1 |
/* solaris */ |
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 |
|
11 |
#include <errno.h> |
12 |
|
13 |
#include "EXTERN.h" |
14 |
#include "perl.h" |
15 |
#include "XSUB.h" |
16 |
|
17 |
#include "autoconf/config.h" |
18 |
|
19 |
#include <pthread.h> |
20 |
|
21 |
#include <stddef.h> |
22 |
#include <errno.h> |
23 |
#include <sys/time.h> |
24 |
#include <sys/select.h> |
25 |
#include <sys/types.h> |
26 |
#include <sys/stat.h> |
27 |
#include <limits.h> |
28 |
#include <unistd.h> |
29 |
#include <fcntl.h> |
30 |
#include <signal.h> |
31 |
#include <sched.h> |
32 |
|
33 |
#if HAVE_SENDFILE |
34 |
# if __linux |
35 |
# include <sys/sendfile.h> |
36 |
# elif __freebsd |
37 |
# include <sys/socket.h> |
38 |
# include <sys/uio.h> |
39 |
# elif __hpux |
40 |
# include <sys/socket.h> |
41 |
# elif __solaris /* not yet */ |
42 |
# include <sys/sendfile.h> |
43 |
# else |
44 |
# error sendfile support requested but not available |
45 |
# endif |
46 |
#endif |
47 |
|
48 |
/* number of seconds after which idle threads exit */ |
49 |
#define IDLE_TIMEOUT 10 |
50 |
|
51 |
/* used for struct dirent, AIX doesn't provide it */ |
52 |
#ifndef NAME_MAX |
53 |
# define NAME_MAX 4096 |
54 |
#endif |
55 |
|
56 |
#ifndef PTHREAD_STACK_MIN |
57 |
/* care for broken platforms, e.g. windows */ |
58 |
# define PTHREAD_STACK_MIN 16384 |
59 |
#endif |
60 |
|
61 |
#if __ia64 |
62 |
# define STACKSIZE 65536 |
63 |
#elif __i386 || __x86_64 /* 16k is unreasonably high :( */ |
64 |
# define STACKSIZE PTHREAD_STACK_MIN |
65 |
#else |
66 |
# define STACKSIZE 16384 |
67 |
#endif |
68 |
|
69 |
/* wether word reads are potentially non-atomic. |
70 |
* this is conservatice, likely most arches this runs |
71 |
* on have atomic word read/writes. |
72 |
*/ |
73 |
#ifndef WORDREAD_UNSAFE |
74 |
# if __i386 || __x86_64 |
75 |
# define WORDREAD_UNSAFE 0 |
76 |
# else |
77 |
# define WORDREAD_UNSAFE 1 |
78 |
# endif |
79 |
#endif |
80 |
|
81 |
/* buffer size for various temporary buffers */ |
82 |
#define AIO_BUFSIZE 65536 |
83 |
|
84 |
#define dBUF \ |
85 |
char *aio_buf; \ |
86 |
LOCK (wrklock); \ |
87 |
self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \ |
88 |
UNLOCK (wrklock); \ |
89 |
if (!aio_buf) \ |
90 |
return -1; |
91 |
|
92 |
enum { |
93 |
REQ_QUIT, |
94 |
REQ_OPEN, REQ_CLOSE, |
95 |
REQ_READ, REQ_WRITE, REQ_READAHEAD, |
96 |
REQ_SENDFILE, |
97 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, |
98 |
REQ_FSYNC, REQ_FDATASYNC, |
99 |
REQ_UNLINK, REQ_RMDIR, REQ_RENAME, |
100 |
REQ_MKNOD, REQ_READDIR, |
101 |
REQ_LINK, REQ_SYMLINK, |
102 |
REQ_GROUP, REQ_NOP, |
103 |
REQ_BUSY, |
104 |
}; |
105 |
|
106 |
#define AIO_REQ_KLASS "IO::AIO::REQ" |
107 |
#define AIO_GRP_KLASS "IO::AIO::GRP" |
108 |
|
109 |
typedef struct aio_cb |
110 |
{ |
111 |
struct aio_cb *volatile next; |
112 |
|
113 |
SV *data, *callback; |
114 |
SV *fh, *fh2; |
115 |
void *dataptr, *data2ptr; |
116 |
Stat_t *statdata; |
117 |
off_t offset; |
118 |
size_t length; |
119 |
ssize_t result; |
120 |
|
121 |
STRLEN dataoffset; |
122 |
int type; |
123 |
int fd, fd2; |
124 |
int errorno; |
125 |
mode_t mode; /* open */ |
126 |
|
127 |
unsigned char flags; |
128 |
unsigned char pri; |
129 |
|
130 |
SV *self; /* the perl counterpart of this request, if any */ |
131 |
struct aio_cb *grp, *grp_prev, *grp_next, *grp_first; |
132 |
} aio_cb; |
133 |
|
134 |
enum { |
135 |
FLAG_CANCELLED = 0x01, |
136 |
}; |
137 |
|
138 |
typedef aio_cb *aio_req; |
139 |
typedef aio_cb *aio_req_ornot; |
140 |
|
141 |
enum { |
142 |
PRI_MIN = -4, |
143 |
PRI_MAX = 4, |
144 |
|
145 |
DEFAULT_PRI = 0, |
146 |
PRI_BIAS = -PRI_MIN, |
147 |
NUM_PRI = PRI_MAX + PRI_BIAS + 1, |
148 |
}; |
149 |
|
150 |
static int next_pri = DEFAULT_PRI + PRI_BIAS; |
151 |
|
152 |
static unsigned int started, idle, wanted; |
153 |
|
154 |
#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
155 |
# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
156 |
#else |
157 |
# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER |
158 |
#endif |
159 |
|
160 |
#define LOCK(mutex) pthread_mutex_lock (&(mutex)) |
161 |
#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex)) |
162 |
|
163 |
/* worker threads management */ |
164 |
static pthread_mutex_t wrklock = AIO_MUTEX_INIT; |
165 |
|
166 |
typedef struct worker { |
167 |
/* locked by wrklock */ |
168 |
struct worker *prev, *next; |
169 |
|
170 |
pthread_t tid; |
171 |
|
172 |
/* locked by reslock, reqlock or wrklock */ |
173 |
aio_req req; /* currently processed request */ |
174 |
void *dbuf; |
175 |
DIR *dirp; |
176 |
} worker; |
177 |
|
178 |
static worker wrk_first = { &wrk_first, &wrk_first, 0 }; |
179 |
|
180 |
static void worker_clear (worker *wrk) |
181 |
{ |
182 |
if (wrk->dirp) |
183 |
{ |
184 |
closedir (wrk->dirp); |
185 |
wrk->dirp = 0; |
186 |
} |
187 |
|
188 |
if (wrk->dbuf) |
189 |
{ |
190 |
free (wrk->dbuf); |
191 |
wrk->dbuf = 0; |
192 |
} |
193 |
} |
194 |
|
195 |
static void worker_free (worker *wrk) |
196 |
{ |
197 |
wrk->next->prev = wrk->prev; |
198 |
wrk->prev->next = wrk->next; |
199 |
|
200 |
free (wrk); |
201 |
} |
202 |
|
203 |
