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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.53 by root, Mon Oct 23 00:17:07 2006 UTC vs.
Revision 1.71 by root, Tue Oct 24 16:35:04 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"
41	# define NAME_MAX 4096	49	# define NAME_MAX 4096
42	#endif	50	#endif
43		51
44	#if __ia64	52	#if __ia64
45	# define STACKSIZE 65536	53	# define STACKSIZE 65536
		54	#elif __i386 \|\| __x86_64 /* 16k is unreasonably high :( */
		55	# define STACKSIZE PTHREAD_STACK_MIN
46	#else	56	#else
47	# define STACKSIZE 8192	57	# define STACKSIZE 16384
48	#endif	58	#endif
		59
		60	/* buffer size for various temporary buffers */
		61	#define AIO_BUFSIZE 65536
		62
		63	#define dBUF \
		64	char *aio_buf; \
		65	LOCK (wrklock); \
		66	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		67	UNLOCK (wrklock); \
		68	if (!aio_buf) \
		69	return -1;
49		70
50	enum {	71	enum {
51	REQ_QUIT,	72	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,	73	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	74	REQ_READ, REQ_WRITE, REQ_READAHEAD,
…		…
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,	77	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	78	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,	79	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,	80	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,	81	REQ_GROUP, REQ_NOP,
61	REQ_GROUP,	82	REQ_BUSY,
62	};	83	};
63		84
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	85	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	86	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		87
67	typedef struct aio_cb	88	typedef struct aio_cb
68	{	89	{
69	struct aio_cb *volatile next;	90	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		91
75	SV data, callback;	92	SV data, callback;
76	SV fh, fh2;	93	SV fh, fh2;
77	void dataptr, data2ptr;	94	void dataptr, data2ptr;
78	Stat_t *statdata;	95	Stat_t *statdata;
79	off_t offset;	96	off_t offset;
80	size_t length;	97	size_t length;
81	ssize_t result;	98	ssize_t result;
82		99
		100	STRLEN dataoffset;
83	int type;	101	int type;
84	int fd, fd2;	102	int fd, fd2;
85	int errorno;	103	int errorno;
86	STRLEN dataoffset;
87	mode_t mode; /* open */	104	mode_t mode; /* open */
		105
88	unsigned char cancelled;	106	unsigned char flags;
		107	unsigned char pri;
		108
		109	SV self; / the perl counterpart of this request, if any */
		110	struct aio_cb grp, grp_prev, grp_next, grp_first;
89	} aio_cb;	111	} aio_cb;
		112
		113	enum {
		114	FLAG_CANCELLED = 0x01,
		115	};
90		116
91	typedef aio_cb *aio_req;	117	typedef aio_cb *aio_req;
92	typedef aio_cb *aio_req_ornot;	118	typedef aio_cb *aio_req_ornot;
		119
		120	enum {
		121	PRI_MIN = -4,
		122	PRI_MAX = 4,
		123
		124	DEFAULT_PRI = 0,
		125	PRI_BIAS = -PRI_MIN,
		126	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		127	};
		128
		129	static int next_pri = DEFAULT_PRI + PRI_BIAS;
93		130
94	static int started, wanted;	131	static int started, wanted;
95	static volatile int nreqs;	132	static volatile int nreqs;
96	static int max_outstanding = 1<<30;	133	static int max_outstanding = 1<<30;
97	static int respipe [2];	134	static int respipe [2];
98		135
		136	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		137	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		138	#else
		139	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		140	#endif
		141
		142	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		143	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		144
		145	/* worker threasd management */
		146	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		147
		148	typedef struct worker {
		149	/* locked by wrklock */
		150	struct worker prev, next;
		151
		152	pthread_t tid;
		153
		154	/* locked by reslock, reqlock or wrklock */
		155	aio_req req; /* currently processed request */
		156	void *dbuf;
		157	DIR *dirp;
		158	} worker;
		159
		160	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		161
		162	static void worker_clear (worker *wrk)
		163	{
		164	if (wrk->dirp)
		165	{
		166	closedir (wrk->dirp);
		167	wrk->dirp = 0;
		168	}
		169
		170	if (wrk->dbuf)
		171	{
		172	free (wrk->dbuf);
		173	wrk->dbuf = 0;
		174	}
		175	}
		176
		177	static void worker_free (worker *wrk)
		178	{
		179	wrk->next->prev = wrk->prev;
		180	wrk->prev->next = wrk->next;
		181
		182	free (wrk);
		183	}
		184
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	185	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	186	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	187	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		188
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	189	/*
104	static volatile aio_req ress, rese; /* queue start, queue end */	190	* a somewhat faster data structure might be nice, but
		191	* with 8 priorities this actually needs <20 insns
		192	* per shift, the most expensive operation.
