1290001Sglebius/* 2290001Sglebius * Copyright 2007-2012 Niels Provos and Nick Mathewson 3290001Sglebius * Copyright 2000-2007 Niels Provos <provos@citi.umich.edu> 4290001Sglebius * Copyright 2003 Michael A. Davis <mike@datanerds.net> 5290001Sglebius * 6290001Sglebius * Redistribution and use in source and binary forms, with or without 7290001Sglebius * modification, are permitted provided that the following conditions 8290001Sglebius * are met: 9290001Sglebius * 1. Redistributions of source code must retain the above copyright 10290001Sglebius * notice, this list of conditions and the following disclaimer. 11290001Sglebius * 2. Redistributions in binary form must reproduce the above copyright 12290001Sglebius * notice, this list of conditions and the following disclaimer in the 13290001Sglebius * documentation and/or other materials provided with the distribution. 14290001Sglebius * 3. The name of the author may not be used to endorse or promote products 15290001Sglebius * derived from this software without specific prior written permission. 16290001Sglebius * 17290001Sglebius * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18290001Sglebius * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19290001Sglebius * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20290001Sglebius * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21290001Sglebius * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22290001Sglebius * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23290001Sglebius * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24290001Sglebius * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25290001Sglebius * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26290001Sglebius * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27290001Sglebius */ 28290001Sglebius#include "event2/event-config.h" 29290001Sglebius#include "evconfig-private.h" 30290001Sglebius 31290001Sglebius#ifdef _WIN32 32290001Sglebius 33290001Sglebius#include <winsock2.h> 34290001Sglebius#include <windows.h> 35290001Sglebius#include <sys/types.h> 36290001Sglebius#include <sys/queue.h> 37290001Sglebius#include <limits.h> 38290001Sglebius#include <signal.h> 39290001Sglebius#include <stdio.h> 40290001Sglebius#include <stdlib.h> 41290001Sglebius#include <string.h> 42290001Sglebius#include <errno.h> 43290001Sglebius 44290001Sglebius#include "event2/util.h" 45290001Sglebius#include "util-internal.h" 46290001Sglebius#include "log-internal.h" 47290001Sglebius#include "event2/event.h" 48290001Sglebius#include "event-internal.h" 49290001Sglebius#include "evmap-internal.h" 50290001Sglebius#include "event2/thread.h" 51290001Sglebius#include "evthread-internal.h" 52290001Sglebius#include "time-internal.h" 53290001Sglebius 54290001Sglebius#define XFREE(ptr) do { if (ptr) mm_free(ptr); } while (0) 55290001Sglebius 56290001Sglebiusextern struct event_list timequeue; 57290001Sglebiusextern struct event_list addqueue; 58290001Sglebius 59290001Sglebiusstruct win_fd_set { 60290001Sglebius u_int fd_count; 61290001Sglebius SOCKET fd_array[1]; 62290001Sglebius}; 63290001Sglebius 64290001Sglebius/* MSDN says this is required to handle SIGFPE */ 65290001Sglebiusvolatile double SIGFPE_REQ = 0.0f; 66290001Sglebius 67290001Sglebiusstruct idx_info { 68290001Sglebius int read_pos_plus1; 69290001Sglebius