[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 1.43 by root, Sat Oct 21 23:06:04 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>
7	#include <sys/types.h>	14	#include <sys/types.h>
8	#include <sys/stat.h>	15	#include <sys/stat.h>
9		16	#include <limits.h>
10	#include <unistd.h>	17	#include <unistd.h>
11	#include <fcntl.h>	18	#include <fcntl.h>
12	#include <signal.h>	19	#include <signal.h>
13	#include <sched.h>	20	#include <sched.h>
		21
		22	#if HAVE_SENDFILE
14	#if __linux	23	# if __linux
		24	# include <sys/sendfile.h>
		25	# elif __freebsd
15	#include <sys/syscall.h>	26	# include <sys/socket.h>
		27	# include <sys/uio.h>
		28	# elif __hpux
		29	# include <sys/socket.h>
		30	# elif __solaris /* not yet */
		31	# include <sys/sendfile.h>
		32	# else
		33	# error sendfile support requested but not available
16	#endif	34	# endif
		35	#endif
17		36
18	#include <pthread.h>	37	/* used for struct dirent, AIX doesn't provide it */
19		38	#ifndef NAME_MAX
20	typedef void InputStream; / hack, but 5.6.1 is simply toooo old ;) */	39	# define NAME_MAX 4096
21	typedef void OutputStream; / hack, but 5.6.1 is simply toooo old ;) */	40	#endif
22	typedef void InOutStream; / hack, but 5.6.1 is simply toooo old ;) */
23		41
24	#if __ia64	42	#if __ia64
25	# define STACKSIZE 65536	43	# define STACKSIZE 65536
26	#else	44	#else
27	# define STACKSIZE 4096	45	# define STACKSIZE 8192
28	#endif	46	#endif
29		47
30	enum {	48	enum {
31	REQ_QUIT,	49	REQ_QUIT,
32	REQ_OPEN, REQ_CLOSE,	50	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,	51	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		52	REQ_SENDFILE,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,	53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,	54	REQ_FSYNC, REQ_FDATASYNC,
		55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
		56	REQ_READDIR,
		57	REQ_LINK, REQ_SYMLINK,
36	};	58	};
37		59
		60	#define AIO_CB_KLASS "IO::AIO::CB"
		61
38	typedef struct aio_cb {	62	typedef struct aio_cb
		63	{
		64	struct aio_cb grp_prev, grp_next;
		65	struct aio_grp *grp;
		66
39	struct aio_cb *volatile next;	67	struct aio_cb *volatile next;
40		68
41	int type;	69	SV self; / the perl counterpart of this request, if any */
42		70
43	int fd;	71	SV data, callback;
		72	SV fh, fh2;
		73	void dataptr, data2ptr;
		74	Stat_t *statdata;
44	off_t offset;	75	off_t offset;
45	size_t length;	76	size_t length;
46	ssize_t result;	77	ssize_t result;
		78
		79	int type;
		80	int fd, fd2;
		81	int errorno;
		82	STRLEN dataoffset;
47	mode_t mode; /* open */	83	mode_t mode; /* open */
48	int errorno;	84	unsigned char cancelled;
49	SV data, callback;
50	void *dataptr;
51	STRLEN dataoffset;
52
53	Stat_t *statdata;
54	} aio_cb;	85	} aio_cb;
55		86
56	typedef aio_cb *aio_req;	87	typedef aio_cb *aio_req;
		88	typedef aio_cb *aio_req_ornot;
57		89
58	static int started;	90	static int started, wanted;
59	static int nreqs;	91	static volatile int nreqs;
60	static int max_outstanding = 1<<30;	92	static int max_outstanding = 1<<30;
61	static int respipe [2];	93	static int respipe [2];
62		94
63	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	95	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
64	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	96	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
65	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	97	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66		98
67	static volatile aio_req reqs, reqe; /* queue start, queue end */	99	static volatile aio_req reqs, reqe; /* queue start, queue end */
68	static volatile aio_req ress, rese; /* queue start, queue end */	100	static volatile aio_req ress, rese; /* queue start, queue end */
69		101
		102	typedef struct aio_grp
		103	{
		104	struct aio_cb first, last;
		105	SV *callback;
		106	int busycount;
		107	} aio_grp;
		108
		109	static void aio_grp_begin (aio_grp *grp)
		110	{
		111	++grp->busycount;
		112	}
		113
		114	static void aio_grp_end (aio_grp *grp)
		115	{
		116	--grp->busycount;
		117
		118	if (grp->busycount)
		119	return;
