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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.3 by root, Sun Jul 10 20:07:11 2005 UTC vs.
Revision 1.44 by root, Sat Oct 21 23:20:29 2006 UTC

…		…
1	#define PERL_NO_GET_CONTEXT	1	#define _REENTRANT 1
		2	#include <errno.h>
2		3
3	#include "EXTERN.h"	4	#include "EXTERN.h"
4	#include "perl.h"	5	#include "perl.h"
5	#include "XSUB.h"	6	#include "XSUB.h"
6		7
		8	#include "autoconf/config.h"
		9
		10	#include <pthread.h>
		11
		12	#include <stddef.h>
		13	#include <errno.h>
7	#include <sys/types.h>	14	#include <sys/types.h>
8	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <limits.h>
9	#include <unistd.h>	17	#include <unistd.h>
10	#include <fcntl.h>	18	#include <fcntl.h>
11	#include <signal.h>	19	#include <signal.h>
12	#include <sched.h>	20	#include <sched.h>
13	#include <endian.h>
14		21
15	#include <pthread.h>	22	#if HAVE_SENDFILE
		23	# if __linux
		24	# include <sys/sendfile.h>
		25	# elif __freebsd
16	#include <sys/syscall.h>	26	# include <sys/socket.h>
		27	# include <sys/uio.h>
		28	# elif __hpux
		29	# include <sys/socket.h>
		30	# elif __solaris /* not yet */
		31	# include <sys/sendfile.h>
		32	# else
		33	# error sendfile support requested but not available
		34	# endif
		35	#endif
17		36
18	typedef void InputStream; / hack, but 5.6.1 is simply toooo old ;) */	37	/* used for struct dirent, AIX doesn't provide it */
19	typedef void OutputStream; / hack, but 5.6.1 is simply toooo old ;) */	38	#ifndef NAME_MAX
20	typedef void InOutStream; / hack, but 5.6.1 is simply toooo old ;) */	39	# define NAME_MAX 4096
		40	#endif
21		41
22	#if __i386 \|\| __amd64
23	# define STACKSIZE ( 256 * sizeof (long))
24	#elif __ia64	42	#if __ia64
25	# define STACKSIZE (8192 * sizeof (long))	43	# define STACKSIZE 65536
26	#else	44	#else
27	# define STACKSIZE ( 512 * sizeof (long))	45	# define STACKSIZE 8192
28	#endif	46	#endif
29		47
30	enum {	48	enum {
31	REQ_QUIT,	49	REQ_QUIT,
32	REQ_OPEN, REQ_CLOSE,	50	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,	51	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		52	REQ_SENDFILE,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,	53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,	54	REQ_FSYNC, REQ_FDATASYNC,
		55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
		56	REQ_READDIR,
		57	REQ_LINK, REQ_SYMLINK,
		58	REQ_GROUP,
36	};	59	};
37		60
		61	#define AIO_REQ_KLASS "IO::AIO::REQ"
		62	#define AIO_GRP_KLASS "IO::AIO::GRP"
		63
38	typedef struct aio_cb {	64	typedef struct aio_cb
		65	{
		66	struct aio_cb grp, grp_prev, *grp_next;
		67
39	struct aio_cb *volatile next;	68	struct aio_cb *volatile next;
40		69
41	int type;	70	SV self; / the perl counterpart of this request, if any */
42		71
43	int fd;	72	SV data, callback;
		73	SV fh, fh2;
		74	void dataptr, data2ptr;
		75	Stat_t *statdata;
44	off_t offset;	76	off_t offset;
45	size_t length;	77	size_t length;
46	ssize_t result;	78	ssize_t result;
		79
		80	int type;
		81	int fd, fd2;
		82	int errorno;
		83	STRLEN dataoffset;
47	mode_t mode; /* open */	84	mode_t mode; /* open */
48	int errorno;	85	unsigned char cancelled;
49	SV data, callback;
50	void *dataptr;
51	STRLEN dataoffset;
52
53	Stat_t *statdata;
54	} aio_cb;	86	} aio_cb;
55		87
56	typedef aio_cb *aio_req;	88	typedef aio_cb *aio_req;
		89	typedef aio_cb *aio_req_ornot;
		90	typedef aio_cb *aio_group;
57		91
58	static int started;	92	static int started, wanted;
59	static int nreqs;	93	static volatile int nreqs;
		94	static int max_outstanding = 1<<30;
60	static int respipe [2];	95	static int respipe [2];
61		96
62	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	97	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
63	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	98	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
64	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	99	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
65		100
66	static volatile aio_req reqs, reqe; /* queue start, queue end */	101	static volatile aio_req reqs, reqe; /* queue start, queue end */
