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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.5 by root, Sun Jul 10 23:45:16 2005 UTC vs.
Revision 1.42 by root, Fri Jul 21 07:35:31 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>
5	#include <sys/types.h>	14	#include <sys/types.h>
6	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <limits.h>
7	#include <unistd.h>	17	#include <unistd.h>
8	#include <fcntl.h>	18	#include <fcntl.h>
9	#include <signal.h>	19	#include <signal.h>
10	#include <sched.h>	20	#include <sched.h>
11	#include <endian.h>
12		21
13	#include <pthread.h>	22	#if HAVE_SENDFILE
		23	# if __linux
		24	# include <sys/sendfile.h>
		25	# elif __freebsd
14	#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
		34	# endif
		35	#endif
15		36
16	typedef void InputStream; / hack, but 5.6.1 is simply toooo old ;) */	37	/* used for struct dirent, AIX doesn't provide it */
17	typedef void OutputStream; / hack, but 5.6.1 is simply toooo old ;) */	38	#ifndef NAME_MAX
18	typedef void InOutStream; / hack, but 5.6.1 is simply toooo old ;) */	39	# define NAME_MAX 4096
		40	#endif
19		41
20	#if __ia64	42	#if __ia64
21	# define STACKSIZE 65536	43	# define STACKSIZE 65536
22	#else	44	#else
23	# define STACKSIZE 4096	45	# define STACKSIZE 8192
24	#endif	46	#endif
25		47
26	enum {	48	enum {
27	REQ_QUIT,	49	REQ_QUIT,
28	REQ_OPEN, REQ_CLOSE,	50	REQ_OPEN, REQ_CLOSE,
29	REQ_READ, REQ_WRITE, REQ_READAHEAD,	51	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		52	REQ_SENDFILE,
30	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,	53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
31	REQ_FSYNC, REQ_FDATASYNC,	54	REQ_FSYNC, REQ_FDATASYNC,
		55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
		56	REQ_READDIR,
		57	REQ_LINK, REQ_SYMLINK,
32	};	58	};
33		59
34	typedef struct aio_cb {	60	typedef struct aio_cb {
35	struct aio_cb *volatile next;	61	struct aio_cb *volatile next;
36		62
37	int type;	63	int type;
38		64
		65	/* should receive a cleanup, with unions */
39	int fd;	66	int fd, fd2;
40	off_t offset;	67	off_t offset;
41	size_t length;	68	size_t length;
42	ssize_t result;	69	ssize_t result;
43	mode_t mode; /* open */	70	mode_t mode; /* open */
44	int errorno;	71	int errorno;
45	SV data, callback;	72	SV data, callback;
46	void *dataptr;	73	SV fh, fh2;
		74	void dataptr, data2ptr;
47	STRLEN dataoffset;	75	STRLEN dataoffset;
48		76
49	Stat_t *statdata;	77	Stat_t *statdata;
50	} aio_cb;	78	} aio_cb;
51		79
52	typedef aio_cb *aio_req;	80	typedef aio_cb *aio_req;
53		81
54	static int started;	82	static int started, wanted;
55	static int nreqs;	83	static volatile int nreqs;
56	static int max_outstanding = 1<<30;	84	static int max_outstanding = 1<<30;
57	static int respipe [2];	85	static int respipe [2];
58		86
59	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	87	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
60	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	88	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
61	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	89	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
62		90
63	static volatile aio_req reqs, reqe; /* queue start, queue end */	91	static volatile aio_req reqs, reqe; /* queue start, queue end */
64	static volatile aio_req ress, rese; /* queue start, queue end */	92	static volatile aio_req ress, rese; /* queue start, queue end */
65		93
		94	static void free_req (aio_req req)
		95	{
