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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.39 by root, Mon Feb 6 23:54:12 2006 UTC vs.
Revision 1.226 by root, Sun Jan 6 11:48:14 2013 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	#include "schmorp.h"
9
10	#include <pthread.h>
11		10
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
13	#include <sys/types.h>	14	#include <sys/types.h>
14	#include <sys/stat.h>	15	#include <sys/stat.h>
15	#include <limits.h>	16	#include <limits.h>
16	#include <unistd.h>
17	#include <fcntl.h>	17	#include <fcntl.h>
18	#include <signal.h>
19	#include <sched.h>	18	#include <sched.h>
20		19
21	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		21	# include <sys/mman.h>
		22	#endif
		23
22	# if __linux	24	#if __linux__
		25	# include <linux/fs.h>
		26	# ifdef FS_IOC_FIEMAP
		27	# include <linux/types.h>
		28	# include <linux/fiemap.h>
		29	# define HAVE_FIEMAP 1
		30	# endif
		31	#endif
		32
		33	/* perl namespace pollution */
		34	#undef VERSION
		35
		36	/* perl stupidly overrides readdir and maybe others */
		37	/* with thread-unsafe versions, imagine that :( */
		38	#undef readdir
		39	#undef opendir
		40	#undef closedir
		41
		42	#ifdef _WIN32
		43
		44	// perl overrides all those nice libc functions
		45
		46	#undef malloc
		47	#undef free
		48	#undef open
		49	#undef read
		50	#undef write
		51	#undef send
		52	#undef recv
		53	#undef stat
		54	#undef lstat
		55	#undef fstat
		56	#undef truncate
		57	#undef ftruncate
		58	#undef open
		59	#undef link
		60	#undef close
		61	#undef unlink
		62	#undef mkdir
		63	#undef rmdir
		64	#undef rename
		65	#undef lseek
		66	#undef opendir
		67	#undef readdir
		68	#undef closedir
		69	#undef chmod
		70	#undef fchmod
		71	#undef dup
		72	#undef dup2
		73	#undef abort
		74	#undef pipe
		75
		76	#define EIO_STRUCT_STAT struct _stati64
		77	#define EIO_STRUCT_STATI64
		78
		79	#else
		80
		81	#include <sys/time.h>
23	# include <sys/sendfile.h>	82	#include <sys/select.h>
24	# elif __freebsd	83	#include <unistd.h>
25	# include <sys/socket.h>	84	#include <utime.h>
26	# include <sys/uio.h>	85	#include <signal.h>
27	# elif __hpux	86
28	# include <sys/socket.h>	87	#define EIO_STRUCT_STAT Stat_t
29	# elif __solaris /* not yet */	88
30	# include <sys/sendfile.h>	89	#endif
		90
		91	/*****************************************************************************/
		92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
		95	#else
		96	# define expect(expr,value) (expr)
		97	#endif
		98
		99	#define expect_false(expr) expect ((expr) != 0, 0)
		100	#define expect_true(expr) expect ((expr) != 0, 1)
		101
		102	/*****************************************************************************/
		103
		104	typedef SV SV8; /* byte-sv, used for argument-checking */
		105	typedef int aio_rfd; /* read file desriptor */
		106	typedef int aio_wfd; /* write file descriptor */
		107
		108	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		109
		110	#define EIO_REQ_MEMBERS \
		111	SV *callback; \
		112	SV *sv1, *sv2; \
		113	SV *sv3, *sv4; \
		114	STRLEN stroffset; \
		115	SV *self;
		116
		117	#define EIO_NO_WRAPPERS 1
		118
		119	#include "libeio/config.h"
		120	#include "libeio/eio.h"
		121
		122	static int req_invoke (eio_req *req);
		123	#define EIO_FINISH(req) req_invoke (req)
		124	static void req_destroy (eio_req *grp);
		125	#define EIO_DESTROY(req) req_destroy (req)
		126
		127	#include "libeio/eio.c"
		128
		129	#if !HAVE_POSIX_FADVISE
		130	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		131	#endif
		132
		133	#if !HAVE_POSIX_MADVISE
		134	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		135	#endif
		136
		137	#ifndef MAP_ANONYMOUS
		138	# ifdef MAP_ANON
		139	# define MAP_ANONYMOUS MAP_ANON
31	# else	140	# else
32	# error sendfile support requested but not available	141	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
33	# endif	142	# endif
34	#endif	143	#endif
35		144
36	/* used for struct dirent, AIX doesn't provide it */	145	/* defines all sorts of constants to 0 unless they are already defined */
37	#ifndef NAME_MAX	146	#include "def0.h"
38	# define NAME_MAX 4096
39	#endif
40		147
41	#if __ia64	148	#ifndef makedev
42	# define STACKSIZE 65536	149	# define makedev(maj,min) (((maj) << 8) | (min))
43	#else
44	# define STACKSIZE 8192
45	#endif	150	#endif
		151	#ifndef major
		152	# define major(dev) ((dev) >> 8)
		153	#endif
		154	#ifndef minor
		155	# define minor(dev) ((dev) & 0xff)
		156	#endif
46		157
47	enum {	158	#if PAGESIZE <= 0
48	REQ_QUIT,	159	# define PAGESIZE sysconf (_SC_PAGESIZE)
49	REQ_OPEN, REQ_CLOSE,	160	#endif
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	};
58		161
59	typedef struct aio_cb {	162	/*****************************************************************************/
60	struct aio_cb *volatile next;
61
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;
80
81	static int started, wanted;
82	static volatile int nreqs;
83	static int max_outstanding = 1<<30;
84	static int respipe [2];
85
86	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
87	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
88	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
89
90	static volatile aio_req reqs, reqe; /* queue start, queue end */
91	static volatile aio_req ress, rese; /* queue start, queue end */
92
93	static void free_req (aio_req req)
94	{
95	if (req->data)
96	SvREFCNT_dec (req->data);
97
98	if (req->fh)
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		163
116	static void	164	static void
117	poll_wait ()	165	fiemap (eio_req *req)
118	{	166	{
119	if (nreqs && !ress)	167	req->result = -1;
120	{
121	fd_set rfd;
122	FD_ZERO(&rfd);
123	FD_SET(respipe [0], &rfd);
124		168
125	select (respipe [0] + 1, &rfd, 0, 0, 0);	169	#if HAVE_FIEMAP
126	}	170	/* assume some c99 */
127	}	171	struct fiemap *fiemap = 0;
		172	size_t end_offset;
		173	int count = req->int3;
128		174
129	static int	175	req->flags |= EIO_FLAG_PTR1_FREE;
130	poll_cb ()	176
131	{	177	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
132	dSP;	178	/* increase in 3.5kb steps */
		179	if (count < 0)
133	int count = 0;	180	count = 8;
134	int do_croak = 0;	181
135	aio_req req;	182	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		183	errno = ENOMEM;
		184	if (!fiemap)
		185	return;
		186
		187	req->ptr1 = fiemap;
		188
		189	fiemap->fm_start = req->offs;
		190	fiemap->fm_length = req->size;
		191	fiemap->fm_flags = req->int2;
		192	fiemap->fm_extent_count = count;
		193
		194	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
		195	return;
		196
		197	if (req->int3 >= 0 /* not autosizing */
		198	|| !fiemap->fm_mapped_extents /* no more extents */
		199	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
		200	goto done;
		201
		202	/* else we have to loop -
		203	* it would be tempting (actually I tried that first) to just query the
		204	* number of extents needed, but linux often feels like not returning all
		205	* extents, without telling us it left any out. this complicates
		206	* this quite a bit.
