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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.27 by root, Wed Aug 17 04:47:02 2005 UTC vs.
Revision 1.50 by root, Sun Oct 22 21:13:47 2006 UTC

…		…
5	#include "perl.h"	5	#include "perl.h"
6	#include "XSUB.h"	6	#include "XSUB.h"
7		7
8	#include "autoconf/config.h"	8	#include "autoconf/config.h"
9		9
		10	#include <pthread.h>
		11
		12	#include <stddef.h>
		13	#include <errno.h>
		14	#include <sys/time.h>
		15	#include <sys/select.h>
10	#include <sys/types.h>	16	#include <sys/types.h>
11	#include <sys/stat.h>	17	#include <sys/stat.h>
12		18	#include <limits.h>
13	#include <unistd.h>	19	#include <unistd.h>
14	#include <fcntl.h>	20	#include <fcntl.h>
15	#include <signal.h>	21	#include <signal.h>
16	#include <sched.h>	22	#include <sched.h>
17		23
18	#include <pthread.h>	24	#if HAVE_SENDFILE
		25	# if __linux
		26	# include <sys/sendfile.h>
		27	# elif __freebsd
		28	# include <sys/socket.h>
		29	# include <sys/uio.h>
		30	# elif __hpux
		31	# include <sys/socket.h>
		32	# elif __solaris /* not yet */
		33	# include <sys/sendfile.h>
		34	# else
		35	# error sendfile support requested but not available
		36	# endif
		37	#endif
19		38
20	typedef void InputStream; / hack, but 5.6.1 is simply toooo old ;) */	39	/* used for struct dirent, AIX doesn't provide it */
21	typedef void OutputStream; / hack, but 5.6.1 is simply toooo old ;) */	40	#ifndef NAME_MAX
22	typedef void InOutStream; / hack, but 5.6.1 is simply toooo old ;) */	41	# define NAME_MAX 4096
		42	#endif
23		43
24	#if __ia64	44	#if __ia64
25	# define STACKSIZE 65536	45	# define STACKSIZE 65536
26	#else	46	#else
27	# define STACKSIZE 4096	47	# define STACKSIZE 8192
28	#endif	48	#endif
29		49
30	enum {	50	enum {
31	REQ_QUIT,	51	REQ_QUIT,
32	REQ_OPEN, REQ_CLOSE,	52	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,	53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		54	REQ_SENDFILE,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,	56	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,	57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
37	REQ_SYMLINK,	58	REQ_READDIR,
		59	REQ_LINK, REQ_SYMLINK,
		60	REQ_SLEEP,
		61	REQ_GROUP,
38	};	62	};
39		63
		64	#define AIO_REQ_KLASS "IO::AIO::REQ"
		65	#define AIO_GRP_KLASS "IO::AIO::GRP"
		66
40	typedef struct aio_cb {	67	typedef struct aio_cb
		68	{
41	struct aio_cb *volatile next;	69	struct aio_cb *volatile next;
42		70
43	int type;	71	struct aio_cb grp, grp_prev, grp_next, grp_first;
44		72
45	int fd;	73	SV self; / the perl counterpart of this request, if any */
		74
		75	SV data, callback;
		76	SV fh, fh2;
		77	void dataptr, data2ptr;
		78	Stat_t *statdata;
46	off_t offset;	79	off_t offset;
47	size_t length;	80	size_t length;
48	ssize_t result;	81	ssize_t result;
		82
		83	int type;
		84	int fd, fd2;
		85	int errorno;
		86	STRLEN dataoffset;
49	mode_t mode; /* open */	87	mode_t mode; /* open */
50	int errorno;	88	unsigned char cancelled;
51	SV data, callback, *fh;
52	void dataptr, data2ptr;
53	STRLEN dataoffset;
54
55	Stat_t *statdata;
56	} aio_cb;	89	} aio_cb;
57		90
58	typedef aio_cb *aio_req;	91	typedef aio_cb *aio_req;
		92	typedef aio_cb *aio_req_ornot;
59		93
60	static int started;	94	static int started, wanted;
61	static volatile int nreqs;	95	static volatile int nreqs;
62	static int max_outstanding = 1<<30;	96	static int max_outstanding = 1<<30;
63	static int respipe [2];	97	static int respipe [2];
64		98
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
…		…
67	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68		102
69	static volatile aio_req reqs, reqe; /* queue start, queue end */	103	static volatile aio_req reqs, reqe; /* queue start, queue end */
70	static volatile aio_req ress, rese; /* queue start, queue end */	104	static volatile aio_req ress, rese; /* queue start, queue end */
71		105
		106	static void req_invoke (aio_req req);
72	static void free_req (aio_req req)	107	static void req_free (aio_req req);
73	{
74	if (req->data)
75	SvREFCNT_dec (req->data);
76		108
		109	/* must be called at most once */
		110	static SV req_sv (aio_req req, const char klass)
		111	{
77	if (req->fh)	112	if (!req->self)
		113	{
		114	req->self = (SV *)newHV ();
		115	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		116	}
		117
		118	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		119	}
		120
		121	static aio_req SvAIO_REQ (SV *sv)
		122	{
		123	if (!sv_derived_from (sv, AIO_REQ_KLASS) \|\| !SvROK (sv))
		124	croak ("object of class " AIO_REQ_KLASS " expected");
		125
		126	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		127
		128	return mg ? (aio_req)mg->mg_ptr : 0;
		129	}
		130
