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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.67 by root, Tue Oct 24 03:17:39 2006 UTC vs.
Revision 1.134 by root, Sun Apr 19 13:05:06 2009 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	/*****************************************************************************/
50	# define STACKSIZE 65536	86
51	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */	87	#if __GNUC__ >= 3
52	# define STACKSIZE PTHREAD_STACK_MIN	88	# define expect(expr,value) __builtin_expect ((expr),(value))
53	#else	89	#else
54	# define STACKSIZE 16384	90	# define expect(expr,value) (expr)
55	#endif	91	#endif
56		92
57	/* buffer size for various temporary buffers */	93	#define expect_false(expr) expect ((expr) != 0, 0)
58	#define AIO_BUFSIZE 65536	94	#define expect_true(expr) expect ((expr) != 0, 1)
59		95
60	#define dBUF \	96	/*****************************************************************************/
61	char *aio_buf = malloc (AIO_BUFSIZE); \
62	if (!aio_buf) \
63	return -1;
64		97
65	#define fBUF free (aio_buf)	98	static HV *stash;
66		99	typedef SV SV8; /* byte-sv, used for argument-checking */
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		100
81	#define AIO_REQ_KLASS "IO::AIO::REQ"	101	#define AIO_REQ_KLASS "IO::AIO::REQ"
82	#define AIO_GRP_KLASS "IO::AIO::GRP"	102	#define AIO_GRP_KLASS "IO::AIO::GRP"
83		103
84	typedef struct aio_cb	104	#define EIO_REQ_MEMBERS \
85	{
86	struct aio_cb *volatile next;
87
88	SV *data, *callback;	105	SV *callback; \
89	SV *fh, *fh2;	106	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;	107	STRLEN stroffset; \
97	int type;	108	SV *self;
98	int fd, fd2;
99	int errorno;
100	mode_t mode; /* open */
101		109
102	unsigned char flags;	110	#define EIO_NO_WRAPPERS 1
103	unsigned char pri;
104		111
105	SV *self; /* the perl counterpart of this request, if any */	112	#include "libeio/eio.h"
106	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	113
107	} aio_cb;	114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void req_destroy (eio_req *grp);
		117	#define EIO_DESTROY(req) req_destroy (req)
108		118
109	enum {	119	enum {
110	FLAG_CANCELLED = 0x01,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
111	};	121	};
112		122
		123	#include "libeio/eio.c"
		124
113	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
114	typedef aio_cb *aio_req_ornot;	126	typedef eio_req *aio_req_ornot;
115		127
116	enum {	128	static SV *on_next_submit;
117	PRI_MIN = -4,	129	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;	130	static int max_outstanding;
130	static int respipe [2];
131		131
132	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	132	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		133
138	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	134	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);	135	static void req_cancel (aio_req req);
197	static void req_free (aio_req req);	136
		137	static void want_poll (void)
		138	{
		139	/* write a dummy byte to the pipe so fh becomes ready */
		140	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		141	}
		142
		143	static void done_poll (void)
		144	{
		145	/* read any signals sent by the worker threads */
		146	char buf [4];
		147	while (respipe_read (respipe [0], buf, 4) == 4)
		148	;
		149	}
198		150
199	/* must be called at most once */	151	/* must be called at most once */
200	static SV *req_sv (aio_req req, const char *klass)	152	static SV *req_sv (aio_req req, const char *klass)
201	{	153	{
202	if (!req->self)	154	if (!req->self)
…		…
220	return mg ? (aio_req)mg->mg_ptr : 0;	172	return mg ? (aio_req)mg->mg_ptr : 0;
221	}	173	}
222		174
223	static void aio_grp_feed (aio_req grp)	175	static void aio_grp_feed (aio_req grp)
224	{	176	{
225	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	177	if (grp->sv2 && SvOK (grp->sv2))
226	{	178	{
227	int old_len = grp->length;
228
229	if (grp->fh2 && SvOK (grp->fh2))
230	{
231	dSP;	179	dSP;
232		180
233	ENTER;	181	ENTER;
234	SAVETMPS;	182	SAVETMPS;
235	PUSHMARK (SP);	183	PUSHMARK (SP);
236	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
237	PUTBACK;	185	PUTBACK;
238	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	186	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
239	SPAGAIN;	187	SPAGAIN;
240	FREETMPS;	188	FREETMPS;
241	LEAVE;	189	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	}	190	}
252	}	191	}
253		192
254	static void aio_grp_dec (aio_req grp)	193	static void req_submit (eio_req *req)
255	{	194	{
256	--grp->length;	195	eio_submit (req);
