1 |
/* solaris */ |
2 |
#define _POSIX_PTHREAD_SEMANTICS 1 |
3 |
|
4 |
#if __linux |
5 |
# define _GNU_SOURCE |
6 |
#endif |
7 |
|
8 |
#define _REENTRANT 1 |
9 |
|
10 |
#include <errno.h> |
11 |
|
12 |
#include "EXTERN.h" |
13 |
#include "perl.h" |
14 |
#include "XSUB.h" |
15 |
|
16 |
#include "autoconf/config.h" |
17 |
|
18 |
#include <pthread.h> |
19 |
|
20 |
#include <stddef.h> |
21 |
#include <errno.h> |
22 |
#include <sys/time.h> |
23 |
#include <sys/select.h> |
24 |
#include <sys/types.h> |
25 |
#include <sys/stat.h> |
26 |
#include <limits.h> |
27 |
#include <unistd.h> |
28 |
#include <fcntl.h> |
29 |
#include <signal.h> |
30 |
#include <sched.h> |
31 |
|
32 |
#if HAVE_SENDFILE |
33 |
# if __linux |
34 |
# include <sys/sendfile.h> |
35 |
# elif __freebsd |
36 |
# include <sys/socket.h> |
37 |
# include <sys/uio.h> |
38 |
# elif __hpux |
39 |
# include <sys/socket.h> |
40 |
# elif __solaris /* not yet */ |
41 |
# include <sys/sendfile.h> |
42 |
# else |
43 |
# error sendfile support requested but not available |
44 |
# endif |
45 |
#endif |
46 |
|
47 |
/* used for struct dirent, AIX doesn't provide it */ |
48 |
#ifndef NAME_MAX |
49 |
# define NAME_MAX 4096 |
50 |
#endif |
51 |
|
52 |
#if __ia64 |
53 |
# define STACKSIZE 65536 |
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 |
|
85 |
#define AIO_REQ_KLASS "IO::AIO::REQ" |
86 |
#define AIO_GRP_KLASS "IO::AIO::GRP" |
87 |
|
88 |
typedef struct aio_cb |
89 |
{ |
90 |
struct aio_cb *volatile next; |
91 |
|
92 |
SV *data, *callback; |
93 |
SV *fh, *fh2; |
94 |
void *dataptr, *data2ptr; |
95 |
Stat_t *statdata; |
96 |
off_t offset; |
97 |
size_t length; |
98 |
ssize_t result; |
99 |
|
100 |
STRLEN dataoffset; |
101 |
int type; |
102 |
int fd, fd2; |
103 |
int errorno; |
104 |
mode_t mode; /* open */ |
105 |
|
106 |
unsigned char flags; |
107 |
unsigned char pri; |
108 |
|
109 |
SV *self; /* the perl counterpart of this request, if any */ |
110 |
struct aio_cb *grp, *grp_prev, *grp_next, *grp_first; |
111 |
} aio_cb; |
112 |
|
113 |
enum { |
114 |
FLAG_CANCELLED = 0x01, |
115 |
}; |
116 |
|
117 |
typedef aio_cb *aio_req; |
118 |
typedef aio_cb *aio_req_ornot; |
119 |
|
120 |
enum { |
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; |
130 |
|
131 |
static int started, wanted; |
132 |
static volatile int nreqs; |
133 |
static int max_outstanding = 1<<30; |
134 |
static int respipe [2]; |
135 |
|
136 |
#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
137 |
# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
138 |
#else |
139 |
# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER |
140 |
#endif |
141 |
|
142 |
#define LOCK(mutex) pthread_mutex_lock (&(mutex)) |
143 |
#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex)) |
144 |
|
145 |
/* worker threasd management */ |
146 |
static pthread_mutex_t wrklock = AIO_MUTEX_INIT; |
147 |
|
148 |
typedef struct worker { |
149 |
/* locked by wrklock */ |
150 |
struct worker *prev, *next; |
151 |
|
152 |
pthread_t tid; |
153 |
|
154 |
/* locked by reslock, reqlock or wrklock */ |
155 |
aio_req req; /* currently processed request */ |
156 |
void *dbuf; |
157 |
DIR *dirp; |
158 |
} worker; |
159 |
|
160 |
static worker wrk_first = { &wrk_first, &wrk_first, 0 }; |
161 |
|
162 |
static void worker_clear (worker *wrk) |
163 |
{ |
164 |
if (wrk->dirp) |
165 |
{ |
166 |
closedir (wrk->dirp); |
167 |
wrk->dirp = 0; |
168 |
} |
169 |
|
170 |
if (wrk->dbuf) |
171 |
{ |
172 |
free (wrk->dbuf); |
173 |
wrk->dbuf = 0; |
174 |
} |
175 |
} |
176 |
|
177 |
static void worker_free (worker *wrk) |
178 |
{ |
179 |
wrk->next->prev = wrk->prev; |
180 |
wrk->prev->next = wrk->next; |
181 |
|
182 |
free (wrk); |
183 |
} |
184 |
|
185 |
static pthread_mutex_t reslock = AIO_MUTEX_INIT; |
186 |
static pthread_mutex_t reqlock = AIO_MUTEX_INIT; |
187 |
static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
188 |
|
189 |
/* |
190 |
* a somewhat faster data structure might be nice, but |
191 |
* with 8 priorities this actually needs <20 insns |
192 |
* per shift, the most expensive operation. |
193 |
*/ |
194 |
typedef struct { |
195 |
aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */ |
196 |
int size; |
