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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.24 by root, Wed Aug 17 03:01:56 2005 UTC vs.
Revision 1.136 by root, Sun Apr 19 13:15:55 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 SvVAL64 SvIV
		81	#else
		82	# define SvVAL64 SvNV
		83	#endif
		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
30	enum {	119	enum {
31	REQ_QUIT,	120	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	};	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, *data2ptr;
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_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69		133
70	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
71	static volatile aio_req ress, rese; /* queue start, queue end */	135	static void req_cancel (aio_req req);
72		136
73	static void	137	static void want_poll (void)
74	poll_wait ()
75	{	138	{
76	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)
77	{	155	{
78	fd_set rfd;	156	req->self = (SV *)newHV ();
79	FD_ZERO(&rfd);	157	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
80	FD_SET(respipe [0], &rfd);
81
82	select (respipe [0] + 1, &rfd, 0, 0, 0);
83	}	158	}
84	}
85		159
86	static int	160	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
87	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)
88	{	211	{
89	dSP;	212	dSP;
90	int count = 0;
91	int do_croak = 0;
92	aio_req req, prv;
93		213
94	pthread_mutex_lock (&reslock);	214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
95		216
96	{	217	if (!EIO_CANCELLED (req) && req->callback)
97	/* read any signals sent by the worker threads */
98	char buf [32];
99	while (read (respipe [0], buf, 32) == 32)
100	;
101	}
102
103	req = ress;
104	ress = rese = 0;
105
106	pthread_mutex_unlock (&reslock);
107
108	while (req)
109	{	218	{
110	nreqs--;	219	ENTER;
		220	SAVETMPS;
		221	PUSHMARK (SP);
		222	EXTEND (SP, 1);
111		223
112	if (req->type == REQ_QUIT)	224	switch (req->type)
113	started--;
114	else
115	{	225	{
116	int errorno = errno;	226	case EIO_READDIR:
117	errno = req->errorno;
118
119	if (req->type == REQ_READ)
120	SvCUR_set (req->data, req->dataoffset
121	+ req->result > 0 ? req->result : 0);
122
123	if (req->data)
124	SvREFCNT_dec (req->data);
125
126	if (req->fh)
127	SvREFCNT_dec (req->fh);
128
129	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
130	{	227	{
131	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	228	SV *rv = &PL_sv_undef;
132	PL_laststatval = req->result;
133	PL_statcache = *(req->statdata);
134		229
135	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	SV *sv = newSVpv (buf, 0);
		241
		242	av_store (av, i, sv);
		243	buf += SvCUR (sv) + 1;
		244	}
		245
		246	rv = sv_2mortal (newRV_noinc ((SV *)av));
		247	}
		248
		249	PUSHs (rv);
136	}	250	}
		251	break;
137		252
138	ENTER;	253	case EIO_OPEN:
139	PUSHMARK (SP);
140	XPUSHs (sv_2mortal (newSViv (req->result)));
141
142	if (req->type == REQ_OPEN)
143	{	254	{
144	/* convert fd to fh */	255	/* convert fd to fh */
145	SV *fh;	256	SV *fh = &PL_sv_undef;
146		257
147	PUTBACK;	258	if (req->result >= 0)
148	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	259	{
149	SPAGAIN;	260	GV *gv = (GV *)sv_newmortal ();
		261	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		262	char sym [64];
		263	int symlen;
		264
		265	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		266	gv_init (gv, stash, sym, symlen, 0);
150		267
151	fh = SvREFCNT_inc (POPs);	268	symlen = snprintf (
		269	sym,
		270	sizeof (sym),
		271	"%s&=%d",
		272	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		273	req->result
		274	);
152		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
153	PUSHMARK (SP);	280	PUSHs (fh);
154	XPUSHs (sv_2mortal (fh));
155	}	281	}
156
157	if (SvOK (req->callback))
158	{
159	PUTBACK;
160	call_sv (req->callback, G_VOID | G_EVAL);
161	SPAGAIN;
162	}
163
164	do_croak = SvTRUE (ERRSV);
165
166	LEAVE;
167
168	if (req->callback)
169	SvREFCNT_dec (req->callback);
170
171	errno = errorno;
172	count++;
173	}
174
175	prv = req;
176	req = req->next;
177	Safefree (prv);
178
179	if (do_croak)
180	croak (0);
181	}
182
183	return count;
184	}
185
186	static void *aio_proc(void *arg);
187
188	static void
189	start_thread (void)
190	{
191	sigset_t fullsigset, oldsigset;
