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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.69 by root, Tue Oct 24 11:57:30 2006 UTC vs.
Revision 1.81 by root, Fri Oct 27 20:10:06 2006 UTC

…		…
1	#if __linux	1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
2	# define _GNU_SOURCE	5	# define _GNU_SOURCE
3	#endif	6	#endif
4		7
		8	/* just in case */
5	#define _REENTRANT 1	9	#define _REENTRANT 1
6		10
7	#include <errno.h>	11	#include <errno.h>
8		12
9	#include "EXTERN.h"	13	#include "EXTERN.h"
44	/* used for struct dirent, AIX doesn't provide it */	48	/* used for struct dirent, AIX doesn't provide it */
45	#ifndef NAME_MAX	49	#ifndef NAME_MAX
46	# define NAME_MAX 4096	50	# define NAME_MAX 4096
47	#endif	51	#endif
48		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
		57
49	#if __ia64	58	#if __ia64
50	# define STACKSIZE 65536	59	# define STACKSIZE 65536
51	#elif __i386 \|\| __x86_64 /* 16k is unreasonably high :( */	60	#elif __i386 \|\| __x86_64 /* 16k is unreasonably high :( */
52	# define STACKSIZE PTHREAD_STACK_MIN	61	# define STACKSIZE PTHREAD_STACK_MIN
53	#else	62	#else
54	# define STACKSIZE 16384	63	# define STACKSIZE 16384
55	#endif	64	#endif
56		65
		66	/* wether word reads are potentially non-atomic.
		67	* this is conservatice, likely most arches this runs
		68	* on have atomic word read/writes.
		69	*/
		70	#ifndef WORDREAD_UNSAFE
		71	# if __i386 \|\| __x86_64
		72	# define WORDREAD_UNSAFE 0
		73	# else
		74	# define WORDREAD_UNSAFE 1
		75	# endif
		76	#endif
		77
57	/* buffer size for various temporary buffers */	78	/* buffer size for various temporary buffers */
58	#define AIO_BUFSIZE 65536	79	#define AIO_BUFSIZE 65536
59		80
60	#define dBUF \	81	#define dBUF \
		82	char *aio_buf; \
		83	LOCK (wrklock); \
61	char *aio_buf = malloc (AIO_BUFSIZE); \	84	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		85	UNLOCK (wrklock); \
62	if (!aio_buf) \	86	if (!aio_buf) \
63	return -1;	87	return -1;
64
65	#define fBUF free (aio_buf)
66		88
67	enum {	89	enum {
68	REQ_QUIT,	90	REQ_QUIT,
69	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
70	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
71	REQ_SENDFILE,	93	REQ_SENDFILE,
72	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
73	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
74	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
75	REQ_READDIR,	97	REQ_MKNOD, REQ_READDIR,
76	REQ_LINK, REQ_SYMLINK,	98	REQ_LINK, REQ_SYMLINK,
77	REQ_GROUP, REQ_NOP,	99	REQ_GROUP, REQ_NOP,
78	REQ_BUSY,	100	REQ_BUSY,
79	};	101	};
80		102
…		…
122	NUM_PRI = PRI_MAX + PRI_BIAS + 1,	144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
123	};	145	};
124		146
125	static int next_pri = DEFAULT_PRI + PRI_BIAS;	147	static int next_pri = DEFAULT_PRI + PRI_BIAS;
126		148
127	static int started, wanted;	149	static unsigned int started, wanted;
128	static volatile int nreqs;
129	static int max_outstanding = 1<<30;
130	static int respipe [2];
131		150
132	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	151	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
133	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP	152	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
134	#else	153	#else
135	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER	154	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
136	#endif	155	#endif
137		156
		157	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		158	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		159
		160	/* worker threads management */
		161	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		162
		163	typedef struct worker {
		164	/* locked by wrklock */
		165	struct worker prev, next;
		166
		167	pthread_t tid;
		168
		169	/* locked by reslock, reqlock or wrklock */
		170	aio_req req; /* currently processed request */
		171	void *dbuf;
		172	DIR *dirp;
		173	} worker;
		174
		175	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		176
		177	static void worker_clear (worker *wrk)
		178	{
		179	if (wrk->dirp)
		180	{
		181	closedir (wrk->dirp);
		182	wrk->dirp = 0;
		183	}
		184
		185	if (wrk->dbuf)
		186	{
		187	free (wrk->dbuf);
		188	wrk->dbuf = 0;
		189	}
		190	}
		191
		192	static void worker_free (worker *wrk)
		193	{
		194	wrk->next->prev = wrk->prev;
		195	wrk->prev->next = wrk->next;
		196
		197	free (wrk);
		198	}
		199
		200	static volatile unsigned int nreqs, nready, npending;
		201	static volatile unsigned int max_outstanding = 0xffffffff;
		202	static int respipe [2];
		203
138	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
139	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;	205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
140	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
		207
		208	#if WORDREAD_UNSAFE
		209
		210	static unsigned int get_nready ()
		211	{
		212	unsigned int retval;
		213
		214	LOCK (reqlock);
		215	retval = nready;
		216	UNLOCK (reqlock);
		217
		218	return retval;
		219	}
		220
		221	static unsigned int get_npending ()
		222	{
		223	unsigned int retval;
		224
		225	LOCK (reslock);
		226	retval = npending;
		227	UNLOCK (reslock);
		228
		229	return retval;
		230	}
		231
		232	#else
		233
		234	# define get_nready() nready
		235	# define get_npending() npending
		236
		237	#endif
141		238
142	/*	239	/*
143	* a somewhat faster data structure might be nice, but	240	* a somewhat faster data structure might be nice, but
144	* with 8 priorities this actually needs <20 insns	241	* with 8 priorities this actually needs <20 insns
145	* per shift, the most expensive operation.	242	* per shift, the most expensive operation.