197 |
} reqq; |
198 |
|
199 |
static reqq req_queue; |
200 |
static reqq res_queue; |
201 |
|
202 |
int reqq_push (reqq *q, aio_req req) |
203 |
{ |
204 |
int pri = req->pri; |
205 |
req->next = 0; |
206 |
|
207 |
if (q->qe[pri]) |
208 |
{ |
209 |
q->qe[pri]->next = req; |
210 |
q->qe[pri] = req; |
211 |
} |
212 |
else |
213 |
q->qe[pri] = q->qs[pri] = req; |
214 |
|
215 |
return q->size++; |
216 |
} |
217 |
|
218 |
aio_req reqq_shift (reqq *q) |
219 |
{ |
220 |
int pri; |
221 |
|
222 |
if (!q->size) |
223 |
return 0; |
224 |
|
225 |
--q->size; |
226 |
|
227 |
for (pri = NUM_PRI; pri--; ) |
228 |
{ |
229 |
aio_req req = q->qs[pri]; |
230 |
|
231 |
if (req) |
232 |
{ |
233 |
if (!(q->qs[pri] = req->next)) |
234 |
q->qe[pri] = 0; |
235 |
|
236 |
return req; |
237 |
} |
238 |
} |
239 |
|
240 |
abort (); |
241 |
} |
242 |
|
243 |
static void req_invoke (aio_req req); |
244 |
static void req_free (aio_req req); |
245 |
static void req_cancel (aio_req req); |
246 |
|
247 |
/* must be called at most once */ |
248 |
static SV *req_sv (aio_req req, const char *klass) |
249 |
{ |
250 |
if (!req->self) |
251 |
{ |
252 |
req->self = (SV *)newHV (); |
253 |
sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0); |
254 |
} |
255 |
|
256 |
return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1))); |
257 |
} |
258 |
|
259 |
static aio_req SvAIO_REQ (SV *sv) |
260 |
{ |
261 |
MAGIC *mg; |
262 |
|
263 |
if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv)) |
264 |
croak ("object of class " AIO_REQ_KLASS " expected"); |
265 |
|
266 |
mg = mg_find (SvRV (sv), PERL_MAGIC_ext); |
267 |
|
268 |
return mg ? (aio_req)mg->mg_ptr : 0; |
269 |
} |
270 |
|
271 |
static void aio_grp_feed (aio_req grp) |
272 |
{ |
273 |
while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED)) |
274 |
{ |
275 |
int old_len = grp->length; |
276 |
|
277 |
if (grp->fh2 && SvOK (grp->fh2)) |
278 |
{ |
279 |
dSP; |
280 |
|
281 |
ENTER; |
282 |
SAVETMPS; |
283 |
PUSHMARK (SP); |
284 |
XPUSHs (req_sv (grp, AIO_GRP_KLASS)); |
285 |
PUTBACK; |
286 |
call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR); |
287 |
SPAGAIN; |
288 |
FREETMPS; |
289 |
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 |
} |
300 |
} |
301 |
|
302 |
static void aio_grp_dec (aio_req grp) |
303 |
{ |
304 |
--grp->length; |
305 |
|
306 |
/* call feeder, if applicable */ |
307 |
aio_grp_feed (grp); |
308 |
|
309 |
/* finish, if done */ |
310 |
if (!grp->length && grp->fd) |
311 |
{ |
312 |
req_invoke (grp); |
313 |
req_free (grp); |
314 |
} |
315 |
} |
316 |
|
317 |
static void poll_wait () |
318 |
{ |
319 |
fd_set rfd; |
320 |
|
321 |
while (nreqs) |
322 |
{ |
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; |
351 |
SAVETMPS; |
352 |
PUSHMARK (SP); |
353 |
EXTEND (SP, 1); |
354 |
|
355 |
switch (req->type) |
356 |
{ |
357 |
case REQ_READDIR: |
358 |
{ |
359 |
SV *rv = &PL_sv_undef; |
360 |
|
361 |
if (req->result >= 0) |
362 |
{ |
363 |
int i; |
364 |
char *buf = req->data2ptr; |
365 |
AV *av = newAV (); |
366 |
|
367 |
av_extend (av, req->result - 1); |
368 |
|
369 |
for (i = 0; i < req->result; ++i) |
370 |
{ |
371 |
SV *sv = newSVpv (buf, 0); |
372 |
|
373 |
av_store (av, i, sv); |
374 |
buf += SvCUR (sv) + 1; |
375 |
} |
376 |
|
377 |
rv = sv_2mortal (newRV_noinc ((SV *)av)); |
378 |
} |
379 |
|
380 |
PUSHs (rv); |
381 |
} |
382 |
break; |
383 |
|
384 |
case REQ_OPEN: |
385 |
{ |
386 |
/* convert fd to fh */ |
387 |
SV *fh; |
388 |
|
389 |
PUSHs (sv_2mortal (newSViv (req->result))); |
390 |
PUTBACK; |
391 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
392 |
SPAGAIN; |
393 |
|
394 |
fh = SvREFCNT_inc (POPs); |
395 |
|
396 |
PUSHMARK (SP); |
397 |
XPUSHs (sv_2mortal (fh)); |
398 |
} |
399 |
break; |
400 |
|
401 |
case REQ_GROUP: |
402 |
req->fd = 2; /* mark group as finished */ |
403 |
|
404 |
if (req->data) |
405 |
{ |
406 |
int i; |
407 |
AV *av = (AV *)req->data; |
408 |
|
409 |
EXTEND (SP, AvFILL (av) + 1); |
410 |
for (i = 0; i <= AvFILL (av); ++i) |
411 |
PUSHs (*av_fetch (av, i, 0)); |
412 |
} |
413 |
break; |
414 |
|
415 |
case REQ_NOP: |
416 |
case REQ_BUSY: |
417 |
break; |
418 |
|
419 |
default: |
420 |
PUSHs (sv_2mortal (newSViv (req->result))); |
