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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.11 by root, Wed Jul 20 21:55:27 2005 UTC vs.
Revision 1.99 by root, Fri Jun 1 05:51:21 2007 UTC

1#define _XOPEN_SOURCE 500 1#include "xthread.h"
2
3#include <errno.h>
2 4
3#include "EXTERN.h" 5#include "EXTERN.h"
4#include "perl.h" 6#include "perl.h"
5#include "XSUB.h" 7#include "XSUB.h"
6 8
9#include "autoconf/config.h"
10
11#include <stddef.h>
12#include <stdlib.h>
13#include <errno.h>
14#include <sys/time.h>
15#include <sys/select.h>
7#include <sys/types.h> 16#include <sys/types.h>
8#include <sys/stat.h> 17#include <sys/stat.h>
9 18#include <limits.h>
10#include <unistd.h> 19#include <unistd.h>
11#include <fcntl.h> 20#include <fcntl.h>
12#include <signal.h> 21#include <signal.h>
13#include <sched.h> 22#include <sched.h>
23#include <utime.h>
24
25#if HAVE_SENDFILE
14#if __linux 26# if __linux
27# include <sys/sendfile.h>
28# elif __freebsd
15#include <sys/syscall.h> 29# include <sys/socket.h>
30# include <sys/uio.h>
31# elif __hpux
32# include <sys/socket.h>
33# elif __solaris /* not yet */
34# include <sys/sendfile.h>
35# else
36# error sendfile support requested but not available
37# endif
16#endif 38#endif
17 39
18#include <pthread.h> 40/* number of seconds after which idle threads exit */
41#define IDLE_TIMEOUT 10
19 42
20typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 43/* used for struct dirent, AIX doesn't provide it */
21typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 44#ifndef NAME_MAX
22typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 45# define NAME_MAX 4096
23
24#if __ia64
25# define STACKSIZE 65536
26#else
27# define STACKSIZE 4096
28#endif 46#endif
47
48/* buffer size for various temporary buffers */
49#define AIO_BUFSIZE 65536
50
51#define dBUF \
52 char *aio_buf; \
53 LOCK (wrklock); \
54 self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
55 UNLOCK (wrklock); \
56 if (!aio_buf) \
57 return -1;
58
59typedef SV SV8; /* byte-sv, used for argument-checking */
29 60
30enum { 61enum {
31 REQ_QUIT, 62 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 63 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 64 REQ_READ, REQ_WRITE, REQ_READAHEAD,
65 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 66 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
67 REQ_UTIME, REQ_FUTIME, /* must be consecutive */
68 REQ_CHMOD, REQ_FCHMOD, /* must be consecutive */
69 REQ_CHOWN, REQ_FCHOWN, /* must be consecutive */
35 REQ_FSYNC, REQ_FDATASYNC, 70 REQ_FSYNC, REQ_FDATASYNC,
71 REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
72 REQ_MKNOD, REQ_READDIR,
73 REQ_LINK, REQ_SYMLINK, REQ_READLINK,
74 REQ_GROUP, REQ_NOP,
75 REQ_BUSY,
36}; 76};
37 77
78#define AIO_REQ_KLASS "IO::AIO::REQ"
79#define AIO_GRP_KLASS "IO::AIO::GRP"
80
38typedef struct aio_cb { 81typedef struct aio_cb
82{
39 struct aio_cb *volatile next; 83 struct aio_cb *volatile next;
40 84
85 SV *callback;
86 SV *sv1, *sv2;
87 void *ptr1, *ptr2;
88 off_t offs;
89 size_t size;
90 ssize_t result;
91 double nv1, nv2;
92
93 STRLEN stroffset;
41 int type; 94 int type;
42 95 int int1, int2, int3;
43 int fd; 96 int errorno;
44 off_t offset;
45 size_t length;
46 ssize_t result;
47 mode_t mode; /* open */ 97 mode_t mode; /* open */
48 int errorno;
49 SV *data, *callback;
50 void *dataptr;
51 STRLEN dataoffset;
52 98
53 Stat_t *statdata; 99 unsigned char flags;
100 unsigned char pri;
101
102 SV *self; /* the perl counterpart of this request, if any */
103 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
54} aio_cb; 104} aio_cb;
55 105
106enum {
107 FLAG_CANCELLED = 0x01, /* request was cancelled */
108 FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
109 FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
110};
111
56typedef aio_cb *aio_req; 112typedef aio_cb *aio_req;
113typedef aio_cb *aio_req_ornot;
57 114
58static int started; 115enum {
59static volatile int nreqs; 116 PRI_MIN = -4,
60static int max_outstanding = 1<<30; 117 PRI_MAX = 4,
118
119 DEFAULT_PRI = 0,
120 PRI_BIAS = -PRI_MIN,
121 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
122};
123
124#define AIO_TICKS ((1000000 + 1023) >> 10)
125
126static unsigned int max_poll_time = 0;
127static unsigned int max_poll_reqs = 0;
128
129/* calculcate time difference in ~1/AIO_TICKS of a second */
130static int tvdiff (struct timeval *tv1, struct timeval *tv2)
131{
132 return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
133 + ((tv2->tv_usec - tv1->tv_usec) >> 10);
134}
135
136static thread_t main_tid;
137static int main_sig;
138static int block_sig_level;
139
140void block_sig ()
141{
142 sigset_t ss;
143
144 if (block_sig_level++)
145 return;
146
147 if (!main_sig)
148 return;
149
150 sigemptyset (&ss);
151 sigaddset (&ss, main_sig);
152 pthread_sigmask (SIG_BLOCK, &ss, 0);
153}
154
155void unblock_sig ()
156{
157 sigset_t ss;
158
159 if (--block_sig_level)
160 return;
161
162 if (!main_sig)
163 return;
164
165 sigemptyset (&ss);
166 sigaddset (&ss, main_sig);
167 pthread_sigmask (SIG_UNBLOCK, &ss, 0);
168}
169
170static int next_pri = DEFAULT_PRI + PRI_BIAS;
171
172static unsigned int started, idle, wanted;
173
174/* worker threads management */
175static mutex_t wrklock = MUTEX_INIT;
176
177typedef struct worker {
178 /* locked by wrklock */
179 struct worker *prev, *next;
180
181 thread_t tid;
182
183 /* locked by reslock, reqlock or wrklock */
184 aio_req req; /* currently processed request */
185 void *dbuf;
186 DIR *dirp;
187} worker;
188
189static worker wrk_first = { &wrk_first, &wrk_first, 0 };
190
191static void worker_clear (worker *wrk)
192{
193 if (wrk->dirp)
194 {
195 closedir (wrk->dirp);
196 wrk->dirp = 0;
197 }
198
199 if (wrk->dbuf)
200 {
201 free (wrk->dbuf);
202 wrk->dbuf = 0;
203 }
204}
205
206static void worker_free (worker *wrk)
207{
208 wrk->next->prev = wrk->prev;
209 wrk->prev->next = wrk->next;
210
211 free (wrk);
212}
213
214static volatile unsigned int nreqs, nready, npending;
215static volatile unsigned int max_idle = 4;
216static volatile unsigned int max_outstanding = 0xffffffff;
61static int respipe [2]; 217static int respipe [2];
62 218
63static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 219static mutex_t reslock = MUTEX_INIT;
64static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 220static mutex_t reqlock = MUTEX_INIT;
65static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 221static cond_t reqwait = COND_INIT;
66 222
67static volatile aio_req reqs, reqe; /* queue start, queue end */ 223#if WORDACCESS_UNSAFE
68static volatile aio_req ress, rese; /* queue start, queue end */
69 224
70static void 225static unsigned int get_nready ()
71poll_wait ()
72{ 226{
73 if (nreqs && !ress) 227 unsigned int retval;
228
229 LOCK (reqlock);
230 retval = nready;
231 UNLOCK (reqlock);
232
233 return retval;
234}
235
236static unsigned int get_npending ()
237{
238 unsigned int retval;
239
240 LOCK (reslock);
241 retval = npending;
242 UNLOCK (reslock);
243
244 return retval;
245}
246
247static unsigned int get_nthreads ()
248{
249 unsigned int retval;
250
251 LOCK (wrklock);
252 retval = started;
253 UNLOCK (wrklock);
254
255 return retval;
256}
257
258#else
259
260# define get_nready() nready
261# define get_npending() npending
262# define get_nthreads() started
263
264#endif
265
266/*
267 * a somewhat faster data structure might be nice, but
268 * with 8 priorities this actually needs <20 insns
269 * per shift, the most expensive operation.
