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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.39 by root, Mon Feb 6 23:54:12 2006 UTC vs.
Revision 1.135 by root, Sun Apr 19 13:06:15 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>
		11	#include <errno.h>
13	#include <sys/types.h>	12	#include <sys/types.h>
14	#include <sys/stat.h>	13	#include <sys/stat.h>
15	#include <limits.h>	14	#include <limits.h>
16	#include <unistd.h>
17	#include <fcntl.h>	15	#include <fcntl.h>
18	#include <signal.h>
19	#include <sched.h>	16	#include <sched.h>
20		17
21	#if HAVE_SENDFILE	18	/* perl namespace pollution */
22	# if __linux	19	#undef VERSION
23	# include <sys/sendfile.h>	20
24	# elif __freebsd	21	#ifdef _WIN32
25	# include <sys/socket.h>	22
26	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
27	# elif __hpux	24	# undef malloc
28	# include <sys/socket.h>	25	# undef free
29	# elif __solaris /* not yet */	26
30	# 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
31	# else	59	#else
32	# error sendfile support requested but not available	60
33	# 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
34	#endif	68	#endif
35		69
36	/* used for struct dirent, AIX doesn't provide it */	70	/* perl stupidly overrides readdir and maybe others */
37	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
38	# 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
39	#endif	83	#endif
40		84
41	#if __ia64	85	/*****************************************************************************/
42	# define STACKSIZE 65536	86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
43	#else	89	#else
44	# define STACKSIZE 8192	90	# define expect(expr,value) (expr)
45	#endif	91	#endif
46		92
		93	#define expect_false(expr) expect ((expr) != 0, 0)
		94	#define expect_true(expr) expect ((expr) != 0, 1)
		95
		96	/*****************************************************************************/
		97
		98	static HV *stash;
		99	typedef SV SV8; /* byte-sv, used for argument-checking */
		100
		101	#define AIO_REQ_KLASS "IO::AIO::REQ"
		102	#define AIO_GRP_KLASS "IO::AIO::GRP"
		103
		104	#define EIO_REQ_MEMBERS \
		105	SV *callback; \
		106	SV *sv1, *sv2; \
		107	STRLEN stroffset; \
		108	SV *self;
		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
47	enum {	119	enum {
48	REQ_QUIT,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
49	REQ_OPEN, REQ_CLOSE,
50	REQ_READ, REQ_WRITE, REQ_READAHEAD,
51	REQ_SENDFILE,
52	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
53	REQ_FSYNC, REQ_FDATASYNC,
54	REQ_UNLINK, REQ_RMDIR,
55	REQ_READDIR,
56	REQ_SYMLINK,
57	};	121	};
58		122
59	typedef struct aio_cb {	123	#include "libeio/eio.c"
60	struct aio_cb *volatile next;
61		124
62	int type;
63
64	/* should receive a cleanup, with unions */
65	int fd, fd2;
66	off_t offset;
67	size_t length;
68	ssize_t result;
69	mode_t mode; /* open */
70	int errorno;
71	SV *data, *callback;
72	SV *fh, *fh2;
73	void *dataptr, *data2ptr;
74	STRLEN dataoffset;
75
76	Stat_t *statdata;
77	} aio_cb;
78
79	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
		126	typedef eio_req *aio_req_ornot;
80		127
81	static int started, wanted;	128	static SV *on_next_submit;
82	static volatile int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
83	static int max_outstanding = 1<<30;	130	static int max_outstanding;
84	static int respipe [2];
85		131
86	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
87	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
88	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
89		133
90	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
91	static volatile aio_req ress, rese; /* queue start, queue end */
92
93	static void free_req (aio_req req)	135	static void req_cancel (aio_req req);
94	{
95	if (req->data)
96	SvREFCNT_dec (req->data);
97		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	}
		150
		151	/* must be called at most once */
		152	static SV *req_sv (aio_req req, const char *klass)
		153	{
		154	if (!req->self)
		155	{
		156	req->self = (SV *)newHV ();
		157	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		158	}
		159
		160	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		161	}
		162
		163	static aio_req SvAIO_REQ (SV *sv)
		164	{
		165	MAGIC *mg;
		166
		167	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		168	croak ("object of class " AIO_REQ_KLASS " expected");
		169
		170	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		171
		172	return mg ? (aio_req)mg->mg_ptr : 0;
		173	}
		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	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		318	*SvEND (req->sv2) = 0;
		319	PUSHs (sv_2mortal (newSViv (req->result)));
		320	break;
		321
		322	case EIO_DUP2:
		323	if (req->result > 0)
		324	req->result = 0;
		325	/* FALLTHROUGH */
		326
		327	default:
		328	PUSHs (sv_2mortal (newSViv (req->result)));
		329	break;
		330	}
		331
		332	errno = req->errorno;
		333
		334	PUTBACK;
		335	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		336	SPAGAIN;
		337
		338	FREETMPS;
