1 |
/* solaris */ |
2 |
#define _POSIX_PTHREAD_SEMANTICS 1 |
3 |
|
4 |
#if __linux && !defined(_GNU_SOURCE) |
5 |
# define _GNU_SOURCE |
6 |
#endif |
7 |
|
8 |
/* just in case */ |
9 |
#define _REENTRANT 1 |
10 |
|
11 |
#include <errno.h> |
12 |
|
13 |
#include "EXTERN.h" |
14 |
#include "perl.h" |
15 |
#include "XSUB.h" |
16 |
|
17 |
#include "autoconf/config.h" |
18 |
|
19 |
#include <pthread.h> |
20 |
|
21 |
#include <stddef.h> |
22 |
#include <errno.h> |
23 |
#include <sys/time.h> |
24 |
#include <sys/select.h> |
25 |
#include <sys/types.h> |
26 |
#include <sys/stat.h> |
27 |
#include <limits.h> |
28 |
#include <unistd.h> |
29 |
#include <fcntl.h> |
30 |
#include <signal.h> |
31 |
#include <sched.h> |
32 |
|
33 |
#if HAVE_SENDFILE |
34 |
# if __linux |
35 |
# include <sys/sendfile.h> |
36 |
# elif __freebsd |
37 |
# include <sys/socket.h> |
38 |
# include <sys/uio.h> |
39 |
# elif __hpux |
40 |
# include <sys/socket.h> |
41 |
# elif __solaris /* not yet */ |
42 |
# include <sys/sendfile.h> |
43 |
# else |
44 |
# error sendfile support requested but not available |
45 |
# endif |
46 |
#endif |
47 |
|
48 |
/* number of seconds after which idle threads exit */ |
49 |
#define IDLE_TIMEOUT 10 |
50 |
|
51 |
/* used for struct dirent, AIX doesn't provide it */ |
52 |
#ifndef NAME_MAX |
53 |
# define NAME_MAX 4096 |
54 |
#endif |
55 |
|
56 |
#ifndef PTHREAD_STACK_MIN |
57 |
/* care for broken platforms, e.g. windows */ |
58 |
# define PTHREAD_STACK_MIN 16384 |
59 |
#endif |
60 |
|
61 |
#if __ia64 |
62 |
# define STACKSIZE 65536 |
63 |
#elif __i386 || __x86_64 /* 16k is unreasonably high :( */ |
64 |
# define STACKSIZE PTHREAD_STACK_MIN |
65 |
#else |
66 |
# define STACKSIZE 16384 |
67 |
#endif |
68 |
|
69 |
/* wether word reads are potentially non-atomic. |
70 |
* this is conservatice, likely most arches this runs |
71 |
* on have atomic word read/writes. |
72 |
*/ |
73 |
#ifndef WORDACCESS_UNSAFE |
74 |
# if __i386 || __x86_64 |
75 |
# define WORDACCESS_UNSAFE 0 |
76 |
# else |
77 |
# define WORDACCESS_UNSAFE 1 |
78 |
# endif |
79 |
#endif |
80 |
|
81 |
/* buffer size for various temporary buffers */ |
82 |
#define AIO_BUFSIZE 65536 |
83 |
|
84 |
#define dBUF \ |
85 |
char *aio_buf; \ |
86 |
LOCK (wrklock); \ |
87 |
self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \ |
88 |
UNLOCK (wrklock); \ |
89 |
if (!aio_buf) \ |
90 |
return -1; |
91 |
|
92 |
enum { |
93 |
REQ_QUIT, |
94 |
REQ_OPEN, REQ_CLOSE, |
95 |
REQ_READ, REQ_WRITE, REQ_READAHEAD, |
96 |
REQ_SENDFILE, |
97 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, |
98 |
REQ_FSYNC, REQ_FDATASYNC, |
99 |
REQ_UNLINK, REQ_RMDIR, REQ_RENAME, |
100 |
REQ_MKNOD, REQ_READDIR, |
101 |
REQ_LINK, REQ_SYMLINK, |
102 |
REQ_GROUP, REQ_NOP, |
103 |
REQ_BUSY, |
104 |
}; |
105 |
|
106 |
#define AIO_REQ_KLASS "IO::AIO::REQ" |
107 |
#define AIO_GRP_KLASS "IO::AIO::GRP" |
108 |
|
109 |
typedef struct aio_cb |
110 |
{ |
111 |
struct aio_cb *volatile next; |
112 |
|
113 |
SV *data, *callback; |
114 |
SV *fh, *fh2; |
115 |
void *dataptr, *data2ptr; |
116 |
Stat_t *statdata; |
117 |
off_t offset; |
118 |
size_t length; |
119 |
ssize_t result; |
120 |
|
121 |
STRLEN dataoffset; |
122 |
int type; |
123 |
int fd, fd2; |
124 |
int errorno; |
125 |
mode_t mode; /* open */ |
126 |
|
127 |
unsigned char flags; |
128 |
unsigned char pri; |
129 |
|
130 |
SV *self; /* the perl counterpart of this request, if any */ |
131 |
struct aio_cb *grp, *grp_prev, *grp_next, *grp_first; |
132 |
} aio_cb; |
133 |
|
134 |
enum { |
135 |
FLAG_CANCELLED = 0x01, |
136 |
}; |
137 |
|
138 |
typedef aio_cb *aio_req; |
139 |
typedef aio_cb *aio_req_ornot; |
140 |
|
141 |
enum { |
142 |
PRI_MIN = -4, |
143 |
PRI_MAX = 4, |
144 |
|
145 |
DEFAULT_PRI = 0, |
146 |
PRI_BIAS = -PRI_MIN, |
147 |
NUM_PRI = PRI_MAX + PRI_BIAS + 1, |
148 |
}; |
149 |
|
150 |
#define AIO_TICKS ((1000000 + 1023) >> 10) |
151 |
|
152 |
static unsigned int max_poll_time = 0; |
153 |
static unsigned int max_poll_reqs = 0; |
154 |
|
155 |
/* calculcate time difference in ~1/AIO_TICKS of a second */ |
156 |
static int tvdiff (struct timeval *tv1, struct timeval *tv2) |
157 |
{ |
158 |
return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS |
159 |
+ ((tv2->tv_usec - tv1->tv_usec) >> 10); |
160 |
} |
161 |
|
162 |
static int next_pri = DEFAULT_PRI + PRI_BIAS; |
163 |
|
164 |
static unsigned int started, idle, wanted; |
165 |
|
166 |
#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
167 |
# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
168 |
#else |
169 |
# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER |
170 |
#endif |
171 |
|
172 |
#define LOCK(mutex) pthread_mutex_lock (&(mutex)) |
173 |
#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex)) |
174 |
|
175 |
/* worker threads management */ |
176 |
static pthread_mutex_t wrklock = AIO_MUTEX_INIT; |
177 |
|
178 |
typedef struct worker { |
179 |
/* locked by wrklock */ |
180 |
struct worker *prev, *next; |
181 |
|
182 |
pthread_t tid; |
183 |
|
184 |
/* locked by reslock, reqlock or wrklock */ |
185 |
aio_req req; /* currently processed request */ |
186 |
void *dbuf; |
187 |
DIR *dirp; |
188 |
} worker; |
189 |
|
190 |
static worker wrk_first = { &wrk_first, &wrk_first, 0 }; |
191 |
|
192 |
static void worker_clear (worker *wrk) |
193 |
{ |
194 |
if (wrk->dirp) |
195 |
{ |
196 |
closedir (wrk->dirp); |
