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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 1.90 by root, Tue Oct 31 00:32:19 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;
91
92typedef SV SV8; /* byte-sv, used for argument-checking */
29 93
30enum { 94enum {
31 REQ_QUIT, 95 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 96 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 97 REQ_READ, REQ_WRITE, REQ_READAHEAD,
98 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 99 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 100 REQ_FSYNC, REQ_FDATASYNC,
101 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
102 REQ_MKNOD, REQ_READDIR,
103 REQ_LINK, REQ_SYMLINK, REQ_READLINK,
104 REQ_GROUP, REQ_NOP,
105 REQ_BUSY,
36}; 106};
37 107
108#define AIO_REQ_KLASS "IO::AIO::REQ"
109#define AIO_GRP_KLASS "IO::AIO::GRP"
110
38typedef struct aio_cb { 111typedef struct aio_cb
112{
39 struct aio_cb *volatile next; 113 struct aio_cb *volatile next;
40 114
115 SV *callback, *fh;
116 SV *sv1, *sv2;
117 void *ptr1, *ptr2;
118 off_t offs;
119 size_t size;
120 ssize_t result;
121
122 STRLEN stroffset;
41 int type; 123 int type;
42 124 int int1, int2;
43 int fd; 125 int errorno;
44 off_t offset;
45 size_t length;
46 ssize_t result;
47 mode_t mode; /* open */ 126 mode_t mode; /* open */
48 int errorno;
49 SV *data, *callback;
50 void *dataptr;
51 STRLEN dataoffset;
52 127
53 Stat_t *statdata; 128 unsigned char flags;
129 unsigned char pri;
130
131 SV *self; /* the perl counterpart of this request, if any */
132 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
54} aio_cb; 133} aio_cb;
55 134
135enum {
136 FLAG_CANCELLED = 0x01, /* request was cancelled */
137 FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
138 FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
139};
140
56typedef aio_cb *aio_req; 141typedef aio_cb *aio_req;
142typedef aio_cb *aio_req_ornot;
57 143
58static int started; 144enum {
59static int nreqs; 145 PRI_MIN = -4,
60static int max_outstanding = 1<<30; 146 PRI_MAX = 4,
147
148 DEFAULT_PRI = 0,
149 PRI_BIAS = -PRI_MIN,
150 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
151};
152
153#define AIO_TICKS ((1000000 + 1023) >> 10)
154
155static unsigned int max_poll_time = 0;
156static unsigned int max_poll_reqs = 0;
157
158/* calculcate time difference in ~1/AIO_TICKS of a second */
159static int tvdiff (struct timeval *tv1, struct timeval *tv2)
160{
161 return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
162 + ((tv2->tv_usec - tv1->tv_usec) >> 10);
163}
164
165static int next_pri = DEFAULT_PRI + PRI_BIAS;
166
167static unsigned int started, idle, wanted;
168
169#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
170# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
171#else
172# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
173#endif
174
175#define LOCK(mutex) pthread_mutex_lock (&(mutex))
176#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
177
178/* worker threads management */
179static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
180
181typedef struct worker {
182 /* locked by wrklock */
183 struct worker *prev, *next;
184
185 pthread_t tid;
186
187 /* locked by reslock, reqlock or wrklock */
188 aio_req req; /* currently processed request */
189 void *dbuf;
190 DIR *dirp;
191} worker;
192
193static worker wrk_first = { &wrk_first, &wrk_first, 0 };
194
195static void worker_clear (worker *wrk)
196{
197 if (wrk->dirp)
198 {
199 closedir (wrk->dirp);
200 wrk->dirp = 0;
201 }
202
203 if (wrk->dbuf)
204 {
205 free (wrk->dbuf);
206 wrk->dbuf = 0;
207 }
208}
209
210static void worker_free (worker *wrk)
211{
212 wrk->next->prev = wrk->prev;
213 wrk->prev->next = wrk->next;
214
215 free (wrk);
216}
217
218static volatile unsigned int nreqs, nready, npending;
219static volatile unsigned int max_idle = 4;
220static volatile unsigned int max_outstanding = 0xffffffff;
61static int respipe [2]; 221static int respipe [2];
62 222
63static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 223static pthread_mutex_t reslock = AIO_MUTEX_INIT;
64static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 224static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
65static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 225static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66 226
67static volatile aio_req reqs, reqe; /* queue start, queue end */ 227#if WORDACCESS_UNSAFE
68static volatile aio_req ress, rese; /* queue start, queue end */
69 228
70static void 229static unsigned int get_nready ()
71poll_wait ()
72{ 230{
73 if (!nreqs) 231 unsigned int retval;
232
233 LOCK (reqlock);
234 retval = nready;
235 UNLOCK (reqlock);
236
237 return retval;
238}
239
240static unsigned int get_npending ()
241{
242 unsigned int retval;
243
244 LOCK (reslock);
245 retval = npending;
246 UNLOCK (reslock);
247
248 return retval;
249}
250
251static unsigned int get_nthreads ()
252{
253 unsigned int retval;
254
255 LOCK (wrklock);
256 retval = started;
257 UNLOCK (wrklock);
258
259 return retval;
260}
261
262#else
263
264# define get_nready() nready
265# define get_npending() npending
266# define get_nthreads() started
267
268#endif
269
270/*
271 * a somewhat faster data structure might be nice, but
272 * with 8 priorities this actually needs <20 insns
273 * per shift, the most expensive operation.