int write_pos_plus1; 70290001Sglebius}; 71290001Sglebius 72290001Sglebiusstruct win32op { 73290001Sglebius unsigned num_fds_in_fd_sets; 74290001Sglebius int resize_out_sets; 75290001Sglebius struct win_fd_set *readset_in; 76290001Sglebius struct win_fd_set *writeset_in; 77290001Sglebius struct win_fd_set *readset_out; 78290001Sglebius struct win_fd_set *writeset_out; 79290001Sglebius struct win_fd_set *exset_out; 80290001Sglebius unsigned signals_are_broken : 1; 81290001Sglebius}; 82290001Sglebius 83290001Sglebiusstatic void *win32_init(struct event_base *); 84290001Sglebiusstatic int win32_add(struct event_base *, evutil_socket_t, short old, short events, void *idx_); 85290001Sglebiusstatic int win32_del(struct event_base *, evutil_socket_t, short old, short events, void *idx_); 86290001Sglebiusstatic int win32_dispatch(struct event_base *base, struct timeval *); 87290001Sglebiusstatic void win32_dealloc(struct event_base *); 88290001Sglebius 89290001Sglebiusstruct eventop win32ops = { 90290001Sglebius "win32", 91290001Sglebius win32_init, 92290001Sglebius win32_add, 93290001Sglebius win32_del, 94290001Sglebius win32_dispatch, 95290001Sglebius win32_dealloc, 96290001Sglebius 0, /* doesn't need reinit */ 97290001Sglebius 0, /* No features supported. */ 98290001Sglebius sizeof(struct idx_info), 99290001Sglebius}; 100290001Sglebius 101290001Sglebius#define FD_SET_ALLOC_SIZE(n) ((sizeof(struct win_fd_set) + ((n)-1)*sizeof(SOCKET))) 102290001Sglebius 103290001Sglebiusstatic int 104290001Sglebiusgrow_fd_sets(struct win32op *op, unsigned new_num_fds) 105290001Sglebius{ 106290001Sglebius size_t size; 107290001Sglebius 108290001Sglebius EVUTIL_ASSERT(new_num_fds >= op->readset_in->fd_count && 109290001Sglebius new_num_fds >= op->writeset_in->fd_count); 110290001Sglebius EVUTIL_ASSERT(new_num_fds >= 1); 111290001Sglebius 112290001Sglebius size = FD_SET_ALLOC_SIZE(new_num_fds); 113290001Sglebius if (!(op->readset_in = mm_realloc(op->readset_in, size))) 114290001Sglebius return (-1); 115290001Sglebius if (!(op->writeset_in = mm_realloc(op->writeset_in, size))) 116290001Sglebius return (-1); 117290001Sglebius op->resize_out_sets = 1; 118290001Sglebius op->num_fds_in_fd_sets = new_num_fds; 119290001Sglebius return (0); 120290001Sglebius} 121290001Sglebius 122290001Sglebiusstatic int 123290001Sglebiusdo_fd_set(struct win32op *op, struct idx_info *ent, evutil_socket_t s, int read) 124290001Sglebius{ 125290001Sglebius struct win_fd_set *set = read ? op->readset_in : op->writeset_in; 126290001Sglebius if (read) { 127290001Sglebius if (ent->read_pos_plus1 > 0) 128290001Sglebius return (0); 129290001Sglebius } else { 130290001Sglebius if (ent->write_pos_plus1 > 0) 131290001Sglebius return (0); 132290001Sglebius } 133290001Sglebius if (set->fd_count == op->num_fds_in_fd_sets) { 134290001Sglebius if (grow_fd_sets(op, op->num_fds_in_fd_sets*2)) 135290001Sglebius return (-1); 136290001Sglebius /* set pointer will have changed and needs reiniting! */ 137290001Sglebius set = read ? op->readset_in : op->writeset_in; 138290001Sglebius } 139290001Sglebius set->fd_array[set->fd_count] = s; 140290001Sglebius if (read) 141290001Sglebius ent->read_pos_plus1 = set->fd_count+1; 142290001Sglebius else 143290001Sglebius ent->write_pos_plus1 = set->fd_count+1; 144290001Sglebius return (set->fd_count++); 