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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 1.118 by root, Sun May 11 00:01:03 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	/* perl namespace pollution */
21	# if __linux	19	#undef VERSION
22	# include <sys/sendfile.h>	20
23	# elif __freebsd	21	#ifdef _WIN32
24	# include <sys/socket.h>	22
25	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
26	# elif __hpux	24	# undef malloc
27	# include <sys/socket.h>	25	# undef free
28	# elif __solaris /* not yet */	26
29	# include <sys/sendfile.h>	27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
30	# else	59	#else
31	# error sendfile support requested but not available	60
32	# endif	61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
33	#endif	68	#endif
34		69
35	#if __ia64	70	#define EIO_STRUCT_STAT Stat_t
36	# define STACKSIZE 65536	71
		72	/* use NV for 32 bit perls as it allows larger offsets */
		73	#if IVSIZE >= 8
		74	# define SvVAL64 SvIV
37	#else	75	#else
38	# define STACKSIZE 4096	76	# define SvVAL64 SvNV
39	#endif	77	#endif
40		78
		79	static HV *stash;
		80	typedef SV SV8; /* byte-sv, used for argument-checking */
		81
		82	#define AIO_REQ_KLASS "IO::AIO::REQ"
		83	#define AIO_GRP_KLASS "IO::AIO::GRP"
		84
		85	#define EIO_COMMON \
		86	SV *callback; \
		87	SV *sv1, *sv2; \
		88	STRLEN stroffset; \
		89	SV *self
		90
		91	#include "libeio/eio.h"
		92
		93	static int req_invoke (eio_req *req);
		94	#define EIO_FINISH(req) req_invoke (req)
		95	static void aio_grp_feed (eio_req *grp);
		96	#define EIO_FEED(req) aio_grp_feed (req)
		97	static void req_destroy (eio_req *grp);
		98	#define EIO_DESTROY(req) req_destroy (req)
		99
41	enum {	100	enum {
42	REQ_QUIT,	101	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	};	102	};
51		103
52	typedef struct aio_cb {	104	#include "libeio/eio.c"
53	struct aio_cb *volatile next;
54		105
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;	106	typedef eio_req *aio_req;
		107	typedef eio_req *aio_req_ornot;
72		108
73	static int started, wanted;	109	static SV *on_next_submit;
74	static volatile int nreqs;	110	static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
75	static int max_outstanding = 1<<30;	111	static int max_outstanding;
76	static int respipe [2];
77		112
78	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	113	static int respipe_osf [2], respipe [2] = { -1, -1 };
79	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
80	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
81		114
82	static volatile aio_req reqs, reqe; /* queue start, queue end */	115	static void req_destroy (aio_req req);
83	static volatile aio_req ress, rese; /* queue start, queue end */
84
85	static void free_req (aio_req req)	116	static void req_cancel (aio_req req);
86	{
87	if (req->data)
88	SvREFCNT_dec (req->data);
89		117
		118	static void want_poll (void)
		119	{
		120	/* write a dummy byte to the pipe so fh becomes ready */
		121	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		122	}
		123
		124	static void done_poll (void)
		125	{
		126	/* read any signals sent by the worker threads */
		127	char buf [4];
		128	while (respipe_read (respipe [0], buf, 4) == 4)
		129	;
		130	}
		131
		132	/* must be called at most once */
		133	static SV *req_sv (aio_req req, const char *klass)
		134	{
90	if (req->fh)	135	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	{	136	{
110	fd_set rfd;	137	req->self = (SV *)newHV ();
111	FD_ZERO(&rfd);	138	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	}	139	}
116	}
117		140
118	static int	141	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
119	poll_cb ()	142	}
		143
		144	static aio_req SvAIO_REQ (SV *sv)
		145	{
		146	MAGIC *mg;
		147
		148	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		149	croak ("object of class " AIO_REQ_KLASS " expected");
		150
