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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.2 by root, Sun Jul 10 18:16:49 2005 UTC vs.
Revision 1.77 by root, Thu Oct 26 13:25:40 2006 UTC

1#define PERL_NO_GET_CONTEXT 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>
2 12
3#include "EXTERN.h" 13#include "EXTERN.h"
4#include "perl.h" 14#include "perl.h"
5#include "XSUB.h" 15#include "XSUB.h"
6 16
17#include "autoconf/config.h"
18
19#include <pthread.h>
20
21#include <stddef.h>
22#include <errno.h>
23#include <sys/time.h>
24#include <sys/select.h>
7#include <sys/types.h> 25#include <sys/types.h>
8#include <sys/stat.h> 26#include <sys/stat.h>
27#include <limits.h>
9#include <unistd.h> 28#include <unistd.h>
10#include <fcntl.h> 29#include <fcntl.h>
11#include <signal.h> 30#include <signal.h>
12#include <sched.h> 31#include <sched.h>
13#include <endian.h>
14 32
15#include <pthread.h> 33#if HAVE_SENDFILE
34# if __linux
35# include <sys/sendfile.h>
36# elif __freebsd
16#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
46#endif
17 47
18typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 48/* used for struct dirent, AIX doesn't provide it */
19typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 49#ifndef NAME_MAX
20typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 50# define NAME_MAX 4096
51#endif
21 52
22#if __i386 || __amd64 53#ifndef PTHREAD_STACK_MIN
23# define STACKSIZE ( 256 * sizeof (long)) 54/* care for broken platforms, e.g. windows */
55# define PTHREAD_STACK_MIN 16384
56#endif
57
24#elif __ia64 58#if __ia64
25# define STACKSIZE (8192 * sizeof (long)) 59# define STACKSIZE 65536
60#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
61# define STACKSIZE PTHREAD_STACK_MIN
26#else 62#else
27# define STACKSIZE ( 512 * sizeof (long)) 63# define STACKSIZE 16384
28#endif 64#endif
65
66/* buffer size for various temporary buffers */
67#define AIO_BUFSIZE 65536
68
69#define dBUF \
70 char *aio_buf; \
71 LOCK (wrklock); \
72 self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
73 UNLOCK (wrklock); \
74 if (!aio_buf) \
75 return -1;
29 76
30enum { 77enum {
31 REQ_QUIT, 78 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 79 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 80 REQ_READ, REQ_WRITE, REQ_READAHEAD,
81 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 82 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 83 REQ_FSYNC, REQ_FDATASYNC,
84 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
85 REQ_READDIR,
86 REQ_LINK, REQ_SYMLINK,
87 REQ_GROUP, REQ_NOP,
88 REQ_BUSY,
36}; 89};
37 90
91#define AIO_REQ_KLASS "IO::AIO::REQ"
92#define AIO_GRP_KLASS "IO::AIO::GRP"
93
38typedef struct aio_cb { 94typedef struct aio_cb
95{
39 struct aio_cb *next; 96 struct aio_cb *volatile next;
40 97
41 int type; 98 SV *data, *callback;
42 99 SV *fh, *fh2;
43 int fd; 100 void *dataptr, *data2ptr;
101 Stat_t *statdata;
44 off_t offset; 102 off_t offset;
45 size_t length; 103 size_t length;
46 ssize_t result; 104 ssize_t result;
105
106 STRLEN dataoffset;
107 int type;
108 int fd, fd2;
109 int errorno;
47 mode_t mode; /* open */ 110 mode_t mode; /* open */
48 int errorno;
49 SV *data, *callback;
50 void *dataptr;
51 STRLEN dataoffset;
52 111
53 Stat_t *statdata; 112 unsigned char flags;
113 unsigned char pri;
114
115 SV *self; /* the perl counterpart of this request, if any */
116 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
54} aio_cb; 117} aio_cb;
55 118
119enum {
120 FLAG_CANCELLED = 0x01,
121};
122
56typedef aio_cb *aio_req; 123typedef aio_cb *aio_req;
124typedef aio_cb *aio_req_ornot;
57 125
126enum {
127 PRI_MIN = -4,
128 PRI_MAX = 4,
129
130 DEFAULT_PRI = 0,
131 PRI_BIAS = -PRI_MIN,
132 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
133};
134
135static int next_pri = DEFAULT_PRI + PRI_BIAS;
136
58static int started; 137static int started, wanted;
59static int nreqs; 138static volatile int nreqs;
60static int reqpipe[2], respipe[2]; 139static int respipe [2];
61 140
62static aio_req qs, qe; /* queue start, queue end */ 141#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
142# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
143#else
144# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
145#endif
63 146
64static void *aio_proc(void *arg); 147#define LOCK(mutex) pthread_mutex_lock (&(mutex))
148#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
65 149
66static void 150/* worker threads management */
67start_thread (void) 151static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
68{ 152
69 sigset_t fullsigset, oldsigset; 153typedef struct worker {
154 /* locked by wrklock */
155 struct worker *prev, *next;
156
70 pthread_t tid; 157 pthread_t tid;
71 pthread_attr_t attr;
72 158
73 pthread_attr_init (&attr); 159 /* locked by reslock, reqlock or wrklock */
74 pthread_attr_setstacksize (&attr, STACKSIZE); 160 aio_req req; /* currently processed request */
75 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 161 void *dbuf;
162 DIR *dirp;
163} worker;
76 164
77 sigfillset (&fullsigset); 165static worker wrk_first = { &wrk_first, &wrk_first, 0 };
78 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
79 166
80 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 167static void worker_clear (worker *wrk)
81 started++;
82
83 sigprocmask (SIG_SETMASK, &oldsigset, 0);
84}
85
86static void
87send_reqs (void)
88{ 168{
89 /* this write is atomic */ 169 if (wrk->dirp)
90 while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
91 { 170 {
92 qs = qs->next; 171 closedir (wrk->dirp);
93 if (!qs) qe = 0; 172 wrk->dirp = 0;
94 } 173 }
95}
96 174
97static void 175 if (wrk->dbuf)
98send_req (aio_req req) 176 {
177 free (wrk->dbuf);
178 wrk->dbuf = 0;
179 }
180}
181
182static void worker_free (worker *wrk)
99{ 183{
100 nreqs++; 184 wrk->next->prev = wrk->prev;
185 wrk->prev->next = wrk->next;
186
187 free (wrk);
188}
189
190static pthread_mutex_t reslock = AIO_MUTEX_INIT;
191static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
192static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
193
194/*
195 * a somewhat faster data structure might be nice, but
196 * with 8 priorities this actually needs <20 insns
197 * per shift, the most expensive operation.
