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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.26 by root, Wed Aug 17 03:52:20 2005 UTC vs.
Revision 1.150 by root, Wed Jul 1 08:11:24 2009 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 <stddef.h>
9		10	#include <stdlib.h>
		11	#include <errno.h>
10	#include <sys/types.h>	12	#include <sys/types.h>
11	#include <sys/stat.h>	13	#include <sys/stat.h>
12
13	#include <unistd.h>	14	#include <limits.h>
14	#include <fcntl.h>	15	#include <fcntl.h>
15	#include <signal.h>
16	#include <sched.h>	16	#include <sched.h>
17		17
18	#include <pthread.h>	18	/* perl namespace pollution */
		19	#undef VERSION
19		20
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	21	#ifdef _WIN32
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
23		22
24	#if __ia64	23	# define EIO_STRUCT_DIRENT Direntry_t
25	# define STACKSIZE 65536	24	# undef malloc
		25	# undef free
		26
		27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
26	#else	59	#else
27	# define STACKSIZE 4096	60
		61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
28	#endif	68	#endif
29		69
		70	/* perl stupidly overrides readdir and maybe others */
		71	/* with thread-unsafe versions, imagine that :( */
		72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		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	static HV *stash;
		103	typedef SV SV8; /* byte-sv, used for argument-checking */
		104	typedef int aio_rfd; /* read file desriptor */
		105	typedef int aio_wfd; /* write file descriptor */
		106
		107	#define AIO_REQ_KLASS "IO::AIO::REQ"
		108	#define AIO_GRP_KLASS "IO::AIO::GRP"
		109
		110	#define EIO_REQ_MEMBERS \
		111	SV *callback; \
		112	SV *sv1, *sv2; \
		113	STRLEN stroffset; \
		114	SV *self;
		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/eio.h"
		119
		120	#ifndef POSIX_FADV_NORMAL
		121	# define POSIX_FADV_NORMAL 0
		122	# define NO_FADVISE 1
		123	#endif
		124
		125	#ifndef POSIX_FADV_SEQUENTIAL
		126	# define POSIX_FADV_SEQUENTIAL 0
		127	#endif
		128
		129	#ifndef POSIX_FADV_RANDOM
		130	# define POSIX_FADV_RANDOM 0
		131	#endif
		132
		133	#ifndef POSIX_FADV_NOREUSE
		134	# define POSIX_FADV_NOREUSE 0
		135	#endif
		136
		137	#ifndef POSIX_FADV_WILLNEED
		138	# define POSIX_FADV_WILLNEED 0
		139	#endif
		140
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	static int req_invoke (eio_req *req);
		146	#define EIO_FINISH(req) req_invoke (req)
		147	static void req_destroy (eio_req *grp);
		148	#define EIO_DESTROY(req) req_destroy (req)
		149
30	enum {	150	enum {
31	REQ_QUIT,	151	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,
35	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,
37	REQ_SYMLINK,
38	};	152	};
39		153
40	typedef struct aio_cb {	154	#include "libeio/eio.c"
41	struct aio_cb *volatile next;
42		155
43	int type;
44
45	int fd;
46	off_t offset;
47	size_t length;
48	ssize_t result;
49	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr, *data2ptr;
53	STRLEN dataoffset;
54
55	Stat_t *statdata;
56	} aio_cb;
57
58	typedef aio_cb *aio_req;	156	typedef eio_req *aio_req;
		157	typedef eio_req *aio_req_ornot;
59		158
60	static int started;	159	static SV *on_next_submit;
61	static volatile int nreqs;	160	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	161	static int max_outstanding;
63	static int respipe [2];
64		162
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	163	static int respipe_osf [2], respipe [2] = { -1, -1 };
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67	static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69		164
70	static volatile aio_req reqs, reqe; /* queue start, queue end */	165	static void req_destroy (aio_req req);
71	static volatile aio_req ress, rese; /* queue start, queue end */
72
73	static void free_req (aio_req req)	166	static void req_cancel (aio_req req);
74	{
75	if (req->data)
76	SvREFCNT_dec (req->data);
77		167
		168	static void want_poll (void)
		169	{
		170	/* write a dummy byte to the pipe so fh becomes ready */
		171	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		172	}
		173
		174	static void done_poll (void)
		175	{
		176	/* read any signals sent by the worker threads */
		177	char buf [4];
		178	while (respipe_read (respipe [0], buf, 4) == 4)
		179	;
		180	}
		181
		182	/* must be called at most once */
		183	static SV *req_sv (aio_req req, const char *klass)
		184	{
78	if (req->fh)	185	if (!req->self)
79	SvREFCNT_dec (req->fh);
80
81	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
82	Safefree (req->statdata);
83
84	if (req->callback)
85	SvREFCNT_dec (req->callback);
86
87	Safefree (req);
88	}
89
90	static void
91	poll_wait ()
92	{
93	if (nreqs && !ress)
94	{	186	{
95	fd_set rfd;	187	req->self = (SV *)newHV ();
96	FD_ZERO(&rfd);	188	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
97	FD_SET(respipe [0], &rfd);
98
99	select (respipe [0] + 1, &rfd, 0, 0, 0);
100	}	189	}
101	}
102		190
103	static int	191	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
104	poll_cb ()	192	}
		193
		194	static aio_req SvAIO_REQ (SV *sv)
		195	{
		196	MAGIC *mg;
		197
		198	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		199	croak ("object of class " AIO_REQ_KLASS " expected");
