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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.54 by root, Mon Oct 23 00:34:36 2006 UTC vs.
Revision 1.75 by root, Thu Oct 26 06:44:48 2006 UTC

…		…
		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux
		5	# define _GNU_SOURCE
		6	#endif
		7
1	#define _REENTRANT 1	8	#define _REENTRANT 1
		9
2	#include <errno.h>	10	#include <errno.h>
3		11
4	#include "EXTERN.h"	12	#include "EXTERN.h"
5	#include "perl.h"	13	#include "perl.h"
6	#include "XSUB.h"	14	#include "XSUB.h"
39	/* used for struct dirent, AIX doesn't provide it */	47	/* used for struct dirent, AIX doesn't provide it */
40	#ifndef NAME_MAX	48	#ifndef NAME_MAX
41	# define NAME_MAX 4096	49	# define NAME_MAX 4096
42	#endif	50	#endif
43		51
		52	#ifndef PTHREAD_STACK_MIN
		53	/* care for broken platforms, e.g. windows */
		54	# define PTHREAD_STACK_MIN 16384
		55	#endif
		56
44	#if __ia64	57	#if __ia64
45	# define STACKSIZE 65536	58	# define STACKSIZE 65536
		59	#elif __i386 \|\| __x86_64 /* 16k is unreasonably high :( */
		60	# define STACKSIZE PTHREAD_STACK_MIN
46	#else	61	#else
47	# define STACKSIZE 8192	62	# define STACKSIZE 16384
48	#endif	63	#endif
		64
		65	/* buffer size for various temporary buffers */
		66	#define AIO_BUFSIZE 65536
		67
		68	#define dBUF \
		69	char *aio_buf; \
		70	LOCK (wrklock); \
		71	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		72	UNLOCK (wrklock); \
		73	if (!aio_buf) \
		74	return -1;
49		75
50	enum {	76	enum {
51	REQ_QUIT,	77	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,	78	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	79	REQ_READ, REQ_WRITE, REQ_READAHEAD,
…		…
56	REQ_FSYNC, REQ_FDATASYNC,	82	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	83	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,	84	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,	85	REQ_LINK, REQ_SYMLINK,
60	REQ_GROUP, REQ_NOP,	86	REQ_GROUP, REQ_NOP,
61	REQ_SLEEP,	87	REQ_BUSY,
62	};	88	};
63		89
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	90	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	91	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		92
67	typedef struct aio_cb	93	typedef struct aio_cb
68	{	94	{
69	struct aio_cb *volatile next;	95	struct aio_cb *volatile next;
70
71	struct aio_cb grp, grp_prev, grp_next, grp_first;
72
73	SV self; / the perl counterpart of this request, if any */
74		96
75	SV data, callback;	97	SV data, callback;
76	SV fh, fh2;	98	SV fh, fh2;
77	void dataptr, data2ptr;	99	void dataptr, data2ptr;
78	Stat_t *statdata;	100	Stat_t *statdata;
79	off_t offset;	101	off_t offset;
80	size_t length;	102	size_t length;
81	ssize_t result;	103	ssize_t result;
82		104
		105	STRLEN dataoffset;
83	int type;	106	int type;
84	int fd, fd2;	107	int fd, fd2;
85	int errorno;	108	int errorno;
86	STRLEN dataoffset;
87	mode_t mode; /* open */	109	mode_t mode; /* open */
		110
88	unsigned char cancelled;	111	unsigned char flags;
		112	unsigned char pri;
		113
		114	SV self; / the perl counterpart of this request, if any */
		115	struct aio_cb grp, grp_prev, grp_next, grp_first;
89	} aio_cb;	116	} aio_cb;
		117
		118	enum {
		119	FLAG_CANCELLED = 0x01,
		120	};
90		121
91	typedef aio_cb *aio_req;	122	typedef aio_cb *aio_req;
92	typedef aio_cb *aio_req_ornot;	123	typedef aio_cb *aio_req_ornot;
93		124
		125	enum {
		126	PRI_MIN = -4,
		127	PRI_MAX = 4,
		128
		129	DEFAULT_PRI = 0,
		130	PRI_BIAS = -PRI_MIN,
		131	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		132	};
		133
		134	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		135
94	static int started, wanted;	136	static int started, wanted;
95	static volatile int nreqs;	137	static volatile int nreqs;
96	static int max_outstanding = 1<<30;
97	static int respipe [2];	138	static int respipe [2];
98		139
		140	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		141	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		142	#else
		143	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		144	#endif
		145
		146	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		147	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		148
		149	/* worker threasd management */
		150	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		151
		152	typedef struct worker {
		153	/* locked by wrklock */
		154	struct worker prev, next;
		155
		156	pthread_t tid;
		157
		158	/* locked by reslock, reqlock or wrklock */
		159	aio_req req; /* currently processed request */
		160	void *dbuf;
		161	DIR *dirp;
		162	} worker;
		163
		164	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		165
		166	static void worker_clear (worker *wrk)
		167	{
		168	if (wrk->dirp)
		169	{
		170	closedir (wrk->dirp);
		171	wrk->dirp = 0;
		172	}
		173
		174	if (wrk->dbuf)
		175	{
		176	free (wrk->dbuf);
		177	wrk->dbuf = 0;
		178	}
		179	}
		180
		181	static void worker_free (worker *wrk)
		182	{
		183	wrk->next->prev = wrk->prev;
		184	wrk->prev->next = wrk->next;
		185
		186	free (wrk);
		187	}
		188
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	189	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	190	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	191	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		192
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	193	/*
104	static volatile aio_req ress, rese; /* queue start, queue end */	194	* a somewhat faster data structure might be nice, but
		195	* with 8 priorities this actually needs <20 insns
		196	* per shift, the most expensive operation.
