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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.36 by root, Tue Aug 23 01:18:04 2005 UTC vs.
Revision 1.117 by root, Sat May 10 20:02:09 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;	106	static SV *on_next_submit;
74	static volatile int nreqs;	107	static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
75	static int max_outstanding = 1<<30;	108	static int max_outstanding;
76	static int respipe [2];
77		109
78	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	110	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		111
82	static volatile aio_req reqs, reqe; /* queue start, queue end */	112	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)	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 void req_submit (eio_req *req)
		172	{
		173	eio_submit (req);
		174
		175	if (on_next_submit)
		176	{
		177	dSP;
		178	SV *cb = sv_2mortal (on_next_submit);
		179
		180	on_next_submit = 0;
		181
		182	PUSHMARK (SP);
		183	PUTBACK;
		184	call_sv (cb, G_DISCARD | G_EVAL);
		185	}
		186	}
		187
		188	static int req_invoke (eio_req *req)
120	{	189	{
121	dSP;	190	dSP;
122	int count = 0;
123	int do_croak = 0;
124	aio_req req;
125		191
126	for (;;)	192	if (req->flags & FLAG_SV2_RO_OFF)
		193	SvREADONLY_off (req->sv2);
		194
		195	if (!EIO_CANCELLED (req) && SvOK (req->callback))
127	{	196	{
128	pthread_mutex_lock (&reslock);	197	ENTER;
129	req = ress;	198	SAVETMPS;
		199	PUSHMARK (SP);
		200	EXTEND (SP, 1);
130		201
131	if (req)	202	switch (req->type)
132	{	203	{
133	ress = req->next;	204	case EIO_READDIR:
134
135	if (!ress)
136	{	205	{
137	/* read any signals sent by the worker threads */	206	SV *rv = &PL_sv_undef;
138	char buf [32];	207
139	while (read (respipe [0], buf, 32) == 32)	208	if (req->result >= 0)
140	;	209	{
		210	int i;
		211	char *buf = req->ptr2;
		212	AV *av = newAV ();
141		213
142	rese = 0;	214	av_extend (av, req->result - 1);
		215
		216	for (i = 0; i < req->result; ++i)
		217	{
		218	SV *sv = newSVpv (buf, 0);
		219
		220	av_store (av, i, sv);
		221	buf += SvCUR (sv) + 1;
		222	}
		223
		224	rv = sv_2mortal (newRV_noinc ((SV *)av));
		225	}
		226
		227	PUSHs (rv);
143	}	228	}
144	}
145
146	pthread_mutex_unlock (&reslock);
147
148	if (!req)
149	break;	229	break;
150		230
151	nreqs--;	231	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	{	232	{
179	/* convert fd to fh */	233	/* convert fd to fh */
180	SV *fh;	234	SV *fh = &PL_sv_undef;
181		235
182	PUTBACK;	236	if (req->result >= 0)
183	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	237	{
184	SPAGAIN;	238	GV *gv = (GV *)sv_newmortal ();
		239	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		240	char sym [64];
		241	int symlen;
		242
		243	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		244	gv_init (gv, stash, sym, symlen, 0);
185		245
186	fh = SvREFCNT_inc (POPs);	246	symlen = snprintf (
		247	sym,
		248	sizeof (sym),
		249	"%s&=%d",
		250	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		251	req->result
		252	);
187		253
		254	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		255	fh = (SV *)gv;
		256	}
		257
188	PUSHMARK (SP);	258	PUSHs (fh);
189	XPUSHs (sv_2mortal (fh));
190	}	259	}
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	/*****************************************************************************/
366	/* work around various missing functions */
367
368	#if !HAVE_PREADWRITE
369	# define pread aio_pread
370	# define pwrite aio_pwrite
371
372	/*
373	* make our pread/pwrite safe against themselves, but not against
374	* normal read/write by using a mutex. slows down execution a lot,
375	* but that's your problem, not mine.
