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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.48 by root, Sun Oct 22 10:33:19 2006 UTC vs.
Revision 1.117 by root, Sat May 10 20:02:09 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	#ifdef _WIN32
25	# if __linux	19
26	# include <sys/sendfile.h>	20	# define EIO_STRUCT_DIRENT Direntry_t
27	# elif __freebsd	21	# undef malloc
28	# include <sys/socket.h>	22	# undef free
29	# include <sys/uio.h>	23
30	# elif __hpux	24	// perl overrides all those nice win32 functions
31	# include <sys/socket.h>	25	# undef open
32	# elif __solaris /* not yet */	26	# undef read
33	# include <sys/sendfile.h>	27	# undef write
		28	# undef send
		29	# undef recv
		30	# undef stat
		31	# undef fstat
		32	# define lstat stat
		33	# undef truncate
		34	# undef ftruncate
		35	# undef open
		36	# undef close
		37	# undef unlink
		38	# undef rmdir
		39	# undef rename
		40	# undef lseek
		41
		42	# define chown(a,b,c) (errno = ENOSYS, -1)
		43	# define fchown(a,b,c) (errno = ENOSYS, -1)
		44	# define fchmod(a,b) (errno = ENOSYS, -1)
		45	# define symlink(a,b) (errno = ENOSYS, -1)
		46	# define readlink(a,b,c) (errno = ENOSYS, -1)
		47	# define mknod(a,b,c) (errno = ENOSYS, -1)
		48	# define truncate(a,b) (errno = ENOSYS, -1)
		49	# define ftruncate(fd,o) chsize ((fd), (o))
		50	# define fsync(fd) _commit (fd)
		51	# define opendir(fd) (errno = ENOSYS, 0)
		52	# define readdir(fd) (errno = ENOSYS, -1)
		53	# define closedir(fd) (errno = ENOSYS, -1)
		54	# define mkdir(a,b) mkdir (a)
		55
34	# else	56	#else
35	# error sendfile support requested but not available	57
36	# endif	58	# include <sys/time.h>
		59	# include <sys/select.h>
		60	# include <unistd.h>
		61	# include <utime.h>
		62	# include <signal.h>
		63	# define EIO_STRUCT_DIRENT struct dirent
		64
37	#endif	65	#endif
38		66
39	/* used for struct dirent, AIX doesn't provide it */	67	#define EIO_STRUCT_STAT Stat_t
40	#ifndef NAME_MAX	68
41	# define NAME_MAX 4096	69	/* use NV for 32 bit perls as it allows larger offsets */
		70	#if IVSIZE >= 8
		71	# define SvVAL64 SvIV
		72	#else
		73	# define SvVAL64 SvNV
42	#endif	74	#endif
43		75
44	#if __ia64	76	static HV *stash;
45	# define STACKSIZE 65536	77	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_SLEEP,
61	REQ_GROUP,
62	};
63		78
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	79	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	80	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		81
67	typedef struct aio_cb	82	#define EIO_COMMON \
68	{
69	struct aio_cb *grp, *grp_prev, *grp_next;
70
71	struct aio_cb *volatile next;
72
73	SV *self; /* the perl counterpart of this request, if any */
74
75	SV *data, *callback;	83	SV *callback; \
76	SV *fh, *fh2;	84	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;	85	STRLEN stroffset; \
87	mode_t mode; /* open */	86	SV *self
88	unsigned char cancelled;
89	} aio_cb;
90		87
		88	#include "libeio/eio.h"
		89
		90	static int req_invoke (eio_req *req);
		91	#define EIO_FINISH(req) req_invoke (req)
		92	static void aio_grp_feed (eio_req *grp);
		93	#define EIO_FEED(req) aio_grp_feed (req)
		94	static void req_destroy (eio_req *grp);
		95	#define EIO_DESTROY(req) req_destroy (req)
		96
		97	enum {
		98	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		99	};
		100
		101	#include "libeio/eio.c"
		102
91	typedef aio_cb *aio_req;	103	typedef eio_req *aio_req;
92	typedef aio_cb *aio_req_ornot;	104	typedef eio_req *aio_req_ornot;
93		105
94	static int started, wanted;	106	static SV *on_next_submit;
95	static volatile int nreqs;	107	static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
96	static int max_outstanding = 1<<30;	108	static int max_outstanding;
97	static int respipe [2];
98		109
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	110	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		111
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	112	static void req_destroy (aio_req req);
104	static volatile aio_req ress, rese; /* queue start, queue end */
105
106	static void req_free (aio_req req);	113	static void req_cancel (aio_req req);
		114
		115	static void want_poll (void)
		116	{
		117	/* write a dummy byte to the pipe so fh becomes ready */
		118	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		119	}
		120
		121	static void done_poll (void)
		122	{
		123	/* read any signals sent by the worker threads */
		124	char buf [4];
		125	while (respipe_read (respipe [0], buf, 4) == 4)
		126	;
		127	}
107		128
108	/* must be called at most once */	129	/* must be called at most once */
109	static SV *req_sv (aio_req req, const char *klass)	130	static SV *req_sv (aio_req req, const char *klass)
110	{	131	{
		132	if (!req->self)
		133	{
111	req->self = (SV *)newHV ();	134	req->self = (SV *)newHV ();
112	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	135	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		136	}
113		137
114	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	138	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
115	}	139	}
116		140
117	static aio_req SvAIO_REQ (SV *sv)	141	static aio_req SvAIO_REQ (SV *sv)
118	{	142	{
		143	MAGIC *mg;
		144
119	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	145	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
120	croak ("object of class " AIO_REQ_KLASS " expected");	146	croak ("object of class " AIO_REQ_KLASS " expected");
121		147
122	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	148	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
123		149
124	return mg ? (aio_req)mg->mg_ptr : 0;	150	return mg ? (aio_req)mg->mg_ptr : 0;
125	}	151	}
126		152
127	static void poll_wait ()	153	static void aio_grp_feed (aio_req grp)
128	{	154	{
129	if (nreqs && !ress)	155	if (grp->sv2 && SvOK (grp->sv2))
130	{	156	{
131	fd_set rfd;	157	dSP;
132	FD_ZERO(&rfd);
133	FD_SET(respipe [0], &rfd);
134		158
135	select (respipe [0] + 1, &rfd, 0, 0, 0);	159	ENTER;
