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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.28 by root, Wed Aug 17 05:06:59 2005 UTC vs.
Revision 1.139 by root, Tue Apr 21 20:12:56 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_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	{
		318	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		319	*SvEND (req->sv2) = 0;
		320	SvPOK_only (req->sv2);
		321	SvSETMAGIC (req->sv2);
		322	PUSHs (sv_2mortal (newSViv (req->result)));
		323	}
		324	break;
		325
		326	case EIO_DUP2:
		327	if (req->result > 0)
		328	req->result = 0;
		329	/* FALLTHROUGH */
		330
		331	default:
		332	PUSHs (sv_2mortal (newSViv (req->result)));
		333	break;
		334	}
		335
		336	errno = req->errorno;
		337
		338	PUTBACK;
		339	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		340	SPAGAIN;
		341
		342	FREETMPS;
		343	LEAVE;
		344
		345	PUTBACK;
		346	}
		347
		348	return !!SvTRUE (ERRSV);
		349	}
		350
		351	static void req_destroy (aio_req req)
		352	{
77	if (req->fh)	353	if (req->self)
		354	{
		355	sv_unmagic (req->self, PERL_MAGIC_ext);
78	SvREFCNT_dec (req->fh);	356	SvREFCNT_dec (req->self);
		357	}
79		358
80	if (req->statdata)	359	SvREFCNT_dec (req->sv1);
81	Safefree (req->statdata);	360	SvREFCNT_dec (req->sv2);
82
83	if (req->callback)
84	SvREFCNT_dec (req->callback);	361	SvREFCNT_dec (req->callback);
85		362
86	Safefree (req);	363	Safefree (req);
87	}	364	}
88		365
		366	static void req_cancel_subs (aio_req grp)
		367	{
		368	aio_req sub;
		369
		370	if (grp->type != EIO_GROUP)
		371	return;
		372
		373	SvREFCNT_dec (grp->sv2);
		374	grp->sv2 = 0;
		375
		376	eio_grp_cancel (grp);
		377	}
		378
		379	#ifdef USE_SOCKETS_AS_HANDLES
		380	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		381	#else
		382	# define TO_SOCKET(x) (x)
		383	#endif
		384
89	static void	385	static void
90	poll_wait ()	386	create_respipe (void)
91	{	387	{
92	if (nreqs && !ress)	388	int old_readfd = respipe [0];
		389
		390	if (respipe [1] >= 0)
		391	respipe_close (TO_SOCKET (respipe [1]));
		392
		393	#ifdef _WIN32
		394	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		395	#else
		396	if (pipe (respipe))
		397	#endif
		398	croak ("unable to initialize result pipe");
		399
		400	if (old_readfd >= 0)
93	{	401	{
94	fd_set rfd;	402	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
95	FD_ZERO(&rfd);	403	croak ("unable to initialize result pipe(2)");
96	FD_SET(respipe [0], &rfd);
97		404
98	select (respipe [0] + 1, &rfd, 0, 0, 0);	405	respipe_close (respipe [0]);
		406	respipe [0] = old_readfd;
99	}	407	}
100	}
101		408
102	static int	409	#ifdef _WIN32
103	poll_cb ()	410	int arg = 1;
104	{	411	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
105	dSP;	412	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
106	int count = 0;	413	#else
107	int do_croak = 0;	414	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
108	aio_req req;	415	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		416	#endif
		417	croak ("unable to initialize result pipe(3)");
109		418
		419	respipe_osf [0] = TO_SOCKET (respipe [0]);
		420	respipe_osf [1] = TO_SOCKET (respipe [1]);
		421	}
		422
		423	static void poll_wait (void)
		424	{
		425	fd_set rfd;
		426
		427	while (eio_nreqs ())
		428	{
		429	int size;
		430
		431	X_LOCK (reslock);
		432	size = res_queue.size;
		433	X_UNLOCK (reslock);
		434
		435	if (size)
		436	return;
		437
		438	etp_maybe_start_thread ();
		439