		339	LEAVE;
		340
		341	PUTBACK;
		342	}
		343
		344	return !!SvTRUE (ERRSV);
		345	}
		346
		347	static void req_destroy (aio_req req)
		348	{
98	if (req->fh)	349	if (req->self)
		350	{
		351	sv_unmagic (req->self, PERL_MAGIC_ext);
99	SvREFCNT_dec (req->fh);	352	SvREFCNT_dec (req->self);
		353	}
100		354
101	if (req->fh2)	355	SvREFCNT_dec (req->sv1);
102	SvREFCNT_dec (req->fh2);	356	SvREFCNT_dec (req->sv2);
103
104	if (req->statdata)
105	Safefree (req->statdata);
106
107	if (req->callback)
108	SvREFCNT_dec (req->callback);	357	SvREFCNT_dec (req->callback);
109
110	if (req->type == REQ_READDIR && req->result >= 0)
111	free (req->data2ptr);
112		358
113	Safefree (req);	359	Safefree (req);
114	}	360	}
115		361
		362	static void req_cancel_subs (aio_req grp)
		363	{
		364	aio_req sub;
		365
		366	if (grp->type != EIO_GROUP)
		367	return;
		368
		369	SvREFCNT_dec (grp->sv2);
		370	grp->sv2 = 0;
		371
		372	eio_grp_cancel (grp);
		373	}
		374
		375	#ifdef USE_SOCKETS_AS_HANDLES
		376	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		377	#else
		378	# define TO_SOCKET(x) (x)
		379	#endif
		380
116	static void	381	static void
117	poll_wait ()	382	create_respipe (void)
118	{	383	{
119	if (nreqs && !ress)	384	int old_readfd = respipe [0];
		385
		386	if (respipe [1] >= 0)
		387	respipe_close (TO_SOCKET (respipe [1]));
		388
		389	#ifdef _WIN32
		390	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		391	#else
		392	if (pipe (respipe))
		393	#endif
		394	croak ("unable to initialize result pipe");
		395
		396	if (old_readfd >= 0)
120	{	397	{
121	fd_set rfd;	398	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
122	FD_ZERO(&rfd);	399	croak ("unable to initialize result pipe(2)");
123	FD_SET(respipe [0], &rfd);
124		400
125	select (respipe [0] + 1, &rfd, 0, 0, 0);	401	respipe_close (respipe [0]);
		402	respipe [0] = old_readfd;
126	}	403	}
127	}
128		404
129	static int	405	#ifdef _WIN32
130	poll_cb ()	406	int arg = 1;
131	{	407	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
132	dSP;	408	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
133	int count = 0;	409	#else
134	int do_croak = 0;	410	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
135	aio_req req;	411	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		412	#endif
		413	croak ("unable to initialize result pipe(3)");
136		414
		415	respipe_osf [0] = TO_SOCKET (respipe [0]);
		416	respipe_osf [1] = TO_SOCKET (respipe [1]);
		417	}
		418
		419	static void poll_wait (void)
		420	{
		421	fd_set rfd;
		422
		423	while (eio_nreqs ())
		424	{
		425	int size;
		426
		427	X_LOCK (reslock);
		428	size = res_queue.size;
		429	X_UNLOCK (reslock);
		430
		431	if (size)
		432	return;
		433
		434	etp_maybe_start_thread ();
		435
		436	FD_ZERO (&rfd);
		437	FD_SET (respipe [0], &rfd);
		438
		439	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		440	}
		441	}
		442
		443	static int poll_cb (void)
		444	{
137	for (;;)	445	for (;;)
138	{	446	{
139	pthread_mutex_lock (&reslock);	447	int res = eio_poll ();
140	req = ress;
141		448
142	if (req)	449	if (res > 0)
143	{
144	ress = req->next;
145
146	if (!ress)
147	{
148	/* read any signals sent by the worker threads */
149	char buf [32];
150	while (read (respipe [0], buf, 32) == 32)
151	;
152
153	rese = 0;
154	}
155	}
156
157	pthread_mutex_unlock (&reslock);
158
159	if (!req)
160	break;
161
162	nreqs--;
163
164	if (req->type == REQ_QUIT)
165	started--;
166	else
167	{
168	int errorno = errno;
169	errno = req->errorno;
170
171	if (req->type == REQ_READ)
172	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
173
174	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
175	SvREADONLY_off (req->data);
176
177	if (req->statdata)
178	{
179	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
180	PL_laststatval = req->result;
181	PL_statcache = *(req->statdata);
182	}
183
184	ENTER;
185	PUSHMARK (SP);
186
187	if (req->type == REQ_READDIR)
188	{
189	SV *rv = &PL_sv_undef;
190
191	if (req->result >= 0)
192	{
193	char *buf = req->data2ptr;
194	AV *av = newAV ();
195
196	while (req->result)
197	{
198	SV *sv = newSVpv (buf, 0);
199
200	av_push (av, sv);
201	buf += SvCUR (sv) + 1;
202	req->result--;
203	}
204
205	rv = sv_2mortal (newRV_noinc ((SV *)av));
206	}
207
208	XPUSHs (rv);
209	}
210	else
211	{
212	XPUSHs (sv_2mortal (newSViv (req->result)));
213
214	if (req->type == REQ_OPEN)
215	{
216	/* convert fd to fh */
217	SV *fh;
218
219	PUTBACK;
220	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
221	SPAGAIN;
222
223	fh = SvREFCNT_inc (POPs);
224
225	PUSHMARK (SP);
226	XPUSHs (sv_2mortal (fh));
227	}
228	}
229
230	if (SvOK (req->callback))
231	{
232	PUTBACK;
233	call_sv (req->callback, G_VOID | G_EVAL);
234	SPAGAIN;
235
236	if (SvTRUE (ERRSV))
237	{
238	free_req (req);
239	croak (0);	450	croak (0);
240	}
241	}
242		451
243	LEAVE;	452	if (!max_outstanding || max_outstanding > eio_nreqs ())
		453	return res;
244		454
245	errno = errorno;	455	poll_wait ();
246	count++;
247	}
248
249	free_req (req);
250	}	456	}
251
252	return count;
