| 1 |
/* solaris */ |
| 2 |
#define _POSIX_PTHREAD_SEMANTICS 1 |
| 3 |
|
| 4 |
#if __linux && !defined(_GNU_SOURCE) |
| 5 |
# define _GNU_SOURCE |
| 6 |
#endif |
| 7 |
|
| 8 |
/* just in case */ |
| 9 |
#define _REENTRANT 1 |
| 10 |
|
| 11 |
#include <errno.h> |
| 12 |
|
| 13 |
#include "EXTERN.h" |
| 14 |
#include "perl.h" |
| 15 |
#include "XSUB.h" |
| 16 |
|
| 17 |
#include "autoconf/config.h" |
| 18 |
|
| 19 |
#include <pthread.h> |
| 20 |
|
| 21 |
#include <stddef.h> |
| 22 |
#include <errno.h> |
| 23 |
#include <sys/time.h> |
| 24 |
#include <sys/select.h> |
| 25 |
#include <sys/types.h> |
| 26 |
#include <sys/stat.h> |
| 27 |
#include <limits.h> |
| 28 |
#include <unistd.h> |
| 29 |
#include <fcntl.h> |
| 30 |
#include <signal.h> |
| 31 |
#include <sched.h> |
| 32 |
|
| 33 |
#if HAVE_SENDFILE |
| 34 |
# if __linux |
| 35 |
# include <sys/sendfile.h> |
| 36 |
# elif __freebsd |
| 37 |
# include <sys/socket.h> |
| 38 |
# include <sys/uio.h> |
| 39 |
# elif __hpux |
| 40 |
# include <sys/socket.h> |
| 41 |
# elif __solaris /* not yet */ |
| 42 |
# include <sys/sendfile.h> |
| 43 |
# else |
| 44 |
# error sendfile support requested but not available |
| 45 |
# endif |
| 46 |
#endif |
| 47 |
|
| 48 |
/* number of seconds after which idle threads exit */ |
| 49 |
#define IDLE_TIMEOUT 10 |
| 50 |
|
| 51 |
/* used for struct dirent, AIX doesn't provide it */ |
| 52 |
#ifndef NAME_MAX |
| 53 |
# define NAME_MAX 4096 |
| 54 |
#endif |
| 55 |
|
| 56 |
#ifndef PTHREAD_STACK_MIN |
| 57 |
/* care for broken platforms, e.g. windows */ |
| 58 |
# define PTHREAD_STACK_MIN 16384 |
| 59 |
#endif |
| 60 |
|
| 61 |
#if __ia64 |
| 62 |
# define STACKSIZE 65536 |
| 63 |
#elif __i386 || __x86_64 /* 16k is unreasonably high :( */ |
| 64 |
# define STACKSIZE PTHREAD_STACK_MIN |
| 65 |
#else |
| 66 |
# define STACKSIZE 16384 |
| 67 |
#endif |
| 68 |
|
| 69 |
/* wether word reads are potentially non-atomic. |
| 70 |
* this is conservatice, likely most arches this runs |
| 71 |
* on have atomic word read/writes. |
| 72 |
*/ |
| 73 |
#ifndef WORDACCESS_UNSAFE |
| 74 |
# if __i386 || __x86_64 |
| 75 |
# define WORDACCESS_UNSAFE 0 |
| 76 |
# else |
| 77 |
# define WORDACCESS_UNSAFE 1 |
| 78 |
# endif |
| 79 |
#endif |
| 80 |
|
| 81 |
/* buffer size for various temporary buffers */ |
| 82 |
#define AIO_BUFSIZE 65536 |
| 83 |
|
| 84 |
#define dBUF \ |
| 85 |
char *aio_buf; \ |
| 86 |
LOCK (wrklock); \ |
| 87 |
self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \ |
| 88 |
UNLOCK (wrklock); \ |
| 89 |
if (!aio_buf) \ |
| 90 |
return -1; |
| 91 |
|
| 92 |
typedef SV SV8; /* byte-sv, used for argument-checking */ |
| 93 |
|
| 94 |
enum { |
| 95 |
REQ_QUIT, |
| 96 |
REQ_OPEN, REQ_CLOSE, |
| 97 |
REQ_READ, REQ_WRITE, REQ_READAHEAD, |
| 98 |
REQ_SENDFILE, |
| 99 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, |
| 100 |
REQ_FSYNC, REQ_FDATASYNC, |
| 101 |
REQ_UNLINK, REQ_RMDIR, REQ_RENAME, |
| 102 |
REQ_MKNOD, REQ_READDIR, |
| 103 |
REQ_LINK, REQ_SYMLINK, REQ_READLINK, |
| 104 |
REQ_GROUP, REQ_NOP, |
| 105 |
REQ_BUSY, |
| 106 |
}; |
| 107 |
|
| 108 |
#define AIO_REQ_KLASS "IO::AIO::REQ" |
| 109 |
#define AIO_GRP_KLASS "IO::AIO::GRP" |
| 110 |
|
| 111 |
typedef struct aio_cb |
| 112 |
{ |
| 113 |
struct aio_cb *volatile next; |
| 114 |
|
| 115 |
SV *callback, *fh; |
| 116 |
SV *sv1, *sv2; |
| 117 |
void *ptr1, *ptr2; |
| 118 |
off_t offs; |
| 119 |
size_t size; |
| 120 |
ssize_t result; |
| 121 |
|
| 122 |
STRLEN stroffset; |
| 123 |
int type; |
| 124 |
int int1, int2; |
| 125 |
int errorno; |
| 126 |
mode_t mode; /* open */ |
| 127 |
|
| 128 |
unsigned char flags; |
| 129 |
unsigned char pri; |
| 130 |
|
| 131 |
SV *self; /* the perl counterpart of this request, if any */ |
| 132 |
struct aio_cb *grp, *grp_prev, *grp_next, *grp_first; |
| 133 |
} aio_cb; |
| 134 |
|
| 135 |
enum { |
| 136 |
FLAG_CANCELLED = 0x01, /* request was cancelled */ |
| 137 |
FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */ |
| 138 |
FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */ |
| 139 |
}; |
| 140 |
|
| 141 |
typedef aio_cb *aio_req; |
| 142 |
typedef aio_cb *aio_req_ornot; |
| 143 |
|
| 144 |
enum { |
| 145 |
PRI_MIN = -4, |
| 146 |
PRI_MAX = 4, |
| 147 |
|
| 148 |
DEFAULT_PRI = 0, |
| 149 |
PRI_BIAS = -PRI_MIN, |
| 150 |
NUM_PRI = PRI_MAX + PRI_BIAS + 1, |
| 151 |
}; |
| 152 |
|
| 153 |
#define AIO_TICKS ((1000000 + 1023) >> 10) |
| 154 |
|
| 155 |
static unsigned int max_poll_time = 0; |
| 156 |
static unsigned int max_poll_reqs = 0; |
| 157 |
|
| 158 |
/* calculcate time difference in ~1/AIO_TICKS of a second */ |
| 159 |
static int tvdiff (struct timeval *tv1, struct timeval *tv2) |
| 160 |
{ |
| 161 |
return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS |
| 162 |
+ ((tv2->tv_usec - tv1->tv_usec) >> 10); |
| 163 |
} |
| 164 |
|
| 165 |
static int next_pri = DEFAULT_PRI + PRI_BIAS; |
| 166 |
|
| 167 |
static unsigned int started, idle, wanted; |
| 168 |
|
| 169 |
#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
| 170 |
# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
| 171 |
#else |
| 172 |
# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER |
| 173 |
#endif |
| 174 |
|
| 175 |
#define LOCK(mutex) pthread_mutex_lock (&(mutex)) |
| 176 |
#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex)) |
| 177 |
|
| 178 |
/* worker threads management */ |
| 179 |
static pthread_mutex_t wrklock = AIO_MUTEX_INIT; |
| 180 |
|
| 181 |
typedef struct worker { |
| 182 |
/* locked by wrklock */ |
| 183 |
struct worker *prev, *next; |
| 184 |
|
| 185 |
pthread_t tid; |
| 186 |
|
| 187 |
/* locked by reslock, reqlock or wrklock */ |
| 188 |
aio_req req; /* currently processed request */ |
| 189 |
void *dbuf; |
| 190 |
DIR *dirp; |
| 191 |
} worker; |
| 192 |
|
| 193 |
static worker wrk_first = { &wrk_first, &wrk_first, 0 }; |
| 194 |
|
| 195 |
static void worker_clear (worker *wrk) |
| 196 |
{ |
| 197 |
if (wrk->dirp) |
| 198 |
{ |
| 199 |
closedir (wrk->dirp); |
| 200 |
wrk->dirp = 0; |
| 201 |
