1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692
|
/*
* util/winsock_event.c - implementation of the unbound winsock event handler.
*
* Copyright (c) 2008, NLnet Labs. All rights reserved.
*
* This software is open source.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the NLNET LABS nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \file
* Implementation of the unbound WinSock2 API event notification handler
* for the Windows port.
*/
#include "config.h"
#ifdef USE_WINSOCK
#include <signal.h>
#include "util/winsock_event.h"
#include "util/fptr_wlist.h"
int mini_ev_cmp(const void* a, const void* b)
{
const struct event *e = (const struct event*)a;
const struct event *f = (const struct event*)b;
if(e->ev_timeout.tv_sec < f->ev_timeout.tv_sec)
return -1;
if(e->ev_timeout.tv_sec > f->ev_timeout.tv_sec)
return 1;
if(e->ev_timeout.tv_usec < f->ev_timeout.tv_usec)
return -1;
if(e->ev_timeout.tv_usec > f->ev_timeout.tv_usec)
return 1;
if(e < f)
return -1;
if(e > f)
return 1;
return 0;
}
/** set time */
static int
settime(struct event_base* base)
{
if(gettimeofday(base->time_tv, NULL) < 0) {
return -1;
}
#ifndef S_SPLINT_S
*base->time_secs = (uint32_t)base->time_tv->tv_sec;
#endif
return 0;
}
#ifdef UNBOUND_DEBUG
/**
* Find a fd in the list of items.
* Note that not all items have a fd associated (those are -1).
* Signals are stored separately, and not searched.
* @param base: event base to look in.
* @param fd: what socket to look for.
* @return the index in the array, or -1 on failure.
*/
static int
find_fd(struct event_base* base, int fd)
{
int i;
for(i=0; i<base->max; i++) {
if(base->items[i]->ev_fd == fd)
return i;
}
return -1;
}
#endif
/** Find ptr in base array */
static void
zero_waitfor(WSAEVENT waitfor[], WSAEVENT x)
{
int i;
for(i=0; i<WSK_MAX_ITEMS; i++) {
if(waitfor[i] == x)
waitfor[i] = 0;
}
}
void *event_init(uint32_t* time_secs, struct timeval* time_tv)
{
struct event_base* base = (struct event_base*)malloc(
sizeof(struct event_base));
if(!base)
return NULL;
memset(base, 0, sizeof(*base));
base->time_secs = time_secs;
base->time_tv = time_tv;
if(settime(base) < 0) {
event_base_free(base);
return NULL;
}
base->items = (struct event**)calloc(WSK_MAX_ITEMS,
sizeof(struct event*));
if(!base->items) {
event_base_free(base);
return NULL;
}
base->cap = WSK_MAX_ITEMS;
base->max = 0;
base->times = rbtree_create(mini_ev_cmp);
if(!base->times) {
event_base_free(base);
return NULL;
}
base->signals = (struct event**)calloc(MAX_SIG, sizeof(struct event*));
if(!base->signals) {
event_base_free(base);
return NULL;
}
base->tcp_stickies = 0;
base->tcp_reinvigorated = 0;
verbose(VERB_CLIENT, "winsock_event inited");
return base;
}
const char *event_get_version(void)
{
return "winsock-event-"PACKAGE_VERSION;
}
const char *event_get_method(void)
{
return "WSAWaitForMultipleEvents";
}
/** call timeouts handlers, and return how long to wait for next one or -1 */
static void handle_timeouts(struct event_base* base, struct timeval* now,
struct timeval* wait)
{
struct event* p;
#ifndef S_SPLINT_S
wait->tv_sec = (time_t)-1;
#endif
verbose(VERB_CLIENT, "winsock_event handle_timeouts");
while((rbnode_t*)(p = (struct event*)rbtree_first(base->times))
!=RBTREE_NULL) {
#ifndef S_SPLINT_S
if(p->ev_timeout.tv_sec > now->tv_sec ||