376	*/
377	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
378
379	static ssize_t
380	pread (int fd, void *buf, size_t count, off_t offset)
381	{
382	ssize_t res;
383	off_t ooffset;
384
385	pthread_mutex_lock (&iolock);
386	ooffset = lseek (fd, 0, SEEK_CUR);
387	lseek (fd, offset, SEEK_SET);
388	res = read (fd, buf, count);
389	lseek (fd, ooffset, SEEK_SET);
390	pthread_mutex_unlock (&iolock);
391
392	return res;
393	}
394
395	static ssize_t
396	pwrite (int fd, void *buf, size_t count, off_t offset)
397	{
398	ssize_t res;
399	off_t ooffset;
400
401	pthread_mutex_lock (&iolock);
402	ooffset = lseek (fd, 0, SEEK_CUR);
403	lseek (fd, offset, SEEK_SET);
404	res = write (fd, buf, count);
405	lseek (fd, offset, SEEK_SET);
406	pthread_mutex_unlock (&iolock);
407
408	return res;
409	}
410	#endif
411
412	#if !HAVE_FDATASYNC
413	# define fdatasync fsync
414	#endif
415
416	#if !HAVE_READAHEAD
417	# define readahead aio_readahead
418
419	static char readahead_buf[4096];
420
421	static ssize_t
422	readahead (int fd, off_t offset, size_t count)
423	{
424	while (count > 0)
425	{
426	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
427
428	pread (fd, readahead_buf, len, offset);
429	offset += len;
430	count -= len;
431	}
432
433	errno = 0;
434	}
435	#endif
436
437	/* sendfile always needs emulation */
438	static ssize_t
439	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
440	{
441	ssize_t res;
442
443	if (!count)
444	return 0;
445
446	#if HAVE_SENDFILE
447	# if __linux
448	res = sendfile (ofd, ifd, &offset, count);
449
450	# elif __freebsd
451	/*
452	* Of course, the freebsd sendfile is a dire hack with no thoughts
453	* wasted on making it similar to other I/O functions.
454	*/
455	{
456	off_t sbytes;
457	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
458
459	if (res < 0 && sbytes)
460	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
461	res = sbytes;
462	}
463
464	# elif __hpux
465	res = sendfile (ofd, ifd, offset, count, 0, 0);
466
467	# elif __solaris
468	{
469	struct sendfilevec vec;
470	size_t sbytes;
471
472	vec.sfv_fd = ifd;
473	vec.sfv_flag = 0;
474	vec.sfv_off = offset;
475	vec.sfv_len = count;
476
477	res = sendfilev (ofd, &vec, 1, &sbytes);
478
479	if (res < 0 && sbytes)
480	res = sbytes;
481	}
482
483	# else
484	res = -1;
485	errno = ENOSYS;
486	# endif
487	#endif
488
489	if (res < 0
490	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
491	#if __solaris
492	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
493	#endif
494	)
495	)
496	{
497	/* emulate sendfile. this is a major pain in the ass */
498	char *buf = malloc (4096);
499	res = 0;
500
501	for (;;)
502	{
503	ssize_t cnt;
504
505	cnt = pread (ifd, buf, 4096, offset);
506
507	if (cnt <= 0)
508	{
509	if (cnt && !res) res = -1;
510	break;
511	}
512
513	cnt = write (ofd, buf, cnt);
514
515	if (cnt <= 0)
516	{
517	if (cnt && !res) res = -1;
518	break;
519	}
520
521	offset += cnt;
522	res += cnt;
523	}
524
525	{
526	int errorno = errno;
527	free (buf);
528	errno = errorno;
529	}
530	}
531
532	return res;
533	}
534
535	/*****************************************************************************/
536
537	static void *
538	aio_proc (void *thr_arg)
539	{
540	aio_req req;
541	int type;
542
543	do
544	{
545	pthread_mutex_lock (&reqlock);
546
547	for (;;)
548	{
549	req = reqs;
550
551	if (reqs)
552	{
553	reqs = reqs->next;
554	if (!reqs) reqe = 0;
555	}
556
557	if (req)
558	break;	260	break;
559		261
560	pthread_cond_wait (&reqwait, &reqlock);	262	case EIO_GROUP:
561	}	263	req->int1 = 2; /* mark group as finished */
562		264
563	pthread_mutex_unlock (&reqlock);	265	if (req->sv1)
564
565	errno = 0; /* strictly unnecessary */
566
567	type = req->type;
568
569	switch (type)
570	{	266	{
571	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	267	int i;
572	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	268	AV *av = (AV *)req->sv1;
573		269
574	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	270	EXTEND (SP, AvFILL (av) + 1);
575	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	271	for (i = 0; i <= AvFILL (av); ++i)