		200
		201	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		202
		203	return mg ? (aio_req)mg->mg_ptr : 0;
		204	}
		205
		206	static void aio_grp_feed (aio_req grp)
		207	{
		208	if (grp->sv2 && SvOK (grp->sv2))
		209	{
		210	dSP;
		211
		212	ENTER;
		213	SAVETMPS;
		214	PUSHMARK (SP);
		215	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		216	PUTBACK;
		217	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		218	SPAGAIN;
		219	FREETMPS;
		220	LEAVE;
		221	}
		222	}
		223
		224	static void req_submit (eio_req *req)
		225	{
		226	eio_submit (req);
		227
		228	if (expect_false (on_next_submit))
		229	{
		230	dSP;
		231	SV *cb = sv_2mortal (on_next_submit);
		232
		233	on_next_submit = 0;
		234
		235	PUSHMARK (SP);
		236	PUTBACK;
		237	call_sv (cb, G_DISCARD | G_EVAL);
		238	}
		239	}
		240
		241	static int req_invoke (eio_req *req)
105	{	242	{
106	dSP;	243	dSP;
107	int count = 0;
108	int do_croak = 0;
109	aio_req req, prv;
110		244
111	pthread_mutex_lock (&reslock);	245	if (req->flags & FLAG_SV2_RO_OFF)
		246	SvREADONLY_off (req->sv2);
112		247
113	{	248	if (!EIO_CANCELLED (req) && req->callback)
114	/* read any signals sent by the worker threads */
115	char buf [32];
116	while (read (respipe [0], buf, 32) == 32)
117	;
118	}
119
120	req = ress;
121	ress = rese = 0;
122
123	pthread_mutex_unlock (&reslock);
124
125	while (req)
126	{	249	{
127	nreqs--;	250	ENTER;
		251	SAVETMPS;
		252	PUSHMARK (SP);
		253	EXTEND (SP, 1);
128		254
129	if (req->type == REQ_QUIT)	255	switch (req->type)
130	started--;
131	else
132	{	256	{
133	int errorno = errno;	257	case EIO_READDIR:
134	errno = req->errorno;
135
136	if (req->type == REQ_READ)
137	SvCUR_set (req->data, req->dataoffset
138	+ req->result > 0 ? req->result : 0);
139
140	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
141	{	258	{
142	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	259	SV *rv = &PL_sv_undef;
143	PL_laststatval = req->result;	260
144	PL_statcache = *(req->statdata);	261	if (req->result >= 0)
		262	{
		263	int i;
		264	char *names = (char *)req->ptr2;
		265	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		266	AV *av = newAV ();
		267
		268	av_extend (av, req->result - 1);
		269
		270	for (i = 0; i < req->result; ++i)
		271	{
		272	if (req->int1 & EIO_READDIR_DENTS)
		273	{
		274	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		275
		276	if (req->int1 & EIO_READDIR_CUSTOM2)
		277	{
		278	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		279	AV *avent = newAV ();
		280
		281	av_extend (avent, 2);
		282
		283	if (!sv_type [ent->type])
		284	{
		285	sv_type [ent->type] = newSViv (ent->type);
		286	SvREADONLY_on (sv_type [ent->type]);
		287	}
		288
		289	av_store (avent, 0, namesv);
		290	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		291	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		292
		293	av_store (av, i, newRV_noinc ((SV *)avent));
		294	}
		295	else
		296	av_store (av, i, namesv);
		297
		298	++ent;
		299	}
		300	else
		301	{
		302	SV *name = newSVpv (names, 0);
		303	av_store (av, i, name);
		304	names += SvCUR (name) + 1;
		305	}
		306	}
		307
		308	rv = sv_2mortal (newRV_noinc ((SV *)av));
		309	}
		310
		311	PUSHs (rv);
		312
		313	if (req->int1 & EIO_READDIR_CUSTOM1)
		314	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
145	}	315	}
		316	break;
146		317
147	ENTER;	318	case EIO_OPEN:
148	PUSHMARK (SP);
149	XPUSHs (sv_2mortal (newSViv (req->result)));
150
151	if (req->type == REQ_OPEN)
152	{	319	{
153	/* convert fd to fh */	320	/* convert fd to fh */
154	SV *fh;	321	SV *fh = &PL_sv_undef;
155		322
156	PUTBACK;	323	if (req->result >= 0)
157	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	324	{
158	SPAGAIN;	325	GV *gv = (GV *)sv_newmortal ();
		326	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		327	char sym [64];
		328	int symlen;
		329
		330	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		331	gv_init (gv, stash, sym, symlen, 0);
159		332
160	fh = SvREFCNT_inc (POPs);	333	symlen = snprintf (
		334	sym,
		335	sizeof (sym),
		336	"%s&=%d",
		337	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		338	(int)req->result
		339	);
161		340
		341	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		342	fh = (SV *)gv;
		343	}
		344
162	PUSHMARK (SP);	345	PUSHs (fh);
163	XPUSHs (sv_2mortal (fh));
164	}	346	}
		347	break;
165		348
166	if (SvOK (req->callback))	349	case EIO_GROUP:
		350	req->int1 = 2; /* mark group as finished */
		351
		352	if (req->sv1)
		353	{
		354	int i;
		355	AV *av = (AV *)req->sv1;
		356
		357	EXTEND (SP, AvFILL (av) + 1);
		358	for (i = 0; i <= AvFILL (av); ++i)
		359	PUSHs (*av_fetch (av, i, 0));
		360	}
		361	break;
		362
		363	case EIO_NOP:
		364	case EIO_BUSY:
		365	break;
		366
		367	case EIO_READLINK:
		368	if (req->result > 0)
		369	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		370	break;
		371
		372	case EIO_STAT:
		373	case EIO_LSTAT:
		374	case EIO_FSTAT:
		375	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		376	PL_laststatval = req->result;
		377	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		378	PUSHs (sv_2mortal (newSViv (req->result)));
		379	break;
		380
		381	case EIO_READ:
