| 1 |
#define _REENTRANT 1 |
| 2 |
#include <errno.h> |
| 3 |
|
| 4 |
#include "EXTERN.h" |
| 5 |
#include "perl.h" |
| 6 |
#include "XSUB.h" |
| 7 |
|
| 8 |
#include "autoconf/config.h" |
| 9 |
|
| 10 |
#include <pthread.h> |
| 11 |
|
| 12 |
#include <stddef.h> |
| 13 |
#include <errno.h> |
| 14 |
#include <sys/time.h> |
| 15 |
#include <sys/select.h> |
| 16 |
#include <sys/types.h> |
| 17 |
#include <sys/stat.h> |
| 18 |
#include <limits.h> |
| 19 |
#include <unistd.h> |
| 20 |
#include <fcntl.h> |
| 21 |
#include <signal.h> |
| 22 |
#include <sched.h> |
| 23 |
|
| 24 |
#if HAVE_SENDFILE |
| 25 |
# if __linux |
| 26 |
# include <sys/sendfile.h> |
| 27 |
# elif __freebsd |
| 28 |
# include <sys/socket.h> |
| 29 |
# include <sys/uio.h> |
| 30 |
# elif __hpux |
| 31 |
# include <sys/socket.h> |
| 32 |
# elif __solaris /* not yet */ |
| 33 |
# include <sys/sendfile.h> |
| 34 |
# else |
| 35 |
# error sendfile support requested but not available |
| 36 |
# endif |
| 37 |
#endif |
| 38 |
|
| 39 |
/* used for struct dirent, AIX doesn't provide it */ |
| 40 |
#ifndef NAME_MAX |
| 41 |
# define NAME_MAX 4096 |
| 42 |
#endif |
| 43 |
|
| 44 |
#if __ia64 |
| 45 |
# define STACKSIZE 65536 |
| 46 |
#else |
| 47 |
# define STACKSIZE 8192 |
| 48 |
#endif |
| 49 |
|
| 50 |
enum { |
| 51 |
REQ_QUIT, |
| 52 |
REQ_OPEN, REQ_CLOSE, |
| 53 |
REQ_READ, REQ_WRITE, REQ_READAHEAD, |
| 54 |
REQ_SENDFILE, |
| 55 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, |
| 56 |
REQ_FSYNC, REQ_FDATASYNC, |
| 57 |
REQ_UNLINK, REQ_RMDIR, REQ_RENAME, |
| 58 |
REQ_READDIR, |
| 59 |
REQ_LINK, REQ_SYMLINK, |
| 60 |
REQ_SLEEP, |
| 61 |
REQ_GROUP, |
| 62 |
}; |
| 63 |
|
| 64 |
#define AIO_REQ_KLASS "IO::AIO::REQ" |
| 65 |
#define AIO_GRP_KLASS "IO::AIO::GRP" |
| 66 |
|
| 67 |
typedef struct aio_cb |
| 68 |
{ |
| 69 |
struct aio_cb *grp, *grp_prev, *grp_next; |
| 70 |
|
| 71 |
struct aio_cb *volatile next; |
| 72 |
|
| 73 |
SV *self; /* the perl counterpart of this request, if any */ |
| 74 |
|
| 75 |
SV *data, *callback; |
| 76 |
SV *fh, *fh2; |
| 77 |
void *dataptr, *data2ptr; |
| 78 |
Stat_t *statdata; |
| 79 |
off_t offset; |
| 80 |
size_t length; |
| 81 |
ssize_t result; |
| 82 |
|
| 83 |
int type; |
| 84 |
int fd, fd2; |
| 85 |
int errorno; |
| 86 |
STRLEN dataoffset; |
| 87 |
mode_t mode; /* open */ |
| 88 |
unsigned char cancelled; |
| 89 |
} aio_cb; |
| 90 |
|
| 91 |
typedef aio_cb *aio_req; |
| 92 |
typedef aio_cb *aio_req_ornot; |
| 93 |
|
| 94 |
static int started, wanted; |
| 95 |
static volatile int nreqs; |
| 96 |
static int max_outstanding = 1<<30; |
| 97 |
static int respipe [2]; |
| 98 |
|
| 99 |
static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; |
| 100 |
static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; |
| 101 |
static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
| 102 |
|
| 103 |
static volatile aio_req reqs, reqe; /* queue start, queue end */ |
| 104 |
static volatile aio_req ress, rese; /* queue start, queue end */ |
| 105 |
|
| 106 |
static void req_free (aio_req req); |
| 107 |
|
| 108 |
/* must be called at most once */ |
| 109 |
static SV *req_sv (aio_req req, const char *klass) |
| 110 |
{ |
| 111 |
req->self = (SV *)newHV (); |
| 112 |
sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0); |
| 113 |
|
| 114 |
return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1))); |
| 115 |
} |
| 116 |
|
| 117 |
static aio_req SvAIO_REQ (SV *sv) |
| 118 |
{ |
| 119 |
if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv)) |
| 120 |
croak ("object of class " AIO_REQ_KLASS " expected"); |
| 121 |
|
| 122 |
MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext); |
| 123 |
|
| 124 |
return mg ? (aio_req)mg->mg_ptr : 0; |
| 125 |
} |
| 126 |
|
| 127 |
static void poll_wait () |
| 128 |
{ |
| 129 |
if (nreqs && !ress) |
| 130 |
{ |
| 131 |
fd_set rfd; |
| 132 |
FD_ZERO(&rfd); |
| 133 |
FD_SET(respipe [0], &rfd); |
| 134 |
|
| 135 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
| 136 |
} |
| 137 |
} |
| 138 |
