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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.12 by root, Wed Jul 20 21:57:04 2005 UTC vs.
Revision 1.187 by root, Sat Jul 16 16:46:10 2011 UTC

1	#define _XOPEN_SOURCE 500	1	#include "libeio/xthread.h"
		2
		3	#include <errno.h>
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
		9	#include "schmorp.h"
		10
		11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
7	#include <sys/types.h>	14	#include <sys/types.h>
8	#include <sys/stat.h>	15	#include <sys/stat.h>
9
10	#include <unistd.h>	16	#include <limits.h>
11	#include <fcntl.h>	17	#include <fcntl.h>
12	#include <signal.h>
13	#include <sched.h>	18	#include <sched.h>
14	#if __linux	19
		20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
15	#include <sys/syscall.h>	21	# include <sys/mman.h>
16	#endif	22	#endif
17		23
18	#include <pthread.h>	24	/* perl namespace pollution */
		25	#undef VERSION
19		26
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	27	/* perl stupidly overrides readdir and maybe others */
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	28	/* with thread-unsafe versions, imagine that :( */
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	29	#undef readdir
		30	#undef opendir
		31	#undef closedir
23		32
24	#if __ia64	33	#ifdef _WIN32
25	# define STACKSIZE 65536	34
		35	# define EIO_STRUCT_DIRENT Direntry_t
		36	# undef malloc
		37	# undef free
		38
		39	// perl overrides all those nice win32 functions
		40	# undef open
		41	# undef read
		42	# undef write
		43	# undef send
		44	# undef recv
		45	# undef lstat
		46	# undef truncate
		47	# undef ftruncate
		48	# undef open
		49	# undef link
		50	# undef close
		51	# undef unlink
		52	# undef mkdir
		53	# undef rmdir
		54	# undef rename
		55	# undef lseek
		56	# undef opendir
		57	# undef readdir
		58	# undef closedir
		59	# undef chmod
		60	# undef fchmod
		61
		62	# define opendir(fd) EIO_ERRNO (ENOSYS, 0)
		63	# define readdir(fd) EIO_ENOSYS ()
		64	# define closedir(fd) EIO_ENOSYS ()
		65
26	#else	66	#else
27	# define STACKSIZE 4096	67
		68	# include <sys/time.h>
		69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73
		74	#endif
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define VAL64 IV
		81	# define SvVAL64 SvIV
		82	# define newSVval64 newSViv
		83	#else
		84	# define VAL64 NV
		85	# define SvVAL64 SvNV
		86	# define newSVval64 newSVnv
		87	#endif
		88
		89	/*****************************************************************************/
		90
		91	#if __GNUC__ >= 3
		92	# define expect(expr,value) __builtin_expect ((expr),(value))
		93	#else
		94	# define expect(expr,value) (expr)
		95	#endif
		96
		97	#define expect_false(expr) expect ((expr) != 0, 0)
		98	#define expect_true(expr) expect ((expr) != 0, 1)
		99
		100	/*****************************************************************************/
		101
		102	typedef SV SV8; /* byte-sv, used for argument-checking */
		103	typedef int aio_rfd; /* read file desriptor */
		104	typedef int aio_wfd; /* write file descriptor */
		105
		106	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		107
		108	#define EIO_REQ_MEMBERS \
		109	SV *callback; \
		110	SV *sv1, *sv2; \
		111	STRLEN stroffset; \
		112	SV *self;
		113
		114	#define EIO_NO_WRAPPERS 1
		115
		116	#include "libeio/config.h"
		117	#include "libeio/eio.h"
		118
		119	/* Linux/others */
		120	#ifndef O_ASYNC
		121	# define O_ASYNC 0
		122	#endif
		123	#ifndef O_DIRECT
		124	# define O_DIRECT 0
		125	#endif
		126	#ifndef O_NOATIME
		127	# define O_NOATIME 0
		128	#endif
		129
		130	/* POSIX */
		131	#ifndef O_CLOEXEC
		132	# define O_CLOEXEC 0
		133	#endif
		134	#ifndef O_NOFOLLOW
		135	# define O_NOFOLLOW 0
		136	#endif
		137	#ifndef O_NOCTTY
		138	# define O_NOCTTY 0
		139	#endif
		140	#ifndef O_NONBLOCK
		141	# define O_NONBLOCK 0
		142	#endif
		143	#ifndef O_EXEC
		144	# define O_EXEC 0
		145	#endif
		146	#ifndef O_SEARCH
		147	# define O_SEARCH 0
		148	#endif
		149	#ifndef O_DIRECTORY
		150	# define O_DIRECTORY 0
		151	#endif
		152	#ifndef O_DSYNC
		153	# define O_DSYNC 0
		154	#endif
		155	#ifndef O_RSYNC
		156	# define O_RSYNC 0
		157	#endif
		158	#ifndef O_SYNC
		159	# define O_SYNC 0
		160	#endif
		161	#ifndef O_TTY_INIT
		162	# define O_TTY_INIT 0
		163	#endif
		164
		165	#ifndef POSIX_FADV_NORMAL
		166	# define POSIX_FADV_NORMAL 0
		167	#endif
		168	#ifndef POSIX_FADV_SEQUENTIAL
		169	# define POSIX_FADV_SEQUENTIAL 0
		170	#endif
		171	#ifndef POSIX_FADV_RANDOM
		172	# define POSIX_FADV_RANDOM 0
		173	#endif
		174	#ifndef POSIX_FADV_NOREUSE
		175	# define POSIX_FADV_NOREUSE 0
		176	#endif
		177	#ifndef POSIX_FADV_WILLNEED
		178	# define POSIX_FADV_WILLNEED 0
		179	#endif
		180	#ifndef POSIX_FADV_DONTNEED
		181	# define POSIX_FADV_DONTNEED 0
		182	#endif
		183
		184	#if !HAVE_POSIX_FADVISE
		185	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		186	#endif
		187
		188	#ifndef POSIX_MADV_NORMAL
		189	# define POSIX_MADV_NORMAL 0
		190	#endif
		191	#ifndef POSIX_MADV_SEQUENTIAL
		192	# define POSIX_MADV_SEQUENTIAL 0
		193	#endif
		194	#ifndef POSIX_MADV_RANDOM
		195	# define POSIX_MADV_RANDOM 0
		196	#endif
		197	#ifndef POSIX_MADV_WILLNEED
		198	# define POSIX_MADV_WILLNEED 0
		199	#endif
		200	#ifndef POSIX_MADV_DONTNEED
		201	# define POSIX_MADV_DONTNEED 0
		202	#endif
		203
		204	#if !HAVE_POSIX_MADVISE
		205	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		206	#endif
		207
		208	#ifndef PROT_NONE
		209	# define PROT_NONE 0
		210	#endif
		211	#ifndef PROT_READ
		212	# define PROT_READ 0
		213	#endif
		214	#ifndef PROT_WRITE
		215	# define PROT_READ 0
		216	#endif
		217	#ifndef PROT_EXEC
		218	# define PROT_EXEC 0
		219	#endif
		220
		221	#ifndef ST_RDONLY
		222	# define ST_RDONLY 0
		223	#endif
		224	#ifndef ST_NOSUID
		225	# define ST_NOSUID 0
		226	#endif
		227	#ifndef ST_NODEV
		228	# define ST_NODEV 0
		229	#endif
		230	#ifndef ST_NOEXEC
		231	# define ST_NOEXEC 0
		232	#endif
		233	#ifndef ST_SYNCHRONOUS
		234	# define ST_SYNCHRONOUS 0
		235	#endif
		236	#ifndef ST_MANDLOCK
		237	# define ST_MANDLOCK 0
		238	#endif
		239	#ifndef ST_WRITE
		240	# define ST_WRITE 0
		241	#endif
		242	#ifndef ST_APPEND
		243	# define ST_APPEND 0
		244	#endif
		245	#ifndef ST_IMMUTABLE
		246	# define ST_IMMUTABLE 0
		247	#endif
		248	#ifndef ST_NOATIME
		249	# define ST_NOATIME 0
		250	#endif
		251	#ifndef ST_NODIRATIME
		252	# define ST_NODIRATIME 0
		253	#endif
		254	#ifndef ST_RELATIME
		255	# define ST_RELATIME 0
		256	#endif
		257
		258	#ifndef S_IFIFO
		259	# define S_IFIFO 0
		260	#endif
		261	#ifndef S_IFCHR
		262	# define S_IFCHR 0
		263	#endif
		264	#ifndef S_IFBLK
		265	# define S_IFBLK 0
		266	#endif
		267	#ifndef S_IFLNK
		268	# define S_IFLNK 0
		269	#endif
		270	#ifndef S_IFREG
		271	# define S_IFREG 0