		151	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		152
		153	return mg ? (aio_req)mg->mg_ptr : 0;
		154	}
		155
		156	static void aio_grp_feed (aio_req grp)
		157	{
		158	if (grp->sv2 && SvOK (grp->sv2))
		159	{
		160	dSP;
		161
		162	ENTER;
		163	SAVETMPS;
		164	PUSHMARK (SP);
		165	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		166	PUTBACK;
		167	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		168	SPAGAIN;
		169	FREETMPS;
		170	LEAVE;
		171	}
		172	}
		173
		174	static void req_submit (eio_req *req)
		175	{
		176	eio_submit (req);
		177
		178	if (on_next_submit)
		179	{
		180	dSP;
		181	SV *cb = sv_2mortal (on_next_submit);
		182
		183	on_next_submit = 0;
		184
		185	PUSHMARK (SP);
		186	PUTBACK;
		187	call_sv (cb, G_DISCARD | G_EVAL);
		188	}
		189	}
		190
		191	static int req_invoke (eio_req *req)
120	{	192	{
121	dSP;	193	dSP;
122	int count = 0;
123	int do_croak = 0;
124	aio_req req;
125		194
126	for (;;)	195	if (req->flags & FLAG_SV2_RO_OFF)
		196	SvREADONLY_off (req->sv2);
		197
		198	if (!EIO_CANCELLED (req) && SvOK (req->callback))
127	{	199	{
128	pthread_mutex_lock (&reslock);	200	ENTER;
129	req = ress;	201	SAVETMPS;
		202	PUSHMARK (SP);
		203	EXTEND (SP, 1);
130		204
131	if (req)	205	switch (req->type)
132	{	206	{
133	ress = req->next;	207	case EIO_READDIR:
134
135	if (!ress)
136	{	208	{
137	/* read any signals sent by the worker threads */	209	SV *rv = &PL_sv_undef;
138	char buf [32];	210
139	while (read (respipe [0], buf, 32) == 32)	211	if (req->result >= 0)
140	;	212	{
		213	int i;
		214	char *buf = req->ptr2;
		215	AV *av = newAV ();
141		216
142	rese = 0;	217	av_extend (av, req->result - 1);
		218
		219	for (i = 0; i < req->result; ++i)
		220	{
		221	SV *sv = newSVpv (buf, 0);
		222
		223	av_store (av, i, sv);
		224	buf += SvCUR (sv) + 1;
		225	}
		226
		227	rv = sv_2mortal (newRV_noinc ((SV *)av));
		228	}
		229
		230	PUSHs (rv);
143	}	231	}
144	}
145
146	pthread_mutex_unlock (&reslock);
147
148	if (!req)
149	break;	232	break;
150		233
151	nreqs--;	234	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	{	235	{
179	/* convert fd to fh */	236	/* convert fd to fh */
180	SV *fh;	237	SV *fh = &PL_sv_undef;
181		238
182	PUTBACK;	239	if (req->result >= 0)
183	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	240	{
184	SPAGAIN;	241	GV *gv = (GV *)sv_newmortal ();
		242	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		243	char sym [64];
		244	int symlen;
		245
		246	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		247	gv_init (gv, stash, sym, symlen, 0);
185		248
186	fh = SvREFCNT_inc (POPs);	249	symlen = snprintf (
		250	sym,
		251	sizeof (sym),
		252	"%s&=%d",
		253	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		254	req->result
		255	);
187		256
		257	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		258	fh = (SV *)gv;
		259	}
		260
188	PUSHMARK (SP);	261	PUSHs (fh);
189	XPUSHs (sv_2mortal (fh));
190	}	262	}
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;	263	break;
571		264
572	pthread_cond_wait (&reqwait, &reqlock);	265	case EIO_GROUP:
573	}	266	req->int1 = 2; /* mark group as finished */
574		267
575	pthread_mutex_unlock (&reqlock);	268	if (req->sv1)
576
577	errno = 0; /* strictly unnecessary */
578
579	type = req->type;
580
581	switch (type)
582	{	269	{
583	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	270	int i;
584	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	271	AV *av = (AV *)req->sv1;
585		272
586	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	273	EXTEND (SP, AvFILL (av) + 1);
587	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	274	for (i = 0; i <= AvFILL (av); ++i)
588		275	PUSHs (*av_fetch (av, i, 0));
589	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	276	}
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;	277	break;
604		278
		279	case EIO_NOP:
		280	case EIO_BUSY:
		281	break;
		282