197 |
wrk->dirp = 0; |
198 |
} |
199 |
|
200 |
if (wrk->dbuf) |
201 |
{ |
202 |
free (wrk->dbuf); |
203 |
wrk->dbuf = 0; |
204 |
} |
205 |
} |
206 |
|
207 |
static void worker_free (worker *wrk) |
208 |
{ |
209 |
wrk->next->prev = wrk->prev; |
210 |
wrk->prev->next = wrk->next; |
211 |
|
212 |
free (wrk); |
213 |
} |
214 |
|
215 |
static volatile unsigned int nreqs, nready, npending; |
216 |
static volatile unsigned int max_idle = 4; |
217 |
static volatile unsigned int max_outstanding = 0xffffffff; |
218 |
static int respipe [2]; |
219 |
|
220 |
static pthread_mutex_t reslock = AIO_MUTEX_INIT; |
221 |
static pthread_mutex_t reqlock = AIO_MUTEX_INIT; |
222 |
static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
223 |
|
224 |
#if WORDACCESS_UNSAFE |
225 |
|
226 |
static unsigned int get_nready () |
227 |
{ |
228 |
unsigned int retval; |
229 |
|
230 |
LOCK (reqlock); |
231 |
retval = nready; |
232 |
UNLOCK (reqlock); |
233 |
|
234 |
return retval; |
235 |
} |
236 |
|
237 |
static unsigned int get_npending () |
238 |
{ |
239 |
unsigned int retval; |
240 |
|
241 |
LOCK (reslock); |
242 |
retval = npending; |
243 |
UNLOCK (reslock); |
244 |
|
245 |
return retval; |
246 |
} |
247 |
|
248 |
static unsigned int get_nthreads () |
249 |
{ |
250 |
unsigned int retval; |
251 |
|
252 |
LOCK (wrklock); |
253 |
retval = started; |
254 |
UNLOCK (wrklock); |
255 |
|
256 |
return retval; |
257 |
} |
258 |
|
259 |
#else |
260 |
|
261 |
# define get_nready() nready |
262 |
# define get_npending() npending |
263 |
# define get_nthreads() started |
264 |
|
265 |
#endif |
266 |
|
267 |
/* |
268 |
* a somewhat faster data structure might be nice, but |
269 |
* with 8 priorities this actually needs <20 insns |
270 |
* per shift, the most expensive operation. |
271 |
*/ |
272 |
typedef struct { |
273 |
aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */ |
274 |
int size; |
275 |
} reqq; |
276 |
|
277 |
static reqq req_queue; |
278 |
static reqq res_queue; |
279 |
|
280 |
int reqq_push (reqq *q, aio_req req) |
281 |
{ |
282 |
int pri = req->pri; |
283 |
req->next = 0; |
284 |
|
285 |
if (q->qe[pri]) |
286 |
{ |
287 |
q->qe[pri]->next = req; |
288 |
q->qe[pri] = req; |
289 |
} |
290 |
else |
291 |
q->qe[pri] = q->qs[pri] = req; |
292 |
|
293 |
return q->size++; |
294 |
} |
295 |
|
296 |
aio_req reqq_shift (reqq *q) |
297 |
{ |
298 |
int pri; |
299 |
|
300 |
if (!q->size) |
301 |
return 0; |
302 |
|
303 |
--q->size; |
304 |
|
305 |
for (pri = NUM_PRI; pri--; ) |
306 |
{ |
307 |
aio_req req = q->qs[pri]; |
308 |
|
309 |
if (req) |
310 |
{ |
311 |
if (!(q->qs[pri] = req->next)) |
312 |
q->qe[pri] = 0; |
313 |
|
314 |
return req; |
315 |
} |
316 |
} |
317 |
|
318 |
abort (); |
319 |
} |
320 |
|
321 |
static int poll_cb (); |
322 |
static void req_invoke (aio_req req); |
323 |
static void req_free (aio_req req); |
324 |
static void req_cancel (aio_req req); |
325 |
|
326 |
/* must be called at most once */ |
327 |
static SV *req_sv (aio_req req, const char *klass) |
328 |
{ |
329 |
if (!req->self) |
330 |
{ |
331 |
req->self = (SV *)newHV (); |
332 |
sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0); |
333 |
} |
334 |
|
335 |
return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1))); |
336 |
} |
337 |
|
338 |
static aio_req SvAIO_REQ (SV *sv) |
339 |
{ |
340 |
MAGIC *mg; |
341 |
|
342 |
if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv)) |
343 |
croak ("object of class " AIO_REQ_KLASS " expected"); |
344 |
|
345 |
mg = mg_find (SvRV (sv), PERL_MAGIC_ext); |
346 |
|
347 |
return mg ? (aio_req)mg->mg_ptr : 0; |
348 |
} |
349 |
|
350 |
static void aio_grp_feed (aio_req grp) |
351 |
{ |
352 |
while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED)) |
353 |
{ |
354 |
int old_len = grp->length; |
355 |
|
356 |
if (grp->fh2 && SvOK (grp->fh2)) |
357 |
{ |
358 |
dSP; |
359 |
|
360 |
ENTER; |
361 |
SAVETMPS; |
362 |
PUSHMARK (SP); |
363 |
XPUSHs (req_sv (grp, AIO_GRP_KLASS)); |
364 |
PUTBACK; |
365 |
call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR); |
366 |
SPAGAIN; |
367 |
FREETMPS; |
368 |
LEAVE; |
369 |
} |
370 |
|
371 |
/* stop if no progress has been made */ |
372 |
if (old_len == grp->length) |
373 |
{ |
374 |
SvREFCNT_dec (grp->fh2); |
375 |
grp->fh2 = 0; |
376 |
break; |
377 |
} |
378 |
} |
379 |
} |
380 |
|
381 |
static void aio_grp_dec (aio_req grp) |
382 |
{ |
383 |
--grp->length; |
384 |
|
385 |
/* call feeder, if applicable */ |
386 |
aio_grp_feed (grp); |
387 |
|
388 |
/* finish, if done */ |
389 |
if (!grp->length && grp->fd) |
390 |
{ |
391 |
req_invoke (grp); |
392 |
req_free (grp); |
393 |
} |
394 |
} |
395 |
|
396 |
static void req_invoke (aio_req req) |
397 |
{ |
398 |
dSP; |
399 |
|
400 |
if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback)) |
401 |
{ |
402 |
ENTER; |
403 |
SAVETMPS; |
404 |
PUSHMARK (SP); |
405 |
EXTEND (SP, 1); |
406 |
|
407 |
switch (req->type) |
408 |
{ |
409 |
case REQ_READDIR: |
410 |
{ |
411 |
SV *rv = &PL_sv_undef; |
412 |
|
413 |
if (req->result >= 0) |
414 |
{ |
415 |
int i; |
416 |
char *buf = req->data2ptr; |
417 |
AV *av = newAV (); |
418 |
|
419 |
av_extend (av, req->result - 1); |
420 |
|
421 |
for (i = 0; i < req->result; ++i) |
422 |
{ |
423 |
SV *sv = newSVpv (buf, 0); |
424 |
|
425 |
av_store (av, i, sv); |
426 |
buf += SvCUR (sv) + 1; |
427 |
} |
428 |
|
429 |
rv = sv_2mortal (newRV_noinc ((SV *)av)); |
