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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 1.115 by root, Sat May 10 18:06:41 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 unsigned int max_outstanding = 0x7fffffff;
95	static volatile int nreqs;
96	static int max_outstanding = 1<<30;
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	EXTEND (SP, 1);
152
153	switch (req->type)
154	{	179	{
155	case REQ_READDIR:	180	ENTER;
		181	SAVETMPS;
		182	PUSHMARK (SP);
		183	EXTEND (SP, 1);
		184
		185	switch (req->type)
156	{	186	{
157	SV *rv = &PL_sv_undef;	187	case EIO_READDIR:
158
159	if (req->result >= 0)
160	{	188	{
161	char *buf = req->data2ptr;	189	SV *rv = &PL_sv_undef;
162	AV *av = newAV ();
163		190
164	while (req->result)	191	if (req->result >= 0)
165	{	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	{
166	SV *sv = newSVpv (buf, 0);	201	SV *sv = newSVpv (buf, 0);
167		202
168	av_push (av, sv);	203	av_store (av, i, sv);
169	buf += SvCUR (sv) + 1;	204	buf += SvCUR (sv) + 1;
170	req->result--;	205	}
		206
		207	rv = sv_2mortal (newRV_noinc ((SV *)av));
171	}	208	}
172		209
173	rv = sv_2mortal (newRV_noinc ((SV *)av));	210	PUSHs (rv);
174	}	211	}
		212	break;
175		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
176	PUSHs (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;
177	}	295	}
178	break;
179		296
180	case REQ_OPEN:	297	errno = req->errorno;
181	{
182	/* convert fd to fh */
183	SV *fh;
184		298
185	PUSHs (sv_2mortal (newSViv (req->result)));
186	PUTBACK;	299	PUTBACK;
187	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	300	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
188	SPAGAIN;	301	SPAGAIN;
189		302
190	fh = SvREFCNT_inc (POPs);	303	FREETMPS;
		304	LEAVE;
191		305
192	PUSHMARK (SP);	306	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	}	307	}
216		308
217		309	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	}	310	}
232		311
233	static void req_free (aio_req req)	312	static void req_destroy (aio_req req)
234	{	313	{
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)	314	if (req->self)
251	{	315	{
252	sv_unmagic (req->self, PERL_MAGIC_ext);	316	sv_unmagic (req->self, PERL_MAGIC_ext);
253	SvREFCNT_dec (req->self);	317	SvREFCNT_dec (req->self);
254	}	318	}
255		319
256	if (req->data)
257	SvREFCNT_dec (req->data);
258
259	if (req->fh)
260	SvREFCNT_dec (req->fh);	320	SvREFCNT_dec (req->sv1);
261
262	if (req->fh2)
263	SvREFCNT_dec (req->fh2);	321	SvREFCNT_dec (req->sv2);
264
265	if (req->statdata)
266	Safefree (req->statdata);
267
268	if (req->callback)
269	SvREFCNT_dec (req->callback);	322	SvREFCNT_dec (req->callback);
270
271	if (req->type == REQ_READDIR && req->result >= 0)
272	free (req->data2ptr);
273		323
274	Safefree (req);	324	Safefree (req);
275	}	325	}
276		326
277	static void req_cancel (aio_req req)	327	static void req_cancel_subs (aio_req grp)
278	{	328	{
279	req->cancelled = 1;	329	aio_req sub;
280		330
281	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)
282	{	362	{
283	aio_req sub;	363	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		364	croak ("unable to initialize result pipe(2)");
284		365
285	for (sub = req->grp_next; sub != req; sub = sub->grp_next)	366	respipe_close (respipe [0]);
286	req_cancel (sub);	367	respipe [0] = old_readfd;
287	}	368	}
288	}
289		369
290	static int poll_cb ()	370	#ifdef _WIN32
291	{	371	int arg = 1;
292	dSP;	372	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
293	int count = 0;	373	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
294	int do_croak = 0;	374	#else
295	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)");
296		379
297	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 ())
