[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 1.27 by root, Wed Aug 17 04:47:02 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,
		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;
64	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	67	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
65		68
66	static volatile aio_req reqs, reqe; /* queue start, queue end */	69	static volatile aio_req reqs, reqe; /* queue start, queue end */
67	static volatile aio_req ress, rese; /* queue start, queue end */	70	static volatile aio_req ress, rese; /* queue start, queue end */
		71
		72	static void free_req (aio_req req)
		73	{
		74	if (req->data)
		75	SvREFCNT_dec (req->data);
		76
		77	if (req->fh)
		78	SvREFCNT_dec (req->fh);
		79
		80	if (req->statdata)
		81	Safefree (req->statdata);
		82
		83	if (req->callback)
		84	SvREFCNT_dec (req->callback);
		85
		86	Safefree (req);
		87	}
		88
		89	static void
		90	poll_wait ()
		91	{
		92	if (nreqs && !ress)
		93	{
		94	fd_set rfd;
		95	FD_ZERO(&rfd);
		96	FD_SET(respipe [0], &rfd);
		97
		98	select (respipe [0] + 1, &rfd, 0, 0, 0);
		99	}
		100	}
		101
		102	static int
		103	poll_cb ()
		104	{
		105	dSP;
		106	int count = 0;
		107	int do_croak = 0;
		108	aio_req req;
		109
		110	for (;;)
		111	{
		112	pthread_mutex_lock (&reslock);
		113	req = ress;
		114
		115	if (req)
		116	{
		117	ress = req->next;
		118
		119	if (!ress)
		120	{
		121	rese = 0;
		122
		123	/* read any signals sent by the worker threads */
		124	char buf [32];
		125	while (read (respipe [0], buf, 32) == 32)
		126	;
		127	}
		128	}
		129
		130	pthread_mutex_unlock (&reslock);
		131
		132	if (!req)
		133	break;
		134
		135	nreqs--;
		136
		137	if (req->type == REQ_QUIT)
		138	started--;
		139	else
		140	{
		141	int errorno = errno;
		142	errno = req->errorno;
		143
		144	if (req->type == REQ_READ)
		145	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		146
		147	if (req->statdata)
		148	{
		149	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		150	PL_laststatval = req->result;
		151	PL_statcache = *(req->statdata);
		152	}
		153
		154	ENTER;
		155	PUSHMARK (SP);
		156	XPUSHs (sv_2mortal (newSViv (req->result)));
		157
		158	if (req->type == REQ_OPEN)
		159	{
		160	/* convert fd to fh */
		161	SV *fh;
		162
		163	PUTBACK;
		164	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		165	SPAGAIN;
		166
		167	fh = SvREFCNT_inc (POPs);
		168
		169	PUSHMARK (SP);
		170	XPUSHs (sv_2mortal (fh));
		171	}
		172
		173	if (SvOK (req->callback))
		174	{
		175	PUTBACK;
		176	call_sv (req->callback, G_VOID \| G_EVAL);
		177	SPAGAIN;
		178
		179	if (SvTRUE (ERRSV))
		180	{
		181	free_req (req);
		182	croak (0);
		183	}
		184	}
		185
		186	LEAVE;
		187
		188	errno = errorno;
		189	count++;
		190	}
		191
		192	free_req (req);
		193	}
		194
		195	return count;
		196	}
68		197
69	static void aio_proc(void arg);	198	static void aio_proc(void arg);
70		199
71	static void	200	static void
72	start_thread (void)	201	start_thread (void)
…		…
105	else	234	else
106	reqe = reqs = req;	235	reqe = reqs = req;
107		236
108	pthread_cond_signal (&reqwait);	237	pthread_cond_signal (&reqwait);
109	pthread_mutex_unlock (&reqlock);	238	pthread_mutex_unlock (&reqlock);
		239
		240	if (nreqs > max_outstanding)
		241	for (;;)
		242	{
		243	poll_cb ();
		244
		245	if (nreqs <= max_outstanding)
		246	break;
		247
		248	poll_wait ();
		249	}
110	}	250	}
111		251
112	static void	252	static void
113	end_thread (void)	253	end_thread (void)
114	{	254	{
115	aio_req req;	255	aio_req req;
116	New (0, req, 1, aio_cb);	256	Newz (0, req, 1, aio_cb);
117	req->type = REQ_QUIT;	257	req->type = REQ_QUIT;
118		258
119	send_req (req);	259	send_req (req);
120	}	260	}
121		261
122	static void	262	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	{	263	{