} |
| 202 |
|
| 203 |
if (wrk->dbuf) |
| 204 |
{ |
| 205 |
free (wrk->dbuf); |
| 206 |
wrk->dbuf = 0; |
| 207 |
} |
| 208 |
} |
| 209 |
|
| 210 |
static void worker_free (worker *wrk) |
| 211 |
{ |
| 212 |
wrk->next->prev = wrk->prev; |
| 213 |
wrk->prev->next = wrk->next; |
| 214 |
|
| 215 |
free (wrk); |
| 216 |
} |
| 217 |
|
| 218 |
static volatile unsigned int nreqs, nready, npending; |
| 219 |
static volatile unsigned int max_idle = 4; |
| 220 |
static volatile unsigned int max_outstanding = 0xffffffff; |
| 221 |
static int respipe [2]; |
| 222 |
|
| 223 |
static pthread_mutex_t reslock = AIO_MUTEX_INIT; |
| 224 |
static pthread_mutex_t reqlock = AIO_MUTEX_INIT; |
| 225 |
static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
| 226 |
|
| 227 |
#if WORDACCESS_UNSAFE |
| 228 |
|
| 229 |
static unsigned int get_nready () |
| 230 |
{ |
| 231 |
unsigned int retval; |
| 232 |
|
| 233 |
LOCK (reqlock); |
| 234 |
retval = nready; |
| 235 |
UNLOCK (reqlock); |
| 236 |
|
| 237 |
return retval; |
| 238 |
} |
| 239 |
|
| 240 |
static unsigned int get_npending () |
| 241 |
{ |
| 242 |
unsigned int retval; |
| 243 |
|
| 244 |
LOCK (reslock); |
| 245 |
retval = npending; |
| 246 |
UNLOCK (reslock); |
| 247 |
|
| 248 |
return retval; |
| 249 |
} |
| 250 |
|
| 251 |
static unsigned int get_nthreads () |
| 252 |
{ |
| 253 |
unsigned int retval; |
| 254 |
|
| 255 |
LOCK (wrklock); |
| 256 |
retval = started; |
| 257 |
UNLOCK (wrklock); |
| 258 |
|
| 259 |
return retval; |
| 260 |
} |
| 261 |
|
| 262 |
#else |
| 263 |
|
| 264 |
# define get_nready() nready |
| 265 |
# define get_npending() npending |
| 266 |
# define get_nthreads() started |
| 267 |
|
| 268 |
#endif |
| 269 |
|
| 270 |
/* |
| 271 |
* a somewhat faster data structure might be nice, but |
| 272 |
* with 8 priorities this actually needs <20 insns |
| 273 |
* per shift, the most expensive operation. |
| 274 |
*/ |
| 275 |
typedef struct { |
| 276 |
aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */ |
| 277 |
int size; |
| 278 |
} reqq; |
| 279 |
|
| 280 |
static reqq req_queue; |
| 281 |
static reqq res_queue; |
| 282 |
|
| 283 |
int reqq_push (reqq *q, aio_req req) |
| 284 |
{ |
| 285 |
int pri = req->pri; |
| 286 |
req->next = 0; |
| 287 |
|
| 288 |
if (q->qe[pri]) |
| 289 |
{ |
| 290 |
q->qe[pri]->next = req; |
| 291 |
q->qe[pri] = req; |
| 292 |
} |
| 293 |
else |
| 294 |
q->qe[pri] = q->qs[pri] = req; |
| 295 |
|
| 296 |
return q->size++; |
| 297 |
} |
| 298 |
|
| 299 |
aio_req reqq_shift (reqq *q) |
| 300 |
{ |
| 301 |
int pri; |
| 302 |
|
| 303 |
if (!q->size) |
| 304 |
return 0; |
| 305 |
|
| 306 |
--q->size; |
| 307 |
|
| 308 |
for (pri = NUM_PRI; pri--; ) |
| 309 |
{ |
| 310 |
aio_req req = q->qs[pri]; |
| 311 |
|
| 312 |
if (req) |
| 313 |
{ |
| 314 |
if (!(q->qs[pri] = req->next)) |
| 315 |
q->qe[pri] = 0; |
| 316 |
|
| 317 |
return req; |
| 318 |
} |
| 319 |
} |
| 320 |
|
| 321 |
abort (); |
| 322 |
} |
| 323 |
|
| 324 |
static int poll_cb (); |
| 325 |
static void req_invoke (aio_req req); |
| 326 |
static void req_free (aio_req req); |
| 327 |
static void req_cancel (aio_req req); |
| 328 |
|
| 329 |
/* must be called at most once */ |
| 330 |
static SV *req_sv (aio_req req, const char *klass) |
| 331 |
{ |
| 332 |
if (!req->self) |
| 333 |
{ |
| 334 |
req->self = (SV *)newHV (); |
| 335 |
sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0); |
| 336 |
} |
| 337 |
|
| 338 |
return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1))); |
| 339 |
} |
| 340 |
|
| 341 |
static aio_req SvAIO_REQ (SV *sv) |
| 342 |
{ |
| 343 |
MAGIC *mg; |
| 344 |
|
| 345 |
if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv)) |
| 346 |
croak ("object of class " AIO_REQ_KLASS " expected"); |
| 347 |
|
| 348 |
mg = mg_find (SvRV (sv), PERL_MAGIC_ext); |
| 349 |
|
| 350 |
return mg ? (aio_req)mg->mg_ptr : 0; |
| 351 |
} |
| 352 |
|
| 353 |
static void aio_grp_feed (aio_req grp) |
| 354 |
{ |
| 355 |
while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED)) |
| 356 |
{ |
| 357 |
int old_len = grp->size; |
| 358 |
|
| 359 |
if (grp->sv2 && SvOK (grp->sv2)) |
| 360 |
{ |
| 361 |
dSP; |
| 362 |
|
| 363 |
ENTER; |
| 364 |
SAVETMPS; |
| 365 |
PUSHMARK (SP); |
| 366 |
XPUSHs (req_sv (grp, AIO_GRP_KLASS)); |
| 367 |
PUTBACK; |
| 368 |
call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR); |
| 369 |
SPAGAIN; |
| 370 |
FREETMPS; |
| 371 |
LEAVE; |
| 372 |
} |
| 373 |
|
| 374 |
/* stop if no progress has been made */ |
| 375 |
if (old_len == grp->size) |
| 376 |
{ |
| 377 |
SvREFCNT_dec (grp->sv2); |
| 378 |
grp->sv2 = 0; |
| 379 |
break; |
| 380 |
} |
| 381 |
} |
| 382 |
} |
| 383 |
|
| 384 |
static void aio_grp_dec (aio_req grp) |
| 385 |
{ |
| 386 |
--grp->size; |
| 387 |
|
| 388 |
/* call feeder, if applicable */ |
| 389 |
aio_grp_feed (grp); |
| 390 |
|
| 391 |
/* finish, if done */ |
| 392 |
if (!grp->size && grp->int1) |
| 393 |
{ |
| 394 |
req_invoke (grp); |
| 395 |
req_free (grp); |
| 396 |
} |
| 397 |
} |
| 398 |
|
| 399 |
static void req_invoke (aio_req req) |
| 400 |
{ |
| 401 |
dSP; |
| 402 |
|
| 403 |
if (req->flags & FLAG_SV1_RO_OFF) |
| 404 |
SvREADONLY_off (req->sv1); |
| 405 |
|
| 406 |
if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback)) |
| 407 |
{ |
| 408 |
ENTER; |
| 409 |
SAVETMPS; |
| 410 |
PUSHMARK (SP); |
| 411 |
EXTEND (SP, 1); |
| 412 |
|
| 413 |
switch (req->type) |
| 414 |
{ |
| 415 |
case REQ_READDIR: |
| 416 |
{ |
| 417 |
SV *rv = &PL_sv_undef; |
| 418 |
|
| 419 |
if (req->result >= 0) |
| 420 |
{ |
| 421 |
int i; |
| 422 |
char *buf = req->ptr2; |
| 423 |
AV *av = newAV (); |
| 424 |
|
| 425 |
av_extend (av, req->result - 1); |
| 426 |
|
| 427 |
for (i = 0; i < req->result; ++i) |
| 428 |
{ |
| 429 |
SV *sv = newSVpv (buf, 0); |
| 430 |
|
| 431 |
av_store (av, i, sv); |
| 432 |
buf += SvCUR (sv) + 1; |
| 433 |
} |
| 434 |
|
| 435 |
rv = sv_2mortal (newRV_noinc ((SV *)av)); |
| 436 |
} |
| 437 |
|
| 438 |
PUSHs (rv); |
| 439 |
} |
| 440 |
break; |
| 441 |
|
| 442 |
case REQ_OPEN: |
