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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.42 by root, Fri Jul 21 07:35:31 2006 UTC vs.
Revision 1.116 by root, Sat May 10 19:25:33 2008 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"
9
10	#include <pthread.h>
11
12	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
13	#include <errno.h>	11	#include <errno.h>
14	#include <sys/types.h>	12	#include <sys/types.h>
15	#include <sys/stat.h>	13	#include <sys/stat.h>
16	#include <limits.h>	14	#include <limits.h>
17	#include <unistd.h>
18	#include <fcntl.h>	15	#include <fcntl.h>
19	#include <signal.h>
20	#include <sched.h>	16	#include <sched.h>
21		17
22	#if HAVE_SENDFILE	18	#ifdef _WIN32
23	# if __linux	19
24	# include <sys/sendfile.h>	20	# define EIO_STRUCT_DIRENT Direntry_t
25	# elif __freebsd	21	# undef malloc
26	# include <sys/socket.h>	22	# undef free
27	# include <sys/uio.h>	23
28	# elif __hpux	24	// perl overrides all those nice win32 functions
29	# include <sys/socket.h>	25	# undef open
30	# elif __solaris /* not yet */	26	# undef read
31	# 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
32	# else	56	#else
33	# error sendfile support requested but not available	57
34	# 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
35	#endif	65	#endif
36		66
37	/* used for struct dirent, AIX doesn't provide it */	67	#define EIO_STRUCT_STAT Stat_t
38	#ifndef NAME_MAX	68
39	# 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
40	#endif	74	#endif
41		75
42	#if __ia64	76	static HV *stash;
43	# define STACKSIZE 65536	77	typedef SV SV8; /* byte-sv, used for argument-checking */
44	#else	78
45	# define STACKSIZE 8192	79	#define AIO_REQ_KLASS "IO::AIO::REQ"
46	#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)
47		96
48	enum {	97	enum {
49	REQ_QUIT,	98	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
50	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,
52	REQ_SENDFILE,
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,
58	};	99	};
59		100
60	typedef struct aio_cb {	101	#include "libeio/eio.c"
61	struct aio_cb *volatile next;
62		102
63	int type;
64
65	/* should receive a cleanup, with unions */
66	int fd, fd2;
67	off_t offset;
68	size_t length;
69	ssize_t result;
70	mode_t mode; /* open */
71	int errorno;
72	SV *data, *callback;
73	SV *fh, *fh2;
74	void *dataptr, *data2ptr;
75	STRLEN dataoffset;
76
77	Stat_t *statdata;
78	} aio_cb;
79
80	typedef aio_cb *aio_req;	103	typedef eio_req *aio_req;
		104	typedef eio_req *aio_req_ornot;
81		105
82	static int started, wanted;
83	static volatile int nreqs;
84	static int max_outstanding = 1<<30;	106	static int max_outstanding = 0;
85	static int respipe [2];
86		107
87	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	108	static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
88	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
89	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
90		109
91	static volatile aio_req reqs, reqe; /* queue start, queue end */	110	static int respipe_osf [2], respipe [2] = { -1, -1 };
92	static volatile aio_req ress, rese; /* queue start, queue end */
93		111
		112	static void req_destroy (aio_req req);
94	static void free_req (aio_req req)	113	static void req_cancel (aio_req req);
95	{
96	if (req->data)
97	SvREFCNT_dec (req->data);
98		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	{
99	if (req->fh)	132	if (!req->self)
100	SvREFCNT_dec (req->fh);
101
102	if (req->fh2)
103	SvREFCNT_dec (req->fh2);
104
105	if (req->statdata)
106	Safefree (req->statdata);
107
108	if (req->callback)
109	SvREFCNT_dec (req->callback);
110
111	if (req->type == REQ_READDIR && req->result >= 0)
112	free (req->data2ptr);
113
114	Safefree (req);
115	}
116
117	static void
118	poll_wait ()
119	{
120	if (nreqs && !ress)
121	{	133	{
122	fd_set rfd;	134	req->self = (SV *)newHV ();
123	FD_ZERO(&rfd);	135	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
124	FD_SET(respipe [0], &rfd);
125
126	select (respipe [0] + 1, &rfd, 0, 0, 0);
127	}	136	}
128	}
129		137
130	static int	138	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
131	poll_cb ()	139	}
		140
		141	static aio_req SvAIO_REQ (SV *sv)
		142	{
		143	MAGIC *mg;
		144
		145	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		146	croak ("object of class " AIO_REQ_KLASS " expected");
		147
		148	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		149
		150	return mg ? (aio_req)mg->mg_ptr : 0;
		151	}
		152
		153	static void aio_grp_feed (aio_req grp)
		154	{
		155	if (grp->sv2 && SvOK (grp->sv2))
		156	{
		157	dSP;
		158
		159	ENTER;
		160	SAVETMPS;
		161	PUSHMARK (SP);
		162	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		163	PUTBACK;
		164	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		165	SPAGAIN;
		166	FREETMPS;
		167	LEAVE;
		168	}
		169	}
		170
		171	static int req_invoke (eio_req *req)
132	{	172	{
133	dSP;	173	dSP;
134	int count = 0;
135	int do_croak = 0;
136	aio_req req;
137		174
138	for (;;)	175	if (req->flags & FLAG_SV2_RO_OFF)
		176	SvREADONLY_off (req->sv2);
		177
		178	if (!EIO_CANCELLED (req) && SvOK (req->callback))
139	{	179	{
140	pthread_mutex_lock (&reslock);	180	ENTER;
141	req = ress;	181	SAVETMPS;
		182	PUSHMARK (SP);
		183	EXTEND (SP, 1);
142		184
143	if (req)	185	switch (req->type)
