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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.12 by root, Wed Jul 20 21:57:04 2005 UTC vs.
Revision 1.48 by root, Sun Oct 22 10:33:19 2006 UTC

…		…
1	#define _XOPEN_SOURCE 500	1	#define _REENTRANT 1
		2	#include <errno.h>
2		3
3	#include "EXTERN.h"	4	#include "EXTERN.h"
4	#include "perl.h"	5	#include "perl.h"
5	#include "XSUB.h"	6	#include "XSUB.h"
6		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>
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;
57		93
58	static int started;	94	static int started, wanted;
59	static volatile int nreqs;	95	static volatile int nreqs;
60	static int max_outstanding = 1<<30;	96	static int max_outstanding = 1<<30;
61	static int respipe [2];	97	static int respipe [2];
62		98
63	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
65	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66		102
67	static volatile aio_req reqs, reqe; /* queue start, queue end */	103	static volatile aio_req reqs, reqe; /* queue start, queue end */
68	static volatile aio_req ress, rese; /* queue start, queue end */	104	static volatile aio_req ress, rese; /* queue start, queue end */
69		105
70	static void	106	static void req_free (aio_req req);
71	poll_wait ()	107
		108	/* must be called at most once */
		109	static SV req_sv (aio_req req, const char klass)
		110	{
		111	req->self = (SV *)newHV ();
		112	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		113
		114	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		115	}
		116
		117	static aio_req SvAIO_REQ (SV *sv)
		118	{
		119	if (!sv_derived_from (sv, AIO_REQ_KLASS) \|\| !SvROK (sv))
		120	croak ("object of class " AIO_REQ_KLASS " expected");
		121
		122	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		123
		124	return mg ? (aio_req)mg->mg_ptr : 0;
		125	}
		126
		127	static void poll_wait ()
72	{	128	{
73	if (nreqs && !ress)	129	if (nreqs && !ress)
74	{	130	{
75	fd_set rfd;	131	fd_set rfd;
76	FD_ZERO(&rfd);	132	FD_ZERO(&rfd);
…		…
78		134
79	select (respipe [0] + 1, &rfd, 0, 0, 0);	135	select (respipe [0] + 1, &rfd, 0, 0, 0);
80	}	136	}
81	}	137	}
82		138
83	static int	139	static void req_invoke (aio_req req)
84	poll_cb ()	140	{
		141	dSP;
		142	int errorno = errno;
		143
		144	if (req->cancelled \|\| !SvOK (req->callback))
		145	return;
		146
		147	errno = req->errorno;
		148
		149	ENTER;
		150	PUSHMARK (SP);
		151	EXTEND (SP, 1);
		152
		153	switch (req->type)
		154	{
		155	case REQ_READDIR:
		156	{
		157	SV *rv = &PL_sv_undef;
		158
		159	if (req->result >= 0)
		160	{
		161	char *buf = req->data2ptr;
		162	AV *av = newAV ();
		163
		164	while (req->result)
		165	{
		166	SV *sv = newSVpv (buf, 0);
		167
		168	av_push (av, sv);
		169	buf += SvCUR (sv) + 1;
		170	req->result--;
		171	}
		172
		173	rv = sv_2mortal (newRV_noinc ((SV *)av));
		174	}
		175
		176	PUSHs (rv);
		177	}
		178	break;
		179
		180	case REQ_OPEN:
		181	{
		182	/* convert fd to fh */
		183	SV *fh;
		184
		185	PUSHs (sv_2mortal (newSViv (req->result)));
		186	PUTBACK;
		187	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		188	SPAGAIN;
		189
		190	fh = SvREFCNT_inc (POPs);
		191
		192	PUSHMARK (SP);
		193	XPUSHs (sv_2mortal (fh));
		194	}
		195	break;
		196
		197	case REQ_GROUP:
		198	if (req->data)
		199	{
		200	int i;
		201	AV av = (AV )req->data;
		202
		203	EXTEND (SP, AvFILL (av) + 1);
		204	for (i = 0; i <= AvFILL (av); ++i)
		205	PUSHs (*av_fetch (av, i, 0));
		206	}
		207	break;
		208
		209	case REQ_SLEEP:
		210	break;
		211
		212	default:
		213	PUSHs (sv_2mortal (newSViv (req->result)));
		214	break;
		215	}
		216
		217
		218	PUTBACK;
