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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.74 by root, Wed Oct 25 17:57:30 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
5	# define _GNU_SOURCE
6	#endif
7
8	#define _REENTRANT 1
9		2
10	#include <errno.h>	3	#include <errno.h>
11		4
12	#include "EXTERN.h"	5	#include "EXTERN.h"
13	#include "perl.h"	6	#include "perl.h"
14	#include "XSUB.h"	7	#include "XSUB.h"
15		8
16	#include "autoconf/config.h"
17
18	#include <pthread.h>
19
20	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
21	#include <errno.h>	11	#include <errno.h>
22	#include <sys/time.h>
23	#include <sys/select.h>
24	#include <sys/types.h>	12	#include <sys/types.h>
25	#include <sys/stat.h>	13	#include <sys/stat.h>
26	#include <limits.h>	14	#include <limits.h>
27	#include <unistd.h>
28	#include <fcntl.h>	15	#include <fcntl.h>
29	#include <signal.h>
30	#include <sched.h>	16	#include <sched.h>
31		17
32	#if HAVE_SENDFILE	18	#ifdef _WIN32
33	# if __linux	19
34	# include <sys/sendfile.h>	20	# define EIO_STRUCT_DIRENT Direntry_t
35	# elif __freebsd	21	# undef malloc
36	# include <sys/socket.h>	22	# undef free
37	# include <sys/uio.h>	23
38	# elif __hpux	24	// perl overrides all those nice win32 functions
39	# include <sys/socket.h>	25	# undef open
40	# elif __solaris /* not yet */	26	# undef read
41	# 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
42	# else	56	#else
43	# error sendfile support requested but not available	57
44	# 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
45	#endif	65	#endif
46		66
47	/* used for struct dirent, AIX doesn't provide it */	67	#define EIO_STRUCT_STAT Stat_t
48	#ifndef NAME_MAX	68
49	# 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
50	#endif	74	#endif
51		75
52	#if __ia64	76	static HV *stash;
53	# define STACKSIZE 65536	77	typedef SV SV8; /* byte-sv, used for argument-checking */
54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
55	# define STACKSIZE PTHREAD_STACK_MIN
56	#else
57	# define STACKSIZE 16384
58	#endif
59
60	/* buffer size for various temporary buffers */
61	#define AIO_BUFSIZE 65536
62
63	#define dBUF \
64	char *aio_buf; \
65	LOCK (wrklock); \
66	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
67	UNLOCK (wrklock); \
68	if (!aio_buf) \
69	return -1;
70
71	enum {
72	REQ_QUIT,
73	REQ_OPEN, REQ_CLOSE,
74	REQ_READ, REQ_WRITE, REQ_READAHEAD,
75	REQ_SENDFILE,
76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
77	REQ_FSYNC, REQ_FDATASYNC,
78	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
79	REQ_READDIR,
80	REQ_LINK, REQ_SYMLINK,
81	REQ_GROUP, REQ_NOP,
82	REQ_BUSY,
83	};
84		78
85	#define AIO_REQ_KLASS "IO::AIO::REQ"	79	#define AIO_REQ_KLASS "IO::AIO::REQ"
86	#define AIO_GRP_KLASS "IO::AIO::GRP"	80	#define AIO_GRP_KLASS "IO::AIO::GRP"
87		81
88	typedef struct aio_cb	82	#define EIO_COMMON \
89	{
90	struct aio_cb *volatile next;
91
92	SV *data, *callback;	83	SV *callback; \
93	SV *fh, *fh2;	84	SV *sv1, *sv2; \
94	void *dataptr, *data2ptr;
95	Stat_t *statdata;
96	off_t offset;
97	size_t length;
98	ssize_t result;
99
100	STRLEN dataoffset;	85	STRLEN stroffset; \
101	int type;	86	SV *self
102	int fd, fd2;
103	int errorno;
104	mode_t mode; /* open */
105		87
106	unsigned char flags;	88	#include "libeio/eio.h"
107	unsigned char pri;
108		89
109	SV *self; /* the perl counterpart of this request, if any */	90	static int req_invoke (eio_req *req);
110	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	91	#define EIO_FINISH(req) req_invoke (req)
111	} 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)
112		96
113	enum {	97	enum {
114	FLAG_CANCELLED = 0x01,	98	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
115	};	99	};
116		100
		101	#include "libeio/eio.c"
		102
117	typedef aio_cb *aio_req;	103	typedef eio_req *aio_req;
118	typedef aio_cb *aio_req_ornot;	104	typedef eio_req *aio_req_ornot;
119		105
120	enum {	106	static SV *on_next_submit;
121	PRI_MIN = -4,
122	PRI_MAX = 4,
123
124	DEFAULT_PRI = 0,
125	PRI_BIAS = -PRI_MIN,
126	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
127	};
128
129	static int next_pri = DEFAULT_PRI + PRI_BIAS;	107	static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
		108	static int max_outstanding;
130		109
131	static int started, wanted;	110	static int respipe_osf [2], respipe [2] = { -1, -1 };
132	static volatile int nreqs;
133	static int respipe [2];
134		111
135	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
136	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
137	#else
138	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
139	#endif
140
141	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
142	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
143
144	/* worker threasd management */
145	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
146
147	typedef struct worker {
148	/* locked by wrklock */
149	struct worker *prev, *next;
150
151	pthread_t tid;
152
153	/* locked by reslock, reqlock or wrklock */
154	aio_req req; /* currently processed request */
155	void *dbuf;
156	DIR *dirp;
157	} worker;
158
159	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
160
161	static void worker_clear (worker *wrk)
162	{
163	if (wrk->dirp)
164	{
165	closedir (wrk->dirp);
166	wrk->dirp = 0;
167	}
168
169	if (wrk->dbuf)
170	{
171	free (wrk->dbuf);
172	wrk->dbuf = 0;
173	}
174	}
175
176	static void worker_free (worker *wrk)
177	{
178	wrk->next->prev = wrk->prev;
179	wrk->prev->next = wrk->next;
180
181	free (wrk);
182	}
183
184	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
185	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
186	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
187
188	/*
189	* a somewhat faster data structure might be nice, but
190	* with 8 priorities this actually needs <20 insns
191	* per shift, the most expensive operation.
