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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.2 by root, Sun Jul 10 18:16:49 2005 UTC vs.
Revision 1.13 by root, Fri Jul 22 08:25:22 2005 UTC

1#define PERL_NO_GET_CONTEXT 1#define _XOPEN_SOURCE 500
2 2
3#include "EXTERN.h" 3#include "EXTERN.h"
4#include "perl.h" 4#include "perl.h"
5#include "XSUB.h" 5#include "XSUB.h"
6 6
7#include <sys/types.h> 7#include <sys/types.h>
8#include <sys/stat.h> 8#include <sys/stat.h>
9
9#include <unistd.h> 10#include <unistd.h>
10#include <fcntl.h> 11#include <fcntl.h>
11#include <signal.h> 12#include <signal.h>
12#include <sched.h> 13#include <sched.h>
13#include <endian.h> 14#if __linux
15#include <sys/syscall.h>
16#endif
14 17
15#include <pthread.h> 18#include <pthread.h>
16#include <sys/syscall.h>
17 19
18typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 20typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */
19typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 21typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
20typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 22typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
21 23
22#if __i386 || __amd64
23# define STACKSIZE ( 256 * sizeof (long))
24#elif __ia64 24#if __ia64
25# define STACKSIZE (8192 * sizeof (long)) 25# define STACKSIZE 65536
26#else 26#else
27# define STACKSIZE ( 512 * sizeof (long)) 27# define STACKSIZE 4096
28#endif 28#endif
29 29
30enum { 30enum {
31 REQ_QUIT, 31 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 32 REQ_OPEN, REQ_CLOSE,
… …
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
35 REQ_FSYNC, REQ_FDATASYNC, 35 REQ_FSYNC, REQ_FDATASYNC,
36}; 36};
37 37
38typedef struct aio_cb { 38typedef struct aio_cb {
39 struct aio_cb *next; 39 struct aio_cb *volatile next;
40 40
41 int type; 41 int type;
42 42
43 int fd; 43 int fd;
44 off_t offset; 44 off_t offset;
45 size_t length; 45 size_t length;
46 ssize_t result; 46 ssize_t result;
47 mode_t mode; /* open */ 47 mode_t mode; /* open */
48 int errorno; 48 int errorno;
49 SV *data, *callback; 49 SV *data, *callback, *fh;
50 void *dataptr; 50 void *dataptr;
51 STRLEN dataoffset; 51 STRLEN dataoffset;
52 52
53 Stat_t *statdata; 53 Stat_t *statdata;
54} aio_cb; 54} aio_cb;
55 55
56typedef aio_cb *aio_req; 56typedef aio_cb *aio_req;
57 57
58static int started; 58static int started;
59static int nreqs; 59static volatile int nreqs;
60static int max_outstanding = 1<<30;
60static int reqpipe[2], respipe[2]; 61static int respipe [2];
61 62
63static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
64static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
65static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66
62static aio_req qs, qe; /* queue start, queue end */ 67static volatile aio_req reqs, reqe; /* queue start, queue end */
63 68static volatile aio_req ress, rese; /* queue start, queue end */
64static void *aio_proc(void *arg);
65
66static void
67start_thread (void)
68{
69 sigset_t fullsigset, oldsigset;
70 pthread_t tid;
71 pthread_attr_t attr;
72
73 pthread_attr_init (&attr);
74 pthread_attr_setstacksize (&attr, STACKSIZE);
75 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
76
77 sigfillset (&fullsigset);
78 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
79
80 if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
81 started++;
82
83 sigprocmask (SIG_SETMASK, &oldsigset, 0);
84}
85
86static void
87send_reqs (void)
88{
89 /* this write is atomic */
90 while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
91 {
92 qs = qs->next;
93 if (!qs) qe = 0;
94 }
95}
