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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.69 by root, Tue Oct 24 11:57:30 2006 UTC vs.
Revision 1.125 by root, Thu Jun 19 09:05:43 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_BUSY,
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	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
123	};
124
125	static int next_pri = DEFAULT_PRI + PRI_BIAS;
126
127	static int started, wanted;
128	static volatile int nreqs;
129	static int max_outstanding = 1<<30;	119	static int max_outstanding;
130	static int respipe [2];
131		120
132	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	121	static int respipe_osf [2], respipe [2] = { -1, -1 };
133	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
134	#else
135	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
136	#endif
137		122
138	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	123	static void req_destroy (aio_req req);
139	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
140	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
141
142	/*
143	* a somewhat faster data structure might be nice, but
144	* with 8 priorities this actually needs <20 insns
145	* per shift, the most expensive operation.
146	*/
147	typedef struct {
148	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
149	int size;
150	} reqq;
151
152	static reqq req_queue;
153	static reqq res_queue;
154
155	int reqq_push (reqq *q, aio_req req)
156	{
157	int pri = req->pri;
158	req->next = 0;
159
160	if (q->qe[pri])
161	{
162	q->qe[pri]->next = req;
163	q->qe[pri] = req;
164	}
165	else
166	q->qe[pri] = q->qs[pri] = req;
167
168	return q->size++;
169	}
170
171	aio_req reqq_shift (reqq *q)
172	{
173	int pri;
174
175	if (!q->size)
176	return 0;
177
178	--q->size;
179
180	for (pri = NUM_PRI; pri--; )
181	{
182	aio_req req = q->qs[pri];
183
184	if (req)
185	{
186	if (!(q->qs[pri] = req->next))
187	q->qe[pri] = 0;
188
189	return req;
190	}
191	}
192
193	abort ();
194	}
195
196	static void req_invoke (aio_req req);	124	static void req_cancel (aio_req req);
197	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	}
198		139
199	/* must be called at most once */	140	/* must be called at most once */
200	static SV *req_sv (aio_req req, const char *klass)	141	static SV *req_sv (aio_req req, const char *klass)
201	{	142	{
202	if (!req->self)	143	if (!req->self)
…		…
220	return mg ? (aio_req)mg->mg_ptr : 0;	161	return mg ? (aio_req)mg->mg_ptr : 0;
221	}	162	}
222		163
223	static void aio_grp_feed (aio_req grp)	164	static void aio_grp_feed (aio_req grp)
224	{	165	{
225	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	166	if (grp->sv2 && SvOK (grp->sv2))
226	{	167	{
227	int old_len = grp->length;
228
229	if (grp->fh2 && SvOK (grp->fh2))
230	{
231	dSP;	168	dSP;
232		169
233	ENTER;	170	ENTER;
234	SAVETMPS;	171	SAVETMPS;
235	PUSHMARK (SP);	172	PUSHMARK (SP);
236	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	173	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
237	PUTBACK;	174	PUTBACK;
238	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	175	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
239	SPAGAIN;	176	SPAGAIN;
240	FREETMPS;	177	FREETMPS;
241	LEAVE;	178	LEAVE;
242	}
243
244	/* stop if no progress has been made */
245	if (old_len == grp->length)
246	{
247	SvREFCNT_dec (grp->fh2);
248	grp->fh2 = 0;
249	break;
250	}
251	}	179	}
252	}	180	}
253		181
254	static void aio_grp_dec (aio_req grp)	182	static void req_submit (eio_req *req)
255	{	183	{
256	--grp->length;	184	eio_submit (req);
257		185
258	/* call feeder, if applicable */	186	if (on_next_submit)
259	aio_grp_feed (grp);
260
261	/* finish, if done */
262	if (!grp->length && grp->fd)
263	{	187	{
264	req_invoke (grp);	188	dSP;
265	req_free (grp);	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);
266	}	196	}
267	}	197	}
268		198
269	static void poll_wait ()	199	static int req_invoke (eio_req *req)
270	{	200	{
271	fd_set rfd;	201	dSP;
272		202
273	while (nreqs)	203	if (req->flags & FLAG_SV2_RO_OFF)
		204	SvREADONLY_off (req->sv2);
		205
		206	if (!EIO_CANCELLED (req) && SvOK (req->callback))
274	{	207	{
275	int size;
276	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
277	pthread_mutex_lock (&reslock);
278	#endif
279	size = res_queue.size;
280	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
281	pthread_mutex_unlock (&reslock);
282	#endif
283
284	if (size)
285	return;
286
287	FD_ZERO(&rfd);
288	FD_SET(respipe [0], &rfd);
289
290	select (respipe [0] + 1, &rfd, 0, 0, 0);
291	}
292	}
293
294	static void req_invoke (aio_req req)
295	{
296	dSP;
297
298	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
299	{
300	errno = req->errorno;
301
302	ENTER;	208	ENTER;
303	SAVETMPS;	209	SAVETMPS;
304	PUSHMARK (SP);	210	PUSHMARK (SP);
305	EXTEND (SP, 1);	211	EXTEND (SP, 1);
306		212
307	switch (req->type)	213	switch (req->type)
308	{	214	{
309	case REQ_READDIR:	215	case EIO_READDIR:
310	{	216	{
311	SV *rv = &PL_sv_undef;	217	SV *rv = &PL_sv_undef;
312		218
313	if (req->result >= 0)	219	if (req->result >= 0)
314	{	220	{
		221	int i;
