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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.35 by root, Tue Aug 23 01:16:50 2005 UTC vs.
Revision 1.116 by root, Sat May 10 19:25:33 2008 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"
9
10	#include <pthread.h>	9	#include <stddef.h>
11		10	#include <stdlib.h>
		11	#include <errno.h>
12	#include <sys/types.h>	12	#include <sys/types.h>
13	#include <sys/stat.h>	13	#include <sys/stat.h>
14
15	#include <unistd.h>	14	#include <limits.h>
16	#include <fcntl.h>	15	#include <fcntl.h>
17	#include <signal.h>
18	#include <sched.h>	16	#include <sched.h>
19		17
20	#if HAVE_SENDFILE	18	#ifdef _WIN32
21	# if __linux	19
22	# include <sys/sendfile.h>	20	# define EIO_STRUCT_DIRENT Direntry_t
23	# elif __freebsd	21	# undef malloc
24	# include <sys/socket.h>	22	# undef free
25	# include <sys/uio.h>	23
26	# elif __hpux	24	// perl overrides all those nice win32 functions
27	# include <sys/socket.h>	25	# undef open
28	# elif __solaris /* not yet */	26	# undef read
29	# include <sys/sendfile.h>	27	# undef write
		28	# undef send
		29	# undef recv
		30	# undef stat
		31	# undef fstat
		32	# define lstat stat
		33	# undef truncate
		34	# undef ftruncate
		35	# undef open
		36	# undef close
		37	# undef unlink
		38	# undef rmdir
		39	# undef rename
		40	# undef lseek
		41
		42	# define chown(a,b,c) (errno = ENOSYS, -1)
		43	# define fchown(a,b,c) (errno = ENOSYS, -1)
		44	# define fchmod(a,b) (errno = ENOSYS, -1)
		45	# define symlink(a,b) (errno = ENOSYS, -1)
		46	# define readlink(a,b,c) (errno = ENOSYS, -1)
		47	# define mknod(a,b,c) (errno = ENOSYS, -1)
		48	# define truncate(a,b) (errno = ENOSYS, -1)
		49	# define ftruncate(fd,o) chsize ((fd), (o))
		50	# define fsync(fd) _commit (fd)
		51	# define opendir(fd) (errno = ENOSYS, 0)
		52	# define readdir(fd) (errno = ENOSYS, -1)
		53	# define closedir(fd) (errno = ENOSYS, -1)
		54	# define mkdir(a,b) mkdir (a)
		55
30	# else	56	#else
31	# error sendfile support requested but not available	57
32	# endif	58	# include <sys/time.h>
		59	# include <sys/select.h>
		60	# include <unistd.h>
		61	# include <utime.h>
		62	# include <signal.h>
		63	# define EIO_STRUCT_DIRENT struct dirent
		64
33	#endif	65	#endif
34		66
35	#if __ia64	67	#define EIO_STRUCT_STAT Stat_t
36	# define STACKSIZE 65536	68
		69	/* use NV for 32 bit perls as it allows larger offsets */
		70	#if IVSIZE >= 8
		71	# define SvVAL64 SvIV
37	#else	72	#else
38	# define STACKSIZE 4096	73	# define SvVAL64 SvNV
39	#endif	74	#endif
40		75
		76	static HV *stash;
		77	typedef SV SV8; /* byte-sv, used for argument-checking */
		78
		79	#define AIO_REQ_KLASS "IO::AIO::REQ"
		80	#define AIO_GRP_KLASS "IO::AIO::GRP"
		81
		82	#define EIO_COMMON \
		83	SV *callback; \
		84	SV *sv1, *sv2; \
		85	STRLEN stroffset; \
		86	SV *self
		87
		88	#include "libeio/eio.h"
		89
		90	static int req_invoke (eio_req *req);
		91	#define EIO_FINISH(req) req_invoke (req)
		92	static void aio_grp_feed (eio_req *grp);
		93	#define EIO_FEED(req) aio_grp_feed (req)
		94	static void req_destroy (eio_req *grp);
		95	#define EIO_DESTROY(req) req_destroy (req)
		96
41	enum {	97	enum {
42	REQ_QUIT,	98	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
43	REQ_OPEN, REQ_CLOSE,
44	REQ_READ, REQ_WRITE, REQ_READAHEAD,
45	REQ_SENDFILE,
46	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
47	REQ_FSYNC, REQ_FDATASYNC,
48	REQ_UNLINK, REQ_RMDIR,
49	REQ_SYMLINK,
50	};	99	};
51		100
52	typedef struct aio_cb {	101	#include "libeio/eio.c"
53	struct aio_cb *volatile next;
54		102
55	int type;
56
57	int fd, fd2;
58	off_t offset;
59	size_t length;
60	ssize_t result;
61	mode_t mode; /* open */
62	int errorno;
63	SV *data, *callback;
64	SV *fh, *fh2;
65	void *dataptr, *data2ptr;
66	STRLEN dataoffset;
67
68	Stat_t *statdata;
69	} aio_cb;
70
71	typedef aio_cb *aio_req;	103	typedef eio_req *aio_req;
		104	typedef eio_req *aio_req_ornot;
72		105
73	static int started, wanted;
74	static volatile int nreqs;
75	static int max_outstanding = 1<<30;	106	static int max_outstanding = 0;
76	static int respipe [2];
77		107
78	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	108	static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
79	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
80	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
81		109
82	static volatile aio_req reqs, reqe; /* queue start, queue end */	110	static int respipe_osf [2], respipe [2] = { -1, -1 };
83	static volatile aio_req ress, rese; /* queue start, queue end */
84		111
		112	static void req_destroy (aio_req req);
85	static void free_req (aio_req req)	113	static void req_cancel (aio_req req);
86	{
87	if (req->data)
88	SvREFCNT_dec (req->data);
89		114
		115	static void want_poll (void)
		116	{
		117	/* write a dummy byte to the pipe so fh becomes ready */
		118	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		119	}