		120
		121	SvREFCNT_dec (grp->callback);
		122	grp->callback = 0;
		123	}
		124
		125	static aio_grp *aio_grp_new ()
		126	{
		127	aio_grp *grp;
		128
		129	Newz (0, grp, 1, aio_grp);
		130	aio_grp_begin (grp);
		131
		132	return grp;
		133	}
		134
		135	/* must be called at most once */
		136	static SV *req_sv (aio_req req)
		137	{
		138	req->self = (SV *)newHV ();
		139	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		140
		141	return sv_bless (newRV_noinc (req->self), gv_stashpv (AIO_CB_KLASS, 1));
		142	}
		143
		144	static aio_req SvAIO_REQ (SV *sv)
		145	{
		146	if (!sv_derived_from (sv, AIO_CB_KLASS) \|\| !SvROK (sv))
		147	croak ("object of class " AIO_CB_KLASS " expected");
		148
		149	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		150
		151	return mg ? (aio_req)mg->mg_ptr : 0;
		152	}
		153
		154	static void req_free (aio_req req)
		155	{
		156	if (req->self)
		157	{
		158	sv_unmagic (req->self, PERL_MAGIC_ext);
		159	SvREFCNT_dec (req->self);
		160	}
		161
		162	if (req->data)
		163	SvREFCNT_dec (req->data);
		164
		165	if (req->fh)
		166	SvREFCNT_dec (req->fh);
		167
		168	if (req->fh2)
		169	SvREFCNT_dec (req->fh2);
		170
		171	if (req->statdata)
		172	Safefree (req->statdata);
		173
		174	if (req->callback)
		175	SvREFCNT_dec (req->callback);
		176
		177	if (req->type == REQ_READDIR && req->result >= 0)
		178	free (req->data2ptr);
		179
		180	Safefree (req);
		181	}
		182
70	static void	183	static void
71	poll_wait ()	184	poll_wait ()
72	{	185	{
73	if (!nreqs)	186	if (nreqs && !ress)
74	return;	187	{
75
76	fd_set rfd;	188	fd_set rfd;
77	FD_ZERO(&rfd);	189	FD_ZERO(&rfd);
78	FD_SET(respipe [0], &rfd);	190	FD_SET(respipe [0], &rfd);
79		191
80	select (respipe [0] + 1, &rfd, 0, 0, 0);	192	select (respipe [0] + 1, &rfd, 0, 0, 0);
		193	}
81	}	194	}
82		195
83	static int	196	static int
84	poll_cb ()	197	poll_cb ()
85	{	198	{
86	dSP;	199	dSP;
87	int count = 0;	200	int count = 0;
		201	int do_croak = 0;
88	aio_req req;	202	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		203
97	for (;;)	204	for (;;)
98	{	205	{
99	pthread_mutex_lock (&reslock);	206	pthread_mutex_lock (&reslock);
100
101	req = ress;	207	req = ress;
102		208
103	if (ress)	209	if (req)
104	{	210	{
105	ress = ress->next;	211	ress = req->next;
		212
106	if (!ress) rese = 0;	213	if (!ress)
		214	{
		215	/* read any signals sent by the worker threads */
		216	char buf [32];
		217	while (read (respipe [0], buf, 32) == 32)
		218	;
		219
		220	rese = 0;
		221	}
107	}	222	}
108		223
109	pthread_mutex_unlock (&reslock);	224	pthread_mutex_unlock (&reslock);
110		225
111	if (!req)	226	if (!req)
119	{	234	{
120	int errorno = errno;	235	int errorno = errno;
121	errno = req->errorno;	236	errno = req->errorno;
122		237
123	if (req->type == REQ_READ)	238	if (req->type == REQ_READ)
124	SvCUR_set (req->data, req->dataoffset	239	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
125	+ req->result > 0 ? req->result : 0);
126		240
		241	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
		242	SvREADONLY_off (req->data);
		243
127	if (req->data)	244	if (req->statdata)
128	SvREFCNT_dec (req->data);
129
130	if (req->type == REQ_STAT \|\| req->type == REQ_LSTAT \|\| req->type == REQ_FSTAT)
131	{	245	{
132	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	246	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
133	PL_laststatval = req->result;	247	PL_laststatval = req->result;
134	PL_statcache = *(req->statdata);	248	PL_statcache = *(req->statdata);
135
136	Safefree (req->statdata);
137	}	249	}
138		250
		251	ENTER;
139	PUSHMARK (SP);	252	PUSHMARK (SP);
140	XPUSHs (sv_2mortal (newSViv (req->result)));
141		253
142	if (req->type == REQ_OPEN)	254	if (req->type == REQ_READDIR)
143	{	255	{
144	/* convert fd to fh */	256	SV *rv = &PL_sv_undef;
145	SV *fh;
146		257
147	PUTBACK;	258	if (req->result >= 0)
148	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);	259	{
149	SPAGAIN;	260	char *buf = req->data2ptr;
		261	AV *av = newAV ();
150		262
151	fh = POPs;	263	while (req->result)
		264	{
