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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.64 by root, Mon Oct 23 23:54:41 2006 UTC vs.
Revision 1.133 by root, Wed Oct 22 18:15:36 2008 UTC

1	#if __linux	1	#include "libeio/xthread.h"
2	# define _GNU_SOURCE
3	#endif
4
5	#define _REENTRANT 1
6		2
7	#include <errno.h>	3	#include <errno.h>
8		4
9	#include "EXTERN.h"	5	#include "EXTERN.h"
10	#include "perl.h"	6	#include "perl.h"
11	#include "XSUB.h"	7	#include "XSUB.h"
12		8
13	#include "autoconf/config.h"
14
15	#include <pthread.h>
16
17	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
18	#include <errno.h>	11	#include <errno.h>
19	#include <sys/time.h>
20	#include <sys/select.h>
21	#include <sys/types.h>	12	#include <sys/types.h>
22	#include <sys/stat.h>	13	#include <sys/stat.h>
23	#include <limits.h>	14	#include <limits.h>
24	#include <unistd.h>
25	#include <fcntl.h>	15	#include <fcntl.h>
26	#include <signal.h>
27	#include <sched.h>	16	#include <sched.h>
28		17
29	#if HAVE_SENDFILE	18	/* perl namespace pollution */
30	# if __linux	19	#undef VERSION
31	# include <sys/sendfile.h>	20
32	# elif __freebsd	21	#ifdef _WIN32
33	# include <sys/socket.h>	22
34	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
35	# elif __hpux	24	# undef malloc
36	# include <sys/socket.h>	25	# undef free
37	# elif __solaris /* not yet */	26
38	# 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
39	# else	59	#else
40	# error sendfile support requested but not available	60
41	# 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
42	#endif	68	#endif
43		69
44	/* used for struct dirent, AIX doesn't provide it */	70	/* perl stupidly overrides readdir and maybe others */
45	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
46	# 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
47	#endif	83	#endif
48		84
49	#if __ia64	85	/*****************************************************************************/
50	# define STACKSIZE 65536	86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
51	#else	89	#else
52	# define STACKSIZE 8192	90	# define expect(expr,value) (expr)
53	#endif	91	#endif
54		92
55	enum {	93	#define expect_false(expr) expect ((expr) != 0, 0)
56	REQ_QUIT,	94	#define expect_true(expr) expect ((expr) != 0, 1)
57	REQ_OPEN, REQ_CLOSE,	95
58	REQ_READ, REQ_WRITE, REQ_READAHEAD,	96	/*****************************************************************************/
59	REQ_SENDFILE,	97
60	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	98	static HV *stash;
61	REQ_FSYNC, REQ_FDATASYNC,	99	typedef SV SV8; /* byte-sv, used for argument-checking */
62	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
63	REQ_READDIR,
64	REQ_LINK, REQ_SYMLINK,
65	REQ_GROUP, REQ_NOP,
66	REQ_SLEEP,
67	};
68		100
69	#define AIO_REQ_KLASS "IO::AIO::REQ"	101	#define AIO_REQ_KLASS "IO::AIO::REQ"
70	#define AIO_GRP_KLASS "IO::AIO::GRP"	102	#define AIO_GRP_KLASS "IO::AIO::GRP"
71		103
72	typedef struct aio_cb	104	#define EIO_REQ_MEMBERS \
73	{
74	struct aio_cb *volatile next;
75
76	SV *data, *callback;	105	SV *callback; \
77	SV *fh, *fh2;	106	SV *sv1, *sv2; \
78	void *dataptr, *data2ptr;
79	Stat_t *statdata;
80	off_t offset;
81	size_t length;
82	ssize_t result;
83
84	STRLEN dataoffset;	107	STRLEN stroffset; \
85	int type;	108	SV *self;
86	int fd, fd2;
87	int errorno;
88	mode_t mode; /* open */
89		109
90	unsigned char flags;	110	#define EIO_NO_WRAPPERS 1
91	unsigned char pri;
92		111
93	SV *self; /* the perl counterpart of this request, if any */	112	#include "libeio/eio.h"
94	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	113
95	} aio_cb;	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)
96		118
97	enum {	119	enum {
98	FLAG_CANCELLED = 0x01,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
99	};	121	};
100		122
		123	#include "libeio/eio.c"
		124
101	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
102	typedef aio_cb *aio_req_ornot;	126	typedef eio_req *aio_req_ornot;
103		127
104	enum {	128	static SV *on_next_submit;
105	PRI_MIN = -4,	129	static int next_pri = EIO_PRI_DEFAULT;
106	PRI_MAX = 4,
107
108	DEFAULT_PRI = 0,
109	PRI_BIAS = -PRI_MIN,
110	};
111
112	static int next_pri = DEFAULT_PRI + PRI_BIAS;
113
114	static int started, wanted;
115	static volatile int nreqs;
116	static int max_outstanding = 1<<30;	130	static int max_outstanding;
117	static int respipe [2];
118		131
119	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
120	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
121	#else
122	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
123	#endif
124		133
125	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	134	static void req_destroy (aio_req req);
126	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
127	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
128
129	static volatile aio_req reqs, reqe; /* queue start, queue end */
130	static volatile aio_req ress, rese; /* queue start, queue end */
131
132	static void req_invoke (aio_req req);	135	static void req_cancel (aio_req req);
133	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	}
134		150
135	/* must be called at most once */	151	/* must be called at most once */
136	static SV *req_sv (aio_req req, const char *klass)	152	static SV *req_sv (aio_req req, const char *klass)
137	{	153	{
138	if (!req->self)	154	if (!req->self)
…		…
156	return mg ? (aio_req)mg->mg_ptr : 0;	172	return mg ? (aio_req)mg->mg_ptr : 0;
157	}	173	}
158		174
159	static void aio_grp_feed (aio_req grp)	175	static void aio_grp_feed (aio_req grp)
160	{	176	{
161	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	177	if (grp->sv2 && SvOK (grp->sv2))
