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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.10 by root, Wed Jul 13 00:13:09 2005 UTC vs.
Revision 1.87 by root, Mon Oct 30 23:42:27 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
5#define _XOPEN_SOURCE 500 17#include "autoconf/config.h"
6 18
19#include <pthread.h>
20
21#include <stddef.h>
22#include <errno.h>
23#include <sys/time.h>
24#include <sys/select.h>
7#include <sys/types.h> 25#include <sys/types.h>
8#include <sys/stat.h> 26#include <sys/stat.h>
9 27#include <limits.h>
10#include <unistd.h> 28#include <unistd.h>
11#include <fcntl.h> 29#include <fcntl.h>
12#include <signal.h> 30#include <signal.h>
13#include <sched.h> 31#include <sched.h>
32
33#if HAVE_SENDFILE
14#if __linux 34# if __linux
35# include <sys/sendfile.h>
36# elif __freebsd
15#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
16#endif 46#endif
17 47
18#include <pthread.h> 48/* number of seconds after which idle threads exit */
49#define IDLE_TIMEOUT 10
19 50
20typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 51/* used for struct dirent, AIX doesn't provide it */
21typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 52#ifndef NAME_MAX
22typedef 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
23 60
24#if __ia64 61#if __ia64
25# define STACKSIZE 65536 62# define STACKSIZE 65536
63#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
64# define STACKSIZE PTHREAD_STACK_MIN
26#else 65#else
27# define STACKSIZE 4096 66# define STACKSIZE 16384
28#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;
29 91
30enum { 92enum {
31 REQ_QUIT, 93 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 94 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 95 REQ_READ, REQ_WRITE, REQ_READAHEAD,
96 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 97 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 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,
36}; 104};
37 105
106#define AIO_REQ_KLASS "IO::AIO::REQ"
107#define AIO_GRP_KLASS "IO::AIO::GRP"
108
38typedef struct aio_cb { 109typedef struct aio_cb
110{
39 struct aio_cb *volatile next; 111 struct aio_cb *volatile next;
40 112
113 SV *callback, *fh;
114 SV *sv1, *sv2;
115 void *ptr1, *ptr2;
116 off_t offs;
117 size_t size;
118 ssize_t result;
119
120 STRLEN stroffset;
41 int type; 121 int type;
42 122 int int1, int2;
43 int fd; 123 int errorno;
44 off_t offset;
45 size_t length;
46 ssize_t result;
47 mode_t mode; /* open */ 124 mode_t mode; /* open */
48 int errorno;
49 SV *data, *callback;
50 void *dataptr;
51 STRLEN dataoffset;
52 125
53 Stat_t *statdata; 126 unsigned char flags;
127 unsigned char pri;
128
129 SV *self; /* the perl counterpart of this request, if any */
130 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
54} aio_cb; 131} aio_cb;
55 132
133enum {
134 FLAG_CANCELLED = 0x01,
135 FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
136 FLAG_PTR2_FREE = 0x80, /* need free(ptr2) */
137};
138
56typedef aio_cb *aio_req; 139typedef aio_cb *aio_req;
140typedef aio_cb *aio_req_ornot;
57 141
58static int started; 142enum {
59static int nreqs; 143 PRI_MIN = -4,
60static 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;
61static int respipe [2]; 219static int respipe [2];
62 220
63static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 221static pthread_mutex_t reslock = AIO_MUTEX_INIT;
64static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 222static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
65static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 223static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66 224
67static volatile aio_req reqs, reqe; /* queue start, queue end */ 225#if WORDACCESS_UNSAFE
68static volatile aio_req ress, rese; /* queue start, queue end */
69 226
70static void 227static unsigned int get_nready ()
71poll_wait ()
72{ 228{
73 if (!nreqs) 229 unsigned int retval;
230
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])
287 {
288 q->qe[pri]->next = req;
289 q->qe[pri] = req;
290 }
291 else
292 q->qe[pri] = q->qs[pri] = req;
293
294 return q->size++;
295}
296
297aio_req reqq_shift (reqq *q)
298{
299 int pri;
300
301 if (!q->size)
74 return; 302 return 0;
75 303
76 fd_set rfd; 304 --q->size;
77 FD_ZERO(&rfd);
78 FD_SET(respipe [0], &rfd);
79 305
80 select (respipe [0] + 1, &rfd, 0, 0, 0); 306 for (pri = NUM_PRI; pri--; )
81} 307 {
308 aio_req req = q->qs[pri];
82 309
83static int 310 if (req)
84poll_cb () 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)
85{ 398{
86 dSP; 399 dSP;
87 int count = 0;
88 aio_req req;
89
90 {
91 /* read and signals sent by the worker threads */
92 char buf [32];
93 while (read (respipe [0], buf, 32) > 0)
94 ;
95 }
96 400
97 for (;;) 401 if (req->flags & FLAG_SV1_RO_OFF)
402 SvREADONLY_off (req->sv1);
403
404 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
98 { 405 {
99 pthread_mutex_lock (&reslock); 406 ENTER;
407 SAVETMPS;
408 PUSHMARK (SP);
409 EXTEND (SP, 1);
100 410
101 req = ress; 411 switch (req->type)
102
103 if (ress)
104 { 412 {
105 ress = ress->next; 413 case REQ_READDIR:
106 if (!ress) rese = 0;
