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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.45 by root, Sun Oct 22 00:19:05 2006 UTC vs.
Revision 1.81 by root, Fri Oct 27 20:10:06 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	typedef aio_cb *aio_group;
94		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
95	static int started, wanted;	149	static unsigned int started, wanted;
96	static volatile int nreqs;	150
97	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;
98	static int respipe [2];	202	static int respipe [2];
99		203
100	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
101	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
102	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
103		207
104	static volatile aio_req reqs, reqe; /* queue start, queue end */	208	#if WORDREAD_UNSAFE
105	static volatile aio_req ress, rese; /* queue start, queue end */
106		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);
107	static void req_free (aio_req req);	295	static void req_free (aio_req req);
		296	static void req_cancel (aio_req req);
108		297
109	/* must be called at most once */	298	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	299	static SV *req_sv (aio_req req, const char *klass)
111	{	300	{
		301	if (!req->self)
		302	{
112	req->self = (SV *)newHV ();	303	req->self = (SV *)newHV ();
113	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	304	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		305	}
114		306
115	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)));
116	}	308	}
117		309
118	static aio_req SvAIO_REQ (SV *sv)	310	static aio_req SvAIO_REQ (SV *sv)
119	{	311	{
		312	MAGIC *mg;
		313
120	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	314	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
121	croak ("object of class " AIO_REQ_KLASS " expected");	315	croak ("object of class " AIO_REQ_KLASS " expected");
122		316
123	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	317	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
124		318
125	return mg ? (aio_req)mg->mg_ptr : 0;	319	return mg ? (aio_req)mg->mg_ptr : 0;
126	}	320	}
127		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	req_send (req);
		616
		617	LOCK (wrklock);
		618	--started;
		619	UNLOCK (wrklock);
		620	}
		621
		622	static void min_parallel (int nthreads)
		623	{
		624	if (wanted < nthreads)
		625	wanted = nthreads;
		626	}
		627
		628	static void max_parallel (int nthreads)
		629	{
		630	if (wanted > nthreads)
		631	wanted = nthreads;
		632
		633	while (started > wanted)
		634	end_thread ();
		635	}
		636
128	static void poll_wait ()	637	static void poll_wait ()
129	{	638	{
130	if (nreqs && !ress)
131	{
132	fd_set rfd;	639	fd_set rfd;
		640
		641	while (nreqs)
		642	{
		643	int size;
		644	if (WORDREAD_UNSAFE) LOCK (reslock);
		645	size = res_queue.size;
		646	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		647
		648	if (size)
		649	return;
		650
		651	maybe_start_thread ();
		652
133	FD_ZERO(&rfd);	653	FD_ZERO(&rfd);
134	FD_SET(respipe [0], &rfd);	654	FD_SET(respipe [0], &rfd);
135		655
136	select (respipe [0] + 1, &rfd, 0, 0, 0);	656	select (respipe [0] + 1, &rfd, 0, 0, 0);
137	}	657	}
138	}	658	}
139		659
140	static void req_invoke (aio_req req)
141	{
142	dSP;
143	int errorno = errno;
144
145	if (req->cancelled || !SvOK (req->callback))
146	return;
147
148	errno = req->errorno;
149
150	ENTER;
151	PUSHMARK (SP);
152
153	switch (req->type)
154	{
155	case REQ_READDIR:
156	{
157	SV *rv = &PL_sv_undef;
158
159	if (req->result >= 0)
160	{
161	char *buf = req->data2ptr;
162	AV *av = newAV ();
163
164	while (req->result)
165	{
166	SV *sv = newSVpv (buf, 0);
167
168	av_push (av, sv);
169	buf += SvCUR (sv) + 1;
170	req->result--;
171	}
172
173	rv = sv_2mortal (newRV_noinc ((SV *)av));
174	}
175
176	XPUSHs (rv);
177	}
178	break;
179
180	case REQ_OPEN:
181	{
182	/* convert fd to fh */
183	SV *fh;
184
185	XPUSHs (sv_2mortal (newSViv (req->result)));
186	PUTBACK;
187	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
188	SPAGAIN;
189
190	fh = SvREFCNT_inc (POPs);
191
