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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.57 by root, Mon Oct 23 18:38:15 2006 UTC vs.
Revision 1.125 by root, Thu Jun 19 09:05:43 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	/* perl stupidly overrides readdir and maybe others */
40	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
41	# define NAME_MAX 4096	72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
		81	#else
		82	# define SvVAL64 SvNV
42	#endif	83	#endif
43		84
44	#if __ia64	85	static HV *stash;
45	# define STACKSIZE 65536	86	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		87
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	88	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	89	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		90
67	typedef struct aio_cb	91	#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;	92	SV *callback; \
76	SV *fh, *fh2;	93	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;	94	STRLEN stroffset; \
87	mode_t mode; /* open */	95	SV *self;
88	unsigned char cancelled;
89	} aio_cb;
90		96
		97	#define EIO_NO_WRAPPERS 1
		98
		99	#include "libeio/eio.h"
		100
		101	static int req_invoke (eio_req *req);
		102	#define EIO_FINISH(req) req_invoke (req)
		103	static void aio_grp_feed (eio_req *grp);
		104	#define EIO_FEED(req) aio_grp_feed (req)
		105	static void req_destroy (eio_req *grp);
		106	#define EIO_DESTROY(req) req_destroy (req)
		107
		108	enum {
		109	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		110	};
		111
		112	#include "libeio/eio.c"
		113
91	typedef aio_cb *aio_req;	114	typedef eio_req *aio_req;
92	typedef aio_cb *aio_req_ornot;	115	typedef eio_req *aio_req_ornot;
93		116
94	static int started, wanted;	117	static SV *on_next_submit;
95	static volatile int nreqs;	118	static int next_pri = EIO_PRI_DEFAULT;
96	static int max_outstanding = 1<<30;	119	static int max_outstanding;
97	static int respipe [2];
98		120
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	121	static int respipe_osf [2], respipe [2] = { -1, -1 };
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		122
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	123	static void req_destroy (aio_req req);
104	static volatile aio_req ress, rese; /* queue start, queue end */
105
106	static void req_invoke (aio_req req);	124	static void req_cancel (aio_req req);
107	static void req_free (aio_req req);	125
		126	static void want_poll (void)
		127	{
		128	/* write a dummy byte to the pipe so fh becomes ready */
		129	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		130	}
		131
		132	static void done_poll (void)
		133	{
		134	/* read any signals sent by the worker threads */
		135	char buf [4];
		136	while (respipe_read (respipe [0], buf, 4) == 4)
		137	;
		138	}
108		139
109	/* must be called at most once */	140	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	141	static SV *req_sv (aio_req req, const char *klass)
111	{	142	{
112	if (!req->self)	143	if (!req->self)
…		…
130	return mg ? (aio_req)mg->mg_ptr : 0;	161	return mg ? (aio_req)mg->mg_ptr : 0;
131	}	162	}
132		163
133	static void aio_grp_feed (aio_req grp)	164	static void aio_grp_feed (aio_req grp)
134	{	165	{
135	while (grp->length < grp->fd2 && !grp->cancelled)	166	if (grp->sv2 && SvOK (grp->sv2))
136	{	167	{
137	int old_len = grp->length;	168	dSP;
138		169
139	if (grp->fh2 && SvOK (grp->fh2))	170	ENTER;
		171	SAVETMPS;
		172	PUSHMARK (SP);
		173	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		174	PUTBACK;
		175	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		176	SPAGAIN;
		177	FREETMPS;
		178	LEAVE;
		179	}
		180	}
		181
		182	static void req_submit (eio_req *req)
		183	{
		184	eio_submit (req);
		185
		186	if (on_next_submit)
		187	{
		188	dSP;
		189	SV *cb = sv_2mortal (on_next_submit);
		190
		191	on_next_submit = 0;
		192
		193	PUSHMARK (SP);
		194	PUTBACK;
		195	call_sv (cb, G_DISCARD | G_EVAL);
		196	}
		197	}
		198
		199	static int req_invoke (eio_req *req)
		200	{
		201	dSP;
		202
		203	if (req->flags & FLAG_SV2_RO_OFF)
		204	SvREADONLY_off (req->sv2);
		205
		206	if (!EIO_CANCELLED (req) && SvOK (req->callback))
		207	{
		208	ENTER;
		209	SAVETMPS;
		210	PUSHMARK (SP);
		211	EXTEND (SP, 1);
		212
		213	switch (req->type)
140	{	214	{
141	dSP;	215	case EIO_READDIR:
		216	{
		217	SV *rv = &PL_sv_undef;
142		218
143	ENTER;	219	if (req->result >= 0)
144	SAVETMPS;	220	{
145	PUSHMARK (SP);	221	int i;
146	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	222	char *buf = req->ptr2;
147	PUTBACK;	223	AV *av = newAV ();
148	call_sv (grp->fh2, G_VOID | G_EVAL);	224
149	SPAGAIN;	225	av_extend (av, req->result - 1);
150	FREETMPS;	226
151	LEAVE;	227	for (i = 0; i < req->result; ++i)
		228	{
		229	SV *sv = newSVpv (buf, 0);
		230
		231	av_store (av, i, sv);
		232	buf += SvCUR (sv) + 1;
		233	}
		234
		235	rv = sv_2mortal (newRV_noinc ((SV *)av));
		236	}
		237
		238	PUSHs (rv);
		239	}
		240	break;
		241
		242	case EIO_OPEN:
		243	{
		244	/* convert fd to fh */
		245	SV *fh = &PL_sv_undef;
		246
		247	if (req->result >= 0)
		248	{
		249	GV *gv = (GV *)sv_newmortal ();
		250	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		251	char sym [64];
		252	int symlen;
		253
		254	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		255	gv_init (gv, stash, sym, symlen, 0);
		256
		257	symlen = snprintf (
		258	sym,
		259	sizeof (sym),
		260	"%s&=%d",
		261	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		262	req->result
		263	);
		264
		265	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		266	fh = (SV *)gv;
		267	}
		268
		269	PUSHs (fh);
		270	}
		271	break;
		272
		273	case EIO_GROUP:
		274	req->int1 = 2; /* mark group as finished */
		275
		276	if (req->sv1)
		277	{
		278	int i;
		279	AV *av = (AV *)req->sv1;
		280
		281	EXTEND (SP, AvFILL (av) + 1);
		282	for (i = 0; i <= AvFILL (av); ++i)
		283	PUSHs (*av_fetch (av, i, 0));
		284	}
		285	break;
		286
		287	case EIO_NOP:
		288	case EIO_BUSY:
		289	break;
		290
		291	case EIO_READLINK:
		292	if (req->result > 0)
		293	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		294	break;