		193	*/
		194	typedef struct {
		195	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		196	int size;
		197	} reqq;
		198
		199	static reqq req_queue;
		200	static reqq res_queue;
		201
		202	int reqq_push (reqq *q, aio_req req)
		203	{
		204	int pri = req->pri;
		205	req->next = 0;
		206
		207	if (q->qe[pri])
		208	{
		209	q->qe[pri]->next = req;
		210	q->qe[pri] = req;
		211	}
		212	else
		213	q->qe[pri] = q->qs[pri] = req;
		214
		215	return q->size++;
		216	}
		217
		218	aio_req reqq_shift (reqq *q)
		219	{
		220	int pri;
		221
		222	if (!q->size)
		223	return 0;
		224
		225	--q->size;
		226
		227	for (pri = NUM_PRI; pri--; )
		228	{
		229	aio_req req = q->qs[pri];
		230
		231	if (req)
		232	{
		233	if (!(q->qs[pri] = req->next))
		234	q->qe[pri] = 0;
		235
		236	return req;
		237	}
		238	}
		239
		240	abort ();
		241	}
105		242
106	static void req_invoke (aio_req req);	243	static void req_invoke (aio_req req);
107	static void req_free (aio_req req);	244	static void req_free (aio_req req);
108		245
109	/* must be called at most once */	246	/* must be called at most once */
…		…
130	return mg ? (aio_req)mg->mg_ptr : 0;	267	return mg ? (aio_req)mg->mg_ptr : 0;
131	}	268	}
132		269
133	static void aio_grp_feed (aio_req grp)	270	static void aio_grp_feed (aio_req grp)
134	{	271	{
135	while (grp->length < grp->fd2)	272	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
136	{	273	{
137	int old_len = grp->length;	274	int old_len = grp->length;
138		275
139	if (grp->fh2 && SvOK (grp->fh2))	276	if (grp->fh2 && SvOK (grp->fh2))
140	{	277	{
…		…
143	ENTER;	280	ENTER;
144	SAVETMPS;	281	SAVETMPS;
145	PUSHMARK (SP);	282	PUSHMARK (SP);
146	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	283	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
147	PUTBACK;	284	PUTBACK;
148	call_sv (grp->fh2, G_VOID \| G_EVAL);	285	call_sv (grp->fh2, G_VOID \| G_EVAL \| G_KEEPERR);
149	SPAGAIN;	286	SPAGAIN;
150	FREETMPS;	287	FREETMPS;
151	LEAVE;	288	LEAVE;
152	}	289	}
153		290
…		…
176	}	313	}
177	}	314	}
178		315
179	static void poll_wait ()	316	static void poll_wait ()
180	{	317	{
181	if (nreqs && !ress)
182	{
183	fd_set rfd;	318	fd_set rfd;
		319
		320	while (nreqs)
		321	{
		322	int size;
		323	#if !(__i386 \|\| __x86_64) /* safe without sempahore on these archs */
		324	LOCK (reslock);
		325	#endif
		326	size = res_queue.size;
		327	#if !(__i386 \|\| __x86_64) /* safe without sempahore on these archs */
		328	UNLOCK (reslock);
		329	#endif
		330
		331	if (size)
		332	return;
		333
184	FD_ZERO(&rfd);	334	FD_ZERO(&rfd);
185	FD_SET(respipe [0], &rfd);	335	FD_SET(respipe [0], &rfd);
186		336
187	select (respipe [0] + 1, &rfd, 0, 0, 0);	337	select (respipe [0] + 1, &rfd, 0, 0, 0);
188	}	338	}
189	}	339	}
190		340
191	static void req_invoke (aio_req req)	341	static void req_invoke (aio_req req)
192	{	342	{
193	dSP;	343	dSP;
194	int errorno = errno;
195		344
196	if (req->cancelled \|\| !SvOK (req->callback))	345	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
197	return;	346	{
198
199	errno = req->errorno;	347	errno = req->errorno;
200		348
201	ENTER;	349	ENTER;
202	SAVETMPS;	350	SAVETMPS;
203	PUSHMARK (SP);	351	PUSHMARK (SP);
204	EXTEND (SP, 1);	352	EXTEND (SP, 1);
205		353
206	switch (req->type)	354	switch (req->type)
207	{
208	case REQ_READDIR:
209	{	355	{
210	SV *rv = &PL_sv_undef;	356	case REQ_READDIR:
211
212	if (req->result >= 0)
213	{	357	{
214	char *buf = req->data2ptr;	358	SV *rv = &PL_sv_undef;
215	AV *av = newAV ();
216		359
217	while (req->result)	360	if (req->result >= 0)
218	{	361	{
		362	int i;
		363	char *buf = req->data2ptr;
		364	AV *av = newAV ();
		365
		366	av_extend (av, req->result - 1);
		367
		368	for (i = 0; i < req->result; ++i)
		369	{
219	SV *sv = newSVpv (buf, 0);	370	SV *sv = newSVpv (buf, 0);
220		371
221	av_push (av, sv);	372	av_store (av, i, sv);
222	buf += SvCUR (sv) + 1;	373	buf += SvCUR (sv) + 1;
223	req->result--;	374	}
		375
