1 |
#include "eio.h" |
2 |
#include "xthread.h" |
3 |
|
4 |
#include <errno.h> |
5 |
#include <stddef.h> |
6 |
#include <stdlib.h> |
7 |
#include <string.h> |
8 |
#include <errno.h> |
9 |
#include <sys/types.h> |
10 |
#include <sys/stat.h> |
11 |
#include <limits.h> |
12 |
#include <fcntl.h> |
13 |
#include <assert.h> |
14 |
|
15 |
#ifndef EIO_FINISH |
16 |
# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0 |
17 |
#endif |
18 |
|
19 |
#ifndef EIO_DESTROY |
20 |
# define EIO_DESTROY(req) do { if ((req)->destroy) (req)->destroy (req); } while (0) |
21 |
#endif |
22 |
|
23 |
#ifndef EIO_FEED |
24 |
# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0) |
25 |
#endif |
26 |
|
27 |
#ifdef _WIN32 |
28 |
|
29 |
/*doh*/ |
30 |
|
31 |
#else |
32 |
|
33 |
# include "config.h" |
34 |
# include <sys/time.h> |
35 |
# include <sys/select.h> |
36 |
# include <unistd.h> |
37 |
# include <utime.h> |
38 |
# include <signal.h> |
39 |
# include <dirent.h> |
40 |
|
41 |
# ifndef EIO_STRUCT_DIRENT |
42 |
# define EIO_STRUCT_DIRENT struct dirent |
43 |
# endif |
44 |
|
45 |
#endif |
46 |
|
47 |
#if HAVE_SENDFILE |
48 |
# if __linux |
49 |
# include <sys/sendfile.h> |
50 |
# elif __freebsd |
51 |
# include <sys/socket.h> |
52 |
# include <sys/uio.h> |
53 |
# elif __hpux |
54 |
# include <sys/socket.h> |
55 |
# elif __solaris /* not yet */ |
56 |
# include <sys/sendfile.h> |
57 |
# else |
58 |
# error sendfile support requested but not available |
59 |
# endif |
60 |
#endif |
61 |
|
62 |
/* number of seconds after which an idle threads exit */ |
63 |
#define IDLE_TIMEOUT 10 |
64 |
|
65 |
/* used for struct dirent, AIX doesn't provide it */ |
66 |
#ifndef NAME_MAX |
67 |
# define NAME_MAX 4096 |
68 |
#endif |
69 |
|
70 |
/* buffer size for various temporary buffers */ |
71 |
#define EIO_BUFSIZE 65536 |
72 |
|
73 |
#define dBUF \ |
74 |
char *eio_buf; \ |
75 |
X_LOCK (etplock); \ |
76 |
self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \ |
77 |
X_UNLOCK (etplock); \ |
78 |
errno = ENOMEM; \ |
79 |
if (!eio_buf) \ |
80 |
return -1; |
81 |
|
82 |
#define EIO_TICKS ((1000000 + 1023) >> 10) |
83 |
|
84 |
/*****************************************************************************/ |
85 |
|
86 |
/* calculcate time difference in ~1/EIO_TICKS of a second */ |
87 |
static int tvdiff (struct timeval *tv1, struct timeval *tv2) |
88 |
{ |
89 |
return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS |
90 |
+ ((tv2->tv_usec - tv1->tv_usec) >> 10); |
91 |
} |
92 |
|
93 |
static unsigned int started, idle, wanted = 4; |
94 |
|
95 |
typedef struct etp_pool |
96 |
{ |
97 |
void (*want_poll_cb) (void); |
98 |
void (*done_poll_cb) (void); |
99 |
|
100 |
unsigned int max_poll_time; |
101 |
unsigned int max_poll_reqs; |
102 |
} etp_pool; |
103 |
|
104 |
static volatile unsigned int nreqs, nready, npending; |
105 |
static volatile unsigned int max_idle = 4; |
106 |
|
107 |
static mutex_t etplock = X_MUTEX_INIT; |
108 |
static mutex_t reslock = X_MUTEX_INIT; |
109 |
static mutex_t reqlock = X_MUTEX_INIT; |
110 |
static cond_t reqwait = X_COND_INIT; |
111 |
|
112 |
typedef struct worker |
113 |
{ |
114 |
/* locked by etplock */ |
115 |
struct worker *prev, *next; |
116 |
|
117 |
thread_t tid; |
118 |
|
119 |
/* locked by reslock, reqlock or etplock */ |
120 |
eio_req *req; /* currently processed request */ |
121 |
void *dbuf; |
122 |
DIR *dirp; |
123 |
} worker; |
124 |
|
125 |
static worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */ |
126 |
|
127 |
/* worker threads management */ |
128 |
|
129 |
static void worker_clear (worker *wrk) |
130 |
{ |
131 |
if (wrk->dirp) |
132 |
{ |
133 |
closedir (wrk->dirp); |
134 |
wrk->dirp = 0; |
135 |
} |
136 |
|
137 |
if (wrk->dbuf) |
138 |
{ |
139 |
free (wrk->dbuf); |
140 |
wrk->dbuf = 0; |
141 |
} |
142 |
} |
143 |
|
144 |
static void worker_free (worker *wrk) |
145 |
{ |
146 |
wrk->next->prev = wrk->prev; |
147 |
wrk->prev->next = wrk->next; |
148 |
|
149 |
free (wrk); |
150 |
} |
151 |
|
152 |
unsigned int eio_nreqs (void) |
153 |
{ |
154 |
return nreqs; |
155 |
} |
156 |
|
157 |
unsigned int eio_nready (void) |
158 |
{ |
159 |
unsigned int retval; |
160 |
|
161 |
if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
162 |
retval = nready; |
163 |
if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
164 |
|
165 |
return retval; |
166 |
} |
167 |
|
168 |
unsigned int eio_npending (void) |
