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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.4 by root, Sun Jul 10 20:57:00 2005 UTC vs.
Revision 1.38 by root, Sun Aug 28 10:51:33 2005 UTC

…		…
1	#define PERL_NO_GET_CONTEXT	1	#define _REENTRANT 1
		2	#include <errno.h>
2		3
3	#include "EXTERN.h"	4	#include "EXTERN.h"
4	#include "perl.h"	5	#include "perl.h"
5	#include "XSUB.h"	6	#include "XSUB.h"
6		7
		8	#include "autoconf/config.h"
		9
		10	#include <pthread.h>
		11
		12	#include <stddef.h>
7	#include <sys/types.h>	13	#include <sys/types.h>
8	#include <sys/stat.h>	14	#include <sys/stat.h>
		15	#include <limits.h>
9	#include <unistd.h>	16	#include <unistd.h>
10	#include <fcntl.h>	17	#include <fcntl.h>
11	#include <signal.h>	18	#include <signal.h>
12	#include <sched.h>	19	#include <sched.h>
13	#include <endian.h>
14		20
15	#include <pthread.h>	21	#if HAVE_SENDFILE
		22	# if __linux
		23	# include <sys/sendfile.h>
		24	# elif __freebsd
16	#include <sys/syscall.h>	25	# include <sys/socket.h>
17		26	# include <sys/uio.h>
18	typedef void InputStream; / hack, but 5.6.1 is simply toooo old ;) */	27	# elif __hpux
19	typedef void OutputStream; / hack, but 5.6.1 is simply toooo old ;) */	28	# include <sys/socket.h>
20	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
21		35
22	#if __ia64	36	#if __ia64
23	# define STACKSIZE 65536	37	# define STACKSIZE 65536
24	#else	38	#else
25	# define STACKSIZE 4096	39	# define STACKSIZE 8192
26	#endif	40	#endif
27		41
28	enum {	42	enum {
29	REQ_QUIT,	43	REQ_QUIT,
30	REQ_OPEN, REQ_CLOSE,	44	REQ_OPEN, REQ_CLOSE,
31	REQ_READ, REQ_WRITE, REQ_READAHEAD,	45	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		46	REQ_SENDFILE,
32	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,	47	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
33	REQ_FSYNC, REQ_FDATASYNC,	48	REQ_FSYNC, REQ_FDATASYNC,
		49	REQ_UNLINK, REQ_RMDIR,
		50	REQ_READDIR,
		51	REQ_SYMLINK,
34	};	52	};
35		53
36	typedef struct aio_cb {	54	typedef struct aio_cb {
37	struct aio_cb *volatile next;	55	struct aio_cb *volatile next;
38		56
39	int type;	57	int type;
40		58
		59	/* should receive a cleanup, with unions */
41	int fd;	60	int fd, fd2;
42	off_t offset;	61	off_t offset;
43	size_t length;	62	size_t length;
44	ssize_t result;	63	ssize_t result;
45	mode_t mode; /* open */	64	mode_t mode; /* open */
46	int errorno;	65	int errorno;
47	SV data, callback;	66	SV data, callback;
48	void *dataptr;	67	SV fh, fh2;
		68	void dataptr, data2ptr;
49	STRLEN dataoffset;	69	STRLEN dataoffset;
50		70
51	Stat_t *statdata;	71	Stat_t *statdata;
52	} aio_cb;	72	} aio_cb;
53		73
54	typedef aio_cb *aio_req;	74	typedef aio_cb *aio_req;
55		75
56	static int started;	76	static int started, wanted;
57	static int nreqs;	77	static volatile int nreqs;
58	static int max_outstanding = 1<<30;	78	static int max_outstanding = 1<<30;
59	static int respipe [2];	79	static int respipe [2];
60		80
61	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	81	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
62	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	82	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
63	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	83	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
64		84
65	static volatile aio_req reqs, reqe; /* queue start, queue end */	85	static volatile aio_req reqs, reqe; /* queue start, queue end */
66	static volatile aio_req ress, rese; /* queue start, queue end */	86	static volatile aio_req ress, rese; /* queue start, queue end */
67		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
68	static void	111	static void