		272	#endif
		273	#ifndef S_IFDIR
		274	# define S_IFDIR 0
		275	#endif
		276	#ifndef S_IFWHT
		277	# define S_IFWHT 0
		278	#endif
		279	#ifndef S_IFSOCK
		280	# define S_IFSOCK 0
		281	#endif
		282
		283	#ifndef MAP_ANONYMOUS
		284	# ifdef MAP_ANON
		285	# define MAP_ANONYMOUS MAP_ANON
		286	# else
		287	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
28	#endif	288	# endif
		289	#endif
		290	#ifndef MAP_HUGETLB
		291	# define MAP_HUGETLB 0
		292	#endif
		293	#ifndef MAP_LOCKED
		294	# define MAP_LOCKED 0
		295	#endif
		296	#ifndef MAP_NORESERVE
		297	# define MAP_NORESERVE 0
		298	#endif
		299	#ifndef MAP_POPULATE
		300	# define MAP_POPULATE 0
		301	#endif
		302	#ifndef MAP_NONBLOCK
		303	# define MAP_NONBLOCK 0
		304	#endif
		305
		306	#ifndef makedev
		307	# define makedev(maj,min) (((maj) << 8) | (min))
		308	#endif
		309	#ifndef major
		310	# define major(dev) ((dev) >> 8)
		311	#endif
		312	#ifndef minor
		313	# define minor(dev) ((dev) & 0xff)
		314	#endif
		315
		316	#ifndef PAGESIZE
		317	# define PAGESIZE sysconf (_SC_PAGESIZE)
		318	#endif
		319
		320	static int req_invoke (eio_req *req);
		321	#define EIO_FINISH(req) req_invoke (req)
		322	static void req_destroy (eio_req *grp);
		323	#define EIO_DESTROY(req) req_destroy (req)
29		324
30	enum {	325	enum {
31	REQ_QUIT,	326	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
32	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
35	REQ_FSYNC, REQ_FDATASYNC,
36	};	327	};
37		328
38	typedef struct aio_cb {	329	#include "libeio/eio.c"
39	struct aio_cb *volatile next;
40		330
41	int type;
42
43	int fd;
44	off_t offset;
45	size_t length;
46	ssize_t result;
47	mode_t mode; /* open */
48	int errorno;
49	SV *data, *callback;
50	void *dataptr;
51	STRLEN dataoffset;
52
53	Stat_t *statdata;
54	} aio_cb;
55
56	typedef aio_cb *aio_req;	331	typedef eio_req *aio_req;
		332	typedef eio_req *aio_req_ornot;
57		333
58	static int started;	334	static SV *on_next_submit;
59	static volatile int nreqs;	335	static int next_pri = EIO_PRI_DEFAULT;
60	static int max_outstanding = 1<<30;	336	static int max_outstanding;
61	static int respipe [2];
62		337
63	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	338	static s_epipe respipe;
64	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
65	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66		339
67	static volatile aio_req reqs, reqe; /* queue start, queue end */	340	static void req_destroy (aio_req req);
68	static volatile aio_req ress, rese; /* queue start, queue end */	341	static void req_cancel (aio_req req);
69		342
70	static void	343	static void want_poll (void)
71	poll_wait ()
72	{	344	{
73	if (nreqs && !ress)	345	/* write a dummy byte to the pipe so fh becomes ready */
		346	s_epipe_signal (&respipe);
		347	}
		348
		349	static void done_poll (void)
		350	{
		351	/* read any signals sent by the worker threads */
		352	s_epipe_drain (&respipe);
		353	}
		354
		355	/* must be called at most once */
		356	static SV *req_sv (aio_req req, HV *stash)
		357	{
		358	if (!req->self)
74	{	359	{
75	fd_set rfd;	360	req->self = (SV *)newHV ();
76	FD_ZERO(&rfd);	361	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
77	FD_SET(respipe [0], &rfd);
78
79	select (respipe [0] + 1, &rfd, 0, 0, 0);
80	}	362	}
81	}
82		363
83	static int	364	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
84	poll_cb ()	365	}
85	{
86	dSP;
87	int count = 0;
88	aio_req req, prv;
89		366
90	pthread_mutex_lock (&reslock);	367	static aio_req SvAIO_REQ (SV *sv)
		368	{
		369	MAGIC *mg;
91		370
92	{	371	if (!SvROK (sv)
93	/* read any signals sent by the worker threads */	372	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
94	char buf [32];	373	&& SvSTASH (SvRV (sv)) != aio_req_stash
95	while (read (respipe [0], buf, 32) > 0)	374	&& !sv_derived_from (sv, "IO::AIO::REQ")))
96	;	375	croak ("object of class IO::AIO::REQ expected");
97	}
98		376
99	req = ress;	377	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
100	ress = rese = 0;
101		378
102	pthread_mutex_unlock (&reslock);	379	return mg ? (aio_req)mg->mg_ptr : 0;
		380	}
103		381
104	while (req)	382	static void aio_grp_feed (aio_req grp)
		383	{
		384	if (grp->sv2 && SvOK (grp->sv2))
105	{	385	{
106	nreqs--;	386	dSP;
107		387
108	if (req->type == REQ_QUIT)	388	ENTER;
109	started--;	389	SAVETMPS;
110	else	390	PUSHMARK (SP);
		391	XPUSHs (req_sv (grp, aio_grp_stash));
		392	PUTBACK;
		393	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		394	SPAGAIN;
		395	FREETMPS;
		396	LEAVE;
		397	}
		398	}
		399
		400	static void req_submit (eio_req *req)
		401	{
		402	eio_submit (req);
		403
		404	if (expect_false (on_next_submit))
		405	{
		406	dSP;
		407	SV *cb = sv_2mortal (on_next_submit);
		408
		409	on_next_submit = 0;
		410
		411	PUSHMARK (SP);
		412	PUTBACK;
		413	call_sv (cb, G_DISCARD | G_EVAL);
		414	}
		415	}
		416
		417	static int req_invoke (eio_req *req)
		418	{
		419	if (req->flags & FLAG_SV2_RO_OFF)
		420	SvREADONLY_off (req->sv2);
		421
		422	if (!EIO_CANCELLED (req) && req->callback)
		423	{
		424	dSP;
		425	static SV *sv_result_cache; /* caches the result integer SV */
		426	SV *sv_result;
		427
		428	ENTER;
		429	SAVETMPS;
		430	PUSHMARK (SP);
		431	EXTEND (SP, 1);
		432
		433	/* do not recreate the result IV from scratch each time */
		434	if (expect_true (sv_result_cache))
111	{	435	{
112	int errorno = errno;	436	sv_result = sv_result_cache; sv_result_cache = 0;
113	errno = req->errorno;	437	SvIV_set (sv_result, req->result);
114		438	SvIOK_only (sv_result);
115	if (req->type == REQ_READ)
116	SvCUR_set (req->data, req->dataoffset
117	+ req->result > 0 ? req->result : 0);
118
119	if (req->data)
120	SvREFCNT_dec (req->data);
121
122	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
123	{
124	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
125	PL_laststatval = req->result;
126	PL_statcache = *(req->statdata);
127
128	Safefree (req->statdata);
129	}
130
131	PUSHMARK (SP);
132	XPUSHs (sv_2mortal (newSViv (req->result)));
133
134	if (req->type == REQ_OPEN)
135	{
136	/* convert fd to fh */
137	SV *fh;
138
139	PUTBACK;
140	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
141	SPAGAIN;
142
143	fh = POPs;
144
145	PUSHMARK (SP);
146	XPUSHs (fh);
147	}
148
149	if (SvOK (req->callback))
150	{
151	PUTBACK;
152	call_sv (req->callback, G_VOID | G_EVAL);
153	SPAGAIN;
154	}
155
156	if (req->callback)
157	SvREFCNT_dec (req->callback);
158
159	errno = errorno;
160	count++;
161	}
162
163	prv = req;
164	req = req->next;
165	Safefree (prv);
166
167	/* TODO: croak on errors? */
168	}
169
170	return count;
171	}
172
173	static void *aio_proc(void *arg);
174
175	static void
176	start_thread (void)
177	{
178	sigset_t fullsigset, oldsigset;
179	pthread_t tid;
180	pthread_attr_t attr;
181
182	pthread_attr_init (&attr);
