[ViewVC] Diff of: cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.34 by root, Tue Aug 23 00:03:14 2005 UTC vs.
Revision 1.48 by root, Sun Oct 22 10:33:19 2006 UTC

…		…
7		7
8	#include "autoconf/config.h"	8	#include "autoconf/config.h"
9		9
10	#include <pthread.h>	10	#include <pthread.h>
11		11
		12	#include <stddef.h>
		13	#include <errno.h>
		14	#include <sys/time.h>
		15	#include <sys/select.h>
12	#include <sys/types.h>	16	#include <sys/types.h>
13	#include <sys/stat.h>	17	#include <sys/stat.h>
14		18	#include <limits.h>
15	#include <unistd.h>	19	#include <unistd.h>
16	#include <fcntl.h>	20	#include <fcntl.h>
17	#include <signal.h>	21	#include <signal.h>
18	#include <sched.h>	22	#include <sched.h>
19		23
…		…
23	# elif __freebsd	27	# elif __freebsd
24	# include <sys/socket.h>	28	# include <sys/socket.h>
25	# include <sys/uio.h>	29	# include <sys/uio.h>
26	# elif __hpux	30	# elif __hpux
27	# include <sys/socket.h>	31	# include <sys/socket.h>
		32	# elif __solaris /* not yet */
		33	# include <sys/sendfile.h>
28	# else	34	# else
29	# error sendfile support requested but not available	35	# error sendfile support requested but not available
30	# endif	36	# endif
31	#endif	37	#endif
32		38
		39	/* used for struct dirent, AIX doesn't provide it */
		40	#ifndef NAME_MAX
		41	# define NAME_MAX 4096
		42	#endif
		43
33	#if __ia64	44	#if __ia64
34	# define STACKSIZE 65536	45	# define STACKSIZE 65536
35	#else	46	#else
36	# define STACKSIZE 4096	47	# define STACKSIZE 8192
37	#endif	48	#endif
38		49
39	enum {	50	enum {
40	REQ_QUIT,	51	REQ_QUIT,
41	REQ_OPEN, REQ_CLOSE,	52	REQ_OPEN, REQ_CLOSE,
42	REQ_READ, REQ_WRITE, REQ_READAHEAD,	53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
43	REQ_SENDFILE,	54	REQ_SENDFILE,
44	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
45	REQ_FSYNC, REQ_FDATASYNC,	56	REQ_FSYNC, REQ_FDATASYNC,
46	REQ_UNLINK, REQ_RMDIR,	57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
47	REQ_SYMLINK,	58	REQ_READDIR,
		59	REQ_LINK, REQ_SYMLINK,
		60	REQ_SLEEP,
		61	REQ_GROUP,
48	};	62	};
49		63
		64	#define AIO_REQ_KLASS "IO::AIO::REQ"
		65	#define AIO_GRP_KLASS "IO::AIO::GRP"
		66
50	typedef struct aio_cb {	67	typedef struct aio_cb
		68	{
		69	struct aio_cb grp, grp_prev, *grp_next;
		70
51	struct aio_cb *volatile next;	71	struct aio_cb *volatile next;
52		72
53	int type;	73	SV self; / the perl counterpart of this request, if any */
54		74
55	int fd, fd2;	75	SV data, callback;
		76	SV fh, fh2;
		77	void dataptr, data2ptr;
		78	Stat_t *statdata;
56	off_t offset;	79	off_t offset;
57	size_t length;	80	size_t length;
58	ssize_t result;	81	ssize_t result;
		82
		83	int type;
		84	int fd, fd2;
		85	int errorno;
		86	STRLEN dataoffset;
59	mode_t mode; /* open */	87	mode_t mode; /* open */
60	int errorno;	88	unsigned char cancelled;
61	SV data, callback;
62	SV fh, fh2;
63	void dataptr, data2ptr;
64	STRLEN dataoffset;
65
66	Stat_t *statdata;
67	} aio_cb;	89	} aio_cb;
68		90
69	typedef aio_cb *aio_req;	91	typedef aio_cb *aio_req;
		92	typedef aio_cb *aio_req_ornot;
70		93
71	static int started, wanted;	94	static int started, wanted;
72	static volatile int nreqs;	95	static volatile int nreqs;
73	static int max_outstanding = 1<<30;	96	static int max_outstanding = 1<<30;
74	static int respipe [2];	97	static int respipe [2];
…		…
78	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
79		102
80	static volatile aio_req reqs, reqe; /* queue start, queue end */	103	static volatile aio_req reqs, reqe; /* queue start, queue end */
81	static volatile aio_req ress, rese; /* queue start, queue end */	104	static volatile aio_req ress, rese; /* queue start, queue end */
82		105
83	static void free_req (aio_req req)	106	static void req_free (aio_req req);
84	{
85	if (req->data)
86	SvREFCNT_dec (req->data);
87		107
88	if (req->fh)	108	/* must be called at most once */
89	SvREFCNT_dec (req->fh);	109	static SV req_sv (aio_req req, const char klass)
		110	{
		111	req->self = (SV *)newHV ();
		112	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
90		113
91	if (req->fh2)	114	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
92	SvREFCNT_dec (req->fh2);
93
94	if (req->statdata)
95	Safefree (req->statdata);
96
97	if (req->callback)
98	SvREFCNT_dec (req->callback);
99
100	Safefree (req);
101	}	115	}
102		116
