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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.39 by root, Mon Feb 6 23:54:12 2006 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>
11
12	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
		11	#include <errno.h>
13	#include <sys/types.h>	12	#include <sys/types.h>
14	#include <sys/stat.h>	13	#include <sys/stat.h>
15	#include <limits.h>	14	#include <limits.h>
16	#include <unistd.h>
17	#include <fcntl.h>	15	#include <fcntl.h>
18	#include <signal.h>
19	#include <sched.h>	16	#include <sched.h>
20		17
21	#if HAVE_SENDFILE	18	#ifdef _WIN32
22	# if __linux	19
23	# include <sys/sendfile.h>	20	# define EIO_STRUCT_DIRENT Direntry_t
24	# elif __freebsd	21	# undef malloc
25	# include <sys/socket.h>	22	# undef free
26	# include <sys/uio.h>	23
27	# elif __hpux	24	// perl overrides all those nice win32 functions
28	# include <sys/socket.h>	25	# undef open
29	# elif __solaris /* not yet */	26	# undef read
30	# 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
31	# else	56	#else
32	# error sendfile support requested but not available	57
33	# 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
34	#endif	65	#endif
35		66
36	/* used for struct dirent, AIX doesn't provide it */	67	#define EIO_STRUCT_STAT Stat_t
37	#ifndef NAME_MAX	68
38	# define NAME_MAX 4096	69	/* use NV for 32 bit perls as it allows larger offsets */
		70	#if IVSIZE >= 8
		71	# define SvVAL64 SvIV
		72	#else
		73	# define SvVAL64 SvNV
39	#endif	74	#endif
40		75
41	#if __ia64	76	static HV *stash;
42	# define STACKSIZE 65536	77	typedef SV SV8; /* byte-sv, used for argument-checking */
43	#else	78
44	# define STACKSIZE 8192	79	#define AIO_REQ_KLASS "IO::AIO::REQ"
45	#endif	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)
46		96
47	enum {	97	enum {
48	REQ_QUIT,	98	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
49	REQ_OPEN, REQ_CLOSE,
50	REQ_READ, REQ_WRITE, REQ_READAHEAD,
51	REQ_SENDFILE,
52	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
53	REQ_FSYNC, REQ_FDATASYNC,
54	REQ_UNLINK, REQ_RMDIR,
55	REQ_READDIR,
56	REQ_SYMLINK,
57	};	99	};
58		100
59	typedef struct aio_cb {	101	#include "libeio/eio.c"
60	struct aio_cb *volatile next;
61		102
62	int type;
63
64	/* should receive a cleanup, with unions */
65	int fd, fd2;
66	off_t offset;
67	size_t length;
68	ssize_t result;
69	mode_t mode; /* open */
70	int errorno;
71	SV *data, *callback;
72	SV *fh, *fh2;
73	void *dataptr, *data2ptr;
74	STRLEN dataoffset;
75
76	Stat_t *statdata;
77	} aio_cb;
78
79	typedef aio_cb *aio_req;	103	typedef eio_req *aio_req;
		104	typedef eio_req *aio_req_ornot;
80		105
81	static int started, wanted;	106	static SV *on_next_submit;
82	static volatile int nreqs;	107	static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
83	static int max_outstanding = 1<<30;	108	static int max_outstanding;
84	static int respipe [2];
85		109
86	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	110	static int respipe_osf [2], respipe [2] = { -1, -1 };
87	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
88	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
89		111
90	static volatile aio_req reqs, reqe; /* queue start, queue end */	112	static void req_destroy (aio_req req);
91	static volatile aio_req ress, rese; /* queue start, queue end */
92
93	static void free_req (aio_req req)	113	static void req_cancel (aio_req req);
94	{
95	if (req->data)
96	SvREFCNT_dec (req->data);
97		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	{
98	if (req->fh)	132	if (!req->self)
99	SvREFCNT_dec (req->fh);
100
101	if (req->fh2)
102	SvREFCNT_dec (req->fh2);
103
104	if (req->statdata)
105	Safefree (req->statdata);
106
107	if (req->callback)
108	SvREFCNT_dec (req->callback);
109
110	if (req->type == REQ_READDIR && req->result >= 0)
111	free (req->data2ptr);
112
113	Safefree (req);
114	}
115
116	static void
117	poll_wait ()
118	{
119	if (nreqs && !ress)
120	{	133	{
121	fd_set rfd;	134	req->self = (SV *)newHV ();
122	FD_ZERO(&rfd);	135	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
