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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.8 by root, Mon Jul 11 02:53:59 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
		8	#include "autoconf/config.h"
		9
		10	#include <pthread.h>
		11
		12	#include <stddef.h>
		13	#include <errno.h>
		14	#include <sys/time.h>
		15	#include <sys/select.h>
5	#include <sys/types.h>	16	#include <sys/types.h>
6	#include <sys/stat.h>	17	#include <sys/stat.h>
		18	#include <limits.h>
7	#include <unistd.h>	19	#include <unistd.h>
8	#include <fcntl.h>	20	#include <fcntl.h>
9	#include <signal.h>	21	#include <signal.h>
10	#include <sched.h>	22	#include <sched.h>
11	#include <endian.h>
12		23
13	#include <pthread.h>	24	#if HAVE_SENDFILE
		25	# if __linux
		26	# include <sys/sendfile.h>
		27	# elif __freebsd
14	#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
		37	#endif
15		38
16	typedef void InputStream; / hack, but 5.6.1 is simply toooo old ;) */	39	/* used for struct dirent, AIX doesn't provide it */
17	typedef void OutputStream; / hack, but 5.6.1 is simply toooo old ;) */	40	#ifndef NAME_MAX
18	typedef void InOutStream; / hack, but 5.6.1 is simply toooo old ;) */	41	# define NAME_MAX 4096
		42	#endif
19		43
20	#if __ia64	44	#if __ia64
21	# define STACKSIZE 65536	45	# define STACKSIZE 65536
22	#else	46	#else
23	# define STACKSIZE 4096	47	# define STACKSIZE 8192
24	#endif	48	#endif
25		49
26	enum {	50	enum {
27	REQ_QUIT,	51	REQ_QUIT,
28	REQ_OPEN, REQ_CLOSE,	52	REQ_OPEN, REQ_CLOSE,
29	REQ_READ, REQ_WRITE, REQ_READAHEAD,	53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		54	REQ_SENDFILE,
30	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,	55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
31	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,
32	};	62	};
33		63
		64	#define AIO_REQ_KLASS "IO::AIO::REQ"
		65	#define AIO_GRP_KLASS "IO::AIO::GRP"
		66
34	typedef struct aio_cb {	67	typedef struct aio_cb
		68	{
		69	struct aio_cb grp, grp_prev, *grp_next;
		70
35	struct aio_cb *volatile next;	71	struct aio_cb *volatile next;
36		72
37	int type;	73	SV self; / the perl counterpart of this request, if any */
38		74
39	int fd;	75	SV data, callback;
		76	SV fh, fh2;
		77	void dataptr, data2ptr;
		78	Stat_t *statdata;
40	off_t offset;	79	off_t offset;
41	size_t length;	80	size_t length;
42	ssize_t result;	81	ssize_t result;
		82
		83	int type;
		84	int fd, fd2;
		85	int errorno;
		86	STRLEN dataoffset;
43	mode_t mode; /* open */	87	mode_t mode; /* open */
44	int errorno;	88	unsigned char cancelled;
45	SV data, callback;
46	void *dataptr;
47	STRLEN dataoffset;
48
49	Stat_t *statdata;
50	} aio_cb;	89	} aio_cb;
51		90
52	typedef aio_cb *aio_req;	91	typedef aio_cb *aio_req;
		92	typedef aio_cb *aio_req_ornot;
		93	typedef aio_cb *aio_group;
53		94
54	static int started;	95	static int started, wanted;
55	static int nreqs;	96	static volatile int nreqs;
56	static int max_outstanding = 1<<30;	97	static int max_outstanding = 1<<30;
57	static int respipe [2];	98	static int respipe [2];
58		99
59	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	100	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
60	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	101	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
61	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	102	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
62		103
63	static volatile aio_req reqs, reqe; /* queue start, queue end */	104	static volatile aio_req reqs, reqe; /* queue start, queue end */