		160	SAVETMPS;
		161	PUSHMARK (SP);
		162	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		163	PUTBACK;
		164	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		165	SPAGAIN;
		166	FREETMPS;
		167	LEAVE;
136	}	168	}
137	}	169	}
138		170
		171	static void req_submit (eio_req *req)
		172	{
		173	eio_submit (req);
		174
		175	if (on_next_submit)
		176	{
		177	dSP;
		178	SV *cb = sv_2mortal (on_next_submit);
		179
		180	on_next_submit = 0;
		181
		182	PUSHMARK (SP);
		183	PUTBACK;
		184	call_sv (cb, G_DISCARD | G_EVAL);
		185	}
		186	}
		187
139	static void req_invoke (aio_req req)	188	static int req_invoke (eio_req *req)
140	{	189	{
141	dSP;	190	dSP;
142	int errorno = errno;
143		191
144	if (req->cancelled || !SvOK (req->callback))	192	if (req->flags & FLAG_SV2_RO_OFF)
145	return;	193	SvREADONLY_off (req->sv2);
146		194
147	errno = req->errorno;	195	if (!EIO_CANCELLED (req) && SvOK (req->callback))
148
149	ENTER;
150	PUSHMARK (SP);
151	EXTEND (SP, 1);
152
153	switch (req->type)
154	{	196	{
155	case REQ_READDIR:	197	ENTER;
		198	SAVETMPS;
		199	PUSHMARK (SP);
		200	EXTEND (SP, 1);
		201
		202	switch (req->type)
156	{	203	{
157	SV *rv = &PL_sv_undef;	204	case EIO_READDIR:
158
159	if (req->result >= 0)
160	{	205	{
161	char *buf = req->data2ptr;	206	SV *rv = &PL_sv_undef;
162	AV *av = newAV ();
163		207
164	while (req->result)	208	if (req->result >= 0)
165	{	209	{
		210	int i;
		211	char *buf = req->ptr2;
		212	AV *av = newAV ();
		213
		214	av_extend (av, req->result - 1);
		215
		216	for (i = 0; i < req->result; ++i)
		217	{
166	SV *sv = newSVpv (buf, 0);	218	SV *sv = newSVpv (buf, 0);
167		219
168	av_push (av, sv);	220	av_store (av, i, sv);
169	buf += SvCUR (sv) + 1;	221	buf += SvCUR (sv) + 1;
170	req->result--;	222	}
		223
		224	rv = sv_2mortal (newRV_noinc ((SV *)av));
171	}	225	}
172		226
173	rv = sv_2mortal (newRV_noinc ((SV *)av));	227	PUSHs (rv);
174	}	228	}
		229	break;
175		230
		231	case EIO_OPEN:
		232	{
		233	/* convert fd to fh */
		234	SV *fh = &PL_sv_undef;
		235
		236	if (req->result >= 0)
		237	{
		238	GV *gv = (GV *)sv_newmortal ();
		239	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		240	char sym [64];
		241	int symlen;
		242
		243	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		244	gv_init (gv, stash, sym, symlen, 0);
		245
		246	symlen = snprintf (
		247	sym,
		248	sizeof (sym),
		249	"%s&=%d",
		250	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		251	req->result
		252	);
		253
		254	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		255	fh = (SV *)gv;
		256	}
		257
176	PUSHs (rv);	258	PUSHs (fh);
		259	}
		260	break;
		261
		262	case EIO_GROUP:
		263	req->int1 = 2; /* mark group as finished */
		264
		265	if (req->sv1)
		266	{
		267	int i;
		268	AV *av = (AV *)req->sv1;
		269
		270	EXTEND (SP, AvFILL (av) + 1);
		271	for (i = 0; i <= AvFILL (av); ++i)
		272	PUSHs (*av_fetch (av, i, 0));
		273	}
		274	break;
		275
		276	case EIO_NOP:
		277	case EIO_BUSY:
		278	break;
		279
		280	case EIO_READLINK:
		281	if (req->result > 0)
		282	{
		283	SvCUR_set (req->sv2, req->result);
		284	*SvEND (req->sv2) = 0;
		285	PUSHs (req->sv2);
		286	}
		287	break;
		288
		289	case EIO_STAT:
		290	case EIO_LSTAT:
		291	case EIO_FSTAT:
		292	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		293	PL_laststatval = req->result;
		294	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		295	PUSHs (sv_2mortal (newSViv (req->result)));
		296	break;
		297
		298	case EIO_READ:
		299	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		300	*SvEND (req->sv2) = 0;
		301	PUSHs (sv_2mortal (newSViv (req->result)));
		302	break;
		303
		304	case EIO_DUP2:
		305	if (req->result > 0)
		306	req->result = 0;
		307	/* FALLTHROUGH */
		308
		309	default:
		310	PUSHs (sv_2mortal (newSViv (req->result)));
		311	break;
177	}	312	}
178	break;
179		313
180	case REQ_OPEN:	314	errno = req->errorno;
181	{
182	/* convert fd to fh */
183	SV *fh;
184		315
185	PUSHs (sv_2mortal (newSViv (req->result)));
186	PUTBACK;	316	PUTBACK;
187	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	317	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
188	SPAGAIN;	318	SPAGAIN;
189		319
190	fh = SvREFCNT_inc (POPs);	320	FREETMPS;
		321	LEAVE;
191		322
192	PUSHMARK (SP);	323	PUTBACK;
193	XPUSHs (sv_2mortal (fh));
194	}
195	break;
196
197	case REQ_GROUP:
198	if (req->data)
199	{
200	int i;
201	AV *av = (AV *)req->data;
202
203	EXTEND (SP, AvFILL (av) + 1);
204	for (i = 0; i <= AvFILL (av); ++i)
205	PUSHs (*av_fetch (av, i, 0));
206	}
207	break;
208
209	case REQ_SLEEP:
210	break;
211
212	default:
213	PUSHs (sv_2mortal (newSViv (req->result)));
214	break;
215	}	324	}
216		325
217		326	return !!SvTRUE (ERRSV);
218	PUTBACK;
219	call_sv (req->callback, G_VOID | G_EVAL);
220	SPAGAIN;
221
222	if (SvTRUE (ERRSV))
223	{
224	req_free (req);
225	croak (0);
226	}
227
228	LEAVE;
229
230	errno = errorno;
231	}	327	}
232		328
233	static void req_free (aio_req req)	329	static void req_destroy (aio_req req)
234	{	330	{
235	if (req->grp)
236	{
237	aio_req grp = req->grp;
238
239	/* unlink request */
240	req->grp_next->grp_prev = req->grp_prev;
241	req->grp_prev->grp_next = req->grp_next;
242
243	if (grp->grp_next == grp && grp->fd)
244	{
245	req_invoke (grp);
246	req_free (grp);
247	}
248	}
249
250	if (req->self)	331	if (req->self)
251	{	332	{
252	sv_unmagic (req->self, PERL_MAGIC_ext);	333	sv_unmagic (req->self, PERL_MAGIC_ext);
253	SvREFCNT_dec (req->self);	334	SvREFCNT_dec (req->self);
254	}	335	}
255		336
256	if (req->data)
257	SvREFCNT_dec (req->data);
258
259	if (req->fh)
260	SvREFCNT_dec (req->fh);	337	SvREFCNT_dec (req->sv1);
261
262	if (req->fh2)
263	SvREFCNT_dec (req->fh2);	338	SvREFCNT_dec (req->sv2);
264
265	if (req->statdata)
266	Safefree (req->statdata);
267
268	if (req->callback)
269	SvREFCNT_dec (req->callback);	339	SvREFCNT_dec (req->callback);
270
271	if (req->type == REQ_READDIR && req->result >= 0)
