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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.1 by root, Sun Jul 10 17:07:44 2005 UTC vs.
Revision 1.34 by root, Tue Aug 23 00:03:14 2005 UTC

1#define PERL_NO_GET_CONTEXT 1#define _REENTRANT 1
2#include <errno.h>
2 3
3#include "EXTERN.h" 4#include "EXTERN.h"
4#include "perl.h" 5#include "perl.h"
5#include "XSUB.h" 6#include "XSUB.h"
6 7
8#include "autoconf/config.h"
9
10#include <pthread.h>
11
7#include <sys/types.h> 12#include <sys/types.h>
8#include <sys/stat.h> 13#include <sys/stat.h>
14
9#include <unistd.h> 15#include <unistd.h>
10#include <fcntl.h> 16#include <fcntl.h>
11#include <signal.h> 17#include <signal.h>
12#include <sched.h> 18#include <sched.h>
13#include <endian.h>
14 19
15#include <pthread.h> 20#if HAVE_SENDFILE
21# if __linux
22# include <sys/sendfile.h>
23# elif __freebsd
16#include <sys/syscall.h> 24# include <sys/socket.h>
25# include <sys/uio.h>
26# elif __hpux
27# include <sys/socket.h>
28# else
29# error sendfile support requested but not available
30# endif
31#endif
17 32
18typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */
19typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
20typedef 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 33#if __ia64
25# define STACKSIZE (8192 * sizeof (long)) 34# define STACKSIZE 65536
26#else 35#else
27# define STACKSIZE ( 512 * sizeof (long)) 36# define STACKSIZE 4096
28#endif 37#endif
29 38
30enum { 39enum {
31 REQ_QUIT, 40 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 41 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 42 REQ_READ, REQ_WRITE, REQ_READAHEAD,
43 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 44 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 45 REQ_FSYNC, REQ_FDATASYNC,
46 REQ_UNLINK, REQ_RMDIR,
47 REQ_SYMLINK,
36}; 48};
37 49
38typedef struct aio_cb { 50typedef struct aio_cb {
39 struct aio_cb *next; 51 struct aio_cb *volatile next;
40 52
41 int type; 53 int type;
42 54
43 int fd; 55 int fd, fd2;
44 off_t offset; 56 off_t offset;
45 size_t length; 57 size_t length;
46 ssize_t result; 58 ssize_t result;
47 mode_t mode; /* open */ 59 mode_t mode; /* open */
48 int errorno; 60 int errorno;
49 SV *data, *callback; 61 SV *data, *callback;
50 void *dataptr; 62 SV *fh, *fh2;
63 void *dataptr, *data2ptr;
51 STRLEN dataoffset; 64 STRLEN dataoffset;
52 65
53 Stat_t *statdata; 66 Stat_t *statdata;
54} aio_cb; 67} aio_cb;
55 68
56typedef aio_cb *aio_req; 69typedef aio_cb *aio_req;
57 70
58static int started; 71static int started, wanted;
59static int nreqs; 72static volatile int nreqs;
73static int max_outstanding = 1<<30;
60static int reqpipe[2], respipe[2]; 74static int respipe [2];
61 75
76static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
77static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
78static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
79
62static aio_req qs, qe; /* queue start, queue end */ 80static volatile aio_req reqs, reqe; /* queue start, queue end */
81static volatile aio_req ress, rese; /* queue start, queue end */
63 82
64static void *aio_proc(void *arg); 83static void free_req (aio_req req)
65
66static void
67start_thread (void)
68{ 84{
69 sigset_t fullsigset, oldsigset; 85 if (req->data)
70 pthread_t tid; 86 SvREFCNT_dec (req->data);
71 pthread_attr_t attr;
72 87
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) 88 if (req->fh)
160 croak ("out of memory during aio_req allocation"); 89 SvREFCNT_dec (req->fh);
161 90
162 req->type = dowrite ? REQ_WRITE : REQ_READ; 91 if (req->fh2)
163 req->fd = fd; 92 SvREFCNT_dec (req->fh2);
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 93
170 send_req (req); 94 if (req->statdata)
95 Safefree (req->statdata);
96
97 if (req->callback)
98 SvREFCNT_dec (req->callback);
99
100 Safefree (req);
171} 101}
172 102
