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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.39 by root, Mon Feb 6 23:54:12 2006 UTC vs.
Revision 1.245 by root, Fri Jun 23 03:23:19 2017 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. don't complain to me if this fails
		27	* for you.
		28	*/
		29	#if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
		30	# include <linux/fs.h>
		31	# ifdef FS_IOC_FIEMAP
		32	# include <linux/types.h>
		33	# include <linux/fiemap.h>
		34	# define HAVE_FIEMAP 1
		35	# endif
		36	#endif
		37
		38	/* perl namespace pollution */
		39	#undef VERSION
		40
		41	/* perl stupidly overrides readdir and maybe others */
		42	/* with thread-unsafe versions, imagine that :( */
		43	#undef readdir
		44	#undef opendir
		45	#undef closedir
		46
		47	#ifdef _WIN32
		48
		49	// perl overrides all those nice libc functions
		50
		51	#undef malloc
		52	#undef free
		53	#undef open
		54	#undef read
		55	#undef write
		56	#undef send
		57	#undef recv
		58	#undef stat
		59	#undef lstat
		60	#undef fstat
		61	#undef truncate
		62	#undef ftruncate
		63	#undef open
		64	#undef link
		65	#undef close
		66	#undef unlink
		67	#undef mkdir
		68	#undef rmdir
		69	#undef rename
		70	#undef lseek
		71	#undef opendir
		72	#undef readdir
		73	#undef closedir
		74	#undef chmod
		75	#undef fchmod
		76	#undef dup
		77	#undef dup2
		78	#undef abort
		79	#undef pipe
		80
		81	#define EIO_STRUCT_STAT struct _stati64
		82	#define EIO_STRUCT_STATI64
		83
		84	#else
		85
28	# include <sys/socket.h>	86	#include <sys/time.h>
29	# elif __solaris /* not yet */
30	# include <sys/sendfile.h>	87	#include <sys/select.h>
		88	#include <unistd.h>
		89	#include <utime.h>
		90	#include <signal.h>
		91
		92	#define EIO_STRUCT_STAT Stat_t
		93
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	SV *sv3, *sv4; \
		119	STRLEN stroffset; \
		120	SV *self;
		121
		122	#define EIO_NO_WRAPPERS 1
		123
		124	#include "libeio/config.h"
		125	#include "libeio/eio.h"
		126
		127	static int req_invoke (eio_req *req);
		128	#define EIO_FINISH(req) req_invoke (req)
		129	static void req_destroy (eio_req *grp);
		130	#define EIO_DESTROY(req) req_destroy (req)
		131
		132	#include "libeio/eio.c"
		133
		134	#if !HAVE_POSIX_FADVISE
		135	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		136	#endif
		137
		138	#if !HAVE_POSIX_MADVISE
		139	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		140	#endif
		141
		142	#ifndef MAP_ANONYMOUS
		143	# ifdef MAP_ANON
		144	# define MAP_ANONYMOUS MAP_ANON
31	# else	145	# else
32	# error sendfile support requested but not available	146	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
33	# endif	147	# endif
34	#endif	148	#endif
35		149
36	/* used for struct dirent, AIX doesn't provide it */	150	/* defines all sorts of constants to 0 unless they are already defined */
37	#ifndef NAME_MAX	151	/* also provides const_iv_ and const_niv_ macros for them */
38	# define NAME_MAX 4096	152	#include "def0.h"
39	#endif
40		153
41	#if __ia64	154	#ifndef makedev
42	# define STACKSIZE 65536	155	# define makedev(maj,min) (((maj) << 8) | (min))
43	#else
44	# define STACKSIZE 8192
45	#endif	156	#endif
		157	#ifndef major
		158	# define major(dev) ((dev) >> 8)
		159	#endif
		160	#ifndef minor
		161	# define minor(dev) ((dev) & 0xff)
		162	#endif
46		163
47	enum {	164	#if PAGESIZE <= 0
48	REQ_QUIT,	165	# define PAGESIZE sysconf (_SC_PAGESIZE)
49	REQ_OPEN, REQ_CLOSE,	166	#endif
50	REQ_READ, REQ_WRITE, REQ_READAHEAD,
51	REQ_SENDFILE,
52	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
53	REQ_FSYNC, REQ_FDATASYNC,
54	REQ_UNLINK, REQ_RMDIR,
55	REQ_READDIR,
56	REQ_SYMLINK,
57	};
58		167
59	typedef struct aio_cb {	168	/*****************************************************************************/
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		169
116	static void	170	static void
117	poll_wait ()	171	fiemap (eio_req *req)
118	{	172	{
119	if (nreqs && !ress)	173	req->result = -1;
120	{
121	fd_set rfd;
122	FD_ZERO(&rfd);
123	FD_SET(respipe [0], &rfd);
124		174
125	select (respipe [0] + 1, &rfd, 0, 0, 0);	175	#if HAVE_FIEMAP
126	}	176	/* assume some c99 */
127	}	177	struct fiemap *fiemap = 0;
		178	size_t end_offset;
		179	int count = req->int3;
128		180
129	static int	181	req->flags |= EIO_FLAG_PTR1_FREE;
130	poll_cb ()	182
131	{	183	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
132	dSP;	184	/* increase in 3.5kb steps */
		185	if (count < 0)
133	int count = 0;	186	count = 8;
134	int do_croak = 0;	187
135	aio_req req;	188	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		189	errno = ENOMEM;
		190	if (!fiemap)
		191	return;
		192
		193	req->ptr1 = fiemap;
		194
		195	fiemap->fm_start = req->offs;
		196	fiemap->fm_length = req->size;
		197	fiemap->fm_flags = req->int2;
		198	fiemap->fm_extent_count = count;
		199
		200	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
		201	return;
		202
		203	if (req->int3 >= 0 /* not autosizing */
		204	|| !fiemap->fm_mapped_extents /* no more extents */
		205	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
		206	goto done;
		207
		208	/* else we have to loop -
		209	* it would be tempting (actually I tried that first) to just query the
		210	* number of extents needed, but linux often feels like not returning all
		211	* extents, without telling us it left any out. this complicates
		212	* this quite a bit.
