[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 1.42 by root, Fri Jul 21 07:35:31 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,
36	};	58	};
37		59
38	typedef struct aio_cb {	60	typedef struct aio_cb {
39	struct aio_cb *volatile next;	61	struct aio_cb *volatile next;
40		62
41	int type;	63	int type;
42		64
		65	/* should receive a cleanup, with unions */
43	int fd;	66	int fd, fd2;
44	off_t offset;	67	off_t offset;
45	size_t length;	68	size_t length;
46	ssize_t result;	69	ssize_t result;
47	mode_t mode; /* open */	70	mode_t mode; /* open */
48	int errorno;	71	int errorno;
49	SV data, callback;	72	SV data, callback;
50	void *dataptr;	73	SV fh, fh2;
		74	void dataptr, data2ptr;
51	STRLEN dataoffset;	75	STRLEN dataoffset;
52		76
53	Stat_t *statdata;	77	Stat_t *statdata;
54	} aio_cb;	78	} aio_cb;
55		79
56	typedef aio_cb *aio_req;	80	typedef aio_cb *aio_req;
57		81
58	static int started;	82	static int started, wanted;
59	static int nreqs;	83	static volatile int nreqs;
		84	static int max_outstanding = 1<<30;
60	static int respipe [2];	85	static int respipe [2];
61		86
62	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	87	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
63	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	88	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
64	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	89	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
65		90
66	static volatile aio_req reqs, reqe; /* queue start, queue end */	91	static volatile aio_req reqs, reqe; /* queue start, queue end */
67	static volatile aio_req ress, rese; /* queue start, queue end */	92	static volatile aio_req ress, rese; /* queue start, queue end */
68		93
69	static void aio_proc(void arg);	94	static void free_req (aio_req req)
70
71	static void
72	start_thread (void)
73	{	95	{
74	sigset_t fullsigset, oldsigset;	96	if (req->data)
75	pthread_t tid;	97	SvREFCNT_dec (req->data);
76	pthread_attr_t attr;
77		98
78	pthread_attr_init (&attr);
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	}
90
91	static void
92	send_req (aio_req req)
93	{
94	nreqs++;
95
96	pthread_mutex_lock (&reqlock);
97
98	req->next = 0;
99
100	if (reqe)	99	if (req->fh)
101	{	100	SvREFCNT_dec (req->fh);
102	reqe->next = req;
103	reqe = req;
104	}
105	else
106	reqe = reqs = req;
107		101
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	{
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
152	if (length < 0)
153	croak ("length must not be negative");
154
155	Newz (0, req, 1, aio_cb);
156
157	if (!req)	102	if (req->fh2)
158	croak ("out of memory during aio_req allocation");	103	SvREFCNT_dec (req->fh2);
159		104
160	req->type = dowrite ? REQ_WRITE : REQ_READ;	105	if (req->statdata)
161	req->fd = fd;	106	Safefree (req->statdata);
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		107
168	send_req (req);	108	if (req->callback)
		109	SvREFCNT_dec (req->callback);
		110
		111	if (req->type == REQ_READDIR && req->result >= 0)
		112	free (req->data2ptr);
		113
		114	Safefree (req);
169	}	115	}
170		116
171	static void	117	static void
172	poll_wait ()	118	poll_wait ()
173	{	119	{
174	if (!nreqs)	120	if (nreqs && !ress)
175	return;	121	{
176
177	fd_set rfd;	122	fd_set rfd;
178	FD_ZERO(&rfd);	123	FD_ZERO(&rfd);
179	FD_SET(respipe [0], &rfd);	124	FD_SET(respipe [0], &rfd);
180		125
181	select (respipe [0] + 1, &rfd, 0, 0, 0);	126	select (respipe [0] + 1, &rfd, 0, 0, 0);
		127	}
182	}	128	}
183		129
184	static int	130	static int
185	poll_cb (pTHX)	131	poll_cb ()
186	{	132	{
187	dSP;	133	dSP;
188	int count = 0;	134	int count = 0;
		135	int do_croak = 0;