		131	static void aio_grp_feed (aio_req grp)
		132	{
		133	while (grp->length < grp->fd2)
		134	{
		135	int old_len = grp->length;
		136
		137	if (grp->fh2 && SvOK (grp->fh2))
		138	{
		139	dSP;
		140
		141	ENTER;
		142	SAVETMPS;
		143	PUSHMARK (SP);
		144	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		145	PUTBACK;
		146	call_sv (grp->fh2, G_VOID \| G_EVAL);
		147	SPAGAIN;
		148	FREETMPS;
		149	LEAVE;
		150	}
		151
		152	/* stop if no progress has been made */
		153	if (old_len == grp->length)
		154	{
78	SvREFCNT_dec (req->fh);	155	SvREFCNT_dec (grp->fh2);
79		156	grp->fh2 = 0;
80	if (req->statdata)	157	break;
81	Safefree (req->statdata);	158	}
82		159	}
83	if (req->callback)
84	SvREFCNT_dec (req->callback);
85
86	Safefree (req);
87	}	160	}
88		161
89	static void	162	static void aio_grp_dec (aio_req grp)
90	poll_wait ()	163	{
		164	--grp->length;
		165
		166	/* call feeder, if applicable */
		167	aio_grp_feed (grp);
		168
		169	/* finish, if done */
		170	if (!grp->length && grp->fd)
		171	{
		172	req_invoke (grp);
		173	req_free (grp);
		174	}
		175	}
		176
		177	static void poll_wait ()
91	{	178	{
92	if (nreqs && !ress)	179	if (nreqs && !ress)
93	{	180	{
94	fd_set rfd;	181	fd_set rfd;
95	FD_ZERO(&rfd);	182	FD_ZERO(&rfd);
…		…
97		184
98	select (respipe [0] + 1, &rfd, 0, 0, 0);	185	select (respipe [0] + 1, &rfd, 0, 0, 0);
99	}	186	}
100	}	187	}
101		188
102	static int	189	static void req_invoke (aio_req req)
103	poll_cb ()	190	{
		191	dSP;
		192	int errorno = errno;
		193
		194	if (req->cancelled \|\| !SvOK (req->callback))
		195	return;
		196
		197	errno = req->errorno;
		198
		199	ENTER;
		200	SAVETMPS;
		201	PUSHMARK (SP);
		202	EXTEND (SP, 1);
		203
		204	switch (req->type)
		205	{
		206	case REQ_READDIR:
		207	{
		208	SV *rv = &PL_sv_undef;
		209
		210	if (req->result >= 0)
		211	{
		212	char *buf = req->data2ptr;
		213	AV *av = newAV ();
		214
		215	while (req->result)
		216	{
		217	SV *sv = newSVpv (buf, 0);
		218
		219	av_push (av, sv);
		220	buf += SvCUR (sv) + 1;
		221	req->result--;
		222	}
		223
		224	rv = sv_2mortal (newRV_noinc ((SV *)av));
		225	}
		226
		227	PUSHs (rv);
		228	}
		229	break;
		230
		231	case REQ_OPEN:
		232	{
		233	/* convert fd to fh */
		234	SV *fh;
		235
		236	PUSHs (sv_2mortal (newSViv (req->result)));
		237	PUTBACK;
		238	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		239	SPAGAIN;
		240
		241	fh = SvREFCNT_inc (POPs);
		242
		243	PUSHMARK (SP);
		244	XPUSHs (sv_2mortal (fh));
		245	}
		246	break;
		247
		248	case REQ_GROUP:
		249	req->fd = 2; /* mark group as finished */
		250
		251	if (req->data)
		252	{
		253	int i;
		254	AV av = (AV )req->data;
		255
		256	EXTEND (SP, AvFILL (av) + 1);
		257	for (i = 0; i <= AvFILL (av); ++i)
		258	PUSHs (*av_fetch (av, i, 0));
		259	}
		260	break;
		261
		262	case REQ_SLEEP:
		263	break;
		264
		265	default:
		266	PUSHs (sv_2mortal (newSViv (req->result)));
		267	break;
		268	}
		269
		270
		271	PUTBACK;
		272	call_sv (req->callback, G_VOID \| G_EVAL);
		273	SPAGAIN;
		274
		275	if (SvTRUE (ERRSV))
		276	{
		277	req_free (req);
		278	croak (0);
		279	}
		280
		281	FREETMPS;
		282	LEAVE;
		283
		284	errno = errorno;
		285	}
		286
		287	static void req_free (aio_req req)
		288	{
		289	if (req->grp)
		290	{
		291	aio_req grp = req->grp;
		292
		293	/* unlink request */
		294	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		295	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		296
		297	if (grp->grp_first == req)
		298	grp->grp_first = req->grp_next;
		299
		300	aio_grp_dec (grp);
		301	}
		302
		303	if (req->self)
		304	{
		305	sv_unmagic (req->self, PERL_MAGIC_ext);
		306	SvREFCNT_dec (req->self);
		307	}
		308
		309	SvREFCNT_dec (req->data);
		310	SvREFCNT_dec (req->fh);
		311	SvREFCNT_dec (req->fh2);
		312	SvREFCNT_dec (req->callback);
		313	Safefree (req->statdata);
		314
		315	if (req->type == REQ_READDIR && req->result >= 0)
		316	free (req->data2ptr);
		317
		318	Safefree (req);
		319	}
		320
		321	static void req_cancel (aio_req req)
		322	{
		323	req->cancelled = 1;
		324
		325	if (req->type == REQ_GROUP)
		326	{
		327	aio_req sub;
		328
		329	for (sub = req->grp_first; sub; sub = sub->grp_next)
		330	req_cancel (sub);
		331	}
		332	}
		333
		334	static int poll_cb ()
104	{	335	{
105	dSP;	336	dSP;
106	int count = 0;	337	int count = 0;
107	int do_croak = 0;	338	int do_croak = 0;
108	aio_req req;	339	aio_req req;
…		…
116	{	347	{
117	ress = req->next;	348	ress = req->next;
118		349
119	if (!ress)	350	if (!ress)
120	{	351	{
121	rese = 0;
122
123	/* read any signals sent by the worker threads */	352	/* read any signals sent by the worker threads */
124	char buf [32];	353	char buf [32];