		295
		296	case EIO_STAT:
		297	case EIO_LSTAT:
		298	case EIO_FSTAT:
		299	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		300	PL_laststatval = req->result;
		301	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		302	PUSHs (sv_2mortal (newSViv (req->result)));
		303	break;
		304
		305	case EIO_READ:
		306	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		307	*SvEND (req->sv2) = 0;
		308	PUSHs (sv_2mortal (newSViv (req->result)));
		309	break;
		310
		311	case EIO_DUP2:
		312	if (req->result > 0)
		313	req->result = 0;
		314	/* FALLTHROUGH */
		315
		316	default:
		317	PUSHs (sv_2mortal (newSViv (req->result)));
		318	break;
152	}	319	}
153		320
154	/* stop if no progress has been made */	321	errno = req->errorno;
155	if (old_len == grp->length)	322
156	{	323	PUTBACK;
157	SvREFCNT_dec (grp->fh2);	324	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
158	grp->fh2 = 0;	325	SPAGAIN;
159	break;	326
160	}	327	FREETMPS;
		328	LEAVE;
		329
		330	PUTBACK;
161	}	331	}
162	}
163		332
164	static void aio_grp_dec (aio_req grp)	333	return !!SvTRUE (ERRSV);
165	{
166	--grp->length;
167
168	/* call feeder, if applicable */
169	aio_grp_feed (grp);
170
171	/* finish, if done */
172	if (!grp->length && grp->fd)
173	{
174	req_invoke (grp);
175	req_free (grp);
176	}
177	}	334	}
178		335
179	static void poll_wait ()
180	{
181	if (nreqs && !ress)
182	{
183	fd_set rfd;
184	FD_ZERO(&rfd);
185	FD_SET(respipe [0], &rfd);
186
187	select (respipe [0] + 1, &rfd, 0, 0, 0);
188	}
189	}
190
191	static void req_invoke (aio_req req)
192	{
193	dSP;
194	int errorno = errno;
195
196	if (req->cancelled || !SvOK (req->callback))
197	return;
198
199	errno = req->errorno;
200
201	ENTER;
202	SAVETMPS;
203	PUSHMARK (SP);
204	EXTEND (SP, 1);
205
206	switch (req->type)
207	{
208	case REQ_READDIR:
209	{
210	SV *rv = &PL_sv_undef;
211
212	if (req->result >= 0)
213	{
214	char *buf = req->data2ptr;
215	AV *av = newAV ();
216
217	while (req->result)
218	{
219	SV *sv = newSVpv (buf, 0);
220
221	av_push (av, sv);
222	buf += SvCUR (sv) + 1;
223	req->result--;
224	}
225
226	rv = sv_2mortal (newRV_noinc ((SV *)av));
227	}
228
229	PUSHs (rv);
230	}
231	break;
232
233	case REQ_OPEN:
234	{
235	/* convert fd to fh */
236	SV *fh;
237
238	PUSHs (sv_2mortal (newSViv (req->result)));
239	PUTBACK;
240	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
241	SPAGAIN;
242
243	fh = SvREFCNT_inc (POPs);
244
245	PUSHMARK (SP);
246	XPUSHs (sv_2mortal (fh));
247	}
248	break;
249
250	case REQ_GROUP:
251	req->fd = 2; /* mark group as finished */
252
253	if (req->data)
254	{
255	int i;
256	AV *av = (AV *)req->data;
257
258	EXTEND (SP, AvFILL (av) + 1);
259	for (i = 0; i <= AvFILL (av); ++i)
260	PUSHs (*av_fetch (av, i, 0));
261	}
262	break;
263
264	case REQ_NOP:
265	case REQ_SLEEP:
266	break;
267
268	default:
269	PUSHs (sv_2mortal (newSViv (req->result)));
270	break;
271	}
272
273
274	PUTBACK;
275	call_sv (req->callback, G_VOID | G_EVAL);
276	SPAGAIN;
277
278	FREETMPS;
279	LEAVE;
280
281	errno = errorno;
282
283	if (SvTRUE (ERRSV))
284	{
285	req_free (req);
286	croak (0);
287	}
288	}
289
290	static void req_free (aio_req req)	336	static void req_destroy (aio_req req)
291	{	337	{
292	if (req->grp)
293	{
294	aio_req grp = req->grp;
295
296	/* unlink request */
297	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
298	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
299
300	if (grp->grp_first == req)
301	grp->grp_first = req->grp_next;
302
303	aio_grp_dec (grp);
304	}
305
306	if (req->self)	338	if (req->self)
307	{	339	{
308	sv_unmagic (req->self, PERL_MAGIC_ext);	340	sv_unmagic (req->self, PERL_MAGIC_ext);
309	SvREFCNT_dec (req->self);	341	SvREFCNT_dec (req->self);
310	}	342	}
311		343
312	SvREFCNT_dec (req->data);
313	SvREFCNT_dec (req->fh);	344	SvREFCNT_dec (req->sv1);
314	SvREFCNT_dec (req->fh2);	345	SvREFCNT_dec (req->sv2);
315	SvREFCNT_dec (req->callback);	346	SvREFCNT_dec (req->callback);
316	Safefree (req->statdata);
317
318	if (req->type == REQ_READDIR && req->result >= 0)
319	free (req->data2ptr);
320		347
321	Safefree (req);	348	Safefree (req);
322	}	349	}
323		350
324	static void req_cancel (aio_req req)	351	static void req_cancel_subs (aio_req grp)
325	{	352	{
326	req->cancelled = 1;	353	aio_req sub;
327		354
328	if (req->type == REQ_GROUP)	355	if (grp->type != EIO_GROUP)
		356	return;
		357
		358	SvREFCNT_dec (grp->sv2);
		359	grp->sv2 = 0;
		360
		361	eio_grp_cancel (grp);
		362	}
		363
		364	#ifdef USE_SOCKETS_AS_HANDLES
		365	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		366	#else
		367	# define TO_SOCKET(x) (x)
		368	#endif
		369
		370	static void
		371	create_respipe (void)
		372	{
		373	int old_readfd = respipe [0];
		374
		375	if (respipe [1] >= 0)
		376	respipe_close (TO_SOCKET (respipe [1]));
		377
		378	#ifdef _WIN32
		379	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		380	#else
		381	if (pipe (respipe))
		382	#endif
		383	croak ("unable to initialize result pipe");
		384
		385	if (old_readfd >= 0)
329	{	386	{
330	aio_req sub;	387	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		388	croak ("unable to initialize result pipe(2)");
331		389
332	for (sub = req->grp_first; sub; sub = sub->grp_next)	390	respipe_close (respipe [0]);
333	req_cancel (sub);	391	respipe [0] = old_readfd;
334	}	392	}
335	}
336		393
		394	#ifdef _WIN32
		395	int arg = 1;
		396	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		397	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		398	#else
		399	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		400	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		401	#endif
		402	croak ("unable to initialize result pipe(3)");
		403
		404	respipe_osf [0] = TO_SOCKET (respipe [0]);
		405	respipe_osf [1] = TO_SOCKET (respipe [1]);
		406	}
		407
		408	static void poll_wait (void)
		409	{
		410	fd_set rfd;
		411
		412	while (eio_nreqs ())
		413	{
		414	int size;
		415
		416	X_LOCK (reslock);
		417	size = res_queue.size;
		418	X_UNLOCK (reslock);
		419
		420	if (size)
		421	return;
		422
		423	etp_maybe_start_thread ();
		424
