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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.3 by root, Sun Jul 10 20:07:11 2005 UTC vs.
Revision 1.72 by root, Tue Oct 24 17:22:17 2006 UTC

1#define PERL_NO_GET_CONTEXT 1/* solaris */
2#define _POSIX_PTHREAD_SEMANTICS 1
3
4#if __linux
5# define _GNU_SOURCE
6#endif
7
8#define _REENTRANT 1
9
10#include <errno.h>
2 11
3#include "EXTERN.h" 12#include "EXTERN.h"
4#include "perl.h" 13#include "perl.h"
5#include "XSUB.h" 14#include "XSUB.h"
6 15
16#include "autoconf/config.h"
17
18#include <pthread.h>
19
20#include <stddef.h>
21#include <errno.h>
22#include <sys/time.h>
23#include <sys/select.h>
7#include <sys/types.h> 24#include <sys/types.h>
8#include <sys/stat.h> 25#include <sys/stat.h>
26#include <limits.h>
9#include <unistd.h> 27#include <unistd.h>
10#include <fcntl.h> 28#include <fcntl.h>
11#include <signal.h> 29#include <signal.h>
12#include <sched.h> 30#include <sched.h>
13#include <endian.h>
14 31
15#include <pthread.h> 32#if HAVE_SENDFILE
33# if __linux
34# include <sys/sendfile.h>
35# elif __freebsd
16#include <sys/syscall.h> 36# include <sys/socket.h>
37# include <sys/uio.h>
38# elif __hpux
39# include <sys/socket.h>
40# elif __solaris /* not yet */
41# include <sys/sendfile.h>
42# else
43# error sendfile support requested but not available
44# endif
45#endif
17 46
18typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 47/* used for struct dirent, AIX doesn't provide it */
19typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 48#ifndef NAME_MAX
20typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 49# define NAME_MAX 4096
50#endif
21 51
22#if __i386 || __amd64
23# define STACKSIZE ( 256 * sizeof (long))
24#elif __ia64 52#if __ia64
25# define STACKSIZE (8192 * sizeof (long)) 53# define STACKSIZE 65536
54#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
55# define STACKSIZE PTHREAD_STACK_MIN
26#else 56#else
27# define STACKSIZE ( 512 * sizeof (long)) 57# define STACKSIZE 16384
28#endif 58#endif
59
60/* buffer size for various temporary buffers */
61#define AIO_BUFSIZE 65536
62
63#define dBUF \
64 char *aio_buf; \
65 LOCK (wrklock); \
66 self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
67 UNLOCK (wrklock); \
68 if (!aio_buf) \
69 return -1;
29 70
30enum { 71enum {
31 REQ_QUIT, 72 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 73 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 74 REQ_READ, REQ_WRITE, REQ_READAHEAD,
75 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 76 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 77 REQ_FSYNC, REQ_FDATASYNC,
78 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
79 REQ_READDIR,
80 REQ_LINK, REQ_SYMLINK,
81 REQ_GROUP, REQ_NOP,
82 REQ_BUSY,
36}; 83};
37 84
85#define AIO_REQ_KLASS "IO::AIO::REQ"
86#define AIO_GRP_KLASS "IO::AIO::GRP"
87
38typedef struct aio_cb { 88typedef struct aio_cb
89{
39 struct aio_cb *volatile next; 90 struct aio_cb *volatile next;
40 91
41 int type; 92 SV *data, *callback;
42 93 SV *fh, *fh2;
43 int fd; 94 void *dataptr, *data2ptr;
95 Stat_t *statdata;
44 off_t offset; 96 off_t offset;
45 size_t length; 97 size_t length;
46 ssize_t result; 98 ssize_t result;
99
100 STRLEN dataoffset;
101 int type;
102 int fd, fd2;
103 int errorno;
47 mode_t mode; /* open */ 104 mode_t mode; /* open */
48 int errorno;
49 SV *data, *callback;
50 void *dataptr;
51 STRLEN dataoffset;
52 105
53 Stat_t *statdata; 106 unsigned char flags;
107 unsigned char pri;
108
109 SV *self; /* the perl counterpart of this request, if any */
110 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
54} aio_cb; 111} aio_cb;
55 112
113enum {
114 FLAG_CANCELLED = 0x01,
115};
116
56typedef aio_cb *aio_req; 117typedef aio_cb *aio_req;
118typedef aio_cb *aio_req_ornot;
57 119
120enum {
121 PRI_MIN = -4,
122 PRI_MAX = 4,
123
124 DEFAULT_PRI = 0,
125 PRI_BIAS = -PRI_MIN,
126 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
127};
128
129static int next_pri = DEFAULT_PRI + PRI_BIAS;
130
58static int started; 131static int started, wanted;
59static int nreqs; 132static volatile int nreqs;
133static int max_outstanding = 1<<30;
60static int respipe [2]; 134static int respipe [2];
61 135
136#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
137# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
138#else
139# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
140#endif
141
142#define LOCK(mutex) pthread_mutex_lock (&(mutex))
143#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
144
145/* worker threasd management */
146static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
147
148typedef struct worker {
149 /* locked by wrklock */
150 struct worker *prev, *next;
151
152 pthread_t tid;
153
154 /* locked by reslock, reqlock or wrklock */
155 aio_req req; /* currently processed request */
156 void *dbuf;
157 DIR *dirp;
158} worker;
159
160static worker wrk_first = { &wrk_first, &wrk_first, 0 };
161
162static void worker_clear (worker *wrk)
163{
164 if (wrk->dirp)
165 {
166 closedir (wrk->dirp);
167 wrk->dirp = 0;
168 }
169
170 if (wrk->dbuf)
171 {
172 free (wrk->dbuf);
173 wrk->dbuf = 0;
174 }
175}
176
177static void worker_free (worker *wrk)
178{
179 wrk->next->prev = wrk->prev;
180 wrk->prev->next = wrk->next;
181
182 free (wrk);
183}
184
62static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 185static pthread_mutex_t reslock = AIO_MUTEX_INIT;
63static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 186static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
64static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 187static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
65 188
66static volatile aio_req reqs, reqe; /* queue start, queue end */ 189/*
67static volatile aio_req ress, rese; /* queue start, queue end */ 190 * a somewhat faster data structure might be nice, but
191 * with 8 priorities this actually needs <20 insns
192 * per shift, the most expensive operation.
