Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2007-2012 Niels Provos and Nick Mathewson |
| 3 | * Copyright 2000-2007 Niels Provos <provos@citi.umich.edu> |
| 4 | * Copyright 2003 Michael A. Davis <mike@datanerds.net> |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * 3. The name of the author may not be used to endorse or promote products |
| 15 | * derived from this software without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 28 | #include "event2/event-config.h" |
| 29 | #include "evconfig-private.h" |
| 30 | |
| 31 | #ifdef _WIN32 |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 32 | |
| 33 | #include <winsock2.h> |
| 34 | #include <windows.h> |
| 35 | #include <sys/types.h> |
| 36 | #include <sys/queue.h> |
| 37 | #include <limits.h> |
| 38 | #include <signal.h> |
| 39 | #include <stdio.h> |
| 40 | #include <stdlib.h> |
| 41 | #include <string.h> |
| 42 | #include <errno.h> |
| 43 | |
| 44 | #include "event2/util.h" |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 45 | #include "util-internal.h" |
| 46 | #include "log-internal.h" |
| 47 | #include "event2/event.h" |
| 48 | #include "event-internal.h" |
| 49 | #include "evmap-internal.h" |
| 50 | #include "event2/thread.h" |
| 51 | #include "evthread-internal.h" |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 52 | #include "time-internal.h" |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 53 | |
| 54 | #define XFREE(ptr) do { if (ptr) mm_free(ptr); } while (0) |
| 55 | |
| 56 | extern struct event_list timequeue; |
| 57 | extern struct event_list addqueue; |
| 58 | |
| 59 | struct win_fd_set { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 60 | unsigned int fd_count; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 61 | SOCKET fd_array[1]; |
| 62 | }; |
| 63 | |
| 64 | /* MSDN says this is required to handle SIGFPE */ |
| 65 | volatile double SIGFPE_REQ = 0.0f; |
| 66 | |
| 67 | struct idx_info { |
| 68 | int read_pos_plus1; |
| 69 | int write_pos_plus1; |
| 70 | }; |
| 71 | |
| 72 | struct win32op { |
| 73 | unsigned num_fds_in_fd_sets; |
| 74 | int resize_out_sets; |
| 75 | struct win_fd_set *readset_in; |
| 76 | struct win_fd_set *writeset_in; |
| 77 | struct win_fd_set *readset_out; |
| 78 | struct win_fd_set *writeset_out; |
| 79 | struct win_fd_set *exset_out; |
| 80 | unsigned signals_are_broken : 1; |
| 81 | }; |
| 82 | |
| 83 | static void *win32_init(struct event_base *); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 84 | static int win32_add(struct event_base *, evutil_socket_t, short old, short events, void *idx_); |
| 85 | static int win32_del(struct event_base *, evutil_socket_t, short old, short events, void *idx_); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 86 | static int win32_dispatch(struct event_base *base, struct timeval *); |
| 87 | static void win32_dealloc(struct event_base *); |
| 88 | |
| 89 | struct eventop win32ops = { |
| 90 | "win32", |
| 91 | win32_init, |
| 92 | win32_add, |
| 93 | win32_del, |
| 94 | win32_dispatch, |
| 95 | win32_dealloc, |
| 96 | 0, /* doesn't need reinit */ |
| 97 | 0, /* No features supported. */ |
| 98 | sizeof(struct idx_info), |
| 99 | }; |
| 100 | |
| 101 | #define FD_SET_ALLOC_SIZE(n) ((sizeof(struct win_fd_set) + ((n)-1)*sizeof(SOCKET))) |
| 102 | |
| 103 | static int |
| 104 | grow_fd_sets(struct win32op *op, unsigned new_num_fds) |
| 105 | { |
| 106 | size_t size; |
| 107 | |
| 108 | EVUTIL_ASSERT(new_num_fds >= op->readset_in->fd_count && |
| 109 | new_num_fds >= op->writeset_in->fd_count); |
| 110 | EVUTIL_ASSERT(new_num_fds >= 1); |
| 111 | |
| 112 | size = FD_SET_ALLOC_SIZE(new_num_fds); |
| 113 | if (!(op->readset_in = mm_realloc(op->readset_in, size))) |
| 114 | return (-1); |
| 115 | if (!(op->writeset_in = mm_realloc(op->writeset_in, size))) |
| 116 | return (-1); |
| 117 | op->resize_out_sets = 1; |
| 118 | op->num_fds_in_fd_sets = new_num_fds; |
| 119 | return (0); |
| 120 | } |
| 121 | |
| 122 | static int |
| 123 | do_fd_set(struct win32op *op, struct idx_info *ent, evutil_socket_t s, int read) |
| 124 | { |
| 125 | struct win_fd_set *set = read ? op->readset_in : op->writeset_in; |
| 126 | if (read) { |
| 127 | if (ent->read_pos_plus1 > 0) |
| 128 | return (0); |
| 129 | } else { |
| 130 | if (ent->write_pos_plus1 > 0) |
| 131 | return (0); |
| 132 | } |
| 133 | if (set->fd_count == op->num_fds_in_fd_sets) { |
| 134 | if (grow_fd_sets(op, op->num_fds_in_fd_sets*2)) |
| 135 | return (-1); |
| 136 | /* set pointer will have changed and needs reiniting! */ |
| 137 | set = read ? op->readset_in : op->writeset_in; |
| 138 | } |
| 139 | set->fd_array[set->fd_count] = s; |
| 140 | if (read) |
| 141 | ent->read_pos_plus1 = set->fd_count+1; |
| 142 | else |
| 143 | ent->write_pos_plus1 = set->fd_count+1; |
| 144 | return (set->fd_count++); |
| 145 | } |
| 146 | |
| 147 | static int |
| 148 | do_fd_clear(struct event_base *base, |
| 149 | struct win32op *op, struct idx_info *ent, int read) |
| 150 | { |
| 151 | int i; |
| 152 | struct win_fd_set *set = read ? op->readset_in : op->writeset_in; |
| 153 | if (read) { |
| 154 | i = ent->read_pos_plus1 - 1; |
| 155 | ent->read_pos_plus1 = 0; |
| 156 | } else { |
| 157 | i = ent->write_pos_plus1 - 1; |
| 158 | ent->write_pos_plus1 = 0; |
| 159 | } |
| 160 | if (i < 0) |
| 161 | return (0); |
| 162 | if (--set->fd_count != (unsigned)i) { |
| 163 | struct idx_info *ent2; |
| 164 | SOCKET s2; |