183	pthread_attr_setstacksize (&attr, STACKSIZE);
184	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
185
186	sigfillset (&fullsigset);
187	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
188
189	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
190	started++;
191
192	sigprocmask (SIG_SETMASK, &oldsigset, 0);
193	}
194
195	static void
196	send_req (aio_req req)
197	{
198	nreqs++;
199
200	pthread_mutex_lock (&reqlock);
201
202	req->next = 0;
203
204	if (reqe)
205	{
206	reqe->next = req;
207	reqe = req;
208	}
209	else
210	reqe = reqs = req;
211
212	pthread_cond_signal (&reqwait);
213	pthread_mutex_unlock (&reqlock);
214
215	while (nreqs > max_outstanding)
216	{
217	poll_wait ();
218	poll_cb ();
219	}
220	}
221
222	static void
223	end_thread (void)
224	{
225	aio_req req;
226	New (0, req, 1, aio_cb);
227	req->type = REQ_QUIT;
228
229	send_req (req);
230	}
231
232	static void
233	read_write (int dowrite, int fd, off_t offset, size_t length,
234	SV *data, STRLEN dataoffset, SV *callback)
235	{
236	aio_req req;
237	STRLEN svlen;
238	char *svptr = SvPV (data, svlen);
239
240	SvUPGRADE (data, SVt_PV);
241	SvPOK_on (data);
242
243	if (dataoffset < 0)
244	dataoffset += svlen;
245
246	if (dataoffset < 0 || dataoffset > svlen)
247	croak ("data offset outside of string");
248
249	if (dowrite)
250	{
251	/* write: check length and adjust. */
252	if (length < 0 || length + dataoffset > svlen)
253	length = svlen - dataoffset;
254	}
255	else
256	{
257	/* read: grow scalar as necessary */
258	svptr = SvGROW (data, length + dataoffset);
259	}
260
261	if (length < 0)
262	croak ("length must not be negative");
263
264	Newz (0, req, 1, aio_cb);
265
266	if (!req)
267	croak ("out of memory during aio_req allocation");
268
269	req->type = dowrite ? REQ_WRITE : REQ_READ;
270	req->fd = fd;
271	req->offset = offset;
272	req->length = length;
273	req->data = SvREFCNT_inc (data);
274	req->dataptr = (char *)svptr + dataoffset;
275	req->callback = SvREFCNT_inc (callback);
276
277	send_req (req);
278	}
279
280	static void *
281	aio_proc (void *thr_arg)
282	{
283	aio_req req;
284	int type;
285
286	do
287	{
288	pthread_mutex_lock (&reqlock);
289
290	for (;;)
291	{
292	req = reqs;
293
294	if (reqs)
295	{
296	reqs = reqs->next;
297	if (!reqs) reqe = 0;
298	}
299
300	if (req)
301	break;
302
303	pthread_cond_wait (&reqwait, &reqlock);
304	}
305
306	pthread_mutex_unlock (&reqlock);
307
308	errno = 0; /* strictly unnecessary */
309
310	type = req->type;
311
312	switch (type)
313	{
314	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
315	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
316	#if SYS_readahead
317	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
318	#else
319	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
320	#endif
321
322	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
323	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
324	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
325
326	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
327	case REQ_CLOSE: req->result = close (req->fd); break;
328	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
329
330	case REQ_FSYNC: req->result = fsync (req->fd); break;
331	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
332
333	case REQ_QUIT:
334	break;
335
336	default:
337	req->result = ENOSYS;
338	break;
339	}
340
341	req->errorno = errno;
342
343	pthread_mutex_lock (&reslock);
344
345	req->next = 0;
346
347	if (rese)
348	{
349	rese->next = req;
350	rese = req;
351	}	439	}
352	else	440	else
353	{	441	{
354	rese = ress = req;	442	sv_result = newSViv (req->result);
355		443	SvREADONLY_on (sv_result);
356	/* write a dummy byte to the pipe so fh becomes ready */
357	write (respipe [1], &respipe, 1);
358	}	444	}
359		445
360	pthread_mutex_unlock (&reslock);	446	switch (req->type)
		447	{
		448	case EIO_READDIR:
		449	{
		450	SV *rv = &PL_sv_undef;
		451
		452	if (req->result >= 0)
		453	{
		454	int i;
		455	char *names = (char *)req->ptr2;
		456	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		457	AV *av = newAV ();
		458
		459	av_extend (av, req->result - 1);
		460
		461	for (i = 0; i < req->result; ++i)
		462	{
		463	if (req->int1 & EIO_READDIR_DENTS)
		464	{
		465	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		466
		467	if (req->int1 & EIO_READDIR_CUSTOM2)
		468	{
		469	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		470	AV *avent = newAV ();
		471
		472	av_extend (avent, 2);
		473
		474	if (!sv_type [ent->type])
		475	{
		476	sv_type [ent->type] = newSViv (ent->type);
		477	SvREADONLY_on (sv_type [ent->type]);
		478	}
		479
		480	av_store (avent, 0, namesv);
		481	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		482	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		483
		484	av_store (av, i, newRV_noinc ((SV *)avent));
		485	}
		486	else
		487	av_store (av, i, namesv);
		488
		489	++ent;
		490	}
		491	else
		492	{
		493	SV *name = newSVpv (names, 0);
		494	av_store (av, i, name);
		495	names += SvCUR (name) + 1;
		496	}
		497	}
		498
		499	rv = sv_2mortal (newRV_noinc ((SV *)av));
		500	}
		501
		502	PUSHs (rv);
		503
		504	if (req->int1 & EIO_READDIR_CUSTOM1)
		505	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		506	}
		507	break;
		508
		509	case EIO_OPEN:
		510	{
		511	/* convert fd to fh */
		512	SV *fh = &PL_sv_undef;
		513
		514	if (req->result >= 0)
		515	{
		516	GV *gv = (GV *)sv_newmortal ();
		517	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		518	char sym [64];
		519	int symlen;
		520
		521	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		522	gv_init (gv, aio_stash, sym, symlen, 0);
		523
		524	symlen = snprintf (
		525	sym,
		526	sizeof (sym),
		527	"%s&=%d",
		528	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		529	(int)req->result
		530	);
		531
		532	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		533	fh = (SV *)gv;
		534	}
		535
		536	PUSHs (fh);
		537	}
		538	break;
		539
		540	case EIO_STATVFS:
		541	case EIO_FSTATVFS:
		542	{
		543	SV *rv = &PL_sv_undef;
		544
		545	#ifndef _WIN32
		546	if (req->result >= 0)
		547	{
		548	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		549	HV *hv = newHV ();
		550
		551	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		552
		553	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		554	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		555	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		556	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		557	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		558	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		559	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		560	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		561	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		562	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		563	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		564	}