(p->ev_timeout.tv_sec==now->tv_sec &&
p->ev_timeout.tv_usec > now->tv_usec)) {
/* there is a next larger timeout. wait for it */
wait->tv_sec = p->ev_timeout.tv_sec - now->tv_sec;
if(now->tv_usec > p->ev_timeout.tv_usec) {
wait->tv_sec--;
wait->tv_usec = 1000000 - (now->tv_usec -
p->ev_timeout.tv_usec);
} else {
wait->tv_usec = p->ev_timeout.tv_usec
- now->tv_usec;
}
verbose(VERB_CLIENT, "winsock_event wait=%d.%6.6d",
(int)wait->tv_sec, (int)wait->tv_usec);
return;
}
#endif
/* event times out, remove it */
(void)rbtree_delete(base->times, p);
p->ev_events &= ~EV_TIMEOUT;
fptr_ok(fptr_whitelist_event(p->ev_callback));
(*p->ev_callback)(p->ev_fd, EV_TIMEOUT, p->ev_arg);
}
verbose(VERB_CLIENT, "winsock_event wait=(-1)");
}
/** handle is_signal events and see if signalled */
static void handle_signal(struct event* ev)
{
DWORD ret;
log_assert(ev->is_signal && ev->hEvent);
/* see if the event is signalled */
ret = WSAWaitForMultipleEvents(1, &ev->hEvent, 0 /* any object */,
0 /* return immediately */, 0 /* not alertable for IOcomple*/);
if(ret == WSA_WAIT_IO_COMPLETION || ret == WSA_WAIT_FAILED) {
log_err("WSAWaitForMultipleEvents(signal) failed: %s",
wsa_strerror(WSAGetLastError()));
return;
}
if(ret == WSA_WAIT_TIMEOUT) {
/* not signalled */
return;
}
/* reset the signal */
if(!WSAResetEvent(ev->hEvent))
log_err("WSAResetEvent failed: %s",
wsa_strerror(WSAGetLastError()));
/* do the callback (which may set the signal again) */
fptr_ok(fptr_whitelist_event(ev->ev_callback));
(*ev->ev_callback)(ev->ev_fd, ev->ev_events, ev->ev_arg);
}
/** call select and callbacks for that */
static int handle_select(struct event_base* base, struct timeval* wait)
{
DWORD timeout = 0; /* in milliseconds */
DWORD ret;
struct event* eventlist[WSK_MAX_ITEMS];
WSANETWORKEVENTS netev;
int i, numwait = 0, startidx = 0, was_timeout = 0;
int newstickies = 0;
struct timeval nultm;
verbose(VERB_CLIENT, "winsock_event handle_select");
#ifndef S_SPLINT_S
if(wait->tv_sec==(time_t)-1)
wait = NULL;
if(wait)
timeout = wait->tv_sec*1000 + wait->tv_usec/1000;
if(base->tcp_stickies) {
wait = &nultm;
nultm.tv_sec = 0;
nultm.tv_usec = 0;
timeout = 0; /* no waiting, we have sticky events */
}
#endif
/* prepare event array */
for(i=0; i<base->max; i++) {
if(base->items[i]->ev_fd == -1 && !base->items[i]->is_signal)
continue; /* skip timer only events */
eventlist[numwait] = base->items[i];
base->waitfor[numwait++] = base->items[i]->hEvent;
if(numwait == WSK_MAX_ITEMS)
break; /* sanity check */
}
log_assert(numwait <= WSA_MAXIMUM_WAIT_EVENTS);
verbose(VERB_CLIENT, "winsock_event bmax=%d numwait=%d wait=%x "
"timeout=%d", base->max, numwait, (int)wait, (int)timeout);
/* do the wait */
if(numwait == 0) {
/* WSAWaitFor.. doesn't like 0 event objects */
if(wait) {
Sleep(timeout);
}
was_timeout = 1;
} else {
ret = WSAWaitForMultipleEvents(numwait, base->waitfor,
0 /* do not wait for all, just one will do */,
wait?timeout:WSA_INFINITE,
0); /* we are not alertable (IO completion events) */
if(ret == WSA_WAIT_IO_COMPLETION) {
log_err("WSAWaitForMultipleEvents failed: WSA_WAIT_IO_COMPLETION");
return -1;
} else if(ret == WSA_WAIT_FAILED) {
log_err("WSAWaitForMultipleEvents failed: %s",
wsa_strerror(WSAGetLastError()));
return -1;