69	poll_wait ()	112	poll_wait ()
70	{	113	{
71	if (!nreqs)	114	if (nreqs && !ress)
72	return;	115	{
73
74	fd_set rfd;	116	fd_set rfd;
75	FD_ZERO(&rfd);	117	FD_ZERO(&rfd);
76	FD_SET(respipe [0], &rfd);	118	FD_SET(respipe [0], &rfd);
77		119
78	select (respipe [0] + 1, &rfd, 0, 0, 0);	120	select (respipe [0] + 1, &rfd, 0, 0, 0);
		121	}
79	}	122	}
80		123
81	static int	124	static int
82	poll_cb (pTHX)	125	poll_cb ()
83	{	126	{
84	dSP;	127	dSP;
85	int count = 0;	128	int count = 0;
		129	int do_croak = 0;
86	aio_req req;	130	aio_req req;
87
88	{
89	/* read and signals sent by the worker threads */
90	char buf [32];
91	while (read (respipe [0], buf, 32) > 0)
92	;
93	}
94		131
95	for (;;)	132	for (;;)
96	{	133	{
97	pthread_mutex_lock (&reslock);	134	pthread_mutex_lock (&reslock);
98
99	req = ress;	135	req = ress;
100		136
101	if (ress)	137	if (req)
102	{	138	{
103	ress = ress->next;	139	ress = req->next;
		140
104	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	}
105	}	150	}
106		151
107	pthread_mutex_unlock (&reslock);	152	pthread_mutex_unlock (&reslock);
108		153
109	if (!req)	154	if (!req)
117	{	162	{
118	int errorno = errno;	163	int errorno = errno;
119	errno = req->errorno;	164	errno = req->errorno;
120		165
121	if (req->type == REQ_READ)	166	if (req->type == REQ_READ)
122	SvCUR_set (req->data, req->dataoffset	167	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
123	+ req->result > 0 ? req->result : 0);
124		168
		169	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
		170	SvREADONLY_off (req->data);
		171
125	if (req->data)	172	if (req->statdata)
126	SvREFCNT_dec (req->data);
127
128	if (req->type == REQ_STAT \|\| req->type == REQ_LSTAT \|\| req->type == REQ_FSTAT)
129	{	173	{
130	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	174	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
131	PL_laststatval = req->result;	175	PL_laststatval = req->result;
132	PL_statcache = *(req->statdata);	176	PL_statcache = *(req->statdata);
133
134	Safefree (req->statdata);
135	}	177	}
136		178
		179	ENTER;
137	PUSHMARK (SP);	180	PUSHMARK (SP);
138	XPUSHs (sv_2mortal (newSViv (req->result)));
139		181
140	if (req->type == REQ_OPEN)	182	if (req->type == REQ_READDIR)
141	{	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	{
142	/* convert fd to fh */	211	/* convert fd to fh */
143	SV *fh;	212	SV *fh;
144		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	{
145	PUTBACK;	227	PUTBACK;
146	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);	228	call_sv (req->callback, G_VOID \| G_EVAL);
147	SPAGAIN;	229	SPAGAIN;
148		230
149	fh = POPs;	231	if (SvTRUE (ERRSV))
150		232	{
151	PUSHMARK (SP);	233	free_req (req);
152	XPUSHs (fh);	234	croak (0);
		235	}
153	}	236	}
154		237
155	PUTBACK;
156	call_sv (req->callback, G_VOID \| G_EVAL);
157	SPAGAIN;
158		238	LEAVE;
159	if (req->callback)
160	SvREFCNT_dec (req->callback);
161		239
162	errno = errorno;	240	errno = errorno;
163	count++;	241	count++;
164	}	242	}
165		243
166	Safefree (req);	244	free_req (req);
167	}	245	}
168		246
169	return count;	247	return count;
170	}	248	}
171		249
…		…
192	}	270	}
193		271
194	static void	272	static void
195	send_req (aio_req req)	273	send_req (aio_req req)
196	{	274	{
		275	while (started < wanted && nreqs >= started)
		276	start_thread ();
		277
197	nreqs++;	278	nreqs++;
198		279
199	pthread_mutex_lock (&reqlock);	280	pthread_mutex_lock (&reqlock);
200		281
201	req->next = 0;	282	req->next = 0;
…		…
209	reqe = reqs = req;	290	reqe = reqs = req;
210		291
211	pthread_cond_signal (&reqwait);	292	pthread_cond_signal (&reqwait);
