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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.60 by root, Mon Oct 23 20:05:27 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,
…		…
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_GROUP, REQ_NOP,	81	REQ_GROUP, REQ_NOP,
61	REQ_SLEEP,	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
…		…
95		116
96	typedef aio_cb *aio_req;	117	typedef aio_cb *aio_req;
97	typedef aio_cb *aio_req_ornot;	118	typedef aio_cb *aio_req_ornot;
98		119
99	enum {	120	enum {
100	PRI_MIN = 4,	121	PRI_MIN = -4,
101	PRI_MAX = -4,	122	PRI_MAX = 4,
102		123
103	DEFAULT_PRI = 0,	124	DEFAULT_PRI = 0,
104	PRI_BIAS = PRI_MIN,	125	PRI_BIAS = -PRI_MIN,
		126	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
105	};	127	};
106		128
107	static int next_pri = DEFAULT_PRI + PRI_BIAS;	129	static int next_pri = DEFAULT_PRI + PRI_BIAS;
108		130
109	static int started, wanted;	131	static int started, wanted;
110	static volatile int nreqs;	132	static volatile int nreqs;
111	static int max_outstanding = 1<<30;	133	static int max_outstanding = 1<<30;
112	static int respipe [2];	134	static int respipe [2];
113		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
114	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	185	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
115	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	186	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
116	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	187	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
117		188
118	static volatile aio_req reqs, reqe; /* queue start, queue end */	189	/*
119	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	}
120		242
121	static void req_invoke (aio_req req);	243	static void req_invoke (aio_req req);
122	static void req_free (aio_req req);	244	static void req_free (aio_req req);
123		245
124	/* must be called at most once */	246	/* must be called at most once */
…		…
158	ENTER;	280	ENTER;
159	SAVETMPS;	281	SAVETMPS;
160	PUSHMARK (SP);	282	PUSHMARK (SP);
161	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	283	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
162	PUTBACK;	284	PUTBACK;
163	call_sv (grp->fh2, G_VOID \| G_EVAL);	285	call_sv (grp->fh2, G_VOID \| G_EVAL \| G_KEEPERR);
164	SPAGAIN;	286	SPAGAIN;
165	FREETMPS;	287	FREETMPS;
166	LEAVE;	288	LEAVE;
167	}	289	}
168		290
…		…
191	}	313	}
192	}	314	}
193		315
194	static void poll_wait ()	316	static void poll_wait ()
195	{	317	{
		318	fd_set rfd;
		319
196	while (nreqs)	320	while (nreqs)
197	{	321	{
198	aio_req req;	322	int size;
199	pthread_mutex_lock (&reslock);	323	#if !(__i386 \|\| __x86_64) /* safe without sempahore on these archs */
200	req = ress;	324	LOCK (reslock);
201	pthread_mutex_unlock (&reslock);	325	#endif
		326	size = res_queue.size;
		327	#if !(__i386 \|\| __x86_64) /* safe without sempahore on these archs */
		328	UNLOCK (reslock);
		329	#endif
202		330
203	if (req)	331	if (size)
204	return;	332	return;
205		333
206	fd_set rfd;
207	FD_ZERO(&rfd);	334	FD_ZERO(&rfd);
208	FD_SET(respipe [0], &rfd);	335	FD_SET(respipe [0], &rfd);
209		336
210	select (respipe [0] + 1, &rfd, 0, 0, 0);	337	select (respipe [0] + 1, &rfd, 0, 0, 0);
211	}	338	}
212	}	339	}
213		340
214	static void req_invoke (aio_req req)	341	static void req_invoke (aio_req req)
215	{	342	{
216	dSP;	343	dSP;
217	int errorno = errno;
218		344