198 */
199typedef struct {
200 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
201 int size;
202} reqq;
203
204static reqq req_queue;
205static reqq res_queue;
206
207int reqq_push (reqq *q, aio_req req)
208{
209 int pri = req->pri;
101 req->next = 0; 210 req->next = 0;
102 211
103 if (qe) 212 if (q->qe[pri])
104 { 213 {
105 qe->next = req; 214 q->qe[pri]->next = req;
106 qe = req; 215 q->qe[pri] = req;
107 } 216 }
108 else 217 else
109 qe = qs = req; 218 q->qe[pri] = q->qs[pri] = req;
110 219
111 send_reqs (); 220 return q->size++;
112} 221}
113 222
114static void 223aio_req reqq_shift (reqq *q)
115end_thread (void)
116{ 224{
117 aio_req req; 225 int pri;
118 New (0, req, 1, aio_cb);
119 req->type = REQ_QUIT;
120 226
121 send_req (req); 227 if (!q->size)
122} 228 return 0;
123 229
124static void 230 --q->size;
125read_write (pTHX_
126 int dowrite, int fd, off_t offset, size_t length,
127 SV *data, STRLEN dataoffset, SV *callback)
128{
129 aio_req req;
130 STRLEN svlen;
131 char *svptr = SvPV (data, svlen);
132 231
133 SvUPGRADE (data, SVt_PV); 232 for (pri = NUM_PRI; pri--; )
134 SvPOK_on (data);
135
136 if (dataoffset < 0)
137 dataoffset += svlen;
138
139 if (dataoffset < 0 || dataoffset > svlen)
140 croak ("data offset outside of string");
141
142 if (dowrite)
143 {
144 /* write: check length and adjust. */
145 if (length < 0 || length + dataoffset > svlen)
146 length = svlen - dataoffset;
147 } 233 {
148 else 234 aio_req req = q->qs[pri];
149 {
150 /* read: grow scalar as necessary */
151 svptr = SvGROW (data, length + dataoffset);
152 }
153 235
154 if (length < 0)
155 croak ("length must not be negative");
156
157 Newz (0, req, 1, aio_cb);
158
159 if (!req) 236 if (req)
160 croak ("out of memory during aio_req allocation"); 237 {
238 if (!(q->qs[pri] = req->next))
239 q->qe[pri] = 0;
161 240
162 req->type = dowrite ? REQ_WRITE : REQ_READ; 241 return req;
163 req->fd = fd; 242 }
164 req->offset = offset; 243 }
165 req->length = length;
166 req->data = SvREFCNT_inc (data);
167 req->dataptr = (char *)svptr + dataoffset;
168 req->callback = SvREFCNT_inc (callback);
169 244
170 send_req (req); 245 abort ();
171} 246}
172 247
173static void 248static int poll_cb (int max);
174poll_wait () 249static void req_invoke (aio_req req);
250static void req_free (aio_req req);
251static void req_cancel (aio_req req);
252
253/* must be called at most once */
254static SV *req_sv (aio_req req, const char *klass)
255{
256 if (!req->self)
257 {
258 req->self = (SV *)newHV ();
259 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
260 }
261
262 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
263}
264
265static aio_req SvAIO_REQ (SV *sv)
266{
267 MAGIC *mg;
268
269 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
270 croak ("object of class " AIO_REQ_KLASS " expected");
271
272 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
273
274 return mg ? (aio_req)mg->mg_ptr : 0;
275}
276
277static void aio_grp_feed (aio_req grp)
278{
279 while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
280 {
281 int old_len = grp->length;
282
283 if (grp->fh2 && SvOK (grp->fh2))
284 {
285 dSP;
286
287 ENTER;
288 SAVETMPS;
289 PUSHMARK (SP);
290 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
291 PUTBACK;
292 call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
293 SPAGAIN;
294 FREETMPS;
295 LEAVE;
296 }
297
298 /* stop if no progress has been made */
299 if (old_len == grp->length)
300 {
301 SvREFCNT_dec (grp->fh2);
302 grp->fh2 = 0;
303 break;
304 }
305 }
306}
307
308static void aio_grp_dec (aio_req grp)
309{
310 --grp->length;
311
312 /* call feeder, if applicable */
313 aio_grp_feed (grp);
314
315 /* finish, if done */
316 if (!grp->length && grp->fd)
317 {
318 req_invoke (grp);
319 req_free (grp);
320 }
321}
322
323static void poll_wait ()
175{ 324{
176 fd_set rfd; 325 fd_set rfd;
326
327 while (nreqs)
328 {
329 int size;
330#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
331 LOCK (reslock);
332#endif
333 size = res_queue.size;
334#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
335 UNLOCK (reslock);
336#endif
337
338 if (size)
339 return;
340
177 FD_ZERO(&rfd); 341 FD_ZERO(&rfd);
178 FD_SET(respipe[0], &rfd); 342 FD_SET(respipe [0], &rfd);
179 343
180 select (respipe[0] + 1, &rfd, 0, 0, 0); 344 select (respipe [0] + 1, &rfd, 0, 0, 0);
345 }
181} 346}
182 347
183static int 348static void req_invoke (aio_req req)
184poll_cb (pTHX) 349{
350 dSP;
351
352 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
353 {
354 errno = req->errorno;
355
356 ENTER;
357 SAVETMPS;
358 PUSHMARK (SP);
359 EXTEND (SP, 1);
360
361 switch (req->type)
362 {
363 case REQ_READDIR:
364 {
365 SV *rv = &PL_sv_undef;
366