		213	*/
		214
		215	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
136		216
137	for (;;)	217	for (;;)
138	{	218	{
139	pthread_mutex_lock (&reslock);	219	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
140	req = ress;	220	char scratch[3072];
		221	struct fiemap *incmap = (struct fiemap *)scratch;
141		222
		223	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
		224	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
		225	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
		226	incmap->fm_flags = fiemap->fm_flags;
		227	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
		228
		229	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
		230	return;
		231
		232	if (!incmap->fm_mapped_extents)
		233	goto done;
		234
		235	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
		236	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		237	errno = ENOMEM;
142	if (req)	238	if (!fiemap)
		239	return;
		240
		241	req->ptr1 = fiemap;
		242
		243	for (count = 0; count < incmap->fm_mapped_extents; ++count)
143	{	244	{
144	ress = req->next;	245	struct fiemap_extent *e = incmap->fm_extents + count;
145		246
146	if (!ress)	247	if (e->fe_logical + e->fe_length >= end_offset)
147	{	248	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		249
153	rese = 0;	250	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
154	}
155	}
156		251
157	pthread_mutex_unlock (&reslock);	252	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		253	goto done;
158		254
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	}	255	}
551	}	256	}
552		257
553	return res;	258	done:
554	}	259	req->result = 0;
555		260
556	/* read a full directory */	261	#else
		262	errno = ENOSYS;
		263	#endif
		264	}
		265
		266	/*****************************************************************************/
		267
		268	enum {
		269	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		270	};
		271
		272	typedef eio_req *aio_req;
		273	typedef eio_req *aio_req_ornot;
		274	typedef eio_wd aio_wd;
		275
		276	static SV *on_next_submit;
		277	static int next_pri = EIO_PRI_DEFAULT;
		278	static int max_outstanding;
		279
		280	static s_epipe respipe;
		281
		282	static void req_destroy (aio_req req);
		283	static void req_cancel (aio_req req);
		284
		285	static void
		286	want_poll (void)
		287	{
		288	/* write a dummy byte to the pipe so fh becomes ready */
		289	s_epipe_signal (&respipe);
		290	}
		291
		292	static void
		293	done_poll (void)
		294	{
		295	/* read any signals sent by the worker threads */
		296	s_epipe_drain (&respipe);
		297	}
		298
		299	/* must be called at most once */
		300	static SV *
		301	req_sv (aio_req req, HV *stash)
		302	{
		303	if (!req->self)
		304	{
		305	req->self = (SV *)newHV ();
		306	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		307	}
		308
		309	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		310	}
		311
		312	static SV *
		313	newSVaio_wd (aio_wd wd)
		314	{
		315	return sv_bless (newRV_noinc (newSViv ((intptr_t)wd)), aio_wd_stash);
		316	}
		317
		318	static aio_req
		319	SvAIO_REQ (SV *sv)
		320	{
		321	MAGIC *mg;
		322
		323	if (!SvROK (sv)
		324	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		325	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		326	&& SvSTASH (SvRV (sv)) != aio_req_stash
		327	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		328	croak ("object of class IO::AIO::REQ expected");
		329
		330	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		331
		332	return mg ? (aio_req)mg->mg_ptr : 0;
		333	}
		334
		335	static aio_wd
		336	SvAIO_WD (SV *sv)
		337	{
		338	if (!SvROK (sv)
		339	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		340	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		341	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		342
		343	return (aio_wd)(long)SvIVX (SvRV (sv));
		344	}
		345
		346	static SV *
		347	newmortalFH (int fd, int flags)
		348	{
		349	if (fd < 0)
		350	return &PL_sv_undef;
		351
		352	GV *gv = (GV *)sv_newmortal ();
		353	char sym[64];
		354	int symlen;
		355
		356	symlen = snprintf (sym, sizeof (sym), "fd#%d", fd);
		357	gv_init (gv, aio_stash, sym, symlen, 0);
		358
		359	symlen = snprintf (
		360	sym,
		361	sizeof (sym),
		362	"%s&=%d",
		363	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		364	fd
		365	);
		366
		367	return do_open (gv, sym, symlen, 0, 0, 0, 0)
		368	? (SV *)gv : &PL_sv_undef;
		369	}
		370
		371	static void
		372	aio_grp_feed (aio_req grp)
		373	{
		374	if (grp->sv2 && SvOK (grp->sv2))
		375	{
		376	dSP;
		377
		378	ENTER;
		379	SAVETMPS;
		380	PUSHMARK (SP);
		381	XPUSHs (req_sv (grp, aio_grp_stash));
		382	PUTBACK;
		383	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		384	SPAGAIN;
		385	FREETMPS;
		386	LEAVE;
		387	}
		388	}
		389
		390	static void
		391	req_submit (eio_req *req)
		392	{
		393	eio_submit (req);
		394
		395	if (expect_false (on_next_submit))
		396	{
		397	dSP;
		398	SV *cb = sv_2mortal (on_next_submit);
		399
		400	on_next_submit = 0;
		401
		402	PUSHMARK (SP);
		403	PUTBACK;
		404	call_sv (cb, G_DISCARD | G_EVAL);
		405	}
		406	}
		407
557	static int	408	static int
558	scandir_ (const char *path, void **namesp)	409	req_invoke (eio_req *req)
559	{	410	{
560	DIR *dirp = opendir (path);	411	if (req->flags & FLAG_SV2_RO_OFF)
561	union	412	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		413
573	if (!dirp)	414	if (!EIO_CANCELLED (req) && req->callback)
574	return -1;
575
576	names = malloc (memlen);
577
578	for (;;)
579	{	415	{
580	errno = 0, readdir_r (dirp, &u.d, &entp);	416	dSP;
		417	static SV *sv_result_cache; /* caches the result integer SV */
		418	SV *sv_result;
581		419
582	if (!entp)	420	ENTER;
583	break;	421	SAVETMPS;
		422	PUSHMARK (SP);
		423	EXTEND (SP, 1);
584		424
585	name = entp->d_name;	425	/* do not recreate the result IV from scratch each time */
586		426	if (expect_true (sv_result_cache))
587	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
588	{	427	{
589	int len = strlen (name) + 1;	428	sv_result = sv_result_cache; sv_result_cache = 0;
590		429	SvIV_set (sv_result, req->result);
591	res++;	430	SvIOK_only (sv_result);
592
593	while (memofs + len > memlen)
594	{
595	memlen *= 2;
596	names = realloc (names, memlen);
597	if (!names)
598	break;
599	}
600
601	memcpy (names + memofs, name, len);
602	memofs += len;
603	}
604	}
605
606	errorno = errno;
607	closedir (dirp);
608
609	if (errorno)
610	{
611	free (names);
612	errno = errorno;
613	res = -1;
614	}
615
616	*namesp = (void *)names;
617	return res;
618	}
619
620	/*****************************************************************************/
621
622	static void *
623	aio_proc (void *thr_arg)
624	{
625	aio_req req;
626	int type;
627
628	do
629	{
630	pthread_mutex_lock (&reqlock);
631
632	for (;;)
633	{
634	req = reqs;
635
636	if (reqs)
637	{
638	reqs = reqs->next;
639	if (!reqs) reqe = 0;
640	}
641
642	if (req)
643	break;
644
645	pthread_cond_wait (&reqwait, &reqlock);
646	}
647
648	pthread_mutex_unlock (&reqlock);
649
650	errno = 0; /* strictly unnecessary */
651
652	type = req->type;
653
654	switch (type)
655	{
656	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