		283	case EIO_READLINK:
		284	if (req->result > 0)
		285	{
		286	SvCUR_set (req->sv2, req->result);
		287	*SvEND (req->sv2) = 0;
		288	PUSHs (req->sv2);
		289	}
		290	break;
		291
		292	case EIO_STAT:
		293	case EIO_LSTAT:
		294	case EIO_FSTAT:
		295	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		296	PL_laststatval = req->result;
		297	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		298	PUSHs (sv_2mortal (newSViv (req->result)));
		299	break;
		300
		301	case EIO_READ:
		302	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		303	*SvEND (req->sv2) = 0;
		304	PUSHs (sv_2mortal (newSViv (req->result)));
		305	break;
		306
		307	case EIO_DUP2:
		308	if (req->result > 0)
		309	req->result = 0;
		310	/* FALLTHROUGH */
		311
605	default:	312	default:
606	req->result = ENOSYS;	313	PUSHs (sv_2mortal (newSViv (req->result)));
607	break;	314	break;
608	}	315	}
609		316
610	req->errorno = errno;	317	errno = req->errorno;
611		318
612	pthread_mutex_lock (&reslock);	319	PUTBACK;
		320	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		321	SPAGAIN;
613		322
614	req->next = 0;	323	FREETMPS;
		324	LEAVE;
615		325
616	if (rese)	326	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	}	327	}
631	while (type != REQ_QUIT);
632		328
		329	return !!SvTRUE (ERRSV);
		330	}
		331
		332	static void req_destroy (aio_req req)
		333	{
		334	if (req->self)
		335	{
		336	sv_unmagic (req->self, PERL_MAGIC_ext);
		337	SvREFCNT_dec (req->self);
		338	}
		339
		340	SvREFCNT_dec (req->sv1);
		341	SvREFCNT_dec (req->sv2);
		342	SvREFCNT_dec (req->callback);
		343
		344	Safefree (req);
		345	}
		346
		347	static void req_cancel_subs (aio_req grp)
		348	{
		349	aio_req sub;
		350
		351	if (grp->type != EIO_GROUP)
		352	return;
		353
		354	SvREFCNT_dec (grp->sv2);
		355	grp->sv2 = 0;
		356
		357	eio_grp_cancel (grp);
		358	}
		359
		360	#ifdef USE_SOCKETS_AS_HANDLES
		361	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		362	#else
		363	# define TO_SOCKET(x) (x)
		364	#endif
		365
		366	static void
		367	create_respipe (void)
		368	{
		369	int old_readfd = respipe [0];
		370
		371	if (respipe [1] >= 0)
		372	respipe_close (TO_SOCKET (respipe [1]));
		373
		374	#ifdef _WIN32
		375	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		376	#else
		377	if (pipe (respipe))
		378	#endif
		379	croak ("unable to initialize result pipe");
		380
		381	if (old_readfd >= 0)
		382	{
		383	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		384	croak ("unable to initialize result pipe(2)");
		385
		386	respipe_close (respipe [0]);
		387	respipe [0] = old_readfd;
		388	}
		389
		390	#ifdef _WIN32
		391	int arg = 1;
		392	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		393	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		394	#else
		395	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		396	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		397	#endif
		398	croak ("unable to initialize result pipe(3)");
		399
		400	respipe_osf [0] = TO_SOCKET (respipe [0]);
		401	respipe_osf [1] = TO_SOCKET (respipe [1]);
		402	}
		403
		404	static void poll_wait (void)
		405	{
		406	fd_set rfd;
		407
		408	while (eio_nreqs ())
		409	{
		410	int size;
		411
		412	X_LOCK (reslock);
		413	size = res_queue.size;
		414	X_UNLOCK (reslock);
		415
		416	if (size)
		417	return;
		418
		419	maybe_start_thread ();
		420
		421	FD_ZERO (&rfd);
		422	FD_SET (respipe [0], &rfd);
		423
		424	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		425	}
		426	}
		427
		428	static int poll_cb (void)
		429	{
		430	int res;
		431
		432	do
		433	{
		434	res = eio_poll ();
		435
		436	if (res > 0)
		437	croak (0);
		438	}
		439	while (max_outstanding && max_outstanding <= eio_nreqs ());
		440
633	return 0;	441	return res;
		442	}
		443
		444	static void atfork_child (void)
		445	{
		446	create_respipe ();
634	}	447	}
635		448
