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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.66 by root, Tue Oct 24 00:34:47 2006 UTC vs.
Revision 1.124 by root, Thu May 29 03:20:40 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	#define EIO_STRUCT_STAT Stat_t
45	#ifndef NAME_MAX	71
46	# define NAME_MAX 4096	72	/* use NV for 32 bit perls as it allows larger offsets */
		73	#if IVSIZE >= 8
		74	# define SvVAL64 SvIV
		75	#else
		76	# define SvVAL64 SvNV
47	#endif	77	#endif
48		78
49	#if __ia64	79	static HV *stash;
50	# define STACKSIZE 65536	80	typedef SV SV8; /* byte-sv, used for argument-checking */
51	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
52	# define STACKSIZE PTHREAD_STACK_MIN
53	#else
54	# define STACKSIZE 16384
55	#endif
56
57	/* buffer size for various temporary buffers */
58	#define AIO_BUFSIZE 65536
59
60	#define dBUF \
61	char *aio_buf = malloc (AIO_BUFSIZE); \
62	if (!aio_buf) \
63	return -1;
64
65	#define fBUF free (aio_buf)
66
67	enum {
68	REQ_QUIT,
69	REQ_OPEN, REQ_CLOSE,
70	REQ_READ, REQ_WRITE, REQ_READAHEAD,
71	REQ_SENDFILE,
72	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
73	REQ_FSYNC, REQ_FDATASYNC,
74	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
75	REQ_READDIR,
76	REQ_LINK, REQ_SYMLINK,
77	REQ_GROUP, REQ_NOP,
78	REQ_SLEEP,
79	};
80		81
81	#define AIO_REQ_KLASS "IO::AIO::REQ"	82	#define AIO_REQ_KLASS "IO::AIO::REQ"
82	#define AIO_GRP_KLASS "IO::AIO::GRP"	83	#define AIO_GRP_KLASS "IO::AIO::GRP"
83		84
84	typedef struct aio_cb	85	#define EIO_REQ_MEMBERS \
85	{
86	struct aio_cb *volatile next;
87
88	SV *data, *callback;	86	SV *callback; \
89	SV *fh, *fh2;	87	SV *sv1, *sv2; \
90	void *dataptr, *data2ptr;
91	Stat_t *statdata;
92	off_t offset;
93	size_t length;
94	ssize_t result;
95
96	STRLEN dataoffset;	88	STRLEN stroffset; \
97	int type;	89	SV *self;
98	int fd, fd2;
99	int errorno;
100	mode_t mode; /* open */
101		90
102	unsigned char flags;	91	#define EIO_NO_WRAPPERS 1
103	unsigned char pri;
104		92
105	SV *self; /* the perl counterpart of this request, if any */	93	#include "libeio/eio.h"
106	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	94
107	} aio_cb;	95	static int req_invoke (eio_req *req);
		96	#define EIO_FINISH(req) req_invoke (req)
		97	static void aio_grp_feed (eio_req *grp);
		98	#define EIO_FEED(req) aio_grp_feed (req)
		99	static void req_destroy (eio_req *grp);
		100	#define EIO_DESTROY(req) req_destroy (req)
108		101
109	enum {	102	enum {
110	FLAG_CANCELLED = 0x01,	103	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
111	};	104	};
112		105
		106	#include "libeio/eio.c"
		107
113	typedef aio_cb *aio_req;	108	typedef eio_req *aio_req;
114	typedef aio_cb *aio_req_ornot;	109	typedef eio_req *aio_req_ornot;
115		110
116	enum {	111	static SV *on_next_submit;
117	PRI_MIN = -4,	112	static int next_pri = EIO_PRI_DEFAULT;
118	PRI_MAX = 4,
119
120	DEFAULT_PRI = 0,
121	PRI_BIAS = -PRI_MIN,
122	};
123
124	static int next_pri = DEFAULT_PRI + PRI_BIAS;
125
126	static int started, wanted;
127	static volatile int nreqs;
128	static int max_outstanding = 1<<30;	113	static int max_outstanding;
129	static int respipe [2];
130		114
131	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	115	static int respipe_osf [2], respipe [2] = { -1, -1 };
132	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
133	#else
134	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
135	#endif
136		116
137	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	117	static void req_destroy (aio_req req);
138	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
139	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
140
141	static volatile aio_req reqs, reqe; /* queue start, queue end */
142	static volatile aio_req ress, rese; /* queue start, queue end */
143
144	static void req_invoke (aio_req req);	118	static void req_cancel (aio_req req);
145	static void req_free (aio_req req);	119
		120	static void want_poll (void)
		121	{
		122	/* write a dummy byte to the pipe so fh becomes ready */
		123	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		124	}
		125
		126	static void done_poll (void)
		127	{
		128	/* read any signals sent by the worker threads */
		129	char buf [4];
		130	while (respipe_read (respipe [0], buf, 4) == 4)
		131	;
		132	}
146		133
147	/* must be called at most once */	134	/* must be called at most once */
148	static SV *req_sv (aio_req req, const char *klass)	135	static SV *req_sv (aio_req req, const char *klass)
149	{	136	{
150	if (!req->self)	137	if (!req->self)
…		…
168	return mg ? (aio_req)mg->mg_ptr : 0;	155	return mg ? (aio_req)mg->mg_ptr : 0;
169	}	156	}
170		157
171	static void aio_grp_feed (aio_req grp)	158	static void aio_grp_feed (aio_req grp)
172	{	159	{
173	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	160	if (grp->sv2 && SvOK (grp->sv2))
174	{	161	{
175	int old_len = grp->length;	162	dSP;
176		163
177	if (grp->fh2 && SvOK (grp->fh2))	164	ENTER;
		165	SAVETMPS;
		166	PUSHMARK (SP);
		167	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		168	PUTBACK;
		169	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		170	SPAGAIN;
		171	FREETMPS;
		172	LEAVE;
		173	}
		174	}
		175
		176	static void req_submit (eio_req *req)
		177	{
		178	eio_submit (req);
		179
		180	if (on_next_submit)
		181	{
		182	dSP;
		183	SV *cb = sv_2mortal (on_next_submit);
		184
		185	on_next_submit = 0;
		186
		187	PUSHMARK (SP);
		188	PUTBACK;
		189	call_sv (cb, G_DISCARD | G_EVAL);
		190	}
		191	}
		192
		193	static int req_invoke (eio_req *req)
		194	{
		195	dSP;
		196
		197	if (req->flags & FLAG_SV2_RO_OFF)
		198	SvREADONLY_off (req->sv2);
		199
		200	if (!EIO_CANCELLED (req) && SvOK (req->callback))
		201	{
		202	ENTER;
		203	SAVETMPS;
		204	PUSHMARK (SP);
		205	EXTEND (SP, 1);
		206
		207	switch (req->type)
178	{	208	{
179	dSP;	209	case EIO_READDIR:
		210	{
		211	SV *rv = &PL_sv_undef;
180		212
181	ENTER;	213	if (req->result >= 0)
182	SAVETMPS;	214	{
183	PUSHMARK (SP);	215	int i;