} else if(ret == WSA_WAIT_TIMEOUT) {
was_timeout = 1;
} else
startidx = ret - WSA_WAIT_EVENT_0;
}
verbose(VERB_CLIENT, "winsock_event wake was_timeout=%d startidx=%d",
was_timeout, startidx);
/* get new time after wait */
if(settime(base) < 0)
return -1;
/* callbacks */
if(base->tcp_stickies)
startidx = 0; /* process all events, some are sticky */
for(i=startidx; i<numwait; i++)
eventlist[i]->just_checked = 1;
verbose(VERB_CLIENT, "winsock_event signals");
for(i=startidx; i<numwait; i++) {
if(!base->waitfor[i])
continue; /* was deleted */
if(eventlist[i]->is_signal) {
eventlist[i]->just_checked = 0;
handle_signal(eventlist[i]);
}
}
/* early exit - do not process network, exit quickly */
if(base->need_to_exit)
return 0;
verbose(VERB_CLIENT, "winsock_event net");
for(i=startidx; i<numwait; i++) {
short bits = 0;
/* eventlist[i] fired */
/* see if eventlist[i] is still valid and just checked from
* WSAWaitForEvents */
if(!base->waitfor[i])
continue; /* was deleted */
if(!eventlist[i]->just_checked)
continue; /* added by other callback */
if(eventlist[i]->is_signal)
continue; /* not a network event at all */
eventlist[i]->just_checked = 0;
if(WSAEnumNetworkEvents(eventlist[i]->ev_fd,
base->waitfor[i], /* reset the event handle */
/*NULL,*/ /* do not reset the event handle */
&netev) != 0) {
log_err("WSAEnumNetworkEvents failed: %s",
wsa_strerror(WSAGetLastError()));
return -1;
}
if((netev.lNetworkEvents & FD_READ)) {
if(netev.iErrorCode[FD_READ_BIT] != 0)
verbose(VERB_ALGO, "FD_READ_BIT error: %s",
wsa_strerror(netev.iErrorCode[FD_READ_BIT]));
bits |= EV_READ;
}
if((netev.lNetworkEvents & FD_WRITE)) {
if(netev.iErrorCode[FD_WRITE_BIT] != 0)
verbose(VERB_ALGO, "FD_WRITE_BIT error: %s",
wsa_strerror(netev.iErrorCode[FD_WRITE_BIT]));
bits |= EV_WRITE;
}
if((netev.lNetworkEvents & FD_CONNECT)) {
if(netev.iErrorCode[FD_CONNECT_BIT] != 0)
verbose(VERB_ALGO, "FD_CONNECT_BIT error: %s",
wsa_strerror(netev.iErrorCode[FD_CONNECT_BIT]));
bits |= EV_READ;
bits |= EV_WRITE;
}
if((netev.lNetworkEvents & FD_ACCEPT)) {
if(netev.iErrorCode[FD_ACCEPT_BIT] != 0)
verbose(VERB_ALGO, "FD_ACCEPT_BIT error: %s",
wsa_strerror(netev.iErrorCode[FD_ACCEPT_BIT]));
bits |= EV_READ;
}
if((netev.lNetworkEvents & FD_CLOSE)) {
if(netev.iErrorCode[FD_CLOSE_BIT] != 0)
verbose(VERB_ALGO, "FD_CLOSE_BIT error: %s",
wsa_strerror(netev.iErrorCode[FD_CLOSE_BIT]));
bits |= EV_READ;
bits |= EV_WRITE;
}
if(eventlist[i]->is_tcp && eventlist[i]->stick_events) {
verbose(VERB_ALGO, "winsock %d pass sticky %s%s",
eventlist[i]->ev_fd,
(eventlist[i]->old_events&EV_READ)?"EV_READ":"",
(eventlist[i]->old_events&EV_WRITE)?"EV_WRITE":"");
bits |= eventlist[i]->old_events;
}
if(eventlist[i]->is_tcp && bits) {
eventlist[i]->old_events = bits;
eventlist[i]->stick_events = 1;
if((eventlist[i]->ev_events & bits)) {
newstickies = 1;
}
verbose(VERB_ALGO, "winsock %d store sticky %s%s",
eventlist[i]->ev_fd,
(eventlist[i]->old_events&EV_READ)?"EV_READ":"",
(eventlist[i]->old_events&EV_WRITE)?"EV_WRITE":"");
}
if((bits & eventlist[i]->ev_events)) {
verbose(VERB_ALGO, "winsock event callback %p fd=%d "
"%s%s%s%s%s ; %s%s%s",
eventlist[i], eventlist[i]->ev_fd,
(netev.lNetworkEvents&FD_READ)?" FD_READ":"",
(netev.lNetworkEvents&FD_WRITE)?" FD_WRITE":"",
(netev.lNetworkEvents&FD_CONNECT)?