657	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
658
659	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
660	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
661
662	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
663	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
664	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
665
666	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
667	case REQ_CLOSE: req->result = close (req->fd); break;
668	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
669	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
670	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
671
672	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
673	case REQ_FSYNC: req->result = fsync (req->fd); break;
674	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
675
676	case REQ_QUIT:
677	break;
678
679	default:
680	req->result = ENOSYS;
681	break;
682	}
683
684	req->errorno = errno;
685
686	pthread_mutex_lock (&reslock);
687
688	req->next = 0;
689
690	if (rese)
691	{
692	rese->next = req;
693	rese = req;
694	}	431	}
695	else	432	else
696	{	433	{
697	rese = ress = req;	434	sv_result = newSViv (req->result);
698		435	SvREADONLY_on (sv_result);
699	/* write a dummy byte to the pipe so fh becomes ready */
700	write (respipe [1], &respipe, 1);
701	}	436	}
702		437
703	pthread_mutex_unlock (&reslock);	438	switch (req->type)
		439	{
		440	case EIO_WD_OPEN:
		441	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		442	break;
		443
		444	case EIO_READDIR:
		445	{
		446	SV *rv = &PL_sv_undef;
		447
		448	if (req->result >= 0)
		449	{
		450	int i;
		451	char *names = (char *)req->ptr2;
		452	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		453	AV *av = newAV ();
		454
		455	av_extend (av, req->result - 1);
		456
		457	for (i = 0; i < req->result; ++i)
		458	{
		459	if (req->int1 & EIO_READDIR_DENTS)
		460	{
		461	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		462
		463	if (req->int1 & EIO_READDIR_CUSTOM2)
		464	{
		465	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		466	AV *avent = newAV ();
		467
		468	av_extend (avent, 2);
		469
		470	if (!sv_type [ent->type])
		471	{
		472	sv_type [ent->type] = newSViv (ent->type);
		473	SvREADONLY_on (sv_type [ent->type]);
		474	}
		475
		476	av_store (avent, 0, namesv);
		477	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		478	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		479
		480	av_store (av, i, newRV_noinc ((SV *)avent));
		481	}
		482	else
		483	av_store (av, i, namesv);
		484
		485	++ent;
		486	}
		487	else
		488	{
		489	SV *name = newSVpv (names, 0);
		490	av_store (av, i, name);
		491	names += SvCUR (name) + 1;
		492	}
		493	}
		494
		495	rv = sv_2mortal (newRV_noinc ((SV *)av));
		496	}
		497
		498	PUSHs (rv);
		499
		500	if (req->int1 & EIO_READDIR_CUSTOM1)
		501	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		502	}
		503	break;
		504
		505	case EIO_OPEN:
		506	PUSHs (newmortalFH (req->result, req->int1 & (O_RDONLY | O_WRONLY | O_RDWR)));
		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;
704	}	661	}
705	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 (EIO_POOL->reslock);
		711	size = EIO_POOL->res_queue.size;
		712	X_UNLOCK (EIO_POOL->reslock);
		713
		714	if (size)
		715	return;
		716
		717	etp_maybe_start_thread (EIO_POOL);
		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	#endif
		759
		760	#define MMAP_MAGIC PERL_MAGIC_ext
		761
		762	static int ecb_cold
		763	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		764	{
		765	int old_errno = errno;
		766	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		767	errno = old_errno;
		768
		769	mg->mg_obj = 0; /* just in case */
		770
		771	SvREADONLY_off (sv);
		772
		773	if (SvPVX (sv) != mg->mg_ptr)
		774	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		775
		776	SvCUR_set (sv, 0);
		777	SvPVX (sv) = 0;
		778	SvOK_off (sv);
706		779
707	return 0;	780	return 0;
708	}	781	}
709		782
		783	static MGVTBL mmap_vtbl = {
		784	0, 0, 0, 0, mmap_free
		785	};
		786
710	/*****************************************************************************/	787	/*****************************************************************************/
711		788
712	static void atfork_prepare (void)	789	static SV *
		790	get_cb (SV *cb_sv)
713	{	791	{
714	pthread_mutex_lock (&reqlock);	792	SvGETMAGIC (cb_sv);
715	pthread_mutex_lock (&reslock);	793	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
716	#if !HAVE_PREADWRITE
717	pthread_mutex_lock (&preadwritelock);
718	#endif
719	#if !HAVE_READDIR_R
720	pthread_mutex_lock (&readdirlock);
721	#endif
722	}	794	}
723		795
724	static void atfork_parent (void)	796	static aio_req ecb_noinline
		797	dreq (SV *callback)
725	{	798	{
726	#if !HAVE_READDIR_R	799	SV *cb_cv;
727	pthread_mutex_unlock (&readdirlock);
728	#endif
729	#if !HAVE_PREADWRITE
730	pthread_mutex_unlock (&preadwritelock);
731	#endif
732	pthread_mutex_unlock (&reslock);
733	pthread_mutex_unlock (&reqlock);
734	}
735
736	static void atfork_child (void)
737	{
738	aio_req prv;	800	aio_req req;
		801	int req_pri = next_pri;
		802	next_pri = EIO_PRI_DEFAULT;
739		803
740	started = 0;	804	cb_cv = get_cb (callback);
741		805
742	while (reqs)	806	req = calloc (sizeof (*req), 1);
		807	if (!req)
		808	croak ("out of memory during eio_req allocation");
		809
		810	req->callback = SvREFCNT_inc (cb_cv);
		811	req->pri = req_pri;
		812
		813	return req;
		814	}
		815
		816	#define dREQ \
		817	aio_req req = dreq (callback); \
		818
		819	#define REQ_SEND \
		820	PUTBACK; \
		821	req_submit (req); \
		822	SPAGAIN; \
		823	\
		824	if (GIMME_V != G_VOID) \
		825	XPUSHs (req_sv (req, aio_req_stash));
		826
		827	ecb_inline void
		828	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		829	{
		830	if (expect_false (SvROK (path)))
743	{	831	{
744	prv = reqs;	832	SV *rv = SvRV (path);
745	reqs = prv->next;	833	SV *wdob;
746	free_req (prv);	834
		835	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
		836	{
		837	path = AvARRAY (rv)[1];
		838	wdob = AvARRAY (rv)[0];
		839
		840	if (SvOK (wdob))
		841	{
		842	*wd = SvAIO_WD (wdob);
		843	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		844	}
		845	else
		846	*wd = EIO_INVALID_WD;
		847	}
		848	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		849	{
		850	*wd = (aio_wd)(long)SvIVX (rv);
		851	*wdsv = SvREFCNT_inc_NN (rv);
		852	*ptr = ".";
		853	return; /* path set to "." */
		854	}
		855	else
		856	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
747	}	857	}
748		858
749	reqs = reqe = 0;	859	*pathsv = newSVsv (path);
750		860	*ptr = SvPVbyte_nolen (*pathsv);
751	while (ress)	861	}
		862
		863	static void ecb_noinline
		864	req_set_path1 (aio_req req, SV *path)
		865	{
		866	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		867	}
		868
		869	static void ecb_noinline
		870	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		871	{
		872	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		873
		874	switch (SvTYPE (rv))
752	{	875	{
753	prv = ress;	876	case SVt_PVIO:
754	ress = prv->next;	877	case SVt_PVLV:
755	free_req (prv);	878	case SVt_PVGV:
		879	req->type = type_fh;
		880	req->sv1 = newSVsv (fh_or_path);
		881	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		882	break;
		883
		884	default:
		885	req->type = type_path;
		886	req_set_path1 (req, fh_or_path);
		887	break;
756	}	888	}
757
758	ress = rese = 0;
759
760	close (respipe [0]);
761	close (respipe [1]);
762	create_pipe ();
763
764	atfork_parent ();
765	}	889	}
766		890
767	#define dREQ \	891	XS(boot_IO__AIO) ecb_cold;
768	aio_req req; \	892
769	\
770	if (SvOK (callback) && !SvROK (callback)) \
771	croak ("clalback must be undef or of reference type"); \
772	\
773	Newz (0, req, 1, aio_cb); \
774	if (!req) \
775	croak ("out of memory during aio_req allocation"); \
776	\
777	req->callback = newSVsv (callback);
778
779	MODULE = IO::AIO PACKAGE = IO::AIO	893	MODULE = IO::AIO PACKAGE = IO::AIO
780		894
781	PROTOTYPES: ENABLE	895	PROTOTYPES: ENABLE
782		896
783	BOOT:	897	BOOT:
784	{	898	{
785	create_pipe ();	899	static const struct {
786	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	900	const char *name;
787	}	901	IV iv;
		902	} *civ, const_iv[] = {
		903	# define const_niv(name, value) { # name, (IV) value },
		904	# define const_iv(name) { # name, (IV) name },
		905	# define const_eio(name) { # name, (IV) EIO_ ## name },
788		906
		907	/* you have to re-run ./gendef0 after adding/removing any constants here */
		908	/* the first block can be undef if missing */
		909	const_iv (ENOSYS)
		910	const_iv (EXDEV)
		911	const_iv (EBADR)
		912
		913	/* for lseek */
		914	const_iv (SEEK_DATA)
		915	const_iv (SEEK_HOLE)
		916
		917	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		918	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		919	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		920	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		921	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		922	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		923
		924	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		925	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		926	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		927	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		928	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		929	const_niv (MADV_FREE , POSIX_MADV_FREE)
		930
		931	/* the second block will be 0 when missing */
		932	const_iv (O_RDONLY)
		933	const_iv (O_WRONLY)
		934	const_iv (O_RDWR)
		935	const_iv (O_CREAT)
		936	const_iv (O_TRUNC)
		937	const_iv (O_EXCL)
		938	const_iv (O_APPEND)
		939
		940	const_iv (O_ASYNC)
		941	const_iv (O_DIRECT)
		942	const_iv (O_NOATIME)
		943
		944	const_iv (O_CLOEXEC)
		945	const_iv (O_NOCTTY)
		946	const_iv (O_NOFOLLOW)
		947	const_iv (O_NONBLOCK)
		948	const_iv (O_EXEC)
		949	const_iv (O_SEARCH)
		950	const_iv (O_DIRECTORY)
		951	const_iv (O_DSYNC)
		952	const_iv (O_RSYNC)
		953	const_iv (O_SYNC)
		954	const_iv (O_PATH)
		955	const_iv (O_TMPFILE)
		956	const_iv (O_TTY_INIT)
		957
		958	const_iv (S_IFIFO)
		959	const_iv (S_IFCHR)
		960	const_iv (S_IFBLK)
		961	const_iv (S_IFLNK)
		962	const_iv (S_IFREG)
		963	const_iv (S_IFDIR)
		964	const_iv (S_IFWHT)
		965	const_iv (S_IFSOCK)
		966	const_iv (S_IFMT)
		967
		968	const_iv (ST_RDONLY)
		969	const_iv (ST_NOSUID)
		970	const_iv (ST_NODEV)
		971	const_iv (ST_NOEXEC)
		972	const_iv (ST_SYNCHRONOUS)
		973	const_iv (ST_MANDLOCK)
		974	const_iv (ST_WRITE)
		975	const_iv (ST_APPEND)
		976	const_iv (ST_IMMUTABLE)
		977	const_iv (ST_NOATIME)
		978	const_iv (ST_NODIRATIME)
		979	const_iv (ST_RELATIME)
		980
		981	const_iv (PROT_NONE)
		982	const_iv (PROT_EXEC)
		983	const_iv (PROT_READ)
		984	const_iv (PROT_WRITE)
		985
		986	const_iv (MAP_PRIVATE)
		987	const_iv (MAP_SHARED)
		988	const_iv (MAP_FIXED)
		989	const_iv (MAP_ANONYMOUS)
		990
		991	/* linuxish */
		992	const_iv (MAP_LOCKED)
		993	const_iv (MAP_NORESERVE)
		994	const_iv (MAP_POPULATE)
		995	const_iv (MAP_NONBLOCK)
		996	const_iv (MAP_GROWSDOWN)
		997	const_iv (MAP_32BIT)
		998	const_iv (MAP_HUGETLB)
		999	const_iv (MAP_STACK)
		1000
		1001	const_iv (FIFREEZE)
		1002	const_iv (FITHAW)
		1003	const_iv (FITRIM)
		1004	const_iv (FICLONE)
		1005	const_iv (FICLONERANGE)
		1006	const_iv (FIDEDUPERANGE)
		1007
		1008	const_iv (FS_IOC_GETFLAGS)
		1009	const_iv (FS_IOC_SETFLAGS)
		1010	const_iv (FS_IOC_GETVERSION)
		1011	const_iv (FS_IOC_SETVERSION)
		1012	const_iv (FS_IOC_FIEMAP)
		1013	const_iv (FS_IOC_FSGETXATTR)
		1014	const_iv (FS_IOC_FSSETXATTR)
		1015	const_iv (FS_IOC_SET_ENCRYPTION_POLICY)
		1016	const_iv (FS_IOC_GET_ENCRYPTION_PWSALT)
		1017	const_iv (FS_IOC_GET_ENCRYPTION_POLICY)
		1018
		1019	const_iv (FS_KEY_DESCRIPTOR_SIZE)
		1020
		1021	const_iv (FS_SECRM_FL)
		1022	const_iv (FS_UNRM_FL)
		1023	const_iv (FS_COMPR_FL)
		1024	const_iv (FS_SYNC_FL)
		1025	const_iv (FS_IMMUTABLE_FL)
		1026	const_iv (FS_APPEND_FL)
		1027	const_iv (FS_NODUMP_FL)
		1028	const_iv (FS_NOATIME_FL)
		1029	const_iv (FS_DIRTY_FL)
		1030	const_iv (FS_COMPRBLK_FL)
		1031	const_iv (FS_NOCOMP_FL)
		1032	const_iv (FS_ENCRYPT_FL)
		1033	const_iv (FS_BTREE_FL)
		1034	const_iv (FS_INDEX_FL)
		1035	const_iv (FS_JOURNAL_DATA_FL)
		1036	const_iv (FS_NOTAIL_FL)
		1037	const_iv (FS_DIRSYNC_FL)
		1038	const_iv (FS_TOPDIR_FL)
		1039	const_iv (FS_FL_USER_MODIFIABLE)
		1040
		1041	const_iv (FS_XFLAG_REALTIME)
		1042	const_iv (FS_XFLAG_PREALLOC)
		1043	const_iv (FS_XFLAG_IMMUTABLE)
		1044	const_iv (FS_XFLAG_APPEND)
		1045	const_iv (FS_XFLAG_SYNC)
		1046	const_iv (FS_XFLAG_NOATIME)
		1047	const_iv (FS_XFLAG_NODUMP)
		1048	const_iv (FS_XFLAG_RTINHERIT)
		1049	const_iv (FS_XFLAG_PROJINHERIT)
		1050	const_iv (FS_XFLAG_NOSYMLINKS)
		1051	const_iv (FS_XFLAG_EXTSIZE)
		1052	const_iv (FS_XFLAG_EXTSZINHERIT)
		1053	const_iv (FS_XFLAG_NODEFRAG)
		1054	const_iv (FS_XFLAG_FILESTREAM)
		1055	const_iv (FS_XFLAG_DAX)
		1056	const_iv (FS_XFLAG_HASATTR)
		1057
		1058	const_iv (FIEMAP_FLAG_SYNC)
		1059	const_iv (FIEMAP_FLAG_XATTR)
		1060	const_iv (FIEMAP_FLAGS_COMPAT)
		1061	const_iv (FIEMAP_EXTENT_LAST)
		1062	const_iv (FIEMAP_EXTENT_UNKNOWN)
		1063	const_iv (FIEMAP_EXTENT_DELALLOC)
		1064	const_iv (FIEMAP_EXTENT_ENCODED)
		1065	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		1066	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1067	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1068	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1069	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1070	const_iv (FIEMAP_EXTENT_MERGED)
		1071	const_iv (FIEMAP_EXTENT_SHARED)
		1072
		1073	const_iv (SPLICE_F_MOVE)
		1074	const_iv (SPLICE_F_NONBLOCK)
		1075	const_iv (SPLICE_F_MORE)
		1076	const_iv (SPLICE_F_GIFT)
		1077
		1078	/* these are libeio constants, and are independent of gendef0 */
		1079	const_eio (SEEK_SET)
		1080	const_eio (SEEK_CUR)
		1081	const_eio (SEEK_END)
		1082
		1083	const_eio (MCL_FUTURE)
		1084	const_eio (MCL_CURRENT)
		1085
		1086	const_eio (MS_ASYNC)
		1087	const_eio (MS_INVALIDATE)
		1088	const_eio (MS_SYNC)
		1089
		1090	const_eio (MT_MODIFY)
		1091
		1092	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1093	const_eio (SYNC_FILE_RANGE_WRITE)
		1094	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1095
