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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.59 by root, Mon Oct 23 18:56:27 2006 UTC vs.
Revision 1.122 by root, Tue May 13 19:35:16 2008 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"
9
10	#include <pthread.h>
11
12	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
13	#include <errno.h>	11	#include <errno.h>
14	#include <sys/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	12	#include <sys/types.h>
17	#include <sys/stat.h>	13	#include <sys/stat.h>
18	#include <limits.h>	14	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	15	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	16	#include <sched.h>
23		17
24	#if HAVE_SENDFILE	18	/* perl namespace pollution */
25	# if __linux	19	#undef VERSION
26	# include <sys/sendfile.h>	20
27	# elif __freebsd	21	#ifdef _WIN32
28	# include <sys/socket.h>	22
29	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
30	# elif __hpux	24	# undef malloc
31	# include <sys/socket.h>	25	# undef free
32	# elif __solaris /* not yet */	26
33	# include <sys/sendfile.h>	27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
34	# else	59	#else
35	# error sendfile support requested but not available	60
36	# endif	61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
37	#endif	68	#endif
38		69
39	/* used for struct dirent, AIX doesn't provide it */	70	#define EIO_STRUCT_STAT Stat_t
40	#ifndef NAME_MAX	71
41	# 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
42	#endif	77	#endif
43		78
44	#if __ia64	79	static HV *stash;
45	# define STACKSIZE 65536	80	typedef SV SV8; /* byte-sv, used for argument-checking */
46	#else
47	# define STACKSIZE 8192
48	#endif
49
50	enum {
51	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,
60	REQ_GROUP, REQ_NOP,
61	REQ_SLEEP,
62	};
63		81
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	82	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	83	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		84
67	typedef struct aio_cb	85	#define EIO_REQ_MEMBERS \
68	{
69	struct aio_cb *volatile next;
70
71	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72
73	SV *self; /* the perl counterpart of this request, if any */
74
75	SV *data, *callback;	86	SV *callback; \
76	SV *fh, *fh2;	87	SV *sv1, *sv2; \
77	void *dataptr, *data2ptr;
78	Stat_t *statdata;
79	off_t offset;
80	size_t length;
81	ssize_t result;
82
83	int type;
84	int fd, fd2;
85	int errorno;
86	STRLEN dataoffset;	88	STRLEN stroffset; \
87	mode_t mode; /* open */	89	SV *self;
88	unsigned char pri;	90
89	unsigned char flags;	91	#define EIO_NO_WRAPPERS 1
90	} aio_cb;	92
		93	#include "libeio/eio.h"
		94
		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)
91		101
92	enum {	102	enum {
93	FLAG_CANCELLED = 0x01,	103	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
94	};	104	};
95		105
		106	#include "libeio/eio.c"
		107
96	typedef aio_cb *aio_req;	108	typedef eio_req *aio_req;
97	typedef aio_cb *aio_req_ornot;	109	typedef eio_req *aio_req_ornot;
98		110
99	static int started, wanted;	111	static SV *on_next_submit;
100	static volatile int nreqs;	112	static int next_pri = EIO_PRI_DEFAULT;
101	static int max_outstanding = 1<<30;	113	static int max_outstanding;
102	static int respipe [2];
103		114
104	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	115	static int respipe_osf [2], respipe [2] = { -1, -1 };
105	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
106	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
107		116
108	static volatile aio_req reqs, reqe; /* queue start, queue end */	117	static void req_destroy (aio_req req);
109	static volatile aio_req ress, rese; /* queue start, queue end */
110
111	static void req_invoke (aio_req req);	118	static void req_cancel (aio_req req);
112	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	}
113		133
114	/* must be called at most once */	134	/* must be called at most once */
115	static SV *req_sv (aio_req req, const char *klass)	135	static SV *req_sv (aio_req req, const char *klass)
116	{	136	{
117	if (!req->self)	137	if (!req->self)
…		…
135	return mg ? (aio_req)mg->mg_ptr : 0;	155	return mg ? (aio_req)mg->mg_ptr : 0;
136	}	156	}
137		157
138	static void aio_grp_feed (aio_req grp)	158	static void aio_grp_feed (aio_req grp)
139	{	159	{
140	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	160	if (grp->sv2 && SvOK (grp->sv2))
141	{	161	{
142	int old_len = grp->length;	162	dSP;
143		163
144	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)
145	{	208	{
146	dSP;	209	case EIO_READDIR:
		210	{
		211	SV *rv = &PL_sv_undef;
147		212
148	ENTER;	213	if (req->result >= 0)
149	SAVETMPS;	214	{
150	PUSHMARK (SP);	215	int i;
151	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	216	char *buf = req->ptr2;
152	PUTBACK;	217	AV *av = newAV ();
153	call_sv (grp->fh2, G_VOID | G_EVAL);	218
154	SPAGAIN;	219	av_extend (av, req->result - 1);
155	FREETMPS;	220
156	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;
157	}	313	}
158		314
159	/* stop if no progress has been made */	315	errno = req->errorno;
160	if (old_len == grp->length)	316
161	{	317	PUTBACK;
162	SvREFCNT_dec (grp->fh2);	318	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
