[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 1.49 by root, Sun Oct 22 13:33:28 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
72	static void free_req (aio_req req)	106	static void req_free (aio_req req);
73	{
74	if (req->data)
75	SvREFCNT_dec (req->data);
76		107
		108	/* must be called at most once */
		109	static SV req_sv (aio_req req, const char klass)
		110	{
77	if (req->fh)	111	if (!req->self)
		112	{
		113	req->self = (SV *)newHV ();
		114	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		115	}
		116
		117	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		118	}
		119
		120	static aio_req SvAIO_REQ (SV *sv)
		121	{
		122	if (!sv_derived_from (sv, AIO_REQ_KLASS) \|\| !SvROK (sv))
		123	croak ("object of class " AIO_REQ_KLASS " expected");
		124
		125	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		126
		127	return mg ? (aio_req)mg->mg_ptr : 0;
		128	}
		129
		130	static void aio_grp_feed (aio_req grp)
		131	{
		132	while (grp->length < grp->fd2)
		133	{
		134	int old_len = grp->length;
		135
		136	if (grp->fh2 && SvOK (grp->fh2))
		137	{
		138	dSP;
		139
		140	ENTER;
		141	SAVETMPS;
		142	PUSHMARK (SP);
		143	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		144	PUTBACK;
		145	call_sv (grp->fh2, G_VOID \| G_EVAL);
		146	SPAGAIN;
		147	FREETMPS;
		148	LEAVE;
		149	}
		150
		151	/* stop if no progress has been made */
		152	if (old_len == grp->length)
		153	{
78	SvREFCNT_dec (req->fh);	154	SvREFCNT_dec (grp->fh2);
79		155	grp->fh2 = 0;
80	if (req->statdata)	156	break;
81	Safefree (req->statdata);	157	}
82		158	}
83	if (req->callback)
84	SvREFCNT_dec (req->callback);
85
86	Safefree (req);
87	}	159	}
88		160
89	static void	161	static void poll_wait ()
90	poll_wait ()
91	{	162	{
92	if (nreqs && !ress)	163	if (nreqs && !ress)
93	{	164	{
94	fd_set rfd;	165	fd_set rfd;
95	FD_ZERO(&rfd);	166	FD_ZERO(&rfd);
…		…
97		168
98	select (respipe [0] + 1, &rfd, 0, 0, 0);	169	select (respipe [0] + 1, &rfd, 0, 0, 0);
99	}	170	}
100	}	171	}
101		172
102	static int	173	static void req_invoke (aio_req req)
103	poll_cb ()	174	{
		175	dSP;
		176	int errorno = errno;
		177
		178	if (req->cancelled \|\| !SvOK (req->callback))
		179	return;
		180
		181	errno = req->errorno;
		182
		183	ENTER;
		184	SAVETMPS;
		185	PUSHMARK (SP);
		186	EXTEND (SP, 1);
		187
		188	switch (req->type)
		189	{
		190	case REQ_READDIR:
		191	{
		192	SV *rv = &PL_sv_undef;
		193
		194	if (req->result >= 0)
		195	{
		196	char *buf = req->data2ptr;
		197	AV *av = newAV ();
		198
		199	while (req->result)
		200	{
		201	SV *sv = newSVpv (buf, 0);
		202
		203	av_push (av, sv);
		204	buf += SvCUR (sv) + 1;
		205	req->result--;
		206	}
		207
		208	rv = sv_2mortal (newRV_noinc ((SV *)av));
		209	}
		210
		211	PUSHs (rv);
		212	}
		213	break;
		214
		215	case REQ_OPEN:
		216	{
		217	/* convert fd to fh */
		218	SV *fh;
		219
		220	PUSHs (sv_2mortal (newSViv (req->result)));
		221	PUTBACK;
		222	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		223	SPAGAIN;
		224
		225	fh = SvREFCNT_inc (POPs);
		226
		227	PUSHMARK (SP);
		228	XPUSHs (sv_2mortal (fh));
		229	}
		230	break;
		231
		232	case REQ_GROUP:
		233	req->fd = 2; /* mark group as finished */
		234
		235	if (req->data)
		236	{
		237	int i;
		238	AV av = (AV )req->data;
		239
		240	EXTEND (SP, AvFILL (av) + 1);
		241	for (i = 0; i <= AvFILL (av); ++i)
		242	PUSHs (*av_fetch (av, i, 0));
		243	}
		244	break;
		245
		246	case REQ_SLEEP:
		247	break;
		248
		249	default:
		250	PUSHs (sv_2mortal (newSViv (req->result)));
		251	break;
		252	}
		253
		254
		255	PUTBACK;
		256	call_sv (req->callback, G_VOID \| G_EVAL);
		257	SPAGAIN;
		258
		259	if (SvTRUE (ERRSV))
		260	{
		261	req_free (req);
		262	croak (0);
		263	}
		264
		265	FREETMPS;
		266	LEAVE;
		267
		268	errno = errorno;
		269	}
		270
		271	static void req_free (aio_req req)
		272	{
		273	if (req->grp)
		274	{
		275	aio_req grp = req->grp;
		276
		277	/* unlink request */