173static void 103static void
174poll_wait () 104poll_wait ()
175{ 105{
106 if (nreqs && !ress)
107 {
176 fd_set rfd; 108 fd_set rfd;
177 FD_ZERO(&rfd); 109 FD_ZERO(&rfd);
178 FD_SET(respipe[0], &rfd); 110 FD_SET(respipe [0], &rfd);
179 111
180 select (respipe[0] + 1, &rfd, 0, 0, 0); 112 select (respipe [0] + 1, &rfd, 0, 0, 0);
113 }
181} 114}
182 115
183static int 116static int
184poll_cb (pTHX) 117poll_cb ()
185{ 118{
186 dSP; 119 dSP;
187 int count = 0; 120 int count = 0;
121 int do_croak = 0;
188 aio_req req; 122 aio_req req;
189 123
190 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 124 for (;;)
191 { 125 {
126 pthread_mutex_lock (&reslock);
127 req = ress;
128
129 if (req)
130 {
131 ress = req->next;
132
133 if (!ress)
134 {
135 /* read any signals sent by the worker threads */
136 char buf [32];
137 while (read (respipe [0], buf, 32) == 32)
138 ;
139
140 rese = 0;
141 }
142 }
143
144 pthread_mutex_unlock (&reslock);
145
146 if (!req)
147 break;
148
192 nreqs--; 149 nreqs--;
193 150
194 if (req->type == REQ_QUIT) 151 if (req->type == REQ_QUIT)
195 started--; 152 started--;
196 else 153 else
197 { 154 {
198 int errorno = errno; 155 int errorno = errno;
199 errno = req->errorno; 156 errno = req->errorno;
200 157
201 if (req->type == REQ_READ) 158 if (req->type == REQ_READ)
202 SvCUR_set (req->data, req->dataoffset 159 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
203 + req->result > 0 ? req->result : 0);
204 160
161 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
162 SvREADONLY_off (req->data);
163
205 if (req->data) 164 if (req->statdata)
206 SvREFCNT_dec (req->data);
207
208 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
209 { 165 {
210 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 166 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
211 PL_laststatval = req->result; 167 PL_laststatval = req->result;
212 PL_statcache = *(req->statdata); 168 PL_statcache = *(req->statdata);
213
214 Safefree (req->statdata);
215 } 169 }
216 170
171 ENTER;
217 PUSHMARK (SP); 172 PUSHMARK (SP);
218 XPUSHs (sv_2mortal (newSViv (req->result))); 173 XPUSHs (sv_2mortal (newSViv (req->result)));
174
175 if (req->type == REQ_OPEN)
176 {
177 /* convert fd to fh */
178 SV *fh;
179
219 PUTBACK; 180 PUTBACK;
220 call_sv (req->callback, G_VOID); 181 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
221 SPAGAIN; 182 SPAGAIN;
183
184 fh = SvREFCNT_inc (POPs);
185
186 PUSHMARK (SP);
187 XPUSHs (sv_2mortal (fh));
222 188 }
189
223 if (req->callback) 190 if (SvOK (req->callback))
224 SvREFCNT_dec (req->callback); 191 {
192 PUTBACK;
193 call_sv (req->callback, G_VOID | G_EVAL);
194 SPAGAIN;
195
196 if (SvTRUE (ERRSV))
197 {
198 free_req (req);
199 croak (0);
200 }
201 }
202
203 LEAVE;
225 204
226 errno = errorno; 205 errno = errorno;
227 count++; 206 count++;
228 } 207 }
229 208
230 Safefree (req); 209 free_req (req);
231 } 210 }
232 211
233 if (qs)
234 send_reqs ();
235
236 return count; 212 return count;
237} 213}
214
215static void *aio_proc(void *arg);
216
217static void
218start_thread (void)
219{
220 sigset_t fullsigset, oldsigset;
221 pthread_t tid;
222 pthread_attr_t attr;
223
224 pthread_attr_init (&attr);
225 pthread_attr_setstacksize (&attr, STACKSIZE);
226 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
227
228 sigfillset (&fullsigset);
229 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
230
231 if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
232 started++;
233
234 sigprocmask (SIG_SETMASK, &oldsigset, 0);
235}
236
237static void
238send_req (aio_req req)
239{
240 while (started < wanted && nreqs >= started)
241 start_thread ();
242
243 nreqs++;
244
245 pthread_mutex_lock (&reqlock);
246
247 req->next = 0;
248
249 if (reqe)
250 {
251 reqe->next = req;
252 reqe = req;
253 }
254 else
255 reqe = reqs = req;
256