270 */
271typedef struct {
272 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
273 int size;
274} reqq;
275
276static reqq req_queue;
277static reqq res_queue;
278
279int reqq_push (reqq *q, aio_req req)
280{
281 int pri = req->pri;
282 req->next = 0;
283
284 if (q->qe[pri])
74 { 285 {
75 fd_set rfd; 286 q->qe[pri]->next = req;
76 FD_ZERO(&rfd); 287 q->qe[pri] = req;
77 FD_SET(respipe [0], &rfd);
78
79 select (respipe [0] + 1, &rfd, 0, 0, 0);
80 } 288 }
81} 289 else
290 q->qe[pri] = q->qs[pri] = req;
82 291
83static int 292 return q->size++;
84poll_cb () 293}
294
295aio_req reqq_shift (reqq *q)
296{
297 int pri;
298
299 if (!q->size)
300 return 0;
301
302 --q->size;
303
304 for (pri = NUM_PRI; pri--; )
305 {
306 aio_req req = q->qs[pri];
307
308 if (req)
309 {
310 if (!(q->qs[pri] = req->next))
311 q->qe[pri] = 0;
312
313 return req;
314 }
315 }
316
317 abort ();
318}
319
320static int poll_cb ();
321static int req_invoke (aio_req req);
322static void req_free (aio_req req);
323static void req_cancel (aio_req req);
324
325/* must be called at most once */
326static SV *req_sv (aio_req req, const char *klass)
327{
328 if (!req->self)
329 {
330 req->self = (SV *)newHV ();
331 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
332 }
333
334 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
335}
336
337static aio_req SvAIO_REQ (SV *sv)
338{
339 MAGIC *mg;
340
341 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
342 croak ("object of class " AIO_REQ_KLASS " expected");
343
344 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
345
346 return mg ? (aio_req)mg->mg_ptr : 0;
347}
348
349static void aio_grp_feed (aio_req grp)
350{
351 block_sig ();
352
353 while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
354 {
355 int old_len = grp->size;
356
357 if (grp->sv2 && SvOK (grp->sv2))
358 {
359 dSP;
360
361 ENTER;
362 SAVETMPS;
363 PUSHMARK (SP);
364 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
365 PUTBACK;
366 call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
367 SPAGAIN;
368 FREETMPS;
369 LEAVE;
370 }
371
372 /* stop if no progress has been made */
373 if (old_len == grp->size)
374 {
375 SvREFCNT_dec (grp->sv2);
376 grp->sv2 = 0;
377 break;
378 }
379 }
380
381 unblock_sig ();
382}
383
384static void aio_grp_dec (aio_req grp)
385{
386 --grp->size;
387
388 /* call feeder, if applicable */
389 aio_grp_feed (grp);
390
391 /* finish, if done */
392 if (!grp->size && grp->int1)
393 {
394 block_sig ();
395
396 if (!req_invoke (grp))
397 {
398 req_free (grp);
399 unblock_sig ();
400 croak (0);
401 }
402
403 req_free (grp);
404 unblock_sig ();
405 }
406}
407
408static int req_invoke (aio_req req)
85{ 409{
86 dSP; 410 dSP;
87 int count = 0;
88 aio_req req, prv;
89 411
90 static int rl;//D 412 if (req->flags & FLAG_SV1_RO_OFF)
91 //printf ("%d ENTER\n", ++rl);//D 413 SvREADONLY_off (req->sv1);
92 414
93 pthread_mutex_lock (&reslock); 415 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
94
95 {
96 /* read any signals sent by the worker threads */
97 char buf [32];
98 while (read (respipe [0], buf, 32) > 0)
99 ;
100 }
101
102 req = ress;
103 ress = rese = 0;
104
105 pthread_mutex_unlock (&reslock);
106
107 while (req)
108 { 416 {
109 nreqs--; 417 ENTER;
110 //printf ("%d count %d %p->%p\n", rl, count, req, req->next);//D 418 SAVETMPS;
419 PUSHMARK (SP);
420 EXTEND (SP, 1);
111 421
112 if (req->type == REQ_QUIT) 422 switch (req->type)
113 started--;
114 else
115 { 423 {
116 int errorno = errno; 424 case REQ_READDIR:
117 errno = req->errorno;
118
119 if (req->type == REQ_READ)
120 SvCUR_set (req->data, req->dataoffset
121 + req->result > 0 ? req->result : 0);
122
123 if (req->data)
124 SvREFCNT_dec (req->data);
125
126 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
127 { 425 {
128 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 426 SV *rv = &PL_sv_undef;
129 PL_laststatval = req->result;
130 PL_statcache = *(req->statdata);
131 427
132 Safefree (req->statdata); 428 if (req->result >= 0)
429 {
430 int i;
431 char *buf = req->ptr2;
432 AV *av = newAV ();
433
434 av_extend (av, req->result - 1);
435
436 for (i = 0; i < req->result; ++i)
437 {
438 SV *sv = newSVpv (buf, 0);
439
440 av_store (av, i, sv);
441 buf += SvCUR (sv) + 1;
442 }
443
444 rv = sv_2mortal (newRV_noinc ((SV *)av));
445 }
446
447 PUSHs (rv);
133 } 448 }
449 break;
134 450
135 PUSHMARK (SP); 451 case REQ_OPEN:
136 XPUSHs (sv_2mortal (newSViv (req->result)));
137
138 if (req->type == REQ_OPEN)
139 { 452 {
140 /* convert fd to fh */ 453 /* convert fd to fh */
141 SV *fh; 454 SV *fh;
142 455
456 PUSHs (sv_2mortal (newSViv (req->result)));
143 PUTBACK; 457 PUTBACK;
144 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 458 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
145 SPAGAIN; 459 SPAGAIN;
146 460
147 fh = POPs; 461 fh = POPs;
148
149 PUSHMARK (SP); 462 PUSHMARK (SP);
150 XPUSHs (fh); 463 XPUSHs (fh);
151 } 464 }
465 break;
152 466
153 if (SvOK (req->callback)) 467 case REQ_GROUP:
468 req->int1 = 2; /* mark group as finished */
469
470 if (req->sv1)
154 { 471 {
155 PUTBACK; 472 int i;
156 call_sv (req->callback, G_VOID | G_EVAL); 473 AV *av = (AV *)req->sv1;
157 SPAGAIN; 474
475 EXTEND (SP, AvFILL (av) + 1);
476 for (i = 0; i <= AvFILL (av); ++i)
477 PUSHs (*av_fetch (av, i, 0));
158 } 478 }
479 break;
480
481 case REQ_NOP:
482 case REQ_BUSY:
483 break;
484
485 case REQ_READLINK:
486 if (req->result > 0)
159 487 {
160 if (req->callback) 488 SvCUR_set (req->sv2, req->result);
161 SvREFCNT_dec (req->callback); 489 *SvEND (req->sv2) = 0;
490 PUSHs (req->sv2);
491 }
492 break;
162 493
163 errno = errorno; 494 case REQ_STAT:
164 count++; 495 case REQ_LSTAT:
496 case REQ_FSTAT:
497 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
498 PL_laststatval = req->result;
499 PL_statcache = *(Stat_t *)(req->ptr2);
500 PUSHs (sv_2mortal (newSViv (req->result)));
501 break;
502
503 case REQ_READ:
504 SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
505 *SvEND (req->sv2) = 0;
506 PUSHs (sv_2mortal (newSViv (req->result)));
507 break;
508
509 default:
510 PUSHs (sv_2mortal (newSViv (req->result)));
511 break;
165 } 512 }
166 513
167 prv = req; 514 errno = req->errorno;
168 req = req->next;
169 Safefree (prv);
170 515
171 /* TODO: croak on errors? */ 516 PUTBACK;
517 call_sv (req->callback, G_VOID | G_EVAL);
518 SPAGAIN;
519
520 FREETMPS;
521 LEAVE;
172 } 522 }
173 523
174 //printf ("%d LEAVE %p %p\n", rl--, ress, rese);//D 524 if (req->grp)
175 return count; 525 {
526 aio_req grp = req->grp;
527
528 /* unlink request */
529 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
530 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