192	PUSHMARK (SP);
193	XPUSHs (sv_2mortal (fh));
194	}
195	break;
196
197	case REQ_SLEEP:
198	case REQ_GROUP:
199	break;
200
201	default:
202	XPUSHs (sv_2mortal (newSViv (req->result)));
203	break;
204	}
205
206
207	PUTBACK;
208	call_sv (req->callback, G_VOID | G_EVAL);
209	SPAGAIN;
210
211	if (SvTRUE (ERRSV))
212	{
213	req_free (req);
214	croak (0);
215	}
216
217	LEAVE;
218
219	errno = errorno;
220	}
221
222	static void req_free (aio_req req)
223	{
224	if (req->grp)
225	{
226	aio_req grp = req->grp;
227
228	/* unlink request */
229	req->grp_next->grp_prev = req->grp_prev;
230	req->grp_prev->grp_next = req->grp_next;
231
232	if (grp->grp_next == grp)
233	{
234	req_invoke (grp);
235	req_free (grp);
236	}
237	}
238
239	if (req->self)
240	{
241	sv_unmagic (req->self, PERL_MAGIC_ext);
242	SvREFCNT_dec (req->self);
243	}
244
245	if (req->data)
246	SvREFCNT_dec (req->data);
247
248	if (req->fh)
249	SvREFCNT_dec (req->fh);
250
251	if (req->fh2)
252	SvREFCNT_dec (req->fh2);
253
254	if (req->statdata)
255	Safefree (req->statdata);
256
257	if (req->callback)
258	SvREFCNT_dec (req->callback);
259
260	if (req->type == REQ_READDIR && req->result >= 0)
261	free (req->data2ptr);
262
263	Safefree (req);
264	}
265
266	static void req_cancel (aio_req req)
267	{
268	req->cancelled = 1;
269
270	if (req->type == REQ_GROUP)
271	{
272	aio_req sub;
273
274	for (sub = req->grp_next; sub != req; sub = sub->grp_next)
275	req_cancel (sub);
276	}
277	}
278
279	static int poll_cb ()	660	static int poll_cb (int max)
280	{	661	{
281	dSP;	662	dSP;
282	int count = 0;	663	int count = 0;
283	int do_croak = 0;	664	int do_croak = 0;
284	aio_req req;	665	aio_req req;
285		666
286	for (;;)	667	for (;;)
287	{	668	{
288	pthread_mutex_lock (&reslock);	669	while (max <= 0 || count < max)
289	req = ress;
290
291	if (req)
292	{	670	{
293	ress = req->next;	671	maybe_start_thread ();
294		672
		673	LOCK (reslock);
		674	req = reqq_shift (&res_queue);
		675
295	if (!ress)	676	if (req)
296	{	677	{
		678	--npending;
		679
		680	if (!res_queue.size)
		681	{
297	/* read any signals sent by the worker threads */	682	/* read any signals sent by the worker threads */
298	char buf [32];	683	char buf [32];
299	while (read (respipe [0], buf, 32) == 32)	684	while (read (respipe [0], buf, 32) == 32)
		685	;
300	;	686	}
301
302	rese = 0;
303	}	687	}
		688
		689	UNLOCK (reslock);
		690
		691	if (!req)
		692	break;
		693
		694	--nreqs;
		695
		696	if (req->type == REQ_GROUP && req->length)
		697	{
		698	req->fd = 1; /* mark request as delayed */
		699	continue;
		700	}
		701	else
		702	{
		703	if (req->type == REQ_READ)
		704	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		705
		706	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		707	SvREADONLY_off (req->data);
		708
		709	if (req->statdata)
		710	{
		711	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		712	PL_laststatval = req->result;
		713	PL_statcache = *(req->statdata);
		714	}
		715
		716	req_invoke (req);
		717
		718	count++;
		719	}
		720
		721	req_free (req);
304	}	722	}
305		723
306	pthread_mutex_unlock (&reslock);	724	if (nreqs <= max_outstanding)
307
308	if (!req)
309	break;	725	break;
310		726
311	nreqs--;	727	poll_wait ();
312		728
313	if (req->type == REQ_QUIT)	729	max = 0;
314	started--;
315	else if (req->type == REQ_GROUP && req->grp_next != req)
316	continue;
317	else
318	{
319	if (req->type == REQ_READ)
320	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
321
322	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
323	SvREADONLY_off (req->data);
324
325	if (req->statdata)
326	{
327	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
328	PL_laststatval = req->result;
329	PL_statcache = *(req->statdata);
330	}
331
332	req_invoke (req);
333
334	count++;
335	}
336
337	req_free (req);
338	}	730	}
339		731
340	return count;	732	return count;
341	}
342
343	static void *aio_proc(void *arg);
344
345	static void start_thread (void)
346	{
347	sigset_t fullsigset, oldsigset;
348	pthread_t tid;
349	pthread_attr_t attr;
350
351	pthread_attr_init (&attr);
352	pthread_attr_setstacksize (&attr, STACKSIZE);