167	{	382	{
168	PUTBACK;	383	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
169	call_sv (req->callback, G_VOID | G_EVAL);	384	*SvEND (req->sv2) = 0;
170	SPAGAIN;	385	SvPOK_only (req->sv2);
		386	SvSETMAGIC (req->sv2);
		387	PUSHs (sv_2mortal (newSViv (req->result)));
171	}	388	}
172
173	LEAVE;
174
175	do_croak = SvTRUE (ERRSV);
176
177	errno = errorno;
178	count++;
179	}
180
181	prv = req;
182	req = req->next;
183	free_req (prv);
184
185	if (do_croak)
186	croak (0);
187	}
188
189	return count;
190	}
191
192	static void *aio_proc(void *arg);
193
194	static void
195	start_thread (void)
196	{
197	sigset_t fullsigset, oldsigset;
198	pthread_t tid;
199	pthread_attr_t attr;
200
201	pthread_attr_init (&attr);
202	pthread_attr_setstacksize (&attr, STACKSIZE);
203	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
204
205	sigfillset (&fullsigset);
206	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
207
208	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
209	started++;
210
211	sigprocmask (SIG_SETMASK, &oldsigset, 0);
212	}
213
214	static void
215	send_req (aio_req req)
216	{
217	nreqs++;
218
219	pthread_mutex_lock (&reqlock);
220
221	req->next = 0;
222
223	if (reqe)
224	{
225	reqe->next = req;
226	reqe = req;
227	}
228	else
229	reqe = reqs = req;
230
231	pthread_cond_signal (&reqwait);
232	pthread_mutex_unlock (&reqlock);
233
234	while (nreqs > max_outstanding)
235	{
236	poll_wait ();
237	poll_cb ();
238	}
239	}
240
241	static void
242	end_thread (void)
243	{
244	aio_req req;
245	Newz (0, req, 1, aio_cb);
246	req->type = REQ_QUIT;
247
248	send_req (req);
249	}
250
251
252	static void min_parallel (int nthreads)
253	{
254	while (nthreads > started)
255	start_thread ();
256	}
257
258	static void max_parallel (int nthreads)
259	{
260	int cur = started;
261	while (cur > nthreads)
262	{
263	end_thread ();
264	cur--;
265	}
266
267	while (started > nthreads)
268	{
269	poll_wait ();
270	poll_cb ();
271	}
272	}
273
274	static void create_pipe ()
275	{
276	if (pipe (respipe))
277	croak ("unable to initialize result pipe");
278
279	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
280	croak ("cannot set result pipe to nonblocking mode");
281
282	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
283	croak ("cannot set result pipe to nonblocking mode");
284	}
285
286	static void atfork_prepare (void)
287	{
288	pthread_mutex_lock (&frklock);
289	pthread_mutex_lock (&reqlock);
290	pthread_mutex_lock (&reslock);
291	}
292
293	static void atfork_parent (void)
294	{
295	pthread_mutex_unlock (&reslock);
296	pthread_mutex_unlock (&reqlock);
297	pthread_mutex_unlock (&frklock);
298	}
299
300	static void atfork_child (void)
301	{
302	int restart = started;
303	started = 0;
304
305	while (reqs)
306	{
307	free_req (reqs);
308	reqs = reqs->next;
309	}
310
311	reqs = reqe = 0;
312
313	while (ress)
314	{
315	free_req (ress);
316	ress = ress->next;
317	}
318
319	ress = rese = 0;
320
321	close (respipe [0]);
322	close (respipe [1]);
323
324	create_pipe ();
325
326	atfork_parent ();
327
328	min_parallel (restart);
329	}
330
331	/*****************************************************************************/
332	/* work around various missing functions */
333
334	#if !HAVE_PREADWRITE
335	# define pread aio_pread
336	# define pwrite aio_pwrite
337
338	/*
339	* make our pread/pwrite safe against themselves, but not against
340	* normal read/write by using a mutex. slows down execution a lot,
341	* but that's your problem, not mine.
342	*/
343	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
344
345	static ssize_t
346	pread (int fd, void *buf, size_t count, off_t offset)
347	{
348	ssize_t res;
349	off_t ooffset;
350
351	pthread_mutex_lock (&iolock);
352	ooffset = lseek (fd, 0, SEEK_CUR);
353	lseek (fd, offset, SEEK_SET);
354	res = read (fd, buf, count);
355	lseek (fd, ooffset, SEEK_SET);
356	pthread_mutex_unlock (&iolock);
357
358	return res;
359	}
360
361	static ssize_t
362	pwrite (int fd, void *buf, size_t count, off_t offset)
363	{
364	ssize_t res;
365	off_t ooffset;
366
367	pthread_mutex_lock (&iolock);
368	ooffset = lseek (fd, 0, SEEK_CUR);
369	lseek (fd, offset, SEEK_SET);
370	res = write (fd, buf, count);
371	lseek (fd, offset, SEEK_SET);
372	pthread_mutex_unlock (&iolock);
373
374	return res;
375	}
376	#endif
377
378	#if !HAVE_FDATASYNC
379	# define fdatasync fsync
380	#endif
381
382	#if !HAVE_READAHEAD
383	# define readahead aio_readahead
384
385	static char readahead_buf[4096];
386
387	static ssize_t
388	readahead (int fd, off_t offset, size_t count)
389	{
390	while (count > 0)
391	{
392	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
393
394	pread (fd, readahead_buf, len, offset);
395	offset += len;
396	count -= len;
397	}
398
399	errno = 0;
400	}
401	#endif
402
403	/*****************************************************************************/
404
405	static void *
406	aio_proc (void *thr_arg)
407	{
408	aio_req req;
409	int type;
410
411	do
412	{
413	pthread_mutex_lock (&reqlock);
414
415	for (;;)
416	{
417	req = reqs;
418
419	if (reqs)
420	{
421	reqs = reqs->next;
422	if (!reqs) reqe = 0;
423	}
424
425	if (req)
426	break;	389	break;
427		390
428	pthread_cond_wait (&reqwait, &reqlock);
429	}
