| 1 | /*********************************************************** |
| 2 | |
| 3 | Copyright 1987, 1998 The Open Group |
| 4 | |
| 5 | Permission to use, copy, modify, distribute, and sell this software and its |
| 6 | documentation for any purpose is hereby granted without fee, provided that |
| 7 | the above copyright notice appear in all copies and that both that |
| 8 | copyright notice and this permission notice appear in supporting |
| 9 | documentation. |
| 10 | |
| 11 | The above copyright notice and this permission notice shall be included in |
| 12 | all copies or substantial portions of the Software. |
| 13 | |
| 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 17 | OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
| 18 | AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 19 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 20 | |
| 21 | Except as contained in this notice, the name of The Open Group shall not be |
| 22 | used in advertising or otherwise to promote the sale, use or other dealings |
| 23 | in this Software without prior written authorization from The Open Group. |
| 24 | |
| 25 | Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts. |
| 26 | |
| 27 | All Rights Reserved |
| 28 | |
| 29 | Permission to use, copy, modify, and distribute this software and its |
| 30 | documentation for any purpose and without fee is hereby granted, |
| 31 | provided that the above copyright notice appear in all copies and that |
| 32 | both that copyright notice and this permission notice appear in |
| 33 | supporting documentation, and that the name of Digital not be |
| 34 | used in advertising or publicity pertaining to distribution of the |
| 35 | software without specific, written prior permission. |
| 36 | |
| 37 | DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING |
| 38 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL |
| 39 | DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR |
| 40 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, |
| 41 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, |
| 42 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
| 43 | SOFTWARE. |
| 44 | |
| 45 | ******************************************************************/ |
| 46 | |
| 47 | /***************************************************************** |
| 48 | * OS Dependent input routines: |
| 49 | * |
| 50 | * WaitForSomething |
| 51 | * TimerForce, TimerSet, TimerCheck, TimerFree |
| 52 | * |
| 53 | *****************************************************************/ |
| 54 | |
| 55 | #ifdef HAVE_DIX_CONFIG_H |
| 56 | #include <dix-config.h> |
| 57 | #endif |
| 58 | |
| 59 | #ifdef WIN32 |
| 60 | #include <X11/Xwinsock.h> |
| 61 | #endif |
| 62 | #include <X11/Xos.h> /* for strings, fcntl, time */ |
| 63 | #include <errno.h> |
| 64 | #include <stdio.h> |
| 65 | #include <X11/X.h> |
| 66 | #include "misc.h" |
| 67 | |
| 68 | #include "osdep.h" |
| 69 | #include <X11/Xpoll.h> |
| 70 | #include "dixstruct.h" |
| 71 | #include "opaque.h" |
| 72 | #ifdef DPMSExtension |
