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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.53 by root, Mon Oct 23 00:17:07 2006 UTC vs.
Revision 1.137 by root, Sun Apr 19 13:19:57 2009 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"
9
10	#include <pthread.h>
11
12	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
13	#include <errno.h>	11	#include <errno.h>
14	#include <sys/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	12	#include <sys/types.h>
17	#include <sys/stat.h>	13	#include <sys/stat.h>
18	#include <limits.h>	14	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	15	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	16	#include <sched.h>
23		17
24	#if HAVE_SENDFILE	18	/* perl namespace pollution */
25	# if __linux	19	#undef VERSION
26	# include <sys/sendfile.h>	20
27	# elif __freebsd	21	#ifdef _WIN32
28	# include <sys/socket.h>	22
29	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
30	# elif __hpux	24	# undef malloc
31	# include <sys/socket.h>	25	# undef free
32	# elif __solaris /* not yet */	26
33	# include <sys/sendfile.h>	27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
34	# else	59	#else
35	# error sendfile support requested but not available	60
36	# endif	61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
37	#endif	68	#endif
38		69
39	/* used for struct dirent, AIX doesn't provide it */	70	/* perl stupidly overrides readdir and maybe others */
40	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
41	# define NAME_MAX 4096	72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
		81	#else
		82	# define SvVAL64 SvNV
42	#endif	83	#endif
43		84
44	#if __ia64	85	/*****************************************************************************/
45	# define STACKSIZE 65536	86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
46	#else	89	#else
47	# define STACKSIZE 8192	90	# define expect(expr,value) (expr)
48	#endif	91	#endif
49		92
50	enum {	93	#define expect_false(expr) expect ((expr) != 0, 0)
51	REQ_QUIT,	94	#define expect_true(expr) expect ((expr) != 0, 1)
52	REQ_OPEN, REQ_CLOSE,	95
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	96	/*****************************************************************************/
54	REQ_SENDFILE,	97
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	98	static HV *stash;
56	REQ_FSYNC, REQ_FDATASYNC,	99	typedef SV SV8; /* byte-sv, used for argument-checking */
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,
61	REQ_GROUP,
62	};
63		100
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	101	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	102	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		103
67	typedef struct aio_cb	104	#define EIO_REQ_MEMBERS \
68	{
69	struct aio_cb *volatile next;
70
71	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72
73	SV *self; /* the perl counterpart of this request, if any */
74
75	SV *data, *callback;	105	SV *callback; \
76	SV *fh, *fh2;	106	SV *sv1, *sv2; \
77	void *dataptr, *data2ptr;
78	Stat_t *statdata;
79	off_t offset;
80	size_t length;
81	ssize_t result;
82
83	int type;
84	int fd, fd2;
85	int errorno;
86	STRLEN dataoffset;	107	STRLEN stroffset; \
87	mode_t mode; /* open */	108	SV *self;
88	unsigned char cancelled;
89	} aio_cb;
90		109
		110	#define EIO_NO_WRAPPERS 1
		111
		112	#include "libeio/eio.h"
		113
		114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void req_destroy (eio_req *grp);
		117	#define EIO_DESTROY(req) req_destroy (req)
		118
		119	enum {
		120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		121	};
		122
		123	#include "libeio/eio.c"
		124
91	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
92	typedef aio_cb *aio_req_ornot;	126	typedef eio_req *aio_req_ornot;
93		127
94	static int started, wanted;	128	static SV *on_next_submit;
95	static volatile int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
96	static int max_outstanding = 1<<30;	130	static int max_outstanding;
97	static int respipe [2];
98		131
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		133
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
104	static volatile aio_req ress, rese; /* queue start, queue end */
105
106	static void req_invoke (aio_req req);	135	static void req_cancel (aio_req req);
107	static void req_free (aio_req req);	136
		137	static void want_poll (void)
		138	{
		139	/* write a dummy byte to the pipe so fh becomes ready */
		140	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		141	}
		142
		143	static void done_poll (void)
		144	{
		145	/* read any signals sent by the worker threads */
		146	char buf [4];
		147	while (respipe_read (respipe [0], buf, 4) == 4)
		148	;
		149	}
108		150
109	/* must be called at most once */	151	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	152	static SV *req_sv (aio_req req, const char *klass)
111	{	153	{
112	if (!req->self)	154	if (!req->self)
…		…
130	return mg ? (aio_req)mg->mg_ptr : 0;	172	return mg ? (aio_req)mg->mg_ptr : 0;
131	}	173	}
132		174
133	static void aio_grp_feed (aio_req grp)	175	static void aio_grp_feed (aio_req grp)
134	{	176	{
135	while (grp->length < grp->fd2)	177	if (grp->sv2 && SvOK (grp->sv2))
136	{	178	{
137	int old_len = grp->length;	179	dSP;
138		180
139	if (grp->fh2 && SvOK (grp->fh2))	181	ENTER;
		182	SAVETMPS;
		183	PUSHMARK (SP);
		184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		185	PUTBACK;
		186	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		187	SPAGAIN;
		188	FREETMPS;
		189	LEAVE;
		190	}
		191	}
		192
		193	static void req_submit (eio_req *req)
		194	{
		195	eio_submit (req);
		196
		197	if (expect_false (on_next_submit))
		198	{
		199	dSP;
		200	SV *cb = sv_2mortal (on_next_submit);
		201
		202	on_next_submit = 0;
		203
		204	PUSHMARK (SP);
		205	PUTBACK;
		206	call_sv (cb, G_DISCARD | G_EVAL);
		207	}
		208	}
		209
		210	static int req_invoke (eio_req *req)
		211	{
		212	dSP;
		213
		214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
		216
		217	if (!EIO_CANCELLED (req) && req->callback)
		218	{
		219	ENTER;