189	aio_req req;	136	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		137
198	for (;;)	138	for (;;)
199	{	139	{
200	pthread_mutex_lock (&reslock);	140	pthread_mutex_lock (&reslock);
201
202	req = ress;	141	req = ress;
203		142
204	if (ress)	143	if (req)
205	{	144	{
206	ress = ress->next;	145	ress = req->next;
		146
207	if (!ress) rese = 0;	147	if (!ress)
		148	{
		149	/* read any signals sent by the worker threads */
		150	char buf [32];
		151	while (read (respipe [0], buf, 32) == 32)
		152	;
		153
		154	rese = 0;
		155	}
208	}	156	}
209		157
210	pthread_mutex_unlock (&reslock);	158	pthread_mutex_unlock (&reslock);
211		159
212	if (!req)	160	if (!req)
220	{	168	{
221	int errorno = errno;	169	int errorno = errno;
222	errno = req->errorno;	170	errno = req->errorno;
223		171
224	if (req->type == REQ_READ)	172	if (req->type == REQ_READ)
225	SvCUR_set (req->data, req->dataoffset	173	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
226	+ req->result > 0 ? req->result : 0);
227		174
		175	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
		176	SvREADONLY_off (req->data);
		177
228	if (req->data)	178	if (req->statdata)
229	SvREFCNT_dec (req->data);
230
231	if (req->type == REQ_STAT \|\| req->type == REQ_LSTAT \|\| req->type == REQ_FSTAT)
232	{	179	{
233	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	180	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
234	PL_laststatval = req->result;	181	PL_laststatval = req->result;
235	PL_statcache = *(req->statdata);	182	PL_statcache = *(req->statdata);
236
237	Safefree (req->statdata);
238	}	183	}
239		184
		185	ENTER;
240	PUSHMARK (SP);	186	PUSHMARK (SP);
241	XPUSHs (sv_2mortal (newSViv (req->result)));
242		187
243	if (req->type == REQ_OPEN)	188	if (req->type == REQ_READDIR)
244	{	189	{
		190	SV *rv = &PL_sv_undef;
		191
		192	if (req->result >= 0)
		193	{
		194	char *buf = req->data2ptr;
		195	AV *av = newAV ();
		196
		197	while (req->result)
		198	{
		199	SV *sv = newSVpv (buf, 0);
		200
		201	av_push (av, sv);
		202	buf += SvCUR (sv) + 1;
		203	req->result--;
		204	}
		205
		206	rv = sv_2mortal (newRV_noinc ((SV *)av));
		207	}
		208
		209	XPUSHs (rv);
		210	}
		211	else
		212	{
		213	XPUSHs (sv_2mortal (newSViv (req->result)));
		214
		215	if (req->type == REQ_OPEN)
		216	{
245	/* convert fd to fh */	217	/* convert fd to fh */
246	SV *fh;	218	SV *fh;
247		219
		220	PUTBACK;
		221	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		222	SPAGAIN;
		223
		224	fh = SvREFCNT_inc (POPs);
		225
		226	PUSHMARK (SP);
		227	XPUSHs (sv_2mortal (fh));
		228	}
		229	}
		230
		231	if (SvOK (req->callback))
		232	{
248	PUTBACK;	233	PUTBACK;
249	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);	234	call_sv (req->callback, G_VOID \| G_EVAL);
250	SPAGAIN;	235	SPAGAIN;
251		236
252	fh = POPs;	237	if (SvTRUE (ERRSV))
253		238	{
254	PUSHMARK (SP);	239	free_req (req);
255	XPUSHs (fh);	240	croak (0);
		241	}
256	}	242	}
257		243
258	PUTBACK;
259	call_sv (req->callback, G_VOID \| G_EVAL);
260	SPAGAIN;
261		244	LEAVE;
262	if (req->callback)
263	SvREFCNT_dec (req->callback);
264		245
265	errno = errorno;	246	errno = errorno;
266	count++;	247	count++;
267	}	248	}
268		249
269	Safefree (req);	250	free_req (req);
270	}	251	}
271		252
272	return count;	253	return count;
273	}	254	}
		255
		256	static void aio_proc(void arg);
		257
		258	static void
		259	start_thread (void)
		260	{
		261	sigset_t fullsigset, oldsigset;
		262	pthread_t tid;
		263	pthread_attr_t attr;
		264
		265	pthread_attr_init (&attr);
		266	pthread_attr_setstacksize (&attr, STACKSIZE);
		267	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		268
		269	sigfillset (&fullsigset);
