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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.31 by root, Thu Aug 18 16:34:53 2005 UTC vs.
Revision 1.50 by root, Sun Oct 22 21:13:47 2006 UTC

…		…
5	#include "perl.h"	5	#include "perl.h"
6	#include "XSUB.h"	6	#include "XSUB.h"
7		7
8	#include "autoconf/config.h"	8	#include "autoconf/config.h"
9		9
		10	#include <pthread.h>
		11
		12	#include <stddef.h>
		13	#include <errno.h>
		14	#include <sys/time.h>
		15	#include <sys/select.h>
10	#include <sys/types.h>	16	#include <sys/types.h>
11	#include <sys/stat.h>	17	#include <sys/stat.h>
12		18	#include <limits.h>
13	#include <unistd.h>	19	#include <unistd.h>
14	#include <fcntl.h>	20	#include <fcntl.h>
15	#include <signal.h>	21	#include <signal.h>
16	#include <sched.h>	22	#include <sched.h>
17		23
18	#include <pthread.h>	24	#if HAVE_SENDFILE
		25	# if __linux
		26	# include <sys/sendfile.h>
		27	# elif __freebsd
		28	# include <sys/socket.h>
		29	# include <sys/uio.h>
		30	# elif __hpux
		31	# include <sys/socket.h>
		32	# elif __solaris /* not yet */
		33	# include <sys/sendfile.h>
		34	# else
		35	# error sendfile support requested but not available
		36	# endif
		37	#endif
19		38
20	typedef void InputStream; / hack, but 5.6.1 is simply toooo old ;) */	39	/* used for struct dirent, AIX doesn't provide it */
21	typedef void OutputStream; / hack, but 5.6.1 is simply toooo old ;) */	40	#ifndef NAME_MAX
22	typedef void InOutStream; / hack, but 5.6.1 is simply toooo old ;) */	41	# define NAME_MAX 4096
		42	#endif
23		43
24	#if __ia64	44	#if __ia64
25	# define STACKSIZE 65536	45	# define STACKSIZE 65536
26	#else	46	#else
27	# define STACKSIZE 4096	47	# define STACKSIZE 8192
28	#endif	48	#endif
29		49
30	enum {	50	enum {
31	REQ_QUIT,	51	REQ_QUIT,
32	REQ_OPEN, REQ_CLOSE,	52	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,	53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		54	REQ_SENDFILE,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,	56	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,	57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
37	REQ_SYMLINK,	58	REQ_READDIR,
		59	REQ_LINK, REQ_SYMLINK,
		60	REQ_SLEEP,
		61	REQ_GROUP,
38	};	62	};
39		63
		64	#define AIO_REQ_KLASS "IO::AIO::REQ"
		65	#define AIO_GRP_KLASS "IO::AIO::GRP"
		66
40	typedef struct aio_cb {	67	typedef struct aio_cb
		68	{
41	struct aio_cb *volatile next;	69	struct aio_cb *volatile next;
42		70
43	int type;	71	struct aio_cb grp, grp_prev, grp_next, grp_first;
44		72
45	int fd;	73	SV self; / the perl counterpart of this request, if any */
		74
		75	SV data, callback;
		76	SV fh, fh2;
		77	void dataptr, data2ptr;
		78	Stat_t *statdata;
46	off_t offset;	79	off_t offset;
47	size_t length;	80	size_t length;
48	ssize_t result;	81	ssize_t result;
		82
		83	int type;
		84	int fd, fd2;
		85	int errorno;
		86	STRLEN dataoffset;
49	mode_t mode; /* open */	87	mode_t mode; /* open */
50	int errorno;	88	unsigned char cancelled;
51	SV data, callback, *fh;
52	void dataptr, data2ptr;
53	STRLEN dataoffset;
54
55	Stat_t *statdata;
56	} aio_cb;	89	} aio_cb;
57		90
58	typedef aio_cb *aio_req;	91	typedef aio_cb *aio_req;
		92	typedef aio_cb *aio_req_ornot;
59		93
60	static int started, wanted;	94	static int started, wanted;
61	static volatile int nreqs;	95	static volatile int nreqs;
62	static int max_outstanding = 1<<30;	96	static int max_outstanding = 1<<30;
63	static int respipe [2];	97	static int respipe [2];
…		…
67	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68		102
69	static volatile aio_req reqs, reqe; /* queue start, queue end */	103	static volatile aio_req reqs, reqe; /* queue start, queue end */
70	static volatile aio_req ress, rese; /* queue start, queue end */	104	static volatile aio_req ress, rese; /* queue start, queue end */
71		105
		106	static void req_invoke (aio_req req);
72	static void free_req (aio_req req)	107	static void req_free (aio_req req);
73	{
74	if (req->data)
75	SvREFCNT_dec (req->data);
76		108
		109	/* must be called at most once */
		110	static SV req_sv (aio_req req, const char klass)
		111	{
77	if (req->fh)	112	if (!req->self)
		113	{
		114	req->self = (SV *)newHV ();
		115	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		116	}
		117
		118	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		119	}
		120
		121	static aio_req SvAIO_REQ (SV *sv)
		122	{
		123	if (!sv_derived_from (sv, AIO_REQ_KLASS) \|\| !SvROK (sv))
		124	croak ("object of class " AIO_REQ_KLASS " expected");
		125
		126	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		127
		128	return mg ? (aio_req)mg->mg_ptr : 0;
		129	}
		130
		131	static void aio_grp_feed (aio_req grp)
		132	{
		133	while (grp->length < grp->fd2)
		134	{
		135	int old_len = grp->length;
