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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.10 by root, Wed Jul 13 00:13:09 2005 UTC vs.
Revision 1.45 by root, Sun Oct 22 00:19:05 2006 UTC

…		…
		1	#define _REENTRANT 1
		2	#include <errno.h>
		3
1	#include "EXTERN.h"	4	#include "EXTERN.h"
2	#include "perl.h"	5	#include "perl.h"
3	#include "XSUB.h"	6	#include "XSUB.h"
4		7
5	#define _XOPEN_SOURCE 500	8	#include "autoconf/config.h"
6		9
		10	#include <pthread.h>
		11
		12	#include <stddef.h>
		13	#include <errno.h>
		14	#include <sys/time.h>
		15	#include <sys/select.h>
7	#include <sys/types.h>	16	#include <sys/types.h>
8	#include <sys/stat.h>	17	#include <sys/stat.h>
9		18	#include <limits.h>
10	#include <unistd.h>	19	#include <unistd.h>
11	#include <fcntl.h>	20	#include <fcntl.h>
12	#include <signal.h>	21	#include <signal.h>
13	#include <sched.h>	22	#include <sched.h>
		23
		24	#if HAVE_SENDFILE
14	#if __linux	25	# if __linux
		26	# include <sys/sendfile.h>
		27	# elif __freebsd
15	#include <sys/syscall.h>	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
16	#endif	37	#endif
17		38
18	#include <pthread.h>	39	/* used for struct dirent, AIX doesn't provide it */
19		40	#ifndef NAME_MAX
20	typedef void InputStream; / hack, but 5.6.1 is simply toooo old ;) */	41	# define NAME_MAX 4096
21	typedef void OutputStream; / hack, but 5.6.1 is simply toooo old ;) */	42	#endif
22	typedef void InOutStream; / hack, but 5.6.1 is simply toooo old ;) */
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, REQ_UNLINK,	55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,	56	REQ_FSYNC, REQ_FDATASYNC,
		57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
		58	REQ_READDIR,
		59	REQ_LINK, REQ_SYMLINK,
		60	REQ_SLEEP,
		61	REQ_GROUP,
36	};	62	};
37		63
		64	#define AIO_REQ_KLASS "IO::AIO::REQ"
		65	#define AIO_GRP_KLASS "IO::AIO::GRP"
		66
38	typedef struct aio_cb {	67	typedef struct aio_cb
		68	{
		69	struct aio_cb grp, grp_prev, *grp_next;
		70
39	struct aio_cb *volatile next;	71	struct aio_cb *volatile next;
40		72
41	int type;	73	SV self; / the perl counterpart of this request, if any */
42		74
43	int fd;	75	SV data, callback;
		76	SV fh, fh2;
		77	void dataptr, data2ptr;
		78	Stat_t *statdata;
44	off_t offset;	79	off_t offset;
45	size_t length;	80	size_t length;
46	ssize_t result;	81	ssize_t result;
		82
		83	int type;
		84	int fd, fd2;
		85	int errorno;
		86	STRLEN dataoffset;
47	mode_t mode; /* open */	87	mode_t mode; /* open */
48	int errorno;	88	unsigned char cancelled;
49	SV data, callback;
50	void *dataptr;
51	STRLEN dataoffset;
52
53	Stat_t *statdata;
54	} aio_cb;	89	} aio_cb;
55		90
56	typedef aio_cb *aio_req;	91	typedef aio_cb *aio_req;
		92	typedef aio_cb *aio_req_ornot;
		93	typedef aio_cb *aio_group;
57		94
58	static int started;	95	static int started, wanted;
59	static int nreqs;	96	static volatile int nreqs;
60	static int max_outstanding = 1<<30;	97	static int max_outstanding = 1<<30;
61	static int respipe [2];	98	static int respipe [2];
62		99
63	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	100	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
64	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	101	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
65	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	102	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66		103
67	static volatile aio_req reqs, reqe; /* queue start, queue end */	104	static volatile aio_req reqs, reqe; /* queue start, queue end */
