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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.42 by root, Fri Jul 21 07:35:31 2006 UTC vs.
Revision 1.121 by root, Tue May 13 18:50:27 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	/* perl namespace pollution */
23	# if __linux	19	#undef VERSION
24	# include <sys/sendfile.h>	20
25	# elif __freebsd	21	#ifdef _WIN32
26	# include <sys/socket.h>	22
27	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
28	# elif __hpux	24	# undef malloc
29	# include <sys/socket.h>	25	# undef free
30	# elif __solaris /* not yet */	26
31	# include <sys/sendfile.h>	27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
32	# else	59	#else
33	# error sendfile support requested but not available	60
34	# endif	61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
35	#endif	68	#endif
36		69
37	/* used for struct dirent, AIX doesn't provide it */	70	#define EIO_STRUCT_STAT Stat_t
38	#ifndef NAME_MAX	71
39	# define NAME_MAX 4096	72	/* use NV for 32 bit perls as it allows larger offsets */
		73	#if IVSIZE >= 8
		74	# define SvVAL64 SvIV
		75	#else
		76	# define SvVAL64 SvNV
40	#endif	77	#endif
41		78
42	#if __ia64	79	static HV *stash;
43	# define STACKSIZE 65536	80	typedef SV SV8; /* byte-sv, used for argument-checking */
44	#else	81
45	# define STACKSIZE 8192	82	#define AIO_REQ_KLASS "IO::AIO::REQ"
46	#endif	83	#define AIO_GRP_KLASS "IO::AIO::GRP"
		84
		85	#define EIO_REQ_MEMBERS \
		86	SV *callback; \
		87	SV *sv1, *sv2; \
		88	STRLEN stroffset; \
		89	SV *self;
		90
		91	#include "libeio/eio.h"
		92
		93	static int req_invoke (eio_req *req);
		94	#define EIO_FINISH(req) req_invoke (req)
		95	static void aio_grp_feed (eio_req *grp);
		96	#define EIO_FEED(req) aio_grp_feed (req)
		97	static void req_destroy (eio_req *grp);
		98	#define EIO_DESTROY(req) req_destroy (req)
47		99
48	enum {	100	enum {
49	REQ_QUIT,	101	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	};	102	};
59		103
60	typedef struct aio_cb {	104	#include "libeio/eio.c"
61	struct aio_cb *volatile next;
62		105
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;	106	typedef eio_req *aio_req;
		107	typedef eio_req *aio_req_ornot;
81		108
82	static int started, wanted;	109	static SV *on_next_submit;
83	static volatile int nreqs;	110	static int next_pri = EIO_PRI_DEFAULT;
84	static int max_outstanding = 1<<30;	111	static int max_outstanding;
85	static int respipe [2];
86		112
87	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	113	static int respipe_osf [2], respipe [2] = { -1, -1 };
88	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
89	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
90		114
91	static volatile aio_req reqs, reqe; /* queue start, queue end */	115	static void req_destroy (aio_req req);
92	static volatile aio_req ress, rese; /* queue start, queue end */
93
94	static void free_req (aio_req req)	116	static void req_cancel (aio_req req);
95	{
96	if (req->data)
97	SvREFCNT_dec (req->data);
98		117
		118	static void want_poll (void)
		119	{
		120	/* write a dummy byte to the pipe so fh becomes ready */
		121	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		122	}
		123
		124	static void done_poll (void)
		125	{
		126	/* read any signals sent by the worker threads */
		127	char buf [4];
		128	while (respipe_read (respipe [0], buf, 4) == 4)
		129	;
		130	}
		131
		132	/* must be called at most once */
		133	static SV *req_sv (aio_req req, const char *klass)
		134	{
99	if (req->fh)	135	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	{	136	{
122	fd_set rfd;	137	req->self = (SV *)newHV ();
123	FD_ZERO(&rfd);	138	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	}	139	}
128	}
129		140
130	static int	141	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
131	poll_cb ()	142	}
		143
		144	static aio_req SvAIO_REQ (SV *sv)
		145	{
		146	MAGIC *mg;
		147
		148	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		149	croak ("object of class " AIO_REQ_KLASS " expected");
		150
		151	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		152
