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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.33 by root, Mon Aug 22 23:21:57 2005 UTC vs.
Revision 1.131 by root, Sun Oct 12 22:30:33 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
10	#include <pthread.h>	9	#include <stddef.h>
11		10	#include <stdlib.h>
		11	#include <errno.h>
12	#include <sys/types.h>	12	#include <sys/types.h>
13	#include <sys/stat.h>	13	#include <sys/stat.h>
14
15	#include <unistd.h>	14	#include <limits.h>
16	#include <fcntl.h>	15	#include <fcntl.h>
17	#include <signal.h>
18	#include <sched.h>	16	#include <sched.h>
19		17
20	#if HAVE_SENDFILE	18	/* perl namespace pollution */
21	# if __linux	19	#undef VERSION
22	# include <sys/sendfile.h>	20
23	# elif __freebsd	21	#ifdef _WIN32
24	# include <sys/socket.h>	22
		23	# define EIO_STRUCT_DIRENT Direntry_t
		24	# undef malloc
		25	# undef free
		26
		27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
		59	#else
		60
25	# include <sys/uio.h>	61	# include <sys/time.h>
26	# elif __hpux
27	# include <sys/socket.h>	62	# include <sys/select.h>
28	# endif	63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
29	#endif	68	#endif
30		69
31	#if __ia64	70	/* perl stupidly overrides readdir and maybe others */
32	# define STACKSIZE 65536	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
33	#else	81	#else
34	# define STACKSIZE 4096	82	# define SvVAL64 SvNV
35	#endif	83	#endif
36		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
37	enum {	119	enum {
38	REQ_QUIT,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
39	REQ_OPEN, REQ_CLOSE,
40	REQ_READ, REQ_WRITE, REQ_READAHEAD,
41	REQ_SENDFILE,
42	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
43	REQ_FSYNC, REQ_FDATASYNC,
44	REQ_UNLINK, REQ_RMDIR,
45	REQ_SYMLINK,
46	};	121	};
47		122
48	typedef struct aio_cb {	123	#include "libeio/eio.c"
49	struct aio_cb *volatile next;
50		124
51	int type;
52
53	int fd, fd2;
54	off_t offset;
55	size_t length;
56	ssize_t result;
57	mode_t mode; /* open */
58	int errorno;
59	SV *data, *callback;
60	SV *fh, *fh2;
61	void *dataptr, *data2ptr;
62	STRLEN dataoffset;
63
64	Stat_t *statdata;
65	} aio_cb;
66
67	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
		126	typedef eio_req *aio_req_ornot;
68		127
69	static int started, wanted;	128	static SV *on_next_submit;
70	static volatile int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
71	static int max_outstanding = 1<<30;	130	static int max_outstanding;
72	static int respipe [2];
73		131
74	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
75	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
76	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
77		133
78	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
79	static volatile aio_req ress, rese; /* queue start, queue end */
80
81	static void free_req (aio_req req)	135	static void req_cancel (aio_req req);
82	{
83	if (req->data)
84	SvREFCNT_dec (req->data);
85		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	{
86	if (req->fh)	349	if (req->self)
		350	{
		351	sv_unmagic (req->self, PERL_MAGIC_ext);
87	SvREFCNT_dec (req->fh);	352	SvREFCNT_dec (req->self);
		353	}
88		354
89	if (req->fh2)	355	SvREFCNT_dec (req->sv1);
90	SvREFCNT_dec (req->fh2);	356	SvREFCNT_dec (req->sv2);
91
92	if (req->statdata)
93	Safefree (req->statdata);
94
95	if (req->callback)
96	SvREFCNT_dec (req->callback);	357	SvREFCNT_dec (req->callback);
97		358
98	Safefree (req);	359	Safefree (req);
99	}	360	}
100		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
101	static void	381	static void
102	poll_wait ()	382	create_respipe (void)
103	{	383	{
104	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)
105	{	397	{
106	fd_set rfd;	398	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
107	FD_ZERO(&rfd);	399	croak ("unable to initialize result pipe(2)");
108	FD_SET(respipe [0], &rfd);
109		400
110	select (respipe [0] + 1, &rfd, 0, 0, 0);	401	respipe_close (respipe [0]);
		402	respipe [0] = old_readfd;
111	}	403	}
112	}
113		404
114	static int	405	#ifdef _WIN32
115	poll_cb ()	406	int arg = 1;
116	{	407	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
117	dSP;	408	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
118	int count = 0;	409	#else
119	int do_croak = 0;	410	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
120	aio_req req;	411	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		412	#endif
		413	croak ("unable to initialize result pipe(3)");
121		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	{
122	for (;;)	445	for (;;)
123	{	446	{
124	pthread_mutex_lock (&reslock);	447	int res = eio_poll ();
125	req = ress;
126		448
127	if (req)	449	if (res > 0)
128	{