430 |
} |
431 |
|
432 |
PUSHs (rv); |
433 |
} |
434 |
break; |
435 |
|
436 |
case REQ_OPEN: |
437 |
{ |
438 |
/* convert fd to fh */ |
439 |
SV *fh; |
440 |
|
441 |
PUSHs (sv_2mortal (newSViv (req->result))); |
442 |
PUTBACK; |
443 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
444 |
SPAGAIN; |
445 |
|
446 |
fh = SvREFCNT_inc (POPs); |
447 |
|
448 |
PUSHMARK (SP); |
449 |
XPUSHs (sv_2mortal (fh)); |
450 |
} |
451 |
break; |
452 |
|
453 |
case REQ_GROUP: |
454 |
req->fd = 2; /* mark group as finished */ |
455 |
|
456 |
if (req->data) |
457 |
{ |
458 |
int i; |
459 |
AV *av = (AV *)req->data; |
460 |
|
461 |
EXTEND (SP, AvFILL (av) + 1); |
462 |
for (i = 0; i <= AvFILL (av); ++i) |
463 |
PUSHs (*av_fetch (av, i, 0)); |
464 |
} |
465 |
break; |
466 |
|
467 |
case REQ_NOP: |
468 |
case REQ_BUSY: |
469 |
break; |
470 |
|
471 |
default: |
472 |
PUSHs (sv_2mortal (newSViv (req->result))); |
473 |
break; |
474 |
} |
475 |
|
476 |
errno = req->errorno; |
477 |
|
478 |
PUTBACK; |
479 |
call_sv (req->callback, G_VOID | G_EVAL); |
480 |
SPAGAIN; |
481 |
|
482 |
FREETMPS; |
483 |
LEAVE; |
484 |
} |
485 |
|
486 |
if (req->grp) |
487 |
{ |
488 |
aio_req grp = req->grp; |
489 |
|
490 |
/* unlink request */ |
491 |
if (req->grp_next) req->grp_next->grp_prev = req->grp_prev; |
492 |
if (req->grp_prev) req->grp_prev->grp_next = req->grp_next; |
493 |
|
494 |
if (grp->grp_first == req) |
495 |
grp->grp_first = req->grp_next; |
496 |
|
497 |
aio_grp_dec (grp); |
498 |
} |
499 |
|
500 |
if (SvTRUE (ERRSV)) |
501 |
{ |
502 |
req_free (req); |
503 |
croak (0); |
504 |
} |
505 |
} |
506 |
|
507 |
static void req_free (aio_req req) |
508 |
{ |
509 |
if (req->self) |
510 |
{ |
511 |
sv_unmagic (req->self, PERL_MAGIC_ext); |
512 |
SvREFCNT_dec (req->self); |
513 |
} |
514 |
|
515 |
SvREFCNT_dec (req->data); |
516 |
SvREFCNT_dec (req->fh); |
517 |
SvREFCNT_dec (req->fh2); |
518 |
SvREFCNT_dec (req->callback); |
519 |
Safefree (req->statdata); |
520 |
|
521 |
if (req->type == REQ_READDIR) |
522 |
free (req->data2ptr); |
523 |
|
524 |
Safefree (req); |
525 |
} |
526 |
|
527 |
static void req_cancel_subs (aio_req grp) |
528 |
{ |
529 |
aio_req sub; |
530 |
|
531 |
if (grp->type != REQ_GROUP) |
532 |
return; |
533 |
|
534 |
SvREFCNT_dec (grp->fh2); |
535 |
grp->fh2 = 0; |
536 |
|
537 |
for (sub = grp->grp_first; sub; sub = sub->grp_next) |
538 |
req_cancel (sub); |
539 |
} |
540 |
|
541 |
static void req_cancel (aio_req req) |
542 |
{ |
543 |
req->flags |= FLAG_CANCELLED; |
544 |
|
545 |
req_cancel_subs (req); |
546 |
} |
547 |
|
548 |
static void *aio_proc(void *arg); |
549 |
|
550 |
static void start_thread (void) |
551 |
{ |
552 |
sigset_t fullsigset, oldsigset; |
553 |
pthread_attr_t attr; |
554 |
|
555 |
worker *wrk = calloc (1, sizeof (worker)); |
556 |
|
557 |
if (!wrk) |
558 |
croak ("unable to allocate worker thread data"); |
559 |
|
560 |
pthread_attr_init (&attr); |
561 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
562 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
563 |
#ifdef PTHREAD_SCOPE_PROCESS |
564 |
pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
565 |
#endif |
566 |
|
567 |
sigfillset (&fullsigset); |
568 |
|
569 |
LOCK (wrklock); |
570 |
sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
571 |
|
572 |
if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0) |
573 |
{ |
574 |
wrk->prev = &wrk_first; |
575 |
wrk->next = wrk_first.next; |
576 |
wrk_first.next->prev = wrk; |
577 |
wrk_first.next = wrk; |
578 |
++started; |
579 |
} |
580 |
else |
581 |
free (wrk); |
582 |
|
583 |
sigprocmask (SIG_SETMASK, &oldsigset, 0); |
584 |
UNLOCK (wrklock); |
585 |
} |
586 |
|
587 |
static void maybe_start_thread () |
588 |
{ |
589 |
if (get_nthreads () >= wanted) |
590 |
return; |
591 |
|
592 |
/* todo: maybe use idle here, but might be less exact */ |
593 |
if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs) |
594 |
return; |
595 |
|
596 |
start_thread (); |
597 |
} |
598 |
|
599 |
static void req_send (aio_req req) |
600 |
{ |
601 |
++nreqs; |
602 |
|
603 |
LOCK (reqlock); |
604 |
++nready; |
605 |
reqq_push (&req_queue, req); |
606 |
pthread_cond_signal (&reqwait); |
607 |
UNLOCK (reqlock); |
608 |
|
609 |
maybe_start_thread (); |
610 |
} |
611 |
|
612 |
static void end_thread (void) |
613 |
{ |
614 |
aio_req req; |
615 |
|
616 |
Newz (0, req, 1, aio_cb); |
617 |
|
618 |
req->type = REQ_QUIT; |
619 |
req->pri = PRI_MAX + PRI_BIAS; |
620 |
|
621 |
LOCK (reqlock); |
622 |
reqq_push (&req_queue, req); |
623 |
pthread_cond_signal (&reqwait); |
624 |
UNLOCK (reqlock); |
625 |
|
626 |
LOCK (wrklock); |
627 |
--started; |
628 |
UNLOCK (wrklock); |
629 |
} |
630 |
|
631 |
static void set_max_idle (int nthreads) |
632 |
{ |
633 |
if (WORDACCESS_UNSAFE) LOCK (reqlock); |
634 |
max_idle = nthreads <= 0 ? 1 : nthreads; |
635 |
if (WORDACCESS_UNSAFE) UNLOCK (reqlock); |
636 |
} |
637 |
|
638 |
static void min_parallel (int nthreads) |
639 |
{ |
640 |
if (wanted < nthreads) |
641 |
wanted = nthreads; |
642 |
} |
643 |
|
644 |
static void max_parallel (int nthreads) |
645 |
{ |
646 |
if (wanted > nthreads) |
647 |
wanted = nthreads; |
648 |
|
649 |
while (started > wanted) |
650 |
end_thread (); |
651 |
} |
652 |
|
653 |
static void poll_wait () |
654 |
{ |
655 |
fd_set rfd; |
656 |
|
657 |
while (nreqs) |
658 |
{ |
659 |
int size; |
660 |