107 }
108
109 pthread_mutex_unlock (&reslock);
110
111 if (!req)
112 break;
113
114 nreqs--;
115
116 if (req->type == REQ_QUIT)
117 started--;
118 else
119 {
120 int errorno = errno;
121 errno = req->errorno;
122
123 if (req->type == REQ_READ)
124 SvCUR_set (req->data, req->dataoffset
125 + req->result > 0 ? req->result : 0);
126
127 if (req->data)
128 SvREFCNT_dec (req->data);
129
130 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
131 { 414 {
132 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 415 SV *rv = &PL_sv_undef;
133 PL_laststatval = req->result;
134 PL_statcache = *(req->statdata);
135 416
136 Safefree (req->statdata); 417 if (req->result >= 0)
418 {
419 int i;
420 char *buf = req->ptr2;
421 AV *av = newAV ();
422
423 av_extend (av, req->result - 1);
424
425 for (i = 0; i < req->result; ++i)
426 {
427 SV *sv = newSVpv (buf, 0);
428
429 av_store (av, i, sv);
430 buf += SvCUR (sv) + 1;
431 }
432
433 rv = sv_2mortal (newRV_noinc ((SV *)av));
434 }
435
436 PUSHs (rv);
137 } 437 }
438 break;
138 439
139 PUSHMARK (SP); 440 case REQ_OPEN:
140 XPUSHs (sv_2mortal (newSViv (req->result)));
141
142 if (req->type == REQ_OPEN)
143 { 441 {
144 /* convert fd to fh */ 442 /* convert fd to fh */
145 SV *fh; 443 SV *fh;
146 444
445 PUSHs (sv_2mortal (newSViv (req->result)));
147 PUTBACK; 446 PUTBACK;
148 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 447 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
149 SPAGAIN; 448 SPAGAIN;
150 449
151 fh = POPs; 450 fh = SvREFCNT_inc (POPs);
152 451
153 PUSHMARK (SP); 452 PUSHMARK (SP);
154 XPUSHs (fh); 453 XPUSHs (sv_2mortal (fh));
155 } 454 }
455 break;
156 456
157 if (SvOK (req->callback)) 457 case REQ_GROUP:
458 req->int1 = 2; /* mark group as finished */
459
460 if (req->sv1)
158 { 461 {
159 PUTBACK; 462 int i;
160 call_sv (req->callback, G_VOID | G_EVAL); 463 AV *av = (AV *)req->sv1;
161 SPAGAIN; 464
465 EXTEND (SP, AvFILL (av) + 1);
466 for (i = 0; i <= AvFILL (av); ++i)
467 PUSHs (*av_fetch (av, i, 0));
162 } 468 }
469 break;
470
471 case REQ_NOP:
472 case REQ_BUSY:
473 break;
474
475 case REQ_READLINK:
476 if (req->result > 0)
163 477 {
164 if (req->callback) 478 SvCUR_set (req->sv1, req->result);
165 SvREFCNT_dec (req->callback); 479 *SvEND (req->sv1) = 0;
480 PUSHs (req->sv1);
481 }
482 break;
166 483
167 errno = errorno; 484 case REQ_STAT:
168 count++; 485 case REQ_LSTAT:
486 case REQ_FSTAT:
487 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
488 PL_laststatval = req->result;
489 PL_statcache = *(Stat_t *)(req->ptr2);
490 PUSHs (sv_2mortal (newSViv (req->result)));
491 break;
492
493 case REQ_READ:
494 SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
495 *SvEND (req->sv1) = 0;
496 PUSHs (sv_2mortal (newSViv (req->result)));
497 break;
498
499 default:
500 PUSHs (sv_2mortal (newSViv (req->result)));
501 break;
169 } 502 }
170 503
171 Safefree (req); 504 errno = req->errorno;
505
506 PUTBACK;
507 call_sv (req->callback, G_VOID | G_EVAL);
508 SPAGAIN;
509
510 FREETMPS;
511 LEAVE;
172 } 512 }
173 513
174 return count; 514 if (req->grp)
515 {
516 aio_req grp = req->grp;
517
518 /* unlink request */
519 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
520 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
521
522 if (grp->grp_first == req)
523 grp->grp_first = req->grp_next;
524
525 aio_grp_dec (grp);
526 }
527
528 if (SvTRUE (ERRSV))
529 {
530 req_free (req);
531 croak (0);
532 }
533}
534
535static void req_free (aio_req req)
536{
537 if (req->self)
538 {
539 sv_unmagic (req->self, PERL_MAGIC_ext);
540 SvREFCNT_dec (req->self);
541 }
542
543 SvREFCNT_dec (req->fh);
544 SvREFCNT_dec (req->sv1);
545 SvREFCNT_dec (req->sv2);
546 SvREFCNT_dec (req->callback);
547
548 if (req->flags & FLAG_PTR2_FREE)
549 free (req->ptr2);
550
551 Safefree (req);
552}
553
554static void req_cancel_subs (aio_req grp)
555{
556 aio_req sub;
557
558 if (grp->type != REQ_GROUP)
559 return;
560
561 SvREFCNT_dec (grp->sv2);
562 grp->sv2 = 0;
563
564 for (sub = grp->grp_first; sub; sub = sub->grp_next)
565 req_cancel (sub);
566}
567
568static void req_cancel (aio_req req)
569{
570 req->flags |= FLAG_CANCELLED;
571
572 req_cancel_subs (req);
175} 573}
176 574
177static void *aio_proc(void *arg); 575static void *aio_proc(void *arg);
178 576
179static void
180start_thread (void) 577static void start_thread (void)
181{ 578{
182 sigset_t fullsigset, oldsigset; 579 sigset_t fullsigset, oldsigset;
183 pthread_t tid;
184 pthread_attr_t attr; 580 pthread_attr_t attr;
581
582 worker *wrk = calloc (1, sizeof (worker));
583
584 if (!wrk)
585 croak ("unable to allocate worker thread data");
185 586
186 pthread_attr_init (&attr); 587 pthread_attr_init (&attr);
187 pthread_attr_setstacksize (&attr, STACKSIZE); 588 pthread_attr_setstacksize (&attr, STACKSIZE);
188 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 589 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
590#ifdef PTHREAD_SCOPE_PROCESS
591 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
592#endif
189 593
190 sigfillset (&fullsigset); 594 sigfillset (&fullsigset);
595
596 LOCK (wrklock);