		1096	const_eio (FALLOC_FL_KEEP_SIZE)
		1097	const_eio (FALLOC_FL_PUNCH_HOLE)
		1098	const_eio (FALLOC_FL_COLLAPSE_RANGE)
		1099	const_eio (FALLOC_FL_ZERO_RANGE)
		1100
		1101	const_eio (RENAME_NOREPLACE)
		1102	const_eio (RENAME_EXCHANGE)
		1103	const_eio (RENAME_WHITEOUT)
		1104
		1105	const_eio (READDIR_DENTS)
		1106	const_eio (READDIR_DIRS_FIRST)
		1107	const_eio (READDIR_STAT_ORDER)
		1108	const_eio (READDIR_FOUND_UNKNOWN)
		1109
		1110	const_eio (DT_UNKNOWN)
		1111	const_eio (DT_FIFO)
		1112	const_eio (DT_CHR)
		1113	const_eio (DT_DIR)
		1114	const_eio (DT_BLK)
		1115	const_eio (DT_REG)
		1116	const_eio (DT_LNK)
		1117	const_eio (DT_SOCK)
		1118	const_eio (DT_WHT)
		1119	};
		1120
		1121	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1122	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1123	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1124	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
		1125
		1126	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
		1127	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
		1128
		1129	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1130
		1131	reinit ();
		1132	}
		1133
789	void	1134	void
790	min_parallel(nthreads)	1135	reinit ()
791	int nthreads	1136	PROTOTYPE:
		1137
		1138	void
		1139	max_poll_reqs (unsigned int nreqs)
792	PROTOTYPE: $	1140	PROTOTYPE: $
		1141	CODE:
		1142	eio_set_max_poll_reqs (nreqs);
793		1143
794	void	1144	void
795	max_parallel(nthreads)	1145	max_poll_time (double nseconds)
796	int nthreads
797	PROTOTYPE: $	1146	PROTOTYPE: $
798
799	int
800	max_outstanding(nreqs)
801	int nreqs
802	PROTOTYPE: $
803	CODE:	1147	CODE:
804	RETVAL = max_outstanding;	1148	eio_set_max_poll_time (nseconds);
		1149
		1150	void
		1151	min_parallel (unsigned int nthreads)
		1152	PROTOTYPE: $
		1153	CODE:
		1154	eio_set_min_parallel (nthreads);
		1155
		1156	void
		1157	max_parallel (unsigned int nthreads)
		1158	PROTOTYPE: $
		1159	CODE:
		1160	eio_set_max_parallel (nthreads);
		1161
		1162	void
		1163	max_idle (unsigned int nthreads)
		1164	PROTOTYPE: $
		1165	CODE:
		1166	eio_set_max_idle (nthreads);
		1167
		1168	void
		1169	idle_timeout (unsigned int seconds)
		1170	PROTOTYPE: $
		1171	CODE:
		1172	eio_set_idle_timeout (seconds);
		1173
		1174	void
		1175	max_outstanding (unsigned int maxreqs)
		1176	PROTOTYPE: $
		1177	CODE:
805	max_outstanding = nreqs;	1178	max_outstanding = maxreqs;
806		1179
807	void	1180	void
808	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1181	aio_wd (SV8 *pathname, SV *callback = &PL_sv_undef)
809	SV * pathname
810	int flags
811	int mode
812	SV * callback
813	PROTOTYPE: $$$;$
814	CODE:	1182	PPCODE:
815	{	1183	{
816	dREQ;	1184	dREQ;
817		1185
		1186	req->type = EIO_WD_OPEN;
		1187	req_set_path1 (req, pathname);
		1188
		1189	REQ_SEND;
		1190	}
		1191
		1192	void
		1193	aio_open (SV8 *pathname, int flags, int mode, SV *callback = &PL_sv_undef)
		1194	PPCODE:
		1195	{
		1196	dREQ;
		1197
818	req->type = REQ_OPEN;	1198	req->type = EIO_OPEN;
819	req->data = newSVsv (pathname);	1199	req_set_path1 (req, pathname);
820	req->dataptr = SvPVbyte_nolen (req->data);
821	req->fd = flags;	1200	req->int1 = flags;
822	req->mode = mode;	1201	req->int2 = mode;
823		1202
824	send_req (req);	1203	REQ_SEND;
825	}	1204	}
826		1205
827	void	1206	void
828	aio_close(fh,callback=&PL_sv_undef)	1207	aio_fsync (SV *fh, SV *callback = &PL_sv_undef)
829	SV * fh
830	SV * callback
831	PROTOTYPE: $;$
832	ALIAS:	1208	ALIAS:
833	aio_close = REQ_CLOSE
834	aio_fsync = REQ_FSYNC	1209	aio_fsync = EIO_FSYNC
835	aio_fdatasync = REQ_FDATASYNC	1210	aio_fdatasync = EIO_FDATASYNC
		1211	aio_syncfs = EIO_SYNCFS
836	CODE:	1212	PPCODE:
837	{	1213	{
		1214	int fd = s_fileno_croak (fh, 0);
838	dREQ;	1215	dREQ;
839		1216
840	req->type = ix;	1217	req->type = ix;
841	req->fh = newSVsv (fh);	1218	req->sv1 = newSVsv (fh);
842	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1219	req->int1 = fd;
843		1220
844	send_req (req);	1221	REQ_SEND;
845	}	1222	}
846		1223
847	void	1224	void
		1225	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback = &PL_sv_undef)
		1226	PPCODE:
		1227	{
		1228	int fd = s_fileno_croak (fh, 0);
		1229	dREQ;
		1230
		1231	req->type = EIO_SYNC_FILE_RANGE;
		1232	req->sv1 = newSVsv (fh);
		1233	req->int1 = fd;
		1234	req->offs = offset;
		1235	req->size = nbytes;
		1236	req->int2 = flags;
		1237
		1238	REQ_SEND;
		1239	}
		1240
		1241	void
		1242	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback = &PL_sv_undef)
		1243	PPCODE:
		1244	{
		1245	int fd = s_fileno_croak (fh, 0);
		1246	dREQ;
		1247
		1248	req->type = EIO_FALLOCATE;
		1249	req->sv1 = newSVsv (fh);
		1250	req->int1 = fd;
		1251	req->int2 = mode;
		1252	req->offs = offset;
		1253	req->size = len;
		1254
		1255	REQ_SEND;
		1256	}
		1257
		1258	void
		1259	aio_close (SV *fh, SV *callback = &PL_sv_undef)
		1260	PPCODE:
		1261	{
		1262	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1263	int fd = s_fileno_croak (fh, 0);
		1264	dREQ;
		1265
		1266	if (expect_false (close_fd < 0))
		1267	{
		1268	int pipefd [2];
		1269
		1270	if (
		1271	#ifdef _WIN32
		1272	_pipe (pipefd, 1, _O_BINARY) < 0
		1273	#else
		1274	pipe (pipefd) < 0
		1275	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1276	#endif
		1277	|| close (pipefd [1]) < 0
		1278	)
		1279	abort (); /*D*/
		1280
		1281	close_fd = pipefd [0];
		1282	}
		1283
		1284	req->type = EIO_DUP2;
		1285	req->int1 = close_fd;
		1286	req->sv2 = newSVsv (fh);
		1287	req->int2 = fd;
		1288
		1289	REQ_SEND;
		1290	}
		1291
		1292	void
		1293	aio_seek (SV *fh, SV *offset, int whence, SV *callback = &PL_sv_undef)
		1294	PPCODE:
		1295	{
		1296	int fd = s_fileno_croak (fh, 0);
		1297	dREQ;
		1298
		1299	req->type = EIO_SEEK;
		1300	req->sv1 = newSVsv (fh);
		1301	req->int1 = fd;
		1302	req->offs = SvVAL64 (offset);
		1303	req->int2 = whence;
		1304
		1305	REQ_SEND;
		1306	}
		1307
		1308	void
848	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1309	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
849	SV * fh
850	UV offset
851	UV length
852	SV * data
853	UV dataoffset
854	SV * callback
855	ALIAS:	1310	ALIAS:
856	aio_read = REQ_READ	1311	aio_read = EIO_READ
857	aio_write = REQ_WRITE	1312	aio_write = EIO_WRITE
858	PROTOTYPE: $$$$$;$
859	CODE:	1313	PPCODE:
860	{	1314	{
861	aio_req req;
862	STRLEN svlen;	1315	STRLEN svlen;
		1316	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
863	char *svptr = SvPVbyte (data, svlen);	1317	char *svptr = SvPVbyte (data, svlen);
864		1318	UV len = SvUV (length);
865	SvUPGRADE (data, SVt_PV);
866	SvPOK_on (data);
867		1319
868	if (dataoffset < 0)	1320	if (dataoffset < 0)
869	dataoffset += svlen;	1321	dataoffset += svlen;
870		1322
871	if (dataoffset < 0 || dataoffset > svlen)	1323	if (dataoffset < 0 || dataoffset > svlen)
872	croak ("data offset outside of string");	1324	croak ("dataoffset outside of data scalar");
873		1325
874	if (ix == REQ_WRITE)	1326	if (ix == EIO_WRITE)
875	{	1327	{
876	/* write: check length and adjust. */	1328	/* write: check length and adjust. */
877	if (length < 0 || length + dataoffset > svlen)	1329	if (!SvOK (length) || len + dataoffset > svlen)
