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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.45 by root, Sun Oct 22 00:19:05 2006 UTC vs.
Revision 1.126 by root, Thu Sep 25 07:56:07 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	static HV *stash;
45	# define STACKSIZE 65536	86	typedef SV SV8; /* byte-sv, used for argument-checking */
46	#else
47	# define STACKSIZE 8192
48	#endif
49
50	enum {
51	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,
61	REQ_GROUP,
62	};
63		87
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	88	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	89	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		90
67	typedef struct aio_cb	91	#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;	92	SV *callback; \
76	SV *fh, *fh2;	93	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;	94	STRLEN stroffset; \
87	mode_t mode; /* open */	95	SV *self;
88	unsigned char cancelled;
89	} aio_cb;
90		96
		97	#define EIO_NO_WRAPPERS 1
		98
		99	#include "libeio/eio.h"
		100
		101	static int req_invoke (eio_req *req);
		102	#define EIO_FINISH(req) req_invoke (req)
		103	static void aio_grp_feed (eio_req *grp);
		104	#define EIO_FEED(req) aio_grp_feed (req)
		105	static void req_destroy (eio_req *grp);
		106	#define EIO_DESTROY(req) req_destroy (req)
		107
		108	enum {
		109	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		110	};
		111
		112	#include "libeio/eio.c"
		113
91	typedef aio_cb *aio_req;	114	typedef eio_req *aio_req;
92	typedef aio_cb *aio_req_ornot;	115	typedef eio_req *aio_req_ornot;
93	typedef aio_cb *aio_group;
94		116
95	static int started, wanted;	117	static SV *on_next_submit;
96	static volatile int nreqs;	118	static int next_pri = EIO_PRI_DEFAULT;
97	static int max_outstanding = 1<<30;	119	static int max_outstanding;
98	static int respipe [2];
99		120
100	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	121	static int respipe_osf [2], respipe [2] = { -1, -1 };
101	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
102	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
103		122
104	static volatile aio_req reqs, reqe; /* queue start, queue end */	123	static void req_destroy (aio_req req);
105	static volatile aio_req ress, rese; /* queue start, queue end */
106
107	static void req_free (aio_req req);	124	static void req_cancel (aio_req req);
		125
		126	static void want_poll (void)
		127	{
		128	/* write a dummy byte to the pipe so fh becomes ready */
		129	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		130	}
		131
		132	static void done_poll (void)
		133	{
		134	/* read any signals sent by the worker threads */
		135	char buf [4];
		136	while (respipe_read (respipe [0], buf, 4) == 4)
		137	;
		138	}
108		139
109	/* must be called at most once */	140	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	141	static SV *req_sv (aio_req req, const char *klass)
111	{	142	{
		143	if (!req->self)
		144	{
112	req->self = (SV *)newHV ();	145	req->self = (SV *)newHV ();
113	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	146	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		147	}
114		148
115	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	149	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
116	}	150	}
117		151
118	static aio_req SvAIO_REQ (SV *sv)	152	static aio_req SvAIO_REQ (SV *sv)
119	{	153	{
		154	MAGIC *mg;
		155
120	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	156	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
121	croak ("object of class " AIO_REQ_KLASS " expected");	157	croak ("object of class " AIO_REQ_KLASS " expected");
122		158
123	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	159	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
124		160
125	return mg ? (aio_req)mg->mg_ptr : 0;	161	return mg ? (aio_req)mg->mg_ptr : 0;
126	}	162	}
127		163
128	static void poll_wait ()	164	static void aio_grp_feed (aio_req grp)
129	{	165	{
130	if (nreqs && !ress)	166	if (grp->sv2 && SvOK (grp->sv2))
131	{	167	{
132	fd_set rfd;	168	dSP;
133	FD_ZERO(&rfd);
134	FD_SET(respipe [0], &rfd);
135		169
136	select (respipe [0] + 1, &rfd, 0, 0, 0);	170	ENTER;
		171	SAVETMPS;
		172	PUSHMARK (SP);
		173	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		174	PUTBACK;
		175	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		176	SPAGAIN;
		177	FREETMPS;
		178	LEAVE;
137	}	179	}
138	}	180	}
139		181
		182	static void req_submit (eio_req *req)
		183	{
		184	eio_submit (req);
		185
		186	if (on_next_submit)
		187	{
		188	dSP;
		189	SV *cb = sv_2mortal (on_next_submit);
		190
		191	on_next_submit = 0;
		192
		193	PUSHMARK (SP);
		194	PUTBACK;
		195	call_sv (cb, G_DISCARD | G_EVAL);
		196	}
		197	}
		198
140	static void req_invoke (aio_req req)	199	static int req_invoke (eio_req *req)
141	{	200	{
142	dSP;	201	dSP;
143	int errorno = errno;
144		202
145	if (req->cancelled || !SvOK (req->callback))	203	if (req->flags & FLAG_SV2_RO_OFF)
146	return;	204	SvREADONLY_off (req->sv2);
147		205
148	errno = req->errorno;	206	if (!EIO_CANCELLED (req) && SvOK (req->callback))
149
150	ENTER;
151	PUSHMARK (SP);
152
153	switch (req->type)
154	{	207	{
155	case REQ_READDIR:	208	ENTER;
		209	SAVETMPS;
		210	PUSHMARK (SP);
		211	EXTEND (SP, 1);
		212
		213	switch (req->type)
156	{	214	{
157	SV *rv = &PL_sv_undef;	215	case EIO_READDIR:
158
159	if (req->result >= 0)
160	{	216	{
161	char *buf = req->data2ptr;	217	SV *rv = &PL_sv_undef;
162	AV *av = newAV ();
163		218
164	while (req->result)	219	if (req->result >= 0)
165	{	220	{
		221	int i;
		222	char *buf = req->ptr2;
		223	AV *av = newAV ();
		224
		225	av_extend (av, req->result - 1);
		226
		227	for (i = 0; i < req->result; ++i)
		228	{
166	SV *sv = newSVpv (buf, 0);	229	SV *sv = newSVpv (buf, 0);
167		230
168	av_push (av, sv);	231	av_store (av, i, sv);
169	buf += SvCUR (sv) + 1;	232	buf += SvCUR (sv) + 1;
170	req->result--;	233	}
		234
		235	rv = sv_2mortal (newRV_noinc ((SV *)av));
171	}	236	}
172		237