169 |
{ |
170 |
unsigned int retval; |
171 |
|
172 |
if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
173 |
retval = npending; |
174 |
if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
175 |
|
176 |
return retval; |
177 |
} |
178 |
|
179 |
unsigned int eio_nthreads (void) |
180 |
{ |
181 |
unsigned int retval; |
182 |
|
183 |
if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
184 |
retval = started; |
185 |
if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
186 |
|
187 |
return retval; |
188 |
} |
189 |
|
190 |
/* |
191 |
* a somewhat faster data structure might be nice, but |
192 |
* with 8 priorities this actually needs <20 insns |
193 |
* per shift, the most expensive operation. |
194 |
*/ |
195 |
typedef struct { |
196 |
eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */ |
197 |
int size; |
198 |
} reqq; |
199 |
|
200 |
static reqq req_queue; |
201 |
static reqq res_queue; |
202 |
|
203 |
static int reqq_push (reqq *q, eio_req *req) |
204 |
{ |
205 |
int pri = req->pri; |
206 |
req->next = 0; |
207 |
|
208 |
if (q->qe[pri]) |
209 |
{ |
210 |
q->qe[pri]->next = req; |
211 |
q->qe[pri] = req; |
212 |
} |
213 |
else |
214 |
q->qe[pri] = q->qs[pri] = req; |
215 |
|
216 |
return q->size++; |
217 |
} |
218 |
|
219 |
static eio_req *reqq_shift (reqq *q) |
220 |
{ |
221 |
int pri; |
222 |
|
223 |
if (!q->size) |
224 |
return 0; |
225 |
|
226 |
--q->size; |
227 |
|
228 |
for (pri = EIO_NUM_PRI; pri--; ) |
229 |
{ |
230 |
eio_req *req = q->qs[pri]; |
231 |
|
232 |
if (req) |
233 |
{ |
234 |
if (!(q->qs[pri] = (eio_req *)req->next)) |
235 |
q->qe[pri] = 0; |
236 |
|
237 |
return req; |
238 |
} |
239 |
} |
240 |
|
241 |
abort (); |
242 |
} |
243 |
|
244 |
static void etp_atfork_prepare (void) |
245 |
{ |
246 |
X_LOCK (etplock); |
247 |
X_LOCK (reqlock); |
248 |
X_LOCK (reslock); |
249 |
#if !HAVE_PREADWRITE |
250 |
X_LOCK (preadwritelock); |
251 |
#endif |
252 |
#if !HAVE_READDIR_R |
253 |
X_LOCK (readdirlock); |
254 |
#endif |
255 |
} |
256 |
|
257 |
static void etp_atfork_parent (void) |
258 |
{ |
259 |
#if !HAVE_READDIR_R |
260 |
X_UNLOCK (readdirlock); |
261 |
#endif |
262 |
#if !HAVE_PREADWRITE |
263 |
X_UNLOCK (preadwritelock); |
264 |
#endif |
265 |
X_UNLOCK (reslock); |
266 |
X_UNLOCK (reqlock); |
267 |
X_UNLOCK (etplock); |
268 |
} |
269 |
|
270 |
static void etp_atfork_child (void) |
271 |
{ |
272 |
eio_req *prv; |
273 |
|
274 |
while (prv = reqq_shift (&req_queue)) |
275 |
eio_destroy (prv); |
276 |
|
277 |
while (prv = reqq_shift (&res_queue)) |
278 |
eio_destroy (prv); |
279 |
|
280 |
while (wrk_first.next != &wrk_first) |
281 |
{ |
282 |
worker *wrk = wrk_first.next; |
283 |
|
284 |
if (wrk->req) |
285 |
eio_destroy (wrk->req); |
286 |
|
287 |
worker_clear (wrk); |
288 |
worker_free (wrk); |
289 |
} |
290 |
|
291 |
started = 0; |
292 |
idle = 0; |
293 |
nreqs = 0; |
294 |
nready = 0; |
295 |
npending = 0; |
296 |
|
297 |
etp_atfork_parent (); |
298 |
} |
299 |
|
300 |
static void |
301 |
etp_once_init (void) |
302 |
{ |
303 |
X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child); |
304 |
} |
305 |
|
306 |
static int |
307 |
etp_init (etp_pool *etp, void (*want_poll)(void), void (*done_poll)(void)) |
308 |
{ |
309 |
static pthread_once_t doinit = PTHREAD_ONCE_INIT; |
310 |
|
311 |
pthread_once (&doinit, etp_once_init); |
312 |
|
313 |
memset (etp, 0, sizeof *etp); |
314 |
|
315 |
etp->want_poll_cb = want_poll; |
316 |
etp->done_poll_cb = done_poll; |
317 |
} |
318 |
|
319 |
static etp_pool etp; |
320 |
|
321 |
/*****************************************************************************/ |
322 |
|
323 |
static void grp_try_feed (eio_req *grp) |
324 |
{ |
325 |
while (grp->size < grp->int2 && !EIO_CANCELLED (grp)) |
326 |
{ |
327 |
int old_len = grp->size; |
328 |
|
329 |
EIO_FEED (grp); |
330 |
|
331 |
/* stop if no progress has been made */ |
332 |
if (old_len == grp->size) |
333 |
{ |
334 |
grp->feed = 0; |
335 |
break; |
336 |
} |
337 |
} |
338 |
} |
339 |
|
340 |
static int eio_finish (eio_req *req); |
341 |
|
342 |
static int grp_dec (eio_req *grp) |
343 |
{ |
344 |
--grp->size; |
345 |
|
346 |
/* call feeder, if applicable */ |
347 |
grp_try_feed (grp); |
348 |
|
349 |
/* finish, if done */ |
350 |
if (!grp->size && grp->int1) |
351 |
return eio_finish (grp); |
352 |
else |
353 |
return 0; |
354 |
} |
355 |
|
356 |
void eio_destroy (eio_req *req) |