636	#define dREQ \	449	#define dREQ \
637	aio_req req; \	450	aio_req req; \
		451	int req_pri = next_pri; \
		452	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
638	\	453	\
639	if (SvOK (callback) && !SvROK (callback)) \	454	if (SvOK (callback) && !SvROK (callback)) \
640	croak ("clalback must be undef or of reference type"); \	455	croak ("callback must be undef or of reference type"); \
641	\	456	\
642	Newz (0, req, 1, aio_cb); \	457	Newz (0, req, 1, eio_req); \
643	if (!req) \	458	if (!req) \
644	croak ("out of memory during aio_req allocation"); \	459	croak ("out of memory during eio_req allocation"); \
645	\	460	\
646	req->callback = newSVsv (callback);	461	req->callback = newSVsv (callback); \
		462	req->pri = req_pri
		463
		464	#define REQ_SEND \
		465	req_submit (req); \
		466	\
		467	if (GIMME_V != G_VOID) \
		468	XPUSHs (req_sv (req, AIO_REQ_KLASS));
647		469
648	MODULE = IO::AIO PACKAGE = IO::AIO	470	MODULE = IO::AIO PACKAGE = IO::AIO
649		471
650	PROTOTYPES: ENABLE	472	PROTOTYPES: ENABLE
651		473
652	BOOT:	474	BOOT:
653	{	475	{
654	create_pipe ();	476	stash = gv_stashpv ("IO::AIO", 1);
655	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
656	}
657		477
		478	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		479	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		480	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		481	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		482	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		483	#ifdef _WIN32
		484	X_MUTEX_CHECK (wrklock);
		485	X_MUTEX_CHECK (reslock);
		486	X_MUTEX_CHECK (reqlock);
		487	X_MUTEX_CHECK (reqwait);
		488	X_MUTEX_CHECK (preadwritelock);
		489	X_MUTEX_CHECK (readdirlock);
		490
		491	X_COND_CHECK (reqwait);
		492	#else
		493	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		494	#endif
		495
		496	create_respipe ();
		497
		498	if (eio_init (want_poll, done_poll) < 0)
		499	croak ("IO::AIO: unable to initialise eio library");
		500
		501	/* atfork child called in fifo order, so before eio's handler */
		502	X_THREAD_ATFORK (0, 0, atfork_child);
		503	}
		504
658	void	505	void
659	min_parallel(nthreads)	506	max_poll_reqs (int nreqs)
660	int nthreads
661	PROTOTYPE: $	507	PROTOTYPE: $
		508	CODE:
		509	eio_set_max_poll_reqs (nreqs);
662		510
663	void	511	void
664	max_parallel(nthreads)	512	max_poll_time (double nseconds)
665	int nthreads
666	PROTOTYPE: $	513	PROTOTYPE: $
667
668	int
669	max_outstanding(nreqs)
670	int nreqs
671	PROTOTYPE: $
672	CODE:	514	CODE:
673	RETVAL = max_outstanding;	515	eio_set_max_poll_time (nseconds);
		516
		517	void
		518	min_parallel (int nthreads)
		519	PROTOTYPE: $
		520	CODE:
		521	eio_set_min_parallel (nthreads);
		522
		523	void
		524	max_parallel (int nthreads)
		525	PROTOTYPE: $
		526	CODE:
		527	eio_set_max_parallel (nthreads);
		528
		529	void
		530	max_idle (int nthreads)
		531	PROTOTYPE: $
		532	CODE:
		533	eio_set_max_idle (nthreads);
		534
		535	void
		536	max_outstanding (int maxreqs)
		537	PROTOTYPE: $
		538	CODE:
674	max_outstanding = nreqs;	539	max_outstanding = maxreqs;
675		540
676	void	541	void
677	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	542	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: $$$;$	543	PROTOTYPE: $$$;$
683	CODE:	544	PPCODE:
684	{	545	{
685	dREQ;	546	dREQ;
686		547
687	req->type = REQ_OPEN;	548	req->type = EIO_OPEN;
688	req->data = newSVsv (pathname);	549	req->sv1 = newSVsv (pathname);
689	req->dataptr = SvPVbyte_nolen (req->data);	550	req->ptr1 = SvPVbyte_nolen (req->sv1);
690	req->fd = flags;	551	req->int1 = flags;
691	req->mode = mode;	552	req->int2 = mode;
692		553
693	send_req (req);	554	REQ_SEND;
694	}	555	}
695		556
696	void	557	void
697	aio_close(fh,callback=&PL_sv_undef)	558	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
698	SV * fh
699	SV * callback
700	PROTOTYPE: $;$	559	PROTOTYPE: $;$
701	ALIAS:	560	ALIAS:
702	aio_close = REQ_CLOSE
703	aio_fsync = REQ_FSYNC	561	aio_fsync = EIO_FSYNC
704	aio_fdatasync = REQ_FDATASYNC	562	aio_fdatasync = EIO_FDATASYNC
705	CODE:	563	PPCODE:
706	{	564	{
707	dREQ;	565	dREQ;
708		566
709	req->type = ix;	567	req->type = ix;
710	req->fh = newSVsv (fh);	568	req->sv1 = newSVsv (fh);
711	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	569	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
712		570
713	send_req (req);	571	REQ_SEND (req);
714	}	572	}
715		573
716	void	574	void
		575	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		576	PROTOTYPE: $;$
		577	PPCODE:
		578	{
		579	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		580	dREQ;
		581
		582	if (close_pipe < 0)
		583	{
		584	int pipefd [2];
		585
		586	if (pipe (pipefd) < 0
		587	|| close (pipefd [1]) < 0
		588	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		589	abort (); /*D*/
		590
		591	close_pipe = pipefd [0];
		592	}
		593
		594	req->type = EIO_DUP2;
		595	req->int1 = close_pipe;
		596	req->sv2 = newSVsv (fh);
		597	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		598
		599	REQ_SEND (req);
		600	}
		601
		602	void
717	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	603	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:	604	ALIAS:
725	aio_read = REQ_READ	605	aio_read = EIO_READ
726	aio_write = REQ_WRITE	606	aio_write = EIO_WRITE
727	PROTOTYPE: $$$$$;$	607	PROTOTYPE: $$$$$;$
728	CODE:	608	PPCODE:
729	{	609	{
730	aio_req req;
731	STRLEN svlen;	610	STRLEN svlen;
732	char *svptr = SvPVbyte (data, svlen);	611	char *svptr = SvPVbyte (data, svlen);
		612	UV len = SvUV (length);
733		613
734	SvUPGRADE (data, SVt_PV);	614	SvUPGRADE (data, SVt_PV);
735	SvPOK_on (data);	615	SvPOK_on (data);
736		616
737	if (dataoffset < 0)	617	if (dataoffset < 0)
738	dataoffset += svlen;	618	dataoffset += svlen;
739		619
740	if (dataoffset < 0 || dataoffset > svlen)	620	if (dataoffset < 0 || dataoffset > svlen)
741	croak ("data offset outside of string");	621	croak ("dataoffset outside of data scalar");
742		622
743	if (ix == REQ_WRITE)	623	if (ix == EIO_WRITE)
744	{	624	{
745	/* write: check length and adjust. */	625	/* write: check length and adjust. */
746	if (length < 0 || length + dataoffset > svlen)	626	if (!SvOK (length) || len + dataoffset > svlen)
747	length = svlen - dataoffset;	627	len = svlen - dataoffset;
748	}	628	}
749	else	629	else
750	{	630	{
751	/* read: grow scalar as necessary */	631	/* read: grow scalar as necessary */
752	svptr = SvGROW (data, length + dataoffset);	632	svptr = SvGROW (data, len + dataoffset + 1);
753	}	633	}
754		634
755	if (length < 0)	635	if (len < 0)
756	croak ("length must not be negative");	636	croak ("length must not be negative");
757		637
758	{	638	{
759	dREQ;	639	dREQ;
760		640
761	req->type = ix;	641	req->type = ix;
762	req->fh = newSVsv (fh);	642	req->sv1 = newSVsv (fh);
763	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	643	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
764	: IoOFP (sv_2io (fh)));	644	: IoOFP (sv_2io (fh)));
		645	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
765	req->offset = offset;	646	req->size = len;
766	req->length = length;
767	req->data = SvREFCNT_inc (data);	647	req->sv2 = SvREFCNT_inc (data);
768	req->dataptr = (char *)svptr + dataoffset;	648	req->ptr2 = (char *)svptr + dataoffset;
		649	req->stroffset = dataoffset;
769		650
770	if (!SvREADONLY (data))	651	if (!SvREADONLY (data))
771	{	652	{
772	SvREADONLY_on (data);	653	SvREADONLY_on (data);
773	req->data2ptr = (void *)data;	654	req->flags |= FLAG_SV2_RO_OFF;
774	}	655	}
775		656
776	send_req (req);	657	REQ_SEND;
777	}	658	}
778	}	659	}
779		660
780	void	661	void
		662	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		663	PROTOTYPE: $$;$
		664	PPCODE:
		665	{
		666	SV *data;
		667	dREQ;
		668
		669	data = newSV (NAME_MAX);
		670	SvPOK_on (data);
