The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 1 | /* http://frotznet.googlecode.com/svn/trunk/utils/fdevent.c |
| 2 | ** |
| 3 | ** Copyright 2006, Brian Swetland <swetland@frotz.net> |
| 4 | ** |
JP Abgrall | 0e7c427 | 2011-02-23 18:44:39 -0800 | [diff] [blame] | 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 8 | ** |
JP Abgrall | 0e7c427 | 2011-02-23 18:44:39 -0800 | [diff] [blame] | 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 10 | ** |
JP Abgrall | 0e7c427 | 2011-02-23 18:44:39 -0800 | [diff] [blame] | 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 18 | #include <sys/ioctl.h> |
| 19 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 20 | #include <stdlib.h> |
| 21 | #include <stdio.h> |
| 22 | #include <string.h> |
| 23 | #include <unistd.h> |
| 24 | #include <errno.h> |
| 25 | |
| 26 | #include <fcntl.h> |
| 27 | |
| 28 | #include <stdarg.h> |
| 29 | #include <stddef.h> |
| 30 | |
leozwang | d3fc15f | 2014-07-29 12:50:02 -0700 | [diff] [blame] | 31 | #include "adb_trace.h" |
David 'Digit' Turner | 414ff7d | 2009-05-18 17:07:46 +0200 | [diff] [blame] | 32 | #include "fdevent.h" |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 33 | #include "transport.h" |
| 34 | #include "sysdeps.h" |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 35 | |
leozwang | d3fc15f | 2014-07-29 12:50:02 -0700 | [diff] [blame] | 36 | #define TRACE_TAG TRACE_FDEVENT |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 37 | |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 38 | /* !!! Do not enable DEBUG for the adb that will run as the server: |
| 39 | ** both stdout and stderr are used to communicate between the client |
| 40 | ** and server. Any extra output will cause failures. |
| 41 | */ |
| 42 | #define DEBUG 0 /* non-0 will break adb server */ |
| 43 | |
| 44 | // This socket is used when a subproc shell service exists. |
| 45 | // It wakes up the fdevent_loop() and cause the correct handling |
| 46 | // of the shell's pseudo-tty master. I.e. force close it. |
| 47 | int SHELL_EXIT_NOTIFY_FD = -1; |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 48 | |
| 49 | static void fatal(const char *fn, const char *fmt, ...) |
| 50 | { |
| 51 | va_list ap; |
| 52 | va_start(ap, fmt); |
| 53 | fprintf(stderr, "%s:", fn); |
| 54 | vfprintf(stderr, fmt, ap); |
| 55 | va_end(ap); |
| 56 | abort(); |
| 57 | } |
| 58 | |
| 59 | #define FATAL(x...) fatal(__FUNCTION__, x) |
| 60 | |
| 61 | #if DEBUG |
| 62 | static void dump_fde(fdevent *fde, const char *info) |
| 63 | { |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 64 | adb_mutex_lock(&D_lock); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 65 | fprintf(stderr,"FDE #%03d %c%c%c %s\n", fde->fd, |
| 66 | fde->state & FDE_READ ? 'R' : ' ', |
| 67 | fde->state & FDE_WRITE ? 'W' : ' ', |
| 68 | fde->state & FDE_ERROR ? 'E' : ' ', |
| 69 | info); |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 70 | adb_mutex_unlock(&D_lock); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 71 | } |
| 72 | #else |
| 73 | #define dump_fde(fde, info) do { } while(0) |
| 74 | #endif |
| 75 | |
| 76 | #define FDE_EVENTMASK 0x00ff |
