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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.37 by root, Tue Aug 23 12:37:19 2005 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>
		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 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
42	enum {	121	enum {
43	REQ_QUIT,	122	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	};	123	};
53		124
54	typedef struct aio_cb {	125	#include "libeio/eio.c"
55	struct aio_cb *volatile next;
56		126
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;	127	typedef eio_req *aio_req;
		128	typedef eio_req *aio_req_ornot;
75		129
76	static int started, wanted;	130	static SV *on_next_submit;
77	static volatile int nreqs;	131	static int next_pri = EIO_PRI_DEFAULT;
78	static int max_outstanding = 1<<30;	132	static int max_outstanding;
79	static int respipe [2];
80		133
81	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	134	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		135
85	static volatile aio_req reqs, reqe; /* queue start, queue end */	136	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)	137	static void req_cancel (aio_req req);
89	{
90	if (req->data)
91	SvREFCNT_dec (req->data);
92		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	{
93	if (req->fh)	351	if (req->self)
		352	{
		353	sv_unmagic (req->self, PERL_MAGIC_ext);
94	SvREFCNT_dec (req->fh);	354	SvREFCNT_dec (req->self);
		355	}
95		356
96	if (req->fh2)	357	SvREFCNT_dec (req->sv1);
97	SvREFCNT_dec (req->fh2);	358	SvREFCNT_dec (req->sv2);
98
99	if (req->statdata)
100	Safefree (req->statdata);
101
102	if (req->callback)
103	SvREFCNT_dec (req->callback);	359	SvREFCNT_dec (req->callback);
104
105	if (req->type == REQ_READDIR && req->result >= 0)
106	free (req->data2ptr);
107		360
108	Safefree (req);	361	Safefree (req);
109	}	362	}
110		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
111	static void	383	static void
112	poll_wait ()	384	create_respipe (void)
113	{	385	{
114	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)
115	{	399	{
116	fd_set rfd;	400	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
117	FD_ZERO(&rfd);	401	croak ("unable to initialize result pipe(2)");
118	FD_SET(respipe [0], &rfd);
119		402
120	select (respipe [0] + 1, &rfd, 0, 0, 0);	403	respipe_close (respipe [0]);
		404	respipe [0] = old_readfd;
121	}	405	}
122	}
123		406
124	static int	407	#ifdef _WIN32
125	poll_cb ()	408	int arg = 1;
126	{	409	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
127	dSP;	410	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
128	int count = 0;	411	#else
129	int do_croak = 0;	412	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
130	aio_req req;	413	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		414	#endif
		415	croak ("unable to initialize result pipe(3)");
131		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	{
132	for (;;)	447	for (;;)
133	{	448	{
134	pthread_mutex_lock (&reslock);	449	int res = eio_poll ();
135	req = ress;
136		450
137	if (req)	451	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);	452	croak (0);
235	}
236	}
237		453
238	LEAVE;	454	if (!max_outstanding || max_outstanding > eio_nreqs ())
		455	return res;
239		456
240	errno = errorno;	457	poll_wait ();
241	count++;
242	}
243
244	free_req (req);
245	}	458	}
246
247	return count;
248	}
249
250	static void *aio_proc(void *arg);
251
252	static void
253	start_thread (void)
254	{
255	sigset_t fullsigset, oldsigset;