		120
		121	static void done_poll (void)
		122	{
		123	/* read any signals sent by the worker threads */
		124	char buf [4];
		125	while (respipe_read (respipe [0], buf, 4) == 4)
		126	;
		127	}
		128
		129	/* must be called at most once */
		130	static SV *req_sv (aio_req req, const char *klass)
		131	{
90	if (req->fh)	132	if (!req->self)
91	SvREFCNT_dec (req->fh);
92
93	if (req->fh2)
94	SvREFCNT_dec (req->fh2);
95
96	if (req->statdata)
97	Safefree (req->statdata);
98
99	if (req->callback)
100	SvREFCNT_dec (req->callback);
101
102	Safefree (req);
103	}
104
105	static void
106	poll_wait ()
107	{
108	if (nreqs && !ress)
109	{	133	{
110	fd_set rfd;	134	req->self = (SV *)newHV ();
111	FD_ZERO(&rfd);	135	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
112	FD_SET(respipe [0], &rfd);
113
114	select (respipe [0] + 1, &rfd, 0, 0, 0);
115	}	136	}
116	}
117		137
118	static int	138	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
119	poll_cb ()	139	}
		140
		141	static aio_req SvAIO_REQ (SV *sv)
		142	{
		143	MAGIC *mg;
		144
		145	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		146	croak ("object of class " AIO_REQ_KLASS " expected");
		147
		148	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		149
		150	return mg ? (aio_req)mg->mg_ptr : 0;
		151	}
		152
		153	static void aio_grp_feed (aio_req grp)
		154	{
		155	if (grp->sv2 && SvOK (grp->sv2))
		156	{
		157	dSP;
		158
		159	ENTER;
		160	SAVETMPS;
		161	PUSHMARK (SP);
		162	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		163	PUTBACK;
		164	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		165	SPAGAIN;
		166	FREETMPS;
		167	LEAVE;
		168	}
		169	}
		170
		171	static int req_invoke (eio_req *req)
120	{	172	{
121	dSP;	173	dSP;
122	int count = 0;
123	int do_croak = 0;
124	aio_req req;
125		174
126	for (;;)	175	if (req->flags & FLAG_SV2_RO_OFF)
		176	SvREADONLY_off (req->sv2);
		177
		178	if (!EIO_CANCELLED (req) && SvOK (req->callback))
127	{	179	{
128	pthread_mutex_lock (&reslock);	180	ENTER;
129	req = ress;	181	SAVETMPS;
		182	PUSHMARK (SP);
		183	EXTEND (SP, 1);
130		184
131	if (req)	185	switch (req->type)
132	{	186	{
133	ress = req->next;	187	case EIO_READDIR:
134
135	if (!ress)
136	{	188	{
137	/* read any signals sent by the worker threads */	189	SV *rv = &PL_sv_undef;
138	char buf [32];	190
139	while (read (respipe [0], buf, 32) == 32)	191	if (req->result >= 0)
140	;	192	{
		193	int i;
		194	char *buf = req->ptr2;
		195	AV *av = newAV ();
141		196
142	rese = 0;	197	av_extend (av, req->result - 1);
		198
		199	for (i = 0; i < req->result; ++i)
		200	{
		201	SV *sv = newSVpv (buf, 0);
		202
		203	av_store (av, i, sv);
		204	buf += SvCUR (sv) + 1;
		205	}
		206
		207	rv = sv_2mortal (newRV_noinc ((SV *)av));
		208	}
		209
		210	PUSHs (rv);
143	}	211	}
144	}
145
146	pthread_mutex_unlock (&reslock);
147
148	if (!req)
149	break;	212	break;
150		213
151	nreqs--;	214	case EIO_OPEN:
152
153	if (req->type == REQ_QUIT)
154	started--;
155	else
156	{
157	int errorno = errno;
158	errno = req->errorno;
159
160	if (req->type == REQ_READ)
161	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
162
163	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
164	SvREADONLY_off (req->data);
165
166	if (req->statdata)
167	{
168	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
169	PL_laststatval = req->result;
170	PL_statcache = *(req->statdata);
171	}
172
173	ENTER;
174	PUSHMARK (SP);
175	XPUSHs (sv_2mortal (newSViv (req->result)));
176
177	if (req->type == REQ_OPEN)
178	{	215	{
179	/* convert fd to fh */	216	/* convert fd to fh */
180	SV *fh;	217	SV *fh = &PL_sv_undef;
181		218
182	PUTBACK;	219	if (req->result >= 0)
183	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	220	{
184	SPAGAIN;	221	GV *gv = (GV *)sv_newmortal ();
		222	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		223	char sym [64];
		224	int symlen;
		225
		226	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		227	gv_init (gv, stash, sym, symlen, 0);
185		228
186	fh = SvREFCNT_inc (POPs);	229	symlen = snprintf (
		230	sym,
		231	sizeof (sym),
		232	"%s&=%d",
		233	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		234	req->result
		235	);
187		236
		237	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		238	fh = (SV *)gv;
		239	}
		240
188	PUSHMARK (SP);	241	PUSHs (fh);
189	XPUSHs (sv_2mortal (fh));
190	}	242	}
191
192	if (SvOK (req->callback))
193	{
194	PUTBACK;
195	call_sv (req->callback, G_VOID | G_EVAL);
196	SPAGAIN;
197
198	if (SvTRUE (ERRSV))
199	{
200	free_req (req);
201	croak (0);
202	}
203	}
204
205	LEAVE;
206
207	errno = errorno;
208	count++;
209	}
210
211	free_req (req);
212	}
213
214	return count;
215	}
216
217	static void *aio_proc(void *arg);
218
219	static void
220	start_thread (void)
221	{
222	sigset_t fullsigset, oldsigset;
223	pthread_t tid;
224	pthread_attr_t attr;
225
226	pthread_attr_init (&attr);
