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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.38 by root, Sun Aug 28 10:51:33 2005 UTC vs.
Revision 1.138 by root, Tue Apr 21 20:06:05 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	#if __ia64	70	/* perl stupidly overrides readdir and maybe others */
37	# define STACKSIZE 65536	71	/* with thread-unsafe versions, imagine that :( */
		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
38	#else	81	#else
39	# define STACKSIZE 8192	82	# define SvVAL64 SvNV
40	#endif	83	#endif
41		84
		85	/*****************************************************************************/
		86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
		89	#else
		90	# define expect(expr,value) (expr)
		91	#endif
		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
42	enum {	119	enum {
43	REQ_QUIT,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
44	REQ_OPEN, REQ_CLOSE,
45	REQ_READ, REQ_WRITE, REQ_READAHEAD,
46	REQ_SENDFILE,
47	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
48	REQ_FSYNC, REQ_FDATASYNC,
49	REQ_UNLINK, REQ_RMDIR,
50	REQ_READDIR,
51	REQ_SYMLINK,
52	};	121	};
53		122
54	typedef struct aio_cb {	123	#include "libeio/eio.c"
55	struct aio_cb *volatile next;
56		124
57	int type;
58
59	/* should receive a cleanup, with unions */
60	int fd, fd2;
61	off_t offset;
62	size_t length;
63	ssize_t result;
64	mode_t mode; /* open */
65	int errorno;
66	SV *data, *callback;
67	SV *fh, *fh2;
68	void *dataptr, *data2ptr;
69	STRLEN dataoffset;
70
71	Stat_t *statdata;
72	} aio_cb;
73
74	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
		126	typedef eio_req *aio_req_ornot;
75		127
76	static int started, wanted;	128	static SV *on_next_submit;
77	static volatile int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
78	static int max_outstanding = 1<<30;	130	static int max_outstanding;
79	static int respipe [2];
80		131
81	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
82	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
83	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
84		133
85	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
86	static volatile aio_req ress, rese; /* queue start, queue end */
87
88	static void free_req (aio_req req)	135	static void req_cancel (aio_req req);
89	{
90	if (req->data)
91	SvREFCNT_dec (req->data);
92		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	{
		318	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		319	*SvEND (req->sv2) = 0;
		320	SvPOK_only (req->sv2);
		321	SvSETMAGIC (req->sv2);
		322	PUSHs (sv_2mortal (newSViv (req->result)));
		323	}
		324	break;
		325
		326	case EIO_DUP2:
		327	if (req->result > 0)
		328	req->result = 0;
		329	/* FALLTHROUGH */
		330
		331	default:
		332	PUSHs (sv_2mortal (newSViv (req->result)));
		333	break;
		334	}
		335
		336	errno = req->errorno;
		337
		338	PUTBACK;
		339	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		340	SPAGAIN;
		341
		342	FREETMPS;
		343	LEAVE;
		344
		345	PUTBACK;
		346	}
		347
		348	return !!SvTRUE (ERRSV);
		349	}
		350
		351	static void req_destroy (aio_req req)
		352	{
93	if (req->fh)	353	if (req->self)
		354	{
		355	sv_unmagic (req->self, PERL_MAGIC_ext);
94	SvREFCNT_dec (req->fh);	356	SvREFCNT_dec (req->self);
		357	}
95		358
96	if (req->fh2)	359	SvREFCNT_dec (req->sv1);
97	SvREFCNT_dec (req->fh2);	360	SvREFCNT_dec (req->sv2);
98
99	if (req->statdata)
100	Safefree (req->statdata);
101
102	if (req->callback)
103	SvREFCNT_dec (req->callback);	361	SvREFCNT_dec (req->callback);
104
105	if (req->type == REQ_READDIR && req->result >= 0)
106	free (req->data2ptr);
107		362
108	Safefree (req);	363	Safefree (req);
109	}	364	}
110		365
		366	static void req_cancel_subs (aio_req grp)
		367	{
		368	aio_req sub;
		369
		370	if (grp->type != EIO_GROUP)
		371	return;
		372
		373	SvREFCNT_dec (grp->sv2);
		374	grp->sv2 = 0;
		375
		376	eio_grp_cancel (grp);
		377	}
		378
		379	#ifdef USE_SOCKETS_AS_HANDLES
		380	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		381	#else
		382	# define TO_SOCKET(x) (x)
		383	#endif
		384
111	static void	385	static void
112	poll_wait ()	386	create_respipe (void)
113	{	387	{
114	if (nreqs && !ress)	388	int old_readfd = respipe [0];
		389
		390	if (respipe [1] >= 0)
		391	respipe_close (TO_SOCKET (respipe [1]));
		392
		393	#ifdef _WIN32
		394	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		395	#else
		396	if (pipe (respipe))
		397	#endif
		398	croak ("unable to initialize result pipe");
		399
		400	if (old_readfd >= 0)
115	{	401	{
116	fd_set rfd;	402	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
117	FD_ZERO(&rfd);	403	croak ("unable to initialize result pipe(2)");
118	FD_SET(respipe [0], &rfd);
119		404
120	select (respipe [0] + 1, &rfd, 0, 0, 0);	405	respipe_close (respipe [0]);
		406	respipe [0] = old_readfd;
121	}	407	}
122	}
123		408
124	static int	409	#ifdef _WIN32
125	poll_cb ()	410	int arg = 1;
126	{	411	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
127	dSP;	412	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
128	int count = 0;	413	#else
129	int do_croak = 0;	414	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
130	aio_req req;	415	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		416	#endif
		417	croak ("unable to initialize result pipe(3)");
131		418
		419	respipe_osf [0] = TO_SOCKET (respipe [0]);
		420	respipe_osf [1] = TO_SOCKET (respipe [1]);
		421	}
		422
		423	static void poll_wait (void)
		424	{
		425	fd_set rfd;
		426
		427	while (eio_nreqs ())
		428	{
		429	int size;
		430
		431	X_LOCK (reslock);
		432	size = res_queue.size;
		433	X_UNLOCK (reslock);
		434
		435	if (size)
		436	return;