145290001Sglebius} 146290001Sglebius 147290001Sglebiusstatic int 148290001Sglebiusdo_fd_clear(struct event_base *base, 149290001Sglebius struct win32op *op, struct idx_info *ent, int read) 150290001Sglebius{ 151290001Sglebius int i; 152290001Sglebius struct win_fd_set *set = read ? op->readset_in : op->writeset_in; 153290001Sglebius if (read) { 154290001Sglebius i = ent->read_pos_plus1 - 1; 155290001Sglebius ent->read_pos_plus1 = 0; 156290001Sglebius } else { 157290001Sglebius i = ent->write_pos_plus1 - 1; 158290001Sglebius ent->write_pos_plus1 = 0; 159290001Sglebius } 160290001Sglebius if (i < 0) 161290001Sglebius return (0); 162290001Sglebius if (--set->fd_count != (unsigned)i) { 163290001Sglebius struct idx_info *ent2; 164290001Sglebius SOCKET s2; 165290001Sglebius s2 = set->fd_array[i] = set->fd_array[set->fd_count]; 166290001Sglebius 167290001Sglebius ent2 = evmap_io_get_fdinfo_(&base->io, s2); 168290001Sglebius 169290001Sglebius if (!ent2) /* This indicates a bug. */ 170290001Sglebius return (0); 171290001Sglebius if (read) 172290001Sglebius ent2->read_pos_plus1 = i+1; 173290001Sglebius else 174290001Sglebius ent2->write_pos_plus1 = i+1; 175290001Sglebius } 176290001Sglebius return (0); 177290001Sglebius} 178290001Sglebius 179290001Sglebius#define NEVENT 32 180290001Sglebiusvoid * 181290001Sglebiuswin32_init(struct event_base *base) 182290001Sglebius{ 183290001Sglebius struct win32op *winop; 184290001Sglebius size_t size; 185290001Sglebius if (!(winop = mm_calloc(1, sizeof(struct win32op)))) 186290001Sglebius return NULL; 187290001Sglebius winop->num_fds_in_fd_sets = NEVENT; 188290001Sglebius size = FD_SET_ALLOC_SIZE(NEVENT); 189290001Sglebius if (!(winop->readset_in = mm_malloc(size))) 190290001Sglebius goto err; 191290001Sglebius if (!(winop->writeset_in = mm_malloc(size))) 192290001Sglebius goto err; 193290001Sglebius if (!(winop->readset_out = mm_malloc(size))) 194290001Sglebius goto err; 195290001Sglebius if (!(winop->writeset_out = mm_malloc(size))) 196290001Sglebius goto err; 197290001Sglebius if (!(winop->exset_out = mm_malloc(size))) 198290001Sglebius goto err; 199290001Sglebius winop->readset_in->fd_count = winop->writeset_in->fd_count = 0; 200290001Sglebius winop->readset_out->fd_count = winop->writeset_out->fd_count 201290001Sglebius = winop->exset_out->fd_count = 0; 202290001Sglebius 203290001Sglebius if (evsig_init_(base) < 0) 204290001Sglebius winop->signals_are_broken = 1; 205290001Sglebius 206290001Sglebius evutil_weakrand_seed_(&base->weakrand_seed, 0); 207290001Sglebius 208290001Sglebius return (winop); 209290001Sglebius err: 210290001Sglebius XFREE(winop->readset_in); 211290001Sglebius XFREE(winop->writeset_in); 212290001Sglebius XFREE(winop->readset_out); 213290001Sglebius XFREE(winop->writeset_out); 214290001Sglebius XFREE(winop->exset_out); 215290001Sglebius XFREE(winop); 216290001Sglebius return (NULL); 217290001Sglebius} 218290001Sglebius 219290001Sglebiusint 220290001Sglebiuswin32_add(struct event_base *base, evutil_socket_t fd, 221290001Sglebius short old, short events, void *idx_) 222290001Sglebius{ 223290001Sglebius struct win32op *win32op = base->evbase; 224290001Sglebius struct idx_info *idx = idx_; 225290001Sglebius 226290001Sglebius if ((events & EV_SIGNAL) && win32op->signals_are_broken) 227290001Sglebius return (-1); 228290001Sglebius 229290001Sglebius if (!