| 73 | #include "dpmsproc.h" |
| 74 | #endif |
| 75 | #include "busfault.h" |
| 76 | |
| 77 | #ifdef WIN32 |
| 78 | /* Error codes from windows sockets differ from fileio error codes */ |
| 79 | #undef EINTR |
| 80 | #define EINTR WSAEINTR |
| 81 | #undef EINVAL |
| 82 | #define EINVAL WSAEINVAL |
| 83 | #undef EBADF |
| 84 | #define EBADF WSAENOTSOCK |
| 85 | /* Windows select does not set errno. Use GetErrno as wrapper for |
| 86 | WSAGetLastError */ |
| 87 | #define GetErrno WSAGetLastError |
| 88 | #else |
| 89 | /* This is just a fallback to errno to hide the differences between unix and |
| 90 | Windows in the code */ |
| 91 | #define GetErrno() errno |
| 92 | #endif |
| 93 | |
| 94 | /* like ffs, but uses fd_mask instead of int as argument, so it works |
| 95 | when fd_mask is longer than an int, such as common 64-bit platforms */ |
| 96 | /* modifications by raphael */ |
| 97 | int |
| 98 | mffs(fd_mask mask) |
| 99 | { |
| 100 | int i; |
| 101 | |
| 102 | if (!mask) |
| 103 | return 0; |
| 104 | i = 1; |
| 105 | while (!(mask & 1)) { |
| 106 | i++; |
| 107 | mask >>= 1; |
| 108 | } |
| 109 | return i; |
| 110 | } |
| 111 | |
| 112 | #ifdef DPMSExtension |
| 113 | #include <X11/extensions/dpmsconst.h> |
| 114 | #endif |
| 115 | |
| 116 | struct _OsTimerRec { |
| 117 | OsTimerPtr next; |
| 118 | CARD32 expires; |
| 119 | CARD32 delta; |
| 120 | OsTimerCallback callback; |
| 121 | pointer arg; |
| 122 | }; |
| 123 | |
| 124 | static void DoTimer(OsTimerPtr timer, CARD32 now, OsTimerPtr *prev); |
| 125 | static void CheckAllTimers(void); |
| 126 | static OsTimerPtr timers = NULL; |
| 127 | |
| 128 | /***************** |
| 129 | * WaitForSomething: |
| 130 | * Make the server suspend until there is |
| 131 | * 1. data from clients or |
| 132 | * 2. input events available or |
| 133 | * 3. ddx notices something of interest (graphics |
| 134 | * queue ready, etc.) or |
| 135 | * 4. clients that have buffered replies/events are ready |
| 136 | * |
| 137 | * If the time between INPUT events is |
| 138 | * greater than ScreenSaverTime, the display is turned off (or |
| 139 | * saved, depending on the hardware). So, WaitForSomething() |
| 140 | * has to handle this also (that's why the select() has a timeout. |
| 141 | * For more info on ClientsWithInput, see ReadRequestFromClient(). |
| 142 | * pClientsReady is an array to store ready client->index values into. |
| 143 | *****************/ |
| 144 | |
| 145 | int |
| 146 | WaitForSomething(int *pClientsReady) |
| 147 | { |
| 148 | int i; |
| 149 | struct timeval waittime, *wt; |
| 150 | INT32 timeout = 0; |
| 151 | fd_set clientsReadable; |
| 152 | fd_set clientsWritable; |
| 153 | int curclient; |
| 154 | int selecterr; |
| 155 | static int nready; |
| 156 | fd_set devicesReadable; |
| 157 | CARD32 now = 0; |
| 158 | Bool someReady = FALSE; |
| 159 | |
| 160 | FD_ZERO(&clientsReadable); |
| 161 | |
| 162 | if (nready) |
| 163 | SmartScheduleStopTimer(); |
| 164 | nready = 0; |
| 165 | |
| 166 | #ifdef BUSFAULT |
| 167 | busfault_check(); |
| 168 | #endif |
| 169 | |