		671
		672	req->type = EIO_READLINK;
		673	req->sv1 = newSVsv (path);
		674	req->ptr1 = SvPVbyte_nolen (req->sv1);
		675	req->sv2 = data;
		676	req->ptr2 = SvPVbyte_nolen (data);
		677
		678	REQ_SEND;
		679	}
		680
		681	void
781	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	682	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: $$$$;$	683	PROTOTYPE: $$$$;$
788	CODE:	684	PPCODE:
789	{	685	{
790	dREQ;	686	dREQ;
791		687
792	req->type = REQ_SENDFILE;	688	req->type = EIO_SENDFILE;
793	req->fh = newSVsv (out_fh);	689	req->sv1 = newSVsv (out_fh);
794	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	690	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
795	req->fh2 = newSVsv (in_fh);	691	req->sv2 = newSVsv (in_fh);
796	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	692	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
797	req->offset = in_offset;	693	req->offs = SvVAL64 (in_offset);
798	req->length = length;	694	req->size = length;
799		695
800	send_req (req);	696	REQ_SEND;
801	}	697	}
802		698
803	void	699	void
804	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	700	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
805	SV * fh
806	UV offset
807	IV length
808	SV * callback
809	PROTOTYPE: $$$;$	701	PROTOTYPE: $$$;$
810	CODE:	702	PPCODE:
811	{	703	{
812	dREQ;	704	dREQ;
813		705
814	req->type = REQ_READAHEAD;	706	req->type = EIO_READAHEAD;
815	req->fh = newSVsv (fh);	707	req->sv1 = newSVsv (fh);
816	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	708	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
817	req->offset = offset;	709	req->offs = SvVAL64 (offset);
818	req->length = length;	710	req->size = length;
819		711
820	send_req (req);	712	REQ_SEND;
821	}	713	}
822		714
823	void	715	void
824	aio_stat(fh_or_path,callback=&PL_sv_undef)	716	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
825	SV * fh_or_path
826	SV * callback
827	ALIAS:	717	ALIAS:
828	aio_stat = REQ_STAT	718	aio_stat = EIO_STAT
829	aio_lstat = REQ_LSTAT	719	aio_lstat = EIO_LSTAT
830	CODE:	720	PPCODE:
831	{	721	{
832	dREQ;	722	dREQ;
833		723
834	New (0, req->statdata, 1, Stat_t);	724	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
835	if (!req->statdata)	725	if (!req->ptr2)
836	{	726	{
837	free_req (req);	727	req_destroy (req);
838	croak ("out of memory during aio_req->statdata allocation");	728	croak ("out of memory during aio_stat statdata allocation");
839	}	729	}
		730
		731	req->flags |= EIO_FLAG_PTR2_FREE;
		732	req->sv1 = newSVsv (fh_or_path);
840		733
841	if (SvPOK (fh_or_path))	734	if (SvPOK (fh_or_path))
842	{	735	{
843	req->type = ix;	736	req->type = ix;
844	req->data = newSVsv (fh_or_path);
845	req->dataptr = SvPVbyte_nolen (req->data);	737	req->ptr1 = SvPVbyte_nolen (req->sv1);
846	}	738	}
847	else	739	else
848	{	740	{
849	req->type = REQ_FSTAT;	741	req->type = EIO_FSTAT;
850	req->fh = newSVsv (fh_or_path);
851	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	742	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		743	}
		744
		745	REQ_SEND;
		746	}
		747
		748	void
		749	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		750	PPCODE:
		751	{
		752	dREQ;
		753
		754	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		755	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		756	req->sv1 = newSVsv (fh_or_path);
		757
		758	if (SvPOK (fh_or_path))
852	}	759	{
		760	req->type = EIO_UTIME;
		761	req->ptr1 = SvPVbyte_nolen (req->sv1);
		762	}
		763	else
		764	{
		765	req->type = EIO_FUTIME;
		766	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		767	}
853		768
854	send_req (req);	769	REQ_SEND;
855	}	770	}
856		771
857	void	772	void
		773	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		774	PPCODE:
		775	{
		776	dREQ;
		777
		778	req->sv1 = newSVsv (fh_or_path);
		779	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		780