		376	rv = sv_2mortal (newRV_noinc ((SV *)av));
224	}	377	}
225		378
226	rv = sv_2mortal (newRV_noinc ((SV *)av));	379	PUSHs (rv);
227	}	380	}
		381	break;
228		382
229	PUSHs (rv);	383	case REQ_OPEN:
		384	{
		385	/* convert fd to fh */
		386	SV *fh;
		387
		388	PUSHs (sv_2mortal (newSViv (req->result)));
		389	PUTBACK;
		390	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		391	SPAGAIN;
		392
		393	fh = SvREFCNT_inc (POPs);
		394
		395	PUSHMARK (SP);
		396	XPUSHs (sv_2mortal (fh));
		397	}
		398	break;
		399
		400	case REQ_GROUP:
		401	req->fd = 2; /* mark group as finished */
		402
		403	if (req->data)
		404	{
		405	int i;
		406	AV av = (AV )req->data;
		407
		408	EXTEND (SP, AvFILL (av) + 1);
		409	for (i = 0; i <= AvFILL (av); ++i)
		410	PUSHs (*av_fetch (av, i, 0));
		411	}
		412	break;
		413
		414	case REQ_NOP:
		415	case REQ_BUSY:
		416	break;
		417
		418	default:
		419	PUSHs (sv_2mortal (newSViv (req->result)));
		420	break;
230	}	421	}
231	break;
232		422
233	case REQ_OPEN:
234	{
235	/* convert fd to fh */
236	SV *fh;
237		423
238	PUSHs (sv_2mortal (newSViv (req->result)));
239	PUTBACK;	424	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_SLEEP:
265	break;
266
267	default:
268	PUSHs (sv_2mortal (newSViv (req->result)));
269	break;
270	}
271
272
273	PUTBACK;
274	call_sv (req->callback, G_VOID \| G_EVAL);	425	call_sv (req->callback, G_VOID \| G_EVAL);
275	SPAGAIN;	426	SPAGAIN;
276		427
277	FREETMPS;	428	FREETMPS;
278	LEAVE;	429	LEAVE;
279
280	errno = errorno;
281
282	if (SvTRUE (ERRSV))
283	{	430	}
284	req_free (req);
285	croak (0);
286	}
287	}
288		431
289	static void req_free (aio_req req)
290	{
291	if (req->grp)	432	if (req->grp)
292	{	433	{
293	aio_req grp = req->grp;	434	aio_req grp = req->grp;
294		435
295	/* unlink request */	436	/* unlink request */
…		…
300	grp->grp_first = req->grp_next;	441	grp->grp_first = req->grp_next;
301		442
302	aio_grp_dec (grp);	443	aio_grp_dec (grp);
303	}	444	}
304		445
		446	if (SvTRUE (ERRSV))
		447	{
		448	req_free (req);
		449	croak (0);
		450	}
		451	}
		452
		453	static void req_free (aio_req req)
		454	{
305	if (req->self)	455	if (req->self)
306	{	456	{
307	sv_unmagic (req->self, PERL_MAGIC_ext);	457	sv_unmagic (req->self, PERL_MAGIC_ext);
308	SvREFCNT_dec (req->self);	458	SvREFCNT_dec (req->self);
309	}	459	}
…		…
312	SvREFCNT_dec (req->fh);	462	SvREFCNT_dec (req->fh);
313	SvREFCNT_dec (req->fh2);	463	SvREFCNT_dec (req->fh2);
314	SvREFCNT_dec (req->callback);	464	SvREFCNT_dec (req->callback);
315	Safefree (req->statdata);	465	Safefree (req->statdata);
316		466
317	if (req->type == REQ_READDIR && req->result >= 0)	467	if (req->type == REQ_READDIR)
318	free (req->data2ptr);	468	free (req->data2ptr);
319		469
320	Safefree (req);	470	Safefree (req);
321	}	471	}
322		472
323	static void req_cancel (aio_req req)	473	static void req_cancel (aio_req req)
324	{	474	{
325	req->cancelled = 1;	475	req->flags \|= FLAG_CANCELLED;
326		476
327	if (req->type == REQ_GROUP)	477	if (req->type == REQ_GROUP)
328	{	478	{
329	aio_req sub;	479	aio_req sub;
330		480
…		…
340	int do_croak = 0;	490	int do_croak = 0;
341	aio_req req;	491	aio_req req;
342		492
343	for (;;)	493	for (;;)
344	{	494	{
345	pthread_mutex_lock (&reslock);	495	LOCK (reslock);
346	req = ress;	496	req = reqq_shift (&res_queue);
347		497
348	if (req)	498	if (req)
349	{	499	{
350	ress = req->next;
351
352	if (!ress)	500	if (!res_queue.size)
353	{	501	{
354	/* read any signals sent by the worker threads */	502	/* read any signals sent by the worker threads */
355	char buf [32];	503	char buf [32];
356	while (read (respipe [0], buf, 32) == 32)	504	while (read (respipe [0], buf, 32) == 32)
357	;	505	;
358
359	rese = 0;
360	}	506	}
361	}	507	}
362		508
363	pthread_mutex_unlock (&reslock);	509	UNLOCK (reslock);
364		510
365	if (!req)	511	if (!req)
366	break;	512	break;
367		513
368	--nreqs;	514	--nreqs;
…		…
402		548
403	static void aio_proc(void arg);	549	static void aio_proc(void arg);
404		550
