SensorService.cpp revision 678f4fce90b5ed2794007cc8c63fce0c1b962404
1/* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include <inttypes.h> 18#include <math.h> 19#include <stdint.h> 20#include <sys/types.h> 21#include <sys/socket.h> 22 23#include <cutils/properties.h> 24 25#include <utils/SortedVector.h> 26#include <utils/KeyedVector.h> 27#include <utils/threads.h> 28#include <utils/Atomic.h> 29#include <utils/Errors.h> 30#include <utils/RefBase.h> 31#include <utils/Singleton.h> 32#include <utils/String16.h> 33 34#include <binder/BinderService.h> 35#include <binder/IServiceManager.h> 36#include <binder/PermissionCache.h> 37 38#include <gui/ISensorServer.h> 39#include <gui/ISensorEventConnection.h> 40#include <gui/SensorEventQueue.h> 41 42#include <hardware/sensors.h> 43#include <hardware_legacy/power.h> 44 45#include "BatteryService.h" 46#include "CorrectedGyroSensor.h" 47#include "GravitySensor.h" 48#include "LinearAccelerationSensor.h" 49#include "OrientationSensor.h" 50#include "RotationVectorSensor.h" 51#include "SensorFusion.h" 52#include "SensorService.h" 53 54namespace android { 55// --------------------------------------------------------------------------- 56 57/* 58 * Notes: 59 * 60 * - what about a gyro-corrected magnetic-field sensor? 61 * - run mag sensor from time to time to force calibration 62 * - gravity sensor length is wrong (=> drift in linear-acc sensor) 63 * 64 */ 65 66const char* SensorService::WAKE_LOCK_NAME = "SensorService"; 67 68SensorService::SensorService() 69 : mInitCheck(NO_INIT) 70{ 71} 72 73void SensorService::onFirstRef() 74{ 75 ALOGD("nuSensorService starting..."); 76 77 SensorDevice& dev(SensorDevice::getInstance()); 78 79 if (dev.initCheck() == NO_ERROR) { 80 sensor_t const* list; 81 ssize_t count = dev.getSensorList(&list); 82 if (count > 0) { 83 ssize_t orientationIndex = -1; 84 bool hasGyro = false; 85 uint32_t virtualSensorsNeeds = 86 (1<<SENSOR_TYPE_GRAVITY) | 87 (1<<SENSOR_TYPE_LINEAR_ACCELERATION) | 88 (1<<SENSOR_TYPE_ROTATION_VECTOR); 89 90 mLastEventSeen.setCapacity(count); 91 for (ssize_t i=0 ; i<count ; i++) { 92 registerSensor( new HardwareSensor(list[i]) ); 93 switch (list[i].type) { 94 case SENSOR_TYPE_ORIENTATION: 95 orientationIndex = i; 96 break; 97 case SENSOR_TYPE_GYROSCOPE: 98 case SENSOR_TYPE_GYROSCOPE_UNCALIBRATED: 99 hasGyro = true; 100 break; 101 case SENSOR_TYPE_GRAVITY: 102 case SENSOR_TYPE_LINEAR_ACCELERATION: 103 case SENSOR_TYPE_ROTATION_VECTOR: 104 virtualSensorsNeeds &= ~(1<<list[i].type); 105 break; 106 } 107 } 108 109 // it's safe to instantiate the SensorFusion object here 110 // (it wants to be instantiated after h/w sensors have been 111 // registered) 112 const SensorFusion& fusion(SensorFusion::getInstance()); 113 114 // build the sensor list returned to users 115 mUserSensorList = mSensorList; 116 117 if (hasGyro) { 118 Sensor aSensor; 119 120 // Add Android virtual sensors if they're not already 121 // available in the HAL 122 123 aSensor = registerVirtualSensor( new RotationVectorSensor() ); 124 if (virtualSensorsNeeds & (1<<SENSOR_TYPE_ROTATION_VECTOR)) { 125 mUserSensorList.add(aSensor); 126 } 127 128 aSensor = registerVirtualSensor( new GravitySensor(list, count) ); 129 if (virtualSensorsNeeds & (1<<SENSOR_TYPE_GRAVITY)) { 130 mUserSensorList.add(aSensor); 131 } 132 133 aSensor = registerVirtualSensor( new LinearAccelerationSensor(list, count) ); 134 if (virtualSensorsNeeds & (1<<SENSOR_TYPE_LINEAR_ACCELERATION)) { 135 mUserSensorList.add(aSensor); 136 } 137 138 aSensor = registerVirtualSensor( new OrientationSensor() ); 139 if (virtualSensorsNeeds & (1<<SENSOR_TYPE_ROTATION_VECTOR)) { 140 // if we are doing our own rotation-vector, also add 141 // the orientation sensor and remove the HAL provided one. 142 mUserSensorList.replaceAt(aSensor, orientationIndex); 143 } 144 145 // virtual debugging sensors are not added to mUserSensorList 146 registerVirtualSensor( new CorrectedGyroSensor(list, count) ); 147 registerVirtualSensor( new GyroDriftSensor() ); 148 } 149 150 // debugging sensor list 151 mUserSensorListDebug = mSensorList; 152 153 // Check if the device really supports batching by looking at the FIFO event 154 // counts for each sensor. 155 bool batchingSupported = false; 156 for (int i = 0; i < mSensorList.size(); ++i) { 157 if (mSensorList[i].getFifoMaxEventCount() > 0) { 158 batchingSupported = true; 159 break; 160 } 161 } 162 163 if (batchingSupported) { 164 // Increase socket buffer size to a max of 100 KB for batching capabilities. 165 mSocketBufferSize = MAX_SOCKET_BUFFER_SIZE_BATCHED; 166 } else { 167 mSocketBufferSize = SOCKET_BUFFER_SIZE_NON_BATCHED; 168 } 169 170 // Compare the socketBufferSize value against the system limits and limit 171 // it to maxSystemSocketBufferSize if necessary. 172 FILE *fp = fopen("/proc/sys/net/core/wmem_max", "r"); 173 char line[128]; 174 if (fp != NULL && fgets(line, sizeof(line), fp) != NULL) { 175 line[sizeof(line) - 1] = '\0'; 176 size_t maxSystemSocketBufferSize; 177 sscanf(line, "%zu", &maxSystemSocketBufferSize); 178 if (mSocketBufferSize > maxSystemSocketBufferSize) { 179 mSocketBufferSize = maxSystemSocketBufferSize; 180 } 181 } 182 if (fp) { 183 fclose(fp); 184 } 185 186 mWakeLockAcquired = false; 187 run("SensorService", PRIORITY_URGENT_DISPLAY); 188 mLooper = new Looper(false); 189 190 const size_t minBufferSize = SensorEventQueue::MAX_RECEIVE_BUFFER_EVENT_COUNT; 191 mSensorEventBuffer = new sensors_event_t[minBufferSize]; 192 mSensorEventScratch = new sensors_event_t[minBufferSize]; 193 mMapFlushEventsToConnections = new SensorEventConnection const * [minBufferSize]; 194 mInitCheck = NO_ERROR; 195 } 196 } 197} 198 199Sensor SensorService::registerSensor(SensorInterface* s) 200{ 201 sensors_event_t event; 202 memset(&event, 0, sizeof(event)); 203 204 const Sensor sensor(s->getSensor()); 205 // add to the sensor list (returned to clients) 206 mSensorList.add(sensor); 207 // add to our handle->SensorInterface mapping 208 mSensorMap.add(sensor.getHandle(), s); 209 // create an entry in the mLastEventSeen array 210 mLastEventSeen.add(sensor.getHandle(), event); 211 212 return sensor; 213} 214 215Sensor SensorService::registerVirtualSensor(SensorInterface* s) 216{ 217 Sensor sensor = registerSensor(s); 218 mVirtualSensorList.add( s ); 219 return sensor; 220} 221 222SensorService::~SensorService() 