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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.3 by root, Sun Jul 10 20:07:11 2005 UTC vs.
Revision 1.35 by root, Tue Aug 23 01:16:50 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
7	#include <sys/types.h>	12	#include <sys/types.h>
8	#include <sys/stat.h>	13	#include <sys/stat.h>
		14
9	#include <unistd.h>	15	#include <unistd.h>
10	#include <fcntl.h>	16	#include <fcntl.h>
11	#include <signal.h>	17	#include <signal.h>
12	#include <sched.h>	18	#include <sched.h>
13	#include <endian.h>
14		19
15	#include <pthread.h>	20	#if HAVE_SENDFILE
		21	# if __linux
		22	# include <sys/sendfile.h>
		23	# elif __freebsd
16	#include <sys/syscall.h>	24	# include <sys/socket.h>
		25	# include <sys/uio.h>
		26	# elif __hpux
		27	# include <sys/socket.h>
		28	# elif __solaris /* not yet */
		29	# include <sys/sendfile.h>
		30	# else
		31	# error sendfile support requested but not available
		32	# endif
		33	#endif
17		34
18	typedef void InputStream; / hack, but 5.6.1 is simply toooo old ;) */
19	typedef void OutputStream; / hack, but 5.6.1 is simply toooo old ;) */
20	typedef void InOutStream; / hack, but 5.6.1 is simply toooo old ;) */
21
22	#if __i386 \|\| __amd64
23	# define STACKSIZE ( 256 * sizeof (long))
24	#elif __ia64	35	#if __ia64
25	# define STACKSIZE (8192 * sizeof (long))	36	# define STACKSIZE 65536
26	#else	37	#else
27	# define STACKSIZE ( 512 * sizeof (long))	38	# define STACKSIZE 4096
28	#endif	39	#endif
29		40
30	enum {	41	enum {
31	REQ_QUIT,	42	REQ_QUIT,
32	REQ_OPEN, REQ_CLOSE,	43	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,	44	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		45	REQ_SENDFILE,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,	46	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,	47	REQ_FSYNC, REQ_FDATASYNC,
		48	REQ_UNLINK, REQ_RMDIR,
		49	REQ_SYMLINK,
36	};	50	};
37		51
38	typedef struct aio_cb {	52	typedef struct aio_cb {
39	struct aio_cb *volatile next;	53	struct aio_cb *volatile next;
40		54
41	int type;	55	int type;
42		56
43	int fd;	57	int fd, fd2;
44	off_t offset;	58	off_t offset;
45	size_t length;	59	size_t length;
46	ssize_t result;	60	ssize_t result;
47	mode_t mode; /* open */	61	mode_t mode; /* open */
48	int errorno;	62	int errorno;
49	SV data, callback;	63	SV data, callback;
50	void *dataptr;	64	SV fh, fh2;
		65	void dataptr, data2ptr;
51	STRLEN dataoffset;	66	STRLEN dataoffset;
52		67
53	Stat_t *statdata;	68	Stat_t *statdata;
54	} aio_cb;	69	} aio_cb;
55		70
56	typedef aio_cb *aio_req;	71	typedef aio_cb *aio_req;
57		72
58	static int started;	73	static int started, wanted;
59	static int nreqs;	74	static volatile int nreqs;
		75	static int max_outstanding = 1<<30;
60	static int respipe [2];	76	static int respipe [2];
61		77
62	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	78	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
63	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	79	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
64	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	80	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
65		81
66	static volatile aio_req reqs, reqe; /* queue start, queue end */	82	static volatile aio_req reqs, reqe; /* queue start, queue end */
67	static volatile aio_req ress, rese; /* queue start, queue end */	83	static volatile aio_req ress, rese; /* queue start, queue end */
68		84
		85	static void free_req (aio_req req)
		86	{
		87	if (req->data)
		88	SvREFCNT_dec (req->data);
		89