878	length = svlen - dataoffset;	1330	len = svlen - dataoffset;
879	}	1331	}
880	else	1332	else
881	{	1333	{
882	/* read: grow scalar as necessary */	1334	/* read: check type and grow scalar as necessary */
		1335	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
883	svptr = SvGROW (data, length + dataoffset);	1336	svptr = sv_grow (data, len + dataoffset + 1);
		1337	else if (SvCUR (data) < len + dataoffset)
		1338	croak ("length + dataoffset outside of scalar, and cannot grow");
884	}	1339	}
885
886	if (length < 0)
887	croak ("length must not be negative");
888		1340
889	{	1341	{
890	dREQ;	1342	dREQ;
891		1343
892	req->type = ix;	1344	req->type = ix;
893	req->fh = newSVsv (fh);	1345	req->sv1 = newSVsv (fh);
894	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1346	req->int1 = fd;
895	: IoOFP (sv_2io (fh)));	1347	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
896	req->offset = offset;	1348	req->size = len;
897	req->length = length;
898	req->data = SvREFCNT_inc (data);	1349	req->sv2 = SvREFCNT_inc (data);
899	req->dataptr = (char *)svptr + dataoffset;	1350	req->ptr2 = (char *)svptr + dataoffset;
		1351	req->stroffset = dataoffset;
900		1352
901	if (!SvREADONLY (data))	1353	if (!SvREADONLY (data))
902	{	1354	{
903	SvREADONLY_on (data);	1355	SvREADONLY_on (data);
904	req->data2ptr = (void *)data;	1356	req->flags |= FLAG_SV2_RO_OFF;
905	}	1357	}
906		1358
907	send_req (req);	1359	REQ_SEND;
908	}	1360	}
909	}	1361	}
910		1362
911	void	1363	void
912	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1364	aio_ioctl (SV *fh, unsigned long request, SV8 *arg, SV *callback = &PL_sv_undef)
913	SV * out_fh
914	SV * in_fh
915	UV in_offset
916	UV length
917	SV * callback
918	PROTOTYPE: $$$$;$
919	CODE:
920	{
921	dREQ;
922
923	req->type = REQ_SENDFILE;
924	req->fh = newSVsv (out_fh);
925	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
926	req->fh2 = newSVsv (in_fh);
927	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
928	req->offset = in_offset;
929	req->length = length;
930
931	send_req (req);
932	}
933
934	void
935	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
936	SV * fh
937	UV offset
938	IV length
939	SV * callback
940	PROTOTYPE: $$$;$
941	CODE:
942	{
943	dREQ;
944
945	req->type = REQ_READAHEAD;
946	req->fh = newSVsv (fh);
947	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
948	req->offset = offset;
949	req->length = length;
950
951	send_req (req);
952	}
953
954	void
955	aio_stat(fh_or_path,callback=&PL_sv_undef)
956	SV * fh_or_path
957	SV * callback
958	ALIAS:	1365	ALIAS:
959	aio_stat = REQ_STAT	1366	aio_ioctl = EIO_IOCTL
960	aio_lstat = REQ_LSTAT	1367	aio_fcntl = EIO_FCNTL
961	CODE:	1368	PPCODE:
962	{	1369	{
963	dREQ;	1370	int fd = s_fileno_croak (fh, 0);
		1371	char *svptr;
964		1372
965	New (0, req->statdata, 1, Stat_t);	1373	if (SvPOK (arg) || !SvNIOK (arg))
966	if (!req->statdata)
967	{	1374	{
968	free_req (req);	1375	STRLEN svlen;
969	croak ("out of memory during aio_req->statdata allocation");	1376	/* perl uses IOCPARM_LEN for fcntl, so we do, too */
970	}	1377	#ifdef IOCPARM_LEN
		1378	STRLEN need = IOCPARM_LEN (request);
		1379	#else
		1380	STRLEN need = 256;
		1381	#endif
971		1382
972	if (SvPOK (fh_or_path))	1383	if (svlen < need)
973	{	1384	svptr = SvGROW (arg, need);
974	req->type = ix;
975	req->data = newSVsv (fh_or_path);
976	req->dataptr = SvPVbyte_nolen (req->data);
977	}	1385	}
978	else	1386	else
		1387	svptr = (char *)SvIV (arg);
		1388
979	{	1389	{
		1390	dREQ;
		1391
980	req->type = REQ_FSTAT;	1392	req->type = ix;
981	req->fh = newSVsv (fh_or_path);	1393	req->sv1 = newSVsv (fh);
982	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1394	req->int1 = fd;
		1395	req->int2 = (long)request;
		1396	req->sv2 = SvREFCNT_inc (arg);
		1397	req->ptr2 = svptr;
		1398
		1399	REQ_SEND;
983	}	1400	}
984
985	send_req (req);
986	}	1401	}
987		1402
988	void	1403	void
989	aio_unlink(pathname,callback=&PL_sv_undef)	1404	aio_readlink (SV8 *pathname, SV *callback = &PL_sv_undef)
990	SV * pathname
991	SV * callback
992	ALIAS:	1405	ALIAS:
993	aio_unlink = REQ_UNLINK	1406	aio_readlink = EIO_READLINK
994	aio_rmdir = REQ_RMDIR	1407	aio_realpath = EIO_REALPATH
		1408	PPCODE:
		1409	{
		1410	dREQ;
		1411
		1412	req->type = ix;
		1413	req_set_path1 (req, pathname);
		1414
		1415	REQ_SEND;
		1416	}
		1417
		1418	void
		1419	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
		1420	PPCODE:
		1421	{
		1422	int ifd = s_fileno_croak (in_fh , 0);
		1423	int ofd = s_fileno_croak (out_fh, 1);
		1424	dREQ;
		1425
		1426	req->type = EIO_SENDFILE;
		1427	req->sv1 = newSVsv (out_fh);
		1428	req->int1 = ofd;
		1429	req->sv2 = newSVsv (in_fh);
		1430	req->int2 = ifd;
		1431	req->offs = in_offset;
		1432	req->size = length;
		1433
		1434	REQ_SEND;
		1435	}
		1436
		1437	void
		1438	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback = &PL_sv_undef)
		1439	PPCODE:
		1440	{
		1441	int fd = s_fileno_croak (fh, 0);
		1442	dREQ;
		1443
		1444	req->type = EIO_READAHEAD;
		1445	req->sv1 = newSVsv (fh);
		1446	req->int1 = fd;
		1447	req->offs = offset;
		1448	req->size = length;
		1449
		1450	REQ_SEND;
		1451	}
		1452
		1453	void
		1454	aio_stat (SV8 *fh_or_path, SV *callback = &PL_sv_undef)
		1455	ALIAS:
		1456	aio_stat = EIO_STAT
		1457	aio_lstat = EIO_LSTAT
		1458	aio_statvfs = EIO_STATVFS
		1459	PPCODE:
		1460	{
		1461	dREQ;
		1462
		1463	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1464
		1465	REQ_SEND;
		1466	}
		1467
		1468	UV
		1469	major (UV dev)
		1470	ALIAS:
		1471	minor = 1
995	CODE:	1472	CODE:
		1473	RETVAL = ix ? minor (dev) : major (dev);
		1474	OUTPUT:
		1475	RETVAL
		1476
		1477	UV
		1478	makedev (UV maj, UV min)
		1479	CODE:
		1480	RETVAL = makedev (maj, min);
		1481	OUTPUT:
		1482	RETVAL
		1483
		1484	void
		1485	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback = &PL_sv_undef)
		1486	PPCODE:
		1487	{
		1488	dREQ;
		1489
		1490	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1491	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1492	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1493
		1494	REQ_SEND;
		1495	}
		1496
		1497	void
		1498	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback = &PL_sv_undef)
		1499	PPCODE:
		1500	{
		1501	dREQ;
		1502
		1503	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1504	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1505
		1506	REQ_SEND;
		1507	}
		1508
		1509	void
		1510	aio_chmod (SV8 *fh_or_path, int mode, SV *callback = &PL_sv_undef)
		1511	PPCODE:
		1512	{
		1513	dREQ;
		1514
		1515	req->int2 = mode;
		1516	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1517
		1518	REQ_SEND;
		1519	}
		1520
		1521	void
		1522	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback = &PL_sv_undef)
		1523	PPCODE:
		1524	{
		1525	dREQ;
		1526
		1527	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1528	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1529	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1530
		1531	REQ_SEND;
		1532	}
		1533
		1534	void
		1535	aio_readdirx (SV8 *pathname, IV flags, SV *callback = &PL_sv_undef)
		1536	PPCODE:
		1537	{