		136
		137	if (grp->fh2 && SvOK (grp->fh2))
		138	{
		139	dSP;
		140
		141	ENTER;
		142	SAVETMPS;
		143	PUSHMARK (SP);
		144	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		145	PUTBACK;
		146	call_sv (grp->fh2, G_VOID \| G_EVAL);
		147	SPAGAIN;
		148	FREETMPS;
		149	LEAVE;
		150	}
		151
		152	/* stop if no progress has been made */
		153	if (old_len == grp->length)
		154	{
78	SvREFCNT_dec (req->fh);	155	SvREFCNT_dec (grp->fh2);
79		156	grp->fh2 = 0;
80	if (req->statdata)	157	break;
81	Safefree (req->statdata);	158	}
82		159	}
83	if (req->callback)
84	SvREFCNT_dec (req->callback);
85
86	Safefree (req);
87	}	160	}
88		161
89	static void	162	static void aio_grp_dec (aio_req grp)
90	poll_wait ()	163	{
		164	--grp->length;
		165
		166	/* call feeder, if applicable */
		167	aio_grp_feed (grp);
		168
		169	/* finish, if done */
		170	if (!grp->length && grp->fd)
		171	{
		172	req_invoke (grp);
		173	req_free (grp);
		174	}
		175	}
		176
		177	static void poll_wait ()
91	{	178	{
92	if (nreqs && !ress)	179	if (nreqs && !ress)
93	{	180	{
94	fd_set rfd;	181	fd_set rfd;
95	FD_ZERO(&rfd);	182	FD_ZERO(&rfd);
…		…
97		184
98	select (respipe [0] + 1, &rfd, 0, 0, 0);	185	select (respipe [0] + 1, &rfd, 0, 0, 0);
99	}	186	}
100	}	187	}
101		188
102	static int	189	static void req_invoke (aio_req req)
103	poll_cb ()	190	{
		191	dSP;
		192	int errorno = errno;
		193
		194	if (req->cancelled \|\| !SvOK (req->callback))
		195	return;
		196
		197	errno = req->errorno;
		198
		199	ENTER;
		200	SAVETMPS;
		201	PUSHMARK (SP);
		202	EXTEND (SP, 1);
		203
		204	switch (req->type)
		205	{
		206	case REQ_READDIR:
		207	{
		208	SV *rv = &PL_sv_undef;
		209
		210	if (req->result >= 0)
		211	{
		212	char *buf = req->data2ptr;
		213	AV *av = newAV ();
		214
		215	while (req->result)
		216	{
		217	SV *sv = newSVpv (buf, 0);
		218
		219	av_push (av, sv);
		220	buf += SvCUR (sv) + 1;
		221	req->result--;
		222	}
		223
		224	rv = sv_2mortal (newRV_noinc ((SV *)av));
		225	}
		226
		227	PUSHs (rv);
		228	}
		229	break;
		230
		231	case REQ_OPEN:
		232	{
		233	/* convert fd to fh */
		234	SV *fh;
		235
		236	PUSHs (sv_2mortal (newSViv (req->result)));
		237	PUTBACK;
		238	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		239	SPAGAIN;
		240
		241	fh = SvREFCNT_inc (POPs);
		242
		243	PUSHMARK (SP);
		244	XPUSHs (sv_2mortal (fh));
		245	}
		246	break;
		247
		248	case REQ_GROUP:
		249	req->fd = 2; /* mark group as finished */
		250
		251	if (req->data)
		252	{
		253	int i;
		254	AV av = (AV )req->data;
		255
		256	EXTEND (SP, AvFILL (av) + 1);
		257	for (i = 0; i <= AvFILL (av); ++i)
		258	PUSHs (*av_fetch (av, i, 0));
		259	}
		260	break;
		261
		262	case REQ_SLEEP:
		263	break;
		264
		265	default:
		266	PUSHs (sv_2mortal (newSViv (req->result)));
		267	break;
		268	}
		269
		270
		271	PUTBACK;
		272	call_sv (req->callback, G_VOID \| G_EVAL);
		273	SPAGAIN;
		274
		275	if (SvTRUE (ERRSV))
		276	{
		277	req_free (req);
		278	croak (0);
		279	}
		280
		281	FREETMPS;
		282	LEAVE;
		283
		284	errno = errorno;
		285	}
		286
		287	static void req_free (aio_req req)
		288	{
		289	if (req->grp)
		290	{
		291	aio_req grp = req->grp;
		292
		293	/* unlink request */
		294	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		295	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		296
		297	if (grp->grp_first == req)
		298	grp->grp_first = req->grp_next;
		299
		300	aio_grp_dec (grp);
		301	}
		302
		303	if (req->self)
		304	{
		305	sv_unmagic (req->self, PERL_MAGIC_ext);
		306	SvREFCNT_dec (req->self);
		307	}
		308
		309	SvREFCNT_dec (req->data);
		310	SvREFCNT_dec (req->fh);
		311	SvREFCNT_dec (req->fh2);
		312	SvREFCNT_dec (req->callback);
		313	Safefree (req->statdata);
		314
		315	if (req->type == REQ_READDIR && req->result >= 0)
		316	free (req->data2ptr);
		317
		318	Safefree (req);
		319	}
		320
		321	static void req_cancel (aio_req req)
		322	{
		323	req->cancelled = 1;
		324
		325	if (req->type == REQ_GROUP)
		326	{
		327	aio_req sub;
		328
		329	for (sub = req->grp_first; sub; sub = sub->grp_next)
		330	req_cancel (sub);
		331	}
		332	}
		333
		334	static int poll_cb ()
104	{	335	{
105	dSP;	336	dSP;
106	int count = 0;	337	int count = 0;
107	int do_croak = 0;	338	int do_croak = 0;
108	aio_req req;	339	aio_req req;
…		…
130	pthread_mutex_unlock (&reslock);	361	pthread_mutex_unlock (&reslock);
131		362
132	if (!req)	363	if (!req)
133	break;	364	break;
134		365
135	nreqs--;	366	--nreqs;
136		367
137	if (req->type == REQ_QUIT)	368	if (req->type == REQ_QUIT)
138	started--;	369	started--;
		370	else if (req->type == REQ_GROUP && req->length)
		371	{
		372	req->fd = 1; /* mark request as delayed */
		373	continue;
		374	}
139	else	375	else
140	{	376	{
