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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.32 by root, Mon Aug 22 23:20:37 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
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	{
		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	{
86	if (req->fh)	353	if (req->self)
		354	{
		355	sv_unmagic (req->self, PERL_MAGIC_ext);
87	SvREFCNT_dec (req->fh);	356	SvREFCNT_dec (req->self);
		357	}
88		358
89	if (req->fh2)	359	SvREFCNT_dec (req->sv1);
90	SvREFCNT_dec (req->fh2);	360	SvREFCNT_dec (req->sv2);
91
92	if (req->statdata)
93	Safefree (req->statdata);
94
95	if (req->callback)
96	SvREFCNT_dec (req->callback);	361	SvREFCNT_dec (req->callback);
97		362
98	Safefree (req);	363	Safefree (req);
99	}	364	}
100		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
101	static void	385	static void
102	poll_wait ()	386	create_respipe (void)
103	{	387	{
104	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)
105	{	401	{
106	fd_set rfd;	402	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
107	FD_ZERO(&rfd);	403	croak ("unable to initialize result pipe(2)");
108	FD_SET(respipe [0], &rfd);
109		404
110	select (respipe [0] + 1, &rfd, 0, 0, 0);	405	respipe_close (respipe [0]);
		406	respipe [0] = old_readfd;
111	}	407	}
112	}
113		408
114	static int	409	#ifdef _WIN32
115	poll_cb ()	410	int arg = 1;
116	{	411	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
117	dSP;	412	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
118	int count = 0;	413	#else
119	int do_croak = 0;	414	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
120	aio_req req;	415	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		416	#endif
		417	croak ("unable to initialize result pipe(3)");
121		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	{
122	for (;;)	449	for (;;)
123	{	450	{
124	pthread_mutex_lock (&reslock);	451	int res = eio_poll ();
125	req = ress;
126		452
127	if (req)	453	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);	454	croak (0);
198	}
199	}
200		455
201	LEAVE;	456	if (!max_outstanding || max_outstanding > eio_nreqs ())
		457	return res;
202		458
203	errno = errorno;	459	poll_wait ();
204	count++;
205	}
206
207	free_req (req);
208	}	460	}
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	}	461	}
329		462
330	static void atfork_child (void)	463	static void atfork_child (void)
331	{	464	{
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 ();	465	create_respipe ();
357
358	atfork_parent ();
359	}	466	}
360		467
361	/*****************************************************************************/	468	static SV *
362	/* work around various missing functions */	469	get_cb (SV *cb_sv)
		470	{
		471	HV *st;
		472	GV *gvp;
		473	CV *cv;
363		474
364	#if !HAVE_PREADWRITE	475	if (!SvOK (cb_sv))
365	# define pread aio_pread	476	return 0;
366	# define pwrite aio_pwrite
367		477
368	/*	478	cv = sv_2cv (cb_sv, &st, &gvp, 0);
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		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
375	static ssize_t	509	static int
376	pread (int fd, void *buf, size_t count, off_t offset)	510	extract_fd (SV *fh, int wr)
377	{	511	{
378	ssize_t res;	512	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
379	off_t ooffset;
380		513
381	pthread_mutex_lock (&iolock);	514	if (fd < 0)
382	ooffset = lseek (fd, 0, SEEK_CUR);	515	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
383	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&iolock);
387		516
388	return res;	517	return fd;
389	}	518	}
390		519
391	static ssize_t	520	MODULE = IO::AIO PACKAGE = IO::AIO
392	pwrite (int fd, void *buf, size_t count, off_t offset)
393	{
394	ssize_t res;