357 |
{ |
358 |
if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1); |
359 |
if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2); |
360 |
|
361 |
EIO_DESTROY (req); |
362 |
} |
363 |
|
364 |
static int eio_finish (eio_req *req) |
365 |
{ |
366 |
int res = EIO_FINISH (req); |
367 |
|
368 |
if (req->grp) |
369 |
{ |
370 |
int res2; |
371 |
eio_req *grp = req->grp; |
372 |
|
373 |
/* unlink request */ |
374 |
if (req->grp_next) req->grp_next->grp_prev = req->grp_prev; |
375 |
if (req->grp_prev) req->grp_prev->grp_next = req->grp_next; |
376 |
|
377 |
if (grp->grp_first == req) |
378 |
grp->grp_first = req->grp_next; |
379 |
|
380 |
res2 = grp_dec (grp); |
381 |
|
382 |
if (!res && res2) |
383 |
res = res2; |
384 |
} |
385 |
|
386 |
eio_destroy (req); |
387 |
|
388 |
return res; |
389 |
} |
390 |
|
391 |
void eio_grp_cancel (eio_req *grp) |
392 |
{ |
393 |
for (grp = grp->grp_first; grp; grp = grp->grp_next) |
394 |
eio_cancel (grp); |
395 |
} |
396 |
|
397 |
void eio_cancel (eio_req *req) |
398 |
{ |
399 |
X_LOCK (etplock); |
400 |
req->flags |= EIO_FLAG_CANCELLED; |
401 |
X_UNLOCK (etplock); |
402 |
|
403 |
eio_grp_cancel (req); |
404 |
} |
405 |
|
406 |
X_THREAD_PROC (eio_proc); |
407 |
|
408 |
static void start_thread (void) |
409 |
{ |
410 |
worker *wrk = calloc (1, sizeof (worker)); |
411 |
|
412 |
/*TODO*/ |
413 |
assert (("unable to allocate worker thread data", wrk)); |
414 |
|
415 |
X_LOCK (etplock); |
416 |
|
417 |
if (thread_create (&wrk->tid, eio_proc, (void *)wrk)) |
418 |
{ |
419 |
wrk->prev = &wrk_first; |
420 |
wrk->next = wrk_first.next; |
421 |
wrk_first.next->prev = wrk; |
422 |
wrk_first.next = wrk; |
423 |
++started; |
424 |
} |
425 |
else |
426 |
free (wrk); |
427 |
|
428 |
X_UNLOCK (etplock); |
429 |
} |
430 |
|
431 |
static void maybe_start_thread (void) |
432 |
{ |
433 |
if (eio_nthreads () >= wanted) |
434 |
return; |
435 |
|
436 |
/* todo: maybe use idle here, but might be less exact */ |
437 |
if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ()) |
438 |
return; |
439 |
|
440 |
start_thread (); |
441 |
} |
442 |
|
443 |
void eio_submit (eio_req *req) |
444 |
{ |
445 |
req->pri += EIO_PRI_BIAS; |
446 |
|
447 |
if (req->pri < EIO_PRI_MIN + EIO_PRI_BIAS) req->pri = EIO_PRI_MIN + EIO_PRI_BIAS; |
448 |
if (req->pri > EIO_PRI_MAX + EIO_PRI_BIAS) req->pri = EIO_PRI_MAX + EIO_PRI_BIAS; |
449 |
|
450 |
++nreqs; |
451 |
|
452 |
X_LOCK (reqlock); |
453 |
++nready; |
454 |
reqq_push (&req_queue, req); |
455 |
X_COND_SIGNAL (reqwait); |
456 |
X_UNLOCK (reqlock); |
457 |
|
458 |
maybe_start_thread (); |
459 |
} |
460 |
|
461 |
static void end_thread (void) |
462 |
{ |
463 |
eio_req *req = calloc (1, sizeof (eio_req)); |
464 |
|
465 |
req->type = EIO_QUIT; |
466 |
req->pri = EIO_PRI_MAX + EIO_PRI_BIAS; |
467 |
|
468 |
X_LOCK (reqlock); |
469 |
reqq_push (&req_queue, req); |
470 |
X_COND_SIGNAL (reqwait); |
471 |
X_UNLOCK (reqlock); |
472 |
|
473 |
X_LOCK (etplock); |
474 |
--started; |
475 |
X_UNLOCK (etplock); |
476 |
} |
477 |
|
478 |
void eio_set_max_poll_time (double nseconds) |
479 |
{ |
480 |
if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
481 |
etp.max_poll_time = nseconds; |
482 |
if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
483 |
} |
484 |
|
485 |
void eio_set_max_poll_reqs (unsigned int maxreqs) |
486 |
{ |
487 |
if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
488 |
etp.max_poll_reqs = maxreqs; |
489 |
if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
490 |
} |
491 |
|
492 |
void eio_set_max_idle (unsigned int nthreads) |
493 |
{ |
494 |
if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
495 |
max_idle = nthreads <= 0 ? 1 : nthreads; |
496 |
if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
497 |
} |
498 |
|
499 |
void eio_set_min_parallel (unsigned int nthreads) |
500 |
{ |
501 |
if (wanted < nthreads) |
502 |
wanted = nthreads; |
503 |
} |
504 |
|
505 |
void eio_set_max_parallel (unsigned int nthreads) |
506 |
{ |
507 |
if (wanted > nthreads) |
508 |
wanted = nthreads; |
509 |
|
510 |
while (started > wanted) |
511 |
end_thread (); |
512 |
} |
513 |
|
514 |
int eio_poll (void) |
515 |
{ |
516 |
int maxreqs = etp.max_poll_reqs; |
517 |
struct timeval tv_start, tv_now; |
518 |
eio_req *req; |
519 |
|
520 |
if (etp.max_poll_time) |
521 |
gettimeofday (&tv_start, 0); |
522 |
|
523 |
for (;;) |
524 |
{ |
525 |
