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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.27 by root, Wed Aug 17 04:47:02 2005 UTC vs.
Revision 1.32 by root, Mon Aug 22 23:20:37 2005 UTC

… …
4#include "EXTERN.h" 4#include "EXTERN.h"
5#include "perl.h" 5#include "perl.h"
6#include "XSUB.h" 6#include "XSUB.h"
7 7
8#include "autoconf/config.h" 8#include "autoconf/config.h"
9
10#include <pthread.h>
9 11
10#include <sys/types.h> 12#include <sys/types.h>
11#include <sys/stat.h> 13#include <sys/stat.h>
12 14
13#include <unistd.h> 15#include <unistd.h>
14#include <fcntl.h> 16#include <fcntl.h>
15#include <signal.h> 17#include <signal.h>
16#include <sched.h> 18#include <sched.h>
17 19
18#include <pthread.h> 20#if HAVE_SENDFILE
19 21# if __linux
20typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 22# include <sys/sendfile.h>
21typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 23# elif __freebsd
22typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 24# include <sys/socket.h>
25# include <sys/uio.h>
26# elif __hpux
27# include <sys/socket.h>
28# endif
29#endif
23 30
24#if __ia64 31#if __ia64
25# define STACKSIZE 65536 32# define STACKSIZE 65536
26#else 33#else
27# define STACKSIZE 4096 34# define STACKSIZE 4096
… …
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, 42 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 43 REQ_FSYNC, REQ_FDATASYNC,
36 REQ_UNLINK, REQ_RMDIR, 44 REQ_UNLINK, REQ_RMDIR,
37 REQ_SYMLINK, 45 REQ_SYMLINK,
38}; 46};
… …
40typedef struct aio_cb { 48typedef struct aio_cb {
41 struct aio_cb *volatile next; 49 struct aio_cb *volatile next;
42 50
43 int type; 51 int type;
44 52
45 int fd; 53 int fd, fd2;
46 off_t offset; 54 off_t offset;
47 size_t length; 55 size_t length;
48 ssize_t result; 56 ssize_t result;
49 mode_t mode; /* open */ 57 mode_t mode; /* open */
50 int errorno; 58 int errorno;
51 SV *data, *callback, *fh; 59 SV *data, *callback;
60 SV *fh, *fh2;
52 void *dataptr, *data2ptr; 61 void *dataptr, *data2ptr;
53 STRLEN dataoffset; 62 STRLEN dataoffset;
54 63
55 Stat_t *statdata; 64 Stat_t *statdata;
56} aio_cb; 65} aio_cb;
57 66
58typedef aio_cb *aio_req; 67typedef aio_cb *aio_req;
59 68
60static int started; 69static int started, wanted;
61static volatile int nreqs; 70static volatile int nreqs;
62static int max_outstanding = 1<<30; 71static int max_outstanding = 1<<30;
63static int respipe [2]; 72static int respipe [2];
64 73
65static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 74static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
… …
74 if (req->data) 83 if (req->data)
75 SvREFCNT_dec (req->data); 84 SvREFCNT_dec (req->data);
76 85
77 if (req->fh) 86 if (req->fh)
78 SvREFCNT_dec (req->fh); 87 SvREFCNT_dec (req->fh);
88
89 if (req->fh2)
90 SvREFCNT_dec (req->fh2);
79 91
80 if (req->statdata) 92 if (req->statdata)
81 Safefree (req->statdata); 93 Safefree (req->statdata);
82 94
83 if (req->callback) 95 if (req->callback)
… …
116 { 128 {
117 ress = req->next; 129 ress = req->next;
118 130
119 if (!ress) 131 if (!ress)
120 { 132 {
121 rese = 0;
122
123 /* read any signals sent by the worker threads */ 133 /* read any signals sent by the worker threads */
124 char buf [32]; 134 char buf [32];
125 while (read (respipe [0], buf, 32) == 32) 135 while (read (respipe [0], buf, 32) == 32)
126 ; 136 ;
137
138 rese = 0;
127 } 139 }
128 } 140 }
129 141
130 pthread_mutex_unlock (&reslock); 142 pthread_mutex_unlock (&reslock);
131 143
… …
142 errno = req->errorno; 154 errno = req->errorno;
143 155
144 if (req->type == REQ_READ) 156 if (req->type == REQ_READ)
145 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0)); 157 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
146 158
159 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
160 SvREADONLY_off (req->data);
161
147 if (req->statdata) 162 if (req->statdata)
148 { 163 {
149 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 164 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
150 PL_laststatval = req->result; 165 PL_laststatval = req->result;
151 PL_statcache = *(req->statdata); 166 PL_statcache = *(req->statdata);
… …
218} 233}
219 234
220static void 235static void
221send_req (aio_req req) 236send_req (aio_req req)
222{ 237{
238 while (started < wanted && nreqs >= started)
239 start_thread ();
240
223 nreqs++; 241 nreqs++;
224 242
225 pthread_mutex_lock (&reqlock); 243 pthread_mutex_lock (&reqlock);
226 244
227 req->next = 0; 245 req->next = 0;
… …
259 send_req (req); 277 send_req (req);
260} 278}
261 279
262static void min_parallel (int nthreads) 280static void min_parallel (int nthreads)
263{ 281{
264 while (nthreads > started) 282 if (wanted < nthreads)
265 start_thread (); 283 wanted = nthreads;
266} 284}
267 285
268static void max_parallel (int nthreads) 286static void max_parallel (int nthreads)
269{ 287{
270 int cur = started; 288 int cur = started;
271 289
290 if (wanted > nthreads)
291 wanted = nthreads;
292
272 while (cur > nthreads) 293 while (cur > wanted)
273 { 294 {
274 end_thread (); 295 end_thread ();
275 cur--; 296 cur--;
276 } 297 }
277 298
278 while (started > nthreads) 299 while (started > wanted)
279 { 300 {