173	rv = sv_2mortal (newRV_noinc ((SV *)av));	238	PUSHs (rv);
174	}	239	}
		240	break;
175		241
		242	case EIO_OPEN:
		243	{
		244	/* convert fd to fh */
		245	SV *fh = &PL_sv_undef;
		246
		247	if (req->result >= 0)
		248	{
		249	GV *gv = (GV *)sv_newmortal ();
		250	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		251	char sym [64];
		252	int symlen;
		253
		254	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		255	gv_init (gv, stash, sym, symlen, 0);
		256
		257	symlen = snprintf (
		258	sym,
		259	sizeof (sym),
		260	"%s&=%d",
		261	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		262	req->result
		263	);
		264
		265	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		266	fh = (SV *)gv;
		267	}
		268
176	XPUSHs (rv);	269	PUSHs (fh);
		270	}
		271	break;
		272
		273	case EIO_GROUP:
		274	req->int1 = 2; /* mark group as finished */
		275
		276	if (req->sv1)
		277	{
		278	int i;
		279	AV *av = (AV *)req->sv1;
		280
		281	EXTEND (SP, AvFILL (av) + 1);
		282	for (i = 0; i <= AvFILL (av); ++i)
		283	PUSHs (*av_fetch (av, i, 0));
		284	}
		285	break;
		286
		287	case EIO_NOP:
		288	case EIO_BUSY:
		289	break;
		290
		291	case EIO_READLINK:
		292	if (req->result > 0)
		293	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		294	break;
		295
		296	case EIO_STAT:
		297	case EIO_LSTAT:
		298	case EIO_FSTAT:
		299	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		300	PL_laststatval = req->result;
		301	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		302	PUSHs (sv_2mortal (newSViv (req->result)));
		303	break;
		304
		305	case EIO_READ:
		306	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		307	*SvEND (req->sv2) = 0;
		308	PUSHs (sv_2mortal (newSViv (req->result)));
		309	break;
		310
		311	case EIO_DUP2:
		312	if (req->result > 0)
		313	req->result = 0;
		314	/* FALLTHROUGH */
		315
		316	default:
		317	PUSHs (sv_2mortal (newSViv (req->result)));
		318	break;
177	}	319	}
178	break;
179		320
180	case REQ_OPEN:	321	errno = req->errorno;
181	{
182	/* convert fd to fh */
183	SV *fh;
184		322
185	XPUSHs (sv_2mortal (newSViv (req->result)));
186	PUTBACK;	323	PUTBACK;
187	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	324	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
188	SPAGAIN;	325	SPAGAIN;
189		326
190	fh = SvREFCNT_inc (POPs);	327	FREETMPS;
		328	LEAVE;
191		329
192	PUSHMARK (SP);	330	PUTBACK;
193	XPUSHs (sv_2mortal (fh));
194	}
195	break;
196
197	case REQ_SLEEP:
198	case REQ_GROUP:
199	break;
200
201	default:
202	XPUSHs (sv_2mortal (newSViv (req->result)));
203	break;
204	}	331	}
205		332
206		333	return !!SvTRUE (ERRSV);
207	PUTBACK;
208	call_sv (req->callback, G_VOID | G_EVAL);
209	SPAGAIN;
210
211	if (SvTRUE (ERRSV))
212	{
213	req_free (req);
214	croak (0);
215	}
216
217	LEAVE;
218
219	errno = errorno;
220	}	334	}
221		335
222	static void req_free (aio_req req)	336	static void req_destroy (aio_req req)
223	{	337	{
224	if (req->grp)
225	{
226	aio_req grp = req->grp;
227
228	/* unlink request */
229	req->grp_next->grp_prev = req->grp_prev;
230	req->grp_prev->grp_next = req->grp_next;
231
232	if (grp->grp_next == grp)
233	{
234	req_invoke (grp);
235	req_free (grp);
236	}
237	}
238
239	if (req->self)	338	if (req->self)
240	{	339	{
241	sv_unmagic (req->self, PERL_MAGIC_ext);	340	sv_unmagic (req->self, PERL_MAGIC_ext);
242	SvREFCNT_dec (req->self);	341	SvREFCNT_dec (req->self);
243	}	342	}
244		343
245	if (req->data)
246	SvREFCNT_dec (req->data);
247
248	if (req->fh)
249	SvREFCNT_dec (req->fh);	344	SvREFCNT_dec (req->sv1);
250
251	if (req->fh2)
252	SvREFCNT_dec (req->fh2);	345	SvREFCNT_dec (req->sv2);
253
254	if (req->statdata)
255	Safefree (req->statdata);
256
257	if (req->callback)
258	SvREFCNT_dec (req->callback);	346	SvREFCNT_dec (req->callback);
259
260	if (req->type == REQ_READDIR && req->result >= 0)
261	free (req->data2ptr);
262		347
263	Safefree (req);	348	Safefree (req);
264	}	349	}
265		350
266	static void req_cancel (aio_req req)	351	static void req_cancel_subs (aio_req grp)
267	{	352	{
268	req->cancelled = 1;	353	aio_req sub;
269		354
270	if (req->type == REQ_GROUP)	355	if (grp->type != EIO_GROUP)
		356	return;
		357
		358	SvREFCNT_dec (grp->sv2);
		359	grp->sv2 = 0;
		360
		361	eio_grp_cancel (grp);
		362	}
		363
		364	#ifdef USE_SOCKETS_AS_HANDLES
		365	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		366	#else
		367	# define TO_SOCKET(x) (x)
		368	#endif
		369
		370	static void
		371	create_respipe (void)
		372	{
		373	int old_readfd = respipe [0];
		374
		375	if (respipe [1] >= 0)
		376	respipe_close (TO_SOCKET (respipe [1]));
		377
		378	#ifdef _WIN32
		379	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		380	#else
		381	if (pipe (respipe))
		382	#endif
		383	croak ("unable to initialize result pipe");
		384
		385	if (old_readfd >= 0)
271	{	386	{
272	aio_req sub;	387	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		388	croak ("unable to initialize result pipe(2)");
273		389
274	for (sub = req->grp_next; sub != req; sub = sub->grp_next)	390	respipe_close (respipe [0]);
275	req_cancel (sub);	391	respipe [0] = old_readfd;
276	}	392	}
277	}
278		393
		394	#ifdef _WIN32
		395	int arg = 1;
		396	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		397	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		398	#else
		399	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		400	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		401	#endif
		402	croak ("unable to initialize result pipe(3)");
		403
		404	respipe_osf [0] = TO_SOCKET (respipe [0]);
		405	respipe_osf [1] = TO_SOCKET (respipe [1]);
		406	}
		407
		408	static void poll_wait (void)
		409	{
		410	fd_set rfd;
		411
		412	while (eio_nreqs ())
		413	{
		414	int size;
		415
		416	X_LOCK (reslock);
		417	size = res_queue.size;
		418	X_UNLOCK (reslock);
		419
		420	if (size)
		421	return;
		422
		423	etp_maybe_start_thread ();
		424
		425	FD_ZERO (&rfd);
		426	FD_SET (respipe [0], &rfd);
		427