212	pthread_mutex_unlock (&reqlock);	293	pthread_mutex_unlock (&reqlock);
213		294
214	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)
215	{	337	{
216	poll_wait ();	338	poll_wait ();
217	poll_cb ();	339	poll_cb ();
218	}	340	}
219	}	341	}
220		342
221	static void	343	static void create_pipe ()
222	end_thread (void)
223	{	344	{
224	aio_req req;	345	if (pipe (respipe))
225	New (0, req, 1, aio_cb);	346	croak ("unable to initialize result pipe");
226	req->type = REQ_QUIT;
227		347
228	send_req (req);	348	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
229	}	349	croak ("cannot set result pipe to nonblocking mode");
230		350
231	static void	351	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
232	read_write (pTHX_	352	croak ("cannot set result pipe to nonblocking mode");
233	int dowrite, int fd, off_t offset, size_t length,	353	}
234	SV data, STRLEN dataoffset, SV callback)
235	{
236	aio_req req;
237	STRLEN svlen;
238	char *svptr = SvPV (data, svlen);
239		354
240	SvUPGRADE (data, SVt_PV);	355	/*****************************************************************************/
241	SvPOK_on (data);	356	/* work around various missing functions */
242		357
243	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);
244	dataoffset += svlen;	419	offset += len;
245		420	count -= len;
246	if (dataoffset < 0 \|\| dataoffset > svlen)
247	croak ("data offset outside of string");
248
249	if (dowrite)
250	{	421	}
251	/* write: check length and adjust. */	422
252	if (length < 0 \|\| length + dataoffset > svlen)	423	errno = 0;
253	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);
254	}	447	}
255	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	*/
256	{	476	{
257	/* read: grow scalar as necessary */	477	off_t sbytes;
258	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	)
259	}	517	{
		518	/* emulate sendfile. this is a major pain in the ass */
		519	char buf[4096];
		520	res = 0;
260		521
261	if (length < 0)	522	while (count)
262	croak ("length must not be negative");	523	{
		524	ssize_t cnt;
		525
		526	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
263		527
264	Newz (0, req, 1, aio_cb);	528	if (cnt <= 0)
		529	{
		530	if (cnt && !res) res = -1;
		531	break;
		532	}
265		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
266	if (!req)	568	if (!dirp)
267	croak ("out of memory during aio_req allocation");	569	return -1;
268		570
269	req->type = dowrite ? REQ_WRITE : REQ_READ;	571	names = malloc (memlen);
270	req->fd = fd;
271	req->offset = offset;
272	req->length = length;
273	req->data = SvREFCNT_inc (data);
274	req->dataptr = (char *)svptr + dataoffset;
275	req->callback = SvREFCNT_inc (callback);
276		572
277	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;
278	}	613	}
		614
		615	/*****************************************************************************/
279		616
280	static void *	617	static void *
281	aio_proc (void *thr_arg)	618	aio_proc (void *thr_arg)
282	{	619	{
283	aio_req req;	620	aio_req req;
…		…
309		646
310	type = req->type;	647	type = req->type;
311		648
312	switch (type)	649	switch (type)
313	{	650	{
314	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;
315	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;
316	#if SYS_readahead	653
317	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;
318	#else	655	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
319	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
320	#endif
321		656
322	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	657	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
323	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	658	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