		1538	dREQ;
		1539
		1540	req->type = EIO_READDIR;
		1541	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1542
		1543	if (flags & EIO_READDIR_DENTS)
		1544	req->int1 |= EIO_READDIR_CUSTOM2;
		1545
		1546	req_set_path1 (req, pathname);
		1547
		1548	REQ_SEND;
		1549	}
		1550
		1551	void
		1552	aio_mkdir (SV8 *pathname, int mode, SV *callback = &PL_sv_undef)
		1553	PPCODE:
		1554	{
		1555	dREQ;
		1556
		1557	req->type = EIO_MKDIR;
		1558	req->int2 = mode;
		1559	req_set_path1 (req, pathname);
		1560
		1561	REQ_SEND;
		1562	}
		1563
		1564	void
		1565	aio_unlink (SV8 *pathname, SV *callback = &PL_sv_undef)
		1566	ALIAS:
		1567	aio_unlink = EIO_UNLINK
		1568	aio_rmdir = EIO_RMDIR
		1569	aio_readdir = EIO_READDIR
		1570	PPCODE:
996	{	1571	{
997	dREQ;	1572	dREQ;
998		1573
999	req->type = ix;	1574	req->type = ix;
1000	req->data = newSVsv (pathname);	1575	req_set_path1 (req, pathname);
1001	req->dataptr = SvPVbyte_nolen (req->data);
1002
1003	send_req (req);
1004	}
1005		1576
		1577	REQ_SEND;
		1578	}
		1579
1006	void	1580	void
1007	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1581	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
1008	SV * oldpath	1582	ALIAS:
1009	SV * newpath	1583	aio_link = EIO_LINK
1010	SV * callback	1584	aio_symlink = EIO_SYMLINK
		1585	aio_rename = EIO_RENAME
1011	CODE:	1586	PPCODE:
1012	{	1587	{
		1588	eio_wd wd2 = 0;
1013	dREQ;	1589	dREQ;
1014		1590
1015	req->type = REQ_SYMLINK;	1591	req->type = ix;
1016	req->fh = newSVsv (oldpath);	1592	req_set_path1 (req, oldpath);
1017	req->data2ptr = SvPVbyte_nolen (req->fh);	1593	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1018	req->data = newSVsv (newpath);	1594	req->int3 = (long)wd2;
1019	req->dataptr = SvPVbyte_nolen (req->data);
1020		1595
1021	send_req (req);	1596	REQ_SEND;
1022	}	1597	}
1023		1598
1024	void	1599	void
1025	aio_readdir(pathname,callback=&PL_sv_undef)	1600	aio_rename2 (SV8 *oldpath, SV8 *newpath, int flags = 0, SV *callback = &PL_sv_undef)
1026	SV * pathname
1027	SV * callback
1028	CODE:	1601	PPCODE:
1029	{	1602	{
		1603	eio_wd wd2 = 0;
1030	dREQ;	1604	dREQ;
1031		1605
1032	req->type = REQ_READDIR;	1606	req->type = EIO_RENAME;
1033	req->data = newSVsv (pathname);	1607	req_set_path1 (req, oldpath);
1034	req->dataptr = SvPVbyte_nolen (req->data);	1608	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
		1609	req->int2 = flags;
		1610	req->int3 = (long)wd2;
1035		1611
1036	send_req (req);	1612	REQ_SEND;
1037	}	1613	}
1038		1614
1039	void	1615	void
1040	flush()	1616	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
1041	PROTOTYPE:	1617	PPCODE:
		1618	{
		1619	dREQ;
		1620
		1621	req->type = EIO_MKNOD;
		1622	req->int2 = (mode_t)mode;
		1623	req->offs = dev;
		1624	req_set_path1 (req, pathname);
		1625
		1626	REQ_SEND;
		1627	}
		1628
		1629	void
		1630	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = -1, SV *callback = &PL_sv_undef)
		1631	ALIAS:
		1632	aio_mtouch = EIO_MTOUCH
		1633	aio_msync = EIO_MSYNC
		1634	PPCODE:
		1635	{
		1636	STRLEN svlen;
		1637	char *svptr = SvPVbyte (data, svlen);
		1638	UV len = SvUV (length);
		1639
		1640	if (flags < 0)
		1641	flags = ix == EIO_MSYNC ? EIO_MS_SYNC : 0;
		1642
		1643	if (offset < 0)
		1644	offset += svlen;
		1645
		1646	if (offset < 0 || offset > svlen)
		1647	croak ("offset outside of scalar");
		1648
		1649	if (!SvOK (length) || len + offset > svlen)
		1650	len = svlen - offset;
		1651
		1652	{
		1653	dREQ;
		1654
		1655	req->type = ix;
		1656	req->sv2 = SvREFCNT_inc (data);
		1657	req->ptr2 = (char *)svptr + offset;
		1658	req->size = len;
		1659	req->int1 = flags;
		1660
		1661	REQ_SEND;
		1662	}
		1663	}
		1664
		1665	void
		1666	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback = &PL_sv_undef)
		1667	PPCODE:
		1668	{
		1669	STRLEN svlen;
		1670	char *svptr = SvPVbyte (data, svlen);
		1671	UV len = SvUV (length);
		1672
		1673	if (offset < 0)
		1674	offset += svlen;
		1675
		1676	if (offset < 0 || offset > svlen)
		1677	croak ("offset outside of scalar");
		1678
		1679	if (!SvOK (length) || len + offset > svlen)
		1680	len = svlen - offset;
		1681
		1682	{
		1683	dREQ;
		1684
		1685	req->type = EIO_MLOCK;
		1686	req->sv2 = SvREFCNT_inc (data);
		1687	req->ptr2 = (char *)svptr + offset;
		1688	req->size = len;
		1689
		1690	REQ_SEND;
		1691	}
		1692	}
		1693
		1694	void
		1695	aio_mlockall (IV flags, SV *callback = &PL_sv_undef)
		1696	PPCODE:
		1697	{
		1698	dREQ;
		1699
		1700	req->type = EIO_MLOCKALL;
		1701	req->int1 = flags;
		1702
		1703	REQ_SEND;
		1704	}
		1705
		1706	void
		1707	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback = &PL_sv_undef)
		1708	PPCODE:
		1709	{
		1710	int fd = s_fileno_croak (fh, 0);
		1711	dREQ;
		1712
		1713	req->type = EIO_CUSTOM;
		1714	req->sv1 = newSVsv (fh);
		1715	req->int1 = fd;
		1716
		1717	req->feed = fiemap;
		1718	#if HAVE_FIEMAP
		1719	/* keep our fingers crossed that the next two types are 64 bit */
		1720	req->offs = start;
		1721	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1722	req->int2 = flags;
		1723	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1724	#endif
		1725
		1726	REQ_SEND;
		1727	}
		1728
		1729	void
		1730	aio_busy (double delay, SV *callback = &PL_sv_undef)
		1731	PPCODE:
		1732	{
		1733	dREQ;
		1734
		1735	req->type = EIO_BUSY;
		1736	req->nv1 = delay < 0. ? 0. : delay;
		1737
		1738	REQ_SEND;
		1739	}
		1740
		1741	void
		1742	aio_group (SV *callback = &PL_sv_undef)
		1743	PPCODE:
		1744	{
		1745	dREQ;
		1746
		1747	req->type = EIO_GROUP;
		1748
		1749	PUTBACK;
		1750	req_submit (req);
		1751	SPAGAIN;
		1752
		1753	XPUSHs (req_sv (req, aio_grp_stash));
		1754	}
		1755
		1756	void
		1757	aio_nop (SV *callback = &PL_sv_undef)
		1758	ALIAS:
		1759	aio_nop = EIO_NOP
		1760	aio_sync = EIO_SYNC
		1761	PPCODE:
		1762	{
		1763	dREQ;
		1764
		1765	req->type = ix;
		1766
		1767	REQ_SEND;
		1768	}
		1769
		1770	int
		1771	aioreq_pri (int pri = NO_INIT)
1042	CODE:	1772	CODE:
		1773	RETVAL = next_pri;
		1774	if (items > 0)
		1775	{
		1776	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1777	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1778	next_pri = pri;
		1779	}
		1780	OUTPUT:
		1781	RETVAL
		1782
		1783	void
		1784	aioreq_nice (int nice = 0)
		1785	CODE:
		1786	nice = next_pri - nice;
		1787	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1788	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1789	next_pri = nice;
		1790
		1791	void
		1792	flush ()
		1793	CODE:
1043	while (nreqs)	1794	while (eio_nreqs ())
1044	{	1795	{
1045	poll_wait ();	1796	poll_wait ();
1046	poll_cb ();	1797	poll_cb ();
1047	}	1798	}
1048		1799
1049	void	1800	int
1050	poll()	1801	poll ()
1051	PROTOTYPE:
1052	CODE:	1802	CODE:
1053	if (nreqs)
1054	{
1055	poll_wait ();	1803	poll_wait ();
1056	poll_cb ();	1804	RETVAL = poll_cb ();
1057	}
1058
1059	int
1060	poll_fileno()
1061	PROTOTYPE:
1062	CODE:
1063	RETVAL = respipe [0];
1064	OUTPUT:	1805	OUTPUT:
1065	RETVAL	1806	RETVAL
1066		1807
1067	int	1808	int
		1809	poll_fileno ()
		1810	CODE:
		1811	RETVAL = s_epipe_fd (&respipe);
		1812	OUTPUT:
		1813	RETVAL
		1814
		1815	int
1068	poll_cb(...)	1816	poll_cb (...)
