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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.35 by root, Tue Aug 23 01:16:50 2005 UTC vs.
Revision 1.45 by root, Sun Oct 22 00:19:05 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;
		93	typedef aio_cb *aio_group;
72		94
73	static int started, wanted;	95	static int started, wanted;
74	static volatile int nreqs;	96	static volatile int nreqs;
75	static int max_outstanding = 1<<30;	97	static int max_outstanding = 1<<30;
76	static int respipe [2];	98	static int respipe [2];
…		…
80	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	102	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
81		103
82	static volatile aio_req reqs, reqe; /* queue start, queue end */	104	static volatile aio_req reqs, reqe; /* queue start, queue end */
83	static volatile aio_req ress, rese; /* queue start, queue end */	105	static volatile aio_req ress, rese; /* queue start, queue end */
84		106
85	static void free_req (aio_req req)	107	static void req_free (aio_req req);
86	{
87	if (req->data)
88	SvREFCNT_dec (req->data);
89		108
90	if (req->fh)	109	/* must be called at most once */
91	SvREFCNT_dec (req->fh);	110	static SV req_sv (aio_req req, const char klass)
		111	{
		112	req->self = (SV *)newHV ();
		113	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
92		114
93	if (req->fh2)	115	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	}	116	}
104		117
105	static void	118	static aio_req SvAIO_REQ (SV *sv)
106	poll_wait ()	119	{
		120	if (!sv_derived_from (sv, AIO_REQ_KLASS) \|\| !SvROK (sv))
		121	croak ("object of class " AIO_REQ_KLASS " expected");
		122
		123	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		124
		125	return mg ? (aio_req)mg->mg_ptr : 0;
		126	}
		127
		128	static void poll_wait ()
107	{	129	{
108	if (nreqs && !ress)	130	if (nreqs && !ress)
109	{	131	{
110	fd_set rfd;	132	fd_set rfd;
111	FD_ZERO(&rfd);	133	FD_ZERO(&rfd);
…		…
113		135
114	select (respipe [0] + 1, &rfd, 0, 0, 0);	136	select (respipe [0] + 1, &rfd, 0, 0, 0);
115	}	137	}
116	}	138	}
117		139
118	static int	140	static void req_invoke (aio_req req)
119	poll_cb ()	141	{
		142	dSP;
		143	int errorno = errno;
		144
		145	if (req->cancelled \|\| !SvOK (req->callback))
		146	return;
		147
		148	errno = req->errorno;
		149
		150	ENTER;
		151	PUSHMARK (SP);
		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	XPUSHs (rv);
		177	}
		178	break;
		179
		180	case REQ_OPEN:
		181	{
		182	/* convert fd to fh */
		183	SV *fh;
		184
		185	XPUSHs (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_SLEEP:
		198	case REQ_GROUP:
		199	break;
		200
		201	default:
		202	XPUSHs (sv_2mortal (newSViv (req->result)));
		203	break;
		204	}
		205
		206
		207	PUTBACK;
		208	call_sv (req->callback, G_VOID \| G_EVAL);
		209	SPAGAIN;
		210
		211	if (SvTRUE (ERRSV))
		212	{
		213	req_free (req);
		214	croak (0);
		215	}
		216
		217	LEAVE;
		218
		219	errno = errorno;
		220	}
		221
		222	static void req_free (aio_req req)
		223	{
		224	if (req->grp)
		225	{
		226	aio_req grp = req->grp;
		227
		228	/* unlink request */
		229	req->grp_next->grp_prev = req->grp_prev;
		230	req->grp_prev->grp_next = req->grp_next;
		231
		232	if (grp->grp_next == grp)
		233	{
		234	req_invoke (grp);
		235	req_free (grp);
		236	}
		237	}
		238
		239	if (req->self)
		240	{
		241	sv_unmagic (req->self, PERL_MAGIC_ext);
		242	SvREFCNT_dec (req->self);
		243	}
		244
		245	if (req->data)
		246	SvREFCNT_dec (req->data);
		247
		248	if (req->fh)
		249	SvREFCNT_dec (req->fh);
		250
		251	if (req->fh2)
		252	SvREFCNT_dec (req->fh2);
		253
		254	if (req->statdata)
		255	Safefree (req->statdata);
		256
		257	if (req->callback)
		258	SvREFCNT_dec (req->callback);
		259
		260	if (req->type == REQ_READDIR && req->result >= 0)
		261	free (req->data2ptr);
		262
		263	Safefree (req);
		264	}
		265
		266	static void req_cancel (aio_req req)
		267	{
		268	req->cancelled = 1;
		269
		270	if (req->type == REQ_GROUP)
		271	{
		272	aio_req sub;
		273
		274	for (sub = req->grp_next; sub != req; sub = sub->grp_next)
