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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.14 by root, Sat Jul 23 18:15:36 2005 UTC vs.
Revision 1.96 by root, Sat Dec 23 04:49:37 2006 UTC

1/* solaris */
2#define _POSIX_PTHREAD_SEMANTICS 1
3
4#if __linux && !defined(_GNU_SOURCE)
5# define _GNU_SOURCE
6#endif
7
8/* just in case */
9#define _REENTRANT 1
10
11#include <errno.h>
12
13#include "EXTERN.h"
1#include "perl.h" 14#include "perl.h"
2#include "XSUB.h" 15#include "XSUB.h"
3 16
17#include "autoconf/config.h"
18
19#include <pthread.h>
20
21#include <stddef.h>
22#include <stdlib.h>
23#include <errno.h>
24#include <sys/time.h>
25#include <sys/select.h>
4#include <sys/types.h> 26#include <sys/types.h>
5#include <sys/stat.h> 27#include <sys/stat.h>
6 28#include <limits.h>
7#include <unistd.h> 29#include <unistd.h>
8#include <fcntl.h> 30#include <fcntl.h>
9#include <signal.h> 31#include <signal.h>
10#include <sched.h> 32#include <sched.h>
33
34#if HAVE_SENDFILE
11#if __linux 35# if __linux
36# include <sys/sendfile.h>
37# elif __freebsd
12#include <sys/syscall.h> 38# include <sys/socket.h>
39# include <sys/uio.h>
40# elif __hpux
41# include <sys/socket.h>
42# elif __solaris /* not yet */
43# include <sys/sendfile.h>
44# else
45# error sendfile support requested but not available
46# endif
13#endif 47#endif
14 48
15#include <pthread.h> 49/* number of seconds after which idle threads exit */
50#define IDLE_TIMEOUT 10
16 51
17typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 52/* used for struct dirent, AIX doesn't provide it */
18typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 53#ifndef NAME_MAX
19typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 54# define NAME_MAX 4096
55#endif
56
57#ifndef PTHREAD_STACK_MIN
58/* care for broken platforms, e.g. windows */
59# define PTHREAD_STACK_MIN 16384
60#endif
20 61
21#if __ia64 62#if __ia64
22# define STACKSIZE 65536 63# define STACKSIZE 65536
64#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
65# define STACKSIZE PTHREAD_STACK_MIN
23#else 66#else
24# define STACKSIZE 4096 67# define STACKSIZE 16384
25#endif 68#endif
69
70/* wether word reads are potentially non-atomic.
71 * this is conservatice, likely most arches this runs
72 * on have atomic word read/writes.
73 */
74#ifndef WORDACCESS_UNSAFE
75# if __i386 || __x86_64
76# define WORDACCESS_UNSAFE 0
77# else
78# define WORDACCESS_UNSAFE 1
79# endif
80#endif
81
82/* buffer size for various temporary buffers */
83#define AIO_BUFSIZE 65536
84
85#define dBUF \
86 char *aio_buf; \
87 LOCK (wrklock); \
88 self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
89 UNLOCK (wrklock); \
90 if (!aio_buf) \
91 return -1;
92
93typedef SV SV8; /* byte-sv, used for argument-checking */
26 94
27enum { 95enum {
28 REQ_QUIT, 96 REQ_QUIT,
29 REQ_OPEN, REQ_CLOSE, 97 REQ_OPEN, REQ_CLOSE,
30 REQ_READ, REQ_WRITE, REQ_READAHEAD, 98 REQ_READ, REQ_WRITE, REQ_READAHEAD,
99 REQ_SENDFILE,
31 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 100 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
32 REQ_FSYNC, REQ_FDATASYNC, 101 REQ_FSYNC, REQ_FDATASYNC,
102 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
103 REQ_MKNOD, REQ_READDIR,
104 REQ_LINK, REQ_SYMLINK, REQ_READLINK,
105 REQ_GROUP, REQ_NOP,
106 REQ_BUSY,
33}; 107};
34 108
109#define AIO_REQ_KLASS "IO::AIO::REQ"
110#define AIO_GRP_KLASS "IO::AIO::GRP"
111
35typedef struct aio_cb { 112typedef struct aio_cb
113{
36 struct aio_cb *volatile next; 114 struct aio_cb *volatile next;
37 115
116 SV *callback, *fh;
117 SV *sv1, *sv2;
118 void *ptr1, *ptr2;
119 off_t offs;
120 size_t size;
121 ssize_t result;
122
123 STRLEN stroffset;
38 int type; 124 int type;
39 125 int int1, int2;
40 int fd; 126 int errorno;
41 off_t offset;
42 size_t length;
43 ssize_t result;
44 mode_t mode; /* open */ 127 mode_t mode; /* open */
45 int errorno;
46 SV *data, *callback, *fh;
47 void *dataptr;
48 STRLEN dataoffset;
49 128
50 Stat_t *statdata; 129 unsigned char flags;
130 unsigned char pri;
131
132 SV *self; /* the perl counterpart of this request, if any */
133 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
51} aio_cb; 134} aio_cb;
52 135
136enum {
137 FLAG_CANCELLED = 0x01, /* request was cancelled */
138 FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
139 FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
140};
141
53typedef aio_cb *aio_req; 142typedef aio_cb *aio_req;
143typedef aio_cb *aio_req_ornot;
54 144
55static int started; 145enum {
56static volatile int nreqs; 146 PRI_MIN = -4,
57static int max_outstanding = 1<<30; 147 PRI_MAX = 4,
148
149 DEFAULT_PRI = 0,
150 PRI_BIAS = -PRI_MIN,
151 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
152};
153
154#define AIO_TICKS ((1000000 + 1023) >> 10)
155
156static unsigned int max_poll_time = 0;
157static unsigned int max_poll_reqs = 0;
158
159/* calculcate time difference in ~1/AIO_TICKS of a second */
160static int tvdiff (struct timeval *tv1, struct timeval *tv2)
161{
162 return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
163 + ((tv2->tv_usec - tv1->tv_usec) >> 10);
164}
165
166static pthread_t main_tid;
167static int main_sig;
168static int block_sig_level;
169
170void block_sig ()
171{
172 sigset_t ss;
173
174 if (block_sig_level++)
175 return;
176
177 if (!main_sig)
178 return;
179
180 sigemptyset (&ss);
181 sigaddset (&ss, main_sig);
182 pthread_sigmask (SIG_BLOCK, &ss, 0);
183}
184
185void unblock_sig ()
186{
187 sigset_t ss;
188
189 if (--block_sig_level)
190 return;
191
192 if (!main_sig)
193 return;
194
195 sigemptyset (&ss);
196 sigaddset (&ss, main_sig);
197 pthread_sigmask (SIG_UNBLOCK, &ss, 0);
198}
199
200static int next_pri = DEFAULT_PRI + PRI_BIAS;
201
202static unsigned int started, idle, wanted;
203
204#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
205# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
206#else
207# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
208#endif
209
210#define LOCK(mutex) pthread_mutex_lock (&(mutex))
211#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
212
213/* worker threads management */
214static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
215
216typedef struct worker {
217 /* locked by wrklock */
218 struct worker *prev, *next;
219
220 pthread_t tid;
221
222 /* locked by reslock, reqlock or wrklock */
223 aio_req req; /* currently processed request */
224 void *dbuf;
225 DIR *dirp;
226} worker;
227
228static worker wrk_first = { &wrk_first, &wrk_first, 0 };
229
230static void worker_clear (worker *wrk)
231{
232 if (wrk->dirp)
233 {
234 closedir (wrk->dirp);
235 wrk->dirp = 0;
236 }
237
238 if (wrk->dbuf)
239 {
240 free (wrk->dbuf);
241 wrk->dbuf = 0;
242 }
243}
244
245static void worker_free (worker *wrk)
246{
247 wrk->next->prev = wrk->prev;
248 wrk->prev->next = wrk->next;
249
250 free (wrk);
251}
252
253static volatile unsigned int nreqs, nready, npending;
254static volatile unsigned int max_idle = 4;
255static volatile unsigned int max_outstanding = 0xffffffff;
58static int respipe [2]; 256static int respipe [2];
59 257
60static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 258static pthread_mutex_t reslock = AIO_MUTEX_INIT;
61static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 259static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
62static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 260static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
63 261
64static volatile aio_req reqs, reqe; /* queue start, queue end */ 262#if WORDACCESS_UNSAFE
65static volatile aio_req ress, rese; /* queue start, queue end */
66 263
67static void 264static unsigned int get_nready ()
68poll_wait ()
69{ 265{
70 if (nreqs && !ress) 266 unsigned int retval;
267
268 LOCK (reqlock);
269 retval = nready;
270 UNLOCK (reqlock);
271
272 return retval;
273}
274
275static unsigned int get_npending ()
276{
277 unsigned int retval;
278
279 LOCK (reslock);
280 retval = npending;
281 UNLOCK (reslock);
282
283 return retval;
284}
285
286static unsigned int get_nthreads ()
287{
288 unsigned int retval;
289
290 LOCK (wrklock);
291 retval = started;
292 UNLOCK (wrklock);
293
294 return retval;
295}
296
297#else
298
299# define get_nready() nready
300# define get_npending() npending
301# define get_nthreads() started
302
303#endif
304
305/*
306 * a somewhat faster data structure might be nice, but
307 * with 8 priorities this actually needs <20 insns
308 * per shift, the most expensive operation.