| 443 |
{ |
| 444 |
/* convert fd to fh */ |
| 445 |
SV *fh; |
| 446 |
|
| 447 |
PUSHs (sv_2mortal (newSViv (req->result))); |
| 448 |
PUTBACK; |
| 449 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
| 450 |
SPAGAIN; |
| 451 |
|
| 452 |
fh = SvREFCNT_inc (POPs); |
| 453 |
|
| 454 |
PUSHMARK (SP); |
| 455 |
XPUSHs (sv_2mortal (fh)); |
| 456 |
} |
| 457 |
break; |
| 458 |
|
| 459 |
case REQ_GROUP: |
| 460 |
req->int1 = 2; /* mark group as finished */ |
| 461 |
|
| 462 |
if (req->sv1) |
| 463 |
{ |
| 464 |
int i; |
| 465 |
AV *av = (AV *)req->sv1; |
| 466 |
|
| 467 |
EXTEND (SP, AvFILL (av) + 1); |
| 468 |
for (i = 0; i <= AvFILL (av); ++i) |
| 469 |
PUSHs (*av_fetch (av, i, 0)); |
| 470 |
} |
| 471 |
break; |
| 472 |
|
| 473 |
case REQ_NOP: |
| 474 |
case REQ_BUSY: |
| 475 |
break; |
| 476 |
|
| 477 |
case REQ_READLINK: |
| 478 |
if (req->result > 0) |
| 479 |
{ |
| 480 |
SvCUR_set (req->sv1, req->result); |
| 481 |
*SvEND (req->sv1) = 0; |
| 482 |
PUSHs (req->sv1); |
| 483 |
} |
| 484 |
break; |
| 485 |
|
| 486 |
case REQ_STAT: |
| 487 |
case REQ_LSTAT: |
| 488 |
case REQ_FSTAT: |
| 489 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
| 490 |
PL_laststatval = req->result; |
| 491 |
PL_statcache = *(Stat_t *)(req->ptr2); |
| 492 |
PUSHs (sv_2mortal (newSViv (req->result))); |
| 493 |
break; |
| 494 |
|
| 495 |
case REQ_READ: |
| 496 |
SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0)); |
| 497 |
*SvEND (req->sv1) = 0; |
| 498 |
PUSHs (sv_2mortal (newSViv (req->result))); |
| 499 |
break; |
| 500 |
|
| 501 |
default: |
| 502 |
PUSHs (sv_2mortal (newSViv (req->result))); |
| 503 |
break; |
| 504 |
} |
| 505 |
|
| 506 |
errno = req->errorno; |
| 507 |
|
| 508 |
PUTBACK; |
| 509 |
call_sv (req->callback, G_VOID | G_EVAL); |
| 510 |
SPAGAIN; |
| 511 |
|
| 512 |
FREETMPS; |
| 513 |
LEAVE; |
| 514 |
} |
| 515 |
|
| 516 |
if (req->grp) |
| 517 |
{ |
| 518 |
aio_req grp = req->grp; |
| 519 |
|
| 520 |
/* unlink request */ |
| 521 |
if (req->grp_next) req->grp_next->grp_prev = req->grp_prev; |
| 522 |
if (req->grp_prev) req->grp_prev->grp_next = req->grp_next; |
| 523 |
|
| 524 |
if (grp->grp_first == req) |
| 525 |
grp->grp_first = req->grp_next; |
| 526 |
|
| 527 |
aio_grp_dec (grp); |
| 528 |
} |
| 529 |
|
| 530 |
if (SvTRUE (ERRSV)) |
| 531 |
{ |
| 532 |
req_free (req); |
| 533 |
croak (0); |
| 534 |
} |
| 535 |
} |
| 536 |
|
| 537 |
static void req_free (aio_req req) |
| 538 |
{ |
| 539 |
if (req->self) |
| 540 |
{ |
| 541 |
sv_unmagic (req->self, PERL_MAGIC_ext); |
| 542 |
SvREFCNT_dec (req->self); |
| 543 |
} |
| 544 |
|
| 545 |
SvREFCNT_dec (req->fh); |
| 546 |
SvREFCNT_dec (req->sv1); |
| 547 |
SvREFCNT_dec (req->sv2); |
| 548 |
SvREFCNT_dec (req->callback); |
| 549 |
|
| 550 |
if (req->flags & FLAG_PTR2_FREE) |
| 551 |
free (req->ptr2); |
| 552 |
|
| 553 |
Safefree (req); |
| 554 |
} |
| 555 |
|
| 556 |
static void req_cancel_subs (aio_req grp) |
| 557 |
{ |
| 558 |
aio_req sub; |
| 559 |
|
| 560 |
if (grp->type != REQ_GROUP) |
| 561 |
return; |
| 562 |
|
| 563 |
SvREFCNT_dec (grp->sv2); |
| 564 |
grp->sv2 = 0; |
| 565 |
|
| 566 |
for (sub = grp->grp_first; sub; sub = sub->grp_next) |
| 567 |
req_cancel (sub); |
| 568 |
} |
| 569 |
|
| 570 |
static void req_cancel (aio_req req) |
| 571 |
{ |
| 572 |
req->flags |= FLAG_CANCELLED; |
| 573 |
|
| 574 |
req_cancel_subs (req); |
| 575 |
} |
| 576 |
|
| 577 |
static void *aio_proc(void *arg); |
| 578 |
|
| 579 |
static void start_thread (void) |
| 580 |
{ |
| 581 |
sigset_t fullsigset, oldsigset; |
| 582 |
pthread_attr_t attr; |
| 583 |
|
| 584 |
worker *wrk = calloc (1, sizeof (worker)); |
| 585 |
|
| 586 |
if (!wrk) |
| 587 |
croak ("unable to allocate worker thread data"); |
| 588 |
|
| 589 |
pthread_attr_init (&attr); |
| 590 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
| 591 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
| 592 |
#ifdef PTHREAD_SCOPE_PROCESS |
| 593 |
pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
| 594 |
#endif |
| 595 |
|
| 596 |
sigfillset (&fullsigset); |
| 597 |
|
| 598 |
LOCK (wrklock); |
| 599 |
sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
| 600 |
|
| 601 |
if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0) |
| 602 |
{ |
| 603 |
wrk->prev = &wrk_first; |
| 604 |
wrk->next = wrk_first.next; |
| 605 |
wrk_first.next->prev = wrk; |
| 606 |
wrk_first.next = wrk; |
| 607 |
++started; |
| 608 |
} |
| 609 |
else |
| 610 |
free (wrk); |
| 611 |
|
| 612 |
sigprocmask (SIG_SETMASK, &oldsigset, 0); |
| 613 |
UNLOCK (wrklock); |
| 614 |
} |
| 615 |
|
| 616 |
static void maybe_start_thread () |
| 617 |
{ |
| 618 |
if (get_nthreads () >= wanted) |
| 619 |
return; |
| 620 |
|
| 621 |
/* todo: maybe use idle here, but might be less exact */ |
| 622 |
if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs) |
| 623 |
return; |
| 624 |
|
| 625 |
start_thread (); |
| 626 |
} |
| 627 |
|
| 628 |
static void req_send (aio_req req) |
| 629 |
{ |
| 630 |
++nreqs; |
| 631 |
|
| 632 |
LOCK (reqlock); |
| 633 |
++nready; |
| 634 |
reqq_push (&req_queue, req); |
| 635 |
pthread_cond_signal (&reqwait); |
| 636 |
UNLOCK (reqlock); |
| 637 |
|
| 638 |
maybe_start_thread (); |
| 639 |
} |
| 640 |
|
| 641 |
static void end_thread (void) |
| 642 |
{ |
| 643 |
aio_req req; |
| 644 |
|
| 645 |
Newz (0, req, 1, aio_cb); |
| 646 |
|
| 647 |
req->type = REQ_QUIT; |
| 648 |
req->pri = PRI_MAX + PRI_BIAS; |
| 649 |
|
| 650 |
LOCK (reqlock); |
| 651 |
reqq_push (&req_queue, req); |
| 652 |
pthread_cond_signal (&reqwait); |
| 653 |
UNLOCK (reqlock); |
| 654 |
|
| 655 |
LOCK (wrklock); |
| 656 |
--started; |
| 657 |
UNLOCK (wrklock); |
| 658 |
} |
| 659 |
|
| 660 |
static void set_max_idle (int nthreads) |
| 661 |
{ |
| 662 |
if (WORDACCESS_UNSAFE) LOCK (reqlock); |
| 663 |
max_idle = nthreads <= 0 ? 1 : nthreads; |
| 664 |
if (WORDACCESS_UNSAFE) UNLOCK (reqlock); |
| 665 |
} |
| 666 |
|
| 667 |
static void min_parallel (int nthreads) |
| 668 |
{ |
| 669 |
if (wanted < nthreads) |
| 670 |
