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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.31 by root, Thu Aug 18 16:34:53 2005 UTC vs.
Revision 1.133 by root, Wed Oct 22 18:15:36 2008 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, wanted;	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 */
71
72	static void free_req (aio_req req)	135	static void req_cancel (aio_req req);
73	{
74	if (req->data)
75	SvREFCNT_dec (req->data);
76		136
		137	static void want_poll (void)
		138	{
		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)
		155	{
		156	req->self = (SV *)newHV ();
		157	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		158	}
		159
		160	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		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)
		211	{
		212	dSP;
		213
		214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
		216
		217	if (!EIO_CANCELLED (req) && req->callback)
		218	{
		219	ENTER;
		220	SAVETMPS;
		221	PUSHMARK (SP);
		222	EXTEND (SP, 1);
		223
		224	switch (req->type)
		225	{
		226	case EIO_READDIR:
		227	{
		228	SV *rv = &PL_sv_undef;
		229
		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);
		250	}
		251	break;
		252
		253	case EIO_OPEN:
		254	{
		255	/* convert fd to fh */
		256	SV *fh = &PL_sv_undef;
		257
		258	if (req->result >= 0)
		259	{
		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);
		267
		268	symlen = snprintf (
		269	sym,
		270	sizeof (sym),
		271	"%s&=%d",
		272	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		273	req->result
		274	);
		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
		280	PUSHs (fh);
		281	}
		282	break;
		283
		284	case EIO_GROUP:
		285	req->int1 = 2; /* mark group as finished */
		286
		287	if (req->sv1)
		288	{
		289	int i;
		290	AV *av = (AV *)req->sv1;
		291
		292	EXTEND (SP, AvFILL (av) + 1);
		293	for (i = 0; i <= AvFILL (av); ++i)
		294	PUSHs (*av_fetch (av, i, 0));
		295	}
		296	break;
		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
		327	default:
		328	PUSHs (sv_2mortal (newSViv (req->result)));
		329	break;
		330	}
		331
		332	errno = req->errorno;
		333
		334	PUTBACK;
		335	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		336	SPAGAIN;
		337
		338	FREETMPS;
		339	LEAVE;
		340
		341	PUTBACK;
		342	}
		343
		344	return !!SvTRUE (ERRSV);
		345	}
		346
		347	static void req_destroy (aio_req req)
		348	{
77	if (req->fh)	349	if (req->self)
		350	{
		351	sv_unmagic (req->self, PERL_MAGIC_ext);
78	SvREFCNT_dec (req->fh);	352	SvREFCNT_dec (req->self);
		353	}
79		354
80	if (req->statdata)	355	SvREFCNT_dec (req->sv1);
81	Safefree (req->statdata);	356	SvREFCNT_dec (req->sv2);
82
83	if (req->callback)
84	SvREFCNT_dec (req->callback);	357	SvREFCNT_dec (req->callback);
85		358
86	Safefree (req);	359	Safefree (req);
87	}	360	}
88		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
89	static void	381	static void
90	poll_wait ()	382	create_respipe (void)
91	{	383	{
92	if (nreqs && !ress)	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)
93	{	397	{
94	fd_set rfd;	398	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
95	FD_ZERO(&rfd);	399	croak ("unable to initialize result pipe(2)");
96	FD_SET(respipe [0], &rfd);
97		400
98	select (respipe [0] + 1, &rfd, 0, 0, 0);	401	respipe_close (respipe [0]);
		402	respipe [0] = old_readfd;
99	}	403	}
100	}
101		404
102	static int	405	#ifdef _WIN32
103	poll_cb ()	406	int arg = 1;
104	{	407	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
105	dSP;	408	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
106	int count = 0;	409	#else
107	int do_croak = 0;	410	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
108	aio_req req;	411	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		412	#endif
		413	croak ("unable to initialize result pipe(3)");
109		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	{
110	for (;;)	445	for (;;)
111	{	446	{
112	pthread_mutex_lock (&reslock);	447	int res = eio_poll ();
113	req = ress;
114		448
115	if (req)	449	if (res > 0)
116	{
117	ress = req->next;
118
119	if (!ress)
120	{
121	/* read any signals sent by the worker threads */
122	char buf [32];
123	while (read (respipe [0], buf, 32) == 32)
124	;
125
126	rese = 0;
127	}
128	}
129
130	pthread_mutex_unlock (&reslock);
131
132	if (!req)
133	break;
134
135	nreqs--;
136
137	if (req->type == REQ_QUIT)
138	started--;
