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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.15 by root, Sat Jul 23 18:19:56 2005 UTC vs.
Revision 1.86 by root, Mon Oct 30 23:30:00 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
1#include "EXTERN.h" 13#include "EXTERN.h"
2#include "perl.h" 14#include "perl.h"
3#include "XSUB.h" 15#include "XSUB.h"
4 16
17#include "autoconf/config.h"
18
19#include <pthread.h>
20
21#include <stddef.h>
22#include <errno.h>
23#include <sys/time.h>
24#include <sys/select.h>
5#include <sys/types.h> 25#include <sys/types.h>
6#include <sys/stat.h> 26#include <sys/stat.h>
7 27#include <limits.h>
8#include <unistd.h> 28#include <unistd.h>
9#include <fcntl.h> 29#include <fcntl.h>
10#include <signal.h> 30#include <signal.h>
11#include <sched.h> 31#include <sched.h>
32
33#if HAVE_SENDFILE
12#if __linux 34# if __linux
35# include <sys/sendfile.h>
36# elif __freebsd
13#include <sys/syscall.h> 37# include <sys/socket.h>
38# include <sys/uio.h>
39# elif __hpux
40# include <sys/socket.h>
41# elif __solaris /* not yet */
42# include <sys/sendfile.h>
43# else
44# error sendfile support requested but not available
45# endif
14#endif 46#endif
15 47
16#include <pthread.h> 48/* number of seconds after which idle threads exit */
49#define IDLE_TIMEOUT 10
17 50
18typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 51/* used for struct dirent, AIX doesn't provide it */
19typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 52#ifndef NAME_MAX
20typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 53# define NAME_MAX 4096
54#endif
55
56#ifndef PTHREAD_STACK_MIN
57/* care for broken platforms, e.g. windows */
58# define PTHREAD_STACK_MIN 16384
59#endif
21 60
22#if __ia64 61#if __ia64
23# define STACKSIZE 65536 62# define STACKSIZE 65536
63#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
64# define STACKSIZE PTHREAD_STACK_MIN
24#else 65#else
25# define STACKSIZE 4096 66# define STACKSIZE 16384
26#endif 67#endif
68
69/* wether word reads are potentially non-atomic.
70 * this is conservatice, likely most arches this runs
71 * on have atomic word read/writes.
72 */
73#ifndef WORDACCESS_UNSAFE
74# if __i386 || __x86_64
75# define WORDACCESS_UNSAFE 0
76# else
77# define WORDACCESS_UNSAFE 1
78# endif
79#endif
80
81/* buffer size for various temporary buffers */
82#define AIO_BUFSIZE 65536
83
84#define dBUF \
85 char *aio_buf; \
86 LOCK (wrklock); \
87 self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
88 UNLOCK (wrklock); \
89 if (!aio_buf) \
90 return -1;
27 91
28enum { 92enum {
29 REQ_QUIT, 93 REQ_QUIT,
30 REQ_OPEN, REQ_CLOSE, 94 REQ_OPEN, REQ_CLOSE,
31 REQ_READ, REQ_WRITE, REQ_READAHEAD, 95 REQ_READ, REQ_WRITE, REQ_READAHEAD,
96 REQ_SENDFILE,
32 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 97 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
33 REQ_FSYNC, REQ_FDATASYNC, 98 REQ_FSYNC, REQ_FDATASYNC,
99 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
100 REQ_MKNOD, REQ_READDIR,
101 REQ_LINK, REQ_SYMLINK, REQ_READLINK,
102 REQ_GROUP, REQ_NOP,
103 REQ_BUSY,
34}; 104};
35 105
106#define AIO_REQ_KLASS "IO::AIO::REQ"
107#define AIO_GRP_KLASS "IO::AIO::GRP"
108
36typedef struct aio_cb { 109typedef struct aio_cb
110{
37 struct aio_cb *volatile next; 111 struct aio_cb *volatile next;
38 112
113 SV *callback, *fh;
114 SV *sv1, *sv2;
115 void *ptr1, *ptr2;
116 Stat_t *statdata;
117 off_t offs;
118 size_t size;
119 ssize_t result;
120
121 STRLEN stroffset;
39 int type; 122 int type;
40 123 int int1, int2;
41 int fd; 124 int errorno;
42 off_t offset;
43 size_t length;
44 ssize_t result;
45 mode_t mode; /* open */ 125 mode_t mode; /* open */
46 int errorno;
47 SV *data, *callback, *fh;
48 void *dataptr;
49 STRLEN dataoffset;
50 126
51 Stat_t *statdata; 127 unsigned char flags;
128 unsigned char pri;
129
130 SV *self; /* the perl counterpart of this request, if any */
131 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
52} aio_cb; 132} aio_cb;
53 133
134enum {
135 FLAG_CANCELLED = 0x01,
136 FLAG_DATA_RO_OFF = 0x80, /* data was set readonly */
137};
138
54typedef aio_cb *aio_req; 139typedef aio_cb *aio_req;
140typedef aio_cb *aio_req_ornot;
55 141
56static int started; 142enum {
57static volatile int nreqs; 143 PRI_MIN = -4,
58static int max_outstanding = 1<<30; 144 PRI_MAX = 4,
145
146 DEFAULT_PRI = 0,
147 PRI_BIAS = -PRI_MIN,
148 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
149};
150
151#define AIO_TICKS ((1000000 + 1023) >> 10)
152
153static unsigned int max_poll_time = 0;
154static unsigned int max_poll_reqs = 0;
155
156/* calculcate time difference in ~1/AIO_TICKS of a second */
157static int tvdiff (struct timeval *tv1, struct timeval *tv2)
158{
159 return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
160 + ((tv2->tv_usec - tv1->tv_usec) >> 10);
161}
162
163static int next_pri = DEFAULT_PRI + PRI_BIAS;
164
165static unsigned int started, idle, wanted;
166
167#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
168# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
169#else
170# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
171#endif
172
173#define LOCK(mutex) pthread_mutex_lock (&(mutex))
174#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
175
176/* worker threads management */
177static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
178
179typedef struct worker {
180 /* locked by wrklock */
181 struct worker *prev, *next;
182
183 pthread_t tid;
184
185 /* locked by reslock, reqlock or wrklock */
186 aio_req req; /* currently processed request */
187 void *dbuf;
188 DIR *dirp;
189} worker;
190
191static worker wrk_first = { &wrk_first, &wrk_first, 0 };
192
193static void worker_clear (worker *wrk)
194{
195 if (wrk->dirp)
196 {
197 closedir (wrk->dirp);
198 wrk->dirp = 0;
199 }
200
201 if (wrk->dbuf)
202 {
203 free (wrk->dbuf);
204 wrk->dbuf = 0;
205 }
206}
207
208static void worker_free (worker *wrk)
209{
210 wrk->next->prev = wrk->prev;
211 wrk->prev->next = wrk->next;
212
213 free (wrk);
214}
215
216static volatile unsigned int nreqs, nready, npending;
217static volatile unsigned int max_idle = 4;
218static volatile unsigned int max_outstanding = 0xffffffff;
59static int respipe [2]; 219static int respipe [2];
60 220
61static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 221static pthread_mutex_t reslock = AIO_MUTEX_INIT;
62static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 222static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
63static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 223static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
64 224
65static volatile aio_req reqs, reqe; /* queue start, queue end */ 225#if WORDACCESS_UNSAFE
66static volatile aio_req ress, rese; /* queue start, queue end */
67 226
68static void 227static unsigned int get_nready ()
69poll_wait ()
70{ 228{
71 if (nreqs && !ress) 229 unsigned int retval;
72 {
73 fd_set rfd;
74 FD_ZERO(&rfd);
75 FD_SET(respipe [0], &rfd);
76 230
77 select (respipe [0] + 1, &rfd, 0, 0, 0); 231 LOCK (reqlock);
232 retval = nready;
233 UNLOCK (reqlock);
234
235 return retval;
236}
237
238static unsigned int get_npending ()
239{
240 unsigned int retval;
241
242 LOCK (reslock);
243 retval = npending;
244 UNLOCK (reslock);
245
246 return retval;
247}
248
249static unsigned int get_nthreads ()
250{
251 unsigned int retval;
252
253 LOCK (wrklock);
254 retval = started;
255 UNLOCK (wrklock);
256
257 return retval;
258}
259
260#else
261
262# define get_nready() nready
263# define get_npending() npending
264# define get_nthreads() started
265
266#endif
267
268/*
269 * a somewhat faster data structure might be nice, but
270 * with 8 priorities this actually needs <20 insns
271 * per shift, the most expensive operation.