576		272	PUSHs (*av_fetch (av, i, 0));
577	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	273	}
578	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
579	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
580
581	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
582	case REQ_CLOSE: req->result = close (req->fd); break;
583	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
584	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
585	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
586
587	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
588	case REQ_FSYNC: req->result = fsync (req->fd); break;
589
590	case REQ_QUIT:
591	break;	274	break;
592		275
		276	case EIO_NOP:
		277	case EIO_BUSY:
		278	break;
		279
		280	case EIO_READLINK:
		281	if (req->result > 0)
		282	{
		283	SvCUR_set (req->sv2, req->result);
		284	*SvEND (req->sv2) = 0;
		285	PUSHs (req->sv2);
		286	}
		287	break;
		288
		289	case EIO_STAT:
		290	case EIO_LSTAT:
		291	case EIO_FSTAT:
		292	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		293	PL_laststatval = req->result;
		294	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		295	PUSHs (sv_2mortal (newSViv (req->result)));
		296	break;
		297
		298	case EIO_READ:
		299	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		300	*SvEND (req->sv2) = 0;
		301	PUSHs (sv_2mortal (newSViv (req->result)));
		302	break;
		303
		304	case EIO_DUP2:
		305	if (req->result > 0)
		306	req->result = 0;
		307	/* FALLTHROUGH */
		308
593	default:	309	default:
594	req->result = ENOSYS;	310	PUSHs (sv_2mortal (newSViv (req->result)));
595	break;	311	break;
596	}	312	}
597		313
598	req->errorno = errno;	314	errno = req->errorno;
599		315
600	pthread_mutex_lock (&reslock);	316	PUTBACK;
		317	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		318	SPAGAIN;
601		319
602	req->next = 0;	320	FREETMPS;
		321	LEAVE;
603		322
604	if (rese)	323	PUTBACK;
605	{
606	rese->next = req;
607	rese = req;
608	}
609	else
610	{
611	rese = ress = req;
612
613	/* write a dummy byte to the pipe so fh becomes ready */
614	write (respipe [1], &respipe, 1);
615	}
616
617	pthread_mutex_unlock (&reslock);
618	}	324	}
619	while (type != REQ_QUIT);
620		325
		326	return !!SvTRUE (ERRSV);
		327	}
		328
		329	static void req_destroy (aio_req req)
		330	{
		331	if (req->self)
		332	{
		333	sv_unmagic (req->self, PERL_MAGIC_ext);
		334	SvREFCNT_dec (req->self);
		335	}
		336
		337	SvREFCNT_dec (req->sv1);
		338	SvREFCNT_dec (req->sv2);
		339	SvREFCNT_dec (req->callback);
		340
		341	Safefree (req);
		342	}
		343
		344	static void req_cancel_subs (aio_req grp)
		345	{
		346	aio_req sub;
		347
		348	if (grp->type != EIO_GROUP)
		349	return;
		350
		351	SvREFCNT_dec (grp->sv2);
		352	grp->sv2 = 0;
		353
		354	eio_grp_cancel (grp);
		355	}
		356
		357	#ifdef USE_SOCKETS_AS_HANDLES
		358	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		359	#else
		360	# define TO_SOCKET(x) (x)
		361	#endif
		362
		363	static void
		364	create_respipe (void)
		365	{
		366	int old_readfd = respipe [0];
		367
		368	if (respipe [1] >= 0)
		369	respipe_close (TO_SOCKET (respipe [1]));
		370
		371	#ifdef _WIN32
		372	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		373	#else
		374	if (pipe (respipe))
		375	#endif
		376	croak ("unable to initialize result pipe");
		377
		378	if (old_readfd >= 0)
		379	{
		380	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		381	croak ("unable to initialize result pipe(2)");
		382
		383	respipe_close (respipe [0]);
		384	respipe [0] = old_readfd;
		385	}
		386
		387	#ifdef _WIN32
		388	int arg = 1;
		389	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		390	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		391	#else
		392	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		393	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		394	#endif
		395	croak ("unable to initialize result pipe(3)");
		396
		397	respipe_osf [0] = TO_SOCKET (respipe [0]);
		398	respipe_osf [1] = TO_SOCKET (respipe [1]);
		399	}
		400
		401	static void poll_wait (void)
