1 |
#include "xthread.h" |
2 |
|
3 |
#include <errno.h> |
4 |
|
5 |
#include "EXTERN.h" |
6 |
#include "perl.h" |
7 |
#include "XSUB.h" |
8 |
|
9 |
#include "autoconf/config.h" |
10 |
|
11 |
#include <stddef.h> |
12 |
#include <stdlib.h> |
13 |
#include <errno.h> |
14 |
#include <sys/time.h> |
15 |
#include <sys/select.h> |
16 |
#include <sys/types.h> |
17 |
#include <sys/stat.h> |
18 |
#include <limits.h> |
19 |
#include <unistd.h> |
20 |
#include <fcntl.h> |
21 |
#include <signal.h> |
22 |
#include <sched.h> |
23 |
#include <utime.h> |
24 |
|
25 |
#if HAVE_SENDFILE |
26 |
# if __linux |
27 |
# include <sys/sendfile.h> |
28 |
# elif __freebsd |
29 |
# include <sys/socket.h> |
30 |
# include <sys/uio.h> |
31 |
# elif __hpux |
32 |
# include <sys/socket.h> |
33 |
# elif __solaris /* not yet */ |
34 |
# include <sys/sendfile.h> |
35 |
# else |
36 |
# error sendfile support requested but not available |
37 |
# endif |
38 |
#endif |
39 |
|
40 |
/* number of seconds after which idle threads exit */ |
41 |
#define IDLE_TIMEOUT 10 |
42 |
|
43 |
/* used for struct dirent, AIX doesn't provide it */ |
44 |
#ifndef NAME_MAX |
45 |
# define NAME_MAX 4096 |
46 |
#endif |
47 |
|
48 |
/* buffer size for various temporary buffers */ |
49 |
#define AIO_BUFSIZE 65536 |
50 |
|
51 |
/* use NV for 32 bit perls as it allows larger offsets */ |
52 |
#if IVSIZE >= 8 |
53 |
# define SvVAL64 SvIV |
54 |
#else |
55 |
# define SvVAL64 SvNV |
56 |
#endif |
57 |
|
58 |
#define dBUF \ |
59 |
char *aio_buf; \ |
60 |
LOCK (wrklock); \ |
61 |
self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \ |
62 |
UNLOCK (wrklock); \ |
63 |
if (!aio_buf) \ |
64 |
return -1; |
65 |
|
66 |
typedef SV SV8; /* byte-sv, used for argument-checking */ |
67 |
|
68 |
enum { |
69 |
REQ_QUIT, |
70 |
REQ_OPEN, REQ_CLOSE, |
71 |
REQ_READ, REQ_WRITE, |
72 |
REQ_READAHEAD, REQ_SENDFILE, |
73 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, |
74 |
REQ_UTIME, REQ_FUTIME, |
75 |
REQ_CHMOD, REQ_FCHMOD, |
76 |
REQ_CHOWN, REQ_FCHOWN, |
77 |
REQ_FSYNC, REQ_FDATASYNC, |
78 |
REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME, |
79 |
REQ_MKNOD, REQ_READDIR, |
80 |
REQ_LINK, REQ_SYMLINK, REQ_READLINK, |
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 *callback; |
93 |
SV *sv1, *sv2; |
94 |
void *ptr1, *ptr2; |
95 |
off_t offs; |
96 |
size_t size; |
97 |
ssize_t result; |
98 |
double nv1, nv2; |
99 |
|
100 |
STRLEN stroffset; |
101 |
int type; |
102 |
int int1, int2, int3; |
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, /* request was cancelled */ |
115 |
FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */ |
116 |
FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */ |
117 |
}; |
118 |
|
119 |
typedef aio_cb *aio_req; |
120 |
typedef aio_cb *aio_req_ornot; |
121 |
|
122 |
enum { |
123 |
PRI_MIN = -4, |
124 |
PRI_MAX = 4, |
125 |
|
126 |
DEFAULT_PRI = 0, |
127 |
PRI_BIAS = -PRI_MIN, |
128 |
NUM_PRI = PRI_MAX + PRI_BIAS + 1, |
129 |
}; |
130 |
|
131 |
#define AIO_TICKS ((1000000 + 1023) >> 10) |
132 |
|
133 |
static unsigned int max_poll_time = 0; |
134 |
static unsigned int max_poll_reqs = 0; |
135 |
|
136 |
/* calculcate time difference in ~1/AIO_TICKS of a second */ |
137 |
static int tvdiff (struct timeval *tv1, struct timeval *tv2) |
138 |
{ |
139 |
return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS |
140 |
+ ((tv2->tv_usec - tv1->tv_usec) >> 10); |
141 |
} |
142 |
|
143 |
static thread_t main_tid; |
144 |
static int main_sig; |
145 |
static int block_sig_level; |
146 |
|
147 |
void block_sig () |
148 |
{ |
149 |
sigset_t ss; |
150 |
|
151 |
if (block_sig_level++) |
152 |
return; |
153 |
|
154 |
if (!main_sig) |
155 |
return; |
156 |
|
157 |
sigemptyset (&ss); |
158 |
sigaddset (&ss, main_sig); |
159 |
pthread_sigmask (SIG_BLOCK, &ss, 0); |
160 |
} |
161 |
|
162 |
void unblock_sig () |
163 |
{ |
164 |
sigset_t ss; |
165 |
|
166 |
if (--block_sig_level) |
167 |
return; |
168 |
|
169 |
if (!main_sig) |
170 |
return; |
171 |
|
172 |
sigemptyset (&ss); |
173 |
sigaddset (&ss, main_sig); |
174 |
pthread_sigmask (SIG_UNBLOCK, &ss, 0); |
175 |
} |
176 |
|
177 |
static int next_pri = DEFAULT_PRI + PRI_BIAS; |
178 |
|
179 |
static unsigned int started, idle, wanted; |
180 |
|
181 |
/* worker threads management */ |
182 |
static mutex_t wrklock = MUTEX_INIT; |
183 |
|
184 |
typedef struct worker { |
185 |
/* locked by wrklock */ |
186 |
struct worker *prev, *next; |
187 |
|
188 |
thread_t tid; |
189 |
|
190 |
/* locked by reslock, reqlock or wrklock */ |
191 |
aio_req req; /* currently processed request */ |
192 |
void *dbuf; |
193 |
DIR *dirp; |
194 |
} worker; |
195 |
|
196 |
static worker wrk_first = { &wrk_first, &wrk_first, 0 }; |
197 |
|
198 |
static void worker_clear (worker *wrk) |
199 |
{ |
200 |
if (wrk->dirp) |
201 |
{ |
202 |
closedir (wrk->dirp); |
203 |
wrk->dirp = 0; |
204 |
} |
205 |
|
206 |
if (wrk->dbuf) |
207 |
{ |
208 |
free (wrk->dbuf); |
209 |
wrk->dbuf = 0; |
210 |
} |
211 |
} |
212 |
|
213 |
static void worker_free (worker *wrk) |
214 |
{ |
215 |
wrk->next->prev = wrk->prev; |
216 |
wrk->prev->next = wrk->next; |
217 |
|
218 |
free (wrk); |
219 |
} |
220 |
|
221 |
static volatile unsigned int nreqs, nready, npending; |
222 |
static volatile unsigned int max_idle = 4; |
223 |
static volatile unsigned int max_outstanding = 0xffffffff; |
224 |
static int respipe [2]; |
225 |
|
226 |
static mutex_t reslock = MUTEX_INIT; |
227 |
static mutex_t reqlock = MUTEX_INIT; |
228 |
static cond_t reqwait = COND_INIT; |
229 |
|
230 |
#if WORDACCESS_UNSAFE |
231 |
|
232 |
static unsigned int get_nready () |
233 |
{ |
234 |
unsigned int retval; |
235 |
|
236 |
LOCK (reqlock); |
237 |
retval = nready; |
238 |
UNLOCK (reqlock); |
239 |
|
240 |
return retval; |
241 |
} |
242 |
|
243 |
static unsigned int get_npending () |
244 |
{ |
245 |
unsigned int retval; |
246 |
|
247 |
LOCK (reslock); |
248 |
retval = npending; |
249 |
UNLOCK (reslock); |
250 |
|
251 |
return retval; |