		270	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
		271
		272	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
		273	started++;
		274
		275	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		276	}
		277
		278	static void
		279	send_req (aio_req req)
		280	{
		281	while (started < wanted && nreqs >= started)
		282	start_thread ();
		283
		284	nreqs++;
		285
		286	pthread_mutex_lock (&reqlock);
		287
		288	req->next = 0;
		289
		290	if (reqe)
		291	{
		292	reqe->next = req;
		293	reqe = req;
		294	}
		295	else
		296	reqe = reqs = req;
		297
		298	pthread_cond_signal (&reqwait);
		299	pthread_mutex_unlock (&reqlock);
		300
		301	if (nreqs > max_outstanding)
		302	for (;;)
		303	{
		304	poll_cb ();
		305
		306	if (nreqs <= max_outstanding)
		307	break;
		308
		309	poll_wait ();
		310	}
		311	}
		312
		313	static void
		314	end_thread (void)
		315	{
		316	aio_req req;
		317	Newz (0, req, 1, aio_cb);
		318	req->type = REQ_QUIT;
		319
		320	send_req (req);
		321	}
		322
		323	static void min_parallel (int nthreads)
		324	{
		325	if (wanted < nthreads)
		326	wanted = nthreads;
		327	}
		328
		329	static void max_parallel (int nthreads)
		330	{
		331	int cur = started;
		332
		333	if (wanted > nthreads)
		334	wanted = nthreads;
		335
		336	while (cur > wanted)
		337	{
		338	end_thread ();
		339	cur--;
		340	}
		341
		342	while (started > wanted)
		343	{
		344	poll_wait ();
		345	poll_cb ();
		346	}
		347	}
		348
		349	static void create_pipe ()
		350	{
		351	if (pipe (respipe))
		352	croak ("unable to initialize result pipe");
		353
		354	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
		355	croak ("cannot set result pipe to nonblocking mode");
		356
		357	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		358	croak ("cannot set result pipe to nonblocking mode");
		359	}
		360
		361	/*****************************************************************************/
		362	/* work around various missing functions */
		363
		364	#if !HAVE_PREADWRITE
		365	# define pread aio_pread
		366	# define pwrite aio_pwrite
		367
		368	/*
		369	* make our pread/pwrite safe against themselves, but not against
		370	* normal read/write by using a mutex. slows down execution a lot,
		371	* but that's your problem, not mine.
		372	*/
		373	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
		374
		375	static ssize_t
		376	pread (int fd, void *buf, size_t count, off_t offset)
		377	{
		378	ssize_t res;
		379	off_t ooffset;
		380
		381	pthread_mutex_lock (&preadwritelock);
		382	ooffset = lseek (fd, 0, SEEK_CUR);
		383	lseek (fd, offset, SEEK_SET);
		384	res = read (fd, buf, count);
		385	lseek (fd, ooffset, SEEK_SET);
		386	pthread_mutex_unlock (&preadwritelock);
		387
		388	return res;
		389	}
		390
		391	static ssize_t
		392	pwrite (int fd, void *buf, size_t count, off_t offset)
		393	{
		394	ssize_t res;
		395	off_t ooffset;
		396
		397	pthread_mutex_lock (&preadwritelock);
		398	ooffset = lseek (fd, 0, SEEK_CUR);
		399	lseek (fd, offset, SEEK_SET);
		400	res = write (fd, buf, count);
		401	lseek (fd, offset, SEEK_SET);
		402	pthread_mutex_unlock (&preadwritelock);
		403
		404	return res;
		405	}
		406	#endif
		407
		408	#if !HAVE_FDATASYNC
		409	# define fdatasync fsync
		410	#endif
		411
		412	#if !HAVE_READAHEAD
		413	# define readahead aio_readahead
		414
		415	static ssize_t
		416	readahead (int fd, off_t offset, size_t count)
		417	{
		418	char readahead_buf[4096];
		419
		420	while (count > 0)
		421	{
		422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
		423
		424	pread (fd, readahead_buf, len, offset);
		425	offset += len;
		426	count -= len;
		427	}
		428