367 if (req->result >= 0)
368 {
369 int i;
370 char *buf = req->data2ptr;
371 AV *av = newAV ();
372
373 av_extend (av, req->result - 1);
374
375 for (i = 0; i < req->result; ++i)
376 {
377 SV *sv = newSVpv (buf, 0);
378
379 av_store (av, i, sv);
380 buf += SvCUR (sv) + 1;
381 }
382
383 rv = sv_2mortal (newRV_noinc ((SV *)av));
384 }
385
386 PUSHs (rv);
387 }
388 break;
389
390 case REQ_OPEN:
391 {
392 /* convert fd to fh */
393 SV *fh;
394
395 PUSHs (sv_2mortal (newSViv (req->result)));
396 PUTBACK;
397 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
398 SPAGAIN;
399
400 fh = SvREFCNT_inc (POPs);
401
402 PUSHMARK (SP);
403 XPUSHs (sv_2mortal (fh));
404 }
405 break;
406
407 case REQ_GROUP:
408 req->fd = 2; /* mark group as finished */
409
410 if (req->data)
411 {
412 int i;
413 AV *av = (AV *)req->data;
414
415 EXTEND (SP, AvFILL (av) + 1);
416 for (i = 0; i <= AvFILL (av); ++i)
417 PUSHs (*av_fetch (av, i, 0));
418 }
419 break;
420
421 case REQ_NOP:
422 case REQ_BUSY:
423 break;
424
425 default:
426 PUSHs (sv_2mortal (newSViv (req->result)));
427 break;
428 }
429
430
431 PUTBACK;
432 call_sv (req->callback, G_VOID | G_EVAL);
433 SPAGAIN;
434
435 FREETMPS;
436 LEAVE;
437 }
438
439 if (req->grp)
440 {
441 aio_req grp = req->grp;
442
443 /* unlink request */
444 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
445 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
446
447 if (grp->grp_first == req)
448 grp->grp_first = req->grp_next;
449
450 aio_grp_dec (grp);
451 }
452
453 if (SvTRUE (ERRSV))
454 {
455 req_free (req);
456 croak (0);
457 }
458}
459
460static void req_free (aio_req req)
461{
462 if (req->self)
463 {
464 sv_unmagic (req->self, PERL_MAGIC_ext);
465 SvREFCNT_dec (req->self);
466 }
467
468 SvREFCNT_dec (req->data);
469 SvREFCNT_dec (req->fh);
470 SvREFCNT_dec (req->fh2);
471 SvREFCNT_dec (req->callback);
472 Safefree (req->statdata);
473
474 if (req->type == REQ_READDIR)
475 free (req->data2ptr);
476
477 Safefree (req);
478}
479
480static void req_cancel_subs (aio_req grp)
481{
482 aio_req sub;
483
484 if (grp->type != REQ_GROUP)
485 return;
486
487 SvREFCNT_dec (grp->fh2);
488 grp->fh2 = 0;
489
490 for (sub = grp->grp_first; sub; sub = sub->grp_next)
491 req_cancel (sub);
492}
493
494static void req_cancel (aio_req req)
495{
496 req->flags |= FLAG_CANCELLED;
497
498 req_cancel_subs (req);
499}
500
501static int poll_cb (int max)
185{ 502{
186 dSP; 503 dSP;
187 int count = 0; 504 int count = 0;
505 int do_croak = 0;
188 aio_req req; 506 aio_req req;
189 507
190 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 508 while (max <= 0 || count < max)
191 { 509 {
510 LOCK (reslock);
511 req = reqq_shift (&res_queue);
512
513 if (req)
514 {
515 if (!res_queue.size)
516 {
517 /* read any signals sent by the worker threads */
518 char buf [32];
519 while (read (respipe [0], buf, 32) == 32)
520 ;
521 }
522 }
523
524 UNLOCK (reslock);
525
526 if (!req)
527 break;
528
192 nreqs--; 529 --nreqs;
193 530
194 if (req->type == REQ_QUIT) 531 if (req->type == REQ_QUIT)
195 started--; 532 started--;
533 else if (req->type == REQ_GROUP && req->length)
534 {
535 req->fd = 1; /* mark request as delayed */
536 continue;
537 }
196 else 538 else
197 { 539 {
198 int errorno = errno;
199 errno = req->errorno;
200
201 if (req->type == REQ_READ) 540 if (req->type == REQ_READ)
202 SvCUR_set (req->data, req->dataoffset 541 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
203 + req->result > 0 ? req->result : 0);
204 542
543 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
544 SvREADONLY_off (req->data);
545
205 if (req->data) 546 if (req->statdata)
206 SvREFCNT_dec (req->data);
207
208 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
209 { 547 {
210 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 548 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
211 PL_laststatval = req->result; 549 PL_laststatval = req->result;
212 PL_statcache = *(req->statdata); 550 PL_statcache = *(req->statdata);
213
214 Safefree (req->statdata);
215 } 551 }
216 552
217 PUSHMARK (SP); 553 req_invoke (req);
218 XPUSHs (sv_2mortal (newSViv (req->result)));
219 554
220 if (req->type == REQ_OPEN)
221 {
222 /* convert fd to fh */
223 SV *fh;
224
225 PUTBACK;
226 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
227 SPAGAIN;
228
229 fh = POPs;
230
231 PUSHMARK (SP);
232 XPUSHs (fh);
233 }
234
235 PUTBACK;
236 call_sv (req->callback, G_VOID | G_EVAL);
237 SPAGAIN;
238
239 if (req->callback)
240 SvREFCNT_dec (req->callback);
241
242 errno = errorno;
243 count++; 555 count++;
244 } 556 }
245 557
246 Safefree (req); 558 req_free (req);
247 } 559 }
248
249 if (qs)
250 send_reqs ();
251 560
252 return count; 561 return count;
253} 562}