wanted = nthreads; |
| 671 |
} |
| 672 |
|
| 673 |
static void max_parallel (int nthreads) |
| 674 |
{ |
| 675 |
if (wanted > nthreads) |
| 676 |
wanted = nthreads; |
| 677 |
|
| 678 |
while (started > wanted) |
| 679 |
end_thread (); |
| 680 |
} |
| 681 |
|
| 682 |
static void poll_wait () |
| 683 |
{ |
| 684 |
fd_set rfd; |
| 685 |
|
| 686 |
while (nreqs) |
| 687 |
{ |
| 688 |
int size; |
| 689 |
if (WORDACCESS_UNSAFE) LOCK (reslock); |
| 690 |
size = res_queue.size; |
| 691 |
if (WORDACCESS_UNSAFE) UNLOCK (reslock); |
| 692 |
|
| 693 |
if (size) |
| 694 |
return; |
| 695 |
|
| 696 |
maybe_start_thread (); |
| 697 |
|
| 698 |
FD_ZERO(&rfd); |
| 699 |
FD_SET(respipe [0], &rfd); |
| 700 |
|
| 701 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
| 702 |
} |
| 703 |
} |
| 704 |
|
| 705 |
static int poll_cb () |
| 706 |
{ |
| 707 |
dSP; |
| 708 |
int count = 0; |
| 709 |
int maxreqs = max_poll_reqs; |
| 710 |
int do_croak = 0; |
| 711 |
struct timeval tv_start, tv_now; |
| 712 |
aio_req req; |
| 713 |
|
| 714 |
if (max_poll_time) |
| 715 |
gettimeofday (&tv_start, 0); |
| 716 |
|
| 717 |
for (;;) |
| 718 |
{ |
| 719 |
for (;;) |
| 720 |
{ |
| 721 |
maybe_start_thread (); |
| 722 |
|
| 723 |
LOCK (reslock); |
| 724 |
req = reqq_shift (&res_queue); |
| 725 |
|
| 726 |
if (req) |
| 727 |
{ |
| 728 |
--npending; |
| 729 |
|
| 730 |
if (!res_queue.size) |
| 731 |
{ |
| 732 |
/* read any signals sent by the worker threads */ |
| 733 |
char buf [32]; |
| 734 |
while (read (respipe [0], buf, 32) == 32) |
| 735 |
; |
| 736 |
} |
| 737 |
} |
| 738 |
|
| 739 |
UNLOCK (reslock); |
| 740 |
|
| 741 |
if (!req) |
| 742 |
break; |
| 743 |
|
| 744 |
--nreqs; |
| 745 |
|
| 746 |
if (req->type == REQ_GROUP && req->size) |
| 747 |
{ |
| 748 |
req->int1 = 1; /* mark request as delayed */ |
| 749 |
continue; |
| 750 |
} |
| 751 |
else |
| 752 |
{ |
| 753 |
req_invoke (req); |
| 754 |
|
| 755 |
count++; |
| 756 |
} |
| 757 |
|
| 758 |
req_free (req); |
| 759 |
|
| 760 |
if (maxreqs && !--maxreqs) |
| 761 |
break; |
| 762 |
|
| 763 |
if (max_poll_time) |
| 764 |
{ |
| 765 |
gettimeofday (&tv_now, 0); |
| 766 |
|
| 767 |
if (tvdiff (&tv_start, &tv_now) >= max_poll_time) |
| 768 |
break; |
| 769 |
} |
| 770 |
} |
| 771 |
|
| 772 |
if (nreqs <= max_outstanding) |
| 773 |
break; |
| 774 |
|
| 775 |
poll_wait (); |
| 776 |
|
| 777 |
++maxreqs; |
| 778 |
} |
| 779 |
|
| 780 |
return count; |
| 781 |
} |
| 782 |
|
| 783 |
static void create_pipe () |
| 784 |
{ |
| 785 |
if (pipe (respipe)) |
| 786 |
croak ("unable to initialize result pipe"); |
| 787 |
|
| 788 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
| 789 |
croak ("cannot set result pipe to nonblocking mode"); |
| 790 |
|
| 791 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
| 792 |
croak ("cannot set result pipe to nonblocking mode"); |
| 793 |
} |
| 794 |
|
| 795 |
/*****************************************************************************/ |
| 796 |
/* work around various missing functions */ |
| 797 |
|
| 798 |
#if !HAVE_PREADWRITE |
| 799 |
# define pread aio_pread |
| 800 |
# define pwrite aio_pwrite |
| 801 |
|
| 802 |
/* |
| 803 |
* make our pread/pwrite safe against themselves, but not against |
| 804 |
* normal read/write by using a mutex. slows down execution a lot, |
| 805 |
* but that's your problem, not mine. |
| 806 |
*/ |
| 807 |
static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER; |
| 808 |
|
| 809 |
static ssize_t pread (int fd, void *buf, size_t count, off_t offset) |
| 810 |
{ |
| 811 |
ssize_t res; |
| 812 |
off_t ooffset; |
| 813 |
|
| 814 |
LOCK (preadwritelock); |
| 815 |
ooffset = lseek (fd, 0, SEEK_CUR); |
| 816 |
lseek (fd, offset, SEEK_SET); |
| 817 |
res = read (fd, buf, count); |
| 818 |
lseek (fd, ooffset, SEEK_SET); |
| 819 |
UNLOCK (preadwritelock); |
| 820 |
|
| 821 |
return res; |
| 822 |
} |
| 823 |
|
| 824 |
static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset) |
| 825 |
{ |
| 826 |
ssize_t res; |
| 827 |
off_t ooffset; |
| 828 |
|
| 829 |
LOCK (preadwritelock); |
| 830 |
ooffset = lseek (fd, 0, SEEK_CUR); |
| 831 |
lseek (fd, offset, SEEK_SET); |
| 832 |
res = write (fd, buf, count); |
| 833 |
lseek (fd, offset, SEEK_SET); |
| 834 |
UNLOCK (preadwritelock); |
| 835 |
|
| 836 |
return res; |
| 837 |
} |
| 838 |
#endif |
| 839 |
|
| 840 |
#if !HAVE_FDATASYNC |
| 841 |
# define fdatasync fsync |
| 842 |
#endif |
| 843 |
|
| 844 |
#if !HAVE_READAHEAD |
| 845 |
# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self) |
| 846 |
|
| 847 |
static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self) |
| 848 |
{ |
| 849 |
dBUF; |
| 850 |
|
| 851 |
while (count > 0) |
| 852 |
{ |
| 853 |
size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE; |
| 854 |
|
| 855 |
pread (fd, aio_buf, len, offset); |
| 856 |
offset += len; |
| 857 |
count -= len; |
| 858 |
} |
| 859 |
|
| 860 |
errno = 0; |
| 861 |
} |
| 862 |
|
| 863 |
#endif |
| 864 |
|
| 865 |
#if !HAVE_READDIR_R |
| 866 |
# define readdir_r aio_readdir_r |
| 867 |
|
| 868 |
static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER; |
| 869 |
|
| 870 |
static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res) |
| 871 |
{ |
| 872 |
struct dirent *e; |
| 873 |
int errorno; |
| 874 |
|
| 875 |
LOCK (readdirlock); |
| 876 |
|
| 877 |
e = readdir (dirp); |
| 878 |
errorno = errno; |
| 879 |
|
| 880 |
if (e) |
| 881 |
{ |
| 882 |
*res = ent; |
| 883 |
strcpy (ent->d_name, e->d_name); |
| 884 |
} |
| 885 |
else |
| 886 |
*res = 0; |
| 887 |
|
| 888 |
UNLOCK (readdirlock); |
| 889 |
|
| 890 |
errno = errorno; |
| 891 |
return e ? 0 : -1; |
| 892 |
} |
| 893 |
#endif |
| 894 |
|
| 895 |
/* sendfile always needs emulation */ |
| 896 |
static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self) |
| 897 |
{ |
| 898 |
ssize_t res; |
| 899 |
|
| 900 |
if (!count) |
| 901 |
return 0; |
| 902 |
|
| 903 |
#if HAVE_SENDFILE |
| 904 |
# if __linux |
| 905 |
res = sendfile (ofd, ifd, &offset, count); |
| 906 |
|
| 907 |