(events & (EV_READ|EV_WRITE))) 230290001Sglebius return (0); 231290001Sglebius 232290001Sglebius event_debug(("%s: adding event for %d", __func__, (int)fd)); 233290001Sglebius if (events & EV_READ) { 234290001Sglebius if (do_fd_set(win32op, idx, fd, 1)<0) 235290001Sglebius return (-1); 236290001Sglebius } 237290001Sglebius if (events & EV_WRITE) { 238290001Sglebius if (do_fd_set(win32op, idx, fd, 0)<0) 239290001Sglebius return (-1); 240290001Sglebius } 241290001Sglebius return (0); 242290001Sglebius} 243290001Sglebius 244290001Sglebiusint 245290001Sglebiuswin32_del(struct event_base *base, evutil_socket_t fd, short old, short events, 246290001Sglebius void *idx_) 247290001Sglebius{ 248290001Sglebius struct win32op *win32op = base->evbase; 249290001Sglebius struct idx_info *idx = idx_; 250290001Sglebius 251290001Sglebius event_debug(("%s: Removing event for "EV_SOCK_FMT, 252290001Sglebius __func__, EV_SOCK_ARG(fd))); 253290001Sglebius if (events & EV_READ) 254290001Sglebius do_fd_clear(base, win32op, idx, 1); 255290001Sglebius if (events & EV_WRITE) 256290001Sglebius do_fd_clear(base, win32op, idx, 0); 257290001Sglebius 258290001Sglebius return 0; 259290001Sglebius} 260290001Sglebius 261290001Sglebiusstatic void 262290001Sglebiusfd_set_copy(struct win_fd_set *out, const struct win_fd_set *in) 263290001Sglebius{ 264290001Sglebius out->fd_count = in->fd_count; 265290001Sglebius memcpy(out->fd_array, in->fd_array, in->fd_count * (sizeof(SOCKET))); 266290001Sglebius} 267290001Sglebius 268290001Sglebius/* 269290001Sglebius static void dump_fd_set(struct win_fd_set *s) 270290001Sglebius { 271290001Sglebius unsigned int i; 272290001Sglebius printf("[ "); 273290001Sglebius for(i=0;i<s->fd_count;++i) 274290001Sglebius printf("%d ",(int)s->fd_array[i]); 275290001Sglebius printf("]\n"); 276290001Sglebius } 277290001Sglebius*/ 278290001Sglebius 279290001Sglebiusint 280290001Sglebiuswin32_dispatch(struct event_base *base, struct timeval *tv) 281290001Sglebius{ 282290001Sglebius struct win32op *win32op = base->evbase; 283290001Sglebius int res = 0; 284290001Sglebius unsigned j, i; 285290001Sglebius int fd_count; 286290001Sglebius SOCKET s; 287290001Sglebius 288290001Sglebius if (win32op->resize_out_sets) { 289290001Sglebius size_t size = FD_SET_ALLOC_SIZE(win32op->num_fds_in_fd_sets); 290290001Sglebius if (!(win32op->readset_out = mm_realloc(win32op->readset_out, size))) 291290001Sglebius return (-1); 292290001Sglebius if (!(win32op->exset_out = mm_realloc(win32op->exset_out, size))) 293290001Sglebius return (-1); 294290001Sglebius if (!(win32op->writeset_out = mm_realloc(win32op->writeset_out, size))) 295290001Sglebius return (-1); 296290001Sglebius win32op->resize_out_sets = 0; 297290001Sglebius } 298290001Sglebius 299290001Sglebius fd_set_copy(win32op->readset_out, win32op->readset_in); 300290001Sglebius fd_set_copy(win32op->exset_out, win32op->writeset_in); 301290001Sglebius fd_set_copy(win32op->writeset_out, win32op->writeset_in); 302290001Sglebius 303290001Sglebius fd_count = 304290001Sglebius (win32op->readset_out->fd_count > win32op->writeset_out->fd_count) ? 