| 77 | #define FDE_STATEMASK 0xff00 |
| 78 | |
| 79 | #define FDE_ACTIVE 0x0100 |
| 80 | #define FDE_PENDING 0x0200 |
| 81 | #define FDE_CREATED 0x0400 |
| 82 | |
| 83 | static void fdevent_plist_enqueue(fdevent *node); |
| 84 | static void fdevent_plist_remove(fdevent *node); |
| 85 | static fdevent *fdevent_plist_dequeue(void); |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 86 | static void fdevent_subproc_event_func(int fd, unsigned events, void *userdata); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 87 | |
| 88 | static fdevent list_pending = { |
| 89 | .next = &list_pending, |
| 90 | .prev = &list_pending, |
| 91 | }; |
| 92 | |
| 93 | static fdevent **fd_table = 0; |
| 94 | static int fd_table_max = 0; |
| 95 | |
Dan Albert | 45741ae | 2014-09-25 15:10:34 -0700 | [diff] [blame] | 96 | #ifdef CRAPTASTIC |
| 97 | //HAVE_EPOLL |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 98 | |
| 99 | #include <sys/epoll.h> |
| 100 | |
| 101 | static int epoll_fd = -1; |
| 102 | |
| 103 | static void fdevent_init() |
| 104 | { |
Dan Albert | 45741ae | 2014-09-25 15:10:34 -0700 | [diff] [blame] | 105 | /* XXX: what's a good size for the passed in hint? */ |
| 106 | epoll_fd = epoll_create(256); |
| 107 | |
| 108 | if(epoll_fd < 0) { |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 109 | perror("epoll_create() failed"); |
| 110 | exit(1); |
| 111 | } |
Dan Albert | 45741ae | 2014-09-25 15:10:34 -0700 | [diff] [blame] | 112 | |
| 113 | /* mark for close-on-exec */ |
| 114 | fcntl(epoll_fd, F_SETFD, FD_CLOEXEC); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | static void fdevent_connect(fdevent *fde) |
| 118 | { |
Dan Albert | 45741ae | 2014-09-25 15:10:34 -0700 | [diff] [blame] | 119 | struct epoll_event ev; |
| 120 | |
| 121 | memset(&ev, 0, sizeof(ev)); |
| 122 | ev.events = 0; |
| 123 | ev.data.ptr = fde; |
| 124 | |
| 125 | #if 0 |
| 126 | if(epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fde->fd, &ev)) { |
| 127 | perror("epoll_ctl() failed\n"); |
| 128 | exit(1); |
| 129 | } |
| 130 | #endif |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 131 | } |
| 132 | |
| 133 | static void fdevent_disconnect(fdevent *fde) |
| 134 | { |
| 135 | struct epoll_event ev; |
David 'Digit' Turner | f6330a2 | 2009-05-18 17:36:28 +0200 | [diff] [blame] | 136 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 137 | memset(&ev, 0, sizeof(ev)); |
| 138 | ev.events = 0; |
| 139 | ev.data.ptr = fde; |
| 140 | |
| 141 | /* technically we only need to delete if we |
| 142 | ** were actively monitoring events, but let's |
| 143 | ** be aggressive and do it anyway, just in case |
| 144 | ** something's out of sync |
| 145 | */ |
| 146 | epoll_ctl(epoll_fd, EPOLL_CTL_DEL, fde->fd, &ev); |
| 147 | } |
| 148 | |
| 149 | static void fdevent_update(fdevent *fde, unsigned events) |
| 150 | { |
| 151 | struct epoll_event ev; |
| 152 | int active; |
David 'Digit' Turner | f6330a2 | 2009-05-18 17:36:28 +0200 | [diff] [blame] | 153 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 154 | active = (fde->state & FDE_EVENTMASK) != 0; |