		219	call_sv (req->callback, G_VOID \| G_EVAL);
		220	SPAGAIN;
		221
		222	if (SvTRUE (ERRSV))
		223	{
		224	req_free (req);
		225	croak (0);
		226	}
		227
		228	LEAVE;
		229
		230	errno = errorno;
		231	}
		232
		233	static void req_free (aio_req req)
		234	{
		235	if (req->grp)
		236	{
		237	aio_req grp = req->grp;
		238
		239	/* unlink request */
		240	req->grp_next->grp_prev = req->grp_prev;
		241	req->grp_prev->grp_next = req->grp_next;
		242
		243	if (grp->grp_next == grp && grp->fd)
		244	{
		245	req_invoke (grp);
		246	req_free (grp);
		247	}
		248	}
		249
		250	if (req->self)
		251	{
		252	sv_unmagic (req->self, PERL_MAGIC_ext);
		253	SvREFCNT_dec (req->self);
		254	}
		255
		256	if (req->data)
		257	SvREFCNT_dec (req->data);
		258
		259	if (req->fh)
		260	SvREFCNT_dec (req->fh);
		261
		262	if (req->fh2)
		263	SvREFCNT_dec (req->fh2);
		264
		265	if (req->statdata)
		266	Safefree (req->statdata);
		267
		268	if (req->callback)
		269	SvREFCNT_dec (req->callback);
		270
		271	if (req->type == REQ_READDIR && req->result >= 0)
		272	free (req->data2ptr);
		273
		274	Safefree (req);
		275	}
		276
		277	static void req_cancel (aio_req req)
		278	{
		279	req->cancelled = 1;
		280
		281	if (req->type == REQ_GROUP)
		282	{
		283	aio_req sub;
		284
		285	for (sub = req->grp_next; sub != req; sub = sub->grp_next)
		286	req_cancel (sub);
		287	}
		288	}
		289
		290	static int poll_cb ()
85	{	291	{
86	dSP;	292	dSP;
87	int count = 0;	293	int count = 0;
		294	int do_croak = 0;
88	aio_req req, prv;	295	aio_req req;
89		296
		297	for (;;)
		298	{
90	pthread_mutex_lock (&reslock);	299	pthread_mutex_lock (&reslock);
		300	req = ress;
91		301
92	{	302	if (req)
		303	{
		304	ress = req->next;
		305
		306	if (!ress)
		307	{
93	/* read any signals sent by the worker threads */	308	/* read any signals sent by the worker threads */
94	char buf [32];	309	char buf [32];
95	while (read (respipe [0], buf, 32) > 0)	310	while (read (respipe [0], buf, 32) == 32)
		311	;
		312
		313	rese = 0;
		314	}
96	;	315	}
97	}
98		316
99	req = ress;
100	ress = rese = 0;
101
102	pthread_mutex_unlock (&reslock);	317	pthread_mutex_unlock (&reslock);
103		318
104	while (req)	319	if (!req)
105	{	320	break;
		321
106	nreqs--;	322	nreqs--;
107		323
108	if (req->type == REQ_QUIT)	324	if (req->type == REQ_QUIT)
109	started--;	325	started--;
		326	else if (req->type == REQ_GROUP && req->grp_next != req)
		327	{
		328	req->fd = 1; /* mark request as delayed */
		329	continue;
		330	}
110	else	331	else
111	{	332	{
112	int errorno = errno;
113	errno = req->errorno;
114
115	if (req->type == REQ_READ)	333	if (req->type == REQ_READ)
116	SvCUR_set (req->data, req->dataoffset	334	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
117	+ req->result > 0 ? req->result : 0);
118		335
		336	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
		337	SvREADONLY_off (req->data);
		338
119	if (req->data)	339	if (req->statdata)
120	SvREFCNT_dec (req->data);
121
122	if (req->type == REQ_STAT \|\| req->type == REQ_LSTAT \|\| req->type == REQ_FSTAT)
123	{	340	{
124	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	341	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
125	PL_laststatval = req->result;	342	PL_laststatval = req->result;
126	PL_statcache = *(req->statdata);	343	PL_statcache = *(req->statdata);
127
128	Safefree (req->statdata);
129	}	344	}
130		345
131	PUSHMARK (SP);	346	req_invoke (req);
132	XPUSHs (sv_2mortal (newSViv (req->result)));
133		347
134	if (req->type == REQ_OPEN)
135	{
136	/* convert fd to fh */
137	SV *fh;
138
139	PUTBACK;
140	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
141	SPAGAIN;
142