		275	req_cancel (sub);
		276	}
		277	}
		278
		279	static int poll_cb ()
120	{	280	{
121	dSP;	281	dSP;
122	int count = 0;	282	int count = 0;
123	int do_croak = 0;	283	int do_croak = 0;
124	aio_req req;	284	aio_req req;
…		…
150		310
151	nreqs--;	311	nreqs--;
152		312
153	if (req->type == REQ_QUIT)	313	if (req->type == REQ_QUIT)
154	started--;	314	started--;
		315	else if (req->type == REQ_GROUP && req->grp_next != req)
		316	continue;
155	else	317	else
156	{	318	{
157	int errorno = errno;
158	errno = req->errorno;
159
160	if (req->type == REQ_READ)	319	if (req->type == REQ_READ)
161	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));	320	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
162		321
163	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))	322	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
164	SvREADONLY_off (req->data);	323	SvREADONLY_off (req->data);
…		…
168	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	327	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
169	PL_laststatval = req->result;	328	PL_laststatval = req->result;
170	PL_statcache = *(req->statdata);	329	PL_statcache = *(req->statdata);
171	}	330	}
172		331
173	ENTER;	332	req_invoke (req);
174	PUSHMARK (SP);
175	XPUSHs (sv_2mortal (newSViv (req->result)));
176		333
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++;	334	count++;
209	}	335	}
210		336
211	free_req (req);	337	req_free (req);
212	}	338	}
213		339
214	return count;	340	return count;
215	}	341	}
216		342
217	static void aio_proc(void arg);	343	static void aio_proc(void arg);
218		344
219	static void
220	start_thread (void)	345	static void start_thread (void)
221	{	346	{
222	sigset_t fullsigset, oldsigset;	347	sigset_t fullsigset, oldsigset;
223	pthread_t tid;	348	pthread_t tid;
224	pthread_attr_t attr;	349	pthread_attr_t attr;
225		350
…		…
234	started++;	359	started++;
235		360
236	sigprocmask (SIG_SETMASK, &oldsigset, 0);	361	sigprocmask (SIG_SETMASK, &oldsigset, 0);
237	}	362	}
238		363
239	static void	364	static void req_send (aio_req req)
240	send_req (aio_req req)
241	{	365	{
242	while (started < wanted && nreqs >= started)	366	while (started < wanted && nreqs >= started)
243	start_thread ();	367	start_thread ();
244		368
245	nreqs++;	369	nreqs++;
…		…
269		393
270	poll_wait ();	394	poll_wait ();
271	}	395	}
272	}	396	}
273		397
274	static void	398	static void end_thread (void)
275	end_thread (void)
276	{	399	{
277	aio_req req;	400	aio_req req;
278	Newz (0, req, 1, aio_cb);	401	Newz (0, req, 1, aio_cb);
279	req->type = REQ_QUIT;	402	req->type = REQ_QUIT;
280		403
281	send_req (req);	404	req_send (req);
282	}	405	}
283		406
284	static void min_parallel (int nthreads)	407	static void min_parallel (int nthreads)
285	{	408	{
286	if (wanted < nthreads)	409	if (wanted < nthreads)
…		…
316	croak ("cannot set result pipe to nonblocking mode");	439	croak ("cannot set result pipe to nonblocking mode");
317		440
318	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	441	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
319	croak ("cannot set result pipe to nonblocking mode");	442	croak ("cannot set result pipe to nonblocking mode");
320	}	443	}
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	}
364
365	/* currently noops */
366	#define LOCK_FD(fd) do { } while (0)
367	#define UNLOCK_FD(fd) do { } while (0)
368		444
369	/*****************************************************************************/	445	/*****************************************************************************/
370	/* work around various missing functions */	446	/* work around various missing functions */
371		447
372	#if !HAVE_PREADWRITE	448	#if !HAVE_PREADWRITE
…		…
376	/*	452	/*
377	* make our pread/pwrite safe against themselves, but not against	453	* make our pread/pwrite safe against themselves, but not against
378	* normal read/write by using a mutex. slows down execution a lot,	454	* normal read/write by using a mutex. slows down execution a lot,
379	* but that's your problem, not mine.	455	* but that's your problem, not mine.