184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	216	char *buf = req->ptr2;
185	PUTBACK;	217	AV *av = newAV ();
186	call_sv (grp->fh2, G_VOID | G_EVAL);	218
187	SPAGAIN;	219	av_extend (av, req->result - 1);
188	FREETMPS;	220
189	LEAVE;	221	for (i = 0; i < req->result; ++i)
		222	{
		223	SV *sv = newSVpv (buf, 0);
		224
		225	av_store (av, i, sv);
		226	buf += SvCUR (sv) + 1;
		227	}
		228
		229	rv = sv_2mortal (newRV_noinc ((SV *)av));
		230	}
		231
		232	PUSHs (rv);
		233	}
		234	break;
		235
		236	case EIO_OPEN:
		237	{
		238	/* convert fd to fh */
		239	SV *fh = &PL_sv_undef;
		240
		241	if (req->result >= 0)
		242	{
		243	GV *gv = (GV *)sv_newmortal ();
		244	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		245	char sym [64];
		246	int symlen;
		247
		248	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		249	gv_init (gv, stash, sym, symlen, 0);
		250
		251	symlen = snprintf (
		252	sym,
		253	sizeof (sym),
		254	"%s&=%d",
		255	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		256	req->result
		257	);
		258
		259	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		260	fh = (SV *)gv;
		261	}
		262
		263	PUSHs (fh);
		264	}
		265	break;
		266
		267	case EIO_GROUP:
		268	req->int1 = 2; /* mark group as finished */
		269
		270	if (req->sv1)
		271	{
		272	int i;
		273	AV *av = (AV *)req->sv1;
		274
		275	EXTEND (SP, AvFILL (av) + 1);
		276	for (i = 0; i <= AvFILL (av); ++i)
		277	PUSHs (*av_fetch (av, i, 0));
		278	}
		279	break;
		280
		281	case EIO_NOP:
		282	case EIO_BUSY:
		283	break;
		284
		285	case EIO_READLINK:
		286	if (req->result > 0)
		287	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		288	break;
		289
		290	case EIO_STAT:
		291	case EIO_LSTAT:
		292	case EIO_FSTAT:
		293	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		294	PL_laststatval = req->result;
		295	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		296	PUSHs (sv_2mortal (newSViv (req->result)));
		297	break;
		298
		299	case EIO_READ:
		300	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		301	*SvEND (req->sv2) = 0;
		302	PUSHs (sv_2mortal (newSViv (req->result)));
		303	break;
		304
		305	case EIO_DUP2:
		306	if (req->result > 0)
		307	req->result = 0;
		308	/* FALLTHROUGH */
		309
		310	default:
		311	PUSHs (sv_2mortal (newSViv (req->result)));
		312	break;
190	}	313	}
191		314
192	/* stop if no progress has been made */	315	errno = req->errorno;
193	if (old_len == grp->length)	316
194	{	317	PUTBACK;
195	SvREFCNT_dec (grp->fh2);	318	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
196	grp->fh2 = 0;	319	SPAGAIN;
197	break;	320
198	}	321	FREETMPS;
		322	LEAVE;
		323
		324	PUTBACK;
199	}	325	}
200	}
201		326
202	static void aio_grp_dec (aio_req grp)	327	return !!SvTRUE (ERRSV);
203	{
204	--grp->length;
205
206	/* call feeder, if applicable */
207	aio_grp_feed (grp);
208
209	/* finish, if done */
210	if (!grp->length && grp->fd)
211	{
212	req_invoke (grp);
213	req_free (grp);
214	}
215	}	328	}
216		329
217	static void poll_wait ()
218	{
219	fd_set rfd;
220
221	while (nreqs)
222	{
223	aio_req req;
224	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
225	pthread_mutex_lock (&reslock);
226	#endif
227	req = ress;
228	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
229	pthread_mutex_unlock (&reslock);
230	#endif
231
232	if (req)
233	return;
234
235	FD_ZERO(&rfd);
236	FD_SET(respipe [0], &rfd);
237
238	select (respipe [0] + 1, &rfd, 0, 0, 0);
239	}
240	}
241
242	static void req_invoke (aio_req req)
243	{
244	dSP;
245	int errorno = errno;
246
247	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
248	return;
249
250	errno = req->errorno;
251
252	ENTER;
253	SAVETMPS;
254	PUSHMARK (SP);
255	EXTEND (SP, 1);
256
257	switch (req->type)
258	{
259	case REQ_READDIR:
260	{
261	SV *rv = &PL_sv_undef;
262
263	if (req->result >= 0)
264	{
265	char *buf = req->data2ptr;
266	AV *av = newAV ();
267
268	while (req->result)
269	{
270	SV *sv = newSVpv (buf, 0);
271
272	av_push (av, sv);
273	buf += SvCUR (sv) + 1;
274	req->result--;
275	}
276
277	rv = sv_2mortal (newRV_noinc ((SV *)av));
278	}
279
280	PUSHs (rv);
281	}
282	break;
283
284	case REQ_OPEN:
285	{
286	/* convert fd to fh */
287	SV *fh;
288
289	PUSHs (sv_2mortal (newSViv (req->result)));
290	PUTBACK;
291	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
292	SPAGAIN;
293
294	fh = SvREFCNT_inc (POPs);
295
296	PUSHMARK (SP);
297	XPUSHs (sv_2mortal (fh));
298	}
299	break;
300
301	case REQ_GROUP:
302	req->fd = 2; /* mark group as finished */
303
304	if (req->data)
305	{
306	int i;
307	AV *av = (AV *)req->data;
308
309	EXTEND (SP, AvFILL (av) + 1);
310	for (i = 0; i <= AvFILL (av); ++i)
311	PUSHs (*av_fetch (av, i, 0));
312	}
313	break;
314
315	case REQ_NOP:
316	case REQ_SLEEP:
317	break;
318
319	default:
320	PUSHs (sv_2mortal (newSViv (req->result)));
321	break;
322	}
323
324
325	PUTBACK;
326	call_sv (req->callback, G_VOID | G_EVAL);
327	SPAGAIN;
328
329	FREETMPS;
330	LEAVE;
331
332	errno = errorno;
333
334	if (SvTRUE (ERRSV))
335	{
336	req_free (req);
337	croak (0);
338	}
339	}
340
341	static void req_free (aio_req req)	330	static void req_destroy (aio_req req)
342	{	331	{
343	if (req->grp)
344	{
345	aio_req grp = req->grp;
346
347	/* unlink request */
348	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
349	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
350
351	if (grp->grp_first == req)
352	grp->grp_first = req->grp_next;
353
354	aio_grp_dec (grp);
355	}
356
357	if (req->self)	332	if (req->self)
358	{	333	{
359	sv_unmagic (req->self, PERL_MAGIC_ext);	334	sv_unmagic (req->self, PERL_MAGIC_ext);
360	SvREFCNT_dec (req->self);	335	SvREFCNT_dec (req->self);
361	}	336	}
362		337
363	SvREFCNT_dec (req->data);
364	SvREFCNT_dec (req->fh);	338	SvREFCNT_dec (req->sv1);
365	SvREFCNT_dec (req->fh2);	339	SvREFCNT_dec (req->sv2);
366	SvREFCNT_dec (req->callback);	340	SvREFCNT_dec (req->callback);
367	Safefree (req->statdata);
368
369	if (req->type == REQ_READDIR && req->result >= 0)