257 pthread_cond_signal (&reqwait);
258 pthread_mutex_unlock (&reqlock);
259
260 if (nreqs > max_outstanding)
261 for (;;)
262 {
263 poll_cb ();
264
265 if (nreqs <= max_outstanding)
266 break;
267
268 poll_wait ();
269 }
270}
271
272static void
273end_thread (void)
274{
275 aio_req req;
276 Newz (0, req, 1, aio_cb);
277 req->type = REQ_QUIT;
278
279 send_req (req);
280}
281
282static void min_parallel (int nthreads)
283{
284 if (wanted < nthreads)
285 wanted = nthreads;
286}
287
288static void max_parallel (int nthreads)
289{
290 int cur = started;
291
292 if (wanted > nthreads)
293 wanted = nthreads;
294
295 while (cur > wanted)
296 {
297 end_thread ();
298 cur--;
299 }
300
301 while (started > wanted)
302 {
303 poll_wait ();
304 poll_cb ();
305 }
306}
307
308static void create_pipe ()
309{
310 if (pipe (respipe))
311 croak ("unable to initialize result pipe");
312
313 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
314 croak ("cannot set result pipe to nonblocking mode");
315
316 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
317 croak ("cannot set result pipe to nonblocking mode");
318}
319
320static void atfork_prepare (void)
321{
322 pthread_mutex_lock (&reqlock);
323 pthread_mutex_lock (&reslock);
324}
325
326static void atfork_parent (void)
327{
328 pthread_mutex_unlock (&reslock);
329 pthread_mutex_unlock (&reqlock);
330}
331
332static void atfork_child (void)
333{
334 aio_req prv;
335
336 started = 0;
337
338 while (reqs)
339 {
340 prv = reqs;
341 reqs = prv->next;
342 free_req (prv);
343 }
344
345 reqs = reqe = 0;
346
347 while (ress)
348 {
349 prv = ress;
350 ress = prv->next;
351 free_req (prv);
352 }
353
354 ress = rese = 0;
355
356 close (respipe [0]);
357 close (respipe [1]);
358 create_pipe ();
359
360 atfork_parent ();
361}
362
363/*****************************************************************************/
364/* work around various missing functions */
365
366#if !HAVE_PREADWRITE
367# define pread aio_pread
368# define pwrite aio_pwrite
369
370/*
371 * make our pread/pwrite safe against themselves, but not against
372 * normal read/write by using a mutex. slows down execution a lot,
373 * but that's your problem, not mine.
374 */
375static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
376
377static ssize_t
378pread (int fd, void *buf, size_t count, off_t offset)
379{
380 ssize_t res;
381 off_t ooffset;
382
383 pthread_mutex_lock (&iolock);
384 ooffset = lseek (fd, 0, SEEK_CUR);
385 lseek (fd, offset, SEEK_SET);
386 res = read (fd, buf, count);
387 lseek (fd, ooffset, SEEK_SET);
388 pthread_mutex_unlock (&iolock);
389
390 return res;
391}
392
393static ssize_t
394pwrite (int fd, void *buf, size_t count, off_t offset)
395{
396 ssize_t res;
397 off_t ooffset;
398
399 pthread_mutex_lock (&iolock);
400 ooffset = lseek (fd, 0, SEEK_CUR);
401 lseek (fd, offset, SEEK_SET);
402 res = write (fd, buf, count);
403 lseek (fd, offset, SEEK_SET);
404 pthread_mutex_unlock (&iolock);
405
406 return res;
407}
408#endif
409
410#if !HAVE_FDATASYNC
411# define fdatasync fsync
412#endif
413
414#if !HAVE_READAHEAD
415# define readahead aio_readahead
416
417static char readahead_buf[4096];
418
419static ssize_t
420readahead (int fd, off_t offset, size_t count)
421{
422 while (count > 0)
423 {
424 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
425
426 pread (fd, readahead_buf, len, offset);
427 offset += len;
428 count -= len;
429 }
430
431 errno = 0;
432}
433#endif
434
435/* sendfile always needs emulation */
436static ssize_t
437sendfile_ (int ofd, int ifd, off_t offset, size_t count)
438{
439 ssize_t res;
440
441 if (!count)
442 return 0;
443
444#if __linux
445 res = sendfile (ofd, ifd, &offset, count);
446
447#elif __freebsd
448 /*
449 * Of course, the freebsd sendfile is a dire hack with no thoughts
450 * wasted on making it similar to other i/o functions.