405	static void start_thread (void)	551	static void start_thread (void)
406	{	552	{
		553	worker *wrk = calloc (1, sizeof (worker));
		554
		555	if (!wrk)
		556	croak ("unable to allocate worker thread data");
		557
407	sigset_t fullsigset, oldsigset;	558	sigset_t fullsigset, oldsigset;
408	pthread_t tid;
409	pthread_attr_t attr;	559	pthread_attr_t attr;
410		560
411	pthread_attr_init (&attr);	561	pthread_attr_init (&attr);
412	pthread_attr_setstacksize (&attr, STACKSIZE);	562	pthread_attr_setstacksize (&attr, STACKSIZE);
413	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	563	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
414		564
415	sigfillset (&fullsigset);	565	sigfillset (&fullsigset);
		566
		567	LOCK (wrklock);
416	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	568	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
417		569
418	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	570	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		571	{
		572	wrk->prev = &wrk_first;
		573	wrk->next = wrk_first.next;
		574	wrk_first.next->prev = wrk;
		575	wrk_first.next = wrk;
419	started++;	576	started++;
		577	}
		578	else
		579	free (wrk);
420		580
421	sigprocmask (SIG_SETMASK, &oldsigset, 0);	581	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		582	UNLOCK (wrklock);
422	}	583	}
423		584
424	static void req_send (aio_req req)	585	static void req_send (aio_req req)
425	{	586	{
426	while (started < wanted && nreqs >= started)	587	while (started < wanted && nreqs >= started)
427	start_thread ();	588	start_thread ();
428		589
429	++nreqs;	590	++nreqs;
430		591
431	pthread_mutex_lock (&reqlock);	592	LOCK (reqlock);
432		593	reqq_push (&req_queue, req);
433	req->next = 0;
434
435	if (reqe)
436	{
437	reqe->next = req;
438	reqe = req;
439	}
440	else
441	reqe = reqs = req;
442
443	pthread_cond_signal (&reqwait);	594	pthread_cond_signal (&reqwait);
444	pthread_mutex_unlock (&reqlock);	595	UNLOCK (reqlock);
445		596
446	if (nreqs > max_outstanding)	597	if (nreqs > max_outstanding)
447	for (;;)	598	for (;;)
448	{	599	{
449	poll_cb ();	600	poll_cb ();
…		…
456	}	607	}
457		608
458	static void end_thread (void)	609	static void end_thread (void)
459	{	610	{
460	aio_req req;	611	aio_req req;
		612
461	Newz (0, req, 1, aio_cb);	613	Newz (0, req, 1, aio_cb);
		614
462	req->type = REQ_QUIT;	615	req->type = REQ_QUIT;
		616	req->pri = PRI_MAX + PRI_BIAS;
463		617
464	req_send (req);	618	req_send (req);
465	}	619	}
466		620
467	static void min_parallel (int nthreads)	621	static void min_parallel (int nthreads)
…		…
519	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	673	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
520	{	674	{
521	ssize_t res;	675	ssize_t res;
522	off_t ooffset;	676	off_t ooffset;
523		677
524	pthread_mutex_lock (&preadwritelock);	678	LOCK (preadwritelock);
525	ooffset = lseek (fd, 0, SEEK_CUR);	679	ooffset = lseek (fd, 0, SEEK_CUR);
526	lseek (fd, offset, SEEK_SET);	680	lseek (fd, offset, SEEK_SET);
527	res = read (fd, buf, count);	681	res = read (fd, buf, count);
528	lseek (fd, ooffset, SEEK_SET);	682	lseek (fd, ooffset, SEEK_SET);
529	pthread_mutex_unlock (&preadwritelock);	683	UNLOCK (preadwritelock);
530		684
531	return res;	685	return res;
532	}	686	}
533		687
534	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	688	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
535	{	689	{
536	ssize_t res;	690	ssize_t res;
537	off_t ooffset;	691	off_t ooffset;
538		692
539	pthread_mutex_lock (&preadwritelock);	693	LOCK (preadwritelock);
540	ooffset = lseek (fd, 0, SEEK_CUR);	694	ooffset = lseek (fd, 0, SEEK_CUR);
541	lseek (fd, offset, SEEK_SET);	695	lseek (fd, offset, SEEK_SET);
542	res = write (fd, buf, count);	696	res = write (fd, buf, count);
543	lseek (fd, offset, SEEK_SET);	697	lseek (fd, offset, SEEK_SET);
544	pthread_mutex_unlock (&preadwritelock);	698	UNLOCK (preadwritelock);
545		699
546	return res;	700	return res;
