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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.33 by root, Mon Aug 22 23:21:57 2005 UTC vs.
Revision 1.168 by root, Wed Aug 4 14:02:58 2010 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
10	#include <pthread.h>	11	#include <stddef.h>
11		12	#include <stdlib.h>
		13	#include <errno.h>
12	#include <sys/types.h>	14	#include <sys/types.h>
13	#include <sys/stat.h>	15	#include <sys/stat.h>
14		16	#include <sys/statvfs.h>
15	#include <unistd.h>	17	#include <limits.h>
16	#include <fcntl.h>	18	#include <fcntl.h>
17	#include <signal.h>
18	#include <sched.h>	19	#include <sched.h>
19		20
20	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
21	# if __linux
22	# include <sys/sendfile.h>	22	# include <sys/mman.h>
23	# elif __freebsd	23	#endif
24	# include <sys/socket.h>	24
		25	/* perl namespace pollution */
		26	#undef VERSION
		27
		28	#ifdef _WIN32
		29
		30	# define EIO_STRUCT_DIRENT Direntry_t
		31	# undef malloc
		32	# undef free
		33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
		66	#else
		67
25	# include <sys/uio.h>	68	# include <sys/time.h>
26	# elif __hpux
27	# include <sys/socket.h>	69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		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;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/eio.h"
		124
		125	#ifndef POSIX_FADV_NORMAL
		126	# define POSIX_FADV_NORMAL 0
		127	# define NO_FADVISE 1
		128	#endif
		129	#ifndef POSIX_FADV_SEQUENTIAL
		130	# define POSIX_FADV_SEQUENTIAL 0
		131	#endif
		132	#ifndef POSIX_FADV_RANDOM
		133	# define POSIX_FADV_RANDOM 0
		134	#endif
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	#ifndef ST_NODEV
		146	# define ST_NODEV 0
		147	#endif
		148	#ifndef ST_NOEXEC
		149	# define ST_NOEXEC 0
		150	#endif
		151	#ifndef ST_SYNCHRONOUS
		152	# define ST_SYNCHRONOUS 0
		153	#endif
		154	#ifndef ST_MANDLOCK
		155	# define ST_MANDLOCK 0
		156	#endif
		157	#ifndef ST_WRITE
		158	# define ST_WRITE 0
		159	#endif
		160	#ifndef ST_APPEND
		161	# define ST_APPEND 0
		162	#endif
		163	#ifndef ST_IMMUTABLE
		164	# define ST_IMMUTABLE 0
		165	#endif
		166	#ifndef ST_NOATIME
		167	# define ST_NOATIME 0
		168	#endif
		169	#ifndef ST_NODIRATIME
		170	# define ST_NODIRATIME 0
		171	#endif
		172	#ifndef ST_RELATIME
		173	# define ST_RELATIME 0
		174	#endif
		175
		176	#ifndef MCL_CURRENT
		177	# define MCL_CURRENT 0
		178	#endif
		179	#ifndef MCL_FUTURE
		180	# define MCL_FUTURE 0
		181	#endif
		182
		183	#ifndef MAP_ANONYMOUS
		184	# ifdef MAP_ANON
		185	# define MAP_ANONYMOUS MAP_ANON
		186	# else
		187	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
28	# endif	188	# endif
29	#endif	189	#endif
30		190	#ifndef MAP_HUGETLB
31	#if __ia64	191	# define MAP_HUGETLB 0
32	# define STACKSIZE 65536
33	#else
34	# define STACKSIZE 4096
35	#endif	192	#endif
		193	#ifndef MAP_LOCKED
		194	# define MAP_LOCKED 0
		195	#endif
		196	#ifndef MAP_NORESERVE
		197	# define MAP_NORESERVE 0
		198	#endif
		199	#ifndef MAP_POPULATE
		200	# define MAP_POPULATE 0
		201	#endif
		202	#ifndef MAP_NONBLOCK
		203	# define MAP_NONBLOCK 0
		204	#endif
		205
		206	#ifndef PAGESIZE
		207	# define PAGESIZE sysconf (_SC_PAGESIZE)
		208	#endif
		209
		210	static int req_invoke (eio_req *req);
		211	#define EIO_FINISH(req) req_invoke (req)
		212	static void req_destroy (eio_req *grp);
		213	#define EIO_DESTROY(req) req_destroy (req)
36		214
37	enum {	215	enum {
38	REQ_QUIT,	216	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
39	REQ_OPEN, REQ_CLOSE,
40	REQ_READ, REQ_WRITE, REQ_READAHEAD,
41	REQ_SENDFILE,
42	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
43	REQ_FSYNC, REQ_FDATASYNC,
44	REQ_UNLINK, REQ_RMDIR,
45	REQ_SYMLINK,
46	};	217	};
47		218
48	typedef struct aio_cb {	219	#include "libeio/eio.c"
49	struct aio_cb *volatile next;
50		220
51	int type;
52
53	int fd, fd2;
54	off_t offset;
55	size_t length;
56	ssize_t result;
57	mode_t mode; /* open */
58	int errorno;
59	SV *data, *callback;
60	SV *fh, *fh2;
61	void *dataptr, *data2ptr;
62	STRLEN dataoffset;
63
64	Stat_t *statdata;
65	} aio_cb;
66
67	typedef aio_cb *aio_req;	221	typedef eio_req *aio_req;
		222	typedef eio_req *aio_req_ornot;
68		223
69	static int started, wanted;	224	static SV *on_next_submit;
70	static volatile int nreqs;	225	static int next_pri = EIO_PRI_DEFAULT;
71	static int max_outstanding = 1<<30;	226	static int max_outstanding;
72	static int respipe [2];
73		227
74	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	228	static s_epipe respipe;
75	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
76	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
77		229
78	static volatile aio_req reqs, reqe; /* queue start, queue end */	230	static void req_destroy (aio_req req);
79	static volatile aio_req ress, rese; /* queue start, queue end */
80
81	static void free_req (aio_req req)	231	static void req_cancel (aio_req req);
82	{
83	if (req->data)
84	SvREFCNT_dec (req->data);
85		232
		233	static void want_poll (void)
		234	{
		235	/* write a dummy byte to the pipe so fh becomes ready */
		236	s_epipe_signal (&respipe);
		237	}
		238
		239	static void done_poll (void)
		240	{
		241	/* read any signals sent by the worker threads */
		242	s_epipe_drain (&respipe);
		243	}
		244
		245	/* must be called at most once */
		246	static SV *req_sv (aio_req req, HV *stash)
		247	{
86	if (req->fh)	248	if (!req->self)
87	SvREFCNT_dec (req->fh);
88
89	if (req->fh2)
90	SvREFCNT_dec (req->fh2);
91
92	if (req->statdata)
93	Safefree (req->statdata);
94
95	if (req->callback)
96	SvREFCNT_dec (req->callback);
97
98	Safefree (req);
99	}
100
101	static void
102	poll_wait ()
103	{
104	if (nreqs && !ress)
105	{	249	{
106	fd_set rfd;	250	req->self = (SV *)newHV ();
107	FD_ZERO(&rfd);	251	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
108	FD_SET(respipe [0], &rfd);
109
110	select (respipe [0] + 1, &rfd, 0, 0, 0);
111	}	252	}
112	}
113		253
114	static int	254	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
115	poll_cb ()	255	}
116	{
117	dSP;
118	int count = 0;
119	int do_croak = 0;
120	aio_req req;
121		256
122	for (;;)	257	static aio_req SvAIO_REQ (SV *sv)