		278	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		279	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		280
		281	if (grp->grp_first == req)
		282	grp->grp_first = req->grp_next;
		283
		284	--grp->length;
		285
		286	/* call feeder, if applicable */
		287	aio_grp_feed (grp);
		288
		289	/* finish, if done */
		290	if (!grp->length && grp->fd)
		291	{
		292	req_invoke (grp);
		293	req_free (grp);
		294	}
		295	}
		296
		297	if (req->self)
		298	{
		299	sv_unmagic (req->self, PERL_MAGIC_ext);
		300	SvREFCNT_dec (req->self);
		301	}
		302
		303	SvREFCNT_dec (req->data);
		304	SvREFCNT_dec (req->fh);
		305	SvREFCNT_dec (req->fh2);
		306	SvREFCNT_dec (req->callback);
		307	Safefree (req->statdata);
		308
		309	if (req->type == REQ_READDIR && req->result >= 0)
		310	free (req->data2ptr);
		311
		312	Safefree (req);
		313	}
		314
		315	static void req_cancel (aio_req req)
		316	{
		317	req->cancelled = 1;
		318
		319	if (req->type == REQ_GROUP)
		320	{
		321	aio_req sub;
		322
		323	for (sub = req->grp_first; sub; sub = sub->grp_next)
		324	req_cancel (sub);
		325	}
		326	}
		327
		328	static int poll_cb ()
104	{	329	{
105	dSP;	330	dSP;
106	int count = 0;	331	int count = 0;
107	int do_croak = 0;	332	int do_croak = 0;
108	aio_req req;	333	aio_req req;
…		…
116	{	341	{
117	ress = req->next;	342	ress = req->next;
118		343
119	if (!ress)	344	if (!ress)
120	{	345	{
121	rese = 0;
122
123	/* read any signals sent by the worker threads */	346	/* read any signals sent by the worker threads */
124	char buf [32];	347	char buf [32];
125	while (read (respipe [0], buf, 32) == 32)	348	while (read (respipe [0], buf, 32) == 32)
126	;	349	;
		350
		351	rese = 0;
127	}	352	}
128	}	353	}
129		354
130	pthread_mutex_unlock (&reslock);	355	pthread_mutex_unlock (&reslock);
131		356
…		…
134		359
135	nreqs--;	360	nreqs--;
136		361
137	if (req->type == REQ_QUIT)	362	if (req->type == REQ_QUIT)
138	started--;	363	started--;
		364	else if (req->type == REQ_GROUP && req->length)
		365	{
		366	req->fd = 1; /* mark request as delayed */
		367	continue;
		368	}
139	else	369	else
140	{	370	{
141	int errorno = errno;
142	errno = req->errorno;
143
144	if (req->type == REQ_READ)	371	if (req->type == REQ_READ)
145	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));	372	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		373
		374	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
		375	SvREADONLY_off (req->data);
146		376
147	if (req->statdata)	377	if (req->statdata)
148	{	378	{
149	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	379	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
150	PL_laststatval = req->result;	380	PL_laststatval = req->result;
151	PL_statcache = *(req->statdata);	381	PL_statcache = *(req->statdata);
152	}	382	}
153		383
154	ENTER;	384	req_invoke (req);
155	PUSHMARK (SP);
156	XPUSHs (sv_2mortal (newSViv (req->result)));
157		385
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++;	386	count++;
190	}	387	}
191		388
192	free_req (req);	389	req_free (req);
193	}	390	}
194		391
195	return count;	392	return count;
196	}	393	}
197		394
198	static void aio_proc(void arg);	395	static void aio_proc(void arg);
199		396
200	static void
201	start_thread (void)	397	static void start_thread (void)
202	{	398	{
203	sigset_t fullsigset, oldsigset;	399	sigset_t fullsigset, oldsigset;
204	pthread_t tid;	400	pthread_t tid;
205	pthread_attr_t attr;	401	pthread_attr_t attr;
206		402
…		…
215	started++;	411	started++;
216		412
217	sigprocmask (SIG_SETMASK, &oldsigset, 0);	413	sigprocmask (SIG_SETMASK, &oldsigset, 0);
218	}	414	}
219		415
220	static void	416	static void req_send (aio_req req)
221	send_req (aio_req req)
222	{	417	{
		418	while (started < wanted && nreqs >= started)
		419	start_thread ();
		420
223	nreqs++;	421	nreqs++;
224		422
225	pthread_mutex_lock (&reqlock);	423	pthread_mutex_lock (&reqlock);
226		424
227	req->next = 0;	425	req->next = 0;
…		…
247		445
248	poll_wait ();	446	poll_wait ();