129	ress = req->next;
130
131	if (!ress)
132	{
133	/* read any signals sent by the worker threads */
134	char buf [32];
135	while (read (respipe [0], buf, 32) == 32)
136	;
137
138	rese = 0;
139	}
140	}
141
142	pthread_mutex_unlock (&reslock);
143
144	if (!req)
145	break;
146
147	nreqs--;
148
149	if (req->type == REQ_QUIT)
150	started--;
151	else
152	{
153	int errorno = errno;
154	errno = req->errorno;
155
156	if (req->type == REQ_READ)
157	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
158
159	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
160	SvREADONLY_off (req->data);
161
162	if (req->statdata)
163	{
164	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
165	PL_laststatval = req->result;
166	PL_statcache = *(req->statdata);
167	}
168
169	ENTER;
170	PUSHMARK (SP);
171	XPUSHs (sv_2mortal (newSViv (req->result)));
172
173	if (req->type == REQ_OPEN)
174	{
175	/* convert fd to fh */
176	SV *fh;
177
178	PUTBACK;
179	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
180	SPAGAIN;
181
182	fh = SvREFCNT_inc (POPs);
183
184	PUSHMARK (SP);
185	XPUSHs (sv_2mortal (fh));
186	}
187
188	if (SvOK (req->callback))
189	{
190	PUTBACK;
191	call_sv (req->callback, G_VOID | G_EVAL);
192	SPAGAIN;
193
194	if (SvTRUE (ERRSV))
195	{
196	free_req (req);
197	croak (0);	450	croak (0);
198	}
199	}
200		451
201	LEAVE;	452	if (!max_outstanding || max_outstanding > eio_nreqs ())
		453	return res;
202		454
203	errno = errorno;	455	poll_wait ();
204	count++;
205	}
206
207	free_req (req);
208	}	456	}
209
210	return count;
211	}
212
213	static void *aio_proc(void *arg);
214
215	static void
216	start_thread (void)
217	{
218	sigset_t fullsigset, oldsigset;
219	pthread_t tid;
220	pthread_attr_t attr;
221
222	pthread_attr_init (&attr);
223	pthread_attr_setstacksize (&attr, STACKSIZE);
224	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
225
226	sigfillset (&fullsigset);
227	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
228
229	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
230	started++;
231
232	sigprocmask (SIG_SETMASK, &oldsigset, 0);
233	}
234
235	static void
236	send_req (aio_req req)
237	{
238	while (started < wanted && nreqs >= started)
239	start_thread ();
240
241	nreqs++;
242
243	pthread_mutex_lock (&reqlock);
244
245	req->next = 0;
246
247	if (reqe)
248	{
249	reqe->next = req;
250	reqe = req;
251	}
252	else
253	reqe = reqs = req;
254
255	pthread_cond_signal (&reqwait);
256	pthread_mutex_unlock (&reqlock);
257
258	if (nreqs > max_outstanding)
259	for (;;)
260	{
261	poll_cb ();
262
263	if (nreqs <= max_outstanding)
264	break;
265
266	poll_wait ();
267	}
268	}
269
270	static void
271	end_thread (void)
272	{
273	aio_req req;
274	Newz (0, req, 1, aio_cb);
275	req->type = REQ_QUIT;
276
277	send_req (req);
278	}
279
280	static void min_parallel (int nthreads)
281	{
282	if (wanted < nthreads)
283	wanted = nthreads;
284	}
285
286	static void max_parallel (int nthreads)
287	{
288	int cur = started;
289
290	if (wanted > nthreads)
291	wanted = nthreads;
292
293	while (cur > wanted)
294	{
295	end_thread ();
296	cur--;
297	}
298
299	while (started > wanted)
300	{
301	poll_wait ();
302	poll_cb ();
303	}
304	}
305
306	static void create_pipe ()
307	{
308	if (pipe (respipe))
309	croak ("unable to initialize result pipe");
310
311	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
312	croak ("cannot set result pipe to nonblocking mode");
313
314	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
315	croak ("cannot set result pipe to nonblocking mode");
316	}
317
318	static void atfork_prepare (void)
319	{
320	pthread_mutex_lock (&reqlock);
321	pthread_mutex_lock (&reslock);
322	}
323
324	static void atfork_parent (void)
325	{
326	pthread_mutex_unlock (&reslock);
327	pthread_mutex_unlock (&reqlock);
328	}	457	}
329		458
330	static void atfork_child (void)	459	static void atfork_child (void)
331	{	460	{
332	aio_req prv;
333
334	started = 0;
335
336	while (reqs)
337	{
338	prv = reqs;
339	reqs = prv->next;
340	free_req (prv);
341	}
342
343	reqs = reqe = 0;
344
345	while (ress)
346	{
347	prv = ress;
348	ress = prv->next;
349	free_req (prv);
350	}
351
352	ress = rese = 0;
353
354	close (respipe [0]);
355	close (respipe [1]);
356	create_pipe ();	461	create_respipe ();
357
358	atfork_parent ();
359	}	462	}
360		463
361	/*****************************************************************************/	464	static SV *
362	/* work around various missing functions */	465	get_cb (SV *cb_sv)
363
364	#if !HAVE_PREADWRITE
365	# define pread aio_pread
366	# define pwrite aio_pwrite
367
368	/*
369	* make our pread/pwrite safe against themselves, but not against
370	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.