		153	return mg ? (aio_req)mg->mg_ptr : 0;
		154	}
		155
		156	static void aio_grp_feed (aio_req grp)
		157	{
		158	if (grp->sv2 && SvOK (grp->sv2))
		159	{
		160	dSP;
		161
		162	ENTER;
		163	SAVETMPS;
		164	PUSHMARK (SP);
		165	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		166	PUTBACK;
		167	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		168	SPAGAIN;
		169	FREETMPS;
		170	LEAVE;
		171	}
		172	}
		173
		174	static void req_submit (eio_req *req)
		175	{
		176	eio_submit (req);
		177
		178	if (on_next_submit)
		179	{
		180	dSP;
		181	SV *cb = sv_2mortal (on_next_submit);
		182
		183	on_next_submit = 0;
		184
		185	PUSHMARK (SP);
		186	PUTBACK;
		187	call_sv (cb, G_DISCARD | G_EVAL);
		188	}
		189	}
		190
		191	static int req_invoke (eio_req *req)
132	{	192	{
133	dSP;	193	dSP;
134	int count = 0;
135	int do_croak = 0;
136	aio_req req;
137		194
138	for (;;)	195	if (req->flags & FLAG_SV2_RO_OFF)
		196	SvREADONLY_off (req->sv2);
		197
		198	if (!EIO_CANCELLED (req) && SvOK (req->callback))
139	{	199	{
140	pthread_mutex_lock (&reslock);	200	ENTER;
141	req = ress;	201	SAVETMPS;
		202	PUSHMARK (SP);
		203	EXTEND (SP, 1);
142		204
143	if (req)	205	switch (req->type)
144	{	206	{
145	ress = req->next;	207	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	{	208	{
190	SV *rv = &PL_sv_undef;	209	SV *rv = &PL_sv_undef;
191		210
192	if (req->result >= 0)	211	if (req->result >= 0)
193	{	212	{
		213	int i;
194	char *buf = req->data2ptr;	214	char *buf = req->ptr2;
195	AV *av = newAV ();	215	AV *av = newAV ();
196		216
197	while (req->result)	217	av_extend (av, req->result - 1);
		218
		219	for (i = 0; i < req->result; ++i)
198	{	220	{
199	SV *sv = newSVpv (buf, 0);	221	SV *sv = newSVpv (buf, 0);
200		222
201	av_push (av, sv);	223	av_store (av, i, sv);
202	buf += SvCUR (sv) + 1;	224	buf += SvCUR (sv) + 1;
203	req->result--;
204	}	225	}
205		226
206	rv = sv_2mortal (newRV_noinc ((SV *)av));	227	rv = sv_2mortal (newRV_noinc ((SV *)av));
207	}	228	}
208		229
209	XPUSHs (rv);	230	PUSHs (rv);
210	}	231	}
211	else	232	break;
		233
		234	case EIO_OPEN:
212	{	235	{
213	XPUSHs (sv_2mortal (newSViv (req->result)));	236	/* convert fd to fh */
		237	SV *fh = &PL_sv_undef;
214		238
215	if (req->type == REQ_OPEN)	239	if (req->result >= 0)
216	{	240	{
217	/* convert fd to fh */	241	GV *gv = (GV *)sv_newmortal ();
		242	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		243	char sym [64];
		244	int symlen;
		245
		246	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		247	gv_init (gv, stash, sym, symlen, 0);
		248
		249	symlen = snprintf (
		250	sym,
		251	sizeof (sym),
		252	"%s&=%d",
		253	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		254	req->result
218	SV *fh;	255	);
219		256
220	PUTBACK;	257	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
221	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	258	fh = (SV *)gv;
222	SPAGAIN;
223
224	fh = SvREFCNT_inc (POPs);
225
226	PUSHMARK (SP);
227	XPUSHs (sv_2mortal (fh));
228	}	259	}
		260
		261	PUSHs (fh);
229	}	262	}
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;	263	break;
645		264
646	pthread_cond_wait (&reqwait, &reqlock);	265	case EIO_GROUP:
647	}	266	req->int1 = 2; /* mark group as finished */
648		267
649	pthread_mutex_unlock (&reqlock);	268	if (req->sv1)
650
651	errno = 0; /* strictly unnecessary */
652
653	type = req->type;
654
655	switch (type)
656	{	269	{
657	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	270	int i;
658	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	271	AV *av = (AV *)req->sv1;
659		272
660	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	273	EXTEND (SP, AvFILL (av) + 1);
661	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	274	for (i = 0; i <= AvFILL (av); ++i)
662		275	PUSHs (*av_fetch (av, i, 0));
663	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	276	}
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;	277	break;
681		278
		279	case EIO_NOP:
		280	case EIO_BUSY:
		281	break;
		282
		283	case EIO_READLINK:
		284	if (req->result > 0)