249	}	447	}
250	}	448	}
251		449
252	static void	450	static void end_thread (void)
253	end_thread (void)
254	{	451	{
255	aio_req req;	452	aio_req req;
256	Newz (0, req, 1, aio_cb);	453	Newz (0, req, 1, aio_cb);
257	req->type = REQ_QUIT;	454	req->type = REQ_QUIT;
258		455
259	send_req (req);	456	req_send (req);
260	}	457	}
261		458
262	static void min_parallel (int nthreads)	459	static void min_parallel (int nthreads)
263	{	460	{
264	while (nthreads > started)	461	if (wanted < nthreads)
265	start_thread ();	462	wanted = nthreads;
266	}	463	}
267		464
268	static void max_parallel (int nthreads)	465	static void max_parallel (int nthreads)
269	{	466	{
270	int cur = started;	467	int cur = started;
271		468
		469	if (wanted > nthreads)
		470	wanted = nthreads;
		471
272	while (cur > nthreads)	472	while (cur > wanted)
273	{	473	{
274	end_thread ();	474	end_thread ();
275	cur--;	475	cur--;
276	}	476	}
277		477
278	while (started > nthreads)	478	while (started > wanted)
279	{	479	{
280	poll_wait ();	480	poll_wait ();
281	poll_cb ();	481	poll_cb ();
282	}	482	}
283	}	483	}
…		…
290	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	490	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
291	croak ("cannot set result pipe to nonblocking mode");	491	croak ("cannot set result pipe to nonblocking mode");
292		492
293	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	493	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
294	croak ("cannot set result pipe to nonblocking mode");	494	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	}	495	}
339		496
340	/*****************************************************************************/	497	/*****************************************************************************/
341	/* work around various missing functions */	498	/* work around various missing functions */
342		499
…		…
347	/*	504	/*
348	* make our pread/pwrite safe against themselves, but not against	505	* make our pread/pwrite safe against themselves, but not against
349	* normal read/write by using a mutex. slows down execution a lot,	506	* normal read/write by using a mutex. slows down execution a lot,
350	* but that's your problem, not mine.	507	* but that's your problem, not mine.
351	*/	508	*/
352	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	509	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
353		510
354	static ssize_t	511	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	{	512	{
357	ssize_t res;	513	ssize_t res;
358	off_t ooffset;	514	off_t ooffset;
359		515
360	pthread_mutex_lock (&iolock);	516	pthread_mutex_lock (&preadwritelock);
361	ooffset = lseek (fd, 0, SEEK_CUR);	517	ooffset = lseek (fd, 0, SEEK_CUR);
362	lseek (fd, offset, SEEK_SET);	518	lseek (fd, offset, SEEK_SET);
363	res = read (fd, buf, count);	519	res = read (fd, buf, count);
364	lseek (fd, ooffset, SEEK_SET);	520	lseek (fd, ooffset, SEEK_SET);
365	pthread_mutex_unlock (&iolock);	521	pthread_mutex_unlock (&preadwritelock);
366		522
367	return res;	523	return res;
368	}	524	}
369		525
370	static ssize_t
371	pwrite (int fd, void *buf, size_t count, off_t offset)	526	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
372	{	527	{
373	ssize_t res;	528	ssize_t res;
374	off_t ooffset;	529	off_t ooffset;
375		530
376	pthread_mutex_lock (&iolock);	531	pthread_mutex_lock (&preadwritelock);
377	ooffset = lseek (fd, 0, SEEK_CUR);	532	ooffset = lseek (fd, 0, SEEK_CUR);
378	lseek (fd, offset, SEEK_SET);	533	lseek (fd, offset, SEEK_SET);
379	res = write (fd, buf, count);	534	res = write (fd, buf, count);
380	lseek (fd, offset, SEEK_SET);	535	lseek (fd, offset, SEEK_SET);
381	pthread_mutex_unlock (&iolock);	536	pthread_mutex_unlock (&preadwritelock);
382		537
383	return res;	538	return res;
384	}	539	}
385	#endif	540	#endif
386		541
…		…
389	#endif	544	#endif
390		545
391	#if !HAVE_READAHEAD	546	#if !HAVE_READAHEAD
392	# define readahead aio_readahead	547	# define readahead aio_readahead