272	free (req->data2ptr);
273		340
274	Safefree (req);	341	Safefree (req);
275	}	342	}
276		343
277	static void req_cancel (aio_req req)	344	static void req_cancel_subs (aio_req grp)
278	{	345	{
279	req->cancelled = 1;	346	aio_req sub;
280		347
281	if (req->type == REQ_GROUP)	348	if (grp->type != EIO_GROUP)
		349	return;
		350
		351	SvREFCNT_dec (grp->sv2);
		352	grp->sv2 = 0;
		353
		354	eio_grp_cancel (grp);
		355	}
		356
		357	#ifdef USE_SOCKETS_AS_HANDLES
		358	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		359	#else
		360	# define TO_SOCKET(x) (x)
		361	#endif
		362
		363	static void
		364	create_respipe (void)
		365	{
		366	int old_readfd = respipe [0];
		367
		368	if (respipe [1] >= 0)
		369	respipe_close (TO_SOCKET (respipe [1]));
		370
		371	#ifdef _WIN32
		372	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		373	#else
		374	if (pipe (respipe))
		375	#endif
		376	croak ("unable to initialize result pipe");
		377
		378	if (old_readfd >= 0)
282	{	379	{
283	aio_req sub;	380	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		381	croak ("unable to initialize result pipe(2)");
284		382
285	for (sub = req->grp_next; sub != req; sub = sub->grp_next)	383	respipe_close (respipe [0]);
286	req_cancel (sub);	384	respipe [0] = old_readfd;
287	}	385	}
288	}
289		386
290	static int poll_cb ()	387	#ifdef _WIN32
291	{	388	int arg = 1;
292	dSP;	389	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
293	int count = 0;	390	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
294	int do_croak = 0;	391	#else
295	aio_req req;	392	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		393	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		394	#endif
		395	croak ("unable to initialize result pipe(3)");
296		396
297	for (;;)	397	respipe_osf [0] = TO_SOCKET (respipe [0]);
		398	respipe_osf [1] = TO_SOCKET (respipe [1]);
		399	}
		400
		401	static void poll_wait (void)
		402	{
		403	fd_set rfd;
		404
		405	while (eio_nreqs ())
298	{	406	{
299	pthread_mutex_lock (&reslock);	407	int size;
300	req = ress;
301		408
		409	X_LOCK (reslock);
		410	size = res_queue.size;
		411	X_UNLOCK (reslock);
		412
302	if (req)	413	if (size)
303	{
304	ress = req->next;
305
306	if (!ress)
307	{
308	/* read any signals sent by the worker threads */
309	char buf [32];
310	while (read (respipe [0], buf, 32) == 32)
311	;
312
313	rese = 0;
314	}
315	}
316
317	pthread_mutex_unlock (&reslock);
318
319	if (!req)
320	break;	414	return;
321		415
322	nreqs--;	416	maybe_start_thread ();
323		417
324	if (req->type == REQ_QUIT)	418	FD_ZERO (&rfd);
325	started--;	419	FD_SET (respipe [0], &rfd);
326	else if (req->type == REQ_GROUP && req->grp_next != req)
327	{
328	req->fd = 1; /* mark request as delayed */
329	continue;
330	}
331	else
332	{
333	if (req->type == REQ_READ)
334	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
335		420
336	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))	421	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
337	SvREADONLY_off (req->data);
338
339	if (req->statdata)
340	{
341	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
342	PL_laststatval = req->result;
343	PL_statcache = *(req->statdata);
344	}
345
346	req_invoke (req);
347
348	count++;
349	}
350
351	req_free (req);
352	}	422	}
353
354	return count;
355	}	423	}
356		424
357	static void *aio_proc(void *arg);	425	static int poll_cb (void)
358
359	static void start_thread (void)
360	{	426	{
361	sigset_t fullsigset, oldsigset;	427	int res;
362	pthread_t tid;
363	pthread_attr_t attr;
364		428
365	pthread_attr_init (&attr);	429	do
366	pthread_attr_setstacksize (&attr, STACKSIZE);
367	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
368
369	sigfillset (&fullsigset);
370	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
371
372	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
373	started++;
374
375	sigprocmask (SIG_SETMASK, &oldsigset, 0);
376	}
377
378	static void req_send (aio_req req)
379	{
380	while (started < wanted && nreqs >= started)
381	start_thread ();
382
383	nreqs++;
384
385	pthread_mutex_lock (&reqlock);
386
387	req->next = 0;
388
389	if (reqe)
390	{	430	{
391	reqe->next = req;	431	res = eio_poll ();
392	reqe = req;	432
		433	if (res > 0)
		434	croak (0);
393	}	435	}
394	else	436	while (max_outstanding && max_outstanding <= eio_nreqs ());
395	reqe = reqs = req;
396
397	pthread_cond_signal (&reqwait);
398	pthread_mutex_unlock (&reqlock);
399
400	if (nreqs > max_outstanding)
401	for (;;)
402	{
403	poll_cb ();
404
405	if (nreqs <= max_outstanding)
406	break;
407
408	poll_wait ();
409	}
410	}
411
412	static void end_thread (void)
413	{
414	aio_req req;
415	Newz (0, req, 1, aio_cb);
416	req->type = REQ_QUIT;
417
418	req_send (req);
419	}
420
421	static void min_parallel (int nthreads)
422	{
423	if (wanted < nthreads)
424	wanted = nthreads;
425	}
426
427	static void max_parallel (int nthreads)
428	{
429	int cur = started;
430
431	if (wanted > nthreads)
432	wanted = nthreads;
433
434	while (cur > wanted)
435	{
436	end_thread ();
437	cur--;
438	}
439
440	while (started > wanted)
441	{
442	poll_wait ();
443	poll_cb ();
444	}
445	}
446
447	static void create_pipe ()
448	{
449	if (pipe (respipe))
450	croak ("unable to initialize result pipe");
451
452	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
453	croak ("cannot set result pipe to nonblocking mode");
454
455	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
456	croak ("cannot set result pipe to nonblocking mode");
457	}
458
459	/*****************************************************************************/
460	/* work around various missing functions */
461
462	#if !HAVE_PREADWRITE
463	# define pread aio_pread
464	# define pwrite aio_pwrite
465
466	/*
467	* make our pread/pwrite safe against themselves, but not against
468	* normal read/write by using a mutex. slows down execution a lot,
469	* but that's your problem, not mine.