430
431	pthread_mutex_unlock (&reqlock);
432
433	errno = 0; /* strictly unnecessary */
434
435	type = req->type;
436
437	switch (type)
438	{
439	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
440	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
441
442	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
443
444	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
445	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
446	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
447
448	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
449	case REQ_CLOSE: req->result = close (req->fd); break;
450	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
451	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
452	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
453
454	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
455	case REQ_FSYNC: req->result = fsync (req->fd); break;
456
457	case REQ_QUIT:	391	case EIO_DUP2:
458	break;	392	if (req->result > 0)
		393	req->result = 0;
		394	/* FALLTHROUGH */
459		395
460	default:	396	default:
461	req->result = ENOSYS;	397	PUSHs (sv_2mortal (newSViv (req->result)));
462	break;	398	break;
463	}	399	}
464		400
465	req->errorno = errno;	401	errno = req->errorno;
466		402
467	pthread_mutex_lock (&reslock);	403	PUTBACK;
		404	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		405	SPAGAIN;
468		406
469	req->next = 0;	407	FREETMPS;
		408	LEAVE;
470		409
471	if (rese)	410	PUTBACK;
472	{
473	rese->next = req;
474	rese = req;
475	}
476	else
477	{
478	rese = ress = req;
479
480	/* write a dummy byte to the pipe so fh becomes ready */
481	write (respipe [1], &respipe, 1);
482	}
483
484	pthread_mutex_unlock (&reslock);
485	}	411	}
486	while (type != REQ_QUIT);
487		412
		413	return !!SvTRUE (ERRSV);
		414	}
		415
		416	static void req_destroy (aio_req req)
		417	{
		418	if (req->self)
		419	{
		420	sv_unmagic (req->self, PERL_MAGIC_ext);
		421	SvREFCNT_dec (req->self);
		422	}
		423
		424	SvREFCNT_dec (req->sv1);
		425	SvREFCNT_dec (req->sv2);
		426	SvREFCNT_dec (req->callback);
		427
		428	Safefree (req);
		429	}
		430
		431	static void req_cancel_subs (aio_req grp)
		432	{
		433	aio_req sub;
		434
		435	if (grp->type != EIO_GROUP)
		436	return;
		437
		438	SvREFCNT_dec (grp->sv2);
		439	grp->sv2 = 0;
		440
		441	eio_grp_cancel (grp);
		442	}
		443
		444	#ifdef USE_SOCKETS_AS_HANDLES
		445	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		446	#else
		447	# define TO_SOCKET(x) (x)
		448	#endif
		449
		450	static void
		451	create_respipe (void)
		452	{
		453	int old_readfd = respipe [0];
		454
		455	if (respipe [1] >= 0)
		456	respipe_close (TO_SOCKET (respipe [1]));
		457
		458	#ifdef _WIN32
		459	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		460	#else
		461	if (pipe (respipe))
		462	#endif
		463	croak ("unable to initialize result pipe");
		464
		465	if (old_readfd >= 0)
		466	{
		467	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		468	croak ("unable to initialize result pipe(2)");
		469
		470	respipe_close (respipe [0]);
		471	respipe [0] = old_readfd;
		472	}
		473
		474	#ifdef _WIN32
		475	int arg = 1;
		476	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		477	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		478	#else
		479	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		480	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		481	#endif
		482	croak ("unable to initialize result pipe(3)");
		483
		484	respipe_osf [0] = TO_SOCKET (respipe [0]);
		485	respipe_osf [1] = TO_SOCKET (respipe [1]);
		486	}
		487
		488	static void poll_wait (void)
		489	{
		490	fd_set rfd;
		491
		492	while (eio_nreqs ())
		493	{
		494	int size;
		495
		496	X_LOCK (reslock);
		497	size = res_queue.size;
		498	X_UNLOCK (reslock);
		499
		500	if (size)
		501	return;
		502
		503	etp_maybe_start_thread ();
		504
		505	FD_ZERO (&rfd);
		506	FD_SET (respipe [0], &rfd);
		507
		508	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		509	}
		510	}
		511
		512	static int poll_cb (void)
		513	{
		514	for (;;)
		515	{
		516	int res = eio_poll ();
		517
		518	if (res > 0)
		519	croak (0);
		520
		521	if (!max_outstanding || max_outstanding > eio_nreqs ())
		522	return res;
		523
		524	poll_wait ();
		525	}
		526	}
		527
		528	static void atfork_child (void)
		529	{
		530	create_respipe ();
		531	}
		532
		533	static SV *
		534	get_cb (SV *cb_sv)
		535	{
		536	HV *st;
		537	GV *gvp;
		538	CV *cv;
		539
		540	if (!SvOK (cb_sv))
488	return 0;	541	return 0;
		542
		543	cv = sv_2cv (cb_sv, &st, &gvp, 0);
		544
		545	if (!cv)
		546	croak ("IO::AIO callback must be undef or a CODE reference");
		547
		548	return (SV *)cv;
489	}	549	}
490		550
491	#define dREQ \	551	#define dREQ \
		552	SV *cb_cv; \
492	aio_req req; \	553	aio_req req; \
		554	int req_pri = next_pri; \
		555	next_pri = EIO_PRI_DEFAULT; \
493	\	556	\
494	if (SvOK (callback) && !SvROK (callback)) \	557	cb_cv = get_cb (callback); \
495	croak ("clalback must be undef or of reference type"); \
496	\	558	\
497	Newz (0, req, 1, aio_cb); \	559	Newz (0, req, 1, eio_req); \
498	if (!req) \	560	if (!req) \
499	croak ("out of memory during aio_req allocation"); \	561	croak ("out of memory during eio_req allocation"); \