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	}
271
272	static void
273	send_req (aio_req req)
274	{
275	while (started < wanted && nreqs >= started)
276	start_thread ();
277
278	nreqs++;
279
280	pthread_mutex_lock (&reqlock);
281
282	req->next = 0;
283
284	if (reqe)
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	}
306
307	static void
308	end_thread (void)
309	{
310	aio_req req;
311	Newz (0, req, 1, aio_cb);
312	req->type = REQ_QUIT;
313
314	send_req (req);
315	}
316
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
370	pread (int fd, void *buf, size_t count, off_t offset)
371	{
372	ssize_t res;
373	off_t ooffset;
374
375	pthread_mutex_lock (&preadwritelock);
376	ooffset = lseek (fd, 0, SEEK_CUR);
377	lseek (fd, offset, SEEK_SET);
378	res = read (fd, buf, count);
379	lseek (fd, ooffset, SEEK_SET);
380	pthread_mutex_unlock (&preadwritelock);
381
382	return res;
383	}
384
385	static ssize_t
386	pwrite (int fd, void *buf, size_t count, off_t offset)
387	{
388	ssize_t res;
389	off_t ooffset;
390
391	pthread_mutex_lock (&preadwritelock);
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
398	return res;
399	}
400	#endif
401
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	# else
505	res = -1;
506	errno = ENOSYS;
507	# endif
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	for (;;)
523	{
524	ssize_t cnt;
525
526	cnt = pread (ifd, buf, 4096, 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	}
545	}
546
547	return res;
548	}
549
550	/* read a full directory */
551	static int
552	scandir_ (const char *path, void **namesp)
553	{
554	DIR *dirp = opendir (path);
555	union
556	{
557	struct dirent d;
558	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
559	} u;
560	struct dirent *entp;
561	char *name, *names;
562	int memlen = 4096;
563	int memofs = 0;
564	int res = 0;
565	int errorno;
566
567	if (!dirp)
568	return -1;
569
570	names = malloc (memlen);
571
572	for (;;)
573	{
574	errno = 0, readdir_r (dirp, &u.d, &entp);
575
576	if (!entp)
577	break;
578
579	name = entp->d_name;
580
581	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
582	{
583	int len = strlen (name) + 1;
584
585	res++;
586
587	while (memofs + len > memlen)
588	{
589	memlen *= 2;
590	names = realloc (names, memlen);
591	if (!names)
592	break;
593	}
594
595	memcpy (names + memofs, name, len);
596	memofs += len;
597	}
598	}
599
600	errorno = errno;
601	closedir (dirp);
602
603	if (errorno)
604	{
605	free (names);
606	errno = errorno;
607	res = -1;
608	}
609
610	*namesp = (void *)names;
611	return res;
612	}
613
614	/*****************************************************************************/
615
616	static void *
617	aio_proc (void *thr_arg)
618	{
619	aio_req req;
620	int type;
621
622	do
623	{
624	pthread_mutex_lock (&reqlock);
625
626	for (;;)
627	{
628	req = reqs;
629
630	if (reqs)
631	{
632	reqs = reqs->next;
633	if (!reqs) reqe = 0;
634	}
635
636	if (req)
637	break;
638
639	pthread_cond_wait (&reqwait, &reqlock);
640	}
641
642	pthread_mutex_unlock (&reqlock);
643
644	errno = 0; /* strictly unnecessary */
645
646	type = req->type;
647
648	switch (type)
649	{
650	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
651	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
652
653	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
654	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
655
656	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
657	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
658	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
