197403Sobrien/* 2169691Skan * Copyright 2007-2012 Niels Provos and Nick Mathewson 3169691Skan * Copyright 2000-2007 Niels Provos <provos@citi.umich.edu> 497403Sobrien * Copyright 2003 Michael A. Davis <mike@datanerds.net> 597403Sobrien * 6132720Skan * Redistribution and use in source and binary forms, with or without 797403Sobrien * modification, are permitted provided that the following conditions 8132720Skan * are met: 997403Sobrien * 1. Redistributions of source code must retain the above copyright 1097403Sobrien * notice, this list of conditions and the following disclaimer. 1197403Sobrien * 2. Redistributions in binary form must reproduce the above copyright 1297403Sobrien * notice, this list of conditions and the following disclaimer in the 13132720Skan * documentation and/or other materials provided with the distribution. 1497403Sobrien * 3. The name of the author may not be used to endorse or promote products 1597403Sobrien * derived from this software without specific prior written permission. 1697403Sobrien * 1797403Sobrien * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1897403Sobrien * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19132720Skan * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20169691Skan * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21169691Skan * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2297403Sobrien * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2397403Sobrien * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2497403Sobrien * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2597403Sobrien * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2697403Sobrien * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2797403Sobrien */ 2897403Sobrien#include "event2/event-config.h" 2997403Sobrien#include "evconfig-private.h" 3097403Sobrien 3197403Sobrien#ifdef _WIN32 3297403Sobrien 33169691Skan#include <winsock2.h> 3497403Sobrien#include <windows.h> 3597403Sobrien#include <sys/types.h> 36132720Skan#include <sys/queue.h> 37132720Skan#include <limits.h> 3897403Sobrien#include <signal.h> 3997403Sobrien#include <stdio.h> 4097403Sobrien#include <stdlib.h> 41169691Skan#include <string.h> 42169691Skan#include <errno.h> 4397403Sobrien 4497403Sobrien#include "event2/util.h" 4597403Sobrien#include "util-internal.h" 4697403Sobrien#include "log-internal.h" 4797403Sobrien#include "event2/event.h" 4897403Sobrien#include "event-internal.h" 4997403Sobrien#include "evmap-internal.h" 50169691Skan#include "event2/thread.h" 51169691Skan#include "evthread-internal.h" 52169691Skan#include "time-internal.h" 53169691Skan 54169691Skan#define XFREE(ptr) do { if (ptr) mm_free(ptr); } while (0) 55169691Skan 56169691Skanextern struct event_list timequeue; 57169691Skanextern struct event_list addqueue; 5897403Sobrien 5997403Sobrienstruct win_fd_set { 6097403Sobrien u_int fd_count; 6197403Sobrien SOCKET fd_array[1]; 62117397Skan}; 63117397Skan 64117397Skan/* MSDN says this is required to handle SIGFPE */ 65117397Skanvolatile double SIGFPE_REQ = 0.0f; 6697403Sobrien 67117397Skanstruct idx_info { 6897403Sobrien int read_pos_plus1; 6997403Sobrien int write_pos_plus1; 7097403Sobrien}; 71171827Skan 7297403Sobrienstruct win32op { 7397403Sobrien unsigned num_fds_in_fd_sets; 7497403Sobrien int