125	while (read (respipe [0], buf, 32) == 32)	354	while (read (respipe [0], buf, 32) == 32)
126	;	355	;
		356
		357	rese = 0;
127	}	358	}
128	}	359	}
129		360
130	pthread_mutex_unlock (&reslock);	361	pthread_mutex_unlock (&reslock);
131		362
132	if (!req)	363	if (!req)
133	break;	364	break;
134		365
135	nreqs--;	366	--nreqs;
136		367
137	if (req->type == REQ_QUIT)	368	if (req->type == REQ_QUIT)
138	started--;	369	started--;
		370	else if (req->type == REQ_GROUP && req->length)
		371	{
		372	req->fd = 1; /* mark request as delayed */
		373	continue;
		374	}
139	else	375	else
140	{	376	{
141	int errorno = errno;
142	errno = req->errorno;
143
144	if (req->type == REQ_READ)	377	if (req->type == REQ_READ)
145	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));	378	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		379
		380	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
		381	SvREADONLY_off (req->data);
146		382
147	if (req->statdata)	383	if (req->statdata)
148	{	384	{
149	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	385	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
150	PL_laststatval = req->result;	386	PL_laststatval = req->result;
151	PL_statcache = *(req->statdata);	387	PL_statcache = *(req->statdata);
152	}	388	}
153		389
154	ENTER;	390	req_invoke (req);
155	PUSHMARK (SP);
156	XPUSHs (sv_2mortal (newSViv (req->result)));
157		391
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++;	392	count++;
190	}	393	}
191		394
192	free_req (req);	395	req_free (req);
193	}	396	}
194		397
195	return count;	398	return count;
196	}	399	}
197		400
198	static void aio_proc(void arg);	401	static void aio_proc(void arg);
199		402
200	static void
201	start_thread (void)	403	static void start_thread (void)
202	{	404	{
203	sigset_t fullsigset, oldsigset;	405	sigset_t fullsigset, oldsigset;
204	pthread_t tid;	406	pthread_t tid;
205	pthread_attr_t attr;	407	pthread_attr_t attr;
206		408
…		…
215	started++;	417	started++;
216		418
217	sigprocmask (SIG_SETMASK, &oldsigset, 0);	419	sigprocmask (SIG_SETMASK, &oldsigset, 0);
218	}	420	}
219		421
220	static void	422	static void req_send (aio_req req)
221	send_req (aio_req req)
222	{	423	{
		424	while (started < wanted && nreqs >= started)
		425	start_thread ();
		426
223	nreqs++;	427	++nreqs;
224		428
225	pthread_mutex_lock (&reqlock);	429	pthread_mutex_lock (&reqlock);
226		430
227	req->next = 0;	431	req->next = 0;
228		432
…		…
247		451
248	poll_wait ();	452	poll_wait ();
249	}	453	}
250	}	454	}
251		455
252	static void	456	static void end_thread (void)
253	end_thread (void)
254	{	457	{
255	aio_req req;	458	aio_req req;
256	Newz (0, req, 1, aio_cb);	459	Newz (0, req, 1, aio_cb);
257	req->type = REQ_QUIT;	460	req->type = REQ_QUIT;
258		461
259	send_req (req);	462	req_send (req);
260	}	463	}
261		464
262	static void min_parallel (int nthreads)	465	static void min_parallel (int nthreads)
263	{	466	{
264	while (nthreads > started)	467	if (wanted < nthreads)
265	start_thread ();	468	wanted = nthreads;
266	}	469	}
267		470
268	static void max_parallel (int nthreads)	471	static void max_parallel (int nthreads)
269	{	472	{
270	int cur = started;	473	int cur = started;
271		474
		475	if (wanted > nthreads)
		476	wanted = nthreads;
		477
272	while (cur > nthreads)	478	while (cur > wanted)
273	{	479	{
274	end_thread ();	480	end_thread ();
275	cur--;	481	cur--;
276	}	482	}
277		483
278	while (started > nthreads)	484	while (started > wanted)
279	{	485	{
280	poll_wait ();	486	poll_wait ();
281	poll_cb ();	487	poll_cb ();
282	}	488	}
283	}	489	}
…		…
290	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	496	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
291	croak ("cannot set result pipe to nonblocking mode");	497	croak ("cannot set result pipe to nonblocking mode");
292		498
293	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	499	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
294	croak ("cannot set result pipe to nonblocking mode");	500	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	}	501	}
339		502
340	/*****************************************************************************/	503	/*****************************************************************************/
341	/* work around various missing functions */	504	/* work around various missing functions */
342		505
…		…
347	/*	510	/*
348	* make our pread/pwrite safe against themselves, but not against	511	* make our pread/pwrite safe against themselves, but not against
349	* normal read/write by using a mutex. slows down execution a lot,	512	* normal read/write by using a mutex. slows down execution a lot,
350	* but that's your problem, not mine.	513	* but that's your problem, not mine.