		428	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		429	}
		430	}
		431
279	static int poll_cb ()	432	static int poll_cb (void)
280	{	433	{
281	dSP;
282	int count = 0;
283	int do_croak = 0;
284	aio_req req;
285
286	for (;;)	434	for (;;)
287	{	435	{
288	pthread_mutex_lock (&reslock);	436	int res = eio_poll ();
289	req = ress;
290		437
291	if (req)	438	if (res > 0)
292	{
293	ress = req->next;
294
295	if (!ress)
296	{
297	/* read any signals sent by the worker threads */
298	char buf [32];
299	while (read (respipe [0], buf, 32) == 32)
300	;
301
302	rese = 0;
303	}
304	}
305
306	pthread_mutex_unlock (&reslock);
307
308	if (!req)
309	break;	439	croak (0);
310		440
311	nreqs--;	441	if (!max_outstanding || max_outstanding > eio_nreqs ())
		442	return res;
312		443
313	if (req->type == REQ_QUIT)	444	poll_wait ();
314	started--;
315	else if (req->type == REQ_GROUP && req->grp_next != req)
316	continue;
317	else
318	{
319	if (req->type == REQ_READ)
320	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
321
322	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
323	SvREADONLY_off (req->data);
324
325	if (req->statdata)
326	{
327	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
328	PL_laststatval = req->result;
329	PL_statcache = *(req->statdata);
330	}
331
332	req_invoke (req);
333
334	count++;
335	}
336
337	req_free (req);
338	}	445	}
339
340	return count;
341	}
342
343	static void *aio_proc(void *arg);
344
345	static void start_thread (void)
346	{
347	sigset_t fullsigset, oldsigset;
348	pthread_t tid;
349	pthread_attr_t attr;
350
351	pthread_attr_init (&attr);
352	pthread_attr_setstacksize (&attr, STACKSIZE);
353	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
354
355	sigfillset (&fullsigset);
356	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
357
358	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
359	started++;
360
361	sigprocmask (SIG_SETMASK, &oldsigset, 0);
362	}
363
364	static void req_send (aio_req req)
365	{
366	while (started < wanted && nreqs >= started)
367	start_thread ();
368
369	nreqs++;
370
371	pthread_mutex_lock (&reqlock);
372
373	req->next = 0;
374
375	if (reqe)
376	{
377	reqe->next = req;
378	reqe = req;
379	}
380	else
381	reqe = reqs = req;
382
383	pthread_cond_signal (&reqwait);
384	pthread_mutex_unlock (&reqlock);
385
386	if (nreqs > max_outstanding)
387	for (;;)
388	{
389	poll_cb ();
390
391	if (nreqs <= max_outstanding)
392	break;
393
394	poll_wait ();
395	}
396	}
397
398	static void end_thread (void)
399	{
400	aio_req req;
401	Newz (0, req, 1, aio_cb);
402	req->type = REQ_QUIT;
403
404	req_send (req);
405	}
406
407	static void min_parallel (int nthreads)
408	{
409	if (wanted < nthreads)
410	wanted = nthreads;
411	}
412
413	static void max_parallel (int nthreads)
414	{
415	int cur = started;
416
417	if (wanted > nthreads)
418	wanted = nthreads;
419
420	while (cur > wanted)
421	{
422	end_thread ();
423	cur--;
424	}
425
426	while (started > wanted)
427	{
428	poll_wait ();
429	poll_cb ();
430	}
431	}
432
433	static void create_pipe ()
434	{
435	if (pipe (respipe))
436	croak ("unable to initialize result pipe");
437
438	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
439	croak ("cannot set result pipe to nonblocking mode");
440
441	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
442	croak ("cannot set result pipe to nonblocking mode");
443	}
444
445	/*****************************************************************************/
446	/* work around various missing functions */
447
448	#if !HAVE_PREADWRITE
449	# define pread aio_pread
450	# define pwrite aio_pwrite
451
452	/*
453	* make our pread/pwrite safe against themselves, but not against
454	* normal read/write by using a mutex. slows down execution a lot,
455	* but that's your problem, not mine.
456	*/
457	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
458
459	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
460	{
461	ssize_t res;
462	off_t ooffset;
463
464	pthread_mutex_lock (&preadwritelock);
465	ooffset = lseek (fd, 0, SEEK_CUR);
466	lseek (fd, offset, SEEK_SET);
467	res = read (fd, buf, count);
468	lseek (fd, ooffset, SEEK_SET);
469	pthread_mutex_unlock (&preadwritelock);
470
471	return res;
472	}
473
474	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
475	{
476	ssize_t res;
477	off_t ooffset;
478
479	pthread_mutex_lock (&preadwritelock);
480	ooffset = lseek (fd, 0, SEEK_CUR);
481	lseek (fd, offset, SEEK_SET);
482	res = write (fd, buf, count);
483	lseek (fd, offset, SEEK_SET);
484	pthread_mutex_unlock (&preadwritelock);
485
486	return res;
487	}
488	#endif
489
490	#if !HAVE_FDATASYNC
491	# define fdatasync fsync
492	#endif
493
494	#if !HAVE_READAHEAD
495	# define readahead aio_readahead
496
497	static ssize_t readahead (int fd, off_t offset, size_t count)
498	{
499	char readahead_buf[4096];
500
501	while (count > 0)
502	{
503	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
504
505	pread (fd, readahead_buf, len, offset);
506	offset += len;
507	count -= len;
508	}
509
510	errno = 0;
511	}
512	#endif
513
514	#if !HAVE_READDIR_R
515	# define readdir_r aio_readdir_r
516
517	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
518
519	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
520	{
521	struct dirent *e;
522	int errorno;
523
524	pthread_mutex_lock (&readdirlock);
525
526	e = readdir (dirp);
527	errorno = errno;
528
529	if (e)
530	{
531	*res = ent;
532	strcpy (ent->d_name, e->d_name);
533	}
534	else
535	*res = 0;
536
537	pthread_mutex_unlock (&readdirlock);
538
539	errno = errorno;
540	return e ? 0 : -1;
541	}
542	#endif
543
544	/* sendfile always needs emulation */
545	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
546	{
547	ssize_t res;
548
549	if (!count)
550	return 0;
551
552	#if HAVE_SENDFILE
553	# if __linux
554	res = sendfile (ofd, ifd, &offset, count);
555
556	# elif __freebsd
557	/*
558	* Of course, the freebsd sendfile is a dire hack with no thoughts
559	* wasted on making it similar to other I/O functions.