		96	if (req->data)
		97	SvREFCNT_dec (req->data);
		98
		99	if (req->fh)
		100	SvREFCNT_dec (req->fh);
		101
		102	if (req->fh2)
		103	SvREFCNT_dec (req->fh2);
		104
		105	if (req->statdata)
		106	Safefree (req->statdata);
		107
		108	if (req->callback)
		109	SvREFCNT_dec (req->callback);
		110
		111	if (req->type == REQ_READDIR && req->result >= 0)
		112	free (req->data2ptr);
		113
		114	Safefree (req);
		115	}
		116
66	static void	117	static void
67	poll_wait ()	118	poll_wait ()
68	{	119	{
69	if (!nreqs)	120	if (nreqs && !ress)
70	return;	121	{
71
72	fd_set rfd;	122	fd_set rfd;
73	FD_ZERO(&rfd);	123	FD_ZERO(&rfd);
74	FD_SET(respipe [0], &rfd);	124	FD_SET(respipe [0], &rfd);
75		125
76	select (respipe [0] + 1, &rfd, 0, 0, 0);	126	select (respipe [0] + 1, &rfd, 0, 0, 0);
		127	}
77	}	128	}
78		129
79	static int	130	static int
80	poll_cb ()	131	poll_cb ()
81	{	132	{
82	dSP;	133	dSP;
83	int count = 0;	134	int count = 0;
		135	int do_croak = 0;
84	aio_req req;	136	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		137
93	for (;;)	138	for (;;)
94	{	139	{
95	pthread_mutex_lock (&reslock);	140	pthread_mutex_lock (&reslock);
96
97	req = ress;	141	req = ress;
98		142
99	if (ress)	143	if (req)
100	{	144	{
101	ress = ress->next;	145	ress = req->next;
		146
102	if (!ress) rese = 0;	147	if (!ress)
		148	{
		149	/* read any signals sent by the worker threads */
		150	char buf [32];
		151	while (read (respipe [0], buf, 32) == 32)
		152	;
		153
		154	rese = 0;
		155	}
103	}	156	}
104		157
105	pthread_mutex_unlock (&reslock);	158	pthread_mutex_unlock (&reslock);
106		159
107	if (!req)	160	if (!req)
115	{	168	{
116	int errorno = errno;	169	int errorno = errno;
117	errno = req->errorno;	170	errno = req->errorno;
118		171
119	if (req->type == REQ_READ)	172	if (req->type == REQ_READ)
120	SvCUR_set (req->data, req->dataoffset	173	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
121	+ req->result > 0 ? req->result : 0);
122		174
		175	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
		176	SvREADONLY_off (req->data);
		177
123	if (req->data)	178	if (req->statdata)
124	SvREFCNT_dec (req->data);
125
126	if (req->type == REQ_STAT \|\| req->type == REQ_LSTAT \|\| req->type == REQ_FSTAT)
127	{	179	{
128	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	180	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
129	PL_laststatval = req->result;	181	PL_laststatval = req->result;
130	PL_statcache = *(req->statdata);	182	PL_statcache = *(req->statdata);
131
132	Safefree (req->statdata);
133	}	183	}
134		184
		185	ENTER;
135	PUSHMARK (SP);	186	PUSHMARK (SP);
136	XPUSHs (sv_2mortal (newSViv (req->result)));
137		187
138	if (req->type == REQ_OPEN)	188	if (req->type == REQ_READDIR)
139	{	189	{
		190	SV *rv = &PL_sv_undef;
		191
		192	if (req->result >= 0)
		193	{
		194	char *buf = req->data2ptr;
		195	AV *av = newAV ();
		196
		197	while (req->result)
		198	{
		199	SV *sv = newSVpv (buf, 0);
		200
		201	av_push (av, sv);
		202	buf += SvCUR (sv) + 1;
		203	req->result--;
		204	}
		205
		206	rv = sv_2mortal (newRV_noinc ((SV *)av));
		207	}
		208
		209	XPUSHs (rv);
		210	}
		211	else
		212	{
		213	XPUSHs (sv_2mortal (newSViv (req->result)));
		214
		215	if (req->type == REQ_OPEN)
		216	{
140	/* convert fd to fh */	217	/* convert fd to fh */
141	SV *fh;	218	SV *fh;
142		219
		220	PUTBACK;
		221	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		222	SPAGAIN;
		223
		224	fh = SvREFCNT_inc (POPs);
		225
		226	PUSHMARK (SP);