162	{	178	{
163	int old_len = grp->length;	179	dSP;
164		180
165	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)
166	{	225	{
167	dSP;	226	case EIO_READDIR:
		227	{
		228	SV *rv = &PL_sv_undef;
168		229
169	ENTER;	230	if (req->result >= 0)
170	SAVETMPS;	231	{
171	PUSHMARK (SP);	232	int i;
172	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	233	char *buf = req->ptr2;
173	PUTBACK;	234	AV *av = newAV ();
174	call_sv (grp->fh2, G_VOID | G_EVAL);	235
175	SPAGAIN;	236	av_extend (av, req->result - 1);
176	FREETMPS;	237
177	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;
178	}	330	}
179		331
180	/* stop if no progress has been made */	332	errno = req->errorno;
181	if (old_len == grp->length)	333
182	{	334	PUTBACK;
183	SvREFCNT_dec (grp->fh2);	335	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
184	grp->fh2 = 0;	336	SPAGAIN;
185	break;	337
186	}	338	FREETMPS;
		339	LEAVE;
		340
		341	PUTBACK;
187	}	342	}
188	}
189		343
190	static void aio_grp_dec (aio_req grp)	344	return !!SvTRUE (ERRSV);
191	{
192	--grp->length;
193
194	/* call feeder, if applicable */
195	aio_grp_feed (grp);
196
197	/* finish, if done */
198	if (!grp->length && grp->fd)
199	{
200	req_invoke (grp);
201	req_free (grp);
202	}
203	}	345	}
204		346
205	static void poll_wait ()
206	{
207	fd_set rfd;
208
209	while (nreqs)
210	{
211	aio_req req;
212	#if !(__x86 || __x86_64) /* safe without sempahore on this archs */
213	pthread_mutex_lock (&reslock);
214	#endif
215	req = ress;
216	#if !(__x86 || __x86_64) /* safe without sempahore on this archs */
217	pthread_mutex_unlock (&reslock);
218	#endif
219
220	if (req)
221	return;
222
223	FD_ZERO(&rfd);
224	FD_SET(respipe [0], &rfd);
225
226	select (respipe [0] + 1, &rfd, 0, 0, 0);
227	}
228	}
229
230	static void req_invoke (aio_req req)
231	{
232	dSP;
233	int errorno = errno;
234
235	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
236	return;
237
238	errno = req->errorno;
239
240	ENTER;
241	SAVETMPS;
242	PUSHMARK (SP);
243	EXTEND (SP, 1);
244
245	switch (req->type)
246	{
247	case REQ_READDIR:
248	{
249	SV *rv = &PL_sv_undef;
250
251	if (req->result >= 0)
252	{
253	char *buf = req->data2ptr;
254	AV *av = newAV ();
255
256	while (req->result)
257	{
258	SV *sv = newSVpv (buf, 0);
259
260	av_push (av, sv);
261	buf += SvCUR (sv) + 1;
262	req->result--;
263	}
264
265	rv = sv_2mortal (newRV_noinc ((SV *)av));
266	}
267
268	PUSHs (rv);
269	}
270	break;
271
272	case REQ_OPEN:
273	{
274	/* convert fd to fh */
275	SV *fh;
276
277	PUSHs (sv_2mortal (newSViv (req->result)));
278	PUTBACK;
279	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
280	SPAGAIN;
281
282	fh = SvREFCNT_inc (POPs);
283
284	PUSHMARK (SP);
285	XPUSHs (sv_2mortal (fh));
286	}
287	break;
288
289	case REQ_GROUP:
290	req->fd = 2; /* mark group as finished */
291
292	if (req->data)
293	{
294	int i;
295	AV *av = (AV *)req->data;
296
297	EXTEND (SP, AvFILL (av) + 1);
298	for (i = 0; i <= AvFILL (av); ++i)
299	PUSHs (*av_fetch (av, i, 0));
300	}
301	break;
302
303	case REQ_NOP:
304	case REQ_SLEEP:
305	break;
306
307	default:
308	PUSHs (sv_2mortal (newSViv (req->result)));
309	break;
310	}
311
312
313	PUTBACK;
314	call_sv (req->callback, G_VOID | G_EVAL);
315	SPAGAIN;
316
317	FREETMPS;
318	LEAVE;
319
320	errno = errorno;
321
322	if (SvTRUE (ERRSV))
323	{
324	req_free (req);
325	croak (0);
326	}
327	}
328
329	static void req_free (aio_req req)	347	static void req_destroy (aio_req req)
330	{	348	{
331	if (req->grp)
332	{
333	aio_req grp = req->grp;
334
335	/* unlink request */
336	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
337	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
338
339	if (grp->grp_first == req)
340	grp->grp_first = req->grp_next;
341
342	aio_grp_dec (grp);
343	}
344
345	if (req->self)	349	if (req->self)
346	{	350	{
347	sv_unmagic (req->self, PERL_MAGIC_ext);	351	sv_unmagic (req->self, PERL_MAGIC_ext);
348	SvREFCNT_dec (req->self);	352	SvREFCNT_dec (req->self);
349	}	353	}
350		354
351	SvREFCNT_dec (req->data);
352	SvREFCNT_dec (req->fh);	355	SvREFCNT_dec (req->sv1);
353	SvREFCNT_dec (req->fh2);	356	SvREFCNT_dec (req->sv2);
354	SvREFCNT_dec (req->callback);	357	SvREFCNT_dec (req->callback);
355	Safefree (req->statdata);
356
357	if (req->type == REQ_READDIR && req->result >= 0)
358	free (req->data2ptr);
359		358
360	Safefree (req);	359	Safefree (req);
361	}	360	}
362		361
363	static void req_cancel (aio_req req)	362	static void req_cancel_subs (aio_req grp)
364	{	363	{
365	req->flags |= FLAG_CANCELLED;	364	aio_req sub;
366		365
367	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)
368	{	397	{
369	aio_req sub;	398	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		399	croak ("unable to initialize result pipe(2)");
370		400
371	for (sub = req->grp_first; sub; sub = sub->grp_next)	401	respipe_close (respipe [0]);
372	req_cancel (sub);	402	respipe [0] = old_readfd;
373	}	403	}
374	}
375		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
376	static int poll_cb ()	443	static int poll_cb (void)
377	{	444	{
378	dSP;
379	int count = 0;
380	int do_croak = 0;
381	aio_req req;
382
383	for (;;)	445	for (;;)
384	{	446	{
385	pthread_mutex_lock (&reslock);	447	int res = eio_poll ();
386	req = ress;
387		448
388	if (req)	449	if (res > 0)
389	{
390	ress = req->next;
391
392	if (!ress)
393	{
394	/* read any signals sent by the worker threads */
395	char buf [32];
396	while (read (respipe [0], buf, 32) == 32)
397	;
398
399	rese = 0;
400	}
401	}
402
403	pthread_mutex_unlock (&reslock);
404
405	if (!req)
406	break;	450	croak (0);
407		451
408	--nreqs;	452	if (!max_outstanding || max_outstanding > eio_nreqs ())