		565	#endif
		566
		567	PUSHs (rv);
		568	}
		569
		570	break;
		571
		572	case EIO_GROUP:
		573	req->int1 = 2; /* mark group as finished */
		574
		575	if (req->sv1)
		576	{
		577	int i;
		578	AV *av = (AV *)req->sv1;
		579
		580	EXTEND (SP, AvFILL (av) + 1);
		581	for (i = 0; i <= AvFILL (av); ++i)
		582	PUSHs (*av_fetch (av, i, 0));
		583	}
		584	break;
		585
		586	case EIO_NOP:
		587	case EIO_BUSY:
		588	break;
		589
		590	case EIO_READLINK:
		591	case EIO_REALPATH:
		592	if (req->result > 0)
		593	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		594	break;
		595
		596	case EIO_STAT:
		597	case EIO_LSTAT:
		598	case EIO_FSTAT:
		599	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		600	PL_laststatval = req->result;
		601	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		602	PUSHs (sv_result);
		603	break;
		604
		605	case EIO_READ:
		606	{
		607	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		608	*SvEND (req->sv2) = 0;
		609	SvPOK_only (req->sv2);
		610	SvSETMAGIC (req->sv2);
		611	PUSHs (sv_result);
		612	}
		613	break;
		614
		615	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		616	if (req->result > 0)
		617	SvIV_set (sv_result, 0);
		618	/* FALLTHROUGH */
		619
		620	default:
		621	PUSHs (sv_result);
		622	break;
		623	}
		624
		625	errno = req->errorno;
		626
		627	PUTBACK;
		628	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		629	SPAGAIN;
		630
		631	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		632	SvREFCNT_dec (sv_result);
		633	else
		634	sv_result_cache = sv_result;
		635
		636	FREETMPS;
		637	LEAVE;
		638
		639	PUTBACK;
361	}	640	}
362	while (type != REQ_QUIT);	641
		642	return !!SvTRUE (ERRSV);
		643	}
		644
		645	static void req_destroy (aio_req req)
		646	{
		647	if (req->self)
		648	{
		649	sv_unmagic (req->self, PERL_MAGIC_ext);
		650	SvREFCNT_dec (req->self);
		651	}
		652
		653	SvREFCNT_dec (req->sv1);
		654	SvREFCNT_dec (req->sv2);
		655	SvREFCNT_dec (req->callback);
		656
		657	Safefree (req);
		658	}
		659
		660	static void req_cancel_subs (aio_req grp)
		661	{
		662	aio_req sub;
		663
		664	if (grp->type != EIO_GROUP)
		665	return;
		666
		667	SvREFCNT_dec (grp->sv2);
		668	grp->sv2 = 0;
		669
		670	eio_grp_cancel (grp);
		671	}
		672
		673	static void create_respipe (void)
		674	{
		675	if (s_epipe_renew (&respipe))
		676	croak ("IO::AIO: unable to initialize result pipe");
		677	}
		678
		679	static void poll_wait (void)
		680	{
		681	while (eio_nreqs ())
		682	{
		683	int size;
		684
		685	X_LOCK (reslock);
		686	size = res_queue.size;
		687	X_UNLOCK (reslock);
		688
		689	if (size)
		690	return;
		691
		692	etp_maybe_start_thread ();
		693
		694	s_epipe_wait (&respipe);
		695	}
		696	}
		697
		698	static int poll_cb (void)
		699	{
		700	for (;;)
		701	{
		702	int res = eio_poll ();
		703
		704	if (res > 0)
		705	croak (0);
		706
		707	if (!max_outstanding || max_outstanding > eio_nreqs ())
		708	return res;
		709
		710	poll_wait ();
		711	}
		712	}
		713
		714	static void atfork_child (void)
		715	{
		716	create_respipe ();
		717	}
		718
		719	/*****************************************************************************/
		720
		721	#if !_POSIX_MAPPED_FILES
		722	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		723	# define munmap(addr,length) (errno = ENOSYS, -1)
		724	#endif
		725
		726	#if !_POSIX_MEMORY_PROTECTION
		727	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		728	# define PROT_NONE 0
		729	# define PROT_WRITE 0
		730	# define MAP_PRIVATE 0
		731	# define MAP_SHARED 0
		732	# define MAP_FIXED 0
		733	#endif
		734
		735	#define MMAP_MAGIC PERL_MAGIC_ext
		736
		737	static int mmap_free (pTHX_ SV *sv, MAGIC *mg)
		738	{
		739	int old_errno = errno;
		740	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		741	errno = old_errno;
		742
		743	mg->mg_obj = 0; /* just in case */
		744
		745	SvREADONLY_off (sv);
		746
		747	if (SvPVX (sv) != mg->mg_ptr)
		748	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		749
		750	SvCUR_set (sv, 0);
		751	SvPVX (sv) = 0;
		752	SvOK_off (sv);
363		753
364	return 0;	754	return 0;
365	}	755	}
366		756
		757	static MGVTBL mmap_vtbl = {
		758	0, 0, 0, 0, mmap_free
		759	};
		760
		761	/*****************************************************************************/
		762
		763	static SV * get_cb (SV *cb_sv)
		764	{
		765	SvGETMAGIC (cb_sv);
		766	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		767	}
		768
		769	#define dREQ \
		770	SV *cb_cv; \
		771	aio_req req; \
		772	int req_pri = next_pri; \
		773	next_pri = EIO_PRI_DEFAULT; \
		774	\
		775	cb_cv = get_cb (callback); \
		776	\
		777	Newz (0, req, 1, eio_req); \
		778	if (!req) \
		779	croak ("out of memory during eio_req allocation"); \
		780	\
		781	req->callback = SvREFCNT_inc (cb_cv); \
		782	req->pri = req_pri
		783
		784	#define REQ_SEND \
		785	PUTBACK; \
		786	req_submit (req); \
		787	SPAGAIN; \
		788	\
		789	if (GIMME_V != G_VOID) \
		790	XPUSHs (req_sv (req, aio_req_stash));
		791
367	MODULE = IO::AIO PACKAGE = IO::AIO	792	MODULE = IO::AIO PACKAGE = IO::AIO
368		793
369	PROTOTYPES: ENABLE	794	PROTOTYPES: ENABLE
370		795
371	BOOT:	796	BOOT:
372	{	797	{
373	if (pipe (respipe))	798	static const struct {
374	croak ("unable to initialize result pipe");	799	const char *name;
		800	IV iv;
		801	} *civ, const_iv[] = {
		802	# define const_niv(name, value) { # name, (IV) value },
		803	# define const_iv(name) { # name, (IV) name },
		804	# define const_eio(name) { # name, (IV) EIO_ ## name },
		805	const_iv (EXDEV)
		806	const_iv (ENOSYS)
		807	const_iv (O_RDONLY)
		808	const_iv (O_WRONLY)
		809	const_iv (O_RDWR)
		810	const_iv (O_CREAT)
		811	const_iv (O_TRUNC)
		812	const_iv (O_EXCL)
		813	const_iv (O_APPEND)
375		814
376	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	815	const_iv (O_ASYNC)
377	croak ("cannot set result pipe to nonblocking mode");	816	const_iv (O_DIRECT)
		817	const_iv (O_NOATIME)
378		818
379	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	819	const_iv (O_CLOEXEC)
380	croak ("cannot set result pipe to nonblocking mode");	820	const_iv (O_NOCTTY)
381	}	821	const_iv (O_NOFOLLOW)
		822	const_iv (O_NONBLOCK)
		823	const_iv (O_EXEC)
		824	const_iv (O_SEARCH)
		825	const_iv (O_DIRECTORY)
		826	const_iv (O_DSYNC)
		827	const_iv (O_RSYNC)
		828	const_iv (O_SYNC)
		829	const_iv (O_TTY_INIT)
382		830
		831	const_iv (S_IFIFO)
		832	const_iv (S_IFCHR)
		833	const_iv (S_IFBLK)
		834	const_iv (S_IFLNK)
		835	const_iv (S_IFREG)
		836	const_iv (S_IFDIR)
		837	const_iv (S_IFWHT)
		838	const_iv (S_IFSOCK)
		839	const_iv (S_IFMT)
		840