353	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
354
355	sigfillset (&fullsigset);
356	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
357
358	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
359	started++;
360
361	sigprocmask (SIG_SETMASK, &oldsigset, 0);
362	}
363
364	static void req_send (aio_req req)
365	{
366	while (started < wanted && nreqs >= started)
367	start_thread ();
368
369	nreqs++;
370
371	pthread_mutex_lock (&reqlock);
372
373	req->next = 0;
374
375	if (reqe)
376	{
377	reqe->next = req;
378	reqe = req;
379	}
380	else
381	reqe = reqs = req;
382
383	pthread_cond_signal (&reqwait);
384	pthread_mutex_unlock (&reqlock);
385
386	if (nreqs > max_outstanding)
387	for (;;)
388	{
389	poll_cb ();
390
391	if (nreqs <= max_outstanding)
392	break;
393
394	poll_wait ();
395	}
396	}
397
398	static void end_thread (void)
399	{
400	aio_req req;
401	Newz (0, req, 1, aio_cb);
402	req->type = REQ_QUIT;
403
404	req_send (req);
405	}
406
407	static void min_parallel (int nthreads)
408	{
409	if (wanted < nthreads)
410	wanted = nthreads;
411	}
412
413	static void max_parallel (int nthreads)
414	{
415	int cur = started;
416
417	if (wanted > nthreads)
418	wanted = nthreads;
419
420	while (cur > wanted)
421	{
422	end_thread ();
423	cur--;
424	}
425
426	while (started > wanted)
427	{
428	poll_wait ();
429	poll_cb ();
430	}
431	}	733	}
432		734
433	static void create_pipe ()	735	static void create_pipe ()
434	{	736	{
435	if (pipe (respipe))	737	if (pipe (respipe))
…		…
459	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	761	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
460	{	762	{
461	ssize_t res;	763	ssize_t res;
462	off_t ooffset;	764	off_t ooffset;
463		765
464	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
465	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
466	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
467	res = read (fd, buf, count);	769	res = read (fd, buf, count);
468	lseek (fd, ooffset, SEEK_SET);	770	lseek (fd, ooffset, SEEK_SET);
469	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
470		772
471	return res;	773	return res;
472	}	774	}
473		775
474	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	776	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
475	{	777	{
476	ssize_t res;	778	ssize_t res;
477	off_t ooffset;	779	off_t ooffset;
478		780
479	pthread_mutex_lock (&preadwritelock);	781	LOCK (preadwritelock);
480	ooffset = lseek (fd, 0, SEEK_CUR);	782	ooffset = lseek (fd, 0, SEEK_CUR);
481	lseek (fd, offset, SEEK_SET);	783	lseek (fd, offset, SEEK_SET);
482	res = write (fd, buf, count);	784	res = write (fd, buf, count);
483	lseek (fd, offset, SEEK_SET);	785	lseek (fd, offset, SEEK_SET);
484	pthread_mutex_unlock (&preadwritelock);	786	UNLOCK (preadwritelock);
485		787
486	return res;	788	return res;
487	}	789	}
488	#endif	790	#endif
489		791
490	#if !HAVE_FDATASYNC	792	#if !HAVE_FDATASYNC
491	# define fdatasync fsync	793	# define fdatasync fsync
492	#endif	794	#endif
493		795
494	#if !HAVE_READAHEAD	796	#if !HAVE_READAHEAD
495	# define readahead aio_readahead	797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
496		798
497	static ssize_t readahead (int fd, off_t offset, size_t count)	799	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
498	{	800	{
499	char readahead_buf[4096];	801	dBUF;
500		802
501	while (count > 0)	803	while (count > 0)
502	{	804	{
503	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
504		806
505	pread (fd, readahead_buf, len, offset);	807	pread (fd, aio_buf, len, offset);
506	offset += len;	808	offset += len;
507	count -= len;	809	count -= len;
508	}	810	}
509		811
510	errno = 0;	812	errno = 0;
511	}	813	}
		814
512	#endif	815	#endif
513		816
514	#if !HAVE_READDIR_R	817	#if !HAVE_READDIR_R
515	# define readdir_r aio_readdir_r	818	# define readdir_r aio_readdir_r
516		819
…		…
519	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	822	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
520	{	823	{
521	struct dirent *e;	824	struct dirent *e;
522	int errorno;	825	int errorno;
523		826
