1 |
#define _XOPEN_SOURCE 500 |
2 |
|
3 |
#include "EXTERN.h" |
4 |
#include "perl.h" |
5 |
#include "XSUB.h" |
6 |
|
7 |
#include <sys/types.h> |
8 |
#include <sys/stat.h> |
9 |
|
10 |
#include <unistd.h> |
11 |
#include <fcntl.h> |
12 |
#include <signal.h> |
13 |
#include <sched.h> |
14 |
#if __linux |
15 |
#include <sys/syscall.h> |
16 |
#endif |
17 |
|
18 |
#include <pthread.h> |
19 |
|
20 |
typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
21 |
typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
22 |
typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
23 |
|
24 |
#if __ia64 |
25 |
# define STACKSIZE 65536 |
26 |
#else |
27 |
# define STACKSIZE 4096 |
28 |
#endif |
29 |
|
30 |
enum { |
31 |
REQ_QUIT, |
32 |
REQ_OPEN, REQ_CLOSE, |
33 |
REQ_READ, REQ_WRITE, REQ_READAHEAD, |
34 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, |
35 |
REQ_FSYNC, REQ_FDATASYNC, |
36 |
}; |
37 |
|
38 |
typedef struct aio_cb { |
39 |
struct aio_cb *volatile next; |
40 |
|
41 |
int type; |
42 |
|
43 |
int fd; |
44 |
off_t offset; |
45 |
size_t length; |
46 |
ssize_t result; |
47 |
mode_t mode; /* open */ |
48 |
int errorno; |
49 |
SV *data, *callback, *fh; |
50 |
void *dataptr; |
51 |
STRLEN dataoffset; |
52 |
|
53 |
Stat_t *statdata; |
54 |
} aio_cb; |
55 |
|
56 |
typedef aio_cb *aio_req; |
57 |
|
58 |
static int started; |
59 |
static volatile int nreqs; |
60 |
static int max_outstanding = 1<<30; |
61 |
static int respipe [2]; |
62 |
|
63 |
static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; |
64 |
static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; |
65 |
static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
66 |
|
67 |
static volatile aio_req reqs, reqe; /* queue start, queue end */ |
68 |
static volatile aio_req ress, rese; /* queue start, queue end */ |
69 |
|
70 |
static void |
71 |
poll_wait () |
72 |
{ |
73 |
if (nreqs && !ress) |
74 |
{ |
75 |
fd_set rfd; |
76 |
FD_ZERO(&rfd); |
77 |
FD_SET(respipe [0], &rfd); |
78 |
|
79 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
80 |
} |
81 |
} |
82 |
|
83 |
static int |
84 |
poll_cb () |
85 |
{ |
86 |
dSP; |
87 |
int count = 0; |
88 |
aio_req req, prv; |
89 |
|
90 |
pthread_mutex_lock (&reslock); |
91 |
|
92 |
{ |
93 |
/* read any signals sent by the worker threads */ |
94 |
char buf [32]; |
95 |
while (read (respipe [0], buf, 32) > 0) |
96 |
; |
97 |
} |
98 |
|
99 |
req = ress; |
100 |
ress = rese = 0; |
101 |
|
102 |
pthread_mutex_unlock (&reslock); |
103 |
|
104 |
while (req) |
105 |
{ |
106 |
nreqs--; |
107 |
|
108 |
if (req->type == REQ_QUIT) |
109 |
started--; |
110 |
else |
111 |
{ |
112 |
int errorno = errno; |
113 |
errno = req->errorno; |
114 |
|
115 |
if (req->type == REQ_READ) |
116 |
SvCUR_set (req->data, req->dataoffset |
117 |
+ req->result > 0 ? req->result : 0); |
118 |
|
119 |
if (req->data) |
120 |
SvREFCNT_dec (req->data); |
121 |
|
122 |
if (req->fh) |
123 |
SvREFCNT_dec (req->fh); |
124 |
|
125 |
if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
126 |
{ |
127 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
128 |
PL_laststatval = req->result; |
129 |
PL_statcache = *(req->statdata); |
130 |
|
131 |
Safefree (req->statdata); |
132 |
} |
133 |
|
134 |
ENTER; |
135 |
PUSHMARK (SP); |
136 |
XPUSHs (sv_2mortal (newSViv (req->result))); |
137 |
|
138 |
if (req->type == REQ_OPEN) |
139 |
{ |
140 |
/* convert fd to fh */ |
141 |
SV *fh; |
142 |
|
143 |
PUTBACK; |
144 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
145 |
SPAGAIN; |
146 |
|
147 |
fh = SvREFCNT_inc (POPs); |
148 |
|
149 |
PUSHMARK (SP); |
150 |
XPUSHs (sv_2mortal (fh)); |