maybe_start_thread (); |
526 |
|
527 |
X_LOCK (reslock); |
528 |
req = reqq_shift (&res_queue); |
529 |
|
530 |
if (req) |
531 |
{ |
532 |
--npending; |
533 |
|
534 |
if (!res_queue.size && etp.done_poll_cb) |
535 |
etp.done_poll_cb (); |
536 |
} |
537 |
|
538 |
X_UNLOCK (reslock); |
539 |
|
540 |
if (!req) |
541 |
return 0; |
542 |
|
543 |
--nreqs; |
544 |
|
545 |
if (req->type == EIO_GROUP && req->size) |
546 |
{ |
547 |
req->int1 = 1; /* mark request as delayed */ |
548 |
continue; |
549 |
} |
550 |
else |
551 |
{ |
552 |
int res = eio_finish (req); |
553 |
if (res) |
554 |
return res; |
555 |
} |
556 |
|
557 |
if (maxreqs && !--maxreqs) |
558 |
break; |
559 |
|
560 |
if (etp.max_poll_time) |
561 |
{ |
562 |
gettimeofday (&tv_now, 0); |
563 |
|
564 |
if (tvdiff (&tv_start, &tv_now) >= etp.max_poll_time) |
565 |
break; |
566 |
} |
567 |
} |
568 |
|
569 |
errno = EAGAIN; |
570 |
return -1; |
571 |
} |
572 |
|
573 |
/*****************************************************************************/ |
574 |
/* work around various missing functions */ |
575 |
|
576 |
#if !HAVE_PREADWRITE |
577 |
# define pread eio__pread |
578 |
# define pwrite eio__pwrite |
579 |
|
580 |
/* |
581 |
* make our pread/pwrite safe against themselves, but not against |
582 |
* normal read/write by using a mutex. slows down execution a lot, |
583 |
* but that's your problem, not mine. |
584 |
*/ |
585 |
static mutex_t preadwritelock = X_MUTEX_INIT; |
586 |
|
587 |
static ssize_t |
588 |
eio__pread (int fd, void *buf, size_t count, off_t offset) |
589 |
{ |
590 |
ssize_t res; |
591 |
off_t ooffset; |
592 |
|
593 |
X_LOCK (preadwritelock); |
594 |
ooffset = lseek (fd, 0, SEEK_CUR); |
595 |
lseek (fd, offset, SEEK_SET); |
596 |
res = read (fd, buf, count); |
597 |
lseek (fd, ooffset, SEEK_SET); |
598 |
X_UNLOCK (preadwritelock); |
599 |
|
600 |
return res; |
601 |
} |
602 |
|
603 |
static ssize_t |
604 |
eio__pwrite (int fd, void *buf, size_t count, off_t offset) |
605 |
{ |
606 |
ssize_t res; |
607 |
off_t ooffset; |
608 |
|
609 |
X_LOCK (preadwritelock); |
610 |
ooffset = lseek (fd, 0, SEEK_CUR); |
611 |
lseek (fd, offset, SEEK_SET); |
612 |
res = write (fd, buf, count); |
613 |
lseek (fd, offset, SEEK_SET); |
614 |
X_UNLOCK (preadwritelock); |
615 |
|
616 |
return res; |
617 |
} |
618 |
#endif |
619 |
|
620 |
#ifndef HAVE_FUTIMES |
621 |
|
622 |
# define utimes(path,times) eio__utimes (path, times) |
623 |
# define futimes(fd,times) eio__futimes (fd, times) |
624 |
|
625 |
static int |
626 |
eio__utimes (const char *filename, const struct timeval times[2]) |
627 |
{ |
628 |
if (times) |
629 |
{ |
630 |
struct utimbuf buf; |
631 |
|
632 |
buf.actime = times[0].tv_sec; |
633 |
buf.modtime = times[1].tv_sec; |
634 |
|
635 |
return utime (filename, &buf); |
636 |
} |
637 |
else |
638 |
return utime (filename, 0); |
639 |
} |
640 |
|
641 |
static int eio__futimes (int fd, const struct timeval tv[2]) |
642 |
{ |
643 |
errno = ENOSYS; |
644 |
return -1; |
645 |
} |
646 |
|
647 |
#endif |
648 |
|
649 |
#if !HAVE_FDATASYNC |
650 |
# define fdatasync fsync |
651 |
#endif |
652 |
|
653 |
#if !HAVE_READAHEAD |
654 |
# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self) |
655 |
|
656 |
static ssize_t |
657 |
eio__readahead (int fd, off_t offset, size_t count, worker *self) |
658 |
{ |
659 |
size_t todo = count; |
660 |
dBUF; |
661 |
|
662 |
while (todo > 0) |
663 |
{ |
664 |
size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE; |
665 |
|
666 |
pread (fd, eio_buf, len, offset); |
667 |
offset += len; |
668 |
todo -= len; |
669 |
} |
670 |
|
671 |
errno = 0; |
672 |
return count; |
673 |
} |
674 |
|
675 |
#endif |
676 |
|
677 |
#if !HAVE_READDIR_R |
678 |
# define readdir_r eio__readdir_r |
679 |
|
680 |
static mutex_t readdirlock = X_MUTEX_INIT; |
681 |
|
682 |
static int |
683 |
eio__readdir_r (DIR *dirp, EIO_STRUCT_DIRENT *ent, EIO_STRUCT_DIRENT **res) |
684 |
{ |
685 |
EIO_STRUCT_DIRENT *e; |
686 |
int errorno; |
687 |
|
688 |
X_LOCK (readdirlock); |
689 |
|
690 |
e = readdir (dirp); |
691 |
errorno = errno; |
692 |
|
693 |
if (e) |
694 |
{ |
695 |
*res = ent; |
696 |
strcpy (ent->d_name, e->d_name); |
697 |
} |
698 |
else |
699 |
*res = 0; |
700 |
|
701 |
X_UNLOCK (readdirlock); |
702 |
|
703 |
errno = errorno; |
704 |
return e ? 0 : -1; |
705 |
} |
706 |
#endif |
707 |
|
708 |
/* sendfile always needs emulation */ |
709 |
static ssize_t |