103	static void	117	static aio_req SvAIO_REQ (SV *sv)
104	poll_wait ()	118	{
		119	if (!sv_derived_from (sv, AIO_REQ_KLASS) \|\| !SvROK (sv))
		120	croak ("object of class " AIO_REQ_KLASS " expected");
		121
		122	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		123
		124	return mg ? (aio_req)mg->mg_ptr : 0;
		125	}
		126
		127	static void poll_wait ()
105	{	128	{
106	if (nreqs && !ress)	129	if (nreqs && !ress)
107	{	130	{
108	fd_set rfd;	131	fd_set rfd;
109	FD_ZERO(&rfd);	132	FD_ZERO(&rfd);
…		…
111		134
112	select (respipe [0] + 1, &rfd, 0, 0, 0);	135	select (respipe [0] + 1, &rfd, 0, 0, 0);
113	}	136	}
114	}	137	}
115		138
116	static int	139	static void req_invoke (aio_req req)
117	poll_cb ()	140	{
		141	dSP;
		142	int errorno = errno;
		143
		144	if (req->cancelled \|\| !SvOK (req->callback))
		145	return;
		146
		147	errno = req->errorno;
		148
		149	ENTER;
		150	PUSHMARK (SP);
		151	EXTEND (SP, 1);
		152
		153	switch (req->type)
		154	{
		155	case REQ_READDIR:
		156	{
		157	SV *rv = &PL_sv_undef;
		158
		159	if (req->result >= 0)
		160	{
		161	char *buf = req->data2ptr;
		162	AV *av = newAV ();
		163
		164	while (req->result)
		165	{
		166	SV *sv = newSVpv (buf, 0);
		167
		168	av_push (av, sv);
		169	buf += SvCUR (sv) + 1;
		170	req->result--;
		171	}
		172
		173	rv = sv_2mortal (newRV_noinc ((SV *)av));
		174	}
		175
		176	PUSHs (rv);
		177	}
		178	break;
		179
		180	case REQ_OPEN:
		181	{
		182	/* convert fd to fh */
		183	SV *fh;
		184
		185	PUSHs (sv_2mortal (newSViv (req->result)));
		186	PUTBACK;
		187	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		188	SPAGAIN;
		189
		190	fh = SvREFCNT_inc (POPs);
		191
		192	PUSHMARK (SP);
		193	XPUSHs (sv_2mortal (fh));
		194	}
		195	break;
		196
		197	case REQ_GROUP:
		198	if (req->data)
		199	{
		200	int i;
		201	AV av = (AV )req->data;
		202
		203	EXTEND (SP, AvFILL (av) + 1);
		204	for (i = 0; i <= AvFILL (av); ++i)
		205	PUSHs (*av_fetch (av, i, 0));
		206	}
		207	break;
		208
		209	case REQ_SLEEP:
		210	break;
		211
		212	default:
		213	PUSHs (sv_2mortal (newSViv (req->result)));
		214	break;
		215	}
		216
		217
		218	PUTBACK;
		219	call_sv (req->callback, G_VOID \| G_EVAL);
		220	SPAGAIN;
		221
		222	if (SvTRUE (ERRSV))
		223	{
		224	req_free (req);
		225	croak (0);
		226	}
		227
		228	LEAVE;
		229
		230	errno = errorno;
		231	}
		232
		233	static void req_free (aio_req req)
		234	{
		235	if (req->grp)
		236	{
		237	aio_req grp = req->grp;
		238
		239	/* unlink request */
		240	req->grp_next->grp_prev = req->grp_prev;
		241	req->grp_prev->grp_next = req->grp_next;
		242
		243	if (grp->grp_next == grp && grp->fd)
		244	{
		245	req_invoke (grp);
		246	req_free (grp);
		247	}
		248	}
		249
		250	if (req->self)
		251	{
		252	sv_unmagic (req->self, PERL_MAGIC_ext);
		253	SvREFCNT_dec (req->self);
		254	}
		255
		256	if (req->data)
		257	SvREFCNT_dec (req->data);
		258
		259	if (req->fh)
		260	SvREFCNT_dec (req->fh);
		261
		262	if (req->fh2)
		263	SvREFCNT_dec (req->fh2);
		264
		265	if (req->statdata)
		266	Safefree (req->statdata);
		267
		268	if (req->callback)
		269	SvREFCNT_dec (req->callback);
		270
		271	if (req->type == REQ_READDIR && req->result >= 0)
		272	free (req->data2ptr);
		273
		274	Safefree (req);
		275	}
		276
		277	static void req_cancel (aio_req req)
		278	{
		279	req->cancelled = 1;
		280
		281	if (req->type == REQ_GROUP)
		282	{
		283	aio_req sub;
		284
		285	for (sub = req->grp_next; sub != req; sub = sub->grp_next)
		286	req_cancel (sub);
		287	}
		288	}
		289
		290	static int poll_cb ()
118	{	291	{
119	dSP;	292	dSP;
120	int count = 0;	293	int count = 0;
121	int do_croak = 0;	294	int do_croak = 0;
122	aio_req req;	295	aio_req req;
…		…
148		321
149	nreqs--;	322	nreqs--;
150		323
151	if (req->type == REQ_QUIT)	324	if (req->type == REQ_QUIT)
152	started--;	325	started--;
		326	else if (req->type == REQ_GROUP && req->grp_next != req)
		327	{
		328	req->fd = 1; /* mark request as delayed */
		329	continue;
		330	}
153	else	331	else
154	{	332	{
155	int errorno = errno;
156	errno = req->errorno;
157
158	if (req->type == REQ_READ)	333	if (req->type == REQ_READ)
159	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));	334	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
160		335
161	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))	336	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