		781	if (SvPOK (fh_or_path))
		782	{
		783	req->type = EIO_TRUNCATE;
		784	req->ptr1 = SvPVbyte_nolen (req->sv1);
		785	}
		786	else
		787	{
		788	req->type = EIO_FTRUNCATE;
		789	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		790	}
		791
		792	REQ_SEND;
		793	}
		794
		795	void
		796	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		797	ALIAS:
		798	aio_chmod = EIO_CHMOD
		799	aio_fchmod = EIO_FCHMOD
		800	aio_mkdir = EIO_MKDIR
		801	PPCODE:
		802	{
		803	dREQ;
		804
		805	req->type = ix;
		806	req->int2 = mode;
		807	req->sv1 = newSVsv (fh_or_path);
		808
		809	if (ix == EIO_FCHMOD)
		810	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		811	else
		812	req->ptr1 = SvPVbyte_nolen (req->sv1);
		813
		814	REQ_SEND;
		815	}
		816
		817	void
		818	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		819	PPCODE:
		820	{
		821	dREQ;
		822
		823	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		824	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		825	req->sv1 = newSVsv (fh_or_path);
		826
		827	if (SvPOK (fh_or_path))
		828	{
		829	req->type = EIO_CHOWN;
		830	req->ptr1 = SvPVbyte_nolen (req->sv1);
		831	}
		832	else
		833	{
		834	req->type = EIO_FCHOWN;
		835	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		836	}
		837
		838	REQ_SEND;
		839	}
		840
		841	void
858	aio_unlink(pathname,callback=&PL_sv_undef)	842	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
859	SV * pathname
860	SV * callback
861	ALIAS:	843	ALIAS:
862	aio_unlink = REQ_UNLINK	844	aio_unlink = EIO_UNLINK
863	aio_rmdir = REQ_RMDIR	845	aio_rmdir = EIO_RMDIR
		846	aio_readdir = EIO_READDIR
864	CODE:	847	PPCODE:
865	{	848	{
866	dREQ;	849	dREQ;
867		850
868	req->type = ix;	851	req->type = ix;
869	req->data = newSVsv (pathname);	852	req->sv1 = newSVsv (pathname);
870	req->dataptr = SvPVbyte_nolen (req->data);	853	req->ptr1 = SvPVbyte_nolen (req->sv1);
		854
		855	REQ_SEND;
		856	}
		857
		858	void
		859	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		860	ALIAS:
		861	aio_link = EIO_LINK
		862	aio_symlink = EIO_SYMLINK
		863	aio_rename = EIO_RENAME
		864	PPCODE:
		865	{
		866	dREQ;
871		867
872	send_req (req);	868	req->type = ix;
873	}	869	req->sv1 = newSVsv (oldpath);
874		870	req->ptr1 = SvPVbyte_nolen (req->sv1);
875	void	871	req->sv2 = newSVsv (newpath);
876	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	872	req->ptr2 = SvPVbyte_nolen (req->sv2);
877	SV * oldpath
878	SV * newpath
879	SV * callback
880	CODE:
881	{
882	dREQ;
883		873
884	req->type = REQ_SYMLINK;	874	REQ_SEND;
885	req->fh = newSVsv (oldpath);	875	}
886	req->data2ptr = SvPVbyte_nolen (req->fh);	876
887	req->data = newSVsv (newpath);	877	void
888	req->dataptr = SvPVbyte_nolen (req->data);	878	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		879	PPCODE:
		880	{
		881	dREQ;
889		882
890	send_req (req);	883	req->type = EIO_MKNOD;
		884	req->sv1 = newSVsv (pathname);
		885	req->ptr1 = SvPVbyte_nolen (req->sv1);
		886	req->int2 = (mode_t)mode;
		887	req->offs = dev;
		888
		889	REQ_SEND;
891	}	890	}
892		891
893	void	892	void
		893	aio_busy (double delay, SV *callback=&PL_sv_undef)
		894	PPCODE:
		895	{
		896	dREQ;
		897
		898	req->type = EIO_BUSY;
		899	req->nv1 = delay < 0. ? 0. : delay;
		900
		901	REQ_SEND;
		902	}
		903
		904	void
		905	aio_group (SV *callback=&PL_sv_undef)
		906	PROTOTYPE: ;$
		907	PPCODE:
		908	{
		909	dREQ;
		910
		911	req->type = EIO_GROUP;
		912
		913	eio_submit (req);
		914	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		915	}
		916
		917	void
		918	aio_nop (SV *callback=&PL_sv_undef)
		919	ALIAS:
		920	aio_nop = EIO_NOP
		921	aio_sync = EIO_SYNC
		922	PPCODE:
		923	{
		924	dREQ;
		925
		926	req->type = ix;
		927
		928	REQ_SEND;
		929	}
		930
		931	int
		932	aioreq_pri (int pri = 0)
		933	PROTOTYPE: ;$
		934	CODE:
		935	RETVAL = next_pri - EIO_PRI_BIAS;
		936	if (items > 0)
		937	{
