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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.6 by root, Mon Jul 11 01:03:17 2005 UTC vs.
Revision 1.38 by root, Sun Aug 28 10:51:33 2005 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>
5	#include <sys/types.h>	13	#include <sys/types.h>
6	#include <sys/stat.h>	14	#include <sys/stat.h>
		15	#include <limits.h>
7	#include <unistd.h>	16	#include <unistd.h>
8	#include <fcntl.h>	17	#include <fcntl.h>
9	#include <signal.h>	18	#include <signal.h>
10	#include <sched.h>	19	#include <sched.h>
11	#include <endian.h>
12		20
13	#include <pthread.h>	21	#if HAVE_SENDFILE
		22	# if __linux
		23	# include <sys/sendfile.h>
		24	# elif __freebsd
14	#include <sys/syscall.h>	25	# include <sys/socket.h>
15		26	# include <sys/uio.h>
16	typedef void InputStream; / hack, but 5.6.1 is simply toooo old ;) */	27	# elif __hpux
17	typedef void OutputStream; / hack, but 5.6.1 is simply toooo old ;) */	28	# include <sys/socket.h>
18	typedef void InOutStream; / hack, but 5.6.1 is simply toooo old ;) */	29	# elif __solaris /* not yet */
		30	# include <sys/sendfile.h>
		31	# else
		32	# error sendfile support requested but not available
		33	# endif
		34	#endif
19		35
20	#if __ia64	36	#if __ia64
21	# define STACKSIZE 65536	37	# define STACKSIZE 65536
22	#else	38	#else
23	# define STACKSIZE 4096	39	# define STACKSIZE 8192
24	#endif	40	#endif
25		41
26	enum {	42	enum {
27	REQ_QUIT,	43	REQ_QUIT,
28	REQ_OPEN, REQ_CLOSE,	44	REQ_OPEN, REQ_CLOSE,
29	REQ_READ, REQ_WRITE, REQ_READAHEAD,	45	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		46	REQ_SENDFILE,
30	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,	47	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
31	REQ_FSYNC, REQ_FDATASYNC,	48	REQ_FSYNC, REQ_FDATASYNC,
		49	REQ_UNLINK, REQ_RMDIR,
		50	REQ_READDIR,
		51	REQ_SYMLINK,
32	};	52	};
33		53
34	typedef struct aio_cb {	54	typedef struct aio_cb {
35	struct aio_cb *volatile next;	55	struct aio_cb *volatile next;
36		56
37	int type;	57	int type;
38		58
		59	/* should receive a cleanup, with unions */
39	int fd;	60	int fd, fd2;
40	off_t offset;	61	off_t offset;
41	size_t length;	62	size_t length;
42	ssize_t result;	63	ssize_t result;
43	mode_t mode; /* open */	64	mode_t mode; /* open */
44	int errorno;	65	int errorno;
45	SV data, callback;	66	SV data, callback;
46	void *dataptr;	67	SV fh, fh2;
		68	void dataptr, data2ptr;
47	STRLEN dataoffset;	69	STRLEN dataoffset;
48		70
49	Stat_t *statdata;	71	Stat_t *statdata;
50	} aio_cb;	72	} aio_cb;
51		73
52	typedef aio_cb *aio_req;	74	typedef aio_cb *aio_req;
53		75
54	static int started;	76	static int started, wanted;
55	static int nreqs;	77	static volatile int nreqs;
56	static int max_outstanding = 1<<30;	78	static int max_outstanding = 1<<30;
57	static int respipe [2];	79	static int respipe [2];
58		80
59	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	81	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
60	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	82	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
61	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	83	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
62		84
63	static volatile aio_req reqs, reqe; /* queue start, queue end */	85	static volatile aio_req reqs, reqe; /* queue start, queue end */
64	static volatile aio_req ress, rese; /* queue start, queue end */	86	static volatile aio_req ress, rese; /* queue start, queue end */
65		87
