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 |
typedef SV SV8; /* byte-sv, used for argument-checking */ |
93 |
|
94 |
enum { |
95 |
REQ_QUIT, |
96 |
REQ_OPEN, REQ_CLOSE, |
97 |
REQ_READ, REQ_WRITE, REQ_READAHEAD, |
98 |
REQ_SENDFILE, |
99 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, |
100 |
REQ_FSYNC, REQ_FDATASYNC, |
101 |
REQ_UNLINK, REQ_RMDIR, REQ_RENAME, |
102 |
REQ_MKNOD, REQ_READDIR, |
103 |
REQ_LINK, REQ_SYMLINK, REQ_READLINK, |
104 |
REQ_GROUP, REQ_NOP, |
105 |
REQ_BUSY, |
106 |
}; |
107 |
|
108 |
#define AIO_REQ_KLASS "IO::AIO::REQ" |
109 |
#define AIO_GRP_KLASS "IO::AIO::GRP" |
110 |
|
111 |
typedef struct aio_cb |
112 |
{ |
113 |
struct aio_cb *volatile next; |
114 |
|
115 |
SV *callback, *fh; |
116 |
SV *sv1, *sv2; |
117 |
void *ptr1, *ptr2; |
118 |
off_t offs; |
119 |
size_t size; |
120 |
ssize_t result; |
121 |
|
122 |
STRLEN stroffset; |
123 |
int type; |
124 |
int int1, int2; |
125 |
int errorno; |
126 |
mode_t mode; /* open */ |
127 |
|
128 |
unsigned char flags; |
129 |
unsigned char pri; |
130 |
|
131 |
SV *self; /* the perl counterpart of this request, if any */ |
132 |
struct aio_cb *grp, *grp_prev, *grp_next, *grp_first; |
133 |
} aio_cb; |
134 |
|
135 |
enum { |
136 |
FLAG_CANCELLED = 0x01, /* request was cancelled */ |
137 |
FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */ |
138 |
FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */ |
139 |
}; |
140 |
|
141 |
typedef aio_cb *aio_req; |
142 |
typedef aio_cb *aio_req_ornot; |
143 |
|
144 |
enum { |
145 |
PRI_MIN = -4, |
146 |
PRI_MAX = 4, |
147 |
|
148 |
DEFAULT_PRI = 0, |
149 |
PRI_BIAS = -PRI_MIN, |
150 |
NUM_PRI = PRI_MAX + PRI_BIAS + 1, |
151 |
}; |
152 |
|
153 |
#define AIO_TICKS ((1000000 + 1023) >> 10) |
154 |
|
155 |
static unsigned int max_poll_time = 0; |
156 |
static unsigned int max_poll_reqs = 0; |
157 |
|
158 |
/* calculcate time difference in ~1/AIO_TICKS of a second */ |
159 |
static int tvdiff (struct timeval *tv1, struct timeval *tv2) |
160 |
{ |
161 |
return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS |
162 |
+ ((tv2->tv_usec - tv1->tv_usec) >> 10); |
163 |
} |
164 |
|
165 |
static int next_pri = DEFAULT_PRI + PRI_BIAS; |
166 |
|
167 |
static unsigned int started, idle, wanted; |
168 |
|
169 |
#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
170 |
# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
171 |
#else |
172 |
# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER |
173 |
#endif |
174 |
|
175 |
#define LOCK(mutex) pthread_mutex_lock (&(mutex)) |
176 |
#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex)) |
177 |
|
178 |
/* worker threads management */ |
179 |
static pthread_mutex_t wrklock = AIO_MUTEX_INIT; |
180 |
|
181 |
typedef struct worker { |
182 |
/* locked by wrklock */ |
183 |
struct worker *prev, *next; |
184 |
|
185 |
pthread_t tid; |
186 |
|
187 |
/* locked by reslock, reqlock or wrklock */ |
188 |
aio_req req; /* currently processed request */ |
189 |
void *dbuf; |
190 |
DIR *dirp; |
191 |
} worker; |
192 |
|
193 |
static worker wrk_first = { &wrk_first, &wrk_first, 0 }; |
194 |
|
195 |
static void worker_clear (worker *wrk) |
196 |
{ |
197 |
if (wrk->dirp) |
198 |
{ |
199 |
closedir (wrk->dirp); |
200 |
wrk->dirp = 0; |
201 |
} |
202 |
|
203 |
if (wrk->dbuf) |
204 |
{ |
205 |
free (wrk->dbuf); |
206 |
wrk->dbuf = 0; |
207 |
} |
208 |
} |
209 |
|
210 |
static void worker_free (worker *wrk) |
211 |
{ |
212 |
wrk->next->prev = wrk->prev; |
213 |
wrk->prev->next = wrk->next; |
214 |
|
215 |
free (wrk); |
216 |
} |
217 |
|
218 |
static volatile unsigned int nreqs, nready, npending; |
219 |
static volatile unsigned int max_idle = 4; |
220 |
static volatile unsigned int max_outstanding = 0xffffffff; |
221 |
static int respipe [2]; |
222 |
|
223 |
static pthread_mutex_t reslock = AIO_MUTEX_INIT; |
224 |
static pthread_mutex_t reqlock = AIO_MUTEX_INIT; |
225 |
static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
226 |
|
227 |
#if WORDACCESS_UNSAFE |
228 |
|
229 |
static unsigned int get_nready () |
230 |
{ |
231 |
unsigned int retval; |
232 |
|
233 |
LOCK (reqlock); |
234 |
retval = nready; |
235 |
UNLOCK (reqlock); |
236 |
|
237 |
return retval; |
238 |
} |
239 |
|
240 |
static unsigned int get_npending () |
241 |
{ |
242 |
unsigned int retval; |
243 |
|
244 |
LOCK (reslock); |
245 |
retval = npending; |
246 |
UNLOCK (reslock); |
247 |
|
248 |
return retval; |
249 |
} |
250 |
|
251 |
static unsigned int get_nthreads () |
252 |
{ |
253 |
unsigned int retval; |
254 |
|
255 |
LOCK (wrklock); |
256 |
retval = started; |
257 |
UNLOCK (wrklock); |
258 |
|
259 |
return retval; |
260 |
} |
261 |
|
262 |
#else |
263 |
|
264 |
# define get_nready() nready |
265 |
# define get_npending() npending |
266 |
# define get_nthreads() started |
267 |
|
268 |
#endif |
269 |
|
270 |
/* |
271 |
* a somewhat faster data structure might be nice, but |
272 |
* with 8 priorities this actually needs <20 insns |
273 |
* per shift, the most expensive operation. |
274 |
*/ |
275 |
typedef struct { |
276 |
aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */ |
277 |
int size; |
278 |
} reqq; |
279 |
|
280 |
static reqq req_queue; |
281 |
static reqq res_queue; |
282 |