		227	XPUSHs (sv_2mortal (fh));
		228	}
		229	}
		230
		231	if (SvOK (req->callback))
		232	{
143	PUTBACK;	233	PUTBACK;
144	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);	234	call_sv (req->callback, G_VOID \| G_EVAL);
145	SPAGAIN;	235	SPAGAIN;
146		236
147	fh = POPs;	237	if (SvTRUE (ERRSV))
148		238	{
149	PUSHMARK (SP);	239	free_req (req);
150	XPUSHs (fh);	240	croak (0);
		241	}
151	}	242	}
152		243
153	PUTBACK;
154	call_sv (req->callback, G_VOID \| G_EVAL);
155	SPAGAIN;
156		244	LEAVE;
157	if (req->callback)
158	SvREFCNT_dec (req->callback);
159		245
160	errno = errorno;	246	errno = errorno;
161	count++;	247	count++;
162	}	248	}
163		249
164	Safefree (req);	250	free_req (req);
165	}	251	}
166		252
167	return count;	253	return count;
168	}	254	}
169		255
…		…
190	}	276	}
191		277
192	static void	278	static void
193	send_req (aio_req req)	279	send_req (aio_req req)
194	{	280	{
		281	while (started < wanted && nreqs >= started)
		282	start_thread ();
		283
195	nreqs++;	284	nreqs++;
196		285
197	pthread_mutex_lock (&reqlock);	286	pthread_mutex_lock (&reqlock);
198		287
199	req->next = 0;	288	req->next = 0;
…		…
207	reqe = reqs = req;	296	reqe = reqs = req;
208		297
209	pthread_cond_signal (&reqwait);	298	pthread_cond_signal (&reqwait);
210	pthread_mutex_unlock (&reqlock);	299	pthread_mutex_unlock (&reqlock);
211		300
212	while (nreqs > max_outstanding)	301	if (nreqs > max_outstanding)
		302	for (;;)
		303	{
		304	poll_cb ();
		305
		306	if (nreqs <= max_outstanding)
		307	break;
		308
		309	poll_wait ();
		310	}
		311	}
		312
		313	static void
		314	end_thread (void)
		315	{
		316	aio_req req;
		317	Newz (0, req, 1, aio_cb);
		318	req->type = REQ_QUIT;
		319
		320	send_req (req);
		321	}
		322
		323	static void min_parallel (int nthreads)
		324	{
		325	if (wanted < nthreads)
		326	wanted = nthreads;
		327	}
		328
		329	static void max_parallel (int nthreads)
		330	{
		331	int cur = started;
		332
		333	if (wanted > nthreads)
		334	wanted = nthreads;
		335
		336	while (cur > wanted)
		337	{
		338	end_thread ();
		339	cur--;
		340	}
		341
		342	while (started > wanted)
213	{	343	{
214	poll_wait ();	344	poll_wait ();
215	poll_cb ();	345	poll_cb ();
216	}	346	}
217	}	347	}
218		348
219	static void	349	static void create_pipe ()
220	end_thread (void)
221	{	350	{
222	aio_req req;	351	if (pipe (respipe))
223	New (0, req, 1, aio_cb);	352	croak ("unable to initialize result pipe");
224	req->type = REQ_QUIT;
225		353
226	send_req (req);	354	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
227	}	355	croak ("cannot set result pipe to nonblocking mode");
228		356
229	static void	357	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
230	read_write (int dowrite, int fd, off_t offset, size_t length,	358	croak ("cannot set result pipe to nonblocking mode");
231	SV data, STRLEN dataoffset, SV callback)	359	}
232	{
233	aio_req req;
234	STRLEN svlen;
235	char *svptr = SvPV (data, svlen);
236		360
237	SvUPGRADE (data, SVt_PV);	361	/*****************************************************************************/
238	SvPOK_on (data);	362	/* work around various missing functions */
239		363
240	if (dataoffset < 0)	364	#if !HAVE_PREADWRITE
		365	# define pread aio_pread
		366	# define pwrite aio_pwrite
		367
		368	/*
		369	* make our pread/pwrite safe against themselves, but not against
		370	* normal read/write by using a mutex. slows down execution a lot,
		371	* but that's your problem, not mine.