static volatile unsigned int nreqs, nready, npending; |
204 |
static volatile unsigned int max_idle = 4; |
205 |
static volatile unsigned int max_outstanding = 0xffffffff; |
206 |
static int respipe [2]; |
207 |
|
208 |
static pthread_mutex_t reslock = AIO_MUTEX_INIT; |
209 |
static pthread_mutex_t reqlock = AIO_MUTEX_INIT; |
210 |
static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
211 |
|
212 |
#if WORDREAD_UNSAFE |
213 |
|
214 |
static unsigned int get_nready () |
215 |
{ |
216 |
unsigned int retval; |
217 |
|
218 |
LOCK (reqlock); |
219 |
retval = nready; |
220 |
UNLOCK (reqlock); |
221 |
|
222 |
return retval; |
223 |
} |
224 |
|
225 |
static unsigned int get_npending () |
226 |
{ |
227 |
unsigned int retval; |
228 |
|
229 |
LOCK (reslock); |
230 |
retval = npending; |
231 |
UNLOCK (reslock); |
232 |
|
233 |
return retval; |
234 |
} |
235 |
|
236 |
#else |
237 |
|
238 |
# define get_nready() nready |
239 |
# define get_npending() npending |
240 |
|
241 |
#endif |
242 |
|
243 |
/* |
244 |
* a somewhat faster data structure might be nice, but |
245 |
* with 8 priorities this actually needs <20 insns |
246 |
* per shift, the most expensive operation. |
247 |
*/ |
248 |
typedef struct { |
249 |
aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */ |
250 |
int size; |
251 |
} reqq; |
252 |
|
253 |
static reqq req_queue; |
254 |
static reqq res_queue; |
255 |
|
256 |
int reqq_push (reqq *q, aio_req req) |
257 |
{ |
258 |
int pri = req->pri; |
259 |
req->next = 0; |
260 |
|
261 |
if (q->qe[pri]) |
262 |
{ |
263 |
q->qe[pri]->next = req; |
264 |
q->qe[pri] = req; |
265 |
} |
266 |
else |
267 |
q->qe[pri] = q->qs[pri] = req; |
268 |
|
269 |
return q->size++; |
270 |
} |
271 |
|
272 |
aio_req reqq_shift (reqq *q) |
273 |
{ |
274 |
int pri; |
275 |
|
276 |
if (!q->size) |
277 |
return 0; |
278 |
|
279 |
--q->size; |
280 |
|
281 |
for (pri = NUM_PRI; pri--; ) |
282 |
{ |
283 |
aio_req req = q->qs[pri]; |
284 |
|
285 |
if (req) |
286 |
{ |
287 |
if (!(q->qs[pri] = req->next)) |
288 |
q->qe[pri] = 0; |
289 |
|
290 |
return req; |
291 |
} |
292 |
} |
293 |
|
294 |
abort (); |
295 |
} |
296 |
|
297 |
static int poll_cb (int max); |
298 |
static void req_invoke (aio_req req); |
299 |
static void req_free (aio_req req); |
300 |
static void req_cancel (aio_req req); |
301 |
|
302 |
/* must be called at most once */ |
303 |
static SV *req_sv (aio_req req, const char *klass) |
304 |
{ |
305 |
if (!req->self) |
306 |
{ |
307 |
req->self = (SV *)newHV (); |
308 |
sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0); |
309 |
} |
310 |
|
311 |
return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1))); |
312 |
} |
313 |
|
314 |
static aio_req SvAIO_REQ (SV *sv) |
315 |
{ |
316 |
MAGIC *mg; |
317 |
|
318 |
if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv)) |
319 |
croak ("object of class " AIO_REQ_KLASS " expected"); |
320 |
|
321 |
mg = mg_find (SvRV (sv), PERL_MAGIC_ext); |
322 |
|
323 |
return mg ? (aio_req)mg->mg_ptr : 0; |
324 |
} |
325 |
|
326 |
static void aio_grp_feed (aio_req grp) |
327 |
{ |
328 |
while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED)) |
329 |
{ |
330 |
int old_len = grp->length; |
331 |
|
332 |
if (grp->fh2 && SvOK (grp->fh2)) |
333 |
{ |
334 |
dSP; |
335 |
|
336 |
ENTER; |
337 |
SAVETMPS; |
338 |
PUSHMARK (SP); |
339 |
XPUSHs (req_sv (grp, AIO_GRP_KLASS)); |
340 |
PUTBACK; |
341 |
call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR); |
342 |
SPAGAIN; |
343 |
FREETMPS; |
344 |
LEAVE; |
345 |
} |
346 |
|
347 |
/* stop if no progress has been made */ |
348 |
if (old_len == grp->length) |
349 |
{ |
350 |
SvREFCNT_dec (grp->fh2); |
351 |
grp->fh2 = 0; |
352 |
break; |
353 |
} |
354 |
} |
355 |
} |
356 |
|
357 |
static void aio_grp_dec (aio_req grp) |
358 |
{ |
359 |
--grp->length; |
360 |
|
361 |
/* call feeder, if applicable */ |
362 |
aio_grp_feed (grp); |
363 |
|
364 |
/* finish, if done */ |
365 |
if (!grp->length && grp->fd) |
366 |
{ |
367 |
req_invoke (grp); |
368 |
req_free (grp); |
369 |
} |
370 |
} |
371 |
|
372 |
static void req_invoke (aio_req req) |
373 |
{ |
374 |
dSP; |
375 |
|
376 |
if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback)) |
377 |
{ |
378 |
ENTER; |
379 |
SAVETMPS; |
380 |
PUSHMARK (SP); |
381 |
EXTEND (SP, 1); |
382 |
|
383 |
switch (req->type) |
384 |
{ |
385 |
case REQ_READDIR: |
386 |
{ |
387 |
SV *rv = &PL_sv_undef; |
388 |
|
389 |
if (req->result >= 0) |
390 |
{ |
391 |
int i; |
392 |
char *buf = req->data2ptr; |
393 |
AV *av = newAV (); |
394 |
|
395 |
av_extend (av, req->result - 1); |
396 |
|
397 |
for (i = 0; i < req->result; ++i) |
398 |
{ |
399 |
SV *sv = newSVpv (buf, 0); |
400 |
|
401 |
av_store (av, i, sv); |
402 |
buf += SvCUR (sv) + 1; |
403 |
} |
404 |
|
405 |
rv = sv_2mortal (newRV_noinc ((SV *)av)); |
406 |
} |
407 |
|
408 |
PUSHs (rv); |
409 |
} |
410 |
break; |
411 |
|
412 |
case REQ_OPEN: |
413 |
{ |
414 |
/* convert fd to fh */ |
415 |
SV *fh; |
416 |
|
417 |
PUSHs (sv_2mortal (newSViv (req->result))); |
418 |
PUTBACK; |
419 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
420 |
SPAGAIN; |
421 |
|
422 |
fh = SvREFCNT_inc (POPs); |