370	free (req->data2ptr);
371		341
372	Safefree (req);	342	Safefree (req);
373	}	343	}
374		344
375	static void req_cancel (aio_req req)	345	static void req_cancel_subs (aio_req grp)
376	{	346	{
377	req->flags |= FLAG_CANCELLED;	347	aio_req sub;
378		348
379	if (req->type == REQ_GROUP)	349	if (grp->type != EIO_GROUP)
		350	return;
		351
		352	SvREFCNT_dec (grp->sv2);
		353	grp->sv2 = 0;
		354
		355	eio_grp_cancel (grp);
		356	}
		357
		358	#ifdef USE_SOCKETS_AS_HANDLES
		359	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		360	#else
		361	# define TO_SOCKET(x) (x)
		362	#endif
		363
		364	static void
		365	create_respipe (void)
		366	{
		367	int old_readfd = respipe [0];
		368
		369	if (respipe [1] >= 0)
		370	respipe_close (TO_SOCKET (respipe [1]));
		371
		372	#ifdef _WIN32
		373	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		374	#else
		375	if (pipe (respipe))
		376	#endif
		377	croak ("unable to initialize result pipe");
		378
		379	if (old_readfd >= 0)
380	{	380	{
381	aio_req sub;	381	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		382	croak ("unable to initialize result pipe(2)");
382		383
383	for (sub = req->grp_first; sub; sub = sub->grp_next)	384	respipe_close (respipe [0]);
384	req_cancel (sub);	385	respipe [0] = old_readfd;
385	}	386	}
386	}
387		387
		388	#ifdef _WIN32
		389	int arg = 1;
		390	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		391	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		392	#else
		393	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		394	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		395	#endif
		396	croak ("unable to initialize result pipe(3)");
		397
		398	respipe_osf [0] = TO_SOCKET (respipe [0]);
		399	respipe_osf [1] = TO_SOCKET (respipe [1]);
		400	}
		401
		402	static void poll_wait (void)
		403	{
		404	fd_set rfd;
		405
		406	while (eio_nreqs ())
		407	{
		408	int size;
		409
		410	X_LOCK (reslock);
		411	size = res_queue.size;
		412	X_UNLOCK (reslock);
		413
		414	if (size)
		415	return;
		416
		417	etp_maybe_start_thread ();
		418
		419	FD_ZERO (&rfd);
		420	FD_SET (respipe [0], &rfd);
		421
		422	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		423	}
		424	}
		425
388	static int poll_cb ()	426	static int poll_cb (void)
389	{	427	{
390	dSP;
391	int count = 0;
392	int do_croak = 0;
393	aio_req req;
394
395	for (;;)	428	for (;;)
396	{	429	{
397	pthread_mutex_lock (&reslock);	430	int res = eio_poll ();
398	req = ress;
399		431
400	if (req)	432	if (res > 0)
401	{
402	ress = req->next;
403
404	if (!ress)
405	{
406	/* read any signals sent by the worker threads */
407	char buf [32];
408	while (read (respipe [0], buf, 32) == 32)
409	;
410
411	rese = 0;
412	}
413	}
414
415	pthread_mutex_unlock (&reslock);
416
417	if (!req)
418	break;	433	croak (0);
419		434
420	--nreqs;	435	if (!max_outstanding || max_outstanding > eio_nreqs ())
		436	return res;
421		437
422	if (req->type == REQ_QUIT)	438	poll_wait ();
423	started--;
424	else if (req->type == REQ_GROUP && req->length)
425	{
426	req->fd = 1; /* mark request as delayed */
427	continue;
428	}
429	else
430	{
431	if (req->type == REQ_READ)
432	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
433
434	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
435	SvREADONLY_off (req->data);
436
437	if (req->statdata)
438	{
439	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
440	PL_laststatval = req->result;
441	PL_statcache = *(req->statdata);
442	}
443
444	req_invoke (req);
445
446	count++;
447	}
448
449	req_free (req);
450	}	439	}
451
452	return count;
453	}
454
455	static void *aio_proc(void *arg);
456
457	static void start_thread (void)
458	{
459	sigset_t fullsigset, oldsigset;
460	pthread_t tid;
461	pthread_attr_t attr;
462
463	pthread_attr_init (&attr);
464	pthread_attr_setstacksize (&attr, STACKSIZE);
465	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
466
467	sigfillset (&fullsigset);
468	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
469
470	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
471	started++;
472
473	sigprocmask (SIG_SETMASK, &oldsigset, 0);
474	}
475
476	static void req_send (aio_req req)
477	{
478	while (started < wanted && nreqs >= started)
479	start_thread ();
480
481	++nreqs;
482
483	pthread_mutex_lock (&reqlock);
484
485	req->next = 0;
486
487	if (reqe)
488	{
489	reqe->next = req;
490	reqe = req;
491	}
492	else
493	reqe = reqs = req;
494
495	pthread_cond_signal (&reqwait);
496	pthread_mutex_unlock (&reqlock);
497
498	if (nreqs > max_outstanding)
499	for (;;)
500	{
501	poll_cb ();
502
503	if (nreqs <= max_outstanding)
504	break;
505
506	poll_wait ();
507	}
508	}
509
510	static void end_thread (void)
511	{
512	aio_req req;
513	Newz (0, req, 1, aio_cb);
514	req->type = REQ_QUIT;
515
516	req_send (req);
517	}
518
519	static void min_parallel (int nthreads)
520	{
521	if (wanted < nthreads)
522	wanted = nthreads;
523	}
524
525	static void max_parallel (int nthreads)
526	{
527	int cur = started;
528
529	if (wanted > nthreads)
530	wanted = nthreads;
531
532	while (cur > wanted)
533	{
534	end_thread ();
535	cur--;
536	}
537
538	while (started > wanted)
539	{
540	poll_wait ();
541	poll_cb ();
542	}
543	}
544
545	static void create_pipe ()
546	{
547	if (pipe (respipe))
548	croak ("unable to initialize result pipe");
549
550	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
551	croak ("cannot set result pipe to nonblocking mode");
552
553	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
554	croak ("cannot set result pipe to nonblocking mode");
555	}
556
557	/*****************************************************************************/
558	/* work around various missing functions */
559
560	#if !HAVE_PREADWRITE
561	# define pread aio_pread
562	# define pwrite aio_pwrite
563
564	/*
565	* make our pread/pwrite safe against themselves, but not against
566	* normal read/write by using a mutex. slows down execution a lot,
567	* but that's your problem, not mine.
