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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.76 by root, Thu Oct 26 12:38:04 2006 UTC vs.
Revision 1.117 by root, Sat May 10 20:02:09 2008 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux && !defined(_GNU_SOURCE)
5	# define _GNU_SOURCE
6	#endif
7
8	/* just in case */
9	#define _REENTRANT 1
10		2
11	#include <errno.h>	3	#include <errno.h>
12		4
13	#include "EXTERN.h"	5	#include "EXTERN.h"
14	#include "perl.h"	6	#include "perl.h"
15	#include "XSUB.h"	7	#include "XSUB.h"
16		8
17	#include "autoconf/config.h"
18
19	#include <pthread.h>
20
21	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
22	#include <errno.h>	11	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	12	#include <sys/types.h>
26	#include <sys/stat.h>	13	#include <sys/stat.h>
27	#include <limits.h>	14	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	15	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	16	#include <sched.h>
32		17
33	#if HAVE_SENDFILE	18	#ifdef _WIN32
34	# if __linux	19
35	# include <sys/sendfile.h>	20	# define EIO_STRUCT_DIRENT Direntry_t
36	# elif __freebsd	21	# undef malloc
37	# include <sys/socket.h>	22	# undef free
38	# include <sys/uio.h>	23
39	# elif __hpux	24	// perl overrides all those nice win32 functions
40	# include <sys/socket.h>	25	# undef open
41	# elif __solaris /* not yet */	26	# undef read
42	# include <sys/sendfile.h>	27	# undef write
		28	# undef send
		29	# undef recv
		30	# undef stat
		31	# undef fstat
		32	# define lstat stat
		33	# undef truncate
		34	# undef ftruncate
		35	# undef open
		36	# undef close
		37	# undef unlink
		38	# undef rmdir
		39	# undef rename
		40	# undef lseek
		41
		42	# define chown(a,b,c) (errno = ENOSYS, -1)
		43	# define fchown(a,b,c) (errno = ENOSYS, -1)
		44	# define fchmod(a,b) (errno = ENOSYS, -1)
		45	# define symlink(a,b) (errno = ENOSYS, -1)
		46	# define readlink(a,b,c) (errno = ENOSYS, -1)
		47	# define mknod(a,b,c) (errno = ENOSYS, -1)
		48	# define truncate(a,b) (errno = ENOSYS, -1)
		49	# define ftruncate(fd,o) chsize ((fd), (o))
		50	# define fsync(fd) _commit (fd)
		51	# define opendir(fd) (errno = ENOSYS, 0)
		52	# define readdir(fd) (errno = ENOSYS, -1)
		53	# define closedir(fd) (errno = ENOSYS, -1)
		54	# define mkdir(a,b) mkdir (a)
		55
43	# else	56	#else
44	# error sendfile support requested but not available	57
45	# endif	58	# include <sys/time.h>
		59	# include <sys/select.h>
		60	# include <unistd.h>
		61	# include <utime.h>
		62	# include <signal.h>
		63	# define EIO_STRUCT_DIRENT struct dirent
		64
46	#endif	65	#endif
47		66
48	/* used for struct dirent, AIX doesn't provide it */	67	#define EIO_STRUCT_STAT Stat_t
49	#ifndef NAME_MAX	68
50	# define NAME_MAX 4096	69	/* use NV for 32 bit perls as it allows larger offsets */
		70	#if IVSIZE >= 8
		71	# define SvVAL64 SvIV
		72	#else
		73	# define SvVAL64 SvNV
51	#endif	74	#endif
52		75
53	#ifndef PTHREAD_STACK_MIN	76	static HV *stash;
54	/* care for broken platforms, e.g. windows */	77	typedef SV SV8; /* byte-sv, used for argument-checking */
55	# define PTHREAD_STACK_MIN 16384
56	#endif
57
58	#if __ia64
59	# define STACKSIZE 65536
60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
61	# define STACKSIZE PTHREAD_STACK_MIN
62	#else
63	# define STACKSIZE 16384
64	#endif
65
66	/* buffer size for various temporary buffers */
67	#define AIO_BUFSIZE 65536
68
69	#define dBUF \
70	char *aio_buf; \
71	LOCK (wrklock); \
72	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
73	UNLOCK (wrklock); \
74	if (!aio_buf) \
75	return -1;
76
77	enum {
78	REQ_QUIT,
79	REQ_OPEN, REQ_CLOSE,
80	REQ_READ, REQ_WRITE, REQ_READAHEAD,
81	REQ_SENDFILE,
82	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
83	REQ_FSYNC, REQ_FDATASYNC,
84	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
85	REQ_READDIR,
86	REQ_LINK, REQ_SYMLINK,
87	REQ_GROUP, REQ_NOP,
88	REQ_BUSY,
89	};
90		78
91	#define AIO_REQ_KLASS "IO::AIO::REQ"	79	#define AIO_REQ_KLASS "IO::AIO::REQ"
92	#define AIO_GRP_KLASS "IO::AIO::GRP"	80	#define AIO_GRP_KLASS "IO::AIO::GRP"
93		81
94	typedef struct aio_cb	82	#define EIO_COMMON \
95	{
96	struct aio_cb *volatile next;
97
98	SV *data, *callback;	83	SV *callback; \
99	SV *fh, *fh2;	84	SV *sv1, *sv2; \
100	void *dataptr, *data2ptr;
101	Stat_t *statdata;
102	off_t offset;
103	size_t length;
104	ssize_t result;
105
106	STRLEN dataoffset;	85	STRLEN stroffset; \
107	int type;	86	SV *self
108	int fd, fd2;
109	int errorno;
110	mode_t mode; /* open */
111		87
112	unsigned char flags;	88	#include "libeio/eio.h"
113	unsigned char pri;
114		89
115	SV *self; /* the perl counterpart of this request, if any */	90	static int req_invoke (eio_req *req);
116	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	91	#define EIO_FINISH(req) req_invoke (req)
117	} aio_cb;	92	static void aio_grp_feed (eio_req *grp);
		93	#define EIO_FEED(req) aio_grp_feed (req)
		94	static void req_destroy (eio_req *grp);
		95	#define EIO_DESTROY(req) req_destroy (req)
118		96
119	enum {	97	enum {
120	FLAG_CANCELLED = 0x01,	98	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
121	};	99	};
122		100
		101	#include "libeio/eio.c"
		102
123	typedef aio_cb *aio_req;	103	typedef eio_req *aio_req;
124	typedef aio_cb *aio_req_ornot;	104	typedef eio_req *aio_req_ornot;
125		105
126	enum {	106	static SV *on_next_submit;
127	PRI_MIN = -4,
128	PRI_MAX = 4,
129
130	DEFAULT_PRI = 0,
131	PRI_BIAS = -PRI_MIN,
132	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
133	};
134
135	static int next_pri = DEFAULT_PRI + PRI_BIAS;	107	static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
		108	static int max_outstanding;
136		109
137	static int started, wanted;	110	static int respipe_osf [2], respipe [2] = { -1, -1 };
138	static volatile int nreqs;
139	static int respipe [2];
140		111
141	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
142	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
143	#else
144	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
145	#endif
146
147	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
148	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
149
150	/* worker threads management */
151	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
152
153	typedef struct worker {
154	/* locked by wrklock */
155	struct worker *prev, *next;
156
157	pthread_t tid;
158
159	/* locked by reslock, reqlock or wrklock */
160	aio_req req; /* currently processed request */
161	void *dbuf;
162	DIR *dirp;
163	} worker;
164
165	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
166
167	static void worker_clear (worker *wrk)
168	{
169	if (wrk->dirp)
170	{
171	closedir (wrk->dirp);
172	wrk->dirp = 0;
173	}
174
175	if (wrk->dbuf)
176	{
177	free (wrk->dbuf);
178	wrk->dbuf = 0;
179	}
180	}
181
182	static void worker_free (worker *wrk)
183	{
184	wrk->next->prev = wrk->prev;
185	wrk->prev->next = wrk->next;
186
187	free (wrk);
188	}
189
190	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
191	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
192	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
193
194	/*
195	* a somewhat faster data structure might be nice, but
196	* with 8 priorities this actually needs <20 insns
197	* per shift, the most expensive operation.