David 'Digit' Turner | f6330a2 | 2009-05-18 17:36:28 +0200 | [diff] [blame] | 155 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 156 | memset(&ev, 0, sizeof(ev)); |
| 157 | ev.events = 0; |
| 158 | ev.data.ptr = fde; |
| 159 | |
| 160 | if(events & FDE_READ) ev.events |= EPOLLIN; |
| 161 | if(events & FDE_WRITE) ev.events |= EPOLLOUT; |
| 162 | if(events & FDE_ERROR) ev.events |= (EPOLLERR | EPOLLHUP); |
| 163 | |
| 164 | fde->state = (fde->state & FDE_STATEMASK) | events; |
| 165 | |
| 166 | if(active) { |
| 167 | /* we're already active. if we're changing to *no* |
| 168 | ** events being monitored, we need to delete, otherwise |
| 169 | ** we need to just modify |
| 170 | */ |
| 171 | if(ev.events) { |
| 172 | if(epoll_ctl(epoll_fd, EPOLL_CTL_MOD, fde->fd, &ev)) { |
| 173 | perror("epoll_ctl() failed\n"); |
| 174 | exit(1); |
| 175 | } |
| 176 | } else { |
| 177 | if(epoll_ctl(epoll_fd, EPOLL_CTL_DEL, fde->fd, &ev)) { |
| 178 | perror("epoll_ctl() failed\n"); |
| 179 | exit(1); |
| 180 | } |
| 181 | } |
| 182 | } else { |
| 183 | /* we're not active. if we're watching events, we need |
| 184 | ** to add, otherwise we can just do nothing |
| 185 | */ |
| 186 | if(ev.events) { |
| 187 | if(epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fde->fd, &ev)) { |
| 188 | perror("epoll_ctl() failed\n"); |
| 189 | exit(1); |
| 190 | } |
| 191 | } |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | static void fdevent_process() |
| 196 | { |
| 197 | struct epoll_event events[256]; |
| 198 | fdevent *fde; |
| 199 | int i, n; |
| 200 | |
| 201 | n = epoll_wait(epoll_fd, events, 256, -1); |
| 202 | |
| 203 | if(n < 0) { |
| 204 | if(errno == EINTR) return; |
| 205 | perror("epoll_wait"); |
| 206 | exit(1); |
| 207 | } |
| 208 | |
| 209 | for(i = 0; i < n; i++) { |
| 210 | struct epoll_event *ev = events + i; |
| 211 | fde = ev->data.ptr; |
| 212 | |
| 213 | if(ev->events & EPOLLIN) { |
| 214 | fde->events |= FDE_READ; |
| 215 | } |
| 216 | if(ev->events & EPOLLOUT) { |
| 217 | fde->events |= FDE_WRITE; |
| 218 | } |
| 219 | if(ev->events & (EPOLLERR | EPOLLHUP)) { |
| 220 | fde->events |= FDE_ERROR; |
| 221 | } |
| 222 | if(fde->events) { |
| 223 | if(fde->state & FDE_PENDING) continue; |
| 224 | fde->state |= FDE_PENDING; |
| 225 | fdevent_plist_enqueue(fde); |
| 226 | } |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | #else /* USE_SELECT */ |
| 231 | |
| 232 | #ifdef HAVE_WINSOCK |
| 233 | #include <winsock2.h> |
| 234 | #else |
| 235 | #include <sys/select.h> |
| 236 | #endif |
| 237 | |
| 238 | static fd_set read_fds; |
| 239 | static fd_set write_fds; |
| 240 | static fd_set error_fds; |
| 241 | |
| 242 | static int select_n = 0; |
| 243 | |
| 244 | static void fdevent_init(void) |
| 245 | { |
| 246 | FD_ZERO(&read_fds); |
| 247 | FD_ZERO(&write_fds); |
| 248 | FD_ZERO(&error_fds); |
| 249 | } |
| 250 | |
| 251 | static void fdevent_connect(fdevent *fde) |
| 252 | { |
| 253 | if(fde->fd >= select_n) { |
| 254 | select_n = fde->fd + 1; |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | static void fdevent_disconnect(fdevent *fde) |
| 259 | { |
| 260 | int i, n; |