|
| 139 |
static void req_invoke (aio_req req) |
| 140 |
{ |
| 141 |
dSP; |
| 142 |
int errorno = errno; |
| 143 |
|
| 144 |
if (req->cancelled || !SvOK (req->callback)) |
| 145 |
return; |
| 146 |
|
| 147 |
errno = req->errorno; |
| 148 |
|
| 149 |
ENTER; |
| 150 |
PUSHMARK (SP); |
| 151 |
|
| 152 |
switch (req->type) |
| 153 |
{ |
| 154 |
case REQ_READDIR: |
| 155 |
{ |
| 156 |
SV *rv = &PL_sv_undef; |
| 157 |
|
| 158 |
if (req->result >= 0) |
| 159 |
{ |
| 160 |
char *buf = req->data2ptr; |
| 161 |
AV *av = newAV (); |
| 162 |
|
| 163 |
while (req->result) |
| 164 |
{ |
| 165 |
SV *sv = newSVpv (buf, 0); |
| 166 |
|
| 167 |
av_push (av, sv); |
| 168 |
buf += SvCUR (sv) + 1; |
| 169 |
req->result--; |
| 170 |
} |
| 171 |
|
| 172 |
rv = sv_2mortal (newRV_noinc ((SV *)av)); |
| 173 |
} |
| 174 |
|
| 175 |
XPUSHs (rv); |
| 176 |
} |
| 177 |
break; |
| 178 |
|
| 179 |
case REQ_OPEN: |
| 180 |
{ |
| 181 |
/* convert fd to fh */ |
| 182 |
SV *fh; |
| 183 |
|
| 184 |
XPUSHs (sv_2mortal (newSViv (req->result))); |
| 185 |
PUTBACK; |
| 186 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
| 187 |
SPAGAIN; |
| 188 |
|
| 189 |
fh = SvREFCNT_inc (POPs); |
| 190 |
|
| 191 |
PUSHMARK (SP); |
| 192 |
XPUSHs (sv_2mortal (fh)); |
| 193 |
} |
| 194 |
break; |
| 195 |
|
| 196 |
case REQ_SLEEP: |
| 197 |
case REQ_GROUP: |
| 198 |
break; |
| 199 |
|
| 200 |
default: |
| 201 |
XPUSHs (sv_2mortal (newSViv (req->result))); |
| 202 |
break; |
| 203 |
} |
| 204 |
|
| 205 |
|
| 206 |
PUTBACK; |
| 207 |
call_sv (req->callback, G_VOID | G_EVAL); |
| 208 |
SPAGAIN; |
| 209 |
|
| 210 |
if (SvTRUE (ERRSV)) |
| 211 |
{ |
| 212 |
req_free (req); |
| 213 |
croak (0); |
| 214 |
} |
| 215 |
|
| 216 |
LEAVE; |
| 217 |
|
| 218 |
errno = errorno; |
| 219 |
} |
| 220 |
|
| 221 |
static void req_free (aio_req req) |
| 222 |
{ |
| 223 |
if (req->grp) |
| 224 |
{ |
| 225 |
aio_req grp = req->grp; |
| 226 |
|
| 227 |
/* unlink request */ |
| 228 |
req->grp_next->grp_prev = req->grp_prev; |
| 229 |
req->grp_prev->grp_next = req->grp_next; |
| 230 |
|
| 231 |
if (grp->grp_next == grp && grp->fd) |
| 232 |
{ |
| 233 |
req_invoke (grp); |
| 234 |
req_free (grp); |
| 235 |
} |
| 236 |
} |
| 237 |
|
| 238 |
if (req->self) |
| 239 |
{ |
| 240 |
sv_unmagic (req->self, PERL_MAGIC_ext); |
| 241 |
SvREFCNT_dec (req->self); |
| 242 |
} |
| 243 |
|
| 244 |
if (req->data) |
| 245 |
SvREFCNT_dec (req->data); |
| 246 |
|
| 247 |
if (req->fh) |
| 248 |
SvREFCNT_dec (req->fh); |
| 249 |
|
| 250 |
if (req->fh2) |
| 251 |
SvREFCNT_dec (req->fh2); |
| 252 |
|
| 253 |
if (req->statdata) |
| 254 |
Safefree (req->statdata); |
| 255 |
|
| 256 |
if (req->callback) |
| 257 |
SvREFCNT_dec (req->callback); |
| 258 |
|
| 259 |
if (req->type == REQ_READDIR && req->result >= 0) |
| 260 |
free (req->data2ptr); |
| 261 |
|
| 262 |
Safefree (req); |
| 263 |
} |
| 264 |
|
| 265 |
static void req_cancel (aio_req req) |
| 266 |
{ |
| 267 |
req->cancelled = 1; |
| 268 |
|
| 269 |
if (req->type == REQ_GROUP) |
| 270 |
{ |
| 271 |
aio_req sub; |
| 272 |
|
| 273 |
for (sub = req->grp_next; sub != req; sub = sub->grp_next) |
| 274 |
req_cancel (sub); |
| 275 |
} |
| 276 |
} |
| 277 |
|
| 278 |
static int poll_cb () |
| 279 |
{ |
| 280 |
dSP; |
| 281 |
int count = 0; |
| 282 |
int do_croak = 0; |
| 283 |
aio_req req; |
| 284 |
|
| 285 |
for (;;) |
| 286 |
{ |
| 287 |
pthread_mutex_lock (&reslock); |
| 288 |
req = ress; |
| 289 |
|
| 290 |
if (req) |
| 291 |
{ |
| 292 |
ress = req->next; |
| 293 |
|
| 294 |
if (!ress) |
| 295 |
{ |
| 296 |
/* read any signals sent by the worker threads */ |
| 297 |
char buf [32]; |
| 298 |
while (read (respipe [0], buf, 32) == 32) |
| 299 |
; |
| 300 |
|
| 301 |
rese = 0; |
| 302 |
} |
| 303 |
} |
| 304 |
|
| 305 |
pthread_mutex_unlock (&reslock); |
| 306 |
|
| 307 |
if (!req) |
| 308 |
break; |
| 309 |
|
| 310 |
nreqs--; |
| 311 |
|
| 312 |
if (req->type == REQ_QUIT) |
| 313 |
started--; |
| 314 |
else if (req->type == REQ_GROUP && req->grp_next != req) |
| 315 |
{ |
| 316 |
