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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 1.153 by root, Wed Jul 15 01:36:04 2009 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	#include "schmorp.h"
9
10	#include <pthread.h>
11		10
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
13	#include <errno.h>	13	#include <errno.h>
14	#include <sys/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	14	#include <sys/types.h>
17	#include <sys/stat.h>	15	#include <sys/stat.h>
18	#include <limits.h>	16	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	17	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	18	#include <sched.h>
23		19
24	#if HAVE_SENDFILE	20	/* perl namespace pollution */
25	# if __linux	21	#undef VERSION
26	# include <sys/sendfile.h>	22
27	# elif __freebsd	23	#ifdef _WIN32
28	# include <sys/socket.h>	24
29	# include <sys/uio.h>	25	# define EIO_STRUCT_DIRENT Direntry_t
30	# elif __hpux	26	# undef malloc
31	# include <sys/socket.h>	27	# undef free
32	# elif __solaris /* not yet */	28
33	# include <sys/sendfile.h>	29	// perl overrides all those nice win32 functions
		30	# undef open
		31	# undef read
		32	# undef write
		33	# undef send
		34	# undef recv
		35	# undef stat
		36	# undef fstat
		37	# define lstat stat
		38	# undef truncate
		39	# undef ftruncate
		40	# undef open
		41	# undef close
		42	# undef unlink
		43	# undef rmdir
		44	# undef rename
		45	# undef lseek
		46
		47	# define chown(a,b,c) (errno = ENOSYS, -1)
		48	# define fchown(a,b,c) (errno = ENOSYS, -1)
		49	# define fchmod(a,b) (errno = ENOSYS, -1)
		50	# define symlink(a,b) (errno = ENOSYS, -1)
		51	# define readlink(a,b,c) (errno = ENOSYS, -1)
		52	# define mknod(a,b,c) (errno = ENOSYS, -1)
		53	# define truncate(a,b) (errno = ENOSYS, -1)
		54	# define ftruncate(fd,o) chsize ((fd), (o))
		55	# define fsync(fd) _commit (fd)
		56	# define opendir(fd) (errno = ENOSYS, 0)
		57	# define readdir(fd) (errno = ENOSYS, -1)
		58	# define closedir(fd) (errno = ENOSYS, -1)
		59	# define mkdir(a,b) mkdir (a)
		60
34	# else	61	#else
35	# error sendfile support requested but not available	62
36	# endif	63	# include <sys/time.h>
		64	# include <sys/select.h>
		65	# include <unistd.h>
		66	# include <utime.h>
		67	# include <signal.h>
		68	# define EIO_STRUCT_DIRENT struct dirent
		69
37	#endif	70	#endif
38		71
39	/* used for struct dirent, AIX doesn't provide it */	72	/* perl stupidly overrides readdir and maybe others */
40	#ifndef NAME_MAX	73	/* with thread-unsafe versions, imagine that :( */
41	# define NAME_MAX 4096	74	#undef readdir
		75	#undef opendir
		76	#undef closedir
		77
		78	#define EIO_STRUCT_STAT Stat_t
		79
		80	/* use NV for 32 bit perls as it allows larger offsets */
		81	#if IVSIZE >= 8
		82	# define VAL64 IV
		83	# define SvVAL64 SvIV
		84	# define newSVval64 newSViv
		85	#else
		86	# define VAL64 NV
		87	# define SvVAL64 SvNV
		88	# define newSVval64 newSVnv
42	#endif	89	#endif
43		90
44	#if __ia64	91	/*****************************************************************************/
45	# define STACKSIZE 65536	92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
46	#else	95	#else
47	# define STACKSIZE 8192	96	# define expect(expr,value) (expr)
48	#endif	97	#endif
49		98
50	enum {	99	#define expect_false(expr) expect ((expr) != 0, 0)
51	REQ_QUIT,	100	#define expect_true(expr) expect ((expr) != 0, 1)
52	REQ_OPEN, REQ_CLOSE,	101
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	102	/*****************************************************************************/
54	REQ_SENDFILE,	103
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	104	static HV *stash;
56	REQ_FSYNC, REQ_FDATASYNC,	105	typedef SV SV8; /* byte-sv, used for argument-checking */
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	106	typedef int aio_rfd; /* read file desriptor */
58	REQ_READDIR,	107	typedef int aio_wfd; /* write file descriptor */
59	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,
61	REQ_GROUP,
62	};
63		108
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	109	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	110	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		111
67	typedef struct aio_cb	112	#define EIO_REQ_MEMBERS \
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;	113	SV *callback; \
76	SV *fh, *fh2;	114	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;	115	STRLEN stroffset; \
87	mode_t mode; /* open */	116	SV *self;
88	unsigned char cancelled;
89	} aio_cb;
90		117
		118	#define EIO_NO_WRAPPERS 1
		119
		120	#include "libeio/eio.h"
		121
		122	#ifndef POSIX_FADV_NORMAL
		123	# define POSIX_FADV_NORMAL 0
		124	# define NO_FADVISE 1
		125	#endif
		126
		127	#ifndef POSIX_FADV_SEQUENTIAL
		128	# define POSIX_FADV_SEQUENTIAL 0
		129	#endif
		130
		131	#ifndef POSIX_FADV_RANDOM
		132	# define POSIX_FADV_RANDOM 0
		133	#endif
		134
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138
		139	#ifndef POSIX_FADV_WILLNEED
		140	# define POSIX_FADV_WILLNEED 0
		141	#endif
		142
		143	#ifndef POSIX_FADV_DONTNEED
		144	# define POSIX_FADV_DONTNEED 0
		145	#endif
		146
		147	static int req_invoke (eio_req *req);
		148	#define EIO_FINISH(req) req_invoke (req)