		425	FD_ZERO (&rfd);
		426	FD_SET (respipe [0], &rfd);
		427
		428	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		429	}
		430	}
		431
337	static int poll_cb ()	432	static int poll_cb (void)
338	{	433	{
339	dSP;
340	int count = 0;
341	int do_croak = 0;
342	aio_req req;
343
344	for (;;)	434	for (;;)
345	{	435	{
346	pthread_mutex_lock (&reslock);	436	int res = eio_poll ();
347	req = ress;
348		437
349	if (req)	438	if (res > 0)
350	{
351	ress = req->next;
352
353	if (!ress)
354	{
355	/* read any signals sent by the worker threads */
356	char buf [32];
357	while (read (respipe [0], buf, 32) == 32)
358	;
359
360	rese = 0;
361	}
362	}
363
364	pthread_mutex_unlock (&reslock);
365
366	if (!req)
367	break;	439	croak (0);
368		440
369	--nreqs;	441	if (!max_outstanding || max_outstanding > eio_nreqs ())
		442	return res;
370		443
371	if (req->type == REQ_QUIT)	444	poll_wait ();
372	started--;
373	else if (req->type == REQ_GROUP && req->length)
374	{
375	req->fd = 1; /* mark request as delayed */
376	continue;
377	}
378	else
379	{
380	if (req->type == REQ_READ)
381	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
382
383	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
384	SvREADONLY_off (req->data);
385
386	if (req->statdata)
387	{
388	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
389	PL_laststatval = req->result;
390	PL_statcache = *(req->statdata);
391	}
392
393	req_invoke (req);
394
395	count++;
396	}
397
398	req_free (req);
399	}	445	}
400
401	return count;
402	}
403
404	static void *aio_proc(void *arg);
405
406	static void start_thread (void)
407	{
408	sigset_t fullsigset, oldsigset;
409	pthread_t tid;
410	pthread_attr_t attr;
411
412	pthread_attr_init (&attr);
413	pthread_attr_setstacksize (&attr, STACKSIZE);
414	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
415
416	sigfillset (&fullsigset);
417	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
418
419	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
420	started++;
421
422	sigprocmask (SIG_SETMASK, &oldsigset, 0);
423	}
424
425	static void req_send (aio_req req)
426	{
427	while (started < wanted && nreqs >= started)
428	start_thread ();
429
430	++nreqs;
431
432	pthread_mutex_lock (&reqlock);
433
434	req->next = 0;
435
436	if (reqe)
437	{
438	reqe->next = req;
439	reqe = req;
440	}
441	else
442	reqe = reqs = req;
443
444	pthread_cond_signal (&reqwait);
445	pthread_mutex_unlock (&reqlock);
446
447	if (nreqs > max_outstanding)
448	for (;;)
449	{
450	poll_cb ();
451
452	if (nreqs <= max_outstanding)
453	break;
454
455	poll_wait ();
456	}
457	}
458
459	static void end_thread (void)
460	{
461	aio_req req;
462	Newz (0, req, 1, aio_cb);
463	req->type = REQ_QUIT;
464
465	req_send (req);
466	}
467
468	static void min_parallel (int nthreads)
469	{
470	if (wanted < nthreads)
471	wanted = nthreads;
472	}
473
474	static void max_parallel (int nthreads)
475	{
476	int cur = started;
477
478	if (wanted > nthreads)
479	wanted = nthreads;
480
481	while (cur > wanted)
482	{
483	end_thread ();
484	cur--;
485	}
486
487	while (started > wanted)
488	{
489	poll_wait ();
490	poll_cb ();
491	}
492	}
493
494	static void create_pipe ()
495	{
496	if (pipe (respipe))
497	croak ("unable to initialize result pipe");
498
499	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
500	croak ("cannot set result pipe to nonblocking mode");
501
502	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
503	croak ("cannot set result pipe to nonblocking mode");
504	}
505
506	/*****************************************************************************/
507	/* work around various missing functions */
508
509	#if !HAVE_PREADWRITE
510	# define pread aio_pread
511	# define pwrite aio_pwrite
512
513	/*
514	* make our pread/pwrite safe against themselves, but not against
515	* normal read/write by using a mutex. slows down execution a lot,
516	* but that's your problem, not mine.
517	*/
518	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
519
520	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
521	{
522	ssize_t res;
523	off_t ooffset;
524
525	pthread_mutex_lock (&preadwritelock);
526	ooffset = lseek (fd, 0, SEEK_CUR);
527	lseek (fd, offset, SEEK_SET);
528	res = read (fd, buf, count);
529	lseek (fd, ooffset, SEEK_SET);
530	pthread_mutex_unlock (&preadwritelock);
531
532	return res;
533	}
534
535	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
536	{
537	ssize_t res;
538	off_t ooffset;
539
540	pthread_mutex_lock (&preadwritelock);
541	ooffset = lseek (fd, 0, SEEK_CUR);
542	lseek (fd, offset, SEEK_SET);
543	res = write (fd, buf, count);
544	lseek (fd, offset, SEEK_SET);
545	pthread_mutex_unlock (&preadwritelock);
546
547	return res;
548	}
549	#endif
550
551	#if !HAVE_FDATASYNC
552	# define fdatasync fsync
553	#endif
554
555	#if !HAVE_READAHEAD
556	# define readahead aio_readahead
557
558	static ssize_t readahead (int fd, off_t offset, size_t count)
559	{
560	char readahead_buf[4096];
561
562	while (count > 0)
563	{
564	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
565
566	pread (fd, readahead_buf, len, offset);
567	offset += len;
568	count -= len;
569	}
570
571	errno = 0;
572	}
573	#endif
574
575	#if !HAVE_READDIR_R
576	# define readdir_r aio_readdir_r
577
578	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
579
580	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
581	{
582	struct dirent *e;
583	int errorno;
584
585	pthread_mutex_lock (&readdirlock);
586
587	e = readdir (dirp);
588	errorno = errno;
589
590	if (e)
591	{
592	*res = ent;
593	strcpy (ent->d_name, e->d_name);
594	}
595	else
596	*res = 0;
597
598	pthread_mutex_unlock (&readdirlock);
599
600	errno = errorno;
601	return e ? 0 : -1;
602	}
603	#endif
604
605	/* sendfile always needs emulation */
606	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
607	{
608	ssize_t res;
609
610	if (!count)
611	return 0;
612
613	#if HAVE_SENDFILE
614	# if __linux
615	res = sendfile (ofd, ifd, &offset, count);
616
617	# elif __freebsd
618	/*
619	* Of course, the freebsd sendfile is a dire hack with no thoughts
620	* wasted on making it similar to other I/O functions.