		207	*/
		208
		209	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
136		210
137	for (;;)	211	for (;;)
138	{	212	{
139	pthread_mutex_lock (&reslock);	213	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
140	req = ress;	214	char scratch[3072];
		215	struct fiemap *incmap = (struct fiemap *)scratch;
141		216
		217	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
		218	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
		219	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
		220	incmap->fm_flags = fiemap->fm_flags;
		221	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
		222
		223	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
		224	return;
		225
		226	if (!incmap->fm_mapped_extents)
		227	goto done;
		228
		229	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
		230	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		231	errno = ENOMEM;
142	if (req)	232	if (!fiemap)
		233	return;
		234
		235	req->ptr1 = fiemap;
		236
		237	for (count = 0; count < incmap->fm_mapped_extents; ++count)
143	{	238	{
144	ress = req->next;	239	struct fiemap_extent *e = incmap->fm_extents + count;
145		240
146	if (!ress)	241	if (e->fe_logical + e->fe_length >= end_offset)
147	{	242	goto done;
148	/* read any signals sent by the worker threads */
149	char buf [32];
150	while (read (respipe [0], buf, 32) == 32)
151	;
152		243
153	rese = 0;	244	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
154	}
155	}
156		245
157	pthread_mutex_unlock (&reslock);	246	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		247	goto done;
158		248
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	{
189	SV *rv = &PL_sv_undef;
190
191	if (req->result >= 0)
192	{
193	char *buf = req->data2ptr;
194	AV *av = newAV ();
195
196	while (req->result)
197	{
198	SV *sv = newSVpv (buf, 0);
199
200	av_push (av, sv);
201	buf += SvCUR (sv) + 1;
202	req->result--;
203	}
204
205	rv = sv_2mortal (newRV_noinc ((SV *)av));
206	}
207
208	XPUSHs (rv);
209	}
210	else
211	{
212	XPUSHs (sv_2mortal (newSViv (req->result)));
213
214	if (req->type == REQ_OPEN)
215	{
216	/* convert fd to fh */
217	SV *fh;
218
219	PUTBACK;
220	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
221	SPAGAIN;
222
223	fh = SvREFCNT_inc (POPs);
224
225	PUSHMARK (SP);
226	XPUSHs (sv_2mortal (fh));
227	}
228	}
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	}	249	}
551	}	250	}
552		251
553	return res;	252	done:
554	}	253	req->result = 0;
555		254
556	/* read a full directory */	255	#else
		256	errno = ENOSYS;
		257	#endif
		258	}
		259
		260	/*****************************************************************************/
		261
		262	enum {
		263	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		264	};
		265
		266	typedef eio_req *aio_req;
		267	typedef eio_req *aio_req_ornot;
		268	typedef eio_wd aio_wd;
		269
		270	static SV *on_next_submit;
		271	static int next_pri = EIO_PRI_DEFAULT;
		272	static int max_outstanding;
		273
		274	static s_epipe respipe;
		275
		276	static void req_destroy (aio_req req);
		277	static void req_cancel (aio_req req);
		278
		279	static void
		280	want_poll (void)
		281	{
		282	/* write a dummy byte to the pipe so fh becomes ready */
		283	s_epipe_signal (&respipe);
		284	}
		285
		286	static void
		287	done_poll (void)
		288	{
		289	/* read any signals sent by the worker threads */
		290	s_epipe_drain (&respipe);
		291	}
		292
		293	/* must be called at most once */
		294	static SV *
		295	req_sv (aio_req req, HV *stash)
		296	{
		297	if (!req->self)
		298	{
		299	req->self = (SV *)newHV ();
		300	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		301	}
		302
		303	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		304	}
		305
		306	static SV *
		307	newSVaio_wd (aio_wd wd)
		308	{
		309	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		310	}
		311
		312	static aio_req
		313	SvAIO_REQ (SV *sv)
		314	{
		315	MAGIC *mg;
		316
		317	if (!SvROK (sv)
		318	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		319	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		320	&& SvSTASH (SvRV (sv)) != aio_req_stash
		321	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		322	croak ("object of class IO::AIO::REQ expected");
		323
		324	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		325
		326	return mg ? (aio_req)mg->mg_ptr : 0;
		327	}
		328
		329	static aio_wd
		330	SvAIO_WD (SV *sv)
		331	{
		332	if (!SvROK (sv)
		333	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		334	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		335	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		336
		337	return (aio_wd)(long)SvIVX (SvRV (sv));
		338	}
		339
		340	static void
		341	aio_grp_feed (aio_req grp)
		342	{
		343	if (grp->sv2 && SvOK (grp->sv2))
		344	{
		345	dSP;
		346
		347	ENTER;
		348	SAVETMPS;
		349	PUSHMARK (SP);
		350	XPUSHs (req_sv (grp, aio_grp_stash));
		351	PUTBACK;
		352	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		353	SPAGAIN;
		354	FREETMPS;
		355	LEAVE;
		356	}
		357	}
		358
		359	static void
		360	req_submit (eio_req *req)
		361	{
		362	eio_submit (req);
		363
		364	if (expect_false (on_next_submit))
		365	{
		366	dSP;
		367	SV *cb = sv_2mortal (on_next_submit);
		368
		369	on_next_submit = 0;
		370
		371	PUSHMARK (SP);
		372	PUTBACK;
		373	call_sv (cb, G_DISCARD | G_EVAL);
		374	}
		375	}
		376
557	static int	377	static int
558	scandir_ (const char *path, void **namesp)	378	req_invoke (eio_req *req)
559	{	379	{
560	DIR *dirp = opendir (path);	380	if (req->flags & FLAG_SV2_RO_OFF)
561	union	381	SvREADONLY_off (req->sv2);
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		382
573	if (!dirp)	383	if (!EIO_CANCELLED (req) && req->callback)
574	return -1;
575
576	names = malloc (memlen);
577
578	for (;;)
579	{	384	{
580	errno = 0, readdir_r (dirp, &u.d, &entp);	385	dSP;
		386	static SV *sv_result_cache; /* caches the result integer SV */
		387	SV *sv_result;
581		388
582	if (!entp)	389	ENTER;
583	break;	390	SAVETMPS;
		391	PUSHMARK (SP);
		392	EXTEND (SP, 1);
584		393
585	name = entp->d_name;	394	/* do not recreate the result IV from scratch each time */
586		395	if (expect_true (sv_result_cache))
587	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
588	{	396	{
589	int len = strlen (name) + 1;	397	sv_result = sv_result_cache; sv_result_cache = 0;
590		398	SvIV_set (sv_result, req->result);
591	res++;	399	SvIOK_only (sv_result);
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;
644
645	pthread_cond_wait (&reqwait, &reqlock);
646	}
647
648	pthread_mutex_unlock (&reqlock);
649
650	errno = 0; /* strictly unnecessary */
651
652	type = req->type;
653
654	switch (type)
655	{
656	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
657	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
658
659	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
660	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
661
662	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
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;
678
679	default:
680	req->result = ENOSYS;
681	break;
682	}
683
684	req->errorno = errno;
685
686	pthread_mutex_lock (&reslock);
687
688	req->next = 0;
689
690	if (rese)
691	{
692	rese->next = req;
693	rese = req;
694	}	400	}
695	else	401	else
696	{	402	{
697	rese = ress = req;	403	sv_result = newSViv (req->result);
698		404	SvREADONLY_on (sv_result);
699	/* write a dummy byte to the pipe so fh becomes ready */
700	write (respipe [1], &respipe, 1);
701	}	405	}
702		406
703	pthread_mutex_unlock (&reslock);	407	switch (req->type)
		408	{
		409	case EIO_WD_OPEN:
		410	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		411	break;
		412
		413	case EIO_READDIR:
		414	{
		415	SV *rv = &PL_sv_undef;
		416
		417	if (req->result >= 0)
		418	{
		419	int i;
		420	char *names = (char *)req->ptr2;
		421	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		422	AV *av = newAV ();
		423
		424	av_extend (av, req->result - 1);
		425
		426	for (i = 0; i < req->result; ++i)
		427	{
		428	if (req->int1 & EIO_READDIR_DENTS)
		429	{
		430	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		431
		432	if (req->int1 & EIO_READDIR_CUSTOM2)
		433	{
		434	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		435	AV *avent = newAV ();
		436
		437	av_extend (avent, 2);
		438
		439	if (!sv_type [ent->type])
		440	{
		441	sv_type [ent->type] = newSViv (ent->type);
		442	SvREADONLY_on (sv_type [ent->type]);
		443	}
		444
		445	av_store (avent, 0, namesv);
		446	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		447	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		448
		449	av_store (av, i, newRV_noinc ((SV *)avent));
		450	}
		451	else
		452	av_store (av, i, namesv);
		453
		454	++ent;
		455	}
		456	else
		457	{
		458	SV *name = newSVpv (names, 0);
		459	av_store (av, i, name);
		460	names += SvCUR (name) + 1;
		461	}
		462	}
		463
		464	rv = sv_2mortal (newRV_noinc ((SV *)av));
		465	}
		466
		467	PUSHs (rv);
		468
		469	if (req->int1 & EIO_READDIR_CUSTOM1)
		470	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		471	}
		472	break;
		473
		474	case EIO_OPEN:
		475	{
		476	/* convert fd to fh */
		477	SV *fh = &PL_sv_undef;
		478
		479	if (req->result >= 0)
		480	{
		481	GV *gv = (GV *)sv_newmortal ();
		482	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		483	char sym [64];
		484	int symlen;
		485
		486	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		487	gv_init (gv, aio_stash, sym, symlen, 0);
		488
		489	symlen = snprintf (
		490	sym,
		491	sizeof (sym),
		492	"%s&=%d",
		493	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		494	(int)req->result
		495	);
		496
		497	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		498	fh = (SV *)gv;
		499	}
		500
		501	PUSHs (fh);
		502	}
		503	break;
		504
		505	case EIO_STATVFS:
		506	case EIO_FSTATVFS:
		507	{
		508	SV *rv = &PL_sv_undef;
		509
		510	#ifndef _WIN32
		511	if (req->result >= 0)
		512	{
		513	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		514	HV *hv = newHV ();
		515	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		516	* chooses to make it a struct.