| 170 | /* We need a while loop here to handle |
| 171 | crashed connections and the screen saver timeout */ |
| 172 | while (1) { |
| 173 | /* deal with any blocked jobs */ |
| 174 | if (workQueue) |
| 175 | ProcessWorkQueue(); |
| 176 | if (XFD_ANYSET(&ClientsWithInput)) { |
| 177 | if (!SmartScheduleDisable) { |
| 178 | someReady = TRUE; |
| 179 | waittime.tv_sec = 0; |
| 180 | waittime.tv_usec = 0; |
| 181 | wt = &waittime; |
| 182 | } |
| 183 | else { |
| 184 | XFD_COPYSET(&ClientsWithInput, &clientsReadable); |
| 185 | break; |
| 186 | } |
| 187 | } |
| 188 | if (someReady) { |
| 189 | XFD_COPYSET(&AllSockets, &LastSelectMask); |
| 190 | XFD_UNSET(&LastSelectMask, &ClientsWithInput); |
| 191 | } |
| 192 | else { |
| 193 | wt = NULL; |
| 194 | if (timers) { |
| 195 | now = GetTimeInMillis(); |
| 196 | timeout = timers->expires - now; |
| 197 | if (timeout > 0 && timeout > timers->delta + 250) { |
| 198 | /* time has rewound. reset the timers. */ |
| 199 | CheckAllTimers(); |
| 200 | } |
| 201 | |
| 202 | if (timers) { |
| 203 | timeout = timers->expires - now; |
| 204 | if (timeout < 0) |
| 205 | timeout = 0; |
| 206 | waittime.tv_sec = timeout / MILLI_PER_SECOND; |
| 207 | waittime.tv_usec = (timeout % MILLI_PER_SECOND) * |
| 208 | (1000000 / MILLI_PER_SECOND); |
| 209 | wt = &waittime; |
| 210 | } |
| 211 | } |
| 212 | XFD_COPYSET(&AllSockets, &LastSelectMask); |
| 213 | } |
| 214 | |
| 215 | BlockHandler((pointer) &wt, (pointer) &LastSelectMask); |
| 216 | if (NewOutputPending) |
| 217 | FlushAllOutput(); |
| 218 | /* keep this check close to select() call to minimize race */ |
| 219 | if (dispatchException) |
| 220 | i = -1; |
| 221 | else if (AnyClientsWriteBlocked) { |
| 222 | XFD_COPYSET(&ClientsWriteBlocked, &clientsWritable); |
| 223 | i = Select(MaxClients, &LastSelectMask, &clientsWritable, NULL, wt); |
| 224 | } |
| 225 | else { |
| 226 | i = Select(MaxClients, &LastSelectMask, NULL, NULL, wt); |
| 227 | } |
| 228 | selecterr = GetErrno(); |
| 229 | WakeupHandler(i, (pointer) &LastSelectMask); |
| 230 | if (i <= 0) { /* An error or timeout occurred */ |
| 231 | if (dispatchException) |
| 232 | return 0; |
| 233 | if (i < 0) { |
| 234 | if (selecterr == EBADF) { /* Some client disconnected */ |
| 235 | CheckConnections(); |
| 236 | if (!XFD_ANYSET(&AllClients)) |
| 237 | return 0; |
| 238 | } |
| 239 | else if (selecterr == EINVAL) { |
| 240 | FatalError("WaitForSomething(): select: %s\n", |
| 241 | strerror(selecterr)); |
| 242 | } |
| 243 | else if (selecterr != EINTR && selecterr != EAGAIN) { |
| 244 | ErrorF("WaitForSomething(): select: %s\n", |
| 245 | strerror(selecterr)); |
| 246 | } |
| 247 | } |
| 248 | else if (someReady) { |
| 249 | /* |
| 250 | * If no-one else is home, bail quickly |
| 251 | */ |
| 252 | XFD_COPYSET(&ClientsWithInput, &LastSelectMask); |
| 253 | XFD_COPYSET(&ClientsWithInput, &clientsReadable); |
| 254 | break; |
| 255 | } |
| 256 | if (*checkForInput[0] != *checkForInput[1]) |
| 257 | return 0; |
| 258 | |
| 259 | if (timers) { |
| 260 | int expired = 0; |
| 261 | |
| 262 | now = GetTimeInMillis(); |