423 |
|
424 |
PUSHMARK (SP); |
425 |
XPUSHs (sv_2mortal (fh)); |
426 |
} |
427 |
break; |
428 |
|
429 |
case REQ_GROUP: |
430 |
req->fd = 2; /* mark group as finished */ |
431 |
|
432 |
if (req->data) |
433 |
{ |
434 |
int i; |
435 |
AV *av = (AV *)req->data; |
436 |
|
437 |
EXTEND (SP, AvFILL (av) + 1); |
438 |
for (i = 0; i <= AvFILL (av); ++i) |
439 |
PUSHs (*av_fetch (av, i, 0)); |
440 |
} |
441 |
break; |
442 |
|
443 |
case REQ_NOP: |
444 |
case REQ_BUSY: |
445 |
break; |
446 |
|
447 |
default: |
448 |
PUSHs (sv_2mortal (newSViv (req->result))); |
449 |
break; |
450 |
} |
451 |
|
452 |
errno = req->errorno; |
453 |
|
454 |
PUTBACK; |
455 |
call_sv (req->callback, G_VOID | G_EVAL); |
456 |
SPAGAIN; |
457 |
|
458 |
FREETMPS; |
459 |
LEAVE; |
460 |
} |
461 |
|
462 |
if (req->grp) |
463 |
{ |
464 |
aio_req grp = req->grp; |
465 |
|
466 |
/* unlink request */ |
467 |
if (req->grp_next) req->grp_next->grp_prev = req->grp_prev; |
468 |
if (req->grp_prev) req->grp_prev->grp_next = req->grp_next; |
469 |
|
470 |
if (grp->grp_first == req) |
471 |
grp->grp_first = req->grp_next; |
472 |
|
473 |
aio_grp_dec (grp); |
474 |
} |
475 |
|
476 |
if (SvTRUE (ERRSV)) |
477 |
{ |
478 |
req_free (req); |
479 |
croak (0); |
480 |
} |
481 |
} |
482 |
|
483 |
static void req_free (aio_req req) |
484 |
{ |
485 |
if (req->self) |
486 |
{ |
487 |
sv_unmagic (req->self, PERL_MAGIC_ext); |
488 |
SvREFCNT_dec (req->self); |
489 |
} |
490 |
|
491 |
SvREFCNT_dec (req->data); |
492 |
SvREFCNT_dec (req->fh); |
493 |
SvREFCNT_dec (req->fh2); |
494 |
SvREFCNT_dec (req->callback); |
495 |
Safefree (req->statdata); |
496 |
|
497 |
if (req->type == REQ_READDIR) |
498 |
free (req->data2ptr); |
499 |
|
500 |
Safefree (req); |
501 |
} |
502 |
|
503 |
static void req_cancel_subs (aio_req grp) |
504 |
{ |
505 |
aio_req sub; |
506 |
|
507 |
if (grp->type != REQ_GROUP) |
508 |
return; |
509 |
|
510 |
SvREFCNT_dec (grp->fh2); |
511 |
grp->fh2 = 0; |
512 |
|
513 |
for (sub = grp->grp_first; sub; sub = sub->grp_next) |
514 |
req_cancel (sub); |
515 |
} |
516 |
|
517 |
static void req_cancel (aio_req req) |
518 |
{ |
519 |
req->flags |= FLAG_CANCELLED; |
520 |
|
521 |
req_cancel_subs (req); |
522 |
} |
523 |
|
524 |
static void *aio_proc(void *arg); |
525 |
|
526 |
static void start_thread (void) |
527 |
{ |
528 |
sigset_t fullsigset, oldsigset; |
529 |
pthread_attr_t attr; |
530 |
|
531 |
worker *wrk = calloc (1, sizeof (worker)); |
532 |
|
533 |
if (!wrk) |
534 |
croak ("unable to allocate worker thread data"); |
535 |
|
536 |
pthread_attr_init (&attr); |
537 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
538 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
539 |
#ifdef PTHREAD_SCOPE_PROCESS |
540 |
pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
541 |
#endif |
542 |
|
543 |
sigfillset (&fullsigset); |
544 |
|
545 |
LOCK (wrklock); |
546 |
sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
547 |
|
548 |
if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0) |
549 |
{ |
550 |
wrk->prev = &wrk_first; |
551 |
wrk->next = wrk_first.next; |
552 |
wrk_first.next->prev = wrk; |
553 |
wrk_first.next = wrk; |
554 |
++started; |
555 |
} |
556 |
else |
557 |
free (wrk); |
558 |
|
559 |
sigprocmask (SIG_SETMASK, &oldsigset, 0); |
560 |
UNLOCK (wrklock); |
561 |
} |
562 |
|
563 |
static void maybe_start_thread () |
564 |
{ |
565 |
if (started >= wanted) |
566 |
return; |
567 |
|
568 |
/* todo: maybe use idle here, but might be less exact */ |
569 |
if ((int)nready <= (int)started - (int)(nreqs - get_nready () - get_npending ())) |
570 |
return; |
571 |
|
572 |
start_thread (); |
573 |
} |
574 |
|
575 |
static void req_send (aio_req req) |
576 |
{ |
577 |
++nreqs; |
578 |
|
579 |
LOCK (reqlock); |
580 |
++nready; |
581 |
reqq_push (&req_queue, req); |
582 |
pthread_cond_signal (&reqwait); |
583 |
UNLOCK (reqlock); |
584 |
|
585 |
maybe_start_thread (); |
586 |
} |
587 |
|
588 |
static void end_thread (void) |
589 |
{ |
590 |
aio_req req; |
591 |
|
592 |
Newz (0, req, 1, aio_cb); |
593 |
|
594 |
req->type = REQ_QUIT; |
595 |
req->pri = PRI_MAX + PRI_BIAS; |
596 |
|
597 |
LOCK (reqlock); |
598 |
reqq_push (&req_queue, req); |
599 |
pthread_cond_signal (&reqwait); |
600 |
UNLOCK (reqlock); |
601 |
|
602 |
LOCK (wrklock); |
603 |
--started; |
604 |
UNLOCK (wrklock); |
605 |
} |
606 |
|
607 |
static void min_parallel (int nthreads) |
608 |
{ |
609 |
if (wanted < nthreads) |
610 |
wanted = nthreads; |
611 |
} |
612 |
|
613 |
static void max_parallel (int nthreads) |
614 |
{ |
615 |
if (wanted > nthreads) |
616 |
wanted = nthreads; |
617 |
|
618 |
while (started > wanted) |
619 |
end_thread (); |
620 |
} |
621 |
|
622 |
static void poll_wait () |
623 |
{ |
624 |
fd_set rfd; |
625 |
|
626 |
while (nreqs) |
627 |
{ |
628 |
int size; |
629 |
if (WORDREAD_UNSAFE) LOCK (reslock); |
630 |
size = res_queue.size; |
631 |
if (WORDREAD_UNSAFE) UNLOCK (reslock); |
632 |
|
633 |
if (size) |
634 |
return; |
635 |
|
636 |
maybe_start_thread (); |
637 |
|
638 |
FD_ZERO(&rfd); |
639 |
FD_SET(respipe [0], &rfd); |
640 |
|
641 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