710 |
eio__sendfile (int ofd, int ifd, off_t offset, size_t count, worker *self) |
711 |
{ |
712 |
ssize_t res; |
713 |
|
714 |
if (!count) |
715 |
return 0; |
716 |
|
717 |
#if HAVE_SENDFILE |
718 |
# if __linux |
719 |
res = sendfile (ofd, ifd, &offset, count); |
720 |
|
721 |
# elif __freebsd |
722 |
/* |
723 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
724 |
* wasted on making it similar to other I/O functions. |
725 |
*/ |
726 |
{ |
727 |
off_t sbytes; |
728 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
729 |
|
730 |
if (res < 0 && sbytes) |
731 |
/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */ |
732 |
res = sbytes; |
733 |
} |
734 |
|
735 |
# elif __hpux |
736 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
737 |
|
738 |
# elif __solaris |
739 |
{ |
740 |
struct sendfilevec vec; |
741 |
size_t sbytes; |
742 |
|
743 |
vec.sfv_fd = ifd; |
744 |
vec.sfv_flag = 0; |
745 |
vec.sfv_off = offset; |
746 |
vec.sfv_len = count; |
747 |
|
748 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
749 |
|
750 |
if (res < 0 && sbytes) |
751 |
res = sbytes; |
752 |
} |
753 |
|
754 |
# endif |
755 |
#else |
756 |
res = -1; |
757 |
errno = ENOSYS; |
758 |
#endif |
759 |
|
760 |
if (res < 0 |
761 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
762 |
#if __solaris |
763 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
764 |
#endif |
765 |
) |
766 |
) |
767 |
{ |
768 |
/* emulate sendfile. this is a major pain in the ass */ |
769 |
dBUF; |
770 |
|
771 |
res = 0; |
772 |
|
773 |
while (count) |
774 |
{ |
775 |
ssize_t cnt; |
776 |
|
777 |
cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset); |
778 |
|
779 |
if (cnt <= 0) |
780 |
{ |
781 |
if (cnt && !res) res = -1; |
782 |
break; |
783 |
} |
784 |
|
785 |
cnt = write (ofd, eio_buf, cnt); |
786 |
|
787 |
if (cnt <= 0) |
788 |
{ |
789 |
if (cnt && !res) res = -1; |
790 |
break; |
791 |
} |
792 |
|
793 |
offset += cnt; |
794 |
res += cnt; |
795 |
count -= cnt; |
796 |
} |
797 |
} |
798 |
|
799 |
return res; |
800 |
} |
801 |
|
802 |
/* read a full directory */ |
803 |
static void |
804 |
eio__scandir (eio_req *req, worker *self) |
805 |
{ |
806 |
DIR *dirp; |
807 |
union |
808 |
{ |
809 |
EIO_STRUCT_DIRENT d; |
810 |
char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1]; |
811 |
} *u; |
812 |
EIO_STRUCT_DIRENT *entp; |
813 |
char *name, *names; |
814 |
int memlen = 4096; |
815 |
int memofs = 0; |
816 |
int res = 0; |
817 |
|
818 |
X_LOCK (etplock); |
819 |
self->dirp = dirp = opendir (req->ptr1); |
820 |
self->dbuf = u = malloc (sizeof (*u)); |
821 |
req->flags |= EIO_FLAG_PTR2_FREE; |
822 |
req->ptr2 = names = malloc (memlen); |
823 |
X_UNLOCK (etplock); |
824 |
|
825 |
if (dirp && u && names) |
826 |
for (;;) |
827 |
{ |
828 |
errno = 0; |
829 |
readdir_r (dirp, &u->d, &entp); |
830 |
|
831 |
if (!entp) |
832 |
break; |
833 |
|
834 |
name = entp->d_name; |
835 |
|
836 |
if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
837 |
{ |
838 |
int len = strlen (name) + 1; |
839 |
|
840 |
res++; |
841 |
|
842 |
while (memofs + len > memlen) |
843 |
{ |
844 |
memlen *= 2; |
845 |
X_LOCK (etplock); |
846 |
req->ptr2 = names = realloc (names, memlen); |
847 |
X_UNLOCK (etplock); |
848 |
|
849 |
if (!names) |
850 |
break; |
851 |
} |
852 |
|
853 |
memcpy (names + memofs, name, len); |
854 |
memofs += len; |
855 |
} |
856 |
} |
857 |
|
858 |
if (errno) |
859 |
res = -1; |
860 |
|
861 |
req->result = res; |
862 |
} |
863 |
|
864 |
/*****************************************************************************/ |
865 |
|
866 |
#define ALLOC(len) \ |
867 |
if (!req->ptr2) \ |
868 |
{ \ |
869 |
X_LOCK (etplock); \ |
870 |
req->flags |= EIO_FLAG_PTR2_FREE; \ |
871 |
X_UNLOCK (etplock); \ |
872 |
req->ptr2 = malloc (len); \ |
873 |
if (!req->ptr2) \ |
874 |
{ \ |
875 |
errno = ENOMEM; \ |
876 |
req->result = -1; \ |
877 |
break; \ |
878 |
} \ |
879 |
} |
880 |
|
881 |
X_THREAD_PROC (eio_proc) |
882 |
{ |
883 |
eio_req *req; |
884 |
struct timespec ts; |
885 |
worker *self = (worker *)thr_arg; |
886 |
|
887 |
/* try to distribute timeouts somewhat randomly */ |
888 |
ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL); |
889 |
|
890 |
for (;;) |
891 |
{ |
892 |
ts.tv_sec = time (0) + IDLE_TIMEOUT; |
893 |
|
894 |
X_LOCK (reqlock); |
895 |
|
896 |
for (;;) |
897 |
{ |
898 |
self->req = req = reqq_shift (&req_queue); |
899 |
|
