reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1 | /* libs/graphics/views/SkEvent.cpp |
| 2 | ** |
| 3 | ** Copyright 2006, The Android Open Source Project |
| 4 | ** |
| 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 |
| 8 | ** |
| 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | ** |
| 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 |
| 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #include "SkEvent.h" |
| 19 | |
| 20 | void SkEvent::initialize(const char* type, size_t typeLen) { |
| 21 | fType = NULL; |
| 22 | setType(type, typeLen); |
| 23 | f32 = 0; |
| 24 | #ifdef SK_DEBUG |
| 25 | fTargetID = 0; |
| 26 | fTime = 0; |
| 27 | fNextEvent = NULL; |
| 28 | #endif |
| 29 | SkDEBUGCODE(fDebugTrace = false;) |
| 30 | } |
| 31 | |
| 32 | SkEvent::SkEvent() |
| 33 | { |
| 34 | initialize("", 0); |
| 35 | } |
| 36 | |
| 37 | SkEvent::SkEvent(const SkEvent& src) |
| 38 | { |
| 39 | *this = src; |
| 40 | if (((size_t) fType & 1) == 0) |
| 41 | setType(src.fType); |
| 42 | } |
| 43 | |
| 44 | SkEvent::SkEvent(const SkString& type) |
| 45 | { |
| 46 | initialize(type.c_str(), type.size()); |
| 47 | } |
| 48 | |
| 49 | SkEvent::SkEvent(const char type[]) |
| 50 | { |
| 51 | SkASSERT(type); |
| 52 | initialize(type, strlen(type)); |
| 53 | } |
| 54 | |
| 55 | SkEvent::~SkEvent() |
| 56 | { |
| 57 | if (((size_t) fType & 1) == 0) |
| 58 | sk_free((void*) fType); |
| 59 | } |
| 60 | |
| 61 | static size_t makeCharArray(char* buffer, size_t compact) |
| 62 | { |
| 63 | size_t bits = (size_t) compact >> 1; |
| 64 | memcpy(buffer, &bits, sizeof(compact)); |
| 65 | buffer[sizeof(compact)] = 0; |
| 66 | return strlen(buffer); |
| 67 | } |
| 68 | |
| 69 | #if 0 |
| 70 | const char* SkEvent::getType() const |
| 71 | { |
| 72 | if ((size_t) fType & 1) { // not a pointer |
| 73 | char chars[sizeof(size_t) + 1]; |
| 74 | size_t len = makeCharArray(chars, (size_t) fType); |
| 75 | fType = (char*) sk_malloc_throw(len); |
| 76 | SkASSERT(((size_t) fType & 1) == 0); |
| 77 | memcpy(fType, chars, len); |
| 78 | } |
| 79 | return fType; |
| 80 | } |
| 81 | #endif |
| 82 | |
| 83 | void SkEvent::getType(SkString* str) const |
| 84 | { |
| 85 | if (str) |
| 86 | { |
| 87 | if ((size_t) fType & 1) // not a pointer |
| 88 | { |
| 89 | char chars[sizeof(size_t) + 1]; |
| 90 | size_t len = makeCharArray(chars, (size_t) fType); |
| 91 | str->set(chars, len); |
| 92 | } |
| 93 | else |
| 94 | str->set(fType); |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | bool SkEvent::isType(const SkString& str) const |
| 99 | { |
| 100 | return this->isType(str.c_str(), str.size()); |
| 101 | } |
| 102 | |
| 103 | bool SkEvent::isType(const char type[], size_t typeLen) const |
| 104 | { |
| 105 | if (typeLen == 0) |
| 106 | typeLen = strlen(type); |
| 107 | if ((size_t) fType & 1) { // not a pointer |
| 108 | char chars[sizeof(size_t) + 1]; |
| 109 | size_t len = makeCharArray(chars, (size_t) fType); |