257		196
258	/* call feeder, if applicable */	197	if (expect_false (on_next_submit))
259	aio_grp_feed (grp);
260
261	/* finish, if done */
262	if (!grp->length && grp->fd)
263	{	198	{
264	req_invoke (grp);	199	dSP;
265	req_free (grp);	200	SV *cb = sv_2mortal (on_next_submit);
		201
		202	on_next_submit = 0;
		203
		204	PUSHMARK (SP);
		205	PUTBACK;
		206	call_sv (cb, G_DISCARD | G_EVAL);
266	}	207	}
267	}	208	}
268		209
269	static void poll_wait ()	210	static int req_invoke (eio_req *req)
270	{	211	{
271	fd_set rfd;	212	dSP;
272		213
273	while (nreqs)	214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
		216
		217	if (!EIO_CANCELLED (req) && req->callback)
274	{	218	{
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;	219	ENTER;
303	SAVETMPS;	220	SAVETMPS;
304	PUSHMARK (SP);	221	PUSHMARK (SP);
305	EXTEND (SP, 1);	222	EXTEND (SP, 1);
306		223
307	switch (req->type)	224	switch (req->type)
308	{	225	{
309	case REQ_READDIR:	226	case EIO_READDIR:
310	{	227	{
311	SV *rv = &PL_sv_undef;	228	SV *rv = &PL_sv_undef;
312		229
313	if (req->result >= 0)	230	if (req->result >= 0)
314	{	231	{
		232	int i;
315	char *buf = req->data2ptr;	233	char *buf = req->ptr2;
316	AV *av = newAV ();	234	AV *av = newAV ();
317		235
318	while (req->result)	236	av_extend (av, req->result - 1);
		237
		238	for (i = 0; i < req->result; ++i)
319	{	239	{
320	SV *sv = newSVpv (buf, 0);	240	SV *sv = newSVpv (buf, 0);
321		241
322	av_push (av, sv);	242	av_store (av, i, sv);
323	buf += SvCUR (sv) + 1;	243	buf += SvCUR (sv) + 1;
324	req->result--;
325	}	244	}
326		245
327	rv = sv_2mortal (newRV_noinc ((SV *)av));	246	rv = sv_2mortal (newRV_noinc ((SV *)av));
328	}	247	}
329		248
330	PUSHs (rv);	249	PUSHs (rv);
331	}	250	}
332	break;	251	break;
333		252
334	case REQ_OPEN:	253	case EIO_OPEN:
335	{	254	{
336	/* convert fd to fh */	255	/* convert fd to fh */
337	SV *fh;	256	SV *fh = &PL_sv_undef;
338		257
339	PUSHs (sv_2mortal (newSViv (req->result)));	258	if (req->result >= 0)
340	PUTBACK;	259	{
341	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	260	GV *gv = (GV *)sv_newmortal ();
342	SPAGAIN;	261	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		262	char sym [64];
		263	int symlen;
		264
		265	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		266	gv_init (gv, stash, sym, symlen, 0);
343		267
344	fh = SvREFCNT_inc (POPs);	268	symlen = snprintf (
		269	sym,
		270	sizeof (sym),
		271	"%s&=%d",
		272	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		273	req->result
		274	);
345		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
346	PUSHMARK (SP);	280	PUSHs (fh);
347	XPUSHs (sv_2mortal (fh));
348	}	281	}
349	break;	282	break;
350		283
351	case REQ_GROUP:	284	case EIO_GROUP:
352	req->fd = 2; /* mark group as finished */	285	req->int1 = 2; /* mark group as finished */
353		286
354	if (req->data)	287	if (req->sv1)
355	{	288	{
356	int i;	289	int i;
357	AV *av = (AV *)req->data;	290	AV *av = (AV *)req->sv1;
358		291
359	EXTEND (SP, AvFILL (av) + 1);	292	EXTEND (SP, AvFILL (av) + 1);
360	for (i = 0; i <= AvFILL (av); ++i)	293	for (i = 0; i <= AvFILL (av); ++i)
361	PUSHs (*av_fetch (av, i, 0));	294	PUSHs (*av_fetch (av, i, 0));
362	}	295	}
363	break;	296	break;
364		297
365	case REQ_NOP:	298	case EIO_NOP:
366	case REQ_SLEEP:	299	case EIO_BUSY:
367	break;	300	break;
		301
		302	case EIO_READLINK:
		303	if (req->result > 0)
		304	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		305	break;
		306
		307	case EIO_STAT:
		308	case EIO_LSTAT:
		309	case EIO_FSTAT:
		310	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		311	PL_laststatval = req->result;
		312	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		313	PUSHs (sv_2mortal (newSViv (req->result)));
		314	break;
		315
		316	case EIO_READ:
		317	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		318	*SvEND (req->sv2) = 0;
		319	PUSHs (sv_2mortal (newSViv (req->result)));
		320	break;
		321
		322	case EIO_DUP2:
		323	if (req->result > 0)
		324	req->result = 0;
		325	/* FALLTHROUGH */
368		326
369	default:	327	default:
370	PUSHs (sv_2mortal (newSViv (req->result)));	328	PUSHs (sv_2mortal (newSViv (req->result)));
371	break;	329	break;
372	}	330	}
373		331
		332	errno = req->errorno;
374		333
375	PUTBACK;	334	PUTBACK;
376	call_sv (req->callback, G_VOID | G_EVAL);	335	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
377	SPAGAIN;	336	SPAGAIN;
378		337
379	FREETMPS;	338	FREETMPS;
380	LEAVE;	339	LEAVE;
		340
		341	PUTBACK;
381	}	342	}
382		343
383	if (req->grp)	344	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	}	345	}