" FD_CONNECT":"",
(netev.lNetworkEvents&FD_ACCEPT)?
" FD_ACCEPT":"",
(netev.lNetworkEvents&FD_CLOSE)?" FD_CLOSE":"",
(bits&EV_READ)?" EV_READ":"",
(bits&EV_WRITE)?" EV_WRITE":"",
(bits&EV_TIMEOUT)?" EV_TIMEOUT":"");
fptr_ok(fptr_whitelist_event(
eventlist[i]->ev_callback));
(*eventlist[i]->ev_callback)(eventlist[i]->ev_fd,
bits & eventlist[i]->ev_events,
eventlist[i]->ev_arg);
}
if(eventlist[i]->is_tcp && bits)
verbose(VERB_ALGO, "winsock %d got sticky %s%s",
eventlist[i]->ev_fd,
(eventlist[i]->old_events&EV_READ)?"EV_READ":"",
(eventlist[i]->old_events&EV_WRITE)?"EV_WRITE":"");
}
verbose(VERB_CLIENT, "winsock_event net");
if(base->tcp_reinvigorated) {
verbose(VERB_CLIENT, "winsock_event reinvigorated");
base->tcp_reinvigorated = 0;
newstickies = 1;
}
base->tcp_stickies = newstickies;
verbose(VERB_CLIENT, "winsock_event handle_select end");
return 0;
}
int event_base_dispatch(struct event_base *base)
{
struct timeval wait;
if(settime(base) < 0)
return -1;
while(!base->need_to_exit)
{
/* see if timeouts need handling */
handle_timeouts(base, base->time_tv, &wait);
if(base->need_to_exit)
return 0;
/* do select */
if(handle_select(base, &wait) < 0) {
if(base->need_to_exit)
return 0;
return -1;
}
}
return 0;
}
int event_base_loopexit(struct event_base *base,
struct timeval * ATTR_UNUSED(tv))
{
verbose(VERB_CLIENT, "winsock_event loopexit");
base->need_to_exit = 1;
return 0;
}
void event_base_free(struct event_base *base)
{
verbose(VERB_CLIENT, "winsock_event event_base_free");
if(!base)
return;
if(base->items)
free(base->items);
if(base->times)
free(base->times);
if(base->signals)
free(base->signals);
free(base);
}
void event_set(struct event *ev, int fd, short bits,
void (*cb)(int, short, void *), void *arg)
{
ev->node.key = ev;
ev->ev_fd = fd;
ev->ev_events = bits;
ev->ev_callback = cb;
fptr_ok(fptr_whitelist_event(ev->ev_callback));
ev->ev_arg = arg;
ev->just_checked = 0;
ev->added = 0;
}
int event_base_set(struct event_base *base, struct event *ev)
{
ev->ev_base = base;
ev->old_events = 0;
ev->stick_events = 0;
ev->added = 0;
return 0;
}
int event_add(struct event *ev, struct timeval *tv)
{
verbose(VERB_ALGO, "event_add %p added=%d fd=%d tv=%d %s%s%s",
ev, ev->added, ev->ev_fd,
(tv?(int)tv->tv_sec*1000+(int)tv->tv_usec/1000:-1),
(ev->ev_events&EV_READ)?" EV_READ":"",
(ev->ev_events&EV_WRITE)?" EV_WRITE":"",
(ev->ev_events&EV_TIMEOUT)?" EV_TIMEOUT":"");
if(ev->added)
event_del(ev);
log_assert(ev->ev_fd==-1 || find_fd(ev->ev_base, ev->ev_fd) == -1);
ev->is_tcp = 0;
ev->is_signal = 0;