315	char *buf = req->data2ptr;	222	char *buf = req->ptr2;
316	AV *av = newAV ();	223	AV *av = newAV ();
317		224
318	while (req->result)	225	av_extend (av, req->result - 1);
		226
		227	for (i = 0; i < req->result; ++i)
319	{	228	{
320	SV *sv = newSVpv (buf, 0);	229	SV *sv = newSVpv (buf, 0);
321		230
322	av_push (av, sv);	231	av_store (av, i, sv);
323	buf += SvCUR (sv) + 1;	232	buf += SvCUR (sv) + 1;
324	req->result--;
325	}	233	}
326		234
327	rv = sv_2mortal (newRV_noinc ((SV *)av));	235	rv = sv_2mortal (newRV_noinc ((SV *)av));
328	}	236	}
329		237
330	PUSHs (rv);	238	PUSHs (rv);
331	}	239	}
332	break;	240	break;
333		241
334	case REQ_OPEN:	242	case EIO_OPEN:
335	{	243	{
336	/* convert fd to fh */	244	/* convert fd to fh */
337	SV *fh;	245	SV *fh = &PL_sv_undef;
338		246
339	PUSHs (sv_2mortal (newSViv (req->result)));	247	if (req->result >= 0)
340	PUTBACK;	248	{
341	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	249	GV *gv = (GV *)sv_newmortal ();
342	SPAGAIN;	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);
343		256
344	fh = SvREFCNT_inc (POPs);	257	symlen = snprintf (
		258	sym,
		259	sizeof (sym),
		260	"%s&=%d",
		261	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		262	req->result
		263	);
345		264
		265	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		266	fh = (SV *)gv;
		267	}
		268
346	PUSHMARK (SP);	269	PUSHs (fh);
347	XPUSHs (sv_2mortal (fh));
348	}	270	}
349	break;	271	break;
350		272
351	case REQ_GROUP:	273	case EIO_GROUP:
352	req->fd = 2; /* mark group as finished */	274	req->int1 = 2; /* mark group as finished */
353		275
354	if (req->data)	276	if (req->sv1)
355	{	277	{
356	int i;	278	int i;
357	AV *av = (AV *)req->data;	279	AV *av = (AV *)req->sv1;
358		280
359	EXTEND (SP, AvFILL (av) + 1);	281	EXTEND (SP, AvFILL (av) + 1);
360	for (i = 0; i <= AvFILL (av); ++i)	282	for (i = 0; i <= AvFILL (av); ++i)
361	PUSHs (*av_fetch (av, i, 0));	283	PUSHs (*av_fetch (av, i, 0));
362	}	284	}
363	break;	285	break;
364		286
365	case REQ_NOP:	287	case EIO_NOP:
366	case REQ_BUSY:	288	case EIO_BUSY:
367	break;	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 */
368		315
369	default:	316	default:
370	PUSHs (sv_2mortal (newSViv (req->result)));	317	PUSHs (sv_2mortal (newSViv (req->result)));
371	break;	318	break;
372	}	319	}
373		320
		321	errno = req->errorno;
374		322
375	PUTBACK;	323	PUTBACK;
376	call_sv (req->callback, G_VOID | G_EVAL);	324	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
377	SPAGAIN;	325	SPAGAIN;
378		326
379	FREETMPS;	327	FREETMPS;
380	LEAVE;	328	LEAVE;
		329
		330	PUTBACK;
381	}	331	}
382		332
383	if (req->grp)	333	return !!SvTRUE (ERRSV);
384	{
385	aio_req grp = req->grp;
386
387	/* unlink request */
388	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
389	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
390
391	if (grp->grp_first == req)
392	grp->grp_first = req->grp_next;
393
394	aio_grp_dec (grp);
395	}
396
397	if (SvTRUE (ERRSV))
398	{
399	req_free (req);
400	croak (0);
401	}
402	}	334	}
403		335
404	static void req_free (aio_req req)	336	static void req_destroy (aio_req req)
405	{	337	{
406	if (req->self)	338	if (req->self)
407	{	339	{
408	sv_unmagic (req->self, PERL_MAGIC_ext);	340	sv_unmagic (req->self, PERL_MAGIC_ext);
409	SvREFCNT_dec (req->self);	341	SvREFCNT_dec (req->self);
410	}	342	}
411		343
412	SvREFCNT_dec (req->data);
413	SvREFCNT_dec (req->fh);	344	SvREFCNT_dec (req->sv1);
414	SvREFCNT_dec (req->fh2);	345	SvREFCNT_dec (req->sv2);
415	SvREFCNT_dec (req->callback);	346	SvREFCNT_dec (req->callback);
416	Safefree (req->statdata);
417
418	if (req->type == REQ_READDIR && req->result >= 0)
419	free (req->data2ptr);
420		347
421	Safefree (req);	348	Safefree (req);
422	}	349	}
423		350
424	static void req_cancel (aio_req req)	351	static void req_cancel_subs (aio_req grp)
425	{	352	{
426	req->flags |= FLAG_CANCELLED;	353	aio_req sub;
427		354
428	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)
429	{	386	{
430	aio_req sub;	387	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		388	croak ("unable to initialize result pipe(2)");
431		389
432	for (sub = req->grp_first; sub; sub = sub->grp_next)	390	respipe_close (respipe [0]);
433	req_cancel (sub);	391	respipe [0] = old_readfd;
434	}	392	}
435	}
436		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
437	static int poll_cb ()	432	static int poll_cb (void)
438	{	433	{
439	dSP;
440	int count = 0;
441	int do_croak = 0;
442	aio_req req;
443
444	for (;;)	434	for (;;)
445	{	435	{
446	pthread_mutex_lock (&reslock);	436	int res = eio_poll ();
447	req = reqq_shift (&res_queue);
448		437
449	if (req)	438	if (res > 0)
450	{
451	if (!res_queue.size)
452	{
453	/* read any signals sent by the worker threads */
454	char buf [32];
455	while (read (respipe [0], buf, 32) == 32)
456	;
457	}
458	}
459
460	pthread_mutex_unlock (&reslock);
461
462	if (!req)
463	break;	439	croak (0);
464		440
465	--nreqs;	441	if (!max_outstanding || max_outstanding > eio_nreqs ())
		442	return res;
466		443
467	if (req->type == REQ_QUIT)	444	poll_wait ();
468	started--;
469	else if (req->type == REQ_GROUP && req->length)
