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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.23 by root, Tue Aug 16 23:33:34 2005 UTC vs.
Revision 1.80 by root, Fri Oct 27 19:17:23 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"
7		16
8	#include "autoconf/config.h"	17	#include "autoconf/config.h"
9		18
		19	#include <pthread.h>
		20
		21	#include <stddef.h>
		22	#include <errno.h>
		23	#include <sys/time.h>
		24	#include <sys/select.h>
10	#include <sys/types.h>	25	#include <sys/types.h>
11	#include <sys/stat.h>	26	#include <sys/stat.h>
12		27	#include <limits.h>
13	#include <unistd.h>	28	#include <unistd.h>
14	#include <fcntl.h>	29	#include <fcntl.h>
15	#include <signal.h>	30	#include <signal.h>
16	#include <sched.h>	31	#include <sched.h>
17		32
18	#include <pthread.h>	33	#if HAVE_SENDFILE
		34	# if __linux
		35	# include <sys/sendfile.h>
		36	# elif __freebsd
		37	# include <sys/socket.h>
		38	# include <sys/uio.h>
		39	# elif __hpux
		40	# include <sys/socket.h>
		41	# elif __solaris /* not yet */
		42	# include <sys/sendfile.h>
		43	# else
		44	# error sendfile support requested but not available
		45	# endif
		46	#endif
19		47
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	48	/* used for struct dirent, AIX doesn't provide it */
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	49	#ifndef NAME_MAX
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	50	# define NAME_MAX 4096
		51	#endif
		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
23		57
24	#if __ia64	58	#if __ia64
25	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
26	#else	62	#else
27	# define STACKSIZE 4096	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
28	#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;
29		88
30	enum {	89	enum {
31	REQ_QUIT,	90	REQ_QUIT,
32	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		93	REQ_SENDFILE,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
37	REQ_SYMLINK,	97	REQ_READDIR,
		98	REQ_LINK, REQ_SYMLINK,
		99	REQ_GROUP, REQ_NOP,
		100	REQ_BUSY,
38	};	101	};
39		102
		103	#define AIO_REQ_KLASS "IO::AIO::REQ"
		104	#define AIO_GRP_KLASS "IO::AIO::GRP"
		105
40	typedef struct aio_cb {	106	typedef struct aio_cb
		107	{
41	struct aio_cb *volatile next;	108	struct aio_cb *volatile next;
42		109
43	int type;	110	SV *data, *callback;
44		111	SV *fh, *fh2;
45	int fd;	112	void *dataptr, *data2ptr;
		113	Stat_t *statdata;
46	off_t offset;	114	off_t offset;
47	size_t length;	115	size_t length;
48	ssize_t result;	116	ssize_t result;
		117
		118	STRLEN dataoffset;
		119	int type;
		120	int fd, fd2;
		121	int errorno;
49	mode_t mode; /* open */	122	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr, *data2ptr;
53	STRLEN dataoffset;
54		123
55	Stat_t *statdata;	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;
56	} aio_cb;	129	} aio_cb;
57		130
		131	enum {
		132	FLAG_CANCELLED = 0x01,
		133	};
		134
58	typedef aio_cb *aio_req;	135	typedef aio_cb *aio_req;
		136	typedef aio_cb *aio_req_ornot;
59		137
60	static int started;	138	enum {
61	static volatile int nreqs;	139	PRI_MIN = -4,
62	static int max_outstanding = 1<<30;	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
		149	static unsigned int started, wanted;
		150
		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;
63	static int respipe [2];	202	static int respipe [2];
64		203
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
67	static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69		207
70	static volatile aio_req reqs, reqe; /* queue start, queue end */	208	#if WORDREAD_UNSAFE
71	static volatile aio_req ress, rese; /* queue start, queue end */
72		209
73	static void	210	static unsigned int get_nready ()
74	poll_wait ()
75	{	211	{
76	if (nreqs && !ress)	212	unsigned int retval;
77	{
78	fd_set rfd;
79	FD_ZERO(&rfd);
80	FD_SET(respipe [0], &rfd);
81		213
82	select (respipe [0] + 1, &rfd, 0, 0, 0);	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])
83	}	258	{
84	}	259	q->qe[pri]->next = req;
		260	q->qe[pri] = req;
		261	}
		262	else
		263	q->qe[pri] = q->qs[pri] = req;
85		264
86	static int	265	return q->size++;
87	poll_cb ()	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);
		295	static void req_free (aio_req req);
		296	static void req_cancel (aio_req req);
		297
		298	/* must be called at most once */
		299	static SV *req_sv (aio_req req, const char *klass)
		300	{
		301	if (!req->self)
		302	{
		303	req->self = (SV *)newHV ();
		304	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		305	}
		306
		307	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		308	}
		309
		310	static aio_req SvAIO_REQ (SV *sv)
		311	{
		312	MAGIC *mg;
		313
		314	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		315	croak ("object of class " AIO_REQ_KLASS " expected");
		316