421 |
break; |
422 |
} |
423 |
|
424 |
|
425 |
PUTBACK; |
426 |
call_sv (req->callback, G_VOID | G_EVAL); |
427 |
SPAGAIN; |
428 |
|
429 |
FREETMPS; |
430 |
LEAVE; |
431 |
} |
432 |
|
433 |
if (req->grp) |
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 |
} |
453 |
|
454 |
static void req_free (aio_req req) |
455 |
{ |
456 |
if (req->self) |
457 |
{ |
458 |
sv_unmagic (req->self, PERL_MAGIC_ext); |
459 |
SvREFCNT_dec (req->self); |
460 |
} |
461 |
|
462 |
SvREFCNT_dec (req->data); |
463 |
SvREFCNT_dec (req->fh); |
464 |
SvREFCNT_dec (req->fh2); |
465 |
SvREFCNT_dec (req->callback); |
466 |
Safefree (req->statdata); |
467 |
|
468 |
if (req->type == REQ_READDIR) |
469 |
free (req->data2ptr); |
470 |
|
471 |
Safefree (req); |
472 |
} |
473 |
|
474 |
static void req_cancel_subs (aio_req grp) |
475 |
{ |
476 |
aio_req sub; |
477 |
|
478 |
if (grp->type != REQ_GROUP) |
479 |
return; |
480 |
|
481 |
SvREFCNT_dec (grp->fh2); |
482 |
grp->fh2 = 0; |
483 |
|
484 |
for (sub = grp->grp_first; sub; sub = sub->grp_next) |
485 |
req_cancel (sub); |
486 |
} |
487 |
|
488 |
static void req_cancel (aio_req req) |
489 |
{ |
490 |
req->flags |= FLAG_CANCELLED; |
491 |
|
492 |
req_cancel_subs (req); |
493 |
} |
494 |
|
495 |
static int poll_cb () |
496 |
{ |
497 |
dSP; |
498 |
int count = 0; |
499 |
int do_croak = 0; |
500 |
aio_req req; |
501 |
|
502 |
for (;;) |
503 |
{ |
504 |
LOCK (reslock); |
505 |
req = reqq_shift (&res_queue); |
506 |
|
507 |
if (req) |
508 |
{ |
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 |
} |
554 |
|
555 |
return count; |
556 |
} |
557 |
|
558 |
static void *aio_proc(void *arg); |
559 |
|
560 |
static void start_thread (void) |
561 |
{ |
562 |
sigset_t fullsigset, oldsigset; |
563 |
pthread_attr_t attr; |
564 |
|
565 |
worker *wrk = calloc (1, sizeof (worker)); |
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 |
{ |
581 |
wrk->prev = &wrk_first; |
582 |
wrk->next = wrk_first.next; |
583 |
wrk_first.next->prev = wrk; |
584 |
wrk_first.next = wrk; |
585 |
started++; |
586 |
} |
587 |
else |
588 |
free (wrk); |
589 |
|
590 |
sigprocmask (SIG_SETMASK, &oldsigset, 0); |
591 |
UNLOCK (wrklock); |
592 |
} |
593 |
|
594 |
static void req_send (aio_req req) |
595 |
{ |
596 |
while (started < wanted && nreqs >= started) |
597 |
start_thread (); |
598 |
|
599 |
++nreqs; |
600 |
|
601 |
LOCK (reqlock); |
602 |
reqq_push (&req_queue, req); |
603 |
pthread_cond_signal (&reqwait); |
604 |
UNLOCK (reqlock); |
605 |
|
606 |
if (nreqs > max_outstanding) |
607 |
for (;;) |
608 |
{ |
609 |
poll_cb (); |
610 |
|
611 |
if (nreqs <= max_outstanding) |
612 |
break; |
613 |
|
614 |
poll_wait (); |
615 |
} |
616 |
} |
617 |
|
618 |
static void end_thread (void) |
619 |
{ |
620 |
aio_req req; |
621 |
|
622 |
Newz (0, req, 1, aio_cb); |
623 |
|
624 |
req->type = REQ_QUIT; |
625 |
req->pri = PRI_MAX + PRI_BIAS; |
626 |
|
627 |
req_send (req); |
628 |
} |
629 |
|
630 |
static void min_parallel (int nthreads) |
631 |
{ |
632 |
if (wanted < nthreads) |
633 |
wanted = nthreads; |
634 |
} |
635 |
|
636 |
static void max_parallel (int nthreads) |
637 |
{ |
638 |
int cur = started; |
639 |
|
640 |
if (wanted > nthreads) |
641 |
wanted = nthreads; |
642 |
|
643 |
while (cur > wanted) |
644 |
{ |
645 |
end_thread (); |
646 |
cur--; |
647 |
} |
648 |
|
649 |
while (started > wanted) |
650 |
{ |
651 |
poll_wait (); |
652 |
poll_cb (); |
653 |
} |
654 |
} |
655 |
|
656 |
static void create_pipe () |
657 |
{ |
658 |
if (pipe (respipe)) |
659 |
croak ("unable to initialize result pipe"); |
660 |
|
661 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
662 |
croak ("cannot set result pipe to nonblocking mode"); |
663 |
|
664 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
665 |
croak ("cannot set result pipe to nonblocking mode"); |
666 |
} |
667 |
|
668 |
/*****************************************************************************/ |
669 |
/* work around various missing functions */ |
670 |
|
671 |
#if !HAVE_PREADWRITE |
672 |
# define pread aio_pread |
673 |
# define pwrite aio_pwrite |
674 |
|
675 |
/* |
676 |
* make our pread/pwrite safe against themselves, but not against |
677 |