393		548
		549	static ssize_t readahead (int fd, off_t offset, size_t count)
		550	{
394	static char readahead_buf[4096];	551	char readahead_buf[4096];
395		552
396	static ssize_t
397	readahead (int fd, off_t offset, size_t count)
398	{
399	while (count > 0)	553	while (count > 0)
400	{	554	{
401	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	555	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
402		556
403	pread (fd, readahead_buf, len, offset);	557	pread (fd, readahead_buf, len, offset);
…		…
407		561
408	errno = 0;	562	errno = 0;
409	}	563	}
410	#endif	564	#endif
411		565
		566	#if !HAVE_READDIR_R
		567	# define readdir_r aio_readdir_r
		568
		569	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		570
		571	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
		572	{
		573	struct dirent *e;
		574	int errorno;
		575
		576	pthread_mutex_lock (&readdirlock);
		577
		578	e = readdir (dirp);
		579	errorno = errno;
		580
		581	if (e)
		582	{
		583	*res = ent;
		584	strcpy (ent->d_name, e->d_name);
		585	}
		586	else
		587	*res = 0;
		588
		589	pthread_mutex_unlock (&readdirlock);
		590
		591	errno = errorno;
		592	return e ? 0 : -1;
		593	}
		594	#endif
		595
		596	/* sendfile always needs emulation */
		597	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
		598	{
		599	ssize_t res;
		600
		601	if (!count)
		602	return 0;
		603
		604	#if HAVE_SENDFILE
		605	# if __linux
		606	res = sendfile (ofd, ifd, &offset, count);
		607
		608	# elif __freebsd
		609	/*
		610	* Of course, the freebsd sendfile is a dire hack with no thoughts
		611	* wasted on making it similar to other I/O functions.
		612	*/
		613	{
		614	off_t sbytes;
		615	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		616
		617	if (res < 0 && sbytes)
		618	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
		619	res = sbytes;
		620	}
		621
		622	# elif __hpux
		623	res = sendfile (ofd, ifd, offset, count, 0, 0);
		624
		625	# elif __solaris
		626	{
		627	struct sendfilevec vec;
		628	size_t sbytes;
		629
		630	vec.sfv_fd = ifd;
		631	vec.sfv_flag = 0;
		632	vec.sfv_off = offset;
		633	vec.sfv_len = count;
		634
		635	res = sendfilev (ofd, &vec, 1, &sbytes);
		636
		637	if (res < 0 && sbytes)
		638	res = sbytes;
		639	}
		640
		641	# endif
		642	#else
		643	res = -1;
		644	errno = ENOSYS;
		645	#endif
		646
		647	if (res < 0
		648	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK
		649	#if __solaris
		650	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE
		651	#endif
		652	)
		653	)
		654	{
		655	/* emulate sendfile. this is a major pain in the ass */
		656	char buf[4096];
		657	res = 0;
		658
		659	while (count)
		660	{
		661	ssize_t cnt;
		662
		663	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
		664
		665	if (cnt <= 0)
		666	{
		667	if (cnt && !res) res = -1;
		668	break;
		669	}
		670
		671	cnt = write (ofd, buf, cnt);
		672
		673	if (cnt <= 0)
		674	{
		675	if (cnt && !res) res = -1;
		676	break;
		677	}
		678
		679	offset += cnt;
		680	res += cnt;
		681	count -= cnt;
		682	}
		683	}
		684
		685	return res;
		686	}
		687
		688	/* read a full directory */
		689	static int scandir_ (const char path, void *namesp)
		690	{
		691	DIR *dirp = opendir (path);
		692	union
		693	{
		694	struct dirent d;
		695	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		696	} u;
		697	struct dirent *entp;
		698	char name, names;
		699	int memlen = 4096;
		700	int memofs = 0;
		701	int res = 0;
		702	int errorno;
		703
		704	if (!dirp)
		705	return -1;
		706
		707	names = malloc (memlen);
		708
		709	for (;;)
		710	{
		711	errno = 0, readdir_r (dirp, &u.d, &entp);
		712
		713	if (!entp)
		714	break;
		715
		716	name = entp->d_name;
		717
		718	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
		719	{
		720	int len = strlen (name) + 1;
		721
		722	res++;
		723
		724	while (memofs + len > memlen)
		725	{
		726	memlen *= 2;
		727	names = realloc (names, memlen);
		728	if (!names)
		729	break;
