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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 1.139 by root, Tue Apr 21 20:12:56 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	{
		318	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		319	*SvEND (req->sv2) = 0;
		320	SvPOK_only (req->sv2);
		321	SvSETMAGIC (req->sv2);
		322	PUSHs (sv_2mortal (newSViv (req->result)));
		323	}
		324	break;
		325
		326	case EIO_DUP2:
		327	if (req->result > 0)
		328	req->result = 0;
		329	/* FALLTHROUGH */
		330
		331	default:
		332	PUSHs (sv_2mortal (newSViv (req->result)));
		333	break;
152	}	334	}
153		335
154	/* stop if no progress has been made */	336	errno = req->errorno;
155	if (old_len == grp->length)	337
156	{	338	PUTBACK;
157	SvREFCNT_dec (grp->fh2);	339	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
158	grp->fh2 = 0;	340	SPAGAIN;
159	break;	341
160	}	342	FREETMPS;
		343	LEAVE;
		344
		345	PUTBACK;
161	}	346	}
162	}
163		347
164	static void aio_grp_dec (aio_req grp)	348	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	}	349	}
178		350
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)	351	static void req_destroy (aio_req req)
290	{	352	{
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)	353	if (req->self)
306	{	354	{
307	sv_unmagic (req->self, PERL_MAGIC_ext);	355	sv_unmagic (req->self, PERL_MAGIC_ext);
308	SvREFCNT_dec (req->self);	356	SvREFCNT_dec (req->self);
309	}	357	}
310		358
311	SvREFCNT_dec (req->data);
312	SvREFCNT_dec (req->fh);	359	SvREFCNT_dec (req->sv1);
313	SvREFCNT_dec (req->fh2);	360	SvREFCNT_dec (req->sv2);
314	SvREFCNT_dec (req->callback);	361	SvREFCNT_dec (req->callback);
315	Safefree (req->statdata);
316
317	if (req->type == REQ_READDIR && req->result >= 0)
318	free (req->data2ptr);
319		362
320	Safefree (req);	363	Safefree (req);
321	}	364	}
322		365
323	static void req_cancel (aio_req req)	366	static void req_cancel_subs (aio_req grp)
324	{	367	{
325	req->cancelled = 1;	368	aio_req sub;
326		369
327	if (req->type == REQ_GROUP)	370	if (grp->type != EIO_GROUP)
		371	return;
		372
		373	SvREFCNT_dec (grp->sv2);
		374	grp->sv2 = 0;
		375
		376	eio_grp_cancel (grp);
		377	}
		378
		379	#ifdef USE_SOCKETS_AS_HANDLES
		380	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		381	#else
		382	# define TO_SOCKET(x) (x)
		383	#endif
		384
		385	static void
		386	create_respipe (void)
		387	{
		388	int old_readfd = respipe [0];
		389
		390	if (respipe [1] >= 0)
		391	respipe_close (TO_SOCKET (respipe [1]));
		392
		393	#ifdef _WIN32
		394	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		395	#else
		396	if (pipe (respipe))
		397	#endif
		398	croak ("unable to initialize result pipe");
		399
		400	if (old_readfd >= 0)
328	{	401	{
329	aio_req sub;	402	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		403	croak ("unable to initialize result pipe(2)");
330		404
331	for (sub = req->grp_first; sub; sub = sub->grp_next)	405	respipe_close (respipe [0]);
332	req_cancel (sub);	406	respipe [0] = old_readfd;
333	}	407	}
334	}
335		408
		409	#ifdef _WIN32
		410	int arg = 1;
		411	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		412	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		413	#else
		414	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		415	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		416	#endif
		417	croak ("unable to initialize result pipe(3)");
		418
		419	respipe_osf [0] = TO_SOCKET (respipe [0]);
		420	respipe_osf [1] = TO_SOCKET (respipe [1]);
		421	}
		422
		423	static void poll_wait (void)