274 */
275typedef struct {
276 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
277 int size;
278} reqq;
279
280static reqq req_queue;
281static reqq res_queue;
282
283int reqq_push (reqq *q, aio_req req)
284{
285 int pri = req->pri;
286 req->next = 0;
287
288 if (q->qe[pri])
289 {
290 q->qe[pri]->next = req;
291 q->qe[pri] = req;
292 }
293 else
294 q->qe[pri] = q->qs[pri] = req;
295
296 return q->size++;
297}
298
299aio_req reqq_shift (reqq *q)
300{
301 int pri;
302
303 if (!q->size)
74 return; 304 return 0;
75 305
76 fd_set rfd; 306 --q->size;
77 FD_ZERO(&rfd);
78 FD_SET(respipe [0], &rfd);
79 307
80 select (respipe [0] + 1, &rfd, 0, 0, 0); 308 for (pri = NUM_PRI; pri--; )
81} 309 {
310 aio_req req = q->qs[pri];
82 311
83static int 312 if (req)
84poll_cb () 313 {
314 if (!(q->qs[pri] = req->next))
315 q->qe[pri] = 0;
316
317 return req;
318 }
319 }
320
321 abort ();
322}
323
324static int poll_cb ();
325static void req_invoke (aio_req req);
326static void req_free (aio_req req);
327static void req_cancel (aio_req req);
328
329/* must be called at most once */
330static SV *req_sv (aio_req req, const char *klass)
331{
332 if (!req->self)
333 {
334 req->self = (SV *)newHV ();
335 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
336 }
337
338 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
339}
340
341static aio_req SvAIO_REQ (SV *sv)
342{
343 MAGIC *mg;
344
345 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
346 croak ("object of class " AIO_REQ_KLASS " expected");
347
348 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
349
350 return mg ? (aio_req)mg->mg_ptr : 0;
351}
352
353static void aio_grp_feed (aio_req grp)
354{
355 while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
356 {
357 int old_len = grp->size;
358
359 if (grp->sv2 && SvOK (grp->sv2))
360 {
361 dSP;
362
363 ENTER;
364 SAVETMPS;
365 PUSHMARK (SP);
366 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
367 PUTBACK;
368 call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
369 SPAGAIN;
370 FREETMPS;
371 LEAVE;
372 }
373
374 /* stop if no progress has been made */
375 if (old_len == grp->size)
376 {
377 SvREFCNT_dec (grp->sv2);
378 grp->sv2 = 0;
379 break;
380 }
381 }
382}
383
384static void aio_grp_dec (aio_req grp)
385{
386 --grp->size;
387
388 /* call feeder, if applicable */
389 aio_grp_feed (grp);
390
391 /* finish, if done */
392 if (!grp->size && grp->int1)
393 {
394 req_invoke (grp);
395 req_free (grp);
396 }
397}
398
399static void req_invoke (aio_req req)
85{ 400{
86 dSP; 401 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 }
96 402
97 for (;;) 403 if (req->flags & FLAG_SV1_RO_OFF)
404 SvREADONLY_off (req->sv1);
405
406 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
98 { 407 {
99 pthread_mutex_lock (&reslock); 408 ENTER;
409 SAVETMPS;
410 PUSHMARK (SP);
411 EXTEND (SP, 1);
100 412
101 req = ress; 413 switch (req->type)
102
103 if (ress)
104 { 414 {
105 ress = ress->next; 415 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 { 416 {
132 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 417 SV *rv = &PL_sv_undef;
133 PL_laststatval = req->result;
134 PL_statcache = *(req->statdata);
135 418
136 Safefree (req->statdata); 419 if (req->result >= 0)
420 {
421 int i;
422 char *buf = req->ptr2;
423 AV *av = newAV ();
424
425 av_extend (av, req->result - 1);
426
427 for (i = 0; i < req->result; ++i)
428 {
429 SV *sv = newSVpv (buf, 0);
430
431 av_store (av, i, sv);
432 buf += SvCUR (sv) + 1;
433 }
434
435 rv = sv_2mortal (newRV_noinc ((SV *)av));
436 }
437
438 PUSHs (rv);
137 } 439 }
440 break;
138 441
139 PUSHMARK (SP); 442 case REQ_OPEN:
140 XPUSHs (sv_2mortal (newSViv (req->result)));
141
142 if (req->type == REQ_OPEN)
143 { 443 {
144 /* convert fd to fh */ 444 /* convert fd to fh */
145 SV *fh; 445 SV *fh;
146 446
447 PUSHs (sv_2mortal (newSViv (req->result)));
147 PUTBACK; 448 PUTBACK;
148 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 449 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
149 SPAGAIN; 450 SPAGAIN;
150 451
151 fh = POPs; 452 fh = SvREFCNT_inc (POPs);
152 453
153 PUSHMARK (SP); 454 PUSHMARK (SP);
154 XPUSHs (fh); 455 XPUSHs (sv_2mortal (fh));
155 } 456 }
457 break;
156 458
157 if (SvOK (req->callback)) 459 case REQ_GROUP:
460 req->int1 = 2; /* mark group as finished */
461
462 if (req->sv1)
158 { 463 {
159 PUTBACK; 464 int i;
160 call_sv (req->callback, G_VOID | G_EVAL); 465 AV *av = (AV *)req->sv1;
161 SPAGAIN; 466
467 EXTEND (SP, AvFILL (av) + 1);
468 for (i = 0; i <= AvFILL (av); ++i)
469 PUSHs (*av_fetch (av, i, 0));
162 } 470 }
471 break;
472
473 case REQ_NOP:
474 case REQ_BUSY:
475 break;
476
477 case REQ_READLINK:
478 if (req->result > 0)
163 479 {
164 if (req->callback) 480 SvCUR_set (req->sv1, req->result);
165 SvREFCNT_dec (req->callback); 481 *SvEND (req->sv1) = 0;
482 PUSHs (req->sv1);
483 }
484 break;
166 485
167 errno = errorno; 486 case REQ_STAT:
168 count++; 487 case REQ_LSTAT:
488 case REQ_FSTAT:
489 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
490 PL_laststatval = req->result;
491 PL_statcache = *(Stat_t *)(req->ptr2);
492 PUSHs (sv_2mortal (newSViv (req->result)));
493 break;
494
495 case REQ_READ:
496 SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
497 *SvEND (req->sv1) = 0;
498 PUSHs (sv_2mortal (newSViv (req->result)));
499 break;
500
501 default:
502 PUSHs (sv_2mortal (newSViv (req->result)));
503 break;
169 } 504 }
170 505
171 Safefree (req); 506 errno = req->errorno;
507
508 PUTBACK;
509 call_sv (req->callback, G_VOID | G_EVAL);
510 SPAGAIN;
511
512 FREETMPS;
513 LEAVE;
172 } 514 }
173 515
174 return count; 516 if (req->grp)
517 {
518 aio_req grp = req->grp;
519
520 /* unlink request */
521 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
522 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
523
524 if (grp->grp_first == req)
525 grp->grp_first = req->grp_next;
526
527 aio_grp_dec (grp);
528 }
529
530 if (SvTRUE (ERRSV))
531 {
532 req_free (req);
533 croak (0);
534 }
535}
536
537static void req_free (aio_req req)
538{
539 if (req->self)
540 {
541 sv_unmagic (req->self, PERL_MAGIC_ext);
542 SvREFCNT_dec (req->self);
543 }
544
545 SvREFCNT_dec (req->fh);
546 SvREFCNT_dec (req->sv1);
547 SvREFCNT_dec (req->sv2);
548 SvREFCNT_dec (req->callback);
