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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.31 by root, Thu Aug 18 16:34:53 2005 UTC vs.
Revision 1.39 by root, Mon Feb 6 23:54:12 2006 UTC

…		…
5	#include "perl.h"	5	#include "perl.h"
6	#include "XSUB.h"	6	#include "XSUB.h"
7		7
8	#include "autoconf/config.h"	8	#include "autoconf/config.h"
9		9
		10	#include <pthread.h>
		11
		12	#include <stddef.h>
10	#include <sys/types.h>	13	#include <sys/types.h>
11	#include <sys/stat.h>	14	#include <sys/stat.h>
12		15	#include <limits.h>
13	#include <unistd.h>	16	#include <unistd.h>
14	#include <fcntl.h>	17	#include <fcntl.h>
15	#include <signal.h>	18	#include <signal.h>
16	#include <sched.h>	19	#include <sched.h>
17		20
18	#include <pthread.h>	21	#if HAVE_SENDFILE
		22	# if __linux
		23	# include <sys/sendfile.h>
		24	# elif __freebsd
		25	# include <sys/socket.h>
		26	# include <sys/uio.h>
		27	# elif __hpux
		28	# include <sys/socket.h>
		29	# elif __solaris /* not yet */
		30	# include <sys/sendfile.h>
		31	# else
		32	# error sendfile support requested but not available
		33	# endif
		34	#endif
19		35
20	typedef void InputStream; / hack, but 5.6.1 is simply toooo old ;) */	36	/* used for struct dirent, AIX doesn't provide it */
21	typedef void OutputStream; / hack, but 5.6.1 is simply toooo old ;) */	37	#ifndef NAME_MAX
22	typedef void InOutStream; / hack, but 5.6.1 is simply toooo old ;) */	38	# define NAME_MAX 4096
		39	#endif
23		40
24	#if __ia64	41	#if __ia64
25	# define STACKSIZE 65536	42	# define STACKSIZE 65536
26	#else	43	#else
27	# define STACKSIZE 4096	44	# define STACKSIZE 8192
28	#endif	45	#endif
29		46
30	enum {	47	enum {
31	REQ_QUIT,	48	REQ_QUIT,
32	REQ_OPEN, REQ_CLOSE,	49	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,	50	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		51	REQ_SENDFILE,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	52	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,	53	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,	54	REQ_UNLINK, REQ_RMDIR,
		55	REQ_READDIR,
37	REQ_SYMLINK,	56	REQ_SYMLINK,
38	};	57	};
39		58
40	typedef struct aio_cb {	59	typedef struct aio_cb {
41	struct aio_cb *volatile next;	60	struct aio_cb *volatile next;
42		61
43	int type;	62	int type;
44		63
		64	/* should receive a cleanup, with unions */
45	int fd;	65	int fd, fd2;
46	off_t offset;	66	off_t offset;
47	size_t length;	67	size_t length;
48	ssize_t result;	68	ssize_t result;
49	mode_t mode; /* open */	69	mode_t mode; /* open */
50	int errorno;	70	int errorno;
51	SV data, callback, *fh;	71	SV data, callback;
		72	SV fh, fh2;
52	void dataptr, data2ptr;	73	void dataptr, data2ptr;
53	STRLEN dataoffset;	74	STRLEN dataoffset;
54		75
55	Stat_t *statdata;	76	Stat_t *statdata;
56	} aio_cb;	77	} aio_cb;
…		…
75	SvREFCNT_dec (req->data);	96	SvREFCNT_dec (req->data);
76		97
77	if (req->fh)	98	if (req->fh)
78	SvREFCNT_dec (req->fh);	99	SvREFCNT_dec (req->fh);
79		100
		101	if (req->fh2)
		102	SvREFCNT_dec (req->fh2);
		103
80	if (req->statdata)	104	if (req->statdata)
81	Safefree (req->statdata);	105	Safefree (req->statdata);
82		106
83	if (req->callback)	107	if (req->callback)
84	SvREFCNT_dec (req->callback);	108	SvREFCNT_dec (req->callback);
		109