253	}	457	}
254		458
255	static void *aio_proc(void *arg);	459	static void atfork_child (void)
256
257	static void
258	start_thread (void)
259	{	460	{
260	sigset_t fullsigset, oldsigset;	461	create_respipe ();
261	pthread_t tid;
262	pthread_attr_t attr;
263
264	pthread_attr_init (&attr);
265	pthread_attr_setstacksize (&attr, STACKSIZE);
266	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
267
268	sigfillset (&fullsigset);
269	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
270
271	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
272	started++;
273
274	sigprocmask (SIG_SETMASK, &oldsigset, 0);
275	}	462	}
276		463
277	static void	464	static SV *
278	send_req (aio_req req)	465	get_cb (SV *cb_sv)
279	{	466	{
280	while (started < wanted && nreqs >= started)	467	HV *st;
281	start_thread ();	468	GV *gvp;
		469	CV *cv;
282		470
283	nreqs++;	471	if (!SvOK (cb_sv))
284
285	pthread_mutex_lock (&reqlock);
286
287	req->next = 0;
288
289	if (reqe)
290	{
291	reqe->next = req;
292	reqe = req;
293	}
294	else
295	reqe = reqs = req;
296
297	pthread_cond_signal (&reqwait);
298	pthread_mutex_unlock (&reqlock);
299
300	if (nreqs > max_outstanding)
301	for (;;)
302	{
303	poll_cb ();
304
305	if (nreqs <= max_outstanding)
306	break;
307
308	poll_wait ();
309	}
310	}
311
312	static void
313	end_thread (void)
314	{
315	aio_req req;
316	Newz (0, req, 1, aio_cb);
317	req->type = REQ_QUIT;
318
319	send_req (req);
320	}
321
322	static void min_parallel (int nthreads)
323	{
324	if (wanted < nthreads)
325	wanted = nthreads;
326	}
327
328	static void max_parallel (int nthreads)
329	{
330	int cur = started;
331
332	if (wanted > nthreads)
333	wanted = nthreads;
334
335	while (cur > wanted)
336	{
337	end_thread ();
338	cur--;
339	}
340
341	while (started > wanted)
342	{
343	poll_wait ();
344	poll_cb ();
345	}
346	}
347
348	static void create_pipe ()
349	{
350	if (pipe (respipe))
351	croak ("unable to initialize result pipe");
352
353	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
354	croak ("cannot set result pipe to nonblocking mode");
355
356	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
357	croak ("cannot set result pipe to nonblocking mode");
358	}
359
360	/*****************************************************************************/
361	/* work around various missing functions */
362
363	#if !HAVE_PREADWRITE
364	# define pread aio_pread
365	# define pwrite aio_pwrite
366
367	/*
368	* make our pread/pwrite safe against themselves, but not against
369	* normal read/write by using a mutex. slows down execution a lot,
370	* but that's your problem, not mine.
371	*/
372	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
373
374	static ssize_t
375	pread (int fd, void *buf, size_t count, off_t offset)
376	{
377	ssize_t res;
378	off_t ooffset;
379
380	pthread_mutex_lock (&preadwritelock);
381	ooffset = lseek (fd, 0, SEEK_CUR);
382	lseek (fd, offset, SEEK_SET);
383	res = read (fd, buf, count);
384	lseek (fd, ooffset, SEEK_SET);
385	pthread_mutex_unlock (&preadwritelock);
386
387	return res;
388	}
389
390	static ssize_t
391	pwrite (int fd, void *buf, size_t count, off_t offset)
392	{
393	ssize_t res;
394	off_t ooffset;
395
396	pthread_mutex_lock (&preadwritelock);
397	ooffset = lseek (fd, 0, SEEK_CUR);
398	lseek (fd, offset, SEEK_SET);
399	res = write (fd, buf, count);
400	lseek (fd, offset, SEEK_SET);
401	pthread_mutex_unlock (&preadwritelock);
402
403	return res;
404	}
405	#endif
406
407	#if !HAVE_FDATASYNC
408	# define fdatasync fsync
409	#endif
410
411	#if !HAVE_READAHEAD
412	# define readahead aio_readahead
413
414	static ssize_t
415	readahead (int fd, off_t offset, size_t count)
416	{
417	char readahead_buf[4096];
418
419	while (count > 0)
420	{
421	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
422
423	pread (fd, readahead_buf, len, offset);
424	offset += len;
425	count -= len;
426	}
427
428	errno = 0;
429	}
430	#endif
431
432	#if !HAVE_READDIR_R
433	# define readdir_r aio_readdir_r
434
435	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
436
437	static int
438	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
439	{
440	struct dirent *e;
441	int errorno;
442
443	pthread_mutex_lock (&readdirlock);
444
445	e = readdir (dirp);
446	errorno = errno;
447
448	if (e)
449	{
450	*res = ent;
451	strcpy (ent->d_name, e->d_name);
452	}
453	else
454	*res = 0;
455
456	pthread_mutex_unlock (&readdirlock);
457
458	errno = errorno;
459	return e ? 0 : -1;
460	}
461	#endif
462
463	/* sendfile always needs emulation */
464	static ssize_t
465	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
466	{
467	ssize_t res;
468
469	if (!count)
470	return 0;	472	return 0;
471		473
472	#if HAVE_SENDFILE	474	cv = sv_2cv (cb_sv, &st, &gvp, 0);
473	# if __linux
474	res = sendfile (ofd, ifd, &offset, count);
475		475
476	# elif __freebsd	476	if (!cv)
477	/*	477	croak ("IO::AIO callback must be undef or a CODE reference");
478	* Of course, the freebsd sendfile is a dire hack with no thoughts
479	* wasted on making it similar to other I/O functions.