219	if (req->flags & FLAG_CANCELLED \|\| !SvOK (req->callback))	345	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
220	return;	346	{
221
222	errno = req->errorno;	347	errno = req->errorno;
223		348
224	ENTER;	349	ENTER;
225	SAVETMPS;	350	SAVETMPS;
226	PUSHMARK (SP);	351	PUSHMARK (SP);
227	EXTEND (SP, 1);	352	EXTEND (SP, 1);
228		353
229	switch (req->type)	354	switch (req->type)
230	{
231	case REQ_READDIR:
232	{	355	{
233	SV *rv = &PL_sv_undef;	356	case REQ_READDIR:
234
235	if (req->result >= 0)
236	{	357	{
237	char *buf = req->data2ptr;	358	SV *rv = &PL_sv_undef;
238	AV *av = newAV ();
239		359
240	while (req->result)	360	if (req->result >= 0)
241	{	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	{
242	SV *sv = newSVpv (buf, 0);	370	SV *sv = newSVpv (buf, 0);
243		371
244	av_push (av, sv);	372	av_store (av, i, sv);
245	buf += SvCUR (sv) + 1;	373	buf += SvCUR (sv) + 1;
246	req->result--;	374	}
		375
		376	rv = sv_2mortal (newRV_noinc ((SV *)av));
247	}	377	}
248		378
249	rv = sv_2mortal (newRV_noinc ((SV *)av));	379	PUSHs (rv);
250	}	380	}
		381	break;
251		382
252	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;
253	}	421	}
254	break;
255		422
256	case REQ_OPEN:
257	{
258	/* convert fd to fh */
259	SV *fh;
260		423
261	PUSHs (sv_2mortal (newSViv (req->result)));
262	PUTBACK;	424	PUTBACK;
263	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
264	SPAGAIN;
265
266	fh = SvREFCNT_inc (POPs);
267
268	PUSHMARK (SP);
269	XPUSHs (sv_2mortal (fh));
270	}
271	break;
272
273	case REQ_GROUP:
274	req->fd = 2; /* mark group as finished */
275
276	if (req->data)
277	{
278	int i;
279	AV av = (AV )req->data;
280
281	EXTEND (SP, AvFILL (av) + 1);
282	for (i = 0; i <= AvFILL (av); ++i)
283	PUSHs (*av_fetch (av, i, 0));
284	}
285	break;
286
287	case REQ_NOP:
288	case REQ_SLEEP:
289	break;
290
291	default:
292	PUSHs (sv_2mortal (newSViv (req->result)));
293	break;
294	}
295
296
297	PUTBACK;
298	call_sv (req->callback, G_VOID \| G_EVAL);	425	call_sv (req->callback, G_VOID \| G_EVAL);
299	SPAGAIN;	426	SPAGAIN;
300		427
301	FREETMPS;	428	FREETMPS;
302	LEAVE;	429	LEAVE;
303
304	errno = errorno;
305
306	if (SvTRUE (ERRSV))
307	{	430	}
308	req_free (req);
309	croak (0);
310	}
311	}
312		431
313	static void req_free (aio_req req)
314	{
315	if (req->grp)	432	if (req->grp)
316	{	433	{
317	aio_req grp = req->grp;	434	aio_req grp = req->grp;
318		435
319	/* unlink request */	436	/* unlink request */
…		…
324	grp->grp_first = req->grp_next;	441	grp->grp_first = req->grp_next;
325		442
326	aio_grp_dec (grp);	443	aio_grp_dec (grp);
327	}	444	}
328		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	{
329	if (req->self)	455	if (req->self)
330	{	456	{
331	sv_unmagic (req->self, PERL_MAGIC_ext);	457	sv_unmagic (req->self, PERL_MAGIC_ext);
332	SvREFCNT_dec (req->self);	458	SvREFCNT_dec (req->self);
333	}	459	}
…		…
336	SvREFCNT_dec (req->fh);	462	SvREFCNT_dec (req->fh);
337	SvREFCNT_dec (req->fh2);	463	SvREFCNT_dec (req->fh2);
338	SvREFCNT_dec (req->callback);	464	SvREFCNT_dec (req->callback);
339	Safefree (req->statdata);	465	Safefree (req->statdata);
340		466
341	if (req->type == REQ_READDIR && req->result >= 0)	467	if (req->type == REQ_READDIR)
342	free (req->data2ptr);	468	free (req->data2ptr);
343		469
344	Safefree (req);	470	Safefree (req);
345	}	471	}
346		472
…		…
364	int do_croak = 0;	490	int do_croak = 0;
365	aio_req req;	491	aio_req req;