192	pthread_t tid;
193	pthread_attr_t attr;
194
195	pthread_attr_init (&attr);
196	pthread_attr_setstacksize (&attr, STACKSIZE);
197	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
198
199	sigfillset (&fullsigset);
200	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
201
202	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
203	started++;
204
205	sigprocmask (SIG_SETMASK, &oldsigset, 0);
206	}
207
208	static void
209	send_req (aio_req req)
210	{
211	nreqs++;
212
213	pthread_mutex_lock (&reqlock);
214
215	req->next = 0;
216
217	if (reqe)
218	{
219	reqe->next = req;
220	reqe = req;
221	}
222	else
223	reqe = reqs = req;
224
225	pthread_cond_signal (&reqwait);
226	pthread_mutex_unlock (&reqlock);
227
228	while (nreqs > max_outstanding)
229	{
230	poll_wait ();
231	poll_cb ();
232	}
233	}
234
235	static void
236	end_thread (void)
237	{
238	aio_req req;
239	New (0, req, 1, aio_cb);
240	req->type = REQ_QUIT;
241
242	send_req (req);
243	}
244
245
246	static void min_parallel (int nthreads)
247	{
248	while (nthreads > started)
249	start_thread ();
250	}
251
252	static void max_parallel (int nthreads)
253	{
254	int cur = started;
255	while (cur > nthreads)
256	{
257	end_thread ();
258	cur--;
259	}
260
261	while (started > nthreads)
262	{
263	poll_wait ();
264	poll_cb ();
265	}
266	}
267
268	static int fork_started;
269
270	static void atfork_prepare (void)
271	{
272	pthread_mutex_lock (&frklock);
273
274	fork_started = started;
275
276	for (;;) {
277	while (nreqs)
278	{
279	poll_wait ();
280	poll_cb ();
281	}
282
283	max_parallel (0);
284
285	pthread_mutex_lock (&reqlock);
286
287	if (!nreqs && !started)
288	break;
289
290	pthread_mutex_unlock (&reqlock);
291
292	min_parallel (fork_started);
293	}
294
295	pthread_mutex_lock (&reslock);
296
297	assert (!started);
298	assert (!nreqs);
299	assert (!reqs && !reqe);
300	assert (!ress && !rese);
301	}
302
303	static void atfork_parent (void)
304	{
305	pthread_mutex_unlock (&reslock);
306	min_parallel (fork_started);
307	pthread_mutex_unlock (&reqlock);
308	pthread_mutex_unlock (&frklock);
309	}
310
311	static void atfork_child (void)
312	{
313	reqs = reqe = 0;
314
315	atfork_parent ();
316	}
317
318	/*****************************************************************************/
319	/* work around various missing functions */
320
321	#if !HAVE_PREADWRITE
322	# define pread aio_pread
323	# define pwrite aio_pwrite
324
325	/*
326	* make our pread/pwrite safe against themselves, but not against
327	* normal read/write by using a mutex. slows down execution a lot,
328	* but that's your problem, not mine.
329	*/
330	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
331
332	static ssize_t
333	pread (int fd, void *buf, size_t count, off_t offset)
334	{
335	ssize_t res;
336	off_t ooffset;
337
338	pthread_mutex_lock (&iolock);
339	ooffset = lseek (fd, 0, SEEK_CUR);
340	lseek (fd, offset, SEEK_SET);
341	res = read (fd, buf, count);
342	lseek (fd, ooffset, SEEK_SET);
343	pthread_mutex_unlock (&iolock);
344
345	return res;
346	}
347
348	static ssize_t
349	pwrite (int fd, void *buf, size_t count, off_t offset)
350	{
351	ssize_t res;
352	off_t ooffset;
353
354	pthread_mutex_lock (&iolock);
355	ooffset = lseek (fd, 0, SEEK_CUR);
356	lseek (fd, offset, SEEK_SET);
357	res = write (fd, buf, count);
358	lseek (fd, offset, SEEK_SET);
359	pthread_mutex_unlock (&iolock);
360
361	return res;
362	}
363	#endif
364
365	#if !HAVE_FDATASYNC
366	# define fdatasync fsync
367	#endif
368
369	#if !HAVE_READAHEAD
370	# define readahead aio_readahead
371
372	static char readahead_buf[4096];
373
374	static ssize_t
375	readahead (int fd, off_t offset, size_t count)
376	{
377	while (count > 0)
378	{
379	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
380
381	pread (fd, readahead_buf, len, offset);
382	offset += len;
383	count -= len;
384	}
385
386	errno = 0;
387	}
388	#endif
389
390	/*****************************************************************************/
391
392	static void *
393	aio_proc (void *thr_arg)
394	{
395	aio_req req;
396	int type;
397
398	do
399	{
400	pthread_mutex_lock (&reqlock);
401
402	for (;;)
403	{
404	req = reqs;
405
406	if (reqs)
407	{
408	reqs = reqs->next;
409	if (!reqs) reqe = 0;
410	}
411
412	if (req)
413	break;	282	break;