480	*/
481	{
482	off_t sbytes;
483	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
484		478
485	if (res < 0 && sbytes)	479	return (SV *)cv;
486	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
487	res = sbytes;
488	}
489
490	# elif __hpux
491	res = sendfile (ofd, ifd, offset, count, 0, 0);
492
493	# elif __solaris
494	{
495	struct sendfilevec vec;
496	size_t sbytes;
497
498	vec.sfv_fd = ifd;
499	vec.sfv_flag = 0;
500	vec.sfv_off = offset;
501	vec.sfv_len = count;
502
503	res = sendfilev (ofd, &vec, 1, &sbytes);
504
505	if (res < 0 && sbytes)
506	res = sbytes;
507	}
508
509	# endif
510	#else
511	res = -1;
512	errno = ENOSYS;
513	#endif
514
515	if (res < 0
516	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
517	#if __solaris
518	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
519	#endif
520	)
521	)
522	{
523	/* emulate sendfile. this is a major pain in the ass */
524	char buf[4096];
525	res = 0;
526
527	while (count)
528	{
529	ssize_t cnt;
530
531	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
532
533	if (cnt <= 0)
534	{
535	if (cnt && !res) res = -1;
536	break;
537	}
538
539	cnt = write (ofd, buf, cnt);
540
541	if (cnt <= 0)
542	{
543	if (cnt && !res) res = -1;
544	break;
545	}
546
547	offset += cnt;
548	res += cnt;
549	count -= cnt;
550	}
551	}
552
553	return res;
554	}
555
556	/* read a full directory */
557	static int
558	scandir_ (const char *path, void **namesp)
559	{
560	DIR *dirp = opendir (path);
561	union
562	{
563	struct dirent d;
564	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
565	} u;
566	struct dirent *entp;
567	char *name, *names;
568	int memlen = 4096;
569	int memofs = 0;
570	int res = 0;
571	int errorno;
572
573	if (!dirp)
574	return -1;
575
576	names = malloc (memlen);
577
578	for (;;)
579	{
580	errno = 0, readdir_r (dirp, &u.d, &entp);
581
582	if (!entp)
583	break;
584
585	name = entp->d_name;
586
587	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
588	{
589	int len = strlen (name) + 1;
590
591	res++;
592
593	while (memofs + len > memlen)
594	{
595	memlen *= 2;
596	names = realloc (names, memlen);
597	if (!names)
598	break;
599	}
600
601	memcpy (names + memofs, name, len);
602	memofs += len;
603	}
604	}
605
606	errorno = errno;
607	closedir (dirp);
608
609	if (errorno)
610	{
611	free (names);
612	errno = errorno;
613	res = -1;
614	}
615
616	*namesp = (void *)names;
617	return res;
618	}
619
620	/*****************************************************************************/
621
622	static void *
623	aio_proc (void *thr_arg)
624	{
625	aio_req req;
626	int type;
627
628	do
629	{
630	pthread_mutex_lock (&reqlock);
631
632	for (;;)
633	{
634	req = reqs;
635
636	if (reqs)
637	{
638	reqs = reqs->next;
639	if (!reqs) reqe = 0;
640	}
641
642	if (req)
643	break;
644
645	pthread_cond_wait (&reqwait, &reqlock);
646	}
647
648	pthread_mutex_unlock (&reqlock);
649
650	errno = 0; /* strictly unnecessary */
651
652	type = req->type;
653
654	switch (type)
655	{
656	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
657	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
658
659	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
660	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
661
662	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
663	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
664	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
665
666	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
667	case REQ_CLOSE: req->result = close (req->fd); break;
668	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
669	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
670	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
671
672	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
673	case REQ_FSYNC: req->result = fsync (req->fd); break;
674	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
675
676	case REQ_QUIT:
677	break;
678
679	default:
680	req->result = ENOSYS;
681	break;
682	}
683
684	req->errorno = errno;
685
686	pthread_mutex_lock (&reslock);
687
688	req->next = 0;
689
690	if (rese)
691	{
692	rese->next = req;
693	rese = req;
694	}
695	else
696	{
697	rese = ress = req;
698
699	/* write a dummy byte to the pipe so fh becomes ready */
700	write (respipe [1], &respipe, 1);
701	}
702
703	pthread_mutex_unlock (&reslock);
704	}
705	while (type != REQ_QUIT);
706
707	return 0;
708	}
709
710	/*****************************************************************************/
711
712	static void atfork_prepare (void)
713	{
714	pthread_mutex_lock (&reqlock);
715	pthread_mutex_lock (&reslock);
716	#if !HAVE_PREADWRITE
717	pthread_mutex_lock (&preadwritelock);
718	#endif
719	#if !HAVE_READDIR_R
720	pthread_mutex_lock (&readdirlock);
721	#endif
722	}
723
724	static void atfork_parent (void)
725	{
726	#if !HAVE_READDIR_R
727	pthread_mutex_unlock (&readdirlock);
728	#endif
729	#if !HAVE_PREADWRITE
730	pthread_mutex_unlock (&preadwritelock);
731	#endif
732	pthread_mutex_unlock (&reslock);
733	pthread_mutex_unlock (&reqlock);
734	}
735
736	static void atfork_child (void)
737	{
738	aio_req prv;
739
740	started = 0;
741
742	while (reqs)
743	{
744	prv = reqs;
745	reqs = prv->next;
746	free_req (prv);