		453	return res;
409		454
410	if (req->type == REQ_QUIT)	455	poll_wait ();
411	started--;
412	else if (req->type == REQ_GROUP && req->length)
413	{
414	req->fd = 1; /* mark request as delayed */
415	continue;
416	}
417	else
418	{
419	if (req->type == REQ_READ)
420	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
421
422	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
423	SvREADONLY_off (req->data);
424
425	if (req->statdata)
426	{
427	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
428	PL_laststatval = req->result;
429	PL_statcache = *(req->statdata);
430	}
431
432	req_invoke (req);
433
434	count++;
435	}
436
437	req_free (req);
438	}	456	}
439
440	return count;
441	}	457	}
442		458
443	static void *aio_proc(void *arg);
444
445	static void start_thread (void)	459	static void atfork_child (void)
446	{	460	{
447	sigset_t fullsigset, oldsigset;	461	create_respipe ();
448	pthread_t tid;
449	pthread_attr_t attr;
450
451	pthread_attr_init (&attr);
452	pthread_attr_setstacksize (&attr, STACKSIZE);
453	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
454
455	sigfillset (&fullsigset);
456	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
457
458	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
459	started++;
460
461	sigprocmask (SIG_SETMASK, &oldsigset, 0);
462	}	462	}
463		463
464	static void req_send (aio_req req)	464	static SV *
		465	get_cb (SV *cb_sv)
465	{	466	{
466	while (started < wanted && nreqs >= started)	467	HV *st;
467	start_thread ();	468	GV *gvp;
		469	CV *cv;
468		470
469	++nreqs;	471	if (!SvOK (cb_sv))
470
471	pthread_mutex_lock (&reqlock);
472
473	req->next = 0;
474
475	if (reqe)
476	{
477	reqe->next = req;
478	reqe = req;
479	}
480	else
481	reqe = reqs = req;
482
483	pthread_cond_signal (&reqwait);
484	pthread_mutex_unlock (&reqlock);
485
486	if (nreqs > max_outstanding)
487	for (;;)
488	{
489	poll_cb ();
490
491	if (nreqs <= max_outstanding)
492	break;
493
494	poll_wait ();
495	}
496	}
497
498	static void end_thread (void)
499	{
500	aio_req req;
501	Newz (0, req, 1, aio_cb);
502	req->type = REQ_QUIT;
503
504	req_send (req);
505	}
506
507	static void min_parallel (int nthreads)
508	{
509	if (wanted < nthreads)
510	wanted = nthreads;
511	}
512
513	static void max_parallel (int nthreads)
514	{
515	int cur = started;
516
517	if (wanted > nthreads)
518	wanted = nthreads;
519
520	while (cur > wanted)
521	{
522	end_thread ();
523	cur--;
524	}
525
526	while (started > wanted)
527	{
528	poll_wait ();
529	poll_cb ();
530	}
531	}
532
533	static void create_pipe ()
534	{
535	if (pipe (respipe))
536	croak ("unable to initialize result pipe");
537
538	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
539	croak ("cannot set result pipe to nonblocking mode");
540
541	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
542	croak ("cannot set result pipe to nonblocking mode");
543	}
544
545	/*****************************************************************************/
546	/* work around various missing functions */
547
548	#if !HAVE_PREADWRITE
549	# define pread aio_pread
550	# define pwrite aio_pwrite
551
552	/*
553	* make our pread/pwrite safe against themselves, but not against
554	* normal read/write by using a mutex. slows down execution a lot,
555	* but that's your problem, not mine.
556	*/
557	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
558
559	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
560	{
561	ssize_t res;
562	off_t ooffset;
563
564	pthread_mutex_lock (&preadwritelock);
565	ooffset = lseek (fd, 0, SEEK_CUR);
566	lseek (fd, offset, SEEK_SET);
567	res = read (fd, buf, count);
568	lseek (fd, ooffset, SEEK_SET);
569	pthread_mutex_unlock (&preadwritelock);
570
571	return res;
572	}
573
574	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
575	{
576	ssize_t res;
577	off_t ooffset;
578
579	pthread_mutex_lock (&preadwritelock);
580	ooffset = lseek (fd, 0, SEEK_CUR);
581	lseek (fd, offset, SEEK_SET);
582	res = write (fd, buf, count);
583	lseek (fd, offset, SEEK_SET);
584	pthread_mutex_unlock (&preadwritelock);
585
586	return res;
587	}
588	#endif
589
590	#if !HAVE_FDATASYNC
591	# define fdatasync fsync
592	#endif
593
594	#if !HAVE_READAHEAD
595	# define readahead aio_readahead
596
597	static ssize_t readahead (int fd, off_t offset, size_t count)
598	{
599	char readahead_buf[4096];
600
601	while (count > 0)
602	{
603	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
604
605	pread (fd, readahead_buf, len, offset);
606	offset += len;
607	count -= len;
608	}
609
610	errno = 0;
611	}
612	#endif
613
614	#if !HAVE_READDIR_R
615	# define readdir_r aio_readdir_r
616
617	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
618
619	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
620	{
621	struct dirent *e;
622	int errorno;
623
624	pthread_mutex_lock (&readdirlock);
625
626	e = readdir (dirp);
627	errorno = errno;
628
629	if (e)
630	{
631	*res = ent;
632	strcpy (ent->d_name, e->d_name);
633	}
634	else
635	*res = 0;
636
637	pthread_mutex_unlock (&readdirlock);
638
639	errno = errorno;
640	return e ? 0 : -1;
641	}
642	#endif
643
644	/* sendfile always needs emulation */
645	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
646	{
647	ssize_t res;
648
649	if (!count)
650	return 0;	472	return 0;
651		473
652	#if HAVE_SENDFILE	474	cv = sv_2cv (cb_sv, &st, &gvp, 0);
653	# if __linux
654	res = sendfile (ofd, ifd, &offset, count);
655		475
656	# elif __freebsd	476	if (!cv)
657	/*	477	croak ("IO::AIO callback must be undef or a CODE reference");
658	* Of course, the freebsd sendfile is a dire hack with no thoughts
659	* wasted on making it similar to other I/O functions.
