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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.46 by root, Sun Oct 22 00:49:29 2006 UTC vs.
Revision 1.116 by root, Sat May 10 19:25:33 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;
95	static volatile int nreqs;
96	static int max_outstanding = 1<<30;	106	static int max_outstanding = 0;
97	static int respipe [2];
98		107
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	108	static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		109
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	110	static int respipe_osf [2], respipe [2] = { -1, -1 };
104	static volatile aio_req ress, rese; /* queue start, queue end */
105		111
		112	static void req_destroy (aio_req req);
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
139	static void req_invoke (aio_req req)	171	static int req_invoke (eio_req *req)
140	{	172	{
141	dSP;	173	dSP;
142	int errorno = errno;
143		174
144	if (req->cancelled || !SvOK (req->callback))	175	if (req->flags & FLAG_SV2_RO_OFF)
145	return;	176	SvREADONLY_off (req->sv2);
146		177
147	errno = req->errorno;	178	if (!EIO_CANCELLED (req) && SvOK (req->callback))
148
149	ENTER;
150	PUSHMARK (SP);
151
152	switch (req->type)
153	{	179	{
154	case REQ_READDIR:	180	ENTER;
		181	SAVETMPS;
		182	PUSHMARK (SP);
		183	EXTEND (SP, 1);
		184
		185	switch (req->type)
155	{	186	{
156	SV *rv = &PL_sv_undef;	187	case EIO_READDIR:
157
158	if (req->result >= 0)
159	{	188	{
160	char *buf = req->data2ptr;	189	SV *rv = &PL_sv_undef;
161	AV *av = newAV ();
162		190
163	while (req->result)	191	if (req->result >= 0)
164	{	192	{
		193	int i;
		194	char *buf = req->ptr2;
		195	AV *av = newAV ();
		196
		197	av_extend (av, req->result - 1);
		198
		199	for (i = 0; i < req->result; ++i)
		200	{
165	SV *sv = newSVpv (buf, 0);	201	SV *sv = newSVpv (buf, 0);
166		202
167	av_push (av, sv);	203	av_store (av, i, sv);
168	buf += SvCUR (sv) + 1;	204	buf += SvCUR (sv) + 1;
169	req->result--;	205	}
		206
		207	rv = sv_2mortal (newRV_noinc ((SV *)av));
170	}	208	}
171		209
172	rv = sv_2mortal (newRV_noinc ((SV *)av));	210	PUSHs (rv);
173	}	211	}
		212	break;
174		213
		214	case EIO_OPEN:
		215	{
		216	/* convert fd to fh */
		217	SV *fh = &PL_sv_undef;
		218
		219	if (req->result >= 0)
		220	{
		221	GV *gv = (GV *)sv_newmortal ();
		222	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		223	char sym [64];
		224	int symlen;
		225
		226	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		227	gv_init (gv, stash, sym, symlen, 0);
		228
		229	symlen = snprintf (
		230	sym,
		231	sizeof (sym),
		232	"%s&=%d",
		233	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		234	req->result
		235	);
		236
		237	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		238	fh = (SV *)gv;
		239	}
		240
175	XPUSHs (rv);	241	PUSHs (fh);
		242	}
		243	break;
		244
		245	case EIO_GROUP:
		246	req->int1 = 2; /* mark group as finished */
		247
		248	if (req->sv1)
		249	{
		250	int i;
		251	AV *av = (AV *)req->sv1;
		252
		253	EXTEND (SP, AvFILL (av) + 1);
		254	for (i = 0; i <= AvFILL (av); ++i)
		255	PUSHs (*av_fetch (av, i, 0));
		256	}
		257	break;
		258
		259	case EIO_NOP:
		260	case EIO_BUSY:
		261	break;
		262
		263	case EIO_READLINK:
		264	if (req->result > 0)
		265	{
		266	SvCUR_set (req->sv2, req->result);
		267	*SvEND (req->sv2) = 0;
		268	PUSHs (req->sv2);
		269	}
		270	break;
		271
		272	case EIO_STAT:
		273	case EIO_LSTAT:
		274	case EIO_FSTAT:
		275	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		276	PL_laststatval = req->result;
		277	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		278	PUSHs (sv_2mortal (newSViv (req->result)));
		279	break;
		280
		281	case EIO_READ:
		282	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		283	*SvEND (req->sv2) = 0;
		284	PUSHs (sv_2mortal (newSViv (req->result)));
		285	break;
		286
		287	case EIO_DUP2:
		288	if (req->result > 0)
		289	req->result = 0;
		290	/* FALLTHROUGH */
		291
		292	default:
		293	PUSHs (sv_2mortal (newSViv (req->result)));
		294	break;
176	}	295	}
177	break;
178		296
179	case REQ_OPEN:	297	errno = req->errorno;
180	{
181	/* convert fd to fh */
182	SV *fh;
183		298
184	XPUSHs (sv_2mortal (newSViv (req->result)));
185	PUTBACK;	299	PUTBACK;
186	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	300	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
187	SPAGAIN;	301	SPAGAIN;
188		302
189	fh = SvREFCNT_inc (POPs);	303	FREETMPS;
		304	LEAVE;
190		305
191	PUSHMARK (SP);	306	PUTBACK;
192	XPUSHs (sv_2mortal (fh));
193	}
194	break;
195
196	case REQ_SLEEP:
197	case REQ_GROUP:
198	break;
199
200	default:
201	XPUSHs (sv_2mortal (newSViv (req->result)));
202	break;
203	}	307	}
204		308
205		309	return !!SvTRUE (ERRSV);
206	PUTBACK;
207	call_sv (req->callback, G_VOID | G_EVAL);
208	SPAGAIN;
209
210	if (SvTRUE (ERRSV))
211	{
212	req_free (req);
213	croak (0);
214	}
215
216	LEAVE;
217
218	errno = errorno;
219	}	310	}
220		311
221	static void req_free (aio_req req)	312	static void req_destroy (aio_req req)
222	{	313	{
223	if (req->grp)
224	{
225	aio_req grp = req->grp;
226
227	/* unlink request */
228	req->grp_next->grp_prev = req->grp_prev;
229	req->grp_prev->grp_next = req->grp_next;
230
231	if (grp->grp_next == grp && grp->fd)
232	{
233	req_invoke (grp);
234	req_free (grp);
235	}
236	}
237
238	if (req->self)	314	if (req->self)
239	{	315	{
240	sv_unmagic (req->self, PERL_MAGIC_ext);	316	sv_unmagic (req->self, PERL_MAGIC_ext);
241	SvREFCNT_dec (req->self);	317	SvREFCNT_dec (req->self);
242	}	318	}
243		319
244	if (req->data)
245	SvREFCNT_dec (req->data);
246
247	if (req->fh)
248	SvREFCNT_dec (req->fh);	320	SvREFCNT_dec (req->sv1);
249
250	if (req->fh2)
251	SvREFCNT_dec (req->fh2);	321	SvREFCNT_dec (req->sv2);
252
253	if (req->statdata)
254	Safefree (req->statdata);
255
256	if (req->callback)
257	SvREFCNT_dec (req->callback);	322	SvREFCNT_dec (req->callback);
258