549
550 if (req->flags & FLAG_PTR2_FREE)
551 free (req->ptr2);
552
553 Safefree (req);
554}
555
556static void req_cancel_subs (aio_req grp)
557{
558 aio_req sub;
559
560 if (grp->type != REQ_GROUP)
561 return;
562
563 SvREFCNT_dec (grp->sv2);
564 grp->sv2 = 0;
565
566 for (sub = grp->grp_first; sub; sub = sub->grp_next)
567 req_cancel (sub);
568}
569
570static void req_cancel (aio_req req)
571{
572 req->flags |= FLAG_CANCELLED;
573
574 req_cancel_subs (req);
175} 575}
176 576
177static void *aio_proc(void *arg); 577static void *aio_proc(void *arg);
178 578
179static void
180start_thread (void) 579static void start_thread (void)
181{ 580{
182 sigset_t fullsigset, oldsigset; 581 sigset_t fullsigset, oldsigset;
183 pthread_t tid;
184 pthread_attr_t attr; 582 pthread_attr_t attr;
583
584 worker *wrk = calloc (1, sizeof (worker));
585
586 if (!wrk)
587 croak ("unable to allocate worker thread data");
185 588
186 pthread_attr_init (&attr); 589 pthread_attr_init (&attr);
187 pthread_attr_setstacksize (&attr, STACKSIZE); 590 pthread_attr_setstacksize (&attr, STACKSIZE);
188 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 591 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
592#ifdef PTHREAD_SCOPE_PROCESS
593 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
594#endif
189 595
190 sigfillset (&fullsigset); 596 sigfillset (&fullsigset);
597
598 LOCK (wrklock);
191 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); 599 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
192 600
193 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 601 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 { 602 {
210 reqe->next = req; 603 wrk->prev = &wrk_first;
211 reqe = req; 604 wrk->next = wrk_first.next;
605 wrk_first.next->prev = wrk;
606 wrk_first.next = wrk;
607 ++started;
212 } 608 }
213 else 609 else
214 reqe = reqs = req; 610 free (wrk);
215 611
612 sigprocmask (SIG_SETMASK, &oldsigset, 0);
613 UNLOCK (wrklock);
614}
615
616static void maybe_start_thread ()
617{
618 if (get_nthreads () >= wanted)
619 return;
620
621 /* todo: maybe use idle here, but might be less exact */
622 if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
623 return;
624
625 start_thread ();
626}
627
628static void req_send (aio_req req)
629{
630 ++nreqs;
631
632 LOCK (reqlock);
633 ++nready;
634 reqq_push (&req_queue, req);
216 pthread_cond_signal (&reqwait); 635 pthread_cond_signal (&reqwait);
217 pthread_mutex_unlock (&reqlock); 636 UNLOCK (reqlock);
218 637
219 while (nreqs > max_outstanding) 638 maybe_start_thread ();
639}
640
641static void end_thread (void)
642{
643 aio_req req;
644
645 Newz (0, req, 1, aio_cb);
646
647 req->type = REQ_QUIT;
648 req->pri = PRI_MAX + PRI_BIAS;
649
650 LOCK (reqlock);
651 reqq_push (&req_queue, req);
652 pthread_cond_signal (&reqwait);
653 UNLOCK (reqlock);
654
655 LOCK (wrklock);
656 --started;
657 UNLOCK (wrklock);
658}
659
660static void set_max_idle (int nthreads)
661{
662 if (WORDACCESS_UNSAFE) LOCK (reqlock);
663 max_idle = nthreads <= 0 ? 1 : nthreads;
664 if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
665}
666
667static void min_parallel (int nthreads)
668{
669 if (wanted < nthreads)
670 wanted = nthreads;
671}
672
673static void max_parallel (int nthreads)
674{
675 if (wanted > nthreads)
676 wanted = nthreads;
677
678 while (started > wanted)
679 end_thread ();
680}
681
682static void poll_wait ()
683{
684 fd_set rfd;
685
686 while (nreqs)
220 { 687 {
688 int size;
689 if (WORDACCESS_UNSAFE) LOCK (reslock);
690 size = res_queue.size;
691 if (WORDACCESS_UNSAFE) UNLOCK (reslock);
692
693 if (size)
694 return;
695
696 maybe_start_thread ();
697
698 FD_ZERO(&rfd);
699 FD_SET(respipe [0], &rfd);
700
701 select (respipe [0] + 1, &rfd, 0, 0, 0);
702 }
703}
704
705static int poll_cb ()
706{
707 dSP;
708 int count = 0;
709 int maxreqs = max_poll_reqs;
710 int do_croak = 0;
711 struct timeval tv_start, tv_now;
712 aio_req req;
713
714 if (max_poll_time)
715 gettimeofday (&tv_start, 0);
716
717 for (;;)
718 {
719 for (;;)
720 {
721 maybe_start_thread ();
722
723 LOCK (reslock);
724 req = reqq_shift (&res_queue);
725
726 if (req)
727 {
728 --npending;
729
730 if (!res_queue.size)
731 {
732 /* read any signals sent by the worker threads */
733 char buf [32];
734 while (read (respipe [0], buf, 32) == 32)
735 ;
736 }
737 }
738
739 UNLOCK (reslock);
740
741 if (!req)
742 break;
743
744 --nreqs;
745
746 if (req->type == REQ_GROUP && req->size)
747 {
748 req->int1 = 1; /* mark request as delayed */
749 continue;
750 }
751 else
752 {
753 req_invoke (req);
754
755 count++;
756 }
757
758 req_free (req);
759
760 if (maxreqs && !--maxreqs)
761 break;
762
763 if (max_poll_time)
764 {
765 gettimeofday (&tv_now, 0);
766
767 if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
768 break;
769 }
770 }
771
772 if (nreqs <= max_outstanding)
773 break;
774
221 poll_wait (); 775 poll_wait ();
222 poll_cb (); 776
777 ++maxreqs;
223 } 778 }
224}
225 779
226static void 780 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} 781}
235 782
236static void 783static void create_pipe ()
237read_write (int dowrite, int fd, off_t offset, size_t length,
238 SV *data, STRLEN dataoffset, SV *callback)
239{ 784{
240 aio_req req; 785 if (pipe (respipe))
241 STRLEN svlen; 786 croak ("unable to initialize result pipe");
242 char *svptr = SvPV (data, svlen);
243 787
244 SvUPGRADE (data, SVt_PV); 788 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
245 SvPOK_on (data); 789 croak ("cannot set result pipe to nonblocking mode");
246 790
247 if (dataoffset < 0) 791 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
248 dataoffset += svlen; 792 croak ("cannot set result pipe to nonblocking mode");
793}
249 794
250 if (dataoffset < 0 || dataoffset > svlen) 795/*****************************************************************************/
251 croak ("data offset outside of string"); 796/* work around various missing functions */
252 797
253 if (dowrite) 798#if !HAVE_PREADWRITE
799# define pread aio_pread
800# define pwrite aio_pwrite
801
802/*
803 * make our pread/pwrite safe against themselves, but not against
804 * normal read/write by using a mutex. slows down execution a lot,
805 * but that's your problem, not mine.