|
283 |
int reqq_push (reqq *q, aio_req req) |
284 |
{ |
285 |
int pri = req->pri; |
286 |
req->next = 0; |
287 |
|
288 |
if (q->qe[pri]) |
289 |
{ |
290 |
q->qe[pri]->next = req; |
291 |
q->qe[pri] = req; |
292 |
} |
293 |
else |
294 |
q->qe[pri] = q->qs[pri] = req; |
295 |
|
296 |
return q->size++; |
297 |
} |
298 |
|
299 |
aio_req reqq_shift (reqq *q) |
300 |
{ |
301 |
int pri; |
302 |
|
303 |
if (!q->size) |
304 |
return 0; |
305 |
|
306 |
--q->size; |
307 |
|
308 |
for (pri = NUM_PRI; pri--; ) |
309 |
{ |
310 |
aio_req req = q->qs[pri]; |
311 |
|
312 |
if (req) |
313 |
{ |
314 |
if (!(q->qs[pri] = req->next)) |
315 |
q->qe[pri] = 0; |
316 |
|
317 |
return req; |
318 |
} |
319 |
} |
320 |
|
321 |
abort (); |
322 |
} |
323 |
|
324 |
static int poll_cb (); |
325 |
static void req_invoke (aio_req req); |
326 |
static void req_free (aio_req req); |
327 |
static void req_cancel (aio_req req); |
328 |
|
329 |
/* must be called at most once */ |
330 |
static SV *req_sv (aio_req req, const char *klass) |
331 |
{ |
332 |
if (!req->self) |
333 |
{ |
334 |
req->self = (SV *)newHV (); |
335 |
sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0); |
336 |
} |
337 |
|
338 |
return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1))); |
339 |
} |
340 |
|
341 |
static aio_req SvAIO_REQ (SV *sv) |
342 |
{ |
343 |
MAGIC *mg; |
344 |
|
345 |
if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv)) |
346 |
croak ("object of class " AIO_REQ_KLASS " expected"); |
347 |
|
348 |
mg = mg_find (SvRV (sv), PERL_MAGIC_ext); |
349 |
|
350 |
return mg ? (aio_req)mg->mg_ptr : 0; |
351 |
} |
352 |
|
353 |
static void aio_grp_feed (aio_req grp) |
354 |
{ |
355 |
while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED)) |
356 |
{ |
357 |
int old_len = grp->size; |
358 |
|
359 |
if (grp->sv2 && SvOK (grp->sv2)) |
360 |
{ |
361 |
dSP; |
362 |
|
363 |
ENTER; |
364 |
SAVETMPS; |
365 |
PUSHMARK (SP); |
366 |
XPUSHs (req_sv (grp, AIO_GRP_KLASS)); |
367 |
PUTBACK; |
368 |
call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR); |
369 |
SPAGAIN; |
370 |
FREETMPS; |
371 |
LEAVE; |
372 |
} |
373 |
|
374 |
/* stop if no progress has been made */ |
375 |
if (old_len == grp->size) |
376 |
{ |
377 |
SvREFCNT_dec (grp->sv2); |
378 |
grp->sv2 = 0; |
379 |
break; |
380 |
} |
381 |
} |
382 |
} |
383 |
|
384 |
static void aio_grp_dec (aio_req grp) |
385 |
{ |
386 |
--grp->size; |
387 |
|
388 |
/* call feeder, if applicable */ |
389 |
aio_grp_feed (grp); |
390 |
|
391 |
/* finish, if done */ |
392 |
if (!grp->size && grp->int1) |
393 |
{ |
394 |
req_invoke (grp); |
395 |
req_free (grp); |
396 |
} |
397 |
} |
398 |
|
399 |
static void req_invoke (aio_req req) |
400 |
{ |
401 |
dSP; |
402 |
|
403 |
if (req->flags & FLAG_SV1_RO_OFF) |
404 |
SvREADONLY_off (req->sv1); |
405 |
|
406 |
if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback)) |
407 |
{ |
408 |
ENTER; |
409 |
SAVETMPS; |
410 |
PUSHMARK (SP); |
411 |
EXTEND (SP, 1); |
412 |
|
413 |
switch (req->type) |
414 |
{ |
415 |
case REQ_READDIR: |
416 |
{ |
417 |
SV *rv = &PL_sv_undef; |
418 |
|
419 |
if (req->result >= 0) |
420 |
{ |
421 |
int i; |
422 |
char *buf = req->ptr2; |
423 |
AV *av = newAV (); |
424 |
|
425 |
av_extend (av, req->result - 1); |
426 |
|
427 |
for (i = 0; i < req->result; ++i) |
428 |
{ |
429 |
SV *sv = newSVpv (buf, 0); |
430 |
|
431 |
av_store (av, i, sv); |
432 |
buf += SvCUR (sv) + 1; |
433 |
} |
434 |
|
435 |
rv = sv_2mortal (newRV_noinc ((SV *)av)); |
436 |
} |
437 |
|
438 |
PUSHs (rv); |
439 |
} |
440 |
break; |
441 |
|
442 |
case REQ_OPEN: |
443 |
{ |
444 |
/* convert fd to fh */ |
445 |
SV *fh; |
446 |
|
447 |
PUSHs (sv_2mortal (newSViv (req->result))); |
448 |
PUTBACK; |
449 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
450 |
SPAGAIN; |
451 |
|
452 |
fh = POPs; |
453 |
PUSHMARK (SP); |
454 |
XPUSHs (fh); |
455 |
} |
456 |
break; |
457 |
|
458 |
case REQ_GROUP: |
459 |
req->int1 = 2; /* mark group as finished */ |
460 |
|
461 |
if (req->sv1) |
462 |
{ |
463 |
int i; |
464 |
AV *av = (AV *)req->sv1; |
465 |
|
466 |
EXTEND (SP, AvFILL (av) + 1); |
467 |
for (i = 0; i <= AvFILL (av); ++i) |
468 |
PUSHs (*av_fetch (av, i, 0)); |
469 |
} |
470 |
break; |
471 |
|
472 |
case REQ_NOP: |
473 |
case REQ_BUSY: |
474 |
break; |
475 |
|
476 |
case REQ_READLINK: |
477 |
if (req->result > 0) |
478 |
{ |
479 |
SvCUR_set (req->sv1, req->result); |
480 |
*SvEND (req->sv1) = 0; |
481 |
PUSHs (req->sv1); |
482 |
} |
483 |
break; |
484 |
|
485 |
case REQ_STAT: |
486 |
case REQ_LSTAT: |
487 |
case REQ_FSTAT: |
488 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
489 |
PL_laststatval = req->result; |
490 |
PL_statcache = *(Stat_t *)(req->ptr2); |
491 |
PUSHs (sv_2mortal (newSViv (req->result))); |
492 |
break; |
493 |
|
494 |
case REQ_READ: |
495 |
SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0)); |
496 |
*SvEND (req->sv1) = 0; |
497 |
PUSHs (sv_2mortal (newSViv (req->result))); |
498 |
break; |
499 |
|
500 |
default: |
501 |
PUSHs (sv_2mortal (newSViv (req->result))); |
502 |
break; |
503 |
} |
504 |
|
505 |
errno = req->errorno; |
506 |
|
507 |
PUTBACK; |
508 |
call_sv (req->callback, G_VOID | G_EVAL); |
509 |
SPAGAIN; |
510 |
|
511 |
FREETMPS; |
512 |
