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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.49 by root, Sun Oct 22 13:33:28 2006 UTC vs.
Revision 1.123 by root, Sat May 17 12:17:25 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>
11
12	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
13	#include <errno.h>	11	#include <errno.h>
14	#include <sys/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	12	#include <sys/types.h>
17	#include <sys/stat.h>	13	#include <sys/stat.h>
18	#include <limits.h>	14	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	15	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	16	#include <sched.h>
23		17
24	#if HAVE_SENDFILE	18	/* perl namespace pollution */
25	# if __linux	19	#undef VERSION
26	# include <sys/sendfile.h>	20
27	# elif __freebsd	21	#ifdef _WIN32
28	# include <sys/socket.h>	22
29	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
30	# elif __hpux	24	# undef malloc
31	# include <sys/socket.h>	25	# undef free
32	# elif __solaris /* not yet */	26
33	# include <sys/sendfile.h>	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
34	# else	59	#else
35	# error sendfile support requested but not available	60
36	# endif	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
37	#endif	68	#endif
38		69
39	/* used for struct dirent, AIX doesn't provide it */	70	#define EIO_STRUCT_STAT Stat_t
40	#ifndef NAME_MAX	71
41	# define NAME_MAX 4096	72	/* use NV for 32 bit perls as it allows larger offsets */
		73	#if IVSIZE >= 8
		74	# define SvVAL64 SvIV
		75	#else
		76	# define SvVAL64 SvNV
42	#endif	77	#endif
43		78
44	#if __ia64	79	static HV *stash;
45	# define STACKSIZE 65536	80	typedef SV SV8; /* byte-sv, used for argument-checking */
46	#else
47	# define STACKSIZE 8192
48	#endif
49
50	enum {
51	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,
61	REQ_GROUP,
62	};
63		81
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	82	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	83	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		84
67	typedef struct aio_cb	85	#define EIO_REQ_MEMBERS \
68	{
69	struct aio_cb *volatile next;
70
71	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72
73	SV *self; /* the perl counterpart of this request, if any */
74
75	SV *data, *callback;	86	SV *callback; \
76	SV *fh, *fh2;	87	SV *sv1, *sv2; \
77	void *dataptr, *data2ptr;
78	Stat_t *statdata;
79	off_t offset;
80	size_t length;
81	ssize_t result;
82
83	int type;
84	int fd, fd2;
85	int errorno;
86	STRLEN dataoffset;	88	STRLEN stroffset; \
87	mode_t mode; /* open */	89	SV *self;
88	unsigned char cancelled;
89	} aio_cb;
90		90
		91	#define EIO_NO_WRAPPERS 1
		92
		93	#include "libeio/eio.h"
		94
		95	static int req_invoke (eio_req *req);
		96	#define EIO_FINISH(req) req_invoke (req)
		97	static void aio_grp_feed (eio_req *grp);
		98	#define EIO_FEED(req) aio_grp_feed (req)
		99	static void req_destroy (eio_req *grp);
		100	#define EIO_DESTROY(req) req_destroy (req)
		101
		102	enum {
		103	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		104	};
		105
		106	#include "libeio/eio.c"
		107
91	typedef aio_cb *aio_req;	108	typedef eio_req *aio_req;
92	typedef aio_cb *aio_req_ornot;	109	typedef eio_req *aio_req_ornot;
93		110
94	static int started, wanted;	111	static SV *on_next_submit;
95	static volatile int nreqs;	112	static int next_pri = EIO_PRI_DEFAULT;
96	static int max_outstanding = 1<<30;	113	static int max_outstanding;
97	static int respipe [2];
98		114
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	115	static int respipe_osf [2], respipe [2] = { -1, -1 };
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		116
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	117	static void req_destroy (aio_req req);
104	static volatile aio_req ress, rese; /* queue start, queue end */
105
106	static void req_free (aio_req req);	118	static void req_cancel (aio_req req);
		119
		120	static void want_poll (void)
		121	{
		122	/* write a dummy byte to the pipe so fh becomes ready */
		123	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		124	}
		125
		126	static void done_poll (void)
		127	{
		128	/* read any signals sent by the worker threads */
		129	char buf [4];
		130	while (respipe_read (respipe [0], buf, 4) == 4)
		131	;
		132	}
107		133
108	/* must be called at most once */	134	/* must be called at most once */
109	static SV *req_sv (aio_req req, const char *klass)	135	static SV *req_sv (aio_req req, const char *klass)
110	{	136	{
111	if (!req->self)	137	if (!req->self)
…		…
117	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	143	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
118	}	144	}
119		145
120	static aio_req SvAIO_REQ (SV *sv)	146	static aio_req SvAIO_REQ (SV *sv)
121	{	147	{
		148	MAGIC *mg;
		149
122	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	150	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
123	croak ("object of class " AIO_REQ_KLASS " expected");	151	croak ("object of class " AIO_REQ_KLASS " expected");
124		152
125	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	153	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
126		154
127	return mg ? (aio_req)mg->mg_ptr : 0;	155	return mg ? (aio_req)mg->mg_ptr : 0;
128	}	156	}
129		157
130	static void aio_grp_feed (aio_req grp)	158	static void aio_grp_feed (aio_req grp)
131	{	159	{
132	while (grp->length < grp->fd2)	160	if (grp->sv2 && SvOK (grp->sv2))
133	{	161	{
134	int old_len = grp->length;	162	dSP;
135		163
136	if (grp->fh2 && SvOK (grp->fh2))	164	ENTER;
		165	SAVETMPS;
		166	PUSHMARK (SP);
		167	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		168	PUTBACK;
		169	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		170	SPAGAIN;
		171	FREETMPS;
		172	LEAVE;
		173	}
		174	}
		175
		176	static void req_submit (eio_req *req)
		177	{
		178	eio_submit (req);
		179
		180	if (on_next_submit)
		181	{
		182	dSP;
		183	SV *cb = sv_2mortal (on_next_submit);
		184
		185	on_next_submit = 0;
		186
		187	PUSHMARK (SP);
		188	PUTBACK;