414		283
415	pthread_cond_wait (&reqwait, &reqlock);	284	case EIO_GROUP:
416	}	285	req->int1 = 2; /* mark group as finished */
417		286
418	pthread_mutex_unlock (&reqlock);	287	if (req->sv1)
419
420	errno = 0; /* strictly unnecessary */
421
422	type = req->type;
423
424	switch (type)
425	{	288	{
426	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	289	int i;
427	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	290	AV *av = (AV *)req->sv1;
428		291
429	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	292	EXTEND (SP, AvFILL (av) + 1);
430		293	for (i = 0; i <= AvFILL (av); ++i)
431	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	294	PUSHs (*av_fetch (av, i, 0));
432	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	295	}
433	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
434
435	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
436	case REQ_CLOSE: req->result = close (req->fd); break;
437	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
438	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
439	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
440
441	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
442	case REQ_FSYNC: req->result = fsync (req->fd); break;
443
444	case REQ_QUIT:
445	break;	296	break;
446		297
		298	case EIO_NOP:
		299	case EIO_BUSY:
		300	break;
		301
		302	case EIO_READLINK:
		303	if (req->result > 0)
		304	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		305	break;
		306
		307	case EIO_STAT:
		308	case EIO_LSTAT:
		309	case EIO_FSTAT:
		310	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		311	PL_laststatval = req->result;
		312	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		313	PUSHs (sv_2mortal (newSViv (req->result)));
		314	break;
		315
		316	case EIO_READ:
		317	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		318	*SvEND (req->sv2) = 0;
		319	PUSHs (sv_2mortal (newSViv (req->result)));
		320	break;
		321
		322	case EIO_DUP2:
		323	if (req->result > 0)
		324	req->result = 0;
		325	/* FALLTHROUGH */
		326
447	default:	327	default:
448	req->result = ENOSYS;	328	PUSHs (sv_2mortal (newSViv (req->result)));
449	break;	329	break;
450	}	330	}
451		331
452	req->errorno = errno;	332	errno = req->errorno;
453		333
454	pthread_mutex_lock (&reslock);	334	PUTBACK;
		335	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		336	SPAGAIN;
455		337
456	req->next = 0;	338	FREETMPS;
		339	LEAVE;
457		340
458	if (rese)	341	PUTBACK;
459	{
460	rese->next = req;
461	rese = req;
462	}
463	else
464	{
465	rese = ress = req;
466
467	/* write a dummy byte to the pipe so fh becomes ready */
468	write (respipe [1], &respipe, 1);
469	}
470
471	pthread_mutex_unlock (&reslock);
472	}	342	}
473	while (type != REQ_QUIT);
474		343
		344	return !!SvTRUE (ERRSV);
		345	}
		346
		347	static void req_destroy (aio_req req)
		348	{
		349	if (req->self)
		350	{
		351	sv_unmagic (req->self, PERL_MAGIC_ext);
		352	SvREFCNT_dec (req->self);
		353	}
		354
		355	SvREFCNT_dec (req->sv1);
		356	SvREFCNT_dec (req->sv2);
		357	SvREFCNT_dec (req->callback);
		358
		359	Safefree (req);
		360	}
		361
		362	static void req_cancel_subs (aio_req grp)
		363	{
		364	aio_req sub;
		365
		366	if (grp->type != EIO_GROUP)
		367	return;
		368
		369	SvREFCNT_dec (grp->sv2);
		370	grp->sv2 = 0;
		371
		372	eio_grp_cancel (grp);
		373	}
		374
		375	#ifdef USE_SOCKETS_AS_HANDLES
		376	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		377	#else
		378	# define TO_SOCKET(x) (x)
		379	#endif
		380
		381	static void
		382	create_respipe (void)
		383	{
		384	int old_readfd = respipe [0];
		385
		386	if (respipe [1] >= 0)
		387	respipe_close (TO_SOCKET (respipe [1]));
		388
		389	#ifdef _WIN32
		390	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		391	#else
		392	if (pipe (respipe))
		393	#endif
		394	croak ("unable to initialize result pipe");
		395
		396	if (old_readfd >= 0)
		397	{
		398	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		399	croak ("unable to initialize result pipe(2)");
		400
		401	respipe_close (respipe [0]);
		402	respipe [0] = old_readfd;
		403	}
		404
		405	#ifdef _WIN32
		406	int arg = 1;
		407	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		408	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		409	#else