163	grp->fh2 = 0;	319	SPAGAIN;
164	break;	320
165	}	321	FREETMPS;
		322	LEAVE;
		323
		324	PUTBACK;
166	}	325	}
167	}
168		326
169	static void aio_grp_dec (aio_req grp)	327	return !!SvTRUE (ERRSV);
170	{
171	--grp->length;
172
173	/* call feeder, if applicable */
174	aio_grp_feed (grp);
175
176	/* finish, if done */
177	if (!grp->length && grp->fd)
178	{
179	req_invoke (grp);
180	req_free (grp);
181	}
182	}	328	}
183		329
184	static void poll_wait ()
185	{
186	if (nreqs && !ress)
187	{
188	fd_set rfd;
189	FD_ZERO(&rfd);
190	FD_SET(respipe [0], &rfd);
191
192	select (respipe [0] + 1, &rfd, 0, 0, 0);
193	}
194	}
195
196	static void req_invoke (aio_req req)
197	{
198	dSP;
199	int errorno = errno;
200
201	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
202	return;
203
204	errno = req->errorno;
205
206	ENTER;
207	SAVETMPS;
208	PUSHMARK (SP);
209	EXTEND (SP, 1);
210
211	switch (req->type)
212	{
213	case REQ_READDIR:
214	{
215	SV *rv = &PL_sv_undef;
216
217	if (req->result >= 0)
218	{
219	char *buf = req->data2ptr;
220	AV *av = newAV ();
221
222	while (req->result)
223	{
224	SV *sv = newSVpv (buf, 0);
225
226	av_push (av, sv);
227	buf += SvCUR (sv) + 1;
228	req->result--;
229	}
230
231	rv = sv_2mortal (newRV_noinc ((SV *)av));
232	}
233
234	PUSHs (rv);
235	}
236	break;
237
238	case REQ_OPEN:
239	{
240	/* convert fd to fh */
241	SV *fh;
242
243	PUSHs (sv_2mortal (newSViv (req->result)));
244	PUTBACK;
245	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
246	SPAGAIN;
247
248	fh = SvREFCNT_inc (POPs);
249
250	PUSHMARK (SP);
251	XPUSHs (sv_2mortal (fh));
252	}
253	break;
254
255	case REQ_GROUP:
256	req->fd = 2; /* mark group as finished */
257
258	if (req->data)
259	{
260	int i;
261	AV *av = (AV *)req->data;
262
263	EXTEND (SP, AvFILL (av) + 1);
264	for (i = 0; i <= AvFILL (av); ++i)
265	PUSHs (*av_fetch (av, i, 0));
266	}
267	break;
268
269	case REQ_NOP:
270	case REQ_SLEEP:
271	break;
272
273	default:
274	PUSHs (sv_2mortal (newSViv (req->result)));
275	break;
276	}
277
278
279	PUTBACK;
280	call_sv (req->callback, G_VOID | G_EVAL);
281	SPAGAIN;
282
283	FREETMPS;
284	LEAVE;
285
286	errno = errorno;
287
288	if (SvTRUE (ERRSV))
289	{
290	req_free (req);
291	croak (0);
292	}
293	}
294
295	static void req_free (aio_req req)	330	static void req_destroy (aio_req req)
296	{	331	{
297	if (req->grp)
298	{
299	aio_req grp = req->grp;
300
301	/* unlink request */
302	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
303	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
304
305	if (grp->grp_first == req)
306	grp->grp_first = req->grp_next;
307
308	aio_grp_dec (grp);
309	}
310
311	if (req->self)	332	if (req->self)
312	{	333	{
313	sv_unmagic (req->self, PERL_MAGIC_ext);	334	sv_unmagic (req->self, PERL_MAGIC_ext);
314	SvREFCNT_dec (req->self);	335	SvREFCNT_dec (req->self);
315	}	336	}
316		337
317	SvREFCNT_dec (req->data);
318	SvREFCNT_dec (req->fh);	338	SvREFCNT_dec (req->sv1);
319	SvREFCNT_dec (req->fh2);	339	SvREFCNT_dec (req->sv2);
320	SvREFCNT_dec (req->callback);	340	SvREFCNT_dec (req->callback);
321	Safefree (req->statdata);
322
323	if (req->type == REQ_READDIR && req->result >= 0)
324	free (req->data2ptr);
325		341
326	Safefree (req);	342	Safefree (req);
327	}	343	}
328		344
329	static void req_cancel (aio_req req)	345	static void req_cancel_subs (aio_req grp)
330	{	346	{
331	req->flags |= FLAG_CANCELLED;	347	aio_req sub;
332		348
333	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)
334	{	380	{
335	aio_req sub;	381	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		382	croak ("unable to initialize result pipe(2)");
336		383
337	for (sub = req->grp_first; sub; sub = sub->grp_next)	384	respipe_close (respipe [0]);
338	req_cancel (sub);	385	respipe [0] = old_readfd;
339	}	386	}
340	}
341		387
342	static int poll_cb ()	388	#ifdef _WIN32
343	{	389	int arg = 1;
344	dSP;	390	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
345	int count = 0;	391	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
346	int do_croak = 0;	392	#else
347	aio_req req;	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)");
348		397
349	for (;;)	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 ())
350	{	407	{
351	pthread_mutex_lock (&reslock);	408	int size;
352	req = ress;
353		409
		410	X_LOCK (reslock);
		411	size = res_queue.size;
		412	X_UNLOCK (reslock);
		413
354	if (req)	414	if (size)
355	{
356	ress = req->next;
357
358	if (!ress)
359	{
360	/* read any signals sent by the worker threads */
361	char buf [32];
362	while (read (respipe [0], buf, 32) == 32)
363	;
364
365	rese = 0;
366	}
367	}
368
369	pthread_mutex_unlock (&reslock);
370
371	if (!req)
372	break;	415	return;
373		416
374	--nreqs;	417	maybe_start_thread ();
375		418
376	if (req->type == REQ_QUIT)	419	FD_ZERO (&rfd);
377	started--;	420	FD_SET (respipe [0], &rfd);
378	else if (req->type == REQ_GROUP && req->length)
379	{
380	req->fd = 1; /* mark request as delayed */
381	continue;
382	}
383	else
384	{
385	if (req->type == REQ_READ)
386	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
387		421
388	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))	422	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