621	*/
622	{
623	off_t sbytes;
624	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
625
626	if (res < 0 && sbytes)
627	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
628	res = sbytes;
629	}
630
631	# elif __hpux
632	res = sendfile (ofd, ifd, offset, count, 0, 0);
633
634	# elif __solaris
635	{
636	struct sendfilevec vec;
637	size_t sbytes;
638
639	vec.sfv_fd = ifd;
640	vec.sfv_flag = 0;
641	vec.sfv_off = offset;
642	vec.sfv_len = count;
643
644	res = sendfilev (ofd, &vec, 1, &sbytes);
645
646	if (res < 0 && sbytes)
647	res = sbytes;
648	}
649
650	# endif
651	#else
652	res = -1;
653	errno = ENOSYS;
654	#endif
655
656	if (res < 0
657	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
658	#if __solaris
659	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
660	#endif
661	)
662	)
663	{
664	/* emulate sendfile. this is a major pain in the ass */
665	char buf[4096];
666	res = 0;
667
668	while (count)
669	{
670	ssize_t cnt;
671
672	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
673
674	if (cnt <= 0)
675	{
676	if (cnt && !res) res = -1;
677	break;
678	}
679
680	cnt = write (ofd, buf, cnt);
681
682	if (cnt <= 0)
683	{
684	if (cnt && !res) res = -1;
685	break;
686	}
687
688	offset += cnt;
689	res += cnt;
690	count -= cnt;
691	}
692	}
693
694	return res;
695	}
696
697	/* read a full directory */
698	static int scandir_ (const char *path, void **namesp)
699	{
700	DIR *dirp = opendir (path);
701	union
702	{
703	struct dirent d;
704	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
705	} u;
706	struct dirent *entp;
707	char *name, *names;
708	int memlen = 4096;
709	int memofs = 0;
710	int res = 0;
711	int errorno;
712
713	if (!dirp)
714	return -1;
715
716	names = malloc (memlen);
717
718	for (;;)
719	{
720	errno = 0, readdir_r (dirp, &u.d, &entp);
721
722	if (!entp)
723	break;
724
725	name = entp->d_name;
726
727	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
728	{
729	int len = strlen (name) + 1;
730
731	res++;
732
733	while (memofs + len > memlen)
734	{
735	memlen *= 2;
736	names = realloc (names, memlen);
737	if (!names)
738	break;
739	}
740
741	memcpy (names + memofs, name, len);
742	memofs += len;
743	}
744	}
745
746	errorno = errno;
747	closedir (dirp);
748
749	if (errorno)
750	{
751	free (names);
752	errno = errorno;
753	res = -1;
754	}
755
756	*namesp = (void *)names;
757	return res;
758	}
759
760	/*****************************************************************************/
761
762	static void *aio_proc (void *thr_arg)
763	{
764	aio_req req;
765	int type;
766
767	do
768	{
769	pthread_mutex_lock (&reqlock);
770
771	for (;;)
772	{
773	req = reqs;
774
775	if (reqs)
776	{
777	reqs = reqs->next;
778	if (!reqs) reqe = 0;
779	}
780
781	if (req)
782	break;
783
784	pthread_cond_wait (&reqwait, &reqlock);
785	}
786
787	pthread_mutex_unlock (&reqlock);
788
789	errno = 0; /* strictly unnecessary */
790
791	if (!req->cancelled)
792	switch (type = req->type) /* remember type for QUIT check */
793	{
794	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
795	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
796
797	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
798	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
799
800	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
801	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
802	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
803
804	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
805	case REQ_CLOSE: req->result = close (req->fd); break;
806	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
807	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
808	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
809	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
810	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
811
812	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
813	case REQ_FSYNC: req->result = fsync (req->fd); break;
814	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
815
816	case REQ_SLEEP:
817	{
818	struct timeval tv;
819
820	tv.tv_sec = req->fd;
821	tv.tv_usec = req->fd2;
822
823	req->result = select (0, 0, 0, 0, &tv);
824	}
825
826	case REQ_GROUP:
827	case REQ_NOP:
828	case REQ_QUIT:
829	break;
830
831	default:
832	req->result = ENOSYS;
833	break;
834	}
835
836	req->errorno = errno;
837
838	pthread_mutex_lock (&reslock);
839
840	req->next = 0;
841
842	if (rese)
843	{
844	rese->next = req;
845	rese = req;
846	}
847	else
848	{
849	rese = ress = req;
850
851	/* write a dummy byte to the pipe so fh becomes ready */
852	write (respipe [1], &respipe, 1);
853	}
854
855	pthread_mutex_unlock (&reslock);
856	}
857	while (type != REQ_QUIT);
858
859	return 0;
860	}
861
862	/*****************************************************************************/
863
864	static void atfork_prepare (void)
865	{
866	pthread_mutex_lock (&reqlock);
867	pthread_mutex_lock (&reslock);
868	#if !HAVE_PREADWRITE
869	pthread_mutex_lock (&preadwritelock);
870	#endif
871	#if !HAVE_READDIR_R
872	pthread_mutex_lock (&readdirlock);
873	#endif
874	}
875
876	static void atfork_parent (void)
877	{
878	#if !HAVE_READDIR_R
879	pthread_mutex_unlock (&readdirlock);
880	#endif
881	#if !HAVE_PREADWRITE
882	pthread_mutex_unlock (&preadwritelock);
883	#endif
884	pthread_mutex_unlock (&reslock);
885	pthread_mutex_unlock (&reqlock);
886	}	446	}
887		447
888	static void atfork_child (void)	448	static void atfork_child (void)
889	{	449	{
890	aio_req prv;
891
892	started = 0;
893
894	while (reqs)