		410	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		411	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		412	#endif
		413	croak ("unable to initialize result pipe(3)");
		414
		415	respipe_osf [0] = TO_SOCKET (respipe [0]);
		416	respipe_osf [1] = TO_SOCKET (respipe [1]);
		417	}
		418
		419	static void poll_wait (void)
		420	{
		421	fd_set rfd;
		422
		423	while (eio_nreqs ())
		424	{
		425	int size;
		426
		427	X_LOCK (reslock);
		428	size = res_queue.size;
		429	X_UNLOCK (reslock);
		430
		431	if (size)
		432	return;
		433
		434	etp_maybe_start_thread ();
		435
		436	FD_ZERO (&rfd);
		437	FD_SET (respipe [0], &rfd);
		438
		439	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		440	}
		441	}
		442
		443	static int poll_cb (void)
		444	{
		445	for (;;)
		446	{
		447	int res = eio_poll ();
		448
		449	if (res > 0)
		450	croak (0);
		451
		452	if (!max_outstanding || max_outstanding > eio_nreqs ())
		453	return res;
		454
		455	poll_wait ();
		456	}
		457	}
		458
		459	static void atfork_child (void)
		460	{
		461	create_respipe ();
		462	}
		463
		464	static SV *
		465	get_cb (SV *cb_sv)
		466	{
		467	HV *st;
		468	GV *gvp;
		469	CV *cv;
		470
		471	if (!SvOK (cb_sv))
475	return 0;	472	return 0;
		473
		474	cv = sv_2cv (cb_sv, &st, &gvp, 0);
		475
		476	if (!cv)
		477	croak ("IO::AIO callback must be undef or a CODE reference");
		478
		479	return (SV *)cv;
476	}	480	}
477		481
478	#define dREQ \	482	#define dREQ \
		483	SV *cb_cv; \
479	aio_req req; \	484	aio_req req; \
		485	int req_pri = next_pri; \
		486	next_pri = EIO_PRI_DEFAULT; \
480	\	487	\
481	if (SvOK (callback) && !SvROK (callback)) \	488	cb_cv = get_cb (callback); \
482	croak ("clalback must be undef or of reference type"); \
483	\	489	\
484	Newz (0, req, 1, aio_cb); \	490	Newz (0, req, 1, eio_req); \
485	if (!req) \	491	if (!req) \
486	croak ("out of memory during aio_req allocation"); \	492	croak ("out of memory during eio_req allocation"); \
487	\	493	\
488	req->callback = SvREFCNT_inc (callback);	494	req->callback = SvREFCNT_inc (cb_cv); \
489		495	req->pri = req_pri
		496
		497	#define REQ_SEND \
		498	PUTBACK; \
		499	req_submit (req); \
		500	SPAGAIN; \
		501	\
		502	if (GIMME_V != G_VOID) \
		503	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		504
		505	static int
		506	extract_fd (SV *fh, int wr)
		507	{
		508	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		509
		510	if (fd < 0)
		511	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		512
		513	return fd;
		514	}
		515
490	MODULE = IO::AIO PACKAGE = IO::AIO	516	MODULE = IO::AIO PACKAGE = IO::AIO
491		517
492	PROTOTYPES: ENABLE	518	PROTOTYPES: ENABLE
493		519
494	BOOT:	520	BOOT:
495	{	521	{
496	if (pipe (respipe))	522	stash = gv_stashpv ("IO::AIO", 1);
497	croak ("unable to initialize result pipe");
498		523
499	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	524	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
500	croak ("cannot set result pipe to nonblocking mode");	525	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		526	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		527	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		528	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		529	#ifndef _WIN32
		530	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		531	#endif
		532	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		533	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		534	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		535	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
501		536
502	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	537	create_respipe ();
503	croak ("cannot set result pipe to nonblocking mode");
504		538
505	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	539	if (eio_init (want_poll, done_poll) < 0)
506	}	540	croak ("IO::AIO: unable to initialise eio library");
507		541
		542	/* atfork child called in fifo order, so before eio's handler */
		543	X_THREAD_ATFORK (0, 0, atfork_child);
		544	}
		545
508	void	546	void
509	min_parallel(nthreads)	547	max_poll_reqs (int nreqs)
510	int nthreads
511	PROTOTYPE: $	548	PROTOTYPE: $
		549	CODE:
		550	eio_set_max_poll_reqs (nreqs);
512		551
513	void	552	void
514	max_parallel(nthreads)	553	max_poll_time (double nseconds)