		429	errno = 0;
		430	}
		431	#endif
		432
		433	#if !HAVE_READDIR_R
		434	# define readdir_r aio_readdir_r
		435
		436	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		437
		438	static int
		439	readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
		440	{
		441	struct dirent *e;
		442	int errorno;
		443
		444	pthread_mutex_lock (&readdirlock);
		445
		446	e = readdir (dirp);
		447	errorno = errno;
		448
		449	if (e)
		450	{
		451	*res = ent;
		452	strcpy (ent->d_name, e->d_name);
		453	}
		454	else
		455	*res = 0;
		456
		457	pthread_mutex_unlock (&readdirlock);
		458
		459	errno = errorno;
		460	return e ? 0 : -1;
		461	}
		462	#endif
		463
		464	/* sendfile always needs emulation */
		465	static ssize_t
		466	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
		467	{
		468	ssize_t res;
		469
		470	if (!count)
		471	return 0;
		472
		473	#if HAVE_SENDFILE
		474	# if __linux
		475	res = sendfile (ofd, ifd, &offset, count);
		476
		477	# elif __freebsd
		478	/*
		479	* Of course, the freebsd sendfile is a dire hack with no thoughts
		480	* wasted on making it similar to other I/O functions.
		481	*/
		482	{
		483	off_t sbytes;
		484	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		485
		486	if (res < 0 && sbytes)
		487	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
		488	res = sbytes;
		489	}
		490
		491	# elif __hpux
		492	res = sendfile (ofd, ifd, offset, count, 0, 0);
		493
		494	# elif __solaris
		495	{
		496	struct sendfilevec vec;
		497	size_t sbytes;
		498
		499	vec.sfv_fd = ifd;
		500	vec.sfv_flag = 0;
		501	vec.sfv_off = offset;
		502	vec.sfv_len = count;
		503
		504	res = sendfilev (ofd, &vec, 1, &sbytes);
		505
		506	if (res < 0 && sbytes)
		507	res = sbytes;
		508	}
		509
		510	# endif
		511	#else
		512	res = -1;
		513	errno = ENOSYS;
		514	#endif
		515
		516	if (res < 0
		517	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK
		518	#if __solaris
		519	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE
		520	#endif
		521	)
		522	)
		523	{
		524	/* emulate sendfile. this is a major pain in the ass */
		525	char buf[4096];
		526	res = 0;
		527
		528	while (count)
		529	{
		530	ssize_t cnt;
		531
		532	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
		533
		534	if (cnt <= 0)
		535	{
		536	if (cnt && !res) res = -1;
		537	break;
		538	}
		539
		540	cnt = write (ofd, buf, cnt);
		541
		542	if (cnt <= 0)
		543	{
		544	if (cnt && !res) res = -1;
		545	break;
		546	}
		547
		548	offset += cnt;
		549	res += cnt;
		550	count -= cnt;
		551	}
		552	}
		553
		554	return res;
		555	}
		556
		557	/* read a full directory */
		558	static int
		559	scandir_ (const char path, void *namesp)
		560	{
		561	DIR *dirp = opendir (path);
		562	union
		563	{
		564	struct dirent d;
		565	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		566	} u;
		567	struct dirent *entp;
		568	char name, names;
		569	int memlen = 4096;
		570	int memofs = 0;
		571	int res = 0;
		572	int errorno;
		573
		574	if (!dirp)
		575	return -1;
		576
		577	names = malloc (memlen);
		578
		579	for (;;)
		580	{
		581	errno = 0, readdir_r (dirp, &u.d, &entp);
		582
		583	if (!entp)
		584	break;
		585
		586	name = entp->d_name;
		587
		588	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
		589	{
		590	int len = strlen (name) + 1;
		591
		592	res++;
		593
		594	while (memofs + len > memlen)
		595	{
		596	memlen *= 2;
		597	names = realloc (names, memlen);
		598	if (!names)
		599	break;
		600	}
		601
		602	memcpy (names + memofs, name, len);
		603	memofs += len;
		604	}
		605	}
		606
		607	errorno = errno;
		608	closedir (dirp);
		609
		610	if (errorno)
		611	{
		612	free (names);