David 'Digit' Turner | f6330a2 | 2009-05-18 17:36:28 +0200 | [diff] [blame] | 261 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 262 | FD_CLR(fde->fd, &read_fds); |
| 263 | FD_CLR(fde->fd, &write_fds); |
| 264 | FD_CLR(fde->fd, &error_fds); |
| 265 | |
| 266 | for(n = 0, i = 0; i < select_n; i++) { |
| 267 | if(fd_table[i] != 0) n = i; |
| 268 | } |
| 269 | select_n = n + 1; |
| 270 | } |
| 271 | |
| 272 | static void fdevent_update(fdevent *fde, unsigned events) |
| 273 | { |
| 274 | if(events & FDE_READ) { |
| 275 | FD_SET(fde->fd, &read_fds); |
| 276 | } else { |
| 277 | FD_CLR(fde->fd, &read_fds); |
| 278 | } |
| 279 | if(events & FDE_WRITE) { |
| 280 | FD_SET(fde->fd, &write_fds); |
| 281 | } else { |
| 282 | FD_CLR(fde->fd, &write_fds); |
| 283 | } |
| 284 | if(events & FDE_ERROR) { |
| 285 | FD_SET(fde->fd, &error_fds); |
| 286 | } else { |
| 287 | FD_CLR(fde->fd, &error_fds); |
| 288 | } |
| 289 | |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 290 | fde->state = (fde->state & FDE_STATEMASK) | events; |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 291 | } |
| 292 | |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 293 | /* Looks at fd_table[] for bad FDs and sets bit in fds. |
| 294 | ** Returns the number of bad FDs. |
| 295 | */ |
| 296 | static int fdevent_fd_check(fd_set *fds) |
| 297 | { |
| 298 | int i, n = 0; |
| 299 | fdevent *fde; |
| 300 | |
| 301 | for(i = 0; i < select_n; i++) { |
| 302 | fde = fd_table[i]; |
| 303 | if(fde == 0) continue; |
| 304 | if(fcntl(i, F_GETFL, NULL) < 0) { |
| 305 | FD_SET(i, fds); |
| 306 | n++; |
| 307 | // fde->state |= FDE_DONT_CLOSE; |
| 308 | |
| 309 | } |
| 310 | } |
| 311 | return n; |
| 312 | } |
| 313 | |
| 314 | #if !DEBUG |
| 315 | static inline void dump_all_fds(const char *extra_msg) {} |
| 316 | #else |
| 317 | static void dump_all_fds(const char *extra_msg) |
| 318 | { |
| 319 | int i; |
| 320 | fdevent *fde; |
| 321 | // per fd: 4 digits (but really: log10(FD_SETSIZE)), 1 staus, 1 blank |
| 322 | char msg_buff[FD_SETSIZE*6 + 1], *pb=msg_buff; |
| 323 | size_t max_chars = FD_SETSIZE * 6 + 1; |
| 324 | int printed_out; |
| 325 | #define SAFE_SPRINTF(...) \ |
| 326 | do { \ |
| 327 | printed_out = snprintf(pb, max_chars, __VA_ARGS__); \ |
| 328 | if (printed_out <= 0) { \ |
| 329 | D("... snprintf failed.\n"); \ |
| 330 | return; \ |
| 331 | } \ |
| 332 | if (max_chars < (unsigned int)printed_out) { \ |
| 333 | D("... snprintf out of space.\n"); \ |
| 334 | return; \ |
| 335 | } \ |
| 336 | pb += printed_out; \ |
| 337 | max_chars -= printed_out; \ |
| 338 | } while(0) |
| 339 | |
| 340 | for(i = 0; i < select_n; i++) { |
| 341 | fde = fd_table[i]; |
| 342 | SAFE_SPRINTF("%d", i); |
| 343 | if(fde == 0) { |
| 344 | SAFE_SPRINTF("? "); |
| 345 | continue; |
| 346 | } |
| 347 | if(fcntl(i, F_GETFL, NULL) < 0) { |
| 348 | SAFE_SPRINTF("b"); |
| 349 | } |
| 350 | SAFE_SPRINTF(" "); |
| 351 | } |
| 352 | D("%s fd_table[]->fd = {%s}\n", extra_msg, msg_buff); |
| 353 | } |
| 354 | #endif |
| 355 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 356 | static void fdevent_process() |
| 357 | { |
| 358 | int i, n; |
| 359 | fdevent *fde; |
| 360 | unsigned events; |
