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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.40 by root, Sat Jun 24 16:27:02 2006 UTC vs.
Revision 1.225 by root, Sat Dec 29 09:35:39 2012 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, REQ_RENAME,
55	REQ_READDIR,
56	REQ_LINK, 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 (atcually 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	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
		227	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		228	errno = ENOMEM;
142	if (req)	229	if (!fiemap)
		230	return;
		231
		232	req->ptr1 = fiemap;
		233
		234	for (count = 0; count < incmap->fm_mapped_extents; ++count)
143	{	235	{
144	ress = req->next;	236	struct fiemap_extent *e = incmap->fm_extents + count;
145		237
146	if (!ress)	238	if (e->fe_logical + e->fe_length >= end_offset)
147	{	239	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		240
153	rese = 0;	241	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
154	}
155	}
156		242
157	pthread_mutex_unlock (&reslock);	243	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		244	goto done;
158		245
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	}	246	}
551	}	247	}
552		248
553	return res;	249	done:
554	}	250	req->result = 0;
555		251
556	/* read a full directory */	252	#else
		253	errno = ENOSYS;
		254	#endif
		255	}
		256
		257	/*****************************************************************************/
		258
		259	enum {
		260	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		261	};
		262
		263	typedef eio_req *aio_req;
		264	typedef eio_req *aio_req_ornot;
		265	typedef eio_wd aio_wd;
		266
		267	static SV *on_next_submit;
		268	static int next_pri = EIO_PRI_DEFAULT;
		269	static int max_outstanding;
		270
		271	static s_epipe respipe;
		272
		273	static void req_destroy (aio_req req);
		274	static void req_cancel (aio_req req);
		275
		276	static void
		277	want_poll (void)
		278	{
		279	/* write a dummy byte to the pipe so fh becomes ready */
		280	s_epipe_signal (&respipe);
		281	}
		282
		283	static void
		284	done_poll (void)
		285	{
		286	/* read any signals sent by the worker threads */
		287	s_epipe_drain (&respipe);
		288	}
		289
		290	/* must be called at most once */
		291	static SV *
		292	req_sv (aio_req req, HV *stash)
		293	{
		294	if (!req->self)
		295	{
		296	req->self = (SV *)newHV ();
		297	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		298	}
		299
		300	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		301	}
		302
		303	static SV *
		304	newSVaio_wd (aio_wd wd)
		305	{
		306	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		307	}
		308
		309	static aio_req
		310	SvAIO_REQ (SV *sv)
		311	{
		312	MAGIC *mg;
		313
		314	if (!SvROK (sv)
		315	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		316	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		317	&& SvSTASH (SvRV (sv)) != aio_req_stash
		318	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		319	croak ("object of class IO::AIO::REQ expected");
		320
		321	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		322
		323	return mg ? (aio_req)mg->mg_ptr : 0;
		324	}
		325
		326	static aio_wd
		327	SvAIO_WD (SV *sv)
		328	{
		329	if (!SvROK (sv)
		330	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		331	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		332	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		333
		334	return (aio_wd)(long)SvIVX (SvRV (sv));
		335	}
		336
		337	static void
		338	aio_grp_feed (aio_req grp)
		339	{
		340	if (grp->sv2 && SvOK (grp->sv2))
		341	{
		342	dSP;
		343
		344	ENTER;
		345	SAVETMPS;
		346	PUSHMARK (SP);
		347	XPUSHs (req_sv (grp, aio_grp_stash));
		348	PUTBACK;
		349	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		350	SPAGAIN;
		351	FREETMPS;
		352	LEAVE;
		353	}
		354	}
		355
		356	static void
		357	req_submit (eio_req *req)
		358	{
		359	eio_submit (req);
		360
		361	if (expect_false (on_next_submit))
		362	{
		363	dSP;
		364	SV *cb = sv_2mortal (on_next_submit);
		365
		366	on_next_submit = 0;
		367
		368	PUSHMARK (SP);
		369	PUTBACK;
		370	call_sv (cb, G_DISCARD | G_EVAL);
		371	}
		372	}
		373
557	static int	374	static int
558	scandir_ (const char *path, void **namesp)	375	req_invoke (eio_req *req)
559	{	376	{
560	DIR *dirp = opendir (path);	377	if (req->flags & FLAG_SV2_RO_OFF)
561	union	378	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		379
573	if (!dirp)	380	if (!EIO_CANCELLED (req) && req->callback)
574	return -1;
575
576	names = malloc (memlen);
577
578	for (;;)
579	{	381	{
580	errno = 0, readdir_r (dirp, &u.d, &entp);	382	dSP;
		383	static SV *sv_result_cache; /* caches the result integer SV */
		384	SV *sv_result;
581		385
582	if (!entp)	386	ENTER;
583	break;	387	SAVETMPS;
		388	PUSHMARK (SP);
		389	EXTEND (SP, 1);
584		390
585	name = entp->d_name;	391	/* do not recreate the result IV from scratch each time */
586		392	if (expect_true (sv_result_cache))
587	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
588	{	393	{
589	int len = strlen (name) + 1;	394	sv_result = sv_result_cache; sv_result_cache = 0;
590		395	SvIV_set (sv_result, req->result);
591	res++;	396	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_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
671	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
672	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
673
674	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
675	case REQ_FSYNC: req->result = fsync (req->fd); break;
676	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
677
678	case REQ_QUIT:
679	break;
680
681	default:
682	req->result = ENOSYS;
683	break;
684	}
685
686	req->errorno = errno;
687
688	pthread_mutex_lock (&reslock);
689
690	req->next = 0;
691
692	if (rese)
693	{
694	rese->next = req;
695	rese = req;
696	}	397	}
697	else	398	else
698	{	399	{
699	rese = ress = req;	400	sv_result = newSViv (req->result);
700		401	SvREADONLY_on (sv_result);
701	/* write a dummy byte to the pipe so fh becomes ready */
702	write (respipe [1], &respipe, 1);
703	}	402	}
704		403
705	pthread_mutex_unlock (&reslock);	404	switch (req->type)
		405	{
		406	case EIO_WD_OPEN:
		407	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		408	break;
		409
		410	case EIO_READDIR:
		411	{
		412	SV *rv = &PL_sv_undef;
		413
		414	if (req->result >= 0)
		415	{
		416	int i;
		417	char *names = (char *)req->ptr2;
		418	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		419	AV *av = newAV ();
		420
		421	av_extend (av, req->result - 1);
		422
		423	for (i = 0; i < req->result; ++i)
		424	{
		425	if (req->int1 & EIO_READDIR_DENTS)
		426	{
		427	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		428
		429	if (req->int1 & EIO_READDIR_CUSTOM2)
		430	{
		431	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		432	AV *avent = newAV ();
		433
		434	av_extend (avent, 2);
		435
		436	if (!sv_type [ent->type])
		437	{
		438	sv_type [ent->type] = newSViv (ent->type);
		439	SvREADONLY_on (sv_type [ent->type]);
		440	}
		441
		442	av_store (avent, 0, namesv);
		443	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		444	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		445
		446	av_store (av, i, newRV_noinc ((SV *)avent));
		447	}
		448	else
		449	av_store (av, i, namesv);
		450
		451	++ent;
		452	}
		453	else
		454	{
		455	SV *name = newSVpv (names, 0);
		456	av_store (av, i, name);
		457	names += SvCUR (name) + 1;
		458	}
		459	}
		460
		461	rv = sv_2mortal (newRV_noinc ((SV *)av));
		462	}
		463
		464	PUSHs (rv);
		465
		466	if (req->int1 & EIO_READDIR_CUSTOM1)
		467	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		468	}
		469	break;
		470
		471	case EIO_OPEN:
		472	{
		473	/* convert fd to fh */
		474	SV *fh = &PL_sv_undef;
		475
		476	if (req->result >= 0)
		477	{
		478	GV *gv = (GV *)sv_newmortal ();
		479	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		480	char sym [64];
		481	int symlen;
		482
		483	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		484	gv_init (gv, aio_stash, sym, symlen, 0);
		485
		486	symlen = snprintf (
		487	sym,
		488	sizeof (sym),
		489	"%s&=%d",
		490	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		491	(int)req->result
		492	);
		493
		494	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		495	fh = (SV *)gv;
		496	}
		497
		498	PUSHs (fh);
		499	}
		500	break;
		501
		502	case EIO_STATVFS:
		503	case EIO_FSTATVFS:
		504	{
		505	SV *rv = &PL_sv_undef;
		506
		507	#ifndef _WIN32
		508	if (req->result >= 0)
		509	{
		510	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		511	HV *hv = newHV ();
		512	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		513	* chooses to make it a struct.