366		492
367	for (;;)	493	for (;;)
368	{	494	{
369	pthread_mutex_lock (&reslock);	495	LOCK (reslock);
370	req = ress;	496	req = reqq_shift (&res_queue);
371		497
372	if (req)	498	if (req)
373	{	499	{
374	ress = req->next;
375
376	if (!ress)	500	if (!res_queue.size)
377	{	501	{
378	/* read any signals sent by the worker threads */	502	/* read any signals sent by the worker threads */
379	char buf [32];	503	char buf [32];
380	while (read (respipe [0], buf, 32) == 32)	504	while (read (respipe [0], buf, 32) == 32)
381	;	505	;
382
383	rese = 0;
384	}	506	}
385	}	507	}
386		508
387	pthread_mutex_unlock (&reslock);	509	UNLOCK (reslock);
388		510
389	if (!req)	511	if (!req)
390	break;	512	break;
391		513
392	--nreqs;	514	--nreqs;
…		…
426		548
427	static void aio_proc(void arg);	549	static void aio_proc(void arg);
428		550
429	static void start_thread (void)	551	static void start_thread (void)
430	{	552	{
		553	worker *wrk = calloc (1, sizeof (worker));
		554
		555	if (!wrk)
		556	croak ("unable to allocate worker thread data");
		557
431	sigset_t fullsigset, oldsigset;	558	sigset_t fullsigset, oldsigset;
432	pthread_t tid;
433	pthread_attr_t attr;	559	pthread_attr_t attr;
434		560
435	pthread_attr_init (&attr);	561	pthread_attr_init (&attr);
436	pthread_attr_setstacksize (&attr, STACKSIZE);	562	pthread_attr_setstacksize (&attr, STACKSIZE);
437	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	563	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
438		564
439	sigfillset (&fullsigset);	565	sigfillset (&fullsigset);
		566
		567	LOCK (wrklock);
440	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	568	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
441		569
442	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;
443	started++;	576	started++;
		577	}
		578	else
		579	free (wrk);
444		580
445	sigprocmask (SIG_SETMASK, &oldsigset, 0);	581	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		582	UNLOCK (wrklock);
446	}	583	}
447		584
448	static void req_send (aio_req req)	585	static void req_send (aio_req req)
449	{	586	{
450	while (started < wanted && nreqs >= started)	587	while (started < wanted && nreqs >= started)
451	start_thread ();	588	start_thread ();
452		589
453	++nreqs;	590	++nreqs;
454		591
455	pthread_mutex_lock (&reqlock);	592	LOCK (reqlock);
456		593	reqq_push (&req_queue, req);
457	req->next = 0;
458
459	if (reqe)
460	{
461	reqe->next = req;
462	reqe = req;
463	}
464	else
465	reqe = reqs = req;
466
467	pthread_cond_signal (&reqwait);	594	pthread_cond_signal (&reqwait);
468	pthread_mutex_unlock (&reqlock);	595	UNLOCK (reqlock);
469		596
470	if (nreqs > max_outstanding)	597	if (nreqs > max_outstanding)
471	for (;;)	598	for (;;)
472	{	599	{
473	poll_cb ();	600	poll_cb ();
…		…
480	}	607	}
481		608
482	static void end_thread (void)	609	static void end_thread (void)
483	{	610	{
484	aio_req req;	611	aio_req req;
		612
485	Newz (0, req, 1, aio_cb);	613	Newz (0, req, 1, aio_cb);
		614
486	req->type = REQ_QUIT;	615	req->type = REQ_QUIT;
		616	req->pri = PRI_MAX + PRI_BIAS;
487		617
488	req_send (req);	618	req_send (req);
489	}	619	}
490		620
491	static void min_parallel (int nthreads)	621	static void min_parallel (int nthreads)
…		…
543	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)
544	{	674	{
545	ssize_t res;	675	ssize_t res;
546	off_t ooffset;	676	off_t ooffset;
547		677
548	pthread_mutex_lock (&preadwritelock);	678	LOCK (preadwritelock);