		402	{
		403	fd_set rfd;
		404
		405	while (eio_nreqs ())
		406	{
		407	int size;
		408
		409	X_LOCK (reslock);
		410	size = res_queue.size;
		411	X_UNLOCK (reslock);
		412
		413	if (size)
		414	return;
		415
		416	maybe_start_thread ();
		417
		418	FD_ZERO (&rfd);
		419	FD_SET (respipe [0], &rfd);
		420
		421	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		422	}
		423	}
		424
		425	static int poll_cb (void)
		426	{
		427	int res;
		428
		429	do
		430	{
		431	res = eio_poll ();
		432
		433	if (res > 0)
		434	croak (0);
		435	}
		436	while (max_outstanding && max_outstanding <= eio_nreqs ());
		437
621	return 0;	438	return res;
		439	}
		440
		441	static void atfork_child (void)
		442	{
		443	create_respipe ();
622	}	444	}
623		445
624	#define dREQ \	446	#define dREQ \
625	aio_req req; \	447	aio_req req; \
		448	int req_pri = next_pri; \
		449	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
626	\	450	\
627	if (SvOK (callback) && !SvROK (callback)) \	451	if (SvOK (callback) && !SvROK (callback)) \
628	croak ("clalback must be undef or of reference type"); \	452	croak ("callback must be undef or of reference type"); \
629	\	453	\
630	Newz (0, req, 1, aio_cb); \	454	Newz (0, req, 1, eio_req); \
631	if (!req) \	455	if (!req) \
632	croak ("out of memory during aio_req allocation"); \	456	croak ("out of memory during eio_req allocation"); \
633	\	457	\
634	req->callback = newSVsv (callback);	458	req->callback = newSVsv (callback); \
		459	req->pri = req_pri
		460
		461	#define REQ_SEND \
		462	req_submit (req); \
		463	\
		464	if (GIMME_V != G_VOID) \
		465	XPUSHs (req_sv (req, AIO_REQ_KLASS));
635		466
636	MODULE = IO::AIO PACKAGE = IO::AIO	467	MODULE = IO::AIO PACKAGE = IO::AIO
637		468
638	PROTOTYPES: ENABLE	469	PROTOTYPES: ENABLE
639		470
640	BOOT:	471	BOOT:
641	{	472	{
642	create_pipe ();	473	stash = gv_stashpv ("IO::AIO", 1);
643	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
644	}
645		474
		475	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		476	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		477	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		478	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		479	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		480	#ifdef _WIN32
		481	X_MUTEX_CHECK (wrklock);
		482	X_MUTEX_CHECK (reslock);
		483	X_MUTEX_CHECK (reqlock);
		484	X_MUTEX_CHECK (reqwait);
		485	X_MUTEX_CHECK (preadwritelock);
		486	X_MUTEX_CHECK (readdirlock);
		487
		488	X_COND_CHECK (reqwait);
		489	#else
		490	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		491	#endif
		492
		493	create_respipe ();
		494
		495	if (eio_init (want_poll, done_poll) < 0)
		496	croak ("IO::AIO: unable to initialise eio library");
		497
		498	/* atfork child called in fifo order, so before eio's handler */
		499	X_THREAD_ATFORK (0, 0, atfork_child);
		500	}
		501
646	void	502	void
647	min_parallel(nthreads)	503	max_poll_reqs (int nreqs)
648	int nthreads
649	PROTOTYPE: $	504	PROTOTYPE: $
		505	CODE:
		506	eio_set_max_poll_reqs (nreqs);
650		507
651	void	508	void
652	max_parallel(nthreads)	509	max_poll_time (double nseconds)
653	int nthreads
654	PROTOTYPE: $	510	PROTOTYPE: $
655
656	int
657	max_outstanding(nreqs)
658	int nreqs
659	PROTOTYPE: $
660	CODE:	511	CODE:
661	RETVAL = max_outstanding;	512	eio_set_max_poll_time (nseconds);
		513
		514	void
		515	min_parallel (int nthreads)
		516	PROTOTYPE: $
		517	CODE:
		518	eio_set_min_parallel (nthreads);
		519
		520	void
		521	max_parallel (int nthreads)
		522	PROTOTYPE: $
		523	CODE:
		524	eio_set_max_parallel (nthreads);
		525
		526	void
		527	max_idle (int nthreads)
		528	PROTOTYPE: $
		529	CODE:
		530	eio_set_max_idle (nthreads);
		531
		532	void
		533	max_outstanding (int maxreqs)
		534	PROTOTYPE: $
		535	CODE:
662	max_outstanding = nreqs;	536	max_outstanding = maxreqs;
663		537
664	void	538	void
665	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	539	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
666	SV * pathname
667	int flags
668	int mode
669	SV * callback
670	PROTOTYPE: $$$;$	540	PROTOTYPE: $$$;$