403		346
404	static void req_free (aio_req req)	347	static void req_destroy (aio_req req)
405	{	348	{
406	if (req->self)	349	if (req->self)
407	{	350	{
408	sv_unmagic (req->self, PERL_MAGIC_ext);	351	sv_unmagic (req->self, PERL_MAGIC_ext);
409	SvREFCNT_dec (req->self);	352	SvREFCNT_dec (req->self);
410	}	353	}
411		354
412	SvREFCNT_dec (req->data);
413	SvREFCNT_dec (req->fh);	355	SvREFCNT_dec (req->sv1);
414	SvREFCNT_dec (req->fh2);	356	SvREFCNT_dec (req->sv2);
415	SvREFCNT_dec (req->callback);	357	SvREFCNT_dec (req->callback);
416	Safefree (req->statdata);
417
418	if (req->type == REQ_READDIR && req->result >= 0)
419	free (req->data2ptr);
420		358
421	Safefree (req);	359	Safefree (req);
422	}	360	}
423		361
424	static void req_cancel (aio_req req)	362	static void req_cancel_subs (aio_req grp)
425	{	363	{
426	req->flags |= FLAG_CANCELLED;	364	aio_req sub;
427		365
428	if (req->type == REQ_GROUP)	366	if (grp->type != EIO_GROUP)
		367	return;
		368
		369	SvREFCNT_dec (grp->sv2);
		370	grp->sv2 = 0;
		371
		372	eio_grp_cancel (grp);
		373	}
		374
		375	#ifdef USE_SOCKETS_AS_HANDLES
		376	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		377	#else
		378	# define TO_SOCKET(x) (x)
		379	#endif
		380
		381	static void
		382	create_respipe (void)
		383	{
		384	int old_readfd = respipe [0];
		385
		386	if (respipe [1] >= 0)
		387	respipe_close (TO_SOCKET (respipe [1]));
		388
		389	#ifdef _WIN32
		390	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		391	#else
		392	if (pipe (respipe))
		393	#endif
		394	croak ("unable to initialize result pipe");
		395
		396	if (old_readfd >= 0)
429	{	397	{
430	aio_req sub;	398	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		399	croak ("unable to initialize result pipe(2)");
431		400
432	for (sub = req->grp_first; sub; sub = sub->grp_next)	401	respipe_close (respipe [0]);
433	req_cancel (sub);	402	respipe [0] = old_readfd;
434	}	403	}
435	}
436		404
		405	#ifdef _WIN32
		406	int arg = 1;
		407	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		408	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		409	#else
		410	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		411	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		412	#endif
		413	croak ("unable to initialize result pipe(3)");
		414
		415	respipe_osf [0] = TO_SOCKET (respipe [0]);
		416	respipe_osf [1] = TO_SOCKET (respipe [1]);
		417	}
		418
		419	static void poll_wait (void)
		420	{
		421	fd_set rfd;
		422
		423	while (eio_nreqs ())
		424	{
		425	int size;
		426
		427	X_LOCK (reslock);
		428	size = res_queue.size;
		429	X_UNLOCK (reslock);
		430
		431	if (size)
		432	return;
		433
		434	etp_maybe_start_thread ();
		435
		436	FD_ZERO (&rfd);
		437	FD_SET (respipe [0], &rfd);
		438
		439	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		440	}
		441	}
		442
437	static int poll_cb ()	443	static int poll_cb (void)
438	{	444	{
439	dSP;
440	int count = 0;
441	int do_croak = 0;
442	aio_req req;
443
444	for (;;)	445	for (;;)
445	{	446	{
446	pthread_mutex_lock (&reslock);	447	int res = eio_poll ();
447	req = reqq_shift (&res_queue);
448		448
449	if (req)	449	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;	450	croak (0);
464		451
465	--nreqs;	452	if (!max_outstanding || max_outstanding > eio_nreqs ())
		453	return res;
466		454
467	if (req->type == REQ_QUIT)	455	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	}	456	}
496
497	return count;
498	}	457	}
499		458
500	static void *aio_proc(void *arg);
501
502	static void start_thread (void)	459	static void atfork_child (void)
503	{	460	{
504	sigset_t fullsigset, oldsigset;	461	create_respipe ();
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	}	462	}
520		463
521	static void req_send (aio_req req)	464	static SV *
		465	get_cb (SV *cb_sv)
522	{	466	{
523	while (started < wanted && nreqs >= started)	467	HV *st;
524	start_thread ();	468	GV *gvp;
		469	CV *cv;
525		470
526	++nreqs;	471	if (!SvOK (cb_sv))
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;	472	return 0;
703		473
704	#if HAVE_SENDFILE	474	cv = sv_2cv (cb_sv, &st, &gvp, 0);
705	# if __linux
706	res = sendfile (ofd, ifd, &offset, count);
707		475
708	# elif __freebsd	476	if (!cv)
709	/*	477	croak ("IO::AIO callback must be undef or a CODE reference");
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		478
717	if (res < 0 && sbytes)	479	return (SV *)cv;
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_SLEEP:
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	}
970
971	static void atfork_child (void)