		88	static void free_req (aio_req req)
		89	{
		90	if (req->data)
		91	SvREFCNT_dec (req->data);
		92
		93	if (req->fh)
		94	SvREFCNT_dec (req->fh);
		95
		96	if (req->fh2)
		97	SvREFCNT_dec (req->fh2);
		98
		99	if (req->statdata)
		100	Safefree (req->statdata);
		101
		102	if (req->callback)
		103	SvREFCNT_dec (req->callback);
		104
		105	if (req->type == REQ_READDIR && req->result >= 0)
		106	free (req->data2ptr);
		107
		108	Safefree (req);
		109	}
		110
66	static void	111	static void
67	poll_wait ()	112	poll_wait ()
68	{	113	{
69	if (!nreqs)	114	if (nreqs && !ress)
70	return;	115	{
71
72	fd_set rfd;	116	fd_set rfd;
73	FD_ZERO(&rfd);	117	FD_ZERO(&rfd);
74	FD_SET(respipe [0], &rfd);	118	FD_SET(respipe [0], &rfd);
75		119
76	select (respipe [0] + 1, &rfd, 0, 0, 0);	120	select (respipe [0] + 1, &rfd, 0, 0, 0);
		121	}
77	}	122	}
78		123
79	static int	124	static int
80	poll_cb ()	125	poll_cb ()
81	{	126	{
82	dSP;	127	dSP;
83	int count = 0;	128	int count = 0;
		129	int do_croak = 0;
84	aio_req req;	130	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		131
93	for (;;)	132	for (;;)
94	{	133	{
95	pthread_mutex_lock (&reslock);	134	pthread_mutex_lock (&reslock);
96
97	req = ress;	135	req = ress;
98		136
99	if (ress)	137	if (req)
100	{	138	{
101	ress = ress->next;	139	ress = req->next;
		140
102	if (!ress) rese = 0;	141	if (!ress)
		142	{
		143	/* read any signals sent by the worker threads */
		144	char buf [32];
		145	while (read (respipe [0], buf, 32) == 32)
		146	;
		147
		148	rese = 0;
		149	}
103	}	150	}
104		151
105	pthread_mutex_unlock (&reslock);	152	pthread_mutex_unlock (&reslock);
106		153
107	if (!req)	154	if (!req)
115	{	162	{
116	int errorno = errno;	163	int errorno = errno;
117	errno = req->errorno;	164	errno = req->errorno;
118		165
119	if (req->type == REQ_READ)	166	if (req->type == REQ_READ)
120	SvCUR_set (req->data, req->dataoffset	167	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
121	+ req->result > 0 ? req->result : 0);
122		168
		169	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
		170	SvREADONLY_off (req->data);
		171
123	if (req->data)	172	if (req->statdata)
124	SvREFCNT_dec (req->data);
125
126	if (req->type == REQ_STAT \|\| req->type == REQ_LSTAT \|\| req->type == REQ_FSTAT)
127	{	173	{
128	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	174	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
129	PL_laststatval = req->result;	175	PL_laststatval = req->result;
130	PL_statcache = *(req->statdata);	176	PL_statcache = *(req->statdata);
131
132	Safefree (req->statdata);
133	}	177	}
134		178
		179	ENTER;
135	PUSHMARK (SP);	180	PUSHMARK (SP);
136	XPUSHs (sv_2mortal (newSViv (req->result)));
137		181
138	if (req->type == REQ_OPEN)	182	if (req->type == REQ_READDIR)
139	{	183	{
		184	SV *rv = &PL_sv_undef;
		185
		186	if (req->result >= 0)
		187	{
		188	char *buf = req->data2ptr;
		189	AV *av = newAV ();
		190
		191	while (req->result)
		192	{
		193	SV *sv = newSVpv (buf, 0);
		194
		195	av_push (av, sv);
		196	buf += SvCUR (sv) + 1;
		197	req->result--;
		198	}
		199
		200	rv = sv_2mortal (newRV_noinc ((SV *)av));
		201	}
		202
		203	XPUSHs (rv);
		204	}
		205	else
		206	{
		207	XPUSHs (sv_2mortal (newSViv (req->result)));
		208
		209	if (req->type == REQ_OPEN)
		210	{
140	/* convert fd to fh */	211	/* convert fd to fh */
141	SV *fh;	212	SV *fh;
142		213
		214	PUTBACK;
		215	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		216	SPAGAIN;
		217
		218	fh = SvREFCNT_inc (POPs);