280 poll_wait (); 301 poll_wait ();
281 poll_cb (); 302 poll_cb ();
282 } 303 }
283} 304}
… …
294 croak ("cannot set result pipe to nonblocking mode"); 315 croak ("cannot set result pipe to nonblocking mode");
295} 316}
296 317
297static void atfork_prepare (void) 318static void atfork_prepare (void)
298{ 319{
299 for (;;) {
300
301 for (;;)
302 {
303 poll_cb ();
304
305 if (!nreqs)
306 break;
307
308 poll_wait ();
309 }
310
311 pthread_mutex_lock (&reqlock); 320 pthread_mutex_lock (&reqlock);
312
313 if (!nreqs)
314 break;
315
316 pthread_mutex_unlock (&reqlock);
317 }
318
319 pthread_mutex_lock (&reslock); 321 pthread_mutex_lock (&reslock);
320
321 assert (!nreqs && !reqs && !ress);
322} 322}
323 323
324static void atfork_parent (void) 324static void atfork_parent (void)
325{ 325{
326 pthread_mutex_unlock (&reslock); 326 pthread_mutex_unlock (&reslock);
327 pthread_mutex_unlock (&reqlock); 327 pthread_mutex_unlock (&reqlock);
328} 328}
329 329
330static void atfork_child (void) 330static void atfork_child (void)
331{ 331{
332 int restart = started; 332 aio_req prv;
333
333 started = 0; 334 started = 0;
334 335
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
335 atfork_parent (); 358 atfork_parent ();
336
337 min_parallel (restart);
338} 359}
339 360
340/*****************************************************************************/ 361/*****************************************************************************/
341/* work around various missing functions */ 362/* work around various missing functions */
342 363
… …
407 428
408 errno = 0; 429 errno = 0;
409} 430}
410#endif 431#endif
411 432
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 res = sbytes;
456 }
457
458#elif __hpux
459 res = sendfile (ofd, ifd, offset, count, 0, 0);
460
461#else
462 res = -1;
463 errno = ENOSYS;
464#endif
465
466 if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))
467 {
468 /* emulate sendfile. this is a major pain in the ass */
469 char *buf = malloc (4096);
470 res = 0;
471
472 for (;;)
473 {
474 ssize_t cnt;
475
476 cnt = pread (ifd, buf, 4096, offset);
477
478 if (cnt <= 0)
479 {
480 if (cnt && !res) res = -1;
481 break;
482 }
483
484 cnt = write (ofd, buf, cnt);
485
486 if (cnt <= 0)
487 {
488 if (cnt && !res) res = -1;
489 break;
490 }
491
492 offset += cnt;
493 res += cnt;
494 }
495
496 {
497 int errorno = errno;
498 free (buf);
499 errno = errorno;
500 }
501 }
502
503 return res;
504}
505
412/*****************************************************************************/ 506/*****************************************************************************/
413 507
414static void * 508static void *
415aio_proc (void *thr_arg) 509aio_proc (void *thr_arg)
416{ 510{
… …
447 { 541 {
448 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; 542 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
449 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; 543 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
450 544
451 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 545 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
546 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
452 547
453 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 548 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
454 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 549 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
455 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 550 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
456 551
… …
579 674
580void 675void
581aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 676aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
582 SV * fh 677 SV * fh
583 UV offset 678 UV offset
584 IV length 679 UV length
585 SV * data 680 SV * data
586 IV dataoffset 681 UV dataoffset
587 SV * callback 682 SV * callback
588 ALIAS: 683 ALIAS:
589 aio_read = REQ_READ 684 aio_read = REQ_READ
590 aio_write = REQ_WRITE 685 aio_write = REQ_WRITE
591 PROTOTYPE: $$$$$;$ 686 PROTOTYPE: $$$$$;$
… …
629 req->offset = offset; 724 req->offset = offset;
630 req->length = length; 725 req->length = length;
631 req->data = SvREFCNT_inc (data); 726 req->data = SvREFCNT_inc (data);
632 req->dataptr = (char *)svptr + dataoffset; 727 req->dataptr = (char *)svptr + dataoffset;
633 728
729 if (!SvREADONLY (data))
730 {
731 SvREADONLY_on (data);
732 req->data2ptr = (void *)data;
733 }
734
634 send_req (req); 735 send_req (req);
635 } 736 }
737}
738
739void
740aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
741 SV * out_fh
742 SV * in_fh
743 UV in_offset
744 UV length
745 SV * callback
746 PROTOTYPE: $$$$;$
747 CODE:
748{
749 dREQ;
750
751 req->type = REQ_SENDFILE;
752 req->fh = newSVsv (out_fh);
753 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
754 req->fh2 = newSVsv (in_fh);
755 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
756 req->offset = in_offset;
757 req->length = length;
758
759 send_req (req);
636} 760}
637 761
638void 762void
639aio_readahead(fh,offset,length,callback=&PL_sv_undef) 763aio_readahead(fh,offset,length,callback=&PL_sv_undef)
640 SV * fh 764 SV * fh

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