470	*/
471	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
472
473	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
474	{
475	ssize_t res;
476	off_t ooffset;
477
478	pthread_mutex_lock (&preadwritelock);
479	ooffset = lseek (fd, 0, SEEK_CUR);
480	lseek (fd, offset, SEEK_SET);
481	res = read (fd, buf, count);
482	lseek (fd, ooffset, SEEK_SET);
483	pthread_mutex_unlock (&preadwritelock);
484		437
485	return res;	438	return res;
486	}	439	}
487		440
488	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
489	{
490	ssize_t res;
491	off_t ooffset;
492
493	pthread_mutex_lock (&preadwritelock);
494	ooffset = lseek (fd, 0, SEEK_CUR);
495	lseek (fd, offset, SEEK_SET);
496	res = write (fd, buf, count);
497	lseek (fd, offset, SEEK_SET);
498	pthread_mutex_unlock (&preadwritelock);
499
500	return res;
501	}
502	#endif
503
504	#if !HAVE_FDATASYNC
505	# define fdatasync fsync
506	#endif
507
508	#if !HAVE_READAHEAD
509	# define readahead aio_readahead
510
511	static ssize_t readahead (int fd, off_t offset, size_t count)
512	{
513	char readahead_buf[4096];
514
515	while (count > 0)
516	{
517	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
518
519	pread (fd, readahead_buf, len, offset);
520	offset += len;
521	count -= len;
522	}
523
524	errno = 0;
525	}
526	#endif
527
528	#if !HAVE_READDIR_R
529	# define readdir_r aio_readdir_r
530
531	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
532
533	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
534	{
535	struct dirent *e;
536	int errorno;
537
538	pthread_mutex_lock (&readdirlock);
539
540	e = readdir (dirp);
541	errorno = errno;
542
543	if (e)
544	{
545	*res = ent;
546	strcpy (ent->d_name, e->d_name);
547	}
548	else
549	*res = 0;
550
551	pthread_mutex_unlock (&readdirlock);
552
553	errno = errorno;
554	return e ? 0 : -1;
555	}
556	#endif
557
558	/* sendfile always needs emulation */
559	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
560	{
561	ssize_t res;
562
563	if (!count)
564	return 0;
565
566	#if HAVE_SENDFILE
567	# if __linux
568	res = sendfile (ofd, ifd, &offset, count);
569
570	# elif __freebsd
571	/*
572	* Of course, the freebsd sendfile is a dire hack with no thoughts
573	* wasted on making it similar to other I/O functions.
574	*/
575	{
576	off_t sbytes;
577	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
578
579	if (res < 0 && sbytes)
580	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
581	res = sbytes;
582	}
583
584	# elif __hpux
585	res = sendfile (ofd, ifd, offset, count, 0, 0);
586
587	# elif __solaris
588	{
589	struct sendfilevec vec;
590	size_t sbytes;
591
592	vec.sfv_fd = ifd;
593	vec.sfv_flag = 0;
594	vec.sfv_off = offset;
595	vec.sfv_len = count;
596
597	res = sendfilev (ofd, &vec, 1, &sbytes);
598
599	if (res < 0 && sbytes)
600	res = sbytes;
601	}
602
603	# endif
604	#else
605	res = -1;
606	errno = ENOSYS;
607	#endif
608
609	if (res < 0
610	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
611	#if __solaris
612	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
613	#endif
614	)
615	)
616	{
617	/* emulate sendfile. this is a major pain in the ass */
618	char buf[4096];
619	res = 0;
620
621	while (count)
622	{
623	ssize_t cnt;
624
625	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
626
627	if (cnt <= 0)
628	{
629	if (cnt && !res) res = -1;
630	break;
631	}
632
633	cnt = write (ofd, buf, cnt);
634
635	if (cnt <= 0)
636	{
637	if (cnt && !res) res = -1;
638	break;
639	}
640
641	offset += cnt;
642	res += cnt;
643	count -= cnt;
644	}
645	}
646
647	return res;
648	}
649
650	/* read a full directory */
651	static int scandir_ (const char *path, void **namesp)
652	{
653	DIR *dirp = opendir (path);
654	union
655	{
656	struct dirent d;
657	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
658	} u;
659	struct dirent *entp;
660	char *name, *names;
661	int memlen = 4096;
662	int memofs = 0;
663	int res = 0;
664	int errorno;
665
666	if (!dirp)
667	return -1;
668
669	names = malloc (memlen);
670
671	for (;;)
672	{
673	errno = 0, readdir_r (dirp, &u.d, &entp);
674
675	if (!entp)
676	break;
677
678	name = entp->d_name;
679
680	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
681	{
682	int len = strlen (name) + 1;
683
684	res++;
685
686	while (memofs + len > memlen)
687	{
688	memlen *= 2;
689	names = realloc (names, memlen);
690	if (!names)
691	break;
692	}
693
694	memcpy (names + memofs, name, len);
695	memofs += len;
696	}
697	}
698
699	errorno = errno;
700	closedir (dirp);
701
702	if (errorno)
703	{
704	free (names);
705	errno = errorno;
706	res = -1;
707	}
708
709	*namesp = (void *)names;
710	return res;
711	}
712
713	/*****************************************************************************/
714
715	static void *aio_proc (void *thr_arg)
716	{
717	aio_req req;
718	int type;
719
720	do
721	{
722	pthread_mutex_lock (&reqlock);
723
724	for (;;)
725	{
726	req = reqs;
727
728	if (reqs)
729	{
730	reqs = reqs->next;
731	if (!reqs) reqe = 0;
732	}
733
734	if (req)
735	break;
736
737	pthread_cond_wait (&reqwait, &reqlock);
738	}
739
740	pthread_mutex_unlock (&reqlock);
741
742	errno = 0; /* strictly unnecessary */
743
744	if (!req->cancelled)
745	switch (req->type)
746	{
747	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
748	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
749
750	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
751	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
752
753	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
754	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
755	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
756
757	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
758	case REQ_CLOSE: req->result = close (req->fd); break;
759	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
760	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
761	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
762	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