223{ 224 for (size_t i=0 ; i<mSensorMap.size() ; i++) 225 delete mSensorMap.valueAt(i); 226} 227 228static const String16 sDump("android.permission.DUMP"); 229 230status_t SensorService::dump(int fd, const Vector<String16>& /*args*/) 231{ 232 String8 result; 233 if (!PermissionCache::checkCallingPermission(sDump)) { 234 result.appendFormat("Permission Denial: " 235 "can't dump SensorService from pid=%d, uid=%d\n", 236 IPCThreadState::self()->getCallingPid(), 237 IPCThreadState::self()->getCallingUid()); 238 } else { 239 Mutex::Autolock _l(mLock); 240 result.append("Sensor List:\n"); 241 for (size_t i=0 ; i<mSensorList.size() ; i++) { 242 const Sensor& s(mSensorList[i]); 243 const sensors_event_t& e(mLastEventSeen.valueFor(s.getHandle())); 244 result.appendFormat( 245 "%-15s| %-10s| %-20s| 0x%08x | \"%s\" | type=%d |", 246 s.getName().string(), 247 s.getVendor().string(), 248 s.getStringType().string(), 249 s.getHandle(), 250 s.getRequiredPermission().string(), 251 s.getType()); 252 253 const int reportingMode = s.getReportingMode(); 254 if (reportingMode == AREPORTING_MODE_CONTINUOUS) { 255 result.append(" continuous | "); 256 } else if (reportingMode == AREPORTING_MODE_ON_CHANGE) { 257 result.append(" on-change | "); 258 } else if (reportingMode == AREPORTING_MODE_ONE_SHOT) { 259 result.append(" one-shot | "); 260 } else { 261 result.append(" special-trigger | "); 262 } 263 264 if (s.getMaxDelay() > 0) { 265 result.appendFormat("minRate=%.2fHz | ", 1e6f / s.getMaxDelay()); 266 } else { 267 result.appendFormat("maxDelay=%dus |", s.getMaxDelay()); 268 } 269 270 if (s.getMinDelay() > 0) { 271 result.appendFormat("maxRate=%.2fHz | ", 1e6f / s.getMinDelay()); 272 } else { 273 result.appendFormat("minDelay=%dus |", s.getMinDelay()); 274 } 275 276 if (s.getFifoMaxEventCount() > 0) { 277 result.appendFormat("FifoMax=%d events | ", 278 s.getFifoMaxEventCount()); 279 } else { 280 result.append("no batching | "); 281 } 282 283 if (s.isWakeUpSensor()) { 284 result.appendFormat("wakeUp | "); 285 } else { 286 result.appendFormat("non-wakeUp | "); 287 } 288 289 switch (s.getType()) { 290 case SENSOR_TYPE_ROTATION_VECTOR: 291 case SENSOR_TYPE_GEOMAGNETIC_ROTATION_VECTOR: 292 result.appendFormat( 293 "last=<%5.1f,%5.1f,%5.1f,%5.1f,%5.1f, %" PRId64 ">\n", 294 e.data[0], e.data[1], e.data[2], e.data[3], e.data[4], e.timestamp); 295 break; 296 case SENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED: 297 case SENSOR_TYPE_GYROSCOPE_UNCALIBRATED: 298 result.appendFormat( 299 "last=<%5.1f,%5.1f,%5.1f,%5.1f,%5.1f,%5.1f, %" PRId64 ">\n", 300 e.data[0], e.data[1], e.data[2], e.data[3], e.data[4], e.data[5], 301 e.timestamp); 302 break; 303 case SENSOR_TYPE_GAME_ROTATION_VECTOR: 304 result.appendFormat( 305 "last=<%5.1f,%5.1f,%5.1f,%5.1f, %" PRId64 ">\n", 306 e.data[0], e.data[1], e.data[2], e.data[3], e.timestamp); 307 break; 308 case SENSOR_TYPE_SIGNIFICANT_MOTION: 309 case SENSOR_TYPE_STEP_DETECTOR: 310 result.appendFormat( "last=<%f %" PRId64 ">\n", e.data[0], e.timestamp); 311 break; 312 case SENSOR_TYPE_STEP_COUNTER: 313 result.appendFormat( "last=<%" PRIu64 ", %" PRId64 ">\n", e.u64.step_counter, 314 e.timestamp); 315 break; 316 default: 317 // default to 3 values 318 result.appendFormat( 319 "last=<%5.1f,%5.1f,%5.1f, %" PRId64 ">\n", 320 e.data[0], e.data[1], e.data[2], e.timestamp); 321 break; 322 } 323 result.append("\n"); 324 } 325 SensorFusion::getInstance().dump(result); 326 SensorDevice::getInstance().dump(result); 327 328 result.append("Active sensors:\n"); 329 for (size_t i=0 ; i<mActiveSensors.size() ; i++) { 330 int handle = mActiveSensors.keyAt(i); 331 result.appendFormat("%s (handle=0x%08x, connections=%zu)\n", 332 getSensorName(handle).string(), 333 handle, 334 mActiveSensors.valueAt(i)->getNumConnections()); 335 } 336 337 result.appendFormat("Socket Buffer size = %d events\n", 338 mSocketBufferSize/sizeof(sensors_event_t)); 339 result.appendFormat("WakeLock Status: %s \n", mWakeLockAcquired ? "acquired" : "not held"); 340 result.appendFormat("%zd active connections\n", mActiveConnections.size()); 341 342 for (size_t i=0 ; i < mActiveConnections.size() ; i++) { 343 sp<SensorEventConnection> connection(mActiveConnections[i].promote()); 344 if (connection != 0) { 345 result.appendFormat("Connection Number: %zu \n", i); 346 connection->dump(result); 347 } 348 } 349 } 350 write(fd, result.string(), result.size()); 351 return NO_ERROR; 352} 353 354void SensorService::cleanupAutoDisabledSensorLocked(const sp<SensorEventConnection>& connection, 355 sensors_event_t const* buffer, const int count) { 356 for (int i=0 ; i<count ; i++) { 357 int handle = buffer[i].sensor; 358 if (buffer[i].type == SENSOR_TYPE_META_DATA) { 359 handle = buffer[i].meta_data.sensor; 360 } 361 if (connection->hasSensor(handle)) { 362 SensorInterface* sensor = mSensorMap.valueFor(handle); 363 // If this buffer has an event from a one_shot sensor and this connection is registered 364 // for this particular one_shot sensor, try cleaning up the connection. 365 if (sensor != NULL && 366 sensor->getSensor().getReportingMode() == AREPORTING_MODE_ONE_SHOT) { 367 sensor->autoDisable(connection.get(), handle); 368 cleanupWithoutDisableLocked(connection, handle); 369 } 370 } 371 } 372} 373 374bool SensorService::threadLoop() 375{ 376 ALOGD("nuSensorService thread starting..."); 377 378 // each virtual sensor could generate an event per "real" event, that's why we need 379 // to size numEventMax much smaller than MAX_RECEIVE_BUFFER_EVENT_COUNT. 380 // in practice, this is too aggressive, but guaranteed to be enough. 381 const size_t minBufferSize = SensorEventQueue::MAX_RECEIVE_BUFFER_EVENT_COUNT; 382 const size_t numEventMax = minBufferSize / (1 + mVirtualSensorList.size()); 383 384 SensorDevice& device(SensorDevice::getInstance()); 385 const size_t vcount = mVirtualSensorList.size(); 386 387 SensorEventAckReceiver sender(this); 388 sender.run("SensorEventAckReceiver", PRIORITY_URGENT_DISPLAY); 389 const int halVersion = device.getHalDeviceVersion(); 390 do { 391 ssize_t count = device.poll(mSensorEventBuffer, numEventMax); 392 if (count < 0) { 393 ALOGE("sensor poll failed (%s)", strerror(-count)); 394 break; 395 } 396 397 // Reset sensors_event_t.flags to zero for all events in the buffer. 