547	}	701	}
548	#endif	702	#endif
549		703
…		…
554	#if !HAVE_READAHEAD	708	#if !HAVE_READAHEAD
555	# define readahead aio_readahead	709	# define readahead aio_readahead
556		710
557	static ssize_t readahead (int fd, off_t offset, size_t count)	711	static ssize_t readahead (int fd, off_t offset, size_t count)
558	{	712	{
559	char readahead_buf[4096];	713	dBUF;
560		714
561	while (count > 0)	715	while (count > 0)
562	{	716	{
563	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	717	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
564		718
565	pread (fd, readahead_buf, len, offset);	719	pread (fd, aio_buf, len, offset);
566	offset += len;	720	offset += len;
567	count -= len;	721	count -= len;
568	}	722	}
569		723
570	errno = 0;	724	errno = 0;
…		…
579	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)	733	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
580	{	734	{
581	struct dirent *e;	735	struct dirent *e;
582	int errorno;	736	int errorno;
583		737
584	pthread_mutex_lock (&readdirlock);	738	LOCK (readdirlock);
585		739
586	e = readdir (dirp);	740	e = readdir (dirp);
587	errorno = errno;	741	errorno = errno;
588		742
589	if (e)	743	if (e)
…		…
592	strcpy (ent->d_name, e->d_name);	746	strcpy (ent->d_name, e->d_name);
593	}	747	}
594	else	748	else
595	*res = 0;	749	*res = 0;
596		750
597	pthread_mutex_unlock (&readdirlock);	751	UNLOCK (readdirlock);
598		752
599	errno = errorno;	753	errno = errorno;
600	return e ? 0 : -1;	754	return e ? 0 : -1;
601	}	755	}
602	#endif	756	#endif
603		757
604	/* sendfile always needs emulation */	758	/* sendfile always needs emulation */
605	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	759	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
606	{	760	{
607	ssize_t res;	761	ssize_t res;
608		762
609	if (!count)	763	if (!count)
610	return 0;	764	return 0;
…		…
659	#endif	813	#endif
660	)	814	)
661	)	815	)
662	{	816	{
663	/* emulate sendfile. this is a major pain in the ass */	817	/* emulate sendfile. this is a major pain in the ass */
664	char buf[4096];	818	dBUF;
		819
665	res = 0;	820	res = 0;
666		821
667	while (count)	822	while (count)
668	{	823	{
669	ssize_t cnt;	824	ssize_t cnt;
670		825
671	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	826	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
672		827
673	if (cnt <= 0)	828	if (cnt <= 0)
674	{	829	{
675	if (cnt && !res) res = -1;	830	if (cnt && !res) res = -1;
676	break;	831	break;
677	}	832	}
678		833
679	cnt = write (ofd, buf, cnt);	834	cnt = write (ofd, aio_buf, cnt);
680		835
681	if (cnt <= 0)	836	if (cnt <= 0)
682	{	837	{
683	if (cnt && !res) res = -1;	838	if (cnt && !res) res = -1;
684	break;	839	break;
…		…
692		847
693	return res;	848	return res;
694	}	849	}
695		850
696	/* read a full directory */	851	/* read a full directory */
697	static int scandir_ (const char path, void *namesp)	852	static void scandir_ (aio_req req, worker *self)
698	{	853	{
699	DIR *dirp = opendir (path);	854	DIR *dirp;
700	union	855	union
701	{	856	{
702	struct dirent d;	857	struct dirent d;
703	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	858	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
704	} u;	859	} *u;
705	struct dirent *entp;	860	struct dirent *entp;
706	char name, names;	861	char name, names;
707	int memlen = 4096;	862	int memlen = 4096;
708	int memofs = 0;	863	int memofs = 0;
709	int res = 0;	864	int res = 0;
710	int errorno;	865	int errorno;
711		866
712	if (!dirp)	867	LOCK (wrklock);
713	return -1;	868	self->dirp = dirp = opendir (req->dataptr);
		869	self->dbuf = u = malloc (sizeof (*u));
		870	UNLOCK (wrklock);
714		871
715	names = malloc (memlen);	872	req->data2ptr = names = malloc (memlen);
716		873
		874	if (dirp && u && names)
717	for (;;)	875	for (;;)
718	{	876	{
		877	errno = 0;
719	errno = 0, readdir_r (dirp, &u.d, &entp);	878	readdir_r (dirp, &u->d, &entp);
720		879
721	if (!entp)	880	if (!entp)
722	break;	881	break;
723		882
