[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 1.22 by root, Tue Aug 16 22:22:18 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
7	#include <sys/types.h>	10	#include <sys/types.h>
8	#include <sys/stat.h>	11	#include <sys/stat.h>
		12
9	#include <unistd.h>	13	#include <unistd.h>
10	#include <fcntl.h>	14	#include <fcntl.h>
11	#include <signal.h>	15	#include <signal.h>
12	#include <sched.h>	16	#include <sched.h>
13	#include <endian.h>
14		17
15	#include <pthread.h>	18	#include <pthread.h>
16	#include <sys/syscall.h>
17		19
18	typedef void InputStream; / hack, but 5.6.1 is simply toooo old ;) */	20	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 ;) */	21	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 ;) */	22	typedef void InOutStream; / hack, but 5.6.1 is simply toooo old ;) */
21		23
22	#if __i386 \|\| __amd64
23	# define STACKSIZE ( 256 * sizeof (long))
24	#elif __ia64	24	#if __ia64
25	# define STACKSIZE (8192 * sizeof (long))	25	# define STACKSIZE 65536
26	#else	26	#else
27	# define STACKSIZE ( 512 * sizeof (long))	27	# define STACKSIZE 4096
28	#endif	28	#endif
29		29
30	enum {	30	enum {
31	REQ_QUIT,	31	REQ_QUIT,
32	REQ_OPEN, REQ_CLOSE,	32	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,	33	REQ_READ, REQ_WRITE, REQ_READAHEAD,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,	34	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,	35	REQ_FSYNC, REQ_FDATASYNC,
		36	REQ_UNLINK, REQ_RMDIR, REQ_SYMLINK,
		37	REQ_SYMLINK,
36	};	38	};
37		39
38	typedef struct aio_cb {	40	typedef struct aio_cb {
39	struct aio_cb *volatile next;	41	struct aio_cb *volatile next;
40		42
44	off_t offset;	46	off_t offset;
45	size_t length;	47	size_t length;
46	ssize_t result;	48	ssize_t result;
47	mode_t mode; /* open */	49	mode_t mode; /* open */
48	int errorno;	50	int errorno;
49	SV data, callback;	51	SV data, callback, *fh;
50	void *dataptr;	52	void dataptr, data2ptr;
51	STRLEN dataoffset;	53	STRLEN dataoffset;
52		54
53	Stat_t *statdata;	55	Stat_t *statdata;
54	} aio_cb;	56	} aio_cb;
55		57
56	typedef aio_cb *aio_req;	58	typedef aio_cb *aio_req;
57		59
58	static int started;	60	static int started;
59	static int nreqs;	61	static volatile int nreqs;
		62	static int max_outstanding = 1<<30;
60	static int respipe [2];	63	static int respipe [2];
61		64
62	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
63	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
		67	static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
64	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	68	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
65		69
66	static volatile aio_req reqs, reqe; /* queue start, queue end */	70	static volatile aio_req reqs, reqe; /* queue start, queue end */
67	static volatile aio_req ress, rese; /* queue start, queue end */	71	static volatile aio_req ress, rese; /* queue start, queue end */
		72
		73	static void
		74	poll_wait ()
		75	{
		76	if (nreqs && !ress)
		77	{
		78	fd_set rfd;
		79	FD_ZERO(&rfd);
		80	FD_SET(respipe [0], &rfd);
		81
		82	select (respipe [0] + 1, &rfd, 0, 0, 0);
		83	}
		84	}
		85
		86	static int
		87	poll_cb ()
		88	{
		89	dSP;
		90	int count = 0;
		91	aio_req req, prv;
		92
		93	pthread_mutex_lock (&reslock);
		94
		95	{
		96	/* read any signals sent by the worker threads */
		97	char buf [32];
		98	while (read (respipe [0], buf, 32) == 32)
		99	;
		100	}
		101
		102	req = ress;
		103	ress = rese = 0;
		104
		105	pthread_mutex_unlock (&reslock);
		106
		107	while (req)
		108	{
		109	nreqs--;
		110
		111	if (req->type == REQ_QUIT)
		112	started--;
		113	else
		114	{
		115	int errorno = errno;
		116	errno = req->errorno;
		117
		118	if (req->type == REQ_READ)
		119	SvCUR_set (req->data, req->dataoffset
		120	+ req->result > 0 ? req->result : 0);
		121
		122	if (req->data)
		123	SvREFCNT_dec (req->data);
		124
		125	if (req->fh)
		126	SvREFCNT_dec (req->fh);
		127
		128	if (req->type == REQ_STAT \|\| req->type == REQ_LSTAT \|\| req->type == REQ_FSTAT)
		129	{