# elif __freebsd |
| 908 |
/* |
| 909 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
| 910 |
* wasted on making it similar to other I/O functions. |
| 911 |
*/ |
| 912 |
{ |
| 913 |
off_t sbytes; |
| 914 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
| 915 |
|
| 916 |
if (res < 0 && sbytes) |
| 917 |
/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */ |
| 918 |
res = sbytes; |
| 919 |
} |
| 920 |
|
| 921 |
# elif __hpux |
| 922 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
| 923 |
|
| 924 |
# elif __solaris |
| 925 |
{ |
| 926 |
struct sendfilevec vec; |
| 927 |
size_t sbytes; |
| 928 |
|
| 929 |
vec.sfv_fd = ifd; |
| 930 |
vec.sfv_flag = 0; |
| 931 |
vec.sfv_off = offset; |
| 932 |
vec.sfv_len = count; |
| 933 |
|
| 934 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
| 935 |
|
| 936 |
if (res < 0 && sbytes) |
| 937 |
res = sbytes; |
| 938 |
} |
| 939 |
|
| 940 |
# endif |
| 941 |
#else |
| 942 |
res = -1; |
| 943 |
errno = ENOSYS; |
| 944 |
#endif |
| 945 |
|
| 946 |
if (res < 0 |
| 947 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
| 948 |
#if __solaris |
| 949 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
| 950 |
#endif |
| 951 |
) |
| 952 |
) |
| 953 |
{ |
| 954 |
/* emulate sendfile. this is a major pain in the ass */ |
| 955 |
dBUF; |
| 956 |
|
| 957 |
res = 0; |
| 958 |
|
| 959 |
while (count) |
| 960 |
{ |
| 961 |
ssize_t cnt; |
| 962 |
|
| 963 |
cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset); |
| 964 |
|
| 965 |
if (cnt <= 0) |
| 966 |
{ |
| 967 |
if (cnt && !res) res = -1; |
| 968 |
break; |
| 969 |
} |
| 970 |
|
| 971 |
cnt = write (ofd, aio_buf, cnt); |
| 972 |
|
| 973 |
if (cnt <= 0) |
| 974 |
{ |
| 975 |
if (cnt && !res) res = -1; |
| 976 |
break; |
| 977 |
} |
| 978 |
|
| 979 |
offset += cnt; |
| 980 |
res += cnt; |
| 981 |
count -= cnt; |
| 982 |
} |
| 983 |
} |
| 984 |
|
| 985 |
return res; |
| 986 |
} |
| 987 |
|
| 988 |
/* read a full directory */ |
| 989 |
static void scandir_ (aio_req req, worker *self) |
| 990 |
{ |
| 991 |
DIR *dirp; |
| 992 |
union |
| 993 |
{ |
| 994 |
struct dirent d; |
| 995 |
char b [offsetof (struct dirent, d_name) + NAME_MAX + 1]; |
| 996 |
} *u; |
| 997 |
struct dirent *entp; |
| 998 |
char *name, *names; |
| 999 |
int memlen = 4096; |
| 1000 |
int memofs = 0; |
| 1001 |
int res = 0; |
| 1002 |
int errorno; |
| 1003 |
|
| 1004 |
LOCK (wrklock); |
| 1005 |
self->dirp = dirp = opendir (req->ptr1); |
| 1006 |
self->dbuf = u = malloc (sizeof (*u)); |
| 1007 |
req->flags |= FLAG_PTR2_FREE; |
| 1008 |
req->ptr2 = names = malloc (memlen); |
| 1009 |
UNLOCK (wrklock); |
| 1010 |
|
| 1011 |
if (dirp && u && names) |
| 1012 |
for (;;) |
| 1013 |
{ |
| 1014 |
errno = 0; |
| 1015 |
readdir_r (dirp, &u->d, &entp); |
| 1016 |
|
| 1017 |
if (!entp) |
| 1018 |
break; |
| 1019 |
|
| 1020 |
name = entp->d_name; |
| 1021 |
|
| 1022 |
if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
| 1023 |
{ |
| 1024 |
int len = strlen (name) + 1; |
| 1025 |
|
| 1026 |
res++; |
| 1027 |
|
| 1028 |
while (memofs + len > memlen) |
| 1029 |
{ |
| 1030 |
memlen *= 2; |
| 1031 |
LOCK (wrklock); |
| 1032 |
req->ptr2 = names = realloc (names, memlen); |
| 1033 |
UNLOCK (wrklock); |
| 1034 |
|
| 1035 |
if (!names) |
| 1036 |
break; |
| 1037 |
} |
| 1038 |
|
| 1039 |
memcpy (names + memofs, name, len); |
| 1040 |
memofs += len; |
| 1041 |
} |
| 1042 |
} |
| 1043 |
|
| 1044 |
if (errno) |
| 1045 |
res = -1; |
| 1046 |
|
| 1047 |
req->result = res; |
| 1048 |
} |
| 1049 |
|
| 1050 |
/*****************************************************************************/ |
| 1051 |
|
| 1052 |
static void *aio_proc (void *thr_arg) |
| 1053 |
{ |
| 1054 |
aio_req req; |
| 1055 |
struct timespec ts; |
| 1056 |
worker *self = (worker *)thr_arg; |
| 1057 |
|
| 1058 |
/* try to distribute timeouts somewhat evenly */ |
| 1059 |
ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL) |
| 1060 |
* (1000000000UL / 1024UL); |
| 1061 |
|
| 1062 |
for (;;) |
| 1063 |
{ |
| 1064 |
ts.tv_sec = time (0) + IDLE_TIMEOUT; |
| 1065 |
|
| 1066 |
LOCK (reqlock); |
| 1067 |
|
| 1068 |
for (;;) |
| 1069 |
{ |
| 1070 |
self->req = req = reqq_shift (&req_queue); |
| 1071 |
|
| 1072 |
if (req) |
| 1073 |
break; |
| 1074 |
|
| 1075 |
++idle; |
| 1076 |
|
| 1077 |
if (pthread_cond_timedwait (&reqwait, &reqlock, &ts) |
| 1078 |
== ETIMEDOUT) |
| 1079 |
{ |
| 1080 |
if (idle > max_idle) |
| 1081 |
{ |
| 1082 |
--idle; |
| 1083 |
UNLOCK (reqlock); |
| 1084 |
LOCK (wrklock); |
| 1085 |
--started; |
| 1086 |
UNLOCK (wrklock); |
| 1087 |
goto quit; |
| 1088 |
} |
| 1089 |
|
| 1090 |
/* we are allowed to idle, so do so without any timeout */ |
| 1091 |
pthread_cond_wait (&reqwait, &reqlock); |
| 1092 |
ts.tv_sec = time (0) + IDLE_TIMEOUT; |
| 1093 |
} |
| 1094 |
|
| 1095 |
--idle; |
| 1096 |
} |
| 1097 |
|
| 1098 |
--nready; |
| 1099 |
|
| 1100 |
UNLOCK (reqlock); |
| 1101 |
|
| 1102 |
errno = 0; /* strictly unnecessary */ |
| 1103 |
|
| 1104 |
if (!(req->flags & FLAG_CANCELLED)) |
| 1105 |
switch (req->type) |
| 1106 |
{ |
| 1107 |
case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break; |
| 1108 |
case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break; |
| 1109 |
|
| 1110 |
case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break; |
| 1111 |
case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break; |
| 1112 |
|
| 1113 |
case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break; |
| 1114 |
case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break; |
| 1115 |
case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break; |
| 1116 |
|
| 1117 |
case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break; |
| 1118 |
case REQ_CLOSE: req->result = close (req->int1); break; |
| 1119 |
case REQ_UNLINK: req->result = unlink (req->ptr1); break; |
| 1120 |
case REQ_RMDIR: req->result = rmdir (req->ptr1); break; |
| 1121 |
case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break; |
| 1122 |
case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break; |