		110	if (req->type == REQ_READDIR && req->result >= 0)
		111	free (req->data2ptr);
85		112
86	Safefree (req);	113	Safefree (req);
87	}	114	}
88		115
89	static void	116	static void
…		…
154	PL_statcache = *(req->statdata);	181	PL_statcache = *(req->statdata);
155	}	182	}
156		183
157	ENTER;	184	ENTER;
158	PUSHMARK (SP);	185	PUSHMARK (SP);
159	XPUSHs (sv_2mortal (newSViv (req->result)));
160		186
161	if (req->type == REQ_OPEN)	187	if (req->type == REQ_READDIR)
162	{	188	{
		189	SV *rv = &PL_sv_undef;
		190
		191	if (req->result >= 0)
		192	{
		193	char *buf = req->data2ptr;
		194	AV *av = newAV ();
		195
		196	while (req->result)
		197	{
		198	SV *sv = newSVpv (buf, 0);
		199
		200	av_push (av, sv);
		201	buf += SvCUR (sv) + 1;
		202	req->result--;
		203	}
		204
		205	rv = sv_2mortal (newRV_noinc ((SV *)av));
		206	}
		207
		208	XPUSHs (rv);
		209	}
		210	else
		211	{
		212	XPUSHs (sv_2mortal (newSViv (req->result)));
		213
		214	if (req->type == REQ_OPEN)
		215	{
163	/* convert fd to fh */	216	/* convert fd to fh */
164	SV *fh;	217	SV *fh;
165		218
166	PUTBACK;	219	PUTBACK;
167	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);	220	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
168	SPAGAIN;	221	SPAGAIN;
169		222
170	fh = SvREFCNT_inc (POPs);	223	fh = SvREFCNT_inc (POPs);
171		224
172	PUSHMARK (SP);	225	PUSHMARK (SP);
173	XPUSHs (sv_2mortal (fh));	226	XPUSHs (sv_2mortal (fh));
		227	}
174	}	228	}
175		229
176	if (SvOK (req->callback))	230	if (SvOK (req->callback))
177	{	231	{
178	PUTBACK;	232	PUTBACK;
…		…
301		355
302	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	356	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
303	croak ("cannot set result pipe to nonblocking mode");	357	croak ("cannot set result pipe to nonblocking mode");
304	}	358	}
305		359
306	static void atfork_prepare (void)
307	{
308	pthread_mutex_lock (&reqlock);
309	pthread_mutex_lock (&reslock);
310	}
311
312	static void atfork_parent (void)
313	{
314	pthread_mutex_unlock (&reslock);
315	pthread_mutex_unlock (&reqlock);
316	}
317
318	static void atfork_child (void)
319	{
320	aio_req prv;
321
322	started = 0;
323
324	while (reqs)
325	{
326	prv = reqs;
327	reqs = prv->next;
328	free_req (prv);
329	}
330
331	reqs = reqe = 0;
332
333	while (ress)
334	{
335	prv = ress;
336	ress = prv->next;
337	free_req (prv);
338	}
339
340	ress = rese = 0;
341
342	close (respipe [0]);
343	close (respipe [1]);
344	create_pipe ();
345
346	atfork_parent ();
347	}
348
349	/*****************************************************************************/	360	/*****************************************************************************/
350	/* work around various missing functions */	361	/* work around various missing functions */
351		362
352	#if !HAVE_PREADWRITE	363	#if !HAVE_PREADWRITE
353	# define pread aio_pread	364	# define pread aio_pread
…		…
356	/*	367	/*
357	* make our pread/pwrite safe against themselves, but not against	368	* make our pread/pwrite safe against themselves, but not against
358	* normal read/write by using a mutex. slows down execution a lot,	369	* normal read/write by using a mutex. slows down execution a lot,
359	* but that's your problem, not mine.	370	* but that's your problem, not mine.