		90	if (req->fh)
		91	SvREFCNT_dec (req->fh);
		92
		93	if (req->fh2)
		94	SvREFCNT_dec (req->fh2);
		95
		96	if (req->statdata)
		97	Safefree (req->statdata);
		98
		99	if (req->callback)
		100	SvREFCNT_dec (req->callback);
		101
		102	Safefree (req);
		103	}
		104
		105	static void
		106	poll_wait ()
		107	{
		108	if (nreqs && !ress)
		109	{
		110	fd_set rfd;
		111	FD_ZERO(&rfd);
		112	FD_SET(respipe [0], &rfd);
		113
		114	select (respipe [0] + 1, &rfd, 0, 0, 0);
		115	}
		116	}
		117
		118	static int
		119	poll_cb ()
		120	{
		121	dSP;
		122	int count = 0;
		123	int do_croak = 0;
		124	aio_req req;
		125
		126	for (;;)
		127	{
		128	pthread_mutex_lock (&reslock);
		129	req = ress;
		130
		131	if (req)
		132	{
		133	ress = req->next;
		134
		135	if (!ress)
		136	{
		137	/* read any signals sent by the worker threads */
		138	char buf [32];
		139	while (read (respipe [0], buf, 32) == 32)
		140	;
		141
		142	rese = 0;
		143	}
		144	}
		145
		146	pthread_mutex_unlock (&reslock);
		147
		148	if (!req)
		149	break;
		150
		151	nreqs--;
		152
		153	if (req->type == REQ_QUIT)
		154	started--;
		155	else
		156	{
		157	int errorno = errno;
		158	errno = req->errorno;
		159
		160	if (req->type == REQ_READ)
		161	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		162
		163	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
		164	SvREADONLY_off (req->data);
		165
		166	if (req->statdata)
		167	{
		168	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		169	PL_laststatval = req->result;
		170	PL_statcache = *(req->statdata);
		171	}
		172
		173	ENTER;
		174	PUSHMARK (SP);
		175	XPUSHs (sv_2mortal (newSViv (req->result)));
		176
		177	if (req->type == REQ_OPEN)
		178	{
		179	/* convert fd to fh */
		180	SV *fh;
		181
		182	PUTBACK;
		183	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		184	SPAGAIN;
		185
		186	fh = SvREFCNT_inc (POPs);
		187
		188	PUSHMARK (SP);
		189	XPUSHs (sv_2mortal (fh));
		190	}
		191
		192	if (SvOK (req->callback))
		193	{
		194	PUTBACK;
		195	call_sv (req->callback, G_VOID \| G_EVAL);
		196	SPAGAIN;
		197
		198	if (SvTRUE (ERRSV))
		199	{
		200	free_req (req);
		201	croak (0);
		202	}
		203	}
		204
		205	LEAVE;
		206
		207	errno = errorno;
		208	count++;
		209	}
		210
		211	free_req (req);
		212	}
		213
		214	return count;
		215	}
		216
69	static void aio_proc(void arg);	217	static void aio_proc(void arg);
70		218
71	static void	219	static void
72	start_thread (void)	220	start_thread (void)
73	{	221	{
89	}	237	}
90		238
91	static void	239	static void
92	send_req (aio_req req)	240	send_req (aio_req req)
93	{	241	{
		242	while (started < wanted && nreqs >= started)
		243	start_thread ();
		244
94	nreqs++;	245	nreqs++;
95		246
96	pthread_mutex_lock (&reqlock);	247	pthread_mutex_lock (&reqlock);
97		248
98	req->next = 0;	249	req->next = 0;
…		…
105	else	256	else
106	reqe = reqs = req;	257	reqe = reqs = req;
107		258
108	pthread_cond_signal (&reqwait);	259	pthread_cond_signal (&reqwait);
109	pthread_mutex_unlock (&reqlock);	260	pthread_mutex_unlock (&reqlock);
		261
		262	if (nreqs > max_outstanding)
		263	for (;;)
		264	{
		265	poll_cb ();
		266
		267	if (nreqs <= max_outstanding)
		268	break;
		269
		270	poll_wait ();
		271	}
110	}	272	}
111		273
112	static void	274	static void
113	end_thread (void)	275	end_thread (void)
114	{	276	{
115	aio_req req;	277	aio_req req;
116	New (0, req, 1, aio_cb);	278	Newz (0, req, 1, aio_cb);
117	req->type = REQ_QUIT;	279	req->type = REQ_QUIT;
118		280
119	send_req (req);	281	send_req (req);