451 */
452 {
453 off_t sbytes;
454 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
455
456 if (!res && errno == EAGAIN)
457 /* maybe on others, too, as usual, the manpage leaves you guessing */
458 res = sbytes;
459 }
460
461#elif __hpux
462 res = sendfile (ofd, ifd, offset, count, 0, 0);
463
464#else
465 res = -1;
466 errno = ENOSYS;
467#endif
468
469 if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))
470 {
471 /* emulate sendfile. this is a major pain in the ass */
472 char *buf = malloc (4096);
473 res = 0;
474
475 for (;;)
476 {
477 ssize_t cnt;
478
479 cnt = pread (ifd, buf, 4096, offset);
480
481 if (cnt <= 0)
482 {
483 if (cnt && !res) res = -1;
484 break;
485 }
486
487 cnt = write (ofd, buf, cnt);
488
489 if (cnt <= 0)
490 {
491 if (cnt && !res) res = -1;
492 break;
493 }
494
495 offset += cnt;
496 res += cnt;
497 }
498
499 {
500 int errorno = errno;
501 free (buf);
502 errno = errorno;
503 }
504 }
505
506 return res;
507}
508
509/*****************************************************************************/
238 510
239static void * 511static void *
240aio_proc (void *thr_arg) 512aio_proc (void *thr_arg)
241{ 513{
242 aio_req req; 514 aio_req req;
515 int type;
243 516
244 /* then loop */ 517 do
245 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
246 { 518 {
519 pthread_mutex_lock (&reqlock);
520
521 for (;;)
522 {
523 req = reqs;
524
525 if (reqs)
526 {
527 reqs = reqs->next;
528 if (!reqs) reqe = 0;
529 }
530
531 if (req)
532 break;
533
534 pthread_cond_wait (&reqwait, &reqlock);
535 }
536
537 pthread_mutex_unlock (&reqlock);
538
247 errno = 0; /* strictly unnecessary */ 539 errno = 0; /* strictly unnecessary */
248 540
541 type = req->type;
542
249 switch (req->type) 543 switch (type)
250 { 544 {
251 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; 545 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
252 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; 546 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
253#if SYS_readahead 547
254 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 548 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
255#else 549 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
256 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
257#endif
258 550
259 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 551 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
260 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 552 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
261 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 553 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
262 554
263 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 555 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
264 case REQ_CLOSE: req->result = close (req->fd); break; 556 case REQ_CLOSE: req->result = close (req->fd); break;
265 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 557 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
558 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
559 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
266 560
561 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
267 case REQ_FSYNC: req->result = fsync (req->fd); break; 562 case REQ_FSYNC: req->result = fsync (req->fd); break;
268 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
269 563
270 case REQ_QUIT: 564 case REQ_QUIT:
271 write (respipe[1], (void *)&req, sizeof (req)); 565 break;
272 return 0;
273 566
274 default: 567 default:
275 req->result = ENOSYS; 568 req->result = ENOSYS;
276 break; 569 break;
277 } 570 }
278 571
279 req->errorno = errno; 572 req->errorno = errno;
280 write (respipe[1], (void *)&req, sizeof (req)); 573
574 pthread_mutex_lock (&reslock);
575
576 req->next = 0;
577
578 if (rese)
579 {
580 rese->next = req;
581 rese = req;
582 }
583 else
584 {
585 rese = ress = req;
586
587 /* write a dummy byte to the pipe so fh becomes ready */
588 write (respipe [1], &respipe, 1);
589 }
590
591 pthread_mutex_unlock (&reslock);
281 } 592 }
593 while (type != REQ_QUIT);
282 594
283 return 0; 595 return 0;
284} 596}
285 597
598#define dREQ \
599 aio_req req; \
600 \
601 if (SvOK (callback) && !SvROK (callback)) \
602 croak ("clalback must be undef or of reference type"); \
603 \
604 Newz (0, req, 1, aio_cb); \
605 if (!req) \
606 croak ("out of memory during aio_req allocation"); \
607 \
608 req->callback = newSVsv (callback);
609
286MODULE = IO::AIO PACKAGE = IO::AIO 610MODULE = IO::AIO PACKAGE = IO::AIO
287 611
612PROTOTYPES: ENABLE
613
288BOOT: 614BOOT:
289{ 615{
290 if (pipe (reqpipe) || pipe (respipe)) 616 create_pipe ();
291 croak ("unable to initialize request or result pipe"); 617 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
292
293 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))
294 croak ("cannot set result pipe to nonblocking mode");
295
296 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
297 croak ("cannot set result pipe to nonblocking mode");
298} 618}
299 619
300void 620void
301min_parallel(nthreads) 621min_parallel(nthreads)
302 int nthreads 622 int nthreads
303 PROTOTYPE: $ 623 PROTOTYPE: $
304 CODE:
305 while (nthreads > started)
306 start_thread ();
307 624
308void 625void
309max_parallel(nthreads) 626max_parallel(nthreads)
310 int nthreads 627 int nthreads
311 PROTOTYPE: $ 628 PROTOTYPE: $
629
630int
631max_outstanding(nreqs)
632 int nreqs
633 PROTOTYPE: $
312 CODE: 634 CODE:
313{ 635 RETVAL = max_outstanding;
314 int cur = started; 636 max_outstanding = nreqs;
315 while (cur > nthreads)
316 {
317 end_thread ();
318 cur--;
319 }
320 637
321 while (started > nthreads)
322 {
323 poll_wait ();
324 poll_cb (aTHX);
325 }
326}
327
328void 638void
329aio_open(pathname,flags,mode,callback) 639aio_open(pathname,flags,mode,callback=&PL_sv_undef)
330 SV * pathname 640 SV * pathname
331 int flags 641 int flags
332 int mode 642 int mode
333 SV * callback 643 SV * callback
334 PROTOTYPE: $$$$ 644 PROTOTYPE: $$$;$
335 CODE: 645 CODE:
336{ 646{
337 aio_req req; 647 dREQ;
338
339 Newz (0, req, 1, aio_cb);
340
341 if (!req)
342 croak ("out of memory during aio_req allocation");
343 648
344 req->type = REQ_OPEN; 649 req->type = REQ_OPEN;
345 req->data = newSVsv (pathname); 650 req->data = newSVsv (pathname);
346 req->dataptr = SvPV_nolen (req->data); 651 req->dataptr = SvPVbyte_nolen (req->data);
347 req->fd = flags; 652 req->fd = flags;
348 req->mode = mode; 653 req->mode = mode;
349 req->callback = SvREFCNT_inc (callback);
350 654
351 send_req (req); 655 send_req (req);
352} 656}
353 657
354void 658void
355aio_close(fh,callback) 659aio_close(fh,callback=&PL_sv_undef)
356 InputStream fh 660 SV * fh
357 SV * callback 661 SV * callback
358 PROTOTYPE: $$ 662 PROTOTYPE: $;$
359 ALIAS: 663 ALIAS:
360 aio_close = REQ_CLOSE 664 aio_close = REQ_CLOSE
361 aio_fsync = REQ_FSYNC 665 aio_fsync = REQ_FSYNC
362 aio_fdatasync = REQ_FDATASYNC 666 aio_fdatasync = REQ_FDATASYNC
363 CODE: 667 CODE:
364{ 668{
669 dREQ;
670
671 req->type = ix;
672 req->fh = newSVsv (fh);