193 */
194typedef struct {
195 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
196 int size;
197} reqq;
68 198
69static void *aio_proc(void *arg); 199static reqq req_queue;
200static reqq res_queue;
70 201
71static void 202int reqq_push (reqq *q, aio_req req)
72start_thread (void)
73{ 203{
74 sigset_t fullsigset, oldsigset; 204 int pri = req->pri;
75 pthread_t tid;
76 pthread_attr_t attr;
77
78 pthread_attr_init (&attr);
79 pthread_attr_setstacksize (&attr, STACKSIZE);
80 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
81
82 sigfillset (&fullsigset);
83 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
84
85 if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
86 started++;
87
88 sigprocmask (SIG_SETMASK, &oldsigset, 0);
89}
90
91static void
92send_req (aio_req req)
93{
94 nreqs++;
95
96 pthread_mutex_lock (&reqlock);
97
98 req->next = 0; 205 req->next = 0;
99 206
100 if (reqe) 207 if (q->qe[pri])
101 { 208 {
102 reqe->next = req; 209 q->qe[pri]->next = req;
103 reqe = req; 210 q->qe[pri] = req;
104 } 211 }
105 else 212 else
106 reqe = reqs = req; 213 q->qe[pri] = q->qs[pri] = req;
107 214
108 pthread_cond_signal (&reqwait); 215 return q->size++;
109 pthread_mutex_unlock (&reqlock);
110} 216}
111 217
112static void 218aio_req reqq_shift (reqq *q)
113end_thread (void)
114{ 219{
115 aio_req req; 220 int pri;
116 New (0, req, 1, aio_cb);
117 req->type = REQ_QUIT;
118 221
119 send_req (req); 222 if (!q->size)
120} 223 return 0;
121 224
122static void 225 --q->size;
123read_write (pTHX_
124 int dowrite, int fd, off_t offset, size_t length,
125 SV *data, STRLEN dataoffset, SV *callback)
126{
127 aio_req req;
128 STRLEN svlen;
129 char *svptr = SvPV (data, svlen);
130 226
131 SvUPGRADE (data, SVt_PV); 227 for (pri = NUM_PRI; pri--; )
132 SvPOK_on (data);
133
134 if (dataoffset < 0)
135 dataoffset += svlen;
136
137 if (dataoffset < 0 || dataoffset > svlen)
138 croak ("data offset outside of string");
139
140 if (dowrite)
141 {
142 /* write: check length and adjust. */
143 if (length < 0 || length + dataoffset > svlen)
144 length = svlen - dataoffset;
145 } 228 {
146 else 229 aio_req req = q->qs[pri];
147 {
148 /* read: grow scalar as necessary */
149 svptr = SvGROW (data, length + dataoffset);
150 }
151 230
152 if (length < 0)
153 croak ("length must not be negative");
154
155 Newz (0, req, 1, aio_cb);
156
157 if (!req) 231 if (req)
158 croak ("out of memory during aio_req allocation"); 232 {
233 if (!(q->qs[pri] = req->next))
234 q->qe[pri] = 0;
159 235
160 req->type = dowrite ? REQ_WRITE : REQ_READ; 236 return req;
161 req->fd = fd; 237 }
162 req->offset = offset; 238 }
163 req->length = length;
164 req->data = SvREFCNT_inc (data);
165 req->dataptr = (char *)svptr + dataoffset;
166 req->callback = SvREFCNT_inc (callback);
167 239
168 send_req (req); 240 abort ();
169} 241}
170 242
171static void 243static void req_invoke (aio_req req);
172poll_wait () 244static void req_free (aio_req req);
245static void req_cancel (aio_req req);
246
247/* must be called at most once */
248static SV *req_sv (aio_req req, const char *klass)
173{ 249{
174 if (!nreqs) 250 if (!req->self)
251 {
252 req->self = (SV *)newHV ();
253 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
254 }
255
256 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
257}
258
259static aio_req SvAIO_REQ (SV *sv)
260{
261 MAGIC *mg;
262
263 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
264 croak ("object of class " AIO_REQ_KLASS " expected");
265
266 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
267
268 return mg ? (aio_req)mg->mg_ptr : 0;
269}
270
271static void aio_grp_feed (aio_req grp)
272{
273 while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
274 {
275 int old_len = grp->length;
276
277 if (grp->fh2 && SvOK (grp->fh2))
278 {
279 dSP;
280
281 ENTER;
282 SAVETMPS;
283 PUSHMARK (SP);
284 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
285 PUTBACK;
286 call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
287 SPAGAIN;
288 FREETMPS;
289 LEAVE;
290 }
291
292 /* stop if no progress has been made */
293 if (old_len == grp->length)
294 {
295 SvREFCNT_dec (grp->fh2);
296 grp->fh2 = 0;
297 break;
298 }
299 }
300}
301
302static void aio_grp_dec (aio_req grp)
303{
304 --grp->length;
305
306 /* call feeder, if applicable */
307 aio_grp_feed (grp);
308
309 /* finish, if done */
310 if (!grp->length && grp->fd)
311 {
312 req_invoke (grp);
313 req_free (grp);
314 }
315}
316
317static void poll_wait ()
318{
319 fd_set rfd;
320
321 while (nreqs)
322 {
323 int size;
324#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
325 LOCK (reslock);
326#endif
327 size = res_queue.size;
328#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
329 UNLOCK (reslock);
330#endif
331
332 if (size)
333 return;
334
335 FD_ZERO(&rfd);
336 FD_SET(respipe [0], &rfd);
337
338 select (respipe [0] + 1, &rfd, 0, 0, 0);
339 }
340}
341
342static void req_invoke (aio_req req)
343{
344 dSP;
345
346 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
