1 |
#define PERL_NO_GET_CONTEXT |
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 |
#include <unistd.h> |
10 |
#include <fcntl.h> |
11 |
#include <signal.h> |
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#include <sched.h> |
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#include <endian.h> |
14 |
|
15 |
#include <pthread.h> |
16 |
#include <sys/syscall.h> |
17 |
|
18 |
typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
19 |
typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
20 |
typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
21 |
|
22 |
#if __ia64 |
23 |
# define STACKSIZE 65536 |
24 |
#else |
25 |
# define STACKSIZE 4096 |
26 |
#endif |
27 |
|
28 |
enum { |
29 |
REQ_QUIT, |
30 |
REQ_OPEN, REQ_CLOSE, |
31 |
REQ_READ, REQ_WRITE, REQ_READAHEAD, |
32 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, |
33 |
REQ_FSYNC, REQ_FDATASYNC, |
34 |
}; |
35 |
|
36 |
typedef struct aio_cb { |
37 |
struct aio_cb *volatile next; |
38 |
|
39 |
int type; |
40 |
|
41 |
int fd; |
42 |
off_t offset; |
43 |
size_t length; |
44 |
ssize_t result; |
45 |
mode_t mode; /* open */ |
46 |
int errorno; |
47 |
SV *data, *callback; |
48 |
void *dataptr; |
49 |
STRLEN dataoffset; |
50 |
|
51 |
Stat_t *statdata; |
52 |
} aio_cb; |
53 |
|
54 |
typedef aio_cb *aio_req; |
55 |
|
56 |
static int started; |
57 |
static int nreqs; |
58 |
static int max_outstanding = 1<<30; |
59 |
static int respipe [2]; |
60 |
|
61 |
static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; |
62 |
static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; |
63 |
static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
64 |
|
65 |
static volatile aio_req reqs, reqe; /* queue start, queue end */ |
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static volatile aio_req ress, rese; /* queue start, queue end */ |
67 |
|
68 |
static void |
69 |
poll_wait () |
70 |
{ |
71 |
if (!nreqs) |
72 |
return; |
73 |
|
74 |
fd_set rfd; |
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FD_ZERO(&rfd); |
76 |
FD_SET(respipe [0], &rfd); |
77 |
|
78 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
79 |
} |
80 |
|
81 |
static int |
82 |
poll_cb (pTHX) |
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{ |
84 |
dSP; |
85 |
int count = 0; |
86 |
aio_req req; |
87 |
|
88 |
{ |
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/* read and signals sent by the worker threads */ |
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char buf [32]; |
91 |
while (read (respipe [0], buf, 32) > 0) |
92 |
; |
93 |
} |
94 |
|
95 |
for (;;) |
96 |
{ |
97 |
pthread_mutex_lock (&reslock); |
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|
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req = ress; |
100 |
|
101 |
if (ress) |
102 |
{ |
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ress = ress->next; |
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if (!ress) rese = 0; |
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} |
106 |
|
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pthread_mutex_unlock (&reslock); |
108 |
|
109 |
if (!req) |
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break; |
111 |
|
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nreqs--; |
113 |
|
114 |
if (req->type == REQ_QUIT) |
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started--; |
116 |
else |
117 |
{ |
118 |
int errorno = errno; |
119 |
errno = req->errorno; |
120 |
|
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if (req->type == REQ_READ) |
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SvCUR_set (req->data, req->dataoffset |
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+ req->result > 0 ? req->result : 0); |
124 |
|
125 |
if (req->data) |
126 |
SvREFCNT_dec (req->data); |
127 |
|
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if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
129 |
{ |
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PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
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PL_laststatval = req->result; |
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PL_statcache = *(req->statdata); |
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|
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Safefree (req->statdata); |
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} |
136 |
|
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PUSHMARK (SP); |