68	static volatile aio_req ress, rese; /* queue start, queue end */	105	static volatile aio_req ress, rese; /* queue start, queue end */
69		106
70	static void	107	static void req_free (aio_req req);
71	poll_wait ()	108
		109	/* must be called at most once */
		110	static SV req_sv (aio_req req, const char klass)
72	{	111	{
73	if (!nreqs)	112	req->self = (SV *)newHV ();
		113	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		114
		115	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		116	}
		117
		118	static aio_req SvAIO_REQ (SV *sv)
		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 ()
		129	{
		130	if (nreqs && !ress)
		131	{
		132	fd_set rfd;
		133	FD_ZERO(&rfd);
		134	FD_SET(respipe [0], &rfd);
		135
		136	select (respipe [0] + 1, &rfd, 0, 0, 0);
		137	}
		138	}
		139
		140	static void req_invoke (aio_req req)
		141	{
		142	dSP;
		143	int errorno = errno;
		144
		145	if (req->cancelled \|\| !SvOK (req->callback))
74	return;	146	return;
75		147
76	fd_set rfd;	148	errno = req->errorno;
77	FD_ZERO(&rfd);
78	FD_SET(respipe [0], &rfd);
79		149
80	select (respipe [0] + 1, &rfd, 0, 0, 0);	150	ENTER;
81	}	151	PUSHMARK (SP);
82		152
83	static int	153	switch (req->type)
84	poll_cb ()	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 ()
85	{	280	{
86	dSP;	281	dSP;
87	int count = 0;	282	int count = 0;
		283	int do_croak = 0;
88	aio_req req;	284	aio_req req;
89
90	{
91	/* read and signals sent by the worker threads */
92	char buf [32];
93	while (read (respipe [0], buf, 32) > 0)
94	;
95	}
96		285
97	for (;;)	286	for (;;)
98	{	287	{
99	pthread_mutex_lock (&reslock);	288	pthread_mutex_lock (&reslock);
100
101	req = ress;	289	req = ress;
102		290
103	if (ress)	291	if (req)
104	{	292	{
105	ress = ress->next;	293	ress = req->next;
		294
106	if (!ress) rese = 0;	295	if (!ress)
		296	{
		297	/* read any signals sent by the worker threads */
		298	char buf [32];
		299	while (read (respipe [0], buf, 32) == 32)
		300	;
		301
		302	rese = 0;
		303	}
107	}	304	}
108		305
109	pthread_mutex_unlock (&reslock);	306	pthread_mutex_unlock (&reslock);
110		307
111	if (!req)	308	if (!req)
113		310
114	nreqs--;	311	nreqs--;
115		312
116	if (req->type == REQ_QUIT)	313	if (req->type == REQ_QUIT)
117	started--;	314	started--;
		315	else if (req->type == REQ_GROUP && req->grp_next != req)
		316	continue;
118	else	317	else
119	{	318	{
120	int errorno = errno;
121	errno = req->errorno;
122
123	if (req->type == REQ_READ)	319	if (req->type == REQ_READ)
124	SvCUR_set (req->data, req->dataoffset	320	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
125	+ req->result > 0 ? req->result : 0);
126		321
		322	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
		323	SvREADONLY_off (req->data);
		324
127	if (req->data)	325	if (req->statdata)
128	SvREFCNT_dec (req->data);
129
130	if (req->type == REQ_STAT \|\| req->type == REQ_LSTAT \|\| req->type == REQ_FSTAT)
131	{	326	{
132	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	327	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
133	PL_laststatval = req->result;	328	PL_laststatval = req->result;
134	PL_statcache = *(req->statdata);	329	PL_statcache = *(req->statdata);
135
136	Safefree (req->statdata);
137	}	330	}
138		331
139	PUSHMARK (SP);	332	req_invoke (req);
140	XPUSHs (sv_2mortal (newSViv (req->result)));
141		333
142	if (req->type == REQ_OPEN)
143	{
144	/* convert fd to fh */
145	SV *fh;
146
147	PUTBACK;
148	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
149	SPAGAIN;
150
151	fh = POPs;
152
153	PUSHMARK (SP);
154	XPUSHs (fh);