198	*/
199	typedef struct {
200	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
201	int size;
202	} reqq;
203
204	static reqq req_queue;
205	static reqq res_queue;
206
207	int reqq_push (reqq *q, aio_req req)
208	{
209	int pri = req->pri;
210	req->next = 0;
211
212	if (q->qe[pri])
213	{
214	q->qe[pri]->next = req;
215	q->qe[pri] = req;
216	}
217	else
218	q->qe[pri] = q->qs[pri] = req;
219
220	return q->size++;
221	}
222
223	aio_req reqq_shift (reqq *q)
224	{
225	int pri;
226
227	if (!q->size)
228	return 0;
229
230	--q->size;
231
232	for (pri = NUM_PRI; pri--; )
233	{
234	aio_req req = q->qs[pri];
235
236	if (req)
237	{
238	if (!(q->qs[pri] = req->next))
239	q->qe[pri] = 0;
240
241	return req;
242	}
243	}
244
245	abort ();
246	}
247
248	static int poll_cb (int max);
249	static void req_invoke (aio_req req);
250	static void req_free (aio_req req);	112	static void req_destroy (aio_req req);
251	static void req_cancel (aio_req req);	113	static void req_cancel (aio_req req);
		114
		115	static void want_poll (void)
		116	{
		117	/* write a dummy byte to the pipe so fh becomes ready */
		118	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		119	}
		120
		121	static void done_poll (void)
		122	{
		123	/* read any signals sent by the worker threads */
		124	char buf [4];
		125	while (respipe_read (respipe [0], buf, 4) == 4)
		126	;
		127	}
252		128
253	/* must be called at most once */	129	/* must be called at most once */
254	static SV *req_sv (aio_req req, const char *klass)	130	static SV *req_sv (aio_req req, const char *klass)
255	{	131	{
256	if (!req->self)	132	if (!req->self)
…		…
274	return mg ? (aio_req)mg->mg_ptr : 0;	150	return mg ? (aio_req)mg->mg_ptr : 0;
275	}	151	}
276		152
277	static void aio_grp_feed (aio_req grp)	153	static void aio_grp_feed (aio_req grp)
278	{	154	{
279	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	155	if (grp->sv2 && SvOK (grp->sv2))
280	{	156	{
281	int old_len = grp->length;
282
283	if (grp->fh2 && SvOK (grp->fh2))
284	{
285	dSP;	157	dSP;
286		158
287	ENTER;	159	ENTER;
288	SAVETMPS;	160	SAVETMPS;
289	PUSHMARK (SP);	161	PUSHMARK (SP);
290	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	162	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
291	PUTBACK;	163	PUTBACK;
292	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	164	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
293	SPAGAIN;	165	SPAGAIN;
294	FREETMPS;	166	FREETMPS;
295	LEAVE;	167	LEAVE;
296	}
297
298	/* stop if no progress has been made */
299	if (old_len == grp->length)
300	{
301	SvREFCNT_dec (grp->fh2);
302	grp->fh2 = 0;
303	break;
304	}
305	}	168	}
306	}	169	}
307		170
308	static void aio_grp_dec (aio_req grp)	171	static void req_submit (eio_req *req)
309	{	172	{
310	--grp->length;	173	eio_submit (req);
311		174
312	/* call feeder, if applicable */	175	if (on_next_submit)
313	aio_grp_feed (grp);
314
315	/* finish, if done */
316	if (!grp->length && grp->fd)
317	{	176	{
318	req_invoke (grp);	177	dSP;
319	req_free (grp);	178	SV *cb = sv_2mortal (on_next_submit);
		179
		180	on_next_submit = 0;
		181
		182	PUSHMARK (SP);
		183	PUTBACK;
		184	call_sv (cb, G_DISCARD | G_EVAL);
320	}	185	}
321	}	186	}
322		187
323	static void poll_wait ()	188	static int req_invoke (eio_req *req)
324	{	189	{
325	fd_set rfd;	190	dSP;
326		191
327	while (nreqs)	192	if (req->flags & FLAG_SV2_RO_OFF)
		193	SvREADONLY_off (req->sv2);
		194
		195	if (!EIO_CANCELLED (req) && SvOK (req->callback))
328	{	196	{
329	int size;
330	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
331	LOCK (reslock);
332	#endif
333	size = res_queue.size;
334	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
335	UNLOCK (reslock);
336	#endif
337
338	if (size)
339	return;
340
341	FD_ZERO(&rfd);
342	FD_SET(respipe [0], &rfd);
343
344	select (respipe [0] + 1, &rfd, 0, 0, 0);
345	}
346	}
347
348	static void req_invoke (aio_req req)
349	{
350	dSP;
351
352	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
353	{
354	errno = req->errorno;
355
356	ENTER;	197	ENTER;
357	SAVETMPS;	198	SAVETMPS;
358	PUSHMARK (SP);	199	PUSHMARK (SP);
359	EXTEND (SP, 1);	200	EXTEND (SP, 1);
360		201
361	switch (req->type)	202	switch (req->type)
362	{	203	{
363	case REQ_READDIR:	204	case EIO_READDIR:
364	{	205	{
365	SV *rv = &PL_sv_undef;	206	SV *rv = &PL_sv_undef;
366		207
367	if (req->result >= 0)	208	if (req->result >= 0)
368	{	209	{
369	int i;	210	int i;
370	char *buf = req->data2ptr;	211	char *buf = req->ptr2;
371	AV *av = newAV ();	212	AV *av = newAV ();
372		213
373	av_extend (av, req->result - 1);	214	av_extend (av, req->result - 1);
374		215
375	for (i = 0; i < req->result; ++i)	216	for (i = 0; i < req->result; ++i)
…		…
385		226
386	PUSHs (rv);	227	PUSHs (rv);
387	}	228	}
388	break;	229	break;
389		230
390	case REQ_OPEN:	231	case EIO_OPEN:
391	{	232	{
392	/* convert fd to fh */	233	/* convert fd to fh */
393	SV *fh;	234	SV *fh = &PL_sv_undef;
394		235
395	PUSHs (sv_2mortal (newSViv (req->result)));	236	if (req->result >= 0)
396	PUTBACK;	237	{
397	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	238	GV *gv = (GV *)sv_newmortal ();
398	SPAGAIN;	239	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		240	char sym [64];
		241	int symlen;
		242
		243	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		244	gv_init (gv, stash, sym, symlen, 0);
399		245
400	fh = SvREFCNT_inc (POPs);	246	symlen = snprintf (
		247	sym,
		248	sizeof (sym),
		249	"%s&=%d",
		250	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		251	req->result
		252	);
401		253
		254	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		255	fh = (SV *)gv;
		256	}
		257
402	PUSHMARK (SP);	258	PUSHs (fh);
403	XPUSHs (sv_2mortal (fh));
404	}	259	}
405	break;	260	break;
406		261
407	case REQ_GROUP:	262	case EIO_GROUP:
408	req->fd = 2; /* mark group as finished */	263	req->int1 = 2; /* mark group as finished */
409		264
410	if (req->data)	265	if (req->sv1)
411	{	266	{
412	int i;	267	int i;
413	AV *av = (AV *)req->data;	268	AV *av = (AV *)req->sv1;
414		269
415	EXTEND (SP, AvFILL (av) + 1);	270	EXTEND (SP, AvFILL (av) + 1);
416	for (i = 0; i <= AvFILL (av); ++i)	271	for (i = 0; i <= AvFILL (av); ++i)
417	PUSHs (*av_fetch (av, i, 0));	272	PUSHs (*av_fetch (av, i, 0));
418	}	273	}
419	break;	274	break;
420		275
421	case REQ_NOP:	276	case EIO_NOP:
422	case REQ_BUSY:	277	case EIO_BUSY:
423	break;	278	break;
		279
		280	case EIO_READLINK:
		281	if (req->result > 0)
		282	{
		283	SvCUR_set (req->sv2, req->result);
		284	*SvEND (req->sv2) = 0;
		285	PUSHs (req->sv2);
		286	}
		287	break;
		288
		289	case EIO_STAT:
		290	case EIO_LSTAT:
		291	case EIO_FSTAT:
		292	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		293	PL_laststatval = req->result;
		294	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		295	PUSHs (sv_2mortal (newSViv (req->result)));
		296	break;
		297
		298	case EIO_READ:
		299	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		300	*SvEND (req->sv2) = 0;
		301	PUSHs (sv_2mortal (newSViv (req->result)));
		302	break;
		303
		304	case EIO_DUP2:
		305	if (req->result > 0)
		306	req->result = 0;
		307	/* FALLTHROUGH */
424		308
425	default:	309	default:
426	PUSHs (sv_2mortal (newSViv (req->result)));	310	PUSHs (sv_2mortal (newSViv (req->result)));
427	break;	311	break;
428	}	312	}
429		313
		314	errno = req->errorno;
430		315