1069	PROTOTYPE:	1817	PROTOTYPE:
1070	CODE:	1818	CODE:
1071	RETVAL = poll_cb ();	1819	RETVAL = poll_cb ();
1072	OUTPUT:	1820	OUTPUT:
1073	RETVAL	1821	RETVAL
1074		1822
1075	void	1823	void
1076	poll_wait()	1824	poll_wait ()
1077	PROTOTYPE:
1078	CODE:	1825	CODE:
1079	if (nreqs)
1080	poll_wait ();	1826	poll_wait ();
1081		1827
1082	int	1828	int
1083	nreqs()	1829	nreqs ()
1084	PROTOTYPE:
1085	CODE:	1830	CODE:
1086	RETVAL = nreqs;	1831	RETVAL = eio_nreqs ();
1087	OUTPUT:	1832	OUTPUT:
1088	RETVAL	1833	RETVAL
1089		1834
		1835	int
		1836	nready ()
		1837	CODE:
		1838	RETVAL = eio_nready ();
		1839	OUTPUT:
		1840	RETVAL
		1841
		1842	int
		1843	npending ()
		1844	CODE:
		1845	RETVAL = eio_npending ();
		1846	OUTPUT:
		1847	RETVAL
		1848
		1849	int
		1850	nthreads ()
		1851	CODE:
		1852	RETVAL = eio_nthreads ();
		1853	OUTPUT:
		1854	RETVAL
		1855
		1856	int
		1857	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1858	CODE:
		1859	RETVAL = posix_fadvise (fh, offset, length, advice);
		1860	OUTPUT:
		1861	RETVAL
		1862
		1863	IV
		1864	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1865	CODE:
		1866	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1867	OUTPUT:
		1868	RETVAL
		1869
		1870	void
		1871	mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1872	PPCODE:
		1873	sv_unmagic (scalar, MMAP_MAGIC);
		1874	{
		1875	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1876	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1877	if (addr == (void *)-1)
		1878	XSRETURN_NO;
		1879
		1880	sv_force_normal (scalar);
		1881
		1882	/* we store the length in mg_obj, as namlen is I32 :/ */
		1883	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1884	->mg_obj = (SV *)length;
		1885
		1886	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1887
		1888	if (!(prot & PROT_WRITE))
		1889	SvREADONLY_on (scalar);
		1890
		1891	if (SvLEN (scalar))
		1892	Safefree (SvPVX (scalar));
		1893
		1894	SvPVX (scalar) = (char *)addr;
		1895	SvCUR_set (scalar, length);
		1896	SvLEN_set (scalar, 0);
		1897	SvPOK_only (scalar);
		1898
		1899	XSRETURN_YES;
		1900	}
		1901
		1902	void
		1903	munmap (SV *scalar)
		1904	CODE:
		1905	sv_unmagic (scalar, MMAP_MAGIC);
		1906
		1907	int
		1908	madvise (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1909	ALIAS:
		1910	mprotect = 1
		1911	CODE:
		1912	{
		1913	STRLEN svlen;
		1914	void *addr = SvPVbyte (scalar, svlen);
		1915	STRLEN len = SvUV (length);
		1916
		1917	if (offset < 0)
		1918	offset += svlen;
		1919
		1920	if (offset < 0 || offset > svlen)
		1921	croak ("offset outside of scalar");
		1922
		1923	if (!SvOK (length) || len + offset > svlen)
		1924	len = svlen - offset;
		1925
		1926	addr = (void *)(((intptr_t)addr) + offset);
		1927	eio_page_align (&addr, &len);
		1928
		1929	switch (ix)
		1930	{
		1931	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1932	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1933	}
		1934	}
		1935	OUTPUT:
		1936	RETVAL
		1937
		1938	int
		1939	munlock (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef)
		1940	CODE:
		1941	{
		1942	STRLEN svlen;
		1943	void *addr = SvPVbyte (scalar, svlen);
		1944	size_t len = SvUV (length);
		1945
		1946	if (offset < 0)
		1947	offset += svlen;
		1948
		1949	if (offset < 0 || offset > svlen)
		1950	croak ("offset outside of scalar");
		1951
		1952	if (!SvOK (length) || len + offset > svlen)
		1953	len = svlen - offset;
		1954
		1955	addr = (void *)(((intptr_t)addr) + offset);
		1956	eio_page_align (&addr, &len);
		1957	#if _POSIX_MEMLOCK_RANGE
		1958	RETVAL = munlock (addr, len);
		1959	#else
		1960	RETVAL = EIO_ENOSYS ();
		1961	#endif
		1962	}
		1963	OUTPUT:
		1964	RETVAL
		1965
		1966	int
		1967	munlockall ()
		1968	CODE:
		1969	#if _POSIX_MEMLOCK
		1970	munlockall ();
		1971	#else
		1972	RETVAL = EIO_ENOSYS ();
		1973	#endif
		1974	OUTPUT:
		1975	RETVAL
		1976
		1977	int
		1978	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1979	CODE:
		1980	{
		1981	#if HAVE_LINUX_SPLICE
		1982	loff_t off_in_, off_out_;
		1983	RETVAL = splice (
		1984	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1985	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1986	length, flags
		1987	);
		1988	#else
		1989	RETVAL = EIO_ENOSYS ();
		1990	#endif
		1991	}
		1992	OUTPUT:
		1993	RETVAL
		1994
		1995	int
		1996	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1997	CODE:
		1998	#if HAVE_LINUX_SPLICE
		1999	RETVAL = tee (rfh, wfh, length, flags);
		2000	#else
		2001	RETVAL = EIO_ENOSYS ();
		2002	#endif
		2003	OUTPUT:
		2004	RETVAL
		2005
		2006	int
		2007	pipesize (aio_rfd rfh, int new_size = -1)
		2008	PROTOTYPE: $;$
		2009	CODE:
		2010	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		2011	if (new_size >= 0)
		2012	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		2013	else
		2014	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		2015	#else
		2016	errno = ENOSYS;
		2017	RETVAL = -1;
		2018	#endif
		2019	OUTPUT:
		2020	RETVAL
		2021
		2022	void
		2023	pipe2 (int flags = 0)
		2024	PROTOTYPE: ;$
		2025	PPCODE:
		2026	{
		2027	int fd[2];
		2028	int res;
		2029
		2030	if (flags)
		2031	#if HAVE_PIPE2
		2032	res = pipe2 (fd, flags);
		2033	#else
		2034	res = (errno = ENOSYS, -1);
		2035	#endif
		2036	else
		2037	res = pipe (fd);
		2038
		2039	if (!res)
		2040	{
		2041	EXTEND (SP, 2);
		2042	PUSHs (newmortalFH (fd[0], O_RDONLY));
		2043	PUSHs (newmortalFH (fd[1], O_WRONLY));
		2044	}
		2045	}
		2046
		2047	void _on_next_submit (SV *cb)
		2048	CODE:
		2049	SvREFCNT_dec (on_next_submit);
		2050	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		2051
		2052	PROTOTYPES: DISABLE
		2053
		2054	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		2055
		2056	BOOT:
		2057	{
		2058	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		2059	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		2060	}
		2061
		2062	void
		2063	DESTROY (SV *self)
		2064	CODE:
		2065	{
		2066	aio_wd wd = SvAIO_WD (self);
		2067	#if HAVE_AT
		2068	{
		2069	SV *callback = &PL_sv_undef;
		2070	dREQ; /* clobbers next_pri :/ */
		2071	next_pri = req->pri; /* restore next_pri */
		2072	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		2073	req->type = EIO_WD_CLOSE;
		2074	req->wd = wd;
		2075	REQ_SEND;
		2076	}
		2077	#else
		2078	eio_wd_close_sync (wd);
		2079	#endif
		2080	}
		2081
		2082	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		2083
		2084	void
		2085	cancel (aio_req_ornot req)
		2086	CODE:
		2087	eio_cancel (req);
		2088
		2089	void
		2090	cb (aio_req_ornot req, SV *callback = NO_INIT)
		2091	PPCODE:
		2092	{
		2093	if (GIMME_V != G_VOID)
		2094	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		2095
		2096	if (items > 1)
		2097	{
		2098	SV *cb_cv = get_cb (callback);
		2099
		2100	SvREFCNT_dec (req->callback);
		2101	req->callback = SvREFCNT_inc (cb_cv);
		2102	}
		2103	}
		2104
		2105	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		2106
		2107	void
		2108	add (aio_req grp, ...)
		2109	PPCODE:
		2110	{
		2111	int i;
		2112
		2113	if (grp->int1 == 2)
		2114	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		2115
		2116	for (i = 1; i < items; ++i )
		2117	{
		2118	aio_req req;
		2119
		2120	if (GIMME_V != G_VOID)
		2121	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		2122
		2123	req = SvAIO_REQ (ST (i));
		2124
		2125	if (req)
		2126	eio_grp_add (grp, req);
		2127	}
		2128	}
		2129
		2130	void
		2131	cancel_subs (aio_req_ornot req)
		2132	CODE:
		2133	req_cancel_subs (req);
		2134
		2135	void
		2136	result (aio_req grp, ...)
		2137	CODE:
		2138	{
		2139	int i;
		2140	AV *av;
		2141
		2142	grp->errorno = errno;
		2143
		2144	av = newAV ();
		2145	av_extend (av, items - 1);
		2146
		2147	for (i = 1; i < items; ++i )
		2148	av_push (av, newSVsv (ST (i)));
		2149
		2150	SvREFCNT_dec (grp->sv1);
		2151	grp->sv1 = (SV *)av;
		2152	}
		2153
		2154	void
		2155	errno (aio_req grp, int errorno = errno)
		2156	CODE:
		2157	grp->errorno = errorno;
		2158
		2159	void
		2160	limit (aio_req grp, int limit)
		2161	CODE:
		2162	eio_grp_limit (grp, limit);
		2163
		2164	void
		2165	feed (aio_req grp, SV *callback = &PL_sv_undef)
		2166	CODE:
		2167	{
		2168	SvREFCNT_dec (grp->sv2);
		2169	grp->sv2 = newSVsv (callback);
		2170	grp->feed = aio_grp_feed;
		2171
		2172	if (grp->int2 <= 0)
		2173	grp->int2 = 2;
		2174
		2175	eio_grp_limit (grp, grp->int2);
		2176	}
		2177

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