143	fh = POPs;
144
145	PUSHMARK (SP);
146	XPUSHs (fh);
147	}
148
149	if (SvOK (req->callback))
150	{
151	PUTBACK;
152	call_sv (req->callback, G_VOID \| G_EVAL);
153	SPAGAIN;
154	}
155
156	if (req->callback)
157	SvREFCNT_dec (req->callback);
158
159	errno = errorno;
160	count++;	348	count++;
161	}	349	}
162		350
163	prv = req;
164	req = req->next;
165	Safefree (prv);	351	req_free (req);
166
167	/* TODO: croak on errors? */
168	}	352	}
169		353
170	return count;	354	return count;
171	}	355	}
172		356
173	static void aio_proc(void arg);	357	static void aio_proc(void arg);
174		358
175	static void
176	start_thread (void)	359	static void start_thread (void)
177	{	360	{
178	sigset_t fullsigset, oldsigset;	361	sigset_t fullsigset, oldsigset;
179	pthread_t tid;	362	pthread_t tid;
180	pthread_attr_t attr;	363	pthread_attr_t attr;
181		364
…		…
190	started++;	373	started++;
191		374
192	sigprocmask (SIG_SETMASK, &oldsigset, 0);	375	sigprocmask (SIG_SETMASK, &oldsigset, 0);
193	}	376	}
194		377
195	static void	378	static void req_send (aio_req req)
196	send_req (aio_req req)
197	{	379	{
		380	while (started < wanted && nreqs >= started)
		381	start_thread ();
		382
198	nreqs++;	383	nreqs++;
199		384
200	pthread_mutex_lock (&reqlock);	385	pthread_mutex_lock (&reqlock);
201		386
202	req->next = 0;	387	req->next = 0;
…		…
210	reqe = reqs = req;	395	reqe = reqs = req;
211		396
212	pthread_cond_signal (&reqwait);	397	pthread_cond_signal (&reqwait);
213	pthread_mutex_unlock (&reqlock);	398	pthread_mutex_unlock (&reqlock);
214		399
215	while (nreqs > max_outstanding)	400	if (nreqs > max_outstanding)
		401	for (;;)
		402	{
		403	poll_cb ();
		404
		405	if (nreqs <= max_outstanding)
		406	break;
		407
		408	poll_wait ();
		409	}
		410	}
		411
		412	static void end_thread (void)
		413	{
		414	aio_req req;
		415	Newz (0, req, 1, aio_cb);
		416	req->type = REQ_QUIT;
		417
		418	req_send (req);
		419	}
		420
		421	static void min_parallel (int nthreads)
		422	{
		423	if (wanted < nthreads)
		424	wanted = nthreads;
		425	}
		426
		427	static void max_parallel (int nthreads)
		428	{
		429	int cur = started;
		430
		431	if (wanted > nthreads)
		432	wanted = nthreads;
		433
		434	while (cur > wanted)
		435	{
		436	end_thread ();
		437	cur--;
		438	}
		439
		440	while (started > wanted)
216	{	441	{
217	poll_wait ();	442	poll_wait ();
218	poll_cb ();	443	poll_cb ();
219	}	444	}
220	}	445	}
221		446
222	static void	447	static void create_pipe ()
223	end_thread (void)
224	{	448	{
225	aio_req req;	449	if (pipe (respipe))
226	New (0, req, 1, aio_cb);	450	croak ("unable to initialize result pipe");
227	req->type = REQ_QUIT;
228		451
229	send_req (req);	452	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
230	}	453	croak ("cannot set result pipe to nonblocking mode");
231		454
232	static void	455	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
233	read_write (int dowrite, int fd, off_t offset, size_t length,	456	croak ("cannot set result pipe to nonblocking mode");
234	SV data, STRLEN dataoffset, SV callback)	457	}
235	{
236	aio_req req;
237	STRLEN svlen;
238	char *svptr = SvPV (data, svlen);
239		458
240	SvUPGRADE (data, SVt_PV);	459	/*****************************************************************************/
241	SvPOK_on (data);	460	/* work around various missing functions */
242		461
243	if (dataoffset < 0)	462	#if !HAVE_PREADWRITE
		463	# define pread aio_pread
		464	# define pwrite aio_pwrite
		465
		466	/*
		467	* make our pread/pwrite safe against themselves, but not against
		468	* normal read/write by using a mutex. slows down execution a lot,
		469	* but that's your problem, not mine.