		730	}
		731
		732	memcpy (names + memofs, name, len);
		733	memofs += len;
		734	}
		735	}
		736
		737	errorno = errno;
		738	closedir (dirp);
		739
		740	if (errorno)
		741	{
		742	free (names);
		743	errno = errorno;
		744	res = -1;
		745	}
		746
		747	namesp = (void )names;
		748	return res;
		749	}
		750
412	/*****************************************************************************/	751	/*****************************************************************************/
413		752
414	static void *
415	aio_proc (void *thr_arg)	753	static void aio_proc (void thr_arg)
416	{	754	{
417	aio_req req;	755	aio_req req;
418	int type;	756	int type;
419		757
420	do	758	do
…		…
439		777
440	pthread_mutex_unlock (&reqlock);	778	pthread_mutex_unlock (&reqlock);
441		779
442	errno = 0; /* strictly unnecessary */	780	errno = 0; /* strictly unnecessary */
443		781
444	type = req->type;	782	if (!req->cancelled)
445
446	switch (type)	783	switch (req->type)
447	{	784	{
448	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	785	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;	786	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
450		787
451	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	788	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
		789	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
452		790
453	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	791	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
454	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	792	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
455	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	793	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
456		794
457	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	795	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
458	case REQ_CLOSE: req->result = close (req->fd); break;	796	case REQ_CLOSE: req->result = close (req->fd); break;
459	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	797	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
460	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	798	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		799	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		800	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
461	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	801	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
462		802
463	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	803	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
464	case REQ_FSYNC: req->result = fsync (req->fd); break;	804	case REQ_FSYNC: req->result = fsync (req->fd); break;
		805	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
465		806
		807	case REQ_SLEEP:
		808	{
		809	struct timeval tv;
		810
		811	tv.tv_sec = req->fd;
		812	tv.tv_usec = req->fd2;
		813
		814	req->result = select (0, 0, 0, 0, &tv);
		815	}
		816
466	case REQ_QUIT:	817	case REQ_QUIT:
467	break;	818	break;
468		819
469	default:	820	default:
470	req->result = ENOSYS;	821	req->result = ENOSYS;
471	break;	822	break;
472	}	823	}
473		824
474	req->errorno = errno;	825	req->errorno = errno;
475		826
476	pthread_mutex_lock (&reslock);	827	pthread_mutex_lock (&reslock);
477		828
…		…
495	while (type != REQ_QUIT);	846	while (type != REQ_QUIT);
496		847
497	return 0;	848	return 0;
498	}	849	}
499		850
		851	/*****************************************************************************/
		852
		853	static void atfork_prepare (void)
		854	{
		855	pthread_mutex_lock (&reqlock);
		856	pthread_mutex_lock (&reslock);
		857	#if !HAVE_PREADWRITE
		858	pthread_mutex_lock (&preadwritelock);
		859	#endif
		860	#if !HAVE_READDIR_R
		861	pthread_mutex_lock (&readdirlock);
		862	#endif
		863	}
		864
		865	static void atfork_parent (void)
		866	{
		867	#if !HAVE_READDIR_R
		868	pthread_mutex_unlock (&readdirlock);
		869	#endif
		870	#if !HAVE_PREADWRITE
		871	pthread_mutex_unlock (&preadwritelock);
		872	#endif