		285	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		286	break;
		287
		288	case EIO_STAT:
		289	case EIO_LSTAT:
		290	case EIO_FSTAT:
		291	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		292	PL_laststatval = req->result;
		293	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		294	PUSHs (sv_2mortal (newSViv (req->result)));
		295	break;
		296
		297	case EIO_READ:
		298	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		299	*SvEND (req->sv2) = 0;
		300	PUSHs (sv_2mortal (newSViv (req->result)));
		301	break;
		302
		303	case EIO_DUP2:
		304	if (req->result > 0)
		305	req->result = 0;
		306	/* FALLTHROUGH */
		307
682	default:	308	default:
683	req->result = ENOSYS;	309	PUSHs (sv_2mortal (newSViv (req->result)));
684	break;	310	break;
685	}	311	}
686		312
687	req->errorno = errno;	313	errno = req->errorno;
688		314
689	pthread_mutex_lock (&reslock);	315	PUTBACK;
		316	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		317	SPAGAIN;
690		318
691	req->next = 0;	319	FREETMPS;
		320	LEAVE;
692		321
693	if (rese)	322	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	}	323	}
708	while (type != REQ_QUIT);
709		324
		325	return !!SvTRUE (ERRSV);
		326	}
		327
		328	static void req_destroy (aio_req req)
		329	{
		330	if (req->self)
		331	{
		332	sv_unmagic (req->self, PERL_MAGIC_ext);
		333	SvREFCNT_dec (req->self);
		334	}
		335
		336	SvREFCNT_dec (req->sv1);
		337	SvREFCNT_dec (req->sv2);
		338	SvREFCNT_dec (req->callback);
		339
		340	Safefree (req);
		341	}
		342
		343	static void req_cancel_subs (aio_req grp)
		344	{
		345	aio_req sub;
		346
		347	if (grp->type != EIO_GROUP)
710	return 0;	348	return;
711	}
712		349
713	/*****************************************************************************/	350	SvREFCNT_dec (grp->sv2);
		351	grp->sv2 = 0;
714		352
715	static void atfork_prepare (void)	353	eio_grp_cancel (grp);
716	{	354	}
717	pthread_mutex_lock (&reqlock);	355
718	pthread_mutex_lock (&reslock);	356	#ifdef USE_SOCKETS_AS_HANDLES
719	#if !HAVE_PREADWRITE	357	# define TO_SOCKET(x) (win32_get_osfhandle (x))
720	pthread_mutex_lock (&preadwritelock);	358	#else
		359	# define TO_SOCKET(x) (x)
721	#endif	360	#endif
722	#if !HAVE_READDIR_R	361
723	pthread_mutex_lock (&readdirlock);	362	static void
		363	create_respipe (void)
		364	{
		365	int old_readfd = respipe [0];
		366
		367	if (respipe [1] >= 0)
		368	respipe_close (TO_SOCKET (respipe [1]));
		369
		370	#ifdef _WIN32
		371	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		372	#else
		373	if (pipe (respipe))
724	#endif	374	#endif
725	}	375	croak ("unable to initialize result pipe");
726		376
727	static void atfork_parent (void)	377	if (old_readfd >= 0)
728	{	378	{
729	#if !HAVE_READDIR_R	379	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
730	pthread_mutex_unlock (&readdirlock);	380	croak ("unable to initialize result pipe(2)");
		381
		382	respipe_close (respipe [0]);
		383	respipe [0] = old_readfd;
		384	}
		385
		386	#ifdef _WIN32
		387	int arg = 1;
		388	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		389	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		390	#else
		391	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		392	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
731	#endif	393	#endif
732	#if !HAVE_PREADWRITE	394	croak ("unable to initialize result pipe(3)");
733	pthread_mutex_unlock (&preadwritelock);	395
734	#endif	396	respipe_osf [0] = TO_SOCKET (respipe [0]);
735	pthread_mutex_unlock (&reslock);	397	respipe_osf [1] = TO_SOCKET (respipe [1]);
736	pthread_mutex_unlock (&reqlock);	398	}
		399
		400	static void poll_wait (void)
		401	{
		402	fd_set rfd;
		403
		404	while (eio_nreqs ())
		405	{
		406	int size;
		407
		408	X_LOCK (reslock);
		409	size = res_queue.size;
		410	X_UNLOCK (reslock);
		411
		412	if (size)
		413	return;
		414
		415	maybe_start_thread ();
		416
		417	FD_ZERO (&rfd);
		418	FD_SET (respipe [0], &rfd);
		419
		420	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		421	}
		422	}
		423
		424	static int poll_cb (void)
		425	{