		517	*/
		518	unsigned long fsid = 0;
		519	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
		520
		521	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		522
		523	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		524	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		525	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		526	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		527	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		528	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		529	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		530	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		531	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		532	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		533	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		534	}
		535	#endif
		536
		537	PUSHs (rv);
		538	}
		539
		540	break;
		541
		542	case EIO_GROUP:
		543	req->int1 = 2; /* mark group as finished */
		544
		545	if (req->sv1)
		546	{
		547	int i;
		548	AV *av = (AV *)req->sv1;
		549
		550	EXTEND (SP, AvFILL (av) + 1);
		551	for (i = 0; i <= AvFILL (av); ++i)
		552	PUSHs (*av_fetch (av, i, 0));
		553	}
		554	break;
		555
		556	case EIO_NOP:
		557	case EIO_BUSY:
		558	break;
		559
		560	case EIO_READLINK:
		561	case EIO_REALPATH:
		562	if (req->result > 0)
		563	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		564	break;
		565
		566	case EIO_STAT:
		567	case EIO_LSTAT:
		568	case EIO_FSTAT:
		569	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		570
		571	if (!(PL_laststatval = req->result))
		572	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		573	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		574
		575	PUSHs (sv_result);
		576	break;
		577
		578	case EIO_SEEK:
		579	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		580	break;
		581
		582	case EIO_READ:
		583	{
		584	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		585	*SvEND (req->sv2) = 0;
		586	SvPOK_only (req->sv2);
		587	SvSETMAGIC (req->sv2);
		588	PUSHs (sv_result);
		589	}
		590	break;
		591
		592	case EIO_CUSTOM:
		593	if (req->feed == fiemap)
		594	{
		595	#if HAVE_FIEMAP
		596	if (!req->result)
		597	{
		598	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		599
		600	if (fiemap->fm_extent_count)
		601	{
		602	AV *av = newAV ();
		603	int i;
		604
		605	while (fiemap->fm_mapped_extents)
		606	{
		607	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		608	AV *ext_av = newAV ();
		609
		610	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		611	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		612	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		613	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		614
		615	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		616	}
		617
		618	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		619	}
		620	else
		621	{
		622	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		623	PUSHs (sv_result);
		624	}
		625	}
		626	#endif
		627	}
		628	else
		629	PUSHs (sv_result);
		630	break;
		631
		632	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		633	if (req->result > 0)
		634	SvIV_set (sv_result, 0);
		635	/* FALLTHROUGH */
		636
		637	default:
		638	PUSHs (sv_result);
		639	break;
		640	}
		641
		642	errno = req->errorno;
		643
		644	PUTBACK;
		645	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		646	SPAGAIN;
		647
		648	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		649	SvREFCNT_dec (sv_result);
		650	else
		651	sv_result_cache = sv_result;
		652
		653	FREETMPS;
		654	LEAVE;
		655
		656	PUTBACK;
704	}	657	}
705	while (type != REQ_QUIT);	658
		659	return !!SvTRUE (ERRSV);
		660	}
		661
		662	static void
		663	req_destroy (aio_req req)
		664	{
		665	if (req->self)
		666	{
		667	sv_unmagic (req->self, PERL_MAGIC_ext);
		668	SvREFCNT_dec (req->self);
		669	}
		670
		671	SvREFCNT_dec (req->sv1);
		672	SvREFCNT_dec (req->sv2);
		673	SvREFCNT_dec (req->sv3);
		674	SvREFCNT_dec (req->sv4);
		675	SvREFCNT_dec (req->callback);
		676
		677	free (req);
		678	}
		679
		680	static void
		681	req_cancel_subs (aio_req grp)
		682	{
		683	if (grp->type != EIO_GROUP)
		684	return;
		685
		686	SvREFCNT_dec (grp->sv2);
		687	grp->sv2 = 0;
		688
		689	eio_grp_cancel (grp);
		690	}
		691
		692	static void ecb_cold
		693	create_respipe (void)
		694	{
		695	if (s_epipe_renew (&respipe))
		696	croak ("IO::AIO: unable to initialize result pipe");
		697	}
		698
		699	static void
		700	poll_wait (void)
		701	{
		702	while (eio_nreqs ())
		703	{
		704	int size;
		705
		706	X_LOCK (reslock);
		707	size = res_queue.size;
		708	X_UNLOCK (reslock);
		709
		710	if (size)
		711	return;
		712
		713	etp_maybe_start_thread ();
		714
		715	s_epipe_wait (&respipe);
		716	}
		717	}
		718
		719	static int
		720	poll_cb (void)
		721	{
		722	for (;;)
		723	{
		724	int res = eio_poll ();
		725
		726	if (res > 0)
		727	croak (0);
		728
		729	if (!max_outstanding || max_outstanding > eio_nreqs ())
		730	return res;
		731
		732	poll_wait ();
		733	}
		734	}
		735
		736	static void ecb_cold
		737	reinit (void)
		738	{
		739	create_respipe ();
		740
		741	if (eio_init (want_poll, done_poll) < 0)
		742	croak ("IO::AIO: unable to initialise eio library");
		743	}
		744
		745	/*****************************************************************************/
		746
		747	#if !_POSIX_MAPPED_FILES
		748	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		749	# define munmap(addr,length) EIO_ENOSYS ()
		750	#endif
		751
		752	#if !_POSIX_MEMORY_PROTECTION
		753	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		754	# define PROT_NONE 0
		755	# define PROT_WRITE 0
		756	# define MAP_PRIVATE 0
		757	# define MAP_SHARED 0
		758	# define MAP_FIXED 0
		759	#endif
		760
		761	#define MMAP_MAGIC PERL_MAGIC_ext
		762
		763	static int ecb_cold
		764	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		765	{
		766	int old_errno = errno;
		767	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		768	errno = old_errno;
		769
		770	mg->mg_obj = 0; /* just in case */
		771
		772	SvREADONLY_off (sv);
		773
		774	if (SvPVX (sv) != mg->mg_ptr)
		775	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		776
		777	SvCUR_set (sv, 0);
		778	SvPVX (sv) = 0;
		779	SvOK_off (sv);
706		780
707	return 0;	781	return 0;
708	}	782	}
709		783
		784	static MGVTBL mmap_vtbl = {
		785	0, 0, 0, 0, mmap_free
		786	};
		787
710	/*****************************************************************************/	788	/*****************************************************************************/
711		789
712	static void atfork_prepare (void)	790	static SV *
		791	get_cb (SV *cb_sv)
713	{	792	{
714	pthread_mutex_lock (&reqlock);	793	SvGETMAGIC (cb_sv);