398 for (int i = 0; i < count; i++) { 399 mSensorEventBuffer[i].flags = 0; 400 } 401 Mutex::Autolock _l(mLock); 402 // Poll has returned. Hold a wakelock if one of the events is from a wake up sensor. The 403 // rest of this loop is under a critical section protected by mLock. Acquiring a wakeLock, 404 // sending events to clients (incrementing SensorEventConnection::mWakeLockRefCount) should 405 // not be interleaved with decrementing SensorEventConnection::mWakeLockRefCount and 406 // releasing the wakelock. 407 bool bufferHasWakeUpEvent = false; 408 for (int i = 0; i < count; i++) { 409 if (isWakeUpSensorEvent(mSensorEventBuffer[i])) { 410 bufferHasWakeUpEvent = true; 411 break; 412 } 413 } 414 415 if (bufferHasWakeUpEvent && !mWakeLockAcquired) { 416 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_NAME); 417 mWakeLockAcquired = true; 418 ALOGD_IF(DEBUG_CONNECTIONS, "acquired wakelock %s", WAKE_LOCK_NAME); 419 } 420 recordLastValueLocked(mSensorEventBuffer, count); 421 422 // handle virtual sensors 423 if (count && vcount) { 424 sensors_event_t const * const event = mSensorEventBuffer; 425 const size_t activeVirtualSensorCount = mActiveVirtualSensors.size(); 426 if (activeVirtualSensorCount) { 427 size_t k = 0; 428 SensorFusion& fusion(SensorFusion::getInstance()); 429 if (fusion.isEnabled()) { 430 for (size_t i=0 ; i<size_t(count) ; i++) { 431 fusion.process(event[i]); 432 } 433 } 434 for (size_t i=0 ; i<size_t(count) && k<minBufferSize ; i++) { 435 for (size_t j=0 ; j<activeVirtualSensorCount ; j++) { 436 if (count + k >= minBufferSize) { 437 ALOGE("buffer too small to hold all events: " 438 "count=%zd, k=%zu, size=%zu", 439 count, k, minBufferSize); 440 break; 441 } 442 sensors_event_t out; 443 SensorInterface* si = mActiveVirtualSensors.valueAt(j); 444 if (si->process(&out, event[i])) { 445 mSensorEventBuffer[count + k] = out; 446 k++; 447 } 448 } 449 } 450 if (k) { 451 // record the last synthesized values 452 recordLastValueLocked(&mSensorEventBuffer[count], k); 453 count += k; 454 // sort the buffer by time-stamps 455 sortEventBuffer(mSensorEventBuffer, count); 456 } 457 } 458 } 459 460 // handle backward compatibility for RotationVector sensor 461 if (halVersion < SENSORS_DEVICE_API_VERSION_1_0) { 462 for (int i = 0; i < count; i++) { 463 if (mSensorEventBuffer[i].type == SENSOR_TYPE_ROTATION_VECTOR) { 464 // All the 4 components of the quaternion should be available 465 // No heading accuracy. Set it to -1 466 mSensorEventBuffer[i].data[4] = -1; 467 } 468 } 469 } 470 471 // Map flush_complete_events in the buffer to SensorEventConnections which called 472 // flush on the hardware sensor. mapFlushEventsToConnections[i] will be the 473 // SensorEventConnection mapped to the corresponding flush_complete_event in 474 // mSensorEventBuffer[i] if such a mapping exists (NULL otherwise). 475 for (int i = 0; i < count; ++i) { 476 mMapFlushEventsToConnections[i] = NULL; 477 if (mSensorEventBuffer[i].type == SENSOR_TYPE_META_DATA) { 478 const int sensor_handle = mSensorEventBuffer[i].meta_data.sensor; 479 SensorRecord* rec = mActiveSensors.valueFor(sensor_handle); 480 if (rec != NULL) { 481 mMapFlushEventsToConnections[i] = rec->getFirstPendingFlushConnection(); 482 rec->removeFirstPendingFlushConnection(); 483 } 484 } 485 } 486 487 // Send our events to clients. Check the state of wake lock for each client and release the 488 // lock if none of the clients need it. 489 bool needsWakeLock = false; 490 // Make a copy of the connection vector as some connections may be removed during the 491 // course of this loop (especially when one-shot sensor events are present in the 492 // sensor_event buffer). 493 const SortedVector< wp<SensorEventConnection> > activeConnections(mActiveConnections); 494 size_t numConnections = activeConnections.size(); 495 for (size_t i=0 ; i < numConnections; ++i) { 496 sp<SensorEventConnection> connection(activeConnections[i].promote()); 497 if (connection != 0) { 498 connection->sendEvents(mSensorEventBuffer, count, mSensorEventScratch, 499 mMapFlushEventsToConnections); 500 needsWakeLock |= connection->needsWakeLock(); 501 // If the connection has one-shot sensors, it may be cleaned up after first trigger. 502 // Early check for one-shot sensors. 503 if (connection->hasOneShotSensors()) { 504 cleanupAutoDisabledSensorLocked(connection, mSensorEventBuffer, count); 505 } 506 } 507 } 508 509 if (mWakeLockAcquired && !needsWakeLock) { 510 release_wake_lock(WAKE_LOCK_NAME); 511 mWakeLockAcquired = false; 512 ALOGD_IF(DEBUG_CONNECTIONS, "released wakelock %s", WAKE_LOCK_NAME); 513 } 514 } while (!Thread::exitPending()); 515 516 ALOGW("Exiting SensorService::threadLoop => aborting..."); 517 abort(); 518 return false; 519} 520 521sp<Looper> SensorService::getLooper() const { 522 return mLooper; 523} 524 525bool SensorService::SensorEventAckReceiver::threadLoop() { 526 ALOGD("new thread SensorEventAckReceiver"); 527 do { 528 sp<Looper> looper = mService->getLooper(); 529 looper->pollOnce(-1); 530 } while(!Thread::exitPending()); 531 return false; 532} 533 534void SensorService::recordLastValueLocked( 535 const sensors_event_t* buffer, size_t count) { 536 const sensors_event_t* last = NULL; 537 for (size_t i = 0; i < count; i++) { 538 const sensors_event_t* event = &buffer[i]; 539 if (event->type != SENSOR_TYPE_META_DATA) { 540 if (last && event->sensor != last->sensor) { 541 mLastEventSeen.editValueFor(last->sensor) = *last; 542 } 543 last = event; 544 } 545 } 546 if (last) { 547 mLastEventSeen.editValueFor(last->sensor) = *last; 548 } 549} 550 551void SensorService::sortEventBuffer(sensors_event_t* buffer, size_t count) 552{ 553 struct compar { 554 static int cmp(void const* lhs, void const* rhs) { 555 sensors_event_t const* l = static_cast<sensors_event_t const*>(lhs); 556 sensors_event_t const* r = static_cast<sensors_event_t const*>(rhs); 557 return l->timestamp - r->timestamp; 558 } 559 }; 560 qsort(buffer, count, sizeof(sensors_event_t), compar::cmp); 561} 562 563String8 SensorService::getSensorName(int handle) const { 564 size_t count = mUserSensorList.size(); 565 for (size_t i=0 ; i<count ; i++) { 566 const Sensor& sensor(mUserSensorList[i]); 567 if (sensor.getHandle() == handle) { 568 return sensor.getName(); 569 } 570 } 571 String8 result("unknown"); 572 return result; 573} 574 575bool SensorService::isVirtualSensor(int handle) const { 576 SensorInterface* sensor = mSensorMap.valueFor(handle); 577 return sensor->isVirtual(); 578} 579 580bool SensorService::isWakeUpSensorEvent(const sensors_event_t& event) const { 581 int handle = event.sensor; 582 if (event.type == SENSOR_TYPE_META_DATA) { 583 handle = event.meta_data.sensor; 584 } 585 SensorInterface* sensor = mSensorMap.valueFor(handle); 586 return sensor != NULL && sensor->getSensor().isWakeUpSensor(); 587} 588 589 590SensorService::SensorRecord * SensorService::getSensorRecord(int handle) { 591 return mActiveSensors.valueFor(handle); 592} 593 594Vector<Sensor> SensorService::getSensorList() 595{ 596 char value[PROPERTY_VALUE_MAX]; 597 property_get("debug.sensors", value, "0"); 598 const Vector<Sensor>& initialSensorList = (atoi(value)) ? 