		265	SV *sv = newSVpv (buf, 0);
152		266
153	PUSHMARK (SP);	267	av_push (av, sv);
		268	buf += SvCUR (sv) + 1;
		269	req->result--;
		270	}
		271
		272	rv = sv_2mortal (newRV_noinc ((SV *)av));
		273	}
		274
154	XPUSHs (fh);	275	XPUSHs (rv);
155	}	276	}
		277	else
		278	{
		279	XPUSHs (sv_2mortal (newSViv (req->result)));
156		280
		281	if (req->type == REQ_OPEN)
		282	{
		283	/* convert fd to fh */
		284	SV *fh;
		285
		286	PUTBACK;
		287	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		288	SPAGAIN;
		289
		290	fh = SvREFCNT_inc (POPs);
		291
		292	PUSHMARK (SP);
		293	XPUSHs (sv_2mortal (fh));
		294	}
		295	}
		296
157	if (SvOK (req->callback))	297	if (SvOK (req->callback) && !req->cancelled)
158	{	298	{
159	PUTBACK;	299	PUTBACK;
160	call_sv (req->callback, G_VOID \| G_EVAL);	300	call_sv (req->callback, G_VOID \| G_EVAL);
161	SPAGAIN;	301	SPAGAIN;
		302
		303	if (SvTRUE (ERRSV))
		304	{
		305	req_free (req);
		306	croak (0);
		307	}
162	}	308	}
		309
163		310	LEAVE;
164	if (req->callback)
165	SvREFCNT_dec (req->callback);
166		311
167	errno = errorno;	312	errno = errorno;
168	count++;	313	count++;
169	}	314	}
170		315
171	Safefree (req);	316	req_free (req);
172	}	317	}
173		318
174	return count;	319	return count;
175	}	320	}
176		321
…		…
195		340
196	sigprocmask (SIG_SETMASK, &oldsigset, 0);	341	sigprocmask (SIG_SETMASK, &oldsigset, 0);
197	}	342	}
198		343
199	static void	344	static void
200	send_req (aio_req req)	345	req_send (aio_req req)
201	{	346	{
		347	while (started < wanted && nreqs >= started)
		348	start_thread ();
		349
202	nreqs++;	350	nreqs++;
203		351
204	pthread_mutex_lock (&reqlock);	352	pthread_mutex_lock (&reqlock);
205		353
206	req->next = 0;	354	req->next = 0;
…		…
214	reqe = reqs = req;	362	reqe = reqs = req;
215		363
216	pthread_cond_signal (&reqwait);	364	pthread_cond_signal (&reqwait);
217	pthread_mutex_unlock (&reqlock);	365	pthread_mutex_unlock (&reqlock);
218		366
219	while (nreqs > max_outstanding)	367	if (nreqs > max_outstanding)
		368	for (;;)
		369	{
		370	poll_cb ();
		371
		372	if (nreqs <= max_outstanding)
		373	break;
		374
		375	poll_wait ();
		376	}
		377	}
		378
		379	static void
		380	end_thread (void)
		381	{
		382	aio_req req;
		383	Newz (0, req, 1, aio_cb);
		384	req->type = REQ_QUIT;
		385
		386	req_send (req);
		387	}
		388
		389	static void min_parallel (int nthreads)
		390	{
		391	if (wanted < nthreads)
		392	wanted = nthreads;
		393	}
		394
		395	static void max_parallel (int nthreads)
		396	{
		397	int cur = started;
		398
		399	if (wanted > nthreads)
		400	wanted = nthreads;
		401
		402	while (cur > wanted)
		403	{
		404	end_thread ();
		405	cur--;
		406	}
		407
		408	while (started > wanted)
220	{	409	{
221	poll_wait ();	410	poll_wait ();
222	poll_cb ();	411	poll_cb ();
223	}	412	}
224	}	413	}
225		414
226	static void	415	static void create_pipe ()
227	end_thread (void)
228	{	416	{
229	aio_req req;	417	if (pipe (respipe))
230	New (0, req, 1, aio_cb);	418	croak ("unable to initialize result pipe");
231	req->type = REQ_QUIT;
232		419
233	send_req (req);	420	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
234	}	421	croak ("cannot set result pipe to nonblocking mode");
235		422
236	static void	423	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
237	read_write (int dowrite, int fd, off_t offset, size_t length,	424	croak ("cannot set result pipe to nonblocking mode");
238	SV data, STRLEN dataoffset, SV callback)	425	}
239	{
240	aio_req req;
241	STRLEN svlen;
242	char *svptr = SvPV (data, svlen);
243		426
244	SvUPGRADE (data, SVt_PV);	427	/*****************************************************************************/
245	SvPOK_on (data);	428	/* work around various missing functions */
246		429
247	if (dataoffset < 0)	430	#if !HAVE_PREADWRITE
		431	# define pread aio_pread
		432	# define pwrite aio_pwrite
		433
		434	/*
		435	* make our pread/pwrite safe against themselves, but not against
		436	* normal read/write by using a mutex. slows down execution a lot,
		437	* but that's your problem, not mine.