515	int nthreads
516	PROTOTYPE: $	554	PROTOTYPE: $
517
518	int
519	max_outstanding(nreqs)
520	int nreqs
521	PROTOTYPE: $
522	CODE:	555	CODE:
523	RETVAL = max_outstanding;	556	eio_set_max_poll_time (nseconds);
		557
		558	void
		559	min_parallel (int nthreads)
		560	PROTOTYPE: $
		561	CODE:
		562	eio_set_min_parallel (nthreads);
		563
		564	void
		565	max_parallel (int nthreads)
		566	PROTOTYPE: $
		567	CODE:
		568	eio_set_max_parallel (nthreads);
		569
		570	void
		571	max_idle (int nthreads)
		572	PROTOTYPE: $
		573	CODE:
		574	eio_set_max_idle (nthreads);
		575
		576	void
		577	max_outstanding (int maxreqs)
		578	PROTOTYPE: $
		579	CODE:
524	max_outstanding = nreqs;	580	max_outstanding = maxreqs;
525		581
526	void	582	void
527	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	583	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
528	SV * pathname
529	int flags
530	int mode
531	SV * callback
532	PROTOTYPE: $$$;$	584	PROTOTYPE: $$$;$
533	CODE:	585	PPCODE:
534	{	586	{
535	dREQ;	587	dREQ;
536		588
537	req->type = REQ_OPEN;	589	req->type = EIO_OPEN;
538	req->data = newSVsv (pathname);	590	req->sv1 = newSVsv (pathname);
539	req->dataptr = SvPVbyte_nolen (req->data);	591	req->ptr1 = SvPVbyte_nolen (req->sv1);
540	req->fd = flags;	592	req->int1 = flags;
541	req->mode = mode;	593	req->int2 = mode;
542		594
543	send_req (req);	595	REQ_SEND;
544	}	596	}
545		597
546	void	598	void
547	aio_close(fh,callback=&PL_sv_undef)	599	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
548	SV * fh
549	SV * callback
550	PROTOTYPE: $;$	600	PROTOTYPE: $;$
551	ALIAS:	601	ALIAS:
552	aio_close = REQ_CLOSE
553	aio_fsync = REQ_FSYNC	602	aio_fsync = EIO_FSYNC
554	aio_fdatasync = REQ_FDATASYNC	603	aio_fdatasync = EIO_FDATASYNC
555	CODE:	604	PPCODE:
556	{	605	{
		606	int fd = extract_fd (fh, 0);
557	dREQ;	607	dREQ;
558		608
559	req->type = ix;	609	req->type = ix;
560	req->fh = newSVsv (fh);	610	req->sv1 = newSVsv (fh);
561	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	611	req->int1 = fd;
562		612
563	send_req (req);	613	REQ_SEND (req);
564	}	614	}
565		615
566	void	616	void
		617	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		618	PROTOTYPE: $$$$;$
		619	PPCODE:
		620	{
		621	int fd = extract_fd (fh, 0);
		622	dREQ;
		623
		624	req->type = EIO_SYNC_FILE_RANGE;
		625	req->sv1 = newSVsv (fh);
		626	req->int1 = fd;
		627	req->offs = SvVAL64 (offset);
		628	req->size = SvVAL64 (nbytes);
		629	req->int2 = flags;
		630
		631	REQ_SEND (req);
		632	}
		633
		634	void
		635	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		636	PROTOTYPE: $;$
		637	PPCODE:
		638	{
		639	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		640	int fd = extract_fd (fh, 0);
		641	dREQ;
		642
		643	if (close_pipe < 0)
		644	{
		645	int pipefd [2];
		646
		647	if (pipe (pipefd) < 0
		648	|| close (pipefd [1]) < 0
		649	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		650	abort (); /*D*/
		651
		652	close_pipe = pipefd [0];
		653	}
		654
		655	req->type = EIO_DUP2;
		656	req->int1 = close_pipe;
		657	req->sv2 = newSVsv (fh);
		658	req->int2 = fd;
		659
		660	REQ_SEND (req);
		661	}
		662
		663	void
567	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	664	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
568	SV * fh
569	UV offset
570	IV length
571	SV * data
572	IV dataoffset
573	SV * callback
574	ALIAS:	665	ALIAS:
575	aio_read = REQ_READ	666	aio_read = EIO_READ
576	aio_write = REQ_WRITE	667	aio_write = EIO_WRITE
577	PROTOTYPE: $$$$$;$	668	PROTOTYPE: $$$$$;$
578	CODE:	669	PPCODE:
579	{	670	{
580	aio_req req;
581	STRLEN svlen;	671	STRLEN svlen;
582	char *svptr = SvPVbyte (data, svlen);	672	char *svptr = SvPVbyte (data, svlen);
		673	UV len = SvUV (length);
		674	int fd;
		675
		676	if (SvTYPE (data) > SVt_PVMG)
		677	croak ("illegal data argument '%s', must be plain scalar string", SvPV_nolen (data));
583		678
584	SvUPGRADE (data, SVt_PV);	679	SvUPGRADE (data, SVt_PV);
585	SvPOK_on (data);	680	SvPOK_only (data);
586		681
587	if (dataoffset < 0)	682	if (dataoffset < 0)
588	dataoffset += svlen;	683	dataoffset += svlen;
589		684
590	if (dataoffset < 0 || dataoffset > svlen)	685	if (dataoffset < 0 || dataoffset > svlen)
591	croak ("data offset outside of string");	686	croak ("dataoffset outside of data scalar");