599 mUserSensorListDebug : mUserSensorList; 600 Vector<Sensor> accessibleSensorList; 601 for (size_t i = 0; i < initialSensorList.size(); i++) { 602 Sensor sensor = initialSensorList[i]; 603 if (canAccessSensor(sensor)) { 604 accessibleSensorList.add(sensor); 605 } else { 606 String8 infoMessage; 607 infoMessage.appendFormat( 608 "Skipped sensor %s because it requires permission %s", 609 sensor.getName().string(), 610 sensor.getRequiredPermission().string()); 611 ALOGI(infoMessage.string()); 612 } 613 } 614 return accessibleSensorList; 615} 616 617sp<ISensorEventConnection> SensorService::createSensorEventConnection() 618{ 619 uid_t uid = IPCThreadState::self()->getCallingUid(); 620 sp<SensorEventConnection> result(new SensorEventConnection(this, uid)); 621 return result; 622} 623 624void SensorService::cleanupConnection(SensorEventConnection* c) 625{ 626 Mutex::Autolock _l(mLock); 627 const wp<SensorEventConnection> connection(c); 628 size_t size = mActiveSensors.size(); 629 ALOGD_IF(DEBUG_CONNECTIONS, "%zu active sensors", size); 630 for (size_t i=0 ; i<size ; ) { 631 int handle = mActiveSensors.keyAt(i); 632 if (c->hasSensor(handle)) { 633 ALOGD_IF(DEBUG_CONNECTIONS, "%zu: disabling handle=0x%08x", i, handle); 634 SensorInterface* sensor = mSensorMap.valueFor( handle ); 635 ALOGE_IF(!sensor, "mSensorMap[handle=0x%08x] is null!", handle); 636 if (sensor) { 637 sensor->activate(c, false); 638 } 639 } 640 SensorRecord* rec = mActiveSensors.valueAt(i); 641 ALOGE_IF(!rec, "mActiveSensors[%zu] is null (handle=0x%08x)!", i, handle); 642 ALOGD_IF(DEBUG_CONNECTIONS, 643 "removing connection %p for sensor[%zu].handle=0x%08x", 644 c, i, handle); 645 646 if (rec && rec->removeConnection(connection)) { 647 ALOGD_IF(DEBUG_CONNECTIONS, "... and it was the last connection"); 648 mActiveSensors.removeItemsAt(i, 1); 649 mActiveVirtualSensors.removeItem(handle); 650 delete rec; 651 size--; 652 } else { 653 i++; 654 } 655 } 656 mActiveConnections.remove(connection); 657 BatteryService::cleanup(c->getUid()); 658 if (c->needsWakeLock()) { 659 checkWakeLockStateLocked(); 660 } 661} 662 663Sensor SensorService::getSensorFromHandle(int handle) const { 664 return mSensorMap.valueFor(handle)->getSensor(); 665} 666 667status_t SensorService::enable(const sp<SensorEventConnection>& connection, 668 int handle, nsecs_t samplingPeriodNs, nsecs_t maxBatchReportLatencyNs, int reservedFlags) 669{ 670 if (mInitCheck != NO_ERROR) 671 return mInitCheck; 672 673 SensorInterface* sensor = mSensorMap.valueFor(handle); 674 if (sensor == NULL) { 675 return BAD_VALUE; 676 } 677 678 if (!verifyCanAccessSensor(sensor->getSensor(), "Tried enabling")) { 679 return BAD_VALUE; 680 } 681 682 Mutex::Autolock _l(mLock); 683 SensorRecord* rec = mActiveSensors.valueFor(handle); 684 if (rec == 0) { 685 rec = new SensorRecord(connection); 686 mActiveSensors.add(handle, rec); 687 if (sensor->isVirtual()) { 688 mActiveVirtualSensors.add(handle, sensor); 689 } 690 } else { 691 if (rec->addConnection(connection)) { 692 // this sensor is already activated, but we are adding a connection that uses it. 693 // Immediately send down the last known value of the requested sensor if it's not a 694 // "continuous" sensor. 695 if (sensor->getSensor().getReportingMode() == AREPORTING_MODE_ON_CHANGE) { 696 // NOTE: The wake_up flag of this event may get set to 697 // WAKE_UP_SENSOR_EVENT_NEEDS_ACK if this is a wake_up event. 698 sensors_event_t& event(mLastEventSeen.editValueFor(handle)); 699 if (event.version == sizeof(sensors_event_t)) { 700 if (isWakeUpSensorEvent(event) && !mWakeLockAcquired) { 701 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_NAME); 702 mWakeLockAcquired = true; 703 ALOGD_IF(DEBUG_CONNECTIONS, "acquired wakelock for on_change sensor %s", 704 WAKE_LOCK_NAME); 705 } 706 connection->sendEvents(&event, 1, NULL); 707 if (!connection->needsWakeLock() && mWakeLockAcquired) { 708 checkWakeLockStateLocked(); 709 } 710 } 711 } 712 } 713 } 714 715 if (connection->addSensor(handle)) { 716 BatteryService::enableSensor(connection->getUid(), handle); 717 // the sensor was added (which means it wasn't already there) 718 // so, see if this connection becomes active 719 if (mActiveConnections.indexOf(connection) < 0) { 720 mActiveConnections.add(connection); 721 } 722 } else { 723 ALOGW("sensor %08x already enabled in connection %p (ignoring)", 724 handle, connection.get()); 725 } 726 727 nsecs_t minDelayNs = sensor->getSensor().getMinDelayNs(); 728 if (samplingPeriodNs < minDelayNs) { 729 samplingPeriodNs = minDelayNs; 730 } 731 732 ALOGD_IF(DEBUG_CONNECTIONS, "Calling batch handle==%d flags=%d" 733 "rate=%" PRId64 " timeout== %" PRId64"", 734 handle, reservedFlags, samplingPeriodNs, maxBatchReportLatencyNs); 735 736 status_t err = sensor->batch(connection.get(), handle, reservedFlags, samplingPeriodNs, 737 maxBatchReportLatencyNs); 738 739 // Call flush() before calling activate() on the sensor. Wait for a first flush complete 740 // event before sending events on this connection. Ignore one-shot sensors which don't 741 // support flush(). Also if this sensor isn't already active, don't call flush(). 