531
532 if (grp->grp_first == req)
533 grp->grp_first = req->grp_next;
534
535 aio_grp_dec (grp);
536 }
537
538 return !SvTRUE (ERRSV);
539}
540
541static void req_free (aio_req req)
542{
543 if (req->self)
544 {
545 sv_unmagic (req->self, PERL_MAGIC_ext);
546 SvREFCNT_dec (req->self);
547 }
548
549 SvREFCNT_dec (req->sv1);
550 SvREFCNT_dec (req->sv2);
551 SvREFCNT_dec (req->callback);
552
553 if (req->flags & FLAG_PTR2_FREE)
554 free (req->ptr2);
555
556 Safefree (req);
557}
558
559static void req_cancel_subs (aio_req grp)
560{
561 aio_req sub;
562
563 if (grp->type != REQ_GROUP)
564 return;
565
566 SvREFCNT_dec (grp->sv2);
567 grp->sv2 = 0;
568
569 for (sub = grp->grp_first; sub; sub = sub->grp_next)
570 req_cancel (sub);
571}
572
573static void req_cancel (aio_req req)
574{
575 req->flags |= FLAG_CANCELLED;
576
577 req_cancel_subs (req);
176} 578}
177 579
178static void *aio_proc(void *arg); 580static void *aio_proc(void *arg);
179 581
180static void
181start_thread (void) 582static void start_thread (void)
182{ 583{
183 sigset_t fullsigset, oldsigset; 584 worker *wrk = calloc (1, sizeof (worker));
184 pthread_t tid;
185 pthread_attr_t attr;
186 585
187 pthread_attr_init (&attr); 586 if (!wrk)
188 pthread_attr_setstacksize (&attr, STACKSIZE); 587 croak ("unable to allocate worker thread data");
189 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
190 588
191 sigfillset (&fullsigset); 589 LOCK (wrklock);
192 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
193 590
194 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 591 if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
195 started++;
196
197 sigprocmask (SIG_SETMASK, &oldsigset, 0);
198}
199
200static void
201send_req (aio_req req)
202{
203 nreqs++;
204
205 pthread_mutex_lock (&reqlock);
206
207 req->next = 0;
208
209 if (reqe)
210 { 592 {
211 reqe->next = req; 593 wrk->prev = &wrk_first;
212 reqe = req; 594 wrk->next = wrk_first.next;
595 wrk_first.next->prev = wrk;
596 wrk_first.next = wrk;
597 ++started;
213 } 598 }
214 else 599 else
215 reqe = reqs = req; 600 free (wrk);
216 601
217 pthread_cond_signal (&reqwait); 602 UNLOCK (wrklock);
218 pthread_mutex_unlock (&reqlock); 603}
219 604
220 while (nreqs > max_outstanding) 605static void maybe_start_thread ()
606{
607 if (get_nthreads () >= wanted)
608 return;
609
610 /* todo: maybe use idle here, but might be less exact */
611 if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
612 return;
613
614 start_thread ();
615}
616
617static void req_send (aio_req req)
618{
619 block_sig ();
620
621 ++nreqs;
622
623 LOCK (reqlock);
624 ++nready;
625 reqq_push (&req_queue, req);
626 COND_SIGNAL (reqwait);
627 UNLOCK (reqlock);
628
629 unblock_sig ();
630
631 maybe_start_thread ();
632}
633
634static void end_thread (void)
635{
636 aio_req req;
637
638 Newz (0, req, 1, aio_cb);
639
640 req->type = REQ_QUIT;
641 req->pri = PRI_MAX + PRI_BIAS;
642
643 LOCK (reqlock);
644 reqq_push (&req_queue, req);
645 COND_SIGNAL (reqwait);
646 UNLOCK (reqlock);
647
648 LOCK (wrklock);
649 --started;
650 UNLOCK (wrklock);
651}
652
653static void set_max_idle (int nthreads)
654{
655 if (WORDACCESS_UNSAFE) LOCK (reqlock);
656 max_idle = nthreads <= 0 ? 1 : nthreads;
657 if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
658}
659
660static void min_parallel (int nthreads)
661{
662 if (wanted < nthreads)
663 wanted = nthreads;
664}
665
666static void max_parallel (int nthreads)
667{
668 if (wanted > nthreads)
669 wanted = nthreads;
670
671 while (started > wanted)
672 end_thread ();
673}
674
675static void poll_wait ()
676{
677 fd_set rfd;
678
679 while (nreqs)
221 { 680 {
681 int size;
682 if (WORDACCESS_UNSAFE) LOCK (reslock);
683 size = res_queue.size;
684 if (WORDACCESS_UNSAFE) UNLOCK (reslock);
685
686 if (size)
687 return;
688
689 maybe_start_thread ();
690
691 FD_ZERO(&rfd);
692 FD_SET(respipe [0], &rfd);
693
694 select (respipe [0] + 1, &rfd, 0, 0, 0);
695 }
696}
697
698static int poll_cb ()
699{
700 dSP;
701 int count = 0;
702 int maxreqs = max_poll_reqs;
703 int do_croak = 0;
704 struct timeval tv_start, tv_now;
705 aio_req req;
706
707 if (max_poll_time)
708 gettimeofday (&tv_start, 0);
709
710 block_sig ();
711
712 for (;;)
713 {
714 for (;;)
715 {
716 maybe_start_thread ();
717
718 LOCK (reslock);
719 req = reqq_shift (&res_queue);
720
721 if (req)
722 {
723 --npending;
724
725 if (!res_queue.size)
726 {
727 /* read any signals sent by the worker threads */
728 char buf [4];
729 while (read (respipe [0], buf, 4) == 4)
730 ;
731 }
732 }
733
734 UNLOCK (reslock);
735
736 if (!req)
737 break;
738
739 --nreqs;
740
741 if (req->type == REQ_GROUP && req->size)
742 {
743 req->int1 = 1; /* mark request as delayed */
744 continue;
745 }
746 else
747 {
748 if (!req_invoke (req))
749 {
750 req_free (req);
751 unblock_sig ();
752 croak (0);
753 }
754
755 count++;
756 }
757
758 req_free (req);
759
760 if (maxreqs && !--maxreqs)
761 break;
762
763 if (max_poll_time)
764 {
765 gettimeofday (&tv_now, 0);
766
767 if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
768 break;
769 }
770 }
771
772 if (nreqs <= max_outstanding)
773 break;
774
222 poll_wait (); 775 poll_wait ();
223 poll_cb (); 776
777 ++maxreqs;
224 } 778 }
225}
226 779
227static void 780 unblock_sig ();
228end_thread (void) 781 return count;
229{
230 aio_req req;
231 New (0, req, 1, aio_cb);
232 req->type = REQ_QUIT;
233
234 send_req (req);
235} 782}
236 783
237static void 784static void create_pipe ()
238read_write (int dowrite, int fd, off_t offset, size_t length,
239 SV *data, STRLEN dataoffset, SV *callback)
240{ 785{
241 aio_req req; 786 if (pipe (respipe))
242 STRLEN svlen; 787 croak ("unable to initialize result pipe");
243 char *svptr = SvPV (data, svlen);
244 788
245 SvUPGRADE (data, SVt_PV); 789 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
246 SvPOK_on (data); 790 croak ("cannot set result pipe to nonblocking mode");
247 791
248 if (dataoffset < 0) 792 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
249 dataoffset += svlen; 793 croak ("cannot set result pipe to nonblocking mode");
794}
250 795
251 if (dataoffset < 0 || dataoffset > svlen) 796/*****************************************************************************/
252 croak ("data offset outside of string"); 797/* work around various missing functions */
253 798
254 if (dowrite) 799#if !HAVE_PREADWRITE
800# define pread aio_pread
801# define pwrite aio_pwrite
802
803/*
804 * make our pread/pwrite safe against themselves, but not against
805 * normal read/write by using a mutex. slows down execution a lot,
806 * but that's your problem, not mine.