127	aio_req req;	264	while (nthreads > started)
128	STRLEN svlen;	265	start_thread ();
129	char *svptr = SvPV (data, svlen);	266	}
130		267
131	SvUPGRADE (data, SVt_PV);	268	static void max_parallel (int nthreads)
132	SvPOK_on (data);	269	{
		270	int cur = started;
133		271
134	if (dataoffset < 0)	272	while (cur > nthreads)
135	dataoffset += svlen;	273	{
		274	end_thread ();
		275	cur--;
		276	}
136		277
137	if (dataoffset < 0 \|\| dataoffset > svlen)	278	while (started > nthreads)
138	croak ("data offset outside of string");
139
140	if (dowrite)
141	{	279	{
142	/* write: check length and adjust. */	280	poll_wait ();
143	if (length < 0 \|\| length + dataoffset > svlen)	281	poll_cb ();
144	length = svlen - dataoffset;
145	}	282	}
146	else	283	}
		284
		285	static void create_pipe ()
		286	{
		287	if (pipe (respipe))
		288	croak ("unable to initialize result pipe");
		289
		290	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
		291	croak ("cannot set result pipe to nonblocking mode");
		292
		293	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		294	croak ("cannot set result pipe to nonblocking mode");
		295	}
		296
		297	static void atfork_prepare (void)
		298	{
		299	for (;;) {
		300
		301	for (;;)
		302	{
		303	poll_cb ();
		304
		305	if (!nreqs)
		306	break;
		307
		308	poll_wait ();
		309	}
		310
		311	pthread_mutex_lock (&reqlock);
		312
		313	if (!nreqs)
		314	break;
		315
		316	pthread_mutex_unlock (&reqlock);
		317	}
		318
		319	pthread_mutex_lock (&reslock);
		320
		321	assert (!nreqs && !reqs && !ress);
		322	}
		323
		324	static void atfork_parent (void)
		325	{
		326	pthread_mutex_unlock (&reslock);
		327	pthread_mutex_unlock (&reqlock);
		328	}
		329
		330	static void atfork_child (void)
		331	{
		332	int restart = started;
		333	started = 0;
		334
		335	atfork_parent ();
		336
		337	min_parallel (restart);
		338	}
		339
		340	/*****************************************************************************/
		341	/* work around various missing functions */
		342
		343	#if !HAVE_PREADWRITE
		344	# define pread aio_pread
		345	# define pwrite aio_pwrite
		346
		347	/*
		348	* make our pread/pwrite safe against themselves, but not against
		349	* normal read/write by using a mutex. slows down execution a lot,
		350	* but that's your problem, not mine.
		351	*/
		352	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
		353
		354	static ssize_t
		355	pread (int fd, void *buf, size_t count, off_t offset)
		356	{
		357	ssize_t res;
		358	off_t ooffset;
		359
		360	pthread_mutex_lock (&iolock);
		361	ooffset = lseek (fd, 0, SEEK_CUR);
		362	lseek (fd, offset, SEEK_SET);
		363	res = read (fd, buf, count);
		364	lseek (fd, ooffset, SEEK_SET);
		365	pthread_mutex_unlock (&iolock);
		366
		367	return res;
		368	}
		369
		370	static ssize_t
		371	pwrite (int fd, void *buf, size_t count, off_t offset)
		372	{
		373	ssize_t res;
		374	off_t ooffset;
		375
		376	pthread_mutex_lock (&iolock);
		377	ooffset = lseek (fd, 0, SEEK_CUR);
		378	lseek (fd, offset, SEEK_SET);
		379	res = write (fd, buf, count);
		380	lseek (fd, offset, SEEK_SET);
		381	pthread_mutex_unlock (&iolock);
		382
		383	return res;
		384	}
		385	#endif
		386
		387	#if !HAVE_FDATASYNC
		388	# define fdatasync fsync
		389	#endif
		390
		391	#if !HAVE_READAHEAD
		392	# define readahead aio_readahead
		393
		394	static char readahead_buf[4096];
		395
		396	static ssize_t
		397	readahead (int fd, off_t offset, size_t count)
		398	{
		399	while (count > 0)
147	{	400	{
148	/* read: grow scalar as necessary */	401	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
149	svptr = SvGROW (data, length + dataoffset);	402
		403	pread (fd, readahead_buf, len, offset);
		404	offset += len;
		405	count -= len;