		841	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		842	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		843	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		844	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		845	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		846	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		847
		848	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		849	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		850	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		851	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		852	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		853
		854	const_iv (ST_RDONLY)
		855	const_iv (ST_NOSUID)
		856	const_iv (ST_NODEV)
		857	const_iv (ST_NOEXEC)
		858	const_iv (ST_SYNCHRONOUS)
		859	const_iv (ST_MANDLOCK)
		860	const_iv (ST_WRITE)
		861	const_iv (ST_APPEND)
		862	const_iv (ST_IMMUTABLE)
		863	const_iv (ST_NOATIME)
		864	const_iv (ST_NODIRATIME)
		865	const_iv (ST_RELATIME)
		866
		867	const_iv (PROT_NONE)
		868	const_iv (PROT_EXEC)
		869	const_iv (PROT_READ)
		870	const_iv (PROT_WRITE)
		871
		872	/*const_iv (MAP_FIXED)*/
		873	const_iv (MAP_PRIVATE)
		874	const_iv (MAP_SHARED)
		875	const_iv (MAP_ANONYMOUS)
		876
		877	/* linuxish */
		878	const_iv (MAP_HUGETLB)
		879	const_iv (MAP_LOCKED)
		880	const_iv (MAP_NORESERVE)
		881	const_iv (MAP_POPULATE)
		882	const_iv (MAP_NONBLOCK)
		883
		884	const_eio (MCL_FUTURE)
		885	const_eio (MCL_CURRENT)
		886
		887	const_eio (MS_ASYNC)
		888	const_eio (MS_INVALIDATE)
		889	const_eio (MS_SYNC)
		890
		891	const_eio (MT_MODIFY)
		892
		893	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		894	const_eio (SYNC_FILE_RANGE_WRITE)
		895	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		896
		897	const_eio (FALLOC_FL_KEEP_SIZE)
		898
		899	const_eio (READDIR_DENTS)
		900	const_eio (READDIR_DIRS_FIRST)
		901	const_eio (READDIR_STAT_ORDER)
		902	const_eio (READDIR_FOUND_UNKNOWN)
		903
		904	const_eio (DT_UNKNOWN)
		905	const_eio (DT_FIFO)
		906	const_eio (DT_CHR)
		907	const_eio (DT_DIR)
		908	const_eio (DT_BLK)
		909	const_eio (DT_REG)
		910	const_eio (DT_LNK)
		911	const_eio (DT_SOCK)
		912	const_eio (DT_WHT)
		913	};
		914
		915	aio_stash = gv_stashpv ("IO::AIO" , 1);
		916	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		917	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		918
		919	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		920	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		921
		922	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		923
		924	create_respipe ();
		925
		926	if (eio_init (want_poll, done_poll) < 0)
		927	croak ("IO::AIO: unable to initialise eio library");
		928
		929	/* atfork child called in fifo order, so before eio's handler */
		930	X_THREAD_ATFORK (0, 0, atfork_child);
		931	}
		932
383	void	933	void
384	min_parallel(nthreads)	934	max_poll_reqs (unsigned int nreqs)
385	int nthreads
386	PROTOTYPE: $	935	PROTOTYPE: $
387	CODE:	936	CODE:
388	while (nthreads > started)	937	eio_set_max_poll_reqs (nreqs);
389	start_thread ();
390		938
391	void	939	void
392	max_parallel(nthreads)	940	max_poll_time (double nseconds)
393	int nthreads
394	PROTOTYPE: $	941	PROTOTYPE: $
395	CODE:	942	CODE:
		943	eio_set_max_poll_time (nseconds);
		944
		945	void
		946	min_parallel (unsigned int nthreads)
		947	PROTOTYPE: $
		948	CODE:
		949	eio_set_min_parallel (nthreads);
		950
		951	void
		952	max_parallel (unsigned int nthreads)
		953	PROTOTYPE: $
		954	CODE:
		955	eio_set_max_parallel (nthreads);
		956
		957	void
		958	max_idle (unsigned int nthreads)
		959	PROTOTYPE: $
		960	CODE:
		961	eio_set_max_idle (nthreads);
		962
		963	void
		964	idle_timeout (unsigned int seconds)
		965	PROTOTYPE: $
		966	CODE:
		967	eio_set_idle_timeout (seconds);
		968
		969	void
		970	max_outstanding (unsigned int maxreqs)
		971	PROTOTYPE: $
		972	CODE:
		973	max_outstanding = maxreqs;
		974
		975	void
		976	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		977	PPCODE:
396	{	978	{
397	int cur = started;	979	dREQ;
398	while (cur > nthreads)	980
399	{	981	req->type = EIO_OPEN;
400	end_thread ();	982	req->sv1 = newSVsv (pathname);
401	cur--;	983	req->ptr1 = SvPVbyte_nolen (req->sv1);
		984	req->int1 = flags;
		985	req->int2 = mode;
		986
		987	REQ_SEND;
		988	}
		989
		990	void
		991	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		992	ALIAS:
		993	aio_fsync = EIO_FSYNC
		994	aio_fdatasync = EIO_FDATASYNC
		995	PPCODE:
		996	{
		997	int fd = s_fileno_croak (fh, 0);
		998	dREQ;
		999
		1000	req->type = ix;
		1001	req->sv1 = newSVsv (fh);
		1002	req->int1 = fd;
		1003
		1004	REQ_SEND (req);
		1005	}
		1006
		1007	void
		1008	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1009	PPCODE:
		1010	{
		1011	int fd = s_fileno_croak (fh, 0);
		1012	dREQ;
		1013
		1014	req->type = EIO_SYNC_FILE_RANGE;
		1015	req->sv1 = newSVsv (fh);
		1016	req->int1 = fd;
		1017	req->offs = offset;
		1018	req->size = nbytes;
		1019	req->int2 = flags;
		1020
		1021	REQ_SEND (req);
		1022	}
		1023
		1024	void
		1025	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1026	PPCODE:
		1027	{
		1028	int fd = s_fileno_croak (fh, 0);
		1029	dREQ;
		1030
		1031	req->type = EIO_FALLOCATE;
		1032	req->sv1 = newSVsv (fh);
		1033	req->int1 = fd;
		1034	req->int2 = mode;
		1035	req->offs = offset;
		1036	req->size = len;
		1037
		1038	REQ_SEND (req);
		1039	}
		1040
		1041	void
		1042	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1043	PPCODE:
		1044	{
		1045	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1046	int fd = s_fileno_croak (fh, 0);
		1047	dREQ;
		1048
		1049	if (expect_false (close_fd < 0))
		1050	{
		1051	#ifdef _WIN32
		1052	close_fd = _open_osfhandle (socket (AF_INET, SOCK_STREAM, 0), 0);
		1053	#else
		1054	int pipefd [2];
		1055
		1056	if (pipe (pipefd) < 0
		1057	|| close (pipefd [1]) < 0
		1058	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		1059	abort (); /*D*/
		1060
		1061	close_fd = pipefd [0];
		1062	#endif
402	}	1063	}
403		1064
404	while (started > nthreads)	1065	req->type = EIO_DUP2;
		1066	req->int1 = close_fd;
		1067	req->sv2 = newSVsv (fh);
		1068	req->int2 = fd;
		1069
		1070	REQ_SEND (req);
		1071	}
		1072
		1073	void
		1074	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		1075	ALIAS:
		1076	aio_read = EIO_READ
		1077	aio_write = EIO_WRITE
		1078	PPCODE:
		1079	{
		1080	STRLEN svlen;
		1081	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		1082	char *svptr = SvPVbyte (data, svlen);
		1083	UV len = SvUV (length);
		1084
		1085	if (dataoffset < 0)
		1086	dataoffset += svlen;
		1087
		1088	if (dataoffset < 0 || dataoffset > svlen)
		1089	croak ("dataoffset outside of data scalar");
		1090
		1091	if (ix == EIO_WRITE)
		1092	{
		1093	/* write: check length and adjust. */
		1094	if (!SvOK (length) || len + dataoffset > svlen)