		219
		220	PUSHMARK (SP);
		221	XPUSHs (sv_2mortal (fh));
		222	}
		223	}
		224
		225	if (SvOK (req->callback))
		226	{
143	PUTBACK;	227	PUTBACK;
144	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);	228	call_sv (req->callback, G_VOID \| G_EVAL);
145	SPAGAIN;	229	SPAGAIN;
146		230
147	fh = POPs;	231	if (SvTRUE (ERRSV))
148		232	{
149	PUSHMARK (SP);	233	free_req (req);
150	XPUSHs (fh);	234	croak (0);
		235	}
151	}	236	}
152		237
153	PUTBACK;
154	call_sv (req->callback, G_VOID \| G_EVAL);
155	SPAGAIN;
156		238	LEAVE;
157	if (req->callback)
158	SvREFCNT_dec (req->callback);
159		239
160	errno = errorno;	240	errno = errorno;
161	count++;	241	count++;
162	}	242	}
163		243
164	Safefree (req);	244	free_req (req);
165	}	245	}
166		246
167	return count;	247	return count;
168	}	248	}
169		249
…		…
190	}	270	}
191		271
192	static void	272	static void
193	send_req (aio_req req)	273	send_req (aio_req req)
194	{	274	{
		275	while (started < wanted && nreqs >= started)
		276	start_thread ();
		277
195	nreqs++;	278	nreqs++;
196		279
197	pthread_mutex_lock (&reqlock);	280	pthread_mutex_lock (&reqlock);
198		281
199	req->next = 0;	282	req->next = 0;
…		…
207	reqe = reqs = req;	290	reqe = reqs = req;
208		291
209	pthread_cond_signal (&reqwait);	292	pthread_cond_signal (&reqwait);
210	pthread_mutex_unlock (&reqlock);	293	pthread_mutex_unlock (&reqlock);
211		294
212	while (nreqs > max_outstanding)	295	if (nreqs > max_outstanding)
		296	for (;;)
		297	{
		298	poll_cb ();
		299
		300	if (nreqs <= max_outstanding)
		301	break;
		302
		303	poll_wait ();
		304	}
		305	}
		306
		307	static void
		308	end_thread (void)
		309	{
		310	aio_req req;
		311	Newz (0, req, 1, aio_cb);
		312	req->type = REQ_QUIT;
		313
		314	send_req (req);
		315	}
		316
		317	static void min_parallel (int nthreads)
		318	{
		319	if (wanted < nthreads)
		320	wanted = nthreads;
		321	}
		322
		323	static void max_parallel (int nthreads)
		324	{
		325	int cur = started;
		326
		327	if (wanted > nthreads)
		328	wanted = nthreads;
		329
		330	while (cur > wanted)
		331	{
		332	end_thread ();
		333	cur--;
		334	}
		335
		336	while (started > wanted)
213	{	337	{
214	poll_wait ();	338	poll_wait ();
215	poll_cb ();	339	poll_cb ();
216	}	340	}
217	}	341	}
218		342
219	static void	343	static void create_pipe ()
220	end_thread (void)
221	{	344	{
222	aio_req req;	345	if (pipe (respipe))
223	New (0, req, 1, aio_cb);	346	croak ("unable to initialize result pipe");
224	req->type = REQ_QUIT;
225		347
226	send_req (req);	348	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
227	}	349	croak ("cannot set result pipe to nonblocking mode");
228		350
229	static void	351	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
230	read_write (int dowrite, int fd, off_t offset, size_t length,	352	croak ("cannot set result pipe to nonblocking mode");
231	SV data, STRLEN dataoffset, SV callback)	353	}
232	{
233	aio_req req;
234	STRLEN svlen;
235	char *svptr = SvPV (data, svlen);
236		354
237	SvUPGRADE (data, SVt_PV);	355	/*****************************************************************************/
238	SvPOK_on (data);	356	/* work around various missing functions */
239		357
240	if (dataoffset < 0)	358	#if !HAVE_PREADWRITE
		359	# define pread aio_pread
		360	# define pwrite aio_pwrite
		361
		362	/*
		363	* make our pread/pwrite safe against themselves, but not against
		364	* normal read/write by using a mutex. slows down execution a lot,
		365	* but that's your problem, not mine.