660	*/
661	{
662	off_t sbytes;
663	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
664		478
665	if (res < 0 && sbytes)	479	return (SV *)cv;
666	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
667	res = sbytes;
668	}
669
670	# elif __hpux
671	res = sendfile (ofd, ifd, offset, count, 0, 0);
672
673	# elif __solaris
674	{
675	struct sendfilevec vec;
676	size_t sbytes;
677
678	vec.sfv_fd = ifd;
679	vec.sfv_flag = 0;
680	vec.sfv_off = offset;
681	vec.sfv_len = count;
682
683	res = sendfilev (ofd, &vec, 1, &sbytes);
684
685	if (res < 0 && sbytes)
686	res = sbytes;
687	}
688
689	# endif
690	#else
691	res = -1;
692	errno = ENOSYS;
693	#endif
694
695	if (res < 0
696	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
697	#if __solaris
698	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
699	#endif
700	)
701	)
702	{
703	/* emulate sendfile. this is a major pain in the ass */
704	char buf[4096];
705	res = 0;
706
707	while (count)
708	{
709	ssize_t cnt;
710
711	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
712
713	if (cnt <= 0)
714	{
715	if (cnt && !res) res = -1;
716	break;
717	}
718
719	cnt = write (ofd, buf, cnt);
720
721	if (cnt <= 0)
722	{
723	if (cnt && !res) res = -1;
724	break;
725	}
726
727	offset += cnt;
728	res += cnt;
729	count -= cnt;
730	}
731	}
732
733	return res;
734	}
735
736	/* read a full directory */
737	static int scandir_ (const char *path, void **namesp)
738	{
739	DIR *dirp = opendir (path);
740	union
741	{
742	struct dirent d;
743	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
744	} u;
745	struct dirent *entp;
746	char *name, *names;
747	int memlen = 4096;
748	int memofs = 0;
749	int res = 0;
750	int errorno;
751
752	if (!dirp)
753	return -1;
754
755	names = malloc (memlen);
756
757	for (;;)
758	{
759	errno = 0, readdir_r (dirp, &u.d, &entp);
760
761	if (!entp)
762	break;
763
764	name = entp->d_name;
765
766	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
767	{
768	int len = strlen (name) + 1;
769
770	res++;
771
772	while (memofs + len > memlen)
773	{
774	memlen *= 2;
775	names = realloc (names, memlen);
776	if (!names)
777	break;
778	}
779
780	memcpy (names + memofs, name, len);
781	memofs += len;
782	}
783	}
784
785	errorno = errno;
786	closedir (dirp);
787
788	if (errorno)
789	{
790	free (names);
791	errno = errorno;
792	res = -1;
793	}
794
795	*namesp = (void *)names;
796	return res;
797	}
798
799	/*****************************************************************************/
800
801	static void *aio_proc (void *thr_arg)
802	{
803	aio_req req;
804	int type;
805
806	do
807	{
808	pthread_mutex_lock (&reqlock);
809
810	for (;;)
811	{
812	req = reqs;
813
814	if (reqs)
815	{
816	reqs = reqs->next;
817	if (!reqs) reqe = 0;
818	}
819
820	if (req)
821	break;
822
823	pthread_cond_wait (&reqwait, &reqlock);
824	}
825
826	pthread_mutex_unlock (&reqlock);
827
828	errno = 0; /* strictly unnecessary */
829	type = req->type; /* remember type for QUIT check */
830
831	if (!(req->flags & FLAG_CANCELLED))
832	switch (type)
833	{
834	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
835	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
836
837	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
838	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
839
840	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
841	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
842	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
843
844	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
845	case REQ_CLOSE: req->result = close (req->fd); break;
846	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
847	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
848	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
849	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
850	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
851
852	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
853	case REQ_FSYNC: req->result = fsync (req->fd); break;
854	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
855
856	case REQ_SLEEP:
857	{
858	struct timeval tv;
859
860	tv.tv_sec = req->fd;
861	tv.tv_usec = req->fd2;
862
863	req->result = select (0, 0, 0, 0, &tv);
864	}
865
866	case REQ_GROUP:
867	case REQ_NOP:
868	case REQ_QUIT:
869	break;
870
871	default:
872	req->result = ENOSYS;
873	break;
874	}
875
876	req->errorno = errno;
877
878	pthread_mutex_lock (&reslock);
879
880	req->next = 0;
881
882	if (rese)
883	{
884	rese->next = req;
885	rese = req;
886	}
887	else
888	{
889	rese = ress = req;
890
891	/* write a dummy byte to the pipe so fh becomes ready */
892	write (respipe [1], &respipe, 1);
893	}
894
895	pthread_mutex_unlock (&reslock);
896	}
897	while (type != REQ_QUIT);
898
899	return 0;
900	}
901
902	/*****************************************************************************/
903
904	static void atfork_prepare (void)
905	{
906	pthread_mutex_lock (&reqlock);
907	pthread_mutex_lock (&reslock);
908	#if !HAVE_PREADWRITE
909	pthread_mutex_lock (&preadwritelock);
910	#endif
911	#if !HAVE_READDIR_R
912	pthread_mutex_lock (&readdirlock);
913	#endif
914	}
915
916	static void atfork_parent (void)
917	{
918	#if !HAVE_READDIR_R
919	pthread_mutex_unlock (&readdirlock);
920	#endif
921	#if !HAVE_PREADWRITE
922	pthread_mutex_unlock (&preadwritelock);
923	#endif
924	pthread_mutex_unlock (&reslock);
925	pthread_mutex_unlock (&reqlock);
926	}
927
928	static void atfork_child (void)
929	{
930	aio_req prv;
931
932	started = 0;
933
934	while (reqs)
935	{
936	prv = reqs;
937	reqs = prv->next;
938	req_free (prv);
939	}
940
941	reqs = reqe = 0;
942
943	while (ress)
944	{
945	prv = ress;
946	ress = prv->next;
947	req_free (prv);
948	}
949
950	ress = rese = 0;
951
952	close (respipe [0]);