742 if (err == NO_ERROR && sensor->getSensor().getReportingMode() != AREPORTING_MODE_ONE_SHOT && 743 rec->getNumConnections() > 1) { 744 connection->setFirstFlushPending(handle, true); 745 status_t err_flush = sensor->flush(connection.get(), handle); 746 // Flush may return error if the underlying h/w sensor uses an older HAL. 747 if (err_flush == NO_ERROR) { 748 rec->addPendingFlushConnection(connection.get()); 749 } else { 750 connection->setFirstFlushPending(handle, false); 751 } 752 } 753 754 if (err == NO_ERROR) { 755 ALOGD_IF(DEBUG_CONNECTIONS, "Calling activate on %d", handle); 756 err = sensor->activate(connection.get(), true); 757 } 758 759 if (err == NO_ERROR && sensor->getSensor().isWakeUpSensor()) { 760 // Add the file descriptor to the Looper for receiving acknowledgments; 761 int ret = mLooper->addFd(connection->getSensorChannel()->getSendFd(), 0, 762 ALOOPER_EVENT_INPUT, connection.get(), NULL); 763 } 764 765 if (err != NO_ERROR) { 766 // batch/activate has failed, reset our state. 767 cleanupWithoutDisableLocked(connection, handle); 768 } 769 return err; 770} 771 772status_t SensorService::disable(const sp<SensorEventConnection>& connection, 773 int handle) 774{ 775 if (mInitCheck != NO_ERROR) 776 return mInitCheck; 777 778 Mutex::Autolock _l(mLock); 779 status_t err = cleanupWithoutDisableLocked(connection, handle); 780 if (err == NO_ERROR) { 781 SensorInterface* sensor = mSensorMap.valueFor(handle); 782 err = sensor ? sensor->activate(connection.get(), false) : status_t(BAD_VALUE); 783 } 784 return err; 785} 786 787status_t SensorService::cleanupWithoutDisable( 788 const sp<SensorEventConnection>& connection, int handle) { 789 Mutex::Autolock _l(mLock); 790 return cleanupWithoutDisableLocked(connection, handle); 791} 792 793status_t SensorService::cleanupWithoutDisableLocked( 794 const sp<SensorEventConnection>& connection, int handle) { 795 SensorRecord* rec = mActiveSensors.valueFor(handle); 796 if (rec) { 797 // see if this connection becomes inactive 798 if (connection->removeSensor(handle)) { 799 BatteryService::disableSensor(connection->getUid(), handle); 800 } 801 if (connection->hasAnySensor() == false) { 802 mActiveConnections.remove(connection); 803 } 804 // see if this sensor becomes inactive 805 if (rec->removeConnection(connection)) { 806 mActiveSensors.removeItem(handle); 807 mActiveVirtualSensors.removeItem(handle); 808 delete rec; 809 } 810 return NO_ERROR; 811 } 812 return BAD_VALUE; 813} 814 815status_t SensorService::setEventRate(const sp<SensorEventConnection>& connection, 816 int handle, nsecs_t ns) 817{ 818 if (mInitCheck != NO_ERROR) 819 return mInitCheck; 820 821 SensorInterface* sensor = mSensorMap.valueFor(handle); 822 if (!sensor) 823 return BAD_VALUE; 824 825 if (!verifyCanAccessSensor(sensor->getSensor(), "Tried configuring")) { 826 return BAD_VALUE; 827 } 828 829 if (ns < 0) 830 return BAD_VALUE; 831 832 nsecs_t minDelayNs = sensor->getSensor().getMinDelayNs(); 833 if (ns < minDelayNs) { 834 ns = minDelayNs; 835 } 836 837 return sensor->setDelay(connection.get(), handle, ns); 838} 839 840status_t SensorService::flushSensor(const sp<SensorEventConnection>& connection) { 841 if (mInitCheck != NO_ERROR) return mInitCheck; 842 SensorDevice& dev(SensorDevice::getInstance()); 843 const int halVersion = dev.getHalDeviceVersion(); 844 status_t err(NO_ERROR); 845 Mutex::Autolock _l(mLock); 846 // Loop through all sensors for this connection and call flush on each of them. 847 for (size_t i = 0; i < connection->mSensorInfo.size(); ++i) { 848 const int handle = connection->mSensorInfo.keyAt(i); 849 SensorInterface* sensor = mSensorMap.valueFor(handle); 850 if (sensor->getSensor().getReportingMode() == AREPORTING_MODE_ONE_SHOT) { 851 ALOGE("flush called on a one-shot sensor"); 852 err = INVALID_OPERATION; 853 continue; 854 } 855 SensorEventConnection::FlushInfo& flushInfo = connection->mSensorInfo.editValueFor(handle); 856 if (halVersion <= SENSORS_DEVICE_API_VERSION_1_0 || isVirtualSensor(handle)) { 857 // For older devices just increment pending flush count which will send a trivial 858 // flush complete event. 859 flushInfo.mPendingFlushEventsToSend++; 860 } else { 861 status_t err_flush = sensor->flush(connection.get(), handle); 862 if (err_flush == NO_ERROR) { 863 SensorRecord* rec = mActiveSensors.valueFor(handle); 864 if (rec != NULL) rec->addPendingFlushConnection(connection); 865 } 866 err = (err_flush != NO_ERROR) ? err_flush : err; 867 } 868 } 869 return err; 870} 871 872bool SensorService::canAccessSensor(const Sensor& sensor) { 873 return (sensor.getRequiredPermission().isEmpty()) || 874 PermissionCache::checkCallingPermission(String16(sensor.getRequiredPermission())); 875} 876 877bool SensorService::verifyCanAccessSensor(const Sensor& sensor, const char* operation) { 878 if (canAccessSensor(sensor)) { 879 return true; 880 } else { 881 String8 errorMessage; 882 errorMessage.appendFormat( 883 "%s a sensor (%s) without holding its required permission: %s", 884 operation, 885 sensor.getName().string(), 886 sensor.getRequiredPermission().string()); 887 return false; 888 } 889} 890 891void SensorService::checkWakeLockState() { 892 Mutex::Autolock _l(mLock); 893 checkWakeLockStateLocked(); 894} 895 896void SensorService::checkWakeLockStateLocked() { 897 if (!mWakeLockAcquired) { 898 return; 899 } 900 bool releaseLock = true; 901 for (size_t i=0 ; i<mActiveConnections.size() ; i++) { 902 sp<SensorEventConnection> connection(mActiveConnections[i].promote()); 903 if (connection != 0) { 904 if (connection->needsWakeLock()) { 905 releaseLock = false; 906 break; 907 } 908 } 909 } 910 if (releaseLock) { 911 ALOGD_IF(DEBUG_CONNECTIONS, "releasing wakelock %s", WAKE_LOCK_NAME); 912 release_wake_lock(WAKE_LOCK_NAME); 913 mWakeLockAcquired = false; 914 } 915} 916 917// --------------------------------------------------------------------------- 918SensorService::SensorRecord::SensorRecord( 919 const sp<SensorEventConnection>& connection) 920{ 921 mConnections.add(connection); 922} 923 924bool SensorService::SensorRecord::addConnection( 925 const sp<SensorEventConnection>& connection) 926{ 927 if (mConnections.indexOf(connection) < 0) { 928 mConnections.add(connection); 929 return true; 930 } 931 return false; 932} 933 934bool SensorService::SensorRecord::removeConnection( 935 const wp<SensorEventConnection>& connection) 936{ 937 ssize_t index = mConnections.indexOf(connection); 938 if (index >= 0) { 939 mConnections.removeItemsAt(index, 1); 940 } 941 // Remove this connections from the queue of flush() calls made on this sensor. 