120	}	282	}
121		283
122	static void	284	static void min_parallel (int nthreads)
123	read_write (pTHX_
124	int dowrite, int fd, off_t offset, size_t length,
125	SV data, STRLEN dataoffset, SV callback)
126	{	285	{
127	aio_req req;	286	if (wanted < nthreads)
128	STRLEN svlen;	287	wanted = nthreads;
129	char *svptr = SvPV (data, svlen);	288	}
130		289
131	SvUPGRADE (data, SVt_PV);	290	static void max_parallel (int nthreads)
132	SvPOK_on (data);	291	{
		292	int cur = started;
133		293
134	if (dataoffset < 0)	294	if (wanted > nthreads)
135	dataoffset += svlen;	295	wanted = nthreads;
136		296
137	if (dataoffset < 0 \|\| dataoffset > svlen)	297	while (cur > wanted)
138	croak ("data offset outside of string");
139
140	if (dowrite)
141	{	298	{
142	/* write: check length and adjust. */	299	end_thread ();
143	if (length < 0 \|\| length + dataoffset > svlen)	300	cur--;
144	length = svlen - dataoffset;
145	}	301	}
146	else	302
		303	while (started > wanted)
147	{	304	{
148	/* read: grow scalar as necessary */	305	poll_wait ();
149	svptr = SvGROW (data, length + dataoffset);	306	poll_cb ();
150	}	307	}
151
152	if (length < 0)
153	croak ("length must not be negative");
154
155	Newz (0, req, 1, aio_cb);
156
157	if (!req)
158	croak ("out of memory during aio_req allocation");
159
160	req->type = dowrite ? REQ_WRITE : REQ_READ;
161	req->fd = fd;
162	req->offset = offset;
163	req->length = length;
164	req->data = SvREFCNT_inc (data);
165	req->dataptr = (char *)svptr + dataoffset;
166	req->callback = SvREFCNT_inc (callback);
167
168	send_req (req);
169	}	308	}
170		309
171	static void	310	static void create_pipe ()
172	poll_wait ()
173	{	311	{
174	if (!nreqs)	312	if (pipe (respipe))
175	return;	313	croak ("unable to initialize result pipe");
176		314
177	fd_set rfd;	315	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
178	FD_ZERO(&rfd);	316	croak ("cannot set result pipe to nonblocking mode");
179	FD_SET(respipe [0], &rfd);
180		317
181	select (respipe [0] + 1, &rfd, 0, 0, 0);	318	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		319	croak ("cannot set result pipe to nonblocking mode");
182	}	320	}
183		321
184	static int	322	static void atfork_prepare (void)
185	poll_cb (pTHX)
186	{	323	{
187	dSP;	324	pthread_mutex_lock (&reqlock);
188	int count = 0;	325	pthread_mutex_lock (&reslock);
		326	}
		327
		328	static void atfork_parent (void)
		329	{
		330	pthread_mutex_unlock (&reslock);
		331	pthread_mutex_unlock (&reqlock);
		332	}
		333
		334	static void atfork_child (void)
		335	{
189	aio_req req;	336	aio_req prv;
190
191	{
192	/* read and signals sent by the worker threads */
193	char buf [32];
194	while (read (respipe [0], buf, 32) > 0)
195	;
196	}
197		337
198	for (;;)	338	started = 0;
		339
		340	while (reqs)
199	{	341	{
200	pthread_mutex_lock (&reslock);	342	prv = reqs;
201
202	req = ress;
203
204	if (ress)
205	{
206	ress = ress->next;	343	reqs = prv->next;
207	if (!ress) rese = 0;	344	free_req (prv);
208	}
209
210	pthread_mutex_unlock (&reslock);
211
212	if (!req)
213	break;
214
215	nreqs--;
216
217	if (req->type == REQ_QUIT)
218	started--;
219	else
220	{
221	int errorno = errno;
222	errno = req->errorno;
223
224	if (req->type == REQ_READ)
225	SvCUR_set (req->data, req->dataoffset
226	+ req->result > 0 ? req->result : 0);
227
228	if (req->data)
229	SvREFCNT_dec (req->data);
230
231	if (req->type == REQ_STAT \|\| req->type == REQ_LSTAT \|\| req->type == REQ_FSTAT)
232	{
233	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
234	PL_laststatval = req->result;
