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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 1.128 by root, Tue Sep 30 14:07:59 2008 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"
9
10	#include <pthread.h>
11
12	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
13	#include <errno.h>	11	#include <errno.h>
14	#include <sys/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	12	#include <sys/types.h>
17	#include <sys/stat.h>	13	#include <sys/stat.h>
18	#include <limits.h>	14	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	15	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	16	#include <sched.h>
23		17
24	#if HAVE_SENDFILE	18	/* perl namespace pollution */
25	# if __linux	19	#undef VERSION
26	# include <sys/sendfile.h>	20
27	# elif __freebsd	21	#ifdef _WIN32
28	# include <sys/socket.h>	22
29	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
30	# elif __hpux	24	# undef malloc
31	# include <sys/socket.h>	25	# undef free
32	# elif __solaris /* not yet */	26
33	# include <sys/sendfile.h>	27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
34	# else	59	#else
35	# error sendfile support requested but not available	60
36	# endif	61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
37	#endif	68	#endif
38		69
39	/* used for struct dirent, AIX doesn't provide it */	70	/* perl stupidly overrides readdir and maybe others */
40	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
41	# define NAME_MAX 4096	72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
		81	#else
		82	# define SvVAL64 SvNV
42	#endif	83	#endif
43		84
44	#if __ia64	85	/*****************************************************************************/
45	# define STACKSIZE 65536	86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
46	#else	89	#else
47	# define STACKSIZE 8192	90	# define expect(expr,value) (expr)
48	#endif	91	#endif
49		92
50	enum {	93	#define expect_false(expr) expect ((expr) != 0, 0)
51	REQ_QUIT,	94	#define expect_true(expr) expect ((expr) != 0, 1)
52	REQ_OPEN, REQ_CLOSE,	95
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	96	/*****************************************************************************/
54	REQ_SENDFILE,	97
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	98	static HV *stash;
56	REQ_FSYNC, REQ_FDATASYNC,	99	typedef SV SV8; /* byte-sv, used for argument-checking */
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,
61	REQ_GROUP,
62	};
63		100
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	101	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	102	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		103
67	typedef struct aio_cb	104	#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;	105	SV *callback; \
76	SV *fh, *fh2;	106	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;	107	STRLEN stroffset; \
87	mode_t mode; /* open */	108	SV *self;
88	unsigned char cancelled;
89	} aio_cb;
90		109
		110	#define EIO_NO_WRAPPERS 1
		111
		112	#include "libeio/eio.h"
		113
		114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void aio_grp_feed (eio_req *grp);
		117	#define EIO_FEED(req) aio_grp_feed (req)
		118	static void req_destroy (eio_req *grp);
		119	#define EIO_DESTROY(req) req_destroy (req)
		120
		121	enum {
		122	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		123	};
		124
		125	#include "libeio/eio.c"
		126
91	typedef aio_cb *aio_req;	127	typedef eio_req *aio_req;
92	typedef aio_cb *aio_req_ornot;	128	typedef eio_req *aio_req_ornot;
93		129
94	static int started, wanted;	130	static SV *on_next_submit;
95	static volatile int nreqs;	131	static int next_pri = EIO_PRI_DEFAULT;
96	static int max_outstanding = 1<<30;	132	static int max_outstanding;
97	static int respipe [2];
98		133
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	134	static int respipe_osf [2], respipe [2] = { -1, -1 };
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		135
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	136	static void req_destroy (aio_req req);
104	static volatile aio_req ress, rese; /* queue start, queue end */
105
106	static void req_free (aio_req req);	137	static void req_cancel (aio_req req);
		138
		139	static void want_poll (void)
		140	{
		141	/* write a dummy byte to the pipe so fh becomes ready */
		142	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		143	}
		144
		145	static void done_poll (void)
		146	{
		147	/* read any signals sent by the worker threads */