162	SvREADONLY_off (req->data);	337	SvREADONLY_off (req->data);
…		…
166	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	341	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
167	PL_laststatval = req->result;	342	PL_laststatval = req->result;
168	PL_statcache = *(req->statdata);	343	PL_statcache = *(req->statdata);
169	}	344	}
170		345
171	ENTER;	346	req_invoke (req);
172	PUSHMARK (SP);
173	XPUSHs (sv_2mortal (newSViv (req->result)));
174		347
175	if (req->type == REQ_OPEN)
176	{
177	/* convert fd to fh */
178	SV *fh;
179
180	PUTBACK;
181	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
182	SPAGAIN;
183
184	fh = SvREFCNT_inc (POPs);
185
186	PUSHMARK (SP);
187	XPUSHs (sv_2mortal (fh));
188	}
189
190	if (SvOK (req->callback))
191	{
192	PUTBACK;
193	call_sv (req->callback, G_VOID \| G_EVAL);
194	SPAGAIN;
195
196	if (SvTRUE (ERRSV))
197	{
198	free_req (req);
199	croak (0);
200	}
201	}
202
203	LEAVE;
204
205	errno = errorno;
206	count++;	348	count++;
207	}	349	}
208		350
209	free_req (req);	351	req_free (req);
210	}	352	}
211		353
212	return count;	354	return count;
213	}	355	}
214		356
215	static void aio_proc(void arg);	357	static void aio_proc(void arg);
216		358
217	static void
218	start_thread (void)	359	static void start_thread (void)
219	{	360	{
220	sigset_t fullsigset, oldsigset;	361	sigset_t fullsigset, oldsigset;
221	pthread_t tid;	362	pthread_t tid;
222	pthread_attr_t attr;	363	pthread_attr_t attr;
223		364
…		…
232	started++;	373	started++;
233		374
234	sigprocmask (SIG_SETMASK, &oldsigset, 0);	375	sigprocmask (SIG_SETMASK, &oldsigset, 0);
235	}	376	}
236		377
237	static void	378	static void req_send (aio_req req)
238	send_req (aio_req req)
239	{	379	{
240	while (started < wanted && nreqs >= started)	380	while (started < wanted && nreqs >= started)
241	start_thread ();	381	start_thread ();
242		382
243	nreqs++;	383	nreqs++;
…		…
267		407
268	poll_wait ();	408	poll_wait ();
269	}	409	}
270	}	410	}
271		411
272	static void	412	static void end_thread (void)
273	end_thread (void)
274	{	413	{
275	aio_req req;	414	aio_req req;
276	Newz (0, req, 1, aio_cb);	415	Newz (0, req, 1, aio_cb);
277	req->type = REQ_QUIT;	416	req->type = REQ_QUIT;
278		417
279	send_req (req);	418	req_send (req);
280	}	419	}
281		420
282	static void min_parallel (int nthreads)	421	static void min_parallel (int nthreads)
283	{	422	{
284	if (wanted < nthreads)	423	if (wanted < nthreads)
…		…
313	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	452	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
314	croak ("cannot set result pipe to nonblocking mode");	453	croak ("cannot set result pipe to nonblocking mode");
315		454
316	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	455	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
317	croak ("cannot set result pipe to nonblocking mode");	456	croak ("cannot set result pipe to nonblocking mode");
318	}
319
320	static void atfork_prepare (void)
321	{
322	pthread_mutex_lock (&reqlock);
323	pthread_mutex_lock (&reslock);
324	}
325
326	static void atfork_parent (void)
327	{
328	pthread_mutex_unlock (&reslock);
329	pthread_mutex_unlock (&reqlock);
330	}
331
332	static void atfork_child (void)
333	{
334	aio_req prv;
335
336	started = 0;
337
338	while (reqs)
339	{
340	prv = reqs;
341	reqs = prv->next;
342	free_req (prv);
343	}
344
345	reqs = reqe = 0;
346
347	while (ress)
348	{
349	prv = ress;
350	ress = prv->next;
351	free_req (prv);
352	}
353
354	ress = rese = 0;
355
356	close (respipe [0]);
357	close (respipe [1]);
358	create_pipe ();
359
360	atfork_parent ();
361	}	457	}
362		458
363	/*****************************************************************************/	459	/*****************************************************************************/
364	/* work around various missing functions */	460	/* work around various missing functions */
365		461
…		…
370	/*	466	/*
371	* make our pread/pwrite safe against themselves, but not against	467	* make our pread/pwrite safe against themselves, but not against
372	* normal read/write by using a mutex. slows down execution a lot,	468	* normal read/write by using a mutex. slows down execution a lot,
373	* but that's your problem, not mine.	469	* but that's your problem, not mine.