155	}
156
157	if (SvOK (req->callback))
158	{
159	PUTBACK;
160	call_sv (req->callback, G_VOID \| G_EVAL);
161	SPAGAIN;
162	}
163
164	if (req->callback)
165	SvREFCNT_dec (req->callback);
166
167	errno = errorno;
168	count++;	334	count++;
169	}	335	}
170		336
171	Safefree (req);	337	req_free (req);
172	}	338	}
173		339
174	return count;	340	return count;
175	}	341	}
176		342
177	static void aio_proc(void arg);	343	static void aio_proc(void arg);
178		344
179	static void
180	start_thread (void)	345	static void start_thread (void)
181	{	346	{
182	sigset_t fullsigset, oldsigset;	347	sigset_t fullsigset, oldsigset;
183	pthread_t tid;	348	pthread_t tid;
184	pthread_attr_t attr;	349	pthread_attr_t attr;
185		350
…		…
194	started++;	359	started++;
195		360
196	sigprocmask (SIG_SETMASK, &oldsigset, 0);	361	sigprocmask (SIG_SETMASK, &oldsigset, 0);
197	}	362	}
198		363
199	static void	364	static void req_send (aio_req req)
200	send_req (aio_req req)
201	{	365	{
		366	while (started < wanted && nreqs >= started)
		367	start_thread ();
		368
202	nreqs++;	369	nreqs++;
203		370
204	pthread_mutex_lock (&reqlock);	371	pthread_mutex_lock (&reqlock);
205		372
206	req->next = 0;	373	req->next = 0;
…		…
214	reqe = reqs = req;	381	reqe = reqs = req;
215		382
216	pthread_cond_signal (&reqwait);	383	pthread_cond_signal (&reqwait);
217	pthread_mutex_unlock (&reqlock);	384	pthread_mutex_unlock (&reqlock);
218		385
219	while (nreqs > max_outstanding)	386	if (nreqs > max_outstanding)
		387	for (;;)
		388	{
		389	poll_cb ();
		390
		391	if (nreqs <= max_outstanding)
		392	break;
		393
		394	poll_wait ();
		395	}
		396	}
		397
		398	static void end_thread (void)
		399	{
		400	aio_req req;
		401	Newz (0, req, 1, aio_cb);
		402	req->type = REQ_QUIT;
		403
		404	req_send (req);
		405	}
		406
		407	static void min_parallel (int nthreads)
		408	{
		409	if (wanted < nthreads)
		410	wanted = nthreads;
		411	}
		412
		413	static void max_parallel (int nthreads)
		414	{
		415	int cur = started;
		416
		417	if (wanted > nthreads)
		418	wanted = nthreads;
		419
		420	while (cur > wanted)
		421	{
		422	end_thread ();
		423	cur--;
		424	}
		425
		426	while (started > wanted)
220	{	427	{
221	poll_wait ();	428	poll_wait ();
222	poll_cb ();	429	poll_cb ();
223	}	430	}
224	}	431	}
225		432
226	static void	433	static void create_pipe ()
227	end_thread (void)
228	{	434	{
229	aio_req req;	435	if (pipe (respipe))
230	New (0, req, 1, aio_cb);	436	croak ("unable to initialize result pipe");
231	req->type = REQ_QUIT;
232		437
233	send_req (req);	438	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
234	}	439	croak ("cannot set result pipe to nonblocking mode");
235		440
236	static void	441	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
237	read_write (int dowrite, int fd, off_t offset, size_t length,	442	croak ("cannot set result pipe to nonblocking mode");
238	SV data, STRLEN dataoffset, SV callback)	443	}
239	{
240	aio_req req;
241	STRLEN svlen;
242	char *svptr = SvPV (data, svlen);
243		444
244	SvUPGRADE (data, SVt_PV);	445	/*****************************************************************************/
245	SvPOK_on (data);	446	/* work around various missing functions */
246		447
247	if (dataoffset < 0)	448	#if !HAVE_PREADWRITE
		449	# define pread aio_pread
		450	# define pwrite aio_pwrite
		451
		452	/*
		453	* make our pread/pwrite safe against themselves, but not against
		454	* normal read/write by using a mutex. slows down execution a lot,
		455	* but that's your problem, not mine.