252 |
} |
253 |
|
254 |
static unsigned int get_nthreads () |
255 |
{ |
256 |
unsigned int retval; |
257 |
|
258 |
LOCK (wrklock); |
259 |
retval = started; |
260 |
UNLOCK (wrklock); |
261 |
|
262 |
return retval; |
263 |
} |
264 |
|
265 |
#else |
266 |
|
267 |
# define get_nready() nready |
268 |
# define get_npending() npending |
269 |
# define get_nthreads() started |
270 |
|
271 |
#endif |
272 |
|
273 |
/* |
274 |
* a somewhat faster data structure might be nice, but |
275 |
* with 8 priorities this actually needs <20 insns |
276 |
* per shift, the most expensive operation. |
277 |
*/ |
278 |
typedef struct { |
279 |
aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */ |
280 |
int size; |
281 |
} reqq; |
282 |
|
283 |
static reqq req_queue; |
284 |
static reqq res_queue; |
285 |
|
286 |
int reqq_push (reqq *q, aio_req req) |
287 |
{ |
288 |
int pri = req->pri; |
289 |
req->next = 0; |
290 |
|
291 |
if (q->qe[pri]) |
292 |
{ |
293 |
q->qe[pri]->next = req; |
294 |
q->qe[pri] = req; |
295 |
} |
296 |
else |
297 |
q->qe[pri] = q->qs[pri] = req; |
298 |
|
299 |
return q->size++; |
300 |
} |
301 |
|
302 |
aio_req reqq_shift (reqq *q) |
303 |
{ |
304 |
int pri; |
305 |
|
306 |
if (!q->size) |
307 |
return 0; |
308 |
|
309 |
--q->size; |
310 |
|
311 |
for (pri = NUM_PRI; pri--; ) |
312 |
{ |
313 |
aio_req req = q->qs[pri]; |
314 |
|
315 |
if (req) |
316 |
{ |
317 |
if (!(q->qs[pri] = req->next)) |
318 |
q->qe[pri] = 0; |
319 |
|
320 |
return req; |
321 |
} |
322 |
} |
323 |
|
324 |
abort (); |
325 |
} |
326 |
|
327 |
static int poll_cb (); |
328 |
static int req_invoke (aio_req req); |
329 |
static void req_destroy (aio_req req); |
330 |
static void req_cancel (aio_req req); |
331 |
|
332 |
/* must be called at most once */ |
333 |
static SV *req_sv (aio_req req, const char *klass) |
334 |
{ |
335 |
if (!req->self) |
336 |
{ |
337 |
req->self = (SV *)newHV (); |
338 |
sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0); |
339 |
} |
340 |
|
341 |
return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1))); |
342 |
} |
343 |
|
344 |
static aio_req SvAIO_REQ (SV *sv) |
345 |
{ |
346 |
MAGIC *mg; |
347 |
|
348 |
if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv)) |
349 |
croak ("object of class " AIO_REQ_KLASS " expected"); |
350 |
|
351 |
mg = mg_find (SvRV (sv), PERL_MAGIC_ext); |
352 |
|
353 |
return mg ? (aio_req)mg->mg_ptr : 0; |
354 |
} |
355 |
|
356 |
static void aio_grp_feed (aio_req grp) |
357 |
{ |
358 |
block_sig (); |
359 |
|
360 |
while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED)) |
361 |
{ |
362 |
int old_len = grp->size; |
363 |
|
364 |
if (grp->sv2 && SvOK (grp->sv2)) |
365 |
{ |
366 |
dSP; |
367 |
|
368 |
ENTER; |
369 |
SAVETMPS; |
370 |
PUSHMARK (SP); |
371 |
XPUSHs (req_sv (grp, AIO_GRP_KLASS)); |
372 |
PUTBACK; |
373 |
call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR); |
374 |
SPAGAIN; |
375 |
FREETMPS; |
376 |
LEAVE; |
377 |
} |
378 |
|
379 |
/* stop if no progress has been made */ |
380 |
if (old_len == grp->size) |
381 |
{ |
382 |
SvREFCNT_dec (grp->sv2); |
383 |
grp->sv2 = 0; |
384 |
break; |
385 |
} |
386 |
} |
387 |
|
388 |
unblock_sig (); |
389 |
} |
390 |
|
391 |
static void aio_grp_dec (aio_req grp) |
392 |
{ |
393 |
--grp->size; |
394 |
|
395 |
/* call feeder, if applicable */ |
396 |
aio_grp_feed (grp); |
397 |
|
398 |
/* finish, if done */ |
399 |
if (!grp->size && grp->int1) |
400 |
{ |
401 |
block_sig (); |
402 |
|
403 |
if (!req_invoke (grp)) |
404 |
{ |
405 |
req_destroy (grp); |
406 |
unblock_sig (); |
407 |
croak (0); |
408 |
} |
409 |
|
410 |
req_destroy (grp); |
411 |
unblock_sig (); |
412 |
} |
413 |
} |
414 |
|
415 |
static int req_invoke (aio_req req) |
416 |
{ |
417 |
dSP; |
418 |
|
419 |
if (req->flags & FLAG_SV2_RO_OFF) |
420 |
SvREADONLY_off (req->sv2); |
421 |
|
422 |
if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback)) |
423 |
{ |
424 |
ENTER; |
425 |
SAVETMPS; |
426 |
PUSHMARK (SP); |
427 |
EXTEND (SP, 1); |
428 |
|
429 |
switch (req->type) |
430 |
{ |
431 |
case REQ_READDIR: |
432 |
{ |
433 |
SV *rv = &PL_sv_undef; |
434 |
|
435 |
if (req->result >= 0) |
436 |
{ |
437 |
int i; |
438 |
char *buf = req->ptr2; |
439 |
AV *av = newAV (); |
440 |
|
441 |
av_extend (av, req->result - 1); |
442 |
|
443 |
for (i = 0; i < req->result; ++i) |
444 |
{ |
445 |
SV *sv = newSVpv (buf, 0); |
446 |
|
447 |
av_store (av, i, sv); |
448 |
buf += SvCUR (sv) + 1; |
449 |
} |
450 |
|
451 |
rv = sv_2mortal (newRV_noinc ((SV *)av)); |
452 |
} |
453 |
|
454 |
PUSHs (rv); |
455 |
} |
456 |
break; |
457 |
|
458 |
case REQ_OPEN: |
459 |
{ |
460 |
/* convert fd to fh */ |
461 |
SV *fh; |
462 |
|
463 |
PUSHs (sv_2mortal (newSViv (req->result))); |
464 |
PUTBACK; |
465 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
466 |
SPAGAIN; |
467 |
|
468 |
fh = POPs; |
469 |
PUSHMARK (SP); |
470 |
XPUSHs (fh); |
471 |
} |
472 |
break; |
473 |
|
474 |
case REQ_GROUP: |
475 |
req->int1 = 2; /* mark group as finished */ |
476 |
|
477 |
if (req->sv1) |
478 |
{ |
479 |
int i; |
480 |
AV *av = (AV *)req->sv1; |
481 |
|
482 |
EXTEND (SP, AvFILL (av) + 1); |
483 |
for (i = 0; i <= AvFILL (av); ++i) |
484 |
PUSHs (*av_fetch (av, i, 0)); |
485 |
} |
486 |
break; |
487 |
|
488 |
case REQ_NOP: |
489 |
case REQ_BUSY: |
490 |
break; |
491 |
|
492 |
case REQ_READLINK: |
493 |
if (req->result > 0) |
494 |
{ |
495 |
SvCUR_set (req->sv2, req->result); |
496 |
*SvEND (req->sv2) = 0; |
497 |
PUSHs (req->sv2); |
498 |
} |
499 |
break; |
500 |
|
501 |
case REQ_STAT: |
502 |
case REQ_LSTAT: |
503 |
case REQ_FSTAT: |
504 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
505 |
PL_laststatval = req->result; |
506 |
PL_statcache = *(Stat_t *)(req->ptr2); |
507 |
PUSHs (sv_2mortal (newSViv (req->result))); |
508 |
break; |
509 |
|
510 |
case REQ_READ: |
511 |
SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0)); |
512 |
*SvEND (req->sv2) = 0; |
513 |
PUSHs (sv_2mortal (newSViv (req->result))); |
514 |
break; |
