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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.38 by root, Sun Aug 28 10:51:33 2005 UTC vs.
Revision 1.231 by root, Wed Feb 11 19:32:36 2015 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
22	# if __linux
23	# include <sys/sendfile.h>
24	# elif __freebsd
25	# include <sys/socket.h>
26	# include <sys/uio.h>	21	# include <sys/mman.h>
27	# elif __hpux	22	#endif
		23
		24	/* the incompetent fool that created musl keeps __linux__, refuses
		25	* to implement any linux standard apis, and also has no way to test
		26	* for his broken iplementation. on't complain if this fails for you.
		27	*/
		28	#if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
		29	# include <linux/fs.h>
		30	# ifdef FS_IOC_FIEMAP
		31	# include <linux/types.h>
		32	# include <linux/fiemap.h>
		33	# define HAVE_FIEMAP 1
		34	# endif
		35	#endif
		36
		37	/* perl namespace pollution */
		38	#undef VERSION
		39
		40	/* perl stupidly overrides readdir and maybe others */
		41	/* with thread-unsafe versions, imagine that :( */
		42	#undef readdir
		43	#undef opendir
		44	#undef closedir
		45
		46	#ifdef _WIN32
		47
		48	// perl overrides all those nice libc functions
		49
		50	#undef malloc
		51	#undef free
		52	#undef open
		53	#undef read
		54	#undef write
		55	#undef send
		56	#undef recv
		57	#undef stat
		58	#undef lstat
		59	#undef fstat
		60	#undef truncate
		61	#undef ftruncate
		62	#undef open
		63	#undef link
		64	#undef close
		65	#undef unlink
		66	#undef mkdir
		67	#undef rmdir
		68	#undef rename
		69	#undef lseek
		70	#undef opendir
		71	#undef readdir
		72	#undef closedir
		73	#undef chmod
		74	#undef fchmod
		75	#undef dup
		76	#undef dup2
		77	#undef abort
		78	#undef pipe
		79
		80	#define EIO_STRUCT_STAT struct _stati64
		81	#define EIO_STRUCT_STATI64
		82
		83	#else
		84
28	# include <sys/socket.h>	85	#include <sys/time.h>
29	# elif __solaris /* not yet */
30	# include <sys/sendfile.h>	86	#include <sys/select.h>
		87	#include <unistd.h>
		88	#include <utime.h>
		89	#include <signal.h>
		90
		91	#define EIO_STRUCT_STAT Stat_t
		92
		93	#endif
		94
		95	/*****************************************************************************/
		96
		97	#if __GNUC__ >= 3
		98	# define expect(expr,value) __builtin_expect ((expr),(value))
		99	#else
		100	# define expect(expr,value) (expr)
		101	#endif
		102
		103	#define expect_false(expr) expect ((expr) != 0, 0)
		104	#define expect_true(expr) expect ((expr) != 0, 1)
		105
		106	/*****************************************************************************/
		107
		108	typedef SV SV8; /* byte-sv, used for argument-checking */
		109	typedef int aio_rfd; /* read file desriptor */
		110	typedef int aio_wfd; /* write file descriptor */
		111
		112	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		113
		114	#define EIO_REQ_MEMBERS \
		115	SV *callback; \
		116	SV *sv1, *sv2; \
		117	SV *sv3, *sv4; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/config.h"
		124	#include "libeio/eio.h"
		125
		126	static int req_invoke (eio_req *req);
		127	#define EIO_FINISH(req) req_invoke (req)
		128	static void req_destroy (eio_req *grp);
		129	#define EIO_DESTROY(req) req_destroy (req)
		130
		131	#include "libeio/eio.c"
		132
		133	#if !HAVE_POSIX_FADVISE
		134	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		135	#endif
		136
		137	#if !HAVE_POSIX_MADVISE
		138	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		139	#endif
		140
		141	#ifndef MAP_ANONYMOUS
		142	# ifdef MAP_ANON
		143	# define MAP_ANONYMOUS MAP_ANON
31	# else	144	# else
32	# error sendfile support requested but not available	145	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
33	# endif	146	# endif
34	#endif	147	#endif
35		148
36	#if __ia64	149	/* defines all sorts of constants to 0 unless they are already defined */
37	# define STACKSIZE 65536	150	#include "def0.h"
38	#else
39	# define STACKSIZE 8192
40	#endif
41		151
42	enum {	152	#ifndef makedev
43	REQ_QUIT,	153	# define makedev(maj,min) (((maj) << 8) | (min))
44	REQ_OPEN, REQ_CLOSE,	154	#endif
45	REQ_READ, REQ_WRITE, REQ_READAHEAD,	155	#ifndef major
46	REQ_SENDFILE,	156	# define major(dev) ((dev) >> 8)
47	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	157	#endif
48	REQ_FSYNC, REQ_FDATASYNC,	158	#ifndef minor
49	REQ_UNLINK, REQ_RMDIR,	159	# define minor(dev) ((dev) & 0xff)
50	REQ_READDIR,	160	#endif
51	REQ_SYMLINK,
52	};
53		161
54	typedef struct aio_cb {	162	#if PAGESIZE <= 0
55	struct aio_cb *volatile next;	163	# define PAGESIZE sysconf (_SC_PAGESIZE)
		164	#endif
56		165
57	int type;	166	/*****************************************************************************/
58
59	/* should receive a cleanup, with unions */
60	int fd, fd2;
61	off_t offset;
62	size_t length;
63	ssize_t result;
64	mode_t mode; /* open */
65	int errorno;
66	SV *data, *callback;
67	SV *fh, *fh2;
68	void *dataptr, *data2ptr;
69	STRLEN dataoffset;
70
71	Stat_t *statdata;
72	} aio_cb;
73
74	typedef aio_cb *aio_req;
75
76	static int started, wanted;
77	static volatile int nreqs;
78	static int max_outstanding = 1<<30;
79	static int respipe [2];
80
81	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
82	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
83	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
84
85	static volatile aio_req reqs, reqe; /* queue start, queue end */
86	static volatile aio_req ress, rese; /* queue start, queue end */
87
88	static void free_req (aio_req req)
89	{
90	if (req->data)
91	SvREFCNT_dec (req->data);
92
93	if (req->fh)
94	SvREFCNT_dec (req->fh);
95
96	if (req->fh2)
97	SvREFCNT_dec (req->fh2);
98
99	if (req->statdata)
100	Safefree (req->statdata);
101
102	if (req->callback)
103	SvREFCNT_dec (req->callback);
104
105	if (req->type == REQ_READDIR && req->result >= 0)
106	free (req->data2ptr);
107
108	Safefree (req);
109	}
110		167
111	static void	168	static void
112	poll_wait ()	169	fiemap (eio_req *req)
113	{	170	{
114	if (nreqs && !ress)	171	req->result = -1;
115	{
116	fd_set rfd;
117	FD_ZERO(&rfd);
118	FD_SET(respipe [0], &rfd);
119		172
120	select (respipe [0] + 1, &rfd, 0, 0, 0);	173	#if HAVE_FIEMAP
121	}	174	/* assume some c99 */
122	}	175	struct fiemap *fiemap = 0;
		176	size_t end_offset;
		177	int count = req->int3;
123		178
124	static int	179	req->flags |= EIO_FLAG_PTR1_FREE;
125	poll_cb ()	180
126	{	181	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
127	dSP;	182	/* increase in 3.5kb steps */
		183	if (count < 0)
128	int count = 0;	184	count = 8;
129	int do_croak = 0;	185
130	aio_req req;	186	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		187	errno = ENOMEM;
		188	if (!fiemap)
		189	return;
		190
		191	req->ptr1 = fiemap;
		192
		193	fiemap->fm_start = req->offs;
		194	fiemap->fm_length = req->size;
		195	fiemap->fm_flags = req->int2;
		196	fiemap->fm_extent_count = count;
		197
		198	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
		199	return;
		200
		201	if (req->int3 >= 0 /* not autosizing */
		202	|| !fiemap->fm_mapped_extents /* no more extents */
		203	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
		204	goto done;
		205
		206	/* else we have to loop -
		207	* it would be tempting (actually I tried that first) to just query the
		208	* number of extents needed, but linux often feels like not returning all
		209	* extents, without telling us it left any out. this complicates
		210	* this quite a bit.