192	*/
193	typedef struct {
194	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
195	int size;
196	} reqq;
197
198	static reqq req_queue;
199	static reqq res_queue;
200
201	int reqq_push (reqq *q, aio_req req)
202	{
203	int pri = req->pri;
204	req->next = 0;
205
206	if (q->qe[pri])
207	{
208	q->qe[pri]->next = req;
209	q->qe[pri] = req;
210	}
211	else
212	q->qe[pri] = q->qs[pri] = req;
213
214	return q->size++;
215	}
216
217	aio_req reqq_shift (reqq *q)
218	{
219	int pri;
220
221	if (!q->size)
222	return 0;
223
224	--q->size;
225
226	for (pri = NUM_PRI; pri--; )
227	{
228	aio_req req = q->qs[pri];
229
230	if (req)
231	{
232	if (!(q->qs[pri] = req->next))
233	q->qe[pri] = 0;
234
235	return req;
236	}
237	}
238
239	abort ();
240	}
241
242	static int poll_cb ();
243	static void req_invoke (aio_req req);
244	static void req_free (aio_req req);	112	static void req_destroy (aio_req req);
245	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	}
246		128
247	/* must be called at most once */	129	/* must be called at most once */
248	static SV *req_sv (aio_req req, const char *klass)	130	static SV *req_sv (aio_req req, const char *klass)
249	{	131	{
250	if (!req->self)	132	if (!req->self)
…		…
268	return mg ? (aio_req)mg->mg_ptr : 0;	150	return mg ? (aio_req)mg->mg_ptr : 0;
269	}	151	}
270		152
271	static void aio_grp_feed (aio_req grp)	153	static void aio_grp_feed (aio_req grp)
272	{	154	{
273	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	155	if (grp->sv2 && SvOK (grp->sv2))
274	{	156	{
275	int old_len = grp->length;
276
277	if (grp->fh2 && SvOK (grp->fh2))
278	{
279	dSP;	157	dSP;
280		158
281	ENTER;	159	ENTER;
282	SAVETMPS;	160	SAVETMPS;
283	PUSHMARK (SP);	161	PUSHMARK (SP);
284	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	162	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
285	PUTBACK;	163	PUTBACK;
286	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	164	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
287	SPAGAIN;	165	SPAGAIN;
288	FREETMPS;	166	FREETMPS;
289	LEAVE;	167	LEAVE;
290	}
291
292	/* stop if no progress has been made */
293	if (old_len == grp->length)
294	{
295	SvREFCNT_dec (grp->fh2);
296	grp->fh2 = 0;
297	break;
298	}
299	}	168	}
300	}	169	}
301		170
302	static void aio_grp_dec (aio_req grp)	171	static void req_submit (eio_req *req)
303	{	172	{
304	--grp->length;	173	eio_submit (req);
305		174
306	/* call feeder, if applicable */	175	if (on_next_submit)
307	aio_grp_feed (grp);
308
309	/* finish, if done */
310	if (!grp->length && grp->fd)
311	{	176	{
312	req_invoke (grp);	177	dSP;
313	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);
314	}	185	}
315	}	186	}
316		187
317	static void poll_wait ()	188	static int req_invoke (eio_req *req)
318	{	189	{
319	fd_set rfd;	190	dSP;
320		191
321	while (nreqs)	192	if (req->flags & FLAG_SV2_RO_OFF)
		193	SvREADONLY_off (req->sv2);
		194
		195	if (!EIO_CANCELLED (req) && SvOK (req->callback))
322	{	196	{
323	int size;
324	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
325	LOCK (reslock);
326	#endif
327	size = res_queue.size;
328	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
329	UNLOCK (reslock);
330	#endif
331
332	if (size)
333	return;
334
335	FD_ZERO(&rfd);
336	FD_SET(respipe [0], &rfd);
337
338	select (respipe [0] + 1, &rfd, 0, 0, 0);
339	}
340	}
341
342	static void req_invoke (aio_req req)
343	{
344	dSP;
345
346	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
347	{
348	errno = req->errorno;
349
350	ENTER;	197	ENTER;
351	SAVETMPS;	198	SAVETMPS;
352	PUSHMARK (SP);	199	PUSHMARK (SP);
353	EXTEND (SP, 1);	200	EXTEND (SP, 1);
354		201
355	switch (req->type)	202	switch (req->type)
356	{	203	{
357	case REQ_READDIR:	204	case EIO_READDIR:
358	{	205	{
359	SV *rv = &PL_sv_undef;	206	SV *rv = &PL_sv_undef;
360		207
361	if (req->result >= 0)	208	if (req->result >= 0)
362	{	209	{
363	int i;	210	int i;
364	char *buf = req->data2ptr;	211	char *buf = req->ptr2;
365	AV *av = newAV ();	212	AV *av = newAV ();
366		213
367	av_extend (av, req->result - 1);	214	av_extend (av, req->result - 1);
368		215
369	for (i = 0; i < req->result; ++i)	216	for (i = 0; i < req->result; ++i)
…		…
379		226
380	PUSHs (rv);	227	PUSHs (rv);
381	}	228	}
382	break;	229	break;
383		230
384	case REQ_OPEN:	231	case EIO_OPEN:
385	{	232	{
386	/* convert fd to fh */	233	/* convert fd to fh */
387	SV *fh;	234	SV *fh = &PL_sv_undef;
388		235
389	PUSHs (sv_2mortal (newSViv (req->result)));	236	if (req->result >= 0)
390	PUTBACK;	237	{
391	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	238	GV *gv = (GV *)sv_newmortal ();
392	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);
393		245
394	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	);
395		253
		254	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		255	fh = (SV *)gv;
		256	}
		257
396	PUSHMARK (SP);	258	PUSHs (fh);
397	XPUSHs (sv_2mortal (fh));
398	}	259	}
399	break;	260	break;
400		261
401	case REQ_GROUP:	262	case EIO_GROUP:
402	req->fd = 2; /* mark group as finished */	263	req->int1 = 2; /* mark group as finished */
403		264
404	if (req->data)	265	if (req->sv1)
405	{	266	{
406	int i;	267	int i;
407	AV *av = (AV *)req->data;	268	AV *av = (AV *)req->sv1;
408		269
409	EXTEND (SP, AvFILL (av) + 1);	270	EXTEND (SP, AvFILL (av) + 1);
410	for (i = 0; i <= AvFILL (av); ++i)	271	for (i = 0; i <= AvFILL (av); ++i)
411	PUSHs (*av_fetch (av, i, 0));	272	PUSHs (*av_fetch (av, i, 0));
412	}	273	}
413	break;	274	break;
414		275
415	case REQ_NOP:	276	case EIO_NOP:
416	case REQ_BUSY:	277	case EIO_BUSY:
417	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 */
418		308
419	default:	309	default:
420	PUSHs (sv_2mortal (newSViv (req->result)));	310	PUSHs (sv_2mortal (newSViv (req->result)));
421	break;	311	break;
422	}	312	}
423		313
		314	errno = req->errorno;
424		315
425	PUTBACK;	316	PUTBACK;
426	call_sv (req->callback, G_VOID | G_EVAL);	317	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
427	SPAGAIN;	318	SPAGAIN;
428		319
429	FREETMPS;	320	FREETMPS;
430	LEAVE;	321	LEAVE;
		322
		323	PUTBACK;
431	}	324	}
432		325
433	if (req->grp)	326	return !!SvTRUE (ERRSV);
434	{
435	aio_req grp = req->grp;
436
437	/* unlink request */
438	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