67	static volatile aio_req ress, rese; /* queue start, queue end */	102	static volatile aio_req ress, rese; /* queue start, queue end */
68		103
69	static void aio_proc(void arg);	104	/* must be called at most once */
70		105	static SV req_sv (aio_req req, const char klass)
71	static void
72	start_thread (void)
73	{	106	{
74	sigset_t fullsigset, oldsigset;	107	req->self = (SV *)newHV ();
75	pthread_t tid;	108	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
76	pthread_attr_t attr;
77		109
78	pthread_attr_init (&attr);	110	return sv_2mortal (sv_bless (newRV_noinc (req->self), gv_stashpv (klass, 1)));
79	pthread_attr_setstacksize (&attr, STACKSIZE);
80	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
81
82	sigfillset (&fullsigset);
83	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
84
85	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
86	started++;
87
88	sigprocmask (SIG_SETMASK, &oldsigset, 0);
89	}	111	}
90		112
91	static void	113	static aio_req SvAIO_REQ (SV sv, const char klass)
92	send_req (aio_req req)
93	{	114	{
94	nreqs++;	115	if (!sv_derived_from (sv, klass) \|\| !SvROK (sv))
		116	croak ("object of class %s expected", klass);
95		117
96	pthread_mutex_lock (&reqlock);	118	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
97		119
98	req->next = 0;	120	return mg ? (aio_req)mg->mg_ptr : 0;
		121	}
99		122
		123	static void req_free (aio_req req)
		124	{
100	if (reqe)	125	if (req->self)
101	{
102	reqe->next = req;
103	reqe = req;
104	}	126	{
105	else	127	sv_unmagic (req->self, PERL_MAGIC_ext);
106	reqe = reqs = req;	128	SvREFCNT_dec (req->self);
107
108	pthread_cond_signal (&reqwait);
109	pthread_mutex_unlock (&reqlock);
110	}
111
112	static void
113	end_thread (void)
114	{
115	aio_req req;
116	New (0, req, 1, aio_cb);
117	req->type = REQ_QUIT;
118
119	send_req (req);
120	}
121
122	static void
123	read_write (pTHX_
124	int dowrite, int fd, off_t offset, size_t length,
125	SV data, STRLEN dataoffset, SV callback)
126	{
127	aio_req req;
128	STRLEN svlen;
129	char *svptr = SvPV (data, svlen);
130
131	SvUPGRADE (data, SVt_PV);
132	SvPOK_on (data);
133
134	if (dataoffset < 0)
135	dataoffset += svlen;
136
137	if (dataoffset < 0 \|\| dataoffset > svlen)
138	croak ("data offset outside of string");
139
140	if (dowrite)
141	{	129	}
142	/* write: check length and adjust. */
143	if (length < 0 \|\| length + dataoffset > svlen)
144	length = svlen - dataoffset;
145	}
146	else
147	{
148	/* read: grow scalar as necessary */
149	svptr = SvGROW (data, length + dataoffset);
150	}
151		130
152	if (length < 0)	131	if (req->data)
153	croak ("length must not be negative");	132	SvREFCNT_dec (req->data);
154		133
155	Newz (0, req, 1, aio_cb);
156
157	if (!req)	134	if (req->fh)
158	croak ("out of memory during aio_req allocation");	135	SvREFCNT_dec (req->fh);
159		136
160	req->type = dowrite ? REQ_WRITE : REQ_READ;	137	if (req->fh2)
161	req->fd = fd;	138	SvREFCNT_dec (req->fh2);
162	req->offset = offset;
163	req->length = length;
164	req->data = SvREFCNT_inc (data);
165	req->dataptr = (char *)svptr + dataoffset;
166	req->callback = SvREFCNT_inc (callback);
167		139
168	send_req (req);	140	if (req->statdata)
		141	Safefree (req->statdata);
		142
		143	if (req->callback)
		144	SvREFCNT_dec (req->callback);
		145
		146	if (req->type == REQ_READDIR && req->result >= 0)
		147	free (req->data2ptr);
		148
		149	Safefree (req);
169	}	150	}
170		151
171	static void	152	static void
172	poll_wait ()	153	poll_wait ()
173	{	154	{
174	if (!nreqs)	155	if (nreqs && !ress)
175	return;	156	{
176
177	fd_set rfd;	157	fd_set rfd;
178	FD_ZERO(&rfd);	158	FD_ZERO(&rfd);
179	FD_SET(respipe [0], &rfd);	159	FD_SET(respipe [0], &rfd);
180		160
181	select (respipe [0] + 1, &rfd, 0, 0, 0);	161	select (respipe [0] + 1, &rfd, 0, 0, 0);
		162	}
182	}	163	}
183		164
184	static int	165	static int
185	poll_cb (pTHX)	166	poll_cb ()
186	{	167	{
187	dSP;	168	dSP;
188	int count = 0;	169	int count = 0;
		170	int do_croak = 0;
189	aio_req req;	171	aio_req req;
190
191	{
192	/* read and signals sent by the worker threads */
193	char buf [32];
194	while (read (respipe [0], buf, 32) > 0)
195	;
196	}
197		172
198	for (;;)	173	for (;;)
199	{	174	{
