1 |
#include "EXTERN.h" |
2 |
#include "perl.h" |
3 |
#include "XSUB.h" |
4 |
|
5 |
#include <sys/types.h> |
6 |
#include <sys/stat.h> |
7 |
#include <unistd.h> |
8 |
#include <fcntl.h> |
9 |
#include <signal.h> |
10 |
#include <sched.h> |
11 |
#include <endian.h> |
12 |
|
13 |
#include <pthread.h> |
14 |
#include <sys/syscall.h> |
15 |
|
16 |
typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
17 |
typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
18 |
typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
19 |
|
20 |
#if __ia64 |
21 |
# define STACKSIZE 65536 |
22 |
#else |
23 |
# define STACKSIZE 4096 |
24 |
#endif |
25 |
|
26 |
enum { |
27 |
REQ_QUIT, |
28 |
REQ_OPEN, REQ_CLOSE, |
29 |
REQ_READ, REQ_WRITE, REQ_READAHEAD, |
30 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, |
31 |
REQ_FSYNC, REQ_FDATASYNC, |
32 |
}; |
33 |
|
34 |
typedef struct aio_cb { |
35 |
struct aio_cb *volatile next; |
36 |
|
37 |
int type; |
38 |
|
39 |
int fd; |
40 |
off_t offset; |
41 |
size_t length; |
42 |
ssize_t result; |
43 |
mode_t mode; /* open */ |
44 |
int errorno; |
45 |
SV *data, *callback; |
46 |
void *dataptr; |
47 |
STRLEN dataoffset; |
48 |
|
49 |
Stat_t *statdata; |
50 |
} aio_cb; |
51 |
|
52 |
typedef aio_cb *aio_req; |
53 |
|
54 |
static int started; |
55 |
static int nreqs; |
56 |
static int max_outstanding = 1<<30; |
57 |
static int respipe [2]; |
58 |
|
59 |
static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; |
60 |
static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; |
61 |
static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
62 |
|
63 |
static volatile aio_req reqs, reqe; /* queue start, queue end */ |
64 |
static volatile aio_req ress, rese; /* queue start, queue end */ |
65 |
|
66 |
static void |
67 |
poll_wait () |
68 |
{ |
69 |
if (!nreqs) |
70 |
return; |
71 |
|
72 |
fd_set rfd; |
73 |
FD_ZERO(&rfd); |
74 |
FD_SET(respipe [0], &rfd); |
75 |
|
76 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
77 |
} |
78 |
|
79 |
static int |
80 |
poll_cb () |
81 |
{ |
82 |
dSP; |
83 |
int count = 0; |
84 |
aio_req req; |
85 |
|
86 |
{ |
87 |
/* read and signals sent by the worker threads */ |
88 |
char buf [32]; |
89 |
while (read (respipe [0], buf, 32) > 0) |
90 |
; |
91 |
} |
92 |
|
93 |
for (;;) |
94 |
{ |
95 |
pthread_mutex_lock (&reslock); |
96 |
|
97 |
req = ress; |
98 |
|
99 |
if (ress) |
100 |
{ |
101 |
ress = ress->next; |
102 |
if (!ress) rese = 0; |
103 |
} |
104 |
|
105 |
pthread_mutex_unlock (&reslock); |
106 |
|
107 |
if (!req) |
108 |
break; |
109 |
|
110 |
nreqs--; |
111 |
|
112 |
if (req->type == REQ_QUIT) |
113 |
started--; |
114 |
else |
115 |
{ |
116 |
int errorno = errno; |
117 |
errno = req->errorno; |
118 |
|
119 |
if (req->type == REQ_READ) |
120 |
SvCUR_set (req->data, req->dataoffset |
121 |
+ req->result > 0 ? req->result : 0); |
122 |
|
123 |
if (req->data) |
124 |
SvREFCNT_dec (req->data); |
125 |
|
126 |
if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
127 |
{ |
128 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
129 |
PL_laststatval = req->result; |
130 |
PL_statcache = *(req->statdata); |
131 |
|
132 |
Safefree (req->statdata); |
133 |
} |
134 |
|
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 = POPs; |
148 |
|
149 |
PUSHMARK (SP); |
150 |
XPUSHs (fh); |
151 |
} |
152 |
|
153 |
PUTBACK; |
154 |
call_sv (req->callback, G_VOID | G_EVAL); |
155 |
SPAGAIN; |
156 |
|
157 |
if (req->callback) |
158 |
SvREFCNT_dec (req->callback); |
159 |
|
160 |