		470	*/
		471	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
		472
		473	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
		474	{
		475	ssize_t res;
		476	off_t ooffset;
		477
		478	pthread_mutex_lock (&preadwritelock);
		479	ooffset = lseek (fd, 0, SEEK_CUR);
		480	lseek (fd, offset, SEEK_SET);
		481	res = read (fd, buf, count);
		482	lseek (fd, ooffset, SEEK_SET);
		483	pthread_mutex_unlock (&preadwritelock);
		484
		485	return res;
		486	}
		487
		488	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
		489	{
		490	ssize_t res;
		491	off_t ooffset;
		492
		493	pthread_mutex_lock (&preadwritelock);
		494	ooffset = lseek (fd, 0, SEEK_CUR);
		495	lseek (fd, offset, SEEK_SET);
		496	res = write (fd, buf, count);
		497	lseek (fd, offset, SEEK_SET);
		498	pthread_mutex_unlock (&preadwritelock);
		499
		500	return res;
		501	}
		502	#endif
		503
		504	#if !HAVE_FDATASYNC
		505	# define fdatasync fsync
		506	#endif
		507
		508	#if !HAVE_READAHEAD
		509	# define readahead aio_readahead
		510
		511	static ssize_t readahead (int fd, off_t offset, size_t count)
		512	{
		513	char readahead_buf[4096];
		514
		515	while (count > 0)
		516	{
		517	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
		518
		519	pread (fd, readahead_buf, len, offset);
244	dataoffset += svlen;	520	offset += len;
245		521	count -= len;
246	if (dataoffset < 0 \|\| dataoffset > svlen)
247	croak ("data offset outside of string");
248
249	if (dowrite)
250	{	522	}
251	/* write: check length and adjust. */	523
252	if (length < 0 \|\| length + dataoffset > svlen)	524	errno = 0;
253	length = svlen - dataoffset;	525	}
		526	#endif
		527
		528	#if !HAVE_READDIR_R
		529	# define readdir_r aio_readdir_r
		530
		531	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		532
		533	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
		534	{
		535	struct dirent *e;
		536	int errorno;
		537
		538	pthread_mutex_lock (&readdirlock);
		539
		540	e = readdir (dirp);
		541	errorno = errno;
		542
		543	if (e)
		544	{
		545	*res = ent;
		546	strcpy (ent->d_name, e->d_name);
254	}	547	}
255	else	548	else
		549	*res = 0;
		550
		551	pthread_mutex_unlock (&readdirlock);
		552
		553	errno = errorno;
		554	return e ? 0 : -1;
		555	}
		556	#endif
		557
		558	/* sendfile always needs emulation */
		559	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
		560	{
		561	ssize_t res;
		562
		563	if (!count)
		564	return 0;
		565
		566	#if HAVE_SENDFILE
		567	# if __linux
		568	res = sendfile (ofd, ifd, &offset, count);
		569
		570	# elif __freebsd
		571	/*
		572	* Of course, the freebsd sendfile is a dire hack with no thoughts
		573	* wasted on making it similar to other I/O functions.
		574	*/
256	{	575	{
257	/* read: grow scalar as necessary */	576	off_t sbytes;
258	svptr = SvGROW (data, length + dataoffset);	577	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		578
		579	if (res < 0 && sbytes)
		580	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
		581	res = sbytes;
		582	}
		583
		584	# elif __hpux
		585	res = sendfile (ofd, ifd, offset, count, 0, 0);
		586
		587	# elif __solaris
		588	{
		589	struct sendfilevec vec;
		590	size_t sbytes;
		591
		592	vec.sfv_fd = ifd;
		593	vec.sfv_flag = 0;
		594	vec.sfv_off = offset;
		595	vec.sfv_len = count;
		596
		597	res = sendfilev (ofd, &vec, 1, &sbytes);
		598
		599	if (res < 0 && sbytes)
		600	res = sbytes;
		601	}
		602
		603	# endif
		604	#else
		605	res = -1;
		606	errno = ENOSYS;
		607	#endif
		608
		609	if (res < 0
		610	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK
		611	#if __solaris
		612	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE
		613	#endif
		614	)
		615	)
259	}	616	{
		617	/* emulate sendfile. this is a major pain in the ass */
		618	char buf[4096];
		619	res = 0;
260		620
261	if (length < 0)	621	while (count)
262	croak ("length must not be negative");	622	{
		623	ssize_t cnt;
		624
		625	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
263		626
264	Newz (0, req, 1, aio_cb);	627	if (cnt <= 0)
		628	{
		629	if (cnt && !res) res = -1;
		630	break;
		631	}
265		632
		633	cnt = write (ofd, buf, cnt);
		634
		635	if (cnt <= 0)
		636	{
		637	if (cnt && !res) res = -1;
		638	break;
		639	}
		640
		641	offset += cnt;
		642	res += cnt;
		643	count -= cnt;
		644	}
		645	}
		646
		647	return res;
		648	}
		649
		650	/* read a full directory */
		651	static int scandir_ (const char path, void *namesp)