642 |
} |
643 |
} |
644 |
|
645 |
static int poll_cb (int max) |
646 |
{ |
647 |
dSP; |
648 |
int count = 0; |
649 |
int do_croak = 0; |
650 |
aio_req req; |
651 |
|
652 |
for (;;) |
653 |
{ |
654 |
while (max <= 0 || count < max) |
655 |
{ |
656 |
maybe_start_thread (); |
657 |
|
658 |
LOCK (reslock); |
659 |
req = reqq_shift (&res_queue); |
660 |
|
661 |
if (req) |
662 |
{ |
663 |
--npending; |
664 |
|
665 |
if (!res_queue.size) |
666 |
{ |
667 |
/* read any signals sent by the worker threads */ |
668 |
char buf [32]; |
669 |
while (read (respipe [0], buf, 32) == 32) |
670 |
; |
671 |
} |
672 |
} |
673 |
|
674 |
UNLOCK (reslock); |
675 |
|
676 |
if (!req) |
677 |
break; |
678 |
|
679 |
--nreqs; |
680 |
|
681 |
if (req->type == REQ_GROUP && req->length) |
682 |
{ |
683 |
req->fd = 1; /* mark request as delayed */ |
684 |
continue; |
685 |
} |
686 |
else |
687 |
{ |
688 |
if (req->type == REQ_READ) |
689 |
SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0)); |
690 |
|
691 |
if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE)) |
692 |
SvREADONLY_off (req->data); |
693 |
|
694 |
if (req->statdata) |
695 |
{ |
696 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
697 |
PL_laststatval = req->result; |
698 |
PL_statcache = *(req->statdata); |
699 |
} |
700 |
|
701 |
req_invoke (req); |
702 |
|
703 |
count++; |
704 |
} |
705 |
|
706 |
req_free (req); |
707 |
} |
708 |
|
709 |
if (nreqs <= max_outstanding) |
710 |
break; |
711 |
|
712 |
poll_wait (); |
713 |
|
714 |
max = 0; |
715 |
} |
716 |
|
717 |
return count; |
718 |
} |
719 |
|
720 |
static void create_pipe () |
721 |
{ |
722 |
if (pipe (respipe)) |
723 |
croak ("unable to initialize result pipe"); |
724 |
|
725 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
726 |
croak ("cannot set result pipe to nonblocking mode"); |
727 |
|
728 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
729 |
croak ("cannot set result pipe to nonblocking mode"); |
730 |
} |
731 |
|
732 |
/*****************************************************************************/ |
733 |
/* work around various missing functions */ |
734 |
|
735 |
#if !HAVE_PREADWRITE |
736 |
# define pread aio_pread |
737 |
# define pwrite aio_pwrite |
738 |
|
739 |
/* |
740 |
* make our pread/pwrite safe against themselves, but not against |
741 |
* normal read/write by using a mutex. slows down execution a lot, |
742 |
* but that's your problem, not mine. |
743 |
*/ |
744 |
static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER; |
745 |
|
746 |
static ssize_t pread (int fd, void *buf, size_t count, off_t offset) |
747 |
{ |
748 |
ssize_t res; |
749 |
off_t ooffset; |
750 |
|
751 |
LOCK (preadwritelock); |
752 |
ooffset = lseek (fd, 0, SEEK_CUR); |
753 |
lseek (fd, offset, SEEK_SET); |
754 |
res = read (fd, buf, count); |
755 |
lseek (fd, ooffset, SEEK_SET); |
756 |
UNLOCK (preadwritelock); |
757 |
|
758 |
return res; |
759 |
} |
760 |
|
761 |
static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset) |
762 |
{ |
763 |
ssize_t res; |
764 |
off_t ooffset; |
765 |
|
766 |
LOCK (preadwritelock); |
767 |
ooffset = lseek (fd, 0, SEEK_CUR); |
768 |
lseek (fd, offset, SEEK_SET); |
769 |
res = write (fd, buf, count); |
770 |
lseek (fd, offset, SEEK_SET); |
771 |
UNLOCK (preadwritelock); |
772 |
|
773 |
return res; |
774 |
} |
775 |
#endif |
776 |
|
777 |
#if !HAVE_FDATASYNC |
778 |
# define fdatasync fsync |
779 |
#endif |
780 |
|
781 |
#if !HAVE_READAHEAD |
782 |
# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self) |
783 |
|
784 |
static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self) |
785 |
{ |
786 |
dBUF; |
787 |
|
788 |
while (count > 0) |
789 |
{ |
790 |
size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE; |
791 |
|
792 |
pread (fd, aio_buf, len, offset); |
793 |
offset += len; |
794 |
count -= len; |
795 |
} |
796 |
|
797 |
errno = 0; |
798 |
} |
799 |
|
800 |
#endif |
801 |
|
802 |
#if !HAVE_READDIR_R |
803 |
# define readdir_r aio_readdir_r |
804 |
|
805 |
static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER; |
806 |
|
807 |
static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res) |
808 |
{ |
809 |
struct dirent *e; |
810 |
int errorno; |
811 |
|
812 |
LOCK (readdirlock); |
813 |
|
814 |
e = readdir (dirp); |
815 |
errorno = errno; |
816 |
|
817 |
if (e) |
818 |
{ |
819 |
*res = ent; |
820 |
strcpy (ent->d_name, e->d_name); |
821 |
} |
822 |
else |
823 |
*res = 0; |
824 |
|
825 |
UNLOCK (readdirlock); |
826 |
|
827 |
errno = errorno; |
828 |
return e ? 0 : -1; |
829 |
} |
830 |
#endif |
831 |
|
832 |
/* sendfile always needs emulation */ |
833 |
static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self) |
834 |
{ |
835 |
ssize_t res; |
836 |
|
837 |
if (!count) |
838 |
return 0; |
839 |
|
840 |
#if HAVE_SENDFILE |
841 |
# if __linux |
842 |
res = sendfile (ofd, ifd, &offset, count); |
843 |
|
844 |
# elif __freebsd |
845 |
/* |
846 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
847 |
* wasted on making it similar to other I/O functions. |
848 |
*/ |
849 |
{ |
850 |
off_t sbytes; |
851 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