		317	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		318
		319	return mg ? (aio_req)mg->mg_ptr : 0;
		320	}
		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)
88	{	369	{
89	dSP;	370	dSP;
90	int count = 0;
91	aio_req req, prv;
92		371
93	pthread_mutex_lock (&reslock);	372	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
94
95	{	373	{
96	/* read any signals sent by the worker threads */	374	ENTER;
97	char buf [32];	375	SAVETMPS;
98	while (read (respipe [0], buf, 32) == 32)	376	PUSHMARK (SP);
99	;	377	EXTEND (SP, 1);
100	}
101		378
102	req = ress;	379	switch (req->type)
103	ress = rese = 0;
104
105	pthread_mutex_unlock (&reslock);
106
107	while (req)
108	{
109	nreqs--;
110
111	if (req->type == REQ_QUIT)
112	started--;
113	else
114	{	380	{
115	int errorno = errno;	381	case REQ_READDIR:
116	errno = req->errorno;
117
118	if (req->type == REQ_READ)
119	SvCUR_set (req->data, req->dataoffset
120	+ req->result > 0 ? req->result : 0);
121
122	if (req->data)
123	SvREFCNT_dec (req->data);
124
125	if (req->fh)
126	SvREFCNT_dec (req->fh);
127
128	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
129	{	382	{
130	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	383	SV *rv = &PL_sv_undef;
131	PL_laststatval = req->result;
132	PL_statcache = *(req->statdata);
133		384
134	Safefree (req->statdata);	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);
135	}	405	}
		406	break;
136		407
137	ENTER;	408	case REQ_OPEN:
138	PUSHMARK (SP);
139	XPUSHs (sv_2mortal (newSViv (req->result)));
140
141	if (req->type == REQ_OPEN)
142	{	409	{
143	/* convert fd to fh */	410	/* convert fd to fh */
144	SV *fh;	411	SV *fh;
145		412
		413	PUSHs (sv_2mortal (newSViv (req->result)));
146	PUTBACK;	414	PUTBACK;
147	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	415	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
148	SPAGAIN;	416	SPAGAIN;
149		417
150	fh = SvREFCNT_inc (POPs);	418	fh = SvREFCNT_inc (POPs);
151		419
152	PUSHMARK (SP);	420	PUSHMARK (SP);
153	XPUSHs (sv_2mortal (fh));	421	XPUSHs (sv_2mortal (fh));
154	}	422	}
		423	break;
155		424
156	if (SvOK (req->callback))	425	case REQ_GROUP:
		426	req->fd = 2; /* mark group as finished */
		427
		428	if (req->data)
157	{	429	{
158	PUTBACK;	430	int i;
159	call_sv (req->callback, G_VOID | G_EVAL);	431	AV *av = (AV *)req->data;
160	SPAGAIN;	432
		433	EXTEND (SP, AvFILL (av) + 1);
		434	for (i = 0; i <= AvFILL (av); ++i)
		435	PUSHs (*av_fetch (av, i, 0));
161	}	436	}
		437	break;
162		438
163	LEAVE;	439	case REQ_NOP:
164		440	case REQ_BUSY:
165	if (req->callback)	441	break;
166	SvREFCNT_dec (req->callback);
167		442
168	errno = errorno;	443	default:
169	count++;	444	PUSHs (sv_2mortal (newSViv (req->result)));
		445	break;
170	}	446	}
171		447
172	prv = req;	448	errno = req->errorno;
173	req = req->next;
174	Safefree (prv);
175		449
176	/* TODO: croak on errors? */	450	PUTBACK;
		451	call_sv (req->callback, G_VOID | G_EVAL);
		452	SPAGAIN;
		453
		454	FREETMPS;
		455	LEAVE;
		456	}
		457
		458	if (req->grp)
177	}	459	{
		460	aio_req grp = req->grp;
178		461
179	return count;	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);
180	}	518	}
181		519
182	static void *aio_proc(void *arg);	520	static void *aio_proc(void *arg);
183		521
184	static void
185	start_thread (void)	522	static void start_thread (void)
186	{	523	{
187	sigset_t fullsigset, oldsigset;	524	sigset_t fullsigset, oldsigset;
188	pthread_t tid;
189	pthread_attr_t attr;	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");
190		531
191	pthread_attr_init (&attr);	532	pthread_attr_init (&attr);
192	pthread_attr_setstacksize (&attr, STACKSIZE);	533	pthread_attr_setstacksize (&attr, STACKSIZE);
193	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	534	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		535	#ifdef PTHREAD_SCOPE_PROCESS
		536	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		537	#endif
194		538
195	sigfillset (&fullsigset);	539	sigfillset (&fullsigset);
		540
		541	LOCK (wrklock);
196	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	542	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
197		543
198	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	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;
199	started++;	550	++started;
		551	}
		552	else
		553	free (wrk);
200		554
201	sigprocmask (SIG_SETMASK, &oldsigset, 0);	555	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		556	UNLOCK (wrklock);
202	}	557	}
203		558
204	static void	559	static void maybe_start_thread ()
205	send_req (aio_req req)
206	{	560	{
207	nreqs++;	561	#if 0
		562	static struct timeval last;
		563	struct timeval diff, now;
		564	#endif
208		565
209	pthread_mutex_lock (&reqlock);	566	if (started >= wanted)
		567	return;
		568
		569	if (nready <= nreqs - get_nready () - get_npending ())
		570	return;
210		571