374	*/	470	*/
375	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	471	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
376		472
377	static ssize_t	473	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
378	pread (int fd, void *buf, size_t count, off_t offset)
379	{	474	{
380	ssize_t res;	475	ssize_t res;
381	off_t ooffset;	476	off_t ooffset;
382		477
383	pthread_mutex_lock (&iolock);	478	pthread_mutex_lock (&preadwritelock);
384	ooffset = lseek (fd, 0, SEEK_CUR);	479	ooffset = lseek (fd, 0, SEEK_CUR);
385	lseek (fd, offset, SEEK_SET);	480	lseek (fd, offset, SEEK_SET);
386	res = read (fd, buf, count);	481	res = read (fd, buf, count);
387	lseek (fd, ooffset, SEEK_SET);	482	lseek (fd, ooffset, SEEK_SET);
388	pthread_mutex_unlock (&iolock);	483	pthread_mutex_unlock (&preadwritelock);
389		484
390	return res;	485	return res;
391	}	486	}
392		487
393	static ssize_t
394	pwrite (int fd, void *buf, size_t count, off_t offset)	488	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
395	{	489	{
396	ssize_t res;	490	ssize_t res;
397	off_t ooffset;	491	off_t ooffset;
398		492
399	pthread_mutex_lock (&iolock);	493	pthread_mutex_lock (&preadwritelock);
400	ooffset = lseek (fd, 0, SEEK_CUR);	494	ooffset = lseek (fd, 0, SEEK_CUR);
401	lseek (fd, offset, SEEK_SET);	495	lseek (fd, offset, SEEK_SET);
402	res = write (fd, buf, count);	496	res = write (fd, buf, count);
403	lseek (fd, offset, SEEK_SET);	497	lseek (fd, offset, SEEK_SET);
404	pthread_mutex_unlock (&iolock);	498	pthread_mutex_unlock (&preadwritelock);
405		499
406	return res;	500	return res;
407	}	501	}
408	#endif	502	#endif
409		503
…		…
412	#endif	506	#endif
413		507
414	#if !HAVE_READAHEAD	508	#if !HAVE_READAHEAD
415	# define readahead aio_readahead	509	# define readahead aio_readahead
416		510
		511	static ssize_t readahead (int fd, off_t offset, size_t count)
		512	{
417	static char readahead_buf[4096];	513	char readahead_buf[4096];
418		514
419	static ssize_t
420	readahead (int fd, off_t offset, size_t count)
421	{
422	while (count > 0)	515	while (count > 0)
423	{	516	{
424	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	517	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
425		518
426	pread (fd, readahead_buf, len, offset);	519	pread (fd, readahead_buf, len, offset);
…		…
430		523
431	errno = 0;	524	errno = 0;
432	}	525	}
433	#endif	526	#endif
434		527
		528	#if !HAVE_READDIR_R
		529	# define readdir_r aio_readdir_r
		530
		531	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		532
		533	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
		534	{
		535	struct dirent *e;
		536	int errorno;
		537
		538	pthread_mutex_lock (&readdirlock);
		539
		540	e = readdir (dirp);
		541	errorno = errno;
		542
		543	if (e)
		544	{
		545	*res = ent;
		546	strcpy (ent->d_name, e->d_name);
		547	}
		548	else
		549	*res = 0;
		550
		551	pthread_mutex_unlock (&readdirlock);
		552
		553	errno = errorno;
		554	return e ? 0 : -1;
		555	}
		556	#endif
		557
435	/* sendfile always needs emulation */	558	/* sendfile always needs emulation */
436	static ssize_t
437	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	559	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
438	{	560	{
439	ssize_t res;	561	ssize_t res;
440		562
441	if (!count)	563	if (!count)
442	return 0;	564	return 0;
443		565
		566	#if HAVE_SENDFILE
444	#if __linux	567	# if __linux
445	res = sendfile (ofd, ifd, &offset, count);	568	res = sendfile (ofd, ifd, &offset, count);
446		569
447	#elif __freebsd	570	# elif __freebsd
448	/*	571	/*
449	* Of course, the freebsd sendfile is a dire hack with no thoughts	572	* Of course, the freebsd sendfile is a dire hack with no thoughts
450	* wasted on making it similar to other i/o functions.	573	* wasted on making it similar to other I/O functions.