942 for (Vector< wp<SensorEventConnection> >::iterator it = 943 mPendingFlushConnections.begin(); it != mPendingFlushConnections.end();) { 944 if (it->unsafe_get() == connection.unsafe_get()) { 945 it = mPendingFlushConnections.erase(it); 946 } else { 947 ++it; 948 } 949 } 950 return mConnections.size() ? false : true; 951} 952 953void SensorService::SensorRecord::addPendingFlushConnection( 954 const sp<SensorEventConnection>& connection) { 955 mPendingFlushConnections.add(connection); 956} 957 958void SensorService::SensorRecord::removeFirstPendingFlushConnection() { 959 if (mPendingFlushConnections.size() > 0) { 960 mPendingFlushConnections.removeAt(0); 961 } 962} 963 964SensorService::SensorEventConnection * 965SensorService::SensorRecord::getFirstPendingFlushConnection() { 966 if (mPendingFlushConnections.size() > 0) { 967 return mPendingFlushConnections[0].unsafe_get(); 968 } 969 return NULL; 970} 971 972// --------------------------------------------------------------------------- 973 974SensorService::SensorEventConnection::SensorEventConnection( 975 const sp<SensorService>& service, uid_t uid) 976 : mService(service), mUid(uid), mWakeLockRefCount(0), mEventCache(NULL), mCacheSize(0), 977 mMaxCacheSize(0) { 978 const SensorDevice& device(SensorDevice::getInstance()); 979 mChannel = new BitTube(mService->mSocketBufferSize); 980#if DEBUG_CONNECTIONS 981 mEventsReceived = mEventsSentFromCache = mEventsSent = 0; 982 mTotalAcksNeeded = mTotalAcksReceived = 0; 983#endif 984} 985 986SensorService::SensorEventConnection::~SensorEventConnection() { 987 ALOGD_IF(DEBUG_CONNECTIONS, "~SensorEventConnection(%p)", this); 988 if (mEventCache != NULL) { 989 delete mEventCache; 990 } 991 mService->cleanupConnection(this); 992} 993 994void SensorService::SensorEventConnection::onFirstRef() { 995 LooperCallback::onFirstRef(); 996} 997 998bool SensorService::SensorEventConnection::needsWakeLock() { 999 Mutex::Autolock _l(mConnectionLock); 1000 return mWakeLockRefCount > 0; 1001} 1002 1003void SensorService::SensorEventConnection::dump(String8& result) { 1004 Mutex::Autolock _l(mConnectionLock); 1005 result.appendFormat("\t WakeLockRefCount %d | uid %d | cache size %d | max cache size %d\n", 1006 mWakeLockRefCount, mUid, mCacheSize, mMaxCacheSize); 1007 for (size_t i = 0; i < mSensorInfo.size(); ++i) { 1008 const FlushInfo& flushInfo = mSensorInfo.valueAt(i); 1009 result.appendFormat("\t %s 0x%08x | status: %s | pending flush events %d \n", 1010 mService->getSensorName(mSensorInfo.keyAt(i)).string(), 1011 mSensorInfo.keyAt(i), 1012 flushInfo.mFirstFlushPending ? "First flush pending" : 1013 "active", 1014 flushInfo.mPendingFlushEventsToSend); 1015 } 1016#if DEBUG_CONNECTIONS 1017 result.appendFormat("\t events recvd: %d | sent %d | cache %d | dropped %d |" 1018 " total_acks_needed %d | total_acks_recvd %d\n", 1019 mEventsReceived, 1020 mEventsSent, 1021 mEventsSentFromCache, 1022 mEventsReceived - (mEventsSentFromCache + mEventsSent + mCacheSize), 1023 mTotalAcksNeeded, 1024 mTotalAcksReceived); 1025#endif 1026} 1027 1028bool SensorService::SensorEventConnection::addSensor(int32_t handle) { 1029 Mutex::Autolock _l(mConnectionLock); 1030 if (!verifyCanAccessSensor(mService->getSensorFromHandle(handle), "Tried adding")) { 1031 return false; 1032 } 1033 if (mSensorInfo.indexOfKey(handle) < 0) { 1034 mSensorInfo.add(handle, FlushInfo()); 1035 return true; 1036 } 1037 return false; 1038} 1039 1040bool SensorService::SensorEventConnection::removeSensor(int32_t handle) { 1041 Mutex::Autolock _l(mConnectionLock); 1042 if (mSensorInfo.removeItem(handle) >= 0) { 1043 return true; 1044 } 1045 return false; 1046} 1047 1048bool SensorService::SensorEventConnection::hasSensor(int32_t handle) const { 1049 Mutex::Autolock _l(mConnectionLock); 1050 return mSensorInfo.indexOfKey(handle) >= 0; 1051} 1052 1053bool SensorService::SensorEventConnection::hasAnySensor() const { 1054 Mutex::Autolock _l(mConnectionLock); 1055 return mSensorInfo.size() ? true : false; 1056} 1057 1058bool SensorService::SensorEventConnection::hasOneShotSensors() const { 1059 Mutex::Autolock _l(mConnectionLock); 1060 for (size_t i = 0; i < mSensorInfo.size(); ++i) { 1061 const int handle = mSensorInfo.keyAt(i); 1062 if (mService->getSensorFromHandle(handle).getReportingMode() == AREPORTING_MODE_ONE_SHOT) { 1063 return true; 1064 } 1065 } 1066 return false; 1067} 1068 1069void SensorService::SensorEventConnection::setFirstFlushPending(int32_t handle, 1070 bool value) { 1071 Mutex::Autolock _l(mConnectionLock); 1072 ssize_t index = mSensorInfo.indexOfKey(handle); 1073 if (index >= 0) { 1074 FlushInfo& flushInfo = mSensorInfo.editValueAt(index); 1075 flushInfo.mFirstFlushPending = value; 1076 } 1077} 1078 1079status_t SensorService::SensorEventConnection::sendEvents( 1080 sensors_event_t const* buffer, size_t numEvents, 1081 sensors_event_t* scratch, 1082 SensorEventConnection const * const * mapFlushEventsToConnections) { 1083 // filter out events not for this connection 1084 size_t count = 0; 1085 Mutex::Autolock _l(mConnectionLock); 1086 if (scratch) { 1087 size_t i=0; 1088 while (i<numEvents) { 1089 int32_t sensor_handle = buffer[i].sensor; 1090 if (buffer[i].type == SENSOR_TYPE_META_DATA) { 1091 ALOGD_IF(DEBUG_CONNECTIONS, "flush complete event sensor==%d ", 1092 buffer[i].meta_data.sensor); 1093 // Setting sensor_handle to the correct sensor to ensure the sensor events per connection are 1094 // filtered correctly. buffer[i].sensor is zero for meta_data events. 1095 sensor_handle = buffer[i].meta_data.sensor; 1096 } 1097 ssize_t index = mSensorInfo.indexOfKey(sensor_handle); 1098 // Check if this connection has registered for this sensor. If not continue to the 1099 // next sensor_event. 1100 if (index < 0) { 1101 ++i; 1102 continue; 1103 } 1104 1105 FlushInfo& flushInfo = mSensorInfo.editValueAt(index); 1106 // Check if there is a pending flush_complete event for this sensor on this connection. 1107 if (buffer[i].type == SENSOR_TYPE_META_DATA && flushInfo.mFirstFlushPending == true && 1108 this == mapFlushEventsToConnections[i]) { 1109 flushInfo.mFirstFlushPending = false; 1110 ALOGD_IF(DEBUG_CONNECTIONS, "First flush event for sensor==%d ", 1111 buffer[i].meta_data.sensor); 1112 ++i; 1113 continue; 1114 } 1115 1116 // If there is a pending flush complete event for this sensor on this connection, 1117 // ignore the event and proceed to the next. 1118 if (flushInfo.mFirstFlushPending) { 1119 ++i; 1120 continue; 1121 } 1122 1123 do { 1124 // Keep copying events into the scratch buffer as long as they are regular 1125 // sensor_events are from the same sensor_handle OR they are flush_complete_events 1126 // from the same sensor_handle AND the current connection is mapped to the 1127 // corresponding flush_complete_event. 