		149	static void req_destroy (eio_req *grp);
		150	#define EIO_DESTROY(req) req_destroy (req)
		151
		152	enum {
		153	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		154	};
		155
		156	#include "libeio/eio.c"
		157
91	typedef aio_cb *aio_req;	158	typedef eio_req *aio_req;
92	typedef aio_cb *aio_req_ornot;	159	typedef eio_req *aio_req_ornot;
93		160
94	static int started, wanted;	161	static SV *on_next_submit;
95	static volatile int nreqs;	162	static int next_pri = EIO_PRI_DEFAULT;
96	static int max_outstanding = 1<<30;	163	static int max_outstanding;
		164
97	static int respipe [2];	165	static int respipe_osf [2];
		166	static s_epipe respipe;
98		167
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	168	static void req_destroy (aio_req req);
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102
103	static volatile aio_req reqs, reqe; /* queue start, queue end */
104	static volatile aio_req ress, rese; /* queue start, queue end */
105
106	static void req_free (aio_req req);	169	static void req_cancel (aio_req req);
		170
		171	static void want_poll (void)
		172	{
		173	/* write a dummy byte to the pipe so fh becomes ready */
		174	s_epipe_signal (&respipe);
		175	}
		176
		177	static void done_poll (void)
		178	{
		179	/* read any signals sent by the worker threads */
		180	s_epipe_drain (&respipe);
		181	}
107		182
108	/* must be called at most once */	183	/* must be called at most once */
109	static SV *req_sv (aio_req req, const char *klass)	184	static SV *req_sv (aio_req req, const char *klass)
110	{	185	{
		186	if (!req->self)
		187	{
111	req->self = (SV *)newHV ();	188	req->self = (SV *)newHV ();
112	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	189	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		190	}
113		191
114	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	192	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
115	}	193	}
116		194
117	static aio_req SvAIO_REQ (SV *sv)	195	static aio_req SvAIO_REQ (SV *sv)
118	{	196	{
		197	MAGIC *mg;
		198
119	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	199	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
120	croak ("object of class " AIO_REQ_KLASS " expected");	200	croak ("object of class " AIO_REQ_KLASS " expected");
121		201
122	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	202	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
123		203
124	return mg ? (aio_req)mg->mg_ptr : 0;	204	return mg ? (aio_req)mg->mg_ptr : 0;
125	}	205	}
126		206
127	static void poll_wait ()	207	static void aio_grp_feed (aio_req grp)
128	{	208	{
129	if (nreqs && !ress)	209	if (grp->sv2 && SvOK (grp->sv2))
130	{	210	{
131	fd_set rfd;	211	dSP;
132	FD_ZERO(&rfd);
133	FD_SET(respipe [0], &rfd);
134		212
135	select (respipe [0] + 1, &rfd, 0, 0, 0);	213	ENTER;
		214	SAVETMPS;
		215	PUSHMARK (SP);
		216	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		217	PUTBACK;
		218	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		219	SPAGAIN;
		220	FREETMPS;
		221	LEAVE;
136	}	222	}
137	}	223	}
138		224
		225	static void req_submit (eio_req *req)
		226	{
		227	eio_submit (req);
		228
		229	if (expect_false (on_next_submit))
		230	{
		231	dSP;
		232	SV *cb = sv_2mortal (on_next_submit);
		233
		234	on_next_submit = 0;
		235
		236	PUSHMARK (SP);
		237	PUTBACK;
		238	call_sv (cb, G_DISCARD | G_EVAL);
		239	}
		240	}
		241
139	static void req_invoke (aio_req req)	242	static int req_invoke (eio_req *req)
140	{	243	{
141	dSP;	244	dSP;
142	int errorno = errno;
143		245
144	if (req->cancelled || !SvOK (req->callback))	246	if (req->flags & FLAG_SV2_RO_OFF)
145	return;	247	SvREADONLY_off (req->sv2);
146		248
147	errno = req->errorno;	249	if (!EIO_CANCELLED (req) && req->callback)
148
149	ENTER;
150	PUSHMARK (SP);
151	EXTEND (SP, 1);
152
153	switch (req->type)
154	{	250	{
155	case REQ_READDIR:	251	ENTER;
		252	SAVETMPS;
		253	PUSHMARK (SP);
		254	EXTEND (SP, 1);
		255
		256	switch (req->type)
156	{	257	{
157	SV *rv = &PL_sv_undef;	258	case EIO_READDIR:
158
159	if (req->result >= 0)
160	{	259	{
161	char *buf = req->data2ptr;	260	SV *rv = &PL_sv_undef;
162	AV *av = newAV ();
163		261
164	while (req->result)	262	if (req->result >= 0)
165	{	263	{
		264	int i;
		265	char *names = (char *)req->ptr2;
		266	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
166	SV *sv = newSVpv (buf, 0);	267	AV *av = newAV ();
167		268
168	av_push (av, sv);	269	av_extend (av, req->result - 1);
		270
		271	for (i = 0; i < req->result; ++i)
		272	{
		273	if (req->int1 & EIO_READDIR_DENTS)
		274	{
		275	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		276
		277	if (req->int1 & EIO_READDIR_CUSTOM2)
		278	{
		279	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		280	AV *avent = newAV ();
		281
		282	av_extend (avent, 2);
		283
		284	if (!sv_type [ent->type])
		285	{
		286	sv_type [ent->type] = newSViv (ent->type);
		287	SvREADONLY_on (sv_type [ent->type]);
		288	}
		289
		290	av_store (avent, 0, namesv);
		291	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		292	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		293
		294	av_store (av, i, newRV_noinc ((SV *)avent));
		295	}
		296	else
		297	av_store (av, i, namesv);
