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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.56 by root, Mon Oct 23 14:49:51 2006 UTC vs.
Revision 1.136 by root, Sun Apr 19 13:15:55 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>
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	/* perl stupidly overrides readdir and maybe others */
40	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
41	# define NAME_MAX 4096	72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
		81	#else
		82	# define SvVAL64 SvNV
42	#endif	83	#endif
43		84
44	#if __ia64	85	/*****************************************************************************/
45	# define STACKSIZE 65536	86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
46	#else	89	#else
47	# define STACKSIZE 8192	90	# define expect(expr,value) (expr)
48	#endif	91	#endif
49		92
50	enum {	93	#define expect_false(expr) expect ((expr) != 0, 0)
51	REQ_QUIT,	94	#define expect_true(expr) expect ((expr) != 0, 1)
52	REQ_OPEN, REQ_CLOSE,	95
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	96	/*****************************************************************************/
54	REQ_SENDFILE,	97
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	98	static HV *stash;
56	REQ_FSYNC, REQ_FDATASYNC,	99	typedef SV SV8; /* byte-sv, used for argument-checking */
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,
60	REQ_GROUP, REQ_NOP,
61	REQ_SLEEP,
62	};
63		100
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	101	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	102	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		103
67	typedef struct aio_cb	104	#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;	105	SV *callback; \
76	SV *fh, *fh2;	106	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;	107	STRLEN stroffset; \
87	mode_t mode; /* open */	108	SV *self;
88	unsigned char cancelled;
89	} aio_cb;
90		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
		119	enum {
		120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		121	};
		122
		123	#include "libeio/eio.c"
		124
91	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
92	typedef aio_cb *aio_req_ornot;	126	typedef eio_req *aio_req_ornot;
93		127
94	static int started, wanted;	128	static SV *on_next_submit;
95	static volatile int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
96	static int max_outstanding = 1<<30;	130	static int max_outstanding;
97	static int respipe [2];
98		131
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	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		133
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
104	static volatile aio_req ress, rese; /* queue start, queue end */
105
106	static void req_invoke (aio_req req);	135	static void req_cancel (aio_req req);
107	static void req_free (aio_req req);	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	}
108		150
109	/* must be called at most once */	151	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	152	static SV *req_sv (aio_req req, const char *klass)
111	{	153	{
112	if (!req->self)	154	if (!req->self)
…		…
130	return mg ? (aio_req)mg->mg_ptr : 0;	172	return mg ? (aio_req)mg->mg_ptr : 0;
131	}	173	}
132		174
133	static void aio_grp_feed (aio_req grp)	175	static void aio_grp_feed (aio_req grp)
134	{	176	{
135	while (grp->length < grp->fd2)	177	if (grp->sv2 && SvOK (grp->sv2))
136	{	178	{
137	int old_len = grp->length;	179	dSP;
138		180
139	if (grp->fh2 && SvOK (grp->fh2))	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)
140	{	225	{
141	dSP;	226	case EIO_READDIR:
		227	{
		228	SV *rv = &PL_sv_undef;
142		229
143	ENTER;	230	if (req->result >= 0)
144	SAVETMPS;	231	{
145	PUSHMARK (SP);	232	int i;
146	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	233	char *buf = req->ptr2;
147	PUTBACK;	234	AV *av = newAV ();
148	call_sv (grp->fh2, G_VOID | G_EVAL);	235
149	SPAGAIN;	236	av_extend (av, req->result - 1);
150	FREETMPS;	237
151	LEAVE;	238	for (i = 0; i < req->result; ++i)
		239	{
		240	SV *sv = newSVpv (buf, 0);
		241
		242	av_store (av, i, sv);
		243	buf += SvCUR (sv) + 1;
		244	}
		245
		246	rv = sv_2mortal (newRV_noinc ((SV *)av));
		247	}
		248
		249	PUSHs (rv);
		250	}
		251	break;
		252
		253	case EIO_OPEN:
		254	{
		255	/* convert fd to fh */
		256	SV *fh = &PL_sv_undef;
		257
		258	if (req->result >= 0)
		259	{
		260	GV *gv = (GV *)sv_newmortal ();
		261	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		262	char sym [64];
		263	int symlen;
		264
		265	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		266	gv_init (gv, stash, sym, symlen, 0);
		267
		268	symlen = snprintf (
		269	sym,
		270	sizeof (sym),
		271	"%s&=%d",
		272	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		273	req->result
		274	);
		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
		280	PUSHs (fh);
		281	}
		282	break;
		283
		284	case EIO_GROUP:
		285	req->int1 = 2; /* mark group as finished */
		286
		287	if (req->sv1)
		288	{
		289	int i;
		290	AV *av = (AV *)req->sv1;
		291
		292	EXTEND (SP, AvFILL (av) + 1);
		293	for (i = 0; i <= AvFILL (av); ++i)
		294	PUSHs (*av_fetch (av, i, 0));
		295	}
		296	break;
		297
		298	case EIO_NOP:
		299	case EIO_BUSY:
		300	break;
		301
		302	case EIO_READLINK:
		303	if (req->result > 0)
		304	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		305	break;
		306
		307	case EIO_STAT:
		308	case EIO_LSTAT:
		309	case EIO_FSTAT:
		310	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		311	PL_laststatval = req->result;
		312	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		313	PUSHs (sv_2mortal (newSViv (req->result)));
		314	break;
		315
		316	case EIO_READ:
		317	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		318	*SvEND (req->sv2) = 0;
		319	PUSHs (sv_2mortal (newSViv (req->result)));
		320	break;
		321
		322	case EIO_DUP2:
		323	if (req->result > 0)
		324	req->result = 0;
		325	/* FALLTHROUGH */
		326
		327	default:
		328	PUSHs (sv_2mortal (newSViv (req->result)));