		424	{
		425	fd_set rfd;
		426
		427	while (eio_nreqs ())
		428	{
		429	int size;
		430
		431	X_LOCK (reslock);
		432	size = res_queue.size;
		433	X_UNLOCK (reslock);
		434
		435	if (size)
		436	return;
		437
		438	etp_maybe_start_thread ();
		439
		440	FD_ZERO (&rfd);
		441	FD_SET (respipe [0], &rfd);
		442
		443	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		444	}
		445	}
		446
336	static int poll_cb ()	447	static int poll_cb (void)
337	{	448	{
338	dSP;
339	int count = 0;
340	int do_croak = 0;
341	aio_req req;
342
343	for (;;)	449	for (;;)
344	{	450	{
345	pthread_mutex_lock (&reslock);	451	int res = eio_poll ();
346	req = ress;
347		452
348	if (req)	453	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;	454	croak (0);
367		455
368	--nreqs;	456	if (!max_outstanding || max_outstanding > eio_nreqs ())
		457	return res;
369		458
370	if (req->type == REQ_QUIT)	459	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	}	460	}
399
400	return count;
401	}	461	}
402		462
403	static void *aio_proc(void *arg);
404
405	static void start_thread (void)	463	static void atfork_child (void)
406	{	464	{
407	sigset_t fullsigset, oldsigset;	465	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	}	466	}
423		467
424	static void req_send (aio_req req)	468	static SV *
		469	get_cb (SV *cb_sv)
425	{	470	{
426	while (started < wanted && nreqs >= started)	471	HV *st;
427	start_thread ();	472	GV *gvp;
		473	CV *cv;
428		474
429	++nreqs;	475	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;	476	return 0;
611		477
612	#if HAVE_SENDFILE	478	cv = sv_2cv (cb_sv, &st, &gvp, 0);
613	# if __linux
614	res = sendfile (ofd, ifd, &offset, count);
615		479
616	# elif __freebsd	480	if (!cv)
617	/*	481	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		482
625	if (res < 0 && sbytes)	483	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	}	484	}
915		485
916	#define dREQ \	486	#define dREQ \
		487	SV *cb_cv; \
917	aio_req req; \	488	aio_req req; \
		489	int req_pri = next_pri; \
		490	next_pri = EIO_PRI_DEFAULT; \
918	\	491	\
919	if (SvOK (callback) && !SvROK (callback)) \	492	cb_cv = get_cb (callback); \
920	croak ("callback must be undef or of reference type"); \
921	\	493	\
922	Newz (0, req, 1, aio_cb); \	494	Newz (0, req, 1, eio_req); \
923	if (!req) \	495	if (!req) \
924	croak ("out of memory during aio_req allocation"); \	496	croak ("out of memory during eio_req allocation"); \
925	\	497	\
926	req->callback = newSVsv (callback)	498	req->callback = SvREFCNT_inc (cb_cv); \
		499	req->pri = req_pri
927		500
928	#define REQ_SEND \	501	#define REQ_SEND \
		502	PUTBACK; \
929	req_send (req); \	503	req_submit (req); \
		504	SPAGAIN; \
930	\	505	\
931	if (GIMME_V != G_VOID) \	506	if (GIMME_V != G_VOID) \
932	XPUSHs (req_sv (req, AIO_REQ_KLASS));	507	XPUSHs (req_sv (req, AIO_REQ_KLASS));
933		508
		509	static int
		510	extract_fd (SV *fh, int wr)
		511	{
		512	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		513
		514	if (fd < 0)
		515	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		516
		517	return fd;
		518	}
		519
934	MODULE = IO::AIO PACKAGE = IO::AIO	520	MODULE = IO::AIO PACKAGE = IO::AIO
935		521
936	PROTOTYPES: ENABLE	522	PROTOTYPES: ENABLE
937		523
938	BOOT:	524	BOOT:
939	{	525	{
940	HV *stash = gv_stashpv ("IO::AIO", 1);	526	stash = gv_stashpv ("IO::AIO", 1);
		527
941	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	528	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
942	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	529	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