| 1123 |
case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break; |
| 1124 |
case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break; |
| 1125 |
case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break; |
| 1126 |
|
| 1127 |
case REQ_FDATASYNC: req->result = fdatasync (req->int1); break; |
| 1128 |
case REQ_FSYNC: req->result = fsync (req->int1); break; |
| 1129 |
case REQ_READDIR: scandir_ (req, self); break; |
| 1130 |
|
| 1131 |
case REQ_BUSY: |
| 1132 |
{ |
| 1133 |
struct timeval tv; |
| 1134 |
|
| 1135 |
tv.tv_sec = req->int1; |
| 1136 |
tv.tv_usec = req->int2; |
| 1137 |
|
| 1138 |
req->result = select (0, 0, 0, 0, &tv); |
| 1139 |
} |
| 1140 |
|
| 1141 |
case REQ_GROUP: |
| 1142 |
case REQ_NOP: |
| 1143 |
break; |
| 1144 |
|
| 1145 |
case REQ_QUIT: |
| 1146 |
goto quit; |
| 1147 |
|
| 1148 |
default: |
| 1149 |
req->result = ENOSYS; |
| 1150 |
break; |
| 1151 |
} |
| 1152 |
|
| 1153 |
req->errorno = errno; |
| 1154 |
|
| 1155 |
LOCK (reslock); |
| 1156 |
|
| 1157 |
++npending; |
| 1158 |
|
| 1159 |
if (!reqq_push (&res_queue, req)) |
| 1160 |
/* write a dummy byte to the pipe so fh becomes ready */ |
| 1161 |
write (respipe [1], &respipe, 1); |
| 1162 |
|
| 1163 |
self->req = 0; |
| 1164 |
worker_clear (self); |
| 1165 |
|
| 1166 |
UNLOCK (reslock); |
| 1167 |
} |
| 1168 |
|
| 1169 |
quit: |
| 1170 |
LOCK (wrklock); |
| 1171 |
worker_free (self); |
| 1172 |
UNLOCK (wrklock); |
| 1173 |
|
| 1174 |
return 0; |
| 1175 |
} |
| 1176 |
|
| 1177 |
/*****************************************************************************/ |
| 1178 |
|
| 1179 |
static void atfork_prepare (void) |
| 1180 |
{ |
| 1181 |
LOCK (wrklock); |
| 1182 |
LOCK (reqlock); |
| 1183 |
LOCK (reslock); |
| 1184 |
#if !HAVE_PREADWRITE |
| 1185 |
LOCK (preadwritelock); |
| 1186 |
#endif |
| 1187 |
#if !HAVE_READDIR_R |
| 1188 |
LOCK (readdirlock); |
| 1189 |
#endif |
| 1190 |
} |
| 1191 |
|
| 1192 |
static void atfork_parent (void) |
| 1193 |
{ |
| 1194 |
#if !HAVE_READDIR_R |
| 1195 |
UNLOCK (readdirlock); |
| 1196 |
#endif |
| 1197 |
#if !HAVE_PREADWRITE |
| 1198 |
UNLOCK (preadwritelock); |
| 1199 |
#endif |
| 1200 |
UNLOCK (reslock); |
| 1201 |
UNLOCK (reqlock); |
| 1202 |
UNLOCK (wrklock); |
| 1203 |
} |
| 1204 |
|
| 1205 |
static void atfork_child (void) |
| 1206 |
{ |
| 1207 |
aio_req prv; |
| 1208 |
|
| 1209 |
while (prv = reqq_shift (&req_queue)) |
| 1210 |
req_free (prv); |
| 1211 |
|
| 1212 |
while (prv = reqq_shift (&res_queue)) |
| 1213 |
req_free (prv); |
| 1214 |
|
| 1215 |
while (wrk_first.next != &wrk_first) |
| 1216 |
{ |
| 1217 |
worker *wrk = wrk_first.next; |
| 1218 |
|
| 1219 |
if (wrk->req) |
| 1220 |
req_free (wrk->req); |
| 1221 |
|
| 1222 |
worker_clear (wrk); |
| 1223 |
worker_free (wrk); |
| 1224 |
} |
| 1225 |
|
| 1226 |
started = 0; |
| 1227 |
idle = 0; |
| 1228 |
nreqs = 0; |
| 1229 |
nready = 0; |
| 1230 |
npending = 0; |
| 1231 |
|
| 1232 |
close (respipe [0]); |
| 1233 |
close (respipe [1]); |
| 1234 |
create_pipe (); |
| 1235 |
|
| 1236 |
atfork_parent (); |
| 1237 |
} |
| 1238 |
|
| 1239 |
#define dREQ \ |
| 1240 |
aio_req req; \ |
| 1241 |
int req_pri = next_pri; \ |
| 1242 |
next_pri = DEFAULT_PRI + PRI_BIAS; \ |
| 1243 |
\ |
| 1244 |
if (SvOK (callback) && !SvROK (callback)) \ |
| 1245 |
croak ("callback must be undef or of reference type"); \ |
| 1246 |
\ |
| 1247 |
Newz (0, req, 1, aio_cb); \ |
| 1248 |
if (!req) \ |
| 1249 |
croak ("out of memory during aio_req allocation"); \ |
| 1250 |
\ |
| 1251 |
req->callback = newSVsv (callback); \ |
| 1252 |
req->pri = req_pri |
| 1253 |
|
| 1254 |
#define REQ_SEND \ |
| 1255 |
req_send (req); \ |
| 1256 |
\ |
| 1257 |
if (GIMME_V != G_VOID) \ |
| 1258 |
XPUSHs (req_sv (req, AIO_REQ_KLASS)); |
| 1259 |
|
| 1260 |
MODULE = IO::AIO PACKAGE = IO::AIO |
| 1261 |
|
| 1262 |
PROTOTYPES: ENABLE |
| 1263 |
|
| 1264 |
BOOT: |
| 1265 |
{ |
| 1266 |
HV *stash = gv_stashpv ("IO::AIO", 1); |
| 1267 |
|
| 1268 |
newCONSTSUB (stash, "EXDEV", newSViv (EXDEV)); |
| 1269 |
newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY)); |
| 1270 |
newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY)); |
| 1271 |
newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT)); |
| 1272 |
newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC)); |
| 1273 |
newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO)); |
| 1274 |
|
| 1275 |
create_pipe (); |
| 1276 |
pthread_atfork (atfork_prepare, atfork_parent, atfork_child); |
| 1277 |
} |
| 1278 |
|
| 1279 |
void |
| 1280 |
max_poll_reqs (int nreqs) |
| 1281 |
PROTOTYPE: $ |
| 1282 |
CODE: |
| 1283 |
max_poll_reqs = nreqs; |
| 1284 |
|
| 1285 |
void |
| 1286 |
max_poll_time (double nseconds) |
| 1287 |
PROTOTYPE: $ |
| 1288 |
CODE: |
| 1289 |
max_poll_time = nseconds * AIO_TICKS; |
| 1290 |
|
| 1291 |
void |
| 1292 |
min_parallel (int nthreads) |
| 1293 |
PROTOTYPE: $ |
| 1294 |
|
| 1295 |
void |
| 1296 |
max_parallel (int nthreads) |
| 1297 |
PROTOTYPE: $ |
| 1298 |
|
| 1299 |
void |
| 1300 |
max_idle (int nthreads) |
| 1301 |
PROTOTYPE: $ |
| 1302 |
CODE: |
| 1303 |
set_max_idle (nthreads); |
| 1304 |
|
| 1305 |
int |
| 1306 |
max_outstanding (int maxreqs) |
| 1307 |
PROTOTYPE: $ |
| 1308 |
CODE: |
| 1309 |
RETVAL = max_outstanding; |
| 1310 |
max_outstanding = maxreqs; |
| 1311 |
OUTPUT: |
| 1312 |
RETVAL |
| 1313 |
|
| 1314 |
void |
| 1315 |
aio_open (pathname,flags,mode,callback=&PL_sv_undef) |
| 1316 |
SV8 * pathname |
| 1317 |
int flags |
| 1318 |
int mode |
| 1319 |
SV * callback |
| 1320 |
PROTOTYPE: $$$;$ |
| 1321 |
PPCODE: |
| 1322 |
{ |
| 1323 |
dREQ; |
| 1324 |
|
| 1325 |
req->type = REQ_OPEN; |
| 1326 |
req->sv1 = newSVsv (pathname); |
| 1327 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
| 1328 |
req->int1 = flags; |
| 1329 |
req->mode = mode; |
| 1330 |
|
| 1331 |
REQ_SEND; |
| 1332 |
} |
| 1333 |
|
| 1334 |
void |
| 1335 |
aio_close (fh,callback=&PL_sv_undef) |
| 1336 |
SV * fh |
| 1337 |
SV * callback |
| 1338 |
PROTOTYPE: $;$ |