		1095	len = svlen - dataoffset;
		1096	}
		1097	else
		1098	{
		1099	/* read: check type and grow scalar as necessary */
		1100	SvUPGRADE (data, SVt_PV);
		1101	svptr = SvGROW (data, len + dataoffset + 1);
		1102	}
		1103
		1104	{
		1105	dREQ;
		1106
		1107	req->type = ix;
		1108	req->sv1 = newSVsv (fh);
		1109	req->int1 = fd;
		1110	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1111	req->size = len;
		1112	req->sv2 = SvREFCNT_inc (data);
		1113	req->ptr2 = (char *)svptr + dataoffset;
		1114	req->stroffset = dataoffset;
		1115
		1116	if (!SvREADONLY (data))
		1117	{
		1118	SvREADONLY_on (data);
		1119	req->flags |= FLAG_SV2_RO_OFF;
		1120	}
		1121
		1122	REQ_SEND;
		1123	}
		1124	}
		1125
		1126	void
		1127	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		1128	ALIAS:
		1129	aio_readlink = EIO_READLINK
		1130	aio_realpath = EIO_REALPATH
		1131	PPCODE:
		1132	{
		1133	SV *data;
		1134	dREQ;
		1135
		1136	req->type = ix;
		1137	req->sv1 = newSVsv (path);
		1138	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1139
		1140	REQ_SEND;
		1141	}
		1142
		1143	void
		1144	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1145	PPCODE:
		1146	{
		1147	int ifd = s_fileno_croak (in_fh , 0);
		1148	int ofd = s_fileno_croak (out_fh, 1);
		1149	dREQ;
		1150
		1151	req->type = EIO_SENDFILE;
		1152	req->sv1 = newSVsv (out_fh);
		1153	req->int1 = ofd;
		1154	req->sv2 = newSVsv (in_fh);
		1155	req->int2 = ifd;
		1156	req->offs = in_offset;
		1157	req->size = length;
		1158
		1159	REQ_SEND;
		1160	}
		1161
		1162	void
		1163	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		1164	PPCODE:
		1165	{
		1166	int fd = s_fileno_croak (fh, 0);
		1167	dREQ;
		1168
		1169	req->type = EIO_READAHEAD;
		1170	req->sv1 = newSVsv (fh);
		1171	req->int1 = fd;
		1172	req->offs = offset;
		1173	req->size = length;
		1174
		1175	REQ_SEND;
		1176	}
		1177
		1178	void
		1179	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		1180	ALIAS:
		1181	aio_stat = EIO_STAT
		1182	aio_lstat = EIO_LSTAT
		1183	aio_statvfs = EIO_STATVFS
		1184	PPCODE:
		1185	{
		1186	dREQ;
		1187
		1188	req->sv1 = newSVsv (fh_or_path);
		1189
		1190	if (SvPOK (req->sv1))
		1191	{
		1192	req->type = ix;
		1193	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1194	}
		1195	else
		1196	{
		1197	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
		1198	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1199	}
		1200
		1201	REQ_SEND;
		1202	}
		1203
		1204	UV
		1205	major (UV dev)
		1206	ALIAS:
		1207	minor = 1
		1208	CODE:
		1209	RETVAL = ix ? major (dev) : minor (dev);
		1210	OUTPUT:
		1211	RETVAL
		1212
		1213	UV
		1214	makedev (UV maj, UV min)
		1215	CODE:
		1216	RETVAL = makedev (maj, min);
		1217	OUTPUT:
		1218	RETVAL
		1219
		1220	void
		1221	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1222	PPCODE:
		1223	{
		1224	dREQ;
		1225
		1226	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1227	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1228	req->sv1 = newSVsv (fh_or_path);
		1229
		1230	if (SvPOK (req->sv1))
		1231	{
		1232	req->type = EIO_UTIME;
		1233	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1234	}
		1235	else
		1236	{
		1237	req->type = EIO_FUTIME;
		1238	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1239	}
		1240
		1241	REQ_SEND;
		1242	}
		1243
		1244	void
		1245	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1246	PPCODE:
		1247	{
		1248	dREQ;
		1249
		1250	req->sv1 = newSVsv (fh_or_path);
		1251	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1252
		1253	if (SvPOK (req->sv1))
		1254	{
		1255	req->type = EIO_TRUNCATE;
		1256	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1257	}
		1258	else
		1259	{
		1260	req->type = EIO_FTRUNCATE;
		1261	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1262	}
		1263
		1264	REQ_SEND;
		1265	}
		1266
		1267	void
		1268	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1269	ALIAS:
		1270	aio_chmod = EIO_CHMOD
		1271	aio_mkdir = EIO_MKDIR
		1272	PPCODE:
		1273	{
		1274	dREQ;
		1275
		1276	req->int2 = mode;
		1277	req->sv1 = newSVsv (fh_or_path);
		1278
		1279	if (SvPOK (req->sv1))
		1280	{
		1281	req->type = ix;
		1282	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1283	}
		1284	else
		1285	{
		1286	req->type = EIO_FCHMOD;
		1287	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1288	}
		1289
		1290	REQ_SEND;
		1291	}
		1292
		1293	void
		1294	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1295	PPCODE:
		1296	{
		1297	dREQ;
		1298
		1299	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1300	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1301	req->sv1 = newSVsv (fh_or_path);
		1302
		1303	if (SvPOK (req->sv1))
		1304	{
		1305	req->type = EIO_CHOWN;
		1306	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1307	}
		1308	else
		1309	{
		1310	req->type = EIO_FCHOWN;
		1311	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1312	}
		1313
		1314	REQ_SEND;
		1315	}
		1316
		1317	void
		1318	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1319	PPCODE:
		1320	{
		1321	dREQ;
		1322
		1323	req->type = EIO_READDIR;
		1324	req->sv1 = newSVsv (pathname);
		1325	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1326	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1327
		1328	if (flags & EIO_READDIR_DENTS)
		1329	req->int1 |= EIO_READDIR_CUSTOM2;
		1330
		1331	REQ_SEND;
		1332	}
		1333
		1334	void
		1335	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		1336	ALIAS:
		1337	aio_unlink = EIO_UNLINK
		1338	aio_rmdir = EIO_RMDIR
		1339	aio_readdir = EIO_READDIR
		1340	PPCODE:
		1341	{
		1342	dREQ;
		1343
		1344	req->type = ix;
		1345	req->sv1 = newSVsv (pathname);
		1346	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1347
		1348	REQ_SEND;
		1349	}
		1350
		1351	void
		1352	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1353	ALIAS:
		1354	aio_link = EIO_LINK
		1355	aio_symlink = EIO_SYMLINK
		1356	aio_rename = EIO_RENAME
		1357	PPCODE:
		1358	{
		1359	dREQ;
		1360
		1361	req->type = ix;
		1362	req->sv1 = newSVsv (oldpath);
		1363	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1364	req->sv2 = newSVsv (newpath);
		1365	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1366
		1367	REQ_SEND;
		1368	}
		1369
		1370	void
		1371	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1372	PPCODE:
		1373	{
		1374	dREQ;
		1375
		1376	req->type = EIO_MKNOD;
		1377	req->sv1 = newSVsv (pathname);
		1378	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1379	req->int2 = (mode_t)mode;
		1380	req->offs = dev;
		1381
		1382	REQ_SEND;
		1383	}
		1384
		1385	void
		1386	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1387	ALIAS:
		1388	aio_mtouch = EIO_MTOUCH
		1389	aio_msync = EIO_MSYNC
		1390	PPCODE:
		1391	{
		1392	STRLEN svlen;
		1393	char *svptr = SvPVbyte (data, svlen);