380	*/	456	*/
381	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	457	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
382		458
383	static ssize_t	459	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
384	pread (int fd, void *buf, size_t count, off_t offset)
385	{	460	{
386	ssize_t res;	461	ssize_t res;
387	off_t ooffset;	462	off_t ooffset;
388		463
389	LOCK_FD (fd);	464	pthread_mutex_lock (&preadwritelock);
390	pthread_mutex_lock (&iolock); /* replace by LOCK_FD and private buffer */
391	ooffset = lseek (fd, 0, SEEK_CUR);	465	ooffset = lseek (fd, 0, SEEK_CUR);
392	lseek (fd, offset, SEEK_SET);	466	lseek (fd, offset, SEEK_SET);
393	res = read (fd, buf, count);	467	res = read (fd, buf, count);
394	lseek (fd, ooffset, SEEK_SET);	468	lseek (fd, ooffset, SEEK_SET);
395	pthread_mutex_unlock (&iolock);	469	pthread_mutex_unlock (&preadwritelock);
396	UNLOCK_FD (d);
397		470
398	return res;	471	return res;
399	}	472	}
400		473
401	static ssize_t
402	pwrite (int fd, void *buf, size_t count, off_t offset)	474	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
403	{	475	{
404	ssize_t res;	476	ssize_t res;
405	off_t ooffset;	477	off_t ooffset;
406		478
407	LOCK_FD (fd);	479	pthread_mutex_lock (&preadwritelock);
408	pthread_mutex_lock (&iolock); /* replace by LOCK_FD and private buffer */
409	ooffset = lseek (fd, 0, SEEK_CUR);	480	ooffset = lseek (fd, 0, SEEK_CUR);
410	lseek (fd, offset, SEEK_SET);	481	lseek (fd, offset, SEEK_SET);
411	res = write (fd, buf, count);	482	res = write (fd, buf, count);
412	lseek (fd, offset, SEEK_SET);	483	lseek (fd, offset, SEEK_SET);
413	pthread_mutex_unlock (&iolock);	484	pthread_mutex_unlock (&preadwritelock);
414	UNLOCK_FD (d);
415		485
416	return res;	486	return res;
417	}	487	}
418	#endif	488	#endif
419		489
…		…
422	#endif	492	#endif
423		493
424	#if !HAVE_READAHEAD	494	#if !HAVE_READAHEAD
425	# define readahead aio_readahead	495	# define readahead aio_readahead
426		496
		497	static ssize_t readahead (int fd, off_t offset, size_t count)
		498	{
427	static char readahead_buf[4096];	499	char readahead_buf[4096];
428		500
429	static ssize_t
430	readahead (int fd, off_t offset, size_t count)
431	{
432	while (count > 0)	501	while (count > 0)
433	{	502	{
434	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	503	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
435		504
436	pread (fd, readahead_buf, len, offset);	505	pread (fd, readahead_buf, len, offset);
…		…
440		509
441	errno = 0;	510	errno = 0;
442	}	511	}
443	#endif	512	#endif
444		513
		514	#if !HAVE_READDIR_R
		515	# define readdir_r aio_readdir_r
		516
		517	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		518
		519	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
		520	{
		521	struct dirent *e;
		522	int errorno;
		523
		524	pthread_mutex_lock (&readdirlock);
		525
		526	e = readdir (dirp);
		527	errorno = errno;
		528
		529	if (e)
		530	{
		531	*res = ent;
		532	strcpy (ent->d_name, e->d_name);
		533	}
		534	else
		535	*res = 0;
		536
		537	pthread_mutex_unlock (&readdirlock);
		538
		539	errno = errorno;
		540	return e ? 0 : -1;
		541	}
		542	#endif
		543
445	/* sendfile always needs emulation */	544	/* sendfile always needs emulation */
446	static ssize_t
447	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	545	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
448	{	546	{
449	ssize_t res;	547	ssize_t res;
450		548
451	if (!count)	549	if (!count)
452	return 0;	550	return 0;
453
454	LOCK_FD (ofd);
455		551
456	#if HAVE_SENDFILE	552	#if HAVE_SENDFILE
457	# if __linux	553	# if __linux
458	res = sendfile (ofd, ifd, &offset, count);	554	res = sendfile (ofd, ifd, &offset, count);
459		555
460	# elif __freebsd	556	# elif __freebsd
461	/*	557	/*
462	* Of course, the freebsd sendfile is a dire hack with no thoughts	558	* Of course, the freebsd sendfile is a dire hack with no thoughts
463	* wasted on making it similar to other I/O functions.	559	* wasted on making it similar to other I/O functions.