763	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
764
765	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
766	case REQ_FSYNC: req->result = fsync (req->fd); break;
767	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
768
769	case REQ_SLEEP:
770	{
771	struct timeval tv;
772
773	tv.tv_sec = req->fd;
774	tv.tv_usec = req->fd2;
775
776	req->result = select (0, 0, 0, 0, &tv);
777	}
778
779	case REQ_QUIT:
780	break;
781
782	default:
783	req->result = ENOSYS;
784	break;
785	}
786
787	req->errorno = errno;
788
789	pthread_mutex_lock (&reslock);
790
791	req->next = 0;
792
793	if (rese)
794	{
795	rese->next = req;
796	rese = req;
797	}
798	else
799	{
800	rese = ress = req;
801
802	/* write a dummy byte to the pipe so fh becomes ready */
803	write (respipe [1], &respipe, 1);
804	}
805
806	pthread_mutex_unlock (&reslock);
807	}
808	while (type != REQ_QUIT);
809
810	return 0;
811	}
812
813	/*****************************************************************************/
814
815	static void atfork_prepare (void)
816	{
817	pthread_mutex_lock (&reqlock);
818	pthread_mutex_lock (&reslock);
819	#if !HAVE_PREADWRITE
820	pthread_mutex_lock (&preadwritelock);
821	#endif
822	#if !HAVE_READDIR_R
823	pthread_mutex_lock (&readdirlock);
824	#endif
825	}
826
827	static void atfork_parent (void)
828	{
829	#if !HAVE_READDIR_R
830	pthread_mutex_unlock (&readdirlock);
831	#endif
832	#if !HAVE_PREADWRITE
833	pthread_mutex_unlock (&preadwritelock);
834	#endif
835	pthread_mutex_unlock (&reslock);
836	pthread_mutex_unlock (&reqlock);
837	}
838
839	static void atfork_child (void)	441	static void atfork_child (void)
840	{	442	{
841	aio_req prv;
842
843	started = 0;
844
845	while (reqs)
846	{
847	prv = reqs;
848	reqs = prv->next;
849	req_free (prv);
850	}
851
852	reqs = reqe = 0;
853
854	while (ress)
855	{
856	prv = ress;
857	ress = prv->next;
858	req_free (prv);
859	}
860
861	ress = rese = 0;
862
863	close (respipe [0]);
864	close (respipe [1]);
865	create_pipe ();	443	create_respipe ();
866
867	atfork_parent ();
868	}	444	}
869		445
870	#define dREQ \	446	#define dREQ \
871	aio_req req; \	447	aio_req req; \
		448	int req_pri = next_pri; \
		449	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
872	\	450	\
873	if (SvOK (callback) && !SvROK (callback)) \	451	if (SvOK (callback) && !SvROK (callback)) \
874	croak ("callback must be undef or of reference type"); \	452	croak ("callback must be undef or of reference type"); \
875	\	453	\
876	Newz (0, req, 1, aio_cb); \	454	Newz (0, req, 1, eio_req); \
877	if (!req) \	455	if (!req) \
878	croak ("out of memory during aio_req allocation"); \	456	croak ("out of memory during eio_req allocation"); \
879	\	457	\
880	req->callback = newSVsv (callback)	458	req->callback = newSVsv (callback); \
		459	req->pri = req_pri
881		460
882	#define REQ_SEND \	461	#define REQ_SEND \
883	req_send (req); \	462	req_submit (req); \
884	\	463	\
885	if (GIMME_V != G_VOID) \	464	if (GIMME_V != G_VOID) \
886	XPUSHs (req_sv (req, AIO_REQ_KLASS));	465	XPUSHs (req_sv (req, AIO_REQ_KLASS));
887		466
888	MODULE = IO::AIO PACKAGE = IO::AIO	467	MODULE = IO::AIO PACKAGE = IO::AIO
889		468
890	PROTOTYPES: ENABLE	469	PROTOTYPES: ENABLE
891		470
892	BOOT:	471	BOOT:
893	{	472	{
894	HV *stash = gv_stashpv ("IO::AIO", 1);	473	stash = gv_stashpv ("IO::AIO", 1);
		474
895	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	475	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
896	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	476	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
897	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	477	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		478	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		479	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		480	#ifdef _WIN32
		481	X_MUTEX_CHECK (wrklock);
		482	X_MUTEX_CHECK (reslock);
		483	X_MUTEX_CHECK (reqlock);
		484	X_MUTEX_CHECK (reqwait);
		485	X_MUTEX_CHECK (preadwritelock);
		486	X_MUTEX_CHECK (readdirlock);
898		487
899	create_pipe ();	488	X_COND_CHECK (reqwait);
900	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	489	#else
901	}	490	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		491	#endif
902		492
		493	create_respipe ();
		494
		495	if (eio_init (want_poll, done_poll) < 0)
		496	croak ("IO::AIO: unable to initialise eio library");
		497
		498	/* atfork child called in fifo order, so before eio's handler */
		499	X_THREAD_ATFORK (0, 0, atfork_child);
		500	}
		501
903	void	502	void
904	min_parallel (nthreads)	503	max_poll_reqs (int nreqs)
905	int nthreads
906	PROTOTYPE: $	504	PROTOTYPE: $
		505	CODE:
		506	eio_set_max_poll_reqs (nreqs);
907		507
908	void	508	void
909	max_parallel (nthreads)	509	max_poll_time (double nseconds)
910	int nthreads
911	PROTOTYPE: $	510	PROTOTYPE: $
912
913	int
914	max_outstanding (nreqs)
915	int nreqs
916	PROTOTYPE: $
917	CODE:	511	CODE:
918	RETVAL = max_outstanding;	512	eio_set_max_poll_time (nseconds);
		513
		514	void
		515	min_parallel (int nthreads)
		516	PROTOTYPE: $
		517	CODE:
		518	eio_set_min_parallel (nthreads);
		519
		520	void
		521	max_parallel (int nthreads)
		522	PROTOTYPE: $
		523	CODE:
		524	eio_set_max_parallel (nthreads);
		525
		526	void
		527	max_idle (int nthreads)
		528	PROTOTYPE: $
		529	CODE:
		530	eio_set_max_idle (nthreads);
		531
		532	void
		533	max_outstanding (int maxreqs)
		534	PROTOTYPE: $
		535	CODE:
919	max_outstanding = nreqs;	536	max_outstanding = maxreqs;
920		537
921	void	538	void
922	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	539	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
923	SV * pathname
924	int flags
925	int mode
926	SV * callback
927	PROTOTYPE: $$$;$	540	PROTOTYPE: $$$;$
928	PPCODE:	541	PPCODE:
929	{	542	{
930	dREQ;	543	dREQ;
931		544
932	req->type = REQ_OPEN;	545	req->type = EIO_OPEN;
933	req->data = newSVsv (pathname);	546	req->sv1 = newSVsv (pathname);