272 */
273typedef struct {
274 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
275 int size;
276} reqq;
277
278static reqq req_queue;
279static reqq res_queue;
280
281int reqq_push (reqq *q, aio_req req)
282{
283 int pri = req->pri;
284 req->next = 0;
285
286 if (q->qe[pri])
78 } 287 {
79} 288 q->qe[pri]->next = req;
289 q->qe[pri] = req;
290 }
291 else
292 q->qe[pri] = q->qs[pri] = req;
80 293
81static int 294 return q->size++;
82poll_cb () 295}
296
297aio_req reqq_shift (reqq *q)
298{
299 int pri;
300
301 if (!q->size)
302 return 0;
303
304 --q->size;
305
306 for (pri = NUM_PRI; pri--; )
307 {
308 aio_req req = q->qs[pri];
309
310 if (req)
311 {
312 if (!(q->qs[pri] = req->next))
313 q->qe[pri] = 0;
314
315 return req;
316 }
317 }
318
319 abort ();
320}
321
322static int poll_cb ();
323static void req_invoke (aio_req req);
324static void req_free (aio_req req);
325static void req_cancel (aio_req req);
326
327/* must be called at most once */
328static SV *req_sv (aio_req req, const char *klass)
329{
330 if (!req->self)
331 {
332 req->self = (SV *)newHV ();
333 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
334 }
335
336 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
337}
338
339static aio_req SvAIO_REQ (SV *sv)
340{
341 MAGIC *mg;
342
343 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
344 croak ("object of class " AIO_REQ_KLASS " expected");
345
346 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
347
348 return mg ? (aio_req)mg->mg_ptr : 0;
349}
350
351static void aio_grp_feed (aio_req grp)
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
382static void aio_grp_dec (aio_req grp)
383{
384 --grp->size;
385
386 /* call feeder, if applicable */
387 aio_grp_feed (grp);
388
389 /* finish, if done */
390 if (!grp->size && grp->int1)
391 {
392 req_invoke (grp);
393 req_free (grp);
394 }
395}
396
397static void req_invoke (aio_req req)
83{ 398{
84 dSP; 399 dSP;
85 int count = 0;
86 aio_req req, prv;
87 400
88 pthread_mutex_lock (&reslock); 401 if (req->flags & FLAG_DATA_RO_OFF)
402 SvREADONLY_off (req->sv1);
89 403
404 if (req->statdata)
90 { 405 {
91 /* read any signals sent by the worker threads */ 406 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
92 char buf [32]; 407 PL_laststatval = req->result;
93 while (read (respipe [0], buf, 32) > 0) 408 PL_statcache = *(req->statdata);
94 ;
95 }
96
97 req = ress;
98 ress = rese = 0;
99
100 pthread_mutex_unlock (&reslock);
101
102 while (req)
103 { 409 }
104 nreqs--;
105 410
106 if (req->type == REQ_QUIT) 411 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
107 started--; 412 {
108 else 413 ENTER;
414 SAVETMPS;
415 PUSHMARK (SP);
416 EXTEND (SP, 1);
417
418 switch (req->type)
109 { 419 {
110 int errorno = errno; 420 case REQ_READDIR:
111 errno = req->errorno;
112
113 if (req->type == REQ_READ)
114 SvCUR_set (req->data, req->dataoffset
115 + req->result > 0 ? req->result : 0);
116
117 if (req->data)
118 SvREFCNT_dec (req->data);
119
120 if (req->fh)
121 SvREFCNT_dec (req->fh);
122
123 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
124 { 421 {
125 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 422 SV *rv = &PL_sv_undef;
126 PL_laststatval = req->result;
127 PL_statcache = *(req->statdata);
128 423
129 Safefree (req->statdata); 424 if (req->result >= 0)
425 {
426 int i;
427 char *buf = req->ptr2;
428 AV *av = newAV ();
429
430 av_extend (av, req->result - 1);
431
432 for (i = 0; i < req->result; ++i)
433 {
434 SV *sv = newSVpv (buf, 0);
435
436 av_store (av, i, sv);
437 buf += SvCUR (sv) + 1;
438 }
439
440 rv = sv_2mortal (newRV_noinc ((SV *)av));
441 }
442
443 PUSHs (rv);
130 } 444 }
445 break;
131 446
132 ENTER; 447 case REQ_OPEN:
133 PUSHMARK (SP);
134 XPUSHs (sv_2mortal (newSViv (req->result)));
135
136 if (req->type == REQ_OPEN)
137 { 448 {
138 /* convert fd to fh */ 449 /* convert fd to fh */
139 SV *fh; 450 SV *fh;
140 451
452 PUSHs (sv_2mortal (newSViv (req->result)));
141 PUTBACK; 453 PUTBACK;
142 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 454 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
143 SPAGAIN; 455 SPAGAIN;
144 456
145 fh = SvREFCNT_inc (POPs); 457 fh = SvREFCNT_inc (POPs);
146 458
147 PUSHMARK (SP); 459 PUSHMARK (SP);
148 XPUSHs (sv_2mortal (fh)); 460 XPUSHs (sv_2mortal (fh));
149 } 461 }
462 break;
150 463
151 if (SvOK (req->callback)) 464 case REQ_GROUP:
465 req->int1 = 2; /* mark group as finished */
466
467 if (req->sv1)
152 { 468 {
153 PUTBACK; 469 int i;
154 call_sv (req->callback, G_VOID | G_EVAL); 470 AV *av = (AV *)req->sv1;
155 SPAGAIN; 471
472 EXTEND (SP, AvFILL (av) + 1);
473 for (i = 0; i <= AvFILL (av); ++i)
474 PUSHs (*av_fetch (av, i, 0));
156 } 475 }
476 break;
157 477
158 LEAVE; 478 case REQ_NOP:
479 case REQ_BUSY:
480 break;
481
482 case REQ_READLINK:
483 if (req->result > 0)
159 484 {