		514	*/
		515	unsigned long fsid = 0;
		516	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
		517
		518	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		519
		520	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		521	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		522	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		523	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		524	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		525	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		526	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		527	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		528	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		529	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		530	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		531	}
		532	#endif
		533
		534	PUSHs (rv);
		535	}
		536
		537	break;
		538
		539	case EIO_GROUP:
		540	req->int1 = 2; /* mark group as finished */
		541
		542	if (req->sv1)
		543	{
		544	int i;
		545	AV *av = (AV *)req->sv1;
		546
		547	EXTEND (SP, AvFILL (av) + 1);
		548	for (i = 0; i <= AvFILL (av); ++i)
		549	PUSHs (*av_fetch (av, i, 0));
		550	}
		551	break;
		552
		553	case EIO_NOP:
		554	case EIO_BUSY:
		555	break;
		556
		557	case EIO_READLINK:
		558	case EIO_REALPATH:
		559	if (req->result > 0)
		560	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		561	break;
		562
		563	case EIO_STAT:
		564	case EIO_LSTAT:
		565	case EIO_FSTAT:
		566	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		567
		568	if (!(PL_laststatval = req->result))
		569	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		570	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		571
		572	PUSHs (sv_result);
		573	break;
		574
		575	case EIO_SEEK:
		576	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		577	break;
		578
		579	case EIO_READ:
		580	{
		581	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		582	*SvEND (req->sv2) = 0;
		583	SvPOK_only (req->sv2);
		584	SvSETMAGIC (req->sv2);
		585	PUSHs (sv_result);
		586	}
		587	break;
		588
		589	case EIO_CUSTOM:
		590	if (req->feed == fiemap)
		591	{
		592	#if HAVE_FIEMAP
		593	if (!req->result)
		594	{
		595	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		596
		597	if (fiemap->fm_extent_count)
		598	{
		599	AV *av = newAV ();
		600	int i;
		601
		602	while (fiemap->fm_mapped_extents)
		603	{
		604	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		605	AV *ext_av = newAV ();
		606
		607	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		608	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		609	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		610	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		611
		612	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		613	}
		614
		615	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		616	}
		617	else
		618	{
		619	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		620	PUSHs (sv_result);
		621	}
		622	}
		623	#endif
		624	}
		625	else
		626	PUSHs (sv_result);
		627	break;
		628
		629	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		630	if (req->result > 0)
		631	SvIV_set (sv_result, 0);
		632	/* FALLTHROUGH */
		633
		634	default:
		635	PUSHs (sv_result);
		636	break;
		637	}
		638
		639	errno = req->errorno;
		640
		641	PUTBACK;
		642	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		643	SPAGAIN;
		644
		645	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		646	SvREFCNT_dec (sv_result);
		647	else
		648	sv_result_cache = sv_result;
		649
		650	FREETMPS;
		651	LEAVE;
		652
		653	PUTBACK;
706	}	654	}
707	while (type != REQ_QUIT);	655
		656	return !!SvTRUE (ERRSV);
		657	}
		658
		659	static void
		660	req_destroy (aio_req req)
		661	{
		662	if (req->self)
		663	{
		664	sv_unmagic (req->self, PERL_MAGIC_ext);
		665	SvREFCNT_dec (req->self);
		666	}
		667
		668	SvREFCNT_dec (req->sv1);
		669	SvREFCNT_dec (req->sv2);
		670	SvREFCNT_dec (req->sv3);
		671	SvREFCNT_dec (req->sv4);
		672	SvREFCNT_dec (req->callback);
		673
		674	free (req);
		675	}
		676
		677	static void
		678	req_cancel_subs (aio_req grp)
		679	{
		680	if (grp->type != EIO_GROUP)
		681	return;
		682
		683	SvREFCNT_dec (grp->sv2);
		684	grp->sv2 = 0;
		685
		686	eio_grp_cancel (grp);
		687	}
		688
		689	static void ecb_cold
		690	create_respipe (void)
		691	{
		692	if (s_epipe_renew (&respipe))
		693	croak ("IO::AIO: unable to initialize result pipe");
		694	}
		695
		696	static void
		697	poll_wait (void)
		698	{
		699	while (eio_nreqs ())
		700	{
		701	int size;
		702
		703	X_LOCK (reslock);
		704	size = res_queue.size;
		705	X_UNLOCK (reslock);
		706
		707	if (size)
		708	return;
		709
		710	etp_maybe_start_thread ();
		711
		712	s_epipe_wait (&respipe);
		713	}
		714	}
		715
		716	static int
		717	poll_cb (void)
		718	{
		719	for (;;)
		720	{
		721	int res = eio_poll ();
		722
		723	if (res > 0)
		724	croak (0);
		725
		726	if (!max_outstanding || max_outstanding > eio_nreqs ())
		727	return res;
		728
		729	poll_wait ();
		730	}
		731	}
		732
		733	static void ecb_cold
		734	reinit (void)
		735	{
		736	create_respipe ();
		737
		738	if (eio_init (want_poll, done_poll) < 0)
		739	croak ("IO::AIO: unable to initialise eio library");
		740	}
		741
		742	/*****************************************************************************/
		743
		744	#if !_POSIX_MAPPED_FILES
		745	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		746	# define munmap(addr,length) EIO_ENOSYS ()
		747	#endif
		748
		749	#if !_POSIX_MEMORY_PROTECTION
		750	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		751	# define PROT_NONE 0