* normal read/write by using a mutex. slows down execution a lot, |
678 |
* but that's your problem, not mine. |
679 |
*/ |
680 |
static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER; |
681 |
|
682 |
static ssize_t pread (int fd, void *buf, size_t count, off_t offset) |
683 |
{ |
684 |
ssize_t res; |
685 |
off_t ooffset; |
686 |
|
687 |
LOCK (preadwritelock); |
688 |
ooffset = lseek (fd, 0, SEEK_CUR); |
689 |
lseek (fd, offset, SEEK_SET); |
690 |
res = read (fd, buf, count); |
691 |
lseek (fd, ooffset, SEEK_SET); |
692 |
UNLOCK (preadwritelock); |
693 |
|
694 |
return res; |
695 |
} |
696 |
|
697 |
static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset) |
698 |
{ |
699 |
ssize_t res; |
700 |
off_t ooffset; |
701 |
|
702 |
LOCK (preadwritelock); |
703 |
ooffset = lseek (fd, 0, SEEK_CUR); |
704 |
lseek (fd, offset, SEEK_SET); |
705 |
res = write (fd, buf, count); |
706 |
lseek (fd, offset, SEEK_SET); |
707 |
UNLOCK (preadwritelock); |
708 |
|
709 |
return res; |
710 |
} |
711 |
#endif |
712 |
|
713 |
#if !HAVE_FDATASYNC |
714 |
# define fdatasync fsync |
715 |
#endif |
716 |
|
717 |
#if !HAVE_READAHEAD |
718 |
# define readahead aio_readahead |
719 |
|
720 |
static ssize_t readahead (int fd, off_t offset, size_t count) |
721 |
{ |
722 |
dBUF; |
723 |
|
724 |
while (count > 0) |
725 |
{ |
726 |
size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE; |
727 |
|
728 |
pread (fd, aio_buf, len, offset); |
729 |
offset += len; |
730 |
count -= len; |
731 |
} |
732 |
|
733 |
errno = 0; |
734 |
} |
735 |
#endif |
736 |
|
737 |
#if !HAVE_READDIR_R |
738 |
# define readdir_r aio_readdir_r |
739 |
|
740 |
static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER; |
741 |
|
742 |
static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res) |
743 |
{ |
744 |
struct dirent *e; |
745 |
int errorno; |
746 |
|
747 |
LOCK (readdirlock); |
748 |
|
749 |
e = readdir (dirp); |
750 |
errorno = errno; |
751 |
|
752 |
if (e) |
753 |
{ |
754 |
*res = ent; |
755 |
strcpy (ent->d_name, e->d_name); |
756 |
} |
757 |
else |
758 |
*res = 0; |
759 |
|
760 |
UNLOCK (readdirlock); |
761 |
|
762 |
errno = errorno; |
763 |
return e ? 0 : -1; |
764 |
} |
765 |
#endif |
766 |
|
767 |
/* sendfile always needs emulation */ |
768 |
static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self) |
769 |
{ |
770 |
ssize_t res; |
771 |
|
772 |
if (!count) |
773 |
return 0; |
774 |
|
775 |
#if HAVE_SENDFILE |
776 |
# if __linux |
777 |
res = sendfile (ofd, ifd, &offset, count); |
778 |
|
779 |
# elif __freebsd |
780 |
/* |
781 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
782 |
* wasted on making it similar to other I/O functions. |
783 |
*/ |
784 |
{ |
785 |
off_t sbytes; |
786 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
787 |
|
788 |
if (res < 0 && sbytes) |
789 |
/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */ |
790 |
res = sbytes; |
791 |
} |
792 |
|
793 |
# elif __hpux |
794 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
795 |
|
796 |
# elif __solaris |
797 |
{ |
798 |
struct sendfilevec vec; |
799 |
size_t sbytes; |
800 |
|
801 |
vec.sfv_fd = ifd; |
802 |
vec.sfv_flag = 0; |
803 |
vec.sfv_off = offset; |
804 |
vec.sfv_len = count; |
805 |
|
806 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
807 |
|
808 |
if (res < 0 && sbytes) |
809 |
res = sbytes; |
810 |
} |
811 |
|
812 |
# endif |
813 |
#else |
814 |
res = -1; |
815 |
errno = ENOSYS; |
816 |
#endif |
817 |
|
818 |
if (res < 0 |
819 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
820 |
#if __solaris |
821 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
822 |
#endif |
823 |
) |
824 |
) |
825 |
{ |
826 |
/* emulate sendfile. this is a major pain in the ass */ |
827 |
dBUF; |
828 |
|
829 |
res = 0; |
830 |
|
831 |
while (count) |
832 |
{ |
833 |
ssize_t cnt; |
834 |
|
835 |
cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset); |
836 |
|
837 |
if (cnt <= 0) |
838 |
{ |
839 |
if (cnt && !res) res = -1; |
840 |
break; |
841 |
} |
842 |
|
843 |
cnt = write (ofd, aio_buf, cnt); |
844 |
|
845 |
if (cnt <= 0) |
846 |
{ |
847 |
if (cnt && !res) res = -1; |
848 |
break; |
849 |
} |
850 |
|
851 |
offset += cnt; |
852 |