resize_out_sets; 7597403Sobrien struct win_fd_set *readset_in; 7697403Sobrien struct win_fd_set *writeset_in; 7797403Sobrien struct win_fd_set *readset_out; 7897403Sobrien struct win_fd_set *writeset_out; 7997403Sobrien struct win_fd_set *exset_out; 8097403Sobrien unsigned signals_are_broken : 1; 8197403Sobrien}; 8297403Sobrien 8397403Sobrienstatic void *win32_init(struct event_base *); 84171827Skanstatic int win32_add(struct event_base *, evutil_socket_t, short old, short events, void *idx_); 8597403Sobrienstatic int win32_del(struct event_base *, evutil_socket_t, short old, short events, void *idx_); 8697403Sobrienstatic int win32_dispatch(struct event_base *base, struct timeval *); 8797403Sobrienstatic void win32_dealloc(struct event_base *); 8897403Sobrien 8997403Sobrienstruct eventop win32ops = { 9097403Sobrien "win32", 9197403Sobrien win32_init, 9297403Sobrien win32_add, 9397403Sobrien win32_del, 9497403Sobrien win32_dispatch, 9597403Sobrien win32_dealloc, 96171827Skan 0, /* doesn't need reinit */ 9797403Sobrien 0, /* No features supported. */ 9897403Sobrien sizeof(struct idx_info), 9997403Sobrien}; 10097403Sobrien 10197403Sobrien#define FD_SET_ALLOC_SIZE(n) ((sizeof(struct win_fd_set) + ((n)-1)*sizeof(SOCKET))) 102228780Spfg 103233699Stheravenstatic int 104233699Stheravengrow_fd_sets(struct win32op *op, unsigned new_num_fds) 105233699Stheraven{ 106233699Stheraven size_t size; 107233699Stheraven 108233699Stheraven EVUTIL_ASSERT(new_num_fds >= op->readset_in->fd_count && 10997403Sobrien new_num_fds >= op->writeset_in->fd_count); 11097403Sobrien EVUTIL_ASSERT(new_num_fds >= 1); 11197403Sobrien 11297403Sobrien size = FD_SET_ALLOC_SIZE(new_num_fds); 11397403Sobrien if (!(op->readset_in = mm_realloc(op->readset_in, size))) 11497403Sobrien return (-1); 11597403Sobrien if (!(op->writeset_in = mm_realloc(op->writeset_in, size))) 11697403Sobrien return (-1); 11797403Sobrien op->resize_out_sets = 1; 118171827Skan op->num_fds_in_fd_sets = new_num_fds; 11997403Sobrien return (0); 12097403Sobrien} 121171827Skan 122171827Skanstatic int 123171827Skando_fd_set(struct win32op *op, struct idx_info *ent, evutil_socket_t s, int read) 124171827Skan{ 125171827Skan struct win_fd_set *set = read ? op->readset_in : op->writeset_in; 126171827Skan if (read) { 127171827Skan if (ent->read_pos_plus1 > 0) 128171827Skan return (0); 129171827Skan } else { 130171827Skan if (ent->write_pos_plus1 > 0) 13197403Sobrien return (0); 13297403Sobrien } 133117397Skan if (set->fd_count == op->num_fds_in_fd_sets) { 134117397Skan if (grow_fd_sets(op, op->num_fds_in_fd_sets*2)) 135117397Skan return (-1); 136117397Skan /* set pointer will have changed and needs reiniting! */ 13797403Sobrien set = read ? op->readset_in : op->writeset_in; 13897403Sobrien } 13997403Sobrien set->fd_array[set->fd_count] = s; 14097403Sobrien if (read) 14197403Sobrien ent->read_pos_plus1 = set->fd_count+1; 142171827Skan else 14397403Sobrien ent->write_pos_plus1 = set->fd_count+1; 14497403Sobrien return (set->fd_count++); 14597403Sobrien} 146171827Skan 147169691Skanstatic int 148169691Skando_fd_clear(struct event_base *base, 14997403Sobrien struct win32op *op, struct idx_info *ent, int read) 15097403Sobrien{ 15197403Sobrien int i; 15297403Sobrien struct win_fd_set *set = read ? op->readset_in : op->writeset_in; 15397403Sobrien if (read) { 15497403Sobrien i = ent->read_pos_plus1 - 1; 15597403Sobrien ent->read_pos_plus1 = 0; 156171827Skan } else { 15797403Sobrien i = ent->write_pos_plus1 - 1; 15897403Sobrien ent->write_pos_plus1 = 0; 15997403Sobrien } 160171827Skan if (i < 0) 161169691Skan return (0); 162169691Skan if (--set->fd_count != (unsigned)i) { 16397403Sobrien struct idx_info *ent2; 16497403Sobrien SOCKET s2; 16597403Sobrien s2 = set->fd_array[i] = set->fd_array[set->fd_count]; 166169691Skan 167169691Skan ent2 = evmap_io_get_fdinfo_(&base->io, s2); 16897403Sobrien 16997403Sobrien if (!ent2) /* This indicates a bug. */ 170 return (0); 171 if (read) 172 ent2->read_pos_plus1 = i+1; 173 else 174 ent2->write_pos_plus1 = i+1; 175 } 176 return (0); 177} 178 179#define NEVENT 32 180void * 181win32_init(struct event_base *base) 182{ 183 struct win32op *winop; 184 size_t size; 185 if (!(winop = mm_calloc(1, sizeof(struct win32op)))) 186 return NULL; 187 winop->num_fds_in_fd_sets = NEVENT; 188 size = FD_SET_ALLOC_SIZE(NEVENT); 189 if (!(winop->readset_in = mm_malloc(size))) 190 goto err; 191 if (!(winop->writeset_in = mm_malloc(size))) 192 goto err; 193 if (!(winop->readset_out = mm_malloc(size))) 194 goto err; 195 if (!(winop->writeset_out = mm_malloc(size))) 196 goto err; 197 if (!(winop->exset_out = mm_malloc(size))) 198 goto err; 199 winop->readset_in->fd_count = winop->writeset_in->fd_count = 0; 200 winop->readset_out->fd_count = winop->writeset_out->fd_count 201 = winop->exset_out->fd_count = 0; 202 203 if (evsig_init_(base) < 0) 204 winop->signals_are_broken = 1; 205 206 evutil_weakrand_seed_(&base->weakrand_seed, 0); 207 208 return (winop); 209 err: 210 XFREE(winop->readset_in); 211 XFREE(winop->writeset_in); 212 XFREE(winop->readset_out); 213 XFREE(winop->writeset_out); 214 XFREE(winop->exset_out); 215 XFREE(winop); 216 return (NULL); 217} 218 219int 220win32_add(struct event_base *base, evutil_socket_t fd, 221 short old, short events, void *idx_) 222{ 223 struct win32op *win32op = base->evbase; 224 struct idx_info *idx = idx_; 225 226 if ((events & EV_SIGNAL) && win32op->signals_are_broken) 227 return (-1); 228 229 if (!(events & (EV_READ|EV_WRITE))) 230 return (0); 231 232 event_debug(("%s: adding event for %d", __func__, (int)fd)); 233 if (events & EV_READ) { 234 if (do_fd_set(win32op, idx, fd, 1)<0) 235 return (-1); 236 } 237 if (events & EV_WRITE) { 238 if (do_fd_set(win32op, idx, fd, 0)<0) 239 return (-1); 240 } 241 return (0); 242} 243 244int 245win32_del(struct event_base *base, evutil_socket_t fd, short old, short events, 246 void *idx_) 247{ 248 struct win32op *win32op = base->evbase; 249 struct idx_info *idx = idx_; 250 251 event_debug(("%s: Removing event for "EV_SOCK_FMT, 252 __func__, EV_SOCK_ARG(fd))); 253 if (events & EV_READ) 254 do_fd_clear(base, win32op, idx, 1); 255 if (events & EV_WRITE) 256 do_fd_clear(base, win32op, idx, 0); 257 258 return 0; 259} 260 261static void 262fd_set_copy(struct win_fd_set *out, const struct win_fd_set *in) 263{ 264 out->fd_count = in->fd_count; 265 memcpy(out->fd_array, in->fd_array, in->fd_count * (sizeof(SOCKET))); 266} 267 268/* 269 static void dump_fd_set(struct win_fd_set *s) 270 { 271 unsigned int i; 272 printf("[ "); 273 for(i=0;i<s->fd_count;++i) 274 printf("%d ",(int)s->fd_array[i]); 275 printf("]\n"); 276 } 277*/ 278 279int 280win32_dispatch(struct event_base *base, struct timeval *tv) 281{ 282 struct win32op *win32op = base->evbase; 283 int res = 0; 284 unsigned j, i; 285 int fd_count; 286 SOCKET s; 287 288 if (win32op->resize_out_sets) { 289 size_t size = FD_SET_ALLOC_SIZE(win32op->num_fds_in_fd_sets); 290 if (!