524	pthread_mutex_lock (&readdirlock);	827	LOCK (readdirlock);
525		828
526	e = readdir (dirp);	829	e = readdir (dirp);
527	errorno = errno;	830	errorno = errno;
528		831
529	if (e)	832	if (e)
…		…
532	strcpy (ent->d_name, e->d_name);	835	strcpy (ent->d_name, e->d_name);
533	}	836	}
534	else	837	else
535	*res = 0;	838	*res = 0;
536		839
537	pthread_mutex_unlock (&readdirlock);	840	UNLOCK (readdirlock);
538		841
539	errno = errorno;	842	errno = errorno;
540	return e ? 0 : -1;	843	return e ? 0 : -1;
541	}	844	}
542	#endif	845	#endif
543		846
544	/* sendfile always needs emulation */	847	/* sendfile always needs emulation */
545	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	848	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
546	{	849	{
547	ssize_t res;	850	ssize_t res;
548		851
549	if (!count)	852	if (!count)
550	return 0;	853	return 0;
…		…
561	{	864	{
562	off_t sbytes;	865	off_t sbytes;
563	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
564		867
565	if (res < 0 && sbytes)	868	if (res < 0 && sbytes)
566	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
567	res = sbytes;	870	res = sbytes;
568	}	871	}
569		872
570	# elif __hpux	873	# elif __hpux
571	res = sendfile (ofd, ifd, offset, count, 0, 0);	874	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
599	#endif	902	#endif
600	)	903	)
601	)	904	)
602	{	905	{
603	/* emulate sendfile. this is a major pain in the ass */	906	/* emulate sendfile. this is a major pain in the ass */
604	char buf[4096];	907	dBUF;
		908
605	res = 0;	909	res = 0;
606		910
607	while (count)	911	while (count)
608	{	912	{
609	ssize_t cnt;	913	ssize_t cnt;
610		914
611	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
612		916
613	if (cnt <= 0)	917	if (cnt <= 0)
614	{	918	{
615	if (cnt && !res) res = -1;	919	if (cnt && !res) res = -1;
616	break;	920	break;
617	}	921	}
618		922
619	cnt = write (ofd, buf, cnt);	923	cnt = write (ofd, aio_buf, cnt);
620		924
621	if (cnt <= 0)	925	if (cnt <= 0)
622	{	926	{
623	if (cnt && !res) res = -1;	927	if (cnt && !res) res = -1;
624	break;	928	break;
…		…
632		936
633	return res;	937	return res;
634	}	938	}
635		939
636	/* read a full directory */	940	/* read a full directory */
637	static int scandir_ (const char *path, void **namesp)	941	static void scandir_ (aio_req req, worker *self)
638	{	942	{
639	DIR *dirp = opendir (path);	943	DIR *dirp;
640	union	944	union
641	{	945	{
642	struct dirent d;	946	struct dirent d;
643	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	947	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
644	} u;	948	} *u;
645	struct dirent *entp;	949	struct dirent *entp;
646	char *name, *names;	950	char *name, *names;
647	int memlen = 4096;	951	int memlen = 4096;
648	int memofs = 0;	952	int memofs = 0;
649	int res = 0;	953	int res = 0;
650	int errorno;	954	int errorno;
651		955
652	if (!dirp)	956	LOCK (wrklock);
653	return -1;	957	self->dirp = dirp = opendir (req->dataptr);
654		958	self->dbuf = u = malloc (sizeof (*u));
655	names = malloc (memlen);	959	req->data2ptr = names = malloc (memlen);
		960	UNLOCK (wrklock);
		961
		962	if (dirp && u && names)
		963	for (;;)
		964	{
		965	errno = 0;
		966	readdir_r (dirp, &u->d, &entp);
		967
		968	if (!entp)
		969	break;
		970
		971	name = entp->d_name;
		972
		973	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		974	{
		975	int len = strlen (name) + 1;
		976
		977	res++;
		978
		979	while (memofs + len > memlen)
		980	{
		981	memlen *= 2;
		982	LOCK (wrklock);
		983	req->data2ptr = names = realloc (names, memlen);
		984	UNLOCK (wrklock);
		985
		986	if (!names)
		987	break;
		988	}
		989
		990	memcpy (names + memofs, name, len);
		991	memofs += len;
		992	}
		993	}
		994
		995	if (errno)
		996	res = -1;
		997
		998	req->result = res;
		999	}
		1000
		1001	/*****************************************************************************/
		1002
		1003	static void *aio_proc (void *thr_arg)
		1004	{
		1005	aio_req req;
		1006	worker *self = (worker *)thr_arg;
656		1007
657	for (;;)	1008	for (;;)
658	{	1009	{
659	errno = 0, readdir_r (dirp, &u.d, &entp);	1010	LOCK (reqlock);
660
661	if (!entp)