560	*/
561	{
562	off_t sbytes;
563	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
564
565	if (res < 0 && sbytes)
566	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
567	res = sbytes;
568	}
569
570	# elif __hpux
571	res = sendfile (ofd, ifd, offset, count, 0, 0);
572
573	# elif __solaris
574	{
575	struct sendfilevec vec;
576	size_t sbytes;
577
578	vec.sfv_fd = ifd;
579	vec.sfv_flag = 0;
580	vec.sfv_off = offset;
581	vec.sfv_len = count;
582
583	res = sendfilev (ofd, &vec, 1, &sbytes);
584
585	if (res < 0 && sbytes)
586	res = sbytes;
587	}
588
589	# endif
590	#else
591	res = -1;
592	errno = ENOSYS;
593	#endif
594
595	if (res < 0
596	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
597	#if __solaris
598	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
599	#endif
600	)
601	)
602	{
603	/* emulate sendfile. this is a major pain in the ass */
604	char buf[4096];
605	res = 0;
606
607	while (count)
608	{
609	ssize_t cnt;
610
611	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
612
613	if (cnt <= 0)
614	{
615	if (cnt && !res) res = -1;
616	break;
617	}
618
619	cnt = write (ofd, buf, cnt);
620
621	if (cnt <= 0)
622	{
623	if (cnt && !res) res = -1;
624	break;
625	}
626
627	offset += cnt;
628	res += cnt;
629	count -= cnt;
630	}
631	}
632
633	return res;
634	}
635
636	/* read a full directory */
637	static int scandir_ (const char *path, void **namesp)
638	{
639	DIR *dirp = opendir (path);
640	union
641	{
642	struct dirent d;
643	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
644	} u;
645	struct dirent *entp;
646	char *name, *names;
647	int memlen = 4096;
648	int memofs = 0;
649	int res = 0;
650	int errorno;
651
652	if (!dirp)
653	return -1;
654
655	names = malloc (memlen);
656
657	for (;;)
658	{
659	errno = 0, readdir_r (dirp, &u.d, &entp);
660
661	if (!entp)
662	break;
663
664	name = entp->d_name;
665
666	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
667	{
668	int len = strlen (name) + 1;
669
670	res++;
671
672	while (memofs + len > memlen)
673	{
674	memlen *= 2;
675	names = realloc (names, memlen);
676	if (!names)
677	break;
678	}
679
680	memcpy (names + memofs, name, len);
681	memofs += len;
682	}
683	}
684
685	errorno = errno;
686	closedir (dirp);
687
688	if (errorno)
689	{
690	free (names);
691	errno = errorno;
692	res = -1;
693	}
694
695	*namesp = (void *)names;
696	return res;
697	}
698
699	/*****************************************************************************/
700
701	static void *aio_proc (void *thr_arg)
702	{
703	aio_req req;
704	int type;
705
706	do
707	{
708	pthread_mutex_lock (&reqlock);
709
710	for (;;)
711	{
712	req = reqs;
713
714	if (reqs)
715	{
716	reqs = reqs->next;
717	if (!reqs) reqe = 0;
718	}
719
720	if (req)
721	break;
722
723	pthread_cond_wait (&reqwait, &reqlock);
724	}
725
726	pthread_mutex_unlock (&reqlock);
727
728	errno = 0; /* strictly unnecessary */
729
730	if (!req->cancelled)
731	switch (req->type)
732	{
733	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
734	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
735
736	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
737	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
738
739	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
740	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
741	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
742
743	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
744	case REQ_CLOSE: req->result = close (req->fd); break;
745	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
746	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
747	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
748	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
749	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
750
751	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
752	case REQ_FSYNC: req->result = fsync (req->fd); break;
753	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
754
755	case REQ_SLEEP:
756	{
757	struct timeval tv;
758
759	tv.tv_sec = req->fd;
760	tv.tv_usec = req->fd2;
761
762	req->result = select (0, 0, 0, 0, &tv);
763	}
764
765	case REQ_QUIT:
766	break;
767
768	default:
769	req->result = ENOSYS;
770	break;
771	}
772
773	req->errorno = errno;
774
775	pthread_mutex_lock (&reslock);
776
777	req->next = 0;
778
779	if (rese)
780	{
781	rese->next = req;
782	rese = req;
783	}
784	else
785	{
786	rese = ress = req;
787
788	/* write a dummy byte to the pipe so fh becomes ready */
789	write (respipe [1], &respipe, 1);
790	}
791
792	pthread_mutex_unlock (&reslock);
793	}
794	while (type != REQ_QUIT);
795
796	return 0;
797	}
798
799	/*****************************************************************************/
800
801	static void atfork_prepare (void)
802	{
803	pthread_mutex_lock (&reqlock);
804	pthread_mutex_lock (&reslock);
805	#if !HAVE_PREADWRITE
806	pthread_mutex_lock (&preadwritelock);
807	#endif
808	#if !HAVE_READDIR_R
809	pthread_mutex_lock (&readdirlock);
810	#endif
811	}
812
813	static void atfork_parent (void)
814	{
815	#if !HAVE_READDIR_R
816	pthread_mutex_unlock (&readdirlock);
817	#endif
818	#if !HAVE_PREADWRITE
819	pthread_mutex_unlock (&preadwritelock);
820	#endif
821	pthread_mutex_unlock (&reslock);
822	pthread_mutex_unlock (&reqlock);
823	}	446	}
824		447
