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> |
12 |
#include <sched.h> |
13 |
#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 __i386 || __amd64 |
23 |
# define STACKSIZE ( 256 * sizeof (long)) |
24 |
#elif __ia64 |
25 |
# define STACKSIZE (8192 * sizeof (long)) |
26 |
#else |
27 |
# define STACKSIZE ( 512 * sizeof (long)) |
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; |
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 int nreqs; |
60 |
static int respipe [2]; |
61 |
|
62 |
static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; |
63 |
static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; |
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static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
65 |
|
66 |
static volatile aio_req reqs, reqe; /* queue start, queue end */ |
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static volatile aio_req ress, rese; /* queue start, queue end */ |
68 |
|
69 |
static void *aio_proc(void *arg); |
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|
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static void |
72 |
start_thread (void) |
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{ |
74 |
sigset_t fullsigset, oldsigset; |
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pthread_t tid; |
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pthread_attr_t attr; |
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|
78 |
pthread_attr_init (&attr); |
79 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
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pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
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|
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sigfillset (&fullsigset); |
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sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
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|
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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); |
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} |
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|
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static void |
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send_req (aio_req req) |
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{ |
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nreqs++; |
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|
96 |
pthread_mutex_lock (&reqlock); |
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|
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req->next = 0; |
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|
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if (reqe) |
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{ |
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reqe->next = req; |
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reqe = req; |
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} |
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else |
106 |
reqe = reqs = req; |
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|
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pthread_cond_signal (&reqwait); |
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pthread_mutex_unlock (&reqlock); |
110 |
} |
111 |
|
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static void |
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end_thread (void) |
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{ |
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aio_req req; |
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New (0, req, 1, aio_cb); |
117 |
req->type = REQ_QUIT; |
118 |
|
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send_req (req); |
120 |
} |
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|
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static void |
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read_write (pTHX_ |
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int dowrite, int fd, off_t offset, size_t length, |
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SV *data, STRLEN dataoffset, SV *callback) |
126 |
{ |
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aio_req req; |
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STRLEN svlen; |