953	close (respipe [1]);
954	create_pipe ();
955
956	atfork_parent ();
957	}	480	}
958		481
959	#define dREQ \	482	#define dREQ \
		483	SV *cb_cv; \
960	aio_req req; \	484	aio_req req; \
961	int req_pri = next_pri; \	485	int req_pri = next_pri; \
962	next_pri = DEFAULT_PRI + PRI_BIAS; \	486	next_pri = EIO_PRI_DEFAULT; \
963	\	487	\
964	if (SvOK (callback) && !SvROK (callback)) \	488	cb_cv = get_cb (callback); \
965	croak ("callback must be undef or of reference type"); \
966	\	489	\
967	Newz (0, req, 1, aio_cb); \	490	Newz (0, req, 1, eio_req); \
968	if (!req) \	491	if (!req) \
969	croak ("out of memory during aio_req allocation"); \	492	croak ("out of memory during eio_req allocation"); \
970	\	493	\
971	req->callback = newSVsv (callback); \	494	req->callback = SvREFCNT_inc (cb_cv); \
972	req->pri = req_pri	495	req->pri = req_pri
973		496
974	#define REQ_SEND \	497	#define REQ_SEND \
		498	PUTBACK; \
975	req_send (req); \	499	req_submit (req); \
		500	SPAGAIN; \
976	\	501	\
977	if (GIMME_V != G_VOID) \	502	if (GIMME_V != G_VOID) \
978	XPUSHs (req_sv (req, AIO_REQ_KLASS));	503	XPUSHs (req_sv (req, AIO_REQ_KLASS));
979		504
980	MODULE = IO::AIO PACKAGE = IO::AIO	505	MODULE = IO::AIO PACKAGE = IO::AIO
981		506
982	PROTOTYPES: ENABLE	507	PROTOTYPES: ENABLE
983		508
984	BOOT:	509	BOOT:
985	{	510	{
986	HV *stash = gv_stashpv ("IO::AIO", 1);	511	stash = gv_stashpv ("IO::AIO", 1);
		512
987	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	513	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
988	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	514	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
989	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	515	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		516	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		517	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		518	#ifndef _WIN32
		519	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		520	#endif
		521	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		522	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		523	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		524	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
990		525
991	create_pipe ();	526	create_respipe ();
992	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
993	}
994		527
		528	if (eio_init (want_poll, done_poll) < 0)
		529	croak ("IO::AIO: unable to initialise eio library");
		530
		531	/* atfork child called in fifo order, so before eio's handler */
		532	X_THREAD_ATFORK (0, 0, atfork_child);
		533	}
		534
995	void	535	void
996	min_parallel (nthreads)	536	max_poll_reqs (int nreqs)
997	int nthreads
998	PROTOTYPE: $	537	PROTOTYPE: $
		538	CODE:
		539	eio_set_max_poll_reqs (nreqs);
999		540
1000	void	541	void
1001	max_parallel (nthreads)	542	max_poll_time (double nseconds)
1002	int nthreads
1003	PROTOTYPE: $	543	PROTOTYPE: $
1004
1005	int
1006	max_outstanding (nreqs)
1007	int nreqs
1008	PROTOTYPE: $
1009	CODE:	544	CODE:
1010	RETVAL = max_outstanding;	545	eio_set_max_poll_time (nseconds);
		546
		547	void
		548	min_parallel (int nthreads)
		549	PROTOTYPE: $
		550	CODE:
		551	eio_set_min_parallel (nthreads);
		552
		553	void
		554	max_parallel (int nthreads)
		555	PROTOTYPE: $
		556	CODE:
		557	eio_set_max_parallel (nthreads);
		558
		559	void
		560	max_idle (int nthreads)
		561	PROTOTYPE: $
		562	CODE:
		563	eio_set_max_idle (nthreads);
		564
		565	void
		566	max_outstanding (int maxreqs)
		567	PROTOTYPE: $
		568	CODE:
1011	max_outstanding = nreqs;	569	max_outstanding = maxreqs;
1012		570
1013	void	571	void
1014	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	572	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1015	SV * pathname
1016	int flags
1017	int mode
1018	SV * callback
1019	PROTOTYPE: $$$;$	573	PROTOTYPE: $$$;$
1020	PPCODE:	574	PPCODE:
1021	{	575	{
1022	dREQ;	576	dREQ;
1023		577
1024	req->type = REQ_OPEN;	578	req->type = EIO_OPEN;
1025	req->data = newSVsv (pathname);	579	req->sv1 = newSVsv (pathname);
1026	req->dataptr = SvPVbyte_nolen (req->data);	580	req->ptr1 = SvPVbyte_nolen (req->sv1);
1027	req->fd = flags;	581	req->int1 = flags;
1028	req->mode = mode;	582	req->int2 = mode;
1029		583
1030	REQ_SEND;	584	REQ_SEND;
1031	}	585	}
1032		586
1033	void	587	void
1034	aio_close (fh,callback=&PL_sv_undef)	588	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1035	SV * fh
1036	SV * callback
1037	PROTOTYPE: $;$	589	PROTOTYPE: $;$
1038	ALIAS:	590	ALIAS:
1039	aio_close = REQ_CLOSE
1040	aio_fsync = REQ_FSYNC	591	aio_fsync = EIO_FSYNC
1041	aio_fdatasync = REQ_FDATASYNC	592	aio_fdatasync = EIO_FDATASYNC
1042	PPCODE:	593	PPCODE:
1043	{	594	{
1044	dREQ;	595	dREQ;
1045		596
1046	req->type = ix;	597	req->type = ix;
1047	req->fh = newSVsv (fh);	598	req->sv1 = newSVsv (fh);
1048	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	599	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1049		600
1050	REQ_SEND (req);	601	REQ_SEND (req);
1051	}	602	}
1052		603
1053	void	604	void
		605	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		606	PROTOTYPE: $$$$;$
		607	PPCODE:
		608	{
		609	dREQ;
		610
		611	req->type = EIO_SYNC_FILE_RANGE;
		612	req->sv1 = newSVsv (fh);
		613	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		614	req->offs = SvVAL64 (offset);
		615	req->size = SvVAL64 (nbytes);
		616	req->int2 = flags;
		617
		618	REQ_SEND (req);
		619	}
		620
		621	void
		622	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		623	PROTOTYPE: $;$
		624	PPCODE:
		625	{
		626	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		627	dREQ;
		628
		629	if (close_pipe < 0)
		630	{
		631	int pipefd [2];
		632
		633	if (pipe (pipefd) < 0
		634	|| close (pipefd [1]) < 0