395	off_t ooffset;
396		521
397	pthread_mutex_lock (&iolock);	522	PROTOTYPES: ENABLE
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		523
404	return res;	524	BOOT:
405	}	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));
406	#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));
407		540
408	#if !HAVE_FDATASYNC	541	create_respipe ();
409	# define fdatasync fsync
410	#endif
411		542
412	#if !HAVE_READAHEAD	543	if (eio_init (want_poll, done_poll) < 0)
413	# define readahead aio_readahead	544	croak ("IO::AIO: unable to initialise eio library");
414		545
415	static char readahead_buf[4096];	546	/* atfork child called in fifo order, so before eio's handler */
416		547	X_THREAD_ATFORK (0, 0, atfork_child);
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	}	548	}
431	#endif
432		549
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;
441
442	#if __linux
443	res = sendfile (ofd, ifd, &offset, count);
444
445	#elif __freebsd
446	/*
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
454	if (!res && errno == EAGAIN)
455	res = sbytes;
456	}
457
458	#elif __hpux
459	res = sendfile (ofd, ifd, offset, count, 0, 0);
460
461	#else
462	res = -1;
463	errno = ENOSYS;
464	#endif
465
466	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))
467	{
468	/* emulate sendfile. this is a major pain in the ass */
469	char *buf = malloc (4096);
470	res = 0;
471
472	for (;;)
473	{
474	ssize_t cnt;
475
476	cnt = pread (ifd, buf, 4096, offset);
477
478	if (cnt <= 0)
479	{
480	if (cnt && !res) res = -1;
481	break;
482	}
483
484	cnt = write (ofd, buf, cnt);
485
486	if (cnt <= 0)
487	{
488	if (cnt && !res) res = -1;
489	break;
490	}
491
492	offset += cnt;
493	res += cnt;
494	}
495
496	{
497	int errorno = errno;
498	free (buf);
499	errno = errorno;
500	}
501	}
502
503	return res;
504	}
505
506	/*****************************************************************************/
507
508	static void *
509	aio_proc (void *thr_arg)
510	{
511	aio_req req;
512	int type;
513
514	do
515	{
516	pthread_mutex_lock (&reqlock);
517
518	for (;;)
519	{
520	req = reqs;
521
522	if (reqs)
523	{
524	reqs = reqs->next;
525	if (!reqs) reqe = 0;
526	}
527
528	if (req)
529	break;
530
531	pthread_cond_wait (&reqwait, &reqlock);
532	}
533
534	pthread_mutex_unlock (&reqlock);
535
536	errno = 0; /* strictly unnecessary */
537
538	type = req->type;
539
540	switch (type)
541	{
542	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
543	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
544
545	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
546	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
547
548	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
549	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
550	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
551
552	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
553	case REQ_CLOSE: req->result = close (req->fd); break;
554	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
555	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
556	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
557
558	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
559	case REQ_FSYNC: req->result = fsync (req->fd); break;
560
561	case REQ_QUIT:
562	break;
563
564	default:
565	req->result = ENOSYS;
566	break;
567	}
568
569	req->errorno = errno;
570
571	pthread_mutex_lock (&reslock);
572
573	req->next = 0;
574
575	if (rese)
576	{
577	rese->next = req;
578	rese = req;
579	}
580	else
581	{
582	rese = ress = req;
583
584	/* write a dummy byte to the pipe so fh becomes ready */
585	write (respipe [1], &respipe, 1);
586	}
587
588	pthread_mutex_unlock (&reslock);
589	}
590	while (type != REQ_QUIT);
591
592	return 0;
593	}
594