		1394	UV len = SvUV (length);
		1395
		1396	if (offset < 0)
		1397	offset += svlen;
		1398
		1399	if (offset < 0 || offset > svlen)
		1400	croak ("offset outside of scalar");
		1401
		1402	if (!SvOK (length) || len + offset > svlen)
		1403	len = svlen - offset;
		1404
		1405	{
		1406	dREQ;
		1407
		1408	req->type = ix;
		1409	req->sv2 = SvREFCNT_inc (data);
		1410	req->ptr2 = (char *)svptr + offset;
		1411	req->size = len;
		1412	req->int1 = flags;
		1413
		1414	REQ_SEND;
		1415	}
		1416	}
		1417
		1418	void
		1419	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1420	PPCODE:
		1421	{
		1422	STRLEN svlen;
		1423	char *svptr = SvPVbyte (data, svlen);
		1424	UV len = SvUV (length);
		1425
		1426	if (offset < 0)
		1427	offset += svlen;
		1428
		1429	if (offset < 0 || offset > svlen)
		1430	croak ("offset outside of scalar");
		1431
		1432	if (!SvOK (length) || len + offset > svlen)
		1433	len = svlen - offset;
		1434
		1435	{
		1436	dREQ;
		1437
		1438	req->type = EIO_MLOCK;
		1439	req->sv2 = SvREFCNT_inc (data);
		1440	req->ptr2 = (char *)svptr + offset;
		1441	req->size = len;
		1442
		1443	REQ_SEND;
		1444	}
		1445	}
		1446
		1447	void
		1448	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1449	PPCODE:
		1450	{
		1451	dREQ;
		1452
		1453	req->type = EIO_MLOCKALL;
		1454	req->int1 = flags;
		1455
		1456	REQ_SEND;
		1457	}
		1458
		1459	void
		1460	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1461	PPCODE:
		1462	{
		1463	dREQ;
		1464
		1465	req->type = EIO_BUSY;
		1466	req->nv1 = delay < 0. ? 0. : delay;
		1467
		1468	REQ_SEND;
		1469	}
		1470
		1471	void
		1472	aio_group (SV *callback=&PL_sv_undef)
		1473	PPCODE:
		1474	{
		1475	dREQ;
		1476
		1477	req->type = EIO_GROUP;
		1478
		1479	req_submit (req);
		1480	XPUSHs (req_sv (req, aio_grp_stash));
		1481	}
		1482
		1483	void
		1484	aio_nop (SV *callback=&PL_sv_undef)
		1485	ALIAS:
		1486	aio_nop = EIO_NOP
		1487	aio_sync = EIO_SYNC
		1488	PPCODE:
		1489	{
		1490	dREQ;
		1491
		1492	req->type = ix;
		1493
		1494	REQ_SEND;
		1495	}
		1496
		1497	int
		1498	aioreq_pri (int pri = 0)
		1499	CODE:
		1500	RETVAL = next_pri;
		1501	if (items > 0)
		1502	{
		1503	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1504	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1505	next_pri = pri;
		1506	}
		1507	OUTPUT:
		1508	RETVAL
		1509
		1510	void
		1511	aioreq_nice (int nice = 0)
		1512	CODE:
		1513	nice = next_pri - nice;
		1514	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1515	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1516	next_pri = nice;
		1517
		1518	void
		1519	flush ()
		1520	CODE:
		1521	while (eio_nreqs ())
405	{	1522	{
406	poll_wait ();	1523	poll_wait ();
407	poll_cb ();	1524	poll_cb ();
408	}	1525	}
409	}
410		1526
411	int	1527	int
412	max_outstanding(nreqs)	1528	poll ()
413	int nreqs
414	PROTOTYPE: $
415	CODE:
416	RETVAL = max_outstanding;
417	max_outstanding = nreqs;
418
419	void
420	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
421	SV * pathname
422	int flags
423	int mode
424	SV * callback
425	PROTOTYPE: $$$;$
426	CODE:	1529	CODE:
427	{
428	aio_req req;
429
430	Newz (0, req, 1, aio_cb);
431
432	if (!req)
433	croak ("out of memory during aio_req allocation");
434
435	req->type = REQ_OPEN;
436	req->data = newSVsv (pathname);
437	req->dataptr = SvPV_nolen (req->data);
438	req->fd = flags;
439	req->mode = mode;
440	req->callback = SvREFCNT_inc (callback);
441
442	send_req (req);
443	}
444
445	void
446	aio_close(fh,callback=&PL_sv_undef)
447	InputStream fh
448	SV * callback
449	PROTOTYPE: $;$
450	ALIAS:
451	aio_close = REQ_CLOSE
452	aio_fsync = REQ_FSYNC
453	aio_fdatasync = REQ_FDATASYNC
454	CODE:
455	{
456	aio_req req;
457
458	Newz (0, req, 1, aio_cb);
459
460	if (!req)
461	croak ("out of memory during aio_req allocation");
462
463	req->type = ix;
464	req->fd = PerlIO_fileno (fh);
465	req->callback = SvREFCNT_inc (callback);
466
467	send_req (req);
468	}
469
470	void
471	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
472	InputStream fh
473	UV offset
474	IV length
475	SV * data
476	IV dataoffset
477	SV * callback
478	PROTOTYPE: $$$$$;$
479	CODE:
480	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
481
482	void
483	aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
484	OutputStream fh
485	UV offset
486	IV length
487	SV * data
488	IV dataoffset
489	SV * callback
490	PROTOTYPE: $$$$$;$
491	CODE:
492	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
493
494	void
495	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
496	InputStream fh
497	UV offset
498	IV length
499	SV * callback
500	PROTOTYPE: $$$;$
501	CODE:
502	{
503	aio_req req;
504
505	if (length < 0)
506	croak ("length must not be negative");
507
508	Newz (0, req, 1, aio_cb);
509
510	if (!req)
511	croak ("out of memory during aio_req allocation");
512
513	req->type = REQ_READAHEAD;
514	req->fd = PerlIO_fileno (fh);
515	req->offset = offset;
516	req->length = length;
517	req->callback = SvREFCNT_inc (callback);
518
519	send_req (req);
520	}
521
522	void
523	aio_stat(fh_or_path,callback=&PL_sv_undef)
524	SV * fh_or_path
525	SV * callback
526	ALIAS:
527	aio_stat = REQ_STAT
528	aio_lstat = REQ_LSTAT
529	CODE:
530	{
531	aio_req req;
532
533	Newz (0, req, 1, aio_cb);
534
535	if (!req)
536	croak ("out of memory during aio_req allocation");
537
538	New (0, req->statdata, 1, Stat_t);
539
540	if (!req->statdata)
541	croak ("out of memory during aio_req->statdata allocation");
542
543	if (SvPOK (fh_or_path))
544	{
545	req->type = ix;
546	req->data = newSVsv (fh_or_path);
547	req->dataptr = SvPV_nolen (req->data);
548	}
549	else
550	{
551	req->type = REQ_FSTAT;
552	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
553	}
554
555	req->callback = SvREFCNT_inc (callback);
556
557	send_req (req);
558	}
559
560	void
561	aio_unlink(pathname,callback=&PL_sv_undef)
562	SV * pathname
563	SV * callback
564	CODE:
565	{
566	aio_req req;
567
568	Newz (0, req, 1, aio_cb);
569
570	if (!req)
571	croak ("out of memory during aio_req allocation");
572
573	req->type = REQ_UNLINK;
574	req->data = newSVsv (pathname);
575	req->dataptr = SvPV_nolen (req->data);
576	req->callback = SvREFCNT_inc (callback);
577
578	send_req (req);
579	}
580
581	void
582	flush()
583	PROTOTYPE:
584	CODE:
585	while (nreqs)
586	{
587	poll_wait ();	1530	poll_wait ();
588	poll_cb ();	1531	RETVAL = poll_cb ();
589	}
590
591	void
592	poll()
593	PROTOTYPE:
594	CODE:
595	if (nreqs)
596	{
597	poll_wait ();
598	poll_cb ();
599	}
600
601	int
602	poll_fileno()
603	PROTOTYPE:
604	CODE:
605	RETVAL = respipe [0];
606	OUTPUT:	1532	OUTPUT:
607	RETVAL	1533	RETVAL
608		1534
609	int	1535	int
		1536	poll_fileno ()
		1537	CODE:
		1538	RETVAL = s_epipe_fd (&respipe);
		1539	OUTPUT:
		1540	RETVAL
		1541
		1542	int
610	poll_cb(...)	1543	poll_cb (...)