		329	break;
152	}	330	}
153		331
154	/* stop if no progress has been made */	332	errno = req->errorno;
155	if (old_len == grp->length)	333
156	{	334	PUTBACK;
157	SvREFCNT_dec (grp->fh2);	335	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
158	grp->fh2 = 0;	336	SPAGAIN;
159	break;	337
160	}	338	FREETMPS;
		339	LEAVE;
		340
		341	PUTBACK;
161	}	342	}
162	}
163		343
164	static void aio_grp_dec (aio_req grp)	344	return !!SvTRUE (ERRSV);
165	{
166	--grp->length;
167
168	/* call feeder, if applicable */
169	aio_grp_feed (grp);
170
171	/* finish, if done */
172	if (!grp->length && grp->fd)
173	{
174	req_invoke (grp);
175	req_free (grp);
176	}
177	}	345	}
178		346
179	static void poll_wait ()
180	{
181	if (nreqs && !ress)
182	{
183	fd_set rfd;
184	FD_ZERO(&rfd);
185	FD_SET(respipe [0], &rfd);
186
187	select (respipe [0] + 1, &rfd, 0, 0, 0);
188	}
189	}
190
191	static void req_invoke (aio_req req)
192	{
193	dSP;
194	int errorno = errno;
195
196	if (req->cancelled || !SvOK (req->callback))
197	return;
198
199	errno = req->errorno;
200
201	ENTER;
202	SAVETMPS;
203	PUSHMARK (SP);
204	EXTEND (SP, 1);
205
206	switch (req->type)
207	{
208	case REQ_READDIR:
209	{
210	SV *rv = &PL_sv_undef;
211
212	if (req->result >= 0)
213	{
214	char *buf = req->data2ptr;
215	AV *av = newAV ();
216
217	while (req->result)
218	{
219	SV *sv = newSVpv (buf, 0);
220
221	av_push (av, sv);
222	buf += SvCUR (sv) + 1;
223	req->result--;
224	}
225
226	rv = sv_2mortal (newRV_noinc ((SV *)av));
227	}
228
229	PUSHs (rv);
230	}
231	break;
232
233	case REQ_OPEN:
234	{
235	/* convert fd to fh */
236	SV *fh;
237
238	PUSHs (sv_2mortal (newSViv (req->result)));
239	PUTBACK;
240	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
241	SPAGAIN;
242
243	fh = SvREFCNT_inc (POPs);
244
245	PUSHMARK (SP);
246	XPUSHs (sv_2mortal (fh));
247	}
248	break;
249
250	case REQ_GROUP:
251	req->fd = 2; /* mark group as finished */
252
253	if (req->data)
254	{
255	int i;
256	AV *av = (AV *)req->data;
257
258	EXTEND (SP, AvFILL (av) + 1);
259	for (i = 0; i <= AvFILL (av); ++i)
260	PUSHs (*av_fetch (av, i, 0));
261	}
262	break;
263
264	case REQ_NOP:
265	case REQ_SLEEP:
266	break;
267
268	default:
269	PUSHs (sv_2mortal (newSViv (req->result)));
270	break;
271	}
272
273
274	PUTBACK;
275	call_sv (req->callback, G_VOID | G_EVAL);
276	SPAGAIN;
277
278	FREETMPS;
279	LEAVE;
280
281	errno = errorno;
282
283	if (SvTRUE (ERRSV))
284	{
285	req_free (req);
286	croak (0);
287	}
288	}
289
290	static void req_free (aio_req req)	347	static void req_destroy (aio_req req)
291	{	348	{
292	if (req->grp)
293	{
294	aio_req grp = req->grp;
295
296	/* unlink request */
297	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
298	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
299
300	if (grp->grp_first == req)
301	grp->grp_first = req->grp_next;
302
303	aio_grp_dec (grp);
304	}
305
306	if (req->self)	349	if (req->self)
307	{	350	{
308	sv_unmagic (req->self, PERL_MAGIC_ext);	351	sv_unmagic (req->self, PERL_MAGIC_ext);
309	SvREFCNT_dec (req->self);	352	SvREFCNT_dec (req->self);
310	}	353	}
311		354
312	SvREFCNT_dec (req->data);
313	SvREFCNT_dec (req->fh);	355	SvREFCNT_dec (req->sv1);
314	SvREFCNT_dec (req->fh2);	356	SvREFCNT_dec (req->sv2);
315	SvREFCNT_dec (req->callback);	357	SvREFCNT_dec (req->callback);
316	Safefree (req->statdata);
317
318	if (req->type == REQ_READDIR && req->result >= 0)
319	free (req->data2ptr);
320		358
321	Safefree (req);	359	Safefree (req);
322	}	360	}
323		361
324	static void req_cancel (aio_req req)	362	static void req_cancel_subs (aio_req grp)
325	{	363	{
326	req->cancelled = 1;	364	aio_req sub;
327		365
328	if (req->type == REQ_GROUP)	366	if (grp->type != EIO_GROUP)
		367	return;
		368
		369	SvREFCNT_dec (grp->sv2);
		370	grp->sv2 = 0;
		371
		372	eio_grp_cancel (grp);
		373	}
		374
		375	#ifdef USE_SOCKETS_AS_HANDLES
		376	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		377	#else
		378	# define TO_SOCKET(x) (x)
		379	#endif
		380
		381	static void
		382	create_respipe (void)
		383	{
		384	int old_readfd = respipe [0];
		385
		386	if (respipe [1] >= 0)
		387	respipe_close (TO_SOCKET (respipe [1]));
		388
		389	#ifdef _WIN32
		390	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		391	#else
		392	if (pipe (respipe))
		393	#endif
		394	croak ("unable to initialize result pipe");
		395
		396	if (old_readfd >= 0)
329	{	397	{
330	aio_req sub;	398	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		399	croak ("unable to initialize result pipe(2)");
331		400
332	for (sub = req->grp_first; sub; sub = sub->grp_next)	401	respipe_close (respipe [0]);
333	req_cancel (sub);	402	respipe [0] = old_readfd;
334	}	403	}
335	}
336		404
		405	#ifdef _WIN32
		406	int arg = 1;
		407	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		408	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		409	#else
		410	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		411	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		412	#endif
		413	croak ("unable to initialize result pipe(3)");
		414
		415	respipe_osf [0] = TO_SOCKET (respipe [0]);
		416	respipe_osf [1] = TO_SOCKET (respipe [1]);
		417	}
		418
		419	static void poll_wait (void)
		420	{
		421	fd_set rfd;
		422
		423	while (eio_nreqs ())
		424	{
		425	int size;
		426
		427	X_LOCK (reslock);
		428	size = res_queue.size;
		429	X_UNLOCK (reslock);
		430
		431	if (size)
		432	return;
		433
		434	etp_maybe_start_thread ();
		435
		436	FD_ZERO (&rfd);
		437	FD_SET (respipe [0], &rfd);
		438
		439	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		440	}
		441	}
		442
337	static int poll_cb ()	443	static int poll_cb (void)
338	{	444	{
339	dSP;
340	int count = 0;
341	int do_croak = 0;
342	aio_req req;
343
344	for (;;)	445	for (;;)
345	{	446	{
346	pthread_mutex_lock (&reslock);	447	int res = eio_poll ();
347	req = ress;
348		448
349	if (req)	449	if (res > 0)
350	{
351	ress = req->next;
352
353	if (!ress)
354	{