943	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	530	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		531	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		532	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		533	#ifndef _WIN32
		534	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		535	#endif
		536	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		537	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		538	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		539	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
944		540
945	create_pipe ();	541	create_respipe ();
946	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
947	}
948		542
		543	if (eio_init (want_poll, done_poll) < 0)
		544	croak ("IO::AIO: unable to initialise eio library");
		545
		546	/* atfork child called in fifo order, so before eio's handler */
		547	X_THREAD_ATFORK (0, 0, atfork_child);
		548	}
		549
949	void	550	void
950	min_parallel (nthreads)	551	max_poll_reqs (int nreqs)
951	int nthreads
952	PROTOTYPE: $	552	PROTOTYPE: $
		553	CODE:
		554	eio_set_max_poll_reqs (nreqs);
953		555
954	void	556	void
955	max_parallel (nthreads)	557	max_poll_time (double nseconds)
956	int nthreads
957	PROTOTYPE: $	558	PROTOTYPE: $
958
959	int
960	max_outstanding (nreqs)
961	int nreqs
962	PROTOTYPE: $
963	CODE:	559	CODE:
964	RETVAL = max_outstanding;	560	eio_set_max_poll_time (nseconds);
		561
		562	void
		563	min_parallel (int nthreads)
		564	PROTOTYPE: $
		565	CODE:
		566	eio_set_min_parallel (nthreads);
		567
		568	void
		569	max_parallel (int nthreads)
		570	PROTOTYPE: $
		571	CODE:
		572	eio_set_max_parallel (nthreads);
		573
		574	void
		575	max_idle (int nthreads)
		576	PROTOTYPE: $
		577	CODE:
		578	eio_set_max_idle (nthreads);
		579
		580	void
		581	max_outstanding (int maxreqs)
		582	PROTOTYPE: $
		583	CODE:
965	max_outstanding = nreqs;	584	max_outstanding = maxreqs;
966		585
967	void	586	void
968	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	587	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: $$$;$	588	PROTOTYPE: $$$;$
974	PPCODE:	589	PPCODE:
975	{	590	{
976	dREQ;	591	dREQ;
977		592
978	req->type = REQ_OPEN;	593	req->type = EIO_OPEN;
979	req->data = newSVsv (pathname);	594	req->sv1 = newSVsv (pathname);
980	req->dataptr = SvPVbyte_nolen (req->data);	595	req->ptr1 = SvPVbyte_nolen (req->sv1);
981	req->fd = flags;	596	req->int1 = flags;
982	req->mode = mode;	597	req->int2 = mode;
983		598
984	REQ_SEND;	599	REQ_SEND;
985	}	600	}
986		601
987	void	602	void
988	aio_close (fh,callback=&PL_sv_undef)	603	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
989	SV * fh
990	SV * callback
991	PROTOTYPE: $;$	604	PROTOTYPE: $;$
992	ALIAS:	605	ALIAS:
993	aio_close = REQ_CLOSE
994	aio_fsync = REQ_FSYNC	606	aio_fsync = EIO_FSYNC
995	aio_fdatasync = REQ_FDATASYNC	607	aio_fdatasync = EIO_FDATASYNC
996	PPCODE:	608	PPCODE:
997	{	609	{
		610	int fd = extract_fd (fh, 0);
998	dREQ;	611	dREQ;
999		612
1000	req->type = ix;	613	req->type = ix;
1001	req->fh = newSVsv (fh);	614	req->sv1 = newSVsv (fh);
1002	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	615	req->int1 = fd;
1003		616
1004	REQ_SEND (req);	617	REQ_SEND (req);
1005	}	618	}
1006		619
1007	void	620	void
		621	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		622	PROTOTYPE: $$$$;$
		623	PPCODE:
		624	{
		625	int fd = extract_fd (fh, 0);
		626	dREQ;
		627
		628	req->type = EIO_SYNC_FILE_RANGE;
		629	req->sv1 = newSVsv (fh);
		630	req->int1 = fd;
		631	req->offs = SvVAL64 (offset);