		189	call_sv (cb, G_DISCARD | G_EVAL);
		190	}
		191	}
		192
		193	static int req_invoke (eio_req *req)
		194	{
		195	dSP;
		196
		197	if (req->flags & FLAG_SV2_RO_OFF)
		198	SvREADONLY_off (req->sv2);
		199
		200	if (!EIO_CANCELLED (req) && SvOK (req->callback))
		201	{
		202	ENTER;
		203	SAVETMPS;
		204	PUSHMARK (SP);
		205	EXTEND (SP, 1);
		206
		207	switch (req->type)
137	{	208	{
138	dSP;	209	case EIO_READDIR:
		210	{
		211	SV *rv = &PL_sv_undef;
139		212
140	ENTER;	213	if (req->result >= 0)
141	SAVETMPS;	214	{
142	PUSHMARK (SP);	215	int i;
143	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	216	char *buf = req->ptr2;
144	PUTBACK;	217	AV *av = newAV ();
145	call_sv (grp->fh2, G_VOID | G_EVAL);	218
146	SPAGAIN;	219	av_extend (av, req->result - 1);
147	FREETMPS;	220
148	LEAVE;	221	for (i = 0; i < req->result; ++i)
		222	{
		223	SV *sv = newSVpv (buf, 0);
		224
		225	av_store (av, i, sv);
		226	buf += SvCUR (sv) + 1;
		227	}
		228
		229	rv = sv_2mortal (newRV_noinc ((SV *)av));
		230	}
		231
		232	PUSHs (rv);
		233	}
		234	break;
		235
		236	case EIO_OPEN:
		237	{
		238	/* convert fd to fh */
		239	SV *fh = &PL_sv_undef;
		240
		241	if (req->result >= 0)
		242	{
		243	GV *gv = (GV *)sv_newmortal ();
		244	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		245	char sym [64];
		246	int symlen;
		247
		248	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		249	gv_init (gv, stash, sym, symlen, 0);
		250
		251	symlen = snprintf (
		252	sym,
		253	sizeof (sym),
		254	"%s&=%d",
		255	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		256	req->result
		257	);
		258
		259	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		260	fh = (SV *)gv;
		261	}
		262
		263	PUSHs (fh);
		264	}
		265	break;
		266
		267	case EIO_GROUP:
		268	req->int1 = 2; /* mark group as finished */
		269
		270	if (req->sv1)
		271	{
		272	int i;
		273	AV *av = (AV *)req->sv1;
		274
		275	EXTEND (SP, AvFILL (av) + 1);
		276	for (i = 0; i <= AvFILL (av); ++i)
		277	PUSHs (*av_fetch (av, i, 0));
		278	}
		279	break;
		280
		281	case EIO_NOP:
		282	case EIO_BUSY:
		283	break;
		284
		285	case EIO_READLINK:
		286	if (req->result > 0)
		287	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		288	break;
		289
		290	case EIO_STAT:
		291	case EIO_LSTAT:
		292	case EIO_FSTAT:
		293	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		294	PL_laststatval = req->result;
		295	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		296	PUSHs (sv_2mortal (newSViv (req->result)));
		297	break;
		298
		299	case EIO_READ:
		300	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		301	*SvEND (req->sv2) = 0;
		302	PUSHs (sv_2mortal (newSViv (req->result)));
		303	break;
		304
		305	case EIO_DUP2:
		306	if (req->result > 0)
		307	req->result = 0;
		308	/* FALLTHROUGH */
		309
		310	default:
		311	PUSHs (sv_2mortal (newSViv (req->result)));
		312	break;
149	}	313	}
150		314
151	/* stop if no progress has been made */	315	errno = req->errorno;
152	if (old_len == grp->length)	316
153	{	317	PUTBACK;
154	SvREFCNT_dec (grp->fh2);	318	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
155	grp->fh2 = 0;	319	SPAGAIN;
156	break;	320
157	}	321	FREETMPS;
		322	LEAVE;
		323
		324	PUTBACK;
158	}	325	}
159	}
160		326
161	static void poll_wait ()	327	return !!SvTRUE (ERRSV);
162	{
163	if (nreqs && !ress)
164	{
165	fd_set rfd;
166	FD_ZERO(&rfd);
167	FD_SET(respipe [0], &rfd);
168
169	select (respipe [0] + 1, &rfd, 0, 0, 0);
170	}
171	}	328	}
172		329
173	static void req_invoke (aio_req req)
174	{
175	dSP;
176	int errorno = errno;
177
178	if (req->cancelled || !SvOK (req->callback))
179	return;
180
181	errno = req->errorno;
182
183	ENTER;
184	SAVETMPS;
185	PUSHMARK (SP);
186	EXTEND (SP, 1);
187
188	switch (req->type)
189	{
190	case REQ_READDIR:
191	{
192	SV *rv = &PL_sv_undef;
193
194	if (req->result >= 0)
195	{
196	char *buf = req->data2ptr;
197	AV *av = newAV ();
198
199	while (req->result)
200	{
201	SV *sv = newSVpv (buf, 0);
202
203	av_push (av, sv);
204	buf += SvCUR (sv) + 1;
205	req->result--;
206	}
207
208	rv = sv_2mortal (newRV_noinc ((SV *)av));
209	}
210
211	PUSHs (rv);
212	}
213	break;
214
215	case REQ_OPEN:
216	{
217	/* convert fd to fh */
218	SV *fh;
219
220	PUSHs (sv_2mortal (newSViv (req->result)));
221	PUTBACK;
222	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
223	SPAGAIN;
224
225	fh = SvREFCNT_inc (POPs);
226
227	PUSHMARK (SP);
228	XPUSHs (sv_2mortal (fh));
229	}
230	break;
231
232	case REQ_GROUP:
233	req->fd = 2; /* mark group as finished */
234
235	if (req->data)
236	{
237	int i;
238	AV *av = (AV *)req->data;
239
240	EXTEND (SP, AvFILL (av) + 1);
241	for (i = 0; i <= AvFILL (av); ++i)
242	PUSHs (*av_fetch (av, i, 0));
243	}
244	break;
245
246	case REQ_SLEEP:
247	break;
248
249	default:
250	PUSHs (sv_2mortal (newSViv (req->result)));
251	break;
252	}
253
254
255	PUTBACK;
256	call_sv (req->callback, G_VOID | G_EVAL);
257	SPAGAIN;
258
259	if (SvTRUE (ERRSV))
260	{
261	req_free (req);
262	croak (0);
263	}
264
265	FREETMPS;
266	LEAVE;
267
268	errno = errorno;
269	}
270
271	static void req_free (aio_req req)	330	static void req_destroy (aio_req req)
272	{	331	{
273	if (req->grp)
274	{
275	aio_req grp = req->grp;
276
277	/* unlink request */
278	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
279	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
280
281	if (grp->grp_first == req)
282	grp->grp_first = req->grp_next;
283
284	--grp->length;
285
286	/* call feeder, if applicable */
287	aio_grp_feed (grp);
288
289	/* finish, if done */
290	if (!grp->length && grp->fd)
291	{
292	req_invoke (grp);
293	req_free (grp);
294	}
295	}
296
297	if (req->self)	332	if (req->self)
298	{	333	{
299	sv_unmagic (req->self, PERL_MAGIC_ext);	334	sv_unmagic (req->self, PERL_MAGIC_ext);
300	SvREFCNT_dec (req->self);	335	SvREFCNT_dec (req->self);
301	}	336	}
302		337
303	SvREFCNT_dec (req->data);
304	SvREFCNT_dec (req->fh);	338	SvREFCNT_dec (req->sv1);
305	SvREFCNT_dec (req->fh2);	339	SvREFCNT_dec (req->sv2);