934	req->dataptr = SvPVbyte_nolen (req->data);	547	req->ptr1 = SvPVbyte_nolen (req->sv1);
935	req->fd = flags;	548	req->int1 = flags;
936	req->mode = mode;	549	req->int2 = mode;
937		550
938	REQ_SEND;	551	REQ_SEND;
939	}	552	}
940		553
941	void	554	void
942	aio_close (fh,callback=&PL_sv_undef)	555	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
943	SV * fh
944	SV * callback
945	PROTOTYPE: $;$	556	PROTOTYPE: $;$
946	ALIAS:	557	ALIAS:
947	aio_close = REQ_CLOSE
948	aio_fsync = REQ_FSYNC	558	aio_fsync = EIO_FSYNC
949	aio_fdatasync = REQ_FDATASYNC	559	aio_fdatasync = EIO_FDATASYNC
950	PPCODE:	560	PPCODE:
951	{	561	{
952	dREQ;	562	dREQ;
953		563
954	req->type = ix;	564	req->type = ix;
955	req->fh = newSVsv (fh);	565	req->sv1 = newSVsv (fh);
956	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	566	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
957		567
958	REQ_SEND (req);	568	REQ_SEND (req);
959	}	569	}
960		570
961	void	571	void
		572	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		573	PROTOTYPE: $;$
		574	PPCODE:
		575	{
		576	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		577	dREQ;
		578
		579	if (close_pipe < 0)
		580	{
		581	int pipefd [2];
		582
		583	if (pipe (pipefd) < 0
		584	|| close (pipefd [1]) < 0
		585	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		586	abort (); /*D*/
		587
		588	close_pipe = pipefd [0];
		589	}
		590
		591	req->type = EIO_DUP2;
		592	req->int1 = close_pipe;
		593	req->sv2 = newSVsv (fh);
		594	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		595
		596	REQ_SEND (req);
		597	}
		598
		599	void
962	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	600	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
963	SV * fh
964	UV offset
965	UV length
966	SV * data
967	UV dataoffset
968	SV * callback
969	ALIAS:	601	ALIAS:
970	aio_read = REQ_READ	602	aio_read = EIO_READ
971	aio_write = REQ_WRITE	603	aio_write = EIO_WRITE
972	PROTOTYPE: $$$$$;$	604	PROTOTYPE: $$$$$;$
973	PPCODE:	605	PPCODE:
974	{	606	{
975	aio_req req;
976	STRLEN svlen;	607	STRLEN svlen;
977	char *svptr = SvPVbyte (data, svlen);	608	char *svptr = SvPVbyte (data, svlen);
		609	UV len = SvUV (length);
978		610
979	SvUPGRADE (data, SVt_PV);	611	SvUPGRADE (data, SVt_PV);
980	SvPOK_on (data);	612	SvPOK_on (data);
981		613
982	if (dataoffset < 0)	614	if (dataoffset < 0)
983	dataoffset += svlen;	615	dataoffset += svlen;
984		616
985	if (dataoffset < 0 || dataoffset > svlen)	617	if (dataoffset < 0 || dataoffset > svlen)
986	croak ("data offset outside of string");	618	croak ("dataoffset outside of data scalar");
987		619
988	if (ix == REQ_WRITE)	620	if (ix == EIO_WRITE)
989	{	621	{
990	/* write: check length and adjust. */	622	/* write: check length and adjust. */
991	if (length < 0 || length + dataoffset > svlen)	623	if (!SvOK (length) || len + dataoffset > svlen)
992	length = svlen - dataoffset;	624	len = svlen - dataoffset;
993	}	625	}
994	else	626	else
995	{	627	{
996	/* read: grow scalar as necessary */	628	/* read: grow scalar as necessary */
997	svptr = SvGROW (data, length + dataoffset);	629	svptr = SvGROW (data, len + dataoffset + 1);
998	}	630	}
999		631
1000	if (length < 0)	632	if (len < 0)
1001	croak ("length must not be negative");	633	croak ("length must not be negative");
1002		634
1003	{	635	{
1004	dREQ;	636	dREQ;
1005		637
1006	req->type = ix;	638	req->type = ix;
1007	req->fh = newSVsv (fh);	639	req->sv1 = newSVsv (fh);
1008	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	640	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1009	: IoOFP (sv_2io (fh)));	641	: IoOFP (sv_2io (fh)));
		642	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1010	req->offset = offset;	643	req->size = len;
1011	req->length = length;
1012	req->data = SvREFCNT_inc (data);	644	req->sv2 = SvREFCNT_inc (data);
1013	req->dataptr = (char *)svptr + dataoffset;	645	req->ptr2 = (char *)svptr + dataoffset;
		646	req->stroffset = dataoffset;
1014		647
1015	if (!SvREADONLY (data))	648	if (!SvREADONLY (data))
1016	{	649	{
1017	SvREADONLY_on (data);	650	SvREADONLY_on (data);
1018	req->data2ptr = (void *)data;	651	req->flags |= FLAG_SV2_RO_OFF;
1019	}	652	}
1020		653
1021	REQ_SEND;	654	REQ_SEND;
1022	}	655	}
1023	}	656	}
1024		657
1025	void	658	void
		659	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		660	PROTOTYPE: $$;$
		661	PPCODE:
		662	{
		663	SV *data;
		664	dREQ;
		665
		666	data = newSV (NAME_MAX);
		667	SvPOK_on (data);
		668
		669	req->type = EIO_READLINK;
		670	req->sv1 = newSVsv (path);
		671	req->ptr1 = SvPVbyte_nolen (req->sv1);
		672	req->sv2 = data;
		673	req->ptr2 = SvPVbyte_nolen (data);
		674
		675	REQ_SEND;
		676	}
		677
		678	void
1026	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	679	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1027	SV * out_fh
1028	SV * in_fh
1029	UV in_offset
1030	UV length
1031	SV * callback
1032	PROTOTYPE: $$$$;$	680	PROTOTYPE: $$$$;$
1033	PPCODE:	681	PPCODE:
1034	{	682	{
1035	dREQ;	683	dREQ;
1036		684
1037	req->type = REQ_SENDFILE;	685	req->type = EIO_SENDFILE;
1038	req->fh = newSVsv (out_fh);	686	req->sv1 = newSVsv (out_fh);
1039	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	687	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1040	req->fh2 = newSVsv (in_fh);	688	req->sv2 = newSVsv (in_fh);
1041	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	689	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1042	req->offset = in_offset;	690	req->offs = SvVAL64 (in_offset);
1043	req->length = length;	691	req->size = length;
1044		692
1045	REQ_SEND;	693	REQ_SEND;
1046	}	694	}
1047		695
1048	void	696	void
1049	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	697	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1050	SV * fh
1051	UV offset
1052	IV length
1053	SV * callback
1054	PROTOTYPE: $$$;$	698	PROTOTYPE: $$$;$
1055	PPCODE:	699	PPCODE:
1056	{	700	{
1057	dREQ;	701	dREQ;
1058		702
1059	req->type = REQ_READAHEAD;	703	req->type = EIO_READAHEAD;