389	SvREADONLY_off (req->data);
390
391	if (req->statdata)
392	{
393	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
394	PL_laststatval = req->result;
395	PL_statcache = *(req->statdata);
396	}
397
398	req_invoke (req);
399
400	count++;
401	}
402
403	req_free (req);
404	}	423	}
405
406	return count;
407	}	424	}
408		425
409	static void *aio_proc(void *arg);	426	static int poll_cb (void)
410
411	static void start_thread (void)
412	{	427	{
413	sigset_t fullsigset, oldsigset;	428	int res;
414	pthread_t tid;
415	pthread_attr_t attr;
416		429
417	pthread_attr_init (&attr);	430	do
418	pthread_attr_setstacksize (&attr, STACKSIZE);
419	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
420
421	sigfillset (&fullsigset);
422	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
423
424	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
425	started++;
426
427	sigprocmask (SIG_SETMASK, &oldsigset, 0);
428	}
429
430	static void req_send (aio_req req)
431	{
432	while (started < wanted && nreqs >= started)
433	start_thread ();
434
435	++nreqs;
436
437	pthread_mutex_lock (&reqlock);
438
439	req->next = 0;
440
441	if (reqe)
442	{	431	{
443	reqe->next = req;	432	res = eio_poll ();
444	reqe = req;	433
		434	if (res > 0)
		435	croak (0);
445	}	436	}
446	else	437	while (max_outstanding && max_outstanding <= eio_nreqs ());
447	reqe = reqs = req;
448
449	pthread_cond_signal (&reqwait);
450	pthread_mutex_unlock (&reqlock);
451
452	if (nreqs > max_outstanding)
453	for (;;)
454	{
455	poll_cb ();
456
457	if (nreqs <= max_outstanding)
458	break;
459
460	poll_wait ();
461	}
462	}
463
464	static void end_thread (void)
465	{
466	aio_req req;
467	Newz (0, req, 1, aio_cb);
468	req->type = REQ_QUIT;
469
470	req_send (req);
471	}
472
473	static void min_parallel (int nthreads)
474	{
475	if (wanted < nthreads)
476	wanted = nthreads;
477	}
478
479	static void max_parallel (int nthreads)
480	{
481	int cur = started;
482
483	if (wanted > nthreads)
484	wanted = nthreads;
485
486	while (cur > wanted)
487	{
488	end_thread ();
489	cur--;
490	}
491
492	while (started > wanted)
493	{
494	poll_wait ();
495	poll_cb ();
496	}
497	}
498
499	static void create_pipe ()
500	{
501	if (pipe (respipe))
502	croak ("unable to initialize result pipe");
503
504	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
505	croak ("cannot set result pipe to nonblocking mode");
506
507	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
508	croak ("cannot set result pipe to nonblocking mode");
509	}
510
511	/*****************************************************************************/
512	/* work around various missing functions */
513
514	#if !HAVE_PREADWRITE
515	# define pread aio_pread
516	# define pwrite aio_pwrite
517
518	/*
519	* make our pread/pwrite safe against themselves, but not against
520	* normal read/write by using a mutex. slows down execution a lot,
521	* but that's your problem, not mine.
522	*/
523	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
524
525	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
526	{
527	ssize_t res;
528	off_t ooffset;
529
530	pthread_mutex_lock (&preadwritelock);
531	ooffset = lseek (fd, 0, SEEK_CUR);
532	lseek (fd, offset, SEEK_SET);
533	res = read (fd, buf, count);
534	lseek (fd, ooffset, SEEK_SET);
535	pthread_mutex_unlock (&preadwritelock);
536		438
537	return res;	439	return res;
538	}	440	}
539		441
540	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
541	{
542	ssize_t res;
543	off_t ooffset;
544
545	pthread_mutex_lock (&preadwritelock);
546	ooffset = lseek (fd, 0, SEEK_CUR);
547	lseek (fd, offset, SEEK_SET);
548	res = write (fd, buf, count);
549	lseek (fd, offset, SEEK_SET);
550	pthread_mutex_unlock (&preadwritelock);
551
552	return res;
553	}
554	#endif
555
556	#if !HAVE_FDATASYNC
557	# define fdatasync fsync
558	#endif
559
560	#if !HAVE_READAHEAD
561	# define readahead aio_readahead
562
563	static ssize_t readahead (int fd, off_t offset, size_t count)
564	{
565	char readahead_buf[4096];
566
567	while (count > 0)
568	{
569	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
570
571	pread (fd, readahead_buf, len, offset);
572	offset += len;
573	count -= len;
574	}
575
576	errno = 0;
577	}
578	#endif
579
580	#if !HAVE_READDIR_R
581	# define readdir_r aio_readdir_r
582
583	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
584
585	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
586	{
587	struct dirent *e;
588	int errorno;
589
590	pthread_mutex_lock (&readdirlock);
591
592	e = readdir (dirp);
593	errorno = errno;
594
595	if (e)
596	{
597	*res = ent;
598	strcpy (ent->d_name, e->d_name);
599	}
600	else
601	*res = 0;
602
603	pthread_mutex_unlock (&readdirlock);
604
605	errno = errorno;
606	return e ? 0 : -1;
607	}
608	#endif
609
610	/* sendfile always needs emulation */
611	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
612	{
613	ssize_t res;
614
615	if (!count)
616	return 0;
617
618	#if HAVE_SENDFILE
619	# if __linux
620	res = sendfile (ofd, ifd, &offset, count);
621
622	# elif __freebsd
623	/*
624	* Of course, the freebsd sendfile is a dire hack with no thoughts
625	* wasted on making it similar to other I/O functions.
