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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.1 by root, Sun Jul 10 17:07:44 2005 UTC vs.
Revision 1.40 by root, Sat Jun 24 16:27:02 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>
7	#include <sys/types.h>	13	#include <sys/types.h>
8	#include <sys/stat.h>	14	#include <sys/stat.h>
		15	#include <limits.h>
9	#include <unistd.h>	16	#include <unistd.h>
10	#include <fcntl.h>	17	#include <fcntl.h>
11	#include <signal.h>	18	#include <signal.h>
12	#include <sched.h>	19	#include <sched.h>
13	#include <endian.h>
14		20
15	#include <pthread.h>	21	#if HAVE_SENDFILE
		22	# if __linux
		23	# include <sys/sendfile.h>
		24	# elif __freebsd
16	#include <sys/syscall.h>	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
17		35
18	typedef void InputStream; / hack, but 5.6.1 is simply toooo old ;) */	36	/* used for struct dirent, AIX doesn't provide it */
19	typedef void OutputStream; / hack, but 5.6.1 is simply toooo old ;) */	37	#ifndef NAME_MAX
20	typedef void InOutStream; / hack, but 5.6.1 is simply toooo old ;) */	38	# define NAME_MAX 4096
		39	#endif
21		40
22	#if __i386 \|\| __amd64
23	# define STACKSIZE ( 256 * sizeof (long))
24	#elif __ia64	41	#if __ia64
25	# define STACKSIZE (8192 * sizeof (long))	42	# define STACKSIZE 65536
26	#else	43	#else
27	# define STACKSIZE ( 512 * sizeof (long))	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, REQ_UNLINK,	52	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,	53	REQ_FSYNC, REQ_FDATASYNC,
		54	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
		55	REQ_READDIR,
		56	REQ_LINK, REQ_SYMLINK,
36	};	57	};
37		58
38	typedef struct aio_cb {	59	typedef struct aio_cb {
39	struct aio_cb *next;	60	struct aio_cb *volatile next;
40		61
41	int type;	62	int type;
42		63
		64	/* should receive a cleanup, with unions */
43	int fd;	65	int fd, fd2;
44	off_t offset;	66	off_t offset;
45	size_t length;	67	size_t length;
46	ssize_t result;	68	ssize_t result;
47	mode_t mode; /* open */	69	mode_t mode; /* open */
48	int errorno;	70	int errorno;
49	SV data, callback;	71	SV data, callback;
50	void *dataptr;	72	SV fh, fh2;
		73	void dataptr, data2ptr;
51	STRLEN dataoffset;	74	STRLEN dataoffset;
52		75
53	Stat_t *statdata;	76	Stat_t *statdata;
54	} aio_cb;	77	} aio_cb;
55		78
56	typedef aio_cb *aio_req;	79	typedef aio_cb *aio_req;
57		80
58	static int started;	81	static int started, wanted;
59	static int nreqs;	82	static volatile int nreqs;
		83	static int max_outstanding = 1<<30;
60	static int reqpipe[2], respipe[2];	84	static int respipe [2];
61		85
		86	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
		87	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
		88	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
		89
62	static aio_req qs, qe; /* queue start, queue end */	90	static volatile aio_req reqs, reqe; /* queue start, queue end */
		91	static volatile aio_req ress, rese; /* queue start, queue end */
63		92
64	static void aio_proc(void arg);	93	static void free_req (aio_req req)
65
66	static void
67	start_thread (void)
68	{	94	{
69	sigset_t fullsigset, oldsigset;	95	if (req->data)
70	pthread_t tid;	96	SvREFCNT_dec (req->data);
71	pthread_attr_t attr;
72		97
73	pthread_attr_init (&attr);
74	pthread_attr_setstacksize (&attr, STACKSIZE);
75	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
76
77	sigfillset (&fullsigset);
78	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
79
80	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
81	started++;
82
83	sigprocmask (SIG_SETMASK, &oldsigset, 0);
84	}
85
86	static void
87	send_reqs (void)
88	{
89	/* this write is atomic */
90	while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
91	{
92	qs = qs->next;
93	if (!qs) qe = 0;
94	}
95	}
96
97	static void
98	send_req (aio_req req)
99	{
100	nreqs++;
101	req->next = 0;