360	*/	371	*/
361	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	372	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
362		373
363	static ssize_t	374	static ssize_t
364	pread (int fd, void *buf, size_t count, off_t offset)	375	pread (int fd, void *buf, size_t count, off_t offset)
365	{	376	{
366	ssize_t res;	377	ssize_t res;
367	off_t ooffset;	378	off_t ooffset;
368		379
369	pthread_mutex_lock (&iolock);	380	pthread_mutex_lock (&preadwritelock);
370	ooffset = lseek (fd, 0, SEEK_CUR);	381	ooffset = lseek (fd, 0, SEEK_CUR);
371	lseek (fd, offset, SEEK_SET);	382	lseek (fd, offset, SEEK_SET);
372	res = read (fd, buf, count);	383	res = read (fd, buf, count);
373	lseek (fd, ooffset, SEEK_SET);	384	lseek (fd, ooffset, SEEK_SET);
374	pthread_mutex_unlock (&iolock);	385	pthread_mutex_unlock (&preadwritelock);
375		386
376	return res;	387	return res;
377	}	388	}
378		389
379	static ssize_t	390	static ssize_t
380	pwrite (int fd, void *buf, size_t count, off_t offset)	391	pwrite (int fd, void *buf, size_t count, off_t offset)
381	{	392	{
382	ssize_t res;	393	ssize_t res;
383	off_t ooffset;	394	off_t ooffset;
384		395
385	pthread_mutex_lock (&iolock);	396	pthread_mutex_lock (&preadwritelock);
386	ooffset = lseek (fd, 0, SEEK_CUR);	397	ooffset = lseek (fd, 0, SEEK_CUR);
387	lseek (fd, offset, SEEK_SET);	398	lseek (fd, offset, SEEK_SET);
388	res = write (fd, buf, count);	399	res = write (fd, buf, count);
389	lseek (fd, offset, SEEK_SET);	400	lseek (fd, offset, SEEK_SET);
390	pthread_mutex_unlock (&iolock);	401	pthread_mutex_unlock (&preadwritelock);
391		402
392	return res;	403	return res;
393	}	404	}
394	#endif	405	#endif
395		406
…		…
398	#endif	409	#endif
399		410
400	#if !HAVE_READAHEAD	411	#if !HAVE_READAHEAD
401	# define readahead aio_readahead	412	# define readahead aio_readahead
402		413
403	static char readahead_buf[4096];
404
405	static ssize_t	414	static ssize_t
406	readahead (int fd, off_t offset, size_t count)	415	readahead (int fd, off_t offset, size_t count)
407	{	416	{
		417	char readahead_buf[4096];
		418
408	while (count > 0)	419	while (count > 0)
409	{	420	{
410	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	421	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
411		422
412	pread (fd, readahead_buf, len, offset);	423	pread (fd, readahead_buf, len, offset);
…		…
415	}	426	}
416		427
417	errno = 0;	428	errno = 0;
418	}	429	}
419	#endif	430	#endif
		431
		432	#if !HAVE_READDIR_R
		433	# define readdir_r aio_readdir_r
		434
		435	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		436
		437	static int
		438	readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
		439	{
		440	struct dirent *e;
		441	int errorno;
		442
		443	pthread_mutex_lock (&readdirlock);
		444
		445	e = readdir (dirp);
		446	errorno = errno;
		447
		448	if (e)
		449	{
		450	*res = ent;
		451	strcpy (ent->d_name, e->d_name);
		452	}
		453	else
		454	*res = 0;
		455
		456	pthread_mutex_unlock (&readdirlock);
		457
		458	errno = errorno;
		459	return e ? 0 : -1;
		460	}
		461	#endif
		462
		463	/* sendfile always needs emulation */
		464	static ssize_t
		465	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
		466	{
		467	ssize_t res;
		468
		469	if (!count)
		470	return 0;
		471
		472	#if HAVE_SENDFILE
		473	# if __linux
		474	res = sendfile (ofd, ifd, &offset, count);
		475
		476	# elif __freebsd
		477	/*
		478	* Of course, the freebsd sendfile is a dire hack with no thoughts
		479	* wasted on making it similar to other I/O functions.