| 1339 |
ALIAS: |
| 1340 |
aio_close = REQ_CLOSE |
| 1341 |
aio_fsync = REQ_FSYNC |
| 1342 |
aio_fdatasync = REQ_FDATASYNC |
| 1343 |
PPCODE: |
| 1344 |
{ |
| 1345 |
dREQ; |
| 1346 |
|
| 1347 |
req->type = ix; |
| 1348 |
req->fh = newSVsv (fh); |
| 1349 |
req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh))); |
| 1350 |
|
| 1351 |
REQ_SEND (req); |
| 1352 |
} |
| 1353 |
|
| 1354 |
void |
| 1355 |
aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
| 1356 |
SV * fh |
| 1357 |
UV offset |
| 1358 |
UV length |
| 1359 |
SV8 * data |
| 1360 |
UV dataoffset |
| 1361 |
SV * callback |
| 1362 |
ALIAS: |
| 1363 |
aio_read = REQ_READ |
| 1364 |
aio_write = REQ_WRITE |
| 1365 |
PROTOTYPE: $$$$$;$ |
| 1366 |
PPCODE: |
| 1367 |
{ |
| 1368 |
STRLEN svlen; |
| 1369 |
char *svptr = SvPVbyte (data, svlen); |
| 1370 |
|
| 1371 |
SvUPGRADE (data, SVt_PV); |
| 1372 |
SvPOK_on (data); |
| 1373 |
|
| 1374 |
if (dataoffset < 0) |
| 1375 |
dataoffset += svlen; |
| 1376 |
|
| 1377 |
if (dataoffset < 0 || dataoffset > svlen) |
| 1378 |
croak ("data offset outside of string"); |
| 1379 |
|
| 1380 |
if (ix == REQ_WRITE) |
| 1381 |
{ |
| 1382 |
/* write: check length and adjust. */ |
| 1383 |
if (length < 0 || length + dataoffset > svlen) |
| 1384 |
length = svlen - dataoffset; |
| 1385 |
} |
| 1386 |
else |
| 1387 |
{ |
| 1388 |
/* read: grow scalar as necessary */ |
| 1389 |
svptr = SvGROW (data, length + dataoffset); |
| 1390 |
} |
| 1391 |
|
| 1392 |
if (length < 0) |
| 1393 |
croak ("length must not be negative"); |
| 1394 |
|
| 1395 |
{ |
| 1396 |
dREQ; |
| 1397 |
|
| 1398 |
req->type = ix; |
| 1399 |
req->fh = newSVsv (fh); |
| 1400 |
req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
| 1401 |
: IoOFP (sv_2io (fh))); |
| 1402 |
req->offs = offset; |
| 1403 |
req->size = length; |
| 1404 |
req->sv1 = SvREFCNT_inc (data); |
| 1405 |
req->ptr1 = (char *)svptr + dataoffset; |
| 1406 |
req->stroffset = dataoffset; |
| 1407 |
|
| 1408 |
if (!SvREADONLY (data)) |
| 1409 |
{ |
| 1410 |
SvREADONLY_on (data); |
| 1411 |
req->flags |= FLAG_SV1_RO_OFF; |
| 1412 |
} |
| 1413 |
|
| 1414 |
REQ_SEND; |
| 1415 |
} |
| 1416 |
} |
| 1417 |
|
| 1418 |
void |
| 1419 |
aio_readlink (path,callback=&PL_sv_undef) |
| 1420 |
SV8 * path |
| 1421 |
SV * callback |
| 1422 |
PROTOTYPE: $$;$ |
| 1423 |
PPCODE: |
| 1424 |
{ |
| 1425 |
SV *data; |
| 1426 |
dREQ; |
| 1427 |
|
| 1428 |
data = newSV (NAME_MAX); |
| 1429 |
SvPOK_on (data); |
| 1430 |
|
| 1431 |
req->type = REQ_READLINK; |
| 1432 |
req->fh = newSVsv (path); |
| 1433 |
req->ptr2 = SvPVbyte_nolen (req->fh); |
| 1434 |
req->sv1 = data; |
| 1435 |
req->ptr1 = SvPVbyte_nolen (data); |
| 1436 |
|
| 1437 |
REQ_SEND; |
| 1438 |
} |
| 1439 |
|
| 1440 |
void |
| 1441 |
aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef) |
| 1442 |
SV * out_fh |
| 1443 |
SV * in_fh |
| 1444 |
UV in_offset |
| 1445 |
UV length |
| 1446 |
SV * callback |
| 1447 |
PROTOTYPE: $$$$;$ |
| 1448 |
PPCODE: |
| 1449 |
{ |
| 1450 |
dREQ; |
| 1451 |
|
| 1452 |
req->type = REQ_SENDFILE; |
| 1453 |
req->fh = newSVsv (out_fh); |
| 1454 |
req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh))); |
| 1455 |
req->sv2 = newSVsv (in_fh); |
| 1456 |
req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh))); |
| 1457 |
req->offs = in_offset; |
| 1458 |
req->size = length; |
| 1459 |
|
| 1460 |
REQ_SEND; |
| 1461 |
} |
| 1462 |
|
| 1463 |
void |
| 1464 |
aio_readahead (fh,offset,length,callback=&PL_sv_undef) |
| 1465 |
SV * fh |
| 1466 |
UV offset |
| 1467 |
IV length |
| 1468 |
SV * callback |
| 1469 |
PROTOTYPE: $$$;$ |
| 1470 |
PPCODE: |
| 1471 |
{ |
| 1472 |
dREQ; |
| 1473 |
|
| 1474 |
req->type = REQ_READAHEAD; |
| 1475 |
req->fh = newSVsv (fh); |
| 1476 |
req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh))); |
| 1477 |
req->offs = offset; |
| 1478 |
req->size = length; |
| 1479 |
|
| 1480 |
REQ_SEND; |
| 1481 |
} |
| 1482 |
|
| 1483 |
void |
| 1484 |
aio_stat (fh_or_path,callback=&PL_sv_undef) |
| 1485 |
SV8 * fh_or_path |
| 1486 |
SV * callback |
| 1487 |
ALIAS: |
| 1488 |
aio_stat = REQ_STAT |
| 1489 |
aio_lstat = REQ_LSTAT |
| 1490 |
PPCODE: |
| 1491 |
{ |
| 1492 |
dREQ; |
| 1493 |
|
| 1494 |
req->ptr2 = malloc (sizeof (Stat_t)); |
| 1495 |
if (!req->ptr2) |
| 1496 |
{ |
| 1497 |
req_free (req); |
| 1498 |
croak ("out of memory during aio_stat statdata allocation"); |
| 1499 |
} |
| 1500 |
|
| 1501 |
req->flags |= FLAG_PTR2_FREE; |
| 1502 |
|
| 1503 |
if (SvPOK (fh_or_path)) |
| 1504 |
{ |
| 1505 |
req->type = ix; |
| 1506 |
req->sv1 = newSVsv (fh_or_path); |
| 1507 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
| 1508 |
} |
| 1509 |
else |
| 1510 |
{ |
| 1511 |
req->type = REQ_FSTAT; |
| 1512 |
req->fh = newSVsv (fh_or_path); |
| 1513 |
req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
| 1514 |
} |
| 1515 |
|
| 1516 |
REQ_SEND; |
| 1517 |
} |
| 1518 |
|
| 1519 |
void |
| 1520 |
aio_unlink (pathname,callback=&PL_sv_undef) |
| 1521 |
SV8 * pathname |
| 1522 |
SV * callback |
| 1523 |
ALIAS: |
| 1524 |
aio_unlink = REQ_UNLINK |
| 1525 |
aio_rmdir = REQ_RMDIR |
| 1526 |
aio_readdir = REQ_READDIR |
| 1527 |
PPCODE: |
| 1528 |
{ |
| 1529 |
dREQ; |
| 1530 |
|
| 1531 |
req->type = ix; |
| 1532 |
req->sv1 = newSVsv (pathname); |
| 1533 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
| 1534 |
|
| 1535 |
REQ_SEND; |
| 1536 |
} |
| 1537 |
|
| 1538 |
void |
| 1539 |
aio_link (oldpath,newpath,callback=&PL_sv_undef) |
| 1540 |
SV8 * oldpath |
| 1541 |
SV8 * newpath |
| 1542 |
SV * callback |
| 1543 |
ALIAS: |
| 1544 |
aio_link = REQ_LINK |
| 1545 |
aio_symlink = REQ_SYMLINK |
| 1546 |
aio_rename = REQ_RENAME |
| 1547 |
PPCODE: |
| 1548 |
{ |
| 1549 |
dREQ; |
| 1550 |
|
| 1551 |
req->type = ix; |
| 1552 |
req->fh = newSVsv (oldpath); |
| 1553 |
req->ptr2 = SvPVbyte_nolen (req->fh); |
| 1554 |
req->sv1 = newSVsv (newpath); |
| 1555 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
| 1556 |
|
| 1557 |
REQ_SEND; |
| 1558 |
} |
| 1559 |
|
| 1560 |
void |
| 1561 |