102
103	if (qe)
104	{
105	qe->next = req;
106	qe = req;
107	}
108	else
109	qe = qs = req;
110
111	send_reqs ();
112	}
113
114	static void
115	end_thread (void)
116	{
117	aio_req req;
118	New (0, req, 1, aio_cb);
119	req->type = REQ_QUIT;
120
121	send_req (req);
122	}
123
124	static void
125	read_write (pTHX_
126	int dowrite, int fd, off_t offset, size_t length,
127	SV data, STRLEN dataoffset, SV callback)
128	{
129	aio_req req;
130	STRLEN svlen;
131	char *svptr = SvPV (data, svlen);
132
133	SvUPGRADE (data, SVt_PV);
134	SvPOK_on (data);
135
136	if (dataoffset < 0)
137	dataoffset += svlen;
138
139	if (dataoffset < 0 \|\| dataoffset > svlen)
140	croak ("data offset outside of string");
141
142	if (dowrite)
143	{
144	/* write: check length and adjust. */
145	if (length < 0 \|\| length + dataoffset > svlen)
146	length = svlen - dataoffset;
147	}
148	else
149	{
150	/* read: grow scalar as necessary */
151	svptr = SvGROW (data, length + dataoffset);
152	}
153
154	if (length < 0)
155	croak ("length must not be negative");
156
157	Newz (0, req, 1, aio_cb);
158
159	if (!req)	98	if (req->fh)
160	croak ("out of memory during aio_req allocation");	99	SvREFCNT_dec (req->fh);
161		100
162	req->type = dowrite ? REQ_WRITE : REQ_READ;	101	if (req->fh2)
163	req->fd = fd;	102	SvREFCNT_dec (req->fh2);
164	req->offset = offset;
165	req->length = length;
166	req->data = SvREFCNT_inc (data);
167	req->dataptr = (char *)svptr + dataoffset;
168	req->callback = SvREFCNT_inc (callback);
169		103
170	send_req (req);	104	if (req->statdata)
		105	Safefree (req->statdata);
		106
		107	if (req->callback)
		108	SvREFCNT_dec (req->callback);
		109
		110	if (req->type == REQ_READDIR && req->result >= 0)
		111	free (req->data2ptr);
		112
		113	Safefree (req);
171	}	114	}
172		115
173	static void	116	static void
174	poll_wait ()	117	poll_wait ()
175	{	118	{
		119	if (nreqs && !ress)
		120	{
176	fd_set rfd;	121	fd_set rfd;
177	FD_ZERO(&rfd);	122	FD_ZERO(&rfd);
178	FD_SET(respipe[0], &rfd);	123	FD_SET(respipe [0], &rfd);
179		124
180	select (respipe[0] + 1, &rfd, 0, 0, 0);	125	select (respipe [0] + 1, &rfd, 0, 0, 0);
		126	}
181	}	127	}
182		128
183	static int	129	static int
184	poll_cb (pTHX)	130	poll_cb ()
185	{	131	{
186	dSP;	132	dSP;
187	int count = 0;	133	int count = 0;
		134	int do_croak = 0;
188	aio_req req;	135	aio_req req;
189		136
190	while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))	137	for (;;)
191	{	138	{
		139	pthread_mutex_lock (&reslock);
		140	req = ress;
		141
		142	if (req)
		143	{
		144	ress = req->next;
		145
		146	if (!ress)
		147	{
		148	/* read any signals sent by the worker threads */
		149	char buf [32];
		150	while (read (respipe [0], buf, 32) == 32)
		151	;
		152
		153	rese = 0;
		154	}
		155	}
		156
		157	pthread_mutex_unlock (&reslock);
		158
		159	if (!req)
		160	break;
		161
192	nreqs--;	162	nreqs--;
193		163
194	if (req->type == REQ_QUIT)	164	if (req->type == REQ_QUIT)
195	started--;	165	started--;
196	else	166	else
197	{	167	{
198	int errorno = errno;	168	int errorno = errno;
199	errno = req->errorno;	169	errno = req->errorno;
200		170
201	if (req->type == REQ_READ)	171	if (req->type == REQ_READ)
202	SvCUR_set (req->data, req->dataoffset	172	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
203	+ req->result > 0 ? req->result : 0);
204		173
		174	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
		175	SvREADONLY_off (req->data);
		176
205	if (req->data)	177	if (req->statdata)
206	SvREFCNT_dec (req->data);
207
208	if (req->type == REQ_STAT \|\| req->type == REQ_LSTAT \|\| req->type == REQ_FSTAT)
209	{	178	{
210	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	179	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
211	PL_laststatval = req->result;	180	PL_laststatval = req->result;
212	PL_statcache = *(req->statdata);	181	PL_statcache = *(req->statdata);