res += cnt; |
853 |
count -= cnt; |
854 |
} |
855 |
} |
856 |
|
857 |
return res; |
858 |
} |
859 |
|
860 |
/* read a full directory */ |
861 |
static void scandir_ (aio_req req, worker *self) |
862 |
{ |
863 |
DIR *dirp; |
864 |
union |
865 |
{ |
866 |
struct dirent d; |
867 |
char b [offsetof (struct dirent, d_name) + NAME_MAX + 1]; |
868 |
} *u; |
869 |
struct dirent *entp; |
870 |
char *name, *names; |
871 |
int memlen = 4096; |
872 |
int memofs = 0; |
873 |
int res = 0; |
874 |
int errorno; |
875 |
|
876 |
LOCK (wrklock); |
877 |
self->dirp = dirp = opendir (req->dataptr); |
878 |
self->dbuf = u = malloc (sizeof (*u)); |
879 |
UNLOCK (wrklock); |
880 |
|
881 |
req->data2ptr = names = malloc (memlen); |
882 |
|
883 |
if (dirp && u && names) |
884 |
for (;;) |
885 |
{ |
886 |
errno = 0; |
887 |
readdir_r (dirp, &u->d, &entp); |
888 |
|
889 |
if (!entp) |
890 |
break; |
891 |
|
892 |
name = entp->d_name; |
893 |
|
894 |
if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
895 |
{ |
896 |
int len = strlen (name) + 1; |
897 |
|
898 |
res++; |
899 |
|
900 |
while (memofs + len > memlen) |
901 |
{ |
902 |
memlen *= 2; |
903 |
LOCK (wrklock); |
904 |
req->data2ptr = names = realloc (names, memlen); |
905 |
UNLOCK (wrklock); |
906 |
|
907 |
if (!names) |
908 |
break; |
909 |
} |
910 |
|
911 |
memcpy (names + memofs, name, len); |
912 |
memofs += len; |
913 |
} |
914 |
} |
915 |
|
916 |
if (errno) |
917 |
res = -1; |
918 |
|
919 |
req->result = res; |
920 |
} |
921 |
|
922 |
/*****************************************************************************/ |
923 |
|
924 |
static void *aio_proc (void *thr_arg) |
925 |
{ |
926 |
aio_req req; |
927 |
int type; |
928 |
worker *self = (worker *)thr_arg; |
929 |
|
930 |
do |
931 |
{ |
932 |
LOCK (reqlock); |
933 |
|
934 |
for (;;) |
935 |
{ |
936 |
self->req = req = reqq_shift (&req_queue); |
937 |
|
938 |
if (req) |
939 |
break; |
940 |
|
941 |
pthread_cond_wait (&reqwait, &reqlock); |
942 |
} |
943 |
|
944 |
UNLOCK (reqlock); |
945 |
|
946 |
errno = 0; /* strictly unnecessary */ |
947 |
type = req->type; /* remember type for QUIT check */ |
948 |
|
949 |
if (!(req->flags & FLAG_CANCELLED)) |
950 |
switch (type) |
951 |
{ |
952 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
953 |
case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
954 |
|
955 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
956 |
case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break; |
957 |
|
958 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
959 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
960 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
961 |
|
962 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
963 |
case REQ_CLOSE: req->result = close (req->fd); break; |
964 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
965 |
case REQ_RMDIR: req->result = rmdir (req->dataptr); break; |
966 |
case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break; |
967 |
case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break; |
968 |
case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; |
969 |
|
970 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
971 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
972 |
case REQ_READDIR: scandir_ (req, self); break; |
973 |
|
974 |
case REQ_BUSY: |
975 |
{ |
976 |
struct timeval tv; |
977 |
|
978 |
tv.tv_sec = req->fd; |
979 |
tv.tv_usec = req->fd2; |
980 |
|
981 |
req->result = select (0, 0, 0, 0, &tv); |
982 |
} |
983 |
|
984 |
case REQ_GROUP: |
985 |
case REQ_NOP: |
986 |
case REQ_QUIT: |
987 |
break; |
988 |
|
989 |
default: |
990 |
req->result = ENOSYS; |
991 |
break; |
992 |
} |
993 |
|
994 |
req->errorno = errno; |
995 |
|
996 |
LOCK (reslock); |
997 |
|
998 |
if (!reqq_push (&res_queue, req)) |
999 |
/* write a dummy byte to the pipe so fh becomes ready */ |
1000 |
write (respipe [1], &respipe, 1); |
1001 |
|
1002 |
self->req = 0; |
1003 |
worker_clear (self); |
1004 |
|
1005 |
UNLOCK (reslock); |
1006 |
} |
1007 |
while (type != REQ_QUIT); |
1008 |
|
1009 |
LOCK (wrklock); |
1010 |
worker_free (self); |
1011 |
UNLOCK (wrklock); |
1012 |
|
1013 |
return 0; |
1014 |
} |
1015 |
|
1016 |