1128 if (buffer[i].type == SENSOR_TYPE_META_DATA) { 1129 if (this == mapFlushEventsToConnections[i]) { 1130 scratch[count++] = buffer[i]; 1131 } 1132 ++i; 1133 } else { 1134 // Regular sensor event, just copy it to the scratch buffer. 1135 scratch[count++] = buffer[i++]; 1136 } 1137 } while ((i<numEvents) && ((buffer[i].sensor == sensor_handle && 1138 buffer[i].type != SENSOR_TYPE_META_DATA) || 1139 (buffer[i].type == SENSOR_TYPE_META_DATA && 1140 buffer[i].meta_data.sensor == sensor_handle))); 1141 } 1142 } else { 1143 scratch = const_cast<sensors_event_t *>(buffer); 1144 count = numEvents; 1145 } 1146 1147 sendPendingFlushEventsLocked(); 1148 // Early return if there are no events for this connection. 1149 if (count == 0) { 1150 return status_t(NO_ERROR); 1151 } 1152 1153#if DEBUG_CONNECTIONS 1154 mEventsReceived += count; 1155#endif 1156 if (mCacheSize != 0) { 1157 // There are some events in the cache which need to be sent first. Copy this buffer to 1158 // the end of cache. 1159 if (mCacheSize + count <= mMaxCacheSize) { 1160 memcpy(&mEventCache[mCacheSize], scratch, count * sizeof(sensors_event_t)); 1161 mCacheSize += count; 1162 } else { 1163 // Check if any new sensors have registered on this connection which may have increased 1164 // the max cache size that is desired. 1165 if (mCacheSize + count < computeMaxCacheSizeLocked()) { 1166 reAllocateCacheLocked(scratch, count); 1167 return status_t(NO_ERROR); 1168 } 1169 // Some events need to be dropped. 1170 int remaningCacheSize = mMaxCacheSize - mCacheSize; 1171 if (remaningCacheSize != 0) { 1172 memcpy(&mEventCache[mCacheSize], scratch, 1173 remaningCacheSize * sizeof(sensors_event_t)); 1174 } 1175 int numEventsDropped = count - remaningCacheSize; 1176 countFlushCompleteEventsLocked(mEventCache, numEventsDropped); 1177 // Drop the first "numEventsDropped" in the cache. 1178 memmove(mEventCache, &mEventCache[numEventsDropped], 1179 (mCacheSize - numEventsDropped) * sizeof(sensors_event_t)); 1180 1181 // Copy the remainingEvents in scratch buffer to the end of cache. 1182 memcpy(&mEventCache[mCacheSize - numEventsDropped], scratch + remaningCacheSize, 1183 numEventsDropped * sizeof(sensors_event_t)); 1184 } 1185 return status_t(NO_ERROR); 1186 } 1187 1188 int index_wake_up_event = findWakeUpSensorEventLocked(scratch, count); 1189 if (index_wake_up_event >= 0) { 1190 scratch[index_wake_up_event].flags |= WAKE_UP_SENSOR_EVENT_NEEDS_ACK; 1191 ++mWakeLockRefCount; 1192#if DEBUG_CONNECTIONS 1193 ++mTotalAcksNeeded; 1194#endif 1195 } 1196 1197 // NOTE: ASensorEvent and sensors_event_t are the same type. 1198 ssize_t size = SensorEventQueue::write(mChannel, 1199 reinterpret_cast<ASensorEvent const*>(scratch), count); 1200 if (size < 0) { 1201 // Write error, copy events to local cache. 1202 if (index_wake_up_event >= 0) { 1203 // If there was a wake_up sensor_event, reset the flag. 1204 scratch[index_wake_up_event].flags &= ~WAKE_UP_SENSOR_EVENT_NEEDS_ACK; 1205 if (mWakeLockRefCount > 0) { 1206 --mWakeLockRefCount; 1207 } 1208#if DEBUG_CONNECTIONS 1209 --mTotalAcksNeeded; 1210#endif 1211 } 1212 if (mEventCache == NULL) { 1213 mMaxCacheSize = computeMaxCacheSizeLocked(); 1214 mEventCache = new sensors_event_t[mMaxCacheSize]; 1215 mCacheSize = 0; 1216 } 1217 memcpy(&mEventCache[mCacheSize], scratch, count * sizeof(sensors_event_t)); 1218 mCacheSize += count; 1219 1220 // Add this file descriptor to the looper to get a callback when this fd is available for 1221 // writing. 1222 mService->getLooper()->addFd(mChannel->getSendFd(), 0, 1223 ALOOPER_EVENT_OUTPUT | ALOOPER_EVENT_INPUT, this, NULL); 1224 return size; 1225 } 1226 1227#if DEBUG_CONNECTIONS 1228 if (size > 0) { 1229 mEventsSent += count; 1230 } 1231#endif 1232 1233 return size < 0 ? status_t(size) : status_t(NO_ERROR); 1234} 1235 1236void SensorService::SensorEventConnection::reAllocateCacheLocked(sensors_event_t const* scratch, 1237 int count) { 1238 sensors_event_t *eventCache_new; 1239 const int new_cache_size = computeMaxCacheSizeLocked(); 1240 // Allocate new cache, copy over events from the old cache & scratch, free up memory. 1241 eventCache_new = new sensors_event_t[new_cache_size]; 1242 memcpy(eventCache_new, mEventCache, mCacheSize * sizeof(sensors_event_t)); 1243 memcpy(&eventCache_new[mCacheSize], scratch, count * sizeof(sensors_event_t)); 1244 1245 ALOGD_IF(DEBUG_CONNECTIONS, "reAllocateCacheLocked maxCacheSize=%d %d", mMaxCacheSize, 1246 new_cache_size); 1247 1248 delete mEventCache; 1249 mEventCache = eventCache_new; 1250 mCacheSize += count; 1251 mMaxCacheSize = new_cache_size; 1252} 1253 1254void SensorService::SensorEventConnection::sendPendingFlushEventsLocked() { 1255 ASensorEvent flushCompleteEvent; 1256 memset(&flushCompleteEvent, 0, sizeof(flushCompleteEvent)); 1257 flushCompleteEvent.type = SENSOR_TYPE_META_DATA; 1258 // Loop through all the sensors for this connection and check if there are any pending 1259 // flush complete events to be sent. 1260 for (size_t i = 0; i < mSensorInfo.size(); ++i) { 1261 FlushInfo& flushInfo = mSensorInfo.editValueAt(i); 1262 while (flushInfo.mPendingFlushEventsToSend > 0) { 1263 const int sensor_handle = mSensorInfo.keyAt(i); 1264 flushCompleteEvent.meta_data.sensor = sensor_handle; 1265 if (mService->getSensorFromHandle(sensor_handle).isWakeUpSensor()) { 1266 flushCompleteEvent.flags |= WAKE_UP_SENSOR_EVENT_NEEDS_ACK; 1267 } 1268 ssize_t size = SensorEventQueue::write(mChannel, &flushCompleteEvent, 1); 1269 if (size < 0) { 1270 return; 1271 } 1272 ALOGD_IF(DEBUG_CONNECTIONS, "sent dropped flush complete event==%d ", 1273 flushCompleteEvent.meta_data.sensor); 1274 flushInfo.mPendingFlushEventsToSend--; 1275 } 1276 } 1277} 1278 1279void SensorService::SensorEventConnection::writeToSocketFromCacheLocked() { 1280 // At a time write at most half the size of the receiver buffer in SensorEventQueue OR 1281 // half the size of the socket buffer allocated in BitTube whichever is smaller. 