		456	*/
		457	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
		458
		459	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
		460	{
		461	ssize_t res;
		462	off_t ooffset;
		463
		464	pthread_mutex_lock (&preadwritelock);
		465	ooffset = lseek (fd, 0, SEEK_CUR);
		466	lseek (fd, offset, SEEK_SET);
		467	res = read (fd, buf, count);
		468	lseek (fd, ooffset, SEEK_SET);
		469	pthread_mutex_unlock (&preadwritelock);
		470
		471	return res;
		472	}
		473
		474	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
		475	{
		476	ssize_t res;
		477	off_t ooffset;
		478
		479	pthread_mutex_lock (&preadwritelock);
		480	ooffset = lseek (fd, 0, SEEK_CUR);
		481	lseek (fd, offset, SEEK_SET);
		482	res = write (fd, buf, count);
		483	lseek (fd, offset, SEEK_SET);
		484	pthread_mutex_unlock (&preadwritelock);
		485
		486	return res;
		487	}
		488	#endif
		489
		490	#if !HAVE_FDATASYNC
		491	# define fdatasync fsync
		492	#endif
		493
		494	#if !HAVE_READAHEAD
		495	# define readahead aio_readahead
		496
		497	static ssize_t readahead (int fd, off_t offset, size_t count)
		498	{
		499	char readahead_buf[4096];
		500
		501	while (count > 0)
		502	{
		503	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
		504
		505	pread (fd, readahead_buf, len, offset);
248	dataoffset += svlen;	506	offset += len;
249		507	count -= len;
250	if (dataoffset < 0 \|\| dataoffset > svlen)
251	croak ("data offset outside of string");
252
253	if (dowrite)
254	{	508	}
255	/* write: check length and adjust. */	509
256	if (length < 0 \|\| length + dataoffset > svlen)	510	errno = 0;
257	length = svlen - dataoffset;	511	}
		512	#endif
		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);
258	}	533	}
259	else	534	else
		535	*res = 0;
		536
		537	pthread_mutex_unlock (&readdirlock);
		538
		539	errno = errorno;
		540	return e ? 0 : -1;
		541	}
		542	#endif
		543
		544	/* sendfile always needs emulation */
		545	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
		546	{
		547	ssize_t res;
		548
		549	if (!count)
		550	return 0;
		551
		552	#if HAVE_SENDFILE
		553	# if __linux
		554	res = sendfile (ofd, ifd, &offset, count);
		555
		556	# elif __freebsd
		557	/*
		558	* Of course, the freebsd sendfile is a dire hack with no thoughts
		559	* wasted on making it similar to other I/O functions.