| 361 | fd_set rfd, wfd, efd; |
| 362 | |
| 363 | memcpy(&rfd, &read_fds, sizeof(fd_set)); |
| 364 | memcpy(&wfd, &write_fds, sizeof(fd_set)); |
| 365 | memcpy(&efd, &error_fds, sizeof(fd_set)); |
David 'Digit' Turner | f6330a2 | 2009-05-18 17:36:28 +0200 | [diff] [blame] | 366 | |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 367 | dump_all_fds("pre select()"); |
| 368 | |
| 369 | n = select(select_n, &rfd, &wfd, &efd, NULL); |
| 370 | int saved_errno = errno; |
| 371 | D("select() returned n=%d, errno=%d\n", n, n<0?saved_errno:0); |
| 372 | |
| 373 | dump_all_fds("post select()"); |
David 'Digit' Turner | f6330a2 | 2009-05-18 17:36:28 +0200 | [diff] [blame] | 374 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 375 | if(n < 0) { |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 376 | switch(saved_errno) { |
| 377 | case EINTR: return; |
| 378 | case EBADF: |
| 379 | // Can't trust the FD sets after an error. |
| 380 | FD_ZERO(&wfd); |
| 381 | FD_ZERO(&efd); |
| 382 | FD_ZERO(&rfd); |
| 383 | break; |
| 384 | default: |
| 385 | D("Unexpected select() error=%d\n", saved_errno); |
| 386 | return; |
| 387 | } |
| 388 | } |
| 389 | if(n <= 0) { |
| 390 | // We fake a read, as the rest of the code assumes |
| 391 | // that errors will be detected at that point. |
| 392 | n = fdevent_fd_check(&rfd); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 393 | } |
| 394 | |
| 395 | for(i = 0; (i < select_n) && (n > 0); i++) { |
| 396 | events = 0; |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 397 | if(FD_ISSET(i, &rfd)) { events |= FDE_READ; n--; } |
| 398 | if(FD_ISSET(i, &wfd)) { events |= FDE_WRITE; n--; } |
| 399 | if(FD_ISSET(i, &efd)) { events |= FDE_ERROR; n--; } |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 400 | |
| 401 | if(events) { |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 402 | fde = fd_table[i]; |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 403 | if(fde == 0) |
| 404 | FATAL("missing fde for fd %d\n", i); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 405 | |
| 406 | fde->events |= events; |
David 'Digit' Turner | f6330a2 | 2009-05-18 17:36:28 +0200 | [diff] [blame] | 407 | |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 408 | D("got events fde->fd=%d events=%04x, state=%04x\n", |
| 409 | fde->fd, fde->events, fde->state); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 410 | if(fde->state & FDE_PENDING) continue; |
| 411 | fde->state |= FDE_PENDING; |
| 412 | fdevent_plist_enqueue(fde); |
| 413 | } |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | #endif |
| 418 | |
| 419 | static void fdevent_register(fdevent *fde) |
| 420 | { |
| 421 | if(fde->fd < 0) { |
| 422 | FATAL("bogus negative fd (%d)\n", fde->fd); |
| 423 | } |
David 'Digit' Turner | f6330a2 | 2009-05-18 17:36:28 +0200 | [diff] [blame] | 424 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 425 | if(fde->fd >= fd_table_max) { |
| 426 | int oldmax = fd_table_max; |
| 427 | if(fde->fd > 32000) { |
| 428 | FATAL("bogus huuuuge fd (%d)\n", fde->fd); |
| 429 | } |
| 430 | if(fd_table_max == 0) { |
| 431 | fdevent_init(); |
| 432 | fd_table_max = 256; |
| 433 | } |