451	*/	574	*/
452	{	575	{
453	off_t sbytes;	576	off_t sbytes;
454	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	577	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
455		578
456	if (!res && errno == EAGAIN)	579	if (res < 0 && sbytes)
457	/* maybe on others, too, as usual, the manpage leaves you guessing */	580	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
458	res = sbytes;	581	res = sbytes;
459	}	582	}
460		583
461	#elif __hpux	584	# elif __hpux
462	res = sendfile (ofd, ifd, offset, count, 0, 0);	585	res = sendfile (ofd, ifd, offset, count, 0, 0);
463		586
		587	# elif __solaris
		588	{
		589	struct sendfilevec vec;
		590	size_t sbytes;
		591
		592	vec.sfv_fd = ifd;
		593	vec.sfv_flag = 0;
		594	vec.sfv_off = offset;
		595	vec.sfv_len = count;
		596
		597	res = sendfilev (ofd, &vec, 1, &sbytes);
		598
		599	if (res < 0 && sbytes)
		600	res = sbytes;
		601	}
		602
		603	# endif
464	#else	604	#else
465	res = -1;	605	res = -1;
466	errno = ENOSYS;	606	errno = ENOSYS;
467	#endif	607	#endif
468		608
		609	if (res < 0
469	if (res < 0 && (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK))	610	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK
		611	#if __solaris
		612	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE
		613	#endif
		614	)
		615	)
470	{	616	{
471	/* emulate sendfile. this is a major pain in the ass */	617	/* emulate sendfile. this is a major pain in the ass */
472	char *buf = malloc (4096);	618	char buf[4096];
473	res = 0;	619	res = 0;
474		620
475	for (;;)	621	while (count)
476	{	622	{
477	ssize_t cnt;	623	ssize_t cnt;
478		624
479	cnt = pread (ifd, buf, 4096, offset);	625	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
480		626
481	if (cnt <= 0)	627	if (cnt <= 0)
482	{	628	{
483	if (cnt && !res) res = -1;	629	if (cnt && !res) res = -1;
484	break;	630	break;
485	}	631	}
486		632
487	cnt = write (ofd, buf, cnt);	633	cnt = write (ofd, buf, cnt);
488		634
489	if (cnt <= 0)	635	if (cnt <= 0)
490	{	636	{
491	if (cnt && !res) res = -1;	637	if (cnt && !res) res = -1;
492	break;	638	break;
493	}	639	}
494		640
495	offset += cnt;	641	offset += cnt;
496	res += cnt;	642	res += cnt;
		643	count -= cnt;
497	}	644	}
498
499	{
500	int errorno = errno;
501	free (buf);
502	errno = errorno;
503	}
504	}	645	}
505		646
506	return res;	647	return res;
		648	}
		649
		650	/* read a full directory */
		651	static int scandir_ (const char path, void *namesp)
		652	{
		653	DIR *dirp = opendir (path);
		654	union
		655	{
		656	struct dirent d;
		657	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		658	} u;
		659	struct dirent *entp;
		660	char name, names;
		661	int memlen = 4096;
		662	int memofs = 0;
		663	int res = 0;
		664	int errorno;
		665
		666	if (!dirp)
		667	return -1;
		668
		669	names = malloc (memlen);
		670
		671	for (;;)
		672	{
		673	errno = 0, readdir_r (dirp, &u.d, &entp);
		674
		675	if (!entp)
		676	break;
		677
		678	name = entp->d_name;
		679
		680	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
		681	{
		682	int len = strlen (name) + 1;
		683
		684	res++;
		685
		686	while (memofs + len > memlen)
		687	{
		688	memlen *= 2;
		689	names = realloc (names, memlen);
		690	if (!names)
		691	break;
		692	}
		693
		694	memcpy (names + memofs, name, len);
		695	memofs += len;
		696	}
		697	}
		698
		699	errorno = errno;
		700	closedir (dirp);
		701
		702	if (errorno)
		703	{
		704	free (names);
		705	errno = errorno;
		706	res = -1;
		707	}
		708
		709	namesp = (void )names;
		710	return res;
507	}	711	}
508		712
509	/*****************************************************************************/	713	/*****************************************************************************/
510		714
511	static void *
512	aio_proc (void *thr_arg)	715	static void aio_proc (void thr_arg)
513	{	716	{
514	aio_req req;	717	aio_req req;
515	int type;	718	int type;
516		719
517	do	720	do
…		…
536		739
537	pthread_mutex_unlock (&reqlock);	740	pthread_mutex_unlock (&reqlock);
538		741
539	errno = 0; /* strictly unnecessary */	742	errno = 0; /* strictly unnecessary */
540		743
541	type = req->type;	744	if (!req->cancelled)
542
543	switch (type)	745	switch (req->type)
544	{	746	{
545	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	747	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
546	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	748	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
547		749
548	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	750	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
549	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	751	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
550		752
