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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.65 by root, Tue Oct 24 00:26:32 2006 UTC vs.
Revision 1.126 by root, Thu Sep 25 07:56:07 2008 UTC

1	#if __linux	1	#include "libeio/xthread.h"
2	# define _GNU_SOURCE
3	#endif
4
5	#define _REENTRANT 1
6		2
7	#include <errno.h>	3	#include <errno.h>
8		4
9	#include "EXTERN.h"	5	#include "EXTERN.h"
10	#include "perl.h"	6	#include "perl.h"
11	#include "XSUB.h"	7	#include "XSUB.h"
12		8
13	#include "autoconf/config.h"
14
15	#include <pthread.h>
16
17	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
18	#include <errno.h>	11	#include <errno.h>
19	#include <sys/time.h>
20	#include <sys/select.h>
21	#include <sys/types.h>	12	#include <sys/types.h>
22	#include <sys/stat.h>	13	#include <sys/stat.h>
23	#include <limits.h>	14	#include <limits.h>
24	#include <unistd.h>
25	#include <fcntl.h>	15	#include <fcntl.h>
26	#include <signal.h>
27	#include <sched.h>	16	#include <sched.h>
28		17
29	#if HAVE_SENDFILE	18	/* perl namespace pollution */
30	# if __linux	19	#undef VERSION
31	# include <sys/sendfile.h>	20
32	# elif __freebsd	21	#ifdef _WIN32
33	# include <sys/socket.h>	22
34	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
35	# elif __hpux	24	# undef malloc
36	# include <sys/socket.h>	25	# undef free
37	# elif __solaris /* not yet */	26
38	# 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
39	# else	59	#else
40	# error sendfile support requested but not available	60
41	# 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
42	#endif	68	#endif
43		69
44	/* used for struct dirent, AIX doesn't provide it */	70	/* perl stupidly overrides readdir and maybe others */
45	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
46	# 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
47	#endif	83	#endif
48		84
49	#if __ia64	85	static HV *stash;
50	# define STACKSIZE 65536	86	typedef SV SV8; /* byte-sv, used for argument-checking */
51	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
52	# define STACKSIZE PTHREAD_STACK_MIN
53	#else
54	# define STACKSIZE 16384
55	#endif
56
57	/* buffer size for various temporary buffers */
58	#define AIO_BUFSIZE 65536
59
60	#define dBUF \
61	char *aio_buf = malloc (AIO_BUFSIZE); \
62	if (!aio_buf) \
63	return -1;
64
65	#define fBUF free (aio_buf)
66
67	enum {
68	REQ_QUIT,
69	REQ_OPEN, REQ_CLOSE,
70	REQ_READ, REQ_WRITE, REQ_READAHEAD,
71	REQ_SENDFILE,
72	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
73	REQ_FSYNC, REQ_FDATASYNC,
74	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
75	REQ_READDIR,
76	REQ_LINK, REQ_SYMLINK,
77	REQ_GROUP, REQ_NOP,
78	REQ_SLEEP,
79	};
80		87
81	#define AIO_REQ_KLASS "IO::AIO::REQ"	88	#define AIO_REQ_KLASS "IO::AIO::REQ"
82	#define AIO_GRP_KLASS "IO::AIO::GRP"	89	#define AIO_GRP_KLASS "IO::AIO::GRP"
83		90
84	typedef struct aio_cb	91	#define EIO_REQ_MEMBERS \
85	{
86	struct aio_cb *volatile next;
87
88	SV *data, *callback;	92	SV *callback; \
89	SV *fh, *fh2;	93	SV *sv1, *sv2; \
90	void *dataptr, *data2ptr;
91	Stat_t *statdata;
92	off_t offset;
93	size_t length;
94	ssize_t result;
95
96	STRLEN dataoffset;	94	STRLEN stroffset; \
97	int type;	95	SV *self;
98	int fd, fd2;
99	int errorno;
100	mode_t mode; /* open */
101		96
102	unsigned char flags;	97	#define EIO_NO_WRAPPERS 1
103	unsigned char pri;
104		98
105	SV *self; /* the perl counterpart of this request, if any */	99	#include "libeio/eio.h"
106	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	100
107	} aio_cb;	101	static int req_invoke (eio_req *req);
		102	#define EIO_FINISH(req) req_invoke (req)
		103	static void aio_grp_feed (eio_req *grp);
		104	#define EIO_FEED(req) aio_grp_feed (req)
		105	static void req_destroy (eio_req *grp);
		106	#define EIO_DESTROY(req) req_destroy (req)
108		107
109	enum {	108	enum {
110	FLAG_CANCELLED = 0x01,	109	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
111	};	110	};
112		111
		112	#include "libeio/eio.c"
		113
113	typedef aio_cb *aio_req;	114	typedef eio_req *aio_req;
114	typedef aio_cb *aio_req_ornot;	115	typedef eio_req *aio_req_ornot;
115		116
116	enum {	117	static SV *on_next_submit;
117	PRI_MIN = -4,	118	static int next_pri = EIO_PRI_DEFAULT;
118	PRI_MAX = 4,
119
120	DEFAULT_PRI = 0,
121	PRI_BIAS = -PRI_MIN,
122	};
123
124	static int next_pri = DEFAULT_PRI + PRI_BIAS;
125
126	static int started, wanted;
127	static volatile int nreqs;
128	static int max_outstanding = 1<<30;	119	static int max_outstanding;
129	static int respipe [2];
130		120
131	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	121	static int respipe_osf [2], respipe [2] = { -1, -1 };
132	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
133	#else
134	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
135	#endif
136		122
137	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	123	static void req_destroy (aio_req req);
138	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
139	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
140
141	static volatile aio_req reqs, reqe; /* queue start, queue end */
142	static volatile aio_req ress, rese; /* queue start, queue end */
143
144	static void req_invoke (aio_req req);	124	static void req_cancel (aio_req req);
145	static void req_free (aio_req req);	125
		126	static void want_poll (void)
		127	{
		128	/* write a dummy byte to the pipe so fh becomes ready */
		129	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		130	}
		131
		132	static void done_poll (void)
		133	{
		134	/* read any signals sent by the worker threads */
		135	char buf [4];
		136	while (respipe_read (respipe [0], buf, 4) == 4)
		137	;
		138	}
146		139
147	/* must be called at most once */	140	/* must be called at most once */
148	static SV *req_sv (aio_req req, const char *klass)	141	static SV *req_sv (aio_req req, const char *klass)
149	{	142	{
150	if (!req->self)	143	if (!req->self)
…		…
168	return mg ? (aio_req)mg->mg_ptr : 0;	161	return mg ? (aio_req)mg->mg_ptr : 0;
169	}	162	}
170		163
171	static void aio_grp_feed (aio_req grp)	164	static void aio_grp_feed (aio_req grp)
172	{	165	{
173	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	166	if (grp->sv2 && SvOK (grp->sv2))
174	{	167	{
175	int old_len = grp->length;	168	dSP;
176		169
177	if (grp->fh2 && SvOK (grp->fh2))	170	ENTER;
		171	SAVETMPS;
		172	PUSHMARK (SP);
		173	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		174	PUTBACK;