		298
		299	++ent;
		300	}
		301	else
		302	{
		303	SV *name = newSVpv (names, 0);
		304	av_store (av, i, name);
169	buf += SvCUR (sv) + 1;	305	names += SvCUR (name) + 1;
170	req->result--;	306	}
		307	}
		308
		309	rv = sv_2mortal (newRV_noinc ((SV *)av));
171	}	310	}
172		311
173	rv = sv_2mortal (newRV_noinc ((SV *)av));	312	PUSHs (rv);
		313
		314	if (req->int1 & EIO_READDIR_CUSTOM1)
		315	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
174	}	316	}
		317	break;
175		318
		319	case EIO_OPEN:
		320	{
		321	/* convert fd to fh */
		322	SV *fh = &PL_sv_undef;
		323
		324	if (req->result >= 0)
		325	{
		326	GV *gv = (GV *)sv_newmortal ();
		327	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		328	char sym [64];
		329	int symlen;
		330
		331	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		332	gv_init (gv, stash, sym, symlen, 0);
		333
		334	symlen = snprintf (
		335	sym,
		336	sizeof (sym),
		337	"%s&=%d",
		338	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		339	(int)req->result
		340	);
		341
		342	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		343	fh = (SV *)gv;
		344	}
		345
176	PUSHs (rv);	346	PUSHs (fh);
		347	}
		348	break;
		349
		350	case EIO_GROUP:
		351	req->int1 = 2; /* mark group as finished */
		352
		353	if (req->sv1)
		354	{
		355	int i;
		356	AV *av = (AV *)req->sv1;
		357
		358	EXTEND (SP, AvFILL (av) + 1);
		359	for (i = 0; i <= AvFILL (av); ++i)
		360	PUSHs (*av_fetch (av, i, 0));
		361	}
		362	break;
		363
		364	case EIO_NOP:
		365	case EIO_BUSY:
		366	break;
		367
		368	case EIO_READLINK:
		369	if (req->result > 0)
		370	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		371	break;
		372
		373	case EIO_STAT:
		374	case EIO_LSTAT:
		375	case EIO_FSTAT:
		376	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		377	PL_laststatval = req->result;
		378	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		379	PUSHs (sv_2mortal (newSViv (req->result)));
		380	break;
		381
		382	case EIO_READ:
		383	{
		384	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		385	*SvEND (req->sv2) = 0;
		386	SvPOK_only (req->sv2);
		387	SvSETMAGIC (req->sv2);
		388	PUSHs (sv_2mortal (newSViv (req->result)));
		389	}
		390	break;
		391
		392	case EIO_DUP2:
		393	if (req->result > 0)
		394	req->result = 0;
		395	/* FALLTHROUGH */
		396
		397	default:
		398	PUSHs (sv_2mortal (newSViv (req->result)));
		399	break;
177	}	400	}
178	break;
179		401
180	case REQ_OPEN:	402	errno = req->errorno;
181	{
182	/* convert fd to fh */
183	SV *fh;
184		403
185	PUSHs (sv_2mortal (newSViv (req->result)));
186	PUTBACK;	404	PUTBACK;
187	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	405	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
188	SPAGAIN;	406	SPAGAIN;
189		407
190	fh = SvREFCNT_inc (POPs);	408	FREETMPS;
		409	LEAVE;
191		410
192	PUSHMARK (SP);	411	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	}	412	}
216		413
217		414	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	}	415	}
232		416
233	static void req_free (aio_req req)	417	static void req_destroy (aio_req req)
234	{	418	{
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)	419	if (req->self)
251	{	420	{
252	sv_unmagic (req->self, PERL_MAGIC_ext);	421	sv_unmagic (req->self, PERL_MAGIC_ext);
253	SvREFCNT_dec (req->self);	422	SvREFCNT_dec (req->self);
254	}	423	}
255		424
256	if (req->data)
257	SvREFCNT_dec (req->data);
258
259	if (req->fh)
260	SvREFCNT_dec (req->fh);	425	SvREFCNT_dec (req->sv1);
261
262	if (req->fh2)
263	SvREFCNT_dec (req->fh2);	426	SvREFCNT_dec (req->sv2);
264
265	if (req->statdata)
266	Safefree (req->statdata);
267
268	if (req->callback)
269	SvREFCNT_dec (req->callback);	427	SvREFCNT_dec (req->callback);
270
271	if (req->type == REQ_READDIR && req->result >= 0)
272	free (req->data2ptr);
273		428
274	Safefree (req);	429	Safefree (req);
275	}	430	}
276		431
277	static void req_cancel (aio_req req)	432	static void req_cancel_subs (aio_req grp)
278	{	433	{
279	req->cancelled = 1;	434	aio_req sub;
280		435
281	if (req->type == REQ_GROUP)	436	if (grp->type != EIO_GROUP)
		437	return;
		438
		439	SvREFCNT_dec (grp->sv2);
		440	grp->sv2 = 0;
		441
		442	eio_grp_cancel (grp);
		443	}
		444
		445	static void
		446	create_respipe (void)
		447	{
		448	if (s_epipe_renew (&respipe))
		449	croak ("unable to initialize result pipe");
		450
		451	respipe_osf [0] = S_TO_SOCKET (respipe.fd [0]);
		452	respipe_osf [1] = S_TO_SOCKET (respipe.fd [1]);
		453	}
		454
		455	static void poll_wait (void)
		456	{
		457	while (eio_nreqs ())
282	{	458	{
283	aio_req sub;	459	int size;
284		460
285	for (sub = req->grp_next; sub != req; sub = sub->grp_next)	461	X_LOCK (reslock);
286	req_cancel (sub);	462	size = res_queue.size;
		463	X_UNLOCK (reslock);
		464
		465	if (size)
		466	return;
		467
		468	etp_maybe_start_thread ();
		469
		470	s_epipe_wait (&respipe);
287	}	471	}
288	}	472	}
289		473
290	static int poll_cb ()	474	static int poll_cb (void)
291	{	475	{
292	dSP;
293	int count = 0;
294	int do_croak = 0;
295	aio_req req;
296
297	for (;;)	476	for (;;)
298	{	477	{
299	pthread_mutex_lock (&reslock);	478	int res = eio_poll ();
300	req = ress;
301		479
302	if (req)	480	if (res > 0)