errno = errorno; |
161 |
count++; |
162 |
} |
163 |
|
164 |
Safefree (req); |
165 |
} |
166 |
|
167 |
return count; |
168 |
} |
169 |
|
170 |
static void *aio_proc(void *arg); |
171 |
|
172 |
static void |
173 |
start_thread (void) |
174 |
{ |
175 |
sigset_t fullsigset, oldsigset; |
176 |
pthread_t tid; |
177 |
pthread_attr_t attr; |
178 |
|
179 |
pthread_attr_init (&attr); |
180 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
181 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
182 |
|
183 |
sigfillset (&fullsigset); |
184 |
sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
185 |
|
186 |
if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
187 |
started++; |
188 |
|
189 |
sigprocmask (SIG_SETMASK, &oldsigset, 0); |
190 |
} |
191 |
|
192 |
static void |
193 |
send_req (aio_req req) |
194 |
{ |
195 |
nreqs++; |
196 |
|
197 |
pthread_mutex_lock (&reqlock); |
198 |
|
199 |
req->next = 0; |
200 |
|
201 |
if (reqe) |
202 |
{ |
203 |
reqe->next = req; |
204 |
reqe = req; |
205 |
} |
206 |
else |
207 |
reqe = reqs = req; |
208 |
|
209 |
pthread_cond_signal (&reqwait); |
210 |
pthread_mutex_unlock (&reqlock); |
211 |
|
212 |
while (nreqs > max_outstanding) |
213 |
{ |
214 |
poll_wait (); |
215 |
poll_cb (); |
216 |
} |
217 |
} |
218 |
|
219 |
static void |
220 |
end_thread (void) |
221 |
{ |
222 |
aio_req req; |
223 |
New (0, req, 1, aio_cb); |
224 |
req->type = REQ_QUIT; |
225 |
|
226 |
send_req (req); |
227 |
} |
228 |
|
229 |
static void |
230 |
read_write (int dowrite, int fd, off_t offset, size_t length, |
231 |
SV *data, STRLEN dataoffset, SV *callback) |
232 |
{ |
233 |
aio_req req; |
234 |
STRLEN svlen; |
235 |
char *svptr = SvPV (data, svlen); |
236 |
|
237 |
SvUPGRADE (data, SVt_PV); |
238 |
SvPOK_on (data); |
239 |
|
240 |
if (dataoffset < 0) |
241 |
dataoffset += svlen; |
242 |
|
243 |
if (dataoffset < 0 || dataoffset > svlen) |
244 |
croak ("data offset outside of string"); |
245 |
|
246 |
if (dowrite) |
247 |
{ |
248 |
/* write: check length and adjust. */ |
249 |
if (length < 0 || length + dataoffset > svlen) |
250 |
length = svlen - dataoffset; |
251 |
} |
252 |
else |
253 |
{ |
254 |
/* read: grow scalar as necessary */ |
255 |
svptr = SvGROW (data, length + dataoffset); |
256 |
} |
257 |
|
258 |
if (length < 0) |
259 |
croak ("length must not be negative"); |
260 |
|
261 |
Newz (0, req, 1, aio_cb); |
262 |
|
263 |
if (!req) |
264 |
croak ("out of memory during aio_req allocation"); |
265 |
|
266 |
req->type = dowrite ? REQ_WRITE : REQ_READ; |
267 |
req->fd = fd; |
268 |
req->offset = offset; |
269 |
req->length = length; |
270 |
req->data = SvREFCNT_inc (data); |
271 |
req->dataptr = (char *)svptr + dataoffset; |
272 |
req->callback = SvREFCNT_inc (callback); |
273 |
|
274 |
send_req (req); |
275 |
} |
276 |
|
277 |
static void * |
278 |
aio_proc (void *thr_arg) |
279 |
{ |
280 |
aio_req req; |
281 |
int type; |
282 |
|
283 |
do |
284 |
{ |
285 |
pthread_mutex_lock (&reqlock); |
286 |
|
287 |
for (;;) |
288 |
{ |
289 |
req = reqs; |
290 |
|
291 |
if (reqs) |
292 |
{ |
293 |
reqs = reqs->next; |
294 |
if (!reqs) reqe = 0; |
295 |
} |
296 |
|
297 |
if (req) |
298 |
break; |
299 |
|
300 |
pthread_cond_wait (&reqwait, &reqlock); |
301 |
} |
302 |
|
303 |
pthread_mutex_unlock (&reqlock); |
304 |
|
305 |
errno = 0; /* strictly unnecessary */ |
306 |
|
307 |
type = req->type; |
308 |
|
309 |
switch (type) |
310 |
{ |
311 |
case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; |
312 |
case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; |