		258	{
		259	MAGIC *mg;
		260
		261	if (!SvROK (sv)
		262	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		263	&& SvSTASH (SvRV (sv)) != aio_req_stash
		264	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		265	croak ("object of class IO::AIO::REQ expected");
		266
		267	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		268
		269	return mg ? (aio_req)mg->mg_ptr : 0;
		270	}
		271
		272	static void aio_grp_feed (aio_req grp)
		273	{
		274	if (grp->sv2 && SvOK (grp->sv2))
123	{	275	{
124	pthread_mutex_lock (&reslock);	276	dSP;
125	req = ress;
126		277
127	if (req)	278	ENTER;
		279	SAVETMPS;
		280	PUSHMARK (SP);
		281	XPUSHs (req_sv (grp, aio_grp_stash));
		282	PUTBACK;
		283	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		284	SPAGAIN;
		285	FREETMPS;
		286	LEAVE;
		287	}
		288	}
		289
		290	static void req_submit (eio_req *req)
		291	{
		292	eio_submit (req);
		293
		294	if (expect_false (on_next_submit))
		295	{
		296	dSP;
		297	SV *cb = sv_2mortal (on_next_submit);
		298
		299	on_next_submit = 0;
		300
		301	PUSHMARK (SP);
		302	PUTBACK;
		303	call_sv (cb, G_DISCARD | G_EVAL);
		304	}
		305	}
		306
		307	static int req_invoke (eio_req *req)
		308	{
		309	if (req->flags & FLAG_SV2_RO_OFF)
		310	SvREADONLY_off (req->sv2);
		311
		312	if (!EIO_CANCELLED (req) && req->callback)
		313	{
		314	dSP;
		315	static SV *sv_result_cache; /* caches the result integer SV */
		316	SV *sv_result;
		317
		318	ENTER;
		319	SAVETMPS;
		320	PUSHMARK (SP);
		321	EXTEND (SP, 1);
		322
		323	/* do not recreate the result IV from scratch each time */
		324	if (expect_true (sv_result_cache))
128	{	325	{
129	ress = req->next;	326	sv_result = sv_result_cache; sv_result_cache = 0;
130		327	SvIV_set (sv_result, req->result);
131	if (!ress)
132	{
133	/* read any signals sent by the worker threads */
134	char buf [32];
135	while (read (respipe [0], buf, 32) == 32)
136	;
137
138	rese = 0;
139	}
140	}
141
142	pthread_mutex_unlock (&reslock);
143
144	if (!req)
145	break;
146
147	nreqs--;
148
149	if (req->type == REQ_QUIT)
150	started--;
151	else
152	{
153	int errorno = errno;
154	errno = req->errorno;
155
156	if (req->type == REQ_READ)
157	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
158
159	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
160	SvREADONLY_off (req->data);
161
162	if (req->statdata)
163	{
164	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
165	PL_laststatval = req->result;
166	PL_statcache = *(req->statdata);
167	}
168
169	ENTER;
170	PUSHMARK (SP);
171	XPUSHs (sv_2mortal (newSViv (req->result)));
172
173	if (req->type == REQ_OPEN)
174	{
175	/* convert fd to fh */
176	SV *fh;
177
178	PUTBACK;
179	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
180	SPAGAIN;
181
182	fh = SvREFCNT_inc (POPs);
183
184	PUSHMARK (SP);
185	XPUSHs (sv_2mortal (fh));
186	}
187
188	if (SvOK (req->callback))
189	{
190	PUTBACK;
191	call_sv (req->callback, G_VOID | G_EVAL);
192	SPAGAIN;
193
194	if (SvTRUE (ERRSV))
195	{
196	free_req (req);
197	croak (0);
198	}
199	}
200
201	LEAVE;
202
203	errno = errorno;
204	count++;
205	}
206
207	free_req (req);
208	}
209
210	return count;
211	}
212
213	static void *aio_proc(void *arg);
214
215	static void
216	start_thread (void)
217	{
218	sigset_t fullsigset, oldsigset;
219	pthread_t tid;
220	pthread_attr_t attr;
221
222	pthread_attr_init (&attr);
223	pthread_attr_setstacksize (&attr, STACKSIZE);
224	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
225
226	sigfillset (&fullsigset);
227	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
228
229	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
230	started++;
231
232	sigprocmask (SIG_SETMASK, &oldsigset, 0);
233	}
234
235	static void
236	send_req (aio_req req)
237	{
238	while (started < wanted && nreqs >= started)
239	start_thread ();
240
241	nreqs++;
242
243	pthread_mutex_lock (&reqlock);
244
245	req->next = 0;
246
247	if (reqe)
248	{
249	reqe->next = req;
250	reqe = req;
251	}
252	else
253	reqe = reqs = req;
254
255	pthread_cond_signal (&reqwait);
256	pthread_mutex_unlock (&reqlock);
257
258	if (nreqs > max_outstanding)
259	for (;;)
260	{
261	poll_cb ();
262
263	if (nreqs <= max_outstanding)
264	break;
265
266	poll_wait ();
267	}
268	}
269
270	static void
271	end_thread (void)
272	{
273	aio_req req;
274	Newz (0, req, 1, aio_cb);
275	req->type = REQ_QUIT;
276
277	send_req (req);
278	}
279
280	static void min_parallel (int nthreads)
281	{
282	if (wanted < nthreads)
283	wanted = nthreads;
284	}
285
286	static void max_parallel (int nthreads)
287	{
288	int cur = started;
289
290	if (wanted > nthreads)
291	wanted = nthreads;
292
293	while (cur > wanted)
294	{
295	end_thread ();
296	cur--;
297	}
298
299	while (started > wanted)
300	{
301	poll_wait ();
302	poll_cb ();
303	}
304	}
305
306	static void create_pipe ()
307	{
308	if (pipe (respipe))
309	croak ("unable to initialize result pipe");
310
311	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
312	croak ("cannot set result pipe to nonblocking mode");
313
314	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
315	croak ("cannot set result pipe to nonblocking mode");
316	}
317
318	static void atfork_prepare (void)
319	{
320	pthread_mutex_lock (&reqlock);
321	pthread_mutex_lock (&reslock);
322	}
323
324	static void atfork_parent (void)
325	{
326	pthread_mutex_unlock (&reslock);
327	pthread_mutex_unlock (&reqlock);
328	}
329
330	static void atfork_child (void)
331	{
332	aio_req prv;
333
334	started = 0;
335
336	while (reqs)
337	{
338	prv = reqs;
339	reqs = prv->next;
340	free_req (prv);
341	}
342
343	reqs = reqe = 0;
344
345	while (ress)
346	{
347	prv = ress;
348	ress = prv->next;
349	free_req (prv);
350	}
351
352	ress = rese = 0;
353
354	close (respipe [0]);
355	close (respipe [1]);
356	create_pipe ();
357
358	atfork_parent ();
359	}
360
361	/*****************************************************************************/
362	/* work around various missing functions */
363
364	#if !HAVE_PREADWRITE
365	# define pread aio_pread
366	# define pwrite aio_pwrite
367
368	/*
369	* make our pread/pwrite safe against themselves, but not against
370	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.