		175	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		176	SPAGAIN;
		177	FREETMPS;
		178	LEAVE;
		179	}
		180	}
		181
		182	static void req_submit (eio_req *req)
		183	{
		184	eio_submit (req);
		185
		186	if (on_next_submit)
		187	{
		188	dSP;
		189	SV *cb = sv_2mortal (on_next_submit);
		190
		191	on_next_submit = 0;
		192
		193	PUSHMARK (SP);
		194	PUTBACK;
		195	call_sv (cb, G_DISCARD | G_EVAL);
		196	}
		197	}
		198
		199	static int req_invoke (eio_req *req)
		200	{
		201	dSP;
		202
		203	if (req->flags & FLAG_SV2_RO_OFF)
		204	SvREADONLY_off (req->sv2);
		205
		206	if (!EIO_CANCELLED (req) && SvOK (req->callback))
		207	{
		208	ENTER;
		209	SAVETMPS;
		210	PUSHMARK (SP);
		211	EXTEND (SP, 1);
		212
		213	switch (req->type)
178	{	214	{
179	dSP;	215	case EIO_READDIR:
		216	{
		217	SV *rv = &PL_sv_undef;
180		218
181	ENTER;	219	if (req->result >= 0)
182	SAVETMPS;	220	{
183	PUSHMARK (SP);	221	int i;
184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	222	char *buf = req->ptr2;
185	PUTBACK;	223	AV *av = newAV ();
186	call_sv (grp->fh2, G_VOID | G_EVAL);	224
187	SPAGAIN;	225	av_extend (av, req->result - 1);
188	FREETMPS;	226
189	LEAVE;	227	for (i = 0; i < req->result; ++i)
		228	{
		229	SV *sv = newSVpv (buf, 0);
		230
		231	av_store (av, i, sv);
		232	buf += SvCUR (sv) + 1;
		233	}
		234
		235	rv = sv_2mortal (newRV_noinc ((SV *)av));
		236	}
		237
		238	PUSHs (rv);
		239	}
		240	break;
		241
		242	case EIO_OPEN:
		243	{
		244	/* convert fd to fh */
		245	SV *fh = &PL_sv_undef;
		246
		247	if (req->result >= 0)
		248	{
		249	GV *gv = (GV *)sv_newmortal ();
		250	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		251	char sym [64];
		252	int symlen;
		253
		254	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		255	gv_init (gv, stash, sym, symlen, 0);
		256
		257	symlen = snprintf (
		258	sym,
		259	sizeof (sym),
		260	"%s&=%d",
		261	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		262	req->result
		263	);
		264
		265	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		266	fh = (SV *)gv;
		267	}
		268
		269	PUSHs (fh);
		270	}
		271	break;
		272
		273	case EIO_GROUP:
		274	req->int1 = 2; /* mark group as finished */
		275
		276	if (req->sv1)
		277	{
		278	int i;
		279	AV *av = (AV *)req->sv1;
		280
		281	EXTEND (SP, AvFILL (av) + 1);
		282	for (i = 0; i <= AvFILL (av); ++i)
		283	PUSHs (*av_fetch (av, i, 0));
		284	}
		285	break;
		286
		287	case EIO_NOP:
		288	case EIO_BUSY:
		289	break;
		290
		291	case EIO_READLINK:
		292	if (req->result > 0)
		293	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		294	break;
		295
		296	case EIO_STAT:
		297	case EIO_LSTAT:
		298	case EIO_FSTAT:
		299	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		300	PL_laststatval = req->result;
		301	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		302	PUSHs (sv_2mortal (newSViv (req->result)));
		303	break;
		304
		305	case EIO_READ:
		306	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		307	*SvEND (req->sv2) = 0;
		308	PUSHs (sv_2mortal (newSViv (req->result)));
		309	break;
		310
		311	case EIO_DUP2:
		312	if (req->result > 0)
		313	req->result = 0;
		314	/* FALLTHROUGH */
		315
		316	default:
		317	PUSHs (sv_2mortal (newSViv (req->result)));
		318	break;
190	}	319	}
191		320
192	/* stop if no progress has been made */	321	errno = req->errorno;
193	if (old_len == grp->length)	322
194	{	323	PUTBACK;
195	SvREFCNT_dec (grp->fh2);	324	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
196	grp->fh2 = 0;	325	SPAGAIN;
197	break;	326
198	}	327	FREETMPS;
		328	LEAVE;
		329
		330	PUTBACK;
199	}	331	}
200	}
201		332
202	static void aio_grp_dec (aio_req grp)	333	return !!SvTRUE (ERRSV);
203	{
204	--grp->length;
205
206	/* call feeder, if applicable */
207	aio_grp_feed (grp);
208
209	/* finish, if done */
210	if (!grp->length && grp->fd)
211	{
212	req_invoke (grp);
213	req_free (grp);
214	}
215	}	334	}
216		335
217	static void poll_wait ()
218	{
219	fd_set rfd;
220
221	while (nreqs)
222	{
223	aio_req req;
224	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
225	pthread_mutex_lock (&reslock);
226	#endif
227	req = ress;
228	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
229	pthread_mutex_unlock (&reslock);
230	#endif
231
232	if (req)
233	return;
234
235	FD_ZERO(&rfd);
236	FD_SET(respipe [0], &rfd);
237
238	select (respipe [0] + 1, &rfd, 0, 0, 0);
239	}
240	}
241
242	static void req_invoke (aio_req req)
243	{
244	dSP;
245	int errorno = errno;
246
247	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
248	return;
249
250	errno = req->errorno;
251
252	ENTER;
253	SAVETMPS;
254	PUSHMARK (SP);
255	EXTEND (SP, 1);
256
257	switch (req->type)
258	{
259	case REQ_READDIR:
260	{
261	SV *rv = &PL_sv_undef;
262
263	if (req->result >= 0)
264	{
265	char *buf = req->data2ptr;
266	AV *av = newAV ();
267
268	while (req->result)
269	{
270	SV *sv = newSVpv (buf, 0);
271
272	av_push (av, sv);
273	buf += SvCUR (sv) + 1;
274	req->result--;
275	}
276
277	rv = sv_2mortal (newRV_noinc ((SV *)av));
278	}
279
280	PUSHs (rv);
281	}
282	break;
283
284	case REQ_OPEN:
285	{
286	/* convert fd to fh */
287	SV *fh;
288
289	PUSHs (sv_2mortal (newSViv (req->result)));
290	PUTBACK;
291	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
292	SPAGAIN;
293
294	fh = SvREFCNT_inc (POPs);
295
296	PUSHMARK (SP);
297	XPUSHs (sv_2mortal (fh));
298	}
299	break;
300
301	case REQ_GROUP:
302	req->fd = 2; /* mark group as finished */
303
304	if (req->data)
305	{
306	int i;
307	AV *av = (AV *)req->data;
308
309	EXTEND (SP, AvFILL (av) + 1);
310	for (i = 0; i <= AvFILL (av); ++i)
311	PUSHs (*av_fetch (av, i, 0));
312	}
313	break;
314
315	case REQ_NOP:
316	case REQ_SLEEP:
317	break;
318
319	default:
320	PUSHs (sv_2mortal (newSViv (req->result)));
321	break;
322	}
323
324
325	PUTBACK;
326	call_sv (req->callback, G_VOID | G_EVAL);
327	SPAGAIN;
328
329	FREETMPS;
330	LEAVE;
331
332	errno = errorno;
333
334	if (SvTRUE (ERRSV))
335	{
336	req_free (req);
337	croak (0);
338	}
339	}
340
341	static void req_free (aio_req req)	336	static void req_destroy (aio_req req)
342	{	337	{
343	if (req->grp)
344	{
345	aio_req grp = req->grp;
346
347	/* unlink request */
348	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
349	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
350
351	if (grp->grp_first == req)
352	grp->grp_first = req->grp_next;
353
354	aio_grp_dec (grp);
355	}
356
357	if (req->self)	338	if (req->self)
358	{	339	{