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;	481	croak (0);
321		482
322	nreqs--;	483	if (!max_outstanding || max_outstanding > eio_nreqs ())
		484	return res;
323		485
324	if (req->type == REQ_QUIT)	486	poll_wait ();
325	started--;
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
336	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
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	}	487	}
353
354	return count;
355	}
356
357	static void *aio_proc(void *arg);
358
359	static void start_thread (void)
360	{
361	sigset_t fullsigset, oldsigset;
362	pthread_t tid;
363	pthread_attr_t attr;
364
365	pthread_attr_init (&attr);
366	pthread_attr_setstacksize (&attr, STACKSIZE);
367	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
368
369	sigfillset (&fullsigset);
370	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
371
372	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
373	started++;
374
375	sigprocmask (SIG_SETMASK, &oldsigset, 0);
376	}
377
378	static void req_send (aio_req req)
379	{
380	while (started < wanted && nreqs >= started)
381	start_thread ();
382
383	nreqs++;
384
385	pthread_mutex_lock (&reqlock);
386
387	req->next = 0;
388
389	if (reqe)
390	{
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
485	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	}	488	}
838		489
839	static void atfork_child (void)	490	static void atfork_child (void)
840	{	491	{
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 ();	492	create_respipe ();
		493	}
866		494
867	atfork_parent ();	495	static SV *
		496	get_cb (SV *cb_sv)
		497	{
		498	SvGETMAGIC (cb_sv);
		499	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
868	}	500	}
869		501
870	#define dREQ \	502	#define dREQ \
		503	SV *cb_cv; \
871	aio_req req; \	504	aio_req req; \
		505	int req_pri = next_pri; \
		506	next_pri = EIO_PRI_DEFAULT; \
872	\	507	\
873	if (SvOK (callback) && !SvROK (callback)) \	508	cb_cv = get_cb (callback); \
874	croak ("callback must be undef or of reference type"); \
875	\	509	\
876	Newz (0, req, 1, aio_cb); \	510	Newz (0, req, 1, eio_req); \
877	if (!req) \	511	if (!req) \
878	croak ("out of memory during aio_req allocation"); \	512	croak ("out of memory during eio_req allocation"); \
879	\	513	\
880	req->callback = newSVsv (callback)	514	req->callback = SvREFCNT_inc (cb_cv); \
		515	req->pri = req_pri
881		516
882	#define REQ_SEND \	517	#define REQ_SEND \
		518	PUTBACK; \
883	req_send (req); \	519	req_submit (req); \
		520	SPAGAIN; \
884	\	521	\
885	if (GIMME_V != G_VOID) \	522	if (GIMME_V != G_VOID) \
886	XPUSHs (req_sv (req, AIO_REQ_KLASS));	523	XPUSHs (req_sv (req, AIO_REQ_KLASS));
887		524
888	MODULE = IO::AIO PACKAGE = IO::AIO	525	MODULE = IO::AIO PACKAGE = IO::AIO
889		526
890	PROTOTYPES: ENABLE	527	PROTOTYPES: ENABLE
891		528
892	BOOT:	529	BOOT:
893	{	530	{
		531	static const struct {
		532	const char *name;
		533	IV iv;
		534	} *civ, const_iv[] = {
		535	# define const_iv(name, value) { # name, (IV) value },
		536	# define const_eio(name) { # name, (IV) EIO_ ## name },
		537	const_iv (EXDEV , EXDEV)
		538	const_iv (ENOSYS , ENOSYS)
		539	const_iv (O_RDONLY, O_RDONLY)
		540	const_iv (O_WRONLY, O_WRONLY)
		541	const_iv (O_CREAT , O_CREAT)
		542	const_iv (O_TRUNC , O_TRUNC)
		543	#ifndef _WIN32
		544	const_iv (S_IFIFO , S_IFIFO)
		545	#endif
		546	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		547	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		548	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		549	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		550	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		551	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		552
		553	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		554	const_eio (SYNC_FILE_RANGE_WRITE)
		555	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		556
		557	const_eio (READDIR_DENTS)
		558	const_eio (READDIR_DIRS_FIRST)
		559	const_eio (READDIR_STAT_ORDER)
		560	const_eio (READDIR_FOUND_UNKNOWN)
		561
		562	const_eio (DT_UNKNOWN)
		563	const_eio (DT_FIFO)
		564	const_eio (DT_CHR)
		565	const_eio (DT_DIR)
		566	const_eio (DT_BLK)
		567	const_eio (DT_REG)
		568	const_eio (DT_LNK)
		569	const_eio (DT_SOCK)
		570	const_eio (DT_WHT)
		571	};
		572
894	HV *stash = gv_stashpv ("IO::AIO", 1);	573	stash = gv_stashpv ("IO::AIO", 1);
895	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
896	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
897	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
898		574
		575	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		576	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
		577
899	create_pipe ();	578	create_respipe ();
900	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
901	}
902		579
		580	if (eio_init (want_poll, done_poll) < 0)
		581	croak ("IO::AIO: unable to initialise eio library");
		582
		583	/* atfork child called in fifo order, so before eio's handler */
		584	X_THREAD_ATFORK (0, 0, atfork_child);
		585	}
		586
903	void	587	void
904	min_parallel (nthreads)	588	max_poll_reqs (int nreqs)
905	int nthreads
906	PROTOTYPE: $	589	PROTOTYPE: $
		590	CODE:
		591	eio_set_max_poll_reqs (nreqs);
907		592