305290001Sglebius win32op->readset_out->fd_count : win32op->writeset_out->fd_count; 306290001Sglebius 307290001Sglebius if (!fd_count) { 308290001Sglebius long msec = tv ? evutil_tv_to_msec_(tv) : LONG_MAX; 309290001Sglebius /* Sleep's DWORD argument is unsigned long */ 310290001Sglebius if (msec < 0) 311290001Sglebius msec = LONG_MAX; 312290001Sglebius /* Windows doesn't like you to call select() with no sockets */ 313290001Sglebius Sleep(msec); 314290001Sglebius return (0); 315290001Sglebius } 316290001Sglebius 317290001Sglebius EVBASE_RELEASE_LOCK(base, th_base_lock); 318290001Sglebius 319290001Sglebius res = select(fd_count, 320290001Sglebius (struct fd_set*)win32op->readset_out, 321290001Sglebius (struct fd_set*)win32op->writeset_out, 322290001Sglebius (struct fd_set*)win32op->exset_out, tv); 323290001Sglebius 324290001Sglebius EVBASE_ACQUIRE_LOCK(base, th_base_lock); 325290001Sglebius 326290001Sglebius event_debug(("%s: select returned %d", __func__, res)); 327290001Sglebius 328290001Sglebius if (res <= 0) { 329290001Sglebius return res; 330290001Sglebius } 331290001Sglebius 332290001Sglebius if (win32op->readset_out->fd_count) { 333290001Sglebius i = evutil_weakrand_range_(&base->weakrand_seed, 334290001Sglebius win32op->readset_out->fd_count); 335290001Sglebius for (j=0; j<win32op->readset_out->fd_count; ++j) { 336290001Sglebius if (++i >= win32op->readset_out->fd_count) 337290001Sglebius i = 0; 338290001Sglebius s = win32op->readset_out->fd_array[i]; 339290001Sglebius evmap_io_active_(base, s, EV_READ); 340290001Sglebius } 341290001Sglebius } 342290001Sglebius if (win32op->exset_out->fd_count) { 343290001Sglebius i = evutil_weakrand_range_(&base->weakrand_seed, 344290001Sglebius win32op->exset_out->fd_count); 345290001Sglebius for (j=0; j<win32op->exset_out->fd_count; ++j) { 346290001Sglebius if (++i >= win32op->exset_out->fd_count) 347290001Sglebius i = 0; 348290001Sglebius s = win32op->exset_out->fd_array[i]; 349290001Sglebius evmap_io_active_(base, s, EV_WRITE); 350290001Sglebius } 351290001Sglebius } 352290001Sglebius if (win32op->writeset_out->fd_count) { 353290001Sglebius SOCKET s; 354290001Sglebius i = evutil_weakrand_range_(&base->weakrand_seed, 355290001Sglebius win32op->writeset_out->fd_count); 356290001Sglebius for (j=0; j<win32op->writeset_out->fd_count; ++j) { 357290001Sglebius if (++i >= win32op->writeset_out->fd_count) 358290001Sglebius i = 0; 359290001Sglebius s = win32op->writeset_out->fd_array[i]; 360290001Sglebius evmap_io_active_(base, s, EV_WRITE); 361290001Sglebius } 362290001Sglebius } 363290001Sglebius return (0); 364290001Sglebius} 365290001Sglebius 366290001Sglebiusvoid 367290001Sglebiuswin32_dealloc(struct event_base *base) 368290001Sglebius{ 369290001Sglebius struct win32op *win32op = base->evbase; 370290001Sglebius 371290001Sglebius evsig_dealloc_(base); 372290001Sglebius if (win32op->readset_in) 373290001Sglebius mm_free(win32op->readset_in); 374290001Sglebius if (win32op->writeset_in) 375290001Sglebius mm_free(win32op->writeset_in); 376290001Sglebius if (win32op->readset_out) 377290001Sglebius mm_free(win32op->readset_out); 378290001Sglebius if (win32op->writeset_out) 379290001Sglebius mm_free(win32op->writeset_out); 380290001Sglebius if (win32op->exset_out) 381290001Sglebius mm_free(win32op->exset_out); 382290001Sglebius /* XXXXX free the tree. */ 383290001Sglebius 384290001Sglebius memset(win32op, 0, sizeof(*win32op)); 385290001Sglebius mm_free(win32op); 386290001Sglebius} 387290001Sglebius 388290001Sglebius#endif 389