568	*/
569	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
570
571	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
572	{
573	ssize_t res;
574	off_t ooffset;
575
576	pthread_mutex_lock (&preadwritelock);
577	ooffset = lseek (fd, 0, SEEK_CUR);
578	lseek (fd, offset, SEEK_SET);
579	res = read (fd, buf, count);
580	lseek (fd, ooffset, SEEK_SET);
581	pthread_mutex_unlock (&preadwritelock);
582
583	return res;
584	}
585
586	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
587	{
588	ssize_t res;
589	off_t ooffset;
590
591	pthread_mutex_lock (&preadwritelock);
592	ooffset = lseek (fd, 0, SEEK_CUR);
593	lseek (fd, offset, SEEK_SET);
594	res = write (fd, buf, count);
595	lseek (fd, offset, SEEK_SET);
596	pthread_mutex_unlock (&preadwritelock);
597
598	return res;
599	}
600	#endif
601
602	#if !HAVE_FDATASYNC
603	# define fdatasync fsync
604	#endif
605
606	#if !HAVE_READAHEAD
607	# define readahead aio_readahead
608
609	static ssize_t readahead (int fd, off_t offset, size_t count)
610	{
611	dBUF;
612
613	while (count > 0)
614	{
615	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
616
617	pread (fd, aio_buf, len, offset);
618	offset += len;
619	count -= len;
620	}
621
622	fBUF;
623
624	errno = 0;
625	}
626	#endif
627
628	#if !HAVE_READDIR_R
629	# define readdir_r aio_readdir_r
630
631	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
632
633	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
634	{
635	struct dirent *e;
636	int errorno;
637
638	pthread_mutex_lock (&readdirlock);
639
640	e = readdir (dirp);
641	errorno = errno;
642
643	if (e)
644	{
645	*res = ent;
646	strcpy (ent->d_name, e->d_name);
647	}
648	else
649	*res = 0;
650
651	pthread_mutex_unlock (&readdirlock);
652
653	errno = errorno;
654	return e ? 0 : -1;
655	}
656	#endif
657
658	/* sendfile always needs emulation */
659	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
660	{
661	ssize_t res;
662
663	if (!count)
664	return 0;
665
666	#if HAVE_SENDFILE
667	# if __linux
668	res = sendfile (ofd, ifd, &offset, count);
669
670	# elif __freebsd
671	/*
672	* Of course, the freebsd sendfile is a dire hack with no thoughts
673	* wasted on making it similar to other I/O functions.
674	*/
675	{
676	off_t sbytes;
677	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
678
679	if (res < 0 && sbytes)
680	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
681	res = sbytes;
682	}
683
684	# elif __hpux
685	res = sendfile (ofd, ifd, offset, count, 0, 0);
686
687	# elif __solaris
688	{
689	struct sendfilevec vec;
690	size_t sbytes;
691
692	vec.sfv_fd = ifd;
693	vec.sfv_flag = 0;
694	vec.sfv_off = offset;
695	vec.sfv_len = count;
696
697	res = sendfilev (ofd, &vec, 1, &sbytes);
698
699	if (res < 0 && sbytes)
700	res = sbytes;
701	}
702
703	# endif
704	#else
705	res = -1;
706	errno = ENOSYS;
707	#endif
708
709	if (res < 0
710	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
711	#if __solaris
712	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
713	#endif
714	)
715	)
716	{
717	/* emulate sendfile. this is a major pain in the ass */
718	dBUF;
719
720	res = 0;
721
722	while (count)
723	{
724	ssize_t cnt;
725
726	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
727
728	if (cnt <= 0)
729	{
730	if (cnt && !res) res = -1;
731	break;
732	}
733
734	cnt = write (ofd, aio_buf, cnt);
735
736	if (cnt <= 0)
737	{
738	if (cnt && !res) res = -1;
739	break;
740	}
741
742	offset += cnt;
743	res += cnt;
744	count -= cnt;
745	}
746
747	fBUF;
748	}
749
750	return res;
751	}
752
753	/* read a full directory */
754	static int scandir_ (const char *path, void **namesp)
755	{
756	DIR *dirp;
757	union
758	{
759	struct dirent d;
760	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
761	} *u;
762	struct dirent *entp;
763	char *name, *names;
764	int memlen = 4096;
765	int memofs = 0;
766	int res = 0;
767	int errorno;
768
769	dirp = opendir (path);
770	if (!dirp)
771	return -1;
772
773	u = malloc (sizeof (*u));
774	names = malloc (memlen);
775
776	if (u && names)
777	for (;;)
778	{
779	errno = 0;
780	readdir_r (dirp, &u->d, &entp);
781
782	if (!entp)
783	break;
784
785	name = entp->d_name;
786
787	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
788	{
789	int len = strlen (name) + 1;
790
791	res++;
792
793	while (memofs + len > memlen)
794	{
795	memlen *= 2;
796	names = realloc (names, memlen);
797	if (!names)
798	break;
799	}
800
801	memcpy (names + memofs, name, len);
802	memofs += len;
803	}
804	}
805
806	errorno = errno;
807	free (u);
808	closedir (dirp);
809
810	if (errorno)
811	{
812	free (names);
813	errno = errorno;
814	res = -1;
815	}
816
817	*namesp = (void *)names;
818	return res;
819	}
820
821	/*****************************************************************************/
822
823	static void *aio_proc (void *thr_arg)
824	{
825	aio_req req;
826	int type;
827
828	do
829	{
830	pthread_mutex_lock (&reqlock);
831
832	for (;;)
833	{
834	req = reqs;
835
836	if (reqs)
837	{
838	reqs = reqs->next;
839	if (!reqs) reqe = 0;
840	}
841
842	if (req)
843	break;
844
845	pthread_cond_wait (&reqwait, &reqlock);
846	}
847
848	pthread_mutex_unlock (&reqlock);
849
850	errno = 0; /* strictly unnecessary */
851	type = req->type; /* remember type for QUIT check */
852
853	if (!(req->flags & FLAG_CANCELLED))
854	switch (type)
855	{
856	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
857	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
858
859	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
860	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
861
862	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
863	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
864	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
865
866	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
867	case REQ_CLOSE: req->result = close (req->fd); break;
868	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
869	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
870	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