139	else
140	{
141	int errorno = errno;
142	errno = req->errorno;
143
144	if (req->type == REQ_READ)
145	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
146
147	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
148	SvREADONLY_off (req->data);
149
150	if (req->statdata)
151	{
152	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
153	PL_laststatval = req->result;
154	PL_statcache = *(req->statdata);
155	}
156
157	ENTER;
158	PUSHMARK (SP);
159	XPUSHs (sv_2mortal (newSViv (req->result)));
160
161	if (req->type == REQ_OPEN)
162	{
163	/* convert fd to fh */
164	SV *fh;
165
166	PUTBACK;
167	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
168	SPAGAIN;
169
170	fh = SvREFCNT_inc (POPs);
171
172	PUSHMARK (SP);
173	XPUSHs (sv_2mortal (fh));
174	}
175
176	if (SvOK (req->callback))
177	{
178	PUTBACK;
179	call_sv (req->callback, G_VOID | G_EVAL);
180	SPAGAIN;
181
182	if (SvTRUE (ERRSV))
183	{
184	free_req (req);
185	croak (0);	450	croak (0);
186	}
187	}
188		451
189	LEAVE;	452	if (!max_outstanding || max_outstanding > eio_nreqs ())
		453	return res;
190		454
191	errno = errorno;	455	poll_wait ();
192	count++;
193	}
194
195	free_req (req);
196	}	456	}
197
198	return count;
199	}
200
201	static void *aio_proc(void *arg);
202
203	static void
204	start_thread (void)
205	{
206	sigset_t fullsigset, oldsigset;
207	pthread_t tid;
208	pthread_attr_t attr;
209
210	pthread_attr_init (&attr);
211	pthread_attr_setstacksize (&attr, STACKSIZE);
212	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
213
214	sigfillset (&fullsigset);
215	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
216
217	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
218	started++;
219
220	sigprocmask (SIG_SETMASK, &oldsigset, 0);
221	}
222
223	static void
224	send_req (aio_req req)
225	{
226	while (started < wanted && nreqs >= started)
227	start_thread ();
228
229	nreqs++;
230
231	pthread_mutex_lock (&reqlock);
232
233	req->next = 0;
234
235	if (reqe)
236	{
237	reqe->next = req;
238	reqe = req;
239	}
240	else
241	reqe = reqs = req;
242
243	pthread_cond_signal (&reqwait);
244	pthread_mutex_unlock (&reqlock);
245
246	if (nreqs > max_outstanding)
247	for (;;)
248	{
249	poll_cb ();
250
251	if (nreqs <= max_outstanding)
252	break;
253
254	poll_wait ();
255	}
256	}
257
258	static void
259	end_thread (void)
260	{
261	aio_req req;
262	Newz (0, req, 1, aio_cb);
263	req->type = REQ_QUIT;
264
265	send_req (req);
266	}
267
268	static void min_parallel (int nthreads)
269	{
270	if (wanted < nthreads)
271	wanted = nthreads;
272	}
273
274	static void max_parallel (int nthreads)
275	{
276	int cur = started;
277
278	if (wanted > nthreads)
279	wanted = nthreads;
280
281	while (cur > wanted)
282	{
283	end_thread ();
284	cur--;
285	}
286
287	while (started > wanted)
288	{
289	poll_wait ();
290	poll_cb ();
291	}
292	}
293
294	static void create_pipe ()
295	{
296	if (pipe (respipe))
297	croak ("unable to initialize result pipe");
298
299	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
300	croak ("cannot set result pipe to nonblocking mode");
301
302	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
303	croak ("cannot set result pipe to nonblocking mode");
304	}
305
306	static void atfork_prepare (void)
307	{
308	pthread_mutex_lock (&reqlock);
309	pthread_mutex_lock (&reslock);
310	}
311
312	static void atfork_parent (void)
313	{
314	pthread_mutex_unlock (&reslock);
315	pthread_mutex_unlock (&reqlock);
316	}	457	}
317		458
318	static void atfork_child (void)	459	static void atfork_child (void)
319	{	460	{
320	aio_req prv;
321
322	started = 0;
323
324	while (reqs)
325	{
326	prv = reqs;
327	reqs = prv->next;
328	free_req (prv);
329	}
330
331	reqs = reqe = 0;
332
333	while (ress)
334	{
335	prv = ress;
336	ress = prv->next;
337	free_req (prv);
338	}
339
340	ress = rese = 0;
341
342	close (respipe [0]);
343	close (respipe [1]);
344	create_pipe ();	461	create_respipe ();
345
346	atfork_parent ();
347	}	462	}
348		463
349	/*****************************************************************************/
350	/* work around various missing functions */
351
352	#if !HAVE_PREADWRITE
353	# define pread aio_pread
354	# define pwrite aio_pwrite
355
356	/*
357	* make our pread/pwrite safe against themselves, but not against
358	* normal read/write by using a mutex. slows down execution a lot,
359	* but that's your problem, not mine.
