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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 1.32 by root, Mon Aug 22 23:20:37 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)));
172
173 if (req->type == REQ_OPEN)
174 {
175 /* convert fd to fh */
176 SV *fh;
177
219 PUTBACK; 178 PUTBACK;
220 call_sv (req->callback, G_VOID); 179 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
221 SPAGAIN; 180 SPAGAIN;
181
182 fh = SvREFCNT_inc (POPs);
183
184 PUSHMARK (SP);
185 XPUSHs (sv_2mortal (fh));
222 186 }
187
223 if (req->callback) 188 if (SvOK (req->callback))
224 SvREFCNT_dec (req->callback); 189 {
190 PUTBACK;
191 call_sv (req->callback, G_VOID | G_EVAL);
192 SPAGAIN;
193
194 if (SvTRUE (ERRSV))
195 {
196 free_req (req);
197 croak (0);
198 }
199 }
200
201 LEAVE;
225 202
226 errno = errorno; 203 errno = errorno;
227 count++; 204 count++;
228 } 205 }
229 206
230 Safefree (req); 207 free_req (req);
231 } 208 }
232 209
233 if (qs)
234 send_reqs ();
235
236 return count; 210 return count;
237} 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 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
506/*****************************************************************************/
238 507
239static void * 508static void *
240aio_proc (void *thr_arg) 509aio_proc (void *thr_arg)
241{ 510{
242 aio_req req; 511 aio_req req;
512 int type;
243 513
244 /* then loop */ 514 do
245 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
246 { 515 {
516 pthread_mutex_lock (&reqlock);
517
518 for (;;)
519 {
520 req = reqs;
521
522 if (reqs)
523 {
524 reqs = reqs->next;
525 if (!reqs) reqe = 0;
526 }
527
528 if (req)
529 break;
530
531 pthread_cond_wait (&reqwait, &reqlock);
532 }
533
534 pthread_mutex_unlock (&reqlock);
535
247 errno = 0; /* strictly unnecessary */ 536 errno = 0; /* strictly unnecessary */
248 537
538 type = req->type;
539
249 switch (req->type) 540 switch (type)
250 { 541 {
251 case REQ_READ: req->result = pread64 (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;
252 case REQ_WRITE: req->result = pwrite64 (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;
253#if SYS_readahead 544
254 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;
255#else 546 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
258 547
259 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 548 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
260 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 549 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
261 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 550 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
262 551
263 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 552 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
264 case REQ_CLOSE: req->result = close (req->fd); break; 553 case REQ_CLOSE: req->result = close (req->fd); break;
265 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 554 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
555 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
556 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
266 557
558 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
267 case REQ_FSYNC: req->result = fsync (req->fd); break; 559 case REQ_FSYNC: req->result = fsync (req->fd); break;
268 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
269 560
270 case REQ_QUIT: 561 case REQ_QUIT:
271 write (respipe[1], (void *)&req, sizeof (req)); 562 break;