259	if (req->type == REQ_READDIR && req->result >= 0)
260	free (req->data2ptr);
261		323
262	Safefree (req);	324	Safefree (req);
263	}	325	}
264		326
265	static void req_cancel (aio_req req)	327	static void req_cancel_subs (aio_req grp)
266	{	328	{
267	req->cancelled = 1;	329	aio_req sub;
268		330
269	if (req->type == REQ_GROUP)	331	if (grp->type != EIO_GROUP)
		332	return;
		333
		334	SvREFCNT_dec (grp->sv2);
		335	grp->sv2 = 0;
		336
		337	eio_grp_cancel (grp);
		338	}
		339
		340	#ifdef USE_SOCKETS_AS_HANDLES
		341	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		342	#else
		343	# define TO_SOCKET(x) (x)
		344	#endif
		345
		346	static void
		347	create_respipe (void)
		348	{
		349	int old_readfd = respipe [0];
		350
		351	if (respipe [1] >= 0)
		352	respipe_close (TO_SOCKET (respipe [1]));
		353
		354	#ifdef _WIN32
		355	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		356	#else
		357	if (pipe (respipe))
		358	#endif
		359	croak ("unable to initialize result pipe");
		360
		361	if (old_readfd >= 0)
270	{	362	{
271	aio_req sub;	363	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		364	croak ("unable to initialize result pipe(2)");
272		365
273	for (sub = req->grp_next; sub != req; sub = sub->grp_next)	366	respipe_close (respipe [0]);
274	req_cancel (sub);	367	respipe [0] = old_readfd;
275	}	368	}
276	}
277		369
278	static int poll_cb ()	370	#ifdef _WIN32
279	{	371	int arg = 1;
280	dSP;	372	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
281	int count = 0;	373	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
282	int do_croak = 0;	374	#else
283	aio_req req;	375	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		376	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		377	#endif
		378	croak ("unable to initialize result pipe(3)");
284		379
285	for (;;)	380	respipe_osf [0] = TO_SOCKET (respipe [0]);
		381	respipe_osf [1] = TO_SOCKET (respipe [1]);
		382	}
		383
		384	static void poll_wait (void)
		385	{
		386	fd_set rfd;
		387
		388	while (eio_nreqs ())
286	{	389	{
287	pthread_mutex_lock (&reslock);	390	int size;
288	req = ress;
289		391
		392	X_LOCK (reslock);
		393	size = res_queue.size;
		394	X_UNLOCK (reslock);
		395
290	if (req)	396	if (size)
291	{
292	ress = req->next;
293
294	if (!ress)
295	{
296	/* read any signals sent by the worker threads */
297	char buf [32];
298	while (read (respipe [0], buf, 32) == 32)
299	;
300
301	rese = 0;
302	}
303	}
304
305	pthread_mutex_unlock (&reslock);
306
307	if (!req)
308	break;	397	return;
309		398
310	nreqs--;	399	maybe_start_thread ();
311		400
312	if (req->type == REQ_QUIT)	401	FD_ZERO (&rfd);
313	started--;	402	FD_SET (respipe [0], &rfd);
314	else if (req->type == REQ_GROUP && req->grp_next != req)
315	{
316	req->fd = 1; /* mark request as delayed */
317	continue;
318	}
319	else
320	{
321	if (req->type == REQ_READ)
322	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
323		403
324	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))	404	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
325	SvREADONLY_off (req->data);
326
327	if (req->statdata)
328	{
329	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
330	PL_laststatval = req->result;
331	PL_statcache = *(req->statdata);
332	}
333
334	req_invoke (req);
335
336	count++;
337	}
338
339	req_free (req);
340	}	405	}
341
342	return count;
343	}	406	}
344		407
345	static void *aio_proc(void *arg);	408	static int poll_cb (void)
346
347	static void start_thread (void)
348	{	409	{
349	sigset_t fullsigset, oldsigset;	410	int res;
350	pthread_t tid;
351	pthread_attr_t attr;
352		411
353	pthread_attr_init (&attr);	412	do
354	pthread_attr_setstacksize (&attr, STACKSIZE);
355	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
356
357	sigfillset (&fullsigset);
358	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
359
360	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
361	started++;
362
363	sigprocmask (SIG_SETMASK, &oldsigset, 0);
364	}
365
366	static void req_send (aio_req req)
367	{
368	while (started < wanted && nreqs >= started)
369	start_thread ();
370
371	nreqs++;
372
373	pthread_mutex_lock (&reqlock);
374
375	req->next = 0;
376
377	if (reqe)
378	{	413	{
379	reqe->next = req;	414	res = eio_poll ();
380	reqe = req;	415
		416	if (res > 0)
		417	croak (0);
381	}	418	}
382	else	419	while (max_outstanding && max_outstanding <= eio_nreqs ());
383	reqe = reqs = req;
384
385	pthread_cond_signal (&reqwait);
386	pthread_mutex_unlock (&reqlock);
387
388	if (nreqs > max_outstanding)
389	for (;;)
390	{
391	poll_cb ();
392
393	if (nreqs <= max_outstanding)
394	break;
395
396	poll_wait ();
397	}
398	}
399
400	static void end_thread (void)
401	{
402	aio_req req;
403	Newz (0, req, 1, aio_cb);
404	req->type = REQ_QUIT;
405
406	req_send (req);
407	}
408
409	static void min_parallel (int nthreads)
410	{
411	if (wanted < nthreads)
412	wanted = nthreads;
413	}
414
415	static void max_parallel (int nthreads)
416	{
417	int cur = started;
418
419	if (wanted > nthreads)
420	wanted = nthreads;
421
422	while (cur > wanted)
423	{
424	end_thread ();
425	cur--;
426	}
427
428	while (started > wanted)
429	{
430	poll_wait ();
431	poll_cb ();
432	}
433	}
434
435	static void create_pipe ()
436	{
437	if (pipe (respipe))
438	croak ("unable to initialize result pipe");
439
440	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
441	croak ("cannot set result pipe to nonblocking mode");
442
443	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
444	croak ("cannot set result pipe to nonblocking mode");
445	}
446
447	/*****************************************************************************/
448	/* work around various missing functions */
449
450	#if !HAVE_PREADWRITE
451	# define pread aio_pread
452	# define pwrite aio_pwrite
453
454	/*
455	* make our pread/pwrite safe against themselves, but not against
456	* normal read/write by using a mutex. slows down execution a lot,
457	* but that's your problem, not mine.