211	req->next = 0;	572	#if 0
		573	gettimeofday (&now, 0);
212		574
213	if (reqe)	575	diff.tv_sec = now.tv_sec - last.tv_sec;
214	{	576	diff.tv_usec = now.tv_usec - last.tv_usec;
215	reqe->next = req;	577
216	reqe = req;	578	if (diff.tv_usec < 0)
217	}	579	{
218	else	580	--diff.tv_sec;
219	reqe = reqs = req;	581	diff.tv_usec += 1000000;
		582	}
220		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);
221	pthread_cond_signal (&reqwait);	600	pthread_cond_signal (&reqwait);
222	pthread_mutex_unlock (&reqlock);	601	UNLOCK (reqlock);
223		602
		603	maybe_start_thread ();
		604	}
		605
		606	static void end_thread (void)
		607	{
		608	aio_req req;
		609
		610	Newz (0, req, 1, aio_cb);
		611
		612	req->type = REQ_QUIT;
		613	req->pri = PRI_MAX + PRI_BIAS;
		614
		615	req_send (req);
		616
		617	LOCK (wrklock);
		618	--started;
		619	UNLOCK (wrklock);
		620	}
		621
		622	static void min_parallel (int nthreads)
		623	{
		624	if (wanted < nthreads)
		625	wanted = nthreads;
		626	}
		627
		628	static void max_parallel (int nthreads)
		629	{
		630	if (wanted > nthreads)
		631	wanted = nthreads;
		632
		633	while (started > wanted)
		634	end_thread ();
		635	}
		636
		637	static void poll_wait ()
		638	{
		639	fd_set rfd;
		640
		641	while (nreqs)
		642	{
		643	int size;
		644	if (WORDREAD_UNSAFE) LOCK (reslock);
		645	size = res_queue.size;
		646	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		647
		648	if (size)
		649	return;
		650
		651	maybe_start_thread ();
		652
		653	FD_ZERO(&rfd);
		654	FD_SET(respipe [0], &rfd);
		655
		656	select (respipe [0] + 1, &rfd, 0, 0, 0);
		657	}
		658	}
		659
		660	static int poll_cb (int max)
		661	{
		662	dSP;
		663	int count = 0;
		664	int do_croak = 0;
		665	aio_req req;
		666
		667	for (;;)
		668	{
		669	while (max <= 0 || count < max)
		670	{
		671	maybe_start_thread ();
		672
		673	LOCK (reslock);
		674	req = reqq_shift (&res_queue);
		675
		676	if (req)
		677	{
		678	--npending;
		679
		680	if (!res_queue.size)
		681	{
		682	/* read any signals sent by the worker threads */
		683	char buf [32];
		684	while (read (respipe [0], buf, 32) == 32)
		685	;
		686	}
		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);
		722	}
		723
224	while (nreqs > max_outstanding)	724	if (nreqs <= max_outstanding)
225	{	725	break;
		726
226	poll_wait ();	727	poll_wait ();
227	poll_cb ();
228	}
229	}
230		728
231	static void	729	max = 0;
232	end_thread (void)
233	{
234	aio_req req;
235	New (0, req, 1, aio_cb);
236	req->type = REQ_QUIT;
237
238	send_req (req);
239	}
240
241
242	static void min_parallel (int nthreads)
243	{
244	while (nthreads > started)
245	start_thread ();
246	}
247
248	static void max_parallel (int nthreads)
249	{
250	int cur = started;
251	while (cur > nthreads)
252	{
253	end_thread ();
254	cur--;
255	}
256
257	while (started > nthreads)
258	{
259	poll_wait ();
260	poll_cb ();
261	}
262	}
263
264	static int fork_started;
265
266	static void atfork_prepare (void)
267	{
268	pthread_mutex_lock (&frklock);
269
270	fork_started = started;
271
272	for (;;) {
273	while (nreqs)
274	{
275	poll_wait ();
276	poll_cb ();
277	}	730	}
278		731
279	max_parallel (0);	732	return count;
280
281	pthread_mutex_lock (&reqlock);
282
283	if (!nreqs && !started)
284	break;
285
286	pthread_mutex_unlock (&reqlock);
287
288	min_parallel (fork_started);
289	}
290
291	pthread_mutex_lock (&reslock);
292
293	assert (!started);
294	assert (!nreqs);
295	assert (!reqs && !reqe);
296	assert (!ress && !rese);
297	}	733	}
298		734
299	static void atfork_parent (void)	735	static void create_pipe ()
300	{	736	{
301	pthread_mutex_unlock (&reslock);	737	if (pipe (respipe))
302	min_parallel (fork_started);	738	croak ("unable to initialize result pipe");
303	pthread_mutex_unlock (&reqlock);
304	pthread_mutex_unlock (&frklock);
305	}
306		739
307	static void atfork_child (void)	740	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
308	{	741	croak ("cannot set result pipe to nonblocking mode");
309	reqs = reqe = 0;
310		742
311	atfork_parent ();	743	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		744	croak ("cannot set result pipe to nonblocking mode");
312	}	745	}
313		746
314	/*****************************************************************************/	747	/*****************************************************************************/
315	/* work around various missing functions */	748	/* work around various missing functions */
316		749
…		…
321	/*	754	/*
322	* make our pread/pwrite safe against themselves, but not against	755	* make our pread/pwrite safe against themselves, but not against
323	* normal read/write by using a mutex. slows down execution a lot,	756	* normal read/write by using a mutex. slows down execution a lot,
324	* but that's your problem, not mine.	757	* but that's your problem, not mine.