123	FD_SET(respipe [0], &rfd);
124
125	select (respipe [0] + 1, &rfd, 0, 0, 0);
126	}	136	}
127	}
128		137
129	static int	138	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
130	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)
131	{	189	{
132	dSP;	190	dSP;
133	int count = 0;
134	int do_croak = 0;
135	aio_req req;
136		191
137	for (;;)	192	if (req->flags & FLAG_SV2_RO_OFF)
		193	SvREADONLY_off (req->sv2);
		194
		195	if (!EIO_CANCELLED (req) && SvOK (req->callback))
138	{	196	{
139	pthread_mutex_lock (&reslock);	197	ENTER;
140	req = ress;	198	SAVETMPS;
		199	PUSHMARK (SP);
		200	EXTEND (SP, 1);
141		201
142	if (req)	202	switch (req->type)
143	{	203	{
144	ress = req->next;	204	case EIO_READDIR:
145
146	if (!ress)
147	{
148	/* read any signals sent by the worker threads */
149	char buf [32];
150	while (read (respipe [0], buf, 32) == 32)
151	;
152
153	rese = 0;
154	}
155	}
156
157	pthread_mutex_unlock (&reslock);
158
159	if (!req)
160	break;
161
162	nreqs--;
163
164	if (req->type == REQ_QUIT)
165	started--;
166	else
167	{
168	int errorno = errno;
169	errno = req->errorno;
170
171	if (req->type == REQ_READ)
172	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
173
174	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
175	SvREADONLY_off (req->data);
176
177	if (req->statdata)
178	{
179	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
180	PL_laststatval = req->result;
181	PL_statcache = *(req->statdata);
182	}
183
184	ENTER;
185	PUSHMARK (SP);
186
187	if (req->type == REQ_READDIR)
188	{	205	{
189	SV *rv = &PL_sv_undef;	206	SV *rv = &PL_sv_undef;
190		207
191	if (req->result >= 0)	208	if (req->result >= 0)
192	{	209	{
		210	int i;
193	char *buf = req->data2ptr;	211	char *buf = req->ptr2;
194	AV *av = newAV ();	212	AV *av = newAV ();
195		213
196	while (req->result)	214	av_extend (av, req->result - 1);
		215
		216	for (i = 0; i < req->result; ++i)
197	{	217	{
198	SV *sv = newSVpv (buf, 0);	218	SV *sv = newSVpv (buf, 0);
199		219
200	av_push (av, sv);	220	av_store (av, i, sv);
201	buf += SvCUR (sv) + 1;	221	buf += SvCUR (sv) + 1;
202	req->result--;
203	}	222	}
204		223
205	rv = sv_2mortal (newRV_noinc ((SV *)av));	224	rv = sv_2mortal (newRV_noinc ((SV *)av));
206	}	225	}
207		226
208	XPUSHs (rv);	227	PUSHs (rv);
209	}	228	}
210	else	229	break;
		230
		231	case EIO_OPEN:
211	{	232	{
212	XPUSHs (sv_2mortal (newSViv (req->result)));	233	/* convert fd to fh */
		234	SV *fh = &PL_sv_undef;
213		235
214	if (req->type == REQ_OPEN)	236	if (req->result >= 0)
215	{	237	{
216	/* convert fd to fh */	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);
		245
		246	symlen = snprintf (
		247	sym,
		248	sizeof (sym),
		249	"%s&=%d",
		250	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		251	req->result
217	SV *fh;	252	);
218		253
219	PUTBACK;	254	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
220	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	255	fh = (SV *)gv;
221	SPAGAIN;
222
223	fh = SvREFCNT_inc (POPs);
224
225	PUSHMARK (SP);
226	XPUSHs (sv_2mortal (fh));
227	}	256	}
		257
		258	PUSHs (fh);
228	}	259	}
229
230	if (SvOK (req->callback))
231	{
232	PUTBACK;
233	call_sv (req->callback, G_VOID | G_EVAL);
234	SPAGAIN;
235
236	if (SvTRUE (ERRSV))
237	{
238	free_req (req);
239	croak (0);
240	}
241	}
242
243	LEAVE;
244
245	errno = errorno;
246	count++;
247	}
248
249	free_req (req);
250	}
251
252	return count;
253	}
254
255	static void *aio_proc(void *arg);
256
257	static void
258	start_thread (void)
259	{
260	sigset_t fullsigset, oldsigset;
261	pthread_t tid;
262	pthread_attr_t attr;
263
264	pthread_attr_init (&attr);
265	pthread_attr_setstacksize (&attr, STACKSIZE);
266	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
267
268	sigfillset (&fullsigset);
269	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
270
271	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
272	started++;
273
274	sigprocmask (SIG_SETMASK, &oldsigset, 0);
275	}
276
277	static void
278	send_req (aio_req req)
279	{
280	while (started < wanted && nreqs >= started)