		366	*/
		367	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
		368
		369	static ssize_t
		370	pread (int fd, void *buf, size_t count, off_t offset)
		371	{
		372	ssize_t res;
		373	off_t ooffset;
		374
		375	pthread_mutex_lock (&preadwritelock);
		376	ooffset = lseek (fd, 0, SEEK_CUR);
		377	lseek (fd, offset, SEEK_SET);
		378	res = read (fd, buf, count);
		379	lseek (fd, ooffset, SEEK_SET);
		380	pthread_mutex_unlock (&preadwritelock);
		381
		382	return res;
		383	}
		384
		385	static ssize_t
		386	pwrite (int fd, void *buf, size_t count, off_t offset)
		387	{
		388	ssize_t res;
		389	off_t ooffset;
		390
		391	pthread_mutex_lock (&preadwritelock);
		392	ooffset = lseek (fd, 0, SEEK_CUR);
		393	lseek (fd, offset, SEEK_SET);
		394	res = write (fd, buf, count);
		395	lseek (fd, offset, SEEK_SET);
		396	pthread_mutex_unlock (&preadwritelock);
		397
		398	return res;
		399	}
		400	#endif
		401
		402	#if !HAVE_FDATASYNC
		403	# define fdatasync fsync
		404	#endif
		405
		406	#if !HAVE_READAHEAD
		407	# define readahead aio_readahead
		408
		409	static ssize_t
		410	readahead (int fd, off_t offset, size_t count)
		411	{
		412	char readahead_buf[4096];
		413
		414	while (count > 0)
		415	{
		416	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
		417
		418	pread (fd, readahead_buf, len, offset);
241	dataoffset += svlen;	419	offset += len;
242		420	count -= len;
243	if (dataoffset < 0 \|\| dataoffset > svlen)
244	croak ("data offset outside of string");
245
246	if (dowrite)
247	{	421	}
248	/* write: check length and adjust. */	422
249	if (length < 0 \|\| length + dataoffset > svlen)	423	errno = 0;
250	length = svlen - dataoffset;	424	}
		425	#endif
		426
		427	#if !HAVE_READDIR_R
		428	# define readdir_r aio_readdir_r
		429
		430	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		431
		432	static int
		433	readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
		434	{
		435	struct dirent *e;
		436	int errorno;
		437
		438	pthread_mutex_lock (&readdirlock);
		439
		440	e = readdir (dirp);
		441	errorno = errno;
		442
		443	if (e)
		444	{
		445	*res = ent;
		446	strcpy (ent->d_name, e->d_name);
251	}	447	}
252	else	448	else
		449	*res = 0;
		450
		451	pthread_mutex_unlock (&readdirlock);
		452
		453	errno = errorno;
		454	return e ? 0 : -1;
		455	}
		456	#endif
		457
		458	/* sendfile always needs emulation */
		459	static ssize_t
		460	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
		461	{
		462	ssize_t res;
		463
		464	if (!count)
		465	return 0;
		466
		467	#if HAVE_SENDFILE
		468	# if __linux
		469	res = sendfile (ofd, ifd, &offset, count);
		470
		471	# elif __freebsd
		472	/*
		473	* Of course, the freebsd sendfile is a dire hack with no thoughts
		474	* wasted on making it similar to other I/O functions.
		475	*/
253	{	476	{
254	/* read: grow scalar as necessary */	477	off_t sbytes;
255	svptr = SvGROW (data, length + dataoffset);	478	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		479
		480	if (res < 0 && sbytes)
		481	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
		482	res = sbytes;
		483	}
		484
		485	# elif __hpux
		486	res = sendfile (ofd, ifd, offset, count, 0, 0);
		487
		488	# elif __solaris
		489	{
		490	struct sendfilevec vec;
		491	size_t sbytes;
		492
		493	vec.sfv_fd = ifd;
		494	vec.sfv_flag = 0;
		495	vec.sfv_off = offset;
		496	vec.sfv_len = count;
		497
		498	res = sendfilev (ofd, &vec, 1, &sbytes);
		499
		500	if (res < 0 && sbytes)
		501	res = sbytes;
		502	}
		503
		504	# endif
		505	#else
		506	res = -1;
		507	errno = ENOSYS;
		508	#endif
		509
		510	if (res < 0
		511	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK
		512	#if __solaris
		513	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE
		514	#endif
		515	)
		516	)
256	}	517	{
		518	/* emulate sendfile. this is a major pain in the ass */
		519	char buf[4096];
		520	res = 0;
257		521