372	*/
373	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
374
375	static ssize_t
376	pread (int fd, void *buf, size_t count, off_t offset)
377	{
378	ssize_t res;
379	off_t ooffset;
380
381	pthread_mutex_lock (&iolock);
382	ooffset = lseek (fd, 0, SEEK_CUR);
383	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&iolock);
387
388	return res;
389	}
390
391	static ssize_t
392	pwrite (int fd, void *buf, size_t count, off_t offset)
393	{
394	ssize_t res;
395	off_t ooffset;
396
397	pthread_mutex_lock (&iolock);
398	ooffset = lseek (fd, 0, SEEK_CUR);
399	lseek (fd, offset, SEEK_SET);
400	res = write (fd, buf, count);
401	lseek (fd, offset, SEEK_SET);
402	pthread_mutex_unlock (&iolock);
403
404	return res;
405	}
406	#endif
407
408	#if !HAVE_FDATASYNC
409	# define fdatasync fsync
410	#endif
411
412	#if !HAVE_READAHEAD
413	# define readahead aio_readahead
414
415	static char readahead_buf[4096];
416
417	static ssize_t
418	readahead (int fd, off_t offset, size_t count)
419	{
420	while (count > 0)
421	{
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
423
424	pread (fd, readahead_buf, len, offset);
425	offset += len;
426	count -= len;
427	}
428
429	errno = 0;
430	}
431	#endif
432
433	/* sendfile always needs emulation */
434	static ssize_t
435	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
436	{
437	ssize_t res;
438
439	if (!count)
440	return 0;
441
442	#if __linux
443	res = sendfile (ofd, ifd, &offset, count);
444
445	#elif __freebsd
446	/*
447	* Of course, the freebsd sendfile is a dire hack with no thoughts
448	* wasted on making it similar to other i/o functions.
449	*/
450	{
451	off_t sbytes;
452	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
453
454	if (!res && errno == EAGAIN)
455	/* maybe on others, too, as usual, the manpage leaves you guessing */
456	res = sbytes;
457	}
458
459	#elif __hpux
460	res = sendfile (ofd, ifd, offset, count, 0, 0);
461
462	#else
463	res = -1;
464	errno = ENOSYS;
465	#endif
466
467	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))
468	{
469	/* emulate sendfile. this is a major pain in the ass */
470	char *buf = malloc (4096);
471	res = 0;
472
473	for (;;)
474	{
475	ssize_t cnt;
476
477	cnt = pread (ifd, buf, 4096, offset);
478
479	if (cnt <= 0)
480	{
481	if (cnt && !res) res = -1;
482	break;
483	}
484
485	cnt = write (ofd, buf, cnt);
486
487	if (cnt <= 0)
488	{
489	if (cnt && !res) res = -1;
490	break;
491	}
492
493	offset += cnt;
494	res += cnt;
495	}
496
497	{
498	int errorno = errno;
499	free (buf);
500	errno = errorno;
501	}
502	}
503
504	return res;
505	}
506
507	/*****************************************************************************/
508
509	static void *
510	aio_proc (void *thr_arg)
511	{
512	aio_req req;
513	int type;
514
515	do
516	{
517	pthread_mutex_lock (&reqlock);
518
519	for (;;)
520	{
521	req = reqs;
522
523	if (reqs)
524	{
525	reqs = reqs->next;
526	if (!reqs) reqe = 0;
527	}
528
529	if (req)
530	break;
531
532	pthread_cond_wait (&reqwait, &reqlock);
533	}
534
535	pthread_mutex_unlock (&reqlock);
536
537	errno = 0; /* strictly unnecessary */
538
539	type = req->type;
540
541	switch (type)
542	{
543	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
544	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
545
546	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
547	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
548
549	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
550	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
551	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
552
553	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
554	case REQ_CLOSE: req->result = close (req->fd); break;
555	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
556	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
557	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
558
559	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
560	case REQ_FSYNC: req->result = fsync (req->fd); break;
561
562	case REQ_QUIT:
563	break;
564
565	default:
566	req->result = ENOSYS;
567	break;
568	}
569
570	req->errorno = errno;
571
572	pthread_mutex_lock (&reslock);
573
574	req->next = 0;
575
576	if (rese)
577	{
578	rese->next = req;
579	rese = req;
580	}	328	}
581	else	329	else
582	{	330	{
583	rese = ress = req;	331	sv_result = newSViv (req->result);
584		332	SvREADONLY_on (sv_result);
585	/* write a dummy byte to the pipe so fh becomes ready */
586	write (respipe [1], &respipe, 1);
587	}	333	}
588		334
589	pthread_mutex_unlock (&reslock);	335	switch (req->type)
		336	{
		337	case EIO_READDIR:
		338	{
		339	SV *rv = &PL_sv_undef;
		340
		341	if (req->result >= 0)
		342	{
		343	int i;
		344	char *names = (char *)req->ptr2;
		345	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		346	AV *av = newAV ();
		347
		348	av_extend (av, req->result - 1);
		349
		350	for (i = 0; i < req->result; ++i)
		351	{
		352	if (req->int1 & EIO_READDIR_DENTS)
		353	{
		354	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		355
		356	if (req->int1 & EIO_READDIR_CUSTOM2)
		357	{
		358	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		359	AV *avent = newAV ();
		360
		361	av_extend (avent, 2);
		362
		363	if (!sv_type [ent->type])
		364	{
		365	sv_type [ent->type] = newSViv (ent->type);
		366	SvREADONLY_on (sv_type [ent->type]);
		367	}
		368
		369	av_store (avent, 0, namesv);
		370	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		371	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		372
		373	av_store (av, i, newRV_noinc ((SV *)avent));
		374	}
		375	else
		376	av_store (av, i, namesv);
		377
		378	++ent;
		379	}
		380	else
		381	{
		382	SV *name = newSVpv (names, 0);
		383	av_store (av, i, name);
		384	names += SvCUR (name) + 1;
		385	}
		386	}
		387
		388	rv = sv_2mortal (newRV_noinc ((SV *)av));
		389	}
		390
		391	PUSHs (rv);
		392
		393	if (req->int1 & EIO_READDIR_CUSTOM1)
		394	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		395	}
		396	break;
		397
		398	case EIO_OPEN:
		399	{
		400	/* convert fd to fh */
		401	SV *fh = &PL_sv_undef;
		402
		403	if (req->result >= 0)
		404	{
		405	GV *gv = (GV *)sv_newmortal ();
		406	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		407	char sym [64];
		408	int symlen;
		409
		410	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		411	gv_init (gv, aio_stash, sym, symlen, 0);
		412
		413	symlen = snprintf (
		414	sym,
		415	sizeof (sym),
		416	"%s&=%d",