908	void	593	void
909	max_parallel (nthreads)	594	max_poll_time (double nseconds)
910	int nthreads
911	PROTOTYPE: $	595	PROTOTYPE: $
912
913	int
914	max_outstanding (nreqs)
915	int nreqs
916	PROTOTYPE: $
917	CODE:	596	CODE:
918	RETVAL = max_outstanding;	597	eio_set_max_poll_time (nseconds);
		598
		599	void
		600	min_parallel (int nthreads)
		601	PROTOTYPE: $
		602	CODE:
		603	eio_set_min_parallel (nthreads);
		604
		605	void
		606	max_parallel (int nthreads)
		607	PROTOTYPE: $
		608	CODE:
		609	eio_set_max_parallel (nthreads);
		610
		611	void
		612	max_idle (int nthreads)
		613	PROTOTYPE: $
		614	CODE:
		615	eio_set_max_idle (nthreads);
		616
		617	void
		618	max_outstanding (int maxreqs)
		619	PROTOTYPE: $
		620	CODE:
919	max_outstanding = nreqs;	621	max_outstanding = maxreqs;
920		622
921	void	623	void
922	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	624	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: $$$;$	625	PROTOTYPE: $$$;$
928	PPCODE:	626	PPCODE:
929	{	627	{
930	dREQ;	628	dREQ;
931		629
932	req->type = REQ_OPEN;	630	req->type = EIO_OPEN;
933	req->data = newSVsv (pathname);	631	req->sv1 = newSVsv (pathname);
934	req->dataptr = SvPVbyte_nolen (req->data);	632	req->ptr1 = SvPVbyte_nolen (req->sv1);
935	req->fd = flags;	633	req->int1 = flags;
936	req->mode = mode;	634	req->int2 = mode;
937		635
938	REQ_SEND;	636	REQ_SEND;
939	}	637	}
940		638
941	void	639	void
942	aio_close (fh,callback=&PL_sv_undef)	640	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
943	SV * fh
944	SV * callback
945	PROTOTYPE: $;$	641	PROTOTYPE: $;$
946	ALIAS:	642	ALIAS:
947	aio_close = REQ_CLOSE
948	aio_fsync = REQ_FSYNC	643	aio_fsync = EIO_FSYNC
949	aio_fdatasync = REQ_FDATASYNC	644	aio_fdatasync = EIO_FDATASYNC
950	PPCODE:	645	PPCODE:
951	{	646	{
		647	int fd = s_fileno_croak (fh, 0);
952	dREQ;	648	dREQ;
953		649
954	req->type = ix;	650	req->type = ix;
955	req->fh = newSVsv (fh);	651	req->sv1 = newSVsv (fh);
956	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	652	req->int1 = fd;
957		653
958	REQ_SEND (req);	654	REQ_SEND (req);
959	}	655	}
960		656
961	void	657	void
		658	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		659	PROTOTYPE: $$$$;$
		660	PPCODE:
		661	{
		662	int fd = s_fileno_croak (fh, 0);
		663	dREQ;
		664
		665	req->type = EIO_SYNC_FILE_RANGE;
		666	req->sv1 = newSVsv (fh);
		667	req->int1 = fd;
		668	req->offs = offset;
		669	req->size = nbytes;
		670	req->int2 = flags;
		671
		672	REQ_SEND (req);
		673	}
		674
		675	void
		676	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		677	PROTOTYPE: $;$
		678	PPCODE:
		679	{
		680	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		681	int fd = s_fileno_croak (fh, 0);
		682	dREQ;
		683
		684	if (close_pipe < 0)
		685	{
		686	int pipefd [2];
		687
		688	if (pipe (pipefd) < 0
		689	|| close (pipefd [1]) < 0
		690	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		691	abort (); /*D*/
		692
		693	close_pipe = pipefd [0];
		694	}
		695
		696	req->type = EIO_DUP2;
		697	req->int1 = close_pipe;
		698	req->sv2 = newSVsv (fh);
		699	req->int2 = fd;
		700
		701	REQ_SEND (req);
		702	}
		703
		704	void
962	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	705	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
963	SV * fh
964	UV offset
965	UV length
966	SV * data
967	UV dataoffset
968	SV * callback
969	ALIAS:	706	ALIAS:
970	aio_read = REQ_READ	707	aio_read = EIO_READ
971	aio_write = REQ_WRITE	708	aio_write = EIO_WRITE
972	PROTOTYPE: $$$$$;$	709	PROTOTYPE: $$$$$;$
973	PPCODE:	710	PPCODE:
974	{	711	{
975	aio_req req;
976	STRLEN svlen;	712	STRLEN svlen;
		713	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
977	char *svptr = SvPVbyte (data, svlen);	714	char *svptr = SvPVbyte (data, svlen);
978		715	UV len = SvUV (length);
979	SvUPGRADE (data, SVt_PV);
980	SvPOK_on (data);
981		716
982	if (dataoffset < 0)	717	if (dataoffset < 0)
983	dataoffset += svlen;	718	dataoffset += svlen;
984		719
985	if (dataoffset < 0 || dataoffset > svlen)	720	if (dataoffset < 0 || dataoffset > svlen)
986	croak ("data offset outside of string");	721	croak ("dataoffset outside of data scalar");
987		722
988	if (ix == REQ_WRITE)	723	if (ix == EIO_WRITE)
989	{	724	{
990	/* write: check length and adjust. */	725	/* write: check length and adjust. */
991	if (length < 0 || length + dataoffset > svlen)	726	if (!SvOK (length) || len + dataoffset > svlen)
992	length = svlen - dataoffset;	727	len = svlen - dataoffset;
993	}	728	}
994	else	729	else
995	{	730	{
996	/* read: grow scalar as necessary */	731	/* read: check type and grow scalar as necessary */
		732	SvUPGRADE (data, SVt_PV);
997	svptr = SvGROW (data, length + dataoffset);	733	svptr = SvGROW (data, len + dataoffset + 1);
998	}	734	}
999
1000	if (length < 0)
1001	croak ("length must not be negative");
1002		735
1003	{	736	{
1004	dREQ;	737	dREQ;
1005		738
1006	req->type = ix;	739	req->type = ix;
1007	req->fh = newSVsv (fh);	740	req->sv1 = newSVsv (fh);
1008	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	741	req->int1 = fd;
1009	: IoOFP (sv_2io (fh)));	742	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1010	req->offset = offset;	743	req->size = len;
1011	req->length = length;
