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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.36 by root, Tue Aug 23 01:18:04 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
…		…
30	# else	34	# else
31	# error sendfile support requested but not available	35	# error sendfile support requested but not available
32	# endif	36	# endif
33	#endif	37	#endif
34		38
		39	/* used for struct dirent, AIX doesn't provide it */
		40	#ifndef NAME_MAX
		41	# define NAME_MAX 4096
		42	#endif
		43
35	#if __ia64	44	#if __ia64
36	# define STACKSIZE 65536	45	# define STACKSIZE 65536
37	#else	46	#else
38	# define STACKSIZE 4096	47	# define STACKSIZE 8192
39	#endif	48	#endif
40		49
41	enum {	50	enum {
42	REQ_QUIT,	51	REQ_QUIT,
43	REQ_OPEN, REQ_CLOSE,	52	REQ_OPEN, REQ_CLOSE,
44	REQ_READ, REQ_WRITE, REQ_READAHEAD,	53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
45	REQ_SENDFILE,	54	REQ_SENDFILE,
46	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
47	REQ_FSYNC, REQ_FDATASYNC,	56	REQ_FSYNC, REQ_FDATASYNC,
48	REQ_UNLINK, REQ_RMDIR,	57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
49	REQ_SYMLINK,	58	REQ_READDIR,
		59	REQ_LINK, REQ_SYMLINK,
		60	REQ_SLEEP,
		61	REQ_GROUP,
50	};	62	};
51		63
		64	#define AIO_REQ_KLASS "IO::AIO::REQ"
		65	#define AIO_GRP_KLASS "IO::AIO::GRP"
		66
52	typedef struct aio_cb {	67	typedef struct aio_cb
		68	{
		69	struct aio_cb grp, grp_prev, *grp_next;
		70
53	struct aio_cb *volatile next;	71	struct aio_cb *volatile next;
54		72
55	int type;	73	SV self; / the perl counterpart of this request, if any */
56		74
57	int fd, fd2;	75	SV data, callback;
		76	SV fh, fh2;
		77	void dataptr, data2ptr;
		78	Stat_t *statdata;
58	off_t offset;	79	off_t offset;
59	size_t length;	80	size_t length;
60	ssize_t result;	81	ssize_t result;
		82
		83	int type;
		84	int fd, fd2;
		85	int errorno;
		86	STRLEN dataoffset;
61	mode_t mode; /* open */	87	mode_t mode; /* open */
62	int errorno;	88	unsigned char cancelled;
63	SV data, callback;
64	SV fh, fh2;
65	void dataptr, data2ptr;
66	STRLEN dataoffset;
67
68	Stat_t *statdata;
69	} aio_cb;	89	} aio_cb;
70		90
71	typedef aio_cb *aio_req;	91	typedef aio_cb *aio_req;
		92	typedef aio_cb *aio_req_ornot;
72		93
73	static int started, wanted;	94	static int started, wanted;
74	static volatile int nreqs;	95	static volatile int nreqs;
75	static int max_outstanding = 1<<30;	96	static int max_outstanding = 1<<30;
76	static int respipe [2];	97	static int respipe [2];
…		…
80	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
81		102
82	static volatile aio_req reqs, reqe; /* queue start, queue end */	103	static volatile aio_req reqs, reqe; /* queue start, queue end */
83	static volatile aio_req ress, rese; /* queue start, queue end */	104	static volatile aio_req ress, rese; /* queue start, queue end */
84		105
85	static void free_req (aio_req req)	106	static void req_free (aio_req req);
86	{
87	if (req->data)
88	SvREFCNT_dec (req->data);
89		107
90	if (req->fh)	108	/* must be called at most once */
91	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);
92		113
93	if (req->fh2)	114	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
94	SvREFCNT_dec (req->fh2);
95
96	if (req->statdata)
97	Safefree (req->statdata);
98
99	if (req->callback)
100	SvREFCNT_dec (req->callback);
101
102	Safefree (req);
103	}	115	}
104		116
105	static void	117	static aio_req SvAIO_REQ (SV *sv)
106	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 ()
107	{	128	{
108	if (nreqs && !ress)	129	if (nreqs && !ress)
109	{	130	{
110	fd_set rfd;	131	fd_set rfd;
111	FD_ZERO(&rfd);	132	FD_ZERO(&rfd);
…		…
113		134
114	select (respipe [0] + 1, &rfd, 0, 0, 0);	135	select (respipe [0] + 1, &rfd, 0, 0, 0);
115	}	136	}
116	}	137	}
117		138
118	static int	139	static void req_invoke (aio_req req)
119	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 ()
120	{	291	{
121	dSP;	292	dSP;
122	int count = 0;	293	int count = 0;