372	*/
373	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
374
375	static ssize_t
376	pread (int fd, void *buf, size_t count, off_t offset)
377	{	466	{
378	ssize_t res;	467	HV *st;
379	off_t ooffset;	468	GV *gvp;
		469	CV *cv;
380		470
381	pthread_mutex_lock (&iolock);	471	if (!SvOK (cb_sv))
382	ooffset = lseek (fd, 0, SEEK_CUR);
383	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&iolock);
387
388	return res;
389	}
390
391	static ssize_t
392	pwrite (int fd, void *buf, size_t count, off_t offset)
393	{
394	ssize_t res;
395	off_t ooffset;
396
397	pthread_mutex_lock (&iolock);
398	ooffset = lseek (fd, 0, SEEK_CUR);
399	lseek (fd, offset, SEEK_SET);
400	res = write (fd, buf, count);
401	lseek (fd, offset, SEEK_SET);
402	pthread_mutex_unlock (&iolock);
403
404	return res;
405	}
406	#endif
407
408	#if !HAVE_FDATASYNC
409	# define fdatasync fsync
410	#endif
411
412	#if !HAVE_READAHEAD
413	# define readahead aio_readahead
414
415	static char readahead_buf[4096];
416
417	static ssize_t
418	readahead (int fd, off_t offset, size_t count)
419	{
420	while (count > 0)
421	{
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
423
424	pread (fd, readahead_buf, len, offset);
425	offset += len;
426	count -= len;
427	}
428
429	errno = 0;
430	}
431	#endif
432
433	/* sendfile always needs emulation */
434	static ssize_t
435	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
436	{
437	ssize_t res;
438
439	if (!count)
440	return 0;	472	return 0;
441		473
442	#if __linux	474	cv = sv_2cv (cb_sv, &st, &gvp, 0);
443	res = sendfile (ofd, ifd, &offset, count);
444		475
445	#elif __freebsd	476	if (!cv)
446	/*	477	croak ("IO::AIO callback must be undef or a CODE reference");
447	* Of course, the freebsd sendfile is a dire hack with no thoughts
448	* wasted on making it similar to other i/o functions.
449	*/
450	{
451	off_t sbytes;
452	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
453		478
454	if (!res && errno == EAGAIN)	479	return (SV *)cv;
455	/* maybe on others, too, as usual, the manpage leaves you guessing */
456	res = sbytes;
457	}
458
459	#elif __hpux
460	res = sendfile (ofd, ifd, offset, count, 0, 0);
461
462	#else
463	res = -1;
464	errno = ENOSYS;
465	#endif
466
467	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))
468	{
469	/* emulate sendfile. this is a major pain in the ass */
470	char *buf = malloc (4096);
471	res = 0;
472
473	for (;;)
474	{
475	ssize_t cnt;
476
477	cnt = pread (ifd, buf, 4096, offset);
478
479	if (cnt <= 0)
480	{
481	if (cnt && !res) res = -1;
482	break;
483	}
484
485	cnt = write (ofd, buf, cnt);
486
487	if (cnt <= 0)
488	{
489	if (cnt && !res) res = -1;
490	break;
491	}
492
493	offset += cnt;
494	res += cnt;
495	}
496
497	{
498	int errorno = errno;
499	free (buf);
500	errno = errorno;
501	}
502	}
503
504	return res;
505	}
506
507	/*****************************************************************************/
508
509	static void *
510	aio_proc (void *thr_arg)
511	{
512	aio_req req;
513	int type;
514
515	do
516	{
517	pthread_mutex_lock (&reqlock);
518
519	for (;;)
520	{
521	req = reqs;
522
523	if (reqs)
524	{
525	reqs = reqs->next;
526	if (!reqs) reqe = 0;
527	}
528
529	if (req)
530	break;
531
532	pthread_cond_wait (&reqwait, &reqlock);
533	}
534
535	pthread_mutex_unlock (&reqlock);
536
537	errno = 0; /* strictly unnecessary */
538
539	type = req->type;
540
541	switch (type)
542	{
543	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
544	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
545
546	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
547	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
548
549	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
550	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
551	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
552
553	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