141	int errorno = errno;
142	errno = req->errorno;
143
144	if (req->type == REQ_READ)	377	if (req->type == REQ_READ)
145	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));	378	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
146		379
147	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))	380	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
148	SvREADONLY_off (req->data);	381	SvREADONLY_off (req->data);
…		…
152	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	385	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
153	PL_laststatval = req->result;	386	PL_laststatval = req->result;
154	PL_statcache = *(req->statdata);	387	PL_statcache = *(req->statdata);
155	}	388	}
156		389
157	ENTER;	390	req_invoke (req);
158	PUSHMARK (SP);
159	XPUSHs (sv_2mortal (newSViv (req->result)));
160		391
161	if (req->type == REQ_OPEN)
162	{
163	/* convert fd to fh */
164	SV *fh;
165
166	PUTBACK;
167	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
168	SPAGAIN;
169
170	fh = SvREFCNT_inc (POPs);
171
172	PUSHMARK (SP);
173	XPUSHs (sv_2mortal (fh));
174	}
175
176	if (SvOK (req->callback))
177	{
178	PUTBACK;
179	call_sv (req->callback, G_VOID \| G_EVAL);
180	SPAGAIN;
181
182	if (SvTRUE (ERRSV))
183	{
184	free_req (req);
185	croak (0);
186	}
187	}
188
189	LEAVE;
190
191	errno = errorno;
192	count++;	392	count++;
193	}	393	}
194		394
195	free_req (req);	395	req_free (req);
196	}	396	}
197		397
198	return count;	398	return count;
199	}	399	}
200		400
201	static void aio_proc(void arg);	401	static void aio_proc(void arg);
202		402
203	static void
204	start_thread (void)	403	static void start_thread (void)
205	{	404	{
206	sigset_t fullsigset, oldsigset;	405	sigset_t fullsigset, oldsigset;
207	pthread_t tid;	406	pthread_t tid;
208	pthread_attr_t attr;	407	pthread_attr_t attr;
209		408
…		…
218	started++;	417	started++;
219		418
220	sigprocmask (SIG_SETMASK, &oldsigset, 0);	419	sigprocmask (SIG_SETMASK, &oldsigset, 0);
221	}	420	}
222		421
223	static void	422	static void req_send (aio_req req)
224	send_req (aio_req req)
225	{	423	{
226	while (started < wanted && nreqs >= started)	424	while (started < wanted && nreqs >= started)
227	start_thread ();	425	start_thread ();
228		426
229	nreqs++;	427	++nreqs;
230		428
231	pthread_mutex_lock (&reqlock);	429	pthread_mutex_lock (&reqlock);
232		430
233	req->next = 0;	431	req->next = 0;
234		432
…		…
253		451
254	poll_wait ();	452	poll_wait ();
255	}	453	}
256	}	454	}
257		455
258	static void	456	static void end_thread (void)
259	end_thread (void)
260	{	457	{
261	aio_req req;	458	aio_req req;
262	Newz (0, req, 1, aio_cb);	459	Newz (0, req, 1, aio_cb);
263	req->type = REQ_QUIT;	460	req->type = REQ_QUIT;
264		461
265	send_req (req);	462	req_send (req);
266	}	463	}
267		464
268	static void min_parallel (int nthreads)	465	static void min_parallel (int nthreads)
269	{	466	{
270	if (wanted < nthreads)	467	if (wanted < nthreads)
…		…
299	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	496	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
300	croak ("cannot set result pipe to nonblocking mode");	497	croak ("cannot set result pipe to nonblocking mode");
301		498
302	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	499	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
303	croak ("cannot set result pipe to nonblocking mode");	500	croak ("cannot set result pipe to nonblocking mode");
304	}
305
306	static void atfork_prepare (void)
307	{
308	pthread_mutex_lock (&reqlock);
309	pthread_mutex_lock (&reslock);
310	}
311
312	static void atfork_parent (void)
313	{
314	pthread_mutex_unlock (&reslock);
315	pthread_mutex_unlock (&reqlock);
316	}
317
318	static void atfork_child (void)
319	{
320	aio_req prv;
321
322	started = 0;
323
324	while (reqs)
325	{
326	prv = reqs;
327	reqs = prv->next;
328	free_req (prv);
329	}
330
331	reqs = reqe = 0;
332
333	while (ress)
334	{
335	prv = ress;
336	ress = prv->next;
337	free_req (prv);
338	}
339
340	ress = rese = 0;
341
342	close (respipe [0]);
343	close (respipe [1]);
344	create_pipe ();
345
346	atfork_parent ();
347	}	501	}
348		502
349	/*****************************************************************************/	503	/*****************************************************************************/
350	/* work around various missing functions */	504	/* work around various missing functions */
351		505
…		…
356	/*	510	/*
357	* make our pread/pwrite safe against themselves, but not against	511	* make our pread/pwrite safe against themselves, but not against
358	* normal read/write by using a mutex. slows down execution a lot,	512	* normal read/write by using a mutex. slows down execution a lot,
359	* but that's your problem, not mine.	513	* but that's your problem, not mine.