123	int do_croak = 0;	294	int do_croak = 0;
124	aio_req req;	295	aio_req req;
…		…
150		321
151	nreqs--;	322	nreqs--;
152		323
153	if (req->type == REQ_QUIT)	324	if (req->type == REQ_QUIT)
154	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	}
155	else	331	else
156	{	332	{
157	int errorno = errno;
158	errno = req->errorno;
159
160	if (req->type == REQ_READ)	333	if (req->type == REQ_READ)
161	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));
162		335
163	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))	336	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
164	SvREADONLY_off (req->data);	337	SvREADONLY_off (req->data);
…		…
168	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	341	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
169	PL_laststatval = req->result;	342	PL_laststatval = req->result;
170	PL_statcache = *(req->statdata);	343	PL_statcache = *(req->statdata);
171	}	344	}
172		345
173	ENTER;	346	req_invoke (req);
174	PUSHMARK (SP);
175	XPUSHs (sv_2mortal (newSViv (req->result)));
176		347
177	if (req->type == REQ_OPEN)
178	{
179	/* convert fd to fh */
180	SV *fh;
181
182	PUTBACK;
183	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
184	SPAGAIN;
185
186	fh = SvREFCNT_inc (POPs);
187
188	PUSHMARK (SP);
189	XPUSHs (sv_2mortal (fh));
190	}
191
192	if (SvOK (req->callback))
193	{
194	PUTBACK;
195	call_sv (req->callback, G_VOID \| G_EVAL);
196	SPAGAIN;
197
198	if (SvTRUE (ERRSV))
199	{
200	free_req (req);
201	croak (0);
202	}
203	}
204
205	LEAVE;
206
207	errno = errorno;
208	count++;	348	count++;
209	}	349	}
210		350
211	free_req (req);	351	req_free (req);
212	}	352	}
213		353
214	return count;	354	return count;
215	}	355	}
216		356
217	static void aio_proc(void arg);	357	static void aio_proc(void arg);
218		358
219	static void
220	start_thread (void)	359	static void start_thread (void)
221	{	360	{
222	sigset_t fullsigset, oldsigset;	361	sigset_t fullsigset, oldsigset;
223	pthread_t tid;	362	pthread_t tid;
224	pthread_attr_t attr;	363	pthread_attr_t attr;
225		364
…		…
234	started++;	373	started++;
235		374
236	sigprocmask (SIG_SETMASK, &oldsigset, 0);	375	sigprocmask (SIG_SETMASK, &oldsigset, 0);
237	}	376	}
238		377
239	static void	378	static void req_send (aio_req req)
240	send_req (aio_req req)
241	{	379	{
242	while (started < wanted && nreqs >= started)	380	while (started < wanted && nreqs >= started)
243	start_thread ();	381	start_thread ();
244		382
245	nreqs++;	383	nreqs++;
…		…
269		407
270	poll_wait ();	408	poll_wait ();
271	}	409	}
272	}	410	}
273		411
274	static void	412	static void end_thread (void)
275	end_thread (void)
276	{	413	{
277	aio_req req;	414	aio_req req;
278	Newz (0, req, 1, aio_cb);	415	Newz (0, req, 1, aio_cb);
279	req->type = REQ_QUIT;	416	req->type = REQ_QUIT;
280		417
281	send_req (req);	418	req_send (req);
282	}	419	}
283		420
284	static void min_parallel (int nthreads)	421	static void min_parallel (int nthreads)
285	{	422	{
286	if (wanted < nthreads)	423	if (wanted < nthreads)
…		…
315	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	452	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
316	croak ("cannot set result pipe to nonblocking mode");	453	croak ("cannot set result pipe to nonblocking mode");
317		454
318	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	455	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
319	croak ("cannot set result pipe to nonblocking mode");	456	croak ("cannot set result pipe to nonblocking mode");
320	}
321
322	static void atfork_prepare (void)
323	{
324	pthread_mutex_lock (&reqlock);
325	pthread_mutex_lock (&reslock);
326	}
327
328	static void atfork_parent (void)
329	{
330	pthread_mutex_unlock (&reslock);
331	pthread_mutex_unlock (&reqlock);
332	}
333
334	static void atfork_child (void)
335	{
336	aio_req prv;
337
338	started = 0;
339
340	while (reqs)
341	{
342	prv = reqs;
343	reqs = prv->next;
344	free_req (prv);