		438	*/
		439	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
		440
		441	static ssize_t
		442	pread (int fd, void *buf, size_t count, off_t offset)
		443	{
		444	ssize_t res;
		445	off_t ooffset;
		446
		447	pthread_mutex_lock (&preadwritelock);
		448	ooffset = lseek (fd, 0, SEEK_CUR);
		449	lseek (fd, offset, SEEK_SET);
		450	res = read (fd, buf, count);
		451	lseek (fd, ooffset, SEEK_SET);
		452	pthread_mutex_unlock (&preadwritelock);
		453
		454	return res;
		455	}
		456
		457	static ssize_t
		458	pwrite (int fd, void *buf, size_t count, off_t offset)
		459	{
		460	ssize_t res;
		461	off_t ooffset;
		462
		463	pthread_mutex_lock (&preadwritelock);
		464	ooffset = lseek (fd, 0, SEEK_CUR);
		465	lseek (fd, offset, SEEK_SET);
		466	res = write (fd, buf, count);
		467	lseek (fd, offset, SEEK_SET);
		468	pthread_mutex_unlock (&preadwritelock);
		469
		470	return res;
		471	}
		472	#endif
		473
		474	#if !HAVE_FDATASYNC
		475	# define fdatasync fsync
		476	#endif
		477
		478	#if !HAVE_READAHEAD
		479	# define readahead aio_readahead
		480
		481	static ssize_t
		482	readahead (int fd, off_t offset, size_t count)
		483	{
		484	char readahead_buf[4096];
		485
		486	while (count > 0)
		487	{
		488	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
		489
		490	pread (fd, readahead_buf, len, offset);
248	dataoffset += svlen;	491	offset += len;
249		492	count -= len;
250	if (dataoffset < 0 \|\| dataoffset > svlen)
251	croak ("data offset outside of string");
252
253	if (dowrite)
254	{	493	}
255	/* write: check length and adjust. */	494
256	if (length < 0 \|\| length + dataoffset > svlen)	495	errno = 0;
257	length = svlen - dataoffset;	496	}
		497	#endif
		498
		499	#if !HAVE_READDIR_R
		500	# define readdir_r aio_readdir_r
		501
		502	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		503
		504	static int
		505	readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
		506	{
		507	struct dirent *e;
		508	int errorno;
		509
		510	pthread_mutex_lock (&readdirlock);
		511
		512	e = readdir (dirp);
		513	errorno = errno;
		514
		515	if (e)
		516	{
		517	*res = ent;
		518	strcpy (ent->d_name, e->d_name);
258	}	519	}
259	else	520	else
		521	*res = 0;
		522
		523	pthread_mutex_unlock (&readdirlock);
		524
		525	errno = errorno;
		526	return e ? 0 : -1;
		527	}
		528	#endif
		529
		530	/* sendfile always needs emulation */
		531	static ssize_t
		532	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
		533	{
		534	ssize_t res;
		535
		536	if (!count)
		537	return 0;
		538
		539	#if HAVE_SENDFILE
		540	# if __linux
		541	res = sendfile (ofd, ifd, &offset, count);
		542
		543	# elif __freebsd
		544	/*
		545	* Of course, the freebsd sendfile is a dire hack with no thoughts
		546	* wasted on making it similar to other I/O functions.