806 */
807static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
808
809static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
810{
811 ssize_t res;
812 off_t ooffset;
813
814 LOCK (preadwritelock);
815 ooffset = lseek (fd, 0, SEEK_CUR);
816 lseek (fd, offset, SEEK_SET);
817 res = read (fd, buf, count);
818 lseek (fd, ooffset, SEEK_SET);
819 UNLOCK (preadwritelock);
820
821 return res;
822}
823
824static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
825{
826 ssize_t res;
827 off_t ooffset;
828
829 LOCK (preadwritelock);
830 ooffset = lseek (fd, 0, SEEK_CUR);
831 lseek (fd, offset, SEEK_SET);
832 res = write (fd, buf, count);
833 lseek (fd, offset, SEEK_SET);
834 UNLOCK (preadwritelock);
835
836 return res;
837}
838#endif
839
840#if !HAVE_FDATASYNC
841# define fdatasync fsync
842#endif
843
844#if !HAVE_READAHEAD
845# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
846
847static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
848{
849 dBUF;
850
851 while (count > 0)
254 { 852 {
255 /* write: check length and adjust. */ 853 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
256 if (length < 0 || length + dataoffset > svlen) 854
257 length = svlen - dataoffset; 855 pread (fd, aio_buf, len, offset);
856 offset += len;
857 count -= len;
858 }
859
860 errno = 0;
861}
862
863#endif
864
865#if !HAVE_READDIR_R
866# define readdir_r aio_readdir_r
867
868static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
869
870static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
871{
872 struct dirent *e;
873 int errorno;
874
875 LOCK (readdirlock);
876
877 e = readdir (dirp);
878 errorno = errno;
879
880 if (e)
881 {
882 *res = ent;
883 strcpy (ent->d_name, e->d_name);
258 } 884 }
259 else 885 else
886 *res = 0;
887
888 UNLOCK (readdirlock);
889
890 errno = errorno;
891 return e ? 0 : -1;
892}
893#endif
894
895/* sendfile always needs emulation */
896static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
897{
898 ssize_t res;
899
900 if (!count)
901 return 0;
902
903#if HAVE_SENDFILE
904# if __linux
905 res = sendfile (ofd, ifd, &offset, count);
906
907# elif __freebsd
908 /*
909 * Of course, the freebsd sendfile is a dire hack with no thoughts
910 * wasted on making it similar to other I/O functions.
911 */
912 {
913 off_t sbytes;
914 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
915
916 if (res < 0 && sbytes)
917 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
918 res = sbytes;
919 }
920
921# elif __hpux
922 res = sendfile (ofd, ifd, offset, count, 0, 0);
923
924# elif __solaris
925 {
926 struct sendfilevec vec;
927 size_t sbytes;
928
929 vec.sfv_fd = ifd;
930 vec.sfv_flag = 0;
931 vec.sfv_off = offset;
932 vec.sfv_len = count;
933
934 res = sendfilev (ofd, &vec, 1, &sbytes);
935
936 if (res < 0 && sbytes)
937 res = sbytes;
938 }
939
940# endif
941#else
942 res = -1;
943 errno = ENOSYS;
944#endif
945
946 if (res < 0
947 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
948#if __solaris
949 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
950#endif
951 )
952 )
260 { 953 {
261 /* read: grow scalar as necessary */ 954 /* emulate sendfile. this is a major pain in the ass */
262 svptr = SvGROW (data, length + dataoffset); 955 dBUF;
956
957 res = 0;
958
959 while (count)
960 {
961 ssize_t cnt;
962
963 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
964
965 if (cnt <= 0)
966 {
967 if (cnt && !res) res = -1;
968 break;
969 }
970
971 cnt = write (ofd, aio_buf, cnt);
972
973 if (cnt <= 0)
974 {
975 if (cnt && !res) res = -1;
976 break;
977 }
978
979 offset += cnt;
980 res += cnt;
981 count -= cnt;
982 }
263 } 983 }
264 984
265 if (length < 0) 985 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} 986}
283 987
284static void * 988/* read a full directory */
989static void scandir_ (aio_req req, worker *self)
990{
991 DIR *dirp;
992 union
993 {
994 struct dirent d;
995 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
996 } *u;
997 struct dirent *entp;
998 char *name, *names;
999 int memlen = 4096;
1000 int memofs = 0;
1001 int res = 0;
1002 int errorno;
1003
1004 LOCK (wrklock);
1005 self->dirp = dirp = opendir (req->ptr1);
1006 self->dbuf = u = malloc (sizeof (*u));
1007 req->flags |= FLAG_PTR2_FREE;
1008 req->ptr2 = names = malloc (memlen);
1009 UNLOCK (wrklock);
1010
1011 if (dirp && u && names)
1012 for (;;)
1013 {
1014 errno = 0;
1015 readdir_r (dirp, &u->d, &entp);
1016
1017 if (!entp)
1018 break;
1019
1020 name = entp->d_name;
1021
1022 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1023 {
1024 int len = strlen (name) + 1;
1025
1026 res++;
1027
1028 while (memofs + len > memlen)
1029 {
1030 memlen *= 2;
1031 LOCK (wrklock);
1032 req->ptr2 = names = realloc (names, memlen);
1033 UNLOCK (wrklock);
1034
1035 if (!names)
1036 break;
1037 }
1038
1039 memcpy (names + memofs, name, len);
1040 memofs += len;
1041 }
1042 }
1043
1044 if (errno)
1045 res = -1;
1046
1047 req->result = res;
1048}
1049
1050/*****************************************************************************/
1051
285aio_proc (void *thr_arg) 1052static void *aio_proc (void *thr_arg)
286{ 1053{
287 aio_req req; 1054 aio_req req;
288 int type; 1055 struct timespec ts;
1056 worker *self = (worker *)thr_arg;