309 */
310typedef struct {
311 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
312 int size;
313} reqq;
314
315static reqq req_queue;
316static reqq res_queue;
317
318int reqq_push (reqq *q, aio_req req)
319{
320 int pri = req->pri;
321 req->next = 0;
322
323 if (q->qe[pri])
71 { 324 {
72 fd_set rfd; 325 q->qe[pri]->next = req;
73 FD_ZERO(&rfd); 326 q->qe[pri] = req;
74 FD_SET(respipe [0], &rfd);
75
76 select (respipe [0] + 1, &rfd, 0, 0, 0);
77 } 327 }
78} 328 else
329 q->qe[pri] = q->qs[pri] = req;
79 330
80static int 331 return q->size++;
81poll_cb () 332}
333
334aio_req reqq_shift (reqq *q)
335{
336 int pri;
337
338 if (!q->size)
339 return 0;
340
341 --q->size;
342
343 for (pri = NUM_PRI; pri--; )
344 {
345 aio_req req = q->qs[pri];
346
347 if (req)
348 {
349 if (!(q->qs[pri] = req->next))
350 q->qe[pri] = 0;
351
352 return req;
353 }
354 }
355
356 abort ();
357}
358
359static int poll_cb ();
360static int req_invoke (aio_req req);
361static void req_free (aio_req req);
362static void req_cancel (aio_req req);
363
364/* must be called at most once */
365static SV *req_sv (aio_req req, const char *klass)
366{
367 if (!req->self)
368 {
369 req->self = (SV *)newHV ();
370 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
371 }
372
373 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
374}
375
376static aio_req SvAIO_REQ (SV *sv)
377{
378 MAGIC *mg;
379
380 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
381 croak ("object of class " AIO_REQ_KLASS " expected");
382
383 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
384
385 return mg ? (aio_req)mg->mg_ptr : 0;
386}
387
388static void aio_grp_feed (aio_req grp)
389{
390 block_sig ();
391
392 while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
393 {
394 int old_len = grp->size;
395
396 if (grp->sv2 && SvOK (grp->sv2))
397 {
398 dSP;
399
400 ENTER;
401 SAVETMPS;
402 PUSHMARK (SP);
403 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
404 PUTBACK;
405 call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
406 SPAGAIN;
407 FREETMPS;
408 LEAVE;
409 }
410
411 /* stop if no progress has been made */
412 if (old_len == grp->size)
413 {
414 SvREFCNT_dec (grp->sv2);
415 grp->sv2 = 0;
416 break;
417 }
418 }
419
420 unblock_sig ();
421}
422
423static void aio_grp_dec (aio_req grp)
424{
425 --grp->size;
426
427 /* call feeder, if applicable */
428 aio_grp_feed (grp);
429
430 /* finish, if done */
431 if (!grp->size && grp->int1)
432 {
433 block_sig ();
434
435 if (!req_invoke (grp))
436 {
437 req_free (grp);
438 unblock_sig ();
439 croak (0);
440 }
441
442 req_free (grp);
443 unblock_sig ();
444 }
445}
446
447static int req_invoke (aio_req req)
82{ 448{
83 dSP; 449 dSP;
84 int count = 0;
85 aio_req req, prv;
86 450
87 pthread_mutex_lock (&reslock); 451 if (req->flags & FLAG_SV1_RO_OFF)
452 SvREADONLY_off (req->sv1);
88 453
89 { 454 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
90 /* read any signals sent by the worker threads */
91 char buf [32];
92 while (read (respipe [0], buf, 32) > 0)
93 ;
94 }
95
96 req = ress;
97 ress = rese = 0;
98
99 pthread_mutex_unlock (&reslock);
100
101 while (req)
102 { 455 {
103 nreqs--; 456 ENTER;
457 SAVETMPS;
458 PUSHMARK (SP);
459 EXTEND (SP, 1);
104 460
105 if (req->type == REQ_QUIT) 461 switch (req->type)
106 started--;
107 else
108 { 462 {
109 int errorno = errno; 463 case REQ_READDIR:
110 errno = req->errorno;
111
112 if (req->type == REQ_READ)
113 SvCUR_set (req->data, req->dataoffset
114 + req->result > 0 ? req->result : 0);
115
116 if (req->data)
117 SvREFCNT_dec (req->data);
118
119 if (req->fh)
120 SvREFCNT_dec (req->fh);
121
122 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
123 { 464 {
124 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 465 SV *rv = &PL_sv_undef;
125 PL_laststatval = req->result;
126 PL_statcache = *(req->statdata);
127 466
128 Safefree (req->statdata); 467 if (req->result >= 0)
468 {
469 int i;
470 char *buf = req->ptr2;
471 AV *av = newAV ();
472
473 av_extend (av, req->result - 1);
474
475 for (i = 0; i < req->result; ++i)
476 {
477 SV *sv = newSVpv (buf, 0);
478
479 av_store (av, i, sv);
480 buf += SvCUR (sv) + 1;
481 }
482
483 rv = sv_2mortal (newRV_noinc ((SV *)av));
484 }
485
486 PUSHs (rv);
129 } 487 }
488 break;
130 489
131 ENTER; 490 case REQ_OPEN:
132 PUSHMARK (SP);
133 XPUSHs (sv_2mortal (newSViv (req->result)));
134
135 if (req->type == REQ_OPEN)
136 { 491 {
137 /* convert fd to fh */ 492 /* convert fd to fh */
138 SV *fh; 493 SV *fh;
139 494
495 PUSHs (sv_2mortal (newSViv (req->result)));
140 PUTBACK; 496 PUTBACK;
141 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 497 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
142 SPAGAIN; 498 SPAGAIN;
143 499
144 fh = SvREFCNT_inc (POPs); 500 fh = POPs;
145
146 PUSHMARK (SP); 501 PUSHMARK (SP);
147 XPUSHs (sv_2mortal (fh)); 502 XPUSHs (fh);
148 } 503 }
504 break;
149 505
150 if (SvOK (req->callback)) 506 case REQ_GROUP:
507 req->int1 = 2; /* mark group as finished */
508
509 if (req->sv1)
151 { 510 {
152 PUTBACK; 511 int i;
153 call_sv (req->callback, G_VOID | G_EVAL); 512 AV *av = (AV *)req->sv1;
154 SPAGAIN; 513
514 EXTEND (SP, AvFILL (av) + 1);
515 for (i = 0; i <= AvFILL (av); ++i)