		560	*/
260	{	561	{
261	/* read: grow scalar as necessary */	562	off_t sbytes;
262	svptr = SvGROW (data, length + dataoffset);	563	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		564
		565	if (res < 0 && sbytes)
		566	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
		567	res = sbytes;
		568	}
		569
		570	# elif __hpux
		571	res = sendfile (ofd, ifd, offset, count, 0, 0);
		572
		573	# elif __solaris
		574	{
		575	struct sendfilevec vec;
		576	size_t sbytes;
		577
		578	vec.sfv_fd = ifd;
		579	vec.sfv_flag = 0;
		580	vec.sfv_off = offset;
		581	vec.sfv_len = count;
		582
		583	res = sendfilev (ofd, &vec, 1, &sbytes);
		584
		585	if (res < 0 && sbytes)
		586	res = sbytes;
		587	}
		588
		589	# endif
		590	#else
		591	res = -1;
		592	errno = ENOSYS;
		593	#endif
		594
		595	if (res < 0
		596	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK
		597	#if __solaris
		598	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE
		599	#endif
		600	)
		601	)
263	}	602	{
		603	/* emulate sendfile. this is a major pain in the ass */
		604	char buf[4096];
		605	res = 0;
264		606
265	if (length < 0)	607	while (count)
266	croak ("length must not be negative");	608	{
		609	ssize_t cnt;
		610
		611	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
267		612
268	Newz (0, req, 1, aio_cb);	613	if (cnt <= 0)
		614	{
		615	if (cnt && !res) res = -1;
		616	break;
		617	}
269		618
		619	cnt = write (ofd, buf, cnt);
		620
		621	if (cnt <= 0)
		622	{
		623	if (cnt && !res) res = -1;
		624	break;
		625	}
		626
		627	offset += cnt;
		628	res += cnt;
		629	count -= cnt;
		630	}
		631	}
		632
		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
270	if (!req)	652	if (!dirp)
271	croak ("out of memory during aio_req allocation");	653	return -1;
272		654
273	req->type = dowrite ? REQ_WRITE : REQ_READ;	655	names = malloc (memlen);
274	req->fd = fd;
275	req->offset = offset;
276	req->length = length;
277	req->data = SvREFCNT_inc (data);
278	req->dataptr = (char *)svptr + dataoffset;
279	req->callback = SvREFCNT_inc (callback);
280		656
281	send_req (req);	657	for (;;)
282	}	658	{
		659	errno = 0, readdir_r (dirp, &u.d, &entp);
283		660
284	static void *	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;
		697	}
		698
		699	/*****************************************************************************/
		700
285	aio_proc (void *thr_arg)	701	static void aio_proc (void thr_arg)
286	{	702	{
287	aio_req req;	703	aio_req req;
288	int type;	704	int type;
289		705
290	do	706	do
…		…
309		725
310	pthread_mutex_unlock (&reqlock);	726	pthread_mutex_unlock (&reqlock);
311		727
312	errno = 0; /* strictly unnecessary */	728	errno = 0; /* strictly unnecessary */
313		729
314	type = req->type;	730	if (!req->cancelled)
315
316	switch (type)	731	switch (req->type)
317	{	732	{
318	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;
319	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;
320	#if SYS_readahead	735
321	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;
322	#else	737	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
323	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
324	#endif
325		738
326	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	739	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
327	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	740	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
328	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	741	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
329		742
330	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;
331	case REQ_CLOSE: req->result = close (req->fd); break;	744	case REQ_CLOSE: req->result = close (req->fd); break;
332	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	745	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
333