306	SvREFCNT_dec (req->callback);	340	SvREFCNT_dec (req->callback);
307	Safefree (req->statdata);
308
309	if (req->type == REQ_READDIR && req->result >= 0)
310	free (req->data2ptr);
311		341
312	Safefree (req);	342	Safefree (req);
313	}	343	}
314		344
315	static void req_cancel (aio_req req)	345	static void req_cancel_subs (aio_req grp)
316	{	346	{
317	req->cancelled = 1;	347	aio_req sub;
318		348
319	if (req->type == REQ_GROUP)	349	if (grp->type != EIO_GROUP)
		350	return;
		351
		352	SvREFCNT_dec (grp->sv2);
		353	grp->sv2 = 0;
		354
		355	eio_grp_cancel (grp);
		356	}
		357
		358	#ifdef USE_SOCKETS_AS_HANDLES
		359	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		360	#else
		361	# define TO_SOCKET(x) (x)
		362	#endif
		363
		364	static void
		365	create_respipe (void)
		366	{
		367	int old_readfd = respipe [0];
		368
		369	if (respipe [1] >= 0)
		370	respipe_close (TO_SOCKET (respipe [1]));
		371
		372	#ifdef _WIN32
		373	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		374	#else
		375	if (pipe (respipe))
		376	#endif
		377	croak ("unable to initialize result pipe");
		378
		379	if (old_readfd >= 0)
320	{	380	{
321	aio_req sub;	381	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		382	croak ("unable to initialize result pipe(2)");
322		383
323	for (sub = req->grp_first; sub; sub = sub->grp_next)	384	respipe_close (respipe [0]);
324	req_cancel (sub);	385	respipe [0] = old_readfd;
325	}	386	}
326	}
327		387
328	static int poll_cb ()	388	#ifdef _WIN32
329	{	389	int arg = 1;
330	dSP;	390	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
331	int count = 0;	391	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
332	int do_croak = 0;	392	#else
333	aio_req req;	393	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		394	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		395	#endif
		396	croak ("unable to initialize result pipe(3)");
334		397
335	for (;;)	398	respipe_osf [0] = TO_SOCKET (respipe [0]);
		399	respipe_osf [1] = TO_SOCKET (respipe [1]);
		400	}
		401
		402	static void poll_wait (void)
		403	{
		404	fd_set rfd;
		405
		406	while (eio_nreqs ())
336	{	407	{
337	pthread_mutex_lock (&reslock);	408	int size;
338	req = ress;
339		409
		410	X_LOCK (reslock);
		411	size = res_queue.size;
		412	X_UNLOCK (reslock);
		413
340	if (req)	414	if (size)
341	{
342	ress = req->next;
343
344	if (!ress)
345	{
346	/* read any signals sent by the worker threads */
347	char buf [32];
348	while (read (respipe [0], buf, 32) == 32)
349	;
350
351	rese = 0;
352	}
353	}
354
355	pthread_mutex_unlock (&reslock);
356
357	if (!req)
358	break;	415	return;
359		416
360	nreqs--;	417	etp_maybe_start_thread ();
361		418
362	if (req->type == REQ_QUIT)	419	FD_ZERO (&rfd);
363	started--;	420	FD_SET (respipe [0], &rfd);
364	else if (req->type == REQ_GROUP && req->length)
365	{
366	req->fd = 1; /* mark request as delayed */
367	continue;
368	}
369	else
370	{
371	if (req->type == REQ_READ)
372	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
373		421
374	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))	422	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
375	SvREADONLY_off (req->data);
376
377	if (req->statdata)
378	{
379	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
380	PL_laststatval = req->result;
381	PL_statcache = *(req->statdata);
382	}
383
384	req_invoke (req);
385
386	count++;
387	}
388
389	req_free (req);
390	}	423	}
391
392	return count;
393	}	424	}
394		425
395	static void *aio_proc(void *arg);	426	static int poll_cb (void)
396
397	static void start_thread (void)
398	{	427	{
399	sigset_t fullsigset, oldsigset;	428	int res;
400	pthread_t tid;
401	pthread_attr_t attr;
402		429
403	pthread_attr_init (&attr);	430	do
404	pthread_attr_setstacksize (&attr, STACKSIZE);
405	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
406
407	sigfillset (&fullsigset);
408	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
409
410	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
411	started++;
412
413	sigprocmask (SIG_SETMASK, &oldsigset, 0);
414	}
415
416	static void req_send (aio_req req)
417	{
418	while (started < wanted && nreqs >= started)
419	start_thread ();
420
421	nreqs++;
422
423	pthread_mutex_lock (&reqlock);
424
425	req->next = 0;
426
427	if (reqe)
428	{	431	{
429	reqe->next = req;	432	res = eio_poll ();
430	reqe = req;	433
		434	if (res > 0)
		435	croak (0);
431	}	436	}
432	else	437	while (max_outstanding && max_outstanding <= eio_nreqs ());
433	reqe = reqs = req;
434
435	pthread_cond_signal (&reqwait);
436	pthread_mutex_unlock (&reqlock);
437
438	if (nreqs > max_outstanding)
439	for (;;)
440	{
441	poll_cb ();
442
443	if (nreqs <= max_outstanding)
444	break;
445
446	poll_wait ();
447	}
448	}
449
450	static void end_thread (void)
451	{
452	aio_req req;
453	Newz (0, req, 1, aio_cb);
454	req->type = REQ_QUIT;
455
456	req_send (req);
457	}
458
459	static void min_parallel (int nthreads)
460	{
461	if (wanted < nthreads)
462	wanted = nthreads;
463	}
464
465	static void max_parallel (int nthreads)
466	{
467	int cur = started;
468
469	if (wanted > nthreads)
470	wanted = nthreads;
471
472	while (cur > wanted)
473	{
474	end_thread ();
475	cur--;
476	}
477
478	while (started > wanted)
479	{
480	poll_wait ();
481	poll_cb ();
482	}
483	}
484
485	static void create_pipe ()
486	{
487	if (pipe (respipe))
488	croak ("unable to initialize result pipe");
489
490	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
491	croak ("cannot set result pipe to nonblocking mode");
492
493	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
494	croak ("cannot set result pipe to nonblocking mode");
495	}
496
497	/*****************************************************************************/
498	/* work around various missing functions */
499
500	#if !HAVE_PREADWRITE
501	# define pread aio_pread
502	# define pwrite aio_pwrite
503
504	/*
505	* make our pread/pwrite safe against themselves, but not against
506	* normal read/write by using a mutex. slows down execution a lot,
507	* but that's your problem, not mine.