		220	SAVETMPS;
		221	PUSHMARK (SP);
		222	EXTEND (SP, 1);
		223
		224	switch (req->type)
140	{	225	{
141	dSP;	226	case EIO_READDIR:
		227	{
		228	SV *rv = &PL_sv_undef;
142		229
143	ENTER;	230	if (req->result >= 0)
144	SAVETMPS;	231	{
145	PUSHMARK (SP);	232	int i;
146	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	233	char *buf = req->ptr2;
147	PUTBACK;	234	AV *av = newAV ();
148	call_sv (grp->fh2, G_VOID | G_EVAL);	235
149	SPAGAIN;	236	av_extend (av, req->result - 1);
150	FREETMPS;	237
151	LEAVE;	238	for (i = 0; i < req->result; ++i)
		239	{
		240	SV *sv = newSVpv (buf, 0);
		241
		242	av_store (av, i, sv);
		243	buf += SvCUR (sv) + 1;
		244	}
		245
		246	rv = sv_2mortal (newRV_noinc ((SV *)av));
		247	}
		248
		249	PUSHs (rv);
		250	}
		251	break;
		252
		253	case EIO_OPEN:
		254	{
		255	/* convert fd to fh */
		256	SV *fh = &PL_sv_undef;
		257
		258	if (req->result >= 0)
		259	{
		260	GV *gv = (GV *)sv_newmortal ();
		261	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		262	char sym [64];
		263	int symlen;
		264
		265	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		266	gv_init (gv, stash, sym, symlen, 0);
		267
		268	symlen = snprintf (
		269	sym,
		270	sizeof (sym),
		271	"%s&=%d",
		272	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		273	req->result
		274	);
		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
		280	PUSHs (fh);
		281	}
		282	break;
		283
		284	case EIO_GROUP:
		285	req->int1 = 2; /* mark group as finished */
		286
		287	if (req->sv1)
		288	{
		289	int i;
		290	AV *av = (AV *)req->sv1;
		291
		292	EXTEND (SP, AvFILL (av) + 1);
		293	for (i = 0; i <= AvFILL (av); ++i)
		294	PUSHs (*av_fetch (av, i, 0));
		295	}
		296	break;
		297
		298	case EIO_NOP:
		299	case EIO_BUSY:
		300	break;
		301
		302	case EIO_READLINK:
		303	if (req->result > 0)
		304	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		305	break;
		306
		307	case EIO_STAT:
		308	case EIO_LSTAT:
		309	case EIO_FSTAT:
		310	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		311	PL_laststatval = req->result;
		312	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		313	PUSHs (sv_2mortal (newSViv (req->result)));
		314	break;
		315
		316	case EIO_READ:
		317	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		318	*SvEND (req->sv2) = 0;
		319	PUSHs (sv_2mortal (newSViv (req->result)));
		320	break;
		321
		322	case EIO_DUP2:
		323	if (req->result > 0)
		324	req->result = 0;
		325	/* FALLTHROUGH */
		326
		327	default:
		328	PUSHs (sv_2mortal (newSViv (req->result)));
		329	break;
152	}	330	}
153		331
154	/* stop if no progress has been made */	332	errno = req->errorno;
155	if (old_len == grp->length)	333
156	{	334	PUTBACK;
157	SvREFCNT_dec (grp->fh2);	335	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
158	grp->fh2 = 0;	336	SPAGAIN;
159	break;	337
160	}	338	FREETMPS;
		339	LEAVE;
		340
		341	PUTBACK;
161	}	342	}
162	}
163		343
164	static void aio_grp_dec (aio_req grp)	344	return !!SvTRUE (ERRSV);
165	{
166	--grp->length;
167
168	/* call feeder, if applicable */
169	aio_grp_feed (grp);
170
171	/* finish, if done */
172	if (!grp->length && grp->fd)
173	{
174	req_invoke (grp);
175	req_free (grp);
176	}
177	}	345	}
178		346
179	static void poll_wait ()
180	{
181	if (nreqs && !ress)
182	{
183	fd_set rfd;
184	FD_ZERO(&rfd);
185	FD_SET(respipe [0], &rfd);
186
187	select (respipe [0] + 1, &rfd, 0, 0, 0);
188	}
189	}
190
191	static void req_invoke (aio_req req)
192	{
193	dSP;
194	int errorno = errno;
195
196	if (req->cancelled || !SvOK (req->callback))
197	return;
198
199	errno = req->errorno;
200
201	ENTER;
202	SAVETMPS;
203	PUSHMARK (SP);
204	EXTEND (SP, 1);
205
206	switch (req->type)
207	{
208	case REQ_READDIR:
209	{
210	SV *rv = &PL_sv_undef;
211
212	if (req->result >= 0)
213	{
214	char *buf = req->data2ptr;
215	AV *av = newAV ();
216
217	while (req->result)
218	{
219	SV *sv = newSVpv (buf, 0);
220
221	av_push (av, sv);
222	buf += SvCUR (sv) + 1;
223	req->result--;
224	}
225
226	rv = sv_2mortal (newRV_noinc ((SV *)av));
227	}
228
229	PUSHs (rv);
230	}
231	break;
232
233	case REQ_OPEN:
234	{
235	/* convert fd to fh */
236	SV *fh;
237
238	PUSHs (sv_2mortal (newSViv (req->result)));
239	PUTBACK;
240	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
241	SPAGAIN;
242
243	fh = SvREFCNT_inc (POPs);
244
245	PUSHMARK (SP);
246	XPUSHs (sv_2mortal (fh));
247	}
248	break;
249
250	case REQ_GROUP:
251	req->fd = 2; /* mark group as finished */
252
253	if (req->data)
254	{
255	int i;
256	AV *av = (AV *)req->data;
257
258	EXTEND (SP, AvFILL (av) + 1);
259	for (i = 0; i <= AvFILL (av); ++i)
260	PUSHs (*av_fetch (av, i, 0));
261	}
262	break;
263
264	case REQ_SLEEP:
265	break;
266
267	default:
268	PUSHs (sv_2mortal (newSViv (req->result)));
269	break;
270	}
271
272
273	PUTBACK;
274	call_sv (req->callback, G_VOID | G_EVAL);
275	SPAGAIN;
276
277	FREETMPS;
278	LEAVE;
279
280	errno = errorno;
281
282	if (SvTRUE (ERRSV))
283	{
284	req_free (req);
285	croak (0);
286	}
287	}
288
289	static void req_free (aio_req req)	347	static void req_destroy (aio_req req)
290	{	348	{
291	if (req->grp)
292	{
293	aio_req grp = req->grp;
294
295	/* unlink request */
296	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
297	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
298
299	if (grp->grp_first == req)
300	grp->grp_first = req->grp_next;
301
302	aio_grp_dec (grp);
303	}
304
305	if (req->self)	349	if (req->self)
306	{	350	{
307	sv_unmagic (req->self, PERL_MAGIC_ext);	351	sv_unmagic (req->self, PERL_MAGIC_ext);
308	SvREFCNT_dec (req->self);	352	SvREFCNT_dec (req->self);
309	}	353	}
310		354
311	SvREFCNT_dec (req->data);
312	SvREFCNT_dec (req->fh);	355	SvREFCNT_dec (req->sv1);
313	SvREFCNT_dec (req->fh2);	356	SvREFCNT_dec (req->sv2);
314	SvREFCNT_dec (req->callback);	357	SvREFCNT_dec (req->callback);
315	Safefree (req->statdata);
316
317	if (req->type == REQ_READDIR && req->result >= 0)
318	free (req->data2ptr);
319		358
320	Safefree (req);	359	Safefree (req);
321	}	360	}
322		361
