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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.44 by root, Sat Oct 21 23:20:29 2006 UTC vs.
Revision 1.140 by root, Wed Jun 3 12:24:49 2009 UTC

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

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