500	\	562	\
501	req->callback = SvREFCNT_inc (callback);	563	req->callback = SvREFCNT_inc (cb_cv); \
502		564	req->pri = req_pri
		565
		566	#define REQ_SEND \
		567	PUTBACK; \
		568	req_submit (req); \
		569	SPAGAIN; \
		570	\
		571	if (GIMME_V != G_VOID) \
		572	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		573
		574	static int
		575	extract_fd (SV *fh, int wr)
		576	{
		577	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		578
		579	if (fd < 0)
		580	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		581
		582	return fd;
		583	}
		584
503	MODULE = IO::AIO PACKAGE = IO::AIO	585	MODULE = IO::AIO PACKAGE = IO::AIO
504		586
505	PROTOTYPES: ENABLE	587	PROTOTYPES: ENABLE
506		588
507	BOOT:	589	BOOT:
508	{	590	{
		591	static const struct {
		592	const char *name;
		593	IV iv;
		594	} *civ, const_iv[] = {
		595	# define const_iv(name, value) { # name, (IV) value },
		596	# define const_eio(name) { # name, (IV) EIO_ ## name },
		597	const_iv (EXDEV , EXDEV)
		598	const_iv (ENOSYS , ENOSYS)
		599	const_iv (O_RDONLY, O_RDONLY)
		600	const_iv (O_WRONLY, O_WRONLY)
		601	const_iv (O_CREAT , O_CREAT)
		602	const_iv (O_TRUNC , O_TRUNC)
		603	#ifndef _WIN32
		604	const_iv (S_IFIFO , S_IFIFO)
		605	#endif
		606	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		607	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		608	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		609	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		610	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		611	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		612
		613	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		614	const_eio (SYNC_FILE_RANGE_WRITE)
		615	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		616
		617	const_eio (READDIR_DENTS)
		618	const_eio (READDIR_DIRS_FIRST)
		619	const_eio (READDIR_STAT_ORDER)
		620	const_eio (READDIR_FOUND_UNKNOWN)
		621
		622	const_eio (DT_UNKNOWN)
		623	const_eio (DT_FIFO)
		624	const_eio (DT_CHR)
		625	const_eio (DT_DIR)
		626	const_eio (DT_BLK)
		627	const_eio (DT_REG)
		628	const_eio (DT_LNK)
		629	const_eio (DT_SOCK)
		630	const_eio (DT_WHT)
		631	};
		632
		633	stash = gv_stashpv ("IO::AIO", 1);
		634
		635	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		636	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
		637
509	create_pipe ();	638	create_respipe ();
510	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
511	}
512		639
		640	if (eio_init (want_poll, done_poll) < 0)
		641	croak ("IO::AIO: unable to initialise eio library");
		642
		643	/* atfork child called in fifo order, so before eio's handler */
		644	X_THREAD_ATFORK (0, 0, atfork_child);
		645	}
		646
513	void	647	void
514	min_parallel(nthreads)	648	max_poll_reqs (int nreqs)
515	int nthreads
516	PROTOTYPE: $	649	PROTOTYPE: $
		650	CODE:
		651	eio_set_max_poll_reqs (nreqs);
517		652
518	void	653	void
519	max_parallel(nthreads)	654	max_poll_time (double nseconds)
520	int nthreads
521	PROTOTYPE: $	655	PROTOTYPE: $
522
523	int
524	max_outstanding(nreqs)
525	int nreqs
526	PROTOTYPE: $
527	CODE:	656	CODE:
528	RETVAL = max_outstanding;	657	eio_set_max_poll_time (nseconds);
		658
		659	void
		660	min_parallel (int nthreads)
		661	PROTOTYPE: $
		662	CODE:
		663	eio_set_min_parallel (nthreads);
		664
		665	void
		666	max_parallel (int nthreads)
		667	PROTOTYPE: $
		668	CODE:
		669	eio_set_max_parallel (nthreads);
		670
		671	void
		672	max_idle (int nthreads)
		673	PROTOTYPE: $
		674	CODE:
		675	eio_set_max_idle (nthreads);
		676
		677	void
		678	max_outstanding (int maxreqs)
		679	PROTOTYPE: $
		680	CODE:
529	max_outstanding = nreqs;	681	max_outstanding = maxreqs;
530		682
531	void	683	void
532	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	684	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
533	SV * pathname
534	int flags
535	int mode
536	SV * callback
537	PROTOTYPE: $$$;$	685	PROTOTYPE: $$$;$
538	CODE:	686	PPCODE:
539	{	687	{
540	dREQ;	688	dREQ;
541		689
542	req->type = REQ_OPEN;	690	req->type = EIO_OPEN;
543	req->data = newSVsv (pathname);	691	req->sv1 = newSVsv (pathname);
544	req->dataptr = SvPVbyte_nolen (req->data);	692	req->ptr1 = SvPVbyte_nolen (req->sv1);
545	req->fd = flags;	693	req->int1 = flags;
546	req->mode = mode;	694	req->int2 = mode;
547		695
548	send_req (req);	696	REQ_SEND;
549	}	697	}
550		698
551	void	699	void
552	aio_close(fh,callback=&PL_sv_undef)	700	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
553	SV * fh
554	SV * callback
555	PROTOTYPE: $;$	701	PROTOTYPE: $;$
556	ALIAS:	702	ALIAS:
557	aio_close = REQ_CLOSE
558	aio_fsync = REQ_FSYNC	703	aio_fsync = EIO_FSYNC
559	aio_fdatasync = REQ_FDATASYNC	704	aio_fdatasync = EIO_FDATASYNC
560	CODE:	705	PPCODE:
561	{	706	{
		707	int fd = extract_fd (fh, 0);
562	dREQ;	708	dREQ;
563		709
564	req->type = ix;	710	req->type = ix;
565	req->fh = newSVsv (fh);	711	req->sv1 = newSVsv (fh);
566	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	712	req->int1 = fd;
567		713
568	send_req (req);	714	REQ_SEND (req);
569	}	715	}
570		716
571	void	717	void
		718	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		719	PROTOTYPE: $$$$;$
		720	PPCODE:
		721	{