150	}	406	}
151		407
152	if (length < 0)	408	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	}	409	}
		410	#endif
170		411
171	static void	412	/*****************************************************************************/
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		413
275	static void *	414	static void *
276	aio_proc (void *thr_arg)	415	aio_proc (void *thr_arg)
277	{	416	{
278	aio_req req;	417	aio_req req;
…		…
304		443
305	type = req->type;	444	type = req->type;
306		445
307	switch (type)	446	switch (type)
308	{	447	{
309	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;	448	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;	449	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
311	#if SYS_readahead	450
312	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	451	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		452
317	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	453	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
318	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	454	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
319	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	455	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
320		456
321	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	457	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
322	case REQ_CLOSE: req->result = close (req->fd); break;	458	case REQ_CLOSE: req->result = close (req->fd); break;
323	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	459	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
		460	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		461	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
324		462
		463	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
325	case REQ_FSYNC: req->result = fsync (req->fd); break;	464	case REQ_FSYNC: req->result = fsync (req->fd); break;
326	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
327		465
328	case REQ_QUIT:	466	case REQ_QUIT:
329	break;	467	break;
330		468
331	default:	469	default:
…		…
357	while (type != REQ_QUIT);	495	while (type != REQ_QUIT);
358		496
359	return 0;	497	return 0;
360	}	498	}
361		499
		500	#define dREQ \
		501	aio_req req; \
		502	\
		503	if (SvOK (callback) && !SvROK (callback)) \
		504	croak ("clalback must be undef or of reference type"); \
		505	\
		506	Newz (0, req, 1, aio_cb); \
		507	if (!req) \
		508	croak ("out of memory during aio_req allocation"); \
		509	\
		510	req->callback = newSVsv (callback);
		511
362	MODULE = IO::AIO PACKAGE = IO::AIO	512	MODULE = IO::AIO PACKAGE = IO::AIO
363		513
		514	PROTOTYPES: ENABLE
		515
364	BOOT:	516	BOOT:
365	{	517	{
366	if (pipe (respipe))	518	create_pipe ();
367	croak ("unable to initialize result pipe");	519	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	}	520	}
375		521
376	void	522	void
377	min_parallel(nthreads)	523	min_parallel(nthreads)
378	int nthreads	524	int nthreads
379	PROTOTYPE: $	525	PROTOTYPE: $
380	CODE:
381	while (nthreads > started)
382	start_thread ();
383		526
384	void	527	void
385	max_parallel(nthreads)	528	max_parallel(nthreads)
386	int nthreads	529	int nthreads
387	PROTOTYPE: $	530	PROTOTYPE: $
		531
		532	int
		533	max_outstanding(nreqs)
		534	int nreqs
		535	PROTOTYPE: $
388	CODE:	536	CODE:
389	{	537	RETVAL = max_outstanding;
390	int cur = started;	538	max_outstanding = nreqs;
391	while (cur > nthreads)
392	{
393	end_thread ();
394	cur--;
395	}
396		539
397	while (started > nthreads)
398	{
399	poll_wait ();
400	poll_cb (aTHX);
401	}
402	}
403
404	void	540	void
405	aio_open(pathname,flags,mode,callback)	541	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
406	SV * pathname	542	SV * pathname
407	int flags	543	int flags
408	int mode	544	int mode
409	SV * callback	545	SV * callback