227	pthread_attr_setstacksize (&attr, STACKSIZE);
228	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
229
230	sigfillset (&fullsigset);
231	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
232
233	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
234	started++;
235
236	sigprocmask (SIG_SETMASK, &oldsigset, 0);
237	}
238
239	static void
240	send_req (aio_req req)
241	{
242	while (started < wanted && nreqs >= started)
243	start_thread ();
244
245	nreqs++;
246
247	pthread_mutex_lock (&reqlock);
248
249	req->next = 0;
250
251	if (reqe)
252	{
253	reqe->next = req;
254	reqe = req;
255	}
256	else
257	reqe = reqs = req;
258
259	pthread_cond_signal (&reqwait);
260	pthread_mutex_unlock (&reqlock);
261
262	if (nreqs > max_outstanding)
263	for (;;)
264	{
265	poll_cb ();
266
267	if (nreqs <= max_outstanding)
268	break;
269
270	poll_wait ();
271	}
272	}
273
274	static void
275	end_thread (void)
276	{
277	aio_req req;
278	Newz (0, req, 1, aio_cb);
279	req->type = REQ_QUIT;
280
281	send_req (req);
282	}
283
284	static void min_parallel (int nthreads)
285	{
286	if (wanted < nthreads)
287	wanted = nthreads;
288	}
289
290	static void max_parallel (int nthreads)
291	{
292	int cur = started;
293
294	if (wanted > nthreads)
295	wanted = nthreads;
296
297	while (cur > wanted)
298	{
299	end_thread ();
300	cur--;
301	}
302
303	while (started > wanted)
304	{
305	poll_wait ();
306	poll_cb ();
307	}
308	}
309
310	static void create_pipe ()
311	{
312	if (pipe (respipe))
313	croak ("unable to initialize result pipe");
314
315	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
316	croak ("cannot set result pipe to nonblocking mode");
317
318	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
319	croak ("cannot set result pipe to nonblocking mode");
320	}
321
322	static void atfork_prepare (void)
323	{
324	pthread_mutex_lock (&reqlock);
325	pthread_mutex_lock (&reslock);
326	}
327
328	static void atfork_parent (void)
329	{
330	pthread_mutex_unlock (&reslock);
331	pthread_mutex_unlock (&reqlock);
332	}
333
334	static void atfork_child (void)
335	{
336	aio_req prv;
337
338	started = 0;
339
340	while (reqs)
341	{
342	prv = reqs;
343	reqs = prv->next;
344	free_req (prv);
345	}
346
347	reqs = reqe = 0;
348
349	while (ress)
350	{
351	prv = ress;
352	ress = prv->next;
353	free_req (prv);
354	}
355
356	ress = rese = 0;
357
358	close (respipe [0]);
359	close (respipe [1]);
360	create_pipe ();
361
362	atfork_parent ();
363	}
364
365	/* currently noops */
366	#define LOCK_FD(fd) do { } while (0)
367	#define UNLOCK_FD(fd) do { } while (0)
368
369	/*****************************************************************************/
370	/* work around various missing functions */
371
372	#if !HAVE_PREADWRITE
373	# define pread aio_pread
374	# define pwrite aio_pwrite
375
376	/*
377	* make our pread/pwrite safe against themselves, but not against
378	* normal read/write by using a mutex. slows down execution a lot,
379	* but that's your problem, not mine.
380	*/
381	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
382
383	static ssize_t
384	pread (int fd, void *buf, size_t count, off_t offset)
385	{
386	ssize_t res;
387	off_t ooffset;
388
389	LOCK_FD (fd);
390	pthread_mutex_lock (&iolock); /* replace by LOCK_FD and private buffer */
391	ooffset = lseek (fd, 0, SEEK_CUR);
392	lseek (fd, offset, SEEK_SET);
393	res = read (fd, buf, count);
394	lseek (fd, ooffset, SEEK_SET);
395	pthread_mutex_unlock (&iolock);
396	UNLOCK_FD (d);
397
398	return res;
399	}
400
401	static ssize_t
402	pwrite (int fd, void *buf, size_t count, off_t offset)
403	{
404	ssize_t res;
405	off_t ooffset;
406
407	LOCK_FD (fd);
408	pthread_mutex_lock (&iolock); /* replace by LOCK_FD and private buffer */
409	ooffset = lseek (fd, 0, SEEK_CUR);
410	lseek (fd, offset, SEEK_SET);
411	res = write (fd, buf, count);
412	lseek (fd, offset, SEEK_SET);
413	pthread_mutex_unlock (&iolock);
414	UNLOCK_FD (d);
415
416	return res;
417	}
418	#endif
419
420	#if !HAVE_FDATASYNC
421	# define fdatasync fsync
422	#endif
423
424	#if !HAVE_READAHEAD
425	# define readahead aio_readahead
426
427	static char readahead_buf[4096];
428
429	static ssize_t
430	readahead (int fd, off_t offset, size_t count)
431	{
432	while (count > 0)
433	{
434	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
435
436	pread (fd, readahead_buf, len, offset);
437	offset += len;
438	count -= len;
439	}
440
441	errno = 0;
442	}
443	#endif
444
445	/* sendfile always needs emulation */
446	static ssize_t
447	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
448	{
449	ssize_t res;
450
451	if (!count)
452	return 0;
453
454	LOCK_FD (ofd);
455
456	#if HAVE_SENDFILE
457	# if __linux
458	res = sendfile (ofd, ifd, &offset, count);
459
460	# elif __freebsd
461	/*
462	* Of course, the freebsd sendfile is a dire hack with no thoughts
463	* wasted on making it similar to other I/O functions.