626	*/
627	{
628	off_t sbytes;
629	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
630
631	if (res < 0 && sbytes)
632	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
633	res = sbytes;
634	}
635
636	# elif __hpux
637	res = sendfile (ofd, ifd, offset, count, 0, 0);
638
639	# elif __solaris
640	{
641	struct sendfilevec vec;
642	size_t sbytes;
643
644	vec.sfv_fd = ifd;
645	vec.sfv_flag = 0;
646	vec.sfv_off = offset;
647	vec.sfv_len = count;
648
649	res = sendfilev (ofd, &vec, 1, &sbytes);
650
651	if (res < 0 && sbytes)
652	res = sbytes;
653	}
654
655	# endif
656	#else
657	res = -1;
658	errno = ENOSYS;
659	#endif
660
661	if (res < 0
662	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
663	#if __solaris
664	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
665	#endif
666	)
667	)
668	{
669	/* emulate sendfile. this is a major pain in the ass */
670	char buf[4096];
671	res = 0;
672
673	while (count)
674	{
675	ssize_t cnt;
676
677	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
678
679	if (cnt <= 0)
680	{
681	if (cnt && !res) res = -1;
682	break;
683	}
684
685	cnt = write (ofd, buf, cnt);
686
687	if (cnt <= 0)
688	{
689	if (cnt && !res) res = -1;
690	break;
691	}
692
693	offset += cnt;
694	res += cnt;
695	count -= cnt;
696	}
697	}
698
699	return res;
700	}
701
702	/* read a full directory */
703	static int scandir_ (const char *path, void **namesp)
704	{
705	DIR *dirp = opendir (path);
706	union
707	{
708	struct dirent d;
709	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
710	} u;
711	struct dirent *entp;
712	char *name, *names;
713	int memlen = 4096;
714	int memofs = 0;
715	int res = 0;
716	int errorno;
717
718	if (!dirp)
719	return -1;
720
721	names = malloc (memlen);
722
723	for (;;)
724	{
725	errno = 0, readdir_r (dirp, &u.d, &entp);
726
727	if (!entp)
728	break;
729
730	name = entp->d_name;
731
732	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
733	{
734	int len = strlen (name) + 1;
735
736	res++;
737
738	while (memofs + len > memlen)
739	{
740	memlen *= 2;
741	names = realloc (names, memlen);
742	if (!names)
743	break;
744	}
745
746	memcpy (names + memofs, name, len);
747	memofs += len;
748	}
749	}
750
751	errorno = errno;
752	closedir (dirp);
753
754	if (errorno)
755	{
756	free (names);
757	errno = errorno;
758	res = -1;
759	}
760
761	*namesp = (void *)names;
762	return res;
763	}
764
765	/*****************************************************************************/
766
767	static void *aio_proc (void *thr_arg)
768	{
769	aio_req req;
770	int type;
771
772	do
773	{
774	pthread_mutex_lock (&reqlock);
775
776	for (;;)
777	{
778	req = reqs;
779
780	if (reqs)
781	{
782	reqs = reqs->next;
783	if (!reqs) reqe = 0;
784	}
785
786	if (req)
787	break;
788
789	pthread_cond_wait (&reqwait, &reqlock);
790	}
791
792	pthread_mutex_unlock (&reqlock);
793
794	errno = 0; /* strictly unnecessary */
795
796	if (!(req->flags & FLAG_CANCELLED))
797	switch (type = req->type) /* remember type for QUIT check */
798	{
799	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
800	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
801
802	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
803	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
804
805	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
806	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
807	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
808
809	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
810	case REQ_CLOSE: req->result = close (req->fd); break;
811	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
812	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
813	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
814	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
815	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
816
817	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
818	case REQ_FSYNC: req->result = fsync (req->fd); break;
819	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
820
821	case REQ_SLEEP:
822	{
823	struct timeval tv;
824
825	tv.tv_sec = req->fd;
826	tv.tv_usec = req->fd2;
827
828	req->result = select (0, 0, 0, 0, &tv);
829	}
830
831	case REQ_GROUP:
832	case REQ_NOP:
833	case REQ_QUIT:
834	break;
835
836	default:
837	req->result = ENOSYS;
838	break;
839	}
840
841	req->errorno = errno;
842
843	pthread_mutex_lock (&reslock);
844
845	req->next = 0;
846
847	if (rese)
848	{
849	rese->next = req;