		440	FD_ZERO (&rfd);
		441	FD_SET (respipe [0], &rfd);
		442
		443	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		444	}
		445	}
		446
		447	static int poll_cb (void)
		448	{
110	for (;;)	449	for (;;)
111	{	450	{
112	pthread_mutex_lock (&reslock);	451	int res = eio_poll ();
113	req = ress;
114		452
115	if (req)	453	if (res > 0)
116	{
117	ress = req->next;
118
119	if (!ress)
120	{
121	rese = 0;
122
123	/* read any signals sent by the worker threads */
124	char buf [32];
125	while (read (respipe [0], buf, 32) == 32)
126	;
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);	454	croak (0);
186	}
187	}
188		455
189	LEAVE;	456	if (!max_outstanding || max_outstanding > eio_nreqs ())
		457	return res;
190		458
191	errno = errorno;	459	poll_wait ();
192	count++;
193	}
194
195	free_req (req);
196	}	460	}
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	nreqs++;
227
228	pthread_mutex_lock (&reqlock);
229
230	req->next = 0;
231
232	if (reqe)
233	{
234	reqe->next = req;
235	reqe = req;
236	}
237	else
238	reqe = reqs = req;
239
240	pthread_cond_signal (&reqwait);
241	pthread_mutex_unlock (&reqlock);
242
243	if (nreqs > max_outstanding)
244	for (;;)
245	{
246	poll_cb ();
247
248	if (nreqs <= max_outstanding)
249	break;
250
251	poll_wait ();
252	}
253	}
254
255	static void
256	end_thread (void)
257	{
258	aio_req req;
259	Newz (0, req, 1, aio_cb);
260	req->type = REQ_QUIT;
261
262	send_req (req);
263	}
264
265	static void min_parallel (int nthreads)
266	{
267	while (nthreads > started)
268	start_thread ();
269	}
270
271	static void max_parallel (int nthreads)
272	{
273	int cur = started;
274
275	while (cur > nthreads)
276	{
277	end_thread ();
278	cur--;
279	}
280
281	while (started > nthreads)
282	{
283	poll_wait ();
284	poll_cb ();
285	}
286	}
287
288	static void create_pipe ()
289	{
290	if (pipe (respipe))
291	croak ("unable to initialize result pipe");
292
293	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
294	croak ("cannot set result pipe to nonblocking mode");
295
296	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
297	croak ("cannot set result pipe to nonblocking mode");
298	}
299
300	static void atfork_prepare (void)
301	{
302	pthread_mutex_lock (&reqlock);
303	pthread_mutex_lock (&reslock);
304	}
305
306	static void atfork_parent (void)
307	{
308	pthread_mutex_unlock (&reslock);
309	pthread_mutex_unlock (&reqlock);
310	}	461	}
311		462
312	static void atfork_child (void)	463	static void atfork_child (void)
313	{	464	{
314	aio_req prv;	465	create_respipe ();
315
316	int restart = started;
317	started = 0;
318
319	while (reqs)
320	{
321	prv = reqs;
322	reqs = prv->next;
323	free_req (prv);
324	}
325
326	reqs = reqe = 0;
327
328	while (ress)
329	{
330	prv = ress;
331	ress = prv->next;
332	free_req (prv);
333	}
334
335	ress = rese = 0;
336
337	atfork_parent ();
338
339	min_parallel (restart);
340	}	466	}
341		467
342	/*****************************************************************************/	468	static SV *
343	/* work around various missing functions */	469	get_cb (SV *cb_sv)
		470	{
		471	HV *st;
		472	GV *gvp;
		473	CV *cv;
344		474
345	#if !HAVE_PREADWRITE	475	if (!SvOK (cb_sv))
346	# define pread aio_pread	476	return 0;
347	# define pwrite aio_pwrite
348		477
349	/*	478	cv = sv_2cv (cb_sv, &st, &gvp, 0);
350	* make our pread/pwrite safe against themselves, but not against
351	* normal read/write by using a mutex. slows down execution a lot,
352	* but that's your problem, not mine.