144	{	186	{
145	ress = req->next;	187	case EIO_READDIR:
146
147	if (!ress)
148	{
149	/* read any signals sent by the worker threads */
150	char buf [32];
151	while (read (respipe [0], buf, 32) == 32)
152	;
153
154	rese = 0;
155	}
156	}
157
158	pthread_mutex_unlock (&reslock);
159
160	if (!req)
161	break;
162
163	nreqs--;
164
165	if (req->type == REQ_QUIT)
166	started--;
167	else
168	{
169	int errorno = errno;
170	errno = req->errorno;
171
172	if (req->type == REQ_READ)
173	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
174
175	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
176	SvREADONLY_off (req->data);
177
178	if (req->statdata)
179	{
180	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
181	PL_laststatval = req->result;
182	PL_statcache = *(req->statdata);
183	}
184
185	ENTER;
186	PUSHMARK (SP);
187
188	if (req->type == REQ_READDIR)
189	{	188	{
190	SV *rv = &PL_sv_undef;	189	SV *rv = &PL_sv_undef;
191		190
192	if (req->result >= 0)	191	if (req->result >= 0)
193	{	192	{
		193	int i;
194	char *buf = req->data2ptr;	194	char *buf = req->ptr2;
195	AV *av = newAV ();	195	AV *av = newAV ();
196		196
197	while (req->result)	197	av_extend (av, req->result - 1);
		198
		199	for (i = 0; i < req->result; ++i)
198	{	200	{
199	SV *sv = newSVpv (buf, 0);	201	SV *sv = newSVpv (buf, 0);
200		202
201	av_push (av, sv);	203	av_store (av, i, sv);
202	buf += SvCUR (sv) + 1;	204	buf += SvCUR (sv) + 1;
203	req->result--;
204	}	205	}
205		206
206	rv = sv_2mortal (newRV_noinc ((SV *)av));	207	rv = sv_2mortal (newRV_noinc ((SV *)av));
207	}	208	}
208		209
209	XPUSHs (rv);	210	PUSHs (rv);
210	}	211	}
211	else	212	break;
		213
		214	case EIO_OPEN:
212	{	215	{
213	XPUSHs (sv_2mortal (newSViv (req->result)));	216	/* convert fd to fh */
		217	SV *fh = &PL_sv_undef;
214		218
215	if (req->type == REQ_OPEN)	219	if (req->result >= 0)
216	{	220	{
217	/* convert fd to fh */	221	GV *gv = (GV *)sv_newmortal ();
		222	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		223	char sym [64];
		224	int symlen;
		225
		226	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		227	gv_init (gv, stash, sym, symlen, 0);
		228
		229	symlen = snprintf (
		230	sym,
		231	sizeof (sym),
		232	"%s&=%d",
		233	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		234	req->result
218	SV *fh;	235	);
219		236
220	PUTBACK;	237	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
221	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	238	fh = (SV *)gv;
222	SPAGAIN;
223
224	fh = SvREFCNT_inc (POPs);
225
226	PUSHMARK (SP);
227	XPUSHs (sv_2mortal (fh));
228	}	239	}
		240
		241	PUSHs (fh);
229	}	242	}
230
231	if (SvOK (req->callback))
232	{
233	PUTBACK;
234	call_sv (req->callback, G_VOID | G_EVAL);
235	SPAGAIN;
236
237	if (SvTRUE (ERRSV))
238	{
239	free_req (req);
240	croak (0);
241	}
242	}
243
244	LEAVE;
245
246	errno = errorno;
247	count++;
248	}
249
250	free_req (req);
251	}
252
253	return count;
254	}
255
256	static void *aio_proc(void *arg);
257
258	static void
259	start_thread (void)
260	{
261	sigset_t fullsigset, oldsigset;
262	pthread_t tid;
263	pthread_attr_t attr;
264
265	pthread_attr_init (&attr);
266	pthread_attr_setstacksize (&attr, STACKSIZE);
267	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
268
269	sigfillset (&fullsigset);
270	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
271
272	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
273	started++;
274
275	sigprocmask (SIG_SETMASK, &oldsigset, 0);
276	}
277
278	static void
279	send_req (aio_req req)
280	{
281	while (started < wanted && nreqs >= started)
282	start_thread ();
283
284	nreqs++;
285
286	pthread_mutex_lock (&reqlock);
287
288	req->next = 0;
289
290	if (reqe)
291	{
292	reqe->next = req;
293	reqe = req;
294	}
295	else
296	reqe = reqs = req;
297
298	pthread_cond_signal (&reqwait);
299	pthread_mutex_unlock (&reqlock);
300
301	if (nreqs > max_outstanding)
302	for (;;)
303	{
304	poll_cb ();
305
306	if (nreqs <= max_outstanding)
307	break;
308
309	poll_wait ();
310	}
311	}
312
313	static void
314	end_thread (void)
315	{
316	aio_req req;
317	Newz (0, req, 1, aio_cb);
318	req->type = REQ_QUIT;
319
320	send_req (req);
321	}
322
323	static void min_parallel (int nthreads)
324	{
325	if (wanted < nthreads)
326	wanted = nthreads;
327	}
328
329	static void max_parallel (int nthreads)
330	{
331	int cur = started;
332
333	if (wanted > nthreads)
334	wanted = nthreads;
335
336	while (cur > wanted)
337	{
338	end_thread ();
339	cur--;
340	}
341
342	while (started > wanted)
343	{
344	poll_wait ();
345	poll_cb ();
346	}
347	}
348
349	static void create_pipe ()
350	{
351	if (pipe (respipe))
352	croak ("unable to initialize result pipe");
353
354	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
355	croak ("cannot set result pipe to nonblocking mode");
356
357	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
358	croak ("cannot set result pipe to nonblocking mode");
359	}
360
361	/*****************************************************************************/
362	/* work around various missing functions */
363
364	#if !HAVE_PREADWRITE
365	# define pread aio_pread
366	# define pwrite aio_pwrite
367
368	/*
369	* make our pread/pwrite safe against themselves, but not against
370	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.