508	*/
509	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
510
511	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
512	{
513	ssize_t res;
514	off_t ooffset;
515
516	pthread_mutex_lock (&preadwritelock);
517	ooffset = lseek (fd, 0, SEEK_CUR);
518	lseek (fd, offset, SEEK_SET);
519	res = read (fd, buf, count);
520	lseek (fd, ooffset, SEEK_SET);
521	pthread_mutex_unlock (&preadwritelock);
522		438
523	return res;	439	return res;
524	}	440	}
525		441
526	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
527	{
528	ssize_t res;
529	off_t ooffset;
530
531	pthread_mutex_lock (&preadwritelock);
532	ooffset = lseek (fd, 0, SEEK_CUR);
533	lseek (fd, offset, SEEK_SET);
534	res = write (fd, buf, count);
535	lseek (fd, offset, SEEK_SET);
536	pthread_mutex_unlock (&preadwritelock);
537
538	return res;
539	}
540	#endif
541
542	#if !HAVE_FDATASYNC
543	# define fdatasync fsync
544	#endif
545
546	#if !HAVE_READAHEAD
547	# define readahead aio_readahead
548
549	static ssize_t readahead (int fd, off_t offset, size_t count)
550	{
551	char readahead_buf[4096];
552
553	while (count > 0)
554	{
555	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
556
557	pread (fd, readahead_buf, len, offset);
558	offset += len;
559	count -= len;
560	}
561
562	errno = 0;
563	}
564	#endif
565
566	#if !HAVE_READDIR_R
567	# define readdir_r aio_readdir_r
568
569	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
570
571	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
572	{
573	struct dirent *e;
574	int errorno;
575
576	pthread_mutex_lock (&readdirlock);
577
578	e = readdir (dirp);
579	errorno = errno;
580
581	if (e)
582	{
583	*res = ent;
584	strcpy (ent->d_name, e->d_name);
585	}
586	else
587	*res = 0;
588
589	pthread_mutex_unlock (&readdirlock);
590
591	errno = errorno;
592	return e ? 0 : -1;
593	}
594	#endif
595
596	/* sendfile always needs emulation */
597	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
598	{
599	ssize_t res;
600
601	if (!count)
602	return 0;
603
604	#if HAVE_SENDFILE
605	# if __linux
606	res = sendfile (ofd, ifd, &offset, count);
607
608	# elif __freebsd
609	/*
610	* Of course, the freebsd sendfile is a dire hack with no thoughts
611	* wasted on making it similar to other I/O functions.
612	*/
613	{
614	off_t sbytes;
615	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
616
617	if (res < 0 && sbytes)
618	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
619	res = sbytes;
620	}
621
622	# elif __hpux
623	res = sendfile (ofd, ifd, offset, count, 0, 0);
624
625	# elif __solaris
626	{
627	struct sendfilevec vec;
628	size_t sbytes;
629
630	vec.sfv_fd = ifd;
631	vec.sfv_flag = 0;
632	vec.sfv_off = offset;
633	vec.sfv_len = count;
634
635	res = sendfilev (ofd, &vec, 1, &sbytes);
636
637	if (res < 0 && sbytes)
638	res = sbytes;
639	}
640
641	# endif
642	#else
643	res = -1;
644	errno = ENOSYS;
645	#endif
646
647	if (res < 0
648	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
649	#if __solaris
650	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
651	#endif
652	)
653	)
654	{
655	/* emulate sendfile. this is a major pain in the ass */
656	char buf[4096];
657	res = 0;
658
659	while (count)
660	{
661	ssize_t cnt;
662
663	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
664
665	if (cnt <= 0)
666	{
667	if (cnt && !res) res = -1;
668	break;
669	}
670
671	cnt = write (ofd, buf, cnt);
672
673	if (cnt <= 0)
674	{
675	if (cnt && !res) res = -1;
676	break;
677	}
678
679	offset += cnt;
680	res += cnt;
681	count -= cnt;
682	}
683	}
684
685	return res;
686	}
687
688	/* read a full directory */
689	static int scandir_ (const char *path, void **namesp)
690	{
691	DIR *dirp = opendir (path);
692	union
693	{
694	struct dirent d;
695	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
696	} u;
697	struct dirent *entp;
698	char *name, *names;
699	int memlen = 4096;
700	int memofs = 0;
701	int res = 0;
702	int errorno;
703
704	if (!dirp)
705	return -1;
706
707	names = malloc (memlen);
708
709	for (;;)
710	{
711	errno = 0, readdir_r (dirp, &u.d, &entp);
712
713	if (!entp)
714	break;
715
716	name = entp->d_name;
717
718	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
719	{
720	int len = strlen (name) + 1;
721
722	res++;
723
724	while (memofs + len > memlen)
725	{
726	memlen *= 2;
727	names = realloc (names, memlen);
728	if (!names)
729	break;
730	}
731
732	memcpy (names + memofs, name, len);
733	memofs += len;
734	}
735	}
736
737	errorno = errno;
738	closedir (dirp);
739
740	if (errorno)
741	{
742	free (names);
743	errno = errorno;
744	res = -1;
745	}
746
747	*namesp = (void *)names;
748	return res;
749	}
750
751	/*****************************************************************************/
752
753	static void *aio_proc (void *thr_arg)
754	{
755	aio_req req;
756	int type;
757
758	do
759	{
760	pthread_mutex_lock (&reqlock);
761
762	for (;;)
763	{
764	req = reqs;
765
766	if (reqs)
767	{
768	reqs = reqs->next;
769	if (!reqs) reqe = 0;
770	}
771
772	if (req)
773	break;
774
775	pthread_cond_wait (&reqwait, &reqlock);
776	}
777
778	pthread_mutex_unlock (&reqlock);
779
780	errno = 0; /* strictly unnecessary */
781
782	if (!req->cancelled)
783	switch (req->type)
784	{
785	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
786	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
787
788	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
789	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
790
791	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
792	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
793	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
794
795	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
796	case REQ_CLOSE: req->result = close (req->fd); break;
797	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
798	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
799	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