551	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	753	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
552	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	754	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
553	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	755	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
554		756
555	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	757	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
556	case REQ_CLOSE: req->result = close (req->fd); break;	758	case REQ_CLOSE: req->result = close (req->fd); break;
557	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	759	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
558	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	760	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		761	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		762	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
559	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	763	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
560		764
561	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	765	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
562	case REQ_FSYNC: req->result = fsync (req->fd); break;	766	case REQ_FSYNC: req->result = fsync (req->fd); break;
		767	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
563		768
		769	case REQ_SLEEP:
		770	{
		771	struct timeval tv;
		772
		773	tv.tv_sec = req->fd;
		774	tv.tv_usec = req->fd2;
		775
		776	req->result = select (0, 0, 0, 0, &tv);
		777	}
		778
564	case REQ_QUIT:	779	case REQ_QUIT:
565	break;	780	break;
566		781
567	default:	782	default:
568	req->result = ENOSYS;	783	req->result = ENOSYS;
569	break;	784	break;
570	}	785	}
571		786
572	req->errorno = errno;	787	req->errorno = errno;
573		788
574	pthread_mutex_lock (&reslock);	789	pthread_mutex_lock (&reslock);
575		790
…		…
593	while (type != REQ_QUIT);	808	while (type != REQ_QUIT);
594		809
595	return 0;	810	return 0;
596	}	811	}
597		812
		813	/*****************************************************************************/
		814
		815	static void atfork_prepare (void)
		816	{
		817	pthread_mutex_lock (&reqlock);
		818	pthread_mutex_lock (&reslock);
		819	#if !HAVE_PREADWRITE
		820	pthread_mutex_lock (&preadwritelock);
		821	#endif
		822	#if !HAVE_READDIR_R
		823	pthread_mutex_lock (&readdirlock);
		824	#endif
		825	}
		826
		827	static void atfork_parent (void)
		828	{
		829	#if !HAVE_READDIR_R
		830	pthread_mutex_unlock (&readdirlock);
		831	#endif
		832	#if !HAVE_PREADWRITE
		833	pthread_mutex_unlock (&preadwritelock);
		834	#endif
		835	pthread_mutex_unlock (&reslock);
		836	pthread_mutex_unlock (&reqlock);
		837	}
		838
		839	static void atfork_child (void)
		840	{
		841	aio_req prv;
		842
		843	started = 0;
		844
		845	while (reqs)
		846	{
		847	prv = reqs;
		848	reqs = prv->next;
		849	req_free (prv);
		850	}
		851
		852	reqs = reqe = 0;
		853
		854	while (ress)
		855	{
		856	prv = ress;
		857	ress = prv->next;
		858	req_free (prv);
		859	}
		860
		861	ress = rese = 0;
		862
		863	close (respipe [0]);
		864	close (respipe [1]);
		865	create_pipe ();
		866
		867	atfork_parent ();
		868	}
		869
598	#define dREQ \	870	#define dREQ \
599	aio_req req; \	871	aio_req req; \
600	\	872	\
601	if (SvOK (callback) && !SvROK (callback)) \	873	if (SvOK (callback) && !SvROK (callback)) \
602	croak ("clalback must be undef or of reference type"); \	874	croak ("callback must be undef or of reference type"); \
603	\	875	\
604	Newz (0, req, 1, aio_cb); \	876	Newz (0, req, 1, aio_cb); \
605	if (!req) \	877	if (!req) \
606	croak ("out of memory during aio_req allocation"); \	878	croak ("out of memory during aio_req allocation"); \
607	\	879	\
608	req->callback = newSVsv (callback);	880	req->callback = newSVsv (callback)
		881
		882	#define REQ_SEND \
		883	req_send (req); \
		884	\
		885	if (GIMME_V != G_VOID) \
		886	XPUSHs (req_sv (req, AIO_REQ_KLASS));
609		887
610	MODULE = IO::AIO PACKAGE = IO::AIO	888	MODULE = IO::AIO PACKAGE = IO::AIO
611		889
612	PROTOTYPES: ENABLE	890	PROTOTYPES: ENABLE
613		891
614	BOOT:	892	BOOT:
615	{	893	{
		894	HV *stash = gv_stashpv ("IO::AIO", 1);
		895	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		896	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		897	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		898
616	create_pipe ();	899	create_pipe ();
617	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	900	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
618	}	901	}
619		902
620	void	903	void
621	min_parallel(nthreads)	904	min_parallel (nthreads)
622	int nthreads	905	int nthreads
623	PROTOTYPE: $	906	PROTOTYPE: $
624		907
625	void	908	void
626	max_parallel(nthreads)	909	max_parallel (nthreads)
627	int nthreads	910	int nthreads