325	*/	758	*/
326	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	759	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
327		760
328	static ssize_t	761	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
329	pread (int fd, void *buf, size_t count, off_t offset)
330	{	762	{
331	ssize_t res;	763	ssize_t res;
332	off_t ooffset;	764	off_t ooffset;
333		765
334	pthread_mutex_lock (&iolock);	766	LOCK (preadwritelock);
335	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
336	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
337	res = read (fd, buf, count);	769	res = read (fd, buf, count);
338	lseek (fd, ooffset, SEEK_SET);	770	lseek (fd, ooffset, SEEK_SET);
339	pthread_mutex_unlock (&iolock);	771	UNLOCK (preadwritelock);
340		772
341	return res;	773	return res;
342	}	774	}
343		775
344	static ssize_t
345	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)
346	{	777	{
347	ssize_t res;	778	ssize_t res;
348	off_t ooffset;	779	off_t ooffset;
349		780
350	pthread_mutex_lock (&iolock);	781	LOCK (preadwritelock);
351	ooffset = lseek (fd, 0, SEEK_CUR);	782	ooffset = lseek (fd, 0, SEEK_CUR);
352	lseek (fd, offset, SEEK_SET);	783	lseek (fd, offset, SEEK_SET);
353	res = write (fd, buf, count);	784	res = write (fd, buf, count);
354	lseek (fd, offset, SEEK_SET);	785	lseek (fd, offset, SEEK_SET);
355	pthread_mutex_unlock (&iolock);	786	UNLOCK (preadwritelock);
356		787
357	return res;	788	return res;
358	}	789	}
359	#endif	790	#endif
360		791
361	#if !HAVE_FDATASYNC	792	#if !HAVE_FDATASYNC
362	# define fdatasync fsync	793	# define fdatasync fsync
363	#endif	794	#endif
364		795
365	#if !HAVE_READAHEAD	796	#if !HAVE_READAHEAD
366	# define readahead aio_readahead	797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
367		798
368	static char readahead_buf[4096];	799	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
369
370	static ssize_t
371	readahead (int fd, off_t offset, size_t count)
372	{	800	{
		801	dBUF;
		802
373	while (count > 0)	803	while (count > 0)
374	{	804	{
375	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
376		806
377	pread (fd, readahead_buf, len, offset);	807	pread (fd, aio_buf, len, offset);
378	offset += len;	808	offset += len;
379	count -= len;	809	count -= len;
380	}	810	}
381		811
382	errno = 0;	812	errno = 0;
383	}	813	}
		814
		815	#endif
		816
		817	#if !HAVE_READDIR_R
		818	# define readdir_r aio_readdir_r
		819
		820	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		821
		822	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		823	{
		824	struct dirent *e;
		825	int errorno;
		826
		827	LOCK (readdirlock);
		828
		829	e = readdir (dirp);
		830	errorno = errno;
		831
		832	if (e)
		833	{
		834	*res = ent;
		835	strcpy (ent->d_name, e->d_name);
		836	}
		837	else
		838	*res = 0;
		839
		840	UNLOCK (readdirlock);
		841
		842	errno = errorno;
		843	return e ? 0 : -1;
		844	}
		845	#endif
		846
		847	/* sendfile always needs emulation */
		848	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
		849	{
		850	ssize_t res;
		851
		852	if (!count)
		853	return 0;
		854
		855	#if HAVE_SENDFILE
		856	# if __linux
		857	res = sendfile (ofd, ifd, &offset, count);
		858
		859	# elif __freebsd
		860	/*
		861	* Of course, the freebsd sendfile is a dire hack with no thoughts
		862	* wasted on making it similar to other I/O functions.
		863	*/
		864	{
		865	off_t sbytes;
		866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		867
		868	if (res < 0 && sbytes)
		869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
		870	res = sbytes;
		871	}
		872
		873	# elif __hpux
		874	res = sendfile (ofd, ifd, offset, count, 0, 0);
		875
		876	# elif __solaris
		877	{
		878	struct sendfilevec vec;
		879	size_t sbytes;
		880
		881	vec.sfv_fd = ifd;
		882	vec.sfv_flag = 0;
		883	vec.sfv_off = offset;
		884	vec.sfv_len = count;
		885
		886	res = sendfilev (ofd, &vec, 1, &sbytes);
		887
		888	if (res < 0 && sbytes)
		889	res = sbytes;
		890	}
		891
384	#endif	892	# endif
		893	#else
		894	res = -1;
		895	errno = ENOSYS;
		896	#endif
		897
		898	if (res < 0
		899	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		900	#if __solaris
		901	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		902	#endif
		903	)
		904	)
		905	{
		906	/* emulate sendfile. this is a major pain in the ass */
		907	dBUF;
		908
		909	res = 0;
		910
		911	while (count)
		912	{
		913	ssize_t cnt;
		914
		915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
		916
		917	if (cnt <= 0)
		918	{
		919	if (cnt && !res) res = -1;
		920	break;
		921	}
		922
		923	cnt = write (ofd, aio_buf, cnt);
		924
		925	if (cnt <= 0)
		926	{
		927	if (cnt && !res) res = -1;
		928	break;
		929	}
		930
		931	offset += cnt;
		932	res += cnt;
		933	count -= cnt;
		934	}
		935	}
		936
		937	return res;
		938	}
		939
		940	/* read a full directory */
		941	static void scandir_ (aio_req req, worker *self)
		942	{
		943	DIR *dirp;