298	{	389	{
299	pthread_mutex_lock (&reslock);	390	int size;
300	req = ress;
301		391
		392	X_LOCK (reslock);
		393	size = res_queue.size;
		394	X_UNLOCK (reslock);
		395
302	if (req)	396	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;	397	return;
321		398
322	nreqs--;	399	maybe_start_thread ();
323		400
324	if (req->type == REQ_QUIT)	401	FD_ZERO (&rfd);
325	started--;	402	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		403
336	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))	404	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	}	405	}
353
354	return count;
355	}	406	}
356		407
357	static void *aio_proc(void *arg);	408	static int poll_cb (void)
358
359	static void start_thread (void)
360	{	409	{
361	sigset_t fullsigset, oldsigset;	410	int res = eio_poll ();
362	pthread_t tid;
363	pthread_attr_t attr;
364		411
365	pthread_attr_init (&attr);	412	if (res > 0)
366	pthread_attr_setstacksize (&attr, STACKSIZE);	413	croak (0);
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	{
391	reqe->next = req;
392	reqe = req;
393	}
394	else
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		414
485	return res;	415	return res;
486	}
487
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)
840	{
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 ();
866
867	atfork_parent ();
868	}	416	}
869		417
870	#define dREQ \	418	#define dREQ \
871	aio_req req; \	419	aio_req req; \
		420	int req_pri = next_pri; \
		421	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
872	\	422	\
873	if (SvOK (callback) && !SvROK (callback)) \	423	if (SvOK (callback) && !SvROK (callback)) \
874	croak ("callback must be undef or of reference type"); \	424	croak ("callback must be undef or of reference type"); \
875	\	425	\
876	Newz (0, req, 1, aio_cb); \	426	Newz (0, req, 1, eio_req); \
877	if (!req) \	427	if (!req) \
878	croak ("out of memory during aio_req allocation"); \	428	croak ("out of memory during eio_req allocation"); \
879	\	429	\
880	req->callback = newSVsv (callback)	430	req->callback = newSVsv (callback); \
		431	req->pri = req_pri
881		432
882	#define REQ_SEND \	433	#define REQ_SEND \
883	req_send (req); \	434	eio_submit (req); \
884	\	435	\
885	if (GIMME_V != G_VOID) \	436	if (GIMME_V != G_VOID) \
886	XPUSHs (req_sv (req, AIO_REQ_KLASS));	437	XPUSHs (req_sv (req, AIO_REQ_KLASS));
887		438
888	MODULE = IO::AIO PACKAGE = IO::AIO	439	MODULE = IO::AIO PACKAGE = IO::AIO
889		440
890	PROTOTYPES: ENABLE	441	PROTOTYPES: ENABLE
891		442
892	BOOT:	443	BOOT:
893	{	444	{
894	HV *stash = gv_stashpv ("IO::AIO", 1);	445	stash = gv_stashpv ("IO::AIO", 1);
		446
895	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	447	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
896	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	448	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
897	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	449	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		450	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		451	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		452	#ifdef _WIN32
		453	X_MUTEX_CHECK (wrklock);
		454	X_MUTEX_CHECK (reslock);
		455	X_MUTEX_CHECK (reqlock);
		456	X_MUTEX_CHECK (reqwait);
		457	X_MUTEX_CHECK (preadwritelock);
		458	X_MUTEX_CHECK (readdirlock);
898		459
899	create_pipe ();	460	X_COND_CHECK (reqwait);
900	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	461	#else
901	}	462	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		463	#endif
902		464
		465	create_respipe ();
		466
		467	if (eio_init (want_poll, done_poll) < 0)
		468	croak ("IO::AIO: unable to initialise eio library");
		469	}
		470
903	void	471	void