		437
		438	etp_maybe_start_thread ();
		439
		440	FD_ZERO (&rfd);
		441	FD_SET (respipe [0], &rfd);
		442
		443	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		444	}
		445	}
		446
		447	static int poll_cb (void)
		448	{
132	for (;;)	449	for (;;)
133	{	450	{
134	pthread_mutex_lock (&reslock);	451	int res = eio_poll ();
135	req = ress;
136		452
137	if (req)	453	if (res > 0)
138	{
139	ress = req->next;
140
141	if (!ress)
142	{
143	/* read any signals sent by the worker threads */
144	char buf [32];
145	while (read (respipe [0], buf, 32) == 32)
146	;
147
148	rese = 0;
149	}
150	}
151
152	pthread_mutex_unlock (&reslock);
153
154	if (!req)
155	break;
156
157	nreqs--;
158
159	if (req->type == REQ_QUIT)
160	started--;
161	else
162	{
163	int errorno = errno;
164	errno = req->errorno;
165
166	if (req->type == REQ_READ)
167	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
168
169	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
170	SvREADONLY_off (req->data);
171
172	if (req->statdata)
173	{
174	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
175	PL_laststatval = req->result;
176	PL_statcache = *(req->statdata);
177	}
178
179	ENTER;
180	PUSHMARK (SP);
181
182	if (req->type == REQ_READDIR)
183	{
184	SV *rv = &PL_sv_undef;
185
186	if (req->result >= 0)
187	{
188	char *buf = req->data2ptr;
189	AV *av = newAV ();
190
191	while (req->result)
192	{
193	SV *sv = newSVpv (buf, 0);
194
195	av_push (av, sv);
196	buf += SvCUR (sv) + 1;
197	req->result--;
198	}
199
200	rv = sv_2mortal (newRV_noinc ((SV *)av));
201	}
202
203	XPUSHs (rv);
204	}
205	else
206	{
207	XPUSHs (sv_2mortal (newSViv (req->result)));
208
209	if (req->type == REQ_OPEN)
210	{
211	/* convert fd to fh */
212	SV *fh;
213
214	PUTBACK;
215	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
216	SPAGAIN;
217
218	fh = SvREFCNT_inc (POPs);
219
220	PUSHMARK (SP);
221	XPUSHs (sv_2mortal (fh));
222	}
223	}
224
225	if (SvOK (req->callback))
226	{
227	PUTBACK;
228	call_sv (req->callback, G_VOID | G_EVAL);
229	SPAGAIN;
230
231	if (SvTRUE (ERRSV))
232	{
233	free_req (req);
234	croak (0);	454	croak (0);
235	}
236	}
237		455
238	LEAVE;	456	if (!max_outstanding || max_outstanding > eio_nreqs ())
		457	return res;
239		458
240	errno = errorno;	459	poll_wait ();
241	count++;
242	}
243
244	free_req (req);
245	}	460	}
246
247	return count;
248	}	461	}
249		462
250	static void *aio_proc(void *arg);	463	static void atfork_child (void)
251
252	static void
253	start_thread (void)
254	{	464	{
255	sigset_t fullsigset, oldsigset;	465	create_respipe ();
256	pthread_t tid;
257	pthread_attr_t attr;
258
259	pthread_attr_init (&attr);
260	pthread_attr_setstacksize (&attr, STACKSIZE);
261	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
262
263	sigfillset (&fullsigset);
264	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
265
266	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
267	started++;
268
269	sigprocmask (SIG_SETMASK, &oldsigset, 0);
270	}	466	}
271		467
272	static void	468	static SV *
273	send_req (aio_req req)	469	get_cb (SV *cb_sv)
274	{	470	{
275	while (started < wanted && nreqs >= started)	471	HV *st;
276	start_thread ();	472	GV *gvp;
		473	CV *cv;
277		474
278	nreqs++;	475	if (!SvOK (cb_sv))
		476	return 0;
279		477
280	pthread_mutex_lock (&reqlock);	478	cv = sv_2cv (cb_sv, &st, &gvp, 0);
281		479
282	req->next = 0;	480	if (!cv)
		481	croak ("IO::AIO callback must be undef or a CODE reference");
283		482
284	if (reqe)	483	return (SV *)cv;
285	{
286	reqe->next = req;
287	reqe = req;
288	}
289	else
290	reqe = reqs = req;
291
292	pthread_cond_signal (&reqwait);
293	pthread_mutex_unlock (&reqlock);
294
295	if (nreqs > max_outstanding)
296	for (;;)
297	{
298	poll_cb ();
299
300	if (nreqs <= max_outstanding)
301	break;
302
303	poll_wait ();
304	}
305	}	484	}
306		485
307	static void	486	#define dREQ \
308	end_thread (void)	487	SV *cb_cv; \
309	{
310	aio_req req;	488	aio_req req; \
		489	int req_pri = next_pri; \
		490	next_pri = EIO_PRI_DEFAULT; \
		491	\
		492	cb_cv = get_cb (callback); \
		493	\
311	Newz (0, req, 1, aio_cb);	494	Newz (0, req, 1, eio_req); \
312	req->type = REQ_QUIT;	495	if (!req) \
		496	croak ("out of memory during eio_req allocation"); \
		497	\
		498	req->callback = SvREFCNT_inc (cb_cv); \
		499	req->pri = req_pri
313		500
314	send_req (req);	501	#define REQ_SEND \
315	}	502	PUTBACK; \
		503	req_submit (req); \
		504	SPAGAIN; \
		505	\
		506	if (GIMME_V != G_VOID) \
		507	XPUSHs (req_sv (req, AIO_REQ_KLASS));
316		508
317	static void min_parallel (int nthreads)
318	{
319	if (wanted < nthreads)
320	wanted = nthreads;
321	}
322
323	static void max_parallel (int nthreads)
324	{
325	int cur = started;
326
327	if (wanted > nthreads)
328	wanted = nthreads;
329
330	while (cur > wanted)
331	{
332	end_thread ();
333	cur--;
334	}
335
336	while (started > wanted)
337	{
338	poll_wait ();
339	poll_cb ();
340	}
341	}
342
343	static void create_pipe ()
344	{
345	if (pipe (respipe))
346	croak ("unable to initialize result pipe");
347
348	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
349	croak ("cannot set result pipe to nonblocking mode");
350
351	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
352	croak ("cannot set result pipe to nonblocking mode");
353	}
354
355	/*****************************************************************************/
356	/* work around various missing functions */
357
358	#if !HAVE_PREADWRITE
359	# define pread aio_pread
360	# define pwrite aio_pwrite
361
362	/*
363	* make our pread/pwrite safe against themselves, but not against
364	* normal read/write by using a mutex. slows down execution a lot,
365	* but that's your problem, not mine.
