793		1092
794	pthread_mutex_unlock (&reslock);	1093	self->req = 0;
795	}	1094	worker_clear (self);
796	while (type != REQ_QUIT);
797		1095
798	return 0;	1096	UNLOCK (reslock);
		1097	}
799	}	1098	}
800		1099
801	/*****************************************************************************/	1100	/*****************************************************************************/
802		1101
803	static void atfork_prepare (void)	1102	static void atfork_prepare (void)
804	{	1103	{
805	pthread_mutex_lock (&reqlock);	1104	LOCK (wrklock);
806	pthread_mutex_lock (&reslock);	1105	LOCK (reqlock);
		1106	LOCK (reslock);
807	#if !HAVE_PREADWRITE	1107	#if !HAVE_PREADWRITE
808	pthread_mutex_lock (&preadwritelock);	1108	LOCK (preadwritelock);
809	#endif	1109	#endif
810	#if !HAVE_READDIR_R	1110	#if !HAVE_READDIR_R
811	pthread_mutex_lock (&readdirlock);	1111	LOCK (readdirlock);
812	#endif	1112	#endif
813	}	1113	}
814		1114
815	static void atfork_parent (void)	1115	static void atfork_parent (void)
816	{	1116	{
817	#if !HAVE_READDIR_R	1117	#if !HAVE_READDIR_R
818	pthread_mutex_unlock (&readdirlock);	1118	UNLOCK (readdirlock);
819	#endif	1119	#endif
820	#if !HAVE_PREADWRITE	1120	#if !HAVE_PREADWRITE
821	pthread_mutex_unlock (&preadwritelock);	1121	UNLOCK (preadwritelock);
822	#endif	1122	#endif
823	pthread_mutex_unlock (&reslock);	1123	UNLOCK (reslock);
824	pthread_mutex_unlock (&reqlock);	1124	UNLOCK (reqlock);
		1125	UNLOCK (wrklock);
825	}	1126	}
826		1127
827	static void atfork_child (void)	1128	static void atfork_child (void)
828	{	1129	{
829	aio_req prv;	1130	aio_req prv;
830		1131
		1132	while (prv = reqq_shift (&req_queue))
		1133	req_free (prv);
		1134
		1135	while (prv = reqq_shift (&res_queue))
		1136	req_free (prv);
		1137
		1138	while (wrk_first.next != &wrk_first)
		1139	{
		1140	worker *wrk = wrk_first.next;
		1141
		1142	if (wrk->req)
		1143	req_free (wrk->req);
		1144
		1145	worker_clear (wrk);
		1146	worker_free (wrk);
		1147	}
		1148
831	started = 0;	1149	started = 0;
832		1150	nreqs = 0;
833	while (reqs)
834	{
835	prv = reqs;
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		1151
851	close (respipe [0]);	1152	close (respipe [0]);
852	close (respipe [1]);	1153	close (respipe [1]);
853	create_pipe ();	1154	create_pipe ();
854		1155
855	atfork_parent ();	1156	atfork_parent ();
856	}	1157	}
857		1158
858	#define dREQ \	1159	#define dREQ \
859	aio_req req; \	1160	aio_req req; \
		1161	int req_pri = next_pri; \
		1162	next_pri = DEFAULT_PRI + PRI_BIAS; \
860	\	1163	\
861	if (SvOK (callback) && !SvROK (callback)) \	1164	if (SvOK (callback) && !SvROK (callback)) \
862	croak ("callback must be undef or of reference type"); \	1165	croak ("callback must be undef or of reference type"); \
863	\	1166	\
864	Newz (0, req, 1, aio_cb); \	1167	Newz (0, req, 1, aio_cb); \
865	if (!req) \	1168	if (!req) \
866	croak ("out of memory during aio_req allocation"); \	1169	croak ("out of memory during aio_req allocation"); \
867	\	1170	\
868	req->callback = newSVsv (callback)	1171	req->callback = newSVsv (callback); \
		1172	req->pri = req_pri
869		1173
870	#define REQ_SEND \	1174	#define REQ_SEND \
871	req_send (req); \	1175	req_send (req); \
872	\	1176	\
873	if (GIMME_V != G_VOID) \	1177	if (GIMME_V != G_VOID) \
…		…
878	PROTOTYPES: ENABLE	1182	PROTOTYPES: ENABLE
879		1183
880	BOOT:	1184	BOOT:
881	{	1185	{
882	HV *stash = gv_stashpv ("IO::AIO", 1);	1186	HV *stash = gv_stashpv ("IO::AIO", 1);
		1187
883	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1188	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
884	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1189	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
885	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1190	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1191	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1192	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1193	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