96
97static void
98send_req (aio_req req)
99{
100 nreqs++;
101 req->next = 0;
102
103 if (qe)
104 {
105 qe->next = req;
106 qe = req;
107 }
108 else
109 qe = qs = req;
110
111 send_reqs ();
112}
113
114static void
115end_thread (void)
116{
117 aio_req req;
118 New (0, req, 1, aio_cb);
119 req->type = REQ_QUIT;
120
121 send_req (req);
122}
123
124static void
125read_write (pTHX_
126 int dowrite, int fd, off_t offset, size_t length,
127 SV *data, STRLEN dataoffset, SV *callback)
128{
129 aio_req req;
130 STRLEN svlen;
131 char *svptr = SvPV (data, svlen);
132
133 SvUPGRADE (data, SVt_PV);
134 SvPOK_on (data);
135
136 if (dataoffset < 0)
137 dataoffset += svlen;
138
139 if (dataoffset < 0 || dataoffset > svlen)
140 croak ("data offset outside of string");
141
142 if (dowrite)
143 {
144 /* write: check length and adjust. */
145 if (length < 0 || length + dataoffset > svlen)
146 length = svlen - dataoffset;
147 }
148 else
149 {
150 /* read: grow scalar as necessary */
151 svptr = SvGROW (data, length + dataoffset);
152 }
153
154 if (length < 0)
155 croak ("length must not be negative");
156
157 Newz (0, req, 1, aio_cb);
158
159 if (!req)
160 croak ("out of memory during aio_req allocation");
161
162 req->type = dowrite ? REQ_WRITE : REQ_READ;
163 req->fd = fd;
164 req->offset = offset;
165 req->length = length;
166 req->data = SvREFCNT_inc (data);
167 req->dataptr = (char *)svptr + dataoffset;
168 req->callback = SvREFCNT_inc (callback);
169
170 send_req (req);
171}
172 69
173static void 70static void
174poll_wait () 71poll_wait ()
175{ 72{
73 if (nreqs && !ress)
74 {
176 fd_set rfd; 75 fd_set rfd;
177 FD_ZERO(&rfd); 76 FD_ZERO(&rfd);
178 FD_SET(respipe[0], &rfd); 77 FD_SET(respipe [0], &rfd);
179 78
180 select (respipe[0] + 1, &rfd, 0, 0, 0); 79 select (respipe [0] + 1, &rfd, 0, 0, 0);
80 }
181} 81}
182 82
183static int 83static int
184poll_cb (pTHX) 84poll_cb ()
185{ 85{
186 dSP; 86 dSP;
187 int count = 0; 87 int count = 0;
188 aio_req req; 88 aio_req req, prv;
189 89
190 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 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)
191 { 105 {
192 nreqs--; 106 nreqs--;
193 107
194 if (req->type == REQ_QUIT) 108 if (req->type == REQ_QUIT)
195 started--; 109 started--;
… …
203 + req->result > 0 ? req->result : 0); 117 + req->result > 0 ? req->result : 0);
204 118
205 if (req->data) 119 if (req->data)
206 SvREFCNT_dec (req->data); 120 SvREFCNT_dec (req->data);
207 121
122 if (req->fh)
123 SvREFCNT_dec (req->fh);
124
208 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) 125 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
209 { 126 {
210 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 127 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
211 PL_laststatval = req->result; 128 PL_laststatval = req->result;
212 PL_statcache = *(req->statdata); 129 PL_statcache = *(req->statdata);
213 130
214 Safefree (req->statdata); 131 Safefree (req->statdata);
215 } 132 }
216 133
134 ENTER;
217 PUSHMARK (SP); 135 PUSHMARK (SP);
218 XPUSHs (sv_2mortal (newSViv (req->result))); 136 XPUSHs (sv_2mortal (newSViv (req->result)));
219 137
220 if (req->type == REQ_OPEN) 138 if (req->type == REQ_OPEN)
221 { 139 {
… …
224 142
225 PUTBACK; 143 PUTBACK;
226 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 144 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
227 SPAGAIN; 145 SPAGAIN;
228 146
229 fh = POPs; 147 fh = SvREFCNT_inc (POPs);
230 148
231 PUSHMARK (SP); 149 PUSHMARK (SP);
232 XPUSHs (fh); 150 XPUSHs (sv_2mortal (fh));
233 } 151 }
234 152
153 if (SvOK (req->callback))
154 {
235 PUTBACK; 155 PUTBACK;
