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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.41 by root, Sat Jun 24 19:14:04 2006 UTC vs.
Revision 1.127 by root, Tue Sep 30 13:17:32 2008 UTC

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

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