549	ooffset = lseek (fd, 0, SEEK_CUR);	679	ooffset = lseek (fd, 0, SEEK_CUR);
550	lseek (fd, offset, SEEK_SET);	680	lseek (fd, offset, SEEK_SET);
551	res = read (fd, buf, count);	681	res = read (fd, buf, count);
552	lseek (fd, ooffset, SEEK_SET);	682	lseek (fd, ooffset, SEEK_SET);
553	pthread_mutex_unlock (&preadwritelock);	683	UNLOCK (preadwritelock);
554		684
555	return res;	685	return res;
556	}	686	}
557		687
558	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)
559	{	689	{
560	ssize_t res;	690	ssize_t res;
561	off_t ooffset;	691	off_t ooffset;
562		692
563	pthread_mutex_lock (&preadwritelock);	693	LOCK (preadwritelock);
564	ooffset = lseek (fd, 0, SEEK_CUR);	694	ooffset = lseek (fd, 0, SEEK_CUR);
565	lseek (fd, offset, SEEK_SET);	695	lseek (fd, offset, SEEK_SET);
566	res = write (fd, buf, count);	696	res = write (fd, buf, count);
567	lseek (fd, offset, SEEK_SET);	697	lseek (fd, offset, SEEK_SET);
568	pthread_mutex_unlock (&preadwritelock);	698	UNLOCK (preadwritelock);
569		699
570	return res;	700	return res;
571	}	701	}
572	#endif	702	#endif
573		703
…		…
578	#if !HAVE_READAHEAD	708	#if !HAVE_READAHEAD
579	# define readahead aio_readahead	709	# define readahead aio_readahead
580		710
581	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)
582	{	712	{
583	char readahead_buf[4096];	713	dBUF;
584		714
585	while (count > 0)	715	while (count > 0)
586	{	716	{
587	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	717	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
588		718
589	pread (fd, readahead_buf, len, offset);	719	pread (fd, aio_buf, len, offset);
590	offset += len;	720	offset += len;
591	count -= len;	721	count -= len;
592	}	722	}
593		723
594	errno = 0;	724	errno = 0;
…		…
603	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)
604	{	734	{
605	struct dirent *e;	735	struct dirent *e;
606	int errorno;	736	int errorno;
607		737
608	pthread_mutex_lock (&readdirlock);	738	LOCK (readdirlock);
609		739
610	e = readdir (dirp);	740	e = readdir (dirp);
611	errorno = errno;	741	errorno = errno;
612		742
613	if (e)	743	if (e)
…		…
616	strcpy (ent->d_name, e->d_name);	746	strcpy (ent->d_name, e->d_name);
617	}	747	}
618	else	748	else
619	*res = 0;	749	*res = 0;
620		750
621	pthread_mutex_unlock (&readdirlock);	751	UNLOCK (readdirlock);
622		752
623	errno = errorno;	753	errno = errorno;
624	return e ? 0 : -1;	754	return e ? 0 : -1;
625	}	755	}
626	#endif	756	#endif
627		757
628	/* sendfile always needs emulation */	758	/* sendfile always needs emulation */
629	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)
630	{	760	{
631	ssize_t res;	761	ssize_t res;
632		762
633	if (!count)	763	if (!count)
634	return 0;	764	return 0;
…		…
683	#endif	813	#endif
684	)	814	)
685	)	815	)
686	{	816	{
687	/* emulate sendfile. this is a major pain in the ass */	817	/* emulate sendfile. this is a major pain in the ass */
688	char buf[4096];	818	dBUF;
		819
689	res = 0;	820	res = 0;
690		821
691	while (count)	822	while (count)
692	{	823	{
693	ssize_t cnt;	824	ssize_t cnt;
694		825
695	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	826	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
696		827
697	if (cnt <= 0)	828	if (cnt <= 0)
698	{	829	{
699	if (cnt && !res) res = -1;	830	if (cnt && !res) res = -1;
700	break;	831	break;
701	}	832	}
702		833
703	cnt = write (ofd, buf, cnt);	834	cnt = write (ofd, aio_buf, cnt);