351	*/	514	*/
352	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	515	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
353		516
354	static ssize_t	517	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
355	pread (int fd, void *buf, size_t count, off_t offset)
356	{	518	{
357	ssize_t res;	519	ssize_t res;
358	off_t ooffset;	520	off_t ooffset;
359		521
360	pthread_mutex_lock (&iolock);	522	pthread_mutex_lock (&preadwritelock);
361	ooffset = lseek (fd, 0, SEEK_CUR);	523	ooffset = lseek (fd, 0, SEEK_CUR);
362	lseek (fd, offset, SEEK_SET);	524	lseek (fd, offset, SEEK_SET);
363	res = read (fd, buf, count);	525	res = read (fd, buf, count);
364	lseek (fd, ooffset, SEEK_SET);	526	lseek (fd, ooffset, SEEK_SET);
365	pthread_mutex_unlock (&iolock);	527	pthread_mutex_unlock (&preadwritelock);
366		528
367	return res;	529	return res;
368	}	530	}
369		531
370	static ssize_t
371	pwrite (int fd, void *buf, size_t count, off_t offset)	532	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
372	{	533	{
373	ssize_t res;	534	ssize_t res;
374	off_t ooffset;	535	off_t ooffset;
375		536
376	pthread_mutex_lock (&iolock);	537	pthread_mutex_lock (&preadwritelock);
377	ooffset = lseek (fd, 0, SEEK_CUR);	538	ooffset = lseek (fd, 0, SEEK_CUR);
378	lseek (fd, offset, SEEK_SET);	539	lseek (fd, offset, SEEK_SET);
379	res = write (fd, buf, count);	540	res = write (fd, buf, count);
380	lseek (fd, offset, SEEK_SET);	541	lseek (fd, offset, SEEK_SET);
381	pthread_mutex_unlock (&iolock);	542	pthread_mutex_unlock (&preadwritelock);
382		543
383	return res;	544	return res;
384	}	545	}
385	#endif	546	#endif
386		547
…		…
389	#endif	550	#endif
390		551
391	#if !HAVE_READAHEAD	552	#if !HAVE_READAHEAD
392	# define readahead aio_readahead	553	# define readahead aio_readahead
393		554
		555	static ssize_t readahead (int fd, off_t offset, size_t count)
		556	{
394	static char readahead_buf[4096];	557	char readahead_buf[4096];
395		558
396	static ssize_t
397	readahead (int fd, off_t offset, size_t count)
398	{
399	while (count > 0)	559	while (count > 0)
400	{	560	{
401	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	561	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
402		562
403	pread (fd, readahead_buf, len, offset);	563	pread (fd, readahead_buf, len, offset);
…		…
407		567
408	errno = 0;	568	errno = 0;
409	}	569	}
410	#endif	570	#endif
411		571
		572	#if !HAVE_READDIR_R
		573	# define readdir_r aio_readdir_r
		574
		575	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		576
		577	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
		578	{
		579	struct dirent *e;
		580	int errorno;
		581
		582	pthread_mutex_lock (&readdirlock);
		583
		584	e = readdir (dirp);
		585	errorno = errno;
		586
		587	if (e)
		588	{
		589	*res = ent;
		590	strcpy (ent->d_name, e->d_name);
		591	}
		592	else
		593	*res = 0;
		594
		595	pthread_mutex_unlock (&readdirlock);
		596
		597	errno = errorno;
		598	return e ? 0 : -1;
		599	}
		600	#endif
		601
		602	/* sendfile always needs emulation */
		603	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
		604	{
		605	ssize_t res;
		606
		607	if (!count)
		608	return 0;
		609
		610	#if HAVE_SENDFILE
		611	# if __linux
		612	res = sendfile (ofd, ifd, &offset, count);
		613
		614	# elif __freebsd
		615	/*
		616	* Of course, the freebsd sendfile is a dire hack with no thoughts
		617	* wasted on making it similar to other I/O functions.