516 PUSHs (*av_fetch (av, i, 0));
155 } 517 }
518 break;
156 519
157 LEAVE; 520 case REQ_NOP:
521 case REQ_BUSY:
522 break;
523
524 case REQ_READLINK:
525 if (req->result > 0)
158 526 {
159 if (req->callback) 527 SvCUR_set (req->sv1, req->result);
160 SvREFCNT_dec (req->callback); 528 *SvEND (req->sv1) = 0;
529 PUSHs (req->sv1);
530 }
531 break;
161 532
162 errno = errorno; 533 case REQ_STAT:
163 count++; 534 case REQ_LSTAT:
535 case REQ_FSTAT:
536 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
537 PL_laststatval = req->result;
538 PL_statcache = *(Stat_t *)(req->ptr2);
539 PUSHs (sv_2mortal (newSViv (req->result)));
540 break;
541
542 case REQ_READ:
543 SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
544 *SvEND (req->sv1) = 0;
545 PUSHs (sv_2mortal (newSViv (req->result)));
546 break;
547
548 default:
549 PUSHs (sv_2mortal (newSViv (req->result)));
550 break;
164 } 551 }
165 552
166 prv = req; 553 errno = req->errorno;
167 req = req->next;
168 Safefree (prv);
169 554
170 /* TODO: croak on errors? */ 555 PUTBACK;
556 call_sv (req->callback, G_VOID | G_EVAL);
557 SPAGAIN;
558
559 FREETMPS;
560 LEAVE;
171 } 561 }
172 562
173 return count; 563 if (req->grp)
564 {
565 aio_req grp = req->grp;
566
567 /* unlink request */
568 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
569 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
570
571 if (grp->grp_first == req)
572 grp->grp_first = req->grp_next;
573
574 aio_grp_dec (grp);
575 }
576
577 return !SvTRUE (ERRSV);
578}
579
580static void req_free (aio_req req)
581{
582 if (req->self)
583 {
584 sv_unmagic (req->self, PERL_MAGIC_ext);
585 SvREFCNT_dec (req->self);
586 }
587
588 SvREFCNT_dec (req->fh);
589 SvREFCNT_dec (req->sv1);
590 SvREFCNT_dec (req->sv2);
591 SvREFCNT_dec (req->callback);
592
593 if (req->flags & FLAG_PTR2_FREE)
594 free (req->ptr2);
595
596 Safefree (req);
597}
598
599static void req_cancel_subs (aio_req grp)
600{
601 aio_req sub;
602
603 if (grp->type != REQ_GROUP)
604 return;
605
606 SvREFCNT_dec (grp->sv2);
607 grp->sv2 = 0;
608
609 for (sub = grp->grp_first; sub; sub = sub->grp_next)
610 req_cancel (sub);
611}
612
613static void req_cancel (aio_req req)
614{
615 req->flags |= FLAG_CANCELLED;
616
617 req_cancel_subs (req);
174} 618}
175 619
176static void *aio_proc(void *arg); 620static void *aio_proc(void *arg);
177 621
178static void
179start_thread (void) 622static void start_thread (void)
180{ 623{
181 sigset_t fullsigset, oldsigset; 624 sigset_t fullsigset, oldsigset;
182 pthread_t tid;
183 pthread_attr_t attr; 625 pthread_attr_t attr;
626
627 worker *wrk = calloc (1, sizeof (worker));
628
629 if (!wrk)
630 croak ("unable to allocate worker thread data");
184 631
185 pthread_attr_init (&attr); 632 pthread_attr_init (&attr);
186 pthread_attr_setstacksize (&attr, STACKSIZE); 633 pthread_attr_setstacksize (&attr, STACKSIZE);
187 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 634 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
635#ifdef PTHREAD_SCOPE_PROCESS
636 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
637#endif
188 638
189 sigfillset (&fullsigset); 639 sigfillset (&fullsigset);
640
641 LOCK (wrklock);
190 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); 642 pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
191 643
192 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 644 if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
193 started++;
194
195 sigprocmask (SIG_SETMASK, &oldsigset, 0);
196}
197
198static void
199send_req (aio_req req)
200{
201 nreqs++;
202
203 pthread_mutex_lock (&reqlock);
204
205 req->next = 0;
206
207 if (reqe)
208 { 645 {
209 reqe->next = req; 646 wrk->prev = &wrk_first;
210 reqe = req; 647 wrk->next = wrk_first.next;
648 wrk_first.next->prev = wrk;
649 wrk_first.next = wrk;
650 ++started;
211 } 651 }
212 else 652 else
213 reqe = reqs = req; 653 free (wrk);
214 654
655 pthread_sigmask (SIG_SETMASK, &oldsigset, 0);
656 UNLOCK (wrklock);
657}
658
659static void maybe_start_thread ()
660{
661 if (get_nthreads () >= wanted)
662 return;
663
664 /* todo: maybe use idle here, but might be less exact */
665 if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
666 return;
667
668 start_thread ();
669}
670
671static void req_send (aio_req req)
672{
673 block_sig ();
674
675 ++nreqs;
676
677 LOCK (reqlock);
678 ++nready;
679 reqq_push (&req_queue, req);
215 pthread_cond_signal (&reqwait); 680 pthread_cond_signal (&reqwait);
216 pthread_mutex_unlock (&reqlock); 681 UNLOCK (reqlock);
217 682
218 while (nreqs > max_outstanding) 683 unblock_sig ();
684
685 maybe_start_thread ();
686}
687
688static void end_thread (void)
689{
690 aio_req req;
691
692 Newz (0, req, 1, aio_cb);
693
694 req->type = REQ_QUIT;
695 req->pri = PRI_MAX + PRI_BIAS;
696
697 LOCK (reqlock);
698 reqq_push (&req_queue, req);
699 pthread_cond_signal (&reqwait);
700 UNLOCK (reqlock);
701
702 LOCK (wrklock);
703 --started;
704 UNLOCK (wrklock);
705}
706
707static void set_max_idle (int nthreads)
708{
709 if (WORDACCESS_UNSAFE) LOCK (reqlock);
710 max_idle = nthreads <= 0 ? 1 : nthreads;
711 if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
712}
713
714static void min_parallel (int nthreads)
715{