334	case REQ_FSYNC: req->result = fsync (req->fd); 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;
		749	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		750
335	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	751	case REQ_FDATASYNC: req->result = fdatasync (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;
336		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
337	case REQ_QUIT:	765	case REQ_QUIT:
338	break;	766	break;
339		767
340	default:	768	default:
341	req->result = ENOSYS;	769	req->result = ENOSYS;
342	break;	770	break;
343	}	771	}
344		772
345	req->errorno = errno;	773	req->errorno = errno;
346		774
347	pthread_mutex_lock (&reslock);	775	pthread_mutex_lock (&reslock);
348		776
…		…
366	while (type != REQ_QUIT);	794	while (type != REQ_QUIT);
367		795
368	return 0;	796	return 0;
369	}	797	}
370		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
		856	#define dREQ \
		857	aio_req req; \
		858	\
		859	if (SvOK (callback) && !SvROK (callback)) \
		860	croak ("callback must be undef or of reference type"); \
		861	\
		862	Newz (0, req, 1, aio_cb); \
		863	if (!req) \
		864	croak ("out of memory during aio_req allocation"); \
		865	\
		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));
		873
371	MODULE = IO::AIO PACKAGE = IO::AIO	874	MODULE = IO::AIO PACKAGE = IO::AIO
372		875
373	PROTOTYPES: ENABLE	876	PROTOTYPES: ENABLE
374		877
375	BOOT:	878	BOOT:
376	{	879	{
377	if (pipe (respipe))	880	HV *stash = gv_stashpv ("IO::AIO", 1);
378	croak ("unable to initialize result pipe");	881	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		882	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		883	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
379		884
380	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	885	create_pipe ();
381	croak ("cannot set result pipe to nonblocking mode");	886	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
382
383	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
384	croak ("cannot set result pipe to nonblocking mode");
385	}	887	}
386		888
387	void	889	void
388	min_parallel(nthreads)	890	min_parallel (nthreads)
389	int nthreads	891	int nthreads
390	PROTOTYPE: $	892	PROTOTYPE: $
391	CODE:
392	while (nthreads > started)
393	start_thread ();
394		893
395	void	894	void
396	max_parallel(nthreads)	895	max_parallel (nthreads)
397	int nthreads	896	int nthreads
398	PROTOTYPE: $	897	PROTOTYPE: $
399	CODE:
400	{
401	int cur = started;
402	while (cur > nthreads)
403	{
404	end_thread ();
405	cur--;
406	}
407
408	while (started > nthreads)
409	{
410	poll_wait ();
411	poll_cb ();
412	}
413	}
414		898
415	int	899	int
416	max_outstanding(nreqs)	900	max_outstanding (nreqs)
417	int nreqs	901	int nreqs
418	PROTOTYPE: $	902	PROTOTYPE: $
419	CODE:	903	CODE:
420	RETVAL = max_outstanding;	904	RETVAL = max_outstanding;
421	max_outstanding = nreqs;	905	max_outstanding = nreqs;
422		906
423	void	907	void
424	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	908	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
425	SV * pathname	909	SV * pathname
426	int flags	910	int flags
427	int mode	911	int mode
428	SV * callback	912	SV * callback
429	PROTOTYPE: $$$;$	913	PROTOTYPE: $$$;$
430	CODE:	914	PPCODE:
431	{	915	{
432	aio_req req;	916	dREQ;
433
434	Newz (0, req, 1, aio_cb);
435
436	if (!req)
437	croak ("out of memory during aio_req allocation");
438		917
439	req->type = REQ_OPEN;	918	req->type = REQ_OPEN;
440	req->data = newSVsv (pathname);	919	req->data = newSVsv (pathname);
441	req->dataptr = SvPV_nolen (req->data);	920	req->dataptr = SvPVbyte_nolen (req->data);
442	req->fd = flags;	921	req->fd = flags;
443	req->mode = mode;	922	req->mode = mode;
444	req->callback = SvREFCNT_inc (callback);
445		923
446	send_req (req);	924	REQ_SEND;
447	}	925	}
448		926
449	void	927	void