		618	*/
		619	{
		620	off_t sbytes;
		621	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		622
		623	if (res < 0 && sbytes)
		624	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
		625	res = sbytes;
		626	}
		627
		628	# elif __hpux
		629	res = sendfile (ofd, ifd, offset, count, 0, 0);
		630
		631	# elif __solaris
		632	{
		633	struct sendfilevec vec;
		634	size_t sbytes;
		635
		636	vec.sfv_fd = ifd;
		637	vec.sfv_flag = 0;
		638	vec.sfv_off = offset;
		639	vec.sfv_len = count;
		640
		641	res = sendfilev (ofd, &vec, 1, &sbytes);
		642
		643	if (res < 0 && sbytes)
		644	res = sbytes;
		645	}
		646
		647	# endif
		648	#else
		649	res = -1;
		650	errno = ENOSYS;
		651	#endif
		652
		653	if (res < 0
		654	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK
		655	#if __solaris
		656	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE
		657	#endif
		658	)
		659	)
		660	{
		661	/* emulate sendfile. this is a major pain in the ass */
		662	char buf[4096];
		663	res = 0;
		664
		665	while (count)
		666	{
		667	ssize_t cnt;
		668
		669	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
		670
		671	if (cnt <= 0)
		672	{
		673	if (cnt && !res) res = -1;
		674	break;
		675	}
		676
		677	cnt = write (ofd, buf, cnt);
		678
		679	if (cnt <= 0)
		680	{
		681	if (cnt && !res) res = -1;
		682	break;
		683	}
		684
		685	offset += cnt;
		686	res += cnt;
		687	count -= cnt;
		688	}
		689	}
		690
		691	return res;
		692	}
		693
		694	/* read a full directory */
		695	static int scandir_ (const char path, void *namesp)
		696	{
		697	DIR *dirp = opendir (path);
		698	union
		699	{
		700	struct dirent d;
		701	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		702	} u;
		703	struct dirent *entp;
		704	char name, names;
		705	int memlen = 4096;
		706	int memofs = 0;
		707	int res = 0;
		708	int errorno;
		709
		710	if (!dirp)
		711	return -1;
		712
		713	names = malloc (memlen);
		714
		715	for (;;)
		716	{
		717	errno = 0, readdir_r (dirp, &u.d, &entp);
		718
		719	if (!entp)
		720	break;
		721
		722	name = entp->d_name;
		723
		724	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
		725	{
		726	int len = strlen (name) + 1;
		727
		728	res++;
		729
		730	while (memofs + len > memlen)
		731	{
		732	memlen *= 2;
		733	names = realloc (names, memlen);
		734	if (!names)
		735	break;
		736	}
		737
		738	memcpy (names + memofs, name, len);
		739	memofs += len;
		740	}
		741	}
		742
		743	errorno = errno;
		744	closedir (dirp);
		745
		746	if (errorno)
		747	{
		748	free (names);
		749	errno = errorno;
		750	res = -1;
		751	}
		752
		753	namesp = (void )names;
		754	return res;
		755	}
		756
412	/*****************************************************************************/	757	/*****************************************************************************/
413		758
414	static void *
415	aio_proc (void *thr_arg)	759	static void aio_proc (void thr_arg)
416	{	760	{
417	aio_req req;	761	aio_req req;
418	int type;	762	int type;
419		763
420	do	764	do
…		…
439		783
440	pthread_mutex_unlock (&reqlock);	784	pthread_mutex_unlock (&reqlock);
441		785
442	errno = 0; /* strictly unnecessary */	786	errno = 0; /* strictly unnecessary */
443		787
444	type = req->type;	788	if (!req->cancelled)
445		789	switch (type = req->type) /* remember type for QUIT check */
446	switch (type)
447	{	790	{
448	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	791	case REQ_READ: req->result = pread (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;	792	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
450		793
451	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	794	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
		795	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
452		796
453	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	797	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
454	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	798	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
455	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	799	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
456		800
457	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	801	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
458	case REQ_CLOSE: req->result = close (req->fd); break;	802	case REQ_CLOSE: req->result = close (req->fd); break;
459	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	803	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