(win32op->readset_out = mm_realloc(win32op->readset_out, size))) 291 return (-1); 292 if (!(win32op->exset_out = mm_realloc(win32op->exset_out, size))) 293 return (-1); 294 if (!(win32op->writeset_out = mm_realloc(win32op->writeset_out, size))) 295 return (-1); 296 win32op->resize_out_sets = 0; 297 } 298 299 fd_set_copy(win32op->readset_out, win32op->readset_in); 300 fd_set_copy(win32op->exset_out, win32op->writeset_in); 301 fd_set_copy(win32op->writeset_out, win32op->writeset_in); 302 303 fd_count = 304 (win32op->readset_out->fd_count > win32op->writeset_out->fd_count) ? 305 win32op->readset_out->fd_count : win32op->writeset_out->fd_count; 306 307 if (!fd_count) { 308 long msec = tv ? evutil_tv_to_msec_(tv) : LONG_MAX; 309 /* Sleep's DWORD argument is unsigned long */ 310 if (msec < 0) 311 msec = LONG_MAX; 312 /* Windows doesn't like you to call select() with no sockets */ 313 Sleep(msec); 314 return (0); 315 } 316 317 EVBASE_RELEASE_LOCK(base, th_base_lock); 318 319 res = select(fd_count, 320 (struct fd_set*)win32op->readset_out, 321 (struct fd_set*)win32op->writeset_out, 322 (struct fd_set*)win32op->exset_out, tv); 323 324 EVBASE_ACQUIRE_LOCK(base, th_base_lock); 325 326 event_debug(("%s: select returned %d", __func__, res)); 327 328 if (res <= 0) { 329 return res; 330 } 331 332 if (win32op->readset_out->fd_count) { 333 i = evutil_weakrand_range_(&base->weakrand_seed, 334 win32op->readset_out->fd_count); 335 for (j=0; j<win32op->readset_out->fd_count; ++j) { 336 if (++i >= win32op->readset_out->fd_count) 337 i = 0; 338 s = win32op->readset_out->fd_array[i]; 339 evmap_io_active_(base, s, EV_READ); 340 } 341 } 342 if (win32op->exset_out->fd_count) { 343 i = evutil_weakrand_range_(&base->weakrand_seed, 344 win32op->exset_out->fd_count); 345 for (j=0; j<win32op->exset_out->fd_count; ++j) { 346 if (++i >= win32op->exset_out->fd_count) 347 i = 0; 348 s = win32op->exset_out->fd_array[i]; 349 evmap_io_active_(base, s, EV_WRITE); 350 } 351 } 352 if (win32op->writeset_out->fd_count) { 353 SOCKET s; 354 i = evutil_weakrand_range_(&base->weakrand_seed, 355 win32op->writeset_out->fd_count); 356 for (j=0; j<win32op->writeset_out->fd_count; ++j) { 357 if (++i >= win32op->writeset_out->fd_count) 358 i = 0; 359 s = win32op->writeset_out->fd_array[i]; 360 evmap_io_active_(base, s, EV_WRITE); 361 } 362 } 363 return (0); 364} 365 366void 367win32_dealloc(struct event_base *base) 368{ 369 struct win32op *win32op = base->evbase; 370 371 evsig_dealloc_(base); 372 if (win32op->readset_in) 373 mm_free(win32op->readset_in); 374 if (win32op->writeset_in) 375 mm_free(win32op->writeset_in); 376 if (win32op->readset_out) 377 mm_free(win32op->readset_out); 378 if (win32op->writeset_out) 379 mm_free(win32op->writeset_out); 380 if (win32op->exset_out) 381 mm_free(win32op->exset_out); 382 /* XXXXX free the tree. */ 383 384 memset(win32op, 0, sizeof(*win32op)); 385 mm_free(win32op); 386} 387 388#endif 389