353	*/
354	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
355		479
		480	if (!cv)
		481	croak ("IO::AIO callback must be undef or a CODE reference");
		482
		483	return (SV *)cv;
		484	}
		485
		486	#define dREQ \
		487	SV *cb_cv; \
		488	aio_req req; \
		489	int req_pri = next_pri; \
		490	next_pri = EIO_PRI_DEFAULT; \
		491	\
		492	cb_cv = get_cb (callback); \
		493	\
		494	Newz (0, req, 1, eio_req); \
		495	if (!req) \
		496	croak ("out of memory during eio_req allocation"); \
		497	\
		498	req->callback = SvREFCNT_inc (cb_cv); \
		499	req->pri = req_pri
		500
		501	#define REQ_SEND \
		502	PUTBACK; \
		503	req_submit (req); \
		504	SPAGAIN; \
		505	\
		506	if (GIMME_V != G_VOID) \
		507	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		508
356	static ssize_t	509	static int
357	pread (int fd, void *buf, size_t count, off_t offset)	510	extract_fd (SV *fh, int wr)
358	{	511	{
359	ssize_t res;	512	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
360	off_t ooffset;
361		513
362	pthread_mutex_lock (&iolock);	514	if (fd < 0)
363	ooffset = lseek (fd, 0, SEEK_CUR);	515	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
364	lseek (fd, offset, SEEK_SET);
365	res = read (fd, buf, count);
366	lseek (fd, ooffset, SEEK_SET);
367	pthread_mutex_unlock (&iolock);
368		516
369	return res;	517	return fd;
370	}	518	}
371		519
372	static ssize_t	520	MODULE = IO::AIO PACKAGE = IO::AIO
373	pwrite (int fd, void *buf, size_t count, off_t offset)
374	{
375	ssize_t res;
376	off_t ooffset;
377		521
378	pthread_mutex_lock (&iolock);	522	PROTOTYPES: ENABLE
379	ooffset = lseek (fd, 0, SEEK_CUR);
380	lseek (fd, offset, SEEK_SET);
381	res = write (fd, buf, count);
382	lseek (fd, offset, SEEK_SET);
383	pthread_mutex_unlock (&iolock);
384		523
385	return res;	524	BOOT:
386	}	525	{
		526	stash = gv_stashpv ("IO::AIO", 1);
		527
		528	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		529	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		530	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		531	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		532	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		533	#ifndef _WIN32
		534	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
387	#endif	535	#endif
		536	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		537	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		538	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		539	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
388		540
389	#if !HAVE_FDATASYNC	541	create_respipe ();
390	# define fdatasync fsync
391	#endif
392		542
393	#if !HAVE_READAHEAD	543	if (eio_init (want_poll, done_poll) < 0)
394	# define readahead aio_readahead	544	croak ("IO::AIO: unable to initialise eio library");
395		545
396	static char readahead_buf[4096];	546	/* atfork child called in fifo order, so before eio's handler */
397		547	X_THREAD_ATFORK (0, 0, atfork_child);
398	static ssize_t
399	readahead (int fd, off_t offset, size_t count)
400	{
401	while (count > 0)
402	{
403	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
404
405	pread (fd, readahead_buf, len, offset);
406	offset += len;
407	count -= len;
408	}
409
410	errno = 0;
411	}	548	}
412	#endif
413		549
414	/*****************************************************************************/
415
416	static void *
417	aio_proc (void *thr_arg)
418	{
419	aio_req req;
420	int type;
421
422	do
423	{
424	pthread_mutex_lock (&reqlock);
425
426	for (;;)
427	{
428	req = reqs;
429
430	if (reqs)
431	{
432	reqs = reqs->next;
433	if (!reqs) reqe = 0;
434	}
435
436	if (req)
437	break;
438
439	pthread_cond_wait (&reqwait, &reqlock);
440	}
441
442	pthread_mutex_unlock (&reqlock);
443
444	errno = 0; /* strictly unnecessary */
445
446	type = req->type;
447
448	switch (type)
449	{