aio_mknod (pathname,mode,dev,callback=&PL_sv_undef) |
| 1562 |
SV8 * pathname |
| 1563 |
SV * callback |
| 1564 |
UV mode |
| 1565 |
UV dev |
| 1566 |
PPCODE: |
| 1567 |
{ |
| 1568 |
dREQ; |
| 1569 |
|
| 1570 |
req->type = REQ_MKNOD; |
| 1571 |
req->sv1 = newSVsv (pathname); |
| 1572 |
req->ptr1 = SvPVbyte_nolen (req->sv1); |
| 1573 |
req->mode = (mode_t)mode; |
| 1574 |
req->offs = dev; |
| 1575 |
|
| 1576 |
REQ_SEND; |
| 1577 |
} |
| 1578 |
|
| 1579 |
void |
| 1580 |
aio_busy (delay,callback=&PL_sv_undef) |
| 1581 |
double delay |
| 1582 |
SV * callback |
| 1583 |
PPCODE: |
| 1584 |
{ |
| 1585 |
dREQ; |
| 1586 |
|
| 1587 |
req->type = REQ_BUSY; |
| 1588 |
req->int1 = delay < 0. ? 0 : delay; |
| 1589 |
req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1); |
| 1590 |
|
| 1591 |
REQ_SEND; |
| 1592 |
} |
| 1593 |
|
| 1594 |
void |
| 1595 |
aio_group (callback=&PL_sv_undef) |
| 1596 |
SV * callback |
| 1597 |
PROTOTYPE: ;$ |
| 1598 |
PPCODE: |
| 1599 |
{ |
| 1600 |
dREQ; |
| 1601 |
|
| 1602 |
req->type = REQ_GROUP; |
| 1603 |
|
| 1604 |
req_send (req); |
| 1605 |
XPUSHs (req_sv (req, AIO_GRP_KLASS)); |
| 1606 |
} |
| 1607 |
|
| 1608 |
void |
| 1609 |
aio_nop (callback=&PL_sv_undef) |
| 1610 |
SV * callback |
| 1611 |
PPCODE: |
| 1612 |
{ |
| 1613 |
dREQ; |
| 1614 |
|
| 1615 |
req->type = REQ_NOP; |
| 1616 |
|
| 1617 |
REQ_SEND; |
| 1618 |
} |
| 1619 |
|
| 1620 |
int |
| 1621 |
aioreq_pri (int pri = 0) |
| 1622 |
PROTOTYPE: ;$ |
| 1623 |
CODE: |
| 1624 |
RETVAL = next_pri - PRI_BIAS; |
| 1625 |
if (items > 0) |
| 1626 |
{ |
| 1627 |
if (pri < PRI_MIN) pri = PRI_MIN; |
| 1628 |
if (pri > PRI_MAX) pri = PRI_MAX; |
| 1629 |
next_pri = pri + PRI_BIAS; |
| 1630 |
} |
| 1631 |
OUTPUT: |
| 1632 |
RETVAL |
| 1633 |
|
| 1634 |
void |
| 1635 |
aioreq_nice (int nice = 0) |
| 1636 |
CODE: |
| 1637 |
nice = next_pri - nice; |
| 1638 |
if (nice < PRI_MIN) nice = PRI_MIN; |
| 1639 |
if (nice > PRI_MAX) nice = PRI_MAX; |
| 1640 |
next_pri = nice + PRI_BIAS; |
| 1641 |
|
| 1642 |
void |
| 1643 |
flush () |
| 1644 |
PROTOTYPE: |
| 1645 |
CODE: |
| 1646 |
while (nreqs) |
| 1647 |
{ |
| 1648 |
poll_wait (); |
| 1649 |
poll_cb (); |
| 1650 |
} |
| 1651 |
|
| 1652 |
int |
| 1653 |
poll() |
| 1654 |
PROTOTYPE: |
| 1655 |
CODE: |
| 1656 |
if (nreqs) |
| 1657 |
{ |
| 1658 |
poll_wait (); |
| 1659 |
RETVAL = poll_cb (); |
| 1660 |
} |
| 1661 |
else |
| 1662 |
RETVAL = 0; |
| 1663 |
OUTPUT: |
| 1664 |
RETVAL |
| 1665 |
|
| 1666 |
int |
| 1667 |
poll_fileno() |
| 1668 |
PROTOTYPE: |
| 1669 |
CODE: |
| 1670 |
RETVAL = respipe [0]; |
| 1671 |
OUTPUT: |
| 1672 |
RETVAL |
| 1673 |
|
| 1674 |
int |
| 1675 |
poll_cb(...) |
| 1676 |
PROTOTYPE: |
| 1677 |
CODE: |
| 1678 |
RETVAL = poll_cb (); |
| 1679 |
OUTPUT: |
| 1680 |
RETVAL |
| 1681 |
|
| 1682 |
void |
| 1683 |
poll_wait() |
| 1684 |
PROTOTYPE: |
| 1685 |
CODE: |
| 1686 |
if (nreqs) |
| 1687 |
poll_wait (); |
| 1688 |
|
| 1689 |
int |
| 1690 |
nreqs() |
| 1691 |
PROTOTYPE: |
| 1692 |
CODE: |
| 1693 |
RETVAL = nreqs; |
| 1694 |
OUTPUT: |
| 1695 |
RETVAL |
| 1696 |
|
| 1697 |
int |
| 1698 |
nready() |
| 1699 |
PROTOTYPE: |
| 1700 |
CODE: |
| 1701 |
RETVAL = get_nready (); |
| 1702 |
OUTPUT: |
| 1703 |
RETVAL |
| 1704 |
|
| 1705 |
int |
| 1706 |
npending() |
| 1707 |
PROTOTYPE: |
| 1708 |
CODE: |
| 1709 |
RETVAL = get_npending (); |
| 1710 |
OUTPUT: |
| 1711 |
RETVAL |
| 1712 |
|
| 1713 |
int |
| 1714 |
nthreads() |
| 1715 |
PROTOTYPE: |
| 1716 |
CODE: |
| 1717 |
if (WORDACCESS_UNSAFE) LOCK (wrklock); |
| 1718 |
RETVAL = started; |
| 1719 |
if (WORDACCESS_UNSAFE) UNLOCK (wrklock); |
| 1720 |
OUTPUT: |
| 1721 |
RETVAL |
| 1722 |
|
| 1723 |
PROTOTYPES: DISABLE |
| 1724 |
|
| 1725 |
MODULE = IO::AIO PACKAGE = IO::AIO::REQ |
| 1726 |
|
| 1727 |
void |
| 1728 |
cancel (aio_req_ornot req) |
| 1729 |
CODE: |
| 1730 |
req_cancel (req); |
| 1731 |
|
| 1732 |
void |
| 1733 |
cb (aio_req_ornot req, SV *callback=&PL_sv_undef) |
| 1734 |
CODE: |
| 1735 |
SvREFCNT_dec (req->callback); |
| 1736 |
req->callback = newSVsv (callback); |
| 1737 |
|
| 1738 |
MODULE = IO::AIO PACKAGE = IO::AIO::GRP |
| 1739 |
|
| 1740 |
void |
| 1741 |
add (aio_req grp, ...) |
| 1742 |
PPCODE: |
| 1743 |
{ |
| 1744 |
int i; |
| 1745 |
aio_req req; |
| 1746 |
|
| 1747 |
if (grp->int1 == 2) |
| 1748 |
croak ("cannot add requests to IO::AIO::GRP after the group finished"); |
| 1749 |
|
| 1750 |
for (i = 1; i < items; ++i ) |
| 1751 |
{ |
| 1752 |
if (GIMME_V != G_VOID) |
| 1753 |
XPUSHs (sv_2mortal (newSVsv (ST (i)))); |
| 1754 |
|
| 1755 |
req = SvAIO_REQ (ST (i)); |
| 1756 |
|
| 1757 |
if (req) |
| 1758 |
{ |
| 1759 |
++grp->size; |
| 1760 |
req->grp = grp; |
| 1761 |
|
| 1762 |
req->grp_prev = 0; |
| 1763 |
req->grp_next = grp->grp_first; |
| 1764 |
|
| 1765 |
if (grp->grp_first) |
| 1766 |
grp->grp_first->grp_prev = req; |
| 1767 |
|
| 1768 |
grp->grp_first = req; |
| 1769 |
} |
| 1770 |
} |
| 1771 |
} |
| 1772 |
|
| 1773 |
void |
| 1774 |
cancel_subs (aio_req_ornot req) |
| 1775 |
CODE: |
| 1776 |
req_cancel_subs (req); |
| 1777 |
|
| 1778 |
void |
| 1779 |
result (aio_req grp, ...) |
| 1780 |
CODE: |
| 1781 |
{ |
| 1782 |
int i; |
| 1783 |
AV *av; |
| 1784 |
|
| 1785 |
grp->errorno = errno; |
| 1786 |
|
| 1787 |
av = newAV (); |
| 1788 |
|
| 1789 |
for (i = 1; i < items; ++i ) |
| 1790 |
av_push (av, newSVsv (ST (i))); |
| 1791 |
|
| 1792 |
SvREFCNT_dec (grp->sv1); |
| 1793 |
grp->sv1 = (SV *)av; |
| 1794 |
} |
| 1795 |
|
| 1796 |
void |
| 1797 |
errno (aio_req grp, int errorno = errno) |
| 1798 |
CODE: |
| 1799 |
grp->errorno = errorno; |
| 1800 |
|
| 1801 |
void |
| 1802 |
limit (aio_req grp, int limit) |
| 1803 |
CODE: |
| 1804 |
grp->int2 = limit; |
| 1805 |
aio_grp_feed (grp); |
| 1806 |
|
| 1807 |
void |
| 1808 |
feed (aio_req grp, SV *callback=&PL_sv_undef) |
| 1809 |
CODE: |
| 1810 |
{ |
| 1811 |
SvREFCNT_dec (grp->sv2); |
| 1812 |
grp->sv2 = newSVsv (callback); |
| 1813 |
|
| 1814 |
if (grp->int2 <= 0) |
| 1815 |
grp->int2 = 2; |
| 1816 |
|
| 1817 |
aio_grp_feed (grp); |
| 1818 |
} |
| 1819 |
|