324	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	659	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
325		660
326	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;
327	case REQ_CLOSE: req->result = close (req->fd); break;	662	case REQ_CLOSE: req->result = close (req->fd); break;
328	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;
329		666
		667	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
330	case REQ_FSYNC: req->result = fsync (req->fd); break;	668	case REQ_FSYNC: req->result = fsync (req->fd); break;
331	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	669	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
332		670
333	case REQ_QUIT:	671	case REQ_QUIT:
334	break;	672	break;
335		673
336	default:	674	default:
…		…
362	while (type != REQ_QUIT);	700	while (type != REQ_QUIT);
363		701
364	return 0;	702	return 0;
365	}	703	}
366		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
367	MODULE = IO::AIO PACKAGE = IO::AIO	774	MODULE = IO::AIO PACKAGE = IO::AIO
368		775
		776	PROTOTYPES: ENABLE
		777
369	BOOT:	778	BOOT:
370	{	779	{
371	if (pipe (respipe))	780	create_pipe ();
372	croak ("unable to initialize result pipe");	781	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
373
374	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
375	croak ("cannot set result pipe to nonblocking mode");
376
377	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
378	croak ("cannot set result pipe to nonblocking mode");
379	}	782	}
380		783
381	void	784	void
382	min_parallel(nthreads)	785	min_parallel(nthreads)
383	int nthreads	786	int nthreads
384	PROTOTYPE: $	787	PROTOTYPE: $
385	CODE:
386	while (nthreads > started)
387	start_thread ();
388		788
389	void	789	void
390	max_parallel(nthreads)	790	max_parallel(nthreads)
391	int nthreads	791	int nthreads
392	PROTOTYPE: $	792	PROTOTYPE: $
393	CODE:
394	{
395	int cur = started;
396	while (cur > nthreads)
397	{
398	end_thread ();
399	cur--;
400	}
401
402	while (started > nthreads)
403	{
404	poll_wait ();
405	poll_cb (aTHX);
406	}
407	}
408		793
409	int	794	int
410	max_outstanding(nreqs)	795	max_outstanding(nreqs)
411	int nreqs	796	int nreqs
412	PROTOTYPE: $	797	PROTOTYPE: $
413	CODE:	798	CODE:
414	RETVAL = max_outstanding;	799	RETVAL = max_outstanding;
415	max_outstanding = nreqs;	800	max_outstanding = nreqs;
416		801
417	void	802	void
418	aio_open(pathname,flags,mode,callback)	803	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
419	SV * pathname	804	SV * pathname
420	int flags	805	int flags
421	int mode	806	int mode
422	SV * callback	807	SV * callback
423	PROTOTYPE: $$$$	808	PROTOTYPE: $$$;$
424	CODE:	809	CODE:
425	{	810	{
426	aio_req req;	811	dREQ;
427
428	Newz (0, req, 1, aio_cb);
429
430	if (!req)
431	croak ("out of memory during aio_req allocation");
432		812
433	req->type = REQ_OPEN;	813	req->type = REQ_OPEN;
434	req->data = newSVsv (pathname);	814	req->data = newSVsv (pathname);
435	req->dataptr = SvPV_nolen (req->data);	815	req->dataptr = SvPVbyte_nolen (req->data);
436	req->fd = flags;	816	req->fd = flags;
437	req->mode = mode;	817	req->mode = mode;
438	req->callback = SvREFCNT_inc (callback);
439		818
440	send_req (req);	819	send_req (req);
441	}	820	}
442		821
443	void	822	void
444	aio_close(fh,callback)	823	aio_close(fh,callback=&PL_sv_undef)
445	InputStream fh	824	SV * fh
446	SV * callback	825	SV * callback
447	PROTOTYPE: $$	826	PROTOTYPE: $;$
448	ALIAS:	827	ALIAS:
449	aio_close = REQ_CLOSE	828	aio_close = REQ_CLOSE
450	aio_fsync = REQ_FSYNC	829	aio_fsync = REQ_FSYNC
451	aio_fdatasync = REQ_FDATASYNC	830	aio_fdatasync = REQ_FDATASYNC