		130	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		131	PL_laststatval = req->result;
		132	PL_statcache = *(req->statdata);
		133
		134	Safefree (req->statdata);
		135	}
		136
		137	ENTER;
		138	PUSHMARK (SP);
		139	XPUSHs (sv_2mortal (newSViv (req->result)));
		140
		141	if (req->type == REQ_OPEN)
		142	{
		143	/* convert fd to fh */
		144	SV *fh;
		145
		146	PUTBACK;
		147	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		148	SPAGAIN;
		149
		150	fh = SvREFCNT_inc (POPs);
		151
		152	PUSHMARK (SP);
		153	XPUSHs (sv_2mortal (fh));
		154	}
		155
		156	if (SvOK (req->callback))
		157	{
		158	PUTBACK;
		159	call_sv (req->callback, G_VOID \| G_EVAL);
		160	SPAGAIN;
		161	}
		162
		163	LEAVE;
		164
		165	if (req->callback)
		166	SvREFCNT_dec (req->callback);
		167
		168	errno = errorno;
		169	count++;
		170	}
		171
		172	prv = req;
		173	req = req->next;
		174	Safefree (prv);
		175
		176	/* TODO: croak on errors? */
		177	}
		178
		179	return count;
		180	}
68		181
69	static void aio_proc(void arg);	182	static void aio_proc(void arg);
70		183
71	static void	184	static void
72	start_thread (void)	185	start_thread (void)
…		…
105	else	218	else
106	reqe = reqs = req;	219	reqe = reqs = req;
107		220
108	pthread_cond_signal (&reqwait);	221	pthread_cond_signal (&reqwait);
109	pthread_mutex_unlock (&reqlock);	222	pthread_mutex_unlock (&reqlock);
		223
		224	while (nreqs > max_outstanding)
		225	{
		226	poll_wait ();
		227	poll_cb ();
		228	}
110	}	229	}
111		230
112	static void	231	static void
113	end_thread (void)	232	end_thread (void)
114	{	233	{
…		…
117	req->type = REQ_QUIT;	236	req->type = REQ_QUIT;
118		237
119	send_req (req);	238	send_req (req);
120	}	239	}
121		240
122	static void
123	read_write (pTHX_
124	int dowrite, int fd, off_t offset, size_t length,
125	SV data, STRLEN dataoffset, SV callback)
126	{
127	aio_req req;
128	STRLEN svlen;
129	char *svptr = SvPV (data, svlen);
130		241
131	SvUPGRADE (data, SVt_PV);	242	static void min_parallel (int nthreads)
132	SvPOK_on (data);	243	{
		244	while (nthreads > started)
		245	start_thread ();
		246	}
133		247
134	if (dataoffset < 0)	248	static void max_parallel (int nthreads)
135	dataoffset += svlen;	249	{
		250	int cur = started;
		251	while (cur > nthreads)
		252	{
		253	end_thread ();
		254	cur--;
		255	}
136		256
137	if (dataoffset < 0 \|\| dataoffset > svlen)	257	while (started > nthreads)
138	croak ("data offset outside of string");
139
140	if (dowrite)
141	{	258	{
142	/* write: check length and adjust. */	259	poll_wait ();
143	if (length < 0 \|\| length + dataoffset > svlen)	260	poll_cb ();
144	length = svlen - dataoffset;
145	}	261	}
146	else	262	}
		263
		264	static int fork_started;
		265
		266	static void atfork_prepare (void)
		267	{
		268	pthread_mutex_lock (&frklock);
		269
		270	fork_started = started;
		271
		272	for (;;) {
		273	while (nreqs)
		274	{
		275	poll_wait ();
		276	poll_cb ();
		277	}
		278
		279	max_parallel (0);
		280
		281	pthread_mutex_lock (&reqlock);
		282
		283	if (!nreqs && !started)
		284	break;
		285
		286	pthread_mutex_unlock (&reqlock);
		287
		288	min_parallel (fork_started);
		289	}
		290
		291	pthread_mutex_lock (&reslock);
		292
		293	assert (!started);
		294	assert (!nreqs);
		295	assert (!reqs && !reqe);
		296	assert (!ress && !rese);
		297	}
		298
		299	static void atfork_parent (void)
		300	{
		301	pthread_mutex_unlock (&reslock);
		302	min_parallel (fork_started);
		303	pthread_mutex_unlock (&reqlock);
		304	pthread_mutex_unlock (&frklock);
		305	}
		306
		307	static void atfork_child (void)
		308	{
		309	reqs = reqe = 0;
		310
		311	atfork_parent ();
		312	}
		313
		314	/*****************************************************************************/
		315	/* work around various missing functions */
		316
		317	#if !HAVE_PREADWRITE
		318	# define pread aio_pread
		319	# define pwrite aio_pwrite
		320
		321	/*
		322	* make our pread/pwrite safe against themselves, but not against
		323	* normal read/write by using a mutex. slows down execution a lot,
		324	* but that's your problem, not mine.