359	sv_unmagic (req->self, PERL_MAGIC_ext);	340	sv_unmagic (req->self, PERL_MAGIC_ext);
360	SvREFCNT_dec (req->self);	341	SvREFCNT_dec (req->self);
361	}	342	}
362		343
363	SvREFCNT_dec (req->data);
364	SvREFCNT_dec (req->fh);	344	SvREFCNT_dec (req->sv1);
365	SvREFCNT_dec (req->fh2);	345	SvREFCNT_dec (req->sv2);
366	SvREFCNT_dec (req->callback);	346	SvREFCNT_dec (req->callback);
367	Safefree (req->statdata);
368
369	if (req->type == REQ_READDIR && req->result >= 0)
370	free (req->data2ptr);
371		347
372	Safefree (req);	348	Safefree (req);
373	}	349	}
374		350
375	static void req_cancel (aio_req req)	351	static void req_cancel_subs (aio_req grp)
376	{	352	{
377	req->flags |= FLAG_CANCELLED;	353	aio_req sub;
378		354
379	if (req->type == REQ_GROUP)	355	if (grp->type != EIO_GROUP)
		356	return;
		357
		358	SvREFCNT_dec (grp->sv2);
		359	grp->sv2 = 0;
		360
		361	eio_grp_cancel (grp);
		362	}
		363
		364	#ifdef USE_SOCKETS_AS_HANDLES
		365	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		366	#else
		367	# define TO_SOCKET(x) (x)
		368	#endif
		369
		370	static void
		371	create_respipe (void)
		372	{
		373	int old_readfd = respipe [0];
		374
		375	if (respipe [1] >= 0)
		376	respipe_close (TO_SOCKET (respipe [1]));
		377
		378	#ifdef _WIN32
		379	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		380	#else
		381	if (pipe (respipe))
		382	#endif
		383	croak ("unable to initialize result pipe");
		384
		385	if (old_readfd >= 0)
380	{	386	{
381	aio_req sub;	387	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		388	croak ("unable to initialize result pipe(2)");
382		389
383	for (sub = req->grp_first; sub; sub = sub->grp_next)	390	respipe_close (respipe [0]);
384	req_cancel (sub);	391	respipe [0] = old_readfd;
385	}	392	}
386	}
387		393
		394	#ifdef _WIN32
		395	int arg = 1;
		396	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		397	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		398	#else
		399	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		400	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		401	#endif
		402	croak ("unable to initialize result pipe(3)");
		403
		404	respipe_osf [0] = TO_SOCKET (respipe [0]);
		405	respipe_osf [1] = TO_SOCKET (respipe [1]);
		406	}
		407
		408	static void poll_wait (void)
		409	{
		410	fd_set rfd;
		411
		412	while (eio_nreqs ())
		413	{
		414	int size;
		415
		416	X_LOCK (reslock);
		417	size = res_queue.size;
		418	X_UNLOCK (reslock);
		419
		420	if (size)
		421	return;
		422
		423	etp_maybe_start_thread ();
		424
		425	FD_ZERO (&rfd);
		426	FD_SET (respipe [0], &rfd);
		427
		428	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		429	}
		430	}
		431
388	static int poll_cb ()	432	static int poll_cb (void)
389	{	433	{
390	dSP;
391	int count = 0;
392	int do_croak = 0;
393	aio_req req;
394
395	for (;;)	434	for (;;)
396	{	435	{
397	pthread_mutex_lock (&reslock);	436	int res = eio_poll ();
398	req = ress;
399		437
400	if (req)	438	if (res > 0)
401	{
402	ress = req->next;
403
404	if (!ress)
405	{
406	/* read any signals sent by the worker threads */
407	char buf [32];
408	while (read (respipe [0], buf, 32) == 32)
409	;
410
411	rese = 0;
412	}
413	}
414
415	pthread_mutex_unlock (&reslock);
416
417	if (!req)
418	break;	439	croak (0);
419		440
420	--nreqs;	441	if (!max_outstanding || max_outstanding > eio_nreqs ())
		442	return res;
421		443
422	if (req->type == REQ_QUIT)	444	poll_wait ();
423	started--;
424	else if (req->type == REQ_GROUP && req->length)
425	{
426	req->fd = 1; /* mark request as delayed */
427	continue;
428	}
429	else
430	{
431	if (req->type == REQ_READ)
432	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
433
434	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
435	SvREADONLY_off (req->data);
436
437	if (req->statdata)
438	{
439	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
440	PL_laststatval = req->result;
441	PL_statcache = *(req->statdata);
442	}
443
444	req_invoke (req);
445
446	count++;
447	}
448
449	req_free (req);
450	}	445	}
451
452	return count;
453	}
454
455	static void *aio_proc(void *arg);
456
457	static void start_thread (void)
458	{
459	sigset_t fullsigset, oldsigset;
460	pthread_t tid;
461	pthread_attr_t attr;
462
463	pthread_attr_init (&attr);
464	pthread_attr_setstacksize (&attr, STACKSIZE);
465	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
466
467	sigfillset (&fullsigset);
468	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
469
470	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
471	started++;
472
473	sigprocmask (SIG_SETMASK, &oldsigset, 0);
474	}
475
476	static void req_send (aio_req req)
477	{
478	while (started < wanted && nreqs >= started)
479	start_thread ();
480
481	++nreqs;
482
483	pthread_mutex_lock (&reqlock);
484
485	req->next = 0;
486
487	if (reqe)
488	{
489	reqe->next = req;
490	reqe = req;
491	}
492	else
493	reqe = reqs = req;
494
495	pthread_cond_signal (&reqwait);
496	pthread_mutex_unlock (&reqlock);
497
498	if (nreqs > max_outstanding)
499	for (;;)
500	{
501	poll_cb ();
502
503	if (nreqs <= max_outstanding)
504	break;
505
506	poll_wait ();
507	}
508	}
509
510	static void end_thread (void)
511	{
512	aio_req req;
513	Newz (0, req, 1, aio_cb);
514	req->type = REQ_QUIT;
515
516	req_send (req);
517	}
518
519	static void min_parallel (int nthreads)
520	{
521	if (wanted < nthreads)
522	wanted = nthreads;
523	}
524
525	static void max_parallel (int nthreads)
526	{
527	int cur = started;
528
529	if (wanted > nthreads)
530	wanted = nthreads;
531
532	while (cur > wanted)
533	{
534	end_thread ();
535	cur--;
536	}
537
538	while (started > wanted)
539	{
540	poll_wait ();
541	poll_cb ();
542	}
543	}
544
545	static void create_pipe ()
546	{
547	if (pipe (respipe))
548	croak ("unable to initialize result pipe");
549
550	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
551	croak ("cannot set result pipe to nonblocking mode");
552
553	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
554	croak ("cannot set result pipe to nonblocking mode");
555	}
556
557	/*****************************************************************************/
558	/* work around various missing functions */
559
560	#if !HAVE_PREADWRITE
561	# define pread aio_pread
562	# define pwrite aio_pwrite
563
564	/*
565	* make our pread/pwrite safe against themselves, but not against
566	* normal read/write by using a mutex. slows down execution a lot,
567	* but that's your problem, not mine.