258	if (length < 0)	522	while (count)
259	croak ("length must not be negative");	523	{
		524	ssize_t cnt;
		525
		526	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
260		527
261	Newz (0, req, 1, aio_cb);	528	if (cnt <= 0)
		529	{
		530	if (cnt && !res) res = -1;
		531	break;
		532	}
262		533
		534	cnt = write (ofd, buf, cnt);
		535
		536	if (cnt <= 0)
		537	{
		538	if (cnt && !res) res = -1;
		539	break;
		540	}
		541
		542	offset += cnt;
		543	res += cnt;
		544	count -= cnt;
		545	}
		546	}
		547
		548	return res;
		549	}
		550
		551	/* read a full directory */
		552	static int
		553	scandir_ (const char path, void *namesp)
		554	{
		555	DIR *dirp = opendir (path);
		556	union
		557	{
		558	struct dirent d;
		559	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		560	} u;
		561	struct dirent *entp;
		562	char name, names;
		563	int memlen = 4096;
		564	int memofs = 0;
		565	int res = 0;
		566	int errorno;
		567
263	if (!req)	568	if (!dirp)
264	croak ("out of memory during aio_req allocation");	569	return -1;
265		570
266	req->type = dowrite ? REQ_WRITE : REQ_READ;	571	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		572
274	send_req (req);	573	for (;;)
		574	{
		575	errno = 0, readdir_r (dirp, &u.d, &entp);
		576
		577	if (!entp)
		578	break;
		579
		580	name = entp->d_name;
		581
		582	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
		583	{
		584	int len = strlen (name) + 1;
		585
		586	res++;
		587
		588	while (memofs + len > memlen)
		589	{
		590	memlen *= 2;
		591	names = realloc (names, memlen);
		592	if (!names)
		593	break;
		594	}
		595
		596	memcpy (names + memofs, name, len);
		597	memofs += len;
		598	}
		599	}
		600
		601	errorno = errno;
		602	closedir (dirp);
		603
		604	if (errorno)
		605	{
		606	free (names);
		607	errno = errorno;
		608	res = -1;
		609	}
		610
		611	namesp = (void )names;
		612	return res;
275	}	613	}
		614
		615	/*****************************************************************************/
276		616
277	static void *	617	static void *
278	aio_proc (void *thr_arg)	618	aio_proc (void *thr_arg)
279	{	619	{
280	aio_req req;	620	aio_req req;
…		…
306		646
307	type = req->type;	647	type = req->type;
308		648
309	switch (type)	649	switch (type)
310	{	650	{
311	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;	651	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;	652	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
313	#if SYS_readahead	653
314	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	654	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
315	#else	655	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		656
319	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	657	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
320	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	658	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
321	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	659	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
322		660
323	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	661	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
324	case REQ_CLOSE: req->result = close (req->fd); break;	662	case REQ_CLOSE: req->result = close (req->fd); break;
325	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	663	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
		664	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		665	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
326		666
		667	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
327	case REQ_FSYNC: req->result = fsync (req->fd); break;	668	case REQ_FSYNC: req->result = fsync (req->fd); break;
328	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	669	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
329		670
330	case REQ_QUIT:	671	case REQ_QUIT:
331	break;	672	break;
332		673
333	default:	674	default:
…		…