		325	*/
		326	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
		327
		328	static ssize_t
		329	pread (int fd, void *buf, size_t count, off_t offset)
		330	{
		331	ssize_t res;
		332	off_t ooffset;
		333
		334	pthread_mutex_lock (&iolock);
		335	ooffset = lseek (fd, 0, SEEK_CUR);
		336	lseek (fd, offset, SEEK_SET);
		337	res = read (fd, buf, count);
		338	lseek (fd, ooffset, SEEK_SET);
		339	pthread_mutex_unlock (&iolock);
		340
		341	return res;
		342	}
		343
		344	static ssize_t
		345	pwrite (int fd, void *buf, size_t count, off_t offset)
		346	{
		347	ssize_t res;
		348	off_t ooffset;
		349
		350	pthread_mutex_lock (&iolock);
		351	ooffset = lseek (fd, 0, SEEK_CUR);
		352	lseek (fd, offset, SEEK_SET);
		353	res = write (fd, buf, count);
		354	lseek (fd, offset, SEEK_SET);
		355	pthread_mutex_unlock (&iolock);
		356
		357	return res;
		358	}
		359	#endif
		360
		361	#if !HAVE_FDATASYNC
		362	# define fdatasync fsync
		363	#endif
		364
		365	#if !HAVE_READAHEAD
		366	# define readahead aio_readahead
		367
		368	static char readahead_buf[4096];
		369
		370	static ssize_t
		371	readahead (int fd, off_t offset, size_t count)
		372	{
		373	while (count > 0)
147	{	374	{
148	/* read: grow scalar as necessary */	375	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
149	svptr = SvGROW (data, length + dataoffset);	376
		377	pread (fd, readahead_buf, len, offset);
		378	offset += len;
		379	count -= len;
150	}	380	}
151		381
152	if (length < 0)	382	errno = 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	}	383	}
		384	#endif
170		385
171	static void	386	/*****************************************************************************/
172	poll_wait ()
173	{
174	if (!nreqs)
175	return;
176
177	fd_set rfd;
178	FD_ZERO(&rfd);
179	FD_SET(respipe [0], &rfd);
180
181	select (respipe [0] + 1, &rfd, 0, 0, 0);
182	}
183
184	static int
185	poll_cb (pTHX)
186	{
187	dSP;
188	int count = 0;
189	aio_req req;
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
198	for (;;)
199	{
200	pthread_mutex_lock (&reslock);
201
202	req = ress;
203
204	if (ress)
205	{
206	ress = ress->next;
207	if (!ress) rese = 0;
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	}
271
272	return count;
273	}
274		387
275	static void *	388	static void *
276	aio_proc (void *thr_arg)	389	aio_proc (void *thr_arg)
277	{	390	{
278	aio_req req;	391	aio_req req;
…		…
304		417
305	type = req->type;	418	type = req->type;
306		419
307	switch (type)	420	switch (type)
308	{	421	{
309	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;	422	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;	423	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
311	#if SYS_readahead	424
312	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	425	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
313	#else
314	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
315	#endif
316		426
317	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	427	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
318	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	428	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
319	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	429	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
320		430
321	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	431	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
322	case REQ_CLOSE: req->result = close (req->fd); break;	432	case REQ_CLOSE: req->result = close (req->fd); break;
