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 |
|
14 |
typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
15 |
typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
16 |
typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
17 |
|
18 |
// 128 seems to be enough most everywhere. alpha needs 256. |
19 |
#define STACKSIZE (256 * sizeof (long)) |
20 |
|
21 |
enum { |
22 |
REQ_QUIT, |
23 |
REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE, |
24 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK |
25 |
}; |
26 |
|
27 |
typedef struct { |
28 |
char stack[STACKSIZE]; |
29 |
} aio_thread; |
30 |
|
31 |
typedef struct aio_cb { |
32 |
struct aio_cb *next; |
33 |
|
34 |
int type; |
35 |
aio_thread *thread; |
36 |
|
37 |
int fd; |
38 |
off_t offset; |
39 |
size_t length; |
40 |
ssize_t result; |
41 |
mode_t mode; /* open */ |
42 |
int errorno; |
43 |
SV *data, *callback; |
44 |
void *dataptr; |
45 |
STRLEN dataoffset; |
46 |
|
47 |
Stat_t *statdata; |
48 |
} aio_cb; |
49 |
|
50 |
typedef aio_cb *aio_req; |
51 |
|
52 |
static int started; |
53 |
static int nreqs; |
54 |
static int reqpipe[2], respipe[2]; |
55 |
|
56 |
static aio_req qs, qe; /* queue start, queue end */ |
57 |
|
58 |
static int aio_proc(void *arg); |
59 |
|
60 |
static void |
61 |
start_thread (void) |
62 |
{ |
63 |
aio_thread *thr; |
64 |
|
65 |
New (0, thr, 1, aio_thread); |
66 |
|
67 |
if (clone (aio_proc, |
68 |
&(thr->stack[STACKSIZE - sizeof (long)]), |
69 |
CLONE_VM|CLONE_FS|CLONE_FILES, |
70 |
thr) >= 0) |
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started++; |
72 |
else |
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Safefree (thr); |
74 |
} |
75 |
|
76 |
static void |
77 |
send_reqs (void) |
78 |
{ |
79 |
/* this write is atomic */ |
80 |
while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs) |
81 |
{ |
82 |
qs = qs->next; |
83 |
if (!qs) qe = 0; |
84 |
} |
85 |
} |
86 |
|
87 |
static void |
88 |
send_req (aio_req req) |
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{ |
90 |
nreqs++; |
91 |
req->next = 0; |
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|
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if (qe) |
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{ |
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qe->next = req; |
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qe = req; |
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} |
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else |
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qe = qs = req; |
100 |
|
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send_reqs (); |
102 |
} |
103 |
|
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static void |
105 |
end_thread (void) |
106 |
{ |
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aio_req req; |
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New (0, req, 1, aio_cb); |
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req->type = REQ_QUIT; |
110 |
|
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send_req (req); |
112 |
} |
113 |
|
114 |
static void |
115 |
read_write (pTHX_ |
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int dowrite, int fd, off_t offset, size_t length, |
117 |
SV *data, STRLEN dataoffset, SV *callback) |
118 |
{ |
119 |
aio_req req; |
120 |
STRLEN svlen; |
121 |
char *svptr = SvPV (data, svlen); |
122 |
|
123 |
SvUPGRADE (data, SVt_PV); |
124 |
SvPOK_on (data); |
125 |
|
126 |
if (dataoffset < 0) |
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dataoffset += svlen; |
128 |
|
129 |
if (dataoffset < 0 || dataoffset > svlen) |
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croak ("data offset outside of string"); |
131 |
|
132 |
if (dowrite) |
133 |
{ |
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/* write: check length and adjust. */ |
135 |
if (length < 0 || length + dataoffset > svlen) |
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length = svlen - dataoffset; |
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} |
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else |
139 |
{ |