659
660	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
661	case REQ_CLOSE: req->result = close (req->fd); break;
662	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
663	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
664	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
665
666	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
667	case REQ_FSYNC: req->result = fsync (req->fd); break;
668	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
669
670	case REQ_QUIT:
671	break;
672
673	default:
674	req->result = ENOSYS;
675	break;
676	}
677
678	req->errorno = errno;
679
680	pthread_mutex_lock (&reslock);
681
682	req->next = 0;
683
684	if (rese)
685	{
686	rese->next = req;
687	rese = req;
688	}
689	else
690	{
691	rese = ress = req;
692
693	/* write a dummy byte to the pipe so fh becomes ready */
694	write (respipe [1], &respipe, 1);
695	}
696
697	pthread_mutex_unlock (&reslock);
698	}
699	while (type != REQ_QUIT);
700
701	return 0;
702	}
703
704	/*****************************************************************************/
705
706	static void atfork_prepare (void)
707	{
708	pthread_mutex_lock (&reqlock);
709	pthread_mutex_lock (&reslock);
710	#if !HAVE_PREADWRITE
711	pthread_mutex_lock (&preadwritelock);
712	#endif
713	#if !HAVE_READDIR_R
714	pthread_mutex_lock (&readdirlock);
715	#endif
716	}
717
718	static void atfork_parent (void)
719	{
720	#if !HAVE_READDIR_R
721	pthread_mutex_unlock (&readdirlock);
722	#endif
723	#if !HAVE_PREADWRITE
724	pthread_mutex_unlock (&preadwritelock);
725	#endif
726	pthread_mutex_unlock (&reslock);
727	pthread_mutex_unlock (&reqlock);
728	}	459	}
729		460
730	static void atfork_child (void)	461	static void atfork_child (void)
731	{	462	{
732	aio_req prv;
733
734	started = 0;
735
736	while (reqs)
737	{
738	prv = reqs;
739	reqs = prv->next;
740	free_req (prv);
741	}
742
743	reqs = reqe = 0;
744
745	while (ress)
746	{
747	prv = ress;
748	ress = prv->next;
749	free_req (prv);
750	}
751
752	ress = rese = 0;
753
754	close (respipe [0]);
755	close (respipe [1]);
756	create_pipe ();	463	create_respipe ();
757
758	atfork_parent ();
759	}	464	}
760		465
761	#define dREQ \	466	#define dREQ \
762	aio_req req; \	467	aio_req req; \
		468	int req_pri = next_pri; \
		469	next_pri = EIO_PRI_DEFAULT; \
763	\	470	\
764	if (SvOK (callback) && !SvROK (callback)) \	471	if (SvOK (callback) && !SvROK (callback)) \
765	croak ("clalback must be undef or of reference type"); \	472	croak ("callback must be undef or of reference type"); \
766	\	473	\
767	Newz (0, req, 1, aio_cb); \	474	Newz (0, req, 1, eio_req); \
768	if (!req) \	475	if (!req) \
769	croak ("out of memory during aio_req allocation"); \	476	croak ("out of memory during eio_req allocation"); \
770	\	477	\
771	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));
772		488
773	MODULE = IO::AIO PACKAGE = IO::AIO	489	MODULE = IO::AIO PACKAGE = IO::AIO
774		490
775	PROTOTYPES: ENABLE	491	PROTOTYPES: ENABLE
776		492
777	BOOT:	493	BOOT:
778	{	494	{
779	create_pipe ();	495	stash = gv_stashpv ("IO::AIO", 1);
780	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
781	}
782		496
		497	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		498	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		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
		505
		506	create_respipe ();
		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
783	void	515	void
784	min_parallel(nthreads)	516	max_poll_reqs (int nreqs)