254 563
255static void * 564static void *aio_proc(void *arg);
256aio_proc (void *thr_arg) 565
566static void start_thread (void)
567{
568 sigset_t fullsigset, oldsigset;
569 pthread_attr_t attr;
570
571 worker *wrk = calloc (1, sizeof (worker));
572
573 if (!wrk)
574 croak ("unable to allocate worker thread data");
575
576 pthread_attr_init (&attr);
577 pthread_attr_setstacksize (&attr, STACKSIZE);
578 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
579
580 sigfillset (&fullsigset);
581
582 LOCK (wrklock);
583 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
584
585 if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
586 {
587 wrk->prev = &wrk_first;
588 wrk->next = wrk_first.next;
589 wrk_first.next->prev = wrk;
590 wrk_first.next = wrk;
591 started++;
592 }
593 else
594 free (wrk);
595
596 sigprocmask (SIG_SETMASK, &oldsigset, 0);
597 UNLOCK (wrklock);
598}
599
600static void req_send (aio_req req)
601{
602 while (started < wanted && nreqs >= started)
603 start_thread ();
604
605 ++nreqs;
606
607 LOCK (reqlock);
608 reqq_push (&req_queue, req);
609 pthread_cond_signal (&reqwait);
610 UNLOCK (reqlock);
611}
612
613static void end_thread (void)
257{ 614{
258 aio_req req; 615 aio_req req;
259 616
260 /* then loop */ 617 Newz (0, req, 1, aio_cb);
261 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 618
619 req->type = REQ_QUIT;
620 req->pri = PRI_MAX + PRI_BIAS;
621
622 req_send (req);
623}
624
625static void min_parallel (int nthreads)
626{
627 if (wanted < nthreads)
628 wanted = nthreads;
629}
630
631static void max_parallel (int nthreads)
632{
633 int cur = started;
634
635 if (wanted > nthreads)
636 wanted = nthreads;
637
638 while (cur > wanted)
639 {
640 end_thread ();
641 cur--;
642 }
643
644 while (started > wanted)
645 {
646 poll_wait ();
647 poll_cb (0);
648 }
649}
650
651static void create_pipe ()
652{
653 if (pipe (respipe))
654 croak ("unable to initialize result pipe");
655
656 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
657 croak ("cannot set result pipe to nonblocking mode");
658
659 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
660 croak ("cannot set result pipe to nonblocking mode");
661}
662
663/*****************************************************************************/
664/* work around various missing functions */
665
666#if !HAVE_PREADWRITE
667# define pread aio_pread
668# define pwrite aio_pwrite
669
670/*
671 * make our pread/pwrite safe against themselves, but not against
672 * normal read/write by using a mutex. slows down execution a lot,
673 * but that's your problem, not mine.
674 */
675static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
676
677static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
678{
679 ssize_t res;
680 off_t ooffset;
681
682 LOCK (preadwritelock);
683 ooffset = lseek (fd, 0, SEEK_CUR);
684 lseek (fd, offset, SEEK_SET);
685 res = read (fd, buf, count);
686 lseek (fd, ooffset, SEEK_SET);
687 UNLOCK (preadwritelock);
688
689 return res;
690}
691
692static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
693{
694 ssize_t res;
695 off_t ooffset;
696
697 LOCK (preadwritelock);
698 ooffset = lseek (fd, 0, SEEK_CUR);
699 lseek (fd, offset, SEEK_SET);
700 res = write (fd, buf, count);
701 lseek (fd, offset, SEEK_SET);
702 UNLOCK (preadwritelock);
703
704 return res;
705}
706#endif
707
708#if !HAVE_FDATASYNC
709# define fdatasync fsync
710#endif
711
712#if !HAVE_READAHEAD
713# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
714
715static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
716{
717 dBUF;
718
719 while (count > 0)
720 {
721 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
722
723 pread (fd, aio_buf, len, offset);
724 offset += len;
725 count -= len;
726 }
727
728 errno = 0;
729}
730
731#endif
732
733#if !HAVE_READDIR_R
734# define readdir_r aio_readdir_r
735
736static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
737
738static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
739{
740 struct dirent *e;
741 int errorno;
742
743 LOCK (readdirlock);
744
745 e = readdir (dirp);
746 errorno = errno;
747
748 if (e)
749 {
750 *res = ent;
751 strcpy (ent->d_name, e->d_name);
752 }
753 else
754 *res = 0;
755
756 UNLOCK (readdirlock);
757
758 errno = errorno;
759 return e ? 0 : -1;
760}
761#endif
762
763/* sendfile always needs emulation */
764static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
765{
766 ssize_t res;
767
768 if (!count)
769 return 0;
770
771#if HAVE_SENDFILE
772# if __linux
773 res = sendfile (ofd, ifd, &offset, count);
774
775# elif __freebsd
776 /*
777 * Of course, the freebsd sendfile is a dire hack with no thoughts
778 * wasted on making it similar to other I/O functions.