236 call_sv (req->callback, G_VOID | G_EVAL); 156 call_sv (req->callback, G_VOID | G_EVAL);
237 SPAGAIN; 157 SPAGAIN;
158 }
159
160 LEAVE;
238 161
239 if (req->callback) 162 if (req->callback)
240 SvREFCNT_dec (req->callback); 163 SvREFCNT_dec (req->callback);
241 164
242 errno = errorno; 165 errno = errorno;
243 count++; 166 count++;
244 } 167 }
245 168
169 prv = req;
170 req = req->next;
246 Safefree (req); 171 Safefree (prv);
172
173 /* TODO: croak on errors? */
247 } 174 }
248 175
249 if (qs)
250 send_reqs ();
251
252 return count; 176 return count;
177}
178
179static void *aio_proc(void *arg);
180
181static void
182start_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
201static void
202send_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
228static void
229end_thread (void)
230{
231 aio_req req;
232 New (0, req, 1, aio_cb);
233 req->type = REQ_QUIT;
234
235 send_req (req);
253} 236}
254 237
255static void * 238static void *
256aio_proc (void *thr_arg) 239aio_proc (void *thr_arg)
257{ 240{
258 aio_req req; 241 aio_req req;
242 int type;
259 243
260 /* then loop */ 244 do
261 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
262 { 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
263 errno = 0; /* strictly unnecessary */ 266 errno = 0; /* strictly unnecessary */
264 267
268 type = req->type;
269
265 switch (req->type) 270 switch (type)
266 { 271 {
267 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; 272 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
268 case REQ_WRITE: req->result = pwrite64 (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;
269#if SYS_readahead 274#if SYS_readahead
270 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 275 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
271#else 276#else
272 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break; 277 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
273#endif 278#endif
… …
282 287
283 case REQ_FSYNC: req->result = fsync (req->fd); break; 288 case REQ_FSYNC: req->result = fsync (req->fd); break;
284 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 289 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
285 290
286 case REQ_QUIT: 291 case REQ_QUIT:
287 write (respipe[1], (void *)&req, sizeof (req)); 292 break;
288 return 0;
289 293
290 default: 294 default:
291 req->result = ENOSYS; 295 req->result = ENOSYS;
292 break; 296 break;
293 } 297 }
294 298
295 req->errorno = errno; 299 req->errorno = errno;
296 write (respipe[1], (void *)&req, sizeof (req)); 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);
297 } 319 }
320 while (type != REQ_QUIT);
298 321
299 return 0; 322 return 0;
300} 323}
301 324
302MODULE = IO::AIO PACKAGE = IO::AIO 325MODULE = IO::AIO PACKAGE = IO::AIO
303 326
327PROTOTYPES: ENABLE
328
304BOOT: 329BOOT:
305{ 330{
306 if (pipe (reqpipe) || pipe (respipe)) 331 if (pipe (respipe))
307 croak ("unable to initialize request or result pipe"); 332 croak ("unable to initialize result pipe");
308 333
309 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) 334 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
310 croak ("cannot set result pipe to nonblocking mode"); 335 croak ("cannot set result pipe to nonblocking mode");
311 336
312 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) 337 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
313 croak ("cannot set result pipe to nonblocking mode"); 338 croak ("cannot set result pipe to nonblocking mode");
314} 339}
315 340
316void 341void
317min_parallel(nthreads) 342min_parallel(nthreads)
… …
335 } 360 }
336 361