1282 const int maxWriteSize = helpers::min(SensorEventQueue::MAX_RECEIVE_BUFFER_EVENT_COUNT/2, 1283 int(mService->mSocketBufferSize/(sizeof(sensors_event_t)*2))); 1284 // Send pending flush complete events (if any) 1285 sendPendingFlushEventsLocked(); 1286 for (int numEventsSent = 0; numEventsSent < mCacheSize;) { 1287 const int numEventsToWrite = helpers::min(mCacheSize - numEventsSent, maxWriteSize); 1288 int index_wake_up_event = 1289 findWakeUpSensorEventLocked(mEventCache + numEventsSent, numEventsToWrite); 1290 if (index_wake_up_event >= 0) { 1291 mEventCache[index_wake_up_event + numEventsSent].flags |= 1292 WAKE_UP_SENSOR_EVENT_NEEDS_ACK; 1293 ++mWakeLockRefCount; 1294#if DEBUG_CONNECTIONS 1295 ++mTotalAcksNeeded; 1296#endif 1297 } 1298 1299 ssize_t size = SensorEventQueue::write(mChannel, 1300 reinterpret_cast<ASensorEvent const*>(mEventCache + numEventsSent), 1301 numEventsToWrite); 1302 if (size < 0) { 1303 if (index_wake_up_event >= 0) { 1304 // If there was a wake_up sensor_event, reset the flag. 1305 mEventCache[index_wake_up_event + numEventsSent].flags &= 1306 ~WAKE_UP_SENSOR_EVENT_NEEDS_ACK; 1307 if (mWakeLockRefCount > 0) { 1308 --mWakeLockRefCount; 1309 } 1310#if DEBUG_CONNECTIONS 1311 --mTotalAcksNeeded; 1312#endif 1313 } 1314 memmove(mEventCache, &mEventCache[numEventsSent], 1315 (mCacheSize - numEventsSent) * sizeof(sensors_event_t)); 1316 ALOGD_IF(DEBUG_CONNECTIONS, "wrote %d events from cache size==%d ", 1317 numEventsSent, mCacheSize); 1318 mCacheSize -= numEventsSent; 1319 return; 1320 } 1321 numEventsSent += numEventsToWrite; 1322#if DEBUG_CONNECTIONS 1323 mEventsSentFromCache += numEventsToWrite; 1324#endif 1325 } 1326 ALOGD_IF(DEBUG_CONNECTIONS, "wrote all events from cache size=%d ", mCacheSize); 1327 // All events from the cache have been sent. Reset cache size to zero. 1328 mCacheSize = 0; 1329 // Poll only for ALOOPER_EVENT_INPUT(read) on the file descriptor. 1330 mService->getLooper()->addFd(mChannel->getSendFd(), 0, ALOOPER_EVENT_INPUT, this, NULL); 1331} 1332 1333void SensorService::SensorEventConnection::countFlushCompleteEventsLocked( 1334 sensors_event_t const* scratch, const int numEventsDropped) { 1335 ALOGD_IF(DEBUG_CONNECTIONS, "dropping %d events ", numEventsDropped); 1336 // Count flushComplete events in the events that are about to the dropped. These will be sent 1337 // separately before the next batch of events. 1338 for (int j = 0; j < numEventsDropped; ++j) { 1339 if (scratch[j].type == SENSOR_TYPE_META_DATA) { 1340 FlushInfo& flushInfo = mSensorInfo.editValueFor(scratch[j].meta_data.sensor); 1341 flushInfo.mPendingFlushEventsToSend++; 1342 ALOGD_IF(DEBUG_CONNECTIONS, "increment pendingFlushCount %d", 1343 flushInfo.mPendingFlushEventsToSend); 1344 } 1345 } 1346 return; 1347} 1348 1349int SensorService::SensorEventConnection::findWakeUpSensorEventLocked( 1350 sensors_event_t const* scratch, const int count) { 1351 for (int i = 0; i < count; ++i) { 1352 if (mService->isWakeUpSensorEvent(scratch[i])) { 1353 return i; 1354 } 1355 } 1356 return -1; 1357} 1358 1359sp<BitTube> SensorService::SensorEventConnection::getSensorChannel() const 1360{ 1361 return mChannel; 1362} 1363 1364status_t SensorService::SensorEventConnection::enableDisable( 1365 int handle, bool enabled, nsecs_t samplingPeriodNs, nsecs_t maxBatchReportLatencyNs, 1366 int reservedFlags) 1367{ 1368 status_t err; 1369 if (enabled) { 1370 err = mService->enable(this, handle, samplingPeriodNs, maxBatchReportLatencyNs, 1371 reservedFlags); 1372 1373 } else { 1374 err = mService->disable(this, handle); 1375 } 1376 return err; 1377} 1378 1379status_t SensorService::SensorEventConnection::setEventRate( 1380 int handle, nsecs_t samplingPeriodNs) 1381{ 1382 return mService->setEventRate(this, handle, samplingPeriodNs); 1383} 1384 1385status_t SensorService::SensorEventConnection::flush() { 1386 return mService->flushSensor(this); 1387} 1388 1389int SensorService::SensorEventConnection::handleEvent(int fd, int events, void* data) { 1390 if (events & ALOOPER_EVENT_HANGUP || events & ALOOPER_EVENT_ERROR) { 1391 return 0; 1392 } 1393 1394 if (events & ALOOPER_EVENT_INPUT) { 1395 char buf; 1396 ssize_t ret = ::recv(fd, &buf, sizeof(buf), MSG_DONTWAIT); 1397 1398 { 1399 Mutex::Autolock _l(mConnectionLock); 1400 if (mWakeLockRefCount > 0) { 1401 --mWakeLockRefCount; 1402 } 1403#if DEBUG_CONNECTIONS 1404 ++mTotalAcksReceived; 1405#endif 1406 } 1407 // Check if wakelock can be released by sensorservice. mConnectionLock needs to be released 1408 // here as checkWakeLockState() will need it. 1409 if (mWakeLockRefCount == 0) { 1410 mService->checkWakeLockState(); 1411 } 1412 // continue getting callbacks. 1413 return 1; 1414 } 1415 1416 if (events & ALOOPER_EVENT_OUTPUT) { 1417 // send sensor data that is stored in mEventCache. 1418 Mutex::Autolock _l(mConnectionLock); 1419 writeToSocketFromCacheLocked(); 1420 } 1421 return 1; 1422} 1423 1424int SensorService::SensorEventConnection::computeMaxCacheSizeLocked() const { 1425 int fifoWakeUpSensors = 0; 1426 int fifoNonWakeUpSensors = 0; 1427 for (size_t i = 0; i < mSensorInfo.size(); ++i) { 1428 const Sensor& sensor = mService->getSensorFromHandle(mSensorInfo.keyAt(i)); 1429 if (sensor.getFifoReservedEventCount() == sensor.getFifoMaxEventCount()) { 1430 // Each sensor has a reserved fifo. Sum up the fifo sizes for all wake up sensors and 1431 // non wake_up sensors. 1432 if (sensor.isWakeUpSensor()) { 1433 fifoWakeUpSensors += sensor.getFifoReservedEventCount(); 1434 } else { 1435 fifoNonWakeUpSensors += sensor.getFifoReservedEventCount(); 1436 } 1437 } else { 1438 // Shared fifo. Compute the max of the fifo sizes for wake_up and non_wake up sensors. 1439 if (sensor.isWakeUpSensor()) { 1440 fifoWakeUpSensors = fifoWakeUpSensors > sensor.getFifoMaxEventCount() ? 1441 fifoWakeUpSensors : sensor.getFifoMaxEventCount(); 1442 1443 } else { 1444 fifoNonWakeUpSensors = fifoNonWakeUpSensors > sensor.getFifoMaxEventCount() ? 1445 fifoNonWakeUpSensors : sensor.getFifoMaxEventCount(); 1446 1447 } 1448 } 1449 } 1450 if (fifoWakeUpSensors + fifoNonWakeUpSensors == 0) { 1451 // It is extremely unlikely that there is a write failure in non batch mode. Return a cache 1452 // size that is equal to that of the batch mode. 1453 // ALOGW("Write failure in non-batch mode"); 1454 return MAX_SOCKET_BUFFER_SIZE_BATCHED/sizeof(sensors_event_t); 1455 } 1456 return fifoWakeUpSensors + fifoNonWakeUpSensors; 1457} 1458 1459// --------------------------------------------------------------------------- 1460}; // namespace android 1461 1462