360	*/
361	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
362
363	static ssize_t
364	pread (int fd, void *buf, size_t count, off_t offset)
365	{
366	ssize_t res;
367	off_t ooffset;
368
369	pthread_mutex_lock (&iolock);
370	ooffset = lseek (fd, 0, SEEK_CUR);
371	lseek (fd, offset, SEEK_SET);
372	res = read (fd, buf, count);
373	lseek (fd, ooffset, SEEK_SET);
374	pthread_mutex_unlock (&iolock);
375
376	return res;
377	}
378
379	static ssize_t
380	pwrite (int fd, void *buf, size_t count, off_t offset)
381	{
382	ssize_t res;
383	off_t ooffset;
384
385	pthread_mutex_lock (&iolock);
386	ooffset = lseek (fd, 0, SEEK_CUR);
387	lseek (fd, offset, SEEK_SET);
388	res = write (fd, buf, count);
389	lseek (fd, offset, SEEK_SET);
390	pthread_mutex_unlock (&iolock);
391
392	return res;
393	}
394	#endif
395
396	#if !HAVE_FDATASYNC
397	# define fdatasync fsync
398	#endif
399
400	#if !HAVE_READAHEAD
401	# define readahead aio_readahead
402
403	static char readahead_buf[4096];
404
405	static ssize_t
406	readahead (int fd, off_t offset, size_t count)
407	{
408	while (count > 0)
409	{
410	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
411
412	pread (fd, readahead_buf, len, offset);
413	offset += len;
414	count -= len;
415	}
416
417	errno = 0;
418	}
419	#endif
420
421	/*****************************************************************************/
422
423	static void *	464	static SV *
424	aio_proc (void *thr_arg)	465	get_cb (SV *cb_sv)
425	{	466	{
426	aio_req req;	467	HV *st;
427	int type;	468	GV *gvp;
		469	CV *cv;
428		470
429	do	471	if (!SvOK (cb_sv))
430	{
431	pthread_mutex_lock (&reqlock);
432
433	for (;;)
434	{
435	req = reqs;
436
437	if (reqs)
438	{
439	reqs = reqs->next;
440	if (!reqs) reqe = 0;
441	}
442
443	if (req)
444	break;
445
446	pthread_cond_wait (&reqwait, &reqlock);
447	}
448
449	pthread_mutex_unlock (&reqlock);
450
451	errno = 0; /* strictly unnecessary */
452
453	type = req->type;
454
455	switch (type)
456	{
457	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
458	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
459
460	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
461
462	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
463	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
464	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
465
466	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
467	case REQ_CLOSE: req->result = close (req->fd); break;
468	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
469	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
470	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
471
472	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
473	case REQ_FSYNC: req->result = fsync (req->fd); break;
474
475	case REQ_QUIT:
476	break;
477
478	default:
479	req->result = ENOSYS;
480	break;
481	}
482
483	req->errorno = errno;
484
485	pthread_mutex_lock (&reslock);
486
487	req->next = 0;
488
489	if (rese)
490	{
491	rese->next = req;
492	rese = req;
493	}
494	else
495	{
496	rese = ress = req;
497
498	/* write a dummy byte to the pipe so fh becomes ready */
499	write (respipe [1], &respipe, 1);
500	}
501
502	pthread_mutex_unlock (&reslock);
503	}
504	while (type != REQ_QUIT);
505
506	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;
507	}	480	}
508		481
509	#define dREQ \	482	#define dREQ \
		483	SV *cb_cv; \
510	aio_req req; \	484	aio_req req; \
		485	int req_pri = next_pri; \
		486	next_pri = EIO_PRI_DEFAULT; \
511	\	487	\
512	if (SvOK (callback) && !SvROK (callback)) \	488	cb_cv = get_cb (callback); \
513	croak ("clalback must be undef or of reference type"); \
514	\	489	\
515	Newz (0, req, 1, aio_cb); \	490	Newz (0, req, 1, eio_req); \
516	if (!req) \	491	if (!req) \