		547	*/
260	{	548	{
261	/* read: grow scalar as necessary */	549	off_t sbytes;
262	svptr = SvGROW (data, length + dataoffset);	550	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		551
		552	if (res < 0 && sbytes)
		553	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
		554	res = sbytes;
		555	}
		556
		557	# elif __hpux
		558	res = sendfile (ofd, ifd, offset, count, 0, 0);
		559
		560	# elif __solaris
		561	{
		562	struct sendfilevec vec;
		563	size_t sbytes;
		564
		565	vec.sfv_fd = ifd;
		566	vec.sfv_flag = 0;
		567	vec.sfv_off = offset;
		568	vec.sfv_len = count;
		569
		570	res = sendfilev (ofd, &vec, 1, &sbytes);
		571
		572	if (res < 0 && sbytes)
		573	res = sbytes;
		574	}
		575
		576	# endif
		577	#else
		578	res = -1;
		579	errno = ENOSYS;
		580	#endif
		581
		582	if (res < 0
		583	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK
		584	#if __solaris
		585	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE
		586	#endif
		587	)
		588	)
263	}	589	{
		590	/* emulate sendfile. this is a major pain in the ass */
		591	char buf[4096];
		592	res = 0;
264		593
265	if (length < 0)	594	while (count)
266	croak ("length must not be negative");	595	{
		596	ssize_t cnt;
		597
		598	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
267		599
268	Newz (0, req, 1, aio_cb);	600	if (cnt <= 0)
		601	{
		602	if (cnt && !res) res = -1;
		603	break;
		604	}
269		605
		606	cnt = write (ofd, buf, cnt);
		607
		608	if (cnt <= 0)
		609	{
		610	if (cnt && !res) res = -1;
		611	break;
		612	}
		613
		614	offset += cnt;
		615	res += cnt;
		616	count -= cnt;
		617	}
		618	}
		619
		620	return res;
		621	}
		622
		623	/* read a full directory */
		624	static int
		625	scandir_ (const char path, void *namesp)
		626	{
		627	DIR *dirp = opendir (path);
		628	union
		629	{
		630	struct dirent d;
		631	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		632	} u;
		633	struct dirent *entp;
		634	char name, names;
		635	int memlen = 4096;
		636	int memofs = 0;
		637	int res = 0;
		638	int errorno;
		639
270	if (!req)	640	if (!dirp)
271	croak ("out of memory during aio_req allocation");	641	return -1;
272		642
273	req->type = dowrite ? REQ_WRITE : REQ_READ;	643	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		644
281	send_req (req);	645	for (;;)
		646	{
		647	errno = 0, readdir_r (dirp, &u.d, &entp);
		648
		649	if (!entp)
		650	break;
		651
		652	name = entp->d_name;
		653
		654	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
		655	{
		656	int len = strlen (name) + 1;
		657
		658	res++;
		659
		660	while (memofs + len > memlen)
		661	{
		662	memlen *= 2;
		663	names = realloc (names, memlen);
		664	if (!names)
		665	break;
		666	}
		667
		668	memcpy (names + memofs, name, len);
		669	memofs += len;
		670	}
		671	}
		672
		673	errorno = errno;
		674	closedir (dirp);
		675
		676	if (errorno)
		677	{
		678	free (names);
		679	errno = errorno;
		680	res = -1;
		681	}
		682
		683	namesp = (void )names;
		684	return res;
282	}	685	}
		686
		687	/*****************************************************************************/
283		688
284	static void *	689	static void *
285	aio_proc (void *thr_arg)	690	aio_proc (void *thr_arg)
286	{	691	{
287	aio_req req;	692	aio_req req;
…		…
309		714
310	pthread_mutex_unlock (&reqlock);	715	pthread_mutex_unlock (&reqlock);
311		716
312	errno = 0; /* strictly unnecessary */	717	errno = 0; /* strictly unnecessary */
313		718
314	type = req->type;	719	if (!req->cancelled)
315
316	switch (type)	720	switch (req->type)
317	{	721	{
318	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	722	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;	723	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
320	#if SYS_readahead	724
321	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	725	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
322	#else	726	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		727
326	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	728	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
327	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	729	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
328	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	730	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
329		731
330	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	732	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
331	case REQ_CLOSE: req->result = close (req->fd); break;	733	case REQ_CLOSE: req->result = close (req->fd); break;