323	static void req_cancel (aio_req req)	362	static void req_cancel_subs (aio_req grp)
324	{	363	{
325	req->cancelled = 1;	364	aio_req sub;
326		365
327	if (req->type == REQ_GROUP)	366	if (grp->type != EIO_GROUP)
		367	return;
		368
		369	SvREFCNT_dec (grp->sv2);
		370	grp->sv2 = 0;
		371
		372	eio_grp_cancel (grp);
		373	}
		374
		375	#ifdef USE_SOCKETS_AS_HANDLES
		376	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		377	#else
		378	# define TO_SOCKET(x) (x)
		379	#endif
		380
		381	static void
		382	create_respipe (void)
		383	{
		384	int old_readfd = respipe [0];
		385
		386	if (respipe [1] >= 0)
		387	respipe_close (TO_SOCKET (respipe [1]));
		388
		389	#ifdef _WIN32
		390	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		391	#else
		392	if (pipe (respipe))
		393	#endif
		394	croak ("unable to initialize result pipe");
		395
		396	if (old_readfd >= 0)
328	{	397	{
329	aio_req sub;	398	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		399	croak ("unable to initialize result pipe(2)");
330		400
331	for (sub = req->grp_first; sub; sub = sub->grp_next)	401	respipe_close (respipe [0]);
332	req_cancel (sub);	402	respipe [0] = old_readfd;
333	}	403	}
334	}
335		404
		405	#ifdef _WIN32
		406	int arg = 1;
		407	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		408	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		409	#else
		410	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		411	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		412	#endif
		413	croak ("unable to initialize result pipe(3)");
		414
		415	respipe_osf [0] = TO_SOCKET (respipe [0]);
		416	respipe_osf [1] = TO_SOCKET (respipe [1]);
		417	}
		418
		419	static void poll_wait (void)
		420	{
		421	fd_set rfd;
		422
		423	while (eio_nreqs ())
		424	{
		425	int size;
		426
		427	X_LOCK (reslock);
		428	size = res_queue.size;
		429	X_UNLOCK (reslock);
		430
		431	if (size)
		432	return;
		433
		434	etp_maybe_start_thread ();
		435
		436	FD_ZERO (&rfd);
		437	FD_SET (respipe [0], &rfd);
		438
		439	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		440	}
		441	}
		442
336	static int poll_cb ()	443	static int poll_cb (void)
337	{	444	{
338	dSP;
339	int count = 0;
340	int do_croak = 0;
341	aio_req req;
342
343	for (;;)	445	for (;;)
344	{	446	{
345	pthread_mutex_lock (&reslock);	447	int res = eio_poll ();
346	req = ress;
347		448
348	if (req)	449	if (res > 0)
349	{
350	ress = req->next;
351
352	if (!ress)
353	{
354	/* read any signals sent by the worker threads */
355	char buf [32];
356	while (read (respipe [0], buf, 32) == 32)
357	;
358
359	rese = 0;
360	}
361	}
362
363	pthread_mutex_unlock (&reslock);
364
365	if (!req)
366	break;	450	croak (0);
367		451
368	--nreqs;	452	if (!max_outstanding || max_outstanding > eio_nreqs ())
		453	return res;
369		454
370	if (req->type == REQ_QUIT)	455	poll_wait ();
371	started--;
372	else if (req->type == REQ_GROUP && req->length)
373	{
374	req->fd = 1; /* mark request as delayed */
375	continue;
376	}
377	else
378	{
379	if (req->type == REQ_READ)
380	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
381
382	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
383	SvREADONLY_off (req->data);
384
385	if (req->statdata)
386	{
387	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
388	PL_laststatval = req->result;
389	PL_statcache = *(req->statdata);
390	}
391
392	req_invoke (req);
393
394	count++;
395	}
396
397	req_free (req);
398	}	456	}
399
400	return count;
401	}	457	}
402		458
403	static void *aio_proc(void *arg);
404
405	static void start_thread (void)	459	static void atfork_child (void)
406	{	460	{
407	sigset_t fullsigset, oldsigset;	461	create_respipe ();
408	pthread_t tid;
409	pthread_attr_t attr;
410
411	pthread_attr_init (&attr);
412	pthread_attr_setstacksize (&attr, STACKSIZE);
413	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
414
415	sigfillset (&fullsigset);
416	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
417
418	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
419	started++;
420
421	sigprocmask (SIG_SETMASK, &oldsigset, 0);
422	}	462	}
423		463
424	static void req_send (aio_req req)	464	static SV *
		465	get_cb (SV *cb_sv)
425	{	466	{
426	while (started < wanted && nreqs >= started)	467	HV *st;
427	start_thread ();	468	GV *gvp;
		469	CV *cv;
428		470
429	++nreqs;	471	if (!SvOK (cb_sv))
430
431	pthread_mutex_lock (&reqlock);
432
433	req->next = 0;
434
435	if (reqe)
436	{
437	reqe->next = req;
438	reqe = req;
439	}
440	else
441	reqe = reqs = req;
442
443	pthread_cond_signal (&reqwait);
444	pthread_mutex_unlock (&reqlock);
445
446	if (nreqs > max_outstanding)
447	for (;;)
448	{
449	poll_cb ();
450
451	if (nreqs <= max_outstanding)
452	break;
453
454	poll_wait ();
455	}
456	}
457
458	static void end_thread (void)
459	{
460	aio_req req;
461	Newz (0, req, 1, aio_cb);
462	req->type = REQ_QUIT;
463
464	req_send (req);
465	}
466
467	static void min_parallel (int nthreads)
468	{
469	if (wanted < nthreads)
470	wanted = nthreads;
471	}
472
473	static void max_parallel (int nthreads)
474	{
475	int cur = started;
476
477	if (wanted > nthreads)
478	wanted = nthreads;
479
480	while (cur > wanted)
481	{
482	end_thread ();
483	cur--;
484	}
485
486	while (started > wanted)
487	{
488	poll_wait ();
489	poll_cb ();
490	}
491	}
492
493	static void create_pipe ()
494	{
495	if (pipe (respipe))
496	croak ("unable to initialize result pipe");
497
498	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
499	croak ("cannot set result pipe to nonblocking mode");
500
501	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
502	croak ("cannot set result pipe to nonblocking mode");
503	}
504
505	/*****************************************************************************/
506	/* work around various missing functions */
507
508	#if !HAVE_PREADWRITE
509	# define pread aio_pread
510	# define pwrite aio_pwrite
511
512	/*
513	* make our pread/pwrite safe against themselves, but not against
514	* normal read/write by using a mutex. slows down execution a lot,
515	* but that's your problem, not mine.