LEAVE; |
513 |
} |
514 |
|
515 |
if (req->grp) |
516 |
{ |
517 |
aio_req grp = req->grp; |
518 |
|
519 |
/* unlink request */ |
520 |
if (req->grp_next) req->grp_next->grp_prev = req->grp_prev; |
521 |
if (req->grp_prev) req->grp_prev->grp_next = req->grp_next; |
522 |
|
523 |
if (grp->grp_first == req) |
524 |
grp->grp_first = req->grp_next; |
525 |
|
526 |
aio_grp_dec (grp); |
527 |
} |
528 |
|
529 |
if (SvTRUE (ERRSV)) |
530 |
{ |
531 |
req_free (req); |
532 |
croak (0); |
533 |
} |
534 |
} |
535 |
|
536 |
static void req_free (aio_req req) |
537 |
{ |
538 |
if (req->self) |
539 |
{ |
540 |
sv_unmagic (req->self, PERL_MAGIC_ext); |
541 |
SvREFCNT_dec (req->self); |
542 |
} |
543 |
|
544 |
SvREFCNT_dec (req->fh); |
545 |
SvREFCNT_dec (req->sv1); |
546 |
SvREFCNT_dec (req->sv2); |
547 |
SvREFCNT_dec (req->callback); |
548 |
|
549 |
if (req->flags & FLAG_PTR2_FREE) |
550 |
free (req->ptr2); |
551 |
|
552 |
Safefree (req); |
553 |
} |
554 |
|
555 |
static void req_cancel_subs (aio_req grp) |
556 |
{ |
557 |
aio_req sub; |
558 |
|
559 |
if (grp->type != REQ_GROUP) |
560 |
return; |
561 |
|
562 |
SvREFCNT_dec (grp->sv2); |
563 |
grp->sv2 = 0; |
564 |
|
565 |
for (sub = grp->grp_first; sub; sub = sub->grp_next) |
566 |
req_cancel (sub); |
567 |
} |
568 |
|
569 |
static void req_cancel (aio_req req) |
570 |
{ |
571 |
req->flags |= FLAG_CANCELLED; |
572 |
|
573 |
req_cancel_subs (req); |
574 |
} |
575 |
|
576 |
static void *aio_proc(void *arg); |
577 |
|
578 |
static void start_thread (void) |
579 |
{ |
580 |
sigset_t fullsigset, oldsigset; |
581 |
pthread_attr_t attr; |
582 |
|
583 |
worker *wrk = calloc (1, sizeof (worker)); |
584 |
|
585 |
if (!wrk) |
586 |
croak ("unable to allocate worker thread data"); |
587 |
|
588 |
pthread_attr_init (&attr); |
589 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
590 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
591 |
#ifdef PTHREAD_SCOPE_PROCESS |
592 |
pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
593 |
#endif |
594 |
|
595 |
sigfillset (&fullsigset); |
596 |
|
597 |
LOCK (wrklock); |
598 |
sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
599 |
|
600 |
if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0) |
601 |
{ |
602 |
wrk->prev = &wrk_first; |
603 |
wrk->next = wrk_first.next; |
604 |
wrk_first.next->prev = wrk; |
605 |
wrk_first.next = wrk; |
606 |
++started; |
607 |
} |
608 |
else |
609 |
free (wrk); |
610 |
|
611 |
sigprocmask (SIG_SETMASK, &oldsigset, 0); |
612 |
UNLOCK (wrklock); |
613 |
} |
614 |
|
615 |
static void maybe_start_thread () |
616 |
{ |
617 |
if (get_nthreads () >= wanted) |
618 |
return; |
619 |
|
620 |
/* todo: maybe use idle here, but might be less exact */ |
621 |
if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs) |
622 |
return; |
623 |
|
624 |
start_thread (); |
625 |
} |
626 |
|
627 |
static void req_send (aio_req req) |
628 |
{ |
629 |
++nreqs; |
630 |
|
631 |
LOCK (reqlock); |
632 |
++nready; |
633 |
reqq_push (&req_queue, req); |
634 |
pthread_cond_signal (&reqwait); |
635 |
UNLOCK (reqlock); |
636 |
|
637 |
maybe_start_thread (); |
638 |
} |
639 |
|
640 |
static void end_thread (void) |
641 |
{ |
642 |
aio_req req; |
643 |
|
644 |
Newz (0, req, 1, aio_cb); |
645 |
|
646 |
req->type = REQ_QUIT; |
647 |
req->pri = PRI_MAX + PRI_BIAS; |
648 |
|
649 |
LOCK (reqlock); |
650 |
reqq_push (&req_queue, req); |
651 |
pthread_cond_signal (&reqwait); |
652 |
UNLOCK (reqlock); |
653 |
|
654 |
LOCK (wrklock); |
655 |
--started; |
656 |
UNLOCK (wrklock); |
657 |
} |
658 |
|
659 |
static void set_max_idle (int nthreads) |
660 |
{ |
661 |
if (WORDACCESS_UNSAFE) LOCK (reqlock); |
662 |
max_idle = nthreads <= 0 ? 1 : nthreads; |
663 |
if (WORDACCESS_UNSAFE) UNLOCK (reqlock); |
664 |
} |
665 |
|
666 |
static void min_parallel (int nthreads) |
667 |
{ |
668 |
if (wanted < nthreads) |
669 |
wanted = nthreads; |
670 |
} |
671 |
|
672 |
static void max_parallel (int nthreads) |
673 |
{ |
674 |
if (wanted > nthreads) |
675 |
wanted = nthreads; |
676 |
|
677 |
while (started > wanted) |
678 |
end_thread (); |
679 |
} |
680 |
|
681 |
static void poll_wait () |
682 |
{ |
683 |
fd_set rfd; |
684 |
|
685 |
while (nreqs) |
686 |
{ |
687 |
int size; |
688 |
if (WORDACCESS_UNSAFE) LOCK (reslock); |
689 |
size = res_queue.size; |
690 |
if (WORDACCESS_UNSAFE) UNLOCK (reslock); |
691 |
|
692 |
if (size) |
693 |
return; |
694 |
|
695 |
maybe_start_thread (); |
696 |
|
697 |
FD_ZERO(&rfd); |
698 |
FD_SET(respipe [0], &rfd); |
699 |
|
700 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
701 |
} |
702 |
} |
703 |
|
704 |
static int poll_cb () |
705 |
{ |
706 |
dSP; |
707 |
int count = 0; |
708 |
int maxreqs = max_poll_reqs; |
709 |
int do_croak = 0; |
710 |
struct timeval tv_start, tv_now; |
711 |
aio_req req; |
712 |
|
713 |
if (max_poll_time) |
714 |
gettimeofday (&tv_start, 0); |
715 |
|
716 |
for (;;) |
717 |
{ |
718 |
for (;;) |
719 |
{ |
720 |
maybe_start_thread (); |
721 |
|
722 |
LOCK (reslock); |
723 |
req = reqq_shift (&res_queue); |
724 |
|
725 |
if (req) |
726 |
{ |
727 |
--npending; |
728 |
|
729 |
if (!res_queue.size) |
730 |
{ |
731 |
/* read any signals sent by the worker threads */ |
732 |
char buf [32]; |
733 |