req->fd = 1; /* mark request as delayed */ |
| 317 |
continue; |
| 318 |
} |
| 319 |
else |
| 320 |
{ |
| 321 |
if (req->type == REQ_READ) |
| 322 |
SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0)); |
| 323 |
|
| 324 |
if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE)) |
| 325 |
SvREADONLY_off (req->data); |
| 326 |
|
| 327 |
if (req->statdata) |
| 328 |
{ |
| 329 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
| 330 |
PL_laststatval = req->result; |
| 331 |
PL_statcache = *(req->statdata); |
| 332 |
} |
| 333 |
|
| 334 |
req_invoke (req); |
| 335 |
|
| 336 |
count++; |
| 337 |
} |
| 338 |
|
| 339 |
req_free (req); |
| 340 |
} |
| 341 |
|
| 342 |
return count; |
| 343 |
} |
| 344 |
|
| 345 |
static void *aio_proc(void *arg); |
| 346 |
|
| 347 |
static void start_thread (void) |
| 348 |
{ |
| 349 |
sigset_t fullsigset, oldsigset; |
| 350 |
pthread_t tid; |
| 351 |
pthread_attr_t attr; |
| 352 |
|
| 353 |
pthread_attr_init (&attr); |
| 354 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
| 355 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
| 356 |
|
| 357 |
sigfillset (&fullsigset); |
| 358 |
sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
| 359 |
|
| 360 |
if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
| 361 |
started++; |
| 362 |
|
| 363 |
sigprocmask (SIG_SETMASK, &oldsigset, 0); |
| 364 |
} |
| 365 |
|
| 366 |
static void req_send (aio_req req) |
| 367 |
{ |
| 368 |
while (started < wanted && nreqs >= started) |
| 369 |
start_thread (); |
| 370 |
|
| 371 |
nreqs++; |
| 372 |
|
| 373 |
pthread_mutex_lock (&reqlock); |
| 374 |
|
| 375 |
req->next = 0; |
| 376 |
|
| 377 |
if (reqe) |
| 378 |
{ |
| 379 |
reqe->next = req; |
| 380 |
reqe = req; |
| 381 |
} |
| 382 |
else |
| 383 |
reqe = reqs = req; |
| 384 |
|
| 385 |
pthread_cond_signal (&reqwait); |
| 386 |
pthread_mutex_unlock (&reqlock); |
| 387 |
|
| 388 |
if (nreqs > max_outstanding) |
| 389 |
for (;;) |
| 390 |
{ |
| 391 |
poll_cb (); |
| 392 |
|
| 393 |
if (nreqs <= max_outstanding) |
| 394 |
break; |
| 395 |
|
| 396 |
poll_wait (); |
| 397 |
} |
| 398 |
} |
| 399 |
|
| 400 |
static void end_thread (void) |
| 401 |
{ |
| 402 |
aio_req req; |
| 403 |
Newz (0, req, 1, aio_cb); |
| 404 |
req->type = REQ_QUIT; |
| 405 |
|
| 406 |
req_send (req); |
| 407 |
} |
| 408 |
|
| 409 |
static void min_parallel (int nthreads) |
| 410 |
{ |
| 411 |
if (wanted < nthreads) |
| 412 |
wanted = nthreads; |
| 413 |
} |
| 414 |
|
| 415 |
static void max_parallel (int nthreads) |
| 416 |
{ |
| 417 |
int cur = started; |
| 418 |
|
| 419 |
if (wanted > nthreads) |
| 420 |
wanted = nthreads; |
| 421 |
|
| 422 |
while (cur > wanted) |
| 423 |
{ |
| 424 |
end_thread (); |
| 425 |
cur--; |
| 426 |
} |
| 427 |
|
| 428 |
while (started > wanted) |
| 429 |
{ |
| 430 |
poll_wait (); |
| 431 |
poll_cb (); |
| 432 |
} |
| 433 |
} |
| 434 |
|
| 435 |
static void create_pipe () |
| 436 |
{ |
| 437 |
if (pipe (respipe)) |
| 438 |
croak ("unable to initialize result pipe"); |
| 439 |
|
| 440 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
| 441 |
croak ("cannot set result pipe to nonblocking mode"); |
| 442 |
|
| 443 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
| 444 |
croak ("cannot set result pipe to nonblocking mode"); |
| 445 |
} |
| 446 |
|
| 447 |
/*****************************************************************************/ |
| 448 |
/* work around various missing functions */ |
| 449 |
|
| 450 |
#if !HAVE_PREADWRITE |
| 451 |
# define pread aio_pread |
| 452 |
# define pwrite aio_pwrite |
| 453 |
|
| 454 |
/* |
| 455 |
* make our pread/pwrite safe against themselves, but not against |
| 456 |
* normal read/write by using a mutex. slows down execution a lot, |
| 457 |
* but that's your problem, not mine. |
| 458 |
*/ |
| 459 |
static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER; |
| 460 |
|
| 461 |
static ssize_t pread (int fd, void *buf, size_t count, off_t offset) |
| 462 |
{ |
| 463 |
ssize_t res; |
| 464 |
off_t ooffset; |
| 465 |
|