716 if (wanted < nthreads)
717 wanted = nthreads;
718}
719
720static void max_parallel (int nthreads)
721{
722 if (wanted > nthreads)
723 wanted = nthreads;
724
725 while (started > wanted)
726 end_thread ();
727}
728
729static void poll_wait ()
730{
731 fd_set rfd;
732
733 while (nreqs)
219 { 734 {
220 poll_wait (); 735 int size;
221 poll_cb (); 736 if (WORDACCESS_UNSAFE) LOCK (reslock);
737 size = res_queue.size;
738 if (WORDACCESS_UNSAFE) UNLOCK (reslock);
739
740 if (size)
741 return;
742
743 maybe_start_thread ();
744
745 FD_ZERO(&rfd);
746 FD_SET(respipe [0], &rfd);
747
748 select (respipe [0] + 1, &rfd, 0, 0, 0);
222 } 749 }
223} 750}
224 751
225static void 752static int poll_cb ()
226end_thread (void)
227{ 753{
754 dSP;
755 int count = 0;
756 int maxreqs = max_poll_reqs;
757 int do_croak = 0;
758 struct timeval tv_start, tv_now;
228 aio_req req; 759 aio_req req;
229 New (0, req, 1, aio_cb);
230 req->type = REQ_QUIT;
231 760
232 send_req (req); 761 if (max_poll_time)
233} 762 gettimeofday (&tv_start, 0);
234 763
235static void * 764 block_sig ();
236aio_proc (void *thr_arg)
237{
238 aio_req req;
239 int type;
240 765
241 do 766 for (;;)
242 { 767 {
243 pthread_mutex_lock (&reqlock);
244
245 for (;;) 768 for (;;)
246 { 769 {
247 req = reqs; 770 maybe_start_thread ();
248 771
772 LOCK (reslock);
773 req = reqq_shift (&res_queue);
774
249 if (reqs) 775 if (req)
250 { 776 {
251 reqs = reqs->next; 777 --npending;
252 if (!reqs) reqe = 0; 778
779 if (!res_queue.size)
780 {
781 /* read any signals sent by the worker threads */
782 char buf [4];
783 while (read (respipe [0], buf, 4) == 4)
784 ;
785 }
253 } 786 }
787
788 UNLOCK (reslock);
789
790 if (!req)
791 break;
792
793 --nreqs;
794
795 if (req->type == REQ_GROUP && req->size)
796 {
797 req->int1 = 1; /* mark request as delayed */
798 continue;
799 }
800 else
801 {
802 if (!req_invoke (req))
803 {
804 req_free (req);
805 unblock_sig ();
806 croak (0);
807 }
808
809 count++;
810 }
811
812 req_free (req);
813
814 if (maxreqs && !--maxreqs)
815 break;
816
817 if (max_poll_time)
818 {
819 gettimeofday (&tv_now, 0);
820
821 if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
822 break;
823 }
824 }
825
826 if (nreqs <= max_outstanding)
827 break;
828
829 poll_wait ();
830
831 ++maxreqs;
832 }
833
834 unblock_sig ();
835 return count;
836}
837
838static void create_pipe ()
839{
840 if (pipe (respipe))
841 croak ("unable to initialize result pipe");
842
843 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
844 croak ("cannot set result pipe to nonblocking mode");
845
846 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
847 croak ("cannot set result pipe to nonblocking mode");
848}
849
850/*****************************************************************************/
851/* work around various missing functions */
852
853#if !HAVE_PREADWRITE
854# define pread aio_pread
855# define pwrite aio_pwrite
856
857/*
858 * make our pread/pwrite safe against themselves, but not against
859 * normal read/write by using a mutex. slows down execution a lot,
860 * but that's your problem, not mine.
861 */
862static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
863
864static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
865{
866 ssize_t res;
867 off_t ooffset;
868
869 LOCK (preadwritelock);
870 ooffset = lseek (fd, 0, SEEK_CUR);
871 lseek (fd, offset, SEEK_SET);
872 res = read (fd, buf, count);
873 lseek (fd, ooffset, SEEK_SET);
874 UNLOCK (preadwritelock);
875
876 return res;
877}
878
879static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
880{
881 ssize_t res;
882 off_t ooffset;
883
884 LOCK (preadwritelock);
885 ooffset = lseek (fd, 0, SEEK_CUR);
886 lseek (fd, offset, SEEK_SET);
887 res = write (fd, buf, count);
888 lseek (fd, offset, SEEK_SET);
889 UNLOCK (preadwritelock);
890
891 return res;
892}
893#endif
894
895#if !HAVE_FDATASYNC
896# define fdatasync fsync
897#endif
898
899#if !HAVE_READAHEAD
900# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
901
902static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
903{
904 dBUF;
905
906 while (count > 0)
907 {
908 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
909
910 pread (fd, aio_buf, len, offset);
911 offset += len;
912 count -= len;
913 }
914
915 errno = 0;
916}
917
918#endif
919
920#if !HAVE_READDIR_R
921# define readdir_r aio_readdir_r
922
923static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
924
925static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
926{
927 struct dirent *e;
928 int errorno;
929
930 LOCK (readdirlock);
931
932 e = readdir (dirp);
933 errorno = errno;
934
935 if (e)
936 {
937 *res = ent;
938 strcpy (ent->d_name, e->d_name);
939 }
940 else
941 *res = 0;
942
943 UNLOCK (readdirlock);
944
945 errno = errorno;
946 return e ? 0 : -1;
947}
948#endif
949
950/* sendfile always needs emulation */
951static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
952{
953 ssize_t res;
954
955 if (!count)
956 return 0;
957
958#if HAVE_SENDFILE
959# if __linux
960 res = sendfile (ofd, ifd, &offset, count);
961
962# elif __freebsd
963 /*
964 * Of course, the freebsd sendfile is a dire hack with no thoughts
965 * wasted on making it similar to other I/O functions.