554	case REQ_CLOSE: req->result = close (req->fd); break;
555	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
556	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
557	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
558
559	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
560	case REQ_FSYNC: req->result = fsync (req->fd); break;
561
562	case REQ_QUIT:
563	break;
564
565	default:
566	req->result = ENOSYS;
567	break;
568	}
569
570	req->errorno = errno;
571
572	pthread_mutex_lock (&reslock);
573
574	req->next = 0;
575
576	if (rese)
577	{
578	rese->next = req;
579	rese = req;
580	}
581	else
582	{
583	rese = ress = req;
584
585	/* write a dummy byte to the pipe so fh becomes ready */
586	write (respipe [1], &respipe, 1);
587	}
588
589	pthread_mutex_unlock (&reslock);
590	}
591	while (type != REQ_QUIT);
592
593	return 0;
594	}	480	}
595		481
596	#define dREQ \	482	#define dREQ \
		483	SV *cb_cv; \
597	aio_req req; \	484	aio_req req; \
		485	int req_pri = next_pri; \
		486	next_pri = EIO_PRI_DEFAULT; \
598	\	487	\
599	if (SvOK (callback) && !SvROK (callback)) \	488	cb_cv = get_cb (callback); \
600	croak ("clalback must be undef or of reference type"); \
601	\	489	\
602	Newz (0, req, 1, aio_cb); \	490	Newz (0, req, 1, eio_req); \
603	if (!req) \	491	if (!req) \
604	croak ("out of memory during aio_req allocation"); \	492	croak ("out of memory during eio_req allocation"); \
605	\	493	\
606	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));
607		504
608	MODULE = IO::AIO PACKAGE = IO::AIO	505	MODULE = IO::AIO PACKAGE = IO::AIO
609		506
610	PROTOTYPES: ENABLE	507	PROTOTYPES: ENABLE
611		508
612	BOOT:	509	BOOT:
613	{	510	{
614	create_pipe ();	511	stash = gv_stashpv ("IO::AIO", 1);
615	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
616	}
617		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
		522	create_respipe ();
		523
		524	if (eio_init (want_poll, done_poll) < 0)
		525	croak ("IO::AIO: unable to initialise eio library");
		526
		527	/* atfork child called in fifo order, so before eio's handler */
		528	X_THREAD_ATFORK (0, 0, atfork_child);
		529	}
		530
618	void	531	void
619	min_parallel(nthreads)	532	max_poll_reqs (int nreqs)
620	int nthreads
621	PROTOTYPE: $	533	PROTOTYPE: $
		534	CODE:
		535	eio_set_max_poll_reqs (nreqs);
622		536
623	void	537	void
624	max_parallel(nthreads)	538	max_poll_time (double nseconds)
625	int nthreads
626	PROTOTYPE: $	539	PROTOTYPE: $
627
628	int
629	max_outstanding(nreqs)
630	int nreqs
631	PROTOTYPE: $
632	CODE:	540	CODE:
633	RETVAL = max_outstanding;	541	eio_set_max_poll_time (nseconds);
		542
		543	void
		544	min_parallel (int nthreads)
		545	PROTOTYPE: $
		546	CODE:
		547	eio_set_min_parallel (nthreads);
		548
		549	void
		550	max_parallel (int nthreads)
		551	PROTOTYPE: $
		552	CODE:
		553	eio_set_max_parallel (nthreads);
		554
		555	void
		556	max_idle (int nthreads)
		557	PROTOTYPE: $
		558	CODE:
		559	eio_set_max_idle (nthreads);
		560
		561	void
		562	max_outstanding (int maxreqs)
		563	PROTOTYPE: $
		564	CODE:
634	max_outstanding = nreqs;	565	max_outstanding = maxreqs;
635		566
636	void	567	void
637	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	568	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
638	SV * pathname
639	int flags
640	int mode
641	SV * callback
642	PROTOTYPE: $$$;$	569	PROTOTYPE: $$$;$
643	CODE:	570	PPCODE:
644	{	571	{
645	dREQ;	572	dREQ;
646		573
647	req->type = REQ_OPEN;	574	req->type = EIO_OPEN;
648	req->data = newSVsv (pathname);	575	req->sv1 = newSVsv (pathname);
649	req->dataptr = SvPVbyte_nolen (req->data);	576	req->ptr1 = SvPVbyte_nolen (req->sv1);
650	req->fd = flags;	577	req->int1 = flags;
651	req->mode = mode;	578	req->int2 = mode;
652		579
653	send_req (req);	580	REQ_SEND;
654	}	581	}
655		582
656	void	583	void
657	aio_close(fh,callback=&PL_sv_undef)	584	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
658	SV * fh