213
214	Safefree (req->statdata);
215	}	182	}
216		183
		184	ENTER;
217	PUSHMARK (SP);	185	PUSHMARK (SP);
		186
		187	if (req->type == REQ_READDIR)
		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	{
218	XPUSHs (sv_2mortal (newSViv (req->result)));	212	XPUSHs (sv_2mortal (newSViv (req->result)));
		213
		214	if (req->type == REQ_OPEN)
		215	{
		216	/* convert fd to fh */
		217	SV *fh;
		218
		219	PUTBACK;
		220	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		221	SPAGAIN;
		222
		223	fh = SvREFCNT_inc (POPs);
		224
		225	PUSHMARK (SP);
		226	XPUSHs (sv_2mortal (fh));
		227	}
		228	}
		229
		230	if (SvOK (req->callback))
		231	{
219	PUTBACK;	232	PUTBACK;
220	call_sv (req->callback, G_VOID);	233	call_sv (req->callback, G_VOID \| G_EVAL);
221	SPAGAIN;	234	SPAGAIN;
		235
		236	if (SvTRUE (ERRSV))
		237	{
		238	free_req (req);
		239	croak (0);
		240	}
222		241	}
223	if (req->callback)	242
224	SvREFCNT_dec (req->callback);	243	LEAVE;
225		244
226	errno = errorno;	245	errno = errorno;
227	count++;	246	count++;
228	}	247	}
229		248
230	Safefree (req);	249	free_req (req);
231	}	250	}
232
233	if (qs)
234	send_reqs ();
235		251
236	return count;	252	return count;
237	}	253	}
		254
		255	static void aio_proc(void arg);
		256
		257	static void
		258	start_thread (void)
		259	{
		260	sigset_t fullsigset, oldsigset;
		261	pthread_t tid;
		262	pthread_attr_t attr;
		263
		264	pthread_attr_init (&attr);
		265	pthread_attr_setstacksize (&attr, STACKSIZE);
		266	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		267
		268	sigfillset (&fullsigset);
		269	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
		270
		271	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
		272	started++;
		273
		274	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		275	}
		276
		277	static void
		278	send_req (aio_req req)
		279	{
		280	while (started < wanted && nreqs >= started)
		281	start_thread ();
		282
		283	nreqs++;
		284
		285	pthread_mutex_lock (&reqlock);
		286
		287	req->next = 0;
		288
		289	if (reqe)
		290	{
		291	reqe->next = req;
		292	reqe = req;
		293	}
		294	else
		295	reqe = reqs = req;
		296
		297	pthread_cond_signal (&reqwait);
		298	pthread_mutex_unlock (&reqlock);
		299
		300	if (nreqs > max_outstanding)
		301	for (;;)
		302	{
		303	poll_cb ();
		304
		305	if (nreqs <= max_outstanding)
		306	break;
		307
		308	poll_wait ();
		309	}
		310	}
		311
		312	static void
		313	end_thread (void)
		314	{
		315	aio_req req;
		316	Newz (0, req, 1, aio_cb);
		317	req->type = REQ_QUIT;
		318
		319	send_req (req);
		320	}
		321
		322	static void min_parallel (int nthreads)
		323	{
		324	if (wanted < nthreads)
		325	wanted = nthreads;
		326	}
		327
		328	static void max_parallel (int nthreads)
		329	{
		330	int cur = started;
		331
		332	if (wanted > nthreads)
		333	wanted = nthreads;
		334
		335	while (cur > wanted)
		336	{
		337	end_thread ();
		338	cur--;
		339	}
		340
		341	while (started > wanted)
		342	{
		343	poll_wait ();
		344	poll_cb ();
		345	}
		346	}
		347
		348	static void create_pipe ()
		349	{
		350	if (pipe (respipe))
		351	croak ("unable to initialize result pipe");
		352
		353	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
		354	croak ("cannot set result pipe to nonblocking mode");
		355
		356	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		357	croak ("cannot set result pipe to nonblocking mode");
		358	}
		359
		360	/*****************************************************************************/
		361	/* work around various missing functions */
		362
		363	#if !HAVE_PREADWRITE
		364	# define pread aio_pread
		365	# define pwrite aio_pwrite
		366
		367	/*
		368	* make our pread/pwrite safe against themselves, but not against
		369	* normal read/write by using a mutex. slows down execution a lot,
		370	* but that's your problem, not mine.