		211	*/
		212
		213	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
131		214
132	for (;;)	215	for (;;)
133	{	216	{
134	pthread_mutex_lock (&reslock);	217	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
135	req = ress;	218	char scratch[3072];
		219	struct fiemap *incmap = (struct fiemap *)scratch;
136		220
		221	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
		222	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
		223	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
		224	incmap->fm_flags = fiemap->fm_flags;
		225	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
		226
		227	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
		228	return;
		229
		230	if (!incmap->fm_mapped_extents)
		231	goto done;
		232
		233	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
		234	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		235	errno = ENOMEM;
137	if (req)	236	if (!fiemap)
		237	return;
		238
		239	req->ptr1 = fiemap;
		240
		241	for (count = 0; count < incmap->fm_mapped_extents; ++count)
138	{	242	{
139	ress = req->next;	243	struct fiemap_extent *e = incmap->fm_extents + count;
140		244
141	if (!ress)	245	if (e->fe_logical + e->fe_length >= end_offset)
142	{	246	goto done;
143	/* read any signals sent by the worker threads */
144	char buf [32];
145	while (read (respipe [0], buf, 32) == 32)
146	;
147		247
148	rese = 0;	248	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
149	}
150	}
151		249
152	pthread_mutex_unlock (&reslock);	250	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		251	goto done;
153		252
154	if (!req)
155	break;
156
157	nreqs--;
158
159	if (req->type == REQ_QUIT)
160	started--;
161	else
162	{
163	int errorno = errno;
164	errno = req->errorno;
165
166	if (req->type == REQ_READ)
167	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
168
169	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
170	SvREADONLY_off (req->data);
171
172	if (req->statdata)
173	{
174	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
175	PL_laststatval = req->result;
176	PL_statcache = *(req->statdata);
177	}
178
179	ENTER;
180	PUSHMARK (SP);
181
182	if (req->type == REQ_READDIR)
183	{
184	SV *rv = &PL_sv_undef;
185
186	if (req->result >= 0)
187	{
188	char *buf = req->data2ptr;
189	AV *av = newAV ();
190
191	while (req->result)
192	{
193	SV *sv = newSVpv (buf, 0);
194
195	av_push (av, sv);
196	buf += SvCUR (sv) + 1;
197	req->result--;
198	}
199
200	rv = sv_2mortal (newRV_noinc ((SV *)av));
201	}
202
203	XPUSHs (rv);
204	}
205	else
206	{
207	XPUSHs (sv_2mortal (newSViv (req->result)));
208
209	if (req->type == REQ_OPEN)
210	{
211	/* convert fd to fh */
212	SV *fh;
213
214	PUTBACK;
215	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
216	SPAGAIN;
217
218	fh = SvREFCNT_inc (POPs);
219
220	PUSHMARK (SP);
221	XPUSHs (sv_2mortal (fh));
222	}
223	}
224
225	if (SvOK (req->callback))
226	{
227	PUTBACK;
228	call_sv (req->callback, G_VOID | G_EVAL);
229	SPAGAIN;
230
231	if (SvTRUE (ERRSV))
232	{
233	free_req (req);
234	croak (0);
235	}
236	}
237
238	LEAVE;
239
240	errno = errorno;
241	count++;
242	}
243
244	free_req (req);
245	}
246
247	return count;
248	}
249
250	static void *aio_proc(void *arg);
251
252	static void
253	start_thread (void)
254	{
255	sigset_t fullsigset, oldsigset;
256	pthread_t tid;
257	pthread_attr_t attr;
258
259	pthread_attr_init (&attr);
260	pthread_attr_setstacksize (&attr, STACKSIZE);
261	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
262
263	sigfillset (&fullsigset);
264	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
265
266	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
267	started++;
268
269	sigprocmask (SIG_SETMASK, &oldsigset, 0);
270	}
271
272	static void
273	send_req (aio_req req)
274	{
275	while (started < wanted && nreqs >= started)
276	start_thread ();
277
278	nreqs++;
279
280	pthread_mutex_lock (&reqlock);
281
282	req->next = 0;
283
284	if (reqe)
285	{
286	reqe->next = req;
287	reqe = req;
288	}
289	else
290	reqe = reqs = req;
291
292	pthread_cond_signal (&reqwait);
293	pthread_mutex_unlock (&reqlock);
294
295	if (nreqs > max_outstanding)
296	for (;;)
297	{
298	poll_cb ();
299
300	if (nreqs <= max_outstanding)
301	break;
302
303	poll_wait ();
304	}
305	}
306
307	static void
308	end_thread (void)
309	{
310	aio_req req;
311	Newz (0, req, 1, aio_cb);
312	req->type = REQ_QUIT;
313
314	send_req (req);
315	}
316
317	static void min_parallel (int nthreads)
318	{
319	if (wanted < nthreads)
320	wanted = nthreads;
321	}
322
323	static void max_parallel (int nthreads)
324	{
325	int cur = started;
326
327	if (wanted > nthreads)
328	wanted = nthreads;
329
330	while (cur > wanted)
331	{
332	end_thread ();
333	cur--;
334	}
335
336	while (started > wanted)
337	{
338	poll_wait ();
339	poll_cb ();
340	}
341	}
342
343	static void create_pipe ()
344	{
345	if (pipe (respipe))
346	croak ("unable to initialize result pipe");
347
348	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
349	croak ("cannot set result pipe to nonblocking mode");
350
351	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
352	croak ("cannot set result pipe to nonblocking mode");
353	}
354
355	/*****************************************************************************/
356	/* work around various missing functions */
357
358	#if !HAVE_PREADWRITE
359	# define pread aio_pread
360	# define pwrite aio_pwrite
361
362	/*
363	* make our pread/pwrite safe against themselves, but not against
364	* normal read/write by using a mutex. slows down execution a lot,
365	* but that's your problem, not mine.
366	*/
367	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
368
369	static ssize_t
370	pread (int fd, void *buf, size_t count, off_t offset)
371	{
372	ssize_t res;
373	off_t ooffset;
374
375	pthread_mutex_lock (&preadwritelock);
376	ooffset = lseek (fd, 0, SEEK_CUR);
377	lseek (fd, offset, SEEK_SET);
378	res = read (fd, buf, count);
379	lseek (fd, ooffset, SEEK_SET);
380	pthread_mutex_unlock (&preadwritelock);
381
382	return res;
383	}
384
385	static ssize_t
386	pwrite (int fd, void *buf, size_t count, off_t offset)
387	{
388	ssize_t res;
389	off_t ooffset;
390
391	pthread_mutex_lock (&preadwritelock);
392	ooffset = lseek (fd, 0, SEEK_CUR);
393	lseek (fd, offset, SEEK_SET);
394	res = write (fd, buf, count);
395	lseek (fd, offset, SEEK_SET);
396	pthread_mutex_unlock (&preadwritelock);
397
398	return res;
399	}
400	#endif
401
402	#if !HAVE_FDATASYNC
403	# define fdatasync fsync
404	#endif
405
406	#if !HAVE_READAHEAD
407	# define readahead aio_readahead
408
409	static ssize_t
410	readahead (int fd, off_t offset, size_t count)
411	{
412	char readahead_buf[4096];
413
414	while (count > 0)
415	{
416	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
417
418	pread (fd, readahead_buf, len, offset);
419	offset += len;
420	count -= len;
421	}
422
423	errno = 0;
424	}
425	#endif
426
427	#if !HAVE_READDIR_R
428	# define readdir_r aio_readdir_r
429
430	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
431
432	static int
433	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
434	{
435	struct dirent *e;
436	int errorno;
437
438	pthread_mutex_lock (&readdirlock);
439
440	e = readdir (dirp);
441	errorno = errno;
442
443	if (e)
444	{
445	*res = ent;
446	strcpy (ent->d_name, e->d_name);
447	}
448	else
449	*res = 0;
450
451	pthread_mutex_unlock (&readdirlock);
452
453	errno = errorno;
454	return e ? 0 : -1;
455	}
456	#endif
457
458	/* sendfile always needs emulation */
459	static ssize_t
460	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
461	{
462	ssize_t res;
463
464	if (!count)
465	return 0;
466
467	#if HAVE_SENDFILE
468	# if __linux
469	res = sendfile (ofd, ifd, &offset, count);
470
471	# elif __freebsd
472	/*
473	* Of course, the freebsd sendfile is a dire hack with no thoughts
474	* wasted on making it similar to other I/O functions.