464	*/
465	{
466	off_t sbytes;
467	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
468
469	if (res < 0 && sbytes)
470	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
471	res = sbytes;
472	}
473
474	# elif __hpux
475	res = sendfile (ofd, ifd, offset, count, 0, 0);
476
477	# elif __solaris
478	{
479	struct sendfilevec vec;
480	size_t sbytes;
481
482	vec.sfv_fd = ifd;
483	vec.sfv_flag = 0;
484	vec.sfv_off = offset;
485	vec.sfv_len = count;
486
487	res = sendfilev (ofd, &vec, 1, &sbytes);
488
489	if (res < 0 && sbytes)
490	res = sbytes;
491	}
492
493	# else
494	res = -1;
495	errno = ENOSYS;
496	# endif
497	#endif
498
499	if (res < 0
500	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
501	#if __solaris
502	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
503	#endif
504	)
505	)
506	{
507	/* emulate sendfile. this is a major pain in the ass */
508	char *buf = malloc (4096);
509	res = 0;
510
511	for (;;)
512	{
513	ssize_t cnt;
514
515	cnt = pread (ifd, buf, 4096, offset);
516
517	if (cnt <= 0)
518	{
519	if (cnt && !res) res = -1;
520	break;
521	}
522
523	cnt = write (ofd, buf, cnt);
524
525	if (cnt <= 0)
526	{
527	if (cnt && !res) res = -1;
528	break;
529	}
530
531	offset += cnt;
532	res += cnt;
533	}
534
535	{
536	int errorno = errno;
537	free (buf);
538	errno = errorno;
539	}
540	}
541
542	UNLOCK_FD (ofd);
543
544	return res;
545	}
546
547	/*****************************************************************************/
548
549	static void *
550	aio_proc (void *thr_arg)
551	{
552	aio_req req;
553	int type;
554
555	do
556	{
557	pthread_mutex_lock (&reqlock);
558
559	for (;;)
560	{
561	req = reqs;
562
563	if (reqs)
564	{
565	reqs = reqs->next;
566	if (!reqs) reqe = 0;
567	}
568
569	if (req)
570	break;	243	break;
571		244
572	pthread_cond_wait (&reqwait, &reqlock);	245	case EIO_GROUP:
573	}	246	req->int1 = 2; /* mark group as finished */
574		247
575	pthread_mutex_unlock (&reqlock);	248	if (req->sv1)
576
577	errno = 0; /* strictly unnecessary */
578
579	type = req->type;
580
581	switch (type)
582	{	249	{
583	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	250	int i;
584	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	251	AV *av = (AV *)req->sv1;
585		252
586	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	253	EXTEND (SP, AvFILL (av) + 1);
587	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	254	for (i = 0; i <= AvFILL (av); ++i)
588		255	PUSHs (*av_fetch (av, i, 0));
589	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	256	}
590	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
591	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
592
593	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
594	case REQ_CLOSE: req->result = close (req->fd); break;
595	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
596	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
597	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
598
599	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
600	case REQ_FSYNC: req->result = fsync (req->fd); break;
601
602	case REQ_QUIT:
603	break;	257	break;
604		258
		259	case EIO_NOP:
		260	case EIO_BUSY:
		261	break;
		262
		263	case EIO_READLINK:
		264	if (req->result > 0)
		265	{
		266	SvCUR_set (req->sv2, req->result);
		267	*SvEND (req->sv2) = 0;
		268	PUSHs (req->sv2);
		269	}
		270	break;
		271
		272	case EIO_STAT:
		273	case EIO_LSTAT:
		274	case EIO_FSTAT:
		275	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		276	PL_laststatval = req->result;
		277	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		278	PUSHs (sv_2mortal (newSViv (req->result)));
		279	break;
		280
		281	case EIO_READ:
		282	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		283	*SvEND (req->sv2) = 0;
		284	PUSHs (sv_2mortal (newSViv (req->result)));
		285	break;
		286
		287	case EIO_DUP2:
		288	if (req->result > 0)
		289	req->result = 0;
		290	/* FALLTHROUGH */
		291
605	default:	292	default:
606	req->result = ENOSYS;	293	PUSHs (sv_2mortal (newSViv (req->result)));
607	break;	294	break;
608	}	295	}
609		296
610	req->errorno = errno;	297	errno = req->errorno;
611		298
612	pthread_mutex_lock (&reslock);	299	PUTBACK;
		300	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		301	SPAGAIN;
613		302
614	req->next = 0;	303	FREETMPS;
		304	LEAVE;
615		305
616	if (rese)	306	PUTBACK;
617	{
618	rese->next = req;
619	rese = req;
620	}
621	else
622	{
623	rese = ress = req;
624
625	/* write a dummy byte to the pipe so fh becomes ready */
626	write (respipe [1], &respipe, 1);
627	}
628
629	pthread_mutex_unlock (&reslock);
630	}	307	}
631	while (type != REQ_QUIT);
632		308
		309	return !!SvTRUE (ERRSV);
		310	}
		311
		312	static void req_destroy (aio_req req)
		313	{
		314	if (req->self)
		315	{
		316	sv_unmagic (req->self, PERL_MAGIC_ext);
		317	SvREFCNT_dec (req->self);
		318	}
		319
		320	SvREFCNT_dec (req->sv1);
		321	SvREFCNT_dec (req->sv2);
		322	SvREFCNT_dec (req->callback);
		323
		324	Safefree (req);
		325	}
		326
		327	static void req_cancel_subs (aio_req grp)
		328	{
		329	aio_req sub;
		330
		331	if (grp->type != EIO_GROUP)
		332	return;
		333
		334	SvREFCNT_dec (grp->sv2);
		335	grp->sv2 = 0;
		336
		337	eio_grp_cancel (grp);
		338	}
		339
		340	#ifdef USE_SOCKETS_AS_HANDLES
		341	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		342	#else
		343	# define TO_SOCKET(x) (x)