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char *svptr = SvPV (data, svlen); |
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|
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SvUPGRADE (data, SVt_PV); |
132 |
SvPOK_on (data); |
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|
134 |
if (dataoffset < 0) |
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dataoffset += svlen; |
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|
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if (dataoffset < 0 || dataoffset > svlen) |
138 |
croak ("data offset outside of string"); |
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|
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if (dowrite) |
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{ |
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/* write: check length and adjust. */ |
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if (length < 0 || length + dataoffset > svlen) |
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length = svlen - dataoffset; |
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} |
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else |
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{ |
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/* read: grow scalar as necessary */ |
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svptr = SvGROW (data, length + dataoffset); |
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} |
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|
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if (length < 0) |
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croak ("length must not be negative"); |
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|
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Newz (0, req, 1, aio_cb); |
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|
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if (!req) |
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croak ("out of memory during aio_req allocation"); |
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|
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req->type = dowrite ? REQ_WRITE : REQ_READ; |
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req->fd = fd; |
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req->offset = offset; |
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req->length = length; |
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req->data = SvREFCNT_inc (data); |
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req->dataptr = (char *)svptr + dataoffset; |
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req->callback = SvREFCNT_inc (callback); |
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|
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send_req (req); |
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} |
170 |
|
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static void |
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poll_wait () |
173 |
{ |
174 |
if (!nreqs) |
175 |
return; |
176 |
|
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fd_set rfd; |
178 |
FD_ZERO(&rfd); |
179 |
FD_SET(respipe [0], &rfd); |
180 |
|
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select (respipe [0] + 1, &rfd, 0, 0, 0); |
182 |
} |
183 |
|
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static int |
185 |
poll_cb (pTHX) |
186 |
{ |
187 |
dSP; |
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int count = 0; |
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aio_req req; |
190 |
|
191 |
{ |
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/* read and signals sent by the worker threads */ |
193 |
char buf [32]; |
194 |
while (read (respipe [0], buf, 32) > 0) |
195 |
; |
196 |
} |
197 |
|
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for (;;) |
199 |
{ |
200 |
pthread_mutex_lock (&reslock); |
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|
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req = ress; |
203 |
|
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if (ress) |
205 |
{ |
206 |
ress = ress->next; |
207 |
if (!ress) rese = 0; |
208 |
} |
209 |
|
210 |
pthread_mutex_unlock (&reslock); |
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|
212 |
if (!req) |
213 |
break; |
214 |
|
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nreqs--; |