…		…
191	}	288	}
192		289
193	abort ();	290	abort ();
194	}	291	}
195		292
		293	static int poll_cb (int max);
196	static void req_invoke (aio_req req);	294	static void req_invoke (aio_req req);
197	static void req_free (aio_req req);	295	static void req_free (aio_req req);
		296	static void req_cancel (aio_req req);
198		297
199	/* must be called at most once */	298	/* must be called at most once */
200	static SV req_sv (aio_req req, const char klass)	299	static SV req_sv (aio_req req, const char klass)
201	{	300	{
202	if (!req->self)	301	if (!req->self)
…		…
264	req_invoke (grp);	363	req_invoke (grp);
265	req_free (grp);	364	req_free (grp);
266	}	365	}
267	}	366	}
268		367
269	static void poll_wait ()
270	{
271	fd_set rfd;
272
273	while (nreqs)
274	{
275	int size;
276	#if !(__i386 \|\| __x86_64) /* safe without sempahore on this archs */
277	pthread_mutex_lock (&reslock);
278	#endif
279	size = res_queue.size;
280	#if !(__i386 \|\| __x86_64) /* safe without sempahore on this archs */
281	pthread_mutex_unlock (&reslock);
282	#endif
283
284	if (size)
285	return;
286
287	FD_ZERO(&rfd);
288	FD_SET(respipe [0], &rfd);
289
290	select (respipe [0] + 1, &rfd, 0, 0, 0);
291	}
292	}
293
294	static void req_invoke (aio_req req)	368	static void req_invoke (aio_req req)
295	{	369	{
296	dSP;	370	dSP;
297		371
298	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	372	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
299	{	373	{
300	errno = req->errorno;
301
302	ENTER;	374	ENTER;
303	SAVETMPS;	375	SAVETMPS;
304	PUSHMARK (SP);	376	PUSHMARK (SP);
305	EXTEND (SP, 1);	377	EXTEND (SP, 1);
306		378
…		…
310	{	382	{
311	SV *rv = &PL_sv_undef;	383	SV *rv = &PL_sv_undef;
312		384
313	if (req->result >= 0)	385	if (req->result >= 0)
314	{	386	{
		387	int i;
315	char *buf = req->data2ptr;	388	char *buf = req->data2ptr;
316	AV *av = newAV ();	389	AV *av = newAV ();
317		390
318	while (req->result)	391	av_extend (av, req->result - 1);
		392
		393	for (i = 0; i < req->result; ++i)
319	{	394	{
320	SV *sv = newSVpv (buf, 0);	395	SV *sv = newSVpv (buf, 0);
321		396
322	av_push (av, sv);	397	av_store (av, i, sv);
323	buf += SvCUR (sv) + 1;	398	buf += SvCUR (sv) + 1;
324	req->result--;
325	}	399	}
326		400
327	rv = sv_2mortal (newRV_noinc ((SV *)av));	401	rv = sv_2mortal (newRV_noinc ((SV *)av));
328	}	402	}
329		403
…		…
369	default:	443	default:
370	PUSHs (sv_2mortal (newSViv (req->result)));	444	PUSHs (sv_2mortal (newSViv (req->result)));
371	break;	445	break;
372	}	446	}
373		447
		448	errno = req->errorno;
374		449
375	PUTBACK;	450	PUTBACK;
376	call_sv (req->callback, G_VOID \| G_EVAL);	451	call_sv (req->callback, G_VOID \| G_EVAL);
377	SPAGAIN;	452	SPAGAIN;
378		453
…		…
413	SvREFCNT_dec (req->fh);	488	SvREFCNT_dec (req->fh);
414	SvREFCNT_dec (req->fh2);	489	SvREFCNT_dec (req->fh2);
415	SvREFCNT_dec (req->callback);	490	SvREFCNT_dec (req->callback);
416	Safefree (req->statdata);	491	Safefree (req->statdata);
417		492
418	if (req->type == REQ_READDIR && req->result >= 0)	493	if (req->type == REQ_READDIR)
419	free (req->data2ptr);	494	free (req->data2ptr);
420		495
421	Safefree (req);	496	Safefree (req);
422	}	497	}
423		498
		499	static void req_cancel_subs (aio_req grp)
		500	{
		501	aio_req sub;
		502
		503	if (grp->type != REQ_GROUP)
		504	return;
		505
		506	SvREFCNT_dec (grp->fh2);
		507	grp->fh2 = 0;
		508
		509	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		510	req_cancel (sub);
		511	}
		512
424	static void req_cancel (aio_req req)	513	static void req_cancel (aio_req req)
425	{	514	{
426	req->flags \|= FLAG_CANCELLED;	515	req->flags \|= FLAG_CANCELLED;
427		516
428	if (req->type == REQ_GROUP)	517	req_cancel_subs (req);
429	{	518	}
430	aio_req sub;
431		519
432	for (sub = req->grp_first; sub; sub = sub->grp_next)	520	static void aio_proc(void arg);
433	req_cancel (sub);	521
		522	static void start_thread (void)
		523	{
		524	sigset_t fullsigset, oldsigset;
		525	pthread_attr_t attr;
		526
		527	worker *wrk = calloc (1, sizeof (worker));
		528
		529	if (!wrk)
		530	croak ("unable to allocate worker thread data");
		531
		532	pthread_attr_init (&attr);
		533	pthread_attr_setstacksize (&attr, STACKSIZE);