337 while (started > nthreads) 362 while (started > nthreads)
338 { 363 {
339 poll_wait (); 364 poll_wait ();
340 poll_cb (aTHX); 365 poll_cb ();
341 } 366 }
342} 367}
343 368
369int
370max_outstanding(nreqs)
371 int nreqs
372 PROTOTYPE: $
373 CODE:
374 RETVAL = max_outstanding;
375 max_outstanding = nreqs;
376
344void 377void
345aio_open(pathname,flags,mode,callback) 378aio_open(pathname,flags,mode,callback=&PL_sv_undef)
346 SV * pathname 379 SV * pathname
347 int flags 380 int flags
348 int mode 381 int mode
349 SV * callback 382 SV * callback
350 PROTOTYPE: $$$$ 383 PROTOTYPE: $$$;$
351 CODE: 384 CODE:
352{ 385{
353 aio_req req; 386 aio_req req;
354 387
355 Newz (0, req, 1, aio_cb); 388 Newz (0, req, 1, aio_cb);
… …
366 399
367 send_req (req); 400 send_req (req);
368} 401}
369 402
370void 403void
371aio_close(fh,callback) 404aio_close(fh,callback=&PL_sv_undef)
372 InputStream fh 405 SV * fh
373 SV * callback 406 SV * callback
374 PROTOTYPE: $$ 407 PROTOTYPE: $;$
375 ALIAS: 408 ALIAS:
376 aio_close = REQ_CLOSE 409 aio_close = REQ_CLOSE
377 aio_fsync = REQ_FSYNC 410 aio_fsync = REQ_FSYNC
378 aio_fdatasync = REQ_FDATASYNC 411 aio_fdatasync = REQ_FDATASYNC
379 CODE: 412 CODE:
… …
384 417
385 if (!req) 418 if (!req)
386 croak ("out of memory during aio_req allocation"); 419 croak ("out of memory during aio_req allocation");
387 420
388 req->type = ix; 421 req->type = ix;
422 req->fh = newSVsv (fh);
389 req->fd = PerlIO_fileno (fh); 423 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
390 req->callback = SvREFCNT_inc (callback); 424 req->callback = SvREFCNT_inc (callback);
391 425
392 send_req (req); 426 send_req (req);
393} 427}
394 428
395void 429void
396aio_read(fh,offset,length,data,dataoffset,callback) 430aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
397 InputStream fh 431 SV * fh
398 UV offset 432 UV offset
399 IV length 433 IV length
400 SV * data 434 SV * data
401 IV dataoffset 435 IV dataoffset
402 SV * callback 436 SV * callback
437 ALIAS:
438 aio_read = REQ_READ
439 aio_write = REQ_WRITE
403 PROTOTYPE: $$$$$$ 440 PROTOTYPE: $$$$$;$
404 CODE: 441 CODE:
405 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
406
407void
408aio_write(fh,offset,length,data,dataoffset,callback)
409 OutputStream fh
410 UV offset
411 IV length
412 SV * data
413 IV dataoffset
414 SV * callback
415 PROTOTYPE: $$$$$$
416 CODE:
417 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
418
419void
420aio_readahead(fh,offset,length,callback)
421 InputStream fh
422 UV offset
423 IV length
424 SV * callback
425 PROTOTYPE: $$$$
426 CODE:
427{ 442{
428 aio_req req; 443 aio_req req;
444 STRLEN svlen;
445 char *svptr = SvPV (data, svlen);
446
447 SvUPGRADE (data, SVt_PV);
448 SvPOK_on (data);
449
450 if (dataoffset < 0)
451 dataoffset += svlen;
452
453 if (dataoffset < 0 || dataoffset > svlen)
454 croak ("data offset outside of string");
455
456 if (ix == REQ_WRITE)
457 {
458 /* write: check length and adjust. */
459 if (length < 0 || length + dataoffset > svlen)
460 length = svlen - dataoffset;
461 }
462 else
463 {
464 /* read: grow scalar as necessary */
465 svptr = SvGROW (data, length + dataoffset);
466 }
429 467
430 if (length < 0) 468 if (length < 0)
431 croak ("length must not be negative"); 469 croak ("length must not be negative");
432 470
433 Newz (0, req, 1, aio_cb); 471 Newz (0, req, 1, aio_cb);
434 472
435 if (!req) 473 if (!req)
436 croak ("out of memory during aio_req allocation"); 474 croak ("out of memory during aio_req allocation");
437 475
476 req->type = ix;
477 req->fh = newSVsv (fh);
478 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