779 */
780 {
781 off_t sbytes;
782 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
783
784 if (res < 0 && sbytes)
785 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
786 res = sbytes;
787 }
788
789# elif __hpux
790 res = sendfile (ofd, ifd, offset, count, 0, 0);
791
792# elif __solaris
793 {
794 struct sendfilevec vec;
795 size_t sbytes;
796
797 vec.sfv_fd = ifd;
798 vec.sfv_flag = 0;
799 vec.sfv_off = offset;
800 vec.sfv_len = count;
801
802 res = sendfilev (ofd, &vec, 1, &sbytes);
803
804 if (res < 0 && sbytes)
805 res = sbytes;
806 }
807
808# endif
809#else
810 res = -1;
811 errno = ENOSYS;
812#endif
813
814 if (res < 0
815 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
816#if __solaris
817 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
818#endif
819 )
820 )
821 {
822 /* emulate sendfile. this is a major pain in the ass */
823 dBUF;
824
825 res = 0;
826
827 while (count)
828 {
829 ssize_t cnt;
830
831 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
832
833 if (cnt <= 0)
834 {
835 if (cnt && !res) res = -1;
836 break;
837 }
838
839 cnt = write (ofd, aio_buf, cnt);
840
841 if (cnt <= 0)
842 {
843 if (cnt && !res) res = -1;
844 break;
845 }
846
847 offset += cnt;
848 res += cnt;
849 count -= cnt;
850 }
851 }
852
853 return res;
854}
855
856/* read a full directory */
857static void scandir_ (aio_req req, worker *self)
858{
859 DIR *dirp;
860 union
861 {
862 struct dirent d;
863 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
864 } *u;
865 struct dirent *entp;
866 char *name, *names;
867 int memlen = 4096;
868 int memofs = 0;
869 int res = 0;
870 int errorno;
871
872 LOCK (wrklock);
873 self->dirp = dirp = opendir (req->dataptr);
874 self->dbuf = u = malloc (sizeof (*u));
875 req->data2ptr = names = malloc (memlen);
876 UNLOCK (wrklock);
877
878 if (dirp && u && names)
879 for (;;)
262 { 880 {
881 errno = 0;
882 readdir_r (dirp, &u->d, &entp);
883
884 if (!entp)
885 break;
886
887 name = entp->d_name;
888
889 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
890 {
891 int len = strlen (name) + 1;
892
893 res++;
894
895 while (memofs + len > memlen)
896 {
897 memlen *= 2;
898 LOCK (wrklock);
899 req->data2ptr = names = realloc (names, memlen);
900 UNLOCK (wrklock);
901
902 if (!names)
903 break;
904 }
905
906 memcpy (names + memofs, name, len);
907 memofs += len;
908 }
909 }
910
911 if (errno)
912 res = -1;
913
914 req->result = res;
915}
916
917/*****************************************************************************/
918
919static void *aio_proc (void *thr_arg)
920{
921 aio_req req;
922 int type;
923 worker *self = (worker *)thr_arg;
924
925 do
926 {
927 LOCK (reqlock);
928
929 for (;;)
930 {
931 self->req = req = reqq_shift (&req_queue);
932
933 if (req)
934 break;
935
936 pthread_cond_wait (&reqwait, &reqlock);
937 }
938
939 UNLOCK (reqlock);
940
263 errno = 0; /* strictly unnecessary */ 941 errno = 0; /* strictly unnecessary */
942 type = req->type; /* remember type for QUIT check */
264 943
944 if (!(req->flags & FLAG_CANCELLED))
265 switch (req->type) 945 switch (type)
266 { 946 {
267 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; 947 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
268 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; 948 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
269#if SYS_readahead 949
270 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 950 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
271#else 951 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
272 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
273#endif
274 952
275 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 953 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
276 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 954 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
277 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 955 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
278 956
279 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 957 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
280 case REQ_CLOSE: req->result = close (req->fd); break; 958 case REQ_CLOSE: req->result = close (req->fd); break;
281 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 959 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
282
283 case REQ_FSYNC: req->result = fsync (req->fd); break; 960 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
961 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
962 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
963 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
964
284 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 965 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
966 case REQ_FSYNC: req->result = fsync (req->fd); break;
967 case REQ_READDIR: scandir_ (req, self); break;
285 968
969 case REQ_BUSY:
970 {
971 struct timeval tv;
972
973 tv.tv_sec = req->fd;
974 tv.tv_usec = req->fd2;
975
976 req->result = select (0, 0, 0, 0, &tv);
977 }
978
979 case REQ_GROUP:
980 case REQ_NOP:
286 case REQ_QUIT: 981 case REQ_QUIT:
287 write (respipe[1], (void *)&req, sizeof (req)); 982 break;