568	*/
569	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
570
571	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
572	{
573	ssize_t res;
574	off_t ooffset;
575
576	pthread_mutex_lock (&preadwritelock);
577	ooffset = lseek (fd, 0, SEEK_CUR);
578	lseek (fd, offset, SEEK_SET);
579	res = read (fd, buf, count);
580	lseek (fd, ooffset, SEEK_SET);
581	pthread_mutex_unlock (&preadwritelock);
582
583	return res;
584	}
585
586	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
587	{
588	ssize_t res;
589	off_t ooffset;
590
591	pthread_mutex_lock (&preadwritelock);
592	ooffset = lseek (fd, 0, SEEK_CUR);
593	lseek (fd, offset, SEEK_SET);
594	res = write (fd, buf, count);
595	lseek (fd, offset, SEEK_SET);
596	pthread_mutex_unlock (&preadwritelock);
597
598	return res;
599	}
600	#endif
601
602	#if !HAVE_FDATASYNC
603	# define fdatasync fsync
604	#endif
605
606	#if !HAVE_READAHEAD
607	# define readahead aio_readahead
608
609	static ssize_t readahead (int fd, off_t offset, size_t count)
610	{
611	dBUF;
612
613	while (count > 0)
614	{
615	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
616
617	pread (fd, aio_buf, len, offset);
618	offset += len;
619	count -= len;
620	}
621
622	fBUF;
623
624	errno = 0;
625	}
626	#endif
627
628	#if !HAVE_READDIR_R
629	# define readdir_r aio_readdir_r
630
631	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
632
633	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
634	{
635	struct dirent *e;
636	int errorno;
637
638	pthread_mutex_lock (&readdirlock);
639
640	e = readdir (dirp);
641	errorno = errno;
642
643	if (e)
644	{
645	*res = ent;
646	strcpy (ent->d_name, e->d_name);
647	}
648	else
649	*res = 0;
650
651	pthread_mutex_unlock (&readdirlock);
652
653	errno = errorno;
654	return e ? 0 : -1;
655	}
656	#endif
657
658	/* sendfile always needs emulation */
659	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
660	{
661	ssize_t res;
662
663	if (!count)
664	return 0;
665
666	#if HAVE_SENDFILE
667	# if __linux
668	res = sendfile (ofd, ifd, &offset, count);
669
670	# elif __freebsd
671	/*
672	* Of course, the freebsd sendfile is a dire hack with no thoughts
673	* wasted on making it similar to other I/O functions.
674	*/
675	{
676	off_t sbytes;
677	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
678
679	if (res < 0 && sbytes)
680	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
681	res = sbytes;
682	}
683
684	# elif __hpux
685	res = sendfile (ofd, ifd, offset, count, 0, 0);
686
687	# elif __solaris
688	{
689	struct sendfilevec vec;
690	size_t sbytes;
691
692	vec.sfv_fd = ifd;
693	vec.sfv_flag = 0;
694	vec.sfv_off = offset;
695	vec.sfv_len = count;
696
697	res = sendfilev (ofd, &vec, 1, &sbytes);
698
699	if (res < 0 && sbytes)
700	res = sbytes;
701	}
702
703	# endif
704	#else
705	res = -1;
706	errno = ENOSYS;
707	#endif
708
709	if (res < 0
710	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
711	#if __solaris
712	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
713	#endif
714	)
715	)
716	{
717	/* emulate sendfile. this is a major pain in the ass */
718	dBUF;
719
720	res = 0;
721
722	while (count)
723	{
724	ssize_t cnt;
725
726	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
727
728	if (cnt <= 0)
729	{
730	if (cnt && !res) res = -1;
731	break;
732	}
733
734	cnt = write (ofd, aio_buf, cnt);
735
736	if (cnt <= 0)
737	{
738	if (cnt && !res) res = -1;
739	break;
740	}
741
742	offset += cnt;
743	res += cnt;
744	count -= cnt;
745	}
746
747	fBUF;
748	}
749
750	return res;
751	}
752
753	/* read a full directory */
754	static int scandir_ (const char *path, void **namesp)
755	{
756	DIR *dirp;
757	union
758	{
759	struct dirent d;
760	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
761	} *u;
762	struct dirent *entp;
763	char *name, *names;
764	int memlen = 4096;
765	int memofs = 0;
766	int res = 0;
767	int errorno;
768
769	dirp = opendir (path);
770	if (!dirp)
771	return -1;
772
773	u = malloc (sizeof (*u));
774	names = malloc (memlen);
775
776	if (u && names)
777	for (;;)
778	{
779	errno = 0;
780	readdir_r (dirp, &u->d, &entp);
781
782	if (!entp)
783	break;
784
785	name = entp->d_name;
786
787	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
788	{
789	int len = strlen (name) + 1;
790
791	res++;
792
793	while (memofs + len > memlen)
794	{
795	memlen *= 2;
796	names = realloc (names, memlen);
797	if (!names)
798	break;
799	}
800
801	memcpy (names + memofs, name, len);
802	memofs += len;
803	}
804	}
805
806	errorno = errno;
807	free (u);
808	closedir (dirp);
809
810	if (errorno)
811	{
812	free (names);
813	errno = errorno;
814	res = -1;
815	}
816
817	*namesp = (void *)names;
818	return res;
819	}
820
821	/*****************************************************************************/
822
823	static void *aio_proc (void *thr_arg)
824	{
825	aio_req req;
826	int type;
827
828	do
829	{
830	pthread_mutex_lock (&reqlock);
831
832	for (;;)
833	{
834	req = reqs;
835
836	if (reqs)
837	{
838	reqs = reqs->next;
839	if (!reqs) reqe = 0;
840	}
841
842	if (req)
843	break;
844
845	pthread_cond_wait (&reqwait, &reqlock);
846	}
847
848	pthread_mutex_unlock (&reqlock);
849
850	errno = 0; /* strictly unnecessary */
851	type = req->type; /* remember type for QUIT check */
852
853	if (!(req->flags & FLAG_CANCELLED))
854	switch (type)
855	{
856	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
857	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
858
859	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
860	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
861
862	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
863	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
864	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
865
866	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
867	case REQ_CLOSE: req->result = close (req->fd); break;
868	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
869	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
870	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