		372	*/
		373	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
		374
		375	static ssize_t
		376	pread (int fd, void *buf, size_t count, off_t offset)
		377	{
		378	ssize_t res;
		379	off_t ooffset;
		380
		381	pthread_mutex_lock (&preadwritelock);
		382	ooffset = lseek (fd, 0, SEEK_CUR);
		383	lseek (fd, offset, SEEK_SET);
		384	res = read (fd, buf, count);
		385	lseek (fd, ooffset, SEEK_SET);
		386	pthread_mutex_unlock (&preadwritelock);
		387
		388	return res;
		389	}
		390
		391	static ssize_t
		392	pwrite (int fd, void *buf, size_t count, off_t offset)
		393	{
		394	ssize_t res;
		395	off_t ooffset;
		396
		397	pthread_mutex_lock (&preadwritelock);
		398	ooffset = lseek (fd, 0, SEEK_CUR);
		399	lseek (fd, offset, SEEK_SET);
		400	res = write (fd, buf, count);
		401	lseek (fd, offset, SEEK_SET);
		402	pthread_mutex_unlock (&preadwritelock);
		403
		404	return res;
		405	}
		406	#endif
		407
		408	#if !HAVE_FDATASYNC
		409	# define fdatasync fsync
		410	#endif
		411
		412	#if !HAVE_READAHEAD
		413	# define readahead aio_readahead
		414
		415	static ssize_t
		416	readahead (int fd, off_t offset, size_t count)
		417	{
		418	char readahead_buf[4096];
		419
		420	while (count > 0)
		421	{
		422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
		423
		424	pread (fd, readahead_buf, len, offset);
241	dataoffset += svlen;	425	offset += len;
242		426	count -= len;
243	if (dataoffset < 0 \|\| dataoffset > svlen)
244	croak ("data offset outside of string");
245
246	if (dowrite)
247	{	427	}
248	/* write: check length and adjust. */	428
249	if (length < 0 \|\| length + dataoffset > svlen)	429	errno = 0;
250	length = svlen - dataoffset;	430	}
		431	#endif
		432
		433	#if !HAVE_READDIR_R
		434	# define readdir_r aio_readdir_r
		435
		436	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		437
		438	static int
		439	readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
		440	{
		441	struct dirent *e;
		442	int errorno;
		443
		444	pthread_mutex_lock (&readdirlock);
		445
		446	e = readdir (dirp);
		447	errorno = errno;
		448
		449	if (e)
		450	{
		451	*res = ent;
		452	strcpy (ent->d_name, e->d_name);
251	}	453	}
252	else	454	else
		455	*res = 0;
		456
		457	pthread_mutex_unlock (&readdirlock);
		458
		459	errno = errorno;
		460	return e ? 0 : -1;
		461	}
		462	#endif
		463
		464	/* sendfile always needs emulation */
		465	static ssize_t
		466	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
		467	{
		468	ssize_t res;
		469
		470	if (!count)
		471	return 0;
		472
		473	#if HAVE_SENDFILE
		474	# if __linux
		475	res = sendfile (ofd, ifd, &offset, count);
		476
		477	# elif __freebsd
		478	/*
		479	* Of course, the freebsd sendfile is a dire hack with no thoughts
		480	* wasted on making it similar to other I/O functions.
		481	*/
253	{	482	{
254	/* read: grow scalar as necessary */	483	off_t sbytes;
255	svptr = SvGROW (data, length + dataoffset);	484	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		485
		486	if (res < 0 && sbytes)
		487	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
		488	res = sbytes;
		489	}
		490
		491	# elif __hpux
		492	res = sendfile (ofd, ifd, offset, count, 0, 0);
		493
		494	# elif __solaris
		495	{
		496	struct sendfilevec vec;
		497	size_t sbytes;
		498
		499	vec.sfv_fd = ifd;
		500	vec.sfv_flag = 0;
		501	vec.sfv_off = offset;
		502	vec.sfv_len = count;
		503
		504	res = sendfilev (ofd, &vec, 1, &sbytes);
		505
		506	if (res < 0 && sbytes)
		507	res = sbytes;
		508	}
		509
		510	# endif
		511	#else
		512	res = -1;
		513	errno = ENOSYS;
		514	#endif
		515
		516	if (res < 0
		517	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK
		518	#if __solaris
		519	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE
		520	#endif
		521	)
		522	)
256	}	523	{
		524	/* emulate sendfile. this is a major pain in the ass */
		525	char buf[4096];
		526	res = 0;
257		527
258	if (length < 0)	528	while (count)
259	croak ("length must not be negative");	529	{
		530	ssize_t cnt;
		531
		532	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
260		533
261	Newz (0, req, 1, aio_cb);	534	if (cnt <= 0)
		535	{