807 */
808static mutex_t preadwritelock = MUTEX_INIT;
809
810static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
811{
812 ssize_t res;
813 off_t ooffset;
814
815 LOCK (preadwritelock);
816 ooffset = lseek (fd, 0, SEEK_CUR);
817 lseek (fd, offset, SEEK_SET);
818 res = read (fd, buf, count);
819 lseek (fd, ooffset, SEEK_SET);
820 UNLOCK (preadwritelock);
821
822 return res;
823}
824
825static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
826{
827 ssize_t res;
828 off_t ooffset;
829
830 LOCK (preadwritelock);
831 ooffset = lseek (fd, 0, SEEK_CUR);
832 lseek (fd, offset, SEEK_SET);
833 res = write (fd, buf, count);
834 lseek (fd, offset, SEEK_SET);
835 UNLOCK (preadwritelock);
836
837 return res;
838}
839#endif
840
841#ifndef HAVE_FUTIMES
842
843# define utimes(path,times) aio_utimes (path, times)
844# define futimes(fd,times) aio_futimes (fd, times)
845
846int aio_utimes (const char *filename, const struct timeval times[2])
847{
848 if (times)
255 { 849 {
256 /* write: check length and adjust. */ 850 struct utimbuf buf;
257 if (length < 0 || length + dataoffset > svlen) 851
258 length = svlen - dataoffset; 852 buf.actime = times[0].tv_sec;
853 buf.modtime = times[1].tv_sec;
854
855 return utime (filename, &buf);
259 } 856 }
260 else 857 else
858 return utime (filename, 0);
859}
860
861int aio_futimes (int fd, const struct timeval tv[2])
862{
863 errno = ENOSYS;
864 return -1;
865}
866
867#endif
868
869#if !HAVE_FDATASYNC
870# define fdatasync fsync
871#endif
872
873#if !HAVE_READAHEAD
874# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
875
876static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
877{
878 dBUF;
879
880 while (count > 0)
261 { 881 {
262 /* read: grow scalar as necessary */ 882 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
263 svptr = SvGROW (data, length + dataoffset); 883
884 pread (fd, aio_buf, len, offset);
885 offset += len;
886 count -= len;
264 } 887 }
265 888
266 if (length < 0) 889 errno = 0;
267 croak ("length must not be negative"); 890}
268 891
269 Newz (0, req, 1, aio_cb); 892#endif
270 893
894#if !HAVE_READDIR_R
895# define readdir_r aio_readdir_r
896
897static mutex_t readdirlock = MUTEX_INIT;
898
899static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
900{
901 struct dirent *e;
902 int errorno;
903
904 LOCK (readdirlock);
905
906 e = readdir (dirp);
907 errorno = errno;
908
271 if (!req) 909 if (e)
272 croak ("out of memory during aio_req allocation"); 910 {
911 *res = ent;
912 strcpy (ent->d_name, e->d_name);
913 }
914 else
915 *res = 0;
273 916
274 req->type = dowrite ? REQ_WRITE : REQ_READ; 917 UNLOCK (readdirlock);
275 req->fd = fd;
276 req->offset = offset;
277 req->length = length;
278 req->data = SvREFCNT_inc (data);
279 req->dataptr = (char *)svptr + dataoffset;
280 req->callback = SvREFCNT_inc (callback);
281 918
282 send_req (req); 919 errno = errorno;
920 return e ? 0 : -1;
283} 921}
922#endif
284 923
285static void * 924/* sendfile always needs emulation */
925static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
926{
927 ssize_t res;
928
929 if (!count)
930 return 0;
931
932#if HAVE_SENDFILE
933# if __linux
934 res = sendfile (ofd, ifd, &offset, count);
935
936# elif __freebsd
937 /*
938 * Of course, the freebsd sendfile is a dire hack with no thoughts
939 * wasted on making it similar to other I/O functions.