895	{
896	prv = reqs;
897	reqs = prv->next;
898	req_free (prv);
899	}
900
901	reqs = reqe = 0;
902
903	while (ress)
904	{
905	prv = ress;
906	ress = prv->next;
907	req_free (prv);
908	}
909
910	ress = rese = 0;
911
912	close (respipe [0]);
913	close (respipe [1]);
914	create_pipe ();	450	create_respipe ();
915
916	atfork_parent ();
917	}	451	}
918		452
919	#define dREQ \	453	#define dREQ \
920	aio_req req; \	454	aio_req req; \
		455	int req_pri = next_pri; \
		456	next_pri = EIO_PRI_DEFAULT; \
921	\	457	\
922	if (SvOK (callback) && !SvROK (callback)) \	458	if (SvOK (callback) && !SvROK (callback)) \
923	croak ("callback must be undef or of reference type"); \	459	croak ("callback must be undef or of reference type"); \
924	\	460	\
925	Newz (0, req, 1, aio_cb); \	461	Newz (0, req, 1, eio_req); \
926	if (!req) \	462	if (!req) \
927	croak ("out of memory during aio_req allocation"); \	463	croak ("out of memory during eio_req allocation"); \
928	\	464	\
929	req->callback = newSVsv (callback)	465	req->callback = newSVsv (callback); \
		466	req->pri = req_pri
930		467
931	#define REQ_SEND \	468	#define REQ_SEND \
932	req_send (req); \	469	req_submit (req); \
933	\	470	\
934	if (GIMME_V != G_VOID) \	471	if (GIMME_V != G_VOID) \
935	XPUSHs (req_sv (req, AIO_REQ_KLASS));	472	XPUSHs (req_sv (req, AIO_REQ_KLASS));
936		473
937	MODULE = IO::AIO PACKAGE = IO::AIO	474	MODULE = IO::AIO PACKAGE = IO::AIO
938		475
939	PROTOTYPES: ENABLE	476	PROTOTYPES: ENABLE
940		477
941	BOOT:	478	BOOT:
942	{	479	{
943	HV *stash = gv_stashpv ("IO::AIO", 1);	480	stash = gv_stashpv ("IO::AIO", 1);
		481
944	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	482	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
945	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	483	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
946	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	484	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		485	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		486	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		487	#ifndef _WIN32
		488	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		489	#endif
947		490
948	create_pipe ();	491	create_respipe ();
949	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
950	}
951		492
		493	if (eio_init (want_poll, done_poll) < 0)
		494	croak ("IO::AIO: unable to initialise eio library");
		495
		496	/* atfork child called in fifo order, so before eio's handler */
		497	X_THREAD_ATFORK (0, 0, atfork_child);
		498	}
		499
952	void	500	void
953	min_parallel (nthreads)	501	max_poll_reqs (int nreqs)
954	int nthreads
955	PROTOTYPE: $	502	PROTOTYPE: $
		503	CODE:
		504	eio_set_max_poll_reqs (nreqs);
956		505
957	void	506	void
958	max_parallel (nthreads)	507	max_poll_time (double nseconds)
959	int nthreads
960	PROTOTYPE: $	508	PROTOTYPE: $
961
962	int
963	max_outstanding (nreqs)
964	int nreqs
965	PROTOTYPE: $
966	CODE:	509	CODE:
967	RETVAL = max_outstanding;	510	eio_set_max_poll_time (nseconds);
		511
		512	void
		513	min_parallel (int nthreads)
		514	PROTOTYPE: $
		515	CODE:
		516	eio_set_min_parallel (nthreads);
		517
		518	void
		519	max_parallel (int nthreads)
		520	PROTOTYPE: $
		521	CODE:
		522	eio_set_max_parallel (nthreads);
		523
		524	void
		525	max_idle (int nthreads)
		526	PROTOTYPE: $
		527	CODE:
		528	eio_set_max_idle (nthreads);
		529
		530	void
		531	max_outstanding (int maxreqs)
		532	PROTOTYPE: $
		533	CODE:
968	max_outstanding = nreqs;	534	max_outstanding = maxreqs;
969		535
970	void	536	void
971	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	537	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
972	SV * pathname
973	int flags
974	int mode
975	SV * callback
976	PROTOTYPE: $$$;$	538	PROTOTYPE: $$$;$
977	PPCODE:	539	PPCODE:
978	{	540	{
979	dREQ;	541	dREQ;
980		542
981	req->type = REQ_OPEN;	543	req->type = EIO_OPEN;
982	req->data = newSVsv (pathname);	544	req->sv1 = newSVsv (pathname);
983	req->dataptr = SvPVbyte_nolen (req->data);	545	req->ptr1 = SvPVbyte_nolen (req->sv1);
984	req->fd = flags;	546	req->int1 = flags;
985	req->mode = mode;	547	req->int2 = mode;
986		548
987	REQ_SEND;	549	REQ_SEND;
988	}	550	}
989		551
990	void	552	void
991	aio_close (fh,callback=&PL_sv_undef)	553	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
992	SV * fh
993	SV * callback
994	PROTOTYPE: $;$	554	PROTOTYPE: $;$
995	ALIAS:	555	ALIAS:
996	aio_close = REQ_CLOSE
997	aio_fsync = REQ_FSYNC	556	aio_fsync = EIO_FSYNC
998	aio_fdatasync = REQ_FDATASYNC	557	aio_fdatasync = EIO_FDATASYNC
999	PPCODE:	558	PPCODE:
1000	{	559	{
1001	dREQ;	560	dREQ;
1002		561
1003	req->type = ix;	562	req->type = ix;
1004	req->fh = newSVsv (fh);	563	req->sv1 = newSVsv (fh);
1005	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	564	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1006		565
1007	REQ_SEND (req);	566	REQ_SEND (req);
1008	}	567	}
1009		568
1010	void	569	void
		570	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		571	PROTOTYPE: $;$
		572	PPCODE:
		573	{
		574	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		575	dREQ;
		576
		577	if (close_pipe < 0)
		578	{
		579	int pipefd [2];
		580
		581	if (pipe (pipefd) < 0
		582	|| close (pipefd [1]) < 0
		583	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		584	abort (); /*D*/
		585
		586	close_pipe = pipefd [0];
		587	}
		588
		589	req->type = EIO_DUP2;
		590	req->int1 = close_pipe;
		591	req->sv2 = newSVsv (fh);
		592	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		593