850	rese = req;
851	}
852	else
853	{
854	rese = ress = req;
855
856	/* write a dummy byte to the pipe so fh becomes ready */
857	write (respipe [1], &respipe, 1);
858	}
859
860	pthread_mutex_unlock (&reslock);
861	}
862	while (type != REQ_QUIT);
863
864	return 0;
865	}
866
867	/*****************************************************************************/
868
869	static void atfork_prepare (void)
870	{
871	pthread_mutex_lock (&reqlock);
872	pthread_mutex_lock (&reslock);
873	#if !HAVE_PREADWRITE
874	pthread_mutex_lock (&preadwritelock);
875	#endif
876	#if !HAVE_READDIR_R
877	pthread_mutex_lock (&readdirlock);
878	#endif
879	}
880
881	static void atfork_parent (void)
882	{
883	#if !HAVE_READDIR_R
884	pthread_mutex_unlock (&readdirlock);
885	#endif
886	#if !HAVE_PREADWRITE
887	pthread_mutex_unlock (&preadwritelock);
888	#endif
889	pthread_mutex_unlock (&reslock);
890	pthread_mutex_unlock (&reqlock);
891	}
892
893	static void atfork_child (void)	442	static void atfork_child (void)
894	{	443	{
895	aio_req prv;
896
897	started = 0;
898
899	while (reqs)
900	{
901	prv = reqs;
902	reqs = prv->next;
903	req_free (prv);
904	}
905
906	reqs = reqe = 0;
907
908	while (ress)
909	{
910	prv = ress;
911	ress = prv->next;
912	req_free (prv);
913	}
914
915	ress = rese = 0;
916
917	close (respipe [0]);
918	close (respipe [1]);
919	create_pipe ();	444	create_respipe ();
920
921	atfork_parent ();
922	}	445	}
923		446
924	#define dREQ \	447	#define dREQ \
925	aio_req req; \	448	aio_req req; \
		449	int req_pri = next_pri; \
		450	next_pri = EIO_PRI_DEFAULT; \
926	\	451	\
927	if (SvOK (callback) && !SvROK (callback)) \	452	if (SvOK (callback) && !SvROK (callback)) \
928	croak ("callback must be undef or of reference type"); \	453	croak ("callback must be undef or of reference type"); \
929	\	454	\
930	Newz (0, req, 1, aio_cb); \	455	Newz (0, req, 1, eio_req); \
931	if (!req) \	456	if (!req) \
932	croak ("out of memory during aio_req allocation"); \	457	croak ("out of memory during eio_req allocation"); \
933	\	458	\
934	req->callback = newSVsv (callback)	459	req->callback = newSVsv (callback); \
		460	req->pri = req_pri
935		461
936	#define REQ_SEND \	462	#define REQ_SEND \
937	req_send (req); \	463	req_submit (req); \
938	\	464	\
939	if (GIMME_V != G_VOID) \	465	if (GIMME_V != G_VOID) \
940	XPUSHs (req_sv (req, AIO_REQ_KLASS));	466	XPUSHs (req_sv (req, AIO_REQ_KLASS));
941		467
942	MODULE = IO::AIO PACKAGE = IO::AIO	468	MODULE = IO::AIO PACKAGE = IO::AIO
943		469
944	PROTOTYPES: ENABLE	470	PROTOTYPES: ENABLE
945		471
946	BOOT:	472	BOOT:
947	{	473	{
948	HV *stash = gv_stashpv ("IO::AIO", 1);	474	stash = gv_stashpv ("IO::AIO", 1);
		475
949	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	476	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
950	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	477	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
951	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
952		484
953	create_pipe ();	485	create_respipe ();
954	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
955	}
956		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
957	void	494	void
958	min_parallel (nthreads)	495	max_poll_reqs (int nreqs)
959	int nthreads
960	PROTOTYPE: $	496	PROTOTYPE: $
		497	CODE:
		498	eio_set_max_poll_reqs (nreqs);
961		499
962	void	500	void
963	max_parallel (nthreads)	501	max_poll_time (double nseconds)
964	int nthreads
965	PROTOTYPE: $	502	PROTOTYPE: $
966
967	int
968	max_outstanding (nreqs)
969	int nreqs
970	PROTOTYPE: $
971	CODE:	503	CODE:
972	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:
973	max_outstanding = nreqs;	528	max_outstanding = maxreqs;
974		529
975	void	530	void
976	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	531	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
977	SV * pathname
978	int flags
979	int mode
980	SV * callback
981	PROTOTYPE: $$$;$	532	PROTOTYPE: $$$;$
982	PPCODE:	533	PPCODE:
983	{	534	{
984	dREQ;	535	dREQ;
985		536
986	req->type = REQ_OPEN;	537	req->type = EIO_OPEN;
987	req->data = newSVsv (pathname);	538	req->sv1 = newSVsv (pathname);
988	req->dataptr = SvPVbyte_nolen (req->data);	539	req->ptr1 = SvPVbyte_nolen (req->sv1);
989	req->fd = flags;	540	req->int1 = flags;
990	req->mode = mode;	541	req->int2 = mode;
991		542
992	REQ_SEND;	543	REQ_SEND;
993	}	544	}
994		545
995	void	546	void
996	aio_close (fh,callback=&PL_sv_undef)	547	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