1012	req->data = SvREFCNT_inc (data);	744	req->sv2 = SvREFCNT_inc (data);
1013	req->dataptr = (char *)svptr + dataoffset;	745	req->ptr2 = (char *)svptr + dataoffset;
		746	req->stroffset = dataoffset;
1014		747
1015	if (!SvREADONLY (data))	748	if (!SvREADONLY (data))
1016	{	749	{
1017	SvREADONLY_on (data);	750	SvREADONLY_on (data);
1018	req->data2ptr = (void *)data;	751	req->flags |= FLAG_SV2_RO_OFF;
1019	}	752	}
1020		753
1021	REQ_SEND;	754	REQ_SEND;
1022	}	755	}
1023	}	756	}
1024		757
1025	void	758	void
		759	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		760	PROTOTYPE: $$;$
		761	PPCODE:
		762	{
		763	SV *data;
		764	dREQ;
		765
		766	req->type = EIO_READLINK;
		767	req->sv1 = newSVsv (path);
		768	req->ptr1 = SvPVbyte_nolen (req->sv1);
		769
		770	REQ_SEND;
		771	}
		772
		773	void
1026	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	774	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t 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: $$$$;$	775	PROTOTYPE: $$$$;$
1033	PPCODE:	776	PPCODE:
1034	{	777	{
		778	int ifd = s_fileno_croak (in_fh , 0);
		779	int ofd = s_fileno_croak (out_fh, 1);
1035	dREQ;	780	dREQ;
1036		781
1037	req->type = REQ_SENDFILE;	782	req->type = EIO_SENDFILE;
1038	req->fh = newSVsv (out_fh);	783	req->sv1 = newSVsv (out_fh);
1039	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	784	req->int1 = ofd;
1040	req->fh2 = newSVsv (in_fh);	785	req->sv2 = newSVsv (in_fh);
1041	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	786	req->int2 = ifd;
1042	req->offset = in_offset;	787	req->offs = in_offset;
1043	req->length = length;	788	req->size = length;
1044		789
1045	REQ_SEND;	790	REQ_SEND;
1046	}	791	}
1047		792
1048	void	793	void
1049	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	794	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1050	SV * fh
1051	UV offset
1052	IV length
1053	SV * callback
1054	PROTOTYPE: $$$;$	795	PROTOTYPE: $$$;$
1055	PPCODE:	796	PPCODE:
1056	{	797	{
		798	int fd = s_fileno_croak (fh, 0);
1057	dREQ;	799	dREQ;
1058		800
1059	req->type = REQ_READAHEAD;	801	req->type = EIO_READAHEAD;
1060	req->fh = newSVsv (fh);	802	req->sv1 = newSVsv (fh);
1061	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	803	req->int1 = fd;
1062	req->offset = offset;	804	req->offs = offset;
1063	req->length = length;	805	req->size = length;
1064		806
1065	REQ_SEND;	807	REQ_SEND;
1066	}	808	}
1067		809
1068	void	810	void
1069	aio_stat (fh_or_path,callback=&PL_sv_undef)	811	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1070	SV * fh_or_path
1071	SV * callback
1072	ALIAS:	812	ALIAS:
1073	aio_stat = REQ_STAT	813	aio_stat = EIO_STAT
1074	aio_lstat = REQ_LSTAT	814	aio_lstat = EIO_LSTAT
1075	PPCODE:	815	PPCODE:
1076	{	816	{
1077	dREQ;	817	dREQ;
1078		818
1079	New (0, req->statdata, 1, Stat_t);	819	req->sv1 = newSVsv (fh_or_path);
1080	if (!req->statdata)
1081	{
1082	req_free (req);
1083	croak ("out of memory during aio_req->statdata allocation");
1084	}
1085		820
1086	if (SvPOK (fh_or_path))	821	if (SvPOK (req->sv1))
1087	{	822	{
1088	req->type = ix;	823	req->type = ix;
1089	req->data = newSVsv (fh_or_path);
1090	req->dataptr = SvPVbyte_nolen (req->data);	824	req->ptr1 = SvPVbyte_nolen (req->sv1);
1091	}	825	}
1092	else	826	else
1093	{	827	{
1094	req->type = REQ_FSTAT;	828	req->type = EIO_FSTAT;
1095	req->fh = newSVsv (fh_or_path);
1096	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	829	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1097	}	830	}
1098		831
1099	REQ_SEND;	832	REQ_SEND;
1100	}	833	}
1101		834
1102	void	835	void
		836	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		837	PPCODE:
		838	{
		839	dREQ;
		840
		841	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		842	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		843	req->sv1 = newSVsv (fh_or_path);
		844
		845	if (SvPOK (req->sv1))
		846	{
		847	req->type = EIO_UTIME;
		848	req->ptr1 = SvPVbyte_nolen (req->sv1);
		849	}
		850	else
		851	{
		852	req->type = EIO_FUTIME;
		853	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		854	}
		855
		856	REQ_SEND;
		857	}
		858
		859	void
		860	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		861	PPCODE:
		862	{
		863	dREQ;
		864
		865	req->sv1 = newSVsv (fh_or_path);
		866	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		867
		868	if (SvPOK (req->sv1))
		869	{
		870	req->type = EIO_TRUNCATE;
		871	req->ptr1 = SvPVbyte_nolen (req->sv1);
		872	}
		873	else
		874	{
		875	req->type = EIO_FTRUNCATE;
		876	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		877	}
		878
		879	REQ_SEND;
		880	}
		881
		882	void
		883	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		884	ALIAS:
		885	aio_chmod = EIO_CHMOD
		886	aio_mkdir = EIO_MKDIR
		887	PPCODE:
		888	{
		889	dREQ;
		890
		891	req->int2 = mode;
		892	req->sv1 = newSVsv (fh_or_path);
		893
		894	if (SvPOK (req->sv1))
		895	{
		896	req->type = ix;
		897	req->ptr1 = SvPVbyte_nolen (req->sv1);
		898	}
		899	else
		900	{
		901	req->type = EIO_FCHMOD;
		902	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		903	}
		904
		905	REQ_SEND;
		906	}
		907
		908	void
		909	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		910	PPCODE:
		911	{
		912	dREQ;
		913
		914	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		915	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		916	req->sv1 = newSVsv (fh_or_path);
		917
		918	if (SvPOK (req->sv1))
		919	{
		920	req->type = EIO_CHOWN;
		921	req->ptr1 = SvPVbyte_nolen (req->sv1);
		922	}
		923	else
		924	{
		925	req->type = EIO_FCHOWN;
		926	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		927	}
		928
		929	REQ_SEND;
		930	}
		931
		932	void
		933	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		934	PPCODE:
		935	{
		936	dREQ;
		937
		938	req->type = EIO_READDIR;
		939	req->sv1 = newSVsv (pathname);
		940	req->ptr1 = SvPVbyte_nolen (req->sv1);
		941	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		942
		943	if (flags & EIO_READDIR_DENTS)
		944	req->int1 |= EIO_READDIR_CUSTOM2;
		945
		946	REQ_SEND;
		947	}
		948
		949	void
1103	aio_unlink (pathname,callback=&PL_sv_undef)	950	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1104	SV * pathname
1105	SV * callback
1106	ALIAS:	951	ALIAS:
1107	aio_unlink = REQ_UNLINK	952	aio_unlink = EIO_UNLINK
1108	aio_rmdir = REQ_RMDIR	953	aio_rmdir = EIO_RMDIR
1109	aio_readdir = REQ_READDIR	954	aio_readdir = EIO_READDIR
1110	PPCODE:	955	PPCODE:
1111	{	956	{
1112	dREQ;	957	dREQ;
1113		958
1114	req->type = ix;	959	req->type = ix;
1115	req->data = newSVsv (pathname);	960	req->sv1 = newSVsv (pathname);
1116	req->dataptr = SvPVbyte_nolen (req->data);	961	req->ptr1 = SvPVbyte_nolen (req->sv1);
		962
		963	REQ_SEND;
		964	}
		965
		966	void
		967	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		968	ALIAS:
		969	aio_link = EIO_LINK
		970	aio_symlink = EIO_SYMLINK
		971	aio_rename = EIO_RENAME
		972	PPCODE:
		973	{
		974	dREQ;
		975
		976	req->type = ix;
		977	req->sv1 = newSVsv (oldpath);
		978	req->ptr1 = SvPVbyte_nolen (req->sv1);
		979	req->sv2 = newSVsv (newpath);
		980	req->ptr2 = SvPVbyte_nolen (req->sv2);
1117		981
1118	REQ_SEND;	982	REQ_SEND;
1119	}	983	}
1120		984
1121	void	985	void
1122	aio_link (oldpath,newpath,callback=&PL_sv_undef)	986	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:	987	PPCODE:
1131	{	988	{
1132	dREQ;	989	dREQ;
1133		990
1134	req->type = ix;	991	req->type = EIO_MKNOD;
1135	req->fh = newSVsv (oldpath);	992	req->sv1 = newSVsv (pathname);
1136	req->data2ptr = SvPVbyte_nolen (req->fh);	993	req->ptr1 = SvPVbyte_nolen (req->sv1);
1137	req->data = newSVsv (newpath);	994	req->int2 = (mode_t)mode;
1138	req->dataptr = SvPVbyte_nolen (req->data);	995	req->offs = dev;
1139		996
1140	REQ_SEND;	997	REQ_SEND;
1141	}	998	}
1142		999
1143	void	1000	void
1144	aio_sleep (delay,callback=&PL_sv_undef)	1001	aio_busy (double delay, SV *callback=&PL_sv_undef)
1145	double delay
1146	SV * callback
1147	PPCODE:	1002	PPCODE:
1148	{	1003	{
1149	dREQ;	1004	dREQ;
1150		1005
1151	req->type = REQ_SLEEP;	1006	req->type = EIO_BUSY;
1152	req->fd = delay < 0. ? 0 : delay;	1007	req->nv1 = delay < 0. ? 0. : delay;
1153	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1154		1008
1155	REQ_SEND;	1009	REQ_SEND;
1156	}	1010	}
1157		1011
1158	void	1012	void
1159	aio_group (callback=&PL_sv_undef)	1013	aio_group (SV *callback=&PL_sv_undef)
1160	SV * callback
1161	PROTOTYPE: ;$	1014	PROTOTYPE: ;$
1162	PPCODE:	1015	PPCODE:
1163	{	1016	{
1164	dREQ;	1017	dREQ;
		1018
1165	req->type = REQ_GROUP;	1019	req->type = EIO_GROUP;
1166	req->grp_next = req;
1167	req->grp_prev = req;
1168		1020
1169	req_send (req);	1021	req_submit (req);
1170	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1022	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1171	}	1023	}
		1024
		1025	void
		1026	aio_nop (SV *callback=&PL_sv_undef)
		1027	ALIAS:
		1028	aio_nop = EIO_NOP
		1029	aio_sync = EIO_SYNC
		1030	PPCODE:
		1031	{
		1032	dREQ;
		1033
		1034	req->type = ix;
		1035
		1036	REQ_SEND;
		1037	}
		1038
		1039	int
		1040	aioreq_pri (int pri = 0)
		1041	PROTOTYPE: ;$
		1042	CODE:
		1043	RETVAL = next_pri;
		1044	if (items > 0)
		1045	{
		1046	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1047	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1048	next_pri = pri;
		1049	}
		1050	OUTPUT:
		1051	RETVAL
		1052
		1053	void
		1054	aioreq_nice (int nice = 0)
		1055	CODE:
		1056	nice = next_pri - nice;
		1057	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1058	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1059	next_pri = nice;
1172		1060
1173	void	1061	void
1174	flush ()	1062	flush ()
1175	PROTOTYPE:	1063	PROTOTYPE:
1176	CODE:	1064	CODE:
1177	while (nreqs)	1065	while (eio_nreqs ())
1178	{	1066	{
1179	poll_wait ();	1067	poll_wait ();
1180	poll_cb ();	1068	poll_cb ();
1181	}	1069	}
1182		1070
1183	void	1071	int
1184	poll()	1072	poll()
1185	PROTOTYPE:	1073	PROTOTYPE:
1186	CODE:	1074	CODE:
1187	if (nreqs)
1188	{
1189	poll_wait ();	1075	poll_wait ();
1190	poll_cb ();	1076	RETVAL = poll_cb ();
1191	}	1077	OUTPUT:
		1078	RETVAL
1192		1079
1193	int	1080	int
1194	poll_fileno()	1081	poll_fileno()
1195	PROTOTYPE:	1082	PROTOTYPE:
1196	CODE:	1083	CODE:
1197	RETVAL = respipe [0];	1084	RETVAL = s_epipe_fd (&respipe);
1198	OUTPUT:	1085	OUTPUT:
1199	RETVAL	1086	RETVAL
1200		1087
1201	int	1088	int
1202	poll_cb(...)	1089	poll_cb(...)