439	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
440
441	if (grp->grp_first == req)
442	grp->grp_first = req->grp_next;
443
444	aio_grp_dec (grp);
445	}
446
447	if (SvTRUE (ERRSV))
448	{
449	req_free (req);
450	croak (0);
451	}
452	}	327	}
453		328
454	static void req_free (aio_req req)	329	static void req_destroy (aio_req req)
455	{	330	{
456	if (req->self)	331	if (req->self)
457	{	332	{
458	sv_unmagic (req->self, PERL_MAGIC_ext);	333	sv_unmagic (req->self, PERL_MAGIC_ext);
459	SvREFCNT_dec (req->self);	334	SvREFCNT_dec (req->self);
460	}	335	}
461		336
462	SvREFCNT_dec (req->data);
463	SvREFCNT_dec (req->fh);	337	SvREFCNT_dec (req->sv1);
464	SvREFCNT_dec (req->fh2);	338	SvREFCNT_dec (req->sv2);
465	SvREFCNT_dec (req->callback);	339	SvREFCNT_dec (req->callback);
466	Safefree (req->statdata);
467
468	if (req->type == REQ_READDIR)
469	free (req->data2ptr);
470		340
471	Safefree (req);	341	Safefree (req);
472	}	342	}
473		343
474	static void req_cancel_subs (aio_req grp)	344	static void req_cancel_subs (aio_req grp)
475	{	345	{
476	aio_req sub;	346	aio_req sub;
477		347
478	if (grp->type != REQ_GROUP)	348	if (grp->type != EIO_GROUP)
479	return;	349	return;
480		350
481	SvREFCNT_dec (grp->fh2);	351	SvREFCNT_dec (grp->sv2);
482	grp->fh2 = 0;	352	grp->sv2 = 0;
483		353
484	for (sub = grp->grp_first; sub; sub = sub->grp_next)	354	eio_grp_cancel (grp);
485	req_cancel (sub);
486	}	355	}
487		356
488	static void req_cancel (aio_req req)	357	#ifdef USE_SOCKETS_AS_HANDLES
489	{	358	# define TO_SOCKET(x) (win32_get_osfhandle (x))
490	req->flags |= FLAG_CANCELLED;	359	#else
		360	# define TO_SOCKET(x) (x)
		361	#endif
491		362
492	req_cancel_subs (req);	363	static void
493	}	364	create_respipe (void)
494
495	static int poll_cb ()
496	{	365	{
497	dSP;	366	int old_readfd = respipe [0];
498	int count = 0;
499	int do_croak = 0;
500	aio_req req;
501		367
502	for (;;)	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)
503	{	379	{
504	LOCK (reslock);	380	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
505	req = reqq_shift (&res_queue);	381	croak ("unable to initialize result pipe(2)");
506		382
507	if (req)	383	respipe_close (respipe [0]);
508	{	384	respipe [0] = old_readfd;
509	if (!res_queue.size)
510	{
511	/* read any signals sent by the worker threads */
512	char buf [32];
513	while (read (respipe [0], buf, 32) == 32)
514	;
515	}
516	}
517
518	UNLOCK (reslock);
519
520	if (!req)
521	break;
522
523	--nreqs;
524
525	if (req->type == REQ_QUIT)
526	started--;
527	else if (req->type == REQ_GROUP && req->length)
528	{
529	req->fd = 1; /* mark request as delayed */
530	continue;
531	}
532	else
533	{
534	if (req->type == REQ_READ)
535	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
536
537	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
538	SvREADONLY_off (req->data);
539
540	if (req->statdata)
541	{
542	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
543	PL_laststatval = req->result;
544	PL_statcache = *(req->statdata);
545	}
546
547	req_invoke (req);
548
549	count++;
550	}
551
552	req_free (req);
553	}	385	}
554		386
555	return count;	387	#ifdef _WIN32
556	}	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)");
557		396
558	static void *aio_proc(void *arg);	397	respipe_osf [0] = TO_SOCKET (respipe [0]);
		398	respipe_osf [1] = TO_SOCKET (respipe [1]);
		399	}
559		400
560	static void start_thread (void)	401	static void poll_wait (void)
561	{	402	{
562	sigset_t fullsigset, oldsigset;	403	fd_set rfd;
563	pthread_attr_t attr;
564		404
565	worker *wrk = calloc (1, sizeof (worker));	405	while (eio_nreqs ())
566
567	if (!wrk)
568	croak ("unable to allocate worker thread data");
569
570	pthread_attr_init (&attr);
571	pthread_attr_setstacksize (&attr, STACKSIZE);
572	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
573
574	sigfillset (&fullsigset);
575
576	LOCK (wrklock);
577	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
578
579	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
580	{	406	{
581	wrk->prev = &wrk_first;	407	int size;
582	wrk->next = wrk_first.next;	408
583	wrk_first.next->prev = wrk;	409	X_LOCK (reslock);
584	wrk_first.next = wrk;	410	size = res_queue.size;
585	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);
586	}	422	}
587	else
588	free (wrk);
589
590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
591	UNLOCK (wrklock);
592	}	423	}
593		424
594	static void req_send (aio_req req)	425	static int poll_cb (void)
595	{	426	{
596	while (started < wanted && nreqs >= started)	427	int res;
597	start_thread ();
598		428
599	++nreqs;	429	do
600
601	LOCK (reqlock);
602	reqq_push (&req_queue, req);
603	pthread_cond_signal (&reqwait);
604	UNLOCK (reqlock);
605	}
606
607	static void end_thread (void)
608	{
609	aio_req req;
610
611	Newz (0, req, 1, aio_cb);
612
613	req->type = REQ_QUIT;
614	req->pri = PRI_MAX + PRI_BIAS;
615
616	req_send (req);
617	}
618
619	static void min_parallel (int nthreads)
620	{
621	if (wanted < nthreads)
622	wanted = nthreads;
623	}
624
625	static void max_parallel (int nthreads)
626	{
627	int cur = started;
628
629	if (wanted > nthreads)
630	wanted = nthreads;
631
632	while (cur > wanted)
633	{	430	{
634	end_thread ();	431	res = eio_poll ();
635	cur--;	432
		433	if (res > 0)
		434	croak (0);
636	}	435	}
637		436	while (max_outstanding && max_outstanding <= eio_nreqs ());
638	while (started > wanted)
639	{
640	poll_wait ();
641	poll_cb ();
642	}
643	}
644
645	static void create_pipe ()
646	{
647	if (pipe (respipe))
648	croak ("unable to initialize result pipe");
649
650	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
651	croak ("cannot set result pipe to nonblocking mode");
652
653	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
654	croak ("cannot set result pipe to nonblocking mode");
655	}
656
657	/*****************************************************************************/
658	/* work around various missing functions */
659
660	#if !HAVE_PREADWRITE
661	# define pread aio_pread
662	# define pwrite aio_pwrite
663
664	/*
665	* make our pread/pwrite safe against themselves, but not against
666	* normal read/write by using a mutex. slows down execution a lot,
667	* but that's your problem, not mine.