659	SV * callback
660	PROTOTYPE: $;$	585	PROTOTYPE: $;$
661	ALIAS:	586	ALIAS:
662	aio_close = REQ_CLOSE
663	aio_fsync = REQ_FSYNC	587	aio_fsync = EIO_FSYNC
664	aio_fdatasync = REQ_FDATASYNC	588	aio_fdatasync = EIO_FDATASYNC
665	CODE:	589	PPCODE:
666	{	590	{
667	dREQ;	591	dREQ;
668		592
669	req->type = ix;	593	req->type = ix;
670	req->fh = newSVsv (fh);	594	req->sv1 = newSVsv (fh);
671	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	595	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
672		596
673	send_req (req);	597	REQ_SEND (req);
674	}	598	}
675		599
676	void	600	void
		601	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		602	PROTOTYPE: $;$
		603	PPCODE:
		604	{
		605	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		606	dREQ;
		607
		608	if (close_pipe < 0)
		609	{
		610	int pipefd [2];
		611
		612	if (pipe (pipefd) < 0
		613	|| close (pipefd [1]) < 0
		614	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		615	abort (); /*D*/
		616
		617	close_pipe = pipefd [0];
		618	}
		619
		620	req->type = EIO_DUP2;
		621	req->int1 = close_pipe;
		622	req->sv2 = newSVsv (fh);
		623	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		624
		625	REQ_SEND (req);
		626	}
		627
		628	void
677	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	629	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
678	SV * fh
679	UV offset
680	UV length
681	SV * data
682	UV dataoffset
683	SV * callback
684	ALIAS:	630	ALIAS:
685	aio_read = REQ_READ	631	aio_read = EIO_READ
686	aio_write = REQ_WRITE	632	aio_write = EIO_WRITE
687	PROTOTYPE: $$$$$;$	633	PROTOTYPE: $$$$$;$
688	CODE:	634	PPCODE:
689	{	635	{
690	aio_req req;
691	STRLEN svlen;	636	STRLEN svlen;
692	char *svptr = SvPVbyte (data, svlen);	637	char *svptr = SvPVbyte (data, svlen);
		638	UV len = SvUV (length);
693		639
694	SvUPGRADE (data, SVt_PV);	640	SvUPGRADE (data, SVt_PV);
695	SvPOK_on (data);	641	SvPOK_on (data);
696		642
697	if (dataoffset < 0)	643	if (dataoffset < 0)
698	dataoffset += svlen;	644	dataoffset += svlen;
699		645
700	if (dataoffset < 0 || dataoffset > svlen)	646	if (dataoffset < 0 || dataoffset > svlen)
701	croak ("data offset outside of string");	647	croak ("dataoffset outside of data scalar");
702		648
703	if (ix == REQ_WRITE)	649	if (ix == EIO_WRITE)
704	{	650	{
705	/* write: check length and adjust. */	651	/* write: check length and adjust. */
706	if (length < 0 || length + dataoffset > svlen)	652	if (!SvOK (length) || len + dataoffset > svlen)
707	length = svlen - dataoffset;	653	len = svlen - dataoffset;
708	}	654	}
709	else	655	else
710	{	656	{
711	/* read: grow scalar as necessary */	657	/* read: grow scalar as necessary */
712	svptr = SvGROW (data, length + dataoffset);	658	svptr = SvGROW (data, len + dataoffset + 1);
713	}	659	}
714		660
715	if (length < 0)	661	if (len < 0)
716	croak ("length must not be negative");	662	croak ("length must not be negative");
717		663
718	{	664	{
719	dREQ;	665	dREQ;
720		666
721	req->type = ix;	667	req->type = ix;
722	req->fh = newSVsv (fh);	668	req->sv1 = newSVsv (fh);
723	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	669	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
724	: IoOFP (sv_2io (fh)));	670	: IoOFP (sv_2io (fh)));
		671	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
725	req->offset = offset;	672	req->size = len;
726	req->length = length;
727	req->data = SvREFCNT_inc (data);	673	req->sv2 = SvREFCNT_inc_NN (data);
728	req->dataptr = (char *)svptr + dataoffset;	674	req->ptr2 = (char *)svptr + dataoffset;
		675	req->stroffset = dataoffset;
729		676
730	if (!SvREADONLY (data))	677	if (!SvREADONLY (data))
731	{	678	{
732	SvREADONLY_on (data);	679	SvREADONLY_on (data);
733	req->data2ptr = (void *)data;	680	req->flags |= FLAG_SV2_RO_OFF;
734	}	681	}
735		682
736	send_req (req);	683	REQ_SEND;
737	}	684	}
738	}	685	}
739		686
740	void	687	void
