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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.18 by root, Sun Jul 31 19:00:31 2005 UTC vs.
Revision 1.143 by root, Sat Jun 6 19:44:17 2009 UTC

		1	#include "libeio/xthread.h"
		2
		3	#include <errno.h>
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "autoconf/config.h"	9	#include <stddef.h>
6		10	#include <stdlib.h>
		11	#include <errno.h>
7	#include <sys/types.h>	12	#include <sys/types.h>
8	#include <sys/stat.h>	13	#include <sys/stat.h>
9
10	#include <unistd.h>	14	#include <limits.h>
11	#include <fcntl.h>	15	#include <fcntl.h>
12	#include <signal.h>
13	#include <sched.h>	16	#include <sched.h>
14		17
15	#ifndef _REENTRANT	18	/* perl namespace pollution */
16	# define _REENTRANT 1	19	#undef VERSION
		20
		21	#ifdef _WIN32
		22
		23	# define EIO_STRUCT_DIRENT Direntry_t
		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
		59	#else
		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
17	#endif	68	#endif
18	#include <errno.h>
19		69
20	#include <pthread.h>	70	/* perl stupidly overrides readdir and maybe others */
		71	/* with thread-unsafe versions, imagine that :( */
		72	#undef readdir
		73	#undef opendir
		74	#undef closedir
21		75
22	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	76	#define EIO_STRUCT_STAT Stat_t
23	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
24	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
25		77
26	#if __ia64	78	/* use NV for 32 bit perls as it allows larger offsets */
27	# define STACKSIZE 65536	79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
28	#else	81	#else
29	# define STACKSIZE 4096	82	# define SvVAL64 SvNV
30	#endif	83	#endif
31		84
		85	/*****************************************************************************/
		86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
		89	#else
		90	# define expect(expr,value) (expr)
		91	#endif
		92
		93	#define expect_false(expr) expect ((expr) != 0, 0)
		94	#define expect_true(expr) expect ((expr) != 0, 1)
		95
		96	/*****************************************************************************/
		97
		98	static HV *stash;
		99	typedef SV SV8; /* byte-sv, used for argument-checking */
		100
		101	#define AIO_REQ_KLASS "IO::AIO::REQ"
		102	#define AIO_GRP_KLASS "IO::AIO::GRP"
		103
		104	#define EIO_REQ_MEMBERS \
		105	SV *callback; \
		106	SV *sv1, *sv2; \
		107	STRLEN stroffset; \
		108	SV *self;
		109
		110	#define EIO_NO_WRAPPERS 1
		111
		112	#include "libeio/eio.h"
		113
		114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void req_destroy (eio_req *grp);
		117	#define EIO_DESTROY(req) req_destroy (req)
		118
32	enum {	119	enum {
33	REQ_QUIT,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
34	REQ_OPEN, REQ_CLOSE,
35	REQ_READ, REQ_WRITE, REQ_READAHEAD,
36	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
37	REQ_FSYNC, REQ_FDATASYNC,
38	};	121	};
39		122
40	typedef struct aio_cb {	123	#include "libeio/eio.c"
41	struct aio_cb *volatile next;
42		124
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;
53	STRLEN dataoffset;
54
55	Stat_t *statdata;
56	} aio_cb;
57
58	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
		126	typedef eio_req *aio_req_ornot;
59		127
60	static int started;	128	static SV *on_next_submit;
61	static volatile int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	130	static int max_outstanding;
63	static int respipe [2];
64		131
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68		133
69	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
70	static volatile aio_req ress, rese; /* queue start, queue end */	135	static void req_cancel (aio_req req);
71		136
72	static void	137	static void want_poll (void)
73	poll_wait ()
74	{	138	{
75	if (nreqs && !ress)	139	/* write a dummy byte to the pipe so fh becomes ready */
		140	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		141	}
		142
		143	static void done_poll (void)
		144	{
		145	/* read any signals sent by the worker threads */
		146	char buf [4];
		147	while (respipe_read (respipe [0], buf, 4) == 4)
		148	;
		149	}
		150
		151	/* must be called at most once */
		152	static SV *req_sv (aio_req req, const char *klass)
		153	{
		154	if (!req->self)
76	{	155	{
77	fd_set rfd;	156	req->self = (SV *)newHV ();
78	FD_ZERO(&rfd);	157	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
79	FD_SET(respipe [0], &rfd);
80
81	select (respipe [0] + 1, &rfd, 0, 0, 0);
82	}	158	}
83	}
84		159
85	static int	160	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
86	poll_cb ()	161	}
		162
		163	static aio_req SvAIO_REQ (SV *sv)
		164	{
		165	MAGIC *mg;
		166
		167	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		168	croak ("object of class " AIO_REQ_KLASS " expected");
		169
		170	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		171
		172	return mg ? (aio_req)mg->mg_ptr : 0;
		173	}
		174
		175	static void aio_grp_feed (aio_req grp)
		176	{
		177	if (grp->sv2 && SvOK (grp->sv2))
		178	{
		179	dSP;
		180
		181	ENTER;
		182	SAVETMPS;
		183	PUSHMARK (SP);
		184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		185	PUTBACK;
		186	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		187	SPAGAIN;
		188	FREETMPS;
		189	LEAVE;
		190	}
		191	}
		192
		193	static void req_submit (eio_req *req)
		194	{
		195	eio_submit (req);
		196
		197	if (expect_false (on_next_submit))
		198	{
		199	dSP;
		200	SV *cb = sv_2mortal (on_next_submit);
		201
		202	on_next_submit = 0;
		203
		204	PUSHMARK (SP);
		205	PUTBACK;
		206	call_sv (cb, G_DISCARD | G_EVAL);
		207	}
		208	}
		209
		210	static int req_invoke (eio_req *req)
87	{	211	{
88	dSP;	212	dSP;
89	int count = 0;
90	aio_req req, prv;
91		213
92	pthread_mutex_lock (&reslock);	214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
93		216
94	{	217	if (!EIO_CANCELLED (req) && req->callback)
95	/* read any signals sent by the worker threads */
96	char buf [32];
97	while (read (respipe [0], buf, 32) > 0)
98	;
99	}
100
101	req = ress;