940 */
941 {
942 off_t sbytes;
943 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
944
945 if (res < 0 && sbytes)
946 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
947 res = sbytes;
948 }
949
950# elif __hpux
951 res = sendfile (ofd, ifd, offset, count, 0, 0);
952
953# elif __solaris
954 {
955 struct sendfilevec vec;
956 size_t sbytes;
957
958 vec.sfv_fd = ifd;
959 vec.sfv_flag = 0;
960 vec.sfv_off = offset;
961 vec.sfv_len = count;
962
963 res = sendfilev (ofd, &vec, 1, &sbytes);
964
965 if (res < 0 && sbytes)
966 res = sbytes;
967 }
968
969# endif
970#else
971 res = -1;
972 errno = ENOSYS;
973#endif
974
975 if (res < 0
976 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
977#if __solaris
978 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
979#endif
980 )
981 )
982 {
983 /* emulate sendfile. this is a major pain in the ass */
984 dBUF;
985
986 res = 0;
987
988 while (count)
989 {
990 ssize_t cnt;
991
992 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
993
994 if (cnt <= 0)
995 {
996 if (cnt && !res) res = -1;
997 break;
998 }
999
1000 cnt = write (ofd, aio_buf, cnt);
1001
1002 if (cnt <= 0)
1003 {
1004 if (cnt && !res) res = -1;
1005 break;
1006 }
1007
1008 offset += cnt;
1009 res += cnt;
1010 count -= cnt;
1011 }
1012 }
1013
1014 return res;
1015}
1016
1017/* read a full directory */
1018static void scandir_ (aio_req req, worker *self)
1019{
1020 DIR *dirp;
1021 union
1022 {
1023 struct dirent d;
1024 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
1025 } *u;
1026 struct dirent *entp;
1027 char *name, *names;
1028 int memlen = 4096;
1029 int memofs = 0;
1030 int res = 0;
1031 int errorno;
1032
1033 LOCK (wrklock);
1034 self->dirp = dirp = opendir (req->ptr1);
1035 self->dbuf = u = malloc (sizeof (*u));
1036 req->flags |= FLAG_PTR2_FREE;
1037 req->ptr2 = names = malloc (memlen);
1038 UNLOCK (wrklock);
1039
1040 if (dirp && u && names)
1041 for (;;)
1042 {
1043 errno = 0;
1044 readdir_r (dirp, &u->d, &entp);
1045
1046 if (!entp)
1047 break;
1048
1049 name = entp->d_name;
1050
1051 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1052 {
1053 int len = strlen (name) + 1;
1054
1055 res++;
1056
1057 while (memofs + len > memlen)
1058 {
1059 memlen *= 2;
1060 LOCK (wrklock);
1061 req->ptr2 = names = realloc (names, memlen);
1062 UNLOCK (wrklock);
1063
1064 if (!names)
1065 break;
1066 }
1067
1068 memcpy (names + memofs, name, len);
1069 memofs += len;
1070 }
1071 }
1072
1073 if (errno)
1074 res = -1;
1075
1076 req->result = res;
1077}
1078
1079/*****************************************************************************/
1080
286aio_proc (void *thr_arg) 1081static void *aio_proc (void *thr_arg)
287{ 1082{
288 aio_req req; 1083 aio_req req;
289 int type; 1084 struct timespec ts;
1085 worker *self = (worker *)thr_arg;
290 1086
291 do 1087 /* try to distribute timeouts somewhat evenly */
1088 ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1089 * (1000000000UL / 1024UL);
1090
1091 for (;;)
292 { 1092 {
293 pthread_mutex_lock (&reqlock); 1093 ts.tv_sec = time (0) + IDLE_TIMEOUT;
1094
1095 LOCK (reqlock);
294 1096
295 for (;;) 1097 for (;;)
296 { 1098 {
297 req = reqs; 1099 self->req = req = reqq_shift (&req_queue);
298
299 if (reqs)
300 {
301 reqs = reqs->next;
302 if (!reqs) reqe = 0;
303 }
304 1100
305 if (req) 1101 if (req)
306 break; 1102 break;
307 1103
308 pthread_cond_wait (&reqwait, &reqlock); 1104 ++idle;
1105
1106 if (COND_TIMEDWAIT (reqwait, reqlock, ts)
1107 == ETIMEDOUT)
1108 {
1109 if (idle > max_idle)
1110 {
1111 --idle;
1112 UNLOCK (reqlock);
1113 LOCK (wrklock);
1114 --started;
1115 UNLOCK (wrklock);
1116 goto quit;
1117 }
1118
1119 /* we are allowed to idle, so do so without any timeout */
1120 COND_WAIT (reqwait, reqlock);
1121 ts.tv_sec = time (0) + IDLE_TIMEOUT;
1122 }
1123
1124 --idle;
309 } 1125 }
310 1126
311 pthread_mutex_unlock (&reqlock); 1127 --nready;
1128
1129 UNLOCK (reqlock);
312 1130
313 errno = 0; /* strictly unnecessary */ 1131 errno = 0; /* strictly unnecessary */
314 1132
315 type = req->type; 1133 if (!(req->flags & FLAG_CANCELLED))
316
317 switch (type) 1134 switch (req->type)
1135 {
1136 case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1137 case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1138
1139 case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1140 case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1141
1142 case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1143 case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1144 case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1145
1146 case REQ_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
1147 case REQ_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
1148 case REQ_CHMOD: req->result = chmod (req->ptr1, req->mode); break;
1149 case REQ_FCHMOD: req->result = fchmod (req->int1, req->mode); break;
1150
1151 case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1152 case REQ_CLOSE: req->result = close (req->int1); break;
1153 case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1154 case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1155 case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
1156 case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1157 case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1158 case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1159 case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1160 case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1161
1162 case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1163 case REQ_FSYNC: req->result = fsync (req->int1); break;
1164 case REQ_READDIR: scandir_ (req, self); break;
1165
1166 case REQ_BUSY:
1167 {
1168 struct timeval tv;
1169
1170 tv.tv_sec = req->nv1;
1171 tv.tv_usec = (req->nv1 - tv.tv_usec) * 1000000.;
1172
1173 req->result = select (0, 0, 0, 0, &tv);
1174 }
1175
1176 case REQ_UTIME:
1177 case REQ_FUTIME:
1178 {
1179 struct timeval tv[2];
1180 struct timeval *times;
1181
1182 if (req->nv1 != -1. || req->nv2 != -1.)
1183 {
1184 tv[0].tv_sec = req->nv1;
1185 tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
1186 tv[1].tv_sec = req->nv2;
1187 tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
1188
1189 times = tv;
1190 }
1191 else
1192 times = 0;
1193
1194
1195 req->result = req->type == REQ_FUTIME
1196 ? futimes (req->int1, times)
1197 : utimes (req->ptr1, times);
1198 }
1199
1200 case REQ_GROUP:
1201 case REQ_NOP:
1202 break;
1203
1204 case REQ_QUIT:
1205 goto quit;
1206
1207 default:
1208 req->result = -1;
1209 break;
1210 }
1211
1212 req->errorno = errno;
1213
1214 LOCK (reslock);
1215
1216 ++npending;
1217
1218 if (!reqq_push (&res_queue, req))
318 { 1219 {
319 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
320 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
321#if SYS_readahead