479 : IoOFP (sv_2io (fh)));
480 req->offset = offset;
481 req->length = length;
482 req->data = SvREFCNT_inc (data);
483 req->dataptr = (char *)svptr + dataoffset;
484 req->callback = SvREFCNT_inc (callback);
485
486 send_req (req);
487}
488
489void
490aio_readahead(fh,offset,length,callback=&PL_sv_undef)
491 SV * fh
492 UV offset
493 IV length
494 SV * callback
495 PROTOTYPE: $$$;$
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
438 req->type = REQ_READAHEAD; 508 req->type = REQ_READAHEAD;
509 req->fh = newSVsv (fh);
439 req->fd = PerlIO_fileno (fh); 510 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
440 req->offset = offset; 511 req->offset = offset;
441 req->length = length; 512 req->length = length;
442 req->callback = SvREFCNT_inc (callback); 513 req->callback = SvREFCNT_inc (callback);
443 514
444 send_req (req); 515 send_req (req);
445} 516}
446 517
447void 518void
448aio_stat(fh_or_path,callback) 519aio_stat(fh_or_path,callback=&PL_sv_undef)
449 SV * fh_or_path 520 SV * fh_or_path
450 SV * callback 521 SV * callback
451 PROTOTYPE: $$
452 ALIAS: 522 ALIAS:
523 aio_stat = REQ_STAT
453 aio_lstat = 1 524 aio_lstat = REQ_LSTAT
454 CODE: 525 CODE:
455{ 526{
456 aio_req req; 527 aio_req req;
457 528
458 Newz (0, req, 1, aio_cb); 529 Newz (0, req, 1, aio_cb);
… …
465 if (!req->statdata) 536 if (!req->statdata)
466 croak ("out of memory during aio_req->statdata allocation"); 537 croak ("out of memory during aio_req->statdata allocation");
467 538
468 if (SvPOK (fh_or_path)) 539 if (SvPOK (fh_or_path))
469 { 540 {
470 req->type = ix ? REQ_LSTAT : REQ_STAT; 541 req->type = ix;
471 req->data = newSVsv (fh_or_path); 542 req->data = newSVsv (fh_or_path);
472 req->dataptr = SvPV_nolen (req->data); 543 req->dataptr = SvPV_nolen (req->data);
473 } 544 }
474 else 545 else
475 { 546 {
476 req->type = REQ_FSTAT; 547 req->type = REQ_FSTAT;
548 req->fh = newSVsv (fh_or_path);
477 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 549 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
478 } 550 }
479 551
480 req->callback = SvREFCNT_inc (callback); 552 req->callback = SvREFCNT_inc (callback);
481 553
482 send_req (req); 554 send_req (req);
483} 555}
484 556
485void 557void
486aio_unlink(pathname,callback) 558aio_unlink(pathname,callback=&PL_sv_undef)
487 SV * pathname 559 SV * pathname
488 SV * callback 560 SV * callback
489 PROTOTYPE: $$
490 CODE: 561 CODE:
491{ 562{
492 aio_req req; 563 aio_req req;
493 564
494 Newz (0, req, 1, aio_cb); 565 Newz (0, req, 1, aio_cb);
… …
502 req->callback = SvREFCNT_inc (callback); 573 req->callback = SvREFCNT_inc (callback);
503 574
504 send_req (req); 575 send_req (req);
505} 576}
506 577
578void
579flush()
580 PROTOTYPE:
581 CODE:
582 while (nreqs)
583 {
584 poll_wait ();
585 poll_cb ();
586 }
587
588void
589poll()
590 PROTOTYPE:
591 CODE:
592 if (nreqs)
593 {
594 poll_wait ();
595 poll_cb ();
596 }
597
507int 598int
508poll_fileno() 599poll_fileno()
509 PROTOTYPE: 600 PROTOTYPE:
510 CODE: 601 CODE:
511 RETVAL = respipe[0]; 602 RETVAL = respipe [0];
512 OUTPUT: 603 OUTPUT:
513 RETVAL 604 RETVAL
514 605
515int 606int
516poll_cb(...) 607poll_cb(...)
517 PROTOTYPE: 608 PROTOTYPE:
518 CODE: 609 CODE:
519 RETVAL = poll_cb (aTHX); 610 RETVAL = poll_cb ();
520 OUTPUT: 611 OUTPUT:
521 RETVAL 612 RETVAL
522 613
523void 614void
524poll_wait() 615poll_wait()
525 PROTOTYPE: 616 PROTOTYPE:
526 CODE: 617 CODE:
618 if (nreqs)
527 poll_wait (); 619 poll_wait ();
528 620
529int 621int
530nreqs() 622nreqs()
531 PROTOTYPE: 623 PROTOTYPE:
532 CODE: 624 CODE:

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