592		687
593	if (ix == REQ_WRITE)	688	if (ix == EIO_WRITE)
594	{	689	{
595	/* write: check length and adjust. */	690	/* write: check length and adjust. */
596	if (length < 0 || length + dataoffset > svlen)	691	if (!SvOK (length) || len + dataoffset > svlen)
597	length = svlen - dataoffset;	692	len = svlen - dataoffset;
598	}	693	}
599	else	694	else
600	{	695	{
601	/* read: grow scalar as necessary */	696	/* read: grow scalar as necessary */
602	svptr = SvGROW (data, length + dataoffset);	697	svptr = SvGROW (data, len + dataoffset + 1);
603	}	698	}
604		699
605	if (length < 0)	700	if (len < 0)
606	croak ("length must not be negative");	701	croak ("length must not be negative");
		702
		703	fd = extract_fd (fh, ix == EIO_WRITE);
607		704
608	{	705	{
609	dREQ;	706	dREQ;
610		707
611	req->type = ix;	708	req->type = ix;
612	req->fh = newSVsv (fh);	709	req->sv1 = newSVsv (fh);
613	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	710	req->int1 = fd;
614	: IoOFP (sv_2io (fh)));	711	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
615	req->offset = offset;	712	req->size = len;
616	req->length = length;
617	req->data = SvREFCNT_inc (data);	713	req->sv2 = SvREFCNT_inc (data);
618	req->dataptr = (char *)svptr + dataoffset;	714	req->ptr2 = (char *)svptr + dataoffset;
619	req->callback = SvREFCNT_inc (callback);	715	req->stroffset = dataoffset;
620		716
621	send_req (req);	717	if (!SvREADONLY (data))
		718	{
		719	SvREADONLY_on (data);
		720	req->flags |= FLAG_SV2_RO_OFF;
		721	}
		722
		723	REQ_SEND;
622	}	724	}
623	}	725	}
624		726
625	void	727	void
		728	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		729	PROTOTYPE: $$;$
		730	PPCODE:
		731	{
		732	SV *data;
		733	dREQ;
		734
		735	req->type = EIO_READLINK;
		736	req->sv1 = newSVsv (path);
		737	req->ptr1 = SvPVbyte_nolen (req->sv1);
		738
		739	REQ_SEND;
		740	}
		741
		742	void
		743	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		744	PROTOTYPE: $$$$;$
		745	PPCODE:
		746	{
		747	int ifd = extract_fd (in_fh , 0);
		748	int ofd = extract_fd (out_fh, 0);
		749	dREQ;
		750
		751	req->type = EIO_SENDFILE;
		752	req->sv1 = newSVsv (out_fh);
		753	req->int1 = ofd;
		754	req->sv2 = newSVsv (in_fh);
		755	req->int2 = ifd;
		756	req->offs = SvVAL64 (in_offset);
		757	req->size = length;
		758
		759	REQ_SEND;
		760	}
		761
		762	void
626	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	763	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
627	SV * fh
628	UV offset
629	IV length
630	SV * callback
631	PROTOTYPE: $$$;$	764	PROTOTYPE: $$$;$
632	CODE:	765	PPCODE:
633	{	766	{
		767	int fd = extract_fd (fh, 0);
634	dREQ;	768	dREQ;
635		769
636	req->type = REQ_READAHEAD;	770	req->type = EIO_READAHEAD;
637	req->fh = newSVsv (fh);	771	req->sv1 = newSVsv (fh);
638	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	772	req->int1 = fd;
639	req->offset = offset;	773	req->offs = SvVAL64 (offset);
640	req->length = length;	774	req->size = length;
641		775
642	send_req (req);	776	REQ_SEND;
643	}	777	}
644		778
645	void	779	void
646	aio_stat(fh_or_path,callback=&PL_sv_undef)	780	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
647	SV * fh_or_path
648	SV * callback
649	ALIAS:	781	ALIAS:
650	aio_stat = REQ_STAT	782	aio_stat = EIO_STAT
651	aio_lstat = REQ_LSTAT	783	aio_lstat = EIO_LSTAT
652	CODE:	784	PPCODE:
653	{	785	{
654	dREQ;	786	dREQ;
655		787
656	New (0, req->statdata, 1, Stat_t);	788	req->sv1 = newSVsv (fh_or_path);
657	if (!req->statdata)
658	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");
659		789
660	if (SvPOK (fh_or_path))	790	if (SvPOK (req->sv1))
661	{	791	{
662	req->type = ix;	792	req->type = ix;
663	req->data = newSVsv (fh_or_path);
664	req->dataptr = SvPVbyte_nolen (req->data);	793	req->ptr1 = SvPVbyte_nolen (req->sv1);
665	}	794	}
666	else	795	else
667	{	796	{
668	req->type = REQ_FSTAT;	797	req->type = EIO_FSTAT;
669	req->fh = newSVsv (fh_or_path);
670	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	798	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		799	}
		800
		801	REQ_SEND;
		802	}
		803
		804	void
		805	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		806	PPCODE:
		807	{
		808	dREQ;
		809