		417	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		418	(int)req->result
		419	);
		420
		421	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		422	fh = (SV *)gv;
		423	}
		424
		425	PUSHs (fh);
		426	}
		427	break;
		428
		429	case EIO_STATVFS:
		430	case EIO_FSTATVFS:
		431	{
		432	SV *rv = &PL_sv_undef;
		433
		434	if (req->result >= 0)
		435	{
		436	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		437	HV *hv = newHV ();
		438
		439	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		440
		441	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		442	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		443	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		444	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		445	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		446	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		447	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		448	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		449	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		450	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		451	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		452	}
		453
		454	PUSHs (rv);
		455	}
		456
		457	break;
		458
		459	case EIO_GROUP:
		460	req->int1 = 2; /* mark group as finished */
		461
		462	if (req->sv1)
		463	{
		464	int i;
		465	AV *av = (AV *)req->sv1;
		466
		467	EXTEND (SP, AvFILL (av) + 1);
		468	for (i = 0; i <= AvFILL (av); ++i)
		469	PUSHs (*av_fetch (av, i, 0));
		470	}
		471	break;
		472
		473	case EIO_NOP:
		474	case EIO_BUSY:
		475	break;
		476
		477	case EIO_READLINK:
		478	if (req->result > 0)
		479	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		480	break;
		481
		482	case EIO_STAT:
		483	case EIO_LSTAT:
		484	case EIO_FSTAT:
		485	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		486	PL_laststatval = req->result;
		487	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		488	PUSHs (sv_result);
		489	break;
		490
		491	case EIO_READ:
		492	{
		493	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		494	*SvEND (req->sv2) = 0;
		495	SvPOK_only (req->sv2);
		496	SvSETMAGIC (req->sv2);
		497	PUSHs (sv_result);
		498	}
		499	break;
		500
		501	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		502	if (req->result > 0)
		503	SvIV_set (sv_result, 0);
		504	/* FALLTHROUGH */
		505
		506	default:
		507	PUSHs (sv_result);
		508	break;
		509	}
		510
		511	errno = req->errorno;
		512
		513	PUTBACK;
		514	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		515	SPAGAIN;
		516
		517	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		518	SvREFCNT_dec (sv_result);
		519	else
		520	sv_result_cache = sv_result;
		521
		522	FREETMPS;
		523	LEAVE;
		524
		525	PUTBACK;
590	}	526	}
591	while (type != REQ_QUIT);	527
		528	return !!SvTRUE (ERRSV);
		529	}
		530
		531	static void req_destroy (aio_req req)
		532	{
		533	if (req->self)
		534	{
		535	sv_unmagic (req->self, PERL_MAGIC_ext);
		536	SvREFCNT_dec (req->self);
		537	}
		538
		539	SvREFCNT_dec (req->sv1);
		540	SvREFCNT_dec (req->sv2);
		541	SvREFCNT_dec (req->callback);
		542
		543	Safefree (req);
		544	}
		545
		546	static void req_cancel_subs (aio_req grp)
		547	{
		548	aio_req sub;
		549
		550	if (grp->type != EIO_GROUP)
		551	return;
		552
		553	SvREFCNT_dec (grp->sv2);
		554	grp->sv2 = 0;
		555
		556	eio_grp_cancel (grp);
		557	}
		558
		559	static void
		560	create_respipe (void)
		561	{
		562	if (s_epipe_renew (&respipe))
		563	croak ("IO::AIO: unable to initialize result pipe");
		564	}
		565
		566	static void poll_wait (void)
		567	{
		568	while (eio_nreqs ())
		569	{
		570	int size;
		571
		572	X_LOCK (reslock);
		573	size = res_queue.size;
		574	X_UNLOCK (reslock);
		575
		576	if (size)
		577	return;
		578
		579	etp_maybe_start_thread ();
		580
		581	s_epipe_wait (&respipe);
		582	}
		583	}
		584
		585	static int poll_cb (void)
		586	{
		587	for (;;)
		588	{
		589	int res = eio_poll ();
		590
		591	if (res > 0)
		592	croak (0);
		593
		594	if (!max_outstanding || max_outstanding > eio_nreqs ())
		595	return res;
		596
		597	poll_wait ();
		598	}
		599	}
		600
		601	static void atfork_child (void)
		602	{
		603	create_respipe ();
		604	}
		605
		606	/*****************************************************************************/
		607
		608	#if !_POSIX_MAPPED_FILES
		609	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		610	# define munmap(addr,length) (errno = ENOSYS, -1)
		611	#endif
		612
		613	#define MMAP_MAGIC PERL_MAGIC_ext
		614
		615	static int
		616	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		617	{
		618	int old_errno = errno;
		619	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		620	errno = old_errno;
		621
		622	mg->mg_obj = 0; /* just in case */
		623
		624	SvREADONLY_off (sv);
		625
		626	if (SvPVX (sv) != mg->mg_ptr)
		627	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		628
		629	SvCUR_set (sv, 0);
		630	SvPVX (sv) = 0;
		631	SvOK_off (sv);
592		632
593	return 0;	633	return 0;
594	}	634	}
595		635
		636	static MGVTBL mmap_vtbl = {
		637	0, 0, 0, 0, mmap_free
		638	};
		639
		640	/*****************************************************************************/
		641
		642	static SV *
		643	get_cb (SV *cb_sv)
		644	{
		645	SvGETMAGIC (cb_sv);
		646	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		647	}
		648
596	#define dREQ \	649	#define dREQ \
		650	SV *cb_cv; \
597	aio_req req; \	651	aio_req req; \
		652	int req_pri = next_pri; \
		653	next_pri = EIO_PRI_DEFAULT; \
598	\	654	\
599	if (SvOK (callback) && !SvROK (callback)) \	655	cb_cv = get_cb (callback); \
600	croak ("clalback must be undef or of reference type"); \
601	\	656	\
602	Newz (0, req, 1, aio_cb); \	657	Newz (0, req, 1, eio_req); \
603	if (!req) \	658	if (!req) \
604	croak ("out of memory during aio_req allocation"); \	659	croak ("out of memory during eio_req allocation"); \
605	\	660	\
606	req->callback = newSVsv (callback);	661	req->callback = SvREFCNT_inc (cb_cv); \
607		662	req->pri = req_pri
		663
		664	#define REQ_SEND \
		665	PUTBACK; \
		666	req_submit (req); \
		667	SPAGAIN; \
		668	\
		669	if (GIMME_V != G_VOID) \
		670	XPUSHs (req_sv (req, aio_req_stash));
		671
608	MODULE = IO::AIO PACKAGE = IO::AIO	672	MODULE = IO::AIO PACKAGE = IO::AIO
609		673
610	PROTOTYPES: ENABLE	674	PROTOTYPES: ENABLE
611		675
612	BOOT:	676	BOOT:
613	{	677	{
		678	static const struct {
		679	const char *name;
		680	IV iv;
		681	} *civ, const_iv[] = {