515 |
|
516 |
default: |
517 |
PUSHs (sv_2mortal (newSViv (req->result))); |
518 |
break; |
519 |
} |
520 |
|
521 |
errno = req->errorno; |
522 |
|
523 |
PUTBACK; |
524 |
call_sv (req->callback, G_VOID | G_EVAL); |
525 |
SPAGAIN; |
526 |
|
527 |
FREETMPS; |
528 |
LEAVE; |
529 |
} |
530 |
|
531 |
if (req->grp) |
532 |
{ |
533 |
aio_req grp = req->grp; |
534 |
|
535 |
/* unlink request */ |
536 |
if (req->grp_next) req->grp_next->grp_prev = req->grp_prev; |
537 |
if (req->grp_prev) req->grp_prev->grp_next = req->grp_next; |
538 |
|
539 |
if (grp->grp_first == req) |
540 |
grp->grp_first = req->grp_next; |
541 |
|
542 |
aio_grp_dec (grp); |
543 |
} |
544 |
|
545 |
return !SvTRUE (ERRSV); |
546 |
} |
547 |
|
548 |
static void req_destroy (aio_req req) |
549 |
{ |
550 |
if (req->self) |
551 |
{ |
552 |
sv_unmagic (req->self, PERL_MAGIC_ext); |
553 |
SvREFCNT_dec (req->self); |
554 |
} |
555 |
|
556 |
SvREFCNT_dec (req->sv1); |
557 |
SvREFCNT_dec (req->sv2); |
558 |
SvREFCNT_dec (req->callback); |
559 |
|
560 |
if (req->flags & FLAG_PTR2_FREE) |
561 |
free (req->ptr2); |
562 |
|
563 |
Safefree (req); |
564 |
} |
565 |
|
566 |
static void req_cancel_subs (aio_req grp) |
567 |
{ |
568 |
aio_req sub; |
569 |
|
570 |
if (grp->type != REQ_GROUP) |
571 |
return; |
572 |
|
573 |
SvREFCNT_dec (grp->sv2); |
574 |
grp->sv2 = 0; |
575 |
|
576 |
for (sub = grp->grp_first; sub; sub = sub->grp_next) |
577 |
req_cancel (sub); |
578 |
} |
579 |
|
580 |
static void req_cancel (aio_req req) |
581 |
{ |
582 |
req->flags |= FLAG_CANCELLED; |
583 |
|
584 |
req_cancel_subs (req); |
585 |
} |
586 |
|
587 |
static void *aio_proc (void *arg); |
588 |
|
589 |
static void start_thread (void) |
590 |
{ |
591 |
worker *wrk = calloc (1, sizeof (worker)); |
592 |
|
593 |
if (!wrk) |
594 |
croak ("unable to allocate worker thread data"); |
595 |
|
596 |
LOCK (wrklock); |
597 |
|
598 |
if (thread_create (&wrk->tid, aio_proc, (void *)wrk)) |
599 |
{ |
600 |
wrk->prev = &wrk_first; |
601 |
wrk->next = wrk_first.next; |
602 |
wrk_first.next->prev = wrk; |
603 |
wrk_first.next = wrk; |
604 |
++started; |
605 |
} |
606 |
else |
607 |
free (wrk); |
608 |
|
609 |
UNLOCK (wrklock); |
610 |
} |
611 |
|
612 |
static void maybe_start_thread () |
613 |
{ |
614 |
if (get_nthreads () >= wanted) |
615 |
return; |
616 |
|
617 |
/* todo: maybe use idle here, but might be less exact */ |
618 |
if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs) |
619 |
return; |
620 |
|
621 |
start_thread (); |
622 |
} |
623 |
|
624 |
static void req_send (aio_req req) |
625 |
{ |
626 |
block_sig (); |
627 |
|
628 |
++nreqs; |
629 |
|
630 |
LOCK (reqlock); |
631 |
++nready; |
632 |
reqq_push (&req_queue, req); |
633 |
COND_SIGNAL (reqwait); |
634 |
UNLOCK (reqlock); |
635 |
|
636 |
unblock_sig (); |
637 |
|
638 |
maybe_start_thread (); |
639 |
} |
640 |
|
641 |
static void end_thread (void) |
642 |
{ |
643 |
aio_req req; |
644 |
|
645 |
Newz (0, req, 1, aio_cb); |
646 |
|
647 |
req->type = REQ_QUIT; |
648 |
req->pri = PRI_MAX + PRI_BIAS; |
649 |
|
650 |
LOCK (reqlock); |
651 |
reqq_push (&req_queue, req); |
652 |
COND_SIGNAL (reqwait); |
653 |
UNLOCK (reqlock); |
654 |
|
655 |
LOCK (wrklock); |
656 |
--started; |
657 |
UNLOCK (wrklock); |
658 |
} |
659 |
|
660 |
static void set_max_idle (int nthreads) |
661 |
{ |
662 |
if (WORDACCESS_UNSAFE) LOCK (reqlock); |
663 |
max_idle = nthreads <= 0 ? 1 : nthreads; |
664 |
if (WORDACCESS_UNSAFE) UNLOCK (reqlock); |
665 |
} |
666 |
|
667 |
static void min_parallel (int nthreads) |
668 |
{ |
669 |
if (wanted < nthreads) |
670 |
wanted = nthreads; |
671 |
} |
672 |
|
673 |
static void max_parallel (int nthreads) |
674 |
{ |
675 |
if (wanted > nthreads) |
676 |
wanted = nthreads; |
677 |
|
678 |
while (started > wanted) |
679 |
end_thread (); |
680 |
} |
681 |
|
682 |
static void poll_wait () |
683 |
{ |
684 |
fd_set rfd; |
685 |
|
686 |
while (nreqs) |
687 |
{ |
688 |
int size; |
689 |
if (WORDACCESS_UNSAFE) LOCK (reslock); |
690 |
size = res_queue.size; |
691 |
if (WORDACCESS_UNSAFE) UNLOCK (reslock); |
692 |
|
693 |
if (size) |
694 |
return; |
695 |
|
696 |
maybe_start_thread (); |
697 |
|
698 |
FD_ZERO(&rfd); |
699 |
FD_SET(respipe [0], &rfd); |
700 |
|
701 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
702 |
} |
703 |
} |
704 |
|
705 |
static int poll_cb () |
706 |
{ |
707 |
dSP; |
708 |
int count = 0; |
709 |
int maxreqs = max_poll_reqs; |
710 |
int do_croak = 0; |
711 |
struct timeval tv_start, tv_now; |
712 |
aio_req req; |
713 |
|
714 |
if (max_poll_time) |
715 |
gettimeofday (&tv_start, 0); |
716 |
|
717 |
block_sig (); |
718 |
|
719 |
for (;;) |
720 |
{ |
721 |
for (;;) |
722 |
{ |
723 |
maybe_start_thread (); |
724 |
|
725 |
LOCK (reslock); |
726 |
req = reqq_shift (&res_queue); |
727 |
|
728 |
if (req) |
729 |
{ |
730 |
--npending; |
731 |
|
732 |
if (!res_queue.size) |
733 |
{ |
734 |
/* read any signals sent by the worker threads */ |
735 |
char buf [4]; |
736 |
while (read (respipe [0], buf, 4) == 4) |
737 |
; |
738 |
} |
739 |
} |
740 |
|
741 |
UNLOCK (reslock); |
742 |
|
743 |
if (!req) |
744 |
break; |
745 |
|
746 |
--nreqs; |
747 |
|
748 |
if (req->type == REQ_GROUP && req->size) |
749 |
{ |
750 |
req->int1 = 1; /* mark request as delayed */ |
751 |
continue; |
752 |
} |
753 |
else |
754 |
{ |
755 |
if (!req_invoke (req)) |
756 |
{ |
757 |
req_destroy (req); |
758 |
unblock_sig (); |
759 |
croak (0); |
760 |
} |
761 |
|
762 |
count++; |
763 |
} |
764 |
|
765 |
req_destroy (req); |
766 |
|
767 |
if (maxreqs && !--maxreqs) |
768 |
break; |
769 |
|
770 |
if (max_poll_time) |
771 |
{ |
772 |
gettimeofday (&tv_now, 0); |
773 |
|
774 |
if (tvdiff (&tv_start, &tv_now) >= max_poll_time) |
775 |
break; |
776 |
} |
777 |
} |
778 |
|
779 |
if (nreqs <= max_outstanding) |
780 |
break; |
781 |
|
782 |
poll_wait (); |
783 |
|
784 |
++maxreqs; |
785 |
} |
786 |
|
787 |
unblock_sig (); |
788 |
return count; |
789 |
} |
790 |
|
791 |
static void create_pipe () |
792 |
{ |