		480	*/
		481	{
		482	off_t sbytes;
		483	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		484
		485	if (res < 0 && sbytes)
		486	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
		487	res = sbytes;
		488	}
		489
		490	# elif __hpux
		491	res = sendfile (ofd, ifd, offset, count, 0, 0);
		492
		493	# elif __solaris
		494	{
		495	struct sendfilevec vec;
		496	size_t sbytes;
		497
		498	vec.sfv_fd = ifd;
		499	vec.sfv_flag = 0;
		500	vec.sfv_off = offset;
		501	vec.sfv_len = count;
		502
		503	res = sendfilev (ofd, &vec, 1, &sbytes);
		504
		505	if (res < 0 && sbytes)
		506	res = sbytes;
		507	}
		508
		509	# endif
		510	#else
		511	res = -1;
		512	errno = ENOSYS;
		513	#endif
		514
		515	if (res < 0
		516	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK
		517	#if __solaris
		518	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE
		519	#endif
		520	)
		521	)
		522	{
		523	/* emulate sendfile. this is a major pain in the ass */
		524	char buf[4096];
		525	res = 0;
		526
		527	while (count)
		528	{
		529	ssize_t cnt;
		530
		531	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
		532
		533	if (cnt <= 0)
		534	{
		535	if (cnt && !res) res = -1;
		536	break;
		537	}
		538
		539	cnt = write (ofd, buf, cnt);
		540
		541	if (cnt <= 0)
		542	{
		543	if (cnt && !res) res = -1;
		544	break;
		545	}
		546
		547	offset += cnt;
		548	res += cnt;
		549	count -= cnt;
		550	}
		551	}
		552
		553	return res;
		554	}
		555
		556	/* read a full directory */
		557	static int
		558	scandir_ (const char path, void *namesp)
		559	{
		560	DIR *dirp = opendir (path);
		561	union
		562	{
		563	struct dirent d;
		564	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		565	} u;
		566	struct dirent *entp;
		567	char name, names;
		568	int memlen = 4096;
		569	int memofs = 0;
		570	int res = 0;
		571	int errorno;
		572
		573	if (!dirp)
		574	return -1;
		575
		576	names = malloc (memlen);
		577
		578	for (;;)
		579	{
		580	errno = 0, readdir_r (dirp, &u.d, &entp);
		581
		582	if (!entp)
		583	break;
		584
		585	name = entp->d_name;
		586
		587	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
		588	{
		589	int len = strlen (name) + 1;
		590
		591	res++;
		592
		593	while (memofs + len > memlen)
		594	{
		595	memlen *= 2;
		596	names = realloc (names, memlen);
		597	if (!names)
		598	break;
		599	}
		600
		601	memcpy (names + memofs, name, len);
		602	memofs += len;
		603	}
		604	}
		605
		606	errorno = errno;
		607	closedir (dirp);
		608
		609	if (errorno)
		610	{
		611	free (names);
		612	errno = errorno;
		613	res = -1;
		614	}
		615
		616	namesp = (void )names;
		617	return res;
		618	}
420		619
421	/*****************************************************************************/	620	/*****************************************************************************/
422		621
423	static void *	622	static void *
424	aio_proc (void *thr_arg)	623	aio_proc (void *thr_arg)
…		…
456	{	655	{
457	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	656	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
458	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	657	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
459		658
460	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	659	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
		660	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
461		661
462	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	662	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
463	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	663	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
464	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	664	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
465		665
…		…
469	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	669	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
470	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	670	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
471		671
472	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	672	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