323	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	433	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
		434	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		435	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
324		436
		437	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
325	case REQ_FSYNC: req->result = fsync (req->fd); break;	438	case REQ_FSYNC: req->result = fsync (req->fd); break;
326	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
327		439
328	case REQ_QUIT:	440	case REQ_QUIT:
329	break;	441	break;
330		442
331	default:	443	default:
…		…
357	while (type != REQ_QUIT);	469	while (type != REQ_QUIT);
358		470
359	return 0;	471	return 0;
360	}	472	}
361		473
		474	#define dREQ \
		475	aio_req req; \
		476	\
		477	if (SvOK (callback) && !SvROK (callback)) \
		478	croak ("clalback must be undef or of reference type"); \
		479	\
		480	Newz (0, req, 1, aio_cb); \
		481	if (!req) \
		482	croak ("out of memory during aio_req allocation"); \
		483	\
		484	req->callback = SvREFCNT_inc (callback);
		485
362	MODULE = IO::AIO PACKAGE = IO::AIO	486	MODULE = IO::AIO PACKAGE = IO::AIO
		487
		488	PROTOTYPES: ENABLE
363		489
364	BOOT:	490	BOOT:
365	{	491	{
366	if (pipe (respipe))	492	if (pipe (respipe))
367	croak ("unable to initialize result pipe");	493	croak ("unable to initialize result pipe");
…		…
369	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	495	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
370	croak ("cannot set result pipe to nonblocking mode");	496	croak ("cannot set result pipe to nonblocking mode");
371		497
372	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	498	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
373	croak ("cannot set result pipe to nonblocking mode");	499	croak ("cannot set result pipe to nonblocking mode");
		500
		501	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
374	}	502	}
375		503
376	void	504	void
377	min_parallel(nthreads)	505	min_parallel(nthreads)
378	int nthreads	506	int nthreads
379	PROTOTYPE: $	507	PROTOTYPE: $
380	CODE:
381	while (nthreads > started)
382	start_thread ();
383		508
384	void	509	void
385	max_parallel(nthreads)	510	max_parallel(nthreads)
386	int nthreads	511	int nthreads
387	PROTOTYPE: $	512	PROTOTYPE: $
		513
		514	int
		515	max_outstanding(nreqs)
		516	int nreqs
		517	PROTOTYPE: $
388	CODE:	518	CODE:
389	{	519	RETVAL = max_outstanding;
390	int cur = started;	520	max_outstanding = nreqs;
391	while (cur > nthreads)
392	{
393	end_thread ();
394	cur--;
395	}
396		521
397	while (started > nthreads)
398	{
399	poll_wait ();
400	poll_cb (aTHX);
401	}
402	}
403
404	void	522	void
405	aio_open(pathname,flags,mode,callback)	523	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
406	SV * pathname	524	SV * pathname
407	int flags	525	int flags
408	int mode	526	int mode
409	SV * callback	527	SV * callback
410	PROTOTYPE: $$$$	528	PROTOTYPE: $$$;$
411	CODE:	529	CODE:
412	{	530	{
413	aio_req req;	531	dREQ;
414
415	Newz (0, req, 1, aio_cb);
416
417	if (!req)
418	croak ("out of memory during aio_req allocation");
419		532
420	req->type = REQ_OPEN;	533	req->type = REQ_OPEN;
421	req->data = newSVsv (pathname);	534	req->data = newSVsv (pathname);
422	req->dataptr = SvPV_nolen (req->data);	535	req->dataptr = SvPVbyte_nolen (req->data);
423	req->fd = flags;	536	req->fd = flags;
424	req->mode = mode;	537	req->mode = mode;
425	req->callback = SvREFCNT_inc (callback);
426		538
427	send_req (req);	539	send_req (req);