704		835
705	if (cnt <= 0)	836	if (cnt <= 0)
706	{	837	{
707	if (cnt && !res) res = -1;	838	if (cnt && !res) res = -1;
708	break;	839	break;
…		…
716		847
717	return res;	848	return res;
718	}	849	}
719		850
720	/* read a full directory */	851	/* read a full directory */
721	static int scandir_ (const char path, void *namesp)	852	static void scandir_ (aio_req req, worker *self)
722	{	853	{
723	DIR *dirp = opendir (path);	854	DIR *dirp;
724	union	855	union
725	{	856	{
726	struct dirent d;	857	struct dirent d;
727	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	858	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
728	} u;	859	} *u;
729	struct dirent *entp;	860	struct dirent *entp;
730	char name, names;	861	char name, names;
731	int memlen = 4096;	862	int memlen = 4096;
732	int memofs = 0;	863	int memofs = 0;
733	int res = 0;	864	int res = 0;
734	int errorno;	865	int errorno;
735		866
736	if (!dirp)	867	LOCK (wrklock);
737	return -1;	868	self->dirp = dirp = opendir (req->dataptr);
		869	self->dbuf = u = malloc (sizeof (*u));
		870	UNLOCK (wrklock);
738		871
739	names = malloc (memlen);	872	req->data2ptr = names = malloc (memlen);
740		873
		874	if (dirp && u && names)
741	for (;;)	875	for (;;)
742	{	876	{
		877	errno = 0;
743	errno = 0, readdir_r (dirp, &u.d, &entp);	878	readdir_r (dirp, &u->d, &entp);
744		879
745	if (!entp)	880	if (!entp)
746	break;	881	break;
747		882
748	name = entp->d_name;	883	name = entp->d_name;
749		884
750	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))	885	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
751	{	886	{
752	int len = strlen (name) + 1;	887	int len = strlen (name) + 1;
753		888
754	res++;	889	res++;
755		890
756	while (memofs + len > memlen)	891	while (memofs + len > memlen)
757	{	892	{
758	memlen *= 2;	893	memlen *= 2;
		894	LOCK (wrklock);
759	names = realloc (names, memlen);	895	req->data2ptr = names = realloc (names, memlen);
		896	UNLOCK (wrklock);
		897
760	if (!names)	898	if (!names)
761	break;	899	break;
762	}	900	}
763		901
764	memcpy (names + memofs, name, len);	902	memcpy (names + memofs, name, len);
765	memofs += len;	903	memofs += len;
766	}	904	}
767	}	905	}
768		906
769	errorno = errno;
770	closedir (dirp);
771
772	if (errorno)	907	if (errno)
773	{
774	free (names);
775	errno = errorno;
776	res = -1;	908	res = -1;
777	}	909
778		910	req->result = res;
779	namesp = (void )names;
780	return res;
781	}	911	}
782		912
783	/*****************************************************************************/	913	/*****************************************************************************/
784		914
785	static void aio_proc (void thr_arg)	915	static void aio_proc (void thr_arg)
786	{	916	{
787	aio_req req;	917	aio_req req;
788	int type;	918	int type;
		919	worker self = (worker )thr_arg;
789		920
790	do	921	do
791	{	922	{
792	pthread_mutex_lock (&reqlock);	923	LOCK (reqlock);
793		924
794	for (;;)	925	for (;;)
795	{	926	{
796	req = reqs;	927	self->req = req = reqq_shift (&req_queue);
797
798	if (reqs)
799	{
800	reqs = reqs->next;
801	if (!reqs) reqe = 0;
802	}
803		928
804	if (req)	929	if (req)
805	break;	930	break;
806		931
807	pthread_cond_wait (&reqwait, &reqlock);	932	pthread_cond_wait (&reqwait, &reqlock);
808	}	933	}
809		934
810	pthread_mutex_unlock (&reqlock);	935	UNLOCK (reqlock);
811		936
812	errno = 0; /* strictly unnecessary */	937	errno = 0; /* strictly unnecessary */