| 434 | while(fd_table_max <= fde->fd) { |
| 435 | fd_table_max *= 2; |
| 436 | } |
| 437 | fd_table = realloc(fd_table, sizeof(fdevent*) * fd_table_max); |
| 438 | if(fd_table == 0) { |
| 439 | FATAL("could not expand fd_table to %d entries\n", fd_table_max); |
| 440 | } |
| 441 | memset(fd_table + oldmax, 0, sizeof(int) * (fd_table_max - oldmax)); |
| 442 | } |
| 443 | |
| 444 | fd_table[fde->fd] = fde; |
| 445 | } |
| 446 | |
| 447 | static void fdevent_unregister(fdevent *fde) |
| 448 | { |
| 449 | if((fde->fd < 0) || (fde->fd >= fd_table_max)) { |
| 450 | FATAL("fd out of range (%d)\n", fde->fd); |
| 451 | } |
| 452 | |
| 453 | if(fd_table[fde->fd] != fde) { |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 454 | FATAL("fd_table out of sync [%d]\n", fde->fd); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 455 | } |
| 456 | |
| 457 | fd_table[fde->fd] = 0; |
| 458 | |
| 459 | if(!(fde->state & FDE_DONT_CLOSE)) { |
| 460 | dump_fde(fde, "close"); |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 461 | adb_close(fde->fd); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 462 | } |
| 463 | } |
| 464 | |
| 465 | static void fdevent_plist_enqueue(fdevent *node) |
| 466 | { |
| 467 | fdevent *list = &list_pending; |
| 468 | |
| 469 | node->next = list; |
| 470 | node->prev = list->prev; |
| 471 | node->prev->next = node; |
| 472 | list->prev = node; |
| 473 | } |
| 474 | |
| 475 | static void fdevent_plist_remove(fdevent *node) |
| 476 | { |
| 477 | node->prev->next = node->next; |
| 478 | node->next->prev = node->prev; |
| 479 | node->next = 0; |
| 480 | node->prev = 0; |
| 481 | } |
| 482 | |
| 483 | static fdevent *fdevent_plist_dequeue(void) |
| 484 | { |
| 485 | fdevent *list = &list_pending; |
| 486 | fdevent *node = list->next; |
David 'Digit' Turner | f6330a2 | 2009-05-18 17:36:28 +0200 | [diff] [blame] | 487 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 488 | if(node == list) return 0; |
David 'Digit' Turner | f6330a2 | 2009-05-18 17:36:28 +0200 | [diff] [blame] | 489 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 490 | list->next = node->next; |
| 491 | list->next->prev = list; |
| 492 | node->next = 0; |
| 493 | node->prev = 0; |
| 494 | |
| 495 | return node; |
| 496 | } |
| 497 | |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 498 | static void fdevent_call_fdfunc(fdevent* fde) |
| 499 | { |
| 500 | unsigned events = fde->events; |
| 501 | fde->events = 0; |
| 502 | if(!(fde->state & FDE_PENDING)) return; |
| 503 | fde->state &= (~FDE_PENDING); |
| 504 | dump_fde(fde, "callback"); |
| 505 | fde->func(fde->fd, events, fde->arg); |
| 506 | } |
| 507 | |
| 508 | static void fdevent_subproc_event_func(int fd, unsigned ev, void *userdata) |
| 509 | { |
| 510 | |
| 511 | D("subproc handling on fd=%d ev=%04x\n", fd, ev); |
| 512 | |
| 513 | // Hook oneself back into the fde's suitable for select() on read. |
| 514 | if((fd < 0) || (fd >= fd_table_max)) { |
| 515 | FATAL("fd %d out of range for fd_table \n", fd); |
| 516 | } |
| 517 | fdevent *fde = fd_table[fd]; |
| 518 | fdevent_add(fde, FDE_READ); |
| 519 | |
| 520 | if(ev & FDE_READ){ |