611	PROTOTYPE:	1544	PROTOTYPE:
612	CODE:	1545	CODE:
613	RETVAL = poll_cb ();	1546	RETVAL = poll_cb ();
614	OUTPUT:	1547	OUTPUT:
615	RETVAL	1548	RETVAL
616		1549
617	void	1550	void
618	poll_wait()	1551	poll_wait ()
619	PROTOTYPE:
620	CODE:	1552	CODE:
621	if (nreqs)
622	poll_wait ();	1553	poll_wait ();
623		1554
624	int	1555	int
625	nreqs()	1556	nreqs ()
626	PROTOTYPE:
627	CODE:	1557	CODE:
628	RETVAL = nreqs;	1558	RETVAL = eio_nreqs ();
629	OUTPUT:	1559	OUTPUT:
630	RETVAL	1560	RETVAL
631		1561
		1562	int
		1563	nready ()
		1564	CODE:
		1565	RETVAL = eio_nready ();
		1566	OUTPUT:
		1567	RETVAL
		1568
		1569	int
		1570	npending ()
		1571	CODE:
		1572	RETVAL = eio_npending ();
		1573	OUTPUT:
		1574	RETVAL
		1575
		1576	int
		1577	nthreads ()
		1578	CODE:
		1579	RETVAL = eio_nthreads ();
		1580	OUTPUT:
		1581	RETVAL
		1582
		1583	int
		1584	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1585	CODE:
		1586	RETVAL = posix_fadvise (fh, offset, length, advice);
		1587	OUTPUT:
		1588	RETVAL
		1589
		1590	ssize_t
		1591	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1592	CODE:
		1593	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1594	OUTPUT:
		1595	RETVAL
		1596
		1597	void
		1598	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1599	PPCODE:
		1600	sv_unmagic (scalar, MMAP_MAGIC);
		1601	{
		1602	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1603	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1604	if (addr == (void *)-1)
		1605	XSRETURN_NO;
		1606
		1607	sv_force_normal (scalar);
		1608
		1609	/* we store the length in mg_obj, as namlen is I32 :/ */
		1610	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1611	->mg_obj = (SV *)length;
		1612
		1613	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1614
		1615	if (!(prot & PROT_WRITE))
		1616	SvREADONLY_on (scalar);
		1617
		1618	if (SvLEN (scalar))
		1619	Safefree (SvPVX (scalar));
		1620
		1621	SvPVX (scalar) = (char *)addr;
		1622	SvCUR_set (scalar, length);
		1623	SvLEN_set (scalar, 0);
		1624	SvPOK_only (scalar);
		1625
		1626	XSRETURN_YES;
		1627	}
		1628
		1629	void
		1630	munmap (SV *scalar)
		1631	CODE:
		1632	sv_unmagic (scalar, MMAP_MAGIC);
		1633
		1634	int
		1635	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1636	ALIAS:
		1637	mprotect = 1
		1638	CODE:
		1639	{
		1640	STRLEN svlen;
		1641	void *addr = SvPVbyte (scalar, svlen);
		1642	size_t len = SvUV (length);
		1643
		1644	if (offset < 0)
		1645	offset += svlen;
		1646
		1647	if (offset < 0 || offset > svlen)
		1648	croak ("offset outside of scalar");
		1649
		1650	if (!SvOK (length) || len + offset > svlen)
		1651	len = svlen - offset;
		1652
		1653	addr = (void *)(((intptr_t)addr) + offset);
		1654	eio_page_align (&addr, &len);
		1655
		1656	switch (ix)
		1657	{
		1658	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1659	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1660	}
		1661	}
		1662	OUTPUT:
		1663	RETVAL
		1664
		1665	int
		1666	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1667	CODE:
		1668	{
		1669	STRLEN svlen;
		1670	void *addr = SvPVbyte (scalar, svlen);
		1671	size_t 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	addr = (void *)(((intptr_t)addr) + offset);
		1683	eio_page_align (&addr, &len);
		1684	#if _POSIX_MEMLOCK_RANGE
		1685	RETVAL = munlock (addr, len);
		1686	#else
		1687	RETVAL = ((errno = ENOSYS), -1);
		1688	#endif
		1689	}
		1690	OUTPUT:
		1691	RETVAL
		1692
		1693	int
		1694	munlockall ()
		1695	CODE:
		1696	#if _POSIX_MEMLOCK
		1697	munlockall ();
		1698	#else
		1699	RETVAL = -1;
		1700	errno = ENOSYS;
		1701	#endif
		1702	OUTPUT:
		1703	RETVAL
		1704
		1705	void _on_next_submit (SV *cb)
		1706	CODE:
		1707	SvREFCNT_dec (on_next_submit);
		1708	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1709
		1710	PROTOTYPES: DISABLE
		1711
		1712	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1713
		1714	void
		1715	cancel (aio_req_ornot req)
		1716	CODE:
		1717	eio_cancel (req);
		1718
		1719	void
		1720	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1721	PPCODE:
		1722	{
		1723	if (GIMME_V != G_VOID)
		1724	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1725
		1726	if (items > 1)
		1727	{
		1728	SV *cb_cv =get_cb (callback);
		1729
		1730	SvREFCNT_dec (req->callback);
		1731	req->callback = SvREFCNT_inc (cb_cv);
		1732	}
		1733	}
		1734
		1735	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1736
		1737	void
		1738	add (aio_req grp, ...)
		1739	PPCODE:
		1740	{
		1741	int i;
		1742
		1743	if (grp->int1 == 2)
		1744	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1745
		1746	for (i = 1; i < items; ++i )
		1747	{
		1748	aio_req req;
		1749
		1750	if (GIMME_V != G_VOID)
		1751	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1752
		1753	req = SvAIO_REQ (ST (i));
		1754
		1755	if (req)
		1756	eio_grp_add (grp, req);
		1757	}
		1758	}
		1759
		1760	void
		1761	cancel_subs (aio_req_ornot req)
		1762	CODE:
		1763	req_cancel_subs (req);
		1764
		1765	void
		1766	result (aio_req grp, ...)
		1767	CODE:
		1768	{
		1769	int i;
		1770	AV *av;
		1771
		1772	grp->errorno = errno;
		1773
		1774	av = newAV ();
		1775	av_extend (av, items - 1);
		1776
		1777	for (i = 1; i < items; ++i )
		1778	av_push (av, newSVsv (ST (i)));
		1779
		1780	SvREFCNT_dec (grp->sv1);
		1781	grp->sv1 = (SV *)av;
		1782	}
		1783
		1784	void
		1785	errno (aio_req grp, int errorno = errno)
		1786	CODE:
		1787	grp->errorno = errorno;
		1788
		1789	void
		1790	limit (aio_req grp, int limit)
		1791	CODE:
		1792	eio_grp_limit (grp, limit);
		1793
		1794	void
		1795	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1796	CODE:
		1797	{
		1798	SvREFCNT_dec (grp->sv2);
		1799	grp->sv2 = newSVsv (callback);
		1800	grp->feed = aio_grp_feed;
		1801
		1802	if (grp->int2 <= 0)
		1803	grp->int2 = 2;
		1804
		1805	eio_grp_limit (grp, grp->int2);
		1806	}
		1807

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