151 |
} |
152 |
|
153 |
if (SvOK (req->callback)) |
154 |
{ |
155 |
PUTBACK; |
156 |
call_sv (req->callback, G_VOID | G_EVAL); |
157 |
SPAGAIN; |
158 |
} |
159 |
|
160 |
LEAVE; |
161 |
|
162 |
if (req->callback) |
163 |
SvREFCNT_dec (req->callback); |
164 |
|
165 |
errno = errorno; |
166 |
count++; |
167 |
} |
168 |
|
169 |
prv = req; |
170 |
req = req->next; |
171 |
Safefree (prv); |
172 |
|
173 |
/* TODO: croak on errors? */ |
174 |
} |
175 |
|
176 |
return count; |
177 |
} |
178 |
|
179 |
static void *aio_proc(void *arg); |
180 |
|
181 |
static void |
182 |
start_thread (void) |
183 |
{ |
184 |
sigset_t fullsigset, oldsigset; |
185 |
pthread_t tid; |
186 |
pthread_attr_t attr; |
187 |
|
188 |
pthread_attr_init (&attr); |
189 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
190 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
191 |
|
192 |
sigfillset (&fullsigset); |
193 |
sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
194 |
|
195 |
if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
196 |
started++; |
197 |
|
198 |
sigprocmask (SIG_SETMASK, &oldsigset, 0); |
199 |
} |
200 |
|
201 |
static void |
202 |
send_req (aio_req req) |
203 |
{ |
204 |
nreqs++; |
205 |
|
206 |
pthread_mutex_lock (&reqlock); |
207 |
|
208 |
req->next = 0; |
209 |
|
210 |
if (reqe) |
211 |
{ |
212 |
reqe->next = req; |
213 |
reqe = req; |
214 |
} |
215 |
else |
216 |
reqe = reqs = req; |
217 |
|
218 |
pthread_cond_signal (&reqwait); |
219 |
pthread_mutex_unlock (&reqlock); |
220 |
|
221 |
while (nreqs > max_outstanding) |
222 |
{ |
223 |
poll_wait (); |
224 |
poll_cb (); |
225 |
} |
226 |
} |
227 |
|
228 |
static void |
229 |
end_thread (void) |
230 |
{ |
231 |
aio_req req; |
232 |
New (0, req, 1, aio_cb); |
233 |
req->type = REQ_QUIT; |
234 |
|
235 |
send_req (req); |
236 |
} |
237 |
|
238 |
static void * |
239 |
aio_proc (void *thr_arg) |
240 |
{ |
241 |
aio_req req; |
242 |
int type; |
243 |
|
244 |
do |
245 |
{ |
246 |
pthread_mutex_lock (&reqlock); |
247 |
|
248 |
for (;;) |
249 |
{ |
250 |
req = reqs; |
251 |
|
252 |
if (reqs) |
253 |
{ |
254 |
reqs = reqs->next; |
255 |
if (!reqs) reqe = 0; |
256 |
} |
257 |
|
258 |
if (req) |
259 |
break; |
260 |
|
261 |
pthread_cond_wait (&reqwait, &reqlock); |
262 |
} |
263 |
|
264 |
pthread_mutex_unlock (&reqlock); |
265 |
|
266 |
errno = 0; /* strictly unnecessary */ |
267 |
|
268 |
type = req->type; |
269 |
|
270 |
switch (type) |
271 |
{ |
272 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
273 |
case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
274 |
#if SYS_readahead |
275 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
276 |
#else |
277 |
case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break; |
278 |
#endif |
279 |
|
280 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
281 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
282 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
283 |
|
284 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
285 |
case REQ_CLOSE: req->result = close (req->fd); break; |
286 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
287 |
|
288 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
289 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
290 |
|
291 |
case REQ_QUIT: |
292 |
break; |
293 |
|
294 |
default: |
295 |
req->result = ENOSYS; |
296 |
break; |
297 |
} |
298 |
|
299 |
req->errorno = errno; |
300 |
|
301 |
pthread_mutex_lock (&reslock); |
302 |
|
303 |
req->next = 0; |
304 |
|
305 |
if (rese) |
306 |
{ |
307 |
rese->next = req; |
308 |
rese = req; |
309 |
} |
310 |
else |
311 |
{ |
312 |
rese = ress = req; |