470	{
471	req->fd = 1; /* mark request as delayed */
472	continue;
473	}
474	else
475	{
476	if (req->type == REQ_READ)
477	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
478
479	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
480	SvREADONLY_off (req->data);
481
482	if (req->statdata)
483	{
484	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
485	PL_laststatval = req->result;
486	PL_statcache = *(req->statdata);
487	}
488
489	req_invoke (req);
490
491	count++;
492	}
493
494	req_free (req);
495	}	445	}
496
497	return count;
498	}
499
500	static void *aio_proc(void *arg);
501
502	static void start_thread (void)
503	{
504	sigset_t fullsigset, oldsigset;
505	pthread_t tid;
506	pthread_attr_t attr;
507
508	pthread_attr_init (&attr);
509	pthread_attr_setstacksize (&attr, STACKSIZE);
510	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
511
512	sigfillset (&fullsigset);
513	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
514
515	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
516	started++;
517
518	sigprocmask (SIG_SETMASK, &oldsigset, 0);
519	}
520
521	static void req_send (aio_req req)
522	{
523	while (started < wanted && nreqs >= started)
524	start_thread ();
525
526	++nreqs;
527
528	pthread_mutex_lock (&reqlock);
529	reqq_push (&req_queue, req);
530	pthread_cond_signal (&reqwait);
531	pthread_mutex_unlock (&reqlock);
532
533	if (nreqs > max_outstanding)
534	for (;;)
535	{
536	poll_cb ();
537
538	if (nreqs <= max_outstanding)
539	break;
540
541	poll_wait ();
542	}
543	}
544
545	static void end_thread (void)
546	{
547	aio_req req;
548
549	Newz (0, req, 1, aio_cb);
550
551	req->type = REQ_QUIT;
552	req->pri = PRI_MAX + PRI_BIAS;
553
554	req_send (req);
555	}
556
557	static void min_parallel (int nthreads)
558	{
559	if (wanted < nthreads)
560	wanted = nthreads;
561	}
562
563	static void max_parallel (int nthreads)
564	{
565	int cur = started;
566
567	if (wanted > nthreads)
568	wanted = nthreads;
569
570	while (cur > wanted)
571	{
572	end_thread ();
573	cur--;
574	}
575
576	while (started > wanted)
577	{
578	poll_wait ();
579	poll_cb ();
580	}
581	}
582
583	static void create_pipe ()
584	{
585	if (pipe (respipe))
586	croak ("unable to initialize result pipe");
587
588	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
589	croak ("cannot set result pipe to nonblocking mode");
590
591	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
592	croak ("cannot set result pipe to nonblocking mode");
593	}
594
595	/*****************************************************************************/
596	/* work around various missing functions */
597
598	#if !HAVE_PREADWRITE
599	# define pread aio_pread
600	# define pwrite aio_pwrite
601
602	/*
603	* make our pread/pwrite safe against themselves, but not against
604	* normal read/write by using a mutex. slows down execution a lot,
605	* but that's your problem, not mine.
606	*/
607	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
608
609	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
610	{
611	ssize_t res;
612	off_t ooffset;
613
614	pthread_mutex_lock (&preadwritelock);
615	ooffset = lseek (fd, 0, SEEK_CUR);
616	lseek (fd, offset, SEEK_SET);
617	res = read (fd, buf, count);
618	lseek (fd, ooffset, SEEK_SET);
619	pthread_mutex_unlock (&preadwritelock);
620
621	return res;
622	}
623
624	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
625	{
626	ssize_t res;
627	off_t ooffset;
628
629	pthread_mutex_lock (&preadwritelock);
630	ooffset = lseek (fd, 0, SEEK_CUR);
631	lseek (fd, offset, SEEK_SET);
632	res = write (fd, buf, count);
633	lseek (fd, offset, SEEK_SET);
634	pthread_mutex_unlock (&preadwritelock);
635
636	return res;
637	}
638	#endif
639
640	#if !HAVE_FDATASYNC
641	# define fdatasync fsync
642	#endif
643
644	#if !HAVE_READAHEAD
645	# define readahead aio_readahead
646
647	static ssize_t readahead (int fd, off_t offset, size_t count)
648	{
649	dBUF;
650
651	while (count > 0)
652	{
653	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
654
655	pread (fd, aio_buf, len, offset);
656	offset += len;
657	count -= len;
658	}
659
660	fBUF;
661
662	errno = 0;
663	}
664	#endif
665
666	#if !HAVE_READDIR_R
667	# define readdir_r aio_readdir_r
668
669	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
670
671	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
672	{
673	struct dirent *e;
674	int errorno;
675
676	pthread_mutex_lock (&readdirlock);
677
678	e = readdir (dirp);
679	errorno = errno;
680
681	if (e)
682	{
683	*res = ent;
684	strcpy (ent->d_name, e->d_name);
685	}
686	else
687	*res = 0;
688
689	pthread_mutex_unlock (&readdirlock);
690
691	errno = errorno;
692	return e ? 0 : -1;
693	}
694	#endif
695
696	/* sendfile always needs emulation */
697	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
698	{
699	ssize_t res;
700
701	if (!count)
702	return 0;
703
704	#if HAVE_SENDFILE
705	# if __linux
706	res = sendfile (ofd, ifd, &offset, count);
707
708	# elif __freebsd
709	/*
710	* Of course, the freebsd sendfile is a dire hack with no thoughts
711	* wasted on making it similar to other I/O functions.