452	CODE:	831	CODE:
453	{	832	{
		833	dREQ;
		834
		835	req->type = ix;
		836	req->fh = newSVsv (fh);
		837	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
		838
		839	send_req (req);
		840	}
		841
		842	void
		843	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
		844	SV * fh
		845	UV offset
		846	UV length
		847	SV * data
		848	UV dataoffset
		849	SV * callback
		850	ALIAS:
		851	aio_read = REQ_READ
		852	aio_write = REQ_WRITE
		853	PROTOTYPE: $$$$$;$
		854	CODE:
		855	{
454	aio_req req;	856	aio_req req;
		857	STRLEN svlen;
		858	char *svptr = SvPVbyte (data, svlen);
455		859
456	Newz (0, req, 1, aio_cb);	860	SvUPGRADE (data, SVt_PV);
		861	SvPOK_on (data);
457		862
458	if (!req)	863	if (dataoffset < 0)
459	croak ("out of memory during aio_req allocation");	864	dataoffset += svlen;
460		865
461	req->type = ix;	866	if (dataoffset < 0 \|\| dataoffset > svlen)
462	req->fd = PerlIO_fileno (fh);	867	croak ("data offset outside of string");
463	req->callback = SvREFCNT_inc (callback);
464		868
465	send_req (req);	869	if (ix == REQ_WRITE)
466	}	870	{
467		871	/* write: check length and adjust. */
468	void	872	if (length < 0 \|\| length + dataoffset > svlen)
469	aio_read(fh,offset,length,data,dataoffset,callback)	873	length = svlen - dataoffset;
470	InputStream fh	874	}
471	UV offset	875	else
472	IV length	876	{
473	SV * data	877	/* read: grow scalar as necessary */
474	IV dataoffset	878	svptr = SvGROW (data, length + dataoffset);
475	SV * callback	879	}
476	PROTOTYPE: $$$$$$
477	CODE:
478	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
479
480	void
481	aio_write(fh,offset,length,data,dataoffset,callback)
482	OutputStream fh
483	UV offset
484	IV length
485	SV * data
486	IV dataoffset
487	SV * callback
488	PROTOTYPE: $$$$$$
489	CODE:
490	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
491
492	void
493	aio_readahead(fh,offset,length,callback)
494	InputStream fh
495	UV offset
496	IV length
497	SV * callback
498	PROTOTYPE: $$$$
499	CODE:
500	{
501	aio_req req;
502		880
503	if (length < 0)	881	if (length < 0)
504	croak ("length must not be negative");	882	croak ("length must not be negative");
505		883
506	Newz (0, req, 1, aio_cb);	884	{
		885	dREQ;
507		886
508	if (!req)	887	req->type = ix;
509	croak ("out of memory during aio_req allocation");	888	req->fh = newSVsv (fh);
		889	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
		890	: IoOFP (sv_2io (fh)));
		891	req->offset = offset;
		892	req->length = length;
		893	req->data = SvREFCNT_inc (data);
		894	req->dataptr = (char *)svptr + dataoffset;
		895
		896	if (!SvREADONLY (data))
		897	{
		898	SvREADONLY_on (data);
		899	req->data2ptr = (void *)data;
		900	}
		901
		902	send_req (req);
		903	}
		904	}
		905
		906	void
		907	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		908	SV * out_fh
		909	SV * in_fh
		910	UV in_offset
		911	UV length
		912	SV * callback
		913	PROTOTYPE: $$$$;$
		914	CODE:
		915	{
		916	dREQ;
		917
		918	req->type = REQ_SENDFILE;
		919	req->fh = newSVsv (out_fh);
		920	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		921	req->fh2 = newSVsv (in_fh);
		922	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		923	req->offset = in_offset;
		924	req->length = length;
		925
		926	send_req (req);
		927	}
		928
		929	void
		930	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
		931	SV * fh
		932	UV offset
		933	IV length
		934	SV * callback
		935	PROTOTYPE: $$$;$
		936	CODE:
		937	{
		938	dREQ;
510		939
511	req->type = REQ_READAHEAD;	940	req->type = REQ_READAHEAD;
		941	req->fh = newSVsv (fh);
512	req->fd = PerlIO_fileno (fh);	942	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