281	start_thread ();
282
283	nreqs++;
284
285	pthread_mutex_lock (&reqlock);
286
287	req->next = 0;
288
289	if (reqe)
290	{
291	reqe->next = req;
292	reqe = req;
293	}
294	else
295	reqe = reqs = req;
296
297	pthread_cond_signal (&reqwait);
298	pthread_mutex_unlock (&reqlock);
299
300	if (nreqs > max_outstanding)
301	for (;;)
302	{
303	poll_cb ();
304
305	if (nreqs <= max_outstanding)
306	break;
307
308	poll_wait ();
309	}
310	}
311
312	static void
313	end_thread (void)
314	{
315	aio_req req;
316	Newz (0, req, 1, aio_cb);
317	req->type = REQ_QUIT;
318
319	send_req (req);
320	}
321
322	static void min_parallel (int nthreads)
323	{
324	if (wanted < nthreads)
325	wanted = nthreads;
326	}
327
328	static void max_parallel (int nthreads)
329	{
330	int cur = started;
331
332	if (wanted > nthreads)
333	wanted = nthreads;
334
335	while (cur > wanted)
336	{
337	end_thread ();
338	cur--;
339	}
340
341	while (started > wanted)
342	{
343	poll_wait ();
344	poll_cb ();
345	}
346	}
347
348	static void create_pipe ()
349	{
350	if (pipe (respipe))
351	croak ("unable to initialize result pipe");
352
353	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
354	croak ("cannot set result pipe to nonblocking mode");
355
356	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
357	croak ("cannot set result pipe to nonblocking mode");
358	}
359
360	/*****************************************************************************/
361	/* work around various missing functions */
362
363	#if !HAVE_PREADWRITE
364	# define pread aio_pread
365	# define pwrite aio_pwrite
366
367	/*
368	* make our pread/pwrite safe against themselves, but not against
369	* normal read/write by using a mutex. slows down execution a lot,
370	* but that's your problem, not mine.
371	*/
372	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
373
374	static ssize_t
375	pread (int fd, void *buf, size_t count, off_t offset)
376	{
377	ssize_t res;
378	off_t ooffset;
379
380	pthread_mutex_lock (&preadwritelock);
381	ooffset = lseek (fd, 0, SEEK_CUR);
382	lseek (fd, offset, SEEK_SET);
383	res = read (fd, buf, count);
384	lseek (fd, ooffset, SEEK_SET);
385	pthread_mutex_unlock (&preadwritelock);
386
387	return res;
388	}
389
390	static ssize_t
391	pwrite (int fd, void *buf, size_t count, off_t offset)
392	{
393	ssize_t res;
394	off_t ooffset;
395
396	pthread_mutex_lock (&preadwritelock);
397	ooffset = lseek (fd, 0, SEEK_CUR);
398	lseek (fd, offset, SEEK_SET);
399	res = write (fd, buf, count);
400	lseek (fd, offset, SEEK_SET);
401	pthread_mutex_unlock (&preadwritelock);
402
403	return res;
404	}
405	#endif
406
407	#if !HAVE_FDATASYNC
408	# define fdatasync fsync
409	#endif
410
411	#if !HAVE_READAHEAD
412	# define readahead aio_readahead
413
414	static ssize_t
415	readahead (int fd, off_t offset, size_t count)
416	{
417	char readahead_buf[4096];
418
419	while (count > 0)
420	{
421	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
422
423	pread (fd, readahead_buf, len, offset);
424	offset += len;
425	count -= len;
426	}
427
428	errno = 0;
429	}
430	#endif
431
432	#if !HAVE_READDIR_R
433	# define readdir_r aio_readdir_r
434
435	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
436
437	static int
438	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
439	{
440	struct dirent *e;
441	int errorno;
442
443	pthread_mutex_lock (&readdirlock);
444
445	e = readdir (dirp);
446	errorno = errno;
447
448	if (e)
449	{
450	*res = ent;
451	strcpy (ent->d_name, e->d_name);
452	}
453	else
454	*res = 0;
455
456	pthread_mutex_unlock (&readdirlock);
457
458	errno = errorno;
459	return e ? 0 : -1;
460	}
461	#endif
462
463	/* sendfile always needs emulation */
464	static ssize_t
465	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
466	{
467	ssize_t res;
468
469	if (!count)
470	return 0;
471
472	#if HAVE_SENDFILE
473	# if __linux
474	res = sendfile (ofd, ifd, &offset, count);
475
476	# elif __freebsd
477	/*
478	* Of course, the freebsd sendfile is a dire hack with no thoughts
479	* wasted on making it similar to other I/O functions.