464	*/	560	*/
465	{	561	{
466	off_t sbytes;	562	off_t sbytes;
467	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	563	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
468		564
469	if (res < 0 && sbytes)	565	if (res < 0 && sbytes)
470	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	566	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
471	res = sbytes;	567	res = sbytes;
472	}	568	}
473		569
474	# elif __hpux	570	# elif __hpux
475	res = sendfile (ofd, ifd, offset, count, 0, 0);	571	res = sendfile (ofd, ifd, offset, count, 0, 0);
476		572
477	# elif __solaris	573	# elif __solaris
478	{	574	{
479	struct sendfilevec vec;	575	struct sendfilevec vec;
480	size_t sbytes;	576	size_t sbytes;
481		577
482	vec.sfv_fd = ifd;	578	vec.sfv_fd = ifd;
483	vec.sfv_flag = 0;	579	vec.sfv_flag = 0;
484	vec.sfv_off = offset;	580	vec.sfv_off = offset;
485	vec.sfv_len = count;	581	vec.sfv_len = count;
486		582
487	res = sendfilev (ofd, &vec, 1, &sbytes);	583	res = sendfilev (ofd, &vec, 1, &sbytes);
488		584
489	if (res < 0 && sbytes)	585	if (res < 0 && sbytes)
490	res = sbytes;	586	res = sbytes;
491	}	587	}
492		588
493	# else
494	res = -1;
495	errno = ENOSYS;
496	# endif	589	# endif
		590	#else
		591	res = -1;
		592	errno = ENOSYS;
497	#endif	593	#endif
498		594
499	if (res < 0	595	if (res < 0
500	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK	596	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK
501	#if __solaris	597	#if __solaris
502	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE	598	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE
503	#endif	599	#endif
504	)	600	)
505	)	601	)
506	{	602	{
507	/* emulate sendfile. this is a major pain in the ass */	603	/* emulate sendfile. this is a major pain in the ass */
508	char *buf = malloc (4096);	604	char buf[4096];
509	res = 0;	605	res = 0;
510		606
511	for (;;)	607	while (count)
512	{	608	{
513	ssize_t cnt;	609	ssize_t cnt;
514		610
515	cnt = pread (ifd, buf, 4096, offset);	611	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
516		612
517	if (cnt <= 0)	613	if (cnt <= 0)
518	{	614	{
519	if (cnt && !res) res = -1;	615	if (cnt && !res) res = -1;
520	break;	616	break;
521	}	617	}
522		618
523	cnt = write (ofd, buf, cnt);	619	cnt = write (ofd, buf, cnt);
524		620
525	if (cnt <= 0)	621	if (cnt <= 0)
526	{	622	{
527	if (cnt && !res) res = -1;	623	if (cnt && !res) res = -1;
528	break;	624	break;
529	}	625	}
530		626
531	offset += cnt;	627	offset += cnt;
532	res += cnt;	628	res += cnt;
		629	count -= cnt;
533	}	630	}
534
535	{
536	int errorno = errno;
537	free (buf);
538	errno = errorno;
539	}
540	}	631	}
541		632
542	UNLOCK_FD (ofd);
543
544	return res;	633	return res;
		634	}
		635
		636	/* read a full directory */
		637	static int scandir_ (const char path, void *namesp)
		638	{
		639	DIR *dirp = opendir (path);
		640	union
		641	{
		642	struct dirent d;
		643	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		644	} u;
		645	struct dirent *entp;
		646	char name, names;
		647	int memlen = 4096;
		648	int memofs = 0;
		649	int res = 0;
		650	int errorno;
		651
		652	if (!dirp)
		653	return -1;
		654
		655	names = malloc (memlen);
		656
		657	for (;;)
		658	{
		659	errno = 0, readdir_r (dirp, &u.d, &entp);
		660
		661	if (!entp)
		662	break;
		663
		664	name = entp->d_name;
		665
		666	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
		667	{
		668	int len = strlen (name) + 1;
		669
		670	res++;
		671
		672	while (memofs + len > memlen)
		673	{
		674	memlen *= 2;
		675	names = realloc (names, memlen);
		676	if (!names)
		677	break;
		678	}
		679
		680	memcpy (names + memofs, name, len);
		681	memofs += len;
		682	}
		683	}
		684
		685	errorno = errno;
		686	closedir (dirp);
		687
		688	if (errorno)
		689	{
		690	free (names);
		691	errno = errorno;