513	req->offset = offset;	943	req->offset = offset;
514	req->length = length;	944	req->length = length;
515	req->callback = SvREFCNT_inc (callback);
516		945
517	send_req (req);	946	send_req (req);
518	}	947	}
519		948
520	void	949	void
521	aio_stat(fh_or_path,callback)	950	aio_stat(fh_or_path,callback=&PL_sv_undef)
522	SV * fh_or_path	951	SV * fh_or_path
523	SV * callback	952	SV * callback
524	PROTOTYPE: $$
525	ALIAS:	953	ALIAS:
		954	aio_stat = REQ_STAT
526	aio_lstat = 1	955	aio_lstat = REQ_LSTAT
527	CODE:	956	CODE:
528	{	957	{
529	aio_req req;	958	dREQ;
530
531	Newz (0, req, 1, aio_cb);
532
533	if (!req)
534	croak ("out of memory during aio_req allocation");
535		959
536	New (0, req->statdata, 1, Stat_t);	960	New (0, req->statdata, 1, Stat_t);
537
538	if (!req->statdata)	961	if (!req->statdata)
		962	{
		963	free_req (req);
539	croak ("out of memory during aio_req->statdata allocation");	964	croak ("out of memory during aio_req->statdata allocation");
		965	}
540		966
541	if (SvPOK (fh_or_path))	967	if (SvPOK (fh_or_path))
542	{	968	{
543	req->type = ix ? REQ_LSTAT : REQ_STAT;	969	req->type = ix;
544	req->data = newSVsv (fh_or_path);	970	req->data = newSVsv (fh_or_path);
545	req->dataptr = SvPV_nolen (req->data);	971	req->dataptr = SvPVbyte_nolen (req->data);
546	}	972	}
547	else	973	else
548	{	974	{
549	req->type = REQ_FSTAT;	975	req->type = REQ_FSTAT;
		976	req->fh = newSVsv (fh_or_path);
550	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	977	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
551	}	978	}
552		979
553	req->callback = SvREFCNT_inc (callback);
554
555	send_req (req);	980	send_req (req);
556	}	981	}
557		982
558	void	983	void
559	aio_unlink(pathname,callback)	984	aio_unlink(pathname,callback=&PL_sv_undef)
560	SV * pathname	985	SV * pathname
561	SV * callback	986	SV * callback
562	PROTOTYPE: $$	987	ALIAS:
		988	aio_unlink = REQ_UNLINK
		989	aio_rmdir = REQ_RMDIR
563	CODE:	990	CODE:
564	{	991	{
565	aio_req req;	992	dREQ;
566		993
567	Newz (0, req, 1, aio_cb);	994	req->type = ix;
568
569	if (!req)
570	croak ("out of memory during aio_req allocation");
571
572	req->type = REQ_UNLINK;
573	req->data = newSVsv (pathname);	995	req->data = newSVsv (pathname);
574	req->dataptr = SvPV_nolen (req->data);	996	req->dataptr = SvPVbyte_nolen (req->data);
575	req->callback = SvREFCNT_inc (callback);
576		997
577	send_req (req);	998	send_req (req);
578	}	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;
		1009
		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;
		1028	req->data = newSVsv (pathname);
		1029	req->dataptr = SvPVbyte_nolen (req->data);
		1030
		1031	send_req (req);
		1032	}
		1033
		1034	void
		1035	flush()
		1036	PROTOTYPE:
		1037	CODE:
		1038	while (nreqs)
		1039	{
		1040	poll_wait ();
		1041	poll_cb ();
		1042	}
		1043
		1044	void
		1045	poll()
		1046	PROTOTYPE:
		1047	CODE:
		1048	if (nreqs)
		1049	{
		1050	poll_wait ();
		1051	poll_cb ();
		1052	}
579		1053
580	int	1054	int
581	poll_fileno()	1055	poll_fileno()
582	PROTOTYPE:	1056	PROTOTYPE:
583	CODE:	1057	CODE:
…		…
587		1061
588	int	1062	int
589	poll_cb(...)	1063	poll_cb(...)
590	PROTOTYPE:	1064	PROTOTYPE:
591	CODE:	1065	CODE:
592	RETVAL = poll_cb (aTHX);	1066	RETVAL = poll_cb ();
593	OUTPUT:	1067	OUTPUT:
594	RETVAL	1068	RETVAL
595		1069
596	void	1070	void
597	poll_wait()	1071	poll_wait()

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.4 by root, Sun Jul 10 20:57:00 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 1.4 by root, Sun Jul 10 20:57:00 2005 UTC vs.
Revision 1.38 by root, Sun Aug 28 10:51:33 2005 UTC