671	CODE:	541	PPCODE:
672	{	542	{
673	dREQ;	543	dREQ;
674		544
675	req->type = REQ_OPEN;	545	req->type = EIO_OPEN;
676	req->data = newSVsv (pathname);	546	req->sv1 = newSVsv (pathname);
677	req->dataptr = SvPVbyte_nolen (req->data);	547	req->ptr1 = SvPVbyte_nolen (req->sv1);
678	req->fd = flags;	548	req->int1 = flags;
679	req->mode = mode;	549	req->int2 = mode;
680		550
681	send_req (req);	551	REQ_SEND;
682	}	552	}
683		553
684	void	554	void
685	aio_close(fh,callback=&PL_sv_undef)	555	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
686	SV * fh
687	SV * callback
688	PROTOTYPE: $;$	556	PROTOTYPE: $;$
689	ALIAS:	557	ALIAS:
690	aio_close = REQ_CLOSE
691	aio_fsync = REQ_FSYNC	558	aio_fsync = EIO_FSYNC
692	aio_fdatasync = REQ_FDATASYNC	559	aio_fdatasync = EIO_FDATASYNC
693	CODE:	560	PPCODE:
694	{	561	{
695	dREQ;	562	dREQ;
696		563
697	req->type = ix;	564	req->type = ix;
698	req->fh = newSVsv (fh);	565	req->sv1 = newSVsv (fh);
699	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	566	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
700		567
701	send_req (req);	568	REQ_SEND (req);
702	}	569	}
703		570
704	void	571	void
		572	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		573	PROTOTYPE: $;$
		574	PPCODE:
		575	{
		576	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		577	dREQ;
		578
		579	if (close_pipe < 0)
		580	{
		581	int pipefd [2];
		582
		583	if (pipe (pipefd) < 0
		584	|| close (pipefd [1]) < 0
		585	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		586	abort (); /*D*/
		587
		588	close_pipe = pipefd [0];
		589	}
		590
		591	req->type = EIO_DUP2;
		592	req->int1 = close_pipe;
		593	req->sv2 = newSVsv (fh);
		594	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		595
		596	REQ_SEND (req);
		597	}
		598
		599	void
705	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	600	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
706	SV * fh
707	UV offset
708	UV length
709	SV * data
710	UV dataoffset
711	SV * callback
712	ALIAS:	601	ALIAS:
713	aio_read = REQ_READ	602	aio_read = EIO_READ
714	aio_write = REQ_WRITE	603	aio_write = EIO_WRITE
715	PROTOTYPE: $$$$$;$	604	PROTOTYPE: $$$$$;$
716	CODE:	605	PPCODE:
717	{	606	{
718	aio_req req;
719	STRLEN svlen;	607	STRLEN svlen;
720	char *svptr = SvPVbyte (data, svlen);	608	char *svptr = SvPVbyte (data, svlen);
		609	UV len = SvUV (length);
721		610
722	SvUPGRADE (data, SVt_PV);	611	SvUPGRADE (data, SVt_PV);
723	SvPOK_on (data);	612	SvPOK_on (data);
724		613
725	if (dataoffset < 0)	614	if (dataoffset < 0)
726	dataoffset += svlen;	615	dataoffset += svlen;
727		616
728	if (dataoffset < 0 || dataoffset > svlen)	617	if (dataoffset < 0 || dataoffset > svlen)
729	croak ("data offset outside of string");	618	croak ("dataoffset outside of data scalar");
730		619
731	if (ix == REQ_WRITE)	620	if (ix == EIO_WRITE)
732	{	621	{
733	/* write: check length and adjust. */	622	/* write: check length and adjust. */
734	if (length < 0 || length + dataoffset > svlen)	623	if (!SvOK (length) || len + dataoffset > svlen)
735	length = svlen - dataoffset;	624	len = svlen - dataoffset;
736	}	625	}
737	else	626	else
738	{	627	{
739	/* read: grow scalar as necessary */	628	/* read: grow scalar as necessary */
740	svptr = SvGROW (data, length + dataoffset);	629	svptr = SvGROW (data, len + dataoffset + 1);
741	}	630	}
742		631
743	if (length < 0)	632	if (len < 0)
744	croak ("length must not be negative");	633	croak ("length must not be negative");
745		634
746	{	635	{
747	dREQ;	636	dREQ;
748		637
749	req->type = ix;	638	req->type = ix;
750	req->fh = newSVsv (fh);	639	req->sv1 = newSVsv (fh);
751	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	640	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
752	: IoOFP (sv_2io (fh)));	641	: IoOFP (sv_2io (fh)));
		642	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
753	req->offset = offset;	643	req->size = len;
754	req->length = length;
755	req->data = SvREFCNT_inc (data);	644	req->sv2 = SvREFCNT_inc (data);
756	req->dataptr = (char *)svptr + dataoffset;	645	req->ptr2 = (char *)svptr + dataoffset;