| 466 |
pthread_mutex_lock (&preadwritelock); |
| 467 |
ooffset = lseek (fd, 0, SEEK_CUR); |
| 468 |
lseek (fd, offset, SEEK_SET); |
| 469 |
res = read (fd, buf, count); |
| 470 |
lseek (fd, ooffset, SEEK_SET); |
| 471 |
pthread_mutex_unlock (&preadwritelock); |
| 472 |
|
| 473 |
return res; |
| 474 |
} |
| 475 |
|
| 476 |
static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset) |
| 477 |
{ |
| 478 |
ssize_t res; |
| 479 |
off_t ooffset; |
| 480 |
|
| 481 |
pthread_mutex_lock (&preadwritelock); |
| 482 |
ooffset = lseek (fd, 0, SEEK_CUR); |
| 483 |
lseek (fd, offset, SEEK_SET); |
| 484 |
res = write (fd, buf, count); |
| 485 |
lseek (fd, offset, SEEK_SET); |
| 486 |
pthread_mutex_unlock (&preadwritelock); |
| 487 |
|
| 488 |
return res; |
| 489 |
} |
| 490 |
#endif |
| 491 |
|
| 492 |
#if !HAVE_FDATASYNC |
| 493 |
# define fdatasync fsync |
| 494 |
#endif |
| 495 |
|
| 496 |
#if !HAVE_READAHEAD |
| 497 |
# define readahead aio_readahead |
| 498 |
|
| 499 |
static ssize_t readahead (int fd, off_t offset, size_t count) |
| 500 |
{ |
| 501 |
char readahead_buf[4096]; |
| 502 |
|
| 503 |
while (count > 0) |
| 504 |
{ |
| 505 |
size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); |
| 506 |
|
| 507 |
pread (fd, readahead_buf, len, offset); |
| 508 |
offset += len; |
| 509 |
count -= len; |
| 510 |
} |
| 511 |
|
| 512 |
errno = 0; |
| 513 |
} |
| 514 |
#endif |
| 515 |
|
| 516 |
#if !HAVE_READDIR_R |
| 517 |
# define readdir_r aio_readdir_r |
| 518 |
|
| 519 |
static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER; |
| 520 |
|
| 521 |
static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res) |
| 522 |
{ |
| 523 |
struct dirent *e; |
| 524 |
int errorno; |
| 525 |
|
| 526 |
pthread_mutex_lock (&readdirlock); |
| 527 |
|
| 528 |
e = readdir (dirp); |
| 529 |
errorno = errno; |
| 530 |
|
| 531 |
if (e) |
| 532 |
{ |
| 533 |
*res = ent; |
| 534 |
strcpy (ent->d_name, e->d_name); |
| 535 |
} |
| 536 |
else |
| 537 |
*res = 0; |
| 538 |
|
| 539 |
pthread_mutex_unlock (&readdirlock); |
| 540 |
|
| 541 |
errno = errorno; |
| 542 |
return e ? 0 : -1; |
| 543 |
} |
| 544 |
#endif |
| 545 |
|
| 546 |
/* sendfile always needs emulation */ |
| 547 |
static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count) |
| 548 |
{ |
| 549 |
ssize_t res; |
| 550 |
|
| 551 |
if (!count) |
| 552 |
return 0; |
| 553 |
|
| 554 |
#if HAVE_SENDFILE |
| 555 |
# if __linux |
| 556 |
res = sendfile (ofd, ifd, &offset, count); |
| 557 |
|
| 558 |
# elif __freebsd |
| 559 |
/* |
| 560 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
| 561 |
* wasted on making it similar to other I/O functions. |
| 562 |
*/ |
| 563 |
{ |
| 564 |
off_t sbytes; |
| 565 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
| 566 |
|
| 567 |
if (res < 0 && sbytes) |
| 568 |
/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */ |
| 569 |
res = sbytes; |
| 570 |
} |
| 571 |
|
| 572 |
# elif __hpux |
| 573 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
| 574 |
|
| 575 |
# elif __solaris |
| 576 |
{ |
| 577 |
struct sendfilevec vec; |
| 578 |
size_t sbytes; |
| 579 |
|
| 580 |
vec.sfv_fd = ifd; |
| 581 |
vec.sfv_flag = 0; |
| 582 |
vec.sfv_off = offset; |
| 583 |
vec.sfv_len = count; |
| 584 |
|
| 585 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
| 586 |
|
| 587 |
if (res < 0 && sbytes) |
| 588 |
res = sbytes; |
| 589 |
} |
| 590 |
|
| 591 |
# endif |
| 592 |
#else |
| 593 |
res = -1; |
| 594 |
errno = ENOSYS; |
| 595 |
#endif |
| 596 |
|
| 597 |
if (res < 0 |
| 598 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
| 599 |
#if __solaris |
| 600 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
| 601 |
#endif |
| 602 |
) |
| 603 |
) |
| 604 |
{ |
| 605 |
/* emulate sendfile. this is a major pain in the ass */ |
| 606 |
char buf[4096]; |
| 607 |
res = 0; |
| 608 |
|
| 609 |
while (count) |
| 610 |
{ |
| 611 |
ssize_t cnt; |
| 612 |
|
| 613 |
cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset); |
| 614 |
|
| 615 |
if (cnt <= 0) |