while (read (respipe [0], buf, 32) == 32) |
734 |
; |
735 |
} |
736 |
} |
737 |
|
738 |
UNLOCK (reslock); |
739 |
|
740 |
if (!req) |
741 |
break; |
742 |
|
743 |
--nreqs; |
744 |
|
745 |
if (req->type == REQ_GROUP && req->size) |
746 |
{ |
747 |
req->int1 = 1; /* mark request as delayed */ |
748 |
continue; |
749 |
} |
750 |
else |
751 |
{ |
752 |
req_invoke (req); |
753 |
|
754 |
count++; |
755 |
} |
756 |
|
757 |
req_free (req); |
758 |
|
759 |
if (maxreqs && !--maxreqs) |
760 |
break; |
761 |
|
762 |
if (max_poll_time) |
763 |
{ |
764 |
gettimeofday (&tv_now, 0); |
765 |
|
766 |
if (tvdiff (&tv_start, &tv_now) >= max_poll_time) |
767 |
break; |
768 |
} |
769 |
} |
770 |
|
771 |
if (nreqs <= max_outstanding) |
772 |
break; |
773 |
|
774 |
poll_wait (); |
775 |
|
776 |
++maxreqs; |
777 |
} |
778 |
|
779 |
return count; |
780 |
} |
781 |
|
782 |
static void create_pipe () |
783 |
{ |
784 |
if (pipe (respipe)) |
785 |
croak ("unable to initialize result pipe"); |
786 |
|
787 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
788 |
croak ("cannot set result pipe to nonblocking mode"); |
789 |
|
790 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
791 |
croak ("cannot set result pipe to nonblocking mode"); |
792 |
} |
793 |
|
794 |
/*****************************************************************************/ |
795 |
/* work around various missing functions */ |
796 |
|
797 |
#if !HAVE_PREADWRITE |
798 |
# define pread aio_pread |
799 |
# define pwrite aio_pwrite |
800 |
|
801 |
/* |
802 |
* make our pread/pwrite safe against themselves, but not against |
803 |
* normal read/write by using a mutex. slows down execution a lot, |
804 |
* but that's your problem, not mine. |
805 |
*/ |
806 |
static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER; |
807 |
|
808 |
static ssize_t pread (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 = read (fd, buf, count); |
817 |
lseek (fd, ooffset, SEEK_SET); |
818 |
UNLOCK (preadwritelock); |
819 |
|
820 |
return res; |
821 |
} |
822 |
|
823 |
static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset) |
824 |
{ |
825 |
ssize_t res; |
826 |
off_t ooffset; |
827 |
|
828 |
LOCK (preadwritelock); |
829 |
ooffset = lseek (fd, 0, SEEK_CUR); |
830 |
lseek (fd, offset, SEEK_SET); |
831 |
res = write (fd, buf, count); |
832 |
lseek (fd, offset, SEEK_SET); |
833 |
UNLOCK (preadwritelock); |
834 |
|
835 |
return res; |
836 |
} |
837 |
#endif |
838 |
|
839 |
#if !HAVE_FDATASYNC |
840 |
# define fdatasync fsync |
841 |
#endif |
842 |
|
843 |
#if !HAVE_READAHEAD |
844 |
# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self) |
845 |
|
846 |
static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self) |
847 |
{ |
848 |
dBUF; |
849 |
|
850 |
while (count > 0) |
851 |
{ |
852 |
size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE; |
853 |
|
854 |
pread (fd, aio_buf, len, offset); |
855 |
offset += len; |
856 |
count -= len; |
857 |
} |
858 |
|
859 |
errno = 0; |
860 |
} |
861 |
|
862 |
#endif |
863 |
|
864 |
#if !HAVE_READDIR_R |
865 |
# define readdir_r aio_readdir_r |
866 |
|
867 |
static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER; |
868 |
|
869 |
static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res) |
870 |
{ |
871 |
struct dirent *e; |
872 |
int errorno; |
873 |
|
874 |
LOCK (readdirlock); |
875 |
|
876 |
e = readdir (dirp); |
877 |
errorno = errno; |
878 |
|
879 |
if (e) |
880 |
{ |
881 |
*res = ent; |
882 |
strcpy (ent->d_name, e->d_name); |
883 |
} |
884 |
else |
885 |
*res = 0; |
886 |
|
887 |
UNLOCK (readdirlock); |
888 |
|
889 |
errno = errorno; |
890 |
return e ? 0 : -1; |
891 |
} |
892 |
#endif |
893 |
|
894 |
/* sendfile always needs emulation */ |
895 |
static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self) |
896 |
{ |
897 |
ssize_t res; |
898 |
|
899 |
if (!count) |
900 |
return 0; |
901 |
|
902 |
#if HAVE_SENDFILE |
903 |
# if __linux |
904 |
res = sendfile (ofd, ifd, &offset, count); |
905 |
|
906 |
# elif __freebsd |
907 |
/* |
908 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
909 |
* wasted on making it similar to other I/O functions. |
910 |
*/ |
911 |
{ |
912 |
off_t sbytes; |
913 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
914 |
|
915 |
if (res < 0 && sbytes) |
916 |
/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */ |
917 |
res = sbytes; |
918 |
} |
919 |
|
920 |
# elif __hpux |
921 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
922 |
|
923 |
# elif __solaris |
924 |
{ |
925 |
struct sendfilevec vec; |
926 |
size_t sbytes; |
927 |
|
928 |
vec.sfv_fd = ifd; |
929 |
vec.sfv_flag = 0; |
930 |
vec.sfv_off = offset; |
931 |
vec.sfv_len = count; |
932 |
|
933 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
934 |
|
935 |
if (res < 0 && sbytes) |
936 |
res = sbytes; |
937 |
} |
938 |
|
939 |
# endif |
940 |
#else |
941 |
res = -1; |
942 |
errno = ENOSYS; |
943 |
#endif |
944 |
|
945 |
if (res < 0 |
946 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
947 |
#if __solaris |
948 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
949 |
#endif |
950 |
) |
951 |
) |
952 |
{ |
953 |
/* emulate sendfile. this is a major pain in the ass */ |
954 |
dBUF; |
955 |
|
956 |
res = 0; |