		688	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		689	PROTOTYPE: $$;$
		690	PPCODE:
		691	{
		692	SV *data;
		693	dREQ;
		694
		695	req->type = EIO_READLINK;
		696	req->sv1 = newSVsv (path);
		697	req->ptr1 = SvPVbyte_nolen (req->sv1);
		698
		699	REQ_SEND;
		700	}
		701
		702	void
741	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	703	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
742	SV * out_fh
743	SV * in_fh
744	UV in_offset
745	UV length
746	SV * callback
747	PROTOTYPE: $$$$;$	704	PROTOTYPE: $$$$;$
748	CODE:	705	PPCODE:
749	{	706	{
750	dREQ;	707	dREQ;
751		708
752	req->type = REQ_SENDFILE;	709	req->type = EIO_SENDFILE;
753	req->fh = newSVsv (out_fh);	710	req->sv1 = newSVsv (out_fh);
754	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	711	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
755	req->fh2 = newSVsv (in_fh);	712	req->sv2 = newSVsv (in_fh);
756	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	713	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
757	req->offset = in_offset;	714	req->offs = SvVAL64 (in_offset);
758	req->length = length;	715	req->size = length;
759		716
760	send_req (req);	717	REQ_SEND;
761	}	718	}
762		719
763	void	720	void
764	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	721	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
765	SV * fh
766	UV offset
767	IV length
768	SV * callback
769	PROTOTYPE: $$$;$	722	PROTOTYPE: $$$;$
770	CODE:	723	PPCODE:
771	{	724	{
772	dREQ;	725	dREQ;
773		726
774	req->type = REQ_READAHEAD;	727	req->type = EIO_READAHEAD;
775	req->fh = newSVsv (fh);	728	req->sv1 = newSVsv (fh);
776	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	729	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
777	req->offset = offset;	730	req->offs = SvVAL64 (offset);
778	req->length = length;	731	req->size = length;
779		732
780	send_req (req);	733	REQ_SEND;
781	}	734	}
782		735
783	void	736	void
784	aio_stat(fh_or_path,callback=&PL_sv_undef)	737	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
785	SV * fh_or_path
786	SV * callback
787	ALIAS:	738	ALIAS:
788	aio_stat = REQ_STAT	739	aio_stat = EIO_STAT
789	aio_lstat = REQ_LSTAT	740	aio_lstat = EIO_LSTAT
790	CODE:	741	PPCODE:
791	{	742	{
792	dREQ;	743	dREQ;
793		744
794	New (0, req->statdata, 1, Stat_t);	745	req->sv1 = newSVsv (fh_or_path);
795	if (!req->statdata)
796	{
797	free_req (req);
798	croak ("out of memory during aio_req->statdata allocation");
799	}
800		746
801	if (SvPOK (fh_or_path))	747	if (SvPOK (req->sv1))
802	{	748	{
803	req->type = ix;	749	req->type = ix;
804	req->data = newSVsv (fh_or_path);
805	req->dataptr = SvPVbyte_nolen (req->data);	750	req->ptr1 = SvPVbyte_nolen (req->sv1);
806	}	751	}
807	else	752	else
808	{	753	{
809	req->type = REQ_FSTAT;	754	req->type = EIO_FSTAT;
810	req->fh = newSVsv (fh_or_path);
811	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	755	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		756	}
		757
		758	REQ_SEND;
		759	}
		760
		761	void
		762	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		763	PPCODE:
		764	{
		765	dREQ;
		766
		767	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		768	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		769	req->sv1 = newSVsv (fh_or_path);
		770
		771	if (SvPOK (req->sv1))
812	}	772	{
		773	req->type = EIO_UTIME;
		774	req->ptr1 = SvPVbyte_nolen (req->sv1);
		775	}
		776	else
		777	{
		778	req->type = EIO_FUTIME;
		779	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		780	}
813		781
814	send_req (req);	782	REQ_SEND;
815	}	783	}
816		784
817	void	785	void
		786	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		787	PPCODE:
		788	{
		789	dREQ;
		790
		791	req->sv1 = newSVsv (fh_or_path);
		792	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		793
		794	if (SvPOK (req->sv1))
		795	{
		796	req->type = EIO_TRUNCATE;
		797	req->ptr1 = SvPVbyte_nolen (req->sv1);