191 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); 597 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
192 598
193 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 599 if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
194 started++;
195
196 sigprocmask (SIG_SETMASK, &oldsigset, 0);
197}
198
199static void
200send_req (aio_req req)
201{
202 nreqs++;
203
204 pthread_mutex_lock (&reqlock);
205
206 req->next = 0;
207
208 if (reqe)
209 { 600 {
210 reqe->next = req; 601 wrk->prev = &wrk_first;
211 reqe = req; 602 wrk->next = wrk_first.next;
603 wrk_first.next->prev = wrk;
604 wrk_first.next = wrk;
605 ++started;
212 } 606 }
213 else 607 else
214 reqe = reqs = req; 608 free (wrk);
215 609
610 sigprocmask (SIG_SETMASK, &oldsigset, 0);
611 UNLOCK (wrklock);
612}
613
614static void maybe_start_thread ()
615{
616 if (get_nthreads () >= wanted)
617 return;
618
619 /* todo: maybe use idle here, but might be less exact */
620 if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
621 return;
622
623 start_thread ();
624}
625
626static void req_send (aio_req req)
627{
628 ++nreqs;
629
630 LOCK (reqlock);
631 ++nready;
632 reqq_push (&req_queue, req);
216 pthread_cond_signal (&reqwait); 633 pthread_cond_signal (&reqwait);
217 pthread_mutex_unlock (&reqlock); 634 UNLOCK (reqlock);
218 635
219 while (nreqs > max_outstanding) 636 maybe_start_thread ();
637}
638
639static void end_thread (void)
640{
641 aio_req req;
642
643 Newz (0, req, 1, aio_cb);
644
645 req->type = REQ_QUIT;
646 req->pri = PRI_MAX + PRI_BIAS;
647
648 LOCK (reqlock);
649 reqq_push (&req_queue, req);
650 pthread_cond_signal (&reqwait);
651 UNLOCK (reqlock);
652
653 LOCK (wrklock);
654 --started;
655 UNLOCK (wrklock);
656}
657
658static void set_max_idle (int nthreads)
659{
660 if (WORDACCESS_UNSAFE) LOCK (reqlock);
661 max_idle = nthreads <= 0 ? 1 : nthreads;
662 if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
663}
664
665static void min_parallel (int nthreads)
666{
667 if (wanted < nthreads)
668 wanted = nthreads;
669}
670
671static void max_parallel (int nthreads)
672{
673 if (wanted > nthreads)
674 wanted = nthreads;
675
676 while (started > wanted)
677 end_thread ();
678}
679
680static void poll_wait ()
681{
682 fd_set rfd;
683
684 while (nreqs)
220 { 685 {
686 int size;
687 if (WORDACCESS_UNSAFE) LOCK (reslock);
688 size = res_queue.size;
689 if (WORDACCESS_UNSAFE) UNLOCK (reslock);
690
691 if (size)
692 return;
693
694 maybe_start_thread ();
695
696 FD_ZERO(&rfd);
697 FD_SET(respipe [0], &rfd);
698
699 select (respipe [0] + 1, &rfd, 0, 0, 0);
700 }
701}
702
703static int poll_cb ()
704{
705 dSP;
706 int count = 0;
707 int maxreqs = max_poll_reqs;
708 int do_croak = 0;
709 struct timeval tv_start, tv_now;
710 aio_req req;
711
712 if (max_poll_time)
713 gettimeofday (&tv_start, 0);
714
715 for (;;)
716 {
717 for (;;)
718 {
719 maybe_start_thread ();
720
721 LOCK (reslock);
722 req = reqq_shift (&res_queue);
723
724 if (req)
725 {
726 --npending;
727
728 if (!res_queue.size)
729 {
730 /* read any signals sent by the worker threads */
731 char buf [32];
732 while (read (respipe [0], buf, 32) == 32)
733 ;
734 }
735 }
736
737 UNLOCK (reslock);
738
739 if (!req)
740 break;
741
742 --nreqs;
743
744 if (req->type == REQ_GROUP && req->size)
745 {
746 req->int1 = 1; /* mark request as delayed */
747 continue;
748 }
749 else
750 {
751 req_invoke (req);
752
753 count++;
754 }
755
756 req_free (req);
757
758 if (maxreqs && !--maxreqs)
759 break;
760
761 if (max_poll_time)
762 {
763 gettimeofday (&tv_now, 0);
764
765 if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
766 break;
767 }
768 }
769
770 if (nreqs <= max_outstanding)
771 break;
772
221 poll_wait (); 773 poll_wait ();
222 poll_cb (); 774
775 ++maxreqs;
223 } 776 }
224}
225 777
226static void 778 return count;
227end_thread (void)
228{
229 aio_req req;
230 New (0, req, 1, aio_cb);
231 req->type = REQ_QUIT;
232
233 send_req (req);
234} 779}
235 780
236static void 781static void create_pipe ()
237read_write (int dowrite, int fd, off_t offset, size_t length,
238 SV *data, STRLEN dataoffset, SV *callback)
239{ 782{
240 aio_req req; 783 if (pipe (respipe))
241 STRLEN svlen; 784 croak ("unable to initialize result pipe");
242 char *svptr = SvPV (data, svlen);
243 785
244 SvUPGRADE (data, SVt_PV); 786 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
245 SvPOK_on (data); 787 croak ("cannot set result pipe to nonblocking mode");
246 788
247 if (dataoffset < 0) 789 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
248 dataoffset += svlen; 790 croak ("cannot set result pipe to nonblocking mode");
791}
249 792
250 if (dataoffset < 0 || dataoffset > svlen) 793/*****************************************************************************/
251 croak ("data offset outside of string"); 794/* work around various missing functions */
252 795
253 if (dowrite) 796#if !HAVE_PREADWRITE
797# define pread aio_pread
798# define pwrite aio_pwrite
799
800/*
801 * make our pread/pwrite safe against themselves, but not against
802 * normal read/write by using a mutex. slows down execution a lot,
803 * but that's your problem, not mine.