957 |
|
958 |
while (count) |
959 |
{ |
960 |
ssize_t cnt; |
961 |
|
962 |
cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset); |
963 |
|
964 |
if (cnt <= 0) |
965 |
{ |
966 |
if (cnt && !res) res = -1; |
967 |
break; |
968 |
} |
969 |
|
970 |
cnt = write (ofd, aio_buf, cnt); |
971 |
|
972 |
if (cnt <= 0) |
973 |
{ |
974 |
if (cnt && !res) res = -1; |
975 |
break; |
976 |
} |
977 |
|
978 |
offset += cnt; |
979 |
res += cnt; |
980 |
count -= cnt; |
981 |
} |
982 |
} |
983 |
|
984 |
return res; |
985 |
} |
986 |
|
987 |
/* read a full directory */ |
988 |
static void scandir_ (aio_req req, worker *self) |
989 |
{ |
990 |
DIR *dirp; |
991 |
union |
992 |
{ |
993 |
struct dirent d; |
994 |
char b [offsetof (struct dirent, d_name) + NAME_MAX + 1]; |
995 |
} *u; |
996 |
struct dirent *entp; |
997 |
char *name, *names; |
998 |
int memlen = 4096; |
999 |
int memofs = 0; |
1000 |
int res = 0; |
1001 |
int errorno; |
1002 |
|
1003 |
LOCK (wrklock); |
1004 |
self->dirp = dirp = opendir (req->ptr1); |
1005 |
self->dbuf = u = malloc (sizeof (*u)); |
1006 |
req->flags |= FLAG_PTR2_FREE; |
1007 |
req->ptr2 = names = malloc (memlen); |
1008 |
UNLOCK (wrklock); |
1009 |
|
1010 |
if (dirp && u && names) |
1011 |
for (;;) |
1012 |
{ |
1013 |
errno = 0; |
1014 |
readdir_r (dirp, &u->d, &entp); |
1015 |
|
1016 |
if (!entp) |
1017 |
break; |
1018 |
|
1019 |
name = entp->d_name; |
1020 |
|
1021 |
if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
1022 |
{ |
1023 |
int len = strlen (name) + 1; |
1024 |
|
1025 |
res++; |
1026 |
|
1027 |
while (memofs + len > memlen) |
1028 |
{ |
1029 |
memlen *= 2; |
1030 |
LOCK (wrklock); |
1031 |
req->ptr2 = names = realloc (names, memlen); |
1032 |
UNLOCK (wrklock); |
1033 |
|
1034 |
if (!names) |
1035 |
break; |
1036 |
} |
1037 |
|
1038 |
memcpy (names + memofs, name, len); |
1039 |
memofs += len; |
1040 |
} |
1041 |
} |
1042 |
|
1043 |
if (errno) |
1044 |
res = -1; |
1045 |
|
1046 |
req->result = res; |
1047 |
} |
1048 |
|
1049 |
/*****************************************************************************/ |
1050 |
|
1051 |
static void *aio_proc (void *thr_arg) |
1052 |
{ |
1053 |
aio_req req; |
1054 |
struct timespec ts; |
1055 |
worker *self = (worker *)thr_arg; |
1056 |
|
1057 |
/* try to distribute timeouts somewhat evenly */ |
1058 |
ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL) |
1059 |
* (1000000000UL / 1024UL); |
1060 |
|
1061 |
for (;;) |
1062 |
{ |
1063 |
ts.tv_sec = time (0) + IDLE_TIMEOUT; |
1064 |
|
1065 |
LOCK (reqlock); |
1066 |
|
1067 |
for (;;) |
1068 |
{ |
1069 |
self->req = req = reqq_shift (&req_queue); |
1070 |
|
1071 |
if (req) |
1072 |
break; |
1073 |
|
1074 |
++idle; |
1075 |
|
1076 |
if (pthread_cond_timedwait (&reqwait, &reqlock, &ts) |
1077 |
== ETIMEDOUT) |
1078 |
{ |
1079 |
if (idle > max_idle) |
1080 |
{ |
1081 |
--idle; |
1082 |
UNLOCK (reqlock); |
1083 |
LOCK (wrklock); |
1084 |
--started; |
1085 |
UNLOCK (wrklock); |
1086 |
goto quit; |
1087 |
} |
1088 |
|
1089 |
/* we are allowed to idle, so do so without any timeout */ |
1090 |
pthread_cond_wait (&reqwait, &reqlock); |
1091 |
ts.tv_sec = time (0) + IDLE_TIMEOUT; |
1092 |
} |
1093 |
|
1094 |
--idle; |
1095 |
} |
1096 |
|
1097 |
--nready; |
1098 |
|
1099 |
UNLOCK (reqlock); |
1100 |
|
1101 |
errno = 0; /* strictly unnecessary */ |
1102 |
|
1103 |
if (!(req->flags & FLAG_CANCELLED)) |
1104 |
switch (req->type) |
1105 |
{ |
1106 |
case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break; |
1107 |
case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break; |
1108 |
|
1109 |
case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break; |
1110 |
case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break; |
1111 |
|
1112 |
case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break; |
1113 |
case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break; |
1114 |
case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break; |
1115 |
|
1116 |
case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break; |
1117 |
case REQ_CLOSE: req->result = close (req->int1); break; |
1118 |
case REQ_UNLINK: req->result = unlink (req->ptr1); break; |
1119 |
case REQ_RMDIR: req->result = rmdir (req->ptr1); break; |
1120 |
case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break; |
1121 |
case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break; |
1122 |
case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break; |
1123 |
case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break; |
1124 |
case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break; |
1125 |
|
1126 |
case REQ_FDATASYNC: req->result = fdatasync (req->int1); break; |
1127 |
case REQ_FSYNC: req->result = fsync (req->int1); break; |
1128 |
case REQ_READDIR: scandir_ (req, self); break; |
1129 |
|
1130 |
case REQ_BUSY: |
1131 |
{ |
1132 |
struct timeval tv; |
1133 |
|
1134 |
tv.tv_sec = req->int1; |
1135 |
tv.tv_usec = req->int2; |
1136 |
|
1137 |
req->result = select (0, 0, 0, 0, &tv); |
1138 |
} |
1139 |
|
1140 |
case REQ_GROUP: |
1141 |
case REQ_NOP: |
1142 |
break; |
1143 |
|
1144 |
case REQ_QUIT: |
1145 |
goto quit; |
1146 |
|
1147 |
default: |
1148 |
req->result = ENOSYS; |
1149 |
break; |
1150 |
} |