| 110 | return len == typeLen && strncmp(chars, type, typeLen) == 0; |
| 111 | } |
| 112 | return strncmp(fType, type, typeLen) == 0 && fType[typeLen] == 0; |
| 113 | } |
| 114 | |
| 115 | void SkEvent::setType(const char type[], size_t typeLen) |
| 116 | { |
| 117 | if (typeLen == 0) |
| 118 | typeLen = strlen(type); |
| 119 | if (typeLen <= sizeof(fType)) { |
| 120 | size_t slot = 0; |
| 121 | memcpy(&slot, type, typeLen); |
| 122 | if (slot << 1 >> 1 != slot) |
| 123 | goto useCharStar; |
| 124 | slot <<= 1; |
| 125 | slot |= 1; |
| 126 | fType = (char*) slot; |
| 127 | } else { |
| 128 | useCharStar: |
| 129 | fType = (char*) sk_malloc_throw(typeLen + 1); |
| 130 | SkASSERT(((size_t) fType & 1) == 0); |
| 131 | memcpy(fType, type, typeLen); |
| 132 | fType[typeLen] = 0; |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | void SkEvent::setType(const SkString& type) |
| 137 | { |
| 138 | setType(type.c_str()); |
| 139 | } |
| 140 | |
| 141 | //////////////////////////////////////////////////////////////////////////// |
| 142 | |
| 143 | #include "SkParse.h" |
| 144 | |
| 145 | void SkEvent::inflate(const SkDOM& dom, const SkDOM::Node* node) |
| 146 | { |
| 147 | const char* name = dom.findAttr(node, "type"); |
| 148 | if (name) |
| 149 | this->setType(name); |
| 150 | |
| 151 | const char* value; |
| 152 | if ((value = dom.findAttr(node, "fast32")) != NULL) |
| 153 | { |
| 154 | int32_t n; |
| 155 | if (SkParse::FindS32(value, &n)) |
| 156 | this->setFast32(n); |
| 157 | } |
| 158 | |
| 159 | for (node = dom.getFirstChild(node); node; node = dom.getNextSibling(node)) |
| 160 | { |
| 161 | if (strcmp(dom.getName(node), "data")) |
| 162 | { |
| 163 | SkDEBUGCODE(SkDebugf("SkEvent::inflate unrecognized subelement <%s>\n", dom.getName(node));) |
| 164 | continue; |
| 165 | } |
| 166 | |
| 167 | name = dom.findAttr(node, "name"); |
| 168 | if (name == NULL) |
| 169 | { |
| 170 | SkDEBUGCODE(SkDebugf("SkEvent::inflate missing required \"name\" attribute in <data> subelement\n");) |
| 171 | continue; |
| 172 | } |
| 173 | |
| 174 | if ((value = dom.findAttr(node, "s32")) != NULL) |
| 175 | { |
| 176 | int32_t n; |
| 177 | if (SkParse::FindS32(value, &n)) |
| 178 | this->setS32(name, n); |
| 179 | } |
| 180 | else if ((value = dom.findAttr(node, "scalar")) != NULL) |
| 181 | { |
| 182 | SkScalar x; |
| 183 | if (SkParse::FindScalar(value, &x)) |
| 184 | this->setScalar(name, x); |
| 185 | } |
| 186 | else if ((value = dom.findAttr(node, "string")) != NULL) |
| 187 | this->setString(name, value); |
| 188 | #ifdef SK_DEBUG |
| 189 | else |
| 190 | { |
| 191 | SkDebugf("SkEvent::inflate <data name=\"%s\"> subelement missing required type attribute [S32 | scalar | string]\n", name); |
| 192 | } |
| 193 | #endif |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | #ifdef SK_DEBUG |
| 198 | |
| 199 | #ifndef SkScalarToFloat |
| 200 | #define SkScalarToFloat(x) ((x) / 65536.f) |