		692	res = -1;
		693	}
		694
		695	namesp = (void )names;
		696	return res;
545	}	697	}
546		698
547	/*****************************************************************************/	699	/*****************************************************************************/
548		700
549	static void *
550	aio_proc (void *thr_arg)	701	static void aio_proc (void thr_arg)
551	{	702	{
552	aio_req req;	703	aio_req req;
553	int type;	704	int type;
554		705
555	do	706	do
…		…
574		725
575	pthread_mutex_unlock (&reqlock);	726	pthread_mutex_unlock (&reqlock);
576		727
577	errno = 0; /* strictly unnecessary */	728	errno = 0; /* strictly unnecessary */
578		729
579	type = req->type;	730	if (!req->cancelled)
580
581	switch (type)	731	switch (req->type)
582	{	732	{
583	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	733	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
584	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	734	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
585		735
586	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	736	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
587	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	737	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
588		738
589	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	739	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
590	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	740	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
591	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	741	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
592		742
593	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	743	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
594	case REQ_CLOSE: req->result = close (req->fd); break;	744	case REQ_CLOSE: req->result = close (req->fd); break;
595	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	745	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
596	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	746	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		747	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		748	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
597	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	749	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
598		750
599	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	751	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
600	case REQ_FSYNC: req->result = fsync (req->fd); break;	752	case REQ_FSYNC: req->result = fsync (req->fd); break;
		753	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
601		754
		755	case REQ_SLEEP:
		756	{
		757	struct timeval tv;
		758
		759	tv.tv_sec = req->fd;
		760	tv.tv_usec = req->fd2;
		761
		762	req->result = select (0, 0, 0, 0, &tv);
		763	}
		764
602	case REQ_QUIT:	765	case REQ_QUIT:
603	break;	766	break;
604		767
605	default:	768	default:
606	req->result = ENOSYS;	769	req->result = ENOSYS;
607	break;	770	break;
608	}	771	}
609		772
610	req->errorno = errno;	773	req->errorno = errno;
611		774
612	pthread_mutex_lock (&reslock);	775	pthread_mutex_lock (&reslock);
613		776
…		…
631	while (type != REQ_QUIT);	794	while (type != REQ_QUIT);
632		795
633	return 0;	796	return 0;
634	}	797	}
635		798
		799	/*****************************************************************************/
		800
		801	static void atfork_prepare (void)
		802	{
		803	pthread_mutex_lock (&reqlock);
		804	pthread_mutex_lock (&reslock);
		805	#if !HAVE_PREADWRITE
		806	pthread_mutex_lock (&preadwritelock);
		807	#endif
		808	#if !HAVE_READDIR_R
		809	pthread_mutex_lock (&readdirlock);
		810	#endif
		811	}
		812
		813	static void atfork_parent (void)
		814	{
		815	#if !HAVE_READDIR_R
		816	pthread_mutex_unlock (&readdirlock);
		817	#endif