904	min_parallel (nthreads)	472	max_poll_reqs (int nreqs)
905	int nthreads
906	PROTOTYPE: $	473	PROTOTYPE: $
		474	CODE:
		475	eio_set_max_poll_reqs (nreqs);
907		476
908	void	477	void
909	max_parallel (nthreads)	478	max_poll_time (double nseconds)
910	int nthreads
911	PROTOTYPE: $	479	PROTOTYPE: $
912
913	int
914	max_outstanding (nreqs)
915	int nreqs
916	PROTOTYPE: $
917	CODE:	480	CODE:
918	RETVAL = max_outstanding;	481	eio_set_max_poll_time (nseconds);
		482
		483	void
		484	min_parallel (int nthreads)
		485	PROTOTYPE: $
		486	CODE:
		487	eio_set_min_parallel (nthreads);
		488
		489	void
		490	max_parallel (int nthreads)
		491	PROTOTYPE: $
		492	CODE:
		493	eio_set_max_parallel (nthreads);
		494
		495	void
		496	max_idle (int nthreads)
		497	PROTOTYPE: $
		498	CODE:
		499	eio_set_max_idle (nthreads);
		500
		501	void
		502	max_outstanding (int maxreqs)
		503	PROTOTYPE: $
		504	CODE:
919	max_outstanding = nreqs;	505	max_outstanding = maxreqs;
920		506
921	void	507	void
922	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	508	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: $$$;$	509	PROTOTYPE: $$$;$
928	PPCODE:	510	PPCODE:
929	{	511	{
930	dREQ;	512	dREQ;
931		513
932	req->type = REQ_OPEN;	514	req->type = EIO_OPEN;
933	req->data = newSVsv (pathname);	515	req->sv1 = newSVsv (pathname);
934	req->dataptr = SvPVbyte_nolen (req->data);	516	req->ptr1 = SvPVbyte_nolen (req->sv1);
935	req->fd = flags;	517	req->int1 = flags;
936	req->mode = mode;	518	req->int2 = mode;
937		519
938	REQ_SEND;	520	REQ_SEND;
939	}	521	}
940		522
941	void	523	void
942	aio_close (fh,callback=&PL_sv_undef)	524	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
943	SV * fh
944	SV * callback
945	PROTOTYPE: $;$	525	PROTOTYPE: $;$
946	ALIAS:	526	ALIAS:
947	aio_close = REQ_CLOSE
948	aio_fsync = REQ_FSYNC	527	aio_fsync = EIO_FSYNC
949	aio_fdatasync = REQ_FDATASYNC	528	aio_fdatasync = EIO_FDATASYNC
950	PPCODE:	529	PPCODE:
951	{	530	{
952	dREQ;	531	dREQ;
953		532
954	req->type = ix;	533	req->type = ix;
955	req->fh = newSVsv (fh);	534	req->sv1 = newSVsv (fh);
956	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	535	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
957		536
958	REQ_SEND (req);	537	REQ_SEND (req);
959	}	538	}
960		539
961	void	540	void
		541	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		542	PROTOTYPE: $;$
		543	PPCODE:
		544	{
		545	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		546	dREQ;
		547
		548	if (close_pipe < 0)
		549	{
		550	int pipefd [2];
		551
		552	if (pipe (pipefd) < 0
		553	|| close (pipefd [1]) < 0
		554	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		555	abort (); /*D*/
		556
		557	close_pipe = pipefd [0];
		558	}
		559
		560	req->type = EIO_DUP2;
		561	req->int1 = close_pipe;
		562	req->sv2 = newSVsv (fh);
		563	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		564
		565	REQ_SEND (req);
		566	}
		567
		568	void
962	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	569	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:	570	ALIAS:
970	aio_read = REQ_READ	571	aio_read = EIO_READ
971	aio_write = REQ_WRITE	572	aio_write = EIO_WRITE
972	PROTOTYPE: $$$$$;$	573	PROTOTYPE: $$$$$;$
973	PPCODE:	574	PPCODE:
974	{	575	{
975	aio_req req;
976	STRLEN svlen;	576	STRLEN svlen;
977	char *svptr = SvPVbyte (data, svlen);	577	char *svptr = SvPVbyte (data, svlen);
		578	UV len = SvUV (length);
978		579
979	SvUPGRADE (data, SVt_PV);	580	SvUPGRADE (data, SVt_PV);
980	SvPOK_on (data);	581	SvPOK_on (data);
981		582
982	if (dataoffset < 0)	583	if (dataoffset < 0)
983	dataoffset += svlen;	584	dataoffset += svlen;
984		585
985	if (dataoffset < 0 || dataoffset > svlen)	586	if (dataoffset < 0 || dataoffset > svlen)