		682	# define const_niv(name, value) { # name, (IV) value },
		683	# define const_iv(name) { # name, (IV) name },
		684	# define const_eio(name) { # name, (IV) EIO_ ## name },
		685	const_iv (EXDEV)
		686	const_iv (ENOSYS)
		687	const_iv (O_RDONLY)
		688	const_iv (O_WRONLY)
		689	const_iv (O_RDWR)
		690	const_iv (O_CREAT)
		691	const_iv (O_TRUNC)
		692	const_iv (O_EXCL)
		693	const_iv (O_APPEND)
		694	#ifndef _WIN32
		695	const_iv (S_IFIFO)
		696	#endif
		697	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		698	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		699	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		700	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		701	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		702	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		703
		704	const_iv (ST_RDONLY)
		705	const_iv (ST_NOSUID)
		706	const_iv (ST_NODEV)
		707	const_iv (ST_NOEXEC)
		708	const_iv (ST_SYNCHRONOUS)
		709	const_iv (ST_MANDLOCK)
		710	const_iv (ST_WRITE)
		711	const_iv (ST_APPEND)
		712	const_iv (ST_IMMUTABLE)
		713	const_iv (ST_NOATIME)
		714	const_iv (ST_NODIRATIME)
		715	const_iv (ST_RELATIME)
		716
		717	const_iv (PROT_EXEC)
		718	const_iv (PROT_NONE)
		719	const_iv (PROT_READ)
		720	const_iv (PROT_WRITE)
		721
		722	/*const_iv (MAP_FIXED)*/
		723	const_iv (MAP_PRIVATE)
		724	const_iv (MAP_SHARED)
		725	const_iv (MAP_ANONYMOUS)
		726
		727	/* linuxish */
		728	const_iv (MAP_HUGETLB)
		729	const_iv (MAP_LOCKED)
		730	const_iv (MAP_NORESERVE)
		731	const_iv (MAP_POPULATE)
		732	const_iv (MAP_NONBLOCK)
		733
		734	const_iv (MCL_FUTURE)
		735	const_iv (MCL_CURRENT)
		736
		737	const_eio (MS_ASYNC)
		738	const_eio (MS_INVALIDATE)
		739	const_eio (MS_SYNC)
		740
		741	const_eio (MT_MODIFY)
		742
		743	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		744	const_eio (SYNC_FILE_RANGE_WRITE)
		745	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		746
		747	const_eio (READDIR_DENTS)
		748	const_eio (READDIR_DIRS_FIRST)
		749	const_eio (READDIR_STAT_ORDER)
		750	const_eio (READDIR_FOUND_UNKNOWN)
		751
		752	const_eio (DT_UNKNOWN)
		753	const_eio (DT_FIFO)
		754	const_eio (DT_CHR)
		755	const_eio (DT_DIR)
		756	const_eio (DT_BLK)
		757	const_eio (DT_REG)
		758	const_eio (DT_LNK)
		759	const_eio (DT_SOCK)
		760	const_eio (DT_WHT)
		761	};
		762
		763	aio_stash = gv_stashpv ("IO::AIO" , 1);
		764	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		765	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		766
		767	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		768	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		769
		770	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		771
614	create_pipe ();	772	create_respipe ();
615	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
616	}
617		773
		774	if (eio_init (want_poll, done_poll) < 0)
		775	croak ("IO::AIO: unable to initialise eio library");
		776
		777	/* atfork child called in fifo order, so before eio's handler */
		778	X_THREAD_ATFORK (0, 0, atfork_child);
		779	}
		780
618	void	781	void
619	min_parallel(nthreads)	782	max_poll_reqs (int nreqs)
620	int nthreads
621	PROTOTYPE: $	783	PROTOTYPE: $
		784	CODE:
		785	eio_set_max_poll_reqs (nreqs);
622		786
623	void	787	void
624	max_parallel(nthreads)	788	max_poll_time (double nseconds)
625	int nthreads
626	PROTOTYPE: $	789	PROTOTYPE: $
627
628	int
629	max_outstanding(nreqs)
630	int nreqs
631	PROTOTYPE: $
632	CODE:	790	CODE:
633	RETVAL = max_outstanding;	791	eio_set_max_poll_time (nseconds);
		792
		793	void
		794	min_parallel (int nthreads)
		795	PROTOTYPE: $
		796	CODE:
		797	eio_set_min_parallel (nthreads);
		798
		799	void
		800	max_parallel (int nthreads)
		801	PROTOTYPE: $
		802	CODE:
		803	eio_set_max_parallel (nthreads);
		804
		805	void
		806	max_idle (int nthreads)
		807	PROTOTYPE: $
		808	CODE:
		809	eio_set_max_idle (nthreads);
		810
		811	void
		812	max_outstanding (int maxreqs)
		813	PROTOTYPE: $
		814	CODE:
634	max_outstanding = nreqs;	815	max_outstanding = maxreqs;
635		816
636	void	817	void
637	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	818	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
638	SV * pathname
639	int flags
640	int mode
641	SV * callback
642	PROTOTYPE: $$$;$	819	PROTOTYPE: $$$;$
643	CODE:	820	PPCODE:
644	{	821	{
645	dREQ;	822	dREQ;
646		823
647	req->type = REQ_OPEN;	824	req->type = EIO_OPEN;
648	req->data = newSVsv (pathname);	825	req->sv1 = newSVsv (pathname);
649	req->dataptr = SvPVbyte_nolen (req->data);	826	req->ptr1 = SvPVbyte_nolen (req->sv1);
650	req->fd = flags;	827	req->int1 = flags;
651	req->mode = mode;	828	req->int2 = mode;
652		829
653	send_req (req);	830	REQ_SEND;
654	}	831	}
655		832
656	void	833	void
657	aio_close(fh,callback=&PL_sv_undef)	834	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
658	SV * fh
659	SV * callback
660	PROTOTYPE: $;$	835	PROTOTYPE: $;$
661	ALIAS:	836	ALIAS:
662	aio_close = REQ_CLOSE
663	aio_fsync = REQ_FSYNC	837	aio_fsync = EIO_FSYNC
664	aio_fdatasync = REQ_FDATASYNC	838	aio_fdatasync = EIO_FDATASYNC
665	CODE:	839	PPCODE:
666	{	840	{
		841	int fd = s_fileno_croak (fh, 0);
667	dREQ;	842	dREQ;
668		843
669	req->type = ix;	844	req->type = ix;
670	req->fh = newSVsv (fh);	845	req->sv1 = newSVsv (fh);
671	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	846	req->int1 = fd;
672		847
673	send_req (req);	848	REQ_SEND (req);
674	}	849	}
675		850
676	void	851	void
		852	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		853	PROTOTYPE: $$$$;$
		854	PPCODE:
		855	{
		856	int fd = s_fileno_croak (fh, 0);
		857	dREQ;
		858
		859	req->type = EIO_SYNC_FILE_RANGE;
		860	req->sv1 = newSVsv (fh);
		861	req->int1 = fd;
		862	req->offs = offset;
		863	req->size = nbytes;
		864	req->int2 = flags;
		865
		866	REQ_SEND (req);
		867	}
		868
		869	void
		870	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		871	PROTOTYPE: $;$
		872	PPCODE:
		873	{
		874	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		875	int fd = s_fileno_croak (fh, 0);
		876	dREQ;
		877
		878	if (close_pipe < 0)
		879	{
		880	int pipefd [2];
		881
		882	if (pipe (pipefd) < 0
		883	|| close (pipefd [1]) < 0
		884	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		885	abort (); /*D*/
		886
		887	close_pipe = pipefd [0];
		888	}
		889
		890	req->type = EIO_DUP2;
		891	req->int1 = close_pipe;
		892	req->sv2 = newSVsv (fh);
		893	req->int2 = fd;
		894
		895	REQ_SEND (req);
		896	}
		897