360	*/	514	*/
361	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	515	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
362		516
363	static ssize_t	517	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
364	pread (int fd, void *buf, size_t count, off_t offset)
365	{	518	{
366	ssize_t res;	519	ssize_t res;
367	off_t ooffset;	520	off_t ooffset;
368		521
369	pthread_mutex_lock (&iolock);	522	pthread_mutex_lock (&preadwritelock);
370	ooffset = lseek (fd, 0, SEEK_CUR);	523	ooffset = lseek (fd, 0, SEEK_CUR);
371	lseek (fd, offset, SEEK_SET);	524	lseek (fd, offset, SEEK_SET);
372	res = read (fd, buf, count);	525	res = read (fd, buf, count);
373	lseek (fd, ooffset, SEEK_SET);	526	lseek (fd, ooffset, SEEK_SET);
374	pthread_mutex_unlock (&iolock);	527	pthread_mutex_unlock (&preadwritelock);
375		528
376	return res;	529	return res;
377	}	530	}
378		531
379	static ssize_t
380	pwrite (int fd, void *buf, size_t count, off_t offset)	532	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
381	{	533	{
382	ssize_t res;	534	ssize_t res;
383	off_t ooffset;	535	off_t ooffset;
384		536
385	pthread_mutex_lock (&iolock);	537	pthread_mutex_lock (&preadwritelock);
386	ooffset = lseek (fd, 0, SEEK_CUR);	538	ooffset = lseek (fd, 0, SEEK_CUR);
387	lseek (fd, offset, SEEK_SET);	539	lseek (fd, offset, SEEK_SET);
388	res = write (fd, buf, count);	540	res = write (fd, buf, count);
389	lseek (fd, offset, SEEK_SET);	541	lseek (fd, offset, SEEK_SET);
390	pthread_mutex_unlock (&iolock);	542	pthread_mutex_unlock (&preadwritelock);
391		543
392	return res;	544	return res;
393	}	545	}
394	#endif	546	#endif
395		547
…		…
398	#endif	550	#endif
399		551
400	#if !HAVE_READAHEAD	552	#if !HAVE_READAHEAD
401	# define readahead aio_readahead	553	# define readahead aio_readahead
402		554
		555	static ssize_t readahead (int fd, off_t offset, size_t count)
		556	{
403	static char readahead_buf[4096];	557	char readahead_buf[4096];
404		558
405	static ssize_t
406	readahead (int fd, off_t offset, size_t count)
407	{
408	while (count > 0)	559	while (count > 0)
409	{	560	{
410	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	561	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
411		562
412	pread (fd, readahead_buf, len, offset);	563	pread (fd, readahead_buf, len, offset);
…		…
416		567
417	errno = 0;	568	errno = 0;
418	}	569	}
419	#endif	570	#endif
420		571
		572	#if !HAVE_READDIR_R
		573	# define readdir_r aio_readdir_r
		574
		575	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		576
		577	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
		578	{
		579	struct dirent *e;
		580	int errorno;
		581
		582	pthread_mutex_lock (&readdirlock);
		583
		584	e = readdir (dirp);
		585	errorno = errno;
		586
		587	if (e)
		588	{
		589	*res = ent;
		590	strcpy (ent->d_name, e->d_name);
		591	}
		592	else
		593	*res = 0;
		594
		595	pthread_mutex_unlock (&readdirlock);
		596
		597	errno = errorno;
		598	return e ? 0 : -1;
		599	}
		600	#endif
		601
		602	/* sendfile always needs emulation */
		603	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
		604	{
		605	ssize_t res;
		606
		607	if (!count)
		608	return 0;
		609
		610	#if HAVE_SENDFILE
		611	# if __linux
		612	res = sendfile (ofd, ifd, &offset, count);
		613
		614	# elif __freebsd
		615	/*
		616	* Of course, the freebsd sendfile is a dire hack with no thoughts
		617	* wasted on making it similar to other I/O functions.