		646	req->stroffset = dataoffset;
757		647
758	if (!SvREADONLY (data))	648	if (!SvREADONLY (data))
759	{	649	{
760	SvREADONLY_on (data);	650	SvREADONLY_on (data);
761	req->data2ptr = (void *)data;	651	req->flags |= FLAG_SV2_RO_OFF;
762	}	652	}
763		653
764	send_req (req);	654	REQ_SEND;
765	}	655	}
766	}	656	}
767		657
768	void	658	void
		659	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		660	PROTOTYPE: $$;$
		661	PPCODE:
		662	{
		663	SV *data;
		664	dREQ;
		665
		666	data = newSV (NAME_MAX);
		667	SvPOK_on (data);
		668
		669	req->type = EIO_READLINK;
		670	req->sv1 = newSVsv (path);
		671	req->ptr1 = SvPVbyte_nolen (req->sv1);
		672	req->sv2 = data;
		673	req->ptr2 = SvPVbyte_nolen (data);
		674
		675	REQ_SEND;
		676	}
		677
		678	void
769	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	679	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
770	SV * out_fh
771	SV * in_fh
772	UV in_offset
773	UV length
774	SV * callback
775	PROTOTYPE: $$$$;$	680	PROTOTYPE: $$$$;$
776	CODE:	681	PPCODE:
777	{	682	{
778	dREQ;	683	dREQ;
779		684
780	req->type = REQ_SENDFILE;	685	req->type = EIO_SENDFILE;
781	req->fh = newSVsv (out_fh);	686	req->sv1 = newSVsv (out_fh);
782	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	687	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
783	req->fh2 = newSVsv (in_fh);	688	req->sv2 = newSVsv (in_fh);
784	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	689	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
785	req->offset = in_offset;	690	req->offs = SvVAL64 (in_offset);
786	req->length = length;	691	req->size = length;
787		692
788	send_req (req);	693	REQ_SEND;
789	}	694	}
790		695
791	void	696	void
792	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	697	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
793	SV * fh
794	UV offset
795	IV length
796	SV * callback
797	PROTOTYPE: $$$;$	698	PROTOTYPE: $$$;$
798	CODE:	699	PPCODE:
799	{	700	{
800	dREQ;	701	dREQ;
801		702
802	req->type = REQ_READAHEAD;	703	req->type = EIO_READAHEAD;
803	req->fh = newSVsv (fh);	704	req->sv1 = newSVsv (fh);
804	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	705	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
805	req->offset = offset;	706	req->offs = SvVAL64 (offset);
806	req->length = length;	707	req->size = length;
807		708
808	send_req (req);	709	REQ_SEND;
809	}	710	}
810		711
811	void	712	void
812	aio_stat(fh_or_path,callback=&PL_sv_undef)	713	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
813	SV * fh_or_path
814	SV * callback
815	ALIAS:	714	ALIAS:
816	aio_stat = REQ_STAT	715	aio_stat = EIO_STAT
817	aio_lstat = REQ_LSTAT	716	aio_lstat = EIO_LSTAT
818	CODE:	717	PPCODE:
819	{	718	{
820	dREQ;	719	dREQ;
821		720
822	New (0, req->statdata, 1, Stat_t);	721	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
823	if (!req->statdata)	722	if (!req->ptr2)
824	{	723	{
825	free_req (req);	724	req_destroy (req);
826	croak ("out of memory during aio_req->statdata allocation");	725	croak ("out of memory during aio_stat statdata allocation");
827	}	726	}
		727
		728	req->flags |= EIO_FLAG_PTR2_FREE;
		729	req->sv1 = newSVsv (fh_or_path);
828		730
829	if (SvPOK (fh_or_path))	731	if (SvPOK (fh_or_path))
830	{	732	{
831	req->type = ix;	733	req->type = ix;
832	req->data = newSVsv (fh_or_path);
833	req->dataptr = SvPVbyte_nolen (req->data);	734	req->ptr1 = SvPVbyte_nolen (req->sv1);
834	}	735	}
835	else	736	else
836	{	737	{
837	req->type = REQ_FSTAT;	738	req->type = EIO_FSTAT;
838	req->fh = newSVsv (fh_or_path);
839	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	739	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		740	}
		741
		742	REQ_SEND;
		743	}
		744
		745	void
		746	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		747	PPCODE:
		748	{
		749	dREQ;
		750
		751	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		752	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		753	req->sv1 = newSVsv (fh_or_path);
		754
		755	if (SvPOK (fh_or_path))
840	}	756	{
		757	req->type = EIO_UTIME;
		758	req->ptr1 = SvPVbyte_nolen (req->sv1);
		759	}