662	break;
663
664	name = entp->d_name;
665
666	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
667	{
668	int len = strlen (name) + 1;
669
670	res++;
671
672	while (memofs + len > memlen)
673	{
674	memlen *= 2;
675	names = realloc (names, memlen);
676	if (!names)
677	break;
678	}
679
680	memcpy (names + memofs, name, len);
681	memofs += len;
682	}
683	}
684
685	errorno = errno;
686	closedir (dirp);
687
688	if (errorno)
689	{
690	free (names);
691	errno = errorno;
692	res = -1;
693	}
694
695	*namesp = (void *)names;
696	return res;
697	}
698
699	/*****************************************************************************/
700
701	static void *aio_proc (void *thr_arg)
702	{
703	aio_req req;
704	int type;
705
706	do
707	{
708	pthread_mutex_lock (&reqlock);
709		1011
710	for (;;)	1012	for (;;)
711	{	1013	{
712	req = reqs;	1014	self->req = req = reqq_shift (&req_queue);
713
714	if (reqs)
715	{
716	reqs = reqs->next;
717	if (!reqs) reqe = 0;
718	}
719		1015
720	if (req)	1016	if (req)
721	break;	1017	break;
722		1018
723	pthread_cond_wait (&reqwait, &reqlock);	1019	pthread_cond_wait (&reqwait, &reqlock);
724	}	1020	}
725		1021
726	pthread_mutex_unlock (&reqlock);	1022	--nready;
		1023
		1024	UNLOCK (reqlock);
727		1025
728	errno = 0; /* strictly unnecessary */	1026	errno = 0; /* strictly unnecessary */
729		1027
730	if (!req->cancelled)	1028	if (!(req->flags & FLAG_CANCELLED))
731	switch (req->type)	1029	switch (req->type)
732	{	1030	{
733	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1031	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
734	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1032	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
735		1033
736	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1034	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
737	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1035	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
738		1036
739	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
740	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
741	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
742		1040
…		…
745	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1043	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
746	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1044	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
747	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1045	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
748	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1046	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
749	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1047	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1048	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
750		1049
751	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1050	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
752	case REQ_FSYNC: req->result = fsync (req->fd); break;	1051	case REQ_FSYNC: req->result = fsync (req->fd); break;
753	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1052	case REQ_READDIR: scandir_ (req, self); break;
754		1053
755	case REQ_SLEEP:	1054	case REQ_BUSY:
756	{	1055	{
757	struct timeval tv;	1056	struct timeval tv;
758		1057
759	tv.tv_sec = req->fd;	1058	tv.tv_sec = req->fd;
760	tv.tv_usec = req->fd2;	1059	tv.tv_usec = req->fd2;
761		1060
762	req->result = select (0, 0, 0, 0, &tv);	1061	req->result = select (0, 0, 0, 0, &tv);
763	}	1062	}
764		1063
		1064	case REQ_GROUP:
		1065	case REQ_NOP:
		1066	break;
		1067
765	case REQ_QUIT:	1068	case REQ_QUIT:
		1069	LOCK (wrklock);
		1070	worker_free (self);
		1071	--started;
		1072	UNLOCK (wrklock);
766	break;	1073	return 0;
767		1074
768	default:	1075	default:
769	req->result = ENOSYS;	1076	req->result = ENOSYS;
770	break;	1077	break;
771	}	1078	}
772		1079
773	req->errorno = errno;	1080	req->errorno = errno;
774		1081
775	pthread_mutex_lock (&reslock);	1082	LOCK (reslock);
776		1083
777	req->next = 0;	1084	++npending;
778		1085
779	if (rese)	1086	if (!reqq_push (&res_queue, req))
780	{
781	rese->next = req;