712	*/
713	{
714	off_t sbytes;
715	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
716
717	if (res < 0 && sbytes)
718	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
719	res = sbytes;
720	}
721
722	# elif __hpux
723	res = sendfile (ofd, ifd, offset, count, 0, 0);
724
725	# elif __solaris
726	{
727	struct sendfilevec vec;
728	size_t sbytes;
729
730	vec.sfv_fd = ifd;
731	vec.sfv_flag = 0;
732	vec.sfv_off = offset;
733	vec.sfv_len = count;
734
735	res = sendfilev (ofd, &vec, 1, &sbytes);
736
737	if (res < 0 && sbytes)
738	res = sbytes;
739	}
740
741	# endif
742	#else
743	res = -1;
744	errno = ENOSYS;
745	#endif
746
747	if (res < 0
748	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
749	#if __solaris
750	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
751	#endif
752	)
753	)
754	{
755	/* emulate sendfile. this is a major pain in the ass */
756	dBUF;
757
758	res = 0;
759
760	while (count)
761	{
762	ssize_t cnt;
763
764	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
765
766	if (cnt <= 0)
767	{
768	if (cnt && !res) res = -1;
769	break;
770	}
771
772	cnt = write (ofd, aio_buf, cnt);
773
774	if (cnt <= 0)
775	{
776	if (cnt && !res) res = -1;
777	break;
778	}
779
780	offset += cnt;
781	res += cnt;
782	count -= cnt;
783	}
784
785	fBUF;
786	}
787
788	return res;
789	}
790
791	/* read a full directory */
792	static int scandir_ (const char *path, void **namesp)
793	{
794	DIR *dirp;
795	union
796	{
797	struct dirent d;
798	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
799	} *u;
800	struct dirent *entp;
801	char *name, *names;
802	int memlen = 4096;
803	int memofs = 0;
804	int res = 0;
805	int errorno;
806
807	dirp = opendir (path);
808	if (!dirp)
809	return -1;
810
811	u = malloc (sizeof (*u));
812	names = malloc (memlen);
813
814	if (u && names)
815	for (;;)
816	{
817	errno = 0;
818	readdir_r (dirp, &u->d, &entp);
819
820	if (!entp)
821	break;
822
823	name = entp->d_name;
824
825	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
826	{
827	int len = strlen (name) + 1;
828
829	res++;
830
831	while (memofs + len > memlen)
832	{
833	memlen *= 2;
834	names = realloc (names, memlen);
835	if (!names)
836	break;
837	}
838
839	memcpy (names + memofs, name, len);
840	memofs += len;
841	}
842	}
843
844	errorno = errno;
845	free (u);
846	closedir (dirp);
847
848	if (errorno)
849	{
850	free (names);
851	errno = errorno;
852	res = -1;
853	}
854
855	*namesp = (void *)names;
856	return res;
857	}
858
859	/*****************************************************************************/
860
861	static void *aio_proc (void *thr_arg)
862	{
863	aio_req req;
864	int type;
865
866	do
867	{
868	pthread_mutex_lock (&reqlock);
869
870	for (;;)
871	{
872	req = reqq_shift (&req_queue);
873
874	if (req)
875	break;
876
877	pthread_cond_wait (&reqwait, &reqlock);
878	}
879
880	pthread_mutex_unlock (&reqlock);
881
882	errno = 0; /* strictly unnecessary */
883	type = req->type; /* remember type for QUIT check */
884
885	if (!(req->flags & FLAG_CANCELLED))
886	switch (type)
887	{
888	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
889	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
890
891	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
892	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
893
894	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
895	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
896	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
897
898	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
899	case REQ_CLOSE: req->result = close (req->fd); break;
900	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
901	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
902	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
903	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
904	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
905
906	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
907	case REQ_FSYNC: req->result = fsync (req->fd); break;
908	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
909
910	case REQ_BUSY:
911	{
912	struct timeval tv;
913
914	tv.tv_sec = req->fd;
915	tv.tv_usec = req->fd2;
916
917	req->result = select (0, 0, 0, 0, &tv);
918	}
919
920	case REQ_GROUP:
921	case REQ_NOP:
922	case REQ_QUIT:
923	break;
924
925	default:
926	req->result = ENOSYS;
927	break;
928	}
929
930	req->errorno = errno;
931
932	pthread_mutex_lock (&reslock);
933
934	if (!reqq_push (&res_queue, req))
935	/* write a dummy byte to the pipe so fh becomes ready */
936	write (respipe [1], &respipe, 1);
937
938	pthread_mutex_unlock (&reslock);
939	}
940	while (type != REQ_QUIT);
941
942	return 0;
943	}
944
945	/*****************************************************************************/
946
947	static void atfork_prepare (void)
948	{
949	pthread_mutex_lock (&reqlock);
950	pthread_mutex_lock (&reslock);
951	#if !HAVE_PREADWRITE
952	pthread_mutex_lock (&preadwritelock);
953	#endif
954	#if !HAVE_READDIR_R
955	pthread_mutex_lock (&readdirlock);
956	#endif
957	}
958
959	static void atfork_parent (void)
960	{
961	#if !HAVE_READDIR_R
962	pthread_mutex_unlock (&readdirlock);
963	#endif
964	#if !HAVE_PREADWRITE
965	pthread_mutex_unlock (&preadwritelock);
966	#endif
967	pthread_mutex_unlock (&reslock);
968	pthread_mutex_unlock (&reqlock);
969	}	446	}
970		447
971	static void atfork_child (void)	448	static void atfork_child (void)
972	{	449	{
973	aio_req prv;
974
975	started = 0;
976
977	while (prv = reqq_shift (&req_queue))
978	req_free (prv);
979
980	while (prv = reqq_shift (&res_queue))