288 return 0;
289 983
290 default: 984 default:
291 req->result = ENOSYS; 985 req->result = ENOSYS;
292 break; 986 break;
293 } 987 }
294 988
295 req->errorno = errno; 989 req->errorno = errno;
296 write (respipe[1], (void *)&req, sizeof (req)); 990
991 LOCK (reslock);
992
993 if (!reqq_push (&res_queue, req))
994 /* write a dummy byte to the pipe so fh becomes ready */
995 write (respipe [1], &respipe, 1);
996
997 self->req = 0;
998 worker_clear (self);
999
1000 UNLOCK (reslock);
297 } 1001 }
1002 while (type != REQ_QUIT);
1003
1004 LOCK (wrklock);
1005 worker_free (self);
1006 UNLOCK (wrklock);
298 1007
299 return 0; 1008 return 0;
300} 1009}
301 1010
1011/*****************************************************************************/
1012
1013static void atfork_prepare (void)
1014{
1015 LOCK (wrklock);
1016 LOCK (reqlock);
1017 LOCK (reslock);
1018#if !HAVE_PREADWRITE
1019 LOCK (preadwritelock);
1020#endif
1021#if !HAVE_READDIR_R
1022 LOCK (readdirlock);
1023#endif
1024}
1025
1026static void atfork_parent (void)
1027{
1028#if !HAVE_READDIR_R
1029 UNLOCK (readdirlock);
1030#endif
1031#if !HAVE_PREADWRITE
1032 UNLOCK (preadwritelock);
1033#endif
1034 UNLOCK (reslock);
1035 UNLOCK (reqlock);
1036 UNLOCK (wrklock);
1037}
1038
1039static void atfork_child (void)
1040{
1041 aio_req prv;
1042
1043 while (prv = reqq_shift (&req_queue))
1044 req_free (prv);
1045
1046 while (prv = reqq_shift (&res_queue))
1047 req_free (prv);
1048
1049 while (wrk_first.next != &wrk_first)
1050 {
1051 worker *wrk = wrk_first.next;
1052
1053 if (wrk->req)
1054 req_free (wrk->req);
1055
1056 worker_clear (wrk);
1057 worker_free (wrk);
1058 }
1059
1060 started = 0;
1061 nreqs = 0;
1062
1063 close (respipe [0]);
1064 close (respipe [1]);
1065 create_pipe ();
1066
1067 atfork_parent ();
1068}
1069
1070#define dREQ \
1071 aio_req req; \
1072 int req_pri = next_pri; \
1073 next_pri = DEFAULT_PRI + PRI_BIAS; \
1074 \
1075 if (SvOK (callback) && !SvROK (callback)) \
1076 croak ("callback must be undef or of reference type"); \
1077 \
1078 Newz (0, req, 1, aio_cb); \
1079 if (!req) \
1080 croak ("out of memory during aio_req allocation"); \
1081 \
1082 req->callback = newSVsv (callback); \
1083 req->pri = req_pri
1084
1085#define REQ_SEND \
1086 req_send (req); \
1087 \
1088 if (GIMME_V != G_VOID) \
1089 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1090
302MODULE = IO::AIO PACKAGE = IO::AIO 1091MODULE = IO::AIO PACKAGE = IO::AIO
303 1092
1093PROTOTYPES: ENABLE
1094
304BOOT: 1095BOOT:
305{ 1096{
306 if (pipe (reqpipe) || pipe (respipe)) 1097 HV *stash = gv_stashpv ("IO::AIO", 1);
307 croak ("unable to initialize request or result pipe"); 1098 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1099 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1100 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
308 1101
309 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) 1102 create_pipe ();
310 croak ("cannot set result pipe to nonblocking mode"); 1103 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
311
312 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
313 croak ("cannot set result pipe to nonblocking mode");
314} 1104}
315 1105
316void 1106void
317min_parallel(nthreads) 1107min_parallel (nthreads)
318 int nthreads 1108 int nthreads
319 PROTOTYPE: $ 1109 PROTOTYPE: $
320 CODE:
321 while (nthreads > started)
322 start_thread ();
323 1110
324void 1111void
325max_parallel(nthreads) 1112max_parallel (nthreads)
326 int nthreads 1113 int nthreads
327 PROTOTYPE: $ 1114 PROTOTYPE: $
328 CODE:
329{
330 int cur = started;
331 while (cur > nthreads)
332 {
333 end_thread ();
334 cur--;
335 }
336 1115
337 while (started > nthreads)
338 {
339 poll_wait ();
340 poll_cb (aTHX);
341 }
342}
343
344void 1116void
345aio_open(pathname,flags,mode,callback) 1117aio_open (pathname,flags,mode,callback=&PL_sv_undef)
346 SV * pathname 1118 SV * pathname
347 int flags 1119 int flags
348 int mode 1120 int mode
349 SV * callback 1121 SV * callback
350 PROTOTYPE: $$$$ 1122 PROTOTYPE: $$$;$
351 CODE: 1123 PPCODE:
352{ 1124{
353 aio_req req; 1125 dREQ;
354
355 Newz (0, req, 1, aio_cb);
356
357 if (!req)
358 croak ("out of memory during aio_req allocation");
359 1126
360 req->type = REQ_OPEN; 1127 req->type = REQ_OPEN;
361 req->data = newSVsv (pathname); 1128 req->data = newSVsv (pathname);
362 req->dataptr = SvPV_nolen (req->data); 1129 req->dataptr = SvPVbyte_nolen (req->data);
363 req->fd = flags; 1130 req->fd = flags;
364 req->mode = mode; 1131 req->mode = mode;
365 req->callback = SvREFCNT_inc (callback);
366 1132
367 send_req (req); 1133 REQ_SEND;
368} 1134}
369 1135
370void 1136void
371aio_close(fh,callback) 1137aio_close (fh,callback=&PL_sv_undef)
372 InputStream fh 1138 SV * fh
373 SV * callback 1139 SV * callback
374 PROTOTYPE: $$ 1140 PROTOTYPE: $;$
375 ALIAS: 1141 ALIAS:
376 aio_close = REQ_CLOSE 1142 aio_close = REQ_CLOSE
377 aio_fsync = REQ_FSYNC 1143 aio_fsync = REQ_FSYNC
378 aio_fdatasync = REQ_FDATASYNC 1144 aio_fdatasync = REQ_FDATASYNC
379 CODE: 1145 PPCODE:
1146{
1147 dREQ;
1148
1149 req->type = ix;
1150 req->fh = newSVsv (fh);