345	}
346
347	reqs = reqe = 0;
348
349	while (ress)
350	{
351	prv = ress;
352	ress = prv->next;
353	free_req (prv);
354	}
355
356	ress = rese = 0;
357
358	close (respipe [0]);
359	close (respipe [1]);
360	create_pipe ();
361
362	atfork_parent ();
363	}	457	}
364		458
365	/*****************************************************************************/	459	/*****************************************************************************/
366	/* work around various missing functions */	460	/* work around various missing functions */
367		461
…		…
372	/*	466	/*
373	* make our pread/pwrite safe against themselves, but not against	467	* make our pread/pwrite safe against themselves, but not against
374	* 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,
375	* but that's your problem, not mine.	469	* but that's your problem, not mine.
376	*/	470	*/
377	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	471	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
378		472
379	static ssize_t	473	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
380	pread (int fd, void *buf, size_t count, off_t offset)
381	{	474	{
382	ssize_t res;	475	ssize_t res;
383	off_t ooffset;	476	off_t ooffset;
384		477
385	pthread_mutex_lock (&iolock);	478	pthread_mutex_lock (&preadwritelock);
386	ooffset = lseek (fd, 0, SEEK_CUR);	479	ooffset = lseek (fd, 0, SEEK_CUR);
387	lseek (fd, offset, SEEK_SET);	480	lseek (fd, offset, SEEK_SET);
388	res = read (fd, buf, count);	481	res = read (fd, buf, count);
389	lseek (fd, ooffset, SEEK_SET);	482	lseek (fd, ooffset, SEEK_SET);
390	pthread_mutex_unlock (&iolock);	483	pthread_mutex_unlock (&preadwritelock);
391		484
392	return res;	485	return res;
393	}	486	}
394		487
395	static ssize_t
396	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)
397	{	489	{
398	ssize_t res;	490	ssize_t res;
399	off_t ooffset;	491	off_t ooffset;
400		492
401	pthread_mutex_lock (&iolock);	493	pthread_mutex_lock (&preadwritelock);
402	ooffset = lseek (fd, 0, SEEK_CUR);	494	ooffset = lseek (fd, 0, SEEK_CUR);
403	lseek (fd, offset, SEEK_SET);	495	lseek (fd, offset, SEEK_SET);
404	res = write (fd, buf, count);	496	res = write (fd, buf, count);
405	lseek (fd, offset, SEEK_SET);	497	lseek (fd, offset, SEEK_SET);
406	pthread_mutex_unlock (&iolock);	498	pthread_mutex_unlock (&preadwritelock);
407		499
408	return res;	500	return res;
409	}	501	}
410	#endif	502	#endif
411		503
…		…
414	#endif	506	#endif
415		507
416	#if !HAVE_READAHEAD	508	#if !HAVE_READAHEAD
417	# define readahead aio_readahead	509	# define readahead aio_readahead
418		510
		511	static ssize_t readahead (int fd, off_t offset, size_t count)
		512	{
419	static char readahead_buf[4096];	513	char readahead_buf[4096];
420		514
421	static ssize_t
422	readahead (int fd, off_t offset, size_t count)
423	{
424	while (count > 0)	515	while (count > 0)
425	{	516	{
426	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	517	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
427		518
428	pread (fd, readahead_buf, len, offset);	519	pread (fd, readahead_buf, len, offset);
…		…
432		523
433	errno = 0;	524	errno = 0;
434	}	525	}
435	#endif	526	#endif
436		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
437	/* sendfile always needs emulation */	558	/* sendfile always needs emulation */
438	static ssize_t
439	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)
440	{	560	{
441	ssize_t res;	561	ssize_t res;
442		562
443	if (!count)	563	if (!count)
444	return 0;	564	return 0;
445		565
446	#if HAVE_SENDFILE	566	#if HAVE_SENDFILE
447	# if __linux	567	# if __linux
448	res = sendfile (ofd, ifd, &offset, count);	568	res = sendfile (ofd, ifd, &offset, count);
449		569
450	# elif __freebsd	570	# elif __freebsd
451	/*	571	/*
452	* 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
453	* wasted on making it similar to other I/O functions.	573	* wasted on making it similar to other I/O functions.
