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