322 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
323#else
324 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
325#endif
326
327 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
328 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
329 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
330
331 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
332 case REQ_CLOSE: req->result = close (req->fd); break;
333 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
334
335 case REQ_FSYNC: req->result = fsync (req->fd); break;
336 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
337
338 case REQ_QUIT:
339 break;
340
341 default:
342 req->result = ENOSYS;
343 break;
344 }
345
346 req->errorno = errno;
347
348 pthread_mutex_lock (&reslock);
349
350 req->next = 0;
351
352 if (rese)
353 {
354 rese->next = req;
355 rese = req;
356 }
357 else
358 {
359 rese = ress = req;
360
361 /* write a dummy byte to the pipe so fh becomes ready */ 1220 /* write a dummy byte to the pipe so fh becomes ready */
362 write (respipe [1], &respipe, 1); 1221 write (respipe [1], &respipe, 1);
1222
1223 /* optionally signal the main thread asynchronously */
1224 if (main_sig)
1225 pthread_kill (main_tid, main_sig);
363 } 1226 }
364 1227
365 pthread_mutex_unlock (&reslock); 1228 self->req = 0;
1229 worker_clear (self);
1230
1231 UNLOCK (reslock);
366 } 1232 }
367 while (type != REQ_QUIT); 1233
1234quit:
1235 LOCK (wrklock);
1236 worker_free (self);
1237 UNLOCK (wrklock);
368 1238
369 return 0; 1239 return 0;
370} 1240}
371 1241
1242/*****************************************************************************/
1243
1244static void atfork_prepare (void)
1245{
1246 LOCK (wrklock);
1247 LOCK (reqlock);
1248 LOCK (reslock);
1249#if !HAVE_PREADWRITE
1250 LOCK (preadwritelock);
1251#endif
1252#if !HAVE_READDIR_R
1253 LOCK (readdirlock);
1254#endif
1255}
1256
1257static void atfork_parent (void)
1258{
1259#if !HAVE_READDIR_R
1260 UNLOCK (readdirlock);
1261#endif
1262#if !HAVE_PREADWRITE
1263 UNLOCK (preadwritelock);
1264#endif
1265 UNLOCK (reslock);
1266 UNLOCK (reqlock);
1267 UNLOCK (wrklock);
1268}
1269
1270static void atfork_child (void)
1271{
1272 aio_req prv;
1273
1274 while (prv = reqq_shift (&req_queue))
1275 req_free (prv);
1276
1277 while (prv = reqq_shift (&res_queue))
1278 req_free (prv);
1279
1280 while (wrk_first.next != &wrk_first)
1281 {
1282 worker *wrk = wrk_first.next;
1283
1284 if (wrk->req)
1285 req_free (wrk->req);
1286
1287 worker_clear (wrk);
1288 worker_free (wrk);
1289 }
1290
1291 started = 0;
1292 idle = 0;
1293 nreqs = 0;
1294 nready = 0;
1295 npending = 0;
1296
1297 close (respipe [0]);
1298 close (respipe [1]);
1299 create_pipe ();
1300
1301 atfork_parent ();
1302}
1303
1304#define dREQ \
1305 aio_req req; \
1306 int req_pri = next_pri; \
1307 next_pri = DEFAULT_PRI + PRI_BIAS; \
1308 \
1309 if (SvOK (callback) && !SvROK (callback)) \
1310 croak ("callback must be undef or of reference type"); \
1311 \
1312 Newz (0, req, 1, aio_cb); \
1313 if (!req) \
1314 croak ("out of memory during aio_req allocation"); \
1315 \
1316 req->callback = newSVsv (callback); \
1317 req->pri = req_pri
1318
1319#define REQ_SEND \
1320 req_send (req); \
1321 \
1322 if (GIMME_V != G_VOID) \
1323 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1324
372MODULE = IO::AIO PACKAGE = IO::AIO 1325MODULE = IO::AIO PACKAGE = IO::AIO
373 1326
374PROTOTYPES: ENABLE 1327PROTOTYPES: ENABLE
375 1328
376BOOT: 1329BOOT:
377{ 1330{
378 if (pipe (respipe)) 1331 HV *stash = gv_stashpv ("IO::AIO", 1);
379 croak ("unable to initialize result pipe");
380 1332
381 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1333 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
382 croak ("cannot set result pipe to nonblocking mode"); 1334 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1335 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1336 newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1337 newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1338 newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1339 newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
383 1340
384 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 1341 create_pipe ();
385 croak ("cannot set result pipe to nonblocking mode"); 1342 ATFORK (atfork_prepare, atfork_parent, atfork_child);
386} 1343}
387 1344
388void 1345void
389min_parallel(nthreads) 1346max_poll_reqs (int nreqs)
390 int nthreads
391 PROTOTYPE: $ 1347 PROTOTYPE: $
392 CODE: 1348 CODE:
393 while (nthreads > started) 1349 max_poll_reqs = nreqs;
394 start_thread ();
395 1350
396void 1351void
397max_parallel(nthreads) 1352max_poll_time (double nseconds)
398 int nthreads
399 PROTOTYPE: $ 1353 PROTOTYPE: $
400 CODE: 1354 CODE:
401{ 1355 max_poll_time = nseconds * AIO_TICKS;
402 int cur = started;
403 while (cur > nthreads)
404 {
405 end_thread ();
406 cur--;
407 }
408 1356
409 while (started > nthreads) 1357void
410 { 1358min_parallel (int nthreads)
411 poll_wait (); 1359 PROTOTYPE: $
412 poll_cb (); 1360
413 } 1361void
414} 1362max_parallel (int nthreads)
1363 PROTOTYPE: $
1364
1365void
1366max_idle (int nthreads)
1367 PROTOTYPE: $
1368 CODE:
1369 set_max_idle (nthreads);
415 1370
416int 1371int
417max_outstanding(nreqs) 1372max_outstanding (int maxreqs)
418 int nreqs 1373 PROTOTYPE: $
419 PROTOTYPE: $
420 CODE: 1374 CODE:
421 RETVAL = max_outstanding; 1375 RETVAL = max_outstanding;
422 max_outstanding = nreqs; 1376 max_outstanding = maxreqs;
1377 OUTPUT:
1378 RETVAL
423 1379
424void 1380void
425aio_open(pathname,flags,mode,callback=&PL_sv_undef) 1381aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
426 SV * pathname
427 int flags
428 int mode
429 SV * callback
430 PROTOTYPE: $$$;$ 1382 PROTOTYPE: $$$;$
431 CODE: 1383 PPCODE:
432{ 1384{
433 aio_req req; 1385 dREQ;
434
435 Newz (0, req, 1, aio_cb);
436
437 if (!req)
438 croak ("out of memory during aio_req allocation");
439 1386
440 req->type = REQ_OPEN; 1387 req->type = REQ_OPEN;
441 req->data = newSVsv (pathname); 1388 req->sv1 = newSVsv (pathname);
442 req->dataptr = SvPV_nolen (req->data); 1389 req->ptr1 = SvPVbyte_nolen (req->sv1);
443 req->fd = flags; 1390 req->int1 = flags;
444 req->mode = mode; 1391 req->mode = mode;
445 req->callback = SvREFCNT_inc (callback);
446 1392
447 send_req (req); 1393 REQ_SEND;
448} 1394}
449 1395
450void 1396void
451aio_close(fh,callback=&PL_sv_undef) 1397aio_close (SV *fh, SV *callback=&PL_sv_undef)
452 InputStream fh
453 SV * callback
454 PROTOTYPE: $;$ 1398 PROTOTYPE: $;$
455 ALIAS: 1399 ALIAS:
456 aio_close = REQ_CLOSE 1400 aio_close = REQ_CLOSE
457 aio_fsync = REQ_FSYNC 1401 aio_fsync = REQ_FSYNC
458 aio_fdatasync = REQ_FDATASYNC 1402 aio_fdatasync = REQ_FDATASYNC
459 CODE: 1403 PPCODE:
460{ 1404{
461 aio_req req; 1405 dREQ;
462
463 Newz (0, req, 1, aio_cb);
464