804 */
805static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
806
807static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
808{
809 ssize_t res;
810 off_t ooffset;
811
812 LOCK (preadwritelock);
813 ooffset = lseek (fd, 0, SEEK_CUR);
814 lseek (fd, offset, SEEK_SET);
815 res = read (fd, buf, count);
816 lseek (fd, ooffset, SEEK_SET);
817 UNLOCK (preadwritelock);
818
819 return res;
820}
821
822static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
823{
824 ssize_t res;
825 off_t ooffset;
826
827 LOCK (preadwritelock);
828 ooffset = lseek (fd, 0, SEEK_CUR);
829 lseek (fd, offset, SEEK_SET);
830 res = write (fd, buf, count);
831 lseek (fd, offset, SEEK_SET);
832 UNLOCK (preadwritelock);
833
834 return res;
835}
836#endif
837
838#if !HAVE_FDATASYNC
839# define fdatasync fsync
840#endif
841
842#if !HAVE_READAHEAD
843# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
844
845static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
846{
847 dBUF;
848
849 while (count > 0)
254 { 850 {
255 /* write: check length and adjust. */ 851 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
256 if (length < 0 || length + dataoffset > svlen) 852
257 length = svlen - dataoffset; 853 pread (fd, aio_buf, len, offset);
854 offset += len;
855 count -= len;
856 }
857
858 errno = 0;
859}
860
861#endif
862
863#if !HAVE_READDIR_R
864# define readdir_r aio_readdir_r
865
866static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
867
868static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
869{
870 struct dirent *e;
871 int errorno;
872
873 LOCK (readdirlock);
874
875 e = readdir (dirp);
876 errorno = errno;
877
878 if (e)
879 {
880 *res = ent;
881 strcpy (ent->d_name, e->d_name);
258 } 882 }
259 else 883 else
884 *res = 0;
885
886 UNLOCK (readdirlock);
887
888 errno = errorno;
889 return e ? 0 : -1;
890}
891#endif
892
893/* sendfile always needs emulation */
894static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
895{
896 ssize_t res;
897
898 if (!count)
899 return 0;
900
901#if HAVE_SENDFILE
902# if __linux
903 res = sendfile (ofd, ifd, &offset, count);
904
905# elif __freebsd
906 /*
907 * Of course, the freebsd sendfile is a dire hack with no thoughts
908 * wasted on making it similar to other I/O functions.
909 */
910 {
911 off_t sbytes;
912 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
913
914 if (res < 0 && sbytes)
915 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
916 res = sbytes;
917 }
918
919# elif __hpux
920 res = sendfile (ofd, ifd, offset, count, 0, 0);
921
922# elif __solaris
923 {
924 struct sendfilevec vec;
925 size_t sbytes;
926
927 vec.sfv_fd = ifd;
928 vec.sfv_flag = 0;
929 vec.sfv_off = offset;
930 vec.sfv_len = count;
931
932 res = sendfilev (ofd, &vec, 1, &sbytes);
933
934 if (res < 0 && sbytes)
935 res = sbytes;
936 }
937
938# endif
939#else
940 res = -1;
941 errno = ENOSYS;
942#endif
943
944 if (res < 0
945 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
946#if __solaris
947 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
948#endif
949 )
950 )
260 { 951 {
261 /* read: grow scalar as necessary */ 952 /* emulate sendfile. this is a major pain in the ass */
262 svptr = SvGROW (data, length + dataoffset); 953 dBUF;
954
955 res = 0;
956
957 while (count)
958 {
959 ssize_t cnt;
960
961 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
962
963 if (cnt <= 0)
964 {
965 if (cnt && !res) res = -1;
966 break;
967 }
968
969 cnt = write (ofd, aio_buf, cnt);
970
971 if (cnt <= 0)
972 {
973 if (cnt && !res) res = -1;
974 break;
975 }
976
977 offset += cnt;
978 res += cnt;
979 count -= cnt;
980 }
263 } 981 }
264 982
265 if (length < 0) 983 return res;
266 croak ("length must not be negative");
267
268 Newz (0, req, 1, aio_cb);
269
270 if (!req)
271 croak ("out of memory during aio_req allocation");
272
273 req->type = dowrite ? REQ_WRITE : REQ_READ;
274 req->fd = fd;
275 req->offset = offset;
276 req->length = length;
277 req->data = SvREFCNT_inc (data);
278 req->dataptr = (char *)svptr + dataoffset;
279 req->callback = SvREFCNT_inc (callback);
280
281 send_req (req);
282} 984}
283 985
284static void * 986/* read a full directory */
987static void scandir_ (aio_req req, worker *self)
988{
989 DIR *dirp;
990 union
991 {
992 struct dirent d;
993 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
994 } *u;
995 struct dirent *entp;
996 char *name, *names;
997 int memlen = 4096;
998 int memofs = 0;
999 int res = 0;
1000 int errorno;
1001
1002 LOCK (wrklock);
1003 self->dirp = dirp = opendir (req->ptr1);
1004 self->dbuf = u = malloc (sizeof (*u));
1005 req->flags |= FLAG_PTR2_FREE;
1006 req->ptr2 = names = malloc (memlen);
1007 UNLOCK (wrklock);
1008
1009 if (dirp && u && names)
1010 for (;;)
1011 {
1012 errno = 0;
1013 readdir_r (dirp, &u->d, &entp);
1014
1015 if (!entp)
1016 break;
1017
1018 name = entp->d_name;
1019
1020 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1021 {
1022 int len = strlen (name) + 1;
1023
1024 res++;
1025
1026 while (memofs + len > memlen)
1027 {
1028 memlen *= 2;
1029 LOCK (wrklock);
1030 req->ptr2 = names = realloc (names, memlen);
1031 UNLOCK (wrklock);
1032
1033 if (!names)
1034 break;
1035 }
1036
1037 memcpy (names + memofs, name, len);
1038 memofs += len;
1039 }
1040 }
1041
1042 if (errno)
1043 res = -1;
1044
1045 req->result = res;
1046}
1047