ev->just_checked = 0;
if((ev->ev_events&(EV_READ|EV_WRITE)) && ev->ev_fd != -1) {
BOOL b=0;
int t, l;
long events = 0;
if(ev->ev_base->max == ev->ev_base->cap)
return -1;
ev->idx = ev->ev_base->max++;
ev->ev_base->items[ev->idx] = ev;
if( (ev->ev_events&EV_READ) )
events |= FD_READ;
if( (ev->ev_events&EV_WRITE) )
events |= FD_WRITE;
l = sizeof(t);
if(getsockopt(ev->ev_fd, SOL_SOCKET, SO_TYPE,
(void*)&t, &l) != 0)
log_err("getsockopt(SO_TYPE) failed: %s",
wsa_strerror(WSAGetLastError()));
if(t == SOCK_STREAM) {
/* TCP socket */
ev->is_tcp = 1;
events |= FD_CLOSE;
if( (ev->ev_events&EV_WRITE) )
events |= FD_CONNECT;
l = sizeof(b);
if(getsockopt(ev->ev_fd, SOL_SOCKET, SO_ACCEPTCONN,
(void*)&b, &l) != 0)
log_err("getsockopt(SO_ACCEPTCONN) failed: %s",
wsa_strerror(WSAGetLastError()));
if(b) /* TCP accept socket */
events |= FD_ACCEPT;
}
ev->hEvent = WSACreateEvent();
if(ev->hEvent == WSA_INVALID_EVENT)
log_err("WSACreateEvent failed: %s",
wsa_strerror(WSAGetLastError()));
/* automatically sets fd to nonblocking mode.
* nonblocking cannot be disabled, until wsaES(fd, NULL, 0) */
if(WSAEventSelect(ev->ev_fd, ev->hEvent, events) != 0) {
log_err("WSAEventSelect failed: %s",
wsa_strerror(WSAGetLastError()));
}
if(ev->is_tcp && ev->stick_events &&
(ev->ev_events & ev->old_events)) {
/* go to processing the sticky event right away */
ev->ev_base->tcp_reinvigorated = 1;
}
}
if(tv && (ev->ev_events&EV_TIMEOUT)) {
#ifndef S_SPLINT_S
struct timeval *now = ev->ev_base->time_tv;
ev->ev_timeout.tv_sec = tv->tv_sec + now->tv_sec;
ev->ev_timeout.tv_usec = tv->tv_usec + now->tv_usec;
while(ev->ev_timeout.tv_usec > 1000000) {
ev->ev_timeout.tv_usec -= 1000000;
ev->ev_timeout.tv_sec++;
}
#endif
(void)rbtree_insert(ev->ev_base->times, &ev->node);
}
ev->added = 1;
return 0;
}
int event_del(struct event *ev)
{
verbose(VERB_ALGO, "event_del %p added=%d fd=%d tv=%d %s%s%s",
ev, ev->added, ev->ev_fd,
(ev->ev_events&EV_TIMEOUT)?(int)ev->ev_timeout.tv_sec*1000+
(int)ev->ev_timeout.tv_usec/1000:-1,
(ev->ev_events&EV_READ)?" EV_READ":"",
(ev->ev_events&EV_WRITE)?" EV_WRITE":"",
(ev->ev_events&EV_TIMEOUT)?" EV_TIMEOUT":"");
if(!ev->added)
return 0;
log_assert(ev->added);
if((ev->ev_events&EV_TIMEOUT))
(void)rbtree_delete(ev->ev_base->times, &ev->node);
if((ev->ev_events&(EV_READ|EV_WRITE)) && ev->ev_fd != -1) {
log_assert(ev->ev_base->max > 0);
/* remove item and compact the list */
ev->ev_base->items[ev->idx] =
ev->ev_base->items[ev->ev_base->max-1];
ev->ev_base->items[ev->ev_base->max-1] = NULL;
ev->ev_base->max--;