		197	*/
		198	typedef struct {
		199	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		200	int size;
		201	} reqq;
105		202
		203	static reqq req_queue;
		204	static reqq res_queue;
		205
		206	int reqq_push (reqq *q, aio_req req)
		207	{
		208	int pri = req->pri;
		209	req->next = 0;
		210
		211	if (q->qe[pri])
		212	{
		213	q->qe[pri]->next = req;
		214	q->qe[pri] = req;
		215	}
		216	else
		217	q->qe[pri] = q->qs[pri] = req;
		218
		219	return q->size++;
		220	}
		221
		222	aio_req reqq_shift (reqq *q)
		223	{
		224	int pri;
		225
		226	if (!q->size)
		227	return 0;
		228
		229	--q->size;
		230
		231	for (pri = NUM_PRI; pri--; )
		232	{
		233	aio_req req = q->qs[pri];
		234
		235	if (req)
		236	{
		237	if (!(q->qs[pri] = req->next))
		238	q->qe[pri] = 0;
		239
		240	return req;
		241	}
		242	}
		243
		244	abort ();
		245	}
		246
		247	static int poll_cb ();
106	static void req_invoke (aio_req req);	248	static void req_invoke (aio_req req);
107	static void req_free (aio_req req);	249	static void req_free (aio_req req);
		250	static void req_cancel (aio_req req);
108		251
109	/* must be called at most once */	252	/* must be called at most once */
110	static SV req_sv (aio_req req, const char klass)	253	static SV req_sv (aio_req req, const char klass)
111	{	254	{
112	if (!req->self)	255	if (!req->self)
…		…
130	return mg ? (aio_req)mg->mg_ptr : 0;	273	return mg ? (aio_req)mg->mg_ptr : 0;
131	}	274	}
132		275
133	static void aio_grp_feed (aio_req grp)	276	static void aio_grp_feed (aio_req grp)
134	{	277	{
135	while (grp->length < grp->fd2)	278	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
136	{	279	{
137	int old_len = grp->length;	280	int old_len = grp->length;
138		281
139	if (grp->fh2 && SvOK (grp->fh2))	282	if (grp->fh2 && SvOK (grp->fh2))
140	{	283	{
…		…
143	ENTER;	286	ENTER;
144	SAVETMPS;	287	SAVETMPS;
145	PUSHMARK (SP);	288	PUSHMARK (SP);
146	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	289	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
147	PUTBACK;	290	PUTBACK;
148	call_sv (grp->fh2, G_VOID \| G_EVAL);	291	call_sv (grp->fh2, G_VOID \| G_EVAL \| G_KEEPERR);
149	SPAGAIN;	292	SPAGAIN;
150	FREETMPS;	293	FREETMPS;
151	LEAVE;	294	LEAVE;
152	}	295	}
153		296
…		…
176	}	319	}
177	}	320	}
178		321
179	static void poll_wait ()	322	static void poll_wait ()
180	{	323	{
181	if (nreqs && !ress)
182	{
183	fd_set rfd;	324	fd_set rfd;
		325
		326	while (nreqs)
		327	{
		328	int size;
		329	#if !(__i386 \|\| __x86_64) /* safe without sempahore on these archs */
		330	LOCK (reslock);
		331	#endif
		332	size = res_queue.size;
		333	#if !(__i386 \|\| __x86_64) /* safe without sempahore on these archs */
		334	UNLOCK (reslock);
		335	#endif
		336
		337	if (size)
		338	return;
		339
184	FD_ZERO(&rfd);	340	FD_ZERO(&rfd);
185	FD_SET(respipe [0], &rfd);	341	FD_SET(respipe [0], &rfd);
186		342
187	select (respipe [0] + 1, &rfd, 0, 0, 0);	343	select (respipe [0] + 1, &rfd, 0, 0, 0);
188	}	344	}
189	}	345	}
190		346
191	static void req_invoke (aio_req req)	347	static void req_invoke (aio_req req)
192	{	348	{
193	dSP;	349	dSP;
194	int errorno = errno;
195		350
196	if (req->cancelled \|\| !SvOK (req->callback))	351	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
197	return;	352	{
198
199	errno = req->errorno;	353	errno = req->errorno;
200		354
201	ENTER;	355	ENTER;
202	SAVETMPS;	356	SAVETMPS;
203	PUSHMARK (SP);	357	PUSHMARK (SP);
204	EXTEND (SP, 1);	358	EXTEND (SP, 1);
205		359
206	switch (req->type)	360	switch (req->type)
207	{
208	case REQ_READDIR:
209	{	361	{
210	SV *rv = &PL_sv_undef;	362	case REQ_READDIR:
211
212	if (req->result >= 0)
213	{	363	{
214	char *buf = req->data2ptr;	364	SV *rv = &PL_sv_undef;
215	AV *av = newAV ();
216		365
217	while (req->result)	366	if (req->result >= 0)
218	{	367	{
		368	int i;
		369	char *buf = req->data2ptr;
		370	AV *av = newAV ();
		371
		372	av_extend (av, req->result - 1);
		373
		374	for (i = 0; i < req->result; ++i)
		375	{
219	SV *sv = newSVpv (buf, 0);	376	SV *sv = newSVpv (buf, 0);
220		377
221	av_push (av, sv);	378	av_store (av, i, sv);
222	buf += SvCUR (sv) + 1;	379	buf += SvCUR (sv) + 1;
223	req->result--;	380	}
		381
		382	rv = sv_2mortal (newRV_noinc ((SV *)av));
224	}	383	}
225		384
226	rv = sv_2mortal (newRV_noinc ((SV *)av));	385	PUSHs (rv);