102	ress = rese = 0;
103
104	pthread_mutex_unlock (&reslock);
105
106	while (req)
107	{	218	{
108	nreqs--;	219	ENTER;
		220	SAVETMPS;
		221	PUSHMARK (SP);
		222	EXTEND (SP, 1);
109		223
110	if (req->type == REQ_QUIT)	224	switch (req->type)
111	started--;
112	else
113	{	225	{
114	int errorno = errno;	226	case EIO_READDIR:
115	errno = req->errorno;
116
117	if (req->type == REQ_READ)
118	SvCUR_set (req->data, req->dataoffset
119	+ req->result > 0 ? req->result : 0);
120
121	if (req->data)
122	SvREFCNT_dec (req->data);
123
124	if (req->fh)
125	SvREFCNT_dec (req->fh);
126
127	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
128	{	227	{
129	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	228	SV *rv = &PL_sv_undef;
130	PL_laststatval = req->result;
131	PL_statcache = *(req->statdata);
132		229
133	Safefree (req->statdata);	230	if (req->result >= 0)
		231	{
		232	int i;
		233	char *buf = req->ptr2;
		234	AV *av = newAV ();
		235
		236	av_extend (av, req->result - 1);
		237
		238	for (i = 0; i < req->result; ++i)
		239	{
		240	if (req->int1 & EIO_READDIR_DENTS)
		241	{
		242	eio_dirent *ent = (eio_dirent *)buf;
		243	SV *namesv = newSVpvn (ent->name, ent->namelen);
		244
		245	if (req->int1 & EIO_READDIR_CUSTOM2)
		246	{
		247	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		248	AV *avent = newAV ();
		249
		250	av_extend (avent, 2);
		251
		252	if (!sv_type [ent->type])
		253	{
		254	sv_type [ent->type] = newSViv (ent->type);
		255	SvREADONLY_on (sv_type [ent->type]);
		256	}
		257
		258	av_store (avent, 0, namesv);
		259	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		260	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		261
		262	av_store (av, i, newRV_noinc ((SV *)avent));
		263	}
		264	else
		265	av_store (av, i, namesv);
		266
		267	buf += sizeof (eio_dirent);
		268	}
		269	else
		270	{
		271	SV *name = newSVpv (buf, 0);
		272	av_store (av, i, name);
		273	buf += SvCUR (name) + 1;
		274	}
		275	}
		276
		277	rv = sv_2mortal (newRV_noinc ((SV *)av));
		278	}
		279
		280	PUSHs (rv);
		281
		282	if (req->int1 & EIO_READDIR_CUSTOM1)
		283	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
134	}	284	}
		285	break;
135		286
136	ENTER;	287	case EIO_OPEN:
137	PUSHMARK (SP);
138	XPUSHs (sv_2mortal (newSViv (req->result)));
139
140	if (req->type == REQ_OPEN)
141	{	288	{
142	/* convert fd to fh */	289	/* convert fd to fh */
143	SV *fh;	290	SV *fh = &PL_sv_undef;
144		291
145	PUTBACK;	292	if (req->result >= 0)
146	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	293	{
147	SPAGAIN;	294	GV *gv = (GV *)sv_newmortal ();
		295	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		296	char sym [64];
		297	int symlen;
		298
		299	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		300	gv_init (gv, stash, sym, symlen, 0);
148		301
149	fh = SvREFCNT_inc (POPs);	302	symlen = snprintf (
		303	sym,
		304	sizeof (sym),
		305	"%s&=%d",
		306	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		307	req->result
		308	);
150		309
		310	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		311	fh = (SV *)gv;
		312	}
		313
151	PUSHMARK (SP);	314	PUSHs (fh);
152	XPUSHs (sv_2mortal (fh));
153	}	315	}
		316	break;
154		317
155	if (SvOK (req->callback))	318	case EIO_GROUP:
		319	req->int1 = 2; /* mark group as finished */
		320
		321	if (req->sv1)
		322	{
		323	int i;
		324	AV *av = (AV *)req->sv1;
		325
		326	EXTEND (SP, AvFILL (av) + 1);
		327	for (i = 0; i <= AvFILL (av); ++i)
		328	PUSHs (*av_fetch (av, i, 0));
		329	}
		330	break;
		331
		332	case EIO_NOP:
		333	case EIO_BUSY:
		334	break;
		335
		336	case EIO_READLINK:
		337	if (req->result > 0)
		338	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		339	break;
		340
		341	case EIO_STAT:
		342	case EIO_LSTAT:
		343	case EIO_FSTAT:
		344	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		345	PL_laststatval = req->result;
		346	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		347	PUSHs (sv_2mortal (newSViv (req->result)));
		348	break;
		349
		350	case EIO_READ:
156	{	351	{
157	PUTBACK;	352	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
158	call_sv (req->callback, G_VOID | G_EVAL);	353	*SvEND (req->sv2) = 0;
159	SPAGAIN;	354	SvPOK_only (req->sv2);
		355	SvSETMAGIC (req->sv2);
		356	PUSHs (sv_2mortal (newSViv (req->result)));
160	}	357	}
161
162	LEAVE;
163
164	if (req->callback)
165	SvREFCNT_dec (req->callback);
166
167	errno = errorno;
168	count++;
169	}
170
171	prv = req;
172	req = req->next;
173	Safefree (prv);
174
175	/* TODO: croak on errors? */
176	}
177
178	return count;
179	}
180
181	static void *aio_proc(void *arg);
182
183	static void
184	start_thread (void)
185	{
186	sigset_t fullsigset, oldsigset;
187	pthread_t tid;
188	pthread_attr_t attr;
189
190	pthread_attr_init (&attr);
191	pthread_attr_setstacksize (&attr, STACKSIZE);
192	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
193
194	sigfillset (&fullsigset);
195	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
196
197	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
198	started++;
199
200	sigprocmask (SIG_SETMASK, &oldsigset, 0);
201	}
202
203	static void
204	send_req (aio_req req)
205	{
206	nreqs++;
207
208	pthread_mutex_lock (&reqlock);
209
210	req->next = 0;
211
212	if (reqe)
213	{
214	reqe->next = req;
215	reqe = req;
216	}
217	else
218	reqe = reqs = req;
219
220	pthread_cond_signal (&reqwait);
221	pthread_mutex_unlock (&reqlock);
222
223	while (nreqs > max_outstanding)
224	{
225	poll_wait ();
226	poll_cb ();
227	}
228	}
229
230	static void
231	end_thread (void)
232	{
233	aio_req req;
234	New (0, req, 1, aio_cb);
235	req->type = REQ_QUIT;
236
237	send_req (req);
238	}
239
240	/* work around various missing functions */
241
242	#if !HAVE_PREADWRITE
243	# define pread aio_pread
244	# define pwrite aio_pwrite
245
246	/*
247	* make our pread/pwrite safe against themselves, but not against
248	* normal read/write by using a mutex. slows down execution a lot,
249	* but that's your problem, not mine.