431	PUTBACK;	316	PUTBACK;
432	call_sv (req->callback, G_VOID | G_EVAL);	317	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
433	SPAGAIN;	318	SPAGAIN;
434		319
435	FREETMPS;	320	FREETMPS;
436	LEAVE;	321	LEAVE;
		322
		323	PUTBACK;
437	}	324	}
438		325
439	if (req->grp)	326	return !!SvTRUE (ERRSV);
440	{
441	aio_req grp = req->grp;
442
443	/* unlink request */
444	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
445	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
446
447	if (grp->grp_first == req)
448	grp->grp_first = req->grp_next;
449
450	aio_grp_dec (grp);
451	}
452
453	if (SvTRUE (ERRSV))
454	{
455	req_free (req);
456	croak (0);
457	}
458	}	327	}
459		328
460	static void req_free (aio_req req)	329	static void req_destroy (aio_req req)
461	{	330	{
462	if (req->self)	331	if (req->self)
463	{	332	{
464	sv_unmagic (req->self, PERL_MAGIC_ext);	333	sv_unmagic (req->self, PERL_MAGIC_ext);
465	SvREFCNT_dec (req->self);	334	SvREFCNT_dec (req->self);
466	}	335	}
467		336
468	SvREFCNT_dec (req->data);
469	SvREFCNT_dec (req->fh);	337	SvREFCNT_dec (req->sv1);
470	SvREFCNT_dec (req->fh2);	338	SvREFCNT_dec (req->sv2);
471	SvREFCNT_dec (req->callback);	339	SvREFCNT_dec (req->callback);
472	Safefree (req->statdata);
473
474	if (req->type == REQ_READDIR)
475	free (req->data2ptr);
476		340
477	Safefree (req);	341	Safefree (req);
478	}	342	}
479		343
480	static void req_cancel_subs (aio_req grp)	344	static void req_cancel_subs (aio_req grp)
481	{	345	{
482	aio_req sub;	346	aio_req sub;
483		347
484	if (grp->type != REQ_GROUP)	348	if (grp->type != EIO_GROUP)
485	return;	349	return;
486		350
487	SvREFCNT_dec (grp->fh2);	351	SvREFCNT_dec (grp->sv2);
488	grp->fh2 = 0;	352	grp->sv2 = 0;
489		353
490	for (sub = grp->grp_first; sub; sub = sub->grp_next)	354	eio_grp_cancel (grp);
491	req_cancel (sub);
492	}	355	}
493		356
494	static void req_cancel (aio_req req)	357	#ifdef USE_SOCKETS_AS_HANDLES
495	{	358	# define TO_SOCKET(x) (win32_get_osfhandle (x))
496	req->flags |= FLAG_CANCELLED;	359	#else
		360	# define TO_SOCKET(x) (x)
		361	#endif
497		362
498	req_cancel_subs (req);	363	static void
499	}	364	create_respipe (void)
500
501	static int poll_cb (int max)
502	{	365	{
503	dSP;	366	int old_readfd = respipe [0];
504	int count = 0;
505	int do_croak = 0;
506	aio_req req;
507		367
508	while (max <= 0 || count < max)	368	if (respipe [1] >= 0)
		369	respipe_close (TO_SOCKET (respipe [1]));
		370
		371	#ifdef _WIN32
		372	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		373	#else
		374	if (pipe (respipe))
		375	#endif
		376	croak ("unable to initialize result pipe");
		377
		378	if (old_readfd >= 0)
509	{	379	{
510	LOCK (reslock);	380	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
511	req = reqq_shift (&res_queue);	381	croak ("unable to initialize result pipe(2)");
512		382
513	if (req)	383	respipe_close (respipe [0]);
514	{	384	respipe [0] = old_readfd;
515	if (!res_queue.size)
516	{
517	/* read any signals sent by the worker threads */
518	char buf [32];
519	while (read (respipe [0], buf, 32) == 32)
520	;
521	}
522	}
523
524	UNLOCK (reslock);
525
526	if (!req)
527	break;
528
529	--nreqs;
530
531	if (req->type == REQ_QUIT)
532	started--;
533	else if (req->type == REQ_GROUP && req->length)
534	{
535	req->fd = 1; /* mark request as delayed */
536	continue;
537	}
538	else
539	{
540	if (req->type == REQ_READ)
541	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
542
543	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
544	SvREADONLY_off (req->data);
545
546	if (req->statdata)
547	{
548	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
549	PL_laststatval = req->result;
550	PL_statcache = *(req->statdata);
551	}
552
553	req_invoke (req);
554
555	count++;
556	}
557
558	req_free (req);
559	}	385	}
560		386
561	return count;	387	#ifdef _WIN32
562	}	388	int arg = 1;
		389	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		390	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		391	#else
		392	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		393	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		394	#endif
		395	croak ("unable to initialize result pipe(3)");
563		396
564	static void *aio_proc(void *arg);	397	respipe_osf [0] = TO_SOCKET (respipe [0]);
		398	respipe_osf [1] = TO_SOCKET (respipe [1]);
		399	}
565		400
566	static void start_thread (void)	401	static void poll_wait (void)
567	{	402	{
568	sigset_t fullsigset, oldsigset;	403	fd_set rfd;
569	pthread_attr_t attr;
570		404
571	worker *wrk = calloc (1, sizeof (worker));	405	while (eio_nreqs ())
572
573	if (!wrk)
574	croak ("unable to allocate worker thread data");
575
576	pthread_attr_init (&attr);
577	pthread_attr_setstacksize (&attr, STACKSIZE);
578	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
579
580	sigfillset (&fullsigset);
581
582	LOCK (wrklock);
583	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
584
585	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
586	{	406	{
587	wrk->prev = &wrk_first;	407	int size;
588	wrk->next = wrk_first.next;	408
589	wrk_first.next->prev = wrk;	409	X_LOCK (reslock);
590	wrk_first.next = wrk;	410	size = res_queue.size;
591	started++;	411	X_UNLOCK (reslock);
		412
		413	if (size)
		414	return;
		415
		416	maybe_start_thread ();
		417
		418	FD_ZERO (&rfd);
		419	FD_SET (respipe [0], &rfd);
		420
		421	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
592	}	422	}
593	else
594	free (wrk);
595
596	sigprocmask (SIG_SETMASK, &oldsigset, 0);
597	UNLOCK (wrklock);
598	}	423	}
599		424
600	static void req_send (aio_req req)	425	static int poll_cb (void)
601	{	426	{
602	while (started < wanted && nreqs >= started)	427	int res;
603	start_thread ();
604		428
605	++nreqs;	429	do
606
607	LOCK (reqlock);
608	reqq_push (&req_queue, req);
609	pthread_cond_signal (&reqwait);
610	UNLOCK (reqlock);
611	}
612
613	static void end_thread (void)
614	{
615	aio_req req;
616
617	Newz (0, req, 1, aio_cb);
618
619	req->type = REQ_QUIT;
620	req->pri = PRI_MAX + PRI_BIAS;
621
622	req_send (req);
623	}
624
625	static void min_parallel (int nthreads)
626	{
627	if (wanted < nthreads)
628	wanted = nthreads;
629	}
630
631	static void max_parallel (int nthreads)
632	{
633	int cur = started;
634
635	if (wanted > nthreads)
636	wanted = nthreads;
637
638	while (cur > wanted)
639	{	430	{
640	end_thread ();	431	res = eio_poll ();
641	cur--;	432
		433	if (res > 0)
		434	croak (0);
642	}	435	}
643		436	while (max_outstanding && max_outstanding <= eio_nreqs ());
644	while (started > wanted)
645	{
646	poll_wait ();
647	poll_cb (0);
648	}
649	}
650
651	static void create_pipe ()
652	{
653	if (pipe (respipe))
654	croak ("unable to initialize result pipe");
655
656	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
657	croak ("cannot set result pipe to nonblocking mode");
658
659	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
660	croak ("cannot set result pipe to nonblocking mode");
661	}
662
663	/*****************************************************************************/
664	/* work around various missing functions */
665
666	#if !HAVE_PREADWRITE
667	# define pread aio_pread
668	# define pwrite aio_pwrite
669
670	/*
671	* make our pread/pwrite safe against themselves, but not against
672	* normal read/write by using a mutex. slows down execution a lot,
673	* but that's your problem, not mine.