160 if (req->callback) 485 SvCUR_set (req->sv1, req->result);
161 SvREFCNT_dec (req->callback); 486 *SvEND (req->sv1) = 0;
487 PUSHs (req->sv1);
488 }
489 break;
162 490
163 errno = errorno; 491 case REQ_READ:
164 count++; 492 SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
493 *SvEND (req->sv1) = 0;
494 /* fall through */
495 default:
496 PUSHs (sv_2mortal (newSViv (req->result)));
497 break;
165 } 498 }
166 499
167 prv = req; 500 errno = req->errorno;
168 req = req->next;
169 Safefree (prv);
170 501
171 /* TODO: croak on errors? */ 502 PUTBACK;
503 call_sv (req->callback, G_VOID | G_EVAL);
504 SPAGAIN;
505
506 FREETMPS;
507 LEAVE;
508 }
509
510 if (req->grp)
172 } 511 {
512 aio_req grp = req->grp;
173 513
174 return count; 514 /* unlink request */
515 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
516 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
517
518 if (grp->grp_first == req)
519 grp->grp_first = req->grp_next;
520
521 aio_grp_dec (grp);
522 }
523
524 if (SvTRUE (ERRSV))
525 {
526 req_free (req);
527 croak (0);
528 }
529}
530
531static void req_free (aio_req req)
532{
533 if (req->self)
534 {
535 sv_unmagic (req->self, PERL_MAGIC_ext);
536 SvREFCNT_dec (req->self);
537 }
538
539 SvREFCNT_dec (req->fh);
540 SvREFCNT_dec (req->sv1);
541 SvREFCNT_dec (req->sv2);
542 SvREFCNT_dec (req->callback);
543 Safefree (req->statdata);
544
545 if (req->type == REQ_READDIR)
546 free (req->ptr2);
547
548 Safefree (req);
549}
550
551static void req_cancel_subs (aio_req grp)
552{
553 aio_req sub;
554
555 if (grp->type != REQ_GROUP)
556 return;
557
558 SvREFCNT_dec (grp->sv2);
559 grp->sv2 = 0;
560
561 for (sub = grp->grp_first; sub; sub = sub->grp_next)
562 req_cancel (sub);
563}
564
565static void req_cancel (aio_req req)
566{
567 req->flags |= FLAG_CANCELLED;
568
569 req_cancel_subs (req);
175} 570}
176 571
177static void *aio_proc(void *arg); 572static void *aio_proc(void *arg);
178 573
179static void
180start_thread (void) 574static void start_thread (void)
181{ 575{
182 sigset_t fullsigset, oldsigset; 576 sigset_t fullsigset, oldsigset;
183 pthread_t tid;
184 pthread_attr_t attr; 577 pthread_attr_t attr;
578
579 worker *wrk = calloc (1, sizeof (worker));
580
581 if (!wrk)
582 croak ("unable to allocate worker thread data");
185 583
186 pthread_attr_init (&attr); 584 pthread_attr_init (&attr);
187 pthread_attr_setstacksize (&attr, STACKSIZE); 585 pthread_attr_setstacksize (&attr, STACKSIZE);
188 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 586 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
587#ifdef PTHREAD_SCOPE_PROCESS
588 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
589#endif
189 590
190 sigfillset (&fullsigset); 591 sigfillset (&fullsigset);
592
593 LOCK (wrklock);
191 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); 594 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
192 595
193 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 596 if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
597 {
598 wrk->prev = &wrk_first;
599 wrk->next = wrk_first.next;
600 wrk_first.next->prev = wrk;
601 wrk_first.next = wrk;
194 started++; 602 ++started;
603 }
604 else
605 free (wrk);
195 606
196 sigprocmask (SIG_SETMASK, &oldsigset, 0); 607 sigprocmask (SIG_SETMASK, &oldsigset, 0);
608 UNLOCK (wrklock);
197} 609}
198 610
199static void 611static void maybe_start_thread ()
200send_req (aio_req req)
201{ 612{
613 if (get_nthreads () >= wanted)
614 return;
615
616 /* todo: maybe use idle here, but might be less exact */
617 if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
618 return;
619
620 start_thread ();
621}
622
623static void req_send (aio_req req)
624{
202 nreqs++; 625 ++nreqs;
203 626
204 pthread_mutex_lock (&reqlock); 627 LOCK (reqlock);
205 628 ++nready;
206 req->next = 0; 629 reqq_push (&req_queue, req);
207
208 if (reqe)
209 {
210 reqe->next = req;
211 reqe = req;
212 }
213 else
214 reqe = reqs = req;
215
216 pthread_cond_signal (&reqwait); 630 pthread_cond_signal (&reqwait);
217 pthread_mutex_unlock (&reqlock); 631 UNLOCK (reqlock);
218 632
219 while (nreqs > max_outstanding) 633 maybe_start_thread ();
220 {
221 poll_wait ();
222 poll_cb ();
223 }
224} 634}
225 635
226static void 636static void end_thread (void)
227end_thread (void)
228{ 637{
229 aio_req req; 638 aio_req req;
639
230 New (0, req, 1, aio_cb); 640 Newz (0, req, 1, aio_cb);
641
231 req->type = REQ_QUIT; 642 req->type = REQ_QUIT;
643 req->pri = PRI_MAX + PRI_BIAS;
232 644
233 send_req (req); 645 LOCK (reqlock);
234} 646 reqq_push (&req_queue, req);
647 pthread_cond_signal (&reqwait);
648 UNLOCK (reqlock);
235 649
236static void * 650 LOCK (wrklock);
237aio_proc (void *thr_arg) 651 --started;
652 UNLOCK (wrklock);
653}
654
655static void set_max_idle (int nthreads)
238{ 656{
657 if (WORDACCESS_UNSAFE) LOCK (reqlock);