475	*/
476	{
477	off_t sbytes;
478	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
479
480	if (res < 0 && sbytes)
481	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
482	res = sbytes;
483	}
484
485	# elif __hpux
486	res = sendfile (ofd, ifd, offset, count, 0, 0);
487
488	# elif __solaris
489	{
490	struct sendfilevec vec;
491	size_t sbytes;
492
493	vec.sfv_fd = ifd;
494	vec.sfv_flag = 0;
495	vec.sfv_off = offset;
496	vec.sfv_len = count;
497
498	res = sendfilev (ofd, &vec, 1, &sbytes);
499
500	if (res < 0 && sbytes)
501	res = sbytes;
502	}
503
504	# endif
505	#else
506	res = -1;
507	errno = ENOSYS;
508	#endif
509
510	if (res < 0
511	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
512	#if __solaris
513	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
514	#endif
515	)
516	)
517	{
518	/* emulate sendfile. this is a major pain in the ass */
519	char buf[4096];
520	res = 0;
521
522	while (count)
523	{
524	ssize_t cnt;
525
526	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
527
528	if (cnt <= 0)
529	{
530	if (cnt && !res) res = -1;
531	break;
532	}
533
534	cnt = write (ofd, buf, cnt);
535
536	if (cnt <= 0)
537	{
538	if (cnt && !res) res = -1;
539	break;
540	}
541
542	offset += cnt;
543	res += cnt;
544	count -= cnt;
545	}	253	}
546	}	254	}
547		255
548	return res;	256	done:
549	}	257	req->result = 0;
550		258
551	/* read a full directory */	259	#else
		260	errno = ENOSYS;
		261	#endif
		262	}
		263
		264	/*****************************************************************************/
		265
		266	enum {
		267	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		268	};
		269
		270	typedef eio_req *aio_req;
		271	typedef eio_req *aio_req_ornot;
		272	typedef eio_wd aio_wd;
		273
		274	static SV *on_next_submit;
		275	static int next_pri = EIO_PRI_DEFAULT;
		276	static int max_outstanding;
		277
		278	static s_epipe respipe;
		279
		280	static void req_destroy (aio_req req);
		281	static void req_cancel (aio_req req);
		282
		283	static void
		284	want_poll (void)
		285	{
		286	/* write a dummy byte to the pipe so fh becomes ready */
		287	s_epipe_signal (&respipe);
		288	}
		289
		290	static void
		291	done_poll (void)
		292	{
		293	/* read any signals sent by the worker threads */
		294	s_epipe_drain (&respipe);
		295	}
		296
		297	/* must be called at most once */
		298	static SV *
		299	req_sv (aio_req req, HV *stash)
		300	{
		301	if (!req->self)
		302	{
		303	req->self = (SV *)newHV ();
		304	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		305	}
		306
		307	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		308	}
		309
		310	static SV *
		311	newSVaio_wd (aio_wd wd)
		312	{
		313	return sv_bless (newRV_noinc (newSViv ((intptr_t)wd)), aio_wd_stash);
		314	}
		315
		316	static aio_req
		317	SvAIO_REQ (SV *sv)
		318	{
		319	MAGIC *mg;
		320
		321	if (!SvROK (sv)
		322	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		323	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		324	&& SvSTASH (SvRV (sv)) != aio_req_stash
		325	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		326	croak ("object of class IO::AIO::REQ expected");
		327
		328	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		329
		330	return mg ? (aio_req)mg->mg_ptr : 0;
		331	}
		332
		333	static aio_wd
		334	SvAIO_WD (SV *sv)
		335	{
		336	if (!SvROK (sv)
		337	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		338	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		339	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		340
		341	return (aio_wd)(long)SvIVX (SvRV (sv));
		342	}
		343
		344	static void
		345	aio_grp_feed (aio_req grp)
		346	{
		347	if (grp->sv2 && SvOK (grp->sv2))
		348	{
		349	dSP;
		350
		351	ENTER;
		352	SAVETMPS;
		353	PUSHMARK (SP);
		354	XPUSHs (req_sv (grp, aio_grp_stash));
		355	PUTBACK;
		356	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		357	SPAGAIN;
		358	FREETMPS;
		359	LEAVE;
		360	}
		361	}
		362
		363	static void
		364	req_submit (eio_req *req)
		365	{
		366	eio_submit (req);
		367
		368	if (expect_false (on_next_submit))
		369	{
		370	dSP;
		371	SV *cb = sv_2mortal (on_next_submit);
		372
		373	on_next_submit = 0;
		374
		375	PUSHMARK (SP);
		376	PUTBACK;
		377	call_sv (cb, G_DISCARD | G_EVAL);
		378	}
		379	}
		380
552	static int	381	static int
553	scandir_ (const char *path, void **namesp)	382	req_invoke (eio_req *req)
554	{	383	{
555	DIR *dirp = opendir (path);	384	if (req->flags & FLAG_SV2_RO_OFF)
556	union	385	SvREADONLY_off (req->sv2);
557	{
558	struct dirent d;
559	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
560	} u;
561	struct dirent *entp;
562	char *name, *names;
563	int memlen = 4096;
564	int memofs = 0;
565	int res = 0;
566	int errorno;
567		386
568	if (!dirp)	387	if (!EIO_CANCELLED (req) && req->callback)
569	return -1;
570
571	names = malloc (memlen);
572
573	for (;;)
574	{	388	{
575	errno = 0, readdir_r (dirp, &u.d, &entp);	389	dSP;
		390	static SV *sv_result_cache; /* caches the result integer SV */
		391	SV *sv_result;
576		392
577	if (!entp)	393	ENTER;
578	break;	394	SAVETMPS;
		395	PUSHMARK (SP);
		396	EXTEND (SP, 1);
579		397
580	name = entp->d_name;	398	/* do not recreate the result IV from scratch each time */
581		399	if (expect_true (sv_result_cache))
582	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
583	{	400	{
584	int len = strlen (name) + 1;	401	sv_result = sv_result_cache; sv_result_cache = 0;
585		402	SvIV_set (sv_result, req->result);
586	res++;	403	SvIOK_only (sv_result);
587
588	while (memofs + len > memlen)
589	{
590	memlen *= 2;
591	names = realloc (names, memlen);
592	if (!names)
593	break;
594	}
595
596	memcpy (names + memofs, name, len);
597	memofs += len;
598	}
599	}
600
601	errorno = errno;
602	closedir (dirp);
603
604	if (errorno)
605	{
606	free (names);
607	errno = errorno;
608	res = -1;
609	}
610
611	*namesp = (void *)names;
612	return res;
613	}
614
615	/*****************************************************************************/
616
617	static void *
618	aio_proc (void *thr_arg)
619	{
620	aio_req req;
621	int type;
622
623	do
624	{
625	pthread_mutex_lock (&reqlock);
626
627	for (;;)
628	{
629	req = reqs;
630
631	if (reqs)
632	{
633	reqs = reqs->next;
634	if (!reqs) reqe = 0;
635	}
636
637	if (req)
638	break;
639
640	pthread_cond_wait (&reqwait, &reqlock);
641	}
642
643	pthread_mutex_unlock (&reqlock);
644
645	errno = 0; /* strictly unnecessary */
646
647	type = req->type;
648
649	switch (type)
650	{
651	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
652	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
653
654	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
655	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
656
657	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
658	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
659	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
660
661	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
662	case REQ_CLOSE: req->result = close (req->fd); break;
663	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
664	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
665	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
666
667	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
668	case REQ_FSYNC: req->result = fsync (req->fd); break;
669	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
670
671	case REQ_QUIT:
672	break;
673
674	default:
675	req->result = ENOSYS;
676	break;
677	}
678
679	req->errorno = errno;
680
681	pthread_mutex_lock (&reslock);
682
683	req->next = 0;
684
685	if (rese)
686	{
687	rese->next = req;
688	rese = req;
689	}	404	}
690	else	405	else
691	{	406	{
692	rese = ress = req;	407	sv_result = newSViv (req->result);
693		408	SvREADONLY_on (sv_result);
694	/* write a dummy byte to the pipe so fh becomes ready */
695	write (respipe [1], &respipe, 1);
696	}	409	}
697		410
698	pthread_mutex_unlock (&reslock);	411	switch (req->type)
		412	{
		413	case EIO_WD_OPEN:
		414	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		415	break;
		416
		417	case EIO_READDIR:
		418	{
		419	SV *rv = &PL_sv_undef;
		420
		421	if (req->result >= 0)
		422	{
		423	int i;
		424	char *names = (char *)req->ptr2;
		425	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		426	AV *av = newAV ();
		427
		428	av_extend (av, req->result - 1);
		429
		430	for (i = 0; i < req->result; ++i)
		431	{
		432	if (req->int1 & EIO_READDIR_DENTS)
		433	{
		434	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		435
		436	if (req->int1 & EIO_READDIR_CUSTOM2)
		437	{
		438	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		439	AV *avent = newAV ();
		440
		441	av_extend (avent, 2);
		442
		443	if (!sv_type [ent->type])
		444	{
		445	sv_type [ent->type] = newSViv (ent->type);
		446	SvREADONLY_on (sv_type [ent->type]);
		447	}
		448
		449	av_store (avent, 0, namesv);
		450	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		451	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		452
		453	av_store (av, i, newRV_noinc ((SV *)avent));
		454	}
		455	else
		456	av_store (av, i, namesv);
		457
		458	++ent;
		459	}
		460	else
		461	{
		462	SV *name = newSVpv (names, 0);
		463	av_store (av, i, name);
		464	names += SvCUR (name) + 1;
		465	}
		466	}
		467
		468	rv = sv_2mortal (newRV_noinc ((SV *)av));
		469	}
		470
		471	PUSHs (rv);
		472
		473	if (req->int1 & EIO_READDIR_CUSTOM1)
		474	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		475	}
		476	break;
		477
		478	case EIO_OPEN:
		479	{
		480	/* convert fd to fh */
		481	SV *fh = &PL_sv_undef;
		482
		483	if (req->result >= 0)
		484	{
		485	GV *gv = (GV *)sv_newmortal ();
		486	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		487	char sym [64];
		488	int symlen;
		489
		490	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		491	gv_init (gv, aio_stash, sym, symlen, 0);
		492
		493	symlen = snprintf (
		494	sym,
		495	sizeof (sym),
		496	"%s&=%d",
		497	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		498	(int)req->result
		499	);
		500
		501	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		502	fh = (SV *)gv;
		503	}
		504
		505	PUSHs (fh);
		506	}
		507	break;
		508
		509	case EIO_STATVFS:
		510	case EIO_FSTATVFS:
		511	{
		512	SV *rv = &PL_sv_undef;
		513
		514	#ifndef _WIN32
		515	if (req->result >= 0)
		516	{
		517	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		518	HV *hv = newHV ();
		519	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		520	* chooses to make it a struct.