972	{
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 ();
986
987	atfork_parent ();
988	}	480	}
989		481
990	#define dREQ \	482	#define dREQ \
		483	SV *cb_cv; \
991	aio_req req; \	484	aio_req req; \
992	int req_pri = next_pri; \	485	int req_pri = next_pri; \
993	next_pri = DEFAULT_PRI + PRI_BIAS; \	486	next_pri = EIO_PRI_DEFAULT; \
994	\	487	\
995	if (SvOK (callback) && !SvROK (callback)) \	488	cb_cv = get_cb (callback); \
996	croak ("callback must be undef or of reference type"); \
997	\	489	\
998	Newz (0, req, 1, aio_cb); \	490	Newz (0, req, 1, eio_req); \
999	if (!req) \	491	if (!req) \
1000	croak ("out of memory during aio_req allocation"); \	492	croak ("out of memory during eio_req allocation"); \
1001	\	493	\
1002	req->callback = newSVsv (callback); \	494	req->callback = SvREFCNT_inc (cb_cv); \
1003	req->pri = req_pri	495	req->pri = req_pri
1004		496
1005	#define REQ_SEND \	497	#define REQ_SEND \
		498	PUTBACK; \
1006	req_send (req); \	499	req_submit (req); \
		500	SPAGAIN; \
1007	\	501	\
1008	if (GIMME_V != G_VOID) \	502	if (GIMME_V != G_VOID) \
1009	XPUSHs (req_sv (req, AIO_REQ_KLASS));	503	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1010		504
1011	MODULE = IO::AIO PACKAGE = IO::AIO	505	MODULE = IO::AIO PACKAGE = IO::AIO
1012		506
1013	PROTOTYPES: ENABLE	507	PROTOTYPES: ENABLE
1014		508
1015	BOOT:	509	BOOT:
1016	{	510	{
1017	HV *stash = gv_stashpv ("IO::AIO", 1);	511	stash = gv_stashpv ("IO::AIO", 1);
		512
1018	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	513	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1019	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	514	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1020	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	515	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		516	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		517	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		518	#ifndef _WIN32
		519	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		520	#endif
		521	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		522	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		523	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		524	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
1021		525
1022	create_pipe ();	526	create_respipe ();
1023	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1024	}
1025		527
		528	if (eio_init (want_poll, done_poll) < 0)
		529	croak ("IO::AIO: unable to initialise eio library");
		530
		531	/* atfork child called in fifo order, so before eio's handler */
		532	X_THREAD_ATFORK (0, 0, atfork_child);
		533	}
		534
1026	void	535	void
1027	min_parallel (nthreads)	536	max_poll_reqs (int nreqs)
1028	int nthreads
1029	PROTOTYPE: $	537	PROTOTYPE: $
		538	CODE:
		539	eio_set_max_poll_reqs (nreqs);
1030		540
1031	void	541	void
1032	max_parallel (nthreads)	542	max_poll_time (double nseconds)
1033	int nthreads
1034	PROTOTYPE: $	543	PROTOTYPE: $
1035
1036	int
1037	max_outstanding (nreqs)
1038	int nreqs
1039	PROTOTYPE: $
1040	CODE:	544	CODE:
1041	RETVAL = max_outstanding;	545	eio_set_max_poll_time (nseconds);
		546
		547	void
		548	min_parallel (int nthreads)
		549	PROTOTYPE: $
		550	CODE:
		551	eio_set_min_parallel (nthreads);
		552
		553	void
		554	max_parallel (int nthreads)
		555	PROTOTYPE: $
		556	CODE:
		557	eio_set_max_parallel (nthreads);
		558
		559	void
		560	max_idle (int nthreads)
		561	PROTOTYPE: $
		562	CODE:
		563	eio_set_max_idle (nthreads);
		564
		565	void
		566	max_outstanding (int maxreqs)
		567	PROTOTYPE: $
		568	CODE:
1042	max_outstanding = nreqs;	569	max_outstanding = maxreqs;
1043		570
1044	void	571	void
1045	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	572	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: $$$;$	573	PROTOTYPE: $$$;$
1051	PPCODE:	574	PPCODE:
1052	{	575	{
1053	dREQ;	576	dREQ;
1054		577
1055	req->type = REQ_OPEN;	578	req->type = EIO_OPEN;
1056	req->data = newSVsv (pathname);	579	req->sv1 = newSVsv (pathname);
1057	req->dataptr = SvPVbyte_nolen (req->data);	580	req->ptr1 = SvPVbyte_nolen (req->sv1);
1058	req->fd = flags;	581	req->int1 = flags;
1059	req->mode = mode;	582	req->int2 = mode;
1060		583
1061	REQ_SEND;	584	REQ_SEND;
1062	}	585	}
1063		586
1064	void	587	void
1065	aio_close (fh,callback=&PL_sv_undef)	588	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1066	SV * fh
1067	SV * callback
1068	PROTOTYPE: $;$	589	PROTOTYPE: $;$
1069	ALIAS:	590	ALIAS:
1070	aio_close = REQ_CLOSE
1071	aio_fsync = REQ_FSYNC	591	aio_fsync = EIO_FSYNC