if (WORDACCESS_UNSAFE) LOCK (reslock); |
661 |
size = res_queue.size; |
662 |
if (WORDACCESS_UNSAFE) UNLOCK (reslock); |
663 |
|
664 |
if (size) |
665 |
return; |
666 |
|
667 |
maybe_start_thread (); |
668 |
|
669 |
FD_ZERO(&rfd); |
670 |
FD_SET(respipe [0], &rfd); |
671 |
|
672 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
673 |
} |
674 |
} |
675 |
|
676 |
static int poll_cb () |
677 |
{ |
678 |
dSP; |
679 |
int count = 0; |
680 |
int maxreqs = max_poll_reqs; |
681 |
int do_croak = 0; |
682 |
struct timeval tv_start, tv_now; |
683 |
aio_req req; |
684 |
|
685 |
if (max_poll_time) |
686 |
gettimeofday (&tv_start, 0); |
687 |
|
688 |
for (;;) |
689 |
{ |
690 |
for (;;) |
691 |
{ |
692 |
maybe_start_thread (); |
693 |
|
694 |
LOCK (reslock); |
695 |
req = reqq_shift (&res_queue); |
696 |
|
697 |
if (req) |
698 |
{ |
699 |
--npending; |
700 |
|
701 |
if (!res_queue.size) |
702 |
{ |
703 |
/* read any signals sent by the worker threads */ |
704 |
char buf [32]; |
705 |
while (read (respipe [0], buf, 32) == 32) |
706 |
; |
707 |
} |
708 |
} |
709 |
|
710 |
UNLOCK (reslock); |
711 |
|
712 |
if (!req) |
713 |
break; |
714 |
|
715 |
--nreqs; |
716 |
|
717 |
if (req->type == REQ_GROUP && req->length) |
718 |
{ |
719 |
req->fd = 1; /* mark request as delayed */ |
720 |
continue; |
721 |
} |
722 |
else |
723 |
{ |
724 |
if (req->type == REQ_READ) |
725 |
SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0)); |
726 |
|
727 |
if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE)) |
728 |
SvREADONLY_off (req->data); |
729 |
|
730 |
if (req->statdata) |
731 |
{ |
732 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
733 |
PL_laststatval = req->result; |
734 |
PL_statcache = *(req->statdata); |
735 |
} |
736 |
|
737 |
req_invoke (req); |
738 |
|
739 |
count++; |
740 |
} |
741 |
|
742 |
req_free (req); |
743 |
|
744 |
if (maxreqs && !--maxreqs) |
745 |
break; |
746 |
|
747 |
if (max_poll_time) |
748 |
{ |
749 |
gettimeofday (&tv_now, 0); |
750 |
|
751 |
if (tvdiff (&tv_start, &tv_now) >= max_poll_time) |
752 |
break; |
753 |
} |
754 |
} |
755 |
|
756 |
if (nreqs <= max_outstanding) |
757 |
break; |
758 |
|
759 |
poll_wait (); |
760 |
|
761 |
++maxreqs; |
762 |
} |
763 |
|
764 |
return count; |
765 |
} |
766 |
|
767 |
static void create_pipe () |
768 |
{ |
769 |
if (pipe (respipe)) |
770 |
croak ("unable to initialize result pipe"); |
771 |
|
772 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
773 |
croak ("cannot set result pipe to nonblocking mode"); |
774 |
|
775 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
776 |
croak ("cannot set result pipe to nonblocking mode"); |
777 |
} |
778 |
|
779 |
/*****************************************************************************/ |
780 |
/* work around various missing functions */ |
781 |
|
782 |
#if !HAVE_PREADWRITE |
783 |
# define pread aio_pread |
784 |
# define pwrite aio_pwrite |
785 |
|
786 |
/* |
787 |
* make our pread/pwrite safe against themselves, but not against |
788 |
* normal read/write by using a mutex. slows down execution a lot, |
789 |
* but that's your problem, not mine. |
790 |
*/ |
791 |
static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER; |
792 |
|
793 |
static ssize_t pread (int fd, void *buf, size_t count, off_t offset) |
794 |
{ |
795 |
ssize_t res; |
796 |
off_t ooffset; |
797 |
|
798 |
LOCK (preadwritelock); |
799 |
ooffset = lseek (fd, 0, SEEK_CUR); |
800 |
lseek (fd, offset, SEEK_SET); |
801 |
res = read (fd, buf, count); |
802 |
lseek (fd, ooffset, SEEK_SET); |
803 |
UNLOCK (preadwritelock); |
804 |
|
805 |
return res; |
806 |
} |
807 |
|
808 |
static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset) |
809 |
{ |
810 |
ssize_t res; |
811 |
off_t ooffset; |
812 |
|
813 |
LOCK (preadwritelock); |
814 |
ooffset = lseek (fd, 0, SEEK_CUR); |
815 |
lseek (fd, offset, SEEK_SET); |
816 |
res = write (fd, buf, count); |
817 |
lseek (fd, offset, SEEK_SET); |
818 |
UNLOCK (preadwritelock); |
819 |
|
820 |
return res; |
821 |
} |
822 |
#endif |
823 |
|
824 |
#if !HAVE_FDATASYNC |
825 |
# define fdatasync fsync |
826 |
#endif |
827 |
|
828 |
#if !HAVE_READAHEAD |
829 |
# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self) |
830 |
|
831 |
static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self) |
832 |
{ |
833 |
dBUF; |
834 |
|
835 |
while (count > 0) |
836 |
{ |
837 |
size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE; |
838 |
|
839 |
pread (fd, aio_buf, len, offset); |
840 |
offset += len; |
841 |
count -= len; |
842 |
} |
843 |
|
844 |
errno = 0; |
845 |
} |
846 |
|
847 |
#endif |
848 |
|
849 |
#if !HAVE_READDIR_R |
850 |
# define readdir_r aio_readdir_r |
851 |
|
852 |
static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER; |
853 |
|
854 |
static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res) |
855 |
{ |
856 |
struct dirent *e; |
857 |
int errorno; |
858 |
|
859 |
LOCK (readdirlock); |
860 |
|
861 |
e = readdir (dirp); |
862 |
errorno = errno; |
863 |
|
864 |
if (e) |
865 |
{ |
866 |
*res = ent; |
867 |
strcpy (ent->d_name, e->d_name); |
868 |
} |
869 |
else |
870 |
*res = 0; |
871 |
|
872 |
UNLOCK (readdirlock); |
873 |
|
874 |
errno = errorno; |
875 |
return e ? 0 : -1; |
876 |
} |
877 |
#endif |
878 |
|
879 |
/* sendfile always needs emulation */ |
880 |
static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self) |