372	*/
373	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
374
375	static ssize_t
376	pread (int fd, void *buf, size_t count, off_t offset)
377	{
378	ssize_t res;
379	off_t ooffset;
380
381	pthread_mutex_lock (&preadwritelock);
382	ooffset = lseek (fd, 0, SEEK_CUR);
383	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&preadwritelock);
387
388	return res;
389	}
390
391	static ssize_t
392	pwrite (int fd, void *buf, size_t count, off_t offset)
393	{
394	ssize_t res;
395	off_t ooffset;
396
397	pthread_mutex_lock (&preadwritelock);
398	ooffset = lseek (fd, 0, SEEK_CUR);
399	lseek (fd, offset, SEEK_SET);
400	res = write (fd, buf, count);
401	lseek (fd, offset, SEEK_SET);
402	pthread_mutex_unlock (&preadwritelock);
403
404	return res;
405	}
406	#endif
407
408	#if !HAVE_FDATASYNC
409	# define fdatasync fsync
410	#endif
411
412	#if !HAVE_READAHEAD
413	# define readahead aio_readahead
414
415	static ssize_t
416	readahead (int fd, off_t offset, size_t count)
417	{
418	char readahead_buf[4096];
419
420	while (count > 0)
421	{
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
423
424	pread (fd, readahead_buf, len, offset);
425	offset += len;
426	count -= len;
427	}
428
429	errno = 0;
430	}
431	#endif
432
433	#if !HAVE_READDIR_R
434	# define readdir_r aio_readdir_r
435
436	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
437
438	static int
439	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
440	{
441	struct dirent *e;
442	int errorno;
443
444	pthread_mutex_lock (&readdirlock);
445
446	e = readdir (dirp);
447	errorno = errno;
448
449	if (e)
450	{
451	*res = ent;
452	strcpy (ent->d_name, e->d_name);
453	}
454	else
455	*res = 0;
456
457	pthread_mutex_unlock (&readdirlock);
458
459	errno = errorno;
460	return e ? 0 : -1;
461	}
462	#endif
463
464	/* sendfile always needs emulation */
465	static ssize_t
466	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
467	{
468	ssize_t res;
469
470	if (!count)
471	return 0;
472
473	#if HAVE_SENDFILE
474	# if __linux
475	res = sendfile (ofd, ifd, &offset, count);
476
477	# elif __freebsd
478	/*
479	* Of course, the freebsd sendfile is a dire hack with no thoughts
480	* wasted on making it similar to other I/O functions.
481	*/
482	{
483	off_t sbytes;
484	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
485
486	if (res < 0 && sbytes)
487	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
488	res = sbytes;
489	}
490
491	# elif __hpux
492	res = sendfile (ofd, ifd, offset, count, 0, 0);
493
494	# elif __solaris
495	{
496	struct sendfilevec vec;
497	size_t sbytes;
498
499	vec.sfv_fd = ifd;
500	vec.sfv_flag = 0;
501	vec.sfv_off = offset;
502	vec.sfv_len = count;
503
504	res = sendfilev (ofd, &vec, 1, &sbytes);
505
506	if (res < 0 && sbytes)
507	res = sbytes;
508	}
509
510	# endif
511	#else
512	res = -1;
513	errno = ENOSYS;
514	#endif
515
516	if (res < 0
517	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
518	#if __solaris
519	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
520	#endif
521	)
522	)
523	{
524	/* emulate sendfile. this is a major pain in the ass */
525	char buf[4096];
526	res = 0;
527
528	while (count)
529	{
530	ssize_t cnt;
531
532	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
533
534	if (cnt <= 0)
535	{
536	if (cnt && !res) res = -1;
537	break;
538	}
539
540	cnt = write (ofd, buf, cnt);
541
542	if (cnt <= 0)
543	{
544	if (cnt && !res) res = -1;
545	break;
546	}
547
548	offset += cnt;
549	res += cnt;
550	count -= cnt;
551	}
552	}
553
554	return res;
555	}
556
557	/* read a full directory */
558	static int
559	scandir_ (const char *path, void **namesp)
560	{
561	DIR *dirp = opendir (path);
562	union
563	{
564	struct dirent d;
565	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
566	} u;
567	struct dirent *entp;
568	char *name, *names;
569	int memlen = 4096;
570	int memofs = 0;
571	int res = 0;
572	int errorno;
573
574	if (!dirp)
575	return -1;
576
577	names = malloc (memlen);
578
579	for (;;)
580	{
581	errno = 0, readdir_r (dirp, &u.d, &entp);
582
583	if (!entp)
584	break;
585
586	name = entp->d_name;
587
588	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
589	{
590	int len = strlen (name) + 1;
591
592	res++;
593
594	while (memofs + len > memlen)
595	{
596	memlen *= 2;
597	names = realloc (names, memlen);
598	if (!names)
599	break;
600	}
601
602	memcpy (names + memofs, name, len);
603	memofs += len;
604	}
605	}
606
607	errorno = errno;
608	closedir (dirp);
609
610	if (errorno)
611	{
612	free (names);
613	errno = errorno;
614	res = -1;
615	}
616
617	*namesp = (void *)names;
618	return res;
619	}
620
621	/*****************************************************************************/
622
623	static void *
624	aio_proc (void *thr_arg)
625	{
626	aio_req req;
627	int type;
628
629	do
630	{
631	pthread_mutex_lock (&reqlock);
632
633	for (;;)
634	{
635	req = reqs;
636
637	if (reqs)
638	{
639	reqs = reqs->next;
640	if (!reqs) reqe = 0;
641	}
642
643	if (req)
644	break;	243	break;
645		244
646	pthread_cond_wait (&reqwait, &reqlock);	245	case EIO_GROUP:
647	}	246	req->int1 = 2; /* mark group as finished */
648		247
649	pthread_mutex_unlock (&reqlock);	248	if (req->sv1)
650
651	errno = 0; /* strictly unnecessary */
652
653	type = req->type;
654
655	switch (type)
656	{	249	{
657	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	250	int i;