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/* read: grow scalar as necessary */ |
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svptr = SvGROW (data, length + dataoffset); |
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} |
143 |
|
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if (length < 0) |
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croak ("length must not be negative"); |
146 |
|
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Newz (0, req, 1, aio_cb); |
148 |
|
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if (!req) |
150 |
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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} |
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|
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static void |
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poll_wait () |
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{ |
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fd_set rfd; |
167 |
FD_ZERO(&rfd); |
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FD_SET(respipe[0], &rfd); |
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|
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select (respipe[0] + 1, &rfd, 0, 0, 0); |
171 |
} |
172 |
|
173 |
static int |
174 |
poll_cb (pTHX) |
175 |
{ |
176 |
dSP; |
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int count = 0; |
178 |
aio_req req; |
179 |
|
180 |
while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
181 |
{ |
182 |
nreqs--; |
183 |
|
184 |
if (req->type == REQ_QUIT) |
185 |
{ |
186 |
Safefree (req->thread); |
187 |
started--; |
188 |
} |
189 |
else |
190 |
{ |
191 |
int errorno = errno; |
192 |
errno = req->errorno; |
193 |
|
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if (req->type == REQ_READ) |
195 |
SvCUR_set (req->data, req->dataoffset |
196 |
+ req->result > 0 ? req->result : 0); |
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|
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if (req->data) |
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SvREFCNT_dec (req->data); |
200 |
|
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if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
202 |
{ |
203 |
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); |
206 |
|
207 |
Safefree (req->statdata); |
208 |
} |
209 |
|
210 |
PUSHMARK (SP); |
211 |
XPUSHs (sv_2mortal (newSViv (req->result))); |
212 |
PUTBACK; |
213 |
call_sv (req->callback, G_VOID); |
214 |
SPAGAIN; |
215 |
|
216 |
if (req->callback) |
217 |
SvREFCNT_dec (req->callback); |
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|
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errno = errorno; |
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count++; |
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} |
222 |
|
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Safefree (req); |
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} |
225 |
|
226 |
if (qs) |
227 |
send_reqs (); |
228 |
|
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return count; |
230 |
} |
231 |
|
232 |
static sigset_t fullsigset; |
233 |
|
234 |
#undef errno |
235 |
#include <asm/unistd.h> |
236 |
#include <sys/prctl.h> |
237 |
|
238 |
#if __alpha || __ia64 || __hppa || __sparc64__ || __v850__ |
239 |
# define stat kernelstat |
240 |
# define stat64 kernelstat64 |
241 |
# include <asm/stat.h> |
242 |
# undef stat |
243 |
# undef stat64 |
244 |
#else |
245 |
# define kernelstat stat |
246 |
# define kernelstat64 stat64 |
247 |
#endif |
248 |
|
249 |
#define COPY_STATDATA \ |
250 |
req->statdata->st_dev = statdata.st_dev; \ |
251 |
req->statdata->st_ino = statdata.st_ino; \ |
252 |
req->statdata->st_mode = statdata.st_mode; \ |
253 |
req->statdata->st_nlink = statdata.st_nlink; \ |
254 |
req->statdata->st_uid = statdata.st_uid; \ |
255 |
req->statdata->st_gid = statdata.st_gid; \ |
256 |
req->statdata->st_rdev = statdata.st_rdev; \ |
257 |
req->statdata->st_size = statdata.st_size; \ |
258 |
req->statdata->st_atime = statdata.st_atime; \ |
259 |