785	int nthreads
786	PROTOTYPE: $	517	PROTOTYPE: $
		518	CODE:
		519	eio_set_max_poll_reqs (nreqs);
787		520
788	void	521	void
789	max_parallel(nthreads)	522	max_poll_time (double nseconds)
790	int nthreads
791	PROTOTYPE: $	523	PROTOTYPE: $
792
793	int
794	max_outstanding(nreqs)
795	int nreqs
796	PROTOTYPE: $
797	CODE:	524	CODE:
798	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:
799	max_outstanding = nreqs;	549	max_outstanding = maxreqs;
800		550
801	void	551	void
802	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	552	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
803	SV * pathname
804	int flags
805	int mode
806	SV * callback
807	PROTOTYPE: $$$;$	553	PROTOTYPE: $$$;$
808	CODE:	554	PPCODE:
809	{	555	{
810	dREQ;	556	dREQ;
811		557
812	req->type = REQ_OPEN;	558	req->type = EIO_OPEN;
813	req->data = newSVsv (pathname);	559	req->sv1 = newSVsv (pathname);
814	req->dataptr = SvPVbyte_nolen (req->data);	560	req->ptr1 = SvPVbyte_nolen (req->sv1);
815	req->fd = flags;	561	req->int1 = flags;
816	req->mode = mode;	562	req->int2 = mode;
817		563
818	send_req (req);	564	REQ_SEND;
819	}	565	}
820		566
821	void	567	void
822	aio_close(fh,callback=&PL_sv_undef)	568	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
823	SV * fh
824	SV * callback
825	PROTOTYPE: $;$	569	PROTOTYPE: $;$
826	ALIAS:	570	ALIAS:
827	aio_close = REQ_CLOSE
828	aio_fsync = REQ_FSYNC	571	aio_fsync = EIO_FSYNC
829	aio_fdatasync = REQ_FDATASYNC	572	aio_fdatasync = EIO_FDATASYNC
830	CODE:	573	PPCODE:
831	{	574	{
832	dREQ;	575	dREQ;
833		576
834	req->type = ix;	577	req->type = ix;
835	req->fh = newSVsv (fh);	578	req->sv1 = newSVsv (fh);
836	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	579	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
837		580
838	send_req (req);	581	REQ_SEND (req);
839	}	582	}
840		583
841	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
842	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)
843	SV * fh
844	UV offset
845	UV length
846	SV * data
847	UV dataoffset
848	SV * callback
849	ALIAS:	614	ALIAS:
850	aio_read = REQ_READ	615	aio_read = EIO_READ
851	aio_write = REQ_WRITE	616	aio_write = EIO_WRITE
852	PROTOTYPE: $$$$$;$	617	PROTOTYPE: $$$$$;$
853	CODE:	618	PPCODE:
854	{	619	{
855	aio_req req;
856	STRLEN svlen;	620	STRLEN svlen;
857	char *svptr = SvPVbyte (data, svlen);	621	char *svptr = SvPVbyte (data, svlen);
		622	UV len = SvUV (length);
858		623
859	SvUPGRADE (data, SVt_PV);	624	SvUPGRADE (data, SVt_PV);
860	SvPOK_on (data);	625	SvPOK_on (data);
861		626
862	if (dataoffset < 0)	627	if (dataoffset < 0)
863	dataoffset += svlen;	628	dataoffset += svlen;
864		629
865	if (dataoffset < 0 || dataoffset > svlen)	630	if (dataoffset < 0 || dataoffset > svlen)
866	croak ("data offset outside of string");	631	croak ("dataoffset outside of data scalar");
867		632
868	if (ix == REQ_WRITE)	633	if (ix == EIO_WRITE)
869	{	634	{
870	/* write: check length and adjust. */	635	/* write: check length and adjust. */
871	if (length < 0 || length + dataoffset > svlen)	636	if (!SvOK (length) || len + dataoffset > svlen)
872	length = svlen - dataoffset;	637	len = svlen - dataoffset;
873	}	638	}
874	else	639	else
875	{	640	{
876	/* read: grow scalar as necessary */	641	/* read: grow scalar as necessary */
877	svptr = SvGROW (data, length + dataoffset);	642	svptr = SvGROW (data, len + dataoffset + 1);
878	}	643	}
879		644
880	if (length < 0)	645	if (len < 0)
881	croak ("length must not be negative");	646	croak ("length must not be negative");