| 616 |
{ |
| 617 |
if (cnt && !res) res = -1; |
| 618 |
break; |
| 619 |
} |
| 620 |
|
| 621 |
cnt = write (ofd, buf, cnt); |
| 622 |
|
| 623 |
if (cnt <= 0) |
| 624 |
{ |
| 625 |
if (cnt && !res) res = -1; |
| 626 |
break; |
| 627 |
} |
| 628 |
|
| 629 |
offset += cnt; |
| 630 |
res += cnt; |
| 631 |
count -= cnt; |
| 632 |
} |
| 633 |
} |
| 634 |
|
| 635 |
return res; |
| 636 |
} |
| 637 |
|
| 638 |
/* read a full directory */ |
| 639 |
static int scandir_ (const char *path, void **namesp) |
| 640 |
{ |
| 641 |
DIR *dirp = opendir (path); |
| 642 |
union |
| 643 |
{ |
| 644 |
struct dirent d; |
| 645 |
char b [offsetof (struct dirent, d_name) + NAME_MAX + 1]; |
| 646 |
} u; |
| 647 |
struct dirent *entp; |
| 648 |
char *name, *names; |
| 649 |
int memlen = 4096; |
| 650 |
int memofs = 0; |
| 651 |
int res = 0; |
| 652 |
int errorno; |
| 653 |
|
| 654 |
if (!dirp) |
| 655 |
return -1; |
| 656 |
|
| 657 |
names = malloc (memlen); |
| 658 |
|
| 659 |
for (;;) |
| 660 |
{ |
| 661 |
errno = 0, readdir_r (dirp, &u.d, &entp); |
| 662 |
|
| 663 |
if (!entp) |
| 664 |
break; |
| 665 |
|
| 666 |
name = entp->d_name; |
| 667 |
|
| 668 |
if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
| 669 |
{ |
| 670 |
int len = strlen (name) + 1; |
| 671 |
|
| 672 |
res++; |
| 673 |
|
| 674 |
while (memofs + len > memlen) |
| 675 |
{ |
| 676 |
memlen *= 2; |
| 677 |
names = realloc (names, memlen); |
| 678 |
if (!names) |
| 679 |
break; |
| 680 |
} |
| 681 |
|
| 682 |
memcpy (names + memofs, name, len); |
| 683 |
memofs += len; |
| 684 |
} |
| 685 |
} |
| 686 |
|
| 687 |
errorno = errno; |
| 688 |
closedir (dirp); |
| 689 |
|
| 690 |
if (errorno) |
| 691 |
{ |
| 692 |
free (names); |
| 693 |
errno = errorno; |
| 694 |
res = -1; |
| 695 |
} |
| 696 |
|
| 697 |
*namesp = (void *)names; |
| 698 |
return res; |
| 699 |
} |
| 700 |
|
| 701 |
/*****************************************************************************/ |
| 702 |
|
| 703 |
static void *aio_proc (void *thr_arg) |
| 704 |
{ |
| 705 |
aio_req req; |
| 706 |
int type; |
| 707 |
|
| 708 |
do |
| 709 |
{ |
| 710 |
pthread_mutex_lock (&reqlock); |
| 711 |
|
| 712 |
for (;;) |
| 713 |
{ |
| 714 |
req = reqs; |
| 715 |
|
| 716 |
if (reqs) |
| 717 |
{ |
| 718 |
reqs = reqs->next; |
| 719 |
if (!reqs) reqe = 0; |
| 720 |
} |
| 721 |
|
| 722 |
if (req) |
| 723 |
break; |
| 724 |
|
| 725 |
pthread_cond_wait (&reqwait, &reqlock); |
| 726 |
} |
| 727 |
|
| 728 |
pthread_mutex_unlock (&reqlock); |
| 729 |
|
| 730 |
errno = 0; /* strictly unnecessary */ |
| 731 |
|
| 732 |
if (!req->cancelled) |
| 733 |
switch (req->type) |
| 734 |
{ |
| 735 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
| 736 |
case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
| 737 |
|
| 738 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
| 739 |
case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break; |
| 740 |
|
| 741 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
| 742 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
| 743 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
| 744 |
|
| 745 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
| 746 |
case REQ_CLOSE: req->result = close (req->fd); break; |
| 747 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
| 748 |
case REQ_RMDIR: req->result = rmdir (req->dataptr); break; |
| 749 |
case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break; |
| 750 |
case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break; |
| 751 |
case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; |
| 752 |
|
| 753 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
| 754 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
| 755 |
case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break; |
| 756 |
|
| 757 |
case REQ_SLEEP: |
| 758 |
{ |
| 759 |
struct timeval tv; |
| 760 |
|
| 761 |
tv.tv_sec = req->fd; |
| 762 |
tv.tv_usec = req->fd2; |
| 763 |
|
| 764 |
req->result = select (0, 0, 0, 0, &tv); |
| 765 |
} |
| 766 |
|
| 767 |
case REQ_QUIT: |