		536	if (cnt && !res) res = -1;
		537	break;
		538	}
262		539
		540	cnt = write (ofd, buf, cnt);
		541
		542	if (cnt <= 0)
		543	{
		544	if (cnt && !res) res = -1;
		545	break;
		546	}
		547
		548	offset += cnt;
		549	res += cnt;
		550	count -= cnt;
		551	}
		552	}
		553
		554	return res;
		555	}
		556
		557	/* read a full directory */
		558	static int
		559	scandir_ (const char path, void *namesp)
		560	{
		561	DIR *dirp = opendir (path);
		562	union
		563	{
		564	struct dirent d;
		565	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		566	} u;
		567	struct dirent *entp;
		568	char name, names;
		569	int memlen = 4096;
		570	int memofs = 0;
		571	int res = 0;
		572	int errorno;
		573
263	if (!req)	574	if (!dirp)
264	croak ("out of memory during aio_req allocation");	575	return -1;
265		576
266	req->type = dowrite ? REQ_WRITE : REQ_READ;	577	names = malloc (memlen);
267	req->fd = fd;
268	req->offset = offset;
269	req->length = length;
270	req->data = SvREFCNT_inc (data);
271	req->dataptr = (char *)svptr + dataoffset;
272	req->callback = SvREFCNT_inc (callback);
273		578
274	send_req (req);	579	for (;;)
		580	{
		581	errno = 0, readdir_r (dirp, &u.d, &entp);
		582
		583	if (!entp)
		584	break;
		585
		586	name = entp->d_name;
		587
		588	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
		589	{
		590	int len = strlen (name) + 1;
		591
		592	res++;
		593
		594	while (memofs + len > memlen)
		595	{
		596	memlen *= 2;
		597	names = realloc (names, memlen);
		598	if (!names)
		599	break;
		600	}
		601
		602	memcpy (names + memofs, name, len);
		603	memofs += len;
		604	}
		605	}
		606
		607	errorno = errno;
		608	closedir (dirp);
		609
		610	if (errorno)
		611	{
		612	free (names);
		613	errno = errorno;
		614	res = -1;
		615	}
		616
		617	namesp = (void )names;
		618	return res;
275	}	619	}
		620
		621	/*****************************************************************************/
276		622
277	static void *	623	static void *
278	aio_proc (void *thr_arg)	624	aio_proc (void *thr_arg)
279	{	625	{
280	aio_req req;	626	aio_req req;
…		…
306		652
307	type = req->type;	653	type = req->type;
308		654
309	switch (type)	655	switch (type)
310	{	656	{
311	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;	657	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
312	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;	658	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
313	#if SYS_readahead	659
314	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	660	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
315	#else	661	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
316	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
317	#endif
318		662
319	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	663	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
320	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	664	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
321	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	665	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
322		666
323	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	667	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
324	case REQ_CLOSE: req->result = close (req->fd); break;	668	case REQ_CLOSE: req->result = close (req->fd); break;
325	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	669	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
		670	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		671	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		672	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
		673	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
326		674
		675	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
327	case REQ_FSYNC: req->result = fsync (req->fd); break;	676	case REQ_FSYNC: req->result = fsync (req->fd); break;
328	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	677	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
329		678
330	case REQ_QUIT:	679	case REQ_QUIT:
331	break;	680	break;
332		681
333	default:	682	default:
…		…
359	while (type != REQ_QUIT);	708	while (type != REQ_QUIT);
360		709