458	*/
459	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
460
461	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
462	{
463	ssize_t res;
464	off_t ooffset;
465
466	pthread_mutex_lock (&preadwritelock);
467	ooffset = lseek (fd, 0, SEEK_CUR);
468	lseek (fd, offset, SEEK_SET);
469	res = read (fd, buf, count);
470	lseek (fd, ooffset, SEEK_SET);
471	pthread_mutex_unlock (&preadwritelock);
472		420
473	return res;	421	return res;
474	}	422	}
475		423
476	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
477	{
478	ssize_t res;
479	off_t ooffset;
480
481	pthread_mutex_lock (&preadwritelock);
482	ooffset = lseek (fd, 0, SEEK_CUR);
483	lseek (fd, offset, SEEK_SET);
484	res = write (fd, buf, count);
485	lseek (fd, offset, SEEK_SET);
486	pthread_mutex_unlock (&preadwritelock);
487
488	return res;
489	}
490	#endif
491
492	#if !HAVE_FDATASYNC
493	# define fdatasync fsync
494	#endif
495
496	#if !HAVE_READAHEAD
497	# define readahead aio_readahead
498
499	static ssize_t readahead (int fd, off_t offset, size_t count)
500	{
501	char readahead_buf[4096];
502
503	while (count > 0)
504	{
505	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
506
507	pread (fd, readahead_buf, len, offset);
508	offset += len;
509	count -= len;
510	}
511
512	errno = 0;
513	}
514	#endif
515
516	#if !HAVE_READDIR_R
517	# define readdir_r aio_readdir_r
518
519	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
520
521	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
522	{
523	struct dirent *e;
524	int errorno;
525
526	pthread_mutex_lock (&readdirlock);
527
528	e = readdir (dirp);
529	errorno = errno;
530
531	if (e)
532	{
533	*res = ent;
534	strcpy (ent->d_name, e->d_name);
535	}
536	else
537	*res = 0;
538
539	pthread_mutex_unlock (&readdirlock);
540
541	errno = errorno;
542	return e ? 0 : -1;
543	}
544	#endif
545
546	/* sendfile always needs emulation */
547	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
548	{
549	ssize_t res;
550
551	if (!count)
552	return 0;
553
554	#if HAVE_SENDFILE
555	# if __linux
556	res = sendfile (ofd, ifd, &offset, count);
557
558	# elif __freebsd
559	/*
560	* Of course, the freebsd sendfile is a dire hack with no thoughts
561	* wasted on making it similar to other I/O functions.
562	*/
563	{
564	off_t sbytes;
565	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
566
567	if (res < 0 && sbytes)
568	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
569	res = sbytes;
570	}
571
572	# elif __hpux
573	res = sendfile (ofd, ifd, offset, count, 0, 0);
574
575	# elif __solaris
576	{
577	struct sendfilevec vec;
578	size_t sbytes;
579
580	vec.sfv_fd = ifd;
581	vec.sfv_flag = 0;
582	vec.sfv_off = offset;
583	vec.sfv_len = count;
584
585	res = sendfilev (ofd, &vec, 1, &sbytes);
586
587	if (res < 0 && sbytes)
588	res = sbytes;
589	}
590
591	# endif
592	#else
593	res = -1;
594	errno = ENOSYS;
595	#endif
596
597	if (res < 0
598	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
599	#if __solaris
600	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
601	#endif
602	)
603	)
604	{
605	/* emulate sendfile. this is a major pain in the ass */
606	char buf[4096];
607	res = 0;
608
609	while (count)
610	{
611	ssize_t cnt;
612
613	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
614
615	if (cnt <= 0)
616	{
617	if (cnt && !res) res = -1;
618	break;
619	}
620
621	cnt = write (ofd, buf, cnt);
622
623	if (cnt <= 0)
624	{
625	if (cnt && !res) res = -1;
626	break;
627	}
628
629	offset += cnt;
630	res += cnt;
631	count -= cnt;
632	}
633	}
634
635	return res;
636	}
637
638	/* read a full directory */
639	static int scandir_ (const char *path, void **namesp)
640	{
641	DIR *dirp = opendir (path);
642	union
643	{
644	struct dirent d;
645	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
646	} u;
647	struct dirent *entp;
648	char *name, *names;
649	int memlen = 4096;
650	int memofs = 0;
651	int res = 0;
652	int errorno;
653
654	if (!dirp)
655	return -1;
656
657	names = malloc (memlen);
658
659	for (;;)
660	{
661	errno = 0, readdir_r (dirp, &u.d, &entp);
662
663	if (!entp)
664	break;
665
666	name = entp->d_name;
667
668	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
669	{
670	int len = strlen (name) + 1;
671
672	res++;
673
674	while (memofs + len > memlen)
675	{
676	memlen *= 2;
677	names = realloc (names, memlen);
678	if (!names)
679	break;
680	}
681
682	memcpy (names + memofs, name, len);
683	memofs += len;
684	}
685	}
686
687	errorno = errno;
688	closedir (dirp);
689
690	if (errorno)
691	{
692	free (names);
693	errno = errorno;
694	res = -1;
695	}
696
697	*namesp = (void *)names;
698	return res;
699	}
700
701	/*****************************************************************************/
702
703	static void *aio_proc (void *thr_arg)
704	{
705	aio_req req;
706	int type;
707
708	do
709	{
710	pthread_mutex_lock (&reqlock);
711
712	for (;;)
713	{
714	req = reqs;
715