355	/* read any signals sent by the worker threads */
356	char buf [32];
357	while (read (respipe [0], buf, 32) == 32)
358	;
359
360	rese = 0;
361	}
362	}
363
364	pthread_mutex_unlock (&reslock);
365
366	if (!req)
367	break;	450	croak (0);
368		451
369	--nreqs;	452	if (!max_outstanding || max_outstanding > eio_nreqs ())
		453	return res;
370		454
371	if (req->type == REQ_QUIT)	455	poll_wait ();
372	started--;
373	else if (req->type == REQ_GROUP && req->length)
374	{
375	req->fd = 1; /* mark request as delayed */
376	continue;
377	}
378	else
379	{
380	if (req->type == REQ_READ)
381	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
382
383	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
384	SvREADONLY_off (req->data);
385
386	if (req->statdata)
387	{
388	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
389	PL_laststatval = req->result;
390	PL_statcache = *(req->statdata);
391	}
392
393	req_invoke (req);
394
395	count++;
396	}
397
398	req_free (req);
399	}	456	}
400
401	return count;
402	}	457	}
403		458
404	static void *aio_proc(void *arg);
405
406	static void start_thread (void)	459	static void atfork_child (void)
407	{	460	{
408	sigset_t fullsigset, oldsigset;	461	create_respipe ();
409	pthread_t tid;
410	pthread_attr_t attr;
411
412	pthread_attr_init (&attr);
413	pthread_attr_setstacksize (&attr, STACKSIZE);
414	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
415
416	sigfillset (&fullsigset);
417	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
418
419	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
420	started++;
421
422	sigprocmask (SIG_SETMASK, &oldsigset, 0);
423	}	462	}
424		463
425	static void req_send (aio_req req)	464	static SV *
		465	get_cb (SV *cb_sv)
426	{	466	{
427	while (started < wanted && nreqs >= started)	467	HV *st;
428	start_thread ();	468	GV *gvp;
		469	CV *cv;
429		470
430	++nreqs;	471	if (!SvOK (cb_sv))
431
432	pthread_mutex_lock (&reqlock);
433
434	req->next = 0;
435
436	if (reqe)
437	{
438	reqe->next = req;
439	reqe = req;
440	}
441	else
442	reqe = reqs = req;
443
444	pthread_cond_signal (&reqwait);
445	pthread_mutex_unlock (&reqlock);
446
447	if (nreqs > max_outstanding)
448	for (;;)
449	{
450	poll_cb ();
451
452	if (nreqs <= max_outstanding)
453	break;
454
455	poll_wait ();
456	}
457	}
458
459	static void end_thread (void)
460	{
461	aio_req req;
462	Newz (0, req, 1, aio_cb);
463	req->type = REQ_QUIT;
464
465	req_send (req);
466	}
467
468	static void min_parallel (int nthreads)
469	{
470	if (wanted < nthreads)
471	wanted = nthreads;
472	}
473
474	static void max_parallel (int nthreads)
475	{
476	int cur = started;
477
478	if (wanted > nthreads)
479	wanted = nthreads;
480
481	while (cur > wanted)
482	{
483	end_thread ();
484	cur--;
485	}
486
487	while (started > wanted)
488	{
489	poll_wait ();
490	poll_cb ();
491	}
492	}
493
494	static void create_pipe ()
495	{
496	if (pipe (respipe))
497	croak ("unable to initialize result pipe");
498
499	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
500	croak ("cannot set result pipe to nonblocking mode");
501
502	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
503	croak ("cannot set result pipe to nonblocking mode");
504	}
505
506	/*****************************************************************************/
507	/* work around various missing functions */
508
509	#if !HAVE_PREADWRITE
510	# define pread aio_pread
511	# define pwrite aio_pwrite
512
513	/*
514	* make our pread/pwrite safe against themselves, but not against
515	* normal read/write by using a mutex. slows down execution a lot,
516	* but that's your problem, not mine.
517	*/
518	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
519
520	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
521	{
522	ssize_t res;
523	off_t ooffset;
524
525	pthread_mutex_lock (&preadwritelock);
526	ooffset = lseek (fd, 0, SEEK_CUR);
527	lseek (fd, offset, SEEK_SET);
528	res = read (fd, buf, count);
529	lseek (fd, ooffset, SEEK_SET);
530	pthread_mutex_unlock (&preadwritelock);
531
532	return res;
533	}
534
535	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
536	{
537	ssize_t res;
538	off_t ooffset;
539
540	pthread_mutex_lock (&preadwritelock);
541	ooffset = lseek (fd, 0, SEEK_CUR);
542	lseek (fd, offset, SEEK_SET);
543	res = write (fd, buf, count);
544	lseek (fd, offset, SEEK_SET);
545	pthread_mutex_unlock (&preadwritelock);
546
547	return res;
548	}
549	#endif
550
551	#if !HAVE_FDATASYNC
552	# define fdatasync fsync
553	#endif
554
555	#if !HAVE_READAHEAD
556	# define readahead aio_readahead
557
558	static ssize_t readahead (int fd, off_t offset, size_t count)
559	{
560	char readahead_buf[4096];
561
562	while (count > 0)
563	{
564	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
565
566	pread (fd, readahead_buf, len, offset);
567	offset += len;
568	count -= len;
569	}
570
571	errno = 0;
572	}
573	#endif
574
575	#if !HAVE_READDIR_R
576	# define readdir_r aio_readdir_r
577
578	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
579
580	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
581	{
582	struct dirent *e;
583	int errorno;
584
585	pthread_mutex_lock (&readdirlock);
586
587	e = readdir (dirp);
588	errorno = errno;
589
590	if (e)
591	{
592	*res = ent;
593	strcpy (ent->d_name, e->d_name);
594	}
595	else
596	*res = 0;
597
598	pthread_mutex_unlock (&readdirlock);
599
600	errno = errorno;
601	return e ? 0 : -1;
602	}
603	#endif
604
605	/* sendfile always needs emulation */
606	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
607	{
608	ssize_t res;
609
610	if (!count)
611	return 0;	472	return 0;
612		473
613	#if HAVE_SENDFILE	474	cv = sv_2cv (cb_sv, &st, &gvp, 0);
614	# if __linux
615	res = sendfile (ofd, ifd, &offset, count);
616		475
617	# elif __freebsd	476	if (!cv)
618	/*	477	croak ("IO::AIO callback must be undef or a CODE reference");
619	* Of course, the freebsd sendfile is a dire hack with no thoughts
620	* wasted on making it similar to other I/O functions.