		371	*/
		372	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
		373
		374	static ssize_t
		375	pread (int fd, void *buf, size_t count, off_t offset)
		376	{
		377	ssize_t res;
		378	off_t ooffset;
		379
		380	pthread_mutex_lock (&preadwritelock);
		381	ooffset = lseek (fd, 0, SEEK_CUR);
		382	lseek (fd, offset, SEEK_SET);
		383	res = read (fd, buf, count);
		384	lseek (fd, ooffset, SEEK_SET);
		385	pthread_mutex_unlock (&preadwritelock);
		386
		387	return res;
		388	}
		389
		390	static ssize_t
		391	pwrite (int fd, void *buf, size_t count, off_t offset)
		392	{
		393	ssize_t res;
		394	off_t ooffset;
		395
		396	pthread_mutex_lock (&preadwritelock);
		397	ooffset = lseek (fd, 0, SEEK_CUR);
		398	lseek (fd, offset, SEEK_SET);
		399	res = write (fd, buf, count);
		400	lseek (fd, offset, SEEK_SET);
		401	pthread_mutex_unlock (&preadwritelock);
		402
		403	return res;
		404	}
		405	#endif
		406
		407	#if !HAVE_FDATASYNC
		408	# define fdatasync fsync
		409	#endif
		410
		411	#if !HAVE_READAHEAD
		412	# define readahead aio_readahead
		413
		414	static ssize_t
		415	readahead (int fd, off_t offset, size_t count)
		416	{
		417	char readahead_buf[4096];
		418
		419	while (count > 0)
		420	{
		421	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
		422
		423	pread (fd, readahead_buf, len, offset);
		424	offset += len;
		425	count -= len;
		426	}
		427
		428	errno = 0;
		429	}
		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	}
		619
		620	/*****************************************************************************/
238		621
239	static void *	622	static void *
240	aio_proc (void *thr_arg)	623	aio_proc (void *thr_arg)
241	{	624	{
242	aio_req req;	625	aio_req req;
		626	int type;
243		627
244	/* then loop */	628	do
245	while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))	629	{
		630	pthread_mutex_lock (&reqlock);
		631
		632	for (;;)
		633	{
		634	req = reqs;
		635
		636	if (reqs)
		637	{
		638	reqs = reqs->next;
		639	if (!reqs) reqe = 0;
		640	}
		641
		642	if (req)
		643	break;
		644
		645	pthread_cond_wait (&reqwait, &reqlock);
		646	}
		647
		648	pthread_mutex_unlock (&reqlock);
246	{	649
247	errno = 0; /* strictly unnecessary */	650	errno = 0; /* strictly unnecessary */
248		651
		652	type = req->type;
		653
249	switch (req->type)	654	switch (type)
250	{	655	{
251	case REQ_READ: req->result = pread64 (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;
252	case REQ_WRITE: req->result = pwrite64 (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;
253	#if SYS_readahead	658
254	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;
255	#else	660	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
256	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
257	#endif
258		661
259	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	662	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
260	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	663	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
261	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	664	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
262		665
263	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	666	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
264	case REQ_CLOSE: req->result = close (req->fd); break;	667	case REQ_CLOSE: req->result = close (req->fd); break;