		613	errno = errorno;
		614	res = -1;
		615	}
		616
		617	namesp = (void )names;
		618	return res;
		619	}
		620
		621	/*****************************************************************************/
274		622
275	static void *	623	static void *
276	aio_proc (void *thr_arg)	624	aio_proc (void *thr_arg)
277	{	625	{
278	aio_req req;	626	aio_req req;
…		…
304		652
305	type = req->type;	653	type = req->type;
306		654
307	switch (type)	655	switch (type)
308	{	656	{
309	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;	657	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;	658	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
311	#if SYS_readahead	659
312	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	660	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
313	#else	661	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		662
317	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	663	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
318	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	664	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
319	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	665	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
320		666
321	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	667	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
322	case REQ_CLOSE: req->result = close (req->fd); break;	668	case REQ_CLOSE: req->result = close (req->fd); break;
323	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	669	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
		670	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		671	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		672	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
		673	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
324		674
		675	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
325	case REQ_FSYNC: req->result = fsync (req->fd); break;	676	case REQ_FSYNC: req->result = fsync (req->fd); break;
326	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	677	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
327		678
328	case REQ_QUIT:	679	case REQ_QUIT:
329	break;	680	break;
330		681
331	default:	682	default:
…		…
357	while (type != REQ_QUIT);	708	while (type != REQ_QUIT);
358		709
359	return 0;	710	return 0;
360	}	711	}
361		712
		713	/*****************************************************************************/
		714
		715	static void atfork_prepare (void)
		716	{
		717	pthread_mutex_lock (&reqlock);
		718	pthread_mutex_lock (&reslock);
		719	#if !HAVE_PREADWRITE
		720	pthread_mutex_lock (&preadwritelock);
		721	#endif
		722	#if !HAVE_READDIR_R
		723	pthread_mutex_lock (&readdirlock);
		724	#endif
		725	}
		726
		727	static void atfork_parent (void)
		728	{
		729	#if !HAVE_READDIR_R
		730	pthread_mutex_unlock (&readdirlock);
		731	#endif
		732	#if !HAVE_PREADWRITE
		733	pthread_mutex_unlock (&preadwritelock);
		734	#endif
		735	pthread_mutex_unlock (&reslock);
		736	pthread_mutex_unlock (&reqlock);
		737	}
		738
		739	static void atfork_child (void)
		740	{
		741	aio_req prv;
		742
		743	started = 0;
		744
		745	while (reqs)
		746	{
		747	prv = reqs;
		748	reqs = prv->next;
		749	free_req (prv);
		750	}
		751
		752	reqs = reqe = 0;
		753
		754	while (ress)
		755	{
		756	prv = ress;
		757	ress = prv->next;
		758	free_req (prv);
		759	}
		760
		761	ress = rese = 0;
		762
		763	close (respipe [0]);
		764	close (respipe [1]);
		765	create_pipe ();
		766
		767	atfork_parent ();
		768	}
		769
		770	#define dREQ \
		771	aio_req req; \
		772	\
		773	if (SvOK (callback) && !SvROK (callback)) \
		774	croak ("clalback must be undef or of reference type"); \