		722	int fd = extract_fd (fh, 0);
		723	dREQ;
		724
		725	req->type = EIO_SYNC_FILE_RANGE;
		726	req->sv1 = newSVsv (fh);
		727	req->int1 = fd;
		728	req->offs = offset;
		729	req->size = nbytes;
		730	req->int2 = flags;
		731
		732	REQ_SEND (req);
		733	}
		734
		735	void
		736	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		737	PROTOTYPE: $;$
		738	PPCODE:
		739	{
		740	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		741	int fd = extract_fd (fh, 0);
		742	dREQ;
		743
		744	if (close_pipe < 0)
		745	{
		746	int pipefd [2];
		747
		748	if (pipe (pipefd) < 0
		749	|| close (pipefd [1]) < 0
		750	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		751	abort (); /*D*/
		752
		753	close_pipe = pipefd [0];
		754	}
		755
		756	req->type = EIO_DUP2;
		757	req->int1 = close_pipe;
		758	req->sv2 = newSVsv (fh);
		759	req->int2 = fd;
		760
		761	REQ_SEND (req);
		762	}
		763
		764	void
572	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	765	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
573	SV * fh
574	UV offset
575	IV length
576	SV * data
577	IV dataoffset
578	SV * callback
579	ALIAS:	766	ALIAS:
580	aio_read = REQ_READ	767	aio_read = EIO_READ
581	aio_write = REQ_WRITE	768	aio_write = EIO_WRITE
582	PROTOTYPE: $$$$$;$	769	PROTOTYPE: $$$$$;$
583	CODE:	770	PPCODE:
584	{	771	{
585	aio_req req;
586	STRLEN svlen;	772	STRLEN svlen;
		773	int fd = extract_fd (fh, ix == EIO_WRITE);
587	char *svptr = SvPVbyte (data, svlen);	774	char *svptr = SvPVbyte (data, svlen);
588		775	UV len = SvUV (length);
589	SvUPGRADE (data, SVt_PV);
590	SvPOK_on (data);
591		776
592	if (dataoffset < 0)	777	if (dataoffset < 0)
593	dataoffset += svlen;	778	dataoffset += svlen;
594		779
595	if (dataoffset < 0 || dataoffset > svlen)	780	if (dataoffset < 0 || dataoffset > svlen)
596	croak ("data offset outside of string");	781	croak ("dataoffset outside of data scalar");
597		782
598	if (ix == REQ_WRITE)	783	if (ix == EIO_WRITE)
599	{	784	{
600	/* write: check length and adjust. */	785	/* write: check length and adjust. */
601	if (length < 0 || length + dataoffset > svlen)	786	if (!SvOK (length) || len + dataoffset > svlen)
602	length = svlen - dataoffset;	787	len = svlen - dataoffset;
603	}	788	}
604	else	789	else
605	{	790	{
606	/* read: grow scalar as necessary */	791	/* read: check type and grow scalar as necessary */
		792	SvUPGRADE (data, SVt_PV);
607	svptr = SvGROW (data, length + dataoffset);	793	svptr = SvGROW (data, len + dataoffset + 1);
608	}	794	}
609
610	if (length < 0)
611	croak ("length must not be negative");
612		795
613	{	796	{
614	dREQ;	797	dREQ;
615		798
616	req->type = ix;	799	req->type = ix;
617	req->fh = newSVsv (fh);	800	req->sv1 = newSVsv (fh);
618	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	801	req->int1 = fd;
619	: IoOFP (sv_2io (fh)));	802	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
620	req->offset = offset;	803	req->size = len;
621	req->length = length;
622	req->data = SvREFCNT_inc (data);	804	req->sv2 = SvREFCNT_inc (data);
623	req->dataptr = (char *)svptr + dataoffset;	805	req->ptr2 = (char *)svptr + dataoffset;
624	req->callback = SvREFCNT_inc (callback);	806	req->stroffset = dataoffset;
625		807
626	send_req (req);	808	if (!SvREADONLY (data))
		809	{
		810	SvREADONLY_on (data);
		811	req->flags |= FLAG_SV2_RO_OFF;
		812	}
		813
		814	REQ_SEND;
627	}	815	}
628	}	816	}
629		817
630	void	818	void
		819	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		820	PROTOTYPE: $$;$
		821	PPCODE:
		822	{
		823	SV *data;
		824	dREQ;
		825
		826	req->type = EIO_READLINK;
		827	req->sv1 = newSVsv (path);
		828	req->ptr1 = SvPVbyte_nolen (req->sv1);
		829
		830	REQ_SEND;
		831	}
		832
		833	void
		834	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		835	PROTOTYPE: $$$$;$
		836	PPCODE:
		837	{
		838	int ifd = extract_fd (in_fh , 0);
		839	int ofd = extract_fd (out_fh, 0);
		840	dREQ;
		841
		842	req->type = EIO_SENDFILE;
		843	req->sv1 = newSVsv (out_fh);
		844	req->int1 = ofd;
		845	req->sv2 = newSVsv (in_fh);
		846	req->int2 = ifd;
		847	req->offs = in_offset;
		848	req->size = length;
		849
		850	REQ_SEND;
		851	}
		852
		853	void
631	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	854	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
632	SV * fh
633	UV offset
634	IV length
635	SV * callback
636	PROTOTYPE: $$$;$	855	PROTOTYPE: $$$;$
637	CODE:	856	PPCODE:
638	{	857	{
		858	int fd = extract_fd (fh, 0);
639	dREQ;	859	dREQ;
640		860
641	req->type = REQ_READAHEAD;	861	req->type = EIO_READAHEAD;
642	req->fh = newSVsv (fh);	862	req->sv1 = newSVsv (fh);
643	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	863	req->int1 = fd;
644	req->offset = offset;	864	req->offs = offset;
645	req->length = length;	865	req->size = length;
646		866
647	send_req (req);	867	REQ_SEND;
648	}	868	}
649		869
650	void	870	void
651	aio_stat(fh_or_path,callback=&PL_sv_undef)	871	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
652	SV * fh_or_path
653	SV * callback
654	ALIAS:	872	ALIAS:
655	aio_stat = REQ_STAT	873	aio_stat = EIO_STAT
656	aio_lstat = REQ_LSTAT	874	aio_lstat = EIO_LSTAT
657	CODE:	875	PPCODE:
658	{	876	{
659	dREQ;	877	dREQ;
660		878