265	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	668	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
		669	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		670	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		671	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
		672	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
266		673
		674	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
267	case REQ_FSYNC: req->result = fsync (req->fd); break;	675	case REQ_FSYNC: req->result = fsync (req->fd); break;
268	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	676	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
269		677
270	case REQ_QUIT:	678	case REQ_QUIT:
271	write (respipe[1], (void *)&req, sizeof (req));	679	break;
272	return 0;
273		680
274	default:	681	default:
275	req->result = ENOSYS;	682	req->result = ENOSYS;
276	break;	683	break;
277	}	684	}
278		685
279	req->errorno = errno;	686	req->errorno = errno;
280	write (respipe[1], (void *)&req, sizeof (req));	687
		688	pthread_mutex_lock (&reslock);
		689
		690	req->next = 0;
		691
		692	if (rese)
		693	{
		694	rese->next = req;
		695	rese = req;
		696	}
		697	else
		698	{
		699	rese = ress = req;
		700
		701	/* write a dummy byte to the pipe so fh becomes ready */
		702	write (respipe [1], &respipe, 1);
		703	}
		704
		705	pthread_mutex_unlock (&reslock);
281	}	706	}
		707	while (type != REQ_QUIT);
282		708
283	return 0;	709	return 0;
284	}	710	}
285		711
		712	/*****************************************************************************/
		713
		714	static void atfork_prepare (void)
		715	{
		716	pthread_mutex_lock (&reqlock);
		717	pthread_mutex_lock (&reslock);
		718	#if !HAVE_PREADWRITE
		719	pthread_mutex_lock (&preadwritelock);
		720	#endif
		721	#if !HAVE_READDIR_R
		722	pthread_mutex_lock (&readdirlock);
		723	#endif
		724	}
		725
		726	static void atfork_parent (void)
		727	{
		728	#if !HAVE_READDIR_R
		729	pthread_mutex_unlock (&readdirlock);
		730	#endif
		731	#if !HAVE_PREADWRITE
		732	pthread_mutex_unlock (&preadwritelock);
		733	#endif
		734	pthread_mutex_unlock (&reslock);
		735	pthread_mutex_unlock (&reqlock);
		736	}
		737
		738	static void atfork_child (void)
		739	{
		740	aio_req prv;
		741
		742	started = 0;
		743
		744	while (reqs)
		745	{
		746	prv = reqs;
		747	reqs = prv->next;
		748	free_req (prv);
		749	}
		750
		751	reqs = reqe = 0;
		752
		753	while (ress)
		754	{
		755	prv = ress;
		756	ress = prv->next;
		757	free_req (prv);
		758	}
		759
		760	ress = rese = 0;
		761
		762	close (respipe [0]);
		763	close (respipe [1]);
		764	create_pipe ();
		765
		766	atfork_parent ();
		767	}
		768
		769	#define dREQ \
		770	aio_req req; \
		771	\
		772	if (SvOK (callback) && !SvROK (callback)) \
		773	croak ("clalback must be undef or of reference type"); \
		774	\
		775	Newz (0, req, 1, aio_cb); \
		776	if (!req) \
		777	croak ("out of memory during aio_req allocation"); \
		778	\
		779	req->callback = newSVsv (callback);
		780
286	MODULE = IO::AIO PACKAGE = IO::AIO	781	MODULE = IO::AIO PACKAGE = IO::AIO
287		782
		783	PROTOTYPES: ENABLE
		784
288	BOOT:	785	BOOT:
289	{	786	{
290	if (pipe (reqpipe) \|\| pipe (respipe))	787	create_pipe ();
291	croak ("unable to initialize request or result pipe");	788	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
292
293	if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))