		818	#if !HAVE_PREADWRITE
		819	pthread_mutex_unlock (&preadwritelock);
		820	#endif
		821	pthread_mutex_unlock (&reslock);
		822	pthread_mutex_unlock (&reqlock);
		823	}
		824
		825	static void atfork_child (void)
		826	{
		827	aio_req prv;
		828
		829	started = 0;
		830
		831	while (reqs)
		832	{
		833	prv = reqs;
		834	reqs = prv->next;
		835	req_free (prv);
		836	}
		837
		838	reqs = reqe = 0;
		839
		840	while (ress)
		841	{
		842	prv = ress;
		843	ress = prv->next;
		844	req_free (prv);
		845	}
		846
		847	ress = rese = 0;
		848
		849	close (respipe [0]);
		850	close (respipe [1]);
		851	create_pipe ();
		852
		853	atfork_parent ();
		854	}
		855
636	#define dREQ \	856	#define dREQ \
637	aio_req req; \	857	aio_req req; \
638	\	858	\
639	if (SvOK (callback) && !SvROK (callback)) \	859	if (SvOK (callback) && !SvROK (callback)) \
640	croak ("clalback must be undef or of reference type"); \	860	croak ("callback must be undef or of reference type"); \
641	\	861	\
642	Newz (0, req, 1, aio_cb); \	862	Newz (0, req, 1, aio_cb); \
643	if (!req) \	863	if (!req) \
644	croak ("out of memory during aio_req allocation"); \	864	croak ("out of memory during aio_req allocation"); \
645	\	865	\
646	req->callback = newSVsv (callback);	866	req->callback = newSVsv (callback)
		867
		868	#define REQ_SEND \
		869	req_send (req); \
		870	\
		871	if (GIMME_V != G_VOID) \
		872	XPUSHs (req_sv (req, AIO_REQ_KLASS));
647		873
648	MODULE = IO::AIO PACKAGE = IO::AIO	874	MODULE = IO::AIO PACKAGE = IO::AIO
649		875
650	PROTOTYPES: ENABLE	876	PROTOTYPES: ENABLE
651		877
652	BOOT:	878	BOOT:
653	{	879	{
		880	HV *stash = gv_stashpv ("IO::AIO", 1);
		881	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		882	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		883	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		884
654	create_pipe ();	885	create_pipe ();
655	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	886	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
656	}	887	}
657		888
658	void	889	void
659	min_parallel(nthreads)	890	min_parallel (nthreads)
660	int nthreads	891	int nthreads
661	PROTOTYPE: $	892	PROTOTYPE: $
662		893
663	void	894	void
664	max_parallel(nthreads)	895	max_parallel (nthreads)
665	int nthreads	896	int nthreads
666	PROTOTYPE: $	897	PROTOTYPE: $
667		898
668	int	899	int
669	max_outstanding(nreqs)	900	max_outstanding (nreqs)
670	int nreqs	901	int nreqs
671	PROTOTYPE: $	902	PROTOTYPE: $
672	CODE:	903	CODE:
673	RETVAL = max_outstanding;	904	RETVAL = max_outstanding;
674	max_outstanding = nreqs;	905	max_outstanding = nreqs;
675		906
676	void	907	void
677	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	908	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
678	SV * pathname	909	SV * pathname
679	int flags	910	int flags
680	int mode	911	int mode
681	SV * callback	912	SV * callback
682	PROTOTYPE: $$$;$	913	PROTOTYPE: $$$;$
683	CODE:	914	PPCODE:
684	{	915	{
685	dREQ;	916	dREQ;
686		917
687	req->type = REQ_OPEN;	918	req->type = REQ_OPEN;
688	req->data = newSVsv (pathname);	919	req->data = newSVsv (pathname);
689	req->dataptr = SvPVbyte_nolen (req->data);	920	req->dataptr = SvPVbyte_nolen (req->data);
690	req->fd = flags;	921	req->fd = flags;
691	req->mode = mode;	922	req->mode = mode;
692		923
693	send_req (req);	924	REQ_SEND;
694	}	925	}
695		926
696	void	927	void
697	aio_close(fh,callback=&PL_sv_undef)	928	aio_close (fh,callback=&PL_sv_undef)
698	SV * fh	929	SV * fh
699	SV * callback	930	SV * callback
700	PROTOTYPE: $;$	931	PROTOTYPE: $;$
701	ALIAS:	932	ALIAS:
702	aio_close = REQ_CLOSE	933	aio_close = REQ_CLOSE
703	aio_fsync = REQ_FSYNC	934	aio_fsync = REQ_FSYNC
704	aio_fdatasync = REQ_FDATASYNC	935	aio_fdatasync = REQ_FDATASYNC
705	CODE:	936	PPCODE:
706	{	937	{
707	dREQ;	938	dREQ;
708		939