64	static volatile aio_req ress, rese; /* queue start, queue end */	105	static volatile aio_req ress, rese; /* queue start, queue end */
65		106
66	static void	107	static void req_free (aio_req req);
67	poll_wait ()	108
		109	/* must be called at most once */
		110	static SV req_sv (aio_req req, const char klass)
68	{	111	{
69	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))
70	return;	146	return;
71		147
72	fd_set rfd;	148	errno = req->errorno;
73	FD_ZERO(&rfd);
74	FD_SET(respipe [0], &rfd);
75		149
76	select (respipe [0] + 1, &rfd, 0, 0, 0);	150	ENTER;
77	}	151	PUSHMARK (SP);
78		152
79	static int	153	switch (req->type)
80	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 ()
81	{	280	{
82	dSP;	281	dSP;
83	int count = 0;	282	int count = 0;
		283	int do_croak = 0;
84	aio_req req;	284	aio_req req;
85
86	{
87	/* read and signals sent by the worker threads */
88	char buf [32];
89	while (read (respipe [0], buf, 32) > 0)
90	;
91	}
92		285
93	for (;;)	286	for (;;)
94	{	287	{
95	pthread_mutex_lock (&reslock);	288	pthread_mutex_lock (&reslock);
96
97	req = ress;	289	req = ress;
98		290
99	if (ress)	291	if (req)
100	{	292	{
101	ress = ress->next;	293	ress = req->next;
		294
102	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	}
103	}	304	}
104		305
105	pthread_mutex_unlock (&reslock);	306	pthread_mutex_unlock (&reslock);
106		307
107	if (!req)	308	if (!req)
109		310
110	nreqs--;	311	nreqs--;
111		312
112	if (req->type == REQ_QUIT)	313	if (req->type == REQ_QUIT)
113	started--;	314	started--;
		315	else if (req->type == REQ_GROUP && req->grp_next != req)
		316	continue;
114	else	317	else
115	{	318	{
116	int errorno = errno;
117	errno = req->errorno;
118
119	if (req->type == REQ_READ)	319	if (req->type == REQ_READ)
120	SvCUR_set (req->data, req->dataoffset	320	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
121	+ req->result > 0 ? req->result : 0);
122		321
		322	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
		323	SvREADONLY_off (req->data);
		324
123	if (req->data)	325	if (req->statdata)
124	SvREFCNT_dec (req->data);
125
126	if (req->type == REQ_STAT \|\| req->type == REQ_LSTAT \|\| req->type == REQ_FSTAT)
127	{	326	{
128	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	327	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
129	PL_laststatval = req->result;	328	PL_laststatval = req->result;
130	PL_statcache = *(req->statdata);	329	PL_statcache = *(req->statdata);
131
132	Safefree (req->statdata);
133	}	330	}
134		331
135	PUSHMARK (SP);	332	req_invoke (req);
136	XPUSHs (sv_2mortal (newSViv (req->result)));
137		333
138	if (req->type == REQ_OPEN)
139	{
140	/* convert fd to fh */
141	SV *fh;
142
143	PUTBACK;
144	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
145	SPAGAIN;
146
147	fh = POPs;
148
149	PUSHMARK (SP);
150	XPUSHs (fh);
151	}
152
153	if (SvOK (req->callback))
154	{
155	PUTBACK;
156	call_sv (req->callback, G_VOID \| G_EVAL);
157	SPAGAIN;
158	}
159
160	if (req->callback)
161	SvREFCNT_dec (req->callback);
162
163	errno = errorno;
164	count++;	334	count++;
165	}	335	}
166		336
167	Safefree (req);	337	req_free (req);
168	}	338	}
169		339
170	return count;	340	return count;
171	}	341	}
172		342
173	static void aio_proc(void arg);	343	static void aio_proc(void arg);
174		344
175	static void
176	start_thread (void)	345	static void start_thread (void)
177	{	346	{
178	sigset_t fullsigset, oldsigset;	347	sigset_t fullsigset, oldsigset;