800	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
801	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
802
803	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
804	case REQ_FSYNC: req->result = fsync (req->fd); break;
805	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
806
807	case REQ_SLEEP:
808	{
809	struct timeval tv;
810
811	tv.tv_sec = req->fd;
812	tv.tv_usec = req->fd2;
813
814	req->result = select (0, 0, 0, 0, &tv);
815	}
816
817	case REQ_QUIT:
818	break;
819
820	default:
821	req->result = ENOSYS;
822	break;
823	}
824
825	req->errorno = errno;
826
827	pthread_mutex_lock (&reslock);
828
829	req->next = 0;
830
831	if (rese)
832	{
833	rese->next = req;
834	rese = req;
835	}
836	else
837	{
838	rese = ress = req;
839
840	/* write a dummy byte to the pipe so fh becomes ready */
841	write (respipe [1], &respipe, 1);
842	}
843
844	pthread_mutex_unlock (&reslock);
845	}
846	while (type != REQ_QUIT);
847
848	return 0;
849	}
850
851	/*****************************************************************************/
852
853	static void atfork_prepare (void)
854	{
855	pthread_mutex_lock (&reqlock);
856	pthread_mutex_lock (&reslock);
857	#if !HAVE_PREADWRITE
858	pthread_mutex_lock (&preadwritelock);
859	#endif
860	#if !HAVE_READDIR_R
861	pthread_mutex_lock (&readdirlock);
862	#endif
863	}
864
865	static void atfork_parent (void)
866	{
867	#if !HAVE_READDIR_R
868	pthread_mutex_unlock (&readdirlock);
869	#endif
870	#if !HAVE_PREADWRITE
871	pthread_mutex_unlock (&preadwritelock);
872	#endif
873	pthread_mutex_unlock (&reslock);
874	pthread_mutex_unlock (&reqlock);
875	}
876
877	static void atfork_child (void)	442	static void atfork_child (void)
878	{	443	{
879	aio_req prv;
880
881	started = 0;
882
883	while (reqs)
884	{
885	prv = reqs;
886	reqs = prv->next;
887	req_free (prv);
888	}
889
890	reqs = reqe = 0;
891
892	while (ress)
893	{
894	prv = ress;
895	ress = prv->next;
896	req_free (prv);
897	}
898
899	ress = rese = 0;
900
901	close (respipe [0]);
902	close (respipe [1]);
903	create_pipe ();	444	create_respipe ();
904
905	atfork_parent ();
906	}	445	}
907		446
908	#define dREQ \	447	#define dREQ \
909	aio_req req; \	448	aio_req req; \
		449	int req_pri = next_pri; \
		450	next_pri = EIO_PRI_DEFAULT; \
910	\	451	\
911	if (SvOK (callback) && !SvROK (callback)) \	452	if (SvOK (callback) && !SvROK (callback)) \
912	croak ("callback must be undef or of reference type"); \	453	croak ("callback must be undef or of reference type"); \
913	\	454	\
914	Newz (0, req, 1, aio_cb); \	455	Newz (0, req, 1, eio_req); \
915	if (!req) \	456	if (!req) \
916	croak ("out of memory during aio_req allocation"); \	457	croak ("out of memory during eio_req allocation"); \
917	\	458	\
918	req->callback = newSVsv (callback)	459	req->callback = newSVsv (callback); \
		460	req->pri = req_pri
919		461
920	#define REQ_SEND \	462	#define REQ_SEND \
921	req_send (req); \	463	req_submit (req); \
922	\	464	\
923	if (GIMME_V != G_VOID) \	465	if (GIMME_V != G_VOID) \
924	XPUSHs (req_sv (req, AIO_REQ_KLASS));	466	XPUSHs (req_sv (req, AIO_REQ_KLASS));
925		467
926	MODULE = IO::AIO PACKAGE = IO::AIO	468	MODULE = IO::AIO PACKAGE = IO::AIO
927		469
928	PROTOTYPES: ENABLE	470	PROTOTYPES: ENABLE
929		471
930	BOOT:	472	BOOT:
931	{	473	{
932	HV *stash = gv_stashpv ("IO::AIO", 1);	474	stash = gv_stashpv ("IO::AIO", 1);
		475
933	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	476	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
934	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	477	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
935	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	478	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		479	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		480	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		481	#ifndef _WIN32
		482	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		483	#endif
936		484
937	create_pipe ();	485	create_respipe ();
938	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
939	}
940		486
		487	if (eio_init (want_poll, done_poll) < 0)
		488	croak ("IO::AIO: unable to initialise eio library");
		489
		490	/* atfork child called in fifo order, so before eio's handler */
		491	X_THREAD_ATFORK (0, 0, atfork_child);
		492	}
		493
941	void	494	void
942	min_parallel (nthreads)	495	max_poll_reqs (int nreqs)
943	int nthreads
944	PROTOTYPE: $	496	PROTOTYPE: $
		497	CODE:
		498	eio_set_max_poll_reqs (nreqs);
945		499
946	void	500	void
947	max_parallel (nthreads)	501	max_poll_time (double nseconds)
948	int nthreads
949	PROTOTYPE: $	502	PROTOTYPE: $
950
951	int
952	max_outstanding (nreqs)
953	int nreqs
954	PROTOTYPE: $
955	CODE:	503	CODE:
956	RETVAL = max_outstanding;	504	eio_set_max_poll_time (nseconds);
		505
		506	void
		507	min_parallel (int nthreads)
		508	PROTOTYPE: $
		509	CODE:
		510	eio_set_min_parallel (nthreads);
		511
		512	void
		513	max_parallel (int nthreads)
		514	PROTOTYPE: $
		515	CODE:
		516	eio_set_max_parallel (nthreads);
		517
		518	void
		519	max_idle (int nthreads)
		520	PROTOTYPE: $
		521	CODE:
		522	eio_set_max_idle (nthreads);
		523
		524	void
		525	max_outstanding (int maxreqs)
		526	PROTOTYPE: $
		527	CODE:
957	max_outstanding = nreqs;	528	max_outstanding = maxreqs;
958		529
959	void	530	void
960	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	531	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
961	SV * pathname
962	int flags
963	int mode
964	SV * callback
965	PROTOTYPE: $$$;$	532	PROTOTYPE: $$$;$
966	PPCODE:	533	PPCODE:
967	{	534	{
968	dREQ;	535	dREQ;
969		536
970	req->type = REQ_OPEN;	537	req->type = EIO_OPEN;
971	req->data = newSVsv (pathname);	538	req->sv1 = newSVsv (pathname);
972	req->dataptr = SvPVbyte_nolen (req->data);	539	req->ptr1 = SvPVbyte_nolen (req->sv1);
973	req->fd = flags;	540	req->int1 = flags;