294	croak ("cannot set result pipe to nonblocking mode");
295
296	if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
297	croak ("cannot set result pipe to nonblocking mode");
298	}	789	}
299		790
300	void	791	void
301	min_parallel(nthreads)	792	min_parallel (nthreads)
302	int nthreads	793	int nthreads
303	PROTOTYPE: $	794	PROTOTYPE: $
304	CODE:
305	while (nthreads > started)
306	start_thread ();
307		795
308	void	796	void
309	max_parallel(nthreads)	797	max_parallel (nthreads)
310	int nthreads	798	int nthreads
311	PROTOTYPE: $	799	PROTOTYPE: $
		800
		801	int
		802	max_outstanding (nreqs)
		803	int nreqs
		804	PROTOTYPE: $
312	CODE:	805	CODE:
313	{	806	RETVAL = max_outstanding;
314	int cur = started;	807	max_outstanding = nreqs;
315	while (cur > nthreads)
316	{
317	end_thread ();
318	cur--;
319	}
320		808
321	while (started > nthreads)
322	{
323	poll_wait ();
324	poll_cb (aTHX);
325	}
326	}
327
328	void	809	void
329	aio_open(pathname,flags,mode,callback)	810	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
330	SV * pathname	811	SV * pathname
331	int flags	812	int flags
332	int mode	813	int mode
333	SV * callback	814	SV * callback
334	PROTOTYPE: $$$$	815	PROTOTYPE: $$$;$
335	CODE:	816	CODE:
336	{	817	{
337	aio_req req;	818	dREQ;
338
339	Newz (0, req, 1, aio_cb);
340
341	if (!req)
342	croak ("out of memory during aio_req allocation");
343		819
344	req->type = REQ_OPEN;	820	req->type = REQ_OPEN;
345	req->data = newSVsv (pathname);	821	req->data = newSVsv (pathname);
346	req->dataptr = SvPV_nolen (req->data);	822	req->dataptr = SvPVbyte_nolen (req->data);
347	req->fd = flags;	823	req->fd = flags;
348	req->mode = mode;	824	req->mode = mode;
349	req->callback = SvREFCNT_inc (callback);
350		825
351	send_req (req);	826	send_req (req);
352	}	827	}
353		828
354	void	829	void
355	aio_close(fh,callback)	830	aio_close (fh,callback=&PL_sv_undef)
356	InputStream fh	831	SV * fh
357	SV * callback	832	SV * callback
358	PROTOTYPE: $$	833	PROTOTYPE: $;$
359	ALIAS:	834	ALIAS:
360	aio_close = REQ_CLOSE	835	aio_close = REQ_CLOSE
361	aio_fsync = REQ_FSYNC	836	aio_fsync = REQ_FSYNC
362	aio_fdatasync = REQ_FDATASYNC	837	aio_fdatasync = REQ_FDATASYNC
363	CODE:	838	CODE:
364	{	839	{
		840	dREQ;
		841
		842	req->type = ix;
		843	req->fh = newSVsv (fh);
		844	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
		845
		846	send_req (req);
		847	}
		848
		849	void
		850	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
		851	SV * fh
		852	UV offset
		853	UV length
		854	SV * data
		855	UV dataoffset
		856	SV * callback
		857	ALIAS:
		858	aio_read = REQ_READ
		859	aio_write = REQ_WRITE
		860	PROTOTYPE: $$$$$;$
		861	CODE:
		862	{
365	aio_req req;	863	aio_req req;
		864	STRLEN svlen;
		865	char *svptr = SvPVbyte (data, svlen);
366		866
367	Newz (0, req, 1, aio_cb);	867	SvUPGRADE (data, SVt_PV);
		868	SvPOK_on (data);
368		869
369	if (!req)	870	if (dataoffset < 0)
370	croak ("out of memory during aio_req allocation");	871	dataoffset += svlen;
371		872
372	req->type = ix;	873	if (dataoffset < 0 \|\| dataoffset > svlen)
373	req->fd = PerlIO_fileno (fh);	874	croak ("data offset outside of string");
374	req->callback = SvREFCNT_inc (callback);
375		875
376	send_req (req);	876	if (ix == REQ_WRITE)
377	}	877	{
378		878	/* write: check length and adjust. */
379	void	879	if (length < 0 \|\| length + dataoffset > svlen)