		426	int res;
		427
		428	do
		429	{
		430	res = eio_poll ();
		431
		432	if (res > 0)
		433	croak (0);
		434	}
		435	while (max_outstanding && max_outstanding <= eio_nreqs ());
		436
		437	return res;
737	}	438	}
738		439
739	static void atfork_child (void)	440	static void atfork_child (void)
740	{	441	{
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 ();	442	create_respipe ();
766
767	atfork_parent ();
768	}	443	}
769		444
770	#define dREQ \	445	#define dREQ \
771	aio_req req; \	446	aio_req req; \
		447	int req_pri = next_pri; \
		448	next_pri = EIO_PRI_DEFAULT; \
772	\	449	\
773	if (SvOK (callback) && !SvROK (callback)) \	450	if (SvOK (callback) && !SvROK (callback)) \
774	croak ("clalback must be undef or of reference type"); \	451	croak ("callback must be undef or of reference type"); \
775	\	452	\
776	Newz (0, req, 1, aio_cb); \	453	Newz (0, req, 1, eio_req); \
777	if (!req) \	454	if (!req) \
778	croak ("out of memory during aio_req allocation"); \	455	croak ("out of memory during eio_req allocation"); \
779	\	456	\
780	req->callback = newSVsv (callback);	457	req->callback = newSVsv (callback); \
		458	req->pri = req_pri
		459
		460	#define REQ_SEND \
		461	req_submit (req); \
		462	\
		463	if (GIMME_V != G_VOID) \
		464	XPUSHs (req_sv (req, AIO_REQ_KLASS));
781		465
782	MODULE = IO::AIO PACKAGE = IO::AIO	466	MODULE = IO::AIO PACKAGE = IO::AIO
783		467
784	PROTOTYPES: ENABLE	468	PROTOTYPES: ENABLE
785		469
786	BOOT:	470	BOOT:
787	{	471	{
788	HV *stash = gv_stashpv ("IO::AIO", 1);	472	stash = gv_stashpv ("IO::AIO", 1);
		473
789	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	474	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
790	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	475	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
791	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	476	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		477	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		478	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		479	#ifdef _WIN32
		480	X_MUTEX_CHECK (wrklock);
		481	X_MUTEX_CHECK (reslock);
		482	X_MUTEX_CHECK (reqlock);
		483	X_MUTEX_CHECK (reqwait);
		484	X_MUTEX_CHECK (preadwritelock);
		485	X_MUTEX_CHECK (readdirlock);
792		486
793	create_pipe ();	487	X_COND_CHECK (reqwait);
794	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	488	#else
795	}	489	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		490	#endif
796		491
		492	create_respipe ();
		493
		494	if (eio_init (want_poll, done_poll) < 0)
		495	croak ("IO::AIO: unable to initialise eio library");
		496
		497	/* atfork child called in fifo order, so before eio's handler */
		498	X_THREAD_ATFORK (0, 0, atfork_child);
		499	}
		500
797	void	501	void
798	min_parallel (nthreads)	502	max_poll_reqs (int nreqs)
799	int nthreads
800	PROTOTYPE: $	503	PROTOTYPE: $
		504	CODE:
		505	eio_set_max_poll_reqs (nreqs);
801		506
802	void	507	void
803	max_parallel (nthreads)	508	max_poll_time (double nseconds)
804	int nthreads
805	PROTOTYPE: $	509	PROTOTYPE: $
806
807	int
808	max_outstanding (nreqs)
809	int nreqs
810	PROTOTYPE: $
811	CODE:	510	CODE:
812	RETVAL = max_outstanding;	511	eio_set_max_poll_time (nseconds);
		512
		513	void
		514	min_parallel (int nthreads)
		515	PROTOTYPE: $
		516	CODE:
		517	eio_set_min_parallel (nthreads);
		518
		519	void
		520	max_parallel (int nthreads)
		521	PROTOTYPE: $
		522	CODE:
		523	eio_set_max_parallel (nthreads);
		524
		525	void
		526	max_idle (int nthreads)
		527	PROTOTYPE: $
		528	CODE:
		529	eio_set_max_idle (nthreads);
		530
		531	void
		532	max_outstanding (int maxreqs)
		533	PROTOTYPE: $
		534	CODE:
813	max_outstanding = nreqs;	535	max_outstanding = maxreqs;
814		536
815	void	537	void
816	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	538	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: $$$;$	539	PROTOTYPE: $$$;$
822	CODE:	540	PPCODE:
823	{	541	{
824	dREQ;	542	dREQ;
825		543
826	req->type = REQ_OPEN;	544	req->type = EIO_OPEN;
827	req->data = newSVsv (pathname);	545	req->sv1 = newSVsv (pathname);