852 |
|
853 |
if (res < 0 && sbytes) |
854 |
/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */ |
855 |
res = sbytes; |
856 |
} |
857 |
|
858 |
# elif __hpux |
859 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
860 |
|
861 |
# elif __solaris |
862 |
{ |
863 |
struct sendfilevec vec; |
864 |
size_t sbytes; |
865 |
|
866 |
vec.sfv_fd = ifd; |
867 |
vec.sfv_flag = 0; |
868 |
vec.sfv_off = offset; |
869 |
vec.sfv_len = count; |
870 |
|
871 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
872 |
|
873 |
if (res < 0 && sbytes) |
874 |
res = sbytes; |
875 |
} |
876 |
|
877 |
# endif |
878 |
#else |
879 |
res = -1; |
880 |
errno = ENOSYS; |
881 |
#endif |
882 |
|
883 |
if (res < 0 |
884 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
885 |
#if __solaris |
886 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
887 |
#endif |
888 |
) |
889 |
) |
890 |
{ |
891 |
/* emulate sendfile. this is a major pain in the ass */ |
892 |
dBUF; |
893 |
|
894 |
res = 0; |
895 |
|
896 |
while (count) |
897 |
{ |
898 |
ssize_t cnt; |
899 |
|
900 |
cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset); |
901 |
|
902 |
if (cnt <= 0) |
903 |
{ |
904 |
if (cnt && !res) res = -1; |
905 |
break; |
906 |
} |
907 |
|
908 |
cnt = write (ofd, aio_buf, cnt); |
909 |
|
910 |
if (cnt <= 0) |
911 |
{ |
912 |
if (cnt && !res) res = -1; |
913 |
break; |
914 |
} |
915 |
|
916 |
offset += cnt; |
917 |
res += cnt; |
918 |
count -= cnt; |
919 |
} |
920 |
} |
921 |
|
922 |
return res; |
923 |
} |
924 |
|
925 |
/* read a full directory */ |
926 |
static void scandir_ (aio_req req, worker *self) |
927 |
{ |
928 |
DIR *dirp; |
929 |
union |
930 |
{ |
931 |
struct dirent d; |
932 |
char b [offsetof (struct dirent, d_name) + NAME_MAX + 1]; |
933 |
} *u; |
934 |
struct dirent *entp; |
935 |
char *name, *names; |
936 |
int memlen = 4096; |
937 |
int memofs = 0; |
938 |
int res = 0; |
939 |
int errorno; |
940 |
|
941 |
LOCK (wrklock); |
942 |
self->dirp = dirp = opendir (req->dataptr); |
943 |
self->dbuf = u = malloc (sizeof (*u)); |
944 |
req->data2ptr = names = malloc (memlen); |
945 |
UNLOCK (wrklock); |
946 |
|
947 |
if (dirp && u && names) |
948 |
for (;;) |
949 |
{ |
950 |
errno = 0; |
951 |
readdir_r (dirp, &u->d, &entp); |
952 |
|
953 |
if (!entp) |
954 |
break; |
955 |
|
956 |
name = entp->d_name; |
957 |
|
958 |
if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
959 |
{ |
960 |
int len = strlen (name) + 1; |
961 |
|
962 |
res++; |
963 |
|
964 |
while (memofs + len > memlen) |
965 |
{ |
966 |
memlen *= 2; |
967 |
LOCK (wrklock); |
968 |
req->data2ptr = names = realloc (names, memlen); |
969 |
UNLOCK (wrklock); |
970 |
|
971 |
if (!names) |
972 |
break; |
973 |
} |
974 |
|
975 |
memcpy (names + memofs, name, len); |
976 |
memofs += len; |
977 |
} |
978 |
} |
979 |
|
980 |
if (errno) |
981 |
res = -1; |
982 |
|
983 |
req->result = res; |
984 |
} |
985 |
|
986 |
/*****************************************************************************/ |
987 |
|
988 |
static void *aio_proc (void *thr_arg) |
989 |
{ |
990 |
aio_req req; |
991 |
struct timespec ts; |
992 |
worker *self = (worker *)thr_arg; |
993 |
|
994 |
/* try to distribute timeouts somewhat evenly */ |
995 |
ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL) |
996 |
* (1000000000UL / 1024UL); |
997 |
|
998 |
for (;;) |
999 |
{ |
1000 |
ts.tv_sec = time (0) + IDLE_TIMEOUT; |
1001 |
|
1002 |
LOCK (reqlock); |
1003 |
|
1004 |
for (;;) |
1005 |
{ |
1006 |
self->req = req = reqq_shift (&req_queue); |
1007 |
|
1008 |
if (req) |
1009 |
break; |
1010 |
|
1011 |
++idle; |
1012 |
|
1013 |
if (pthread_cond_timedwait (&reqwait, &reqlock, &ts) |
1014 |
== ETIMEDOUT) |
1015 |
{ |
1016 |
if (idle > max_idle) |
1017 |
{ |
1018 |
--idle; |
1019 |
UNLOCK (reqlock); |
1020 |
LOCK (wrklock); |
1021 |
--started; |
1022 |
UNLOCK (wrklock); |
1023 |
goto quit; |
1024 |
} |
1025 |
|
1026 |
/* we are allowed to idle, so do so without any timeout */ |
1027 |
pthread_cond_wait (&reqwait, &reqlock); |
1028 |
ts.tv_sec = time (0) + IDLE_TIMEOUT; |
1029 |
} |
1030 |
|
1031 |
--idle; |
1032 |
} |
1033 |
|
1034 |
--nready; |
1035 |
|
1036 |
UNLOCK (reqlock); |
1037 |
|
1038 |
errno = 0; /* strictly unnecessary */ |
1039 |
|
1040 |
if (!(req->flags & FLAG_CANCELLED)) |
1041 |
switch (req->type) |
1042 |
{ |
1043 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
1044 |
case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
1045 |
|
1046 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
1047 |
case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break; |
1048 |
|
1049 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
1050 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
1051 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
1052 |
|
1053 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
1054 |
case REQ_CLOSE: req->result = close (req->fd); break; |
1055 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
1056 |
case REQ_RMDIR: req->result = rmdir (req->dataptr); break; |
1057 |
case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break; |
1058 |