673 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
674
675 send_req (req);
676}
677
678void
679aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
680 SV * fh
681 UV offset
682 UV length
683 SV * data
684 UV dataoffset
685 SV * callback
686 ALIAS:
687 aio_read = REQ_READ
688 aio_write = REQ_WRITE
689 PROTOTYPE: $$$$$;$
690 CODE:
691{
365 aio_req req; 692 aio_req req;
693 STRLEN svlen;
694 char *svptr = SvPVbyte (data, svlen);
366 695
367 Newz (0, req, 1, aio_cb); 696 SvUPGRADE (data, SVt_PV);
697 SvPOK_on (data);
368 698
369 if (!req) 699 if (dataoffset < 0)
370 croak ("out of memory during aio_req allocation"); 700 dataoffset += svlen;
371 701
372 req->type = ix; 702 if (dataoffset < 0 || dataoffset > svlen)
373 req->fd = PerlIO_fileno (fh); 703 croak ("data offset outside of string");
374 req->callback = SvREFCNT_inc (callback);
375 704
376 send_req (req); 705 if (ix == REQ_WRITE)
377} 706 {
378 707 /* write: check length and adjust. */
379void 708 if (length < 0 || length + dataoffset > svlen)
380aio_read(fh,offset,length,data,dataoffset,callback) 709 length = svlen - dataoffset;
381 InputStream fh 710 }
382 UV offset 711 else
383 IV length 712 {
384 SV * data 713 /* read: grow scalar as necessary */
385 IV dataoffset 714 svptr = SvGROW (data, length + dataoffset);
386 SV * callback 715 }
387 PROTOTYPE: $$$$$$
388 CODE:
389 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
390
391void
392aio_write(fh,offset,length,data,dataoffset,callback)
393 OutputStream fh
394 UV offset
395 IV length
396 SV * data
397 IV dataoffset
398 SV * callback
399 PROTOTYPE: $$$$$$
400 CODE:
401 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
402
403void
404aio_readahead(fh,offset,length,callback)
405 InputStream fh
406 UV offset
407 IV length
408 SV * callback
409 PROTOTYPE: $$$$
410 CODE:
411{
412 aio_req req;
413 716
414 if (length < 0) 717 if (length < 0)
415 croak ("length must not be negative"); 718 croak ("length must not be negative");
416 719
417 Newz (0, req, 1, aio_cb); 720 {
721 dREQ;
418 722
419 if (!req) 723 req->type = ix;
420 croak ("out of memory during aio_req allocation"); 724 req->fh = newSVsv (fh);
725 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
726 : IoOFP (sv_2io (fh)));
727 req->offset = offset;
728 req->length = length;
729 req->data = SvREFCNT_inc (data);
730 req->dataptr = (char *)svptr + dataoffset;
731
732 if (!SvREADONLY (data))
733 {
734 SvREADONLY_on (data);
735 req->data2ptr = (void *)data;
736 }
737
738 send_req (req);
739 }
740}
741
742void
743aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
744 SV * out_fh
745 SV * in_fh
746 UV in_offset
747 UV length
748 SV * callback
749 PROTOTYPE: $$$$;$
750 CODE:
751{
752 dREQ;
753
754 req->type = REQ_SENDFILE;
755 req->fh = newSVsv (out_fh);
756 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
757 req->fh2 = newSVsv (in_fh);
758 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
759 req->offset = in_offset;
760 req->length = length;
761
762 send_req (req);
763}
764
765void
766aio_readahead(fh,offset,length,callback=&PL_sv_undef)
767 SV * fh
768 UV offset
769 IV length
770 SV * callback
771 PROTOTYPE: $$$;$
772 CODE:
773{
774 dREQ;
421 775
422 req->type = REQ_READAHEAD; 776 req->type = REQ_READAHEAD;
777 req->fh = newSVsv (fh);
423 req->fd = PerlIO_fileno (fh); 778 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
424 req->offset = offset; 779 req->offset = offset;
425 req->length = length; 780 req->length = length;
426 req->callback = SvREFCNT_inc (callback);
427 781