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XPUSHs (sv_2mortal (newSViv (req->result))); |
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|
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if (req->type == REQ_OPEN) |
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{ |
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/* convert fd to fh */ |
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SV *fh; |
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|
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PUTBACK; |
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call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
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SPAGAIN; |
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|
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fh = POPs; |
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|
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PUSHMARK (SP); |
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XPUSHs (fh); |
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} |
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|
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PUTBACK; |
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call_sv (req->callback, G_VOID | G_EVAL); |
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SPAGAIN; |
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|
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if (req->callback) |
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SvREFCNT_dec (req->callback); |
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|
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errno = errorno; |
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count++; |
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} |
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|
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Safefree (req); |
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} |
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|
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return count; |
170 |
} |
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|
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static void *aio_proc(void *arg); |
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|
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static void |
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start_thread (void) |
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{ |
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sigset_t fullsigset, oldsigset; |
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pthread_t tid; |
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pthread_attr_t attr; |
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|
181 |
pthread_attr_init (&attr); |
182 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
183 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
184 |
|
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sigfillset (&fullsigset); |
186 |
sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
187 |
|
188 |
if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
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started++; |
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|
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sigprocmask (SIG_SETMASK, &oldsigset, 0); |
192 |
} |
193 |
|
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static void |
195 |
send_req (aio_req req) |
196 |
{ |
197 |
nreqs++; |
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|
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pthread_mutex_lock (&reqlock); |
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|
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req->next = 0; |
202 |
|
203 |
if (reqe) |
204 |
{ |
205 |
reqe->next = req; |
206 |
reqe = req; |
207 |
} |
208 |
else |
209 |
reqe = reqs = req; |
210 |
|
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pthread_cond_signal (&reqwait); |
212 |
pthread_mutex_unlock (&reqlock); |
213 |
|
214 |
while (nreqs > max_outstanding) |
215 |
{ |
216 |
poll_wait (); |
217 |
poll_cb (); |
218 |
} |
219 |
} |
220 |
|
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static void |
222 |
end_thread (void) |
223 |
{ |
224 |
aio_req req; |
225 |
New (0, req, 1, aio_cb); |
226 |
req->type = REQ_QUIT; |
227 |
|
228 |
send_req (req); |
229 |
} |
230 |