881 |
{ |
882 |
ssize_t res; |
883 |
|
884 |
if (!count) |
885 |
return 0; |
886 |
|
887 |
#if HAVE_SENDFILE |
888 |
# if __linux |
889 |
res = sendfile (ofd, ifd, &offset, count); |
890 |
|
891 |
# elif __freebsd |
892 |
/* |
893 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
894 |
* wasted on making it similar to other I/O functions. |
895 |
*/ |
896 |
{ |
897 |
off_t sbytes; |
898 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
899 |
|
900 |
if (res < 0 && sbytes) |
901 |
/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */ |
902 |
res = sbytes; |
903 |
} |
904 |
|
905 |
# elif __hpux |
906 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
907 |
|
908 |
# elif __solaris |
909 |
{ |
910 |
struct sendfilevec vec; |
911 |
size_t sbytes; |
912 |
|
913 |
vec.sfv_fd = ifd; |
914 |
vec.sfv_flag = 0; |
915 |
vec.sfv_off = offset; |
916 |
vec.sfv_len = count; |
917 |
|
918 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
919 |
|
920 |
if (res < 0 && sbytes) |
921 |
res = sbytes; |
922 |
} |
923 |
|
924 |
# endif |
925 |
#else |
926 |
res = -1; |
927 |
errno = ENOSYS; |
928 |
#endif |
929 |
|
930 |
if (res < 0 |
931 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
932 |
#if __solaris |
933 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
934 |
#endif |
935 |
) |
936 |
) |
937 |
{ |
938 |
/* emulate sendfile. this is a major pain in the ass */ |
939 |
dBUF; |
940 |
|
941 |
res = 0; |
942 |
|
943 |
while (count) |
944 |
{ |
945 |
ssize_t cnt; |
946 |
|
947 |
cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset); |
948 |
|
949 |
if (cnt <= 0) |
950 |
{ |
951 |
if (cnt && !res) res = -1; |
952 |
break; |
953 |
} |
954 |
|
955 |
cnt = write (ofd, aio_buf, cnt); |
956 |
|
957 |
if (cnt <= 0) |
958 |
{ |
959 |
if (cnt && !res) res = -1; |
960 |
break; |
961 |
} |
962 |
|
963 |
offset += cnt; |
964 |
res += cnt; |
965 |
count -= cnt; |
966 |
} |
967 |
} |
968 |
|
969 |
return res; |
970 |
} |
971 |
|
972 |
/* read a full directory */ |
973 |
static void scandir_ (aio_req req, worker *self) |
974 |
{ |
975 |
DIR *dirp; |
976 |
union |
977 |
{ |
978 |
struct dirent d; |
979 |
char b [offsetof (struct dirent, d_name) + NAME_MAX + 1]; |
980 |
} *u; |
981 |
struct dirent *entp; |
982 |
char *name, *names; |
983 |
int memlen = 4096; |
984 |
int memofs = 0; |
985 |
int res = 0; |
986 |
int errorno; |
987 |
|
988 |
LOCK (wrklock); |
989 |
self->dirp = dirp = opendir (req->dataptr); |
990 |
self->dbuf = u = malloc (sizeof (*u)); |
991 |
req->data2ptr = names = malloc (memlen); |
992 |
UNLOCK (wrklock); |
993 |
|
994 |
if (dirp && u && names) |
995 |
for (;;) |
996 |
{ |
997 |
errno = 0; |
998 |
readdir_r (dirp, &u->d, &entp); |
999 |
|
1000 |
if (!entp) |
1001 |
break; |
1002 |
|
1003 |
name = entp->d_name; |
1004 |
|
1005 |
if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
1006 |
{ |
1007 |
int len = strlen (name) + 1; |
1008 |
|
1009 |
res++; |
1010 |
|
1011 |
while (memofs + len > memlen) |
1012 |
{ |
1013 |
memlen *= 2; |
1014 |
LOCK (wrklock); |
1015 |
req->data2ptr = names = realloc (names, memlen); |
1016 |
UNLOCK (wrklock); |
1017 |
|
1018 |
if (!names) |
1019 |
break; |
1020 |
} |
1021 |
|
1022 |
memcpy (names + memofs, name, len); |
1023 |
memofs += len; |
1024 |
} |
1025 |
} |
1026 |
|
1027 |
if (errno) |
1028 |
res = -1; |
1029 |
|
1030 |
req->result = res; |
1031 |
} |
1032 |
|
1033 |
/*****************************************************************************/ |
1034 |
|
1035 |
static void *aio_proc (void *thr_arg) |
1036 |
{ |
1037 |
aio_req req; |
1038 |
struct timespec ts; |
1039 |
worker *self = (worker *)thr_arg; |
1040 |
|
1041 |
/* try to distribute timeouts somewhat evenly */ |
1042 |
ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL) |
1043 |
* (1000000000UL / 1024UL); |
1044 |
|
1045 |
for (;;) |
1046 |
{ |
1047 |
ts.tv_sec = time (0) + IDLE_TIMEOUT; |
1048 |
|
1049 |
LOCK (reqlock); |
1050 |
|
1051 |
for (;;) |
1052 |
{ |
1053 |
self->req = req = reqq_shift (&req_queue); |
1054 |
|
1055 |
if (req) |
1056 |
break; |
1057 |
|
1058 |
++idle; |
1059 |
|
1060 |
if (pthread_cond_timedwait (&reqwait, &reqlock, &ts) |
1061 |
== ETIMEDOUT) |
1062 |
{ |
1063 |
if (idle > max_idle) |
1064 |
{ |
1065 |
--idle; |
1066 |
UNLOCK (reqlock); |
1067 |
LOCK (wrklock); |
1068 |
--started; |
1069 |
UNLOCK (wrklock); |
1070 |
goto quit; |
1071 |
} |
1072 |
|
1073 |
/* we are allowed to idle, so do so without any timeout */ |
1074 |
pthread_cond_wait (&reqwait, &reqlock); |
1075 |
ts.tv_sec = time (0) + IDLE_TIMEOUT; |
1076 |
} |
1077 |
|
1078 |
--idle; |
1079 |
} |
1080 |
|
1081 |
--nready; |
1082 |
|
1083 |
UNLOCK (reqlock); |
1084 |
|
1085 |
errno = 0; /* strictly unnecessary */ |
1086 |
|
1087 |
if (!(req->flags & FLAG_CANCELLED)) |
1088 |
switch (req->type) |
1089 |
{ |
1090 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
1091 |
case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
1092 |
|
1093 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
1094 |
case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break; |
1095 |
|
1096 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
1097 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
1098 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
1099 |
|
1100 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
1101 |
case REQ_CLOSE: req->result = close (req->fd); break; |