		618	*/
		619	{
		620	off_t sbytes;
		621	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		622
		623	if (res < 0 && sbytes)
		624	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
		625	res = sbytes;
		626	}
		627
		628	# elif __hpux
		629	res = sendfile (ofd, ifd, offset, count, 0, 0);
		630
		631	# elif __solaris
		632	{
		633	struct sendfilevec vec;
		634	size_t sbytes;
		635
		636	vec.sfv_fd = ifd;
		637	vec.sfv_flag = 0;
		638	vec.sfv_off = offset;
		639	vec.sfv_len = count;
		640
		641	res = sendfilev (ofd, &vec, 1, &sbytes);
		642
		643	if (res < 0 && sbytes)
		644	res = sbytes;
		645	}
		646
		647	# endif
		648	#else
		649	res = -1;
		650	errno = ENOSYS;
		651	#endif
		652
		653	if (res < 0
		654	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK
		655	#if __solaris
		656	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE
		657	#endif
		658	)
		659	)
		660	{
		661	/* emulate sendfile. this is a major pain in the ass */
		662	char buf[4096];
		663	res = 0;
		664
		665	while (count)
		666	{
		667	ssize_t cnt;
		668
		669	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
		670
		671	if (cnt <= 0)
		672	{
		673	if (cnt && !res) res = -1;
		674	break;
		675	}
		676
		677	cnt = write (ofd, buf, cnt);
		678
		679	if (cnt <= 0)
		680	{
		681	if (cnt && !res) res = -1;
		682	break;
		683	}
		684
		685	offset += cnt;
		686	res += cnt;
		687	count -= cnt;
		688	}
		689	}
		690
		691	return res;
		692	}
		693
		694	/* read a full directory */
		695	static int scandir_ (const char path, void *namesp)
		696	{
		697	DIR *dirp = opendir (path);
		698	union
		699	{
		700	struct dirent d;
		701	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		702	} u;
		703	struct dirent *entp;
		704	char name, names;
		705	int memlen = 4096;
		706	int memofs = 0;
		707	int res = 0;
		708	int errorno;
		709
		710	if (!dirp)
		711	return -1;
		712
		713	names = malloc (memlen);
		714
		715	for (;;)
		716	{
		717	errno = 0, readdir_r (dirp, &u.d, &entp);
		718
		719	if (!entp)
		720	break;
		721
		722	name = entp->d_name;
		723
		724	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
		725	{
		726	int len = strlen (name) + 1;
		727
		728	res++;
		729
		730	while (memofs + len > memlen)
		731	{
		732	memlen *= 2;
		733	names = realloc (names, memlen);
		734	if (!names)
		735	break;
		736	}
		737
		738	memcpy (names + memofs, name, len);
		739	memofs += len;
		740	}
		741	}
		742
		743	errorno = errno;
		744	closedir (dirp);
		745
		746	if (errorno)
		747	{
		748	free (names);
		749	errno = errorno;
		750	res = -1;
		751	}
		752
		753	namesp = (void )names;
		754	return res;
		755	}
		756
421	/*****************************************************************************/	757	/*****************************************************************************/
422		758
423	static void *
424	aio_proc (void *thr_arg)	759	static void aio_proc (void thr_arg)
425	{	760	{
426	aio_req req;	761	aio_req req;
427	int type;	762	int type;
428		763
429	do	764	do
…		…
448		783
449	pthread_mutex_unlock (&reqlock);	784	pthread_mutex_unlock (&reqlock);
450		785
451	errno = 0; /* strictly unnecessary */	786	errno = 0; /* strictly unnecessary */
452		787
453	type = req->type;	788	if (!req->cancelled)
454		789	switch (type = req->type) /* remember type for QUIT check */
455	switch (type)
456	{	790	{
457	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	791	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
458	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	792	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
459		793
460	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	794	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
		795	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
461		796
462	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	797	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
463	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	798	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
464	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	799	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
465		800
466	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	801	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
467	case REQ_CLOSE: req->result = close (req->fd); break;	802	case REQ_CLOSE: req->result = close (req->fd); break;
468	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	803	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