227	}	386	}
		387	break;
228		388
229	PUSHs (rv);	389	case REQ_OPEN:
		390	{
		391	/* convert fd to fh */
		392	SV *fh;
		393
		394	PUSHs (sv_2mortal (newSViv (req->result)));
		395	PUTBACK;
		396	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		397	SPAGAIN;
		398
		399	fh = SvREFCNT_inc (POPs);
		400
		401	PUSHMARK (SP);
		402	XPUSHs (sv_2mortal (fh));
		403	}
		404	break;
		405
		406	case REQ_GROUP:
		407	req->fd = 2; /* mark group as finished */
		408
		409	if (req->data)
		410	{
		411	int i;
		412	AV av = (AV )req->data;
		413
		414	EXTEND (SP, AvFILL (av) + 1);
		415	for (i = 0; i <= AvFILL (av); ++i)
		416	PUSHs (*av_fetch (av, i, 0));
		417	}
		418	break;
		419
		420	case REQ_NOP:
		421	case REQ_BUSY:
		422	break;
		423
		424	default:
		425	PUSHs (sv_2mortal (newSViv (req->result)));
		426	break;
230	}	427	}
231	break;
232		428
233	case REQ_OPEN:
234	{
235	/* convert fd to fh */
236	SV *fh;
237		429
238	PUSHs (sv_2mortal (newSViv (req->result)));
239	PUTBACK;	430	PUTBACK;
240	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
241	SPAGAIN;
242
243	fh = SvREFCNT_inc (POPs);
244
245	PUSHMARK (SP);
246	XPUSHs (sv_2mortal (fh));
247	}
248	break;
249
250	case REQ_GROUP:
251	req->fd = 2; /* mark group as finished */
252
253	if (req->data)
254	{
255	int i;
256	AV av = (AV )req->data;
257
258	EXTEND (SP, AvFILL (av) + 1);
259	for (i = 0; i <= AvFILL (av); ++i)
260	PUSHs (*av_fetch (av, i, 0));
261	}
262	break;
263
264	case REQ_NOP:
265	case REQ_SLEEP:
266	break;
267
268	default:
269	PUSHs (sv_2mortal (newSViv (req->result)));
270	break;
271	}
272
273
274	PUTBACK;
275	call_sv (req->callback, G_VOID \| G_EVAL);	431	call_sv (req->callback, G_VOID \| G_EVAL);
276	SPAGAIN;	432	SPAGAIN;
277		433
278	FREETMPS;	434	FREETMPS;
279	LEAVE;	435	LEAVE;
280
281	errno = errorno;
282
283	if (SvTRUE (ERRSV))
284	{	436	}
285	req_free (req);
286	croak (0);
287	}
288	}
289		437
290	static void req_free (aio_req req)
291	{
292	if (req->grp)	438	if (req->grp)
293	{	439	{
294	aio_req grp = req->grp;	440	aio_req grp = req->grp;
295		441
296	/* unlink request */	442	/* unlink request */
…		…
301	grp->grp_first = req->grp_next;	447	grp->grp_first = req->grp_next;
302		448
303	aio_grp_dec (grp);	449	aio_grp_dec (grp);
304	}	450	}
305		451
		452	if (SvTRUE (ERRSV))
		453	{
		454	req_free (req);
		455	croak (0);
		456	}
		457	}
		458
		459	static void req_free (aio_req req)
		460	{
306	if (req->self)	461	if (req->self)
307	{	462	{
308	sv_unmagic (req->self, PERL_MAGIC_ext);	463	sv_unmagic (req->self, PERL_MAGIC_ext);
309	SvREFCNT_dec (req->self);	464	SvREFCNT_dec (req->self);
310	}	465	}
…		…
313	SvREFCNT_dec (req->fh);	468	SvREFCNT_dec (req->fh);
314	SvREFCNT_dec (req->fh2);	469	SvREFCNT_dec (req->fh2);
315	SvREFCNT_dec (req->callback);	470	SvREFCNT_dec (req->callback);
316	Safefree (req->statdata);	471	Safefree (req->statdata);
317		472
318	if (req->type == REQ_READDIR && req->result >= 0)	473	if (req->type == REQ_READDIR)
319	free (req->data2ptr);	474	free (req->data2ptr);
320		475
321	Safefree (req);	476	Safefree (req);
322	}	477	}
323		478
		479	static void req_cancel_subs (aio_req grp)
		480	{
		481	aio_req sub;
		482
		483	if (grp->type != REQ_GROUP)
		484	return;
		485
		486	SvREFCNT_dec (grp->fh2);
		487	grp->fh2 = 0;
		488
		489	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		490	req_cancel (sub);
		491	}
		492
324	static void req_cancel (aio_req req)	493	static void req_cancel (aio_req req)
325	{	494	{
326	req->cancelled = 1;	495	req->flags \|= FLAG_CANCELLED;
327		496
328	if (req->type == REQ_GROUP)	497	req_cancel_subs (req);
329	{
330	aio_req sub;
331
332	for (sub = req->grp_first; sub; sub = sub->grp_next)
333	req_cancel (sub);
334	}
335	}	498	}
336		499
337	static int poll_cb ()	500	static int poll_cb ()
338	{	501	{
339	dSP;	502	dSP;
…		…
341	int do_croak = 0;	504	int do_croak = 0;
342	aio_req req;	505	aio_req req;
343		506
344	for (;;)	507	for (;;)
345	{	508	{
346	pthread_mutex_lock (&reslock);	509	LOCK (reslock);
347	req = ress;	510	req = reqq_shift (&res_queue);
348		511
349	if (req)	512	if (req)
350	{	513	{
351	ress = req->next;
352
353	if (!ress)	514	if (!res_queue.size)
354	{	515	{
355	/* read any signals sent by the worker threads */	516	/* read any signals sent by the worker threads */