		944	union
		945	{
		946	struct dirent d;
		947	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		948	} *u;
		949	struct dirent *entp;
		950	char *name, *names;
		951	int memlen = 4096;
		952	int memofs = 0;
		953	int res = 0;
		954	int errorno;
		955
		956	LOCK (wrklock);
		957	self->dirp = dirp = opendir (req->dataptr);
		958	self->dbuf = u = malloc (sizeof (*u));
		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	}
385		1000
386	/*****************************************************************************/	1001	/*****************************************************************************/
387		1002
388	static void *
389	aio_proc (void *thr_arg)	1003	static void *aio_proc (void *thr_arg)
390	{	1004	{
391	aio_req req;	1005	aio_req req;
392	int type;	1006	worker *self = (worker *)thr_arg;
393		1007
394	do	1008	for (;;)
395	{	1009	{
396	pthread_mutex_lock (&reqlock);	1010	LOCK (reqlock);
397		1011
398	for (;;)	1012	for (;;)
399	{	1013	{
400	req = reqs;	1014	self->req = req = reqq_shift (&req_queue);
401
402	if (reqs)
403	{
404	reqs = reqs->next;
405	if (!reqs) reqe = 0;
406	}
407		1015
408	if (req)	1016	if (req)
409	break;	1017	break;
410		1018
411	pthread_cond_wait (&reqwait, &reqlock);	1019	pthread_cond_wait (&reqwait, &reqlock);
412	}	1020	}
413		1021
414	pthread_mutex_unlock (&reqlock);	1022	--nready;
		1023
		1024	UNLOCK (reqlock);
415		1025
416	errno = 0; /* strictly unnecessary */	1026	errno = 0; /* strictly unnecessary */
417		1027
418	type = req->type;	1028	if (!(req->flags & FLAG_CANCELLED))
419
420	switch (type)	1029	switch (req->type)
421	{	1030	{
422	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;
423	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;
424		1033
425	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;
		1035	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
426		1036
427	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
428	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
429	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
430		1040
431	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1041	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
432	case REQ_CLOSE: req->result = close (req->fd); break;	1042	case REQ_CLOSE: req->result = close (req->fd); break;
433	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1043	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
434	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1044	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		1045	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		1046	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
435	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1047	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
436		1048
437	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1049	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
438	case REQ_FSYNC: req->result = fsync (req->fd); break;	1050	case REQ_FSYNC: req->result = fsync (req->fd); break;
		1051	case REQ_READDIR: scandir_ (req, self); break;
439		1052
		1053	case REQ_BUSY:
		1054	{
		1055	struct timeval tv;
		1056
		1057	tv.tv_sec = req->fd;
		1058	tv.tv_usec = req->fd2;
		1059
		1060	req->result = select (0, 0, 0, 0, &tv);
		1061	}
		1062
		1063	case REQ_GROUP:
		1064	case REQ_NOP:
		1065	break;
		1066
440	case REQ_QUIT:	1067	case REQ_QUIT:
441	break;	1068	LOCK (wrklock);
		1069	worker_free (self);
		1070	--started;
		1071	UNLOCK (wrklock);
		1072	return 0;
442		1073
443	default:	1074	default:
444	req->result = ENOSYS;	1075	req->result = ENOSYS;
445	break;	1076	break;
446	}	1077	}
447		1078
448	req->errorno = errno;	1079	req->errorno = errno;
449		1080
450	pthread_mutex_lock (&reslock);	1081	LOCK (reslock);
451		1082
452	req->next = 0;	1083	++npending;
453		1084
454	if (rese)	1085	if (!reqq_push (&res_queue, req))
455	{
456	rese->next = req;
457	rese = req;
458	}
459	else
460	{
461	rese = ress = req;
462
463	/* write a dummy byte to the pipe so fh becomes ready */	1086	/* write a dummy byte to the pipe so fh becomes ready */
464	write (respipe [1], &respipe, 1);	1087	write (respipe [1], &respipe, 1);
465	}
466		1088
467	pthread_mutex_unlock (&reslock);	1089	self->req = 0;
		1090	worker_clear (self);
		1091
		1092	UNLOCK (reslock);
		1093	}
		1094	}
		1095
		1096	/*****************************************************************************/
		1097
		1098	static void atfork_prepare (void)
		1099	{
		1100	LOCK (wrklock);
		1101	LOCK (reqlock);
		1102	LOCK (reslock);
		1103	#if !HAVE_PREADWRITE
		1104	LOCK (preadwritelock);
		1105	#endif
		1106	#if !HAVE_READDIR_R
		1107	LOCK (readdirlock);
		1108	#endif
		1109	}
		1110
		1111	static void atfork_parent (void)
		1112	{
		1113	#if !HAVE_READDIR_R
		1114	UNLOCK (readdirlock);
		1115	#endif
		1116	#if !HAVE_PREADWRITE
		1117	UNLOCK (preadwritelock);
		1118	#endif
		1119	UNLOCK (reslock);
		1120	UNLOCK (reqlock);
		1121	UNLOCK (wrklock);