882		647
883	{	648	{
884	dREQ;	649	dREQ;
885		650
886	req->type = ix;	651	req->type = ix;
887	req->fh = newSVsv (fh);	652	req->sv1 = newSVsv (fh);
888	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	653	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
889	: IoOFP (sv_2io (fh)));	654	: IoOFP (sv_2io (fh)));
		655	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
890	req->offset = offset;	656	req->size = len;
891	req->length = length;
892	req->data = SvREFCNT_inc (data);	657	req->sv2 = SvREFCNT_inc (data);
893	req->dataptr = (char *)svptr + dataoffset;	658	req->ptr2 = (char *)svptr + dataoffset;
		659	req->stroffset = dataoffset;
894		660
895	if (!SvREADONLY (data))	661	if (!SvREADONLY (data))
896	{	662	{
897	SvREADONLY_on (data);	663	SvREADONLY_on (data);
898	req->data2ptr = (void *)data;	664	req->flags |= FLAG_SV2_RO_OFF;
899	}	665	}
900		666
901	send_req (req);	667	REQ_SEND;
902	}	668	}
903	}	669	}
904		670
905	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
906	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)
907	SV * out_fh
908	SV * in_fh
909	UV in_offset
910	UV length
911	SV * callback
912	PROTOTYPE: $$$$;$	688	PROTOTYPE: $$$$;$
913	CODE:	689	PPCODE:
914	{	690	{
915	dREQ;	691	dREQ;
916		692
917	req->type = REQ_SENDFILE;	693	req->type = EIO_SENDFILE;
918	req->fh = newSVsv (out_fh);	694	req->sv1 = newSVsv (out_fh);
919	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	695	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
920	req->fh2 = newSVsv (in_fh);	696	req->sv2 = newSVsv (in_fh);
921	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	697	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
922	req->offset = in_offset;	698	req->offs = SvVAL64 (in_offset);
923	req->length = length;	699	req->size = length;
924		700
925	send_req (req);	701	REQ_SEND;
926	}	702	}
927		703
928	void	704	void
929	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	705	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
930	SV * fh
931	UV offset
932	IV length
933	SV * callback
934	PROTOTYPE: $$$;$	706	PROTOTYPE: $$$;$
935	CODE:	707	PPCODE:
936	{	708	{
937	dREQ;	709	dREQ;
938		710
939	req->type = REQ_READAHEAD;	711	req->type = EIO_READAHEAD;
940	req->fh = newSVsv (fh);	712	req->sv1 = newSVsv (fh);
941	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	713	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
942	req->offset = offset;	714	req->offs = SvVAL64 (offset);
943	req->length = length;	715	req->size = length;
944		716
945	send_req (req);	717	REQ_SEND;
946	}	718	}
947		719
948	void	720	void
949	aio_stat(fh_or_path,callback=&PL_sv_undef)	721	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
950	SV * fh_or_path
951	SV * callback
952	ALIAS:	722	ALIAS:
953	aio_stat = REQ_STAT	723	aio_stat = EIO_STAT
954	aio_lstat = REQ_LSTAT	724	aio_lstat = EIO_LSTAT
955	CODE:	725	PPCODE:
956	{	726	{
957	dREQ;	727	dREQ;
958		728
959	New (0, req->statdata, 1, Stat_t);	729	req->sv1 = newSVsv (fh_or_path);
960	if (!req->statdata)
961	{
962	free_req (req);
963	croak ("out of memory during aio_req->statdata allocation");
964	}
965		730
966	if (SvPOK (fh_or_path))	731	if (SvPOK (req->sv1))
967	{	732	{
968	req->type = ix;	733	req->type = ix;
969	req->data = newSVsv (fh_or_path);
970	req->dataptr = SvPVbyte_nolen (req->data);	734	req->ptr1 = SvPVbyte_nolen (req->sv1);
971	}	735	}
972	else	736	else
973	{	737	{
974	req->type = REQ_FSTAT;	738	req->type = EIO_FSTAT;
975	req->fh = newSVsv (fh_or_path);