		898	void
677	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	899	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
678	SV * fh
679	UV offset
680	UV length
681	SV * data
682	UV dataoffset
683	SV * callback
684	ALIAS:	900	ALIAS:
685	aio_read = REQ_READ	901	aio_read = EIO_READ
686	aio_write = REQ_WRITE	902	aio_write = EIO_WRITE
687	PROTOTYPE: $$$$$;$	903	PROTOTYPE: $$$$$;$
688	CODE:	904	PPCODE:
689	{	905	{
690	aio_req req;
691	STRLEN svlen;	906	STRLEN svlen;
		907	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
692	char *svptr = SvPVbyte (data, svlen);	908	char *svptr = SvPVbyte (data, svlen);
693		909	UV len = SvUV (length);
694	SvUPGRADE (data, SVt_PV);
695	SvPOK_on (data);
696		910
697	if (dataoffset < 0)	911	if (dataoffset < 0)
698	dataoffset += svlen;	912	dataoffset += svlen;
699		913
700	if (dataoffset < 0 || dataoffset > svlen)	914	if (dataoffset < 0 || dataoffset > svlen)
701	croak ("data offset outside of string");	915	croak ("dataoffset outside of data scalar");
702		916
703	if (ix == REQ_WRITE)	917	if (ix == EIO_WRITE)
704	{	918	{
705	/* write: check length and adjust. */	919	/* write: check length and adjust. */
706	if (length < 0 || length + dataoffset > svlen)	920	if (!SvOK (length) || len + dataoffset > svlen)
707	length = svlen - dataoffset;	921	len = svlen - dataoffset;
708	}	922	}
709	else	923	else
710	{	924	{
711	/* read: grow scalar as necessary */	925	/* read: check type and grow scalar as necessary */
		926	SvUPGRADE (data, SVt_PV);
712	svptr = SvGROW (data, length + dataoffset);	927	svptr = SvGROW (data, len + dataoffset + 1);
713	}	928	}
714
715	if (length < 0)
716	croak ("length must not be negative");
717		929
718	{	930	{
719	dREQ;	931	dREQ;
720		932
721	req->type = ix;	933	req->type = ix;
722	req->fh = newSVsv (fh);	934	req->sv1 = newSVsv (fh);
723	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	935	req->int1 = fd;
724	: IoOFP (sv_2io (fh)));	936	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
725	req->offset = offset;	937	req->size = len;
726	req->length = length;
727	req->data = SvREFCNT_inc (data);	938	req->sv2 = SvREFCNT_inc (data);
728	req->dataptr = (char *)svptr + dataoffset;	939	req->ptr2 = (char *)svptr + dataoffset;
		940	req->stroffset = dataoffset;
729		941
730	if (!SvREADONLY (data))	942	if (!SvREADONLY (data))
731	{	943	{
732	SvREADONLY_on (data);	944	SvREADONLY_on (data);
733	req->data2ptr = (void *)data;	945	req->flags |= FLAG_SV2_RO_OFF;
734	}	946	}
735		947
736	send_req (req);	948	REQ_SEND;
737	}	949	}
738	}	950	}
739		951
740	void	952	void
		953	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		954	PROTOTYPE: $$;$
		955	PPCODE:
		956	{
		957	SV *data;
		958	dREQ;
		959
		960	req->type = EIO_READLINK;
		961	req->sv1 = newSVsv (path);
		962	req->ptr1 = SvPVbyte_nolen (req->sv1);
		963
		964	REQ_SEND;
		965	}
		966
		967	void
741	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	968	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
742	SV * out_fh
743	SV * in_fh
744	UV in_offset
745	UV length
746	SV * callback
747	PROTOTYPE: $$$$;$	969	PROTOTYPE: $$$$;$
748	CODE:	970	PPCODE:
749	{	971	{
		972	int ifd = s_fileno_croak (in_fh , 0);
		973	int ofd = s_fileno_croak (out_fh, 1);
750	dREQ;	974	dREQ;
751		975
752	req->type = REQ_SENDFILE;	976	req->type = EIO_SENDFILE;
753	req->fh = newSVsv (out_fh);	977	req->sv1 = newSVsv (out_fh);
754	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	978	req->int1 = ofd;
755	req->fh2 = newSVsv (in_fh);	979	req->sv2 = newSVsv (in_fh);
756	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	980	req->int2 = ifd;
757	req->offset = in_offset;	981	req->offs = in_offset;
758	req->length = length;	982	req->size = length;
759		983
760	send_req (req);	984	REQ_SEND;
761	}	985	}
762		986
763	void	987	void
764	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	988	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
765	SV * fh
766	UV offset
767	IV length
768	SV * callback
769	PROTOTYPE: $$$;$	989	PROTOTYPE: $$$;$
770	CODE:	990	PPCODE:
771	{	991	{
		992	int fd = s_fileno_croak (fh, 0);
772	dREQ;	993	dREQ;
773		994
774	req->type = REQ_READAHEAD;	995	req->type = EIO_READAHEAD;
775	req->fh = newSVsv (fh);	996	req->sv1 = newSVsv (fh);
776	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	997	req->int1 = fd;
777	req->offset = offset;	998	req->offs = offset;
778	req->length = length;	999	req->size = length;
779		1000
780	send_req (req);	1001	REQ_SEND;
781	}	1002	}
782		1003
783	void	1004	void
784	aio_stat(fh_or_path,callback=&PL_sv_undef)	1005	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
785	SV * fh_or_path
786	SV * callback
787	ALIAS:	1006	ALIAS:
788	aio_stat = REQ_STAT	1007	aio_stat = EIO_STAT
789	aio_lstat = REQ_LSTAT	1008	aio_lstat = EIO_LSTAT
		1009	aio_statvfs = EIO_STATVFS
790	CODE:	1010	PPCODE:
791	{	1011	{
792	dREQ;	1012	dREQ;
793		1013
794	New (0, req->statdata, 1, Stat_t);	1014	req->sv1 = newSVsv (fh_or_path);
795	if (!req->statdata)
796	{
797	free_req (req);
798	croak ("out of memory during aio_req->statdata allocation");
799	}
800		1015
801	if (SvPOK (fh_or_path))	1016	if (SvPOK (req->sv1))
802	{	1017	{
803	req->type = ix;	1018	req->type = ix;
804	req->data = newSVsv (fh_or_path);
805	req->dataptr = SvPVbyte_nolen (req->data);	1019	req->ptr1 = SvPVbyte_nolen (req->sv1);
806	}	1020	}
807	else	1021	else
808	{	1022	{
809	req->type = REQ_FSTAT;	1023	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
810	req->fh = newSVsv (fh_or_path);
811	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1024	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
812	}	1025	}
813		1026
814	send_req (req);	1027	REQ_SEND;
815	}	1028	}
816		1029
817	void	1030	void
		1031	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1032	PPCODE:
		1033	{
		1034	dREQ;
		1035
		1036	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1037	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1038	req->sv1 = newSVsv (fh_or_path);
		1039
		1040	if (SvPOK (req->sv1))
		1041	{
		1042	req->type = EIO_UTIME;
		1043	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1044	}
		1045	else
		1046	{
		1047	req->type = EIO_FUTIME;
		1048	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1049	}
		1050
		1051	REQ_SEND;
		1052	}
		1053
		1054	void
		1055	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1056	PPCODE:
		1057	{
		1058	dREQ;
		1059
		1060	req->sv1 = newSVsv (fh_or_path);
		1061	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1062