req->statdata->st_mtime = statdata.st_mtime; \ |
260 |
req->statdata->st_ctime = statdata.st_ctime; \ |
261 |
req->statdata->st_blksize = statdata.st_blksize; \ |
262 |
req->statdata->st_blocks = statdata.st_blocks; \ |
263 |
|
264 |
static int |
265 |
aio_proc (void *thr_arg) |
266 |
{ |
267 |
aio_thread *thr = thr_arg; |
268 |
aio_req req; |
269 |
int errno; |
270 |
|
271 |
/* this is very much kernel-specific :(:(:( */ |
272 |
/* we rely on gcc's ability to create closures. */ |
273 |
_syscall3(int,read,int,fd,char *,buf,size_t,count) |
274 |
_syscall3(int,write,int,fd,char *,buf,size_t,count) |
275 |
|
276 |
_syscall3(int,open,char *,pathname,int,flags,mode_t,mode) |
277 |
_syscall1(int,close,int,fd) |
278 |
|
279 |
#if __NR_pread64 |
280 |
_syscall5(int,pread64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi) |
281 |
_syscall5(int,pwrite64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi) |
282 |
#elif __NR_pread |
283 |
_syscall4(int,pread,int,fd,char *,buf,size_t,count,offset_t,offset) |
284 |
_syscall4(int,pwrite,int,fd,char *,buf,size_t,count,offset_t,offset) |
285 |
#else |
286 |
# error "neither pread nor pread64 defined" |
287 |
#endif |
288 |
|
289 |
|
290 |
#if __NR_stat64 |
291 |
_syscall2(int,stat64, const char *, filename, struct kernelstat64 *, buf) |
292 |
_syscall2(int,lstat64, const char *, filename, struct kernelstat64 *, buf) |
293 |
_syscall2(int,fstat64, int, fd, struct kernelstat64 *, buf) |
294 |
#elif __NR_stat |
295 |
_syscall2(int,stat, const char *, filename, struct kernelstat *, buf) |
296 |
_syscall2(int,lstat, const char *, filename, struct kernelstat *, buf) |
297 |
_syscall2(int,fstat, int, fd, struct kernelstat *, buf) |
298 |
#else |
299 |
# error "neither stat64 nor stat defined" |
300 |
#endif |
301 |
|
302 |
_syscall1(int,unlink, char *, filename); |
303 |
|
304 |
sigprocmask (SIG_SETMASK, &fullsigset, 0); |
305 |
prctl (PR_SET_PDEATHSIG, SIGKILL); |
306 |
|
307 |
/* then loop */ |
308 |
while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
309 |
{ |
310 |
req->thread = thr; |
311 |
errno = 0; /* strictly unnecessary */ |
312 |
|
313 |
switch (req->type) |
314 |
{ |
315 |
#if __NR_pread64 |
316 |
case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break; |
317 |
case REQ_WRITE: req->result = pwrite64(req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break; |
318 |
#else |
319 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
320 |
case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
321 |
#endif |
322 |
#if __NR_stat64 |
323 |
struct kernelstat64 statdata; |
324 |
case REQ_STAT: req->result = stat64 (req->dataptr, &statdata); COPY_STATDATA; break; |
325 |
case REQ_LSTAT: req->result = lstat64 (req->dataptr, &statdata); COPY_STATDATA; break; |
326 |
case REQ_FSTAT: req->result = fstat64 (req->fd, &statdata); COPY_STATDATA; break; |
327 |
#else |
328 |
struct kernelstat statdata; |
329 |
case REQ_STAT: req->result = stat (req->dataptr, &statdata); COPY_STATDATA; break; |
330 |
case REQ_LSTAT: req->result = lstat (req->dataptr, &statdata); COPY_STATDATA; break; |
331 |
case REQ_FSTAT: req->result = fstat (req->fd, &statdata); COPY_STATDATA; break; |
332 |
#endif |
333 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
334 |
case REQ_CLOSE: req->result = close (req->fd); break; |
335 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
336 |
|
337 |
case REQ_QUIT: |
338 |
default: |
339 |
write (respipe[1], (void *)&req, sizeof (req)); |
340 |
return 0; |
341 |
} |
342 |
|
343 |
req->errorno = errno; |
344 |
write (respipe[1], (void *)&req, sizeof (req)); |
345 |
} |
346 |
|
347 |
return 0; |
348 |
} |
349 |
|
350 |
MODULE = Linux::AIO PACKAGE = Linux::AIO |
351 |
|
352 |
BOOT: |
353 |
{ |
354 |
sigfillset (&fullsigset); |
355 |
sigdelset (&fullsigset, SIGTERM); |
356 |
sigdelset (&fullsigset, SIGQUIT); |
357 |
sigdelset (&fullsigset, SIGABRT); |
358 |
sigdelset (&fullsigset, SIGINT); |
359 |
|
360 |
if (pipe (reqpipe) || pipe (respipe)) |
361 |
croak ("unable to initialize request or result pipe"); |
362 |
|
363 |
if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) |