250	*/
251	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
252
253	static ssize_t
254	pread (int fd, void *buf, size_t count, off_t offset)
255	{
256	ssize_t res;
257	off_t ooffset;
258
259	pthread_mutex_lock (&iolock);
260	ooffset = lseek (fd, 0, SEEK_CUR);
261	lseek (fd, offset, SEEK_SET);
262	res = read (fd, buf, count);
263	lseek (fd, ooffset, SEEK_SET);
264	pthread_mutex_unlock (&iolock);
265
266	return res;
267	}
268
269	static ssize_t
270	pwrite (int fd, void *buf, size_t count, off_t offset)
271	{
272	ssize_t res;
273	off_t ooffset;
274
275	pthread_mutex_lock (&iolock);
276	ooffset = lseek (fd, 0, SEEK_CUR);
277	lseek (fd, offset, SEEK_SET);
278	res = write (fd, buf, count);
279	lseek (fd, offset, SEEK_SET);
280	pthread_mutex_unlock (&iolock);
281
282	return res;
283	}
284	#endif
285
286	#if !HAVE_FDATASYNC
287	# define fdatasync fsync
288	#endif
289
290	#if !HAVE_READAHEAD
291	# define readahead aio_readahead
292
293	static char readahead_buf[4096];
294
295	static ssize_t
296	readahead (int fd, off_t offset, size_t count)
297	{
298	while (count > 0)
299	{
300	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
301
302	pread (fd, readahead_buf, len, offset);
303	offset += len;
304	count -= len;
305	}
306
307	errno = 0;
308	}
309	#endif
310
311	static void *
312	aio_proc (void *thr_arg)
313	{
314	aio_req req;
315	int type;
316
317	do
318	{
319	pthread_mutex_lock (&reqlock);
320
321	for (;;)
322	{
323	req = reqs;
324
325	if (reqs)
326	{
327	reqs = reqs->next;
328	if (!reqs) reqe = 0;
329	}
330
331	if (req)
332	break;	358	break;
333		359
334	pthread_cond_wait (&reqwait, &reqlock);
335	}
336
337	pthread_mutex_unlock (&reqlock);
338
339	errno = 0; /* strictly unnecessary */
340
341	type = req->type;
342
343	switch (type)
344	{
345	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
346	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
347
348	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
349
350	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
351	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
352	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
353
354	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
355	case REQ_CLOSE: req->result = close (req->fd); break;
356	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
357
358	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
359	case REQ_FSYNC: req->result = fsync (req->fd); break;
360
361	case REQ_QUIT:	360	case EIO_DUP2:
362	break;	361	if (req->result > 0)
		362	req->result = 0;
		363	/* FALLTHROUGH */
363		364
364	default:	365	default:
365	req->result = ENOSYS;	366	PUSHs (sv_2mortal (newSViv (req->result)));
366	break;	367	break;
367	}	368	}
368		369
369	req->errorno = errno;	370	errno = req->errorno;
370		371
371	pthread_mutex_lock (&reslock);	372	PUTBACK;
		373	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		374	SPAGAIN;
372		375
373	req->next = 0;	376	FREETMPS;
		377	LEAVE;
374		378
375	if (rese)	379	PUTBACK;
376	{
377	rese->next = req;
378	rese = req;
379	}
380	else
381	{
382	rese = ress = req;
383
384	/* write a dummy byte to the pipe so fh becomes ready */
385	write (respipe [1], &respipe, 1);
386	}
387
388	pthread_mutex_unlock (&reslock);
389	}	380	}
390	while (type != REQ_QUIT);
391		381
		382	return !!SvTRUE (ERRSV);
		383	}
		384
		385	static void req_destroy (aio_req req)
		386	{
		387	if (req->self)
		388	{
		389	sv_unmagic (req->self, PERL_MAGIC_ext);
		390	SvREFCNT_dec (req->self);
		391	}
		392
		393	SvREFCNT_dec (req->sv1);
		394	SvREFCNT_dec (req->sv2);
		395	SvREFCNT_dec (req->callback);
		396
		397	Safefree (req);
		398	}
		399
		400	static void req_cancel_subs (aio_req grp)
		401	{
		402	aio_req sub;
		403
		404	if (grp->type != EIO_GROUP)
		405	return;
		406
		407	SvREFCNT_dec (grp->sv2);
		408	grp->sv2 = 0;
		409
		410	eio_grp_cancel (grp);
		411	}
		412
		413	#ifdef USE_SOCKETS_AS_HANDLES
		414	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		415	#else
		416	# define TO_SOCKET(x) (x)
		417	#endif
		418
		419	static void
		420	create_respipe (void)
		421	{
		422	int old_readfd = respipe [0];
		423
		424	if (respipe [1] >= 0)
		425	respipe_close (TO_SOCKET (respipe [1]));
		426
		427	#ifdef _WIN32
		428	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		429	#else
		430	if (pipe (respipe))
		431	#endif
		432	croak ("unable to initialize result pipe");
		433
		434	if (old_readfd >= 0)
		435	{
		436	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		437	croak ("unable to initialize result pipe(2)");
		438
		439	respipe_close (respipe [0]);
		440	respipe [0] = old_readfd;