if(ev->idx < ev->ev_base->max)
ev->ev_base->items[ev->idx]->idx = ev->idx;
zero_waitfor(ev->ev_base->waitfor, ev->hEvent);
if(WSAEventSelect(ev->ev_fd, ev->hEvent, 0) != 0)
log_err("WSAEventSelect(disable) failed: %s",
wsa_strerror(WSAGetLastError()));
if(!WSACloseEvent(ev->hEvent))
log_err("WSACloseEvent failed: %s",
wsa_strerror(WSAGetLastError()));
}
ev->just_checked = 0;
ev->added = 0;
return 0;
}
/** which base gets to handle signals */
static struct event_base* signal_base = NULL;
/** signal handler */
static RETSIGTYPE sigh(int sig)
{
struct event* ev;
if(!signal_base || sig < 0 || sig >= MAX_SIG)
return;
ev = signal_base->signals[sig];
if(!ev)
return;
fptr_ok(fptr_whitelist_event(ev->ev_callback));
(*ev->ev_callback)(sig, EV_SIGNAL, ev->ev_arg);
}
int signal_add(struct event *ev, struct timeval * ATTR_UNUSED(tv))
{
if(ev->ev_fd == -1 || ev->ev_fd >= MAX_SIG)
return -1;
signal_base = ev->ev_base;
ev->ev_base->signals[ev->ev_fd] = ev;
ev->added = 1;
if(signal(ev->ev_fd, sigh) == SIG_ERR) {
return -1;
}
return 0;
}
int signal_del(struct event *ev)
{
if(ev->ev_fd == -1 || ev->ev_fd >= MAX_SIG)
return -1;
ev->ev_base->signals[ev->ev_fd] = NULL;
ev->added = 0;
return 0;
}
void winsock_tcp_wouldblock(struct event* ev, int eventbits)
{
verbose(VERB_ALGO, "winsock: tcp wouldblock %s",
eventbits==EV_READ?"EV_READ":"EV_WRITE");
ev->old_events &= (~eventbits);
if(ev->old_events == 0)
ev->stick_events = 0;
/* in case this is the last sticky event, we could
* possibly run an empty handler loop to reset the base
* tcp_stickies variable
*/
}
int winsock_register_wsaevent(struct event_base* base, struct event* ev,
WSAEVENT wsaevent, void (*cb)(int, short, void*), void* arg)
{
if(base->max == base->cap)
return 0;
memset(ev, 0, sizeof(*ev));
ev->ev_fd = -1;
ev->ev_events = EV_READ;
ev->ev_callback = cb;
ev->ev_arg = arg;
ev->is_signal = 1;
ev->hEvent = wsaevent;
ev->added = 1;
ev->ev_base = base;
ev->idx = ev->ev_base->max++;
ev->ev_base->items[ev->idx] = ev;
return 1;
}
void winsock_unregister_wsaevent(struct event* ev)
{
if(!ev || !ev->added) return;
log_assert(ev->added && ev->ev_base->max > 0)
/* remove item and compact the list */
ev->ev_base->items[ev->idx] = ev->ev_base->items[ev->ev_base->max-1];
ev->ev_base->items[ev->ev_base->max-1] = NULL;
ev->ev_base->max--;
if(ev->idx < ev->ev_base->max)
ev->ev_base->items[ev->idx]->idx = ev->idx;
ev->added = 0;
}
#else /* USE_WINSOCK */
/** symbol so this codefile defines symbols. pleasing ranlib on OSX 10.5 */
int winsock_unused_symbol = 1;
#endif /* USE_WINSOCK */
|