366	*/
367	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
368
369	static ssize_t	509	static int
370	pread (int fd, void *buf, size_t count, off_t offset)	510	extract_fd (SV *fh, int wr)
371	{	511	{
372	ssize_t res;	512	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
373	off_t ooffset;
374		513
375	pthread_mutex_lock (&preadwritelock);	514	if (fd < 0)
376	ooffset = lseek (fd, 0, SEEK_CUR);	515	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
377	lseek (fd, offset, SEEK_SET);
378	res = read (fd, buf, count);
379	lseek (fd, ooffset, SEEK_SET);
380	pthread_mutex_unlock (&preadwritelock);
381		516
382	return res;	517	return fd;
383	}	518	}
384		519
385	static ssize_t	520	MODULE = IO::AIO PACKAGE = IO::AIO
386	pwrite (int fd, void *buf, size_t count, off_t offset)
387	{
388	ssize_t res;
389	off_t ooffset;
390		521
391	pthread_mutex_lock (&preadwritelock);	522	PROTOTYPES: ENABLE
392	ooffset = lseek (fd, 0, SEEK_CUR);
393	lseek (fd, offset, SEEK_SET);
394	res = write (fd, buf, count);
395	lseek (fd, offset, SEEK_SET);
396	pthread_mutex_unlock (&preadwritelock);
397		523
398	return res;	524	BOOT:
399	}	525	{
		526	stash = gv_stashpv ("IO::AIO", 1);
		527
		528	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		529	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		530	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		531	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		532	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		533	#ifndef _WIN32
		534	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
400	#endif	535	#endif
		536	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		537	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		538	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		539	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
401		540
402	#if !HAVE_FDATASYNC
403	# define fdatasync fsync
404	#endif
405
406	#if !HAVE_READAHEAD
407	# define readahead aio_readahead
408
409	static ssize_t
410	readahead (int fd, off_t offset, size_t count)
411	{
412	char readahead_buf[4096];
413
414	while (count > 0)
415	{
416	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
417
418	pread (fd, readahead_buf, len, offset);
419	offset += len;
420	count -= len;
421	}
422
423	errno = 0;
424	}
425	#endif
426
427	#if !HAVE_READDIR_R
428	# define readdir_r aio_readdir_r
429
430	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
431
432	static int
433	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
434	{
435	struct dirent *e;
436	int errorno;
437
438	pthread_mutex_lock (&readdirlock);
439
440	e = readdir (dirp);
441	errorno = errno;
442
443	if (e)
444	{
445	*res = ent;
446	strcpy (ent->d_name, e->d_name);
447	}
448	else
449	*res = 0;
450
451	pthread_mutex_unlock (&readdirlock);
452
453	errno = errorno;
454	return e ? 0 : -1;
455	}
456	#endif
457
458	/* sendfile always needs emulation */
459	static ssize_t
460	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
461	{
462	ssize_t res;
463
464	if (!count)
465	return 0;
466
467	#if HAVE_SENDFILE
468	# if __linux
469	res = sendfile (ofd, ifd, &offset, count);
470
471	# elif __freebsd
472	/*
473	* Of course, the freebsd sendfile is a dire hack with no thoughts
474	* wasted on making it similar to other I/O functions.