828	req->dataptr = SvPVbyte_nolen (req->data);	546	req->ptr1 = SvPVbyte_nolen (req->sv1);
829	req->fd = flags;	547	req->int1 = flags;
830	req->mode = mode;	548	req->int2 = mode;
831		549
832	send_req (req);	550	REQ_SEND;
833	}	551	}
834		552
835	void	553	void
836	aio_close (fh,callback=&PL_sv_undef)	554	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
837	SV * fh
838	SV * callback
839	PROTOTYPE: $;$	555	PROTOTYPE: $;$
840	ALIAS:	556	ALIAS:
841	aio_close = REQ_CLOSE
842	aio_fsync = REQ_FSYNC	557	aio_fsync = EIO_FSYNC
843	aio_fdatasync = REQ_FDATASYNC	558	aio_fdatasync = EIO_FDATASYNC
844	CODE:	559	PPCODE:
845	{	560	{
846	dREQ;	561	dREQ;
847		562
848	req->type = ix;	563	req->type = ix;
849	req->fh = newSVsv (fh);	564	req->sv1 = newSVsv (fh);
850	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	565	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
851		566
852	send_req (req);	567	REQ_SEND (req);
853	}	568	}
854		569
855	void	570	void
		571	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		572	PROTOTYPE: $;$
		573	PPCODE:
		574	{
		575	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		576	dREQ;
		577
		578	if (close_pipe < 0)
		579	{
		580	int pipefd [2];
		581
		582	if (pipe (pipefd) < 0
		583	|| close (pipefd [1]) < 0
		584	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		585	abort (); /*D*/
		586
		587	close_pipe = pipefd [0];
		588	}
		589
		590	req->type = EIO_DUP2;
		591	req->int1 = close_pipe;
		592	req->sv2 = newSVsv (fh);
		593	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		594
		595	REQ_SEND (req);
		596	}
		597
		598	void
856	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	599	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:	600	ALIAS:
864	aio_read = REQ_READ	601	aio_read = EIO_READ
865	aio_write = REQ_WRITE	602	aio_write = EIO_WRITE
866	PROTOTYPE: $$$$$;$	603	PROTOTYPE: $$$$$;$
867	CODE:	604	PPCODE:
868	{	605	{
869	aio_req req;
870	STRLEN svlen;	606	STRLEN svlen;
871	char *svptr = SvPVbyte (data, svlen);	607	char *svptr = SvPVbyte (data, svlen);
		608	UV len = SvUV (length);
872		609
873	SvUPGRADE (data, SVt_PV);	610	SvUPGRADE (data, SVt_PV);
874	SvPOK_on (data);	611	SvPOK_on (data);
875		612
876	if (dataoffset < 0)	613	if (dataoffset < 0)
877	dataoffset += svlen;	614	dataoffset += svlen;
878		615
879	if (dataoffset < 0 || dataoffset > svlen)	616	if (dataoffset < 0 || dataoffset > svlen)
880	croak ("data offset outside of string");	617	croak ("dataoffset outside of data scalar");
881		618
882	if (ix == REQ_WRITE)	619	if (ix == EIO_WRITE)
883	{	620	{
884	/* write: check length and adjust. */	621	/* write: check length and adjust. */
885	if (length < 0 || length + dataoffset > svlen)	622	if (!SvOK (length) || len + dataoffset > svlen)
886	length = svlen - dataoffset;	623	len = svlen - dataoffset;
887	}	624	}
888	else	625	else
889	{	626	{
890	/* read: grow scalar as necessary */	627	/* read: grow scalar as necessary */
891	svptr = SvGROW (data, length + dataoffset);	628	svptr = SvGROW (data, len + dataoffset + 1);
892	}	629	}
893		630
894	if (length < 0)	631	if (len < 0)
895	croak ("length must not be negative");	632	croak ("length must not be negative");
896		633
897	{	634	{
898	dREQ;	635	dREQ;
899		636
900	req->type = ix;	637	req->type = ix;
901	req->fh = newSVsv (fh);	638	req->sv1 = newSVsv (fh);
902	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	639	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
903	: IoOFP (sv_2io (fh)));	640	: IoOFP (sv_2io (fh)));
		641	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
904	req->offset = offset;	642	req->size = len;
905	req->length = length;
906	req->data = SvREFCNT_inc (data);	643	req->sv2 = SvREFCNT_inc (data);
907	req->dataptr = (char *)svptr + dataoffset;	644	req->ptr2 = (char *)svptr + dataoffset;
		645	req->stroffset = dataoffset;
908		646
909	if (!SvREADONLY (data))	647	if (!SvREADONLY (data))
910	{	648	{
911	SvREADONLY_on (data);	649	SvREADONLY_on (data);
912	req->data2ptr = (void *)data;	650	req->flags |= FLAG_SV2_RO_OFF;
913	}	651	}