674	*/
675	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
676
677	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
678	{
679	ssize_t res;
680	off_t ooffset;
681
682	LOCK (preadwritelock);
683	ooffset = lseek (fd, 0, SEEK_CUR);
684	lseek (fd, offset, SEEK_SET);
685	res = read (fd, buf, count);
686	lseek (fd, ooffset, SEEK_SET);
687	UNLOCK (preadwritelock);
688		437
689	return res;	438	return res;
690	}	439	}
691		440
692	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
693	{
694	ssize_t res;
695	off_t ooffset;
696
697	LOCK (preadwritelock);
698	ooffset = lseek (fd, 0, SEEK_CUR);
699	lseek (fd, offset, SEEK_SET);
700	res = write (fd, buf, count);
701	lseek (fd, offset, SEEK_SET);
702	UNLOCK (preadwritelock);
703
704	return res;
705	}
706	#endif
707
708	#if !HAVE_FDATASYNC
709	# define fdatasync fsync
710	#endif
711
712	#if !HAVE_READAHEAD
713	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
714
715	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
716	{
717	dBUF;
718
719	while (count > 0)
720	{
721	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
722
723	pread (fd, aio_buf, len, offset);
724	offset += len;
725	count -= len;
726	}
727
728	errno = 0;
729	}
730
731	#endif
732
733	#if !HAVE_READDIR_R
734	# define readdir_r aio_readdir_r
735
736	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
737
738	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
739	{
740	struct dirent *e;
741	int errorno;
742
743	LOCK (readdirlock);
744
745	e = readdir (dirp);
746	errorno = errno;
747
748	if (e)
749	{
750	*res = ent;
751	strcpy (ent->d_name, e->d_name);
752	}
753	else
754	*res = 0;
755
756	UNLOCK (readdirlock);
757
758	errno = errorno;
759	return e ? 0 : -1;
760	}
761	#endif
762
763	/* sendfile always needs emulation */
764	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
765	{
766	ssize_t res;
767
768	if (!count)
769	return 0;
770
771	#if HAVE_SENDFILE
772	# if __linux
773	res = sendfile (ofd, ifd, &offset, count);
774
775	# elif __freebsd
776	/*
777	* Of course, the freebsd sendfile is a dire hack with no thoughts
778	* wasted on making it similar to other I/O functions.
779	*/
780	{
781	off_t sbytes;
782	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
783
784	if (res < 0 && sbytes)
785	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
786	res = sbytes;
787	}
788
789	# elif __hpux
790	res = sendfile (ofd, ifd, offset, count, 0, 0);
791
792	# elif __solaris
793	{
794	struct sendfilevec vec;
795	size_t sbytes;
796
797	vec.sfv_fd = ifd;
798	vec.sfv_flag = 0;
799	vec.sfv_off = offset;
800	vec.sfv_len = count;
801
802	res = sendfilev (ofd, &vec, 1, &sbytes);
803
804	if (res < 0 && sbytes)
805	res = sbytes;
806	}
807
808	# endif
809	#else
810	res = -1;
811	errno = ENOSYS;
812	#endif
813
814	if (res < 0
815	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
816	#if __solaris
817	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
818	#endif
819	)
820	)
821	{
822	/* emulate sendfile. this is a major pain in the ass */
823	dBUF;
824
825	res = 0;
826
827	while (count)
828	{
829	ssize_t cnt;
830
831	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
832
833	if (cnt <= 0)
834	{
835	if (cnt && !res) res = -1;
836	break;
837	}
838
839	cnt = write (ofd, aio_buf, cnt);
840
841	if (cnt <= 0)
842	{
843	if (cnt && !res) res = -1;
844	break;
845	}
846
847	offset += cnt;
848	res += cnt;
849	count -= cnt;
850	}
851	}
852
853	return res;
854	}
855
856	/* read a full directory */
857	static void scandir_ (aio_req req, worker *self)
858	{
859	DIR *dirp;
860	union
861	{
862	struct dirent d;
863	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
864	} *u;
865	struct dirent *entp;
866	char *name, *names;
867	int memlen = 4096;
868	int memofs = 0;
869	int res = 0;
870	int errorno;
871
872	LOCK (wrklock);
873	self->dirp = dirp = opendir (req->dataptr);
874	self->dbuf = u = malloc (sizeof (*u));
875	req->data2ptr = names = malloc (memlen);
876	UNLOCK (wrklock);
877
878	if (dirp && u && names)
879	for (;;)
880	{
881	errno = 0;
882	readdir_r (dirp, &u->d, &entp);
883
884	if (!entp)
885	break;
886
887	name = entp->d_name;
888
889	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
890	{
891	int len = strlen (name) + 1;
892
893	res++;
894
895	while (memofs + len > memlen)
896	{
897	memlen *= 2;
898	LOCK (wrklock);
899	req->data2ptr = names = realloc (names, memlen);
900	UNLOCK (wrklock);
901
902	if (!names)
903	break;
904	}
905
906	memcpy (names + memofs, name, len);
907	memofs += len;
908	}
909	}
910
911	if (errno)
912	res = -1;
913
914	req->result = res;
915	}
916
917	/*****************************************************************************/
918
919	static void *aio_proc (void *thr_arg)
920	{
921	aio_req req;
922	int type;
923	worker *self = (worker *)thr_arg;
924
925	do
926	{
927	LOCK (reqlock);
928
929	for (;;)
930	{
931	self->req = req = reqq_shift (&req_queue);
932
933	if (req)
934	break;
935
936	pthread_cond_wait (&reqwait, &reqlock);
937	}
938
939	UNLOCK (reqlock);
940
941	errno = 0; /* strictly unnecessary */
942	type = req->type; /* remember type for QUIT check */
943
944	if (!(req->flags & FLAG_CANCELLED))
945	switch (type)
946	{
947	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
948	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
949
950	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
951	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
952
953	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
954	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
955	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
956
957	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
958	case REQ_CLOSE: req->result = close (req->fd); break;
959	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
960	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
961	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
962	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
963	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
964
965	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
966	case REQ_FSYNC: req->result = fsync (req->fd); break;
967	case REQ_READDIR: scandir_ (req, self); break;
968
969	case REQ_BUSY:
970	{
971	struct timeval tv;
972
973	tv.tv_sec = req->fd;
974	tv.tv_usec = req->fd2;
975
976	req->result = select (0, 0, 0, 0, &tv);
977	}
978
979	case REQ_GROUP:
980	case REQ_NOP:
981	case REQ_QUIT:
982	break;
983
984	default:
985	req->result = ENOSYS;
986	break;
987	}
988
989	req->errorno = errno;
990
991	LOCK (reslock);
992
993	if (!reqq_push (&res_queue, req))
994	/* write a dummy byte to the pipe so fh becomes ready */
995	write (respipe [1], &respipe, 1);