case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break; |
1059 |
case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; |
1060 |
case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break; |
1061 |
|
1062 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
1063 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
1064 |
case REQ_READDIR: scandir_ (req, self); break; |
1065 |
|
1066 |
case REQ_BUSY: |
1067 |
{ |
1068 |
struct timeval tv; |
1069 |
|
1070 |
tv.tv_sec = req->fd; |
1071 |
tv.tv_usec = req->fd2; |
1072 |
|
1073 |
req->result = select (0, 0, 0, 0, &tv); |
1074 |
} |
1075 |
|
1076 |
case REQ_GROUP: |
1077 |
case REQ_NOP: |
1078 |
break; |
1079 |
|
1080 |
case REQ_QUIT: |
1081 |
goto quit; |
1082 |
|
1083 |
default: |
1084 |
req->result = ENOSYS; |
1085 |
break; |
1086 |
} |
1087 |
|
1088 |
req->errorno = errno; |
1089 |
|
1090 |
LOCK (reslock); |
1091 |
|
1092 |
++npending; |
1093 |
|
1094 |
if (!reqq_push (&res_queue, req)) |
1095 |
/* write a dummy byte to the pipe so fh becomes ready */ |
1096 |
write (respipe [1], &respipe, 1); |
1097 |
|
1098 |
self->req = 0; |
1099 |
worker_clear (self); |
1100 |
|
1101 |
UNLOCK (reslock); |
1102 |
} |
1103 |
|
1104 |
quit: |
1105 |
LOCK (wrklock); |
1106 |
worker_free (self); |
1107 |
UNLOCK (wrklock); |
1108 |
|
1109 |
return 0; |
1110 |
} |
1111 |
|
1112 |
/*****************************************************************************/ |
1113 |
|
1114 |
static void atfork_prepare (void) |
1115 |
{ |
1116 |
LOCK (wrklock); |
1117 |
LOCK (reqlock); |
1118 |
LOCK (reslock); |
1119 |
#if !HAVE_PREADWRITE |
1120 |
LOCK (preadwritelock); |
1121 |
#endif |
1122 |
#if !HAVE_READDIR_R |
1123 |
LOCK (readdirlock); |
1124 |
#endif |
1125 |
} |
1126 |
|
1127 |
static void atfork_parent (void) |
1128 |
{ |
1129 |
#if !HAVE_READDIR_R |
1130 |
UNLOCK (readdirlock); |
1131 |
#endif |
1132 |
#if !HAVE_PREADWRITE |
1133 |
UNLOCK (preadwritelock); |
1134 |
#endif |
1135 |
UNLOCK (reslock); |
1136 |
UNLOCK (reqlock); |
1137 |
UNLOCK (wrklock); |
1138 |
} |
1139 |
|
1140 |
static void atfork_child (void) |
1141 |
{ |
1142 |
aio_req prv; |
1143 |
|
1144 |
while (prv = reqq_shift (&req_queue)) |
1145 |
req_free (prv); |
1146 |
|
1147 |
while (prv = reqq_shift (&res_queue)) |
1148 |
req_free (prv); |
1149 |
|
1150 |
while (wrk_first.next != &wrk_first) |
1151 |
{ |
1152 |
worker *wrk = wrk_first.next; |
1153 |
|
1154 |
if (wrk->req) |
1155 |
req_free (wrk->req); |
1156 |
|
1157 |
worker_clear (wrk); |
1158 |
worker_free (wrk); |
1159 |
} |
1160 |
|
1161 |
started = 0; |
1162 |
idle = 0; |
1163 |
nreqs = 0; |
1164 |
nready = 0; |
1165 |
npending = 0; |
1166 |
|
1167 |
close (respipe [0]); |
1168 |
close (respipe [1]); |
1169 |
create_pipe (); |
1170 |
|
1171 |
atfork_parent (); |
1172 |
} |
1173 |
|
1174 |
#define dREQ \ |
1175 |
aio_req req; \ |
1176 |
int req_pri = next_pri; \ |
1177 |
next_pri = DEFAULT_PRI + PRI_BIAS; \ |
1178 |
\ |
1179 |
if (SvOK (callback) && !SvROK (callback)) \ |
1180 |
croak ("callback must be undef or of reference type"); \ |
1181 |
\ |
1182 |
Newz (0, req, 1, aio_cb); \ |
1183 |
if (!req) \ |
1184 |
croak ("out of memory during aio_req allocation"); \ |
1185 |
\ |
1186 |
req->callback = newSVsv (callback); \ |
1187 |
req->pri = req_pri |
1188 |
|
1189 |
#define REQ_SEND \ |
1190 |
req_send (req); \ |
1191 |
\ |
1192 |
if (GIMME_V != G_VOID) \ |
1193 |
XPUSHs (req_sv (req, AIO_REQ_KLASS)); |
1194 |
|
1195 |
MODULE = IO::AIO PACKAGE = IO::AIO |
1196 |
|
1197 |
PROTOTYPES: ENABLE |
1198 |
|
1199 |
BOOT: |
1200 |
{ |
1201 |
HV *stash = gv_stashpv ("IO::AIO", 1); |
1202 |
|
1203 |
newCONSTSUB (stash, "EXDEV", newSViv (EXDEV)); |
1204 |
newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY)); |
1205 |
newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY)); |
1206 |
newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT)); |
1207 |
newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC)); |
1208 |
newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO)); |
1209 |
|
1210 |
create_pipe (); |
1211 |
pthread_atfork (atfork_prepare, atfork_parent, atfork_child); |
1212 |
} |
1213 |
|
1214 |
void |
1215 |
min_parallel (int nthreads) |
1216 |
PROTOTYPE: $ |
1217 |
|
1218 |
void |
1219 |
max_parallel (int nthreads) |
1220 |
PROTOTYPE: $ |
1221 |
|
1222 |
int |
1223 |
max_outstanding (int maxreqs) |
1224 |
PROTOTYPE: $ |
1225 |
CODE: |
1226 |
RETVAL = max_outstanding; |
1227 |
max_outstanding = maxreqs; |
1228 |
OUTPUT: |
1229 |
RETVAL |
1230 |
|
1231 |
void |
1232 |
aio_open (pathname,flags,mode,callback=&PL_sv_undef) |
1233 |
SV * pathname |
1234 |
int flags |
1235 |
int mode |
1236 |
SV * callback |
1237 |
PROTOTYPE: $$$;$ |
1238 |
PPCODE: |
1239 |
{ |
1240 |
dREQ; |
1241 |
|
1242 |
req->type = REQ_OPEN; |
1243 |
req->data = newSVsv (pathname); |
1244 |
req->dataptr = SvPVbyte_nolen (req->data); |
1245 |
req->fd = flags; |
1246 |
req->mode = mode; |
1247 |
|
1248 |
REQ_SEND; |
1249 |
} |
1250 |
|
1251 |
void |
1252 |
aio_close (fh,callback=&PL_sv_undef) |
1253 |
SV * fh |
1254 |
SV * callback |
1255 |
PROTOTYPE: $;$ |
1256 |
ALIAS: |
1257 |