454	*/	574	*/
455	{	575	{
456	off_t sbytes;	576	off_t sbytes;
457	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	577	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
458		578
459	if (res < 0 && sbytes)	579	if (res < 0 && sbytes)
460	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	580	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
461	res = sbytes;	581	res = sbytes;
462	}	582	}
463		583
464	# elif __hpux	584	# elif __hpux
465	res = sendfile (ofd, ifd, offset, count, 0, 0);	585	res = sendfile (ofd, ifd, offset, count, 0, 0);
466		586
467	# elif __solaris	587	# elif __solaris
468	{	588	{
469	struct sendfilevec vec;	589	struct sendfilevec vec;
470	size_t sbytes;	590	size_t sbytes;
471		591
472	vec.sfv_fd = ifd;	592	vec.sfv_fd = ifd;
473	vec.sfv_flag = 0;	593	vec.sfv_flag = 0;
474	vec.sfv_off = offset;	594	vec.sfv_off = offset;
475	vec.sfv_len = count;	595	vec.sfv_len = count;
476		596
477	res = sendfilev (ofd, &vec, 1, &sbytes);	597	res = sendfilev (ofd, &vec, 1, &sbytes);
478		598
479	if (res < 0 && sbytes)	599	if (res < 0 && sbytes)
480	res = sbytes;	600	res = sbytes;
481	}	601	}
482		602
483	# else
484	res = -1;
485	errno = ENOSYS;
486	# endif	603	# endif
		604	#else
		605	res = -1;
		606	errno = ENOSYS;
487	#endif	607	#endif
488		608
489	if (res < 0	609	if (res < 0
490	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK	610	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK
491	#if __solaris	611	#if __solaris
492	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE	612	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE
493	#endif	613	#endif
494	)	614	)
495	)	615	)
496	{	616	{
497	/* emulate sendfile. this is a major pain in the ass */	617	/* emulate sendfile. this is a major pain in the ass */
498	char *buf = malloc (4096);	618	char buf[4096];
499	res = 0;	619	res = 0;
500		620
501	for (;;)	621	while (count)
502	{	622	{
503	ssize_t cnt;	623	ssize_t cnt;
504		624
505	cnt = pread (ifd, buf, 4096, offset);	625	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
506		626
507	if (cnt <= 0)	627	if (cnt <= 0)
508	{	628	{
509	if (cnt && !res) res = -1;	629	if (cnt && !res) res = -1;
510	break;	630	break;
511	}	631	}
512		632
513	cnt = write (ofd, buf, cnt);	633	cnt = write (ofd, buf, cnt);
514		634
515	if (cnt <= 0)	635	if (cnt <= 0)
516	{	636	{
517	if (cnt && !res) res = -1;	637	if (cnt && !res) res = -1;
518	break;	638	break;
519	}	639	}
520		640
521	offset += cnt;	641	offset += cnt;
522	res += cnt;	642	res += cnt;
		643	count -= cnt;
523	}	644	}
524
525	{
526	int errorno = errno;
527	free (buf);
528	errno = errorno;
529	}
530	}	645	}
531		646
532	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;
533	}	711	}
534		712
535	/*****************************************************************************/	713	/*****************************************************************************/
536		714
537	static void *
538	aio_proc (void *thr_arg)	715	static void aio_proc (void thr_arg)
539	{	716	{
540	aio_req req;	717	aio_req req;
541	int type;	718	int type;
542		719
543	do	720	do
…		…
562		739
563	pthread_mutex_unlock (&reqlock);	740	pthread_mutex_unlock (&reqlock);
564		741
565	errno = 0; /* strictly unnecessary */	742	errno = 0; /* strictly unnecessary */
566		743
567	type = req->type;	744	if (!req->cancelled)
568
569	switch (type)	745	switch (req->type)
570	{	746	{
571	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;
572	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;
573		749
574	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;