724	name = entp->d_name;	883	name = entp->d_name;
725		884
726	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))	885	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
727	{	886	{
728	int len = strlen (name) + 1;	887	int len = strlen (name) + 1;
729		888
730	res++;	889	res++;
731		890
732	while (memofs + len > memlen)	891	while (memofs + len > memlen)
733	{	892	{
734	memlen *= 2;	893	memlen *= 2;
		894	LOCK (wrklock);
735	names = realloc (names, memlen);	895	req->data2ptr = names = realloc (names, memlen);
		896	UNLOCK (wrklock);
		897
736	if (!names)	898	if (!names)
737	break;	899	break;
738	}	900	}
739		901
740	memcpy (names + memofs, name, len);	902	memcpy (names + memofs, name, len);
741	memofs += len;	903	memofs += len;
742	}	904	}
743	}	905	}
744		906
745	errorno = errno;
746	closedir (dirp);
747
748	if (errorno)	907	if (errno)
749	{
750	free (names);
751	errno = errorno;
752	res = -1;	908	res = -1;
753	}	909
754		910	req->result = res;
755	namesp = (void )names;
756	return res;
757	}	911	}
758		912
759	/*****************************************************************************/	913	/*****************************************************************************/
760		914
761	static void aio_proc (void thr_arg)	915	static void aio_proc (void thr_arg)
762	{	916	{
763	aio_req req;	917	aio_req req;
764	int type;	918	int type;
		919	worker self = (worker )thr_arg;
765		920
766	do	921	do
767	{	922	{
768	pthread_mutex_lock (&reqlock);	923	LOCK (reqlock);
769		924
770	for (;;)	925	for (;;)
771	{	926	{
772	req = reqs;	927	self->req = req = reqq_shift (&req_queue);
773
774	if (reqs)
775	{
776	reqs = reqs->next;
777	if (!reqs) reqe = 0;
778	}
779		928
780	if (req)	929	if (req)
781	break;	930	break;
782		931
783	pthread_cond_wait (&reqwait, &reqlock);	932	pthread_cond_wait (&reqwait, &reqlock);
784	}	933	}
785		934
786	pthread_mutex_unlock (&reqlock);	935	UNLOCK (reqlock);
787		936
788	errno = 0; /* strictly unnecessary */	937	errno = 0; /* strictly unnecessary */
789
790	if (!req->cancelled)
791	switch (type = req->type) /* remember type for QUIT check */	938	type = req->type; /* remember type for QUIT check */
		939
		940	if (!(req->flags & FLAG_CANCELLED))
		941	switch (type)
792	{	942	{
793	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	943	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
794	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	944	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
795		945
796	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	946	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
797	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	947	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
798		948
799	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	949	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
800	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	950	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
801	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	951	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
802		952
…		…
808	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	958	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
809	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	959	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
810		960
811	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	961	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
812	case REQ_FSYNC: req->result = fsync (req->fd); break;	962	case REQ_FSYNC: req->result = fsync (req->fd); break;
813	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	963	case REQ_READDIR: scandir_ (req, self); break;
814		964
815	case REQ_SLEEP:	965	case REQ_BUSY:
816	{	966	{
817	struct timeval tv;	967	struct timeval tv;
818		968
819	tv.tv_sec = req->fd;	969	tv.tv_sec = req->fd;
820	tv.tv_usec = req->fd2;	970	tv.tv_usec = req->fd2;
821		971
822	req->result = select (0, 0, 0, 0, &tv);	972	req->result = select (0, 0, 0, 0, &tv);