		534	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		535	#ifdef PTHREAD_SCOPE_PROCESS
		536	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		537	#endif
		538
		539	sigfillset (&fullsigset);
		540
		541	LOCK (wrklock);
		542	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
		543
		544	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
434	}	545	{
435	}	546	wrk->prev = &wrk_first;
		547	wrk->next = wrk_first.next;
		548	wrk_first.next->prev = wrk;
		549	wrk_first.next = wrk;
		550	++started;
		551	}
		552	else
		553	free (wrk);
436		554
		555	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		556	UNLOCK (wrklock);
		557	}
		558
		559	static void maybe_start_thread ()
		560	{
		561	#if 0
		562	static struct timeval last;
		563	struct timeval diff, now;
		564	#endif
		565
		566	if (started >= wanted)
		567	return;
		568
		569	if (nready <= nreqs - get_nready () - get_npending ())
		570	return;
		571
		572	#if 0
		573	gettimeofday (&now, 0);
		574
		575	diff.tv_sec = now.tv_sec - last.tv_sec;
		576	diff.tv_usec = now.tv_usec - last.tv_usec;
		577
		578	if (diff.tv_usec < 0)
		579	{
		580	--diff.tv_sec;
		581	diff.tv_usec += 1000000;
		582	}
		583
		584	if (!diff.tv_sec && diff.tv_usec < 10000)
		585	return;
		586
		587	last = now;
		588	#endif
		589
		590	start_thread ();
		591	}
		592
		593	static void req_send (aio_req req)
		594	{
		595	++nreqs;
		596
		597	LOCK (reqlock);
		598	++nready;
		599	reqq_push (&req_queue, req);
		600	pthread_cond_signal (&reqwait);
		601	UNLOCK (reqlock);
		602
		603	maybe_start_thread ();
		604	}
		605
		606	static void end_thread (void)
		607	{
		608	aio_req req;
		609
		610	Newz (0, req, 1, aio_cb);
		611
		612	req->type = REQ_QUIT;
		613	req->pri = PRI_MAX + PRI_BIAS;
		614
		615	req_send (req);
		616
		617	LOCK (wrklock);
		618	--started;
		619	UNLOCK (wrklock);
		620	}
		621
		622	static void min_parallel (int nthreads)
		623	{
		624	if (wanted < nthreads)
		625	wanted = nthreads;
		626	}
		627
		628	static void max_parallel (int nthreads)
		629	{
		630	if (wanted > nthreads)
		631	wanted = nthreads;
		632
		633	while (started > wanted)
		634	end_thread ();
		635	}
		636
		637	static void poll_wait ()
		638	{
		639	fd_set rfd;
		640
		641	while (nreqs)
		642	{
		643	int size;
		644	if (WORDREAD_UNSAFE) LOCK (reslock);
		645	size = res_queue.size;
		646	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		647
		648	if (size)
		649	return;
		650
		651	maybe_start_thread ();
		652
		653	FD_ZERO(&rfd);
		654	FD_SET(respipe [0], &rfd);
		655
		656	select (respipe [0] + 1, &rfd, 0, 0, 0);
		657	}
		658	}
		659
437	static int poll_cb ()	660	static int poll_cb (int max)
438	{	661	{
439	dSP;	662	dSP;
440	int count = 0;	663	int count = 0;
441	int do_croak = 0;	664	int do_croak = 0;
442	aio_req req;	665	aio_req req;
443		666
444	for (;;)	667	for (;;)
445	{	668	{
446	pthread_mutex_lock (&reslock);	669	while (max <= 0 \|\| count < max)
447	req = reqq_shift (&res_queue);
448
449	if (req)
450	{	670	{
		671	maybe_start_thread ();
		672
		673	LOCK (reslock);
		674	req = reqq_shift (&res_queue);
		675
451	if (!res_queue.size)	676	if (req)
452	{	677	{
		678	--npending;
		679
		680	if (!res_queue.size)
		681	{
453	/* read any signals sent by the worker threads */	682	/* read any signals sent by the worker threads */
454	char buf [32];	683	char buf [32];
455	while (read (respipe [0], buf, 32) == 32)	684	while (read (respipe [0], buf, 32) == 32)
		685	;
456	;	686	}
457	}	687	}
		688
		689	UNLOCK (reslock);
		690
		691	if (!req)
		692	break;
		693
		694	--nreqs;
		695
		696	if (req->type == REQ_GROUP && req->length)
		697	{
		698	req->fd = 1; /* mark request as delayed */
		699	continue;
		700	}
		701	else
		702	{
		703	if (req->type == REQ_READ)
		704	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		705
		706	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
		707	SvREADONLY_off (req->data);
		708
		709	if (req->statdata)
		710	{
		711	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		712	PL_laststatval = req->result;
		713	PL_statcache = *(req->statdata);
		714	}
		715
		716	req_invoke (req);
		717
		718	count++;