347 {
348 errno = req->errorno;
349
350 ENTER;
351 SAVETMPS;
352 PUSHMARK (SP);
353 EXTEND (SP, 1);
354
355 switch (req->type)
356 {
357 case REQ_READDIR:
358 {
359 SV *rv = &PL_sv_undef;
360
361 if (req->result >= 0)
362 {
363 int i;
364 char *buf = req->data2ptr;
365 AV *av = newAV ();
366
367 av_extend (av, req->result - 1);
368
369 for (i = 0; i < req->result; ++i)
370 {
371 SV *sv = newSVpv (buf, 0);
372
373 av_store (av, i, sv);
374 buf += SvCUR (sv) + 1;
375 }
376
377 rv = sv_2mortal (newRV_noinc ((SV *)av));
378 }
379
380 PUSHs (rv);
381 }
382 break;
383
384 case REQ_OPEN:
385 {
386 /* convert fd to fh */
387 SV *fh;
388
389 PUSHs (sv_2mortal (newSViv (req->result)));
390 PUTBACK;
391 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
392 SPAGAIN;
393
394 fh = SvREFCNT_inc (POPs);
395
396 PUSHMARK (SP);
397 XPUSHs (sv_2mortal (fh));
398 }
399 break;
400
401 case REQ_GROUP:
402 req->fd = 2; /* mark group as finished */
403
404 if (req->data)
405 {
406 int i;
407 AV *av = (AV *)req->data;
408
409 EXTEND (SP, AvFILL (av) + 1);
410 for (i = 0; i <= AvFILL (av); ++i)
411 PUSHs (*av_fetch (av, i, 0));
412 }
413 break;
414
415 case REQ_NOP:
416 case REQ_BUSY:
417 break;
418
419 default:
420 PUSHs (sv_2mortal (newSViv (req->result)));
421 break;
422 }
423
424
425 PUTBACK;
426 call_sv (req->callback, G_VOID | G_EVAL);
427 SPAGAIN;
428
429 FREETMPS;
430 LEAVE;
431 }
432
433 if (req->grp)
434 {
435 aio_req grp = req->grp;
436
437 /* unlink request */
438 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
439 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
440
441 if (grp->grp_first == req)
442 grp->grp_first = req->grp_next;
443
444 aio_grp_dec (grp);
445 }
446
447 if (SvTRUE (ERRSV))
448 {
449 req_free (req);
450 croak (0);
451 }
452}
453
454static void req_free (aio_req req)
455{
456 if (req->self)
457 {
458 sv_unmagic (req->self, PERL_MAGIC_ext);
459 SvREFCNT_dec (req->self);
460 }
461
462 SvREFCNT_dec (req->data);
463 SvREFCNT_dec (req->fh);
464 SvREFCNT_dec (req->fh2);
465 SvREFCNT_dec (req->callback);
466 Safefree (req->statdata);
467
468 if (req->type == REQ_READDIR)
469 free (req->data2ptr);
470
471 Safefree (req);
472}
473
474static void req_cancel_subs (aio_req grp)
475{
476 aio_req sub;
477
478 if (grp->type != REQ_GROUP)
175 return; 479 return;
176 480
177 fd_set rfd; 481 SvREFCNT_dec (grp->fh2);
178 FD_ZERO(&rfd); 482 grp->fh2 = 0;
179 FD_SET(respipe [0], &rfd);
180 483
181 select (respipe [0] + 1, &rfd, 0, 0, 0); 484 for (sub = grp->grp_first; sub; sub = sub->grp_next)
485 req_cancel (sub);
182} 486}
183 487
184static int 488static void req_cancel (aio_req req)
185poll_cb (pTHX) 489{
490 req->flags |= FLAG_CANCELLED;
491
492 req_cancel_subs (req);
493}
494
495static int poll_cb ()
186{ 496{
187 dSP; 497 dSP;
188 int count = 0; 498 int count = 0;
499 int do_croak = 0;
189 aio_req req; 500 aio_req req;
190
191 {
192 /* read and signals sent by the worker threads */
193 char buf [32];
194 while (read (respipe [0], buf, 32) > 0)
195 ;
196 }
197 501
198 for (;;) 502 for (;;)
199 { 503 {
200 pthread_mutex_lock (&reslock); 504 LOCK (reslock);
505 req = reqq_shift (&res_queue);
201 506
202 req = ress;
203
204 if (ress) 507 if (req)
205 { 508 {
206 ress = ress->next; 509 if (!res_queue.size)
207 if (!ress) rese = 0; 510 {
511 /* read any signals sent by the worker threads */
512 char buf [32];
513 while (read (respipe [0], buf, 32) == 32)
514 ;
515 }
208 } 516 }
209 517
210 pthread_mutex_unlock (&reslock); 518 UNLOCK (reslock);
211 519
212 if (!req) 520 if (!req)
213 break; 521 break;
214 522
215 nreqs--; 523 --nreqs;
216 524
217 if (req->type == REQ_QUIT) 525 if (req->type == REQ_QUIT)
218 started--; 526 started--;
527 else if (req->type == REQ_GROUP && req->length)
528 {
529 req->fd = 1; /* mark request as delayed */
530 continue;
531 }
219 else 532 else
220 { 533 {
221 int errorno = errno;
222 errno = req->errorno;
223
224 if (req->type == REQ_READ) 534 if (req->type == REQ_READ)
225 SvCUR_set (req->data, req->dataoffset 535 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
226 + req->result > 0 ? req->result : 0);
227 536
537 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
538 SvREADONLY_off (req->data);
539
228 if (req->data) 540 if (req->statdata)
229 SvREFCNT_dec (req->data);
230
231 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
232 { 541 {
233 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 542 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
234 PL_laststatval = req->result; 543 PL_laststatval = req->result;
235 PL_statcache = *(req->statdata); 544 PL_statcache = *(req->statdata);
236
237 Safefree (req->statdata);
238 } 545 }
239 546
240 PUSHMARK (SP); 547 req_invoke (req);
241 XPUSHs (sv_2mortal (newSViv (req->result)));
242 548
243 if (req->type == REQ_OPEN)
244 {
245 /* convert fd to fh */
246 SV *fh;
247
248 PUTBACK;
249 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
250 SPAGAIN;
251
252 fh = POPs;
253
254 PUSHMARK (SP);
255 XPUSHs (fh);
256 }
257