475	*/
476	{
477	off_t sbytes;
478	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
479
480	if (res < 0 && sbytes)
481	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
482	res = sbytes;
483	}
484
485	# elif __hpux
486	res = sendfile (ofd, ifd, offset, count, 0, 0);
487
488	# elif __solaris
489	{
490	struct sendfilevec vec;
491	size_t sbytes;
492
493	vec.sfv_fd = ifd;
494	vec.sfv_flag = 0;
495	vec.sfv_off = offset;
496	vec.sfv_len = count;
497
498	res = sendfilev (ofd, &vec, 1, &sbytes);
499
500	if (res < 0 && sbytes)
501	res = sbytes;
502	}
503
504	# endif
505	#else
506	res = -1;
507	errno = ENOSYS;
508	#endif
509
510	if (res < 0
511	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
512	#if __solaris
513	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
514	#endif
515	)
516	)
517	{
518	/* emulate sendfile. this is a major pain in the ass */
519	char buf[4096];
520	res = 0;
521
522	while (count)
523	{
524	ssize_t cnt;
525
526	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
527
528	if (cnt <= 0)
529	{
530	if (cnt && !res) res = -1;
531	break;
532	}
533
534	cnt = write (ofd, buf, cnt);
535
536	if (cnt <= 0)
537	{
538	if (cnt && !res) res = -1;
539	break;
540	}
541
542	offset += cnt;
543	res += cnt;
544	count -= cnt;
545	}
546	}
547
548	return res;
549	}
550
551	/* read a full directory */
552	static int
553	scandir_ (const char *path, void **namesp)
554	{
555	DIR *dirp = opendir (path);
556	union
557	{
558	struct dirent d;
559	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
560	} u;
561	struct dirent *entp;
562	char *name, *names;
563	int memlen = 4096;
564	int memofs = 0;
565	int res = 0;
566	int errorno;
567
568	if (!dirp)
569	return -1;
570
571	names = malloc (memlen);
572
573	for (;;)
574	{
575	errno = 0, readdir_r (dirp, &u.d, &entp);
576
577	if (!entp)
578	break;
579
580	name = entp->d_name;
581
582	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
583	{
584	int len = strlen (name) + 1;
585
586	res++;
587
588	while (memofs + len > memlen)
589	{
590	memlen *= 2;
591	names = realloc (names, memlen);
592	if (!names)
593	break;
594	}
595
596	memcpy (names + memofs, name, len);
597	memofs += len;
598	}
599	}
600
601	errorno = errno;
602	closedir (dirp);
603
604	if (errorno)
605	{
606	free (names);
607	errno = errorno;
608	res = -1;
609	}
610
611	*namesp = (void *)names;
612	return res;
613	}
614
615	/*****************************************************************************/
616
617	static void *
618	aio_proc (void *thr_arg)
619	{
620	aio_req req;
621	int type;
622
623	do
624	{
625	pthread_mutex_lock (&reqlock);
626
627	for (;;)
628	{
629	req = reqs;
630
631	if (reqs)
632	{
633	reqs = reqs->next;
634	if (!reqs) reqe = 0;
635	}
636
637	if (req)
638	break;
639
640	pthread_cond_wait (&reqwait, &reqlock);
641	}
642
643	pthread_mutex_unlock (&reqlock);
644
645	errno = 0; /* strictly unnecessary */
646
647	type = req->type;
648
649	switch (type)
650	{
651	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
652	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
653
654	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
655	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
656
657	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
658	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
659	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
660
661	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
662	case REQ_CLOSE: req->result = close (req->fd); break;
663	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
664	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
665	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
666
667	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
668	case REQ_FSYNC: req->result = fsync (req->fd); break;
669	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
670
671	case REQ_QUIT:
672	break;
673
674	default:
675	req->result = ENOSYS;
676	break;
677	}
678
679	req->errorno = errno;
680
681	pthread_mutex_lock (&reslock);
682
683	req->next = 0;
684
685	if (rese)
686	{
687	rese->next = req;
688	rese = req;
689	}
690	else
691	{
692	rese = ress = req;
693
694	/* write a dummy byte to the pipe so fh becomes ready */
695	write (respipe [1], &respipe, 1);
696	}
697
698	pthread_mutex_unlock (&reslock);
699	}
700	while (type != REQ_QUIT);
701
702	return 0;
703	}
704
705	/*****************************************************************************/
706
707	static void atfork_prepare (void)
708	{
709	pthread_mutex_lock (&reqlock);
710	pthread_mutex_lock (&reslock);
711	#if !HAVE_PREADWRITE
712	pthread_mutex_lock (&preadwritelock);
713	#endif
714	#if !HAVE_READDIR_R
715	pthread_mutex_lock (&readdirlock);
716	#endif
717	}
718
719	static void atfork_parent (void)
720	{
721	#if !HAVE_READDIR_R
722	pthread_mutex_unlock (&readdirlock);
723	#endif
724	#if !HAVE_PREADWRITE