		752	# define PROT_WRITE 0
		753	# define MAP_PRIVATE 0
		754	# define MAP_SHARED 0
		755	# define MAP_FIXED 0
		756	#endif
		757
		758	#define MMAP_MAGIC PERL_MAGIC_ext
		759
		760	static int ecb_cold
		761	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		762	{
		763	int old_errno = errno;
		764	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		765	errno = old_errno;
		766
		767	mg->mg_obj = 0; /* just in case */
		768
		769	SvREADONLY_off (sv);
		770
		771	if (SvPVX (sv) != mg->mg_ptr)
		772	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		773
		774	SvCUR_set (sv, 0);
		775	SvPVX (sv) = 0;
		776	SvOK_off (sv);
708		777
709	return 0;	778	return 0;
710	}	779	}
711		780
		781	static MGVTBL mmap_vtbl = {
		782	0, 0, 0, 0, mmap_free
		783	};
		784
712	/*****************************************************************************/	785	/*****************************************************************************/
713		786
714	static void atfork_prepare (void)	787	static SV *
		788	get_cb (SV *cb_sv)
715	{	789	{
716	pthread_mutex_lock (&reqlock);	790	SvGETMAGIC (cb_sv);
717	pthread_mutex_lock (&reslock);	791	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
718	#if !HAVE_PREADWRITE
719	pthread_mutex_lock (&preadwritelock);
720	#endif
721	#if !HAVE_READDIR_R
722	pthread_mutex_lock (&readdirlock);
723	#endif
724	}	792	}
725		793
726	static void atfork_parent (void)	794	static aio_req ecb_noinline
		795	dreq (SV *callback)
727	{	796	{
728	#if !HAVE_READDIR_R	797	SV *cb_cv;
729	pthread_mutex_unlock (&readdirlock);
730	#endif
731	#if !HAVE_PREADWRITE
732	pthread_mutex_unlock (&preadwritelock);
733	#endif
734	pthread_mutex_unlock (&reslock);
735	pthread_mutex_unlock (&reqlock);
736	}
737
738	static void atfork_child (void)
739	{
740	aio_req prv;	798	aio_req req;
		799	int req_pri = next_pri;
		800	next_pri = EIO_PRI_DEFAULT;
741		801
742	started = 0;	802	cb_cv = get_cb (callback);
743		803
744	while (reqs)	804	req = calloc (sizeof (*req), 1);
		805	if (!req)
		806	croak ("out of memory during eio_req allocation");
		807
		808	req->callback = SvREFCNT_inc (cb_cv);
		809	req->pri = req_pri;
		810
		811	return req;
		812	}
		813
		814	#define dREQ \
		815	aio_req req = dreq (callback); \
		816
		817	#define REQ_SEND \
		818	PUTBACK; \
		819	req_submit (req); \
		820	SPAGAIN; \
		821	\
		822	if (GIMME_V != G_VOID) \
		823	XPUSHs (req_sv (req, aio_req_stash));
		824
		825	ecb_inline void
		826	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		827	{
		828	if (expect_false (SvROK (path)))
745	{	829	{
746	prv = reqs;	830	SV *rv = SvRV (path);
747	reqs = prv->next;	831	SV *wdob;
748	free_req (prv);	832
		833	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
		834	{
		835	path = AvARRAY (rv)[1];
		836	wdob = AvARRAY (rv)[0];
		837
		838	if (SvOK (wdob))
		839	{
		840	*wd = SvAIO_WD (wdob);
		841	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		842	}
		843	else
		844	*wd = EIO_INVALID_WD;
		845	}
		846	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		847	{
		848	*wd = (aio_wd)(long)SvIVX (rv);
		849	*wdsv = SvREFCNT_inc_NN (rv);
		850	*ptr = ".";
		851	return; /* path set to "." */
		852	}
		853	else
		854	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
749	}	855	}
750		856
751	reqs = reqe = 0;	857	*pathsv = newSVsv (path);
752		858	*ptr = SvPVbyte_nolen (*pathsv);
753	while (ress)	859	}
		860
		861	static void ecb_noinline
		862	req_set_path1 (aio_req req, SV *path)
		863	{
		864	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		865	}
		866
		867	static void ecb_noinline
		868	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		869	{
		870	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		871
		872	switch (SvTYPE (rv))
754	{	873	{
755	prv = ress;	874	case SVt_PVIO:
756	ress = prv->next;	875	case SVt_PVLV:
757	free_req (prv);	876	case SVt_PVGV:
		877	req->type = type_fh;
		878	req->sv1 = newSVsv (fh_or_path);
		879	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		880	break;
		881
		882	default:
		883	req->type = type_path;
		884	req_set_path1 (req, fh_or_path);
		885	break;
758	}	886	}
759
760	ress = rese = 0;
761
762	close (respipe [0]);
763	close (respipe [1]);
764	create_pipe ();
765
766	atfork_parent ();
767	}	887	}
768		888
769	#define dREQ \	889	XS(boot_IO__AIO) ecb_cold;
770	aio_req req; \	890
771	\
772	if (SvOK (callback) && !SvROK (callback)) \
773	croak ("clalback must be undef or of reference type"); \
774	\
775	Newz (0, req, 1, aio_cb); \
776	if (!req) \
777	croak ("out of memory during aio_req allocation"); \
778	\
779	req->callback = newSVsv (callback);
780
781	MODULE = IO::AIO PACKAGE = IO::AIO	891	MODULE = IO::AIO PACKAGE = IO::AIO
782		892
783	PROTOTYPES: ENABLE	893	PROTOTYPES: ENABLE
784		894
785	BOOT:	895	BOOT:
786	{	896	{
787	create_pipe ();	897	static const struct {
788	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	898	const char *name;
789	}	899	IV iv;
		900	} *civ, const_iv[] = {
		901	# define const_niv(name, value) { # name, (IV) value },
		902	# define const_iv(name) { # name, (IV) name },
		903	# define const_eio(name) { # name, (IV) EIO_ ## name },
790		904
		905	/* you have to re-run ./gendef0 after adding/Removing any constants here */
		906
		907	const_iv (ENOSYS)
		908	const_iv (EXDEV)
		909	const_iv (EBADR)
		910
		911	const_iv (O_RDONLY)
		912	const_iv (O_WRONLY)
		913	const_iv (O_RDWR)
		914	const_iv (O_CREAT)
		915	const_iv (O_TRUNC)
		916	const_iv (O_EXCL)
		917	const_iv (O_APPEND)
		918
		919	const_iv (O_ASYNC)
		920	const_iv (O_DIRECT)
		921	const_iv (O_NOATIME)
		922
		923	const_iv (O_CLOEXEC)
		924	const_iv (O_NOCTTY)