		148	char buf [4];
		149	while (respipe_read (respipe [0], buf, 4) == 4)
		150	;
		151	}
107		152
108	/* must be called at most once */	153	/* must be called at most once */
109	static SV *req_sv (aio_req req, const char *klass)	154	static SV *req_sv (aio_req req, const char *klass)
110	{	155	{
		156	if (!req->self)
		157	{
111	req->self = (SV *)newHV ();	158	req->self = (SV *)newHV ();
112	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	159	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		160	}
113		161
114	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	162	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
115	}	163	}
116		164
117	static aio_req SvAIO_REQ (SV *sv)	165	static aio_req SvAIO_REQ (SV *sv)
118	{	166	{
		167	MAGIC *mg;
		168
119	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	169	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
120	croak ("object of class " AIO_REQ_KLASS " expected");	170	croak ("object of class " AIO_REQ_KLASS " expected");
121		171
122	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	172	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
123		173
124	return mg ? (aio_req)mg->mg_ptr : 0;	174	return mg ? (aio_req)mg->mg_ptr : 0;
125	}	175	}
126		176
127	static void poll_wait ()	177	static void aio_grp_feed (aio_req grp)
128	{	178	{
129	if (nreqs && !ress)	179	if (grp->sv2 && SvOK (grp->sv2))
130	{	180	{
131	fd_set rfd;	181	dSP;
132	FD_ZERO(&rfd);
133	FD_SET(respipe [0], &rfd);
134		182
135	select (respipe [0] + 1, &rfd, 0, 0, 0);	183	ENTER;
		184	SAVETMPS;
		185	PUSHMARK (SP);
		186	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		187	PUTBACK;
		188	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		189	SPAGAIN;
		190	FREETMPS;
		191	LEAVE;
136	}	192	}
137	}	193	}
138		194
		195	static void req_submit (eio_req *req)
		196	{
		197	eio_submit (req);
		198
		199	if (expect_false (on_next_submit))
		200	{
		201	dSP;
		202	SV *cb = sv_2mortal (on_next_submit);
		203
		204	on_next_submit = 0;
		205
		206	PUSHMARK (SP);
		207	PUTBACK;
		208	call_sv (cb, G_DISCARD | G_EVAL);
		209	}
		210	}
		211
139	static void req_invoke (aio_req req)	212	static int req_invoke (eio_req *req)
140	{	213	{
141	dSP;	214	dSP;
142	int errorno = errno;
143		215
144	if (req->cancelled || !SvOK (req->callback))	216	if (req->flags & FLAG_SV2_RO_OFF)
145	return;	217	SvREADONLY_off (req->sv2);
146		218
147	errno = req->errorno;	219	if (!EIO_CANCELLED (req) && req->callback)
148
149	ENTER;
150	PUSHMARK (SP);
151	EXTEND (SP, 1);
152
153	switch (req->type)
154	{	220	{
155	case REQ_READDIR:	221	ENTER;
		222	SAVETMPS;
		223	PUSHMARK (SP);
		224	EXTEND (SP, 1);
		225
		226	switch (req->type)
156	{	227	{
157	SV *rv = &PL_sv_undef;	228	case EIO_READDIR:
158
159	if (req->result >= 0)
160	{	229	{
161	char *buf = req->data2ptr;	230	SV *rv = &PL_sv_undef;
162	AV *av = newAV ();
163		231
164	while (req->result)	232	if (req->result >= 0)
165	{	233	{
		234	int i;
		235	char *buf = req->ptr2;
		236	AV *av = newAV ();
		237
		238	av_extend (av, req->result - 1);
		239
		240	for (i = 0; i < req->result; ++i)
		241	{
166	SV *sv = newSVpv (buf, 0);	242	SV *sv = newSVpv (buf, 0);
167		243
168	av_push (av, sv);	244	av_store (av, i, sv);
169	buf += SvCUR (sv) + 1;	245	buf += SvCUR (sv) + 1;
170	req->result--;	246	}
		247
		248	rv = sv_2mortal (newRV_noinc ((SV *)av));
171	}	249	}
172		250
173	rv = sv_2mortal (newRV_noinc ((SV *)av));	251	PUSHs (rv);
174	}	252	}
		253	break;
175		254
		255	case EIO_OPEN:
		256	{
		257	/* convert fd to fh */
		258	SV *fh = &PL_sv_undef;
		259
		260	if (req->result >= 0)
		261	{
		262	GV *gv = (GV *)sv_newmortal ();
		263	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		264	char sym [64];
		265	int symlen;
		266
		267	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		268	gv_init (gv, stash, sym, symlen, 0);
		269
		270	symlen = snprintf (
		271	sym,
		272	sizeof (sym),
		273	"%s&=%d",
		274	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		275	req->result
		276	);
		277
		278	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		279	fh = (SV *)gv;
		280	}
		281
176	PUSHs (rv);	282	PUSHs (fh);
		283	}
		284	break;
		285
		286	case EIO_GROUP:
		287	req->int1 = 2; /* mark group as finished */
		288
		289	if (req->sv1)
		290	{
		291	int i;
		292	AV *av = (AV *)req->sv1;
		293
		294	EXTEND (SP, AvFILL (av) + 1);
		295	for (i = 0; i <= AvFILL (av); ++i)