289 1057
290 do 1058 /* try to distribute timeouts somewhat evenly */
1059 ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1060 * (1000000000UL / 1024UL);
1061
1062 for (;;)
291 { 1063 {
292 pthread_mutex_lock (&reqlock); 1064 ts.tv_sec = time (0) + IDLE_TIMEOUT;
1065
1066 LOCK (reqlock);
293 1067
294 for (;;) 1068 for (;;)
295 { 1069 {
296 req = reqs; 1070 self->req = req = reqq_shift (&req_queue);
297
298 if (reqs)
299 {
300 reqs = reqs->next;
301 if (!reqs) reqe = 0;
302 }
303 1071
304 if (req) 1072 if (req)
305 break; 1073 break;
306 1074
1075 ++idle;
1076
1077 if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1078 == ETIMEDOUT)
1079 {
1080 if (idle > max_idle)
1081 {
1082 --idle;
1083 UNLOCK (reqlock);
1084 LOCK (wrklock);
1085 --started;
1086 UNLOCK (wrklock);
1087 goto quit;
1088 }
1089
1090 /* we are allowed to idle, so do so without any timeout */
307 pthread_cond_wait (&reqwait, &reqlock); 1091 pthread_cond_wait (&reqwait, &reqlock);
1092 ts.tv_sec = time (0) + IDLE_TIMEOUT;
1093 }
1094
1095 --idle;
308 } 1096 }
309 1097
310 pthread_mutex_unlock (&reqlock); 1098 --nready;
1099
1100 UNLOCK (reqlock);
311 1101
312 errno = 0; /* strictly unnecessary */ 1102 errno = 0; /* strictly unnecessary */
313 1103
314 type = req->type; 1104 if (!(req->flags & FLAG_CANCELLED))
315
316 switch (type) 1105 switch (req->type)
317 { 1106 {
318 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; 1107 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; 1108 case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
320#if SYS_readahead 1109
321 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 1110 case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
322#else 1111 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; 1112
1113 case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1114 case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1115 case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1116
1117 case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1118 case REQ_CLOSE: req->result = close (req->int1); break;
1119 case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1120 case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1121 case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1122 case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1123 case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1124 case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1125 case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1126
1127 case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1128 case REQ_FSYNC: req->result = fsync (req->int1); break;
1129 case REQ_READDIR: scandir_ (req, self); break;
1130
1131 case REQ_BUSY:
1132 {
1133 struct timeval tv;
1134
1135 tv.tv_sec = req->int1;
1136 tv.tv_usec = req->int2;
1137
1138 req->result = select (0, 0, 0, 0, &tv);
1139 }
1140
1141 case REQ_GROUP:
1142 case REQ_NOP:
1143 break;
1144
1145 case REQ_QUIT:
1146 goto quit;
1147
1148 default:
1149 req->result = ENOSYS;
1150 break;
1151 }
1152
1153 req->errorno = errno;
1154
1155 LOCK (reslock);
1156
1157 ++npending;
1158
1159 if (!reqq_push (&res_queue, req))
1160 /* write a dummy byte to the pipe so fh becomes ready */
1161 write (respipe [1], &respipe, 1);
1162
1163 self->req = 0;
1164 worker_clear (self);
1165
1166 UNLOCK (reslock);
1167 }
1168
1169quit:
1170 LOCK (wrklock);
1171 worker_free (self);
1172 UNLOCK (wrklock);
1173
1174 return 0;
1175}
1176
1177/*****************************************************************************/
1178
1179static void atfork_prepare (void)
1180{
1181 LOCK (wrklock);
1182 LOCK (reqlock);
1183 LOCK (reslock);
1184#if !HAVE_PREADWRITE
1185 LOCK (preadwritelock);
324#endif 1186#endif
1187#if !HAVE_READDIR_R
1188 LOCK (readdirlock);
1189#endif
1190}
325 1191
326 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 1192static void atfork_parent (void)
327 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 1193{
328 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 1194#if !HAVE_READDIR_R
1195 UNLOCK (readdirlock);
1196#endif
1197#if !HAVE_PREADWRITE
1198 UNLOCK (preadwritelock);
1199#endif
1200 UNLOCK (reslock);
1201 UNLOCK (reqlock);
1202 UNLOCK (wrklock);
1203}
329 1204
330 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 1205static void atfork_child (void)
331 case REQ_CLOSE: req->result = close (req->fd); break; 1206{
332 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 1207 aio_req prv;
333 1208
334 case REQ_FSYNC: req->result = fsync (req->fd); break; 1209 while (prv = reqq_shift (&req_queue))
335 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 1210 req_free (prv);
336 1211
337 case REQ_QUIT: 1212 while (prv = reqq_shift (&res_queue))
338 break; 1213 req_free (prv);
339 1214
340 default: 1215 while (wrk_first.next != &wrk_first)
341 req->result = ENOSYS; 1216 {
342 break; 1217 worker *wrk = wrk_first.next;
343 }
344 1218
345 req->errorno = errno;
346
347 pthread_mutex_lock (&reslock);
348
349 req->next = 0;
350
351 if (rese) 1219 if (wrk->req)
352 { 1220 req_free (wrk->req);
353 rese->next = req;
354 rese = req;
355 }
356 else
357 {
358 rese = ress = req;
359 1221
360 /* write a dummy byte to the pipe so fh becomes ready */ 1222 worker_clear (wrk);