668	*/
669	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
670
671	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
672	{
673	ssize_t res;
674	off_t ooffset;
675
676	LOCK (preadwritelock);
677	ooffset = lseek (fd, 0, SEEK_CUR);
678	lseek (fd, offset, SEEK_SET);
679	res = read (fd, buf, count);
680	lseek (fd, ooffset, SEEK_SET);
681	UNLOCK (preadwritelock);
682		437
683	return res;	438	return res;
684	}	439	}
685		440
686	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
687	{
688	ssize_t res;
689	off_t ooffset;
690
691	LOCK (preadwritelock);
692	ooffset = lseek (fd, 0, SEEK_CUR);
693	lseek (fd, offset, SEEK_SET);
694	res = write (fd, buf, count);
695	lseek (fd, offset, SEEK_SET);
696	UNLOCK (preadwritelock);
697
698	return res;
699	}
700	#endif
701
702	#if !HAVE_FDATASYNC
703	# define fdatasync fsync
704	#endif
705
706	#if !HAVE_READAHEAD
707	# define readahead aio_readahead
708
709	static ssize_t readahead (int fd, off_t offset, size_t count)
710	{
711	dBUF;
712
713	while (count > 0)
714	{
715	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
716
717	pread (fd, aio_buf, len, offset);
718	offset += len;
719	count -= len;
720	}
721
722	errno = 0;
723	}
724	#endif
725
726	#if !HAVE_READDIR_R
727	# define readdir_r aio_readdir_r
728
729	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
730
731	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
732	{
733	struct dirent *e;
734	int errorno;
735
736	LOCK (readdirlock);
737
738	e = readdir (dirp);
739	errorno = errno;
740
741	if (e)
742	{
743	*res = ent;
744	strcpy (ent->d_name, e->d_name);
745	}
746	else
747	*res = 0;
748
749	UNLOCK (readdirlock);
750
751	errno = errorno;
752	return e ? 0 : -1;
753	}
754	#endif
755
756	/* sendfile always needs emulation */
757	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
758	{
759	ssize_t res;
760
761	if (!count)
762	return 0;
763
764	#if HAVE_SENDFILE
765	# if __linux
766	res = sendfile (ofd, ifd, &offset, count);
767
768	# elif __freebsd
769	/*
770	* Of course, the freebsd sendfile is a dire hack with no thoughts
771	* wasted on making it similar to other I/O functions.
772	*/
773	{
774	off_t sbytes;
775	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
776
777	if (res < 0 && sbytes)
778	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
779	res = sbytes;
780	}
781
782	# elif __hpux
783	res = sendfile (ofd, ifd, offset, count, 0, 0);
784
785	# elif __solaris
786	{
787	struct sendfilevec vec;
788	size_t sbytes;
789
790	vec.sfv_fd = ifd;
791	vec.sfv_flag = 0;
792	vec.sfv_off = offset;
793	vec.sfv_len = count;
794
795	res = sendfilev (ofd, &vec, 1, &sbytes);
796
797	if (res < 0 && sbytes)
798	res = sbytes;
799	}
800
801	# endif
802	#else
803	res = -1;
804	errno = ENOSYS;
805	#endif
806
807	if (res < 0
808	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
809	#if __solaris
810	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
811	#endif
812	)
813	)
814	{
815	/* emulate sendfile. this is a major pain in the ass */
816	dBUF;
817
818	res = 0;
819
820	while (count)
821	{
822	ssize_t cnt;
823
824	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
825
826	if (cnt <= 0)
827	{
828	if (cnt && !res) res = -1;
829	break;
830	}
831
832	cnt = write (ofd, aio_buf, cnt);
833
834	if (cnt <= 0)
835	{
836	if (cnt && !res) res = -1;
837	break;
838	}
839
840	offset += cnt;
841	res += cnt;
842	count -= cnt;
843	}
844	}
845
846	return res;
847	}
848
849	/* read a full directory */
850	static void scandir_ (aio_req req, worker *self)
851	{
852	DIR *dirp;
853	union
854	{
855	struct dirent d;
856	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
857	} *u;
858	struct dirent *entp;
859	char *name, *names;
860	int memlen = 4096;
861	int memofs = 0;
862	int res = 0;
863	int errorno;
864
865	LOCK (wrklock);
866	self->dirp = dirp = opendir (req->dataptr);
867	self->dbuf = u = malloc (sizeof (*u));
868	UNLOCK (wrklock);
869
870	req->data2ptr = names = malloc (memlen);
871
872	if (dirp && u && names)
873	for (;;)
874	{
875	errno = 0;
876	readdir_r (dirp, &u->d, &entp);
877
878	if (!entp)
879	break;
880
881	name = entp->d_name;
882
883	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
884	{
885	int len = strlen (name) + 1;
886
887	res++;
888
889	while (memofs + len > memlen)
890	{
891	memlen *= 2;
892	LOCK (wrklock);
893	req->data2ptr = names = realloc (names, memlen);
894	UNLOCK (wrklock);
895
896	if (!names)
897	break;
898	}
899
900	memcpy (names + memofs, name, len);
901	memofs += len;
902	}
903	}
904
905	if (errno)
906	res = -1;
907
908	req->result = res;
909	}
910
911	/*****************************************************************************/
912
913	static void *aio_proc (void *thr_arg)
914	{
915	aio_req req;
916	int type;
917	worker *self = (worker *)thr_arg;
918
919	do
920	{
921	LOCK (reqlock);
922
923	for (;;)
924	{
925	self->req = req = reqq_shift (&req_queue);
926
927	if (req)
928	break;
929
930	pthread_cond_wait (&reqwait, &reqlock);
931	}
932
933	UNLOCK (reqlock);
934
935	errno = 0; /* strictly unnecessary */
936	type = req->type; /* remember type for QUIT check */