871	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
872	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
873
874	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
875	case REQ_FSYNC: req->result = fsync (req->fd); break;
876	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
877
878	case REQ_SLEEP:
879	{
880	struct timeval tv;
881
882	tv.tv_sec = req->fd;
883	tv.tv_usec = req->fd2;
884
885	req->result = select (0, 0, 0, 0, &tv);
886	}
887
888	case REQ_GROUP:
889	case REQ_NOP:
890	case REQ_QUIT:
891	break;
892
893	default:
894	req->result = ENOSYS;
895	break;
896	}
897
898	req->errorno = errno;
899
900	pthread_mutex_lock (&reslock);
901
902	req->next = 0;
903
904	if (rese)
905	{
906	rese->next = req;
907	rese = req;
908	}
909	else
910	{
911	rese = ress = req;
912
913	/* write a dummy byte to the pipe so fh becomes ready */
914	write (respipe [1], &respipe, 1);
915	}
916
917	pthread_mutex_unlock (&reslock);
918	}
919	while (type != REQ_QUIT);
920
921	return 0;
922	}
923
924	/*****************************************************************************/
925
926	static void atfork_prepare (void)
927	{
928	pthread_mutex_lock (&reqlock);
929	pthread_mutex_lock (&reslock);
930	#if !HAVE_PREADWRITE
931	pthread_mutex_lock (&preadwritelock);
932	#endif
933	#if !HAVE_READDIR_R
934	pthread_mutex_lock (&readdirlock);
935	#endif
936	}
937
938	static void atfork_parent (void)
939	{
940	#if !HAVE_READDIR_R
941	pthread_mutex_unlock (&readdirlock);
942	#endif
943	#if !HAVE_PREADWRITE
944	pthread_mutex_unlock (&preadwritelock);
945	#endif
946	pthread_mutex_unlock (&reslock);
947	pthread_mutex_unlock (&reqlock);
948	}	440	}
949		441
950	static void atfork_child (void)	442	static void atfork_child (void)
951	{	443	{
952	aio_req prv;
953
954	started = 0;
955
956	while (reqs)
957	{
958	prv = reqs;
959	reqs = prv->next;
960	req_free (prv);
961	}
962
963	reqs = reqe = 0;
964
965	while (ress)
966	{
967	prv = ress;
968	ress = prv->next;
969	req_free (prv);
970	}
971
972	ress = rese = 0;
973
974	close (respipe [0]);
975	close (respipe [1]);
976	create_pipe ();	444	create_respipe ();
977
978	atfork_parent ();
979	}	445	}
980		446
981	#define dREQ \	447	#define dREQ \
982	aio_req req; \	448	aio_req req; \
983	int req_pri = next_pri; \	449	int req_pri = next_pri; \
984	next_pri = DEFAULT_PRI + PRI_BIAS; \	450	next_pri = EIO_PRI_DEFAULT; \
985	\	451	\
986	if (SvOK (callback) && !SvROK (callback)) \	452	if (SvOK (callback) && !SvROK (callback)) \
987	croak ("callback must be undef or of reference type"); \	453	croak ("callback must be undef or of reference type"); \
988	\	454	\
989	Newz (0, req, 1, aio_cb); \	455	Newz (0, req, 1, eio_req); \
990	if (!req) \	456	if (!req) \
991	croak ("out of memory during aio_req allocation"); \	457	croak ("out of memory during eio_req allocation"); \
992	\	458	\
993	req->callback = newSVsv (callback); \	459	req->callback = newSVsv (callback); \
994	req->pri = req_pri	460	req->pri = req_pri
995		461
996	#define REQ_SEND \	462	#define REQ_SEND \
997	req_send (req); \	463	req_submit (req); \
998	\	464	\
999	if (GIMME_V != G_VOID) \	465	if (GIMME_V != G_VOID) \
1000	XPUSHs (req_sv (req, AIO_REQ_KLASS));	466	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1001		467
1002	MODULE = IO::AIO PACKAGE = IO::AIO	468	MODULE = IO::AIO PACKAGE = IO::AIO
1003		469
1004	PROTOTYPES: ENABLE	470	PROTOTYPES: ENABLE
1005		471
1006	BOOT:	472	BOOT:
1007	{	473	{
1008	HV *stash = gv_stashpv ("IO::AIO", 1);	474	stash = gv_stashpv ("IO::AIO", 1);
		475
1009	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	476	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1010	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	477	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1011	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	478	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		479	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		480	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		481	#ifndef _WIN32
		482	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		483	#endif
1012		484
1013	create_pipe ();	485	create_respipe ();
1014	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1015	}
1016		486
		487	if (eio_init (want_poll, done_poll) < 0)
		488	croak ("IO::AIO: unable to initialise eio library");
		489
		490	/* atfork child called in fifo order, so before eio's handler */
		491	X_THREAD_ATFORK (0, 0, atfork_child);
		492	}
		493
1017	void	494	void
1018	min_parallel (nthreads)	495	max_poll_reqs (int nreqs)
1019	int nthreads
1020	PROTOTYPE: $	496	PROTOTYPE: $
		497	CODE:
		498	eio_set_max_poll_reqs (nreqs);
1021		499
1022	void	500	void
1023	max_parallel (nthreads)	501	max_poll_time (double nseconds)
1024	int nthreads
1025	PROTOTYPE: $	502	PROTOTYPE: $
1026
1027	int
1028	max_outstanding (nreqs)
1029	int nreqs
1030	PROTOTYPE: $
1031	CODE:	503	CODE:
1032	RETVAL = max_outstanding;	504	eio_set_max_poll_time (nseconds);
		505
		506	void
		507	min_parallel (int nthreads)
		508	PROTOTYPE: $
		509	CODE:
		510	eio_set_min_parallel (nthreads);
		511
		512	void
		513	max_parallel (int nthreads)
		514	PROTOTYPE: $
		515	CODE:
		516	eio_set_max_parallel (nthreads);
		517
		518	void
		519	max_idle (int nthreads)
		520	PROTOTYPE: $
		521	CODE:
		522	eio_set_max_idle (nthreads);
		523
		524	void
		525	max_outstanding (int maxreqs)
		526	PROTOTYPE: $
		527	CODE:
1033	max_outstanding = nreqs;	528	max_outstanding = maxreqs;
1034		529
1035	void	530	void
1036	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	531	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1037	SV * pathname
1038	int flags
1039	int mode
1040	SV * callback
1041	PROTOTYPE: $$$;$	532	PROTOTYPE: $$$;$
1042	PPCODE:	533	PPCODE:
1043	{	534	{
1044	dREQ;	535	dREQ;
1045		536
1046	req->type = REQ_OPEN;	537	req->type = EIO_OPEN;
1047	req->data = newSVsv (pathname);	538	req->sv1 = newSVsv (pathname);
1048	req->dataptr = SvPVbyte_nolen (req->data);	539	req->ptr1 = SvPVbyte_nolen (req->sv1);