1060	req->fh = newSVsv (fh);	704	req->sv1 = newSVsv (fh);
1061	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	705	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1062	req->offset = offset;	706	req->offs = SvVAL64 (offset);
1063	req->length = length;	707	req->size = length;
1064		708
1065	REQ_SEND;	709	REQ_SEND;
1066	}	710	}
1067		711
1068	void	712	void
1069	aio_stat (fh_or_path,callback=&PL_sv_undef)	713	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1070	SV * fh_or_path
1071	SV * callback
1072	ALIAS:	714	ALIAS:
1073	aio_stat = REQ_STAT	715	aio_stat = EIO_STAT
1074	aio_lstat = REQ_LSTAT	716	aio_lstat = EIO_LSTAT
1075	PPCODE:	717	PPCODE:
1076	{	718	{
1077	dREQ;	719	dREQ;
1078		720
1079	New (0, req->statdata, 1, Stat_t);	721	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1080	if (!req->statdata)	722	if (!req->ptr2)
1081	{	723	{
1082	req_free (req);	724	req_destroy (req);
1083	croak ("out of memory during aio_req->statdata allocation");	725	croak ("out of memory during aio_stat statdata allocation");
1084	}	726	}
		727
		728	req->flags |= EIO_FLAG_PTR2_FREE;
		729	req->sv1 = newSVsv (fh_or_path);
1085		730
1086	if (SvPOK (fh_or_path))	731	if (SvPOK (fh_or_path))
1087	{	732	{
1088	req->type = ix;	733	req->type = ix;
1089	req->data = newSVsv (fh_or_path);
1090	req->dataptr = SvPVbyte_nolen (req->data);	734	req->ptr1 = SvPVbyte_nolen (req->sv1);
1091	}	735	}
1092	else	736	else
1093	{	737	{
1094	req->type = REQ_FSTAT;	738	req->type = EIO_FSTAT;
1095	req->fh = newSVsv (fh_or_path);
1096	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	739	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1097	}	740	}
1098		741
1099	REQ_SEND;	742	REQ_SEND;
1100	}	743	}
1101		744
1102	void	745	void
		746	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		747	PPCODE:
		748	{
		749	dREQ;
		750
		751	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		752	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		753	req->sv1 = newSVsv (fh_or_path);
		754
		755	if (SvPOK (fh_or_path))
		756	{
		757	req->type = EIO_UTIME;
		758	req->ptr1 = SvPVbyte_nolen (req->sv1);
		759	}
		760	else
		761	{
		762	req->type = EIO_FUTIME;
		763	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		764	}
		765
		766	REQ_SEND;
		767	}
		768
		769	void
		770	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		771	PPCODE:
		772	{
		773	dREQ;
		774
		775	req->sv1 = newSVsv (fh_or_path);
		776	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		777
		778	if (SvPOK (fh_or_path))
		779	{
		780	req->type = EIO_TRUNCATE;
		781	req->ptr1 = SvPVbyte_nolen (req->sv1);
		782	}
		783	else
		784	{
		785	req->type = EIO_FTRUNCATE;
		786	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		787	}
		788
		789	REQ_SEND;
		790	}
		791
		792	void
		793	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		794	ALIAS:
		795	aio_chmod = EIO_CHMOD
		796	aio_fchmod = EIO_FCHMOD
		797	aio_mkdir = EIO_MKDIR
		798	PPCODE:
		799	{
		800	dREQ;
		801
		802	req->type = ix;
		803	req->int2 = mode;
		804	req->sv1 = newSVsv (fh_or_path);
		805
		806	if (ix == EIO_FCHMOD)
		807	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		808	else
		809	req->ptr1 = SvPVbyte_nolen (req->sv1);
		810
		811	REQ_SEND;
		812	}
		813
		814	void
		815	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		816	PPCODE:
		817	{
		818	dREQ;
		819
		820	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		821	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		822	req->sv1 = newSVsv (fh_or_path);
		823
		824	if (SvPOK (fh_or_path))
		825	{
		826	req->type = EIO_CHOWN;
		827	req->ptr1 = SvPVbyte_nolen (req->sv1);
		828	}
		829	else
		830	{
		831	req->type = EIO_FCHOWN;
		832	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		833	}
		834
		835	REQ_SEND;
		836	}
		837
		838	void
1103	aio_unlink (pathname,callback=&PL_sv_undef)	839	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1104	SV * pathname
1105	SV * callback
1106	ALIAS:	840	ALIAS:
1107	aio_unlink = REQ_UNLINK	841	aio_unlink = EIO_UNLINK
1108	aio_rmdir = REQ_RMDIR	842	aio_rmdir = EIO_RMDIR
1109	aio_readdir = REQ_READDIR	843	aio_readdir = EIO_READDIR
1110	PPCODE:	844	PPCODE:
1111	{	845	{
1112	dREQ;	846	dREQ;
1113		847
1114	req->type = ix;	848	req->type = ix;
1115	req->data = newSVsv (pathname);	849	req->sv1 = newSVsv (pathname);
1116	req->dataptr = SvPVbyte_nolen (req->data);	850	req->ptr1 = SvPVbyte_nolen (req->sv1);
		851
		852	REQ_SEND;
		853	}
		854
		855	void
		856	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		857	ALIAS:
		858	aio_link = EIO_LINK
		859	aio_symlink = EIO_SYMLINK
		860	aio_rename = EIO_RENAME
		861	PPCODE:
		862	{
		863	dREQ;
		864
		865	req->type = ix;
		866	req->sv1 = newSVsv (oldpath);
		867	req->ptr1 = SvPVbyte_nolen (req->sv1);
		868	req->sv2 = newSVsv (newpath);
		869	req->ptr2 = SvPVbyte_nolen (req->sv2);
1117		870
1118	REQ_SEND;	871	REQ_SEND;
1119	}	872	}
1120		873
1121	void	874	void
1122	aio_link (oldpath,newpath,callback=&PL_sv_undef)	875	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1123	SV * oldpath
1124	SV * newpath
1125	SV * callback
1126	ALIAS:
1127	aio_link = REQ_LINK
1128	aio_symlink = REQ_SYMLINK
1129	aio_rename = REQ_RENAME
1130	PPCODE:	876	PPCODE:
1131	{	877	{
1132	dREQ;	878	dREQ;
1133		879
1134	req->type = ix;	880	req->type = EIO_MKNOD;
1135	req->fh = newSVsv (oldpath);	881	req->sv1 = newSVsv (pathname);
1136	req->data2ptr = SvPVbyte_nolen (req->fh);	882	req->ptr1 = SvPVbyte_nolen (req->sv1);
1137	req->data = newSVsv (newpath);	883	req->int2 = (mode_t)mode;
1138	req->dataptr = SvPVbyte_nolen (req->data);	884	req->offs = dev;
1139		885
1140	REQ_SEND;	886	REQ_SEND;
1141	}	887	}
1142		888
1143	void	889	void
1144	aio_sleep (delay,callback=&PL_sv_undef)	890	aio_busy (double delay, SV *callback=&PL_sv_undef)
1145	double delay
1146	SV * callback
1147	PPCODE:	891	PPCODE:
1148	{	892	{
1149	dREQ;	893	dREQ;
1150		894