825	static void atfork_child (void)	448	static void atfork_child (void)
826	{	449	{
827	aio_req prv;
828
829	started = 0;
830
831	while (reqs)
832	{
833	prv = reqs;
834	reqs = prv->next;
835	req_free (prv);
836	}
837
838	reqs = reqe = 0;
839
840	while (ress)
841	{
842	prv = ress;
843	ress = prv->next;
844	req_free (prv);
845	}
846
847	ress = rese = 0;
848
849	close (respipe [0]);
850	close (respipe [1]);
851	create_pipe ();	450	create_respipe ();
852
853	atfork_parent ();
854	}	451	}
855		452
856	#define dREQ \	453	#define dREQ \
857	aio_req req; \	454	aio_req req; \
		455	int req_pri = next_pri; \
		456	next_pri = EIO_PRI_DEFAULT; \
858	\	457	\
859	if (SvOK (callback) && !SvROK (callback)) \	458	if (SvOK (callback) && !SvROK (callback)) \
860	croak ("callback must be undef or of reference type"); \	459	croak ("callback must be undef or of reference type"); \
861	\	460	\
862	Newz (0, req, 1, aio_cb); \	461	Newz (0, req, 1, eio_req); \
863	if (!req) \	462	if (!req) \
864	croak ("out of memory during aio_req allocation"); \	463	croak ("out of memory during eio_req allocation"); \
865	\	464	\
866	req->callback = newSVsv (callback)	465	req->callback = newSVsv (callback); \
		466	req->pri = req_pri
867		467
868	#define REQ_SEND \	468	#define REQ_SEND \
		469	PUTBACK; \
869	req_send (req); \	470	req_submit (req); \
		471	SPAGAIN; \
870	\	472	\
871	if (GIMME_V != G_VOID) \	473	if (GIMME_V != G_VOID) \
872	XPUSHs (req_sv (req, AIO_REQ_KLASS));	474	XPUSHs (req_sv (req, AIO_REQ_KLASS));
873		475
874	MODULE = IO::AIO PACKAGE = IO::AIO	476	MODULE = IO::AIO PACKAGE = IO::AIO
875		477
876	PROTOTYPES: ENABLE	478	PROTOTYPES: ENABLE
877		479
878	BOOT:	480	BOOT:
879	{	481	{
880	HV *stash = gv_stashpv ("IO::AIO", 1);	482	stash = gv_stashpv ("IO::AIO", 1);
		483
881	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	484	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
882	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	485	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
883	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	486	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		487	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		488	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		489	#ifndef _WIN32
		490	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		491	#endif
884		492
885	create_pipe ();	493	create_respipe ();
886	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
887	}
888		494
		495	if (eio_init (want_poll, done_poll) < 0)
		496	croak ("IO::AIO: unable to initialise eio library");
		497
		498	/* atfork child called in fifo order, so before eio's handler */
		499	X_THREAD_ATFORK (0, 0, atfork_child);
		500	}
		501
889	void	502	void
890	min_parallel (nthreads)	503	max_poll_reqs (int nreqs)
891	int nthreads
892	PROTOTYPE: $	504	PROTOTYPE: $
		505	CODE:
		506	eio_set_max_poll_reqs (nreqs);
893		507
894	void	508	void
895	max_parallel (nthreads)	509	max_poll_time (double nseconds)
896	int nthreads
897	PROTOTYPE: $	510	PROTOTYPE: $
898
899	int
900	max_outstanding (nreqs)
901	int nreqs
902	PROTOTYPE: $
903	CODE:	511	CODE:
904	RETVAL = max_outstanding;	512	eio_set_max_poll_time (nseconds);
		513
		514	void
		515	min_parallel (int nthreads)
		516	PROTOTYPE: $
		517	CODE:
		518	eio_set_min_parallel (nthreads);
		519
		520	void
		521	max_parallel (int nthreads)
		522	PROTOTYPE: $
		523	CODE:
		524	eio_set_max_parallel (nthreads);
		525
		526	void
		527	max_idle (int nthreads)
		528	PROTOTYPE: $
		529	CODE:
		530	eio_set_max_idle (nthreads);
		531
		532	void
		533	max_outstanding (int maxreqs)
		534	PROTOTYPE: $
		535	CODE:
905	max_outstanding = nreqs;	536	max_outstanding = maxreqs;
906		537
907	void	538	void
908	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	539	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
909	SV * pathname
910	int flags
911	int mode
912	SV * callback
913	PROTOTYPE: $$$;$	540	PROTOTYPE: $$$;$
914	PPCODE:	541	PPCODE:
915	{	542	{
916	dREQ;	543	dREQ;
917		544
918	req->type = REQ_OPEN;	545	req->type = EIO_OPEN;
919	req->data = newSVsv (pathname);	546	req->sv1 = newSVsv (pathname);
920	req->dataptr = SvPVbyte_nolen (req->data);	547	req->ptr1 = SvPVbyte_nolen (req->sv1);
921	req->fd = flags;	548	req->int1 = flags;
922	req->mode = mode;	549	req->int2 = mode;
923		550
924	REQ_SEND;	551	REQ_SEND;
925	}	552	}
926		553
927	void	554	void
928	aio_close (fh,callback=&PL_sv_undef)	555	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
929	SV * fh
930	SV * callback
931	PROTOTYPE: $;$	556	PROTOTYPE: $;$
932	ALIAS:	557	ALIAS:
933	aio_close = REQ_CLOSE
934	aio_fsync = REQ_FSYNC	558	aio_fsync = EIO_FSYNC
935	aio_fdatasync = REQ_FDATASYNC	559	aio_fdatasync = EIO_FDATASYNC
936	PPCODE:	560	PPCODE:
937	{	561	{
938	dREQ;	562	dREQ;
939		563
940	req->type = ix;	564	req->type = ix;
941	req->fh = newSVsv (fh);	565	req->sv1 = newSVsv (fh);
942	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	566	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
943		567
944	REQ_SEND (req);	568	REQ_SEND (req);
945	}	569	}
946		570
947	void	571	void
		572	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		573	PROTOTYPE: $;$
		574	PPCODE:
		575	{
		576	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		577	dREQ;
		578
		579	if (close_pipe < 0)
		580	{