332	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	734	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
333
334	case REQ_FSYNC: req->result = fsync (req->fd); break;	735	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		736	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		737	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
		738	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		739
335	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	740	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
		741	case REQ_FSYNC: req->result = fsync (req->fd); break;
		742	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
336		743
337	case REQ_QUIT:	744	case REQ_QUIT:
338	break;	745	break;
339		746
340	default:	747	default:
341	req->result = ENOSYS;	748	req->result = ENOSYS;
342	break;	749	break;
343	}	750	}
344		751
345	req->errorno = errno;	752	req->errorno = errno;
346		753
347	pthread_mutex_lock (&reslock);	754	pthread_mutex_lock (&reslock);
348		755
…		…
366	while (type != REQ_QUIT);	773	while (type != REQ_QUIT);
367		774
368	return 0;	775	return 0;
369	}	776	}
370		777
		778	/*****************************************************************************/
		779
		780	static void atfork_prepare (void)
		781	{
		782	pthread_mutex_lock (&reqlock);
		783	pthread_mutex_lock (&reslock);
		784	#if !HAVE_PREADWRITE
		785	pthread_mutex_lock (&preadwritelock);
		786	#endif
		787	#if !HAVE_READDIR_R
		788	pthread_mutex_lock (&readdirlock);
		789	#endif
		790	}
		791
		792	static void atfork_parent (void)
		793	{
		794	#if !HAVE_READDIR_R
		795	pthread_mutex_unlock (&readdirlock);
		796	#endif
		797	#if !HAVE_PREADWRITE
		798	pthread_mutex_unlock (&preadwritelock);
		799	#endif
		800	pthread_mutex_unlock (&reslock);
		801	pthread_mutex_unlock (&reqlock);
		802	}
		803
		804	static void atfork_child (void)
		805	{
		806	aio_req prv;
		807
		808	started = 0;
		809
		810	while (reqs)
		811	{
		812	prv = reqs;
		813	reqs = prv->next;
		814	req_free (prv);
		815	}
		816
		817	reqs = reqe = 0;
		818
		819	while (ress)
		820	{
		821	prv = ress;
		822	ress = prv->next;
		823	req_free (prv);
		824	}
		825
		826	ress = rese = 0;
		827
		828	close (respipe [0]);
		829	close (respipe [1]);
		830	create_pipe ();
		831
		832	atfork_parent ();
		833	}
		834
		835	#define dREQ \
		836	aio_req req; \
		837	\
		838	if (SvOK (callback) && !SvROK (callback)) \
		839	croak ("callback must be undef or of reference type"); \
		840	\
		841	Newz (0, req, 1, aio_cb); \
		842	if (!req) \
		843	croak ("out of memory during aio_req allocation"); \
		844	\
		845	req->callback = newSVsv (callback)
		846
		847	#define REQ_SEND \
		848	req_send (req); \
		849	\
		850	if (GIMME_V != G_VOID) \
		851	XPUSHs (req_sv (req));
		852
371	MODULE = IO::AIO PACKAGE = IO::AIO	853	MODULE = IO::AIO PACKAGE = IO::AIO
372		854
373	PROTOTYPES: ENABLE	855	PROTOTYPES: ENABLE
374		856
375	BOOT:	857	BOOT:
376	{	858	{
377	if (pipe (respipe))	859	HV *stash = gv_stashpv ("IO::AIO", 1);
378	croak ("unable to initialize result pipe");	860	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		861	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		862	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
379		863
380	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	864	create_pipe ();
381	croak ("cannot set result pipe to nonblocking mode");	865	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	}	866	}
386		867
387	void	868	void
388	min_parallel(nthreads)	869	min_parallel (nthreads)
389	int nthreads	870	int nthreads
390	PROTOTYPE: $	871	PROTOTYPE: $
391	CODE:
392	while (nthreads > started)
393	start_thread ();
394		872
395	void	873	void
396	max_parallel(nthreads)	874	max_parallel (nthreads)
397	int nthreads	875	int nthreads
398	PROTOTYPE: $	876	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		877
415	int	878	int
416	max_outstanding(nreqs)	879	max_outstanding (nreqs)
417	int nreqs	880	int nreqs
418	PROTOTYPE: $	881	PROTOTYPE: $
419	CODE:	882	CODE:
420	RETVAL = max_outstanding;	883	RETVAL = max_outstanding;
421	max_outstanding = nreqs;	884	max_outstanding = nreqs;
422		885
423	void	886	void
424	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	887	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
425	SV * pathname	888	SV * pathname
426	int flags	889	int flags
427	int mode	890	int mode
428	SV * callback	891	SV * callback
429	PROTOTYPE: $$$;$	892	PROTOTYPE: $$$;$
430	CODE:	893	PPCODE:
431	{	894	{
432	aio_req req;	895	dREQ;