|
231 |
static void |
232 |
read_write (pTHX_ |
233 |
int dowrite, int fd, off_t offset, size_t length, |
234 |
SV *data, STRLEN dataoffset, SV *callback) |
235 |
{ |
236 |
aio_req req; |
237 |
STRLEN svlen; |
238 |
char *svptr = SvPV (data, svlen); |
239 |
|
240 |
SvUPGRADE (data, SVt_PV); |
241 |
SvPOK_on (data); |
242 |
|
243 |
if (dataoffset < 0) |
244 |
dataoffset += svlen; |
245 |
|
246 |
if (dataoffset < 0 || dataoffset > svlen) |
247 |
croak ("data offset outside of string"); |
248 |
|
249 |
if (dowrite) |
250 |
{ |
251 |
/* write: check length and adjust. */ |
252 |
if (length < 0 || length + dataoffset > svlen) |
253 |
length = svlen - dataoffset; |
254 |
} |
255 |
else |
256 |
{ |
257 |
/* read: grow scalar as necessary */ |
258 |
svptr = SvGROW (data, length + dataoffset); |
259 |
} |
260 |
|
261 |
if (length < 0) |
262 |
croak ("length must not be negative"); |
263 |
|
264 |
Newz (0, req, 1, aio_cb); |
265 |
|
266 |
if (!req) |
267 |
croak ("out of memory during aio_req allocation"); |
268 |
|
269 |
req->type = dowrite ? REQ_WRITE : REQ_READ; |
270 |
req->fd = fd; |
271 |
req->offset = offset; |
272 |
req->length = length; |
273 |
req->data = SvREFCNT_inc (data); |
274 |
req->dataptr = (char *)svptr + dataoffset; |
275 |
req->callback = SvREFCNT_inc (callback); |
276 |
|
277 |
send_req (req); |
278 |
} |
279 |
|
280 |
static void * |
281 |
aio_proc (void *thr_arg) |
282 |
{ |
283 |
aio_req req; |
284 |
int type; |
285 |
|
286 |
do |
287 |
{ |
288 |
pthread_mutex_lock (&reqlock); |
289 |
|
290 |
for (;;) |
291 |
{ |
292 |
req = reqs; |
293 |
|
294 |
if (reqs) |
295 |
{ |
296 |
reqs = reqs->next; |
297 |
if (!reqs) reqe = 0; |
298 |
} |
299 |
|
300 |
if (req) |
301 |
break; |
302 |
|
303 |
pthread_cond_wait (&reqwait, &reqlock); |
304 |
} |
305 |
|
306 |
pthread_mutex_unlock (&reqlock); |
307 |
|
308 |
errno = 0; /* strictly unnecessary */ |
309 |
|
310 |
type = req->type; |
311 |
|
312 |
switch (type) |
313 |
{ |
314 |
case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; |
315 |
case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; |
316 |
#if SYS_readahead |
317 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
318 |
#else |
319 |
case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break; |
320 |
#endif |
321 |
|
322 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
323 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
324 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
325 |
|
326 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
327 |
case REQ_CLOSE: req->result = close (req->fd); break; |
328 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
329 |
|
330 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
331 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
332 |
|
333 |
case REQ_QUIT: |
334 |
break; |
335 |
|
336 |
default: |
337 |
req->result = ENOSYS; |
338 |
break; |
339 |
} |
340 |
|
341 |
req->errorno = errno; |
342 |
|
343 |
pthread_mutex_lock (&reslock); |
344 |
|
345 |
req->next = 0; |
346 |
|
347 |
if (rese) |
348 |
{ |
349 |
rese->next = req; |
350 |
rese = req; |
351 |
} |
352 |
else |
353 |
{ |
354 |
rese = ress = req; |
355 |
|
356 |
/* write a dummy byte to the pipe so fh becomes ready */ |
357 |
write (respipe [1], &respipe, 1); |
358 |
} |
359 |
|
360 |
pthread_mutex_unlock (&reslock); |
361 |
} |
362 |
while (type != REQ_QUIT); |
363 |
|
364 |
return 0; |
365 |
} |
366 |
|
367 |
MODULE = IO::AIO PACKAGE = IO::AIO |
368 |
|
369 |
BOOT: |
370 |
{ |
371 |
if (pipe (respipe)) |
372 |
croak ("unable to initialize result pipe"); |
373 |
|
374 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
375 |
croak ("cannot set result pipe to nonblocking mode"); |
376 |
|
377 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
378 |
croak ("cannot set result pipe to nonblocking mode"); |
379 |
} |
380 |
|
381 |
void |
382 |
min_parallel(nthreads) |
383 |
int nthreads |
384 |
PROTOTYPE: $ |
385 |
CODE: |
386 |
while (nthreads > started) |
387 |
start_thread (); |
388 |
|
389 |
void |
390 |
max_parallel(nthreads) |
391 |
int nthreads |
392 |
PROTOTYPE: $ |
393 |
CODE: |
394 |
{ |
395 |
int cur = started; |
396 |
while (cur > nthreads) |
397 |
{ |
398 |
end_thread (); |
399 |
cur--; |
400 |
} |
401 |
|
402 |
while (started > nthreads) |
403 |
{ |
404 |
poll_wait (); |
405 |
poll_cb (aTHX); |
406 |
} |
407 |
} |
408 |
|
409 |
int |
410 |
max_outstanding(nreqs) |
411 |
int nreqs |
412 |
PROTOTYPE: $ |
413 |
CODE: |