465 if (!req)
466 croak ("out of memory during aio_req allocation");
467 1406
468 req->type = ix; 1407 req->type = ix;
1408 req->sv1 = newSVsv (fh);
469 req->fd = PerlIO_fileno (fh); 1409 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
470 req->callback = SvREFCNT_inc (callback);
471 1410
472 send_req (req); 1411 REQ_SEND (req);
473} 1412}
474 1413
475void 1414void
476aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 1415aio_read (SV *fh, UV offset, UV length, SV8 *data, UV dataoffset, SV *callback=&PL_sv_undef)
477 InputStream fh 1416 ALIAS:
478 UV offset 1417 aio_read = REQ_READ
479 IV length 1418 aio_write = REQ_WRITE
480 SV * data
481 IV dataoffset
482 SV * callback
483 PROTOTYPE: $$$$$;$ 1419 PROTOTYPE: $$$$$;$
484 CODE: 1420 PPCODE:
485 read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
486
487void
488aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
489 OutputStream fh
490 UV offset
491 IV length
492 SV * data
493 IV dataoffset
494 SV * callback
495 PROTOTYPE: $$$$$;$
496 CODE:
497 read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
498
499void
500aio_readahead(fh,offset,length,callback=&PL_sv_undef)
501 InputStream fh
502 UV offset
503 IV length
504 SV * callback
505 PROTOTYPE: $$$;$
506 CODE:
507{ 1421{
508 aio_req req; 1422 STRLEN svlen;
1423 char *svptr = SvPVbyte (data, svlen);
1424
1425 SvUPGRADE (data, SVt_PV);
1426 SvPOK_on (data);
1427
1428 if (dataoffset < 0)
1429 dataoffset += svlen;
1430
1431 if (dataoffset < 0 || dataoffset > svlen)
1432 croak ("data offset outside of string");
1433
1434 if (ix == REQ_WRITE)
1435 {
1436 /* write: check length and adjust. */
1437 if (length < 0 || length + dataoffset > svlen)
1438 length = svlen - dataoffset;
1439 }
1440 else
1441 {
1442 /* read: grow scalar as necessary */
1443 svptr = SvGROW (data, length + dataoffset + 1);
1444 }
509 1445
510 if (length < 0) 1446 if (length < 0)
511 croak ("length must not be negative"); 1447 croak ("length must not be negative");
512 1448
513 Newz (0, req, 1, aio_cb); 1449 {
1450 dREQ;
514 1451
515 if (!req) 1452 req->type = ix;
516 croak ("out of memory during aio_req allocation"); 1453 req->sv1 = newSVsv (fh);
1454 req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1455 : IoOFP (sv_2io (fh)));
1456 req->offs = offset;
1457 req->size = length;
1458 req->sv2 = SvREFCNT_inc (data);
1459 req->ptr1 = (char *)svptr + dataoffset;
1460 req->stroffset = dataoffset;
1461
1462 if (!SvREADONLY (data))
1463 {
1464 SvREADONLY_on (data);
1465 req->flags |= FLAG_SV1_RO_OFF;
1466 }
1467
1468 REQ_SEND;
1469 }
1470}
1471
1472void
1473aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1474 PROTOTYPE: $$;$
1475 PPCODE:
1476{
1477 SV *data;
1478 dREQ;
1479
1480 data = newSV (NAME_MAX);
1481 SvPOK_on (data);
1482
1483 req->type = REQ_READLINK;
1484 req->sv1 = newSVsv (path);
1485 req->ptr2 = SvPVbyte_nolen (req->sv1);
1486 req->sv2 = data;
1487 req->ptr1 = SvPVbyte_nolen (data);
1488
1489 REQ_SEND;
1490}
1491
1492void
1493aio_sendfile (SV *out_fh, SV *in_fh, UV in_offset, UV length, SV *callback=&PL_sv_undef)
1494 PROTOTYPE: $$$$;$
1495 PPCODE:
1496{
1497 dREQ;
1498
1499 req->type = REQ_SENDFILE;
1500 req->sv1 = newSVsv (out_fh);
1501 req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1502 req->sv2 = newSVsv (in_fh);
1503 req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1504 req->offs = in_offset;
1505 req->size = length;
1506
1507 REQ_SEND;
1508}
1509
1510void
1511aio_readahead (SV *fh, UV offset, IV length, SV *callback=&PL_sv_undef)
1512 PROTOTYPE: $$$;$
1513 PPCODE:
1514{
1515 dREQ;
517 1516
518 req->type = REQ_READAHEAD; 1517 req->type = REQ_READAHEAD;
1518 req->sv1 = newSVsv (fh);
519 req->fd = PerlIO_fileno (fh); 1519 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
520 req->offset = offset; 1520 req->offs = offset;
521 req->length = length; 1521 req->size = length;
522 req->callback = SvREFCNT_inc (callback);
523 1522
524 send_req (req); 1523 REQ_SEND;
525} 1524}
526 1525
527void 1526void
528aio_stat(fh_or_path,callback=&PL_sv_undef) 1527aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
529 SV * fh_or_path
530 SV * callback
531 ALIAS: 1528 ALIAS:
532 aio_stat = REQ_STAT 1529 aio_stat = REQ_STAT
533 aio_lstat = REQ_LSTAT 1530 aio_lstat = REQ_LSTAT
534 CODE: 1531 PPCODE:
535{ 1532{
536 aio_req req; 1533 dREQ;
537 1534
538 Newz (0, req, 1, aio_cb); 1535 req->ptr2 = malloc (sizeof (Stat_t));
539
540 if (!req) 1536 if (!req->ptr2)
541 croak ("out of memory during aio_req allocation"); 1537 {
542 1538 req_free (req);
543 New (0, req->statdata, 1, Stat_t);
544
545 if (!req->statdata)
546 croak ("out of memory during aio_req->statdata allocation"); 1539 croak ("out of memory during aio_stat statdata allocation");
1540 }
1541
1542 req->flags |= FLAG_PTR2_FREE;
1543 req->sv1 = newSVsv (fh_or_path);
547 1544
548 if (SvPOK (fh_or_path)) 1545 if (SvPOK (fh_or_path))
549 { 1546 {
550 req->type = ix; 1547 req->type = ix;
551 req->data = newSVsv (fh_or_path);
552 req->dataptr = SvPV_nolen (req->data); 1548 req->ptr1 = SvPVbyte_nolen (req->sv1);
553 } 1549 }
554 else 1550 else
555 { 1551 {
556 req->type = REQ_FSTAT; 1552 req->type = REQ_FSTAT;
557 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1553 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
558 } 1554 }
559 1555
560 req->callback = SvREFCNT_inc (callback); 1556 REQ_SEND;
561
562 send_req (req);
563} 1557}
564 1558
565void 1559void
1560aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1561 PPCODE:
1562{
1563 dREQ;
1564
1565 req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1566 req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1567 req->sv1 = newSVsv (fh_or_path);
1568
1569 if (SvPOK (fh_or_path))
1570 {
1571 req->type = REQ_UTIME;
1572 req->ptr1 = SvPVbyte_nolen (req->sv1);
1573 }
1574 else
1575 {
1576 req->type = REQ_FUTIME;
1577 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1578 }
1579
1580 REQ_SEND;
1581}
1582
1583void
1584aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
1585 PPCODE:
1586{
1587 dREQ;
1588
1589 req->mode = mode;
1590 req->sv1 = newSVsv (fh_or_path);
1591
1592 if (SvPOK (fh_or_path))
1593 {
1594 req->type = REQ_CHMOD;
1595 req->ptr1 = SvPVbyte_nolen (req->sv1);
1596 }
1597 else
1598 {
1599 req->type = REQ_FCHMOD;
1600 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1601 }
1602
1603 REQ_SEND;
1604}
1605
1606void
1607aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1608 PPCODE:
1609{
1610 dREQ;
1611
1612 req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1613 req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1614 req->sv1 = newSVsv (fh_or_path);
1615
1616 if (SvPOK (fh_or_path))
1617 {
1618 req->type = REQ_CHOWN;
1619 req->ptr1 = SvPVbyte_nolen (req->sv1);
1620 }
1621 else
1622 {
1623 req->type = REQ_FCHOWN;
1624 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1625 }