		810	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		811	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		812	req->sv1 = newSVsv (fh_or_path);
		813
		814	if (SvPOK (req->sv1))
671	}	815	{
		816	req->type = EIO_UTIME;
		817	req->ptr1 = SvPVbyte_nolen (req->sv1);
		818	}
		819	else
		820	{
		821	req->type = EIO_FUTIME;
		822	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		823	}
672		824
673	send_req (req);	825	REQ_SEND;
674	}	826	}
675		827
676	void	828	void
		829	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		830	PPCODE:
		831	{
		832	dREQ;
		833
		834	req->sv1 = newSVsv (fh_or_path);
		835	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		836
		837	if (SvPOK (req->sv1))
		838	{
		839	req->type = EIO_TRUNCATE;
		840	req->ptr1 = SvPVbyte_nolen (req->sv1);
		841	}
		842	else
		843	{
		844	req->type = EIO_FTRUNCATE;
		845	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		846	}
		847
		848	REQ_SEND;
		849	}
		850
		851	void
		852	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		853	ALIAS:
		854	aio_chmod = EIO_CHMOD
		855	aio_mkdir = EIO_MKDIR
		856	PPCODE:
		857	{
		858	dREQ;
		859
		860	req->int2 = mode;
		861	req->sv1 = newSVsv (fh_or_path);
		862
		863	if (SvPOK (req->sv1))
		864	{
		865	req->type = ix;
		866	req->ptr1 = SvPVbyte_nolen (req->sv1);
		867	}
		868	else
		869	{
		870	req->type = EIO_FCHMOD;
		871	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		872	}
		873
		874	REQ_SEND;
		875	}
		876
		877	void
		878	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		879	PPCODE:
		880	{
		881	dREQ;
		882
		883	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		884	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		885	req->sv1 = newSVsv (fh_or_path);
		886
		887	if (SvPOK (req->sv1))
		888	{
		889	req->type = EIO_CHOWN;
		890	req->ptr1 = SvPVbyte_nolen (req->sv1);
		891	}
		892	else
		893	{
		894	req->type = EIO_FCHOWN;
		895	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		896	}
		897
		898	REQ_SEND;
		899	}
		900
		901	void
677	aio_unlink(pathname,callback=&PL_sv_undef)	902	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
678	SV * pathname
679	SV * callback
680	ALIAS:	903	ALIAS:
681	aio_unlink = REQ_UNLINK	904	aio_unlink = EIO_UNLINK
682	aio_rmdir = REQ_RMDIR	905	aio_rmdir = EIO_RMDIR
		906	aio_readdir = EIO_READDIR
683	CODE:	907	PPCODE:
684	{	908	{
685	dREQ;	909	dREQ;
686		910
687	req->type = ix;	911	req->type = ix;
688	req->data = newSVsv (pathname);	912	req->sv1 = newSVsv (pathname);
689	req->dataptr = SvPVbyte_nolen (req->data);	913	req->ptr1 = SvPVbyte_nolen (req->sv1);
		914
		915	REQ_SEND;
		916	}
		917
		918	void
		919	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		920	ALIAS:
		921	aio_link = EIO_LINK
		922	aio_symlink = EIO_SYMLINK
		923	aio_rename = EIO_RENAME
		924	PPCODE:
		925	{
		926	dREQ;
690		927
691	send_req (req);	928	req->type = ix;
692	}	929	req->sv1 = newSVsv (oldpath);
693		930	req->ptr1 = SvPVbyte_nolen (req->sv1);
694	void	931	req->sv2 = newSVsv (newpath);
695	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	932	req->ptr2 = SvPVbyte_nolen (req->sv2);
696	SV * oldpath
697	SV * newpath
698	SV * callback
699	CODE:
700	{
701	dREQ;
702		933
703	req->type = REQ_SYMLINK;	934	REQ_SEND;
704	req->fh = newSVsv (oldpath);	935	}
705	req->data2ptr = SvPVbyte_nolen (req->fh);	936
706	req->data = newSVsv (newpath);	937	void
707	req->dataptr = SvPVbyte_nolen (req->data);	938	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		939	PPCODE:
		940	{
		941	dREQ;
708		942
709	send_req (req);	943	req->type = EIO_MKNOD;
		944	req->sv1 = newSVsv (pathname);
		945	req->ptr1 = SvPVbyte_nolen (req->sv1);
		946	req->int2 = (mode_t)mode;
		947	req->offs = dev;
		948
		949	REQ_SEND;
710	}	950	}
711		951
712	void	952	void
		953	aio_busy (double delay, SV *callback=&PL_sv_undef)
		954	PPCODE:
		955	{
		956	dREQ;
		957
		958	req->type = EIO_BUSY;
		959	req->nv1 = delay < 0. ? 0. : delay;
		960
		961	REQ_SEND;
		962	}
		963
		964	void
		965	aio_group (SV *callback=&PL_sv_undef)
		966	PROTOTYPE: ;$
		967	PPCODE:
		968	{
		969	dREQ;
		970
		971	req->type = EIO_GROUP;
		972
		973	req_submit (req);
		974	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		975	}
		976
		977	void
		978	aio_nop (SV *callback=&PL_sv_undef)
		979	ALIAS:
		980	aio_nop = EIO_NOP