		581	int pipefd [2];
		582
		583	if (pipe (pipefd) < 0
		584	|| close (pipefd [1]) < 0
		585	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		586	abort (); /*D*/
		587
		588	close_pipe = pipefd [0];
		589	}
		590
		591	req->type = EIO_DUP2;
		592	req->int1 = close_pipe;
		593	req->sv2 = newSVsv (fh);
		594	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		595
		596	REQ_SEND (req);
		597	}
		598
		599	void
948	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	600	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
949	SV * fh
950	UV offset
951	UV length
952	SV * data
953	UV dataoffset
954	SV * callback
955	ALIAS:	601	ALIAS:
956	aio_read = REQ_READ	602	aio_read = EIO_READ
957	aio_write = REQ_WRITE	603	aio_write = EIO_WRITE
958	PROTOTYPE: $$$$$;$	604	PROTOTYPE: $$$$$;$
959	PPCODE:	605	PPCODE:
960	{	606	{
961	aio_req req;
962	STRLEN svlen;	607	STRLEN svlen;
963	char *svptr = SvPVbyte (data, svlen);	608	char *svptr = SvPVbyte (data, svlen);
		609	UV len = SvUV (length);
964		610
965	SvUPGRADE (data, SVt_PV);	611	SvUPGRADE (data, SVt_PV);
966	SvPOK_on (data);	612	SvPOK_on (data);
967		613
968	if (dataoffset < 0)	614	if (dataoffset < 0)
969	dataoffset += svlen;	615	dataoffset += svlen;
970		616
971	if (dataoffset < 0 || dataoffset > svlen)	617	if (dataoffset < 0 || dataoffset > svlen)
972	croak ("data offset outside of string");	618	croak ("dataoffset outside of data scalar");
973		619
974	if (ix == REQ_WRITE)	620	if (ix == EIO_WRITE)
975	{	621	{
976	/* write: check length and adjust. */	622	/* write: check length and adjust. */
977	if (length < 0 || length + dataoffset > svlen)	623	if (!SvOK (length) || len + dataoffset > svlen)
978	length = svlen - dataoffset;	624	len = svlen - dataoffset;
979	}	625	}
980	else	626	else
981	{	627	{
982	/* read: grow scalar as necessary */	628	/* read: grow scalar as necessary */
983	svptr = SvGROW (data, length + dataoffset);	629	svptr = SvGROW (data, len + dataoffset + 1);
984	}	630	}
985		631
986	if (length < 0)	632	if (len < 0)
987	croak ("length must not be negative");	633	croak ("length must not be negative");
988		634
989	{	635	{
990	dREQ;	636	dREQ;
991		637
992	req->type = ix;	638	req->type = ix;
993	req->fh = newSVsv (fh);	639	req->sv1 = newSVsv (fh);
994	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	640	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
995	: IoOFP (sv_2io (fh)));	641	: IoOFP (sv_2io (fh)));
		642	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
996	req->offset = offset;	643	req->size = len;
997	req->length = length;
998	req->data = SvREFCNT_inc (data);	644	req->sv2 = SvREFCNT_inc (data);
999	req->dataptr = (char *)svptr + dataoffset;	645	req->ptr2 = (char *)svptr + dataoffset;
		646	req->stroffset = dataoffset;
1000		647
1001	if (!SvREADONLY (data))	648	if (!SvREADONLY (data))
1002	{	649	{
1003	SvREADONLY_on (data);	650	SvREADONLY_on (data);
1004	req->data2ptr = (void *)data;	651	req->flags |= FLAG_SV2_RO_OFF;
1005	}	652	}
1006		653
1007	REQ_SEND;	654	REQ_SEND;
1008	}	655	}
1009	}	656	}
1010		657
1011	void	658	void
		659	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		660	PROTOTYPE: $$;$
		661	PPCODE:
		662	{
		663	SV *data;
		664	dREQ;
		665
		666	req->type = EIO_READLINK;
		667	req->sv1 = newSVsv (path);
		668	req->ptr1 = SvPVbyte_nolen (req->sv1);
		669
		670	REQ_SEND;
		671	}
		672
		673	void
1012	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	674	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1013	SV * out_fh
1014	SV * in_fh
1015	UV in_offset
1016	UV length
1017	SV * callback
1018	PROTOTYPE: $$$$;$	675	PROTOTYPE: $$$$;$
1019	PPCODE:	676	PPCODE:
1020	{	677	{
1021	dREQ;	678	dREQ;
1022		679
1023	req->type = REQ_SENDFILE;	680	req->type = EIO_SENDFILE;
1024	req->fh = newSVsv (out_fh);	681	req->sv1 = newSVsv (out_fh);
1025	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	682	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1026	req->fh2 = newSVsv (in_fh);	683	req->sv2 = newSVsv (in_fh);
1027	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	684	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1028	req->offset = in_offset;	685	req->offs = SvVAL64 (in_offset);
1029	req->length = length;	686	req->size = length;
1030		687
1031	REQ_SEND;	688	REQ_SEND;
1032	}	689	}
1033		690
1034	void	691	void
1035	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	692	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1036	SV * fh
1037	UV offset
1038	IV length
1039	SV * callback
1040	PROTOTYPE: $$$;$	693	PROTOTYPE: $$$;$
1041	PPCODE:	694	PPCODE:
1042	{	695	{
1043	dREQ;	696	dREQ;
1044		697
1045	req->type = REQ_READAHEAD;	698	req->type = EIO_READAHEAD;
1046	req->fh = newSVsv (fh);	699	req->sv1 = newSVsv (fh);
1047	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	700	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1048	req->offset = offset;	701	req->offs = SvVAL64 (offset);
1049	req->length = length;	702	req->size = length;
1050		703
1051	REQ_SEND;	704	REQ_SEND;
1052	}	705	}
1053		706
1054	void	707	void
1055	aio_stat (fh_or_path,callback=&PL_sv_undef)	708	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1056	SV * fh_or_path
1057	SV * callback
1058	ALIAS:	709	ALIAS:
1059	aio_stat = REQ_STAT	710	aio_stat = EIO_STAT
1060	aio_lstat = REQ_LSTAT	711	aio_lstat = EIO_LSTAT