450	aio_close(fh,callback=&PL_sv_undef)	928	aio_close (fh,callback=&PL_sv_undef)
451	InputStream fh	929	SV * fh
452	SV * callback	930	SV * callback
453	PROTOTYPE: $;$	931	PROTOTYPE: $;$
454	ALIAS:	932	ALIAS:
455	aio_close = REQ_CLOSE	933	aio_close = REQ_CLOSE
456	aio_fsync = REQ_FSYNC	934	aio_fsync = REQ_FSYNC
457	aio_fdatasync = REQ_FDATASYNC	935	aio_fdatasync = REQ_FDATASYNC
458	CODE:	936	PPCODE:
		937	{
		938	dREQ;
		939
		940	req->type = ix;
		941	req->fh = newSVsv (fh);
		942	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
		943
		944	REQ_SEND (req);
		945	}
		946
		947	void
		948	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
		949	SV * fh
		950	UV offset
		951	UV length
		952	SV * data
		953	UV dataoffset
		954	SV * callback
		955	ALIAS:
		956	aio_read = REQ_READ
		957	aio_write = REQ_WRITE
		958	PROTOTYPE: $$$$$;$
		959	PPCODE:
459	{	960	{
460	aio_req req;	961	aio_req req;
		962	STRLEN svlen;
		963	char *svptr = SvPVbyte (data, svlen);
461		964
462	Newz (0, req, 1, aio_cb);	965	SvUPGRADE (data, SVt_PV);
		966	SvPOK_on (data);
463		967
464	if (!req)	968	if (dataoffset < 0)
465	croak ("out of memory during aio_req allocation");	969	dataoffset += svlen;
466		970
467	req->type = ix;	971	if (dataoffset < 0 \|\| dataoffset > svlen)
468	req->fd = PerlIO_fileno (fh);	972	croak ("data offset outside of string");
469	req->callback = SvREFCNT_inc (callback);
470		973
471	send_req (req);	974	if (ix == REQ_WRITE)
472	}	975	{
473		976	/* write: check length and adjust. */
474	void	977	if (length < 0 \|\| length + dataoffset > svlen)
475	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	978	length = svlen - dataoffset;
476	InputStream fh	979	}
477	UV offset	980	else
478	IV length	981	{
479	SV * data	982	/* read: grow scalar as necessary */
480	IV dataoffset	983	svptr = SvGROW (data, length + dataoffset);
481	SV * callback	984	}
482	PROTOTYPE: $$$$$;$
483	CODE:
484	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
485
486	void
487	aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
488	OutputStream fh
489	UV offset
490	IV length
491	SV * data
492	IV dataoffset
493	SV * callback
494	PROTOTYPE: $$$$$;$
495	CODE:
496	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
497
498	void
499	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
500	InputStream fh
501	UV offset
502	IV length
503	SV * callback
504	PROTOTYPE: $$$;$
505	CODE:
506	{
507	aio_req req;
508		985
509	if (length < 0)	986	if (length < 0)
510	croak ("length must not be negative");	987	croak ("length must not be negative");
511		988
512	Newz (0, req, 1, aio_cb);	989	{
		990	dREQ;
513		991
514	if (!req)	992	req->type = ix;
515	croak ("out of memory during aio_req allocation");	993	req->fh = newSVsv (fh);
		994	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
		995	: IoOFP (sv_2io (fh)));
		996	req->offset = offset;
		997	req->length = length;
		998	req->data = SvREFCNT_inc (data);
		999	req->dataptr = (char *)svptr + dataoffset;
		1000
		1001	if (!SvREADONLY (data))
		1002	{
		1003	SvREADONLY_on (data);
		1004	req->data2ptr = (void *)data;
		1005	}
		1006
		1007	REQ_SEND;
		1008	}
		1009	}
		1010
		1011	void
		1012	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1013	SV * out_fh
		1014	SV * in_fh
		1015	UV in_offset
		1016	UV length
		1017	SV * callback
		1018	PROTOTYPE: $$$$;$
		1019	PPCODE:
		1020	{
		1021	dREQ;
		1022
		1023	req->type = REQ_SENDFILE;
		1024	req->fh = newSVsv (out_fh);
		1025	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1026	req->fh2 = newSVsv (in_fh);
		1027	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1028	req->offset = in_offset;
		1029	req->length = length;
		1030
		1031	REQ_SEND;
		1032	}
		1033
		1034	void
		1035	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
		1036	SV * fh
		1037	UV offset
		1038	IV length
		1039	SV * callback
		1040	PROTOTYPE: $$$;$