986	croak ("data offset outside of string");	587	croak ("dataoffset outside of data scalar");
987		588
988	if (ix == REQ_WRITE)	589	if (ix == EIO_WRITE)
989	{	590	{
990	/* write: check length and adjust. */	591	/* write: check length and adjust. */
991	if (length < 0 || length + dataoffset > svlen)	592	if (!SvOK (length) || len + dataoffset > svlen)
992	length = svlen - dataoffset;	593	len = svlen - dataoffset;
993	}	594	}
994	else	595	else
995	{	596	{
996	/* read: grow scalar as necessary */	597	/* read: grow scalar as necessary */
997	svptr = SvGROW (data, length + dataoffset);	598	svptr = SvGROW (data, len + dataoffset + 1);
998	}	599	}
999		600
1000	if (length < 0)	601	if (len < 0)
1001	croak ("length must not be negative");	602	croak ("length must not be negative");
1002		603
1003	{	604	{
1004	dREQ;	605	dREQ;
1005		606
1006	req->type = ix;	607	req->type = ix;
1007	req->fh = newSVsv (fh);	608	req->sv1 = newSVsv (fh);
1008	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	609	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1009	: IoOFP (sv_2io (fh)));	610	: IoOFP (sv_2io (fh)));
		611	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1010	req->offset = offset;	612	req->size = len;
1011	req->length = length;
1012	req->data = SvREFCNT_inc (data);	613	req->sv2 = SvREFCNT_inc (data);
1013	req->dataptr = (char *)svptr + dataoffset;	614	req->ptr2 = (char *)svptr + dataoffset;
		615	req->stroffset = dataoffset;
1014		616
1015	if (!SvREADONLY (data))	617	if (!SvREADONLY (data))
1016	{	618	{
1017	SvREADONLY_on (data);	619	SvREADONLY_on (data);
1018	req->data2ptr = (void *)data;	620	req->flags |= FLAG_SV2_RO_OFF;
1019	}	621	}
1020		622
1021	REQ_SEND;	623	REQ_SEND;
1022	}	624	}
1023	}	625	}
1024		626
1025	void	627	void
		628	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		629	PROTOTYPE: $$;$
		630	PPCODE:
		631	{
		632	SV *data;
		633	dREQ;
		634
		635	data = newSV (NAME_MAX);
		636	SvPOK_on (data);
		637
		638	req->type = EIO_READLINK;
		639	req->sv1 = newSVsv (path);
		640	req->ptr1 = SvPVbyte_nolen (req->sv1);
		641	req->sv2 = data;
		642	req->ptr2 = SvPVbyte_nolen (data);
		643
		644	REQ_SEND;
		645	}
		646
		647	void
1026	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	648	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: $$$$;$	649	PROTOTYPE: $$$$;$
1033	PPCODE:	650	PPCODE:
1034	{	651	{
1035	dREQ;	652	dREQ;
1036		653
1037	req->type = REQ_SENDFILE;	654	req->type = EIO_SENDFILE;
1038	req->fh = newSVsv (out_fh);	655	req->sv1 = newSVsv (out_fh);
1039	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	656	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1040	req->fh2 = newSVsv (in_fh);	657	req->sv2 = newSVsv (in_fh);
1041	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	658	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1042	req->offset = in_offset;	659	req->offs = SvVAL64 (in_offset);
1043	req->length = length;	660	req->size = length;
1044		661
1045	REQ_SEND;	662	REQ_SEND;
1046	}	663	}
1047		664
1048	void	665	void
1049	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	666	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1050	SV * fh
1051	UV offset
1052	IV length
1053	SV * callback
1054	PROTOTYPE: $$$;$	667	PROTOTYPE: $$$;$
1055	PPCODE:	668	PPCODE:
1056	{	669	{
1057	dREQ;	670	dREQ;
1058		671
1059	req->type = REQ_READAHEAD;	672	req->type = EIO_READAHEAD;
1060	req->fh = newSVsv (fh);	673	req->sv1 = newSVsv (fh);
1061	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	674	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1062	req->offset = offset;	675	req->offs = SvVAL64 (offset);
1063	req->length = length;	676	req->size = length;