		441	}
		442
		443	#ifdef _WIN32
		444	int arg = 1;
		445	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		446	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		447	#else
		448	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		449	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		450	#endif
		451	croak ("unable to initialize result pipe(3)");
		452
		453	respipe_osf [0] = TO_SOCKET (respipe [0]);
		454	respipe_osf [1] = TO_SOCKET (respipe [1]);
		455	}
		456
		457	static void poll_wait (void)
		458	{
		459	fd_set rfd;
		460
		461	while (eio_nreqs ())
		462	{
		463	int size;
		464
		465	X_LOCK (reslock);
		466	size = res_queue.size;
		467	X_UNLOCK (reslock);
		468
		469	if (size)
		470	return;
		471
		472	etp_maybe_start_thread ();
		473
		474	FD_ZERO (&rfd);
		475	FD_SET (respipe [0], &rfd);
		476
		477	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		478	}
		479	}
		480
		481	static int poll_cb (void)
		482	{
		483	for (;;)
		484	{
		485	int res = eio_poll ();
		486
		487	if (res > 0)
		488	croak (0);
		489
		490	if (!max_outstanding || max_outstanding > eio_nreqs ())
		491	return res;
		492
		493	poll_wait ();
		494	}
		495	}
		496
		497	static void atfork_child (void)
		498	{
		499	create_respipe ();
		500	}
		501
		502	static SV *
		503	get_cb (SV *cb_sv)
		504	{
		505	HV *st;
		506	GV *gvp;
		507	CV *cv;
		508
		509	if (!SvOK (cb_sv))
392	return 0;	510	return 0;
		511
		512	cv = sv_2cv (cb_sv, &st, &gvp, 0);
		513
		514	if (!cv)
		515	croak ("IO::AIO callback must be undef or a CODE reference");
		516
		517	return (SV *)cv;
		518	}
		519
		520	#define dREQ \
		521	SV *cb_cv; \
		522	aio_req req; \
		523	int req_pri = next_pri; \
		524	next_pri = EIO_PRI_DEFAULT; \
		525	\
		526	cb_cv = get_cb (callback); \
		527	\
		528	Newz (0, req, 1, eio_req); \
		529	if (!req) \
		530	croak ("out of memory during eio_req allocation"); \
		531	\
		532	req->callback = SvREFCNT_inc (cb_cv); \
		533	req->pri = req_pri
		534
		535	#define REQ_SEND \
		536	PUTBACK; \
		537	req_submit (req); \
		538	SPAGAIN; \
		539	\
		540	if (GIMME_V != G_VOID) \
		541	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		542
		543	static int
		544	extract_fd (SV *fh, int wr)
		545	{
		546	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		547
		548	if (fd < 0)
		549	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		550
		551	return fd;
393	}	552	}
394		553
395	MODULE = IO::AIO PACKAGE = IO::AIO	554	MODULE = IO::AIO PACKAGE = IO::AIO
396		555
397	PROTOTYPES: ENABLE	556	PROTOTYPES: ENABLE
398		557
399	BOOT:	558	BOOT:
400	{	559	{
401	if (pipe (respipe))	560	stash = gv_stashpv ("IO::AIO", 1);
402	croak ("unable to initialize result pipe");
403		561
404	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	562	static const struct {
405	croak ("cannot set result pipe to nonblocking mode");	563	const char *name;
		564	IV iv;
		565	} *civ, const_iv[] = {
		566	# define const_iv(name, value) { # name, (IV) value },
		567	# define const_eio(name) { # name, (IV) EIO_ ## name },
		568	const_iv (EXDEV , EXDEV)
		569	const_iv (ENOSYS , ENOSYS)
		570	const_iv (O_RDONLY, O_RDONLY)
		571	const_iv (O_WRONLY, O_WRONLY)
		572	const_iv (O_CREAT , O_CREAT)
		573	const_iv (O_TRUNC , O_TRUNC)
		574	#ifndef _WIN32
		575	const_iv (S_IFIFO , S_IFIFO)
		576	#endif
		577	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		578	const_eio (SYNC_FILE_RANGE_WRITE)
		579	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
406		580
407	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	581	const_eio (READDIR_DENTS)
408	croak ("cannot set result pipe to nonblocking mode");	582	const_eio (READDIR_DIRS_FIRST)
409	}	583	const_eio (READDIR_STAT_ORDER)
		584	const_eio (READDIR_FOUND_UNKNOWN)
410		585
		586	const_eio (DT_UNKNOWN)
		587	const_eio (DT_FIFO)
		588	const_eio (DT_CHR)
		589	const_eio (DT_DIR)
		590	const_eio (DT_BLK)
		591	const_eio (DT_REG)
		592	const_eio (DT_LNK)
		593	const_eio (DT_SOCK)
		594	const_eio (DT_WHT)
		595	};
		596
		597	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		598	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
		599
		600	create_respipe ();
		601
		602	if (eio_init (want_poll, done_poll) < 0)
		603	croak ("IO::AIO: unable to initialise eio library");
		604
		605	/* atfork child called in fifo order, so before eio's handler */
		606	X_THREAD_ATFORK (0, 0, atfork_child);
		607	}
		608
411	void	609	void
412	min_parallel(nthreads)	610	max_poll_reqs (int nreqs)
413	int nthreads
414	PROTOTYPE: $	611	PROTOTYPE: $
415	CODE:	612	CODE:
416	while (nthreads > started)	613	eio_set_max_poll_reqs (nreqs);