871	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
872	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
873
874	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
875	case REQ_FSYNC: req->result = fsync (req->fd); break;
876	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
877
878	case REQ_SLEEP:
879	{
880	struct timeval tv;
881
882	tv.tv_sec = req->fd;
883	tv.tv_usec = req->fd2;
884
885	req->result = select (0, 0, 0, 0, &tv);
886	}
887
888	case REQ_GROUP:
889	case REQ_NOP:
890	case REQ_QUIT:
891	break;
892
893	default:
894	req->result = ENOSYS;
895	break;
896	}
897
898	req->errorno = errno;
899
900	pthread_mutex_lock (&reslock);
901
902	req->next = 0;
903
904	if (rese)
905	{
906	rese->next = req;
907	rese = req;
908	}
909	else
910	{
911	rese = ress = req;
912
913	/* write a dummy byte to the pipe so fh becomes ready */
914	write (respipe [1], &respipe, 1);
915	}
916
917	pthread_mutex_unlock (&reslock);
918	}
919	while (type != REQ_QUIT);
920
921	return 0;
922	}
923
924	/*****************************************************************************/
925
926	static void atfork_prepare (void)
927	{
928	pthread_mutex_lock (&reqlock);
929	pthread_mutex_lock (&reslock);
930	#if !HAVE_PREADWRITE
931	pthread_mutex_lock (&preadwritelock);
932	#endif
933	#if !HAVE_READDIR_R
934	pthread_mutex_lock (&readdirlock);
935	#endif
936	}
937
938	static void atfork_parent (void)
939	{
940	#if !HAVE_READDIR_R
941	pthread_mutex_unlock (&readdirlock);
942	#endif
943	#if !HAVE_PREADWRITE
944	pthread_mutex_unlock (&preadwritelock);
945	#endif
946	pthread_mutex_unlock (&reslock);
947	pthread_mutex_unlock (&reqlock);
948	}	446	}
949		447
950	static void atfork_child (void)	448	static void atfork_child (void)
951	{	449	{
952	aio_req prv;
953
954	started = 0;
955
956	while (reqs)
957	{
958	prv = reqs;
959	reqs = prv->next;
960	req_free (prv);
961	}
962
963	reqs = reqe = 0;
964
965	while (ress)
966	{
967	prv = ress;
968	ress = prv->next;
969	req_free (prv);
970	}
971
972	ress = rese = 0;
973
974	close (respipe [0]);
975	close (respipe [1]);
976	create_pipe ();	450	create_respipe ();
977
978	atfork_parent ();
979	}	451	}
980		452
981	#define dREQ \	453	#define dREQ \
982	aio_req req; \	454	aio_req req; \
983	int req_pri = next_pri; \	455	int req_pri = next_pri; \
984	next_pri = DEFAULT_PRI + PRI_BIAS; \	456	next_pri = EIO_PRI_DEFAULT; \
985	\	457	\
986	if (SvOK (callback) && !SvROK (callback)) \	458	if (SvOK (callback) && !SvROK (callback)) \
987	croak ("callback must be undef or of reference type"); \	459	croak ("callback must be undef or of reference type"); \
988	\	460	\
989	Newz (0, req, 1, aio_cb); \	461	Newz (0, req, 1, eio_req); \
990	if (!req) \	462	if (!req) \
991	croak ("out of memory during aio_req allocation"); \	463	croak ("out of memory during eio_req allocation"); \
992	\	464	\
993	req->callback = newSVsv (callback); \	465	req->callback = newSVsv (callback); \
994	req->pri = req_pri	466	req->pri = req_pri
995		467
996	#define REQ_SEND \	468	#define REQ_SEND \
		469	PUTBACK; \
997	req_send (req); \	470	req_submit (req); \
		471	SPAGAIN; \
998	\	472	\
999	if (GIMME_V != G_VOID) \	473	if (GIMME_V != G_VOID) \
1000	XPUSHs (req_sv (req, AIO_REQ_KLASS));	474	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1001		475
1002	MODULE = IO::AIO PACKAGE = IO::AIO	476	MODULE = IO::AIO PACKAGE = IO::AIO
1003		477
1004	PROTOTYPES: ENABLE	478	PROTOTYPES: ENABLE
1005		479
1006	BOOT:	480	BOOT:
1007	{	481	{
1008	HV *stash = gv_stashpv ("IO::AIO", 1);	482	stash = gv_stashpv ("IO::AIO", 1);
		483
1009	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	484	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1010	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	485	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1011	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	486	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		487	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		488	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		489	#ifndef _WIN32
		490	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		491	#endif
1012		492
1013	create_pipe ();	493	create_respipe ();
1014	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1015	}
1016		494
		495	if (eio_init (want_poll, done_poll) < 0)
		496	croak ("IO::AIO: unable to initialise eio library");
		497
		498	/* atfork child called in fifo order, so before eio's handler */
		499	X_THREAD_ATFORK (0, 0, atfork_child);
		500	}
		501
1017	void	502	void
1018	min_parallel (nthreads)	503	max_poll_reqs (int nreqs)
1019	int nthreads
1020	PROTOTYPE: $	504	PROTOTYPE: $
		505	CODE:
		506	eio_set_max_poll_reqs (nreqs);
1021		507
1022	void	508	void
1023	max_parallel (nthreads)	509	max_poll_time (double nseconds)
1024	int nthreads
1025	PROTOTYPE: $	510	PROTOTYPE: $
1026
1027	int
1028	max_outstanding (nreqs)
1029	int nreqs
1030	PROTOTYPE: $
1031	CODE:	511	CODE:
1032	RETVAL = max_outstanding;	512	eio_set_max_poll_time (nseconds);
		513
		514	void
		515	min_parallel (int nthreads)
		516	PROTOTYPE: $
		517	CODE:
		518	eio_set_min_parallel (nthreads);
		519
		520	void
		521	max_parallel (int nthreads)
		522	PROTOTYPE: $
		523	CODE:
		524	eio_set_max_parallel (nthreads);
		525
		526	void
		527	max_idle (int nthreads)
		528	PROTOTYPE: $
		529	CODE:
		530	eio_set_max_idle (nthreads);
		531
		532	void
		533	max_outstanding (int maxreqs)
		534	PROTOTYPE: $
		535	CODE:
1033	max_outstanding = nreqs;	536	max_outstanding = maxreqs;
1034		537
1035	void	538	void
1036	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	539	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1037	SV * pathname
1038	int flags
1039	int mode
1040	SV * callback
1041	PROTOTYPE: $$$;$	540	PROTOTYPE: $$$;$
1042	PPCODE:	541	PPCODE:
1043	{	542	{
1044	dREQ;	543	dREQ;
1045		544
1046	req->type = REQ_OPEN;	545	req->type = EIO_OPEN;
1047	req->data = newSVsv (pathname);	546	req->sv1 = newSVsv (pathname);
1048	req->dataptr = SvPVbyte_nolen (req->data);	547	req->ptr1 = SvPVbyte_nolen (req->sv1);