235	PL_statcache = *(req->statdata);
236
237	Safefree (req->statdata);
238	}
239
240	PUSHMARK (SP);
241	XPUSHs (sv_2mortal (newSViv (req->result)));
242
243	if (req->type == REQ_OPEN)
244	{
245	/* convert fd to fh */
246	SV *fh;
247
248	PUTBACK;
249	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
250	SPAGAIN;
251
252	fh = POPs;
253
254	PUSHMARK (SP);
255	XPUSHs (fh);
256	}
257
258	PUTBACK;
259	call_sv (req->callback, G_VOID \| G_EVAL);
260	SPAGAIN;
261
262	if (req->callback)
263	SvREFCNT_dec (req->callback);
264
265	errno = errorno;
266	count++;
267	}
268
269	Safefree (req);
270	}	345	}
271		346
272	return count;	347	reqs = reqe = 0;
		348
		349	while (ress)
		350	{
		351	prv = ress;
		352	ress = prv->next;
		353	free_req (prv);
		354	}
		355
		356	ress = rese = 0;
		357
		358	close (respipe [0]);
		359	close (respipe [1]);
		360	create_pipe ();
		361
		362	atfork_parent ();
273	}	363	}
		364
		365	/* currently noops */
		366	#define LOCK_FD(fd) do { } while (0)
		367	#define UNLOCK_FD(fd) do { } while (0)
		368
		369	/*****************************************************************************/
		370	/* work around various missing functions */
		371
		372	#if !HAVE_PREADWRITE
		373	# define pread aio_pread
		374	# define pwrite aio_pwrite
		375
		376	/*
		377	* make our pread/pwrite safe against themselves, but not against
		378	* normal read/write by using a mutex. slows down execution a lot,
		379	* but that's your problem, not mine.
		380	*/
		381	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
		382
		383	static ssize_t
		384	pread (int fd, void *buf, size_t count, off_t offset)
		385	{
		386	ssize_t res;
		387	off_t ooffset;
		388
		389	LOCK_FD (fd);
		390	pthread_mutex_lock (&iolock); /* replace by LOCK_FD and private buffer */
		391	ooffset = lseek (fd, 0, SEEK_CUR);
		392	lseek (fd, offset, SEEK_SET);
		393	res = read (fd, buf, count);
		394	lseek (fd, ooffset, SEEK_SET);
		395	pthread_mutex_unlock (&iolock);
		396	UNLOCK_FD (d);
		397
		398	return res;
		399	}
		400
		401	static ssize_t
		402	pwrite (int fd, void *buf, size_t count, off_t offset)
		403	{
		404	ssize_t res;
		405	off_t ooffset;
		406
		407	LOCK_FD (fd);
		408	pthread_mutex_lock (&iolock); /* replace by LOCK_FD and private buffer */
		409	ooffset = lseek (fd, 0, SEEK_CUR);
		410	lseek (fd, offset, SEEK_SET);
		411	res = write (fd, buf, count);
		412	lseek (fd, offset, SEEK_SET);
		413	pthread_mutex_unlock (&iolock);
		414	UNLOCK_FD (d);
		415
		416	return res;
		417	}
		418	#endif
		419
		420	#if !HAVE_FDATASYNC
		421	# define fdatasync fsync
		422	#endif
		423
		424	#if !HAVE_READAHEAD
		425	# define readahead aio_readahead
		426
		427	static char readahead_buf[4096];
		428
		429	static ssize_t
		430	readahead (int fd, off_t offset, size_t count)
		431	{
		432	while (count > 0)
		433	{
		434	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
		435
		436	pread (fd, readahead_buf, len, offset);
		437	offset += len;
		438	count -= len;
		439	}
		440
		441	errno = 0;
		442	}
		443	#endif
		444
		445	/* sendfile always needs emulation */
		446	static ssize_t
		447	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
		448	{
		449	ssize_t res;
		450
		451	if (!count)
		452	return 0;
		453
		454	LOCK_FD (ofd);
		455
		456	#if HAVE_SENDFILE
		457	# if __linux
		458	res = sendfile (ofd, ifd, &offset, count);
		459
		460	# elif __freebsd
		461	/*
		462	* Of course, the freebsd sendfile is a dire hack with no thoughts
		463	* wasted on making it similar to other I/O functions.