715	pthread_mutex_lock (&reslock);	794	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
716	#if !HAVE_PREADWRITE
717	pthread_mutex_lock (&preadwritelock);
718	#endif
719	#if !HAVE_READDIR_R
720	pthread_mutex_lock (&readdirlock);
721	#endif
722	}	795	}
723		796
724	static void atfork_parent (void)	797	static aio_req ecb_noinline
		798	dreq (SV *callback)
725	{	799	{
726	#if !HAVE_READDIR_R	800	SV *cb_cv;
727	pthread_mutex_unlock (&readdirlock);
728	#endif
729	#if !HAVE_PREADWRITE
730	pthread_mutex_unlock (&preadwritelock);
731	#endif
732	pthread_mutex_unlock (&reslock);
733	pthread_mutex_unlock (&reqlock);
734	}
735
736	static void atfork_child (void)
737	{
738	aio_req prv;	801	aio_req req;
		802	int req_pri = next_pri;
		803	next_pri = EIO_PRI_DEFAULT;
739		804
740	started = 0;	805	cb_cv = get_cb (callback);
741		806
742	while (reqs)	807	req = calloc (sizeof (*req), 1);
		808	if (!req)
		809	croak ("out of memory during eio_req allocation");
		810
		811	req->callback = SvREFCNT_inc (cb_cv);
		812	req->pri = req_pri;
		813
		814	return req;
		815	}
		816
		817	#define dREQ \
		818	aio_req req = dreq (callback); \
		819
		820	#define REQ_SEND \
		821	PUTBACK; \
		822	req_submit (req); \
		823	SPAGAIN; \
		824	\
		825	if (GIMME_V != G_VOID) \
		826	XPUSHs (req_sv (req, aio_req_stash));
		827
		828	ecb_inline void
		829	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		830	{
		831	if (expect_false (SvROK (path)))
743	{	832	{
744	prv = reqs;	833	SV *rv = SvRV (path);
745	reqs = prv->next;	834	SV *wdob;
746	free_req (prv);	835
		836	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
		837	{
		838	path = AvARRAY (rv)[1];
		839	wdob = AvARRAY (rv)[0];
		840
		841	if (SvOK (wdob))
		842	{
		843	*wd = SvAIO_WD (wdob);
		844	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		845	}
		846	else
		847	*wd = EIO_INVALID_WD;
		848	}
		849	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		850	{
		851	*wd = (aio_wd)(long)SvIVX (rv);
		852	*wdsv = SvREFCNT_inc_NN (rv);
		853	*ptr = ".";
		854	return; /* path set to "." */
		855	}
		856	else
		857	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
747	}	858	}
748		859
749	reqs = reqe = 0;	860	*pathsv = newSVsv (path);
750		861	*ptr = SvPVbyte_nolen (*pathsv);
751	while (ress)	862	}
		863
		864	static void ecb_noinline
		865	req_set_path1 (aio_req req, SV *path)
		866	{
		867	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		868	}
		869
		870	static void ecb_noinline
		871	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		872	{
		873	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		874
		875	switch (SvTYPE (rv))
752	{	876	{
753	prv = ress;	877	case SVt_PVIO:
754	ress = prv->next;	878	case SVt_PVLV:
755	free_req (prv);	879	case SVt_PVGV:
		880	req->type = type_fh;
		881	req->sv1 = newSVsv (fh_or_path);
		882	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		883	break;
		884
		885	default:
		886	req->type = type_path;
		887	req_set_path1 (req, fh_or_path);
		888	break;
756	}	889	}
757
758	ress = rese = 0;
759
760	close (respipe [0]);
761	close (respipe [1]);
762	create_pipe ();
763
764	atfork_parent ();
765	}	890	}
766		891
767	#define dREQ \	892	XS(boot_IO__AIO) ecb_cold;
768	aio_req req; \	893
769	\
770	if (SvOK (callback) && !SvROK (callback)) \
771	croak ("clalback must be undef or of reference type"); \
772	\
773	Newz (0, req, 1, aio_cb); \
774	if (!req) \
775	croak ("out of memory during aio_req allocation"); \
776	\
777	req->callback = newSVsv (callback);
778
779	MODULE = IO::AIO PACKAGE = IO::AIO	894	MODULE = IO::AIO PACKAGE = IO::AIO
780		895
781	PROTOTYPES: ENABLE	896	PROTOTYPES: ENABLE
782		897
783	BOOT:	898	BOOT:
784	{	899	{
785	create_pipe ();	900	static const struct {
786	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	901	const char *name;
787	}	902	IV iv;
		903	} *civ, const_iv[] = {
		904	# define const_niv(name, value) { # name, (IV) value },
		905	# define const_iv(name) { # name, (IV) name },
		906	# define const_eio(name) { # name, (IV) EIO_ ## name },
788		907
		908	/* you have to re-run ./gendef0 after adding/Removing any constants here */
		909
		910	const_iv (ENOSYS)
		911	const_iv (EXDEV)
		912	const_iv (EBADR)
		913
		914	const_iv (O_RDONLY)
		915	const_iv (O_WRONLY)
		916	const_iv (O_RDWR)
		917	const_iv (O_CREAT)
		918	const_iv (O_TRUNC)
		919	const_iv (O_EXCL)
		920	const_iv (O_APPEND)
		921
		922	const_iv (O_ASYNC)
		923	const_iv (O_DIRECT)
		924	const_iv (O_NOATIME)
		925
		926	const_iv (O_CLOEXEC)
		927	const_iv (O_NOCTTY)
		928	const_iv (O_NOFOLLOW)
		929	const_iv (O_NONBLOCK)
		930	const_iv (O_EXEC)
		931	const_iv (O_SEARCH)
		932	const_iv (O_DIRECTORY)
		933	const_iv (O_DSYNC)
		934	const_iv (O_RSYNC)
		935	const_iv (O_SYNC)
		936	const_iv (O_TTY_INIT)
		937
		938	const_iv (S_IFIFO)
		939	const_iv (S_IFCHR)
		940	const_iv (S_IFBLK)
		941	const_iv (S_IFLNK)
		942	const_iv (S_IFREG)
		943	const_iv (S_IFDIR)
		944	const_iv (S_IFWHT)
		945	const_iv (S_IFSOCK)
		946	const_iv (S_IFMT)
		947
		948	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		949	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		950	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		951	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		952	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		953	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		954
		955	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		956	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		957	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		958	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		959	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		960
		961	const_iv (ST_RDONLY)
		962	const_iv (ST_NOSUID)
		963	const_iv (ST_NODEV)
		964	const_iv (ST_NOEXEC)
		965	const_iv (ST_SYNCHRONOUS)
		966	const_iv (ST_MANDLOCK)
		967	const_iv (ST_WRITE)
		968	const_iv (ST_APPEND)
		969	const_iv (ST_IMMUTABLE)
		970	const_iv (ST_NOATIME)
		971	const_iv (ST_NODIRATIME)
		972	const_iv (ST_RELATIME)
		973
		974	const_iv (PROT_NONE)
		975	const_iv (PROT_EXEC)
		976	const_iv (PROT_READ)
		977	const_iv (PROT_WRITE)
		978
		979	/*const_iv (MAP_FIXED)*/
		980	const_iv (MAP_PRIVATE)
		981	const_iv (MAP_SHARED)
		982	const_iv (MAP_ANONYMOUS)
		983
		984	/* linuxish */
		985	const_iv (MAP_HUGETLB)
		986	const_iv (MAP_LOCKED)
		987	const_iv (MAP_NORESERVE)
		988	const_iv (MAP_POPULATE)
		989	const_iv (MAP_NONBLOCK)
		990
		991	const_iv (FIEMAP_FLAG_SYNC)
		992	const_iv (FIEMAP_FLAG_XATTR)
		993	const_iv (FIEMAP_FLAGS_COMPAT)
		994	const_iv (FIEMAP_EXTENT_LAST)
		995	const_iv (FIEMAP_EXTENT_UNKNOWN)
		996	const_iv (FIEMAP_EXTENT_DELALLOC)
		997	const_iv (FIEMAP_EXTENT_ENCODED)