517	croak ("out of memory during aio_req allocation"); \	492	croak ("out of memory during eio_req allocation"); \
518	\	493	\
519	req->callback = newSVsv (callback);	494	req->callback = SvREFCNT_inc (cb_cv); \
		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));
520		504
521	MODULE = IO::AIO PACKAGE = IO::AIO	505	MODULE = IO::AIO PACKAGE = IO::AIO
522		506
523	PROTOTYPES: ENABLE	507	PROTOTYPES: ENABLE
524		508
525	BOOT:	509	BOOT:
526	{	510	{
527	create_pipe ();	511	stash = gv_stashpv ("IO::AIO", 1);
528	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
529	}
530		512
		513	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		514	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		515	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		516	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		517	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		518	#ifndef _WIN32
		519	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		520	#endif
		521	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		522	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		523	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		524	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
		525
		526	create_respipe ();
		527
		528	if (eio_init (want_poll, done_poll) < 0)
		529	croak ("IO::AIO: unable to initialise eio library");
		530
		531	/* atfork child called in fifo order, so before eio's handler */
		532	X_THREAD_ATFORK (0, 0, atfork_child);
		533	}
		534
531	void	535	void
532	min_parallel(nthreads)	536	max_poll_reqs (int nreqs)
533	int nthreads
534	PROTOTYPE: $	537	PROTOTYPE: $
		538	CODE:
		539	eio_set_max_poll_reqs (nreqs);
535		540
536	void	541	void
537	max_parallel(nthreads)	542	max_poll_time (double nseconds)
538	int nthreads
539	PROTOTYPE: $	543	PROTOTYPE: $
540
541	int
542	max_outstanding(nreqs)
543	int nreqs
544	PROTOTYPE: $
545	CODE:	544	CODE:
546	RETVAL = max_outstanding;	545	eio_set_max_poll_time (nseconds);
		546
		547	void
		548	min_parallel (int nthreads)
		549	PROTOTYPE: $
		550	CODE:
		551	eio_set_min_parallel (nthreads);
		552
		553	void
		554	max_parallel (int nthreads)
		555	PROTOTYPE: $
		556	CODE:
		557	eio_set_max_parallel (nthreads);
		558
		559	void
		560	max_idle (int nthreads)
		561	PROTOTYPE: $
		562	CODE:
		563	eio_set_max_idle (nthreads);
		564
		565	void
		566	max_outstanding (int maxreqs)
		567	PROTOTYPE: $
		568	CODE:
547	max_outstanding = nreqs;	569	max_outstanding = maxreqs;
548		570
549	void	571	void
550	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	572	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
551	SV * pathname
552	int flags
553	int mode
554	SV * callback
555	PROTOTYPE: $$$;$	573	PROTOTYPE: $$$;$
556	CODE:	574	PPCODE:
557	{	575	{
558	dREQ;	576	dREQ;
559		577
560	req->type = REQ_OPEN;	578	req->type = EIO_OPEN;
561	req->data = newSVsv (pathname);	579	req->sv1 = newSVsv (pathname);
562	req->dataptr = SvPVbyte_nolen (req->data);	580	req->ptr1 = SvPVbyte_nolen (req->sv1);
563	req->fd = flags;	581	req->int1 = flags;
564	req->mode = mode;	582	req->int2 = mode;
565		583
566	send_req (req);	584	REQ_SEND;
567	}	585	}
568		586
569	void	587	void
570	aio_close(fh,callback=&PL_sv_undef)	588	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
571	SV * fh
572	SV * callback
573	PROTOTYPE: $;$	589	PROTOTYPE: $;$
574	ALIAS:	590	ALIAS:
575	aio_close = REQ_CLOSE
576	aio_fsync = REQ_FSYNC	591	aio_fsync = EIO_FSYNC
577	aio_fdatasync = REQ_FDATASYNC	592	aio_fdatasync = EIO_FDATASYNC
578	CODE:	593	PPCODE:
579	{	594	{
580	dREQ;	595	dREQ;
581		596
582	req->type = ix;	597	req->type = ix;
583	req->fh = newSVsv (fh);	598	req->sv1 = newSVsv (fh);
584	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	599	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