747	}
748
749	reqs = reqe = 0;
750
751	while (ress)
752	{
753	prv = ress;
754	ress = prv->next;
755	free_req (prv);
756	}
757
758	ress = rese = 0;
759
760	close (respipe [0]);
761	close (respipe [1]);
762	create_pipe ();
763
764	atfork_parent ();
765	}	480	}
766		481
767	#define dREQ \	482	#define dREQ \
		483	SV *cb_cv; \
768	aio_req req; \	484	aio_req req; \
		485	int req_pri = next_pri; \
		486	next_pri = EIO_PRI_DEFAULT; \
769	\	487	\
770	if (SvOK (callback) && !SvROK (callback)) \	488	cb_cv = get_cb (callback); \
771	croak ("clalback must be undef or of reference type"); \
772	\	489	\
773	Newz (0, req, 1, aio_cb); \	490	Newz (0, req, 1, eio_req); \
774	if (!req) \	491	if (!req) \
775	croak ("out of memory during aio_req allocation"); \	492	croak ("out of memory during eio_req allocation"); \
776	\	493	\
777	req->callback = newSVsv (callback);	494	req->callback = SvREFCNT_inc (cb_cv); \
		495	req->pri = req_pri
		496
		497	#define REQ_SEND \
		498	PUTBACK; \
		499	req_submit (req); \
		500	SPAGAIN; \
		501	\
		502	if (GIMME_V != G_VOID) \
		503	XPUSHs (req_sv (req, AIO_REQ_KLASS));
778		504
779	MODULE = IO::AIO PACKAGE = IO::AIO	505	MODULE = IO::AIO PACKAGE = IO::AIO
780		506
781	PROTOTYPES: ENABLE	507	PROTOTYPES: ENABLE
782		508
783	BOOT:	509	BOOT:
784	{	510	{
785	create_pipe ();	511	stash = gv_stashpv ("IO::AIO", 1);
786	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
787	}
788		512
		513	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		514	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		515	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		516	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		517	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		518	#ifndef _WIN32
		519	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		520	#endif
		521	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		522	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		523	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		524	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
		525
		526	create_respipe ();
		527
		528	if (eio_init (want_poll, done_poll) < 0)
		529	croak ("IO::AIO: unable to initialise eio library");
		530
		531	/* atfork child called in fifo order, so before eio's handler */
		532	X_THREAD_ATFORK (0, 0, atfork_child);
		533	}
		534
789	void	535	void
790	min_parallel(nthreads)	536	max_poll_reqs (int nreqs)
791	int nthreads
792	PROTOTYPE: $	537	PROTOTYPE: $
		538	CODE:
		539	eio_set_max_poll_reqs (nreqs);
793		540
794	void	541	void
795	max_parallel(nthreads)	542	max_poll_time (double nseconds)
796	int nthreads
797	PROTOTYPE: $	543	PROTOTYPE: $
798
799	int
800	max_outstanding(nreqs)
801	int nreqs
802	PROTOTYPE: $
803	CODE:	544	CODE:
804	RETVAL = max_outstanding;	545	eio_set_max_poll_time (nseconds);
		546
		547	void
		548	min_parallel (int nthreads)
		549	PROTOTYPE: $
		550	CODE:
		551	eio_set_min_parallel (nthreads);
		552
		553	void
		554	max_parallel (int nthreads)
		555	PROTOTYPE: $
		556	CODE:
		557	eio_set_max_parallel (nthreads);
		558
		559	void
		560	max_idle (int nthreads)
		561	PROTOTYPE: $
		562	CODE:
		563	eio_set_max_idle (nthreads);
		564
		565	void
		566	max_outstanding (int maxreqs)
		567	PROTOTYPE: $
		568	CODE:
805	max_outstanding = nreqs;	569	max_outstanding = maxreqs;
806		570
807	void	571	void
808	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	572	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
809	SV * pathname
810	int flags
811	int mode
812	SV * callback
813	PROTOTYPE: $$$;$	573	PROTOTYPE: $$$;$
814	CODE:	574	PPCODE:
815	{	575	{
816	dREQ;	576	dREQ;
817		577
818	req->type = REQ_OPEN;	578	req->type = EIO_OPEN;
819	req->data = newSVsv (pathname);	579	req->sv1 = newSVsv (pathname);
820	req->dataptr = SvPVbyte_nolen (req->data);	580	req->ptr1 = SvPVbyte_nolen (req->sv1);
821	req->fd = flags;	581	req->int1 = flags;
822	req->mode = mode;	582	req->int2 = mode;
823		583
824	send_req (req);	584	REQ_SEND;
825	}	585	}
826		586
827	void	587	void
828	aio_close(fh,callback=&PL_sv_undef)	588	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
829	SV * fh
830	SV * callback
831	PROTOTYPE: $;$	589	PROTOTYPE: $;$
832	ALIAS:	590	ALIAS:
833	aio_close = REQ_CLOSE
834	aio_fsync = REQ_FSYNC	591	aio_fsync = EIO_FSYNC
835	aio_fdatasync = REQ_FDATASYNC	592	aio_fdatasync = EIO_FDATASYNC
836	CODE:	593	PPCODE:
837	{	594	{
838	dREQ;	595	dREQ;
839		596
840	req->type = ix;	597	req->type = ix;
841	req->fh = newSVsv (fh);	598	req->sv1 = newSVsv (fh);
842	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	599	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
843		600
844	send_req (req);	601	REQ_SEND (req);
845	}	602	}
846		603
847	void	604	void
		605	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		606	PROTOTYPE: $$$$;$
		607	PPCODE:
		608	{
		609	dREQ;
		610
		611	req->type = EIO_SYNC_FILE_RANGE;
		612	req->sv1 = newSVsv (fh);
		613	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		614	req->offs = SvVAL64 (offset);
		615	req->size = SvVAL64 (nbytes);
		616	req->int2 = flags;
		617
		618	REQ_SEND (req);
		619	}
		620
		621	void
		622	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		623	PROTOTYPE: $;$