480	*/
481	{
482	off_t sbytes;
483	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
484
485	if (res < 0 && sbytes)
486	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
487	res = sbytes;
488	}
489
490	# elif __hpux
491	res = sendfile (ofd, ifd, offset, count, 0, 0);
492
493	# elif __solaris
494	{
495	struct sendfilevec vec;
496	size_t sbytes;
497
498	vec.sfv_fd = ifd;
499	vec.sfv_flag = 0;
500	vec.sfv_off = offset;
501	vec.sfv_len = count;
502
503	res = sendfilev (ofd, &vec, 1, &sbytes);
504
505	if (res < 0 && sbytes)
506	res = sbytes;
507	}
508
509	# endif
510	#else
511	res = -1;
512	errno = ENOSYS;
513	#endif
514
515	if (res < 0
516	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
517	#if __solaris
518	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
519	#endif
520	)
521	)
522	{
523	/* emulate sendfile. this is a major pain in the ass */
524	char buf[4096];
525	res = 0;
526
527	while (count)
528	{
529	ssize_t cnt;
530
531	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
532
533	if (cnt <= 0)
534	{
535	if (cnt && !res) res = -1;
536	break;
537	}
538
539	cnt = write (ofd, buf, cnt);
540
541	if (cnt <= 0)
542	{
543	if (cnt && !res) res = -1;
544	break;
545	}
546
547	offset += cnt;
548	res += cnt;
549	count -= cnt;
550	}
551	}
552
553	return res;
554	}
555
556	/* read a full directory */
557	static int
558	scandir_ (const char *path, void **namesp)
559	{
560	DIR *dirp = opendir (path);
561	union
562	{
563	struct dirent d;
564	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
565	} u;
566	struct dirent *entp;
567	char *name, *names;
568	int memlen = 4096;
569	int memofs = 0;
570	int res = 0;
571	int errorno;
572
573	if (!dirp)
574	return -1;
575
576	names = malloc (memlen);
577
578	for (;;)
579	{
580	errno = 0, readdir_r (dirp, &u.d, &entp);
581
582	if (!entp)
583	break;
584
585	name = entp->d_name;
586
587	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
588	{
589	int len = strlen (name) + 1;
590
591	res++;
592
593	while (memofs + len > memlen)
594	{
595	memlen *= 2;
596	names = realloc (names, memlen);
597	if (!names)
598	break;
599	}
600
601	memcpy (names + memofs, name, len);
602	memofs += len;
603	}
604	}
605
606	errorno = errno;
607	closedir (dirp);
608
609	if (errorno)
610	{
611	free (names);
612	errno = errorno;
613	res = -1;
614	}
615
616	*namesp = (void *)names;
617	return res;
618	}
619
620	/*****************************************************************************/
621
622	static void *
623	aio_proc (void *thr_arg)
624	{
625	aio_req req;
626	int type;
627
628	do
629	{
630	pthread_mutex_lock (&reqlock);
631
632	for (;;)
633	{
634	req = reqs;
635
636	if (reqs)
637	{
638	reqs = reqs->next;
639	if (!reqs) reqe = 0;
640	}
641
642	if (req)
643	break;	260	break;
644		261
645	pthread_cond_wait (&reqwait, &reqlock);	262	case EIO_GROUP:
646	}	263	req->int1 = 2; /* mark group as finished */
647		264
648	pthread_mutex_unlock (&reqlock);	265	if (req->sv1)
649
650	errno = 0; /* strictly unnecessary */
651
652	type = req->type;
653
654	switch (type)
655	{	266	{
656	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	267	int i;
657	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	268	AV *av = (AV *)req->sv1;
658		269
659	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	270	EXTEND (SP, AvFILL (av) + 1);
660	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	271	for (i = 0; i <= AvFILL (av); ++i)
661		272	PUSHs (*av_fetch (av, i, 0));
662	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	273	}
663	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
664	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
665
666	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