937
938	if (!(req->flags & FLAG_CANCELLED))
939	switch (type)
940	{
941	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
942	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
943
944	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
945	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
946
947	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
948	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
949	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
950
951	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
952	case REQ_CLOSE: req->result = close (req->fd); break;
953	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
954	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
955	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
956	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
957	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
958
959	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
960	case REQ_FSYNC: req->result = fsync (req->fd); break;
961	case REQ_READDIR: scandir_ (req, self); break;
962
963	case REQ_BUSY:
964	{
965	struct timeval tv;
966
967	tv.tv_sec = req->fd;
968	tv.tv_usec = req->fd2;
969
970	req->result = select (0, 0, 0, 0, &tv);
971	}
972
973	case REQ_GROUP:
974	case REQ_NOP:
975	case REQ_QUIT:
976	break;
977
978	default:
979	req->result = ENOSYS;
980	break;
981	}
982
983	req->errorno = errno;
984
985	LOCK (reslock);
986
987	if (!reqq_push (&res_queue, req))
988	/* write a dummy byte to the pipe so fh becomes ready */
989	write (respipe [1], &respipe, 1);
990
991	self->req = 0;
992	worker_clear (self);
993
994	UNLOCK (reslock);
995	}
996	while (type != REQ_QUIT);
997
998	LOCK (wrklock);
999	worker_free (self);
1000	UNLOCK (wrklock);
1001
1002	return 0;
1003	}
1004
1005	/*****************************************************************************/
1006
1007	static void atfork_prepare (void)
1008	{
1009	LOCK (wrklock);
1010	LOCK (reqlock);
1011	LOCK (reslock);
1012	#if !HAVE_PREADWRITE
1013	LOCK (preadwritelock);
1014	#endif
1015	#if !HAVE_READDIR_R
1016	LOCK (readdirlock);
1017	#endif
1018	}
1019
1020	static void atfork_parent (void)
1021	{
1022	#if !HAVE_READDIR_R
1023	UNLOCK (readdirlock);
1024	#endif
1025	#if !HAVE_PREADWRITE
1026	UNLOCK (preadwritelock);
1027	#endif
1028	UNLOCK (reslock);
1029	UNLOCK (reqlock);
1030	UNLOCK (wrklock);
1031	}
1032
1033	static void atfork_child (void)	441	static void atfork_child (void)
1034	{	442	{
1035	aio_req prv;
1036
1037	while (prv = reqq_shift (&req_queue))
1038	req_free (prv);
1039
1040	while (prv = reqq_shift (&res_queue))
1041	req_free (prv);
1042
1043	while (wrk_first.next != &wrk_first)
1044	{
1045	worker *wrk = wrk_first.next;
1046
1047	if (wrk->req)
1048	req_free (wrk->req);
1049
1050	worker_clear (wrk);
1051	worker_free (wrk);
1052	}
1053
1054	started = 0;
1055	nreqs = 0;
1056
1057	close (respipe [0]);
1058	close (respipe [1]);
1059	create_pipe ();	443	create_respipe ();
1060
1061	atfork_parent ();
1062	}	444	}
1063		445
1064	#define dREQ \	446	#define dREQ \
1065	aio_req req; \	447	aio_req req; \
1066	int req_pri = next_pri; \	448	int req_pri = next_pri; \
1067	next_pri = DEFAULT_PRI + PRI_BIAS; \	449	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
1068	\	450	\
1069	if (SvOK (callback) && !SvROK (callback)) \	451	if (SvOK (callback) && !SvROK (callback)) \
1070	croak ("callback must be undef or of reference type"); \	452	croak ("callback must be undef or of reference type"); \
1071	\	453	\
1072	Newz (0, req, 1, aio_cb); \	454	Newz (0, req, 1, eio_req); \
1073	if (!req) \	455	if (!req) \
1074	croak ("out of memory during aio_req allocation"); \	456	croak ("out of memory during eio_req allocation"); \
1075	\	457	\
1076	req->callback = newSVsv (callback); \	458	req->callback = newSVsv (callback); \
1077	req->pri = req_pri	459	req->pri = req_pri
1078		460
1079	#define REQ_SEND \	461	#define REQ_SEND \
1080	req_send (req); \	462	req_submit (req); \
1081	\	463	\
1082	if (GIMME_V != G_VOID) \	464	if (GIMME_V != G_VOID) \
1083	XPUSHs (req_sv (req, AIO_REQ_KLASS));	465	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1084		466
1085	MODULE = IO::AIO PACKAGE = IO::AIO	467	MODULE = IO::AIO PACKAGE = IO::AIO
1086		468
1087	PROTOTYPES: ENABLE	469	PROTOTYPES: ENABLE
1088		470
1089	BOOT:	471	BOOT:
1090	{	472	{
1091	HV *stash = gv_stashpv ("IO::AIO", 1);	473	stash = gv_stashpv ("IO::AIO", 1);
		474
1092	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	475	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1093	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	476	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1094	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);
1095		487
1096	create_pipe ();	488	X_COND_CHECK (reqwait);
1097	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	489	#else
1098	}	490	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		491	#endif
1099		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
1100	void	502	void
1101	min_parallel (nthreads)	503	max_poll_reqs (int nreqs)
1102	int nthreads