1049	req->fd = flags;	540	req->int1 = flags;
1050	req->mode = mode;	541	req->int2 = mode;
1051		542
1052	REQ_SEND;	543	REQ_SEND;
1053	}	544	}
1054		545
1055	void	546	void
1056	aio_close (fh,callback=&PL_sv_undef)	547	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1057	SV * fh
1058	SV * callback
1059	PROTOTYPE: $;$	548	PROTOTYPE: $;$
1060	ALIAS:	549	ALIAS:
1061	aio_close = REQ_CLOSE
1062	aio_fsync = REQ_FSYNC	550	aio_fsync = EIO_FSYNC
1063	aio_fdatasync = REQ_FDATASYNC	551	aio_fdatasync = EIO_FDATASYNC
1064	PPCODE:	552	PPCODE:
1065	{	553	{
1066	dREQ;	554	dREQ;
1067		555
1068	req->type = ix;	556	req->type = ix;
1069	req->fh = newSVsv (fh);	557	req->sv1 = newSVsv (fh);
1070	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	558	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1071		559
1072	REQ_SEND (req);	560	REQ_SEND (req);
1073	}	561	}
1074		562
1075	void	563	void
		564	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		565	PROTOTYPE: $;$
		566	PPCODE:
		567	{
		568	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		569	dREQ;
		570
		571	if (close_pipe < 0)
		572	{
		573	int pipefd [2];
		574
		575	if (pipe (pipefd) < 0
		576	|| close (pipefd [1]) < 0
		577	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		578	abort (); /*D*/
		579
		580	close_pipe = pipefd [0];
		581	}
		582
		583	req->type = EIO_DUP2;
		584	req->int1 = close_pipe;
		585	req->sv2 = newSVsv (fh);
		586	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		587
		588	REQ_SEND (req);
		589	}
		590
		591	void
1076	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	592	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1077	SV * fh
1078	UV offset
1079	UV length
1080	SV * data
1081	UV dataoffset
1082	SV * callback
1083	ALIAS:	593	ALIAS:
1084	aio_read = REQ_READ	594	aio_read = EIO_READ
1085	aio_write = REQ_WRITE	595	aio_write = EIO_WRITE
1086	PROTOTYPE: $$$$$;$	596	PROTOTYPE: $$$$$;$
1087	PPCODE:	597	PPCODE:
1088	{	598	{
1089	aio_req req;
1090	STRLEN svlen;	599	STRLEN svlen;
1091	char *svptr = SvPVbyte (data, svlen);	600	char *svptr = SvPVbyte (data, svlen);
		601	UV len = SvUV (length);
1092		602
1093	SvUPGRADE (data, SVt_PV);	603	SvUPGRADE (data, SVt_PV);
1094	SvPOK_on (data);	604	SvPOK_on (data);
1095		605
1096	if (dataoffset < 0)	606	if (dataoffset < 0)
1097	dataoffset += svlen;	607	dataoffset += svlen;
1098		608
1099	if (dataoffset < 0 || dataoffset > svlen)	609	if (dataoffset < 0 || dataoffset > svlen)
1100	croak ("data offset outside of string");	610	croak ("dataoffset outside of data scalar");
1101		611
1102	if (ix == REQ_WRITE)	612	if (ix == EIO_WRITE)
1103	{	613	{
1104	/* write: check length and adjust. */	614	/* write: check length and adjust. */
1105	if (length < 0 || length + dataoffset > svlen)	615	if (!SvOK (length) || len + dataoffset > svlen)
1106	length = svlen - dataoffset;	616	len = svlen - dataoffset;
1107	}	617	}
1108	else	618	else
1109	{	619	{
1110	/* read: grow scalar as necessary */	620	/* read: grow scalar as necessary */
1111	svptr = SvGROW (data, length + dataoffset);	621	svptr = SvGROW (data, len + dataoffset + 1);
1112	}	622	}
1113		623
1114	if (length < 0)	624	if (len < 0)
1115	croak ("length must not be negative");	625	croak ("length must not be negative");
1116		626
1117	{	627	{
1118	dREQ;	628	dREQ;
1119		629
1120	req->type = ix;	630	req->type = ix;
1121	req->fh = newSVsv (fh);	631	req->sv1 = newSVsv (fh);
1122	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	632	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1123	: IoOFP (sv_2io (fh)));	633	: IoOFP (sv_2io (fh)));
		634	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1124	req->offset = offset;	635	req->size = len;
1125	req->length = length;
1126	req->data = SvREFCNT_inc (data);	636	req->sv2 = SvREFCNT_inc (data);
1127	req->dataptr = (char *)svptr + dataoffset;	637	req->ptr2 = (char *)svptr + dataoffset;
		638	req->stroffset = dataoffset;
1128		639
1129	if (!SvREADONLY (data))	640	if (!SvREADONLY (data))
1130	{	641	{
1131	SvREADONLY_on (data);	642	SvREADONLY_on (data);
1132	req->data2ptr = (void *)data;	643	req->flags |= FLAG_SV2_RO_OFF;
1133	}	644	}
1134		645
1135	REQ_SEND;	646	REQ_SEND;
1136	}	647	}
1137	}	648	}
1138		649
1139	void	650	void
		651	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		652	PROTOTYPE: $$;$
		653	PPCODE:
		654	{
		655	SV *data;
		656	dREQ;
		657
		658	req->type = EIO_READLINK;
		659	req->sv1 = newSVsv (path);
		660	req->ptr1 = SvPVbyte_nolen (req->sv1);
		661
		662	REQ_SEND;
		663	}
		664
		665	void
1140	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	666	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1141	SV * out_fh
1142	SV * in_fh
1143	UV in_offset
1144	UV length
1145	SV * callback
1146	PROTOTYPE: $$$$;$	667	PROTOTYPE: $$$$;$
1147	PPCODE:	668	PPCODE:
1148	{	669	{
1149	dREQ;	670	dREQ;
1150		671
1151	req->type = REQ_SENDFILE;	672	req->type = EIO_SENDFILE;
1152	req->fh = newSVsv (out_fh);	673	req->sv1 = newSVsv (out_fh);
1153	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	674	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1154	req->fh2 = newSVsv (in_fh);	675	req->sv2 = newSVsv (in_fh);
1155	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	676	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1156	req->offset = in_offset;	677	req->offs = SvVAL64 (in_offset);
1157	req->length = length;	678	req->size = length;
1158		679
1159	REQ_SEND;	680	REQ_SEND;
1160	}	681	}
1161		682
1162	void	683	void
1163	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	684	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1164	SV * fh
1165	UV offset
1166	IV length
1167	SV * callback
1168	PROTOTYPE: $$$;$	685	PROTOTYPE: $$$;$
1169	PPCODE:	686	PPCODE:
1170	{	687	{
1171	dREQ;	688	dREQ;
1172		689
1173	req->type = REQ_READAHEAD;	690	req->type = EIO_READAHEAD;
1174	req->fh = newSVsv (fh);	691	req->sv1 = newSVsv (fh);