		521	*/
		522	unsigned long fsid = 0;
		523	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
		524
		525	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		526
		527	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		528	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		529	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		530	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		531	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		532	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		533	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		534	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		535	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		536	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		537	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		538	}
		539	#endif
		540
		541	PUSHs (rv);
		542	}
		543
		544	break;
		545
		546	case EIO_GROUP:
		547	req->int1 = 2; /* mark group as finished */
		548
		549	if (req->sv1)
		550	{
		551	int i;
		552	AV *av = (AV *)req->sv1;
		553
		554	EXTEND (SP, AvFILL (av) + 1);
		555	for (i = 0; i <= AvFILL (av); ++i)
		556	PUSHs (*av_fetch (av, i, 0));
		557	}
		558	break;
		559
		560	case EIO_NOP:
		561	case EIO_BUSY:
		562	break;
		563
		564	case EIO_READLINK:
		565	case EIO_REALPATH:
		566	if (req->result > 0)
		567	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		568	break;
		569
		570	case EIO_STAT:
		571	case EIO_LSTAT:
		572	case EIO_FSTAT:
		573	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		574
		575	if (!(PL_laststatval = req->result))
		576	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		577	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		578
		579	PUSHs (sv_result);
		580	break;
		581
		582	case EIO_SEEK:
		583	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		584	break;
		585
		586	case EIO_READ:
		587	{
		588	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		589	*SvEND (req->sv2) = 0;
		590	SvPOK_only (req->sv2);
		591	SvSETMAGIC (req->sv2);
		592	PUSHs (sv_result);
		593	}
		594	break;
		595
		596	case EIO_CUSTOM:
		597	if (req->feed == fiemap)
		598	{
		599	#if HAVE_FIEMAP
		600	if (!req->result)
		601	{
		602	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		603
		604	if (fiemap->fm_extent_count)
		605	{
		606	AV *av = newAV ();
		607	int i;
		608
		609	while (fiemap->fm_mapped_extents)
		610	{
		611	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		612	AV *ext_av = newAV ();
		613
		614	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		615	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		616	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		617	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		618
		619	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		620	}
		621
		622	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		623	}
		624	else
		625	{
		626	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		627	PUSHs (sv_result);
		628	}
		629	}
		630	#endif
		631	}
		632	else
		633	PUSHs (sv_result);
		634	break;
		635
		636	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		637	if (req->result > 0)
		638	SvIV_set (sv_result, 0);
		639	/* FALLTHROUGH */
		640
		641	default:
		642	PUSHs (sv_result);
		643	break;
		644	}
		645
		646	errno = req->errorno;
		647
		648	PUTBACK;
		649	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		650	SPAGAIN;
		651
		652	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		653	SvREFCNT_dec (sv_result);
		654	else
		655	sv_result_cache = sv_result;
		656
		657	FREETMPS;
		658	LEAVE;
		659
		660	PUTBACK;
699	}	661	}
700	while (type != REQ_QUIT);	662
		663	return !!SvTRUE (ERRSV);
		664	}
		665
		666	static void
		667	req_destroy (aio_req req)
		668	{
		669	if (req->self)
		670	{
		671	sv_unmagic (req->self, PERL_MAGIC_ext);
		672	SvREFCNT_dec (req->self);
		673	}
		674
		675	SvREFCNT_dec (req->sv1);
		676	SvREFCNT_dec (req->sv2);
		677	SvREFCNT_dec (req->sv3);
		678	SvREFCNT_dec (req->sv4);
		679	SvREFCNT_dec (req->callback);
		680
		681	free (req);
		682	}
		683
		684	static void
		685	req_cancel_subs (aio_req grp)
		686	{
		687	if (grp->type != EIO_GROUP)
		688	return;
		689
		690	SvREFCNT_dec (grp->sv2);
		691	grp->sv2 = 0;
		692
		693	eio_grp_cancel (grp);
		694	}
		695
		696	static void ecb_cold
		697	create_respipe (void)
		698	{
		699	if (s_epipe_renew (&respipe))
		700	croak ("IO::AIO: unable to initialize result pipe");
		701	}
		702
		703	static void
		704	poll_wait (void)
		705	{
		706	while (eio_nreqs ())
		707	{
		708	int size;
		709
		710	X_LOCK (reslock);
		711	size = res_queue.size;
		712	X_UNLOCK (reslock);
		713
		714	if (size)
		715	return;
		716
		717	etp_maybe_start_thread ();
		718
		719	s_epipe_wait (&respipe);
		720	}
		721	}
		722
		723	static int
		724	poll_cb (void)
		725	{
		726	for (;;)
		727	{
		728	int res = eio_poll ();
		729
		730	if (res > 0)
		731	croak (0);
		732
		733	if (!max_outstanding || max_outstanding > eio_nreqs ())
		734	return res;
		735
		736	poll_wait ();
		737	}
		738	}
		739
		740	static void ecb_cold
		741	reinit (void)
		742	{
		743	create_respipe ();
		744
		745	if (eio_init (want_poll, done_poll) < 0)
		746	croak ("IO::AIO: unable to initialise eio library");
		747	}
		748
		749	/*****************************************************************************/
		750
		751	#if !_POSIX_MAPPED_FILES
		752	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		753	# define munmap(addr,length) EIO_ENOSYS ()
		754	#endif
		755
		756	#if !_POSIX_MEMORY_PROTECTION
		757	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		758	# define PROT_NONE 0
		759	# define PROT_WRITE 0
		760	# define MAP_PRIVATE 0
		761	# define MAP_SHARED 0
		762	# define MAP_FIXED 0
		763	#endif
		764
		765	#define MMAP_MAGIC PERL_MAGIC_ext
		766
		767	static int ecb_cold
		768	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		769	{
		770	int old_errno = errno;
		771	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		772	errno = old_errno;
		773
		774	mg->mg_obj = 0; /* just in case */
		775
		776	SvREADONLY_off (sv);
		777
		778	if (SvPVX (sv) != mg->mg_ptr)
		779	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		780
		781	SvCUR_set (sv, 0);
		782	SvPVX (sv) = 0;
		783	SvOK_off (sv);
701		784
702	return 0;	785	return 0;
703	}	786	}
704		787
		788	static MGVTBL mmap_vtbl = {
		789	0, 0, 0, 0, mmap_free
		790	};
		791
705	/*****************************************************************************/	792	/*****************************************************************************/
706		793
707	static void atfork_prepare (void)	794	static SV *
		795	get_cb (SV *cb_sv)
708	{	796	{
709	pthread_mutex_lock (&reqlock);	797	SvGETMAGIC (cb_sv);
710	pthread_mutex_lock (&reslock);	798	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
711	#if !HAVE_PREADWRITE
712	pthread_mutex_lock (&preadwritelock);
713	#endif
714	#if !HAVE_READDIR_R
715	pthread_mutex_lock (&readdirlock);
716	#endif
717	}	799	}
718		800
719	static void atfork_parent (void)	801	static aio_req ecb_noinline
		802	dreq (SV *callback)
720	{	803	{
721	#if !HAVE_READDIR_R	804	SV *cb_cv;
722	pthread_mutex_unlock (&readdirlock);
723	#endif
724	#if !HAVE_PREADWRITE
725	pthread_mutex_unlock (&preadwritelock);
726	#endif
727	pthread_mutex_unlock (&reslock);
728	pthread_mutex_unlock (&reqlock);
729	}
730
731	static void atfork_child (void)
732	{
733	aio_req prv;	805	aio_req req;
		806	int req_pri = next_pri;
		807	next_pri = EIO_PRI_DEFAULT;
734		808
735	started = 0;	809	cb_cv = get_cb (callback);
736		810
737	while (reqs)	811	req = calloc (sizeof (*req), 1);
		812	if (!req)
		813	croak ("out of memory during eio_req allocation");
		814
		815	req->callback = SvREFCNT_inc (cb_cv);
		816	req->pri = req_pri;
		817
		818	return req;
		819	}
		820
		821	#define dREQ \
		822	aio_req req = dreq (callback); \
		823
		824	#define REQ_SEND \
		825	PUTBACK; \
		826	req_submit (req); \
		827	SPAGAIN; \
		828	\
		829	if (GIMME_V != G_VOID) \
		830	XPUSHs (req_sv (req, aio_req_stash));
		831
		832	ecb_inline void
		833	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		834	{
		835	if (expect_false (SvROK (path)))
738	{	836	{
739	prv = reqs;	837	SV *rv = SvRV (path);
740	reqs = prv->next;	838	SV *wdob;
741	free_req (prv);	839
		840	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
		841	{
		842	path = AvARRAY (rv)[1];
		843	wdob = AvARRAY (rv)[0];
		844
		845	if (SvOK (wdob))
		846	{
		847	*wd = SvAIO_WD (wdob);