473	case REQ_FSYNC: req->result = fsync (req->fd); break;	673	case REQ_FSYNC: req->result = fsync (req->fd); break;
		674	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
474		675
475	case REQ_QUIT:	676	case REQ_QUIT:
476	break;	677	break;
477		678
478	default:	679	default:
…		…
502	pthread_mutex_unlock (&reslock);	703	pthread_mutex_unlock (&reslock);
503	}	704	}
504	while (type != REQ_QUIT);	705	while (type != REQ_QUIT);
505		706
506	return 0;	707	return 0;
		708	}
		709
		710	/*****************************************************************************/
		711
		712	static void atfork_prepare (void)
		713	{
		714	pthread_mutex_lock (&reqlock);
		715	pthread_mutex_lock (&reslock);
		716	#if !HAVE_PREADWRITE
		717	pthread_mutex_lock (&preadwritelock);
		718	#endif
		719	#if !HAVE_READDIR_R
		720	pthread_mutex_lock (&readdirlock);
		721	#endif
		722	}
		723
		724	static void atfork_parent (void)
		725	{
		726	#if !HAVE_READDIR_R
		727	pthread_mutex_unlock (&readdirlock);
		728	#endif
		729	#if !HAVE_PREADWRITE
		730	pthread_mutex_unlock (&preadwritelock);
		731	#endif
		732	pthread_mutex_unlock (&reslock);
		733	pthread_mutex_unlock (&reqlock);
		734	}
		735
		736	static void atfork_child (void)
		737	{
		738	aio_req prv;
		739
		740	started = 0;
		741
		742	while (reqs)
		743	{
		744	prv = reqs;
		745	reqs = prv->next;
		746	free_req (prv);
		747	}
		748
		749	reqs = reqe = 0;
		750
		751	while (ress)
		752	{
		753	prv = ress;
		754	ress = prv->next;
		755	free_req (prv);
		756	}
		757
		758	ress = rese = 0;
		759
		760	close (respipe [0]);
		761	close (respipe [1]);
		762	create_pipe ();
		763
		764	atfork_parent ();
507	}	765	}
508		766
509	#define dREQ \	767	#define dREQ \
510	aio_req req; \	768	aio_req req; \
511	\	769	\
…		…
588		846
589	void	847	void
590	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	848	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
591	SV * fh	849	SV * fh
592	UV offset	850	UV offset
593	IV length	851	UV length
594	SV * data	852	SV * data
595	IV dataoffset	853	UV dataoffset
596	SV * callback	854	SV * callback
597	ALIAS:	855	ALIAS:
598	aio_read = REQ_READ	856	aio_read = REQ_READ
599	aio_write = REQ_WRITE	857	aio_write = REQ_WRITE
600	PROTOTYPE: $$$$$;$	858	PROTOTYPE: $$$$$;$
…		…
646	req->data2ptr = (void *)data;	904	req->data2ptr = (void *)data;
647	}	905	}
648		906
649	send_req (req);	907	send_req (req);
650	}	908	}
		909	}
		910
		911	void
		912	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		913	SV * out_fh
		914	SV * in_fh
		915	UV in_offset
		916	UV length
		917	SV * callback
		918	PROTOTYPE: $$$$;$
		919	CODE:
		920	{
		921	dREQ;
		922
		923	req->type = REQ_SENDFILE;
		924	req->fh = newSVsv (out_fh);
		925	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		926	req->fh2 = newSVsv (in_fh);
		927	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		928	req->offset = in_offset;
		929	req->length = length;
		930
		931	send_req (req);
651	}	932	}
652		933
653	void	934	void
654	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	935	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
655	SV * fh	936	SV * fh
…		…
739		1020
740	send_req (req);	1021	send_req (req);
741	}	1022	}
742		1023
743	void	1024	void
		1025	aio_readdir(pathname,callback=&PL_sv_undef)
		1026	SV * pathname
		1027	SV * callback
		1028	CODE:
		1029	{
		1030	dREQ;
		1031
		1032	req->type = REQ_READDIR;
		1033	req->data = newSVsv (pathname);
		1034	req->dataptr = SvPVbyte_nolen (req->data);
		1035
		1036	send_req (req);
		1037	}
		1038
		1039	void
744	flush()	1040	flush()
745	PROTOTYPE:	1041	PROTOTYPE:
746	CODE:	1042	CODE:
747	while (nreqs)	1043	while (nreqs)
748	{	1044	{

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.31 by root, Thu Aug 18 16:34:53 2005 UTC vs. Revision 1.39 by root, Mon Feb 6 23:54:12 2006 UTC

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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.31 by root, Thu Aug 18 16:34:53 2005 UTC vs.
Revision 1.39 by root, Mon Feb 6 23:54:12 2006 UTC