417	start_thread ();
418		614
419	void	615	void
420	max_parallel(nthreads)	616	max_poll_time (double nseconds)
421	int nthreads
422	PROTOTYPE: $	617	PROTOTYPE: $
423	CODE:	618	CODE:
		619	eio_set_max_poll_time (nseconds);
		620
		621	void
		622	min_parallel (int nthreads)
		623	PROTOTYPE: $
		624	CODE:
		625	eio_set_min_parallel (nthreads);
		626
		627	void
		628	max_parallel (int nthreads)
		629	PROTOTYPE: $
		630	CODE:
		631	eio_set_max_parallel (nthreads);
		632
		633	void
		634	max_idle (int nthreads)
		635	PROTOTYPE: $
		636	CODE:
		637	eio_set_max_idle (nthreads);
		638
		639	void
		640	max_outstanding (int maxreqs)
		641	PROTOTYPE: $
		642	CODE:
		643	max_outstanding = maxreqs;
		644
		645	void
		646	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		647	PROTOTYPE: $$$;$
		648	PPCODE:
424	{	649	{
425	int cur = started;	650	dREQ;
426	while (cur > nthreads)	651
427	{	652	req->type = EIO_OPEN;
428	end_thread ();	653	req->sv1 = newSVsv (pathname);
		654	req->ptr1 = SvPVbyte_nolen (req->sv1);
		655	req->int1 = flags;
		656	req->int2 = mode;
		657
		658	REQ_SEND;
		659	}
		660
		661	void
		662	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		663	PROTOTYPE: $;$
		664	ALIAS:
		665	aio_fsync = EIO_FSYNC
		666	aio_fdatasync = EIO_FDATASYNC
		667	PPCODE:
		668	{
		669	int fd = extract_fd (fh, 0);
		670	dREQ;
		671
		672	req->type = ix;
		673	req->sv1 = newSVsv (fh);
		674	req->int1 = fd;
		675
		676	REQ_SEND (req);
		677	}
		678
		679	void
		680	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		681	PROTOTYPE: $$$$;$
		682	PPCODE:
		683	{
		684	int fd = extract_fd (fh, 0);
		685	dREQ;
		686
		687	req->type = EIO_SYNC_FILE_RANGE;
		688	req->sv1 = newSVsv (fh);
		689	req->int1 = fd;
		690	req->offs = SvVAL64 (offset);
		691	req->size = SvVAL64 (nbytes);
		692	req->int2 = flags;
		693
		694	REQ_SEND (req);
		695	}
		696
		697	void
		698	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		699	PROTOTYPE: $;$
		700	PPCODE:
		701	{
		702	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		703	int fd = extract_fd (fh, 0);
		704	dREQ;
		705
		706	if (close_pipe < 0)
		707	{
		708	int pipefd [2];
		709
		710	if (pipe (pipefd) < 0
		711	|| close (pipefd [1]) < 0
		712	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		713	abort (); /*D*/
		714
		715	close_pipe = pipefd [0];
		716	}
		717
		718	req->type = EIO_DUP2;
		719	req->int1 = close_pipe;
		720	req->sv2 = newSVsv (fh);
		721	req->int2 = fd;
		722
		723	REQ_SEND (req);
		724	}
		725
		726	void
		727	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		728	ALIAS:
		729	aio_read = EIO_READ
		730	aio_write = EIO_WRITE
		731	PROTOTYPE: $$$$$;$
		732	PPCODE:
		733	{
		734	STRLEN svlen;
		735	int fd = extract_fd (fh, ix == EIO_WRITE);
		736	char *svptr = SvPVbyte (data, svlen);
		737	UV len = SvUV (length);
		738
		739	if (dataoffset < 0)
		740	dataoffset += svlen;
		741
		742	if (dataoffset < 0 || dataoffset > svlen)
		743	croak ("dataoffset outside of data scalar");
		744
		745	if (ix == EIO_WRITE)
		746	{
		747	/* write: check length and adjust. */
		748	if (!SvOK (length) || len + dataoffset > svlen)
		749	len = svlen - dataoffset;
		750	}
		751	else
		752	{
		753	/* read: check type and grow scalar as necessary */
		754	SvUPGRADE (data, SVt_PV);
		755	svptr = SvGROW (data, len + dataoffset + 1);
		756	}
		757
		758	{
		759	dREQ;
		760
		761	req->type = ix;
		762	req->sv1 = newSVsv (fh);
		763	req->int1 = fd;
		764	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		765	req->size = len;
		766	req->sv2 = SvREFCNT_inc (data);
		767	req->ptr2 = (char *)svptr + dataoffset;
		768	req->stroffset = dataoffset;
		769
		770	if (!SvREADONLY (data))
429	cur--;	771	{
		772	SvREADONLY_on (data);
		773	req->flags |= FLAG_SV2_RO_OFF;
430	}	774	}
431		775
432	while (started > nthreads)	776	REQ_SEND;
		777	}
		778	}
		779
		780	void
		781	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		782	PROTOTYPE: $$;$
		783	PPCODE:
		784	{
		785	SV *data;
		786	dREQ;
		787
		788	req->type = EIO_READLINK;
		789	req->sv1 = newSVsv (path);
		790	req->ptr1 = SvPVbyte_nolen (req->sv1);
		791
		792	REQ_SEND;
		793	}
		794
		795	void
		796	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		797	PROTOTYPE: $$$$;$
		798	PPCODE:
		799	{
		800	int ifd = extract_fd (in_fh , 0);
		801	int ofd = extract_fd (out_fh, 0);
		802	dREQ;
		803
		804	req->type = EIO_SENDFILE;
		805	req->sv1 = newSVsv (out_fh);
		806	req->int1 = ofd;
		807	req->sv2 = newSVsv (in_fh);
		808	req->int2 = ifd;
		809	req->offs = SvVAL64 (in_offset);
		810	req->size = length;
		811
		812	REQ_SEND;
		813	}
		814