		873	pthread_mutex_unlock (&reslock);
		874	pthread_mutex_unlock (&reqlock);
		875	}
		876
		877	static void atfork_child (void)
		878	{
		879	aio_req prv;
		880
		881	started = 0;
		882
		883	while (reqs)
		884	{
		885	prv = reqs;
		886	reqs = prv->next;
		887	req_free (prv);
		888	}
		889
		890	reqs = reqe = 0;
		891
		892	while (ress)
		893	{
		894	prv = ress;
		895	ress = prv->next;
		896	req_free (prv);
		897	}
		898
		899	ress = rese = 0;
		900
		901	close (respipe [0]);
		902	close (respipe [1]);
		903	create_pipe ();
		904
		905	atfork_parent ();
		906	}
		907
500	#define dREQ \	908	#define dREQ \
501	aio_req req; \	909	aio_req req; \
502	\	910	\
503	if (SvOK (callback) && !SvROK (callback)) \	911	if (SvOK (callback) && !SvROK (callback)) \
504	croak ("clalback must be undef or of reference type"); \	912	croak ("callback must be undef or of reference type"); \
505	\	913	\
506	Newz (0, req, 1, aio_cb); \	914	Newz (0, req, 1, aio_cb); \
507	if (!req) \	915	if (!req) \
508	croak ("out of memory during aio_req allocation"); \	916	croak ("out of memory during aio_req allocation"); \
509	\	917	\
510	req->callback = newSVsv (callback);	918	req->callback = newSVsv (callback)
		919
		920	#define REQ_SEND \
		921	req_send (req); \
		922	\
		923	if (GIMME_V != G_VOID) \
		924	XPUSHs (req_sv (req, AIO_REQ_KLASS));
511		925
512	MODULE = IO::AIO PACKAGE = IO::AIO	926	MODULE = IO::AIO PACKAGE = IO::AIO
513		927
514	PROTOTYPES: ENABLE	928	PROTOTYPES: ENABLE
515		929
516	BOOT:	930	BOOT:
517	{	931	{
		932	HV *stash = gv_stashpv ("IO::AIO", 1);
		933	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		934	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		935	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		936
518	create_pipe ();	937	create_pipe ();
519	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	938	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
520	}	939	}
521		940
522	void	941	void
523	min_parallel(nthreads)	942	min_parallel (nthreads)
524	int nthreads	943	int nthreads
525	PROTOTYPE: $	944	PROTOTYPE: $
526		945
527	void	946	void
528	max_parallel(nthreads)	947	max_parallel (nthreads)
529	int nthreads	948	int nthreads
530	PROTOTYPE: $	949	PROTOTYPE: $
531		950
532	int	951	int
533	max_outstanding(nreqs)	952	max_outstanding (nreqs)
534	int nreqs	953	int nreqs
535	PROTOTYPE: $	954	PROTOTYPE: $
536	CODE:	955	CODE:
537	RETVAL = max_outstanding;	956	RETVAL = max_outstanding;
538	max_outstanding = nreqs;	957	max_outstanding = nreqs;
539		958
540	void	959	void
541	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	960	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
542	SV * pathname	961	SV * pathname
543	int flags	962	int flags
544	int mode	963	int mode
545	SV * callback	964	SV * callback
546	PROTOTYPE: $$$;$	965	PROTOTYPE: $$$;$
547	CODE:	966	PPCODE:
548	{	967	{
549	dREQ;	968	dREQ;
550		969
551	req->type = REQ_OPEN;	970	req->type = REQ_OPEN;
552	req->data = newSVsv (pathname);	971	req->data = newSVsv (pathname);
553	req->dataptr = SvPVbyte_nolen (req->data);	972	req->dataptr = SvPVbyte_nolen (req->data);
554	req->fd = flags;	973	req->fd = flags;
555	req->mode = mode;	974	req->mode = mode;
556		975
557	send_req (req);	976	REQ_SEND;
558	}	977	}
559		978
560	void	979	void
561	aio_close(fh,callback=&PL_sv_undef)	980	aio_close (fh,callback=&PL_sv_undef)
562	SV * fh	981	SV * fh
563	SV * callback	982	SV * callback
564	PROTOTYPE: $;$	983	PROTOTYPE: $;$
565	ALIAS:	984	ALIAS:
566	aio_close = REQ_CLOSE	985	aio_close = REQ_CLOSE
567	aio_fsync = REQ_FSYNC	986	aio_fsync = REQ_FSYNC
568	aio_fdatasync = REQ_FDATASYNC	987	aio_fdatasync = REQ_FDATASYNC
569	CODE:	988	PPCODE:
570	{	989	{
571	dREQ;	990	dREQ;
572		991
573	req->type = ix;	992	req->type = ix;
574	req->fh = newSVsv (fh);	993	req->fh = newSVsv (fh);
575	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	994	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
576		995
577	send_req (req);	996	REQ_SEND (req);
578	}	997	}