585		600
586	send_req (req);	601	REQ_SEND (req);
587	}	602	}
588		603
589	void	604	void
		605	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		606	PROTOTYPE: $$$$;$
		607	PPCODE:
		608	{
		609	dREQ;
		610
		611	req->type = EIO_SYNC_FILE_RANGE;
		612	req->sv1 = newSVsv (fh);
		613	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		614	req->offs = SvVAL64 (offset);
		615	req->size = SvVAL64 (nbytes);
		616	req->int2 = flags;
		617
		618	REQ_SEND (req);
		619	}
		620
		621	void
		622	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		623	PROTOTYPE: $;$
		624	PPCODE:
		625	{
		626	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		627	dREQ;
		628
		629	if (close_pipe < 0)
		630	{
		631	int pipefd [2];
		632
		633	if (pipe (pipefd) < 0
		634	|| close (pipefd [1]) < 0
		635	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		636	abort (); /*D*/
		637
		638	close_pipe = pipefd [0];
		639	}
		640
		641	req->type = EIO_DUP2;
		642	req->int1 = close_pipe;
		643	req->sv2 = newSVsv (fh);
		644	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		645
		646	REQ_SEND (req);
		647	}
		648
		649	void
590	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	650	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
591	SV * fh
592	UV offset
593	IV length
594	SV * data
595	IV dataoffset
596	SV * callback
597	ALIAS:	651	ALIAS:
598	aio_read = REQ_READ	652	aio_read = EIO_READ
599	aio_write = REQ_WRITE	653	aio_write = EIO_WRITE
600	PROTOTYPE: $$$$$;$	654	PROTOTYPE: $$$$$;$
601	CODE:	655	PPCODE:
602	{	656	{
603	aio_req req;
604	STRLEN svlen;	657	STRLEN svlen;
605	char *svptr = SvPVbyte (data, svlen);	658	char *svptr = SvPVbyte (data, svlen);
		659	UV len = SvUV (length);
606		660
607	SvUPGRADE (data, SVt_PV);	661	SvUPGRADE (data, SVt_PV);
608	SvPOK_on (data);	662	SvPOK_on (data);
609		663
610	if (dataoffset < 0)	664	if (dataoffset < 0)
611	dataoffset += svlen;	665	dataoffset += svlen;
612		666
613	if (dataoffset < 0 || dataoffset > svlen)	667	if (dataoffset < 0 || dataoffset > svlen)
614	croak ("data offset outside of string");	668	croak ("dataoffset outside of data scalar");
615		669
616	if (ix == REQ_WRITE)	670	if (ix == EIO_WRITE)
617	{	671	{
618	/* write: check length and adjust. */	672	/* write: check length and adjust. */
619	if (length < 0 || length + dataoffset > svlen)	673	if (!SvOK (length) || len + dataoffset > svlen)
620	length = svlen - dataoffset;	674	len = svlen - dataoffset;
621	}	675	}
622	else	676	else
623	{	677	{
624	/* read: grow scalar as necessary */	678	/* read: grow scalar as necessary */
625	svptr = SvGROW (data, length + dataoffset);	679	svptr = SvGROW (data, len + dataoffset + 1);
626	}	680	}
627		681
628	if (length < 0)	682	if (len < 0)
629	croak ("length must not be negative");	683	croak ("length must not be negative");
630		684
631	{	685	{
632	dREQ;	686	dREQ;
633		687
634	req->type = ix;	688	req->type = ix;
635	req->fh = newSVsv (fh);	689	req->sv1 = newSVsv (fh);
636	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	690	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
637	: IoOFP (sv_2io (fh)));	691	: IoOFP (sv_2io (fh)));
		692	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
638	req->offset = offset;	693	req->size = len;
639	req->length = length;
640	req->data = SvREFCNT_inc (data);	694	req->sv2 = SvREFCNT_inc (data);
641	req->dataptr = (char *)svptr + dataoffset;	695	req->ptr2 = (char *)svptr + dataoffset;
		696	req->stroffset = dataoffset;
642		697
643	if (!SvREADONLY (data))	698	if (!SvREADONLY (data))
644	{	699	{
645	SvREADONLY_on (data);	700	SvREADONLY_on (data);
646	req->data2ptr = (void *)data;	701	req->flags |= FLAG_SV2_RO_OFF;
647	}	702	}
648		703
649	send_req (req);	704	REQ_SEND;
650	}	705	}
651	}	706	}
652		707