966 */
967 {
968 off_t sbytes;
969 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
970
971 if (res < 0 && sbytes)
972 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
973 res = sbytes;
974 }
975
976# elif __hpux
977 res = sendfile (ofd, ifd, offset, count, 0, 0);
978
979# elif __solaris
980 {
981 struct sendfilevec vec;
982 size_t sbytes;
983
984 vec.sfv_fd = ifd;
985 vec.sfv_flag = 0;
986 vec.sfv_off = offset;
987 vec.sfv_len = count;
988
989 res = sendfilev (ofd, &vec, 1, &sbytes);
990
991 if (res < 0 && sbytes)
992 res = sbytes;
993 }
994
995# endif
996#else
997 res = -1;
998 errno = ENOSYS;
999#endif
1000
1001 if (res < 0
1002 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
1003#if __solaris
1004 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
1005#endif
1006 )
1007 )
1008 {
1009 /* emulate sendfile. this is a major pain in the ass */
1010 dBUF;
1011
1012 res = 0;
1013
1014 while (count)
1015 {
1016 ssize_t cnt;
1017
1018 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
1019
1020 if (cnt <= 0)
1021 {
1022 if (cnt && !res) res = -1;
1023 break;
1024 }
1025
1026 cnt = write (ofd, aio_buf, cnt);
1027
1028 if (cnt <= 0)
1029 {
1030 if (cnt && !res) res = -1;
1031 break;
1032 }
1033
1034 offset += cnt;
1035 res += cnt;
1036 count -= cnt;
1037 }
1038 }
1039
1040 return res;
1041}
1042
1043/* read a full directory */
1044static void scandir_ (aio_req req, worker *self)
1045{
1046 DIR *dirp;
1047 union
1048 {
1049 struct dirent d;
1050 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
1051 } *u;
1052 struct dirent *entp;
1053 char *name, *names;
1054 int memlen = 4096;
1055 int memofs = 0;
1056 int res = 0;
1057 int errorno;
1058
1059 LOCK (wrklock);
1060 self->dirp = dirp = opendir (req->ptr1);
1061 self->dbuf = u = malloc (sizeof (*u));
1062 req->flags |= FLAG_PTR2_FREE;
1063 req->ptr2 = names = malloc (memlen);
1064 UNLOCK (wrklock);
1065
1066 if (dirp && u && names)
1067 for (;;)
1068 {
1069 errno = 0;
1070 readdir_r (dirp, &u->d, &entp);
1071
1072 if (!entp)
1073 break;
1074
1075 name = entp->d_name;
1076
1077 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1078 {
1079 int len = strlen (name) + 1;
1080
1081 res++;
1082
1083 while (memofs + len > memlen)
1084 {
1085 memlen *= 2;
1086 LOCK (wrklock);
1087 req->ptr2 = names = realloc (names, memlen);
1088 UNLOCK (wrklock);
1089
1090 if (!names)
1091 break;
1092 }
1093
1094 memcpy (names + memofs, name, len);
1095 memofs += len;
1096 }
1097 }
1098
1099 if (errno)
1100 res = -1;
1101
1102 req->result = res;
1103}
1104
1105/*****************************************************************************/
1106
1107static void *aio_proc (void *thr_arg)
1108{
1109 aio_req req;
1110 struct timespec ts;
1111 worker *self = (worker *)thr_arg;
1112
1113 /* try to distribute timeouts somewhat evenly */
1114 ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1115 * (1000000000UL / 1024UL);
1116
1117 for (;;)
1118 {
1119 ts.tv_sec = time (0) + IDLE_TIMEOUT;
1120
1121 LOCK (reqlock);
1122
1123 for (;;)
1124 {
1125 self->req = req = reqq_shift (&req_queue);
254 1126
255 if (req) 1127 if (req)
256 break; 1128 break;
257 1129
1130 ++idle;
1131
1132 if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1133 == ETIMEDOUT)
1134 {
1135 if (idle > max_idle)
1136 {
1137 --idle;
1138 UNLOCK (reqlock);
1139 LOCK (wrklock);
1140 --started;
1141 UNLOCK (wrklock);
1142 goto quit;
1143 }
1144
1145 /* we are allowed to idle, so do so without any timeout */
258 pthread_cond_wait (&reqwait, &reqlock); 1146 pthread_cond_wait (&reqwait, &reqlock);
1147 ts.tv_sec = time (0) + IDLE_TIMEOUT;
1148 }
1149
1150 --idle;
259 } 1151 }
260 1152
261 pthread_mutex_unlock (&reqlock); 1153 --nready;
1154
1155 UNLOCK (reqlock);
262 1156
263 errno = 0; /* strictly unnecessary */ 1157 errno = 0; /* strictly unnecessary */
264 1158
265 type = req->type; 1159 if (!(req->flags & FLAG_CANCELLED))
266
267 switch (type) 1160 switch (req->type)
1161 {
1162 case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1163 case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1164
1165 case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1166 case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1167
1168 case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1169 case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1170 case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1171
1172 case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1173 case REQ_CLOSE: req->result = close (req->int1); break;
1174 case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1175 case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1176 case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1177 case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1178 case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1179 case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1180 case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1181
1182 case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1183 case REQ_FSYNC: req->result = fsync (req->int1); break;
1184 case REQ_READDIR: scandir_ (req, self); break;
1185
1186 case REQ_BUSY:
1187 {
1188 struct timeval tv;
1189
1190 tv.tv_sec = req->int1;
1191 tv.tv_usec = req->int2;
1192
1193 req->result = select (0, 0, 0, 0, &tv);
1194 }
1195
1196 case REQ_GROUP:
1197 case REQ_NOP:
1198 break;
1199
1200 case REQ_QUIT:
1201 goto quit;
1202
1203 default:
1204 req->result = ENOSYS;
1205 break;
1206 }
1207
1208 req->errorno = errno;
1209
1210 LOCK (reslock);
1211
1212 ++npending;
1213
1214 if (!reqq_push (&res_queue, req))
268 { 1215 {
269 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
270 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
271#if SYS_readahead
272 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
273#else
274 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
275#endif
276
277 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
278 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
279 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
280
281 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
282 case REQ_CLOSE: req->result = close (req->fd); break;
283 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
284
285 case REQ_FSYNC: req->result = fsync (req->fd); break;
286 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
287
288 case REQ_QUIT:
289 break;
290
291 default:
292 req->result = ENOSYS;
293 break;
294 }
295
296 req->errorno = errno;
297
298 pthread_mutex_lock (&reslock);
299
300 req->next = 0;
301
302 if (rese)
303 {
304 rese->next = req;
305 rese = req;
306 }
307 else
308 {
309 rese = ress = req;
310
311 /* write a dummy byte to the pipe so fh becomes ready */ 1216 /* write a dummy byte to the pipe so fh becomes ready */
312 write (respipe [1], &respipe, 1); 1217 write (respipe [1], &respipe, 1);
1218
1219 /* optionally signal the main thread asynchronously */
1220 if (main_sig)
1221 pthread_kill (main_tid, main_sig);
313 } 1222 }
314 1223
315 pthread_mutex_unlock (&reslock); 1224 self->req = 0;
1225 worker_clear (self);
1226
1227 UNLOCK (reslock);
316 } 1228 }
317 while (type != REQ_QUIT); 1229
1230quit:
1231 LOCK (wrklock);
1232 worker_free (self);
1233 UNLOCK (wrklock);
318 1234
319 return 0; 1235 return 0;
320} 1236}
321 1237
1238/*****************************************************************************/
1239
1240static void atfork_prepare (void)
1241{
1242 LOCK (wrklock);
1243 LOCK (reqlock);
1244 LOCK (reslock);
1245#if !HAVE_PREADWRITE
1246 LOCK (preadwritelock);
1247#endif
1248#if !HAVE_READDIR_R
1249 LOCK (readdirlock);
1250#endif
1251}
1252
1253static void atfork_parent (void)
1254{
1255#if !HAVE_READDIR_R
1256 UNLOCK (readdirlock);
1257#endif
1258#if !HAVE_PREADWRITE
1259 UNLOCK (preadwritelock);
1260#endif
1261 UNLOCK (reslock);
1262 UNLOCK (reqlock);
1263 UNLOCK (wrklock);
1264}
1265
1266static void atfork_child (void)
1267{
1268 aio_req prv;
1269
1270 while (prv = reqq_shift (&req_queue))
1271 req_free (prv);
1272
1273 while (prv = reqq_shift (&res_queue))
1274 req_free (prv);
1275
1276 while (wrk_first.next != &wrk_first)
1277 {
1278 worker *wrk = wrk_first.next;
1279
1280 if (wrk->req)
1281 req_free (wrk->req);
1282
1283 worker_clear (wrk);
1284 worker_free (wrk);
1285 }
1286
1287 started = 0;
1288 idle = 0;
1289 nreqs = 0;
1290 nready = 0;
1291 npending = 0;
1292
1293 close (respipe [0]);
1294 close (respipe [1]);
1295 create_pipe ();
1296
1297 atfork_parent ();
1298}
1299
1300#define dREQ \
1301 aio_req req; \
1302 int req_pri = next_pri; \
1303 next_pri = DEFAULT_PRI + PRI_BIAS; \
1304 \
1305 if (SvOK (callback) && !SvROK (callback)) \
1306 croak ("callback must be undef or of reference type"); \
1307 \
1308 Newz (0, req, 1, aio_cb); \
1309 if (!req) \
1310 croak ("out of memory during aio_req allocation"); \
1311 \
1312 req->callback = newSVsv (callback); \
1313 req->pri = req_pri
1314
1315#define REQ_SEND \
1316 req_send (req); \
1317 \
1318 if (GIMME_V != G_VOID) \
1319 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1320
322MODULE = IO::AIO PACKAGE = IO::AIO 1321MODULE = IO::AIO PACKAGE = IO::AIO
323 1322
324PROTOTYPES: ENABLE 1323PROTOTYPES: ENABLE
325 1324
326BOOT: 1325BOOT:
327{ 1326{
328 if (pipe (respipe)) 1327 HV *stash = gv_stashpv ("IO::AIO", 1);
329 croak ("unable to initialize result pipe");
330 1328
331 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1329 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
332 croak ("cannot set result pipe to nonblocking mode"); 1330 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1331 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1332 newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1333 newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1334 newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1335 newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
333 1336
334 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 1337 create_pipe ();
335 croak ("cannot set result pipe to nonblocking mode"); 1338 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
336} 1339}
337 1340
338void 1341void
339min_parallel(nthreads) 1342max_poll_reqs (int nreqs)
340 int nthreads
341 PROTOTYPE: $ 1343 PROTOTYPE: $
342 CODE: 1344 CODE:
343 while (nthreads > started) 1345 max_poll_reqs = nreqs;
344 start_thread ();
345 1346
346void 1347void
347max_parallel(nthreads) 1348max_poll_time (double nseconds)
348 int nthreads
349 PROTOTYPE: $ 1349 PROTOTYPE: $
350 CODE: 1350 CODE:
351{ 1351 max_poll_time = nseconds * AIO_TICKS;
352 int cur = started;
353 while (cur > nthreads)
354 {
355 end_thread ();
356 cur--;
357 }
358 1352
359 while (started > nthreads) 1353void
360 { 1354min_parallel (int nthreads)
361 poll_wait (); 1355 PROTOTYPE: $
362 poll_cb (); 1356
363 } 1357void
364} 1358max_parallel (int nthreads)
1359 PROTOTYPE: $
1360
1361void
1362max_idle (int nthreads)
1363 PROTOTYPE: $
1364 CODE:
1365 set_max_idle (nthreads);
365 1366
366int 1367int
367max_outstanding(nreqs) 1368max_outstanding (int maxreqs)
368 int nreqs 1369 PROTOTYPE: $
369 PROTOTYPE: $
370 CODE: 1370 CODE:
371 RETVAL = max_outstanding; 1371 RETVAL = max_outstanding;
372 max_outstanding = nreqs; 1372 max_outstanding = maxreqs;
1373 OUTPUT:
1374 RETVAL
373 1375
374void 1376void
375aio_open(pathname,flags,mode,callback=&PL_sv_undef) 1377aio_open (pathname,flags,mode,callback=&PL_sv_undef)
376 SV * pathname 1378 SV8 * pathname
377 int flags 1379 int flags
378 int mode 1380 int mode
379 SV * callback 1381 SV * callback
380 PROTOTYPE: $$$;$ 1382 PROTOTYPE: $$$;$
381 CODE: 1383 PPCODE:
382{ 1384{
383 aio_req req; 1385 dREQ;
384
385 Newz (0, req, 1, aio_cb);
386
387 if (!req)
388 croak ("out of memory during aio_req allocation");
389 1386
390 req->type = REQ_OPEN; 1387 req->type = REQ_OPEN;
391 req->data = newSVsv (pathname); 1388 req->sv1 = newSVsv (pathname);
392 req->dataptr = SvPV_nolen (req->data); 1389 req->ptr1 = SvPVbyte_nolen (req->sv1);
393 req->fd = flags; 1390 req->int1 = flags;
394 req->mode = mode; 1391 req->mode = mode;
395 req->callback = SvREFCNT_inc (callback);
396 1392
397 send_req (req); 1393 REQ_SEND;
398} 1394}
399 1395
400void 1396void
401aio_close(fh,callback=&PL_sv_undef) 1397aio_close (fh,callback=&PL_sv_undef)
402 SV * fh 1398 SV * fh
403 SV * callback 1399 SV * callback
404 PROTOTYPE: $;$ 1400 PROTOTYPE: $;$
405 ALIAS: 1401 ALIAS:
406 aio_close = REQ_CLOSE 1402 aio_close = REQ_CLOSE
407 aio_fsync = REQ_FSYNC 1403 aio_fsync = REQ_FSYNC
408 aio_fdatasync = REQ_FDATASYNC 1404 aio_fdatasync = REQ_FDATASYNC
409 CODE: 1405 PPCODE:
410{ 1406{
411 aio_req req; 1407 dREQ;
412
413 Newz (0, req, 1, aio_cb);
414
415 if (!req)
416 croak ("out of memory during aio_req allocation");
417 1408
418 req->type = ix; 1409 req->type = ix;