628	PROTOTYPE: $	911	PROTOTYPE: $
629		912
630	int	913	int
631	max_outstanding(nreqs)	914	max_outstanding (nreqs)
632	int nreqs	915	int nreqs
633	PROTOTYPE: $	916	PROTOTYPE: $
634	CODE:	917	CODE:
635	RETVAL = max_outstanding;	918	RETVAL = max_outstanding;
636	max_outstanding = nreqs;	919	max_outstanding = nreqs;
637		920
638	void	921	void
639	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	922	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
640	SV * pathname	923	SV * pathname
641	int flags	924	int flags
642	int mode	925	int mode
643	SV * callback	926	SV * callback
644	PROTOTYPE: $$$;$	927	PROTOTYPE: $$$;$
645	CODE:	928	PPCODE:
646	{	929	{
647	dREQ;	930	dREQ;
648		931
649	req->type = REQ_OPEN;	932	req->type = REQ_OPEN;
650	req->data = newSVsv (pathname);	933	req->data = newSVsv (pathname);
651	req->dataptr = SvPVbyte_nolen (req->data);	934	req->dataptr = SvPVbyte_nolen (req->data);
652	req->fd = flags;	935	req->fd = flags;
653	req->mode = mode;	936	req->mode = mode;
654		937
655	send_req (req);	938	REQ_SEND;
656	}	939	}
657		940
658	void	941	void
659	aio_close(fh,callback=&PL_sv_undef)	942	aio_close (fh,callback=&PL_sv_undef)
660	SV * fh	943	SV * fh
661	SV * callback	944	SV * callback
662	PROTOTYPE: $;$	945	PROTOTYPE: $;$
663	ALIAS:	946	ALIAS:
664	aio_close = REQ_CLOSE	947	aio_close = REQ_CLOSE
665	aio_fsync = REQ_FSYNC	948	aio_fsync = REQ_FSYNC
666	aio_fdatasync = REQ_FDATASYNC	949	aio_fdatasync = REQ_FDATASYNC
667	CODE:	950	PPCODE:
668	{	951	{
669	dREQ;	952	dREQ;
670		953
671	req->type = ix;	954	req->type = ix;
672	req->fh = newSVsv (fh);	955	req->fh = newSVsv (fh);
673	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	956	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
674		957
675	send_req (req);	958	REQ_SEND (req);
676	}	959	}
677		960
678	void	961	void
679	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	962	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
680	SV * fh	963	SV * fh
681	UV offset	964	UV offset
682	UV length	965	UV length
683	SV * data	966	SV * data
684	UV dataoffset	967	UV dataoffset
685	SV * callback	968	SV * callback
686	ALIAS:	969	ALIAS:
687	aio_read = REQ_READ	970	aio_read = REQ_READ
688	aio_write = REQ_WRITE	971	aio_write = REQ_WRITE
689	PROTOTYPE: $$$$$;$	972	PROTOTYPE: $$$$$;$
690	CODE:	973	PPCODE:
691	{	974	{
692	aio_req req;	975	aio_req req;
693	STRLEN svlen;	976	STRLEN svlen;
694	char *svptr = SvPVbyte (data, svlen);	977	char *svptr = SvPVbyte (data, svlen);
695		978
…		…
733	{	1016	{
734	SvREADONLY_on (data);	1017	SvREADONLY_on (data);
735	req->data2ptr = (void *)data;	1018	req->data2ptr = (void *)data;
736	}	1019	}
737		1020
738	send_req (req);	1021	REQ_SEND;
739	}	1022	}
740	}	1023	}
741		1024
742	void	1025	void
743	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1026	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
744	SV * out_fh	1027	SV * out_fh
745	SV * in_fh	1028	SV * in_fh
746	UV in_offset	1029	UV in_offset
747	UV length	1030	UV length
748	SV * callback	1031	SV * callback
749	PROTOTYPE: $$$$;$	1032	PROTOTYPE: $$$$;$
750	CODE:	1033	PPCODE:
751	{	1034	{
752	dREQ;	1035	dREQ;
753		1036
754	req->type = REQ_SENDFILE;	1037	req->type = REQ_SENDFILE;
755	req->fh = newSVsv (out_fh);	1038	req->fh = newSVsv (out_fh);
…		…
757	req->fh2 = newSVsv (in_fh);	1040	req->fh2 = newSVsv (in_fh);
758	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1041	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
759	req->offset = in_offset;	1042	req->offset = in_offset;
760	req->length = length;	1043	req->length = length;
761		1044
762	send_req (req);	1045	REQ_SEND;
763	}	1046	}
764		1047
765	void	1048	void
766	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1049	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
767	SV * fh	1050	SV * fh
768	UV offset	1051	UV offset
769	IV length	1052	IV length
770	SV * callback	1053	SV * callback
771	PROTOTYPE: $$$;$	1054	PROTOTYPE: $$$;$
772	CODE:	1055	PPCODE:
773	{	1056	{
774	dREQ;	1057	dREQ;
775		1058
776	req->type = REQ_READAHEAD;	1059	req->type = REQ_READAHEAD;
777	req->fh = newSVsv (fh);	1060	req->fh = newSVsv (fh);
778	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1061	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
779	req->offset = offset;	1062	req->offset = offset;
780	req->length = length;	1063	req->length = length;
781		1064
782	send_req (req);	1065	REQ_SEND;
783	}	1066	}
784		1067
785	void	1068	void
786	aio_stat(fh_or_path,callback=&PL_sv_undef)	1069	aio_stat (fh_or_path,callback=&PL_sv_undef)
787	SV * fh_or_path	1070	SV * fh_or_path
788	SV * callback	1071	SV * callback
789	ALIAS:	1072	ALIAS:
790	aio_stat = REQ_STAT	1073	aio_stat = REQ_STAT
791	aio_lstat = REQ_LSTAT	1074	aio_lstat = REQ_LSTAT