		1063	if (SvPOK (req->sv1))
		1064	{
		1065	req->type = EIO_TRUNCATE;
		1066	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1067	}
		1068	else
		1069	{
		1070	req->type = EIO_FTRUNCATE;
		1071	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1072	}
		1073
		1074	REQ_SEND;
		1075	}
		1076
		1077	void
		1078	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1079	ALIAS:
		1080	aio_chmod = EIO_CHMOD
		1081	aio_mkdir = EIO_MKDIR
		1082	PPCODE:
		1083	{
		1084	dREQ;
		1085
		1086	req->int2 = mode;
		1087	req->sv1 = newSVsv (fh_or_path);
		1088
		1089	if (SvPOK (req->sv1))
		1090	{
		1091	req->type = ix;
		1092	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1093	}
		1094	else
		1095	{
		1096	req->type = EIO_FCHMOD;
		1097	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1098	}
		1099
		1100	REQ_SEND;
		1101	}
		1102
		1103	void
		1104	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1105	PPCODE:
		1106	{
		1107	dREQ;
		1108
		1109	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1110	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1111	req->sv1 = newSVsv (fh_or_path);
		1112
		1113	if (SvPOK (req->sv1))
		1114	{
		1115	req->type = EIO_CHOWN;
		1116	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1117	}
		1118	else
		1119	{
		1120	req->type = EIO_FCHOWN;
		1121	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1122	}
		1123
		1124	REQ_SEND;
		1125	}
		1126
		1127	void
		1128	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1129	PPCODE:
		1130	{
		1131	dREQ;
		1132
		1133	req->type = EIO_READDIR;
		1134	req->sv1 = newSVsv (pathname);
		1135	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1136	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1137
		1138	if (flags & EIO_READDIR_DENTS)
		1139	req->int1 |= EIO_READDIR_CUSTOM2;
		1140
		1141	REQ_SEND;
		1142	}
		1143
		1144	void
818	aio_unlink(pathname,callback=&PL_sv_undef)	1145	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
819	SV * pathname
820	SV * callback
821	ALIAS:	1146	ALIAS:
822	aio_unlink = REQ_UNLINK	1147	aio_unlink = EIO_UNLINK
823	aio_rmdir = REQ_RMDIR	1148	aio_rmdir = EIO_RMDIR
		1149	aio_readdir = EIO_READDIR
824	CODE:	1150	PPCODE:
825	{	1151	{
826	dREQ;	1152	dREQ;
827		1153
828	req->type = ix;	1154	req->type = ix;
829	req->data = newSVsv (pathname);	1155	req->sv1 = newSVsv (pathname);
830	req->dataptr = SvPVbyte_nolen (req->data);	1156	req->ptr1 = SvPVbyte_nolen (req->sv1);
831
832	send_req (req);
833	}
834		1157
		1158	REQ_SEND;
		1159	}
		1160
835	void	1161	void
836	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1162	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
837	SV * oldpath	1163	ALIAS:
838	SV * newpath	1164	aio_link = EIO_LINK
839	SV * callback	1165	aio_symlink = EIO_SYMLINK
		1166	aio_rename = EIO_RENAME
840	CODE:	1167	PPCODE:
841	{	1168	{
842	dREQ;	1169	dREQ;
843		1170
844	req->type = REQ_SYMLINK;	1171	req->type = ix;
845	req->fh = newSVsv (oldpath);	1172	req->sv1 = newSVsv (oldpath);
846	req->data2ptr = SvPVbyte_nolen (req->fh);	1173	req->ptr1 = SvPVbyte_nolen (req->sv1);
847	req->data = newSVsv (newpath);	1174	req->sv2 = newSVsv (newpath);
848	req->dataptr = SvPVbyte_nolen (req->data);	1175	req->ptr2 = SvPVbyte_nolen (req->sv2);
849		1176
850	send_req (req);	1177	REQ_SEND;
851	}	1178	}
852		1179
853	void	1180	void
		1181	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1182	PPCODE:
		1183	{
		1184	dREQ;
		1185
		1186	req->type = EIO_MKNOD;
		1187	req->sv1 = newSVsv (pathname);
		1188	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1189	req->int2 = (mode_t)mode;
		1190	req->offs = dev;
		1191
		1192	REQ_SEND;
		1193	}
		1194
		1195	void
		1196	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1197	ALIAS:
		1198	aio_mtouch = EIO_MTOUCH
		1199	aio_msync = EIO_MSYNC
		1200	PROTOTYPE: $$$$;$
		1201	PPCODE:
		1202	{
		1203	STRLEN svlen;
		1204	UV len = SvUV (length);
		1205	char *svptr = SvPVbyte (data, svlen);
		1206
		1207	if (offset < 0)
		1208	offset += svlen;
		1209
		1210	if (offset < 0 || offset > svlen)
		1211	croak ("offset outside of scalar");
		1212
		1213	if (!SvOK (length) || len + offset > svlen)
		1214	len = svlen - offset;
		1215
		1216	{
		1217	dREQ;
		1218
		1219	req->type = ix;
		1220	req->size = len;
		1221	req->sv2 = SvREFCNT_inc (data);
		1222	req->ptr2 = (char *)svptr + offset;
		1223	req->int1 = flags;
		1224
		1225	REQ_SEND;
		1226	}
		1227	}
		1228
		1229	void
		1230	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1231	PPCODE:
		1232	{
		1233	dREQ;
		1234
		1235	req->type = EIO_BUSY;
		1236	req->nv1 = delay < 0. ? 0. : delay;
		1237
		1238	REQ_SEND;
		1239	}
		1240
		1241	void
		1242	aio_group (SV *callback=&PL_sv_undef)
		1243	PROTOTYPE: ;$
		1244	PPCODE:
		1245	{
		1246	dREQ;
		1247
		1248	req->type = EIO_GROUP;
		1249
		1250	req_submit (req);
		1251	XPUSHs (req_sv (req, aio_grp_stash));
		1252	}
		1253
		1254	void
		1255	aio_nop (SV *callback=&PL_sv_undef)
		1256	ALIAS:
		1257	aio_nop = EIO_NOP
		1258	aio_sync = EIO_SYNC
		1259	PPCODE:
		1260	{
		1261	dREQ;
		1262
		1263	req->type = ix;
		1264
		1265	REQ_SEND;
		1266	}
		1267
		1268	int
		1269	aioreq_pri (int pri = 0)
		1270	PROTOTYPE: ;$
		1271	CODE:
		1272	RETVAL = next_pri;
		1273	if (items > 0)
		1274	{
		1275	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1276	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1277	next_pri = pri;
		1278	}
		1279	OUTPUT:
		1280	RETVAL
		1281
		1282	void
		1283	aioreq_nice (int nice = 0)
		1284	CODE:
		1285	nice = next_pri - nice;
		1286	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1287	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1288	next_pri = nice;
		1289
		1290	void
854	flush()	1291	flush ()
855	PROTOTYPE:	1292	PROTOTYPE:
856	CODE:	1293	CODE:
857	while (nreqs)	1294	while (eio_nreqs ())
858	{	1295	{
859	poll_wait ();	1296	poll_wait ();
860	poll_cb ();	1297	poll_cb ();
861	}	1298	}
862		1299
863	void	1300	int
864	poll()	1301	poll()
865	PROTOTYPE:	1302	PROTOTYPE:
866	CODE:	1303	CODE:
867	if (nreqs)
868	{
869	poll_wait ();	1304	poll_wait ();
870	poll_cb ();	1305	RETVAL = poll_cb ();
871	}	1306	OUTPUT:
		1307	RETVAL
872		1308
873	int	1309	int
874	poll_fileno()	1310	poll_fileno()
875	PROTOTYPE:	1311	PROTOTYPE:
876	CODE:	1312	CODE:
877	RETVAL = respipe [0];	1313	RETVAL = s_epipe_fd (&respipe);
878	OUTPUT:	1314	OUTPUT:
879	RETVAL	1315	RETVAL
880		1316
881	int	1317	int
882	poll_cb(...)	1318	poll_cb(...)