1048/*****************************************************************************/
1049
285aio_proc (void *thr_arg) 1050static void *aio_proc (void *thr_arg)
286{ 1051{
287 aio_req req; 1052 aio_req req;
288 int type; 1053 struct timespec ts;
1054 worker *self = (worker *)thr_arg;
289 1055
290 do 1056 /* try to distribute timeouts somewhat evenly */
1057 ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1058 * (1000000000UL / 1024UL);
1059
1060 for (;;)
291 { 1061 {
292 pthread_mutex_lock (&reqlock); 1062 ts.tv_sec = time (0) + IDLE_TIMEOUT;
1063
1064 LOCK (reqlock);
293 1065
294 for (;;) 1066 for (;;)
295 { 1067 {
296 req = reqs; 1068 self->req = req = reqq_shift (&req_queue);
297
298 if (reqs)
299 {
300 reqs = reqs->next;
301 if (!reqs) reqe = 0;
302 }
303 1069
304 if (req) 1070 if (req)
305 break; 1071 break;
306 1072
1073 ++idle;
1074
1075 if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1076 == ETIMEDOUT)
1077 {
1078 if (idle > max_idle)
1079 {
1080 --idle;
1081 UNLOCK (reqlock);
1082 LOCK (wrklock);
1083 --started;
1084 UNLOCK (wrklock);
1085 goto quit;
1086 }
1087
1088 /* we are allowed to idle, so do so without any timeout */
307 pthread_cond_wait (&reqwait, &reqlock); 1089 pthread_cond_wait (&reqwait, &reqlock);
1090 ts.tv_sec = time (0) + IDLE_TIMEOUT;
1091 }
1092
1093 --idle;
308 } 1094 }
309 1095
310 pthread_mutex_unlock (&reqlock); 1096 --nready;
1097
1098 UNLOCK (reqlock);
311 1099
312 errno = 0; /* strictly unnecessary */ 1100 errno = 0; /* strictly unnecessary */
313 1101
314 type = req->type; 1102 if (!(req->flags & FLAG_CANCELLED))
315
316 switch (type) 1103 switch (req->type)
317 { 1104 {
318 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; 1105 case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
319 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; 1106 case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
320#if SYS_readahead 1107
321 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 1108 case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
322#else 1109 case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
323 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break; 1110
1111 case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1112 case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1113 case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1114
1115 case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1116 case REQ_CLOSE: req->result = close (req->int1); break;
1117 case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1118 case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1119 case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1120 case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1121 case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1122 case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1123 case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1124
1125 case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1126 case REQ_FSYNC: req->result = fsync (req->int1); break;
1127 case REQ_READDIR: scandir_ (req, self); break;
1128
1129 case REQ_BUSY:
1130 {
1131 struct timeval tv;
1132
1133 tv.tv_sec = req->int1;
1134 tv.tv_usec = req->int2;
1135
1136 req->result = select (0, 0, 0, 0, &tv);
1137 }
1138
1139 case REQ_GROUP:
1140 case REQ_NOP:
1141 break;
1142
1143 case REQ_QUIT:
1144 goto quit;
1145
1146 default:
1147 req->result = ENOSYS;
1148 break;
1149 }
1150
1151 req->errorno = errno;
1152
1153 LOCK (reslock);
1154
1155 ++npending;
1156
1157 if (!reqq_push (&res_queue, req))
1158 /* write a dummy byte to the pipe so fh becomes ready */
1159 write (respipe [1], &respipe, 1);
1160
1161 self->req = 0;
1162 worker_clear (self);
1163
1164 UNLOCK (reslock);
1165 }
1166
1167quit:
1168 LOCK (wrklock);
1169 worker_free (self);
1170 UNLOCK (wrklock);
1171
1172 return 0;
1173}
1174
1175/*****************************************************************************/
1176
1177static void atfork_prepare (void)
1178{
1179 LOCK (wrklock);
1180 LOCK (reqlock);
1181 LOCK (reslock);
1182#if !HAVE_PREADWRITE
1183 LOCK (preadwritelock);
324#endif 1184#endif
1185#if !HAVE_READDIR_R
1186 LOCK (readdirlock);
1187#endif
1188}
325 1189
326 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 1190static void atfork_parent (void)
327 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 1191{
328 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 1192#if !HAVE_READDIR_R
1193 UNLOCK (readdirlock);
1194#endif
1195#if !HAVE_PREADWRITE
1196 UNLOCK (preadwritelock);
1197#endif
1198 UNLOCK (reslock);
1199 UNLOCK (reqlock);
1200 UNLOCK (wrklock);
1201}
329 1202
330 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 1203static void atfork_child (void)
331 case REQ_CLOSE: req->result = close (req->fd); break; 1204{
332 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 1205 aio_req prv;
333 1206
334 case REQ_FSYNC: req->result = fsync (req->fd); break; 1207 while (prv = reqq_shift (&req_queue))
335 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 1208 req_free (prv);
336 1209
337 case REQ_QUIT: 1210 while (prv = reqq_shift (&res_queue))
338 break; 1211 req_free (prv);
339 1212
340 default: 1213 while (wrk_first.next != &wrk_first)
341 req->result = ENOSYS; 1214 {
342 break; 1215 worker *wrk = wrk_first.next;
343 }
344 1216
345 req->errorno = errno;
346
347 pthread_mutex_lock (&reslock);
348