		594	REQ_SEND (req);
		595	}
		596
		597	void
1011	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	598	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1012	SV * fh
1013	UV offset
1014	UV length
1015	SV * data
1016	UV dataoffset
1017	SV * callback
1018	ALIAS:	599	ALIAS:
1019	aio_read = REQ_READ	600	aio_read = EIO_READ
1020	aio_write = REQ_WRITE	601	aio_write = EIO_WRITE
1021	PROTOTYPE: $$$$$;$	602	PROTOTYPE: $$$$$;$
1022	PPCODE:	603	PPCODE:
1023	{	604	{
1024	aio_req req;
1025	STRLEN svlen;	605	STRLEN svlen;
1026	char *svptr = SvPVbyte (data, svlen);	606	char *svptr = SvPVbyte (data, svlen);
		607	UV len = SvUV (length);
1027		608
1028	SvUPGRADE (data, SVt_PV);	609	SvUPGRADE (data, SVt_PV);
1029	SvPOK_on (data);	610	SvPOK_on (data);
1030		611
1031	if (dataoffset < 0)	612	if (dataoffset < 0)
1032	dataoffset += svlen;	613	dataoffset += svlen;
1033		614
1034	if (dataoffset < 0 || dataoffset > svlen)	615	if (dataoffset < 0 || dataoffset > svlen)
1035	croak ("data offset outside of string");	616	croak ("dataoffset outside of data scalar");
1036		617
1037	if (ix == REQ_WRITE)	618	if (ix == EIO_WRITE)
1038	{	619	{
1039	/* write: check length and adjust. */	620	/* write: check length and adjust. */
1040	if (length < 0 || length + dataoffset > svlen)	621	if (!SvOK (length) || len + dataoffset > svlen)
1041	length = svlen - dataoffset;	622	len = svlen - dataoffset;
1042	}	623	}
1043	else	624	else
1044	{	625	{
1045	/* read: grow scalar as necessary */	626	/* read: grow scalar as necessary */
1046	svptr = SvGROW (data, length + dataoffset);	627	svptr = SvGROW (data, len + dataoffset + 1);
1047	}	628	}
1048		629
1049	if (length < 0)	630	if (len < 0)
1050	croak ("length must not be negative");	631	croak ("length must not be negative");
1051		632
1052	{	633	{
1053	dREQ;	634	dREQ;
1054		635
1055	req->type = ix;	636	req->type = ix;
1056	req->fh = newSVsv (fh);	637	req->sv1 = newSVsv (fh);
1057	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	638	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1058	: IoOFP (sv_2io (fh)));	639	: IoOFP (sv_2io (fh)));
		640	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1059	req->offset = offset;	641	req->size = len;
1060	req->length = length;
1061	req->data = SvREFCNT_inc (data);	642	req->sv2 = SvREFCNT_inc (data);
1062	req->dataptr = (char *)svptr + dataoffset;	643	req->ptr2 = (char *)svptr + dataoffset;
		644	req->stroffset = dataoffset;
1063		645
1064	if (!SvREADONLY (data))	646	if (!SvREADONLY (data))
1065	{	647	{
1066	SvREADONLY_on (data);	648	SvREADONLY_on (data);
1067	req->data2ptr = (void *)data;	649	req->flags |= FLAG_SV2_RO_OFF;
1068	}	650	}
1069		651
1070	REQ_SEND;	652	REQ_SEND;
1071	}	653	}
1072	}	654	}
1073		655
1074	void	656	void
		657	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		658	PROTOTYPE: $$;$
		659	PPCODE:
		660	{
		661	SV *data;
		662	dREQ;
		663
		664	req->type = EIO_READLINK;
		665	req->sv1 = newSVsv (path);
		666	req->ptr1 = SvPVbyte_nolen (req->sv1);
		667
		668	REQ_SEND;
		669	}
		670
		671	void
1075	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	672	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1076	SV * out_fh
1077	SV * in_fh
1078	UV in_offset
1079	UV length
1080	SV * callback
1081	PROTOTYPE: $$$$;$	673	PROTOTYPE: $$$$;$
1082	PPCODE:	674	PPCODE:
1083	{	675	{
1084	dREQ;	676	dREQ;
1085		677
1086	req->type = REQ_SENDFILE;	678	req->type = EIO_SENDFILE;
1087	req->fh = newSVsv (out_fh);	679	req->sv1 = newSVsv (out_fh);
1088	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	680	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1089	req->fh2 = newSVsv (in_fh);	681	req->sv2 = newSVsv (in_fh);
1090	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	682	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1091	req->offset = in_offset;	683	req->offs = SvVAL64 (in_offset);
1092	req->length = length;	684	req->size = length;
1093		685
1094	REQ_SEND;	686	REQ_SEND;
1095	}	687	}
1096		688
1097	void	689	void
1098	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	690	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1099	SV * fh
1100	UV offset
1101	IV length
1102	SV * callback
1103	PROTOTYPE: $$$;$	691	PROTOTYPE: $$$;$
1104	PPCODE:	692	PPCODE:
1105	{	693	{
1106	dREQ;	694	dREQ;
1107		695
1108	req->type = REQ_READAHEAD;	696	req->type = EIO_READAHEAD;
1109	req->fh = newSVsv (fh);	697	req->sv1 = newSVsv (fh);
1110	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	698	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1111	req->offset = offset;	699	req->offs = SvVAL64 (offset);
1112	req->length = length;	700	req->size = length;
1113		701
1114	REQ_SEND;	702	REQ_SEND;
1115	}	703	}
1116		704
1117	void	705	void
1118	aio_stat (fh_or_path,callback=&PL_sv_undef)	706	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1119	SV * fh_or_path
1120	SV * callback
1121	ALIAS:	707	ALIAS:
1122	aio_stat = REQ_STAT	708	aio_stat = EIO_STAT
1123	aio_lstat = REQ_LSTAT	709	aio_lstat = EIO_LSTAT
1124	PPCODE:	710	PPCODE:
1125	{	711	{
1126	dREQ;	712	dREQ;
1127		713
1128	New (0, req->statdata, 1, Stat_t);	714	req->sv1 = newSVsv (fh_or_path);
1129	if (!req->statdata)
1130	{
1131	req_free (req);
1132	croak ("out of memory during aio_req->statdata allocation");
1133	}
1134		715
1135	if (SvPOK (fh_or_path))	716	if (SvPOK (req->sv1))
1136	{	717	{
1137	req->type = ix;	718	req->type = ix;
1138	req->data = newSVsv (fh_or_path);
1139	req->dataptr = SvPVbyte_nolen (req->data);	719	req->ptr1 = SvPVbyte_nolen (req->sv1);