658 max_idle = nthreads <= 0 ? 1 : nthreads;
659 if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
660}
661
662static void min_parallel (int nthreads)
663{
664 if (wanted < nthreads)
665 wanted = nthreads;
666}
667
668static void max_parallel (int nthreads)
669{
670 if (wanted > nthreads)
671 wanted = nthreads;
672
673 while (started > wanted)
674 end_thread ();
675}
676
677static void poll_wait ()
678{
679 fd_set rfd;
680
681 while (nreqs)
682 {
683 int size;
684 if (WORDACCESS_UNSAFE) LOCK (reslock);
685 size = res_queue.size;
686 if (WORDACCESS_UNSAFE) UNLOCK (reslock);
687
688 if (size)
689 return;
690
691 maybe_start_thread ();
692
693 FD_ZERO(&rfd);
694 FD_SET(respipe [0], &rfd);
695
696 select (respipe [0] + 1, &rfd, 0, 0, 0);
697 }
698}
699
700static int poll_cb ()
701{
702 dSP;
703 int count = 0;
704 int maxreqs = max_poll_reqs;
705 int do_croak = 0;
706 struct timeval tv_start, tv_now;
239 aio_req req; 707 aio_req req;
240 int type;
241 708
242 do 709 if (max_poll_time)
243 { 710 gettimeofday (&tv_start, 0);
244 pthread_mutex_lock (&reqlock);
245 711
712 for (;;)
713 {
246 for (;;) 714 for (;;)
247 { 715 {
248 req = reqs; 716 maybe_start_thread ();
249 717
718 LOCK (reslock);
719 req = reqq_shift (&res_queue);
720
250 if (reqs) 721 if (req)
251 { 722 {
252 reqs = reqs->next; 723 --npending;
253 if (!reqs) reqe = 0; 724
725 if (!res_queue.size)
726 {
727 /* read any signals sent by the worker threads */
728 char buf [32];
729 while (read (respipe [0], buf, 32) == 32)
730 ;
731 }
254 } 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 req_invoke (req);
749
750 count++;
751 }
752
753 req_free (req);
754
755 if (maxreqs && !--maxreqs)
756 break;
757
758 if (max_poll_time)
759 {
760 gettimeofday (&tv_now, 0);
761
762 if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
763 break;
764 }
765 }
766
767 if (nreqs <= max_outstanding)
768 break;
769
770 poll_wait ();
771
772 ++maxreqs;
773 }
774
775 return count;
776}
777
778static void create_pipe ()
779{
780 if (pipe (respipe))
781 croak ("unable to initialize result pipe");
782
783 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
784 croak ("cannot set result pipe to nonblocking mode");
785
786 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
787 croak ("cannot set result pipe to nonblocking mode");
788}
789
790/*****************************************************************************/
791/* work around various missing functions */
792
793#if !HAVE_PREADWRITE
794# define pread aio_pread
795# define pwrite aio_pwrite
796
797/*
798 * make our pread/pwrite safe against themselves, but not against
799 * normal read/write by using a mutex. slows down execution a lot,
800 * but that's your problem, not mine.
801 */
802static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
803
804static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
805{
806 ssize_t res;
807 off_t ooffset;
808
809 LOCK (preadwritelock);
810 ooffset = lseek (fd, 0, SEEK_CUR);
811 lseek (fd, offset, SEEK_SET);
812 res = read (fd, buf, count);
813 lseek (fd, ooffset, SEEK_SET);
814 UNLOCK (preadwritelock);
815
816 return res;
817}
818
819static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
820{
821 ssize_t res;
822 off_t ooffset;
823
824 LOCK (preadwritelock);
825 ooffset = lseek (fd, 0, SEEK_CUR);
826 lseek (fd, offset, SEEK_SET);
827 res = write (fd, buf, count);
828 lseek (fd, offset, SEEK_SET);
829 UNLOCK (preadwritelock);
830
831 return res;
832}
833#endif
834
835#if !HAVE_FDATASYNC
836# define fdatasync fsync
837#endif
838
839#if !HAVE_READAHEAD
840# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
841
842static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
843{
844 dBUF;
845
846 while (count > 0)
847 {
848 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
849
850 pread (fd, aio_buf, len, offset);
851 offset += len;
852 count -= len;
853 }
854
855 errno = 0;
856}
857
858#endif
859
860#if !HAVE_READDIR_R
861# define readdir_r aio_readdir_r
862
863static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
864
865static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
866{
867 struct dirent *e;
868 int errorno;
869
870 LOCK (readdirlock);
871
872 e = readdir (dirp);
873 errorno = errno;
874
875 if (e)
876 {
877 *res = ent;
878 strcpy (ent->d_name, e->d_name);
879 }
880 else
881 *res = 0;
882
883 UNLOCK (readdirlock);
884
885 errno = errorno;
886 return e ? 0 : -1;
887}
888#endif
889
890/* sendfile always needs emulation */
891static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
892{
893 ssize_t res;
894
895 if (!count)
896 return 0;
897
898#if HAVE_SENDFILE
899# if __linux
900 res = sendfile (ofd, ifd, &offset, count);
901
902# elif __freebsd
903 /*
904 * Of course, the freebsd sendfile is a dire hack with no thoughts
905 * wasted on making it similar to other I/O functions.