		632	req->size = SvVAL64 (nbytes);
		633	req->int2 = flags;
		634
		635	REQ_SEND (req);
		636	}
		637
		638	void
		639	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		640	PROTOTYPE: $;$
		641	PPCODE:
		642	{
		643	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		644	int fd = extract_fd (fh, 0);
		645	dREQ;
		646
		647	if (close_pipe < 0)
		648	{
		649	int pipefd [2];
		650
		651	if (pipe (pipefd) < 0
		652	|| close (pipefd [1]) < 0
		653	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		654	abort (); /*D*/
		655
		656	close_pipe = pipefd [0];
		657	}
		658
		659	req->type = EIO_DUP2;
		660	req->int1 = close_pipe;
		661	req->sv2 = newSVsv (fh);
		662	req->int2 = fd;
		663
		664	REQ_SEND (req);
		665	}
		666
		667	void
1008	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	668	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1009	SV * fh
1010	UV offset
1011	UV length
1012	SV * data
1013	UV dataoffset
1014	SV * callback
1015	ALIAS:	669	ALIAS:
1016	aio_read = REQ_READ	670	aio_read = EIO_READ
1017	aio_write = REQ_WRITE	671	aio_write = EIO_WRITE
1018	PROTOTYPE: $$$$$;$	672	PROTOTYPE: $$$$$;$
1019	PPCODE:	673	PPCODE:
1020	{	674	{
1021	aio_req req;
1022	STRLEN svlen;	675	STRLEN svlen;
		676	int fd = extract_fd (fh, ix == EIO_WRITE);
1023	char *svptr = SvPVbyte (data, svlen);	677	char *svptr = SvPVbyte (data, svlen);
1024		678	UV len = SvUV (length);
1025	SvUPGRADE (data, SVt_PV);
1026	SvPOK_on (data);
1027		679
1028	if (dataoffset < 0)	680	if (dataoffset < 0)
1029	dataoffset += svlen;	681	dataoffset += svlen;
1030		682
1031	if (dataoffset < 0 || dataoffset > svlen)	683	if (dataoffset < 0 || dataoffset > svlen)
1032	croak ("data offset outside of string");	684	croak ("dataoffset outside of data scalar");
1033		685
1034	if (ix == REQ_WRITE)	686	if (ix == EIO_WRITE)
1035	{	687	{
1036	/* write: check length and adjust. */	688	/* write: check length and adjust. */
1037	if (length < 0 || length + dataoffset > svlen)	689	if (!SvOK (length) || len + dataoffset > svlen)
1038	length = svlen - dataoffset;	690	len = svlen - dataoffset;
1039	}	691	}
1040	else	692	else
1041	{	693	{
1042	/* read: grow scalar as necessary */	694	/* read: check type and grow scalar as necessary */
		695	SvUPGRADE (data, SVt_PV);
1043	svptr = SvGROW (data, length + dataoffset);	696	svptr = SvGROW (data, len + dataoffset + 1);
1044	}	697	}
1045
1046	if (length < 0)
1047	croak ("length must not be negative");
1048		698
1049	{	699	{
1050	dREQ;	700	dREQ;
1051		701
1052	req->type = ix;	702	req->type = ix;
1053	req->fh = newSVsv (fh);	703	req->sv1 = newSVsv (fh);
1054	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	704	req->int1 = fd;
1055	: IoOFP (sv_2io (fh)));	705	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1056	req->offset = offset;	706	req->size = len;
1057	req->length = length;
1058	req->data = SvREFCNT_inc (data);	707	req->sv2 = SvREFCNT_inc (data);
1059	req->dataptr = (char *)svptr + dataoffset;	708	req->ptr2 = (char *)svptr + dataoffset;
		709	req->stroffset = dataoffset;
1060		710
1061	if (!SvREADONLY (data))	711	if (!SvREADONLY (data))
1062	{	712	{
1063	SvREADONLY_on (data);	713	SvREADONLY_on (data);
1064	req->data2ptr = (void *)data;	714	req->flags |= FLAG_SV2_RO_OFF;
1065	}	715	}
1066		716
1067	REQ_SEND;	717	REQ_SEND;
1068	}	718	}
1069	}	719	}
1070		720
1071	void	721	void
		722	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		723	PROTOTYPE: $$;$
		724	PPCODE:
		725	{
		726	SV *data;
		727	dREQ;
		728
		729	req->type = EIO_READLINK;
		730	req->sv1 = newSVsv (path);