1049	req->fd = flags;	548	req->int1 = flags;
1050	req->mode = mode;	549	req->int2 = mode;
1051		550
1052	REQ_SEND;	551	REQ_SEND;
1053	}	552	}
1054		553
1055	void	554	void
1056	aio_close (fh,callback=&PL_sv_undef)	555	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1057	SV * fh
1058	SV * callback
1059	PROTOTYPE: $;$	556	PROTOTYPE: $;$
1060	ALIAS:	557	ALIAS:
1061	aio_close = REQ_CLOSE
1062	aio_fsync = REQ_FSYNC	558	aio_fsync = EIO_FSYNC
1063	aio_fdatasync = REQ_FDATASYNC	559	aio_fdatasync = EIO_FDATASYNC
1064	PPCODE:	560	PPCODE:
1065	{	561	{
1066	dREQ;	562	dREQ;
1067		563
1068	req->type = ix;	564	req->type = ix;
1069	req->fh = newSVsv (fh);	565	req->sv1 = newSVsv (fh);
1070	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	566	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1071		567
1072	REQ_SEND (req);	568	REQ_SEND (req);
1073	}	569	}
1074		570
1075	void	571	void
		572	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		573	PROTOTYPE: $;$
		574	PPCODE:
		575	{
		576	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		577	dREQ;
		578
		579	if (close_pipe < 0)
		580	{
		581	int pipefd [2];
		582
		583	if (pipe (pipefd) < 0
		584	|| close (pipefd [1]) < 0
		585	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		586	abort (); /*D*/
		587
		588	close_pipe = pipefd [0];
		589	}
		590
		591	req->type = EIO_DUP2;
		592	req->int1 = close_pipe;
		593	req->sv2 = newSVsv (fh);
		594	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		595
		596	REQ_SEND (req);
		597	}
		598
		599	void
1076	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	600	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1077	SV * fh
1078	UV offset
1079	UV length
1080	SV * data
1081	UV dataoffset
1082	SV * callback
1083	ALIAS:	601	ALIAS:
1084	aio_read = REQ_READ	602	aio_read = EIO_READ
1085	aio_write = REQ_WRITE	603	aio_write = EIO_WRITE
1086	PROTOTYPE: $$$$$;$	604	PROTOTYPE: $$$$$;$
1087	PPCODE:	605	PPCODE:
1088	{	606	{
1089	aio_req req;
1090	STRLEN svlen;	607	STRLEN svlen;
1091	char *svptr = SvPVbyte (data, svlen);	608	char *svptr = SvPVbyte (data, svlen);
		609	UV len = SvUV (length);
1092		610
1093	SvUPGRADE (data, SVt_PV);	611	SvUPGRADE (data, SVt_PV);
1094	SvPOK_on (data);	612	SvPOK_on (data);
1095		613
1096	if (dataoffset < 0)	614	if (dataoffset < 0)
1097	dataoffset += svlen;	615	dataoffset += svlen;
1098		616
1099	if (dataoffset < 0 || dataoffset > svlen)	617	if (dataoffset < 0 || dataoffset > svlen)
1100	croak ("data offset outside of string");	618	croak ("dataoffset outside of data scalar");
1101		619
1102	if (ix == REQ_WRITE)	620	if (ix == EIO_WRITE)
1103	{	621	{
1104	/* write: check length and adjust. */	622	/* write: check length and adjust. */
1105	if (length < 0 || length + dataoffset > svlen)	623	if (!SvOK (length) || len + dataoffset > svlen)
1106	length = svlen - dataoffset;	624	len = svlen - dataoffset;
1107	}	625	}
1108	else	626	else
1109	{	627	{
1110	/* read: grow scalar as necessary */	628	/* read: grow scalar as necessary */
1111	svptr = SvGROW (data, length + dataoffset);	629	svptr = SvGROW (data, len + dataoffset + 1);
1112	}	630	}
1113		631
1114	if (length < 0)	632	if (len < 0)
1115	croak ("length must not be negative");	633	croak ("length must not be negative");
1116		634
1117	{	635	{
1118	dREQ;	636	dREQ;
1119		637
1120	req->type = ix;	638	req->type = ix;
1121	req->fh = newSVsv (fh);	639	req->sv1 = newSVsv (fh);
1122	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	640	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1123	: IoOFP (sv_2io (fh)));	641	: IoOFP (sv_2io (fh)));
		642	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1124	req->offset = offset;	643	req->size = len;
1125	req->length = length;
1126	req->data = SvREFCNT_inc (data);	644	req->sv2 = SvREFCNT_inc (data);
1127	req->dataptr = (char *)svptr + dataoffset;	645	req->ptr2 = (char *)svptr + dataoffset;
		646	req->stroffset = dataoffset;
1128		647
1129	if (!SvREADONLY (data))	648	if (!SvREADONLY (data))
1130	{	649	{
1131	SvREADONLY_on (data);	650	SvREADONLY_on (data);
1132	req->data2ptr = (void *)data;	651	req->flags |= FLAG_SV2_RO_OFF;
1133	}	652	}
1134		653
1135	REQ_SEND;	654	REQ_SEND;
1136	}	655	}
1137	}	656	}
1138		657
1139	void	658	void
		659	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		660	PROTOTYPE: $$;$
		661	PPCODE:
		662	{
		663	SV *data;
		664	dREQ;
		665
		666	req->type = EIO_READLINK;
		667	req->sv1 = newSVsv (path);
		668	req->ptr1 = SvPVbyte_nolen (req->sv1);
		669
		670	REQ_SEND;
		671	}
		672
		673	void
1140	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	674	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1141	SV * out_fh
1142	SV * in_fh
1143	UV in_offset
1144	UV length
1145	SV * callback
1146	PROTOTYPE: $$$$;$	675	PROTOTYPE: $$$$;$
1147	PPCODE:	676	PPCODE:
1148	{	677	{
1149	dREQ;	678	dREQ;
1150		679
1151	req->type = REQ_SENDFILE;	680	req->type = EIO_SENDFILE;
1152	req->fh = newSVsv (out_fh);	681	req->sv1 = newSVsv (out_fh);
1153	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	682	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1154	req->fh2 = newSVsv (in_fh);	683	req->sv2 = newSVsv (in_fh);
1155	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	684	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1156	req->offset = in_offset;	685	req->offs = SvVAL64 (in_offset);
1157	req->length = length;	686	req->size = length;
1158		687
1159	REQ_SEND;	688	REQ_SEND;
1160	}	689	}
1161		690
1162	void	691	void
1163	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	692	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1164	SV * fh
1165	UV offset
1166	IV length
1167	SV * callback
1168	PROTOTYPE: $$$;$	693	PROTOTYPE: $$$;$
1169	PPCODE:	694	PPCODE:
1170	{	695	{
1171	dREQ;	696	dREQ;
1172		697
1173	req->type = REQ_READAHEAD;	698	req->type = EIO_READAHEAD;
1174	req->fh = newSVsv (fh);	699	req->sv1 = newSVsv (fh);
1175	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	700	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1176	req->offset = offset;	701	req->offs = SvVAL64 (offset);