380	aio_read(fh,offset,length,data,dataoffset,callback)	880	length = svlen - dataoffset;
381	InputStream fh	881	}
382	UV offset	882	else
383	IV length	883	{
384	SV * data	884	/* read: grow scalar as necessary */
385	IV dataoffset	885	svptr = SvGROW (data, length + dataoffset);
386	SV * callback	886	}
387	PROTOTYPE: $$$$$$
388	CODE:
389	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
390
391	void
392	aio_write(fh,offset,length,data,dataoffset,callback)
393	OutputStream fh
394	UV offset
395	IV length
396	SV * data
397	IV dataoffset
398	SV * callback
399	PROTOTYPE: $$$$$$
400	CODE:
401	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
402
403	void
404	aio_readahead(fh,offset,length,callback)
405	InputStream fh
406	UV offset
407	IV length
408	SV * callback
409	PROTOTYPE: $$$$
410	CODE:
411	{
412	aio_req req;
413		887
414	if (length < 0)	888	if (length < 0)
415	croak ("length must not be negative");	889	croak ("length must not be negative");
416		890
417	Newz (0, req, 1, aio_cb);	891	{
		892	dREQ;
418		893
419	if (!req)	894	req->type = ix;
420	croak ("out of memory during aio_req allocation");	895	req->fh = newSVsv (fh);
		896	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
		897	: IoOFP (sv_2io (fh)));
		898	req->offset = offset;
		899	req->length = length;
		900	req->data = SvREFCNT_inc (data);
		901	req->dataptr = (char *)svptr + dataoffset;
		902
		903	if (!SvREADONLY (data))
		904	{
		905	SvREADONLY_on (data);
		906	req->data2ptr = (void *)data;
		907	}
		908
		909	send_req (req);
		910	}
		911	}
		912
		913	void
		914	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		915	SV * out_fh
		916	SV * in_fh
		917	UV in_offset
		918	UV length
		919	SV * callback
		920	PROTOTYPE: $$$$;$
		921	CODE:
		922	{
		923	dREQ;
		924
		925	req->type = REQ_SENDFILE;
		926	req->fh = newSVsv (out_fh);
		927	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		928	req->fh2 = newSVsv (in_fh);
		929	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		930	req->offset = in_offset;
		931	req->length = length;
		932
		933	send_req (req);
		934	}
		935
		936	void
		937	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
		938	SV * fh
		939	UV offset
		940	IV length
		941	SV * callback
		942	PROTOTYPE: $$$;$
		943	CODE:
		944	{
		945	dREQ;
421		946
422	req->type = REQ_READAHEAD;	947	req->type = REQ_READAHEAD;
		948	req->fh = newSVsv (fh);
423	req->fd = PerlIO_fileno (fh);	949	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
424	req->offset = offset;	950	req->offset = offset;
425	req->length = length;	951	req->length = length;
426	req->callback = SvREFCNT_inc (callback);
427		952
428	send_req (req);	953	send_req (req);
429	}	954	}
430		955
431	void	956	void
432	aio_stat(fh_or_path,callback)	957	aio_stat (fh_or_path,callback=&PL_sv_undef)
433	SV * fh_or_path	958	SV * fh_or_path
434	SV * callback	959	SV * callback
435	PROTOTYPE: $$
436	ALIAS:	960	ALIAS:
		961	aio_stat = REQ_STAT
437	aio_lstat = 1	962	aio_lstat = REQ_LSTAT
438	CODE:	963	CODE:
439	{	964	{
440	aio_req req;	965	dREQ;
441
442	Newz (0, req, 1, aio_cb);
443
444	if (!req)
445	croak ("out of memory during aio_req allocation");
446		966
447	New (0, req->statdata, 1, Stat_t);	967	New (0, req->statdata, 1, Stat_t);
448
449	if (!req->statdata)	968	if (!req->statdata)
		969	{
		970	free_req (req);
450	croak ("out of memory during aio_req->statdata allocation");	971	croak ("out of memory during aio_req->statdata allocation");