725	pthread_mutex_unlock (&preadwritelock);
726	#endif
727	pthread_mutex_unlock (&reslock);
728	pthread_mutex_unlock (&reqlock);
729	}
730
731	static void atfork_child (void)
732	{
733	aio_req prv;
734
735	started = 0;
736
737	while (reqs)
738	{
739	prv = reqs;
740	reqs = prv->next;
741	free_req (prv);
742	}
743
744	reqs = reqe = 0;
745
746	while (ress)
747	{
748	prv = ress;
749	ress = prv->next;
750	free_req (prv);
751	}
752
753	ress = rese = 0;
754
755	close (respipe [0]);
756	close (respipe [1]);
757	create_pipe ();	541	create_respipe ();
758		542
759	atfork_parent ();	543	if (eio_init (want_poll, done_poll) < 0)
760	}	544	croak ("IO::AIO: unable to initialise eio library");
761		545
762	#define dREQ \	546	/* atfork child called in fifo order, so before eio's handler */
763	aio_req req; \	547	X_THREAD_ATFORK (0, 0, atfork_child);
764	\
765	if (SvOK (callback) && !SvROK (callback)) \
766	croak ("clalback must be undef or of reference type"); \
767	\
768	Newz (0, req, 1, aio_cb); \
769	if (!req) \
770	croak ("out of memory during aio_req allocation"); \
771	\
772	req->callback = newSVsv (callback);
773
774	MODULE = IO::AIO PACKAGE = IO::AIO
775
776	PROTOTYPES: ENABLE
777
778	BOOT:
779	{
780	create_pipe ();
781	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
782	}	548	}
783		549
784	void	550	void
785	min_parallel(nthreads)	551	max_poll_reqs (int nreqs)
786	int nthreads
787	PROTOTYPE: $	552	PROTOTYPE: $
		553	CODE:
		554	eio_set_max_poll_reqs (nreqs);
788		555
789	void	556	void
790	max_parallel(nthreads)	557	max_poll_time (double nseconds)
791	int nthreads
792	PROTOTYPE: $	558	PROTOTYPE: $
793
794	int
795	max_outstanding(nreqs)
796	int nreqs
797	PROTOTYPE: $
798	CODE:	559	CODE:
799	RETVAL = max_outstanding;	560	eio_set_max_poll_time (nseconds);
		561
		562	void
		563	min_parallel (int nthreads)
		564	PROTOTYPE: $
		565	CODE:
		566	eio_set_min_parallel (nthreads);
		567
		568	void
		569	max_parallel (int nthreads)
		570	PROTOTYPE: $
		571	CODE:
		572	eio_set_max_parallel (nthreads);
		573
		574	void
		575	max_idle (int nthreads)
		576	PROTOTYPE: $
		577	CODE:
		578	eio_set_max_idle (nthreads);
		579
		580	void
		581	max_outstanding (int maxreqs)
		582	PROTOTYPE: $
		583	CODE:
800	max_outstanding = nreqs;	584	max_outstanding = maxreqs;
801		585
802	void	586	void
803	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	587	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
804	SV * pathname
805	int flags
806	int mode
807	SV * callback
808	PROTOTYPE: $$$;$	588	PROTOTYPE: $$$;$
809	CODE:	589	PPCODE:
810	{	590	{
811	dREQ;	591	dREQ;
812		592
813	req->type = REQ_OPEN;	593	req->type = EIO_OPEN;
814	req->data = newSVsv (pathname);	594	req->sv1 = newSVsv (pathname);
815	req->dataptr = SvPVbyte_nolen (req->data);	595	req->ptr1 = SvPVbyte_nolen (req->sv1);
816	req->fd = flags;	596	req->int1 = flags;
817	req->mode = mode;	597	req->int2 = mode;
818		598
819	send_req (req);	599	REQ_SEND;
820	}	600	}
821		601
822	void	602	void
823	aio_close(fh,callback=&PL_sv_undef)	603	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
824	SV * fh
825	SV * callback
826	PROTOTYPE: $;$	604	PROTOTYPE: $;$
827	ALIAS:	605	ALIAS:
828	aio_close = REQ_CLOSE
829	aio_fsync = REQ_FSYNC	606	aio_fsync = EIO_FSYNC
830	aio_fdatasync = REQ_FDATASYNC	607	aio_fdatasync = EIO_FDATASYNC
831	CODE:	608	PPCODE:
832	{	609	{
		610	int fd = extract_fd (fh, 0);
833	dREQ;	611	dREQ;
834		612
835	req->type = ix;	613	req->type = ix;
836	req->fh = newSVsv (fh);	614	req->sv1 = newSVsv (fh);
837	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	615	req->int1 = fd;
838		616
839	send_req (req);	617	REQ_SEND (req);
840	}	618	}
841		619
842	void	620	void
		621	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		622	PROTOTYPE: $$$$;$
		623	PPCODE:
		624	{
		625	int fd = extract_fd (fh, 0);
		626	dREQ;
		627
		628	req->type = EIO_SYNC_FILE_RANGE;
		629	req->sv1 = newSVsv (fh);
		630	req->int1 = fd;
		631	req->offs = SvVAL64 (offset);
		632	req->size = SvVAL64 (nbytes);
		633	req->int2 = flags;
		634
		635	REQ_SEND (req);
		636	}
		637
		638	void
		639	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		640	PROTOTYPE: $;$
		641	PPCODE:
		642	{
		643	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		644	int fd = extract_fd (fh, 0);
		645	dREQ;
		646
		647	if (close_pipe < 0)
		648	{
		649	int pipefd [2];
		650
		651	if (pipe (pipefd) < 0
		652	|| close (pipefd [1]) < 0
		653	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		654	abort (); /*D*/
		655
		656	close_pipe = pipefd [0];
		657	}
		658
		659	req->type = EIO_DUP2;
		660	req->int1 = close_pipe;
		661	req->sv2 = newSVsv (fh);
		662	req->int2 = fd;
		663
		664	REQ_SEND (req);
		665	}
		666
		667	void
843	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	668	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
844	SV * fh