		635	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		636	abort (); /*D*/
		637
		638	close_pipe = pipefd [0];
		639	}
		640
		641	req->type = EIO_DUP2;
		642	req->int1 = close_pipe;
		643	req->sv2 = newSVsv (fh);
		644	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		645
		646	REQ_SEND (req);
		647	}
		648
		649	void
1054	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	650	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1055	SV * fh
1056	UV offset
1057	UV length
1058	SV * data
1059	UV dataoffset
1060	SV * callback
1061	ALIAS:	651	ALIAS:
1062	aio_read = REQ_READ	652	aio_read = EIO_READ
1063	aio_write = REQ_WRITE	653	aio_write = EIO_WRITE
1064	PROTOTYPE: $$$$$;$	654	PROTOTYPE: $$$$$;$
1065	PPCODE:	655	PPCODE:
1066	{	656	{
1067	aio_req req;
1068	STRLEN svlen;	657	STRLEN svlen;
1069	char *svptr = SvPVbyte (data, svlen);	658	char *svptr = SvPVbyte (data, svlen);
		659	UV len = SvUV (length);
1070		660
1071	SvUPGRADE (data, SVt_PV);	661	SvUPGRADE (data, SVt_PV);
1072	SvPOK_on (data);	662	SvPOK_on (data);
1073		663
1074	if (dataoffset < 0)	664	if (dataoffset < 0)
1075	dataoffset += svlen;	665	dataoffset += svlen;
1076		666
1077	if (dataoffset < 0 || dataoffset > svlen)	667	if (dataoffset < 0 || dataoffset > svlen)
1078	croak ("data offset outside of string");	668	croak ("dataoffset outside of data scalar");
1079		669
1080	if (ix == REQ_WRITE)	670	if (ix == EIO_WRITE)
1081	{	671	{
1082	/* write: check length and adjust. */	672	/* write: check length and adjust. */
1083	if (length < 0 || length + dataoffset > svlen)	673	if (!SvOK (length) || len + dataoffset > svlen)
1084	length = svlen - dataoffset;	674	len = svlen - dataoffset;
1085	}	675	}
1086	else	676	else
1087	{	677	{
1088	/* read: grow scalar as necessary */	678	/* read: grow scalar as necessary */
1089	svptr = SvGROW (data, length + dataoffset);	679	svptr = SvGROW (data, len + dataoffset + 1);
1090	}	680	}
1091		681
1092	if (length < 0)	682	if (len < 0)
1093	croak ("length must not be negative");	683	croak ("length must not be negative");
1094		684
1095	{	685	{
1096	dREQ;	686	dREQ;
1097		687
1098	req->type = ix;	688	req->type = ix;
1099	req->fh = newSVsv (fh);	689	req->sv1 = newSVsv (fh);
1100	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	690	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1101	: IoOFP (sv_2io (fh)));	691	: IoOFP (sv_2io (fh)));
		692	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1102	req->offset = offset;	693	req->size = len;
1103	req->length = length;
1104	req->data = SvREFCNT_inc (data);	694	req->sv2 = SvREFCNT_inc (data);
1105	req->dataptr = (char *)svptr + dataoffset;	695	req->ptr2 = (char *)svptr + dataoffset;
		696	req->stroffset = dataoffset;
1106		697
1107	if (!SvREADONLY (data))	698	if (!SvREADONLY (data))
1108	{	699	{
1109	SvREADONLY_on (data);	700	SvREADONLY_on (data);
1110	req->data2ptr = (void *)data;	701	req->flags |= FLAG_SV2_RO_OFF;
1111	}	702	}
1112		703
1113	REQ_SEND;	704	REQ_SEND;
1114	}	705	}
1115	}	706	}
1116		707
1117	void	708	void
		709	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		710	PROTOTYPE: $$;$
		711	PPCODE:
		712	{
		713	SV *data;
		714	dREQ;
		715
		716	req->type = EIO_READLINK;
		717	req->sv1 = newSVsv (path);
		718	req->ptr1 = SvPVbyte_nolen (req->sv1);
		719
		720	REQ_SEND;
		721	}
		722
		723	void
1118	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	724	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1119	SV * out_fh
1120	SV * in_fh
1121	UV in_offset
1122	UV length
1123	SV * callback
1124	PROTOTYPE: $$$$;$	725	PROTOTYPE: $$$$;$
1125	PPCODE:	726	PPCODE:
1126	{	727	{
1127	dREQ;	728	dREQ;
1128		729
1129	req->type = REQ_SENDFILE;	730	req->type = EIO_SENDFILE;
1130	req->fh = newSVsv (out_fh);	731	req->sv1 = newSVsv (out_fh);
1131	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	732	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1132	req->fh2 = newSVsv (in_fh);	733	req->sv2 = newSVsv (in_fh);
1133	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	734	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1134	req->offset = in_offset;	735	req->offs = SvVAL64 (in_offset);
1135	req->length = length;	736	req->size = length;
1136		737
1137	REQ_SEND;	738	REQ_SEND;
1138	}	739	}
1139		740
1140	void	741	void
1141	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	742	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1142	SV * fh
1143	UV offset
1144	IV length
1145	SV * callback
1146	PROTOTYPE: $$$;$	743	PROTOTYPE: $$$;$
1147	PPCODE:	744	PPCODE:
1148	{	745	{
1149	dREQ;	746	dREQ;
1150		747
1151	req->type = REQ_READAHEAD;	748	req->type = EIO_READAHEAD;
1152	req->fh = newSVsv (fh);	749	req->sv1 = newSVsv (fh);
1153	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	750	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1154	req->offset = offset;	751	req->offs = SvVAL64 (offset);
1155	req->length = length;	752	req->size = length;
1156		753
1157	REQ_SEND;	754	REQ_SEND;
1158	}	755	}
1159		756
1160	void	757	void
1161	aio_stat (fh_or_path,callback=&PL_sv_undef)	758	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1162	SV * fh_or_path
1163	SV * callback
1164	ALIAS:	759	ALIAS:
1165	aio_stat = REQ_STAT	760	aio_stat = EIO_STAT
1166	aio_lstat = REQ_LSTAT	761	aio_lstat = EIO_LSTAT
1167	PPCODE:	762	PPCODE:
1168	{	763	{
1169	dREQ;	764	dREQ;
1170		765
1171	New (0, req->statdata, 1, Stat_t);	766	req->sv1 = newSVsv (fh_or_path);
1172	if (!req->statdata)
1173	{
1174	req_free (req);
1175	croak ("out of memory during aio_req->statdata allocation");
1176	}
1177		767
1178	if (SvPOK (fh_or_path))	768	if (SvPOK (req->sv1))
1179	{	769	{
1180	req->type = ix;	770	req->type = ix;
1181	req->data = newSVsv (fh_or_path);
1182	req->dataptr = SvPVbyte_nolen (req->data);	771	req->ptr1 = SvPVbyte_nolen (req->sv1);