		464	*/
		465	{
		466	off_t sbytes;
		467	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		468
		469	if (res < 0 && sbytes)
		470	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
		471	res = sbytes;
		472	}
		473
		474	# elif __hpux
		475	res = sendfile (ofd, ifd, offset, count, 0, 0);
		476
		477	# elif __solaris
		478	{
		479	struct sendfilevec vec;
		480	size_t sbytes;
		481
		482	vec.sfv_fd = ifd;
		483	vec.sfv_flag = 0;
		484	vec.sfv_off = offset;
		485	vec.sfv_len = count;
		486
		487	res = sendfilev (ofd, &vec, 1, &sbytes);
		488
		489	if (res < 0 && sbytes)
		490	res = sbytes;
		491	}
		492
		493	# else
		494	res = -1;
		495	errno = ENOSYS;
		496	# endif
		497	#endif
		498
		499	if (res < 0
		500	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK
		501	#if __solaris
		502	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE
		503	#endif
		504	)
		505	)
		506	{
		507	/* emulate sendfile. this is a major pain in the ass */
		508	char *buf = malloc (4096);
		509	res = 0;
		510
		511	for (;;)
		512	{
		513	ssize_t cnt;
		514
		515	cnt = pread (ifd, buf, 4096, offset);
		516
		517	if (cnt <= 0)
		518	{
		519	if (cnt && !res) res = -1;
		520	break;
		521	}
		522
		523	cnt = write (ofd, buf, cnt);
		524
		525	if (cnt <= 0)
		526	{
		527	if (cnt && !res) res = -1;
		528	break;
		529	}
		530
		531	offset += cnt;
		532	res += cnt;
		533	}
		534
		535	{
		536	int errorno = errno;
		537	free (buf);
		538	errno = errorno;
		539	}
		540	}
		541
		542	UNLOCK_FD (ofd);
		543
		544	return res;
		545	}
		546
		547	/*****************************************************************************/
274		548
275	static void *	549	static void *
276	aio_proc (void *thr_arg)	550	aio_proc (void *thr_arg)
277	{	551	{
278	aio_req req;	552	aio_req req;
…		…
304		578
305	type = req->type;	579	type = req->type;
306		580
307	switch (type)	581	switch (type)
308	{	582	{
309	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;	583	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
310	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;	584	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
311	#if SYS_readahead	585
312	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	586	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
313	#else	587	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
314	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
315	#endif
316		588
317	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	589	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
318	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	590	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
319	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	591	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
320		592
321	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	593	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
322	case REQ_CLOSE: req->result = close (req->fd); break;	594	case REQ_CLOSE: req->result = close (req->fd); break;
323	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	595	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
		596	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		597	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
324		598
		599	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
325	case REQ_FSYNC: req->result = fsync (req->fd); break;	600	case REQ_FSYNC: req->result = fsync (req->fd); break;
326	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
327		601
328	case REQ_QUIT:	602	case REQ_QUIT:
329	break;	603	break;
330		604
331	default:	605	default:
…		…
357	while (type != REQ_QUIT);	631	while (type != REQ_QUIT);
358		632
359	return 0;	633	return 0;
360	}	634	}
361		635
		636	#define dREQ \
		637	aio_req req; \
		638	\
		639	if (SvOK (callback) && !SvROK (callback)) \
		640	croak ("clalback must be undef or of reference type"); \
		641	\
		642	Newz (0, req, 1, aio_cb); \
		643	if (!req) \
		644	croak ("out of memory during aio_req allocation"); \
		645	\
		646	req->callback = newSVsv (callback);
		647
362	MODULE = IO::AIO PACKAGE = IO::AIO	648	MODULE = IO::AIO PACKAGE = IO::AIO
363		649
		650	PROTOTYPES: ENABLE
		651
364	BOOT:	652	BOOT:
365	{	653	{
366	if (pipe (respipe))	654	create_pipe ();
367	croak ("unable to initialize result pipe");	655	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
368
369	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
370	croak ("cannot set result pipe to nonblocking mode");
371
372	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
373	croak ("cannot set result pipe to nonblocking mode");
374	}	656	}
375		657
376	void	658	void
377	min_parallel(nthreads)	659	min_parallel(nthreads)
378	int nthreads	660	int nthreads
379	PROTOTYPE: $	661	PROTOTYPE: $
380	CODE:
381	while (nthreads > started)
382	start_thread ();
383		662
384	void	663	void
385	max_parallel(nthreads)	664	max_parallel(nthreads)
386	int nthreads	665	int nthreads
387	PROTOTYPE: $	666	PROTOTYPE: $
		667
		668	int
		669	max_outstanding(nreqs)
		670	int nreqs
		671	PROTOTYPE: $
388	CODE:	672	CODE:
389	{	673	RETVAL = max_outstanding;
390	int cur = started;	674	max_outstanding = nreqs;
391	while (cur > nthreads)
392	{
393	end_thread ();
394	cur--;
395	}
396		675
397	while (started > nthreads)
398	{
399	poll_wait ();
400	poll_cb (aTHX);
401	}
402	}
403
404	void	676	void
405	aio_open(pathname,flags,mode,callback)	677	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
406	SV * pathname	678	SV * pathname
407	int flags	679	int flags
408	int mode	680	int mode
409	SV * callback	681	SV * callback
410	PROTOTYPE: $$$$	682	PROTOTYPE: $$$;$
411	CODE:	683	CODE:
412	{	684	{
413	aio_req req;	685	dREQ;
414
415	Newz (0, req, 1, aio_cb);
416
417	if (!req)
418	croak ("out of memory during aio_req allocation");
419		686
420	req->type = REQ_OPEN;	687	req->type = REQ_OPEN;
421	req->data = newSVsv (pathname);	688	req->data = newSVsv (pathname);
422	req->dataptr = SvPV_nolen (req->data);	689	req->dataptr = SvPVbyte_nolen (req->data);
423	req->fd = flags;	690	req->fd = flags;
424	req->mode = mode;	691	req->mode = mode;
425	req->callback = SvREFCNT_inc (callback);
426		692
427	send_req (req);	693	send_req (req);
428	}	694	}
429		695
430	void	696	void
431	aio_close(fh,callback)	697	aio_close(fh,callback=&PL_sv_undef)
432	InputStream fh	698	SV * fh
433	SV * callback	699	SV * callback
434	PROTOTYPE: $$	700	PROTOTYPE: $;$
435	ALIAS:	701	ALIAS:
436	aio_close = REQ_CLOSE	702	aio_close = REQ_CLOSE
437	aio_fsync = REQ_FSYNC	703	aio_fsync = REQ_FSYNC
438	aio_fdatasync = REQ_FDATASYNC	704	aio_fdatasync = REQ_FDATASYNC
439	CODE:	705	CODE:
440	{	706	{
		707	dREQ;
		708
		709	req->type = ix;
		710	req->fh = newSVsv (fh);
		711	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
		712
		713	send_req (req);
		714	}
		715
		716	void
		717	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
		718	SV * fh
		719	UV offset
		720	UV length
		721	SV * data
		722	UV dataoffset
		723	SV * callback
		724	ALIAS:
		725	aio_read = REQ_READ
		726	aio_write = REQ_WRITE