		925	const_iv (O_NOFOLLOW)
		926	const_iv (O_NONBLOCK)
		927	const_iv (O_EXEC)
		928	const_iv (O_SEARCH)
		929	const_iv (O_DIRECTORY)
		930	const_iv (O_DSYNC)
		931	const_iv (O_RSYNC)
		932	const_iv (O_SYNC)
		933	const_iv (O_TTY_INIT)
		934
		935	const_iv (S_IFIFO)
		936	const_iv (S_IFCHR)
		937	const_iv (S_IFBLK)
		938	const_iv (S_IFLNK)
		939	const_iv (S_IFREG)
		940	const_iv (S_IFDIR)
		941	const_iv (S_IFWHT)
		942	const_iv (S_IFSOCK)
		943	const_iv (S_IFMT)
		944
		945	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		946	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		947	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		948	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		949	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		950	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		951
		952	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		953	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		954	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		955	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		956	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		957
		958	const_iv (ST_RDONLY)
		959	const_iv (ST_NOSUID)
		960	const_iv (ST_NODEV)
		961	const_iv (ST_NOEXEC)
		962	const_iv (ST_SYNCHRONOUS)
		963	const_iv (ST_MANDLOCK)
		964	const_iv (ST_WRITE)
		965	const_iv (ST_APPEND)
		966	const_iv (ST_IMMUTABLE)
		967	const_iv (ST_NOATIME)
		968	const_iv (ST_NODIRATIME)
		969	const_iv (ST_RELATIME)
		970
		971	const_iv (PROT_NONE)
		972	const_iv (PROT_EXEC)
		973	const_iv (PROT_READ)
		974	const_iv (PROT_WRITE)
		975
		976	/*const_iv (MAP_FIXED)*/
		977	const_iv (MAP_PRIVATE)
		978	const_iv (MAP_SHARED)
		979	const_iv (MAP_ANONYMOUS)
		980
		981	/* linuxish */
		982	const_iv (MAP_HUGETLB)
		983	const_iv (MAP_LOCKED)
		984	const_iv (MAP_NORESERVE)
		985	const_iv (MAP_POPULATE)
		986	const_iv (MAP_NONBLOCK)
		987
		988	const_iv (FIEMAP_FLAG_SYNC)
		989	const_iv (FIEMAP_FLAG_XATTR)
		990	const_iv (FIEMAP_FLAGS_COMPAT)
		991	const_iv (FIEMAP_EXTENT_LAST)
		992	const_iv (FIEMAP_EXTENT_UNKNOWN)
		993	const_iv (FIEMAP_EXTENT_DELALLOC)
		994	const_iv (FIEMAP_EXTENT_ENCODED)
		995	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		996	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		997	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		998	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		999	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1000	const_iv (FIEMAP_EXTENT_MERGED)
		1001	const_iv (FIEMAP_EXTENT_SHARED)
		1002
		1003	const_iv (SPLICE_F_MOVE)
		1004	const_iv (SPLICE_F_NONBLOCK)
		1005	const_iv (SPLICE_F_MORE)
		1006	const_iv (SPLICE_F_GIFT)
		1007
		1008	const_iv (SEEK_DATA)
		1009	const_iv (SEEK_HOLE)
		1010
		1011	/* libeio constants */
		1012	const_eio (SEEK_SET)
		1013	const_eio (SEEK_CUR)
		1014	const_eio (SEEK_END)
		1015
		1016	const_eio (MCL_FUTURE)
		1017	const_eio (MCL_CURRENT)
		1018
		1019	const_eio (MS_ASYNC)
		1020	const_eio (MS_INVALIDATE)
		1021	const_eio (MS_SYNC)
		1022
		1023	const_eio (MT_MODIFY)
		1024
		1025	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1026	const_eio (SYNC_FILE_RANGE_WRITE)
		1027	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1028
		1029	const_eio (FALLOC_FL_KEEP_SIZE)
		1030	const_eio (FALLOC_FL_PUNCH_HOLE)
		1031
		1032	const_eio (READDIR_DENTS)
		1033	const_eio (READDIR_DIRS_FIRST)
		1034	const_eio (READDIR_STAT_ORDER)
		1035	const_eio (READDIR_FOUND_UNKNOWN)
		1036
		1037	const_eio (DT_UNKNOWN)
		1038	const_eio (DT_FIFO)
		1039	const_eio (DT_CHR)
		1040	const_eio (DT_DIR)
		1041	const_eio (DT_BLK)
		1042	const_eio (DT_REG)
		1043	const_eio (DT_LNK)
		1044	const_eio (DT_SOCK)
		1045	const_eio (DT_WHT)
		1046	};
		1047
		1048	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1049	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1050	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1051	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
		1052
		1053	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
		1054	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
		1055
		1056	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1057
		1058	reinit ();
		1059	}
		1060
791	void	1061	void
792	min_parallel (nthreads)	1062	reinit ()
793	int nthreads	1063	PROTOTYPE:
		1064
		1065	void
		1066	max_poll_reqs (unsigned int nreqs)
794	PROTOTYPE: $	1067	PROTOTYPE: $
		1068	CODE:
		1069	eio_set_max_poll_reqs (nreqs);
795		1070
796	void	1071	void
797	max_parallel (nthreads)	1072	max_poll_time (double nseconds)
798	int nthreads
799	PROTOTYPE: $	1073	PROTOTYPE: $
800
801	int
802	max_outstanding (nreqs)
803	int nreqs
804	PROTOTYPE: $
805	CODE:	1074	CODE:
806	RETVAL = max_outstanding;	1075	eio_set_max_poll_time (nseconds);
		1076
		1077	void
		1078	min_parallel (unsigned int nthreads)
		1079	PROTOTYPE: $
		1080	CODE:
		1081	eio_set_min_parallel (nthreads);
		1082
		1083	void
		1084	max_parallel (unsigned int nthreads)
		1085	PROTOTYPE: $
		1086	CODE:
		1087	eio_set_max_parallel (nthreads);
		1088
		1089	void
		1090	max_idle (unsigned int nthreads)
		1091	PROTOTYPE: $
		1092	CODE:
		1093	eio_set_max_idle (nthreads);
		1094
		1095	void
		1096	idle_timeout (unsigned int seconds)
		1097	PROTOTYPE: $
		1098	CODE:
		1099	eio_set_idle_timeout (seconds);
		1100
		1101	void
		1102	max_outstanding (unsigned int maxreqs)
		1103	PROTOTYPE: $
		1104	CODE:
807	max_outstanding = nreqs;	1105	max_outstanding = maxreqs;
808		1106
809	void	1107	void
810	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1108	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
811	SV * pathname
812	int flags
813	int mode
814	SV * callback