356	char buf [32];	517	char buf [32];
357	while (read (respipe [0], buf, 32) == 32)	518	while (read (respipe [0], buf, 32) == 32)
358	;	519	;
359
360	rese = 0;
361	}	520	}
362	}	521	}
363		522
364	pthread_mutex_unlock (&reslock);	523	UNLOCK (reslock);
365		524
366	if (!req)	525	if (!req)
367	break;	526	break;
368		527
369	--nreqs;	528	--nreqs;
…		…
404	static void aio_proc(void arg);	563	static void aio_proc(void arg);
405		564
406	static void start_thread (void)	565	static void start_thread (void)
407	{	566	{
408	sigset_t fullsigset, oldsigset;	567	sigset_t fullsigset, oldsigset;
409	pthread_t tid;
410	pthread_attr_t attr;	568	pthread_attr_t attr;
		569
		570	worker *wrk = calloc (1, sizeof (worker));
		571
		572	if (!wrk)
		573	croak ("unable to allocate worker thread data");
411		574
412	pthread_attr_init (&attr);	575	pthread_attr_init (&attr);
413	pthread_attr_setstacksize (&attr, STACKSIZE);	576	pthread_attr_setstacksize (&attr, STACKSIZE);
414	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	577	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
415		578
416	sigfillset (&fullsigset);	579	sigfillset (&fullsigset);
		580
		581	LOCK (wrklock);
417	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	582	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
418		583
419	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	584	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		585	{
		586	wrk->prev = &wrk_first;
		587	wrk->next = wrk_first.next;
		588	wrk_first.next->prev = wrk;
		589	wrk_first.next = wrk;
420	started++;	590	started++;
		591	}
		592	else
		593	free (wrk);
421		594
422	sigprocmask (SIG_SETMASK, &oldsigset, 0);	595	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		596	UNLOCK (wrklock);
423	}	597	}
424		598
425	static void req_send (aio_req req)	599	static void req_send (aio_req req)
426	{	600	{
427	while (started < wanted && nreqs >= started)	601	while (started < wanted && nreqs >= started)
428	start_thread ();	602	start_thread ();
429		603
430	++nreqs;	604	++nreqs;
431		605
432	pthread_mutex_lock (&reqlock);	606	LOCK (reqlock);
433		607	reqq_push (&req_queue, req);
434	req->next = 0;
435
436	if (reqe)
437	{
438	reqe->next = req;
439	reqe = req;
440	}
441	else
442	reqe = reqs = req;
443
444	pthread_cond_signal (&reqwait);	608	pthread_cond_signal (&reqwait);
445	pthread_mutex_unlock (&reqlock);	609	UNLOCK (reqlock);
446
447	if (nreqs > max_outstanding)
448	for (;;)
449	{
450	poll_cb ();
451
452	if (nreqs <= max_outstanding)
453	break;
454
455	poll_wait ();
456	}
457	}	610	}
458		611
459	static void end_thread (void)	612	static void end_thread (void)
460	{	613	{
461	aio_req req;	614	aio_req req;
		615
462	Newz (0, req, 1, aio_cb);	616	Newz (0, req, 1, aio_cb);
		617
463	req->type = REQ_QUIT;	618	req->type = REQ_QUIT;
		619	req->pri = PRI_MAX + PRI_BIAS;
464		620
465	req_send (req);	621	req_send (req);
466	}	622	}
467		623
468	static void min_parallel (int nthreads)	624	static void min_parallel (int nthreads)
…		…
520	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	676	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
521	{	677	{
522	ssize_t res;	678	ssize_t res;
523	off_t ooffset;	679	off_t ooffset;
524		680
525	pthread_mutex_lock (&preadwritelock);	681	LOCK (preadwritelock);
526	ooffset = lseek (fd, 0, SEEK_CUR);	682	ooffset = lseek (fd, 0, SEEK_CUR);
527	lseek (fd, offset, SEEK_SET);	683	lseek (fd, offset, SEEK_SET);
528	res = read (fd, buf, count);	684	res = read (fd, buf, count);
529	lseek (fd, ooffset, SEEK_SET);	685	lseek (fd, ooffset, SEEK_SET);
530	pthread_mutex_unlock (&preadwritelock);	686	UNLOCK (preadwritelock);
531		687
532	return res;	688	return res;
533	}	689	}
534		690
535	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	691	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
536	{	692	{
537	ssize_t res;	693	ssize_t res;
538	off_t ooffset;	694	off_t ooffset;
539		695
540	pthread_mutex_lock (&preadwritelock);	696	LOCK (preadwritelock);
541	ooffset = lseek (fd, 0, SEEK_CUR);	697	ooffset = lseek (fd, 0, SEEK_CUR);
542	lseek (fd, offset, SEEK_SET);	698	lseek (fd, offset, SEEK_SET);
543	res = write (fd, buf, count);	699	res = write (fd, buf, count);
544	lseek (fd, offset, SEEK_SET);	700	lseek (fd, offset, SEEK_SET);
545	pthread_mutex_unlock (&preadwritelock);	701	UNLOCK (preadwritelock);