813	type = req->type; /* remember type for QUIT check */	938	type = req->type; /* remember type for QUIT check */
814		939
815	if (!(req->flags & FLAG_CANCELLED))	940	if (!(req->flags & FLAG_CANCELLED))
…		…
817	{	942	{
818	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;
819	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;
820		945
821	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;
822	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;
823		948
824	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	949	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
825	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	950	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
826	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	951	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
827		952
…		…
833	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	958	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
834	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	959	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
835		960
836	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	961	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
837	case REQ_FSYNC: req->result = fsync (req->fd); break;	962	case REQ_FSYNC: req->result = fsync (req->fd); break;
838	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	963	case REQ_READDIR: scandir_ (req, self); break;
839		964
840	case REQ_SLEEP:	965	case REQ_BUSY:
841	{	966	{
842	struct timeval tv;	967	struct timeval tv;
843		968
844	tv.tv_sec = req->fd;	969	tv.tv_sec = req->fd;
845	tv.tv_usec = req->fd2;	970	tv.tv_usec = req->fd2;
…		…
857	break;	982	break;
858	}	983	}
859		984
860	req->errorno = errno;	985	req->errorno = errno;
861		986
862	pthread_mutex_lock (&reslock);	987	LOCK (reslock);
863		988
864	req->next = 0;	989	if (!reqq_push (&res_queue, req))
865
866	if (rese)
867	{
868	rese->next = req;
869	rese = req;
870	}
871	else
872	{
873	rese = ress = req;
874
875	/* write a dummy byte to the pipe so fh becomes ready */	990	/* write a dummy byte to the pipe so fh becomes ready */
876	write (respipe [1], &respipe, 1);	991	write (respipe [1], &respipe, 1);
877	}
878		992
879	pthread_mutex_unlock (&reslock);	993	self->req = 0;
		994	worker_clear (self);
		995
		996	UNLOCK (reslock);
880	}	997	}
881	while (type != REQ_QUIT);	998	while (type != REQ_QUIT);
882		999
		1000	LOCK (wrklock);
		1001	worker_free (self);
		1002	UNLOCK (wrklock);
		1003
883	return 0;	1004	return 0;
884	}	1005	}
885		1006
886	/*****************************************************************************/	1007	/*****************************************************************************/
887		1008
888	static void atfork_prepare (void)	1009	static void atfork_prepare (void)
889	{	1010	{
890	pthread_mutex_lock (&reqlock);	1011	LOCK (wrklock);
891	pthread_mutex_lock (&reslock);	1012	LOCK (reqlock);
		1013	LOCK (reslock);
892	#if !HAVE_PREADWRITE	1014	#if !HAVE_PREADWRITE
893	pthread_mutex_lock (&preadwritelock);	1015	LOCK (preadwritelock);
894	#endif	1016	#endif
895	#if !HAVE_READDIR_R	1017	#if !HAVE_READDIR_R
896	pthread_mutex_lock (&readdirlock);	1018	LOCK (readdirlock);
897	#endif	1019	#endif
898	}	1020	}
899		1021
900	static void atfork_parent (void)	1022	static void atfork_parent (void)
901	{	1023	{
902	#if !HAVE_READDIR_R	1024	#if !HAVE_READDIR_R