1177	req->length = length;	702	req->size = length;
1178		703
1179	REQ_SEND;	704	REQ_SEND;
1180	}	705	}
1181		706
1182	void	707	void
1183	aio_stat (fh_or_path,callback=&PL_sv_undef)	708	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1184	SV * fh_or_path
1185	SV * callback
1186	ALIAS:	709	ALIAS:
1187	aio_stat = REQ_STAT	710	aio_stat = EIO_STAT
1188	aio_lstat = REQ_LSTAT	711	aio_lstat = EIO_LSTAT
1189	PPCODE:	712	PPCODE:
1190	{	713	{
1191	dREQ;	714	dREQ;
1192		715
1193	New (0, req->statdata, 1, Stat_t);	716	req->sv1 = newSVsv (fh_or_path);
1194	if (!req->statdata)
1195	{
1196	req_free (req);
1197	croak ("out of memory during aio_req->statdata allocation");
1198	}
1199		717
1200	if (SvPOK (fh_or_path))	718	if (SvPOK (req->sv1))
1201	{	719	{
1202	req->type = ix;	720	req->type = ix;
1203	req->data = newSVsv (fh_or_path);
1204	req->dataptr = SvPVbyte_nolen (req->data);	721	req->ptr1 = SvPVbyte_nolen (req->sv1);
1205	}	722	}
1206	else	723	else
1207	{	724	{
1208	req->type = REQ_FSTAT;	725	req->type = EIO_FSTAT;
1209	req->fh = newSVsv (fh_or_path);
1210	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	726	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1211	}	727	}
1212		728
1213	REQ_SEND;	729	REQ_SEND;
1214	}	730	}
1215		731
1216	void	732	void
		733	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		734	PPCODE:
		735	{
		736	dREQ;
		737
		738	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		739	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		740	req->sv1 = newSVsv (fh_or_path);
		741
		742	if (SvPOK (req->sv1))
		743	{
		744	req->type = EIO_UTIME;
		745	req->ptr1 = SvPVbyte_nolen (req->sv1);
		746	}
		747	else
		748	{
		749	req->type = EIO_FUTIME;
		750	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		751	}
		752
		753	REQ_SEND;
		754	}
		755
		756	void
		757	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		758	PPCODE:
		759	{
		760	dREQ;
		761
		762	req->sv1 = newSVsv (fh_or_path);
		763	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		764
		765	if (SvPOK (req->sv1))
		766	{
		767	req->type = EIO_TRUNCATE;
		768	req->ptr1 = SvPVbyte_nolen (req->sv1);
		769	}
		770	else
		771	{
		772	req->type = EIO_FTRUNCATE;
		773	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		774	}
		775
		776	REQ_SEND;
		777	}
		778
		779	void
		780	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		781	ALIAS:
		782	aio_chmod = EIO_CHMOD
		783	aio_mkdir = EIO_MKDIR
		784	PPCODE:
		785	{
		786	dREQ;
		787
		788	req->int2 = mode;
		789	req->sv1 = newSVsv (fh_or_path);
		790
		791	if (SvPOK (req->sv1))
		792	{
		793	req->type = ix;
		794	req->ptr1 = SvPVbyte_nolen (req->sv1);
		795	}
		796	else
		797	{
		798	req->type = EIO_FCHMOD;
		799	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		800	}
		801
		802	REQ_SEND;
		803	}
		804
		805	void
		806	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		807	PPCODE:
		808	{
		809	dREQ;
		810
		811	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		812	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		813	req->sv1 = newSVsv (fh_or_path);
		814
		815	if (SvPOK (req->sv1))
		816	{
		817	req->type = EIO_CHOWN;
		818	req->ptr1 = SvPVbyte_nolen (req->sv1);
		819	}
		820	else
		821	{
		822	req->type = EIO_FCHOWN;
		823	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		824	}
		825
		826	REQ_SEND;
		827	}
		828
		829	void
1217	aio_unlink (pathname,callback=&PL_sv_undef)	830	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1218	SV * pathname
1219	SV * callback
1220	ALIAS:	831	ALIAS:
1221	aio_unlink = REQ_UNLINK	832	aio_unlink = EIO_UNLINK
1222	aio_rmdir = REQ_RMDIR	833	aio_rmdir = EIO_RMDIR
1223	aio_readdir = REQ_READDIR	834	aio_readdir = EIO_READDIR
1224	PPCODE:	835	PPCODE:
1225	{	836	{
1226	dREQ;	837	dREQ;
1227		838
1228	req->type = ix;	839	req->type = ix;
1229	req->data = newSVsv (pathname);	840	req->sv1 = newSVsv (pathname);
1230	req->dataptr = SvPVbyte_nolen (req->data);	841	req->ptr1 = SvPVbyte_nolen (req->sv1);
		842
		843	REQ_SEND;
		844	}
		845
		846	void
		847	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		848	ALIAS:
		849	aio_link = EIO_LINK
		850	aio_symlink = EIO_SYMLINK
		851	aio_rename = EIO_RENAME
		852	PPCODE:
		853	{
		854	dREQ;
		855
		856	req->type = ix;
		857	req->sv1 = newSVsv (oldpath);
		858	req->ptr1 = SvPVbyte_nolen (req->sv1);
		859	req->sv2 = newSVsv (newpath);
		860	req->ptr2 = SvPVbyte_nolen (req->sv2);
1231		861
1232	REQ_SEND;	862	REQ_SEND;
1233	}	863	}
1234		864
1235	void	865	void
1236	aio_link (oldpath,newpath,callback=&PL_sv_undef)	866	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1237	SV * oldpath
1238	SV * newpath
1239	SV * callback
1240	ALIAS:
1241	aio_link = REQ_LINK
1242	aio_symlink = REQ_SYMLINK
1243	aio_rename = REQ_RENAME
1244	PPCODE:	867	PPCODE:
1245	{	868	{
1246	dREQ;	869	dREQ;
1247		870
1248	req->type = ix;	871	req->type = EIO_MKNOD;
1249	req->fh = newSVsv (oldpath);	872	req->sv1 = newSVsv (pathname);
1250	req->data2ptr = SvPVbyte_nolen (req->fh);	873	req->ptr1 = SvPVbyte_nolen (req->sv1);
1251	req->data = newSVsv (newpath);	874	req->int2 = (mode_t)mode;
1252	req->dataptr = SvPVbyte_nolen (req->data);	875	req->offs = dev;
1253		876
1254	REQ_SEND;	877	REQ_SEND;
1255	}	878	}
1256		879
1257	void	880	void
1258	aio_sleep (delay,callback=&PL_sv_undef)	881	aio_busy (double delay, SV *callback=&PL_sv_undef)
1259	double delay
1260	SV * callback
1261	PPCODE:	882	PPCODE:
1262	{	883	{
1263	dREQ;	884	dREQ;
1264		885
1265	req->type = REQ_SLEEP;	886	req->type = EIO_BUSY;
1266	req->fd = delay < 0. ? 0 : delay;	887	req->nv1 = delay < 0. ? 0. : delay;
1267	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1268		888
1269	REQ_SEND;	889	REQ_SEND;
1270	}	890	}
1271		891
1272	void	892	void
1273	aio_group (callback=&PL_sv_undef)	893	aio_group (SV *callback=&PL_sv_undef)
1274	SV * callback
1275	PROTOTYPE: ;$	894	PROTOTYPE: ;$
1276	PPCODE:	895	PPCODE:
1277	{	896	{