361 write (respipe [1], &respipe, 1); 1223 worker_free (wrk);
362 }
363
364 pthread_mutex_unlock (&reslock);
365 } 1224 }
366 while (type != REQ_QUIT);
367 1225
368 return 0; 1226 started = 0;
369} 1227 idle = 0;
1228 nreqs = 0;
1229 nready = 0;
1230 npending = 0;
370 1231
1232 close (respipe [0]);
1233 close (respipe [1]);
1234 create_pipe ();
1235
1236 atfork_parent ();
1237}
1238
1239#define dREQ \
1240 aio_req req; \
1241 int req_pri = next_pri; \
1242 next_pri = DEFAULT_PRI + PRI_BIAS; \
1243 \
1244 if (SvOK (callback) && !SvROK (callback)) \
1245 croak ("callback must be undef or of reference type"); \
1246 \
1247 Newz (0, req, 1, aio_cb); \
1248 if (!req) \
1249 croak ("out of memory during aio_req allocation"); \
1250 \
1251 req->callback = newSVsv (callback); \
1252 req->pri = req_pri
1253
1254#define REQ_SEND \
1255 req_send (req); \
1256 \
1257 if (GIMME_V != G_VOID) \
1258 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1259
371MODULE = IO::AIO PACKAGE = IO::AIO 1260MODULE = IO::AIO PACKAGE = IO::AIO
372 1261
373PROTOTYPES: ENABLE 1262PROTOTYPES: ENABLE
374 1263
375BOOT: 1264BOOT:
376{ 1265{
377 if (pipe (respipe)) 1266 HV *stash = gv_stashpv ("IO::AIO", 1);
378 croak ("unable to initialize result pipe");
379 1267
380 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1268 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
381 croak ("cannot set result pipe to nonblocking mode"); 1269 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1270 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1271 newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1272 newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1273 newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
382 1274
383 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 1275 create_pipe ();
384 croak ("cannot set result pipe to nonblocking mode"); 1276 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
385} 1277}
386 1278
387void 1279void
388min_parallel(nthreads) 1280max_poll_reqs (int nreqs)
389 int nthreads
390 PROTOTYPE: $ 1281 PROTOTYPE: $
391 CODE: 1282 CODE:
392 while (nthreads > started) 1283 max_poll_reqs = nreqs;
393 start_thread ();
394 1284
395void 1285void
396max_parallel(nthreads) 1286max_poll_time (double nseconds)
397 int nthreads
398 PROTOTYPE: $ 1287 PROTOTYPE: $
399 CODE: 1288 CODE:
400{ 1289 max_poll_time = nseconds * AIO_TICKS;
401 int cur = started;
402 while (cur > nthreads)
403 {
404 end_thread ();
405 cur--;
406 }
407 1290
408 while (started > nthreads) 1291void
409 { 1292min_parallel (int nthreads)
410 poll_wait (); 1293 PROTOTYPE: $
411 poll_cb (); 1294
412 } 1295void
413} 1296max_parallel (int nthreads)
1297 PROTOTYPE: $
1298
1299void
1300max_idle (int nthreads)
1301 PROTOTYPE: $
1302 CODE:
1303 set_max_idle (nthreads);
414 1304
415int 1305int
416max_outstanding(nreqs) 1306max_outstanding (int maxreqs)
417 int nreqs 1307 PROTOTYPE: $
418 PROTOTYPE: $
419 CODE: 1308 CODE:
420 RETVAL = max_outstanding; 1309 RETVAL = max_outstanding;
421 max_outstanding = nreqs; 1310 max_outstanding = maxreqs;
1311 OUTPUT:
1312 RETVAL
422 1313
423void 1314void
424aio_open(pathname,flags,mode,callback=&PL_sv_undef) 1315aio_open (pathname,flags,mode,callback=&PL_sv_undef)
425 SV * pathname 1316 SV8 * pathname
426 int flags 1317 int flags
427 int mode 1318 int mode
428 SV * callback 1319 SV * callback
429 PROTOTYPE: $$$;$ 1320 PROTOTYPE: $$$;$
430 CODE: 1321 PPCODE:
431{ 1322{
432 aio_req req; 1323 dREQ;
433
434 Newz (0, req, 1, aio_cb);
435
436 if (!req)
437 croak ("out of memory during aio_req allocation");
438 1324
439 req->type = REQ_OPEN; 1325 req->type = REQ_OPEN;
440 req->data = newSVsv (pathname); 1326 req->sv1 = newSVsv (pathname);
441 req->dataptr = SvPV_nolen (req->data); 1327 req->ptr1 = SvPVbyte_nolen (req->sv1);
442 req->fd = flags; 1328 req->int1 = flags;
443 req->mode = mode; 1329 req->mode = mode;
444 req->callback = SvREFCNT_inc (callback);
445 1330
446 send_req (req); 1331 REQ_SEND;
447} 1332}
448 1333
449void 1334void
450aio_close(fh,callback=&PL_sv_undef) 1335aio_close (fh,callback=&PL_sv_undef)
451 InputStream fh 1336 SV * fh
452 SV * callback 1337 SV * callback
453 PROTOTYPE: $;$ 1338 PROTOTYPE: $;$
454 ALIAS: 1339 ALIAS:
455 aio_close = REQ_CLOSE 1340 aio_close = REQ_CLOSE
456 aio_fsync = REQ_FSYNC 1341 aio_fsync = REQ_FSYNC
457 aio_fdatasync = REQ_FDATASYNC 1342 aio_fdatasync = REQ_FDATASYNC
458 CODE: 1343 PPCODE:
459{ 1344{
460 aio_req req; 1345 dREQ;
461
462 Newz (0, req, 1, aio_cb);
463
464 if (!req)
465 croak ("out of memory during aio_req allocation");
466 1346
467 req->type = ix; 1347 req->type = ix;
1348 req->fh = newSVsv (fh);
468 req->fd = PerlIO_fileno (fh); 1349 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
469 req->callback = SvREFCNT_inc (callback);
470 1350
471 send_req (req); 1351 REQ_SEND (req);
472} 1352}
473 1353
474void 1354void
475aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 1355aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
476 InputStream fh 1356 SV * fh
477 UV offset 1357 UV offset
478 IV length 1358 UV length
479 SV * data 1359 SV8 * data
480 IV dataoffset 1360 UV dataoffset
481 SV * callback 1361 SV * callback
1362 ALIAS:
1363 aio_read = REQ_READ
1364 aio_write = REQ_WRITE
482 PROTOTYPE: $$$$$;$ 1365 PROTOTYPE: $$$$$;$
483 CODE: 1366 PPCODE:
484 read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
485
486void
487aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
488 OutputStream fh
489 UV offset
490 IV length
491 SV * data
492 IV dataoffset
493 SV * callback
494 PROTOTYPE: $$$$$;$
495 CODE:
496 read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
497
498void
499aio_readahead(fh,offset,length,callback=&PL_sv_undef)
500 InputStream fh
501 UV offset
502 IV length
503 SV * callback
504 PROTOTYPE: $$$;$
505 CODE:
506{ 1367{
507 aio_req req; 1368 STRLEN svlen;
1369 char *svptr = SvPVbyte (data, svlen);
1370
1371 SvUPGRADE (data, SVt_PV);
1372 SvPOK_on (data);
1373
1374 if (dataoffset < 0)
1375 dataoffset += svlen;
1376
1377 if (dataoffset < 0 || dataoffset > svlen)
1378 croak ("data offset outside of string");
1379
1380 if (ix == REQ_WRITE)
1381 {
1382 /* write: check length and adjust. */
1383 if (length < 0 || length + dataoffset > svlen)
1384 length = svlen - dataoffset;
1385 }
1386 else
1387 {
1388 /* read: grow scalar as necessary */
1389 svptr = SvGROW (data, length + dataoffset);
1390 }
508 1391
509 if (length < 0) 1392 if (length < 0)
510 croak ("length must not be negative"); 1393 croak ("length must not be negative");
511 1394
512 Newz (0, req, 1, aio_cb); 1395 {
1396 dREQ;
513 1397
514 if (!req) 1398 req->type = ix;
515 croak ("out of memory during aio_req allocation"); 1399 req->fh = newSVsv (fh);
1400 req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1401 : IoOFP (sv_2io (fh)));
1402 req->offs = offset;
1403 req->size = length;
1404 req->sv1 = SvREFCNT_inc (data);
1405 req->ptr1 = (char *)svptr + dataoffset;
1406 req->stroffset = dataoffset;
1407
1408 if (!SvREADONLY (data))
1409 {
1410 SvREADONLY_on (data);
1411 req->flags |= FLAG_SV1_RO_OFF;
1412 }
1413
1414 REQ_SEND;
1415 }
1416}
1417
1418void
1419aio_readlink (path,callback=&PL_sv_undef)
1420 SV8 * path
1421 SV * callback
1422 PROTOTYPE: $$;$
1423 PPCODE:
1424{
1425 SV *data;
1426 dREQ;
1427
1428 data = newSV (NAME_MAX);
1429 SvPOK_on (data);
1430
1431 req->type = REQ_READLINK;
1432 req->fh = newSVsv (path);
1433 req->ptr2 = SvPVbyte_nolen (req->fh);
1434 req->sv1 = data;
1435 req->ptr1 = SvPVbyte_nolen (data);
1436
1437 REQ_SEND;
1438}
1439
1440void
1441aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1442 SV * out_fh
1443 SV * in_fh
1444 UV in_offset
1445 UV length
1446 SV * callback
1447 PROTOTYPE: $$$$;$
1448 PPCODE:
1449{
1450 dREQ;
1451
1452 req->type = REQ_SENDFILE;
1453 req->fh = newSVsv (out_fh);
1454 req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1455 req->sv2 = newSVsv (in_fh);
1456 req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1457 req->offs = in_offset;
1458 req->size = length;
1459
1460 REQ_SEND;
1461}
1462
1463void
1464aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1465 SV * fh
1466 UV offset
1467 IV length
1468 SV * callback
1469 PROTOTYPE: $$$;$
1470 PPCODE:
1471{
1472 dREQ;
516 1473
517 req->type = REQ_READAHEAD; 1474 req->type = REQ_READAHEAD;
1475 req->fh = newSVsv (fh);
518 req->fd = PerlIO_fileno (fh); 1476 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
519 req->offset = offset; 1477 req->offs = offset;
520 req->length = length; 1478 req->size = length;
521 req->callback = SvREFCNT_inc (callback);
522 1479
523 send_req (req); 1480 REQ_SEND;
524} 1481}
525 1482
526void 1483void
527aio_stat(fh_or_path,callback=&PL_sv_undef) 1484aio_stat (fh_or_path,callback=&PL_sv_undef)
528 SV * fh_or_path 1485 SV8 * fh_or_path
529 SV * callback 1486 SV * callback
530 ALIAS: 1487 ALIAS:
531 aio_stat = REQ_STAT 1488 aio_stat = REQ_STAT
532 aio_lstat = REQ_LSTAT 1489 aio_lstat = REQ_LSTAT
533 CODE: 1490 PPCODE:
534{ 1491{
535 aio_req req; 1492 dREQ;
536 1493
537 Newz (0, req, 1, aio_cb); 1494 req->ptr2 = malloc (sizeof (Stat_t));
538
539 if (!req) 1495 if (!req->ptr2)
540 croak ("out of memory during aio_req allocation"); 1496 {
541 1497 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"); 1498 croak ("out of memory during aio_stat statdata allocation");
1499 }
1500
1501 req->flags |= FLAG_PTR2_FREE;
546 1502
547 if (SvPOK (fh_or_path)) 1503 if (SvPOK (fh_or_path))
548 { 1504 {
549 req->type = ix; 1505 req->type = ix;
550 req->data = newSVsv (fh_or_path); 1506 req->sv1 = newSVsv (fh_or_path);
551 req->dataptr = SvPV_nolen (req->data); 1507 req->ptr1 = SvPVbyte_nolen (req->sv1);
552 } 1508 }
553 else 1509 else
554 { 1510 {
555 req->type = REQ_FSTAT; 1511 req->type = REQ_FSTAT;
1512 req->fh = newSVsv (fh_or_path);
556 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1513 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
557 } 1514 }
558 1515
559 req->callback = SvREFCNT_inc (callback); 1516 REQ_SEND;
560
561 send_req (req);
562} 1517}
563 1518
564void 1519void
565aio_unlink(pathname,callback=&PL_sv_undef) 1520aio_unlink (pathname,callback=&PL_sv_undef)
566 SV * pathname 1521 SV8 * pathname
567 SV * callback 1522 SV * callback
1523 ALIAS:
1524 aio_unlink = REQ_UNLINK
1525 aio_rmdir = REQ_RMDIR
1526 aio_readdir = REQ_READDIR
1527 PPCODE:
1528{
1529 dREQ;
1530
1531 req->type = ix;
1532 req->sv1 = newSVsv (pathname);