823	}	973	}
824		974
		975	case REQ_GROUP:
		976	case REQ_NOP:
825	case REQ_QUIT:	977	case REQ_QUIT:
826	break;	978	break;
827		979
828	default:	980	default:
829	req->result = ENOSYS;	981	req->result = ENOSYS;
830	break;	982	break;
831	}	983	}
832		984
833	req->errorno = errno;	985	req->errorno = errno;
834		986
835	pthread_mutex_lock (&reslock);	987	LOCK (reslock);
836		988
837	req->next = 0;	989	if (!reqq_push (&res_queue, req))
838
839	if (rese)
840	{
841	rese->next = req;
842	rese = req;
843	}
844	else
845	{
846	rese = ress = req;
847
848	/* write a dummy byte to the pipe so fh becomes ready */	990	/* write a dummy byte to the pipe so fh becomes ready */
849	write (respipe [1], &respipe, 1);	991	write (respipe [1], &respipe, 1);
850	}
851		992
852	pthread_mutex_unlock (&reslock);	993	self->req = 0;
		994	worker_clear (self);
		995
		996	UNLOCK (reslock);
853	}	997	}
854	while (type != REQ_QUIT);	998	while (type != REQ_QUIT);
855		999
		1000	LOCK (wrklock);
		1001	worker_free (self);
		1002	UNLOCK (wrklock);
		1003
856	return 0;	1004	return 0;
857	}	1005	}
858		1006
859	/*****************************************************************************/	1007	/*****************************************************************************/
860		1008
861	static void atfork_prepare (void)	1009	static void atfork_prepare (void)
862	{	1010	{
863	pthread_mutex_lock (&reqlock);	1011	LOCK (wrklock);
864	pthread_mutex_lock (&reslock);	1012	LOCK (reqlock);
		1013	LOCK (reslock);
865	#if !HAVE_PREADWRITE	1014	#if !HAVE_PREADWRITE
866	pthread_mutex_lock (&preadwritelock);	1015	LOCK (preadwritelock);
867	#endif	1016	#endif
868	#if !HAVE_READDIR_R	1017	#if !HAVE_READDIR_R
869	pthread_mutex_lock (&readdirlock);	1018	LOCK (readdirlock);
870	#endif	1019	#endif
871	}	1020	}
872		1021
873	static void atfork_parent (void)	1022	static void atfork_parent (void)
874	{	1023	{
875	#if !HAVE_READDIR_R	1024	#if !HAVE_READDIR_R
876	pthread_mutex_unlock (&readdirlock);	1025	UNLOCK (readdirlock);
877	#endif	1026	#endif
878	#if !HAVE_PREADWRITE	1027	#if !HAVE_PREADWRITE
879	pthread_mutex_unlock (&preadwritelock);	1028	UNLOCK (preadwritelock);
880	#endif	1029	#endif
881	pthread_mutex_unlock (&reslock);	1030	UNLOCK (reslock);
882	pthread_mutex_unlock (&reqlock);	1031	UNLOCK (reqlock);
		1032	UNLOCK (wrklock);
883	}	1033	}
884		1034
885	static void atfork_child (void)	1035	static void atfork_child (void)
886	{	1036	{
887	aio_req prv;	1037	aio_req prv;
888		1038
		1039	while (prv = reqq_shift (&req_queue))
		1040	req_free (prv);
		1041
		1042	while (prv = reqq_shift (&res_queue))
		1043	req_free (prv);
		1044
		1045	while (wrk_first.next != &wrk_first)
		1046	{
		1047	worker *wrk = wrk_first.next;
		1048
		1049	if (wrk->req)
		1050	req_free (wrk->req);
		1051
		1052	worker_clear (wrk);
		1053	worker_free (wrk);
		1054	}
		1055
889	started = 0;	1056	started = 0;
890		1057	nreqs = 0;
891	while (reqs)
892	{
893	prv = reqs;
894	reqs = prv->next;
895	req_free (prv);
896	}
897
898	reqs = reqe = 0;
899
900	while (ress)
901	{
902	prv = ress;
903	ress = prv->next;
904	req_free (prv);
905	}
906
907	ress = rese = 0;
908		1058
909	close (respipe [0]);	1059	close (respipe [0]);
910	close (respipe [1]);	1060	close (respipe [1]);
911	create_pipe ();	1061	create_pipe ();
912		1062
913	atfork_parent ();	1063	atfork_parent ();
914	}	1064	}
915		1065
916	#define dREQ \	1066	#define dREQ \
917	aio_req req; \	1067	aio_req req; \
		1068	int req_pri = next_pri; \
		1069	next_pri = DEFAULT_PRI + PRI_BIAS; \
918	\	1070	\
919	if (SvOK (callback) && !SvROK (callback)) \	1071	if (SvOK (callback) && !SvROK (callback)) \
920	croak ("callback must be undef or of reference type"); \	1072	croak ("callback must be undef or of reference type"); \
921	\	1073	\
922	Newz (0, req, 1, aio_cb); \	1074	Newz (0, req, 1, aio_cb); \
923	if (!req) \	1075	if (!req) \
924	croak ("out of memory during aio_req allocation"); \	1076	croak ("out of memory during aio_req allocation"); \