		652	{
		653	DIR *dirp = opendir (path);
		654	union
		655	{
		656	struct dirent d;
		657	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		658	} u;
		659	struct dirent *entp;
		660	char name, names;
		661	int memlen = 4096;
		662	int memofs = 0;
		663	int res = 0;
		664	int errorno;
		665
266	if (!req)	666	if (!dirp)
267	croak ("out of memory during aio_req allocation");	667	return -1;
268		668
269	req->type = dowrite ? REQ_WRITE : REQ_READ;	669	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		670
277	send_req (req);	671	for (;;)
278	}	672	{
		673	errno = 0, readdir_r (dirp, &u.d, &entp);
279		674
280	static void *	675	if (!entp)
		676	break;
		677
		678	name = entp->d_name;
		679
		680	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
		681	{
		682	int len = strlen (name) + 1;
		683
		684	res++;
		685
		686	while (memofs + len > memlen)
		687	{
		688	memlen *= 2;
		689	names = realloc (names, memlen);
		690	if (!names)
		691	break;
		692	}
		693
		694	memcpy (names + memofs, name, len);
		695	memofs += len;
		696	}
		697	}
		698
		699	errorno = errno;
		700	closedir (dirp);
		701
		702	if (errorno)
		703	{
		704	free (names);
		705	errno = errorno;
		706	res = -1;
		707	}
		708
		709	namesp = (void )names;
		710	return res;
		711	}
		712
		713	/*****************************************************************************/
		714
281	aio_proc (void *thr_arg)	715	static void aio_proc (void thr_arg)
282	{	716	{
283	aio_req req;	717	aio_req req;
284	int type;	718	int type;
285		719
286	do	720	do
…		…
305		739
306	pthread_mutex_unlock (&reqlock);	740	pthread_mutex_unlock (&reqlock);
307		741
308	errno = 0; /* strictly unnecessary */	742	errno = 0; /* strictly unnecessary */
309		743
310	type = req->type;	744	if (!req->cancelled)
311
312	switch (type)	745	switch (req->type)
313	{	746	{
314	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	747	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
315	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	748	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
316	#if SYS_readahead	749
317	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	750	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
318	#else	751	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		752
322	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	753	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
323	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	754	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
324	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	755	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
325		756
326	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	757	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
327	case REQ_CLOSE: req->result = close (req->fd); break;	758	case REQ_CLOSE: req->result = close (req->fd); break;
328	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	759	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
329
330	case REQ_FSYNC: req->result = fsync (req->fd); break;	760	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		761	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		762	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
		763	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		764
331	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	765	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
		766	case REQ_FSYNC: req->result = fsync (req->fd); break;
		767	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
332		768
		769	case REQ_SLEEP:
		770	{
		771	struct timeval tv;
		772
		773	tv.tv_sec = req->fd;
		774	tv.tv_usec = req->fd2;
		775
		776	req->result = select (0, 0, 0, 0, &tv);
		777	}
		778
333	case REQ_QUIT:	779	case REQ_QUIT:
334	break;	780	break;
335		781
336	default:	782	default:
337	req->result = ENOSYS;	783	req->result = ENOSYS;
338	break;	784	break;
339	}	785	}
340		786
341	req->errorno = errno;	787	req->errorno = errno;
342		788
343	pthread_mutex_lock (&reslock);	789	pthread_mutex_lock (&reslock);
344		790
…		…
362	while (type != REQ_QUIT);	808	while (type != REQ_QUIT);
363		809
364	return 0;	810	return 0;
365	}	811	}
366		812
		813	/*****************************************************************************/
		814
		815	static void atfork_prepare (void)
		816	{
		817	pthread_mutex_lock (&reqlock);
		818	pthread_mutex_lock (&reslock);