313 |
|
314 |
/* write a dummy byte to the pipe so fh becomes ready */ |
315 |
write (respipe [1], &respipe, 1); |
316 |
} |
317 |
|
318 |
pthread_mutex_unlock (&reslock); |
319 |
} |
320 |
while (type != REQ_QUIT); |
321 |
|
322 |
return 0; |
323 |
} |
324 |
|
325 |
MODULE = IO::AIO PACKAGE = IO::AIO |
326 |
|
327 |
PROTOTYPES: ENABLE |
328 |
|
329 |
BOOT: |
330 |
{ |
331 |
if (pipe (respipe)) |
332 |
croak ("unable to initialize result pipe"); |
333 |
|
334 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
335 |
croak ("cannot set result pipe to nonblocking mode"); |
336 |
|
337 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
338 |
croak ("cannot set result pipe to nonblocking mode"); |
339 |
} |
340 |
|
341 |
void |
342 |
min_parallel(nthreads) |
343 |
int nthreads |
344 |
PROTOTYPE: $ |
345 |
CODE: |
346 |
while (nthreads > started) |
347 |
start_thread (); |
348 |
|
349 |
void |
350 |
max_parallel(nthreads) |
351 |
int nthreads |
352 |
PROTOTYPE: $ |
353 |
CODE: |
354 |
{ |
355 |
int cur = started; |
356 |
while (cur > nthreads) |
357 |
{ |
358 |
end_thread (); |
359 |
cur--; |
360 |
} |
361 |
|
362 |
while (started > nthreads) |
363 |
{ |
364 |
poll_wait (); |
365 |
poll_cb (); |
366 |
} |
367 |
} |
368 |
|
369 |
int |
370 |
max_outstanding(nreqs) |
371 |
int nreqs |
372 |
PROTOTYPE: $ |
373 |
CODE: |
374 |
RETVAL = max_outstanding; |
375 |
max_outstanding = nreqs; |
376 |
|
377 |
void |
378 |
aio_open(pathname,flags,mode,callback=&PL_sv_undef) |
379 |
SV * pathname |
380 |
int flags |
381 |
int mode |
382 |
SV * callback |
383 |
PROTOTYPE: $$$;$ |
384 |
CODE: |
385 |
{ |
386 |
aio_req req; |
387 |
|
388 |
Newz (0, req, 1, aio_cb); |
389 |
|
390 |
if (!req) |
391 |
croak ("out of memory during aio_req allocation"); |
392 |
|
393 |
req->type = REQ_OPEN; |
394 |
req->data = newSVsv (pathname); |
395 |
req->dataptr = SvPV_nolen (req->data); |
396 |
req->fd = flags; |
397 |
req->mode = mode; |
398 |
req->callback = SvREFCNT_inc (callback); |
399 |
|
400 |
send_req (req); |
401 |
} |
402 |
|
403 |
void |
404 |
aio_close(fh,callback=&PL_sv_undef) |
405 |
SV * fh |
406 |
SV * callback |
407 |
PROTOTYPE: $;$ |
408 |
ALIAS: |
409 |
aio_close = REQ_CLOSE |
410 |
aio_fsync = REQ_FSYNC |
411 |
aio_fdatasync = REQ_FDATASYNC |
412 |
CODE: |
413 |
{ |
414 |
aio_req req; |
415 |
|
416 |
Newz (0, req, 1, aio_cb); |
417 |
|
418 |
if (!req) |
419 |
croak ("out of memory during aio_req allocation"); |
420 |
|
421 |
req->type = ix; |
422 |
req->fh = newSVsv (fh); |
423 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
424 |
req->callback = SvREFCNT_inc (callback); |
425 |
|
426 |
send_req (req); |
427 |
} |
428 |
|
429 |
void |
430 |
aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
431 |
SV * fh |
432 |
UV offset |
433 |
IV length |
434 |
SV * data |
435 |
IV dataoffset |
436 |
SV * callback |
437 |
ALIAS: |
438 |
aio_read = REQ_READ |
439 |
aio_write = REQ_WRITE |
440 |
PROTOTYPE: $$$$$;$ |
441 |
CODE: |
442 |
{ |
443 |
aio_req req; |
444 |
STRLEN svlen; |
445 |
char *svptr = SvPV (data, svlen); |
446 |
|
447 |
SvUPGRADE (data, SVt_PV); |
448 |
SvPOK_on (data); |
449 |
|
450 |
if (dataoffset < 0) |
451 |
dataoffset += svlen; |
452 |
|
453 |
if (dataoffset < 0 || dataoffset > svlen) |
454 |
croak ("data offset outside of string"); |
455 |
|
456 |
if (ix == REQ_WRITE) |
457 |
{ |
458 |
/* write: check length and adjust. */ |
459 |
if (length < 0 || length + dataoffset > svlen) |
460 |
length = svlen - dataoffset; |
461 |
} |
462 |
else |
463 |
{ |
464 |
/* read: grow scalar as necessary */ |
465 |
svptr = SvGROW (data, length + dataoffset); |