1072	aio_fdatasync = REQ_FDATASYNC	592	aio_fdatasync = EIO_FDATASYNC
1073	PPCODE:	593	PPCODE:
1074	{	594	{
1075	dREQ;	595	dREQ;
1076		596
1077	req->type = ix;	597	req->type = ix;
1078	req->fh = newSVsv (fh);	598	req->sv1 = newSVsv (fh);
1079	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	599	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1080		600
1081	REQ_SEND (req);	601	REQ_SEND (req);
1082	}	602	}
1083		603
1084	void	604	void
		605	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		606	PROTOTYPE: $$$$;$
		607	PPCODE:
		608	{
		609	dREQ;
		610
		611	req->type = EIO_SYNC_FILE_RANGE;
		612	req->sv1 = newSVsv (fh);
		613	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		614	req->offs = SvVAL64 (offset);
		615	req->size = SvVAL64 (nbytes);
		616	req->int2 = flags;
		617
		618	REQ_SEND (req);
		619	}
		620
		621	void
		622	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		623	PROTOTYPE: $;$
		624	PPCODE:
		625	{
		626	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		627	dREQ;
		628
		629	if (close_pipe < 0)
		630	{
		631	int pipefd [2];
		632
		633	if (pipe (pipefd) < 0
		634	|| close (pipefd [1]) < 0
		635	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		636	abort (); /*D*/
		637
		638	close_pipe = pipefd [0];
		639	}
		640
		641	req->type = EIO_DUP2;
		642	req->int1 = close_pipe;
		643	req->sv2 = newSVsv (fh);
		644	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		645
		646	REQ_SEND (req);
		647	}
		648
		649	void
1085	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	650	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1086	SV * fh
1087	UV offset
1088	UV length
1089	SV * data
1090	UV dataoffset
1091	SV * callback
1092	ALIAS:	651	ALIAS:
1093	aio_read = REQ_READ	652	aio_read = EIO_READ
1094	aio_write = REQ_WRITE	653	aio_write = EIO_WRITE
1095	PROTOTYPE: $$$$$;$	654	PROTOTYPE: $$$$$;$
1096	PPCODE:	655	PPCODE:
1097	{	656	{
1098	aio_req req;
1099	STRLEN svlen;	657	STRLEN svlen;
1100	char *svptr = SvPVbyte (data, svlen);	658	char *svptr = SvPVbyte (data, svlen);
		659	UV len = SvUV (length);
		660	int fd;
		661
		662	if (SvTYPE (data) > SVt_PVMG)
		663	croak ("illegal data argument '%s', must be plain scalar string", SvPV_nolen (data));
1101		664
1102	SvUPGRADE (data, SVt_PV);	665	SvUPGRADE (data, SVt_PV);
1103	SvPOK_on (data);	666	SvPOK_only (data);
1104		667
1105	if (dataoffset < 0)	668	if (dataoffset < 0)
1106	dataoffset += svlen;	669	dataoffset += svlen;
1107		670
1108	if (dataoffset < 0 || dataoffset > svlen)	671	if (dataoffset < 0 || dataoffset > svlen)
1109	croak ("data offset outside of string");	672	croak ("dataoffset outside of data scalar");
1110		673
1111	if (ix == REQ_WRITE)	674	if (ix == EIO_WRITE)
1112	{	675	{
1113	/* write: check length and adjust. */	676	/* write: check length and adjust. */
1114	if (length < 0 || length + dataoffset > svlen)	677	if (!SvOK (length) || len + dataoffset > svlen)
1115	length = svlen - dataoffset;	678	len = svlen - dataoffset;
1116	}	679	}
1117	else	680	else
1118	{	681	{
1119	/* read: grow scalar as necessary */	682	/* read: grow scalar as necessary */
1120	svptr = SvGROW (data, length + dataoffset);	683	svptr = SvGROW (data, len + dataoffset + 1);
1121	}	684	}
1122		685
1123	if (length < 0)	686	if (len < 0)
1124	croak ("length must not be negative");	687	croak ("length must not be negative");
		688
		689	fd = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
		690	: IoOFP (sv_2io (fh)));
		691
		692	if (fd < 0)
		693	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
1125		694
1126	{	695	{
1127	dREQ;	696	dREQ;
1128		697
1129	req->type = ix;	698	req->type = ix;
1130	req->fh = newSVsv (fh);	699	req->sv1 = newSVsv (fh);
1131	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	700	req->int1 = df;
1132	: IoOFP (sv_2io (fh)));	701	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1133	req->offset = offset;	702	req->size = len;
1134	req->length = length;
1135	req->data = SvREFCNT_inc (data);	703	req->sv2 = SvREFCNT_inc (data);
1136	req->dataptr = (char *)svptr + dataoffset;	704	req->ptr2 = (char *)svptr + dataoffset;
		705	req->stroffset = dataoffset;
1137		706
1138	if (!SvREADONLY (data))	707	if (!SvREADONLY (data))
1139	{	708	{
1140	SvREADONLY_on (data);	709	SvREADONLY_on (data);
1141	req->data2ptr = (void *)data;	710	req->flags |= FLAG_SV2_RO_OFF;
1142	}	711	}
1143		712
1144	REQ_SEND;	713	REQ_SEND;
1145	}	714	}
1146	}	715	}
1147		716
1148	void	717	void
		718	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		719	PROTOTYPE: $$;$
		720	PPCODE:
		721	{
		722	SV *data;
		723	dREQ;
		724