716	if (reqs)
717	{
718	reqs = reqs->next;
719	if (!reqs) reqe = 0;
720	}
721
722	if (req)
723	break;
724
725	pthread_cond_wait (&reqwait, &reqlock);
726	}
727
728	pthread_mutex_unlock (&reqlock);
729
730	errno = 0; /* strictly unnecessary */
731
732	if (!req->cancelled)
733	switch (req->type)
734	{
735	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
736	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
737
738	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
739	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
740
741	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
742	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
743	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
744
745	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
746	case REQ_CLOSE: req->result = close (req->fd); break;
747	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
748	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
749	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
750	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
751	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
752
753	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
754	case REQ_FSYNC: req->result = fsync (req->fd); break;
755	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
756
757	case REQ_SLEEP:
758	{
759	struct timeval tv;
760
761	tv.tv_sec = req->fd;
762	tv.tv_usec = req->fd2;
763
764	req->result = select (0, 0, 0, 0, &tv);
765	}
766
767	case REQ_QUIT:
768	break;
769
770	default:
771	req->result = ENOSYS;
772	break;
773	}
774
775	req->errorno = errno;
776
777	pthread_mutex_lock (&reslock);
778
779	req->next = 0;
780
781	if (rese)
782	{
783	rese->next = req;
784	rese = req;
785	}
786	else
787	{
788	rese = ress = req;
789
790	/* write a dummy byte to the pipe so fh becomes ready */
791	write (respipe [1], &respipe, 1);
792	}
793
794	pthread_mutex_unlock (&reslock);
795	}
796	while (type != REQ_QUIT);
797
798	return 0;
799	}
800
801	/*****************************************************************************/
802
803	static void atfork_prepare (void)
804	{
805	pthread_mutex_lock (&reqlock);
806	pthread_mutex_lock (&reslock);
807	#if !HAVE_PREADWRITE
808	pthread_mutex_lock (&preadwritelock);
809	#endif
810	#if !HAVE_READDIR_R
811	pthread_mutex_lock (&readdirlock);
812	#endif
813	}
814
815	static void atfork_parent (void)
816	{
817	#if !HAVE_READDIR_R
818	pthread_mutex_unlock (&readdirlock);
819	#endif
820	#if !HAVE_PREADWRITE
821	pthread_mutex_unlock (&preadwritelock);
822	#endif
823	pthread_mutex_unlock (&reslock);
824	pthread_mutex_unlock (&reqlock);
825	}
826
827	static void atfork_child (void)	424	static void atfork_child (void)
828	{	425	{
829	aio_req prv;
830
831	started = 0;
832
833	while (reqs)
834	{
835	prv = reqs;
836	reqs = prv->next;
837	req_free (prv);
838	}
839
840	reqs = reqe = 0;
841
842	while (ress)
843	{
844	prv = ress;
845	ress = prv->next;
846	req_free (prv);
847	}
848
849	ress = rese = 0;
850
851	close (respipe [0]);
852	close (respipe [1]);
853	create_pipe ();	426	create_respipe ();
854
855	atfork_parent ();
856	}	427	}
857		428
858	#define dREQ \	429	#define dREQ \
859	aio_req req; \	430	aio_req req; \
		431	int req_pri = next_pri; \
		432	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
860	\	433	\
861	if (SvOK (callback) && !SvROK (callback)) \	434	if (SvOK (callback) && !SvROK (callback)) \
862	croak ("callback must be undef or of reference type"); \	435	croak ("callback must be undef or of reference type"); \
863	\	436	\
864	Newz (0, req, 1, aio_cb); \	437	Newz (0, req, 1, eio_req); \
865	if (!req) \	438	if (!req) \
866	croak ("out of memory during aio_req allocation"); \	439	croak ("out of memory during eio_req allocation"); \
867	\	440	\
868	req->callback = newSVsv (callback)	441	req->callback = newSVsv (callback); \
		442	req->pri = req_pri
869		443
870	#define REQ_SEND \	444	#define REQ_SEND \
871	req_send (req); \	445	eio_submit (req); \
872	\	446	\
873	if (GIMME_V != G_VOID) \	447	if (GIMME_V != G_VOID) \
874	XPUSHs (req_sv (req, AIO_REQ_KLASS));	448	XPUSHs (req_sv (req, AIO_REQ_KLASS));
875		449
876	MODULE = IO::AIO PACKAGE = IO::AIO	450	MODULE = IO::AIO PACKAGE = IO::AIO
877		451
878	PROTOTYPES: ENABLE	452	PROTOTYPES: ENABLE
879		453
880	BOOT:	454	BOOT:
881	{	455	{
882	HV *stash = gv_stashpv ("IO::AIO", 1);	456	stash = gv_stashpv ("IO::AIO", 1);
		457
883	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	458	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
884	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	459	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
885	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	460	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		461	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		462	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		463	#ifdef _WIN32