216 |
|
217 |
if (req->type == REQ_QUIT) |
218 |
started--; |
219 |
else |
220 |
{ |
221 |
int errorno = errno; |
222 |
errno = req->errorno; |
223 |
|
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if (req->type == REQ_READ) |
225 |
SvCUR_set (req->data, req->dataoffset |
226 |
+ req->result > 0 ? req->result : 0); |
227 |
|
228 |
if (req->data) |
229 |
SvREFCNT_dec (req->data); |
230 |
|
231 |
if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
232 |
{ |
233 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
234 |
PL_laststatval = req->result; |
235 |
PL_statcache = *(req->statdata); |
236 |
|
237 |
Safefree (req->statdata); |
238 |
} |
239 |
|
240 |
PUSHMARK (SP); |
241 |
XPUSHs (sv_2mortal (newSViv (req->result))); |
242 |
|
243 |
if (req->type == REQ_OPEN) |
244 |
{ |
245 |
/* convert fd to fh */ |
246 |
SV *fh; |
247 |
|
248 |
PUTBACK; |
249 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
250 |
SPAGAIN; |
251 |
|
252 |
fh = POPs; |
253 |
|
254 |
PUSHMARK (SP); |
255 |
XPUSHs (fh); |
256 |
} |
257 |
|
258 |
PUTBACK; |
259 |
call_sv (req->callback, G_VOID | G_EVAL); |
260 |
SPAGAIN; |
261 |
|
262 |
if (req->callback) |
263 |
SvREFCNT_dec (req->callback); |
264 |
|
265 |
errno = errorno; |
266 |
count++; |
267 |
} |
268 |
|
269 |
Safefree (req); |
270 |
} |
271 |
|
272 |
return count; |
273 |
} |
274 |
|
275 |
static void * |
276 |
aio_proc (void *thr_arg) |
277 |
{ |
278 |
aio_req req; |
279 |
int type; |
280 |
|
281 |
do |
282 |
{ |
283 |
pthread_mutex_lock (&reqlock); |
284 |
|
285 |
for (;;) |
286 |
{ |
287 |
req = reqs; |
288 |
|
289 |
if (reqs) |
290 |
{ |
291 |
reqs = reqs->next; |
292 |
if (!reqs) reqe = 0; |
293 |
} |
294 |
|
295 |
if (req) |
296 |
break; |
297 |
|
298 |
pthread_cond_wait (&reqwait, &reqlock); |
299 |
} |
300 |
|
301 |
pthread_mutex_unlock (&reqlock); |
302 |
|
303 |
errno = 0; /* strictly unnecessary */ |
304 |
|
305 |
type = req->type; |
306 |
|
307 |
switch (type) |
308 |
{ |
309 |
case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; |
310 |
case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; |
311 |
#if SYS_readahead |
312 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
313 |
#else |
314 |
case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break; |
315 |
#endif |
316 |
|
317 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
318 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
319 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
320 |
|
321 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
322 |
case REQ_CLOSE: req->result = close (req->fd); break; |
323 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
324 |
|
325 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
326 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
327 |
|
328 |
case REQ_QUIT: |
329 |
break; |
330 |
|
331 |
default: |
332 |
req->result = ENOSYS; |
333 |
break; |
334 |
} |
335 |
|
336 |
req->errorno = errno; |
337 |
|
338 |
pthread_mutex_lock (&reslock); |
339 |
|
340 |
req->next = 0; |
341 |
|
342 |
if (rese) |
343 |
{ |
344 |
rese->next = req; |
345 |
rese = req; |
346 |
} |
347 |
else |
348 |
{ |
349 |
rese = ress = req; |
350 |
|
351 |
/* write a dummy byte to the pipe so fh becomes ready */ |
352 |
write (respipe [1], &respipe, 1); |
353 |
} |
354 |
|
355 |
pthread_mutex_unlock (&reslock); |
356 |
} |
357 |
while (type != REQ_QUIT); |
358 |
|
359 |
return 0; |
360 |
} |
361 |
|
362 |
MODULE = IO::AIO PACKAGE = IO::AIO |
363 |
|
364 |
BOOT: |
365 |
{ |
366 |
if (pipe (respipe)) |
367 |
croak ("unable to initialize result pipe"); |
368 |
|
369 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
370 |
croak ("cannot set result pipe to nonblocking mode"); |
371 |
|
372 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
373 |
croak ("cannot set result pipe to nonblocking mode"); |
374 |
} |
375 |
|
376 |
void |
377 |
min_parallel(nthreads) |
378 |
int nthreads |
379 |
PROTOTYPE: $ |
380 |
CODE: |
381 |
while (nthreads > started) |
382 |
start_thread (); |
383 |
|
384 |
void |
385 |
max_parallel(nthreads) |
386 |
int nthreads |
387 |
PROTOTYPE: $ |
388 |
CODE: |
389 |
{ |
390 |
int cur = started; |
391 |
while (cur > nthreads) |
392 |
{ |
393 |
end_thread (); |
394 |
cur--; |
395 |
} |
396 |
|
397 |
while (started > nthreads) |
398 |
{ |
399 |
poll_wait (); |
400 |
poll_cb (aTHX); |
401 |
} |
402 |
} |
403 |