667	case REQ_CLOSE: req->result = close (req->fd); break;
668	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
669	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
670	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
671
672	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
673	case REQ_FSYNC: req->result = fsync (req->fd); break;
674	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
675
676	case REQ_QUIT:
677	break;	274	break;
678		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
679	default:	309	default:
680	req->result = ENOSYS;	310	PUSHs (sv_2mortal (newSViv (req->result)));
681	break;	311	break;
682	}	312	}
683		313
684	req->errorno = errno;	314	errno = req->errorno;
685		315
686	pthread_mutex_lock (&reslock);	316	PUTBACK;
		317	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		318	SPAGAIN;
687		319
688	req->next = 0;	320	FREETMPS;
		321	LEAVE;
689		322
690	if (rese)	323	PUTBACK;
691	{
692	rese->next = req;
693	rese = req;
694	}
695	else
696	{
697	rese = ress = req;
698
699	/* write a dummy byte to the pipe so fh becomes ready */
700	write (respipe [1], &respipe, 1);
701	}
702
703	pthread_mutex_unlock (&reslock);
704	}	324	}
705	while (type != REQ_QUIT);
706		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)
707	return 0;	349	return;
708	}
709		350
710	/*****************************************************************************/	351	SvREFCNT_dec (grp->sv2);
		352	grp->sv2 = 0;
711		353
712	static void atfork_prepare (void)	354	eio_grp_cancel (grp);
713	{	355	}
714	pthread_mutex_lock (&reqlock);	356
715	pthread_mutex_lock (&reslock);	357	#ifdef USE_SOCKETS_AS_HANDLES
716	#if !HAVE_PREADWRITE	358	# define TO_SOCKET(x) (win32_get_osfhandle (x))
717	pthread_mutex_lock (&preadwritelock);	359	#else
		360	# define TO_SOCKET(x) (x)
718	#endif	361	#endif
719	#if !HAVE_READDIR_R	362
720	pthread_mutex_lock (&readdirlock);	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))
721	#endif	375	#endif
722	}	376	croak ("unable to initialize result pipe");
723		377
724	static void atfork_parent (void)	378	if (old_readfd >= 0)
725	{	379	{
726	#if !HAVE_READDIR_R	380	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
727	pthread_mutex_unlock (&readdirlock);	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))
728	#endif	394	#endif
729	#if !HAVE_PREADWRITE	395	croak ("unable to initialize result pipe(3)");
730	pthread_mutex_unlock (&preadwritelock);	396
731	#endif	397	respipe_osf [0] = TO_SOCKET (respipe [0]);
732	pthread_mutex_unlock (&reslock);	398	respipe_osf [1] = TO_SOCKET (respipe [1]);
733	pthread_mutex_unlock (&reqlock);	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
		438	return res;
734	}	439	}
735		440
736	static void atfork_child (void)	441	static void atfork_child (void)
737	{	442	{
738	aio_req prv;
739
740	started = 0;
741
742	while (reqs)
743	{
744	prv = reqs;
745	reqs = prv->next;
746	free_req (prv);
747	}
748
749	reqs = reqe = 0;
750
751	while (ress)
752	{
753	prv = ress;
754	ress = prv->next;
755	free_req (prv);
756	}
757
758	ress = rese = 0;
759
760	close (respipe [0]);
761	close (respipe [1]);
762	create_pipe ();	443	create_respipe ();
763
764	atfork_parent ();
765	}	444	}
766		445
767	#define dREQ \	446	#define dREQ \
768	aio_req req; \	447	aio_req req; \
		448	int req_pri = next_pri; \
		449	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
769	\	450	\
770	if (SvOK (callback) && !SvROK (callback)) \	451	if (SvOK (callback) && !SvROK (callback)) \
771	croak ("clalback must be undef or of reference type"); \	452	croak ("callback must be undef or of reference type"); \
772	\	453	\
773	Newz (0, req, 1, aio_cb); \	454	Newz (0, req, 1, eio_req); \