		798	}
		799	else
		800	{
		801	req->type = EIO_FTRUNCATE;
		802	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		803	}
		804
		805	REQ_SEND;
		806	}
		807
		808	void
		809	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		810	ALIAS:
		811	aio_chmod = EIO_CHMOD
		812	aio_mkdir = EIO_MKDIR
		813	PPCODE:
		814	{
		815	dREQ;
		816
		817	req->int2 = mode;
		818	req->sv1 = newSVsv (fh_or_path);
		819
		820	if (SvPOK (req->sv1))
		821	{
		822	req->type = ix;
		823	req->ptr1 = SvPVbyte_nolen (req->sv1);
		824	}
		825	else
		826	{
		827	req->type = EIO_FCHMOD;
		828	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		829	}
		830
		831	REQ_SEND;
		832	}
		833
		834	void
		835	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		836	PPCODE:
		837	{
		838	dREQ;
		839
		840	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		841	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		842	req->sv1 = newSVsv (fh_or_path);
		843
		844	if (SvPOK (req->sv1))
		845	{
		846	req->type = EIO_CHOWN;
		847	req->ptr1 = SvPVbyte_nolen (req->sv1);
		848	}
		849	else
		850	{
		851	req->type = EIO_FCHOWN;
		852	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		853	}
		854
		855	REQ_SEND;
		856	}
		857
		858	void
818	aio_unlink(pathname,callback=&PL_sv_undef)	859	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
819	SV * pathname
820	SV * callback
821	ALIAS:	860	ALIAS:
822	aio_unlink = REQ_UNLINK	861	aio_unlink = EIO_UNLINK
823	aio_rmdir = REQ_RMDIR	862	aio_rmdir = EIO_RMDIR
		863	aio_readdir = EIO_READDIR
824	CODE:	864	PPCODE:
825	{	865	{
826	dREQ;	866	dREQ;
827		867
828	req->type = ix;	868	req->type = ix;
829	req->data = newSVsv (pathname);	869	req->sv1 = newSVsv (pathname);
830	req->dataptr = SvPVbyte_nolen (req->data);	870	req->ptr1 = SvPVbyte_nolen (req->sv1);
		871
		872	REQ_SEND;
		873	}
		874
		875	void
		876	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		877	ALIAS:
		878	aio_link = EIO_LINK
		879	aio_symlink = EIO_SYMLINK
		880	aio_rename = EIO_RENAME
		881	PPCODE:
		882	{
		883	dREQ;
831		884
832	send_req (req);	885	req->type = ix;
833	}	886	req->sv1 = newSVsv (oldpath);
834		887	req->ptr1 = SvPVbyte_nolen (req->sv1);
835	void	888	req->sv2 = newSVsv (newpath);
836	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	889	req->ptr2 = SvPVbyte_nolen (req->sv2);
837	SV * oldpath
838	SV * newpath
839	SV * callback
840	CODE:
841	{
842	dREQ;
843		890
844	req->type = REQ_SYMLINK;	891	REQ_SEND;
845	req->fh = newSVsv (oldpath);	892	}
846	req->data2ptr = SvPVbyte_nolen (req->fh);	893
847	req->data = newSVsv (newpath);	894	void
848	req->dataptr = SvPVbyte_nolen (req->data);	895	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		896	PPCODE:
		897	{
		898	dREQ;
849		899
850	send_req (req);	900	req->type = EIO_MKNOD;
		901	req->sv1 = newSVsv (pathname);
		902	req->ptr1 = SvPVbyte_nolen (req->sv1);
		903	req->int2 = (mode_t)mode;
		904	req->offs = dev;
		905
		906	REQ_SEND;
851	}	907	}
852		908
853	void	909	void
		910	aio_busy (double delay, SV *callback=&PL_sv_undef)
		911	PPCODE:
		912	{
		913	dREQ;
		914
		915	req->type = EIO_BUSY;
		916	req->nv1 = delay < 0. ? 0. : delay;
		917
		918	REQ_SEND;
		919	}
		920
		921	void
		922	aio_group (SV *callback=&PL_sv_undef)
		923	PROTOTYPE: ;$
		924	PPCODE:
		925	{
		926	dREQ;
		927
		928	req->type = EIO_GROUP;
		929
		930	req_submit (req);
		931	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		932	}
		933
		934	void
		935	aio_nop (SV *callback=&PL_sv_undef)
		936	ALIAS:
		937	aio_nop = EIO_NOP
		938	aio_sync = EIO_SYNC
		939	PPCODE:
		940	{
		941	dREQ;
		942
		943	req->type = ix;
		944
		945	REQ_SEND;
		946	}
		947
		948	int
		949	aioreq_pri (int pri = 0)
		950	PROTOTYPE: ;$
		951	CODE:
		952	RETVAL = next_pri;
		953	if (items > 0)
		954	{
		955	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		956	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		957	next_pri = pri;