		998	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		999	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1000	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1001	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1002	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1003	const_iv (FIEMAP_EXTENT_MERGED)
		1004	const_iv (FIEMAP_EXTENT_SHARED)
		1005
		1006	const_iv (SPLICE_F_MOVE)
		1007	const_iv (SPLICE_F_NONBLOCK)
		1008	const_iv (SPLICE_F_MORE)
		1009	const_iv (SPLICE_F_GIFT)
		1010
		1011	const_iv (SEEK_DATA)
		1012	const_iv (SEEK_HOLE)
		1013
		1014	/* libeio constants */
		1015	const_eio (SEEK_SET)
		1016	const_eio (SEEK_CUR)
		1017	const_eio (SEEK_END)
		1018
		1019	const_eio (MCL_FUTURE)
		1020	const_eio (MCL_CURRENT)
		1021
		1022	const_eio (MS_ASYNC)
		1023	const_eio (MS_INVALIDATE)
		1024	const_eio (MS_SYNC)
		1025
		1026	const_eio (MT_MODIFY)
		1027
		1028	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1029	const_eio (SYNC_FILE_RANGE_WRITE)
		1030	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1031
		1032	const_eio (FALLOC_FL_KEEP_SIZE)
		1033	const_eio (FALLOC_FL_PUNCH_HOLE)
		1034
		1035	const_eio (READDIR_DENTS)
		1036	const_eio (READDIR_DIRS_FIRST)
		1037	const_eio (READDIR_STAT_ORDER)
		1038	const_eio (READDIR_FOUND_UNKNOWN)
		1039
		1040	const_eio (DT_UNKNOWN)
		1041	const_eio (DT_FIFO)
		1042	const_eio (DT_CHR)
		1043	const_eio (DT_DIR)
		1044	const_eio (DT_BLK)
		1045	const_eio (DT_REG)
		1046	const_eio (DT_LNK)
		1047	const_eio (DT_SOCK)
		1048	const_eio (DT_WHT)
		1049	};
		1050
		1051	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1052	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1053	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1054	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
		1055
		1056	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
		1057	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
		1058
		1059	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1060
		1061	reinit ();
		1062	}
		1063
789	void	1064	void
790	min_parallel(nthreads)	1065	reinit ()
791	int nthreads	1066	PROTOTYPE:
		1067
		1068	void
		1069	max_poll_reqs (unsigned int nreqs)
792	PROTOTYPE: $	1070	PROTOTYPE: $
		1071	CODE:
		1072	eio_set_max_poll_reqs (nreqs);
793		1073
794	void	1074	void
795	max_parallel(nthreads)	1075	max_poll_time (double nseconds)
796	int nthreads
797	PROTOTYPE: $	1076	PROTOTYPE: $
798
799	int
800	max_outstanding(nreqs)
801	int nreqs
802	PROTOTYPE: $
803	CODE:	1077	CODE:
804	RETVAL = max_outstanding;	1078	eio_set_max_poll_time (nseconds);
		1079
		1080	void
		1081	min_parallel (unsigned int nthreads)
		1082	PROTOTYPE: $
		1083	CODE:
		1084	eio_set_min_parallel (nthreads);
		1085
		1086	void
		1087	max_parallel (unsigned int nthreads)
		1088	PROTOTYPE: $
		1089	CODE:
		1090	eio_set_max_parallel (nthreads);
		1091
		1092	void
		1093	max_idle (unsigned int nthreads)
		1094	PROTOTYPE: $
		1095	CODE:
		1096	eio_set_max_idle (nthreads);
		1097
		1098	void
		1099	idle_timeout (unsigned int seconds)
		1100	PROTOTYPE: $
		1101	CODE:
		1102	eio_set_idle_timeout (seconds);
		1103
		1104	void
		1105	max_outstanding (unsigned int maxreqs)
		1106	PROTOTYPE: $
		1107	CODE:
805	max_outstanding = nreqs;	1108	max_outstanding = maxreqs;
806		1109
807	void	1110	void
808	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1111	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
809	SV * pathname
810	int flags
811	int mode
812	SV * callback
813	PROTOTYPE: $$$;$
814	CODE:	1112	PPCODE:
815	{	1113	{
816	dREQ;	1114	dREQ;
817		1115
		1116	req->type = EIO_WD_OPEN;
		1117	req_set_path1 (req, pathname);
		1118
		1119	REQ_SEND;
		1120	}
		1121
		1122	void
		1123	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1124	PPCODE:
		1125	{
		1126	dREQ;
		1127
818	req->type = REQ_OPEN;	1128	req->type = EIO_OPEN;
819	req->data = newSVsv (pathname);	1129	req_set_path1 (req, pathname);
820	req->dataptr = SvPVbyte_nolen (req->data);
821	req->fd = flags;	1130	req->int1 = flags;
822	req->mode = mode;	1131	req->int2 = mode;
823		1132
824	send_req (req);	1133	REQ_SEND;
825	}	1134	}
826		1135
827	void	1136	void
828	aio_close(fh,callback=&PL_sv_undef)	1137	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
829	SV * fh
830	SV * callback
831	PROTOTYPE: $;$
832	ALIAS:	1138	ALIAS:
833	aio_close = REQ_CLOSE
834	aio_fsync = REQ_FSYNC	1139	aio_fsync = EIO_FSYNC
835	aio_fdatasync = REQ_FDATASYNC	1140	aio_fdatasync = EIO_FDATASYNC
		1141	aio_syncfs = EIO_SYNCFS
836	CODE:	1142	PPCODE:
837	{	1143	{
		1144	int fd = s_fileno_croak (fh, 0);
838	dREQ;	1145	dREQ;
839		1146
840	req->type = ix;	1147	req->type = ix;
841	req->fh = newSVsv (fh);	1148	req->sv1 = newSVsv (fh);
842	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1149	req->int1 = fd;
843		1150
844	send_req (req);	1151	REQ_SEND;
845	}	1152	}
846		1153
847	void	1154	void
		1155	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1156	PPCODE:
		1157	{
		1158	int fd = s_fileno_croak (fh, 0);
		1159	dREQ;
		1160
		1161	req->type = EIO_SYNC_FILE_RANGE;
		1162	req->sv1 = newSVsv (fh);
		1163	req->int1 = fd;
		1164	req->offs = offset;
		1165	req->size = nbytes;
		1166	req->int2 = flags;
		1167
		1168	REQ_SEND;
		1169	}
		1170
		1171	void
		1172	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1173	PPCODE:
		1174	{
		1175	int fd = s_fileno_croak (fh, 0);
		1176	dREQ;
		1177
		1178	req->type = EIO_FALLOCATE;
		1179	req->sv1 = newSVsv (fh);
		1180	req->int1 = fd;
		1181	req->int2 = mode;
		1182	req->offs = offset;
		1183	req->size = len;
		1184
		1185	REQ_SEND;
		1186	}
		1187
		1188	void
		1189	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1190	PPCODE:
		1191	{
		1192	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1193	int fd = s_fileno_croak (fh, 0);
		1194	dREQ;
		1195
		1196	if (expect_false (close_fd < 0))
		1197	{
		1198	int pipefd [2];
		1199
		1200	if (
		1201	#ifdef _WIN32
		1202	_pipe (pipefd, 1, _O_BINARY) < 0
		1203	#else
		1204	pipe (pipefd) < 0
		1205	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1206	#endif
		1207	|| close (pipefd [1]) < 0
		1208	)
		1209	abort (); /*D*/
		1210
		1211	close_fd = pipefd [0];
		1212	}
		1213
		1214	req->type = EIO_DUP2;
		1215	req->int1 = close_fd;
		1216	req->sv2 = newSVsv (fh);
		1217	req->int2 = fd;
		1218
		1219	REQ_SEND;
		1220	}
		1221
		1222	void
		1223	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
		1224	PPCODE:
		1225	{
		1226	int fd = s_fileno_croak (fh, 0);
		1227	dREQ;
		1228
		1229	req->type = EIO_SEEK;
		1230	req->sv1 = newSVsv (fh);
		1231	req->int1 = fd;
		1232	req->offs = SvVAL64 (offset);
		1233	req->int2 = whence;
		1234
		1235	REQ_SEND;
		1236	}
		1237
		1238	void
848	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1239	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:	1240	ALIAS:
856	aio_read = REQ_READ	1241	aio_read = EIO_READ