		719	}
		720
		721	req_free (req);
458	}	722	}
459		723
460	pthread_mutex_unlock (&reslock);	724	if (nreqs <= max_outstanding)
461
462	if (!req)
463	break;	725	break;
464		726
465	--nreqs;	727	poll_wait ();
466		728
467	if (req->type == REQ_QUIT)	729	max = 0;
468	started--;
469	else if (req->type == REQ_GROUP && req->length)
470	{
471	req->fd = 1; /* mark request as delayed */
472	continue;
473	}
474	else
475	{
476	if (req->type == REQ_READ)
477	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
478
479	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
480	SvREADONLY_off (req->data);
481
482	if (req->statdata)
483	{
484	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
485	PL_laststatval = req->result;
486	PL_statcache = *(req->statdata);
487	}
488
489	req_invoke (req);
490
491	count++;
492	}
493
494	req_free (req);
495	}	730	}
496		731
497	return count;	732	return count;
498	}
499
500	static void aio_proc(void arg);
501
502	static void start_thread (void)
503	{
504	sigset_t fullsigset, oldsigset;
505	pthread_t tid;
506	pthread_attr_t attr;
507
508	pthread_attr_init (&attr);
509	pthread_attr_setstacksize (&attr, STACKSIZE);
510	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
511
512	sigfillset (&fullsigset);
513	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
514
515	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
516	started++;
517
518	sigprocmask (SIG_SETMASK, &oldsigset, 0);
519	}
520
521	static void req_send (aio_req req)
522	{
523	while (started < wanted && nreqs >= started)
524	start_thread ();
525
526	++nreqs;
527
528	pthread_mutex_lock (&reqlock);
529	reqq_push (&req_queue, req);
530	pthread_cond_signal (&reqwait);
531	pthread_mutex_unlock (&reqlock);
532
533	if (nreqs > max_outstanding)
534	for (;;)
535	{
536	poll_cb ();
537
538	if (nreqs <= max_outstanding)
539	break;
540
541	poll_wait ();
542	}
543	}
544
545	static void end_thread (void)
546	{
547	aio_req req;
548
549	Newz (0, req, 1, aio_cb);
550
551	req->type = REQ_QUIT;
552	req->pri = PRI_MAX + PRI_BIAS;
553
554	req_send (req);
555	}
556
557	static void min_parallel (int nthreads)
558	{
559	if (wanted < nthreads)
560	wanted = nthreads;
561	}
562
563	static void max_parallel (int nthreads)
564	{
565	int cur = started;
566
567	if (wanted > nthreads)
568	wanted = nthreads;
569
570	while (cur > wanted)
571	{
572	end_thread ();
573	cur--;
574	}
575
576	while (started > wanted)
577	{
578	poll_wait ();
579	poll_cb ();
580	}
581	}	733	}
582		734
583	static void create_pipe ()	735	static void create_pipe ()
584	{	736	{
585	if (pipe (respipe))	737	if (pipe (respipe))
…		…
609	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	761	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
610	{	762	{
611	ssize_t res;	763	ssize_t res;
612	off_t ooffset;	764	off_t ooffset;
613		765
614	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
615	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
616	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
617	res = read (fd, buf, count);	769	res = read (fd, buf, count);
618	lseek (fd, ooffset, SEEK_SET);	770	lseek (fd, ooffset, SEEK_SET);
619	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
620		772
621	return res;	773	return res;
622	}	774	}
623		775
624	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	776	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
625	{	777	{
626	ssize_t res;	778	ssize_t res;
627	off_t ooffset;	779	off_t ooffset;
628		780
629	pthread_mutex_lock (&preadwritelock);	781	LOCK (preadwritelock);
630	ooffset = lseek (fd, 0, SEEK_CUR);	782	ooffset = lseek (fd, 0, SEEK_CUR);
631	lseek (fd, offset, SEEK_SET);	783	lseek (fd, offset, SEEK_SET);
632	res = write (fd, buf, count);	784	res = write (fd, buf, count);
633	lseek (fd, offset, SEEK_SET);	785	lseek (fd, offset, SEEK_SET);
634	pthread_mutex_unlock (&preadwritelock);	786	UNLOCK (preadwritelock);
635		787
636	return res;	788	return res;
637	}	789	}
638	#endif	790	#endif
639		791
640	#if !HAVE_FDATASYNC	792	#if !HAVE_FDATASYNC
641	# define fdatasync fsync	793	# define fdatasync fsync
642	#endif	794	#endif
643		795
644	#if !HAVE_READAHEAD	796	#if !HAVE_READAHEAD