815	PROTOTYPE: $$$;$
816	CODE:	1109	PPCODE:
817	{	1110	{
818	dREQ;	1111	dREQ;
819		1112
		1113	req->type = EIO_WD_OPEN;
		1114	req_set_path1 (req, pathname);
		1115
		1116	REQ_SEND;
		1117	}
		1118
		1119	void
		1120	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1121	PPCODE:
		1122	{
		1123	dREQ;
		1124
820	req->type = REQ_OPEN;	1125	req->type = EIO_OPEN;
821	req->data = newSVsv (pathname);	1126	req_set_path1 (req, pathname);
822	req->dataptr = SvPVbyte_nolen (req->data);
823	req->fd = flags;	1127	req->int1 = flags;
824	req->mode = mode;	1128	req->int2 = mode;
825		1129
826	send_req (req);	1130	REQ_SEND;
827	}	1131	}
828		1132
829	void	1133	void
830	aio_close (fh,callback=&PL_sv_undef)	1134	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
831	SV * fh
832	SV * callback
833	PROTOTYPE: $;$
834	ALIAS:	1135	ALIAS:
835	aio_close = REQ_CLOSE
836	aio_fsync = REQ_FSYNC	1136	aio_fsync = EIO_FSYNC
837	aio_fdatasync = REQ_FDATASYNC	1137	aio_fdatasync = EIO_FDATASYNC
		1138	aio_syncfs = EIO_SYNCFS
838	CODE:	1139	PPCODE:
839	{	1140	{
		1141	int fd = s_fileno_croak (fh, 0);
840	dREQ;	1142	dREQ;
841		1143
842	req->type = ix;	1144	req->type = ix;
843	req->fh = newSVsv (fh);	1145	req->sv1 = newSVsv (fh);
844	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1146	req->int1 = fd;
845		1147
846	send_req (req);	1148	REQ_SEND;
847	}	1149	}
848		1150
849	void	1151	void
		1152	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1153	PPCODE:
		1154	{
		1155	int fd = s_fileno_croak (fh, 0);
		1156	dREQ;
		1157
		1158	req->type = EIO_SYNC_FILE_RANGE;
		1159	req->sv1 = newSVsv (fh);
		1160	req->int1 = fd;
		1161	req->offs = offset;
		1162	req->size = nbytes;
		1163	req->int2 = flags;
		1164
		1165	REQ_SEND;
		1166	}
		1167
		1168	void
		1169	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1170	PPCODE:
		1171	{
		1172	int fd = s_fileno_croak (fh, 0);
		1173	dREQ;
		1174
		1175	req->type = EIO_FALLOCATE;
		1176	req->sv1 = newSVsv (fh);
		1177	req->int1 = fd;
		1178	req->int2 = mode;
		1179	req->offs = offset;
		1180	req->size = len;
		1181
		1182	REQ_SEND;
		1183	}
		1184
		1185	void
		1186	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1187	PPCODE:
		1188	{
		1189	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1190	int fd = s_fileno_croak (fh, 0);
		1191	dREQ;
		1192
		1193	if (expect_false (close_fd < 0))
		1194	{
		1195	int pipefd [2];
		1196
		1197	if (
		1198	#ifdef _WIN32
		1199	_pipe (pipefd, 1, _O_BINARY) < 0
		1200	#else
		1201	pipe (pipefd) < 0
		1202	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1203	#endif
		1204	|| close (pipefd [1]) < 0
		1205	)
		1206	abort (); /*D*/
		1207
		1208	close_fd = pipefd [0];
		1209	}
		1210
		1211	req->type = EIO_DUP2;
		1212	req->int1 = close_fd;
		1213	req->sv2 = newSVsv (fh);
		1214	req->int2 = fd;
		1215
		1216	REQ_SEND;
		1217	}
		1218
		1219	void
		1220	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
		1221	PPCODE:
		1222	{
		1223	int fd = s_fileno_croak (fh, 0);
		1224	dREQ;
		1225
		1226	req->type = EIO_SEEK;
		1227	req->sv1 = newSVsv (fh);
		1228	req->int1 = fd;
		1229	req->offs = SvVAL64 (offset);
		1230	req->int2 = whence;
		1231
		1232	REQ_SEND;
		1233	}
		1234
		1235	void
850	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1236	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
851	SV * fh
852	UV offset
853	UV length
854	SV * data
855	UV dataoffset
856	SV * callback
857	ALIAS:	1237	ALIAS:
858	aio_read = REQ_READ	1238	aio_read = EIO_READ
859	aio_write = REQ_WRITE	1239	aio_write = EIO_WRITE
860	PROTOTYPE: $$$$$;$
861	CODE:	1240	PPCODE:
862	{	1241	{
863	aio_req req;
864	STRLEN svlen;	1242	STRLEN svlen;
		1243	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
865	char *svptr = SvPVbyte (data, svlen);	1244	char *svptr = SvPVbyte (data, svlen);
866		1245	UV len = SvUV (length);
867	SvUPGRADE (data, SVt_PV);
868	SvPOK_on (data);
869		1246
870	if (dataoffset < 0)	1247	if (dataoffset < 0)
871	dataoffset += svlen;	1248	dataoffset += svlen;
872		1249
873	if (dataoffset < 0 || dataoffset > svlen)	1250	if (dataoffset < 0 || dataoffset > svlen)
874	croak ("data offset outside of string");	1251	croak ("dataoffset outside of data scalar");
875		1252
876	if (ix == REQ_WRITE)	1253	if (ix == EIO_WRITE)
877	{	1254	{
878	/* write: check length and adjust. */	1255	/* write: check length and adjust. */
879	if (length < 0 || length + dataoffset > svlen)	1256	if (!SvOK (length) || len + dataoffset > svlen)
880	length = svlen - dataoffset;	1257	len = svlen - dataoffset;
881	}	1258	}
882	else	1259	else
883	{	1260	{
884	/* read: grow scalar as necessary */	1261	/* read: check type and grow scalar as necessary */
		1262	SvUPGRADE (data, SVt_PV);
		1263	if (SvLEN (data) >= SvCUR (data))
885	svptr = SvGROW (data, length + dataoffset);	1264	svptr = SvGROW (data, len + dataoffset + 1);
		1265	else if (SvCUR (data) < len + dataoffset)
		1266	croak ("length + dataoffset outside of scalar, and cannot grow");
886	}	1267	}
887
888	if (length < 0)
889	croak ("length must not be negative");
890		1268
891	{	1269	{
892	dREQ;	1270	dREQ;
893		1271
894	req->type = ix;	1272	req->type = ix;
895	req->fh = newSVsv (fh);	1273	req->sv1 = newSVsv (fh);
896	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1274	req->int1 = fd;
897	: IoOFP (sv_2io (fh)));	1275	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
898	req->offset = offset;	1276	req->size = len;
899	req->length = length;
900	req->data = SvREFCNT_inc (data);	1277	req->sv2 = SvREFCNT_inc (data);
901	req->dataptr = (char *)svptr + dataoffset;	1278	req->ptr2 = (char *)svptr + dataoffset;
		1279	req->stroffset = dataoffset;