1061	PPCODE:	712	PPCODE:
1062	{	713	{
1063	dREQ;	714	dREQ;
1064		715
1065	New (0, req->statdata, 1, Stat_t);	716	req->sv1 = newSVsv (fh_or_path);
1066	if (!req->statdata)
1067	{
1068	req_free (req);
1069	croak ("out of memory during aio_req->statdata allocation");
1070	}
1071		717
1072	if (SvPOK (fh_or_path))	718	if (SvPOK (req->sv1))
1073	{	719	{
1074	req->type = ix;	720	req->type = ix;
1075	req->data = newSVsv (fh_or_path);
1076	req->dataptr = SvPVbyte_nolen (req->data);	721	req->ptr1 = SvPVbyte_nolen (req->sv1);
1077	}	722	}
1078	else	723	else
1079	{	724	{
1080	req->type = REQ_FSTAT;	725	req->type = EIO_FSTAT;
1081	req->fh = newSVsv (fh_or_path);
1082	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	726	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1083	}	727	}
1084		728
1085	REQ_SEND;	729	REQ_SEND;
1086	}	730	}
1087		731
1088	void	732	void
		733	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		734	PPCODE:
		735	{
		736	dREQ;
		737
		738	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		739	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		740	req->sv1 = newSVsv (fh_or_path);
		741
		742	if (SvPOK (req->sv1))
		743	{
		744	req->type = EIO_UTIME;
		745	req->ptr1 = SvPVbyte_nolen (req->sv1);
		746	}
		747	else
		748	{
		749	req->type = EIO_FUTIME;
		750	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		751	}
		752
		753	REQ_SEND;
		754	}
		755
		756	void
		757	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		758	PPCODE:
		759	{
		760	dREQ;
		761
		762	req->sv1 = newSVsv (fh_or_path);
		763	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		764
		765	if (SvPOK (req->sv1))
		766	{
		767	req->type = EIO_TRUNCATE;
		768	req->ptr1 = SvPVbyte_nolen (req->sv1);
		769	}
		770	else
		771	{
		772	req->type = EIO_FTRUNCATE;
		773	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		774	}
		775
		776	REQ_SEND;
		777	}
		778
		779	void
		780	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		781	ALIAS:
		782	aio_chmod = EIO_CHMOD
		783	aio_mkdir = EIO_MKDIR
		784	PPCODE:
		785	{
		786	dREQ;
		787
		788	req->int2 = mode;
		789	req->sv1 = newSVsv (fh_or_path);
		790
		791	if (SvPOK (req->sv1))
		792	{
		793	req->type = ix;
		794	req->ptr1 = SvPVbyte_nolen (req->sv1);
		795	}
		796	else
		797	{
		798	req->type = EIO_FCHMOD;
		799	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		800	}
		801
		802	REQ_SEND;
		803	}
		804
		805	void
		806	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		807	PPCODE:
		808	{
		809	dREQ;
		810
		811	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		812	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		813	req->sv1 = newSVsv (fh_or_path);
		814
		815	if (SvPOK (req->sv1))
		816	{
		817	req->type = EIO_CHOWN;
		818	req->ptr1 = SvPVbyte_nolen (req->sv1);
		819	}
		820	else
		821	{
		822	req->type = EIO_FCHOWN;
		823	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		824	}
		825
		826	REQ_SEND;
		827	}
		828
		829	void
1089	aio_unlink (pathname,callback=&PL_sv_undef)	830	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1090	SV * pathname
1091	SV * callback
1092	ALIAS:	831	ALIAS:
1093	aio_unlink = REQ_UNLINK	832	aio_unlink = EIO_UNLINK
1094	aio_rmdir = REQ_RMDIR	833	aio_rmdir = EIO_RMDIR
1095	aio_readdir = REQ_READDIR	834	aio_readdir = EIO_READDIR
1096	PPCODE:	835	PPCODE:
1097	{	836	{
1098	dREQ;	837	dREQ;
1099		838
1100	req->type = ix;	839	req->type = ix;
1101	req->data = newSVsv (pathname);	840	req->sv1 = newSVsv (pathname);
1102	req->dataptr = SvPVbyte_nolen (req->data);	841	req->ptr1 = SvPVbyte_nolen (req->sv1);
		842
		843	REQ_SEND;
		844	}
		845
		846	void
		847	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		848	ALIAS:
		849	aio_link = EIO_LINK
		850	aio_symlink = EIO_SYMLINK
		851	aio_rename = EIO_RENAME
		852	PPCODE:
		853	{
		854	dREQ;
		855
		856	req->type = ix;
		857	req->sv1 = newSVsv (oldpath);
		858	req->ptr1 = SvPVbyte_nolen (req->sv1);
		859	req->sv2 = newSVsv (newpath);
		860	req->ptr2 = SvPVbyte_nolen (req->sv2);
1103		861
1104	REQ_SEND;	862	REQ_SEND;
1105	}	863	}
1106		864
1107	void	865	void
1108	aio_link (oldpath,newpath,callback=&PL_sv_undef)	866	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1109	SV * oldpath
1110	SV * newpath
1111	SV * callback
1112	ALIAS:
1113	aio_link = REQ_LINK
1114	aio_symlink = REQ_SYMLINK
1115	aio_rename = REQ_RENAME
1116	PPCODE:	867	PPCODE:
1117	{	868	{
1118	dREQ;	869	dREQ;
1119		870
1120	req->type = ix;	871	req->type = EIO_MKNOD;
1121	req->fh = newSVsv (oldpath);	872	req->sv1 = newSVsv (pathname);
1122	req->data2ptr = SvPVbyte_nolen (req->fh);	873	req->ptr1 = SvPVbyte_nolen (req->sv1);
1123	req->data = newSVsv (newpath);	874	req->int2 = (mode_t)mode;
1124	req->dataptr = SvPVbyte_nolen (req->data);	875	req->offs = dev;
1125		876
1126	REQ_SEND;	877	REQ_SEND;
1127	}	878	}
1128		879
1129	void	880	void
1130	aio_sleep (delay,callback=&PL_sv_undef)	881	aio_busy (double delay, SV *callback=&PL_sv_undef)
1131	double delay
1132	SV * callback
1133	PPCODE:	882	PPCODE:
1134	{	883	{
1135	dREQ;	884	dREQ;
1136		885
1137	req->type = REQ_SLEEP;	886	req->type = EIO_BUSY;
1138	req->fd = delay < 0. ? 0 : delay;	887	req->nv1 = delay < 0. ? 0. : delay;
1139	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1140		888
1141	REQ_SEND;	889	REQ_SEND;