		848	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		849	}
		850	else
		851	*wd = EIO_INVALID_WD;
		852	}
		853	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		854	{
		855	*wd = (aio_wd)(long)SvIVX (rv);
		856	*wdsv = SvREFCNT_inc_NN (rv);
		857	*ptr = ".";
		858	return; /* path set to "." */
		859	}
		860	else
		861	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
742	}	862	}
743		863
744	reqs = reqe = 0;	864	*pathsv = newSVsv (path);
745		865	*ptr = SvPVbyte_nolen (*pathsv);
746	while (ress)	866	}
		867
		868	static void ecb_noinline
		869	req_set_path1 (aio_req req, SV *path)
		870	{
		871	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		872	}
		873
		874	static void ecb_noinline
		875	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		876	{
		877	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		878
		879	switch (SvTYPE (rv))
747	{	880	{
748	prv = ress;	881	case SVt_PVIO:
749	ress = prv->next;	882	case SVt_PVLV:
750	free_req (prv);	883	case SVt_PVGV:
		884	req->type = type_fh;
		885	req->sv1 = newSVsv (fh_or_path);
		886	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		887	break;
		888
		889	default:
		890	req->type = type_path;
		891	req_set_path1 (req, fh_or_path);
		892	break;
751	}	893	}
752
753	ress = rese = 0;
754
755	close (respipe [0]);
756	close (respipe [1]);
757	create_pipe ();
758
759	atfork_parent ();
760	}	894	}
761		895
762	#define dREQ \	896	XS(boot_IO__AIO) ecb_cold;
763	aio_req req; \	897
764	\
765	if (SvOK (callback) && !SvROK (callback)) \
766	croak ("clalback must be undef or of reference type"); \
767	\
768	Newz (0, req, 1, aio_cb); \
769	if (!req) \
770	croak ("out of memory during aio_req allocation"); \
771	\
772	req->callback = newSVsv (callback);
773
774	MODULE = IO::AIO PACKAGE = IO::AIO	898	MODULE = IO::AIO PACKAGE = IO::AIO
775		899
776	PROTOTYPES: ENABLE	900	PROTOTYPES: ENABLE
777		901
778	BOOT:	902	BOOT:
779	{	903	{
780	create_pipe ();	904	static const struct {
781	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	905	const char *name;
782	}	906	IV iv;
		907	} *civ, const_iv[] = {
		908	# define const_niv(name, value) { # name, (IV) value },
		909	# define const_iv(name) { # name, (IV) name },
		910	# define const_eio(name) { # name, (IV) EIO_ ## name },
783		911
		912	/* you have to re-run ./gendef0 after adding/Removing any constants here */
		913
		914	const_iv (ENOSYS)
		915	const_iv (EXDEV)
		916	const_iv (EBADR)
		917
		918	const_iv (O_RDONLY)
		919	const_iv (O_WRONLY)
		920	const_iv (O_RDWR)
		921	const_iv (O_CREAT)
		922	const_iv (O_TRUNC)
		923	const_iv (O_EXCL)
		924	const_iv (O_APPEND)
		925
		926	const_iv (O_ASYNC)
		927	const_iv (O_DIRECT)
		928	const_iv (O_NOATIME)
		929
		930	const_iv (O_CLOEXEC)
		931	const_iv (O_NOCTTY)
		932	const_iv (O_NOFOLLOW)
		933	const_iv (O_NONBLOCK)
		934	const_iv (O_EXEC)
		935	const_iv (O_SEARCH)
		936	const_iv (O_DIRECTORY)
		937	const_iv (O_DSYNC)
		938	const_iv (O_RSYNC)
		939	const_iv (O_SYNC)
		940	const_iv (O_TTY_INIT)
		941
		942	const_iv (S_IFIFO)
		943	const_iv (S_IFCHR)
		944	const_iv (S_IFBLK)
		945	const_iv (S_IFLNK)
		946	const_iv (S_IFREG)
		947	const_iv (S_IFDIR)
		948	const_iv (S_IFWHT)
		949	const_iv (S_IFSOCK)
		950	const_iv (S_IFMT)
		951
		952	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		953	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		954	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		955	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		956	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		957	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		958
		959	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		960	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		961	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		962	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		963	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		964
		965	const_iv (ST_RDONLY)
		966	const_iv (ST_NOSUID)
		967	const_iv (ST_NODEV)
		968	const_iv (ST_NOEXEC)
		969	const_iv (ST_SYNCHRONOUS)
		970	const_iv (ST_MANDLOCK)
		971	const_iv (ST_WRITE)
		972	const_iv (ST_APPEND)
		973	const_iv (ST_IMMUTABLE)
		974	const_iv (ST_NOATIME)
		975	const_iv (ST_NODIRATIME)
		976	const_iv (ST_RELATIME)
		977
		978	const_iv (PROT_NONE)
		979	const_iv (PROT_EXEC)
		980	const_iv (PROT_READ)
		981	const_iv (PROT_WRITE)
		982
		983	/*const_iv (MAP_FIXED)*/
		984	const_iv (MAP_PRIVATE)
		985	const_iv (MAP_SHARED)
		986	const_iv (MAP_ANONYMOUS)
		987
		988	/* linuxish */
		989	const_iv (MAP_HUGETLB)
		990	const_iv (MAP_LOCKED)
		991	const_iv (MAP_NORESERVE)
		992	const_iv (MAP_POPULATE)
		993	const_iv (MAP_NONBLOCK)
		994
		995	const_iv (FIEMAP_FLAG_SYNC)
		996	const_iv (FIEMAP_FLAG_XATTR)
		997	const_iv (FIEMAP_FLAGS_COMPAT)
		998	const_iv (FIEMAP_EXTENT_LAST)
		999	const_iv (FIEMAP_EXTENT_UNKNOWN)
		1000	const_iv (FIEMAP_EXTENT_DELALLOC)
		1001	const_iv (FIEMAP_EXTENT_ENCODED)
		1002	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		1003	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1004	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1005	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1006	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1007	const_iv (FIEMAP_EXTENT_MERGED)
		1008	const_iv (FIEMAP_EXTENT_SHARED)
		1009
		1010	const_iv (SPLICE_F_MOVE)
		1011	const_iv (SPLICE_F_NONBLOCK)
		1012	const_iv (SPLICE_F_MORE)
		1013	const_iv (SPLICE_F_GIFT)
		1014
		1015	const_iv (SEEK_DATA)
		1016	const_iv (SEEK_HOLE)
		1017
		1018	/* libeio constants */
		1019	const_eio (SEEK_SET)
		1020	const_eio (SEEK_CUR)
		1021	const_eio (SEEK_END)
		1022
		1023	const_eio (MCL_FUTURE)
		1024	const_eio (MCL_CURRENT)
		1025
		1026	const_eio (MS_ASYNC)
		1027	const_eio (MS_INVALIDATE)
		1028	const_eio (MS_SYNC)
		1029
		1030	const_eio (MT_MODIFY)
		1031
		1032	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1033	const_eio (SYNC_FILE_RANGE_WRITE)
		1034	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1035
		1036	const_eio (FALLOC_FL_KEEP_SIZE)
		1037	const_eio (FALLOC_FL_PUNCH_HOLE)
		1038
		1039	const_eio (READDIR_DENTS)
		1040	const_eio (READDIR_DIRS_FIRST)
		1041	const_eio (READDIR_STAT_ORDER)
		1042	const_eio (READDIR_FOUND_UNKNOWN)
		1043
		1044	const_eio (DT_UNKNOWN)
		1045	const_eio (DT_FIFO)
		1046	const_eio (DT_CHR)
		1047	const_eio (DT_DIR)
		1048	const_eio (DT_BLK)
		1049	const_eio (DT_REG)
		1050	const_eio (DT_LNK)
		1051	const_eio (DT_SOCK)
		1052	const_eio (DT_WHT)
		1053	};
		1054
		1055	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1056	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1057	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1058	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
		1059
		1060	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
		1061	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
		1062
		1063	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1064
		1065	reinit ();
		1066	}
		1067
784	void	1068	void
785	min_parallel(nthreads)	1069	reinit ()
786	int nthreads	1070	PROTOTYPE:
		1071
		1072	void
		1073	max_poll_reqs (unsigned int nreqs)
787	PROTOTYPE: $	1074	PROTOTYPE: $
		1075	CODE:
		1076	eio_set_max_poll_reqs (nreqs);
788		1077
789	void	1078	void
790	max_parallel(nthreads)	1079	max_poll_time (double nseconds)
791	int nthreads
792	PROTOTYPE: $	1080	PROTOTYPE: $
793
794	int
795	max_outstanding(nreqs)
796	int nreqs
797	PROTOTYPE: $
798	CODE:	1081	CODE:
799	RETVAL = max_outstanding;	1082	eio_set_max_poll_time (nseconds);
		1083
		1084	void
		1085	min_parallel (unsigned int nthreads)
		1086	PROTOTYPE: $
		1087	CODE:
		1088	eio_set_min_parallel (nthreads);
		1089
		1090	void
		1091	max_parallel (unsigned int nthreads)
		1092	PROTOTYPE: $
		1093	CODE:
		1094	eio_set_max_parallel (nthreads);
		1095
		1096	void
		1097	max_idle (unsigned int nthreads)
		1098	PROTOTYPE: $
		1099	CODE:
		1100	eio_set_max_idle (nthreads);
		1101
		1102	void
		1103	idle_timeout (unsigned int seconds)
		1104	PROTOTYPE: $
		1105	CODE:
		1106	eio_set_idle_timeout (seconds);
		1107
		1108	void
		1109	max_outstanding (unsigned int maxreqs)
		1110	PROTOTYPE: $
		1111	CODE:
800	max_outstanding = nreqs;	1112	max_outstanding = maxreqs;
801		1113
802	void	1114	void
803	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1115	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
804	SV * pathname
805	int flags
806	int mode
807	SV * callback
808	PROTOTYPE: $$$;$
809	CODE:	1116	PPCODE:
810	{	1117	{
811	dREQ;	1118	dREQ;