595	#define dREQ \
596	aio_req req; \
597	\
598	if (SvOK (callback) && !SvROK (callback)) \
599	croak ("clalback must be undef or of reference type"); \
600	\
601	Newz (0, req, 1, aio_cb); \
602	if (!req) \
603	croak ("out of memory during aio_req allocation"); \
604	\
605	req->callback = newSVsv (callback);
606
607	MODULE = IO::AIO PACKAGE = IO::AIO
608
609	PROTOTYPES: ENABLE
610
611	BOOT:
612	{
613	create_pipe ();
614	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
615	}
616
617	void	550	void
618	min_parallel(nthreads)	551	max_poll_reqs (int nreqs)
619	int nthreads
620	PROTOTYPE: $	552	PROTOTYPE: $
		553	CODE:
		554	eio_set_max_poll_reqs (nreqs);
621		555
622	void	556	void
623	max_parallel(nthreads)	557	max_poll_time (double nseconds)
624	int nthreads
625	PROTOTYPE: $	558	PROTOTYPE: $
626
627	int
628	max_outstanding(nreqs)
629	int nreqs
630	PROTOTYPE: $
631	CODE:	559	CODE:
632	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:
633	max_outstanding = nreqs;	584	max_outstanding = maxreqs;
634		585
635	void	586	void
636	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	587	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
637	SV * pathname
638	int flags
639	int mode
640	SV * callback
641	PROTOTYPE: $$$;$	588	PROTOTYPE: $$$;$
642	CODE:	589	PPCODE:
643	{	590	{
644	dREQ;	591	dREQ;
645		592
646	req->type = REQ_OPEN;	593	req->type = EIO_OPEN;
647	req->data = newSVsv (pathname);	594	req->sv1 = newSVsv (pathname);
648	req->dataptr = SvPVbyte_nolen (req->data);	595	req->ptr1 = SvPVbyte_nolen (req->sv1);
649	req->fd = flags;	596	req->int1 = flags;
650	req->mode = mode;	597	req->int2 = mode;
651		598
652	send_req (req);	599	REQ_SEND;
653	}	600	}
654		601
655	void	602	void
656	aio_close(fh,callback=&PL_sv_undef)	603	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
657	SV * fh
658	SV * callback
659	PROTOTYPE: $;$	604	PROTOTYPE: $;$
660	ALIAS:	605	ALIAS:
661	aio_close = REQ_CLOSE
662	aio_fsync = REQ_FSYNC	606	aio_fsync = EIO_FSYNC
663	aio_fdatasync = REQ_FDATASYNC	607	aio_fdatasync = EIO_FDATASYNC
664	CODE:	608	PPCODE:
665	{	609	{
		610	int fd = extract_fd (fh, 0);
666	dREQ;	611	dREQ;
667		612
668	req->type = ix;	613	req->type = ix;
669	req->fh = newSVsv (fh);	614	req->sv1 = newSVsv (fh);
670	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	615	req->int1 = fd;
671		616
672	send_req (req);	617	REQ_SEND (req);
673	}	618	}
674		619
675	void	620	void
		621	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		622	PROTOTYPE: $$$$;$
		623	PPCODE:
		624	{
		625	int fd = extract_fd (fh, 0);
		626	dREQ;
		627
		628	req->type = EIO_SYNC_FILE_RANGE;
		629	req->sv1 = newSVsv (fh);
		630	req->int1 = fd;
		631	req->offs = SvVAL64 (offset);
		632	req->size = SvVAL64 (nbytes);
		633	req->int2 = flags;
		634
		635	REQ_SEND (req);
		636	}
		637
		638	void
		639	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		640	PROTOTYPE: $;$
		641	PPCODE:
		642	{
		643	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		644	int fd = extract_fd (fh, 0);
		645	dREQ;
		646
		647	if (close_pipe < 0)
		648	{
		649	int pipefd [2];
		650
		651	if (pipe (pipefd) < 0
		652	|| close (pipefd [1]) < 0
		653	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		654	abort (); /*D*/
		655
		656	close_pipe = pipefd [0];
		657	}
		658
		659	req->type = EIO_DUP2;
		660	req->int1 = close_pipe;
		661	req->sv2 = newSVsv (fh);
		662	req->int2 = fd;
		663
		664	REQ_SEND (req);
		665	}
		666
		667	void
676	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	668	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
677	SV * fh
678	UV offset
679	UV length
680	SV * data
681	UV dataoffset
682	SV * callback
683	ALIAS:	669	ALIAS:
684	aio_read = REQ_READ	670	aio_read = EIO_READ