1278	dREQ;	897	dREQ;
1279		898
1280	req->type = REQ_GROUP;	899	req->type = EIO_GROUP;
		900
1281	req_send (req);	901	eio_submit (req);
1282
1283	XPUSHs (req_sv (req, AIO_GRP_KLASS));	902	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1284	}	903	}
1285		904
1286	void	905	void
1287	aio_nop (callback=&PL_sv_undef)	906	aio_nop (SV *callback=&PL_sv_undef)
1288	SV * callback	907	ALIAS:
		908	aio_nop = EIO_NOP
		909	aio_sync = EIO_SYNC
1289	PPCODE:	910	PPCODE:
1290	{	911	{
1291	dREQ;	912	dREQ;
1292		913
1293	req->type = REQ_NOP;	914	req->type = ix;
1294		915
1295	REQ_SEND;	916	REQ_SEND;
1296	}	917	}
1297		918
1298	#if 0	919	int
1299		920	aioreq_pri (int pri = 0)
1300	void	921	PROTOTYPE: ;$
1301	aio_pri (int pri = DEFAULT_PRI)
1302	CODE:	922	CODE:
		923	RETVAL = next_pri;
		924	if (items > 0)
		925	{
1303	if (pri < PRI_MIN) pri = PRI_MIN;	926	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1304	if (pri > PRI_MAX) pri = PRI_MAX;	927	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1305	next_pri = pri + PRI_BIAS;	928	next_pri = pri;
		929	}
		930	OUTPUT:
		931	RETVAL
1306		932
1307	#endif	933	void
		934	aioreq_nice (int nice = 0)
		935	CODE:
		936	nice = next_pri - nice;
		937	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		938	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		939	next_pri = nice;
1308		940
1309	void	941	void
1310	flush ()	942	flush ()
1311	PROTOTYPE:	943	PROTOTYPE:
1312	CODE:	944	CODE:
1313	while (nreqs)	945	while (eio_nreqs ())
1314	{	946	{
1315	poll_wait ();	947	poll_wait ();
1316	poll_cb ();	948	poll_cb ();
1317	}	949	}
1318		950
1319	void	951	int
1320	poll()	952	poll()
1321	PROTOTYPE:	953	PROTOTYPE:
1322	CODE:	954	CODE:
1323	if (nreqs)
1324	{
1325	poll_wait ();	955	poll_wait ();
1326	poll_cb ();	956	RETVAL = poll_cb ();
1327	}	957	OUTPUT:
		958	RETVAL
1328		959
1329	int	960	int
1330	poll_fileno()	961	poll_fileno()
1331	PROTOTYPE:	962	PROTOTYPE:
1332	CODE:	963	CODE:
…		…
1344		975
1345	void	976	void
1346	poll_wait()	977	poll_wait()
1347	PROTOTYPE:	978	PROTOTYPE:
1348	CODE:	979	CODE:
1349	if (nreqs)
1350	poll_wait ();	980	poll_wait ();
1351		981
1352	int	982	int
1353	nreqs()	983	nreqs()
1354	PROTOTYPE:	984	PROTOTYPE:
1355	CODE:	985	CODE:
1356	RETVAL = nreqs;	986	RETVAL = eio_nreqs ();
1357	OUTPUT:	987	OUTPUT:
1358	RETVAL	988	RETVAL
1359		989
		990	int
		991	nready()
		992	PROTOTYPE:
		993	CODE:
		994	RETVAL = eio_nready ();
		995	OUTPUT:
		996	RETVAL
		997
		998	int
		999	npending()
		1000	PROTOTYPE:
		1001	CODE:
		1002	RETVAL = eio_npending ();
		1003	OUTPUT:
		1004	RETVAL
		1005
		1006	int
		1007	nthreads()
		1008	PROTOTYPE:
		1009	CODE:
		1010	RETVAL = eio_nthreads ();
		1011	OUTPUT:
		1012	RETVAL
		1013
		1014	void _on_next_submit (SV *cb)
		1015	CODE:
		1016	SvREFCNT_dec (on_next_submit);
		1017	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1018
1360	PROTOTYPES: DISABLE	1019	PROTOTYPES: DISABLE
1361		1020
1362	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1021	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1363		1022
1364	void	1023	void
1365	cancel (aio_req_ornot req)	1024	cancel (aio_req_ornot req)
1366	PROTOTYPE:
1367	CODE:	1025	CODE:
1368	req_cancel (req);	1026	eio_cancel (req);
1369		1027
1370	void	1028	void
1371	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1029	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1372	CODE:	1030	CODE:
1373	SvREFCNT_dec (req->callback);	1031	SvREFCNT_dec (req->callback);
…		…
1378	void	1036	void
1379	add (aio_req grp, ...)	1037	add (aio_req grp, ...)
1380	PPCODE:	1038	PPCODE:
1381	{	1039	{
1382	int i;	1040	int i;
1383	aio_req req;
1384		1041
1385	if (grp->fd == 2)	1042	if (grp->int1 == 2)
1386	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1043	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1387		1044
1388	for (i = 1; i < items; ++i )	1045	for (i = 1; i < items; ++i )
1389	{	1046	{
		1047	aio_req req;
		1048
1390	if (GIMME_V != G_VOID)	1049	if (GIMME_V != G_VOID)
1391	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1050	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1392		1051
1393	req = SvAIO_REQ (ST (i));	1052	req = SvAIO_REQ (ST (i));
1394		1053
1395	if (req)	1054	if (req)
1396	{	1055	eio_grp_add (grp, req);
1397	++grp->length;
1398	req->grp = grp;
1399
1400	req->grp_prev = 0;
1401	req->grp_next = grp->grp_first;
1402
1403	if (grp->grp_first)
1404	grp->grp_first->grp_prev = req;
1405
1406	grp->grp_first = req;
1407	}	1056	}
1408	}
1409	}	1057	}
		1058
		1059	void
		1060	cancel_subs (aio_req_ornot req)
		1061	CODE:
		1062	req_cancel_subs (req);
1410		1063
1411	void	1064	void
1412	result (aio_req grp, ...)	1065	result (aio_req grp, ...)
1413	CODE:	1066	CODE:
1414	{	1067	{
1415	int i;	1068	int i;
		1069	AV *av;
		1070
		1071	grp->errorno = errno;
		1072
1416	AV *av = newAV ();	1073	av = newAV ();
1417		1074
1418	for (i = 1; i < items; ++i )	1075	for (i = 1; i < items; ++i )
1419	av_push (av, newSVsv (ST (i)));	1076	av_push (av, newSVsv (ST (i)));
1420		1077
1421	SvREFCNT_dec (grp->data);	1078	SvREFCNT_dec (grp->sv1);
1422	grp->data = (SV *)av;	1079	grp->sv1 = (SV *)av;
1423	}	1080	}
1424		1081
1425	void	1082	void
		1083	errno (aio_req grp, int errorno = errno)
		1084	CODE:
		1085	grp->errorno = errorno;
		1086
		1087	void
1426	feed_limit (aio_req grp, int limit)	1088	limit (aio_req grp, int limit)
1427	CODE:	1089	CODE:
1428	grp->fd2 = limit;	1090	eio_grp_limit (grp, limit);
1429	aio_grp_feed (grp);
1430		1091
1431	void	1092	void
1432	feed (aio_req grp, SV *callback=&PL_sv_undef)	1093	feed (aio_req grp, SV *callback=&PL_sv_undef)
1433	CODE:	1094	CODE:
1434	{	1095	{
1435	SvREFCNT_dec (grp->fh2);	1096	SvREFCNT_dec (grp->sv2);
1436	grp->fh2 = newSVsv (callback);	1097	grp->sv2 = newSVsv (callback);
1437		1098
1438	if (grp->fd2 <= 0)	1099	if (grp->int2 <= 0)
1439	grp->fd2 = 2;	1100	grp->int2 = 2;
1440		1101
1441	aio_grp_feed (grp);	1102	eio_grp_limit (grp, grp->int2);
1442	}	1103	}
1443		1104

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