1151 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1152
1153 REQ_SEND (req);
1154}
1155
1156void
1157aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1158 SV * fh
1159 UV offset
1160 UV length
1161 SV * data
1162 UV dataoffset
1163 SV * callback
1164 ALIAS:
1165 aio_read = REQ_READ
1166 aio_write = REQ_WRITE
1167 PROTOTYPE: $$$$$;$
1168 PPCODE:
380{ 1169{
381 aio_req req; 1170 aio_req req;
1171 STRLEN svlen;
1172 char *svptr = SvPVbyte (data, svlen);
382 1173
383 Newz (0, req, 1, aio_cb); 1174 SvUPGRADE (data, SVt_PV);
1175 SvPOK_on (data);
384 1176
385 if (!req) 1177 if (dataoffset < 0)
386 croak ("out of memory during aio_req allocation"); 1178 dataoffset += svlen;
387 1179
388 req->type = ix; 1180 if (dataoffset < 0 || dataoffset > svlen)
389 req->fd = PerlIO_fileno (fh); 1181 croak ("data offset outside of string");
390 req->callback = SvREFCNT_inc (callback);
391 1182
392 send_req (req); 1183 if (ix == REQ_WRITE)
393} 1184 {
394 1185 /* write: check length and adjust. */
395void 1186 if (length < 0 || length + dataoffset > svlen)
396aio_read(fh,offset,length,data,dataoffset,callback) 1187 length = svlen - dataoffset;
397 InputStream fh 1188 }
398 UV offset 1189 else
399 IV length 1190 {
400 SV * data 1191 /* read: grow scalar as necessary */
401 IV dataoffset 1192 svptr = SvGROW (data, length + dataoffset);
402 SV * callback 1193 }
403 PROTOTYPE: $$$$$$
404 CODE:
405 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
406
407void
408aio_write(fh,offset,length,data,dataoffset,callback)
409 OutputStream fh
410 UV offset
411 IV length
412 SV * data
413 IV dataoffset
414 SV * callback
415 PROTOTYPE: $$$$$$
416 CODE:
417 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
418
419void
420aio_readahead(fh,offset,length,callback)
421 InputStream fh
422 UV offset
423 IV length
424 SV * callback
425 PROTOTYPE: $$$$
426 CODE:
427{
428 aio_req req;
429 1194
430 if (length < 0) 1195 if (length < 0)
431 croak ("length must not be negative"); 1196 croak ("length must not be negative");
432 1197
433 Newz (0, req, 1, aio_cb); 1198 {
1199 dREQ;
434 1200
435 if (!req) 1201 req->type = ix;
436 croak ("out of memory during aio_req allocation"); 1202 req->fh = newSVsv (fh);
1203 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1204 : IoOFP (sv_2io (fh)));
1205 req->offset = offset;
1206 req->length = length;
1207 req->data = SvREFCNT_inc (data);
1208 req->dataptr = (char *)svptr + dataoffset;
1209
1210 if (!SvREADONLY (data))
1211 {
1212 SvREADONLY_on (data);
1213 req->data2ptr = (void *)data;
1214 }
1215
1216 REQ_SEND;
1217 }
1218}
1219
1220void
1221aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1222 SV * out_fh
1223 SV * in_fh
1224 UV in_offset
1225 UV length
1226 SV * callback
1227 PROTOTYPE: $$$$;$
1228 PPCODE:
1229{
1230 dREQ;
1231
1232 req->type = REQ_SENDFILE;
1233 req->fh = newSVsv (out_fh);
1234 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1235 req->fh2 = newSVsv (in_fh);
1236 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1237 req->offset = in_offset;
1238 req->length = length;
1239
1240 REQ_SEND;
1241}
1242
1243void
1244aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1245 SV * fh
1246 UV offset
1247 IV length
1248 SV * callback
1249 PROTOTYPE: $$$;$
1250 PPCODE:
1251{
1252 dREQ;
437 1253
438 req->type = REQ_READAHEAD; 1254 req->type = REQ_READAHEAD;
1255 req->fh = newSVsv (fh);
439 req->fd = PerlIO_fileno (fh); 1256 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
440 req->offset = offset; 1257 req->offset = offset;
441 req->length = length; 1258 req->length = length;
442 req->callback = SvREFCNT_inc (callback);
443 1259
444 send_req (req); 1260 REQ_SEND;
445} 1261}
446 1262
447void 1263void
448aio_stat(fh_or_path,callback) 1264aio_stat (fh_or_path,callback=&PL_sv_undef)
449 SV * fh_or_path 1265 SV * fh_or_path
450 SV * callback 1266 SV * callback
451 PROTOTYPE: $$
452 ALIAS: 1267 ALIAS:
1268 aio_stat = REQ_STAT
453 aio_lstat = 1 1269 aio_lstat = REQ_LSTAT
454 CODE: 1270 PPCODE:
455{ 1271{
456 aio_req req; 1272 dREQ;
457
458 Newz (0, req, 1, aio_cb);
459
460 if (!req)
461 croak ("out of memory during aio_req allocation");
462 1273
463 New (0, req->statdata, 1, Stat_t); 1274 New (0, req->statdata, 1, Stat_t);
464
465 if (!req->statdata) 1275 if (!req->statdata)
1276 {
1277 req_free (req);
466 croak ("out of memory during aio_req->statdata allocation"); 1278 croak ("out of memory during aio_req->statdata allocation");
1279 }
467 1280
468 if (SvPOK (fh_or_path)) 1281 if (SvPOK (fh_or_path))
469 { 1282 {
470 req->type = ix ? REQ_LSTAT : REQ_STAT; 1283 req->type = ix;
471 req->data = newSVsv (fh_or_path); 1284 req->data = newSVsv (fh_or_path);
472 req->dataptr = SvPV_nolen (req->data); 1285 req->dataptr = SvPVbyte_nolen (req->data);
473 } 1286 }
474 else 1287 else
475 { 1288 {
476 req->type = REQ_FSTAT; 1289 req->type = REQ_FSTAT;
1290 req->fh = newSVsv (fh_or_path);
477 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1291 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
478 } 1292 }
479 1293
480 req->callback = SvREFCNT_inc (callback); 1294 REQ_SEND;
481
482 send_req (req);
483} 1295}
484 1296
485void 1297void