1140	}	720	}
1141	else	721	else
1142	{	722	{
1143	req->type = REQ_FSTAT;	723	req->type = EIO_FSTAT;
1144	req->fh = newSVsv (fh_or_path);
1145	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	724	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1146	}	725	}
1147		726
1148	REQ_SEND;	727	REQ_SEND;
1149	}	728	}
1150		729
1151	void	730	void
		731	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		732	PPCODE:
		733	{
		734	dREQ;
		735
		736	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		737	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		738	req->sv1 = newSVsv (fh_or_path);
		739
		740	if (SvPOK (req->sv1))
		741	{
		742	req->type = EIO_UTIME;
		743	req->ptr1 = SvPVbyte_nolen (req->sv1);
		744	}
		745	else
		746	{
		747	req->type = EIO_FUTIME;
		748	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		749	}
		750
		751	REQ_SEND;
		752	}
		753
		754	void
		755	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		756	PPCODE:
		757	{
		758	dREQ;
		759
		760	req->sv1 = newSVsv (fh_or_path);
		761	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		762
		763	if (SvPOK (req->sv1))
		764	{
		765	req->type = EIO_TRUNCATE;
		766	req->ptr1 = SvPVbyte_nolen (req->sv1);
		767	}
		768	else
		769	{
		770	req->type = EIO_FTRUNCATE;
		771	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		772	}
		773
		774	REQ_SEND;
		775	}
		776
		777	void
		778	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		779	ALIAS:
		780	aio_chmod = EIO_CHMOD
		781	aio_mkdir = EIO_MKDIR
		782	PPCODE:
		783	{
		784	dREQ;
		785
		786	req->int2 = mode;
		787	req->sv1 = newSVsv (fh_or_path);
		788
		789	if (SvPOK (req->sv1))
		790	{
		791	req->type = ix;
		792	req->ptr1 = SvPVbyte_nolen (req->sv1);
		793	}
		794	else
		795	{
		796	req->type = EIO_FCHMOD;
		797	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		798	}
		799
		800	REQ_SEND;
		801	}
		802
		803	void
		804	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		805	PPCODE:
		806	{
		807	dREQ;
		808
		809	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		810	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		811	req->sv1 = newSVsv (fh_or_path);
		812
		813	if (SvPOK (req->sv1))
		814	{
		815	req->type = EIO_CHOWN;
		816	req->ptr1 = SvPVbyte_nolen (req->sv1);
		817	}
		818	else
		819	{
		820	req->type = EIO_FCHOWN;
		821	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		822	}
		823
		824	REQ_SEND;
		825	}
		826
		827	void
1152	aio_unlink (pathname,callback=&PL_sv_undef)	828	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1153	SV * pathname
1154	SV * callback
1155	ALIAS:	829	ALIAS:
1156	aio_unlink = REQ_UNLINK	830	aio_unlink = EIO_UNLINK
1157	aio_rmdir = REQ_RMDIR	831	aio_rmdir = EIO_RMDIR
1158	aio_readdir = REQ_READDIR	832	aio_readdir = EIO_READDIR
1159	PPCODE:	833	PPCODE:
1160	{	834	{
1161	dREQ;	835	dREQ;
1162		836
1163	req->type = ix;	837	req->type = ix;
1164	req->data = newSVsv (pathname);	838	req->sv1 = newSVsv (pathname);
1165	req->dataptr = SvPVbyte_nolen (req->data);	839	req->ptr1 = SvPVbyte_nolen (req->sv1);
		840
		841	REQ_SEND;
		842	}
		843
		844	void
		845	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		846	ALIAS:
		847	aio_link = EIO_LINK
		848	aio_symlink = EIO_SYMLINK
		849	aio_rename = EIO_RENAME
		850	PPCODE:
		851	{
		852	dREQ;
		853
		854	req->type = ix;
		855	req->sv1 = newSVsv (oldpath);
		856	req->ptr1 = SvPVbyte_nolen (req->sv1);
		857	req->sv2 = newSVsv (newpath);
		858	req->ptr2 = SvPVbyte_nolen (req->sv2);
1166		859
1167	REQ_SEND;	860	REQ_SEND;
1168	}	861	}
1169		862
1170	void	863	void
1171	aio_link (oldpath,newpath,callback=&PL_sv_undef)	864	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1172	SV * oldpath
1173	SV * newpath
1174	SV * callback
1175	ALIAS:
1176	aio_link = REQ_LINK
1177	aio_symlink = REQ_SYMLINK
1178	aio_rename = REQ_RENAME
1179	PPCODE:	865	PPCODE:
1180	{	866	{
1181	dREQ;	867	dREQ;
1182		868
1183	req->type = ix;	869	req->type = EIO_MKNOD;
1184	req->fh = newSVsv (oldpath);	870	req->sv1 = newSVsv (pathname);
1185	req->data2ptr = SvPVbyte_nolen (req->fh);	871	req->ptr1 = SvPVbyte_nolen (req->sv1);
1186	req->data = newSVsv (newpath);	872	req->int2 = (mode_t)mode;
1187	req->dataptr = SvPVbyte_nolen (req->data);	873	req->offs = dev;
1188		874
1189	REQ_SEND;	875	REQ_SEND;
1190	}	876	}
1191		877
1192	void	878	void
1193	aio_sleep (delay,callback=&PL_sv_undef)	879	aio_busy (double delay, SV *callback=&PL_sv_undef)
1194	double delay
1195	SV * callback
1196	PPCODE:	880	PPCODE:
1197	{	881	{
1198	dREQ;	882	dREQ;
1199		883
1200	req->type = REQ_SLEEP;	884	req->type = EIO_BUSY;
1201	req->fd = delay < 0. ? 0 : delay;	885	req->nv1 = delay < 0. ? 0. : delay;
1202	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1203		886
1204	REQ_SEND;	887	REQ_SEND;
1205	}	888	}
1206		889
1207	void	890	void
1208	aio_group (callback=&PL_sv_undef)	891	aio_group (SV *callback=&PL_sv_undef)
1209	SV * callback
1210	PROTOTYPE: ;$	892	PROTOTYPE: ;$
1211	PPCODE:	893	PPCODE:
1212	{	894	{
1213	dREQ;	895	dREQ;
		896
1214	req->type = REQ_GROUP;	897	req->type = EIO_GROUP;
		898
1215	req_send (req);	899	eio_submit (req);
1216	XPUSHs (req_sv (req, AIO_GRP_KLASS));	900	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1217	}	901	}
1218		902
1219	void	903	void
1220	aio_nop (callback=&PL_sv_undef)	904	aio_nop (SV *callback=&PL_sv_undef)
1221	SV * callback	905	ALIAS:
		906	aio_nop = EIO_NOP
		907	aio_sync = EIO_SYNC
1222	PPCODE:	908	PPCODE:
1223	{	909	{
1224	dREQ;	910	dREQ;
1225		911