653	void	708	void
		709	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		710	PROTOTYPE: $$;$
		711	PPCODE:
		712	{
		713	SV *data;
		714	dREQ;
		715
		716	req->type = EIO_READLINK;
		717	req->sv1 = newSVsv (path);
		718	req->ptr1 = SvPVbyte_nolen (req->sv1);
		719
		720	REQ_SEND;
		721	}
		722
		723	void
		724	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		725	PROTOTYPE: $$$$;$
		726	PPCODE:
		727	{
		728	dREQ;
		729
		730	req->type = EIO_SENDFILE;
		731	req->sv1 = newSVsv (out_fh);
		732	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		733	req->sv2 = newSVsv (in_fh);
		734	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		735	req->offs = SvVAL64 (in_offset);
		736	req->size = length;
		737
		738	REQ_SEND;
		739	}
		740
		741	void
654	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	742	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
655	SV * fh
656	UV offset
657	IV length
658	SV * callback
659	PROTOTYPE: $$$;$	743	PROTOTYPE: $$$;$
660	CODE:	744	PPCODE:
661	{	745	{
662	dREQ;	746	dREQ;
663		747
664	req->type = REQ_READAHEAD;	748	req->type = EIO_READAHEAD;
665	req->fh = newSVsv (fh);	749	req->sv1 = newSVsv (fh);
666	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	750	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
667	req->offset = offset;	751	req->offs = SvVAL64 (offset);
668	req->length = length;	752	req->size = length;
669		753
670	send_req (req);	754	REQ_SEND;
671	}	755	}
672		756
673	void	757	void
674	aio_stat(fh_or_path,callback=&PL_sv_undef)	758	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
675	SV * fh_or_path
676	SV * callback
677	ALIAS:	759	ALIAS:
678	aio_stat = REQ_STAT	760	aio_stat = EIO_STAT
679	aio_lstat = REQ_LSTAT	761	aio_lstat = EIO_LSTAT
680	CODE:	762	PPCODE:
681	{	763	{
682	dREQ;	764	dREQ;
683		765
684	New (0, req->statdata, 1, Stat_t);	766	req->sv1 = newSVsv (fh_or_path);
685	if (!req->statdata)
686	{
687	free_req (req);
688	croak ("out of memory during aio_req->statdata allocation");
689	}
690		767
691	if (SvPOK (fh_or_path))	768	if (SvPOK (req->sv1))
692	{	769	{
693	req->type = ix;	770	req->type = ix;
694	req->data = newSVsv (fh_or_path);
695	req->dataptr = SvPVbyte_nolen (req->data);	771	req->ptr1 = SvPVbyte_nolen (req->sv1);
696	}	772	}
697	else	773	else
698	{	774	{
699	req->type = REQ_FSTAT;	775	req->type = EIO_FSTAT;
700	req->fh = newSVsv (fh_or_path);
701	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	776	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		777	}
		778
		779	REQ_SEND;
		780	}
		781
		782	void
		783	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		784	PPCODE:
		785	{
		786	dREQ;
		787
		788	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		789	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		790	req->sv1 = newSVsv (fh_or_path);
		791
		792	if (SvPOK (req->sv1))
702	}	793	{
		794	req->type = EIO_UTIME;
		795	req->ptr1 = SvPVbyte_nolen (req->sv1);
		796	}
		797	else
		798	{
		799	req->type = EIO_FUTIME;
		800	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		801	}
703		802
704	send_req (req);	803	REQ_SEND;
705	}	804	}
706		805
707	void	806	void
		807	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		808	PPCODE:
		809	{
		810	dREQ;
		811
		812	req->sv1 = newSVsv (fh_or_path);
		813	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		814
		815	if (SvPOK (req->sv1))
		816	{
		817	req->type = EIO_TRUNCATE;
		818	req->ptr1 = SvPVbyte_nolen (req->sv1);
		819	}
		820	else
		821	{
		822	req->type = EIO_FTRUNCATE;
		823	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		824	}
		825
		826	REQ_SEND;
		827	}
		828
		829	void
		830	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		831	ALIAS:
		832	aio_chmod = EIO_CHMOD
		833	aio_mkdir = EIO_MKDIR