200	pthread_mutex_lock (&reslock);	175	pthread_mutex_lock (&reslock);
201
202	req = ress;	176	req = ress;
203		177
204	if (ress)	178	if (req)
205	{	179	{
206	ress = ress->next;	180	ress = req->next;
		181
207	if (!ress) rese = 0;	182	if (!ress)
		183	{
		184	/* read any signals sent by the worker threads */
		185	char buf [32];
		186	while (read (respipe [0], buf, 32) == 32)
		187	;
		188
		189	rese = 0;
		190	}
208	}	191	}
209		192
210	pthread_mutex_unlock (&reslock);	193	pthread_mutex_unlock (&reslock);
211		194
212	if (!req)	195	if (!req)
220	{	203	{
221	int errorno = errno;	204	int errorno = errno;
222	errno = req->errorno;	205	errno = req->errorno;
223		206
224	if (req->type == REQ_READ)	207	if (req->type == REQ_READ)
225	SvCUR_set (req->data, req->dataoffset	208	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
226	+ req->result > 0 ? req->result : 0);
227		209
		210	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
		211	SvREADONLY_off (req->data);
		212
228	if (req->data)	213	if (req->statdata)
229	SvREFCNT_dec (req->data);
230
231	if (req->type == REQ_STAT \|\| req->type == REQ_LSTAT \|\| req->type == REQ_FSTAT)
232	{	214	{
233	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	215	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
234	PL_laststatval = req->result;	216	PL_laststatval = req->result;
235	PL_statcache = *(req->statdata);	217	PL_statcache = *(req->statdata);
236
237	Safefree (req->statdata);
238	}	218	}
239		219
		220	ENTER;
240	PUSHMARK (SP);	221	PUSHMARK (SP);
241	XPUSHs (sv_2mortal (newSViv (req->result)));
242		222
243	if (req->type == REQ_OPEN)	223	if (req->type == REQ_READDIR)
244	{	224	{
		225	SV *rv = &PL_sv_undef;
		226
		227	if (req->result >= 0)
		228	{
		229	char *buf = req->data2ptr;
		230	AV *av = newAV ();
		231
		232	while (req->result)
		233	{
		234	SV *sv = newSVpv (buf, 0);
		235
		236	av_push (av, sv);
		237	buf += SvCUR (sv) + 1;
		238	req->result--;
		239	}
		240
		241	rv = sv_2mortal (newRV_noinc ((SV *)av));
		242	}
		243
		244	XPUSHs (rv);
		245	}
		246	else
		247	{
		248	XPUSHs (sv_2mortal (newSViv (req->result)));
		249
		250	if (req->type == REQ_OPEN)
		251	{
245	/* convert fd to fh */	252	/* convert fd to fh */
246	SV *fh;	253	SV *fh;
247		254
		255	PUTBACK;
		256	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		257	SPAGAIN;
		258
		259	fh = SvREFCNT_inc (POPs);
		260
		261	PUSHMARK (SP);
		262	XPUSHs (sv_2mortal (fh));
		263	}
		264	}
		265
		266	if (SvOK (req->callback) && !req->cancelled)
		267	{
248	PUTBACK;	268	PUTBACK;
249	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);	269	call_sv (req->callback, G_VOID \| G_EVAL);
250	SPAGAIN;	270	SPAGAIN;
251		271
252	fh = POPs;	272	if (SvTRUE (ERRSV))
253		273	{
254	PUSHMARK (SP);	274	req_free (req);
255	XPUSHs (fh);	275	croak (0);
		276	}
256	}	277	}
257		278
258	PUTBACK;
259	call_sv (req->callback, G_VOID \| G_EVAL);
260	SPAGAIN;
261		279	LEAVE;
262	if (req->callback)
263	SvREFCNT_dec (req->callback);
264		280
265	errno = errorno;	281	errno = errorno;
266	count++;	282	count++;
267	}	283	}
268		284
269	Safefree (req);	285	req_free (req);
270	}	286	}
271		287
272	return count;	288	return count;
273	}	289	}
		290
		291	static void aio_proc(void arg);
		292
		293	static void
		294	start_thread (void)
		295	{
		296	sigset_t fullsigset, oldsigset;
		297	pthread_t tid;
		298	pthread_attr_t attr;
		299
		300	pthread_attr_init (&attr);
		301	pthread_attr_setstacksize (&attr, STACKSIZE);
		302	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		303
		304	sigfillset (&fullsigset);
		305	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
		306
		307	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
		308	started++;
		309
		310	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		311	}
		312
		313	static void
		314	req_send (aio_req req)
		315	{
		316	while (started < wanted && nreqs >= started)
		317	start_thread ();
		318
		319	nreqs++;
		320
		321	pthread_mutex_lock (&reqlock);
		322
		323	req->next = 0;
		324
		325	if (reqe)
		326	{
		327	reqe->next = req;
		328	reqe = req;
		329	}
		330	else
		331	reqe = reqs = req;
		332
		333	pthread_cond_signal (&reqwait);