1103	PROTOTYPE: $	504	PROTOTYPE: $
		505	CODE:
		506	eio_set_max_poll_reqs (nreqs);
1104		507
1105	void	508	void
1106	max_parallel (nthreads)	509	max_poll_time (double nseconds)
1107	int nthreads
1108	PROTOTYPE: $	510	PROTOTYPE: $
		511	CODE:
		512	eio_set_max_poll_time (nseconds);
1109		513
1110	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
1111	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	539	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1112	SV * pathname
1113	int flags
1114	int mode
1115	SV * callback
1116	PROTOTYPE: $$$;$	540	PROTOTYPE: $$$;$
1117	PPCODE:	541	PPCODE:
1118	{	542	{
1119	dREQ;	543	dREQ;
1120		544
1121	req->type = REQ_OPEN;	545	req->type = EIO_OPEN;
1122	req->data = newSVsv (pathname);	546	req->sv1 = newSVsv (pathname);
1123	req->dataptr = SvPVbyte_nolen (req->data);	547	req->ptr1 = SvPVbyte_nolen (req->sv1);
1124	req->fd = flags;	548	req->int1 = flags;
1125	req->mode = mode;	549	req->int2 = mode;
1126		550
1127	REQ_SEND;	551	REQ_SEND;
1128	}	552	}
1129		553
1130	void	554	void
1131	aio_close (fh,callback=&PL_sv_undef)	555	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1132	SV * fh
1133	SV * callback
1134	PROTOTYPE: $;$	556	PROTOTYPE: $;$
1135	ALIAS:	557	ALIAS:
1136	aio_close = REQ_CLOSE
1137	aio_fsync = REQ_FSYNC	558	aio_fsync = EIO_FSYNC
1138	aio_fdatasync = REQ_FDATASYNC	559	aio_fdatasync = EIO_FDATASYNC
1139	PPCODE:	560	PPCODE:
1140	{	561	{
1141	dREQ;	562	dREQ;
1142		563
1143	req->type = ix;	564	req->type = ix;
1144	req->fh = newSVsv (fh);	565	req->sv1 = newSVsv (fh);
1145	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	566	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1146		567
1147	REQ_SEND (req);	568	REQ_SEND (req);
1148	}	569	}
1149		570
1150	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
1151	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)
1152	SV * fh
1153	UV offset
1154	UV length
1155	SV * data
1156	UV dataoffset
1157	SV * callback
1158	ALIAS:	601	ALIAS:
1159	aio_read = REQ_READ	602	aio_read = EIO_READ
1160	aio_write = REQ_WRITE	603	aio_write = EIO_WRITE
1161	PROTOTYPE: $$$$$;$	604	PROTOTYPE: $$$$$;$
1162	PPCODE:	605	PPCODE:
1163	{	606	{
1164	aio_req req;
1165	STRLEN svlen;	607	STRLEN svlen;
1166	char *svptr = SvPVbyte (data, svlen);	608	char *svptr = SvPVbyte (data, svlen);
		609	UV len = SvUV (length);
1167		610
1168	SvUPGRADE (data, SVt_PV);	611	SvUPGRADE (data, SVt_PV);
1169	SvPOK_on (data);	612	SvPOK_on (data);
1170		613
1171	if (dataoffset < 0)	614	if (dataoffset < 0)
1172	dataoffset += svlen;	615	dataoffset += svlen;
1173		616
1174	if (dataoffset < 0 || dataoffset > svlen)	617	if (dataoffset < 0 || dataoffset > svlen)
1175	croak ("data offset outside of string");	618	croak ("dataoffset outside of data scalar");
1176		619
1177	if (ix == REQ_WRITE)	620	if (ix == EIO_WRITE)
1178	{	621	{
1179	/* write: check length and adjust. */	622	/* write: check length and adjust. */
1180	if (length < 0 || length + dataoffset > svlen)	623	if (!SvOK (length) || len + dataoffset > svlen)
1181	length = svlen - dataoffset;	624	len = svlen - dataoffset;
1182	}	625	}
1183	else	626	else
1184	{	627	{
1185	/* read: grow scalar as necessary */	628	/* read: grow scalar as necessary */
1186	svptr = SvGROW (data, length + dataoffset);	629	svptr = SvGROW (data, len + dataoffset + 1);
1187	}	630	}
1188		631
1189	if (length < 0)	632	if (len < 0)
1190	croak ("length must not be negative");	633	croak ("length must not be negative");
1191		634
1192	{	635	{
1193	dREQ;	636	dREQ;
1194		637
1195	req->type = ix;	638	req->type = ix;
1196	req->fh = newSVsv (fh);	639	req->sv1 = newSVsv (fh);
1197	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	640	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1198	: IoOFP (sv_2io (fh)));	641	: IoOFP (sv_2io (fh)));
		642	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1199	req->offset = offset;	643	req->size = len;
1200	req->length = length;
1201	req->data = SvREFCNT_inc (data);	644	req->sv2 = SvREFCNT_inc (data);
1202	req->dataptr = (char *)svptr + dataoffset;	645	req->ptr2 = (char *)svptr + dataoffset;
		646	req->stroffset = dataoffset;
1203		647
1204	if (!SvREADONLY (data))	648	if (!SvREADONLY (data))
1205	{	649	{
1206	SvREADONLY_on (data);	650	SvREADONLY_on (data);
1207	req->data2ptr = (void *)data;	651	req->flags |= FLAG_SV2_RO_OFF;
1208	}	652	}
1209		653
1210	REQ_SEND;	654	REQ_SEND;
1211	}	655	}
1212	}	656	}
1213		657
1214	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
1215	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)
1216	SV * out_fh
1217	SV * in_fh
1218	UV in_offset
1219	UV length
1220	SV * callback
1221	PROTOTYPE: $$$$;$	680	PROTOTYPE: $$$$;$
1222	PPCODE:	681	PPCODE:
1223	{	682	{
1224	dREQ;	683	dREQ;
1225		684
1226	req->type = REQ_SENDFILE;	685	req->type = EIO_SENDFILE;
1227	req->fh = newSVsv (out_fh);	686	req->sv1 = newSVsv (out_fh);
1228	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	687	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1229	req->fh2 = newSVsv (in_fh);	688	req->sv2 = newSVsv (in_fh);