		731	req->ptr1 = SvPVbyte_nolen (req->sv1);
		732
		733	REQ_SEND;
		734	}
		735
		736	void
1072	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	737	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: $$$$;$	738	PROTOTYPE: $$$$;$
1079	PPCODE:	739	PPCODE:
1080	{	740	{
		741	int ifd = extract_fd (in_fh , 0);
		742	int ofd = extract_fd (out_fh, 0);
1081	dREQ;	743	dREQ;
1082		744
1083	req->type = REQ_SENDFILE;	745	req->type = EIO_SENDFILE;
1084	req->fh = newSVsv (out_fh);	746	req->sv1 = newSVsv (out_fh);
1085	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	747	req->int1 = ofd;
1086	req->fh2 = newSVsv (in_fh);	748	req->sv2 = newSVsv (in_fh);
1087	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	749	req->int2 = ifd;
1088	req->offset = in_offset;	750	req->offs = SvVAL64 (in_offset);
1089	req->length = length;	751	req->size = length;
1090		752
1091	REQ_SEND;	753	REQ_SEND;
1092	}	754	}
1093		755
1094	void	756	void
1095	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	757	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1096	SV * fh
1097	UV offset
1098	IV length
1099	SV * callback
1100	PROTOTYPE: $$$;$	758	PROTOTYPE: $$$;$
1101	PPCODE:	759	PPCODE:
1102	{	760	{
		761	int fd = extract_fd (fh, 0);
1103	dREQ;	762	dREQ;
1104		763
1105	req->type = REQ_READAHEAD;	764	req->type = EIO_READAHEAD;
1106	req->fh = newSVsv (fh);	765	req->sv1 = newSVsv (fh);
1107	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	766	req->int1 = fd;
1108	req->offset = offset;	767	req->offs = SvVAL64 (offset);
1109	req->length = length;	768	req->size = length;
1110		769
1111	REQ_SEND;	770	REQ_SEND;
1112	}	771	}
1113		772
1114	void	773	void
1115	aio_stat (fh_or_path,callback=&PL_sv_undef)	774	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1116	SV * fh_or_path
1117	SV * callback
1118	ALIAS:	775	ALIAS:
1119	aio_stat = REQ_STAT	776	aio_stat = EIO_STAT
1120	aio_lstat = REQ_LSTAT	777	aio_lstat = EIO_LSTAT
1121	PPCODE:	778	PPCODE:
1122	{	779	{
1123	dREQ;	780	dREQ;
1124		781
1125	New (0, req->statdata, 1, Stat_t);	782	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		783
1132	if (SvPOK (fh_or_path))	784	if (SvPOK (req->sv1))
1133	{	785	{
1134	req->type = ix;	786	req->type = ix;
1135	req->data = newSVsv (fh_or_path);
1136	req->dataptr = SvPVbyte_nolen (req->data);	787	req->ptr1 = SvPVbyte_nolen (req->sv1);
1137	}	788	}
1138	else	789	else
1139	{	790	{
1140	req->type = REQ_FSTAT;	791	req->type = EIO_FSTAT;
1141	req->fh = newSVsv (fh_or_path);
1142	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	792	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1143	}	793	}
1144		794
1145	REQ_SEND;	795	REQ_SEND;
1146	}	796	}
1147		797
1148	void	798	void
		799	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		800	PPCODE:
		801	{
		802	dREQ;
		803
		804	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		805	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		806	req->sv1 = newSVsv (fh_or_path);
		807
		808	if (SvPOK (req->sv1))
		809	{
		810	req->type = EIO_UTIME;
		811	req->ptr1 = SvPVbyte_nolen (req->sv1);
		812	}
		813	else
		814	{
		815	req->type = EIO_FUTIME;
		816	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		817	}
		818
		819	REQ_SEND;
		820	}
		821
		822	void
		823	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		824	PPCODE:
		825	{
		826	dREQ;
		827
		828	req->sv1 = newSVsv (fh_or_path);
		829	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		830
		831	if (SvPOK (req->sv1))
		832	{
		833	req->type = EIO_TRUNCATE;
		834	req->ptr1 = SvPVbyte_nolen (req->sv1);
		835	}