621	*/
622	{
623	off_t sbytes;
624	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
625		478
626	if (res < 0 && sbytes)	479	return (SV *)cv;
627	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
628	res = sbytes;
629	}
630
631	# elif __hpux
632	res = sendfile (ofd, ifd, offset, count, 0, 0);
633
634	# elif __solaris
635	{
636	struct sendfilevec vec;
637	size_t sbytes;
638
639	vec.sfv_fd = ifd;
640	vec.sfv_flag = 0;
641	vec.sfv_off = offset;
642	vec.sfv_len = count;
643
644	res = sendfilev (ofd, &vec, 1, &sbytes);
645
646	if (res < 0 && sbytes)
647	res = sbytes;
648	}
649
650	# endif
651	#else
652	res = -1;
653	errno = ENOSYS;
654	#endif
655
656	if (res < 0
657	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
658	#if __solaris
659	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
660	#endif
661	)
662	)
663	{
664	/* emulate sendfile. this is a major pain in the ass */
665	char buf[4096];
666	res = 0;
667
668	while (count)
669	{
670	ssize_t cnt;
671
672	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
673
674	if (cnt <= 0)
675	{
676	if (cnt && !res) res = -1;
677	break;
678	}
679
680	cnt = write (ofd, buf, cnt);
681
682	if (cnt <= 0)
683	{
684	if (cnt && !res) res = -1;
685	break;
686	}
687
688	offset += cnt;
689	res += cnt;
690	count -= cnt;
691	}
692	}
693
694	return res;
695	}
696
697	/* read a full directory */
698	static int scandir_ (const char *path, void **namesp)
699	{
700	DIR *dirp = opendir (path);
701	union
702	{
703	struct dirent d;
704	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
705	} u;
706	struct dirent *entp;
707	char *name, *names;
708	int memlen = 4096;
709	int memofs = 0;
710	int res = 0;
711	int errorno;
712
713	if (!dirp)
714	return -1;
715
716	names = malloc (memlen);
717
718	for (;;)
719	{
720	errno = 0, readdir_r (dirp, &u.d, &entp);
721
722	if (!entp)
723	break;
724
725	name = entp->d_name;
726
727	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
728	{
729	int len = strlen (name) + 1;
730
731	res++;
732
733	while (memofs + len > memlen)
734	{
735	memlen *= 2;
736	names = realloc (names, memlen);
737	if (!names)
738	break;
739	}
740
741	memcpy (names + memofs, name, len);
742	memofs += len;
743	}
744	}
745
746	errorno = errno;
747	closedir (dirp);
748
749	if (errorno)
750	{
751	free (names);
752	errno = errorno;
753	res = -1;
754	}
755
756	*namesp = (void *)names;
757	return res;
758	}
759
760	/*****************************************************************************/
761
762	static void *aio_proc (void *thr_arg)
763	{
764	aio_req req;
765	int type;
766
767	do
768	{
769	pthread_mutex_lock (&reqlock);
770
771	for (;;)
772	{
773	req = reqs;
774
775	if (reqs)
776	{
777	reqs = reqs->next;
778	if (!reqs) reqe = 0;
779	}
780
781	if (req)
782	break;
783
784	pthread_cond_wait (&reqwait, &reqlock);
785	}
786
787	pthread_mutex_unlock (&reqlock);
788
789	errno = 0; /* strictly unnecessary */
790
791	if (!req->cancelled)
792	switch (type = req->type) /* remember type for QUIT check */
793	{
794	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
795	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
796
797	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
798	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
799
800	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
801	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
802	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
803
804	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
805	case REQ_CLOSE: req->result = close (req->fd); break;
806	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
807	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
808	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
809	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
810	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
811
812	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
813	case REQ_FSYNC: req->result = fsync (req->fd); break;
814	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
815
816	case REQ_SLEEP:
817	{
818	struct timeval tv;
819
820	tv.tv_sec = req->fd;
821	tv.tv_usec = req->fd2;
822
823	req->result = select (0, 0, 0, 0, &tv);
824	}
825
826	case REQ_GROUP:
827	case REQ_NOP:
828	case REQ_QUIT:
829	break;
830
831	default:
832	req->result = ENOSYS;
833	break;
834	}
835
836	req->errorno = errno;
837
838	pthread_mutex_lock (&reslock);
839
840	req->next = 0;
841
842	if (rese)
843	{
844	rese->next = req;
845	rese = req;
846	}
847	else
848	{
849	rese = ress = req;
850
851	/* write a dummy byte to the pipe so fh becomes ready */
852	write (respipe [1], &respipe, 1);
853	}
854
855	pthread_mutex_unlock (&reslock);
856	}
857	while (type != REQ_QUIT);
858
859	return 0;
860	}
861
862	/*****************************************************************************/
863
864	static void atfork_prepare (void)
865	{
866	pthread_mutex_lock (&reqlock);
867	pthread_mutex_lock (&reslock);
868	#if !HAVE_PREADWRITE
869	pthread_mutex_lock (&preadwritelock);
870	#endif
871	#if !HAVE_READDIR_R
872	pthread_mutex_lock (&readdirlock);
873	#endif
874	}
875
876	static void atfork_parent (void)
877	{
878	#if !HAVE_READDIR_R
879	pthread_mutex_unlock (&readdirlock);
880	#endif
881	#if !HAVE_PREADWRITE
882	pthread_mutex_unlock (&preadwritelock);
883	#endif
884	pthread_mutex_unlock (&reslock);
885	pthread_mutex_unlock (&reqlock);
886	}
887
888	static void atfork_child (void)
889	{
890	aio_req prv;
891
892	started = 0;
893
894	while (reqs)
895	{
896	prv = reqs;
897	reqs = prv->next;
898	req_free (prv);
899	}
900
901	reqs = reqe = 0;
902
903	while (ress)
904	{
905	prv = ress;
906	ress = prv->next;
907	req_free (prv);
908	}
909
910	ress = rese = 0;
911
912	close (respipe [0]);
913	close (respipe [1]);