516	*/
517	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
518
519	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
520	{
521	ssize_t res;
522	off_t ooffset;
523
524	pthread_mutex_lock (&preadwritelock);
525	ooffset = lseek (fd, 0, SEEK_CUR);
526	lseek (fd, offset, SEEK_SET);
527	res = read (fd, buf, count);
528	lseek (fd, ooffset, SEEK_SET);
529	pthread_mutex_unlock (&preadwritelock);
530
531	return res;
532	}
533
534	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
535	{
536	ssize_t res;
537	off_t ooffset;
538
539	pthread_mutex_lock (&preadwritelock);
540	ooffset = lseek (fd, 0, SEEK_CUR);
541	lseek (fd, offset, SEEK_SET);
542	res = write (fd, buf, count);
543	lseek (fd, offset, SEEK_SET);
544	pthread_mutex_unlock (&preadwritelock);
545
546	return res;
547	}
548	#endif
549
550	#if !HAVE_FDATASYNC
551	# define fdatasync fsync
552	#endif
553
554	#if !HAVE_READAHEAD
555	# define readahead aio_readahead
556
557	static ssize_t readahead (int fd, off_t offset, size_t count)
558	{
559	char readahead_buf[4096];
560
561	while (count > 0)
562	{
563	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
564
565	pread (fd, readahead_buf, len, offset);
566	offset += len;
567	count -= len;
568	}
569
570	errno = 0;
571	}
572	#endif
573
574	#if !HAVE_READDIR_R
575	# define readdir_r aio_readdir_r
576
577	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
578
579	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
580	{
581	struct dirent *e;
582	int errorno;
583
584	pthread_mutex_lock (&readdirlock);
585
586	e = readdir (dirp);
587	errorno = errno;
588
589	if (e)
590	{
591	*res = ent;
592	strcpy (ent->d_name, e->d_name);
593	}
594	else
595	*res = 0;
596
597	pthread_mutex_unlock (&readdirlock);
598
599	errno = errorno;
600	return e ? 0 : -1;
601	}
602	#endif
603
604	/* sendfile always needs emulation */
605	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
606	{
607	ssize_t res;
608
609	if (!count)
610	return 0;	472	return 0;
611		473
612	#if HAVE_SENDFILE	474	cv = sv_2cv (cb_sv, &st, &gvp, 0);
613	# if __linux
614	res = sendfile (ofd, ifd, &offset, count);
615		475
616	# elif __freebsd	476	if (!cv)
617	/*	477	croak ("IO::AIO callback must be undef or a CODE reference");
618	* Of course, the freebsd sendfile is a dire hack with no thoughts
619	* wasted on making it similar to other I/O functions.
620	*/
621	{
622	off_t sbytes;
623	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
624		478
625	if (res < 0 && sbytes)	479	return (SV *)cv;
626	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
627	res = sbytes;
628	}
629
630	# elif __hpux
631	res = sendfile (ofd, ifd, offset, count, 0, 0);
632
633	# elif __solaris
634	{
635	struct sendfilevec vec;
636	size_t sbytes;
637
638	vec.sfv_fd = ifd;
639	vec.sfv_flag = 0;
640	vec.sfv_off = offset;
641	vec.sfv_len = count;
642
643	res = sendfilev (ofd, &vec, 1, &sbytes);
644
645	if (res < 0 && sbytes)
646	res = sbytes;
647	}
648
649	# endif
650	#else
651	res = -1;
652	errno = ENOSYS;
653	#endif
654
655	if (res < 0
656	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
657	#if __solaris
658	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
659	#endif
660	)
661	)
662	{
663	/* emulate sendfile. this is a major pain in the ass */
664	char buf[4096];
665	res = 0;
666
667	while (count)
668	{
669	ssize_t cnt;
670
671	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
672
673	if (cnt <= 0)
674	{
675	if (cnt && !res) res = -1;
676	break;
677	}
678
679	cnt = write (ofd, buf, cnt);
680
681	if (cnt <= 0)
682	{
683	if (cnt && !res) res = -1;
684	break;
685	}
686
687	offset += cnt;
688	res += cnt;
689	count -= cnt;
690	}
691	}
692
693	return res;
694	}
695
696	/* read a full directory */
697	static int scandir_ (const char *path, void **namesp)
698	{
699	DIR *dirp = opendir (path);
700	union
701	{
702	struct dirent d;
703	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
704	} u;
705	struct dirent *entp;
706	char *name, *names;
707	int memlen = 4096;
708	int memofs = 0;
709	int res = 0;
710	int errorno;
711
712	if (!dirp)
713	return -1;
714
715	names = malloc (memlen);
716
717	for (;;)
718	{
719	errno = 0, readdir_r (dirp, &u.d, &entp);
720
721	if (!entp)
722	break;
723
724	name = entp->d_name;
725
726	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
727	{
728	int len = strlen (name) + 1;
729
730	res++;
731
732	while (memofs + len > memlen)
733	{
734	memlen *= 2;
735	names = realloc (names, memlen);
736	if (!names)
737	break;
738	}
739
740	memcpy (names + memofs, name, len);
741	memofs += len;
742	}
743	}
744
745	errorno = errno;
746	closedir (dirp);
747
748	if (errorno)
749	{
750	free (names);
751	errno = errorno;
752	res = -1;
753	}
754
755	*namesp = (void *)names;
756	return res;
757	}
758
759	/*****************************************************************************/
760
761	static void *aio_proc (void *thr_arg)
762	{
763	aio_req req;
764	int type;
765
766	do
767	{
768	pthread_mutex_lock (&reqlock);
769
770	for (;;)
771	{
772	req = reqs;
773
774	if (reqs)
775	{
776	reqs = reqs->next;
777	if (!reqs) reqe = 0;
778	}
779
780	if (req)
781	break;
782
783	pthread_cond_wait (&reqwait, &reqlock);
784	}
785
786	pthread_mutex_unlock (&reqlock);
787
788	errno = 0; /* strictly unnecessary */
789
790	if (!req->cancelled)
791	switch (type = req->type) /* remember type for QUIT check */
792	{
793	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
794	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
795
796	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
797	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
798
799	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
800	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
801	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
802
803	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
804	case REQ_CLOSE: req->result = close (req->fd); break;
805	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
806	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
807	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
808	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
809	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