		334	pthread_mutex_unlock (&reqlock);
		335
		336	if (nreqs > max_outstanding)
		337	for (;;)
		338	{
		339	poll_cb ();
		340
		341	if (nreqs <= max_outstanding)
		342	break;
		343
		344	poll_wait ();
		345	}
		346	}
		347
		348	static void
		349	end_thread (void)
		350	{
		351	aio_req req;
		352	Newz (0, req, 1, aio_cb);
		353	req->type = REQ_QUIT;
		354
		355	req_send (req);
		356	}
		357
		358	static void min_parallel (int nthreads)
		359	{
		360	if (wanted < nthreads)
		361	wanted = nthreads;
		362	}
		363
		364	static void max_parallel (int nthreads)
		365	{
		366	int cur = started;
		367
		368	if (wanted > nthreads)
		369	wanted = nthreads;
		370
		371	while (cur > wanted)
		372	{
		373	end_thread ();
		374	cur--;
		375	}
		376
		377	while (started > wanted)
		378	{
		379	poll_wait ();
		380	poll_cb ();
		381	}
		382	}
		383
		384	static void create_pipe ()
		385	{
		386	if (pipe (respipe))
		387	croak ("unable to initialize result pipe");
		388
		389	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
		390	croak ("cannot set result pipe to nonblocking mode");
		391
		392	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		393	croak ("cannot set result pipe to nonblocking mode");
		394	}
		395
		396	/*****************************************************************************/
		397	/* work around various missing functions */
		398
		399	#if !HAVE_PREADWRITE
		400	# define pread aio_pread
		401	# define pwrite aio_pwrite
		402
		403	/*
		404	* make our pread/pwrite safe against themselves, but not against
		405	* normal read/write by using a mutex. slows down execution a lot,
		406	* but that's your problem, not mine.
		407	*/
		408	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
		409
		410	static ssize_t
		411	pread (int fd, void *buf, size_t count, off_t offset)
		412	{
		413	ssize_t res;
		414	off_t ooffset;
		415
		416	pthread_mutex_lock (&preadwritelock);
		417	ooffset = lseek (fd, 0, SEEK_CUR);
		418	lseek (fd, offset, SEEK_SET);
		419	res = read (fd, buf, count);
		420	lseek (fd, ooffset, SEEK_SET);
		421	pthread_mutex_unlock (&preadwritelock);
		422
		423	return res;
		424	}
		425
		426	static ssize_t
		427	pwrite (int fd, void *buf, size_t count, off_t offset)
		428	{
		429	ssize_t res;
		430	off_t ooffset;
		431
		432	pthread_mutex_lock (&preadwritelock);
		433	ooffset = lseek (fd, 0, SEEK_CUR);
		434	lseek (fd, offset, SEEK_SET);
		435	res = write (fd, buf, count);
		436	lseek (fd, offset, SEEK_SET);
		437	pthread_mutex_unlock (&preadwritelock);
		438
		439	return res;
		440	}
		441	#endif
		442
		443	#if !HAVE_FDATASYNC
		444	# define fdatasync fsync
		445	#endif
		446
		447	#if !HAVE_READAHEAD
		448	# define readahead aio_readahead
		449
		450	static ssize_t
		451	readahead (int fd, off_t offset, size_t count)
		452	{
		453	char readahead_buf[4096];
		454
		455	while (count > 0)
		456	{
		457	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
		458
		459	pread (fd, readahead_buf, len, offset);
		460	offset += len;
		461	count -= len;
		462	}
		463
		464	errno = 0;
		465	}
		466	#endif
		467
		468	#if !HAVE_READDIR_R
		469	# define readdir_r aio_readdir_r
		470
		471	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		472
		473	static int
		474	readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
		475	{
		476	struct dirent *e;
		477	int errorno;
		478
		479	pthread_mutex_lock (&readdirlock);
		480
		481	e = readdir (dirp);
		482	errorno = errno;
		483
		484	if (e)
		485	{
		486	*res = ent;
		487	strcpy (ent->d_name, e->d_name);
		488	}
		489	else
		490	*res = 0;
		491
		492	pthread_mutex_unlock (&readdirlock);
		493
		494	errno = errorno;
		495	return e ? 0 : -1;
		496	}
		497	#endif
		498
		499	/* sendfile always needs emulation */
		500	static ssize_t
		501	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
		502	{
		503	ssize_t res;
		504
		505	if (!count)
		506	return 0;
		507
		508	#if HAVE_SENDFILE
		509	# if __linux
		510	res = sendfile (ofd, ifd, &offset, count);
		511
		512	# elif __freebsd
		513	/*
		514	* Of course, the freebsd sendfile is a dire hack with no thoughts
		515	* wasted on making it similar to other I/O functions.