906 */
907 {
908 off_t sbytes;
909 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
910
911 if (res < 0 && sbytes)
912 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
913 res = sbytes;
914 }
915
916# elif __hpux
917 res = sendfile (ofd, ifd, offset, count, 0, 0);
918
919# elif __solaris
920 {
921 struct sendfilevec vec;
922 size_t sbytes;
923
924 vec.sfv_fd = ifd;
925 vec.sfv_flag = 0;
926 vec.sfv_off = offset;
927 vec.sfv_len = count;
928
929 res = sendfilev (ofd, &vec, 1, &sbytes);
930
931 if (res < 0 && sbytes)
932 res = sbytes;
933 }
934
935# endif
936#else
937 res = -1;
938 errno = ENOSYS;
939#endif
940
941 if (res < 0
942 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
943#if __solaris
944 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
945#endif
946 )
947 )
948 {
949 /* emulate sendfile. this is a major pain in the ass */
950 dBUF;
951
952 res = 0;
953
954 while (count)
955 {
956 ssize_t cnt;
957
958 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
959
960 if (cnt <= 0)
961 {
962 if (cnt && !res) res = -1;
963 break;
964 }
965
966 cnt = write (ofd, aio_buf, cnt);
967
968 if (cnt <= 0)
969 {
970 if (cnt && !res) res = -1;
971 break;
972 }
973
974 offset += cnt;
975 res += cnt;
976 count -= cnt;
977 }
978 }
979
980 return res;
981}
982
983/* read a full directory */
984static void scandir_ (aio_req req, worker *self)
985{
986 DIR *dirp;
987 union
988 {
989 struct dirent d;
990 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
991 } *u;
992 struct dirent *entp;
993 char *name, *names;
994 int memlen = 4096;
995 int memofs = 0;
996 int res = 0;
997 int errorno;
998
999 LOCK (wrklock);
1000 self->dirp = dirp = opendir (req->ptr1);
1001 self->dbuf = u = malloc (sizeof (*u));
1002 req->ptr2 = names = malloc (memlen);
1003 UNLOCK (wrklock);
1004
1005 if (dirp && u && names)
1006 for (;;)
1007 {
1008 errno = 0;
1009 readdir_r (dirp, &u->d, &entp);
1010
1011 if (!entp)
1012 break;
1013
1014 name = entp->d_name;
1015
1016 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1017 {
1018 int len = strlen (name) + 1;
1019
1020 res++;
1021
1022 while (memofs + len > memlen)
1023 {
1024 memlen *= 2;
1025 LOCK (wrklock);
1026 req->ptr2 = names = realloc (names, memlen);
1027 UNLOCK (wrklock);
1028
1029 if (!names)
1030 break;
1031 }
1032
1033 memcpy (names + memofs, name, len);
1034 memofs += len;
1035 }
1036 }
1037
1038 if (errno)
1039 res = -1;
1040
1041 req->result = res;
1042}
1043
1044/*****************************************************************************/
1045
1046static void *aio_proc (void *thr_arg)
1047{
1048 aio_req req;
1049 struct timespec ts;
1050 worker *self = (worker *)thr_arg;
1051
1052 /* try to distribute timeouts somewhat evenly */
1053 ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1054 * (1000000000UL / 1024UL);
1055
1056 for (;;)
1057 {
1058 ts.tv_sec = time (0) + IDLE_TIMEOUT;
1059
1060 LOCK (reqlock);
1061
1062 for (;;)
1063 {
1064 self->req = req = reqq_shift (&req_queue);
255 1065
256 if (req) 1066 if (req)
257 break; 1067 break;
258 1068
1069 ++idle;
1070
1071 if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1072 == ETIMEDOUT)
1073 {
1074 if (idle > max_idle)
1075 {
1076 --idle;
1077 UNLOCK (reqlock);
1078 LOCK (wrklock);
1079 --started;
1080 UNLOCK (wrklock);
1081 goto quit;
1082 }
1083
1084 /* we are allowed to idle, so do so without any timeout */
259 pthread_cond_wait (&reqwait, &reqlock); 1085 pthread_cond_wait (&reqwait, &reqlock);
1086 ts.tv_sec = time (0) + IDLE_TIMEOUT;
1087 }
1088
1089 --idle;
260 } 1090 }
261 1091
262 pthread_mutex_unlock (&reqlock); 1092 --nready;
1093
1094 UNLOCK (reqlock);
263 1095
264 errno = 0; /* strictly unnecessary */ 1096 errno = 0; /* strictly unnecessary */
265 1097
266 type = req->type; 1098 if (!(req->flags & FLAG_CANCELLED))
267
268 switch (type) 1099 switch (req->type)
269 { 1100 {
270 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; 1101 case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
271 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; 1102 case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
272#if SYS_readahead 1103
273 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 1104 case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
274#else 1105 case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
275 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break; 1106
1107 case REQ_STAT: req->result = stat (req->ptr1, req->statdata); break;
1108 case REQ_LSTAT: req->result = lstat (req->ptr1, req->statdata); break;
1109 case REQ_FSTAT: req->result = fstat (req->int1, req->statdata); break;
1110
1111 case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1112 case REQ_CLOSE: req->result = close (req->int1); break;
1113 case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1114 case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1115 case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1116 case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1117 case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1118 case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1119 case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1120
1121 case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1122 case REQ_FSYNC: req->result = fsync (req->int1); break;
1123 case REQ_READDIR: scandir_ (req, self); break;
1124
1125 case REQ_BUSY:
1126 {
1127 struct timeval tv;
1128
1129 tv.tv_sec = req->int1;
1130 tv.tv_usec = req->int2;
1131
1132 req->result = select (0, 0, 0, 0, &tv);
1133 }
1134
1135 case REQ_GROUP:
1136 case REQ_NOP:
1137 break;
1138
1139 case REQ_QUIT:
1140 goto quit;
1141
1142 default:
1143 req->result = ENOSYS;
1144 break;
1145 }
1146
1147 req->errorno = errno;
1148
1149 LOCK (reslock);
1150
1151 ++npending;
1152
1153 if (!reqq_push (&res_queue, req))
1154 /* write a dummy byte to the pipe so fh becomes ready */
1155 write (respipe [1], &respipe, 1);
1156
1157 self->req = 0;