433
434	Newz (0, req, 1, aio_cb);
435
436	if (!req)
437	croak ("out of memory during aio_req allocation");
438		896
439	req->type = REQ_OPEN;	897	req->type = REQ_OPEN;
440	req->data = newSVsv (pathname);	898	req->data = newSVsv (pathname);
441	req->dataptr = SvPV_nolen (req->data);	899	req->dataptr = SvPVbyte_nolen (req->data);
442	req->fd = flags;	900	req->fd = flags;
443	req->mode = mode;	901	req->mode = mode;
444	req->callback = SvREFCNT_inc (callback);
445		902
446	send_req (req);	903	REQ_SEND;
447	}	904	}
448		905
449	void	906	void
450	aio_close(fh,callback=&PL_sv_undef)	907	aio_close (fh,callback=&PL_sv_undef)
451	InputStream fh	908	SV * fh
452	SV * callback	909	SV * callback
453	PROTOTYPE: $;$	910	PROTOTYPE: $;$
454	ALIAS:	911	ALIAS:
455	aio_close = REQ_CLOSE	912	aio_close = REQ_CLOSE
456	aio_fsync = REQ_FSYNC	913	aio_fsync = REQ_FSYNC
457	aio_fdatasync = REQ_FDATASYNC	914	aio_fdatasync = REQ_FDATASYNC
458	CODE:	915	PPCODE:
		916	{
		917	dREQ;
		918
		919	req->type = ix;
		920	req->fh = newSVsv (fh);
		921	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
		922
		923	REQ_SEND (req);
		924	}
		925
		926	void
		927	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
		928	SV * fh
		929	UV offset
		930	UV length
		931	SV * data
		932	UV dataoffset
		933	SV * callback
		934	ALIAS:
		935	aio_read = REQ_READ
		936	aio_write = REQ_WRITE
		937	PROTOTYPE: $$$$$;$
		938	PPCODE:
459	{	939	{
460	aio_req req;	940	aio_req req;
		941	STRLEN svlen;
		942	char *svptr = SvPVbyte (data, svlen);
461		943
462	Newz (0, req, 1, aio_cb);	944	SvUPGRADE (data, SVt_PV);
		945	SvPOK_on (data);
463		946
464	if (!req)	947	if (dataoffset < 0)
465	croak ("out of memory during aio_req allocation");	948	dataoffset += svlen;
466		949
467	req->type = ix;	950	if (dataoffset < 0 \|\| dataoffset > svlen)
468	req->fd = PerlIO_fileno (fh);	951	croak ("data offset outside of string");
469	req->callback = SvREFCNT_inc (callback);
470		952
471	send_req (req);	953	if (ix == REQ_WRITE)
472	}	954	{
473		955	/* write: check length and adjust. */
474	void	956	if (length < 0 \|\| length + dataoffset > svlen)
475	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	957	length = svlen - dataoffset;
476	InputStream fh	958	}
477	UV offset	959	else
478	IV length	960	{
479	SV * data	961	/* read: grow scalar as necessary */
480	IV dataoffset	962	svptr = SvGROW (data, length + dataoffset);
481	SV * callback	963	}
482	PROTOTYPE: $$$$$;$
483	CODE:
484	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
485
486	void
487	aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
488	OutputStream fh
489	UV offset
490	IV length
491	SV * data
492	IV dataoffset
493	SV * callback
494	PROTOTYPE: $$$$$;$
495	CODE:
496	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
497
498	void
499	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
500	InputStream fh
501	UV offset
502	IV length
503	SV * callback
504	PROTOTYPE: $$$;$
505	CODE:
506	{
507	aio_req req;
508		964
509	if (length < 0)	965	if (length < 0)
510	croak ("length must not be negative");	966	croak ("length must not be negative");
511		967
512	Newz (0, req, 1, aio_cb);	968	{
		969	dREQ;
513		970
514	if (!req)	971	req->type = ix;
515	croak ("out of memory during aio_req allocation");	972	req->fh = newSVsv (fh);
		973	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
		974	: IoOFP (sv_2io (fh)));
		975	req->offset = offset;
		976	req->length = length;
		977	req->data = SvREFCNT_inc (data);
		978	req->dataptr = (char *)svptr + dataoffset;
		979
		980	if (!SvREADONLY (data))
		981	{
		982	SvREADONLY_on (data);
		983	req->data2ptr = (void *)data;
		984	}
		985
		986	REQ_SEND;
		987	}
		988	}
		989
		990	void
		991	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		992	SV * out_fh
		993	SV * in_fh
		994	UV in_offset
		995	UV length
		996	SV * callback
		997	PROTOTYPE: $$$$;$
		998	PPCODE:
		999	{
		1000	dREQ;
		1001
		1002	req->type = REQ_SENDFILE;
		1003	req->fh = newSVsv (out_fh);
		1004	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1005	req->fh2 = newSVsv (in_fh);
		1006	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1007	req->offset = in_offset;
		1008	req->length = length;
		1009
		1010	REQ_SEND;
		1011	}
		1012
		1013	void
		1014	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
		1015	SV * fh
		1016	UV offset
		1017	IV length
		1018	SV * callback
		1019	PROTOTYPE: $$$;$
		1020	PPCODE:
		1021	{
		1022	dREQ;
516		1023
517	req->type = REQ_READAHEAD;	1024	req->type = REQ_READAHEAD;