428	}	540	}
429		541
430	void	542	void
431	aio_close(fh,callback)	543	aio_close(fh,callback=&PL_sv_undef)
432	InputStream fh	544	SV * fh
433	SV * callback	545	SV * callback
434	PROTOTYPE: $$	546	PROTOTYPE: $;$
435	ALIAS:	547	ALIAS:
436	aio_close = REQ_CLOSE	548	aio_close = REQ_CLOSE
437	aio_fsync = REQ_FSYNC	549	aio_fsync = REQ_FSYNC
438	aio_fdatasync = REQ_FDATASYNC	550	aio_fdatasync = REQ_FDATASYNC
439	CODE:	551	CODE:
440	{	552	{
		553	dREQ;
		554
		555	req->type = ix;
		556	req->fh = newSVsv (fh);
		557	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
		558
		559	send_req (req);
		560	}
		561
		562	void
		563	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
		564	SV * fh
		565	UV offset
		566	IV length
		567	SV * data
		568	IV dataoffset
		569	SV * callback
		570	ALIAS:
		571	aio_read = REQ_READ
		572	aio_write = REQ_WRITE
		573	PROTOTYPE: $$$$$;$
		574	CODE:
		575	{
441	aio_req req;	576	aio_req req;
		577	STRLEN svlen;
		578	char *svptr = SvPVbyte (data, svlen);
442		579
443	Newz (0, req, 1, aio_cb);	580	SvUPGRADE (data, SVt_PV);
		581	SvPOK_on (data);
444		582
445	if (!req)	583	if (dataoffset < 0)
446	croak ("out of memory during aio_req allocation");	584	dataoffset += svlen;
447		585
448	req->type = ix;	586	if (dataoffset < 0 \|\| dataoffset > svlen)
449	req->fd = PerlIO_fileno (fh);	587	croak ("data offset outside of string");
450	req->callback = SvREFCNT_inc (callback);
451		588
452	send_req (req);	589	if (ix == REQ_WRITE)
453	}	590	{
454		591	/* write: check length and adjust. */
455	void	592	if (length < 0 \|\| length + dataoffset > svlen)
456	aio_read(fh,offset,length,data,dataoffset,callback)	593	length = svlen - dataoffset;
457	InputStream fh	594	}
458	UV offset	595	else
459	IV length	596	{
460	SV * data	597	/* read: grow scalar as necessary */
461	IV dataoffset	598	svptr = SvGROW (data, length + dataoffset);
462	SV * callback	599	}
463	PROTOTYPE: $$$$$$
464	CODE:
465	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
466
467	void
468	aio_write(fh,offset,length,data,dataoffset,callback)
469	OutputStream fh
470	UV offset
471	IV length
472	SV * data
473	IV dataoffset
474	SV * callback
475	PROTOTYPE: $$$$$$
476	CODE:
477	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
478
479	void
480	aio_readahead(fh,offset,length,callback)
481	InputStream fh
482	UV offset
483	IV length
484	SV * callback
485	PROTOTYPE: $$$$
486	CODE:
487	{
488	aio_req req;
489		600
490	if (length < 0)	601	if (length < 0)
491	croak ("length must not be negative");	602	croak ("length must not be negative");
492		603
493	Newz (0, req, 1, aio_cb);	604	{
		605	dREQ;
494		606
495	if (!req)	607	req->type = ix;
496	croak ("out of memory during aio_req allocation");	608	req->fh = newSVsv (fh);
		609	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
		610	: IoOFP (sv_2io (fh)));
		611	req->offset = offset;
		612	req->length = length;
		613	req->data = SvREFCNT_inc (data);
		614	req->dataptr = (char *)svptr + dataoffset;
		615	req->callback = SvREFCNT_inc (callback);
		616
		617	send_req (req);
		618	}
		619	}
		620
		621	void
		622	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
		623	SV * fh
		624	UV offset
		625	IV length
		626	SV * callback
		627	PROTOTYPE: $$$;$
		628	CODE:
		629	{
		630	dREQ;
497		631
498	req->type = REQ_READAHEAD;	632	req->type = REQ_READAHEAD;
		633	req->fh = newSVsv (fh);
499	req->fd = PerlIO_fileno (fh);	634	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
500	req->offset = offset;	635	req->offset = offset;