|
404 |
void |
405 |
aio_open(pathname,flags,mode,callback) |
406 |
SV * pathname |
407 |
int flags |
408 |
int mode |
409 |
SV * callback |
410 |
PROTOTYPE: $$$$ |
411 |
CODE: |
412 |
{ |
413 |
aio_req req; |
414 |
|
415 |
Newz (0, req, 1, aio_cb); |
416 |
|
417 |
if (!req) |
418 |
croak ("out of memory during aio_req allocation"); |
419 |
|
420 |
req->type = REQ_OPEN; |
421 |
req->data = newSVsv (pathname); |
422 |
req->dataptr = SvPV_nolen (req->data); |
423 |
req->fd = flags; |
424 |
req->mode = mode; |
425 |
req->callback = SvREFCNT_inc (callback); |
426 |
|
427 |
send_req (req); |
428 |
} |
429 |
|
430 |
void |
431 |
aio_close(fh,callback) |
432 |
InputStream fh |
433 |
SV * callback |
434 |
PROTOTYPE: $$ |
435 |
ALIAS: |
436 |
aio_close = REQ_CLOSE |
437 |
aio_fsync = REQ_FSYNC |
438 |
aio_fdatasync = REQ_FDATASYNC |
439 |
CODE: |
440 |
{ |
441 |
aio_req req; |
442 |
|
443 |
Newz (0, req, 1, aio_cb); |
444 |
|
445 |
if (!req) |
446 |
croak ("out of memory during aio_req allocation"); |
447 |
|
448 |
req->type = ix; |
449 |
req->fd = PerlIO_fileno (fh); |
450 |
req->callback = SvREFCNT_inc (callback); |
451 |
|
452 |
send_req (req); |
453 |
} |
454 |
|
455 |
void |
456 |
aio_read(fh,offset,length,data,dataoffset,callback) |
457 |
InputStream fh |
458 |
UV offset |
459 |
IV length |
460 |
SV * data |
461 |
IV dataoffset |
462 |
SV * callback |
463 |
PROTOTYPE: $$$$$$ |
464 |
CODE: |
465 |
read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
466 |
|
467 |
void |
468 |
aio_write(fh,offset,length,data,dataoffset,callback) |
469 |
OutputStream fh |
470 |
UV offset |
471 |
IV length |
472 |
SV * data |
473 |
IV dataoffset |
474 |
SV * callback |
475 |
PROTOTYPE: $$$$$$ |
476 |
CODE: |
477 |
read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
478 |
|
479 |
void |
480 |
aio_readahead(fh,offset,length,callback) |
481 |
InputStream fh |
482 |
UV offset |
483 |
IV length |
484 |
SV * callback |
485 |
PROTOTYPE: $$$$ |
486 |
CODE: |
487 |
{ |
488 |
aio_req req; |
489 |
|
490 |
if (length < 0) |
491 |
croak ("length must not be negative"); |
492 |
|
493 |
Newz (0, req, 1, aio_cb); |
494 |
|
495 |
if (!req) |
496 |
croak ("out of memory during aio_req allocation"); |
497 |
|
498 |
req->type = REQ_READAHEAD; |
499 |
req->fd = PerlIO_fileno (fh); |
500 |
req->offset = offset; |
501 |
req->length = length; |
502 |
req->callback = SvREFCNT_inc (callback); |
503 |
|
504 |
send_req (req); |
505 |
} |
506 |
|
507 |
void |
508 |
aio_stat(fh_or_path,callback) |
509 |
SV * fh_or_path |
510 |
SV * callback |
511 |
PROTOTYPE: $$ |
512 |
ALIAS: |
513 |
aio_lstat = 1 |
514 |
CODE: |
515 |
{ |
516 |
aio_req req; |
517 |
|
518 |
Newz (0, req, 1, aio_cb); |
519 |
|
520 |
if (!req) |
521 |
croak ("out of memory during aio_req allocation"); |
522 |
|
523 |
New (0, req->statdata, 1, Stat_t); |
524 |
|
525 |
if (!req->statdata) |
526 |
croak ("out of memory during aio_req->statdata allocation"); |
527 |
|
528 |
if (SvPOK (fh_or_path)) |
529 |
{ |
530 |
req->type = ix ? REQ_LSTAT : REQ_STAT; |
531 |
req->data = newSVsv (fh_or_path); |
532 |
req->dataptr = SvPV_nolen (req->data); |
533 |
} |
534 |
else |
535 |
{ |
536 |
req->type = REQ_FSTAT; |
537 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
538 |
} |
539 |
|
540 |
req->callback = SvREFCNT_inc (callback); |
541 |
|
542 |
send_req (req); |
543 |
} |
544 |
|
545 |
void |
546 |
aio_unlink(pathname,callback) |
547 |
SV * pathname |
548 |
SV * callback |
549 |
PROTOTYPE: $$ |
550 |
CODE: |
551 |
{ |
552 |
aio_req req; |
553 |
|
554 |
Newz (0, req, 1, aio_cb); |
555 |
|
556 |
if (!req) |
557 |
croak ("out of memory during aio_req allocation"); |
558 |
|
559 |
req->type = REQ_UNLINK; |
560 |
req->data = newSVsv (pathname); |
561 |
req->dataptr = SvPV_nolen (req->data); |
562 |
req->callback = SvREFCNT_inc (callback); |
563 |
|
564 |
send_req (req); |
565 |
} |
566 |
|
567 |
int |
568 |
poll_fileno() |
569 |
PROTOTYPE: |
570 |
CODE: |
571 |
RETVAL = respipe [0]; |
572 |
OUTPUT: |
573 |
RETVAL |
574 |
|
575 |
int |
576 |
poll_cb(...) |
577 |
PROTOTYPE: |
578 |
CODE: |
579 |
RETVAL = poll_cb (aTHX); |
580 |
OUTPUT: |
581 |
RETVAL |
582 |
|
583 |
void |
584 |
poll_wait() |
585 |
PROTOTYPE: |
586 |
CODE: |
587 |
if (nreqs) |
588 |
poll_wait (); |
589 |
|
590 |
int |
591 |
nreqs() |
592 |
PROTOTYPE: |
593 |
CODE: |
594 |
RETVAL = nreqs; |
595 |
OUTPUT: |
596 |
RETVAL |
597 |
|