| 263 | if ((int) (timers->expires - now) <= 0) |
| 264 | expired = 1; |
| 265 | |
| 266 | while (timers && (int) (timers->expires - now) <= 0) |
| 267 | DoTimer(timers, now, &timers); |
| 268 | |
| 269 | if (expired) |
| 270 | return 0; |
| 271 | } |
| 272 | } |
| 273 | else { |
| 274 | fd_set tmp_set; |
| 275 | |
| 276 | if (*checkForInput[0] == *checkForInput[1]) { |
| 277 | if (timers) { |
| 278 | int expired = 0; |
| 279 | |
| 280 | now = GetTimeInMillis(); |
| 281 | if ((int) (timers->expires - now) <= 0) |
| 282 | expired = 1; |
| 283 | |
| 284 | while (timers && (int) (timers->expires - now) <= 0) |
| 285 | DoTimer(timers, now, &timers); |
| 286 | |
| 287 | if (expired) |
| 288 | return 0; |
| 289 | } |
| 290 | } |
| 291 | if (someReady) |
| 292 | XFD_ORSET(&LastSelectMask, &ClientsWithInput, &LastSelectMask); |
| 293 | if (AnyClientsWriteBlocked && XFD_ANYSET(&clientsWritable)) { |
| 294 | NewOutputPending = TRUE; |
| 295 | XFD_ORSET(&OutputPending, &clientsWritable, &OutputPending); |
| 296 | XFD_UNSET(&ClientsWriteBlocked, &clientsWritable); |
| 297 | if (!XFD_ANYSET(&ClientsWriteBlocked)) |
| 298 | AnyClientsWriteBlocked = FALSE; |
| 299 | } |
| 300 | |
| 301 | XFD_ANDSET(&devicesReadable, &LastSelectMask, &EnabledDevices); |
| 302 | XFD_ANDSET(&clientsReadable, &LastSelectMask, &AllClients); |
| 303 | XFD_ANDSET(&tmp_set, &LastSelectMask, &WellKnownConnections); |
| 304 | if (XFD_ANYSET(&tmp_set)) |
| 305 | QueueWorkProc(EstablishNewConnections, NULL, |
| 306 | (pointer) &LastSelectMask); |
| 307 | |
| 308 | if (XFD_ANYSET(&devicesReadable) || XFD_ANYSET(&clientsReadable)) |
| 309 | break; |
| 310 | /* check here for DDXes that queue events during Block/Wakeup */ |
| 311 | if (*checkForInput[0] != *checkForInput[1]) |
| 312 | return 0; |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | nready = 0; |
| 317 | if (XFD_ANYSET(&clientsReadable)) { |
| 318 | #ifndef WIN32 |
| 319 | for (i = 0; i < howmany(XFD_SETSIZE, NFDBITS); i++) { |
| 320 | int highest_priority = 0; |
| 321 | |
| 322 | while (clientsReadable.fds_bits[i]) { |
| 323 | int client_priority, client_index; |
| 324 | |
| 325 | curclient = mffs(clientsReadable.fds_bits[i]) - 1; |
| 326 | client_index = /* raphael: modified */ |
| 327 | ConnectionTranslation[curclient + |
| 328 | (i * (sizeof(fd_mask) * 8))]; |
| 329 | #else |
| 330 | int highest_priority = 0; |
| 331 | fd_set savedClientsReadable; |
| 332 | |
| 333 | XFD_COPYSET(&clientsReadable, &savedClientsReadable); |
| 334 | for (i = 0; i < XFD_SETCOUNT(&savedClientsReadable); i++) { |
| 335 | int client_priority, client_index; |
| 336 | |
| 337 | curclient = XFD_FD(&savedClientsReadable, i); |
| 338 | client_index = GetConnectionTranslation(curclient); |
| 339 | #endif |
| 340 | /* We implement "strict" priorities. |
| 341 | * Only the highest priority client is returned to |
| 342 | * dix. If multiple clients at the same priority are |
| 343 | * ready, they are all returned. This means that an |
| 344 | * aggressive client could take over the server. |