925	\	1077	\
926	req->callback = newSVsv (callback)	1078	req->callback = newSVsv (callback); \
		1079	req->pri = req_pri
927		1080
928	#define REQ_SEND \	1081	#define REQ_SEND \
929	req_send (req); \	1082	req_send (req); \
930	\	1083	\
931	if (GIMME_V != G_VOID) \	1084	if (GIMME_V != G_VOID) \
…		…
1185		1338
1186	REQ_SEND;	1339	REQ_SEND;
1187	}	1340	}
1188		1341
1189	void	1342	void
1190	aio_sleep (delay,callback=&PL_sv_undef)	1343	aio_busy (delay,callback=&PL_sv_undef)
1191	double delay	1344	double delay
1192	SV * callback	1345	SV * callback
1193	PPCODE:	1346	PPCODE:
1194	{	1347	{
1195	dREQ;	1348	dREQ;
1196		1349
1197	req->type = REQ_SLEEP;	1350	req->type = REQ_BUSY;
1198	req->fd = delay < 0. ? 0 : delay;	1351	req->fd = delay < 0. ? 0 : delay;
1199	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1352	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1200		1353
1201	REQ_SEND;	1354	REQ_SEND;
1202	}	1355	}
…		…
1206	SV * callback	1359	SV * callback
1207	PROTOTYPE: ;$	1360	PROTOTYPE: ;$
1208	PPCODE:	1361	PPCODE:
1209	{	1362	{
1210	dREQ;	1363	dREQ;
		1364
1211	req->type = REQ_GROUP;	1365	req->type = REQ_GROUP;
1212	req_send (req);	1366	req_send (req);
		1367
1213	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1368	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1214	}	1369	}
		1370
		1371	void
		1372	aio_nop (callback=&PL_sv_undef)
		1373	SV * callback
		1374	PPCODE:
		1375	{
		1376	dREQ;
		1377
		1378	req->type = REQ_NOP;
		1379
		1380	REQ_SEND;
		1381	}
		1382
		1383	void
		1384	aioreq_pri (int pri = DEFAULT_PRI)
		1385	CODE:
		1386	if (pri < PRI_MIN) pri = PRI_MIN;
		1387	if (pri > PRI_MAX) pri = PRI_MAX;
		1388	next_pri = pri + PRI_BIAS;
		1389
		1390	void
		1391	aioreq_nice (int nice = 0)
		1392	CODE:
		1393	nice = next_pri - nice;
		1394	if (nice < PRI_MIN) nice = PRI_MIN;
		1395	if (nice > PRI_MAX) nice = PRI_MAX;
		1396	next_pri = nice + PRI_BIAS;
1215		1397
1216	void	1398	void
1217	flush ()	1399	flush ()
1218	PROTOTYPE:	1400	PROTOTYPE:
1219	CODE:	1401	CODE:
…		…
1268		1450
1269	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1451	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1270		1452
1271	void	1453	void
1272	cancel (aio_req_ornot req)	1454	cancel (aio_req_ornot req)
1273	PROTOTYPE:
1274	CODE:	1455	CODE:
1275	req_cancel (req);	1456	req_cancel (req);
		1457
		1458	void
		1459	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1460	CODE:
		1461	SvREFCNT_dec (req->callback);
		1462	req->callback = newSVsv (callback);
1276		1463
1277	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1464	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1278		1465
1279	void	1466	void
1280	add (aio_req grp, ...)	1467	add (aio_req grp, ...)
…		…
1322	SvREFCNT_dec (grp->data);	1509	SvREFCNT_dec (grp->data);
1323	grp->data = (SV *)av;	1510	grp->data = (SV *)av;
1324	}	1511	}
1325		1512
1326	void	1513	void
1327	lock (aio_req grp)
1328	CODE:
1329	++grp->length;
1330
1331	void
1332	unlock (aio_req grp)
1333	CODE:
1334	aio_grp_dec (grp);
1335
1336	void
1337	feeder_limit (aio_req grp, int limit)	1514	limit (aio_req grp, int limit)
1338	CODE:	1515	CODE:
1339	grp->fd2 = limit;	1516	grp->fd2 = limit;
1340	aio_grp_feed (grp);	1517	aio_grp_feed (grp);
1341		1518
1342	void	1519	void
1343	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)	1520	feed (aio_req grp, SV *callback=&PL_sv_undef)
1344	CODE:	1521	CODE:
1345	{	1522	{
1346	SvREFCNT_dec (grp->fh2);	1523	SvREFCNT_dec (grp->fh2);
1347	grp->fh2 = newSVsv (callback);	1524	grp->fh2 = newSVsv (callback);
1348		1525

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing IO-AIO/AIO.xs (file contents): Revision 1.53 by root, Mon Oct 23 00:17:07 2006 UTC vs. Revision 1.71 by root, Tue Oct 24 16:35:04 2006 UTC

Diff Legend

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.53 by root, Mon Oct 23 00:17:07 2006 UTC vs.
Revision 1.71 by root, Tue Oct 24 16:35:04 2006 UTC