996
997	self->req = 0;
998	worker_clear (self);
999
1000	UNLOCK (reslock);
1001	}
1002	while (type != REQ_QUIT);
1003
1004	LOCK (wrklock);
1005	worker_free (self);
1006	UNLOCK (wrklock);
1007
1008	return 0;
1009	}
1010
1011	/*****************************************************************************/
1012
1013	static void atfork_prepare (void)
1014	{
1015	LOCK (wrklock);
1016	LOCK (reqlock);
1017	LOCK (reslock);
1018	#if !HAVE_PREADWRITE
1019	LOCK (preadwritelock);
1020	#endif
1021	#if !HAVE_READDIR_R
1022	LOCK (readdirlock);
1023	#endif
1024	}
1025
1026	static void atfork_parent (void)
1027	{
1028	#if !HAVE_READDIR_R
1029	UNLOCK (readdirlock);
1030	#endif
1031	#if !HAVE_PREADWRITE
1032	UNLOCK (preadwritelock);
1033	#endif
1034	UNLOCK (reslock);
1035	UNLOCK (reqlock);
1036	UNLOCK (wrklock);
1037	}
1038
1039	static void atfork_child (void)	441	static void atfork_child (void)
1040	{	442	{
1041	aio_req prv;
1042
1043	while (prv = reqq_shift (&req_queue))
1044	req_free (prv);
1045
1046	while (prv = reqq_shift (&res_queue))
1047	req_free (prv);
1048
1049	while (wrk_first.next != &wrk_first)
1050	{
1051	worker *wrk = wrk_first.next;
1052
1053	if (wrk->req)
1054	req_free (wrk->req);
1055
1056	worker_clear (wrk);
1057	worker_free (wrk);
1058	}
1059
1060	started = 0;
1061	nreqs = 0;
1062
1063	close (respipe [0]);
1064	close (respipe [1]);
1065	create_pipe ();	443	create_respipe ();
1066
1067	atfork_parent ();
1068	}	444	}
1069		445
1070	#define dREQ \	446	#define dREQ \
1071	aio_req req; \	447	aio_req req; \
1072	int req_pri = next_pri; \	448	int req_pri = next_pri; \
1073	next_pri = DEFAULT_PRI + PRI_BIAS; \	449	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
1074	\	450	\
1075	if (SvOK (callback) && !SvROK (callback)) \	451	if (SvOK (callback) && !SvROK (callback)) \
1076	croak ("callback must be undef or of reference type"); \	452	croak ("callback must be undef or of reference type"); \
1077	\	453	\
1078	Newz (0, req, 1, aio_cb); \	454	Newz (0, req, 1, eio_req); \
1079	if (!req) \	455	if (!req) \
1080	croak ("out of memory during aio_req allocation"); \	456	croak ("out of memory during eio_req allocation"); \
1081	\	457	\
1082	req->callback = newSVsv (callback); \	458	req->callback = newSVsv (callback); \
1083	req->pri = req_pri	459	req->pri = req_pri
1084		460
1085	#define REQ_SEND \	461	#define REQ_SEND \
1086	req_send (req); \	462	req_submit (req); \
1087	\	463	\
1088	if (GIMME_V != G_VOID) \	464	if (GIMME_V != G_VOID) \
1089	XPUSHs (req_sv (req, AIO_REQ_KLASS));	465	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1090		466
1091	MODULE = IO::AIO PACKAGE = IO::AIO	467	MODULE = IO::AIO PACKAGE = IO::AIO
1092		468
1093	PROTOTYPES: ENABLE	469	PROTOTYPES: ENABLE
1094		470
1095	BOOT:	471	BOOT:
1096	{	472	{
1097	HV *stash = gv_stashpv ("IO::AIO", 1);	473	stash = gv_stashpv ("IO::AIO", 1);
		474
1098	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	475	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1099	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	476	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1100	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	477	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		478	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		479	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		480	#ifdef _WIN32
		481	X_MUTEX_CHECK (wrklock);
		482	X_MUTEX_CHECK (reslock);
		483	X_MUTEX_CHECK (reqlock);
		484	X_MUTEX_CHECK (reqwait);
		485	X_MUTEX_CHECK (preadwritelock);
		486	X_MUTEX_CHECK (readdirlock);
1101		487
1102	create_pipe ();	488	X_COND_CHECK (reqwait);
1103	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	489	#else
1104	}	490	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		491	#endif
1105		492
		493	create_respipe ();
		494
		495	if (eio_init (want_poll, done_poll) < 0)
		496	croak ("IO::AIO: unable to initialise eio library");
		497
		498	/* atfork child called in fifo order, so before eio's handler */
		499	X_THREAD_ATFORK (0, 0, atfork_child);
		500	}
		501
1106	void	502	void
1107	min_parallel (nthreads)	503	max_poll_reqs (int nreqs)
1108	int nthreads
1109	PROTOTYPE: $	504	PROTOTYPE: $
		505	CODE:
		506	eio_set_max_poll_reqs (nreqs);
1110		507
1111	void	508	void
1112	max_parallel (nthreads)	509	max_poll_time (double nseconds)
1113	int nthreads
1114	PROTOTYPE: $	510	PROTOTYPE: $
		511	CODE:
		512	eio_set_max_poll_time (nseconds);
1115		513
1116	void	514	void
		515	min_parallel (int nthreads)
		516	PROTOTYPE: $
		517	CODE:
		518	eio_set_min_parallel (nthreads);
		519
		520	void
		521	max_parallel (int nthreads)
		522	PROTOTYPE: $
		523	CODE:
		524	eio_set_max_parallel (nthreads);
		525
		526	void
		527	max_idle (int nthreads)
		528	PROTOTYPE: $
		529	CODE:
		530	eio_set_max_idle (nthreads);
		531
		532	void
		533	max_outstanding (int maxreqs)
		534	PROTOTYPE: $
		535	CODE:
		536	max_outstanding = maxreqs;
		537
		538	void
1117	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	539	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1118	SV * pathname
1119	int flags
1120	int mode
1121	SV * callback
1122	PROTOTYPE: $$$;$	540	PROTOTYPE: $$$;$
1123	PPCODE:	541	PPCODE:
1124	{	542	{
1125	dREQ;	543	dREQ;
1126		544
1127	req->type = REQ_OPEN;	545	req->type = EIO_OPEN;
1128	req->data = newSVsv (pathname);	546	req->sv1 = newSVsv (pathname);
1129	req->dataptr = SvPVbyte_nolen (req->data);	547	req->ptr1 = SvPVbyte_nolen (req->sv1);
1130	req->fd = flags;	548	req->int1 = flags;
1131	req->mode = mode;	549	req->int2 = mode;
1132		550
1133	REQ_SEND;	551	REQ_SEND;
1134	}	552	}
1135		553
1136	void	554	void
1137	aio_close (fh,callback=&PL_sv_undef)	555	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1138	SV * fh
1139	SV * callback
1140	PROTOTYPE: $;$	556	PROTOTYPE: $;$
1141	ALIAS:	557	ALIAS:
1142	aio_close = REQ_CLOSE
1143	aio_fsync = REQ_FSYNC	558	aio_fsync = EIO_FSYNC
1144	aio_fdatasync = REQ_FDATASYNC	559	aio_fdatasync = EIO_FDATASYNC
1145	PPCODE:	560	PPCODE:
1146	{	561	{
1147	dREQ;	562	dREQ;
1148		563
1149	req->type = ix;	564	req->type = ix;
1150	req->fh = newSVsv (fh);	565	req->sv1 = newSVsv (fh);
1151	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	566	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1152		567
1153	REQ_SEND (req);	568	REQ_SEND (req);
1154	}	569	}
1155		570
1156	void	571	void
		572	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		573	PROTOTYPE: $;$
		574	PPCODE:
		575	{
		576	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		577	dREQ;
		578
		579	if (close_pipe < 0)
		580	{
		581	int pipefd [2];
		582
		583	if (pipe (pipefd) < 0
		584	|| close (pipefd [1]) < 0