575	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;
576		752
577	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	753	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
578	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	754	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
579	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	755	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
580		756
581	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;
582	case REQ_CLOSE: req->result = close (req->fd); break;	758	case REQ_CLOSE: req->result = close (req->fd); break;
583	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	759	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
584	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;
585	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	763	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
586		764
587	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	765	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
588	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;
589		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
590	case REQ_QUIT:	779	case REQ_QUIT:
591	break;	780	break;
592		781
593	default:	782	default:
594	req->result = ENOSYS;	783	req->result = ENOSYS;
595	break;	784	break;
596	}	785	}
597		786
598	req->errorno = errno;	787	req->errorno = errno;
599		788
600	pthread_mutex_lock (&reslock);	789	pthread_mutex_lock (&reslock);
601		790
…		…
619	while (type != REQ_QUIT);	808	while (type != REQ_QUIT);
620		809
621	return 0;	810	return 0;
622	}	811	}
623		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
624	#define dREQ \	870	#define dREQ \
625	aio_req req; \	871	aio_req req; \
626	\	872	\
627	if (SvOK (callback) && !SvROK (callback)) \	873	if (SvOK (callback) && !SvROK (callback)) \
628	croak ("clalback must be undef or of reference type"); \	874	croak ("callback must be undef or of reference type"); \
629	\	875	\
630	Newz (0, req, 1, aio_cb); \	876	Newz (0, req, 1, aio_cb); \
631	if (!req) \	877	if (!req) \
632	croak ("out of memory during aio_req allocation"); \	878	croak ("out of memory during aio_req allocation"); \
633	\	879	\
634	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));
635		887
636	MODULE = IO::AIO PACKAGE = IO::AIO	888	MODULE = IO::AIO PACKAGE = IO::AIO
637		889
638	PROTOTYPES: ENABLE	890	PROTOTYPES: ENABLE
639		891
640	BOOT:	892	BOOT:
641	{	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
642	create_pipe ();	899	create_pipe ();
643	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	900	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
644	}	901	}
645		902
646	void	903	void
647	min_parallel(nthreads)	904	min_parallel (nthreads)
648	int nthreads	905	int nthreads
649	PROTOTYPE: $	906	PROTOTYPE: $
650		907
651	void	908	void
652	max_parallel(nthreads)	909	max_parallel (nthreads)
653	int nthreads	910	int nthreads
654	PROTOTYPE: $	911	PROTOTYPE: $
655		912
656	int	913	int
657	max_outstanding(nreqs)	914	max_outstanding (nreqs)
658	int nreqs	915	int nreqs
659	PROTOTYPE: $	916	PROTOTYPE: $
660	CODE:	917	CODE:
661	RETVAL = max_outstanding;	918	RETVAL = max_outstanding;
662	max_outstanding = nreqs;	919	max_outstanding = nreqs;
663		920
664	void	921	void
665	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	922	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
666	SV * pathname	923	SV * pathname
667	int flags	924	int flags
668	int mode	925	int mode
669	SV * callback	926	SV * callback