886		1194
887	create_pipe ();	1195	create_pipe ();
888	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1196	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
889	}
890		1197
		1198	start_thread ();
		1199	}
		1200
891	void	1201	void
892	min_parallel (nthreads)	1202	min_parallel (int nthreads)
893	int nthreads
894	PROTOTYPE: $	1203	PROTOTYPE: $
895		1204
896	void	1205	void
897	max_parallel (nthreads)	1206	max_parallel (int nthreads)
898	int nthreads
899	PROTOTYPE: $	1207	PROTOTYPE: $
900		1208
901	int	1209	int
902	max_outstanding (nreqs)	1210	max_outstanding (int maxreqs)
903	int nreqs	1211	PROTOTYPE: $
904	PROTOTYPE: $
905	CODE:	1212	CODE:
906	RETVAL = max_outstanding;	1213	RETVAL = max_outstanding;
907	max_outstanding = nreqs;	1214	max_outstanding = maxreqs;
		1215	OUTPUT:
		1216	RETVAL
908		1217
909	void	1218	void
910	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1219	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
911	SV * pathname	1220	SV * pathname
912	int flags	1221	int flags
…		…
1127		1436
1128	REQ_SEND;	1437	REQ_SEND;
1129	}	1438	}
1130		1439
1131	void	1440	void
		1441	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1442	SV * pathname
		1443	SV * callback
		1444	UV mode
		1445	UV dev
		1446	PPCODE:
		1447	{
		1448	dREQ;
		1449
		1450	req->type = REQ_MKNOD;
		1451	req->data = newSVsv (pathname);
		1452	req->dataptr = SvPVbyte_nolen (req->data);
		1453	req->mode = (mode_t)mode;
		1454	req->offset = dev;
		1455
		1456	REQ_SEND;
		1457	}
		1458
		1459	void
1132	aio_sleep (delay,callback=&PL_sv_undef)	1460	aio_busy (delay,callback=&PL_sv_undef)
1133	double delay	1461	double delay
1134	SV * callback	1462	SV * callback
1135	PPCODE:	1463	PPCODE:
1136	{	1464	{
1137	dREQ;	1465	dREQ;
1138		1466
1139	req->type = REQ_SLEEP;	1467	req->type = REQ_BUSY;
1140	req->fd = delay < 0. ? 0 : delay;	1468	req->fd = delay < 0. ? 0 : delay;
1141	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1469	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1142		1470
1143	REQ_SEND;	1471	REQ_SEND;
1144	}	1472	}
…		…
1148	SV * callback	1476	SV * callback
1149	PROTOTYPE: ;$	1477	PROTOTYPE: ;$
1150	PPCODE:	1478	PPCODE:
1151	{	1479	{
1152	dREQ;	1480	dREQ;
		1481
1153	req->type = REQ_GROUP;	1482	req->type = REQ_GROUP;
1154	req->grp_next = req;
1155	req->grp_prev = req;
1156
1157	req_send (req);	1483	req_send (req);
		1484
1158	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1485	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1159	}	1486	}
		1487
		1488	void
		1489	aio_nop (callback=&PL_sv_undef)
		1490	SV * callback
		1491	PPCODE:
		1492	{
		1493	dREQ;
		1494
		1495	req->type = REQ_NOP;
		1496
		1497	REQ_SEND;
		1498	}
		1499
		1500	int
		1501	aioreq_pri (int pri = 0)
		1502	PROTOTYPE: ;$
		1503	CODE:
		1504	RETVAL = next_pri - PRI_BIAS;
		1505	if (items > 0)
		1506	{
		1507	if (pri < PRI_MIN) pri = PRI_MIN;
		1508	if (pri > PRI_MAX) pri = PRI_MAX;
		1509	next_pri = pri + PRI_BIAS;
		1510	}
		1511	OUTPUT:
		1512	RETVAL
		1513
		1514	void
		1515	aioreq_nice (int nice = 0)
		1516	CODE:
		1517	nice = next_pri - nice;
		1518	if (nice < PRI_MIN) nice = PRI_MIN;
		1519	if (nice > PRI_MAX) nice = PRI_MAX;
		1520	next_pri = nice + PRI_BIAS;
1160		1521
1161	void	1522	void
1162	flush ()	1523	flush ()
1163	PROTOTYPE:	1524	PROTOTYPE:
1164	CODE:	1525	CODE:
1165	while (nreqs)	1526	while (nreqs)
1166	{	1527	{
1167	poll_wait ();	1528	poll_wait ();
1168	poll_cb ();	1529	poll_cb (0);
1169	}	1530	}
1170		1531
1171	void	1532	void
1172	poll()	1533	poll()
1173	PROTOTYPE:	1534	PROTOTYPE:
1174	CODE:	1535	CODE:
1175	if (nreqs)	1536	if (nreqs)
1176	{	1537	{
1177	poll_wait ();	1538	poll_wait ();
1178	poll_cb ();	1539	poll_cb (0);
1179	}	1540	}
1180		1541
1181	int	1542	int
1182	poll_fileno()	1543	poll_fileno()
1183	PROTOTYPE:	1544	PROTOTYPE:
…		…
1188		1549
1189	int	1550	int
1190	poll_cb(...)	1551	poll_cb(...)