		464	X_MUTEX_CHECK (wrklock);
		465	X_MUTEX_CHECK (reslock);
		466	X_MUTEX_CHECK (reqlock);
		467	X_MUTEX_CHECK (reqwait);
		468	X_MUTEX_CHECK (preadwritelock);
		469	X_MUTEX_CHECK (readdirlock);
886		470
887	create_pipe ();	471	X_COND_CHECK (reqwait);
888	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	472	#else
889	}	473	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		474	#endif
890		475
		476	create_respipe ();
		477
		478	if (eio_init (want_poll, done_poll) < 0)
		479	croak ("IO::AIO: unable to initialise eio library");
		480
		481	/* atfork child called in fifo order, so before eio's handler */
		482	X_THREAD_ATFORK (0, 0, atfork_child);
		483	}
		484
891	void	485	void
892	min_parallel (nthreads)	486	max_poll_reqs (int nreqs)
893	int nthreads
894	PROTOTYPE: $	487	PROTOTYPE: $
		488	CODE:
		489	eio_set_max_poll_reqs (nreqs);
895		490
896	void	491	void
897	max_parallel (nthreads)	492	max_poll_time (double nseconds)
898	int nthreads
899	PROTOTYPE: $	493	PROTOTYPE: $
900
901	int
902	max_outstanding (nreqs)
903	int nreqs
904	PROTOTYPE: $
905	CODE:	494	CODE:
906	RETVAL = max_outstanding;	495	eio_set_max_poll_time (nseconds);
		496
		497	void
		498	min_parallel (int nthreads)
		499	PROTOTYPE: $
		500	CODE:
		501	eio_set_min_parallel (nthreads);
		502
		503	void
		504	max_parallel (int nthreads)
		505	PROTOTYPE: $
		506	CODE:
		507	eio_set_max_parallel (nthreads);
		508
		509	void
		510	max_idle (int nthreads)
		511	PROTOTYPE: $
		512	CODE:
		513	eio_set_max_idle (nthreads);
		514
		515	void
		516	max_outstanding (int maxreqs)
		517	PROTOTYPE: $
		518	CODE:
907	max_outstanding = nreqs;	519	max_outstanding = maxreqs;
908		520
909	void	521	void
910	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	522	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
911	SV * pathname
912	int flags
913	int mode
914	SV * callback
915	PROTOTYPE: $$$;$	523	PROTOTYPE: $$$;$
916	PPCODE:	524	PPCODE:
917	{	525	{
918	dREQ;	526	dREQ;
919		527
920	req->type = REQ_OPEN;	528	req->type = EIO_OPEN;
921	req->data = newSVsv (pathname);	529	req->sv1 = newSVsv (pathname);
922	req->dataptr = SvPVbyte_nolen (req->data);	530	req->ptr1 = SvPVbyte_nolen (req->sv1);
923	req->fd = flags;	531	req->int1 = flags;
924	req->mode = mode;	532	req->int2 = mode;
925		533
926	REQ_SEND;	534	REQ_SEND;
927	}	535	}
928		536
929	void	537	void
930	aio_close (fh,callback=&PL_sv_undef)	538	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
931	SV * fh
932	SV * callback
933	PROTOTYPE: $;$	539	PROTOTYPE: $;$
934	ALIAS:	540	ALIAS:
935	aio_close = REQ_CLOSE
936	aio_fsync = REQ_FSYNC	541	aio_fsync = EIO_FSYNC
937	aio_fdatasync = REQ_FDATASYNC	542	aio_fdatasync = EIO_FDATASYNC
938	PPCODE:	543	PPCODE:
939	{	544	{
940	dREQ;	545	dREQ;
941		546
942	req->type = ix;	547	req->type = ix;
943	req->fh = newSVsv (fh);	548	req->sv1 = newSVsv (fh);
944	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	549	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
945		550
946	REQ_SEND (req);	551	REQ_SEND (req);
947	}	552	}
948		553
949	void	554	void
		555	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		556	PROTOTYPE: $;$
		557	PPCODE:
		558	{
		559	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		560	dREQ;
		561
		562	if (close_pipe < 0)
		563	{
		564	int pipefd [2];
		565
		566	if (pipe (pipefd) < 0
		567	|| close (pipefd [1]) < 0
		568	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		569	abort (); /*D*/
		570
		571	close_pipe = pipefd [0];
		572	}
		573
		574	req->type = EIO_DUP2;
		575	req->int1 = close_pipe;
		576	req->sv2 = newSVsv (fh);
		577	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		578
		579	REQ_SEND (req);
		580	}
		581
		582	void
950	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	583	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
951	SV * fh
952	UV offset
953	UV length
954	SV * data
955	UV dataoffset
956	SV * callback
957	ALIAS:	584	ALIAS:
958	aio_read = REQ_READ	585	aio_read = EIO_READ
959	aio_write = REQ_WRITE	586	aio_write = EIO_WRITE
960	PROTOTYPE: $$$$$;$	587	PROTOTYPE: $$$$$;$
961	PPCODE:	588	PPCODE:
962	{	589	{
963	aio_req req;
964	STRLEN svlen;	590	STRLEN svlen;
965	char *svptr = SvPVbyte (data, svlen);	591	char *svptr = SvPVbyte (data, svlen);
		592	UV len = SvUV (length);
966		593
967	SvUPGRADE (data, SVt_PV);	594	SvUPGRADE (data, SVt_PV);
968	SvPOK_on (data);	595	SvPOK_on (data);
969		596
970	if (dataoffset < 0)	597	if (dataoffset < 0)
971	dataoffset += svlen;	598	dataoffset += svlen;
972		599
973	if (dataoffset < 0 || dataoffset > svlen)	600	if (dataoffset < 0 || dataoffset > svlen)
974	croak ("data offset outside of string");	601	croak ("dataoffset outside of data scalar");
975		602
976	if (ix == REQ_WRITE)	603	if (ix == EIO_WRITE)
977	{	604	{
978	/* write: check length and adjust. */	605	/* write: check length and adjust. */