1533 req->ptr1 = SvPVbyte_nolen (req->sv1);
1534
1535 REQ_SEND;
1536}
1537
1538void
1539aio_link (oldpath,newpath,callback=&PL_sv_undef)
1540 SV8 * oldpath
1541 SV8 * newpath
1542 SV * callback
1543 ALIAS:
1544 aio_link = REQ_LINK
1545 aio_symlink = REQ_SYMLINK
1546 aio_rename = REQ_RENAME
1547 PPCODE:
1548{
1549 dREQ;
1550
1551 req->type = ix;
1552 req->fh = newSVsv (oldpath);
1553 req->ptr2 = SvPVbyte_nolen (req->fh);
1554 req->sv1 = newSVsv (newpath);
1555 req->ptr1 = SvPVbyte_nolen (req->sv1);
1556
1557 REQ_SEND;
1558}
1559
1560void
1561aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1562 SV8 * pathname
1563 SV * callback
1564 UV mode
1565 UV dev
1566 PPCODE:
1567{
1568 dREQ;
1569
1570 req->type = REQ_MKNOD;
1571 req->sv1 = newSVsv (pathname);
1572 req->ptr1 = SvPVbyte_nolen (req->sv1);
1573 req->mode = (mode_t)mode;
1574 req->offs = dev;
1575
1576 REQ_SEND;
1577}
1578
1579void
1580aio_busy (delay,callback=&PL_sv_undef)
1581 double delay
1582 SV * callback
1583 PPCODE:
1584{
1585 dREQ;
1586
1587 req->type = REQ_BUSY;
1588 req->int1 = delay < 0. ? 0 : delay;
1589 req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1590
1591 REQ_SEND;
1592}
1593
1594void
1595aio_group (callback=&PL_sv_undef)
1596 SV * callback
1597 PROTOTYPE: ;$
1598 PPCODE:
1599{
1600 dREQ;
1601
1602 req->type = REQ_GROUP;
1603
1604 req_send (req);
1605 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1606}
1607
1608void
1609aio_nop (callback=&PL_sv_undef)
1610 SV * callback
1611 PPCODE:
1612{
1613 dREQ;
1614
1615 req->type = REQ_NOP;
1616
1617 REQ_SEND;
1618}
1619
1620int
1621aioreq_pri (int pri = 0)
1622 PROTOTYPE: ;$
568 CODE: 1623 CODE:
569{ 1624 RETVAL = next_pri - PRI_BIAS;
570 aio_req req; 1625 if (items > 0)
571 1626 {
572 Newz (0, req, 1, aio_cb); 1627 if (pri < PRI_MIN) pri = PRI_MIN;
573 1628 if (pri > PRI_MAX) pri = PRI_MAX;
574 if (!req) 1629 next_pri = pri + PRI_BIAS;
575 croak ("out of memory during aio_req allocation"); 1630 }
576 1631 OUTPUT:
577 req->type = REQ_UNLINK; 1632 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 1633
585void 1634void
1635aioreq_nice (int nice = 0)
1636 CODE:
1637 nice = next_pri - nice;
1638 if (nice < PRI_MIN) nice = PRI_MIN;
1639 if (nice > PRI_MAX) nice = PRI_MAX;
1640 next_pri = nice + PRI_BIAS;
1641
1642void
586flush() 1643flush ()
587 PROTOTYPE: 1644 PROTOTYPE:
588 CODE: 1645 CODE:
589 while (nreqs) 1646 while (nreqs)
590 { 1647 {
591 poll_wait (); 1648 poll_wait ();
592 poll_cb (); 1649 poll_cb (0);
593 } 1650 }
594 1651
595void 1652void
596poll() 1653poll()
597 PROTOTYPE: 1654 PROTOTYPE:
598 CODE: 1655 CODE:
599 if (nreqs) 1656 if (nreqs)
600 { 1657 {
601 poll_wait (); 1658 poll_wait ();
602 poll_cb (); 1659 poll_cb (0);
603 } 1660 }
604 1661
605int 1662int
606poll_fileno() 1663poll_fileno()
607 PROTOTYPE: 1664 PROTOTYPE:
… …
631 CODE: 1688 CODE:
632 RETVAL = nreqs; 1689 RETVAL = nreqs;
633 OUTPUT: 1690 OUTPUT:
634 RETVAL 1691 RETVAL
635 1692
1693int
1694nready()
1695 PROTOTYPE:
1696 CODE:
1697 RETVAL = get_nready ();
1698 OUTPUT:
1699 RETVAL
1700
1701int
1702npending()
1703 PROTOTYPE:
1704 CODE:
1705 RETVAL = get_npending ();
1706 OUTPUT:
1707 RETVAL
1708
1709int
1710nthreads()
1711 PROTOTYPE:
1712 CODE:
1713 if (WORDACCESS_UNSAFE) LOCK (wrklock);
1714 RETVAL = started;
1715 if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1716 OUTPUT:
1717 RETVAL
1718
1719PROTOTYPES: DISABLE
1720
1721MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1722
1723void
1724cancel (aio_req_ornot req)
1725 CODE:
1726 req_cancel (req);
1727
1728void
1729cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1730 CODE:
1731 SvREFCNT_dec (req->callback);
1732 req->callback = newSVsv (callback);
1733
1734MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1735
1736void
1737add (aio_req grp, ...)
1738 PPCODE:
1739{
1740 int i;
1741 aio_req req;
1742
1743 if (grp->int1 == 2)
1744 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1745
1746 for (i = 1; i < items; ++i )
1747 {
1748 if (GIMME_V != G_VOID)
1749 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1750
1751 req = SvAIO_REQ (ST (i));
1752
1753 if (req)
1754 {
1755 ++grp->size;
1756 req->grp = grp;
1757
1758 req->grp_prev = 0;
1759 req->grp_next = grp->grp_first;
1760
1761 if (grp->grp_first)
1762 grp->grp_first->grp_prev = req;
1763
1764 grp->grp_first = req;
1765 }
1766 }
1767}
1768
1769void
1770cancel_subs (aio_req_ornot req)
1771 CODE:
1772 req_cancel_subs (req);
1773
1774void
1775result (aio_req grp, ...)
1776 CODE:
1777{
1778 int i;
1779 AV *av;
1780
1781 grp->errorno = errno;
1782
1783 av = newAV ();
1784
1785 for (i = 1; i < items; ++i )
1786 av_push (av, newSVsv (ST (i)));
1787
1788 SvREFCNT_dec (grp->sv1);
1789 grp->sv1 = (SV *)av;
1790}
1791
1792void
1793errno (aio_req grp, int errorno = errno)
1794 CODE:
1795 grp->errorno = errorno;
1796
1797void
1798limit (aio_req grp, int limit)
1799 CODE:
1800 grp->int2 = limit;
1801 aio_grp_feed (grp);
1802
1803void
1804feed (aio_req grp, SV *callback=&PL_sv_undef)
1805 CODE:
1806{
1807 SvREFCNT_dec (grp->sv2);
1808 grp->sv2 = newSVsv (callback);
1809
1810 if (grp->int2 <= 0)
1811 grp->int2 = 2;
1812
1813 aio_grp_feed (grp);
1814}
1815

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