		760	else
		761	{
		762	req->type = EIO_FUTIME;
		763	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		764	}
841		765
842	send_req (req);	766	REQ_SEND;
843	}	767	}
844		768
845	void	769	void
		770	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		771	PPCODE:
		772	{
		773	dREQ;
		774
		775	req->sv1 = newSVsv (fh_or_path);
		776	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		777
		778	if (SvPOK (fh_or_path))
		779	{
		780	req->type = EIO_TRUNCATE;
		781	req->ptr1 = SvPVbyte_nolen (req->sv1);
		782	}
		783	else
		784	{
		785	req->type = EIO_FTRUNCATE;
		786	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		787	}
		788
		789	REQ_SEND;
		790	}
		791
		792	void
		793	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		794	ALIAS:
		795	aio_chmod = EIO_CHMOD
		796	aio_fchmod = EIO_FCHMOD
		797	aio_mkdir = EIO_MKDIR
		798	PPCODE:
		799	{
		800	dREQ;
		801
		802	req->type = ix;
		803	req->int2 = mode;
		804	req->sv1 = newSVsv (fh_or_path);
		805
		806	if (ix == EIO_FCHMOD)
		807	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		808	else
		809	req->ptr1 = SvPVbyte_nolen (req->sv1);
		810
		811	REQ_SEND;
		812	}
		813
		814	void
		815	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		816	PPCODE:
		817	{
		818	dREQ;
		819
		820	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		821	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		822	req->sv1 = newSVsv (fh_or_path);
		823
		824	if (SvPOK (fh_or_path))
		825	{
		826	req->type = EIO_CHOWN;
		827	req->ptr1 = SvPVbyte_nolen (req->sv1);
		828	}
		829	else
		830	{
		831	req->type = EIO_FCHOWN;
		832	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		833	}
		834
		835	REQ_SEND;
		836	}
		837
		838	void
846	aio_unlink(pathname,callback=&PL_sv_undef)	839	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
847	SV * pathname
848	SV * callback
849	ALIAS:	840	ALIAS:
850	aio_unlink = REQ_UNLINK	841	aio_unlink = EIO_UNLINK
851	aio_rmdir = REQ_RMDIR	842	aio_rmdir = EIO_RMDIR
		843	aio_readdir = EIO_READDIR
852	CODE:	844	PPCODE:
853	{	845	{
854	dREQ;	846	dREQ;
855		847
856	req->type = ix;	848	req->type = ix;
857	req->data = newSVsv (pathname);	849	req->sv1 = newSVsv (pathname);
858	req->dataptr = SvPVbyte_nolen (req->data);	850	req->ptr1 = SvPVbyte_nolen (req->sv1);
		851
		852	REQ_SEND;
		853	}
		854
		855	void
		856	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		857	ALIAS:
		858	aio_link = EIO_LINK
		859	aio_symlink = EIO_SYMLINK
		860	aio_rename = EIO_RENAME
		861	PPCODE:
		862	{
		863	dREQ;
859		864
860	send_req (req);	865	req->type = ix;
861	}	866	req->sv1 = newSVsv (oldpath);
862		867	req->ptr1 = SvPVbyte_nolen (req->sv1);
863	void	868	req->sv2 = newSVsv (newpath);
864	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	869	req->ptr2 = SvPVbyte_nolen (req->sv2);
865	SV * oldpath
866	SV * newpath
867	SV * callback
868	CODE:
869	{
870	dREQ;
871		870
872	req->type = REQ_SYMLINK;	871	REQ_SEND;
873	req->fh = newSVsv (oldpath);	872	}
874	req->data2ptr = SvPVbyte_nolen (req->fh);	873
875	req->data = newSVsv (newpath);	874	void
876	req->dataptr = SvPVbyte_nolen (req->data);	875	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		876	PPCODE:
		877	{
		878	dREQ;
877		879
878	send_req (req);	880	req->type = EIO_MKNOD;
		881	req->sv1 = newSVsv (pathname);
		882	req->ptr1 = SvPVbyte_nolen (req->sv1);
		883	req->int2 = (mode_t)mode;
		884	req->offs = dev;
		885
		886	REQ_SEND;
879	}	887	}
880		888
881	void	889	void
		890	aio_busy (double delay, SV *callback=&PL_sv_undef)
		891	PPCODE:
		892	{
		893	dREQ;
		894
		895	req->type = EIO_BUSY;
		896	req->nv1 = delay < 0. ? 0. : delay;
		897
		898	REQ_SEND;
		899	}
		900
		901	void
		902	aio_group (SV *callback=&PL_sv_undef)
		903	PROTOTYPE: ;$
		904	PPCODE:
		905	{
		906	dREQ;
		907
		908	req->type = EIO_GROUP;
		909
		910	eio_submit (req);
		911	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		912	}
		913
		914	void
		915	aio_nop (SV *callback=&PL_sv_undef)
		916	ALIAS:
		917	aio_nop = EIO_NOP
		918	aio_sync = EIO_SYNC
		919	PPCODE:
		920	{
		921	dREQ;
		922