		624	PPCODE:
		625	{
		626	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		627	dREQ;
		628
		629	if (close_pipe < 0)
		630	{
		631	int pipefd [2];
		632
		633	if (pipe (pipefd) < 0
		634	|| close (pipefd [1]) < 0
		635	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		636	abort (); /*D*/
		637
		638	close_pipe = pipefd [0];
		639	}
		640
		641	req->type = EIO_DUP2;
		642	req->int1 = close_pipe;
		643	req->sv2 = newSVsv (fh);
		644	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		645
		646	REQ_SEND (req);
		647	}
		648
		649	void
848	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	650	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
849	SV * fh
850	UV offset
851	UV length
852	SV * data
853	UV dataoffset
854	SV * callback
855	ALIAS:	651	ALIAS:
856	aio_read = REQ_READ	652	aio_read = EIO_READ
857	aio_write = REQ_WRITE	653	aio_write = EIO_WRITE
858	PROTOTYPE: $$$$$;$	654	PROTOTYPE: $$$$$;$
859	CODE:	655	PPCODE:
860	{	656	{
861	aio_req req;
862	STRLEN svlen;	657	STRLEN svlen;
863	char *svptr = SvPVbyte (data, svlen);	658	char *svptr = SvPVbyte (data, svlen);
		659	UV len = SvUV (length);
		660	int fd;
		661
		662	if (SvTYPE (data) > SVt_PVMG)
		663	croak ("illegal data argument '%s', must be plain scalar string", SvPV_nolen (data));
864		664
865	SvUPGRADE (data, SVt_PV);	665	SvUPGRADE (data, SVt_PV);
866	SvPOK_on (data);	666	SvPOK_only (data);
867		667
868	if (dataoffset < 0)	668	if (dataoffset < 0)
869	dataoffset += svlen;	669	dataoffset += svlen;
870		670
871	if (dataoffset < 0 || dataoffset > svlen)	671	if (dataoffset < 0 || dataoffset > svlen)
872	croak ("data offset outside of string");	672	croak ("dataoffset outside of data scalar");
873		673
874	if (ix == REQ_WRITE)	674	if (ix == EIO_WRITE)
875	{	675	{
876	/* write: check length and adjust. */	676	/* write: check length and adjust. */
877	if (length < 0 || length + dataoffset > svlen)	677	if (!SvOK (length) || len + dataoffset > svlen)
878	length = svlen - dataoffset;	678	len = svlen - dataoffset;
879	}	679	}
880	else	680	else
881	{	681	{
882	/* read: grow scalar as necessary */	682	/* read: grow scalar as necessary */
883	svptr = SvGROW (data, length + dataoffset);	683	svptr = SvGROW (data, len + dataoffset + 1);
884	}	684	}
885		685
886	if (length < 0)	686	if (len < 0)
887	croak ("length must not be negative");	687	croak ("length must not be negative");
		688
		689	fd = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
		690	: IoOFP (sv_2io (fh)));
		691
		692	if (fd < 0)
		693	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
888		694
889	{	695	{
890	dREQ;	696	dREQ;
891		697
892	req->type = ix;	698	req->type = ix;
893	req->fh = newSVsv (fh);	699	req->sv1 = newSVsv (fh);
894	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	700	req->int1 = fd;
895	: IoOFP (sv_2io (fh)));	701	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
896	req->offset = offset;	702	req->size = len;
897	req->length = length;
898	req->data = SvREFCNT_inc (data);	703	req->sv2 = SvREFCNT_inc (data);
899	req->dataptr = (char *)svptr + dataoffset;	704	req->ptr2 = (char *)svptr + dataoffset;
		705	req->stroffset = dataoffset;
900		706
901	if (!SvREADONLY (data))	707	if (!SvREADONLY (data))
902	{	708	{
903	SvREADONLY_on (data);	709	SvREADONLY_on (data);
904	req->data2ptr = (void *)data;	710	req->flags |= FLAG_SV2_RO_OFF;
905	}	711	}
906		712
907	send_req (req);	713	REQ_SEND;
908	}	714	}
909	}	715	}
910		716
911	void	717	void
		718	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		719	PROTOTYPE: $$;$
		720	PPCODE:
		721	{
		722	SV *data;
		723	dREQ;
		724
		725	req->type = EIO_READLINK;
		726	req->sv1 = newSVsv (path);
		727	req->ptr1 = SvPVbyte_nolen (req->sv1);
		728
		729	REQ_SEND;
		730	}
		731
		732	void
912	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	733	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
913	SV * out_fh
914	SV * in_fh
915	UV in_offset
916	UV length
917	SV * callback
918	PROTOTYPE: $$$$;$	734	PROTOTYPE: $$$$;$
919	CODE:	735	PPCODE:
920	{	736	{
921	dREQ;	737	dREQ;
922		738
923	req->type = REQ_SENDFILE;	739	req->type = EIO_SENDFILE;
924	req->fh = newSVsv (out_fh);	740	req->sv1 = newSVsv (out_fh);
925	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	741	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
926	req->fh2 = newSVsv (in_fh);	742	req->sv2 = newSVsv (in_fh);
927	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	743	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
928	req->offset = in_offset;	744	req->offs = SvVAL64 (in_offset);
929	req->length = length;	745	req->size = length;
930		746
931	send_req (req);	747	REQ_SEND;
932	}	748	}
933		749
934	void	750	void
935	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	751	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
936	SV * fh
937	UV offset
938	IV length
939	SV * callback
940	PROTOTYPE: $$$;$	752	PROTOTYPE: $$$;$
941	CODE:	753	PPCODE:
942	{	754	{
943	dREQ;	755	dREQ;
944		756
945	req->type = REQ_READAHEAD;	757	req->type = EIO_READAHEAD;
946	req->fh = newSVsv (fh);	758	req->sv1 = newSVsv (fh);
947	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	759	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