361	return 0;	710	return 0;
362	}	711	}
363		712
		713	/*****************************************************************************/
		714
		715	static void atfork_prepare (void)
		716	{
		717	pthread_mutex_lock (&reqlock);
		718	pthread_mutex_lock (&reslock);
		719	#if !HAVE_PREADWRITE
		720	pthread_mutex_lock (&preadwritelock);
		721	#endif
		722	#if !HAVE_READDIR_R
		723	pthread_mutex_lock (&readdirlock);
		724	#endif
		725	}
		726
		727	static void atfork_parent (void)
		728	{
		729	#if !HAVE_READDIR_R
		730	pthread_mutex_unlock (&readdirlock);
		731	#endif
		732	#if !HAVE_PREADWRITE
		733	pthread_mutex_unlock (&preadwritelock);
		734	#endif
		735	pthread_mutex_unlock (&reslock);
		736	pthread_mutex_unlock (&reqlock);
		737	}
		738
		739	static void atfork_child (void)
		740	{
		741	aio_req prv;
		742
		743	started = 0;
		744
		745	while (reqs)
		746	{
		747	prv = reqs;
		748	reqs = prv->next;
		749	free_req (prv);
		750	}
		751
		752	reqs = reqe = 0;
		753
		754	while (ress)
		755	{
		756	prv = ress;
		757	ress = prv->next;
		758	free_req (prv);
		759	}
		760
		761	ress = rese = 0;
		762
		763	close (respipe [0]);
		764	close (respipe [1]);
		765	create_pipe ();
		766
		767	atfork_parent ();
		768	}
		769
		770	#define dREQ \
		771	aio_req req; \
		772	\
		773	if (SvOK (callback) && !SvROK (callback)) \
		774	croak ("clalback must be undef or of reference type"); \
		775	\
		776	Newz (0, req, 1, aio_cb); \
		777	if (!req) \
		778	croak ("out of memory during aio_req allocation"); \
		779	\
		780	req->callback = newSVsv (callback);
		781
364	MODULE = IO::AIO PACKAGE = IO::AIO	782	MODULE = IO::AIO PACKAGE = IO::AIO
365		783
		784	PROTOTYPES: ENABLE
		785
366	BOOT:	786	BOOT:
367	{	787	{
368	if (pipe (respipe))	788	HV *stash = gv_stashpv ("IO::AIO", 1);
369	croak ("unable to initialize result pipe");	789	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		790	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		791	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
370		792
371	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	793	create_pipe ();
372	croak ("cannot set result pipe to nonblocking mode");	794	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
373
374	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
375	croak ("cannot set result pipe to nonblocking mode");
376	}	795	}
377		796
378	void	797	void
379	min_parallel(nthreads)	798	min_parallel (nthreads)
380	int nthreads	799	int nthreads
381	PROTOTYPE: $	800	PROTOTYPE: $
382	CODE:
383	while (nthreads > started)
384	start_thread ();
385		801
386	void	802	void
387	max_parallel(nthreads)	803	max_parallel (nthreads)
388	int nthreads	804	int nthreads
389	PROTOTYPE: $	805	PROTOTYPE: $
390	CODE:
391	{
392	int cur = started;
393	while (cur > nthreads)
394	{
395	end_thread ();
396	cur--;
397	}
398
399	while (started > nthreads)
400	{
401	poll_wait ();
402	poll_cb ();
403	}
404	}
405		806
406	int	807	int
407	max_outstanding(nreqs)	808	max_outstanding (nreqs)
408	int nreqs	809	int nreqs
409	PROTOTYPE: $	810	PROTOTYPE: $
410	CODE:	811	CODE:
411	RETVAL = max_outstanding;	812	RETVAL = max_outstanding;
412	max_outstanding = nreqs;	813	max_outstanding = nreqs;
413		814
414	void	815	void
415	aio_open(pathname,flags,mode,callback)	816	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
416	SV * pathname	817	SV * pathname
417	int flags	818	int flags
418	int mode	819	int mode
419	SV * callback	820	SV * callback
420	PROTOTYPE: $$$$	821	PROTOTYPE: $$$;$
421	CODE:	822	CODE:
422	{	823	{
423	aio_req req;	824	dREQ;
424
425	Newz (0, req, 1, aio_cb);
426
427	if (!req)
428	croak ("out of memory during aio_req allocation");
429		825
430	req->type = REQ_OPEN;	826	req->type = REQ_OPEN;
431	req->data = newSVsv (pathname);	827	req->data = newSVsv (pathname);
432	req->dataptr = SvPV_nolen (req->data);	828	req->dataptr = SvPVbyte_nolen (req->data);
433	req->fd = flags;	829	req->fd = flags;
434	req->mode = mode;	830	req->mode = mode;
435	req->callback = SvREFCNT_inc (callback);
436		831
437	send_req (req);	832	send_req (req);
438	}	833	}
439		834
440	void	835	void
441	aio_close(fh,callback)	836	aio_close (fh,callback=&PL_sv_undef)