		344	#endif
		345
		346	static void
		347	create_respipe (void)
		348	{
		349	int old_readfd = respipe [0];
		350
		351	if (respipe [1] >= 0)
		352	respipe_close (TO_SOCKET (respipe [1]));
		353
		354	#ifdef _WIN32
		355	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		356	#else
		357	if (pipe (respipe))
		358	#endif
		359	croak ("unable to initialize result pipe");
		360
		361	if (old_readfd >= 0)
		362	{
		363	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		364	croak ("unable to initialize result pipe(2)");
		365
		366	respipe_close (respipe [0]);
		367	respipe [0] = old_readfd;
		368	}
		369
		370	#ifdef _WIN32
		371	int arg = 1;
		372	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		373	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		374	#else
		375	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		376	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		377	#endif
		378	croak ("unable to initialize result pipe(3)");
		379
		380	respipe_osf [0] = TO_SOCKET (respipe [0]);
		381	respipe_osf [1] = TO_SOCKET (respipe [1]);
		382	}
		383
		384	static void poll_wait (void)
		385	{
		386	fd_set rfd;
		387
		388	while (eio_nreqs ())
		389	{
		390	int size;
		391
		392	X_LOCK (reslock);
		393	size = res_queue.size;
		394	X_UNLOCK (reslock);
		395
		396	if (size)
		397	return;
		398
		399	maybe_start_thread ();
		400
		401	FD_ZERO (&rfd);
		402	FD_SET (respipe [0], &rfd);
		403
		404	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		405	}
		406	}
		407
		408	static int poll_cb (void)
		409	{
		410	int res;
		411
		412	do
		413	{
		414	res = eio_poll ();
		415
		416	if (res > 0)
		417	croak (0);
		418	}
		419	while (max_outstanding && max_outstanding <= eio_nreqs ());
		420
633	return 0;	421	return res;
		422	}
		423
		424	static void atfork_child (void)
		425	{
		426	create_respipe ();
634	}	427	}
635		428
636	#define dREQ \	429	#define dREQ \
637	aio_req req; \	430	aio_req req; \
		431	int req_pri = next_pri; \
		432	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
638	\	433	\
639	if (SvOK (callback) && !SvROK (callback)) \	434	if (SvOK (callback) && !SvROK (callback)) \
640	croak ("clalback must be undef or of reference type"); \	435	croak ("callback must be undef or of reference type"); \
641	\	436	\
642	Newz (0, req, 1, aio_cb); \	437	Newz (0, req, 1, eio_req); \
643	if (!req) \	438	if (!req) \
644	croak ("out of memory during aio_req allocation"); \	439	croak ("out of memory during eio_req allocation"); \
645	\	440	\
646	req->callback = newSVsv (callback);	441	req->callback = newSVsv (callback); \
		442	req->pri = req_pri
		443
		444	#define REQ_SEND \
		445	eio_submit (req); \
		446	\
		447	if (GIMME_V != G_VOID) \
		448	XPUSHs (req_sv (req, AIO_REQ_KLASS));
647		449
648	MODULE = IO::AIO PACKAGE = IO::AIO	450	MODULE = IO::AIO PACKAGE = IO::AIO
649		451
650	PROTOTYPES: ENABLE	452	PROTOTYPES: ENABLE
651		453
652	BOOT:	454	BOOT:
653	{	455	{
654	create_pipe ();	456	stash = gv_stashpv ("IO::AIO", 1);
655	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
656	}
657		457
		458	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		459	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		460	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		461	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		462	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		463	#ifdef _WIN32
		464	X_MUTEX_CHECK (wrklock);
		465	X_MUTEX_CHECK (reslock);
		466	X_MUTEX_CHECK (reqlock);
		467	X_MUTEX_CHECK (reqwait);
		468	X_MUTEX_CHECK (preadwritelock);
		469	X_MUTEX_CHECK (readdirlock);
		470
		471	X_COND_CHECK (reqwait);
		472	#else
		473	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		474	#endif
		475
		476	create_respipe ();
		477
		478	if (eio_init (want_poll, done_poll) < 0)
		479	croak ("IO::AIO: unable to initialise eio library");
		480
		481	/* atfork child called in fifo order, so before eio's handler */
		482	X_THREAD_ATFORK (0, 0, atfork_child);
		483	}
		484
658	void	485	void
659	min_parallel(nthreads)	486	max_poll_reqs (int nreqs)
660	int nthreads
661	PROTOTYPE: $	487	PROTOTYPE: $
		488	CODE:
		489	eio_set_max_poll_reqs (nreqs);
662		490
663	void	491	void
664	max_parallel(nthreads)	492	max_poll_time (double nseconds)
665	int nthreads
666	PROTOTYPE: $	493	PROTOTYPE: $
667
668	int
669	max_outstanding(nreqs)
670	int nreqs
671	PROTOTYPE: $
672	CODE:	494	CODE:
673	RETVAL = max_outstanding;	495	eio_set_max_poll_time (nseconds);
		496
		497	void
		498	min_parallel (int nthreads)
		499	PROTOTYPE: $
		500	CODE:
		501	eio_set_min_parallel (nthreads);
		502
		503	void
		504	max_parallel (int nthreads)
		505	PROTOTYPE: $
		506	CODE:
		507	eio_set_max_parallel (nthreads);
		508
		509	void
		510	max_idle (int nthreads)
		511	PROTOTYPE: $
		512	CODE:
		513	eio_set_max_idle (nthreads);
		514
		515	void
		516	max_outstanding (int maxreqs)
		517	PROTOTYPE: $
		518	CODE:
674	max_outstanding = nreqs;	519	max_outstanding = maxreqs;
675		520
676	void	521	void
677	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	522	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
678	SV * pathname
679	int flags
680	int mode
681	SV * callback
682	PROTOTYPE: $$$;$	523	PROTOTYPE: $$$;$
683	CODE:	524	PPCODE:
684	{	525	{
685	dREQ;	526	dREQ;
686		527
687	req->type = REQ_OPEN;	528	req->type = EIO_OPEN;