460	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	804	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		805	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		806	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
461	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	807	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
462		808
463	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	809	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
464	case REQ_FSYNC: req->result = fsync (req->fd); break;	810	case REQ_FSYNC: req->result = fsync (req->fd); break;
		811	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
465		812
		813	case REQ_SLEEP:
		814	{
		815	struct timeval tv;
		816
		817	tv.tv_sec = req->fd;
		818	tv.tv_usec = req->fd2;
		819
		820	req->result = select (0, 0, 0, 0, &tv);
		821	}
		822
466	case REQ_QUIT:	823	case REQ_QUIT:
467	break;	824	break;
468		825
469	default:	826	default:
470	req->result = ENOSYS;	827	req->result = ENOSYS;
471	break;	828	break;
472	}	829	}
473		830
474	req->errorno = errno;	831	req->errorno = errno;
475		832
476	pthread_mutex_lock (&reslock);	833	pthread_mutex_lock (&reslock);
477		834
…		…
495	while (type != REQ_QUIT);	852	while (type != REQ_QUIT);
496		853
497	return 0;	854	return 0;
498	}	855	}
499		856
		857	/*****************************************************************************/
		858
		859	static void atfork_prepare (void)
		860	{
		861	pthread_mutex_lock (&reqlock);
		862	pthread_mutex_lock (&reslock);
		863	#if !HAVE_PREADWRITE
		864	pthread_mutex_lock (&preadwritelock);
		865	#endif
		866	#if !HAVE_READDIR_R
		867	pthread_mutex_lock (&readdirlock);
		868	#endif
		869	}
		870
		871	static void atfork_parent (void)
		872	{
		873	#if !HAVE_READDIR_R
		874	pthread_mutex_unlock (&readdirlock);
		875	#endif
		876	#if !HAVE_PREADWRITE
		877	pthread_mutex_unlock (&preadwritelock);
		878	#endif
		879	pthread_mutex_unlock (&reslock);
		880	pthread_mutex_unlock (&reqlock);
		881	}
		882
		883	static void atfork_child (void)
		884	{
		885	aio_req prv;
		886
		887	started = 0;
		888
		889	while (reqs)
		890	{
		891	prv = reqs;
		892	reqs = prv->next;
		893	req_free (prv);
		894	}
		895
		896	reqs = reqe = 0;
		897
		898	while (ress)
		899	{
		900	prv = ress;
		901	ress = prv->next;
		902	req_free (prv);
		903	}
		904
		905	ress = rese = 0;
		906
		907	close (respipe [0]);
		908	close (respipe [1]);
		909	create_pipe ();
		910
		911	atfork_parent ();
		912	}
		913
500	#define dREQ \	914	#define dREQ \
501	aio_req req; \	915	aio_req req; \
502	\	916	\
503	if (SvOK (callback) && !SvROK (callback)) \	917	if (SvOK (callback) && !SvROK (callback)) \
504	croak ("clalback must be undef or of reference type"); \	918	croak ("callback must be undef or of reference type"); \
505	\	919	\
506	Newz (0, req, 1, aio_cb); \	920	Newz (0, req, 1, aio_cb); \
507	if (!req) \	921	if (!req) \
508	croak ("out of memory during aio_req allocation"); \	922	croak ("out of memory during aio_req allocation"); \
509	\	923	\
510	req->callback = newSVsv (callback);	924	req->callback = newSVsv (callback)
		925
		926	#define REQ_SEND \
		927	req_send (req); \
		928	\
		929	if (GIMME_V != G_VOID) \
		930	XPUSHs (req_sv (req, AIO_REQ_KLASS));
511		931
512	MODULE = IO::AIO PACKAGE = IO::AIO	932	MODULE = IO::AIO PACKAGE = IO::AIO
513		933
514	PROTOTYPES: ENABLE	934	PROTOTYPES: ENABLE
515		935
516	BOOT:	936	BOOT:
517	{	937	{
		938	HV *stash = gv_stashpv ("IO::AIO", 1);
		939	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		940	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		941	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		942
518	create_pipe ();	943	create_pipe ();
519	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	944	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
520	}	945	}
521		946
522	void	947	void
523	min_parallel(nthreads)	948	min_parallel (nthreads)
524	int nthreads	949	int nthreads
525	PROTOTYPE: $	950	PROTOTYPE: $
526		951
527	void	952	void
528	max_parallel(nthreads)	953	max_parallel (nthreads)
529	int nthreads	954	int nthreads
530	PROTOTYPE: $	955	PROTOTYPE: $
531		956
532	int	957	int
533	max_outstanding(nreqs)	958	max_outstanding (nreqs)
534	int nreqs	959	int nreqs
535	PROTOTYPE: $	960	PROTOTYPE: $
536	CODE:	961	CODE:
537	RETVAL = max_outstanding;	962	RETVAL = max_outstanding;
538	max_outstanding = nreqs;	963	max_outstanding = nreqs;
539		964
540	void	965	void
541	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	966	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
542	SV * pathname	967	SV * pathname
543	int flags	968	int flags
544	int mode	969	int mode
545	SV * callback	970	SV * callback