810
811	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
812	case REQ_FSYNC: req->result = fsync (req->fd); break;
813	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
814
815	case REQ_SLEEP:
816	{
817	struct timeval tv;
818
819	tv.tv_sec = req->fd;
820	tv.tv_usec = req->fd2;
821
822	req->result = select (0, 0, 0, 0, &tv);
823	}
824
825	case REQ_QUIT:
826	break;
827
828	default:
829	req->result = ENOSYS;
830	break;
831	}
832
833	req->errorno = errno;
834
835	pthread_mutex_lock (&reslock);
836
837	req->next = 0;
838
839	if (rese)
840	{
841	rese->next = req;
842	rese = req;
843	}
844	else
845	{
846	rese = ress = req;
847
848	/* write a dummy byte to the pipe so fh becomes ready */
849	write (respipe [1], &respipe, 1);
850	}
851
852	pthread_mutex_unlock (&reslock);
853	}
854	while (type != REQ_QUIT);
855
856	return 0;
857	}
858
859	/*****************************************************************************/
860
861	static void atfork_prepare (void)
862	{
863	pthread_mutex_lock (&reqlock);
864	pthread_mutex_lock (&reslock);
865	#if !HAVE_PREADWRITE
866	pthread_mutex_lock (&preadwritelock);
867	#endif
868	#if !HAVE_READDIR_R
869	pthread_mutex_lock (&readdirlock);
870	#endif
871	}
872
873	static void atfork_parent (void)
874	{
875	#if !HAVE_READDIR_R
876	pthread_mutex_unlock (&readdirlock);
877	#endif
878	#if !HAVE_PREADWRITE
879	pthread_mutex_unlock (&preadwritelock);
880	#endif
881	pthread_mutex_unlock (&reslock);
882	pthread_mutex_unlock (&reqlock);
883	}
884
885	static void atfork_child (void)
886	{
887	aio_req prv;
888
889	started = 0;
890
891	while (reqs)
892	{
893	prv = reqs;
894	reqs = prv->next;
895	req_free (prv);
896	}
897
898	reqs = reqe = 0;
899
900	while (ress)
901	{
902	prv = ress;
903	ress = prv->next;
904	req_free (prv);
905	}
906
907	ress = rese = 0;
908
909	close (respipe [0]);
910	close (respipe [1]);
911	create_pipe ();
912
913	atfork_parent ();
914	}	480	}
915		481
916	#define dREQ \	482	#define dREQ \
		483	SV *cb_cv; \
917	aio_req req; \	484	aio_req req; \
		485	int req_pri = next_pri; \
		486	next_pri = EIO_PRI_DEFAULT; \
918	\	487	\
919	if (SvOK (callback) && !SvROK (callback)) \	488	cb_cv = get_cb (callback); \
920	croak ("callback must be undef or of reference type"); \
921	\	489	\
922	Newz (0, req, 1, aio_cb); \	490	Newz (0, req, 1, eio_req); \
923	if (!req) \	491	if (!req) \
924	croak ("out of memory during aio_req allocation"); \	492	croak ("out of memory during eio_req allocation"); \
925	\	493	\
926	req->callback = newSVsv (callback)	494	req->callback = SvREFCNT_inc (cb_cv); \
		495	req->pri = req_pri
927		496
928	#define REQ_SEND \	497	#define REQ_SEND \
		498	PUTBACK; \
929	req_send (req); \	499	req_submit (req); \
		500	SPAGAIN; \
930	\	501	\
931	if (GIMME_V != G_VOID) \	502	if (GIMME_V != G_VOID) \
932	XPUSHs (req_sv (req, AIO_REQ_KLASS));	503	XPUSHs (req_sv (req, AIO_REQ_KLASS));
933		504
		505	static int
		506	extract_fd (SV *fh, int wr)
		507	{
		508	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		509
		510	if (fd < 0)
		511	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		512
		513	return fd;
		514	}
		515
934	MODULE = IO::AIO PACKAGE = IO::AIO	516	MODULE = IO::AIO PACKAGE = IO::AIO
935		517
936	PROTOTYPES: ENABLE	518	PROTOTYPES: ENABLE
937		519
938	BOOT:	520	BOOT:
939	{	521	{
940	HV *stash = gv_stashpv ("IO::AIO", 1);	522	stash = gv_stashpv ("IO::AIO", 1);
		523
941	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	524	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
942	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	525	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
943	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	526	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		527	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		528	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		529	#ifndef _WIN32
		530	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		531	#endif
		532	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		533	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		534	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		535	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
944		536
945	create_pipe ();	537	create_respipe ();
946	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
947	}
948		538
		539	if (eio_init (want_poll, done_poll) < 0)
		540	croak ("IO::AIO: unable to initialise eio library");
		541
		542	/* atfork child called in fifo order, so before eio's handler */
		543	X_THREAD_ATFORK (0, 0, atfork_child);
		544	}
		545
949	void	546	void
950	min_parallel (nthreads)	547	max_poll_reqs (int nreqs)
951	int nthreads
952	PROTOTYPE: $	548	PROTOTYPE: $
		549	CODE:
		550	eio_set_max_poll_reqs (nreqs);
953		551
954	void	552	void
955	max_parallel (nthreads)	553	max_poll_time (double nseconds)
956	int nthreads
957	PROTOTYPE: $	554	PROTOTYPE: $
958
959	int
960	max_outstanding (nreqs)
961	int nreqs
962	PROTOTYPE: $
963	CODE:	555	CODE:
964	RETVAL = max_outstanding;	556	eio_set_max_poll_time (nseconds);
		557
		558	void
		559	min_parallel (int nthreads)
		560	PROTOTYPE: $
		561	CODE:
		562	eio_set_min_parallel (nthreads);
		563
		564	void
		565	max_parallel (int nthreads)
		566	PROTOTYPE: $
		567	CODE:
		568	eio_set_max_parallel (nthreads);
		569
		570	void
		571	max_idle (int nthreads)
		572	PROTOTYPE: $
		573	CODE:
		574	eio_set_max_idle (nthreads);
		575
		576	void
		577	max_outstanding (int maxreqs)
		578	PROTOTYPE: $
		579	CODE:
965	max_outstanding = nreqs;	580	max_outstanding = maxreqs;
966		581
967	void	582	void
968	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	583	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
969	SV * pathname
970	int flags
971	int mode
972	SV * callback
973	PROTOTYPE: $$$;$	584	PROTOTYPE: $$$;$
974	PPCODE:	585	PPCODE:
975	{	586	{
976	dREQ;	587	dREQ;
977		588
978	req->type = REQ_OPEN;	589	req->type = EIO_OPEN;
979	req->data = newSVsv (pathname);	590	req->sv1 = newSVsv (pathname);
980	req->dataptr = SvPVbyte_nolen (req->data);	591	req->ptr1 = SvPVbyte_nolen (req->sv1);
981	req->fd = flags;	592	req->int1 = flags;
982	req->mode = mode;	593	req->int2 = mode;
983		594