		725	req->type = EIO_READLINK;
		726	req->sv1 = newSVsv (path);
		727	req->ptr1 = SvPVbyte_nolen (req->sv1);
		728
		729	REQ_SEND;
		730	}
		731
		732	void
1149	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	733	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: $$$$;$	734	PROTOTYPE: $$$$;$
1156	PPCODE:	735	PPCODE:
1157	{	736	{
1158	dREQ;	737	dREQ;
1159		738
1160	req->type = REQ_SENDFILE;	739	req->type = EIO_SENDFILE;
1161	req->fh = newSVsv (out_fh);	740	req->sv1 = newSVsv (out_fh);
1162	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	741	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1163	req->fh2 = newSVsv (in_fh);	742	req->sv2 = newSVsv (in_fh);
1164	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	743	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1165	req->offset = in_offset;	744	req->offs = SvVAL64 (in_offset);
1166	req->length = length;	745	req->size = length;
1167		746
1168	REQ_SEND;	747	REQ_SEND;
1169	}	748	}
1170		749
1171	void	750	void
1172	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	751	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1173	SV * fh
1174	UV offset
1175	IV length
1176	SV * callback
1177	PROTOTYPE: $$$;$	752	PROTOTYPE: $$$;$
1178	PPCODE:	753	PPCODE:
1179	{	754	{
1180	dREQ;	755	dREQ;
1181		756
1182	req->type = REQ_READAHEAD;	757	req->type = EIO_READAHEAD;
1183	req->fh = newSVsv (fh);	758	req->sv1 = newSVsv (fh);
1184	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	759	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1185	req->offset = offset;	760	req->offs = SvVAL64 (offset);
1186	req->length = length;	761	req->size = length;
1187		762
1188	REQ_SEND;	763	REQ_SEND;
1189	}	764	}
1190		765
1191	void	766	void
1192	aio_stat (fh_or_path,callback=&PL_sv_undef)	767	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1193	SV * fh_or_path
1194	SV * callback
1195	ALIAS:	768	ALIAS:
1196	aio_stat = REQ_STAT	769	aio_stat = EIO_STAT
1197	aio_lstat = REQ_LSTAT	770	aio_lstat = EIO_LSTAT
1198	PPCODE:	771	PPCODE:
1199	{	772	{
1200	dREQ;	773	dREQ;
1201		774
1202	New (0, req->statdata, 1, Stat_t);	775	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		776
1209	if (SvPOK (fh_or_path))	777	if (SvPOK (req->sv1))
1210	{	778	{
1211	req->type = ix;	779	req->type = ix;
1212	req->data = newSVsv (fh_or_path);
1213	req->dataptr = SvPVbyte_nolen (req->data);	780	req->ptr1 = SvPVbyte_nolen (req->sv1);
1214	}	781	}
1215	else	782	else
1216	{	783	{
1217	req->type = REQ_FSTAT;	784	req->type = EIO_FSTAT;
1218	req->fh = newSVsv (fh_or_path);
1219	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	785	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1220	}	786	}
1221		787
1222	REQ_SEND;	788	REQ_SEND;
1223	}	789	}
1224		790
1225	void	791	void
		792	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		793	PPCODE:
		794	{
		795	dREQ;
		796
		797	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		798	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		799	req->sv1 = newSVsv (fh_or_path);
		800
		801	if (SvPOK (req->sv1))
		802	{
		803	req->type = EIO_UTIME;
		804	req->ptr1 = SvPVbyte_nolen (req->sv1);
		805	}
		806	else
		807	{
		808	req->type = EIO_FUTIME;
		809	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		810	}
		811
		812	REQ_SEND;
		813	}
		814
		815	void
		816	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		817	PPCODE:
		818	{
		819	dREQ;
		820
		821	req->sv1 = newSVsv (fh_or_path);
		822	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		823
		824	if (SvPOK (req->sv1))
		825	{
		826	req->type = EIO_TRUNCATE;
		827	req->ptr1 = SvPVbyte_nolen (req->sv1);
		828	}
		829	else
		830	{
		831	req->type = EIO_FTRUNCATE;
		832	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		833	}
		834
		835	REQ_SEND;
		836	}
		837
		838	void
		839	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		840	ALIAS:
		841	aio_chmod = EIO_CHMOD
		842	aio_mkdir = EIO_MKDIR
		843	PPCODE:
		844	{
		845	dREQ;
		846
		847	req->int2 = mode;
		848	req->sv1 = newSVsv (fh_or_path);
		849
		850	if (SvPOK (req->sv1))
		851	{
		852	req->type = ix;
		853	req->ptr1 = SvPVbyte_nolen (req->sv1);
		854	}
		855	else
		856	{
		857	req->type = EIO_FCHMOD;
		858	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		859	}
		860
		861	REQ_SEND;
		862	}
		863
		864	void
		865	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		866	PPCODE:
		867	{
		868	dREQ;
		869
		870	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		871	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		872	req->sv1 = newSVsv (fh_or_path);