1626
1627 REQ_SEND;
1628}
1629
1630void
566aio_unlink(pathname,callback=&PL_sv_undef) 1631aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
567 SV * pathname 1632 ALIAS:
568 SV * callback 1633 aio_unlink = REQ_UNLINK
1634 aio_rmdir = REQ_RMDIR
1635 aio_readdir = REQ_READDIR
1636 PPCODE:
1637{
1638 dREQ;
1639
1640 req->type = ix;
1641 req->sv1 = newSVsv (pathname);
1642 req->ptr1 = SvPVbyte_nolen (req->sv1);
1643
1644 REQ_SEND;
1645}
1646
1647void
1648aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
1649 PPCODE:
1650{
1651 dREQ;
1652
1653 req->type = REQ_MKDIR;
1654 req->sv1 = newSVsv (pathname);
1655 req->ptr1 = SvPVbyte_nolen (req->sv1);
1656 req->mode = mode;
1657
1658 REQ_SEND;
1659}
1660
1661void
1662aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1663 ALIAS:
1664 aio_link = REQ_LINK
1665 aio_symlink = REQ_SYMLINK
1666 aio_rename = REQ_RENAME
1667 PPCODE:
1668{
1669 dREQ;
1670
1671 req->type = ix;
1672 req->sv2 = newSVsv (oldpath);
1673 req->ptr2 = SvPVbyte_nolen (req->sv2);
1674 req->sv1 = newSVsv (newpath);
1675 req->ptr1 = SvPVbyte_nolen (req->sv1);
1676
1677 REQ_SEND;
1678}
1679
1680void
1681aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1682 PPCODE:
1683{
1684 dREQ;
1685
1686 req->type = REQ_MKNOD;
1687 req->sv1 = newSVsv (pathname);
1688 req->ptr1 = SvPVbyte_nolen (req->sv1);
1689 req->mode = (mode_t)mode;
1690 req->offs = dev;
1691
1692 REQ_SEND;
1693}
1694
1695void
1696aio_busy (double delay, SV *callback=&PL_sv_undef)
1697 PPCODE:
1698{
1699 dREQ;
1700
1701 req->type = REQ_BUSY;
1702 req->nv1 = delay < 0. ? 0. : delay;
1703
1704 REQ_SEND;
1705}
1706
1707void
1708aio_group (SV *callback=&PL_sv_undef)
1709 PROTOTYPE: ;$
1710 PPCODE:
1711{
1712 dREQ;
1713
1714 req->type = REQ_GROUP;
1715
1716 req_send (req);
1717 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1718}
1719
1720void
1721aio_nop (SV *callback=&PL_sv_undef)
1722 PPCODE:
1723{
1724 dREQ;
1725
1726 req->type = REQ_NOP;
1727
1728 REQ_SEND;
1729}
1730
1731int
1732aioreq_pri (int pri = 0)
1733 PROTOTYPE: ;$
569 CODE: 1734 CODE:
570{ 1735 RETVAL = next_pri - PRI_BIAS;
571 aio_req req; 1736 if (items > 0)
572 1737 {
573 Newz (0, req, 1, aio_cb); 1738 if (pri < PRI_MIN) pri = PRI_MIN;
574 1739 if (pri > PRI_MAX) pri = PRI_MAX;
575 if (!req) 1740 next_pri = pri + PRI_BIAS;
576 croak ("out of memory during aio_req allocation"); 1741 }
577 1742 OUTPUT:
578 req->type = REQ_UNLINK; 1743 RETVAL
579 req->data = newSVsv (pathname);
580 req->dataptr = SvPV_nolen (req->data);
581 req->callback = SvREFCNT_inc (callback);
582
583 send_req (req);
584}
585 1744
586void 1745void
1746aioreq_nice (int nice = 0)
1747 CODE:
1748 nice = next_pri - nice;
1749 if (nice < PRI_MIN) nice = PRI_MIN;
1750 if (nice > PRI_MAX) nice = PRI_MAX;
1751 next_pri = nice + PRI_BIAS;
1752
1753void
587flush() 1754flush ()
588 PROTOTYPE: 1755 PROTOTYPE:
589 CODE: 1756 CODE:
590 while (nreqs) 1757 while (nreqs)
591 { 1758 {
592 poll_wait (); 1759 poll_wait ();
593 poll_cb (); 1760 poll_cb ();
594 } 1761 }
595 1762
596void 1763int
597poll() 1764poll()
598 PROTOTYPE: 1765 PROTOTYPE:
599 CODE: 1766 CODE:
600 if (nreqs)
601 {
602 poll_wait (); 1767 poll_wait ();
603 poll_cb (); 1768 RETVAL = poll_cb ();
604 } 1769 OUTPUT:
1770 RETVAL
605 1771
606int 1772int
607poll_fileno() 1773poll_fileno()
608 PROTOTYPE: 1774 PROTOTYPE:
609 CODE: 1775 CODE:
… …
621 1787
622void 1788void
623poll_wait() 1789poll_wait()
624 PROTOTYPE: 1790 PROTOTYPE:
625 CODE: 1791 CODE:
626 if (nreqs)
627 poll_wait (); 1792 poll_wait ();
1793
1794void
1795setsig (int signum = SIGIO)
1796 PROTOTYPE: ;$
1797 CODE:
1798{
1799 if (block_sig_level)
1800 croak ("cannot call IO::AIO::setsig from within aio_block/callback");
1801
1802 LOCK (reslock);
1803 main_tid = pthread_self ();
1804 main_sig = signum;
1805 UNLOCK (reslock);
1806
1807 if (main_sig && npending)
1808 pthread_kill (main_tid, main_sig);
1809}
1810
1811void
1812aio_block (SV *cb)
1813 PROTOTYPE: &
1814 PPCODE:
1815{
1816 int count;
1817
1818 block_sig ();
1819 PUSHMARK (SP);
1820 PUTBACK;
1821 count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
1822 SPAGAIN;
1823 unblock_sig ();
1824
1825 if (SvTRUE (ERRSV))
1826 croak (0);
1827
1828 XSRETURN (count);
1829}
628 1830
629int 1831int
630nreqs() 1832nreqs()
631 PROTOTYPE: 1833 PROTOTYPE:
632 CODE: 1834 CODE:
633 RETVAL = nreqs; 1835 RETVAL = nreqs;
634 OUTPUT: 1836 OUTPUT:
635 RETVAL 1837 RETVAL
636 1838
1839int
1840nready()
1841 PROTOTYPE:
1842 CODE:
1843 RETVAL = get_nready ();
1844 OUTPUT:
1845 RETVAL
1846
1847int
1848npending()
1849 PROTOTYPE:
1850 CODE:
1851 RETVAL = get_npending ();
1852 OUTPUT:
1853 RETVAL
1854
1855int
1856nthreads()
1857 PROTOTYPE:
1858 CODE:
1859 if (WORDACCESS_UNSAFE) LOCK (wrklock);
1860 RETVAL = started;
1861 if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1862 OUTPUT:
1863 RETVAL
1864
1865PROTOTYPES: DISABLE
1866
1867MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1868
1869void
1870cancel (aio_req_ornot req)
1871 CODE:
1872 req_cancel (req);
1873
1874void
1875cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1876 CODE:
1877 SvREFCNT_dec (req->callback);
1878 req->callback = newSVsv (callback);
1879
1880MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1881
1882void
1883add (aio_req grp, ...)
1884 PPCODE:
1885{
1886 int i;
1887 aio_req req;
1888
1889 if (main_sig && !block_sig_level)
1890 croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
1891
1892 if (grp->int1 == 2)
1893 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1894
1895 for (i = 1; i < items; ++i )
1896 {
1897 if (GIMME_V != G_VOID)
1898 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1899
1900 req = SvAIO_REQ (ST (i));
1901
1902 if (req)
1903 {
1904 ++grp->size;
1905 req->grp = grp;
1906
1907 req->grp_prev = 0;
1908 req->grp_next = grp->grp_first;
1909
1910 if (grp->grp_first)
1911 grp->grp_first->grp_prev = req;
1912
1913 grp->grp_first = req;
1914 }
1915 }
1916}
1917
1918void
1919cancel_subs (aio_req_ornot req)
1920 CODE:
1921 req_cancel_subs (req);
1922
1923void
1924result (aio_req grp, ...)
1925 CODE:
1926{
1927 int i;
1928 AV *av;
1929
1930 grp->errorno = errno;
1931
1932 av = newAV ();
1933
1934 for (i = 1; i < items; ++i )
1935 av_push (av, newSVsv (ST (i)));
1936
1937 SvREFCNT_dec (grp->sv1);
1938 grp->sv1 = (SV *)av;
1939}
1940
1941void
1942errno (aio_req grp, int errorno = errno)
1943 CODE:
1944 grp->errorno = errorno;
1945
1946void
1947limit (aio_req grp, int limit)
1948 CODE:
1949 grp->int2 = limit;
1950 aio_grp_feed (grp);
1951
1952void
1953feed (aio_req grp, SV *callback=&PL_sv_undef)
1954 CODE:
1955{
1956 SvREFCNT_dec (grp->sv2);
1957 grp->sv2 = newSVsv (callback);
1958
1959 if (grp->int2 <= 0)
1960 grp->int2 = 2;
1961
1962 aio_grp_feed (grp);
1963}
1964

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