1175	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	692	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1176	req->offset = offset;	693	req->offs = SvVAL64 (offset);
1177	req->length = length;	694	req->size = length;
1178		695
1179	REQ_SEND;	696	REQ_SEND;
1180	}	697	}
1181		698
1182	void	699	void
1183	aio_stat (fh_or_path,callback=&PL_sv_undef)	700	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1184	SV * fh_or_path
1185	SV * callback
1186	ALIAS:	701	ALIAS:
1187	aio_stat = REQ_STAT	702	aio_stat = EIO_STAT
1188	aio_lstat = REQ_LSTAT	703	aio_lstat = EIO_LSTAT
1189	PPCODE:	704	PPCODE:
1190	{	705	{
1191	dREQ;	706	dREQ;
1192		707
1193	New (0, req->statdata, 1, Stat_t);	708	req->sv1 = newSVsv (fh_or_path);
1194	if (!req->statdata)
1195	{
1196	req_free (req);
1197	croak ("out of memory during aio_req->statdata allocation");
1198	}
1199		709
1200	if (SvPOK (fh_or_path))	710	if (SvPOK (req->sv1))
1201	{	711	{
1202	req->type = ix;	712	req->type = ix;
1203	req->data = newSVsv (fh_or_path);
1204	req->dataptr = SvPVbyte_nolen (req->data);	713	req->ptr1 = SvPVbyte_nolen (req->sv1);
1205	}	714	}
1206	else	715	else
1207	{	716	{
1208	req->type = REQ_FSTAT;	717	req->type = EIO_FSTAT;
1209	req->fh = newSVsv (fh_or_path);
1210	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	718	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1211	}	719	}
1212		720
1213	REQ_SEND;	721	REQ_SEND;
1214	}	722	}
1215		723
1216	void	724	void
		725	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		726	PPCODE:
		727	{
		728	dREQ;
		729
		730	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		731	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		732	req->sv1 = newSVsv (fh_or_path);
		733
		734	if (SvPOK (req->sv1))
		735	{
		736	req->type = EIO_UTIME;
		737	req->ptr1 = SvPVbyte_nolen (req->sv1);
		738	}
		739	else
		740	{
		741	req->type = EIO_FUTIME;
		742	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		743	}
		744
		745	REQ_SEND;
		746	}
		747
		748	void
		749	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		750	PPCODE:
		751	{
		752	dREQ;
		753
		754	req->sv1 = newSVsv (fh_or_path);
		755	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		756
		757	if (SvPOK (req->sv1))
		758	{
		759	req->type = EIO_TRUNCATE;
		760	req->ptr1 = SvPVbyte_nolen (req->sv1);
		761	}
		762	else
		763	{
		764	req->type = EIO_FTRUNCATE;
		765	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		766	}
		767
		768	REQ_SEND;
		769	}
		770
		771	void
		772	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		773	ALIAS:
		774	aio_chmod = EIO_CHMOD
		775	aio_mkdir = EIO_MKDIR
		776	PPCODE:
		777	{
		778	dREQ;
		779
		780	req->int2 = mode;
		781	req->sv1 = newSVsv (fh_or_path);
		782
		783	if (SvPOK (req->sv1))
		784	{
		785	req->type = ix;
		786	req->ptr1 = SvPVbyte_nolen (req->sv1);
		787	}
		788	else
		789	{
		790	req->type = EIO_FCHMOD;
		791	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		792	}
		793
		794	REQ_SEND;
		795	}
		796
		797	void
		798	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		799	PPCODE:
		800	{
		801	dREQ;
		802
		803	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		804	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		805	req->sv1 = newSVsv (fh_or_path);
		806
		807	if (SvPOK (req->sv1))
		808	{
		809	req->type = EIO_CHOWN;
		810	req->ptr1 = SvPVbyte_nolen (req->sv1);
		811	}
		812	else
		813	{
		814	req->type = EIO_FCHOWN;
		815	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		816	}
		817
		818	REQ_SEND;
		819	}
		820
		821	void
1217	aio_unlink (pathname,callback=&PL_sv_undef)	822	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1218	SV * pathname
1219	SV * callback
1220	ALIAS:	823	ALIAS:
1221	aio_unlink = REQ_UNLINK	824	aio_unlink = EIO_UNLINK
1222	aio_rmdir = REQ_RMDIR	825	aio_rmdir = EIO_RMDIR
1223	aio_readdir = REQ_READDIR	826	aio_readdir = EIO_READDIR
1224	PPCODE:	827	PPCODE:
1225	{	828	{
1226	dREQ;	829	dREQ;
1227		830
1228	req->type = ix;	831	req->type = ix;
1229	req->data = newSVsv (pathname);	832	req->sv1 = newSVsv (pathname);
1230	req->dataptr = SvPVbyte_nolen (req->data);	833	req->ptr1 = SvPVbyte_nolen (req->sv1);
		834
		835	REQ_SEND;
		836	}
		837
		838	void
		839	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		840	ALIAS:
		841	aio_link = EIO_LINK
		842	aio_symlink = EIO_SYMLINK
		843	aio_rename = EIO_RENAME
		844	PPCODE:
		845	{
		846	dREQ;
		847
		848	req->type = ix;
		849	req->sv1 = newSVsv (oldpath);
		850	req->ptr1 = SvPVbyte_nolen (req->sv1);
		851	req->sv2 = newSVsv (newpath);
		852	req->ptr2 = SvPVbyte_nolen (req->sv2);
1231		853
1232	REQ_SEND;	854	REQ_SEND;
1233	}	855	}
1234		856
1235	void	857	void
1236	aio_link (oldpath,newpath,callback=&PL_sv_undef)	858	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1237	SV * oldpath
1238	SV * newpath
1239	SV * callback
1240	ALIAS:
1241	aio_link = REQ_LINK
1242	aio_symlink = REQ_SYMLINK
1243	aio_rename = REQ_RENAME
1244	PPCODE:	859	PPCODE:
1245	{	860	{
1246	dREQ;	861	dREQ;
1247		862
1248	req->type = ix;	863	req->type = EIO_MKNOD;
1249	req->fh = newSVsv (oldpath);	864	req->sv1 = newSVsv (pathname);
1250	req->data2ptr = SvPVbyte_nolen (req->fh);	865	req->ptr1 = SvPVbyte_nolen (req->sv1);
1251	req->data = newSVsv (newpath);	866	req->int2 = (mode_t)mode;
1252	req->dataptr = SvPVbyte_nolen (req->data);	867	req->offs = dev;
1253		868
1254	REQ_SEND;	869	REQ_SEND;
1255	}	870	}
1256		871
1257	void	872	void
1258	aio_sleep (delay,callback=&PL_sv_undef)	873	aio_busy (double delay, SV *callback=&PL_sv_undef)
1259	double delay
1260	SV * callback
1261	PPCODE:	874	PPCODE:
1262	{	875	{
1263	dREQ;	876	dREQ;
1264		877
1265	req->type = REQ_SLEEP;	878	req->type = EIO_BUSY;
1266	req->fd = delay < 0. ? 0 : delay;	879	req->nv1 = delay < 0. ? 0. : delay;
1267	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1268		880
1269	REQ_SEND;	881	REQ_SEND;
1270	}	882	}
1271		883
1272	void	884	void
1273	aio_group (callback=&PL_sv_undef)	885	aio_group (SV *callback=&PL_sv_undef)
1274	SV * callback
1275	PROTOTYPE: ;$	886	PROTOTYPE: ;$
1276	PPCODE:	887	PPCODE:
1277	{	888	{
1278	dREQ;	889	dREQ;
1279		890
1280	req->type = REQ_GROUP;	891	req->type = EIO_GROUP;
		892
1281	req_send (req);	893	eio_submit (req);
1282
1283	XPUSHs (req_sv (req, AIO_GRP_KLASS));	894	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1284	}	895	}
1285		896
1286	void	897	void
1287	aio_nop (callback=&PL_sv_undef)	898	aio_nop (SV *callback=&PL_sv_undef)
1288	SV * callback	899	ALIAS:
		900	aio_nop = EIO_NOP
		901	aio_sync = EIO_SYNC
1289	PPCODE:	902	PPCODE:
1290	{	903	{
1291	dREQ;	904	dREQ;
1292		905
1293	req->type = REQ_NOP;	906	req->type = ix;
1294		907
1295	REQ_SEND;	908	REQ_SEND;
1296	}	909	}
1297		910
1298	#if 0	911	int
1299		912	aioreq_pri (int pri = 0)
1300	void	913	PROTOTYPE: ;$
1301	aio_pri (int pri = DEFAULT_PRI)
1302	CODE:	914	CODE:
		915	RETVAL = next_pri;
		916	if (items > 0)
		917	{
1303	if (pri < PRI_MIN) pri = PRI_MIN;	918	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1304	if (pri > PRI_MAX) pri = PRI_MAX;	919	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1305	next_pri = pri + PRI_BIAS;	920	next_pri = pri;
		921	}
		922	OUTPUT:
		923	RETVAL
1306		924
1307	#endif	925	void
		926	aioreq_nice (int nice = 0)
		927	CODE:
		928	nice = next_pri - nice;
		929	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		930	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		931	next_pri = nice;
1308		932
1309	void	933	void
1310	flush ()	934	flush ()
1311	PROTOTYPE:	935	PROTOTYPE:
1312	CODE:	936	CODE:
1313	while (nreqs)	937	while (eio_nreqs ())
1314	{	938	{
1315	poll_wait ();	939	poll_wait ();
1316	poll_cb ();	940	poll_cb ();
1317	}	941	}
1318		942
1319	void	943	int
1320	poll()	944	poll()
1321	PROTOTYPE:	945	PROTOTYPE:
1322	CODE:	946	CODE:
1323	if (nreqs)
1324	{
1325	poll_wait ();	947	poll_wait ();
1326	poll_cb ();	948	RETVAL = poll_cb ();
1327	}	949	OUTPUT:
		950	RETVAL
1328		951
1329	int	952	int
1330	poll_fileno()	953	poll_fileno()
1331	PROTOTYPE:	954	PROTOTYPE:
1332	CODE:	955	CODE:
…		…
1344		967
1345	void	968	void
1346	poll_wait()	969	poll_wait()
1347	PROTOTYPE:	970	PROTOTYPE:
1348	CODE:	971	CODE:
1349	if (nreqs)
1350	poll_wait ();	972	poll_wait ();
1351		973
1352	int	974	int
1353	nreqs()	975	nreqs()
1354	PROTOTYPE:	976	PROTOTYPE:
1355	CODE:	977	CODE:
1356	RETVAL = nreqs;	978	RETVAL = eio_nreqs ();
1357	OUTPUT:	979	OUTPUT:
1358	RETVAL	980	RETVAL
1359		981
		982	int
		983	nready()
		984	PROTOTYPE:
		985	CODE:
		986	RETVAL = eio_nready ();
		987	OUTPUT:
		988	RETVAL
		989
		990	int
		991	npending()
		992	PROTOTYPE:
		993	CODE:
		994	RETVAL = eio_npending ();
		995	OUTPUT:
		996	RETVAL
		997
		998	int
		999	nthreads()
		1000	PROTOTYPE:
		1001	CODE:
		1002	RETVAL = eio_nthreads ();
		1003	OUTPUT:
		1004	RETVAL
		1005
		1006	void _on_next_submit (SV *cb)
		1007	CODE:
		1008	SvREFCNT_dec (on_next_submit);
		1009	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1010
1360	PROTOTYPES: DISABLE	1011	PROTOTYPES: DISABLE
1361		1012
1362	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1013	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1363		1014
1364	void	1015	void
1365	cancel (aio_req_ornot req)	1016	cancel (aio_req_ornot req)
1366	CODE:	1017	CODE:
1367	req_cancel (req);	1018	eio_cancel (req);
1368		1019
1369	void	1020	void
1370	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1021	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1371	CODE:	1022	CODE:
1372	SvREFCNT_dec (req->callback);	1023	SvREFCNT_dec (req->callback);
…		…
1377	void	1028	void
1378	add (aio_req grp, ...)	1029	add (aio_req grp, ...)
1379	PPCODE:	1030	PPCODE:
1380	{	1031	{
1381	int i;	1032	int i;
1382	aio_req req;
1383		1033
1384	if (grp->fd == 2)	1034	if (grp->int1 == 2)
1385	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1035	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1386		1036
1387	for (i = 1; i < items; ++i )	1037	for (i = 1; i < items; ++i )
1388	{	1038	{
		1039	aio_req req;
		1040
1389	if (GIMME_V != G_VOID)	1041	if (GIMME_V != G_VOID)
1390	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1042	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1391		1043
1392	req = SvAIO_REQ (ST (i));	1044	req = SvAIO_REQ (ST (i));
1393		1045
1394	if (req)	1046	if (req)
1395	{	1047	eio_grp_add (grp, req);
1396	++grp->length;
1397	req->grp = grp;
1398
1399	req->grp_prev = 0;
1400	req->grp_next = grp->grp_first;
1401
1402	if (grp->grp_first)
1403	grp->grp_first->grp_prev = req;
1404
1405	grp->grp_first = req;
1406	}	1048	}
1407	}
1408	}	1049	}
		1050
		1051	void
		1052	cancel_subs (aio_req_ornot req)
		1053	CODE:
		1054	req_cancel_subs (req);
1409		1055
1410	void	1056	void
1411	result (aio_req grp, ...)	1057	result (aio_req grp, ...)
1412	CODE:	1058	CODE:
1413	{	1059	{
1414	int i;	1060	int i;
		1061	AV *av;
		1062
		1063	grp->errorno = errno;
		1064
1415	AV *av = newAV ();	1065	av = newAV ();
1416		1066
1417	for (i = 1; i < items; ++i )	1067	for (i = 1; i < items; ++i )
1418	av_push (av, newSVsv (ST (i)));	1068	av_push (av, newSVsv (ST (i)));
1419		1069
1420	SvREFCNT_dec (grp->data);	1070	SvREFCNT_dec (grp->sv1);
1421	grp->data = (SV *)av;	1071	grp->sv1 = (SV *)av;
1422	}	1072	}
1423		1073
1424	void	1074	void
		1075	errno (aio_req grp, int errorno = errno)
		1076	CODE:
		1077	grp->errorno = errorno;
		1078
		1079	void
1425	feed_limit (aio_req grp, int limit)	1080	limit (aio_req grp, int limit)
1426	CODE:	1081	CODE:
1427	grp->fd2 = limit;	1082	eio_grp_limit (grp, limit);
1428	aio_grp_feed (grp);
1429		1083
1430	void	1084	void
1431	feed (aio_req grp, SV *callback=&PL_sv_undef)	1085	feed (aio_req grp, SV *callback=&PL_sv_undef)
1432	CODE:	1086	CODE:
1433	{	1087	{
1434	SvREFCNT_dec (grp->fh2);	1088	SvREFCNT_dec (grp->sv2);
1435	grp->fh2 = newSVsv (callback);	1089	grp->sv2 = newSVsv (callback);
1436		1090
1437	if (grp->fd2 <= 0)	1091	if (grp->int2 <= 0)
1438	grp->fd2 = 2;	1092	grp->int2 = 2;
1439		1093
1440	aio_grp_feed (grp);	1094	eio_grp_limit (grp, grp->int2);
1441	}	1095	}
1442		1096

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