486aio_unlink(pathname,callback) 1298aio_unlink (pathname,callback=&PL_sv_undef)
487 SV * pathname 1299 SV * pathname
488 SV * callback 1300 SV * callback
1301 ALIAS:
1302 aio_unlink = REQ_UNLINK
1303 aio_rmdir = REQ_RMDIR
1304 aio_readdir = REQ_READDIR
1305 PPCODE:
1306{
1307 dREQ;
1308
1309 req->type = ix;
1310 req->data = newSVsv (pathname);
1311 req->dataptr = SvPVbyte_nolen (req->data);
1312
1313 REQ_SEND;
1314}
1315
1316void
1317aio_link (oldpath,newpath,callback=&PL_sv_undef)
1318 SV * oldpath
1319 SV * newpath
1320 SV * callback
1321 ALIAS:
1322 aio_link = REQ_LINK
1323 aio_symlink = REQ_SYMLINK
1324 aio_rename = REQ_RENAME
1325 PPCODE:
1326{
1327 dREQ;
1328
1329 req->type = ix;
1330 req->fh = newSVsv (oldpath);
1331 req->data2ptr = SvPVbyte_nolen (req->fh);
1332 req->data = newSVsv (newpath);
1333 req->dataptr = SvPVbyte_nolen (req->data);
1334
1335 REQ_SEND;
1336}
1337
1338void
1339aio_busy (delay,callback=&PL_sv_undef)
1340 double delay
1341 SV * callback
1342 PPCODE:
1343{
1344 dREQ;
1345
1346 req->type = REQ_BUSY;
1347 req->fd = delay < 0. ? 0 : delay;
1348 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1349
1350 REQ_SEND;
1351}
1352
1353void
1354aio_group (callback=&PL_sv_undef)
1355 SV * callback
489 PROTOTYPE: $$ 1356 PROTOTYPE: ;$
1357 PPCODE:
1358{
1359 dREQ;
1360
1361 req->type = REQ_GROUP;
1362 req_send (req);
1363
1364 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1365}
1366
1367void
1368aio_nop (callback=&PL_sv_undef)
1369 SV * callback
1370 PPCODE:
1371{
1372 dREQ;
1373
1374 req->type = REQ_NOP;
1375
1376 REQ_SEND;
1377}
1378
1379void
1380aioreq_pri (int pri = DEFAULT_PRI)
1381 CODE:
1382 if (pri < PRI_MIN) pri = PRI_MIN;
1383 if (pri > PRI_MAX) pri = PRI_MAX;
1384 next_pri = pri + PRI_BIAS;
1385
1386void
1387aioreq_nice (int nice = 0)
1388 CODE:
1389 nice = next_pri - nice;
1390 if (nice < PRI_MIN) nice = PRI_MIN;
1391 if (nice > PRI_MAX) nice = PRI_MAX;
1392 next_pri = nice + PRI_BIAS;
1393
1394void
1395flush ()
1396 PROTOTYPE:
490 CODE: 1397 CODE:
491{ 1398 while (nreqs)
492 aio_req req; 1399 {
493 1400 poll_wait ();
494 Newz (0, req, 1, aio_cb); 1401 poll_cb (0);
495 1402 }
496 if (!req) 1403
497 croak ("out of memory during aio_req allocation"); 1404void
498 1405poll()
499 req->type = REQ_UNLINK; 1406 PROTOTYPE:
500 req->data = newSVsv (pathname); 1407 CODE:
501 req->dataptr = SvPV_nolen (req->data); 1408 if (nreqs)
502 req->callback = SvREFCNT_inc (callback); 1409 {
503 1410 poll_wait ();
504 send_req (req); 1411 poll_cb (0);
505} 1412 }
506 1413
507int 1414int
508poll_fileno() 1415poll_fileno()
509 PROTOTYPE: 1416 PROTOTYPE:
510 CODE: 1417 CODE:
511 RETVAL = respipe[0]; 1418 RETVAL = respipe [0];
512 OUTPUT: 1419 OUTPUT:
513 RETVAL 1420 RETVAL
514 1421
515int 1422int
516poll_cb(...) 1423poll_cb(...)
517 PROTOTYPE: 1424 PROTOTYPE:
518 CODE: 1425 CODE:
1426 RETVAL = poll_cb (0);
1427 OUTPUT:
1428 RETVAL
1429
1430int
1431poll_some(int max = 0)
1432 PROTOTYPE: $
1433 CODE:
519 RETVAL = poll_cb (aTHX); 1434 RETVAL = poll_cb (max);
520 OUTPUT: 1435 OUTPUT:
521 RETVAL 1436 RETVAL
522 1437
523void 1438void
524poll_wait() 1439poll_wait()
525 PROTOTYPE: 1440 PROTOTYPE:
526 CODE: 1441 CODE:
1442 if (nreqs)
527 poll_wait (); 1443 poll_wait ();
528 1444
529int 1445int
530nreqs() 1446nreqs()
531 PROTOTYPE: 1447 PROTOTYPE:
532 CODE: 1448 CODE:
533 RETVAL = nreqs; 1449 RETVAL = nreqs;
534 OUTPUT: 1450 OUTPUT:
535 RETVAL 1451 RETVAL
536 1452
1453PROTOTYPES: DISABLE
1454
1455MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1456
1457void
1458cancel (aio_req_ornot req)
1459 CODE:
1460 req_cancel (req);
1461
1462void
1463cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1464 CODE:
1465 SvREFCNT_dec (req->callback);
1466 req->callback = newSVsv (callback);
1467
1468MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1469
1470void
1471add (aio_req grp, ...)
1472 PPCODE:
1473{
1474 int i;
1475 aio_req req;
1476
1477 if (grp->fd == 2)
1478 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1479
1480 for (i = 1; i < items; ++i )
1481 {
1482 if (GIMME_V != G_VOID)
1483 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1484
1485 req = SvAIO_REQ (ST (i));
1486
1487 if (req)
1488 {
1489 ++grp->length;
1490 req->grp = grp;
1491
1492 req->grp_prev = 0;
1493 req->grp_next = grp->grp_first;
1494
1495 if (grp->grp_first)
1496 grp->grp_first->grp_prev = req;
1497
1498 grp->grp_first = req;
1499 }
1500 }
1501}
1502
1503void
1504cancel_subs (aio_req_ornot req)
1505 CODE:
1506 req_cancel_subs (req);
1507
1508void
1509result (aio_req grp, ...)
1510 CODE:
1511{
1512 int i;
1513 AV *av = newAV ();
1514
1515 for (i = 1; i < items; ++i )
1516 av_push (av, newSVsv (ST (i)));
1517
1518 SvREFCNT_dec (grp->data);
1519 grp->data = (SV *)av;
1520}
1521
1522void
1523limit (aio_req grp, int limit)
1524 CODE:
1525 grp->fd2 = limit;
1526 aio_grp_feed (grp);
1527
1528void
1529feed (aio_req grp, SV *callback=&PL_sv_undef)
1530 CODE:
1531{
1532 SvREFCNT_dec (grp->fh2);
1533 grp->fh2 = newSVsv (callback);
1534
1535 if (grp->fd2 <= 0)
1536 grp->fd2 = 2;
1537
1538 aio_grp_feed (grp);
1539}
1540

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