		1025	req->fh = newSVsv (fh);
518	req->fd = PerlIO_fileno (fh);	1026	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
519	req->offset = offset;	1027	req->offset = offset;
520	req->length = length;	1028	req->length = length;
521	req->callback = SvREFCNT_inc (callback);
522		1029
523	send_req (req);	1030	REQ_SEND;
524	}	1031	}
525		1032
526	void	1033	void
527	aio_stat(fh_or_path,callback=&PL_sv_undef)	1034	aio_stat (fh_or_path,callback=&PL_sv_undef)
528	SV * fh_or_path	1035	SV * fh_or_path
529	SV * callback	1036	SV * callback
530	ALIAS:	1037	ALIAS:
531	aio_stat = REQ_STAT	1038	aio_stat = REQ_STAT
532	aio_lstat = REQ_LSTAT	1039	aio_lstat = REQ_LSTAT
533	CODE:	1040	PPCODE:
534	{	1041	{
535	aio_req req;	1042	dREQ;
536
537	Newz (0, req, 1, aio_cb);
538
539	if (!req)
540	croak ("out of memory during aio_req allocation");
541		1043
542	New (0, req->statdata, 1, Stat_t);	1044	New (0, req->statdata, 1, Stat_t);
543
544	if (!req->statdata)	1045	if (!req->statdata)
		1046	{
		1047	req_free (req);
545	croak ("out of memory during aio_req->statdata allocation");	1048	croak ("out of memory during aio_req->statdata allocation");
		1049	}
546		1050
547	if (SvPOK (fh_or_path))	1051	if (SvPOK (fh_or_path))
548	{	1052	{
549	req->type = ix;	1053	req->type = ix;
550	req->data = newSVsv (fh_or_path);	1054	req->data = newSVsv (fh_or_path);
551	req->dataptr = SvPV_nolen (req->data);	1055	req->dataptr = SvPVbyte_nolen (req->data);
552	}	1056	}
553	else	1057	else
554	{	1058	{
555	req->type = REQ_FSTAT;	1059	req->type = REQ_FSTAT;
		1060	req->fh = newSVsv (fh_or_path);
556	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1061	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
557	}	1062	}
558		1063
559	req->callback = SvREFCNT_inc (callback);	1064	REQ_SEND;
560
561	send_req (req);
562	}	1065	}
563		1066
564	void	1067	void
565	aio_unlink(pathname,callback=&PL_sv_undef)	1068	aio_unlink (pathname,callback=&PL_sv_undef)
566	SV * pathname	1069	SV * pathname
567	SV * callback	1070	SV * callback
		1071	ALIAS:
		1072	aio_unlink = REQ_UNLINK
		1073	aio_rmdir = REQ_RMDIR
		1074	aio_readdir = REQ_READDIR
568	CODE:	1075	PPCODE:
569	{	1076	{
570	aio_req req;	1077	dREQ;
571		1078
572	Newz (0, req, 1, aio_cb);	1079	req->type = ix;
		1080	req->data = newSVsv (pathname);
		1081	req->dataptr = SvPVbyte_nolen (req->data);
573		1082
574	if (!req)	1083	REQ_SEND;
575	croak ("out of memory during aio_req allocation");	1084	}
		1085
		1086	void
		1087	aio_link (oldpath,newpath,callback=&PL_sv_undef)
		1088	SV * oldpath
		1089	SV * newpath
		1090	SV * callback
		1091	ALIAS:
		1092	aio_link = REQ_LINK
		1093	aio_symlink = REQ_SYMLINK
		1094	aio_rename = REQ_RENAME
		1095	PPCODE:
		1096	{
		1097	dREQ;
576		1098
577	req->type = REQ_UNLINK;	1099	req->type = ix;
		1100	req->fh = newSVsv (oldpath);
		1101	req->data2ptr = SvPVbyte_nolen (req->fh);
578	req->data = newSVsv (pathname);	1102	req->data = newSVsv (newpath);
579	req->dataptr = SvPV_nolen (req->data);	1103	req->dataptr = SvPVbyte_nolen (req->data);
580	req->callback = SvREFCNT_inc (callback);
581		1104
582	send_req (req);	1105	REQ_SEND;
583	}	1106	}
584		1107
		1108	#if 0
		1109
		1110	# undocumented, because it does not cancel active requests
585	void	1111	void
		1112	cancel_most_requests ()
		1113	PROTOTYPE:
		1114	CODE:
		1115	{
		1116	aio_req *req;
		1117
		1118	pthread_mutex_lock (&reqlock);
		1119	for (req = reqs; req; req = req->next)
		1120	req->flags \|= 1;
		1121	pthread_mutex_unlock (&reqlock);
		1122
		1123	pthread_mutex_lock (&reslock);
		1124	for (req = ress; req; req = req->next)
		1125	req->flags \|= 1;
		1126	pthread_mutex_unlock (&reslock);
		1127	}
		1128
		1129	#endif
		1130
		1131	void
586	flush()	1132	flush ()
587	PROTOTYPE:	1133	PROTOTYPE:
588	CODE:	1134	CODE:
589	while (nreqs)	1135	while (nreqs)
590	{	1136	{
591	poll_wait ();	1137	poll_wait ();
…		…
631	CODE:	1177	CODE:
632	RETVAL = nreqs;	1178	RETVAL = nreqs;
633	OUTPUT:	1179	OUTPUT:
634	RETVAL	1180	RETVAL
635		1181
		1182	MODULE = IO::AIO PACKAGE = IO::AIO::CB
		1183
		1184	void
		1185	cancel (aio_req_ornot req)
		1186	PROTOTYPE:
		1187	CODE:
		1188	req->cancelled = 1;
		1189

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing IO-AIO/AIO.xs (file contents): Revision 1.10 by root, Wed Jul 13 00:13:09 2005 UTC vs. Revision 1.43 by root, Sat Oct 21 23:06:04 2006 UTC

Diff Legend

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.10 by root, Wed Jul 13 00:13:09 2005 UTC vs.
Revision 1.43 by root, Sat Oct 21 23:06:04 2006 UTC