		836	else
		837	{
		838	req->type = EIO_FTRUNCATE;
		839	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		840	}
		841
		842	REQ_SEND;
		843	}
		844
		845	void
		846	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		847	ALIAS:
		848	aio_chmod = EIO_CHMOD
		849	aio_mkdir = EIO_MKDIR
		850	PPCODE:
		851	{
		852	dREQ;
		853
		854	req->int2 = mode;
		855	req->sv1 = newSVsv (fh_or_path);
		856
		857	if (SvPOK (req->sv1))
		858	{
		859	req->type = ix;
		860	req->ptr1 = SvPVbyte_nolen (req->sv1);
		861	}
		862	else
		863	{
		864	req->type = EIO_FCHMOD;
		865	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		866	}
		867
		868	REQ_SEND;
		869	}
		870
		871	void
		872	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		873	PPCODE:
		874	{
		875	dREQ;
		876
		877	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		878	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		879	req->sv1 = newSVsv (fh_or_path);
		880
		881	if (SvPOK (req->sv1))
		882	{
		883	req->type = EIO_CHOWN;
		884	req->ptr1 = SvPVbyte_nolen (req->sv1);
		885	}
		886	else
		887	{
		888	req->type = EIO_FCHOWN;
		889	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		890	}
		891
		892	REQ_SEND;
		893	}
		894
		895	void
1149	aio_unlink (pathname,callback=&PL_sv_undef)	896	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1150	SV * pathname
1151	SV * callback
1152	ALIAS:	897	ALIAS:
1153	aio_unlink = REQ_UNLINK	898	aio_unlink = EIO_UNLINK
1154	aio_rmdir = REQ_RMDIR	899	aio_rmdir = EIO_RMDIR
1155	aio_readdir = REQ_READDIR	900	aio_readdir = EIO_READDIR
1156	PPCODE:	901	PPCODE:
1157	{	902	{
1158	dREQ;	903	dREQ;
1159		904
1160	req->type = ix;	905	req->type = ix;
1161	req->data = newSVsv (pathname);	906	req->sv1 = newSVsv (pathname);
1162	req->dataptr = SvPVbyte_nolen (req->data);	907	req->ptr1 = SvPVbyte_nolen (req->sv1);
		908
		909	REQ_SEND;
		910	}
		911
		912	void
		913	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		914	ALIAS:
		915	aio_link = EIO_LINK
		916	aio_symlink = EIO_SYMLINK
		917	aio_rename = EIO_RENAME
		918	PPCODE:
		919	{
		920	dREQ;
		921
		922	req->type = ix;
		923	req->sv1 = newSVsv (oldpath);
		924	req->ptr1 = SvPVbyte_nolen (req->sv1);
		925	req->sv2 = newSVsv (newpath);
		926	req->ptr2 = SvPVbyte_nolen (req->sv2);
1163		927
1164	REQ_SEND;	928	REQ_SEND;
1165	}	929	}
1166		930
1167	void	931	void
1168	aio_link (oldpath,newpath,callback=&PL_sv_undef)	932	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:	933	PPCODE:
1177	{	934	{
1178	dREQ;	935	dREQ;
1179		936
1180	req->type = ix;	937	req->type = EIO_MKNOD;
1181	req->fh = newSVsv (oldpath);	938	req->sv1 = newSVsv (pathname);
1182	req->data2ptr = SvPVbyte_nolen (req->fh);	939	req->ptr1 = SvPVbyte_nolen (req->sv1);
1183	req->data = newSVsv (newpath);	940	req->int2 = (mode_t)mode;
1184	req->dataptr = SvPVbyte_nolen (req->data);	941	req->offs = dev;
1185		942
1186	REQ_SEND;	943	REQ_SEND;
1187	}	944	}
1188		945
1189	void	946	void
1190	aio_sleep (delay,callback=&PL_sv_undef)	947	aio_busy (double delay, SV *callback=&PL_sv_undef)
1191	double delay
1192	SV * callback
1193	PPCODE:	948	PPCODE:
1194	{	949	{
1195	dREQ;	950	dREQ;
1196		951
1197	req->type = REQ_SLEEP;	952	req->type = EIO_BUSY;
1198	req->fd = delay < 0. ? 0 : delay;	953	req->nv1 = delay < 0. ? 0. : delay;
1199	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1200		954
1201	REQ_SEND;	955	REQ_SEND;
1202	}	956	}
1203		957
1204	void	958	void
1205	aio_group (callback=&PL_sv_undef)	959	aio_group (SV *callback=&PL_sv_undef)
1206	SV * callback
1207	PROTOTYPE: ;$	960	PROTOTYPE: ;$