469	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	804	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		805	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		806	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
470	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	807	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
471		808
472	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	809	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
473	case REQ_FSYNC: req->result = fsync (req->fd); break;	810	case REQ_FSYNC: req->result = fsync (req->fd); break;
		811	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
474		812
		813	case REQ_SLEEP:
		814	{
		815	struct timeval tv;
		816
		817	tv.tv_sec = req->fd;
		818	tv.tv_usec = req->fd2;
		819
		820	req->result = select (0, 0, 0, 0, &tv);
		821	}
		822
475	case REQ_QUIT:	823	case REQ_QUIT:
476	break;	824	break;
477		825
478	default:	826	default:
479	req->result = ENOSYS;	827	req->result = ENOSYS;
480	break;	828	break;
481	}	829	}
482		830
483	req->errorno = errno;	831	req->errorno = errno;
484		832
485	pthread_mutex_lock (&reslock);	833	pthread_mutex_lock (&reslock);
486		834
…		…
504	while (type != REQ_QUIT);	852	while (type != REQ_QUIT);
505		853
506	return 0;	854	return 0;
507	}	855	}
508		856
		857	/*****************************************************************************/
		858
		859	static void atfork_prepare (void)
		860	{
		861	pthread_mutex_lock (&reqlock);
		862	pthread_mutex_lock (&reslock);
		863	#if !HAVE_PREADWRITE
		864	pthread_mutex_lock (&preadwritelock);
		865	#endif
		866	#if !HAVE_READDIR_R
		867	pthread_mutex_lock (&readdirlock);
		868	#endif
		869	}
		870
		871	static void atfork_parent (void)
		872	{
		873	#if !HAVE_READDIR_R
		874	pthread_mutex_unlock (&readdirlock);
		875	#endif
		876	#if !HAVE_PREADWRITE
		877	pthread_mutex_unlock (&preadwritelock);
		878	#endif
		879	pthread_mutex_unlock (&reslock);
		880	pthread_mutex_unlock (&reqlock);
		881	}
		882
		883	static void atfork_child (void)
		884	{
		885	aio_req prv;
		886
		887	started = 0;
		888
		889	while (reqs)
		890	{
		891	prv = reqs;
		892	reqs = prv->next;
		893	req_free (prv);
		894	}
		895
		896	reqs = reqe = 0;
		897
		898	while (ress)
		899	{
		900	prv = ress;
		901	ress = prv->next;
		902	req_free (prv);
		903	}
		904
		905	ress = rese = 0;
		906
		907	close (respipe [0]);
		908	close (respipe [1]);
		909	create_pipe ();
		910
		911	atfork_parent ();
		912	}
		913
509	#define dREQ \	914	#define dREQ \
510	aio_req req; \	915	aio_req req; \
511	\	916	\
512	if (SvOK (callback) && !SvROK (callback)) \	917	if (SvOK (callback) && !SvROK (callback)) \
513	croak ("clalback must be undef or of reference type"); \	918	croak ("callback must be undef or of reference type"); \
514	\	919	\
515	Newz (0, req, 1, aio_cb); \	920	Newz (0, req, 1, aio_cb); \
516	if (!req) \	921	if (!req) \
517	croak ("out of memory during aio_req allocation"); \	922	croak ("out of memory during aio_req allocation"); \
518	\	923	\
519	req->callback = newSVsv (callback);	924	req->callback = newSVsv (callback)
		925
		926	#define REQ_SEND \
		927	req_send (req); \
		928	\
		929	if (GIMME_V != G_VOID) \
		930	XPUSHs (req_sv (req, AIO_REQ_KLASS));
520		931
521	MODULE = IO::AIO PACKAGE = IO::AIO	932	MODULE = IO::AIO PACKAGE = IO::AIO
522		933
523	PROTOTYPES: ENABLE	934	PROTOTYPES: ENABLE
524		935
525	BOOT:	936	BOOT:
526	{	937	{
		938	HV *stash = gv_stashpv ("IO::AIO", 1);
		939	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		940	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		941	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		942
527	create_pipe ();	943	create_pipe ();
528	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	944	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
529	}	945	}
530		946
531	void	947	void
532	min_parallel(nthreads)	948	min_parallel (nthreads)
533	int nthreads	949	int nthreads
534	PROTOTYPE: $	950	PROTOTYPE: $
535		951
536	void	952	void
537	max_parallel(nthreads)	953	max_parallel (nthreads)
538	int nthreads	954	int nthreads
539	PROTOTYPE: $	955	PROTOTYPE: $
540		956
541	int	957	int
542	max_outstanding(nreqs)	958	max_outstanding (nreqs)
543	int nreqs	959	int nreqs
544	PROTOTYPE: $	960	PROTOTYPE: $
545	CODE:	961	CODE:
546	RETVAL = max_outstanding;	962	RETVAL = max_outstanding;
547	max_outstanding = nreqs;	963	max_outstanding = nreqs;
548		964
549	void	965	void
550	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	966	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