1102 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
1103 |
case REQ_RMDIR: req->result = rmdir (req->dataptr); break; |
1104 |
case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break; |
1105 |
case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break; |
1106 |
case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; |
1107 |
case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break; |
1108 |
|
1109 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
1110 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
1111 |
case REQ_READDIR: scandir_ (req, self); break; |
1112 |
|
1113 |
case REQ_BUSY: |
1114 |
{ |
1115 |
struct timeval tv; |
1116 |
|
1117 |
tv.tv_sec = req->fd; |
1118 |
tv.tv_usec = req->fd2; |
1119 |
|
1120 |
req->result = select (0, 0, 0, 0, &tv); |
1121 |
} |
1122 |
|
1123 |
case REQ_GROUP: |
1124 |
case REQ_NOP: |
1125 |
break; |
1126 |
|
1127 |
case REQ_QUIT: |
1128 |
goto quit; |
1129 |
|
1130 |
default: |
1131 |
req->result = ENOSYS; |
1132 |
break; |
1133 |
} |
1134 |
|
1135 |
req->errorno = errno; |
1136 |
|
1137 |
LOCK (reslock); |
1138 |
|
1139 |
++npending; |
1140 |
|
1141 |
if (!reqq_push (&res_queue, req)) |
1142 |
/* write a dummy byte to the pipe so fh becomes ready */ |
1143 |
write (respipe [1], &respipe, 1); |
1144 |
|
1145 |
self->req = 0; |
1146 |
worker_clear (self); |
1147 |
|
1148 |
UNLOCK (reslock); |
1149 |
} |
1150 |
|
1151 |
quit: |
1152 |
LOCK (wrklock); |
1153 |
worker_free (self); |
1154 |
UNLOCK (wrklock); |
1155 |
|
1156 |
return 0; |
1157 |
} |
1158 |
|
1159 |
/*****************************************************************************/ |
1160 |
|
1161 |
static void atfork_prepare (void) |
1162 |
{ |
1163 |
LOCK (wrklock); |
1164 |
LOCK (reqlock); |
1165 |
LOCK (reslock); |
1166 |
#if !HAVE_PREADWRITE |
1167 |
LOCK (preadwritelock); |
1168 |
#endif |
1169 |
#if !HAVE_READDIR_R |
1170 |
LOCK (readdirlock); |
1171 |
#endif |
1172 |
} |
1173 |
|
1174 |
static void atfork_parent (void) |
1175 |
{ |
1176 |
#if !HAVE_READDIR_R |
1177 |
UNLOCK (readdirlock); |
1178 |
#endif |
1179 |
#if !HAVE_PREADWRITE |
1180 |
UNLOCK (preadwritelock); |
1181 |
#endif |
1182 |
UNLOCK (reslock); |
1183 |
UNLOCK (reqlock); |
1184 |
UNLOCK (wrklock); |
1185 |
} |
1186 |
|
1187 |
static void atfork_child (void) |
1188 |
{ |
1189 |
aio_req prv; |
1190 |
|
1191 |
while (prv = reqq_shift (&req_queue)) |
1192 |
req_free (prv); |
1193 |
|
1194 |
while (prv = reqq_shift (&res_queue)) |
1195 |
req_free (prv); |
1196 |
|
1197 |
while (wrk_first.next != &wrk_first) |
1198 |
{ |
1199 |
worker *wrk = wrk_first.next; |
1200 |
|
1201 |
if (wrk->req) |
1202 |
req_free (wrk->req); |
1203 |
|
1204 |
worker_clear (wrk); |
1205 |
worker_free (wrk); |
1206 |
} |
1207 |
|
1208 |
started = 0; |
1209 |
idle = 0; |
1210 |
nreqs = 0; |
1211 |
nready = 0; |
1212 |
npending = 0; |
1213 |
|
1214 |
close (respipe [0]); |
1215 |
close (respipe [1]); |
1216 |
create_pipe (); |
1217 |
|
1218 |
atfork_parent (); |
1219 |
} |
1220 |
|
1221 |
#define dREQ \ |
1222 |
aio_req req; \ |
1223 |
int req_pri = next_pri; \ |
1224 |
next_pri = DEFAULT_PRI + PRI_BIAS; \ |
1225 |
\ |
1226 |
if (SvOK (callback) && !SvROK (callback)) \ |
1227 |
croak ("callback must be undef or of reference type"); \ |
1228 |
\ |
1229 |
Newz (0, req, 1, aio_cb); \ |
1230 |
if (!req) \ |
1231 |
croak ("out of memory during aio_req allocation"); \ |
1232 |
\ |
1233 |
req->callback = newSVsv (callback); \ |
1234 |
req->pri = req_pri |
1235 |
|
1236 |
#define REQ_SEND \ |
1237 |
req_send (req); \ |
1238 |
\ |
1239 |
if (GIMME_V != G_VOID) \ |
1240 |
XPUSHs (req_sv (req, AIO_REQ_KLASS)); |
1241 |
|
1242 |
MODULE = IO::AIO PACKAGE = IO::AIO |
1243 |
|
1244 |
PROTOTYPES: ENABLE |
1245 |
|
1246 |
BOOT: |
1247 |
{ |
1248 |
HV *stash = gv_stashpv ("IO::AIO", 1); |
1249 |
|
1250 |
newCONSTSUB (stash, "EXDEV", newSViv (EXDEV)); |
1251 |
newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY)); |
1252 |
newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY)); |
1253 |
newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT)); |
1254 |
newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC)); |
1255 |
newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO)); |
1256 |
|
1257 |
create_pipe (); |
1258 |
pthread_atfork (atfork_prepare, atfork_parent, atfork_child); |
1259 |
} |
1260 |
|
1261 |
void |
1262 |
max_poll_reqs (int nreqs) |
1263 |
PROTOTYPE: $ |
1264 |
CODE: |
1265 |
max_poll_reqs = nreqs; |
1266 |
|
1267 |
void |
1268 |
max_poll_time (double nseconds) |
1269 |
PROTOTYPE: $ |
1270 |
CODE: |
1271 |
max_poll_time = nseconds * AIO_TICKS; |
1272 |
|
1273 |
void |
1274 |
min_parallel (int nthreads) |
1275 |
PROTOTYPE: $ |
1276 |
|
1277 |
void |
1278 |
max_parallel (int nthreads) |
1279 |
PROTOTYPE: $ |
1280 |
|
1281 |
void |
1282 |
max_idle (int nthreads) |
1283 |
PROTOTYPE: $ |
1284 |
CODE: |
1285 |
set_max_idle (nthreads); |
1286 |
|
1287 |
int |
1288 |
max_outstanding (int maxreqs) |
1289 |
PROTOTYPE: $ |
1290 |
CODE: |
1291 |
RETVAL = max_outstanding; |
1292 |
max_outstanding = maxreqs; |
1293 |
OUTPUT: |
1294 |
RETVAL |
1295 |
|
1296 |
void |
1297 |
aio_open (pathname,flags,mode,callback=&PL_sv_undef) |
1298 |
SV * pathname |
1299 |
int flags |
1300 |
int mode |
1301 |
SV * callback |
1302 |
PROTOTYPE: $$$;$ |
1303 |
PPCODE: |
1304 |
{ |