		1041	PPCODE:
		1042	{
		1043	dREQ;
516		1044
517	req->type = REQ_READAHEAD;	1045	req->type = REQ_READAHEAD;
		1046	req->fh = newSVsv (fh);
518	req->fd = PerlIO_fileno (fh);	1047	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
519	req->offset = offset;	1048	req->offset = offset;
520	req->length = length;	1049	req->length = length;
521	req->callback = SvREFCNT_inc (callback);
522		1050
523	send_req (req);	1051	REQ_SEND;
524	}	1052	}
525		1053
526	void	1054	void
527	aio_stat(fh_or_path,callback=&PL_sv_undef)	1055	aio_stat (fh_or_path,callback=&PL_sv_undef)
528	SV * fh_or_path	1056	SV * fh_or_path
529	SV * callback	1057	SV * callback
530	ALIAS:	1058	ALIAS:
531	aio_stat = REQ_STAT	1059	aio_stat = REQ_STAT
532	aio_lstat = REQ_LSTAT	1060	aio_lstat = REQ_LSTAT
533	CODE:	1061	PPCODE:
534	{	1062	{
535	aio_req req;	1063	dREQ;
536
537	Newz (0, req, 1, aio_cb);
538
539	if (!req)
540	croak ("out of memory during aio_req allocation");
541		1064
542	New (0, req->statdata, 1, Stat_t);	1065	New (0, req->statdata, 1, Stat_t);
543
544	if (!req->statdata)	1066	if (!req->statdata)
		1067	{
		1068	req_free (req);
545	croak ("out of memory during aio_req->statdata allocation");	1069	croak ("out of memory during aio_req->statdata allocation");
		1070	}
546		1071
547	if (SvPOK (fh_or_path))	1072	if (SvPOK (fh_or_path))
548	{	1073	{
549	req->type = ix;	1074	req->type = ix;
550	req->data = newSVsv (fh_or_path);	1075	req->data = newSVsv (fh_or_path);
551	req->dataptr = SvPV_nolen (req->data);	1076	req->dataptr = SvPVbyte_nolen (req->data);
552	}	1077	}
553	else	1078	else
554	{	1079	{
555	req->type = REQ_FSTAT;	1080	req->type = REQ_FSTAT;
		1081	req->fh = newSVsv (fh_or_path);
556	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1082	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
557	}	1083	}
558		1084
559	req->callback = SvREFCNT_inc (callback);	1085	REQ_SEND;
560
561	send_req (req);
562	}	1086	}
563		1087
564	void	1088	void
565	aio_unlink(pathname,callback=&PL_sv_undef)	1089	aio_unlink (pathname,callback=&PL_sv_undef)
566	SV * pathname	1090	SV * pathname
567	SV * callback	1091	SV * callback
		1092	ALIAS:
		1093	aio_unlink = REQ_UNLINK
		1094	aio_rmdir = REQ_RMDIR
		1095	aio_readdir = REQ_READDIR
568	CODE:	1096	PPCODE:
569	{	1097	{
570	aio_req req;	1098	dREQ;
571		1099
572	Newz (0, req, 1, aio_cb);	1100	req->type = ix;
		1101	req->data = newSVsv (pathname);
		1102	req->dataptr = SvPVbyte_nolen (req->data);
573		1103
574	if (!req)	1104	REQ_SEND;
575	croak ("out of memory during aio_req allocation");	1105	}
		1106
		1107	void
		1108	aio_link (oldpath,newpath,callback=&PL_sv_undef)
		1109	SV * oldpath
		1110	SV * newpath
		1111	SV * callback
		1112	ALIAS:
		1113	aio_link = REQ_LINK
		1114	aio_symlink = REQ_SYMLINK
		1115	aio_rename = REQ_RENAME
		1116	PPCODE:
		1117	{
		1118	dREQ;
576		1119
577	req->type = REQ_UNLINK;	1120	req->type = ix;
		1121	req->fh = newSVsv (oldpath);
		1122	req->data2ptr = SvPVbyte_nolen (req->fh);
578	req->data = newSVsv (pathname);	1123	req->data = newSVsv (newpath);
579	req->dataptr = SvPV_nolen (req->data);	1124	req->dataptr = SvPVbyte_nolen (req->data);
580	req->callback = SvREFCNT_inc (callback);
581		1125
582	send_req (req);	1126	REQ_SEND;
583	}	1127	}
584		1128
585	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
586	flush()	1160	flush ()
587	PROTOTYPE:	1161	PROTOTYPE:
588	CODE:	1162	CODE:
589	while (nreqs)	1163	while (nreqs)
590	{	1164	{
591	poll_wait ();	1165	poll_wait ();
…		…
631	CODE:	1205	CODE:
632	RETVAL = nreqs;	1206	RETVAL = nreqs;
633	OUTPUT:	1207	OUTPUT:
634	RETVAL	1208	RETVAL
635		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 1.10 by root, Wed Jul 13 00:13:09 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 1.10 by root, Wed Jul 13 00:13:09 2005 UTC vs.
Revision 1.45 by root, Sun Oct 22 00:19:05 2006 UTC