551	SV * pathname	967	SV * pathname
552	int flags	968	int flags
553	int mode	969	int mode
554	SV * callback	970	SV * callback
555	PROTOTYPE: $$$;$	971	PROTOTYPE: $$$;$
556	CODE:	972	PPCODE:
557	{	973	{
558	dREQ;	974	dREQ;
559		975
560	req->type = REQ_OPEN;	976	req->type = REQ_OPEN;
561	req->data = newSVsv (pathname);	977	req->data = newSVsv (pathname);
562	req->dataptr = SvPVbyte_nolen (req->data);	978	req->dataptr = SvPVbyte_nolen (req->data);
563	req->fd = flags;	979	req->fd = flags;
564	req->mode = mode;	980	req->mode = mode;
565		981
566	send_req (req);	982	REQ_SEND;
567	}	983	}
568		984
569	void	985	void
570	aio_close(fh,callback=&PL_sv_undef)	986	aio_close (fh,callback=&PL_sv_undef)
571	SV * fh	987	SV * fh
572	SV * callback	988	SV * callback
573	PROTOTYPE: $;$	989	PROTOTYPE: $;$
574	ALIAS:	990	ALIAS:
575	aio_close = REQ_CLOSE	991	aio_close = REQ_CLOSE
576	aio_fsync = REQ_FSYNC	992	aio_fsync = REQ_FSYNC
577	aio_fdatasync = REQ_FDATASYNC	993	aio_fdatasync = REQ_FDATASYNC
578	CODE:	994	PPCODE:
579	{	995	{
580	dREQ;	996	dREQ;
581		997
582	req->type = ix;	998	req->type = ix;
583	req->fh = newSVsv (fh);	999	req->fh = newSVsv (fh);
584	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1000	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
585		1001
586	send_req (req);	1002	REQ_SEND (req);
587	}	1003	}
588		1004
589	void	1005	void
590	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1006	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
591	SV * fh	1007	SV * fh
592	UV offset	1008	UV offset
593	IV length	1009	UV length
594	SV * data	1010	SV * data
595	IV dataoffset	1011	UV dataoffset
596	SV * callback	1012	SV * callback
597	ALIAS:	1013	ALIAS:
598	aio_read = REQ_READ	1014	aio_read = REQ_READ
599	aio_write = REQ_WRITE	1015	aio_write = REQ_WRITE
600	PROTOTYPE: $$$$$;$	1016	PROTOTYPE: $$$$$;$
601	CODE:	1017	PPCODE:
602	{	1018	{
603	aio_req req;	1019	aio_req req;
604	STRLEN svlen;	1020	STRLEN svlen;
605	char *svptr = SvPVbyte (data, svlen);	1021	char *svptr = SvPVbyte (data, svlen);
606		1022
…		…
644	{	1060	{
645	SvREADONLY_on (data);	1061	SvREADONLY_on (data);
646	req->data2ptr = (void *)data;	1062	req->data2ptr = (void *)data;
647	}	1063	}
648		1064
649	send_req (req);	1065	REQ_SEND;
650	}	1066	}
651	}	1067	}
652		1068
653	void	1069	void
		1070	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1071	SV * out_fh
		1072	SV * in_fh
		1073	UV in_offset
		1074	UV length
		1075	SV * callback
		1076	PROTOTYPE: $$$$;$
		1077	PPCODE:
		1078	{
		1079	dREQ;
		1080
		1081	req->type = REQ_SENDFILE;
		1082	req->fh = newSVsv (out_fh);
		1083	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1084	req->fh2 = newSVsv (in_fh);
		1085	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1086	req->offset = in_offset;
		1087	req->length = length;
		1088
		1089	REQ_SEND;
		1090	}
		1091
		1092	void
654	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1093	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
655	SV * fh	1094	SV * fh
656	UV offset	1095	UV offset
657	IV length	1096	IV length
658	SV * callback	1097	SV * callback
659	PROTOTYPE: $$$;$	1098	PROTOTYPE: $$$;$
660	CODE:	1099	PPCODE:
661	{	1100	{
662	dREQ;	1101	dREQ;
663		1102
664	req->type = REQ_READAHEAD;	1103	req->type = REQ_READAHEAD;
665	req->fh = newSVsv (fh);	1104	req->fh = newSVsv (fh);
666	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1105	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
667	req->offset = offset;	1106	req->offset = offset;
668	req->length = length;	1107	req->length = length;
669		1108
670	send_req (req);	1109	REQ_SEND;
671	}	1110	}
672		1111
673	void	1112	void
674	aio_stat(fh_or_path,callback=&PL_sv_undef)	1113	aio_stat (fh_or_path,callback=&PL_sv_undef)
675	SV * fh_or_path	1114	SV * fh_or_path
676	SV * callback	1115	SV * callback
677	ALIAS:	1116	ALIAS:
678	aio_stat = REQ_STAT	1117	aio_stat = REQ_STAT
679	aio_lstat = REQ_LSTAT	1118	aio_lstat = REQ_LSTAT
680	CODE:	1119	PPCODE:
681	{	1120	{
682	dREQ;	1121	dREQ;
683		1122
684	New (0, req->statdata, 1, Stat_t);	1123	New (0, req->statdata, 1, Stat_t);
685	if (!req->statdata)	1124	if (!req->statdata)
686	{	1125	{
687	free_req (req);	1126	req_free (req);
688	croak ("out of memory during aio_req->statdata allocation");	1127	croak ("out of memory during aio_req->statdata allocation");
689	}	1128	}
690		1129
691	if (SvPOK (fh_or_path))	1130	if (SvPOK (fh_or_path))
692	{	1131	{
…		…
699	req->type = REQ_FSTAT;	1138	req->type = REQ_FSTAT;
700	req->fh = newSVsv (fh_or_path);	1139	req->fh = newSVsv (fh_or_path);