688	req->data = newSVsv (pathname);	529	req->sv1 = newSVsv (pathname);
689	req->dataptr = SvPVbyte_nolen (req->data);	530	req->ptr1 = SvPVbyte_nolen (req->sv1);
690	req->fd = flags;	531	req->int1 = flags;
691	req->mode = mode;	532	req->int2 = mode;
692		533
693	send_req (req);	534	REQ_SEND;
694	}	535	}
695		536
696	void	537	void
697	aio_close(fh,callback=&PL_sv_undef)	538	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
698	SV * fh
699	SV * callback
700	PROTOTYPE: $;$	539	PROTOTYPE: $;$
701	ALIAS:	540	ALIAS:
702	aio_close = REQ_CLOSE
703	aio_fsync = REQ_FSYNC	541	aio_fsync = EIO_FSYNC
704	aio_fdatasync = REQ_FDATASYNC	542	aio_fdatasync = EIO_FDATASYNC
705	CODE:	543	PPCODE:
706	{	544	{
707	dREQ;	545	dREQ;
708		546
709	req->type = ix;	547	req->type = ix;
710	req->fh = newSVsv (fh);	548	req->sv1 = newSVsv (fh);
711	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	549	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
712		550
713	send_req (req);	551	REQ_SEND (req);
714	}	552	}
715		553
716	void	554	void
		555	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		556	PROTOTYPE: $;$
		557	PPCODE:
		558	{
		559	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		560	dREQ;
		561
		562	if (close_pipe < 0)
		563	{
		564	int pipefd [2];
		565
		566	if (pipe (pipefd) < 0
		567	|| close (pipefd [1]) < 0
		568	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		569	abort (); /*D*/
		570
		571	close_pipe = pipefd [0];
		572	}
		573
		574	req->type = EIO_DUP2;
		575	req->int1 = close_pipe;
		576	req->sv2 = newSVsv (fh);
		577	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		578
		579	REQ_SEND (req);
		580	}
		581
		582	void
717	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	583	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
718	SV * fh
719	UV offset
720	UV length
721	SV * data
722	UV dataoffset
723	SV * callback
724	ALIAS:	584	ALIAS:
725	aio_read = REQ_READ	585	aio_read = EIO_READ
726	aio_write = REQ_WRITE	586	aio_write = EIO_WRITE
727	PROTOTYPE: $$$$$;$	587	PROTOTYPE: $$$$$;$
728	CODE:	588	PPCODE:
729	{	589	{
730	aio_req req;
731	STRLEN svlen;	590	STRLEN svlen;
732	char *svptr = SvPVbyte (data, svlen);	591	char *svptr = SvPVbyte (data, svlen);
		592	UV len = SvUV (length);
733		593
734	SvUPGRADE (data, SVt_PV);	594	SvUPGRADE (data, SVt_PV);
735	SvPOK_on (data);	595	SvPOK_on (data);
736		596
737	if (dataoffset < 0)	597	if (dataoffset < 0)
738	dataoffset += svlen;	598	dataoffset += svlen;
739		599
740	if (dataoffset < 0 || dataoffset > svlen)	600	if (dataoffset < 0 || dataoffset > svlen)
741	croak ("data offset outside of string");	601	croak ("dataoffset outside of data scalar");
742		602
743	if (ix == REQ_WRITE)	603	if (ix == EIO_WRITE)
744	{	604	{
745	/* write: check length and adjust. */	605	/* write: check length and adjust. */
746	if (length < 0 || length + dataoffset > svlen)	606	if (!SvOK (length) || len + dataoffset > svlen)
747	length = svlen - dataoffset;	607	len = svlen - dataoffset;
748	}	608	}
749	else	609	else
750	{	610	{
751	/* read: grow scalar as necessary */	611	/* read: grow scalar as necessary */
752	svptr = SvGROW (data, length + dataoffset);	612	svptr = SvGROW (data, len + dataoffset + 1);
753	}	613	}
754		614
755	if (length < 0)	615	if (len < 0)
756	croak ("length must not be negative");	616	croak ("length must not be negative");
757		617
758	{	618	{
759	dREQ;	619	dREQ;
760		620
761	req->type = ix;	621	req->type = ix;
762	req->fh = newSVsv (fh);	622	req->sv1 = newSVsv (fh);
763	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	623	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
764	: IoOFP (sv_2io (fh)));	624	: IoOFP (sv_2io (fh)));
		625	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
765	req->offset = offset;	626	req->size = len;
766	req->length = length;
767	req->data = SvREFCNT_inc (data);	627	req->sv2 = SvREFCNT_inc (data);
768	req->dataptr = (char *)svptr + dataoffset;	628	req->ptr2 = (char *)svptr + dataoffset;
		629	req->stroffset = dataoffset;
769		630
770	if (!SvREADONLY (data))	631	if (!SvREADONLY (data))
771	{	632	{
772	SvREADONLY_on (data);	633	SvREADONLY_on (data);
773	req->data2ptr = (void *)data;	634	req->flags |= FLAG_SV2_RO_OFF;
774	}	635	}
775		636
776	send_req (req);	637	REQ_SEND;
777	}	638	}
778	}	639	}
779		640
780	void	641	void
		642	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		643	PROTOTYPE: $$;$
		644	PPCODE:
		645	{
		646	SV *data;
		647	dREQ;
		648
		649	data = newSV (NAME_MAX);
		650	SvPOK_on (data);
		651
		652	req->type = EIO_READLINK;
		653	req->sv1 = newSVsv (path);
		654	req->ptr1 = SvPVbyte_nolen (req->sv1);
		655	req->sv2 = data;
		656	req->ptr2 = SvPVbyte_nolen (data);
		657
		658	REQ_SEND;
		659	}
		660
		661	void
781	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	662	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
782	SV * out_fh
783	SV * in_fh
784	UV in_offset
785	UV length
786	SV * callback
787	PROTOTYPE: $$$$;$	663	PROTOTYPE: $$$$;$
788	CODE:	664	PPCODE:
789	{	665	{
790	dREQ;	666	dREQ;
791		667
792	req->type = REQ_SENDFILE;	668	req->type = EIO_SENDFILE;
793	req->fh = newSVsv (out_fh);	669	req->sv1 = newSVsv (out_fh);
794	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	670	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
795	req->fh2 = newSVsv (in_fh);	671	req->sv2 = newSVsv (in_fh);