414 |
RETVAL = max_outstanding; |
415 |
max_outstanding = nreqs; |
416 |
|
417 |
void |
418 |
aio_open(pathname,flags,mode,callback) |
419 |
SV * pathname |
420 |
int flags |
421 |
int mode |
422 |
SV * callback |
423 |
PROTOTYPE: $$$$ |
424 |
CODE: |
425 |
{ |
426 |
aio_req req; |
427 |
|
428 |
Newz (0, req, 1, aio_cb); |
429 |
|
430 |
if (!req) |
431 |
croak ("out of memory during aio_req allocation"); |
432 |
|
433 |
req->type = REQ_OPEN; |
434 |
req->data = newSVsv (pathname); |
435 |
req->dataptr = SvPV_nolen (req->data); |
436 |
req->fd = flags; |
437 |
req->mode = mode; |
438 |
req->callback = SvREFCNT_inc (callback); |
439 |
|
440 |
send_req (req); |
441 |
} |
442 |
|
443 |
void |
444 |
aio_close(fh,callback) |
445 |
InputStream fh |
446 |
SV * callback |
447 |
PROTOTYPE: $$ |
448 |
ALIAS: |
449 |
aio_close = REQ_CLOSE |
450 |
aio_fsync = REQ_FSYNC |
451 |
aio_fdatasync = REQ_FDATASYNC |
452 |
CODE: |
453 |
{ |
454 |
aio_req req; |
455 |
|
456 |
Newz (0, req, 1, aio_cb); |
457 |
|
458 |
if (!req) |
459 |
croak ("out of memory during aio_req allocation"); |
460 |
|
461 |
req->type = ix; |
462 |
req->fd = PerlIO_fileno (fh); |
463 |
req->callback = SvREFCNT_inc (callback); |
464 |
|
465 |
send_req (req); |
466 |
} |
467 |
|
468 |
void |
469 |
aio_read(fh,offset,length,data,dataoffset,callback) |
470 |
InputStream fh |
471 |
UV offset |
472 |
IV length |
473 |
SV * data |
474 |
IV dataoffset |
475 |
SV * callback |
476 |
PROTOTYPE: $$$$$$ |
477 |
CODE: |
478 |
read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
479 |
|
480 |
void |
481 |
aio_write(fh,offset,length,data,dataoffset,callback) |
482 |
OutputStream fh |
483 |
UV offset |
484 |
IV length |
485 |
SV * data |
486 |
IV dataoffset |
487 |
SV * callback |
488 |
PROTOTYPE: $$$$$$ |
489 |
CODE: |
490 |
read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
491 |
|
492 |
void |
493 |
aio_readahead(fh,offset,length,callback) |
494 |
InputStream fh |
495 |
UV offset |
496 |
IV length |
497 |
SV * callback |
498 |
PROTOTYPE: $$$$ |
499 |
CODE: |
500 |
{ |
501 |
aio_req req; |
502 |
|
503 |
if (length < 0) |
504 |
croak ("length must not be negative"); |
505 |
|
506 |
Newz (0, req, 1, aio_cb); |
507 |
|
508 |
if (!req) |
509 |
croak ("out of memory during aio_req allocation"); |
510 |
|
511 |
req->type = REQ_READAHEAD; |
512 |
req->fd = PerlIO_fileno (fh); |
513 |
req->offset = offset; |
514 |
req->length = length; |
515 |
req->callback = SvREFCNT_inc (callback); |
516 |
|
517 |
send_req (req); |
518 |
} |
519 |
|
520 |
void |
521 |
aio_stat(fh_or_path,callback) |
522 |
SV * fh_or_path |
523 |
SV * callback |
524 |
PROTOTYPE: $$ |
525 |
ALIAS: |
526 |
aio_lstat = 1 |
527 |
CODE: |
528 |
{ |
529 |
aio_req req; |
530 |
|
531 |
Newz (0, req, 1, aio_cb); |
532 |
|
533 |
if (!req) |
534 |
croak ("out of memory during aio_req allocation"); |
535 |
|
536 |
New (0, req->statdata, 1, Stat_t); |
537 |
|
538 |
if (!req->statdata) |
539 |
croak ("out of memory during aio_req->statdata allocation"); |
540 |
|
541 |
if (SvPOK (fh_or_path)) |
542 |
{ |
543 |
req->type = ix ? REQ_LSTAT : REQ_STAT; |
544 |
req->data = newSVsv (fh_or_path); |
545 |
req->dataptr = SvPV_nolen (req->data); |
546 |
} |
547 |
else |
548 |
{ |
549 |
req->type = REQ_FSTAT; |
550 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
551 |
} |
552 |
|
553 |
req->callback = SvREFCNT_inc (callback); |
554 |
|
555 |
send_req (req); |
556 |
} |
557 |
|
558 |
void |
559 |
aio_unlink(pathname,callback) |
560 |
SV * pathname |
561 |
SV * callback |
562 |
PROTOTYPE: $$ |
563 |
CODE: |
564 |
{ |
565 |
aio_req req; |
566 |
|
567 |
Newz (0, req, 1, aio_cb); |
568 |
|
569 |
if (!req) |
570 |
croak ("out of memory during aio_req allocation"); |
571 |
|
572 |
req->type = REQ_UNLINK; |
573 |
req->data = newSVsv (pathname); |
574 |
req->dataptr = SvPV_nolen (req->data); |
575 |
req->callback = SvREFCNT_inc (callback); |
576 |
|
577 |
send_req (req); |
578 |
} |
579 |
|
580 |
int |
581 |
poll_fileno() |
582 |
PROTOTYPE: |
583 |
CODE: |
584 |
RETVAL = respipe [0]; |
585 |
OUTPUT: |
586 |
RETVAL |
587 |
|
588 |
int |
589 |
poll_cb(...) |
590 |
PROTOTYPE: |
591 |
CODE: |
592 |
RETVAL = poll_cb (aTHX); |
593 |
OUTPUT: |
594 |
RETVAL |
595 |
|
596 |
void |
597 |
poll_wait() |
598 |
PROTOTYPE: |
599 |
CODE: |
600 |
if (nreqs) |
601 |
poll_wait (); |
602 |
|
603 |
int |
604 |
nreqs() |
605 |
PROTOTYPE: |
606 |
CODE: |
607 |
RETVAL = nreqs; |
608 |
OUTPUT: |
609 |
RETVAL |
610 |
|