701	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1140	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
702	}	1141	}
703		1142
704	send_req (req);	1143	REQ_SEND;
705	}	1144	}
706		1145
707	void	1146	void
708	aio_unlink(pathname,callback=&PL_sv_undef)	1147	aio_unlink (pathname,callback=&PL_sv_undef)
709	SV * pathname	1148	SV * pathname
710	SV * callback	1149	SV * callback
711	ALIAS:	1150	ALIAS:
712	aio_unlink = REQ_UNLINK	1151	aio_unlink = REQ_UNLINK
713	aio_rmdir = REQ_RMDIR	1152	aio_rmdir = REQ_RMDIR
		1153	aio_readdir = REQ_READDIR
714	CODE:	1154	PPCODE:
715	{	1155	{
716	dREQ;	1156	dREQ;
717		1157
718	req->type = ix;	1158	req->type = ix;
719	req->data = newSVsv (pathname);	1159	req->data = newSVsv (pathname);
720	req->dataptr = SvPVbyte_nolen (req->data);	1160	req->dataptr = SvPVbyte_nolen (req->data);
721		1161
722	send_req (req);	1162	REQ_SEND;
723	}	1163	}
724		1164
725	void	1165	void
726	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1166	aio_link (oldpath,newpath,callback=&PL_sv_undef)
727	SV * oldpath	1167	SV * oldpath
728	SV * newpath	1168	SV * newpath
729	SV * callback	1169	SV * callback
		1170	ALIAS:
		1171	aio_link = REQ_LINK
		1172	aio_symlink = REQ_SYMLINK
		1173	aio_rename = REQ_RENAME
730	CODE:	1174	PPCODE:
731	{	1175	{
732	dREQ;	1176	dREQ;
733		1177
734	req->type = REQ_SYMLINK;	1178	req->type = ix;
735	req->fh = newSVsv (oldpath);	1179	req->fh = newSVsv (oldpath);
736	req->data2ptr = SvPVbyte_nolen (req->fh);	1180	req->data2ptr = SvPVbyte_nolen (req->fh);
737	req->data = newSVsv (newpath);	1181	req->data = newSVsv (newpath);
738	req->dataptr = SvPVbyte_nolen (req->data);	1182	req->dataptr = SvPVbyte_nolen (req->data);
739		1183
740	send_req (req);	1184	REQ_SEND;
741	}	1185	}
742		1186
743	void	1187	void
		1188	aio_sleep (delay,callback=&PL_sv_undef)
		1189	double delay
		1190	SV * callback
		1191	PPCODE:
		1192	{
		1193	dREQ;
		1194
		1195	req->type = REQ_SLEEP;
		1196	req->fd = delay < 0. ? 0 : delay;
		1197	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1198
		1199	REQ_SEND;
		1200	}
		1201
		1202	void
		1203	aio_group (callback=&PL_sv_undef)
		1204	SV * callback
		1205	PROTOTYPE: ;$
		1206	PPCODE:
		1207	{
		1208	dREQ;
		1209	req->type = REQ_GROUP;
		1210	req_send (req);
		1211	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1212	}
		1213
		1214	void
744	flush()	1215	flush ()
745	PROTOTYPE:	1216	PROTOTYPE:
746	CODE:	1217	CODE:
747	while (nreqs)	1218	while (nreqs)
748	{	1219	{
749	poll_wait ();	1220	poll_wait ();
…		…
789	CODE:	1260	CODE:
790	RETVAL = nreqs;	1261	RETVAL = nreqs;
791	OUTPUT:	1262	OUTPUT:
792	RETVAL	1263	RETVAL
793		1264
		1265	PROTOTYPES: DISABLE
		1266
		1267	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1268
		1269	void
		1270	cancel (aio_req_ornot req)
		1271	PROTOTYPE:
		1272	CODE:
		1273	req_cancel (req);
		1274
		1275	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1276
		1277	void
		1278	add (aio_req grp, ...)
		1279	PPCODE:
		1280	{
		1281	int i;
		1282
		1283	if (grp->fd == 2)
		1284	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1285
		1286	for (i = 1; i < items; ++i )
		1287	{
		1288	if (GIMME_V != G_VOID)
		1289	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1290
		1291	aio_req req = SvAIO_REQ (ST (i));
		1292
		1293	if (req)
		1294	{
		1295	++grp->length;
		1296	req->grp = grp;
		1297
		1298	req->grp_prev = 0;
		1299	req->grp_next = grp->grp_first;
		1300
		1301	if (grp->grp_first)
		1302	grp->grp_first->grp_prev = req;
		1303
		1304	grp->grp_first = req;
		1305	}
		1306	}
		1307	}
		1308
		1309	void
		1310	lock (aio_req grp)
		1311	CODE:
		1312	++grp->length;
		1313
		1314	void
		1315	unlock (aio_req grp)
		1316	CODE:
		1317	aio_grp_dec (grp);
		1318
		1319	void
		1320	feeder_limit (aio_req grp, int limit)
		1321	CODE:
		1322	grp->fd2 = limit;
		1323	aio_grp_feed (grp);
		1324
		1325	void
		1326	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)
		1327	CODE:
		1328	{
		1329	SvREFCNT_dec (grp->fh2);
		1330	grp->fh2 = newSVsv (callback);
		1331
		1332	if (grp->fd2 <= 0)
		1333	grp->fd2 = 2;
		1334
		1335	aio_grp_feed (grp);
		1336	}
		1337

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.31 by root, Thu Aug 18 16:34:53 2005 UTC vs. Revision 1.50 by root, Sun Oct 22 21:13:47 2006 UTC

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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.31 by root, Thu Aug 18 16:34:53 2005 UTC vs.
Revision 1.50 by root, Sun Oct 22 21:13:47 2006 UTC