410	PROTOTYPE: $$$$	546	PROTOTYPE: $$$;$
411	CODE:	547	CODE:
412	{	548	{
413	aio_req req;	549	dREQ;
414
415	Newz (0, req, 1, aio_cb);
416
417	if (!req)
418	croak ("out of memory during aio_req allocation");
419		550
420	req->type = REQ_OPEN;	551	req->type = REQ_OPEN;
421	req->data = newSVsv (pathname);	552	req->data = newSVsv (pathname);
422	req->dataptr = SvPV_nolen (req->data);	553	req->dataptr = SvPVbyte_nolen (req->data);
423	req->fd = flags;	554	req->fd = flags;
424	req->mode = mode;	555	req->mode = mode;
425	req->callback = SvREFCNT_inc (callback);
426		556
427	send_req (req);	557	send_req (req);
428	}	558	}
429		559
430	void	560	void
431	aio_close(fh,callback)	561	aio_close(fh,callback=&PL_sv_undef)
432	InputStream fh	562	SV * fh
433	SV * callback	563	SV * callback
434	PROTOTYPE: $$	564	PROTOTYPE: $;$
435	ALIAS:	565	ALIAS:
436	aio_close = REQ_CLOSE	566	aio_close = REQ_CLOSE
437	aio_fsync = REQ_FSYNC	567	aio_fsync = REQ_FSYNC
438	aio_fdatasync = REQ_FDATASYNC	568	aio_fdatasync = REQ_FDATASYNC
439	CODE:	569	CODE:
440	{	570	{
		571	dREQ;
		572
		573	req->type = ix;
		574	req->fh = newSVsv (fh);
		575	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
		576
		577	send_req (req);
		578	}
		579
		580	void
		581	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
		582	SV * fh
		583	UV offset
		584	IV length
		585	SV * data
		586	IV dataoffset
		587	SV * callback
		588	ALIAS:
		589	aio_read = REQ_READ
		590	aio_write = REQ_WRITE
		591	PROTOTYPE: $$$$$;$
		592	CODE:
		593	{
441	aio_req req;	594	aio_req req;
		595	STRLEN svlen;
		596	char *svptr = SvPVbyte (data, svlen);
442		597
443	Newz (0, req, 1, aio_cb);	598	SvUPGRADE (data, SVt_PV);
		599	SvPOK_on (data);
444		600
445	if (!req)	601	if (dataoffset < 0)
446	croak ("out of memory during aio_req allocation");	602	dataoffset += svlen;
447		603
448	req->type = ix;	604	if (dataoffset < 0 \|\| dataoffset > svlen)
449	req->fd = PerlIO_fileno (fh);	605	croak ("data offset outside of string");
450	req->callback = SvREFCNT_inc (callback);
451		606
452	send_req (req);	607	if (ix == REQ_WRITE)
453	}	608	{
454		609	/* write: check length and adjust. */
455	void	610	if (length < 0 \|\| length + dataoffset > svlen)
456	aio_read(fh,offset,length,data,dataoffset,callback)	611	length = svlen - dataoffset;
457	InputStream fh	612	}
458	UV offset	613	else
459	IV length	614	{
460	SV * data	615	/* read: grow scalar as necessary */
461	IV dataoffset	616	svptr = SvGROW (data, length + dataoffset);
462	SV * callback	617	}
463	PROTOTYPE: $$$$$$
464	CODE:
465	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
466
467	void
468	aio_write(fh,offset,length,data,dataoffset,callback)
469	OutputStream fh
470	UV offset
471	IV length
472	SV * data
473	IV dataoffset
474	SV * callback
475	PROTOTYPE: $$$$$$
476	CODE:
477	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
478
479	void
480	aio_readahead(fh,offset,length,callback)
481	InputStream fh
482	UV offset
483	IV length
484	SV * callback
485	PROTOTYPE: $$$$
486	CODE:
487	{
488	aio_req req;
489		618
490	if (length < 0)	619	if (length < 0)
491	croak ("length must not be negative");	620	croak ("length must not be negative");
492		621
493	Newz (0, req, 1, aio_cb);	622	{
		623	dREQ;
494		624
495	if (!req)	625	req->type = ix;
496	croak ("out of memory during aio_req allocation");	626	req->fh = newSVsv (fh);
		627	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
		628	: IoOFP (sv_2io (fh)));
		629	req->offset = offset;
		630	req->length = length;
		631	req->data = SvREFCNT_inc (data);
		632	req->dataptr = (char *)svptr + dataoffset;
		633
		634	send_req (req);
		635	}
		636	}
		637
		638	void
		639	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
		640	SV * fh
		641	UV offset
		642	IV length
		643	SV * callback
		644	PROTOTYPE: $$$;$