1305 |
dREQ; |
1306 |
|
1307 |
req->type = REQ_OPEN; |
1308 |
req->data = newSVsv (pathname); |
1309 |
req->dataptr = SvPVbyte_nolen (req->data); |
1310 |
req->fd = flags; |
1311 |
req->mode = mode; |
1312 |
|
1313 |
REQ_SEND; |
1314 |
} |
1315 |
|
1316 |
void |
1317 |
aio_close (fh,callback=&PL_sv_undef) |
1318 |
SV * fh |
1319 |
SV * callback |
1320 |
PROTOTYPE: $;$ |
1321 |
ALIAS: |
1322 |
aio_close = REQ_CLOSE |
1323 |
aio_fsync = REQ_FSYNC |
1324 |
aio_fdatasync = REQ_FDATASYNC |
1325 |
PPCODE: |
1326 |
{ |
1327 |
dREQ; |
1328 |
|
1329 |
req->type = ix; |
1330 |
req->fh = newSVsv (fh); |
1331 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
1332 |
|
1333 |
REQ_SEND (req); |
1334 |
} |
1335 |
|
1336 |
void |
1337 |
aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
1338 |
SV * fh |
1339 |
UV offset |
1340 |
UV length |
1341 |
SV * data |
1342 |
UV dataoffset |
1343 |
SV * callback |
1344 |
ALIAS: |
1345 |
aio_read = REQ_READ |
1346 |
aio_write = REQ_WRITE |
1347 |
PROTOTYPE: $$$$$;$ |
1348 |
PPCODE: |
1349 |
{ |
1350 |
aio_req req; |
1351 |
STRLEN svlen; |
1352 |
char *svptr = SvPVbyte (data, svlen); |
1353 |
|
1354 |
SvUPGRADE (data, SVt_PV); |
1355 |
SvPOK_on (data); |
1356 |
|
1357 |
if (dataoffset < 0) |
1358 |
dataoffset += svlen; |
1359 |
|
1360 |
if (dataoffset < 0 || dataoffset > svlen) |
1361 |
croak ("data offset outside of string"); |
1362 |
|
1363 |
if (ix == REQ_WRITE) |
1364 |
{ |
1365 |
/* write: check length and adjust. */ |
1366 |
if (length < 0 || length + dataoffset > svlen) |
1367 |
length = svlen - dataoffset; |
1368 |
} |
1369 |
else |
1370 |
{ |
1371 |
/* read: grow scalar as necessary */ |
1372 |
svptr = SvGROW (data, length + dataoffset); |
1373 |
} |
1374 |
|
1375 |
if (length < 0) |
1376 |
croak ("length must not be negative"); |
1377 |
|
1378 |
{ |
1379 |
dREQ; |
1380 |
|
1381 |
req->type = ix; |
1382 |
req->fh = newSVsv (fh); |
1383 |
req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
1384 |
: IoOFP (sv_2io (fh))); |
1385 |
req->offset = offset; |
1386 |
req->length = length; |
1387 |
req->data = SvREFCNT_inc (data); |
1388 |
req->dataptr = (char *)svptr + dataoffset; |
1389 |
|
1390 |
if (!SvREADONLY (data)) |
1391 |
{ |
1392 |
SvREADONLY_on (data); |
1393 |
req->data2ptr = (void *)data; |
1394 |
} |
1395 |
|
1396 |
REQ_SEND; |
1397 |
} |
1398 |
} |
1399 |
|
1400 |
void |
1401 |
aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef) |
1402 |
SV * out_fh |
1403 |
SV * in_fh |
1404 |
UV in_offset |
1405 |
UV length |
1406 |
SV * callback |
1407 |
PROTOTYPE: $$$$;$ |
1408 |
PPCODE: |
1409 |
{ |
1410 |
dREQ; |
1411 |
|
1412 |
req->type = REQ_SENDFILE; |
1413 |
req->fh = newSVsv (out_fh); |
1414 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh))); |
1415 |
req->fh2 = newSVsv (in_fh); |
1416 |
req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh))); |
1417 |
req->offset = in_offset; |
1418 |
req->length = length; |
1419 |
|
1420 |
REQ_SEND; |
1421 |
} |
1422 |
|
1423 |
void |
1424 |
aio_readahead (fh,offset,length,callback=&PL_sv_undef) |
1425 |
SV * fh |
1426 |
UV offset |
1427 |
IV length |
1428 |
SV * callback |
1429 |
PROTOTYPE: $$$;$ |
1430 |
PPCODE: |
1431 |
{ |
1432 |
dREQ; |
1433 |
|
1434 |
req->type = REQ_READAHEAD; |
1435 |
req->fh = newSVsv (fh); |
1436 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
1437 |
req->offset = offset; |
1438 |
req->length = length; |
1439 |
|
1440 |
REQ_SEND; |
1441 |
} |
1442 |
|
1443 |
void |
1444 |
aio_stat (fh_or_path,callback=&PL_sv_undef) |
1445 |
SV * fh_or_path |
1446 |
SV * callback |
1447 |
ALIAS: |
1448 |
aio_stat = REQ_STAT |
1449 |
aio_lstat = REQ_LSTAT |
1450 |
PPCODE: |
1451 |
{ |
1452 |
dREQ; |
1453 |
|
1454 |
New (0, req->statdata, 1, Stat_t); |
1455 |
if (!req->statdata) |
1456 |
{ |
1457 |
req_free (req); |
1458 |
croak ("out of memory during aio_req->statdata allocation"); |
1459 |
} |
1460 |
|
1461 |
if (SvPOK (fh_or_path)) |
1462 |
{ |
1463 |
req->type = ix; |
1464 |
req->data = newSVsv (fh_or_path); |
1465 |
req->dataptr = SvPVbyte_nolen (req->data); |
1466 |
} |
1467 |
else |
1468 |
{ |
1469 |
req->type = REQ_FSTAT; |
1470 |
req->fh = newSVsv (fh_or_path); |
1471 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
1472 |
} |
1473 |
|
1474 |
REQ_SEND; |
1475 |
} |
1476 |
|
1477 |
void |
1478 |
aio_unlink (pathname,callback=&PL_sv_undef) |
1479 |
SV * pathname |
1480 |
SV * callback |
1481 |
ALIAS: |
1482 |
aio_unlink = REQ_UNLINK |
1483 |
aio_rmdir = REQ_RMDIR |
1484 |
aio_readdir = REQ_READDIR |
1485 |
PPCODE: |
1486 |
{ |
1487 |
dREQ; |
1488 |
|
1489 |
req->type = ix; |
1490 |
req->data = newSVsv (pathname); |
1491 |
req->dataptr = SvPVbyte_nolen (req->data); |
1492 |
|
1493 |
REQ_SEND; |
1494 |
} |
1495 |
|
1496 |
void |
1497 |
aio_link (oldpath,newpath,callback=&PL_sv_undef) |
1498 |
SV * oldpath |
1499 |
SV * newpath |
1500 |
SV * callback |
1501 |
ALIAS: |
1502 |
aio_link = REQ_LINK |
1503 |
aio_symlink = REQ_SYMLINK |
1504 |
aio_rename = REQ_RENAME |
1505 |
PPCODE: |
1506 |
{ |
1507 |
dREQ; |
1508 |
|
1509 |
req->type = ix; |
1510 |
req->fh = newSVsv (oldpath); |
1511 |
req->data2ptr = SvPVbyte_nolen (req->fh); |
1512 |
req->data = newSVsv (newpath); |
1513 |
req->dataptr = SvPVbyte_nolen (req->data); |
1514 |
|
1515 |
REQ_SEND; |
1516 |
} |
1517 |
|
1518 |
void |
1519 |
aio_mknod (pathname,mode,dev,callback=&PL_sv_undef) |