857	aio_write = REQ_WRITE	1242	aio_write = EIO_WRITE
858	PROTOTYPE: $$$$$;$
859	CODE:	1243	PPCODE:
860	{	1244	{
861	aio_req req;
862	STRLEN svlen;	1245	STRLEN svlen;
		1246	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
863	char *svptr = SvPVbyte (data, svlen);	1247	char *svptr = SvPVbyte (data, svlen);
864		1248	UV len = SvUV (length);
865	SvUPGRADE (data, SVt_PV);
866	SvPOK_on (data);
867		1249
868	if (dataoffset < 0)	1250	if (dataoffset < 0)
869	dataoffset += svlen;	1251	dataoffset += svlen;
870		1252
871	if (dataoffset < 0 || dataoffset > svlen)	1253	if (dataoffset < 0 || dataoffset > svlen)
872	croak ("data offset outside of string");	1254	croak ("dataoffset outside of data scalar");
873		1255
874	if (ix == REQ_WRITE)	1256	if (ix == EIO_WRITE)
875	{	1257	{
876	/* write: check length and adjust. */	1258	/* write: check length and adjust. */
877	if (length < 0 || length + dataoffset > svlen)	1259	if (!SvOK (length) || len + dataoffset > svlen)
878	length = svlen - dataoffset;	1260	len = svlen - dataoffset;
879	}	1261	}
880	else	1262	else
881	{	1263	{
882	/* read: grow scalar as necessary */	1264	/* read: check type and grow scalar as necessary */
		1265	SvUPGRADE (data, SVt_PV);
		1266	if (SvLEN (data) >= SvCUR (data))
883	svptr = SvGROW (data, length + dataoffset);	1267	svptr = SvGROW (data, len + dataoffset + 1);
		1268	else if (SvCUR (data) < len + dataoffset)
		1269	croak ("length + dataoffset outside of scalar, and cannot grow");
884	}	1270	}
885
886	if (length < 0)
887	croak ("length must not be negative");
888		1271
889	{	1272	{
890	dREQ;	1273	dREQ;
891		1274
892	req->type = ix;	1275	req->type = ix;
893	req->fh = newSVsv (fh);	1276	req->sv1 = newSVsv (fh);
894	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1277	req->int1 = fd;
895	: IoOFP (sv_2io (fh)));	1278	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
896	req->offset = offset;	1279	req->size = len;
897	req->length = length;
898	req->data = SvREFCNT_inc (data);	1280	req->sv2 = SvREFCNT_inc (data);
899	req->dataptr = (char *)svptr + dataoffset;	1281	req->ptr2 = (char *)svptr + dataoffset;
		1282	req->stroffset = dataoffset;
900		1283
901	if (!SvREADONLY (data))	1284	if (!SvREADONLY (data))
902	{	1285	{
903	SvREADONLY_on (data);	1286	SvREADONLY_on (data);
904	req->data2ptr = (void *)data;	1287	req->flags |= FLAG_SV2_RO_OFF;
905	}	1288	}
906		1289
907	send_req (req);	1290	REQ_SEND;
908	}	1291	}
909	}	1292	}
910		1293
911	void	1294	void
912	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1295	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
913	SV * out_fh	1296	ALIAS:
914	SV * in_fh	1297	aio_readlink = EIO_READLINK
915	UV in_offset	1298	aio_realpath = EIO_REALPATH
916	UV length
917	SV * callback
918	PROTOTYPE: $$$$;$
919	CODE:	1299	PPCODE:
920	{	1300	{
		1301	dREQ;
		1302
		1303	req->type = ix;
		1304	req_set_path1 (req, pathname);
		1305
		1306	REQ_SEND;
		1307	}
		1308
		1309	void
		1310	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1311	PPCODE:
		1312	{
		1313	int ifd = s_fileno_croak (in_fh , 0);
		1314	int ofd = s_fileno_croak (out_fh, 1);
921	dREQ;	1315	dREQ;
922		1316
923	req->type = REQ_SENDFILE;	1317	req->type = EIO_SENDFILE;
924	req->fh = newSVsv (out_fh);	1318	req->sv1 = newSVsv (out_fh);
925	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1319	req->int1 = ofd;
926	req->fh2 = newSVsv (in_fh);	1320	req->sv2 = newSVsv (in_fh);
927	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1321	req->int2 = ifd;
928	req->offset = in_offset;	1322	req->offs = in_offset;
929	req->length = length;	1323	req->size = length;
930		1324
931	send_req (req);	1325	REQ_SEND;
932	}	1326	}
933		1327
934	void	1328	void
935	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1329	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
936	SV * fh
937	UV offset
938	IV length
939	SV * callback
940	PROTOTYPE: $$$;$
941	CODE:	1330	PPCODE:
942	{	1331	{
		1332	int fd = s_fileno_croak (fh, 0);
943	dREQ;	1333	dREQ;
944		1334
945	req->type = REQ_READAHEAD;	1335	req->type = EIO_READAHEAD;
946	req->fh = newSVsv (fh);	1336	req->sv1 = newSVsv (fh);
947	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1337	req->int1 = fd;
948	req->offset = offset;	1338	req->offs = offset;
949	req->length = length;	1339	req->size = length;
950		1340
951	send_req (req);	1341	REQ_SEND;
952	}	1342	}
953		1343
954	void	1344	void
955	aio_stat(fh_or_path,callback=&PL_sv_undef)	1345	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
956	SV * fh_or_path
957	SV * callback
958	ALIAS:	1346	ALIAS:
959	aio_stat = REQ_STAT	1347	aio_stat = EIO_STAT
960	aio_lstat = REQ_LSTAT	1348	aio_lstat = EIO_LSTAT
		1349	aio_statvfs = EIO_STATVFS
		1350	PPCODE:
		1351	{
		1352	dREQ;
		1353
		1354	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1355
		1356	REQ_SEND;
		1357	}
		1358
		1359	UV
		1360	major (UV dev)
		1361	ALIAS:
		1362	minor = 1
961	CODE:	1363	CODE:
		1364	RETVAL = ix ? major (dev) : minor (dev);
		1365	OUTPUT:
		1366	RETVAL
		1367
		1368	UV
		1369	makedev (UV maj, UV min)
		1370	CODE:
		1371	RETVAL = makedev (maj, min);
		1372	OUTPUT:
		1373	RETVAL
		1374
		1375	void
		1376	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1377	PPCODE:
962	{	1378	{
963	dREQ;	1379	dREQ;
964		1380
965	New (0, req->statdata, 1, Stat_t);	1381	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
966	if (!req->statdata)	1382	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
967	{	1383	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
968	free_req (req);
969	croak ("out of memory during aio_req->statdata allocation");
970	}
971		1384
972	if (SvPOK (fh_or_path))	1385	REQ_SEND;
973	{
974	req->type = ix;
975	req->data = newSVsv (fh_or_path);
976	req->dataptr = SvPVbyte_nolen (req->data);
977	}
978	else
979	{
980	req->type = REQ_FSTAT;
981	req->fh = newSVsv (fh_or_path);
982	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
983	}
984
985	send_req (req);
986	}	1386	}
987		1387
988	void	1388	void
		1389	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1390	PPCODE:
		1391	{
		1392	dREQ;
		1393
		1394	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1395	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1396
		1397	REQ_SEND;
		1398	}
		1399
		1400	void
		1401	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1402	PPCODE:
		1403	{
		1404	dREQ;
		1405
		1406	req->int2 = mode;
		1407	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1408
		1409	REQ_SEND;
		1410	}
		1411
		1412	void
		1413	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1414	PPCODE:
		1415	{
		1416	dREQ;
		1417
		1418	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1419	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1420	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1421
		1422	REQ_SEND;
		1423	}
		1424