258 PUTBACK;
259 call_sv (req->callback, G_VOID | G_EVAL);
260 SPAGAIN;
261
262 if (req->callback)
263 SvREFCNT_dec (req->callback);
264
265 errno = errorno;
266 count++; 549 count++;
267 } 550 }
268 551
269 Safefree (req); 552 req_free (req);
270 } 553 }
271 554
272 return count; 555 return count;
273} 556}
274 557
275static void * 558static void *aio_proc(void *arg);
559
560static void start_thread (void)
561{
562 worker *wrk = calloc (1, sizeof (worker));
563
564 if (!wrk)
565 croak ("unable to allocate worker thread data");
566
567 sigset_t fullsigset, oldsigset;
568 pthread_attr_t attr;
569
570 pthread_attr_init (&attr);
571 pthread_attr_setstacksize (&attr, STACKSIZE);
572 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
573
574 sigfillset (&fullsigset);
575
576 LOCK (wrklock);
577 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
578
579 if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
580 {
581 wrk->prev = &wrk_first;
582 wrk->next = wrk_first.next;
583 wrk_first.next->prev = wrk;
584 wrk_first.next = wrk;
585 started++;
586 }
587 else
588 free (wrk);
589
590 sigprocmask (SIG_SETMASK, &oldsigset, 0);
591 UNLOCK (wrklock);
592}
593
594static void req_send (aio_req req)
595{
596 while (started < wanted && nreqs >= started)
597 start_thread ();
598
599 ++nreqs;
600
601 LOCK (reqlock);
602 reqq_push (&req_queue, req);
603 pthread_cond_signal (&reqwait);
604 UNLOCK (reqlock);
605
606 if (nreqs > max_outstanding)
607 for (;;)
608 {
609 poll_cb ();
610
611 if (nreqs <= max_outstanding)
612 break;
613
614 poll_wait ();
615 }
616}
617
618static void end_thread (void)
619{
620 aio_req req;
621
622 Newz (0, req, 1, aio_cb);
623
624 req->type = REQ_QUIT;
625 req->pri = PRI_MAX + PRI_BIAS;
626
627 req_send (req);
628}
629
630static void min_parallel (int nthreads)
631{
632 if (wanted < nthreads)
633 wanted = nthreads;
634}
635
636static void max_parallel (int nthreads)
637{
638 int cur = started;
639
640 if (wanted > nthreads)
641 wanted = nthreads;
642
643 while (cur > wanted)
644 {
645 end_thread ();
646 cur--;
647 }
648
649 while (started > wanted)
650 {
651 poll_wait ();
652 poll_cb ();
653 }
654}
655
656static void create_pipe ()
657{
658 if (pipe (respipe))
659 croak ("unable to initialize result pipe");
660
661 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
662 croak ("cannot set result pipe to nonblocking mode");
663
664 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
665 croak ("cannot set result pipe to nonblocking mode");
666}
667
668/*****************************************************************************/
669/* work around various missing functions */
670
671#if !HAVE_PREADWRITE
672# define pread aio_pread
673# define pwrite aio_pwrite
674
675/*
676 * make our pread/pwrite safe against themselves, but not against
677 * normal read/write by using a mutex. slows down execution a lot,
678 * but that's your problem, not mine.
679 */
680static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
681
682static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
683{
684 ssize_t res;
685 off_t ooffset;
686
687 LOCK (preadwritelock);
688 ooffset = lseek (fd, 0, SEEK_CUR);
689 lseek (fd, offset, SEEK_SET);
690 res = read (fd, buf, count);
691 lseek (fd, ooffset, SEEK_SET);
692 UNLOCK (preadwritelock);
693
694 return res;
695}
696
697static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
698{
699 ssize_t res;
700 off_t ooffset;
701
702 LOCK (preadwritelock);
703 ooffset = lseek (fd, 0, SEEK_CUR);
704 lseek (fd, offset, SEEK_SET);
705 res = write (fd, buf, count);
706 lseek (fd, offset, SEEK_SET);
707 UNLOCK (preadwritelock);
708
709 return res;
710}
711#endif
712
713#if !HAVE_FDATASYNC
714# define fdatasync fsync
715#endif
716
717#if !HAVE_READAHEAD
718# define readahead aio_readahead
719
720static ssize_t readahead (int fd, off_t offset, size_t count)
721{
722 dBUF;
723
724 while (count > 0)
725 {
726 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
727
728 pread (fd, aio_buf, len, offset);
729 offset += len;
730 count -= len;
731 }
732
733 errno = 0;
734}
735#endif
736
737#if !HAVE_READDIR_R
738# define readdir_r aio_readdir_r
739
740static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
741
742static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
743{
744 struct dirent *e;
745 int errorno;
746
747 LOCK (readdirlock);
748
749 e = readdir (dirp);
750 errorno = errno;
751
752 if (e)
753 {
754 *res = ent;
755 strcpy (ent->d_name, e->d_name);
756 }
757 else
758 *res = 0;
759
760 UNLOCK (readdirlock);
761
762 errno = errorno;
763 return e ? 0 : -1;
764}
765#endif
766
767/* sendfile always needs emulation */
768static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
769{
770 ssize_t res;
771
772 if (!count)
773 return 0;
774
775#if HAVE_SENDFILE
776# if __linux
777 res = sendfile (ofd, ifd, &offset, count);
778
779# elif __freebsd
780 /*
781 * Of course, the freebsd sendfile is a dire hack with no thoughts
782 * wasted on making it similar to other I/O functions.