774	if (!req) \	455	if (!req) \
775	croak ("out of memory during aio_req allocation"); \	456	croak ("out of memory during eio_req allocation"); \
776	\	457	\
777	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));
778		466
779	MODULE = IO::AIO PACKAGE = IO::AIO	467	MODULE = IO::AIO PACKAGE = IO::AIO
780		468
781	PROTOTYPES: ENABLE	469	PROTOTYPES: ENABLE
782		470
783	BOOT:	471	BOOT:
784	{	472	{
785	create_pipe ();	473	stash = gv_stashpv ("IO::AIO", 1);
786	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
787	}
788		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
789	void	502	void
790	min_parallel(nthreads)	503	max_poll_reqs (int nreqs)
791	int nthreads
792	PROTOTYPE: $	504	PROTOTYPE: $
		505	CODE:
		506	eio_set_max_poll_reqs (nreqs);
793		507
794	void	508	void
795	max_parallel(nthreads)	509	max_poll_time (double nseconds)
796	int nthreads
797	PROTOTYPE: $	510	PROTOTYPE: $
798
799	int
800	max_outstanding(nreqs)
801	int nreqs
802	PROTOTYPE: $
803	CODE:	511	CODE:
804	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:
805	max_outstanding = nreqs;	536	max_outstanding = maxreqs;
806		537
807	void	538	void
808	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	539	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
809	SV * pathname
810	int flags
811	int mode
812	SV * callback
813	PROTOTYPE: $$$;$	540	PROTOTYPE: $$$;$
814	CODE:	541	PPCODE:
815	{	542	{
816	dREQ;	543	dREQ;
817		544
818	req->type = REQ_OPEN;	545	req->type = EIO_OPEN;
819	req->data = newSVsv (pathname);	546	req->sv1 = newSVsv (pathname);
820	req->dataptr = SvPVbyte_nolen (req->data);	547	req->ptr1 = SvPVbyte_nolen (req->sv1);
821	req->fd = flags;	548	req->int1 = flags;
822	req->mode = mode;	549	req->int2 = mode;
823		550
824	send_req (req);	551	REQ_SEND;
825	}	552	}
826		553
827	void	554	void
828	aio_close(fh,callback=&PL_sv_undef)	555	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
829	SV * fh
830	SV * callback
831	PROTOTYPE: $;$	556	PROTOTYPE: $;$
832	ALIAS:	557	ALIAS:
833	aio_close = REQ_CLOSE
834	aio_fsync = REQ_FSYNC	558	aio_fsync = EIO_FSYNC
835	aio_fdatasync = REQ_FDATASYNC	559	aio_fdatasync = EIO_FDATASYNC
836	CODE:	560	PPCODE:
837	{	561	{
838	dREQ;	562	dREQ;
839		563
840	req->type = ix;	564	req->type = ix;
841	req->fh = newSVsv (fh);	565	req->sv1 = newSVsv (fh);
842	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	566	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
843		567
844	send_req (req);	568	REQ_SEND (req);
845	}	569	}
846		570
847	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
848	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)
849	SV * fh
850	UV offset
851	UV length
852	SV * data
853	UV dataoffset
854	SV * callback
855	ALIAS:	601	ALIAS:
856	aio_read = REQ_READ	602	aio_read = EIO_READ
857	aio_write = REQ_WRITE	603	aio_write = EIO_WRITE
858	PROTOTYPE: $$$$$;$	604	PROTOTYPE: $$$$$;$
859	CODE:	605	PPCODE:
860	{	606	{
861	aio_req req;
862	STRLEN svlen;	607	STRLEN svlen;
863	char *svptr = SvPVbyte (data, svlen);	608	char *svptr = SvPVbyte (data, svlen);
		609	UV len = SvUV (length);
864		610
865	SvUPGRADE (data, SVt_PV);	611	SvUPGRADE (data, SVt_PV);
866	SvPOK_on (data);	612	SvPOK_on (data);
867		613
868	if (dataoffset < 0)	614	if (dataoffset < 0)
869	dataoffset += svlen;	615	dataoffset += svlen;
870		616
871	if (dataoffset < 0 || dataoffset > svlen)	617	if (dataoffset < 0 || dataoffset > svlen)
872	croak ("data offset outside of string");	618	croak ("dataoffset outside of data scalar");
873		619
874	if (ix == REQ_WRITE)	620	if (ix == EIO_WRITE)
875	{	621	{
876	/* write: check length and adjust. */	622	/* write: check length and adjust. */