| 201 | #endif |
| 202 | |
| 203 | void SkEvent::dump(const char title[]) |
| 204 | { |
| 205 | if (title) |
| 206 | SkDebugf("%s ", title); |
| 207 | |
| 208 | SkString etype; |
| 209 | this->getType(&etype); |
| 210 | SkDebugf("event<%s> fast32=%d", etype.c_str(), this->getFast32()); |
| 211 | |
| 212 | const SkMetaData& md = this->getMetaData(); |
| 213 | SkMetaData::Iter iter(md); |
| 214 | SkMetaData::Type mtype; |
| 215 | int count; |
| 216 | const char* name; |
| 217 | |
| 218 | while ((name = iter.next(&mtype, &count)) != NULL) |
| 219 | { |
| 220 | SkASSERT(count > 0); |
| 221 | |
| 222 | SkDebugf(" <%s>=", name); |
| 223 | switch (mtype) { |
| 224 | case SkMetaData::kS32_Type: // vector version??? |
| 225 | { |
| 226 | int32_t value; |
| 227 | md.findS32(name, &value); |
| 228 | SkDebugf("%d ", value); |
| 229 | } |
| 230 | break; |
| 231 | case SkMetaData::kScalar_Type: |
| 232 | { |
| 233 | const SkScalar* values = md.findScalars(name, &count, NULL); |
| 234 | SkDebugf("%f", SkScalarToFloat(values[0])); |
| 235 | for (int i = 1; i < count; i++) |
| 236 | SkDebugf(", %f", SkScalarToFloat(values[i])); |
| 237 | SkDebugf(" "); |
| 238 | } |
| 239 | break; |
| 240 | case SkMetaData::kString_Type: |
| 241 | { |
| 242 | const char* value = md.findString(name); |
| 243 | SkASSERT(value); |
| 244 | SkDebugf("<%s> ", value); |
| 245 | } |
| 246 | break; |
| 247 | case SkMetaData::kPtr_Type: // vector version??? |
| 248 | { |
| 249 | void* value; |
| 250 | md.findPtr(name, &value); |
| 251 | SkDebugf("%p ", value); |
| 252 | } |
| 253 | break; |
| 254 | case SkMetaData::kBool_Type: // vector version??? |
| 255 | { |
| 256 | bool value; |
| 257 | md.findBool(name, &value); |
| 258 | SkDebugf("%s ", value ? "true" : "false"); |
| 259 | } |
| 260 | break; |
| 261 | default: |
| 262 | SkASSERT(!"unknown metadata type returned from iterator"); |
| 263 | break; |
| 264 | } |
| 265 | } |
| 266 | SkDebugf("\n"); |
| 267 | } |
| 268 | #endif |
| 269 | |
| 270 | /////////////////////////////////////////////////////////////////////////////////////// |
| 271 | |
| 272 | #ifdef SK_DEBUG |
| 273 | // #define SK_TRACE_EVENTSx |
| 274 | #endif |
| 275 | |
| 276 | #ifdef SK_TRACE_EVENTS |
| 277 | static void event_log(const char s[]) |
| 278 | { |
| 279 | SkDEBUGF(("%s\n", s)); |
| 280 | } |
| 281 | |
| 282 | #define EVENT_LOG(s) event_log(s) |
| 283 | #define EVENT_LOGN(s, n) do { SkString str(s); str.append(" "); str.appendS32(n); event_log(str.c_str()); } while (0) |
| 284 | #else |
| 285 | #define EVENT_LOG(s) |
| 286 | #define EVENT_LOGN(s, n) |
| 287 | #endif |
| 288 | |
| 289 | #include "SkGlobals.h" |
| 290 | #include "SkThread.h" |
| 291 | #include "SkTime.h" |
| 292 | |
| 293 | #define SK_Event_GlobalsTag SkSetFourByteTag('e', 'v', 'n', 't') |
| 294 | |
| 295 | class SkEvent_Globals : public SkGlobals::Rec { |
| 296 | public: |
| 297 | SkMutex fEventMutex; |