1151	req->type = REQ_SLEEP;	895	req->type = EIO_BUSY;
1152	req->fd = delay < 0. ? 0 : delay;	896	req->nv1 = delay < 0. ? 0. : delay;
1153	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1154		897
1155	REQ_SEND;	898	REQ_SEND;
1156	}	899	}
1157		900
1158	void	901	void
1159	aio_group (callback=&PL_sv_undef)	902	aio_group (SV *callback=&PL_sv_undef)
1160	SV * callback
1161	PROTOTYPE: ;$	903	PROTOTYPE: ;$
1162	PPCODE:	904	PPCODE:
1163	{	905	{
1164	dREQ;	906	dREQ;
		907
1165	req->type = REQ_GROUP;	908	req->type = EIO_GROUP;
1166	req->grp_next = req;
1167	req->grp_prev = req;
1168		909
1169	req_send (req);	910	eio_submit (req);
1170	XPUSHs (req_sv (req, AIO_GRP_KLASS));	911	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1171	}	912	}
		913
		914	void
		915	aio_nop (SV *callback=&PL_sv_undef)
		916	ALIAS:
		917	aio_nop = EIO_NOP
		918	aio_sync = EIO_SYNC
		919	PPCODE:
		920	{
		921	dREQ;
		922
		923	req->type = ix;
		924
		925	REQ_SEND;
		926	}
		927
		928	int
		929	aioreq_pri (int pri = 0)
		930	PROTOTYPE: ;$
		931	CODE:
		932	RETVAL = next_pri - EIO_PRI_BIAS;
		933	if (items > 0)
		934	{
		935	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		936	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		937	next_pri = pri + EIO_PRI_BIAS;
		938	}
		939	OUTPUT:
		940	RETVAL
		941
		942	void
		943	aioreq_nice (int nice = 0)
		944	CODE:
		945	nice = next_pri - nice;
		946	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		947	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		948	next_pri = nice + EIO_PRI_BIAS;
1172		949
1173	void	950	void
1174	flush ()	951	flush ()
1175	PROTOTYPE:	952	PROTOTYPE:
1176	CODE:	953	CODE:
1177	while (nreqs)	954	while (eio_nreqs ())
1178	{	955	{
1179	poll_wait ();	956	poll_wait ();
1180	poll_cb ();	957	poll_cb ();
1181	}	958	}
1182		959
1183	void	960	int
1184	poll()	961	poll()
1185	PROTOTYPE:	962	PROTOTYPE:
1186	CODE:	963	CODE:
1187	if (nreqs)
1188	{
1189	poll_wait ();	964	poll_wait ();
1190	poll_cb ();	965	RETVAL = poll_cb ();
1191	}	966	OUTPUT:
		967	RETVAL
1192		968
1193	int	969	int
1194	poll_fileno()	970	poll_fileno()
1195	PROTOTYPE:	971	PROTOTYPE:
1196	CODE:	972	CODE:
…		…
1208		984
1209	void	985	void
1210	poll_wait()	986	poll_wait()
1211	PROTOTYPE:	987	PROTOTYPE:
1212	CODE:	988	CODE:
1213	if (nreqs)
1214	poll_wait ();	989	poll_wait ();
1215		990
1216	int	991	int
1217	nreqs()	992	nreqs()
1218	PROTOTYPE:	993	PROTOTYPE:
1219	CODE:	994	CODE:
1220	RETVAL = nreqs;	995	RETVAL = eio_nreqs ();
1221	OUTPUT:	996	OUTPUT:
1222	RETVAL	997	RETVAL
1223		998
		999	int
		1000	nready()
		1001	PROTOTYPE:
		1002	CODE:
		1003	RETVAL = eio_nready ();
		1004	OUTPUT:
		1005	RETVAL
		1006
		1007	int
		1008	npending()
		1009	PROTOTYPE:
		1010	CODE:
		1011	RETVAL = eio_npending ();
		1012	OUTPUT:
		1013	RETVAL
		1014
		1015	int
		1016	nthreads()
		1017	PROTOTYPE:
		1018	CODE:
		1019	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		1020	RETVAL = started;
		1021	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		1022	OUTPUT:
		1023	RETVAL
		1024
		1025	void _on_next_submit (SV *cb)
		1026	CODE:
		1027	SvREFCNT_dec (on_next_submit);
		1028	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1029
1224	PROTOTYPES: DISABLE	1030	PROTOTYPES: DISABLE
1225		1031
1226	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1032	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1227		1033
1228	void	1034	void
1229	cancel (aio_req_ornot req)	1035	cancel (aio_req_ornot req)
1230	PROTOTYPE:
1231	CODE:	1036	CODE:
1232	req_cancel (req);	1037	eio_cancel (req);
		1038
		1039	void
		1040	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1041	CODE:
		1042	SvREFCNT_dec (req->callback);
		1043	req->callback = newSVsv (callback);
1233		1044
1234	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1045	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1235		1046
1236	void	1047	void
1237	add (aio_req grp, ...)	1048	add (aio_req grp, ...)
1238	PPCODE:	1049	PPCODE:
1239	{	1050	{
1240	int i;	1051	int i;
1241		1052
		1053	if (grp->int1 == 2)
		1054	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1055
1242	for (i = 1; i < items; ++i )	1056	for (i = 1; i < items; ++i )
1243	{	1057	{
		1058	aio_req req;
		1059
1244	if (GIMME_V != G_VOID)	1060	if (GIMME_V != G_VOID)
1245	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1061	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1246		1062
1247	aio_req req = SvAIO_REQ (ST (i));	1063	req = SvAIO_REQ (ST (i));
1248		1064
1249	if (req)	1065	if (req)
1250	{	1066	eio_grp_add (grp, req);
1251	req->grp_prev = grp;
1252	req->grp_next = grp->grp_next;
1253	grp->grp_next->grp_prev = req;
1254	grp->grp_next = req;
1255
1256	req->grp = grp;
1257	}	1067	}
1258	}
1259	}	1068	}
		1069
		1070	void
		1071	cancel_subs (aio_req_ornot req)
		1072	CODE:
		1073	req_cancel_subs (req);
1260		1074
1261	void	1075	void
1262	result (aio_req grp, ...)	1076	result (aio_req grp, ...)
1263	CODE:	1077	CODE:
1264	{	1078	{
1265	int i;	1079	int i;
1266	AV *av = newAV ();	1080	AV *av;
1267		1081
1268	if (grp->data)	1082	grp->errorno = errno;
1269	SvREFCNT_dec (grp->data);
1270		1083
		1084	av = newAV ();
		1085
1271	for (i = 1; i < items; ++i )	1086	for (i = 1; i < items; ++i )
1272	av_push (av, newSVsv (ST (i)));	1087	av_push (av, newSVsv (ST (i)));
1273		1088
		1089	SvREFCNT_dec (grp->sv1);
1274	grp->data = (SV *)av;	1090	grp->sv1 = (SV *)av;
1275	}	1091	}
1276		1092
		1093	void
		1094	errno (aio_req grp, int errorno = errno)
		1095	CODE:
		1096	grp->errorno = errorno;
		1097
		1098	void
		1099	limit (aio_req grp, int limit)
		1100	CODE:
		1101	eio_grp_limit (grp, limit);
		1102
		1103	void
		1104	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1105	CODE:
		1106	{
		1107	SvREFCNT_dec (grp->sv2);
		1108	grp->sv2 = newSVsv (callback);
		1109
		1110	if (grp->int2 <= 0)
		1111	grp->int2 = 2;
		1112
		1113	eio_grp_limit (grp, grp->int2);
		1114	}
		1115

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