1208	PPCODE:	961	PPCODE:
1209	{	962	{
1210	dREQ;	963	dREQ;
		964
1211	req->type = REQ_GROUP;	965	req->type = EIO_GROUP;
		966
1212	req_send (req);	967	req_submit (req);
1213	XPUSHs (req_sv (req, AIO_GRP_KLASS));	968	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1214	}	969	}
		970
		971	void
		972	aio_nop (SV *callback=&PL_sv_undef)
		973	ALIAS:
		974	aio_nop = EIO_NOP
		975	aio_sync = EIO_SYNC
		976	PPCODE:
		977	{
		978	dREQ;
		979
		980	req->type = ix;
		981
		982	REQ_SEND;
		983	}
		984
		985	int
		986	aioreq_pri (int pri = 0)
		987	PROTOTYPE: ;$
		988	CODE:
		989	RETVAL = next_pri;
		990	if (items > 0)
		991	{
		992	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		993	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		994	next_pri = pri;
		995	}
		996	OUTPUT:
		997	RETVAL
		998
		999	void
		1000	aioreq_nice (int nice = 0)
		1001	CODE:
		1002	nice = next_pri - nice;
		1003	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1004	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1005	next_pri = nice;
1215		1006
1216	void	1007	void
1217	flush ()	1008	flush ()
1218	PROTOTYPE:	1009	PROTOTYPE:
1219	CODE:	1010	CODE:
1220	while (nreqs)	1011	while (eio_nreqs ())
1221	{	1012	{
1222	poll_wait ();	1013	poll_wait ();
1223	poll_cb ();	1014	poll_cb ();
1224	}	1015	}
1225		1016
1226	void	1017	int
1227	poll()	1018	poll()
1228	PROTOTYPE:	1019	PROTOTYPE:
1229	CODE:	1020	CODE:
1230	if (nreqs)
1231	{
1232	poll_wait ();	1021	poll_wait ();
1233	poll_cb ();	1022	RETVAL = poll_cb ();
1234	}	1023	OUTPUT:
		1024	RETVAL
1235		1025
1236	int	1026	int
1237	poll_fileno()	1027	poll_fileno()
1238	PROTOTYPE:	1028	PROTOTYPE:
1239	CODE:	1029	CODE:
…		…
1251		1041
1252	void	1042	void
1253	poll_wait()	1043	poll_wait()
1254	PROTOTYPE:	1044	PROTOTYPE:
1255	CODE:	1045	CODE:
1256	if (nreqs)
1257	poll_wait ();	1046	poll_wait ();
1258		1047
1259	int	1048	int
1260	nreqs()	1049	nreqs()
1261	PROTOTYPE:	1050	PROTOTYPE:
1262	CODE:	1051	CODE:
1263	RETVAL = nreqs;	1052	RETVAL = eio_nreqs ();
1264	OUTPUT:	1053	OUTPUT:
1265	RETVAL	1054	RETVAL
1266		1055
		1056	int
		1057	nready()
		1058	PROTOTYPE:
		1059	CODE:
		1060	RETVAL = eio_nready ();
		1061	OUTPUT:
		1062	RETVAL
		1063
		1064	int
		1065	npending()
		1066	PROTOTYPE:
		1067	CODE:
		1068	RETVAL = eio_npending ();
		1069	OUTPUT:
		1070	RETVAL
		1071
		1072	int
		1073	nthreads()
		1074	PROTOTYPE:
		1075	CODE:
		1076	RETVAL = eio_nthreads ();
		1077	OUTPUT:
		1078	RETVAL
		1079
		1080	void _on_next_submit (SV *cb)
		1081	CODE:
		1082	SvREFCNT_dec (on_next_submit);
		1083	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1084
1267	PROTOTYPES: DISABLE	1085	PROTOTYPES: DISABLE
1268		1086
1269	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1087	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1270		1088
1271	void	1089	void
1272	cancel (aio_req_ornot req)	1090	cancel (aio_req_ornot req)
1273	PROTOTYPE:
1274	CODE:	1091	CODE:
1275	req_cancel (req);	1092	eio_cancel (req);
		1093
		1094	void
		1095	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1096	PPCODE:
		1097	{
		1098	if (GIMME_V != G_VOID)
		1099	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1100
		1101	if (items > 1)
		1102	{
		1103	SV *cb_cv = get_cb (callback);
		1104
		1105	SvREFCNT_dec (req->callback);
		1106	req->callback = SvREFCNT_inc (cb_cv);
		1107	}
		1108	}
1276		1109
1277	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1110	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1278		1111
1279	void	1112	void
1280	add (aio_req grp, ...)	1113	add (aio_req grp, ...)