1226	req->type = REQ_NOP;	912	req->type = ix;
1227		913
1228	REQ_SEND;	914	REQ_SEND;
1229	}	915	}
		916
		917	int
		918	aioreq_pri (int pri = 0)
		919	PROTOTYPE: ;$
		920	CODE:
		921	RETVAL = next_pri;
		922	if (items > 0)
		923	{
		924	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		925	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		926	next_pri = pri;
		927	}
		928	OUTPUT:
		929	RETVAL
		930
		931	void
		932	aioreq_nice (int nice = 0)
		933	CODE:
		934	nice = next_pri - nice;
		935	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		936	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		937	next_pri = nice;
1230		938
1231	void	939	void
1232	flush ()	940	flush ()
1233	PROTOTYPE:	941	PROTOTYPE:
1234	CODE:	942	CODE:
1235	while (nreqs)	943	while (eio_nreqs ())
1236	{	944	{
1237	poll_wait ();	945	poll_wait ();
1238	poll_cb ();	946	poll_cb ();
1239	}	947	}
1240		948
1241	void	949	int
1242	poll()	950	poll()
1243	PROTOTYPE:	951	PROTOTYPE:
1244	CODE:	952	CODE:
1245	if (nreqs)
1246	{
1247	poll_wait ();	953	poll_wait ();
1248	poll_cb ();	954	RETVAL = poll_cb ();
1249	}	955	OUTPUT:
		956	RETVAL
1250		957
1251	int	958	int
1252	poll_fileno()	959	poll_fileno()
1253	PROTOTYPE:	960	PROTOTYPE:
1254	CODE:	961	CODE:
…		…
1266		973
1267	void	974	void
1268	poll_wait()	975	poll_wait()
1269	PROTOTYPE:	976	PROTOTYPE:
1270	CODE:	977	CODE:
1271	if (nreqs)
1272	poll_wait ();	978	poll_wait ();
1273		979
1274	int	980	int
1275	nreqs()	981	nreqs()
1276	PROTOTYPE:	982	PROTOTYPE:
1277	CODE:	983	CODE:
1278	RETVAL = nreqs;	984	RETVAL = eio_nreqs ();
1279	OUTPUT:	985	OUTPUT:
1280	RETVAL	986	RETVAL
1281		987
		988	int
		989	nready()
		990	PROTOTYPE:
		991	CODE:
		992	RETVAL = eio_nready ();
		993	OUTPUT:
		994	RETVAL
		995
		996	int
		997	npending()
		998	PROTOTYPE:
		999	CODE:
		1000	RETVAL = eio_npending ();
		1001	OUTPUT:
		1002	RETVAL
		1003
		1004	int
		1005	nthreads()
		1006	PROTOTYPE:
		1007	CODE:
		1008	RETVAL = eio_nthreads ();
		1009	OUTPUT:
		1010	RETVAL
		1011
		1012	void _on_next_submit (SV *cb)
		1013	CODE:
		1014	SvREFCNT_dec (on_next_submit);
		1015	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1016
1282	PROTOTYPES: DISABLE	1017	PROTOTYPES: DISABLE
1283		1018
1284	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1019	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1285		1020
1286	void	1021	void
1287	cancel (aio_req_ornot req)	1022	cancel (aio_req_ornot req)
1288	PROTOTYPE:
1289	CODE:	1023	CODE:
1290	req_cancel (req);	1024	eio_cancel (req);
1291		1025
1292	void	1026	void
1293	cb (aio_req req, SV *callback=&PL_sv_undef)	1027	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1294	CODE:	1028	CODE:
1295	SvREFCNT_dec (req->callback);	1029	SvREFCNT_dec (req->callback);
1296	req->callback = newSVsv (callback);	1030	req->callback = newSVsv (callback);
1297		1031
1298	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1032	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
…		…
1300	void	1034	void
1301	add (aio_req grp, ...)	1035	add (aio_req grp, ...)
1302	PPCODE:	1036	PPCODE:
1303	{	1037	{
1304	int i;	1038	int i;
1305	aio_req req;
1306		1039
1307	if (grp->fd == 2)	1040	if (grp->int1 == 2)
1308	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1041	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1309		1042
1310	for (i = 1; i < items; ++i )	1043	for (i = 1; i < items; ++i )
1311	{	1044	{
		1045	aio_req req;
		1046
1312	if (GIMME_V != G_VOID)	1047	if (GIMME_V != G_VOID)
1313	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1048	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1314		1049
1315	req = SvAIO_REQ (ST (i));	1050	req = SvAIO_REQ (ST (i));
1316		1051
1317	if (req)	1052	if (req)
1318	{	1053	eio_grp_add (grp, req);
1319	++grp->length;
1320	req->grp = grp;
1321
1322	req->grp_prev = 0;
1323	req->grp_next = grp->grp_first;
1324
1325	if (grp->grp_first)
1326	grp->grp_first->grp_prev = req;
1327
1328	grp->grp_first = req;
1329	}	1054	}
1330	}
1331	}	1055	}
		1056
		1057	void
		1058	cancel_subs (aio_req_ornot req)
		1059	CODE:
		1060	req_cancel_subs (req);
1332		1061
1333	void	1062	void
1334	result (aio_req grp, ...)	1063	result (aio_req grp, ...)
1335	CODE:	1064	CODE:
1336	{	1065	{
1337	int i;	1066	int i;
		1067	AV *av;
		1068
		1069	grp->errorno = errno;
		1070
1338	AV *av = newAV ();	1071	av = newAV ();
1339		1072
1340	for (i = 1; i < items; ++i )	1073	for (i = 1; i < items; ++i )
1341	av_push (av, newSVsv (ST (i)));	1074	av_push (av, newSVsv (ST (i)));
1342		1075
1343	SvREFCNT_dec (grp->data);	1076	SvREFCNT_dec (grp->sv1);
1344	grp->data = (SV *)av;	1077	grp->sv1 = (SV *)av;
1345	}	1078	}
1346		1079
1347	void	1080	void
		1081	errno (aio_req grp, int errorno = errno)
		1082	CODE:
		1083	grp->errorno = errorno;
		1084
		1085	void
1348	feed_limit (aio_req grp, int limit)	1086	limit (aio_req grp, int limit)
1349	CODE:	1087	CODE:
1350	grp->fd2 = limit;	1088	eio_grp_limit (grp, limit);
1351	aio_grp_feed (grp);
1352		1089
1353	void	1090	void
1354	feed (aio_req grp, SV *callback=&PL_sv_undef)	1091	feed (aio_req grp, SV *callback=&PL_sv_undef)
1355	CODE:	1092	CODE:
1356	{	1093	{
1357	SvREFCNT_dec (grp->fh2);	1094	SvREFCNT_dec (grp->sv2);
1358	grp->fh2 = newSVsv (callback);	1095	grp->sv2 = newSVsv (callback);
1359		1096
1360	if (grp->fd2 <= 0)	1097	if (grp->int2 <= 0)
1361	grp->fd2 = 2;	1098	grp->int2 = 2;
1362		1099
1363	aio_grp_feed (grp);	1100	eio_grp_limit (grp, grp->int2);
1364	}	1101	}
1365		1102

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