974	req->mode = mode;	541	req->int2 = mode;
975		542
976	REQ_SEND;	543	REQ_SEND;
977	}	544	}
978		545
979	void	546	void
980	aio_close (fh,callback=&PL_sv_undef)	547	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
981	SV * fh
982	SV * callback
983	PROTOTYPE: $;$	548	PROTOTYPE: $;$
984	ALIAS:	549	ALIAS:
985	aio_close = REQ_CLOSE
986	aio_fsync = REQ_FSYNC	550	aio_fsync = EIO_FSYNC
987	aio_fdatasync = REQ_FDATASYNC	551	aio_fdatasync = EIO_FDATASYNC
988	PPCODE:	552	PPCODE:
989	{	553	{
990	dREQ;	554	dREQ;
991		555
992	req->type = ix;	556	req->type = ix;
993	req->fh = newSVsv (fh);	557	req->sv1 = newSVsv (fh);
994	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	558	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
995		559
996	REQ_SEND (req);	560	REQ_SEND (req);
997	}	561	}
998		562
999	void	563	void
		564	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		565	PROTOTYPE: $;$
		566	PPCODE:
		567	{
		568	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		569	dREQ;
		570
		571	if (close_pipe < 0)
		572	{
		573	int pipefd [2];
		574
		575	if (pipe (pipefd) < 0
		576	|| close (pipefd [1]) < 0
		577	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		578	abort (); /*D*/
		579
		580	close_pipe = pipefd [0];
		581	}
		582
		583	req->type = EIO_DUP2;
		584	req->int1 = close_pipe;
		585	req->sv2 = newSVsv (fh);
		586	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		587
		588	REQ_SEND (req);
		589	}
		590
		591	void
1000	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	592	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1001	SV * fh
1002	UV offset
1003	UV length
1004	SV * data
1005	UV dataoffset
1006	SV * callback
1007	ALIAS:	593	ALIAS:
1008	aio_read = REQ_READ	594	aio_read = EIO_READ
1009	aio_write = REQ_WRITE	595	aio_write = EIO_WRITE
1010	PROTOTYPE: $$$$$;$	596	PROTOTYPE: $$$$$;$
1011	PPCODE:	597	PPCODE:
1012	{	598	{
1013	aio_req req;
1014	STRLEN svlen;	599	STRLEN svlen;
1015	char *svptr = SvPVbyte (data, svlen);	600	char *svptr = SvPVbyte (data, svlen);
		601	UV len = SvUV (length);
1016		602
1017	SvUPGRADE (data, SVt_PV);	603	SvUPGRADE (data, SVt_PV);
1018	SvPOK_on (data);	604	SvPOK_on (data);
1019		605
1020	if (dataoffset < 0)	606	if (dataoffset < 0)
1021	dataoffset += svlen;	607	dataoffset += svlen;
1022		608
1023	if (dataoffset < 0 || dataoffset > svlen)	609	if (dataoffset < 0 || dataoffset > svlen)
1024	croak ("data offset outside of string");	610	croak ("dataoffset outside of data scalar");
1025		611
1026	if (ix == REQ_WRITE)	612	if (ix == EIO_WRITE)
1027	{	613	{
1028	/* write: check length and adjust. */	614	/* write: check length and adjust. */
1029	if (length < 0 || length + dataoffset > svlen)	615	if (!SvOK (length) || len + dataoffset > svlen)
1030	length = svlen - dataoffset;	616	len = svlen - dataoffset;
1031	}	617	}
1032	else	618	else
1033	{	619	{
1034	/* read: grow scalar as necessary */	620	/* read: grow scalar as necessary */
1035	svptr = SvGROW (data, length + dataoffset);	621	svptr = SvGROW (data, len + dataoffset + 1);
1036	}	622	}
1037		623
1038	if (length < 0)	624	if (len < 0)
1039	croak ("length must not be negative");	625	croak ("length must not be negative");
1040		626
1041	{	627	{
1042	dREQ;	628	dREQ;
1043		629
1044	req->type = ix;	630	req->type = ix;
1045	req->fh = newSVsv (fh);	631	req->sv1 = newSVsv (fh);
1046	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	632	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1047	: IoOFP (sv_2io (fh)));	633	: IoOFP (sv_2io (fh)));
		634	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1048	req->offset = offset;	635	req->size = len;
1049	req->length = length;
1050	req->data = SvREFCNT_inc (data);	636	req->sv2 = SvREFCNT_inc (data);
1051	req->dataptr = (char *)svptr + dataoffset;	637	req->ptr2 = (char *)svptr + dataoffset;
		638	req->stroffset = dataoffset;
1052		639
1053	if (!SvREADONLY (data))	640	if (!SvREADONLY (data))
1054	{	641	{
1055	SvREADONLY_on (data);	642	SvREADONLY_on (data);
1056	req->data2ptr = (void *)data;	643	req->flags |= FLAG_SV2_RO_OFF;
1057	}	644	}
1058		645
1059	REQ_SEND;	646	REQ_SEND;
1060	}	647	}
1061	}	648	}
1062		649
1063	void	650	void
		651	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		652	PROTOTYPE: $$;$
		653	PPCODE:
		654	{
		655	SV *data;
		656	dREQ;
		657
		658	req->type = EIO_READLINK;
		659	req->sv1 = newSVsv (path);
		660	req->ptr1 = SvPVbyte_nolen (req->sv1);
		661
		662	REQ_SEND;
		663	}
		664
		665	void
1064	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	666	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1065	SV * out_fh
1066	SV * in_fh
1067	UV in_offset
1068	UV length
1069	SV * callback
1070	PROTOTYPE: $$$$;$	667	PROTOTYPE: $$$$;$
1071	PPCODE:	668	PPCODE:
1072	{	669	{
1073	dREQ;	670	dREQ;
1074		671
1075	req->type = REQ_SENDFILE;	672	req->type = EIO_SENDFILE;
1076	req->fh = newSVsv (out_fh);	673	req->sv1 = newSVsv (out_fh);
1077	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	674	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1078	req->fh2 = newSVsv (in_fh);	675	req->sv2 = newSVsv (in_fh);
1079	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	676	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1080	req->offset = in_offset;	677	req->offs = SvVAL64 (in_offset);
1081	req->length = length;	678	req->size = length;
1082		679
1083	REQ_SEND;	680	REQ_SEND;
1084	}	681	}
1085		682
1086	void	683	void
1087	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	684	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1088	SV * fh
1089	UV offset
1090	IV length
1091	SV * callback
1092	PROTOTYPE: $$$;$	685	PROTOTYPE: $$$;$
1093	PPCODE:	686	PPCODE:
1094	{	687	{
1095	dREQ;	688	dREQ;
1096		689
1097	req->type = REQ_READAHEAD;	690	req->type = EIO_READAHEAD;
1098	req->fh = newSVsv (fh);	691	req->sv1 = newSVsv (fh);