685	aio_write = REQ_WRITE	671	aio_write = EIO_WRITE
686	PROTOTYPE: $$$$$;$	672	PROTOTYPE: $$$$$;$
687	CODE:	673	PPCODE:
688	{	674	{
689	aio_req req;
690	STRLEN svlen;	675	STRLEN svlen;
		676	int fd = extract_fd (fh, ix == EIO_WRITE);
691	char *svptr = SvPVbyte (data, svlen);	677	char *svptr = SvPVbyte (data, svlen);
692		678	UV len = SvUV (length);
693	SvUPGRADE (data, SVt_PV);
694	SvPOK_on (data);
695		679
696	if (dataoffset < 0)	680	if (dataoffset < 0)
697	dataoffset += svlen;	681	dataoffset += svlen;
698		682
699	if (dataoffset < 0 || dataoffset > svlen)	683	if (dataoffset < 0 || dataoffset > svlen)
700	croak ("data offset outside of string");	684	croak ("dataoffset outside of data scalar");
701		685
702	if (ix == REQ_WRITE)	686	if (ix == EIO_WRITE)
703	{	687	{
704	/* write: check length and adjust. */	688	/* write: check length and adjust. */
705	if (length < 0 || length + dataoffset > svlen)	689	if (!SvOK (length) || len + dataoffset > svlen)
706	length = svlen - dataoffset;	690	len = svlen - dataoffset;
707	}	691	}
708	else	692	else
709	{	693	{
710	/* read: grow scalar as necessary */	694	/* read: check type and grow scalar as necessary */
		695	SvUPGRADE (data, SVt_PV);
711	svptr = SvGROW (data, length + dataoffset);	696	svptr = SvGROW (data, len + dataoffset + 1);
712	}	697	}
713
714	if (length < 0)
715	croak ("length must not be negative");
716		698
717	{	699	{
718	dREQ;	700	dREQ;
719		701
720	req->type = ix;	702	req->type = ix;
721	req->fh = newSVsv (fh);	703	req->sv1 = newSVsv (fh);
722	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	704	req->int1 = fd;
723	: IoOFP (sv_2io (fh)));	705	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
724	req->offset = offset;	706	req->size = len;
725	req->length = length;
726	req->data = SvREFCNT_inc (data);	707	req->sv2 = SvREFCNT_inc (data);
727	req->dataptr = (char *)svptr + dataoffset;	708	req->ptr2 = (char *)svptr + dataoffset;
		709	req->stroffset = dataoffset;
728		710
729	if (!SvREADONLY (data))	711	if (!SvREADONLY (data))
730	{	712	{
731	SvREADONLY_on (data);	713	SvREADONLY_on (data);
732	req->data2ptr = (void *)data;	714	req->flags |= FLAG_SV2_RO_OFF;
733	}	715	}
734		716
735	send_req (req);	717	REQ_SEND;
736	}	718	}
737	}	719	}
738		720
739	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
740	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	737	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
741	SV * out_fh
742	SV * in_fh
743	UV in_offset
744	UV length
745	SV * callback
746	PROTOTYPE: $$$$;$	738	PROTOTYPE: $$$$;$
747	CODE:	739	PPCODE:
748	{	740	{
		741	int ifd = extract_fd (in_fh , 0);
		742	int ofd = extract_fd (out_fh, 0);
749	dREQ;	743	dREQ;
750		744
751	req->type = REQ_SENDFILE;	745	req->type = EIO_SENDFILE;
752	req->fh = newSVsv (out_fh);	746	req->sv1 = newSVsv (out_fh);
753	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	747	req->int1 = ofd;
754	req->fh2 = newSVsv (in_fh);	748	req->sv2 = newSVsv (in_fh);
755	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	749	req->int2 = ifd;
756	req->offset = in_offset;	750	req->offs = SvVAL64 (in_offset);
757	req->length = length;	751	req->size = length;
758		752
759	send_req (req);	753	REQ_SEND;
760	}	754	}
761		755
762	void	756	void
763	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	757	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
764	SV * fh
765	UV offset
766	IV length
767	SV * callback
768	PROTOTYPE: $$$;$	758	PROTOTYPE: $$$;$
769	CODE:	759	PPCODE:
770	{	760	{
		761	int fd = extract_fd (fh, 0);
771	dREQ;	762	dREQ;
772		763
773	req->type = REQ_READAHEAD;	764	req->type = EIO_READAHEAD;
774	req->fh = newSVsv (fh);	765	req->sv1 = newSVsv (fh);
775	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	766	req->int1 = fd;