349 req->next = 0;
350
351 if (rese) 1217 if (wrk->req)
352 { 1218 req_free (wrk->req);
353 rese->next = req;
354 rese = req;
355 }
356 else
357 {
358 rese = ress = req;
359 1219
360 /* write a dummy byte to the pipe so fh becomes ready */ 1220 worker_clear (wrk);
361 write (respipe [1], &respipe, 1); 1221 worker_free (wrk);
362 }
363
364 pthread_mutex_unlock (&reslock);
365 } 1222 }
366 while (type != REQ_QUIT);
367 1223
368 return 0; 1224 started = 0;
369} 1225 idle = 0;
1226 nreqs = 0;
1227 nready = 0;
1228 npending = 0;
370 1229
1230 close (respipe [0]);
1231 close (respipe [1]);
1232 create_pipe ();
1233
1234 atfork_parent ();
1235}
1236
1237#define dREQ \
1238 aio_req req; \
1239 int req_pri = next_pri; \
1240 next_pri = DEFAULT_PRI + PRI_BIAS; \
1241 \
1242 if (SvOK (callback) && !SvROK (callback)) \
1243 croak ("callback must be undef or of reference type"); \
1244 \
1245 Newz (0, req, 1, aio_cb); \
1246 if (!req) \
1247 croak ("out of memory during aio_req allocation"); \
1248 \
1249 req->callback = newSVsv (callback); \
1250 req->pri = req_pri
1251
1252#define REQ_SEND \
1253 req_send (req); \
1254 \
1255 if (GIMME_V != G_VOID) \
1256 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1257
371MODULE = IO::AIO PACKAGE = IO::AIO 1258MODULE = IO::AIO PACKAGE = IO::AIO
372 1259
373PROTOTYPES: ENABLE 1260PROTOTYPES: ENABLE
374 1261
375BOOT: 1262BOOT:
376{ 1263{
377 if (pipe (respipe)) 1264 HV *stash = gv_stashpv ("IO::AIO", 1);
378 croak ("unable to initialize result pipe");
379 1265
380 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1266 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
381 croak ("cannot set result pipe to nonblocking mode"); 1267 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1268 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1269 newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1270 newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1271 newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
382 1272
383 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 1273 create_pipe ();
384 croak ("cannot set result pipe to nonblocking mode"); 1274 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
385} 1275}
386 1276
387void 1277void
388min_parallel(nthreads) 1278max_poll_reqs (int nreqs)
389 int nthreads
390 PROTOTYPE: $ 1279 PROTOTYPE: $
391 CODE: 1280 CODE:
392 while (nthreads > started) 1281 max_poll_reqs = nreqs;
393 start_thread ();
394 1282
395void 1283void
396max_parallel(nthreads) 1284max_poll_time (double nseconds)
397 int nthreads
398 PROTOTYPE: $ 1285 PROTOTYPE: $
399 CODE: 1286 CODE:
400{ 1287 max_poll_time = nseconds * AIO_TICKS;
401 int cur = started;
402 while (cur > nthreads)
403 {
404 end_thread ();
405 cur--;
406 }
407 1288
408 while (started > nthreads) 1289void
409 { 1290min_parallel (int nthreads)
410 poll_wait (); 1291 PROTOTYPE: $
411 poll_cb (); 1292
412 } 1293void
413} 1294max_parallel (int nthreads)
1295 PROTOTYPE: $
1296
1297void
1298max_idle (int nthreads)
1299 PROTOTYPE: $
1300 CODE:
1301 set_max_idle (nthreads);
414 1302
415int 1303int
416max_outstanding(nreqs) 1304max_outstanding (int maxreqs)
417 int nreqs 1305 PROTOTYPE: $
418 PROTOTYPE: $
419 CODE: 1306 CODE:
420 RETVAL = max_outstanding; 1307 RETVAL = max_outstanding;
421 max_outstanding = nreqs; 1308 max_outstanding = maxreqs;
1309 OUTPUT:
1310 RETVAL
422 1311
423void 1312void
424aio_open(pathname,flags,mode,callback=&PL_sv_undef) 1313aio_open (pathname,flags,mode,callback=&PL_sv_undef)
425 SV * pathname 1314 SV * pathname
426 int flags 1315 int flags
427 int mode 1316 int mode
428 SV * callback 1317 SV * callback
429 PROTOTYPE: $$$;$ 1318 PROTOTYPE: $$$;$
430 CODE: 1319 PPCODE:
431{ 1320{
432 aio_req req; 1321 dREQ;
433
434 Newz (0, req, 1, aio_cb);
435
436 if (!req)
437 croak ("out of memory during aio_req allocation");
438 1322
439 req->type = REQ_OPEN; 1323 req->type = REQ_OPEN;
440 req->data = newSVsv (pathname); 1324 req->sv1 = newSVsv (pathname);
441 req->dataptr = SvPV_nolen (req->data); 1325 req->ptr1 = SvPVbyte_nolen (pathname);
442 req->fd = flags; 1326 req->int1 = flags;
443 req->mode = mode; 1327 req->mode = mode;
444 req->callback = SvREFCNT_inc (callback);
445 1328
446 send_req (req); 1329 REQ_SEND;
447} 1330}
448 1331
449void 1332void
450aio_close(fh,callback=&PL_sv_undef) 1333aio_close (fh,callback=&PL_sv_undef)
451 InputStream fh 1334 SV * fh
452 SV * callback 1335 SV * callback
453 PROTOTYPE: $;$ 1336 PROTOTYPE: $;$
454 ALIAS: 1337 ALIAS:
455 aio_close = REQ_CLOSE 1338 aio_close = REQ_CLOSE
456 aio_fsync = REQ_FSYNC 1339 aio_fsync = REQ_FSYNC
457 aio_fdatasync = REQ_FDATASYNC 1340 aio_fdatasync = REQ_FDATASYNC
458 CODE: 1341 PPCODE:
459{ 1342{
460 aio_req req; 1343 dREQ;
461
462 Newz (0, req, 1, aio_cb);
463
464 if (!req)
465 croak ("out of memory during aio_req allocation");
466 1344
467 req->type = ix; 1345 req->type = ix;
1346 req->fh = newSVsv (fh);
468 req->fd = PerlIO_fileno (fh); 1347 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
469 req->callback = SvREFCNT_inc (callback);
470 1348
471 send_req (req); 1349 REQ_SEND (req);
472} 1350}
473 1351
474void 1352void
475aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 1353aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
476 InputStream fh 1354 SV * fh
477 UV offset 1355 UV offset
478 IV length 1356 UV length
479 SV * data 1357 SV * data