359	while (type != REQ_QUIT);	700	while (type != REQ_QUIT);
360		701
361	return 0;	702	return 0;
362	}	703	}
363		704
		705	/*****************************************************************************/
		706
		707	static void atfork_prepare (void)
		708	{
		709	pthread_mutex_lock (&reqlock);
		710	pthread_mutex_lock (&reslock);
		711	#if !HAVE_PREADWRITE
		712	pthread_mutex_lock (&preadwritelock);
		713	#endif
		714	#if !HAVE_READDIR_R
		715	pthread_mutex_lock (&readdirlock);
		716	#endif
		717	}
		718
		719	static void atfork_parent (void)
		720	{
		721	#if !HAVE_READDIR_R
		722	pthread_mutex_unlock (&readdirlock);
		723	#endif
		724	#if !HAVE_PREADWRITE
		725	pthread_mutex_unlock (&preadwritelock);
		726	#endif
		727	pthread_mutex_unlock (&reslock);
		728	pthread_mutex_unlock (&reqlock);
		729	}
		730
		731	static void atfork_child (void)
		732	{
		733	aio_req prv;
		734
		735	started = 0;
		736
		737	while (reqs)
		738	{
		739	prv = reqs;
		740	reqs = prv->next;
		741	free_req (prv);
		742	}
		743
		744	reqs = reqe = 0;
		745
		746	while (ress)
		747	{
		748	prv = ress;
		749	ress = prv->next;
		750	free_req (prv);
		751	}
		752
		753	ress = rese = 0;
		754
		755	close (respipe [0]);
		756	close (respipe [1]);
		757	create_pipe ();
		758
		759	atfork_parent ();
		760	}
		761
		762	#define dREQ \
		763	aio_req req; \
		764	\
		765	if (SvOK (callback) && !SvROK (callback)) \
		766	croak ("clalback must be undef or of reference type"); \
		767	\
		768	Newz (0, req, 1, aio_cb); \
		769	if (!req) \
		770	croak ("out of memory during aio_req allocation"); \
		771	\
		772	req->callback = newSVsv (callback);
		773
364	MODULE = IO::AIO PACKAGE = IO::AIO	774	MODULE = IO::AIO PACKAGE = IO::AIO
365		775
		776	PROTOTYPES: ENABLE
		777
366	BOOT:	778	BOOT:
367	{	779	{
368	if (pipe (respipe))	780	create_pipe ();
369	croak ("unable to initialize result pipe");	781	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
370
371	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
372	croak ("cannot set result pipe to nonblocking mode");
373
374	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
375	croak ("cannot set result pipe to nonblocking mode");
376	}	782	}
377		783
378	void	784	void
379	min_parallel(nthreads)	785	min_parallel(nthreads)
380	int nthreads	786	int nthreads
381	PROTOTYPE: $	787	PROTOTYPE: $
382	CODE:
383	while (nthreads > started)
384	start_thread ();
385		788
386	void	789	void
387	max_parallel(nthreads)	790	max_parallel(nthreads)
388	int nthreads	791	int nthreads
389	PROTOTYPE: $	792	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		793
406	int	794	int
407	max_outstanding(nreqs)	795	max_outstanding(nreqs)
408	int nreqs	796	int nreqs
409	PROTOTYPE: $	797	PROTOTYPE: $
410	CODE:	798	CODE:
411	RETVAL = max_outstanding;	799	RETVAL = max_outstanding;
412	max_outstanding = nreqs;	800	max_outstanding = nreqs;
413		801
414	void	802	void
415	aio_open(pathname,flags,mode,callback)	803	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
416	SV * pathname	804	SV * pathname
417	int flags	805	int flags
418	int mode	806	int mode
419	SV * callback	807	SV * callback
420	PROTOTYPE: $$$$	808	PROTOTYPE: $$$;$
421	CODE:	809	CODE:
422	{	810	{
423	aio_req req;	811	dREQ;
424
425	Newz (0, req, 1, aio_cb);
426
427	if (!req)
428	croak ("out of memory during aio_req allocation");
429		812
430	req->type = REQ_OPEN;	813	req->type = REQ_OPEN;
431	req->data = newSVsv (pathname);	814	req->data = newSVsv (pathname);
432	req->dataptr = SvPV_nolen (req->data);	815	req->dataptr = SvPVbyte_nolen (req->data);
433	req->fd = flags;	816	req->fd = flags;
434	req->mode = mode;	817	req->mode = mode;
435	req->callback = SvREFCNT_inc (callback);
436		818
437	send_req (req);	819	send_req (req);
438	}	820	}
439		821
440	void	822	void
441	aio_close(fh,callback)	823	aio_close(fh,callback=&PL_sv_undef)
442	InputStream fh	824	SV * fh
443	SV * callback	825	SV * callback