| 165 | s2 = set->fd_array[i] = set->fd_array[set->fd_count]; |
| 166 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 167 | ent2 = evmap_io_get_fdinfo_(&base->io, s2); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 168 | |
| 169 | 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 |
| 180 | void * |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 181 | win32_init(struct event_base *base) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 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 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 203 | if (evsig_init_(base) < 0) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 204 | winop->signals_are_broken = 1; |
| 205 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 206 | evutil_weakrand_seed_(&base->weakrand_seed, 0); |
| 207 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 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 | |
| 219 | int |
| 220 | win32_add(struct event_base *base, evutil_socket_t fd, |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 221 | short old, short events, void *idx_) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 222 | { |
| 223 | struct win32op *win32op = base->evbase; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 224 | struct idx_info *idx = idx_; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 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 | |
| 244 | int |
| 245 | win32_del(struct event_base *base, evutil_socket_t fd, short old, short events, |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 246 | void *idx_) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 247 | { |
| 248 | struct win32op *win32op = base->evbase; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 249 | struct idx_info *idx = idx_; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 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 | |
| 261 | static void |
| 262 | fd_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 | |
| 279 | int |
| 280 | win32_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) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 308 | long msec = tv ? evutil_tv_to_msec_(tv) : LONG_MAX; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 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) { |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 329 | event_debug(("%s: %s", __func__, |
| 330 | evutil_socket_error_to_string(EVUTIL_SOCKET_ERROR()))); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 331 | return res; |
| 332 | } |
| 333 | |
| 334 | if (win32op->readset_out->fd_count) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 335 | i = evutil_weakrand_range_(&base->weakrand_seed, |
| 336 | win32op->readset_out->fd_count); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 337 | for (j=0; j<win32op->readset_out->fd_count; ++j) { |
| 338 | if (++i >= win32op->readset_out->fd_count) |
| 339 | i = 0; |
| 340 | s = win32op->readset_out->fd_array[i]; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 341 | evmap_io_active_(base, s, EV_READ); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 342 | } |
| 343 | } |
| 344 | if (win32op->exset_out->fd_count) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 345 | i = evutil_weakrand_range_(&base->weakrand_seed, |
| 346 | win32op->exset_out->fd_count); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 347 | for (j=0; j<win32op->exset_out->fd_count; ++j) { |
| 348 | if (++i >= win32op->exset_out->fd_count) |
| 349 | i = 0; |
| 350 | s = win32op->exset_out->fd_array[i]; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 351 | evmap_io_active_(base, s, EV_WRITE); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 352 | } |
| 353 | } |
| 354 | if (win32op->writeset_out->fd_count) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 355 | i = evutil_weakrand_range_(&base->weakrand_seed, |
| 356 | win32op->writeset_out->fd_count); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 357 | for (j=0; j<win32op->writeset_out->fd_count; ++j) { |
| 358 | if (++i >= win32op->writeset_out->fd_count) |
| 359 | i = 0; |
| 360 | s = win32op->writeset_out->fd_array[i]; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 361 | evmap_io_active_(base, s, EV_WRITE); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 362 | } |
| 363 | } |
| 364 | return (0); |
| 365 | } |
| 366 | |
| 367 | void |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 368 | win32_dealloc(struct event_base *base) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 369 | { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 370 | struct win32op *win32op = base->evbase; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 371 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 372 | evsig_dealloc_(base); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 373 | if (win32op->readset_in) |
| 374 | mm_free(win32op->readset_in); |
| 375 | if (win32op->writeset_in) |
| 376 | mm_free(win32op->writeset_in); |
| 377 | if (win32op->readset_out) |
| 378 | mm_free(win32op->readset_out); |
| 379 | if (win32op->writeset_out) |
| 380 | mm_free(win32op->writeset_out); |
| 381 | if (win32op->exset_out) |
| 382 | mm_free(win32op->exset_out); |
| 383 | /* XXXXX free the tree. */ |
| 384 | |
| 385 | memset(win32op, 0, sizeof(*win32op)); |
| 386 | mm_free(win32op); |
| 387 | } |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 388 | |
| 389 | #endif |