| 298 | SkEvent* fEventQHead, *fEventQTail; |
| 299 | SkEvent* fDelayQHead; |
| 300 | SkDEBUGCODE(int fEventCounter;) |
| 301 | }; |
| 302 | |
| 303 | static SkGlobals::Rec* create_globals() |
| 304 | { |
| 305 | SkEvent_Globals* rec = new SkEvent_Globals; |
| 306 | rec->fEventQHead = NULL; |
| 307 | rec->fEventQTail = NULL; |
| 308 | rec->fDelayQHead = NULL; |
| 309 | SkDEBUGCODE(rec->fEventCounter = 0;) |
| 310 | return rec; |
| 311 | } |
| 312 | |
| 313 | bool SkEvent::Post(SkEvent* evt, SkEventSinkID sinkID, SkMSec delay) |
| 314 | { |
| 315 | if (delay) |
| 316 | return SkEvent::PostTime(evt, sinkID, SkTime::GetMSecs() + delay); |
| 317 | |
| 318 | SkEvent_Globals& globals = *(SkEvent_Globals*)SkGlobals::Find(SK_Event_GlobalsTag, create_globals); |
| 319 | |
| 320 | evt->fTargetID = sinkID; |
| 321 | |
| 322 | #ifdef SK_TRACE_EVENTS |
| 323 | { |
| 324 | SkString str("SkEvent::Post("); |
| 325 | str.append(evt->getType()); |
| 326 | str.append(", 0x"); |
| 327 | str.appendHex(sinkID); |
| 328 | str.append(", "); |
| 329 | str.appendS32(delay); |
| 330 | str.append(")"); |
| 331 | event_log(str.c_str()); |
| 332 | } |
| 333 | #endif |
| 334 | |
| 335 | globals.fEventMutex.acquire(); |
| 336 | bool wasEmpty = SkEvent::Enqueue(evt); |
| 337 | globals.fEventMutex.release(); |
| 338 | |
| 339 | // call outside of us holding the mutex |
| 340 | if (wasEmpty) |
| 341 | SkEvent::SignalNonEmptyQueue(); |
| 342 | return true; |
| 343 | } |
| 344 | |
| 345 | #if defined(SK_SIMULATE_FAILED_MALLOC) && defined(SK_FIND_MEMORY_LEAKS) |
| 346 | SkMSec gMaxDrawTime; |
| 347 | #endif |
| 348 | |
| 349 | bool SkEvent::PostTime(SkEvent* evt, SkEventSinkID sinkID, SkMSec time) |
| 350 | { |
| 351 | #if defined(SK_SIMULATE_FAILED_MALLOC) && defined(SK_FIND_MEMORY_LEAKS) |
| 352 | gMaxDrawTime = time; |
| 353 | #endif |
| 354 | SkEvent_Globals& globals = *(SkEvent_Globals*)SkGlobals::Find(SK_Event_GlobalsTag, create_globals); |
| 355 | |
| 356 | evt->fTargetID = sinkID; |
| 357 | |
| 358 | #ifdef SK_TRACE_EVENTS |
| 359 | { |
| 360 | SkString str("SkEvent::Post("); |
| 361 | str.append(evt->getType()); |
| 362 | str.append(", 0x"); |
| 363 | str.appendHex(sinkID); |
| 364 | str.append(", "); |
| 365 | str.appendS32(time); |
| 366 | str.append(")"); |
| 367 | event_log(str.c_str()); |
| 368 | } |
| 369 | #endif |
| 370 | |
| 371 | globals.fEventMutex.acquire(); |
| 372 | SkMSec queueDelay = SkEvent::EnqueueTime(evt, time); |
| 373 | globals.fEventMutex.release(); |
| 374 | |
| 375 | // call outside of us holding the mutex |
| 376 | if ((int32_t)queueDelay != ~0) |
| 377 | SkEvent::SignalQueueTimer(queueDelay); |
| 378 | return true; |
| 379 | } |
| 380 | |
| 381 | bool SkEvent::Enqueue(SkEvent* evt) |
| 382 | { |
| 383 | SkEvent_Globals& globals = *(SkEvent_Globals*)SkGlobals::Find(SK_Event_GlobalsTag, create_globals); |
| 384 | // gEventMutex acquired by caller |
| 385 | |
| 386 | SkASSERT(evt); |
| 387 | |