845	UV offset
846	UV length
847	SV * data
848	UV dataoffset
849	SV * callback
850	ALIAS:	669	ALIAS:
851	aio_read = REQ_READ	670	aio_read = EIO_READ
852	aio_write = REQ_WRITE	671	aio_write = EIO_WRITE
853	PROTOTYPE: $$$$$;$	672	PROTOTYPE: $$$$$;$
854	CODE:	673	PPCODE:
855	{	674	{
856	aio_req req;
857	STRLEN svlen;	675	STRLEN svlen;
		676	int fd = extract_fd (fh, ix == EIO_WRITE);
858	char *svptr = SvPVbyte (data, svlen);	677	char *svptr = SvPVbyte (data, svlen);
859		678	UV len = SvUV (length);
860	SvUPGRADE (data, SVt_PV);
861	SvPOK_on (data);
862		679
863	if (dataoffset < 0)	680	if (dataoffset < 0)
864	dataoffset += svlen;	681	dataoffset += svlen;
865		682
866	if (dataoffset < 0 || dataoffset > svlen)	683	if (dataoffset < 0 || dataoffset > svlen)
867	croak ("data offset outside of string");	684	croak ("dataoffset outside of data scalar");
868		685
869	if (ix == REQ_WRITE)	686	if (ix == EIO_WRITE)
870	{	687	{
871	/* write: check length and adjust. */	688	/* write: check length and adjust. */
872	if (length < 0 || length + dataoffset > svlen)	689	if (!SvOK (length) || len + dataoffset > svlen)
873	length = svlen - dataoffset;	690	len = svlen - dataoffset;
874	}	691	}
875	else	692	else
876	{	693	{
877	/* read: grow scalar as necessary */	694	/* read: check type and grow scalar as necessary */
		695	SvUPGRADE (data, SVt_PV);
878	svptr = SvGROW (data, length + dataoffset);	696	svptr = SvGROW (data, len + dataoffset + 1);
879	}	697	}
880		698
881	if (length < 0)	699	if (len < 0)
882	croak ("length must not be negative");	700	croak ("length must not be negative");
883		701
884	{	702	{
885	dREQ;	703	dREQ;
886		704
887	req->type = ix;	705	req->type = ix;
888	req->fh = newSVsv (fh);	706	req->sv1 = newSVsv (fh);
889	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	707	req->int1 = fd;
890	: IoOFP (sv_2io (fh)));	708	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
891	req->offset = offset;	709	req->size = len;
892	req->length = length;
893	req->data = SvREFCNT_inc (data);	710	req->sv2 = SvREFCNT_inc (data);
894	req->dataptr = (char *)svptr + dataoffset;	711	req->ptr2 = (char *)svptr + dataoffset;
		712	req->stroffset = dataoffset;
895		713
896	if (!SvREADONLY (data))	714	if (!SvREADONLY (data))
897	{	715	{
898	SvREADONLY_on (data);	716	SvREADONLY_on (data);
899	req->data2ptr = (void *)data;	717	req->flags |= FLAG_SV2_RO_OFF;
900	}	718	}
901		719
902	send_req (req);	720	REQ_SEND;
903	}	721	}
904	}	722	}
905		723
906	void	724	void
		725	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		726	PROTOTYPE: $$;$
		727	PPCODE:
		728	{
		729	SV *data;
		730	dREQ;
		731
		732	req->type = EIO_READLINK;
		733	req->sv1 = newSVsv (path);
		734	req->ptr1 = SvPVbyte_nolen (req->sv1);
		735
		736	REQ_SEND;
		737	}
		738
		739	void
907	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	740	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
908	SV * out_fh
909	SV * in_fh
910	UV in_offset
911	UV length
912	SV * callback
913	PROTOTYPE: $$$$;$	741	PROTOTYPE: $$$$;$
914	CODE:	742	PPCODE:
915	{	743	{
		744	int ifd = extract_fd (in_fh , 0);
		745	int ofd = extract_fd (out_fh, 0);
916	dREQ;	746	dREQ;
917		747
918	req->type = REQ_SENDFILE;	748	req->type = EIO_SENDFILE;
919	req->fh = newSVsv (out_fh);	749	req->sv1 = newSVsv (out_fh);
920	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	750	req->int1 = ofd;
921	req->fh2 = newSVsv (in_fh);	751	req->sv2 = newSVsv (in_fh);
922	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	752	req->int2 = ifd;
923	req->offset = in_offset;	753	req->offs = SvVAL64 (in_offset);
924	req->length = length;	754	req->size = length;
925		755
926	send_req (req);	756	REQ_SEND;
927	}	757	}
928		758
929	void	759	void
930	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	760	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
931	SV * fh
932	UV offset
933	IV length
934	SV * callback
935	PROTOTYPE: $$$;$	761	PROTOTYPE: $$$;$
936	CODE:	762	PPCODE:
937	{	763	{
		764	int fd = extract_fd (fh, 0);
938	dREQ;	765	dREQ;
939		766
940	req->type = REQ_READAHEAD;	767	req->type = EIO_READAHEAD;
941	req->fh = newSVsv (fh);	768	req->sv1 = newSVsv (fh);
942	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	769	req->int1 = fd;
943	req->offset = offset;	770	req->offs = SvVAL64 (offset);
944	req->length = length;	771	req->size = length;
945		772
946	send_req (req);	773	REQ_SEND;
947	}	774	}
948		775
949	void	776	void
950	aio_stat(fh_or_path,callback=&PL_sv_undef)	777	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
951	SV * fh_or_path
952	SV * callback
953	ALIAS:	778	ALIAS:
954	aio_stat = REQ_STAT	779	aio_stat = EIO_STAT
955	aio_lstat = REQ_LSTAT	780	aio_lstat = EIO_LSTAT
956	CODE:	781	PPCODE:
957	{	782	{
958	dREQ;	783	dREQ;
959		784
960	New (0, req->statdata, 1, Stat_t);	785	req->sv1 = newSVsv (fh_or_path);
961	if (!req->statdata)