792	CODE:	1075	PPCODE:
793	{	1076	{
794	dREQ;	1077	dREQ;
795		1078
796	New (0, req->statdata, 1, Stat_t);	1079	New (0, req->statdata, 1, Stat_t);
797	if (!req->statdata)	1080	if (!req->statdata)
798	{	1081	{
799	free_req (req);	1082	req_free (req);
800	croak ("out of memory during aio_req->statdata allocation");	1083	croak ("out of memory during aio_req->statdata allocation");
801	}	1084	}
802		1085
803	if (SvPOK (fh_or_path))	1086	if (SvPOK (fh_or_path))
804	{	1087	{
…		…
811	req->type = REQ_FSTAT;	1094	req->type = REQ_FSTAT;
812	req->fh = newSVsv (fh_or_path);	1095	req->fh = newSVsv (fh_or_path);
813	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1096	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
814	}	1097	}
815		1098
816	send_req (req);	1099	REQ_SEND;
817	}	1100	}
818		1101
819	void	1102	void
820	aio_unlink(pathname,callback=&PL_sv_undef)	1103	aio_unlink (pathname,callback=&PL_sv_undef)
821	SV * pathname	1104	SV * pathname
822	SV * callback	1105	SV * callback
823	ALIAS:	1106	ALIAS:
824	aio_unlink = REQ_UNLINK	1107	aio_unlink = REQ_UNLINK
825	aio_rmdir = REQ_RMDIR	1108	aio_rmdir = REQ_RMDIR
		1109	aio_readdir = REQ_READDIR
826	CODE:	1110	PPCODE:
827	{	1111	{
828	dREQ;	1112	dREQ;
829		1113
830	req->type = ix;	1114	req->type = ix;
831	req->data = newSVsv (pathname);	1115	req->data = newSVsv (pathname);
832	req->dataptr = SvPVbyte_nolen (req->data);	1116	req->dataptr = SvPVbyte_nolen (req->data);
833		1117
834	send_req (req);	1118	REQ_SEND;
835	}	1119	}
836		1120
837	void	1121	void
838	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1122	aio_link (oldpath,newpath,callback=&PL_sv_undef)
839	SV * oldpath	1123	SV * oldpath
840	SV * newpath	1124	SV * newpath
841	SV * callback	1125	SV * callback
		1126	ALIAS:
		1127	aio_link = REQ_LINK
		1128	aio_symlink = REQ_SYMLINK
		1129	aio_rename = REQ_RENAME
842	CODE:	1130	PPCODE:
843	{	1131	{
844	dREQ;	1132	dREQ;
845		1133
846	req->type = REQ_SYMLINK;	1134	req->type = ix;
847	req->fh = newSVsv (oldpath);	1135	req->fh = newSVsv (oldpath);
848	req->data2ptr = SvPVbyte_nolen (req->fh);	1136	req->data2ptr = SvPVbyte_nolen (req->fh);
849	req->data = newSVsv (newpath);	1137	req->data = newSVsv (newpath);
850	req->dataptr = SvPVbyte_nolen (req->data);	1138	req->dataptr = SvPVbyte_nolen (req->data);
851		1139
852	send_req (req);	1140	REQ_SEND;
853	}	1141	}
854		1142
855	void	1143	void
		1144	aio_sleep (delay,callback=&PL_sv_undef)
		1145	double delay
		1146	SV * callback
		1147	PPCODE:
		1148	{
		1149	dREQ;
		1150
		1151	req->type = REQ_SLEEP;
		1152	req->fd = delay < 0. ? 0 : delay;
		1153	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1154
		1155	REQ_SEND;
		1156	}
		1157
		1158	void
		1159	aio_group (callback=&PL_sv_undef)
		1160	SV * callback
		1161	PROTOTYPE: ;$
		1162	PPCODE:
		1163	{
		1164	dREQ;
		1165	req->type = REQ_GROUP;
		1166	req->grp_next = req;
		1167	req->grp_prev = req;
		1168
		1169	req_send (req);
		1170	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1171	}
		1172
		1173	void
856	flush()	1174	flush ()
857	PROTOTYPE:	1175	PROTOTYPE:
858	CODE:	1176	CODE:
859	while (nreqs)	1177	while (nreqs)
860	{	1178	{
861	poll_wait ();	1179	poll_wait ();
…		…
901	CODE:	1219	CODE:
902	RETVAL = nreqs;	1220	RETVAL = nreqs;
903	OUTPUT:	1221	OUTPUT:
904	RETVAL	1222	RETVAL
905		1223
		1224	PROTOTYPES: DISABLE
		1225
		1226	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1227
		1228	void
		1229	cancel (aio_req_ornot req)
		1230	PROTOTYPE:
		1231	CODE:
		1232	req_cancel (req);
		1233
		1234	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1235
		1236	void
		1237	add (aio_req grp, ...)
		1238	PPCODE:
		1239	{
		1240	int i;
		1241
		1242	for (i = 1; i < items; ++i )
		1243	{
		1244	if (GIMME_V != G_VOID)
		1245	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1246
		1247	aio_req req = SvAIO_REQ (ST (i));
		1248
		1249	if (req)
		1250	{
		1251	req->grp_prev = grp;
		1252	req->grp_next = grp->grp_next;
		1253	grp->grp_next->grp_prev = req;
		1254	grp->grp_next = req;
		1255
		1256	req->grp = grp;
		1257	}
		1258	}
		1259	}
		1260
		1261	void
		1262	result (aio_req grp, ...)
		1263	CODE:
		1264	{
		1265	int i;
		1266	AV *av = newAV ();
		1267
		1268	if (grp->data)
		1269	SvREFCNT_dec (grp->data);
		1270
		1271	for (i = 1; i < items; ++i )
		1272	av_push (av, newSVsv (ST (i)));
		1273
		1274	grp->data = (SV *)av;
		1275	}
		1276

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.34 by root, Tue Aug 23 00:03:14 2005 UTC vs. Revision 1.48 by root, Sun Oct 22 10:33:19 2006 UTC

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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.34 by root, Tue Aug 23 00:03:14 2005 UTC vs.
Revision 1.48 by root, Sun Oct 22 10:33:19 2006 UTC