		585	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		586	abort (); /*D*/
		587
		588	close_pipe = pipefd [0];
		589	}
		590
		591	req->type = EIO_DUP2;
		592	req->int1 = close_pipe;
		593	req->sv2 = newSVsv (fh);
		594	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		595
		596	REQ_SEND (req);
		597	}
		598
		599	void
1157	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	600	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1158	SV * fh
1159	UV offset
1160	UV length
1161	SV * data
1162	UV dataoffset
1163	SV * callback
1164	ALIAS:	601	ALIAS:
1165	aio_read = REQ_READ	602	aio_read = EIO_READ
1166	aio_write = REQ_WRITE	603	aio_write = EIO_WRITE
1167	PROTOTYPE: $$$$$;$	604	PROTOTYPE: $$$$$;$
1168	PPCODE:	605	PPCODE:
1169	{	606	{
1170	aio_req req;
1171	STRLEN svlen;	607	STRLEN svlen;
1172	char *svptr = SvPVbyte (data, svlen);	608	char *svptr = SvPVbyte (data, svlen);
		609	UV len = SvUV (length);
1173		610
1174	SvUPGRADE (data, SVt_PV);	611	SvUPGRADE (data, SVt_PV);
1175	SvPOK_on (data);	612	SvPOK_on (data);
1176		613
1177	if (dataoffset < 0)	614	if (dataoffset < 0)
1178	dataoffset += svlen;	615	dataoffset += svlen;
1179		616
1180	if (dataoffset < 0 || dataoffset > svlen)	617	if (dataoffset < 0 || dataoffset > svlen)
1181	croak ("data offset outside of string");	618	croak ("dataoffset outside of data scalar");
1182		619
1183	if (ix == REQ_WRITE)	620	if (ix == EIO_WRITE)
1184	{	621	{
1185	/* write: check length and adjust. */	622	/* write: check length and adjust. */
1186	if (length < 0 || length + dataoffset > svlen)	623	if (!SvOK (length) || len + dataoffset > svlen)
1187	length = svlen - dataoffset;	624	len = svlen - dataoffset;
1188	}	625	}
1189	else	626	else
1190	{	627	{
1191	/* read: grow scalar as necessary */	628	/* read: grow scalar as necessary */
1192	svptr = SvGROW (data, length + dataoffset);	629	svptr = SvGROW (data, len + dataoffset + 1);
1193	}	630	}
1194		631
1195	if (length < 0)	632	if (len < 0)
1196	croak ("length must not be negative");	633	croak ("length must not be negative");
1197		634
1198	{	635	{
1199	dREQ;	636	dREQ;
1200		637
1201	req->type = ix;	638	req->type = ix;
1202	req->fh = newSVsv (fh);	639	req->sv1 = newSVsv (fh);
1203	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	640	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1204	: IoOFP (sv_2io (fh)));	641	: IoOFP (sv_2io (fh)));
		642	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1205	req->offset = offset;	643	req->size = len;
1206	req->length = length;
1207	req->data = SvREFCNT_inc (data);	644	req->sv2 = SvREFCNT_inc (data);
1208	req->dataptr = (char *)svptr + dataoffset;	645	req->ptr2 = (char *)svptr + dataoffset;
		646	req->stroffset = dataoffset;
1209		647
1210	if (!SvREADONLY (data))	648	if (!SvREADONLY (data))
1211	{	649	{
1212	SvREADONLY_on (data);	650	SvREADONLY_on (data);
1213	req->data2ptr = (void *)data;	651	req->flags |= FLAG_SV2_RO_OFF;
1214	}	652	}
1215		653
1216	REQ_SEND;	654	REQ_SEND;
1217	}	655	}
1218	}	656	}
1219		657
1220	void	658	void
		659	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		660	PROTOTYPE: $$;$
		661	PPCODE:
		662	{
		663	SV *data;
		664	dREQ;
		665
		666	data = newSV (NAME_MAX);
		667	SvPOK_on (data);
		668
		669	req->type = EIO_READLINK;
		670	req->sv1 = newSVsv (path);
		671	req->ptr1 = SvPVbyte_nolen (req->sv1);
		672	req->sv2 = data;
		673	req->ptr2 = SvPVbyte_nolen (data);
		674
		675	REQ_SEND;
		676	}
		677
		678	void
1221	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	679	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1222	SV * out_fh
1223	SV * in_fh
1224	UV in_offset
1225	UV length
1226	SV * callback
1227	PROTOTYPE: $$$$;$	680	PROTOTYPE: $$$$;$
1228	PPCODE:	681	PPCODE:
1229	{	682	{
1230	dREQ;	683	dREQ;
1231		684
1232	req->type = REQ_SENDFILE;	685	req->type = EIO_SENDFILE;
1233	req->fh = newSVsv (out_fh);	686	req->sv1 = newSVsv (out_fh);
1234	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	687	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1235	req->fh2 = newSVsv (in_fh);	688	req->sv2 = newSVsv (in_fh);
1236	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	689	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1237	req->offset = in_offset;	690	req->offs = SvVAL64 (in_offset);
1238	req->length = length;	691	req->size = length;
1239		692
1240	REQ_SEND;	693	REQ_SEND;
1241	}	694	}
1242		695
1243	void	696	void
1244	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	697	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1245	SV * fh
1246	UV offset
1247	IV length
1248	SV * callback
1249	PROTOTYPE: $$$;$	698	PROTOTYPE: $$$;$
1250	PPCODE:	699	PPCODE:
1251	{	700	{
1252	dREQ;	701	dREQ;
1253		702
1254	req->type = REQ_READAHEAD;	703	req->type = EIO_READAHEAD;
1255	req->fh = newSVsv (fh);	704	req->sv1 = newSVsv (fh);
1256	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	705	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1257	req->offset = offset;	706	req->offs = SvVAL64 (offset);
1258	req->length = length;	707	req->size = length;
1259		708
1260	REQ_SEND;	709	REQ_SEND;
1261	}	710	}
1262		711
1263	void	712	void
1264	aio_stat (fh_or_path,callback=&PL_sv_undef)	713	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1265	SV * fh_or_path
1266	SV * callback
1267	ALIAS:	714	ALIAS:
1268	aio_stat = REQ_STAT	715	aio_stat = EIO_STAT
1269	aio_lstat = REQ_LSTAT	716	aio_lstat = EIO_LSTAT
1270	PPCODE:	717	PPCODE:
1271	{	718	{
1272	dREQ;	719	dREQ;
1273		720
1274	New (0, req->statdata, 1, Stat_t);	721	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1275	if (!req->statdata)	722	if (!req->ptr2)
1276	{	723	{
1277	req_free (req);	724	req_destroy (req);
1278	croak ("out of memory during aio_req->statdata allocation");	725	croak ("out of memory during aio_stat statdata allocation");
1279	}	726	}
		727
		728	req->flags |= EIO_FLAG_PTR2_FREE;
		729	req->sv1 = newSVsv (fh_or_path);
1280		730
1281	if (SvPOK (fh_or_path))	731	if (SvPOK (fh_or_path))
1282	{	732	{
1283	req->type = ix;	733	req->type = ix;
1284	req->data = newSVsv (fh_or_path);
1285	req->dataptr = SvPVbyte_nolen (req->data);	734	req->ptr1 = SvPVbyte_nolen (req->sv1);
1286	}	735	}
1287	else	736	else
1288	{	737	{
1289	req->type = REQ_FSTAT;	738	req->type = EIO_FSTAT;
1290	req->fh = newSVsv (fh_or_path);
1291	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	739	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1292	}	740	}
1293		741
1294	REQ_SEND;	742	REQ_SEND;
1295	}	743	}
1296		744
1297	void	745	void
		746	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		747	PPCODE:
		748	{
		749	dREQ;
		750