		815	void
		816	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
		817	PROTOTYPE: $$$;$
		818	PPCODE:
		819	{
		820	int fd = extract_fd (fh, 0);
		821	dREQ;
		822
		823	req->type = EIO_READAHEAD;
		824	req->sv1 = newSVsv (fh);
		825	req->int1 = fd;
		826	req->offs = SvVAL64 (offset);
		827	req->size = length;
		828
		829	REQ_SEND;
		830	}
		831
		832	void
		833	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		834	ALIAS:
		835	aio_stat = EIO_STAT
		836	aio_lstat = EIO_LSTAT
		837	PPCODE:
		838	{
		839	dREQ;
		840
		841	req->sv1 = newSVsv (fh_or_path);
		842
		843	if (SvPOK (req->sv1))
		844	{
		845	req->type = ix;
		846	req->ptr1 = SvPVbyte_nolen (req->sv1);
		847	}
		848	else
		849	{
		850	req->type = EIO_FSTAT;
		851	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		852	}
		853
		854	REQ_SEND;
		855	}
		856
		857	void
		858	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		859	PPCODE:
		860	{
		861	dREQ;
		862
		863	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		864	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		865	req->sv1 = newSVsv (fh_or_path);
		866
		867	if (SvPOK (req->sv1))
		868	{
		869	req->type = EIO_UTIME;
		870	req->ptr1 = SvPVbyte_nolen (req->sv1);
		871	}
		872	else
		873	{
		874	req->type = EIO_FUTIME;
		875	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		876	}
		877
		878	REQ_SEND;
		879	}
		880
		881	void
		882	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		883	PPCODE:
		884	{
		885	dREQ;
		886
		887	req->sv1 = newSVsv (fh_or_path);
		888	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		889
		890	if (SvPOK (req->sv1))
		891	{
		892	req->type = EIO_TRUNCATE;
		893	req->ptr1 = SvPVbyte_nolen (req->sv1);
		894	}
		895	else
		896	{
		897	req->type = EIO_FTRUNCATE;
		898	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		899	}
		900
		901	REQ_SEND;
		902	}
		903
		904	void
		905	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		906	ALIAS:
		907	aio_chmod = EIO_CHMOD
		908	aio_mkdir = EIO_MKDIR
		909	PPCODE:
		910	{
		911	dREQ;
		912
		913	req->int2 = mode;
		914	req->sv1 = newSVsv (fh_or_path);
		915
		916	if (SvPOK (req->sv1))
		917	{
		918	req->type = ix;
		919	req->ptr1 = SvPVbyte_nolen (req->sv1);
		920	}
		921	else
		922	{
		923	req->type = EIO_FCHMOD;
		924	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		925	}
		926
		927	REQ_SEND;
		928	}
		929
		930	void
		931	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		932	PPCODE:
		933	{
		934	dREQ;
		935
		936	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		937	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		938	req->sv1 = newSVsv (fh_or_path);
		939
		940	if (SvPOK (req->sv1))
		941	{
		942	req->type = EIO_CHOWN;
		943	req->ptr1 = SvPVbyte_nolen (req->sv1);
		944	}
		945	else
		946	{
		947	req->type = EIO_FCHOWN;
		948	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		949	}
		950
		951	REQ_SEND;
		952	}
		953
		954	void
		955	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		956	PPCODE:
		957	{
		958	dREQ;
		959
		960	req->type = EIO_READDIR;
		961	req->sv1 = newSVsv (pathname);
		962	req->ptr1 = SvPVbyte_nolen (req->sv1);
		963	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		964
		965	if (flags & EIO_READDIR_DENTS)
		966	req->int1 |= EIO_READDIR_CUSTOM2;
		967
		968	REQ_SEND;
		969	}
		970
		971	void
		972	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		973	ALIAS:
		974	aio_unlink = EIO_UNLINK
		975	aio_rmdir = EIO_RMDIR
		976	aio_readdir = EIO_READDIR
		977	PPCODE:
		978	{
		979	dREQ;
		980
		981	req->type = ix;
		982	req->sv1 = newSVsv (pathname);
		983	req->ptr1 = SvPVbyte_nolen (req->sv1);
		984
		985	REQ_SEND;
		986	}
		987
		988	void
		989	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		990	ALIAS:
		991	aio_link = EIO_LINK
		992	aio_symlink = EIO_SYMLINK
		993	aio_rename = EIO_RENAME
		994	PPCODE:
		995	{
		996	dREQ;
		997
		998	req->type = ix;
		999	req->sv1 = newSVsv (oldpath);
		1000	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1001	req->sv2 = newSVsv (newpath);
		1002	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1003
		1004	REQ_SEND;
		1005	}
		1006
		1007	void
		1008	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1009	PPCODE:
		1010	{
		1011	dREQ;
		1012
		1013	req->type = EIO_MKNOD;
		1014	req->sv1 = newSVsv (pathname);
		1015	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1016	req->int2 = (mode_t)mode;
		1017	req->offs = dev;
		1018
		1019	REQ_SEND;
		1020	}
		1021
		1022	void
		1023	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1024	PPCODE:
		1025	{
		1026	dREQ;
		1027