546		702
547	return res;	703	return res;
548	}	704	}
549	#endif	705	#endif
550		706
551	#if !HAVE_FDATASYNC	707	#if !HAVE_FDATASYNC
552	# define fdatasync fsync	708	# define fdatasync fsync
553	#endif	709	#endif
554		710
555	#if !HAVE_READAHEAD	711	#if !HAVE_READAHEAD
556	# define readahead aio_readahead	712	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
557		713
558	static ssize_t readahead (int fd, off_t offset, size_t count)	714	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
559	{	715	{
560	char readahead_buf[4096];	716	dBUF;
561		717
562	while (count > 0)	718	while (count > 0)
563	{	719	{
564	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	720	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
565		721
566	pread (fd, readahead_buf, len, offset);	722	pread (fd, aio_buf, len, offset);
567	offset += len;	723	offset += len;
568	count -= len;	724	count -= len;
569	}	725	}
570		726
571	errno = 0;	727	errno = 0;
572	}	728	}
		729
573	#endif	730	#endif
574		731
575	#if !HAVE_READDIR_R	732	#if !HAVE_READDIR_R
576	# define readdir_r aio_readdir_r	733	# define readdir_r aio_readdir_r
577		734
…		…
580	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)	737	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
581	{	738	{
582	struct dirent *e;	739	struct dirent *e;
583	int errorno;	740	int errorno;
584		741
585	pthread_mutex_lock (&readdirlock);	742	LOCK (readdirlock);
586		743
587	e = readdir (dirp);	744	e = readdir (dirp);
588	errorno = errno;	745	errorno = errno;
589		746
590	if (e)	747	if (e)
…		…
593	strcpy (ent->d_name, e->d_name);	750	strcpy (ent->d_name, e->d_name);
594	}	751	}
595	else	752	else
596	*res = 0;	753	*res = 0;
597		754
598	pthread_mutex_unlock (&readdirlock);	755	UNLOCK (readdirlock);
599		756
600	errno = errorno;	757	errno = errorno;
601	return e ? 0 : -1;	758	return e ? 0 : -1;
602	}	759	}
603	#endif	760	#endif
604		761
605	/* sendfile always needs emulation */	762	/* sendfile always needs emulation */
606	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	763	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
607	{	764	{
608	ssize_t res;	765	ssize_t res;
609		766
610	if (!count)	767	if (!count)
611	return 0;	768	return 0;
…		…
660	#endif	817	#endif
661	)	818	)
662	)	819	)
663	{	820	{
664	/* emulate sendfile. this is a major pain in the ass */	821	/* emulate sendfile. this is a major pain in the ass */
665	char buf[4096];	822	dBUF;
		823
666	res = 0;	824	res = 0;
667		825
668	while (count)	826	while (count)
669	{	827	{
670	ssize_t cnt;	828	ssize_t cnt;
671		829
672	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	830	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
673		831
674	if (cnt <= 0)	832	if (cnt <= 0)
675	{	833	{
676	if (cnt && !res) res = -1;	834	if (cnt && !res) res = -1;
677	break;	835	break;
678	}	836	}
679		837
680	cnt = write (ofd, buf, cnt);	838	cnt = write (ofd, aio_buf, cnt);
681		839
682	if (cnt <= 0)	840	if (cnt <= 0)
683	{	841	{
684	if (cnt && !res) res = -1;	842	if (cnt && !res) res = -1;
685	break;	843	break;
…		…
693		851
694	return res;	852	return res;
695	}	853	}
696		854
697	/* read a full directory */	855	/* read a full directory */
698	static int scandir_ (const char path, void *namesp)	856	static void scandir_ (aio_req req, worker *self)
699	{	857	{
700	DIR *dirp = opendir (path);	858	DIR *dirp;
701	union	859	union
702	{	860	{
703	struct dirent d;	861	struct dirent d;
704	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	862	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
705	} u;	863	} *u;
706	struct dirent *entp;	864	struct dirent *entp;
707	char name, names;	865	char name, names;
708	int memlen = 4096;	866	int memlen = 4096;
709	int memofs = 0;	867	int memofs = 0;
710	int res = 0;	868	int res = 0;
711	int errorno;	869	int errorno;
712		870
713	if (!dirp)	871	LOCK (wrklock);
714	return -1;	872	self->dirp = dirp = opendir (req->dataptr);
		873	self->dbuf = u = malloc (sizeof (*u));
		874	UNLOCK (wrklock);
715		875
716	names = malloc (memlen);	876	req->data2ptr = names = malloc (memlen);
717		877
		878	if (dirp && u && names)
718	for (;;)	879	for (;;)
719	{	880	{
		881	errno = 0;
720	errno = 0, readdir_r (dirp, &u.d, &entp);	882	readdir_r (dirp, &u->d, &entp);
721		883
722	if (!entp)	884	if (!entp)
