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