		751	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		752	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		753	req->sv1 = newSVsv (fh_or_path);
		754
		755	if (SvPOK (fh_or_path))
		756	{
		757	req->type = EIO_UTIME;
		758	req->ptr1 = SvPVbyte_nolen (req->sv1);
		759	}
		760	else
		761	{
		762	req->type = EIO_FUTIME;
		763	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		764	}
		765
		766	REQ_SEND;
		767	}
		768
		769	void
		770	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		771	PPCODE:
		772	{
		773	dREQ;
		774
		775	req->sv1 = newSVsv (fh_or_path);
		776	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		777
		778	if (SvPOK (fh_or_path))
		779	{
		780	req->type = EIO_TRUNCATE;
		781	req->ptr1 = SvPVbyte_nolen (req->sv1);
		782	}
		783	else
		784	{
		785	req->type = EIO_FTRUNCATE;
		786	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		787	}
		788
		789	REQ_SEND;
		790	}
		791
		792	void
		793	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		794	ALIAS:
		795	aio_chmod = EIO_CHMOD
		796	aio_fchmod = EIO_FCHMOD
		797	aio_mkdir = EIO_MKDIR
		798	PPCODE:
		799	{
		800	dREQ;
		801
		802	req->type = ix;
		803	req->int2 = mode;
		804	req->sv1 = newSVsv (fh_or_path);
		805
		806	if (ix == EIO_FCHMOD)
		807	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		808	else
		809	req->ptr1 = SvPVbyte_nolen (req->sv1);
		810
		811	REQ_SEND;
		812	}
		813
		814	void
		815	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		816	PPCODE:
		817	{
		818	dREQ;
		819
		820	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		821	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		822	req->sv1 = newSVsv (fh_or_path);
		823
		824	if (SvPOK (fh_or_path))
		825	{
		826	req->type = EIO_CHOWN;
		827	req->ptr1 = SvPVbyte_nolen (req->sv1);
		828	}
		829	else
		830	{
		831	req->type = EIO_FCHOWN;
		832	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		833	}
		834
		835	REQ_SEND;
		836	}
		837
		838	void
1298	aio_unlink (pathname,callback=&PL_sv_undef)	839	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1299	SV * pathname
1300	SV * callback
1301	ALIAS:	840	ALIAS:
1302	aio_unlink = REQ_UNLINK	841	aio_unlink = EIO_UNLINK
1303	aio_rmdir = REQ_RMDIR	842	aio_rmdir = EIO_RMDIR
1304	aio_readdir = REQ_READDIR	843	aio_readdir = EIO_READDIR
1305	PPCODE:	844	PPCODE:
1306	{	845	{
1307	dREQ;	846	dREQ;
1308		847
1309	req->type = ix;	848	req->type = ix;
1310	req->data = newSVsv (pathname);	849	req->sv1 = newSVsv (pathname);
1311	req->dataptr = SvPVbyte_nolen (req->data);	850	req->ptr1 = SvPVbyte_nolen (req->sv1);
		851
		852	REQ_SEND;
		853	}
		854
		855	void
		856	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		857	ALIAS:
		858	aio_link = EIO_LINK
		859	aio_symlink = EIO_SYMLINK
		860	aio_rename = EIO_RENAME
		861	PPCODE:
		862	{
		863	dREQ;
		864
		865	req->type = ix;
		866	req->sv1 = newSVsv (oldpath);
		867	req->ptr1 = SvPVbyte_nolen (req->sv1);
		868	req->sv2 = newSVsv (newpath);
		869	req->ptr2 = SvPVbyte_nolen (req->sv2);
1312		870
1313	REQ_SEND;	871	REQ_SEND;
1314	}	872	}
1315		873
1316	void	874	void
1317	aio_link (oldpath,newpath,callback=&PL_sv_undef)	875	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1318	SV * oldpath
1319	SV * newpath
1320	SV * callback
1321	ALIAS:
1322	aio_link = REQ_LINK
1323	aio_symlink = REQ_SYMLINK
1324	aio_rename = REQ_RENAME
1325	PPCODE:	876	PPCODE:
1326	{	877	{
1327	dREQ;	878	dREQ;
1328		879
1329	req->type = ix;	880	req->type = EIO_MKNOD;
1330	req->fh = newSVsv (oldpath);	881	req->sv1 = newSVsv (pathname);
1331	req->data2ptr = SvPVbyte_nolen (req->fh);	882	req->ptr1 = SvPVbyte_nolen (req->sv1);
1332	req->data = newSVsv (newpath);	883	req->int2 = (mode_t)mode;
1333	req->dataptr = SvPVbyte_nolen (req->data);	884	req->offs = dev;
1334		885
1335	REQ_SEND;	886	REQ_SEND;
1336	}	887	}
1337		888
1338	void	889	void
1339	aio_busy (delay,callback=&PL_sv_undef)	890	aio_busy (double delay, SV *callback=&PL_sv_undef)
1340	double delay
1341	SV * callback
1342	PPCODE:	891	PPCODE:
1343	{	892	{
1344	dREQ;	893	dREQ;
1345		894
1346	req->type = REQ_BUSY;	895	req->type = EIO_BUSY;
1347	req->fd = delay < 0. ? 0 : delay;	896	req->nv1 = delay < 0. ? 0. : delay;
1348	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1349		897
1350	REQ_SEND;	898	REQ_SEND;
1351	}	899	}
1352		900
1353	void	901	void
1354	aio_group (callback=&PL_sv_undef)	902	aio_group (SV *callback=&PL_sv_undef)
1355	SV * callback
1356	PROTOTYPE: ;$	903	PROTOTYPE: ;$
1357	PPCODE:	904	PPCODE:
1358	{	905	{
1359	dREQ;	906	dREQ;
1360		907
1361	req->type = REQ_GROUP;	908	req->type = EIO_GROUP;
		909
1362	req_send (req);	910	eio_submit (req);
1363
1364	XPUSHs (req_sv (req, AIO_GRP_KLASS));	911	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1365	}	912	}
1366		913
1367	void	914	void
1368	aio_nop (callback=&PL_sv_undef)	915	aio_nop (SV *callback=&PL_sv_undef)
1369	SV * callback	916	ALIAS:
		917	aio_nop = EIO_NOP
		918	aio_sync = EIO_SYNC
1370	PPCODE:	919	PPCODE:
1371	{	920	{
1372	dREQ;	921	dREQ;
1373		922
1374	req->type = REQ_NOP;	923	req->type = ix;
1375		924
1376	REQ_SEND;	925	REQ_SEND;
1377	}	926	}
1378		927
1379	void	928	int
1380	aioreq_pri (int pri = DEFAULT_PRI)	929	aioreq_pri (int pri = 0)
1381	CODE:	930	PROTOTYPE: ;$
		931	CODE:
		932	RETVAL = next_pri - EIO_PRI_BIAS;
		933	if (items > 0)
		934	{
1382	if (pri < PRI_MIN) pri = PRI_MIN;	935	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1383	if (pri > PRI_MAX) pri = PRI_MAX;	936	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1384	next_pri = pri + PRI_BIAS;	937	next_pri = pri + EIO_PRI_BIAS;
		938	}
		939	OUTPUT:
		940	RETVAL
1385		941
1386	void	942	void
1387	aioreq_nice (int nice = 0)	943	aioreq_nice (int nice = 0)
1388	CODE:	944	CODE:
1389	nice = next_pri - nice;	945	nice = next_pri - nice;
1390	if (nice < PRI_MIN) nice = PRI_MIN;	946	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1391	if (nice > PRI_MAX) nice = PRI_MAX;	947	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1392	next_pri = nice + PRI_BIAS;	948	next_pri = nice + EIO_PRI_BIAS;
1393		949
1394	void	950	void
1395	flush ()	951	flush ()
1396	PROTOTYPE:	952	PROTOTYPE:
1397	CODE:	953	CODE:
1398	while (nreqs)	954	while (eio_nreqs ())
1399	{	955	{
1400	poll_wait ();	956	poll_wait ();
1401	poll_cb (0);	957	poll_cb ();
1402	}	958	}
1403		959
1404	void	960	int
1405	poll()	961	poll()
1406	PROTOTYPE:	962	PROTOTYPE:
1407	CODE:	963	CODE:
1408	if (nreqs)
1409	{
1410	poll_wait ();	964	poll_wait ();
1411	poll_cb (0);	965	RETVAL = poll_cb ();
1412	}	966	OUTPUT:
		967	RETVAL
1413		968
1414	int	969	int
1415	poll_fileno()	970	poll_fileno()
1416	PROTOTYPE:	971	PROTOTYPE:
1417	CODE:	972	CODE:
…		…
1421		976
1422	int	977	int
1423	poll_cb(...)	978	poll_cb(...)