		819	#if !HAVE_PREADWRITE
		820	pthread_mutex_lock (&preadwritelock);
		821	#endif
		822	#if !HAVE_READDIR_R
		823	pthread_mutex_lock (&readdirlock);
		824	#endif
		825	}
		826
		827	static void atfork_parent (void)
		828	{
		829	#if !HAVE_READDIR_R
		830	pthread_mutex_unlock (&readdirlock);
		831	#endif
		832	#if !HAVE_PREADWRITE
		833	pthread_mutex_unlock (&preadwritelock);
		834	#endif
		835	pthread_mutex_unlock (&reslock);
		836	pthread_mutex_unlock (&reqlock);
		837	}
		838
		839	static void atfork_child (void)
		840	{
		841	aio_req prv;
		842
		843	started = 0;
		844
		845	while (reqs)
		846	{
		847	prv = reqs;
		848	reqs = prv->next;
		849	req_free (prv);
		850	}
		851
		852	reqs = reqe = 0;
		853
		854	while (ress)
		855	{
		856	prv = ress;
		857	ress = prv->next;
		858	req_free (prv);
		859	}
		860
		861	ress = rese = 0;
		862
		863	close (respipe [0]);
		864	close (respipe [1]);
		865	create_pipe ();
		866
		867	atfork_parent ();
		868	}
		869
		870	#define dREQ \
		871	aio_req req; \
		872	\
		873	if (SvOK (callback) && !SvROK (callback)) \
		874	croak ("callback must be undef or of reference type"); \
		875	\
		876	Newz (0, req, 1, aio_cb); \
		877	if (!req) \
		878	croak ("out of memory during aio_req allocation"); \
		879	\
		880	req->callback = newSVsv (callback)
		881
		882	#define REQ_SEND \
		883	req_send (req); \
		884	\
		885	if (GIMME_V != G_VOID) \
		886	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		887
367	MODULE = IO::AIO PACKAGE = IO::AIO	888	MODULE = IO::AIO PACKAGE = IO::AIO
368		889
369	PROTOTYPES: ENABLE	890	PROTOTYPES: ENABLE
370		891
371	BOOT:	892	BOOT:
372	{	893	{
373	if (pipe (respipe))	894	HV *stash = gv_stashpv ("IO::AIO", 1);
374	croak ("unable to initialize result pipe");	895	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		896	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		897	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
375		898
376	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	899	create_pipe ();
377	croak ("cannot set result pipe to nonblocking mode");	900	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	}	901	}
382		902
383	void	903	void
384	min_parallel(nthreads)	904	min_parallel (nthreads)
385	int nthreads	905	int nthreads
386	PROTOTYPE: $	906	PROTOTYPE: $
387	CODE:
388	while (nthreads > started)
389	start_thread ();
390		907
391	void	908	void
392	max_parallel(nthreads)	909	max_parallel (nthreads)
393	int nthreads	910	int nthreads
394	PROTOTYPE: $	911	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		912
411	int	913	int
412	max_outstanding(nreqs)	914	max_outstanding (nreqs)
413	int nreqs	915	int nreqs
414	PROTOTYPE: $	916	PROTOTYPE: $
415	CODE:	917	CODE:
416	RETVAL = max_outstanding;	918	RETVAL = max_outstanding;
417	max_outstanding = nreqs;	919	max_outstanding = nreqs;
418		920
419	void	921	void
420	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	922	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
421	SV * pathname	923	SV * pathname
422	int flags	924	int flags
423	int mode	925	int mode
424	SV * callback	926	SV * callback
425	PROTOTYPE: $$$;$	927	PROTOTYPE: $$$;$
426	CODE:	928	PPCODE:
427	{	929	{
428	aio_req req;	930	dREQ;
429
430	Newz (0, req, 1, aio_cb);
431
432	if (!req)
433	croak ("out of memory during aio_req allocation");
434		931
435	req->type = REQ_OPEN;	932	req->type = REQ_OPEN;
436	req->data = newSVsv (pathname);	933	req->data = newSVsv (pathname);
437	req->dataptr = SvPV_nolen (req->data);	934	req->dataptr = SvPVbyte_nolen (req->data);
438	req->fd = flags;	935	req->fd = flags;
439	req->mode = mode;	936	req->mode = mode;
440	req->callback = SvREFCNT_inc (callback);
441		937
442	send_req (req);	938	REQ_SEND;
443	}	939	}
444		940
445	void	941	void
446	aio_close(fh,callback=&PL_sv_undef)	942	aio_close (fh,callback=&PL_sv_undef)
447	InputStream fh	943	SV * fh
448	SV * callback	944	SV * callback
449	PROTOTYPE: $;$	945	PROTOTYPE: $;$
450	ALIAS:	946	ALIAS:
451	aio_close = REQ_CLOSE	947	aio_close = REQ_CLOSE
452	aio_fsync = REQ_FSYNC	948	aio_fsync = REQ_FSYNC
453	aio_fdatasync = REQ_FDATASYNC	949	aio_fdatasync = REQ_FDATASYNC
454	CODE:	950	PPCODE:
		951	{
		952	dREQ;
		953
		954	req->type = ix;
		955	req->fh = newSVsv (fh);
		956	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
		957
		958	REQ_SEND (req);
		959	}
		960
		961	void
		962	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
		963	SV * fh
		964	UV offset