		1425	void
		1426	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1427	PPCODE:
		1428	{
		1429	dREQ;
		1430
		1431	req->type = EIO_READDIR;
		1432	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1433
		1434	if (flags & EIO_READDIR_DENTS)
		1435	req->int1 |= EIO_READDIR_CUSTOM2;
		1436
		1437	req_set_path1 (req, pathname);
		1438
		1439	REQ_SEND;
		1440	}
		1441
		1442	void
		1443	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1444	PPCODE:
		1445	{
		1446	dREQ;
		1447
		1448	req->type = EIO_MKDIR;
		1449	req->int2 = mode;
		1450	req_set_path1 (req, pathname);
		1451
		1452	REQ_SEND;
		1453	}
		1454
		1455	void
989	aio_unlink(pathname,callback=&PL_sv_undef)	1456	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
990	SV * pathname
991	SV * callback
992	ALIAS:	1457	ALIAS:
993	aio_unlink = REQ_UNLINK	1458	aio_unlink = EIO_UNLINK
994	aio_rmdir = REQ_RMDIR	1459	aio_rmdir = EIO_RMDIR
		1460	aio_readdir = EIO_READDIR
995	CODE:	1461	PPCODE:
996	{	1462	{
997	dREQ;	1463	dREQ;
998		1464
999	req->type = ix;	1465	req->type = ix;
1000	req->data = newSVsv (pathname);	1466	req_set_path1 (req, pathname);
1001	req->dataptr = SvPVbyte_nolen (req->data);
1002
1003	send_req (req);
1004	}
1005		1467
		1468	REQ_SEND;
		1469	}
		1470
1006	void	1471	void
1007	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1472	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1008	SV * oldpath	1473	ALIAS:
1009	SV * newpath	1474	aio_link = EIO_LINK
1010	SV * callback	1475	aio_symlink = EIO_SYMLINK
		1476	aio_rename = EIO_RENAME
1011	CODE:	1477	PPCODE:
1012	{	1478	{
		1479	eio_wd wd2 = 0;
1013	dREQ;	1480	dREQ;
1014		1481
1015	req->type = REQ_SYMLINK;	1482	req->type = ix;
1016	req->fh = newSVsv (oldpath);	1483	req_set_path1 (req, oldpath);
1017	req->data2ptr = SvPVbyte_nolen (req->fh);	1484	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1018	req->data = newSVsv (newpath);	1485	req->int3 = (long)wd2;
1019	req->dataptr = SvPVbyte_nolen (req->data);
1020		1486
1021	send_req (req);	1487	REQ_SEND;
1022	}	1488	}
1023		1489
1024	void	1490	void
1025	aio_readdir(pathname,callback=&PL_sv_undef)	1491	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1026	SV * pathname
1027	SV * callback
1028	CODE:	1492	PPCODE:
1029	{	1493	{
1030	dREQ;	1494	dREQ;
1031		1495
1032	req->type = REQ_READDIR;	1496	req->type = EIO_MKNOD;
1033	req->data = newSVsv (pathname);	1497	req->int2 = (mode_t)mode;
1034	req->dataptr = SvPVbyte_nolen (req->data);	1498	req->offs = dev;
		1499	req_set_path1 (req, pathname);
1035		1500
1036	send_req (req);	1501	REQ_SEND;
1037	}	1502	}
1038		1503
1039	void	1504	void
1040	flush()	1505	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1041	PROTOTYPE:	1506	ALIAS:
		1507	aio_mtouch = EIO_MTOUCH
		1508	aio_msync = EIO_MSYNC
		1509	PPCODE:
		1510	{
		1511	STRLEN svlen;
		1512	char *svptr = SvPVbyte (data, svlen);
		1513	UV len = SvUV (length);
		1514
		1515	if (offset < 0)
		1516	offset += svlen;
		1517
		1518	if (offset < 0 || offset > svlen)
		1519	croak ("offset outside of scalar");
		1520
		1521	if (!SvOK (length) || len + offset > svlen)
		1522	len = svlen - offset;
		1523
		1524	{
		1525	dREQ;
		1526
		1527	req->type = ix;
		1528	req->sv2 = SvREFCNT_inc (data);
		1529	req->ptr2 = (char *)svptr + offset;
		1530	req->size = len;
		1531	req->int1 = flags;
		1532
		1533	REQ_SEND;
		1534	}
		1535	}
		1536
		1537	void
		1538	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1539	PPCODE:
		1540	{
		1541	STRLEN svlen;
		1542	char *svptr = SvPVbyte (data, svlen);
		1543	UV len = SvUV (length);
		1544
		1545	if (offset < 0)
		1546	offset += svlen;
		1547
		1548	if (offset < 0 || offset > svlen)
		1549	croak ("offset outside of scalar");
		1550
		1551	if (!SvOK (length) || len + offset > svlen)
		1552	len = svlen - offset;
		1553
		1554	{
		1555	dREQ;
		1556
		1557	req->type = EIO_MLOCK;
		1558	req->sv2 = SvREFCNT_inc (data);
		1559	req->ptr2 = (char *)svptr + offset;
		1560	req->size = len;
		1561
		1562	REQ_SEND;
		1563	}
		1564	}
		1565
		1566	void
		1567	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1568	PPCODE:
		1569	{
		1570	dREQ;
		1571
		1572	req->type = EIO_MLOCKALL;
		1573	req->int1 = flags;
		1574
		1575	REQ_SEND;
		1576	}
		1577
		1578	void
		1579	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback=&PL_sv_undef)
		1580	PPCODE:
		1581	{
		1582	int fd = s_fileno_croak (fh, 0);
		1583	dREQ;
		1584
		1585	req->type = EIO_CUSTOM;
		1586	req->sv1 = newSVsv (fh);
		1587	req->int1 = fd;
		1588
		1589	req->feed = fiemap;
		1590	#if HAVE_FIEMAP
		1591	/* keep our fingers crossed that the next two types are 64 bit */
		1592	req->offs = start;
		1593	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1594	req->int2 = flags;
		1595	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1596	#endif
		1597
		1598	REQ_SEND;
		1599	}
		1600
		1601	void
		1602	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1603	PPCODE:
		1604	{
		1605	dREQ;
		1606
		1607	req->type = EIO_BUSY;
		1608	req->nv1 = delay < 0. ? 0. : delay;
		1609
		1610	REQ_SEND;
		1611	}
		1612
		1613	void
		1614	aio_group (SV *callback=&PL_sv_undef)
		1615	PPCODE:
		1616	{
		1617	dREQ;
		1618
		1619	req->type = EIO_GROUP;
		1620
		1621	req_submit (req);
		1622	XPUSHs (req_sv (req, aio_grp_stash));
		1623	}
		1624
		1625	void
		1626	aio_nop (SV *callback=&PL_sv_undef)
		1627	ALIAS:
		1628	aio_nop = EIO_NOP
		1629	aio_sync = EIO_SYNC
		1630	PPCODE:
		1631	{
		1632	dREQ;
		1633
		1634	req->type = ix;
		1635
		1636	REQ_SEND;
		1637	}
		1638
		1639	int
		1640	aioreq_pri (int pri = 0)
1042	CODE:	1641	CODE:
		1642	RETVAL = next_pri;
		1643	if (items > 0)
		1644	{
		1645	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1646	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1647	next_pri = pri;
		1648	}
		1649	OUTPUT:
		1650	RETVAL
		1651
		1652	void
		1653	aioreq_nice (int nice = 0)
		1654	CODE:
		1655	nice = next_pri - nice;
		1656	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1657	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1658	next_pri = nice;
		1659
		1660	void
		1661	flush ()
		1662	CODE:
1043	while (nreqs)	1663	while (eio_nreqs ())
1044	{	1664	{
1045	poll_wait ();	1665	poll_wait ();
1046	poll_cb ();	1666	poll_cb ();
1047	}	1667	}
1048		1668
1049	void	1669	int
1050	poll()	1670	poll ()
1051	PROTOTYPE:
1052	CODE:	1671	CODE:
1053	if (nreqs)
1054	{
1055	poll_wait ();	1672	poll_wait ();
1056	poll_cb ();	1673	RETVAL = poll_cb ();
1057	}
1058
1059	int
1060	poll_fileno()
1061	PROTOTYPE:
1062	CODE:
1063	RETVAL = respipe [0];
1064	OUTPUT:	1674	OUTPUT:
1065	RETVAL	1675	RETVAL
1066		1676
1067	int	1677	int
		1678	poll_fileno ()
		1679	CODE:
		1680	RETVAL = s_epipe_fd (&respipe);
		1681	OUTPUT:
		1682	RETVAL
		1683
		1684	int
1068	poll_cb(...)	1685	poll_cb (...)