		516	*/
		517	{
		518	off_t sbytes;
		519	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		520
		521	if (res < 0 && sbytes)
		522	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
		523	res = sbytes;
		524	}
		525
		526	# elif __hpux
		527	res = sendfile (ofd, ifd, offset, count, 0, 0);
		528
		529	# elif __solaris
		530	{
		531	struct sendfilevec vec;
		532	size_t sbytes;
		533
		534	vec.sfv_fd = ifd;
		535	vec.sfv_flag = 0;
		536	vec.sfv_off = offset;
		537	vec.sfv_len = count;
		538
		539	res = sendfilev (ofd, &vec, 1, &sbytes);
		540
		541	if (res < 0 && sbytes)
		542	res = sbytes;
		543	}
		544
		545	# endif
		546	#else
		547	res = -1;
		548	errno = ENOSYS;
		549	#endif
		550
		551	if (res < 0
		552	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK
		553	#if __solaris
		554	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE
		555	#endif
		556	)
		557	)
		558	{
		559	/* emulate sendfile. this is a major pain in the ass */
		560	char buf[4096];
		561	res = 0;
		562
		563	while (count)
		564	{
		565	ssize_t cnt;
		566
		567	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
		568
		569	if (cnt <= 0)
		570	{
		571	if (cnt && !res) res = -1;
		572	break;
		573	}
		574
		575	cnt = write (ofd, buf, cnt);
		576
		577	if (cnt <= 0)
		578	{
		579	if (cnt && !res) res = -1;
		580	break;
		581	}
		582
		583	offset += cnt;
		584	res += cnt;
		585	count -= cnt;
		586	}
		587	}
		588
		589	return res;
		590	}
		591
		592	/* read a full directory */
		593	static int
		594	scandir_ (const char path, void *namesp)
		595	{
		596	DIR *dirp = opendir (path);
		597	union
		598	{
		599	struct dirent d;
		600	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		601	} u;
		602	struct dirent *entp;
		603	char name, names;
		604	int memlen = 4096;
		605	int memofs = 0;
		606	int res = 0;
		607	int errorno;
		608
		609	if (!dirp)
		610	return -1;
		611
		612	names = malloc (memlen);
		613
		614	for (;;)
		615	{
		616	errno = 0, readdir_r (dirp, &u.d, &entp);
		617
		618	if (!entp)
		619	break;
		620
		621	name = entp->d_name;
		622
		623	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
		624	{
		625	int len = strlen (name) + 1;
		626
		627	res++;
		628
		629	while (memofs + len > memlen)
		630	{
		631	memlen *= 2;
		632	names = realloc (names, memlen);
		633	if (!names)
		634	break;
		635	}
		636
		637	memcpy (names + memofs, name, len);
		638	memofs += len;
		639	}
		640	}
		641
		642	errorno = errno;
		643	closedir (dirp);
		644
		645	if (errorno)
		646	{
		647	free (names);
		648	errno = errorno;
		649	res = -1;
		650	}
		651
		652	namesp = (void )names;
		653	return res;
		654	}
		655
		656	/*****************************************************************************/
274		657
275	static void *	658	static void *
276	aio_proc (void *thr_arg)	659	aio_proc (void *thr_arg)
277	{	660	{
278	aio_req req;	661	aio_req req;
…		…
300		683
301	pthread_mutex_unlock (&reqlock);	684	pthread_mutex_unlock (&reqlock);
302		685
303	errno = 0; /* strictly unnecessary */	686	errno = 0; /* strictly unnecessary */
304		687
305	type = req->type;	688	if (!req->cancelled)
306
307	switch (type)	689	switch (req->type)
308	{	690	{
309	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;	691	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
310	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;	692	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
311	#if SYS_readahead	693
312	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	694	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
313	#else	695	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
314	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
315	#endif
316		696
317	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	697	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
318	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	698	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
319	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	699	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
320		700
321	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	701	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
322	case REQ_CLOSE: req->result = close (req->fd); break;	702	case REQ_CLOSE: req->result = close (req->fd); break;
323	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	703	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
324