1099	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	692	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1100	req->offset = offset;	693	req->offs = SvVAL64 (offset);
1101	req->length = length;	694	req->size = length;
1102		695
1103	REQ_SEND;	696	REQ_SEND;
1104	}	697	}
1105		698
1106	void	699	void
1107	aio_stat (fh_or_path,callback=&PL_sv_undef)	700	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1108	SV * fh_or_path
1109	SV * callback
1110	ALIAS:	701	ALIAS:
1111	aio_stat = REQ_STAT	702	aio_stat = EIO_STAT
1112	aio_lstat = REQ_LSTAT	703	aio_lstat = EIO_LSTAT
1113	PPCODE:	704	PPCODE:
1114	{	705	{
1115	dREQ;	706	dREQ;
1116		707
1117	New (0, req->statdata, 1, Stat_t);	708	req->sv1 = newSVsv (fh_or_path);
1118	if (!req->statdata)
1119	{
1120	req_free (req);
1121	croak ("out of memory during aio_req->statdata allocation");
1122	}
1123		709
1124	if (SvPOK (fh_or_path))	710	if (SvPOK (req->sv1))
1125	{	711	{
1126	req->type = ix;	712	req->type = ix;
1127	req->data = newSVsv (fh_or_path);
1128	req->dataptr = SvPVbyte_nolen (req->data);	713	req->ptr1 = SvPVbyte_nolen (req->sv1);
1129	}	714	}
1130	else	715	else
1131	{	716	{
1132	req->type = REQ_FSTAT;	717	req->type = EIO_FSTAT;
1133	req->fh = newSVsv (fh_or_path);
1134	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	718	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1135	}	719	}
1136		720
1137	REQ_SEND;	721	REQ_SEND;
1138	}	722	}
1139		723
1140	void	724	void
		725	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		726	PPCODE:
		727	{
		728	dREQ;
		729
		730	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		731	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		732	req->sv1 = newSVsv (fh_or_path);
		733
		734	if (SvPOK (req->sv1))
		735	{
		736	req->type = EIO_UTIME;
		737	req->ptr1 = SvPVbyte_nolen (req->sv1);
		738	}
		739	else
		740	{
		741	req->type = EIO_FUTIME;
		742	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		743	}
		744
		745	REQ_SEND;
		746	}
		747
		748	void
		749	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		750	PPCODE:
		751	{
		752	dREQ;
		753
		754	req->sv1 = newSVsv (fh_or_path);
		755	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		756
		757	if (SvPOK (req->sv1))
		758	{
		759	req->type = EIO_TRUNCATE;
		760	req->ptr1 = SvPVbyte_nolen (req->sv1);
		761	}
		762	else
		763	{
		764	req->type = EIO_FTRUNCATE;
		765	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		766	}
		767
		768	REQ_SEND;
		769	}
		770
		771	void
		772	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		773	ALIAS:
		774	aio_chmod = EIO_CHMOD
		775	aio_mkdir = EIO_MKDIR
		776	PPCODE:
		777	{
		778	dREQ;
		779
		780	req->int2 = mode;
		781	req->sv1 = newSVsv (fh_or_path);
		782
		783	if (SvPOK (req->sv1))
		784	{
		785	req->type = ix;
		786	req->ptr1 = SvPVbyte_nolen (req->sv1);
		787	}
		788	else
		789	{
		790	req->type = EIO_FCHMOD;
		791	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		792	}
		793
		794	REQ_SEND;
		795	}
		796
		797	void
		798	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		799	PPCODE:
		800	{
		801	dREQ;
		802
		803	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		804	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		805	req->sv1 = newSVsv (fh_or_path);
		806
		807	if (SvPOK (req->sv1))
		808	{
		809	req->type = EIO_CHOWN;
		810	req->ptr1 = SvPVbyte_nolen (req->sv1);
		811	}
		812	else
		813	{
		814	req->type = EIO_FCHOWN;
		815	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		816	}
		817
		818	REQ_SEND;
		819	}
		820
		821	void
1141	aio_unlink (pathname,callback=&PL_sv_undef)	822	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1142	SV * pathname
1143	SV * callback
1144	ALIAS:	823	ALIAS:
1145	aio_unlink = REQ_UNLINK	824	aio_unlink = EIO_UNLINK
1146	aio_rmdir = REQ_RMDIR	825	aio_rmdir = EIO_RMDIR
1147	aio_readdir = REQ_READDIR	826	aio_readdir = EIO_READDIR
1148	PPCODE:	827	PPCODE:
1149	{	828	{
1150	dREQ;	829	dREQ;
1151		830
1152	req->type = ix;	831	req->type = ix;
1153	req->data = newSVsv (pathname);	832	req->sv1 = newSVsv (pathname);
1154	req->dataptr = SvPVbyte_nolen (req->data);	833	req->ptr1 = SvPVbyte_nolen (req->sv1);
		834
		835	REQ_SEND;
		836	}
		837
		838	void
		839	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		840	ALIAS:
		841	aio_link = EIO_LINK
		842	aio_symlink = EIO_SYMLINK
		843	aio_rename = EIO_RENAME
		844	PPCODE:
		845	{
		846	dREQ;
		847
		848	req->type = ix;
		849	req->sv1 = newSVsv (oldpath);
		850	req->ptr1 = SvPVbyte_nolen (req->sv1);
		851	req->sv2 = newSVsv (newpath);
		852	req->ptr2 = SvPVbyte_nolen (req->sv2);
1155		853
1156	REQ_SEND;	854	REQ_SEND;
1157	}	855	}
1158		856
1159	void	857	void
1160	aio_link (oldpath,newpath,callback=&PL_sv_undef)	858	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1161	SV * oldpath
1162	SV * newpath
1163	SV * callback
1164	ALIAS:
1165	aio_link = REQ_LINK
1166	aio_symlink = REQ_SYMLINK
1167	aio_rename = REQ_RENAME
1168	PPCODE:	859	PPCODE:
1169	{	860	{
1170	dREQ;	861	dREQ;
1171		862
1172	req->type = ix;	863	req->type = EIO_MKNOD;
1173	req->fh = newSVsv (oldpath);	864	req->sv1 = newSVsv (pathname);
1174	req->data2ptr = SvPVbyte_nolen (req->fh);	865	req->ptr1 = SvPVbyte_nolen (req->sv1);
1175	req->data = newSVsv (newpath);	866	req->int2 = (mode_t)mode;
1176	req->dataptr = SvPVbyte_nolen (req->data);	867	req->offs = dev;
1177		868
1178	REQ_SEND;	869	REQ_SEND;
1179	}	870	}
1180		871
1181	void	872	void
1182	aio_sleep (delay,callback=&PL_sv_undef)	873	aio_busy (double delay, SV *callback=&PL_sv_undef)
1183	double delay
1184	SV * callback
1185	PPCODE:	874	PPCODE:
1186	{	875	{
1187	dREQ;	876	dREQ;
1188		877
1189	req->type = REQ_SLEEP;	878	req->type = EIO_BUSY;
1190	req->fd = delay < 0. ? 0 : delay;	879	req->nv1 = delay < 0. ? 0. : delay;
1191	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1192		880
1193	REQ_SEND;	881	REQ_SEND;
1194	}	882	}
1195		883
1196	void	884	void