466 |
} |
467 |
|
468 |
if (length < 0) |
469 |
croak ("length must not be negative"); |
470 |
|
471 |
Newz (0, req, 1, aio_cb); |
472 |
|
473 |
if (!req) |
474 |
croak ("out of memory during aio_req allocation"); |
475 |
|
476 |
req->type = ix; |
477 |
req->fh = newSVsv (fh); |
478 |
req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
479 |
: IoOFP (sv_2io (fh))); |
480 |
req->offset = offset; |
481 |
req->length = length; |
482 |
req->data = SvREFCNT_inc (data); |
483 |
req->dataptr = (char *)svptr + dataoffset; |
484 |
req->callback = SvREFCNT_inc (callback); |
485 |
|
486 |
send_req (req); |
487 |
} |
488 |
|
489 |
void |
490 |
aio_readahead(fh,offset,length,callback=&PL_sv_undef) |
491 |
SV * fh |
492 |
UV offset |
493 |
IV length |
494 |
SV * callback |
495 |
PROTOTYPE: $$$;$ |
496 |
CODE: |
497 |
{ |
498 |
aio_req req; |
499 |
|
500 |
if (length < 0) |
501 |
croak ("length must not be negative"); |
502 |
|
503 |
Newz (0, req, 1, aio_cb); |
504 |
|
505 |
if (!req) |
506 |
croak ("out of memory during aio_req allocation"); |
507 |
|
508 |
req->type = REQ_READAHEAD; |
509 |
req->fh = newSVsv (fh); |
510 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
511 |
req->offset = offset; |
512 |
req->length = length; |
513 |
req->callback = SvREFCNT_inc (callback); |
514 |
|
515 |
send_req (req); |
516 |
} |
517 |
|
518 |
void |
519 |
aio_stat(fh_or_path,callback=&PL_sv_undef) |
520 |
SV * fh_or_path |
521 |
SV * callback |
522 |
ALIAS: |
523 |
aio_stat = REQ_STAT |
524 |
aio_lstat = REQ_LSTAT |
525 |
CODE: |
526 |
{ |
527 |
aio_req req; |
528 |
|
529 |
Newz (0, req, 1, aio_cb); |
530 |
|
531 |
if (!req) |
532 |
croak ("out of memory during aio_req allocation"); |
533 |
|
534 |
New (0, req->statdata, 1, Stat_t); |
535 |
|
536 |
if (!req->statdata) |
537 |
croak ("out of memory during aio_req->statdata allocation"); |
538 |
|
539 |
if (SvPOK (fh_or_path)) |
540 |
{ |
541 |
req->type = ix; |
542 |
req->data = newSVsv (fh_or_path); |
543 |
req->dataptr = SvPV_nolen (req->data); |
544 |
} |
545 |
else |
546 |
{ |
547 |
req->type = REQ_FSTAT; |
548 |
req->fh = newSVsv (fh_or_path); |
549 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
550 |
} |
551 |
|
552 |
req->callback = SvREFCNT_inc (callback); |
553 |
|
554 |
send_req (req); |
555 |
} |
556 |
|
557 |
void |
558 |
aio_unlink(pathname,callback=&PL_sv_undef) |
559 |
SV * pathname |
560 |
SV * callback |
561 |
CODE: |
562 |
{ |
563 |
aio_req req; |
564 |
|
565 |
Newz (0, req, 1, aio_cb); |
566 |
|
567 |
if (!req) |
568 |
croak ("out of memory during aio_req allocation"); |
569 |
|
570 |
req->type = REQ_UNLINK; |
571 |
req->data = newSVsv (pathname); |
572 |
req->dataptr = SvPV_nolen (req->data); |
573 |
req->callback = SvREFCNT_inc (callback); |
574 |
|
575 |
send_req (req); |
576 |
} |
577 |
|
578 |
void |
579 |
flush() |
580 |
PROTOTYPE: |
581 |
CODE: |
582 |
while (nreqs) |
583 |
{ |
584 |
poll_wait (); |
585 |
poll_cb (); |
586 |
} |
587 |
|
588 |
void |
589 |
poll() |
590 |
PROTOTYPE: |
591 |
CODE: |
592 |
if (nreqs) |
593 |
{ |
594 |
poll_wait (); |
595 |
poll_cb (); |
596 |
} |
597 |
|
598 |
int |
599 |
poll_fileno() |
600 |
PROTOTYPE: |
601 |
CODE: |
602 |
RETVAL = respipe [0]; |
603 |
OUTPUT: |
604 |
RETVAL |
605 |
|
606 |
int |
607 |
poll_cb(...) |
608 |
PROTOTYPE: |
609 |
CODE: |
610 |
RETVAL = poll_cb (); |
611 |
OUTPUT: |
612 |
RETVAL |
613 |
|
614 |
void |
615 |
poll_wait() |
616 |
PROTOTYPE: |
617 |
CODE: |
618 |
if (nreqs) |
619 |
poll_wait (); |
620 |
|
621 |
int |
622 |
nreqs() |
623 |
PROTOTYPE: |
624 |
CODE: |
625 |
RETVAL = nreqs; |
626 |
OUTPUT: |
627 |
RETVAL |
628 |
|