313 |
#if SYS_readahead |
314 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
315 |
#else |
316 |
case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break; |
317 |
#endif |
318 |
|
319 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
320 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
321 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
322 |
|
323 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
324 |
case REQ_CLOSE: req->result = close (req->fd); break; |
325 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
326 |
|
327 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
328 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
329 |
|
330 |
case REQ_QUIT: |
331 |
break; |
332 |
|
333 |
default: |
334 |
req->result = ENOSYS; |
335 |
break; |
336 |
} |
337 |
|
338 |
req->errorno = errno; |
339 |
|
340 |
pthread_mutex_lock (&reslock); |
341 |
|
342 |
req->next = 0; |
343 |
|
344 |
if (rese) |
345 |
{ |
346 |
rese->next = req; |
347 |
rese = req; |
348 |
} |
349 |
else |
350 |
{ |
351 |
rese = ress = req; |
352 |
|
353 |
/* write a dummy byte to the pipe so fh becomes ready */ |
354 |
write (respipe [1], &respipe, 1); |
355 |
} |
356 |
|
357 |
pthread_mutex_unlock (&reslock); |
358 |
} |
359 |
while (type != REQ_QUIT); |
360 |
|
361 |
return 0; |
362 |
} |
363 |
|
364 |
MODULE = IO::AIO PACKAGE = IO::AIO |
365 |
|
366 |
BOOT: |
367 |
{ |
368 |
if (pipe (respipe)) |
369 |
croak ("unable to initialize result pipe"); |
370 |
|
371 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
372 |
croak ("cannot set result pipe to nonblocking mode"); |
373 |
|
374 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
375 |
croak ("cannot set result pipe to nonblocking mode"); |
376 |
} |
377 |
|
378 |
void |
379 |
min_parallel(nthreads) |
380 |
int nthreads |
381 |
PROTOTYPE: $ |
382 |
CODE: |
383 |
while (nthreads > started) |
384 |
start_thread (); |
385 |
|
386 |
void |
387 |
max_parallel(nthreads) |
388 |
int nthreads |
389 |
PROTOTYPE: $ |
390 |
CODE: |
391 |
{ |
392 |
int cur = started; |
393 |
while (cur > nthreads) |
394 |
{ |
395 |
end_thread (); |
396 |
cur--; |
397 |
} |
398 |
|
399 |
while (started > nthreads) |
400 |
{ |
401 |
poll_wait (); |
402 |
poll_cb (); |
403 |
} |
404 |
} |
405 |
|
406 |
int |
407 |
max_outstanding(nreqs) |
408 |
int nreqs |
409 |
PROTOTYPE: $ |
410 |
CODE: |
411 |
RETVAL = max_outstanding; |
412 |
max_outstanding = nreqs; |
413 |
|
414 |
void |
415 |
aio_open(pathname,flags,mode,callback) |
416 |
SV * pathname |
417 |
int flags |
418 |
int mode |
419 |
SV * callback |
420 |
PROTOTYPE: $$$$ |
421 |
CODE: |
422 |
{ |
423 |
aio_req req; |
424 |
|
425 |
Newz (0, req, 1, aio_cb); |
426 |
|
427 |
if (!req) |
428 |
croak ("out of memory during aio_req allocation"); |
429 |
|
430 |
req->type = REQ_OPEN; |
431 |
req->data = newSVsv (pathname); |
432 |
req->dataptr = SvPV_nolen (req->data); |
433 |
req->fd = flags; |
434 |
req->mode = mode; |
435 |
req->callback = SvREFCNT_inc (callback); |
436 |
|
437 |
send_req (req); |
438 |
} |
439 |
|
440 |
void |
441 |
aio_close(fh,callback) |
442 |
InputStream fh |
443 |
SV * callback |
444 |
PROTOTYPE: $$ |
445 |
ALIAS: |
446 |
aio_close = REQ_CLOSE |
447 |
aio_fsync = REQ_FSYNC |
448 |
aio_fdatasync = REQ_FDATASYNC |
449 |
CODE: |
450 |
{ |
451 |
aio_req req; |
452 |
|
453 |
Newz (0, req, 1, aio_cb); |
454 |
|
455 |
if (!req) |
456 |
croak ("out of memory during aio_req allocation"); |
457 |
|
458 |
req->type = ix; |