658	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	251	AV *av = (AV *)req->sv1;
659		252
660	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	253	EXTEND (SP, AvFILL (av) + 1);
661	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	254	for (i = 0; i <= AvFILL (av); ++i)
662		255	PUSHs (*av_fetch (av, i, 0));
663	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	256	}
664	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
665	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
666
667	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
668	case REQ_CLOSE: req->result = close (req->fd); break;
669	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
670	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
671	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
672	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
673	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
674
675	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
676	case REQ_FSYNC: req->result = fsync (req->fd); break;
677	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
678
679	case REQ_QUIT:
680	break;	257	break;
681		258
		259	case EIO_NOP:
		260	case EIO_BUSY:
		261	break;
		262
		263	case EIO_READLINK:
		264	if (req->result > 0)
		265	{
		266	SvCUR_set (req->sv2, req->result);
		267	*SvEND (req->sv2) = 0;
		268	PUSHs (req->sv2);
		269	}
		270	break;
		271
		272	case EIO_STAT:
		273	case EIO_LSTAT:
		274	case EIO_FSTAT:
		275	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		276	PL_laststatval = req->result;
		277	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		278	PUSHs (sv_2mortal (newSViv (req->result)));
		279	break;
		280
		281	case EIO_READ:
		282	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		283	*SvEND (req->sv2) = 0;
		284	PUSHs (sv_2mortal (newSViv (req->result)));
		285	break;
		286
		287	case EIO_DUP2:
		288	if (req->result > 0)
		289	req->result = 0;
		290	/* FALLTHROUGH */
		291
682	default:	292	default:
683	req->result = ENOSYS;	293	PUSHs (sv_2mortal (newSViv (req->result)));
684	break;	294	break;
685	}	295	}
686		296
687	req->errorno = errno;	297	errno = req->errorno;
688		298
689	pthread_mutex_lock (&reslock);	299	PUTBACK;
		300	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		301	SPAGAIN;
690		302
691	req->next = 0;	303	FREETMPS;
		304	LEAVE;
692		305
693	if (rese)	306	PUTBACK;
694	{
695	rese->next = req;
696	rese = req;
697	}
698	else
699	{
700	rese = ress = req;
701
702	/* write a dummy byte to the pipe so fh becomes ready */
703	write (respipe [1], &respipe, 1);
704	}
705
706	pthread_mutex_unlock (&reslock);
707	}	307	}
708	while (type != REQ_QUIT);
709		308
		309	return !!SvTRUE (ERRSV);
		310	}
		311
		312	static void req_destroy (aio_req req)
		313	{
		314	if (req->self)
		315	{
		316	sv_unmagic (req->self, PERL_MAGIC_ext);
		317	SvREFCNT_dec (req->self);
		318	}
		319
		320	SvREFCNT_dec (req->sv1);
		321	SvREFCNT_dec (req->sv2);
		322	SvREFCNT_dec (req->callback);
		323
		324	Safefree (req);
		325	}
		326
		327	static void req_cancel_subs (aio_req grp)
		328	{
		329	aio_req sub;
		330
		331	if (grp->type != EIO_GROUP)
710	return 0;	332	return;
711	}
712		333
713	/*****************************************************************************/	334	SvREFCNT_dec (grp->sv2);
		335	grp->sv2 = 0;
714		336
715	static void atfork_prepare (void)	337	eio_grp_cancel (grp);
716	{	338	}
717	pthread_mutex_lock (&reqlock);	339
718	pthread_mutex_lock (&reslock);	340	#ifdef USE_SOCKETS_AS_HANDLES
719	#if !HAVE_PREADWRITE	341	# define TO_SOCKET(x) (win32_get_osfhandle (x))
720	pthread_mutex_lock (&preadwritelock);	342	#else
		343	# define TO_SOCKET(x) (x)
721	#endif	344	#endif
722	#if !HAVE_READDIR_R	345
723	pthread_mutex_lock (&readdirlock);	346	static void
		347	create_respipe (void)
		348	{
		349	int old_readfd = respipe [0];
		350
		351	if (respipe [1] >= 0)
		352	respipe_close (TO_SOCKET (respipe [1]));
		353
		354	#ifdef _WIN32
		355	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		356	#else
		357	if (pipe (respipe))
724	#endif	358	#endif
725	}	359	croak ("unable to initialize result pipe");
726		360
727	static void atfork_parent (void)	361	if (old_readfd >= 0)
728	{	362	{
729	#if !HAVE_READDIR_R	363	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
730	pthread_mutex_unlock (&readdirlock);	364	croak ("unable to initialize result pipe(2)");
		365
		366	respipe_close (respipe [0]);
		367	respipe [0] = old_readfd;
		368	}
		369
		370	#ifdef _WIN32
		371	int arg = 1;
		372	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		373	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		374	#else
		375	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		376	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
731	#endif	377	#endif
732	#if !HAVE_PREADWRITE	378	croak ("unable to initialize result pipe(3)");
733	pthread_mutex_unlock (&preadwritelock);	379
734	#endif	380	respipe_osf [0] = TO_SOCKET (respipe [0]);
735	pthread_mutex_unlock (&reslock);	381	respipe_osf [1] = TO_SOCKET (respipe [1]);
736	pthread_mutex_unlock (&reqlock);	382	}
		383
		384	static void poll_wait (void)
		385	{
		386	fd_set rfd;
		387
		388	while (eio_nreqs ())
		389	{
		390	int size;
		391
		392	X_LOCK (reslock);
		393	size = res_queue.size;
		394	X_UNLOCK (reslock);
		395
		396	if (size)