		1122	}
		1123
		1124	static void atfork_child (void)
		1125	{
		1126	aio_req prv;
		1127
		1128	while (prv = reqq_shift (&req_queue))
		1129	req_free (prv);
		1130
		1131	while (prv = reqq_shift (&res_queue))
		1132	req_free (prv);
		1133
		1134	while (wrk_first.next != &wrk_first)
468	}	1135	{
469	while (type != REQ_QUIT);	1136	worker *wrk = wrk_first.next;
470		1137
471	return 0;	1138	if (wrk->req)
		1139	req_free (wrk->req);
		1140
		1141	worker_clear (wrk);
		1142	worker_free (wrk);
		1143	}
		1144
		1145	started = 0;
		1146	nreqs = 0;
		1147
		1148	close (respipe [0]);
		1149	close (respipe [1]);
		1150	create_pipe ();
		1151
		1152	atfork_parent ();
472	}	1153	}
473		1154
474	#define dREQ \	1155	#define dREQ \
475	aio_req req; \	1156	aio_req req; \
		1157	int req_pri = next_pri; \
		1158	next_pri = DEFAULT_PRI + PRI_BIAS; \
476	\	1159	\
477	if (SvOK (callback) && !SvROK (callback)) \	1160	if (SvOK (callback) && !SvROK (callback)) \
478	croak ("clalback must be undef or of reference type"); \	1161	croak ("callback must be undef or of reference type"); \
479	\	1162	\
480	Newz (0, req, 1, aio_cb); \	1163	Newz (0, req, 1, aio_cb); \
481	if (!req) \	1164	if (!req) \
482	croak ("out of memory during aio_req allocation"); \	1165	croak ("out of memory during aio_req allocation"); \
483	\	1166	\
484	req->callback = SvREFCNT_inc (callback);	1167	req->callback = newSVsv (callback); \
		1168	req->pri = req_pri
		1169
		1170	#define REQ_SEND \
		1171	req_send (req); \
		1172	\
		1173	if (GIMME_V != G_VOID) \
		1174	XPUSHs (req_sv (req, AIO_REQ_KLASS));
485		1175
486	MODULE = IO::AIO PACKAGE = IO::AIO	1176	MODULE = IO::AIO PACKAGE = IO::AIO
487		1177
488	PROTOTYPES: ENABLE	1178	PROTOTYPES: ENABLE
489		1179
490	BOOT:	1180	BOOT:
491	{	1181	{
492	if (pipe (respipe))	1182	HV *stash = gv_stashpv ("IO::AIO", 1);
493	croak ("unable to initialize result pipe");	1183	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1184	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1185	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
494		1186
495	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	1187	create_pipe ();
496	croak ("cannot set result pipe to nonblocking mode");
497
498	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
499	croak ("cannot set result pipe to nonblocking mode");
500
501	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1188	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
502	}
503		1189
		1190	start_thread ();
		1191	}
		1192
504	void	1193	void
505	min_parallel(nthreads)	1194	min_parallel (int nthreads)
506	int nthreads
507	PROTOTYPE: $	1195	PROTOTYPE: $
508		1196
509	void	1197	void
510	max_parallel(nthreads)	1198	max_parallel (int nthreads)
511	int nthreads
512	PROTOTYPE: $	1199	PROTOTYPE: $
513		1200
514	int	1201	int
515	max_outstanding(nreqs)	1202	max_outstanding (int maxreqs)
516	int nreqs	1203	PROTOTYPE: $
517	PROTOTYPE: $
518	CODE:	1204	CODE:
519	RETVAL = max_outstanding;	1205	RETVAL = max_outstanding;
520	max_outstanding = nreqs;	1206	max_outstanding = maxreqs;
		1207	OUTPUT:
		1208	RETVAL
521		1209
522	void	1210	void
523	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1211	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
524	SV * pathname	1212	SV * pathname
525	int flags	1213	int flags
526	int mode	1214	int mode
527	SV * callback	1215	SV * callback
528	PROTOTYPE: $$$;$	1216	PROTOTYPE: $$$;$
529	CODE:	1217	PPCODE:
530	{	1218	{
531	dREQ;	1219	dREQ;
532		1220
533	req->type = REQ_OPEN;	1221	req->type = REQ_OPEN;
534	req->data = newSVsv (pathname);	1222	req->data = newSVsv (pathname);
535	req->dataptr = SvPVbyte_nolen (req->data);	1223	req->dataptr = SvPVbyte_nolen (req->data);
536	req->fd = flags;	1224	req->fd = flags;
537	req->mode = mode;	1225	req->mode = mode;
538		1226
539	send_req (req);	1227	REQ_SEND;
540	}	1228	}
541		1229
542	void	1230	void
543	aio_close(fh,callback=&PL_sv_undef)	1231	aio_close (fh,callback=&PL_sv_undef)
544	SV * fh	1232	SV * fh
545	SV * callback	1233	SV * callback
546	PROTOTYPE: $;$	1234	PROTOTYPE: $;$
547	ALIAS:	1235	ALIAS:
548	aio_close = REQ_CLOSE	1236	aio_close = REQ_CLOSE
549	aio_fsync = REQ_FSYNC	1237	aio_fsync = REQ_FSYNC
550	aio_fdatasync = REQ_FDATASYNC	1238	aio_fdatasync = REQ_FDATASYNC
551	CODE:	1239	PPCODE:
552	{	1240	{
553	dREQ;	1241	dREQ;
554		1242
555	req->type = ix;	1243	req->type = ix;
556	req->fh = newSVsv (fh);	1244	req->fh = newSVsv (fh);
557	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1245	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
558		1246
559	send_req (req);	1247	REQ_SEND (req);
560	}	1248	}
561		1249
562	void	1250	void
563	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1251	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
564	SV * fh	1252	SV * fh
565	UV offset	1253	UV offset
566	IV length	1254	UV length
567	SV * data	1255	SV * data
568	IV dataoffset	1256	UV dataoffset