		938	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		939	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		940	next_pri = pri + EIO_PRI_BIAS;
		941	}
		942	OUTPUT:
		943	RETVAL
		944
		945	void
		946	aioreq_nice (int nice = 0)
		947	CODE:
		948	nice = next_pri - nice;
		949	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		950	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		951	next_pri = nice + EIO_PRI_BIAS;
		952
		953	void
894	flush()	954	flush ()
895	PROTOTYPE:	955	PROTOTYPE:
896	CODE:	956	CODE:
897	while (nreqs)	957	while (eio_nreqs ())
898	{	958	{
899	poll_wait ();	959	poll_wait ();
900	poll_cb ();	960	poll_cb ();
901	}	961	}
902		962
903	void	963	int
904	poll()	964	poll()
905	PROTOTYPE:	965	PROTOTYPE:
906	CODE:	966	CODE:
907	if (nreqs)
908	{
909	poll_wait ();	967	poll_wait ();
910	poll_cb ();	968	RETVAL = poll_cb ();
911	}	969	OUTPUT:
		970	RETVAL
912		971
913	int	972	int
914	poll_fileno()	973	poll_fileno()
915	PROTOTYPE:	974	PROTOTYPE:
916	CODE:	975	CODE:
…		…
928		987
929	void	988	void
930	poll_wait()	989	poll_wait()
931	PROTOTYPE:	990	PROTOTYPE:
932	CODE:	991	CODE:
933	if (nreqs)
934	poll_wait ();	992	poll_wait ();
935		993
936	int	994	int
937	nreqs()	995	nreqs()
938	PROTOTYPE:	996	PROTOTYPE:
939	CODE:	997	CODE:
940	RETVAL = nreqs;	998	RETVAL = eio_nreqs ();
941	OUTPUT:	999	OUTPUT:
942	RETVAL	1000	RETVAL
943		1001
		1002	int
		1003	nready()
		1004	PROTOTYPE:
		1005	CODE:
		1006	RETVAL = eio_nready ();
		1007	OUTPUT:
		1008	RETVAL
		1009
		1010	int
		1011	npending()
		1012	PROTOTYPE:
		1013	CODE:
		1014	RETVAL = eio_npending ();
		1015	OUTPUT:
		1016	RETVAL
		1017
		1018	int
		1019	nthreads()
		1020	PROTOTYPE:
		1021	CODE:
		1022	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		1023	RETVAL = started;
		1024	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		1025	OUTPUT:
		1026	RETVAL
		1027
		1028	void _on_next_submit (SV *cb)
		1029	CODE:
		1030	SvREFCNT_dec (on_next_submit);
		1031	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1032
		1033	PROTOTYPES: DISABLE
		1034
		1035	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1036
		1037	void
		1038	cancel (aio_req_ornot req)
		1039	CODE:
		1040	eio_cancel (req);
		1041
		1042	void
		1043	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1044	CODE:
		1045	SvREFCNT_dec (req->callback);
		1046	req->callback = newSVsv (callback);
		1047
		1048	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1049
		1050	void
		1051	add (aio_req grp, ...)
		1052	PPCODE:
		1053	{
		1054	int i;
		1055
		1056	if (grp->int1 == 2)
		1057	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1058
		1059	for (i = 1; i < items; ++i )
		1060	{
		1061	aio_req req;
		1062
		1063	if (GIMME_V != G_VOID)
		1064	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1065
		1066	req = SvAIO_REQ (ST (i));
		1067
		1068	if (req)
		1069	eio_grp_add (grp, req);
		1070	}
		1071	}
		1072
		1073	void
		1074	cancel_subs (aio_req_ornot req)
		1075	CODE:
		1076	req_cancel_subs (req);
		1077
		1078	void
		1079	result (aio_req grp, ...)
		1080	CODE:
		1081	{
		1082	int i;
		1083	AV *av;
		1084
		1085	grp->errorno = errno;
		1086
		1087	av = newAV ();
		1088
		1089	for (i = 1; i < items; ++i )
		1090	av_push (av, newSVsv (ST (i)));
		1091
		1092	SvREFCNT_dec (grp->sv1);
		1093	grp->sv1 = (SV *)av;
		1094	}
		1095
		1096	void
		1097	errno (aio_req grp, int errorno = errno)
		1098	CODE:
		1099	grp->errorno = errorno;
		1100
		1101	void
		1102	limit (aio_req grp, int limit)
		1103	CODE:
		1104	eio_grp_limit (grp, limit);
		1105
		1106	void
		1107	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1108	CODE:
		1109	{
		1110	SvREFCNT_dec (grp->sv2);
		1111	grp->sv2 = newSVsv (callback);
		1112
		1113	if (grp->int2 <= 0)
		1114	grp->int2 = 2;
		1115
		1116	eio_grp_limit (grp, grp->int2);
		1117	}
		1118

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