914	create_pipe ();
915
916	atfork_parent ();
917	}	480	}
918		481
919	#define dREQ \	482	#define dREQ \
		483	SV *cb_cv; \
920	aio_req req; \	484	aio_req req; \
		485	int req_pri = next_pri; \
		486	next_pri = EIO_PRI_DEFAULT; \
921	\	487	\
922	if (SvOK (callback) && !SvROK (callback)) \	488	cb_cv = get_cb (callback); \
923	croak ("callback must be undef or of reference type"); \
924	\	489	\
925	Newz (0, req, 1, aio_cb); \	490	Newz (0, req, 1, eio_req); \
926	if (!req) \	491	if (!req) \
927	croak ("out of memory during aio_req allocation"); \	492	croak ("out of memory during eio_req allocation"); \
928	\	493	\
929	req->callback = newSVsv (callback)	494	req->callback = SvREFCNT_inc (cb_cv); \
		495	req->pri = req_pri
930		496
931	#define REQ_SEND \	497	#define REQ_SEND \
		498	PUTBACK; \
932	req_send (req); \	499	req_submit (req); \
		500	SPAGAIN; \
933	\	501	\
934	if (GIMME_V != G_VOID) \	502	if (GIMME_V != G_VOID) \
935	XPUSHs (req_sv (req, AIO_REQ_KLASS));	503	XPUSHs (req_sv (req, AIO_REQ_KLASS));
936		504
		505	static int
		506	extract_fd (SV *fh, int wr)
		507	{
		508	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		509
		510	if (fd < 0)
		511	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		512
		513	return fd;
		514	}
		515
937	MODULE = IO::AIO PACKAGE = IO::AIO	516	MODULE = IO::AIO PACKAGE = IO::AIO
938		517
939	PROTOTYPES: ENABLE	518	PROTOTYPES: ENABLE
940		519
941	BOOT:	520	BOOT:
942	{	521	{
943	HV *stash = gv_stashpv ("IO::AIO", 1);	522	stash = gv_stashpv ("IO::AIO", 1);
		523
944	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	524	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
945	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	525	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
946	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	526	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		527	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		528	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		529	#ifndef _WIN32
		530	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		531	#endif
		532	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		533	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		534	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		535	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
947		536
948	create_pipe ();	537	create_respipe ();
949	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
950	}
951		538
		539	if (eio_init (want_poll, done_poll) < 0)
		540	croak ("IO::AIO: unable to initialise eio library");
		541
		542	/* atfork child called in fifo order, so before eio's handler */
		543	X_THREAD_ATFORK (0, 0, atfork_child);
		544	}
		545
952	void	546	void
953	min_parallel (nthreads)	547	max_poll_reqs (int nreqs)
954	int nthreads
955	PROTOTYPE: $	548	PROTOTYPE: $
		549	CODE:
		550	eio_set_max_poll_reqs (nreqs);
956		551
957	void	552	void
958	max_parallel (nthreads)	553	max_poll_time (double nseconds)
959	int nthreads
960	PROTOTYPE: $	554	PROTOTYPE: $
961
962	int
963	max_outstanding (nreqs)
964	int nreqs
965	PROTOTYPE: $
966	CODE:	555	CODE:
967	RETVAL = max_outstanding;	556	eio_set_max_poll_time (nseconds);
		557
		558	void
		559	min_parallel (int nthreads)
		560	PROTOTYPE: $
		561	CODE:
		562	eio_set_min_parallel (nthreads);
		563
		564	void
		565	max_parallel (int nthreads)
		566	PROTOTYPE: $
		567	CODE:
		568	eio_set_max_parallel (nthreads);
		569
		570	void
		571	max_idle (int nthreads)
		572	PROTOTYPE: $
		573	CODE:
		574	eio_set_max_idle (nthreads);
		575
		576	void
		577	max_outstanding (int maxreqs)
		578	PROTOTYPE: $
		579	CODE:
968	max_outstanding = nreqs;	580	max_outstanding = maxreqs;
969		581
970	void	582	void
971	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	583	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
972	SV * pathname
973	int flags
974	int mode
975	SV * callback
976	PROTOTYPE: $$$;$	584	PROTOTYPE: $$$;$
977	PPCODE:	585	PPCODE:
978	{	586	{
979	dREQ;	587	dREQ;
980		588
981	req->type = REQ_OPEN;	589	req->type = EIO_OPEN;
982	req->data = newSVsv (pathname);	590	req->sv1 = newSVsv (pathname);
983	req->dataptr = SvPVbyte_nolen (req->data);	591	req->ptr1 = SvPVbyte_nolen (req->sv1);
984	req->fd = flags;	592	req->int1 = flags;
985	req->mode = mode;	593	req->int2 = mode;
986		594
987	REQ_SEND;	595	REQ_SEND;
988	}	596	}
989		597
990	void	598	void
991	aio_close (fh,callback=&PL_sv_undef)	599	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
992	SV * fh
993	SV * callback
994	PROTOTYPE: $;$	600	PROTOTYPE: $;$
995	ALIAS:	601	ALIAS:
996	aio_close = REQ_CLOSE
997	aio_fsync = REQ_FSYNC	602	aio_fsync = EIO_FSYNC
998	aio_fdatasync = REQ_FDATASYNC	603	aio_fdatasync = EIO_FDATASYNC
999	PPCODE:	604	PPCODE:
1000	{	605	{
		606	int fd = extract_fd (fh, 0);
1001	dREQ;	607	dREQ;
1002		608
1003	req->type = ix;	609	req->type = ix;
1004	req->fh = newSVsv (fh);	610	req->sv1 = newSVsv (fh);
1005	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	611	req->int1 = fd;
1006		612
1007	REQ_SEND (req);	613	REQ_SEND (req);
1008	}	614	}
1009		615
1010	void	616	void
		617	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		618	PROTOTYPE: $$$$;$
		619	PPCODE:
		620	{
		621	int fd = extract_fd (fh, 0);
		622	dREQ;
		623
		624	req->type = EIO_SYNC_FILE_RANGE;
		625	req->sv1 = newSVsv (fh);
		626	req->int1 = fd;
		627	req->offs = SvVAL64 (offset);
		628	req->size = SvVAL64 (nbytes);
		629	req->int2 = flags;
		630
		631	REQ_SEND (req);
		632	}
		633
		634	void
		635	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		636	PROTOTYPE: $;$
		637	PPCODE:
		638	{
		639	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		640	int fd = extract_fd (fh, 0);
		641	dREQ;
		642
		643	if (close_pipe < 0)
		644	{
		645	int pipefd [2];