		1028	req->type = EIO_BUSY;
		1029	req->nv1 = delay < 0. ? 0. : delay;
		1030
		1031	REQ_SEND;
		1032	}
		1033
		1034	void
		1035	aio_group (SV *callback=&PL_sv_undef)
		1036	PROTOTYPE: ;$
		1037	PPCODE:
		1038	{
		1039	dREQ;
		1040
		1041	req->type = EIO_GROUP;
		1042
		1043	req_submit (req);
		1044	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1045	}
		1046
		1047	void
		1048	aio_nop (SV *callback=&PL_sv_undef)
		1049	ALIAS:
		1050	aio_nop = EIO_NOP
		1051	aio_sync = EIO_SYNC
		1052	PPCODE:
		1053	{
		1054	dREQ;
		1055
		1056	req->type = ix;
		1057
		1058	REQ_SEND;
		1059	}
		1060
		1061	int
		1062	aioreq_pri (int pri = 0)
		1063	PROTOTYPE: ;$
		1064	CODE:
		1065	RETVAL = next_pri;
		1066	if (items > 0)
		1067	{
		1068	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1069	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1070	next_pri = pri;
		1071	}
		1072	OUTPUT:
		1073	RETVAL
		1074
		1075	void
		1076	aioreq_nice (int nice = 0)
		1077	CODE:
		1078	nice = next_pri - nice;
		1079	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1080	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1081	next_pri = nice;
		1082
		1083	void
		1084	flush ()
		1085	PROTOTYPE:
		1086	CODE:
		1087	while (eio_nreqs ())
433	{	1088	{
434	poll_wait ();	1089	poll_wait ();
435	poll_cb ();	1090	poll_cb ();
436	}	1091	}
437	}
438		1092
439	int	1093	int
440	max_outstanding(nreqs)
441	int nreqs
442	PROTOTYPE: $
443	CODE:
444	RETVAL = max_outstanding;
445	max_outstanding = nreqs;
446
447	void
448	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
449	SV * pathname
450	int flags
451	int mode
452	SV * callback
453	PROTOTYPE: $$$;$
454	CODE:
455	{
456	aio_req req;
457
458	Newz (0, req, 1, aio_cb);
459
460	if (!req)
461	croak ("out of memory during aio_req allocation");
462
463	req->type = REQ_OPEN;
464	req->data = newSVsv (pathname);
465	req->dataptr = SvPV_nolen (req->data);
466	req->fd = flags;
467	req->mode = mode;
468	req->callback = SvREFCNT_inc (callback);
469
470	send_req (req);
471	}
472
473	void
474	aio_close(fh,callback=&PL_sv_undef)
475	SV * fh
476	SV * callback
477	PROTOTYPE: $;$
478	ALIAS:
479	aio_close = REQ_CLOSE
480	aio_fsync = REQ_FSYNC
481	aio_fdatasync = REQ_FDATASYNC
482	CODE:
483	{
484	aio_req req;
485
486	Newz (0, req, 1, aio_cb);
487
488	if (!req)
489	croak ("out of memory during aio_req allocation");
490
491	req->type = ix;
492	req->fh = newSVsv (fh);
493	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
494	req->callback = SvREFCNT_inc (callback);
495
496	send_req (req);
497	}
498
499	void
500	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
501	SV * fh
502	UV offset
503	IV length
504	SV * data
505	IV dataoffset
506	SV * callback
507	ALIAS:
508	aio_read = REQ_READ
509	aio_write = REQ_WRITE
510	PROTOTYPE: $$$$$;$
511	CODE:
512	{
513	aio_req req;
514	STRLEN svlen;
515	char *svptr = SvPV (data, svlen);
516
517	SvUPGRADE (data, SVt_PV);
518	SvPOK_on (data);
519
520	if (dataoffset < 0)
521	dataoffset += svlen;
522
523	if (dataoffset < 0 || dataoffset > svlen)
524	croak ("data offset outside of string");
525
526	if (ix == REQ_WRITE)
527	{
528	/* write: check length and adjust. */
529	if (length < 0 || length + dataoffset > svlen)
530	length = svlen - dataoffset;
531	}
532	else
533	{
534	/* read: grow scalar as necessary */
535	svptr = SvGROW (data, length + dataoffset);
536	}
537
538	if (length < 0)
539	croak ("length must not be negative");
540
541	Newz (0, req, 1, aio_cb);
542
543	if (!req)
544	croak ("out of memory during aio_req allocation");
545
546	req->type = ix;
547	req->fh = newSVsv (fh);
548	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
549	: IoOFP (sv_2io (fh)));
550	req->offset = offset;
551	req->length = length;
552	req->data = SvREFCNT_inc (data);
553	req->dataptr = (char *)svptr + dataoffset;
554	req->callback = SvREFCNT_inc (callback);
555
556	send_req (req);
557	}
558
559	void
560	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
561	SV * fh
562	UV offset
563	IV length
564	SV * callback
565	PROTOTYPE: $$$;$
566	CODE:
567	{
568	aio_req req;
569
570	if (length < 0)
571	croak ("length must not be negative");
572
573	Newz (0, req, 1, aio_cb);
574
575	if (!req)
576	croak ("out of memory during aio_req allocation");
577
578	req->type = REQ_READAHEAD;
579	req->fh = newSVsv (fh);
580	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
581	req->offset = offset;
582	req->length = length;
583	req->callback = SvREFCNT_inc (callback);
584
585	send_req (req);
586	}
587
588	void
589	aio_stat(fh_or_path,callback=&PL_sv_undef)
590	SV * fh_or_path
591	SV * callback
592	ALIAS:
593	aio_stat = REQ_STAT