793 |
if (pipe (respipe)) |
794 |
croak ("unable to initialize result pipe"); |
795 |
|
796 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
797 |
croak ("cannot set result pipe to nonblocking mode"); |
798 |
|
799 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
800 |
croak ("cannot set result pipe to nonblocking mode"); |
801 |
} |
802 |
|
803 |
/*****************************************************************************/ |
804 |
/* work around various missing functions */ |
805 |
|
806 |
#if !HAVE_PREADWRITE |
807 |
# define pread aio_pread |
808 |
# define pwrite aio_pwrite |
809 |
|
810 |
/* |
811 |
* make our pread/pwrite safe against themselves, but not against |
812 |
* normal read/write by using a mutex. slows down execution a lot, |
813 |
* but that's your problem, not mine. |
814 |
*/ |
815 |
static mutex_t preadwritelock = MUTEX_INIT; |
816 |
|
817 |
static ssize_t pread (int fd, void *buf, size_t count, off_t offset) |
818 |
{ |
819 |
ssize_t res; |
820 |
off_t ooffset; |
821 |
|
822 |
LOCK (preadwritelock); |
823 |
ooffset = lseek (fd, 0, SEEK_CUR); |
824 |
lseek (fd, offset, SEEK_SET); |
825 |
res = read (fd, buf, count); |
826 |
lseek (fd, ooffset, SEEK_SET); |
827 |
UNLOCK (preadwritelock); |
828 |
|
829 |
return res; |
830 |
} |
831 |
|
832 |
static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset) |
833 |
{ |
834 |
ssize_t res; |
835 |
off_t ooffset; |
836 |
|
837 |
LOCK (preadwritelock); |
838 |
ooffset = lseek (fd, 0, SEEK_CUR); |
839 |
lseek (fd, offset, SEEK_SET); |
840 |
res = write (fd, buf, count); |
841 |
lseek (fd, offset, SEEK_SET); |
842 |
UNLOCK (preadwritelock); |
843 |
|
844 |
return res; |
845 |
} |
846 |
#endif |
847 |
|
848 |
#ifndef HAVE_FUTIMES |
849 |
|
850 |
# define utimes(path,times) aio_utimes (path, times) |
851 |
# define futimes(fd,times) aio_futimes (fd, times) |
852 |
|
853 |
int aio_utimes (const char *filename, const struct timeval times[2]) |
854 |
{ |
855 |
if (times) |
856 |
{ |
857 |
struct utimbuf buf; |
858 |
|
859 |
buf.actime = times[0].tv_sec; |
860 |
buf.modtime = times[1].tv_sec; |
861 |
|
862 |
return utime (filename, &buf); |
863 |
} |
864 |
else |
865 |
return utime (filename, 0); |
866 |
} |
867 |
|
868 |
int aio_futimes (int fd, const struct timeval tv[2]) |
869 |
{ |
870 |
errno = ENOSYS; |
871 |
return -1; |
872 |
} |
873 |
|
874 |
#endif |
875 |
|
876 |
#if !HAVE_FDATASYNC |
877 |
# define fdatasync fsync |
878 |
#endif |
879 |
|
880 |
#if !HAVE_READAHEAD |
881 |
# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self) |
882 |
|
883 |
static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self) |
884 |
{ |
885 |
dBUF; |
886 |
|
887 |
while (count > 0) |
888 |
{ |
889 |
size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE; |
890 |
|
891 |
pread (fd, aio_buf, len, offset); |
892 |
offset += len; |
893 |
count -= len; |
894 |
} |
895 |
|
896 |
errno = 0; |
897 |
} |
898 |
|
899 |
#endif |
900 |
|
901 |
#if !HAVE_READDIR_R |
902 |
# define readdir_r aio_readdir_r |
903 |
|
904 |
static mutex_t readdirlock = MUTEX_INIT; |
905 |
|
906 |
static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res) |
907 |
{ |
908 |
struct dirent *e; |
909 |
int errorno; |
910 |
|
911 |
LOCK (readdirlock); |
912 |
|
913 |
e = readdir (dirp); |
914 |
errorno = errno; |
915 |
|
916 |
if (e) |
917 |
{ |
918 |
*res = ent; |
919 |
strcpy (ent->d_name, e->d_name); |
920 |
} |
921 |
else |
922 |
*res = 0; |
923 |
|
924 |
UNLOCK (readdirlock); |
925 |
|
926 |
errno = errorno; |
927 |
return e ? 0 : -1; |
928 |
} |
929 |
#endif |
930 |
|
931 |
/* sendfile always needs emulation */ |
932 |
static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self) |
933 |
{ |
934 |
ssize_t res; |
935 |
|
936 |
if (!count) |
937 |
return 0; |
938 |
|
939 |
#if HAVE_SENDFILE |
940 |
# if __linux |
941 |
res = sendfile (ofd, ifd, &offset, count); |
942 |
|
943 |
# elif __freebsd |
944 |
/* |
945 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
946 |
* wasted on making it similar to other I/O functions. |
947 |
*/ |
948 |
{ |
949 |
off_t sbytes; |
950 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
951 |
|
952 |
if (res < 0 && sbytes) |
953 |
/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */ |
954 |
res = sbytes; |
955 |
} |
956 |
|
957 |
# elif __hpux |
958 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
959 |
|
960 |
# elif __solaris |
961 |
{ |
962 |
struct sendfilevec vec; |
963 |
size_t sbytes; |
964 |
|
965 |
vec.sfv_fd = ifd; |
966 |
vec.sfv_flag = 0; |
967 |
vec.sfv_off = offset; |
968 |
vec.sfv_len = count; |
969 |
|
970 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
971 |
|
972 |
if (res < 0 && sbytes) |
973 |
res = sbytes; |
974 |
} |
975 |
|
976 |
# endif |
977 |
#else |
978 |
res = -1; |
979 |
errno = ENOSYS; |
980 |
#endif |
981 |
|
982 |
if (res < 0 |
983 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
984 |
#if __solaris |
985 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
986 |
#endif |
987 |
) |
988 |
) |
989 |
{ |
990 |
/* emulate sendfile. this is a major pain in the ass */ |
991 |
dBUF; |
992 |
|
993 |
res = 0; |
994 |
|
995 |
while (count) |
996 |
{ |
997 |
ssize_t cnt; |
998 |
|
999 |
cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset); |
1000 |
|
1001 |
if (cnt <= 0) |
1002 |
{ |
1003 |
if (cnt && !res) res = -1; |
1004 |
break; |
1005 |
} |
1006 |
|
1007 |
cnt = write (ofd, aio_buf, cnt); |
1008 |
|
1009 |
if (cnt <= 0) |
1010 |
{ |
1011 |
if (cnt && !res) res = -1; |
1012 |
break; |
1013 |
} |
1014 |
|
1015 |
offset += cnt; |
1016 |
res += cnt; |
1017 |
count -= cnt; |
1018 |
} |
1019 |
} |
1020 |
|
1021 |
return res; |
1022 |
} |
1023 |
|
1024 |
/* read a full directory */ |
1025 |
static void scandir_ (aio_req req, worker *self) |
1026 |
{ |
1027 |
DIR *dirp; |
1028 |
union |
1029 |
{ |
1030 |
struct dirent d; |
1031 |
char b [offsetof (struct dirent, d_name) + NAME_MAX + 1]; |
1032 |
} *u; |
1033 |
struct dirent *entp; |