997	SV * fh
998	SV * callback
999	PROTOTYPE: $;$	548	PROTOTYPE: $;$
1000	ALIAS:	549	ALIAS:
1001	aio_close = REQ_CLOSE
1002	aio_fsync = REQ_FSYNC	550	aio_fsync = EIO_FSYNC
1003	aio_fdatasync = REQ_FDATASYNC	551	aio_fdatasync = EIO_FDATASYNC
1004	PPCODE:	552	PPCODE:
1005	{	553	{
1006	dREQ;	554	dREQ;
1007		555
1008	req->type = ix;	556	req->type = ix;
1009	req->fh = newSVsv (fh);	557	req->sv1 = newSVsv (fh);
1010	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	558	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1011		559
1012	REQ_SEND (req);	560	REQ_SEND (req);
1013	}	561	}
1014		562
1015	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
1016	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)
1017	SV * fh
1018	UV offset
1019	UV length
1020	SV * data
1021	UV dataoffset
1022	SV * callback
1023	ALIAS:	593	ALIAS:
1024	aio_read = REQ_READ	594	aio_read = EIO_READ
1025	aio_write = REQ_WRITE	595	aio_write = EIO_WRITE
1026	PROTOTYPE: $$$$$;$	596	PROTOTYPE: $$$$$;$
1027	PPCODE:	597	PPCODE:
1028	{	598	{
1029	aio_req req;
1030	STRLEN svlen;	599	STRLEN svlen;
1031	char *svptr = SvPVbyte (data, svlen);	600	char *svptr = SvPVbyte (data, svlen);
		601	UV len = SvUV (length);
1032		602
1033	SvUPGRADE (data, SVt_PV);	603	SvUPGRADE (data, SVt_PV);
1034	SvPOK_on (data);	604	SvPOK_on (data);
1035		605
1036	if (dataoffset < 0)	606	if (dataoffset < 0)
1037	dataoffset += svlen;	607	dataoffset += svlen;
1038		608
1039	if (dataoffset < 0 || dataoffset > svlen)	609	if (dataoffset < 0 || dataoffset > svlen)
1040	croak ("data offset outside of string");	610	croak ("dataoffset outside of data scalar");
1041		611
1042	if (ix == REQ_WRITE)	612	if (ix == EIO_WRITE)
1043	{	613	{
1044	/* write: check length and adjust. */	614	/* write: check length and adjust. */
1045	if (length < 0 || length + dataoffset > svlen)	615	if (!SvOK (length) || len + dataoffset > svlen)
1046	length = svlen - dataoffset;	616	len = svlen - dataoffset;
1047	}	617	}
1048	else	618	else
1049	{	619	{
1050	/* read: grow scalar as necessary */	620	/* read: grow scalar as necessary */
1051	svptr = SvGROW (data, length + dataoffset);	621	svptr = SvGROW (data, len + dataoffset + 1);
1052	}	622	}
1053		623
1054	if (length < 0)	624	if (len < 0)
1055	croak ("length must not be negative");	625	croak ("length must not be negative");
1056		626
1057	{	627	{
1058	dREQ;	628	dREQ;
1059		629
1060	req->type = ix;	630	req->type = ix;
1061	req->fh = newSVsv (fh);	631	req->sv1 = newSVsv (fh);
1062	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	632	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1063	: IoOFP (sv_2io (fh)));	633	: IoOFP (sv_2io (fh)));
		634	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1064	req->offset = offset;	635	req->size = len;
1065	req->length = length;
1066	req->data = SvREFCNT_inc (data);	636	req->sv2 = SvREFCNT_inc (data);
1067	req->dataptr = (char *)svptr + dataoffset;	637	req->ptr2 = (char *)svptr + dataoffset;
		638	req->stroffset = dataoffset;
1068		639
1069	if (!SvREADONLY (data))	640	if (!SvREADONLY (data))
1070	{	641	{
1071	SvREADONLY_on (data);	642	SvREADONLY_on (data);
1072	req->data2ptr = (void *)data;	643	req->flags |= FLAG_SV2_RO_OFF;
1073	}	644	}
1074		645
1075	REQ_SEND;	646	REQ_SEND;
1076	}	647	}
1077	}	648	}
1078		649
1079	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
1080	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)
1081	SV * out_fh
1082	SV * in_fh
1083	UV in_offset
1084	UV length
1085	SV * callback
1086	PROTOTYPE: $$$$;$	667	PROTOTYPE: $$$$;$
1087	PPCODE:	668	PPCODE:
1088	{	669	{
1089	dREQ;	670	dREQ;
1090		671
1091	req->type = REQ_SENDFILE;	672	req->type = EIO_SENDFILE;
1092	req->fh = newSVsv (out_fh);	673	req->sv1 = newSVsv (out_fh);
1093	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	674	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1094	req->fh2 = newSVsv (in_fh);	675	req->sv2 = newSVsv (in_fh);
1095	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	676	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1096	req->offset = in_offset;	677	req->offs = SvVAL64 (in_offset);
1097	req->length = length;	678	req->size = length;
1098		679
1099	REQ_SEND;	680	REQ_SEND;
1100	}	681	}
1101		682
1102	void	683	void
1103	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	684	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1104	SV * fh
1105	UV offset
1106	IV length
1107	SV * callback
1108	PROTOTYPE: $$$;$	685	PROTOTYPE: $$$;$