		727	PROTOTYPE: $$$$$;$
		728	CODE:
		729	{
441	aio_req req;	730	aio_req req;
		731	STRLEN svlen;
		732	char *svptr = SvPVbyte (data, svlen);
442		733
443	Newz (0, req, 1, aio_cb);	734	SvUPGRADE (data, SVt_PV);
		735	SvPOK_on (data);
444		736
445	if (!req)	737	if (dataoffset < 0)
446	croak ("out of memory during aio_req allocation");	738	dataoffset += svlen;
447		739
448	req->type = ix;	740	if (dataoffset < 0 \|\| dataoffset > svlen)
449	req->fd = PerlIO_fileno (fh);	741	croak ("data offset outside of string");
450	req->callback = SvREFCNT_inc (callback);
451		742
452	send_req (req);	743	if (ix == REQ_WRITE)
453	}	744	{
454		745	/* write: check length and adjust. */
455	void	746	if (length < 0 \|\| length + dataoffset > svlen)
456	aio_read(fh,offset,length,data,dataoffset,callback)	747	length = svlen - dataoffset;
457	InputStream fh	748	}
458	UV offset	749	else
459	IV length	750	{
460	SV * data	751	/* read: grow scalar as necessary */
461	IV dataoffset	752	svptr = SvGROW (data, length + dataoffset);
462	SV * callback	753	}
463	PROTOTYPE: $$$$$$
464	CODE:
465	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
466
467	void
468	aio_write(fh,offset,length,data,dataoffset,callback)
469	OutputStream fh
470	UV offset
471	IV length
472	SV * data
473	IV dataoffset
474	SV * callback
475	PROTOTYPE: $$$$$$
476	CODE:
477	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
478
479	void
480	aio_readahead(fh,offset,length,callback)
481	InputStream fh
482	UV offset
483	IV length
484	SV * callback
485	PROTOTYPE: $$$$
486	CODE:
487	{
488	aio_req req;
489		754
490	if (length < 0)	755	if (length < 0)
491	croak ("length must not be negative");	756	croak ("length must not be negative");
492		757
493	Newz (0, req, 1, aio_cb);	758	{
		759	dREQ;
494		760
495	if (!req)	761	req->type = ix;
496	croak ("out of memory during aio_req allocation");	762	req->fh = newSVsv (fh);
		763	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
		764	: IoOFP (sv_2io (fh)));
		765	req->offset = offset;
		766	req->length = length;
		767	req->data = SvREFCNT_inc (data);
		768	req->dataptr = (char *)svptr + dataoffset;
		769
		770	if (!SvREADONLY (data))
		771	{
		772	SvREADONLY_on (data);
		773	req->data2ptr = (void *)data;
		774	}
		775
		776	send_req (req);
		777	}
		778	}
		779
		780	void
		781	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		782	SV * out_fh
		783	SV * in_fh
		784	UV in_offset
		785	UV length
		786	SV * callback
		787	PROTOTYPE: $$$$;$
		788	CODE:
		789	{
		790	dREQ;
		791
		792	req->type = REQ_SENDFILE;
		793	req->fh = newSVsv (out_fh);
		794	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		795	req->fh2 = newSVsv (in_fh);
		796	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		797	req->offset = in_offset;
		798	req->length = length;
		799
		800	send_req (req);
		801	}
		802
		803	void
		804	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
		805	SV * fh
		806	UV offset
		807	IV length
		808	SV * callback
		809	PROTOTYPE: $$$;$
		810	CODE:
		811	{
		812	dREQ;
497		813
498	req->type = REQ_READAHEAD;	814	req->type = REQ_READAHEAD;
		815	req->fh = newSVsv (fh);
499	req->fd = PerlIO_fileno (fh);	816	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
500	req->offset = offset;	817	req->offset = offset;
501	req->length = length;	818	req->length = length;
502	req->callback = SvREFCNT_inc (callback);
503		819
504	send_req (req);	820	send_req (req);
505	}	821	}
506		822
507	void	823	void
508	aio_stat(fh_or_path,callback)	824	aio_stat(fh_or_path,callback=&PL_sv_undef)