1158 worker_clear (self);
1159
1160 UNLOCK (reslock);
1161 }
1162
1163quit:
1164 LOCK (wrklock);
1165 worker_free (self);
1166 UNLOCK (wrklock);
1167
1168 return 0;
1169}
1170
1171/*****************************************************************************/
1172
1173static void atfork_prepare (void)
1174{
1175 LOCK (wrklock);
1176 LOCK (reqlock);
1177 LOCK (reslock);
1178#if !HAVE_PREADWRITE
1179 LOCK (preadwritelock);
276#endif 1180#endif
1181#if !HAVE_READDIR_R
1182 LOCK (readdirlock);
1183#endif
1184}
277 1185
278 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 1186static void atfork_parent (void)
279 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 1187{
280 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 1188#if !HAVE_READDIR_R
1189 UNLOCK (readdirlock);
1190#endif
1191#if !HAVE_PREADWRITE
1192 UNLOCK (preadwritelock);
1193#endif
1194 UNLOCK (reslock);
1195 UNLOCK (reqlock);
1196 UNLOCK (wrklock);
1197}
281 1198
282 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 1199static void atfork_child (void)
283 case REQ_CLOSE: req->result = close (req->fd); break; 1200{
284 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 1201 aio_req prv;
285 1202
286 case REQ_FSYNC: req->result = fsync (req->fd); break; 1203 while (prv = reqq_shift (&req_queue))
287 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 1204 req_free (prv);
288 1205
289 case REQ_QUIT: 1206 while (prv = reqq_shift (&res_queue))
290 break; 1207 req_free (prv);
291 1208
292 default: 1209 while (wrk_first.next != &wrk_first)
293 req->result = ENOSYS;
294 break;
295 }
296
297 req->errorno = errno;
298
299 pthread_mutex_lock (&reslock);
300
301 req->next = 0;
302
303 if (rese)
304 {
305 rese->next = req;
306 rese = req;
307 }
308 else
309 {
310 rese = ress = req;
311
312 /* write a dummy byte to the pipe so fh becomes ready */
313 write (respipe [1], &respipe, 1);
314 }
315
316 pthread_mutex_unlock (&reslock);
317 } 1210 {
318 while (type != REQ_QUIT); 1211 worker *wrk = wrk_first.next;
319 1212
320 return 0; 1213 if (wrk->req)
321} 1214 req_free (wrk->req);
322 1215
1216 worker_clear (wrk);
1217 worker_free (wrk);
1218 }
1219
1220 started = 0;
1221 idle = 0;
1222 nreqs = 0;
1223 nready = 0;
1224 npending = 0;
1225
1226 close (respipe [0]);
1227 close (respipe [1]);
1228 create_pipe ();
1229
1230 atfork_parent ();
1231}
1232
1233#define dREQ \
1234 aio_req req; \
1235 int req_pri = next_pri; \
1236 next_pri = DEFAULT_PRI + PRI_BIAS; \
1237 \
1238 if (SvOK (callback) && !SvROK (callback)) \
1239 croak ("callback must be undef or of reference type"); \
1240 \
1241 Newz (0, req, 1, aio_cb); \
1242 if (!req) \
1243 croak ("out of memory during aio_req allocation"); \
1244 \
1245 req->callback = newSVsv (callback); \
1246 req->pri = req_pri
1247
1248#define REQ_SEND \
1249 req_send (req); \
1250 \
1251 if (GIMME_V != G_VOID) \
1252 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1253
323MODULE = IO::AIO PACKAGE = IO::AIO 1254MODULE = IO::AIO PACKAGE = IO::AIO
324 1255
325PROTOTYPES: ENABLE 1256PROTOTYPES: ENABLE
326 1257
327BOOT: 1258BOOT:
328{ 1259{
329 if (pipe (respipe)) 1260 HV *stash = gv_stashpv ("IO::AIO", 1);
330 croak ("unable to initialize result pipe");
331 1261
332 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1262 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
333 croak ("cannot set result pipe to nonblocking mode"); 1263 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1264 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1265 newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1266 newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1267 newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
334 1268
335 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 1269 create_pipe ();
336 croak ("cannot set result pipe to nonblocking mode"); 1270 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
337} 1271}
338 1272
339void 1273void
340min_parallel(nthreads) 1274max_poll_reqs (int nreqs)
341 int nthreads
342 PROTOTYPE: $ 1275 PROTOTYPE: $
343 CODE: 1276 CODE:
344 while (nthreads > started) 1277 max_poll_reqs = nreqs;
345 start_thread ();
346 1278
347void 1279void
348max_parallel(nthreads) 1280max_poll_time (double nseconds)
349 int nthreads
350 PROTOTYPE: $ 1281 PROTOTYPE: $
351 CODE: 1282 CODE:
352{ 1283 max_poll_time = nseconds * AIO_TICKS;
353 int cur = started;
354 while (cur > nthreads)
355 {
356 end_thread ();
357 cur--;
358 }
359 1284
360 while (started > nthreads) 1285void
361 { 1286min_parallel (int nthreads)
362 poll_wait (); 1287 PROTOTYPE: $
363 poll_cb (); 1288
364 } 1289void
365} 1290max_parallel (int nthreads)
1291 PROTOTYPE: $
1292
1293void
1294max_idle (int nthreads)
1295 PROTOTYPE: $
1296 CODE:
1297 set_max_idle (nthreads);
366 1298
367int 1299int
368max_outstanding(nreqs) 1300max_outstanding (int maxreqs)
369 int nreqs 1301 PROTOTYPE: $
370 PROTOTYPE: $
371 CODE: 1302 CODE:
372 RETVAL = max_outstanding; 1303 RETVAL = max_outstanding;
373 max_outstanding = nreqs; 1304 max_outstanding = maxreqs;
1305 OUTPUT:
1306 RETVAL
374 1307
375void 1308void
376aio_open(pathname,flags,mode,callback=&PL_sv_undef) 1309aio_open (pathname,flags,mode,callback=&PL_sv_undef)
377 SV * pathname 1310 SV * pathname
378 int flags 1311 int flags
379 int mode 1312 int mode
380 SV * callback 1313 SV * callback
381 PROTOTYPE: $$$;$ 1314 PROTOTYPE: $$$;$
382 CODE: 1315 PPCODE:
383{ 1316{
384 aio_req req; 1317 dREQ;
385
386 Newz (0, req, 1, aio_cb);
387
388 if (!req)
389 croak ("out of memory during aio_req allocation");
390 1318
391 req->type = REQ_OPEN; 1319 req->type = REQ_OPEN;
392 req->data = newSVsv (pathname); 1320 req->sv1 = newSVsv (pathname);
393 req->dataptr = SvPV_nolen (req->data); 1321 req->ptr1 = SvPVbyte_nolen (pathname);
394 req->fd = flags; 1322 req->int1 = flags;
395 req->mode = mode; 1323 req->mode = mode;
396 req->callback = SvREFCNT_inc (callback);
397 1324
398 send_req (req); 1325 REQ_SEND;
399} 1326}
400 1327
401void 1328void