272 return 0;
273 563
274 default: 564 default:
275 req->result = ENOSYS; 565 req->result = ENOSYS;
276 break; 566 break;
277 } 567 }
278 568
279 req->errorno = errno; 569 req->errorno = errno;
280 write (respipe[1], (void *)&req, sizeof (req)); 570
571 pthread_mutex_lock (&reslock);
572
573 req->next = 0;
574
575 if (rese)
576 {
577 rese->next = req;
578 rese = req;
579 }
580 else
581 {
582 rese = ress = req;
583
584 /* write a dummy byte to the pipe so fh becomes ready */
585 write (respipe [1], &respipe, 1);
586 }
587
588 pthread_mutex_unlock (&reslock);
281 } 589 }
590 while (type != REQ_QUIT);
282 591
283 return 0; 592 return 0;
284} 593}
285 594
595#define dREQ \
596 aio_req req; \
597 \
598 if (SvOK (callback) && !SvROK (callback)) \
599 croak ("clalback must be undef or of reference type"); \
600 \
601 Newz (0, req, 1, aio_cb); \
602 if (!req) \
603 croak ("out of memory during aio_req allocation"); \
604 \
605 req->callback = newSVsv (callback);
606
286MODULE = IO::AIO PACKAGE = IO::AIO 607MODULE = IO::AIO PACKAGE = IO::AIO
287 608
609PROTOTYPES: ENABLE
610
288BOOT: 611BOOT:
289{ 612{
290 if (pipe (reqpipe) || pipe (respipe)) 613 create_pipe ();
291 croak ("unable to initialize request or result pipe"); 614 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} 615}
299 616
300void 617void
301min_parallel(nthreads) 618min_parallel(nthreads)
302 int nthreads 619 int nthreads
303 PROTOTYPE: $ 620 PROTOTYPE: $
304 CODE:
305 while (nthreads > started)
306 start_thread ();
307 621
308void 622void
309max_parallel(nthreads) 623max_parallel(nthreads)
310 int nthreads 624 int nthreads
311 PROTOTYPE: $ 625 PROTOTYPE: $
626
627int
628max_outstanding(nreqs)
629 int nreqs
630 PROTOTYPE: $
312 CODE: 631 CODE:
313{ 632 RETVAL = max_outstanding;
314 int cur = started; 633 max_outstanding = nreqs;
315 while (cur > nthreads)
316 {
317 end_thread ();
318 cur--;
319 }
320 634
321 while (started > nthreads)
322 {
323 poll_wait ();
324 poll_cb (aTHX);
325 }
326}
327
328void 635void
329aio_open(pathname,flags,mode,callback) 636aio_open(pathname,flags,mode,callback=&PL_sv_undef)
330 SV * pathname 637 SV * pathname
331 int flags 638 int flags
332 int mode 639 int mode
333 SV * callback 640 SV * callback
334 PROTOTYPE: $$$$ 641 PROTOTYPE: $$$;$
335 CODE: 642 CODE:
336{ 643{
337 aio_req req; 644 dREQ;
338
339 Newz (0, req, 1, aio_cb);
340
341 if (!req)
342 croak ("out of memory during aio_req allocation");
343 645
344 req->type = REQ_OPEN; 646 req->type = REQ_OPEN;
345 req->data = newSVsv (pathname); 647 req->data = newSVsv (pathname);
346 req->dataptr = SvPV_nolen (req->data); 648 req->dataptr = SvPVbyte_nolen (req->data);
347 req->fd = flags; 649 req->fd = flags;
348 req->mode = mode; 650 req->mode = mode;
349 req->callback = SvREFCNT_inc (callback);
350 651
351 send_req (req); 652 send_req (req);
352} 653}
353 654
354void 655void
355aio_close(fh,callback) 656aio_close(fh,callback=&PL_sv_undef)
356 InputStream fh 657 SV * fh
357 SV * callback 658 SV * callback
358 PROTOTYPE: $$ 659 PROTOTYPE: $;$
359 ALIAS: 660 ALIAS:
360 aio_close = REQ_CLOSE 661 aio_close = REQ_CLOSE
361 aio_fsync = REQ_FSYNC 662 aio_fsync = REQ_FSYNC
362 aio_fdatasync = REQ_FDATASYNC 663 aio_fdatasync = REQ_FDATASYNC
363 CODE: 664 CODE:
364{ 665{
666 dREQ;
667
668 req->type = ix;
669 req->fh = newSVsv (fh);
670 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
671
672 send_req (req);
673}