509	SV * fh_or_path	825	SV * fh_or_path
510	SV * callback	826	SV * callback
511	PROTOTYPE: $$
512	ALIAS:	827	ALIAS:
		828	aio_stat = REQ_STAT
513	aio_lstat = 1	829	aio_lstat = REQ_LSTAT
514	CODE:	830	CODE:
515	{	831	{
516	aio_req req;	832	dREQ;
517
518	Newz (0, req, 1, aio_cb);
519
520	if (!req)
521	croak ("out of memory during aio_req allocation");
522		833
523	New (0, req->statdata, 1, Stat_t);	834	New (0, req->statdata, 1, Stat_t);
524
525	if (!req->statdata)	835	if (!req->statdata)
		836	{
		837	free_req (req);
526	croak ("out of memory during aio_req->statdata allocation");	838	croak ("out of memory during aio_req->statdata allocation");
		839	}
527		840
528	if (SvPOK (fh_or_path))	841	if (SvPOK (fh_or_path))
529	{	842	{
530	req->type = ix ? REQ_LSTAT : REQ_STAT;	843	req->type = ix;
531	req->data = newSVsv (fh_or_path);	844	req->data = newSVsv (fh_or_path);
532	req->dataptr = SvPV_nolen (req->data);	845	req->dataptr = SvPVbyte_nolen (req->data);
533	}	846	}
534	else	847	else
535	{	848	{
536	req->type = REQ_FSTAT;	849	req->type = REQ_FSTAT;
		850	req->fh = newSVsv (fh_or_path);
537	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	851	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
538	}	852	}
539		853
540	req->callback = SvREFCNT_inc (callback);
541
542	send_req (req);	854	send_req (req);
543	}	855	}
544		856
545	void	857	void
546	aio_unlink(pathname,callback)	858	aio_unlink(pathname,callback=&PL_sv_undef)
547	SV * pathname	859	SV * pathname
548	SV * callback	860	SV * callback
549	PROTOTYPE: $$	861	ALIAS:
		862	aio_unlink = REQ_UNLINK
		863	aio_rmdir = REQ_RMDIR
550	CODE:	864	CODE:
551	{	865	{
552	aio_req req;	866	dREQ;
553		867
554	Newz (0, req, 1, aio_cb);	868	req->type = ix;
555
556	if (!req)
557	croak ("out of memory during aio_req allocation");
558
559	req->type = REQ_UNLINK;
560	req->data = newSVsv (pathname);	869	req->data = newSVsv (pathname);
561	req->dataptr = SvPV_nolen (req->data);	870	req->dataptr = SvPVbyte_nolen (req->data);
562	req->callback = SvREFCNT_inc (callback);
563		871
564	send_req (req);	872	send_req (req);
565	}	873	}
		874
		875	void
		876	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)
		877	SV * oldpath
		878	SV * newpath
		879	SV * callback
		880	CODE:
		881	{
		882	dREQ;
		883
		884	req->type = REQ_SYMLINK;
		885	req->fh = newSVsv (oldpath);
		886	req->data2ptr = SvPVbyte_nolen (req->fh);
		887	req->data = newSVsv (newpath);
		888	req->dataptr = SvPVbyte_nolen (req->data);
		889
		890	send_req (req);
		891	}
		892
		893	void
		894	flush()
		895	PROTOTYPE:
		896	CODE:
		897	while (nreqs)
		898	{
		899	poll_wait ();
		900	poll_cb ();
		901	}
		902
		903	void
		904	poll()
		905	PROTOTYPE:
		906	CODE:
		907	if (nreqs)
		908	{
		909	poll_wait ();
		910	poll_cb ();
		911	}
566		912
567	int	913	int
568	poll_fileno()	914	poll_fileno()
569	PROTOTYPE:	915	PROTOTYPE:
570	CODE:	916	CODE:
…		…
574		920
575	int	921	int
576	poll_cb(...)	922	poll_cb(...)
577	PROTOTYPE:	923	PROTOTYPE:
578	CODE:	924	CODE:
579	RETVAL = poll_cb (aTHX);	925	RETVAL = poll_cb ();
580	OUTPUT:	926	OUTPUT:
581	RETVAL	927	RETVAL
582		928
583	void	929	void
584	poll_wait()	930	poll_wait()

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.3 by root, Sun Jul 10 20:07:11 2005 UTC vs. Revision 1.35 by root, Tue Aug 23 01:16:50 2005 UTC

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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.3 by root, Sun Jul 10 20:07:11 2005 UTC vs.
Revision 1.35 by root, Tue Aug 23 01:16:50 2005 UTC