		296	PUSHs (*av_fetch (av, i, 0));
		297	}
		298	break;
		299
		300	case EIO_NOP:
		301	case EIO_BUSY:
		302	break;
		303
		304	case EIO_READLINK:
		305	if (req->result > 0)
		306	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		307	break;
		308
		309	case EIO_STAT:
		310	case EIO_LSTAT:
		311	case EIO_FSTAT:
		312	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		313	PL_laststatval = req->result;
		314	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		315	PUSHs (sv_2mortal (newSViv (req->result)));
		316	break;
		317
		318	case EIO_READ:
		319	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		320	*SvEND (req->sv2) = 0;
		321	PUSHs (sv_2mortal (newSViv (req->result)));
		322	break;
		323
		324	case EIO_DUP2:
		325	if (req->result > 0)
		326	req->result = 0;
		327	/* FALLTHROUGH */
		328
		329	default:
		330	PUSHs (sv_2mortal (newSViv (req->result)));
		331	break;
177	}	332	}
178	break;
179		333
180	case REQ_OPEN:	334	errno = req->errorno;
181	{
182	/* convert fd to fh */
183	SV *fh;
184		335
185	PUSHs (sv_2mortal (newSViv (req->result)));
186	PUTBACK;	336	PUTBACK;
187	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	337	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
188	SPAGAIN;	338	SPAGAIN;
189		339
190	fh = SvREFCNT_inc (POPs);	340	FREETMPS;
		341	LEAVE;
191		342
192	PUSHMARK (SP);	343	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	}	344	}
216		345
217		346	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	}	347	}
232		348
233	static void req_free (aio_req req)	349	static void req_destroy (aio_req req)
234	{	350	{
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)	351	if (req->self)
251	{	352	{
252	sv_unmagic (req->self, PERL_MAGIC_ext);	353	sv_unmagic (req->self, PERL_MAGIC_ext);
253	SvREFCNT_dec (req->self);	354	SvREFCNT_dec (req->self);
254	}	355	}
255		356
256	if (req->data)
257	SvREFCNT_dec (req->data);
258
259	if (req->fh)
260	SvREFCNT_dec (req->fh);	357	SvREFCNT_dec (req->sv1);
261
262	if (req->fh2)
263	SvREFCNT_dec (req->fh2);	358	SvREFCNT_dec (req->sv2);
264
265	if (req->statdata)
266	Safefree (req->statdata);
267
268	if (req->callback)
269	SvREFCNT_dec (req->callback);	359	SvREFCNT_dec (req->callback);
270
271	if (req->type == REQ_READDIR && req->result >= 0)
272	free (req->data2ptr);
273		360
274	Safefree (req);	361	Safefree (req);
275	}	362	}
276		363
277	static void req_cancel (aio_req req)	364	static void req_cancel_subs (aio_req grp)
278	{	365	{
279	req->cancelled = 1;	366	aio_req sub;
280		367
281	if (req->type == REQ_GROUP)	368	if (grp->type != EIO_GROUP)
		369	return;
		370
		371	SvREFCNT_dec (grp->sv2);
		372	grp->sv2 = 0;
		373
		374	eio_grp_cancel (grp);
		375	}
		376
		377	#ifdef USE_SOCKETS_AS_HANDLES
		378	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		379	#else
		380	# define TO_SOCKET(x) (x)
		381	#endif
		382
		383	static void
		384	create_respipe (void)
		385	{
		386	int old_readfd = respipe [0];
		387
		388	if (respipe [1] >= 0)
		389	respipe_close (TO_SOCKET (respipe [1]));
		390
		391	#ifdef _WIN32
		392	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		393	#else
		394	if (pipe (respipe))
		395	#endif
		396	croak ("unable to initialize result pipe");
		397
		398	if (old_readfd >= 0)
282	{	399	{
283	aio_req sub;	400	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		401	croak ("unable to initialize result pipe(2)");
284		402
285	for (sub = req->grp_next; sub != req; sub = sub->grp_next)	403	respipe_close (respipe [0]);
286	req_cancel (sub);	404	respipe [0] = old_readfd;
287	}	405	}
288	}
289		406
		407	#ifdef _WIN32
		408	int arg = 1;
		409	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		410	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		411	#else
		412	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		413	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		414	#endif
		415	croak ("unable to initialize result pipe(3)");
		416
		417	respipe_osf [0] = TO_SOCKET (respipe [0]);
		418	respipe_osf [1] = TO_SOCKET (respipe [1]);
		419	}
		420
		421	static void poll_wait (void)
		422	{
		423	fd_set rfd;
		424
		425	while (eio_nreqs ())
		426	{
		427	int size;
		428
		429	X_LOCK (reslock);
		430	size = res_queue.size;
		431	X_UNLOCK (reslock);
		432
		433	if (size)
		434	return;
		435
		436	etp_maybe_start_thread ();
		437
		438	FD_ZERO (&rfd);
		439	FD_SET (respipe [0], &rfd);
		440