1151 |
|
1152 |
req->errorno = errno; |
1153 |
|
1154 |
LOCK (reslock); |
1155 |
|
1156 |
++npending; |
1157 |
|
1158 |
if (!reqq_push (&res_queue, req)) |
1159 |
/* write a dummy byte to the pipe so fh becomes ready */ |
1160 |
write (respipe [1], &respipe, 1); |
1161 |
|
1162 |
self->req = 0; |
1163 |
worker_clear (self); |
1164 |
|
1165 |
UNLOCK (reslock); |
1166 |
} |
1167 |
|
1168 |
quit: |
1169 |
LOCK (wrklock); |
1170 |
worker_free (self); |
1171 |
UNLOCK (wrklock); |
1172 |
|
1173 |
return 0; |
1174 |
} |
1175 |
|
1176 |
/*****************************************************************************/ |
1177 |
|
1178 |
static void atfork_prepare (void) |
1179 |
{ |
1180 |
LOCK (wrklock); |
1181 |
LOCK (reqlock); |
1182 |
LOCK (reslock); |
1183 |
#if !HAVE_PREADWRITE |
1184 |
LOCK (preadwritelock); |
1185 |
#endif |
1186 |
#if !HAVE_READDIR_R |
1187 |
LOCK (readdirlock); |
1188 |
#endif |
1189 |
} |
1190 |
|
1191 |
static void atfork_parent (void) |
1192 |
{ |
1193 |
#if !HAVE_READDIR_R |
1194 |
UNLOCK (readdirlock); |
1195 |
#endif |
1196 |
#if !HAVE_PREADWRITE |
1197 |
UNLOCK (preadwritelock); |
1198 |
#endif |
1199 |
UNLOCK (reslock); |
1200 |
UNLOCK (reqlock); |
1201 |
UNLOCK (wrklock); |
1202 |
} |
1203 |
|
1204 |
static void atfork_child (void) |
1205 |
{ |
1206 |
aio_req prv; |
1207 |
|
1208 |
while (prv = reqq_shift (&req_queue)) |
1209 |
req_free (prv); |
1210 |
|
1211 |
while (prv = reqq_shift (&res_queue)) |
1212 |
req_free (prv); |
1213 |
|
1214 |
while (wrk_first.next != &wrk_first) |
1215 |
{ |
1216 |
worker *wrk = wrk_first.next; |
1217 |
|
1218 |
if (wrk->req) |
1219 |
req_free (wrk->req); |
1220 |
|
1221 |
worker_clear (wrk); |
1222 |
worker_free (wrk); |
1223 |
} |
1224 |
|
1225 |
started = 0; |
1226 |
idle = 0; |
1227 |
nreqs = 0; |
1228 |
nready = 0; |
1229 |
npending = 0; |
1230 |
|
1231 |
close (respipe [0]); |
1232 |
close (respipe [1]); |
1233 |
create_pipe (); |
1234 |
|
1235 |
atfork_parent (); |
1236 |
} |
1237 |
|
1238 |
#define dREQ \ |
1239 |
aio_req req; \ |
1240 |
int req_pri = next_pri; \ |
1241 |
next_pri = DEFAULT_PRI + PRI_BIAS; \ |
1242 |
\ |
1243 |
if (SvOK (callback) && !SvROK (callback)) \ |
1244 |
croak ("callback must be undef or of reference type"); \ |
1245 |
\ |
1246 |
Newz (0, req, 1, aio_cb); \ |
1247 |
if (!req) \ |
1248 |
croak ("out of memory during aio_req allocation"); \ |
1249 |
\ |
1250 |
req->callback = newSVsv (callback); \ |
1251 |
req->pri = req_pri |
1252 |
|
1253 |
#define REQ_SEND \ |
1254 |
req_send (req); \ |
1255 |
\ |
1256 |
if (GIMME_V != G_VOID) \ |
1257 |
XPUSHs (req_sv (req, AIO_REQ_KLASS)); |
1258 |
|
1259 |
MODULE = IO::AIO PACKAGE = IO::AIO |
1260 |
|
1261 |
PROTOTYPES: ENABLE |
1262 |
|
1263 |
BOOT: |
1264 |
{ |
1265 |
HV *stash = gv_stashpv ("IO::AIO", 1); |
1266 |
|
1267 |
newCONSTSUB (stash, "EXDEV", newSViv (EXDEV)); |
1268 |
newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY)); |
1269 |
newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY)); |
1270 |
newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT)); |
1271 |
newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC)); |
1272 |
newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO)); |
1273 |
|
1274 |
create_pipe (); |
1275 |
pthread_atfork (atfork_prepare, atfork_parent, atfork_child); |
1276 |
} |
1277 |
|
1278 |
void |
1279 |
max_poll_reqs (int nreqs) |
1280 |
PROTOTYPE: $ |
1281 |
CODE: |
1282 |
max_poll_reqs = nreqs; |
1283 |
|
1284 |
void |
1285 |
max_poll_time (double nseconds) |
1286 |
PROTOTYPE: $ |
1287 |
CODE: |
1288 |
max_poll_time = nseconds * AIO_TICKS; |
1289 |
|
1290 |
void |
1291 |
min_parallel (int nthreads) |
1292 |
PROTOTYPE: $ |
1293 |
|
1294 |
void |
1295 |
max_parallel (int nthreads) |
1296 |
PROTOTYPE: $ |
1297 |
|
1298 |
void |
1299 |
max_idle (int nthreads) |
1300 |
PROTOTYPE: $ |
1301 |
CODE: |
1302 |
set_max_idle (nthreads); |
1303 |
|
1304 |
int |
1305 |
max_outstanding (int maxreqs) |
1306 |
PROTOTYPE: $ |
1307 |
CODE: |
1308 |
RETVAL = max_outstanding; |
1309 |
max_outstanding = maxreqs; |
1310 |
OUTPUT: |
1311 |
RETVAL |
1312 |
|
1313 |
void |
1314 |
aio_open (pathname,flags,mode,callback=&PL_sv_undef) |
1315 |
SV8 * pathname |
1316 |
int flags |
1317 |
int mode |
1318 |
SV * callback |
1319 |
PROTOTYPE: $$$;$ |
1320 |
PPCODE: |
1321 |
{ |
1322 |
dREQ; |
1323 |
|
1324 |
req->type = REQ_OPEN; |
1325 |
req->sv1 = newSVsv (pathname); |
1326 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
1327 |
req->int1 = flags; |
1328 |
req->mode = mode; |
1329 |
|
1330 |
REQ_SEND; |
1331 |
} |
1332 |
|
1333 |
void |
1334 |
aio_close (fh,callback=&PL_sv_undef) |
1335 |
SV * fh |
1336 |
SV * callback |
1337 |
PROTOTYPE: $;$ |
1338 |
ALIAS: |
1339 |
aio_close = REQ_CLOSE |
1340 |
aio_fsync = REQ_FSYNC |
1341 |
aio_fdatasync = REQ_FDATASYNC |
1342 |
PPCODE: |
1343 |
{ |
1344 |
dREQ; |
1345 |
|
1346 |
req->type = ix; |
1347 |
req->fh = newSVsv (fh); |
1348 |
req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh))); |
1349 |
|
1350 |
REQ_SEND (req); |
1351 |
} |
1352 |
|
1353 |
void |
1354 |
aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
1355 |
SV * fh |
1356 |
UV offset |
1357 |
UV length |
1358 |
SV8 * data |
1359 |
UV dataoffset |