		981	aio_sync = EIO_SYNC
		982	PPCODE:
		983	{
		984	dREQ;
		985
		986	req->type = ix;
		987
		988	REQ_SEND;
		989	}
		990
		991	int
		992	aioreq_pri (int pri = 0)
		993	PROTOTYPE: ;$
		994	CODE:
		995	RETVAL = next_pri;
		996	if (items > 0)
		997	{
		998	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		999	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1000	next_pri = pri;
		1001	}
		1002	OUTPUT:
		1003	RETVAL
		1004
		1005	void
		1006	aioreq_nice (int nice = 0)
		1007	CODE:
		1008	nice = next_pri - nice;
		1009	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1010	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1011	next_pri = nice;
		1012
		1013	void
713	flush()	1014	flush ()
714	PROTOTYPE:	1015	PROTOTYPE:
715	CODE:	1016	CODE:
716	while (nreqs)	1017	while (eio_nreqs ())
717	{	1018	{
718	poll_wait ();	1019	poll_wait ();
719	poll_cb ();	1020	poll_cb ();
720	}	1021	}
721		1022
722	void	1023	int
723	poll()	1024	poll()
724	PROTOTYPE:	1025	PROTOTYPE:
725	CODE:	1026	CODE:
726	if (nreqs)
727	{
728	poll_wait ();	1027	poll_wait ();
729	poll_cb ();	1028	RETVAL = poll_cb ();
730	}	1029	OUTPUT:
		1030	RETVAL
731		1031
732	int	1032	int
733	poll_fileno()	1033	poll_fileno()
734	PROTOTYPE:	1034	PROTOTYPE:
735	CODE:	1035	CODE:
…		…
747		1047
748	void	1048	void
749	poll_wait()	1049	poll_wait()
750	PROTOTYPE:	1050	PROTOTYPE:
751	CODE:	1051	CODE:
752	if (nreqs)
753	poll_wait ();	1052	poll_wait ();
754		1053
755	int	1054	int
756	nreqs()	1055	nreqs()
757	PROTOTYPE:	1056	PROTOTYPE:
758	CODE:	1057	CODE:
759	RETVAL = nreqs;	1058	RETVAL = eio_nreqs ();
760	OUTPUT:	1059	OUTPUT:
761	RETVAL	1060	RETVAL
762		1061
		1062	int
		1063	nready()
		1064	PROTOTYPE:
		1065	CODE:
		1066	RETVAL = eio_nready ();
		1067	OUTPUT:
		1068	RETVAL
		1069
		1070	int
		1071	npending()
		1072	PROTOTYPE:
		1073	CODE:
		1074	RETVAL = eio_npending ();
		1075	OUTPUT:
		1076	RETVAL
		1077
		1078	int
		1079	nthreads()
		1080	PROTOTYPE:
		1081	CODE:
		1082	RETVAL = eio_nthreads ();
		1083	OUTPUT:
		1084	RETVAL
		1085
		1086	void _on_next_submit (SV *cb)
		1087	CODE:
		1088	SvREFCNT_dec (on_next_submit);
		1089	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1090
		1091	PROTOTYPES: DISABLE
		1092
		1093	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1094
		1095	void
		1096	cancel (aio_req_ornot req)
		1097	CODE:
		1098	eio_cancel (req);
		1099
		1100	void
		1101	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1102	PPCODE:
		1103	{
		1104	if (GIMME_V != G_VOID)
		1105	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1106
		1107	if (items > 1)
		1108	{
		1109	SV *cb_cv = get_cb (callback);
		1110
		1111	SvREFCNT_dec (req->callback);
		1112	req->callback = SvREFCNT_inc (cb_cv);
		1113	}
		1114	}
		1115
		1116	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1117
		1118	void
		1119	add (aio_req grp, ...)
		1120	PPCODE:
		1121	{
		1122	int i;
		1123
		1124	if (grp->int1 == 2)
		1125	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1126
		1127	for (i = 1; i < items; ++i )
		1128	{
		1129	aio_req req;
		1130
		1131	if (GIMME_V != G_VOID)
		1132	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1133
		1134	req = SvAIO_REQ (ST (i));
		1135
		1136	if (req)
		1137	eio_grp_add (grp, req);
		1138	}
		1139	}
		1140
		1141	void
		1142	cancel_subs (aio_req_ornot req)
		1143	CODE:
		1144	req_cancel_subs (req);
		1145
		1146	void
		1147	result (aio_req grp, ...)
		1148	CODE:
		1149	{
		1150	int i;
		1151	AV *av;
		1152
		1153	grp->errorno = errno;
		1154
		1155	av = newAV ();
		1156
		1157	for (i = 1; i < items; ++i )
		1158	av_push (av, newSVsv (ST (i)));
		1159
		1160	SvREFCNT_dec (grp->sv1);
		1161	grp->sv1 = (SV *)av;
		1162	}
		1163
		1164	void
		1165	errno (aio_req grp, int errorno = errno)
		1166	CODE:
		1167	grp->errorno = errorno;
		1168
		1169	void
		1170	limit (aio_req grp, int limit)
		1171	CODE:
		1172	eio_grp_limit (grp, limit);
		1173
		1174	void
		1175	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1176	CODE:
		1177	{
		1178	SvREFCNT_dec (grp->sv2);
		1179	grp->sv2 = newSVsv (callback);
		1180	grp->feed = aio_grp_feed;
		1181
		1182	if (grp->int2 <= 0)
		1183	grp->int2 = 2;
		1184
		1185	eio_grp_limit (grp, grp->int2);
		1186	}
		1187

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