782	rese = req;
783	}
784	else
785	{
786	rese = ress = req;
787
788	/* write a dummy byte to the pipe so fh becomes ready */	1087	/* write a dummy byte to the pipe so fh becomes ready */
789	write (respipe [1], &respipe, 1);	1088	write (respipe [1], &respipe, 1);
790	}
791		1089
792	pthread_mutex_unlock (&reslock);	1090	self->req = 0;
793	}	1091	worker_clear (self);
794	while (type != REQ_QUIT);
795		1092
796	return 0;	1093	UNLOCK (reslock);
		1094	}
797	}	1095	}
798		1096
799	/*****************************************************************************/	1097	/*****************************************************************************/
800		1098
801	static void atfork_prepare (void)	1099	static void atfork_prepare (void)
802	{	1100	{
803	pthread_mutex_lock (&reqlock);	1101	LOCK (wrklock);
804	pthread_mutex_lock (&reslock);	1102	LOCK (reqlock);
		1103	LOCK (reslock);
805	#if !HAVE_PREADWRITE	1104	#if !HAVE_PREADWRITE
806	pthread_mutex_lock (&preadwritelock);	1105	LOCK (preadwritelock);
807	#endif	1106	#endif
808	#if !HAVE_READDIR_R	1107	#if !HAVE_READDIR_R
809	pthread_mutex_lock (&readdirlock);	1108	LOCK (readdirlock);
810	#endif	1109	#endif
811	}	1110	}
812		1111
813	static void atfork_parent (void)	1112	static void atfork_parent (void)
814	{	1113	{
815	#if !HAVE_READDIR_R	1114	#if !HAVE_READDIR_R
816	pthread_mutex_unlock (&readdirlock);	1115	UNLOCK (readdirlock);
817	#endif	1116	#endif
818	#if !HAVE_PREADWRITE	1117	#if !HAVE_PREADWRITE
819	pthread_mutex_unlock (&preadwritelock);	1118	UNLOCK (preadwritelock);
820	#endif	1119	#endif
821	pthread_mutex_unlock (&reslock);	1120	UNLOCK (reslock);
822	pthread_mutex_unlock (&reqlock);	1121	UNLOCK (reqlock);
		1122	UNLOCK (wrklock);
823	}	1123	}
824		1124
825	static void atfork_child (void)	1125	static void atfork_child (void)
826	{	1126	{
827	aio_req prv;	1127	aio_req prv;
828		1128
		1129	while (prv = reqq_shift (&req_queue))
		1130	req_free (prv);
		1131
		1132	while (prv = reqq_shift (&res_queue))
		1133	req_free (prv);
		1134
		1135	while (wrk_first.next != &wrk_first)
		1136	{
		1137	worker *wrk = wrk_first.next;
		1138
		1139	if (wrk->req)
		1140	req_free (wrk->req);
		1141
		1142	worker_clear (wrk);
		1143	worker_free (wrk);
		1144	}
		1145
829	started = 0;	1146	started = 0;
830		1147	nreqs = 0;
831	while (reqs)
832	{
833	prv = reqs;
834	reqs = prv->next;
835	req_free (prv);
836	}
837
838	reqs = reqe = 0;
839
840	while (ress)
841	{
842	prv = ress;
843	ress = prv->next;
844	req_free (prv);
845	}
846
847	ress = rese = 0;
848		1148
849	close (respipe [0]);	1149	close (respipe [0]);
850	close (respipe [1]);	1150	close (respipe [1]);
851	create_pipe ();	1151	create_pipe ();
852		1152
853	atfork_parent ();	1153	atfork_parent ();
854	}	1154	}
855		1155
856	#define dREQ \	1156	#define dREQ \
857	aio_req req; \	1157	aio_req req; \
		1158	int req_pri = next_pri; \
		1159	next_pri = DEFAULT_PRI + PRI_BIAS; \
858	\	1160	\
859	if (SvOK (callback) && !SvROK (callback)) \	1161	if (SvOK (callback) && !SvROK (callback)) \
860	croak ("callback must be undef or of reference type"); \	1162	croak ("callback must be undef or of reference type"); \
861	\	1163	\
862	Newz (0, req, 1, aio_cb); \	1164	Newz (0, req, 1, aio_cb); \
863	if (!req) \	1165	if (!req) \
864	croak ("out of memory during aio_req allocation"); \	1166	croak ("out of memory during aio_req allocation"); \
865	\	1167	\
866	req->callback = newSVsv (callback)	1168	req->callback = newSVsv (callback); \
		1169	req->pri = req_pri
867		1170
868	#define REQ_SEND \	1171	#define REQ_SEND \
869	req_send (req); \	1172	req_send (req); \
870	\	1173	\
871	if (GIMME_V != G_VOID) \	1174	if (GIMME_V != G_VOID) \
…		…
879	{	1182	{
880	HV *stash = gv_stashpv ("IO::AIO", 1);	1183	HV *stash = gv_stashpv ("IO::AIO", 1);
881	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1184	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
882	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1185	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