		441	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		442	}
		443	}
		444
290	static int poll_cb ()	445	static int poll_cb (void)
291	{	446	{
292	dSP;
293	int count = 0;
294	int do_croak = 0;
295	aio_req req;
296
297	for (;;)	447	for (;;)
298	{	448	{
299	pthread_mutex_lock (&reslock);	449	int res = eio_poll ();
300	req = ress;
301		450
302	if (req)	451	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;	452	croak (0);
321		453
322	nreqs--;	454	if (!max_outstanding || max_outstanding > eio_nreqs ())
		455	return res;
323		456
324	if (req->type == REQ_QUIT)	457	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	}	458	}
353
354	return count;
355	}	459	}
356		460
357	static void *aio_proc(void *arg);
358
359	static void start_thread (void)	461	static void atfork_child (void)
360	{	462	{
361	sigset_t fullsigset, oldsigset;	463	create_respipe ();
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	}	464	}
377		465
378	static void req_send (aio_req req)	466	static SV *
		467	get_cb (SV *cb_sv)
379	{	468	{
380	while (started < wanted && nreqs >= started)	469	HV *st;
381	start_thread ();	470	GV *gvp;
		471	CV *cv;
382		472
383	nreqs++;	473	if (!SvOK (cb_sv))
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;	474	return 0;
565		475
566	#if HAVE_SENDFILE	476	cv = sv_2cv (cb_sv, &st, &gvp, 0);
567	# if __linux
568	res = sendfile (ofd, ifd, &offset, count);
569		477
570	# elif __freebsd	478	if (!cv)
571	/*	479	croak ("IO::AIO watcher callback must be undef or a CODE reference");
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		480
579	if (res < 0 && sbytes)	481	return (SV *)cv;
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	}	482	}
869		483
870	#define dREQ \	484	#define dREQ \
		485	SV *cb_cv; \
871	aio_req req; \	486	aio_req req; \
		487	int req_pri = next_pri; \
		488	next_pri = EIO_PRI_DEFAULT; \
872	\	489	\
873	if (SvOK (callback) && !SvROK (callback)) \	490	cb_cv = get_cb (callback); \
874	croak ("callback must be undef or of reference type"); \
875	\	491	\
876	Newz (0, req, 1, aio_cb); \	492	Newz (0, req, 1, eio_req); \
877	if (!req) \	493	if (!req) \
878	croak ("out of memory during aio_req allocation"); \	494	croak ("out of memory during eio_req allocation"); \
879	\	495	\
880	req->callback = newSVsv (callback)	496	req->callback = SvREFCNT_inc (cb_cv); \
		497	req->pri = req_pri
881		498
882	#define REQ_SEND \	499	#define REQ_SEND \
		500	PUTBACK; \
883	req_send (req); \	501	req_submit (req); \
		502	SPAGAIN; \
884	\	503	\
885	if (GIMME_V != G_VOID) \	504	if (GIMME_V != G_VOID) \
886	XPUSHs (req_sv (req, AIO_REQ_KLASS));	505	XPUSHs (req_sv (req, AIO_REQ_KLASS));
887		506
888	MODULE = IO::AIO PACKAGE = IO::AIO	507	MODULE = IO::AIO PACKAGE = IO::AIO
889		508
890	PROTOTYPES: ENABLE	509	PROTOTYPES: ENABLE
891		510
892	BOOT:	511	BOOT:
893	{	512	{
894	HV *stash = gv_stashpv ("IO::AIO", 1);	513	stash = gv_stashpv ("IO::AIO", 1);
		514
895	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	515	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
896	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	516	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
897	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	517	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		518	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		519	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		520	#ifndef _WIN32
		521	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		522	#endif
898		523
899	create_pipe ();	524	create_respipe ();
900	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
901	}
902		525
		526	if (eio_init (want_poll, done_poll) < 0)
		527	croak ("IO::AIO: unable to initialise eio library");
		528
		529	/* atfork child called in fifo order, so before eio's handler */
		530	X_THREAD_ATFORK (0, 0, atfork_child);
		531	}
		532
903	void	533	void
904	min_parallel (nthreads)	534	max_poll_reqs (int nreqs)
905	int nthreads
906	PROTOTYPE: $	535	PROTOTYPE: $
		536	CODE:
		537	eio_set_max_poll_reqs (nreqs);
907		538
908	void	539	void
909	max_parallel (nthreads)	540	max_poll_time (double nseconds)
910	int nthreads
911	PROTOTYPE: $	541	PROTOTYPE: $
912
913	int
914	max_outstanding (nreqs)
915	int nreqs
916	PROTOTYPE: $
917	CODE:	542	CODE:
918	RETVAL = max_outstanding;	543	eio_set_max_poll_time (nseconds);
		544
		545	void
		546	min_parallel (int nthreads)
		547	PROTOTYPE: $
		548	CODE:
		549	eio_set_min_parallel (nthreads);
		550