450	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
451	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
452
453	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
454
455	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
456	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
457	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
458
459	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
460	case REQ_CLOSE: req->result = close (req->fd); break;
461	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
462	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
463	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
464
465	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
466	case REQ_FSYNC: req->result = fsync (req->fd); break;
467
468	case REQ_QUIT:
469	break;
470
471	default:
472	req->result = ENOSYS;
473	break;
474	}
475
476	req->errorno = errno;
477
478	pthread_mutex_lock (&reslock);
479
480	req->next = 0;
481
482	if (rese)
483	{
484	rese->next = req;
485	rese = req;
486	}
487	else
488	{
489	rese = ress = req;
490
491	/* write a dummy byte to the pipe so fh becomes ready */
492	write (respipe [1], &respipe, 1);
493	}
494
495	pthread_mutex_unlock (&reslock);
496	}
497	while (type != REQ_QUIT);
498
499	return 0;
500	}
501
502	#define dREQ \
503	aio_req req; \
504	\
505	if (SvOK (callback) && !SvROK (callback)) \
506	croak ("clalback must be undef or of reference type"); \
507	\
508	Newz (0, req, 1, aio_cb); \
509	if (!req) \
510	croak ("out of memory during aio_req allocation"); \
511	\
512	req->callback = newSVsv (callback);
513
514	MODULE = IO::AIO PACKAGE = IO::AIO
515
516	PROTOTYPES: ENABLE
517
518	BOOT:
519	{
520	create_pipe ();
521	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
522	}
523
524	void	550	void
525	min_parallel(nthreads)	551	max_poll_reqs (int nreqs)
526	int nthreads
527	PROTOTYPE: $	552	PROTOTYPE: $
		553	CODE:
		554	eio_set_max_poll_reqs (nreqs);
528		555
529	void	556	void
530	max_parallel(nthreads)	557	max_poll_time (double nseconds)
531	int nthreads
532	PROTOTYPE: $	558	PROTOTYPE: $
533
534	int
535	max_outstanding(nreqs)
536	int nreqs
537	PROTOTYPE: $
538	CODE:	559	CODE:
539	RETVAL = max_outstanding;	560	eio_set_max_poll_time (nseconds);
		561
		562	void
		563	min_parallel (int nthreads)
		564	PROTOTYPE: $
		565	CODE:
		566	eio_set_min_parallel (nthreads);
		567
		568	void
		569	max_parallel (int nthreads)
		570	PROTOTYPE: $
		571	CODE:
		572	eio_set_max_parallel (nthreads);
		573
		574	void
		575	max_idle (int nthreads)
		576	PROTOTYPE: $
		577	CODE:
		578	eio_set_max_idle (nthreads);
		579
		580	void
		581	max_outstanding (int maxreqs)
		582	PROTOTYPE: $
		583	CODE:
540	max_outstanding = nreqs;	584	max_outstanding = maxreqs;
541		585
542	void	586	void
543	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	587	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
544	SV * pathname
545	int flags
546	int mode
547	SV * callback
548	PROTOTYPE: $$$;$	588	PROTOTYPE: $$$;$
549	CODE:	589	PPCODE:
550	{	590	{
551	dREQ;	591	dREQ;
552		592
553	req->type = REQ_OPEN;	593	req->type = EIO_OPEN;
554	req->data = newSVsv (pathname);	594	req->sv1 = newSVsv (pathname);
555	req->dataptr = SvPVbyte_nolen (req->data);	595	req->ptr1 = SvPVbyte_nolen (req->sv1);
556	req->fd = flags;	596	req->int1 = flags;
557	req->mode = mode;	597	req->int2 = mode;
558		598
559	send_req (req);	599	REQ_SEND;
560	}	600	}
561		601
562	void	602	void
563	aio_close(fh,callback=&PL_sv_undef)	603	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
564	SV * fh
565	SV * callback
566	PROTOTYPE: $;$	604	PROTOTYPE: $;$
567	ALIAS:	605	ALIAS:
568	aio_close = REQ_CLOSE
569	aio_fsync = REQ_FSYNC	606	aio_fsync = EIO_FSYNC
570	aio_fdatasync = REQ_FDATASYNC	607	aio_fdatasync = EIO_FDATASYNC
571	CODE:	608	PPCODE:
572	{	609	{
		610	int fd = extract_fd (fh, 0);
573	dREQ;	611	dREQ;
574		612
575	req->type = ix;	613	req->type = ix;
576	req->fh = newSVsv (fh);	614	req->sv1 = newSVsv (fh);
577	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	615	req->int1 = fd;
578		616
579	send_req (req);	617	REQ_SEND (req);
580	}	618	}
581		619
582	void	620	void
		621	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		622	PROTOTYPE: $$$$;$
		623	PPCODE:
		624	{
		625	int fd = extract_fd (fh, 0);
		626	dREQ;
		627
		628	req->type = EIO_SYNC_FILE_RANGE;
		629	req->sv1 = newSVsv (fh);
		630	req->int1 = fd;
		631	req->offs = SvVAL64 (offset);
		632	req->size = SvVAL64 (nbytes);
		633	req->int2 = flags;
		634
		635	REQ_SEND (req);
		636	}
		637
		638	void
		639	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		640	PROTOTYPE: $;$
		641	PPCODE:
		642	{
		643	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		644	int fd = extract_fd (fh, 0);
		645	dREQ;
		646
		647	if (close_pipe < 0)
		648	{
		649	int pipefd [2];
		650
		651	if (pipe (pipefd) < 0
		652	|| close (pipefd [1]) < 0
		653	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		654	abort (); /*D*/
		655
		656	close_pipe = pipefd [0];
		657	}
		658
		659	req->type = EIO_DUP2;
		660	req->int1 = close_pipe;
		661	req->sv2 = newSVsv (fh);
		662	req->int2 = fd;
		663
		664	REQ_SEND (req);
		665	}
		666
		667	void
583	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	668	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
584	SV * fh
585	UV offset
586	IV length
587	SV * data
588	IV dataoffset
589	SV * callback
590	ALIAS:	669	ALIAS:
591	aio_read = REQ_READ	670	aio_read = EIO_READ
592	aio_write = REQ_WRITE	671	aio_write = EIO_WRITE
593	PROTOTYPE: $$$$$;$	672	PROTOTYPE: $$$$$;$
594	CODE:	673	PPCODE:
595	{	674	{
596	aio_req req;
597	STRLEN svlen;	675	STRLEN svlen;
		676	int fd = extract_fd (fh, ix == EIO_WRITE);
598	char *svptr = SvPVbyte (data, svlen);	677	char *svptr = SvPVbyte (data, svlen);
599		678	UV len = SvUV (length);
600	SvUPGRADE (data, SVt_PV);
601	SvPOK_on (data);
602		679
603	if (dataoffset < 0)	680	if (dataoffset < 0)
604	dataoffset += svlen;	681	dataoffset += svlen;
605		682
606	if (dataoffset < 0 || dataoffset > svlen)	683	if (dataoffset < 0 || dataoffset > svlen)
607	croak ("data offset outside of string");	684	croak ("dataoffset outside of data scalar");
608		685
609	if (ix == REQ_WRITE)	686	if (ix == EIO_WRITE)
610	{	687	{
611	/* write: check length and adjust. */	688	/* write: check length and adjust. */
612	if (length < 0 || length + dataoffset > svlen)	689	if (!SvOK (length) || len + dataoffset > svlen)
613	length = svlen - dataoffset;	690	len = svlen - dataoffset;
614	}	691	}
615	else	692	else
616	{	693	{
617	/* read: grow scalar as necessary */	694	/* read: check type and grow scalar as necessary */
		695	SvUPGRADE (data, SVt_PV);
618	svptr = SvGROW (data, length + dataoffset);	696	svptr = SvGROW (data, len + dataoffset + 1);
619	}	697	}
620
621	if (length < 0)
622	croak ("length must not be negative");
623		698
624	{	699	{
625	dREQ;	700	dREQ;
626		701
627	req->type = ix;	702	req->type = ix;
628	req->fh = newSVsv (fh);	703	req->sv1 = newSVsv (fh);
629	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	704	req->int1 = fd;
630	: IoOFP (sv_2io (fh)));	705	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
631	req->offset = offset;	706	req->size = len;
632	req->length = length;
633	req->data = SvREFCNT_inc (data);	707	req->sv2 = SvREFCNT_inc (data);
634	req->dataptr = (char *)svptr + dataoffset;	708	req->ptr2 = (char *)svptr + dataoffset;
		709	req->stroffset = dataoffset;
635		710
636	if (!SvREADONLY (data))	711	if (!SvREADONLY (data))
637	{	712	{
638	SvREADONLY_on (data);	713	SvREADONLY_on (data);
639	req->data2ptr = (void *)data;	714	req->flags |= FLAG_SV2_RO_OFF;