		775	\
		776	Newz (0, req, 1, aio_cb); \
		777	if (!req) \
		778	croak ("out of memory during aio_req allocation"); \
		779	\
		780	req->callback = newSVsv (callback);
		781
362	MODULE = IO::AIO PACKAGE = IO::AIO	782	MODULE = IO::AIO PACKAGE = IO::AIO
363		783
		784	PROTOTYPES: ENABLE
		785
364	BOOT:	786	BOOT:
365	{	787	{
366	if (pipe (respipe))	788	HV *stash = gv_stashpv ("IO::AIO", 1);
367	croak ("unable to initialize result pipe");	789	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		790	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		791	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
368		792
369	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	793	create_pipe ();
370	croak ("cannot set result pipe to nonblocking mode");	794	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	}	795	}
375		796
376	void	797	void
377	min_parallel(nthreads)	798	min_parallel (nthreads)
378	int nthreads	799	int nthreads
379	PROTOTYPE: $	800	PROTOTYPE: $
380	CODE:
381	while (nthreads > started)
382	start_thread ();
383		801
384	void	802	void
385	max_parallel(nthreads)	803	max_parallel (nthreads)
386	int nthreads	804	int nthreads
387	PROTOTYPE: $	805	PROTOTYPE: $
		806
		807	int
		808	max_outstanding (nreqs)
		809	int nreqs
		810	PROTOTYPE: $
388	CODE:	811	CODE:
389	{	812	RETVAL = max_outstanding;
390	int cur = started;	813	max_outstanding = nreqs;
391	while (cur > nthreads)
392	{
393	end_thread ();
394	cur--;
395	}
396		814
397	while (started > nthreads)
398	{
399	poll_wait ();
400	poll_cb (aTHX);
401	}
402	}
403
404	void	815	void
405	aio_open(pathname,flags,mode,callback)	816	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
406	SV * pathname	817	SV * pathname
407	int flags	818	int flags
408	int mode	819	int mode
409	SV * callback	820	SV * callback
410	PROTOTYPE: $$$$	821	PROTOTYPE: $$$;$
411	CODE:	822	CODE:
412	{	823	{
413	aio_req req;	824	dREQ;
414
415	Newz (0, req, 1, aio_cb);
416
417	if (!req)
418	croak ("out of memory during aio_req allocation");
419		825
420	req->type = REQ_OPEN;	826	req->type = REQ_OPEN;
421	req->data = newSVsv (pathname);	827	req->data = newSVsv (pathname);
422	req->dataptr = SvPV_nolen (req->data);	828	req->dataptr = SvPVbyte_nolen (req->data);
423	req->fd = flags;	829	req->fd = flags;
424	req->mode = mode;	830	req->mode = mode;
425	req->callback = SvREFCNT_inc (callback);
426		831
427	send_req (req);	832	send_req (req);
428	}	833	}
429		834
430	void	835	void
431	aio_close(fh,callback)	836	aio_close (fh,callback=&PL_sv_undef)
432	InputStream fh	837	SV * fh
433	SV * callback	838	SV * callback
434	PROTOTYPE: $$	839	PROTOTYPE: $;$
435	ALIAS:	840	ALIAS:
436	aio_close = REQ_CLOSE	841	aio_close = REQ_CLOSE
437	aio_fsync = REQ_FSYNC	842	aio_fsync = REQ_FSYNC
438	aio_fdatasync = REQ_FDATASYNC	843	aio_fdatasync = REQ_FDATASYNC
439	CODE:	844	CODE:
440	{	845	{
		846	dREQ;
		847
		848	req->type = ix;
		849	req->fh = newSVsv (fh);
		850	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
		851
		852	send_req (req);
		853	}
		854
		855	void
		856	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
		857	SV * fh
		858	UV offset
		859	UV length
		860	SV * data
		861	UV dataoffset
		862	SV * callback
		863	ALIAS:
		864	aio_read = REQ_READ
		865	aio_write = REQ_WRITE
		866	PROTOTYPE: $$$$$;$
		867	CODE:
		868	{
441	aio_req req;	869	aio_req req;
		870	STRLEN svlen;
		871	char *svptr = SvPVbyte (data, svlen);
442		872
443	Newz (0, req, 1, aio_cb);	873	SvUPGRADE (data, SVt_PV);
		874	SvPOK_on (data);
444		875
445	if (!req)	876	if (dataoffset < 0)
446	croak ("out of memory during aio_req allocation");	877	dataoffset += svlen;