		646
		647	if (pipe (pipefd) < 0
		648	|| close (pipefd [1]) < 0
		649	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		650	abort (); /*D*/
		651
		652	close_pipe = pipefd [0];
		653	}
		654
		655	req->type = EIO_DUP2;
		656	req->int1 = close_pipe;
		657	req->sv2 = newSVsv (fh);
		658	req->int2 = fd;
		659
		660	REQ_SEND (req);
		661	}
		662
		663	void
1011	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	664	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1012	SV * fh
1013	UV offset
1014	UV length
1015	SV * data
1016	UV dataoffset
1017	SV * callback
1018	ALIAS:	665	ALIAS:
1019	aio_read = REQ_READ	666	aio_read = EIO_READ
1020	aio_write = REQ_WRITE	667	aio_write = EIO_WRITE
1021	PROTOTYPE: $$$$$;$	668	PROTOTYPE: $$$$$;$
1022	PPCODE:	669	PPCODE:
1023	{	670	{
1024	aio_req req;
1025	STRLEN svlen;	671	STRLEN svlen;
1026	char *svptr = SvPVbyte (data, svlen);	672	char *svptr = SvPVbyte (data, svlen);
		673	UV len = SvUV (length);
		674	int fd;
		675
		676	if (SvTYPE (data) > SVt_PVMG)
		677	croak ("illegal data argument '%s', must be plain scalar string", SvPV_nolen (data));
1027		678
1028	SvUPGRADE (data, SVt_PV);	679	SvUPGRADE (data, SVt_PV);
1029	SvPOK_on (data);	680	SvPOK_only (data);
1030		681
1031	if (dataoffset < 0)	682	if (dataoffset < 0)
1032	dataoffset += svlen;	683	dataoffset += svlen;
1033		684
1034	if (dataoffset < 0 || dataoffset > svlen)	685	if (dataoffset < 0 || dataoffset > svlen)
1035	croak ("data offset outside of string");	686	croak ("dataoffset outside of data scalar");
1036		687
1037	if (ix == REQ_WRITE)	688	if (ix == EIO_WRITE)
1038	{	689	{
1039	/* write: check length and adjust. */	690	/* write: check length and adjust. */
1040	if (length < 0 || length + dataoffset > svlen)	691	if (!SvOK (length) || len + dataoffset > svlen)
1041	length = svlen - dataoffset;	692	len = svlen - dataoffset;
1042	}	693	}
1043	else	694	else
1044	{	695	{
1045	/* read: grow scalar as necessary */	696	/* read: grow scalar as necessary */
1046	svptr = SvGROW (data, length + dataoffset);	697	svptr = SvGROW (data, len + dataoffset + 1);
1047	}	698	}
1048		699
1049	if (length < 0)	700	if (len < 0)
1050	croak ("length must not be negative");	701	croak ("length must not be negative");
		702
		703	fd = extract_fd (fh, ix == EIO_WRITE);
1051		704
1052	{	705	{
1053	dREQ;	706	dREQ;
1054		707
1055	req->type = ix;	708	req->type = ix;
1056	req->fh = newSVsv (fh);	709	req->sv1 = newSVsv (fh);
1057	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	710	req->int1 = fd;
1058	: IoOFP (sv_2io (fh)));	711	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1059	req->offset = offset;	712	req->size = len;
1060	req->length = length;
1061	req->data = SvREFCNT_inc (data);	713	req->sv2 = SvREFCNT_inc (data);
1062	req->dataptr = (char *)svptr + dataoffset;	714	req->ptr2 = (char *)svptr + dataoffset;
		715	req->stroffset = dataoffset;
1063		716
1064	if (!SvREADONLY (data))	717	if (!SvREADONLY (data))
1065	{	718	{
1066	SvREADONLY_on (data);	719	SvREADONLY_on (data);
1067	req->data2ptr = (void *)data;	720	req->flags |= FLAG_SV2_RO_OFF;
1068	}	721	}
1069		722
1070	REQ_SEND;	723	REQ_SEND;
1071	}	724	}
1072	}	725	}
1073		726
1074	void	727	void
		728	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		729	PROTOTYPE: $$;$
		730	PPCODE:
		731	{
		732	SV *data;
		733	dREQ;
		734
		735	req->type = EIO_READLINK;
		736	req->sv1 = newSVsv (path);
		737	req->ptr1 = SvPVbyte_nolen (req->sv1);
		738
		739	REQ_SEND;
		740	}
		741
		742	void
1075	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	743	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1076	SV * out_fh
1077	SV * in_fh
1078	UV in_offset
1079	UV length
1080	SV * callback
1081	PROTOTYPE: $$$$;$	744	PROTOTYPE: $$$$;$
1082	PPCODE:	745	PPCODE:
1083	{	746	{
		747	int ifd = extract_fd (in_fh , 0);
		748	int ofd = extract_fd (out_fh, 0);
1084	dREQ;	749	dREQ;
1085		750
1086	req->type = REQ_SENDFILE;	751	req->type = EIO_SENDFILE;
1087	req->fh = newSVsv (out_fh);	752	req->sv1 = newSVsv (out_fh);
1088	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	753	req->int1 = ofd;
1089	req->fh2 = newSVsv (in_fh);	754	req->sv2 = newSVsv (in_fh);
1090	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	755	req->int2 = ifd;
1091	req->offset = in_offset;	756	req->offs = SvVAL64 (in_offset);
1092	req->length = length;	757	req->size = length;
1093		758
1094	REQ_SEND;	759	REQ_SEND;
1095	}	760	}
1096		761
1097	void	762	void
1098	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	763	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1099	SV * fh
1100	UV offset
1101	IV length
1102	SV * callback
1103	PROTOTYPE: $$$;$	764	PROTOTYPE: $$$;$
1104	PPCODE:	765	PPCODE:
1105	{	766	{
		767	int fd = extract_fd (fh, 0);
1106	dREQ;	768	dREQ;
1107		769
1108	req->type = REQ_READAHEAD;	770	req->type = EIO_READAHEAD;
1109	req->fh = newSVsv (fh);	771	req->sv1 = newSVsv (fh);
1110	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	772	req->int1 = fd;
1111	req->offset = offset;	773	req->offs = SvVAL64 (offset);
1112	req->length = length;	774	req->size = length;
1113		775
1114	REQ_SEND;	776	REQ_SEND;
1115	}	777	}
1116		778
1117	void	779	void
1118	aio_stat (fh_or_path,callback=&PL_sv_undef)	780	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1119	SV * fh_or_path
1120	SV * callback
1121	ALIAS:	781	ALIAS:
1122	aio_stat = REQ_STAT	782	aio_stat = EIO_STAT
1123	aio_lstat = REQ_LSTAT	783	aio_lstat = EIO_LSTAT
1124	PPCODE:	784	PPCODE:
1125	{	785	{
1126	dREQ;	786	dREQ;
1127		787
1128	New (0, req->statdata, 1, Stat_t);	788	req->sv1 = newSVsv (fh_or_path);
1129	if (!req->statdata)
1130	{
1131	req_free (req);
1132	croak ("out of memory during aio_req->statdata allocation");
1133	}
1134		789
1135	if (SvPOK (fh_or_path))	790	if (SvPOK (req->sv1))