812		1119
		1120	req->type = EIO_WD_OPEN;
		1121	req_set_path1 (req, pathname);
		1122
		1123	REQ_SEND;
		1124	}
		1125
		1126	void
		1127	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1128	PPCODE:
		1129	{
		1130	dREQ;
		1131
813	req->type = REQ_OPEN;	1132	req->type = EIO_OPEN;
814	req->data = newSVsv (pathname);	1133	req_set_path1 (req, pathname);
815	req->dataptr = SvPVbyte_nolen (req->data);
816	req->fd = flags;	1134	req->int1 = flags;
817	req->mode = mode;	1135	req->int2 = mode;
818		1136
819	send_req (req);	1137	REQ_SEND;
820	}	1138	}
821		1139
822	void	1140	void
823	aio_close(fh,callback=&PL_sv_undef)	1141	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
824	SV * fh
825	SV * callback
826	PROTOTYPE: $;$
827	ALIAS:	1142	ALIAS:
828	aio_close = REQ_CLOSE
829	aio_fsync = REQ_FSYNC	1143	aio_fsync = EIO_FSYNC
830	aio_fdatasync = REQ_FDATASYNC	1144	aio_fdatasync = EIO_FDATASYNC
		1145	aio_syncfs = EIO_SYNCFS
831	CODE:	1146	PPCODE:
832	{	1147	{
		1148	int fd = s_fileno_croak (fh, 0);
833	dREQ;	1149	dREQ;
834		1150
835	req->type = ix;	1151	req->type = ix;
836	req->fh = newSVsv (fh);	1152	req->sv1 = newSVsv (fh);
837	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1153	req->int1 = fd;
838		1154
839	send_req (req);	1155	REQ_SEND;
840	}	1156	}
841		1157
842	void	1158	void
		1159	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1160	PPCODE:
		1161	{
		1162	int fd = s_fileno_croak (fh, 0);
		1163	dREQ;
		1164
		1165	req->type = EIO_SYNC_FILE_RANGE;
		1166	req->sv1 = newSVsv (fh);
		1167	req->int1 = fd;
		1168	req->offs = offset;
		1169	req->size = nbytes;
		1170	req->int2 = flags;
		1171
		1172	REQ_SEND;
		1173	}
		1174
		1175	void
		1176	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1177	PPCODE:
		1178	{
		1179	int fd = s_fileno_croak (fh, 0);
		1180	dREQ;
		1181
		1182	req->type = EIO_FALLOCATE;
		1183	req->sv1 = newSVsv (fh);
		1184	req->int1 = fd;
		1185	req->int2 = mode;
		1186	req->offs = offset;
		1187	req->size = len;
		1188
		1189	REQ_SEND;
		1190	}
		1191
		1192	void
		1193	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1194	PPCODE:
		1195	{
		1196	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1197	int fd = s_fileno_croak (fh, 0);
		1198	dREQ;
		1199
		1200	if (expect_false (close_fd < 0))
		1201	{
		1202	int pipefd [2];
		1203
		1204	if (
		1205	#ifdef _WIN32
		1206	_pipe (pipefd, 1, _O_BINARY) < 0
		1207	#else
		1208	pipe (pipefd) < 0
		1209	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1210	#endif
		1211	|| close (pipefd [1]) < 0
		1212	)
		1213	abort (); /*D*/
		1214
		1215	close_fd = pipefd [0];
		1216	}
		1217
		1218	req->type = EIO_DUP2;
		1219	req->int1 = close_fd;
		1220	req->sv2 = newSVsv (fh);
		1221	req->int2 = fd;
		1222
		1223	REQ_SEND;
		1224	}
		1225
		1226	void
		1227	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
		1228	PPCODE:
		1229	{
		1230	int fd = s_fileno_croak (fh, 0);
		1231	dREQ;
		1232
		1233	req->type = EIO_SEEK;
		1234	req->sv1 = newSVsv (fh);
		1235	req->int1 = fd;
		1236	req->offs = SvVAL64 (offset);
		1237	req->int2 = whence;
		1238
		1239	REQ_SEND;
		1240	}
		1241
		1242	void
843	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1243	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
844	SV * fh
845	UV offset
846	UV length
847	SV * data
848	UV dataoffset
849	SV * callback
850	ALIAS:	1244	ALIAS:
851	aio_read = REQ_READ	1245	aio_read = EIO_READ
852	aio_write = REQ_WRITE	1246	aio_write = EIO_WRITE
853	PROTOTYPE: $$$$$;$
854	CODE:	1247	PPCODE:
855	{	1248	{
856	aio_req req;
857	STRLEN svlen;	1249	STRLEN svlen;
		1250	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
858	char *svptr = SvPVbyte (data, svlen);	1251	char *svptr = SvPVbyte (data, svlen);
859		1252	UV len = SvUV (length);
860	SvUPGRADE (data, SVt_PV);
861	SvPOK_on (data);
862		1253
863	if (dataoffset < 0)	1254	if (dataoffset < 0)
864	dataoffset += svlen;	1255	dataoffset += svlen;
865		1256
866	if (dataoffset < 0 || dataoffset > svlen)	1257	if (dataoffset < 0 || dataoffset > svlen)
867	croak ("data offset outside of string");	1258	croak ("dataoffset outside of data scalar");
868		1259
869	if (ix == REQ_WRITE)	1260	if (ix == EIO_WRITE)
870	{	1261	{
871	/* write: check length and adjust. */	1262	/* write: check length and adjust. */
872	if (length < 0 || length + dataoffset > svlen)	1263	if (!SvOK (length) || len + dataoffset > svlen)
873	length = svlen - dataoffset;	1264	len = svlen - dataoffset;
874	}	1265	}
875	else	1266	else
876	{	1267	{
877	/* read: grow scalar as necessary */	1268	/* read: check type and grow scalar as necessary */
		1269	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
878	svptr = SvGROW (data, length + dataoffset);	1270	svptr = sv_grow (data, len + dataoffset + 1);
		1271	else if (SvCUR (data) < len + dataoffset)
		1272	croak ("length + dataoffset outside of scalar, and cannot grow");
879	}	1273	}
880
881	if (length < 0)
882	croak ("length must not be negative");
883		1274
884	{	1275	{
885	dREQ;	1276	dREQ;
886		1277
887	req->type = ix;	1278	req->type = ix;
888	req->fh = newSVsv (fh);	1279	req->sv1 = newSVsv (fh);
889	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1280	req->int1 = fd;
890	: IoOFP (sv_2io (fh)));	1281	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
891	req->offset = offset;	1282	req->size = len;
892	req->length = length;
893	req->data = SvREFCNT_inc (data);	1283	req->sv2 = SvREFCNT_inc (data);
894	req->dataptr = (char *)svptr + dataoffset;	1284	req->ptr2 = (char *)svptr + dataoffset;
		1285	req->stroffset = dataoffset;
895		1286
896	if (!SvREADONLY (data))	1287	if (!SvREADONLY (data))
897	{	1288	{
898	SvREADONLY_on (data);	1289	SvREADONLY_on (data);
899	req->data2ptr = (void *)data;	1290	req->flags |= FLAG_SV2_RO_OFF;
900	}	1291	}
901		1292
902	send_req (req);	1293	REQ_SEND;
903	}	1294	}
904	}	1295	}
905		1296
906	void	1297	void
907	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1298	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
908	SV * out_fh	1299	ALIAS:
909	SV * in_fh	1300	aio_readlink = EIO_READLINK
910	UV in_offset	1301	aio_realpath = EIO_REALPATH
911	UV length
912	SV * callback
913	PROTOTYPE: $$$$;$
914	CODE:	1302	PPCODE:
915	{	1303	{
		1304	dREQ;
		1305
		1306	req->type = ix;
		1307	req_set_path1 (req, pathname);
		1308
		1309	REQ_SEND;
		1310	}
		1311
		1312	void
		1313	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1314	PPCODE:
		1315	{
		1316	int ifd = s_fileno_croak (in_fh , 0);
		1317	int ofd = s_fileno_croak (out_fh, 1);
916	dREQ;	1318	dREQ;
917		1319
918	req->type = REQ_SENDFILE;	1320	req->type = EIO_SENDFILE;
919	req->fh = newSVsv (out_fh);	1321	req->sv1 = newSVsv (out_fh);
920	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1322	req->int1 = ofd;
921	req->fh2 = newSVsv (in_fh);	1323	req->sv2 = newSVsv (in_fh);
922	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1324	req->int2 = ifd;
923	req->offset = in_offset;	1325	req->offs = in_offset;
924	req->length = length;	1326	req->size = length;
925		1327
926	send_req (req);	1328	REQ_SEND;
927	}	1329	}
928		1330
929	void	1331	void
930	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1332	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
931	SV * fh
932	UV offset
933	IV length
934	SV * callback
935	PROTOTYPE: $$$;$
936	CODE:	1333	PPCODE:
937	{	1334	{
		1335	int fd = s_fileno_croak (fh, 0);
938	dREQ;	1336	dREQ;
939		1337
940	req->type = REQ_READAHEAD;	1338	req->type = EIO_READAHEAD;
941	req->fh = newSVsv (fh);	1339	req->sv1 = newSVsv (fh);
942	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1340	req->int1 = fd;
943	req->offset = offset;	1341	req->offs = offset;
944	req->length = length;	1342	req->size = length;
945		1343
946	send_req (req);	1344	REQ_SEND;
947	}	1345	}
948		1346
949	void	1347	void
950	aio_stat(fh_or_path,callback=&PL_sv_undef)	1348	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
951	SV * fh_or_path
952	SV * callback
953	ALIAS:	1349	ALIAS:
954	aio_stat = REQ_STAT	1350	aio_stat = EIO_STAT
955	aio_lstat = REQ_LSTAT	1351	aio_lstat = EIO_LSTAT
		1352	aio_statvfs = EIO_STATVFS
		1353	PPCODE:
		1354	{
		1355	dREQ;
		1356
		1357	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1358
		1359	REQ_SEND;
		1360	}
		1361
		1362	UV
		1363	major (UV dev)
		1364	ALIAS:
		1365	minor = 1
956	CODE:	1366	CODE:
		1367	RETVAL = ix ? major (dev) : minor (dev);
		1368	OUTPUT:
		1369	RETVAL
		1370
		1371	UV
		1372	makedev (UV maj, UV min)
		1373	CODE:
		1374	RETVAL = makedev (maj, min);
		1375	OUTPUT:
		1376	RETVAL
		1377
		1378	void
		1379	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1380	PPCODE:
957	{	1381	{
958	dREQ;	1382	dREQ;
959		1383
960	New (0, req->statdata, 1, Stat_t);	1384	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
961	if (!req->statdata)	1385	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
962	{	1386	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
963	free_req (req);
964	croak ("out of memory during aio_req->statdata allocation");
965	}
966		1387
967	if (SvPOK (fh_or_path))	1388	REQ_SEND;
968	{
969	req->type = ix;
970	req->data = newSVsv (fh_or_path);
971	req->dataptr = SvPVbyte_nolen (req->data);
972	}
973	else
974	{
975	req->type = REQ_FSTAT;
976	req->fh = newSVsv (fh_or_path);
977	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
978	}
979
980	send_req (req);
981	}	1389	}
982		1390
983	void	1391	void
		1392	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1393	PPCODE:
		1394	{
		1395	dREQ;
		1396
		1397	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1398	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1399
		1400	REQ_SEND;
		1401	}
		1402
		1403	void
		1404	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1405	PPCODE:
		1406	{
		1407	dREQ;
		1408
		1409	req->int2 = mode;
		1410	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1411
		1412	REQ_SEND;
		1413	}
		1414
		1415	void
		1416	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1417	PPCODE:
		1418	{
		1419	dREQ;
		1420
		1421	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1422	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1423	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1424
		1425	REQ_SEND;
		1426	}
		1427
		1428	void
		1429	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1430	PPCODE:
		1431	{
		1432	dREQ;
		1433
		1434	req->type = EIO_READDIR;
		1435	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1436
		1437	if (flags & EIO_READDIR_DENTS)
		1438	req->int1 |= EIO_READDIR_CUSTOM2;
		1439
		1440	req_set_path1 (req, pathname);
		1441
		1442	REQ_SEND;
		1443	}
		1444
		1445	void
		1446	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1447	PPCODE:
		1448	{
		1449	dREQ;
		1450
		1451	req->type = EIO_MKDIR;
		1452	req->int2 = mode;
		1453	req_set_path1 (req, pathname);
		1454
		1455	REQ_SEND;
		1456	}
		1457
		1458	void
984	aio_unlink(pathname,callback=&PL_sv_undef)	1459	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
985	SV * pathname
986	SV * callback
987	ALIAS:	1460	ALIAS:
988	aio_unlink = REQ_UNLINK	1461	aio_unlink = EIO_UNLINK
989	aio_rmdir = REQ_RMDIR	1462	aio_rmdir = EIO_RMDIR
		1463	aio_readdir = EIO_READDIR
990	CODE:	1464	PPCODE:
991	{	1465	{
992	dREQ;	1466	dREQ;
993		1467
994	req->type = ix;	1468	req->type = ix;
995	req->data = newSVsv (pathname);	1469	req_set_path1 (req, pathname);
996	req->dataptr = SvPVbyte_nolen (req->data);
997
998	send_req (req);
999	}
1000		1470
		1471	REQ_SEND;
		1472	}
		1473
1001	void	1474	void
1002	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1475	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1003	SV * oldpath	1476	ALIAS:
1004	SV * newpath	1477	aio_link = EIO_LINK
1005	SV * callback	1478	aio_symlink = EIO_SYMLINK
		1479	aio_rename = EIO_RENAME
1006	CODE:	1480	PPCODE:
1007	{	1481	{
		1482	eio_wd wd2 = 0;
1008	dREQ;	1483	dREQ;
1009		1484
1010	req->type = REQ_SYMLINK;	1485	req->type = ix;
1011	req->fh = newSVsv (oldpath);	1486	req_set_path1 (req, oldpath);
1012	req->data2ptr = SvPVbyte_nolen (req->fh);	1487	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1013	req->data = newSVsv (newpath);	1488	req->int3 = (long)wd2;
1014	req->dataptr = SvPVbyte_nolen (req->data);
1015		1489
1016	send_req (req);	1490	REQ_SEND;
1017	}	1491	}
1018		1492
1019	void	1493	void
1020	aio_readdir(pathname,callback=&PL_sv_undef)	1494	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1021	SV * pathname
1022	SV * callback
1023	CODE:	1495	PPCODE:
1024	{	1496	{
1025	dREQ;	1497	dREQ;
1026		1498
1027	req->type = REQ_READDIR;	1499	req->type = EIO_MKNOD;
1028	req->data = newSVsv (pathname);	1500	req->int2 = (mode_t)mode;
1029	req->dataptr = SvPVbyte_nolen (req->data);	1501	req->offs = dev;
		1502	req_set_path1 (req, pathname);
1030		1503
1031	send_req (req);	1504	REQ_SEND;
1032	}	1505	}
1033		1506
1034	void	1507	void
1035	flush()	1508	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1036	PROTOTYPE:	1509	ALIAS:
		1510	aio_mtouch = EIO_MTOUCH
		1511	aio_msync = EIO_MSYNC
		1512	PPCODE:
		1513	{
		1514	STRLEN svlen;
		1515	char *svptr = SvPVbyte (data, svlen);
		1516	UV len = SvUV (length);
		1517
		1518	if (offset < 0)
		1519	offset += svlen;
		1520
		1521	if (offset < 0 || offset > svlen)
		1522	croak ("offset outside of scalar");
		1523
		1524	if (!SvOK (length) || len + offset > svlen)
		1525	len = svlen - offset;
		1526
		1527	{
		1528	dREQ;
		1529
		1530	req->type = ix;
		1531	req->sv2 = SvREFCNT_inc (data);
		1532	req->ptr2 = (char *)svptr + offset;
		1533	req->size = len;
		1534	req->int1 = flags;
		1535
		1536	REQ_SEND;
		1537	}
		1538	}
		1539
		1540	void
		1541	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1542	PPCODE:
		1543	{
		1544	STRLEN svlen;
		1545	char *svptr = SvPVbyte (data, svlen);
		1546	UV len = SvUV (length);
		1547
		1548	if (offset < 0)
		1549	offset += svlen;
		1550
		1551	if (offset < 0 || offset > svlen)
		1552	croak ("offset outside of scalar");
		1553
		1554	if (!SvOK (length) || len + offset > svlen)
		1555	len = svlen - offset;
		1556
		1557	{
		1558	dREQ;
		1559
		1560	req->type = EIO_MLOCK;
		1561	req->sv2 = SvREFCNT_inc (data);
		1562	req->ptr2 = (char *)svptr + offset;
		1563	req->size = len;
		1564
		1565	REQ_SEND;
		1566	}
		1567	}
		1568
		1569	void
		1570	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1571	PPCODE:
		1572	{
		1573	dREQ;
		1574
		1575	req->type = EIO_MLOCKALL;
		1576	req->int1 = flags;
		1577
		1578	REQ_SEND;
		1579	}
		1580
		1581	void
		1582	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback=&PL_sv_undef)
		1583	PPCODE:
		1584	{
		1585	int fd = s_fileno_croak (fh, 0);
		1586	dREQ;
		1587
		1588	req->type = EIO_CUSTOM;
		1589	req->sv1 = newSVsv (fh);
		1590	req->int1 = fd;
		1591
		1592	req->feed = fiemap;
		1593	#if HAVE_FIEMAP
		1594	/* keep our fingers crossed that the next two types are 64 bit */
		1595	req->offs = start;
		1596	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1597	req->int2 = flags;
		1598	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1599	#endif
		1600
		1601	REQ_SEND;
		1602	}
		1603
		1604	void
		1605	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1606	PPCODE:
		1607	{
		1608	dREQ;
		1609
		1610	req->type = EIO_BUSY;
		1611	req->nv1 = delay < 0. ? 0. : delay;
		1612
		1613	REQ_SEND;
		1614	}
		1615
		1616	void
		1617	aio_group (SV *callback=&PL_sv_undef)
		1618	PPCODE:
		1619	{
		1620	dREQ;
		1621
		1622	req->type = EIO_GROUP;
		1623
		1624	PUTBACK;
		1625	req_submit (req);
		1626	SPAGAIN;
		1627
		1628	XPUSHs (req_sv (req, aio_grp_stash));
		1629	}
		1630
		1631	void
		1632	aio_nop (SV *callback=&PL_sv_undef)
		1633	ALIAS:
		1634	aio_nop = EIO_NOP
		1635	aio_sync = EIO_SYNC
		1636	PPCODE:
		1637	{
		1638	dREQ;
		1639
		1640	req->type = ix;
		1641
		1642	REQ_SEND;
		1643	}
		1644
		1645	int
		1646	aioreq_pri (int pri = 0)
1037	CODE:	1647	CODE:
		1648	RETVAL = next_pri;
		1649	if (items > 0)
		1650	{
		1651	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1652	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1653	next_pri = pri;
		1654	}
		1655	OUTPUT:
		1656	RETVAL
		1657
		1658	void
		1659	aioreq_nice (int nice = 0)
		1660	CODE:
		1661	nice = next_pri - nice;
		1662	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1663	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1664	next_pri = nice;
		1665
		1666	void
		1667	flush ()
		1668	CODE:
1038	while (nreqs)	1669	while (eio_nreqs ())
1039	{	1670	{
1040	poll_wait ();	1671	poll_wait ();
1041	poll_cb ();	1672	poll_cb ();
1042	}	1673	}
1043		1674
1044	void	1675	int
1045	poll()	1676	poll ()
1046	PROTOTYPE:
1047	CODE:	1677	CODE:
1048	if (nreqs)
1049	{
1050	poll_wait ();	1678	poll_wait ();
1051	poll_cb ();	1679	RETVAL = poll_cb ();
1052	}
1053
1054	int
1055	poll_fileno()
1056	PROTOTYPE:
1057	CODE:
1058	RETVAL = respipe [0];
1059	OUTPUT:	1680	OUTPUT:
1060	RETVAL	1681	RETVAL
1061		1682
1062	int	1683	int
		1684	poll_fileno ()
		1685	CODE:
		1686	RETVAL = s_epipe_fd (&respipe);
		1687	OUTPUT:
		1688	RETVAL
		1689
		1690	int
1063	poll_cb(...)	1691	poll_cb (...)