179	pthread_t tid;	348	pthread_t tid;
180	pthread_attr_t attr;	349	pthread_attr_t attr;
181		350
…		…
190	started++;	359	started++;
191		360
192	sigprocmask (SIG_SETMASK, &oldsigset, 0);	361	sigprocmask (SIG_SETMASK, &oldsigset, 0);
193	}	362	}
194		363
195	static void	364	static void req_send (aio_req req)
196	send_req (aio_req req)
197	{	365	{
		366	while (started < wanted && nreqs >= started)
		367	start_thread ();
		368
198	nreqs++;	369	nreqs++;
199		370
200	pthread_mutex_lock (&reqlock);	371	pthread_mutex_lock (&reqlock);
201		372
202	req->next = 0;	373	req->next = 0;
…		…
210	reqe = reqs = req;	381	reqe = reqs = req;
211		382
212	pthread_cond_signal (&reqwait);	383	pthread_cond_signal (&reqwait);
213	pthread_mutex_unlock (&reqlock);	384	pthread_mutex_unlock (&reqlock);
214		385
215	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)
216	{	427	{
217	poll_wait ();	428	poll_wait ();
218	poll_cb ();	429	poll_cb ();
219	}	430	}
220	}	431	}
221		432
222	static void	433	static void create_pipe ()
223	end_thread (void)
224	{	434	{
225	aio_req req;	435	if (pipe (respipe))
226	New (0, req, 1, aio_cb);	436	croak ("unable to initialize result pipe");
227	req->type = REQ_QUIT;
228		437
229	send_req (req);	438	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
230	}	439	croak ("cannot set result pipe to nonblocking mode");
231		440
232	static void	441	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
233	read_write (int dowrite, int fd, off_t offset, size_t length,	442	croak ("cannot set result pipe to nonblocking mode");
234	SV data, STRLEN dataoffset, SV callback)	443	}
235	{
236	aio_req req;
237	STRLEN svlen;
238	char *svptr = SvPV (data, svlen);
239		444
240	SvUPGRADE (data, SVt_PV);	445	/*****************************************************************************/
241	SvPOK_on (data);	446	/* work around various missing functions */
242		447
243	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);
244	dataoffset += svlen;	506	offset += len;
245		507	count -= len;
246	if (dataoffset < 0 \|\| dataoffset > svlen)
247	croak ("data offset outside of string");
248
249	if (dowrite)
250	{	508	}
251	/* write: check length and adjust. */	509
252	if (length < 0 \|\| length + dataoffset > svlen)	510	errno = 0;
253	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);
254	}	533	}
255	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	*/
256	{	561	{
257	/* read: grow scalar as necessary */	562	off_t sbytes;
258	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	)
259	}	602	{
		603	/* emulate sendfile. this is a major pain in the ass */
		604	char buf[4096];
		605	res = 0;
260		606
261	if (length < 0)	607	while (count)
262	croak ("length must not be negative");	608	{
		609	ssize_t cnt;
		610
		611	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
263		612
264	Newz (0, req, 1, aio_cb);	613	if (cnt <= 0)
		614	{
		615	if (cnt && !res) res = -1;
		616	break;
		617	}
265		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
266	if (!req)	652	if (!dirp)
267	croak ("out of memory during aio_req allocation");	653	return -1;
268		654
269	req->type = dowrite ? REQ_WRITE : REQ_READ;	655	names = malloc (memlen);
270	req->fd = fd;
271	req->offset = offset;
272	req->length = length;
273	req->data = SvREFCNT_inc (data);
274	req->dataptr = (char *)svptr + dataoffset;
275	req->callback = SvREFCNT_inc (callback);
276		656
277	send_req (req);	657	for (;;)
278	}	658	{
		659	errno = 0, readdir_r (dirp, &u.d, &entp);
279		660