		965	UV length
		966	SV * data
		967	UV dataoffset
		968	SV * callback
		969	ALIAS:
		970	aio_read = REQ_READ
		971	aio_write = REQ_WRITE
		972	PROTOTYPE: $$$$$;$
		973	PPCODE:
455	{	974	{
456	aio_req req;	975	aio_req req;
		976	STRLEN svlen;
		977	char *svptr = SvPVbyte (data, svlen);
457		978
458	Newz (0, req, 1, aio_cb);	979	SvUPGRADE (data, SVt_PV);
		980	SvPOK_on (data);
459		981
460	if (!req)	982	if (dataoffset < 0)
461	croak ("out of memory during aio_req allocation");	983	dataoffset += svlen;
462		984
463	req->type = ix;	985	if (dataoffset < 0 \|\| dataoffset > svlen)
464	req->fd = PerlIO_fileno (fh);	986	croak ("data offset outside of string");
465	req->callback = SvREFCNT_inc (callback);
466		987
467	send_req (req);	988	if (ix == REQ_WRITE)
468	}	989	{
469		990	/* write: check length and adjust. */
470	void	991	if (length < 0 \|\| length + dataoffset > svlen)
471	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	992	length = svlen - dataoffset;
472	InputStream fh	993	}
473	UV offset	994	else
474	IV length	995	{
475	SV * data	996	/* read: grow scalar as necessary */
476	IV dataoffset	997	svptr = SvGROW (data, length + dataoffset);
477	SV * callback	998	}
478	PROTOTYPE: $$$$$;$
479	CODE:
480	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
481
482	void
483	aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
484	OutputStream fh
485	UV offset
486	IV length
487	SV * data
488	IV dataoffset
489	SV * callback
490	PROTOTYPE: $$$$$;$
491	CODE:
492	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
493
494	void
495	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
496	InputStream fh
497	UV offset
498	IV length
499	SV * callback
500	PROTOTYPE: $$$;$
501	CODE:
502	{
503	aio_req req;
504		999
505	if (length < 0)	1000	if (length < 0)
506	croak ("length must not be negative");	1001	croak ("length must not be negative");
507		1002
508	Newz (0, req, 1, aio_cb);	1003	{
		1004	dREQ;
509		1005
510	if (!req)	1006	req->type = ix;
511	croak ("out of memory during aio_req allocation");	1007	req->fh = newSVsv (fh);
		1008	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
		1009	: IoOFP (sv_2io (fh)));
		1010	req->offset = offset;
		1011	req->length = length;
		1012	req->data = SvREFCNT_inc (data);
		1013	req->dataptr = (char *)svptr + dataoffset;
		1014
		1015	if (!SvREADONLY (data))
		1016	{
		1017	SvREADONLY_on (data);
		1018	req->data2ptr = (void *)data;
		1019	}
		1020
		1021	REQ_SEND;
		1022	}
		1023	}
		1024
		1025	void
		1026	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1027	SV * out_fh
		1028	SV * in_fh
		1029	UV in_offset
		1030	UV length
		1031	SV * callback
		1032	PROTOTYPE: $$$$;$
		1033	PPCODE:
		1034	{
		1035	dREQ;
		1036
		1037	req->type = REQ_SENDFILE;
		1038	req->fh = newSVsv (out_fh);
		1039	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1040	req->fh2 = newSVsv (in_fh);
		1041	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1042	req->offset = in_offset;
		1043	req->length = length;
		1044
		1045	REQ_SEND;
		1046	}
		1047
		1048	void
		1049	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
		1050	SV * fh
		1051	UV offset
		1052	IV length
		1053	SV * callback
		1054	PROTOTYPE: $$$;$
		1055	PPCODE:
		1056	{
		1057	dREQ;
512		1058
513	req->type = REQ_READAHEAD;	1059	req->type = REQ_READAHEAD;
		1060	req->fh = newSVsv (fh);
514	req->fd = PerlIO_fileno (fh);	1061	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
515	req->offset = offset;	1062	req->offset = offset;
516	req->length = length;	1063	req->length = length;
517	req->callback = SvREFCNT_inc (callback);
518		1064
519	send_req (req);	1065	REQ_SEND;
520	}	1066	}
521		1067
522	void	1068	void
523	aio_stat(fh_or_path,callback=&PL_sv_undef)	1069	aio_stat (fh_or_path,callback=&PL_sv_undef)
524	SV * fh_or_path	1070	SV * fh_or_path
525	SV * callback	1071	SV * callback
526	ALIAS:	1072	ALIAS:
527	aio_stat = REQ_STAT	1073	aio_stat = REQ_STAT
528	aio_lstat = REQ_LSTAT	1074	aio_lstat = REQ_LSTAT
529	CODE:	1075	PPCODE:
530	{	1076	{
531	aio_req req;	1077	dREQ;
532
533	Newz (0, req, 1, aio_cb);
534
535	if (!req)
536	croak ("out of memory during aio_req allocation");
537		1078
538	New (0, req->statdata, 1, Stat_t);	1079	New (0, req->statdata, 1, Stat_t);
539
540	if (!req->statdata)	1080	if (!req->statdata)
		1081	{
		1082	req_free (req);
541	croak ("out of memory during aio_req->statdata allocation");	1083	croak ("out of memory during aio_req->statdata allocation");