1064	PROTOTYPE:	1692	PROTOTYPE:
1065	CODE:	1693	CODE:
1066	RETVAL = poll_cb ();	1694	RETVAL = poll_cb ();
1067	OUTPUT:	1695	OUTPUT:
1068	RETVAL	1696	RETVAL
1069		1697
1070	void	1698	void
1071	poll_wait()	1699	poll_wait ()
1072	PROTOTYPE:
1073	CODE:	1700	CODE:
1074	if (nreqs)
1075	poll_wait ();	1701	poll_wait ();
1076		1702
1077	int	1703	int
1078	nreqs()	1704	nreqs ()
1079	PROTOTYPE:
1080	CODE:	1705	CODE:
1081	RETVAL = nreqs;	1706	RETVAL = eio_nreqs ();
1082	OUTPUT:	1707	OUTPUT:
1083	RETVAL	1708	RETVAL
1084		1709
		1710	int
		1711	nready ()
		1712	CODE:
		1713	RETVAL = eio_nready ();
		1714	OUTPUT:
		1715	RETVAL
		1716
		1717	int
		1718	npending ()
		1719	CODE:
		1720	RETVAL = eio_npending ();
		1721	OUTPUT:
		1722	RETVAL
		1723
		1724	int
		1725	nthreads ()
		1726	CODE:
		1727	RETVAL = eio_nthreads ();
		1728	OUTPUT:
		1729	RETVAL
		1730
		1731	int
		1732	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1733	CODE:
		1734	RETVAL = posix_fadvise (fh, offset, length, advice);
		1735	OUTPUT:
		1736	RETVAL
		1737
		1738	IV
		1739	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1740	CODE:
		1741	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1742	OUTPUT:
		1743	RETVAL
		1744
		1745	void
		1746	mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1747	PPCODE:
		1748	sv_unmagic (scalar, MMAP_MAGIC);
		1749	{
		1750	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1751	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1752	if (addr == (void *)-1)
		1753	XSRETURN_NO;
		1754
		1755	sv_force_normal (scalar);
		1756
		1757	/* we store the length in mg_obj, as namlen is I32 :/ */
		1758	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1759	->mg_obj = (SV *)length;
		1760
		1761	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1762
		1763	if (!(prot & PROT_WRITE))
		1764	SvREADONLY_on (scalar);
		1765
		1766	if (SvLEN (scalar))
		1767	Safefree (SvPVX (scalar));
		1768
		1769	SvPVX (scalar) = (char *)addr;
		1770	SvCUR_set (scalar, length);
		1771	SvLEN_set (scalar, 0);
		1772	SvPOK_only (scalar);
		1773
		1774	XSRETURN_YES;
		1775	}
		1776
		1777	void
		1778	munmap (SV *scalar)
		1779	CODE:
		1780	sv_unmagic (scalar, MMAP_MAGIC);
		1781
		1782	int
		1783	madvise (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1784	ALIAS:
		1785	mprotect = 1
		1786	CODE:
		1787	{
		1788	STRLEN svlen;
		1789	void *addr = SvPVbyte (scalar, svlen);
		1790	STRLEN len = SvUV (length);
		1791
		1792	if (offset < 0)
		1793	offset += svlen;
		1794
		1795	if (offset < 0 || offset > svlen)
		1796	croak ("offset outside of scalar");
		1797
		1798	if (!SvOK (length) || len + offset > svlen)
		1799	len = svlen - offset;
		1800
		1801	addr = (void *)(((intptr_t)addr) + offset);
		1802	eio_page_align (&addr, &len);
		1803
		1804	switch (ix)
		1805	{
		1806	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1807	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1808	}
		1809	}
		1810	OUTPUT:
		1811	RETVAL
		1812
		1813	int
		1814	munlock (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef)
		1815	CODE:
		1816	{
		1817	STRLEN svlen;
		1818	void *addr = SvPVbyte (scalar, svlen);
		1819	size_t len = SvUV (length);
		1820
		1821	if (offset < 0)
		1822	offset += svlen;
		1823
		1824	if (offset < 0 || offset > svlen)
		1825	croak ("offset outside of scalar");
		1826
		1827	if (!SvOK (length) || len + offset > svlen)
		1828	len = svlen - offset;
		1829
		1830	addr = (void *)(((intptr_t)addr) + offset);
		1831	eio_page_align (&addr, &len);
		1832	#if _POSIX_MEMLOCK_RANGE
		1833	RETVAL = munlock (addr, len);
		1834	#else
		1835	RETVAL = EIO_ENOSYS ();
		1836	#endif
		1837	}
		1838	OUTPUT:
		1839	RETVAL
		1840
		1841	int
		1842	munlockall ()
		1843	CODE:
		1844	#if _POSIX_MEMLOCK
		1845	munlockall ();
		1846	#else
		1847	RETVAL = EIO_ENOSYS ();
		1848	#endif
		1849	OUTPUT:
		1850	RETVAL
		1851
		1852	int
		1853	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1854	CODE:
		1855	{
		1856	#if HAVE_LINUX_SPLICE
		1857	loff_t off_in_, off_out_;
		1858	RETVAL = splice (
		1859	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1860	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1861	length, flags
		1862	);
		1863	#else
		1864	RETVAL = EIO_ENOSYS ();
		1865	#endif
		1866	}
		1867	OUTPUT:
		1868	RETVAL
		1869
		1870	int
		1871	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1872	CODE:
		1873	#if HAVE_LINUX_SPLICE
		1874	RETVAL = tee (rfh, wfh, length, flags);
		1875	#else
		1876	RETVAL = EIO_ENOSYS ();
		1877	#endif
		1878	OUTPUT:
		1879	RETVAL
		1880
		1881	int
		1882	pipesize (aio_rfd rfh, int new_size = -1)
		1883	PROTOTYPE: $;$
		1884	CODE:
		1885	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		1886	if (new_size >= 0)
		1887	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		1888	else
		1889	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		1890	#else
		1891	errno = ENOSYS;
		1892	RETVAL = -1;
		1893	#endif
		1894	OUTPUT:
		1895	RETVAL
		1896
		1897	void _on_next_submit (SV *cb)
		1898	CODE:
		1899	SvREFCNT_dec (on_next_submit);
		1900	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1901
		1902	PROTOTYPES: DISABLE
		1903
		1904	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1905
		1906	BOOT:
		1907	{
		1908	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1909	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1910	}
		1911
		1912	void
		1913	DESTROY (SV *self)
		1914	CODE:
		1915	{
		1916	aio_wd wd = SvAIO_WD (self);
		1917	#if HAVE_AT
		1918	{
		1919	SV *callback = &PL_sv_undef;
		1920	dREQ; /* clobbers next_pri :/ */
		1921	next_pri = req->pri; /* restore next_pri */
		1922	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1923	req->type = EIO_WD_CLOSE;
		1924	req->wd = wd;
		1925	REQ_SEND;
		1926	}
		1927	#else
		1928	eio_wd_close_sync (wd);
		1929	#endif
		1930	}
		1931
		1932	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1933
		1934	void
		1935	cancel (aio_req_ornot req)
		1936	CODE:
		1937	eio_cancel (req);
		1938
		1939	void
		1940	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1941	PPCODE:
		1942	{
		1943	if (GIMME_V != G_VOID)
		1944	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1945
		1946	if (items > 1)
		1947	{
		1948	SV *cb_cv =get_cb (callback);
		1949
		1950	SvREFCNT_dec (req->callback);
		1951	req->callback = SvREFCNT_inc (cb_cv);
		1952	}
		1953	}
		1954
		1955	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1956
		1957	void
		1958	add (aio_req grp, ...)
		1959	PPCODE:
		1960	{
		1961	int i;
		1962
		1963	if (grp->int1 == 2)
		1964	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1965
		1966	for (i = 1; i < items; ++i )
		1967	{
		1968	aio_req req;
		1969
		1970	if (GIMME_V != G_VOID)
		1971	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1972
		1973	req = SvAIO_REQ (ST (i));
		1974
		1975	if (req)
		1976	eio_grp_add (grp, req);
		1977	}
		1978	}
		1979
		1980	void
		1981	cancel_subs (aio_req_ornot req)
		1982	CODE:
		1983	req_cancel_subs (req);
		1984
		1985	void
		1986	result (aio_req grp, ...)
		1987	CODE:
		1988	{
		1989	int i;
		1990	AV *av;
		1991
		1992	grp->errorno = errno;
		1993
		1994	av = newAV ();
		1995	av_extend (av, items - 1);
		1996
		1997	for (i = 1; i < items; ++i )
		1998	av_push (av, newSVsv (ST (i)));
		1999
		2000	SvREFCNT_dec (grp->sv1);
		2001	grp->sv1 = (SV *)av;
		2002	}
		2003
		2004	void
		2005	errno (aio_req grp, int errorno = errno)
		2006	CODE:
		2007	grp->errorno = errorno;
		2008
		2009	void
		2010	limit (aio_req grp, int limit)
		2011	CODE:
		2012	eio_grp_limit (grp, limit);
		2013
		2014	void
		2015	feed (aio_req grp, SV *callback=&PL_sv_undef)
		2016	CODE:
		2017	{
		2018	SvREFCNT_dec (grp->sv2);
		2019	grp->sv2 = newSVsv (callback);
		2020	grp->feed = aio_grp_feed;
		2021
		2022	if (grp->int2 <= 0)
		2023	grp->int2 = 2;
		2024
		2025	eio_grp_limit (grp, grp->int2);
		2026	}
		2027

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