670	PROTOTYPE: $$$;$	927	PROTOTYPE: $$$;$
671	CODE:	928	PPCODE:
672	{	929	{
673	dREQ;	930	dREQ;
674		931
675	req->type = REQ_OPEN;	932	req->type = REQ_OPEN;
676	req->data = newSVsv (pathname);	933	req->data = newSVsv (pathname);
677	req->dataptr = SvPVbyte_nolen (req->data);	934	req->dataptr = SvPVbyte_nolen (req->data);
678	req->fd = flags;	935	req->fd = flags;
679	req->mode = mode;	936	req->mode = mode;
680		937
681	send_req (req);	938	REQ_SEND;
682	}	939	}
683		940
684	void	941	void
685	aio_close(fh,callback=&PL_sv_undef)	942	aio_close (fh,callback=&PL_sv_undef)
686	SV * fh	943	SV * fh
687	SV * callback	944	SV * callback
688	PROTOTYPE: $;$	945	PROTOTYPE: $;$
689	ALIAS:	946	ALIAS:
690	aio_close = REQ_CLOSE	947	aio_close = REQ_CLOSE
691	aio_fsync = REQ_FSYNC	948	aio_fsync = REQ_FSYNC
692	aio_fdatasync = REQ_FDATASYNC	949	aio_fdatasync = REQ_FDATASYNC
693	CODE:	950	PPCODE:
694	{	951	{
695	dREQ;	952	dREQ;
696		953
697	req->type = ix;	954	req->type = ix;
698	req->fh = newSVsv (fh);	955	req->fh = newSVsv (fh);
699	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	956	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
700		957
701	send_req (req);	958	REQ_SEND (req);
702	}	959	}
703		960
704	void	961	void
705	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	962	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
706	SV * fh	963	SV * fh
707	UV offset	964	UV offset
708	UV length	965	UV length
709	SV * data	966	SV * data
710	UV dataoffset	967	UV dataoffset
711	SV * callback	968	SV * callback
712	ALIAS:	969	ALIAS:
713	aio_read = REQ_READ	970	aio_read = REQ_READ
714	aio_write = REQ_WRITE	971	aio_write = REQ_WRITE
715	PROTOTYPE: $$$$$;$	972	PROTOTYPE: $$$$$;$
716	CODE:	973	PPCODE:
717	{	974	{
718	aio_req req;	975	aio_req req;
719	STRLEN svlen;	976	STRLEN svlen;
720	char *svptr = SvPVbyte (data, svlen);	977	char *svptr = SvPVbyte (data, svlen);
721		978
…		…
759	{	1016	{
760	SvREADONLY_on (data);	1017	SvREADONLY_on (data);
761	req->data2ptr = (void *)data;	1018	req->data2ptr = (void *)data;
762	}	1019	}
763		1020
764	send_req (req);	1021	REQ_SEND;
765	}	1022	}
766	}	1023	}
767		1024
768	void	1025	void
769	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1026	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
770	SV * out_fh	1027	SV * out_fh
771	SV * in_fh	1028	SV * in_fh
772	UV in_offset	1029	UV in_offset
773	UV length	1030	UV length
774	SV * callback	1031	SV * callback
775	PROTOTYPE: $$$$;$	1032	PROTOTYPE: $$$$;$
776	CODE:	1033	PPCODE:
777	{	1034	{
778	dREQ;	1035	dREQ;
779		1036
780	req->type = REQ_SENDFILE;	1037	req->type = REQ_SENDFILE;
781	req->fh = newSVsv (out_fh);	1038	req->fh = newSVsv (out_fh);
…		…
783	req->fh2 = newSVsv (in_fh);	1040	req->fh2 = newSVsv (in_fh);
784	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1041	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
785	req->offset = in_offset;	1042	req->offset = in_offset;
786	req->length = length;	1043	req->length = length;
787		1044
788	send_req (req);	1045	REQ_SEND;
789	}	1046	}
790		1047
791	void	1048	void
792	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1049	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
793	SV * fh	1050	SV * fh
794	UV offset	1051	UV offset
795	IV length	1052	IV length
796	SV * callback	1053	SV * callback
797	PROTOTYPE: $$$;$	1054	PROTOTYPE: $$$;$
798	CODE:	1055	PPCODE:
799	{	1056	{
800	dREQ;	1057	dREQ;
801		1058
802	req->type = REQ_READAHEAD;	1059	req->type = REQ_READAHEAD;
803	req->fh = newSVsv (fh);	1060	req->fh = newSVsv (fh);