579		998
580	void	999	void
581	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1000	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
582	SV * fh	1001	SV * fh
583	UV offset	1002	UV offset
584	IV length	1003	UV length
585	SV * data	1004	SV * data
586	IV dataoffset	1005	UV dataoffset
587	SV * callback	1006	SV * callback
588	ALIAS:	1007	ALIAS:
589	aio_read = REQ_READ	1008	aio_read = REQ_READ
590	aio_write = REQ_WRITE	1009	aio_write = REQ_WRITE
591	PROTOTYPE: $$$$$;$	1010	PROTOTYPE: $$$$$;$
592	CODE:	1011	PPCODE:
593	{	1012	{
594	aio_req req;	1013	aio_req req;
595	STRLEN svlen;	1014	STRLEN svlen;
596	char *svptr = SvPVbyte (data, svlen);	1015	char *svptr = SvPVbyte (data, svlen);
597		1016
…		…
629	req->offset = offset;	1048	req->offset = offset;
630	req->length = length;	1049	req->length = length;
631	req->data = SvREFCNT_inc (data);	1050	req->data = SvREFCNT_inc (data);
632	req->dataptr = (char *)svptr + dataoffset;	1051	req->dataptr = (char *)svptr + dataoffset;
633		1052
634	send_req (req);	1053	if (!SvREADONLY (data))
		1054	{
		1055	SvREADONLY_on (data);
		1056	req->data2ptr = (void *)data;
		1057	}
		1058
		1059	REQ_SEND;
635	}	1060	}
636	}	1061	}
637		1062
638	void	1063	void
		1064	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1065	SV * out_fh
		1066	SV * in_fh
		1067	UV in_offset
		1068	UV length
		1069	SV * callback
		1070	PROTOTYPE: $$$$;$
		1071	PPCODE:
		1072	{
		1073	dREQ;
		1074
		1075	req->type = REQ_SENDFILE;
		1076	req->fh = newSVsv (out_fh);
		1077	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1078	req->fh2 = newSVsv (in_fh);
		1079	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1080	req->offset = in_offset;
		1081	req->length = length;
		1082
		1083	REQ_SEND;
		1084	}
		1085
		1086	void
639	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1087	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
640	SV * fh	1088	SV * fh
641	UV offset	1089	UV offset
642	IV length	1090	IV length
643	SV * callback	1091	SV * callback
644	PROTOTYPE: $$$;$	1092	PROTOTYPE: $$$;$
645	CODE:	1093	PPCODE:
646	{	1094	{
647	dREQ;	1095	dREQ;
648		1096
649	req->type = REQ_READAHEAD;	1097	req->type = REQ_READAHEAD;
650	req->fh = newSVsv (fh);	1098	req->fh = newSVsv (fh);
651	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1099	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
652	req->offset = offset;	1100	req->offset = offset;
653	req->length = length;	1101	req->length = length;
654		1102
655	send_req (req);	1103	REQ_SEND;
656	}	1104	}
657		1105
658	void	1106	void
659	aio_stat(fh_or_path,callback=&PL_sv_undef)	1107	aio_stat (fh_or_path,callback=&PL_sv_undef)
660	SV * fh_or_path	1108	SV * fh_or_path
661	SV * callback	1109	SV * callback
662	ALIAS:	1110	ALIAS:
663	aio_stat = REQ_STAT	1111	aio_stat = REQ_STAT
664	aio_lstat = REQ_LSTAT	1112	aio_lstat = REQ_LSTAT
665	CODE:	1113	PPCODE:
666	{	1114	{
667	dREQ;	1115	dREQ;
668		1116
669	New (0, req->statdata, 1, Stat_t);	1117	New (0, req->statdata, 1, Stat_t);
670	if (!req->statdata)	1118	if (!req->statdata)
671	{	1119	{
672	free_req (req);	1120	req_free (req);
673	croak ("out of memory during aio_req->statdata allocation");	1121	croak ("out of memory during aio_req->statdata allocation");
674	}	1122	}
675		1123
676	if (SvPOK (fh_or_path))	1124	if (SvPOK (fh_or_path))
677	{	1125	{
…		…
684	req->type = REQ_FSTAT;	1132	req->type = REQ_FSTAT;
685	req->fh = newSVsv (fh_or_path);	1133	req->fh = newSVsv (fh_or_path);
686	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1134	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
687	}	1135	}
688		1136
689	send_req (req);	1137	REQ_SEND;
690	}	1138	}
691		1139
692	void	1140	void
693	aio_unlink(pathname,callback=&PL_sv_undef)	1141	aio_unlink (pathname,callback=&PL_sv_undef)
694	SV * pathname	1142	SV * pathname
695	SV * callback	1143	SV * callback
696	ALIAS:	1144	ALIAS:
697	aio_unlink = REQ_UNLINK	1145	aio_unlink = REQ_UNLINK
698	aio_rmdir = REQ_RMDIR	1146	aio_rmdir = REQ_RMDIR