| 521 | int subproc_fd; |
| 522 | |
| 523 | if(readx(fd, &subproc_fd, sizeof(subproc_fd))) { |
| 524 | FATAL("Failed to read the subproc's fd from fd=%d\n", fd); |
| 525 | } |
| 526 | if((subproc_fd < 0) || (subproc_fd >= fd_table_max)) { |
| 527 | D("subproc_fd %d out of range 0, fd_table_max=%d\n", |
| 528 | subproc_fd, fd_table_max); |
| 529 | return; |
| 530 | } |
| 531 | fdevent *subproc_fde = fd_table[subproc_fd]; |
| 532 | if(!subproc_fde) { |
| 533 | D("subproc_fd %d cleared from fd_table\n", subproc_fd); |
| 534 | return; |
| 535 | } |
| 536 | if(subproc_fde->fd != subproc_fd) { |
| 537 | // Already reallocated? |
| 538 | D("subproc_fd %d != fd_table[].fd %d\n", subproc_fd, subproc_fde->fd); |
| 539 | return; |
| 540 | } |
| 541 | |
| 542 | subproc_fde->force_eof = 1; |
| 543 | |
| 544 | int rcount = 0; |
JP Abgrall | b40367e | 2011-03-29 12:36:22 -0700 | [diff] [blame] | 545 | ioctl(subproc_fd, FIONREAD, &rcount); |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 546 | D("subproc with fd=%d has rcount=%d err=%d\n", |
| 547 | subproc_fd, rcount, errno); |
| 548 | |
| 549 | if(rcount) { |
| 550 | // If there is data left, it will show up in the select(). |
| 551 | // This works because there is no other thread reading that |
| 552 | // data when in this fd_func(). |
| 553 | return; |
| 554 | } |
| 555 | |
| 556 | D("subproc_fde.state=%04x\n", subproc_fde->state); |
| 557 | subproc_fde->events |= FDE_READ; |
| 558 | if(subproc_fde->state & FDE_PENDING) { |
| 559 | return; |
| 560 | } |
| 561 | subproc_fde->state |= FDE_PENDING; |
| 562 | fdevent_call_fdfunc(subproc_fde); |
| 563 | } |
| 564 | } |
| 565 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 566 | fdevent *fdevent_create(int fd, fd_func func, void *arg) |
| 567 | { |
| 568 | fdevent *fde = (fdevent*) malloc(sizeof(fdevent)); |
| 569 | if(fde == 0) return 0; |
| 570 | fdevent_install(fde, fd, func, arg); |
| 571 | fde->state |= FDE_CREATED; |
| 572 | return fde; |
| 573 | } |
| 574 | |
| 575 | void fdevent_destroy(fdevent *fde) |
| 576 | { |
| 577 | if(fde == 0) return; |
| 578 | if(!(fde->state & FDE_CREATED)) { |
| 579 | FATAL("fde %p not created by fdevent_create()\n", fde); |
| 580 | } |
| 581 | fdevent_remove(fde); |
| 582 | } |
| 583 | |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 584 | void fdevent_install(fdevent *fde, int fd, fd_func func, void *arg) |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 585 | { |
| 586 | memset(fde, 0, sizeof(fdevent)); |
| 587 | fde->state = FDE_ACTIVE; |
| 588 | fde->fd = fd; |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 589 | fde->force_eof = 0; |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 590 | fde->func = func; |
| 591 | fde->arg = arg; |
| 592 | |
| 593 | #ifndef HAVE_WINSOCK |
| 594 | fcntl(fd, F_SETFL, O_NONBLOCK); |
| 595 | #endif |
| 596 | fdevent_register(fde); |
| 597 | dump_fde(fde, "connect"); |
| 598 | fdevent_connect(fde); |
| 599 | fde->state |= FDE_ACTIVE; |
| 600 | } |
| 601 | |
| 602 | void fdevent_remove(fdevent *fde) |
| 603 | { |
| 604 | if(fde->state & FDE_PENDING) { |
| 605 | fdevent_plist_remove(fde); |
| 606 | } |
| 607 | |