804	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1061	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
805	req->offset = offset;	1062	req->offset = offset;
806	req->length = length;	1063	req->length = length;
807		1064
808	send_req (req);	1065	REQ_SEND;
809	}	1066	}
810		1067
811	void	1068	void
812	aio_stat(fh_or_path,callback=&PL_sv_undef)	1069	aio_stat (fh_or_path,callback=&PL_sv_undef)
813	SV * fh_or_path	1070	SV * fh_or_path
814	SV * callback	1071	SV * callback
815	ALIAS:	1072	ALIAS:
816	aio_stat = REQ_STAT	1073	aio_stat = REQ_STAT
817	aio_lstat = REQ_LSTAT	1074	aio_lstat = REQ_LSTAT
818	CODE:	1075	PPCODE:
819	{	1076	{
820	dREQ;	1077	dREQ;
821		1078
822	New (0, req->statdata, 1, Stat_t);	1079	New (0, req->statdata, 1, Stat_t);
823	if (!req->statdata)	1080	if (!req->statdata)
824	{	1081	{
825	free_req (req);	1082	req_free (req);
826	croak ("out of memory during aio_req->statdata allocation");	1083	croak ("out of memory during aio_req->statdata allocation");
827	}	1084	}
828		1085
829	if (SvPOK (fh_or_path))	1086	if (SvPOK (fh_or_path))
830	{	1087	{
…		…
837	req->type = REQ_FSTAT;	1094	req->type = REQ_FSTAT;
838	req->fh = newSVsv (fh_or_path);	1095	req->fh = newSVsv (fh_or_path);
839	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1096	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
840	}	1097	}
841		1098
842	send_req (req);	1099	REQ_SEND;
843	}	1100	}
844		1101
845	void	1102	void
846	aio_unlink(pathname,callback=&PL_sv_undef)	1103	aio_unlink (pathname,callback=&PL_sv_undef)
847	SV * pathname	1104	SV * pathname
848	SV * callback	1105	SV * callback
849	ALIAS:	1106	ALIAS:
850	aio_unlink = REQ_UNLINK	1107	aio_unlink = REQ_UNLINK
851	aio_rmdir = REQ_RMDIR	1108	aio_rmdir = REQ_RMDIR
		1109	aio_readdir = REQ_READDIR
852	CODE:	1110	PPCODE:
853	{	1111	{
854	dREQ;	1112	dREQ;
855		1113
856	req->type = ix;	1114	req->type = ix;
857	req->data = newSVsv (pathname);	1115	req->data = newSVsv (pathname);
858	req->dataptr = SvPVbyte_nolen (req->data);	1116	req->dataptr = SvPVbyte_nolen (req->data);
859		1117
860	send_req (req);	1118	REQ_SEND;
861	}	1119	}
862		1120
863	void	1121	void
864	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1122	aio_link (oldpath,newpath,callback=&PL_sv_undef)
865	SV * oldpath	1123	SV * oldpath
866	SV * newpath	1124	SV * newpath
867	SV * callback	1125	SV * callback
		1126	ALIAS:
		1127	aio_link = REQ_LINK
		1128	aio_symlink = REQ_SYMLINK
		1129	aio_rename = REQ_RENAME
868	CODE:	1130	PPCODE:
869	{	1131	{
870	dREQ;	1132	dREQ;
871		1133
872	req->type = REQ_SYMLINK;	1134	req->type = ix;
873	req->fh = newSVsv (oldpath);	1135	req->fh = newSVsv (oldpath);
874	req->data2ptr = SvPVbyte_nolen (req->fh);	1136	req->data2ptr = SvPVbyte_nolen (req->fh);
875	req->data = newSVsv (newpath);	1137	req->data = newSVsv (newpath);
876	req->dataptr = SvPVbyte_nolen (req->data);	1138	req->dataptr = SvPVbyte_nolen (req->data);
877		1139
878	send_req (req);	1140	REQ_SEND;
879	}	1141	}
880		1142
881	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
882	flush()	1174	flush ()
883	PROTOTYPE:	1175	PROTOTYPE:
884	CODE:	1176	CODE:
885	while (nreqs)	1177	while (nreqs)
886	{	1178	{
887	poll_wait ();	1179	poll_wait ();
…		…
927	CODE:	1219	CODE:
928	RETVAL = nreqs;	1220	RETVAL = nreqs;
929	OUTPUT:	1221	OUTPUT:
930	RETVAL	1222	RETVAL
931		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 1.36 by root, Tue Aug 23 01:18:04 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 1.36 by root, Tue Aug 23 01:18:04 2005 UTC vs.
Revision 1.48 by root, Sun Oct 22 10:33:19 2006 UTC