| 345 | * This was not considered a big problem because |
| 346 | * aggressive clients can hose the server in so many |
| 347 | * other ways :) |
| 348 | */ |
| 349 | client_priority = clients[client_index]->priority; |
| 350 | if (nready == 0 || client_priority > highest_priority) { |
| 351 | /* Either we found the first client, or we found |
| 352 | * a client whose priority is greater than all others |
| 353 | * that have been found so far. Either way, we want |
| 354 | * to initialize the list of clients to contain just |
| 355 | * this client. |
| 356 | */ |
| 357 | pClientsReady[0] = client_index; |
| 358 | highest_priority = client_priority; |
| 359 | nready = 1; |
| 360 | } |
| 361 | /* the following if makes sure that multiple same-priority |
| 362 | * clients get batched together |
| 363 | */ |
| 364 | else if (client_priority == highest_priority) { |
| 365 | pClientsReady[nready++] = client_index; |
| 366 | } |
| 367 | #ifndef WIN32 |
| 368 | clientsReadable.fds_bits[i] &= ~(((fd_mask) 1L) << curclient); |
| 369 | } |
| 370 | #else |
| 371 | FD_CLR(curclient, &clientsReadable); |
| 372 | #endif |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | if (nready) |
| 377 | SmartScheduleStartTimer(); |
| 378 | |
| 379 | return nready; |
| 380 | } |
| 381 | |
| 382 | /* If time has rewound, re-run every affected timer. |
| 383 | * Timers might drop out of the list, so we have to restart every time. */ |
| 384 | static void |
| 385 | CheckAllTimers(void) |
| 386 | { |
| 387 | OsTimerPtr timer; |
| 388 | CARD32 now; |
| 389 | |
| 390 | OsBlockSignals(); |
| 391 | start: |
| 392 | now = GetTimeInMillis(); |
| 393 | |
| 394 | for (timer = timers; timer; timer = timer->next) { |
| 395 | if (timer->expires - now > timer->delta + 250) { |
| 396 | TimerForce(timer); |
| 397 | goto start; |
| 398 | } |
| 399 | } |
| 400 | OsReleaseSignals(); |
| 401 | } |
| 402 | |
| 403 | static void |
| 404 | DoTimer(OsTimerPtr timer, CARD32 now, OsTimerPtr *prev) |
| 405 | { |
| 406 | CARD32 newTime; |
| 407 | |
| 408 | OsBlockSignals(); |
| 409 | *prev = timer->next; |
| 410 | timer->next = NULL; |
| 411 | newTime = (*timer->callback) (timer, now, timer->arg); |
| 412 | if (newTime) |
| 413 | TimerSet(timer, 0, newTime, timer->callback, timer->arg); |
| 414 | OsReleaseSignals(); |
| 415 | } |
| 416 | |
| 417 | OsTimerPtr |
| 418 | TimerSet(OsTimerPtr timer, int flags, CARD32 millis, |
| 419 | OsTimerCallback func, pointer arg) |
| 420 | { |
| 421 | register OsTimerPtr *prev; |
| 422 | CARD32 now = GetTimeInMillis(); |
| 423 | |
| 424 | if (!timer) { |
| 425 | timer = malloc(sizeof(struct _OsTimerRec)); |
| 426 | if (!timer) |
| 427 | return NULL; |
| 428 | } |
| 429 | else { |
| 430 | OsBlockSignals(); |
| 431 | for (prev = &timers; *prev; prev = &(*prev)->next) { |
| 432 | if (*prev == timer) { |
| 433 | *prev = timer->next; |
| 434 | if (flags & TimerForceOld) |
| 435 | (void) (*timer->callback) (timer, now, timer->arg); |
| 436 | break; |
| 437 | } |
| 438 | } |
| 439 | OsReleaseSignals(); |
| 440 | } |
| 441 | if (!millis) |
| 442 | return timer; |