459 |
req->fd = PerlIO_fileno (fh); |
460 |
req->callback = SvREFCNT_inc (callback); |
461 |
|
462 |
send_req (req); |
463 |
} |
464 |
|
465 |
void |
466 |
aio_read(fh,offset,length,data,dataoffset,callback) |
467 |
InputStream fh |
468 |
UV offset |
469 |
IV length |
470 |
SV * data |
471 |
IV dataoffset |
472 |
SV * callback |
473 |
PROTOTYPE: $$$$$$ |
474 |
CODE: |
475 |
read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
476 |
|
477 |
void |
478 |
aio_write(fh,offset,length,data,dataoffset,callback) |
479 |
OutputStream fh |
480 |
UV offset |
481 |
IV length |
482 |
SV * data |
483 |
IV dataoffset |
484 |
SV * callback |
485 |
PROTOTYPE: $$$$$$ |
486 |
CODE: |
487 |
read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
488 |
|
489 |
void |
490 |
aio_readahead(fh,offset,length,callback) |
491 |
InputStream fh |
492 |
UV offset |
493 |
IV length |
494 |
SV * callback |
495 |
PROTOTYPE: $$$$ |
496 |
CODE: |
497 |
{ |
498 |
aio_req req; |
499 |
|
500 |
if (length < 0) |
501 |
croak ("length must not be negative"); |
502 |
|
503 |
Newz (0, req, 1, aio_cb); |
504 |
|
505 |
if (!req) |
506 |
croak ("out of memory during aio_req allocation"); |
507 |
|
508 |
req->type = REQ_READAHEAD; |
509 |
req->fd = PerlIO_fileno (fh); |
510 |
req->offset = offset; |
511 |
req->length = length; |
512 |
req->callback = SvREFCNT_inc (callback); |
513 |
|
514 |
send_req (req); |
515 |
} |
516 |
|
517 |
void |
518 |
aio_stat(fh_or_path,callback) |
519 |
SV * fh_or_path |
520 |
SV * callback |
521 |
PROTOTYPE: $$ |
522 |
ALIAS: |
523 |
aio_lstat = 1 |
524 |
CODE: |
525 |
{ |
526 |
aio_req req; |
527 |
|
528 |
Newz (0, req, 1, aio_cb); |
529 |
|
530 |
if (!req) |
531 |
croak ("out of memory during aio_req allocation"); |
532 |
|
533 |
New (0, req->statdata, 1, Stat_t); |
534 |
|
535 |
if (!req->statdata) |
536 |
croak ("out of memory during aio_req->statdata allocation"); |
537 |
|
538 |
if (SvPOK (fh_or_path)) |
539 |
{ |
540 |
req->type = ix ? REQ_LSTAT : REQ_STAT; |
541 |
req->data = newSVsv (fh_or_path); |
542 |
req->dataptr = SvPV_nolen (req->data); |
543 |
} |
544 |
else |
545 |
{ |
546 |
req->type = REQ_FSTAT; |
547 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
548 |
} |
549 |
|
550 |
req->callback = SvREFCNT_inc (callback); |
551 |
|
552 |
send_req (req); |
553 |
} |
554 |
|
555 |
void |
556 |
aio_unlink(pathname,callback) |
557 |
SV * pathname |
558 |
SV * callback |
559 |
PROTOTYPE: $$ |
560 |
CODE: |
561 |
{ |
562 |
aio_req req; |
563 |
|
564 |
Newz (0, req, 1, aio_cb); |
565 |
|
566 |
if (!req) |
567 |
croak ("out of memory during aio_req allocation"); |
568 |
|
569 |
req->type = REQ_UNLINK; |
570 |
req->data = newSVsv (pathname); |
571 |
req->dataptr = SvPV_nolen (req->data); |
572 |
req->callback = SvREFCNT_inc (callback); |
573 |
|
574 |
send_req (req); |
575 |
} |
576 |
|
577 |
void |
578 |
flush() |
579 |
PROTOTYPE: |
580 |
CODE: |
581 |
while (nreqs) |
582 |
{ |
583 |
poll_wait (); |
584 |
poll_cb (); |
585 |
} |
586 |
|
587 |
int |
588 |
poll_fileno() |
589 |
PROTOTYPE: |
590 |
CODE: |
591 |
RETVAL = respipe [0]; |
592 |
OUTPUT: |
593 |
RETVAL |
594 |
|
595 |
int |
596 |
poll_cb(...) |
597 |
PROTOTYPE: |
598 |
CODE: |
599 |
RETVAL = poll_cb (); |
600 |
OUTPUT: |
601 |
RETVAL |
602 |
|
603 |
void |
604 |
poll_wait() |
605 |
PROTOTYPE: |
606 |
CODE: |
607 |
if (nreqs) |
608 |
poll_wait (); |
609 |
|
610 |
int |
611 |
nreqs() |
612 |
PROTOTYPE: |
613 |
CODE: |
614 |
RETVAL = nreqs; |
615 |
OUTPUT: |
616 |
RETVAL |
617 |
|