		873
		874	if (SvPOK (req->sv1))
		875	{
		876	req->type = EIO_CHOWN;
		877	req->ptr1 = SvPVbyte_nolen (req->sv1);
		878	}
		879	else
		880	{
		881	req->type = EIO_FCHOWN;
		882	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		883	}
		884
		885	REQ_SEND;
		886	}
		887
		888	void
1226	aio_unlink (pathname,callback=&PL_sv_undef)	889	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1227	SV * pathname
1228	SV * callback
1229	ALIAS:	890	ALIAS:
1230	aio_unlink = REQ_UNLINK	891	aio_unlink = EIO_UNLINK
1231	aio_rmdir = REQ_RMDIR	892	aio_rmdir = EIO_RMDIR
1232	aio_readdir = REQ_READDIR	893	aio_readdir = EIO_READDIR
1233	PPCODE:	894	PPCODE:
1234	{	895	{
1235	dREQ;	896	dREQ;
1236		897
1237	req->type = ix;	898	req->type = ix;
1238	req->data = newSVsv (pathname);	899	req->sv1 = newSVsv (pathname);
1239	req->dataptr = SvPVbyte_nolen (req->data);	900	req->ptr1 = SvPVbyte_nolen (req->sv1);
		901
		902	REQ_SEND;
		903	}
		904
		905	void
		906	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		907	ALIAS:
		908	aio_link = EIO_LINK
		909	aio_symlink = EIO_SYMLINK
		910	aio_rename = EIO_RENAME
		911	PPCODE:
		912	{
		913	dREQ;
		914
		915	req->type = ix;
		916	req->sv1 = newSVsv (oldpath);
		917	req->ptr1 = SvPVbyte_nolen (req->sv1);
		918	req->sv2 = newSVsv (newpath);
		919	req->ptr2 = SvPVbyte_nolen (req->sv2);
1240		920
1241	REQ_SEND;	921	REQ_SEND;
1242	}	922	}
1243		923
1244	void	924	void
1245	aio_link (oldpath,newpath,callback=&PL_sv_undef)	925	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:	926	PPCODE:
1254	{	927	{
1255	dREQ;	928	dREQ;
1256		929
1257	req->type = ix;	930	req->type = EIO_MKNOD;
1258	req->fh = newSVsv (oldpath);	931	req->sv1 = newSVsv (pathname);
1259	req->data2ptr = SvPVbyte_nolen (req->fh);	932	req->ptr1 = SvPVbyte_nolen (req->sv1);
1260	req->data = newSVsv (newpath);	933	req->int2 = (mode_t)mode;
1261	req->dataptr = SvPVbyte_nolen (req->data);	934	req->offs = dev;
1262		935
1263	REQ_SEND;	936	REQ_SEND;
1264	}	937	}
1265		938
1266	void	939	void
1267	aio_sleep (delay,callback=&PL_sv_undef)	940	aio_busy (double delay, SV *callback=&PL_sv_undef)
1268	double delay
1269	SV * callback
1270	PPCODE:	941	PPCODE:
1271	{	942	{
1272	dREQ;	943	dREQ;
1273		944
1274	req->type = REQ_SLEEP;	945	req->type = EIO_BUSY;
1275	req->fd = delay < 0. ? 0 : delay;	946	req->nv1 = delay < 0. ? 0. : delay;
1276	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1277		947
1278	REQ_SEND;	948	REQ_SEND;
1279	}	949	}
1280		950
1281	void	951	void
1282	aio_group (callback=&PL_sv_undef)	952	aio_group (SV *callback=&PL_sv_undef)
1283	SV * callback
1284	PROTOTYPE: ;$	953	PROTOTYPE: ;$
1285	PPCODE:	954	PPCODE:
1286	{	955	{
1287	dREQ;	956	dREQ;
1288		957
1289	req->type = REQ_GROUP;	958	req->type = EIO_GROUP;
		959
1290	req_send (req);	960	req_submit (req);
1291
1292	XPUSHs (req_sv (req, AIO_GRP_KLASS));	961	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1293	}	962	}
1294		963
1295	void	964	void
1296	aio_nop (callback=&PL_sv_undef)	965	aio_nop (SV *callback=&PL_sv_undef)
1297	SV * callback	966	ALIAS:
		967	aio_nop = EIO_NOP
		968	aio_sync = EIO_SYNC
1298	PPCODE:	969	PPCODE:
1299	{	970	{
1300	dREQ;	971	dREQ;
1301		972
1302	req->type = REQ_NOP;	973	req->type = ix;
1303		974
1304	REQ_SEND;	975	REQ_SEND;
1305	}	976	}
1306		977
1307	void	978	int
1308	aioreq_pri (int pri = DEFAULT_PRI)	979	aioreq_pri (int pri = 0)
		980	PROTOTYPE: ;$
1309	CODE:	981	CODE:
		982	RETVAL = next_pri;
		983	if (items > 0)
		984	{
1310	if (pri < PRI_MIN) pri = PRI_MIN;	985	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1311	if (pri > PRI_MAX) pri = PRI_MAX;	986	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1312	next_pri = pri + PRI_BIAS;	987	next_pri = pri;
		988	}
		989	OUTPUT:
		990	RETVAL
		991
		992	void
		993	aioreq_nice (int nice = 0)
		994	CODE:
		995	nice = next_pri - nice;
		996	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		997	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		998	next_pri = nice;
1313		999
1314	void	1000	void
1315	flush ()	1001	flush ()
1316	PROTOTYPE:	1002	PROTOTYPE:
1317	CODE:	1003	CODE:
1318	while (nreqs)	1004	while (eio_nreqs ())
1319	{	1005	{
1320	poll_wait ();	1006	poll_wait ();
1321	poll_cb ();	1007	poll_cb ();
1322	}	1008	}
1323		1009
1324	void	1010	int
1325	poll()	1011	poll()
1326	PROTOTYPE:	1012	PROTOTYPE:
1327	CODE:	1013	CODE:
1328	if (nreqs)
1329	{
1330	poll_wait ();	1014	poll_wait ();
1331	poll_cb ();	1015	RETVAL = poll_cb ();
1332	}	1016	OUTPUT:
		1017	RETVAL
1333		1018
1334	int	1019	int
1335	poll_fileno()	1020	poll_fileno()