981	req_free (prv);
982
983	close (respipe [0]);
984	close (respipe [1]);
985	create_pipe ();	450	create_respipe ();
986
987	atfork_parent ();
988	}	451	}
989		452
990	#define dREQ \	453	#define dREQ \
991	aio_req req; \	454	aio_req req; \
992	int req_pri = next_pri; \	455	int req_pri = next_pri; \
993	next_pri = DEFAULT_PRI + PRI_BIAS; \	456	next_pri = EIO_PRI_DEFAULT; \
994	\	457	\
995	if (SvOK (callback) && !SvROK (callback)) \	458	if (SvOK (callback) && !SvROK (callback)) \
996	croak ("callback must be undef or of reference type"); \	459	croak ("callback must be undef or of reference type"); \
997	\	460	\
998	Newz (0, req, 1, aio_cb); \	461	Newz (0, req, 1, eio_req); \
999	if (!req) \	462	if (!req) \
1000	croak ("out of memory during aio_req allocation"); \	463	croak ("out of memory during eio_req allocation"); \
1001	\	464	\
1002	req->callback = newSVsv (callback); \	465	req->callback = newSVsv (callback); \
1003	req->pri = req_pri	466	req->pri = req_pri
1004		467
1005	#define REQ_SEND \	468	#define REQ_SEND \
1006	req_send (req); \	469	req_submit (req); \
1007	\	470	\
1008	if (GIMME_V != G_VOID) \	471	if (GIMME_V != G_VOID) \
1009	XPUSHs (req_sv (req, AIO_REQ_KLASS));	472	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1010		473
1011	MODULE = IO::AIO PACKAGE = IO::AIO	474	MODULE = IO::AIO PACKAGE = IO::AIO
1012		475
1013	PROTOTYPES: ENABLE	476	PROTOTYPES: ENABLE
1014		477
1015	BOOT:	478	BOOT:
1016	{	479	{
1017	HV *stash = gv_stashpv ("IO::AIO", 1);	480	stash = gv_stashpv ("IO::AIO", 1);
		481
1018	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	482	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1019	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	483	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1020	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	484	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		485	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		486	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		487	#ifndef _WIN32
		488	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		489	#endif
1021		490
1022	create_pipe ();	491	create_respipe ();
1023	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1024	}
1025		492
		493	if (eio_init (want_poll, done_poll) < 0)
		494	croak ("IO::AIO: unable to initialise eio library");
		495
		496	/* atfork child called in fifo order, so before eio's handler */
		497	X_THREAD_ATFORK (0, 0, atfork_child);
		498	}
		499
1026	void	500	void
1027	min_parallel (nthreads)	501	max_poll_reqs (int nreqs)
1028	int nthreads
1029	PROTOTYPE: $	502	PROTOTYPE: $
		503	CODE:
		504	eio_set_max_poll_reqs (nreqs);
1030		505
1031	void	506	void
1032	max_parallel (nthreads)	507	max_poll_time (double nseconds)
1033	int nthreads
1034	PROTOTYPE: $	508	PROTOTYPE: $
1035
1036	int
1037	max_outstanding (nreqs)
1038	int nreqs
1039	PROTOTYPE: $
1040	CODE:	509	CODE:
1041	RETVAL = max_outstanding;	510	eio_set_max_poll_time (nseconds);
		511
		512	void
		513	min_parallel (int nthreads)
		514	PROTOTYPE: $
		515	CODE:
		516	eio_set_min_parallel (nthreads);
		517
		518	void
		519	max_parallel (int nthreads)
		520	PROTOTYPE: $
		521	CODE:
		522	eio_set_max_parallel (nthreads);
		523
		524	void
		525	max_idle (int nthreads)
		526	PROTOTYPE: $
		527	CODE:
		528	eio_set_max_idle (nthreads);
		529
		530	void
		531	max_outstanding (int maxreqs)
		532	PROTOTYPE: $
		533	CODE:
1042	max_outstanding = nreqs;	534	max_outstanding = maxreqs;
1043		535
1044	void	536	void
1045	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	537	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1046	SV * pathname
1047	int flags
1048	int mode
1049	SV * callback
1050	PROTOTYPE: $$$;$	538	PROTOTYPE: $$$;$
1051	PPCODE:	539	PPCODE:
1052	{	540	{
1053	dREQ;	541	dREQ;
1054		542
1055	req->type = REQ_OPEN;	543	req->type = EIO_OPEN;
1056	req->data = newSVsv (pathname);	544	req->sv1 = newSVsv (pathname);
1057	req->dataptr = SvPVbyte_nolen (req->data);	545	req->ptr1 = SvPVbyte_nolen (req->sv1);
1058	req->fd = flags;	546	req->int1 = flags;
1059	req->mode = mode;	547	req->int2 = mode;
1060		548
1061	REQ_SEND;	549	REQ_SEND;
1062	}	550	}
1063		551
1064	void	552	void
1065	aio_close (fh,callback=&PL_sv_undef)	553	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1066	SV * fh
1067	SV * callback
1068	PROTOTYPE: $;$	554	PROTOTYPE: $;$
1069	ALIAS:	555	ALIAS:
1070	aio_close = REQ_CLOSE
1071	aio_fsync = REQ_FSYNC	556	aio_fsync = EIO_FSYNC
1072	aio_fdatasync = REQ_FDATASYNC	557	aio_fdatasync = EIO_FDATASYNC
1073	PPCODE:	558	PPCODE:
1074	{	559	{
1075	dREQ;	560	dREQ;
1076		561
1077	req->type = ix;	562	req->type = ix;
1078	req->fh = newSVsv (fh);	563	req->sv1 = newSVsv (fh);
1079	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	564	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1080		565
1081	REQ_SEND (req);	566	REQ_SEND (req);
1082	}	567	}
1083		568
1084	void	569	void
		570	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		571	PROTOTYPE: $;$
		572	PPCODE:
		573	{
		574	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		575	dREQ;
		576
		577	if (close_pipe < 0)
		578	{
		579	int pipefd [2];
		580
		581	if (pipe (pipefd) < 0
		582	|| close (pipefd [1]) < 0
		583	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		584	abort (); /*D*/
		585
		586	close_pipe = pipefd [0];
		587	}
		588
		589	req->type = EIO_DUP2;
		590	req->int1 = close_pipe;
		591	req->sv2 = newSVsv (fh);
		592	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		593
		594	REQ_SEND (req);