		834	PPCODE:
		835	{
		836	dREQ;
		837
		838	req->int2 = mode;
		839	req->sv1 = newSVsv (fh_or_path);
		840
		841	if (SvPOK (req->sv1))
		842	{
		843	req->type = ix;
		844	req->ptr1 = SvPVbyte_nolen (req->sv1);
		845	}
		846	else
		847	{
		848	req->type = EIO_FCHMOD;
		849	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		850	}
		851
		852	REQ_SEND;
		853	}
		854
		855	void
		856	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		857	PPCODE:
		858	{
		859	dREQ;
		860
		861	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		862	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		863	req->sv1 = newSVsv (fh_or_path);
		864
		865	if (SvPOK (req->sv1))
		866	{
		867	req->type = EIO_CHOWN;
		868	req->ptr1 = SvPVbyte_nolen (req->sv1);
		869	}
		870	else
		871	{
		872	req->type = EIO_FCHOWN;
		873	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		874	}
		875
		876	REQ_SEND;
		877	}
		878
		879	void
708	aio_unlink(pathname,callback=&PL_sv_undef)	880	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
709	SV * pathname
710	SV * callback
711	ALIAS:	881	ALIAS:
712	aio_unlink = REQ_UNLINK	882	aio_unlink = EIO_UNLINK
713	aio_rmdir = REQ_RMDIR	883	aio_rmdir = EIO_RMDIR
		884	aio_readdir = EIO_READDIR
714	CODE:	885	PPCODE:
715	{	886	{
716	dREQ;	887	dREQ;
717		888
718	req->type = ix;	889	req->type = ix;
719	req->data = newSVsv (pathname);	890	req->sv1 = newSVsv (pathname);
720	req->dataptr = SvPVbyte_nolen (req->data);	891	req->ptr1 = SvPVbyte_nolen (req->sv1);
		892
		893	REQ_SEND;
		894	}
		895
		896	void
		897	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		898	ALIAS:
		899	aio_link = EIO_LINK
		900	aio_symlink = EIO_SYMLINK
		901	aio_rename = EIO_RENAME
		902	PPCODE:
		903	{
		904	dREQ;
721		905
722	send_req (req);	906	req->type = ix;
723	}	907	req->sv1 = newSVsv (oldpath);
724		908	req->ptr1 = SvPVbyte_nolen (req->sv1);
725	void	909	req->sv2 = newSVsv (newpath);
726	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	910	req->ptr2 = SvPVbyte_nolen (req->sv2);
727	SV * oldpath
728	SV * newpath
729	SV * callback
730	CODE:
731	{
732	dREQ;
733		911
734	req->type = REQ_SYMLINK;	912	REQ_SEND;
735	req->fh = newSVsv (oldpath);	913	}
736	req->data2ptr = SvPVbyte_nolen (req->fh);	914
737	req->data = newSVsv (newpath);	915	void
738	req->dataptr = SvPVbyte_nolen (req->data);	916	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		917	PPCODE:
		918	{
		919	dREQ;
739		920
740	send_req (req);	921	req->type = EIO_MKNOD;
		922	req->sv1 = newSVsv (pathname);
		923	req->ptr1 = SvPVbyte_nolen (req->sv1);
		924	req->int2 = (mode_t)mode;
		925	req->offs = dev;
		926
		927	REQ_SEND;
741	}	928	}
742		929
743	void	930	void
		931	aio_busy (double delay, SV *callback=&PL_sv_undef)
		932	PPCODE:
		933	{
		934	dREQ;
		935
		936	req->type = EIO_BUSY;
		937	req->nv1 = delay < 0. ? 0. : delay;
		938
		939	REQ_SEND;
		940	}
		941
		942	void
		943	aio_group (SV *callback=&PL_sv_undef)
		944	PROTOTYPE: ;$
		945	PPCODE:
		946	{
		947	dREQ;
		948
		949	req->type = EIO_GROUP;
		950
		951	req_submit (req);
		952	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		953	}
		954
		955	void
		956	aio_nop (SV *callback=&PL_sv_undef)
		957	ALIAS:
		958	aio_nop = EIO_NOP
		959	aio_sync = EIO_SYNC
		960	PPCODE:
		961	{
		962	dREQ;
		963
		964	req->type = ix;
		965
		966	REQ_SEND;
		967	}
		968
		969	int
		970	aioreq_pri (int pri = 0)
		971	PROTOTYPE: ;$
		972	CODE:
		973	RETVAL = next_pri;
		974	if (items > 0)
		975	{
		976	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		977	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		978	next_pri = pri;
		979	}
		980	OUTPUT:
		981	RETVAL
		982
		983	void
		984	aioreq_nice (int nice = 0)
		985	CODE:
		986	nice = next_pri - nice;
