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

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