902		1280
903	if (!SvREADONLY (data))	1281	if (!SvREADONLY (data))
904	{	1282	{
905	SvREADONLY_on (data);	1283	SvREADONLY_on (data);
906	req->data2ptr = (void *)data;	1284	req->flags |= FLAG_SV2_RO_OFF;
907	}	1285	}
908		1286
909	send_req (req);	1287	REQ_SEND;
910	}	1288	}
911	}	1289	}
912		1290
913	void	1291	void
914	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1292	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
915	SV * out_fh	1293	ALIAS:
916	SV * in_fh	1294	aio_readlink = EIO_READLINK
917	UV in_offset	1295	aio_realpath = EIO_REALPATH
918	UV length
919	SV * callback
920	PROTOTYPE: $$$$;$
921	CODE:	1296	PPCODE:
922	{	1297	{
		1298	dREQ;
		1299
		1300	req->type = ix;
		1301	req_set_path1 (req, pathname);
		1302
		1303	REQ_SEND;
		1304	}
		1305
		1306	void
		1307	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1308	PPCODE:
		1309	{
		1310	int ifd = s_fileno_croak (in_fh , 0);
		1311	int ofd = s_fileno_croak (out_fh, 1);
923	dREQ;	1312	dREQ;
924		1313
925	req->type = REQ_SENDFILE;	1314	req->type = EIO_SENDFILE;
926	req->fh = newSVsv (out_fh);	1315	req->sv1 = newSVsv (out_fh);
927	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1316	req->int1 = ofd;
928	req->fh2 = newSVsv (in_fh);	1317	req->sv2 = newSVsv (in_fh);
929	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1318	req->int2 = ifd;
930	req->offset = in_offset;	1319	req->offs = in_offset;
931	req->length = length;	1320	req->size = length;
932		1321
933	send_req (req);	1322	REQ_SEND;
934	}	1323	}
935		1324
936	void	1325	void
937	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1326	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
938	SV * fh
939	UV offset
940	IV length
941	SV * callback
942	PROTOTYPE: $$$;$
943	CODE:	1327	PPCODE:
944	{	1328	{
		1329	int fd = s_fileno_croak (fh, 0);
945	dREQ;	1330	dREQ;
946		1331
947	req->type = REQ_READAHEAD;	1332	req->type = EIO_READAHEAD;
948	req->fh = newSVsv (fh);	1333	req->sv1 = newSVsv (fh);
949	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1334	req->int1 = fd;
950	req->offset = offset;	1335	req->offs = offset;
951	req->length = length;	1336	req->size = length;
952		1337
953	send_req (req);	1338	REQ_SEND;
954	}	1339	}
955		1340
956	void	1341	void
957	aio_stat (fh_or_path,callback=&PL_sv_undef)	1342	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
958	SV * fh_or_path
959	SV * callback
960	ALIAS:	1343	ALIAS:
961	aio_stat = REQ_STAT	1344	aio_stat = EIO_STAT
962	aio_lstat = REQ_LSTAT	1345	aio_lstat = EIO_LSTAT
		1346	aio_statvfs = EIO_STATVFS
		1347	PPCODE:
		1348	{
		1349	dREQ;
		1350
		1351	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1352
		1353	REQ_SEND;
		1354	}
		1355
		1356	UV
		1357	major (UV dev)
		1358	ALIAS:
		1359	minor = 1
963	CODE:	1360	CODE:
		1361	RETVAL = ix ? major (dev) : minor (dev);
		1362	OUTPUT:
		1363	RETVAL
		1364
		1365	UV
		1366	makedev (UV maj, UV min)
		1367	CODE:
		1368	RETVAL = makedev (maj, min);
		1369	OUTPUT:
		1370	RETVAL
		1371
		1372	void
		1373	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1374	PPCODE:
964	{	1375	{
965	dREQ;	1376	dREQ;
966		1377
967	New (0, req->statdata, 1, Stat_t);	1378	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
968	if (!req->statdata)	1379	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
969	{	1380	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
970	free_req (req);
971	croak ("out of memory during aio_req->statdata allocation");
972	}
973		1381
974	if (SvPOK (fh_or_path))	1382	REQ_SEND;
975	{
976	req->type = ix;
977	req->data = newSVsv (fh_or_path);
978	req->dataptr = SvPVbyte_nolen (req->data);
979	}
980	else
981	{
982	req->type = REQ_FSTAT;
983	req->fh = newSVsv (fh_or_path);
984	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
985	}
986
987	send_req (req);
988	}	1383	}
989		1384
990	void	1385	void
		1386	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1387	PPCODE:
		1388	{
		1389	dREQ;
		1390
		1391	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1392	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1393
		1394	REQ_SEND;
		1395	}
		1396
		1397	void
		1398	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1399	PPCODE:
		1400	{
		1401	dREQ;
		1402
		1403	req->int2 = mode;
		1404	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1405
		1406	REQ_SEND;
		1407	}
		1408
		1409	void
		1410	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1411	PPCODE:
		1412	{
		1413	dREQ;
		1414
		1415	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1416	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1417	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1418
		1419	REQ_SEND;
		1420	}
		1421
		1422	void
		1423	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1424	PPCODE:
		1425	{
		1426	dREQ;
		1427
		1428	req->type = EIO_READDIR;
		1429	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1430
		1431	if (flags & EIO_READDIR_DENTS)
		1432	req->int1 |= EIO_READDIR_CUSTOM2;
		1433
		1434	req_set_path1 (req, pathname);
		1435
		1436	REQ_SEND;
		1437	}
		1438
		1439	void
		1440	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1441	PPCODE:
		1442	{
		1443	dREQ;
		1444
		1445	req->type = EIO_MKDIR;
		1446	req->int2 = mode;
		1447	req_set_path1 (req, pathname);
		1448
		1449	REQ_SEND;
		1450	}
		1451
		1452	void
991	aio_unlink (pathname,callback=&PL_sv_undef)	1453	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
992	SV * pathname
993	SV * callback
994	ALIAS:	1454	ALIAS:
995	aio_unlink = REQ_UNLINK	1455	aio_unlink = EIO_UNLINK
996	aio_rmdir = REQ_RMDIR	1456	aio_rmdir = EIO_RMDIR
997	aio_readdir = REQ_READDIR	1457	aio_readdir = EIO_READDIR
998	CODE:	1458	PPCODE:
999	{	1459	{
1000	dREQ;	1460	dREQ;
1001		1461
1002	req->type = ix;	1462	req->type = ix;
1003	req->data = newSVsv (pathname);	1463	req_set_path1 (req, pathname);
1004	req->dataptr = SvPVbyte_nolen (req->data);
1005
1006	send_req (req);
1007	}
1008		1464
		1465	REQ_SEND;
		1466	}
		1467
1009	void	1468	void
1010	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1469	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1011	SV * oldpath
1012	SV * newpath
1013	SV * callback
1014	ALIAS:	1470	ALIAS:
1015	aio_link = REQ_LINK	1471	aio_link = EIO_LINK
1016	aio_symlink = REQ_SYMLINK	1472	aio_symlink = EIO_SYMLINK
1017	aio_rename = REQ_RENAME	1473	aio_rename = EIO_RENAME
1018	CODE:	1474	PPCODE:
1019	{	1475	{
		1476	eio_wd wd2 = 0;
1020	dREQ;	1477	dREQ;
1021		1478
1022	req->type = ix;	1479	req->type = ix;
1023	req->fh = newSVsv (oldpath);	1480	req_set_path1 (req, oldpath);
1024	req->data2ptr = SvPVbyte_nolen (req->fh);	1481	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1025	req->data = newSVsv (newpath);	1482	req->int3 = (long)wd2;
1026	req->dataptr = SvPVbyte_nolen (req->data);
1027		1483
1028	send_req (req);	1484	REQ_SEND;
1029	}	1485	}
		1486
		1487	void
		1488	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1489	PPCODE:
		1490	{
		1491	dREQ;
		1492
		1493	req->type = EIO_MKNOD;
		1494	req->int2 = (mode_t)mode;
		1495	req->offs = dev;
		1496	req_set_path1 (req, pathname);
		1497
		1498	REQ_SEND;
		1499	}
		1500
		1501	void
		1502	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1503	ALIAS:
		1504	aio_mtouch = EIO_MTOUCH
		1505	aio_msync = EIO_MSYNC
		1506	PPCODE:
		1507	{
		1508	STRLEN svlen;
		1509	char *svptr = SvPVbyte (data, svlen);
		1510	UV len = SvUV (length);
		1511
		1512	if (offset < 0)
		1513	offset += svlen;
		1514
		1515	if (offset < 0 || offset > svlen)
		1516	croak ("offset outside of scalar");
		1517
		1518	if (!SvOK (length) || len + offset > svlen)
		1519	len = svlen - offset;
		1520
		1521	{
		1522	dREQ;
		1523
		1524	req->type = ix;
		1525	req->sv2 = SvREFCNT_inc (data);
		1526	req->ptr2 = (char *)svptr + offset;
		1527	req->size = len;
		1528	req->int1 = flags;
		1529
		1530	REQ_SEND;
		1531	}
		1532	}
		1533
		1534	void
		1535	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1536	PPCODE:
		1537	{
		1538	STRLEN svlen;
		1539	char *svptr = SvPVbyte (data, svlen);
		1540	UV len = SvUV (length);
		1541
		1542	if (offset < 0)
		1543	offset += svlen;
		1544
		1545	if (offset < 0 || offset > svlen)
		1546	croak ("offset outside of scalar");
		1547
		1548	if (!SvOK (length) || len + offset > svlen)
		1549	len = svlen - offset;
		1550
		1551	{
		1552	dREQ;
		1553
		1554	req->type = EIO_MLOCK;
		1555	req->sv2 = SvREFCNT_inc (data);
		1556	req->ptr2 = (char *)svptr + offset;
		1557	req->size = len;
		1558
		1559	REQ_SEND;
		1560	}
		1561	}
		1562
		1563	void
		1564	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1565	PPCODE:
		1566	{
		1567	dREQ;
		1568
		1569	req->type = EIO_MLOCKALL;
		1570	req->int1 = flags;
		1571
		1572	REQ_SEND;
		1573	}
		1574
		1575	void
		1576	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback=&PL_sv_undef)
		1577	PPCODE:
		1578	{
		1579	int fd = s_fileno_croak (fh, 0);
		1580	dREQ;
		1581
		1582	req->type = EIO_CUSTOM;
		1583	req->sv1 = newSVsv (fh);
		1584	req->int1 = fd;
		1585
		1586	req->feed = fiemap;
		1587	#if HAVE_FIEMAP
		1588	/* keep our fingers crossed that the next two types are 64 bit */
		1589	req->offs = start;
		1590	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1591	req->int2 = flags;
		1592	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1593	#endif
		1594
		1595	REQ_SEND;
		1596	}
		1597
		1598	void
		1599	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1600	PPCODE:
		1601	{
		1602	dREQ;
		1603
		1604	req->type = EIO_BUSY;
		1605	req->nv1 = delay < 0. ? 0. : delay;
		1606
		1607	REQ_SEND;
		1608	}
		1609
		1610	void
		1611	aio_group (SV *callback=&PL_sv_undef)
		1612	PPCODE:
		1613	{
		1614	dREQ;
		1615
		1616	req->type = EIO_GROUP;
		1617
		1618	req_submit (req);
		1619	XPUSHs (req_sv (req, aio_grp_stash));
		1620	}
		1621
		1622	void
		1623	aio_nop (SV *callback=&PL_sv_undef)
		1624	ALIAS:
		1625	aio_nop = EIO_NOP
		1626	aio_sync = EIO_SYNC
		1627	PPCODE:
		1628	{
		1629	dREQ;
		1630
		1631	req->type = ix;
		1632
		1633	REQ_SEND;
		1634	}
		1635
		1636	int
		1637	aioreq_pri (int pri = 0)
		1638	CODE:
		1639	RETVAL = next_pri;
		1640	if (items > 0)
		1641	{
		1642	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1643	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1644	next_pri = pri;
		1645	}
		1646	OUTPUT:
		1647	RETVAL
		1648
		1649	void
		1650	aioreq_nice (int nice = 0)
		1651	CODE:
		1652	nice = next_pri - nice;
		1653	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1654	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1655	next_pri = nice;
1030		1656
1031	void	1657	void
1032	flush ()	1658	flush ()
1033	PROTOTYPE:
1034	CODE:	1659	CODE:
1035	while (nreqs)	1660	while (eio_nreqs ())
1036	{	1661	{
1037	poll_wait ();	1662	poll_wait ();
1038	poll_cb ();	1663	poll_cb ();
1039	}	1664	}
1040		1665
1041	void	1666	int
1042	poll()	1667	poll ()
1043	PROTOTYPE:
1044	CODE:	1668	CODE:
1045	if (nreqs)
1046	{
1047	poll_wait ();	1669	poll_wait ();
1048	poll_cb ();	1670	RETVAL = poll_cb ();
1049	}
1050
1051	int
1052	poll_fileno()
1053	PROTOTYPE:
1054	CODE:
1055	RETVAL = respipe [0];
1056	OUTPUT:	1671	OUTPUT:
1057	RETVAL	1672	RETVAL
1058		1673
1059	int	1674	int
		1675	poll_fileno ()
		1676	CODE:
		1677	RETVAL = s_epipe_fd (&respipe);
		1678	OUTPUT:
		1679	RETVAL
		1680
		1681	int
1060	poll_cb(...)	1682	poll_cb (...)