1109	PPCODE:	686	PPCODE:
1110	{	687	{
1111	dREQ;	688	dREQ;
1112		689
1113	req->type = REQ_READAHEAD;	690	req->type = EIO_READAHEAD;
1114	req->fh = newSVsv (fh);	691	req->sv1 = newSVsv (fh);
1115	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	692	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1116	req->offset = offset;	693	req->offs = SvVAL64 (offset);
1117	req->length = length;	694	req->size = length;
1118		695
1119	REQ_SEND;	696	REQ_SEND;
1120	}	697	}
1121		698
1122	void	699	void
1123	aio_stat (fh_or_path,callback=&PL_sv_undef)	700	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1124	SV * fh_or_path
1125	SV * callback
1126	ALIAS:	701	ALIAS:
1127	aio_stat = REQ_STAT	702	aio_stat = EIO_STAT
1128	aio_lstat = REQ_LSTAT	703	aio_lstat = EIO_LSTAT
1129	PPCODE:	704	PPCODE:
1130	{	705	{
1131	dREQ;	706	dREQ;
1132		707
1133	New (0, req->statdata, 1, Stat_t);	708	req->sv1 = newSVsv (fh_or_path);
1134	if (!req->statdata)
1135	{
1136	req_free (req);
1137	croak ("out of memory during aio_req->statdata allocation");
1138	}
1139		709
1140	if (SvPOK (fh_or_path))	710	if (SvPOK (req->sv1))
1141	{	711	{
1142	req->type = ix;	712	req->type = ix;
1143	req->data = newSVsv (fh_or_path);
1144	req->dataptr = SvPVbyte_nolen (req->data);	713	req->ptr1 = SvPVbyte_nolen (req->sv1);
1145	}	714	}
1146	else	715	else
1147	{	716	{
1148	req->type = REQ_FSTAT;	717	req->type = EIO_FSTAT;
1149	req->fh = newSVsv (fh_or_path);
1150	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	718	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1151	}	719	}
1152		720
1153	REQ_SEND;	721	REQ_SEND;
1154	}	722	}
1155		723
1156	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
1157	aio_unlink (pathname,callback=&PL_sv_undef)	822	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1158	SV * pathname
1159	SV * callback
1160	ALIAS:	823	ALIAS:
1161	aio_unlink = REQ_UNLINK	824	aio_unlink = EIO_UNLINK
1162	aio_rmdir = REQ_RMDIR	825	aio_rmdir = EIO_RMDIR
1163	aio_readdir = REQ_READDIR	826	aio_readdir = EIO_READDIR
1164	PPCODE:	827	PPCODE:
1165	{	828	{
1166	dREQ;	829	dREQ;
1167		830
1168	req->type = ix;	831	req->type = ix;
1169	req->data = newSVsv (pathname);	832	req->sv1 = newSVsv (pathname);
1170	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);
1171		853
1172	REQ_SEND;	854	REQ_SEND;
1173	}	855	}
1174		856
1175	void	857	void
1176	aio_link (oldpath,newpath,callback=&PL_sv_undef)	858	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1177	SV * oldpath
1178	SV * newpath
1179	SV * callback
1180	ALIAS:
1181	aio_link = REQ_LINK
1182	aio_symlink = REQ_SYMLINK
1183	aio_rename = REQ_RENAME
1184	PPCODE:	859	PPCODE:
1185	{	860	{
1186	dREQ;	861	dREQ;
1187		862
1188	req->type = ix;	863	req->type = EIO_MKNOD;
1189	req->fh = newSVsv (oldpath);	864	req->sv1 = newSVsv (pathname);
1190	req->data2ptr = SvPVbyte_nolen (req->fh);	865	req->ptr1 = SvPVbyte_nolen (req->sv1);
1191	req->data = newSVsv (newpath);	866	req->int2 = (mode_t)mode;
1192	req->dataptr = SvPVbyte_nolen (req->data);	867	req->offs = dev;
1193		868
1194	REQ_SEND;	869	REQ_SEND;
1195	}	870	}
1196		871
1197	void	872	void
1198	aio_sleep (delay,callback=&PL_sv_undef)	873	aio_busy (double delay, SV *callback=&PL_sv_undef)
1199	double delay
1200	SV * callback
1201	PPCODE:	874	PPCODE:
1202	{	875	{
1203	dREQ;	876	dREQ;
1204		877
1205	req->type = REQ_SLEEP;	878	req->type = EIO_BUSY;
1206	req->fd = delay < 0. ? 0 : delay;	879	req->nv1 = delay < 0. ? 0. : delay;
1207	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1208		880
1209	REQ_SEND;	881	REQ_SEND;
1210	}	882	}
1211		883
1212	void	884	void
1213	aio_group (callback=&PL_sv_undef)	885	aio_group (SV *callback=&PL_sv_undef)
1214	SV * callback
1215	PROTOTYPE: ;$	886	PROTOTYPE: ;$
1216	PPCODE:	887	PPCODE:
1217	{	888	{
1218	dREQ;	889	dREQ;
		890
1219	req->type = REQ_GROUP;	891	req->type = EIO_GROUP;
		892
1220	req_send (req);	893	eio_submit (req);
1221	XPUSHs (req_sv (req, AIO_GRP_KLASS));	894	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1222	}	895	}
1223		896
1224	void	897	void
1225	aio_nop (callback=&PL_sv_undef)	898	aio_nop (SV *callback=&PL_sv_undef)
1226	SV * callback	899	ALIAS:
		900	aio_nop = EIO_NOP
		901	aio_sync = EIO_SYNC
1227	PPCODE:	902	PPCODE:
1228	{	903	{
1229	dREQ;	904	dREQ;
1230		905
1231	req->type = REQ_NOP;	906	req->type = ix;
1232		907
1233	REQ_SEND;	908	REQ_SEND;
1234	}	909	}
		910
		911	int
		912	aioreq_pri (int pri = 0)
		913	PROTOTYPE: ;$