1142	}	890	}
1143		891
1144	void	892	void
1145	aio_group (callback=&PL_sv_undef)	893	aio_group (SV *callback=&PL_sv_undef)
1146	SV * callback
1147	PROTOTYPE: ;&	894	PROTOTYPE: ;$
1148	PPCODE:	895	PPCODE:
1149	{	896	{
1150	dREQ;	897	dREQ;
		898
1151	req->type = REQ_GROUP;	899	req->type = EIO_GROUP;
1152	req->grp_next = req;
1153	req->grp_prev = req;
1154		900
1155	req_send (req);	901	eio_submit (req);
1156	XPUSHs (req_sv (req, AIO_GRP_KLASS));	902	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1157	}	903	}
		904
		905	void
		906	aio_nop (SV *callback=&PL_sv_undef)
		907	ALIAS:
		908	aio_nop = EIO_NOP
		909	aio_sync = EIO_SYNC
		910	PPCODE:
		911	{
		912	dREQ;
		913
		914	req->type = ix;
		915
		916	REQ_SEND;
		917	}
		918
		919	int
		920	aioreq_pri (int pri = 0)
		921	PROTOTYPE: ;$
		922	CODE:
		923	RETVAL = next_pri;
		924	if (items > 0)
		925	{
		926	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		927	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		928	next_pri = pri;
		929	}
		930	OUTPUT:
		931	RETVAL
		932
		933	void
		934	aioreq_nice (int nice = 0)
		935	CODE:
		936	nice = next_pri - nice;
		937	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		938	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		939	next_pri = nice;
1158		940
1159	void	941	void
1160	flush ()	942	flush ()
1161	PROTOTYPE:	943	PROTOTYPE:
1162	CODE:	944	CODE:
1163	while (nreqs)	945	while (eio_nreqs ())
1164	{	946	{
1165	poll_wait ();	947	poll_wait ();
1166	poll_cb ();	948	poll_cb ();
1167	}	949	}
1168		950
1169	void	951	int
1170	poll()	952	poll()
1171	PROTOTYPE:	953	PROTOTYPE:
1172	CODE:	954	CODE:
1173	if (nreqs)
1174	{
1175	poll_wait ();	955	poll_wait ();
1176	poll_cb ();	956	RETVAL = poll_cb ();
1177	}	957	OUTPUT:
		958	RETVAL
1178		959
1179	int	960	int
1180	poll_fileno()	961	poll_fileno()
1181	PROTOTYPE:	962	PROTOTYPE:
1182	CODE:	963	CODE:
…		…
1194		975
1195	void	976	void
1196	poll_wait()	977	poll_wait()
1197	PROTOTYPE:	978	PROTOTYPE:
1198	CODE:	979	CODE:
1199	if (nreqs)
1200	poll_wait ();	980	poll_wait ();
1201		981
1202	int	982	int
1203	nreqs()	983	nreqs()
1204	PROTOTYPE:	984	PROTOTYPE:
1205	CODE:	985	CODE:
1206	RETVAL = nreqs;	986	RETVAL = eio_nreqs ();
1207	OUTPUT:	987	OUTPUT:
1208	RETVAL	988	RETVAL
1209		989
		990	int
		991	nready()
		992	PROTOTYPE:
		993	CODE:
		994	RETVAL = eio_nready ();
		995	OUTPUT:
		996	RETVAL
		997
		998	int
		999	npending()
		1000	PROTOTYPE:
		1001	CODE:
		1002	RETVAL = eio_npending ();
		1003	OUTPUT:
		1004	RETVAL
		1005
		1006	int
		1007	nthreads()
		1008	PROTOTYPE:
		1009	CODE:
		1010	RETVAL = eio_nthreads ();
		1011	OUTPUT:
		1012	RETVAL
		1013
		1014	void _on_next_submit (SV *cb)
		1015	CODE:
		1016	SvREFCNT_dec (on_next_submit);
		1017	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1018
		1019	PROTOTYPES: DISABLE
		1020
1210	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1021	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1211		1022
1212	void	1023	void
1213	cancel (aio_req_ornot req)	1024	cancel (aio_req_ornot req)
1214	PROTOTYPE:
1215	CODE:	1025	CODE:
1216	req_cancel (req);	1026	eio_cancel (req);
		1027
		1028	void
		1029	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1030	CODE:
		1031	SvREFCNT_dec (req->callback);
		1032	req->callback = newSVsv (callback);
1217		1033
1218	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1034	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1219		1035
1220	void	1036	void
1221	add (aio_req grp, ...)	1037	add (aio_req grp, ...)
1222	PROTOTYPE: $;@
1223	PPCODE:	1038	PPCODE:
1224	{	1039	{
1225	int i;	1040	int i;
1226		1041
		1042	if (grp->int1 == 2)
		1043	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1044
1227	for (i = 1; i < items; ++i )	1045	for (i = 1; i < items; ++i )
1228	{	1046	{
1229	aio_req req = SvAIO_REQ (ST (i));	1047	aio_req req;
1230
1231	req->grp_prev = grp;
1232	req->grp_next = grp->grp_next;
1233	grp->grp_next->grp_prev = req;
1234	grp->grp_next = req;
1235
1236	req->grp = grp;
1237		1048
1238	if (GIMME_V != G_VOID)	1049	if (GIMME_V != G_VOID)
1239	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1050	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1240	}
1241	}
1242		1051
		1052	req = SvAIO_REQ (ST (i));
		1053
		1054	if (req)
		1055	eio_grp_add (grp, req);
		1056	}
		1057	}
		1058
		1059	void
		1060	cancel_subs (aio_req_ornot req)
		1061	CODE:
		1062	req_cancel_subs (req);
		1063
		1064	void
		1065	result (aio_req grp, ...)
		1066	CODE:
		1067	{
		1068	int i;
		1069	AV *av;
		1070
		1071	grp->errorno = errno;
		1072
		1073	av = newAV ();
		1074
		1075	for (i = 1; i < items; ++i )
		1076	av_push (av, newSVsv (ST (i)));
		1077
		1078	SvREFCNT_dec (grp->sv1);
		1079	grp->sv1 = (SV *)av;
		1080	}
		1081
		1082	void
		1083	errno (aio_req grp, int errorno = errno)
		1084	CODE:
		1085	grp->errorno = errorno;
		1086
		1087	void
		1088	limit (aio_req grp, int limit)
		1089	CODE:
		1090	eio_grp_limit (grp, limit);
		1091
		1092	void
		1093	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1094	CODE:
		1095	{
		1096	SvREFCNT_dec (grp->sv2);
		1097	grp->sv2 = newSVsv (callback);
		1098
		1099	if (grp->int2 <= 0)
		1100	grp->int2 = 2;
		1101
		1102	eio_grp_limit (grp, grp->int2);
		1103	}
		1104

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