		551	void
		552	max_parallel (int nthreads)
		553	PROTOTYPE: $
		554	CODE:
		555	eio_set_max_parallel (nthreads);
		556
		557	void
		558	max_idle (int nthreads)
		559	PROTOTYPE: $
		560	CODE:
		561	eio_set_max_idle (nthreads);
		562
		563	void
		564	max_outstanding (int maxreqs)
		565	PROTOTYPE: $
		566	CODE:
919	max_outstanding = nreqs;	567	max_outstanding = maxreqs;
920		568
921	void	569	void
922	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	570	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: $$$;$	571	PROTOTYPE: $$$;$
928	PPCODE:	572	PPCODE:
929	{	573	{
930	dREQ;	574	dREQ;
931		575
932	req->type = REQ_OPEN;	576	req->type = EIO_OPEN;
933	req->data = newSVsv (pathname);	577	req->sv1 = newSVsv (pathname);
934	req->dataptr = SvPVbyte_nolen (req->data);	578	req->ptr1 = SvPVbyte_nolen (req->sv1);
935	req->fd = flags;	579	req->int1 = flags;
936	req->mode = mode;	580	req->int2 = mode;
937		581
938	REQ_SEND;	582	REQ_SEND;
939	}	583	}
940		584
941	void	585	void
942	aio_close (fh,callback=&PL_sv_undef)	586	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
943	SV * fh
944	SV * callback
945	PROTOTYPE: $;$	587	PROTOTYPE: $;$
946	ALIAS:	588	ALIAS:
947	aio_close = REQ_CLOSE
948	aio_fsync = REQ_FSYNC	589	aio_fsync = EIO_FSYNC
949	aio_fdatasync = REQ_FDATASYNC	590	aio_fdatasync = EIO_FDATASYNC
950	PPCODE:	591	PPCODE:
951	{	592	{
952	dREQ;	593	dREQ;
953		594
954	req->type = ix;	595	req->type = ix;
955	req->fh = newSVsv (fh);	596	req->sv1 = newSVsv (fh);
956	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	597	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
957		598
958	REQ_SEND (req);	599	REQ_SEND (req);
959	}	600	}
960		601
961	void	602	void
		603	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		604	PROTOTYPE: $;$
		605	PPCODE:
		606	{
		607	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		608	dREQ;
		609
		610	if (close_pipe < 0)
		611	{
		612	int pipefd [2];
		613
		614	if (pipe (pipefd) < 0
		615	|| close (pipefd [1]) < 0
		616	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		617	abort (); /*D*/
		618
		619	close_pipe = pipefd [0];
		620	}
		621
		622	req->type = EIO_DUP2;
		623	req->int1 = close_pipe;
		624	req->sv2 = newSVsv (fh);
		625	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		626
		627	REQ_SEND (req);
		628	}
		629
		630	void
962	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	631	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:	632	ALIAS:
970	aio_read = REQ_READ	633	aio_read = EIO_READ
971	aio_write = REQ_WRITE	634	aio_write = EIO_WRITE
972	PROTOTYPE: $$$$$;$	635	PROTOTYPE: $$$$$;$
973	PPCODE:	636	PPCODE:
974	{	637	{
975	aio_req req;
976	STRLEN svlen;	638	STRLEN svlen;
977	char *svptr = SvPVbyte (data, svlen);	639	char *svptr = SvPVbyte (data, svlen);
		640	UV len = SvUV (length);
978		641
979	SvUPGRADE (data, SVt_PV);	642	SvUPGRADE (data, SVt_PV);
980	SvPOK_on (data);	643	SvPOK_on (data);
981		644
982	if (dataoffset < 0)	645	if (dataoffset < 0)
983	dataoffset += svlen;	646	dataoffset += svlen;
984		647
985	if (dataoffset < 0 || dataoffset > svlen)	648	if (dataoffset < 0 || dataoffset > svlen)
986	croak ("data offset outside of string");	649	croak ("dataoffset outside of data scalar");
987		650
988	if (ix == REQ_WRITE)	651	if (ix == EIO_WRITE)
989	{	652	{
990	/* write: check length and adjust. */	653	/* write: check length and adjust. */
991	if (length < 0 || length + dataoffset > svlen)	654	if (!SvOK (length) || len + dataoffset > svlen)
992	length = svlen - dataoffset;	655	len = svlen - dataoffset;
993	}	656	}
994	else	657	else
995	{	658	{
996	/* read: grow scalar as necessary */	659	/* read: grow scalar as necessary */
997	svptr = SvGROW (data, length + dataoffset);	660	svptr = SvGROW (data, len + dataoffset + 1);
998	}	661	}
999		662
1000	if (length < 0)	663	if (len < 0)
1001	croak ("length must not be negative");	664	croak ("length must not be negative");
1002		665
1003	{	666	{
1004	dREQ;	667	dREQ;
1005		668
1006	req->type = ix;	669	req->type = ix;
1007	req->fh = newSVsv (fh);	670	req->sv1 = newSVsv (fh);
1008	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	671	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1009	: IoOFP (sv_2io (fh)));	672	: IoOFP (sv_2io (fh)));
		673	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1010	req->offset = offset;	674	req->size = len;
1011	req->length = length;
1012	req->data = SvREFCNT_inc (data);	675	req->sv2 = SvREFCNT_inc (data);