796	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	672	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
797	req->offset = in_offset;	673	req->offs = SvVAL64 (in_offset);
798	req->length = length;	674	req->size = length;
799		675
800	send_req (req);	676	REQ_SEND;
801	}	677	}
802		678
803	void	679	void
804	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	680	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
805	SV * fh
806	UV offset
807	IV length
808	SV * callback
809	PROTOTYPE: $$$;$	681	PROTOTYPE: $$$;$
810	CODE:	682	PPCODE:
811	{	683	{
812	dREQ;	684	dREQ;
813		685
814	req->type = REQ_READAHEAD;	686	req->type = EIO_READAHEAD;
815	req->fh = newSVsv (fh);	687	req->sv1 = newSVsv (fh);
816	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	688	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
817	req->offset = offset;	689	req->offs = SvVAL64 (offset);
818	req->length = length;	690	req->size = length;
819		691
820	send_req (req);	692	REQ_SEND;
821	}	693	}
822		694
823	void	695	void
824	aio_stat(fh_or_path,callback=&PL_sv_undef)	696	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
825	SV * fh_or_path
826	SV * callback
827	ALIAS:	697	ALIAS:
828	aio_stat = REQ_STAT	698	aio_stat = EIO_STAT
829	aio_lstat = REQ_LSTAT	699	aio_lstat = EIO_LSTAT
830	CODE:	700	PPCODE:
831	{	701	{
832	dREQ;	702	dREQ;
833		703
834	New (0, req->statdata, 1, Stat_t);	704	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
835	if (!req->statdata)	705	if (!req->ptr2)
836	{	706	{
837	free_req (req);	707	req_destroy (req);
838	croak ("out of memory during aio_req->statdata allocation");	708	croak ("out of memory during aio_stat statdata allocation");
839	}	709	}
		710
		711	req->flags |= EIO_FLAG_PTR2_FREE;
		712	req->sv1 = newSVsv (fh_or_path);
840		713
841	if (SvPOK (fh_or_path))	714	if (SvPOK (fh_or_path))
842	{	715	{
843	req->type = ix;	716	req->type = ix;
844	req->data = newSVsv (fh_or_path);
845	req->dataptr = SvPVbyte_nolen (req->data);	717	req->ptr1 = SvPVbyte_nolen (req->sv1);
846	}	718	}
847	else	719	else
848	{	720	{
849	req->type = REQ_FSTAT;	721	req->type = EIO_FSTAT;
850	req->fh = newSVsv (fh_or_path);
851	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	722	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		723	}
		724
		725	REQ_SEND;
		726	}
		727
		728	void
		729	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		730	PPCODE:
		731	{
		732	dREQ;
		733
		734	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		735	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		736	req->sv1 = newSVsv (fh_or_path);
		737
		738	if (SvPOK (fh_or_path))
852	}	739	{
		740	req->type = EIO_UTIME;
		741	req->ptr1 = SvPVbyte_nolen (req->sv1);
		742	}
		743	else
		744	{
		745	req->type = EIO_FUTIME;
		746	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		747	}
853		748
854	send_req (req);	749	REQ_SEND;
855	}	750	}
856		751
857	void	752	void
		753	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		754	PPCODE:
		755	{
		756	dREQ;
		757
		758	req->sv1 = newSVsv (fh_or_path);
		759	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		760
		761	if (SvPOK (fh_or_path))
		762	{
		763	req->type = EIO_TRUNCATE;
		764	req->ptr1 = SvPVbyte_nolen (req->sv1);
		765	}
		766	else
		767	{
		768	req->type = EIO_FTRUNCATE;
		769	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		770	}
		771
		772	REQ_SEND;
		773	}
		774
		775	void
		776	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		777	ALIAS:
		778	aio_chmod = EIO_CHMOD
		779	aio_fchmod = EIO_FCHMOD
		780	aio_mkdir = EIO_MKDIR
		781	PPCODE:
		782	{
		783	dREQ;
		784
		785	req->type = ix;
		786	req->int2 = mode;
		787	req->sv1 = newSVsv (fh_or_path);
		788
		789	if (ix == EIO_FCHMOD)
		790	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		791	else
		792	req->ptr1 = SvPVbyte_nolen (req->sv1);
		793
		794	REQ_SEND;
		795	}
		796
		797	void
		798	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		799	PPCODE:
		800	{
		801	dREQ;
		802
		803	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		804	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		805	req->sv1 = newSVsv (fh_or_path);
		806
		807	if (SvPOK (fh_or_path))
		808	{
		809	req->type = EIO_CHOWN;
		810	req->ptr1 = SvPVbyte_nolen (req->sv1);
		811	}
		812	else
		813	{
		814	req->type = EIO_FCHOWN;
		815	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		816	}
		817
		818	REQ_SEND;
		819	}
		820
		821	void
858	aio_unlink(pathname,callback=&PL_sv_undef)	822	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
859	SV * pathname
860	SV * callback
861	ALIAS:	823	ALIAS:
862	aio_unlink = REQ_UNLINK	824	aio_unlink = EIO_UNLINK
863	aio_rmdir = REQ_RMDIR	825	aio_rmdir = EIO_RMDIR
		826	aio_readdir = EIO_READDIR
864	CODE:	827	PPCODE:
865	{	828	{
866	dREQ;	829	dREQ;
867		830
868	req->type = ix;	831	req->type = ix;
869	req->data = newSVsv (pathname);	832	req->sv1 = newSVsv (pathname);
870	req->dataptr = SvPVbyte_nolen (req->data);	833	req->ptr1 = SvPVbyte_nolen (req->sv1);
		834
		835	REQ_SEND;
		836	}
		837
		838	void
		839	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		840	ALIAS:
		841	aio_link = EIO_LINK
		842	aio_symlink = EIO_SYMLINK
		843	aio_rename = EIO_RENAME
		844	PPCODE:
		845	{
		846	dREQ;
871		847
872	send_req (req);	848	req->type = ix;
873	}	849	req->sv1 = newSVsv (oldpath);
874		850	req->ptr1 = SvPVbyte_nolen (req->sv1);