/*****************************************************************************/ |
1017 |
|
1018 |
static void atfork_prepare (void) |
1019 |
{ |
1020 |
LOCK (wrklock); |
1021 |
LOCK (reqlock); |
1022 |
LOCK (reslock); |
1023 |
#if !HAVE_PREADWRITE |
1024 |
LOCK (preadwritelock); |
1025 |
#endif |
1026 |
#if !HAVE_READDIR_R |
1027 |
LOCK (readdirlock); |
1028 |
#endif |
1029 |
} |
1030 |
|
1031 |
static void atfork_parent (void) |
1032 |
{ |
1033 |
#if !HAVE_READDIR_R |
1034 |
UNLOCK (readdirlock); |
1035 |
#endif |
1036 |
#if !HAVE_PREADWRITE |
1037 |
UNLOCK (preadwritelock); |
1038 |
#endif |
1039 |
UNLOCK (reslock); |
1040 |
UNLOCK (reqlock); |
1041 |
UNLOCK (wrklock); |
1042 |
} |
1043 |
|
1044 |
static void atfork_child (void) |
1045 |
{ |
1046 |
aio_req prv; |
1047 |
|
1048 |
while (prv = reqq_shift (&req_queue)) |
1049 |
req_free (prv); |
1050 |
|
1051 |
while (prv = reqq_shift (&res_queue)) |
1052 |
req_free (prv); |
1053 |
|
1054 |
while (wrk_first.next != &wrk_first) |
1055 |
{ |
1056 |
worker *wrk = wrk_first.next; |
1057 |
|
1058 |
if (wrk->req) |
1059 |
req_free (wrk->req); |
1060 |
|
1061 |
worker_clear (wrk); |
1062 |
worker_free (wrk); |
1063 |
} |
1064 |
|
1065 |
started = 0; |
1066 |
nreqs = 0; |
1067 |
|
1068 |
close (respipe [0]); |
1069 |
close (respipe [1]); |
1070 |
create_pipe (); |
1071 |
|
1072 |
atfork_parent (); |
1073 |
} |
1074 |
|
1075 |
#define dREQ \ |
1076 |
aio_req req; \ |
1077 |
int req_pri = next_pri; \ |
1078 |
next_pri = DEFAULT_PRI + PRI_BIAS; \ |
1079 |
\ |
1080 |
if (SvOK (callback) && !SvROK (callback)) \ |
1081 |
croak ("callback must be undef or of reference type"); \ |
1082 |
\ |
1083 |
Newz (0, req, 1, aio_cb); \ |
1084 |
if (!req) \ |
1085 |
croak ("out of memory during aio_req allocation"); \ |
1086 |
\ |
1087 |
req->callback = newSVsv (callback); \ |
1088 |
req->pri = req_pri |
1089 |
|
1090 |
#define REQ_SEND \ |
1091 |
req_send (req); \ |
1092 |
\ |
1093 |
if (GIMME_V != G_VOID) \ |
1094 |
XPUSHs (req_sv (req, AIO_REQ_KLASS)); |
1095 |
|
1096 |
MODULE = IO::AIO PACKAGE = IO::AIO |
1097 |
|
1098 |
PROTOTYPES: ENABLE |
1099 |
|
1100 |
BOOT: |
1101 |
{ |
1102 |
HV *stash = gv_stashpv ("IO::AIO", 1); |
1103 |
newCONSTSUB (stash, "EXDEV", newSViv (EXDEV)); |
1104 |
newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY)); |
1105 |
newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY)); |
1106 |
|
1107 |
create_pipe (); |
1108 |
pthread_atfork (atfork_prepare, atfork_parent, atfork_child); |
1109 |
} |
1110 |
|
1111 |
void |
1112 |
min_parallel (nthreads) |
1113 |
int nthreads |
1114 |
PROTOTYPE: $ |
1115 |
|
1116 |
void |
1117 |
max_parallel (nthreads) |
1118 |
int nthreads |
1119 |
PROTOTYPE: $ |
1120 |
|
1121 |
int |
1122 |
max_outstanding (nreqs) |
1123 |
int nreqs |
1124 |
PROTOTYPE: $ |
1125 |
CODE: |
1126 |
RETVAL = max_outstanding; |
1127 |
max_outstanding = nreqs; |
1128 |
|
1129 |
void |
1130 |
aio_open (pathname,flags,mode,callback=&PL_sv_undef) |
1131 |
SV * pathname |
1132 |
int flags |
1133 |
int mode |
1134 |
SV * callback |
1135 |
PROTOTYPE: $$$;$ |
1136 |
PPCODE: |
1137 |
{ |
1138 |
dREQ; |
1139 |
|
1140 |
req->type = REQ_OPEN; |
1141 |
req->data = newSVsv (pathname); |
1142 |
req->dataptr = SvPVbyte_nolen (req->data); |
1143 |
req->fd = flags; |
1144 |
req->mode = mode; |
1145 |
|
1146 |
REQ_SEND; |
1147 |
} |
1148 |
|
1149 |
void |
1150 |
aio_close (fh,callback=&PL_sv_undef) |
1151 |
SV * fh |
1152 |
SV * callback |
1153 |
PROTOTYPE: $;$ |
1154 |
ALIAS: |
1155 |
aio_close = REQ_CLOSE |
1156 |
aio_fsync = REQ_FSYNC |
1157 |
aio_fdatasync = REQ_FDATASYNC |
1158 |
PPCODE: |
1159 |
{ |
1160 |
dREQ; |
1161 |
|
1162 |
req->type = ix; |
1163 |
req->fh = newSVsv (fh); |
1164 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
1165 |
|
1166 |
REQ_SEND (req); |
1167 |
} |
1168 |
|
1169 |
void |
1170 |
aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
1171 |
SV * fh |
1172 |
UV offset |
1173 |
UV length |
1174 |
SV * data |
1175 |
UV dataoffset |
1176 |
SV * callback |
1177 |
ALIAS: |
1178 |
aio_read = REQ_READ |
1179 |
aio_write = REQ_WRITE |
1180 |
PROTOTYPE: $$$$$;$ |
1181 |
PPCODE: |
1182 |
{ |
1183 |
aio_req req; |
1184 |
STRLEN svlen; |