…		…
1208		1095
1209	void	1096	void
1210	poll_wait()	1097	poll_wait()
1211	PROTOTYPE:	1098	PROTOTYPE:
1212	CODE:	1099	CODE:
1213	if (nreqs)
1214	poll_wait ();	1100	poll_wait ();
1215		1101
1216	int	1102	int
1217	nreqs()	1103	nreqs()
1218	PROTOTYPE:	1104	PROTOTYPE:
1219	CODE:	1105	CODE:
1220	RETVAL = nreqs;	1106	RETVAL = eio_nreqs ();
1221	OUTPUT:	1107	OUTPUT:
1222	RETVAL	1108	RETVAL
1223		1109
		1110	int
		1111	nready()
		1112	PROTOTYPE:
		1113	CODE:
		1114	RETVAL = eio_nready ();
		1115	OUTPUT:
		1116	RETVAL
		1117
		1118	int
		1119	npending()
		1120	PROTOTYPE:
		1121	CODE:
		1122	RETVAL = eio_npending ();
		1123	OUTPUT:
		1124	RETVAL
		1125
		1126	int
		1127	nthreads()
		1128	PROTOTYPE:
		1129	CODE:
		1130	RETVAL = eio_nthreads ();
		1131	OUTPUT:
		1132	RETVAL
		1133
		1134	int
		1135	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1136	PROTOTYPE: $$$$
		1137	CODE:
		1138	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1139	RETVAL = posix_fadvise (fh, offset, length, advice);
		1140	#else
		1141	RETVAL = errno = ENOSYS;
		1142	#endif
		1143	OUTPUT:
		1144	RETVAL
		1145
		1146	ssize_t
		1147	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1148	PROTOTYPE: $$$$
		1149	CODE:
		1150	eio_sendfile_sync (ofh, ifh, offset, count);
		1151
		1152	void _on_next_submit (SV *cb)
		1153	CODE:
		1154	SvREFCNT_dec (on_next_submit);
		1155	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1156
1224	PROTOTYPES: DISABLE	1157	PROTOTYPES: DISABLE
1225		1158
1226	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1159	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1227		1160
1228	void	1161	void
1229	cancel (aio_req_ornot req)	1162	cancel (aio_req_ornot req)
1230	PROTOTYPE:
1231	CODE:	1163	CODE:
1232	req_cancel (req);	1164	eio_cancel (req);
		1165
		1166	void
		1167	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1168	PPCODE:
		1169	{
		1170	if (GIMME_V != G_VOID)
		1171	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1172
		1173	if (items > 1)
		1174	{
		1175	SV *cb_cv =get_cb (callback);
		1176
		1177	SvREFCNT_dec (req->callback);
		1178	req->callback = SvREFCNT_inc (cb_cv);
		1179	}
		1180	}
1233		1181
1234	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1182	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1235		1183
1236	void	1184	void
1237	add (aio_req grp, ...)	1185	add (aio_req grp, ...)
1238	PPCODE:	1186	PPCODE:
1239	{	1187	{
1240	int i;	1188	int i;
1241		1189
		1190	if (grp->int1 == 2)
		1191	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1192
1242	for (i = 1; i < items; ++i )	1193	for (i = 1; i < items; ++i )
1243	{	1194	{
		1195	aio_req req;
		1196
1244	if (GIMME_V != G_VOID)	1197	if (GIMME_V != G_VOID)
1245	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1198	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1246		1199
1247	aio_req req = SvAIO_REQ (ST (i));	1200	req = SvAIO_REQ (ST (i));
1248		1201
1249	if (req)	1202	if (req)
1250	{	1203	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	}	1204	}
1258	}
1259	}	1205	}
		1206
		1207	void
		1208	cancel_subs (aio_req_ornot req)
		1209	CODE:
		1210	req_cancel_subs (req);
1260		1211
1261	void	1212	void
1262	result (aio_req grp, ...)	1213	result (aio_req grp, ...)
1263	CODE:	1214	CODE:
1264	{	1215	{
1265	int i;	1216	int i;
1266	AV *av = newAV ();	1217	AV *av;
1267		1218
1268	if (grp->data)	1219	grp->errorno = errno;
1269	SvREFCNT_dec (grp->data);
1270		1220
		1221	av = newAV ();
		1222	av_extend (av, items - 1);
		1223
1271	for (i = 1; i < items; ++i )	1224	for (i = 1; i < items; ++i )
1272	av_push (av, newSVsv (ST (i)));	1225	av_push (av, newSVsv (ST (i)));
1273		1226
		1227	SvREFCNT_dec (grp->sv1);
1274	grp->data = (SV *)av;	1228	grp->sv1 = (SV *)av;
1275	}	1229	}
1276		1230
		1231	void
		1232	errno (aio_req grp, int errorno = errno)
		1233	CODE:
		1234	grp->errorno = errorno;
		1235
		1236	void
		1237	limit (aio_req grp, int limit)
		1238	CODE:
		1239	eio_grp_limit (grp, limit);
		1240
		1241	void
		1242	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1243	CODE:
		1244	{
		1245	SvREFCNT_dec (grp->sv2);
		1246	grp->sv2 = newSVsv (callback);
		1247	grp->feed = aio_grp_feed;
		1248
		1249	if (grp->int2 <= 0)
		1250	grp->int2 = 2;
		1251
		1252	eio_grp_limit (grp, grp->int2);
		1253	}
		1254

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