		397	return;
		398
		399	maybe_start_thread ();
		400
		401	FD_ZERO (&rfd);
		402	FD_SET (respipe [0], &rfd);
		403
		404	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		405	}
		406	}
		407
		408	static int poll_cb (void)
		409	{
		410	int res;
		411
		412	do
		413	{
		414	res = eio_poll ();
		415
		416	if (res > 0)
		417	croak (0);
		418	}
		419	while (max_outstanding && max_outstanding <= eio_nreqs ());
		420
		421	return res;
737	}	422	}
738		423
739	static void atfork_child (void)	424	static void atfork_child (void)
740	{	425	{
741	aio_req prv;
742
743	started = 0;
744
745	while (reqs)
746	{
747	prv = reqs;
748	reqs = prv->next;
749	free_req (prv);
750	}
751
752	reqs = reqe = 0;
753
754	while (ress)
755	{
756	prv = ress;
757	ress = prv->next;
758	free_req (prv);
759	}
760
761	ress = rese = 0;
762
763	close (respipe [0]);
764	close (respipe [1]);
765	create_pipe ();	426	create_respipe ();
766
767	atfork_parent ();
768	}	427	}
769		428
770	#define dREQ \	429	#define dREQ \
771	aio_req req; \	430	aio_req req; \
		431	int req_pri = next_pri; \
		432	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
772	\	433	\
773	if (SvOK (callback) && !SvROK (callback)) \	434	if (SvOK (callback) && !SvROK (callback)) \
774	croak ("clalback must be undef or of reference type"); \	435	croak ("callback must be undef or of reference type"); \
775	\	436	\
776	Newz (0, req, 1, aio_cb); \	437	Newz (0, req, 1, eio_req); \
777	if (!req) \	438	if (!req) \
778	croak ("out of memory during aio_req allocation"); \	439	croak ("out of memory during eio_req allocation"); \
779	\	440	\
780	req->callback = newSVsv (callback);	441	req->callback = newSVsv (callback); \
		442	req->pri = req_pri
		443
		444	#define REQ_SEND \
		445	eio_submit (req); \
		446	\
		447	if (GIMME_V != G_VOID) \
		448	XPUSHs (req_sv (req, AIO_REQ_KLASS));
781		449
782	MODULE = IO::AIO PACKAGE = IO::AIO	450	MODULE = IO::AIO PACKAGE = IO::AIO
783		451
784	PROTOTYPES: ENABLE	452	PROTOTYPES: ENABLE
785		453
786	BOOT:	454	BOOT:
787	{	455	{
788	HV *stash = gv_stashpv ("IO::AIO", 1);	456	stash = gv_stashpv ("IO::AIO", 1);
		457
789	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	458	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
790	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	459	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
791	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	460	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		461	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		462	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		463	#ifdef _WIN32
		464	X_MUTEX_CHECK (wrklock);
		465	X_MUTEX_CHECK (reslock);
		466	X_MUTEX_CHECK (reqlock);
		467	X_MUTEX_CHECK (reqwait);
		468	X_MUTEX_CHECK (preadwritelock);
		469	X_MUTEX_CHECK (readdirlock);
792		470
793	create_pipe ();	471	X_COND_CHECK (reqwait);
794	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	472	#else
795	}	473	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		474	#endif
796		475
		476	create_respipe ();
		477
		478	if (eio_init (want_poll, done_poll) < 0)
		479	croak ("IO::AIO: unable to initialise eio library");
		480
		481	/* atfork child called in fifo order, so before eio's handler */
		482	X_THREAD_ATFORK (0, 0, atfork_child);
		483	}
		484
797	void	485	void
798	min_parallel (nthreads)	486	max_poll_reqs (int nreqs)
799	int nthreads
800	PROTOTYPE: $	487	PROTOTYPE: $
		488	CODE:
		489	eio_set_max_poll_reqs (nreqs);
801		490
802	void	491	void
803	max_parallel (nthreads)	492	max_poll_time (double nseconds)
804	int nthreads
805	PROTOTYPE: $	493	PROTOTYPE: $
806
807	int
808	max_outstanding (nreqs)
809	int nreqs
810	PROTOTYPE: $
811	CODE:	494	CODE:
812	RETVAL = max_outstanding;	495	eio_set_max_poll_time (nseconds);
		496
		497	void
		498	min_parallel (int nthreads)
		499	PROTOTYPE: $
		500	CODE:
		501	eio_set_min_parallel (nthreads);
		502
		503	void
		504	max_parallel (int nthreads)
		505	PROTOTYPE: $
		506	CODE:
		507	eio_set_max_parallel (nthreads);
		508
		509	void
		510	max_idle (int nthreads)
		511	PROTOTYPE: $
		512	CODE:
		513	eio_set_max_idle (nthreads);
		514
		515	void
		516	max_outstanding (int maxreqs)
		517	PROTOTYPE: $
		518	CODE:
813	max_outstanding = nreqs;	519	max_outstanding = maxreqs;
814		520
815	void	521	void
816	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	522	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
817	SV * pathname
818	int flags
819	int mode
820	SV * callback
821	PROTOTYPE: $$$;$	523	PROTOTYPE: $$$;$
822	CODE:	524	PPCODE:
823	{	525	{
824	dREQ;	526	dREQ;
825		527
826	req->type = REQ_OPEN;	528	req->type = EIO_OPEN;
827	req->data = newSVsv (pathname);	529	req->sv1 = newSVsv (pathname);
828	req->dataptr = SvPVbyte_nolen (req->data);	530	req->ptr1 = SvPVbyte_nolen (req->sv1);
829	req->fd = flags;	531	req->int1 = flags;
830	req->mode = mode;	532	req->int2 = mode;
831		533
832	send_req (req);	534	REQ_SEND;
833	}	535	}
834		536
835	void	537	void
836	aio_close (fh,callback=&PL_sv_undef)	538	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
837	SV * fh
838	SV * callback
839	PROTOTYPE: $;$	539	PROTOTYPE: $;$
840	ALIAS:	540	ALIAS:
841	aio_close = REQ_CLOSE
842	aio_fsync = REQ_FSYNC	541	aio_fsync = EIO_FSYNC
843	aio_fdatasync = REQ_FDATASYNC	542	aio_fdatasync = EIO_FDATASYNC
844	CODE:	543	PPCODE:
845	{	544	{