783 */
784 {
785 off_t sbytes;
786 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
787
788 if (res < 0 && sbytes)
789 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
790 res = sbytes;
791 }
792
793# elif __hpux
794 res = sendfile (ofd, ifd, offset, count, 0, 0);
795
796# elif __solaris
797 {
798 struct sendfilevec vec;
799 size_t sbytes;
800
801 vec.sfv_fd = ifd;
802 vec.sfv_flag = 0;
803 vec.sfv_off = offset;
804 vec.sfv_len = count;
805
806 res = sendfilev (ofd, &vec, 1, &sbytes);
807
808 if (res < 0 && sbytes)
809 res = sbytes;
810 }
811
812# endif
813#else
814 res = -1;
815 errno = ENOSYS;
816#endif
817
818 if (res < 0
819 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
820#if __solaris
821 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
822#endif
823 )
824 )
825 {
826 /* emulate sendfile. this is a major pain in the ass */
827 dBUF;
828
829 res = 0;
830
831 while (count)
832 {
833 ssize_t cnt;
834
835 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
836
837 if (cnt <= 0)
838 {
839 if (cnt && !res) res = -1;
840 break;
841 }
842
843 cnt = write (ofd, aio_buf, cnt);
844
845 if (cnt <= 0)
846 {
847 if (cnt && !res) res = -1;
848 break;
849 }
850
851 offset += cnt;
852 res += cnt;
853 count -= cnt;
854 }
855 }
856
857 return res;
858}
859
860/* read a full directory */
861static void scandir_ (aio_req req, worker *self)
862{
863 DIR *dirp;
864 union
865 {
866 struct dirent d;
867 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
868 } *u;
869 struct dirent *entp;
870 char *name, *names;
871 int memlen = 4096;
872 int memofs = 0;
873 int res = 0;
874 int errorno;
875
876 LOCK (wrklock);
877 self->dirp = dirp = opendir (req->dataptr);
878 self->dbuf = u = malloc (sizeof (*u));
879 UNLOCK (wrklock);
880
881 req->data2ptr = names = malloc (memlen);
882
883 if (dirp && u && names)
884 for (;;)
885 {
886 errno = 0;
887 readdir_r (dirp, &u->d, &entp);
888
889 if (!entp)
890 break;
891
892 name = entp->d_name;
893
894 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
895 {
896 int len = strlen (name) + 1;
897
898 res++;
899
900 while (memofs + len > memlen)
901 {
902 memlen *= 2;
903 LOCK (wrklock);
904 req->data2ptr = names = realloc (names, memlen);
905 UNLOCK (wrklock);
906
907 if (!names)
908 break;
909 }
910
911 memcpy (names + memofs, name, len);
912 memofs += len;
913 }
914 }
915
916 if (errno)
917 res = -1;
918
919 req->result = res;
920}
921
922/*****************************************************************************/
923
276aio_proc (void *thr_arg) 924static void *aio_proc (void *thr_arg)
277{ 925{
278 aio_req req; 926 aio_req req;
279 int type; 927 int type;
928 worker *self = (worker *)thr_arg;
280 929
281 do 930 do
282 { 931 {
283 pthread_mutex_lock (&reqlock); 932 LOCK (reqlock);
284 933
285 for (;;) 934 for (;;)
286 { 935 {
287 req = reqs; 936 self->req = req = reqq_shift (&req_queue);
288
289 if (reqs)
290 {
291 reqs = reqs->next;
292 if (!reqs) reqe = 0;
293 }
294 937
295 if (req) 938 if (req)
296 break; 939 break;
297 940
298 pthread_cond_wait (&reqwait, &reqlock); 941 pthread_cond_wait (&reqwait, &reqlock);
299 } 942 }
300 943
301 pthread_mutex_unlock (&reqlock); 944 UNLOCK (reqlock);
302 945
303 errno = 0; /* strictly unnecessary */ 946 errno = 0; /* strictly unnecessary */
947 type = req->type; /* remember type for QUIT check */
304 948
305 type = req->type; 949 if (!(req->flags & FLAG_CANCELLED))
306
307 switch (type) 950 switch (type)
308 { 951 {
309 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; 952 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
310 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; 953 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
311#if SYS_readahead 954
312 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 955 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
313#else 956 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
314 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
315#endif
316 957
317 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 958 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
318 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 959 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
319 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 960 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
320 961
321 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 962 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
322 case REQ_CLOSE: req->result = close (req->fd); break; 963 case REQ_CLOSE: req->result = close (req->fd); break;
323 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 964 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
324
325 case REQ_FSYNC: req->result = fsync (req->fd); break; 965 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
966 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
967 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
968 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
969
326 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 970 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
971 case REQ_FSYNC: req->result = fsync (req->fd); break;
972 case REQ_READDIR: scandir_ (req, self); break;
327 973