		1084	}
542		1085
543	if (SvPOK (fh_or_path))	1086	if (SvPOK (fh_or_path))
544	{	1087	{
545	req->type = ix;	1088	req->type = ix;
546	req->data = newSVsv (fh_or_path);	1089	req->data = newSVsv (fh_or_path);
547	req->dataptr = SvPV_nolen (req->data);	1090	req->dataptr = SvPVbyte_nolen (req->data);
548	}	1091	}
549	else	1092	else
550	{	1093	{
551	req->type = REQ_FSTAT;	1094	req->type = REQ_FSTAT;
		1095	req->fh = newSVsv (fh_or_path);
552	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1096	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
553	}	1097	}
554		1098
555	req->callback = SvREFCNT_inc (callback);	1099	REQ_SEND;
556
557	send_req (req);
558	}	1100	}
559		1101
560	void	1102	void
561	aio_unlink(pathname,callback=&PL_sv_undef)	1103	aio_unlink (pathname,callback=&PL_sv_undef)
562	SV * pathname	1104	SV * pathname
563	SV * callback	1105	SV * callback
		1106	ALIAS:
		1107	aio_unlink = REQ_UNLINK
		1108	aio_rmdir = REQ_RMDIR
		1109	aio_readdir = REQ_READDIR
564	CODE:	1110	PPCODE:
565	{	1111	{
566	aio_req req;	1112	dREQ;
567		1113
568	Newz (0, req, 1, aio_cb);	1114	req->type = ix;
		1115	req->data = newSVsv (pathname);
		1116	req->dataptr = SvPVbyte_nolen (req->data);
569		1117
570	if (!req)	1118	REQ_SEND;
571	croak ("out of memory during aio_req allocation");	1119	}
		1120
		1121	void
		1122	aio_link (oldpath,newpath,callback=&PL_sv_undef)
		1123	SV * oldpath
		1124	SV * newpath
		1125	SV * callback
		1126	ALIAS:
		1127	aio_link = REQ_LINK
		1128	aio_symlink = REQ_SYMLINK
		1129	aio_rename = REQ_RENAME
		1130	PPCODE:
		1131	{
		1132	dREQ;
572		1133
573	req->type = REQ_UNLINK;	1134	req->type = ix;
		1135	req->fh = newSVsv (oldpath);
		1136	req->data2ptr = SvPVbyte_nolen (req->fh);
574	req->data = newSVsv (pathname);	1137	req->data = newSVsv (newpath);
575	req->dataptr = SvPV_nolen (req->data);	1138	req->dataptr = SvPVbyte_nolen (req->data);
576	req->callback = SvREFCNT_inc (callback);
577		1139
578	send_req (req);	1140	REQ_SEND;
579	}	1141	}
580		1142
581	void	1143	void
		1144	aio_sleep (delay,callback=&PL_sv_undef)
		1145	double delay
		1146	SV * callback
		1147	PPCODE:
		1148	{
		1149	dREQ;
		1150
		1151	req->type = REQ_SLEEP;
		1152	req->fd = delay < 0. ? 0 : delay;
		1153	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1154
		1155	REQ_SEND;
		1156	}
		1157
		1158	void
		1159	aio_group (callback=&PL_sv_undef)
		1160	SV * callback
		1161	PROTOTYPE: ;$
		1162	PPCODE:
		1163	{
		1164	dREQ;
		1165	req->type = REQ_GROUP;
		1166	req->grp_next = req;
		1167	req->grp_prev = req;
		1168
		1169	req_send (req);
		1170	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1171	}
		1172
		1173	void
582	flush()	1174	flush ()
583	PROTOTYPE:	1175	PROTOTYPE:
584	CODE:	1176	CODE:
585	while (nreqs)	1177	while (nreqs)
586	{	1178	{
587	poll_wait ();	1179	poll_wait ();
…		…
627	CODE:	1219	CODE:
628	RETVAL = nreqs;	1220	RETVAL = nreqs;
629	OUTPUT:	1221	OUTPUT:
630	RETVAL	1222	RETVAL
631		1223
		1224	PROTOTYPES: DISABLE
		1225
		1226	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1227
		1228	void
		1229	cancel (aio_req_ornot req)
		1230	PROTOTYPE:
		1231	CODE:
		1232	req_cancel (req);
		1233
		1234	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1235
		1236	void
		1237	add (aio_req grp, ...)
		1238	PPCODE:
		1239	{
		1240	int i;
		1241
		1242	for (i = 1; i < items; ++i )
		1243	{
		1244	if (GIMME_V != G_VOID)
		1245	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1246
		1247	aio_req req = SvAIO_REQ (ST (i));
		1248
		1249	if (req)
		1250	{
		1251	req->grp_prev = grp;
		1252	req->grp_next = grp->grp_next;
		1253	grp->grp_next->grp_prev = req;
		1254	grp->grp_next = req;
		1255
		1256	req->grp = grp;
		1257	}
		1258	}
		1259	}
		1260
		1261	void
		1262	result (aio_req grp, ...)
		1263	CODE:
		1264	{
		1265	int i;
		1266	AV *av = newAV ();
		1267
		1268	if (grp->data)
		1269	SvREFCNT_dec (grp->data);
		1270
		1271	for (i = 1; i < items; ++i )
		1272	av_push (av, newSVsv (ST (i)));
		1273
		1274	grp->data = (SV *)av;
		1275	}
		1276

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.12 by root, Wed Jul 20 21:57:04 2005 UTC vs. Revision 1.48 by root, Sun Oct 22 10:33:19 2006 UTC

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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.12 by root, Wed Jul 20 21:57:04 2005 UTC vs.
Revision 1.48 by root, Sun Oct 22 10:33:19 2006 UTC