979	if (length < 0 || length + dataoffset > svlen)	606	if (!SvOK (length) || len + dataoffset > svlen)
980	length = svlen - dataoffset;	607	len = svlen - dataoffset;
981	}	608	}
982	else	609	else
983	{	610	{
984	/* read: grow scalar as necessary */	611	/* read: grow scalar as necessary */
985	svptr = SvGROW (data, length + dataoffset);	612	svptr = SvGROW (data, len + dataoffset + 1);
986	}	613	}
987		614
988	if (length < 0)	615	if (len < 0)
989	croak ("length must not be negative");	616	croak ("length must not be negative");
990		617
991	{	618	{
992	dREQ;	619	dREQ;
993		620
994	req->type = ix;	621	req->type = ix;
995	req->fh = newSVsv (fh);	622	req->sv1 = newSVsv (fh);
996	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	623	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
997	: IoOFP (sv_2io (fh)));	624	: IoOFP (sv_2io (fh)));
		625	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
998	req->offset = offset;	626	req->size = len;
999	req->length = length;
1000	req->data = SvREFCNT_inc (data);	627	req->sv2 = SvREFCNT_inc (data);
1001	req->dataptr = (char *)svptr + dataoffset;	628	req->ptr2 = (char *)svptr + dataoffset;
		629	req->stroffset = dataoffset;
1002		630
1003	if (!SvREADONLY (data))	631	if (!SvREADONLY (data))
1004	{	632	{
1005	SvREADONLY_on (data);	633	SvREADONLY_on (data);
1006	req->data2ptr = (void *)data;	634	req->flags |= FLAG_SV2_RO_OFF;
1007	}	635	}
1008		636
1009	REQ_SEND;	637	REQ_SEND;
1010	}	638	}
1011	}	639	}
1012		640
1013	void	641	void
		642	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		643	PROTOTYPE: $$;$
		644	PPCODE:
		645	{
		646	SV *data;
		647	dREQ;
		648
		649	data = newSV (NAME_MAX);
		650	SvPOK_on (data);
		651
		652	req->type = EIO_READLINK;
		653	req->sv1 = newSVsv (path);
		654	req->ptr1 = SvPVbyte_nolen (req->sv1);
		655	req->sv2 = data;
		656	req->ptr2 = SvPVbyte_nolen (data);
		657
		658	REQ_SEND;
		659	}
		660
		661	void
1014	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	662	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1015	SV * out_fh
1016	SV * in_fh
1017	UV in_offset
1018	UV length
1019	SV * callback
1020	PROTOTYPE: $$$$;$	663	PROTOTYPE: $$$$;$
1021	PPCODE:	664	PPCODE:
1022	{	665	{
1023	dREQ;	666	dREQ;
1024		667
1025	req->type = REQ_SENDFILE;	668	req->type = EIO_SENDFILE;
1026	req->fh = newSVsv (out_fh);	669	req->sv1 = newSVsv (out_fh);
1027	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	670	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1028	req->fh2 = newSVsv (in_fh);	671	req->sv2 = newSVsv (in_fh);
1029	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	672	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1030	req->offset = in_offset;	673	req->offs = SvVAL64 (in_offset);
1031	req->length = length;	674	req->size = length;
1032		675
1033	REQ_SEND;	676	REQ_SEND;
1034	}	677	}
1035		678
1036	void	679	void
1037	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	680	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1038	SV * fh
1039	UV offset
1040	IV length
1041	SV * callback
1042	PROTOTYPE: $$$;$	681	PROTOTYPE: $$$;$
1043	PPCODE:	682	PPCODE:
1044	{	683	{
1045	dREQ;	684	dREQ;
1046		685
1047	req->type = REQ_READAHEAD;	686	req->type = EIO_READAHEAD;
1048	req->fh = newSVsv (fh);	687	req->sv1 = newSVsv (fh);
1049	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	688	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1050	req->offset = offset;	689	req->offs = SvVAL64 (offset);
1051	req->length = length;	690	req->size = length;
1052		691
1053	REQ_SEND;	692	REQ_SEND;
1054	}	693	}
1055		694
1056	void	695	void
1057	aio_stat (fh_or_path,callback=&PL_sv_undef)	696	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1058	SV * fh_or_path
1059	SV * callback
1060	ALIAS:	697	ALIAS:
1061	aio_stat = REQ_STAT	698	aio_stat = EIO_STAT
1062	aio_lstat = REQ_LSTAT	699	aio_lstat = EIO_LSTAT
1063	PPCODE:	700	PPCODE:
1064	{	701	{
1065	dREQ;	702	dREQ;
1066		703
1067	New (0, req->statdata, 1, Stat_t);	704	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1068	if (!req->statdata)	705	if (!req->ptr2)
1069	{	706	{
1070	req_free (req);	707	req_destroy (req);
1071	croak ("out of memory during aio_req->statdata allocation");	708	croak ("out of memory during aio_stat statdata allocation");
1072	}	709	}
		710
		711	req->flags |= EIO_FLAG_PTR2_FREE;
		712	req->sv1 = newSVsv (fh_or_path);
1073		713
1074	if (SvPOK (fh_or_path))	714	if (SvPOK (fh_or_path))
1075	{	715	{
1076	req->type = ix;	716	req->type = ix;
1077	req->data = newSVsv (fh_or_path);
1078	req->dataptr = SvPVbyte_nolen (req->data);	717	req->ptr1 = SvPVbyte_nolen (req->sv1);
1079	}	718	}
1080	else	719	else
1081	{	720	{
1082	req->type = REQ_FSTAT;	721	req->type = EIO_FSTAT;
1083	req->fh = newSVsv (fh_or_path);
1084	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	722	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1085	}	723	}
1086		724
1087	REQ_SEND;	725	REQ_SEND;
1088	}	726	}