325	case REQ_FSYNC: req->result = fsync (req->fd); break;	704	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		705	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		706	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
		707	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		708
326	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	709	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
		710	case REQ_FSYNC: req->result = fsync (req->fd); break;
		711	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
327		712
328	case REQ_QUIT:	713	case REQ_QUIT:
329	break;	714	break;
330		715
331	default:	716	default:
332	req->result = ENOSYS;	717	req->result = ENOSYS;
333	break;	718	break;
334	}	719	}
335		720
336	req->errorno = errno;	721	req->errorno = errno;
337		722
338	pthread_mutex_lock (&reslock);	723	pthread_mutex_lock (&reslock);
339		724
…		…
357	while (type != REQ_QUIT);	742	while (type != REQ_QUIT);
358		743
359	return 0;	744	return 0;
360	}	745	}
361		746
		747	/*****************************************************************************/
		748
		749	static void atfork_prepare (void)
		750	{
		751	pthread_mutex_lock (&reqlock);
		752	pthread_mutex_lock (&reslock);
		753	#if !HAVE_PREADWRITE
		754	pthread_mutex_lock (&preadwritelock);
		755	#endif
		756	#if !HAVE_READDIR_R
		757	pthread_mutex_lock (&readdirlock);
		758	#endif
		759	}
		760
		761	static void atfork_parent (void)
		762	{
		763	#if !HAVE_READDIR_R
		764	pthread_mutex_unlock (&readdirlock);
		765	#endif
		766	#if !HAVE_PREADWRITE
		767	pthread_mutex_unlock (&preadwritelock);
		768	#endif
		769	pthread_mutex_unlock (&reslock);
		770	pthread_mutex_unlock (&reqlock);
		771	}
		772
		773	static void atfork_child (void)
		774	{
		775	aio_req prv;
		776
		777	started = 0;
		778
		779	while (reqs)
		780	{
		781	prv = reqs;
		782	reqs = prv->next;
		783	req_free (prv);
		784	}
		785
		786	reqs = reqe = 0;
		787
		788	while (ress)
		789	{
		790	prv = ress;
		791	ress = prv->next;
		792	req_free (prv);
		793	}
		794
		795	ress = rese = 0;
		796
		797	close (respipe [0]);
		798	close (respipe [1]);
		799	create_pipe ();
		800
		801	atfork_parent ();
		802	}
		803
		804	#define dREQ \
		805	aio_req req; \
		806	\
		807	if (SvOK (callback) && !SvROK (callback)) \
		808	croak ("callback must be undef or of reference type"); \
		809	\
		810	Newz (0, req, 1, aio_cb); \
		811	if (!req) \
		812	croak ("out of memory during aio_req allocation"); \
		813	\
		814	req->callback = newSVsv (callback)
		815
		816	#define REQ_SEND \
		817	req_send (req); \
		818	\
		819	if (GIMME_V != G_VOID) \
		820	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		821
362	MODULE = IO::AIO PACKAGE = IO::AIO	822	MODULE = IO::AIO PACKAGE = IO::AIO
363		823
		824	PROTOTYPES: ENABLE
		825
364	BOOT:	826	BOOT:
365	{	827	{
366	if (pipe (respipe))	828	HV *stash = gv_stashpv ("IO::AIO", 1);
367	croak ("unable to initialize result pipe");	829	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		830	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		831	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
368		832
369	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	833	create_pipe ();
370	croak ("cannot set result pipe to nonblocking mode");	834	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
371
372	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
373	croak ("cannot set result pipe to nonblocking mode");
374	}	835	}
375		836
376	void	837	void
377	min_parallel(nthreads)	838	min_parallel (nthreads)
378	int nthreads	839	int nthreads
379	PROTOTYPE: $	840	PROTOTYPE: $
380	CODE:
381	while (nthreads > started)
382	start_thread ();
383		841
384	void	842	void
385	max_parallel(nthreads)	843	max_parallel (nthreads)
386	int nthreads	844	int nthreads
387	PROTOTYPE: $	845	PROTOTYPE: $
		846
		847	int
		848	max_outstanding (nreqs)
		849	int nreqs
		850	PROTOTYPE: $
388	CODE:	851	CODE:
389	{	852	RETVAL = max_outstanding;
390	int cur = started;	853	max_outstanding = nreqs;
391	while (cur > nthreads)
392	{
393	end_thread ();
394	cur--;
395	}
396		854
397	while (started > nthreads)
398	{
399	poll_wait ();
400	poll_cb (aTHX);
401	}
402	}
403
404	void	855	void
405	aio_open(pathname,flags,mode,callback)	856	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
406	SV * pathname	857	SV * pathname
407	int flags	858	int flags
408	int mode	859	int mode
409	SV * callback	860	SV * callback
410	PROTOTYPE: $$$$	861	PROTOTYPE: $$$;$
411	CODE:	862	PPCODE:
412	{	863	{
413	aio_req req;	864	dREQ;
414
415	Newz (0, req, 1, aio_cb);
416
417	if (!req)
418	croak ("out of memory during aio_req allocation");