1424	PROTOTYPE:	979	PROTOTYPE:
1425	CODE:	980	CODE:
1426	RETVAL = poll_cb (0);	981	RETVAL = poll_cb ();
1427	OUTPUT:	982	OUTPUT:
1428	RETVAL	983	RETVAL
1429		984
1430	int
1431	poll_some(int max = 0)
1432	PROTOTYPE: $
1433	CODE:
1434	RETVAL = poll_cb (max);
1435	OUTPUT:
1436	RETVAL
1437
1438	void	985	void
1439	poll_wait()	986	poll_wait()
1440	PROTOTYPE:	987	PROTOTYPE:
1441	CODE:	988	CODE:
1442	if (nreqs)
1443	poll_wait ();	989	poll_wait ();
1444		990
1445	int	991	int
1446	nreqs()	992	nreqs()
1447	PROTOTYPE:	993	PROTOTYPE:
1448	CODE:	994	CODE:
1449	RETVAL = nreqs;	995	RETVAL = eio_nreqs ();
1450	OUTPUT:	996	OUTPUT:
1451	RETVAL	997	RETVAL
1452		998
		999	int
		1000	nready()
		1001	PROTOTYPE:
		1002	CODE:
		1003	RETVAL = eio_nready ();
		1004	OUTPUT:
		1005	RETVAL
		1006
		1007	int
		1008	npending()
		1009	PROTOTYPE:
		1010	CODE:
		1011	RETVAL = eio_npending ();
		1012	OUTPUT:
		1013	RETVAL
		1014
		1015	int
		1016	nthreads()
		1017	PROTOTYPE:
		1018	CODE:
		1019	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		1020	RETVAL = started;
		1021	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		1022	OUTPUT:
		1023	RETVAL
		1024
		1025	void _on_next_submit (SV *cb)
		1026	CODE:
		1027	SvREFCNT_dec (on_next_submit);
		1028	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1029
1453	PROTOTYPES: DISABLE	1030	PROTOTYPES: DISABLE
1454		1031
1455	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1032	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1456		1033
1457	void	1034	void
1458	cancel (aio_req_ornot req)	1035	cancel (aio_req_ornot req)
1459	CODE:	1036	CODE:
1460	req_cancel (req);	1037	eio_cancel (req);
1461		1038
1462	void	1039	void
1463	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1040	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1464	CODE:	1041	CODE:
1465	SvREFCNT_dec (req->callback);	1042	SvREFCNT_dec (req->callback);
…		…
1470	void	1047	void
1471	add (aio_req grp, ...)	1048	add (aio_req grp, ...)
1472	PPCODE:	1049	PPCODE:
1473	{	1050	{
1474	int i;	1051	int i;
1475	aio_req req;
1476		1052
1477	if (grp->fd == 2)	1053	if (grp->int1 == 2)
1478	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1054	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1479		1055
1480	for (i = 1; i < items; ++i )	1056	for (i = 1; i < items; ++i )
1481	{	1057	{
		1058	aio_req req;
		1059
1482	if (GIMME_V != G_VOID)	1060	if (GIMME_V != G_VOID)
1483	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1061	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1484		1062
1485	req = SvAIO_REQ (ST (i));	1063	req = SvAIO_REQ (ST (i));
1486		1064
1487	if (req)	1065	if (req)
1488	{	1066	eio_grp_add (grp, req);
1489	++grp->length;
1490	req->grp = grp;
1491
1492	req->grp_prev = 0;
1493	req->grp_next = grp->grp_first;
1494
1495	if (grp->grp_first)
1496	grp->grp_first->grp_prev = req;
1497
1498	grp->grp_first = req;
1499	}
1500	}	1067	}
1501	}	1068	}
1502		1069
1503	void	1070	void
1504	cancel_subs (aio_req_ornot req)	1071	cancel_subs (aio_req_ornot req)
…		…
1508	void	1075	void
1509	result (aio_req grp, ...)	1076	result (aio_req grp, ...)
1510	CODE:	1077	CODE:
1511	{	1078	{
1512	int i;	1079	int i;
		1080	AV *av;
		1081
		1082	grp->errorno = errno;
		1083
1513	AV *av = newAV ();	1084	av = newAV ();
1514		1085
1515	for (i = 1; i < items; ++i )	1086	for (i = 1; i < items; ++i )
1516	av_push (av, newSVsv (ST (i)));	1087	av_push (av, newSVsv (ST (i)));
1517		1088
1518	SvREFCNT_dec (grp->data);	1089	SvREFCNT_dec (grp->sv1);
1519	grp->data = (SV *)av;	1090	grp->sv1 = (SV *)av;
1520	}	1091	}
		1092
		1093	void
		1094	errno (aio_req grp, int errorno = errno)
		1095	CODE:
		1096	grp->errorno = errorno;
1521		1097
1522	void	1098	void
1523	limit (aio_req grp, int limit)	1099	limit (aio_req grp, int limit)
1524	CODE:	1100	CODE:
1525	grp->fd2 = limit;	1101	eio_grp_limit (grp, limit);
1526	aio_grp_feed (grp);
1527		1102
1528	void	1103	void
1529	feed (aio_req grp, SV *callback=&PL_sv_undef)	1104	feed (aio_req grp, SV *callback=&PL_sv_undef)
1530	CODE:	1105	CODE:
1531	{	1106	{
1532	SvREFCNT_dec (grp->fh2);	1107	SvREFCNT_dec (grp->sv2);
1533	grp->fh2 = newSVsv (callback);	1108	grp->sv2 = newSVsv (callback);
1534		1109
1535	if (grp->fd2 <= 0)	1110	if (grp->int2 <= 0)
1536	grp->fd2 = 2;	1111	grp->int2 = 2;
1537		1112
1538	aio_grp_feed (grp);	1113	eio_grp_limit (grp, grp->int2);
1539	}	1114	}
1540		1115

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