| 443 | if (flags & TimerAbsolute) { |
| 444 | timer->delta = millis - now; |
| 445 | } |
| 446 | else { |
| 447 | timer->delta = millis; |
| 448 | millis += now; |
| 449 | } |
| 450 | timer->expires = millis; |
| 451 | timer->callback = func; |
| 452 | timer->arg = arg; |
| 453 | if ((int) (millis - now) <= 0) { |
| 454 | timer->next = NULL; |
| 455 | millis = (*timer->callback) (timer, now, timer->arg); |
| 456 | if (!millis) |
| 457 | return timer; |
| 458 | } |
| 459 | OsBlockSignals(); |
| 460 | for (prev = &timers; |
| 461 | *prev && (int) ((*prev)->expires - millis) <= 0; |
| 462 | prev = &(*prev)->next); |
| 463 | timer->next = *prev; |
| 464 | *prev = timer; |
| 465 | OsReleaseSignals(); |
| 466 | return timer; |
| 467 | } |
| 468 | |
| 469 | Bool |
| 470 | TimerForce(OsTimerPtr timer) |
| 471 | { |
| 472 | int rc = FALSE; |
| 473 | OsTimerPtr *prev; |
| 474 | |
| 475 | OsBlockSignals(); |
| 476 | for (prev = &timers; *prev; prev = &(*prev)->next) { |
| 477 | if (*prev == timer) { |
| 478 | DoTimer(timer, GetTimeInMillis(), prev); |
| 479 | rc = TRUE; |
| 480 | break; |
| 481 | } |
| 482 | } |
| 483 | OsReleaseSignals(); |
| 484 | return rc; |
| 485 | } |
| 486 | |
| 487 | void |
| 488 | TimerCancel(OsTimerPtr timer) |
| 489 | { |
| 490 | OsTimerPtr *prev; |
| 491 | |
| 492 | if (!timer) |
| 493 | return; |
| 494 | OsBlockSignals(); |
| 495 | for (prev = &timers; *prev; prev = &(*prev)->next) { |
| 496 | if (*prev == timer) { |
| 497 | *prev = timer->next; |
| 498 | break; |
| 499 | } |
| 500 | } |
| 501 | OsReleaseSignals(); |
| 502 | } |
| 503 | |
| 504 | void |
| 505 | TimerFree(OsTimerPtr timer) |
| 506 | { |
| 507 | if (!timer) |
| 508 | return; |
| 509 | TimerCancel(timer); |
| 510 | free(timer); |
| 511 | } |
| 512 | |
| 513 | void |
| 514 | TimerCheck(void) |
| 515 | { |
| 516 | CARD32 now = GetTimeInMillis(); |
| 517 | |
| 518 | while (timers && (int) (timers->expires - now) <= 0) |
| 519 | DoTimer(timers, now, &timers); |
| 520 | } |
| 521 | |
| 522 | void |
| 523 | TimerInit(void) |
| 524 | { |
| 525 | OsTimerPtr timer; |
| 526 | |
| 527 | while ((timer = timers)) { |
| 528 | timers = timer->next; |
| 529 | free(timer); |
| 530 | } |
| 531 | } |
| 532 | |
| 533 | #ifdef DPMSExtension |
| 534 | |
| 535 | #define DPMS_CHECK_MODE(mode,time)\ |
| 536 | if (time > 0 && DPMSPowerLevel < mode && timeout >= time)\ |
| 537 | DPMSSet(serverClient, mode); |
| 538 | |
| 539 | #define DPMS_CHECK_TIMEOUT(time)\ |
| 540 | if (time > 0 && (time - timeout) > 0)\ |
| 541 | return time - timeout; |
| 542 | |
| 543 | static CARD32 |
| 544 | NextDPMSTimeout(INT32 timeout) |
| 545 | { |
| 546 | /* |
| 547 | * Return the amount of time remaining until we should set |
| 548 | * the next power level. Fallthroughs are intentional. |
| 549 | */ |
| 550 | switch (DPMSPowerLevel) { |
| 551 | case DPMSModeOn: |
| 552 | DPMS_CHECK_TIMEOUT(DPMSStandbyTime) |
| 553 | |
| 554 | case DPMSModeStandby: |
| 555 | DPMS_CHECK_TIMEOUT(DPMSSuspendTime) |
| 556 | |
| 557 | case DPMSModeSuspend: |
| 558 | DPMS_CHECK_TIMEOUT(DPMSOffTime) |