1064		677
1065	REQ_SEND;	678	REQ_SEND;
1066	}	679	}
1067		680
1068	void	681	void
1069	aio_stat (fh_or_path,callback=&PL_sv_undef)	682	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1070	SV * fh_or_path
1071	SV * callback
1072	ALIAS:	683	ALIAS:
1073	aio_stat = REQ_STAT	684	aio_stat = EIO_STAT
1074	aio_lstat = REQ_LSTAT	685	aio_lstat = EIO_LSTAT
1075	PPCODE:	686	PPCODE:
1076	{	687	{
1077	dREQ;	688	dREQ;
1078		689
1079	New (0, req->statdata, 1, Stat_t);	690	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1080	if (!req->statdata)	691	if (!req->ptr2)
1081	{	692	{
1082	req_free (req);	693	req_destroy (req);
1083	croak ("out of memory during aio_req->statdata allocation");	694	croak ("out of memory during aio_stat statdata allocation");
1084	}	695	}
		696
		697	req->flags |= EIO_FLAG_PTR2_FREE;
		698	req->sv1 = newSVsv (fh_or_path);
1085		699
1086	if (SvPOK (fh_or_path))	700	if (SvPOK (fh_or_path))
1087	{	701	{
1088	req->type = ix;	702	req->type = ix;
1089	req->data = newSVsv (fh_or_path);
1090	req->dataptr = SvPVbyte_nolen (req->data);	703	req->ptr1 = SvPVbyte_nolen (req->sv1);
1091	}	704	}
1092	else	705	else
1093	{	706	{
1094	req->type = REQ_FSTAT;	707	req->type = EIO_FSTAT;
1095	req->fh = newSVsv (fh_or_path);
1096	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	708	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1097	}	709	}
1098		710
1099	REQ_SEND;	711	REQ_SEND;
1100	}	712	}
1101		713
1102	void	714	void
		715	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		716	PPCODE:
		717	{
		718	dREQ;
		719
		720	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		721	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		722	req->sv1 = newSVsv (fh_or_path);
		723
		724	if (SvPOK (fh_or_path))
		725	{
		726	req->type = EIO_UTIME;
		727	req->ptr1 = SvPVbyte_nolen (req->sv1);
		728	}
		729	else
		730	{
		731	req->type = EIO_FUTIME;
		732	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		733	}
		734
		735	REQ_SEND;
		736	}
		737
		738	void
		739	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		740	PPCODE:
		741	{
		742	dREQ;
		743
		744	req->sv1 = newSVsv (fh_or_path);
		745	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		746
		747	if (SvPOK (fh_or_path))
		748	{
		749	req->type = EIO_TRUNCATE;
		750	req->ptr1 = SvPVbyte_nolen (req->sv1);
		751	}
		752	else
		753	{
		754	req->type = EIO_FTRUNCATE;
		755	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		756	}
		757
		758	REQ_SEND;
		759	}
		760
		761	void
		762	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		763	ALIAS:
		764	aio_chmod = EIO_CHMOD
		765	aio_fchmod = EIO_FCHMOD
		766	aio_mkdir = EIO_MKDIR
		767	PPCODE:
		768	{
		769	dREQ;
		770
		771	req->type = ix;
		772	req->int2 = mode;
		773	req->sv1 = newSVsv (fh_or_path);
		774
		775	if (ix == EIO_FCHMOD)
		776	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		777	else
		778	req->ptr1 = SvPVbyte_nolen (req->sv1);
		779
		780	REQ_SEND;
		781	}
		782
		783	void
		784	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		785	PPCODE:
		786	{
		787	dREQ;
		788
		789	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		790	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		791	req->sv1 = newSVsv (fh_or_path);
		792
		793	if (SvPOK (fh_or_path))
		794	{
		795	req->type = EIO_CHOWN;
		796	req->ptr1 = SvPVbyte_nolen (req->sv1);
		797	}
		798	else
		799	{
		800	req->type = EIO_FCHOWN;
		801	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		802	}
		803
		804	REQ_SEND;
		805	}
		806
		807	void
1103	aio_unlink (pathname,callback=&PL_sv_undef)	808	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1104	SV * pathname
1105	SV * callback
1106	ALIAS:	809	ALIAS:
1107	aio_unlink = REQ_UNLINK	810	aio_unlink = EIO_UNLINK
1108	aio_rmdir = REQ_RMDIR	811	aio_rmdir = EIO_RMDIR
1109	aio_readdir = REQ_READDIR	812	aio_readdir = EIO_READDIR
1110	PPCODE:	813	PPCODE:
1111	{	814	{
1112	dREQ;	815	dREQ;
1113		816
1114	req->type = ix;	817	req->type = ix;
1115	req->data = newSVsv (pathname);	818	req->sv1 = newSVsv (pathname);
1116	req->dataptr = SvPVbyte_nolen (req->data);	819	req->ptr1 = SvPVbyte_nolen (req->sv1);
		820
		821	REQ_SEND;
		822	}
		823
		824	void
		825	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		826	ALIAS:
		827	aio_link = EIO_LINK
		828	aio_symlink = EIO_SYMLINK
		829	aio_rename = EIO_RENAME
		830	PPCODE:
		831	{
		832	dREQ;
		833
		834	req->type = ix;
		835	req->sv1 = newSVsv (oldpath);
		836	req->ptr1 = SvPVbyte_nolen (req->sv1);
		837	req->sv2 = newSVsv (newpath);
		838	req->ptr2 = SvPVbyte_nolen (req->sv2);
1117		839
1118	REQ_SEND;	840	REQ_SEND;
1119	}	841	}
1120		842
1121	void	843	void
1122	aio_link (oldpath,newpath,callback=&PL_sv_undef)	844	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:	845	PPCODE:
1131	{	846	{
1132	dREQ;	847	dREQ;
1133		848
1134	req->type = ix;	849	req->type = EIO_MKNOD;
1135	req->fh = newSVsv (oldpath);	850	req->sv1 = newSVsv (pathname);
1136	req->data2ptr = SvPVbyte_nolen (req->fh);	851	req->ptr1 = SvPVbyte_nolen (req->sv1);
1137	req->data = newSVsv (newpath);	852	req->int2 = (mode_t)mode;
1138	req->dataptr = SvPVbyte_nolen (req->data);	853	req->offs = dev;
1139		854
1140	REQ_SEND;	855	REQ_SEND;
1141	}	856	}
1142		857
1143	void	858	void
1144	aio_sleep (delay,callback=&PL_sv_undef)	859	aio_busy (double delay, SV *callback=&PL_sv_undef)
1145	double delay
1146	SV * callback
1147	PPCODE:	860	PPCODE:
1148	{	861	{
1149	dREQ;	862	dREQ;
1150		863
1151	req->type = REQ_SLEEP;	864	req->type = EIO_BUSY;
1152	req->fd = delay < 0. ? 0 : delay;	865	req->nv1 = delay < 0. ? 0. : delay;
1153	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1154		866
1155	REQ_SEND;	867	REQ_SEND;
1156	}	868	}
1157		869
1158	void	870	void
1159	aio_group (callback=&PL_sv_undef)	871	aio_group (SV *callback=&PL_sv_undef)
1160	SV * callback
1161	PROTOTYPE: ;$	872	PROTOTYPE: ;$
1162	PPCODE:	873	PPCODE:
1163	{	874	{
1164	dREQ;	875	dREQ;
		876
1165	req->type = REQ_GROUP;	877	req->type = EIO_GROUP;
1166	req->grp_next = req;
1167	req->grp_prev = req;
1168		878
1169	req_send (req);	879	eio_submit (req);
1170	XPUSHs (req_sv (req, AIO_GRP_KLASS));	880	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1171	}	881	}
		882
		883	void
		884	aio_nop (SV *callback=&PL_sv_undef)
		885	ALIAS:
		886	aio_nop = EIO_NOP
		887	aio_sync = EIO_SYNC
		888	PPCODE:
		889	{
		890	dREQ;
		891
		892	req->type = ix;
		893
		894	REQ_SEND;
		895	}
		896
		897	int
		898	aioreq_pri (int pri = 0)
		899	PROTOTYPE: ;$
		900	CODE:
		901	RETVAL = next_pri - EIO_PRI_BIAS;
		902	if (items > 0)
		903	{
		904	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		905	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		906	next_pri = pri + EIO_PRI_BIAS;
		907	}
		908	OUTPUT:
		909	RETVAL
		910
		911	void
		912	aioreq_nice (int nice = 0)
		913	CODE:
		914	nice = next_pri - nice;
		915	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		916	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		917	next_pri = nice + EIO_PRI_BIAS;
1172		918
1173	void	919	void
1174	flush ()	920	flush ()
1175	PROTOTYPE:	921	PROTOTYPE:
1176	CODE:	922	CODE:
…		…
1178	{	924	{
1179	poll_wait ();	925	poll_wait ();
1180	poll_cb ();	926	poll_cb ();
1181	}	927	}
1182		928
1183	void	929	int
1184	poll()	930	poll()
1185	PROTOTYPE:	931	PROTOTYPE:
1186	CODE:	932	CODE:
1187	if (nreqs)
1188	{
1189	poll_wait ();	933	poll_wait ();