962	{
963	free_req (req);
964	croak ("out of memory during aio_req->statdata allocation");
965	}
966		786
967	if (SvPOK (fh_or_path))	787	if (SvPOK (req->sv1))
968	{	788	{
969	req->type = ix;	789	req->type = ix;
970	req->data = newSVsv (fh_or_path);
971	req->dataptr = SvPVbyte_nolen (req->data);	790	req->ptr1 = SvPVbyte_nolen (req->sv1);
972	}	791	}
973	else	792	else
974	{	793	{
975	req->type = REQ_FSTAT;	794	req->type = EIO_FSTAT;
976	req->fh = newSVsv (fh_or_path);
977	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	795	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		796	}
		797
		798	REQ_SEND;
		799	}
		800
		801	void
		802	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		803	PPCODE:
		804	{
		805	dREQ;
		806
		807	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		808	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		809	req->sv1 = newSVsv (fh_or_path);
		810
		811	if (SvPOK (req->sv1))
978	}	812	{
		813	req->type = EIO_UTIME;
		814	req->ptr1 = SvPVbyte_nolen (req->sv1);
		815	}
		816	else
		817	{
		818	req->type = EIO_FUTIME;
		819	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		820	}
979		821
980	send_req (req);	822	REQ_SEND;
981	}	823	}
982		824
983	void	825	void
		826	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		827	PPCODE:
		828	{
		829	dREQ;
		830
		831	req->sv1 = newSVsv (fh_or_path);
		832	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		833
		834	if (SvPOK (req->sv1))
		835	{
		836	req->type = EIO_TRUNCATE;
		837	req->ptr1 = SvPVbyte_nolen (req->sv1);
		838	}
		839	else
		840	{
		841	req->type = EIO_FTRUNCATE;
		842	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		843	}
		844
		845	REQ_SEND;
		846	}
		847
		848	void
		849	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		850	ALIAS:
		851	aio_chmod = EIO_CHMOD
		852	aio_mkdir = EIO_MKDIR
		853	PPCODE:
		854	{
		855	dREQ;
		856
		857	req->int2 = mode;
		858	req->sv1 = newSVsv (fh_or_path);
		859
		860	if (SvPOK (req->sv1))
		861	{
		862	req->type = ix;
		863	req->ptr1 = SvPVbyte_nolen (req->sv1);
		864	}
		865	else
		866	{
		867	req->type = EIO_FCHMOD;
		868	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		869	}
		870
		871	REQ_SEND;
		872	}
		873
		874	void
		875	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		876	PPCODE:
		877	{
		878	dREQ;
		879
		880	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		881	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		882	req->sv1 = newSVsv (fh_or_path);
		883
		884	if (SvPOK (req->sv1))
		885	{
		886	req->type = EIO_CHOWN;
		887	req->ptr1 = SvPVbyte_nolen (req->sv1);
		888	}
		889	else
		890	{
		891	req->type = EIO_FCHOWN;
		892	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		893	}
		894
		895	REQ_SEND;
		896	}
		897
		898	void
984	aio_unlink(pathname,callback=&PL_sv_undef)	899	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
985	SV * pathname
986	SV * callback
987	ALIAS:	900	ALIAS:
988	aio_unlink = REQ_UNLINK	901	aio_unlink = EIO_UNLINK
989	aio_rmdir = REQ_RMDIR	902	aio_rmdir = EIO_RMDIR
		903	aio_readdir = EIO_READDIR
990	CODE:	904	PPCODE:
991	{	905	{
992	dREQ;	906	dREQ;
993		907
994	req->type = ix;	908	req->type = ix;
995	req->data = newSVsv (pathname);	909	req->sv1 = newSVsv (pathname);
996	req->dataptr = SvPVbyte_nolen (req->data);	910	req->ptr1 = SvPVbyte_nolen (req->sv1);
		911
		912	REQ_SEND;
		913	}
		914
		915	void
		916	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		917	ALIAS:
		918	aio_link = EIO_LINK
		919	aio_symlink = EIO_SYMLINK
		920	aio_rename = EIO_RENAME
		921	PPCODE:
		922	{
		923	dREQ;
997		924
998	send_req (req);	925	req->type = ix;
999	}	926	req->sv1 = newSVsv (oldpath);
1000		927	req->ptr1 = SvPVbyte_nolen (req->sv1);
1001	void	928	req->sv2 = newSVsv (newpath);
1002	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	929	req->ptr2 = SvPVbyte_nolen (req->sv2);
1003	SV * oldpath
1004	SV * newpath
1005	SV * callback
1006	CODE:
1007	{
1008	dREQ;
1009		930
1010	req->type = REQ_SYMLINK;	931	REQ_SEND;
1011	req->fh = newSVsv (oldpath);	932	}
1012	req->data2ptr = SvPVbyte_nolen (req->fh);	933
1013	req->data = newSVsv (newpath);	934	void
1014	req->dataptr = SvPVbyte_nolen (req->data);	935	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		936	PPCODE:
		937	{
		938	dREQ;
1015		939
1016	send_req (req);	940	req->type = EIO_MKNOD;
1017	}	941	req->sv1 = newSVsv (pathname);
1018		942	req->ptr1 = SvPVbyte_nolen (req->sv1);
1019	void	943	req->int2 = (mode_t)mode;
1020	aio_readdir(pathname,callback=&PL_sv_undef)	944	req->offs = dev;
1021	SV * pathname
1022	SV * callback
1023	CODE:
1024	{
1025	dREQ;
1026		945
		946	REQ_SEND;
		947	}
		948
		949	void
		950	aio_busy (double delay, SV *callback=&PL_sv_undef)
		951	PPCODE:
		952	{
		953	dREQ;
		954
		955	req->type = EIO_BUSY;
		956	req->nv1 = delay < 0. ? 0. : delay;
		957