		645	CODE:
		646	{
		647	dREQ;
497		648
498	req->type = REQ_READAHEAD;	649	req->type = REQ_READAHEAD;
		650	req->fh = newSVsv (fh);
499	req->fd = PerlIO_fileno (fh);	651	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
500	req->offset = offset;	652	req->offset = offset;
501	req->length = length;	653	req->length = length;
502	req->callback = SvREFCNT_inc (callback);
503		654
504	send_req (req);	655	send_req (req);
505	}	656	}
506		657
507	void	658	void
508	aio_stat(fh_or_path,callback)	659	aio_stat(fh_or_path,callback=&PL_sv_undef)
509	SV * fh_or_path	660	SV * fh_or_path
510	SV * callback	661	SV * callback
511	PROTOTYPE: $$
512	ALIAS:	662	ALIAS:
		663	aio_stat = REQ_STAT
513	aio_lstat = 1	664	aio_lstat = REQ_LSTAT
514	CODE:	665	CODE:
515	{	666	{
516	aio_req req;	667	dREQ;
517
518	Newz (0, req, 1, aio_cb);
519
520	if (!req)
521	croak ("out of memory during aio_req allocation");
522		668
523	New (0, req->statdata, 1, Stat_t);	669	New (0, req->statdata, 1, Stat_t);
524
525	if (!req->statdata)	670	if (!req->statdata)
		671	{
		672	free_req (req);
526	croak ("out of memory during aio_req->statdata allocation");	673	croak ("out of memory during aio_req->statdata allocation");
		674	}
527		675
528	if (SvPOK (fh_or_path))	676	if (SvPOK (fh_or_path))
529	{	677	{
530	req->type = ix ? REQ_LSTAT : REQ_STAT;	678	req->type = ix;
531	req->data = newSVsv (fh_or_path);	679	req->data = newSVsv (fh_or_path);
532	req->dataptr = SvPV_nolen (req->data);	680	req->dataptr = SvPVbyte_nolen (req->data);
533	}	681	}
534	else	682	else
535	{	683	{
536	req->type = REQ_FSTAT;	684	req->type = REQ_FSTAT;
		685	req->fh = newSVsv (fh_or_path);
537	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	686	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
538	}	687	}
539		688
540	req->callback = SvREFCNT_inc (callback);
541
542	send_req (req);	689	send_req (req);
543	}	690	}
544		691
545	void	692	void
546	aio_unlink(pathname,callback)	693	aio_unlink(pathname,callback=&PL_sv_undef)
547	SV * pathname	694	SV * pathname
548	SV * callback	695	SV * callback
549	PROTOTYPE: $$	696	ALIAS:
		697	aio_unlink = REQ_UNLINK
		698	aio_rmdir = REQ_RMDIR
550	CODE:	699	CODE:
551	{	700	{
552	aio_req req;	701	dREQ;
553		702
554	Newz (0, req, 1, aio_cb);	703	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);	704	req->data = newSVsv (pathname);
561	req->dataptr = SvPV_nolen (req->data);	705	req->dataptr = SvPVbyte_nolen (req->data);
562	req->callback = SvREFCNT_inc (callback);
563		706
564	send_req (req);	707	send_req (req);
565	}	708	}
		709
		710	void
		711	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)
		712	SV * oldpath
		713	SV * newpath
		714	SV * callback
		715	CODE:
		716	{
		717	dREQ;
		718
		719	req->type = REQ_SYMLINK;
		720	req->fh = newSVsv (oldpath);
		721	req->data2ptr = SvPVbyte_nolen (req->fh);
		722	req->data = newSVsv (newpath);
		723	req->dataptr = SvPVbyte_nolen (req->data);
		724
		725	send_req (req);
		726	}
		727
		728	void
		729	flush()
		730	PROTOTYPE:
		731	CODE:
		732	while (nreqs)
		733	{
		734	poll_wait ();
		735	poll_cb ();
		736	}
		737
		738	void
		739	poll()
		740	PROTOTYPE:
		741	CODE:
		742	if (nreqs)
		743	{
		744	poll_wait ();
		745	poll_cb ();
		746	}
566		747
567	int	748	int
568	poll_fileno()	749	poll_fileno()
569	PROTOTYPE:	750	PROTOTYPE:
570	CODE:	751	CODE:
…		…
574		755
575	int	756	int
576	poll_cb(...)	757	poll_cb(...)
577	PROTOTYPE:	758	PROTOTYPE:
578	CODE:	759	CODE:
579	RETVAL = poll_cb (aTHX);	760	RETVAL = poll_cb ();
580	OUTPUT:	761	OUTPUT:
581	RETVAL	762	RETVAL
582		763
583	void	764	void
584	poll_wait()	765	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 1.27 by root, Wed Aug 17 04:47:02 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 1.27 by root, Wed Aug 17 04:47:02 2005 UTC