776	req->offset = offset;	767	req->offs = SvVAL64 (offset);
777	req->length = length;	768	req->size = length;
778		769
779	send_req (req);	770	REQ_SEND;
780	}	771	}
781		772
782	void	773	void
783	aio_stat(fh_or_path,callback=&PL_sv_undef)	774	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
784	SV * fh_or_path
785	SV * callback
786	ALIAS:	775	ALIAS:
787	aio_stat = REQ_STAT	776	aio_stat = EIO_STAT
788	aio_lstat = REQ_LSTAT	777	aio_lstat = EIO_LSTAT
789	CODE:	778	PPCODE:
790	{	779	{
791	dREQ;	780	dREQ;
792		781
793	New (0, req->statdata, 1, Stat_t);	782	req->sv1 = newSVsv (fh_or_path);
794	if (!req->statdata)
795	{
796	free_req (req);
797	croak ("out of memory during aio_req->statdata allocation");
798	}
799		783
800	if (SvPOK (fh_or_path))	784	if (SvPOK (req->sv1))
801	{	785	{
802	req->type = ix;	786	req->type = ix;
803	req->data = newSVsv (fh_or_path);
804	req->dataptr = SvPVbyte_nolen (req->data);	787	req->ptr1 = SvPVbyte_nolen (req->sv1);
805	}	788	}
806	else	789	else
807	{	790	{
808	req->type = REQ_FSTAT;	791	req->type = EIO_FSTAT;
809	req->fh = newSVsv (fh_or_path);
810	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))
811	}	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	}
812		818
813	send_req (req);	819	REQ_SEND;
814	}	820	}
815		821
816	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
817	aio_unlink(pathname,callback=&PL_sv_undef)	896	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
818	SV * pathname
819	SV * callback
820	ALIAS:	897	ALIAS:
821	aio_unlink = REQ_UNLINK	898	aio_unlink = EIO_UNLINK
822	aio_rmdir = REQ_RMDIR	899	aio_rmdir = EIO_RMDIR
		900	aio_readdir = EIO_READDIR
823	CODE:	901	PPCODE:
824	{	902	{
825	dREQ;	903	dREQ;
826		904
827	req->type = ix;	905	req->type = ix;
828	req->data = newSVsv (pathname);	906	req->sv1 = newSVsv (pathname);
829	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;
830		921
831	send_req (req);	922	req->type = ix;
832	}	923	req->sv1 = newSVsv (oldpath);
833		924	req->ptr1 = SvPVbyte_nolen (req->sv1);
834	void	925	req->sv2 = newSVsv (newpath);
835	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	926	req->ptr2 = SvPVbyte_nolen (req->sv2);
836	SV * oldpath
837	SV * newpath
838	SV * callback
839	CODE:
840	{
841	dREQ;
842		927
843	req->type = REQ_SYMLINK;	928	REQ_SEND;
844	req->fh = newSVsv (oldpath);	929	}
845	req->data2ptr = SvPVbyte_nolen (req->fh);	930
846	req->data = newSVsv (newpath);	931	void
847	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;
848		936
849	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;
850	}	944	}
851		945
852	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
853	flush()	1008	flush ()
854	PROTOTYPE:	1009	PROTOTYPE:
855	CODE:	1010	CODE:
856	while (nreqs)	1011	while (eio_nreqs ())
857	{	1012	{
858	poll_wait ();	1013	poll_wait ();
859	poll_cb ();	1014	poll_cb ();
860	}	1015	}
861		1016
862	void	1017	int
863	poll()	1018	poll()
864	PROTOTYPE:	1019	PROTOTYPE:
865	CODE:	1020	CODE:
866	if (nreqs)
867	{
868	poll_wait ();	1021	poll_wait ();
869	poll_cb ();	1022	RETVAL = poll_cb ();
870	}	1023	OUTPUT:
		1024	RETVAL
871		1025
872	int	1026	int
873	poll_fileno()	1027	poll_fileno()
874	PROTOTYPE:	1028	PROTOTYPE:
875	CODE:	1029	CODE:
…		…
887		1041
888	void	1042	void
889	poll_wait()	1043	poll_wait()
890	PROTOTYPE:	1044	PROTOTYPE:
891	CODE:	1045	CODE:
892	if (nreqs)
893	poll_wait ();	1046	poll_wait ();
894		1047
895	int	1048	int
896	nreqs()	1049	nreqs()
897	PROTOTYPE:	1050	PROTOTYPE:
898	CODE:	1051	CODE:
899	RETVAL = nreqs;	1052	RETVAL = eio_nreqs ();
900	OUTPUT:	1053	OUTPUT:
901	RETVAL	1054	RETVAL
902		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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