875	void	851	req->sv2 = newSVsv (newpath);
876	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	852	req->ptr2 = SvPVbyte_nolen (req->sv2);
877	SV * oldpath
878	SV * newpath
879	SV * callback
880	CODE:
881	{
882	dREQ;
883		853
884	req->type = REQ_SYMLINK;	854	REQ_SEND;
885	req->fh = newSVsv (oldpath);	855	}
886	req->data2ptr = SvPVbyte_nolen (req->fh);	856
887	req->data = newSVsv (newpath);	857	void
888	req->dataptr = SvPVbyte_nolen (req->data);	858	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		859	PPCODE:
		860	{
		861	dREQ;
889		862
890	send_req (req);	863	req->type = EIO_MKNOD;
		864	req->sv1 = newSVsv (pathname);
		865	req->ptr1 = SvPVbyte_nolen (req->sv1);
		866	req->int2 = (mode_t)mode;
		867	req->offs = dev;
		868
		869	REQ_SEND;
891	}	870	}
892		871
893	void	872	void
		873	aio_busy (double delay, SV *callback=&PL_sv_undef)
		874	PPCODE:
		875	{
		876	dREQ;
		877
		878	req->type = EIO_BUSY;
		879	req->nv1 = delay < 0. ? 0. : delay;
		880
		881	REQ_SEND;
		882	}
		883
		884	void
		885	aio_group (SV *callback=&PL_sv_undef)
		886	PROTOTYPE: ;$
		887	PPCODE:
		888	{
		889	dREQ;
		890
		891	req->type = EIO_GROUP;
		892
		893	eio_submit (req);
		894	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		895	}
		896
		897	void
		898	aio_nop (SV *callback=&PL_sv_undef)
		899	ALIAS:
		900	aio_nop = EIO_NOP
		901	aio_sync = EIO_SYNC
		902	PPCODE:
		903	{
		904	dREQ;
		905
		906	req->type = ix;
		907
		908	REQ_SEND;
		909	}
		910
		911	int
		912	aioreq_pri (int pri = 0)
		913	PROTOTYPE: ;$
		914	CODE:
		915	RETVAL = next_pri - EIO_PRI_BIAS;
		916	if (items > 0)
		917	{
		918	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		919	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		920	next_pri = pri + EIO_PRI_BIAS;
		921	}
		922	OUTPUT:
		923	RETVAL
		924
		925	void
		926	aioreq_nice (int nice = 0)
		927	CODE:
		928	nice = next_pri - nice;
		929	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		930	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		931	next_pri = nice + EIO_PRI_BIAS;
		932
		933	void
894	flush()	934	flush ()
895	PROTOTYPE:	935	PROTOTYPE:
896	CODE:	936	CODE:
897	while (nreqs)	937	while (eio_nreqs ())
898	{	938	{
899	poll_wait ();	939	poll_wait ();
900	poll_cb ();	940	poll_cb ();
901	}	941	}
902		942
903	void	943	int
904	poll()	944	poll()
905	PROTOTYPE:	945	PROTOTYPE:
906	CODE:	946	CODE:
907	if (nreqs)
908	{
909	poll_wait ();	947	poll_wait ();
910	poll_cb ();	948	RETVAL = poll_cb ();
911	}	949	OUTPUT:
		950	RETVAL
912		951
913	int	952	int
914	poll_fileno()	953	poll_fileno()
915	PROTOTYPE:	954	PROTOTYPE:
916	CODE:	955	CODE:
…		…
928		967
929	void	968	void
930	poll_wait()	969	poll_wait()
931	PROTOTYPE:	970	PROTOTYPE:
932	CODE:	971	CODE:
933	if (nreqs)
934	poll_wait ();	972	poll_wait ();
935		973
936	int	974	int
937	nreqs()	975	nreqs()
938	PROTOTYPE:	976	PROTOTYPE:
939	CODE:	977	CODE:
940	RETVAL = nreqs;	978	RETVAL = eio_nreqs ();
941	OUTPUT:	979	OUTPUT:
942	RETVAL	980	RETVAL
943		981
		982	int
		983	nready()
		984	PROTOTYPE:
		985	CODE:
		986	RETVAL = eio_nready ();
		987	OUTPUT:
		988	RETVAL
		989
		990	int
		991	npending()
		992	PROTOTYPE:
		993	CODE:
		994	RETVAL = eio_npending ();
		995	OUTPUT:
		996	RETVAL
		997
		998	int
		999	nthreads()
		1000	PROTOTYPE:
		1001	CODE:
		1002	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		1003	RETVAL = started;
		1004	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		1005	OUTPUT:
		1006	RETVAL
		1007
		1008	PROTOTYPES: DISABLE
		1009
		1010	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1011
		1012	void
		1013	cancel (aio_req_ornot req)
		1014	CODE:
		1015	eio_cancel (req);
		1016
		1017	void
		1018	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1019	CODE:
		1020	SvREFCNT_dec (req->callback);
		1021	req->callback = newSVsv (callback);
		1022
		1023	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1024
		1025	void
		1026	add (aio_req grp, ...)
		1027	PPCODE:
		1028	{
		1029	int i;
		1030
		1031	if (grp->int1 == 2)
		1032	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1033
		1034	for (i = 1; i < items; ++i )
		1035	{
		1036	aio_req req;
		1037
		1038	if (GIMME_V != G_VOID)
		1039	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1040
		1041	req = SvAIO_REQ (ST (i));
		1042
		1043	if (req)
		1044	eio_grp_add (grp, req);
		1045	}
		1046	}
		1047
		1048	void
		1049	cancel_subs (aio_req_ornot req)
		1050	CODE:
		1051	req_cancel_subs (req);
		1052
		1053	void
		1054	result (aio_req grp, ...)
		1055	CODE:
		1056	{
		1057	int i;
		1058	AV *av;
		1059
		1060	grp->errorno = errno;
		1061
		1062	av = newAV ();
		1063
		1064	for (i = 1; i < items; ++i )
		1065	av_push (av, newSVsv (ST (i)));
		1066
		1067	SvREFCNT_dec (grp->sv1);
		1068	grp->sv1 = (SV *)av;
		1069	}
		1070
		1071	void
		1072	errno (aio_req grp, int errorno = errno)
		1073	CODE:
		1074	grp->errorno = errorno;
		1075
		1076	void
		1077	limit (aio_req grp, int limit)
		1078	CODE:
		1079	eio_grp_limit (grp, limit);
		1080
		1081	void
		1082	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1083	CODE:
		1084	{
		1085	SvREFCNT_dec (grp->sv2);
		1086	grp->sv2 = newSVsv (callback);
		1087
		1088	if (grp->int2 <= 0)
		1089	grp->int2 = 2;
		1090
		1091	eio_grp_limit (grp, grp->int2);
		1092	}
		1093

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