		987	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		988	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		989	next_pri = nice;
		990
		991	void
744	flush()	992	flush ()
745	PROTOTYPE:	993	PROTOTYPE:
746	CODE:	994	CODE:
747	while (nreqs)	995	while (eio_nreqs ())
748	{	996	{
749	poll_wait ();	997	poll_wait ();
750	poll_cb ();	998	poll_cb ();
751	}	999	}
752		1000
753	void	1001	int
754	poll()	1002	poll()
755	PROTOTYPE:	1003	PROTOTYPE:
756	CODE:	1004	CODE:
757	if (nreqs)
758	{
759	poll_wait ();	1005	poll_wait ();
760	poll_cb ();	1006	RETVAL = poll_cb ();
761	}	1007	OUTPUT:
		1008	RETVAL
762		1009
763	int	1010	int
764	poll_fileno()	1011	poll_fileno()
765	PROTOTYPE:	1012	PROTOTYPE:
766	CODE:	1013	CODE:
…		…
778		1025
779	void	1026	void
780	poll_wait()	1027	poll_wait()
781	PROTOTYPE:	1028	PROTOTYPE:
782	CODE:	1029	CODE:
783	if (nreqs)
784	poll_wait ();	1030	poll_wait ();
785		1031
786	int	1032	int
787	nreqs()	1033	nreqs()
788	PROTOTYPE:	1034	PROTOTYPE:
789	CODE:	1035	CODE:
790	RETVAL = nreqs;	1036	RETVAL = eio_nreqs ();
791	OUTPUT:	1037	OUTPUT:
792	RETVAL	1038	RETVAL
793		1039
		1040	int
		1041	nready()
		1042	PROTOTYPE:
		1043	CODE:
		1044	RETVAL = eio_nready ();
		1045	OUTPUT:
		1046	RETVAL
		1047
		1048	int
		1049	npending()
		1050	PROTOTYPE:
		1051	CODE:
		1052	RETVAL = eio_npending ();
		1053	OUTPUT:
		1054	RETVAL
		1055
		1056	int
		1057	nthreads()
		1058	PROTOTYPE:
		1059	CODE:
		1060	RETVAL = eio_nthreads ();
		1061	OUTPUT:
		1062	RETVAL
		1063
		1064	void _on_next_submit (SV *cb)
		1065	CODE:
		1066	SvREFCNT_dec (on_next_submit);
		1067	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1068
		1069	PROTOTYPES: DISABLE
		1070
		1071	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1072
		1073	void
		1074	cancel (aio_req_ornot req)
		1075	CODE:
		1076	eio_cancel (req);
		1077
		1078	void
		1079	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1080	PPCODE:
		1081	{
		1082	if (GIMME_V != G_VOID)
		1083	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1084
		1085	if (items > 1)
		1086	{
		1087	SV *cb_cv = get_cb (callback);
		1088
		1089	SvREFCNT_dec (req->callback);
		1090	req->callback = SvREFCNT_inc (cb_cv);
		1091	}
		1092	}
		1093
		1094	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1095
		1096	void
		1097	add (aio_req grp, ...)
		1098	PPCODE:
		1099	{
		1100	int i;
		1101
		1102	if (grp->int1 == 2)
		1103	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1104
		1105	for (i = 1; i < items; ++i )
		1106	{
		1107	aio_req req;
		1108
		1109	if (GIMME_V != G_VOID)
		1110	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1111
		1112	req = SvAIO_REQ (ST (i));
		1113
		1114	if (req)
		1115	eio_grp_add (grp, req);
		1116	}
		1117	}
		1118
		1119	void
		1120	cancel_subs (aio_req_ornot req)
		1121	CODE:
		1122	req_cancel_subs (req);
		1123
		1124	void
		1125	result (aio_req grp, ...)
		1126	CODE:
		1127	{
		1128	int i;
		1129	AV *av;
		1130
		1131	grp->errorno = errno;
		1132
		1133	av = newAV ();
		1134
		1135	for (i = 1; i < items; ++i )
		1136	av_push (av, newSVsv (ST (i)));
		1137
		1138	SvREFCNT_dec (grp->sv1);
		1139	grp->sv1 = (SV *)av;
		1140	}
		1141
		1142	void
		1143	errno (aio_req grp, int errorno = errno)
		1144	CODE:
		1145	grp->errorno = errorno;
		1146
		1147	void
		1148	limit (aio_req grp, int limit)
		1149	CODE:
		1150	eio_grp_limit (grp, limit);
		1151
		1152	void
		1153	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1154	CODE:
		1155	{
		1156	SvREFCNT_dec (grp->sv2);
		1157	grp->sv2 = newSVsv (callback);
		1158	grp->feed = aio_grp_feed;
		1159
		1160	if (grp->int2 <= 0)
		1161	grp->int2 = 2;
		1162
		1163	eio_grp_limit (grp, grp->int2);
		1164	}
		1165

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