480 IV dataoffset 1358 UV dataoffset
481 SV * callback 1359 SV * callback
1360 ALIAS:
1361 aio_read = REQ_READ
1362 aio_write = REQ_WRITE
482 PROTOTYPE: $$$$$;$ 1363 PROTOTYPE: $$$$$;$
483 CODE: 1364 PPCODE:
484 read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
485
486void
487aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
488 OutputStream fh
489 UV offset
490 IV length
491 SV * data
492 IV dataoffset
493 SV * callback
494 PROTOTYPE: $$$$$;$
495 CODE:
496 read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
497
498void
499aio_readahead(fh,offset,length,callback=&PL_sv_undef)
500 InputStream fh
501 UV offset
502 IV length
503 SV * callback
504 PROTOTYPE: $$$;$
505 CODE:
506{ 1365{
507 aio_req req; 1366 STRLEN svlen;
1367 char *svptr = SvPVbyte (data, svlen);
1368
1369 SvUPGRADE (data, SVt_PV);
1370 SvPOK_on (data);
1371
1372 if (dataoffset < 0)
1373 dataoffset += svlen;
1374
1375 if (dataoffset < 0 || dataoffset > svlen)
1376 croak ("data offset outside of string");
1377
1378 if (ix == REQ_WRITE)
1379 {
1380 /* write: check length and adjust. */
1381 if (length < 0 || length + dataoffset > svlen)
1382 length = svlen - dataoffset;
1383 }
1384 else
1385 {
1386 /* read: grow scalar as necessary */
1387 svptr = SvGROW (data, length + dataoffset);
1388 }
508 1389
509 if (length < 0) 1390 if (length < 0)
510 croak ("length must not be negative"); 1391 croak ("length must not be negative");
511 1392
512 Newz (0, req, 1, aio_cb); 1393 {
1394 dREQ;
513 1395
514 if (!req) 1396 req->type = ix;
515 croak ("out of memory during aio_req allocation"); 1397 req->fh = newSVsv (fh);
1398 req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1399 : IoOFP (sv_2io (fh)));
1400 req->offs = offset;
1401 req->size = length;
1402 req->sv1 = SvREFCNT_inc (data);
1403 req->ptr1 = (char *)svptr + dataoffset;
1404 req->stroffset = dataoffset;
1405
1406 if (!SvREADONLY (data))
1407 {
1408 SvREADONLY_on (data);
1409 req->flags |= FLAG_SV1_RO_OFF;
1410 }
1411
1412 REQ_SEND;
1413 }
1414}
1415
1416void
1417aio_readlink (path,callback=&PL_sv_undef)
1418 SV * path
1419 SV * callback
1420 PROTOTYPE: $$;$
1421 PPCODE:
1422{
1423 SV *data;
1424 dREQ;
1425
1426 data = newSV (NAME_MAX);
1427 SvPOK_on (data);
1428
1429 req->type = REQ_READLINK;
1430 req->fh = newSVsv (path);
1431 req->ptr2 = SvPVbyte_nolen (path);
1432 req->sv1 = data;
1433 req->ptr1 = SvPVbyte_nolen (data);
1434
1435 REQ_SEND;
1436}
1437
1438void
1439aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1440 SV * out_fh
1441 SV * in_fh
1442 UV in_offset
1443 UV length
1444 SV * callback
1445 PROTOTYPE: $$$$;$
1446 PPCODE:
1447{
1448 dREQ;
1449
1450 req->type = REQ_SENDFILE;
1451 req->fh = newSVsv (out_fh);
1452 req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1453 req->sv2 = newSVsv (in_fh);
1454 req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1455 req->offs = in_offset;
1456 req->size = length;
1457
1458 REQ_SEND;
1459}
1460
1461void
1462aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1463 SV * fh
1464 UV offset
1465 IV length
1466 SV * callback
1467 PROTOTYPE: $$$;$
1468 PPCODE:
1469{
1470 dREQ;
516 1471
517 req->type = REQ_READAHEAD; 1472 req->type = REQ_READAHEAD;
1473 req->fh = newSVsv (fh);
518 req->fd = PerlIO_fileno (fh); 1474 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
519 req->offset = offset; 1475 req->offs = offset;
520 req->length = length; 1476 req->size = length;
521 req->callback = SvREFCNT_inc (callback);
522 1477
523 send_req (req); 1478 REQ_SEND;
524} 1479}
525 1480
526void 1481void
527aio_stat(fh_or_path,callback=&PL_sv_undef) 1482aio_stat (fh_or_path,callback=&PL_sv_undef)
528 SV * fh_or_path 1483 SV * fh_or_path
529 SV * callback 1484 SV * callback
530 ALIAS: 1485 ALIAS:
531 aio_stat = REQ_STAT 1486 aio_stat = REQ_STAT
532 aio_lstat = REQ_LSTAT 1487 aio_lstat = REQ_LSTAT
533 CODE: 1488 PPCODE:
534{ 1489{
535 aio_req req; 1490 dREQ;
536 1491
537 Newz (0, req, 1, aio_cb); 1492 req->ptr2 = malloc (sizeof (Stat_t));
538
539 if (!req) 1493 if (!req->ptr2)
540 croak ("out of memory during aio_req allocation"); 1494 {
541 1495 req_free (req);
542 New (0, req->statdata, 1, Stat_t);
543
544 if (!req->statdata)
545 croak ("out of memory during aio_req->statdata allocation"); 1496 croak ("out of memory during aio_req statdata allocation");
1497 }
1498
1499 req->flags |= FLAG_PTR2_FREE;
546 1500
547 if (SvPOK (fh_or_path)) 1501 if (SvPOK (fh_or_path))
548 { 1502 {
549 req->type = ix; 1503 req->type = ix;
550 req->data = newSVsv (fh_or_path); 1504 req->sv1 = newSVsv (fh_or_path);
551 req->dataptr = SvPV_nolen (req->data); 1505 req->ptr1 = SvPVbyte_nolen (fh_or_path);
552 } 1506 }
553 else 1507 else
554 { 1508 {
555 req->type = REQ_FSTAT; 1509 req->type = REQ_FSTAT;
1510 req->fh = newSVsv (fh_or_path);
556 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1511 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
557 } 1512 }
558 1513
559 req->callback = SvREFCNT_inc (callback); 1514 REQ_SEND;
560
561 send_req (req);
562} 1515}
563 1516
564void 1517void
565aio_unlink(pathname,callback=&PL_sv_undef) 1518aio_unlink (pathname,callback=&PL_sv_undef)
566 SV * pathname 1519 SV * pathname
567 SV * callback 1520 SV * callback
1521 ALIAS:
1522 aio_unlink = REQ_UNLINK
1523 aio_rmdir = REQ_RMDIR
1524 aio_readdir = REQ_READDIR
1525 PPCODE:
1526{
1527 dREQ;
1528
1529 req->type = ix;