402aio_close(fh,callback=&PL_sv_undef) 1329aio_close (fh,callback=&PL_sv_undef)
403 SV * fh 1330 SV * fh
404 SV * callback 1331 SV * callback
405 PROTOTYPE: $;$ 1332 PROTOTYPE: $;$
406 ALIAS: 1333 ALIAS:
407 aio_close = REQ_CLOSE 1334 aio_close = REQ_CLOSE
408 aio_fsync = REQ_FSYNC 1335 aio_fsync = REQ_FSYNC
409 aio_fdatasync = REQ_FDATASYNC 1336 aio_fdatasync = REQ_FDATASYNC
410 CODE: 1337 PPCODE:
411{ 1338{
412 aio_req req; 1339 dREQ;
413
414 Newz (0, req, 1, aio_cb);
415
416 if (!req)
417 croak ("out of memory during aio_req allocation");
418 1340
419 req->type = ix; 1341 req->type = ix;
420 req->fh = newSVsv (fh); 1342 req->fh = newSVsv (fh);
421 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1343 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
422 req->callback = SvREFCNT_inc (callback);
423 1344
424 send_req (req); 1345 REQ_SEND (req);
425} 1346}
426 1347
427void 1348void
428aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 1349aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
429 SV * fh 1350 SV * fh
430 UV offset 1351 UV offset
431 IV length 1352 UV length
432 SV * data 1353 SV * data
433 IV dataoffset 1354 UV dataoffset
434 SV * callback 1355 SV * callback
435 ALIAS: 1356 ALIAS:
436 aio_read = REQ_READ 1357 aio_read = REQ_READ
437 aio_write = REQ_WRITE 1358 aio_write = REQ_WRITE
438 PROTOTYPE: $$$$$;$ 1359 PROTOTYPE: $$$$$;$
439 CODE: 1360 PPCODE:
440{ 1361{
441 aio_req req;
442 STRLEN svlen; 1362 STRLEN svlen;
443 char *svptr = SvPV (data, svlen); 1363 char *svptr = SvPVbyte (data, svlen);
444 1364
445 SvUPGRADE (data, SVt_PV); 1365 SvUPGRADE (data, SVt_PV);
446 SvPOK_on (data); 1366 SvPOK_on (data);
447 1367
448 if (dataoffset < 0) 1368 if (dataoffset < 0)
… …
464 } 1384 }
465 1385
466 if (length < 0) 1386 if (length < 0)
467 croak ("length must not be negative"); 1387 croak ("length must not be negative");
468 1388
469 Newz (0, req, 1, aio_cb); 1389 {
1390 dREQ;
470 1391
471 if (!req)
472 croak ("out of memory during aio_req allocation");
473
474 req->type = ix; 1392 req->type = ix;
475 req->fh = newSVsv (fh); 1393 req->fh = newSVsv (fh);
476 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) 1394 req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
477 : IoOFP (sv_2io (fh))); 1395 : IoOFP (sv_2io (fh)));
478 req->offset = offset; 1396 req->offs = offset;
479 req->length = length; 1397 req->size = length;
480 req->data = SvREFCNT_inc (data); 1398 req->sv1 = SvREFCNT_inc (data);
481 req->dataptr = (char *)svptr + dataoffset; 1399 req->ptr1 = (char *)svptr + dataoffset;
482 req->callback = SvREFCNT_inc (callback); 1400 req->stroffset = dataoffset;
483 1401
484 send_req (req); 1402 if (!SvREADONLY (data))
485} 1403 {
1404 SvREADONLY_on (data);
1405 req->flags |= FLAG_DATA_RO_OFF;
1406 }
486 1407
1408 REQ_SEND;
1409 }
1410}
1411
487void 1412void
1413aio_readlink (path,callback=&PL_sv_undef)
1414 SV * path
1415 SV * callback
1416 PROTOTYPE: $$;$
1417 PPCODE:
1418{
1419 SV *data;
1420 dREQ;
1421
1422 data = newSV (NAME_MAX);
1423 SvPOK_on (data);
1424
1425 req->type = REQ_READLINK;
1426 req->fh = newSVsv (path);
1427 req->ptr2 = SvPVbyte_nolen (path);
1428 req->sv1 = data;
1429 req->ptr1 = SvPVbyte_nolen (data);
1430
1431 REQ_SEND;
1432}
1433
1434void
1435aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1436 SV * out_fh
1437 SV * in_fh
1438 UV in_offset
1439 UV length
1440 SV * callback
1441 PROTOTYPE: $$$$;$
1442 PPCODE:
1443{
1444 dREQ;
1445
1446 req->type = REQ_SENDFILE;
1447 req->fh = newSVsv (out_fh);
1448 req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1449 req->sv2 = newSVsv (in_fh);
1450 req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1451 req->offs = in_offset;
1452 req->size = length;
1453
1454 REQ_SEND;
1455}
1456
1457void
488aio_readahead(fh,offset,length,callback=&PL_sv_undef) 1458aio_readahead (fh,offset,length,callback=&PL_sv_undef)
489 SV * fh 1459 SV * fh
490 UV offset 1460 UV offset
491 IV length 1461 IV length
492 SV * callback 1462 SV * callback
493 PROTOTYPE: $$$;$ 1463 PROTOTYPE: $$$;$
494 CODE: 1464 PPCODE:
495{ 1465{
496 aio_req req; 1466 dREQ;
497
498 if (length < 0)
499 croak ("length must not be negative");
500
501 Newz (0, req, 1, aio_cb);
502
503 if (!req)
504 croak ("out of memory during aio_req allocation");
505 1467
506 req->type = REQ_READAHEAD; 1468 req->type = REQ_READAHEAD;
507 req->fh = newSVsv (fh); 1469 req->fh = newSVsv (fh);
508 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1470 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
509 req->offset = offset; 1471 req->offs = offset;
510 req->length = length; 1472 req->size = length;
511 req->callback = SvREFCNT_inc (callback);
512 1473
513 send_req (req); 1474 REQ_SEND;
514} 1475}
515 1476
516void 1477void
517aio_stat(fh_or_path,callback=&PL_sv_undef) 1478aio_stat (fh_or_path,callback=&PL_sv_undef)
518 SV * fh_or_path 1479 SV * fh_or_path
519 SV * callback 1480 SV * callback
520 ALIAS: 1481 ALIAS:
521 aio_stat = REQ_STAT 1482 aio_stat = REQ_STAT
522 aio_lstat = REQ_LSTAT 1483 aio_lstat = REQ_LSTAT
523 CODE: 1484 PPCODE:
524{ 1485{
525 aio_req req; 1486 dREQ;
526
527 Newz (0, req, 1, aio_cb);
528
529 if (!req)
530 croak ("out of memory during aio_req allocation");
531 1487
532 New (0, req->statdata, 1, Stat_t); 1488 New (0, req->statdata, 1, Stat_t);
533
534 if (!req->statdata) 1489 if (!req->statdata)
1490 {
1491 req_free (req);
535 croak ("out of memory during aio_req->statdata allocation"); 1492 croak ("out of memory during aio_req->statdata allocation");
1493 }
536 1494
537 if (SvPOK (fh_or_path)) 1495 if (SvPOK (fh_or_path))
538 { 1496 {
539 req->type = ix; 1497 req->type = ix;
540 req->data = newSVsv (fh_or_path); 1498 req->sv1 = newSVsv (fh_or_path);
541 req->dataptr = SvPV_nolen (req->data); 1499 req->ptr1 = SvPVbyte_nolen (fh_or_path);
542 } 1500 }
543 else 1501 else
544 { 1502 {
545 req->type = REQ_FSTAT; 1503 req->type = REQ_FSTAT;
546 req->fh = newSVsv (fh_or_path); 1504 req->fh = newSVsv (fh_or_path);