aio_close = REQ_CLOSE |
1258 |
aio_fsync = REQ_FSYNC |
1259 |
aio_fdatasync = REQ_FDATASYNC |
1260 |
PPCODE: |
1261 |
{ |
1262 |
dREQ; |
1263 |
|
1264 |
req->type = ix; |
1265 |
req->fh = newSVsv (fh); |
1266 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
1267 |
|
1268 |
REQ_SEND (req); |
1269 |
} |
1270 |
|
1271 |
void |
1272 |
aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
1273 |
SV * fh |
1274 |
UV offset |
1275 |
UV length |
1276 |
SV * data |
1277 |
UV dataoffset |
1278 |
SV * callback |
1279 |
ALIAS: |
1280 |
aio_read = REQ_READ |
1281 |
aio_write = REQ_WRITE |
1282 |
PROTOTYPE: $$$$$;$ |
1283 |
PPCODE: |
1284 |
{ |
1285 |
aio_req req; |
1286 |
STRLEN svlen; |
1287 |
char *svptr = SvPVbyte (data, svlen); |
1288 |
|
1289 |
SvUPGRADE (data, SVt_PV); |
1290 |
SvPOK_on (data); |
1291 |
|
1292 |
if (dataoffset < 0) |
1293 |
dataoffset += svlen; |
1294 |
|
1295 |
if (dataoffset < 0 || dataoffset > svlen) |
1296 |
croak ("data offset outside of string"); |
1297 |
|
1298 |
if (ix == REQ_WRITE) |
1299 |
{ |
1300 |
/* write: check length and adjust. */ |
1301 |
if (length < 0 || length + dataoffset > svlen) |
1302 |
length = svlen - dataoffset; |
1303 |
} |
1304 |
else |
1305 |
{ |
1306 |
/* read: grow scalar as necessary */ |
1307 |
svptr = SvGROW (data, length + dataoffset); |
1308 |
} |
1309 |
|
1310 |
if (length < 0) |
1311 |
croak ("length must not be negative"); |
1312 |
|
1313 |
{ |
1314 |
dREQ; |
1315 |
|
1316 |
req->type = ix; |
1317 |
req->fh = newSVsv (fh); |
1318 |
req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
1319 |
: IoOFP (sv_2io (fh))); |
1320 |
req->offset = offset; |
1321 |
req->length = length; |
1322 |
req->data = SvREFCNT_inc (data); |
1323 |
req->dataptr = (char *)svptr + dataoffset; |
1324 |
|
1325 |
if (!SvREADONLY (data)) |
1326 |
{ |
1327 |
SvREADONLY_on (data); |
1328 |
req->data2ptr = (void *)data; |
1329 |
} |
1330 |
|
1331 |
REQ_SEND; |
1332 |
} |
1333 |
} |
1334 |
|
1335 |
void |
1336 |
aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef) |
1337 |
SV * out_fh |
1338 |
SV * in_fh |
1339 |
UV in_offset |
1340 |
UV length |
1341 |
SV * callback |
1342 |
PROTOTYPE: $$$$;$ |
1343 |
PPCODE: |
1344 |
{ |
1345 |
dREQ; |
1346 |
|
1347 |
req->type = REQ_SENDFILE; |
1348 |
req->fh = newSVsv (out_fh); |
1349 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh))); |
1350 |
req->fh2 = newSVsv (in_fh); |
1351 |
req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh))); |
1352 |
req->offset = in_offset; |
1353 |
req->length = length; |
1354 |
|
1355 |
REQ_SEND; |
1356 |
} |
1357 |
|
1358 |
void |
1359 |
aio_readahead (fh,offset,length,callback=&PL_sv_undef) |
1360 |
SV * fh |
1361 |
UV offset |
1362 |
IV length |
1363 |
SV * callback |
1364 |
PROTOTYPE: $$$;$ |
1365 |
PPCODE: |
1366 |
{ |
1367 |
dREQ; |
1368 |
|
1369 |
req->type = REQ_READAHEAD; |
1370 |
req->fh = newSVsv (fh); |
1371 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
1372 |
req->offset = offset; |
1373 |
req->length = length; |
1374 |
|
1375 |
REQ_SEND; |
1376 |
} |
1377 |
|
1378 |
void |
1379 |
aio_stat (fh_or_path,callback=&PL_sv_undef) |
1380 |
SV * fh_or_path |
1381 |
SV * callback |
1382 |
ALIAS: |
1383 |
aio_stat = REQ_STAT |
1384 |
aio_lstat = REQ_LSTAT |
1385 |
PPCODE: |
1386 |
{ |
1387 |
dREQ; |
1388 |
|
1389 |
New (0, req->statdata, 1, Stat_t); |
1390 |
if (!req->statdata) |
1391 |
{ |
1392 |
req_free (req); |
1393 |
croak ("out of memory during aio_req->statdata allocation"); |
1394 |
} |
1395 |
|
1396 |
if (SvPOK (fh_or_path)) |
1397 |
{ |
1398 |
req->type = ix; |
1399 |
req->data = newSVsv (fh_or_path); |
1400 |
req->dataptr = SvPVbyte_nolen (req->data); |
1401 |
} |
1402 |
else |
1403 |
{ |
1404 |
req->type = REQ_FSTAT; |
1405 |
req->fh = newSVsv (fh_or_path); |
1406 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
1407 |
} |
1408 |
|
1409 |
REQ_SEND; |
1410 |
} |
1411 |
|
1412 |
void |
1413 |
aio_unlink (pathname,callback=&PL_sv_undef) |
1414 |
SV * pathname |
1415 |
SV * callback |
1416 |
ALIAS: |
1417 |
aio_unlink = REQ_UNLINK |
1418 |
aio_rmdir = REQ_RMDIR |
1419 |
aio_readdir = REQ_READDIR |
1420 |
PPCODE: |
1421 |
{ |
1422 |
dREQ; |
1423 |
|
1424 |
req->type = ix; |
1425 |
req->data = newSVsv (pathname); |
1426 |
req->dataptr = SvPVbyte_nolen (req->data); |
1427 |
|
1428 |
REQ_SEND; |
1429 |
} |
1430 |
|
1431 |
void |
1432 |
aio_link (oldpath,newpath,callback=&PL_sv_undef) |
1433 |
SV * oldpath |
1434 |
SV * newpath |
1435 |
SV * callback |
1436 |
ALIAS: |
1437 |
aio_link = REQ_LINK |
1438 |
aio_symlink = REQ_SYMLINK |
1439 |
aio_rename = REQ_RENAME |
1440 |
PPCODE: |
1441 |
{ |
1442 |
dREQ; |
1443 |
|
1444 |
req->type = ix; |
1445 |
req->fh = newSVsv (oldpath); |
1446 |
req->data2ptr = SvPVbyte_nolen (req->fh); |
1447 |
req->data = newSVsv (newpath); |
1448 |
req->dataptr = SvPVbyte_nolen (req->data); |
1449 |
|
1450 |
REQ_SEND; |
1451 |
} |
1452 |
|
1453 |
void |
1454 |
aio_mknod (pathname,mode,dev,callback=&PL_sv_undef) |
1455 |
SV * pathname |
1456 |
SV * callback |
1457 |
UV mode |
1458 |
UV dev |
1459 |
PPCODE: |
1460 |
{ |
1461 |
dREQ; |
1462 |
|
1463 |
req->type = REQ_MKNOD; |
1464 |