640	}	715	}
641		716
642	send_req (req);	717	REQ_SEND;
643	}	718	}
644	}	719	}
645		720
646	void	721	void
		722	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		723	PROTOTYPE: $$;$
		724	PPCODE:
		725	{
		726	SV *data;
		727	dREQ;
		728
		729	req->type = EIO_READLINK;
		730	req->sv1 = newSVsv (path);
		731	req->ptr1 = SvPVbyte_nolen (req->sv1);
		732
		733	REQ_SEND;
		734	}
		735
		736	void
		737	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		738	PROTOTYPE: $$$$;$
		739	PPCODE:
		740	{
		741	int ifd = extract_fd (in_fh , 0);
		742	int ofd = extract_fd (out_fh, 0);
		743	dREQ;
		744
		745	req->type = EIO_SENDFILE;
		746	req->sv1 = newSVsv (out_fh);
		747	req->int1 = ofd;
		748	req->sv2 = newSVsv (in_fh);
		749	req->int2 = ifd;
		750	req->offs = SvVAL64 (in_offset);
		751	req->size = length;
		752
		753	REQ_SEND;
		754	}
		755
		756	void
647	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	757	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
648	SV * fh
649	UV offset
650	IV length
651	SV * callback
652	PROTOTYPE: $$$;$	758	PROTOTYPE: $$$;$
653	CODE:	759	PPCODE:
654	{	760	{
		761	int fd = extract_fd (fh, 0);
655	dREQ;	762	dREQ;
656		763
657	req->type = REQ_READAHEAD;	764	req->type = EIO_READAHEAD;
658	req->fh = newSVsv (fh);	765	req->sv1 = newSVsv (fh);
659	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	766	req->int1 = fd;
660	req->offset = offset;	767	req->offs = SvVAL64 (offset);
661	req->length = length;	768	req->size = length;
662		769
663	send_req (req);	770	REQ_SEND;
664	}	771	}
665		772
666	void	773	void
667	aio_stat(fh_or_path,callback=&PL_sv_undef)	774	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
668	SV * fh_or_path
669	SV * callback
670	ALIAS:	775	ALIAS:
671	aio_stat = REQ_STAT	776	aio_stat = EIO_STAT
672	aio_lstat = REQ_LSTAT	777	aio_lstat = EIO_LSTAT
673	CODE:	778	PPCODE:
674	{	779	{
675	dREQ;	780	dREQ;
676		781
677	New (0, req->statdata, 1, Stat_t);	782	req->sv1 = newSVsv (fh_or_path);
678	if (!req->statdata)
679	{
680	free_req (req);
681	croak ("out of memory during aio_req->statdata allocation");
682	}
683		783
684	if (SvPOK (fh_or_path))	784	if (SvPOK (req->sv1))
685	{	785	{
686	req->type = ix;	786	req->type = ix;
687	req->data = newSVsv (fh_or_path);
688	req->dataptr = SvPVbyte_nolen (req->data);	787	req->ptr1 = SvPVbyte_nolen (req->sv1);
689	}	788	}
690	else	789	else
691	{	790	{
692	req->type = REQ_FSTAT;	791	req->type = EIO_FSTAT;
693	req->fh = newSVsv (fh_or_path);
694	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	792	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		793	}
		794
		795	REQ_SEND;
		796	}
		797
		798	void
		799	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		800	PPCODE:
		801	{
		802	dREQ;
		803
		804	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		805	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		806	req->sv1 = newSVsv (fh_or_path);
		807
		808	if (SvPOK (req->sv1))
695	}	809	{
		810	req->type = EIO_UTIME;
		811	req->ptr1 = SvPVbyte_nolen (req->sv1);
		812	}
		813	else
		814	{
		815	req->type = EIO_FUTIME;
		816	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		817	}
696		818
697	send_req (req);	819	REQ_SEND;
698	}	820	}
699		821
700	void	822	void
		823	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		824	PPCODE:
		825	{
		826	dREQ;
		827
		828	req->sv1 = newSVsv (fh_or_path);
		829	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		830
		831	if (SvPOK (req->sv1))
		832	{
		833	req->type = EIO_TRUNCATE;
		834	req->ptr1 = SvPVbyte_nolen (req->sv1);
		835	}
		836	else
		837	{
		838	req->type = EIO_FTRUNCATE;
		839	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		840	}
		841
		842	REQ_SEND;
		843	}
		844
		845	void
		846	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		847	ALIAS:
		848	aio_chmod = EIO_CHMOD
		849	aio_mkdir = EIO_MKDIR
		850	PPCODE:
		851	{
		852	dREQ;
		853
		854	req->int2 = mode;
		855	req->sv1 = newSVsv (fh_or_path);
		856
		857	if (SvPOK (req->sv1))
		858	{
		859	req->type = ix;
		860	req->ptr1 = SvPVbyte_nolen (req->sv1);
		861	}
		862	else
		863	{
		864	req->type = EIO_FCHMOD;
		865	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		866	}
		867
		868	REQ_SEND;
		869	}
		870
		871	void
		872	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		873	PPCODE:
		874	{
		875	dREQ;
		876
		877	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		878	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		879	req->sv1 = newSVsv (fh_or_path);
		880
		881	if (SvPOK (req->sv1))
		882	{
		883	req->type = EIO_CHOWN;
		884	req->ptr1 = SvPVbyte_nolen (req->sv1);
		885	}
		886	else
		887	{
		888	req->type = EIO_FCHOWN;
		889	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		890	}
		891
		892	REQ_SEND;
		893	}
		894
		895	void
701	aio_unlink(pathname,callback=&PL_sv_undef)	896	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
702	SV * pathname
703	SV * callback
704	ALIAS:	897	ALIAS:
705	aio_unlink = REQ_UNLINK	898	aio_unlink = EIO_UNLINK
706	aio_rmdir = REQ_RMDIR	899	aio_rmdir = EIO_RMDIR
		900	aio_readdir = EIO_READDIR
707	CODE:	901	PPCODE:
708	{	902	{
709	dREQ;	903	dREQ;
710		904
711	req->type = ix;	905	req->type = ix;
712	req->data = newSVsv (pathname);	906	req->sv1 = newSVsv (pathname);
713	req->dataptr = SvPVbyte_nolen (req->data);	907	req->ptr1 = SvPVbyte_nolen (req->sv1);
		908
		909	REQ_SEND;
		910	}
		911
		912	void
		913	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		914	ALIAS:
		915	aio_link = EIO_LINK
		916	aio_symlink = EIO_SYMLINK
		917	aio_rename = EIO_RENAME
		918	PPCODE:
		919	{
		920	dREQ;
714		921
715	send_req (req);	922	req->type = ix;
716	}	923	req->sv1 = newSVsv (oldpath);
717		924	req->ptr1 = SvPVbyte_nolen (req->sv1);
718	void	925	req->sv2 = newSVsv (newpath);
719	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	926	req->ptr2 = SvPVbyte_nolen (req->sv2);
720	SV * oldpath
721	SV * newpath
722	SV * callback
723	CODE:
724	{
725	dREQ;
726		927
727	req->type = REQ_SYMLINK;	928	REQ_SEND;
728	req->fh = newSVsv (oldpath);	929	}
729	req->data2ptr = SvPVbyte_nolen (req->fh);	930
730	req->data = newSVsv (newpath);	931	void
731	req->dataptr = SvPVbyte_nolen (req->data);	932	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		933	PPCODE:
		934	{
		935	dREQ;
732		936
733	send_req (req);	937	req->type = EIO_MKNOD;
		938	req->sv1 = newSVsv (pathname);
		939	req->ptr1 = SvPVbyte_nolen (req->sv1);
		940	req->int2 = (mode_t)mode;
		941	req->offs = dev;
		942
		943	REQ_SEND;
734	}	944	}
735		945
736	void	946	void
		947	aio_busy (double delay, SV *callback=&PL_sv_undef)
		948	PPCODE:
		949	{
		950	dREQ;
		951
		952	req->type = EIO_BUSY;
		953	req->nv1 = delay < 0. ? 0. : delay;
		954
		955	REQ_SEND;
		956	}
		957
		958	void
		959	aio_group (SV *callback=&PL_sv_undef)
		960	PROTOTYPE: ;$
		961	PPCODE:
		962	{
		963	dREQ;
		964
		965	req->type = EIO_GROUP;
		966
		967	req_submit (req);
		968	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		969	}
		970
		971	void
		972	aio_nop (SV *callback=&PL_sv_undef)
		973	ALIAS:
		974	aio_nop = EIO_NOP
		975	aio_sync = EIO_SYNC
		976	PPCODE:
		977	{
		978	dREQ;
		979
		980	req->type = ix;
		981
		982	REQ_SEND;
		983	}
		984
		985	int
		986	aioreq_pri (int pri = 0)
		987	PROTOTYPE: ;$
		988	CODE:
		989	RETVAL = next_pri;
		990	if (items > 0)
		991	{
		992	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		993	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		994	next_pri = pri;
		995	}
		996	OUTPUT:
		997	RETVAL
		998
		999	void
		1000	aioreq_nice (int nice = 0)