1061	PROTOTYPE:	1683	PROTOTYPE:
1062	CODE:	1684	CODE:
1063	RETVAL = poll_cb ();	1685	RETVAL = poll_cb ();
1064	OUTPUT:	1686	OUTPUT:
1065	RETVAL	1687	RETVAL
1066		1688
1067	void	1689	void
1068	poll_wait()	1690	poll_wait ()
1069	PROTOTYPE:
1070	CODE:	1691	CODE:
1071	if (nreqs)
1072	poll_wait ();	1692	poll_wait ();
1073		1693
1074	int	1694	int
1075	nreqs()	1695	nreqs ()
1076	PROTOTYPE:
1077	CODE:	1696	CODE:
1078	RETVAL = nreqs;	1697	RETVAL = eio_nreqs ();
1079	OUTPUT:	1698	OUTPUT:
1080	RETVAL	1699	RETVAL
1081		1700
		1701	int
		1702	nready ()
		1703	CODE:
		1704	RETVAL = eio_nready ();
		1705	OUTPUT:
		1706	RETVAL
		1707
		1708	int
		1709	npending ()
		1710	CODE:
		1711	RETVAL = eio_npending ();
		1712	OUTPUT:
		1713	RETVAL
		1714
		1715	int
		1716	nthreads ()
		1717	CODE:
		1718	RETVAL = eio_nthreads ();
		1719	OUTPUT:
		1720	RETVAL
		1721
		1722	int
		1723	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1724	CODE:
		1725	RETVAL = posix_fadvise (fh, offset, length, advice);
		1726	OUTPUT:
		1727	RETVAL
		1728
		1729	IV
		1730	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1731	CODE:
		1732	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1733	OUTPUT:
		1734	RETVAL
		1735
		1736	void
		1737	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1738	PPCODE:
		1739	sv_unmagic (scalar, MMAP_MAGIC);
		1740	{
		1741	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1742	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1743	if (addr == (void *)-1)
		1744	XSRETURN_NO;
		1745
		1746	sv_force_normal (scalar);
		1747
		1748	/* we store the length in mg_obj, as namlen is I32 :/ */
		1749	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1750	->mg_obj = (SV *)length;
		1751
		1752	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1753
		1754	if (!(prot & PROT_WRITE))
		1755	SvREADONLY_on (scalar);
		1756
		1757	if (SvLEN (scalar))
		1758	Safefree (SvPVX (scalar));
		1759
		1760	SvPVX (scalar) = (char *)addr;
		1761	SvCUR_set (scalar, length);
		1762	SvLEN_set (scalar, 0);
		1763	SvPOK_only (scalar);
		1764
		1765	XSRETURN_YES;
		1766	}
		1767
		1768	void
		1769	munmap (SV *scalar)
		1770	CODE:
		1771	sv_unmagic (scalar, MMAP_MAGIC);
		1772
		1773	int
		1774	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1775	ALIAS:
		1776	mprotect = 1
		1777	CODE:
		1778	{
		1779	STRLEN svlen;
		1780	void *addr = SvPVbyte (scalar, svlen);
		1781	size_t len = SvUV (length);
		1782
		1783	if (offset < 0)
		1784	offset += svlen;
		1785
		1786	if (offset < 0 || offset > svlen)
		1787	croak ("offset outside of scalar");
		1788
		1789	if (!SvOK (length) || len + offset > svlen)
		1790	len = svlen - offset;
		1791
		1792	addr = (void *)(((intptr_t)addr) + offset);
		1793	eio_page_align (&addr, &len);
		1794
		1795	switch (ix)
		1796	{
		1797	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1798	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1799	}
		1800	}
		1801	OUTPUT:
		1802	RETVAL
		1803
		1804	int
		1805	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1806	CODE:
		1807	{
		1808	STRLEN svlen;
		1809	void *addr = SvPVbyte (scalar, svlen);
		1810	size_t len = SvUV (length);
		1811
		1812	if (offset < 0)
		1813	offset += svlen;
		1814
		1815	if (offset < 0 || offset > svlen)
		1816	croak ("offset outside of scalar");
		1817
		1818	if (!SvOK (length) || len + offset > svlen)
		1819	len = svlen - offset;
		1820
		1821	addr = (void *)(((intptr_t)addr) + offset);
		1822	eio_page_align (&addr, &len);
		1823	#if _POSIX_MEMLOCK_RANGE
		1824	RETVAL = munlock (addr, len);
		1825	#else
		1826	RETVAL = EIO_ENOSYS ();
		1827	#endif
		1828	}
		1829	OUTPUT:
		1830	RETVAL
		1831
		1832	int
		1833	munlockall ()
		1834	CODE:
		1835	#if _POSIX_MEMLOCK
		1836	munlockall ();
		1837	#else
		1838	RETVAL = EIO_ENOSYS ();
		1839	#endif
		1840	OUTPUT:
		1841	RETVAL
		1842
		1843	int
		1844	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1845	CODE:
		1846	{
		1847	#if HAVE_LINUX_SPLICE
		1848	loff_t off_in_, off_out_;
		1849	RETVAL = splice (
		1850	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1851	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1852	length, flags
		1853	);
		1854	#else
		1855	RETVAL = EIO_ENOSYS ();
		1856	#endif
		1857	}
		1858	OUTPUT:
		1859	RETVAL
		1860
		1861	int
		1862	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1863	CODE:
		1864	#if HAVE_LINUX_SPLICE
		1865	RETVAL = tee (rfh, wfh, length, flags);
		1866	#else
		1867	RETVAL = EIO_ENOSYS ();
		1868	#endif
		1869	OUTPUT:
		1870	RETVAL
		1871
		1872	void _on_next_submit (SV *cb)
		1873	CODE:
		1874	SvREFCNT_dec (on_next_submit);
		1875	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1876
		1877	PROTOTYPES: DISABLE
		1878
		1879	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1880
		1881	BOOT:
		1882	{
		1883	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1884	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1885	}
		1886
		1887	void
		1888	DESTROY (SV *self)
		1889	CODE:
		1890	{
		1891	aio_wd wd = SvAIO_WD (self);
		1892	#if HAVE_AT
		1893	{
		1894	SV *callback = &PL_sv_undef;
		1895	dREQ; /* clobbers next_pri :/ */
		1896	next_pri = req->pri; /* restore next_pri */
		1897	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1898	req->type = EIO_WD_CLOSE;
		1899	req->wd = wd;
		1900	REQ_SEND;
		1901	}
		1902	#else
		1903	eio_wd_close_sync (wd);
		1904	#endif
		1905	}
		1906
		1907	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1908
		1909	void
		1910	cancel (aio_req_ornot req)
		1911	CODE:
		1912	eio_cancel (req);
		1913
		1914	void
		1915	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1916	PPCODE:
		1917	{
		1918	if (GIMME_V != G_VOID)
		1919	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1920
		1921	if (items > 1)
		1922	{
		1923	SV *cb_cv =get_cb (callback);
		1924
		1925	SvREFCNT_dec (req->callback);
		1926	req->callback = SvREFCNT_inc (cb_cv);
		1927	}
		1928	}
		1929
		1930	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1931
		1932	void
		1933	add (aio_req grp, ...)
		1934	PPCODE:
		1935	{
		1936	int i;
		1937
		1938	if (grp->int1 == 2)
		1939	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1940
		1941	for (i = 1; i < items; ++i )
		1942	{
		1943	aio_req req;
		1944
		1945	if (GIMME_V != G_VOID)
		1946	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1947
		1948	req = SvAIO_REQ (ST (i));
		1949
		1950	if (req)
		1951	eio_grp_add (grp, req);
		1952	}
		1953	}
		1954
		1955	void
		1956	cancel_subs (aio_req_ornot req)
		1957	CODE:
		1958	req_cancel_subs (req);
		1959
		1960	void
		1961	result (aio_req grp, ...)
		1962	CODE:
		1963	{
		1964	int i;
		1965	AV *av;
		1966
		1967	grp->errorno = errno;
		1968
		1969	av = newAV ();
		1970	av_extend (av, items - 1);
		1971
		1972	for (i = 1; i < items; ++i )
		1973	av_push (av, newSVsv (ST (i)));
		1974
		1975	SvREFCNT_dec (grp->sv1);
		1976	grp->sv1 = (SV *)av;
		1977	}
		1978
		1979	void
		1980	errno (aio_req grp, int errorno = errno)
		1981	CODE:
		1982	grp->errorno = errorno;
		1983
		1984	void
		1985	limit (aio_req grp, int limit)
		1986	CODE:
		1987	eio_grp_limit (grp, limit);
		1988
		1989	void
		1990	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1991	CODE:
		1992	{
		1993	SvREFCNT_dec (grp->sv2);
		1994	grp->sv2 = newSVsv (callback);
		1995	grp->feed = aio_grp_feed;
		1996
		1997	if (grp->int2 <= 0)
		1998	grp->int2 = 2;
		1999
		2000	eio_grp_limit (grp, grp->int2);
		2001	}
		2002

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