364 |
croak ("cannot set result pipe to nonblocking mode"); |
365 |
|
366 |
if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) |
367 |
croak ("cannot set result pipe to nonblocking mode"); |
368 |
} |
369 |
|
370 |
void |
371 |
min_parallel(nthreads) |
372 |
int nthreads |
373 |
PROTOTYPE: $ |
374 |
CODE: |
375 |
while (nthreads > started) |
376 |
start_thread (); |
377 |
|
378 |
void |
379 |
max_parallel(nthreads) |
380 |
int nthreads |
381 |
PROTOTYPE: $ |
382 |
CODE: |
383 |
int cur = started; |
384 |
while (cur > nthreads) |
385 |
{ |
386 |
end_thread (); |
387 |
cur--; |
388 |
} |
389 |
|
390 |
while (started > nthreads) |
391 |
{ |
392 |
poll_wait (); |
393 |
poll_cb (aTHX); |
394 |
} |
395 |
|
396 |
void |
397 |
aio_open(pathname,flags,mode,callback) |
398 |
SV * pathname |
399 |
int flags |
400 |
int mode |
401 |
SV * callback |
402 |
PROTOTYPE: $$$$ |
403 |
CODE: |
404 |
aio_req req; |
405 |
|
406 |
Newz (0, req, 1, aio_cb); |
407 |
|
408 |
if (!req) |
409 |
croak ("out of memory during aio_req allocation"); |
410 |
|
411 |
req->type = REQ_OPEN; |
412 |
req->data = newSVsv (pathname); |
413 |
req->dataptr = SvPV_nolen (req->data); |
414 |
req->fd = flags; |
415 |
req->mode = mode; |
416 |
req->callback = SvREFCNT_inc (callback); |
417 |
|
418 |
send_req (req); |
419 |
|
420 |
void |
421 |
aio_close(fh,callback) |
422 |
InputStream fh |
423 |
SV * callback |
424 |
PROTOTYPE: $$ |
425 |
CODE: |
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_CLOSE; |
434 |
req->fd = PerlIO_fileno (fh); |
435 |
req->callback = SvREFCNT_inc (callback); |
436 |
|
437 |
send_req (req); |
438 |
|
439 |
void |
440 |
aio_read(fh,offset,length,data,dataoffset,callback) |
441 |
InputStream fh |
442 |
UV offset |
443 |
IV length |
444 |
SV * data |
445 |
IV dataoffset |
446 |
SV * callback |
447 |
PROTOTYPE: $$$$$$ |
448 |
CODE: |
449 |
read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
450 |
|
451 |
void |
452 |
aio_write(fh,offset,length,data,dataoffset,callback) |
453 |
OutputStream fh |
454 |
UV offset |
455 |
IV length |
456 |
SV * data |
457 |
IV dataoffset |
458 |
SV * callback |
459 |
PROTOTYPE: $$$$$$ |
460 |
CODE: |
461 |
read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
462 |
|
463 |
void |
464 |
aio_stat(fh_or_path,callback) |
465 |
SV * fh_or_path |
466 |
SV * callback |
467 |
PROTOTYPE: $$ |
468 |
ALIAS: |
469 |
aio_lstat = 1 |
470 |
CODE: |
471 |
aio_req req; |
472 |
|
473 |
Newz (0, req, 1, aio_cb); |
474 |
|
475 |
if (!req) |
476 |
croak ("out of memory during aio_req allocation"); |
477 |
|
478 |
New (0, req->statdata, 1, Stat_t); |
479 |
|
480 |
if (!req->statdata) |
481 |
croak ("out of memory during aio_req->statdata allocation"); |
482 |
|
483 |
if (SvPOK (fh_or_path)) |
484 |
{ |
485 |
req->type = ix ? REQ_LSTAT : REQ_STAT; |
486 |
req->data = newSVsv (fh_or_path); |
487 |
req->dataptr = SvPV_nolen (req->data); |
488 |
} |
489 |
else |
490 |
{ |
491 |
req->type = REQ_FSTAT; |
492 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
493 |
} |
494 |
|
495 |
req->callback = SvREFCNT_inc (callback); |
496 |
|
497 |
send_req (req); |
498 |
|
499 |
void |
500 |
aio_unlink(pathname,callback) |
501 |
SV * pathname |
502 |
SV * callback |
503 |
PROTOTYPE: $$ |
504 |
CODE: |
505 |
aio_req req; |
506 |
|
507 |
Newz (0, req, 1, aio_cb); |
508 |
|
509 |
if (!req) |
510 |
croak ("out of memory during aio_req allocation"); |
511 |
|
512 |
req->type = REQ_UNLINK; |
513 |
req->data = newSVsv (pathname); |
514 |
req->dataptr = SvPV_nolen (req->data); |
515 |
req->callback = SvREFCNT_inc (callback); |
516 |
|
517 |
send_req (req); |
518 |
|
519 |
int |
520 |
poll_fileno() |
521 |
PROTOTYPE: |
522 |
CODE: |
523 |
RETVAL = respipe[0]; |
524 |
OUTPUT: |
525 |
RETVAL |
526 |
|
527 |
int |
528 |
poll_cb(...) |
529 |
PROTOTYPE: |
530 |
CODE: |
531 |
RETVAL = poll_cb (aTHX); |
532 |
OUTPUT: |
533 |
RETVAL |
534 |
|
535 |
void |
536 |
poll_wait() |
537 |
PROTOTYPE: |
538 |
CODE: |
539 |
poll_wait (); |
540 |
|
541 |
int |
542 |
nreqs() |
543 |
PROTOTYPE: |
544 |
CODE: |
545 |
RETVAL = nreqs; |
546 |
OUTPUT: |
547 |
RETVAL |
548 |
|