447		878
448	req->type = ix;	879	if (dataoffset < 0 \|\| dataoffset > svlen)
449	req->fd = PerlIO_fileno (fh);	880	croak ("data offset outside of string");
450	req->callback = SvREFCNT_inc (callback);
451		881
452	send_req (req);	882	if (ix == REQ_WRITE)
453	}	883	{
454		884	/* write: check length and adjust. */
455	void	885	if (length < 0 \|\| length + dataoffset > svlen)
456	aio_read(fh,offset,length,data,dataoffset,callback)	886	length = svlen - dataoffset;
457	InputStream fh	887	}
458	UV offset	888	else
459	IV length	889	{
460	SV * data	890	/* read: grow scalar as necessary */
461	IV dataoffset	891	svptr = SvGROW (data, length + dataoffset);
462	SV * callback	892	}
463	PROTOTYPE: $$$$$$
464	CODE:
465	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
466
467	void
468	aio_write(fh,offset,length,data,dataoffset,callback)
469	OutputStream fh
470	UV offset
471	IV length
472	SV * data
473	IV dataoffset
474	SV * callback
475	PROTOTYPE: $$$$$$
476	CODE:
477	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
478
479	void
480	aio_readahead(fh,offset,length,callback)
481	InputStream fh
482	UV offset
483	IV length
484	SV * callback
485	PROTOTYPE: $$$$
486	CODE:
487	{
488	aio_req req;
489		893
490	if (length < 0)	894	if (length < 0)
491	croak ("length must not be negative");	895	croak ("length must not be negative");
492		896
493	Newz (0, req, 1, aio_cb);	897	{
		898	dREQ;
494		899
495	if (!req)	900	req->type = ix;
496	croak ("out of memory during aio_req allocation");	901	req->fh = newSVsv (fh);
		902	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
		903	: IoOFP (sv_2io (fh)));
		904	req->offset = offset;
		905	req->length = length;
		906	req->data = SvREFCNT_inc (data);
		907	req->dataptr = (char *)svptr + dataoffset;
		908
		909	if (!SvREADONLY (data))
		910	{
		911	SvREADONLY_on (data);
		912	req->data2ptr = (void *)data;
		913	}
		914
		915	send_req (req);
		916	}
		917	}
		918
		919	void
		920	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		921	SV * out_fh
		922	SV * in_fh
		923	UV in_offset
		924	UV length
		925	SV * callback
		926	PROTOTYPE: $$$$;$
		927	CODE:
		928	{
		929	dREQ;
		930
		931	req->type = REQ_SENDFILE;
		932	req->fh = newSVsv (out_fh);
		933	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		934	req->fh2 = newSVsv (in_fh);
		935	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		936	req->offset = in_offset;
		937	req->length = length;
		938
		939	send_req (req);
		940	}
		941
		942	void
		943	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
		944	SV * fh
		945	UV offset
		946	IV length
		947	SV * callback
		948	PROTOTYPE: $$$;$
		949	CODE:
		950	{
		951	dREQ;
497		952
498	req->type = REQ_READAHEAD;	953	req->type = REQ_READAHEAD;
		954	req->fh = newSVsv (fh);
499	req->fd = PerlIO_fileno (fh);	955	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
500	req->offset = offset;	956	req->offset = offset;
501	req->length = length;	957	req->length = length;
502	req->callback = SvREFCNT_inc (callback);
503		958
504	send_req (req);	959	send_req (req);
505	}	960	}
506		961
507	void	962	void
508	aio_stat(fh_or_path,callback)	963	aio_stat (fh_or_path,callback=&PL_sv_undef)
509	SV * fh_or_path	964	SV * fh_or_path
510	SV * callback	965	SV * callback
511	PROTOTYPE: $$
512	ALIAS:	966	ALIAS:
		967	aio_stat = REQ_STAT
513	aio_lstat = 1	968	aio_lstat = REQ_LSTAT
514	CODE:	969	CODE:
515	{	970	{
516	aio_req req;	971	dREQ;
517
518	Newz (0, req, 1, aio_cb);
519
520	if (!req)
521	croak ("out of memory during aio_req allocation");
522		972
523	New (0, req->statdata, 1, Stat_t);	973	New (0, req->statdata, 1, Stat_t);
524
525	if (!req->statdata)	974	if (!req->statdata)