674
675void
676aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
677 SV * fh
678 UV offset
679 UV length
680 SV * data
681 UV dataoffset
682 SV * callback
683 ALIAS:
684 aio_read = REQ_READ
685 aio_write = REQ_WRITE
686 PROTOTYPE: $$$$$;$
687 CODE:
688{
365 aio_req req; 689 aio_req req;
690 STRLEN svlen;
691 char *svptr = SvPVbyte (data, svlen);
366 692
367 Newz (0, req, 1, aio_cb); 693 SvUPGRADE (data, SVt_PV);
694 SvPOK_on (data);
368 695
369 if (!req) 696 if (dataoffset < 0)
370 croak ("out of memory during aio_req allocation"); 697 dataoffset += svlen;
371 698
372 req->type = ix; 699 if (dataoffset < 0 || dataoffset > svlen)
373 req->fd = PerlIO_fileno (fh); 700 croak ("data offset outside of string");
374 req->callback = SvREFCNT_inc (callback);
375 701
376 send_req (req); 702 if (ix == REQ_WRITE)
377} 703 {
378 704 /* write: check length and adjust. */
379void 705 if (length < 0 || length + dataoffset > svlen)
380aio_read(fh,offset,length,data,dataoffset,callback) 706 length = svlen - dataoffset;
381 InputStream fh 707 }
382 UV offset 708 else
383 IV length 709 {
384 SV * data 710 /* read: grow scalar as necessary */
385 IV dataoffset 711 svptr = SvGROW (data, length + dataoffset);
386 SV * callback 712 }
387 PROTOTYPE: $$$$$$
388 CODE:
389 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
390
391void
392aio_write(fh,offset,length,data,dataoffset,callback)
393 OutputStream fh
394 UV offset
395 IV length
396 SV * data
397 IV dataoffset
398 SV * callback
399 PROTOTYPE: $$$$$$
400 CODE:
401 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
402
403void
404aio_readahead(fh,offset,length,callback)
405 InputStream fh
406 UV offset
407 IV length
408 SV * callback
409 PROTOTYPE: $$$$
410 CODE:
411{
412 aio_req req;
413 713
414 if (length < 0) 714 if (length < 0)
415 croak ("length must not be negative"); 715 croak ("length must not be negative");
416 716
417 Newz (0, req, 1, aio_cb); 717 {
718 dREQ;
418 719
419 if (!req) 720 req->type = ix;
420 croak ("out of memory during aio_req allocation"); 721 req->fh = newSVsv (fh);
722 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
723 : IoOFP (sv_2io (fh)));
724 req->offset = offset;
725 req->length = length;
726 req->data = SvREFCNT_inc (data);
727 req->dataptr = (char *)svptr + dataoffset;
728
729 if (!SvREADONLY (data))
730 {
731 SvREADONLY_on (data);
732 req->data2ptr = (void *)data;
733 }
734
735 send_req (req);
736 }
737}
738
739void
740aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
741 SV * out_fh
742 SV * in_fh
743 UV in_offset
744 UV length
745 SV * callback
746 PROTOTYPE: $$$$;$
747 CODE:
748{
749 dREQ;
750
751 req->type = REQ_SENDFILE;
752 req->fh = newSVsv (out_fh);
753 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
754 req->fh2 = newSVsv (in_fh);
755 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
756 req->offset = in_offset;
757 req->length = length;
758
759 send_req (req);
760}
761
762void
763aio_readahead(fh,offset,length,callback=&PL_sv_undef)
764 SV * fh
765 UV offset
766 IV length
767 SV * callback
768 PROTOTYPE: $$$;$
769 CODE:
770{
771 dREQ;
421 772
422 req->type = REQ_READAHEAD; 773 req->type = REQ_READAHEAD;
774 req->fh = newSVsv (fh);
423 req->fd = PerlIO_fileno (fh); 775 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
424 req->offset = offset; 776 req->offset = offset;
425 req->length = length; 777 req->length = length;
426 req->callback = SvREFCNT_inc (callback);