846	dREQ;	545	dREQ;
847		546
848	req->type = ix;	547	req->type = ix;
849	req->fh = newSVsv (fh);	548	req->sv1 = newSVsv (fh);
850	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	549	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
851		550
852	send_req (req);	551	REQ_SEND (req);
853	}	552	}
854		553
855	void	554	void
		555	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		556	PROTOTYPE: $;$
		557	PPCODE:
		558	{
		559	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		560	dREQ;
		561
		562	if (close_pipe < 0)
		563	{
		564	int pipefd [2];
		565
		566	if (pipe (pipefd) < 0
		567	|| close (pipefd [1]) < 0
		568	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		569	abort (); /*D*/
		570
		571	close_pipe = pipefd [0];
		572	}
		573
		574	req->type = EIO_DUP2;
		575	req->int1 = close_pipe;
		576	req->sv2 = newSVsv (fh);
		577	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		578
		579	REQ_SEND (req);
		580	}
		581
		582	void
856	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	583	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
857	SV * fh
858	UV offset
859	UV length
860	SV * data
861	UV dataoffset
862	SV * callback
863	ALIAS:	584	ALIAS:
864	aio_read = REQ_READ	585	aio_read = EIO_READ
865	aio_write = REQ_WRITE	586	aio_write = EIO_WRITE
866	PROTOTYPE: $$$$$;$	587	PROTOTYPE: $$$$$;$
867	CODE:	588	PPCODE:
868	{	589	{
869	aio_req req;
870	STRLEN svlen;	590	STRLEN svlen;
871	char *svptr = SvPVbyte (data, svlen);	591	char *svptr = SvPVbyte (data, svlen);
		592	UV len = SvUV (length);
872		593
873	SvUPGRADE (data, SVt_PV);	594	SvUPGRADE (data, SVt_PV);
874	SvPOK_on (data);	595	SvPOK_on (data);
875		596
876	if (dataoffset < 0)	597	if (dataoffset < 0)
877	dataoffset += svlen;	598	dataoffset += svlen;
878		599
879	if (dataoffset < 0 || dataoffset > svlen)	600	if (dataoffset < 0 || dataoffset > svlen)
880	croak ("data offset outside of string");	601	croak ("dataoffset outside of data scalar");
881		602
882	if (ix == REQ_WRITE)	603	if (ix == EIO_WRITE)
883	{	604	{
884	/* write: check length and adjust. */	605	/* write: check length and adjust. */
885	if (length < 0 || length + dataoffset > svlen)	606	if (!SvOK (length) || len + dataoffset > svlen)
886	length = svlen - dataoffset;	607	len = svlen - dataoffset;
887	}	608	}
888	else	609	else
889	{	610	{
890	/* read: grow scalar as necessary */	611	/* read: grow scalar as necessary */
891	svptr = SvGROW (data, length + dataoffset);	612	svptr = SvGROW (data, len + dataoffset + 1);
892	}	613	}
893		614
894	if (length < 0)	615	if (len < 0)
895	croak ("length must not be negative");	616	croak ("length must not be negative");
896		617
897	{	618	{
898	dREQ;	619	dREQ;
899		620
900	req->type = ix;	621	req->type = ix;
901	req->fh = newSVsv (fh);	622	req->sv1 = newSVsv (fh);
902	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	623	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
903	: IoOFP (sv_2io (fh)));	624	: IoOFP (sv_2io (fh)));
		625	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
904	req->offset = offset;	626	req->size = len;
905	req->length = length;
906	req->data = SvREFCNT_inc (data);	627	req->sv2 = SvREFCNT_inc (data);
907	req->dataptr = (char *)svptr + dataoffset;	628	req->ptr2 = (char *)svptr + dataoffset;
		629	req->stroffset = dataoffset;
908		630
909	if (!SvREADONLY (data))	631	if (!SvREADONLY (data))
910	{	632	{
911	SvREADONLY_on (data);	633	SvREADONLY_on (data);
912	req->data2ptr = (void *)data;	634	req->flags |= FLAG_SV2_RO_OFF;
913	}	635	}
914		636
915	send_req (req);	637	REQ_SEND;
916	}	638	}
917	}	639	}
918		640
919	void	641	void
		642	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		643	PROTOTYPE: $$;$
		644	PPCODE:
		645	{
		646	SV *data;
		647	dREQ;
		648
		649	data = newSV (NAME_MAX);
		650	SvPOK_on (data);
		651
		652	req->type = EIO_READLINK;
		653	req->sv1 = newSVsv (path);
		654	req->ptr1 = SvPVbyte_nolen (req->sv1);
		655	req->sv2 = data;
		656	req->ptr2 = SvPVbyte_nolen (data);
		657
		658	REQ_SEND;
		659	}
		660
		661	void
920	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	662	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
921	SV * out_fh
922	SV * in_fh
923	UV in_offset
924	UV length
925	SV * callback
926	PROTOTYPE: $$$$;$	663	PROTOTYPE: $$$$;$
927	CODE:	664	PPCODE:
928	{	665	{
929	dREQ;	666	dREQ;
930		667
931	req->type = REQ_SENDFILE;	668	req->type = EIO_SENDFILE;
932	req->fh = newSVsv (out_fh);	669	req->sv1 = newSVsv (out_fh);
933	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	670	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
934	req->fh2 = newSVsv (in_fh);	671	req->sv2 = newSVsv (in_fh);
935	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	672	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
936	req->offset = in_offset;	673	req->offs = SvVAL64 (in_offset);
937	req->length = length;	674	req->size = length;
938		675
939	send_req (req);	676	REQ_SEND;
940	}	677	}
941		678
942	void	679	void
943	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	680	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
944	SV * fh
945	UV offset
946	IV length
947	SV * callback
948	PROTOTYPE: $$$;$	681	PROTOTYPE: $$$;$
949	CODE:	682	PPCODE:
950	{	683	{
951	dREQ;	684	dREQ;
952		685
953	req->type = REQ_READAHEAD;	686	req->type = EIO_READAHEAD;
954	req->fh = newSVsv (fh);	687	req->sv1 = newSVsv (fh);