1190	poll_cb ();	934	RETVAL = poll_cb ();
1191	}	935	OUTPUT:
		936	RETVAL
1192		937
1193	int	938	int
1194	poll_fileno()	939	poll_fileno()
1195	PROTOTYPE:	940	PROTOTYPE:
1196	CODE:	941	CODE:
…		…
1208		953
1209	void	954	void
1210	poll_wait()	955	poll_wait()
1211	PROTOTYPE:	956	PROTOTYPE:
1212	CODE:	957	CODE:
1213	if (nreqs)
1214	poll_wait ();	958	poll_wait ();
1215		959
1216	int	960	int
1217	nreqs()	961	nreqs()
1218	PROTOTYPE:	962	PROTOTYPE:
1219	CODE:	963	CODE:
1220	RETVAL = nreqs;	964	RETVAL = eio_nreqs ();
1221	OUTPUT:	965	OUTPUT:
1222	RETVAL	966	RETVAL
1223		967
		968	int
		969	nready()
		970	PROTOTYPE:
		971	CODE:
		972	RETVAL = eio_nready ();
		973	OUTPUT:
		974	RETVAL
		975
		976	int
		977	npending()
		978	PROTOTYPE:
		979	CODE:
		980	RETVAL = eio_npending ();
		981	OUTPUT:
		982	RETVAL
		983
		984	int
		985	nthreads()
		986	PROTOTYPE:
		987	CODE:
		988	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		989	RETVAL = started;
		990	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		991	OUTPUT:
		992	RETVAL
		993
1224	PROTOTYPES: DISABLE	994	PROTOTYPES: DISABLE
1225		995
1226	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	996	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1227		997
1228	void	998	void
1229	cancel (aio_req_ornot req)	999	cancel (aio_req_ornot req)
1230	PROTOTYPE:
1231	CODE:	1000	CODE:
1232	req_cancel (req);	1001	eio_cancel (req);
		1002
		1003	void
		1004	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1005	CODE:
		1006	SvREFCNT_dec (req->callback);
		1007	req->callback = newSVsv (callback);
1233		1008
1234	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1009	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1235		1010
1236	void	1011	void
1237	add (aio_req grp, ...)	1012	add (aio_req grp, ...)
1238	PPCODE:	1013	PPCODE:
1239	{	1014	{
1240	int i;	1015	int i;
1241		1016
		1017	if (grp->int1 == 2)
		1018	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1019
1242	for (i = 1; i < items; ++i )	1020	for (i = 1; i < items; ++i )
1243	{	1021	{
		1022	aio_req req;
		1023
1244	if (GIMME_V != G_VOID)	1024	if (GIMME_V != G_VOID)
1245	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1025	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1246		1026
1247	aio_req req = SvAIO_REQ (ST (i));	1027	req = SvAIO_REQ (ST (i));
1248		1028
1249	if (req)	1029	if (req)
1250	{	1030	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	}	1031	}
1258	}
1259	}	1032	}
		1033
		1034	void
		1035	cancel_subs (aio_req_ornot req)
		1036	CODE:
		1037	req_cancel_subs (req);
1260		1038
1261	void	1039	void
1262	result (aio_req grp, ...)	1040	result (aio_req grp, ...)
1263	CODE:	1041	CODE:
1264	{	1042	{
1265	int i;	1043	int i;
1266	AV *av = newAV ();	1044	AV *av;
1267		1045
1268	if (grp->data)	1046	grp->errorno = errno;
1269	SvREFCNT_dec (grp->data);
1270		1047
		1048	av = newAV ();
		1049
1271	for (i = 1; i < items; ++i )	1050	for (i = 1; i < items; ++i )
1272	av_push (av, newSVsv (ST (i)));	1051	av_push (av, newSVsv (ST (i)));
1273		1052
		1053	SvREFCNT_dec (grp->sv1);
1274	grp->data = (SV *)av;	1054	grp->sv1 = (SV *)av;
1275	}	1055	}
1276		1056
		1057	void
		1058	errno (aio_req grp, int errorno = errno)
		1059	CODE:
		1060	grp->errorno = errorno;
		1061
		1062	void
		1063	limit (aio_req grp, int limit)
		1064	CODE:
		1065	eio_grp_limit (grp, limit);
		1066
		1067	void
		1068	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1069	CODE:
		1070	{
		1071	SvREFCNT_dec (grp->sv2);
		1072	grp->sv2 = newSVsv (callback);
		1073
		1074	if (grp->int2 <= 0)
		1075	grp->int2 = 2;
		1076
		1077	eio_grp_limit (grp, grp->int2);
		1078	}
		1079

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