		923	req->type = ix;
		924
		925	REQ_SEND;
		926	}
		927
		928	int
		929	aioreq_pri (int pri = 0)
		930	PROTOTYPE: ;$
		931	CODE:
		932	RETVAL = next_pri - EIO_PRI_BIAS;
		933	if (items > 0)
		934	{
		935	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		936	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		937	next_pri = pri + EIO_PRI_BIAS;
		938	}
		939	OUTPUT:
		940	RETVAL
		941
		942	void
		943	aioreq_nice (int nice = 0)
		944	CODE:
		945	nice = next_pri - nice;
		946	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		947	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		948	next_pri = nice + EIO_PRI_BIAS;
		949
		950	void
882	flush()	951	flush ()
883	PROTOTYPE:	952	PROTOTYPE:
884	CODE:	953	CODE:
885	while (nreqs)	954	while (eio_nreqs ())
886	{	955	{
887	poll_wait ();	956	poll_wait ();
888	poll_cb ();	957	poll_cb ();
889	}	958	}
890		959
891	void	960	int
892	poll()	961	poll()
893	PROTOTYPE:	962	PROTOTYPE:
894	CODE:	963	CODE:
895	if (nreqs)
896	{
897	poll_wait ();	964	poll_wait ();
898	poll_cb ();	965	RETVAL = poll_cb ();
899	}	966	OUTPUT:
		967	RETVAL
900		968
901	int	969	int
902	poll_fileno()	970	poll_fileno()
903	PROTOTYPE:	971	PROTOTYPE:
904	CODE:	972	CODE:
…		…
916		984
917	void	985	void
918	poll_wait()	986	poll_wait()
919	PROTOTYPE:	987	PROTOTYPE:
920	CODE:	988	CODE:
921	if (nreqs)
922	poll_wait ();	989	poll_wait ();
923		990
924	int	991	int
925	nreqs()	992	nreqs()
926	PROTOTYPE:	993	PROTOTYPE:
927	CODE:	994	CODE:
928	RETVAL = nreqs;	995	RETVAL = eio_nreqs ();
929	OUTPUT:	996	OUTPUT:
930	RETVAL	997	RETVAL
931		998
		999	int
		1000	nready()
		1001	PROTOTYPE:
		1002	CODE:
		1003	RETVAL = eio_nready ();
		1004	OUTPUT:
		1005	RETVAL
		1006
		1007	int
		1008	npending()
		1009	PROTOTYPE:
		1010	CODE:
		1011	RETVAL = eio_npending ();
		1012	OUTPUT:
		1013	RETVAL
		1014
		1015	int
		1016	nthreads()
		1017	PROTOTYPE:
		1018	CODE:
		1019	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		1020	RETVAL = started;
		1021	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		1022	OUTPUT:
		1023	RETVAL
		1024
		1025	void _on_next_submit (SV *cb)
		1026	CODE:
		1027	SvREFCNT_dec (on_next_submit);
		1028	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1029
		1030	PROTOTYPES: DISABLE
		1031
		1032	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1033
		1034	void
		1035	cancel (aio_req_ornot req)
		1036	CODE:
		1037	eio_cancel (req);
		1038
		1039	void
		1040	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1041	CODE:
		1042	SvREFCNT_dec (req->callback);
		1043	req->callback = newSVsv (callback);
		1044
		1045	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1046
		1047	void
		1048	add (aio_req grp, ...)
		1049	PPCODE:
		1050	{
		1051	int i;
		1052
		1053	if (grp->int1 == 2)
		1054	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1055
		1056	for (i = 1; i < items; ++i )
		1057	{
		1058	aio_req req;
		1059
		1060	if (GIMME_V != G_VOID)
		1061	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1062
		1063	req = SvAIO_REQ (ST (i));
		1064
		1065	if (req)
		1066	eio_grp_add (grp, req);
		1067	}
		1068	}
		1069
		1070	void
		1071	cancel_subs (aio_req_ornot req)
		1072	CODE:
		1073	req_cancel_subs (req);
		1074
		1075	void
		1076	result (aio_req grp, ...)
		1077	CODE:
		1078	{
		1079	int i;
		1080	AV *av;
		1081
		1082	grp->errorno = errno;
		1083
		1084	av = newAV ();
		1085
		1086	for (i = 1; i < items; ++i )
		1087	av_push (av, newSVsv (ST (i)));
		1088
		1089	SvREFCNT_dec (grp->sv1);
		1090	grp->sv1 = (SV *)av;
		1091	}
		1092
		1093	void
		1094	errno (aio_req grp, int errorno = errno)
		1095	CODE:
		1096	grp->errorno = errorno;
		1097
		1098	void
		1099	limit (aio_req grp, int limit)
		1100	CODE:
		1101	eio_grp_limit (grp, limit);
		1102
		1103	void
		1104	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1105	CODE:
		1106	{
		1107	SvREFCNT_dec (grp->sv2);
		1108	grp->sv2 = newSVsv (callback);
		1109
		1110	if (grp->int2 <= 0)
		1111	grp->int2 = 2;
		1112
		1113	eio_grp_limit (grp, grp->int2);
		1114	}
		1115

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