419		865
420	req->type = REQ_OPEN;	866	req->type = REQ_OPEN;
421	req->data = newSVsv (pathname);	867	req->data = newSVsv (pathname);
422	req->dataptr = SvPV_nolen (req->data);	868	req->dataptr = SvPVbyte_nolen (req->data);
423	req->fd = flags;	869	req->fd = flags;
424	req->mode = mode;	870	req->mode = mode;
425	req->callback = SvREFCNT_inc (callback);
426		871
427	send_req (req);	872	REQ_SEND;
428	}	873	}
429		874
430	void	875	void
431	aio_close(fh,callback)	876	aio_close (fh,callback=&PL_sv_undef)
432	InputStream fh	877	SV * fh
433	SV * callback	878	SV * callback
434	PROTOTYPE: $$	879	PROTOTYPE: $;$
435	ALIAS:	880	ALIAS:
436	aio_close = REQ_CLOSE	881	aio_close = REQ_CLOSE
437	aio_fsync = REQ_FSYNC	882	aio_fsync = REQ_FSYNC
438	aio_fdatasync = REQ_FDATASYNC	883	aio_fdatasync = REQ_FDATASYNC
439	CODE:	884	PPCODE:
		885	{
		886	dREQ;
		887
		888	req->type = ix;
		889	req->fh = newSVsv (fh);
		890	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
		891
		892	REQ_SEND (req);
		893	}
		894
		895	void
		896	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
		897	SV * fh
		898	UV offset
		899	UV length
		900	SV * data
		901	UV dataoffset
		902	SV * callback
		903	ALIAS:
		904	aio_read = REQ_READ
		905	aio_write = REQ_WRITE
		906	PROTOTYPE: $$$$$;$
		907	PPCODE:
440	{	908	{
441	aio_req req;	909	aio_req req;
		910	STRLEN svlen;
		911	char *svptr = SvPVbyte (data, svlen);
442		912
443	Newz (0, req, 1, aio_cb);	913	SvUPGRADE (data, SVt_PV);
		914	SvPOK_on (data);
444		915
445	if (!req)	916	if (dataoffset < 0)
446	croak ("out of memory during aio_req allocation");	917	dataoffset += svlen;
447		918
448	req->type = ix;	919	if (dataoffset < 0 \|\| dataoffset > svlen)
449	req->fd = PerlIO_fileno (fh);	920	croak ("data offset outside of string");
450	req->callback = SvREFCNT_inc (callback);
451		921
452	send_req (req);	922	if (ix == REQ_WRITE)
453	}	923	{
454		924	/* write: check length and adjust. */
455	void	925	if (length < 0 \|\| length + dataoffset > svlen)
456	aio_read(fh,offset,length,data,dataoffset,callback)	926	length = svlen - dataoffset;
457	InputStream fh	927	}
458	UV offset	928	else
459	IV length	929	{
460	SV * data	930	/* read: grow scalar as necessary */
461	IV dataoffset	931	svptr = SvGROW (data, length + dataoffset);
462	SV * callback	932	}
463	PROTOTYPE: $$$$$$
464	CODE:
465	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
466
467	void
468	aio_write(fh,offset,length,data,dataoffset,callback)
469	OutputStream fh
470	UV offset
471	IV length
472	SV * data
473	IV dataoffset
474	SV * callback
475	PROTOTYPE: $$$$$$
476	CODE:
477	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
478
479	void
480	aio_readahead(fh,offset,length,callback)
481	InputStream fh
482	UV offset
483	IV length
484	SV * callback
485	PROTOTYPE: $$$$
486	CODE:
487	{
488	aio_req req;
489		933
490	if (length < 0)	934	if (length < 0)
491	croak ("length must not be negative");	935	croak ("length must not be negative");
492		936
493	Newz (0, req, 1, aio_cb);	937	{
		938	dREQ;
494		939
495	if (!req)	940	req->type = ix;
496	croak ("out of memory during aio_req allocation");	941	req->fh = newSVsv (fh);
		942	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
		943	: IoOFP (sv_2io (fh)));
		944	req->offset = offset;
		945	req->length = length;
		946	req->data = SvREFCNT_inc (data);
		947	req->dataptr = (char *)svptr + dataoffset;
		948
		949	if (!SvREADONLY (data))
		950	{
		951	SvREADONLY_on (data);
		952	req->data2ptr = (void *)data;
		953	}
		954
		955	REQ_SEND;
		956	}
		957	}
		958
		959	void
		960	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		961	SV * out_fh
		962	SV * in_fh
		963	UV in_offset
		964	UV length
		965	SV * callback
		966	PROTOTYPE: $$$$;$
		967	PPCODE:
		968	{
		969	dREQ;
		970
		971	req->type = REQ_SENDFILE;
		972	req->fh = newSVsv (out_fh);
		973	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		974	req->fh2 = newSVsv (in_fh);
		975	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		976	req->offset = in_offset;
		977	req->length = length;
		978
		979	REQ_SEND;
		980	}
		981
		982	void
		983	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
		984	SV * fh
		985	UV offset
		986	IV length
		987	SV * callback
		988	PROTOTYPE: $$$;$
		989	PPCODE:
		990	{
		991	dREQ;
497		992
498	req->type = REQ_READAHEAD;	993	req->type = REQ_READAHEAD;
		994	req->fh = newSVsv (fh);
499	req->fd = PerlIO_fileno (fh);	995	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
500	req->offset = offset;	996	req->offset = offset;