| 768 |
break; |
| 769 |
|
| 770 |
default: |
| 771 |
req->result = ENOSYS; |
| 772 |
break; |
| 773 |
} |
| 774 |
|
| 775 |
req->errorno = errno; |
| 776 |
|
| 777 |
pthread_mutex_lock (&reslock); |
| 778 |
|
| 779 |
req->next = 0; |
| 780 |
|
| 781 |
if (rese) |
| 782 |
{ |
| 783 |
rese->next = req; |
| 784 |
rese = req; |
| 785 |
} |
| 786 |
else |
| 787 |
{ |
| 788 |
rese = ress = req; |
| 789 |
|
| 790 |
/* write a dummy byte to the pipe so fh becomes ready */ |
| 791 |
write (respipe [1], &respipe, 1); |
| 792 |
} |
| 793 |
|
| 794 |
pthread_mutex_unlock (&reslock); |
| 795 |
} |
| 796 |
while (type != REQ_QUIT); |
| 797 |
|
| 798 |
return 0; |
| 799 |
} |
| 800 |
|
| 801 |
/*****************************************************************************/ |
| 802 |
|
| 803 |
static void atfork_prepare (void) |
| 804 |
{ |
| 805 |
pthread_mutex_lock (&reqlock); |
| 806 |
pthread_mutex_lock (&reslock); |
| 807 |
#if !HAVE_PREADWRITE |
| 808 |
pthread_mutex_lock (&preadwritelock); |
| 809 |
#endif |
| 810 |
#if !HAVE_READDIR_R |
| 811 |
pthread_mutex_lock (&readdirlock); |
| 812 |
#endif |
| 813 |
} |
| 814 |
|
| 815 |
static void atfork_parent (void) |
| 816 |
{ |
| 817 |
#if !HAVE_READDIR_R |
| 818 |
pthread_mutex_unlock (&readdirlock); |
| 819 |
#endif |
| 820 |
#if !HAVE_PREADWRITE |
| 821 |
pthread_mutex_unlock (&preadwritelock); |
| 822 |
#endif |
| 823 |
pthread_mutex_unlock (&reslock); |
| 824 |
pthread_mutex_unlock (&reqlock); |
| 825 |
} |
| 826 |
|
| 827 |
static void atfork_child (void) |
| 828 |
{ |
| 829 |
aio_req prv; |
| 830 |
|
| 831 |
started = 0; |
| 832 |
|
| 833 |
while (reqs) |
| 834 |
{ |
| 835 |
prv = reqs; |
| 836 |
reqs = prv->next; |
| 837 |
req_free (prv); |
| 838 |
} |
| 839 |
|
| 840 |
reqs = reqe = 0; |
| 841 |
|
| 842 |
while (ress) |
| 843 |
{ |
| 844 |
prv = ress; |
| 845 |
ress = prv->next; |
| 846 |
req_free (prv); |
| 847 |
} |
| 848 |
|
| 849 |
ress = rese = 0; |
| 850 |
|
| 851 |
close (respipe [0]); |
| 852 |
close (respipe [1]); |
| 853 |
create_pipe (); |
| 854 |
|
| 855 |
atfork_parent (); |
| 856 |
} |
| 857 |
|
| 858 |
#define dREQ \ |
| 859 |
aio_req req; \ |
| 860 |
\ |
| 861 |
if (SvOK (callback) && !SvROK (callback)) \ |
| 862 |
croak ("callback must be undef or of reference type"); \ |
| 863 |
\ |
| 864 |
Newz (0, req, 1, aio_cb); \ |
| 865 |
if (!req) \ |
| 866 |
croak ("out of memory during aio_req allocation"); \ |
| 867 |
\ |
| 868 |
req->callback = newSVsv (callback) |
| 869 |
|
| 870 |
#define REQ_SEND \ |
| 871 |
req_send (req); \ |
| 872 |
\ |
| 873 |
if (GIMME_V != G_VOID) \ |
| 874 |
XPUSHs (req_sv (req, AIO_REQ_KLASS)); |
| 875 |
|
| 876 |
MODULE = IO::AIO PACKAGE = IO::AIO |
| 877 |
|
| 878 |
PROTOTYPES: ENABLE |
| 879 |
|
| 880 |
BOOT: |
| 881 |
{ |
| 882 |
HV *stash = gv_stashpv ("IO::AIO", 1); |
| 883 |
newCONSTSUB (stash, "EXDEV", newSViv (EXDEV)); |
| 884 |
newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY)); |
| 885 |
newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY)); |
| 886 |
|
| 887 |
create_pipe (); |
| 888 |
pthread_atfork (atfork_prepare, atfork_parent, atfork_child); |
| 889 |
} |
| 890 |
|
| 891 |
void |
| 892 |
min_parallel (nthreads) |
| 893 |
int nthreads |
| 894 |
PROTOTYPE: $ |
| 895 |
|
| 896 |
void |
| 897 |
max_parallel (nthreads) |
| 898 |
int nthreads |
| 899 |
PROTOTYPE: $ |
| 900 |
|
| 901 |
int |
| 902 |
max_outstanding (nreqs) |
| 903 |
int nreqs |
| 904 |
PROTOTYPE: $ |
| 905 |
CODE: |
| 906 |
RETVAL = max_outstanding; |
| 907 |
max_outstanding = nreqs; |
| 908 |
|
| 909 |
void |
| 910 |
aio_open (pathname,flags,mode,callback=&PL_sv_undef) |
| 911 |
SV * pathname |
| 912 |
int flags |
| 913 |
int mode |
| 914 |
SV * callback |
| 915 |
PROTOTYPE: $$$;$ |
| 916 |
PPCODE: |
| 917 |
{ |
| 918 |
dREQ; |
| 919 |
|
| 920 |
req->type = REQ_OPEN; |
| 921 |
req->data = newSVsv (pathname); |
| 922 |
req->dataptr = SvPVbyte_nolen (req->data); |
| 923 |
req->fd = flags; |
| 924 |
req->mode = mode; |
| 925 |
|
| 926 |
REQ_SEND; |