442	InputStream fh	837	SV * fh
443	SV * callback	838	SV * callback
444	PROTOTYPE: $$	839	PROTOTYPE: $;$
445	ALIAS:	840	ALIAS:
446	aio_close = REQ_CLOSE	841	aio_close = REQ_CLOSE
447	aio_fsync = REQ_FSYNC	842	aio_fsync = REQ_FSYNC
448	aio_fdatasync = REQ_FDATASYNC	843	aio_fdatasync = REQ_FDATASYNC
449	CODE:	844	CODE:
450	{	845	{
		846	dREQ;
		847
		848	req->type = ix;
		849	req->fh = newSVsv (fh);
		850	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
		851
		852	send_req (req);
		853	}
		854
		855	void
		856	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
		857	SV * fh
		858	UV offset
		859	UV length
		860	SV * data
		861	UV dataoffset
		862	SV * callback
		863	ALIAS:
		864	aio_read = REQ_READ
		865	aio_write = REQ_WRITE
		866	PROTOTYPE: $$$$$;$
		867	CODE:
		868	{
451	aio_req req;	869	aio_req req;
		870	STRLEN svlen;
		871	char *svptr = SvPVbyte (data, svlen);
452		872
453	Newz (0, req, 1, aio_cb);	873	SvUPGRADE (data, SVt_PV);
		874	SvPOK_on (data);
454		875
455	if (!req)	876	if (dataoffset < 0)
456	croak ("out of memory during aio_req allocation");	877	dataoffset += svlen;
457		878
458	req->type = ix;	879	if (dataoffset < 0 \|\| dataoffset > svlen)
459	req->fd = PerlIO_fileno (fh);	880	croak ("data offset outside of string");
460	req->callback = SvREFCNT_inc (callback);
461		881
462	send_req (req);	882	if (ix == REQ_WRITE)
463	}	883	{
464		884	/* write: check length and adjust. */
465	void	885	if (length < 0 \|\| length + dataoffset > svlen)
466	aio_read(fh,offset,length,data,dataoffset,callback)	886	length = svlen - dataoffset;
467	InputStream fh	887	}
468	UV offset	888	else
469	IV length	889	{
470	SV * data	890	/* read: grow scalar as necessary */
471	IV dataoffset	891	svptr = SvGROW (data, length + dataoffset);
472	SV * callback	892	}
473	PROTOTYPE: $$$$$$
474	CODE:
475	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
476
477	void
478	aio_write(fh,offset,length,data,dataoffset,callback)
479	OutputStream fh
480	UV offset
481	IV length
482	SV * data
483	IV dataoffset
484	SV * callback
485	PROTOTYPE: $$$$$$
486	CODE:
487	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
488
489	void
490	aio_readahead(fh,offset,length,callback)
491	InputStream fh
492	UV offset
493	IV length
494	SV * callback
495	PROTOTYPE: $$$$
496	CODE:
497	{
498	aio_req req;
499		893
500	if (length < 0)	894	if (length < 0)
501	croak ("length must not be negative");	895	croak ("length must not be negative");
502		896
503	Newz (0, req, 1, aio_cb);	897	{
		898	dREQ;
504		899
505	if (!req)	900	req->type = ix;
506	croak ("out of memory during aio_req allocation");	901	req->fh = newSVsv (fh);
		902	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
		903	: IoOFP (sv_2io (fh)));
		904	req->offset = offset;
		905	req->length = length;
		906	req->data = SvREFCNT_inc (data);
		907	req->dataptr = (char *)svptr + dataoffset;
		908
		909	if (!SvREADONLY (data))
		910	{
		911	SvREADONLY_on (data);
		912	req->data2ptr = (void *)data;
		913	}
		914
		915	send_req (req);
		916	}
		917	}
		918
		919	void
		920	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		921	SV * out_fh
		922	SV * in_fh
		923	UV in_offset
		924	UV length
		925	SV * callback
		926	PROTOTYPE: $$$$;$
		927	CODE:
		928	{
		929	dREQ;
		930
		931	req->type = REQ_SENDFILE;
		932	req->fh = newSVsv (out_fh);
		933	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		934	req->fh2 = newSVsv (in_fh);
		935	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		936	req->offset = in_offset;
		937	req->length = length;
		938
		939	send_req (req);
		940	}
		941
		942	void
		943	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
		944	SV * fh
		945	UV offset
		946	IV length
		947	SV * callback
		948	PROTOTYPE: $$$;$
		949	CODE:
		950	{
		951	dREQ;
507		952
508	req->type = REQ_READAHEAD;	953	req->type = REQ_READAHEAD;
		954	req->fh = newSVsv (fh);
509	req->fd = PerlIO_fileno (fh);	955	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
510	req->offset = offset;	956	req->offset = offset;
511	req->length = length;	957	req->length = length;
512	req->callback = SvREFCNT_inc (callback);