661	New (0, req->statdata, 1, Stat_t);	879	req->sv1 = newSVsv (fh_or_path);
662	if (!req->statdata)
663	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");
664		880
665	if (SvPOK (fh_or_path))	881	if (SvPOK (req->sv1))
666	{	882	{
667	req->type = ix;	883	req->type = ix;
668	req->data = newSVsv (fh_or_path);
669	req->dataptr = SvPVbyte_nolen (req->data);	884	req->ptr1 = SvPVbyte_nolen (req->sv1);
670	}	885	}
671	else	886	else
672	{	887	{
673	req->type = REQ_FSTAT;	888	req->type = EIO_FSTAT;
674	req->fh = newSVsv (fh_or_path);
675	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	889	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		890	}
		891
		892	REQ_SEND;
		893	}
		894
		895	void
		896	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		897	PPCODE:
		898	{
		899	dREQ;
		900
		901	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		902	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		903	req->sv1 = newSVsv (fh_or_path);
		904
		905	if (SvPOK (req->sv1))
676	}	906	{
		907	req->type = EIO_UTIME;
		908	req->ptr1 = SvPVbyte_nolen (req->sv1);
		909	}
		910	else
		911	{
		912	req->type = EIO_FUTIME;
		913	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		914	}
677		915
678	send_req (req);	916	REQ_SEND;
679	}	917	}
680		918
681	void	919	void
		920	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		921	PPCODE:
		922	{
		923	dREQ;
		924
		925	req->sv1 = newSVsv (fh_or_path);
		926	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		927
		928	if (SvPOK (req->sv1))
		929	{
		930	req->type = EIO_TRUNCATE;
		931	req->ptr1 = SvPVbyte_nolen (req->sv1);
		932	}
		933	else
		934	{
		935	req->type = EIO_FTRUNCATE;
		936	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		937	}
		938
		939	REQ_SEND;
		940	}
		941
		942	void
		943	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		944	ALIAS:
		945	aio_chmod = EIO_CHMOD
		946	aio_mkdir = EIO_MKDIR
		947	PPCODE:
		948	{
		949	dREQ;
		950
		951	req->int2 = mode;
		952	req->sv1 = newSVsv (fh_or_path);
		953
		954	if (SvPOK (req->sv1))
		955	{
		956	req->type = ix;
		957	req->ptr1 = SvPVbyte_nolen (req->sv1);
		958	}
		959	else
		960	{
		961	req->type = EIO_FCHMOD;
		962	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		963	}
		964
		965	REQ_SEND;
		966	}
		967
		968	void
		969	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		970	PPCODE:
		971	{
		972	dREQ;
		973
		974	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		975	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		976	req->sv1 = newSVsv (fh_or_path);
		977
		978	if (SvPOK (req->sv1))
		979	{
		980	req->type = EIO_CHOWN;
		981	req->ptr1 = SvPVbyte_nolen (req->sv1);
		982	}
		983	else
		984	{
		985	req->type = EIO_FCHOWN;
		986	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		987	}
		988
		989	REQ_SEND;
		990	}
		991
		992	void
		993	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		994	PPCODE:
		995	{
		996	dREQ;
		997
		998	req->type = EIO_READDIR;
		999	req->sv1 = newSVsv (pathname);
		1000	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1001	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1002
		1003	if (flags & EIO_READDIR_DENTS)
		1004	req->int1 |= EIO_READDIR_CUSTOM2;
		1005
		1006	REQ_SEND;
		1007	}
		1008
		1009	void
682	aio_unlink(pathname,callback=&PL_sv_undef)	1010	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
683	SV * pathname
684	SV * callback
685	ALIAS:	1011	ALIAS:
686	aio_unlink = REQ_UNLINK	1012	aio_unlink = EIO_UNLINK
687	aio_rmdir = REQ_RMDIR	1013	aio_rmdir = EIO_RMDIR
		1014	aio_readdir = EIO_READDIR
688	CODE:	1015	PPCODE:
689	{	1016	{
690	dREQ;	1017	dREQ;
691		1018
692	req->type = ix;	1019	req->type = ix;
693	req->data = newSVsv (pathname);	1020	req->sv1 = newSVsv (pathname);
694	req->dataptr = SvPVbyte_nolen (req->data);	1021	req->ptr1 = SvPVbyte_nolen (req->sv1);
695
696	send_req (req);
697	}
698		1022
		1023	REQ_SEND;
		1024	}
		1025
699	void	1026	void
700	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1027	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
701	SV * oldpath	1028	ALIAS:
702	SV * newpath	1029	aio_link = EIO_LINK
703	SV * callback	1030	aio_symlink = EIO_SYMLINK
		1031	aio_rename = EIO_RENAME
704	CODE:	1032	PPCODE:
705	{	1033	{
706	dREQ;	1034	dREQ;
707		1035
708	req->type = REQ_SYMLINK;	1036	req->type = ix;
709	req->fh = newSVsv (oldpath);	1037	req->sv1 = newSVsv (oldpath);
710	req->data2ptr = SvPVbyte_nolen (req->fh);	1038	req->ptr1 = SvPVbyte_nolen (req->sv1);
711	req->data = newSVsv (newpath);	1039	req->sv2 = newSVsv (newpath);
712	req->dataptr = SvPVbyte_nolen (req->data);	1040	req->ptr2 = SvPVbyte_nolen (req->sv2);
713		1041
714	send_req (req);	1042	REQ_SEND;
715	}	1043	}
716		1044
717	void	1045	void
		1046	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1047	PPCODE:
		1048	{
		1049	dREQ;
		1050
		1051	req->type = EIO_MKNOD;
		1052	req->sv1 = newSVsv (pathname);
		1053	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1054	req->int2 = (mode_t)mode;
		1055	req->offs = dev;
		1056
		1057	REQ_SEND;
		1058	}
		1059
		1060	void
		1061	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1062	PPCODE:
		1063	{
		1064	dREQ;
		1065
		1066	req->type = EIO_BUSY;
		1067	req->nv1 = delay < 0. ? 0. : delay;
		1068