976	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))
977	}	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	}
978		765
979	send_req (req);	766	REQ_SEND;
980	}	767	}
981		768
982	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
983	aio_unlink(pathname,callback=&PL_sv_undef)	843	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
984	SV * pathname
985	SV * callback
986	ALIAS:	844	ALIAS:
987	aio_unlink = REQ_UNLINK	845	aio_unlink = EIO_UNLINK
988	aio_rmdir = REQ_RMDIR	846	aio_rmdir = EIO_RMDIR
		847	aio_readdir = EIO_READDIR
989	CODE:	848	PPCODE:
990	{	849	{
991	dREQ;	850	dREQ;
992		851
993	req->type = ix;	852	req->type = ix;
994	req->data = newSVsv (pathname);	853	req->sv1 = newSVsv (pathname);
995	req->dataptr = SvPVbyte_nolen (req->data);	854	req->ptr1 = SvPVbyte_nolen (req->sv1);
		855
		856	REQ_SEND;
		857	}
		858
		859	void
		860	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		861	ALIAS:
		862	aio_link = EIO_LINK
		863	aio_symlink = EIO_SYMLINK
		864	aio_rename = EIO_RENAME
		865	PPCODE:
		866	{
		867	dREQ;
996		868
997	send_req (req);	869	req->type = ix;
998	}	870	req->sv1 = newSVsv (oldpath);
999		871	req->ptr1 = SvPVbyte_nolen (req->sv1);
1000	void	872	req->sv2 = newSVsv (newpath);
1001	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	873	req->ptr2 = SvPVbyte_nolen (req->sv2);
1002	SV * oldpath
1003	SV * newpath
1004	SV * callback
1005	CODE:
1006	{
1007	dREQ;
1008		874
1009	req->type = REQ_SYMLINK;	875	REQ_SEND;
1010	req->fh = newSVsv (oldpath);	876	}
1011	req->data2ptr = SvPVbyte_nolen (req->fh);	877
1012	req->data = newSVsv (newpath);	878	void
1013	req->dataptr = SvPVbyte_nolen (req->data);	879	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		880	PPCODE:
		881	{
		882	dREQ;
1014		883
1015	send_req (req);	884	req->type = EIO_MKNOD;
1016	}	885	req->sv1 = newSVsv (pathname);
1017		886	req->ptr1 = SvPVbyte_nolen (req->sv1);
1018	void	887	req->int2 = (mode_t)mode;
1019	aio_readdir(pathname,callback=&PL_sv_undef)	888	req->offs = dev;
1020	SV * pathname
1021	SV * callback
1022	CODE:
1023	{
1024	dREQ;
1025		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
1026	req->type = REQ_READDIR;	927	req->type = ix;
1027	req->data = newSVsv (pathname);
1028	req->dataptr = SvPVbyte_nolen (req->data);
1029
1030	send_req (req);
1031	}
1032		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
1033	void	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;
		953
		954	void
1034	flush()	955	flush ()
1035	PROTOTYPE:	956	PROTOTYPE:
1036	CODE:	957	CODE:
1037	while (nreqs)	958	while (eio_nreqs ())
1038	{	959	{
1039	poll_wait ();	960	poll_wait ();
1040	poll_cb ();	961	poll_cb ();
1041	}	962	}
1042		963
1043	void	964	int
1044	poll()	965	poll()
1045	PROTOTYPE:	966	PROTOTYPE:
1046	CODE:	967	CODE:
1047	if (nreqs)
1048	{
1049	poll_wait ();	968	poll_wait ();
1050	poll_cb ();	969	RETVAL = poll_cb ();
1051	}	970	OUTPUT:
		971	RETVAL
1052		972
1053	int	973	int
1054	poll_fileno()	974	poll_fileno()
1055	PROTOTYPE:	975	PROTOTYPE:
1056	CODE:	976	CODE:
…		…
1068		988
1069	void	989	void
1070	poll_wait()	990	poll_wait()
1071	PROTOTYPE:	991	PROTOTYPE:
1072	CODE:	992	CODE:
1073	if (nreqs)
1074	poll_wait ();	993	poll_wait ();
1075		994
1076	int	995	int
1077	nreqs()	996	nreqs()
1078	PROTOTYPE:	997	PROTOTYPE:
1079	CODE:	998	CODE:
1080	RETVAL = nreqs;	999	RETVAL = eio_nreqs ();
1081	OUTPUT:	1000	OUTPUT:
1082	RETVAL	1001	RETVAL
1083		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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