| 559 | |
| 560 | default: /* DPMSModeOff */ |
| 561 | return 0; |
| 562 | } |
| 563 | } |
| 564 | #endif /* DPMSExtension */ |
| 565 | |
| 566 | static CARD32 |
| 567 | ScreenSaverTimeoutExpire(OsTimerPtr timer, CARD32 now, pointer arg) |
| 568 | { |
| 569 | INT32 timeout = now - LastEventTime(XIAllDevices).milliseconds; |
| 570 | CARD32 nextTimeout = 0; |
| 571 | |
| 572 | #ifdef DPMSExtension |
| 573 | /* |
| 574 | * Check each mode lowest to highest, since a lower mode can |
| 575 | * have the same timeout as a higher one. |
| 576 | */ |
| 577 | if (DPMSEnabled) { |
| 578 | DPMS_CHECK_MODE(DPMSModeOff, DPMSOffTime) |
| 579 | DPMS_CHECK_MODE(DPMSModeSuspend, DPMSSuspendTime) |
| 580 | DPMS_CHECK_MODE(DPMSModeStandby, DPMSStandbyTime) |
| 581 | |
| 582 | nextTimeout = NextDPMSTimeout(timeout); |
| 583 | } |
| 584 | |
| 585 | /* |
| 586 | * Only do the screensaver checks if we're not in a DPMS |
| 587 | * power saving mode |
| 588 | */ |
| 589 | if (DPMSPowerLevel != DPMSModeOn) |
| 590 | return nextTimeout; |
| 591 | #endif /* DPMSExtension */ |
| 592 | |
| 593 | if (!ScreenSaverTime) |
| 594 | return nextTimeout; |
| 595 | |
| 596 | if (timeout < ScreenSaverTime) { |
| 597 | return nextTimeout > 0 ? |
| 598 | min(ScreenSaverTime - timeout, nextTimeout) : |
| 599 | ScreenSaverTime - timeout; |
| 600 | } |
| 601 | |
| 602 | ResetOsBuffers(); /* not ideal, but better than nothing */ |
| 603 | dixSaveScreens(serverClient, SCREEN_SAVER_ON, ScreenSaverActive); |
| 604 | |
| 605 | if (ScreenSaverInterval > 0) { |
| 606 | nextTimeout = nextTimeout > 0 ? |
| 607 | min(ScreenSaverInterval, nextTimeout) : ScreenSaverInterval; |
| 608 | } |
| 609 | |
| 610 | return nextTimeout; |
| 611 | } |
| 612 | |
| 613 | static OsTimerPtr ScreenSaverTimer = NULL; |
| 614 | |
| 615 | void |
| 616 | FreeScreenSaverTimer(void) |
| 617 | { |
| 618 | if (ScreenSaverTimer) { |
| 619 | TimerFree(ScreenSaverTimer); |
| 620 | ScreenSaverTimer = NULL; |
| 621 | } |
| 622 | } |
| 623 | |
| 624 | void |
| 625 | SetScreenSaverTimer(void) |
| 626 | { |
| 627 | CARD32 timeout = 0; |
| 628 | |
| 629 | #ifdef DPMSExtension |
| 630 | if (DPMSEnabled) { |
| 631 | /* |
| 632 | * A higher DPMS level has a timeout that's either less |
| 633 | * than or equal to that of a lower DPMS level. |
| 634 | */ |
| 635 | if (DPMSStandbyTime > 0) |
| 636 | timeout = DPMSStandbyTime; |
| 637 | |
| 638 | else if (DPMSSuspendTime > 0) |
| 639 | timeout = DPMSSuspendTime; |
| 640 | |
| 641 | else if (DPMSOffTime > 0) |
| 642 | timeout = DPMSOffTime; |
| 643 | } |
| 644 | #endif |
| 645 | |
| 646 | if (ScreenSaverTime > 0) { |
| 647 | timeout = timeout > 0 ? min(ScreenSaverTime, timeout) : ScreenSaverTime; |
| 648 | } |
| 649 | |
| 650 | #ifdef SCREENSAVER |
| 651 | if (timeout && !screenSaverSuspended) { |
| 652 | #else |
| 653 | if (timeout) { |
| 654 | #endif |
| 655 | ScreenSaverTimer = TimerSet(ScreenSaverTimer, 0, timeout, |
| 656 | ScreenSaverTimeoutExpire, NULL); |
| 657 | } |
| 658 | else if (ScreenSaverTimer) { |
| 659 | FreeScreenSaverTimer(); |
| 660 | } |
| 661 | } |