280	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
281	aio_proc (void *thr_arg)	701	static void aio_proc (void thr_arg)
282	{	702	{
283	aio_req req;	703	aio_req req;
284	int type;	704	int type;
285		705
286	do	706	do
…		…
305		725
306	pthread_mutex_unlock (&reqlock);	726	pthread_mutex_unlock (&reqlock);
307		727
308	errno = 0; /* strictly unnecessary */	728	errno = 0; /* strictly unnecessary */
309		729
310	type = req->type;	730	if (!req->cancelled)
311
312	switch (type)	731	switch (req->type)
313	{	732	{
314	case REQ_READ: req->result = pread64 (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;
315	case REQ_WRITE: req->result = pwrite64 (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;
316	#if SYS_readahead	735
317	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;
318	#else	737	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
319	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
320	#endif
321		738
322	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	739	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
323	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	740	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
324	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	741	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
325		742
326	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;
327	case REQ_CLOSE: req->result = close (req->fd); break;	744	case REQ_CLOSE: req->result = close (req->fd); break;
328	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	745	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
329
330	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
331	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;
332		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
333	case REQ_QUIT:	765	case REQ_QUIT:
334	break;	766	break;
335		767
336	default:	768	default:
337	req->result = ENOSYS;	769	req->result = ENOSYS;
338	break;	770	break;
339	}	771	}
340		772
341	req->errorno = errno;	773	req->errorno = errno;
342		774
343	pthread_mutex_lock (&reslock);	775	pthread_mutex_lock (&reslock);
344		776
…		…
362	while (type != REQ_QUIT);	794	while (type != REQ_QUIT);
363		795
364	return 0;	796	return 0;
365	}	797	}
366		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
367	MODULE = IO::AIO PACKAGE = IO::AIO	874	MODULE = IO::AIO PACKAGE = IO::AIO
368		875
369	PROTOTYPES: ENABLE	876	PROTOTYPES: ENABLE
370		877
371	BOOT:	878	BOOT:
372	{	879	{
373	if (pipe (respipe))	880	HV *stash = gv_stashpv ("IO::AIO", 1);
374	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));
375		884
376	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	885	create_pipe ();
377	croak ("cannot set result pipe to nonblocking mode");	886	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
378
379	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
380	croak ("cannot set result pipe to nonblocking mode");
381	}	887	}
382		888
383	void	889	void
384	min_parallel(nthreads)	890	min_parallel (nthreads)
385	int nthreads	891	int nthreads
386	PROTOTYPE: $	892	PROTOTYPE: $
387	CODE:
388	while (nthreads > started)
389	start_thread ();
390		893
391	void	894	void
392	max_parallel(nthreads)	895	max_parallel (nthreads)
393	int nthreads	896	int nthreads
394	PROTOTYPE: $	897	PROTOTYPE: $
395	CODE:
396	{
397	int cur = started;
398	while (cur > nthreads)
399	{
400	end_thread ();
401	cur--;
402	}
403
404	while (started > nthreads)
405	{
406	poll_wait ();
407	poll_cb ();
408	}
409	}
410		898
411	int	899	int