914		652
915	send_req (req);	653	REQ_SEND;
916	}	654	}
917	}	655	}
918		656
919	void	657	void
		658	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		659	PROTOTYPE: $$;$
		660	PPCODE:
		661	{
		662	SV *data;
		663	dREQ;
		664
		665	req->type = EIO_READLINK;
		666	req->sv1 = newSVsv (path);
		667	req->ptr1 = SvPVbyte_nolen (req->sv1);
		668
		669	REQ_SEND;
		670	}
		671
		672	void
920	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	673	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: $$$$;$	674	PROTOTYPE: $$$$;$
927	CODE:	675	PPCODE:
928	{	676	{
929	dREQ;	677	dREQ;
930		678
931	req->type = REQ_SENDFILE;	679	req->type = EIO_SENDFILE;
932	req->fh = newSVsv (out_fh);	680	req->sv1 = newSVsv (out_fh);
933	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	681	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
934	req->fh2 = newSVsv (in_fh);	682	req->sv2 = newSVsv (in_fh);
935	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	683	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
936	req->offset = in_offset;	684	req->offs = SvVAL64 (in_offset);
937	req->length = length;	685	req->size = length;
938		686
939	send_req (req);	687	REQ_SEND;
940	}	688	}
941		689
942	void	690	void
943	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	691	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
944	SV * fh
945	UV offset
946	IV length
947	SV * callback
948	PROTOTYPE: $$$;$	692	PROTOTYPE: $$$;$
949	CODE:	693	PPCODE:
950	{	694	{
951	dREQ;	695	dREQ;
952		696
953	req->type = REQ_READAHEAD;	697	req->type = EIO_READAHEAD;
954	req->fh = newSVsv (fh);	698	req->sv1 = newSVsv (fh);
955	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	699	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
956	req->offset = offset;	700	req->offs = SvVAL64 (offset);
957	req->length = length;	701	req->size = length;
958		702
959	send_req (req);	703	REQ_SEND;
960	}	704	}
961		705
962	void	706	void
963	aio_stat (fh_or_path,callback=&PL_sv_undef)	707	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
964	SV * fh_or_path
965	SV * callback
966	ALIAS:	708	ALIAS:
967	aio_stat = REQ_STAT	709	aio_stat = EIO_STAT
968	aio_lstat = REQ_LSTAT	710	aio_lstat = EIO_LSTAT
969	CODE:	711	PPCODE:
970	{	712	{
971	dREQ;	713	dREQ;
972		714
973	New (0, req->statdata, 1, Stat_t);	715	req->sv1 = newSVsv (fh_or_path);
974	if (!req->statdata)
975	{
976	free_req (req);
977	croak ("out of memory during aio_req->statdata allocation");
978	}
979		716
980	if (SvPOK (fh_or_path))	717	if (SvPOK (req->sv1))
981	{	718	{
982	req->type = ix;	719	req->type = ix;
983	req->data = newSVsv (fh_or_path);
984	req->dataptr = SvPVbyte_nolen (req->data);	720	req->ptr1 = SvPVbyte_nolen (req->sv1);
985	}	721	}
986	else	722	else
987	{	723	{
988	req->type = REQ_FSTAT;	724	req->type = EIO_FSTAT;
989	req->fh = newSVsv (fh_or_path);
990	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	725	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		726	}
		727
		728	REQ_SEND;
		729	}
		730
		731	void
		732	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		733	PPCODE:
		734	{
		735	dREQ;
		736
		737	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		738	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		739	req->sv1 = newSVsv (fh_or_path);
		740
		741	if (SvPOK (req->sv1))
991	}	742	{
		743	req->type = EIO_UTIME;
		744	req->ptr1 = SvPVbyte_nolen (req->sv1);
		745	}
		746	else
		747	{
		748	req->type = EIO_FUTIME;
		749	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		750	}
992		751
993	send_req (req);	752	REQ_SEND;
994	}	753	}
995		754
996	void	755	void
		756	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		757	PPCODE:
		758	{
		759	dREQ;
		760
		761	req->sv1 = newSVsv (fh_or_path);
		762	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		763
		764	if (SvPOK (req->sv1))
		765	{
		766	req->type = EIO_TRUNCATE;
		767	req->ptr1 = SvPVbyte_nolen (req->sv1);
		768	}
		769	else
		770	{
		771	req->type = EIO_FTRUNCATE;
		772	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		773	}
		774
		775	REQ_SEND;