1360 |
SV * callback |
1361 |
ALIAS: |
1362 |
aio_read = REQ_READ |
1363 |
aio_write = REQ_WRITE |
1364 |
PROTOTYPE: $$$$$;$ |
1365 |
PPCODE: |
1366 |
{ |
1367 |
STRLEN svlen; |
1368 |
char *svptr = SvPVbyte (data, svlen); |
1369 |
|
1370 |
SvUPGRADE (data, SVt_PV); |
1371 |
SvPOK_on (data); |
1372 |
|
1373 |
if (dataoffset < 0) |
1374 |
dataoffset += svlen; |
1375 |
|
1376 |
if (dataoffset < 0 || dataoffset > svlen) |
1377 |
croak ("data offset outside of string"); |
1378 |
|
1379 |
if (ix == REQ_WRITE) |
1380 |
{ |
1381 |
/* write: check length and adjust. */ |
1382 |
if (length < 0 || length + dataoffset > svlen) |
1383 |
length = svlen - dataoffset; |
1384 |
} |
1385 |
else |
1386 |
{ |
1387 |
/* read: grow scalar as necessary */ |
1388 |
svptr = SvGROW (data, length + dataoffset); |
1389 |
} |
1390 |
|
1391 |
if (length < 0) |
1392 |
croak ("length must not be negative"); |
1393 |
|
1394 |
{ |
1395 |
dREQ; |
1396 |
|
1397 |
req->type = ix; |
1398 |
req->fh = newSVsv (fh); |
1399 |
req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
1400 |
: IoOFP (sv_2io (fh))); |
1401 |
req->offs = offset; |
1402 |
req->size = length; |
1403 |
req->sv1 = SvREFCNT_inc (data); |
1404 |
req->ptr1 = (char *)svptr + dataoffset; |
1405 |
req->stroffset = dataoffset; |
1406 |
|
1407 |
if (!SvREADONLY (data)) |
1408 |
{ |
1409 |
SvREADONLY_on (data); |
1410 |
req->flags |= FLAG_SV1_RO_OFF; |
1411 |
} |
1412 |
|
1413 |
REQ_SEND; |
1414 |
} |
1415 |
} |
1416 |
|
1417 |
void |
1418 |
aio_readlink (path,callback=&PL_sv_undef) |
1419 |
SV8 * path |
1420 |
SV * callback |
1421 |
PROTOTYPE: $$;$ |
1422 |
PPCODE: |
1423 |
{ |
1424 |
SV *data; |
1425 |
dREQ; |
1426 |
|
1427 |
data = newSV (NAME_MAX); |
1428 |
SvPOK_on (data); |
1429 |
|
1430 |
req->type = REQ_READLINK; |
1431 |
req->fh = newSVsv (path); |
1432 |
req->ptr2 = SvPVbyte_nolen (req->fh); |
1433 |
req->sv1 = data; |
1434 |
req->ptr1 = SvPVbyte_nolen (data); |
1435 |
|
1436 |
REQ_SEND; |
1437 |
} |
1438 |
|
1439 |
void |
1440 |
aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef) |
1441 |
SV * out_fh |
1442 |
SV * in_fh |
1443 |
UV in_offset |
1444 |
UV length |
1445 |
SV * callback |
1446 |
PROTOTYPE: $$$$;$ |
1447 |
PPCODE: |
1448 |
{ |
1449 |
dREQ; |
1450 |
|
1451 |
req->type = REQ_SENDFILE; |
1452 |
req->fh = newSVsv (out_fh); |
1453 |
req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh))); |
1454 |
req->sv2 = newSVsv (in_fh); |
1455 |
req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh))); |
1456 |
req->offs = in_offset; |
1457 |
req->size = length; |
1458 |
|
1459 |
REQ_SEND; |
1460 |
} |
1461 |
|
1462 |
void |
1463 |
aio_readahead (fh,offset,length,callback=&PL_sv_undef) |
1464 |
SV * fh |
1465 |
UV offset |
1466 |
IV length |
1467 |
SV * callback |
1468 |
PROTOTYPE: $$$;$ |
1469 |
PPCODE: |
1470 |
{ |
1471 |
dREQ; |
1472 |
|
1473 |
req->type = REQ_READAHEAD; |
1474 |
req->fh = newSVsv (fh); |
1475 |
req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh))); |
1476 |
req->offs = offset; |
1477 |
req->size = length; |
1478 |
|
1479 |
REQ_SEND; |
1480 |
} |
1481 |
|
1482 |
void |
1483 |
aio_stat (fh_or_path,callback=&PL_sv_undef) |
1484 |
SV8 * fh_or_path |
1485 |
SV * callback |
1486 |
ALIAS: |
1487 |
aio_stat = REQ_STAT |
1488 |
aio_lstat = REQ_LSTAT |
1489 |
PPCODE: |
1490 |
{ |
1491 |
dREQ; |
1492 |
|
1493 |
req->ptr2 = malloc (sizeof (Stat_t)); |
1494 |
if (!req->ptr2) |
1495 |
{ |
1496 |
req_free (req); |
1497 |
croak ("out of memory during aio_stat statdata allocation"); |
1498 |
} |
1499 |
|
1500 |
req->flags |= FLAG_PTR2_FREE; |
1501 |
|
1502 |
if (SvPOK (fh_or_path)) |
1503 |
{ |
1504 |
req->type = ix; |
1505 |
req->sv1 = newSVsv (fh_or_path); |
1506 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
1507 |
} |
1508 |
else |
1509 |
{ |
1510 |
req->type = REQ_FSTAT; |
1511 |
req->fh = newSVsv (fh_or_path); |
1512 |
req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
1513 |
} |
1514 |
|
1515 |
REQ_SEND; |
1516 |
} |
1517 |
|
1518 |
void |
1519 |
aio_unlink (pathname,callback=&PL_sv_undef) |
1520 |
SV8 * pathname |
1521 |
SV * callback |
1522 |
ALIAS: |
1523 |
aio_unlink = REQ_UNLINK |
1524 |
aio_rmdir = REQ_RMDIR |
1525 |
aio_readdir = REQ_READDIR |
1526 |
PPCODE: |
1527 |
{ |
1528 |
dREQ; |
1529 |
|
1530 |
req->type = ix; |
1531 |
req->sv1 = newSVsv (pathname); |
1532 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
1533 |
|
1534 |
REQ_SEND; |
1535 |
} |
1536 |
|
1537 |
void |
1538 |
aio_link (oldpath,newpath,callback=&PL_sv_undef) |
1539 |
SV8 * oldpath |
1540 |
SV8 * newpath |
1541 |
SV * callback |
1542 |
ALIAS: |
1543 |
aio_link = REQ_LINK |
1544 |
aio_symlink = REQ_SYMLINK |
1545 |
aio_rename = REQ_RENAME |
1546 |
PPCODE: |
1547 |
{ |
1548 |
dREQ; |
1549 |
|
1550 |
req->type = ix; |
1551 |
req->fh = newSVsv (oldpath); |
1552 |
req->ptr2 = SvPVbyte_nolen (req->fh); |
1553 |
req->sv1 = newSVsv (newpath); |
1554 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
1555 |
|
1556 |
REQ_SEND; |
1557 |
} |
1558 |
|
1559 |
void |
1560 |
aio_mknod (pathname,mode,dev,callback=&PL_sv_undef) |
1561 |
SV8 * pathname |
1562 |
SV * callback |
1563 |
UV mode |
1564 |
UV dev |
1565 |
PPCODE: |
1566 |
{ |
1567 |
dREQ; |
1568 |
|
1569 |