501	req->length = length;	636	req->length = length;
502	req->callback = SvREFCNT_inc (callback);
503		637
504	send_req (req);	638	send_req (req);
505	}	639	}
506		640
507	void	641	void
508	aio_stat(fh_or_path,callback)	642	aio_stat(fh_or_path,callback=&PL_sv_undef)
509	SV * fh_or_path	643	SV * fh_or_path
510	SV * callback	644	SV * callback
511	PROTOTYPE: $$
512	ALIAS:	645	ALIAS:
		646	aio_stat = REQ_STAT
513	aio_lstat = 1	647	aio_lstat = REQ_LSTAT
514	CODE:	648	CODE:
515	{	649	{
516	aio_req req;	650	dREQ;
517
518	Newz (0, req, 1, aio_cb);
519
520	if (!req)
521	croak ("out of memory during aio_req allocation");
522		651
523	New (0, req->statdata, 1, Stat_t);	652	New (0, req->statdata, 1, Stat_t);
524
525	if (!req->statdata)	653	if (!req->statdata)
526	croak ("out of memory during aio_req->statdata allocation");	654	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");
527		655
528	if (SvPOK (fh_or_path))	656	if (SvPOK (fh_or_path))
529	{	657	{
530	req->type = ix ? REQ_LSTAT : REQ_STAT;	658	req->type = ix;
531	req->data = newSVsv (fh_or_path);	659	req->data = newSVsv (fh_or_path);
532	req->dataptr = SvPV_nolen (req->data);	660	req->dataptr = SvPVbyte_nolen (req->data);
533	}	661	}
534	else	662	else
535	{	663	{
536	req->type = REQ_FSTAT;	664	req->type = REQ_FSTAT;
		665	req->fh = newSVsv (fh_or_path);
537	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	666	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
538	}	667	}
539		668
540	req->callback = SvREFCNT_inc (callback);
541
542	send_req (req);	669	send_req (req);
543	}	670	}
544		671
545	void	672	void
546	aio_unlink(pathname,callback)	673	aio_unlink(pathname,callback=&PL_sv_undef)
547	SV * pathname	674	SV * pathname
548	SV * callback	675	SV * callback
549	PROTOTYPE: $$	676	ALIAS:
		677	aio_unlink = REQ_UNLINK
		678	aio_rmdir = REQ_RMDIR
550	CODE:	679	CODE:
551	{	680	{
552	aio_req req;	681	dREQ;
553		682
554	Newz (0, req, 1, aio_cb);	683	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);	684	req->data = newSVsv (pathname);
561	req->dataptr = SvPV_nolen (req->data);	685	req->dataptr = SvPVbyte_nolen (req->data);
562	req->callback = SvREFCNT_inc (callback);
563		686
564	send_req (req);	687	send_req (req);
565	}	688	}
		689
		690	void
		691	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)
		692	SV * oldpath
		693	SV * newpath
		694	SV * callback
		695	CODE:
		696	{
		697	dREQ;
		698
		699	req->type = REQ_SYMLINK;
		700	req->fh = newSVsv (oldpath);
		701	req->data2ptr = SvPVbyte_nolen (req->fh);
		702	req->data = newSVsv (newpath);
		703	req->dataptr = SvPVbyte_nolen (req->data);
		704
		705	send_req (req);
		706	}
		707
		708	void
		709	flush()
		710	PROTOTYPE:
		711	CODE:
		712	while (nreqs)
		713	{
		714	poll_wait ();
		715	poll_cb ();
		716	}
		717
		718	void
		719	poll()
		720	PROTOTYPE:
		721	CODE:
		722	if (nreqs)
		723	{
		724	poll_wait ();
		725	poll_cb ();
		726	}
566		727
567	int	728	int
568	poll_fileno()	729	poll_fileno()
569	PROTOTYPE:	730	PROTOTYPE:
570	CODE:	731	CODE:
…		…
574		735
575	int	736	int
576	poll_cb(...)	737	poll_cb(...)
577	PROTOTYPE:	738	PROTOTYPE:
578	CODE:	739	CODE:
579	RETVAL = poll_cb (aTHX);	740	RETVAL = poll_cb ();
580	OUTPUT:	741	OUTPUT:
581	RETVAL	742	RETVAL
582		743
583	void	744	void
584	poll_wait()	745	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 1.22 by root, Tue Aug 16 22:22:18 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 1.22 by root, Tue Aug 16 22:22:18 2005 UTC