444	PROTOTYPE: $$	826	PROTOTYPE: $;$
445	ALIAS:	827	ALIAS:
446	aio_close = REQ_CLOSE	828	aio_close = REQ_CLOSE
447	aio_fsync = REQ_FSYNC	829	aio_fsync = REQ_FSYNC
448	aio_fdatasync = REQ_FDATASYNC	830	aio_fdatasync = REQ_FDATASYNC
449	CODE:	831	CODE:
450	{	832	{
		833	dREQ;
		834
		835	req->type = ix;
		836	req->fh = newSVsv (fh);
		837	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
		838
		839	send_req (req);
		840	}
		841
		842	void
		843	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
		844	SV * fh
		845	UV offset
		846	UV length
		847	SV * data
		848	UV dataoffset
		849	SV * callback
		850	ALIAS:
		851	aio_read = REQ_READ
		852	aio_write = REQ_WRITE
		853	PROTOTYPE: $$$$$;$
		854	CODE:
		855	{
451	aio_req req;	856	aio_req req;
		857	STRLEN svlen;
		858	char *svptr = SvPVbyte (data, svlen);
452		859
453	Newz (0, req, 1, aio_cb);	860	SvUPGRADE (data, SVt_PV);
		861	SvPOK_on (data);
454		862
455	if (!req)	863	if (dataoffset < 0)
456	croak ("out of memory during aio_req allocation");	864	dataoffset += svlen;
457		865
458	req->type = ix;	866	if (dataoffset < 0 \|\| dataoffset > svlen)
459	req->fd = PerlIO_fileno (fh);	867	croak ("data offset outside of string");
460	req->callback = SvREFCNT_inc (callback);
461		868
462	send_req (req);	869	if (ix == REQ_WRITE)
463	}	870	{
464		871	/* write: check length and adjust. */
465	void	872	if (length < 0 \|\| length + dataoffset > svlen)
466	aio_read(fh,offset,length,data,dataoffset,callback)	873	length = svlen - dataoffset;
467	InputStream fh	874	}
468	UV offset	875	else
469	IV length	876	{
470	SV * data	877	/* read: grow scalar as necessary */
471	IV dataoffset	878	svptr = SvGROW (data, length + dataoffset);
472	SV * callback	879	}
473	PROTOTYPE: $$$$$$
474	CODE:
475	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
476
477	void
478	aio_write(fh,offset,length,data,dataoffset,callback)
479	OutputStream fh
480	UV offset
481	IV length
482	SV * data
483	IV dataoffset
484	SV * callback
485	PROTOTYPE: $$$$$$
486	CODE:
487	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
488
489	void
490	aio_readahead(fh,offset,length,callback)
491	InputStream fh
492	UV offset
493	IV length
494	SV * callback
495	PROTOTYPE: $$$$
496	CODE:
497	{
498	aio_req req;
499		880
500	if (length < 0)	881	if (length < 0)
501	croak ("length must not be negative");	882	croak ("length must not be negative");
502		883
503	Newz (0, req, 1, aio_cb);	884	{
		885	dREQ;
504		886
505	if (!req)	887	req->type = ix;
506	croak ("out of memory during aio_req allocation");	888	req->fh = newSVsv (fh);
		889	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
		890	: IoOFP (sv_2io (fh)));
		891	req->offset = offset;
		892	req->length = length;
		893	req->data = SvREFCNT_inc (data);
		894	req->dataptr = (char *)svptr + dataoffset;
		895
		896	if (!SvREADONLY (data))
		897	{
		898	SvREADONLY_on (data);
		899	req->data2ptr = (void *)data;
		900	}
		901
		902	send_req (req);
		903	}
		904	}
		905
		906	void
		907	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		908	SV * out_fh
		909	SV * in_fh
		910	UV in_offset
		911	UV length
		912	SV * callback
		913	PROTOTYPE: $$$$;$
		914	CODE:
		915	{
		916	dREQ;
		917
		918	req->type = REQ_SENDFILE;
		919	req->fh = newSVsv (out_fh);
		920	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		921	req->fh2 = newSVsv (in_fh);
		922	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		923	req->offset = in_offset;
		924	req->length = length;
		925
		926	send_req (req);
		927	}
		928
		929	void
		930	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
		931	SV * fh
		932	UV offset
		933	IV length
		934	SV * callback
		935	PROTOTYPE: $$$;$
		936	CODE:
		937	{
		938	dREQ;
507		939
508	req->type = REQ_READAHEAD;	940	req->type = REQ_READAHEAD;
		941	req->fh = newSVsv (fh);
509	req->fd = PerlIO_fileno (fh);	942	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