1089		727
1090	void	728	void
		729	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		730	PPCODE:
		731	{
		732	dREQ;
		733
		734	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		735	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		736	req->sv1 = newSVsv (fh_or_path);
		737
		738	if (SvPOK (fh_or_path))
		739	{
		740	req->type = EIO_UTIME;
		741	req->ptr1 = SvPVbyte_nolen (req->sv1);
		742	}
		743	else
		744	{
		745	req->type = EIO_FUTIME;
		746	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		747	}
		748
		749	REQ_SEND;
		750	}
		751
		752	void
		753	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		754	PPCODE:
		755	{
		756	dREQ;
		757
		758	req->sv1 = newSVsv (fh_or_path);
		759	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		760
		761	if (SvPOK (fh_or_path))
		762	{
		763	req->type = EIO_TRUNCATE;
		764	req->ptr1 = SvPVbyte_nolen (req->sv1);
		765	}
		766	else
		767	{
		768	req->type = EIO_FTRUNCATE;
		769	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		770	}
		771
		772	REQ_SEND;
		773	}
		774
		775	void
		776	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		777	ALIAS:
		778	aio_chmod = EIO_CHMOD
		779	aio_fchmod = EIO_FCHMOD
		780	aio_mkdir = EIO_MKDIR
		781	PPCODE:
		782	{
		783	dREQ;
		784
		785	req->type = ix;
		786	req->int2 = mode;
		787	req->sv1 = newSVsv (fh_or_path);
		788
		789	if (ix == EIO_FCHMOD)
		790	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		791	else
		792	req->ptr1 = SvPVbyte_nolen (req->sv1);
		793
		794	REQ_SEND;
		795	}
		796
		797	void
		798	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		799	PPCODE:
		800	{
		801	dREQ;
		802
		803	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		804	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		805	req->sv1 = newSVsv (fh_or_path);
		806
		807	if (SvPOK (fh_or_path))
		808	{
		809	req->type = EIO_CHOWN;
		810	req->ptr1 = SvPVbyte_nolen (req->sv1);
		811	}
		812	else
		813	{
		814	req->type = EIO_FCHOWN;
		815	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		816	}
		817
		818	REQ_SEND;
		819	}
		820
		821	void
1091	aio_unlink (pathname,callback=&PL_sv_undef)	822	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1092	SV * pathname
1093	SV * callback
1094	ALIAS:	823	ALIAS:
1095	aio_unlink = REQ_UNLINK	824	aio_unlink = EIO_UNLINK
1096	aio_rmdir = REQ_RMDIR	825	aio_rmdir = EIO_RMDIR
1097	aio_readdir = REQ_READDIR	826	aio_readdir = EIO_READDIR
1098	PPCODE:	827	PPCODE:
1099	{	828	{
1100	dREQ;	829	dREQ;
1101		830
1102	req->type = ix;	831	req->type = ix;
1103	req->data = newSVsv (pathname);	832	req->sv1 = newSVsv (pathname);
1104	req->dataptr = SvPVbyte_nolen (req->data);	833	req->ptr1 = SvPVbyte_nolen (req->sv1);
		834
		835	REQ_SEND;
		836	}
		837
		838	void
		839	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		840	ALIAS:
		841	aio_link = EIO_LINK
		842	aio_symlink = EIO_SYMLINK
		843	aio_rename = EIO_RENAME
		844	PPCODE:
		845	{
		846	dREQ;
		847
		848	req->type = ix;
		849	req->sv1 = newSVsv (oldpath);
		850	req->ptr1 = SvPVbyte_nolen (req->sv1);
		851	req->sv2 = newSVsv (newpath);
		852	req->ptr2 = SvPVbyte_nolen (req->sv2);
1105		853
1106	REQ_SEND;	854	REQ_SEND;
1107	}	855	}
1108		856
1109	void	857	void
1110	aio_link (oldpath,newpath,callback=&PL_sv_undef)	858	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1111	SV * oldpath
1112	SV * newpath
1113	SV * callback
1114	ALIAS:
1115	aio_link = REQ_LINK
1116	aio_symlink = REQ_SYMLINK
1117	aio_rename = REQ_RENAME
1118	PPCODE:	859	PPCODE:
1119	{	860	{
1120	dREQ;	861	dREQ;
1121		862
1122	req->type = ix;	863	req->type = EIO_MKNOD;
1123	req->fh = newSVsv (oldpath);	864	req->sv1 = newSVsv (pathname);
1124	req->data2ptr = SvPVbyte_nolen (req->fh);	865	req->ptr1 = SvPVbyte_nolen (req->sv1);
1125	req->data = newSVsv (newpath);	866	req->int2 = (mode_t)mode;
1126	req->dataptr = SvPVbyte_nolen (req->data);	867	req->offs = dev;
1127		868
1128	REQ_SEND;	869	REQ_SEND;
1129	}	870	}
1130		871
1131	void	872	void
1132	aio_sleep (delay,callback=&PL_sv_undef)	873	aio_busy (double delay, SV *callback=&PL_sv_undef)
1133	double delay
1134	SV * callback
1135	PPCODE:	874	PPCODE:
1136	{	875	{
1137	dREQ;	876	dREQ;
1138		877
1139	req->type = REQ_SLEEP;	878	req->type = EIO_BUSY;
1140	req->fd = delay < 0. ? 0 : delay;	879	req->nv1 = delay < 0. ? 0. : delay;
1141	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1142		880
1143	REQ_SEND;	881	REQ_SEND;
1144	}	882	}
1145		883
1146	void	884	void
1147	aio_group (callback=&PL_sv_undef)	885	aio_group (SV *callback=&PL_sv_undef)
1148	SV * callback
1149	PROTOTYPE: ;$	886	PROTOTYPE: ;$
1150	PPCODE:	887	PPCODE:
1151	{	888	{
1152	dREQ;	889	dREQ;
		890
1153	req->type = REQ_GROUP;	891	req->type = EIO_GROUP;
1154	req->grp_next = req;
1155	req->grp_prev = req;
1156		892
1157	req_send (req);	893	eio_submit (req);