		972	}
451		973
452	if (SvPOK (fh_or_path))	974	if (SvPOK (fh_or_path))
453	{	975	{
454	req->type = ix ? REQ_LSTAT : REQ_STAT;	976	req->type = ix;
455	req->data = newSVsv (fh_or_path);	977	req->data = newSVsv (fh_or_path);
456	req->dataptr = SvPV_nolen (req->data);	978	req->dataptr = SvPVbyte_nolen (req->data);
457	}	979	}
458	else	980	else
459	{	981	{
460	req->type = REQ_FSTAT;	982	req->type = REQ_FSTAT;
		983	req->fh = newSVsv (fh_or_path);
461	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	984	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
462	}	985	}
463		986
464	req->callback = SvREFCNT_inc (callback);
465
466	send_req (req);	987	send_req (req);
467	}	988	}
468		989
469	void	990	void
470	aio_unlink(pathname,callback)	991	aio_unlink (pathname,callback=&PL_sv_undef)
471	SV * pathname	992	SV * pathname
472	SV * callback	993	SV * callback
473	PROTOTYPE: $$	994	ALIAS:
		995	aio_unlink = REQ_UNLINK
		996	aio_rmdir = REQ_RMDIR
		997	aio_readdir = REQ_READDIR
474	CODE:	998	CODE:
475	{	999	{
476	aio_req req;	1000	dREQ;
477		1001
478	Newz (0, req, 1, aio_cb);	1002	req->type = ix;
479
480	if (!req)
481	croak ("out of memory during aio_req allocation");
482
483	req->type = REQ_UNLINK;
484	req->data = newSVsv (pathname);	1003	req->data = newSVsv (pathname);
485	req->dataptr = SvPV_nolen (req->data);	1004	req->dataptr = SvPVbyte_nolen (req->data);
486	req->callback = SvREFCNT_inc (callback);
487		1005
488	send_req (req);	1006	send_req (req);
489	}	1007	}
		1008
		1009	void
		1010	aio_link (oldpath,newpath,callback=&PL_sv_undef)
		1011	SV * oldpath
		1012	SV * newpath
		1013	SV * callback
		1014	ALIAS:
		1015	aio_link = REQ_LINK
		1016	aio_symlink = REQ_SYMLINK
		1017	aio_rename = REQ_RENAME
		1018	CODE:
		1019	{
		1020	dREQ;
		1021
		1022	req->type = ix;
		1023	req->fh = newSVsv (oldpath);
		1024	req->data2ptr = SvPVbyte_nolen (req->fh);
		1025	req->data = newSVsv (newpath);
		1026	req->dataptr = SvPVbyte_nolen (req->data);
		1027
		1028	send_req (req);
		1029	}
		1030
		1031	void
		1032	flush ()
		1033	PROTOTYPE:
		1034	CODE:
		1035	while (nreqs)
		1036	{
		1037	poll_wait ();
		1038	poll_cb ();
		1039	}
		1040
		1041	void
		1042	poll()
		1043	PROTOTYPE:
		1044	CODE:
		1045	if (nreqs)
		1046	{
		1047	poll_wait ();
		1048	poll_cb ();
		1049	}
490		1050
491	int	1051	int
492	poll_fileno()	1052	poll_fileno()
493	PROTOTYPE:	1053	PROTOTYPE:
494	CODE:	1054	CODE:
495	RETVAL = respipe[0];	1055	RETVAL = respipe [0];
496	OUTPUT:	1056	OUTPUT:
497	RETVAL	1057	RETVAL
498		1058
499	int	1059	int
500	poll_cb(...)	1060	poll_cb(...)
501	PROTOTYPE:	1061	PROTOTYPE:
502	CODE:	1062	CODE:
503	RETVAL = poll_cb (aTHX);	1063	RETVAL = poll_cb ();
504	OUTPUT:	1064	OUTPUT:
505	RETVAL	1065	RETVAL
506		1066
507	void	1067	void
508	poll_wait()	1068	poll_wait()
509	PROTOTYPE:	1069	PROTOTYPE:
510	CODE:	1070	CODE:
		1071	if (nreqs)
511	poll_wait ();	1072	poll_wait ();
512		1073
513	int	1074	int
514	nreqs()	1075	nreqs()
515	PROTOTYPE:	1076	PROTOTYPE:
516	CODE:	1077	CODE:

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.1 by root, Sun Jul 10 17:07:44 2005 UTC vs. Revision 1.40 by root, Sat Jun 24 16:27:02 2006 UTC

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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.1 by root, Sun Jul 10 17:07:44 2005 UTC vs.
Revision 1.40 by root, Sat Jun 24 16:27:02 2006 UTC