1136	{	791	{
1137	req->type = ix;	792	req->type = ix;
1138	req->data = newSVsv (fh_or_path);
1139	req->dataptr = SvPVbyte_nolen (req->data);	793	req->ptr1 = SvPVbyte_nolen (req->sv1);
1140	}	794	}
1141	else	795	else
1142	{	796	{
1143	req->type = REQ_FSTAT;	797	req->type = EIO_FSTAT;
1144	req->fh = newSVsv (fh_or_path);
1145	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	798	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1146	}	799	}
1147		800
1148	REQ_SEND;	801	REQ_SEND;
1149	}	802	}
1150		803
1151	void	804	void
		805	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		806	PPCODE:
		807	{
		808	dREQ;
		809
		810	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		811	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		812	req->sv1 = newSVsv (fh_or_path);
		813
		814	if (SvPOK (req->sv1))
		815	{
		816	req->type = EIO_UTIME;
		817	req->ptr1 = SvPVbyte_nolen (req->sv1);
		818	}
		819	else
		820	{
		821	req->type = EIO_FUTIME;
		822	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		823	}
		824
		825	REQ_SEND;
		826	}
		827
		828	void
		829	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		830	PPCODE:
		831	{
		832	dREQ;
		833
		834	req->sv1 = newSVsv (fh_or_path);
		835	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		836
		837	if (SvPOK (req->sv1))
		838	{
		839	req->type = EIO_TRUNCATE;
		840	req->ptr1 = SvPVbyte_nolen (req->sv1);
		841	}
		842	else
		843	{
		844	req->type = EIO_FTRUNCATE;
		845	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		846	}
		847
		848	REQ_SEND;
		849	}
		850
		851	void
		852	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		853	ALIAS:
		854	aio_chmod = EIO_CHMOD
		855	aio_mkdir = EIO_MKDIR
		856	PPCODE:
		857	{
		858	dREQ;
		859
		860	req->int2 = mode;
		861	req->sv1 = newSVsv (fh_or_path);
		862
		863	if (SvPOK (req->sv1))
		864	{
		865	req->type = ix;
		866	req->ptr1 = SvPVbyte_nolen (req->sv1);
		867	}
		868	else
		869	{
		870	req->type = EIO_FCHMOD;
		871	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		872	}
		873
		874	REQ_SEND;
		875	}
		876
		877	void
		878	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		879	PPCODE:
		880	{
		881	dREQ;
		882
		883	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		884	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		885	req->sv1 = newSVsv (fh_or_path);
		886
		887	if (SvPOK (req->sv1))
		888	{
		889	req->type = EIO_CHOWN;
		890	req->ptr1 = SvPVbyte_nolen (req->sv1);
		891	}
		892	else
		893	{
		894	req->type = EIO_FCHOWN;
		895	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		896	}
		897
		898	REQ_SEND;
		899	}
		900
		901	void
1152	aio_unlink (pathname,callback=&PL_sv_undef)	902	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1153	SV * pathname
1154	SV * callback
1155	ALIAS:	903	ALIAS:
1156	aio_unlink = REQ_UNLINK	904	aio_unlink = EIO_UNLINK
1157	aio_rmdir = REQ_RMDIR	905	aio_rmdir = EIO_RMDIR
1158	aio_readdir = REQ_READDIR	906	aio_readdir = EIO_READDIR
1159	PPCODE:	907	PPCODE:
1160	{	908	{
1161	dREQ;	909	dREQ;
1162		910
1163	req->type = ix;	911	req->type = ix;
1164	req->data = newSVsv (pathname);	912	req->sv1 = newSVsv (pathname);
1165	req->dataptr = SvPVbyte_nolen (req->data);	913	req->ptr1 = SvPVbyte_nolen (req->sv1);
		914
		915	REQ_SEND;
		916	}
		917
		918	void
		919	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		920	ALIAS:
		921	aio_link = EIO_LINK
		922	aio_symlink = EIO_SYMLINK
		923	aio_rename = EIO_RENAME
		924	PPCODE:
		925	{
		926	dREQ;
		927
		928	req->type = ix;
		929	req->sv1 = newSVsv (oldpath);
		930	req->ptr1 = SvPVbyte_nolen (req->sv1);
		931	req->sv2 = newSVsv (newpath);
		932	req->ptr2 = SvPVbyte_nolen (req->sv2);
1166		933
1167	REQ_SEND;	934	REQ_SEND;
1168	}	935	}
1169		936
1170	void	937	void
1171	aio_link (oldpath,newpath,callback=&PL_sv_undef)	938	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1172	SV * oldpath
1173	SV * newpath
1174	SV * callback
1175	ALIAS:
1176	aio_link = REQ_LINK
1177	aio_symlink = REQ_SYMLINK
1178	aio_rename = REQ_RENAME
1179	PPCODE:	939	PPCODE:
1180	{	940	{
1181	dREQ;	941	dREQ;
1182		942
1183	req->type = ix;	943	req->type = EIO_MKNOD;
1184	req->fh = newSVsv (oldpath);	944	req->sv1 = newSVsv (pathname);
1185	req->data2ptr = SvPVbyte_nolen (req->fh);	945	req->ptr1 = SvPVbyte_nolen (req->sv1);
1186	req->data = newSVsv (newpath);	946	req->int2 = (mode_t)mode;
1187	req->dataptr = SvPVbyte_nolen (req->data);	947	req->offs = dev;
1188		948
1189	REQ_SEND;	949	REQ_SEND;
1190	}	950	}
1191		951
1192	void	952	void
1193	aio_sleep (delay,callback=&PL_sv_undef)	953	aio_busy (double delay, SV *callback=&PL_sv_undef)
1194	double delay
1195	SV * callback
1196	PPCODE:	954	PPCODE:
1197	{	955	{
1198	dREQ;	956	dREQ;
1199		957
1200	req->type = REQ_SLEEP;	958	req->type = EIO_BUSY;
1201	req->fd = delay < 0. ? 0 : delay;	959	req->nv1 = delay < 0. ? 0. : delay;
1202	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1203		960
1204	REQ_SEND;	961	REQ_SEND;
1205	}	962	}
1206		963
1207	void	964	void
1208	aio_group (callback=&PL_sv_undef)	965	aio_group (SV *callback=&PL_sv_undef)
1209	SV * callback
1210	PROTOTYPE: ;$	966	PROTOTYPE: ;$
1211	PPCODE:	967	PPCODE:
1212	{	968	{
1213	dREQ;	969	dREQ;
		970
1214	req->type = REQ_GROUP;	971	req->type = EIO_GROUP;
		972
1215	req_send (req);	973	req_submit (req);
1216	XPUSHs (req_sv (req, AIO_GRP_KLASS));	974	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1217	}	975	}
1218		976
1219	void	977	void
1220	aio_nop (callback=&PL_sv_undef)	978	aio_nop (SV *callback=&PL_sv_undef)
1221	SV * callback	979	ALIAS:
		980	aio_nop = EIO_NOP
		981	aio_sync = EIO_SYNC
1222	PPCODE:	982	PPCODE:
1223	{	983	{
1224	dREQ;	984	dREQ;
1225		985
1226	req->type = REQ_NOP;	986	req->type = ix;
1227		987