419 req->fh = newSVsv (fh); 1410 req->fh = newSVsv (fh);
420 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1411 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
421 req->callback = SvREFCNT_inc (callback);
422 1412
423 send_req (req); 1413 REQ_SEND (req);
424} 1414}
425 1415
426void 1416void
427aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 1417aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
428 SV * fh 1418 SV * fh
429 UV offset 1419 UV offset
430 IV length 1420 UV length
431 SV * data 1421 SV8 * data
432 IV dataoffset 1422 UV dataoffset
433 SV * callback 1423 SV * callback
434 ALIAS: 1424 ALIAS:
435 aio_read = REQ_READ 1425 aio_read = REQ_READ
436 aio_write = REQ_WRITE 1426 aio_write = REQ_WRITE
437 PROTOTYPE: $$$$$;$ 1427 PROTOTYPE: $$$$$;$
438 CODE: 1428 PPCODE:
439{ 1429{
440 aio_req req;
441 STRLEN svlen; 1430 STRLEN svlen;
442 char *svptr = SvPV (data, svlen); 1431 char *svptr = SvPVbyte (data, svlen);
443 1432
444 SvUPGRADE (data, SVt_PV); 1433 SvUPGRADE (data, SVt_PV);
445 SvPOK_on (data); 1434 SvPOK_on (data);
446 1435
447 if (dataoffset < 0) 1436 if (dataoffset < 0)
… …
457 length = svlen - dataoffset; 1446 length = svlen - dataoffset;
458 } 1447 }
459 else 1448 else
460 { 1449 {
461 /* read: grow scalar as necessary */ 1450 /* read: grow scalar as necessary */
462 svptr = SvGROW (data, length + dataoffset); 1451 svptr = SvGROW (data, length + dataoffset + 1);
463 } 1452 }
464 1453
465 if (length < 0) 1454 if (length < 0)
466 croak ("length must not be negative"); 1455 croak ("length must not be negative");
467 1456
468 Newz (0, req, 1, aio_cb); 1457 {
1458 dREQ;
469 1459
470 if (!req)
471 croak ("out of memory during aio_req allocation");
472
473 req->type = ix; 1460 req->type = ix;
474 req->fh = newSVsv (fh); 1461 req->fh = newSVsv (fh);
475 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) 1462 req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
476 : IoOFP (sv_2io (fh))); 1463 : IoOFP (sv_2io (fh)));
477 req->offset = offset; 1464 req->offs = offset;
478 req->length = length; 1465 req->size = length;
479 req->data = SvREFCNT_inc (data); 1466 req->sv1 = SvREFCNT_inc (data);
480 req->dataptr = (char *)svptr + dataoffset; 1467 req->ptr1 = (char *)svptr + dataoffset;
481 req->callback = SvREFCNT_inc (callback); 1468 req->stroffset = dataoffset;
482 1469
483 send_req (req); 1470 if (!SvREADONLY (data))
484} 1471 {
1472 SvREADONLY_on (data);
1473 req->flags |= FLAG_SV1_RO_OFF;
1474 }
485 1475
1476 REQ_SEND;
1477 }
1478}
1479
486void 1480void
1481aio_readlink (path,callback=&PL_sv_undef)
1482 SV8 * path
1483 SV * callback
1484 PROTOTYPE: $$;$
1485 PPCODE:
1486{
1487 SV *data;
1488 dREQ;
1489
1490 data = newSV (NAME_MAX);
1491 SvPOK_on (data);
1492
1493 req->type = REQ_READLINK;
1494 req->fh = newSVsv (path);
1495 req->ptr2 = SvPVbyte_nolen (req->fh);
1496 req->sv1 = data;
1497 req->ptr1 = SvPVbyte_nolen (data);
1498
1499 REQ_SEND;
1500}
1501
1502void
1503aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1504 SV * out_fh
1505 SV * in_fh
1506 UV in_offset
1507 UV length
1508 SV * callback
1509 PROTOTYPE: $$$$;$
1510 PPCODE:
1511{
1512 dREQ;
1513
1514 req->type = REQ_SENDFILE;
1515 req->fh = newSVsv (out_fh);
1516 req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1517 req->sv2 = newSVsv (in_fh);
1518 req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1519 req->offs = in_offset;
1520 req->size = length;
1521
1522 REQ_SEND;
1523}
1524
1525void
487aio_readahead(fh,offset,length,callback=&PL_sv_undef) 1526aio_readahead (fh,offset,length,callback=&PL_sv_undef)
488 SV * fh 1527 SV * fh
489 UV offset 1528 UV offset
490 IV length 1529 IV length
491 SV * callback 1530 SV * callback
492 PROTOTYPE: $$$;$ 1531 PROTOTYPE: $$$;$
493 CODE: 1532 PPCODE:
494{ 1533{
495 aio_req req; 1534 dREQ;
496
497 if (length < 0)
498 croak ("length must not be negative");
499
500 Newz (0, req, 1, aio_cb);
501
502 if (!req)
503 croak ("out of memory during aio_req allocation");
504 1535
505 req->type = REQ_READAHEAD; 1536 req->type = REQ_READAHEAD;
506 req->fh = newSVsv (fh); 1537 req->fh = newSVsv (fh);
507 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1538 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
508 req->offset = offset; 1539 req->offs = offset;
509 req->length = length; 1540 req->size = length;
510 req->callback = SvREFCNT_inc (callback);
511 1541
512 send_req (req); 1542 REQ_SEND;
513} 1543}
514 1544
515void 1545void
516aio_stat(fh_or_path,callback=&PL_sv_undef) 1546aio_stat (fh_or_path,callback=&PL_sv_undef)
517 SV * fh_or_path 1547 SV8 * fh_or_path
518 SV * callback 1548 SV * callback
519 ALIAS: 1549 ALIAS:
520 aio_stat = REQ_STAT 1550 aio_stat = REQ_STAT
521 aio_lstat = REQ_LSTAT 1551 aio_lstat = REQ_LSTAT
522 CODE: 1552 PPCODE:
523{ 1553{
524 aio_req req; 1554 dREQ;
525 1555
526 Newz (0, req, 1, aio_cb); 1556 req->ptr2 = malloc (sizeof (Stat_t));
527
528 if (!req) 1557 if (!req->ptr2)
529 croak ("out of memory during aio_req allocation"); 1558 {
530 1559 req_free (req);
531 New (0, req->statdata, 1, Stat_t);
532
533 if (!req->statdata)
534 croak ("out of memory during aio_req->statdata allocation"); 1560 croak ("out of memory during aio_stat statdata allocation");
1561 }
1562
1563 req->flags |= FLAG_PTR2_FREE;
535 1564
536 if (SvPOK (fh_or_path)) 1565 if (SvPOK (fh_or_path))
537 { 1566 {
538 req->type = ix; 1567 req->type = ix;
539 req->data = newSVsv (fh_or_path); 1568 req->sv1 = newSVsv (fh_or_path);
540 req->dataptr = SvPV_nolen (req->data); 1569 req->ptr1 = SvPVbyte_nolen (req->sv1);
541 } 1570 }
542 else 1571 else
543 { 1572 {
544 req->type = REQ_FSTAT; 1573 req->type = REQ_FSTAT;
545 req->fh = newSVsv (fh_or_path); 1574 req->fh = newSVsv (fh_or_path);
546 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1575 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
547 } 1576 }
548 1577
549 req->callback = SvREFCNT_inc (callback); 1578 REQ_SEND;
550
551 send_req (req);
552} 1579}
553 1580
554void 1581void
555aio_unlink(pathname,callback=&PL_sv_undef) 1582aio_unlink (pathname,callback=&PL_sv_undef)
556 SV * pathname 1583 SV8 * pathname
557 SV * callback 1584 SV * callback
1585 ALIAS:
1586 aio_unlink = REQ_UNLINK
1587 aio_rmdir = REQ_RMDIR
1588 aio_readdir = REQ_READDIR
1589 PPCODE:
1590{
1591 dREQ;
1592
1593 req->type = ix;
1594 req->sv1 = newSVsv (pathname);