645	# define readahead aio_readahead	797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
646		798
647	static ssize_t readahead (int fd, off_t offset, size_t count)	799	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
648	{	800	{
649	dBUF;	801	dBUF;
650		802
651	while (count > 0)	803	while (count > 0)
652	{	804	{
…		…
655	pread (fd, aio_buf, len, offset);	807	pread (fd, aio_buf, len, offset);
656	offset += len;	808	offset += len;
657	count -= len;	809	count -= len;
658	}	810	}
659		811
660	fBUF;
661
662	errno = 0;	812	errno = 0;
663	}	813	}
		814
664	#endif	815	#endif
665		816
666	#if !HAVE_READDIR_R	817	#if !HAVE_READDIR_R
667	# define readdir_r aio_readdir_r	818	# define readdir_r aio_readdir_r
668		819
…		…
671	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)	822	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
672	{	823	{
673	struct dirent *e;	824	struct dirent *e;
674	int errorno;	825	int errorno;
675		826
676	pthread_mutex_lock (&readdirlock);	827	LOCK (readdirlock);
677		828
678	e = readdir (dirp);	829	e = readdir (dirp);
679	errorno = errno;	830	errorno = errno;
680		831
681	if (e)	832	if (e)
…		…
684	strcpy (ent->d_name, e->d_name);	835	strcpy (ent->d_name, e->d_name);
685	}	836	}
686	else	837	else
687	*res = 0;	838	*res = 0;
688		839
689	pthread_mutex_unlock (&readdirlock);	840	UNLOCK (readdirlock);
690		841
691	errno = errorno;	842	errno = errorno;
692	return e ? 0 : -1;	843	return e ? 0 : -1;
693	}	844	}
694	#endif	845	#endif
695		846
696	/* sendfile always needs emulation */	847	/* sendfile always needs emulation */
697	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	848	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
698	{	849	{
699	ssize_t res;	850	ssize_t res;
700		851
701	if (!count)	852	if (!count)
702	return 0;	853	return 0;
…		…
713	{	864	{
714	off_t sbytes;	865	off_t sbytes;
715	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
716		867
717	if (res < 0 && sbytes)	868	if (res < 0 && sbytes)
718	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
719	res = sbytes;	870	res = sbytes;
720	}	871	}
721		872
722	# elif __hpux	873	# elif __hpux
723	res = sendfile (ofd, ifd, offset, count, 0, 0);	874	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
779		930
780	offset += cnt;	931	offset += cnt;
781	res += cnt;	932	res += cnt;
782	count -= cnt;	933	count -= cnt;
783	}	934	}
784
785	fBUF;
786	}	935	}
787		936
788	return res;	937	return res;
789	}	938	}
790		939
791	/* read a full directory */	940	/* read a full directory */
792	static int scandir_ (const char path, void *namesp)	941	static void scandir_ (aio_req req, worker *self)
793	{	942	{
794	DIR *dirp;	943	DIR *dirp;
795	union	944	union
796	{	945	{
797	struct dirent d;	946	struct dirent d;
…		…
802	int memlen = 4096;	951	int memlen = 4096;
803	int memofs = 0;	952	int memofs = 0;
804	int res = 0;	953	int res = 0;
805	int errorno;	954	int errorno;
806		955
807	dirp = opendir (path);	956	LOCK (wrklock);
808	if (!dirp)	957	self->dirp = dirp = opendir (req->dataptr);
809	return -1;
810
811	u = malloc (sizeof (*u));	958	self->dbuf = u = malloc (sizeof (*u));
812	names = malloc (memlen);	959	req->data2ptr = names = malloc (memlen);
		960	UNLOCK (wrklock);
813		961
814	if (u && names)	962	if (dirp && u && names)
815	for (;;)	963	for (;;)
816	{	964	{
817	errno = 0;	965	errno = 0;
818	readdir_r (dirp, &u->d, &entp);	966	readdir_r (dirp, &u->d, &entp);
819		967
…		…
829	res++;	977	res++;
830		978
831	while (memofs + len > memlen)	979	while (memofs + len > memlen)
832	{	980	{
833	memlen *= 2;	981	memlen *= 2;
		982	LOCK (wrklock);
834	names = realloc (names, memlen);	983	req->data2ptr = names = realloc (names, memlen);
		984	UNLOCK (wrklock);
		985
835	if (!names)	986	if (!names)
836	break;	987	break;
837	}	988	}
838		989
839	memcpy (names + memofs, name, len);	990	memcpy (names + memofs, name, len);
840	memofs += len;	991	memofs += len;
841	}	992	}
842	}	993	}
843		994
844	errorno = errno;
845	free (u);
846	closedir (dirp);
847
848	if (errorno)	995	if (errno)
849	{
850	free (names);
851	errno = errorno;
852	res = -1;	996	res = -1;
853	}	997
854		998	req->result = res;
855	namesp = (void )names;