1191	PROTOTYPE:	1552	PROTOTYPE:
1192	CODE:	1553	CODE:
1193	RETVAL = poll_cb ();	1554	RETVAL = poll_cb (0);
		1555	OUTPUT:
		1556	RETVAL
		1557
		1558	int
		1559	poll_some(int max = 0)
		1560	PROTOTYPE: $
		1561	CODE:
		1562	RETVAL = poll_cb (max);
1194	OUTPUT:	1563	OUTPUT:
1195	RETVAL	1564	RETVAL
1196		1565
1197	void	1566	void
1198	poll_wait()	1567	poll_wait()
…		…
1207	CODE:	1576	CODE:
1208	RETVAL = nreqs;	1577	RETVAL = nreqs;
1209	OUTPUT:	1578	OUTPUT:
1210	RETVAL	1579	RETVAL
1211		1580
1212	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1581	int
1213		1582	nready()
1214	void
1215	cancel (aio_req_ornot req)
1216	PROTOTYPE:	1583	PROTOTYPE:
1217	CODE:	1584	CODE:
		1585	RETVAL = get_nready ();
		1586	OUTPUT:
		1587	RETVAL
		1588
		1589	int
		1590	npending()
		1591	PROTOTYPE:
		1592	CODE:
		1593	RETVAL = get_npending ();
		1594	OUTPUT:
		1595	RETVAL
		1596
		1597	PROTOTYPES: DISABLE
		1598
		1599	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1600
		1601	void
		1602	cancel (aio_req_ornot req)
		1603	CODE:
1218	req_cancel (req);	1604	req_cancel (req);
1219		1605
		1606	void
		1607	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1608	CODE:
		1609	SvREFCNT_dec (req->callback);
		1610	req->callback = newSVsv (callback);
		1611
1220	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1612	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1221		1613
1222	void	1614	void
1223	add (aio_req grp, ...)	1615	add (aio_req grp, ...)
1224	PROTOTYPE: $;@
1225	PPCODE:	1616	PPCODE:
1226	{	1617	{
1227	int i;	1618	int i;
		1619	aio_req req;
		1620
		1621	if (grp->fd == 2)
		1622	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1228		1623
1229	for (i = 1; i < items; ++i )	1624	for (i = 1; i < items; ++i )
1230	{	1625	{
1231	if (GIMME_V != G_VOID)	1626	if (GIMME_V != G_VOID)
1232	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1627	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1233		1628
1234	aio_req req = SvAIO_REQ (ST (i));	1629	req = SvAIO_REQ (ST (i));
1235	printf ("req = %p\n", req);//D
1236		1630
1237	if (req)	1631	if (req)
1238	{	1632	{
1239	req->grp_prev = grp;	1633	++grp->length;
1240	req->grp_next = grp->grp_next;
1241	grp->grp_next->grp_prev = req;
1242	grp->grp_next = req;
1243
1244	req->grp = grp;	1634	req->grp = grp;
		1635
		1636	req->grp_prev = 0;
		1637	req->grp_next = grp->grp_first;
		1638
		1639	if (grp->grp_first)
		1640	grp->grp_first->grp_prev = req;
		1641
		1642	grp->grp_first = req;
1245	}	1643	}
1246	}	1644	}
1247	}	1645	}
1248		1646
		1647	void
		1648	cancel_subs (aio_req_ornot req)
		1649	CODE:
		1650	req_cancel_subs (req);
		1651
		1652	void
		1653	result (aio_req grp, ...)
		1654	CODE:
		1655	{
		1656	int i;
		1657	AV *av;
		1658
		1659	grp->errorno = errno;
		1660
		1661	av = newAV ();
		1662
		1663	for (i = 1; i < items; ++i )
		1664	av_push (av, newSVsv (ST (i)));
		1665
		1666	SvREFCNT_dec (grp->data);
		1667	grp->data = (SV *)av;
		1668	}
		1669
		1670	void
		1671	errno (aio_req grp, int errorno = errno)
		1672	CODE:
		1673	grp->errorno = errorno;
		1674
		1675	void
		1676	limit (aio_req grp, int limit)
		1677	CODE:
		1678	grp->fd2 = limit;
		1679	aio_grp_feed (grp);
		1680
		1681	void
		1682	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1683	CODE:
		1684	{
		1685	SvREFCNT_dec (grp->fh2);
		1686	grp->fh2 = newSVsv (callback);
		1687
		1688	if (grp->fd2 <= 0)
		1689	grp->fd2 = 2;
		1690
		1691	aio_grp_feed (grp);
		1692	}
		1693

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