723	break;	885	break;
724		886
725	name = entp->d_name;	887	name = entp->d_name;
726		888
727	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))	889	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
728	{	890	{
729	int len = strlen (name) + 1;	891	int len = strlen (name) + 1;
730		892
731	res++;	893	res++;
732		894
733	while (memofs + len > memlen)	895	while (memofs + len > memlen)
734	{	896	{
735	memlen *= 2;	897	memlen *= 2;
		898	LOCK (wrklock);
736	names = realloc (names, memlen);	899	req->data2ptr = names = realloc (names, memlen);
		900	UNLOCK (wrklock);
		901
737	if (!names)	902	if (!names)
738	break;	903	break;
739	}	904	}
740		905
741	memcpy (names + memofs, name, len);	906	memcpy (names + memofs, name, len);
742	memofs += len;	907	memofs += len;
743	}	908	}
744	}	909	}
745		910
746	errorno = errno;
747	closedir (dirp);
748
749	if (errorno)	911	if (errno)
750	{
751	free (names);
752	errno = errorno;
753	res = -1;	912	res = -1;
754	}	913
755		914	req->result = res;
756	namesp = (void )names;
757	return res;
758	}	915	}
759		916
760	/*****************************************************************************/	917	/*****************************************************************************/
761		918
762	static void aio_proc (void thr_arg)	919	static void aio_proc (void thr_arg)
763	{	920	{
764	aio_req req;	921	aio_req req;
765	int type;	922	int type;
		923	worker self = (worker )thr_arg;
766		924
767	do	925	do
768	{	926	{
769	pthread_mutex_lock (&reqlock);	927	LOCK (reqlock);
770		928
771	for (;;)	929	for (;;)
772	{	930	{
773	req = reqs;	931	self->req = req = reqq_shift (&req_queue);
774
775	if (reqs)
776	{
777	reqs = reqs->next;
778	if (!reqs) reqe = 0;
779	}
780		932
781	if (req)	933	if (req)
782	break;	934	break;
783		935
784	pthread_cond_wait (&reqwait, &reqlock);	936	pthread_cond_wait (&reqwait, &reqlock);
785	}	937	}
786		938
787	pthread_mutex_unlock (&reqlock);	939	UNLOCK (reqlock);
788		940
789	errno = 0; /* strictly unnecessary */	941	errno = 0; /* strictly unnecessary */
790
791	if (!req->cancelled)
792	switch (type = req->type) /* remember type for QUIT check */	942	type = req->type; /* remember type for QUIT check */
		943
		944	if (!(req->flags & FLAG_CANCELLED))
		945	switch (type)
793	{	946	{
794	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	947	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
795	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	948	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
796		949
797	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	950	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
798	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	951	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
799		952
800	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	953	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
801	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	954	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
802	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	955	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
803		956
…		…
809	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	962	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
810	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	963	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
811		964
812	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	965	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
813	case REQ_FSYNC: req->result = fsync (req->fd); break;	966	case REQ_FSYNC: req->result = fsync (req->fd); break;
814	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	967	case REQ_READDIR: scandir_ (req, self); break;
815		968
816	case REQ_SLEEP:	969	case REQ_BUSY:
817	{	970	{
818	struct timeval tv;	971	struct timeval tv;
819		972
820	tv.tv_sec = req->fd;	973	tv.tv_sec = req->fd;
821	tv.tv_usec = req->fd2;	974	tv.tv_usec = req->fd2;
822		975
823	req->result = select (0, 0, 0, 0, &tv);	976	req->result = select (0, 0, 0, 0, &tv);
824	}	977	}
825		978
826	case REQ_GROUP: /TODO: should not be handled here /	979	case REQ_GROUP:
827	case REQ_NOP: /TODO: should not be handled here /	980	case REQ_NOP:
828	case REQ_QUIT:	981	case REQ_QUIT:
829	break;	982	break;
830		983
831	default:	984	default:
832	req->result = ENOSYS;	985	req->result = ENOSYS;
833	break;	986	break;
834	}	987	}
835		988
836	req->errorno = errno;	989	req->errorno = errno;
837		990
838	pthread_mutex_lock (&reslock);	991	LOCK (reslock);
839		992
840	req->next = 0;	993	if (!reqq_push (&res_queue, req))
841
842	if (rese)
843	{
844	rese->next = req;
845	rese = req;
846	}
847	else
848	{
849	rese = ress = req;
850
851	/* write a dummy byte to the pipe so fh becomes ready */	994	/* write a dummy byte to the pipe so fh becomes ready */
852	write (respipe [1], &respipe, 1);	995	write (respipe [1], &respipe, 1);
853	}
854		996
855	pthread_mutex_unlock (&reslock);	997	self->req = 0;
		998	worker_clear (self);
		999
		1000	UNLOCK (reslock);
856	}	1001	}
857	while (type != REQ_QUIT);	1002	while (type != REQ_QUIT);
858		1003
		1004	LOCK (wrklock);
		1005	worker_free (self);
		1006	UNLOCK (wrklock);
		1007
859	return 0;	1008	return 0;
860	}	1009	}
861		1010
862	/*****************************************************************************/	1011	/*****************************************************************************/
863		1012
864	static void atfork_prepare (void)	1013	static void atfork_prepare (void)
865	{	1014	{
866	pthread_mutex_lock (&reqlock);	1015	LOCK (wrklock);
867	pthread_mutex_lock (&reslock);	1016	LOCK (reqlock);
		1017	LOCK (reslock);
868	#if !HAVE_PREADWRITE	1018	#if !HAVE_PREADWRITE
869	pthread_mutex_lock (&preadwritelock);	1019	LOCK (preadwritelock);
870	#endif	1020	#endif
871	#if !HAVE_READDIR_R	1021	#if !HAVE_READDIR_R
872	pthread_mutex_lock (&readdirlock);	1022	LOCK (readdirlock);
873	#endif	1023	#endif
874	}	1024	}
875		1025
876	static void atfork_parent (void)	1026	static void atfork_parent (void)
877	{	1027	{
878	#if !HAVE_READDIR_R	1028	#if !HAVE_READDIR_R
879	pthread_mutex_unlock (&readdirlock);	1029	UNLOCK (readdirlock);
880	#endif	1030	#endif
881	#if !HAVE_PREADWRITE	1031	#if !HAVE_PREADWRITE
882	pthread_mutex_unlock (&preadwritelock);	1032	UNLOCK (preadwritelock);
883	#endif	1033	#endif
884	pthread_mutex_unlock (&reslock);	1034	UNLOCK (reslock);
885	pthread_mutex_unlock (&reqlock);	1035	UNLOCK (reqlock);
		1036	UNLOCK (wrklock);
886	}	1037	}
887		1038
888	static void atfork_child (void)	1039	static void atfork_child (void)
889	{	1040	{
890	aio_req prv;	1041	aio_req prv;
891		1042
		1043	while (prv = reqq_shift (&req_queue))
		1044	req_free (prv);
		1045
		1046	while (prv = reqq_shift (&res_queue))
		1047	req_free (prv);
		1048
		1049	while (wrk_first.next != &wrk_first)
		1050	{
		1051	worker *wrk = wrk_first.next;
		1052
		1053	if (wrk->req)
		1054	req_free (wrk->req);
		1055
		1056	worker_clear (wrk);
		1057	worker_free (wrk);
		1058	}
		1059
892	started = 0;	1060	started = 0;
893		1061	nreqs = 0;
894	while (reqs)
895	{
896	prv = reqs;
897	reqs = prv->next;
898	req_free (prv);
899	}
900
901	reqs = reqe = 0;
902
903	while (ress)
904	{
905	prv = ress;
906	ress = prv->next;
907	req_free (prv);
908	}
909
910	ress = rese = 0;
911		1062
912	close (respipe [0]);	1063	close (respipe [0]);
913	close (respipe [1]);	1064	close (respipe [1]);
914	create_pipe ();	1065	create_pipe ();
915		1066
916	atfork_parent ();	1067	atfork_parent ();
917	}	1068	}
918		1069
919	#define dREQ \	1070	#define dREQ \
920	aio_req req; \	1071	aio_req req; \
		1072	int req_pri = next_pri; \
		1073	next_pri = DEFAULT_PRI + PRI_BIAS; \
921	\	1074	\
922	if (SvOK (callback) && !SvROK (callback)) \	1075	if (SvOK (callback) && !SvROK (callback)) \
923	croak ("callback must be undef or of reference type"); \	1076	croak ("callback must be undef or of reference type"); \
924	\	1077	\
925	Newz (0, req, 1, aio_cb); \	1078	Newz (0, req, 1, aio_cb); \
926	if (!req) \	1079	if (!req) \
927	croak ("out of memory during aio_req allocation"); \	1080	croak ("out of memory during aio_req allocation"); \
928	\	1081	\
929	req->callback = newSVsv (callback)	1082	req->callback = newSVsv (callback); \
		1083	req->pri = req_pri
930		1084
931	#define REQ_SEND \	1085	#define REQ_SEND \
932	req_send (req); \	1086	req_send (req); \
933	\	1087	\
934	if (GIMME_V != G_VOID) \	1088	if (GIMME_V != G_VOID) \
…		…
956		1110
957	void	1111	void
958	max_parallel (nthreads)	1112	max_parallel (nthreads)
959	int nthreads	1113	int nthreads
960	PROTOTYPE: $	1114	PROTOTYPE: $
961
962	int