900 |
if (req) |
901 |
break; |
902 |
|
903 |
++idle; |
904 |
|
905 |
if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT) |
906 |
{ |
907 |
if (idle > max_idle) |
908 |
{ |
909 |
--idle; |
910 |
X_UNLOCK (reqlock); |
911 |
X_LOCK (etplock); |
912 |
--started; |
913 |
X_UNLOCK (etplock); |
914 |
goto quit; |
915 |
} |
916 |
|
917 |
/* we are allowed to idle, so do so without any timeout */ |
918 |
X_COND_WAIT (reqwait, reqlock); |
919 |
ts.tv_sec = time (0) + IDLE_TIMEOUT; |
920 |
} |
921 |
|
922 |
--idle; |
923 |
} |
924 |
|
925 |
--nready; |
926 |
|
927 |
X_UNLOCK (reqlock); |
928 |
|
929 |
errno = 0; /* strictly unnecessary */ |
930 |
|
931 |
if (!EIO_CANCELLED (req)) |
932 |
switch (req->type) |
933 |
{ |
934 |
case EIO_READ: ALLOC (req->size); |
935 |
req->result = req->offs >= 0 |
936 |
? pread (req->int1, req->ptr2, req->size, req->offs) |
937 |
: read (req->int1, req->ptr2, req->size); break; |
938 |
case EIO_WRITE: req->result = req->offs >= 0 |
939 |
? pwrite (req->int1, req->ptr2, req->size, req->offs) |
940 |
: write (req->int1, req->ptr2, req->size); break; |
941 |
|
942 |
case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break; |
943 |
case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break; |
944 |
|
945 |
case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT)); |
946 |
req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break; |
947 |
case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); |
948 |
req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break; |
949 |
case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); |
950 |
req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break; |
951 |
|
952 |
case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break; |
953 |
case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break; |
954 |
case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break; |
955 |
case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break; |
956 |
case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break; |
957 |
case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break; |
958 |
|
959 |
case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break; |
960 |
case EIO_CLOSE: req->result = close (req->int1); break; |
961 |
case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break; |
962 |
case EIO_UNLINK: req->result = unlink (req->ptr1); break; |
963 |
case EIO_RMDIR: req->result = rmdir (req->ptr1); break; |
964 |
case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break; |
965 |
case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break; |
966 |
case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break; |
967 |
case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break; |
968 |
case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break; |
969 |
|
970 |
case EIO_READLINK: ALLOC (NAME_MAX); |
971 |
req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break; |
972 |
|
973 |
case EIO_SYNC: req->result = 0; sync (); break; |
974 |
case EIO_FSYNC: req->result = fsync (req->int1); break; |
975 |
case EIO_FDATASYNC: req->result = fdatasync (req->int1); break; |
976 |
|
977 |
case EIO_READDIR: eio__scandir (req, self); break; |
978 |
|
979 |
case EIO_BUSY: |
980 |
#ifdef _WIN32 |
981 |
Sleep (req->nv1 * 1000.); |
982 |
#else |
983 |
{ |
984 |
struct timeval tv; |
985 |
|
986 |
tv.tv_sec = req->nv1; |
987 |
tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.; |
988 |
|
989 |
req->result = select (0, 0, 0, 0, &tv); |
990 |
} |
991 |
#endif |
992 |
break; |
993 |
|
994 |
case EIO_UTIME: |
995 |
case EIO_FUTIME: |
996 |
{ |
997 |
struct timeval tv[2]; |
998 |
struct timeval *times; |
999 |
|
1000 |
if (req->nv1 != -1. || req->nv2 != -1.) |
1001 |
{ |
1002 |
tv[0].tv_sec = req->nv1; |
1003 |
tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.; |
1004 |
tv[1].tv_sec = req->nv2; |
1005 |
tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.; |
1006 |
|
1007 |
times = tv; |
1008 |
} |
1009 |
else |
1010 |
times = 0; |
1011 |
|
1012 |
|
1013 |
req->result = req->type == EIO_FUTIME |
1014 |
? futimes (req->int1, times) |
1015 |
: utimes (req->ptr1, times); |
1016 |
} |
1017 |
|
1018 |
case EIO_GROUP: |
1019 |
case EIO_NOP: |
1020 |
req->result = 0; |
1021 |
break; |
1022 |
|
1023 |
case EIO_QUIT: |
1024 |
goto quit; |
1025 |
|
1026 |
default: |
1027 |
req->result = -1; |
1028 |