1230	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	689	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1231	req->offset = in_offset;	690	req->offs = SvVAL64 (in_offset);
1232	req->length = length;	691	req->size = length;
1233		692
1234	REQ_SEND;	693	REQ_SEND;
1235	}	694	}
1236		695
1237	void	696	void
1238	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	697	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1239	SV * fh
1240	UV offset
1241	IV length
1242	SV * callback
1243	PROTOTYPE: $$$;$	698	PROTOTYPE: $$$;$
1244	PPCODE:	699	PPCODE:
1245	{	700	{
1246	dREQ;	701	dREQ;
1247		702
1248	req->type = REQ_READAHEAD;	703	req->type = EIO_READAHEAD;
1249	req->fh = newSVsv (fh);	704	req->sv1 = newSVsv (fh);
1250	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	705	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1251	req->offset = offset;	706	req->offs = SvVAL64 (offset);
1252	req->length = length;	707	req->size = length;
1253		708
1254	REQ_SEND;	709	REQ_SEND;
1255	}	710	}
1256		711
1257	void	712	void
1258	aio_stat (fh_or_path,callback=&PL_sv_undef)	713	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1259	SV * fh_or_path
1260	SV * callback
1261	ALIAS:	714	ALIAS:
1262	aio_stat = REQ_STAT	715	aio_stat = EIO_STAT
1263	aio_lstat = REQ_LSTAT	716	aio_lstat = EIO_LSTAT
1264	PPCODE:	717	PPCODE:
1265	{	718	{
1266	dREQ;	719	dREQ;
1267		720
1268	New (0, req->statdata, 1, Stat_t);	721	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1269	if (!req->statdata)	722	if (!req->ptr2)
1270	{	723	{
1271	req_free (req);	724	req_destroy (req);
1272	croak ("out of memory during aio_req->statdata allocation");	725	croak ("out of memory during aio_stat statdata allocation");
1273	}	726	}
		727
		728	req->flags |= EIO_FLAG_PTR2_FREE;
		729	req->sv1 = newSVsv (fh_or_path);
1274		730
1275	if (SvPOK (fh_or_path))	731	if (SvPOK (fh_or_path))
1276	{	732	{
1277	req->type = ix;	733	req->type = ix;
1278	req->data = newSVsv (fh_or_path);
1279	req->dataptr = SvPVbyte_nolen (req->data);	734	req->ptr1 = SvPVbyte_nolen (req->sv1);
1280	}	735	}
1281	else	736	else
1282	{	737	{
1283	req->type = REQ_FSTAT;	738	req->type = EIO_FSTAT;
1284	req->fh = newSVsv (fh_or_path);
1285	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	739	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1286	}	740	}
1287		741
1288	REQ_SEND;	742	REQ_SEND;
1289	}	743	}
1290		744
1291	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
1292	aio_unlink (pathname,callback=&PL_sv_undef)	839	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1293	SV * pathname
1294	SV * callback
1295	ALIAS:	840	ALIAS:
1296	aio_unlink = REQ_UNLINK	841	aio_unlink = EIO_UNLINK
1297	aio_rmdir = REQ_RMDIR	842	aio_rmdir = EIO_RMDIR
1298	aio_readdir = REQ_READDIR	843	aio_readdir = EIO_READDIR
1299	PPCODE:	844	PPCODE:
1300	{	845	{
1301	dREQ;	846	dREQ;
1302		847
1303	req->type = ix;	848	req->type = ix;
1304	req->data = newSVsv (pathname);	849	req->sv1 = newSVsv (pathname);
1305	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);
1306		870
1307	REQ_SEND;	871	REQ_SEND;
1308	}	872	}
1309		873
1310	void	874	void
1311	aio_link (oldpath,newpath,callback=&PL_sv_undef)	875	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1312	SV * oldpath
1313	SV * newpath
1314	SV * callback
1315	ALIAS:
1316	aio_link = REQ_LINK
1317	aio_symlink = REQ_SYMLINK
1318	aio_rename = REQ_RENAME
1319	PPCODE:	876	PPCODE:
1320	{	877	{
1321	dREQ;	878	dREQ;
1322		879
1323	req->type = ix;	880	req->type = EIO_MKNOD;
1324	req->fh = newSVsv (oldpath);	881	req->sv1 = newSVsv (pathname);
1325	req->data2ptr = SvPVbyte_nolen (req->fh);	882	req->ptr1 = SvPVbyte_nolen (req->sv1);
1326	req->data = newSVsv (newpath);	883	req->int2 = (mode_t)mode;
1327	req->dataptr = SvPVbyte_nolen (req->data);	884	req->offs = dev;
1328		885
1329	REQ_SEND;	886	REQ_SEND;
1330	}	887	}
1331		888
1332	void	889	void
1333	aio_busy (delay,callback=&PL_sv_undef)	890	aio_busy (double delay, SV *callback=&PL_sv_undef)
1334	double delay
1335	SV * callback
1336	PPCODE:	891	PPCODE:
1337	{	892	{
1338	dREQ;	893	dREQ;
1339		894
1340	req->type = REQ_BUSY;	895	req->type = EIO_BUSY;
1341	req->fd = delay < 0. ? 0 : delay;	896	req->nv1 = delay < 0. ? 0. : delay;
1342	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1343		897
1344	REQ_SEND;	898	REQ_SEND;
1345	}	899	}
1346		900
1347	void	901	void
1348	aio_group (callback=&PL_sv_undef)	902	aio_group (SV *callback=&PL_sv_undef)
1349	SV * callback
1350	PROTOTYPE: ;$	903	PROTOTYPE: ;$
1351	PPCODE:	904	PPCODE:
1352	{	905	{
1353	dREQ;	906	dREQ;
1354		907
1355	req->type = REQ_GROUP;	908	req->type = EIO_GROUP;
		909
1356	req_send (req);	910	eio_submit (req);
1357
1358	XPUSHs (req_sv (req, AIO_GRP_KLASS));	911	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1359	}	912	}
1360		913
1361	void	914	void
1362	aio_nop (callback=&PL_sv_undef)	915	aio_nop (SV *callback=&PL_sv_undef)
1363	SV * callback	916	ALIAS:
		917	aio_nop = EIO_NOP
		918	aio_sync = EIO_SYNC
1364	PPCODE:	919	PPCODE:
1365	{	920	{
1366	dREQ;	921	dREQ;
1367		922
1368	req->type = REQ_NOP;	923	req->type = ix;
1369		924