1185 |
char *svptr = SvPVbyte (data, svlen); |
1186 |
|
1187 |
SvUPGRADE (data, SVt_PV); |
1188 |
SvPOK_on (data); |
1189 |
|
1190 |
if (dataoffset < 0) |
1191 |
dataoffset += svlen; |
1192 |
|
1193 |
if (dataoffset < 0 || dataoffset > svlen) |
1194 |
croak ("data offset outside of string"); |
1195 |
|
1196 |
if (ix == REQ_WRITE) |
1197 |
{ |
1198 |
/* write: check length and adjust. */ |
1199 |
if (length < 0 || length + dataoffset > svlen) |
1200 |
length = svlen - dataoffset; |
1201 |
} |
1202 |
else |
1203 |
{ |
1204 |
/* read: grow scalar as necessary */ |
1205 |
svptr = SvGROW (data, length + dataoffset); |
1206 |
} |
1207 |
|
1208 |
if (length < 0) |
1209 |
croak ("length must not be negative"); |
1210 |
|
1211 |
{ |
1212 |
dREQ; |
1213 |
|
1214 |
req->type = ix; |
1215 |
req->fh = newSVsv (fh); |
1216 |
req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
1217 |
: IoOFP (sv_2io (fh))); |
1218 |
req->offset = offset; |
1219 |
req->length = length; |
1220 |
req->data = SvREFCNT_inc (data); |
1221 |
req->dataptr = (char *)svptr + dataoffset; |
1222 |
|
1223 |
if (!SvREADONLY (data)) |
1224 |
{ |
1225 |
SvREADONLY_on (data); |
1226 |
req->data2ptr = (void *)data; |
1227 |
} |
1228 |
|
1229 |
REQ_SEND; |
1230 |
} |
1231 |
} |
1232 |
|
1233 |
void |
1234 |
aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef) |
1235 |
SV * out_fh |
1236 |
SV * in_fh |
1237 |
UV in_offset |
1238 |
UV length |
1239 |
SV * callback |
1240 |
PROTOTYPE: $$$$;$ |
1241 |
PPCODE: |
1242 |
{ |
1243 |
dREQ; |
1244 |
|
1245 |
req->type = REQ_SENDFILE; |
1246 |
req->fh = newSVsv (out_fh); |
1247 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh))); |
1248 |
req->fh2 = newSVsv (in_fh); |
1249 |
req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh))); |
1250 |
req->offset = in_offset; |
1251 |
req->length = length; |
1252 |
|
1253 |
REQ_SEND; |
1254 |
} |
1255 |
|
1256 |
void |
1257 |
aio_readahead (fh,offset,length,callback=&PL_sv_undef) |
1258 |
SV * fh |
1259 |
UV offset |
1260 |
IV length |
1261 |
SV * callback |
1262 |
PROTOTYPE: $$$;$ |
1263 |
PPCODE: |
1264 |
{ |
1265 |
dREQ; |
1266 |
|
1267 |
req->type = REQ_READAHEAD; |
1268 |
req->fh = newSVsv (fh); |
1269 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
1270 |
req->offset = offset; |
1271 |
req->length = length; |
1272 |
|
1273 |
REQ_SEND; |
1274 |
} |
1275 |
|
1276 |
void |
1277 |
aio_stat (fh_or_path,callback=&PL_sv_undef) |
1278 |
SV * fh_or_path |
1279 |
SV * callback |
1280 |
ALIAS: |
1281 |
aio_stat = REQ_STAT |
1282 |
aio_lstat = REQ_LSTAT |
1283 |
PPCODE: |
1284 |
{ |
1285 |
dREQ; |
1286 |
|
1287 |
New (0, req->statdata, 1, Stat_t); |
1288 |
if (!req->statdata) |
1289 |
{ |
1290 |
req_free (req); |
1291 |
croak ("out of memory during aio_req->statdata allocation"); |
1292 |
} |
1293 |
|
1294 |
if (SvPOK (fh_or_path)) |
1295 |
{ |
1296 |
req->type = ix; |
1297 |
req->data = newSVsv (fh_or_path); |
1298 |
req->dataptr = SvPVbyte_nolen (req->data); |
1299 |
} |
1300 |
else |
1301 |
{ |
1302 |
req->type = REQ_FSTAT; |
1303 |
req->fh = newSVsv (fh_or_path); |
1304 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
1305 |
} |
1306 |
|
1307 |
REQ_SEND; |
1308 |
} |
1309 |
|
1310 |
void |
1311 |
aio_unlink (pathname,callback=&PL_sv_undef) |
1312 |
SV * pathname |
1313 |
SV * callback |
1314 |
ALIAS: |
1315 |
aio_unlink = REQ_UNLINK |
1316 |
aio_rmdir = REQ_RMDIR |
1317 |
aio_readdir = REQ_READDIR |
1318 |
PPCODE: |
1319 |
{ |
1320 |
dREQ; |
1321 |
|
1322 |
req->type = ix; |
1323 |
req->data = newSVsv (pathname); |
1324 |
req->dataptr = SvPVbyte_nolen (req->data); |
1325 |
|
1326 |
REQ_SEND; |
1327 |
} |
1328 |
|
1329 |
void |
1330 |
aio_link (oldpath,newpath,callback=&PL_sv_undef) |
1331 |
SV * oldpath |
1332 |
SV * newpath |
1333 |
SV * callback |
1334 |
ALIAS: |
1335 |
aio_link = REQ_LINK |
1336 |
aio_symlink = REQ_SYMLINK |
1337 |
aio_rename = REQ_RENAME |
1338 |
PPCODE: |
1339 |
{ |
1340 |
dREQ; |
1341 |
|
1342 |
req->type = ix; |
1343 |
req->fh = newSVsv (oldpath); |
1344 |
req->data2ptr = SvPVbyte_nolen (req->fh); |
1345 |
req->data = newSVsv (newpath); |
1346 |
req->dataptr = SvPVbyte_nolen (req->data); |
1347 |
|
1348 |
REQ_SEND; |