984	REQ_SEND;	595	REQ_SEND;
985	}	596	}
986		597
987	void	598	void
988	aio_close (fh,callback=&PL_sv_undef)	599	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
989	SV * fh
990	SV * callback
991	PROTOTYPE: $;$	600	PROTOTYPE: $;$
992	ALIAS:	601	ALIAS:
993	aio_close = REQ_CLOSE
994	aio_fsync = REQ_FSYNC	602	aio_fsync = EIO_FSYNC
995	aio_fdatasync = REQ_FDATASYNC	603	aio_fdatasync = EIO_FDATASYNC
996	PPCODE:	604	PPCODE:
997	{	605	{
		606	int fd = extract_fd (fh, 0);
998	dREQ;	607	dREQ;
999		608
1000	req->type = ix;	609	req->type = ix;
1001	req->fh = newSVsv (fh);	610	req->sv1 = newSVsv (fh);
1002	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	611	req->int1 = fd;
1003		612
1004	REQ_SEND (req);	613	REQ_SEND (req);
1005	}	614	}
1006		615
1007	void	616	void
		617	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		618	PROTOTYPE: $$$$;$
		619	PPCODE:
		620	{
		621	int fd = extract_fd (fh, 0);
		622	dREQ;
		623
		624	req->type = EIO_SYNC_FILE_RANGE;
		625	req->sv1 = newSVsv (fh);
		626	req->int1 = fd;
		627	req->offs = SvVAL64 (offset);
		628	req->size = SvVAL64 (nbytes);
		629	req->int2 = flags;
		630
		631	REQ_SEND (req);
		632	}
		633
		634	void
		635	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		636	PROTOTYPE: $;$
		637	PPCODE:
		638	{
		639	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		640	int fd = extract_fd (fh, 0);
		641	dREQ;
		642
		643	if (close_pipe < 0)
		644	{
		645	int pipefd [2];
		646
		647	if (pipe (pipefd) < 0
		648	|| close (pipefd [1]) < 0
		649	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		650	abort (); /*D*/
		651
		652	close_pipe = pipefd [0];
		653	}
		654
		655	req->type = EIO_DUP2;
		656	req->int1 = close_pipe;
		657	req->sv2 = newSVsv (fh);
		658	req->int2 = fd;
		659
		660	REQ_SEND (req);
		661	}
		662
		663	void
1008	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	664	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1009	SV * fh
1010	UV offset
1011	UV length
1012	SV * data
1013	UV dataoffset
1014	SV * callback
1015	ALIAS:	665	ALIAS:
1016	aio_read = REQ_READ	666	aio_read = EIO_READ
1017	aio_write = REQ_WRITE	667	aio_write = EIO_WRITE
1018	PROTOTYPE: $$$$$;$	668	PROTOTYPE: $$$$$;$
1019	PPCODE:	669	PPCODE:
1020	{	670	{
1021	aio_req req;
1022	STRLEN svlen;	671	STRLEN svlen;
		672	int fd = extract_fd (fh, ix == EIO_WRITE);
1023	char *svptr = SvPVbyte (data, svlen);	673	char *svptr = SvPVbyte (data, svlen);
		674	UV len = SvUV (length);
		675
		676	if (SvTYPE (data) > SVt_PVMG || SvROK (data))
		677	croak ("illegal data argument '%s', must be plain scalar string", SvPV_nolen (data));
1024		678
1025	SvUPGRADE (data, SVt_PV);	679	SvUPGRADE (data, SVt_PV);
1026	SvPOK_on (data);	680	SvPOK_only (data);
1027		681
1028	if (dataoffset < 0)	682	if (dataoffset < 0)
1029	dataoffset += svlen;	683	dataoffset += svlen;
1030		684
1031	if (dataoffset < 0 || dataoffset > svlen)	685	if (dataoffset < 0 || dataoffset > svlen)
1032	croak ("data offset outside of string");	686	croak ("dataoffset outside of data scalar");
1033		687
1034	if (ix == REQ_WRITE)	688	if (ix == EIO_WRITE)
1035	{	689	{
1036	/* write: check length and adjust. */	690	/* write: check length and adjust. */
1037	if (length < 0 || length + dataoffset > svlen)	691	if (!SvOK (length) || len + dataoffset > svlen)
1038	length = svlen - dataoffset;	692	len = svlen - dataoffset;
1039	}	693	}
1040	else	694	else
1041	{	695	{
1042	/* read: grow scalar as necessary */	696	/* read: grow scalar as necessary */
1043	svptr = SvGROW (data, length + dataoffset);	697	svptr = SvGROW (data, len + dataoffset + 1);
1044	}	698	}
1045		699
1046	if (length < 0)	700	if (len < 0)
1047	croak ("length must not be negative");	701	croak ("length must not be negative");
1048		702
1049	{	703	{
1050	dREQ;	704	dREQ;
1051		705
1052	req->type = ix;	706	req->type = ix;
1053	req->fh = newSVsv (fh);	707	req->sv1 = newSVsv (fh);
1054	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	708	req->int1 = fd;
1055	: IoOFP (sv_2io (fh)));	709	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1056	req->offset = offset;	710	req->size = len;
1057	req->length = length;
1058	req->data = SvREFCNT_inc (data);	711	req->sv2 = SvREFCNT_inc (data);
1059	req->dataptr = (char *)svptr + dataoffset;	712	req->ptr2 = (char *)svptr + dataoffset;
		713	req->stroffset = dataoffset;
1060		714
1061	if (!SvREADONLY (data))	715	if (!SvREADONLY (data))
1062	{	716	{
1063	SvREADONLY_on (data);	717	SvREADONLY_on (data);
1064	req->data2ptr = (void *)data;	718	req->flags |= FLAG_SV2_RO_OFF;
1065	}	719	}
1066		720
1067	REQ_SEND;	721	REQ_SEND;
1068	}	722	}
1069	}	723	}
1070		724
1071	void	725	void
		726	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		727	PROTOTYPE: $$;$
		728	PPCODE:
		729	{
		730	SV *data;
		731	dREQ;
		732
		733	req->type = EIO_READLINK;
		734	req->sv1 = newSVsv (path);
		735	req->ptr1 = SvPVbyte_nolen (req->sv1);
		736
		737	REQ_SEND;
		738	}
		739
		740	void
1072	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	741	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1073	SV * out_fh
1074	SV * in_fh
1075	UV in_offset
1076	UV length
1077	SV * callback
1078	PROTOTYPE: $$$$;$	742	PROTOTYPE: $$$$;$
1079	PPCODE:	743	PPCODE:
1080	{	744	{
		745	int ifd = extract_fd (in_fh , 0);
		746	int ofd = extract_fd (out_fh, 0);
1081	dREQ;	747	dREQ;
1082		748
1083	req->type = REQ_SENDFILE;	749	req->type = EIO_SENDFILE;
1084	req->fh = newSVsv (out_fh);	750	req->sv1 = newSVsv (out_fh);
1085	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	751	req->int1 = ofd;
1086	req->fh2 = newSVsv (in_fh);	752	req->sv2 = newSVsv (in_fh);
1087	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	753	req->int2 = ifd;
1088	req->offset = in_offset;	754	req->offs = SvVAL64 (in_offset);
1089	req->length = length;	755	req->size = length;
1090		756
1091	REQ_SEND;	757	REQ_SEND;
1092	}	758	}
1093		759
1094	void	760	void
1095	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	761	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1096	SV * fh
1097	UV offset
1098	IV length
1099	SV * callback
1100	PROTOTYPE: $$$;$	762	PROTOTYPE: $$$;$
1101	PPCODE:	763	PPCODE:
1102	{	764	{
		765	int fd = extract_fd (fh, 0);