		958	}
		959	OUTPUT:
		960	RETVAL
		961
		962	void
		963	aioreq_nice (int nice = 0)
		964	CODE:
		965	nice = next_pri - nice;
		966	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		967	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		968	next_pri = nice;
		969
		970	void
854	flush()	971	flush ()
855	PROTOTYPE:	972	PROTOTYPE:
856	CODE:	973	CODE:
857	while (nreqs)	974	while (eio_nreqs ())
858	{	975	{
859	poll_wait ();	976	poll_wait ();
860	poll_cb ();	977	poll_cb ();
861	}	978	}
862		979
863	void	980	int
864	poll()	981	poll()
865	PROTOTYPE:	982	PROTOTYPE:
866	CODE:	983	CODE:
867	if (nreqs)
868	{
869	poll_wait ();	984	poll_wait ();
870	poll_cb ();	985	RETVAL = poll_cb ();
871	}	986	OUTPUT:
		987	RETVAL
872		988
873	int	989	int
874	poll_fileno()	990	poll_fileno()
875	PROTOTYPE:	991	PROTOTYPE:
876	CODE:	992	CODE:
…		…
888		1004
889	void	1005	void
890	poll_wait()	1006	poll_wait()
891	PROTOTYPE:	1007	PROTOTYPE:
892	CODE:	1008	CODE:
893	if (nreqs)
894	poll_wait ();	1009	poll_wait ();
895		1010
896	int	1011	int
897	nreqs()	1012	nreqs()
898	PROTOTYPE:	1013	PROTOTYPE:
899	CODE:	1014	CODE:
900	RETVAL = nreqs;	1015	RETVAL = eio_nreqs ();
901	OUTPUT:	1016	OUTPUT:
902	RETVAL	1017	RETVAL
903		1018
		1019	int
		1020	nready()
		1021	PROTOTYPE:
		1022	CODE:
		1023	RETVAL = eio_nready ();
		1024	OUTPUT:
		1025	RETVAL
		1026
		1027	int
		1028	npending()
		1029	PROTOTYPE:
		1030	CODE:
		1031	RETVAL = eio_npending ();
		1032	OUTPUT:
		1033	RETVAL
		1034
		1035	int
		1036	nthreads()
		1037	PROTOTYPE:
		1038	CODE:
		1039	RETVAL = eio_nthreads ();
		1040	OUTPUT:
		1041	RETVAL
		1042
		1043	void _on_next_submit (SV *cb)
		1044	CODE:
		1045	SvREFCNT_dec (on_next_submit);
		1046	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1047
		1048	PROTOTYPES: DISABLE
		1049
		1050	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1051
		1052	void
		1053	cancel (aio_req_ornot req)
		1054	CODE:
		1055	eio_cancel (req);
		1056
		1057	void
		1058	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1059	PPCODE:
		1060	{
		1061	if (GIMME_V != G_VOID)
		1062	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1063
		1064	if (items > 1)
		1065	{
		1066	SV *cb_cv = get_cb (callback);
		1067
		1068	SvREFCNT_dec (req->callback);
		1069	req->callback = SvREFCNT_inc (cb_cv);
		1070	}
		1071	}
		1072
		1073	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1074
		1075	void
		1076	add (aio_req grp, ...)
		1077	PPCODE:
		1078	{
		1079	int i;
		1080
		1081	if (grp->int1 == 2)
		1082	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1083
		1084	for (i = 1; i < items; ++i )
		1085	{
		1086	aio_req req;
		1087
		1088	if (GIMME_V != G_VOID)
		1089	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1090
		1091	req = SvAIO_REQ (ST (i));
		1092
		1093	if (req)
		1094	eio_grp_add (grp, req);
		1095	}
		1096	}
		1097
		1098	void
		1099	cancel_subs (aio_req_ornot req)
		1100	CODE:
		1101	req_cancel_subs (req);
		1102
		1103	void
		1104	result (aio_req grp, ...)
		1105	CODE:
		1106	{
		1107	int i;
		1108	AV *av;
		1109
		1110	grp->errorno = errno;
		1111
		1112	av = newAV ();
		1113
		1114	for (i = 1; i < items; ++i )
		1115	av_push (av, newSVsv (ST (i)));
		1116
		1117	SvREFCNT_dec (grp->sv1);
		1118	grp->sv1 = (SV *)av;
		1119	}
		1120
		1121	void
		1122	errno (aio_req grp, int errorno = errno)
		1123	CODE:
		1124	grp->errorno = errorno;
		1125
		1126	void
		1127	limit (aio_req grp, int limit)
		1128	CODE:
		1129	eio_grp_limit (grp, limit);
		1130
		1131	void
		1132	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1133	CODE:
		1134	{
		1135	SvREFCNT_dec (grp->sv2);
		1136	grp->sv2 = newSVsv (callback);
		1137	grp->feed = aio_grp_feed;
		1138
		1139	if (grp->int2 <= 0)
		1140	grp->int2 = 2;
		1141
		1142	eio_grp_limit (grp, grp->int2);
		1143	}
		1144

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