856	return res;
857	}	999	}
858		1000
859	/*****************************************************************************/	1001	/*****************************************************************************/
860		1002
861	static void aio_proc (void thr_arg)	1003	static void aio_proc (void thr_arg)
862	{	1004	{
863	aio_req req;	1005	aio_req req;
864	int type;	1006	worker self = (worker )thr_arg;
865		1007
866	do	1008	for (;;)
867	{	1009	{
868	pthread_mutex_lock (&reqlock);	1010	LOCK (reqlock);
869		1011
870	for (;;)	1012	for (;;)
871	{	1013	{
872	req = reqq_shift (&req_queue);	1014	self->req = req = reqq_shift (&req_queue);
873		1015
874	if (req)	1016	if (req)
875	break;	1017	break;
876		1018
877	pthread_cond_wait (&reqwait, &reqlock);	1019	pthread_cond_wait (&reqwait, &reqlock);
878	}	1020	}
879		1021
880	pthread_mutex_unlock (&reqlock);	1022	--nready;
		1023
		1024	UNLOCK (reqlock);
881		1025
882	errno = 0; /* strictly unnecessary */	1026	errno = 0; /* strictly unnecessary */
883	type = req->type; /* remember type for QUIT check */
884		1027
885	if (!(req->flags & FLAG_CANCELLED))	1028	if (!(req->flags & FLAG_CANCELLED))
886	switch (type)	1029	switch (req->type)
887	{	1030	{
888	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1031	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
889	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1032	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
890		1033
891	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1034	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
892	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1035	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
893		1036
894	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
895	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
896	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
897		1040
…		…
900	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1043	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
901	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1044	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
902	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1045	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
903	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1046	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
904	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1047	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1048	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
905		1049
906	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1050	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
907	case REQ_FSYNC: req->result = fsync (req->fd); break;	1051	case REQ_FSYNC: req->result = fsync (req->fd); break;
908	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1052	case REQ_READDIR: scandir_ (req, self); break;
909		1053
910	case REQ_BUSY:	1054	case REQ_BUSY:
911	{	1055	{
912	struct timeval tv;	1056	struct timeval tv;
913		1057
…		…
917	req->result = select (0, 0, 0, 0, &tv);	1061	req->result = select (0, 0, 0, 0, &tv);
918	}	1062	}
919		1063
920	case REQ_GROUP:	1064	case REQ_GROUP:
921	case REQ_NOP:	1065	case REQ_NOP:
		1066	break;
		1067
922	case REQ_QUIT:	1068	case REQ_QUIT:
		1069	LOCK (wrklock);
		1070	worker_free (self);
		1071	--started;
		1072	UNLOCK (wrklock);
923	break;	1073	return 0;
924		1074
925	default:	1075	default:
926	req->result = ENOSYS;	1076	req->result = ENOSYS;
927	break;	1077	break;
928	}	1078	}
929		1079
930	req->errorno = errno;	1080	req->errorno = errno;
931		1081
932	pthread_mutex_lock (&reslock);	1082	LOCK (reslock);
		1083
		1084	++npending;
933		1085
934	if (!reqq_push (&res_queue, req))	1086	if (!reqq_push (&res_queue, req))
935	/* write a dummy byte to the pipe so fh becomes ready */	1087	/* write a dummy byte to the pipe so fh becomes ready */
936	write (respipe [1], &respipe, 1);	1088	write (respipe [1], &respipe, 1);
937		1089
938	pthread_mutex_unlock (&reslock);	1090	self->req = 0;
939	}	1091	worker_clear (self);
940	while (type != REQ_QUIT);
941		1092
942	return 0;	1093	UNLOCK (reslock);
		1094	}
943	}	1095	}
944		1096