877	if (length < 0 || length + dataoffset > svlen)	623	if (!SvOK (length) || len + dataoffset > svlen)
878	length = svlen - dataoffset;	624	len = svlen - dataoffset;
879	}	625	}
880	else	626	else
881	{	627	{
882	/* read: grow scalar as necessary */	628	/* read: grow scalar as necessary */
883	svptr = SvGROW (data, length + dataoffset);	629	svptr = SvGROW (data, len + dataoffset + 1);
884	}	630	}
885		631
886	if (length < 0)	632	if (len < 0)
887	croak ("length must not be negative");	633	croak ("length must not be negative");
888		634
889	{	635	{
890	dREQ;	636	dREQ;
891		637
892	req->type = ix;	638	req->type = ix;
893	req->fh = newSVsv (fh);	639	req->sv1 = newSVsv (fh);
894	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	640	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
895	: IoOFP (sv_2io (fh)));	641	: IoOFP (sv_2io (fh)));
		642	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
896	req->offset = offset;	643	req->size = len;
897	req->length = length;
898	req->data = SvREFCNT_inc (data);	644	req->sv2 = SvREFCNT_inc (data);
899	req->dataptr = (char *)svptr + dataoffset;	645	req->ptr2 = (char *)svptr + dataoffset;
		646	req->stroffset = dataoffset;
900		647
901	if (!SvREADONLY (data))	648	if (!SvREADONLY (data))
902	{	649	{
903	SvREADONLY_on (data);	650	SvREADONLY_on (data);
904	req->data2ptr = (void *)data;	651	req->flags |= FLAG_SV2_RO_OFF;
905	}	652	}
906		653
907	send_req (req);	654	REQ_SEND;
908	}	655	}
909	}	656	}
910		657
911	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
912	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)
913	SV * out_fh
914	SV * in_fh
915	UV in_offset
916	UV length
917	SV * callback
918	PROTOTYPE: $$$$;$	680	PROTOTYPE: $$$$;$
919	CODE:	681	PPCODE:
920	{	682	{
921	dREQ;	683	dREQ;
922		684
923	req->type = REQ_SENDFILE;	685	req->type = EIO_SENDFILE;
924	req->fh = newSVsv (out_fh);	686	req->sv1 = newSVsv (out_fh);
925	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	687	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
926	req->fh2 = newSVsv (in_fh);	688	req->sv2 = newSVsv (in_fh);
927	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	689	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
928	req->offset = in_offset;	690	req->offs = SvVAL64 (in_offset);
929	req->length = length;	691	req->size = length;
930		692
931	send_req (req);	693	REQ_SEND;
932	}	694	}
933		695
934	void	696	void
935	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	697	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
936	SV * fh
937	UV offset
938	IV length
939	SV * callback
940	PROTOTYPE: $$$;$	698	PROTOTYPE: $$$;$
941	CODE:	699	PPCODE:
942	{	700	{
943	dREQ;	701	dREQ;
944		702
945	req->type = REQ_READAHEAD;	703	req->type = EIO_READAHEAD;
946	req->fh = newSVsv (fh);	704	req->sv1 = newSVsv (fh);
947	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	705	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
948	req->offset = offset;	706	req->offs = SvVAL64 (offset);
949	req->length = length;	707	req->size = length;
950		708
951	send_req (req);	709	REQ_SEND;
952	}	710	}
953		711
954	void	712	void
955	aio_stat(fh_or_path,callback=&PL_sv_undef)	713	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
956	SV * fh_or_path
957	SV * callback
958	ALIAS:	714	ALIAS:
959	aio_stat = REQ_STAT	715	aio_stat = EIO_STAT
960	aio_lstat = REQ_LSTAT	716	aio_lstat = EIO_LSTAT
961	CODE:	717	PPCODE:
962	{	718	{
963	dREQ;	719	dREQ;
964		720
965	New (0, req->statdata, 1, Stat_t);	721	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
966	if (!req->statdata)	722	if (!req->ptr2)
967	{	723	{
968	free_req (req);	724	req_destroy (req);
969	croak ("out of memory during aio_req->statdata allocation");	725	croak ("out of memory during aio_stat statdata allocation");