1349 |
} |
1350 |
|
1351 |
void |
1352 |
aio_busy (delay,callback=&PL_sv_undef) |
1353 |
double delay |
1354 |
SV * callback |
1355 |
PPCODE: |
1356 |
{ |
1357 |
dREQ; |
1358 |
|
1359 |
req->type = REQ_BUSY; |
1360 |
req->fd = delay < 0. ? 0 : delay; |
1361 |
req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd); |
1362 |
|
1363 |
REQ_SEND; |
1364 |
} |
1365 |
|
1366 |
void |
1367 |
aio_group (callback=&PL_sv_undef) |
1368 |
SV * callback |
1369 |
PROTOTYPE: ;$ |
1370 |
PPCODE: |
1371 |
{ |
1372 |
dREQ; |
1373 |
|
1374 |
req->type = REQ_GROUP; |
1375 |
req_send (req); |
1376 |
|
1377 |
XPUSHs (req_sv (req, AIO_GRP_KLASS)); |
1378 |
} |
1379 |
|
1380 |
void |
1381 |
aio_nop (callback=&PL_sv_undef) |
1382 |
SV * callback |
1383 |
PPCODE: |
1384 |
{ |
1385 |
dREQ; |
1386 |
|
1387 |
req->type = REQ_NOP; |
1388 |
|
1389 |
REQ_SEND; |
1390 |
} |
1391 |
|
1392 |
void |
1393 |
aioreq_pri (int pri = DEFAULT_PRI) |
1394 |
CODE: |
1395 |
if (pri < PRI_MIN) pri = PRI_MIN; |
1396 |
if (pri > PRI_MAX) pri = PRI_MAX; |
1397 |
next_pri = pri + PRI_BIAS; |
1398 |
|
1399 |
void |
1400 |
aioreq_nice (int nice = 0) |
1401 |
CODE: |
1402 |
nice = next_pri - nice; |
1403 |
if (nice < PRI_MIN) nice = PRI_MIN; |
1404 |
if (nice > PRI_MAX) nice = PRI_MAX; |
1405 |
next_pri = nice + PRI_BIAS; |
1406 |
|
1407 |
void |
1408 |
flush () |
1409 |
PROTOTYPE: |
1410 |
CODE: |
1411 |
while (nreqs) |
1412 |
{ |
1413 |
poll_wait (); |
1414 |
poll_cb (); |
1415 |
} |
1416 |
|
1417 |
void |
1418 |
poll() |
1419 |
PROTOTYPE: |
1420 |
CODE: |
1421 |
if (nreqs) |
1422 |
{ |
1423 |
poll_wait (); |
1424 |
poll_cb (); |
1425 |
} |
1426 |
|
1427 |
int |
1428 |
poll_fileno() |
1429 |
PROTOTYPE: |
1430 |
CODE: |
1431 |
RETVAL = respipe [0]; |
1432 |
OUTPUT: |
1433 |
RETVAL |
1434 |
|
1435 |
int |
1436 |
poll_cb(...) |
1437 |
PROTOTYPE: |
1438 |
CODE: |
1439 |
RETVAL = poll_cb (); |
1440 |
OUTPUT: |
1441 |
RETVAL |
1442 |
|
1443 |
void |
1444 |
poll_wait() |
1445 |
PROTOTYPE: |
1446 |
CODE: |
1447 |
if (nreqs) |
1448 |
poll_wait (); |
1449 |
|
1450 |
int |
1451 |
nreqs() |
1452 |
PROTOTYPE: |
1453 |
CODE: |
1454 |
RETVAL = nreqs; |
1455 |
OUTPUT: |
1456 |
RETVAL |
1457 |
|
1458 |
PROTOTYPES: DISABLE |
1459 |
|
1460 |
MODULE = IO::AIO PACKAGE = IO::AIO::REQ |
1461 |
|
1462 |
void |
1463 |
cancel (aio_req_ornot req) |
1464 |
CODE: |
1465 |
req_cancel (req); |
1466 |
|
1467 |
void |
1468 |
cb (aio_req_ornot req, SV *callback=&PL_sv_undef) |
1469 |
CODE: |
1470 |
SvREFCNT_dec (req->callback); |
1471 |
req->callback = newSVsv (callback); |
1472 |
|
1473 |
MODULE = IO::AIO PACKAGE = IO::AIO::GRP |
1474 |
|
1475 |
void |
1476 |
add (aio_req grp, ...) |
1477 |
PPCODE: |
1478 |
{ |
1479 |
int i; |
1480 |
aio_req req; |
1481 |
|
1482 |
if (grp->fd == 2) |
1483 |
croak ("cannot add requests to IO::AIO::GRP after the group finished"); |
1484 |
|
1485 |
for (i = 1; i < items; ++i ) |
1486 |
{ |
1487 |
if (GIMME_V != G_VOID) |
1488 |
XPUSHs (sv_2mortal (newSVsv (ST (i)))); |
1489 |
|
1490 |
req = SvAIO_REQ (ST (i)); |
1491 |
|
1492 |
if (req) |
1493 |
{ |
1494 |
++grp->length; |
1495 |
req->grp = grp; |
1496 |
|
1497 |
req->grp_prev = 0; |
1498 |
req->grp_next = grp->grp_first; |
1499 |
|
1500 |
if (grp->grp_first) |
1501 |
grp->grp_first->grp_prev = req; |
1502 |
|
1503 |
grp->grp_first = req; |
1504 |
} |
1505 |
} |
1506 |
} |
1507 |
|
1508 |
void |
1509 |
cancel_subs (aio_req_ornot req) |
1510 |
CODE: |
1511 |
req_cancel_subs (req); |
1512 |
|
1513 |
void |
1514 |
result (aio_req grp, ...) |
1515 |
CODE: |
1516 |
{ |
1517 |
int i; |
1518 |
AV *av = newAV (); |
1519 |
|
1520 |
for (i = 1; i < items; ++i ) |
1521 |
av_push (av, newSVsv (ST (i))); |
1522 |
|
1523 |
SvREFCNT_dec (grp->data); |
1524 |
grp->data = (SV *)av; |
1525 |
} |
1526 |
|
1527 |
void |
1528 |
limit (aio_req grp, int limit) |
1529 |
CODE: |
1530 |
grp->fd2 = limit; |
1531 |
aio_grp_feed (grp); |
1532 |
|
1533 |
void |
1534 |
feed (aio_req grp, SV *callback=&PL_sv_undef) |
1535 |
CODE: |
1536 |
{ |
1537 |
SvREFCNT_dec (grp->fh2); |
1538 |
grp->fh2 = newSVsv (callback); |
1539 |
|
1540 |
if (grp->fd2 <= 0) |
1541 |
grp->fd2 = 2; |
1542 |
|
1543 |
aio_grp_feed (grp); |
1544 |
} |
1545 |
|