594	aio_lstat = REQ_LSTAT
595	CODE:
596	{
597	aio_req req;
598
599	Newz (0, req, 1, aio_cb);
600
601	if (!req)
602	croak ("out of memory during aio_req allocation");
603
604	New (0, req->statdata, 1, Stat_t);
605
606	if (!req->statdata)
607	croak ("out of memory during aio_req->statdata allocation");
608
609	if (SvPOK (fh_or_path))
610	{
611	req->type = ix;
612	req->data = newSVsv (fh_or_path);
613	req->dataptr = SvPV_nolen (req->data);
614	}
615	else
616	{
617	req->type = REQ_FSTAT;
618	req->fh = newSVsv (fh_or_path);
619	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
620	}
621
622	req->callback = SvREFCNT_inc (callback);
623
624	send_req (req);
625	}
626
627	void
628	aio_unlink(pathname,callback=&PL_sv_undef)
629	SV * pathname
630	SV * callback
631	CODE:
632	{
633	aio_req req;
634
635	Newz (0, req, 1, aio_cb);
636
637	if (!req)
638	croak ("out of memory during aio_req allocation");
639
640	req->type = REQ_UNLINK;
641	req->data = newSVsv (pathname);
642	req->dataptr = SvPV_nolen (req->data);
643	req->callback = SvREFCNT_inc (callback);
644
645	send_req (req);
646	}
647
648	void
649	flush()
650	PROTOTYPE:
651	CODE:
652	while (nreqs)
653	{
654	poll_wait ();
655	poll_cb ();
656	}
657
658	void
659	poll()	1094	poll()
660	PROTOTYPE:	1095	PROTOTYPE:
661	CODE:	1096	CODE:
662	if (nreqs)
663	{
664	poll_wait ();	1097	poll_wait ();
665	poll_cb ();	1098	RETVAL = poll_cb ();
666	}	1099	OUTPUT:
		1100	RETVAL
667		1101
668	int	1102	int
669	poll_fileno()	1103	poll_fileno()
670	PROTOTYPE:	1104	PROTOTYPE:
671	CODE:	1105	CODE:
…		…
683		1117
684	void	1118	void
685	poll_wait()	1119	poll_wait()
686	PROTOTYPE:	1120	PROTOTYPE:
687	CODE:	1121	CODE:
688	if (nreqs)
689	poll_wait ();	1122	poll_wait ();
690		1123
691	int	1124	int
692	nreqs()	1125	nreqs()
693	PROTOTYPE:	1126	PROTOTYPE:
694	CODE:	1127	CODE:
695	RETVAL = nreqs;	1128	RETVAL = eio_nreqs ();
696	OUTPUT:	1129	OUTPUT:
697	RETVAL	1130	RETVAL
698		1131
		1132	int
		1133	nready()
		1134	PROTOTYPE:
		1135	CODE:
		1136	RETVAL = eio_nready ();
		1137	OUTPUT:
		1138	RETVAL
		1139
		1140	int
		1141	npending()
		1142	PROTOTYPE:
		1143	CODE:
		1144	RETVAL = eio_npending ();
		1145	OUTPUT:
		1146	RETVAL
		1147
		1148	int
		1149	nthreads()
		1150	PROTOTYPE:
		1151	CODE:
		1152	RETVAL = eio_nthreads ();
		1153	OUTPUT:
		1154	RETVAL
		1155
		1156	void _on_next_submit (SV *cb)
		1157	CODE:
		1158	SvREFCNT_dec (on_next_submit);
		1159	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1160
		1161	PROTOTYPES: DISABLE
		1162
		1163	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1164
		1165	void
		1166	cancel (aio_req_ornot req)
		1167	CODE:
		1168	eio_cancel (req);
		1169
		1170	void
		1171	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1172	PPCODE:
		1173	{
		1174	if (GIMME_V != G_VOID)
		1175	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1176
		1177	if (items > 1)
		1178	{
		1179	SV *cb_cv = get_cb (callback);
		1180
		1181	SvREFCNT_dec (req->callback);
		1182	req->callback = SvREFCNT_inc (cb_cv);
		1183	}
		1184	}
		1185
		1186	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1187
		1188	void
		1189	add (aio_req grp, ...)
		1190	PPCODE:
		1191	{
		1192	int i;
		1193
		1194	if (grp->int1 == 2)
		1195	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1196
		1197	for (i = 1; i < items; ++i )
		1198	{
		1199	aio_req req;
		1200
		1201	if (GIMME_V != G_VOID)
		1202	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1203
		1204	req = SvAIO_REQ (ST (i));
		1205
		1206	if (req)
		1207	eio_grp_add (grp, req);
		1208	}
		1209	}
		1210
		1211	void
		1212	cancel_subs (aio_req_ornot req)
		1213	CODE:
		1214	req_cancel_subs (req);
		1215
		1216	void
		1217	result (aio_req grp, ...)
		1218	CODE:
		1219	{
		1220	int i;
		1221	AV *av;
		1222
		1223	grp->errorno = errno;
		1224
		1225	av = newAV ();
		1226	av_extend (av, items - 1);
		1227
		1228	for (i = 1; i < items; ++i )
		1229	av_push (av, newSVsv (ST (i)));
		1230
		1231	SvREFCNT_dec (grp->sv1);
		1232	grp->sv1 = (SV *)av;
		1233	}
		1234
		1235	void
		1236	errno (aio_req grp, int errorno = errno)
		1237	CODE:
		1238	grp->errorno = errorno;
		1239
		1240	void
		1241	limit (aio_req grp, int limit)
		1242	CODE:
		1243	eio_grp_limit (grp, limit);
		1244
		1245	void
		1246	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1247	CODE:
		1248	{
		1249	SvREFCNT_dec (grp->sv2);
		1250	grp->sv2 = newSVsv (callback);
		1251	grp->feed = aio_grp_feed;
		1252
		1253	if (grp->int2 <= 0)
		1254	grp->int2 = 2;
		1255
		1256	eio_grp_limit (grp, grp->int2);
		1257	}
		1258

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