1034 |
char *name, *names; |
1035 |
int memlen = 4096; |
1036 |
int memofs = 0; |
1037 |
int res = 0; |
1038 |
int errorno; |
1039 |
|
1040 |
LOCK (wrklock); |
1041 |
self->dirp = dirp = opendir (req->ptr1); |
1042 |
self->dbuf = u = malloc (sizeof (*u)); |
1043 |
req->flags |= FLAG_PTR2_FREE; |
1044 |
req->ptr2 = names = malloc (memlen); |
1045 |
UNLOCK (wrklock); |
1046 |
|
1047 |
if (dirp && u && names) |
1048 |
for (;;) |
1049 |
{ |
1050 |
errno = 0; |
1051 |
readdir_r (dirp, &u->d, &entp); |
1052 |
|
1053 |
if (!entp) |
1054 |
break; |
1055 |
|
1056 |
name = entp->d_name; |
1057 |
|
1058 |
if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
1059 |
{ |
1060 |
int len = strlen (name) + 1; |
1061 |
|
1062 |
res++; |
1063 |
|
1064 |
while (memofs + len > memlen) |
1065 |
{ |
1066 |
memlen *= 2; |
1067 |
LOCK (wrklock); |
1068 |
req->ptr2 = names = realloc (names, memlen); |
1069 |
UNLOCK (wrklock); |
1070 |
|
1071 |
if (!names) |
1072 |
break; |
1073 |
} |
1074 |
|
1075 |
memcpy (names + memofs, name, len); |
1076 |
memofs += len; |
1077 |
} |
1078 |
} |
1079 |
|
1080 |
if (errno) |
1081 |
res = -1; |
1082 |
|
1083 |
req->result = res; |
1084 |
} |
1085 |
|
1086 |
/*****************************************************************************/ |
1087 |
|
1088 |
static void *aio_proc (void *thr_arg) |
1089 |
{ |
1090 |
aio_req req; |
1091 |
struct timespec ts; |
1092 |
worker *self = (worker *)thr_arg; |
1093 |
|
1094 |
/* try to distribute timeouts somewhat evenly */ |
1095 |
ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL) |
1096 |
* (1000000000UL / 1024UL); |
1097 |
|
1098 |
for (;;) |
1099 |
{ |
1100 |
ts.tv_sec = time (0) + IDLE_TIMEOUT; |
1101 |
|
1102 |
LOCK (reqlock); |
1103 |
|
1104 |
for (;;) |
1105 |
{ |
1106 |
self->req = req = reqq_shift (&req_queue); |
1107 |
|
1108 |
if (req) |
1109 |
break; |
1110 |
|
1111 |
++idle; |
1112 |
|
1113 |
if (COND_TIMEDWAIT (reqwait, reqlock, ts) |
1114 |
== ETIMEDOUT) |
1115 |
{ |
1116 |
if (idle > max_idle) |
1117 |
{ |
1118 |
--idle; |
1119 |
UNLOCK (reqlock); |
1120 |
LOCK (wrklock); |
1121 |
--started; |
1122 |
UNLOCK (wrklock); |
1123 |
goto quit; |
1124 |
} |
1125 |
|
1126 |
/* we are allowed to idle, so do so without any timeout */ |
1127 |
COND_WAIT (reqwait, reqlock); |
1128 |
ts.tv_sec = time (0) + IDLE_TIMEOUT; |
1129 |
} |
1130 |
|
1131 |
--idle; |
1132 |
} |
1133 |
|
1134 |
--nready; |
1135 |
|
1136 |
UNLOCK (reqlock); |
1137 |
|
1138 |
errno = 0; /* strictly unnecessary */ |
1139 |
|
1140 |
if (!(req->flags & FLAG_CANCELLED)) |
1141 |
switch (req->type) |
1142 |
{ |
1143 |
case REQ_READ: req->result = req->offs >= 0 |
1144 |
? pread (req->int1, req->ptr1, req->size, req->offs) |
1145 |
: read (req->int1, req->ptr1, req->size); break; |
1146 |
case REQ_WRITE: req->result = req->offs >= 0 |
1147 |
? pwrite (req->int1, req->ptr1, req->size, req->offs) |
1148 |
: write (req->int1, req->ptr1, req->size); break; |
1149 |
|
1150 |
case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break; |
1151 |
case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break; |
1152 |
|
1153 |
case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break; |
1154 |
case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break; |
1155 |
case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break; |
1156 |
|
1157 |
case REQ_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break; |
1158 |
case REQ_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break; |
1159 |
case REQ_CHMOD: req->result = chmod (req->ptr1, req->mode); break; |
1160 |
case REQ_FCHMOD: req->result = fchmod (req->int1, req->mode); break; |
1161 |
|
1162 |
case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break; |
1163 |
case REQ_CLOSE: req->result = close (req->int1); break; |
1164 |
case REQ_UNLINK: req->result = unlink (req->ptr1); break; |
1165 |
case REQ_RMDIR: req->result = rmdir (req->ptr1); break; |
1166 |
case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break; |
1167 |
case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break; |
1168 |
case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break; |
1169 |
case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break; |
1170 |
case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break; |
1171 |
case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break; |
1172 |
|
1173 |
case REQ_FDATASYNC: req->result = fdatasync (req->int1); break; |
1174 |
case REQ_FSYNC: req->result = fsync (req->int1); break; |
1175 |
case REQ_READDIR: scandir_ (req, self); break; |
1176 |
|
1177 |
case REQ_BUSY: |
1178 |
{ |
1179 |
struct timeval tv; |
1180 |
|
1181 |
tv.tv_sec = req->nv1; |
1182 |
tv.tv_usec = (req->nv1 - tv.tv_usec) * 1000000.; |
1183 |
|
1184 |
req->result = select (0, 0, 0, 0, &tv); |
1185 |
} |
1186 |
|
1187 |
case REQ_UTIME: |
1188 |
case REQ_FUTIME: |
1189 |
{ |
1190 |
struct timeval tv[2]; |
1191 |
struct timeval *times; |
1192 |
|
1193 |
if (req->nv1 != -1. || req->nv2 != -1.) |
1194 |
{ |
1195 |
tv[0].tv_sec = req->nv1; |
1196 |
tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.; |
1197 |
tv[1].tv_sec = req->nv2; |
1198 |
tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.; |
1199 |
|
1200 |
times = tv; |
1201 |
} |
1202 |
else |
1203 |
times = 0; |
1204 |
|
1205 |
|
1206 |
req->result = req->type == REQ_FUTIME |
1207 |
? futimes (req->int1, times) |
1208 |
: utimes (req->ptr1, times); |
1209 |
} |
1210 |
|
1211 |
case REQ_GROUP: |
1212 |
case REQ_NOP: |
1213 |
break; |
1214 |
|
1215 |
case REQ_QUIT: |
1216 |
goto quit; |
1217 |
|
1218 |
default: |
1219 |
req->result = -1; |
1220 |
break; |
1221 |
} |
1222 |
|
1223 |
req->errorno = errno; |
1224 |
|
1225 |
LOCK (reslock); |
1226 |
|
1227 |
++npending; |
1228 |
|
1229 |
if (!reqq_push (&res_queue, req)) |
1230 |
{ |
1231 |
/* write a dummy byte to the pipe so fh becomes ready */ |
1232 |
write (respipe [1], &respipe, 1); |
1233 |
|
1234 |
/* optionally signal the main thread asynchronously */ |