945	/*****************************************************************************/	1097	/*****************************************************************************/
946		1098
947	static void atfork_prepare (void)	1099	static void atfork_prepare (void)
948	{	1100	{
949	pthread_mutex_lock (&reqlock);	1101	LOCK (wrklock);
950	pthread_mutex_lock (&reslock);	1102	LOCK (reqlock);
		1103	LOCK (reslock);
951	#if !HAVE_PREADWRITE	1104	#if !HAVE_PREADWRITE
952	pthread_mutex_lock (&preadwritelock);	1105	LOCK (preadwritelock);
953	#endif	1106	#endif
954	#if !HAVE_READDIR_R	1107	#if !HAVE_READDIR_R
955	pthread_mutex_lock (&readdirlock);	1108	LOCK (readdirlock);
956	#endif	1109	#endif
957	}	1110	}
958		1111
959	static void atfork_parent (void)	1112	static void atfork_parent (void)
960	{	1113	{
961	#if !HAVE_READDIR_R	1114	#if !HAVE_READDIR_R
962	pthread_mutex_unlock (&readdirlock);	1115	UNLOCK (readdirlock);
963	#endif	1116	#endif
964	#if !HAVE_PREADWRITE	1117	#if !HAVE_PREADWRITE
965	pthread_mutex_unlock (&preadwritelock);	1118	UNLOCK (preadwritelock);
966	#endif	1119	#endif
967	pthread_mutex_unlock (&reslock);	1120	UNLOCK (reslock);
968	pthread_mutex_unlock (&reqlock);	1121	UNLOCK (reqlock);
		1122	UNLOCK (wrklock);
969	}	1123	}
970		1124
971	static void atfork_child (void)	1125	static void atfork_child (void)
972	{	1126	{
973	aio_req prv;	1127	aio_req prv;
974
975	started = 0;
976		1128
977	while (prv = reqq_shift (&req_queue))	1129	while (prv = reqq_shift (&req_queue))
978	req_free (prv);	1130	req_free (prv);
979		1131
980	while (prv = reqq_shift (&res_queue))	1132	while (prv = reqq_shift (&res_queue))
981	req_free (prv);	1133	req_free (prv);
982		1134
		1135	while (wrk_first.next != &wrk_first)
		1136	{
		1137	worker *wrk = wrk_first.next;
		1138
		1139	if (wrk->req)
		1140	req_free (wrk->req);
		1141
		1142	worker_clear (wrk);
		1143	worker_free (wrk);
		1144	}
		1145
		1146	started = 0;
		1147	nreqs = 0;
		1148
983	close (respipe [0]);	1149	close (respipe [0]);
984	close (respipe [1]);	1150	close (respipe [1]);
985	create_pipe ();	1151	create_pipe ();
986		1152
987	atfork_parent ();	1153	atfork_parent ();
…		…
1016	{	1182	{
1017	HV *stash = gv_stashpv ("IO::AIO", 1);	1183	HV *stash = gv_stashpv ("IO::AIO", 1);
1018	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1184	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1019	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1185	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1020	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1186	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1187	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1188	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1021		1189
1022	create_pipe ();	1190	create_pipe ();
1023	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1191	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1024	}
1025		1192
		1193	start_thread ();
		1194	}
		1195
1026	void	1196	void
1027	min_parallel (nthreads)	1197	min_parallel (int nthreads)
1028	int nthreads
1029	PROTOTYPE: $	1198	PROTOTYPE: $
1030		1199
1031	void	1200	void
1032	max_parallel (nthreads)	1201	max_parallel (int nthreads)
1033	int nthreads
1034	PROTOTYPE: $	1202	PROTOTYPE: $
1035		1203
1036	int	1204	int
1037	max_outstanding (nreqs)	1205	max_outstanding (int maxreqs)
1038	int nreqs	1206	PROTOTYPE: $
1039	PROTOTYPE: $
1040	CODE:	1207	CODE:
1041	RETVAL = max_outstanding;	1208	RETVAL = max_outstanding;
1042	max_outstanding = nreqs;	1209	max_outstanding = maxreqs;
		1210	OUTPUT:
		1211	RETVAL
1043		1212
1044	void	1213	void
1045	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1214	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1046	SV * pathname	1215	SV * pathname
1047	int flags	1216	int flags
…		…
1262		1431
1263	REQ_SEND;	1432	REQ_SEND;
1264	}	1433	}
1265		1434
1266	void	1435	void
		1436	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1437	SV * pathname
		1438	SV * callback
		1439	UV mode
		1440	UV dev
		1441	PPCODE:
		1442	{
		1443	dREQ;
		1444
		1445	req->type = REQ_MKNOD;
		1446	req->data = newSVsv (pathname);
		1447	req->dataptr = SvPVbyte_nolen (req->data);
		1448	req->mode = (mode_t)mode;
		1449	req->offset = dev;