546	PROTOTYPE: $$$;$	971	PROTOTYPE: $$$;$
547	CODE:	972	PPCODE:
548	{	973	{
549	dREQ;	974	dREQ;
550		975
551	req->type = REQ_OPEN;	976	req->type = REQ_OPEN;
552	req->data = newSVsv (pathname);	977	req->data = newSVsv (pathname);
553	req->dataptr = SvPVbyte_nolen (req->data);	978	req->dataptr = SvPVbyte_nolen (req->data);
554	req->fd = flags;	979	req->fd = flags;
555	req->mode = mode;	980	req->mode = mode;
556		981
557	send_req (req);	982	REQ_SEND;
558	}	983	}
559		984
560	void	985	void
561	aio_close(fh,callback=&PL_sv_undef)	986	aio_close (fh,callback=&PL_sv_undef)
562	SV * fh	987	SV * fh
563	SV * callback	988	SV * callback
564	PROTOTYPE: $;$	989	PROTOTYPE: $;$
565	ALIAS:	990	ALIAS:
566	aio_close = REQ_CLOSE	991	aio_close = REQ_CLOSE
567	aio_fsync = REQ_FSYNC	992	aio_fsync = REQ_FSYNC
568	aio_fdatasync = REQ_FDATASYNC	993	aio_fdatasync = REQ_FDATASYNC
569	CODE:	994	PPCODE:
570	{	995	{
571	dREQ;	996	dREQ;
572		997
573	req->type = ix;	998	req->type = ix;
574	req->fh = newSVsv (fh);	999	req->fh = newSVsv (fh);
575	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1000	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
576		1001
577	send_req (req);	1002	REQ_SEND (req);
578	}	1003	}
579		1004
580	void	1005	void
581	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1006	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
582	SV * fh	1007	SV * fh
583	UV offset	1008	UV offset
584	IV length	1009	UV length
585	SV * data	1010	SV * data
586	IV dataoffset	1011	UV dataoffset
587	SV * callback	1012	SV * callback
588	ALIAS:	1013	ALIAS:
589	aio_read = REQ_READ	1014	aio_read = REQ_READ
590	aio_write = REQ_WRITE	1015	aio_write = REQ_WRITE
591	PROTOTYPE: $$$$$;$	1016	PROTOTYPE: $$$$$;$
592	CODE:	1017	PPCODE:
593	{	1018	{
594	aio_req req;	1019	aio_req req;
595	STRLEN svlen;	1020	STRLEN svlen;
596	char *svptr = SvPVbyte (data, svlen);	1021	char *svptr = SvPVbyte (data, svlen);
597		1022
…		…
629	req->offset = offset;	1054	req->offset = offset;
630	req->length = length;	1055	req->length = length;
631	req->data = SvREFCNT_inc (data);	1056	req->data = SvREFCNT_inc (data);
632	req->dataptr = (char *)svptr + dataoffset;	1057	req->dataptr = (char *)svptr + dataoffset;
633		1058
634	send_req (req);	1059	if (!SvREADONLY (data))
		1060	{
		1061	SvREADONLY_on (data);
		1062	req->data2ptr = (void *)data;
		1063	}
		1064
		1065	REQ_SEND;
635	}	1066	}
636	}	1067	}
637		1068
638	void	1069	void
		1070	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1071	SV * out_fh
		1072	SV * in_fh
		1073	UV in_offset
		1074	UV length
		1075	SV * callback
		1076	PROTOTYPE: $$$$;$
		1077	PPCODE:
		1078	{
		1079	dREQ;
		1080
		1081	req->type = REQ_SENDFILE;
		1082	req->fh = newSVsv (out_fh);
		1083	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1084	req->fh2 = newSVsv (in_fh);
		1085	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1086	req->offset = in_offset;
		1087	req->length = length;
		1088
		1089	REQ_SEND;
		1090	}
		1091
		1092	void
639	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1093	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
640	SV * fh	1094	SV * fh
641	UV offset	1095	UV offset
642	IV length	1096	IV length
643	SV * callback	1097	SV * callback
644	PROTOTYPE: $$$;$	1098	PROTOTYPE: $$$;$
645	CODE:	1099	PPCODE:
646	{	1100	{
647	dREQ;	1101	dREQ;
648		1102
649	req->type = REQ_READAHEAD;	1103	req->type = REQ_READAHEAD;
650	req->fh = newSVsv (fh);	1104	req->fh = newSVsv (fh);
651	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1105	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
652	req->offset = offset;	1106	req->offset = offset;
653	req->length = length;	1107	req->length = length;
654		1108
655	send_req (req);	1109	REQ_SEND;
656	}	1110	}
657		1111
658	void	1112	void
659	aio_stat(fh_or_path,callback=&PL_sv_undef)	1113	aio_stat (fh_or_path,callback=&PL_sv_undef)
660	SV * fh_or_path	1114	SV * fh_or_path
661	SV * callback	1115	SV * callback
662	ALIAS:	1116	ALIAS:
663	aio_stat = REQ_STAT	1117	aio_stat = REQ_STAT
664	aio_lstat = REQ_LSTAT	1118	aio_lstat = REQ_LSTAT
665	CODE:	1119	PPCODE:
666	{	1120	{
667	dREQ;	1121	dREQ;
668		1122
669	New (0, req->statdata, 1, Stat_t);	1123	New (0, req->statdata, 1, Stat_t);
670	if (!req->statdata)	1124	if (!req->statdata)
671	{	1125	{
672	free_req (req);	1126	req_free (req);
673	croak ("out of memory during aio_req->statdata allocation");	1127	croak ("out of memory during aio_req->statdata allocation");
674	}	1128	}
675		1129
676	if (SvPOK (fh_or_path))	1130	if (SvPOK (fh_or_path))
677	{	1131	{
…		…
684	req->type = REQ_FSTAT;	1138	req->type = REQ_FSTAT;