1183	}	772	}
1184	else	773	else
1185	{	774	{
1186	req->type = REQ_FSTAT;	775	req->type = EIO_FSTAT;
1187	req->fh = newSVsv (fh_or_path);
1188	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	776	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1189	}	777	}
1190		778
1191	REQ_SEND;	779	REQ_SEND;
1192	}	780	}
1193		781
1194	void	782	void
		783	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		784	PPCODE:
		785	{
		786	dREQ;
		787
		788	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		789	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		790	req->sv1 = newSVsv (fh_or_path);
		791
		792	if (SvPOK (req->sv1))
		793	{
		794	req->type = EIO_UTIME;
		795	req->ptr1 = SvPVbyte_nolen (req->sv1);
		796	}
		797	else
		798	{
		799	req->type = EIO_FUTIME;
		800	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		801	}
		802
		803	REQ_SEND;
		804	}
		805
		806	void
		807	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		808	PPCODE:
		809	{
		810	dREQ;
		811
		812	req->sv1 = newSVsv (fh_or_path);
		813	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		814
		815	if (SvPOK (req->sv1))
		816	{
		817	req->type = EIO_TRUNCATE;
		818	req->ptr1 = SvPVbyte_nolen (req->sv1);
		819	}
		820	else
		821	{
		822	req->type = EIO_FTRUNCATE;
		823	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		824	}
		825
		826	REQ_SEND;
		827	}
		828
		829	void
		830	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		831	ALIAS:
		832	aio_chmod = EIO_CHMOD
		833	aio_mkdir = EIO_MKDIR
		834	PPCODE:
		835	{
		836	dREQ;
		837
		838	req->int2 = mode;
		839	req->sv1 = newSVsv (fh_or_path);
		840
		841	if (SvPOK (req->sv1))
		842	{
		843	req->type = ix;
		844	req->ptr1 = SvPVbyte_nolen (req->sv1);
		845	}
		846	else
		847	{
		848	req->type = EIO_FCHMOD;
		849	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		850	}
		851
		852	REQ_SEND;
		853	}
		854
		855	void
		856	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		857	PPCODE:
		858	{
		859	dREQ;
		860
		861	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		862	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		863	req->sv1 = newSVsv (fh_or_path);
		864
		865	if (SvPOK (req->sv1))
		866	{
		867	req->type = EIO_CHOWN;
		868	req->ptr1 = SvPVbyte_nolen (req->sv1);
		869	}
		870	else
		871	{
		872	req->type = EIO_FCHOWN;
		873	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		874	}
		875
		876	REQ_SEND;
		877	}
		878
		879	void
1195	aio_unlink (pathname,callback=&PL_sv_undef)	880	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1196	SV * pathname
1197	SV * callback
1198	ALIAS:	881	ALIAS:
1199	aio_unlink = REQ_UNLINK	882	aio_unlink = EIO_UNLINK
1200	aio_rmdir = REQ_RMDIR	883	aio_rmdir = EIO_RMDIR
1201	aio_readdir = REQ_READDIR	884	aio_readdir = EIO_READDIR
1202	PPCODE:	885	PPCODE:
1203	{	886	{
1204	dREQ;	887	dREQ;
1205		888
1206	req->type = ix;	889	req->type = ix;
1207	req->data = newSVsv (pathname);	890	req->sv1 = newSVsv (pathname);
1208	req->dataptr = SvPVbyte_nolen (req->data);	891	req->ptr1 = SvPVbyte_nolen (req->sv1);
		892
		893	REQ_SEND;
		894	}
		895
		896	void
		897	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		898	ALIAS:
		899	aio_link = EIO_LINK
		900	aio_symlink = EIO_SYMLINK
		901	aio_rename = EIO_RENAME
		902	PPCODE:
		903	{
		904	dREQ;
		905
		906	req->type = ix;
		907	req->sv1 = newSVsv (oldpath);
		908	req->ptr1 = SvPVbyte_nolen (req->sv1);
		909	req->sv2 = newSVsv (newpath);
		910	req->ptr2 = SvPVbyte_nolen (req->sv2);
1209		911
1210	REQ_SEND;	912	REQ_SEND;
1211	}	913	}
1212		914
1213	void	915	void
1214	aio_link (oldpath,newpath,callback=&PL_sv_undef)	916	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1215	SV * oldpath
1216	SV * newpath
1217	SV * callback
1218	ALIAS:
1219	aio_link = REQ_LINK
1220	aio_symlink = REQ_SYMLINK
1221	aio_rename = REQ_RENAME
1222	PPCODE:	917	PPCODE:
1223	{	918	{
1224	dREQ;	919	dREQ;
1225		920
1226	req->type = ix;	921	req->type = EIO_MKNOD;
1227	req->fh = newSVsv (oldpath);	922	req->sv1 = newSVsv (pathname);
1228	req->data2ptr = SvPVbyte_nolen (req->fh);	923	req->ptr1 = SvPVbyte_nolen (req->sv1);
1229	req->data = newSVsv (newpath);	924	req->int2 = (mode_t)mode;
1230	req->dataptr = SvPVbyte_nolen (req->data);	925	req->offs = dev;
1231		926
1232	REQ_SEND;	927	REQ_SEND;
1233	}	928	}
1234		929
1235	void	930	void
1236	aio_sleep (delay,callback=&PL_sv_undef)	931	aio_busy (double delay, SV *callback=&PL_sv_undef)
1237	double delay
1238	SV * callback
1239	PPCODE:	932	PPCODE:
1240	{	933	{
1241	dREQ;	934	dREQ;
1242		935
1243	req->type = REQ_SLEEP;	936	req->type = EIO_BUSY;
1244	req->fd = delay < 0. ? 0 : delay;	937	req->nv1 = delay < 0. ? 0. : delay;
1245	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1246		938
1247	REQ_SEND;	939	REQ_SEND;
1248	}	940	}
1249		941
1250	void	942	void
1251	aio_group (callback=&PL_sv_undef)	943	aio_group (SV *callback=&PL_sv_undef)
1252	SV * callback
1253	PROTOTYPE: ;$	944	PROTOTYPE: ;$
1254	PPCODE:	945	PPCODE:
1255	{	946	{
1256	dREQ;	947	dREQ;
1257		948
1258	req->type = REQ_GROUP;	949	req->type = EIO_GROUP;
		950
1259	req_send (req);	951	req_submit (req);
1260
1261	XPUSHs (req_sv (req, AIO_GRP_KLASS));	952	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1262	}	953	}
1263		954
1264	void	955	void
1265	aio_nop (callback=&PL_sv_undef)	956	aio_nop (SV *callback=&PL_sv_undef)
1266	SV * callback	957	ALIAS:
		958	aio_nop = EIO_NOP
		959	aio_sync = EIO_SYNC
1267	PPCODE:	960	PPCODE:
1268	{	961	{
1269	dREQ;	962	dREQ;
1270		963
1271	req->type = REQ_NOP;	964	req->type = ix;
1272		965
1273	REQ_SEND;	966	REQ_SEND;
1274	}	967	}
1275		968
1276	#if 0	969	int
1277		970	aioreq_pri (int pri = 0)
1278	void	971	PROTOTYPE: ;$
1279	aio_pri (int pri = DEFAULT_PRI)
1280	CODE:	972	CODE:
		973	RETVAL = next_pri;
		974	if (items > 0)
		975	{
1281	if (pri < PRI_MIN) pri = PRI_MIN;	976	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1282	if (pri > PRI_MAX) pri = PRI_MAX;	977	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1283	next_pri = pri + PRI_BIAS;	978	next_pri = pri;
		979	}
		980	OUTPUT:
		981	RETVAL
1284		982
1285	#endif	983	void
		984	aioreq_nice (int nice = 0)
		985	CODE:
		986	nice = next_pri - nice;
		987	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		988	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		989	next_pri = nice;
1286		990
1287	void	991	void
1288	flush ()	992	flush ()
1289	PROTOTYPE:	993	PROTOTYPE:
1290	CODE:	994	CODE:
1291	while (nreqs)	995	while (eio_nreqs ())
1292	{	996	{
1293	poll_wait ();	997	poll_wait ();
1294	poll_cb ();	998	poll_cb ();
1295	}	999	}
1296		1000
1297	void	1001	int
1298	poll()	1002	poll()
1299	PROTOTYPE:	1003	PROTOTYPE:
1300	CODE:	1004	CODE:
1301	if (nreqs)
1302	{
1303	poll_wait ();	1005	poll_wait ();
1304	poll_cb ();	1006	RETVAL = poll_cb ();
1305	}	1007	OUTPUT:
		1008	RETVAL
1306		1009
1307	int	1010	int
1308	poll_fileno()	1011	poll_fileno()
1309	PROTOTYPE:	1012	PROTOTYPE:
1310	CODE:	1013	CODE:
…		…
1322		1025
1323	void	1026	void
1324	poll_wait()	1027	poll_wait()
1325	PROTOTYPE:	1028	PROTOTYPE:
1326	CODE:	1029	CODE:
1327	if (nreqs)
1328	poll_wait ();	1030	poll_wait ();
1329		1031
1330	int	1032	int
1331	nreqs()	1033	nreqs()
1332	PROTOTYPE:	1034	PROTOTYPE:
1333	CODE:	1035	CODE:
1334	RETVAL = nreqs;	1036	RETVAL = eio_nreqs ();
1335	OUTPUT:	1037	OUTPUT:
1336	RETVAL	1038	RETVAL
1337		1039
		1040	int
		1041	nready()
		1042	PROTOTYPE:
		1043	CODE:
		1044	RETVAL = eio_nready ();
		1045	OUTPUT:
		1046	RETVAL
		1047
		1048	int
		1049	npending()
		1050	PROTOTYPE:
		1051	CODE:
		1052	RETVAL = eio_npending ();
		1053	OUTPUT:
		1054	RETVAL
		1055
		1056	int
		1057	nthreads()
		1058	PROTOTYPE:
		1059	CODE:
		1060	RETVAL = eio_nthreads ();
		1061	OUTPUT:
		1062	RETVAL
		1063
		1064	void _on_next_submit (SV *cb)
		1065	CODE:
		1066	SvREFCNT_dec (on_next_submit);
		1067	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1068
1338	PROTOTYPES: DISABLE	1069	PROTOTYPES: DISABLE
1339		1070
1340	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1071	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1341		1072
1342	void	1073	void
1343	cancel (aio_req_ornot req)	1074	cancel (aio_req_ornot req)
1344	PROTOTYPE:
1345	CODE:	1075	CODE:
1346	req_cancel (req);	1076	eio_cancel (req);
1347		1077
1348	void	1078	void
1349	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1079	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1350	CODE:	1080	PPCODE:
		1081	{
		1082	if (GIMME_V != G_VOID)
		1083	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1084
		1085	if (items > 1)
		1086	{
		1087	SV *cb_cv = get_cb (callback);
		1088
1351	SvREFCNT_dec (req->callback);	1089	SvREFCNT_dec (req->callback);
1352	req->callback = newSVsv (callback);	1090	req->callback = SvREFCNT_inc (cb_cv);
		1091	}
		1092	}
1353		1093
1354	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1094	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1355		1095
1356	void	1096	void
1357	add (aio_req grp, ...)	1097	add (aio_req grp, ...)
1358	PPCODE:	1098	PPCODE:
1359	{	1099	{
1360	int i;	1100	int i;
1361	aio_req req;
1362		1101
1363	if (grp->fd == 2)	1102	if (grp->int1 == 2)
1364	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1103	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1365		1104
1366	for (i = 1; i < items; ++i )	1105	for (i = 1; i < items; ++i )
1367	{	1106	{
		1107	aio_req req;
		1108
1368	if (GIMME_V != G_VOID)	1109	if (GIMME_V != G_VOID)
1369	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1110	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1370		1111
1371	req = SvAIO_REQ (ST (i));	1112	req = SvAIO_REQ (ST (i));
1372		1113
1373	if (req)	1114	if (req)
1374	{	1115	eio_grp_add (grp, req);
1375	++grp->length;
1376	req->grp = grp;
1377
1378	req->grp_prev = 0;
1379	req->grp_next = grp->grp_first;
1380
1381	if (grp->grp_first)
1382	grp->grp_first->grp_prev = req;
1383
1384	grp->grp_first = req;
1385	}	1116	}
1386	}
1387	}	1117	}
		1118
		1119	void
		1120	cancel_subs (aio_req_ornot req)
		1121	CODE:
		1122	req_cancel_subs (req);
1388		1123
1389	void	1124	void
1390	result (aio_req grp, ...)	1125	result (aio_req grp, ...)
1391	CODE:	1126	CODE:
1392	{	1127	{
1393	int i;	1128	int i;
		1129	AV *av;
		1130
		1131	grp->errorno = errno;
		1132
1394	AV *av = newAV ();	1133	av = newAV ();
1395		1134
1396	for (i = 1; i < items; ++i )	1135	for (i = 1; i < items; ++i )
1397	av_push (av, newSVsv (ST (i)));	1136	av_push (av, newSVsv (ST (i)));
1398		1137
1399	SvREFCNT_dec (grp->data);	1138	SvREFCNT_dec (grp->sv1);
1400	grp->data = (SV *)av;	1139	grp->sv1 = (SV *)av;
1401	}	1140	}
1402		1141
1403	void	1142	void
		1143	errno (aio_req grp, int errorno = errno)
		1144	CODE:
		1145	grp->errorno = errorno;
		1146
		1147	void
1404	feed_limit (aio_req grp, int limit)	1148	limit (aio_req grp, int limit)
1405	CODE:	1149	CODE:
1406	grp->fd2 = limit;	1150	eio_grp_limit (grp, limit);
1407	aio_grp_feed (grp);
1408		1151
1409	void	1152	void
1410	feed (aio_req grp, SV *callback=&PL_sv_undef)	1153	feed (aio_req grp, SV *callback=&PL_sv_undef)
1411	CODE:	1154	CODE:
1412	{	1155	{
1413	SvREFCNT_dec (grp->fh2);	1156	SvREFCNT_dec (grp->sv2);
1414	grp->fh2 = newSVsv (callback);	1157	grp->sv2 = newSVsv (callback);
		1158	grp->feed = aio_grp_feed;
1415		1159
1416	if (grp->fd2 <= 0)	1160	if (grp->int2 <= 0)
1417	grp->fd2 = 2;	1161	grp->int2 = 2;
1418		1162
1419	aio_grp_feed (grp);	1163	eio_grp_limit (grp, grp->int2);
1420	}	1164	}
1421		1165

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