		776	}
		777
		778	void
		779	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		780	ALIAS:
		781	aio_chmod = EIO_CHMOD
		782	aio_mkdir = EIO_MKDIR
		783	PPCODE:
		784	{
		785	dREQ;
		786
		787	req->int2 = mode;
		788	req->sv1 = newSVsv (fh_or_path);
		789
		790	if (SvPOK (req->sv1))
		791	{
		792	req->type = ix;
		793	req->ptr1 = SvPVbyte_nolen (req->sv1);
		794	}
		795	else
		796	{
		797	req->type = EIO_FCHMOD;
		798	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		799	}
		800
		801	REQ_SEND;
		802	}
		803
		804	void
		805	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		806	PPCODE:
		807	{
		808	dREQ;
		809
		810	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		811	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		812	req->sv1 = newSVsv (fh_or_path);
		813
		814	if (SvPOK (req->sv1))
		815	{
		816	req->type = EIO_CHOWN;
		817	req->ptr1 = SvPVbyte_nolen (req->sv1);
		818	}
		819	else
		820	{
		821	req->type = EIO_FCHOWN;
		822	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		823	}
		824
		825	REQ_SEND;
		826	}
		827
		828	void
997	aio_unlink (pathname,callback=&PL_sv_undef)	829	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
998	SV * pathname
999	SV * callback
1000	ALIAS:	830	ALIAS:
1001	aio_unlink = REQ_UNLINK	831	aio_unlink = EIO_UNLINK
1002	aio_rmdir = REQ_RMDIR	832	aio_rmdir = EIO_RMDIR
1003	aio_readdir = REQ_READDIR	833	aio_readdir = EIO_READDIR
1004	CODE:	834	PPCODE:
1005	{	835	{
1006	dREQ;	836	dREQ;
1007		837
1008	req->type = ix;	838	req->type = ix;
1009	req->data = newSVsv (pathname);	839	req->sv1 = newSVsv (pathname);
1010	req->dataptr = SvPVbyte_nolen (req->data);	840	req->ptr1 = SvPVbyte_nolen (req->sv1);
1011
1012	send_req (req);
1013	}
1014		841
		842	REQ_SEND;
		843	}
		844
1015	void	845	void
1016	aio_link (oldpath,newpath,callback=&PL_sv_undef)	846	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1017	SV * oldpath
1018	SV * newpath
1019	SV * callback
1020	ALIAS:	847	ALIAS:
1021	aio_link = REQ_LINK	848	aio_link = EIO_LINK
1022	aio_symlink = REQ_SYMLINK	849	aio_symlink = EIO_SYMLINK
1023	aio_rename = REQ_RENAME	850	aio_rename = EIO_RENAME
1024	CODE:	851	PPCODE:
1025	{	852	{
1026	dREQ;	853	dREQ;
1027		854
1028	req->type = ix;	855	req->type = ix;
1029	req->fh = newSVsv (oldpath);	856	req->sv1 = newSVsv (oldpath);
1030	req->data2ptr = SvPVbyte_nolen (req->fh);	857	req->ptr1 = SvPVbyte_nolen (req->sv1);
1031	req->data = newSVsv (newpath);	858	req->sv2 = newSVsv (newpath);
1032	req->dataptr = SvPVbyte_nolen (req->data);	859	req->ptr2 = SvPVbyte_nolen (req->sv2);
1033		860
1034	send_req (req);	861	REQ_SEND;
1035	}	862	}
1036		863
1037	#if 0
1038
1039	# undocumented, because it does not cancel active requests
1040	void	864	void
1041	cancel_most_requests ()	865	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		866	PPCODE:
		867	{
		868	dREQ;
		869
		870	req->type = EIO_MKNOD;
		871	req->sv1 = newSVsv (pathname);
		872	req->ptr1 = SvPVbyte_nolen (req->sv1);
		873	req->int2 = (mode_t)mode;
		874	req->offs = dev;
		875
		876	REQ_SEND;
		877	}
		878
		879	void
		880	aio_busy (double delay, SV *callback=&PL_sv_undef)
		881	PPCODE:
		882	{
		883	dREQ;
		884
		885	req->type = EIO_BUSY;
		886	req->nv1 = delay < 0. ? 0. : delay;
		887
		888	REQ_SEND;
		889	}
		890
		891	void
		892	aio_group (SV *callback=&PL_sv_undef)
1042	PROTOTYPE:	893	PROTOTYPE: ;$
1043	CODE:	894	PPCODE:
1044	{	895	{
1045	aio_req *req;	896	dREQ;
1046		897
1047	pthread_mutex_lock (&reqlock);	898	req->type = EIO_GROUP;
1048	for (req = reqs; req; req = req->next)
1049	req->flags |= 1;
1050	pthread_mutex_unlock (&reqlock);
1051		899
1052	pthread_mutex_lock (&reslock);	900	eio_submit (req);
1053	for (req = ress; req; req = req->next)	901	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1054	req->flags |= 1;
1055	pthread_mutex_unlock (&reslock);
1056	}	902	}
1057		903
1058	#endif	904	void
		905	aio_nop (SV *callback=&PL_sv_undef)
		906	ALIAS:
		907	aio_nop = EIO_NOP
		908	aio_sync = EIO_SYNC
		909	PPCODE:
		910	{
		911	dREQ;
		912
		913	req->type = ix;
		914