955	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	688	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
956	req->offset = offset;	689	req->offs = SvVAL64 (offset);
957	req->length = length;	690	req->size = length;
958		691
959	send_req (req);	692	REQ_SEND;
960	}	693	}
961		694
962	void	695	void
963	aio_stat (fh_or_path,callback=&PL_sv_undef)	696	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
964	SV * fh_or_path
965	SV * callback
966	ALIAS:	697	ALIAS:
967	aio_stat = REQ_STAT	698	aio_stat = EIO_STAT
968	aio_lstat = REQ_LSTAT	699	aio_lstat = EIO_LSTAT
969	CODE:	700	PPCODE:
970	{	701	{
971	dREQ;	702	dREQ;
972		703
973	New (0, req->statdata, 1, Stat_t);	704	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
974	if (!req->statdata)	705	if (!req->ptr2)
975	{	706	{
976	free_req (req);	707	req_destroy (req);
977	croak ("out of memory during aio_req->statdata allocation");	708	croak ("out of memory during aio_stat statdata allocation");
978	}	709	}
		710
		711	req->flags |= EIO_FLAG_PTR2_FREE;
		712	req->sv1 = newSVsv (fh_or_path);
979		713
980	if (SvPOK (fh_or_path))	714	if (SvPOK (fh_or_path))
981	{	715	{
982	req->type = ix;	716	req->type = ix;
983	req->data = newSVsv (fh_or_path);
984	req->dataptr = SvPVbyte_nolen (req->data);	717	req->ptr1 = SvPVbyte_nolen (req->sv1);
985	}	718	}
986	else	719	else
987	{	720	{
988	req->type = REQ_FSTAT;	721	req->type = EIO_FSTAT;
989	req->fh = newSVsv (fh_or_path);
990	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	722	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		723	}
		724
		725	REQ_SEND;
		726	}
		727
		728	void
		729	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		730	PPCODE:
		731	{
		732	dREQ;
		733
		734	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		735	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		736	req->sv1 = newSVsv (fh_or_path);
		737
		738	if (SvPOK (fh_or_path))
991	}	739	{
		740	req->type = EIO_UTIME;
		741	req->ptr1 = SvPVbyte_nolen (req->sv1);
		742	}
		743	else
		744	{
		745	req->type = EIO_FUTIME;
		746	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		747	}
992		748
993	send_req (req);	749	REQ_SEND;
994	}	750	}
995		751
996	void	752	void
		753	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		754	PPCODE:
		755	{
		756	dREQ;
		757
		758	req->sv1 = newSVsv (fh_or_path);
		759	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		760
		761	if (SvPOK (fh_or_path))
		762	{
		763	req->type = EIO_TRUNCATE;
		764	req->ptr1 = SvPVbyte_nolen (req->sv1);
		765	}
		766	else
		767	{
		768	req->type = EIO_FTRUNCATE;
		769	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		770	}
		771
		772	REQ_SEND;
		773	}
		774
		775	void
		776	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		777	ALIAS:
		778	aio_chmod = EIO_CHMOD
		779	aio_fchmod = EIO_FCHMOD
		780	aio_mkdir = EIO_MKDIR
		781	PPCODE:
		782	{
		783	dREQ;
		784
		785	req->type = ix;
		786	req->int2 = mode;
		787	req->sv1 = newSVsv (fh_or_path);
		788
		789	if (ix == EIO_FCHMOD)
		790	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		791	else
		792	req->ptr1 = SvPVbyte_nolen (req->sv1);
		793
		794	REQ_SEND;
		795	}
		796
		797	void
		798	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		799	PPCODE:
		800	{
		801	dREQ;
		802
		803	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		804	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		805	req->sv1 = newSVsv (fh_or_path);
		806
		807	if (SvPOK (fh_or_path))
		808	{
		809	req->type = EIO_CHOWN;
		810	req->ptr1 = SvPVbyte_nolen (req->sv1);
		811	}
		812	else
		813	{
		814	req->type = EIO_FCHOWN;
		815	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		816	}
		817
		818	REQ_SEND;
		819	}
		820
		821	void
997	aio_unlink (pathname,callback=&PL_sv_undef)	822	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
998	SV * pathname
999	SV * callback
1000	ALIAS:	823	ALIAS:
1001	aio_unlink = REQ_UNLINK	824	aio_unlink = EIO_UNLINK
1002	aio_rmdir = REQ_RMDIR	825	aio_rmdir = EIO_RMDIR
1003	aio_readdir = REQ_READDIR	826	aio_readdir = EIO_READDIR
1004	CODE:	827	PPCODE:
1005	{	828	{
1006	dREQ;	829	dREQ;
1007		830
1008	req->type = ix;	831	req->type = ix;
1009	req->data = newSVsv (pathname);	832	req->sv1 = newSVsv (pathname);
1010	req->dataptr = SvPVbyte_nolen (req->data);	833	req->ptr1 = SvPVbyte_nolen (req->sv1);
1011
1012	send_req (req);
1013	}
1014		834
		835	REQ_SEND;
		836	}
		837
1015	void	838	void
1016	aio_link (oldpath,newpath,callback=&PL_sv_undef)	839	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1017	SV * oldpath
1018	SV * newpath
1019	SV * callback
1020	ALIAS:	840	ALIAS:
1021	aio_link = REQ_LINK	841	aio_link = EIO_LINK
1022	aio_symlink = REQ_SYMLINK	842	aio_symlink = EIO_SYMLINK
1023	aio_rename = REQ_RENAME	843	aio_rename = EIO_RENAME
1024	CODE:	844	PPCODE:
1025	{	845	{
1026	dREQ;	846	dREQ;
1027		847
1028	req->type = ix;	848	req->type = ix;
1029	req->fh = newSVsv (oldpath);	849	req->sv1 = newSVsv (oldpath);
1030	req->data2ptr = SvPVbyte_nolen (req->fh);	850	req->ptr1 = SvPVbyte_nolen (req->sv1);
1031	req->data = newSVsv (newpath);	851	req->sv2 = newSVsv (newpath);
1032	req->dataptr = SvPVbyte_nolen (req->data);	852	req->ptr2 = SvPVbyte_nolen (req->sv2);
1033		853
1034	send_req (req);	854	REQ_SEND;
1035	}	855	}
1036		856
1037	#if 0
1038