| 608 | if(fde->state & FDE_ACTIVE) { |
| 609 | fdevent_disconnect(fde); |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 610 | dump_fde(fde, "disconnect"); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 611 | fdevent_unregister(fde); |
| 612 | } |
| 613 | |
| 614 | fde->state = 0; |
| 615 | fde->events = 0; |
| 616 | } |
| 617 | |
| 618 | |
| 619 | void fdevent_set(fdevent *fde, unsigned events) |
| 620 | { |
| 621 | events &= FDE_EVENTMASK; |
David 'Digit' Turner | f6330a2 | 2009-05-18 17:36:28 +0200 | [diff] [blame] | 622 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 623 | if((fde->state & FDE_EVENTMASK) == events) return; |
David 'Digit' Turner | f6330a2 | 2009-05-18 17:36:28 +0200 | [diff] [blame] | 624 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 625 | if(fde->state & FDE_ACTIVE) { |
| 626 | fdevent_update(fde, events); |
| 627 | dump_fde(fde, "update"); |
| 628 | } |
| 629 | |
| 630 | fde->state = (fde->state & FDE_STATEMASK) | events; |
| 631 | |
| 632 | if(fde->state & FDE_PENDING) { |
| 633 | /* if we're pending, make sure |
| 634 | ** we don't signal an event that |
| 635 | ** is no longer wanted. |
| 636 | */ |
| 637 | fde->events &= (~events); |
| 638 | if(fde->events == 0) { |
| 639 | fdevent_plist_remove(fde); |
| 640 | fde->state &= (~FDE_PENDING); |
| 641 | } |
| 642 | } |
| 643 | } |
| 644 | |
| 645 | void fdevent_add(fdevent *fde, unsigned events) |
| 646 | { |
| 647 | fdevent_set( |
| 648 | fde, (fde->state & FDE_EVENTMASK) | (events & FDE_EVENTMASK)); |
| 649 | } |
| 650 | |
| 651 | void fdevent_del(fdevent *fde, unsigned events) |
| 652 | { |
| 653 | fdevent_set( |
| 654 | fde, (fde->state & FDE_EVENTMASK) & (~(events & FDE_EVENTMASK))); |
| 655 | } |
| 656 | |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 657 | void fdevent_subproc_setup() |
| 658 | { |
| 659 | int s[2]; |
| 660 | |
| 661 | if(adb_socketpair(s)) { |
| 662 | FATAL("cannot create shell-exit socket-pair\n"); |
| 663 | } |
| 664 | SHELL_EXIT_NOTIFY_FD = s[0]; |
| 665 | fdevent *fde; |
| 666 | fde = fdevent_create(s[1], fdevent_subproc_event_func, NULL); |
| 667 | if(!fde) |
| 668 | FATAL("cannot create fdevent for shell-exit handler\n"); |
| 669 | fdevent_add(fde, FDE_READ); |
| 670 | } |
| 671 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 672 | void fdevent_loop() |
| 673 | { |
| 674 | fdevent *fde; |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 675 | fdevent_subproc_setup(); |
David 'Digit' Turner | f6330a2 | 2009-05-18 17:36:28 +0200 | [diff] [blame] | 676 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 677 | for(;;) { |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 678 | D("--- ---- waiting for events\n"); |
| 679 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 680 | fdevent_process(); |
David 'Digit' Turner | f6330a2 | 2009-05-18 17:36:28 +0200 | [diff] [blame] | 681 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 682 | while((fde = fdevent_plist_dequeue())) { |
JP Abgrall | 408fa57 | 2011-03-16 15:57:42 -0700 | [diff] [blame] | 683 | fdevent_call_fdfunc(fde); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 684 | } |
| 685 | } |
| 686 | } |