903	pthread_mutex_unlock (&readdirlock);	1025	UNLOCK (readdirlock);
904	#endif	1026	#endif
905	#if !HAVE_PREADWRITE	1027	#if !HAVE_PREADWRITE
906	pthread_mutex_unlock (&preadwritelock);	1028	UNLOCK (preadwritelock);
907	#endif	1029	#endif
908	pthread_mutex_unlock (&reslock);	1030	UNLOCK (reslock);
909	pthread_mutex_unlock (&reqlock);	1031	UNLOCK (reqlock);
		1032	UNLOCK (wrklock);
910	}	1033	}
911		1034
912	static void atfork_child (void)	1035	static void atfork_child (void)
913	{	1036	{
914	aio_req prv;	1037	aio_req prv;
915		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
916	started = 0;	1056	started = 0;
917		1057	nreqs = 0;
918	while (reqs)
919	{
920	prv = reqs;
921	reqs = prv->next;
922	req_free (prv);
923	}
924
925	reqs = reqe = 0;
926
927	while (ress)
928	{
929	prv = ress;
930	ress = prv->next;
931	req_free (prv);
932	}
933
934	ress = rese = 0;
935		1058
936	close (respipe [0]);	1059	close (respipe [0]);
937	close (respipe [1]);	1060	close (respipe [1]);
938	create_pipe ();	1061	create_pipe ();
939		1062
…		…
1215		1338
1216	REQ_SEND;	1339	REQ_SEND;
1217	}	1340	}
1218		1341
1219	void	1342	void
1220	aio_sleep (delay,callback=&PL_sv_undef)	1343	aio_busy (delay,callback=&PL_sv_undef)
1221	double delay	1344	double delay
1222	SV * callback	1345	SV * callback
1223	PPCODE:	1346	PPCODE:
1224	{	1347	{
1225	dREQ;	1348	dREQ;
1226		1349
1227	req->type = REQ_SLEEP;	1350	req->type = REQ_BUSY;
1228	req->fd = delay < 0. ? 0 : delay;	1351	req->fd = delay < 0. ? 0 : delay;
1229	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1352	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1230		1353
1231	REQ_SEND;	1354	REQ_SEND;
1232	}	1355	}
…		…
1255	req->type = REQ_NOP;	1378	req->type = REQ_NOP;
1256		1379
1257	REQ_SEND;	1380	REQ_SEND;
1258	}	1381	}
1259		1382
1260	#if 0
1261
1262	void	1383	void
1263	aio_pri (int pri = DEFAULT_PRI)	1384	aioreq_pri (int pri = DEFAULT_PRI)
1264	CODE:	1385	CODE:
1265	if (pri > PRI_MIN) pri = PRI_MIN;	1386	if (pri < PRI_MIN) pri = PRI_MIN;
1266	if (pri < PRI_MAX) pri = PRI_MAX;	1387	if (pri > PRI_MAX) pri = PRI_MAX;
1267	next_pri = pri + PRI_BIAS;	1388	next_pri = pri + PRI_BIAS;
1268		1389
1269	#endif	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;
1270		1397
1271	void	1398	void
1272	flush ()	1399	flush ()
1273	PROTOTYPE:	1400	PROTOTYPE:
1274	CODE:	1401	CODE:
…		…
1323		1450
1324	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1451	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1325		1452
1326	void	1453	void
1327	cancel (aio_req_ornot req)	1454	cancel (aio_req_ornot req)
1328	PROTOTYPE:
1329	CODE:	1455	CODE:
1330	req_cancel (req);	1456	req_cancel (req);
1331		1457
1332	void	1458	void
1333	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1459	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
…		…
1383	SvREFCNT_dec (grp->data);	1509	SvREFCNT_dec (grp->data);
1384	grp->data = (SV *)av;	1510	grp->data = (SV *)av;
1385	}	1511	}
1386		1512
1387	void	1513	void
1388	feed_limit (aio_req grp, int limit)	1514	limit (aio_req grp, int limit)
1389	CODE:	1515	CODE:
1390	grp->fd2 = limit;	1516	grp->fd2 = limit;
1391	aio_grp_feed (grp);	1517	aio_grp_feed (grp);
1392		1518
1393	void	1519	void

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.60 by root, Mon Oct 23 20:05:27 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 1.60 by root, Mon Oct 23 20:05:27 2006 UTC vs.
Revision 1.71 by root, Tue Oct 24 16:35:04 2006 UTC