974 case REQ_BUSY:
975 {
976 struct timeval tv;
977
978 tv.tv_sec = req->fd;
979 tv.tv_usec = req->fd2;
980
981 req->result = select (0, 0, 0, 0, &tv);
982 }
983
984 case REQ_GROUP:
985 case REQ_NOP:
328 case REQ_QUIT: 986 case REQ_QUIT:
329 break; 987 break;
330 988
331 default: 989 default:
332 req->result = ENOSYS; 990 req->result = ENOSYS;
333 break; 991 break;
334 } 992 }
335 993
336 req->errorno = errno; 994 req->errorno = errno;
337 995
338 pthread_mutex_lock (&reslock); 996 LOCK (reslock);
339 997
340 req->next = 0; 998 if (!reqq_push (&res_queue, req))
341
342 if (rese)
343 {
344 rese->next = req;
345 rese = req;
346 }
347 else
348 {
349 rese = ress = req;
350
351 /* write a dummy byte to the pipe so fh becomes ready */ 999 /* write a dummy byte to the pipe so fh becomes ready */
352 write (respipe [1], &respipe, 1); 1000 write (respipe [1], &respipe, 1);
353 }
354 1001
355 pthread_mutex_unlock (&reslock); 1002 self->req = 0;
1003 worker_clear (self);
1004
1005 UNLOCK (reslock);
356 } 1006 }
357 while (type != REQ_QUIT); 1007 while (type != REQ_QUIT);
358 1008
1009 LOCK (wrklock);
1010 worker_free (self);
1011 UNLOCK (wrklock);
1012
359 return 0; 1013 return 0;
360} 1014}
361 1015
1016/*****************************************************************************/
1017
1018static void atfork_prepare (void)
1019{
1020 LOCK (wrklock);
1021 LOCK (reqlock);
1022 LOCK (reslock);
1023#if !HAVE_PREADWRITE
1024 LOCK (preadwritelock);
1025#endif
1026#if !HAVE_READDIR_R
1027 LOCK (readdirlock);
1028#endif
1029}
1030
1031static void atfork_parent (void)
1032{
1033#if !HAVE_READDIR_R
1034 UNLOCK (readdirlock);
1035#endif
1036#if !HAVE_PREADWRITE
1037 UNLOCK (preadwritelock);
1038#endif
1039 UNLOCK (reslock);
1040 UNLOCK (reqlock);
1041 UNLOCK (wrklock);
1042}
1043
1044static void atfork_child (void)
1045{
1046 aio_req prv;
1047
1048 while (prv = reqq_shift (&req_queue))
1049 req_free (prv);
1050
1051 while (prv = reqq_shift (&res_queue))
1052 req_free (prv);
1053
1054 while (wrk_first.next != &wrk_first)
1055 {
1056 worker *wrk = wrk_first.next;
1057
1058 if (wrk->req)
1059 req_free (wrk->req);
1060
1061 worker_clear (wrk);
1062 worker_free (wrk);
1063 }
1064
1065 started = 0;
1066 nreqs = 0;
1067
1068 close (respipe [0]);
1069 close (respipe [1]);
1070 create_pipe ();
1071
1072 atfork_parent ();
1073}
1074
1075#define dREQ \
1076 aio_req req; \
1077 int req_pri = next_pri; \
1078 next_pri = DEFAULT_PRI + PRI_BIAS; \
1079 \
1080 if (SvOK (callback) && !SvROK (callback)) \
1081 croak ("callback must be undef or of reference type"); \
1082 \
1083 Newz (0, req, 1, aio_cb); \
1084 if (!req) \
1085 croak ("out of memory during aio_req allocation"); \
1086 \
1087 req->callback = newSVsv (callback); \
1088 req->pri = req_pri
1089
1090#define REQ_SEND \
1091 req_send (req); \
1092 \
1093 if (GIMME_V != G_VOID) \
1094 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1095
362MODULE = IO::AIO PACKAGE = IO::AIO 1096MODULE = IO::AIO PACKAGE = IO::AIO
363 1097
1098PROTOTYPES: ENABLE
1099
364BOOT: 1100BOOT:
365{ 1101{
366 if (pipe (respipe)) 1102 HV *stash = gv_stashpv ("IO::AIO", 1);
367 croak ("unable to initialize result pipe"); 1103 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1104 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1105 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
368 1106
369 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1107 create_pipe ();
370 croak ("cannot set result pipe to nonblocking mode"); 1108 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
371
372 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
373 croak ("cannot set result pipe to nonblocking mode");
374} 1109}
375 1110
376void 1111void
377min_parallel(nthreads) 1112min_parallel (nthreads)
378 int nthreads 1113 int nthreads
379 PROTOTYPE: $ 1114 PROTOTYPE: $
380 CODE:
381 while (nthreads > started)
382 start_thread ();
383 1115
384void 1116void
385max_parallel(nthreads) 1117max_parallel (nthreads)
386 int nthreads 1118 int nthreads
387 PROTOTYPE: $ 1119 PROTOTYPE: $
1120
1121int
1122max_outstanding (nreqs)
1123 int nreqs
1124 PROTOTYPE: $
388 CODE: 1125 CODE:
389{ 1126 RETVAL = max_outstanding;
390 int cur = started; 1127 max_outstanding = nreqs;
391 while (cur > nthreads)
392 {
393 end_thread ();
394 cur--;
395 }
396 1128
397 while (started > nthreads)
398 {
399 poll_wait ();
400 poll_cb (aTHX);
401 }
402}
403
404void 1129void
405aio_open(pathname,flags,mode,callback) 1130aio_open (pathname,flags,mode,callback=&PL_sv_undef)
406 SV * pathname 1131 SV * pathname
407 int flags 1132 int flags
408 int mode 1133 int mode
409 SV * callback 1134 SV * callback
410 PROTOTYPE: $$$$ 1135 PROTOTYPE: $$$;$
411 CODE: 1136 PPCODE:
412{ 1137{
413 aio_req req; 1138 dREQ;
414
415 Newz (0, req, 1, aio_cb);
416
417 if (!req)
418 croak ("out of memory during aio_req allocation");
419 1139
420 req->type = REQ_OPEN; 1140 req->type = REQ_OPEN;
421 req->data = newSVsv (pathname); 1141 req->data = newSVsv (pathname);
422 req->dataptr = SvPV_nolen (req->data); 1142 req->dataptr = SvPVbyte_nolen (req->data);
423 req->fd = flags; 1143 req->fd = flags;
424 req->mode = mode; 1144 req->mode = mode;
425 req->callback = SvREFCNT_inc (callback);
426 1145