883	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1186	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1187	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1188	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
884		1189
885	create_pipe ();	1190	create_pipe ();
886	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1191	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
887	}
888		1192
		1193	start_thread ();
		1194	}
		1195
889	void	1196	void
890	min_parallel (nthreads)	1197	min_parallel (int nthreads)
891	int nthreads
892	PROTOTYPE: $	1198	PROTOTYPE: $
893		1199
894	void	1200	void
895	max_parallel (nthreads)	1201	max_parallel (int nthreads)
896	int nthreads
897	PROTOTYPE: $	1202	PROTOTYPE: $
898		1203
899	int	1204	int
900	max_outstanding (nreqs)	1205	max_outstanding (int maxreqs)
901	int nreqs	1206	PROTOTYPE: $
902	PROTOTYPE: $
903	CODE:	1207	CODE:
904	RETVAL = max_outstanding;	1208	RETVAL = max_outstanding;
905	max_outstanding = nreqs;	1209	max_outstanding = maxreqs;
		1210	OUTPUT:
		1211	RETVAL
906		1212
907	void	1213	void
908	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1214	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
909	SV * pathname	1215	SV * pathname
910	int flags	1216	int flags
…		…
1125		1431
1126	REQ_SEND;	1432	REQ_SEND;
1127	}	1433	}
1128		1434
1129	void	1435	void
		1436	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1437	SV * pathname
		1438	SV * callback
		1439	UV mode
		1440	UV dev
		1441	PPCODE:
		1442	{
		1443	dREQ;
		1444
		1445	req->type = REQ_MKNOD;
		1446	req->data = newSVsv (pathname);
		1447	req->dataptr = SvPVbyte_nolen (req->data);
		1448	req->mode = (mode_t)mode;
		1449	req->offset = dev;
		1450
		1451	REQ_SEND;
		1452	}
		1453
		1454	void
1130	aio_sleep (delay,callback=&PL_sv_undef)	1455	aio_busy (delay,callback=&PL_sv_undef)
1131	double delay	1456	double delay
1132	SV * callback	1457	SV * callback
1133	PPCODE:	1458	PPCODE:
1134	{	1459	{
1135	dREQ;	1460	dREQ;
1136		1461
1137	req->type = REQ_SLEEP;	1462	req->type = REQ_BUSY;
1138	req->fd = delay < 0. ? 0 : delay;	1463	req->fd = delay < 0. ? 0 : delay;
1139	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1464	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1140		1465
1141	REQ_SEND;	1466	REQ_SEND;
1142	}	1467	}
1143		1468
1144	void	1469	void
1145	aio_group (callback=&PL_sv_undef)	1470	aio_group (callback=&PL_sv_undef)
1146	SV * callback	1471	SV * callback
1147	PROTOTYPE: ;&	1472	PROTOTYPE: ;$
1148	PPCODE:	1473	PPCODE:
1149	{	1474	{
1150	dREQ;	1475	dREQ;
		1476
1151	req->type = REQ_GROUP;	1477	req->type = REQ_GROUP;
1152	req->grp_next = req;
1153	req->grp_prev = req;
1154
1155	req_send (req);	1478	req_send (req);
		1479
1156	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1480	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1157	}	1481	}
		1482
		1483	void
		1484	aio_nop (callback=&PL_sv_undef)
		1485	SV * callback
		1486	PPCODE:
		1487	{
		1488	dREQ;
		1489
		1490	req->type = REQ_NOP;
		1491
		1492	REQ_SEND;
		1493	}
		1494
		1495	int
		1496	aioreq_pri (int pri = 0)
		1497	PROTOTYPE: ;$
		1498	CODE:
		1499	RETVAL = next_pri - PRI_BIAS;
		1500	if (items > 0)
		1501	{
		1502	if (pri < PRI_MIN) pri = PRI_MIN;
		1503	if (pri > PRI_MAX) pri = PRI_MAX;
		1504	next_pri = pri + PRI_BIAS;
		1505	}
		1506	OUTPUT:
		1507	RETVAL
		1508
		1509	void
		1510	aioreq_nice (int nice = 0)
		1511	CODE:
		1512	nice = next_pri - nice;
		1513	if (nice < PRI_MIN) nice = PRI_MIN;
		1514	if (nice > PRI_MAX) nice = PRI_MAX;
		1515	next_pri = nice + PRI_BIAS;
1158		1516
1159	void	1517	void
1160	flush ()	1518	flush ()
1161	PROTOTYPE:	1519	PROTOTYPE:
1162	CODE:	1520	CODE:
1163	while (nreqs)	1521	while (nreqs)
1164	{	1522	{
1165	poll_wait ();	1523	poll_wait ();
1166	poll_cb ();	1524	poll_cb (0);
1167	}	1525	}
1168		1526
1169	void	1527	void
1170	poll()	1528	poll()
1171	PROTOTYPE:	1529	PROTOTYPE:
1172	CODE:	1530	CODE:
1173	if (nreqs)	1531	if (nreqs)
1174	{	1532	{
1175	poll_wait ();	1533	poll_wait ();
1176	poll_cb ();	1534	poll_cb (0);
1177	}	1535	}
1178		1536
1179	int	1537	int
1180	poll_fileno()	1538	poll_fileno()
1181	PROTOTYPE:	1539	PROTOTYPE:
…		…
1186		1544
1187	int	1545	int
1188	poll_cb(...)	1546	poll_cb(...)