510	req->offset = offset;	943	req->offset = offset;
511	req->length = length;	944	req->length = length;
512	req->callback = SvREFCNT_inc (callback);
513		945
514	send_req (req);	946	send_req (req);
515	}	947	}
516		948
517	void	949	void
518	aio_stat(fh_or_path,callback)	950	aio_stat(fh_or_path,callback=&PL_sv_undef)
519	SV * fh_or_path	951	SV * fh_or_path
520	SV * callback	952	SV * callback
521	PROTOTYPE: $$
522	ALIAS:	953	ALIAS:
		954	aio_stat = REQ_STAT
523	aio_lstat = 1	955	aio_lstat = REQ_LSTAT
524	CODE:	956	CODE:
525	{	957	{
526	aio_req req;	958	dREQ;
527
528	Newz (0, req, 1, aio_cb);
529
530	if (!req)
531	croak ("out of memory during aio_req allocation");
532		959
533	New (0, req->statdata, 1, Stat_t);	960	New (0, req->statdata, 1, Stat_t);
534
535	if (!req->statdata)	961	if (!req->statdata)
		962	{
		963	free_req (req);
536	croak ("out of memory during aio_req->statdata allocation");	964	croak ("out of memory during aio_req->statdata allocation");
		965	}
537		966
538	if (SvPOK (fh_or_path))	967	if (SvPOK (fh_or_path))
539	{	968	{
540	req->type = ix ? REQ_LSTAT : REQ_STAT;	969	req->type = ix;
541	req->data = newSVsv (fh_or_path);	970	req->data = newSVsv (fh_or_path);
542	req->dataptr = SvPV_nolen (req->data);	971	req->dataptr = SvPVbyte_nolen (req->data);
543	}	972	}
544	else	973	else
545	{	974	{
546	req->type = REQ_FSTAT;	975	req->type = REQ_FSTAT;
		976	req->fh = newSVsv (fh_or_path);
547	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	977	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
548	}	978	}
549		979
550	req->callback = SvREFCNT_inc (callback);
551
552	send_req (req);	980	send_req (req);
553	}	981	}
554		982
555	void	983	void
556	aio_unlink(pathname,callback)	984	aio_unlink(pathname,callback=&PL_sv_undef)
557	SV * pathname	985	SV * pathname
558	SV * callback	986	SV * callback
559	PROTOTYPE: $$	987	ALIAS:
		988	aio_unlink = REQ_UNLINK
		989	aio_rmdir = REQ_RMDIR
560	CODE:	990	CODE:
561	{	991	{
562	aio_req req;	992	dREQ;
563		993
564	Newz (0, req, 1, aio_cb);	994	req->type = ix;
		995	req->data = newSVsv (pathname);
		996	req->dataptr = SvPVbyte_nolen (req->data);
565		997
566	if (!req)	998	send_req (req);
567	croak ("out of memory during aio_req allocation");	999	}
		1000
		1001	void
		1002	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)
		1003	SV * oldpath
		1004	SV * newpath
		1005	SV * callback
		1006	CODE:
		1007	{
		1008	dREQ;
568		1009
569	req->type = REQ_UNLINK;	1010	req->type = REQ_SYMLINK;
		1011	req->fh = newSVsv (oldpath);
		1012	req->data2ptr = SvPVbyte_nolen (req->fh);
		1013	req->data = newSVsv (newpath);
		1014	req->dataptr = SvPVbyte_nolen (req->data);
		1015
		1016	send_req (req);
		1017	}
		1018
		1019	void
		1020	aio_readdir(pathname,callback=&PL_sv_undef)
		1021	SV * pathname
		1022	SV * callback
		1023	CODE:
		1024	{
		1025	dREQ;
		1026
		1027	req->type = REQ_READDIR;
570	req->data = newSVsv (pathname);	1028	req->data = newSVsv (pathname);
571	req->dataptr = SvPV_nolen (req->data);	1029	req->dataptr = SvPVbyte_nolen (req->data);
572	req->callback = SvREFCNT_inc (callback);
573		1030
574	send_req (req);	1031	send_req (req);
575	}	1032	}
576		1033
577	void	1034	void
…		…
582	{	1039	{
583	poll_wait ();	1040	poll_wait ();
584	poll_cb ();	1041	poll_cb ();
585	}	1042	}
586		1043
		1044	void
		1045	poll()
		1046	PROTOTYPE:
		1047	CODE:
		1048	if (nreqs)
		1049	{
		1050	poll_wait ();
		1051	poll_cb ();
		1052	}
		1053
587	int	1054	int
588	poll_fileno()	1055	poll_fileno()
589	PROTOTYPE:	1056	PROTOTYPE:
590	CODE:	1057	CODE:
591	RETVAL = respipe [0];	1058	RETVAL = respipe [0];

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.6 by root, Mon Jul 11 01:03:17 2005 UTC vs. Revision 1.38 by root, Sun Aug 28 10:51:33 2005 UTC

Diff Legend

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.6 by root, Mon Jul 11 01:03:17 2005 UTC vs.
Revision 1.38 by root, Sun Aug 28 10:51:33 2005 UTC