1158	XPUSHs (req_sv (req, AIO_GRP_KLASS));	894	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1159	}	895	}
		896
		897	void
		898	aio_nop (SV *callback=&PL_sv_undef)
		899	ALIAS:
		900	aio_nop = EIO_NOP
		901	aio_sync = EIO_SYNC
		902	PPCODE:
		903	{
		904	dREQ;
		905
		906	req->type = ix;
		907
		908	REQ_SEND;
		909	}
		910
		911	int
		912	aioreq_pri (int pri = 0)
		913	PROTOTYPE: ;$
		914	CODE:
		915	RETVAL = next_pri - EIO_PRI_BIAS;
		916	if (items > 0)
		917	{
		918	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		919	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		920	next_pri = pri + EIO_PRI_BIAS;
		921	}
		922	OUTPUT:
		923	RETVAL
		924
		925	void
		926	aioreq_nice (int nice = 0)
		927	CODE:
		928	nice = next_pri - nice;
		929	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		930	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		931	next_pri = nice + EIO_PRI_BIAS;
1160		932
1161	void	933	void
1162	flush ()	934	flush ()
1163	PROTOTYPE:	935	PROTOTYPE:
1164	CODE:	936	CODE:
1165	while (nreqs)	937	while (eio_nreqs ())
1166	{	938	{
1167	poll_wait ();	939	poll_wait ();
1168	poll_cb ();	940	poll_cb ();
1169	}	941	}
1170		942
1171	void	943	int
1172	poll()	944	poll()
1173	PROTOTYPE:	945	PROTOTYPE:
1174	CODE:	946	CODE:
1175	if (nreqs)
1176	{
1177	poll_wait ();	947	poll_wait ();
1178	poll_cb ();	948	RETVAL = poll_cb ();
1179	}	949	OUTPUT:
		950	RETVAL
1180		951
1181	int	952	int
1182	poll_fileno()	953	poll_fileno()
1183	PROTOTYPE:	954	PROTOTYPE:
1184	CODE:	955	CODE:
…		…
1196		967
1197	void	968	void
1198	poll_wait()	969	poll_wait()
1199	PROTOTYPE:	970	PROTOTYPE:
1200	CODE:	971	CODE:
1201	if (nreqs)
1202	poll_wait ();	972	poll_wait ();
1203		973
1204	int	974	int
1205	nreqs()	975	nreqs()
1206	PROTOTYPE:	976	PROTOTYPE:
1207	CODE:	977	CODE:
1208	RETVAL = nreqs;	978	RETVAL = eio_nreqs ();
1209	OUTPUT:	979	OUTPUT:
1210	RETVAL	980	RETVAL
1211		981
		982	int
		983	nready()
		984	PROTOTYPE:
		985	CODE:
		986	RETVAL = eio_nready ();
		987	OUTPUT:
		988	RETVAL
		989
		990	int
		991	npending()
		992	PROTOTYPE:
		993	CODE:
		994	RETVAL = eio_npending ();
		995	OUTPUT:
		996	RETVAL
		997
		998	int
		999	nthreads()
		1000	PROTOTYPE:
		1001	CODE:
		1002	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		1003	RETVAL = started;
		1004	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		1005	OUTPUT:
		1006	RETVAL
		1007
		1008	PROTOTYPES: DISABLE
		1009
1212	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1010	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1213		1011
1214	void	1012	void
1215	cancel (aio_req_ornot req)	1013	cancel (aio_req_ornot req)
1216	PROTOTYPE:
1217	CODE:	1014	CODE:
1218	req_cancel (req);	1015	eio_cancel (req);
		1016
		1017	void
		1018	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1019	CODE:
		1020	SvREFCNT_dec (req->callback);
		1021	req->callback = newSVsv (callback);
1219		1022
1220	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1023	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1221		1024
1222	void	1025	void
1223	add (aio_req grp, ...)	1026	add (aio_req grp, ...)
1224	PROTOTYPE: $;@
1225	PPCODE:	1027	PPCODE:
1226	{	1028	{
1227	int i;	1029	int i;
1228		1030
		1031	if (grp->int1 == 2)
		1032	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1033
1229	for (i = 1; i < items; ++i )	1034	for (i = 1; i < items; ++i )
1230	{	1035	{
		1036	aio_req req;
		1037
1231	if (GIMME_V != G_VOID)	1038	if (GIMME_V != G_VOID)
1232	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1039	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1233		1040
1234	aio_req req = SvAIO_REQ (ST (i));	1041	req = SvAIO_REQ (ST (i));
1235	printf ("req = %p\n", req);//D
1236		1042
1237	if (req)	1043	if (req)
1238	{	1044	eio_grp_add (grp, req);
1239	req->grp_prev = grp;
1240	req->grp_next = grp->grp_next;
1241	grp->grp_next->grp_prev = req;
1242	grp->grp_next = req;
1243
1244	req->grp = grp;
1245	}	1045	}
1246	}
1247	}	1046	}
1248		1047
		1048	void
		1049	cancel_subs (aio_req_ornot req)
		1050	CODE:
		1051	req_cancel_subs (req);
		1052
		1053	void
		1054	result (aio_req grp, ...)
		1055	CODE:
		1056	{
		1057	int i;
		1058	AV *av;
		1059
		1060	grp->errorno = errno;
		1061
		1062	av = newAV ();
		1063
		1064	for (i = 1; i < items; ++i )
		1065	av_push (av, newSVsv (ST (i)));
		1066
		1067	SvREFCNT_dec (grp->sv1);
		1068	grp->sv1 = (SV *)av;
		1069	}
		1070
		1071	void
		1072	errno (aio_req grp, int errorno = errno)
		1073	CODE:
		1074	grp->errorno = errorno;
		1075
		1076	void
		1077	limit (aio_req grp, int limit)
		1078	CODE:
		1079	eio_grp_limit (grp, limit);
		1080
		1081	void
		1082	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1083	CODE:
		1084	{
		1085	SvREFCNT_dec (grp->sv2);
		1086	grp->sv2 = newSVsv (callback);
		1087
		1088	if (grp->int2 <= 0)
		1089	grp->int2 = 2;
		1090
		1091	eio_grp_limit (grp, grp->int2);
		1092	}
		1093

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