		595	}
		596
		597	void
1085	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	598	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1086	SV * fh
1087	UV offset
1088	UV length
1089	SV * data
1090	UV dataoffset
1091	SV * callback
1092	ALIAS:	599	ALIAS:
1093	aio_read = REQ_READ	600	aio_read = EIO_READ
1094	aio_write = REQ_WRITE	601	aio_write = EIO_WRITE
1095	PROTOTYPE: $$$$$;$	602	PROTOTYPE: $$$$$;$
1096	PPCODE:	603	PPCODE:
1097	{	604	{
1098	aio_req req;
1099	STRLEN svlen;	605	STRLEN svlen;
1100	char *svptr = SvPVbyte (data, svlen);	606	char *svptr = SvPVbyte (data, svlen);
		607	UV len = SvUV (length);
1101		608
1102	SvUPGRADE (data, SVt_PV);	609	SvUPGRADE (data, SVt_PV);
1103	SvPOK_on (data);	610	SvPOK_on (data);
1104		611
1105	if (dataoffset < 0)	612	if (dataoffset < 0)
1106	dataoffset += svlen;	613	dataoffset += svlen;
1107		614
1108	if (dataoffset < 0 || dataoffset > svlen)	615	if (dataoffset < 0 || dataoffset > svlen)
1109	croak ("data offset outside of string");	616	croak ("dataoffset outside of data scalar");
1110		617
1111	if (ix == REQ_WRITE)	618	if (ix == EIO_WRITE)
1112	{	619	{
1113	/* write: check length and adjust. */	620	/* write: check length and adjust. */
1114	if (length < 0 || length + dataoffset > svlen)	621	if (!SvOK (length) || len + dataoffset > svlen)
1115	length = svlen - dataoffset;	622	len = svlen - dataoffset;
1116	}	623	}
1117	else	624	else
1118	{	625	{
1119	/* read: grow scalar as necessary */	626	/* read: grow scalar as necessary */
1120	svptr = SvGROW (data, length + dataoffset);	627	svptr = SvGROW (data, len + dataoffset + 1);
1121	}	628	}
1122		629
1123	if (length < 0)	630	if (len < 0)
1124	croak ("length must not be negative");	631	croak ("length must not be negative");
1125		632
1126	{	633	{
1127	dREQ;	634	dREQ;
1128		635
1129	req->type = ix;	636	req->type = ix;
1130	req->fh = newSVsv (fh);	637	req->sv1 = newSVsv (fh);
1131	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	638	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1132	: IoOFP (sv_2io (fh)));	639	: IoOFP (sv_2io (fh)));
		640	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1133	req->offset = offset;	641	req->size = len;
1134	req->length = length;
1135	req->data = SvREFCNT_inc (data);	642	req->sv2 = SvREFCNT_inc (data);
1136	req->dataptr = (char *)svptr + dataoffset;	643	req->ptr2 = (char *)svptr + dataoffset;
		644	req->stroffset = dataoffset;
1137		645
1138	if (!SvREADONLY (data))	646	if (!SvREADONLY (data))
1139	{	647	{
1140	SvREADONLY_on (data);	648	SvREADONLY_on (data);
1141	req->data2ptr = (void *)data;	649	req->flags |= FLAG_SV2_RO_OFF;
1142	}	650	}
1143		651
1144	REQ_SEND;	652	REQ_SEND;
1145	}	653	}
1146	}	654	}
1147		655
1148	void	656	void
		657	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		658	PROTOTYPE: $$;$
		659	PPCODE:
		660	{
		661	SV *data;
		662	dREQ;
		663
		664	req->type = EIO_READLINK;
		665	req->sv1 = newSVsv (path);
		666	req->ptr1 = SvPVbyte_nolen (req->sv1);
		667
		668	REQ_SEND;
		669	}
		670
		671	void
1149	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	672	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1150	SV * out_fh
1151	SV * in_fh
1152	UV in_offset
1153	UV length
1154	SV * callback
1155	PROTOTYPE: $$$$;$	673	PROTOTYPE: $$$$;$
1156	PPCODE:	674	PPCODE:
1157	{	675	{
1158	dREQ;	676	dREQ;
1159		677
1160	req->type = REQ_SENDFILE;	678	req->type = EIO_SENDFILE;
1161	req->fh = newSVsv (out_fh);	679	req->sv1 = newSVsv (out_fh);
1162	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	680	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1163	req->fh2 = newSVsv (in_fh);	681	req->sv2 = newSVsv (in_fh);
1164	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	682	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1165	req->offset = in_offset;	683	req->offs = SvVAL64 (in_offset);
1166	req->length = length;	684	req->size = length;
1167		685
1168	REQ_SEND;	686	REQ_SEND;
1169	}	687	}
1170		688
1171	void	689	void
1172	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	690	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1173	SV * fh
1174	UV offset
1175	IV length
1176	SV * callback
1177	PROTOTYPE: $$$;$	691	PROTOTYPE: $$$;$
1178	PPCODE:	692	PPCODE:
1179	{	693	{
1180	dREQ;	694	dREQ;
1181		695
1182	req->type = REQ_READAHEAD;	696	req->type = EIO_READAHEAD;
1183	req->fh = newSVsv (fh);	697	req->sv1 = newSVsv (fh);
1184	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	698	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1185	req->offset = offset;	699	req->offs = SvVAL64 (offset);
1186	req->length = length;	700	req->size = length;
1187		701
1188	REQ_SEND;	702	REQ_SEND;
1189	}	703	}
1190		704
1191	void	705	void
1192	aio_stat (fh_or_path,callback=&PL_sv_undef)	706	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1193	SV * fh_or_path
1194	SV * callback
1195	ALIAS:	707	ALIAS:
1196	aio_stat = REQ_STAT	708	aio_stat = EIO_STAT
1197	aio_lstat = REQ_LSTAT	709	aio_lstat = EIO_LSTAT
1198	PPCODE:	710	PPCODE:
1199	{	711	{
1200	dREQ;	712	dREQ;
1201		713
1202	New (0, req->statdata, 1, Stat_t);	714	req->sv1 = newSVsv (fh_or_path);
1203	if (!req->statdata)
1204	{
1205	req_free (req);
1206	croak ("out of memory during aio_req->statdata allocation");
1207	}
1208		715
1209	if (SvPOK (fh_or_path))	716	if (SvPOK (req->sv1))
1210	{	717	{
1211	req->type = ix;	718	req->type = ix;
1212	req->data = newSVsv (fh_or_path);
1213	req->dataptr = SvPVbyte_nolen (req->data);	719	req->ptr1 = SvPVbyte_nolen (req->sv1);
1214	}	720	}
1215	else	721	else
1216	{	722	{