		1001	CODE:
		1002	nice = next_pri - nice;
		1003	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1004	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1005	next_pri = nice;
		1006
		1007	void
737	flush()	1008	flush ()
738	PROTOTYPE:	1009	PROTOTYPE:
739	CODE:	1010	CODE:
740	while (nreqs)	1011	while (eio_nreqs ())
741	{	1012	{
742	poll_wait ();	1013	poll_wait ();
743	poll_cb ();	1014	poll_cb ();
744	}	1015	}
745		1016
746	void	1017	int
747	poll()	1018	poll()
748	PROTOTYPE:	1019	PROTOTYPE:
749	CODE:	1020	CODE:
750	if (nreqs)
751	{
752	poll_wait ();	1021	poll_wait ();
753	poll_cb ();	1022	RETVAL = poll_cb ();
754	}	1023	OUTPUT:
		1024	RETVAL
755		1025
756	int	1026	int
757	poll_fileno()	1027	poll_fileno()
758	PROTOTYPE:	1028	PROTOTYPE:
759	CODE:	1029	CODE:
…		…
771		1041
772	void	1042	void
773	poll_wait()	1043	poll_wait()
774	PROTOTYPE:	1044	PROTOTYPE:
775	CODE:	1045	CODE:
776	if (nreqs)
777	poll_wait ();	1046	poll_wait ();
778		1047
779	int	1048	int
780	nreqs()	1049	nreqs()
781	PROTOTYPE:	1050	PROTOTYPE:
782	CODE:	1051	CODE:
783	RETVAL = nreqs;	1052	RETVAL = eio_nreqs ();
784	OUTPUT:	1053	OUTPUT:
785	RETVAL	1054	RETVAL
786		1055
		1056	int
		1057	nready()
		1058	PROTOTYPE:
		1059	CODE:
		1060	RETVAL = eio_nready ();
		1061	OUTPUT:
		1062	RETVAL
		1063
		1064	int
		1065	npending()
		1066	PROTOTYPE:
		1067	CODE:
		1068	RETVAL = eio_npending ();
		1069	OUTPUT:
		1070	RETVAL
		1071
		1072	int
		1073	nthreads()
		1074	PROTOTYPE:
		1075	CODE:
		1076	RETVAL = eio_nthreads ();
		1077	OUTPUT:
		1078	RETVAL
		1079
		1080	void _on_next_submit (SV *cb)
		1081	CODE:
		1082	SvREFCNT_dec (on_next_submit);
		1083	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1084
		1085	PROTOTYPES: DISABLE
		1086
		1087	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1088
		1089	void
		1090	cancel (aio_req_ornot req)
		1091	CODE:
		1092	eio_cancel (req);
		1093
		1094	void
		1095	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1096	PPCODE:
		1097	{
		1098	if (GIMME_V != G_VOID)
		1099	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1100
		1101	if (items > 1)
		1102	{
		1103	SV *cb_cv = get_cb (callback);
		1104
		1105	SvREFCNT_dec (req->callback);
		1106	req->callback = SvREFCNT_inc (cb_cv);
		1107	}
		1108	}
		1109
		1110	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1111
		1112	void
		1113	add (aio_req grp, ...)
		1114	PPCODE:
		1115	{
		1116	int i;
		1117
		1118	if (grp->int1 == 2)
		1119	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1120
		1121	for (i = 1; i < items; ++i )
		1122	{
		1123	aio_req req;
		1124
		1125	if (GIMME_V != G_VOID)
		1126	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1127
		1128	req = SvAIO_REQ (ST (i));
		1129
		1130	if (req)
		1131	eio_grp_add (grp, req);
		1132	}
		1133	}
		1134
		1135	void
		1136	cancel_subs (aio_req_ornot req)
		1137	CODE:
		1138	req_cancel_subs (req);
		1139
		1140	void
		1141	result (aio_req grp, ...)
		1142	CODE:
		1143	{
		1144	int i;
		1145	AV *av;
		1146
		1147	grp->errorno = errno;
		1148
		1149	av = newAV ();
		1150
		1151	for (i = 1; i < items; ++i )
		1152	av_push (av, newSVsv (ST (i)));
		1153
		1154	SvREFCNT_dec (grp->sv1);
		1155	grp->sv1 = (SV *)av;
		1156	}
		1157
		1158	void
		1159	errno (aio_req grp, int errorno = errno)
		1160	CODE:
		1161	grp->errorno = errorno;
		1162
		1163	void
		1164	limit (aio_req grp, int limit)
		1165	CODE:
		1166	eio_grp_limit (grp, limit);
		1167
		1168	void
		1169	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1170	CODE:
		1171	{
		1172	SvREFCNT_dec (grp->sv2);
		1173	grp->sv2 = newSVsv (callback);
		1174	grp->feed = aio_grp_feed;
		1175
		1176	if (grp->int2 <= 0)
		1177	grp->int2 = 2;
		1178
		1179	eio_grp_limit (grp, grp->int2);
		1180	}
		1181

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