569	SV * callback	1257	SV * callback
570	ALIAS:	1258	ALIAS:
571	aio_read = REQ_READ	1259	aio_read = REQ_READ
572	aio_write = REQ_WRITE	1260	aio_write = REQ_WRITE
573	PROTOTYPE: $$$$$;$	1261	PROTOTYPE: $$$$$;$
574	CODE:	1262	PPCODE:
575	{	1263	{
576	aio_req req;	1264	aio_req req;
577	STRLEN svlen;	1265	STRLEN svlen;
578	char *svptr = SvPVbyte (data, svlen);	1266	char *svptr = SvPVbyte (data, svlen);
579		1267
…		…
610	: IoOFP (sv_2io (fh)));	1298	: IoOFP (sv_2io (fh)));
611	req->offset = offset;	1299	req->offset = offset;
612	req->length = length;	1300	req->length = length;
613	req->data = SvREFCNT_inc (data);	1301	req->data = SvREFCNT_inc (data);
614	req->dataptr = (char *)svptr + dataoffset;	1302	req->dataptr = (char *)svptr + dataoffset;
615	req->callback = SvREFCNT_inc (callback);
616		1303
617	send_req (req);	1304	if (!SvREADONLY (data))
		1305	{
		1306	SvREADONLY_on (data);
		1307	req->data2ptr = (void *)data;
		1308	}
		1309
		1310	REQ_SEND;
618	}	1311	}
619	}	1312	}
620		1313
621	void	1314	void
		1315	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1316	SV * out_fh
		1317	SV * in_fh
		1318	UV in_offset
		1319	UV length
		1320	SV * callback
		1321	PROTOTYPE: $$$$;$
		1322	PPCODE:
		1323	{
		1324	dREQ;
		1325
		1326	req->type = REQ_SENDFILE;
		1327	req->fh = newSVsv (out_fh);
		1328	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1329	req->fh2 = newSVsv (in_fh);
		1330	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1331	req->offset = in_offset;
		1332	req->length = length;
		1333
		1334	REQ_SEND;
		1335	}
		1336
		1337	void
622	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1338	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
623	SV * fh	1339	SV * fh
624	UV offset	1340	UV offset
625	IV length	1341	IV length
626	SV * callback	1342	SV * callback
627	PROTOTYPE: $$$;$	1343	PROTOTYPE: $$$;$
628	CODE:	1344	PPCODE:
629	{	1345	{
630	dREQ;	1346	dREQ;
631		1347
632	req->type = REQ_READAHEAD;	1348	req->type = REQ_READAHEAD;
633	req->fh = newSVsv (fh);	1349	req->fh = newSVsv (fh);
634	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1350	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
635	req->offset = offset;	1351	req->offset = offset;
636	req->length = length;	1352	req->length = length;
637		1353
638	send_req (req);	1354	REQ_SEND;
639	}	1355	}
640		1356
641	void	1357	void
642	aio_stat(fh_or_path,callback=&PL_sv_undef)	1358	aio_stat (fh_or_path,callback=&PL_sv_undef)
643	SV * fh_or_path	1359	SV * fh_or_path
644	SV * callback	1360	SV * callback
645	ALIAS:	1361	ALIAS:
646	aio_stat = REQ_STAT	1362	aio_stat = REQ_STAT
647	aio_lstat = REQ_LSTAT	1363	aio_lstat = REQ_LSTAT
648	CODE:	1364	PPCODE:
649	{	1365	{
650	dREQ;	1366	dREQ;
651		1367
652	New (0, req->statdata, 1, Stat_t);	1368	New (0, req->statdata, 1, Stat_t);
653	if (!req->statdata)	1369	if (!req->statdata)
		1370	{
		1371	req_free (req);
654	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");	1372	croak ("out of memory during aio_req->statdata allocation");
		1373	}
655		1374
656	if (SvPOK (fh_or_path))	1375	if (SvPOK (fh_or_path))
657	{	1376	{
658	req->type = ix;	1377	req->type = ix;
659	req->data = newSVsv (fh_or_path);	1378	req->data = newSVsv (fh_or_path);
…		…
664	req->type = REQ_FSTAT;	1383	req->type = REQ_FSTAT;
665	req->fh = newSVsv (fh_or_path);	1384	req->fh = newSVsv (fh_or_path);
666	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1385	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
667	}	1386	}
668		1387
669	send_req (req);	1388	REQ_SEND;
670	}	1389	}
671		1390
672	void	1391	void
673	aio_unlink(pathname,callback=&PL_sv_undef)	1392	aio_unlink (pathname,callback=&PL_sv_undef)
674	SV * pathname	1393	SV * pathname
675	SV * callback	1394	SV * callback
676	ALIAS:	1395	ALIAS:
677	aio_unlink = REQ_UNLINK	1396	aio_unlink = REQ_UNLINK
678	aio_rmdir = REQ_RMDIR	1397	aio_rmdir = REQ_RMDIR
		1398	aio_readdir = REQ_READDIR
679	CODE:	1399	PPCODE:
680	{	1400	{
681	dREQ;	1401	dREQ;
682		1402
683	req->type = ix;	1403	req->type = ix;
684	req->data = newSVsv (pathname);	1404	req->data = newSVsv (pathname);
685	req->dataptr = SvPVbyte_nolen (req->data);	1405	req->dataptr = SvPVbyte_nolen (req->data);
686		1406
687	send_req (req);	1407	REQ_SEND;
688	}	1408	}
689		1409
690	void	1410	void
691	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1411	aio_link (oldpath,newpath,callback=&PL_sv_undef)
692	SV * oldpath	1412	SV * oldpath
693	SV * newpath	1413	SV * newpath
694	SV * callback	1414	SV * callback
		1415	ALIAS:
		1416	aio_link = REQ_LINK
		1417	aio_symlink = REQ_SYMLINK
		1418	aio_rename = REQ_RENAME
695	CODE:	1419	PPCODE:
696	{	1420	{
697	dREQ;	1421	dREQ;
698		1422
699	req->type = REQ_SYMLINK;	1423	req->type = ix;
700	req->fh = newSVsv (oldpath);	1424	req->fh = newSVsv (oldpath);
701	req->data2ptr = SvPVbyte_nolen (req->fh);	1425	req->data2ptr = SvPVbyte_nolen (req->fh);
702	req->data = newSVsv (newpath);	1426	req->data = newSVsv (newpath);