1530 req->sv1 = newSVsv (pathname);
1531 req->ptr1 = SvPVbyte_nolen (pathname);
1532
1533 REQ_SEND;
1534}
1535
1536void
1537aio_link (oldpath,newpath,callback=&PL_sv_undef)
1538 SV * oldpath
1539 SV * newpath
1540 SV * callback
1541 ALIAS:
1542 aio_link = REQ_LINK
1543 aio_symlink = REQ_SYMLINK
1544 aio_rename = REQ_RENAME
1545 PPCODE:
1546{
1547 dREQ;
1548
1549 req->type = ix;
1550 req->fh = newSVsv (oldpath);
1551 req->ptr2 = SvPVbyte_nolen (req->fh);
1552 req->sv1 = newSVsv (newpath);
1553 req->ptr1 = SvPVbyte_nolen (newpath);
1554
1555 REQ_SEND;
1556}
1557
1558void
1559aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1560 SV * pathname
1561 SV * callback
1562 UV mode
1563 UV dev
1564 PPCODE:
1565{
1566 dREQ;
1567
1568 req->type = REQ_MKNOD;
1569 req->sv1 = newSVsv (pathname);
1570 req->ptr1 = SvPVbyte_nolen (pathname);
1571 req->mode = (mode_t)mode;
1572 req->offs = dev;
1573
1574 REQ_SEND;
1575}
1576
1577void
1578aio_busy (delay,callback=&PL_sv_undef)
1579 double delay
1580 SV * callback
1581 PPCODE:
1582{
1583 dREQ;
1584
1585 req->type = REQ_BUSY;
1586 req->int1 = delay < 0. ? 0 : delay;
1587 req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1588
1589 REQ_SEND;
1590}
1591
1592void
1593aio_group (callback=&PL_sv_undef)
1594 SV * callback
1595 PROTOTYPE: ;$
1596 PPCODE:
1597{
1598 dREQ;
1599
1600 req->type = REQ_GROUP;
1601
1602 req_send (req);
1603 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1604}
1605
1606void
1607aio_nop (callback=&PL_sv_undef)
1608 SV * callback
1609 PPCODE:
1610{
1611 dREQ;
1612
1613 req->type = REQ_NOP;
1614
1615 REQ_SEND;
1616}
1617
1618int
1619aioreq_pri (int pri = 0)
1620 PROTOTYPE: ;$
568 CODE: 1621 CODE:
569{ 1622 RETVAL = next_pri - PRI_BIAS;
570 aio_req req; 1623 if (items > 0)
571 1624 {
572 Newz (0, req, 1, aio_cb); 1625 if (pri < PRI_MIN) pri = PRI_MIN;
573 1626 if (pri > PRI_MAX) pri = PRI_MAX;
574 if (!req) 1627 next_pri = pri + PRI_BIAS;
575 croak ("out of memory during aio_req allocation"); 1628 }
576 1629 OUTPUT:
577 req->type = REQ_UNLINK; 1630 RETVAL
578 req->data = newSVsv (pathname);
579 req->dataptr = SvPV_nolen (req->data);
580 req->callback = SvREFCNT_inc (callback);
581
582 send_req (req);
583}
584 1631
585void 1632void
1633aioreq_nice (int nice = 0)
1634 CODE:
1635 nice = next_pri - nice;
1636 if (nice < PRI_MIN) nice = PRI_MIN;
1637 if (nice > PRI_MAX) nice = PRI_MAX;
1638 next_pri = nice + PRI_BIAS;
1639
1640void
586flush() 1641flush ()
587 PROTOTYPE: 1642 PROTOTYPE:
588 CODE: 1643 CODE:
589 while (nreqs) 1644 while (nreqs)
590 { 1645 {
591 poll_wait (); 1646 poll_wait ();
592 poll_cb (); 1647 poll_cb (0);
593 } 1648 }
594 1649
595void 1650void
596poll() 1651poll()
597 PROTOTYPE: 1652 PROTOTYPE:
598 CODE: 1653 CODE:
599 if (nreqs) 1654 if (nreqs)
600 { 1655 {
601 poll_wait (); 1656 poll_wait ();
602 poll_cb (); 1657 poll_cb (0);
603 } 1658 }
604 1659
605int 1660int
606poll_fileno() 1661poll_fileno()
607 PROTOTYPE: 1662 PROTOTYPE:
… …
631 CODE: 1686 CODE:
632 RETVAL = nreqs; 1687 RETVAL = nreqs;
633 OUTPUT: 1688 OUTPUT:
634 RETVAL 1689 RETVAL
635 1690
1691int
1692nready()
1693 PROTOTYPE:
1694 CODE:
1695 RETVAL = get_nready ();
1696 OUTPUT:
1697 RETVAL
1698
1699int
1700npending()
1701 PROTOTYPE:
1702 CODE:
1703 RETVAL = get_npending ();
1704 OUTPUT:
1705 RETVAL
1706
1707int
1708nthreads()
1709 PROTOTYPE:
1710 CODE:
1711 if (WORDACCESS_UNSAFE) LOCK (wrklock);
1712 RETVAL = started;
1713 if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1714 OUTPUT:
1715 RETVAL
1716
1717PROTOTYPES: DISABLE
1718
1719MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1720
1721void
1722cancel (aio_req_ornot req)
1723 CODE:
1724 req_cancel (req);
1725
1726void
1727cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1728 CODE:
1729 SvREFCNT_dec (req->callback);
1730 req->callback = newSVsv (callback);
1731
1732MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1733
1734void
1735add (aio_req grp, ...)
1736 PPCODE:
1737{
1738 int i;
1739 aio_req req;
1740
1741 if (grp->int1 == 2)
1742 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1743
1744 for (i = 1; i < items; ++i )
1745 {
1746 if (GIMME_V != G_VOID)
1747 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1748
1749 req = SvAIO_REQ (ST (i));
1750
1751 if (req)
1752 {
1753 ++grp->size;
1754 req->grp = grp;
1755
1756 req->grp_prev = 0;
1757 req->grp_next = grp->grp_first;
1758
1759 if (grp->grp_first)
1760 grp->grp_first->grp_prev = req;
1761
1762 grp->grp_first = req;
1763 }
1764 }
1765}
1766
1767void
1768cancel_subs (aio_req_ornot req)
1769 CODE:
1770 req_cancel_subs (req);
1771
1772void
1773result (aio_req grp, ...)
1774 CODE:
1775{
1776 int i;
1777 AV *av;
1778
1779 grp->errorno = errno;
1780
1781 av = newAV ();
1782
1783 for (i = 1; i < items; ++i )
1784 av_push (av, newSVsv (ST (i)));
1785
1786 SvREFCNT_dec (grp->sv1);
1787 grp->sv1 = (SV *)av;
1788}
1789
1790void
1791errno (aio_req grp, int errorno = errno)
1792 CODE:
1793 grp->errorno = errorno;
1794
1795void
1796limit (aio_req grp, int limit)
1797 CODE:
1798 grp->int2 = limit;
1799 aio_grp_feed (grp);
1800
1801void
1802feed (aio_req grp, SV *callback=&PL_sv_undef)
1803 CODE:
1804{
1805 SvREFCNT_dec (grp->sv2);
1806 grp->sv2 = newSVsv (callback);
1807
1808 if (grp->int2 <= 0)
1809 grp->int2 = 2;
1810
1811 aio_grp_feed (grp);
1812}
1813

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