1235 |
if (main_sig) |
1236 |
pthread_kill (main_tid, main_sig); |
1237 |
} |
1238 |
|
1239 |
self->req = 0; |
1240 |
worker_clear (self); |
1241 |
|
1242 |
UNLOCK (reslock); |
1243 |
} |
1244 |
|
1245 |
quit: |
1246 |
LOCK (wrklock); |
1247 |
worker_free (self); |
1248 |
UNLOCK (wrklock); |
1249 |
|
1250 |
return 0; |
1251 |
} |
1252 |
|
1253 |
/*****************************************************************************/ |
1254 |
|
1255 |
static void atfork_prepare (void) |
1256 |
{ |
1257 |
LOCK (wrklock); |
1258 |
LOCK (reqlock); |
1259 |
LOCK (reslock); |
1260 |
#if !HAVE_PREADWRITE |
1261 |
LOCK (preadwritelock); |
1262 |
#endif |
1263 |
#if !HAVE_READDIR_R |
1264 |
LOCK (readdirlock); |
1265 |
#endif |
1266 |
} |
1267 |
|
1268 |
static void atfork_parent (void) |
1269 |
{ |
1270 |
#if !HAVE_READDIR_R |
1271 |
UNLOCK (readdirlock); |
1272 |
#endif |
1273 |
#if !HAVE_PREADWRITE |
1274 |
UNLOCK (preadwritelock); |
1275 |
#endif |
1276 |
UNLOCK (reslock); |
1277 |
UNLOCK (reqlock); |
1278 |
UNLOCK (wrklock); |
1279 |
} |
1280 |
|
1281 |
static void atfork_child (void) |
1282 |
{ |
1283 |
aio_req prv; |
1284 |
|
1285 |
while (prv = reqq_shift (&req_queue)) |
1286 |
req_destroy (prv); |
1287 |
|
1288 |
while (prv = reqq_shift (&res_queue)) |
1289 |
req_destroy (prv); |
1290 |
|
1291 |
while (wrk_first.next != &wrk_first) |
1292 |
{ |
1293 |
worker *wrk = wrk_first.next; |
1294 |
|
1295 |
if (wrk->req) |
1296 |
req_destroy (wrk->req); |
1297 |
|
1298 |
worker_clear (wrk); |
1299 |
worker_free (wrk); |
1300 |
} |
1301 |
|
1302 |
started = 0; |
1303 |
idle = 0; |
1304 |
nreqs = 0; |
1305 |
nready = 0; |
1306 |
npending = 0; |
1307 |
|
1308 |
close (respipe [0]); |
1309 |
close (respipe [1]); |
1310 |
create_pipe (); |
1311 |
|
1312 |
atfork_parent (); |
1313 |
} |
1314 |
|
1315 |
#define dREQ \ |
1316 |
aio_req req; \ |
1317 |
int req_pri = next_pri; \ |
1318 |
next_pri = DEFAULT_PRI + PRI_BIAS; \ |
1319 |
\ |
1320 |
if (SvOK (callback) && !SvROK (callback)) \ |
1321 |
croak ("callback must be undef or of reference type"); \ |
1322 |
\ |
1323 |
Newz (0, req, 1, aio_cb); \ |
1324 |
if (!req) \ |
1325 |
croak ("out of memory during aio_req allocation"); \ |
1326 |
\ |
1327 |
req->callback = newSVsv (callback); \ |
1328 |
req->pri = req_pri |
1329 |
|
1330 |
#define REQ_SEND \ |
1331 |
req_send (req); \ |
1332 |
\ |
1333 |
if (GIMME_V != G_VOID) \ |
1334 |
XPUSHs (req_sv (req, AIO_REQ_KLASS)); |
1335 |
|
1336 |
MODULE = IO::AIO PACKAGE = IO::AIO |
1337 |
|
1338 |
PROTOTYPES: ENABLE |
1339 |
|
1340 |
BOOT: |
1341 |
{ |
1342 |
HV *stash = gv_stashpv ("IO::AIO", 1); |
1343 |
|
1344 |
newCONSTSUB (stash, "EXDEV", newSViv (EXDEV)); |
1345 |
newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY)); |
1346 |
newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY)); |
1347 |
newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT)); |
1348 |
newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC)); |
1349 |
newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO)); |
1350 |
newCONSTSUB (stash, "SIGIO", newSViv (SIGIO)); |
1351 |
|
1352 |
create_pipe (); |
1353 |
ATFORK (atfork_prepare, atfork_parent, atfork_child); |
1354 |
} |
1355 |
|
1356 |
void |
1357 |
max_poll_reqs (int nreqs) |
1358 |
PROTOTYPE: $ |
1359 |
CODE: |
1360 |
max_poll_reqs = nreqs; |
1361 |
|
1362 |
void |
1363 |
max_poll_time (double nseconds) |
1364 |
PROTOTYPE: $ |
1365 |
CODE: |
1366 |
max_poll_time = nseconds * AIO_TICKS; |
1367 |
|
1368 |
void |
1369 |
min_parallel (int nthreads) |
1370 |
PROTOTYPE: $ |
1371 |
|
1372 |
void |
1373 |
max_parallel (int nthreads) |
1374 |
PROTOTYPE: $ |
1375 |
|
1376 |
void |
1377 |
max_idle (int nthreads) |
1378 |
PROTOTYPE: $ |
1379 |
CODE: |
1380 |
set_max_idle (nthreads); |
1381 |
|
1382 |
int |
1383 |
max_outstanding (int maxreqs) |
1384 |
PROTOTYPE: $ |
1385 |
CODE: |
1386 |
RETVAL = max_outstanding; |
1387 |
max_outstanding = maxreqs; |
1388 |
OUTPUT: |
1389 |
RETVAL |
1390 |
|
1391 |
void |
1392 |
aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef) |
1393 |
PROTOTYPE: $$$;$ |
1394 |
PPCODE: |
1395 |
{ |
1396 |
dREQ; |
1397 |
|
1398 |
req->type = REQ_OPEN; |
1399 |
req->sv1 = newSVsv (pathname); |
1400 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
1401 |
req->int1 = flags; |
1402 |
req->mode = mode; |
1403 |
|
1404 |
REQ_SEND; |
1405 |
} |
1406 |
|
1407 |
void |
1408 |
aio_close (SV *fh, SV *callback=&PL_sv_undef) |
1409 |
PROTOTYPE: $;$ |
1410 |
ALIAS: |
1411 |
aio_close = REQ_CLOSE |
1412 |
aio_fsync = REQ_FSYNC |
1413 |
aio_fdatasync = REQ_FDATASYNC |
1414 |
PPCODE: |
1415 |
{ |
1416 |
dREQ; |
1417 |
|
1418 |
req->type = ix; |
1419 |
req->sv1 = newSVsv (fh); |
1420 |
req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh))); |
1421 |
|
1422 |
REQ_SEND (req); |
1423 |
} |
1424 |
|
1425 |
void |
1426 |
aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef) |
1427 |
ALIAS: |
1428 |
aio_read = REQ_READ |
1429 |
aio_write = REQ_WRITE |
1430 |
PROTOTYPE: $$$$$;$ |
1431 |
PPCODE: |
1432 |
{ |
1433 |
STRLEN svlen; |
1434 |
char *svptr = SvPVbyte (data, svlen); |
1435 |
UV len = SvUV (length); |
1436 |
|
1437 |
SvUPGRADE (data, SVt_PV); |
1438 |
SvPOK_on (data); |
1439 |
|
1440 |
if (dataoffset < 0) |
1441 |
dataoffset += svlen; |
1442 |
|
1443 |
if (dataoffset < 0 || dataoffset > svlen) |
1444 |
croak ("dataoffset outside of data scalar"); |
1445 |
|
1446 |
if (ix == REQ_WRITE) |
1447 |
{ |
1448 |
/* write: check length and adjust. */ |
1449 |
if (!SvOK (length) || len + dataoffset > svlen) |
1450 |
len = svlen - dataoffset; |
1451 |
} |
1452 |
else |
1453 |
{ |
1454 |
/* read: grow scalar as necessary */ |
1455 |
svptr = SvGROW (data, len + dataoffset + 1); |
1456 |
} |
1457 |
|
1458 |
if (len < 0) |
1459 |
croak ("length must not be negative"); |
1460 |
|
1461 |
{ |
1462 |
dREQ; |
1463 |
|
1464 |
req->type = ix; |
1465 |
req->sv1 = newSVsv (fh); |
1466 |
req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