		1450
		1451	REQ_SEND;
		1452	}
		1453
		1454	void
1267	aio_busy (delay,callback=&PL_sv_undef)	1455	aio_busy (delay,callback=&PL_sv_undef)
1268	double delay	1456	double delay
1269	SV * callback	1457	SV * callback
1270	PPCODE:	1458	PPCODE:
1271	{	1459	{
…		…
1302	req->type = REQ_NOP;	1490	req->type = REQ_NOP;
1303		1491
1304	REQ_SEND;	1492	REQ_SEND;
1305	}	1493	}
1306		1494
1307	void	1495	int
1308	aioreq_pri (int pri = DEFAULT_PRI)	1496	aioreq_pri (int pri = 0)
1309	CODE:	1497	PROTOTYPE: ;$
		1498	CODE:
		1499	RETVAL = next_pri - PRI_BIAS;
		1500	if (items > 0)
		1501	{
1310	if (pri < PRI_MIN) pri = PRI_MIN;	1502	if (pri < PRI_MIN) pri = PRI_MIN;
1311	if (pri > PRI_MAX) pri = PRI_MAX;	1503	if (pri > PRI_MAX) pri = PRI_MAX;
1312	next_pri = pri + PRI_BIAS;	1504	next_pri = pri + PRI_BIAS;
		1505	}
		1506	OUTPUT:
		1507	RETVAL
1313		1508
1314	void	1509	void
1315	aioreq_nice (int nice = 0)	1510	aioreq_nice (int nice = 0)
1316	CODE:	1511	CODE:
1317	nice = next_pri - nice;	1512	nice = next_pri - nice;
1318	if (nice < PRI_MIN) nice = PRI_MIN;	1513	if (nice < PRI_MIN) nice = PRI_MIN;
1319	if (nice > PRI_MAX) nice = PRI_MAX;	1514	if (nice > PRI_MAX) nice = PRI_MAX;
1320	next_pri = nice + PRI_BIAS;	1515	next_pri = nice + PRI_BIAS;
1321		1516
1322	void	1517	void
1323	flush ()	1518	flush ()
1324	PROTOTYPE:	1519	PROTOTYPE:
1325	CODE:	1520	CODE:
1326	while (nreqs)	1521	while (nreqs)
1327	{	1522	{
1328	poll_wait ();	1523	poll_wait ();
1329	poll_cb ();	1524	poll_cb (0);
1330	}	1525	}
1331		1526
1332	void	1527	void
1333	poll()	1528	poll()
1334	PROTOTYPE:	1529	PROTOTYPE:
1335	CODE:	1530	CODE:
1336	if (nreqs)	1531	if (nreqs)
1337	{	1532	{
1338	poll_wait ();	1533	poll_wait ();
1339	poll_cb ();	1534	poll_cb (0);
1340	}	1535	}
1341		1536
1342	int	1537	int
1343	poll_fileno()	1538	poll_fileno()
1344	PROTOTYPE:	1539	PROTOTYPE:
…		…
1349		1544
1350	int	1545	int
1351	poll_cb(...)	1546	poll_cb(...)
1352	PROTOTYPE:	1547	PROTOTYPE:
1353	CODE:	1548	CODE:
1354	RETVAL = poll_cb ();	1549	RETVAL = poll_cb (0);
		1550	OUTPUT:
		1551	RETVAL
		1552
		1553	int
		1554	poll_some(int max = 0)
		1555	PROTOTYPE: $
		1556	CODE:
		1557	RETVAL = poll_cb (max);
1355	OUTPUT:	1558	OUTPUT:
1356	RETVAL	1559	RETVAL
1357		1560
1358	void	1561	void
1359	poll_wait()	1562	poll_wait()
…		…
1368	CODE:	1571	CODE:
1369	RETVAL = nreqs;	1572	RETVAL = nreqs;
1370	OUTPUT:	1573	OUTPUT:
1371	RETVAL	1574	RETVAL
1372		1575
		1576	int
		1577	nready()
		1578	PROTOTYPE:
		1579	CODE:
		1580	RETVAL = get_nready ();
		1581	OUTPUT:
		1582	RETVAL
		1583
		1584	int
		1585	npending()
		1586	PROTOTYPE:
		1587	CODE:
		1588	RETVAL = get_npending ();
		1589	OUTPUT:
		1590	RETVAL
		1591
1373	PROTOTYPES: DISABLE	1592	PROTOTYPES: DISABLE
1374		1593
1375	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1594	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1376		1595
1377	void	1596	void
…		…
1419	}	1638	}
1420	}	1639	}
1421	}	1640	}
1422		1641
1423	void	1642	void
		1643	cancel_subs (aio_req_ornot req)
		1644	CODE:
		1645	req_cancel_subs (req);
		1646
		1647	void
1424	result (aio_req grp, ...)	1648	result (aio_req grp, ...)
1425	CODE:	1649	CODE:
1426	{	1650	{
1427	int i;	1651	int i;
		1652	AV *av;
		1653
		1654	grp->errorno = errno;
		1655
1428	AV *av = newAV ();	1656	av = newAV ();
1429		1657
1430	for (i = 1; i < items; ++i )	1658	for (i = 1; i < items; ++i )
1431	av_push (av, newSVsv (ST (i)));	1659	av_push (av, newSVsv (ST (i)));
1432		1660
1433	SvREFCNT_dec (grp->data);	1661	SvREFCNT_dec (grp->data);
1434	grp->data = (SV *)av;	1662	grp->data = (SV *)av;
1435	}	1663	}
		1664
		1665	void
		1666	errno (aio_req grp, int errorno = errno)
		1667	CODE:
		1668	grp->errorno = errorno;
1436		1669
1437	void	1670	void
1438	limit (aio_req grp, int limit)	1671	limit (aio_req grp, int limit)
1439	CODE:	1672	CODE:
1440	grp->fd2 = limit;	1673	grp->fd2 = limit;

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.69 by root, Tue Oct 24 11:57:30 2006 UTC vs. Revision 1.81 by root, Fri Oct 27 20:10:06 2006 UTC

Diff Legend

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.69 by root, Tue Oct 24 11:57:30 2006 UTC vs.
Revision 1.81 by root, Fri Oct 27 20:10:06 2006 UTC