709	req->type = ix;	940	req->type = ix;
710	req->fh = newSVsv (fh);	941	req->fh = newSVsv (fh);
711	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	942	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
712		943
713	send_req (req);	944	REQ_SEND (req);
714	}	945	}
715		946
716	void	947	void
717	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	948	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
718	SV * fh	949	SV * fh
719	UV offset	950	UV offset
720	UV length	951	UV length
721	SV * data	952	SV * data
722	UV dataoffset	953	UV dataoffset
723	SV * callback	954	SV * callback
724	ALIAS:	955	ALIAS:
725	aio_read = REQ_READ	956	aio_read = REQ_READ
726	aio_write = REQ_WRITE	957	aio_write = REQ_WRITE
727	PROTOTYPE: $$$$$;$	958	PROTOTYPE: $$$$$;$
728	CODE:	959	PPCODE:
729	{	960	{
730	aio_req req;	961	aio_req req;
731	STRLEN svlen;	962	STRLEN svlen;
732	char *svptr = SvPVbyte (data, svlen);	963	char *svptr = SvPVbyte (data, svlen);
733		964
…		…
771	{	1002	{
772	SvREADONLY_on (data);	1003	SvREADONLY_on (data);
773	req->data2ptr = (void *)data;	1004	req->data2ptr = (void *)data;
774	}	1005	}
775		1006
776	send_req (req);	1007	REQ_SEND;
777	}	1008	}
778	}	1009	}
779		1010
780	void	1011	void
781	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1012	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
782	SV * out_fh	1013	SV * out_fh
783	SV * in_fh	1014	SV * in_fh
784	UV in_offset	1015	UV in_offset
785	UV length	1016	UV length
786	SV * callback	1017	SV * callback
787	PROTOTYPE: $$$$;$	1018	PROTOTYPE: $$$$;$
788	CODE:	1019	PPCODE:
789	{	1020	{
790	dREQ;	1021	dREQ;
791		1022
792	req->type = REQ_SENDFILE;	1023	req->type = REQ_SENDFILE;
793	req->fh = newSVsv (out_fh);	1024	req->fh = newSVsv (out_fh);
…		…
795	req->fh2 = newSVsv (in_fh);	1026	req->fh2 = newSVsv (in_fh);
796	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1027	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
797	req->offset = in_offset;	1028	req->offset = in_offset;
798	req->length = length;	1029	req->length = length;
799		1030
800	send_req (req);	1031	REQ_SEND;
801	}	1032	}
802		1033
803	void	1034	void
804	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1035	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
805	SV * fh	1036	SV * fh
806	UV offset	1037	UV offset
807	IV length	1038	IV length
808	SV * callback	1039	SV * callback
809	PROTOTYPE: $$$;$	1040	PROTOTYPE: $$$;$
810	CODE:	1041	PPCODE:
811	{	1042	{
812	dREQ;	1043	dREQ;
813		1044
814	req->type = REQ_READAHEAD;	1045	req->type = REQ_READAHEAD;
815	req->fh = newSVsv (fh);	1046	req->fh = newSVsv (fh);
816	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1047	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
817	req->offset = offset;	1048	req->offset = offset;
818	req->length = length;	1049	req->length = length;
819		1050
820	send_req (req);	1051	REQ_SEND;
821	}	1052	}
822		1053
823	void	1054	void
824	aio_stat(fh_or_path,callback=&PL_sv_undef)	1055	aio_stat (fh_or_path,callback=&PL_sv_undef)
825	SV * fh_or_path	1056	SV * fh_or_path
826	SV * callback	1057	SV * callback
827	ALIAS:	1058	ALIAS:
828	aio_stat = REQ_STAT	1059	aio_stat = REQ_STAT
829	aio_lstat = REQ_LSTAT	1060	aio_lstat = REQ_LSTAT
830	CODE:	1061	PPCODE:
831	{	1062	{
832	dREQ;	1063	dREQ;
833		1064
834	New (0, req->statdata, 1, Stat_t);	1065	New (0, req->statdata, 1, Stat_t);
835	if (!req->statdata)	1066	if (!req->statdata)
836	{	1067	{
837	free_req (req);	1068	req_free (req);
838	croak ("out of memory during aio_req->statdata allocation");	1069	croak ("out of memory during aio_req->statdata allocation");
839	}	1070	}
840		1071
841	if (SvPOK (fh_or_path))	1072	if (SvPOK (fh_or_path))
842	{	1073	{
…		…
849	req->type = REQ_FSTAT;	1080	req->type = REQ_FSTAT;
850	req->fh = newSVsv (fh_or_path);	1081	req->fh = newSVsv (fh_or_path);