		975	{
		976	free_req (req);
526	croak ("out of memory during aio_req->statdata allocation");	977	croak ("out of memory during aio_req->statdata allocation");
		978	}
527		979
528	if (SvPOK (fh_or_path))	980	if (SvPOK (fh_or_path))
529	{	981	{
530	req->type = ix ? REQ_LSTAT : REQ_STAT;	982	req->type = ix;
531	req->data = newSVsv (fh_or_path);	983	req->data = newSVsv (fh_or_path);
532	req->dataptr = SvPV_nolen (req->data);	984	req->dataptr = SvPVbyte_nolen (req->data);
533	}	985	}
534	else	986	else
535	{	987	{
536	req->type = REQ_FSTAT;	988	req->type = REQ_FSTAT;
		989	req->fh = newSVsv (fh_or_path);
537	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	990	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
538	}	991	}
539		992
540	req->callback = SvREFCNT_inc (callback);
541
542	send_req (req);	993	send_req (req);
543	}	994	}
544		995
545	void	996	void
546	aio_unlink(pathname,callback)	997	aio_unlink (pathname,callback=&PL_sv_undef)
547	SV * pathname	998	SV * pathname
548	SV * callback	999	SV * callback
549	PROTOTYPE: $$	1000	ALIAS:
		1001	aio_unlink = REQ_UNLINK
		1002	aio_rmdir = REQ_RMDIR
		1003	aio_readdir = REQ_READDIR
550	CODE:	1004	CODE:
551	{	1005	{
552	aio_req req;	1006	dREQ;
553		1007
554	Newz (0, req, 1, aio_cb);	1008	req->type = ix;
555
556	if (!req)
557	croak ("out of memory during aio_req allocation");
558
559	req->type = REQ_UNLINK;
560	req->data = newSVsv (pathname);	1009	req->data = newSVsv (pathname);
561	req->dataptr = SvPV_nolen (req->data);	1010	req->dataptr = SvPVbyte_nolen (req->data);
562	req->callback = SvREFCNT_inc (callback);
563		1011
564	send_req (req);	1012	send_req (req);
565	}	1013	}
		1014
		1015	void
		1016	aio_link (oldpath,newpath,callback=&PL_sv_undef)
		1017	SV * oldpath
		1018	SV * newpath
		1019	SV * callback
		1020	ALIAS:
		1021	aio_link = REQ_LINK
		1022	aio_symlink = REQ_SYMLINK
		1023	aio_rename = REQ_RENAME
		1024	CODE:
		1025	{
		1026	dREQ;
		1027
		1028	req->type = ix;
		1029	req->fh = newSVsv (oldpath);
		1030	req->data2ptr = SvPVbyte_nolen (req->fh);
		1031	req->data = newSVsv (newpath);
		1032	req->dataptr = SvPVbyte_nolen (req->data);
		1033
		1034	send_req (req);
		1035	}
		1036
		1037	#if 0
		1038
		1039	# undocumented, because it does not cancel active requests
		1040	void
		1041	cancel_most_requests ()
		1042	PROTOTYPE:
		1043	CODE:
		1044	{
		1045	aio_req *req;
		1046
		1047	pthread_mutex_lock (&reqlock);
		1048	for (req = reqs; req; req = req->next)
		1049	req->flags \|= 1;
		1050	pthread_mutex_unlock (&reqlock);
		1051
		1052	pthread_mutex_lock (&reslock);
		1053	for (req = ress; req; req = req->next)
		1054	req->flags \|= 1;
		1055	pthread_mutex_unlock (&reslock);
		1056	}
		1057
		1058	#endif
		1059
		1060	void
		1061	flush ()
		1062	PROTOTYPE:
		1063	CODE:
		1064	while (nreqs)
		1065	{
		1066	poll_wait ();
		1067	poll_cb ();
		1068	}
		1069
		1070	void
		1071	poll()
		1072	PROTOTYPE:
		1073	CODE:
		1074	if (nreqs)
		1075	{
		1076	poll_wait ();
		1077	poll_cb ();
		1078	}
566		1079
567	int	1080	int
568	poll_fileno()	1081	poll_fileno()
569	PROTOTYPE:	1082	PROTOTYPE:
570	CODE:	1083	CODE:
…		…
574		1087
575	int	1088	int
576	poll_cb(...)	1089	poll_cb(...)
577	PROTOTYPE:	1090	PROTOTYPE:
578	CODE:	1091	CODE:
579	RETVAL = poll_cb (aTHX);	1092	RETVAL = poll_cb ();
580	OUTPUT:	1093	OUTPUT:
581	RETVAL	1094	RETVAL
582		1095
583	void	1096	void
584	poll_wait()	1097	poll_wait()

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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 1.42 by root, Fri Jul 21 07:35:31 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 1.42 by root, Fri Jul 21 07:35:31 2006 UTC