| 927 |
} |
| 928 |
|
| 929 |
void |
| 930 |
aio_close (fh,callback=&PL_sv_undef) |
| 931 |
SV * fh |
| 932 |
SV * callback |
| 933 |
PROTOTYPE: $;$ |
| 934 |
ALIAS: |
| 935 |
aio_close = REQ_CLOSE |
| 936 |
aio_fsync = REQ_FSYNC |
| 937 |
aio_fdatasync = REQ_FDATASYNC |
| 938 |
PPCODE: |
| 939 |
{ |
| 940 |
dREQ; |
| 941 |
|
| 942 |
req->type = ix; |
| 943 |
req->fh = newSVsv (fh); |
| 944 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
| 945 |
|
| 946 |
REQ_SEND (req); |
| 947 |
} |
| 948 |
|
| 949 |
void |
| 950 |
aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
| 951 |
SV * fh |
| 952 |
UV offset |
| 953 |
UV length |
| 954 |
SV * data |
| 955 |
UV dataoffset |
| 956 |
SV * callback |
| 957 |
ALIAS: |
| 958 |
aio_read = REQ_READ |
| 959 |
aio_write = REQ_WRITE |
| 960 |
PROTOTYPE: $$$$$;$ |
| 961 |
PPCODE: |
| 962 |
{ |
| 963 |
aio_req req; |
| 964 |
STRLEN svlen; |
| 965 |
char *svptr = SvPVbyte (data, svlen); |
| 966 |
|
| 967 |
SvUPGRADE (data, SVt_PV); |
| 968 |
SvPOK_on (data); |
| 969 |
|
| 970 |
if (dataoffset < 0) |
| 971 |
dataoffset += svlen; |
| 972 |
|
| 973 |
if (dataoffset < 0 || dataoffset > svlen) |
| 974 |
croak ("data offset outside of string"); |
| 975 |
|
| 976 |
if (ix == REQ_WRITE) |
| 977 |
{ |
| 978 |
/* write: check length and adjust. */ |
| 979 |
if (length < 0 || length + dataoffset > svlen) |
| 980 |
length = svlen - dataoffset; |
| 981 |
} |
| 982 |
else |
| 983 |
{ |
| 984 |
/* read: grow scalar as necessary */ |
| 985 |
svptr = SvGROW (data, length + dataoffset); |
| 986 |
} |
| 987 |
|
| 988 |
if (length < 0) |
| 989 |
croak ("length must not be negative"); |
| 990 |
|
| 991 |
{ |
| 992 |
dREQ; |
| 993 |
|
| 994 |
req->type = ix; |
| 995 |
req->fh = newSVsv (fh); |
| 996 |
req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
| 997 |
: IoOFP (sv_2io (fh))); |
| 998 |
req->offset = offset; |
| 999 |
req->length = length; |
| 1000 |
req->data = SvREFCNT_inc (data); |
| 1001 |
req->dataptr = (char *)svptr + dataoffset; |
| 1002 |
|
| 1003 |
if (!SvREADONLY (data)) |
| 1004 |
{ |
| 1005 |
SvREADONLY_on (data); |
| 1006 |
req->data2ptr = (void *)data; |
| 1007 |
} |
| 1008 |
|
| 1009 |
REQ_SEND; |
| 1010 |
} |
| 1011 |
} |
| 1012 |
|
| 1013 |
void |
| 1014 |
aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef) |
| 1015 |
SV * out_fh |
| 1016 |
SV * in_fh |
| 1017 |
UV in_offset |
| 1018 |
UV length |
| 1019 |
SV * callback |
| 1020 |
PROTOTYPE: $$$$;$ |
| 1021 |
PPCODE: |
| 1022 |
{ |
| 1023 |
dREQ; |
| 1024 |
|
| 1025 |
req->type = REQ_SENDFILE; |
| 1026 |
req->fh = newSVsv (out_fh); |
| 1027 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh))); |
| 1028 |
req->fh2 = newSVsv (in_fh); |
| 1029 |
req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh))); |
| 1030 |
req->offset = in_offset; |
| 1031 |
req->length = length; |
| 1032 |
|
| 1033 |
REQ_SEND; |
| 1034 |
} |
| 1035 |
|
| 1036 |
void |
| 1037 |
aio_readahead (fh,offset,length,callback=&PL_sv_undef) |
| 1038 |
SV * fh |
| 1039 |
UV offset |
| 1040 |
IV length |
| 1041 |
SV * callback |
| 1042 |
PROTOTYPE: $$$;$ |
| 1043 |
PPCODE: |
| 1044 |
{ |
| 1045 |
dREQ; |
| 1046 |
|
| 1047 |
req->type = REQ_READAHEAD; |
| 1048 |
req->fh = newSVsv (fh); |
| 1049 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
| 1050 |
req->offset = offset; |
| 1051 |
req->length = length; |
| 1052 |
|
| 1053 |
REQ_SEND; |
| 1054 |
} |
| 1055 |
|
| 1056 |
void |
| 1057 |
aio_stat (fh_or_path,callback=&PL_sv_undef) |
| 1058 |
SV * fh_or_path |
| 1059 |
SV * callback |
| 1060 |
ALIAS: |
| 1061 |
aio_stat = REQ_STAT |
| 1062 |
aio_lstat = REQ_LSTAT |
| 1063 |
PPCODE: |
| 1064 |
{ |
| 1065 |
dREQ; |
| 1066 |
|
| 1067 |
New (0, req->statdata, 1, Stat_t); |
| 1068 |
if (!req->statdata) |
| 1069 |
{ |
| 1070 |
req_free (req); |
| 1071 |
croak ("out of memory during aio_req->statdata allocation"); |
| 1072 |
} |
| 1073 |
|
| 1074 |
if (SvPOK (fh_or_path)) |
| 1075 |
{ |
| 1076 |
req->type = ix; |
| 1077 |
req->data = newSVsv (fh_or_path); |
| 1078 |