1217	req->type = REQ_FSTAT;	723	req->type = EIO_FSTAT;
1218	req->fh = newSVsv (fh_or_path);
1219	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	724	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1220	}	725	}
1221		726
1222	REQ_SEND;	727	REQ_SEND;
1223	}	728	}
1224		729
1225	void	730	void
		731	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		732	PPCODE:
		733	{
		734	dREQ;
		735
		736	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		737	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		738	req->sv1 = newSVsv (fh_or_path);
		739
		740	if (SvPOK (req->sv1))
		741	{
		742	req->type = EIO_UTIME;
		743	req->ptr1 = SvPVbyte_nolen (req->sv1);
		744	}
		745	else
		746	{
		747	req->type = EIO_FUTIME;
		748	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		749	}
		750
		751	REQ_SEND;
		752	}
		753
		754	void
		755	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		756	PPCODE:
		757	{
		758	dREQ;
		759
		760	req->sv1 = newSVsv (fh_or_path);
		761	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		762
		763	if (SvPOK (req->sv1))
		764	{
		765	req->type = EIO_TRUNCATE;
		766	req->ptr1 = SvPVbyte_nolen (req->sv1);
		767	}
		768	else
		769	{
		770	req->type = EIO_FTRUNCATE;
		771	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		772	}
		773
		774	REQ_SEND;
		775	}
		776
		777	void
		778	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		779	ALIAS:
		780	aio_chmod = EIO_CHMOD
		781	aio_mkdir = EIO_MKDIR
		782	PPCODE:
		783	{
		784	dREQ;
		785
		786	req->int2 = mode;
		787	req->sv1 = newSVsv (fh_or_path);
		788
		789	if (SvPOK (req->sv1))
		790	{
		791	req->type = ix;
		792	req->ptr1 = SvPVbyte_nolen (req->sv1);
		793	}
		794	else
		795	{
		796	req->type = EIO_FCHMOD;
		797	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		798	}
		799
		800	REQ_SEND;
		801	}
		802
		803	void
		804	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		805	PPCODE:
		806	{
		807	dREQ;
		808
		809	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		810	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		811	req->sv1 = newSVsv (fh_or_path);
		812
		813	if (SvPOK (req->sv1))
		814	{
		815	req->type = EIO_CHOWN;
		816	req->ptr1 = SvPVbyte_nolen (req->sv1);
		817	}
		818	else
		819	{
		820	req->type = EIO_FCHOWN;
		821	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		822	}
		823
		824	REQ_SEND;
		825	}
		826
		827	void
1226	aio_unlink (pathname,callback=&PL_sv_undef)	828	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1227	SV * pathname
1228	SV * callback
1229	ALIAS:	829	ALIAS:
1230	aio_unlink = REQ_UNLINK	830	aio_unlink = EIO_UNLINK
1231	aio_rmdir = REQ_RMDIR	831	aio_rmdir = EIO_RMDIR
1232	aio_readdir = REQ_READDIR	832	aio_readdir = EIO_READDIR
1233	PPCODE:	833	PPCODE:
1234	{	834	{
1235	dREQ;	835	dREQ;
1236		836
1237	req->type = ix;	837	req->type = ix;
1238	req->data = newSVsv (pathname);	838	req->sv1 = newSVsv (pathname);
1239	req->dataptr = SvPVbyte_nolen (req->data);	839	req->ptr1 = SvPVbyte_nolen (req->sv1);
		840
		841	REQ_SEND;
		842	}
		843
		844	void
		845	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		846	ALIAS:
		847	aio_link = EIO_LINK
		848	aio_symlink = EIO_SYMLINK
		849	aio_rename = EIO_RENAME
		850	PPCODE:
		851	{
		852	dREQ;
		853
		854	req->type = ix;
		855	req->sv1 = newSVsv (oldpath);
		856	req->ptr1 = SvPVbyte_nolen (req->sv1);
		857	req->sv2 = newSVsv (newpath);
		858	req->ptr2 = SvPVbyte_nolen (req->sv2);
1240		859
1241	REQ_SEND;	860	REQ_SEND;
1242	}	861	}
1243		862
1244	void	863	void
1245	aio_link (oldpath,newpath,callback=&PL_sv_undef)	864	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1246	SV * oldpath
1247	SV * newpath
1248	SV * callback
1249	ALIAS:
1250	aio_link = REQ_LINK
1251	aio_symlink = REQ_SYMLINK
1252	aio_rename = REQ_RENAME
1253	PPCODE:	865	PPCODE:
1254	{	866	{
1255	dREQ;	867	dREQ;
1256		868
1257	req->type = ix;	869	req->type = EIO_MKNOD;
1258	req->fh = newSVsv (oldpath);	870	req->sv1 = newSVsv (pathname);
1259	req->data2ptr = SvPVbyte_nolen (req->fh);	871	req->ptr1 = SvPVbyte_nolen (req->sv1);
1260	req->data = newSVsv (newpath);	872	req->int2 = (mode_t)mode;
1261	req->dataptr = SvPVbyte_nolen (req->data);	873	req->offs = dev;
1262		874
1263	REQ_SEND;	875	REQ_SEND;
1264	}	876	}
1265		877
1266	void	878	void
1267	aio_busy (delay,callback=&PL_sv_undef)	879	aio_busy (double delay, SV *callback=&PL_sv_undef)
1268	double delay
1269	SV * callback
1270	PPCODE:	880	PPCODE:
1271	{	881	{
1272	dREQ;	882	dREQ;
1273		883
1274	req->type = REQ_BUSY;	884	req->type = EIO_BUSY;
1275	req->fd = delay < 0. ? 0 : delay;	885	req->nv1 = delay < 0. ? 0. : delay;
1276	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1277		886
1278	REQ_SEND;	887	REQ_SEND;
1279	}	888	}
1280		889
1281	void	890	void
1282	aio_group (callback=&PL_sv_undef)	891	aio_group (SV *callback=&PL_sv_undef)
1283	SV * callback
1284	PROTOTYPE: ;$	892	PROTOTYPE: ;$
1285	PPCODE:	893	PPCODE:
1286	{	894	{
1287	dREQ;	895	dREQ;
1288		896
1289	req->type = REQ_GROUP;	897	req->type = EIO_GROUP;
		898
1290	req_send (req);	899	eio_submit (req);
1291
1292	XPUSHs (req_sv (req, AIO_GRP_KLASS));	900	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1293	}	901	}
1294		902
1295	void	903	void
1296	aio_nop (callback=&PL_sv_undef)	904	aio_nop (SV *callback=&PL_sv_undef)
1297	SV * callback	905	ALIAS:
		906	aio_nop = EIO_NOP
		907	aio_sync = EIO_SYNC
1298	PPCODE:	908	PPCODE:
1299	{	909	{
1300	dREQ;	910	dREQ;
1301		911
1302	req->type = REQ_NOP;	912	req->type = ix;
1303		913
1304	REQ_SEND;	914	REQ_SEND;
1305	}	915	}