685	req->fh = newSVsv (fh_or_path);	1139	req->fh = newSVsv (fh_or_path);
686	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1140	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
687	}	1141	}
688		1142
689	send_req (req);	1143	REQ_SEND;
690	}	1144	}
691		1145
692	void	1146	void
693	aio_unlink(pathname,callback=&PL_sv_undef)	1147	aio_unlink (pathname,callback=&PL_sv_undef)
694	SV * pathname	1148	SV * pathname
695	SV * callback	1149	SV * callback
696	ALIAS:	1150	ALIAS:
697	aio_unlink = REQ_UNLINK	1151	aio_unlink = REQ_UNLINK
698	aio_rmdir = REQ_RMDIR	1152	aio_rmdir = REQ_RMDIR
		1153	aio_readdir = REQ_READDIR
699	CODE:	1154	PPCODE:
700	{	1155	{
701	dREQ;	1156	dREQ;
702		1157
703	req->type = ix;	1158	req->type = ix;
704	req->data = newSVsv (pathname);	1159	req->data = newSVsv (pathname);
705	req->dataptr = SvPVbyte_nolen (req->data);	1160	req->dataptr = SvPVbyte_nolen (req->data);
706		1161
707	send_req (req);	1162	REQ_SEND;
708	}	1163	}
709		1164
710	void	1165	void
711	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1166	aio_link (oldpath,newpath,callback=&PL_sv_undef)
712	SV * oldpath	1167	SV * oldpath
713	SV * newpath	1168	SV * newpath
714	SV * callback	1169	SV * callback
		1170	ALIAS:
		1171	aio_link = REQ_LINK
		1172	aio_symlink = REQ_SYMLINK
		1173	aio_rename = REQ_RENAME
715	CODE:	1174	PPCODE:
716	{	1175	{
717	dREQ;	1176	dREQ;
718		1177
719	req->type = REQ_SYMLINK;	1178	req->type = ix;
720	req->fh = newSVsv (oldpath);	1179	req->fh = newSVsv (oldpath);
721	req->data2ptr = SvPVbyte_nolen (req->fh);	1180	req->data2ptr = SvPVbyte_nolen (req->fh);
722	req->data = newSVsv (newpath);	1181	req->data = newSVsv (newpath);
723	req->dataptr = SvPVbyte_nolen (req->data);	1182	req->dataptr = SvPVbyte_nolen (req->data);
724		1183
725	send_req (req);	1184	REQ_SEND;
726	}	1185	}
727		1186
728	void	1187	void
		1188	aio_sleep (delay,callback=&PL_sv_undef)
		1189	double delay
		1190	SV * callback
		1191	PPCODE:
		1192	{
		1193	dREQ;
		1194
		1195	req->type = REQ_SLEEP;
		1196	req->fd = delay < 0. ? 0 : delay;
		1197	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1198
		1199	REQ_SEND;
		1200	}
		1201
		1202	void
		1203	aio_group (callback=&PL_sv_undef)
		1204	SV * callback
		1205	PROTOTYPE: ;$
		1206	PPCODE:
		1207	{
		1208	dREQ;
		1209	req->type = REQ_GROUP;
		1210	req_send (req);
		1211	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1212	}
		1213
		1214	void
729	flush()	1215	flush ()
730	PROTOTYPE:	1216	PROTOTYPE:
731	CODE:	1217	CODE:
732	while (nreqs)	1218	while (nreqs)
733	{	1219	{
734	poll_wait ();	1220	poll_wait ();
…		…
774	CODE:	1260	CODE:
775	RETVAL = nreqs;	1261	RETVAL = nreqs;
776	OUTPUT:	1262	OUTPUT:
777	RETVAL	1263	RETVAL
778		1264
		1265	PROTOTYPES: DISABLE
		1266
		1267	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1268
		1269	void
		1270	cancel (aio_req_ornot req)
		1271	PROTOTYPE:
		1272	CODE:
		1273	req_cancel (req);
		1274
		1275	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1276
		1277	void
		1278	add (aio_req grp, ...)
		1279	PPCODE:
		1280	{
		1281	int i;
		1282
		1283	if (grp->fd == 2)
		1284	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1285
		1286	for (i = 1; i < items; ++i )
		1287	{
		1288	if (GIMME_V != G_VOID)
		1289	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1290
		1291	aio_req req = SvAIO_REQ (ST (i));
		1292
		1293	if (req)
		1294	{
		1295	++grp->length;
		1296	req->grp = grp;
		1297
		1298	req->grp_prev = 0;
		1299	req->grp_next = grp->grp_first;
		1300
		1301	if (grp->grp_first)
		1302	grp->grp_first->grp_prev = req;
		1303
		1304	grp->grp_first = req;
		1305	}
		1306	}
		1307	}
		1308
		1309	void
		1310	lock (aio_req grp)
		1311	CODE:
		1312	++grp->length;
		1313
		1314	void
		1315	unlock (aio_req grp)
		1316	CODE:
		1317	aio_grp_dec (grp);
		1318
		1319	void
		1320	feeder_limit (aio_req grp, int limit)
		1321	CODE:
		1322	grp->fd2 = limit;
		1323	aio_grp_feed (grp);
		1324
		1325	void
		1326	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)
		1327	CODE:
		1328	{
		1329	SvREFCNT_dec (grp->fh2);
		1330	grp->fh2 = newSVsv (callback);
		1331
		1332	if (grp->fd2 <= 0)
		1333	grp->fd2 = 2;
		1334
		1335	aio_grp_feed (grp);
		1336	}
		1337

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.27 by root, Wed Aug 17 04:47:02 2005 UTC vs. Revision 1.50 by root, Sun Oct 22 21:13:47 2006 UTC

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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.27 by root, Wed Aug 17 04:47:02 2005 UTC vs.
Revision 1.50 by root, Sun Oct 22 21:13:47 2006 UTC