…		…
888		1324
889	void	1325	void
890	poll_wait()	1326	poll_wait()
891	PROTOTYPE:	1327	PROTOTYPE:
892	CODE:	1328	CODE:
893	if (nreqs)
894	poll_wait ();	1329	poll_wait ();
895		1330
896	int	1331	int
897	nreqs()	1332	nreqs()
898	PROTOTYPE:	1333	PROTOTYPE:
899	CODE:	1334	CODE:
900	RETVAL = nreqs;	1335	RETVAL = eio_nreqs ();
901	OUTPUT:	1336	OUTPUT:
902	RETVAL	1337	RETVAL
903		1338
		1339	int
		1340	nready()
		1341	PROTOTYPE:
		1342	CODE:
		1343	RETVAL = eio_nready ();
		1344	OUTPUT:
		1345	RETVAL
		1346
		1347	int
		1348	npending()
		1349	PROTOTYPE:
		1350	CODE:
		1351	RETVAL = eio_npending ();
		1352	OUTPUT:
		1353	RETVAL
		1354
		1355	int
		1356	nthreads()
		1357	PROTOTYPE:
		1358	CODE:
		1359	RETVAL = eio_nthreads ();
		1360	OUTPUT:
		1361	RETVAL
		1362
		1363	int
		1364	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1365	PROTOTYPE: $$$$
		1366	CODE:
		1367	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1368	RETVAL = posix_fadvise (fh, offset, length, advice);
		1369	#else
		1370	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1371	#endif
		1372	OUTPUT:
		1373	RETVAL
		1374
		1375	ssize_t
		1376	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1377	PROTOTYPE: $$$$
		1378	CODE:
		1379	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1380	OUTPUT:
		1381	RETVAL
		1382
		1383	void
		1384	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1385	PROTOTYPE: $$$$$;$
		1386	PPCODE:
		1387	sv_unmagic (scalar, MMAP_MAGIC);
		1388	{
		1389	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1390	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1391	if (addr == (void *)-1)
		1392	XSRETURN_NO;
		1393
		1394	sv_force_normal (scalar);
		1395
		1396	/* we store the length in mg_obj, as namlen is I32 :/ */
		1397	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1398	->mg_obj = (SV *)length;
		1399
		1400	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1401
		1402	if (!(prot & PROT_WRITE))
		1403	SvREADONLY_on (scalar);
		1404
		1405	if (SvLEN (scalar))
		1406	Safefree (SvPVX (scalar));
		1407
		1408	SvPVX (scalar) = (char *)addr;
		1409	SvCUR_set (scalar, length);
		1410	SvLEN_set (scalar, 0);
		1411	SvPOK_only (scalar);
		1412
		1413	XSRETURN_YES;
		1414	}
		1415
		1416	void
		1417	munmap (SV *scalar)
		1418	PROTOTYPE: $
		1419	CODE:
		1420	sv_unmagic (scalar, MMAP_MAGIC);
		1421
		1422	int
		1423	mlockall (int flags)
		1424	PROTOTYPE: $
		1425	CODE:
		1426	#if _POSIX_MEMLOCK
		1427	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1428	extern int mallopt (int, int);
		1429	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1430	#endif
		1431	mlockall (flags);
		1432	#else
		1433	RETVAL = -1;
		1434	errno = ENOSYS;
		1435	#endif
		1436	OUTPUT:
		1437	RETVAL
		1438
		1439	int
		1440	munlockall ()
		1441	PROTOTYPE:
		1442	CODE:
		1443	#if _POSIX_MEMLOCK
		1444	munlockall ();
		1445	#else
		1446	RETVAL = -1;
		1447	errno = ENOSYS;
		1448	#endif
		1449	OUTPUT:
		1450	RETVAL
		1451
		1452	void _on_next_submit (SV *cb)
		1453	CODE:
		1454	SvREFCNT_dec (on_next_submit);
		1455	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1456
		1457	PROTOTYPES: DISABLE
		1458
		1459	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1460
		1461	void
		1462	cancel (aio_req_ornot req)
		1463	CODE:
		1464	eio_cancel (req);
		1465
		1466	void
		1467	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1468	PPCODE:
		1469	{
		1470	if (GIMME_V != G_VOID)
		1471	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1472
		1473	if (items > 1)
		1474	{
		1475	SV *cb_cv =get_cb (callback);
		1476
		1477	SvREFCNT_dec (req->callback);
		1478	req->callback = SvREFCNT_inc (cb_cv);
		1479	}
		1480	}
		1481
		1482	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1483
		1484	void
		1485	add (aio_req grp, ...)
		1486	PPCODE:
		1487	{
		1488	int i;
		1489
		1490	if (grp->int1 == 2)
		1491	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1492
		1493	for (i = 1; i < items; ++i )
		1494	{
		1495	aio_req req;
		1496
		1497	if (GIMME_V != G_VOID)
		1498	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1499
		1500	req = SvAIO_REQ (ST (i));
		1501
		1502	if (req)
		1503	eio_grp_add (grp, req);
		1504	}
		1505	}
		1506
		1507	void
		1508	cancel_subs (aio_req_ornot req)
		1509	CODE:
		1510	req_cancel_subs (req);
		1511
		1512	void
		1513	result (aio_req grp, ...)
		1514	CODE:
		1515	{
		1516	int i;
		1517	AV *av;
		1518
		1519	grp->errorno = errno;
		1520
		1521	av = newAV ();
		1522	av_extend (av, items - 1);
		1523
		1524	for (i = 1; i < items; ++i )
		1525	av_push (av, newSVsv (ST (i)));
		1526
		1527	SvREFCNT_dec (grp->sv1);
		1528	grp->sv1 = (SV *)av;
		1529	}
		1530
		1531	void
		1532	errno (aio_req grp, int errorno = errno)
		1533	CODE:
		1534	grp->errorno = errorno;
		1535
		1536	void
		1537	limit (aio_req grp, int limit)
		1538	CODE:
		1539	eio_grp_limit (grp, limit);
		1540
		1541	void
		1542	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1543	CODE:
		1544	{
		1545	SvREFCNT_dec (grp->sv2);
		1546	grp->sv2 = newSVsv (callback);
		1547	grp->feed = aio_grp_feed;
		1548
		1549	if (grp->int2 <= 0)
		1550	grp->int2 = 2;
		1551
		1552	eio_grp_limit (grp, grp->int2);
		1553	}
		1554

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