break; |
1029 |
} |
1030 |
|
1031 |
req->errorno = errno; |
1032 |
|
1033 |
X_LOCK (reslock); |
1034 |
|
1035 |
++npending; |
1036 |
|
1037 |
if (!reqq_push (&res_queue, req) && etp.want_poll_cb) |
1038 |
etp.want_poll_cb (); |
1039 |
|
1040 |
self->req = 0; |
1041 |
worker_clear (self); |
1042 |
|
1043 |
X_UNLOCK (reslock); |
1044 |
} |
1045 |
|
1046 |
quit: |
1047 |
X_LOCK (etplock); |
1048 |
worker_free (self); |
1049 |
X_UNLOCK (etplock); |
1050 |
|
1051 |
return 0; |
1052 |
} |
1053 |
|
1054 |
/*****************************************************************************/ |
1055 |
|
1056 |
int eio_init (void (*want_poll)(void), void (*done_poll)(void)) |
1057 |
{ |
1058 |
etp_init (&etp, want_poll, done_poll); |
1059 |
} |
1060 |
|
1061 |
static void eio_api_destroy (eio_req *req) |
1062 |
{ |
1063 |
free (req); |
1064 |
} |
1065 |
|
1066 |
#define REQ(rtype) \ |
1067 |
eio_req *req; \ |
1068 |
\ |
1069 |
req = (eio_req *)calloc (1, sizeof *req); \ |
1070 |
if (!req) \ |
1071 |
return 0; \ |
1072 |
\ |
1073 |
req->type = rtype; \ |
1074 |
req->pri = pri; \ |
1075 |
req->finish = cb; \ |
1076 |
req->data = data; \ |
1077 |
req->destroy = eio_api_destroy; |
1078 |
|
1079 |
#define SEND eio_submit (req); return req |
1080 |
|
1081 |
#define PATH \ |
1082 |
req->flags |= EIO_FLAG_PTR1_FREE; \ |
1083 |
req->ptr1 = strdup (path); \ |
1084 |
if (!req->ptr1) \ |
1085 |
{ \ |
1086 |
eio_api_destroy (req); \ |
1087 |
return 0; \ |
1088 |
} |
1089 |
|
1090 |
#ifndef EIO_NO_WRAPPERS |
1091 |
|
1092 |
eio_req *eio_nop (int pri, eio_cb cb, void *data) |
1093 |
{ |
1094 |
REQ (EIO_NOP); SEND; |
1095 |
} |
1096 |
|
1097 |
eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data) |
1098 |
{ |
1099 |
REQ (EIO_BUSY); req->nv1 = delay; SEND; |
1100 |
} |
1101 |
|
1102 |
eio_req *eio_sync (int pri, eio_cb cb, void *data) |
1103 |
{ |
1104 |
REQ (EIO_SYNC); SEND; |
1105 |
} |
1106 |
|
1107 |
eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data) |
1108 |
{ |
1109 |
REQ (EIO_FSYNC); req->int1 = fd; SEND; |
1110 |
} |
1111 |
|
1112 |
eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data) |
1113 |
{ |
1114 |
REQ (EIO_FDATASYNC); req->int1 = fd; SEND; |
1115 |
} |
1116 |
|
1117 |
eio_req *eio_close (int fd, int pri, eio_cb cb, void *data) |
1118 |
{ |
1119 |
REQ (EIO_CLOSE); req->int1 = fd; SEND; |
1120 |
} |
1121 |
|
1122 |
eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data) |
1123 |
{ |
1124 |
REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND; |
1125 |
} |
1126 |
|
1127 |
eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data) |
1128 |
{ |
1129 |
REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND; |
1130 |
} |
1131 |
|
1132 |
eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data) |
1133 |
{ |
1134 |
REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND; |
1135 |
} |
1136 |
|
1137 |
eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data) |
1138 |
{ |
1139 |
REQ (EIO_FSTAT); req->int1 = fd; SEND; |
1140 |
} |
1141 |
|
1142 |
eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data) |
1143 |
{ |
1144 |
REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND; |
1145 |
} |
1146 |
|
1147 |
eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data) |
1148 |
{ |
1149 |
REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND; |
1150 |
} |
1151 |
|
1152 |
eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data) |
1153 |
{ |
1154 |
REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND; |
1155 |
} |
1156 |
|
1157 |
eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data) |
1158 |
{ |
1159 |
REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND; |
1160 |
} |
1161 |
|
1162 |
eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data) |
1163 |
{ |
1164 |
REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND; |
1165 |
} |
1166 |
|
1167 |
eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data) |
1168 |
{ |
1169 |
REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND; |
1170 |
} |
1171 |
|
1172 |
eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data) |
1173 |
{ |
1174 |
REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND; |
1175 |
} |
1176 |
|
1177 |
eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data) |
1178 |
{ |
1179 |
REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND; |
1180 |
} |
1181 |
|
1182 |
eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data) |