412	max_outstanding(nreqs)	900	max_outstanding (nreqs)
413	int nreqs	901	int nreqs
414	PROTOTYPE: $	902	PROTOTYPE: $
415	CODE:	903	CODE:
416	RETVAL = max_outstanding;	904	RETVAL = max_outstanding;
417	max_outstanding = nreqs;	905	max_outstanding = nreqs;
418		906
419	void	907	void
420	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	908	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
421	SV * pathname	909	SV * pathname
422	int flags	910	int flags
423	int mode	911	int mode
424	SV * callback	912	SV * callback
425	PROTOTYPE: $$$;$	913	PROTOTYPE: $$$;$
426	CODE:	914	PPCODE:
427	{	915	{
428	aio_req req;	916	dREQ;
429
430	Newz (0, req, 1, aio_cb);
431
432	if (!req)
433	croak ("out of memory during aio_req allocation");
434		917
435	req->type = REQ_OPEN;	918	req->type = REQ_OPEN;
436	req->data = newSVsv (pathname);	919	req->data = newSVsv (pathname);
437	req->dataptr = SvPV_nolen (req->data);	920	req->dataptr = SvPVbyte_nolen (req->data);
438	req->fd = flags;	921	req->fd = flags;
439	req->mode = mode;	922	req->mode = mode;
440	req->callback = SvREFCNT_inc (callback);
441		923
442	send_req (req);	924	REQ_SEND;
443	}	925	}
444		926
445	void	927	void
446	aio_close(fh,callback=&PL_sv_undef)	928	aio_close (fh,callback=&PL_sv_undef)
447	InputStream fh	929	SV * fh
448	SV * callback	930	SV * callback
449	PROTOTYPE: $;$	931	PROTOTYPE: $;$
450	ALIAS:	932	ALIAS:
451	aio_close = REQ_CLOSE	933	aio_close = REQ_CLOSE
452	aio_fsync = REQ_FSYNC	934	aio_fsync = REQ_FSYNC
453	aio_fdatasync = REQ_FDATASYNC	935	aio_fdatasync = REQ_FDATASYNC
454	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: $$$$$;$
		959	PPCODE:
455	{	960	{
456	aio_req req;	961	aio_req req;
		962	STRLEN svlen;
		963	char *svptr = SvPVbyte (data, svlen);
457		964
458	Newz (0, req, 1, aio_cb);	965	SvUPGRADE (data, SVt_PV);
		966	SvPOK_on (data);
459		967
460	if (!req)	968	if (dataoffset < 0)
461	croak ("out of memory during aio_req allocation");	969	dataoffset += svlen;
462		970
463	req->type = ix;	971	if (dataoffset < 0 \|\| dataoffset > svlen)
464	req->fd = PerlIO_fileno (fh);	972	croak ("data offset outside of string");
465	req->callback = SvREFCNT_inc (callback);
466		973
467	send_req (req);	974	if (ix == REQ_WRITE)
468	}	975	{
469		976	/* write: check length and adjust. */
470	void	977	if (length < 0 \|\| length + dataoffset > svlen)
471	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	978	length = svlen - dataoffset;
472	InputStream fh	979	}
473	UV offset	980	else
474	IV length	981	{
475	SV * data	982	/* read: grow scalar as necessary */
476	IV dataoffset	983	svptr = SvGROW (data, length + dataoffset);
477	SV * callback	984	}
478	PROTOTYPE: $$$$$;$
479	CODE:
480	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
481
482	void
483	aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
484	OutputStream fh
485	UV offset
486	IV length
487	SV * data
488	IV dataoffset
489	SV * callback
490	PROTOTYPE: $$$$$;$
491	CODE:
492	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
493
494	void
495	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
496	InputStream fh
497	UV offset
498	IV length
499	SV * callback
500	PROTOTYPE: $$$;$
501	CODE:
502	{
503	aio_req req;
504		985
505	if (length < 0)	986	if (length < 0)
506	croak ("length must not be negative");	987	croak ("length must not be negative");
507		988
508	Newz (0, req, 1, aio_cb);	989	{
		990	dREQ;
509		991
510	if (!req)	992	req->type = ix;
511	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;
512		1044