427 send_req (req); 1146 REQ_SEND;
428} 1147}
429 1148
430void 1149void
431aio_close(fh,callback) 1150aio_close (fh,callback=&PL_sv_undef)
432 InputStream fh 1151 SV * fh
433 SV * callback 1152 SV * callback
434 PROTOTYPE: $$ 1153 PROTOTYPE: $;$
435 ALIAS: 1154 ALIAS:
436 aio_close = REQ_CLOSE 1155 aio_close = REQ_CLOSE
437 aio_fsync = REQ_FSYNC 1156 aio_fsync = REQ_FSYNC
438 aio_fdatasync = REQ_FDATASYNC 1157 aio_fdatasync = REQ_FDATASYNC
439 CODE: 1158 PPCODE:
1159{
1160 dREQ;
1161
1162 req->type = ix;
1163 req->fh = newSVsv (fh);
1164 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1165
1166 REQ_SEND (req);
1167}
1168
1169void
1170aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1171 SV * fh
1172 UV offset
1173 UV length
1174 SV * data
1175 UV dataoffset
1176 SV * callback
1177 ALIAS:
1178 aio_read = REQ_READ
1179 aio_write = REQ_WRITE
1180 PROTOTYPE: $$$$$;$
1181 PPCODE:
440{ 1182{
441 aio_req req; 1183 aio_req req;
1184 STRLEN svlen;
1185 char *svptr = SvPVbyte (data, svlen);
442 1186
443 Newz (0, req, 1, aio_cb); 1187 SvUPGRADE (data, SVt_PV);
1188 SvPOK_on (data);
444 1189
445 if (!req) 1190 if (dataoffset < 0)
446 croak ("out of memory during aio_req allocation"); 1191 dataoffset += svlen;
447 1192
448 req->type = ix; 1193 if (dataoffset < 0 || dataoffset > svlen)
449 req->fd = PerlIO_fileno (fh); 1194 croak ("data offset outside of string");
450 req->callback = SvREFCNT_inc (callback);
451 1195
452 send_req (req); 1196 if (ix == REQ_WRITE)
453} 1197 {
454 1198 /* write: check length and adjust. */
455void 1199 if (length < 0 || length + dataoffset > svlen)
456aio_read(fh,offset,length,data,dataoffset,callback) 1200 length = svlen - dataoffset;
457 InputStream fh 1201 }
458 UV offset 1202 else
459 IV length 1203 {
460 SV * data 1204 /* read: grow scalar as necessary */
461 IV dataoffset 1205 svptr = SvGROW (data, length + dataoffset);
462 SV * callback 1206 }
463 PROTOTYPE: $$$$$$
464 CODE:
465 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
466
467void
468aio_write(fh,offset,length,data,dataoffset,callback)
469 OutputStream fh
470 UV offset
471 IV length
472 SV * data
473 IV dataoffset
474 SV * callback
475 PROTOTYPE: $$$$$$
476 CODE:
477 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
478
479void
480aio_readahead(fh,offset,length,callback)
481 InputStream fh
482 UV offset
483 IV length
484 SV * callback
485 PROTOTYPE: $$$$
486 CODE:
487{
488 aio_req req;
489 1207
490 if (length < 0) 1208 if (length < 0)
491 croak ("length must not be negative"); 1209 croak ("length must not be negative");
492 1210
493 Newz (0, req, 1, aio_cb); 1211 {
1212 dREQ;
494 1213
495 if (!req) 1214 req->type = ix;
496 croak ("out of memory during aio_req allocation"); 1215 req->fh = newSVsv (fh);
1216 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1217 : IoOFP (sv_2io (fh)));
1218 req->offset = offset;
1219 req->length = length;
1220 req->data = SvREFCNT_inc (data);
1221 req->dataptr = (char *)svptr + dataoffset;
1222
1223 if (!SvREADONLY (data))
1224 {
1225 SvREADONLY_on (data);
1226 req->data2ptr = (void *)data;
1227 }
1228
1229 REQ_SEND;
1230 }
1231}
1232
1233void
1234aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1235 SV * out_fh
1236 SV * in_fh
1237 UV in_offset
1238 UV length
1239 SV * callback
1240 PROTOTYPE: $$$$;$
1241 PPCODE:
1242{
1243 dREQ;
1244
1245 req->type = REQ_SENDFILE;
1246 req->fh = newSVsv (out_fh);
1247 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1248 req->fh2 = newSVsv (in_fh);
1249 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1250 req->offset = in_offset;
1251 req->length = length;
1252
1253 REQ_SEND;
1254}
1255
1256void
1257aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1258 SV * fh
1259 UV offset
1260 IV length
1261 SV * callback
1262 PROTOTYPE: $$$;$
1263 PPCODE:
1264{
1265 dREQ;
497 1266
498 req->type = REQ_READAHEAD; 1267 req->type = REQ_READAHEAD;
1268 req->fh = newSVsv (fh);
499 req->fd = PerlIO_fileno (fh); 1269 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
500 req->offset = offset; 1270 req->offset = offset;
501 req->length = length; 1271 req->length = length;
502 req->callback = SvREFCNT_inc (callback);
503 1272
504 send_req (req); 1273 REQ_SEND;
505} 1274}
506 1275
507void 1276void
508aio_stat(fh_or_path,callback) 1277aio_stat (fh_or_path,callback=&PL_sv_undef)
509 SV * fh_or_path 1278 SV * fh_or_path
510 SV * callback 1279 SV * callback
511 PROTOTYPE: $$
512 ALIAS: 1280 ALIAS:
1281 aio_stat = REQ_STAT
513 aio_lstat = 1 1282 aio_lstat = REQ_LSTAT
514 CODE: 1283 PPCODE:
515{ 1284{
516 aio_req req; 1285 dREQ;
517
518 Newz (0, req, 1, aio_cb);
519
520 if (!req)
521 croak ("out of memory during aio_req allocation");
522 1286
523 New (0, req->statdata, 1, Stat_t); 1287 New (0, req->statdata, 1, Stat_t);
524
525 if (!req->statdata) 1288 if (!req->statdata)
1289 {
1290 req_free (req);
526 croak ("out of memory during aio_req->statdata allocation"); 1291 croak ("out of memory during aio_req->statdata allocation");
1292 }
527 1293
528 if (SvPOK (fh_or_path)) 1294 if (SvPOK (fh_or_path))
529 { 1295 {
530 req->type = ix ? REQ_LSTAT : REQ_STAT; 1296 req->type = ix;
531 req->data = newSVsv (fh_or_path); 1297 req->data = newSVsv (fh_or_path);