1228	REQ_SEND;	988	REQ_SEND;
1229	}	989	}
		990
		991	int
		992	aioreq_pri (int pri = 0)
		993	PROTOTYPE: ;$
		994	CODE:
		995	RETVAL = next_pri;
		996	if (items > 0)
		997	{
		998	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		999	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1000	next_pri = pri;
		1001	}
		1002	OUTPUT:
		1003	RETVAL
		1004
		1005	void
		1006	aioreq_nice (int nice = 0)
		1007	CODE:
		1008	nice = next_pri - nice;
		1009	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1010	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1011	next_pri = nice;
1230		1012
1231	void	1013	void
1232	flush ()	1014	flush ()
1233	PROTOTYPE:	1015	PROTOTYPE:
1234	CODE:	1016	CODE:
1235	while (nreqs)	1017	while (eio_nreqs ())
1236	{	1018	{
1237	poll_wait ();	1019	poll_wait ();
1238	poll_cb ();	1020	poll_cb ();
1239	}	1021	}
1240		1022
1241	void	1023	int
1242	poll()	1024	poll()
1243	PROTOTYPE:	1025	PROTOTYPE:
1244	CODE:	1026	CODE:
1245	if (nreqs)
1246	{
1247	poll_wait ();	1027	poll_wait ();
1248	poll_cb ();	1028	RETVAL = poll_cb ();
1249	}	1029	OUTPUT:
		1030	RETVAL
1250		1031
1251	int	1032	int
1252	poll_fileno()	1033	poll_fileno()
1253	PROTOTYPE:	1034	PROTOTYPE:
1254	CODE:	1035	CODE:
…		…
1266		1047
1267	void	1048	void
1268	poll_wait()	1049	poll_wait()
1269	PROTOTYPE:	1050	PROTOTYPE:
1270	CODE:	1051	CODE:
1271	if (nreqs)
1272	poll_wait ();	1052	poll_wait ();
1273		1053
1274	int	1054	int
1275	nreqs()	1055	nreqs()
1276	PROTOTYPE:	1056	PROTOTYPE:
1277	CODE:	1057	CODE:
1278	RETVAL = nreqs;	1058	RETVAL = eio_nreqs ();
1279	OUTPUT:	1059	OUTPUT:
1280	RETVAL	1060	RETVAL
1281		1061
		1062	int
		1063	nready()
		1064	PROTOTYPE:
		1065	CODE:
		1066	RETVAL = eio_nready ();
		1067	OUTPUT:
		1068	RETVAL
		1069
		1070	int
		1071	npending()
		1072	PROTOTYPE:
		1073	CODE:
		1074	RETVAL = eio_npending ();
		1075	OUTPUT:
		1076	RETVAL
		1077
		1078	int
		1079	nthreads()
		1080	PROTOTYPE:
		1081	CODE:
		1082	RETVAL = eio_nthreads ();
		1083	OUTPUT:
		1084	RETVAL
		1085
		1086	void _on_next_submit (SV *cb)
		1087	CODE:
		1088	SvREFCNT_dec (on_next_submit);
		1089	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1090
1282	PROTOTYPES: DISABLE	1091	PROTOTYPES: DISABLE
1283		1092
1284	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1093	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1285		1094
1286	void	1095	void
1287	cancel (aio_req_ornot req)	1096	cancel (aio_req_ornot req)
1288	PROTOTYPE:
1289	CODE:	1097	CODE:
1290	req_cancel (req);	1098	eio_cancel (req);
1291		1099
1292	void	1100	void
1293	cb (aio_req req, SV *callback=&PL_sv_undef)	1101	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1294	CODE:	1102	PPCODE:
		1103	{
		1104	if (GIMME_V != G_VOID)
		1105	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1106
		1107	if (items > 1)
		1108	{
		1109	SV *cb_cv = get_cb (callback);
		1110
1295	SvREFCNT_dec (req->callback);	1111	SvREFCNT_dec (req->callback);
1296	req->callback = newSVsv (callback);	1112	req->callback = SvREFCNT_inc (cb_cv);
		1113	}
		1114	}
1297		1115
1298	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1116	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1299		1117
1300	void	1118	void
1301	add (aio_req grp, ...)	1119	add (aio_req grp, ...)
1302	PPCODE:	1120	PPCODE:
1303	{	1121	{
1304	int i;	1122	int i;
1305	aio_req req;
1306		1123
1307	if (grp->fd == 2)	1124	if (grp->int1 == 2)
1308	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1125	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1309		1126
1310	for (i = 1; i < items; ++i )	1127	for (i = 1; i < items; ++i )
1311	{	1128	{
		1129	aio_req req;
		1130
1312	if (GIMME_V != G_VOID)	1131	if (GIMME_V != G_VOID)
1313	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1132	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1314		1133
1315	req = SvAIO_REQ (ST (i));	1134	req = SvAIO_REQ (ST (i));
1316		1135
1317	if (req)	1136	if (req)
1318	{	1137	eio_grp_add (grp, req);
1319	++grp->length;
1320	req->grp = grp;
1321
1322	req->grp_prev = 0;
1323	req->grp_next = grp->grp_first;
1324
1325	if (grp->grp_first)
1326	grp->grp_first->grp_prev = req;
1327
1328	grp->grp_first = req;
1329	}	1138	}
1330	}
1331	}	1139	}
		1140
		1141	void
		1142	cancel_subs (aio_req_ornot req)
		1143	CODE:
		1144	req_cancel_subs (req);
1332		1145
1333	void	1146	void
1334	result (aio_req grp, ...)	1147	result (aio_req grp, ...)
1335	CODE:	1148	CODE:
1336	{	1149	{
1337	int i;	1150	int i;
		1151	AV *av;
		1152
		1153	grp->errorno = errno;
		1154
1338	AV *av = newAV ();	1155	av = newAV ();
1339		1156
1340	for (i = 1; i < items; ++i )	1157	for (i = 1; i < items; ++i )
1341	av_push (av, newSVsv (ST (i)));	1158	av_push (av, newSVsv (ST (i)));
1342		1159
1343	SvREFCNT_dec (grp->data);	1160	SvREFCNT_dec (grp->sv1);
1344	grp->data = (SV *)av;	1161	grp->sv1 = (SV *)av;
1345	}	1162	}
1346		1163
1347	void	1164	void
		1165	errno (aio_req grp, int errorno = errno)
		1166	CODE:
		1167	grp->errorno = errorno;
		1168
		1169	void
1348	feed_limit (aio_req grp, int limit)	1170	limit (aio_req grp, int limit)
1349	CODE:	1171	CODE:
1350	grp->fd2 = limit;	1172	eio_grp_limit (grp, limit);
1351	aio_grp_feed (grp);
1352		1173
1353	void	1174	void
1354	feed (aio_req grp, SV *callback=&PL_sv_undef)	1175	feed (aio_req grp, SV *callback=&PL_sv_undef)
1355	CODE:	1176	CODE:
1356	{	1177	{
1357	SvREFCNT_dec (grp->fh2);	1178	SvREFCNT_dec (grp->sv2);
1358	grp->fh2 = newSVsv (callback);	1179	grp->sv2 = newSVsv (callback);
		1180	grp->feed = aio_grp_feed;
1359		1181
1360	if (grp->fd2 <= 0)	1182	if (grp->int2 <= 0)
1361	grp->fd2 = 2;	1183	grp->int2 = 2;
1362		1184
1363	aio_grp_feed (grp);	1185	eio_grp_limit (grp, grp->int2);
1364	}	1186	}
1365		1187

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