547 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1505 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
548 } 1506 }
549 1507
550 req->callback = SvREFCNT_inc (callback); 1508 REQ_SEND;
551
552 send_req (req);
553} 1509}
554 1510
555void 1511void
556aio_unlink(pathname,callback=&PL_sv_undef) 1512aio_unlink (pathname,callback=&PL_sv_undef)
557 SV * pathname 1513 SV * pathname
558 SV * callback 1514 SV * callback
1515 ALIAS:
1516 aio_unlink = REQ_UNLINK
1517 aio_rmdir = REQ_RMDIR
1518 aio_readdir = REQ_READDIR
1519 PPCODE:
1520{
1521 dREQ;
1522
1523 req->type = ix;
1524 req->sv1 = newSVsv (pathname);
1525 req->ptr1 = SvPVbyte_nolen (pathname);
1526
1527 REQ_SEND;
1528}
1529
1530void
1531aio_link (oldpath,newpath,callback=&PL_sv_undef)
1532 SV * oldpath
1533 SV * newpath
1534 SV * callback
1535 ALIAS:
1536 aio_link = REQ_LINK
1537 aio_symlink = REQ_SYMLINK
1538 aio_rename = REQ_RENAME
1539 PPCODE:
1540{
1541 dREQ;
1542
1543 req->type = ix;
1544 req->fh = newSVsv (oldpath);
1545 req->ptr2 = SvPVbyte_nolen (req->fh);
1546 req->sv1 = newSVsv (newpath);
1547 req->ptr1 = SvPVbyte_nolen (newpath);
1548
1549 REQ_SEND;
1550}
1551
1552void
1553aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1554 SV * pathname
1555 SV * callback
1556 UV mode
1557 UV dev
1558 PPCODE:
1559{
1560 dREQ;
1561
1562 req->type = REQ_MKNOD;
1563 req->sv1 = newSVsv (pathname);
1564 req->ptr1 = SvPVbyte_nolen (pathname);
1565 req->mode = (mode_t)mode;
1566 req->offs = dev;
1567
1568 REQ_SEND;
1569}
1570
1571void
1572aio_busy (delay,callback=&PL_sv_undef)
1573 double delay
1574 SV * callback
1575 PPCODE:
1576{
1577 dREQ;
1578
1579 req->type = REQ_BUSY;
1580 req->int1 = delay < 0. ? 0 : delay;
1581 req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1582
1583 REQ_SEND;
1584}
1585
1586void
1587aio_group (callback=&PL_sv_undef)
1588 SV * callback
1589 PROTOTYPE: ;$
1590 PPCODE:
1591{
1592 dREQ;
1593
1594 req->type = REQ_GROUP;
1595
1596 req_send (req);
1597 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1598}
1599
1600void
1601aio_nop (callback=&PL_sv_undef)
1602 SV * callback
1603 PPCODE:
1604{
1605 dREQ;
1606
1607 req->type = REQ_NOP;
1608
1609 REQ_SEND;
1610}
1611
1612int
1613aioreq_pri (int pri = 0)
1614 PROTOTYPE: ;$
559 CODE: 1615 CODE:
560{ 1616 RETVAL = next_pri - PRI_BIAS;
561 aio_req req; 1617 if (items > 0)
562 1618 {
563 Newz (0, req, 1, aio_cb); 1619 if (pri < PRI_MIN) pri = PRI_MIN;
564 1620 if (pri > PRI_MAX) pri = PRI_MAX;
565 if (!req) 1621 next_pri = pri + PRI_BIAS;
566 croak ("out of memory during aio_req allocation"); 1622 }
567 1623 OUTPUT:
568 req->type = REQ_UNLINK; 1624 RETVAL
569 req->data = newSVsv (pathname);
570 req->dataptr = SvPV_nolen (req->data);
571 req->callback = SvREFCNT_inc (callback);
572
573 send_req (req);
574}
575 1625
576void 1626void
1627aioreq_nice (int nice = 0)
1628 CODE:
1629 nice = next_pri - nice;
1630 if (nice < PRI_MIN) nice = PRI_MIN;
1631 if (nice > PRI_MAX) nice = PRI_MAX;
1632 next_pri = nice + PRI_BIAS;
1633
1634void
577flush() 1635flush ()
578 PROTOTYPE: 1636 PROTOTYPE:
579 CODE: 1637 CODE:
580 while (nreqs) 1638 while (nreqs)
581 { 1639 {
582 poll_wait (); 1640 poll_wait ();
583 poll_cb (); 1641 poll_cb (0);
584 } 1642 }
585 1643
586void 1644void
587poll() 1645poll()
588 PROTOTYPE: 1646 PROTOTYPE:
589 CODE: 1647 CODE:
590 if (nreqs) 1648 if (nreqs)
591 { 1649 {
592 poll_wait (); 1650 poll_wait ();
593 poll_cb (); 1651 poll_cb (0);
594 } 1652 }
595 1653
596int 1654int
597poll_fileno() 1655poll_fileno()
598 PROTOTYPE: 1656 PROTOTYPE:
… …
622 CODE: 1680 CODE:
623 RETVAL = nreqs; 1681 RETVAL = nreqs;
624 OUTPUT: 1682 OUTPUT:
625 RETVAL 1683 RETVAL
626 1684
1685int
1686nready()
1687 PROTOTYPE:
1688 CODE:
1689 RETVAL = get_nready ();
1690 OUTPUT:
1691 RETVAL
1692
1693int
1694npending()
1695 PROTOTYPE:
1696 CODE:
1697 RETVAL = get_npending ();
1698 OUTPUT:
1699 RETVAL
1700
1701int
1702nthreads()
1703 PROTOTYPE:
1704 CODE:
1705 if (WORDACCESS_UNSAFE) LOCK (wrklock);
1706 RETVAL = started;
1707 if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1708 OUTPUT:
1709 RETVAL
1710
1711PROTOTYPES: DISABLE
1712
1713MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1714
1715void
1716cancel (aio_req_ornot req)
1717 CODE:
1718 req_cancel (req);
1719
1720void
1721cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1722 CODE:
1723 SvREFCNT_dec (req->callback);
1724 req->callback = newSVsv (callback);
1725
1726MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1727
1728void
1729add (aio_req grp, ...)
1730 PPCODE:
1731{
1732 int i;
1733 aio_req req;
1734
1735 if (grp->int1 == 2)
1736 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1737
1738 for (i = 1; i < items; ++i )
1739 {
1740 if (GIMME_V != G_VOID)
1741 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1742
1743 req = SvAIO_REQ (ST (i));
1744
1745 if (req)
1746 {
1747 ++grp->size;
1748 req->grp = grp;
1749
1750 req->grp_prev = 0;
1751 req->grp_next = grp->grp_first;
1752
1753 if (grp->grp_first)
1754 grp->grp_first->grp_prev = req;
1755
1756 grp->grp_first = req;
1757 }
1758 }
1759}
1760
1761void
1762cancel_subs (aio_req_ornot req)
1763 CODE:
1764 req_cancel_subs (req);
1765
1766void
1767result (aio_req grp, ...)
1768 CODE:
1769{
1770 int i;
1771 AV *av;
1772
1773 grp->errorno = errno;
1774
1775 av = newAV ();
1776
1777 for (i = 1; i < items; ++i )
1778 av_push (av, newSVsv (ST (i)));
1779
1780 SvREFCNT_dec (grp->sv1);
1781 grp->sv1 = (SV *)av;
1782}
1783
1784void
1785errno (aio_req grp, int errorno = errno)
1786 CODE:
1787 grp->errorno = errorno;
1788
1789void
1790limit (aio_req grp, int limit)
1791 CODE:
1792 grp->int2 = limit;
1793 aio_grp_feed (grp);
1794
1795void
1796feed (aio_req grp, SV *callback=&PL_sv_undef)
1797 CODE:
1798{
1799 SvREFCNT_dec (grp->sv2);
1800 grp->sv2 = newSVsv (callback);
1801
1802 if (grp->int2 <= 0)
1803 grp->int2 = 2;
1804
1805 aio_grp_feed (grp);
1806}
1807

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