1197	aio_group (callback=&PL_sv_undef)	885	aio_group (SV *callback=&PL_sv_undef)
1198	SV * callback
1199	PROTOTYPE: ;$	886	PROTOTYPE: ;$
1200	PPCODE:	887	PPCODE:
1201	{	888	{
1202	dREQ;	889	dREQ;
		890
1203	req->type = REQ_GROUP;	891	req->type = EIO_GROUP;
		892
1204	req_send (req);	893	eio_submit (req);
1205	XPUSHs (req_sv (req, AIO_GRP_KLASS));	894	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1206	}	895	}
		896
		897	void
		898	aio_nop (SV *callback=&PL_sv_undef)
		899	ALIAS:
		900	aio_nop = EIO_NOP
		901	aio_sync = EIO_SYNC
		902	PPCODE:
		903	{
		904	dREQ;
		905
		906	req->type = ix;
		907
		908	REQ_SEND;
		909	}
		910
		911	int
		912	aioreq_pri (int pri = 0)
		913	PROTOTYPE: ;$
		914	CODE:
		915	RETVAL = next_pri;
		916	if (items > 0)
		917	{
		918	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		919	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		920	next_pri = pri;
		921	}
		922	OUTPUT:
		923	RETVAL
		924
		925	void
		926	aioreq_nice (int nice = 0)
		927	CODE:
		928	nice = next_pri - nice;
		929	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		930	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		931	next_pri = nice;
1207		932
1208	void	933	void
1209	flush ()	934	flush ()
1210	PROTOTYPE:	935	PROTOTYPE:
1211	CODE:	936	CODE:
1212	while (nreqs)	937	while (eio_nreqs ())
1213	{	938	{
1214	poll_wait ();	939	poll_wait ();
1215	poll_cb ();	940	poll_cb ();
1216	}	941	}
1217		942
1218	void	943	int
1219	poll()	944	poll()
1220	PROTOTYPE:	945	PROTOTYPE:
1221	CODE:	946	CODE:
1222	if (nreqs)
1223	{
1224	poll_wait ();	947	poll_wait ();
1225	poll_cb ();	948	RETVAL = poll_cb ();
1226	}	949	OUTPUT:
		950	RETVAL
1227		951
1228	int	952	int
1229	poll_fileno()	953	poll_fileno()
1230	PROTOTYPE:	954	PROTOTYPE:
1231	CODE:	955	CODE:
…		…
1243		967
1244	void	968	void
1245	poll_wait()	969	poll_wait()
1246	PROTOTYPE:	970	PROTOTYPE:
1247	CODE:	971	CODE:
1248	if (nreqs)
1249	poll_wait ();	972	poll_wait ();
1250		973
1251	int	974	int
1252	nreqs()	975	nreqs()
1253	PROTOTYPE:	976	PROTOTYPE:
1254	CODE:	977	CODE:
1255	RETVAL = nreqs;	978	RETVAL = eio_nreqs ();
1256	OUTPUT:	979	OUTPUT:
1257	RETVAL	980	RETVAL
1258		981
		982	int
		983	nready()
		984	PROTOTYPE:
		985	CODE:
		986	RETVAL = eio_nready ();
		987	OUTPUT:
		988	RETVAL
		989
		990	int
		991	npending()
		992	PROTOTYPE:
		993	CODE:
		994	RETVAL = eio_npending ();
		995	OUTPUT:
		996	RETVAL
		997
		998	int
		999	nthreads()
		1000	PROTOTYPE:
		1001	CODE:
		1002	RETVAL = eio_nthreads ();
		1003	OUTPUT:
		1004	RETVAL
		1005
		1006	void _on_next_submit (SV *cb)
		1007	CODE:
		1008	SvREFCNT_dec (on_next_submit);
		1009	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1010
1259	PROTOTYPES: DISABLE	1011	PROTOTYPES: DISABLE
1260		1012
1261	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1013	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1262		1014
1263	void	1015	void
1264	cancel (aio_req_ornot req)	1016	cancel (aio_req_ornot req)
1265	PROTOTYPE:
1266	CODE:	1017	CODE:
1267	req_cancel (req);	1018	eio_cancel (req);
		1019
		1020	void
		1021	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1022	CODE:
		1023	SvREFCNT_dec (req->callback);
		1024	req->callback = newSVsv (callback);
1268		1025
1269	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1026	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1270		1027
1271	void	1028	void
1272	add (aio_req grp, ...)	1029	add (aio_req grp, ...)
1273	PPCODE:	1030	PPCODE:
1274	{	1031	{
1275	int i;	1032	int i;
1276		1033
1277	if (grp->fd == 2)	1034	if (grp->int1 == 2)
1278	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1035	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1279		1036
1280	for (i = 1; i < items; ++i )	1037	for (i = 1; i < items; ++i )
1281	{	1038	{
		1039	aio_req req;
		1040
1282	if (GIMME_V != G_VOID)	1041	if (GIMME_V != G_VOID)
1283	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1042	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1284		1043
1285	aio_req req = SvAIO_REQ (ST (i));	1044	req = SvAIO_REQ (ST (i));
1286		1045
1287	if (req)	1046	if (req)
1288	{	1047	eio_grp_add (grp, req);
1289	++grp->length;
1290	req->grp = grp;
1291
1292	req->grp_prev = 0;
1293	req->grp_next = grp->grp_first;
1294
1295	if (grp->grp_first)
1296	grp->grp_first->grp_prev = req;
1297
1298	grp->grp_first = req;
1299	}	1048	}
1300	}
1301	}	1049	}
		1050
		1051	void
		1052	cancel_subs (aio_req_ornot req)
		1053	CODE:
		1054	req_cancel_subs (req);
1302		1055
1303	void	1056	void
1304	result (aio_req grp, ...)	1057	result (aio_req grp, ...)
1305	CODE:	1058	CODE:
1306	{	1059	{
1307	int i;	1060	int i;
1308	AV *av = newAV ();	1061	AV *av;
1309		1062
		1063	grp->errorno = errno;
		1064
		1065	av = newAV ();
		1066
1310	for (i = 1; i < items; ++i )	1067	for (i = 1; i < items; ++i )
1311	av_push (av, newSVsv (ST (i)));	1068	av_push (av, newSVsv (ST (i)));
1312		1069
1313	SvREFCNT_dec (grp->data);	1070	SvREFCNT_dec (grp->sv1);
1314	grp->data = (SV *)av;	1071	grp->sv1 = (SV *)av;
1315	}	1072	}
1316		1073
1317	void	1074	void
		1075	errno (aio_req grp, int errorno = errno)
		1076	CODE:
		1077	grp->errorno = errorno;
		1078
		1079	void
1318	feeder_limit (aio_req grp, int limit)	1080	limit (aio_req grp, int limit)
1319	CODE:	1081	CODE:
1320	grp->fd2 = limit;	1082	eio_grp_limit (grp, limit);
1321	aio_grp_feed (grp);
1322		1083
1323	void	1084	void
1324	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)	1085	feed (aio_req grp, SV *callback=&PL_sv_undef)
1325	CODE:	1086	CODE:
1326	{	1087	{
1327	SvREFCNT_dec (grp->fh2);	1088	SvREFCNT_dec (grp->sv2);
1328	grp->fh2 = newSVsv (callback);	1089	grp->sv2 = newSVsv (callback);
1329		1090
1330	if (grp->fd2 <= 0)	1091	if (grp->int2 <= 0)
1331	grp->fd2 = 2;	1092	grp->int2 = 2;
1332		1093
1333	aio_grp_feed (grp);	1094	eio_grp_limit (grp, grp->int2);
1334	}	1095	}
1335		1096

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