1306		916
1307	void	917	int
1308	aioreq_pri (int pri = DEFAULT_PRI)	918	aioreq_pri (int pri = 0)
1309	CODE:	919	PROTOTYPE: ;$
		920	CODE:
		921	RETVAL = next_pri;
		922	if (items > 0)
		923	{
1310	if (pri < PRI_MIN) pri = PRI_MIN;	924	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1311	if (pri > PRI_MAX) pri = PRI_MAX;	925	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1312	next_pri = pri + PRI_BIAS;	926	next_pri = pri;
		927	}
		928	OUTPUT:
		929	RETVAL
1313		930
1314	void	931	void
1315	aioreq_nice (int nice = 0)	932	aioreq_nice (int nice = 0)
1316	CODE:	933	CODE:
1317	nice = next_pri - nice;	934	nice = next_pri - nice;
1318	if (nice < PRI_MIN) nice = PRI_MIN;	935	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1319	if (nice > PRI_MAX) nice = PRI_MAX;	936	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1320	next_pri = nice + PRI_BIAS;	937	next_pri = nice;
1321		938
1322	void	939	void
1323	flush ()	940	flush ()
1324	PROTOTYPE:	941	PROTOTYPE:
1325	CODE:	942	CODE:
1326	while (nreqs)	943	while (eio_nreqs ())
1327	{	944	{
1328	poll_wait ();	945	poll_wait ();
1329	poll_cb ();	946	poll_cb ();
1330	}	947	}
1331		948
1332	void	949	int
1333	poll()	950	poll()
1334	PROTOTYPE:	951	PROTOTYPE:
1335	CODE:	952	CODE:
1336	if (nreqs)
1337	{
1338	poll_wait ();	953	poll_wait ();
1339	poll_cb ();	954	RETVAL = poll_cb ();
1340	}	955	OUTPUT:
		956	RETVAL
1341		957
1342	int	958	int
1343	poll_fileno()	959	poll_fileno()
1344	PROTOTYPE:	960	PROTOTYPE:
1345	CODE:	961	CODE:
…		…
1357		973
1358	void	974	void
1359	poll_wait()	975	poll_wait()
1360	PROTOTYPE:	976	PROTOTYPE:
1361	CODE:	977	CODE:
1362	if (nreqs)
1363	poll_wait ();	978	poll_wait ();
1364		979
1365	int	980	int
1366	nreqs()	981	nreqs()
1367	PROTOTYPE:	982	PROTOTYPE:
1368	CODE:	983	CODE:
1369	RETVAL = nreqs;	984	RETVAL = eio_nreqs ();
1370	OUTPUT:	985	OUTPUT:
1371	RETVAL	986	RETVAL
1372		987
		988	int
		989	nready()
		990	PROTOTYPE:
		991	CODE:
		992	RETVAL = eio_nready ();
		993	OUTPUT:
		994	RETVAL
		995
		996	int
		997	npending()
		998	PROTOTYPE:
		999	CODE:
		1000	RETVAL = eio_npending ();
		1001	OUTPUT:
		1002	RETVAL
		1003
		1004	int
		1005	nthreads()
		1006	PROTOTYPE:
		1007	CODE:
		1008	RETVAL = eio_nthreads ();
		1009	OUTPUT:
		1010	RETVAL
		1011
		1012	void _on_next_submit (SV *cb)
		1013	CODE:
		1014	SvREFCNT_dec (on_next_submit);
		1015	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1016
1373	PROTOTYPES: DISABLE	1017	PROTOTYPES: DISABLE
1374		1018
1375	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1019	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1376		1020
1377	void	1021	void
1378	cancel (aio_req_ornot req)	1022	cancel (aio_req_ornot req)
1379	CODE:	1023	CODE:
1380	req_cancel (req);	1024	eio_cancel (req);
1381		1025
1382	void	1026	void
1383	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1027	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1384	CODE:	1028	CODE:
1385	SvREFCNT_dec (req->callback);	1029	SvREFCNT_dec (req->callback);
…		…
1390	void	1034	void
1391	add (aio_req grp, ...)	1035	add (aio_req grp, ...)
1392	PPCODE:	1036	PPCODE:
1393	{	1037	{
1394	int i;	1038	int i;
1395	aio_req req;
1396		1039
1397	if (grp->fd == 2)	1040	if (grp->int1 == 2)
1398	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1041	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1399		1042
1400	for (i = 1; i < items; ++i )	1043	for (i = 1; i < items; ++i )
1401	{	1044	{
		1045	aio_req req;
		1046
1402	if (GIMME_V != G_VOID)	1047	if (GIMME_V != G_VOID)
1403	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1048	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1404		1049
1405	req = SvAIO_REQ (ST (i));	1050	req = SvAIO_REQ (ST (i));
1406		1051
1407	if (req)	1052	if (req)
1408	{	1053	eio_grp_add (grp, req);
1409	++grp->length;
1410	req->grp = grp;
1411
1412	req->grp_prev = 0;
1413	req->grp_next = grp->grp_first;
1414
1415	if (grp->grp_first)
1416	grp->grp_first->grp_prev = req;
1417
1418	grp->grp_first = req;
1419	}	1054	}
1420	}
1421	}	1055	}
		1056
		1057	void
		1058	cancel_subs (aio_req_ornot req)
		1059	CODE:
		1060	req_cancel_subs (req);
1422		1061
1423	void	1062	void
1424	result (aio_req grp, ...)	1063	result (aio_req grp, ...)
1425	CODE:	1064	CODE:
1426	{	1065	{
1427	int i;	1066	int i;
		1067	AV *av;
		1068
		1069	grp->errorno = errno;
		1070
1428	AV *av = newAV ();	1071	av = newAV ();
1429		1072
1430	for (i = 1; i < items; ++i )	1073	for (i = 1; i < items; ++i )
1431	av_push (av, newSVsv (ST (i)));	1074	av_push (av, newSVsv (ST (i)));
1432		1075
1433	SvREFCNT_dec (grp->data);	1076	SvREFCNT_dec (grp->sv1);
1434	grp->data = (SV *)av;	1077	grp->sv1 = (SV *)av;
1435	}	1078	}
		1079
		1080	void
		1081	errno (aio_req grp, int errorno = errno)
		1082	CODE:
		1083	grp->errorno = errorno;
1436		1084
1437	void	1085	void
1438	limit (aio_req grp, int limit)	1086	limit (aio_req grp, int limit)
1439	CODE:	1087	CODE:
1440	grp->fd2 = limit;	1088	eio_grp_limit (grp, limit);
1441	aio_grp_feed (grp);
1442		1089
1443	void	1090	void
1444	feed (aio_req grp, SV *callback=&PL_sv_undef)	1091	feed (aio_req grp, SV *callback=&PL_sv_undef)
1445	CODE:	1092	CODE:
1446	{	1093	{
1447	SvREFCNT_dec (grp->fh2);	1094	SvREFCNT_dec (grp->sv2);
1448	grp->fh2 = newSVsv (callback);	1095	grp->sv2 = newSVsv (callback);
1449		1096
1450	if (grp->fd2 <= 0)	1097	if (grp->int2 <= 0)
1451	grp->fd2 = 2;	1098	grp->int2 = 2;
1452		1099
1453	aio_grp_feed (grp);	1100	eio_grp_limit (grp, grp->int2);
1454	}	1101	}
1455		1102

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