1013	req->dataptr = (char *)svptr + dataoffset;	676	req->ptr2 = (char *)svptr + dataoffset;
		677	req->stroffset = dataoffset;
1014		678
1015	if (!SvREADONLY (data))	679	if (!SvREADONLY (data))
1016	{	680	{
1017	SvREADONLY_on (data);	681	SvREADONLY_on (data);
1018	req->data2ptr = (void *)data;	682	req->flags |= FLAG_SV2_RO_OFF;
1019	}	683	}
1020		684
1021	REQ_SEND;	685	REQ_SEND;
1022	}	686	}
1023	}	687	}
1024		688
1025	void	689	void
		690	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		691	PROTOTYPE: $$;$
		692	PPCODE:
		693	{
		694	SV *data;
		695	dREQ;
		696
		697	req->type = EIO_READLINK;
		698	req->sv1 = newSVsv (path);
		699	req->ptr1 = SvPVbyte_nolen (req->sv1);
		700
		701	REQ_SEND;
		702	}
		703
		704	void
1026	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	705	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: $$$$;$	706	PROTOTYPE: $$$$;$
1033	PPCODE:	707	PPCODE:
1034	{	708	{
1035	dREQ;	709	dREQ;
1036		710
1037	req->type = REQ_SENDFILE;	711	req->type = EIO_SENDFILE;
1038	req->fh = newSVsv (out_fh);	712	req->sv1 = newSVsv (out_fh);
1039	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	713	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1040	req->fh2 = newSVsv (in_fh);	714	req->sv2 = newSVsv (in_fh);
1041	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	715	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1042	req->offset = in_offset;	716	req->offs = SvVAL64 (in_offset);
1043	req->length = length;	717	req->size = length;
1044		718
1045	REQ_SEND;	719	REQ_SEND;
1046	}	720	}
1047		721
1048	void	722	void
1049	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	723	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1050	SV * fh
1051	UV offset
1052	IV length
1053	SV * callback
1054	PROTOTYPE: $$$;$	724	PROTOTYPE: $$$;$
1055	PPCODE:	725	PPCODE:
1056	{	726	{
1057	dREQ;	727	dREQ;
1058		728
1059	req->type = REQ_READAHEAD;	729	req->type = EIO_READAHEAD;
1060	req->fh = newSVsv (fh);	730	req->sv1 = newSVsv (fh);
1061	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	731	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1062	req->offset = offset;	732	req->offs = SvVAL64 (offset);
1063	req->length = length;	733	req->size = length;
1064		734
1065	REQ_SEND;	735	REQ_SEND;
1066	}	736	}
1067		737
1068	void	738	void
1069	aio_stat (fh_or_path,callback=&PL_sv_undef)	739	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1070	SV * fh_or_path
1071	SV * callback
1072	ALIAS:	740	ALIAS:
1073	aio_stat = REQ_STAT	741	aio_stat = EIO_STAT
1074	aio_lstat = REQ_LSTAT	742	aio_lstat = EIO_LSTAT
1075	PPCODE:	743	PPCODE:
1076	{	744	{
1077	dREQ;	745	dREQ;
1078		746
1079	New (0, req->statdata, 1, Stat_t);	747	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		748
1086	if (SvPOK (fh_or_path))	749	if (SvPOK (req->sv1))
1087	{	750	{
1088	req->type = ix;	751	req->type = ix;
1089	req->data = newSVsv (fh_or_path);
1090	req->dataptr = SvPVbyte_nolen (req->data);	752	req->ptr1 = SvPVbyte_nolen (req->sv1);
1091	}	753	}
1092	else	754	else
1093	{	755	{
1094	req->type = REQ_FSTAT;	756	req->type = EIO_FSTAT;
1095	req->fh = newSVsv (fh_or_path);
1096	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	757	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1097	}	758	}
1098		759
1099	REQ_SEND;	760	REQ_SEND;
1100	}	761	}
1101		762
1102	void	763	void
		764	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		765	PPCODE:
		766	{
		767	dREQ;
		768
		769	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		770	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		771	req->sv1 = newSVsv (fh_or_path);
		772
		773	if (SvPOK (req->sv1))
		774	{
		775	req->type = EIO_UTIME;
		776	req->ptr1 = SvPVbyte_nolen (req->sv1);
		777	}
		778	else
		779	{
		780	req->type = EIO_FUTIME;
		781	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		782	}
		783
		784	REQ_SEND;
		785	}
		786
		787	void
		788	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		789	PPCODE:
		790	{
		791	dREQ;
		792
		793	req->sv1 = newSVsv (fh_or_path);
		794	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		795
		796	if (SvPOK (req->sv1))
		797	{
		798	req->type = EIO_TRUNCATE;
		799	req->ptr1 = SvPVbyte_nolen (req->sv1);
		800	}
		801	else
		802	{
		803	req->type = EIO_FTRUNCATE;
		804	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		805	}
		806
		807	REQ_SEND;
		808	}
		809
		810	void