1336	PROTOTYPE:	1021	PROTOTYPE:
1337	CODE:	1022	CODE:
…		…
1349		1034
1350	void	1035	void
1351	poll_wait()	1036	poll_wait()
1352	PROTOTYPE:	1037	PROTOTYPE:
1353	CODE:	1038	CODE:
1354	if (nreqs)
1355	poll_wait ();	1039	poll_wait ();
1356		1040
1357	int	1041	int
1358	nreqs()	1042	nreqs()
1359	PROTOTYPE:	1043	PROTOTYPE:
1360	CODE:	1044	CODE:
1361	RETVAL = nreqs;	1045	RETVAL = eio_nreqs ();
1362	OUTPUT:	1046	OUTPUT:
1363	RETVAL	1047	RETVAL
1364		1048
		1049	int
		1050	nready()
		1051	PROTOTYPE:
		1052	CODE:
		1053	RETVAL = eio_nready ();
		1054	OUTPUT:
		1055	RETVAL
		1056
		1057	int
		1058	npending()
		1059	PROTOTYPE:
		1060	CODE:
		1061	RETVAL = eio_npending ();
		1062	OUTPUT:
		1063	RETVAL
		1064
		1065	int
		1066	nthreads()
		1067	PROTOTYPE:
		1068	CODE:
		1069	RETVAL = eio_nthreads ();
		1070	OUTPUT:
		1071	RETVAL
		1072
		1073	void _on_next_submit (SV *cb)
		1074	CODE:
		1075	SvREFCNT_dec (on_next_submit);
		1076	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1077
1365	PROTOTYPES: DISABLE	1078	PROTOTYPES: DISABLE
1366		1079
1367	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1080	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1368		1081
1369	void	1082	void
1370	cancel (aio_req_ornot req)	1083	cancel (aio_req_ornot req)
1371	CODE:	1084	CODE:
1372	req_cancel (req);	1085	eio_cancel (req);
1373		1086
1374	void	1087	void
1375	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1088	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1376	CODE:	1089	PPCODE:
		1090	{
		1091	if (GIMME_V != G_VOID)
		1092	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1093
		1094	if (items > 1)
		1095	{
		1096	SV *cb_cv = get_cb (callback);
		1097
1377	SvREFCNT_dec (req->callback);	1098	SvREFCNT_dec (req->callback);
1378	req->callback = newSVsv (callback);	1099	req->callback = SvREFCNT_inc (cb_cv);
		1100	}
		1101	}
1379		1102
1380	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1103	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1381		1104
1382	void	1105	void
1383	add (aio_req grp, ...)	1106	add (aio_req grp, ...)
1384	PPCODE:	1107	PPCODE:
1385	{	1108	{
1386	int i;	1109	int i;
1387	aio_req req;
1388		1110
1389	if (grp->fd == 2)	1111	if (grp->int1 == 2)
1390	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1112	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1391		1113
1392	for (i = 1; i < items; ++i )	1114	for (i = 1; i < items; ++i )
1393	{	1115	{
		1116	aio_req req;
		1117
1394	if (GIMME_V != G_VOID)	1118	if (GIMME_V != G_VOID)
1395	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1119	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1396		1120
1397	req = SvAIO_REQ (ST (i));	1121	req = SvAIO_REQ (ST (i));
1398		1122
1399	if (req)	1123	if (req)
1400	{	1124	eio_grp_add (grp, req);
1401	++grp->length;
1402	req->grp = grp;
1403
1404	req->grp_prev = 0;
1405	req->grp_next = grp->grp_first;
1406
1407	if (grp->grp_first)
1408	grp->grp_first->grp_prev = req;
1409
1410	grp->grp_first = req;
1411	}	1125	}
1412	}
1413	}	1126	}
		1127
		1128	void
		1129	cancel_subs (aio_req_ornot req)
		1130	CODE:
		1131	req_cancel_subs (req);
1414		1132
1415	void	1133	void
1416	result (aio_req grp, ...)	1134	result (aio_req grp, ...)
1417	CODE:	1135	CODE:
1418	{	1136	{
1419	int i;	1137	int i;
		1138	AV *av;
		1139
		1140	grp->errorno = errno;
		1141
1420	AV *av = newAV ();	1142	av = newAV ();
1421		1143
1422	for (i = 1; i < items; ++i )	1144	for (i = 1; i < items; ++i )
1423	av_push (av, newSVsv (ST (i)));	1145	av_push (av, newSVsv (ST (i)));
1424		1146
1425	SvREFCNT_dec (grp->data);	1147	SvREFCNT_dec (grp->sv1);
1426	grp->data = (SV *)av;	1148	grp->sv1 = (SV *)av;
1427	}	1149	}
		1150
		1151	void
		1152	errno (aio_req grp, int errorno = errno)
		1153	CODE:
		1154	grp->errorno = errorno;
1428		1155
1429	void	1156	void
1430	limit (aio_req grp, int limit)	1157	limit (aio_req grp, int limit)
1431	CODE:	1158	CODE:
1432	grp->fd2 = limit;	1159	eio_grp_limit (grp, limit);
1433	aio_grp_feed (grp);
1434		1160
1435	void	1161	void
1436	feed (aio_req grp, SV *callback=&PL_sv_undef)	1162	feed (aio_req grp, SV *callback=&PL_sv_undef)
1437	CODE:	1163	CODE:
1438	{	1164	{
1439	SvREFCNT_dec (grp->fh2);	1165	SvREFCNT_dec (grp->sv2);
1440	grp->fh2 = newSVsv (callback);	1166	grp->sv2 = newSVsv (callback);
		1167	grp->feed = aio_grp_feed;
1441		1168
1442	if (grp->fd2 <= 0)	1169	if (grp->int2 <= 0)
1443	grp->fd2 = 2;	1170	grp->int2 = 2;
1444		1171
1445	aio_grp_feed (grp);	1172	eio_grp_limit (grp, grp->int2);
1446	}	1173	}
1447		1174

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