532 req->dataptr = SvPV_nolen (req->data); 1298 req->dataptr = SvPVbyte_nolen (req->data);
533 } 1299 }
534 else 1300 else
535 { 1301 {
536 req->type = REQ_FSTAT; 1302 req->type = REQ_FSTAT;
1303 req->fh = newSVsv (fh_or_path);
537 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1304 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
538 } 1305 }
539 1306
540 req->callback = SvREFCNT_inc (callback); 1307 REQ_SEND;
541
542 send_req (req);
543} 1308}
544 1309
545void 1310void
546aio_unlink(pathname,callback) 1311aio_unlink (pathname,callback=&PL_sv_undef)
547 SV * pathname 1312 SV * pathname
548 SV * callback 1313 SV * callback
1314 ALIAS:
1315 aio_unlink = REQ_UNLINK
1316 aio_rmdir = REQ_RMDIR
1317 aio_readdir = REQ_READDIR
1318 PPCODE:
1319{
1320 dREQ;
1321
1322 req->type = ix;
1323 req->data = newSVsv (pathname);
1324 req->dataptr = SvPVbyte_nolen (req->data);
1325
1326 REQ_SEND;
1327}
1328
1329void
1330aio_link (oldpath,newpath,callback=&PL_sv_undef)
1331 SV * oldpath
1332 SV * newpath
1333 SV * callback
1334 ALIAS:
1335 aio_link = REQ_LINK
1336 aio_symlink = REQ_SYMLINK
1337 aio_rename = REQ_RENAME
1338 PPCODE:
1339{
1340 dREQ;
1341
1342 req->type = ix;
1343 req->fh = newSVsv (oldpath);
1344 req->data2ptr = SvPVbyte_nolen (req->fh);
1345 req->data = newSVsv (newpath);
1346 req->dataptr = SvPVbyte_nolen (req->data);
1347
1348 REQ_SEND;
1349}
1350
1351void
1352aio_busy (delay,callback=&PL_sv_undef)
1353 double delay
1354 SV * callback
1355 PPCODE:
1356{
1357 dREQ;
1358
1359 req->type = REQ_BUSY;
1360 req->fd = delay < 0. ? 0 : delay;
1361 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1362
1363 REQ_SEND;
1364}
1365
1366void
1367aio_group (callback=&PL_sv_undef)
1368 SV * callback
549 PROTOTYPE: $$ 1369 PROTOTYPE: ;$
1370 PPCODE:
1371{
1372 dREQ;
1373
1374 req->type = REQ_GROUP;
1375 req_send (req);
1376
1377 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1378}
1379
1380void
1381aio_nop (callback=&PL_sv_undef)
1382 SV * callback
1383 PPCODE:
1384{
1385 dREQ;
1386
1387 req->type = REQ_NOP;
1388
1389 REQ_SEND;
1390}
1391
1392void
1393aioreq_pri (int pri = DEFAULT_PRI)
1394 CODE:
1395 if (pri < PRI_MIN) pri = PRI_MIN;
1396 if (pri > PRI_MAX) pri = PRI_MAX;
1397 next_pri = pri + PRI_BIAS;
1398
1399void
1400aioreq_nice (int nice = 0)
1401 CODE:
1402 nice = next_pri - nice;
1403 if (nice < PRI_MIN) nice = PRI_MIN;
1404 if (nice > PRI_MAX) nice = PRI_MAX;
1405 next_pri = nice + PRI_BIAS;
1406
1407void
1408flush ()
1409 PROTOTYPE:
550 CODE: 1410 CODE:
551{ 1411 while (nreqs)
552 aio_req req; 1412 {
553 1413 poll_wait ();
554 Newz (0, req, 1, aio_cb); 1414 poll_cb ();
555 1415 }
556 if (!req) 1416
557 croak ("out of memory during aio_req allocation"); 1417void
558 1418poll()
559 req->type = REQ_UNLINK; 1419 PROTOTYPE:
560 req->data = newSVsv (pathname); 1420 CODE:
561 req->dataptr = SvPV_nolen (req->data); 1421 if (nreqs)
562 req->callback = SvREFCNT_inc (callback); 1422 {
563 1423 poll_wait ();
564 send_req (req); 1424 poll_cb ();
565} 1425 }
566 1426
567int 1427int
568poll_fileno() 1428poll_fileno()
569 PROTOTYPE: 1429 PROTOTYPE:
570 CODE: 1430 CODE:
… …
574 1434
575int 1435int
576poll_cb(...) 1436poll_cb(...)
577 PROTOTYPE: 1437 PROTOTYPE:
578 CODE: 1438 CODE:
579 RETVAL = poll_cb (aTHX); 1439 RETVAL = poll_cb ();
580 OUTPUT: 1440 OUTPUT:
581 RETVAL 1441 RETVAL
582 1442
583void 1443void
584poll_wait() 1444poll_wait()
… …
593 CODE: 1453 CODE:
594 RETVAL = nreqs; 1454 RETVAL = nreqs;
595 OUTPUT: 1455 OUTPUT:
596 RETVAL 1456 RETVAL
597 1457
1458PROTOTYPES: DISABLE
1459
1460MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1461
1462void
1463cancel (aio_req_ornot req)
1464 CODE:
1465 req_cancel (req);
1466
1467void
1468cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1469 CODE:
1470 SvREFCNT_dec (req->callback);
1471 req->callback = newSVsv (callback);
1472
1473MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1474
1475void
1476add (aio_req grp, ...)
1477 PPCODE:
1478{
1479 int i;
1480 aio_req req;
1481
1482 if (grp->fd == 2)
1483 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1484
1485 for (i = 1; i < items; ++i )
1486 {
1487 if (GIMME_V != G_VOID)
1488 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1489
1490 req = SvAIO_REQ (ST (i));
1491
1492 if (req)
1493 {
1494 ++grp->length;
1495 req->grp = grp;
1496
1497 req->grp_prev = 0;
1498 req->grp_next = grp->grp_first;
1499
1500 if (grp->grp_first)
1501 grp->grp_first->grp_prev = req;
1502
1503 grp->grp_first = req;
1504 }
1505 }
1506}
1507
1508void
1509cancel_subs (aio_req_ornot req)
1510 CODE:
1511 req_cancel_subs (req);
1512
1513void
1514result (aio_req grp, ...)
1515 CODE:
1516{
1517 int i;
1518 AV *av = newAV ();
1519
1520 for (i = 1; i < items; ++i )
1521 av_push (av, newSVsv (ST (i)));
1522
1523 SvREFCNT_dec (grp->data);
1524 grp->data = (SV *)av;
1525}
1526
1527void
1528limit (aio_req grp, int limit)
1529 CODE:
1530 grp->fd2 = limit;
1531 aio_grp_feed (grp);
1532
1533void
1534feed (aio_req grp, SV *callback=&PL_sv_undef)
1535 CODE:
1536{
1537 SvREFCNT_dec (grp->fh2);
1538 grp->fh2 = newSVsv (callback);
1539
1540 if (grp->fd2 <= 0)
1541 grp->fd2 = 2;
1542
1543 aio_grp_feed (grp);
1544}
1545

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