1370	REQ_SEND;	925	REQ_SEND;
1371	}	926	}
1372		927
1373	void	928	int
1374	aioreq_pri (int pri = DEFAULT_PRI)	929	aioreq_pri (int pri = 0)
1375	CODE:	930	PROTOTYPE: ;$
		931	CODE:
		932	RETVAL = next_pri - EIO_PRI_BIAS;
		933	if (items > 0)
		934	{
1376	if (pri < PRI_MIN) pri = PRI_MIN;	935	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1377	if (pri > PRI_MAX) pri = PRI_MAX;	936	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1378	next_pri = pri + PRI_BIAS;	937	next_pri = pri + EIO_PRI_BIAS;
		938	}
		939	OUTPUT:
		940	RETVAL
1379		941
1380	void	942	void
1381	aioreq_nice (int nice = 0)	943	aioreq_nice (int nice = 0)
1382	CODE:	944	CODE:
1383	nice = next_pri - nice;	945	nice = next_pri - nice;
1384	if (nice < PRI_MIN) nice = PRI_MIN;	946	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1385	if (nice > PRI_MAX) nice = PRI_MAX;	947	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1386	next_pri = nice + PRI_BIAS;	948	next_pri = nice + EIO_PRI_BIAS;
1387		949
1388	void	950	void
1389	flush ()	951	flush ()
1390	PROTOTYPE:	952	PROTOTYPE:
1391	CODE:	953	CODE:
1392	while (nreqs)	954	while (eio_nreqs ())
1393	{	955	{
1394	poll_wait ();	956	poll_wait ();
1395	poll_cb ();	957	poll_cb ();
1396	}	958	}
1397		959
1398	void	960	int
1399	poll()	961	poll()
1400	PROTOTYPE:	962	PROTOTYPE:
1401	CODE:	963	CODE:
1402	if (nreqs)
1403	{
1404	poll_wait ();	964	poll_wait ();
1405	poll_cb ();	965	RETVAL = poll_cb ();
1406	}	966	OUTPUT:
		967	RETVAL
1407		968
1408	int	969	int
1409	poll_fileno()	970	poll_fileno()
1410	PROTOTYPE:	971	PROTOTYPE:
1411	CODE:	972	CODE:
…		…
1423		984
1424	void	985	void
1425	poll_wait()	986	poll_wait()
1426	PROTOTYPE:	987	PROTOTYPE:
1427	CODE:	988	CODE:
1428	if (nreqs)
1429	poll_wait ();	989	poll_wait ();
1430		990
1431	int	991	int
1432	nreqs()	992	nreqs()
1433	PROTOTYPE:	993	PROTOTYPE:
1434	CODE:	994	CODE:
1435	RETVAL = nreqs;	995	RETVAL = eio_nreqs ();
1436	OUTPUT:	996	OUTPUT:
1437	RETVAL	997	RETVAL
1438		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
1439	PROTOTYPES: DISABLE	1030	PROTOTYPES: DISABLE
1440		1031
1441	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1032	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1442		1033
1443	void	1034	void
1444	cancel (aio_req_ornot req)	1035	cancel (aio_req_ornot req)
1445	CODE:	1036	CODE:
1446	req_cancel (req);	1037	eio_cancel (req);
1447		1038
1448	void	1039	void
1449	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1040	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1450	CODE:	1041	CODE:
1451	SvREFCNT_dec (req->callback);	1042	SvREFCNT_dec (req->callback);
…		…
1456	void	1047	void
1457	add (aio_req grp, ...)	1048	add (aio_req grp, ...)
1458	PPCODE:	1049	PPCODE:
1459	{	1050	{
1460	int i;	1051	int i;
1461	aio_req req;
1462		1052
1463	if (grp->fd == 2)	1053	if (grp->int1 == 2)
1464	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");
1465		1055
1466	for (i = 1; i < items; ++i )	1056	for (i = 1; i < items; ++i )
1467	{	1057	{
		1058	aio_req req;
		1059
1468	if (GIMME_V != G_VOID)	1060	if (GIMME_V != G_VOID)
1469	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1061	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1470		1062
1471	req = SvAIO_REQ (ST (i));	1063	req = SvAIO_REQ (ST (i));
1472		1064
1473	if (req)	1065	if (req)
1474	{	1066	eio_grp_add (grp, req);
1475	++grp->length;
1476	req->grp = grp;
1477
1478	req->grp_prev = 0;
1479	req->grp_next = grp->grp_first;
1480
1481	if (grp->grp_first)
1482	grp->grp_first->grp_prev = req;
1483
1484	grp->grp_first = req;
1485	}
1486	}	1067	}
1487	}	1068	}
1488		1069
1489	void	1070	void
1490	cancel_subs (aio_req_ornot req)	1071	cancel_subs (aio_req_ornot req)
…		…
1494	void	1075	void
1495	result (aio_req grp, ...)	1076	result (aio_req grp, ...)
1496	CODE:	1077	CODE:
1497	{	1078	{
1498	int i;	1079	int i;
		1080	AV *av;
		1081
		1082	grp->errorno = errno;
		1083
1499	AV *av = newAV ();	1084	av = newAV ();
1500		1085
1501	for (i = 1; i < items; ++i )	1086	for (i = 1; i < items; ++i )
1502	av_push (av, newSVsv (ST (i)));	1087	av_push (av, newSVsv (ST (i)));
1503		1088
1504	SvREFCNT_dec (grp->data);	1089	SvREFCNT_dec (grp->sv1);
1505	grp->data = (SV *)av;	1090	grp->sv1 = (SV *)av;
1506	}	1091	}
		1092
		1093	void
		1094	errno (aio_req grp, int errorno = errno)
		1095	CODE:
		1096	grp->errorno = errorno;
1507		1097
1508	void	1098	void
1509	limit (aio_req grp, int limit)	1099	limit (aio_req grp, int limit)
1510	CODE:	1100	CODE:
1511	grp->fd2 = limit;	1101	eio_grp_limit (grp, limit);
1512	aio_grp_feed (grp);
1513		1102
1514	void	1103	void
1515	feed (aio_req grp, SV *callback=&PL_sv_undef)	1104	feed (aio_req grp, SV *callback=&PL_sv_undef)
1516	CODE:	1105	CODE:
1517	{	1106	{
1518	SvREFCNT_dec (grp->fh2);	1107	SvREFCNT_dec (grp->sv2);
1519	grp->fh2 = newSVsv (callback);	1108	grp->sv2 = newSVsv (callback);
1520		1109
1521	if (grp->fd2 <= 0)	1110	if (grp->int2 <= 0)
1522	grp->fd2 = 2;	1111	grp->int2 = 2;
1523		1112
1524	aio_grp_feed (grp);	1113	eio_grp_limit (grp, grp->int2);
1525	}	1114	}
1526		1115

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