1069	PROTOTYPE:	1686	PROTOTYPE:
1070	CODE:	1687	CODE:
1071	RETVAL = poll_cb ();	1688	RETVAL = poll_cb ();
1072	OUTPUT:	1689	OUTPUT:
1073	RETVAL	1690	RETVAL
1074		1691
1075	void	1692	void
1076	poll_wait()	1693	poll_wait ()
1077	PROTOTYPE:
1078	CODE:	1694	CODE:
1079	if (nreqs)
1080	poll_wait ();	1695	poll_wait ();
1081		1696
1082	int	1697	int
1083	nreqs()	1698	nreqs ()
1084	PROTOTYPE:
1085	CODE:	1699	CODE:
1086	RETVAL = nreqs;	1700	RETVAL = eio_nreqs ();
1087	OUTPUT:	1701	OUTPUT:
1088	RETVAL	1702	RETVAL
1089		1703
		1704	int
		1705	nready ()
		1706	CODE:
		1707	RETVAL = eio_nready ();
		1708	OUTPUT:
		1709	RETVAL
		1710
		1711	int
		1712	npending ()
		1713	CODE:
		1714	RETVAL = eio_npending ();
		1715	OUTPUT:
		1716	RETVAL
		1717
		1718	int
		1719	nthreads ()
		1720	CODE:
		1721	RETVAL = eio_nthreads ();
		1722	OUTPUT:
		1723	RETVAL
		1724
		1725	int
		1726	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1727	CODE:
		1728	RETVAL = posix_fadvise (fh, offset, length, advice);
		1729	OUTPUT:
		1730	RETVAL
		1731
		1732	IV
		1733	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1734	CODE:
		1735	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1736	OUTPUT:
		1737	RETVAL
		1738
		1739	void
		1740	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1741	PPCODE:
		1742	sv_unmagic (scalar, MMAP_MAGIC);
		1743	{
		1744	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1745	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1746	if (addr == (void *)-1)
		1747	XSRETURN_NO;
		1748
		1749	sv_force_normal (scalar);
		1750
		1751	/* we store the length in mg_obj, as namlen is I32 :/ */
		1752	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1753	->mg_obj = (SV *)length;
		1754
		1755	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1756
		1757	if (!(prot & PROT_WRITE))
		1758	SvREADONLY_on (scalar);
		1759
		1760	if (SvLEN (scalar))
		1761	Safefree (SvPVX (scalar));
		1762
		1763	SvPVX (scalar) = (char *)addr;
		1764	SvCUR_set (scalar, length);
		1765	SvLEN_set (scalar, 0);
		1766	SvPOK_only (scalar);
		1767
		1768	XSRETURN_YES;
		1769	}
		1770
		1771	void
		1772	munmap (SV *scalar)
		1773	CODE:
		1774	sv_unmagic (scalar, MMAP_MAGIC);
		1775
		1776	int
		1777	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1778	ALIAS:
		1779	mprotect = 1
		1780	CODE:
		1781	{
		1782	STRLEN svlen;
		1783	void *addr = SvPVbyte (scalar, svlen);
		1784	size_t len = SvUV (length);
		1785
		1786	if (offset < 0)
		1787	offset += svlen;
		1788
		1789	if (offset < 0 || offset > svlen)
		1790	croak ("offset outside of scalar");
		1791
		1792	if (!SvOK (length) || len + offset > svlen)
		1793	len = svlen - offset;
		1794
		1795	addr = (void *)(((intptr_t)addr) + offset);
		1796	eio_page_align (&addr, &len);
		1797
		1798	switch (ix)
		1799	{
		1800	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1801	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1802	}
		1803	}
		1804	OUTPUT:
		1805	RETVAL
		1806
		1807	int
		1808	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1809	CODE:
		1810	{
		1811	STRLEN svlen;
		1812	void *addr = SvPVbyte (scalar, svlen);
		1813	size_t len = SvUV (length);
		1814
		1815	if (offset < 0)
		1816	offset += svlen;
		1817
		1818	if (offset < 0 || offset > svlen)
		1819	croak ("offset outside of scalar");
		1820
		1821	if (!SvOK (length) || len + offset > svlen)
		1822	len = svlen - offset;
		1823
		1824	addr = (void *)(((intptr_t)addr) + offset);
		1825	eio_page_align (&addr, &len);
		1826	#if _POSIX_MEMLOCK_RANGE
		1827	RETVAL = munlock (addr, len);
		1828	#else
		1829	RETVAL = EIO_ENOSYS ();
		1830	#endif
		1831	}
		1832	OUTPUT:
		1833	RETVAL
		1834
		1835	int
		1836	munlockall ()
		1837	CODE:
		1838	#if _POSIX_MEMLOCK
		1839	munlockall ();
		1840	#else
		1841	RETVAL = EIO_ENOSYS ();
		1842	#endif
		1843	OUTPUT:
		1844	RETVAL
		1845
		1846	int
		1847	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1848	CODE:
		1849	{
		1850	#if HAVE_LINUX_SPLICE
		1851	loff_t off_in_, off_out_;
		1852	RETVAL = splice (
		1853	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1854	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1855	length, flags
		1856	);
		1857	#else
		1858	RETVAL = EIO_ENOSYS ();
		1859	#endif
		1860	}
		1861	OUTPUT:
		1862	RETVAL
		1863
		1864	int
		1865	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1866	CODE:
		1867	#if HAVE_LINUX_SPLICE
		1868	RETVAL = tee (rfh, wfh, length, flags);
		1869	#else
		1870	RETVAL = EIO_ENOSYS ();
		1871	#endif
		1872	OUTPUT:
		1873	RETVAL
		1874
		1875	void _on_next_submit (SV *cb)
		1876	CODE:
		1877	SvREFCNT_dec (on_next_submit);
		1878	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1879
		1880	PROTOTYPES: DISABLE
		1881
		1882	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1883
		1884	BOOT:
		1885	{
		1886	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1887	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1888	}
		1889
		1890	void
		1891	DESTROY (SV *self)
		1892	CODE:
		1893	{
		1894	aio_wd wd = SvAIO_WD (self);
		1895	#if HAVE_AT
		1896	{
		1897	SV *callback = &PL_sv_undef;
		1898	dREQ; /* clobbers next_pri :/ */
		1899	next_pri = req->pri; /* restore next_pri */
		1900	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1901	req->type = EIO_WD_CLOSE;
		1902	req->wd = wd;
		1903	REQ_SEND;
		1904	}
		1905	#else
		1906	eio_wd_close_sync (wd);
		1907	#endif
		1908	}
		1909
		1910	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1911
		1912	void
		1913	cancel (aio_req_ornot req)
		1914	CODE:
		1915	eio_cancel (req);
		1916
		1917	void
		1918	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1919	PPCODE:
		1920	{
		1921	if (GIMME_V != G_VOID)
		1922	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1923
		1924	if (items > 1)
		1925	{
		1926	SV *cb_cv =get_cb (callback);
		1927
		1928	SvREFCNT_dec (req->callback);
		1929	req->callback = SvREFCNT_inc (cb_cv);
		1930	}
		1931	}
		1932
		1933	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1934
		1935	void
		1936	add (aio_req grp, ...)
		1937	PPCODE:
		1938	{
		1939	int i;
		1940
		1941	if (grp->int1 == 2)
		1942	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1943
		1944	for (i = 1; i < items; ++i )
		1945	{
		1946	aio_req req;
		1947
		1948	if (GIMME_V != G_VOID)
		1949	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1950
		1951	req = SvAIO_REQ (ST (i));
		1952
		1953	if (req)
		1954	eio_grp_add (grp, req);
		1955	}
		1956	}
		1957
		1958	void
		1959	cancel_subs (aio_req_ornot req)
		1960	CODE:
		1961	req_cancel_subs (req);
		1962
		1963	void
		1964	result (aio_req grp, ...)
		1965	CODE:
		1966	{
		1967	int i;
		1968	AV *av;
		1969
		1970	grp->errorno = errno;
		1971
		1972	av = newAV ();
		1973	av_extend (av, items - 1);
		1974
		1975	for (i = 1; i < items; ++i )
		1976	av_push (av, newSVsv (ST (i)));
		1977
		1978	SvREFCNT_dec (grp->sv1);
		1979	grp->sv1 = (SV *)av;
		1980	}
		1981
		1982	void
		1983	errno (aio_req grp, int errorno = errno)
		1984	CODE:
		1985	grp->errorno = errorno;
		1986
		1987	void
		1988	limit (aio_req grp, int limit)
		1989	CODE:
		1990	eio_grp_limit (grp, limit);
		1991
		1992	void
		1993	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1994	CODE:
		1995	{
		1996	SvREFCNT_dec (grp->sv2);
		1997	grp->sv2 = newSVsv (callback);
		1998	grp->feed = aio_grp_feed;
		1999
		2000	if (grp->int2 <= 0)
		2001	grp->int2 = 2;
		2002
		2003	eio_grp_limit (grp, grp->int2);
		2004	}
		2005

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