		915	REQ_SEND;
		916	}
		917
		918	int
		919	aioreq_pri (int pri = 0)
		920	PROTOTYPE: ;$
		921	CODE:
		922	RETVAL = next_pri;
		923	if (items > 0)
		924	{
		925	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		926	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		927	next_pri = pri;
		928	}
		929	OUTPUT:
		930	RETVAL
		931
		932	void
		933	aioreq_nice (int nice = 0)
		934	CODE:
		935	nice = next_pri - nice;
		936	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		937	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		938	next_pri = nice;
1059		939
1060	void	940	void
1061	flush ()	941	flush ()
1062	PROTOTYPE:	942	PROTOTYPE:
1063	CODE:	943	CODE:
1064	while (nreqs)	944	while (eio_nreqs ())
1065	{	945	{
1066	poll_wait ();	946	poll_wait ();
1067	poll_cb ();	947	poll_cb ();
1068	}	948	}
1069		949
1070	void	950	int
1071	poll()	951	poll()
1072	PROTOTYPE:	952	PROTOTYPE:
1073	CODE:	953	CODE:
1074	if (nreqs)
1075	{
1076	poll_wait ();	954	poll_wait ();
1077	poll_cb ();	955	RETVAL = poll_cb ();
1078	}	956	OUTPUT:
		957	RETVAL
1079		958
1080	int	959	int
1081	poll_fileno()	960	poll_fileno()
1082	PROTOTYPE:	961	PROTOTYPE:
1083	CODE:	962	CODE:
…		…
1095		974
1096	void	975	void
1097	poll_wait()	976	poll_wait()
1098	PROTOTYPE:	977	PROTOTYPE:
1099	CODE:	978	CODE:
1100	if (nreqs)
1101	poll_wait ();	979	poll_wait ();
1102		980
1103	int	981	int
1104	nreqs()	982	nreqs()
1105	PROTOTYPE:	983	PROTOTYPE:
1106	CODE:	984	CODE:
1107	RETVAL = nreqs;	985	RETVAL = eio_nreqs ();
1108	OUTPUT:	986	OUTPUT:
1109	RETVAL	987	RETVAL
1110		988
		989	int
		990	nready()
		991	PROTOTYPE:
		992	CODE:
		993	RETVAL = eio_nready ();
		994	OUTPUT:
		995	RETVAL
		996
		997	int
		998	npending()
		999	PROTOTYPE:
		1000	CODE:
		1001	RETVAL = eio_npending ();
		1002	OUTPUT:
		1003	RETVAL
		1004
		1005	int
		1006	nthreads()
		1007	PROTOTYPE:
		1008	CODE:
		1009	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		1010	RETVAL = started;
		1011	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		1012	OUTPUT:
		1013	RETVAL
		1014
		1015	void _on_next_submit (SV *cb)
		1016	CODE:
		1017	SvREFCNT_dec (on_next_submit);
		1018	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1019
		1020	PROTOTYPES: DISABLE
		1021
		1022	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1023
		1024	void
		1025	cancel (aio_req_ornot req)
		1026	CODE:
		1027	eio_cancel (req);
		1028
		1029	void
		1030	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1031	CODE:
		1032	SvREFCNT_dec (req->callback);
		1033	req->callback = newSVsv (callback);
		1034
		1035	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1036
		1037	void
		1038	add (aio_req grp, ...)
		1039	PPCODE:
		1040	{
		1041	int i;
		1042
		1043	if (grp->int1 == 2)
		1044	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1045
		1046	for (i = 1; i < items; ++i )
		1047	{
		1048	aio_req req;
		1049
		1050	if (GIMME_V != G_VOID)
		1051	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1052
		1053	req = SvAIO_REQ (ST (i));
		1054
		1055	if (req)
		1056	eio_grp_add (grp, req);
		1057	}
		1058	}
		1059
		1060	void
		1061	cancel_subs (aio_req_ornot req)
		1062	CODE:
		1063	req_cancel_subs (req);
		1064
		1065	void
		1066	result (aio_req grp, ...)
		1067	CODE:
		1068	{
		1069	int i;
		1070	AV *av;
		1071
		1072	grp->errorno = errno;
		1073
		1074	av = newAV ();
		1075
		1076	for (i = 1; i < items; ++i )
		1077	av_push (av, newSVsv (ST (i)));
		1078
		1079	SvREFCNT_dec (grp->sv1);
		1080	grp->sv1 = (SV *)av;
		1081	}
		1082
		1083	void
		1084	errno (aio_req grp, int errorno = errno)
		1085	CODE:
		1086	grp->errorno = errorno;
		1087
		1088	void
		1089	limit (aio_req grp, int limit)
		1090	CODE:
		1091	eio_grp_limit (grp, limit);
		1092
		1093	void
		1094	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1095	CODE:
		1096	{
		1097	SvREFCNT_dec (grp->sv2);
		1098	grp->sv2 = newSVsv (callback);
		1099
		1100	if (grp->int2 <= 0)
		1101	grp->int2 = 2;
		1102
		1103	eio_grp_limit (grp, grp->int2);
		1104	}
		1105

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