req->dataptr = SvPVbyte_nolen (req->data); |
| 1079 |
} |
| 1080 |
else |
| 1081 |
{ |
| 1082 |
req->type = REQ_FSTAT; |
| 1083 |
req->fh = newSVsv (fh_or_path); |
| 1084 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
| 1085 |
} |
| 1086 |
|
| 1087 |
REQ_SEND; |
| 1088 |
} |
| 1089 |
|
| 1090 |
void |
| 1091 |
aio_unlink (pathname,callback=&PL_sv_undef) |
| 1092 |
SV * pathname |
| 1093 |
SV * callback |
| 1094 |
ALIAS: |
| 1095 |
aio_unlink = REQ_UNLINK |
| 1096 |
aio_rmdir = REQ_RMDIR |
| 1097 |
aio_readdir = REQ_READDIR |
| 1098 |
PPCODE: |
| 1099 |
{ |
| 1100 |
dREQ; |
| 1101 |
|
| 1102 |
req->type = ix; |
| 1103 |
req->data = newSVsv (pathname); |
| 1104 |
req->dataptr = SvPVbyte_nolen (req->data); |
| 1105 |
|
| 1106 |
REQ_SEND; |
| 1107 |
} |
| 1108 |
|
| 1109 |
void |
| 1110 |
aio_link (oldpath,newpath,callback=&PL_sv_undef) |
| 1111 |
SV * oldpath |
| 1112 |
SV * newpath |
| 1113 |
SV * callback |
| 1114 |
ALIAS: |
| 1115 |
aio_link = REQ_LINK |
| 1116 |
aio_symlink = REQ_SYMLINK |
| 1117 |
aio_rename = REQ_RENAME |
| 1118 |
PPCODE: |
| 1119 |
{ |
| 1120 |
dREQ; |
| 1121 |
|
| 1122 |
req->type = ix; |
| 1123 |
req->fh = newSVsv (oldpath); |
| 1124 |
req->data2ptr = SvPVbyte_nolen (req->fh); |
| 1125 |
req->data = newSVsv (newpath); |
| 1126 |
req->dataptr = SvPVbyte_nolen (req->data); |
| 1127 |
|
| 1128 |
REQ_SEND; |
| 1129 |
} |
| 1130 |
|
| 1131 |
void |
| 1132 |
aio_sleep (delay,callback=&PL_sv_undef) |
| 1133 |
double delay |
| 1134 |
SV * callback |
| 1135 |
PPCODE: |
| 1136 |
{ |
| 1137 |
dREQ; |
| 1138 |
|
| 1139 |
req->type = REQ_SLEEP; |
| 1140 |
req->fd = delay < 0. ? 0 : delay; |
| 1141 |
req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd); |
| 1142 |
|
| 1143 |
REQ_SEND; |
| 1144 |
} |
| 1145 |
|
| 1146 |
void |
| 1147 |
aio_group (callback=&PL_sv_undef) |
| 1148 |
SV * callback |
| 1149 |
PROTOTYPE: ;$ |
| 1150 |
PPCODE: |
| 1151 |
{ |
| 1152 |
dREQ; |
| 1153 |
req->type = REQ_GROUP; |
| 1154 |
req->grp_next = req; |
| 1155 |
req->grp_prev = req; |
| 1156 |
|
| 1157 |
req_send (req); |
| 1158 |
XPUSHs (req_sv (req, AIO_GRP_KLASS)); |
| 1159 |
} |
| 1160 |
|
| 1161 |
void |
| 1162 |
flush () |
| 1163 |
PROTOTYPE: |
| 1164 |
CODE: |
| 1165 |
while (nreqs) |
| 1166 |
{ |
| 1167 |
poll_wait (); |
| 1168 |
poll_cb (); |
| 1169 |
} |
| 1170 |
|
| 1171 |
void |
| 1172 |
poll() |
| 1173 |
PROTOTYPE: |
| 1174 |
CODE: |
| 1175 |
if (nreqs) |
| 1176 |
{ |
| 1177 |
poll_wait (); |
| 1178 |
poll_cb (); |
| 1179 |
} |
| 1180 |
|
| 1181 |
int |
| 1182 |
poll_fileno() |
| 1183 |
PROTOTYPE: |
| 1184 |
CODE: |
| 1185 |
RETVAL = respipe [0]; |
| 1186 |
OUTPUT: |
| 1187 |
RETVAL |
| 1188 |
|
| 1189 |
int |
| 1190 |
poll_cb(...) |
| 1191 |
PROTOTYPE: |
| 1192 |
CODE: |
| 1193 |
RETVAL = poll_cb (); |
| 1194 |
OUTPUT: |
| 1195 |
RETVAL |
| 1196 |
|
| 1197 |
void |
| 1198 |
poll_wait() |
| 1199 |
PROTOTYPE: |
| 1200 |
CODE: |
| 1201 |
if (nreqs) |
| 1202 |
poll_wait (); |
| 1203 |
|
| 1204 |
int |
| 1205 |
nreqs() |
| 1206 |
PROTOTYPE: |
| 1207 |
CODE: |
| 1208 |
RETVAL = nreqs; |
| 1209 |
OUTPUT: |
| 1210 |
RETVAL |
| 1211 |
|
| 1212 |
MODULE = IO::AIO PACKAGE = IO::AIO::REQ |
| 1213 |
|
| 1214 |
void |
| 1215 |
cancel (aio_req_ornot req) |
| 1216 |
PROTOTYPE: |
| 1217 |
CODE: |
| 1218 |
req_cancel (req); |
| 1219 |
|
| 1220 |
MODULE = IO::AIO PACKAGE = IO::AIO::GRP |
| 1221 |
|
| 1222 |
void |
| 1223 |
add (aio_req grp, ...) |
| 1224 |
PROTOTYPE: $;@ |
| 1225 |
PPCODE: |
| 1226 |
{ |
| 1227 |
int i; |
| 1228 |
|
| 1229 |
for (i = 1; i < items; ++i ) |
| 1230 |
{ |
| 1231 |
if (GIMME_V != G_VOID) |
| 1232 |
XPUSHs (sv_2mortal (newSVsv (ST (i)))); |
| 1233 |
|
| 1234 |
aio_req req = SvAIO_REQ (ST (i)); |
| 1235 |
printf ("req = %p\n", req);//D |
| 1236 |
|
| 1237 |
if (req) |
| 1238 |
{ |
| 1239 |
req->grp_prev = grp; |
| 1240 |
req->grp_next = grp->grp_next; |
| 1241 |
grp->grp_next->grp_prev = req; |
| 1242 |
grp->grp_next = req; |
| 1243 |
|
| 1244 |
req->grp = grp; |
| 1245 |
} |
| 1246 |
} |
| 1247 |
} |
| 1248 |
|