948	req->offset = offset;	760	req->offs = SvVAL64 (offset);
949	req->length = length;	761	req->size = length;
950		762
951	send_req (req);	763	REQ_SEND;
952	}	764	}
953		765
954	void	766	void
955	aio_stat(fh_or_path,callback=&PL_sv_undef)	767	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
956	SV * fh_or_path
957	SV * callback
958	ALIAS:	768	ALIAS:
959	aio_stat = REQ_STAT	769	aio_stat = EIO_STAT
960	aio_lstat = REQ_LSTAT	770	aio_lstat = EIO_LSTAT
961	CODE:	771	PPCODE:
962	{	772	{
963	dREQ;	773	dREQ;
964		774
965	New (0, req->statdata, 1, Stat_t);	775	req->sv1 = newSVsv (fh_or_path);
966	if (!req->statdata)
967	{
968	free_req (req);
969	croak ("out of memory during aio_req->statdata allocation");
970	}
971		776
972	if (SvPOK (fh_or_path))	777	if (SvPOK (req->sv1))
973	{	778	{
974	req->type = ix;	779	req->type = ix;
975	req->data = newSVsv (fh_or_path);
976	req->dataptr = SvPVbyte_nolen (req->data);	780	req->ptr1 = SvPVbyte_nolen (req->sv1);
977	}	781	}
978	else	782	else
979	{	783	{
980	req->type = REQ_FSTAT;	784	req->type = EIO_FSTAT;
981	req->fh = newSVsv (fh_or_path);
982	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	785	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		786	}
		787
		788	REQ_SEND;
		789	}
		790
		791	void
		792	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		793	PPCODE:
		794	{
		795	dREQ;
		796
		797	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		798	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		799	req->sv1 = newSVsv (fh_or_path);
		800
		801	if (SvPOK (req->sv1))
983	}	802	{
		803	req->type = EIO_UTIME;
		804	req->ptr1 = SvPVbyte_nolen (req->sv1);
		805	}
		806	else
		807	{
		808	req->type = EIO_FUTIME;
		809	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		810	}
984		811
985	send_req (req);	812	REQ_SEND;
986	}	813	}
987		814
988	void	815	void
		816	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		817	PPCODE:
		818	{
		819	dREQ;
		820
		821	req->sv1 = newSVsv (fh_or_path);
		822	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		823
		824	if (SvPOK (req->sv1))
		825	{
		826	req->type = EIO_TRUNCATE;
		827	req->ptr1 = SvPVbyte_nolen (req->sv1);
		828	}
		829	else
		830	{
		831	req->type = EIO_FTRUNCATE;
		832	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		833	}
		834
		835	REQ_SEND;
		836	}
		837
		838	void
		839	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		840	ALIAS:
		841	aio_chmod = EIO_CHMOD
		842	aio_mkdir = EIO_MKDIR
		843	PPCODE:
		844	{
		845	dREQ;
		846
		847	req->int2 = mode;
		848	req->sv1 = newSVsv (fh_or_path);
		849
		850	if (SvPOK (req->sv1))
		851	{
		852	req->type = ix;
		853	req->ptr1 = SvPVbyte_nolen (req->sv1);
		854	}
		855	else
		856	{
		857	req->type = EIO_FCHMOD;
		858	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		859	}
		860
		861	REQ_SEND;
		862	}
		863
		864	void
		865	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		866	PPCODE:
		867	{
		868	dREQ;
		869
		870	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		871	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		872	req->sv1 = newSVsv (fh_or_path);
		873
		874	if (SvPOK (req->sv1))
		875	{
		876	req->type = EIO_CHOWN;
		877	req->ptr1 = SvPVbyte_nolen (req->sv1);
		878	}
		879	else
		880	{
		881	req->type = EIO_FCHOWN;
		882	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		883	}
		884
		885	REQ_SEND;
		886	}
		887
		888	void
989	aio_unlink(pathname,callback=&PL_sv_undef)	889	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
990	SV * pathname
991	SV * callback
992	ALIAS:	890	ALIAS:
993	aio_unlink = REQ_UNLINK	891	aio_unlink = EIO_UNLINK
994	aio_rmdir = REQ_RMDIR	892	aio_rmdir = EIO_RMDIR
		893	aio_readdir = EIO_READDIR
995	CODE:	894	PPCODE:
996	{	895	{
997	dREQ;	896	dREQ;
998		897
999	req->type = ix;	898	req->type = ix;
1000	req->data = newSVsv (pathname);	899	req->sv1 = newSVsv (pathname);
1001	req->dataptr = SvPVbyte_nolen (req->data);	900	req->ptr1 = SvPVbyte_nolen (req->sv1);
		901
		902	REQ_SEND;
		903	}
		904
		905	void
		906	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		907	ALIAS:
		908	aio_link = EIO_LINK
		909	aio_symlink = EIO_SYMLINK
		910	aio_rename = EIO_RENAME
		911	PPCODE:
		912	{
		913	dREQ;
1002		914
1003	send_req (req);	915	req->type = ix;
1004	}	916	req->sv1 = newSVsv (oldpath);
1005		917	req->ptr1 = SvPVbyte_nolen (req->sv1);
1006	void	918	req->sv2 = newSVsv (newpath);
1007	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	919	req->ptr2 = SvPVbyte_nolen (req->sv2);
1008	SV * oldpath
1009	SV * newpath
1010	SV * callback
1011	CODE:
1012	{
1013	dREQ;
1014		920
1015	req->type = REQ_SYMLINK;	921	REQ_SEND;
1016	req->fh = newSVsv (oldpath);	922	}
1017	req->data2ptr = SvPVbyte_nolen (req->fh);	923
1018	req->data = newSVsv (newpath);	924	void
1019	req->dataptr = SvPVbyte_nolen (req->data);	925	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		926	PPCODE:
		927	{
		928	dREQ;
1020		929
1021	send_req (req);	930	req->type = EIO_MKNOD;
1022	}	931	req->sv1 = newSVsv (pathname);
1023		932	req->ptr1 = SvPVbyte_nolen (req->sv1);
1024	void	933	req->int2 = (mode_t)mode;