1183 |
{ |
1184 |
REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND; |
1185 |
} |
1186 |
|
1187 |
eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data) |
1188 |
{ |
1189 |
REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND; |
1190 |
} |
1191 |
|
1192 |
eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data) |
1193 |
{ |
1194 |
REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND; |
1195 |
} |
1196 |
|
1197 |
eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data) |
1198 |
{ |
1199 |
REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND; |
1200 |
} |
1201 |
|
1202 |
static eio_req * |
1203 |
eio__1path (int type, const char *path, int pri, eio_cb cb, void *data) |
1204 |
{ |
1205 |
REQ (type); PATH; SEND; |
1206 |
} |
1207 |
|
1208 |
eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data) |
1209 |
{ |
1210 |
return eio__1path (EIO_READLINK, path, pri, cb, data); |
1211 |
} |
1212 |
|
1213 |
eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data) |
1214 |
{ |
1215 |
return eio__1path (EIO_STAT, path, pri, cb, data); |
1216 |
} |
1217 |
|
1218 |
eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data) |
1219 |
{ |
1220 |
return eio__1path (EIO_LSTAT, path, pri, cb, data); |
1221 |
} |
1222 |
|
1223 |
eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data) |
1224 |
{ |
1225 |
return eio__1path (EIO_UNLINK, path, pri, cb, data); |
1226 |
} |
1227 |
|
1228 |
eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data) |
1229 |
{ |
1230 |
return eio__1path (EIO_RMDIR, path, pri, cb, data); |
1231 |
} |
1232 |
|
1233 |
eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data) |
1234 |
{ |
1235 |
return eio__1path (EIO_READDIR, path, pri, cb, data); |
1236 |
} |
1237 |
|
1238 |
eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data) |
1239 |
{ |
1240 |
REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int2 = (long)dev; SEND; |
1241 |
} |
1242 |
|
1243 |
static eio_req * |
1244 |
eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data) |
1245 |
{ |
1246 |
REQ (type); PATH; |
1247 |
|
1248 |
req->flags |= EIO_FLAG_PTR2_FREE; |
1249 |
req->ptr2 = strdup (new_path); |
1250 |
if (!req->ptr2) |
1251 |
{ |
1252 |
eio_api_destroy (req); |
1253 |
return 0; |
1254 |
} |
1255 |
|
1256 |
SEND; |
1257 |
} |
1258 |
|
1259 |
eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data) |
1260 |
{ |
1261 |
return eio__2path (EIO_LINK, path, new_path, pri, cb, data); |
1262 |
} |
1263 |
|
1264 |
eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data) |
1265 |
{ |
1266 |
return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data); |
1267 |
} |
1268 |
|
1269 |
eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data) |
1270 |
{ |
1271 |
return eio__2path (EIO_RENAME, path, new_path, pri, cb, data); |
1272 |
} |
1273 |
|
1274 |
#endif |
1275 |
|
1276 |
eio_req *eio_grp (eio_cb cb, void *data) |
1277 |
{ |
1278 |
const int pri = EIO_PRI_MAX; |
1279 |
|
1280 |
REQ (EIO_GROUP); SEND; |
1281 |
} |
1282 |
|
1283 |
#undef REQ |
1284 |
#undef PATH |
1285 |
#undef SEND |
1286 |
|
1287 |
/*****************************************************************************/ |
1288 |
/* grp functions */ |
1289 |
|
1290 |
void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit) |
1291 |
{ |
1292 |
grp->int2 = limit; |
1293 |
grp->feed = feed; |
1294 |
|
1295 |
grp_try_feed (grp); |
1296 |
} |
1297 |
|
1298 |
void eio_grp_limit (eio_req *grp, int limit) |
1299 |
{ |
1300 |
grp->int2 = limit; |
1301 |
|
1302 |
grp_try_feed (grp); |
1303 |
} |
1304 |
|
1305 |
void eio_grp_add (eio_req *grp, eio_req *req) |
1306 |
{ |
1307 |
assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2)); |
1308 |
|
1309 |
++grp->size; |
1310 |
req->grp = grp; |
1311 |
|
1312 |
req->grp_prev = 0; |
1313 |
req->grp_next = grp->grp_first; |
1314 |
|
1315 |
if (grp->grp_first) |
1316 |
grp->grp_first->grp_prev = req; |
1317 |
|
1318 |
grp->grp_first = req; |
1319 |
} |
1320 |
|
1321 |
/*****************************************************************************/ |
1322 |
/* misc garbage */ |
1323 |
|
1324 |
ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count) |
1325 |
{ |
1326 |
worker wrk; |
1327 |
|
1328 |
wrk.dbuf = 0; |
1329 |
|
1330 |
eio__sendfile (ofd, ifd, offset, count, &wrk); |
1331 |
|
1332 |
if (wrk.dbuf) |
1333 |
free (wrk.dbuf); |
1334 |
} |
1335 |
|