		958	REQ_SEND;
		959	}
		960
		961	void
		962	aio_group (SV *callback=&PL_sv_undef)
		963	PROTOTYPE: ;$
		964	PPCODE:
		965	{
		966	dREQ;
		967
		968	req->type = EIO_GROUP;
		969
		970	req_submit (req);
		971	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		972	}
		973
		974	void
		975	aio_nop (SV *callback=&PL_sv_undef)
		976	ALIAS:
		977	aio_nop = EIO_NOP
		978	aio_sync = EIO_SYNC
		979	PPCODE:
		980	{
		981	dREQ;
		982
1027	req->type = REQ_READDIR;	983	req->type = ix;
1028	req->data = newSVsv (pathname);
1029	req->dataptr = SvPVbyte_nolen (req->data);
1030
1031	send_req (req);
1032	}
1033		984
		985	REQ_SEND;
		986	}
		987
		988	int
		989	aioreq_pri (int pri = 0)
		990	PROTOTYPE: ;$
		991	CODE:
		992	RETVAL = next_pri;
		993	if (items > 0)
		994	{
		995	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		996	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		997	next_pri = pri;
		998	}
		999	OUTPUT:
		1000	RETVAL
		1001
1034	void	1002	void
		1003	aioreq_nice (int nice = 0)
		1004	CODE:
		1005	nice = next_pri - nice;
		1006	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1007	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1008	next_pri = nice;
		1009
		1010	void
1035	flush()	1011	flush ()
1036	PROTOTYPE:	1012	PROTOTYPE:
1037	CODE:	1013	CODE:
1038	while (nreqs)	1014	while (eio_nreqs ())
1039	{	1015	{
1040	poll_wait ();	1016	poll_wait ();
1041	poll_cb ();	1017	poll_cb ();
1042	}	1018	}
1043		1019
1044	void	1020	int
1045	poll()	1021	poll()
1046	PROTOTYPE:	1022	PROTOTYPE:
1047	CODE:	1023	CODE:
1048	if (nreqs)
1049	{
1050	poll_wait ();	1024	poll_wait ();
1051	poll_cb ();	1025	RETVAL = poll_cb ();
1052	}	1026	OUTPUT:
		1027	RETVAL
1053		1028
1054	int	1029	int
1055	poll_fileno()	1030	poll_fileno()
1056	PROTOTYPE:	1031	PROTOTYPE:
1057	CODE:	1032	CODE:
…		…
1069		1044
1070	void	1045	void
1071	poll_wait()	1046	poll_wait()
1072	PROTOTYPE:	1047	PROTOTYPE:
1073	CODE:	1048	CODE:
1074	if (nreqs)
1075	poll_wait ();	1049	poll_wait ();
1076		1050
1077	int	1051	int
1078	nreqs()	1052	nreqs()
1079	PROTOTYPE:	1053	PROTOTYPE:
1080	CODE:	1054	CODE:
1081	RETVAL = nreqs;	1055	RETVAL = eio_nreqs ();
1082	OUTPUT:	1056	OUTPUT:
1083	RETVAL	1057	RETVAL
1084		1058
		1059	int
		1060	nready()
		1061	PROTOTYPE:
		1062	CODE:
		1063	RETVAL = eio_nready ();
		1064	OUTPUT:
		1065	RETVAL
		1066
		1067	int
		1068	npending()
		1069	PROTOTYPE:
		1070	CODE:
		1071	RETVAL = eio_npending ();
		1072	OUTPUT:
		1073	RETVAL
		1074
		1075	int
		1076	nthreads()
		1077	PROTOTYPE:
		1078	CODE:
		1079	RETVAL = eio_nthreads ();
		1080	OUTPUT:
		1081	RETVAL
		1082
		1083	void _on_next_submit (SV *cb)
		1084	CODE:
		1085	SvREFCNT_dec (on_next_submit);
		1086	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1087
		1088	PROTOTYPES: DISABLE
		1089
		1090	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1091
		1092	void
		1093	cancel (aio_req_ornot req)
		1094	CODE:
		1095	eio_cancel (req);
		1096
		1097	void
		1098	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1099	PPCODE:
		1100	{
		1101	if (GIMME_V != G_VOID)
		1102	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1103
		1104	if (items > 1)
		1105	{
		1106	SV *cb_cv = get_cb (callback);
		1107
		1108	SvREFCNT_dec (req->callback);
		1109	req->callback = SvREFCNT_inc (cb_cv);
		1110	}
		1111	}
		1112
		1113	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1114
		1115	void
		1116	add (aio_req grp, ...)
		1117	PPCODE:
		1118	{
		1119	int i;
		1120
		1121	if (grp->int1 == 2)
		1122	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1123
		1124	for (i = 1; i < items; ++i )
		1125	{
		1126	aio_req req;
		1127
		1128	if (GIMME_V != G_VOID)
		1129	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1130
		1131	req = SvAIO_REQ (ST (i));
		1132
		1133	if (req)
		1134	eio_grp_add (grp, req);
		1135	}
		1136	}
		1137
		1138	void
		1139	cancel_subs (aio_req_ornot req)
		1140	CODE:
		1141	req_cancel_subs (req);
		1142
		1143	void
		1144	result (aio_req grp, ...)
		1145	CODE:
		1146	{
		1147	int i;
		1148	AV *av;
		1149
		1150	grp->errorno = errno;
		1151
		1152	av = newAV ();
		1153
		1154	for (i = 1; i < items; ++i )
		1155	av_push (av, newSVsv (ST (i)));
		1156
		1157	SvREFCNT_dec (grp->sv1);
		1158	grp->sv1 = (SV *)av;
		1159	}
		1160
		1161	void
		1162	errno (aio_req grp, int errorno = errno)
		1163	CODE:
		1164	grp->errorno = errorno;
		1165
		1166	void
		1167	limit (aio_req grp, int limit)
		1168	CODE:
		1169	eio_grp_limit (grp, limit);
		1170
		1171	void
		1172	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1173	CODE:
		1174	{
		1175	SvREFCNT_dec (grp->sv2);
		1176	grp->sv2 = newSVsv (callback);
		1177	grp->feed = aio_grp_feed;
		1178
		1179	if (grp->int2 <= 0)
		1180	grp->int2 = 2;
		1181
		1182	eio_grp_limit (grp, grp->int2);
		1183	}
		1184

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