1520 |
SV * pathname |
1521 |
SV * callback |
1522 |
UV mode |
1523 |
UV dev |
1524 |
PPCODE: |
1525 |
{ |
1526 |
dREQ; |
1527 |
|
1528 |
req->type = REQ_MKNOD; |
1529 |
req->data = newSVsv (pathname); |
1530 |
req->dataptr = SvPVbyte_nolen (req->data); |
1531 |
req->mode = (mode_t)mode; |
1532 |
req->offset = dev; |
1533 |
|
1534 |
REQ_SEND; |
1535 |
} |
1536 |
|
1537 |
void |
1538 |
aio_busy (delay,callback=&PL_sv_undef) |
1539 |
double delay |
1540 |
SV * callback |
1541 |
PPCODE: |
1542 |
{ |
1543 |
dREQ; |
1544 |
|
1545 |
req->type = REQ_BUSY; |
1546 |
req->fd = delay < 0. ? 0 : delay; |
1547 |
req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd); |
1548 |
|
1549 |
REQ_SEND; |
1550 |
} |
1551 |
|
1552 |
void |
1553 |
aio_group (callback=&PL_sv_undef) |
1554 |
SV * callback |
1555 |
PROTOTYPE: ;$ |
1556 |
PPCODE: |
1557 |
{ |
1558 |
dREQ; |
1559 |
|
1560 |
req->type = REQ_GROUP; |
1561 |
req_send (req); |
1562 |
|
1563 |
XPUSHs (req_sv (req, AIO_GRP_KLASS)); |
1564 |
} |
1565 |
|
1566 |
void |
1567 |
aio_nop (callback=&PL_sv_undef) |
1568 |
SV * callback |
1569 |
PPCODE: |
1570 |
{ |
1571 |
dREQ; |
1572 |
|
1573 |
req->type = REQ_NOP; |
1574 |
|
1575 |
REQ_SEND; |
1576 |
} |
1577 |
|
1578 |
int |
1579 |
aioreq_pri (int pri = 0) |
1580 |
PROTOTYPE: ;$ |
1581 |
CODE: |
1582 |
RETVAL = next_pri - PRI_BIAS; |
1583 |
if (items > 0) |
1584 |
{ |
1585 |
if (pri < PRI_MIN) pri = PRI_MIN; |
1586 |
if (pri > PRI_MAX) pri = PRI_MAX; |
1587 |
next_pri = pri + PRI_BIAS; |
1588 |
} |
1589 |
OUTPUT: |
1590 |
RETVAL |
1591 |
|
1592 |
void |
1593 |
aioreq_nice (int nice = 0) |
1594 |
CODE: |
1595 |
nice = next_pri - nice; |
1596 |
if (nice < PRI_MIN) nice = PRI_MIN; |
1597 |
if (nice > PRI_MAX) nice = PRI_MAX; |
1598 |
next_pri = nice + PRI_BIAS; |
1599 |
|
1600 |
void |
1601 |
flush () |
1602 |
PROTOTYPE: |
1603 |
CODE: |
1604 |
while (nreqs) |
1605 |
{ |
1606 |
poll_wait (); |
1607 |
poll_cb (0); |
1608 |
} |
1609 |
|
1610 |
void |
1611 |
poll() |
1612 |
PROTOTYPE: |
1613 |
CODE: |
1614 |
if (nreqs) |
1615 |
{ |
1616 |
poll_wait (); |
1617 |
poll_cb (0); |
1618 |
} |
1619 |
|
1620 |
int |
1621 |
poll_fileno() |
1622 |
PROTOTYPE: |
1623 |
CODE: |
1624 |
RETVAL = respipe [0]; |
1625 |
OUTPUT: |
1626 |
RETVAL |
1627 |
|
1628 |
int |
1629 |
poll_cb(...) |
1630 |
PROTOTYPE: |
1631 |
CODE: |
1632 |
RETVAL = poll_cb (); |
1633 |
OUTPUT: |
1634 |
RETVAL |
1635 |
|
1636 |
void |
1637 |
poll_wait() |
1638 |
PROTOTYPE: |
1639 |
CODE: |
1640 |
if (nreqs) |
1641 |
poll_wait (); |
1642 |
|
1643 |
int |
1644 |
nreqs() |
1645 |
PROTOTYPE: |
1646 |
CODE: |
1647 |
RETVAL = nreqs; |
1648 |
OUTPUT: |
1649 |
RETVAL |
1650 |
|
1651 |
int |
1652 |
nready() |
1653 |
PROTOTYPE: |
1654 |
CODE: |
1655 |
RETVAL = get_nready (); |
1656 |
OUTPUT: |
1657 |
RETVAL |
1658 |
|
1659 |
int |
1660 |
npending() |
1661 |
PROTOTYPE: |
1662 |
CODE: |
1663 |
RETVAL = get_npending (); |
1664 |
OUTPUT: |
1665 |
RETVAL |
1666 |
|
1667 |
int |
1668 |
nthreads() |
1669 |
PROTOTYPE: |
1670 |
CODE: |
1671 |
if (WORDACCESS_UNSAFE) LOCK (wrklock); |
1672 |
RETVAL = started; |
1673 |
if (WORDACCESS_UNSAFE) UNLOCK (wrklock); |
1674 |
OUTPUT: |
1675 |
RETVAL |
1676 |
|
1677 |
PROTOTYPES: DISABLE |
1678 |
|
1679 |
MODULE = IO::AIO PACKAGE = IO::AIO::REQ |
1680 |
|
1681 |
void |
1682 |
cancel (aio_req_ornot req) |
1683 |
CODE: |
1684 |
req_cancel (req); |
1685 |
|
1686 |
void |
1687 |
cb (aio_req_ornot req, SV *callback=&PL_sv_undef) |
1688 |
CODE: |
1689 |
SvREFCNT_dec (req->callback); |
1690 |
req->callback = newSVsv (callback); |
1691 |
|
1692 |
MODULE = IO::AIO PACKAGE = IO::AIO::GRP |
1693 |
|
1694 |
void |
1695 |
add (aio_req grp, ...) |
1696 |
PPCODE: |
1697 |
{ |
1698 |
int i; |
1699 |
aio_req req; |
1700 |
|
1701 |
if (grp->fd == 2) |
1702 |
croak ("cannot add requests to IO::AIO::GRP after the group finished"); |
1703 |
|
1704 |
for (i = 1; i < items; ++i ) |
1705 |
{ |
1706 |
if (GIMME_V != G_VOID) |
1707 |
XPUSHs (sv_2mortal (newSVsv (ST (i)))); |
1708 |
|
1709 |
req = SvAIO_REQ (ST (i)); |
1710 |
|
1711 |
if (req) |
1712 |
{ |
1713 |
++grp->length; |
1714 |
req->grp = grp; |
1715 |
|
1716 |
req->grp_prev = 0; |
1717 |
req->grp_next = grp->grp_first; |
1718 |
|
1719 |
if (grp->grp_first) |
1720 |
grp->grp_first->grp_prev = req; |
1721 |
|
1722 |
grp->grp_first = req; |
1723 |
} |
1724 |
} |
1725 |
} |
1726 |
|
1727 |
void |
1728 |
cancel_subs (aio_req_ornot req) |
1729 |
CODE: |
1730 |
req_cancel_subs (req); |
1731 |
|
1732 |
void |
1733 |
result (aio_req grp, ...) |
1734 |
CODE: |
1735 |
{ |
1736 |
int i; |
1737 |
AV *av; |
1738 |
|
1739 |
grp->errorno = errno; |
1740 |
|
1741 |
av = newAV (); |
1742 |
|
1743 |
for (i = 1; i < items; ++i ) |
1744 |
av_push (av, newSVsv (ST (i))); |
1745 |
|
1746 |
SvREFCNT_dec (grp->data); |
1747 |
grp->data = (SV *)av; |
1748 |
} |
1749 |
|
1750 |
void |
1751 |
errno (aio_req grp, int errorno = errno) |
1752 |
CODE: |
1753 |
grp->errorno = errorno; |
1754 |
|
1755 |
void |
1756 |
limit (aio_req grp, int limit) |
1757 |
CODE: |
1758 |
grp->fd2 = limit; |
1759 |
aio_grp_feed (grp); |
1760 |
|
1761 |
void |
1762 |
feed (aio_req grp, SV *callback=&PL_sv_undef) |
1763 |
CODE: |
1764 |
{ |
1765 |
SvREFCNT_dec (grp->fh2); |
1766 |
grp->fh2 = newSVsv (callback); |
1767 |
|
1768 |
if (grp->fd2 <= 0) |
1769 |
grp->fd2 = 2; |
1770 |
|
1771 |
aio_grp_feed (grp); |
1772 |
} |
1773 |
|