963	max_outstanding (nreqs)
964	int nreqs
965	PROTOTYPE: $
966	CODE:
967	RETVAL = max_outstanding;
968	max_outstanding = nreqs;
969		1115
970	void	1116	void
971	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1117	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
972	SV * pathname	1118	SV * pathname
973	int flags	1119	int flags
…		…
1188		1334
1189	REQ_SEND;	1335	REQ_SEND;
1190	}	1336	}
1191		1337
1192	void	1338	void
1193	aio_sleep (delay,callback=&PL_sv_undef)	1339	aio_busy (delay,callback=&PL_sv_undef)
1194	double delay	1340	double delay
1195	SV * callback	1341	SV * callback
1196	PPCODE:	1342	PPCODE:
1197	{	1343	{
1198	dREQ;	1344	dREQ;
1199		1345
1200	req->type = REQ_SLEEP;	1346	req->type = REQ_BUSY;
1201	req->fd = delay < 0. ? 0 : delay;	1347	req->fd = delay < 0. ? 0 : delay;
1202	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1348	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1203		1349
1204	REQ_SEND;	1350	REQ_SEND;
1205	}	1351	}
…		…
1209	SV * callback	1355	SV * callback
1210	PROTOTYPE: ;$	1356	PROTOTYPE: ;$
1211	PPCODE:	1357	PPCODE:
1212	{	1358	{
1213	dREQ;	1359	dREQ;
		1360
1214	req->type = REQ_GROUP;	1361	req->type = REQ_GROUP;
1215	req_send (req);	1362	req_send (req);
		1363
1216	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1364	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1217	}	1365	}
1218		1366
1219	void	1367	void
1220	aio_nop (callback=&PL_sv_undef)	1368	aio_nop (callback=&PL_sv_undef)
…		…
1225		1373
1226	req->type = REQ_NOP;	1374	req->type = REQ_NOP;
1227		1375
1228	REQ_SEND;	1376	REQ_SEND;
1229	}	1377	}
		1378
		1379	void
		1380	aioreq_pri (int pri = DEFAULT_PRI)
		1381	CODE:
		1382	if (pri < PRI_MIN) pri = PRI_MIN;
		1383	if (pri > PRI_MAX) pri = PRI_MAX;
		1384	next_pri = pri + PRI_BIAS;
		1385
		1386	void
		1387	aioreq_nice (int nice = 0)
		1388	CODE:
		1389	nice = next_pri - nice;
		1390	if (nice < PRI_MIN) nice = PRI_MIN;
		1391	if (nice > PRI_MAX) nice = PRI_MAX;
		1392	next_pri = nice + PRI_BIAS;
1230		1393
1231	void	1394	void
1232	flush ()	1395	flush ()
1233	PROTOTYPE:	1396	PROTOTYPE:
1234	CODE:	1397	CODE:
…		…
1283		1446
1284	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1447	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1285		1448
1286	void	1449	void
1287	cancel (aio_req_ornot req)	1450	cancel (aio_req_ornot req)
1288	PROTOTYPE:
1289	CODE:	1451	CODE:
1290	req_cancel (req);	1452	req_cancel (req);
		1453
		1454	void
		1455	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1456	CODE:
		1457	SvREFCNT_dec (req->callback);
		1458	req->callback = newSVsv (callback);
1291		1459
1292	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1460	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1293		1461
1294	void	1462	void
1295	add (aio_req grp, ...)	1463	add (aio_req grp, ...)
…		…
1323	}	1491	}
1324	}	1492	}
1325	}	1493	}
1326		1494
1327	void	1495	void
		1496	cancel_subs (aio_req_ornot req)
		1497	CODE:
		1498	req_cancel_subs (req);
		1499
		1500	void
1328	result (aio_req grp, ...)	1501	result (aio_req grp, ...)
1329	CODE:	1502	CODE:
1330	{	1503	{
1331	int i;	1504	int i;
1332	AV *av = newAV ();	1505	AV *av = newAV ();
…		…
1337	SvREFCNT_dec (grp->data);	1510	SvREFCNT_dec (grp->data);
1338	grp->data = (SV *)av;	1511	grp->data = (SV *)av;
1339	}	1512	}
1340		1513
1341	void	1514	void
1342	lock (aio_req grp)
1343	CODE:
1344	++grp->length;
1345
1346	void
1347	unlock (aio_req grp)
1348	CODE:
1349	aio_grp_dec (grp);
1350
1351	void
1352	feeder_limit (aio_req grp, int limit)	1515	limit (aio_req grp, int limit)
1353	CODE:	1516	CODE:
1354	grp->fd2 = limit;	1517	grp->fd2 = limit;
1355	aio_grp_feed (grp);	1518	aio_grp_feed (grp);
1356		1519
1357	void	1520	void
1358	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)	1521	feed (aio_req grp, SV *callback=&PL_sv_undef)
1359	CODE:	1522	CODE:
1360	{	1523	{
1361	SvREFCNT_dec (grp->fh2);	1524	SvREFCNT_dec (grp->fh2);
1362	grp->fh2 = newSVsv (callback);	1525	grp->fh2 = newSVsv (callback);
1363		1526

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.54 by root, Mon Oct 23 00:34:36 2006 UTC vs. Revision 1.75 by root, Thu Oct 26 06:44:48 2006 UTC

Diff Legend

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.54 by root, Mon Oct 23 00:34:36 2006 UTC vs.
Revision 1.75 by root, Thu Oct 26 06:44:48 2006 UTC