		811	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		812	ALIAS:
		813	aio_chmod = EIO_CHMOD
		814	aio_mkdir = EIO_MKDIR
		815	PPCODE:
		816	{
		817	dREQ;
		818
		819	req->int2 = mode;
		820	req->sv1 = newSVsv (fh_or_path);
		821
		822	if (SvPOK (req->sv1))
		823	{
		824	req->type = ix;
		825	req->ptr1 = SvPVbyte_nolen (req->sv1);
		826	}
		827	else
		828	{
		829	req->type = EIO_FCHMOD;
		830	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		831	}
		832
		833	REQ_SEND;
		834	}
		835
		836	void
		837	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		838	PPCODE:
		839	{
		840	dREQ;
		841
		842	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		843	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		844	req->sv1 = newSVsv (fh_or_path);
		845
		846	if (SvPOK (req->sv1))
		847	{
		848	req->type = EIO_CHOWN;
		849	req->ptr1 = SvPVbyte_nolen (req->sv1);
		850	}
		851	else
		852	{
		853	req->type = EIO_FCHOWN;
		854	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		855	}
		856
		857	REQ_SEND;
		858	}
		859
		860	void
1103	aio_unlink (pathname,callback=&PL_sv_undef)	861	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1104	SV * pathname
1105	SV * callback
1106	ALIAS:	862	ALIAS:
1107	aio_unlink = REQ_UNLINK	863	aio_unlink = EIO_UNLINK
1108	aio_rmdir = REQ_RMDIR	864	aio_rmdir = EIO_RMDIR
1109	aio_readdir = REQ_READDIR	865	aio_readdir = EIO_READDIR
1110	PPCODE:	866	PPCODE:
1111	{	867	{
1112	dREQ;	868	dREQ;
1113		869
1114	req->type = ix;	870	req->type = ix;
1115	req->data = newSVsv (pathname);	871	req->sv1 = newSVsv (pathname);
1116	req->dataptr = SvPVbyte_nolen (req->data);	872	req->ptr1 = SvPVbyte_nolen (req->sv1);
		873
		874	REQ_SEND;
		875	}
		876
		877	void
		878	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		879	ALIAS:
		880	aio_link = EIO_LINK
		881	aio_symlink = EIO_SYMLINK
		882	aio_rename = EIO_RENAME
		883	PPCODE:
		884	{
		885	dREQ;
		886
		887	req->type = ix;
		888	req->sv1 = newSVsv (oldpath);
		889	req->ptr1 = SvPVbyte_nolen (req->sv1);
		890	req->sv2 = newSVsv (newpath);
		891	req->ptr2 = SvPVbyte_nolen (req->sv2);
1117		892
1118	REQ_SEND;	893	REQ_SEND;
1119	}	894	}
1120		895
1121	void	896	void
1122	aio_link (oldpath,newpath,callback=&PL_sv_undef)	897	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:	898	PPCODE:
1131	{	899	{
1132	dREQ;	900	dREQ;
1133		901
1134	req->type = ix;	902	req->type = EIO_MKNOD;
1135	req->fh = newSVsv (oldpath);	903	req->sv1 = newSVsv (pathname);
1136	req->data2ptr = SvPVbyte_nolen (req->fh);	904	req->ptr1 = SvPVbyte_nolen (req->sv1);
1137	req->data = newSVsv (newpath);	905	req->int2 = (mode_t)mode;
1138	req->dataptr = SvPVbyte_nolen (req->data);	906	req->offs = dev;
1139		907
1140	REQ_SEND;	908	REQ_SEND;
1141	}	909	}
1142		910
1143	void	911	void
1144	aio_sleep (delay,callback=&PL_sv_undef)	912	aio_busy (double delay, SV *callback=&PL_sv_undef)
1145	double delay
1146	SV * callback
1147	PPCODE:	913	PPCODE:
1148	{	914	{
1149	dREQ;	915	dREQ;
1150		916
1151	req->type = REQ_SLEEP;	917	req->type = EIO_BUSY;
1152	req->fd = delay < 0. ? 0 : delay;	918	req->nv1 = delay < 0. ? 0. : delay;
1153	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1154		919
1155	REQ_SEND;	920	REQ_SEND;
1156	}	921	}
1157		922
1158	void	923	void
1159	aio_group (callback=&PL_sv_undef)	924	aio_group (SV *callback=&PL_sv_undef)
1160	SV * callback
1161	PROTOTYPE: ;$	925	PROTOTYPE: ;$
1162	PPCODE:	926	PPCODE:
1163	{	927	{
1164	dREQ;	928	dREQ;
		929
1165	req->type = REQ_GROUP;	930	req->type = EIO_GROUP;
1166	req->grp_next = req;
1167	req->grp_prev = req;
1168		931
1169	req_send (req);	932	req_submit (req);
1170	XPUSHs (req_sv (req, AIO_GRP_KLASS));	933	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1171	}	934	}
		935
		936	void
		937	aio_nop (SV *callback=&PL_sv_undef)
		938	ALIAS:
		939	aio_nop = EIO_NOP
		940	aio_sync = EIO_SYNC
		941	PPCODE:
		942	{
		943	dREQ;
		944
		945	req->type = ix;
		946
		947	REQ_SEND;
		948	}
		949
		950	int
		951	aioreq_pri (int pri = 0)
		952	PROTOTYPE: ;$
		953	CODE:
		954	RETVAL = next_pri;
		955	if (items > 0)
		956	{
		957	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		958	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		959	next_pri = pri;
		960	}
		961	OUTPUT:
		962	RETVAL
		963
		964	void
		965	aioreq_nice (int nice = 0)
		966	CODE:
		967	nice = next_pri - nice;
		968	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		969	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		970	next_pri = nice;