		1147	aio_readdir = REQ_READDIR
699	CODE:	1148	PPCODE:
700	{	1149	{
701	dREQ;	1150	dREQ;
702		1151
703	req->type = ix;	1152	req->type = ix;
704	req->data = newSVsv (pathname);	1153	req->data = newSVsv (pathname);
705	req->dataptr = SvPVbyte_nolen (req->data);	1154	req->dataptr = SvPVbyte_nolen (req->data);
706		1155
707	send_req (req);	1156	REQ_SEND;
708	}	1157	}
709		1158
710	void	1159	void
711	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1160	aio_link (oldpath,newpath,callback=&PL_sv_undef)
712	SV * oldpath	1161	SV * oldpath
713	SV * newpath	1162	SV * newpath
714	SV * callback	1163	SV * callback
		1164	ALIAS:
		1165	aio_link = REQ_LINK
		1166	aio_symlink = REQ_SYMLINK
		1167	aio_rename = REQ_RENAME
715	CODE:	1168	PPCODE:
716	{	1169	{
717	dREQ;	1170	dREQ;
718		1171
719	req->type = REQ_SYMLINK;	1172	req->type = ix;
720	req->fh = newSVsv (oldpath);	1173	req->fh = newSVsv (oldpath);
721	req->data2ptr = SvPVbyte_nolen (req->fh);	1174	req->data2ptr = SvPVbyte_nolen (req->fh);
722	req->data = newSVsv (newpath);	1175	req->data = newSVsv (newpath);
723	req->dataptr = SvPVbyte_nolen (req->data);	1176	req->dataptr = SvPVbyte_nolen (req->data);
724		1177
725	send_req (req);	1178	REQ_SEND;
726	}	1179	}
727		1180
728	void	1181	void
		1182	aio_sleep (delay,callback=&PL_sv_undef)
		1183	double delay
		1184	SV * callback
		1185	PPCODE:
		1186	{
		1187	dREQ;
		1188
		1189	req->type = REQ_SLEEP;
		1190	req->fd = delay < 0. ? 0 : delay;
		1191	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1192
		1193	REQ_SEND;
		1194	}
		1195
		1196	void
		1197	aio_group (callback=&PL_sv_undef)
		1198	SV * callback
		1199	PROTOTYPE: ;$
		1200	PPCODE:
		1201	{
		1202	dREQ;
		1203	req->type = REQ_GROUP;
		1204	req_send (req);
		1205	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1206	}
		1207
		1208	void
729	flush()	1209	flush ()
730	PROTOTYPE:	1210	PROTOTYPE:
731	CODE:	1211	CODE:
732	while (nreqs)	1212	while (nreqs)
733	{	1213	{
734	poll_wait ();	1214	poll_wait ();
…		…
774	CODE:	1254	CODE:
775	RETVAL = nreqs;	1255	RETVAL = nreqs;
776	OUTPUT:	1256	OUTPUT:
777	RETVAL	1257	RETVAL
778		1258
		1259	PROTOTYPES: DISABLE
		1260
		1261	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1262
		1263	void
		1264	cancel (aio_req_ornot req)
		1265	PROTOTYPE:
		1266	CODE:
		1267	req_cancel (req);
		1268
		1269	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1270
		1271	void
		1272	add (aio_req grp, ...)
		1273	PPCODE:
		1274	{
		1275	int i;
		1276
		1277	if (grp->fd == 2)
		1278	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1279
		1280	for (i = 1; i < items; ++i )
		1281	{
		1282	if (GIMME_V != G_VOID)
		1283	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1284
		1285	aio_req req = SvAIO_REQ (ST (i));
		1286
		1287	if (req)
		1288	{
		1289	++grp->length;
		1290	req->grp = grp;
		1291
		1292	req->grp_prev = 0;
		1293	req->grp_next = grp->grp_first;
		1294
		1295	if (grp->grp_first)
		1296	grp->grp_first->grp_prev = req;
		1297
		1298	grp->grp_first = req;
		1299	}
		1300	}
		1301	}
		1302
		1303	void
		1304	result (aio_req grp, ...)
		1305	CODE:
		1306	{
		1307	int i;
		1308	AV *av = newAV ();
		1309
		1310	for (i = 1; i < items; ++i )
		1311	av_push (av, newSVsv (ST (i)));
		1312
		1313	SvREFCNT_dec (grp->data);
		1314	grp->data = (SV *)av;
		1315	}
		1316
		1317	void
		1318	feeder_limit (aio_req grp, int limit)
		1319	CODE:
		1320	grp->fd2 = limit;
		1321	aio_grp_feed (grp);
		1322
		1323	void
		1324	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)
		1325	CODE:
		1326	{
		1327	SvREFCNT_dec (grp->fh2);
		1328	grp->fh2 = newSVsv (callback);
		1329
		1330	if (grp->fd2 <= 0)
		1331	grp->fd2 = 2;
		1332
		1333	aio_grp_feed (grp);
		1334	}
		1335

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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 1.49 by root, Sun Oct 22 13:33:28 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 1.49 by root, Sun Oct 22 13:33:28 2006 UTC