428 send_req (req); 782 send_req (req);
429} 783}
430 784
431void 785void
432aio_stat(fh_or_path,callback) 786aio_stat(fh_or_path,callback=&PL_sv_undef)
433 SV * fh_or_path 787 SV * fh_or_path
434 SV * callback 788 SV * callback
435 PROTOTYPE: $$
436 ALIAS: 789 ALIAS:
790 aio_stat = REQ_STAT
437 aio_lstat = 1 791 aio_lstat = REQ_LSTAT
438 CODE: 792 CODE:
439{ 793{
440 aio_req req; 794 dREQ;
441
442 Newz (0, req, 1, aio_cb);
443
444 if (!req)
445 croak ("out of memory during aio_req allocation");
446 795
447 New (0, req->statdata, 1, Stat_t); 796 New (0, req->statdata, 1, Stat_t);
448
449 if (!req->statdata) 797 if (!req->statdata)
798 {
799 free_req (req);
450 croak ("out of memory during aio_req->statdata allocation"); 800 croak ("out of memory during aio_req->statdata allocation");
801 }
451 802
452 if (SvPOK (fh_or_path)) 803 if (SvPOK (fh_or_path))
453 { 804 {
454 req->type = ix ? REQ_LSTAT : REQ_STAT; 805 req->type = ix;
455 req->data = newSVsv (fh_or_path); 806 req->data = newSVsv (fh_or_path);
456 req->dataptr = SvPV_nolen (req->data); 807 req->dataptr = SvPVbyte_nolen (req->data);
457 } 808 }
458 else 809 else
459 { 810 {
460 req->type = REQ_FSTAT; 811 req->type = REQ_FSTAT;
812 req->fh = newSVsv (fh_or_path);
461 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 813 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
462 } 814 }
463 815
464 req->callback = SvREFCNT_inc (callback);
465
466 send_req (req); 816 send_req (req);
467} 817}
468 818
469void 819void
470aio_unlink(pathname,callback) 820aio_unlink(pathname,callback=&PL_sv_undef)
471 SV * pathname 821 SV * pathname
472 SV * callback 822 SV * callback
473 PROTOTYPE: $$ 823 ALIAS:
824 aio_unlink = REQ_UNLINK
825 aio_rmdir = REQ_RMDIR
474 CODE: 826 CODE:
475{ 827{
476 aio_req req; 828 dREQ;
477 829
478 Newz (0, req, 1, aio_cb); 830 req->type = ix;
479
480 if (!req)
481 croak ("out of memory during aio_req allocation");
482
483 req->type = REQ_UNLINK;
484 req->data = newSVsv (pathname); 831 req->data = newSVsv (pathname);
485 req->dataptr = SvPV_nolen (req->data); 832 req->dataptr = SvPVbyte_nolen (req->data);
486 req->callback = SvREFCNT_inc (callback);
487 833
488 send_req (req); 834 send_req (req);
489} 835}
836
837void
838aio_symlink(oldpath,newpath,callback=&PL_sv_undef)
839 SV * oldpath
840 SV * newpath
841 SV * callback
842 CODE:
843{
844 dREQ;
845
846 req->type = REQ_SYMLINK;
847 req->fh = newSVsv (oldpath);
848 req->data2ptr = SvPVbyte_nolen (req->fh);
849 req->data = newSVsv (newpath);
850 req->dataptr = SvPVbyte_nolen (req->data);
851
852 send_req (req);
853}
854
855void
856flush()
857 PROTOTYPE:
858 CODE:
859 while (nreqs)
860 {
861 poll_wait ();
862 poll_cb ();
863 }
864
865void
866poll()
867 PROTOTYPE:
868 CODE:
869 if (nreqs)
870 {
871 poll_wait ();
872 poll_cb ();
873 }
490 874
491int 875int
492poll_fileno() 876poll_fileno()
493 PROTOTYPE: 877 PROTOTYPE:
494 CODE: 878 CODE:
495 RETVAL = respipe[0]; 879 RETVAL = respipe [0];
496 OUTPUT: 880 OUTPUT:
497 RETVAL 881 RETVAL
498 882
499int 883int
500poll_cb(...) 884poll_cb(...)
501 PROTOTYPE: 885 PROTOTYPE:
502 CODE: 886 CODE:
503 RETVAL = poll_cb (aTHX); 887 RETVAL = poll_cb ();
504 OUTPUT: 888 OUTPUT:
505 RETVAL 889 RETVAL
506 890
507void 891void
508poll_wait() 892poll_wait()
509 PROTOTYPE: 893 PROTOTYPE:
510 CODE: 894 CODE:
895 if (nreqs)
511 poll_wait (); 896 poll_wait ();
512 897
513int 898int
514nreqs() 899nreqs()
515 PROTOTYPE: 900 PROTOTYPE:
516 CODE: 901 CODE:

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