513	req->type = REQ_READAHEAD;	1045	req->type = REQ_READAHEAD;
		1046	req->fh = newSVsv (fh);
514	req->fd = PerlIO_fileno (fh);	1047	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
515	req->offset = offset;	1048	req->offset = offset;
516	req->length = length;	1049	req->length = length;
517	req->callback = SvREFCNT_inc (callback);
518		1050
519	send_req (req);	1051	REQ_SEND;
520	}	1052	}
521		1053
522	void	1054	void
523	aio_stat(fh_or_path,callback=&PL_sv_undef)	1055	aio_stat (fh_or_path,callback=&PL_sv_undef)
524	SV * fh_or_path	1056	SV * fh_or_path
525	SV * callback	1057	SV * callback
526	ALIAS:	1058	ALIAS:
527	aio_stat = REQ_STAT	1059	aio_stat = REQ_STAT
528	aio_lstat = REQ_LSTAT	1060	aio_lstat = REQ_LSTAT
529	CODE:	1061	PPCODE:
530	{	1062	{
531	aio_req req;	1063	dREQ;
532
533	Newz (0, req, 1, aio_cb);
534
535	if (!req)
536	croak ("out of memory during aio_req allocation");
537		1064
538	New (0, req->statdata, 1, Stat_t);	1065	New (0, req->statdata, 1, Stat_t);
539
540	if (!req->statdata)	1066	if (!req->statdata)
		1067	{
		1068	req_free (req);
541	croak ("out of memory during aio_req->statdata allocation");	1069	croak ("out of memory during aio_req->statdata allocation");
		1070	}
542		1071
543	if (SvPOK (fh_or_path))	1072	if (SvPOK (fh_or_path))
544	{	1073	{
545	req->type = ix;	1074	req->type = ix;
546	req->data = newSVsv (fh_or_path);	1075	req->data = newSVsv (fh_or_path);
547	req->dataptr = SvPV_nolen (req->data);	1076	req->dataptr = SvPVbyte_nolen (req->data);
548	}	1077	}
549	else	1078	else
550	{	1079	{
551	req->type = REQ_FSTAT;	1080	req->type = REQ_FSTAT;
		1081	req->fh = newSVsv (fh_or_path);
552	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1082	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
553	}	1083	}
554		1084
555	req->callback = SvREFCNT_inc (callback);	1085	REQ_SEND;
556
557	send_req (req);
558	}	1086	}
559		1087
560	void	1088	void
561	aio_unlink(pathname,callback=&PL_sv_undef)	1089	aio_unlink (pathname,callback=&PL_sv_undef)
562	SV * pathname	1090	SV * pathname
563	SV * callback	1091	SV * callback
		1092	ALIAS:
		1093	aio_unlink = REQ_UNLINK
		1094	aio_rmdir = REQ_RMDIR
		1095	aio_readdir = REQ_READDIR
564	CODE:	1096	PPCODE:
565	{	1097	{
566	aio_req req;	1098	dREQ;
567		1099
568	Newz (0, req, 1, aio_cb);	1100	req->type = ix;
		1101	req->data = newSVsv (pathname);
		1102	req->dataptr = SvPVbyte_nolen (req->data);
569		1103
570	if (!req)	1104	REQ_SEND;
571	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;
572		1119
573	req->type = REQ_UNLINK;	1120	req->type = ix;
		1121	req->fh = newSVsv (oldpath);
		1122	req->data2ptr = SvPVbyte_nolen (req->fh);
574	req->data = newSVsv (pathname);	1123	req->data = newSVsv (newpath);
575	req->dataptr = SvPV_nolen (req->data);	1124	req->dataptr = SvPVbyte_nolen (req->data);
576	req->callback = SvREFCNT_inc (callback);
577		1125
578	send_req (req);	1126	REQ_SEND;
579	}	1127	}
580		1128
581	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
582	flush()	1160	flush ()
583	PROTOTYPE:	1161	PROTOTYPE:
584	CODE:	1162	CODE:
585	while (nreqs)	1163	while (nreqs)
586	{	1164	{
587	poll_wait ();	1165	poll_wait ();
…		…
627	CODE:	1205	CODE:
628	RETVAL = nreqs;	1206	RETVAL = nreqs;
629	OUTPUT:	1207	OUTPUT:
630	RETVAL	1208	RETVAL
631		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 1.8 by root, Mon Jul 11 02:53:59 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 1.8 by root, Mon Jul 11 02:53:59 2005 UTC vs.
Revision 1.45 by root, Sun Oct 22 00:19:05 2006 UTC