1103	dREQ;	766	dREQ;
1104		767
1105	req->type = REQ_READAHEAD;	768	req->type = EIO_READAHEAD;
1106	req->fh = newSVsv (fh);	769	req->sv1 = newSVsv (fh);
1107	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	770	req->int1 = fd;
1108	req->offset = offset;	771	req->offs = SvVAL64 (offset);
1109	req->length = length;	772	req->size = length;
1110		773
1111	REQ_SEND;	774	REQ_SEND;
1112	}	775	}
1113		776
1114	void	777	void
1115	aio_stat (fh_or_path,callback=&PL_sv_undef)	778	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1116	SV * fh_or_path
1117	SV * callback
1118	ALIAS:	779	ALIAS:
1119	aio_stat = REQ_STAT	780	aio_stat = EIO_STAT
1120	aio_lstat = REQ_LSTAT	781	aio_lstat = EIO_LSTAT
1121	PPCODE:	782	PPCODE:
1122	{	783	{
1123	dREQ;	784	dREQ;
1124		785
1125	New (0, req->statdata, 1, Stat_t);	786	req->sv1 = newSVsv (fh_or_path);
1126	if (!req->statdata)
1127	{
1128	req_free (req);
1129	croak ("out of memory during aio_req->statdata allocation");
1130	}
1131		787
1132	if (SvPOK (fh_or_path))	788	if (SvPOK (req->sv1))
1133	{	789	{
1134	req->type = ix;	790	req->type = ix;
1135	req->data = newSVsv (fh_or_path);
1136	req->dataptr = SvPVbyte_nolen (req->data);	791	req->ptr1 = SvPVbyte_nolen (req->sv1);
1137	}	792	}
1138	else	793	else
1139	{	794	{
1140	req->type = REQ_FSTAT;	795	req->type = EIO_FSTAT;
1141	req->fh = newSVsv (fh_or_path);
1142	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	796	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1143	}	797	}
1144		798
1145	REQ_SEND;	799	REQ_SEND;
1146	}	800	}
1147		801
1148	void	802	void
		803	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		804	PPCODE:
		805	{
		806	dREQ;
		807
		808	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		809	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		810	req->sv1 = newSVsv (fh_or_path);
		811
		812	if (SvPOK (req->sv1))
		813	{
		814	req->type = EIO_UTIME;
		815	req->ptr1 = SvPVbyte_nolen (req->sv1);
		816	}
		817	else
		818	{
		819	req->type = EIO_FUTIME;
		820	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		821	}
		822
		823	REQ_SEND;
		824	}
		825
		826	void
		827	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		828	PPCODE:
		829	{
		830	dREQ;
		831
		832	req->sv1 = newSVsv (fh_or_path);
		833	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		834
		835	if (SvPOK (req->sv1))
		836	{
		837	req->type = EIO_TRUNCATE;
		838	req->ptr1 = SvPVbyte_nolen (req->sv1);
		839	}
		840	else
		841	{
		842	req->type = EIO_FTRUNCATE;
		843	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		844	}
		845
		846	REQ_SEND;
		847	}
		848
		849	void
		850	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		851	ALIAS:
		852	aio_chmod = EIO_CHMOD
		853	aio_mkdir = EIO_MKDIR
		854	PPCODE:
		855	{
		856	dREQ;
		857
		858	req->int2 = mode;
		859	req->sv1 = newSVsv (fh_or_path);
		860
		861	if (SvPOK (req->sv1))
		862	{
		863	req->type = ix;
		864	req->ptr1 = SvPVbyte_nolen (req->sv1);
		865	}
		866	else
		867	{
		868	req->type = EIO_FCHMOD;
		869	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		870	}
		871
		872	REQ_SEND;
		873	}
		874
		875	void
		876	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		877	PPCODE:
		878	{
		879	dREQ;
		880
		881	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		882	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		883	req->sv1 = newSVsv (fh_or_path);
		884
		885	if (SvPOK (req->sv1))
		886	{
		887	req->type = EIO_CHOWN;
		888	req->ptr1 = SvPVbyte_nolen (req->sv1);
		889	}
		890	else
		891	{
		892	req->type = EIO_FCHOWN;
		893	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		894	}
		895
		896	REQ_SEND;
		897	}
		898
		899	void
1149	aio_unlink (pathname,callback=&PL_sv_undef)	900	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1150	SV * pathname
1151	SV * callback
1152	ALIAS:	901	ALIAS:
1153	aio_unlink = REQ_UNLINK	902	aio_unlink = EIO_UNLINK
1154	aio_rmdir = REQ_RMDIR	903	aio_rmdir = EIO_RMDIR
1155	aio_readdir = REQ_READDIR	904	aio_readdir = EIO_READDIR
1156	PPCODE:	905	PPCODE:
1157	{	906	{
1158	dREQ;	907	dREQ;
1159		908
1160	req->type = ix;	909	req->type = ix;
1161	req->data = newSVsv (pathname);	910	req->sv1 = newSVsv (pathname);
1162	req->dataptr = SvPVbyte_nolen (req->data);	911	req->ptr1 = SvPVbyte_nolen (req->sv1);
		912
		913	REQ_SEND;
		914	}
		915
		916	void
		917	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		918	ALIAS:
		919	aio_link = EIO_LINK
		920	aio_symlink = EIO_SYMLINK
		921	aio_rename = EIO_RENAME
		922	PPCODE:
		923	{
		924	dREQ;
		925
		926	req->type = ix;
		927	req->sv1 = newSVsv (oldpath);
		928	req->ptr1 = SvPVbyte_nolen (req->sv1);
		929	req->sv2 = newSVsv (newpath);
		930	req->ptr2 = SvPVbyte_nolen (req->sv2);
1163		931
1164	REQ_SEND;	932	REQ_SEND;
1165	}	933	}
1166		934
1167	void	935	void
1168	aio_link (oldpath,newpath,callback=&PL_sv_undef)	936	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1169	SV * oldpath
1170	SV * newpath
1171	SV * callback
1172	ALIAS:
1173	aio_link = REQ_LINK
1174	aio_symlink = REQ_SYMLINK
1175	aio_rename = REQ_RENAME
1176	PPCODE:	937	PPCODE:
1177	{	938	{
1178	dREQ;	939	dREQ;
1179		940
1180	req->type = ix;	941	req->type = EIO_MKNOD;
1181	req->fh = newSVsv (oldpath);	942	req->sv1 = newSVsv (pathname);
1182	req->data2ptr = SvPVbyte_nolen (req->fh);	943	req->ptr1 = SvPVbyte_nolen (req->sv1);
1183	req->data = newSVsv (newpath);	944	req->int2 = (mode_t)mode;
1184	req->dataptr = SvPVbyte_nolen (req->data);	945	req->offs = dev;
1185		946
1186	REQ_SEND;	947	REQ_SEND;
1187	}	948	}
1188		949
1189	void	950	void
1190	aio_sleep (delay,callback=&PL_sv_undef)	951	aio_busy (double delay, SV *callback=&PL_sv_undef)
1191	double delay
1192	SV * callback
1193	PPCODE:	952	PPCODE:
1194	{	953	{
1195	dREQ;	954	dREQ;
1196		955
1197	req->type = REQ_SLEEP;	956	req->type = EIO_BUSY;
1198	req->fd = delay < 0. ? 0 : delay;	957	req->nv1 = delay < 0. ? 0. : delay;
1199	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1200		958
1201	REQ_SEND;	959	REQ_SEND;
1202	}	960	}
1203		961
1204	void	962	void
1205	aio_group (callback=&PL_sv_undef)	963	aio_group (SV *callback=&PL_sv_undef)
1206	SV * callback
1207	PROTOTYPE: ;$	964	PROTOTYPE: ;$
1208	PPCODE:	965	PPCODE:
1209	{	966	{
1210	dREQ;	967	dREQ;
		968
1211	req->type = REQ_GROUP;	969	req->type = EIO_GROUP;
		970
1212	req_send (req);	971	req_submit (req);
1213	XPUSHs (req_sv (req, AIO_GRP_KLASS));	972	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1214	}	973	}
		974
		975	void
		976	aio_nop (SV *callback=&PL_sv_undef)
		977	ALIAS:
		978	aio_nop = EIO_NOP
		979	aio_sync = EIO_SYNC
		980	PPCODE:
		981	{
		982	dREQ;
		983
		984	req->type = ix;
		985
		986	REQ_SEND;
		987	}
		988
		989	int
		990	aioreq_pri (int pri = 0)
		991	PROTOTYPE: ;$
		992	CODE:
		993	RETVAL = next_pri;
		994	if (items > 0)
		995	{
		996	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		997	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		998	next_pri = pri;
		999	}
		1000	OUTPUT:
		1001	RETVAL
		1002
		1003	void
		1004	aioreq_nice (int nice = 0)
		1005	CODE:
		1006	nice = next_pri - nice;
		1007	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1008	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1009	next_pri = nice;
1215		1010
1216	void	1011	void
1217	flush ()	1012	flush ()
1218	PROTOTYPE:	1013	PROTOTYPE:
1219	CODE:	1014	CODE:
1220	while (nreqs)	1015	while (eio_nreqs ())
1221	{	1016	{
1222	poll_wait ();	1017	poll_wait ();
1223	poll_cb ();	1018	poll_cb ();
1224	}	1019	}
1225		1020
1226	void	1021	int
1227	poll()	1022	poll()
1228	PROTOTYPE:	1023	PROTOTYPE:
1229	CODE:	1024	CODE:
1230	if (nreqs)
1231	{
1232	poll_wait ();	1025	poll_wait ();
1233	poll_cb ();	1026	RETVAL = poll_cb ();
1234	}	1027	OUTPUT:
		1028	RETVAL
1235		1029
1236	int	1030	int
1237	poll_fileno()	1031	poll_fileno()
1238	PROTOTYPE:	1032	PROTOTYPE:
1239	CODE:	1033	CODE:
…		…
1251		1045
1252	void	1046	void
1253	poll_wait()	1047	poll_wait()
1254	PROTOTYPE:	1048	PROTOTYPE:
1255	CODE:	1049	CODE:
1256	if (nreqs)
1257	poll_wait ();	1050	poll_wait ();
1258		1051
1259	int	1052	int
1260	nreqs()	1053	nreqs()
1261	PROTOTYPE:	1054	PROTOTYPE:
1262	CODE:	1055	CODE:
1263	RETVAL = nreqs;	1056	RETVAL = eio_nreqs ();
1264	OUTPUT:	1057	OUTPUT:
1265	RETVAL	1058	RETVAL
1266		1059
		1060	int
		1061	nready()
		1062	PROTOTYPE:
		1063	CODE:
		1064	RETVAL = eio_nready ();
		1065	OUTPUT:
		1066	RETVAL
		1067
		1068	int
		1069	npending()
		1070	PROTOTYPE:
		1071	CODE:
		1072	RETVAL = eio_npending ();
		1073	OUTPUT:
		1074	RETVAL
		1075
		1076	int
		1077	nthreads()
		1078	PROTOTYPE:
		1079	CODE:
		1080	RETVAL = eio_nthreads ();
		1081	OUTPUT:
		1082	RETVAL
		1083
		1084	void _on_next_submit (SV *cb)
		1085	CODE:
		1086	SvREFCNT_dec (on_next_submit);
		1087	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1088
1267	PROTOTYPES: DISABLE	1089	PROTOTYPES: DISABLE
1268		1090
1269	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1091	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1270		1092
1271	void	1093	void
1272	cancel (aio_req_ornot req)	1094	cancel (aio_req_ornot req)
1273	PROTOTYPE:
1274	CODE:	1095	CODE:
1275	req_cancel (req);	1096	eio_cancel (req);
		1097
		1098	void
		1099	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1100	PPCODE:
		1101	{
		1102	if (GIMME_V != G_VOID)
		1103	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1104
		1105	if (items > 1)
		1106	{
		1107	SV *cb_cv = get_cb (callback);
		1108
		1109	SvREFCNT_dec (req->callback);
		1110	req->callback = SvREFCNT_inc (cb_cv);
		1111	}
		1112	}
1276		1113
1277	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1114	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1278		1115
1279	void	1116	void
1280	add (aio_req grp, ...)	1117	add (aio_req grp, ...)
1281	PPCODE:	1118	PPCODE:
1282	{	1119	{
1283	int i;	1120	int i;
1284	aio_req req;
1285		1121
1286	if (grp->fd == 2)	1122	if (grp->int1 == 2)
1287	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1123	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1288		1124
1289	for (i = 1; i < items; ++i )	1125	for (i = 1; i < items; ++i )
1290	{	1126	{
		1127	aio_req req;
		1128
1291	if (GIMME_V != G_VOID)	1129	if (GIMME_V != G_VOID)
1292	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1130	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1293		1131
1294	req = SvAIO_REQ (ST (i));	1132	req = SvAIO_REQ (ST (i));
1295		1133
1296	if (req)	1134	if (req)
1297	{	1135	eio_grp_add (grp, req);
1298	++grp->length;
1299	req->grp = grp;
1300
1301	req->grp_prev = 0;
1302	req->grp_next = grp->grp_first;
1303
1304	if (grp->grp_first)
1305	grp->grp_first->grp_prev = req;
1306
1307	grp->grp_first = req;
1308	}	1136	}
1309	}
1310	}	1137	}
		1138
		1139	void
		1140	cancel_subs (aio_req_ornot req)
		1141	CODE:
		1142	req_cancel_subs (req);
1311		1143
1312	void	1144	void
1313	result (aio_req grp, ...)	1145	result (aio_req grp, ...)
1314	CODE:	1146	CODE:
1315	{	1147	{
1316	int i;	1148	int i;
		1149	AV *av;
		1150
		1151	grp->errorno = errno;
		1152
1317	AV *av = newAV ();	1153	av = newAV ();
1318		1154
1319	for (i = 1; i < items; ++i )	1155	for (i = 1; i < items; ++i )
1320	av_push (av, newSVsv (ST (i)));	1156	av_push (av, newSVsv (ST (i)));
1321		1157
1322	SvREFCNT_dec (grp->data);	1158	SvREFCNT_dec (grp->sv1);
1323	grp->data = (SV *)av;	1159	grp->sv1 = (SV *)av;
1324	}	1160	}
1325		1161
1326	void	1162	void
1327	lock (aio_req grp)	1163	errno (aio_req grp, int errorno = errno)
1328	CODE:	1164	CODE:
1329	++grp->length;	1165	grp->errorno = errorno;
1330		1166
1331	void	1167	void
1332	unlock (aio_req grp)
1333	CODE:
1334	aio_grp_dec (grp);
1335
1336	void
1337	feeder_limit (aio_req grp, int limit)	1168	limit (aio_req grp, int limit)
1338	CODE:	1169	CODE:
1339	grp->fd2 = limit;	1170	eio_grp_limit (grp, limit);
1340	aio_grp_feed (grp);
1341		1171
1342	void	1172	void
1343	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)	1173	feed (aio_req grp, SV *callback=&PL_sv_undef)
1344	CODE:	1174	CODE:
1345	{	1175	{
1346	SvREFCNT_dec (grp->fh2);	1176	SvREFCNT_dec (grp->sv2);
1347	grp->fh2 = newSVsv (callback);	1177	grp->sv2 = newSVsv (callback);
		1178	grp->feed = aio_grp_feed;
1348		1179
1349	if (grp->fd2 <= 0)	1180	if (grp->int2 <= 0)
1350	grp->fd2 = 2;	1181	grp->int2 = 2;
1351		1182
1352	aio_grp_feed (grp);	1183	eio_grp_limit (grp, grp->int2);
1353	}	1184	}
1354		1185

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