1025	aio_readdir(pathname,callback=&PL_sv_undef)	934	req->offs = dev;
1026	SV * pathname
1027	SV * callback
1028	CODE:
1029	{
1030	dREQ;
1031		935
		936	REQ_SEND;
		937	}
		938
		939	void
		940	aio_busy (double delay, SV *callback=&PL_sv_undef)
		941	PPCODE:
		942	{
		943	dREQ;
		944
		945	req->type = EIO_BUSY;
		946	req->nv1 = delay < 0. ? 0. : delay;
		947
		948	REQ_SEND;
		949	}
		950
		951	void
		952	aio_group (SV *callback=&PL_sv_undef)
		953	PROTOTYPE: ;$
		954	PPCODE:
		955	{
		956	dREQ;
		957
		958	req->type = EIO_GROUP;
		959
		960	req_submit (req);
		961	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		962	}
		963
		964	void
		965	aio_nop (SV *callback=&PL_sv_undef)
		966	ALIAS:
		967	aio_nop = EIO_NOP
		968	aio_sync = EIO_SYNC
		969	PPCODE:
		970	{
		971	dREQ;
		972
1032	req->type = REQ_READDIR;	973	req->type = ix;
1033	req->data = newSVsv (pathname);
1034	req->dataptr = SvPVbyte_nolen (req->data);
1035
1036	send_req (req);
1037	}
1038		974
		975	REQ_SEND;
		976	}
		977
		978	int
		979	aioreq_pri (int pri = 0)
		980	PROTOTYPE: ;$
		981	CODE:
		982	RETVAL = next_pri;
		983	if (items > 0)
		984	{
		985	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		986	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		987	next_pri = pri;
		988	}
		989	OUTPUT:
		990	RETVAL
		991
1039	void	992	void
		993	aioreq_nice (int nice = 0)
		994	CODE:
		995	nice = next_pri - nice;
		996	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		997	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		998	next_pri = nice;
		999
		1000	void
1040	flush()	1001	flush ()
1041	PROTOTYPE:	1002	PROTOTYPE:
1042	CODE:	1003	CODE:
1043	while (nreqs)	1004	while (eio_nreqs ())
1044	{	1005	{
1045	poll_wait ();	1006	poll_wait ();
1046	poll_cb ();	1007	poll_cb ();
1047	}	1008	}
1048		1009
1049	void	1010	int
1050	poll()	1011	poll()
1051	PROTOTYPE:	1012	PROTOTYPE:
1052	CODE:	1013	CODE:
1053	if (nreqs)
1054	{
1055	poll_wait ();	1014	poll_wait ();
1056	poll_cb ();	1015	RETVAL = poll_cb ();
1057	}	1016	OUTPUT:
		1017	RETVAL
1058		1018
1059	int	1019	int
1060	poll_fileno()	1020	poll_fileno()
1061	PROTOTYPE:	1021	PROTOTYPE:
1062	CODE:	1022	CODE:
…		…
1074		1034
1075	void	1035	void
1076	poll_wait()	1036	poll_wait()
1077	PROTOTYPE:	1037	PROTOTYPE:
1078	CODE:	1038	CODE:
1079	if (nreqs)
1080	poll_wait ();	1039	poll_wait ();
1081		1040
1082	int	1041	int
1083	nreqs()	1042	nreqs()
1084	PROTOTYPE:	1043	PROTOTYPE:
1085	CODE:	1044	CODE:
1086	RETVAL = nreqs;	1045	RETVAL = eio_nreqs ();
1087	OUTPUT:	1046	OUTPUT:
1088	RETVAL	1047	RETVAL
1089		1048
		1049	int
		1050	nready()
		1051	PROTOTYPE:
		1052	CODE:
		1053	RETVAL = eio_nready ();
		1054	OUTPUT:
		1055	RETVAL
		1056
		1057	int
		1058	npending()
		1059	PROTOTYPE:
		1060	CODE:
		1061	RETVAL = eio_npending ();
		1062	OUTPUT:
		1063	RETVAL
		1064
		1065	int
		1066	nthreads()
		1067	PROTOTYPE:
		1068	CODE:
		1069	RETVAL = eio_nthreads ();
		1070	OUTPUT:
		1071	RETVAL
		1072
		1073	void _on_next_submit (SV *cb)
		1074	CODE:
		1075	SvREFCNT_dec (on_next_submit);
		1076	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1077
		1078	PROTOTYPES: DISABLE
		1079
		1080	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1081
		1082	void
		1083	cancel (aio_req_ornot req)
		1084	CODE:
		1085	eio_cancel (req);
		1086
		1087	void
		1088	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1089	PPCODE:
		1090	{
		1091	if (GIMME_V != G_VOID)
		1092	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1093
		1094	if (items > 1)
		1095	{
		1096	SV *cb_cv = get_cb (callback);
		1097
		1098	SvREFCNT_dec (req->callback);
		1099	req->callback = SvREFCNT_inc (cb_cv);
		1100	}
		1101	}
		1102
		1103	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1104
		1105	void
		1106	add (aio_req grp, ...)
		1107	PPCODE:
		1108	{
		1109	int i;
		1110
		1111	if (grp->int1 == 2)
		1112	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1113
		1114	for (i = 1; i < items; ++i )
		1115	{
		1116	aio_req req;
		1117
		1118	if (GIMME_V != G_VOID)
		1119	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1120
		1121	req = SvAIO_REQ (ST (i));
		1122
		1123	if (req)
		1124	eio_grp_add (grp, req);
		1125	}
		1126	}
		1127
		1128	void
		1129	cancel_subs (aio_req_ornot req)
		1130	CODE:
		1131	req_cancel_subs (req);
		1132
		1133	void
		1134	result (aio_req grp, ...)
		1135	CODE:
		1136	{
		1137	int i;
		1138	AV *av;
		1139
		1140	grp->errorno = errno;
		1141
		1142	av = newAV ();
		1143
		1144	for (i = 1; i < items; ++i )
		1145	av_push (av, newSVsv (ST (i)));
		1146
		1147	SvREFCNT_dec (grp->sv1);
		1148	grp->sv1 = (SV *)av;
		1149	}
		1150
		1151	void
		1152	errno (aio_req grp, int errorno = errno)
		1153	CODE:
		1154	grp->errorno = errorno;
		1155
		1156	void
		1157	limit (aio_req grp, int limit)
		1158	CODE:
		1159	eio_grp_limit (grp, limit);
		1160
		1161	void
		1162	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1163	CODE:
		1164	{
		1165	SvREFCNT_dec (grp->sv2);
		1166	grp->sv2 = newSVsv (callback);
		1167	grp->feed = aio_grp_feed;
		1168
		1169	if (grp->int2 <= 0)
		1170	grp->int2 = 2;
		1171
		1172	eio_grp_limit (grp, grp->int2);
		1173	}
		1174

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