1039	# undocumented, because it does not cancel active requests
1040	void	857	void
1041	cancel_most_requests ()	858	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		859	PPCODE:
		860	{
		861	dREQ;
		862
		863	req->type = EIO_MKNOD;
		864	req->sv1 = newSVsv (pathname);
		865	req->ptr1 = SvPVbyte_nolen (req->sv1);
		866	req->int2 = (mode_t)mode;
		867	req->offs = dev;
		868
		869	REQ_SEND;
		870	}
		871
		872	void
		873	aio_busy (double delay, SV *callback=&PL_sv_undef)
		874	PPCODE:
		875	{
		876	dREQ;
		877
		878	req->type = EIO_BUSY;
		879	req->nv1 = delay < 0. ? 0. : delay;
		880
		881	REQ_SEND;
		882	}
		883
		884	void
		885	aio_group (SV *callback=&PL_sv_undef)
1042	PROTOTYPE:	886	PROTOTYPE: ;$
1043	CODE:	887	PPCODE:
1044	{	888	{
1045	aio_req *req;	889	dREQ;
1046		890
1047	pthread_mutex_lock (&reqlock);	891	req->type = EIO_GROUP;
1048	for (req = reqs; req; req = req->next)
1049	req->flags |= 1;
1050	pthread_mutex_unlock (&reqlock);
1051		892
1052	pthread_mutex_lock (&reslock);	893	eio_submit (req);
1053	for (req = ress; req; req = req->next)	894	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1054	req->flags |= 1;
1055	pthread_mutex_unlock (&reslock);
1056	}	895	}
1057		896
1058	#endif	897	void
		898	aio_nop (SV *callback=&PL_sv_undef)
		899	ALIAS:
		900	aio_nop = EIO_NOP
		901	aio_sync = EIO_SYNC
		902	PPCODE:
		903	{
		904	dREQ;
		905
		906	req->type = ix;
		907
		908	REQ_SEND;
		909	}
		910
		911	int
		912	aioreq_pri (int pri = 0)
		913	PROTOTYPE: ;$
		914	CODE:
		915	RETVAL = next_pri - EIO_PRI_BIAS;
		916	if (items > 0)
		917	{
		918	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		919	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		920	next_pri = pri + EIO_PRI_BIAS;
		921	}
		922	OUTPUT:
		923	RETVAL
		924
		925	void
		926	aioreq_nice (int nice = 0)
		927	CODE:
		928	nice = next_pri - nice;
		929	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		930	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		931	next_pri = nice + EIO_PRI_BIAS;
1059		932
1060	void	933	void
1061	flush ()	934	flush ()
1062	PROTOTYPE:	935	PROTOTYPE:
1063	CODE:	936	CODE:
1064	while (nreqs)	937	while (eio_nreqs ())
1065	{	938	{
1066	poll_wait ();	939	poll_wait ();
1067	poll_cb ();	940	poll_cb ();
1068	}	941	}
1069		942
1070	void	943	int
1071	poll()	944	poll()
1072	PROTOTYPE:	945	PROTOTYPE:
1073	CODE:	946	CODE:
1074	if (nreqs)
1075	{
1076	poll_wait ();	947	poll_wait ();
1077	poll_cb ();	948	RETVAL = poll_cb ();
1078	}	949	OUTPUT:
		950	RETVAL
1079		951
1080	int	952	int
1081	poll_fileno()	953	poll_fileno()
1082	PROTOTYPE:	954	PROTOTYPE:
1083	CODE:	955	CODE:
…		…
1095		967
1096	void	968	void
1097	poll_wait()	969	poll_wait()
1098	PROTOTYPE:	970	PROTOTYPE:
1099	CODE:	971	CODE:
1100	if (nreqs)
1101	poll_wait ();	972	poll_wait ();
1102		973
1103	int	974	int
1104	nreqs()	975	nreqs()
1105	PROTOTYPE:	976	PROTOTYPE:
1106	CODE:	977	CODE:
1107	RETVAL = nreqs;	978	RETVAL = eio_nreqs ();
1108	OUTPUT:	979	OUTPUT:
1109	RETVAL	980	RETVAL
1110		981
		982	int
		983	nready()
		984	PROTOTYPE:
		985	CODE:
		986	RETVAL = eio_nready ();
		987	OUTPUT:
		988	RETVAL
		989
		990	int
		991	npending()
		992	PROTOTYPE:
		993	CODE:
		994	RETVAL = eio_npending ();
		995	OUTPUT:
		996	RETVAL
		997
		998	int
		999	nthreads()
		1000	PROTOTYPE:
		1001	CODE:
		1002	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		1003	RETVAL = started;
		1004	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		1005	OUTPUT:
		1006	RETVAL
		1007
		1008	PROTOTYPES: DISABLE
		1009
		1010	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1011
		1012	void
		1013	cancel (aio_req_ornot req)
		1014	CODE:
		1015	eio_cancel (req);
		1016
		1017	void
		1018	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1019	CODE:
		1020	SvREFCNT_dec (req->callback);
		1021	req->callback = newSVsv (callback);
		1022
		1023	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1024
		1025	void
		1026	add (aio_req grp, ...)
		1027	PPCODE:
		1028	{
		1029	int i;
		1030
		1031	if (grp->int1 == 2)
		1032	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1033
		1034	for (i = 1; i < items; ++i )
		1035	{
		1036	aio_req req;
		1037
		1038	if (GIMME_V != G_VOID)
		1039	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1040
		1041	req = SvAIO_REQ (ST (i));
		1042
		1043	if (req)
		1044	eio_grp_add (grp, req);
		1045	}
		1046	}
		1047
		1048	void
		1049	cancel_subs (aio_req_ornot req)
		1050	CODE:
		1051	req_cancel_subs (req);
		1052
		1053	void
		1054	result (aio_req grp, ...)
		1055	CODE:
		1056	{
		1057	int i;
		1058	AV *av;
		1059
		1060	grp->errorno = errno;
		1061
		1062	av = newAV ();
		1063
		1064	for (i = 1; i < items; ++i )
		1065	av_push (av, newSVsv (ST (i)));
		1066
		1067	SvREFCNT_dec (grp->sv1);
		1068	grp->sv1 = (SV *)av;
		1069	}
		1070
		1071	void
		1072	errno (aio_req grp, int errorno = errno)
		1073	CODE:
		1074	grp->errorno = errorno;
		1075
		1076	void
		1077	limit (aio_req grp, int limit)
		1078	CODE:
		1079	eio_grp_limit (grp, limit);
		1080
		1081	void
		1082	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1083	CODE:
		1084	{
		1085	SvREFCNT_dec (grp->sv2);
		1086	grp->sv2 = newSVsv (callback);
		1087
		1088	if (grp->int2 <= 0)
		1089	grp->int2 = 2;
		1090
		1091	eio_grp_limit (grp, grp->int2);
		1092	}
		1093

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