1467 |
: IoOFP (sv_2io (fh))); |
1468 |
req->offs = SvOK (offset) ? SvVAL64 (offset) : -1; |
1469 |
req->size = len; |
1470 |
req->sv2 = SvREFCNT_inc (data); |
1471 |
req->ptr1 = (char *)svptr + dataoffset; |
1472 |
req->stroffset = dataoffset; |
1473 |
|
1474 |
if (!SvREADONLY (data)) |
1475 |
{ |
1476 |
SvREADONLY_on (data); |
1477 |
req->flags |= FLAG_SV2_RO_OFF; |
1478 |
} |
1479 |
|
1480 |
REQ_SEND; |
1481 |
} |
1482 |
} |
1483 |
|
1484 |
void |
1485 |
aio_readlink (SV8 *path, SV *callback=&PL_sv_undef) |
1486 |
PROTOTYPE: $$;$ |
1487 |
PPCODE: |
1488 |
{ |
1489 |
SV *data; |
1490 |
dREQ; |
1491 |
|
1492 |
data = newSV (NAME_MAX); |
1493 |
SvPOK_on (data); |
1494 |
|
1495 |
req->type = REQ_READLINK; |
1496 |
req->sv1 = newSVsv (path); |
1497 |
req->ptr2 = SvPVbyte_nolen (req->sv1); |
1498 |
req->sv2 = data; |
1499 |
req->ptr1 = SvPVbyte_nolen (data); |
1500 |
|
1501 |
REQ_SEND; |
1502 |
} |
1503 |
|
1504 |
void |
1505 |
aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef) |
1506 |
PROTOTYPE: $$$$;$ |
1507 |
PPCODE: |
1508 |
{ |
1509 |
dREQ; |
1510 |
|
1511 |
req->type = REQ_SENDFILE; |
1512 |
req->sv1 = newSVsv (out_fh); |
1513 |
req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh))); |
1514 |
req->sv2 = newSVsv (in_fh); |
1515 |
req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh))); |
1516 |
req->offs = SvVAL64 (in_offset); |
1517 |
req->size = length; |
1518 |
|
1519 |
REQ_SEND; |
1520 |
} |
1521 |
|
1522 |
void |
1523 |
aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef) |
1524 |
PROTOTYPE: $$$;$ |
1525 |
PPCODE: |
1526 |
{ |
1527 |
dREQ; |
1528 |
|
1529 |
req->type = REQ_READAHEAD; |
1530 |
req->sv1 = newSVsv (fh); |
1531 |
req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh))); |
1532 |
req->offs = SvVAL64 (offset); |
1533 |
req->size = length; |
1534 |
|
1535 |
REQ_SEND; |
1536 |
} |
1537 |
|
1538 |
void |
1539 |
aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef) |
1540 |
ALIAS: |
1541 |
aio_stat = REQ_STAT |
1542 |
aio_lstat = REQ_LSTAT |
1543 |
PPCODE: |
1544 |
{ |
1545 |
dREQ; |
1546 |
|
1547 |
req->ptr2 = malloc (sizeof (Stat_t)); |
1548 |
if (!req->ptr2) |
1549 |
{ |
1550 |
req_destroy (req); |
1551 |
croak ("out of memory during aio_stat statdata allocation"); |
1552 |
} |
1553 |
|
1554 |
req->flags |= FLAG_PTR2_FREE; |
1555 |
req->sv1 = newSVsv (fh_or_path); |
1556 |
|
1557 |
if (SvPOK (fh_or_path)) |
1558 |
{ |
1559 |
req->type = ix; |
1560 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
1561 |
} |
1562 |
else |
1563 |
{ |
1564 |
req->type = REQ_FSTAT; |
1565 |
req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
1566 |
} |
1567 |
|
1568 |
REQ_SEND; |
1569 |
} |
1570 |
|
1571 |
void |
1572 |
aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef) |
1573 |
PPCODE: |
1574 |
{ |
1575 |
dREQ; |
1576 |
|
1577 |
req->nv1 = SvOK (atime) ? SvNV (atime) : -1.; |
1578 |
req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.; |
1579 |
req->sv1 = newSVsv (fh_or_path); |
1580 |
|
1581 |
if (SvPOK (fh_or_path)) |
1582 |
{ |
1583 |
req->type = REQ_UTIME; |
1584 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
1585 |
} |
1586 |
else |
1587 |
{ |
1588 |
req->type = REQ_FUTIME; |
1589 |
req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
1590 |
} |
1591 |
|
1592 |
REQ_SEND; |
1593 |
} |
1594 |
|
1595 |
void |
1596 |
aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef) |
1597 |
PPCODE: |
1598 |
{ |
1599 |
dREQ; |
1600 |
|
1601 |
req->mode = mode; |
1602 |
req->sv1 = newSVsv (fh_or_path); |
1603 |
|
1604 |
if (SvPOK (fh_or_path)) |
1605 |
{ |
1606 |
req->type = REQ_CHMOD; |
1607 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
1608 |
} |
1609 |
else |
1610 |
{ |
1611 |
req->type = REQ_FCHMOD; |
1612 |
req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
1613 |
} |
1614 |
|
1615 |
REQ_SEND; |
1616 |
} |
1617 |
|
1618 |
void |
1619 |
aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef) |
1620 |
PPCODE: |
1621 |
{ |
1622 |
dREQ; |
1623 |
|
1624 |
req->int2 = SvOK (uid) ? SvIV (uid) : -1; |
1625 |
req->int3 = SvOK (gid) ? SvIV (gid) : -1; |
1626 |
req->sv1 = newSVsv (fh_or_path); |
1627 |
|
1628 |
if (SvPOK (fh_or_path)) |
1629 |
{ |
1630 |
req->type = REQ_CHOWN; |
1631 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
1632 |
} |
1633 |
else |
1634 |
{ |
1635 |
req->type = REQ_FCHOWN; |
1636 |
req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
1637 |
} |
1638 |
|
1639 |
REQ_SEND; |
1640 |
} |
1641 |
|
1642 |
void |
1643 |
aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef) |
1644 |
ALIAS: |
1645 |
aio_unlink = REQ_UNLINK |
1646 |
aio_rmdir = REQ_RMDIR |
1647 |
aio_readdir = REQ_READDIR |
1648 |
PPCODE: |
1649 |
{ |
1650 |
dREQ; |
1651 |
|
1652 |
req->type = ix; |
1653 |
req->sv1 = newSVsv (pathname); |
1654 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
1655 |
|
1656 |
REQ_SEND; |
1657 |
} |
1658 |
|
1659 |
void |
1660 |
aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef) |
1661 |
PPCODE: |
1662 |
{ |
1663 |
dREQ; |
1664 |
|
1665 |
req->type = REQ_MKDIR; |
1666 |
req->sv1 = newSVsv (pathname); |
1667 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
1668 |
req->mode = mode; |
1669 |
|
1670 |
REQ_SEND; |
1671 |
} |
1672 |
|
1673 |
void |
1674 |
aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef) |
1675 |
ALIAS: |
1676 |
aio_link = REQ_LINK |
1677 |
aio_symlink = REQ_SYMLINK |
1678 |
aio_rename = REQ_RENAME |
1679 |
PPCODE: |
1680 |
{ |
1681 |
dREQ; |
1682 |
|
1683 |
req->type = ix; |
1684 |
req->sv2 = newSVsv (oldpath); |
1685 |
req->ptr2 = SvPVbyte_nolen (req->sv2); |
1686 |
req->sv1 = newSVsv (newpath); |
1687 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
1688 |
|
1689 |
REQ_SEND; |
1690 |
} |
1691 |
|
1692 |
void |
1693 |
aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef) |
1694 |
PPCODE: |
1695 |
{ |
1696 |
dREQ; |
1697 |
|
1698 |
req->type = REQ_MKNOD; |
1699 |
req->sv1 = newSVsv (pathname); |