req->type = REQ_MKNOD; |
1570 |
req->sv1 = newSVsv (pathname); |
1571 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
1572 |
req->mode = (mode_t)mode; |
1573 |
req->offs = dev; |
1574 |
|
1575 |
REQ_SEND; |
1576 |
} |
1577 |
|
1578 |
void |
1579 |
aio_busy (delay,callback=&PL_sv_undef) |
1580 |
double delay |
1581 |
SV * callback |
1582 |
PPCODE: |
1583 |
{ |
1584 |
dREQ; |
1585 |
|
1586 |
req->type = REQ_BUSY; |
1587 |
req->int1 = delay < 0. ? 0 : delay; |
1588 |
req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1); |
1589 |
|
1590 |
REQ_SEND; |
1591 |
} |
1592 |
|
1593 |
void |
1594 |
aio_group (callback=&PL_sv_undef) |
1595 |
SV * callback |
1596 |
PROTOTYPE: ;$ |
1597 |
PPCODE: |
1598 |
{ |
1599 |
dREQ; |
1600 |
|
1601 |
req->type = REQ_GROUP; |
1602 |
|
1603 |
req_send (req); |
1604 |
XPUSHs (req_sv (req, AIO_GRP_KLASS)); |
1605 |
} |
1606 |
|
1607 |
void |
1608 |
aio_nop (callback=&PL_sv_undef) |
1609 |
SV * callback |
1610 |
PPCODE: |
1611 |
{ |
1612 |
dREQ; |
1613 |
|
1614 |
req->type = REQ_NOP; |
1615 |
|
1616 |
REQ_SEND; |
1617 |
} |
1618 |
|
1619 |
int |
1620 |
aioreq_pri (int pri = 0) |
1621 |
PROTOTYPE: ;$ |
1622 |
CODE: |
1623 |
RETVAL = next_pri - PRI_BIAS; |
1624 |
if (items > 0) |
1625 |
{ |
1626 |
if (pri < PRI_MIN) pri = PRI_MIN; |
1627 |
if (pri > PRI_MAX) pri = PRI_MAX; |
1628 |
next_pri = pri + PRI_BIAS; |
1629 |
} |
1630 |
OUTPUT: |
1631 |
RETVAL |
1632 |
|
1633 |
void |
1634 |
aioreq_nice (int nice = 0) |
1635 |
CODE: |
1636 |
nice = next_pri - nice; |
1637 |
if (nice < PRI_MIN) nice = PRI_MIN; |
1638 |
if (nice > PRI_MAX) nice = PRI_MAX; |
1639 |
next_pri = nice + PRI_BIAS; |
1640 |
|
1641 |
void |
1642 |
flush () |
1643 |
PROTOTYPE: |
1644 |
CODE: |
1645 |
while (nreqs) |
1646 |
{ |
1647 |
poll_wait (); |
1648 |
poll_cb (); |
1649 |
} |
1650 |
|
1651 |
int |
1652 |
poll() |
1653 |
PROTOTYPE: |
1654 |
CODE: |
1655 |
poll_wait (); |
1656 |
RETVAL = poll_cb (); |
1657 |
OUTPUT: |
1658 |
RETVAL |
1659 |
|
1660 |
int |
1661 |
poll_fileno() |
1662 |
PROTOTYPE: |
1663 |
CODE: |
1664 |
RETVAL = respipe [0]; |
1665 |
OUTPUT: |
1666 |
RETVAL |
1667 |
|
1668 |
int |
1669 |
poll_cb(...) |
1670 |
PROTOTYPE: |
1671 |
CODE: |
1672 |
RETVAL = poll_cb (); |
1673 |
OUTPUT: |
1674 |
RETVAL |
1675 |
|
1676 |
void |
1677 |
poll_wait() |
1678 |
PROTOTYPE: |
1679 |
CODE: |
1680 |
poll_wait (); |
1681 |
|
1682 |
int |
1683 |
nreqs() |
1684 |
PROTOTYPE: |
1685 |
CODE: |
1686 |
RETVAL = nreqs; |
1687 |
OUTPUT: |
1688 |
RETVAL |
1689 |
|
1690 |
int |
1691 |
nready() |
1692 |
PROTOTYPE: |
1693 |
CODE: |
1694 |
RETVAL = get_nready (); |
1695 |
OUTPUT: |
1696 |
RETVAL |
1697 |
|
1698 |
int |
1699 |
npending() |
1700 |
PROTOTYPE: |
1701 |
CODE: |
1702 |
RETVAL = get_npending (); |
1703 |
OUTPUT: |
1704 |
RETVAL |
1705 |
|
1706 |
int |
1707 |
nthreads() |
1708 |
PROTOTYPE: |
1709 |
CODE: |
1710 |
if (WORDACCESS_UNSAFE) LOCK (wrklock); |
1711 |
RETVAL = started; |
1712 |
if (WORDACCESS_UNSAFE) UNLOCK (wrklock); |
1713 |
OUTPUT: |
1714 |
RETVAL |
1715 |
|
1716 |
PROTOTYPES: DISABLE |
1717 |
|
1718 |
MODULE = IO::AIO PACKAGE = IO::AIO::REQ |
1719 |
|
1720 |
void |
1721 |
cancel (aio_req_ornot req) |
1722 |
CODE: |
1723 |
req_cancel (req); |
1724 |
|
1725 |
void |
1726 |
cb (aio_req_ornot req, SV *callback=&PL_sv_undef) |
1727 |
CODE: |
1728 |
SvREFCNT_dec (req->callback); |
1729 |
req->callback = newSVsv (callback); |
1730 |
|
1731 |
MODULE = IO::AIO PACKAGE = IO::AIO::GRP |
1732 |
|
1733 |
void |
1734 |
add (aio_req grp, ...) |
1735 |
PPCODE: |
1736 |
{ |
1737 |
int i; |
1738 |
aio_req req; |
1739 |
|
1740 |
if (grp->int1 == 2) |
1741 |
croak ("cannot add requests to IO::AIO::GRP after the group finished"); |
1742 |
|
1743 |
for (i = 1; i < items; ++i ) |
1744 |
{ |
1745 |
if (GIMME_V != G_VOID) |
1746 |
XPUSHs (sv_2mortal (newSVsv (ST (i)))); |
1747 |
|
1748 |
req = SvAIO_REQ (ST (i)); |
1749 |
|
1750 |
if (req) |
1751 |
{ |
1752 |
++grp->size; |
1753 |
req->grp = grp; |
1754 |
|
1755 |
req->grp_prev = 0; |
1756 |
req->grp_next = grp->grp_first; |
1757 |
|
1758 |
if (grp->grp_first) |
1759 |
grp->grp_first->grp_prev = req; |
1760 |
|
1761 |
grp->grp_first = req; |
1762 |
} |
1763 |
} |
1764 |
} |
1765 |
|
1766 |
void |
1767 |
cancel_subs (aio_req_ornot req) |
1768 |
CODE: |
1769 |
req_cancel_subs (req); |
1770 |
|
1771 |
void |
1772 |
result (aio_req grp, ...) |
1773 |
CODE: |
1774 |
{ |
1775 |
int i; |
1776 |
AV *av; |
1777 |
|
1778 |
grp->errorno = errno; |
1779 |
|
1780 |
av = newAV (); |
1781 |
|
1782 |
for (i = 1; i < items; ++i ) |
1783 |
av_push (av, newSVsv (ST (i))); |
1784 |
|
1785 |
SvREFCNT_dec (grp->sv1); |
1786 |
grp->sv1 = (SV *)av; |
1787 |
} |
1788 |
|
1789 |
void |
1790 |
errno (aio_req grp, int errorno = errno) |
1791 |
CODE: |
1792 |
grp->errorno = errorno; |
1793 |
|
1794 |
void |
1795 |
limit (aio_req grp, int limit) |
1796 |
CODE: |
1797 |
grp->int2 = limit; |
1798 |
aio_grp_feed (grp); |
1799 |
|
1800 |
void |
1801 |
feed (aio_req grp, SV *callback=&PL_sv_undef) |
1802 |
CODE: |
1803 |
{ |
1804 |
SvREFCNT_dec (grp->sv2); |
1805 |
grp->sv2 = newSVsv (callback); |
1806 |
|
1807 |
if (grp->int2 <= 0) |
1808 |
grp->int2 = 2; |
1809 |
|
1810 |
aio_grp_feed (grp); |
1811 |
} |
1812 |
|