1172		971
1173	void	972	void
1174	flush ()	973	flush ()
1175	PROTOTYPE:	974	PROTOTYPE:
1176	CODE:	975	CODE:
1177	while (nreqs)	976	while (eio_nreqs ())
1178	{	977	{
1179	poll_wait ();	978	poll_wait ();
1180	poll_cb ();	979	poll_cb ();
1181	}	980	}
1182		981
1183	void	982	int
1184	poll()	983	poll()
1185	PROTOTYPE:	984	PROTOTYPE:
1186	CODE:	985	CODE:
1187	if (nreqs)
1188	{
1189	poll_wait ();	986	poll_wait ();
1190	poll_cb ();	987	RETVAL = poll_cb ();
1191	}	988	OUTPUT:
		989	RETVAL
1192		990
1193	int	991	int
1194	poll_fileno()	992	poll_fileno()
1195	PROTOTYPE:	993	PROTOTYPE:
1196	CODE:	994	CODE:
…		…
1208		1006
1209	void	1007	void
1210	poll_wait()	1008	poll_wait()
1211	PROTOTYPE:	1009	PROTOTYPE:
1212	CODE:	1010	CODE:
1213	if (nreqs)
1214	poll_wait ();	1011	poll_wait ();
1215		1012
1216	int	1013	int
1217	nreqs()	1014	nreqs()
1218	PROTOTYPE:	1015	PROTOTYPE:
1219	CODE:	1016	CODE:
1220	RETVAL = nreqs;	1017	RETVAL = eio_nreqs ();
1221	OUTPUT:	1018	OUTPUT:
1222	RETVAL	1019	RETVAL
1223		1020
		1021	int
		1022	nready()
		1023	PROTOTYPE:
		1024	CODE:
		1025	RETVAL = eio_nready ();
		1026	OUTPUT:
		1027	RETVAL
		1028
		1029	int
		1030	npending()
		1031	PROTOTYPE:
		1032	CODE:
		1033	RETVAL = eio_npending ();
		1034	OUTPUT:
		1035	RETVAL
		1036
		1037	int
		1038	nthreads()
		1039	PROTOTYPE:
		1040	CODE:
		1041	RETVAL = eio_nthreads ();
		1042	OUTPUT:
		1043	RETVAL
		1044
		1045	void _on_next_submit (SV *cb)
		1046	CODE:
		1047	SvREFCNT_dec (on_next_submit);
		1048	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1049
1224	PROTOTYPES: DISABLE	1050	PROTOTYPES: DISABLE
1225		1051
1226	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1052	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1227		1053
1228	void	1054	void
1229	cancel (aio_req_ornot req)	1055	cancel (aio_req_ornot req)
1230	PROTOTYPE:
1231	CODE:	1056	CODE:
1232	req_cancel (req);	1057	eio_cancel (req);
		1058
		1059	void
		1060	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1061	PPCODE:
		1062	{
		1063	if (GIMME_V != G_VOID)
		1064	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1065
		1066	if (items > 1)
		1067	{
		1068	SV *cb_cv = get_cb (callback);
		1069
		1070	SvREFCNT_dec (req->callback);
		1071	req->callback = SvREFCNT_inc (cb_cv);
		1072	}
		1073	}
1233		1074
1234	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1075	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1235		1076
1236	void	1077	void
1237	add (aio_req grp, ...)	1078	add (aio_req grp, ...)
1238	PPCODE:	1079	PPCODE:
1239	{	1080	{
1240	int i;	1081	int i;
1241		1082
		1083	if (grp->int1 == 2)
		1084	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1085
1242	for (i = 1; i < items; ++i )	1086	for (i = 1; i < items; ++i )
1243	{	1087	{
		1088	aio_req req;
		1089
1244	if (GIMME_V != G_VOID)	1090	if (GIMME_V != G_VOID)
1245	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1091	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1246		1092
1247	aio_req req = SvAIO_REQ (ST (i));	1093	req = SvAIO_REQ (ST (i));
1248		1094
1249	if (req)	1095	if (req)
1250	{	1096	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	}	1097	}
1258	}
1259	}	1098	}
		1099
		1100	void
		1101	cancel_subs (aio_req_ornot req)
		1102	CODE:
		1103	req_cancel_subs (req);
1260		1104
1261	void	1105	void
1262	result (aio_req grp, ...)	1106	result (aio_req grp, ...)
1263	CODE:	1107	CODE:
1264	{	1108	{
1265	int i;	1109	int i;
1266	AV *av = newAV ();	1110	AV *av;
1267		1111
1268	if (grp->data)	1112	grp->errorno = errno;
1269	SvREFCNT_dec (grp->data);
1270		1113
		1114	av = newAV ();
		1115
1271	for (i = 1; i < items; ++i )	1116	for (i = 1; i < items; ++i )
1272	av_push (av, newSVsv (ST (i)));	1117	av_push (av, newSVsv (ST (i)));
1273		1118
		1119	SvREFCNT_dec (grp->sv1);
1274	grp->data = (SV *)av;	1120	grp->sv1 = (SV *)av;
1275	}	1121	}
1276		1122
		1123	void
		1124	errno (aio_req grp, int errorno = errno)
		1125	CODE:
		1126	grp->errorno = errorno;
		1127
		1128	void
		1129	limit (aio_req grp, int limit)
		1130	CODE:
		1131	eio_grp_limit (grp, limit);
		1132
		1133	void
		1134	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1135	CODE:
		1136	{
		1137	SvREFCNT_dec (grp->sv2);
		1138	grp->sv2 = newSVsv (callback);
		1139
		1140	if (grp->int2 <= 0)
		1141	grp->int2 = 2;
		1142
		1143	eio_grp_limit (grp, grp->int2);
		1144	}
		1145

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