| 388 | bool wasEmpty = globals.fEventQHead == NULL; |
| 389 | |
| 390 | if (globals.fEventQTail) |
| 391 | globals.fEventQTail->fNextEvent = evt; |
| 392 | globals.fEventQTail = evt; |
| 393 | if (globals.fEventQHead == NULL) |
| 394 | globals.fEventQHead = evt; |
| 395 | evt->fNextEvent = NULL; |
| 396 | |
| 397 | SkDEBUGCODE(++globals.fEventCounter); |
| 398 | // SkDebugf("Enqueue: count=%d\n", gEventCounter); |
| 399 | |
| 400 | return wasEmpty; |
| 401 | } |
| 402 | |
| 403 | SkEvent* SkEvent::Dequeue(SkEventSinkID* sinkID) |
| 404 | { |
| 405 | SkEvent_Globals& globals = *(SkEvent_Globals*)SkGlobals::Find(SK_Event_GlobalsTag, create_globals); |
| 406 | globals.fEventMutex.acquire(); |
| 407 | |
| 408 | SkEvent* evt = globals.fEventQHead; |
| 409 | if (evt) |
| 410 | { |
| 411 | SkDEBUGCODE(--globals.fEventCounter); |
| 412 | |
| 413 | if (sinkID) |
| 414 | *sinkID = evt->fTargetID; |
| 415 | |
| 416 | globals.fEventQHead = evt->fNextEvent; |
| 417 | if (globals.fEventQHead == NULL) |
| 418 | globals.fEventQTail = NULL; |
| 419 | } |
| 420 | globals.fEventMutex.release(); |
| 421 | |
| 422 | // SkDebugf("Dequeue: count=%d\n", gEventCounter); |
| 423 | |
| 424 | return evt; |
| 425 | } |
| 426 | |
| 427 | bool SkEvent::QHasEvents() |
| 428 | { |
| 429 | SkEvent_Globals& globals = *(SkEvent_Globals*)SkGlobals::Find(SK_Event_GlobalsTag, create_globals); |
| 430 | |
| 431 | // this is not thread accurate, need a semaphore for that |
| 432 | return globals.fEventQHead != NULL; |
| 433 | } |
| 434 | |
| 435 | #ifdef SK_TRACE_EVENTS |
| 436 | static int gDelayDepth; |
| 437 | #endif |
| 438 | |
| 439 | SkMSec SkEvent::EnqueueTime(SkEvent* evt, SkMSec time) |
| 440 | { |
| 441 | #ifdef SK_TRACE_EVENTS |
| 442 | SkDebugf("enqueue-delay %s %d (%d)", evt->getType(), time, gDelayDepth); |
| 443 | const char* idStr = evt->findString("id"); |
| 444 | if (idStr) |
| 445 | SkDebugf(" (%s)", idStr); |
| 446 | SkDebugf("\n"); |
| 447 | ++gDelayDepth; |
| 448 | #endif |
| 449 | |
| 450 | SkEvent_Globals& globals = *(SkEvent_Globals*)SkGlobals::Find(SK_Event_GlobalsTag, create_globals); |
| 451 | // gEventMutex acquired by caller |
| 452 | |
| 453 | SkEvent* curr = globals.fDelayQHead; |
| 454 | SkEvent* prev = NULL; |
| 455 | |
| 456 | while (curr) |
| 457 | { |
| 458 | if (SkMSec_LT(time, curr->fTime)) |
| 459 | break; |
| 460 | prev = curr; |
| 461 | curr = curr->fNextEvent; |
| 462 | } |
| 463 | |
| 464 | evt->fTime = time; |
| 465 | evt->fNextEvent = curr; |
| 466 | if (prev == NULL) |
| 467 | globals.fDelayQHead = evt; |
| 468 | else |
| 469 | prev->fNextEvent = evt; |
| 470 | |
| 471 | SkMSec delay = globals.fDelayQHead->fTime - SkTime::GetMSecs(); |
| 472 | if ((int32_t)delay <= 0) |
| 473 | delay = 1; |
| 474 | return delay; |
| 475 | } |
| 476 | |
| 477 | ////////////////////////////////////////////////////////////////////////////// |
| 478 | |
| 479 | #include "SkEventSink.h" |
| 480 | |