513		958
514	send_req (req);	959	send_req (req);
515	}	960	}
516		961
517	void	962	void
518	aio_stat(fh_or_path,callback)	963	aio_stat (fh_or_path,callback=&PL_sv_undef)
519	SV * fh_or_path	964	SV * fh_or_path
520	SV * callback	965	SV * callback
521	PROTOTYPE: $$
522	ALIAS:	966	ALIAS:
		967	aio_stat = REQ_STAT
523	aio_lstat = 1	968	aio_lstat = REQ_LSTAT
524	CODE:	969	CODE:
525	{	970	{
526	aio_req req;	971	dREQ;
527
528	Newz (0, req, 1, aio_cb);
529
530	if (!req)
531	croak ("out of memory during aio_req allocation");
532		972
533	New (0, req->statdata, 1, Stat_t);	973	New (0, req->statdata, 1, Stat_t);
534
535	if (!req->statdata)	974	if (!req->statdata)
		975	{
		976	free_req (req);
536	croak ("out of memory during aio_req->statdata allocation");	977	croak ("out of memory during aio_req->statdata allocation");
		978	}
537		979
538	if (SvPOK (fh_or_path))	980	if (SvPOK (fh_or_path))
539	{	981	{
540	req->type = ix ? REQ_LSTAT : REQ_STAT;	982	req->type = ix;
541	req->data = newSVsv (fh_or_path);	983	req->data = newSVsv (fh_or_path);
542	req->dataptr = SvPV_nolen (req->data);	984	req->dataptr = SvPVbyte_nolen (req->data);
543	}	985	}
544	else	986	else
545	{	987	{
546	req->type = REQ_FSTAT;	988	req->type = REQ_FSTAT;
		989	req->fh = newSVsv (fh_or_path);
547	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	990	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
548	}	991	}
549		992
550	req->callback = SvREFCNT_inc (callback);
551
552	send_req (req);	993	send_req (req);
553	}	994	}
554		995
555	void	996	void
556	aio_unlink(pathname,callback)	997	aio_unlink (pathname,callback=&PL_sv_undef)
557	SV * pathname	998	SV * pathname
558	SV * callback	999	SV * callback
559	PROTOTYPE: $$	1000	ALIAS:
		1001	aio_unlink = REQ_UNLINK
		1002	aio_rmdir = REQ_RMDIR
		1003	aio_readdir = REQ_READDIR
560	CODE:	1004	CODE:
561	{	1005	{
562	aio_req req;	1006	dREQ;
563		1007
564	Newz (0, req, 1, aio_cb);	1008	req->type = ix;
565
566	if (!req)
567	croak ("out of memory during aio_req allocation");
568
569	req->type = REQ_UNLINK;
570	req->data = newSVsv (pathname);	1009	req->data = newSVsv (pathname);
571	req->dataptr = SvPV_nolen (req->data);	1010	req->dataptr = SvPVbyte_nolen (req->data);
572	req->callback = SvREFCNT_inc (callback);
573		1011
574	send_req (req);	1012	send_req (req);
575	}	1013	}
		1014
		1015	void
		1016	aio_link (oldpath,newpath,callback=&PL_sv_undef)
		1017	SV * oldpath
		1018	SV * newpath
		1019	SV * callback
		1020	ALIAS:
		1021	aio_link = REQ_LINK
		1022	aio_symlink = REQ_SYMLINK
		1023	aio_rename = REQ_RENAME
		1024	CODE:
		1025	{
		1026	dREQ;
		1027
		1028	req->type = ix;
		1029	req->fh = newSVsv (oldpath);
		1030	req->data2ptr = SvPVbyte_nolen (req->fh);
		1031	req->data = newSVsv (newpath);
		1032	req->dataptr = SvPVbyte_nolen (req->data);
		1033
		1034	send_req (req);
		1035	}
		1036
		1037	#if 0
		1038
		1039	# undocumented, because it does not cancel active requests
		1040	void
		1041	cancel_most_requests ()
		1042	PROTOTYPE:
		1043	CODE:
		1044	{
		1045	aio_req *req;
		1046
		1047	pthread_mutex_lock (&reqlock);
		1048	for (req = reqs; req; req = req->next)
		1049	req->flags \|= 1;
		1050	pthread_mutex_unlock (&reqlock);
		1051
		1052	pthread_mutex_lock (&reslock);
		1053	for (req = ress; req; req = req->next)
		1054	req->flags \|= 1;
		1055	pthread_mutex_unlock (&reslock);
		1056	}
		1057
		1058	#endif
		1059
		1060	void
		1061	flush ()
		1062	PROTOTYPE:
		1063	CODE:
		1064	while (nreqs)
		1065	{
		1066	poll_wait ();
		1067	poll_cb ();
		1068	}
		1069
		1070	void
		1071	poll()
		1072	PROTOTYPE:
		1073	CODE:
		1074	if (nreqs)
		1075	{
		1076	poll_wait ();
		1077	poll_cb ();
		1078	}
576		1079
577	int	1080	int
578	poll_fileno()	1081	poll_fileno()
579	PROTOTYPE:	1082	PROTOTYPE:
580	CODE:	1083	CODE:

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.5 by root, Sun Jul 10 23:45:16 2005 UTC vs. Revision 1.42 by root, Fri Jul 21 07:35:31 2006 UTC

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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.5 by root, Sun Jul 10 23:45:16 2005 UTC vs.
Revision 1.42 by root, Fri Jul 21 07:35:31 2006 UTC