1700 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
1701 |
req->mode = (mode_t)mode; |
1702 |
req->offs = dev; |
1703 |
|
1704 |
REQ_SEND; |
1705 |
} |
1706 |
|
1707 |
void |
1708 |
aio_busy (double delay, SV *callback=&PL_sv_undef) |
1709 |
PPCODE: |
1710 |
{ |
1711 |
dREQ; |
1712 |
|
1713 |
req->type = REQ_BUSY; |
1714 |
req->nv1 = delay < 0. ? 0. : delay; |
1715 |
|
1716 |
REQ_SEND; |
1717 |
} |
1718 |
|
1719 |
void |
1720 |
aio_group (SV *callback=&PL_sv_undef) |
1721 |
PROTOTYPE: ;$ |
1722 |
PPCODE: |
1723 |
{ |
1724 |
dREQ; |
1725 |
|
1726 |
req->type = REQ_GROUP; |
1727 |
|
1728 |
req_send (req); |
1729 |
XPUSHs (req_sv (req, AIO_GRP_KLASS)); |
1730 |
} |
1731 |
|
1732 |
void |
1733 |
aio_nop (SV *callback=&PL_sv_undef) |
1734 |
PPCODE: |
1735 |
{ |
1736 |
dREQ; |
1737 |
|
1738 |
req->type = REQ_NOP; |
1739 |
|
1740 |
REQ_SEND; |
1741 |
} |
1742 |
|
1743 |
int |
1744 |
aioreq_pri (int pri = 0) |
1745 |
PROTOTYPE: ;$ |
1746 |
CODE: |
1747 |
RETVAL = next_pri - PRI_BIAS; |
1748 |
if (items > 0) |
1749 |
{ |
1750 |
if (pri < PRI_MIN) pri = PRI_MIN; |
1751 |
if (pri > PRI_MAX) pri = PRI_MAX; |
1752 |
next_pri = pri + PRI_BIAS; |
1753 |
} |
1754 |
OUTPUT: |
1755 |
RETVAL |
1756 |
|
1757 |
void |
1758 |
aioreq_nice (int nice = 0) |
1759 |
CODE: |
1760 |
nice = next_pri - nice; |
1761 |
if (nice < PRI_MIN) nice = PRI_MIN; |
1762 |
if (nice > PRI_MAX) nice = PRI_MAX; |
1763 |
next_pri = nice + PRI_BIAS; |
1764 |
|
1765 |
void |
1766 |
flush () |
1767 |
PROTOTYPE: |
1768 |
CODE: |
1769 |
while (nreqs) |
1770 |
{ |
1771 |
poll_wait (); |
1772 |
poll_cb (); |
1773 |
} |
1774 |
|
1775 |
int |
1776 |
poll() |
1777 |
PROTOTYPE: |
1778 |
CODE: |
1779 |
poll_wait (); |
1780 |
RETVAL = poll_cb (); |
1781 |
OUTPUT: |
1782 |
RETVAL |
1783 |
|
1784 |
int |
1785 |
poll_fileno() |
1786 |
PROTOTYPE: |
1787 |
CODE: |
1788 |
RETVAL = respipe [0]; |
1789 |
OUTPUT: |
1790 |
RETVAL |
1791 |
|
1792 |
int |
1793 |
poll_cb(...) |
1794 |
PROTOTYPE: |
1795 |
CODE: |
1796 |
RETVAL = poll_cb (); |
1797 |
OUTPUT: |
1798 |
RETVAL |
1799 |
|
1800 |
void |
1801 |
poll_wait() |
1802 |
PROTOTYPE: |
1803 |
CODE: |
1804 |
poll_wait (); |
1805 |
|
1806 |
void |
1807 |
setsig (int signum = SIGIO) |
1808 |
PROTOTYPE: ;$ |
1809 |
CODE: |
1810 |
{ |
1811 |
if (block_sig_level) |
1812 |
croak ("cannot call IO::AIO::setsig from within aio_block/callback"); |
1813 |
|
1814 |
LOCK (reslock); |
1815 |
main_tid = pthread_self (); |
1816 |
main_sig = signum; |
1817 |
UNLOCK (reslock); |
1818 |
|
1819 |
if (main_sig && npending) |
1820 |
pthread_kill (main_tid, main_sig); |
1821 |
} |
1822 |
|
1823 |
void |
1824 |
aio_block (SV *cb) |
1825 |
PROTOTYPE: & |
1826 |
PPCODE: |
1827 |
{ |
1828 |
int count; |
1829 |
|
1830 |
block_sig (); |
1831 |
PUSHMARK (SP); |
1832 |
PUTBACK; |
1833 |
count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL); |
1834 |
SPAGAIN; |
1835 |
unblock_sig (); |
1836 |
|
1837 |
if (SvTRUE (ERRSV)) |
1838 |
croak (0); |
1839 |
|
1840 |
XSRETURN (count); |
1841 |
} |
1842 |
|
1843 |
int |
1844 |
nreqs() |
1845 |
PROTOTYPE: |
1846 |
CODE: |
1847 |
RETVAL = nreqs; |
1848 |
OUTPUT: |
1849 |
RETVAL |
1850 |
|
1851 |
int |
1852 |
nready() |
1853 |
PROTOTYPE: |
1854 |
CODE: |
1855 |
RETVAL = get_nready (); |
1856 |
OUTPUT: |
1857 |
RETVAL |
1858 |
|
1859 |
int |
1860 |
npending() |
1861 |
PROTOTYPE: |
1862 |
CODE: |
1863 |
RETVAL = get_npending (); |
1864 |
OUTPUT: |
1865 |
RETVAL |
1866 |
|
1867 |
int |
1868 |
nthreads() |
1869 |
PROTOTYPE: |
1870 |
CODE: |
1871 |
if (WORDACCESS_UNSAFE) LOCK (wrklock); |
1872 |
RETVAL = started; |
1873 |
if (WORDACCESS_UNSAFE) UNLOCK (wrklock); |
1874 |
OUTPUT: |
1875 |
RETVAL |
1876 |
|
1877 |
PROTOTYPES: DISABLE |
1878 |
|
1879 |
MODULE = IO::AIO PACKAGE = IO::AIO::REQ |
1880 |
|
1881 |
void |
1882 |
cancel (aio_req_ornot req) |
1883 |
CODE: |
1884 |
req_cancel (req); |
1885 |
|
1886 |
void |
1887 |
cb (aio_req_ornot req, SV *callback=&PL_sv_undef) |
1888 |
CODE: |
1889 |
SvREFCNT_dec (req->callback); |
1890 |
req->callback = newSVsv (callback); |
1891 |
|
1892 |
MODULE = IO::AIO PACKAGE = IO::AIO::GRP |
1893 |
|
1894 |
void |
1895 |
add (aio_req grp, ...) |
1896 |
PPCODE: |
1897 |
{ |
1898 |
int i; |
1899 |
aio_req req; |
1900 |
|
1901 |
if (main_sig && !block_sig_level) |
1902 |
croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use"); |
1903 |
|
1904 |
if (grp->int1 == 2) |
1905 |
croak ("cannot add requests to IO::AIO::GRP after the group finished"); |
1906 |
|
1907 |
for (i = 1; i < items; ++i ) |
1908 |
{ |
1909 |
if (GIMME_V != G_VOID) |
1910 |
XPUSHs (sv_2mortal (newSVsv (ST (i)))); |
1911 |
|
1912 |
req = SvAIO_REQ (ST (i)); |
1913 |
|
1914 |
if (req) |
1915 |
{ |
1916 |
++grp->size; |
1917 |
req->grp = grp; |
1918 |
|
1919 |
req->grp_prev = 0; |
1920 |
req->grp_next = grp->grp_first; |
1921 |
|
1922 |
if (grp->grp_first) |
1923 |
grp->grp_first->grp_prev = req; |
1924 |
|
1925 |
grp->grp_first = req; |
1926 |
} |
1927 |
} |
1928 |
} |
1929 |
|
1930 |
void |
1931 |
cancel_subs (aio_req_ornot req) |
1932 |
CODE: |
1933 |
req_cancel_subs (req); |
1934 |
|
1935 |
void |
1936 |
result (aio_req grp, ...) |
1937 |
CODE: |
1938 |
{ |
1939 |
int i; |
1940 |
AV *av; |
1941 |
|
1942 |
grp->errorno = errno; |
1943 |
|
1944 |
av = newAV (); |
1945 |
|
1946 |
for (i = 1; i < items; ++i ) |
1947 |
av_push (av, newSVsv (ST (i))); |
1948 |
|
1949 |
SvREFCNT_dec (grp->sv1); |
1950 |
grp->sv1 = (SV *)av; |
1951 |
} |
1952 |
|
1953 |
void |
1954 |
errno (aio_req grp, int errorno = errno) |
1955 |
CODE: |
1956 |
grp->errorno = errorno; |
1957 |
|
1958 |
void |
1959 |
limit (aio_req grp, int limit) |
1960 |
CODE: |
1961 |
grp->int2 = limit; |
1962 |
aio_grp_feed (grp); |
1963 |
|
1964 |
void |
1965 |
feed (aio_req grp, SV *callback=&PL_sv_undef) |
1966 |
CODE: |
1967 |
{ |
1968 |
SvREFCNT_dec (grp->sv2); |
1969 |
grp->sv2 = newSVsv (callback); |
1970 |
|
1971 |
if (grp->int2 <= 0) |
1972 |
grp->int2 = 2; |
1973 |
|
1974 |
aio_grp_feed (grp); |
1975 |
} |
1976 |
|