1189	PROTOTYPE:	1547	PROTOTYPE:
1190	CODE:	1548	CODE:
1191	RETVAL = poll_cb ();	1549	RETVAL = poll_cb (0);
		1550	OUTPUT:
		1551	RETVAL
		1552
		1553	int
		1554	poll_some(int max = 0)
		1555	PROTOTYPE: $
		1556	CODE:
		1557	RETVAL = poll_cb (max);
1192	OUTPUT:	1558	OUTPUT:
1193	RETVAL	1559	RETVAL
1194		1560
1195	void	1561	void
1196	poll_wait()	1562	poll_wait()
…		…
1205	CODE:	1571	CODE:
1206	RETVAL = nreqs;	1572	RETVAL = nreqs;
1207	OUTPUT:	1573	OUTPUT:
1208	RETVAL	1574	RETVAL
1209		1575
1210	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1576	int
1211		1577	nready()
1212	void
1213	cancel (aio_req_ornot req)
1214	PROTOTYPE:	1578	PROTOTYPE:
1215	CODE:	1579	CODE:
		1580	RETVAL = get_nready ();
		1581	OUTPUT:
		1582	RETVAL
		1583
		1584	int
		1585	npending()
		1586	PROTOTYPE:
		1587	CODE:
		1588	RETVAL = get_npending ();
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	PROTOTYPES: DISABLE
		1593
		1594	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1595
		1596	void
		1597	cancel (aio_req_ornot req)
		1598	CODE:
1216	req_cancel (req);	1599	req_cancel (req);
1217		1600
		1601	void
		1602	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1603	CODE:
		1604	SvREFCNT_dec (req->callback);
		1605	req->callback = newSVsv (callback);
		1606
1218	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1607	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1219		1608
1220	void	1609	void
1221	add (aio_req grp, ...)	1610	add (aio_req grp, ...)
1222	PROTOTYPE: $;@
1223	PPCODE:	1611	PPCODE:
1224	{	1612	{
1225	int i;	1613	int i;
		1614	aio_req req;
		1615
		1616	if (grp->fd == 2)
		1617	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1226		1618
1227	for (i = 1; i < items; ++i )	1619	for (i = 1; i < items; ++i )
1228	{	1620	{
1229	aio_req req = SvAIO_REQ (ST (i));
1230
1231	req->grp_prev = grp;
1232	req->grp_next = grp->grp_next;
1233	grp->grp_next->grp_prev = req;
1234	grp->grp_next = req;
1235
1236	req->grp = grp;
1237
1238	if (GIMME_V != G_VOID)	1621	if (GIMME_V != G_VOID)
1239	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1622	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1623
		1624	req = SvAIO_REQ (ST (i));
		1625
		1626	if (req)
		1627	{
		1628	++grp->length;
		1629	req->grp = grp;
		1630
		1631	req->grp_prev = 0;
		1632	req->grp_next = grp->grp_first;
		1633
		1634	if (grp->grp_first)
		1635	grp->grp_first->grp_prev = req;
		1636
		1637	grp->grp_first = req;
		1638	}
1240	}	1639	}
1241	}	1640	}
1242		1641
		1642	void
		1643	cancel_subs (aio_req_ornot req)
		1644	CODE:
		1645	req_cancel_subs (req);
		1646
		1647	void
		1648	result (aio_req grp, ...)
		1649	CODE:
		1650	{
		1651	int i;
		1652	AV *av;
		1653
		1654	grp->errorno = errno;
		1655
		1656	av = newAV ();
		1657
		1658	for (i = 1; i < items; ++i )
		1659	av_push (av, newSVsv (ST (i)));
		1660
		1661	SvREFCNT_dec (grp->data);
		1662	grp->data = (SV *)av;
		1663	}
		1664
		1665	void
		1666	errno (aio_req grp, int errorno = errno)
		1667	CODE:
		1668	grp->errorno = errorno;
		1669
		1670	void
		1671	limit (aio_req grp, int limit)
		1672	CODE:
		1673	grp->fd2 = limit;
		1674	aio_grp_feed (grp);
		1675
		1676	void
		1677	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1678	CODE:
		1679	{
		1680	SvREFCNT_dec (grp->fh2);
		1681	grp->fh2 = newSVsv (callback);
		1682
		1683	if (grp->fd2 <= 0)
		1684	grp->fd2 = 2;
		1685
		1686	aio_grp_feed (grp);
		1687	}
		1688

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