| 481 | bool SkEvent::ProcessEvent() |
| 482 | { |
| 483 | SkEventSinkID sinkID; |
| 484 | SkEvent* evt = SkEvent::Dequeue(&sinkID); |
| 485 | SkAutoTDelete<SkEvent> autoDelete(evt); |
| 486 | bool again = false; |
| 487 | |
| 488 | EVENT_LOGN("ProcessEvent", (int32_t)evt); |
| 489 | |
| 490 | if (evt) |
| 491 | { |
| 492 | (void)SkEventSink::DoEvent(*evt, sinkID); |
| 493 | again = SkEvent::QHasEvents(); |
| 494 | } |
| 495 | return again; |
| 496 | } |
| 497 | |
| 498 | void SkEvent::ServiceQueueTimer() |
| 499 | { |
| 500 | SkEvent_Globals& globals = *(SkEvent_Globals*)SkGlobals::Find(SK_Event_GlobalsTag, create_globals); |
| 501 | |
| 502 | globals.fEventMutex.acquire(); |
| 503 | |
| 504 | bool wasEmpty = false; |
| 505 | SkMSec now = SkTime::GetMSecs(); |
| 506 | SkEvent* evt = globals.fDelayQHead; |
| 507 | |
| 508 | while (evt) |
| 509 | { |
| 510 | if (SkMSec_LT(now, evt->fTime)) |
| 511 | break; |
| 512 | |
| 513 | #ifdef SK_TRACE_EVENTS |
| 514 | --gDelayDepth; |
| 515 | SkDebugf("dequeue-delay %s (%d)", evt->getType(), gDelayDepth); |
| 516 | const char* idStr = evt->findString("id"); |
| 517 | if (idStr) |
| 518 | SkDebugf(" (%s)", idStr); |
| 519 | SkDebugf("\n"); |
| 520 | #endif |
| 521 | |
| 522 | SkEvent* next = evt->fNextEvent; |
| 523 | if (SkEvent::Enqueue(evt)) |
| 524 | wasEmpty = true; |
| 525 | evt = next; |
| 526 | } |
| 527 | globals.fDelayQHead = evt; |
| 528 | |
| 529 | SkMSec time = evt ? evt->fTime - now : 0; |
| 530 | |
| 531 | globals.fEventMutex.release(); |
| 532 | |
| 533 | if (wasEmpty) |
| 534 | SkEvent::SignalNonEmptyQueue(); |
| 535 | |
| 536 | SkEvent::SignalQueueTimer(time); |
| 537 | } |
| 538 | |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame^] | 539 | int SkEvent::CountEventsOnQueue() { |
| 540 | SkEvent_Globals& globals = *(SkEvent_Globals*)SkGlobals::Find(SK_Event_GlobalsTag, create_globals); |
| 541 | globals.fEventMutex.acquire(); |
| 542 | |
| 543 | int count = 0; |
| 544 | const SkEvent* evt = globals.fEventQHead; |
| 545 | while (evt) { |
| 546 | count += 1; |
| 547 | evt = evt->fNextEvent; |
| 548 | } |
| 549 | globals.fEventMutex.release(); |
| 550 | |
| 551 | return count; |
| 552 | } |
| 553 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 554 | //////////////////////////////////////////////////////////////// |
| 555 | |
| 556 | void SkEvent::Init() |
| 557 | { |
| 558 | } |
| 559 | |
| 560 | void SkEvent::Term() |
| 561 | { |
| 562 | SkEvent_Globals& globals = *(SkEvent_Globals*)SkGlobals::Find(SK_Event_GlobalsTag, create_globals); |
| 563 | |
| 564 | SkEvent* evt = globals.fEventQHead; |
| 565 | while (evt) |
| 566 | { |
| 567 | SkEvent* next = evt->fNextEvent; |
| 568 | delete evt; |
| 569 | evt = next; |
| 570 | } |
| 571 | |
| 572 | evt = globals.fDelayQHead; |
| 573 | while (evt) |
| 574 | { |
| 575 | SkEvent* next = evt->fNextEvent; |
| 576 | delete evt; |
| 577 | evt = next; |
| 578 | } |
| 579 | } |
| 580 | |