501	req->length = length;	997	req->length = length;
502	req->callback = SvREFCNT_inc (callback);
503		998
504	send_req (req);	999	REQ_SEND;
505	}	1000	}
506		1001
507	void	1002	void
508	aio_stat(fh_or_path,callback)	1003	aio_stat (fh_or_path,callback=&PL_sv_undef)
509	SV * fh_or_path	1004	SV * fh_or_path
510	SV * callback	1005	SV * callback
511	PROTOTYPE: $$
512	ALIAS:	1006	ALIAS:
		1007	aio_stat = REQ_STAT
513	aio_lstat = 1	1008	aio_lstat = REQ_LSTAT
514	CODE:	1009	PPCODE:
515	{	1010	{
516	aio_req req;	1011	dREQ;
517
518	Newz (0, req, 1, aio_cb);
519
520	if (!req)
521	croak ("out of memory during aio_req allocation");
522		1012
523	New (0, req->statdata, 1, Stat_t);	1013	New (0, req->statdata, 1, Stat_t);
524
525	if (!req->statdata)	1014	if (!req->statdata)
		1015	{
		1016	req_free (req);
526	croak ("out of memory during aio_req->statdata allocation");	1017	croak ("out of memory during aio_req->statdata allocation");
		1018	}
527		1019
528	if (SvPOK (fh_or_path))	1020	if (SvPOK (fh_or_path))
529	{	1021	{
530	req->type = ix ? REQ_LSTAT : REQ_STAT;	1022	req->type = ix;
531	req->data = newSVsv (fh_or_path);	1023	req->data = newSVsv (fh_or_path);
532	req->dataptr = SvPV_nolen (req->data);	1024	req->dataptr = SvPVbyte_nolen (req->data);
533	}	1025	}
534	else	1026	else
535	{	1027	{
536	req->type = REQ_FSTAT;	1028	req->type = REQ_FSTAT;
		1029	req->fh = newSVsv (fh_or_path);
537	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1030	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
538	}	1031	}
539		1032
540	req->callback = SvREFCNT_inc (callback);	1033	REQ_SEND;
541
542	send_req (req);
543	}	1034	}
544		1035
545	void	1036	void
546	aio_unlink(pathname,callback)	1037	aio_unlink (pathname,callback=&PL_sv_undef)
547	SV * pathname	1038	SV * pathname
548	SV * callback	1039	SV * callback
		1040	ALIAS:
		1041	aio_unlink = REQ_UNLINK
		1042	aio_rmdir = REQ_RMDIR
		1043	aio_readdir = REQ_READDIR
		1044	PPCODE:
		1045	{
		1046	dREQ;
		1047
		1048	req->type = ix;
		1049	req->data = newSVsv (pathname);
		1050	req->dataptr = SvPVbyte_nolen (req->data);
		1051
		1052	REQ_SEND;
		1053	}
		1054
		1055	void
		1056	aio_link (oldpath,newpath,callback=&PL_sv_undef)
		1057	SV * oldpath
		1058	SV * newpath
		1059	SV * callback
		1060	ALIAS:
		1061	aio_link = REQ_LINK
		1062	aio_symlink = REQ_SYMLINK
		1063	aio_rename = REQ_RENAME
		1064	PPCODE:
		1065	{
		1066	dREQ;
		1067
		1068	req->type = ix;
		1069	req->fh = newSVsv (oldpath);
		1070	req->data2ptr = SvPVbyte_nolen (req->fh);
		1071	req->data = newSVsv (newpath);
		1072	req->dataptr = SvPVbyte_nolen (req->data);
		1073
		1074	REQ_SEND;
		1075	}
		1076
		1077	void
		1078	aio_group (callback=&PL_sv_undef)
		1079	SV * callback
		1080	PROTOTYPE: ;&
		1081	PPCODE:
		1082	{
		1083	dREQ;
		1084	req->type = REQ_GROUP;
		1085	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1086	}
		1087
		1088	void
		1089	flush ()
549	PROTOTYPE: $$	1090	PROTOTYPE:
550	CODE:	1091	CODE:
551	{	1092	while (nreqs)
552	aio_req req;	1093	{
553		1094	poll_wait ();
554	Newz (0, req, 1, aio_cb);	1095	poll_cb ();
555		1096	}
556	if (!req)	1097
557	croak ("out of memory during aio_req allocation");	1098	void
558		1099	poll()
559	req->type = REQ_UNLINK;	1100	PROTOTYPE:
560	req->data = newSVsv (pathname);	1101	CODE:
561	req->dataptr = SvPV_nolen (req->data);	1102	if (nreqs)
562	req->callback = SvREFCNT_inc (callback);	1103	{
563		1104	poll_wait ();
564	send_req (req);	1105	poll_cb ();
565	}	1106	}
566		1107
567	int	1108	int
568	poll_fileno()	1109	poll_fileno()
569	PROTOTYPE:	1110	PROTOTYPE:
570	CODE:	1111	CODE:
…		…
574		1115
575	int	1116	int
576	poll_cb(...)	1117	poll_cb(...)
577	PROTOTYPE:	1118	PROTOTYPE:
578	CODE:	1119	CODE:
579	RETVAL = poll_cb (aTHX);	1120	RETVAL = poll_cb ();
580	OUTPUT:	1121	OUTPUT:
581	RETVAL	1122	RETVAL
582		1123
583	void	1124	void
584	poll_wait()	1125	poll_wait()
…		…
593	CODE:	1134	CODE:
594	RETVAL = nreqs;	1135	RETVAL = nreqs;
595	OUTPUT:	1136	OUTPUT:
596	RETVAL	1137	RETVAL
597		1138
		1139	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1140
		1141	void
		1142	cancel (aio_req_ornot req)
		1143	PROTOTYPE:
		1144	CODE:
		1145	req->cancelled = 1;
		1146

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.3 by root, Sun Jul 10 20:07:11 2005 UTC vs. Revision 1.44 by root, Sat Oct 21 23:20:29 2006 UTC

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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.3 by root, Sun Jul 10 20:07:11 2005 UTC vs.
Revision 1.44 by root, Sat Oct 21 23:20:29 2006 UTC