1281	PPCODE:	1114	PPCODE:
1282	{	1115	{
1283	int i;	1116	int i;
1284	aio_req req;
1285		1117
1286	if (grp->fd == 2)	1118	if (grp->int1 == 2)
1287	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1119	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1288		1120
1289	for (i = 1; i < items; ++i )	1121	for (i = 1; i < items; ++i )
1290	{	1122	{
		1123	aio_req req;
		1124
1291	if (GIMME_V != G_VOID)	1125	if (GIMME_V != G_VOID)
1292	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1126	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1293		1127
1294	req = SvAIO_REQ (ST (i));	1128	req = SvAIO_REQ (ST (i));
1295		1129
1296	if (req)	1130	if (req)
1297	{	1131	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	}	1132	}
1309	}
1310	}	1133	}
		1134
		1135	void
		1136	cancel_subs (aio_req_ornot req)
		1137	CODE:
		1138	req_cancel_subs (req);
1311		1139
1312	void	1140	void
1313	result (aio_req grp, ...)	1141	result (aio_req grp, ...)
1314	CODE:	1142	CODE:
1315	{	1143	{
1316	int i;	1144	int i;
		1145	AV *av;
		1146
		1147	grp->errorno = errno;
		1148
1317	AV *av = newAV ();	1149	av = newAV ();
1318		1150
1319	for (i = 1; i < items; ++i )	1151	for (i = 1; i < items; ++i )
1320	av_push (av, newSVsv (ST (i)));	1152	av_push (av, newSVsv (ST (i)));
1321		1153
1322	SvREFCNT_dec (grp->data);	1154	SvREFCNT_dec (grp->sv1);
1323	grp->data = (SV *)av;	1155	grp->sv1 = (SV *)av;
1324	}	1156	}
1325		1157
1326	void	1158	void
1327	lock (aio_req grp)	1159	errno (aio_req grp, int errorno = errno)
1328	CODE:	1160	CODE:
1329	++grp->length;	1161	grp->errorno = errorno;
1330		1162
1331	void	1163	void
1332	unlock (aio_req grp)
1333	CODE:
1334	aio_grp_dec (grp);
1335
1336	void
1337	feeder_limit (aio_req grp, int limit)	1164	limit (aio_req grp, int limit)
1338	CODE:	1165	CODE:
1339	grp->fd2 = limit;	1166	eio_grp_limit (grp, limit);
1340	aio_grp_feed (grp);
1341		1167
1342	void	1168	void
1343	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)	1169	feed (aio_req grp, SV *callback=&PL_sv_undef)
1344	CODE:	1170	CODE:
1345	{	1171	{
1346	SvREFCNT_dec (grp->fh2);	1172	SvREFCNT_dec (grp->sv2);
1347	grp->fh2 = newSVsv (callback);	1173	grp->sv2 = newSVsv (callback);
		1174	grp->feed = aio_grp_feed;
1348		1175
1349	if (grp->fd2 <= 0)	1176	if (grp->int2 <= 0)
1350	grp->fd2 = 2;	1177	grp->int2 = 2;
1351		1178
1352	aio_grp_feed (grp);	1179	eio_grp_limit (grp, grp->int2);
1353	}	1180	}
1354		1181

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