970	}	726	}
		727
		728	req->flags |= EIO_FLAG_PTR2_FREE;
		729	req->sv1 = newSVsv (fh_or_path);
971		730
972	if (SvPOK (fh_or_path))	731	if (SvPOK (fh_or_path))
973	{	732	{
974	req->type = ix;	733	req->type = ix;
975	req->data = newSVsv (fh_or_path);
976	req->dataptr = SvPVbyte_nolen (req->data);	734	req->ptr1 = SvPVbyte_nolen (req->sv1);
977	}	735	}
978	else	736	else
979	{	737	{
980	req->type = REQ_FSTAT;	738	req->type = EIO_FSTAT;
981	req->fh = newSVsv (fh_or_path);
982	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))
983	}	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	}
984		765
985	send_req (req);	766	REQ_SEND;
986	}	767	}
987		768
988	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
989	aio_unlink(pathname,callback=&PL_sv_undef)	839	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
990	SV * pathname
991	SV * callback
992	ALIAS:	840	ALIAS:
993	aio_unlink = REQ_UNLINK	841	aio_unlink = EIO_UNLINK
994	aio_rmdir = REQ_RMDIR	842	aio_rmdir = EIO_RMDIR
		843	aio_readdir = EIO_READDIR
995	CODE:	844	PPCODE:
996	{	845	{
997	dREQ;	846	dREQ;
998		847
999	req->type = ix;	848	req->type = ix;
1000	req->data = newSVsv (pathname);	849	req->sv1 = newSVsv (pathname);
1001	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;
1002		864
1003	send_req (req);	865	req->type = ix;
1004	}	866	req->sv1 = newSVsv (oldpath);
1005		867	req->ptr1 = SvPVbyte_nolen (req->sv1);
1006	void	868	req->sv2 = newSVsv (newpath);
1007	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	869	req->ptr2 = SvPVbyte_nolen (req->sv2);
1008	SV * oldpath
1009	SV * newpath
1010	SV * callback
1011	CODE:
1012	{
1013	dREQ;
1014		870
1015	req->type = REQ_SYMLINK;	871	REQ_SEND;
1016	req->fh = newSVsv (oldpath);	872	}
1017	req->data2ptr = SvPVbyte_nolen (req->fh);	873
1018	req->data = newSVsv (newpath);	874	void
1019	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;
1020		879
1021	send_req (req);	880	req->type = EIO_MKNOD;
1022	}	881	req->sv1 = newSVsv (pathname);
1023		882	req->ptr1 = SvPVbyte_nolen (req->sv1);
1024	void	883	req->int2 = (mode_t)mode;
1025	aio_readdir(pathname,callback=&PL_sv_undef)	884	req->offs = dev;
1026	SV * pathname
1027	SV * callback
1028	CODE:
1029	{
1030	dREQ;
1031		885
		886	REQ_SEND;
		887	}
		888
		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
1032	req->type = REQ_READDIR;	923	req->type = ix;
1033	req->data = newSVsv (pathname);
1034	req->dataptr = SvPVbyte_nolen (req->data);
1035
1036	send_req (req);
1037	}
1038		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
1039	void	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
1040	flush()	951	flush ()
1041	PROTOTYPE:	952	PROTOTYPE:
1042	CODE:	953	CODE:
1043	while (nreqs)	954	while (eio_nreqs ())
1044	{	955	{
1045	poll_wait ();	956	poll_wait ();
1046	poll_cb ();	957	poll_cb ();
1047	}	958	}
1048		959
1049	void	960	int
1050	poll()	961	poll()
1051	PROTOTYPE:	962	PROTOTYPE:
1052	CODE:	963	CODE:
1053	if (nreqs)
1054	{
1055	poll_wait ();	964	poll_wait ();
1056	poll_cb ();	965	RETVAL = poll_cb ();
1057	}	966	OUTPUT:
		967	RETVAL
1058		968
1059	int	969	int
1060	poll_fileno()	970	poll_fileno()
1061	PROTOTYPE:	971	PROTOTYPE:
1062	CODE:	972	CODE:
…		…
1074		984
1075	void	985	void
1076	poll_wait()	986	poll_wait()
1077	PROTOTYPE:	987	PROTOTYPE:
1078	CODE:	988	CODE:
1079	if (nreqs)
1080	poll_wait ();	989	poll_wait ();
1081		990
1082	int	991	int
1083	nreqs()	992	nreqs()
1084	PROTOTYPE:	993	PROTOTYPE:
1085	CODE:	994	CODE:
1086	RETVAL = nreqs;	995	RETVAL = eio_nreqs ();
1087	OUTPUT:	996	OUTPUT:
1088	RETVAL	997	RETVAL
1089		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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