427 778
428 send_req (req); 779 send_req (req);
429} 780}
430 781
431void 782void
432aio_stat(fh_or_path,callback) 783aio_stat(fh_or_path,callback=&PL_sv_undef)
433 SV * fh_or_path 784 SV * fh_or_path
434 SV * callback 785 SV * callback
435 PROTOTYPE: $$
436 ALIAS: 786 ALIAS:
787 aio_stat = REQ_STAT
437 aio_lstat = 1 788 aio_lstat = REQ_LSTAT
438 CODE: 789 CODE:
439{ 790{
440 aio_req req; 791 dREQ;
441
442 Newz (0, req, 1, aio_cb);
443
444 if (!req)
445 croak ("out of memory during aio_req allocation");
446 792
447 New (0, req->statdata, 1, Stat_t); 793 New (0, req->statdata, 1, Stat_t);
448
449 if (!req->statdata) 794 if (!req->statdata)
795 {
796 free_req (req);
450 croak ("out of memory during aio_req->statdata allocation"); 797 croak ("out of memory during aio_req->statdata allocation");
798 }
451 799
452 if (SvPOK (fh_or_path)) 800 if (SvPOK (fh_or_path))
453 { 801 {
454 req->type = ix ? REQ_LSTAT : REQ_STAT; 802 req->type = ix;
455 req->data = newSVsv (fh_or_path); 803 req->data = newSVsv (fh_or_path);
456 req->dataptr = SvPV_nolen (req->data); 804 req->dataptr = SvPVbyte_nolen (req->data);
457 } 805 }
458 else 806 else
459 { 807 {
460 req->type = REQ_FSTAT; 808 req->type = REQ_FSTAT;
809 req->fh = newSVsv (fh_or_path);
461 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 810 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
462 } 811 }
463 812
464 req->callback = SvREFCNT_inc (callback);
465
466 send_req (req); 813 send_req (req);
467} 814}
468 815
469void 816void
470aio_unlink(pathname,callback) 817aio_unlink(pathname,callback=&PL_sv_undef)
471 SV * pathname 818 SV * pathname
472 SV * callback 819 SV * callback
473 PROTOTYPE: $$ 820 ALIAS:
821 aio_unlink = REQ_UNLINK
822 aio_rmdir = REQ_RMDIR
474 CODE: 823 CODE:
475{ 824{
476 aio_req req; 825 dREQ;
477 826
478 Newz (0, req, 1, aio_cb); 827 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); 828 req->data = newSVsv (pathname);
485 req->dataptr = SvPV_nolen (req->data); 829 req->dataptr = SvPVbyte_nolen (req->data);
486 req->callback = SvREFCNT_inc (callback);
487 830
488 send_req (req); 831 send_req (req);
489} 832}
833
834void
835aio_symlink(oldpath,newpath,callback=&PL_sv_undef)
836 SV * oldpath
837 SV * newpath
838 SV * callback
839 CODE:
840{
841 dREQ;
842
843 req->type = REQ_SYMLINK;
844 req->fh = newSVsv (oldpath);
845 req->data2ptr = SvPVbyte_nolen (req->fh);
846 req->data = newSVsv (newpath);
847 req->dataptr = SvPVbyte_nolen (req->data);
848
849 send_req (req);
850}
851
852void
853flush()
854 PROTOTYPE:
855 CODE:
856 while (nreqs)
857 {
858 poll_wait ();
859 poll_cb ();
860 }
861
862void
863poll()
864 PROTOTYPE:
865 CODE:
866 if (nreqs)
867 {
868 poll_wait ();
869 poll_cb ();
870 }
490 871
491int 872int
492poll_fileno() 873poll_fileno()
493 PROTOTYPE: 874 PROTOTYPE:
494 CODE: 875 CODE:
495 RETVAL = respipe[0]; 876 RETVAL = respipe [0];
496 OUTPUT: 877 OUTPUT:
497 RETVAL 878 RETVAL
498 879
499int 880int
500poll_cb(...) 881poll_cb(...)
501 PROTOTYPE: 882 PROTOTYPE:
502 CODE: 883 CODE:
503 RETVAL = poll_cb (aTHX); 884 RETVAL = poll_cb ();
504 OUTPUT: 885 OUTPUT:
505 RETVAL 886 RETVAL
506 887
507void 888void
508poll_wait() 889poll_wait()
509 PROTOTYPE: 890 PROTOTYPE:
510 CODE: 891 CODE:
892 if (nreqs)
511 poll_wait (); 893 poll_wait ();
512 894
513int 895int
514nreqs() 896nreqs()
515 PROTOTYPE: 897 PROTOTYPE:
516 CODE: 898 CODE:

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