703	req->dataptr = SvPVbyte_nolen (req->data);	1427	req->dataptr = SvPVbyte_nolen (req->data);
704		1428
705	send_req (req);	1429	REQ_SEND;
706	}	1430	}
707		1431
708	void	1432	void
		1433	aio_busy (delay,callback=&PL_sv_undef)
		1434	double delay
		1435	SV * callback
		1436	PPCODE:
		1437	{
		1438	dREQ;
		1439
		1440	req->type = REQ_BUSY;
		1441	req->fd = delay < 0. ? 0 : delay;
		1442	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1443
		1444	REQ_SEND;
		1445	}
		1446
		1447	void
		1448	aio_group (callback=&PL_sv_undef)
		1449	SV * callback
		1450	PROTOTYPE: ;$
		1451	PPCODE:
		1452	{
		1453	dREQ;
		1454
		1455	req->type = REQ_GROUP;
		1456	req_send (req);
		1457
		1458	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1459	}
		1460
		1461	void
		1462	aio_nop (callback=&PL_sv_undef)
		1463	SV * callback
		1464	PPCODE:
		1465	{
		1466	dREQ;
		1467
		1468	req->type = REQ_NOP;
		1469
		1470	REQ_SEND;
		1471	}
		1472
		1473	int
		1474	aioreq_pri (int pri = 0)
		1475	PROTOTYPE: ;$
		1476	CODE:
		1477	RETVAL = next_pri - PRI_BIAS;
		1478	if (items > 0)
		1479	{
		1480	if (pri < PRI_MIN) pri = PRI_MIN;
		1481	if (pri > PRI_MAX) pri = PRI_MAX;
		1482	next_pri = pri + PRI_BIAS;
		1483	}
		1484	OUTPUT:
		1485	RETVAL
		1486
		1487	void
		1488	aioreq_nice (int nice = 0)
		1489	CODE:
		1490	nice = next_pri - nice;
		1491	if (nice < PRI_MIN) nice = PRI_MIN;
		1492	if (nice > PRI_MAX) nice = PRI_MAX;
		1493	next_pri = nice + PRI_BIAS;
		1494
		1495	void
709	flush()	1496	flush ()
710	PROTOTYPE:	1497	PROTOTYPE:
711	CODE:	1498	CODE:
712	while (nreqs)	1499	while (nreqs)
713	{	1500	{
714	poll_wait ();	1501	poll_wait ();
715	poll_cb ();	1502	poll_cb (0);
716	}	1503	}
717		1504
718	void	1505	void
719	poll()	1506	poll()
720	PROTOTYPE:	1507	PROTOTYPE:
721	CODE:	1508	CODE:
722	if (nreqs)	1509	if (nreqs)
723	{	1510	{
724	poll_wait ();	1511	poll_wait ();
725	poll_cb ();	1512	poll_cb (0);
726	}	1513	}
727		1514
728	int	1515	int
729	poll_fileno()	1516	poll_fileno()
730	PROTOTYPE:	1517	PROTOTYPE:
…		…
735		1522
736	int	1523	int
737	poll_cb(...)	1524	poll_cb(...)
738	PROTOTYPE:	1525	PROTOTYPE:
739	CODE:	1526	CODE:
740	RETVAL = poll_cb ();	1527	RETVAL = poll_cb (0);
		1528	OUTPUT:
		1529	RETVAL
		1530
		1531	int
		1532	poll_some(int max = 0)
		1533	PROTOTYPE: $
		1534	CODE:
		1535	RETVAL = poll_cb (max);
741	OUTPUT:	1536	OUTPUT:
742	RETVAL	1537	RETVAL
743		1538
744	void	1539	void
745	poll_wait()	1540	poll_wait()
…		…
754	CODE:	1549	CODE:
755	RETVAL = nreqs;	1550	RETVAL = nreqs;
756	OUTPUT:	1551	OUTPUT:
757	RETVAL	1552	RETVAL
758		1553
		1554	int
		1555	nready()
		1556	PROTOTYPE:
		1557	CODE:
		1558	RETVAL = get_nready ();
		1559	OUTPUT:
		1560	RETVAL
		1561
		1562	int
		1563	npending()
		1564	PROTOTYPE:
		1565	CODE:
		1566	RETVAL = get_npending ();
		1567	OUTPUT:
		1568	RETVAL
		1569
		1570	PROTOTYPES: DISABLE
		1571
		1572	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1573
		1574	void
		1575	cancel (aio_req_ornot req)
		1576	CODE:
		1577	req_cancel (req);
		1578
		1579	void
		1580	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1581	CODE:
		1582	SvREFCNT_dec (req->callback);
		1583	req->callback = newSVsv (callback);
		1584
		1585	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1586
		1587	void
		1588	add (aio_req grp, ...)
		1589	PPCODE:
		1590	{
		1591	int i;
		1592	aio_req req;
		1593
		1594	if (grp->fd == 2)
		1595	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1596
		1597	for (i = 1; i < items; ++i )
		1598	{
		1599	if (GIMME_V != G_VOID)
		1600	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1601
		1602	req = SvAIO_REQ (ST (i));
		1603
		1604	if (req)
		1605	{
		1606	++grp->length;
		1607	req->grp = grp;
		1608
		1609	req->grp_prev = 0;
		1610	req->grp_next = grp->grp_first;
		1611
		1612	if (grp->grp_first)
		1613	grp->grp_first->grp_prev = req;
		1614
		1615	grp->grp_first = req;
		1616	}
		1617	}
		1618	}
		1619
		1620	void
		1621	cancel_subs (aio_req_ornot req)
		1622	CODE:
		1623	req_cancel_subs (req);
		1624
		1625	void
		1626	result (aio_req grp, ...)
		1627	CODE:
		1628	{
		1629	int i;
		1630	AV *av;
		1631
		1632	grp->errorno = errno;
		1633
		1634	av = newAV ();
		1635
		1636	for (i = 1; i < items; ++i )
		1637	av_push (av, newSVsv (ST (i)));
		1638
		1639	SvREFCNT_dec (grp->data);
		1640	grp->data = (SV *)av;
		1641	}
		1642
		1643	void
		1644	errno (aio_req grp, int errorno = errno)
		1645	CODE:
		1646	grp->errorno = errorno;
		1647
		1648	void
		1649	limit (aio_req grp, int limit)
		1650	CODE:
		1651	grp->fd2 = limit;
		1652	aio_grp_feed (grp);
		1653
		1654	void
		1655	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1656	CODE:
		1657	{
		1658	SvREFCNT_dec (grp->fh2);
		1659	grp->fh2 = newSVsv (callback);
		1660
		1661	if (grp->fd2 <= 0)
		1662	grp->fd2 = 2;
		1663
		1664	aio_grp_feed (grp);
		1665	}
		1666

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