		1069	REQ_SEND;
		1070	}
		1071
		1072	void
		1073	aio_group (SV *callback=&PL_sv_undef)
		1074	PROTOTYPE: ;$
		1075	PPCODE:
		1076	{
		1077	dREQ;
		1078
		1079	req->type = EIO_GROUP;
		1080
		1081	req_submit (req);
		1082	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1083	}
		1084
		1085	void
		1086	aio_nop (SV *callback=&PL_sv_undef)
		1087	ALIAS:
		1088	aio_nop = EIO_NOP
		1089	aio_sync = EIO_SYNC
		1090	PPCODE:
		1091	{
		1092	dREQ;
		1093
		1094	req->type = ix;
		1095
		1096	REQ_SEND;
		1097	}
		1098
		1099	int
		1100	aioreq_pri (int pri = 0)
		1101	PROTOTYPE: ;$
		1102	CODE:
		1103	RETVAL = next_pri;
		1104	if (items > 0)
		1105	{
		1106	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1107	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1108	next_pri = pri;
		1109	}
		1110	OUTPUT:
		1111	RETVAL
		1112
		1113	void
		1114	aioreq_nice (int nice = 0)
		1115	CODE:
		1116	nice = next_pri - nice;
		1117	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1118	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1119	next_pri = nice;
		1120
		1121	void
718	flush()	1122	flush ()
719	PROTOTYPE:	1123	PROTOTYPE:
720	CODE:	1124	CODE:
721	while (nreqs)	1125	while (eio_nreqs ())
722	{	1126	{
723	poll_wait ();	1127	poll_wait ();
724	poll_cb ();	1128	poll_cb ();
725	}	1129	}
726		1130
727	void	1131	int
728	poll()	1132	poll()
729	PROTOTYPE:	1133	PROTOTYPE:
730	CODE:	1134	CODE:
731	if (nreqs)
732	{
733	poll_wait ();	1135	poll_wait ();
734	poll_cb ();	1136	RETVAL = poll_cb ();
735	}	1137	OUTPUT:
		1138	RETVAL
736		1139
737	int	1140	int
738	poll_fileno()	1141	poll_fileno()
739	PROTOTYPE:	1142	PROTOTYPE:
740	CODE:	1143	CODE:
…		…
752		1155
753	void	1156	void
754	poll_wait()	1157	poll_wait()
755	PROTOTYPE:	1158	PROTOTYPE:
756	CODE:	1159	CODE:
757	if (nreqs)
758	poll_wait ();	1160	poll_wait ();
759		1161
760	int	1162	int
761	nreqs()	1163	nreqs()
762	PROTOTYPE:	1164	PROTOTYPE:
763	CODE:	1165	CODE:
764	RETVAL = nreqs;	1166	RETVAL = eio_nreqs ();
765	OUTPUT:	1167	OUTPUT:
766	RETVAL	1168	RETVAL
767		1169
		1170	int
		1171	nready()
		1172	PROTOTYPE:
		1173	CODE:
		1174	RETVAL = eio_nready ();
		1175	OUTPUT:
		1176	RETVAL
		1177
		1178	int
		1179	npending()
		1180	PROTOTYPE:
		1181	CODE:
		1182	RETVAL = eio_npending ();
		1183	OUTPUT:
		1184	RETVAL
		1185
		1186	int
		1187	nthreads()
		1188	PROTOTYPE:
		1189	CODE:
		1190	RETVAL = eio_nthreads ();
		1191	OUTPUT:
		1192	RETVAL
		1193
		1194	int
		1195	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1196	PROTOTYPE: $$$$
		1197	CODE:
		1198	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1199	RETVAL = posix_fadvise (fh, offset, length, advice);
		1200	#else
		1201	RETVAL = errno = ENOSYS;
		1202	#endif
		1203	OUTPUT:
		1204	RETVAL
		1205
		1206	ssize_t
		1207	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1208	PROTOTYPE: $$$$
		1209	CODE:
		1210	eio_sendfile_sync (ofh, ifh, offset, count);
		1211
		1212	void _on_next_submit (SV *cb)
		1213	CODE:
		1214	SvREFCNT_dec (on_next_submit);
		1215	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1216
		1217	PROTOTYPES: DISABLE
		1218
		1219	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1220
		1221	void
		1222	cancel (aio_req_ornot req)
		1223	CODE:
		1224	eio_cancel (req);
		1225
		1226	void
		1227	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1228	PPCODE:
		1229	{
		1230	if (GIMME_V != G_VOID)
		1231	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1232
		1233	if (items > 1)
		1234	{
		1235	SV *cb_cv = get_cb (callback);
		1236
		1237	SvREFCNT_dec (req->callback);
		1238	req->callback = SvREFCNT_inc (cb_cv);
		1239	}
		1240	}
		1241
		1242	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1243
		1244	void
		1245	add (aio_req grp, ...)
		1246	PPCODE:
		1247	{
		1248	int i;
		1249
		1250	if (grp->int1 == 2)
		1251	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1252
		1253	for (i = 1; i < items; ++i )
		1254	{
		1255	aio_req req;
		1256
		1257	if (GIMME_V != G_VOID)
		1258	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1259
		1260	req = SvAIO_REQ (ST (i));
		1261
		1262	if (req)
		1263	eio_grp_add (grp, req);
		1264	}
		1265	}
		1266
		1267	void
		1268	cancel_subs (aio_req_ornot req)
		1269	CODE:
		1270	req_cancel_subs (req);
		1271
		1272	void
		1273	result (aio_req grp, ...)
		1274	CODE:
		1275	{
		1276	int i;
		1277	AV *av;
		1278
		1279	grp->errorno = errno;
		1280
		1281	av = newAV ();
		1282	av_extend (av, items - 1);
		1283
		1284	for (i = 1; i < items; ++i )
		1285	av_push (av, newSVsv (ST (i)));
		1286
		1287	SvREFCNT_dec (grp->sv1);
		1288	grp->sv1 = (SV *)av;
		1289	}
		1290
		1291	void
		1292	errno (aio_req grp, int errorno = errno)
		1293	CODE:
		1294	grp->errorno = errorno;
		1295
		1296	void
		1297	limit (aio_req grp, int limit)
		1298	CODE:
		1299	eio_grp_limit (grp, limit);
		1300
		1301	void
		1302	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1303	CODE:
		1304	{
		1305	SvREFCNT_dec (grp->sv2);
		1306	grp->sv2 = newSVsv (callback);
		1307	grp->feed = aio_grp_feed;
		1308
		1309	if (grp->int2 <= 0)
		1310	grp->int2 = 2;
		1311
		1312	eio_grp_limit (grp, grp->int2);
		1313	}
		1314

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