851	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1082	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
852	}	1083	}
853		1084
854	send_req (req);	1085	REQ_SEND;
855	}	1086	}
856		1087
857	void	1088	void
858	aio_unlink(pathname,callback=&PL_sv_undef)	1089	aio_unlink (pathname,callback=&PL_sv_undef)
859	SV * pathname	1090	SV * pathname
860	SV * callback	1091	SV * callback
861	ALIAS:	1092	ALIAS:
862	aio_unlink = REQ_UNLINK	1093	aio_unlink = REQ_UNLINK
863	aio_rmdir = REQ_RMDIR	1094	aio_rmdir = REQ_RMDIR
		1095	aio_readdir = REQ_READDIR
864	CODE:	1096	PPCODE:
865	{	1097	{
866	dREQ;	1098	dREQ;
867		1099
868	req->type = ix;	1100	req->type = ix;
869	req->data = newSVsv (pathname);	1101	req->data = newSVsv (pathname);
870	req->dataptr = SvPVbyte_nolen (req->data);	1102	req->dataptr = SvPVbyte_nolen (req->data);
871		1103
872	send_req (req);	1104	REQ_SEND;
873	}	1105	}
874		1106
875	void	1107	void
876	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1108	aio_link (oldpath,newpath,callback=&PL_sv_undef)
877	SV * oldpath	1109	SV * oldpath
878	SV * newpath	1110	SV * newpath
879	SV * callback	1111	SV * callback
		1112	ALIAS:
		1113	aio_link = REQ_LINK
		1114	aio_symlink = REQ_SYMLINK
		1115	aio_rename = REQ_RENAME
880	CODE:	1116	PPCODE:
881	{	1117	{
882	dREQ;	1118	dREQ;
883		1119
884	req->type = REQ_SYMLINK;	1120	req->type = ix;
885	req->fh = newSVsv (oldpath);	1121	req->fh = newSVsv (oldpath);
886	req->data2ptr = SvPVbyte_nolen (req->fh);	1122	req->data2ptr = SvPVbyte_nolen (req->fh);
887	req->data = newSVsv (newpath);	1123	req->data = newSVsv (newpath);
888	req->dataptr = SvPVbyte_nolen (req->data);	1124	req->dataptr = SvPVbyte_nolen (req->data);
889		1125
890	send_req (req);	1126	REQ_SEND;
891	}	1127	}
892		1128
893	void	1129	void
		1130	aio_sleep (delay,callback=&PL_sv_undef)
		1131	double delay
		1132	SV * callback
		1133	PPCODE:
		1134	{
		1135	dREQ;
		1136
		1137	req->type = REQ_SLEEP;
		1138	req->fd = delay < 0. ? 0 : delay;
		1139	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1140
		1141	REQ_SEND;
		1142	}
		1143
		1144	void
		1145	aio_group (callback=&PL_sv_undef)
		1146	SV * callback
		1147	PROTOTYPE: ;&
		1148	PPCODE:
		1149	{
		1150	dREQ;
		1151	req->type = REQ_GROUP;
		1152	req->grp_next = req;
		1153	req->grp_prev = req;
		1154
		1155	req_send (req);
		1156	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1157	}
		1158
		1159	void
894	flush()	1160	flush ()
895	PROTOTYPE:	1161	PROTOTYPE:
896	CODE:	1162	CODE:
897	while (nreqs)	1163	while (nreqs)
898	{	1164	{
899	poll_wait ();	1165	poll_wait ();
…		…
939	CODE:	1205	CODE:
940	RETVAL = nreqs;	1206	RETVAL = nreqs;
941	OUTPUT:	1207	OUTPUT:
942	RETVAL	1208	RETVAL
943		1209
		1210	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1211
		1212	void
		1213	cancel (aio_req_ornot req)
		1214	PROTOTYPE:
		1215	CODE:
		1216	req_cancel (req);
		1217
		1218	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1219
		1220	void
		1221	add (aio_req grp, ...)
		1222	PROTOTYPE: $;@
		1223	PPCODE:
		1224	{
		1225	int i;
		1226
		1227	for (i = 1; i < items; ++i )
		1228	{
		1229	aio_req req = SvAIO_REQ (ST (i));
		1230
		1231	req->grp_prev = grp;
		1232	req->grp_next = grp->grp_next;
		1233	grp->grp_next->grp_prev = req;
		1234	grp->grp_next = req;
		1235
		1236	req->grp = grp;
		1237
		1238	if (GIMME_V != G_VOID)
		1239	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1240	}
		1241	}
		1242

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.35 by root, Tue Aug 23 01:16:50 2005 UTC vs. Revision 1.45 by root, Sun Oct 22 00:19:05 2006 UTC

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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.35 by root, Tue Aug 23 01:16:50 2005 UTC vs.
Revision 1.45 by root, Sun Oct 22 00:19:05 2006 UTC