1595 req->ptr1 = SvPVbyte_nolen (req->sv1);
1596
1597 REQ_SEND;
1598}
1599
1600void
1601aio_link (oldpath,newpath,callback=&PL_sv_undef)
1602 SV8 * oldpath
1603 SV8 * newpath
1604 SV * callback
1605 ALIAS:
1606 aio_link = REQ_LINK
1607 aio_symlink = REQ_SYMLINK
1608 aio_rename = REQ_RENAME
1609 PPCODE:
1610{
1611 dREQ;
1612
1613 req->type = ix;
1614 req->fh = newSVsv (oldpath);
1615 req->ptr2 = SvPVbyte_nolen (req->fh);
1616 req->sv1 = newSVsv (newpath);
1617 req->ptr1 = SvPVbyte_nolen (req->sv1);
1618
1619 REQ_SEND;
1620}
1621
1622void
1623aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1624 SV8 * pathname
1625 SV * callback
1626 UV mode
1627 UV dev
1628 PPCODE:
1629{
1630 dREQ;
1631
1632 req->type = REQ_MKNOD;
1633 req->sv1 = newSVsv (pathname);
1634 req->ptr1 = SvPVbyte_nolen (req->sv1);
1635 req->mode = (mode_t)mode;
1636 req->offs = dev;
1637
1638 REQ_SEND;
1639}
1640
1641void
1642aio_busy (delay,callback=&PL_sv_undef)
1643 double delay
1644 SV * callback
1645 PPCODE:
1646{
1647 dREQ;
1648
1649 req->type = REQ_BUSY;
1650 req->int1 = delay < 0. ? 0 : delay;
1651 req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1652
1653 REQ_SEND;
1654}
1655
1656void
1657aio_group (callback=&PL_sv_undef)
1658 SV * callback
1659 PROTOTYPE: ;$
1660 PPCODE:
1661{
1662 dREQ;
1663
1664 req->type = REQ_GROUP;
1665
1666 req_send (req);
1667 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1668}
1669
1670void
1671aio_nop (callback=&PL_sv_undef)
1672 SV * callback
1673 PPCODE:
1674{
1675 dREQ;
1676
1677 req->type = REQ_NOP;
1678
1679 REQ_SEND;
1680}
1681
1682int
1683aioreq_pri (int pri = 0)
1684 PROTOTYPE: ;$
558 CODE: 1685 CODE:
559{ 1686 RETVAL = next_pri - PRI_BIAS;
560 aio_req req; 1687 if (items > 0)
561 1688 {
562 Newz (0, req, 1, aio_cb); 1689 if (pri < PRI_MIN) pri = PRI_MIN;
563 1690 if (pri > PRI_MAX) pri = PRI_MAX;
564 if (!req) 1691 next_pri = pri + PRI_BIAS;
565 croak ("out of memory during aio_req allocation"); 1692 }
566 1693 OUTPUT:
567 req->type = REQ_UNLINK; 1694 RETVAL
568 req->data = newSVsv (pathname);
569 req->dataptr = SvPV_nolen (req->data);
570 req->callback = SvREFCNT_inc (callback);
571
572 send_req (req);
573}
574 1695
575void 1696void
1697aioreq_nice (int nice = 0)
1698 CODE:
1699 nice = next_pri - nice;
1700 if (nice < PRI_MIN) nice = PRI_MIN;
1701 if (nice > PRI_MAX) nice = PRI_MAX;
1702 next_pri = nice + PRI_BIAS;
1703
1704void
576flush() 1705flush ()
577 PROTOTYPE: 1706 PROTOTYPE:
578 CODE: 1707 CODE:
579 while (nreqs) 1708 while (nreqs)
580 { 1709 {
581 poll_wait (); 1710 poll_wait ();
582 poll_cb (); 1711 poll_cb ();
583 } 1712 }
584 1713
585void 1714int
586poll() 1715poll()
587 PROTOTYPE: 1716 PROTOTYPE:
588 CODE: 1717 CODE:
589 if (nreqs)
590 {
591 poll_wait (); 1718 poll_wait ();
592 poll_cb (); 1719 RETVAL = poll_cb ();
593 } 1720 OUTPUT:
1721 RETVAL
594 1722
595int 1723int
596poll_fileno() 1724poll_fileno()
597 PROTOTYPE: 1725 PROTOTYPE:
598 CODE: 1726 CODE:
… …
610 1738
611void 1739void
612poll_wait() 1740poll_wait()
613 PROTOTYPE: 1741 PROTOTYPE:
614 CODE: 1742 CODE:
615 if (nreqs)
616 poll_wait (); 1743 poll_wait ();
1744
1745void
1746setsig (int signum = SIGIO)
1747 PROTOTYPE: ;$
1748 CODE:
1749{
1750 if (block_sig_level)
1751 croak ("cannot call IO::AIO::setsig from within aio_block/callback");
1752
1753 LOCK (reslock);
1754 main_tid = pthread_self ();
1755 main_sig = signum;
1756 UNLOCK (reslock);
1757
1758 if (main_sig && npending)
1759 pthread_kill (main_tid, main_sig);
1760}
1761
1762void
1763aio_block (SV *cb)
1764 PROTOTYPE: &
1765 PPCODE:
1766{
1767 int count;
1768
1769 block_sig ();
1770 PUSHMARK (SP);
1771 PUTBACK;
1772 count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
1773 SPAGAIN;
1774 unblock_sig ();
1775
1776 if (SvTRUE (ERRSV))
1777 croak (0);
1778
1779 XSRETURN (count);
1780}
617 1781
618int 1782int
619nreqs() 1783nreqs()
620 PROTOTYPE: 1784 PROTOTYPE:
621 CODE: 1785 CODE:
622 RETVAL = nreqs; 1786 RETVAL = nreqs;
623 OUTPUT: 1787 OUTPUT:
624 RETVAL 1788 RETVAL
625 1789
1790int
1791nready()
1792 PROTOTYPE:
1793 CODE:
1794 RETVAL = get_nready ();
1795 OUTPUT:
1796 RETVAL
1797
1798int
1799npending()
1800 PROTOTYPE:
1801 CODE:
1802 RETVAL = get_npending ();
1803 OUTPUT:
1804 RETVAL
1805
1806int
1807nthreads()
1808 PROTOTYPE:
1809 CODE:
1810 if (WORDACCESS_UNSAFE) LOCK (wrklock);
1811 RETVAL = started;
1812 if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1813 OUTPUT:
1814 RETVAL
1815
1816PROTOTYPES: DISABLE
1817
1818MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1819
1820void
1821cancel (aio_req_ornot req)
1822 CODE:
1823 req_cancel (req);
1824
1825void
1826cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1827 CODE:
1828 SvREFCNT_dec (req->callback);
1829 req->callback = newSVsv (callback);
1830
1831MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1832
1833void
1834add (aio_req grp, ...)
1835 PPCODE:
1836{
1837 int i;
1838 aio_req req;
1839
1840 if (main_sig && !block_sig_level)
1841 croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
1842
1843 if (grp->int1 == 2)
1844 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1845
1846 for (i = 1; i < items; ++i )
1847 {
1848 if (GIMME_V != G_VOID)
1849 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1850
1851 req = SvAIO_REQ (ST (i));
1852
1853 if (req)
1854 {
1855 ++grp->size;
1856 req->grp = grp;
1857
1858 req->grp_prev = 0;
1859 req->grp_next = grp->grp_first;
1860
1861 if (grp->grp_first)
1862 grp->grp_first->grp_prev = req;
1863
1864 grp->grp_first = req;
1865 }
1866 }
1867}
1868
1869void
1870cancel_subs (aio_req_ornot req)
1871 CODE:
1872 req_cancel_subs (req);
1873
1874void
1875result (aio_req grp, ...)
1876 CODE:
1877{
1878 int i;
1879 AV *av;
1880
1881 grp->errorno = errno;
1882
1883 av = newAV ();
1884
1885 for (i = 1; i < items; ++i )
1886 av_push (av, newSVsv (ST (i)));
1887
1888 SvREFCNT_dec (grp->sv1);
1889 grp->sv1 = (SV *)av;
1890}
1891
1892void
1893errno (aio_req grp, int errorno = errno)
1894 CODE:
1895 grp->errorno = errorno;
1896
1897void
1898limit (aio_req grp, int limit)
1899 CODE:
1900 grp->int2 = limit;
1901 aio_grp_feed (grp);
1902
1903void
1904feed (aio_req grp, SV *callback=&PL_sv_undef)
1905 CODE:
1906{
1907 SvREFCNT_dec (grp->sv2);
1908 grp->sv2 = newSVsv (callback);
1909
1910 if (grp->int2 <= 0)
1911 grp->int2 = 2;
1912
1913 aio_grp_feed (grp);
1914}
1915

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