		914	CODE:
		915	RETVAL = next_pri;
		916	if (items > 0)
		917	{
		918	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		919	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		920	next_pri = pri;
		921	}
		922	OUTPUT:
		923	RETVAL
		924
		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;
1235		932
1236	void	933	void
1237	flush ()	934	flush ()
1238	PROTOTYPE:	935	PROTOTYPE:
1239	CODE:	936	CODE:
1240	while (nreqs)	937	while (eio_nreqs ())
1241	{	938	{
1242	poll_wait ();	939	poll_wait ();
1243	poll_cb ();	940	poll_cb ();
1244	}	941	}
1245		942
1246	void	943	int
1247	poll()	944	poll()
1248	PROTOTYPE:	945	PROTOTYPE:
1249	CODE:	946	CODE:
1250	if (nreqs)
1251	{
1252	poll_wait ();	947	poll_wait ();
1253	poll_cb ();	948	RETVAL = poll_cb ();
1254	}	949	OUTPUT:
		950	RETVAL
1255		951
1256	int	952	int
1257	poll_fileno()	953	poll_fileno()
1258	PROTOTYPE:	954	PROTOTYPE:
1259	CODE:	955	CODE:
…		…
1271		967
1272	void	968	void
1273	poll_wait()	969	poll_wait()
1274	PROTOTYPE:	970	PROTOTYPE:
1275	CODE:	971	CODE:
1276	if (nreqs)
1277	poll_wait ();	972	poll_wait ();
1278		973
1279	int	974	int
1280	nreqs()	975	nreqs()
1281	PROTOTYPE:	976	PROTOTYPE:
1282	CODE:	977	CODE:
1283	RETVAL = nreqs;	978	RETVAL = eio_nreqs ();
1284	OUTPUT:	979	OUTPUT:
1285	RETVAL	980	RETVAL
1286		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
1287	PROTOTYPES: DISABLE	1011	PROTOTYPES: DISABLE
1288		1012
1289	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1013	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1290		1014
1291	void	1015	void
1292	cancel (aio_req_ornot req)	1016	cancel (aio_req_ornot req)
1293	PROTOTYPE:
1294	CODE:	1017	CODE:
1295	req_cancel (req);	1018	eio_cancel (req);
1296		1019
1297	void	1020	void
1298	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1021	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1299	CODE:	1022	CODE:
1300	SvREFCNT_dec (req->callback);	1023	SvREFCNT_dec (req->callback);
…		…
1305	void	1028	void
1306	add (aio_req grp, ...)	1029	add (aio_req grp, ...)
1307	PPCODE:	1030	PPCODE:
1308	{	1031	{
1309	int i;	1032	int i;
1310	aio_req req;
1311		1033
1312	if (grp->fd == 2)	1034	if (grp->int1 == 2)
1313	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");
1314		1036
1315	for (i = 1; i < items; ++i )	1037	for (i = 1; i < items; ++i )
1316	{	1038	{
		1039	aio_req req;
		1040
1317	if (GIMME_V != G_VOID)	1041	if (GIMME_V != G_VOID)
1318	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1042	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1319		1043
1320	req = SvAIO_REQ (ST (i));	1044	req = SvAIO_REQ (ST (i));
1321		1045
1322	if (req)	1046	if (req)
1323	{	1047	eio_grp_add (grp, req);
1324	++grp->length;
1325	req->grp = grp;
1326
1327	req->grp_prev = 0;
1328	req->grp_next = grp->grp_first;
1329
1330	if (grp->grp_first)
1331	grp->grp_first->grp_prev = req;
1332
1333	grp->grp_first = req;
1334	}	1048	}
1335	}
1336	}	1049	}
		1050
		1051	void
		1052	cancel_subs (aio_req_ornot req)
		1053	CODE:
		1054	req_cancel_subs (req);
1337		1055
1338	void	1056	void
1339	result (aio_req grp, ...)	1057	result (aio_req grp, ...)
1340	CODE:	1058	CODE:
1341	{	1059	{
1342	int i;	1060	int i;
		1061	AV *av;
		1062
		1063	grp->errorno = errno;
		1064
1343	AV *av = newAV ();	1065	av = newAV ();
1344		1066
1345	for (i = 1; i < items; ++i )	1067	for (i = 1; i < items; ++i )
1346	av_push (av, newSVsv (ST (i)));	1068	av_push (av, newSVsv (ST (i)));
1347		1069
1348	SvREFCNT_dec (grp->data);	1070	SvREFCNT_dec (grp->sv1);
1349	grp->data = (SV *)av;	1071	grp->sv1 = (SV *)av;
1350	}	1072	}
1351		1073
1352	void	1074	void
		1075	errno (aio_req grp, int errorno = errno)
		1076	CODE:
		1077	grp->errorno = errorno;
		1078
		1079	void
1353	feed_limit (aio_req grp, int limit)	1080	limit (aio_req grp, int limit)
1354	CODE:	1081	CODE:
1355	grp->fd2 = limit;	1082	eio_grp_limit (grp, limit);
1356	aio_grp_feed (grp);
1357		1083
1358	void	1084	void
1359	feed (aio_req grp, SV *callback=&PL_sv_undef)	1085	feed (aio_req grp, SV *callback=&PL_sv_undef)
1360	CODE:	1086	CODE:
1361	{	1087	{
1362	SvREFCNT_dec (grp->fh2);	1088	SvREFCNT_dec (grp->sv2);
1363	grp->fh2 = newSVsv (callback);	1089	grp->sv2 = newSVsv (callback);
1364		1090
1365	if (grp->fd2 <= 0)	1091	if (grp->int2 <= 0)
1366	grp->fd2 = 2;	1092	grp->int2 = 2;
1367		1093
1368	aio_grp_feed (grp);	1094	eio_grp_limit (grp, grp->int2);
1369	}	1095	}
1370		1096

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