req->data = newSVsv (pathname); |
1465 |
req->dataptr = SvPVbyte_nolen (req->data); |
1466 |
req->mode = (mode_t)mode; |
1467 |
req->offset = dev; |
1468 |
|
1469 |
REQ_SEND; |
1470 |
} |
1471 |
|
1472 |
void |
1473 |
aio_busy (delay,callback=&PL_sv_undef) |
1474 |
double delay |
1475 |
SV * callback |
1476 |
PPCODE: |
1477 |
{ |
1478 |
dREQ; |
1479 |
|
1480 |
req->type = REQ_BUSY; |
1481 |
req->fd = delay < 0. ? 0 : delay; |
1482 |
req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd); |
1483 |
|
1484 |
REQ_SEND; |
1485 |
} |
1486 |
|
1487 |
void |
1488 |
aio_group (callback=&PL_sv_undef) |
1489 |
SV * callback |
1490 |
PROTOTYPE: ;$ |
1491 |
PPCODE: |
1492 |
{ |
1493 |
dREQ; |
1494 |
|
1495 |
req->type = REQ_GROUP; |
1496 |
req_send (req); |
1497 |
|
1498 |
XPUSHs (req_sv (req, AIO_GRP_KLASS)); |
1499 |
} |
1500 |
|
1501 |
void |
1502 |
aio_nop (callback=&PL_sv_undef) |
1503 |
SV * callback |
1504 |
PPCODE: |
1505 |
{ |
1506 |
dREQ; |
1507 |
|
1508 |
req->type = REQ_NOP; |
1509 |
|
1510 |
REQ_SEND; |
1511 |
} |
1512 |
|
1513 |
int |
1514 |
aioreq_pri (int pri = 0) |
1515 |
PROTOTYPE: ;$ |
1516 |
CODE: |
1517 |
RETVAL = next_pri - PRI_BIAS; |
1518 |
if (items > 0) |
1519 |
{ |
1520 |
if (pri < PRI_MIN) pri = PRI_MIN; |
1521 |
if (pri > PRI_MAX) pri = PRI_MAX; |
1522 |
next_pri = pri + PRI_BIAS; |
1523 |
} |
1524 |
OUTPUT: |
1525 |
RETVAL |
1526 |
|
1527 |
void |
1528 |
aioreq_nice (int nice = 0) |
1529 |
CODE: |
1530 |
nice = next_pri - nice; |
1531 |
if (nice < PRI_MIN) nice = PRI_MIN; |
1532 |
if (nice > PRI_MAX) nice = PRI_MAX; |
1533 |
next_pri = nice + PRI_BIAS; |
1534 |
|
1535 |
void |
1536 |
flush () |
1537 |
PROTOTYPE: |
1538 |
CODE: |
1539 |
while (nreqs) |
1540 |
{ |
1541 |
poll_wait (); |
1542 |
poll_cb (0); |
1543 |
} |
1544 |
|
1545 |
void |
1546 |
poll() |
1547 |
PROTOTYPE: |
1548 |
CODE: |
1549 |
if (nreqs) |
1550 |
{ |
1551 |
poll_wait (); |
1552 |
poll_cb (0); |
1553 |
} |
1554 |
|
1555 |
int |
1556 |
poll_fileno() |
1557 |
PROTOTYPE: |
1558 |
CODE: |
1559 |
RETVAL = respipe [0]; |
1560 |
OUTPUT: |
1561 |
RETVAL |
1562 |
|
1563 |
int |
1564 |
poll_cb(...) |
1565 |
PROTOTYPE: |
1566 |
CODE: |
1567 |
RETVAL = poll_cb (0); |
1568 |
OUTPUT: |
1569 |
RETVAL |
1570 |
|
1571 |
int |
1572 |
poll_some(int max = 0) |
1573 |
PROTOTYPE: $ |
1574 |
CODE: |
1575 |
RETVAL = poll_cb (max); |
1576 |
OUTPUT: |
1577 |
RETVAL |
1578 |
|
1579 |
void |
1580 |
poll_wait() |
1581 |
PROTOTYPE: |
1582 |
CODE: |
1583 |
if (nreqs) |
1584 |
poll_wait (); |
1585 |
|
1586 |
int |
1587 |
nreqs() |
1588 |
PROTOTYPE: |
1589 |
CODE: |
1590 |
RETVAL = nreqs; |
1591 |
OUTPUT: |
1592 |
RETVAL |
1593 |
|
1594 |
int |
1595 |
nready() |
1596 |
PROTOTYPE: |
1597 |
CODE: |
1598 |
RETVAL = get_nready (); |
1599 |
OUTPUT: |
1600 |
RETVAL |
1601 |
|
1602 |
int |
1603 |
npending() |
1604 |
PROTOTYPE: |
1605 |
CODE: |
1606 |
RETVAL = get_npending (); |
1607 |
OUTPUT: |
1608 |
RETVAL |
1609 |
|
1610 |
PROTOTYPES: DISABLE |
1611 |
|
1612 |
MODULE = IO::AIO PACKAGE = IO::AIO::REQ |
1613 |
|
1614 |
void |
1615 |
cancel (aio_req_ornot req) |
1616 |
CODE: |
1617 |
req_cancel (req); |
1618 |
|
1619 |
void |
1620 |
cb (aio_req_ornot req, SV *callback=&PL_sv_undef) |
1621 |
CODE: |
1622 |
SvREFCNT_dec (req->callback); |
1623 |
req->callback = newSVsv (callback); |
1624 |
|
1625 |
MODULE = IO::AIO PACKAGE = IO::AIO::GRP |
1626 |
|
1627 |
void |
1628 |
add (aio_req grp, ...) |
1629 |
PPCODE: |
1630 |
{ |
1631 |
int i; |
1632 |
aio_req req; |
1633 |
|
1634 |
if (grp->fd == 2) |
1635 |
croak ("cannot add requests to IO::AIO::GRP after the group finished"); |
1636 |
|
1637 |
for (i = 1; i < items; ++i ) |
1638 |
{ |
1639 |
if (GIMME_V != G_VOID) |
1640 |
XPUSHs (sv_2mortal (newSVsv (ST (i)))); |
1641 |
|
1642 |
req = SvAIO_REQ (ST (i)); |
1643 |
|
1644 |
if (req) |
1645 |
{ |
1646 |
++grp->length; |
1647 |
req->grp = grp; |
1648 |
|
1649 |
req->grp_prev = 0; |
1650 |
req->grp_next = grp->grp_first; |
1651 |
|
1652 |
if (grp->grp_first) |
1653 |
grp->grp_first->grp_prev = req; |
1654 |
|
1655 |
grp->grp_first = req; |
1656 |
} |
1657 |
} |
1658 |
} |
1659 |
|
1660 |
void |
1661 |
cancel_subs (aio_req_ornot req) |
1662 |
CODE: |
1663 |
req_cancel_subs (req); |
1664 |
|
1665 |
void |
1666 |
result (aio_req grp, ...) |
1667 |
CODE: |
1668 |
{ |
1669 |
int i; |
1670 |
AV *av; |
1671 |
|
1672 |
grp->errorno = errno; |
1673 |
|
1674 |
av = newAV (); |
1675 |
|
1676 |
for (i = 1; i < items; ++i ) |
1677 |
av_push (av, newSVsv (ST (i))); |
1678 |
|
1679 |
SvREFCNT_dec (grp->data); |
1680 |
grp->data = (SV *)av; |
1681 |
} |
1682 |
|
1683 |
void |
1684 |
errno (aio_req grp, int errorno = errno) |
1685 |
CODE: |
1686 |
grp->errorno = errorno; |
1687 |
|
1688 |
void |
1689 |
limit (aio_req grp, int limit) |
1690 |
CODE: |
1691 |
grp->fd2 = limit; |
1692 |
aio_grp_feed (grp); |
1693 |
|
1694 |
void |
1695 |
feed (aio_req grp, SV *callback=&PL_sv_undef) |
1696 |
CODE: |
1697 |
{ |
1698 |
SvREFCNT_dec (grp->fh2); |
1699 |
grp->fh2 = newSVsv (callback); |
1700 |
|
1701 |
if (grp->fd2 <= 0) |
1702 |
grp->fd2 = 2; |
1703 |
|
1704 |
aio_grp_feed (grp); |
1705 |
} |
1706 |
|